/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp

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//===-- ProcessGDBRemote.cpp ----------------------------------------------===//

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//

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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.

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// See https://llvm.org/LICENSE.txt for license information.

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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

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//

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//===----------------------------------------------------------------------===//

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#include "lldb/Host/Config.h"

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#include <cerrno>

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#include <cstdlib>

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#if LLDB_ENABLE_POSIX1

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#include <netinet/in.h>

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#include <sys/mman.h>

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#include <sys/socket.h>

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#include <unistd.h>

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#endif

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#include <sys/stat.h>

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#if defined(__APPLE__)

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#include <sys/sysctl.h>

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#endif

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#include <ctime>

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#include <sys/types.h>

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#include <algorithm>

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#include <csignal>

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#include <map>

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#include <memory>

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#include <mutex>

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#include <sstream>

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#include "lldb/Breakpoint/Watchpoint.h"

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#include "lldb/Core/Debugger.h"

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#include "lldb/Core/Module.h"

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#include "lldb/Core/ModuleSpec.h"

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#include "lldb/Core/PluginManager.h"

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#include "lldb/Core/StreamFile.h"

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#include "lldb/Core/Value.h"

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#include "lldb/DataFormatters/FormatManager.h"

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#include "lldb/Host/ConnectionFileDescriptor.h"

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#include "lldb/Host/FileSystem.h"

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#include "lldb/Host/HostThread.h"

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#include "lldb/Host/PosixApi.h"

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#include "lldb/Host/PseudoTerminal.h"

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#include "lldb/Host/StringConvert.h"

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#include "lldb/Host/ThreadLauncher.h"

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#include "lldb/Host/XML.h"

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#include "lldb/Interpreter/CommandInterpreter.h"

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#include "lldb/Interpreter/CommandObject.h"

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#include "lldb/Interpreter/CommandObjectMultiword.h"

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#include "lldb/Interpreter/CommandReturnObject.h"

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#include "lldb/Interpreter/OptionArgParser.h"

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#include "lldb/Interpreter/OptionGroupBoolean.h"

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#include "lldb/Interpreter/OptionGroupUInt64.h"

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#include "lldb/Interpreter/OptionValueProperties.h"

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#include "lldb/Interpreter/Options.h"

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#include "lldb/Interpreter/Property.h"

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#include "lldb/Symbol/LocateSymbolFile.h"

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#include "lldb/Symbol/ObjectFile.h"

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#include "lldb/Target/ABI.h"

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#include "lldb/Target/DynamicLoader.h"

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#include "lldb/Target/MemoryRegionInfo.h"

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#include "lldb/Target/SystemRuntime.h"

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#include "lldb/Target/Target.h"

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#include "lldb/Target/TargetList.h"

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#include "lldb/Target/ThreadPlanCallFunction.h"

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#include "lldb/Utility/Args.h"

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#include "lldb/Utility/FileSpec.h"

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#include "lldb/Utility/Reproducer.h"

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#include "lldb/Utility/State.h"

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#include "lldb/Utility/StreamString.h"

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#include "lldb/Utility/Timer.h"

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#include "GDBRemoteRegisterContext.h"

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#include "Plugins/Platform/MacOSX/PlatformRemoteiOS.h"

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#include "Plugins/Process/Utility/GDBRemoteSignals.h"

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#include "Plugins/Process/Utility/InferiorCallPOSIX.h"

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#include "Plugins/Process/Utility/StopInfoMachException.h"

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#include "ProcessGDBRemote.h"

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#include "ProcessGDBRemoteLog.h"

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#include "ThreadGDBRemote.h"

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#include "lldb/Host/Host.h"

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#include "lldb/Utility/StringExtractorGDBRemote.h"

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#include "llvm/ADT/ScopeExit.h"

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#include "llvm/ADT/StringSwitch.h"

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#include "llvm/Support/Threading.h"

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#include "llvm/Support/raw_ostream.h"

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#define DEBUGSERVER_BASENAME"debugserver" "debugserver"

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using namespace lldb;

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using namespace lldb_private;

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using namespace lldb_private::process_gdb_remote;

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LLDB_PLUGIN_DEFINE(ProcessGDBRemote)namespace lldb_private { void lldb_initialize_ProcessGDBRemote
() { ProcessGDBRemote::Initialize(); } void lldb_terminate_ProcessGDBRemote
() { ProcessGDBRemote::Terminate(); } }

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namespace lldb {

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// Provide a function that can easily dump the packet history if we know a

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// ProcessGDBRemote * value (which we can get from logs or from debugging). We

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// need the function in the lldb namespace so it makes it into the final

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// executable since the LLDB shared library only exports stuff in the lldb

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// namespace. This allows you to attach with a debugger and call this function

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// and get the packet history dumped to a file.

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void DumpProcessGDBRemotePacketHistory(void *p, const char *path) {

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auto file = FileSystem::Instance().Open(

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FileSpec(path), File::eOpenOptionWrite | File::eOpenOptionCanCreate);

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if (!file) {

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llvm::consumeError(file.takeError());

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return;

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}

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StreamFile stream(std::move(file.get()));

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((ProcessGDBRemote *)p)->GetGDBRemote().DumpHistory(stream);

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}

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} // namespace lldb

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namespace {

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#define LLDB_PROPERTIES_processgdbremote

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#include "ProcessGDBRemoteProperties.inc"

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enum {

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#define LLDB_PROPERTIES_processgdbremote

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#include "ProcessGDBRemotePropertiesEnum.inc"

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};

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class PluginProperties : public Properties {

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public:

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static ConstString GetSettingName() {

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return ProcessGDBRemote::GetPluginNameStatic();

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}

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PluginProperties() : Properties() {

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m_collection_sp = std::make_shared<OptionValueProperties>(GetSettingName());

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m_collection_sp->Initialize(g_processgdbremote_properties);

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}

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~PluginProperties() override = default;

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uint64_t GetPacketTimeout() {

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const uint32_t idx = ePropertyPacketTimeout;

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return m_collection_sp->GetPropertyAtIndexAsUInt64(

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nullptr, idx, g_processgdbremote_properties[idx].default_uint_value);

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}

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bool SetPacketTimeout(uint64_t timeout) {

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const uint32_t idx = ePropertyPacketTimeout;

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return m_collection_sp->SetPropertyAtIndexAsUInt64(nullptr, idx, timeout);

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}

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FileSpec GetTargetDefinitionFile() const {

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const uint32_t idx = ePropertyTargetDefinitionFile;

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return m_collection_sp->GetPropertyAtIndexAsFileSpec(nullptr, idx);

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}

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bool GetUseSVR4() const {

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const uint32_t idx = ePropertyUseSVR4;

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return m_collection_sp->GetPropertyAtIndexAsBoolean(

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nullptr, idx,

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g_processgdbremote_properties[idx].default_uint_value != 0);

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}

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bool GetUseGPacketForReading() const {

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const uint32_t idx = ePropertyUseGPacketForReading;

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return m_collection_sp->GetPropertyAtIndexAsBoolean(nullptr, idx, true);

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}

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};

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typedef std::shared_ptr<PluginProperties> ProcessKDPPropertiesSP;

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static const ProcessKDPPropertiesSP &GetGlobalPluginProperties() {

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static ProcessKDPPropertiesSP g_settings_sp;

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if (!g_settings_sp)

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g_settings_sp = std::make_shared<PluginProperties>();

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return g_settings_sp;

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}

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} // namespace

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// TODO Randomly assigning a port is unsafe. We should get an unused

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// ephemeral port from the kernel and make sure we reserve it before passing it

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// to debugserver.

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#if defined(__APPLE__)

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#define LOW_PORT(1024u) (IPPORT_RESERVED1024)

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#define HIGH_PORT(49151u) (IPPORT_HIFIRSTAUTO49152)

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#else

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#define LOW_PORT(1024u) (1024u)

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#define HIGH_PORT(49151u) (49151u)

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#endif

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ConstString ProcessGDBRemote::GetPluginNameStatic() {

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static ConstString g_name("gdb-remote");

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return g_name;

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}

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const char *ProcessGDBRemote::GetPluginDescriptionStatic() {

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return "GDB Remote protocol based debugging plug-in.";

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}

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void ProcessGDBRemote::Terminate() {

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PluginManager::UnregisterPlugin(ProcessGDBRemote::CreateInstance);

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}

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lldb::ProcessSP

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ProcessGDBRemote::CreateInstance(lldb::TargetSP target_sp,

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ListenerSP listener_sp,

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const FileSpec *crash_file_path,

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bool can_connect) {

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lldb::ProcessSP process_sp;

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if (crash_file_path == nullptr)

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process_sp = std::make_shared<ProcessGDBRemote>(target_sp, listener_sp);

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return process_sp;

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}

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std::chrono::seconds ProcessGDBRemote::GetPacketTimeout() {

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return std::chrono::seconds(GetGlobalPluginProperties()->GetPacketTimeout());

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}

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bool ProcessGDBRemote::CanDebug(lldb::TargetSP target_sp,

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bool plugin_specified_by_name) {

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if (plugin_specified_by_name)

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return true;

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// For now we are just making sure the file exists for a given module

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Module *exe_module = target_sp->GetExecutableModulePointer();

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if (exe_module) {

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ObjectFile *exe_objfile = exe_module->GetObjectFile();

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// We can't debug core files...

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switch (exe_objfile->GetType()) {

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case ObjectFile::eTypeInvalid:

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case ObjectFile::eTypeCoreFile:

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case ObjectFile::eTypeDebugInfo:

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case ObjectFile::eTypeObjectFile:

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case ObjectFile::eTypeSharedLibrary:

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case ObjectFile::eTypeStubLibrary:

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case ObjectFile::eTypeJIT:

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return false;

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case ObjectFile::eTypeExecutable:

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case ObjectFile::eTypeDynamicLinker:

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case ObjectFile::eTypeUnknown:

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break;

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}

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return FileSystem::Instance().Exists(exe_module->GetFileSpec());

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}

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// However, if there is no executable module, we return true since we might

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// be preparing to attach.

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return true;

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}

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// ProcessGDBRemote constructor

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ProcessGDBRemote::ProcessGDBRemote(lldb::TargetSP target_sp,

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ListenerSP listener_sp)

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: Process(target_sp, listener_sp),

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m_debugserver_pid(LLDB_INVALID_PROCESS_ID0), m_last_stop_packet_mutex(),

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m_register_info_sp(nullptr),

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m_async_broadcaster(nullptr, "lldb.process.gdb-remote.async-broadcaster"),

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m_async_listener_sp(

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Listener::MakeListener("lldb.process.gdb-remote.async-listener")),

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m_async_thread_state_mutex(), m_thread_ids(), m_thread_pcs(),

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m_jstopinfo_sp(), m_jthreadsinfo_sp(), m_continue_c_tids(),

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m_continue_C_tids(), m_continue_s_tids(), m_continue_S_tids(),

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m_max_memory_size(0), m_remote_stub_max_memory_size(0),

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m_addr_to_mmap_size(), m_thread_create_bp_sp(),

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m_waiting_for_attach(false), m_destroy_tried_resuming(false),

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m_command_sp(), m_breakpoint_pc_offset(0),

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m_initial_tid(LLDB_INVALID_THREAD_ID0), m_replay_mode(false),

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m_allow_flash_writes(false), m_erased_flash_ranges() {

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m_async_broadcaster.SetEventName(eBroadcastBitAsyncThreadShouldExit,

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"async thread should exit");

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m_async_broadcaster.SetEventName(eBroadcastBitAsyncContinue,

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"async thread continue");

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m_async_broadcaster.SetEventName(eBroadcastBitAsyncThreadDidExit,

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"async thread did exit");

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if (repro::Generator *g = repro::Reproducer::Instance().GetGenerator()) {

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repro::GDBRemoteProvider &provider =

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g->GetOrCreate<repro::GDBRemoteProvider>();

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m_gdb_comm.SetPacketRecorder(provider.GetNewPacketRecorder());

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}

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Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_ASYNC(1u << 11)));

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const uint32_t async_event_mask =

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eBroadcastBitAsyncContinue | eBroadcastBitAsyncThreadShouldExit;

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if (m_async_listener_sp->StartListeningForEvents(

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&m_async_broadcaster, async_event_mask) != async_event_mask) {

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LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s failed to listen for "
"m_async_broadcaster events", __FUNCTION__); } while (0)

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"ProcessGDBRemote::%s failed to listen for "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s failed to listen for "
"m_async_broadcaster events", __FUNCTION__); } while (0)

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"m_async_broadcaster events",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s failed to listen for "
"m_async_broadcaster events", __FUNCTION__); } while (0)

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__FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s failed to listen for "
"m_async_broadcaster events", __FUNCTION__); } while (0);

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}

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const uint32_t gdb_event_mask =

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Communication::eBroadcastBitReadThreadDidExit |

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GDBRemoteCommunication::eBroadcastBitGdbReadThreadGotNotify;

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if (m_async_listener_sp->StartListeningForEvents(

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&m_gdb_comm, gdb_event_mask) != gdb_event_mask) {

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LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s failed to listen for m_gdb_comm events"
, __FUNCTION__); } while (0)

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"ProcessGDBRemote::%s failed to listen for m_gdb_comm events",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s failed to listen for m_gdb_comm events"
, __FUNCTION__); } while (0)

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__FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s failed to listen for m_gdb_comm events"
, __FUNCTION__); } while (0);

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}

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const uint64_t timeout_seconds =

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GetGlobalPluginProperties()->GetPacketTimeout();

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if (timeout_seconds > 0)

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m_gdb_comm.SetPacketTimeout(std::chrono::seconds(timeout_seconds));

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m_use_g_packet_for_reading =

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GetGlobalPluginProperties()->GetUseGPacketForReading();

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}

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// Destructor

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ProcessGDBRemote::~ProcessGDBRemote() {

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// m_mach_process.UnregisterNotificationCallbacks (this);

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Clear();

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// We need to call finalize on the process before destroying ourselves to

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// make sure all of the broadcaster cleanup goes as planned. If we destruct

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// this class, then Process::~Process() might have problems trying to fully

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// destroy the broadcaster.

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Finalize();

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// The general Finalize is going to try to destroy the process and that

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// SHOULD shut down the async thread. However, if we don't kill it it will

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// get stranded and its connection will go away so when it wakes up it will

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// crash. So kill it for sure here.

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StopAsyncThread();

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KillDebugserverProcess();

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}

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// PluginInterface

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ConstString ProcessGDBRemote::GetPluginName() { return GetPluginNameStatic(); }

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uint32_t ProcessGDBRemote::GetPluginVersion() { return 1; }

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bool ProcessGDBRemote::ParsePythonTargetDefinition(

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const FileSpec &target_definition_fspec) {

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ScriptInterpreter *interpreter =

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GetTarget().GetDebugger().GetScriptInterpreter();

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Status error;

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StructuredData::ObjectSP module_object_sp(

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interpreter->LoadPluginModule(target_definition_fspec, error));

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if (module_object_sp) {

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StructuredData::DictionarySP target_definition_sp(

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interpreter->GetDynamicSettings(module_object_sp, &GetTarget(),

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"gdb-server-target-definition", error));

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if (target_definition_sp) {

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StructuredData::ObjectSP target_object(

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target_definition_sp->GetValueForKey("host-info"));

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if (target_object) {

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if (auto host_info_dict = target_object->GetAsDictionary()) {

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StructuredData::ObjectSP triple_value =

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host_info_dict->GetValueForKey("triple");

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if (auto triple_string_value = triple_value->GetAsString()) {

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std::string triple_string =

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std::string(triple_string_value->GetValue());

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ArchSpec host_arch(triple_string.c_str());

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if (!host_arch.IsCompatibleMatch(GetTarget().GetArchitecture())) {

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GetTarget().SetArchitecture(host_arch);

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}

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}

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}

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}

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m_breakpoint_pc_offset = 0;

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StructuredData::ObjectSP breakpoint_pc_offset_value =

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target_definition_sp->GetValueForKey("breakpoint-pc-offset");

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if (breakpoint_pc_offset_value) {

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if (auto breakpoint_pc_int_value =

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breakpoint_pc_offset_value->GetAsInteger())

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m_breakpoint_pc_offset = breakpoint_pc_int_value->GetValue();

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}

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if (m_register_info_sp->SetRegisterInfo(

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*target_definition_sp, GetTarget().GetArchitecture()) > 0) {

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return true;

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}

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}

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}

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return false;

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}

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static size_t SplitCommaSeparatedRegisterNumberString(

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const llvm::StringRef &comma_separated_regiter_numbers,

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std::vector<uint32_t> &regnums, int base) {

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regnums.clear();

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std::pair<llvm::StringRef, llvm::StringRef> value_pair;

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value_pair.second = comma_separated_regiter_numbers;

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do {

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value_pair = value_pair.second.split(',');

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if (!value_pair.first.empty()) {

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uint32_t reg = StringConvert::ToUInt32(value_pair.first.str().c_str(),

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LLDB_INVALID_REGNUM0xffffffffU, base);

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if (reg != LLDB_INVALID_REGNUM0xffffffffU)

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regnums.push_back(reg);

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}

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} while (!value_pair.second.empty());

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return regnums.size();

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}

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void ProcessGDBRemote::BuildDynamicRegisterInfo(bool force) {

403

if (!force && m_register_info_sp)

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return;

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m_register_info_sp = std::make_shared<GDBRemoteDynamicRegisterInfo>();

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// Check if qHostInfo specified a specific packet timeout for this

409

// connection. If so then lets update our setting so the user knows what the

410

// timeout is and can see it.

411

const auto host_packet_timeout = m_gdb_comm.GetHostDefaultPacketTimeout();

412

if (host_packet_timeout > std::chrono::seconds(0)) {

413

GetGlobalPluginProperties()->SetPacketTimeout(host_packet_timeout.count());

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}

415

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// Register info search order:

417

// 1 - Use the target definition python file if one is specified.

418

// 2 - If the target definition doesn't have any of the info from the

419

// target.xml (registers) then proceed to read the target.xml.

420

// 3 - Fall back on the qRegisterInfo packets.

421

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FileSpec target_definition_fspec =

423

GetGlobalPluginProperties()->GetTargetDefinitionFile();

424

if (!FileSystem::Instance().Exists(target_definition_fspec)) {

425

// If the filename doesn't exist, it may be a ~ not having been expanded -

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// try to resolve it.

427

FileSystem::Instance().Resolve(target_definition_fspec);

428

}

429

if (target_definition_fspec) {

430

// See if we can get register definitions from a python file

431

if (ParsePythonTargetDefinition(target_definition_fspec)) {

432

return;

433

} else {

434

StreamSP stream_sp = GetTarget().GetDebugger().GetAsyncOutputStream();

435

stream_sp->Printf("ERROR: target description file %s failed to parse.\n",

436

target_definition_fspec.GetPath().c_str());

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}

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}

439

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const ArchSpec &target_arch = GetTarget().GetArchitecture();

441

const ArchSpec &remote_host_arch = m_gdb_comm.GetHostArchitecture();

442

const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture();

443

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// Use the process' architecture instead of the host arch, if available

445

ArchSpec arch_to_use;

446

if (remote_process_arch.IsValid())

447

arch_to_use = remote_process_arch;

448

else

449

arch_to_use = remote_host_arch;

450

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if (!arch_to_use.IsValid())

452

arch_to_use = target_arch;

453

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if (GetGDBServerRegisterInfo(arch_to_use))

455

return;

456

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char packet[128];

458

uint32_t reg_offset = LLDB_INVALID_INDEX320xffffffffU;

459

uint32_t reg_num = 0;

460

for (StringExtractorGDBRemote::ResponseType response_type =

461

StringExtractorGDBRemote::eResponse;

462

response_type == StringExtractorGDBRemote::eResponse; ++reg_num) {

463

const int packet_len =

464

::snprintf(packet, sizeof(packet), "qRegisterInfo%x", reg_num);

465

assert(packet_len < (int)sizeof(packet))((void)0);

466

UNUSED_IF_ASSERT_DISABLED(packet_len)((void)(packet_len));

467

StringExtractorGDBRemote response;

468

if (m_gdb_comm.SendPacketAndWaitForResponse(packet, response) ==

469

GDBRemoteCommunication::PacketResult::Success) {

470

response_type = response.GetResponseType();

471

if (response_type == StringExtractorGDBRemote::eResponse) {

472

llvm::StringRef name;

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llvm::StringRef value;

474

ConstString reg_name;

475

ConstString alt_name;

476

ConstString set_name;

477

std::vector<uint32_t> value_regs;

478

std::vector<uint32_t> invalidate_regs;

479

std::vector<uint8_t> dwarf_opcode_bytes;

480

RegisterInfo reg_info = {

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nullptr, // Name

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nullptr, // Alt name

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0, // byte size

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reg_offset, // offset

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eEncodingUint, // encoding

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eFormatHex, // format

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{

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LLDB_INVALID_REGNUM0xffffffffU, // eh_frame reg num

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LLDB_INVALID_REGNUM0xffffffffU, // DWARF reg num

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LLDB_INVALID_REGNUM0xffffffffU, // generic reg num

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reg_num, // process plugin reg num

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reg_num // native register number

493

},

494

nullptr,

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nullptr,

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nullptr, // Dwarf expression opcode bytes pointer

497

0 // Dwarf expression opcode bytes length

498

};

499

500

while (response.GetNameColonValue(name, value)) {

501

if (name.equals("name")) {

502

reg_name.SetString(value);

503

} else if (name.equals("alt-name")) {

504

alt_name.SetString(value);

505

} else if (name.equals("bitsize")) {

506

value.getAsInteger(0, reg_info.byte_size);

507

reg_info.byte_size /= CHAR_BIT8;

508

} else if (name.equals("offset")) {

509

if (value.getAsInteger(0, reg_offset))

510

reg_offset = UINT32_MAX0xffffffffU;

511

} else if (name.equals("encoding")) {

512

const Encoding encoding = Args::StringToEncoding(value);

513

if (encoding != eEncodingInvalid)

514

reg_info.encoding = encoding;

515

} else if (name.equals("format")) {

516

Format format = eFormatInvalid;

517

if (OptionArgParser::ToFormat(value.str().c_str(), format, nullptr)

518

.Success())

519

reg_info.format = format;

520

else {

521

reg_info.format =

522

llvm::StringSwitch<Format>(value)

523

.Case("binary", eFormatBinary)

524

.Case("decimal", eFormatDecimal)

525

.Case("hex", eFormatHex)

526

.Case("float", eFormatFloat)

527

.Case("vector-sint8", eFormatVectorOfSInt8)

528

.Case("vector-uint8", eFormatVectorOfUInt8)

529

.Case("vector-sint16", eFormatVectorOfSInt16)

530

.Case("vector-uint16", eFormatVectorOfUInt16)

531

.Case("vector-sint32", eFormatVectorOfSInt32)

532

.Case("vector-uint32", eFormatVectorOfUInt32)

533

.Case("vector-float32", eFormatVectorOfFloat32)

534

.Case("vector-uint64", eFormatVectorOfUInt64)

535

.Case("vector-uint128", eFormatVectorOfUInt128)

536

.Default(eFormatInvalid);

537

}

538

} else if (name.equals("set")) {

539

set_name.SetString(value);

540

} else if (name.equals("gcc") || name.equals("ehframe")) {

541

if (value.getAsInteger(0, reg_info.kinds[eRegisterKindEHFrame]))

542

reg_info.kinds[eRegisterKindEHFrame] = LLDB_INVALID_REGNUM0xffffffffU;

543

} else if (name.equals("dwarf")) {

544

if (value.getAsInteger(0, reg_info.kinds[eRegisterKindDWARF]))

545

reg_info.kinds[eRegisterKindDWARF] = LLDB_INVALID_REGNUM0xffffffffU;

546

} else if (name.equals("generic")) {

547

reg_info.kinds[eRegisterKindGeneric] =

548

Args::StringToGenericRegister(value);

549

} else if (name.equals("container-regs")) {

550

SplitCommaSeparatedRegisterNumberString(value, value_regs, 16);

551

} else if (name.equals("invalidate-regs")) {

552

SplitCommaSeparatedRegisterNumberString(value, invalidate_regs, 16);

553

} else if (name.equals("dynamic_size_dwarf_expr_bytes")) {

554

size_t dwarf_opcode_len = value.size() / 2;

555

assert(dwarf_opcode_len > 0)((void)0);

556

557

dwarf_opcode_bytes.resize(dwarf_opcode_len);

558

reg_info.dynamic_size_dwarf_len = dwarf_opcode_len;

559

560

StringExtractor opcode_extractor(value);

561

uint32_t ret_val =

562

opcode_extractor.GetHexBytesAvail(dwarf_opcode_bytes);

563

assert(dwarf_opcode_len == ret_val)((void)0);

564

UNUSED_IF_ASSERT_DISABLED(ret_val)((void)(ret_val));

565

reg_info.dynamic_size_dwarf_expr_bytes = dwarf_opcode_bytes.data();

566

}

567

}

568

569

reg_info.byte_offset = reg_offset;

570

assert(reg_info.byte_size != 0)((void)0);

571

reg_offset = LLDB_INVALID_INDEX320xffffffffU;

572

if (!value_regs.empty()) {

573

value_regs.push_back(LLDB_INVALID_REGNUM0xffffffffU);

574

reg_info.value_regs = value_regs.data();

575

}

576

if (!invalidate_regs.empty()) {

577

invalidate_regs.push_back(LLDB_INVALID_REGNUM0xffffffffU);

578

reg_info.invalidate_regs = invalidate_regs.data();

579

}

580

581

reg_info.name = reg_name.AsCString();

582

// We have to make a temporary ABI here, and not use the GetABI because

583

// this code gets called in DidAttach, when the target architecture

584

// (and consequently the ABI we'll get from the process) may be wrong.

585

if (ABISP abi_sp = ABI::FindPlugin(shared_from_this(), arch_to_use))

586

abi_sp->AugmentRegisterInfo(reg_info);

587

588

m_register_info_sp->AddRegister(reg_info, reg_name, alt_name, set_name);

589

} else {

590

break; // ensure exit before reg_num is incremented

591

}

592

} else {

593

break;

594

}

595

}

596

597

if (m_register_info_sp->GetNumRegisters() > 0) {

598

m_register_info_sp->Finalize(GetTarget().GetArchitecture());

599

return;

600

}

601

602

// We didn't get anything if the accumulated reg_num is zero. See if we are

603

// debugging ARM and fill with a hard coded register set until we can get an

604

// updated debugserver down on the devices. On the other hand, if the

605

// accumulated reg_num is positive, see if we can add composite registers to

606

// the existing primordial ones.

607

bool from_scratch = (m_register_info_sp->GetNumRegisters() == 0);

608

609

if (!target_arch.IsValid()) {

610

if (arch_to_use.IsValid() &&

611

(arch_to_use.GetMachine() == llvm::Triple::arm ||

612

arch_to_use.GetMachine() == llvm::Triple::thumb) &&

613

arch_to_use.GetTriple().getVendor() == llvm::Triple::Apple)

614

m_register_info_sp->HardcodeARMRegisters(from_scratch);

615

} else if (target_arch.GetMachine() == llvm::Triple::arm ||

616

target_arch.GetMachine() == llvm::Triple::thumb) {

617

m_register_info_sp->HardcodeARMRegisters(from_scratch);

618

}

619

620

// At this point, we can finalize our register info.

621

m_register_info_sp->Finalize(GetTarget().GetArchitecture());

622

}

623

624

Status ProcessGDBRemote::WillLaunch(lldb_private::Module *module) {

625

return WillLaunchOrAttach();

626

}

627

628

Status ProcessGDBRemote::WillAttachToProcessWithID(lldb::pid_t pid) {

629

return WillLaunchOrAttach();

630

}

631

632

Status ProcessGDBRemote::WillAttachToProcessWithName(const char *process_name,

633

bool wait_for_launch) {

634

return WillLaunchOrAttach();

635

}

636

637

Status ProcessGDBRemote::DoConnectRemote(llvm::StringRef remote_url) {

638

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

639

Status error(WillLaunchOrAttach());

640

641

if (error.Fail())

642

return error;

643

644

if (repro::Reproducer::Instance().IsReplaying())

645

error = ConnectToReplayServer();

646

else

647

error = ConnectToDebugserver(remote_url);

648

649

if (error.Fail())

650

return error;

651

StartAsyncThread();

652

653

lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID();

654

if (pid == LLDB_INVALID_PROCESS_ID0) {

655

// We don't have a valid process ID, so note that we are connected and

656

// could now request to launch or attach, or get remote process listings...

657

SetPrivateState(eStateConnected);

658

} else {

659

// We have a valid process

660

SetID(pid);

661

GetThreadList();

662

StringExtractorGDBRemote response;

663

if (m_gdb_comm.GetStopReply(response)) {

664

SetLastStopPacket(response);

665

666

// '?' Packets must be handled differently in non-stop mode

667

if (GetTarget().GetNonStopModeEnabled())

668

HandleStopReplySequence();

669

670

Target &target = GetTarget();

671

if (!target.GetArchitecture().IsValid()) {

672

if (m_gdb_comm.GetProcessArchitecture().IsValid()) {

673

target.SetArchitecture(m_gdb_comm.GetProcessArchitecture());

674

} else {

675

if (m_gdb_comm.GetHostArchitecture().IsValid()) {

676

target.SetArchitecture(m_gdb_comm.GetHostArchitecture());

677

}

678

}

679

}

680

681

const StateType state = SetThreadStopInfo(response);

682

if (state != eStateInvalid) {

683

SetPrivateState(state);

684

} else

685

error.SetErrorStringWithFormat(

686

"Process %" PRIu64"llu" " was reported after connecting to "

687

"'%s', but state was not stopped: %s",

688

pid, remote_url.str().c_str(), StateAsCString(state));

689

} else

690

error.SetErrorStringWithFormat("Process %" PRIu64"llu"

691

" was reported after connecting to '%s', "

692

"but no stop reply packet was received",

693

pid, remote_url.str().c_str());

694

}

695

696

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

697

"ProcessGDBRemote::%s pid %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

698

": normalizing target architecture initial triple: %s "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

699

"(GetTarget().GetArchitecture().IsValid() %s, "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

700

"m_gdb_comm.GetHostArchitecture().IsValid(): %s)",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

701

__FUNCTION__, GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

702

GetTarget().GetArchitecture().GetTriple().getTriple().c_str(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

703

GetTarget().GetArchitecture().IsValid() ? "true" : "false",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0)

704

m_gdb_comm.GetHostArchitecture().IsValid() ? "true" : "false")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalizing target architecture initial triple: %s "
"(GetTarget().GetArchitecture().IsValid() %s, " "m_gdb_comm.GetHostArchitecture().IsValid(): %s)"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str(), GetTarget().GetArchitecture().IsValid
() ? "true" : "false", m_gdb_comm.GetHostArchitecture().IsValid
() ? "true" : "false"); } while (0);

705

706

if (error.Success() && !GetTarget().GetArchitecture().IsValid() &&

707

m_gdb_comm.GetHostArchitecture().IsValid()) {

708

// Prefer the *process'* architecture over that of the *host*, if

709

// available.

710

if (m_gdb_comm.GetProcessArchitecture().IsValid())

711

GetTarget().SetArchitecture(m_gdb_comm.GetProcessArchitecture());

712

else

713

GetTarget().SetArchitecture(m_gdb_comm.GetHostArchitecture());

714

}

715

716

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalized target architecture triple: %s"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str()); } while (0)

717

"ProcessGDBRemote::%s pid %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalized target architecture triple: %s"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str()); } while (0)

718

": normalized target architecture triple: %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalized target architecture triple: %s"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str()); } while (0)

719

__FUNCTION__, GetID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalized target architecture triple: %s"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str()); } while (0)

720

GetTarget().GetArchitecture().GetTriple().getTriple().c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s pid %" "llu" ": normalized target architecture triple: %s"
, __FUNCTION__, GetID(), GetTarget().GetArchitecture().GetTriple
().getTriple().c_str()); } while (0);

721

722

if (error.Success()) {

723

PlatformSP platform_sp = GetTarget().GetPlatform();

724

if (platform_sp && platform_sp->IsConnected())

725

SetUnixSignals(platform_sp->GetUnixSignals());

726

else

727

SetUnixSignals(UnixSignals::Create(GetTarget().GetArchitecture()));

728

}

729

730

return error;

731

}

732

733

Status ProcessGDBRemote::WillLaunchOrAttach() {

734

Status error;

735

m_stdio_communication.Clear();

736

return error;

737

}

738

739

// Process Control

740

Status ProcessGDBRemote::DoLaunch(lldb_private::Module *exe_module,

741

ProcessLaunchInfo &launch_info) {

742

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

743

Status error;

744

745

LLDB_LOGF(log, "ProcessGDBRemote::%s() entered", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s() entered", __FUNCTION__
); } while (0);

746

747

uint32_t launch_flags = launch_info.GetFlags().Get();

748

FileSpec stdin_file_spec{};

749

FileSpec stdout_file_spec{};

750

FileSpec stderr_file_spec{};

751

FileSpec working_dir = launch_info.GetWorkingDirectory();

752

753

const FileAction *file_action;

754

file_action = launch_info.GetFileActionForFD(STDIN_FILENO0);

755

if (file_action) {

756

if (file_action->GetAction() == FileAction::eFileActionOpen)

757

stdin_file_spec = file_action->GetFileSpec();

758

}

759

file_action = launch_info.GetFileActionForFD(STDOUT_FILENO1);

760

if (file_action) {

761

if (file_action->GetAction() == FileAction::eFileActionOpen)

762

stdout_file_spec = file_action->GetFileSpec();

763

}

764

file_action = launch_info.GetFileActionForFD(STDERR_FILENO2);

765

if (file_action) {

766

if (file_action->GetAction() == FileAction::eFileActionOpen)

767

stderr_file_spec = file_action->GetFileSpec();

768

}

769

770

if (log) {

771

if (stdin_file_spec || stdout_file_spec || stderr_file_spec)

772

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s provided with STDIO paths via "
"launch_info: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

773

"ProcessGDBRemote::%s provided with STDIO paths via "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s provided with STDIO paths via "
"launch_info: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

774

"launch_info: stdin=%s, stdout=%s, stderr=%s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s provided with STDIO paths via "
"launch_info: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

775

__FUNCTION__,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s provided with STDIO paths via "
"launch_info: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

776

stdin_file_spec ? stdin_file_spec.GetCString() : "<null>",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s provided with STDIO paths via "
"launch_info: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

777

stdout_file_spec ? stdout_file_spec.GetCString() : "<null>",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s provided with STDIO paths via "
"launch_info: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

778

stderr_file_spec ? stderr_file_spec.GetCString() : "<null>")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s provided with STDIO paths via "
"launch_info: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0);

779

else

780

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no STDIO paths given via launch_info"
, __FUNCTION__); } while (0)

781

"ProcessGDBRemote::%s no STDIO paths given via launch_info",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no STDIO paths given via launch_info"
, __FUNCTION__); } while (0)

782

__FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no STDIO paths given via launch_info"
, __FUNCTION__); } while (0);

783

}

784

785

const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0;

786

if (stdin_file_spec || disable_stdio) {

787

// the inferior will be reading stdin from the specified file or stdio is

788

// completely disabled

789

m_stdin_forward = false;

790

} else {

791

m_stdin_forward = true;

792

}

793

794

// ::LogSetBitMask (GDBR_LOG_DEFAULT);

795

// ::LogSetOptions (LLDB_LOG_OPTION_THREADSAFE |

796

// LLDB_LOG_OPTION_PREPEND_TIMESTAMP |

797

// LLDB_LOG_OPTION_PREPEND_PROC_AND_THREAD);

798

// ::LogSetLogFile ("/dev/stdout");

799

800

ObjectFile *object_file = exe_module->GetObjectFile();

801

if (object_file) {

802

error = EstablishConnectionIfNeeded(launch_info);

803

if (error.Success()) {

804

PseudoTerminal pty;

805

const bool disable_stdio = (launch_flags & eLaunchFlagDisableSTDIO) != 0;

806

807

PlatformSP platform_sp(GetTarget().GetPlatform());

808

if (disable_stdio) {

809

// set to /dev/null unless redirected to a file above

810

if (!stdin_file_spec)

811

stdin_file_spec.SetFile(FileSystem::DEV_NULL,

812

FileSpec::Style::native);

813

if (!stdout_file_spec)

814

stdout_file_spec.SetFile(FileSystem::DEV_NULL,

815

FileSpec::Style::native);

816

if (!stderr_file_spec)

817

stderr_file_spec.SetFile(FileSystem::DEV_NULL,

818

FileSpec::Style::native);

819

} else if (platform_sp && platform_sp->IsHost()) {

820

// If the debugserver is local and we aren't disabling STDIO, lets use

821

// a pseudo terminal to instead of relying on the 'O' packets for stdio

822

// since 'O' packets can really slow down debugging if the inferior

823

// does a lot of output.

824

if ((!stdin_file_spec || !stdout_file_spec || !stderr_file_spec) &&

825

!errorToBool(pty.OpenFirstAvailablePrimary(O_RDWR0x0002 | O_NOCTTY0x8000))) {

826

FileSpec secondary_name(pty.GetSecondaryName());

827

828

if (!stdin_file_spec)

829

stdin_file_spec = secondary_name;

830

831

if (!stdout_file_spec)

832

stdout_file_spec = secondary_name;

833

834

if (!stderr_file_spec)

835

stderr_file_spec = secondary_name;

836

}

837

LLDB_LOGF(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

838

log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

839

"ProcessGDBRemote::%s adjusted STDIO paths for local platform "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

840

"(IsHost() is true) using secondary: stdin=%s, stdout=%s, "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

841

"stderr=%s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

842

__FUNCTION__,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

843

stdin_file_spec ? stdin_file_spec.GetCString() : "<null>",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

844

stdout_file_spec ? stdout_file_spec.GetCString() : "<null>",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0)

845

stderr_file_spec ? stderr_file_spec.GetCString() : "<null>")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s adjusted STDIO paths for local platform "
"(IsHost() is true) using secondary: stdin=%s, stdout=%s, " "stderr=%s"
, __FUNCTION__, stdin_file_spec ? stdin_file_spec.GetCString(
) : "<null>", stdout_file_spec ? stdout_file_spec.GetCString
() : "<null>", stderr_file_spec ? stderr_file_spec.GetCString
() : "<null>"); } while (0);

846

}

847

848

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s final STDIO paths after all "
"adjustments: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

849

"ProcessGDBRemote::%s final STDIO paths after all "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s final STDIO paths after all "
"adjustments: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

850

"adjustments: stdin=%s, stdout=%s, stderr=%s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s final STDIO paths after all "
"adjustments: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

851

__FUNCTION__,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s final STDIO paths after all "
"adjustments: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

852

stdin_file_spec ? stdin_file_spec.GetCString() : "<null>",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s final STDIO paths after all "
"adjustments: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

853

stdout_file_spec ? stdout_file_spec.GetCString() : "<null>",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s final STDIO paths after all "
"adjustments: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0)

854

stderr_file_spec ? stderr_file_spec.GetCString() : "<null>")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s final STDIO paths after all "
"adjustments: stdin=%s, stdout=%s, stderr=%s", __FUNCTION__,
stdin_file_spec ? stdin_file_spec.GetCString() : "<null>"
, stdout_file_spec ? stdout_file_spec.GetCString() : "<null>"
, stderr_file_spec ? stderr_file_spec.GetCString() : "<null>"
); } while (0);

855

856

if (stdin_file_spec)

857

m_gdb_comm.SetSTDIN(stdin_file_spec);

858

if (stdout_file_spec)

859

m_gdb_comm.SetSTDOUT(stdout_file_spec);

860

if (stderr_file_spec)

861

m_gdb_comm.SetSTDERR(stderr_file_spec);

862

863

m_gdb_comm.SetDisableASLR(launch_flags & eLaunchFlagDisableASLR);

864

m_gdb_comm.SetDetachOnError(launch_flags & eLaunchFlagDetachOnError);

865

866

m_gdb_comm.SendLaunchArchPacket(

867

GetTarget().GetArchitecture().GetArchitectureName());

868

869

const char *launch_event_data = launch_info.GetLaunchEventData();

870

if (launch_event_data != nullptr && *launch_event_data != '\0')

871

m_gdb_comm.SendLaunchEventDataPacket(launch_event_data);

872

873

if (working_dir) {

874

m_gdb_comm.SetWorkingDir(working_dir);

875

}

876

877

// Send the environment and the program + arguments after we connect

878

m_gdb_comm.SendEnvironment(launch_info.GetEnvironment());

879

880

{

881

// Scope for the scoped timeout object

882

GDBRemoteCommunication::ScopedTimeout timeout(m_gdb_comm,

883

std::chrono::seconds(10));

884

885

int arg_packet_err = m_gdb_comm.SendArgumentsPacket(launch_info);

886

if (arg_packet_err == 0) {

887

std::string error_str;

888

if (m_gdb_comm.GetLaunchSuccess(error_str)) {

889

SetID(m_gdb_comm.GetCurrentProcessID());

890

} else {

891

error.SetErrorString(error_str.c_str());

892

}

893

} else {

894

error.SetErrorStringWithFormat("'A' packet returned an error: %i",

895

arg_packet_err);

896

}

897

}

898

899

if (GetID() == LLDB_INVALID_PROCESS_ID0) {

900

LLDB_LOGF(log, "failed to connect to debugserver: %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("failed to connect to debugserver: %s"
, error.AsCString()); } while (0)

901

error.AsCString())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("failed to connect to debugserver: %s"
, error.AsCString()); } while (0);

902

KillDebugserverProcess();

903

return error;

904

}

905

906

StringExtractorGDBRemote response;

907

if (m_gdb_comm.GetStopReply(response)) {

908

SetLastStopPacket(response);

909

// '?' Packets must be handled differently in non-stop mode

910

if (GetTarget().GetNonStopModeEnabled())

911

HandleStopReplySequence();

912

913

const ArchSpec &process_arch = m_gdb_comm.GetProcessArchitecture();

914

915

if (process_arch.IsValid()) {

916

GetTarget().MergeArchitecture(process_arch);

917

} else {

918

const ArchSpec &host_arch = m_gdb_comm.GetHostArchitecture();

919

if (host_arch.IsValid())

920

GetTarget().MergeArchitecture(host_arch);

921

}

922

923

SetPrivateState(SetThreadStopInfo(response));

924

925

if (!disable_stdio) {

926

if (pty.GetPrimaryFileDescriptor() != PseudoTerminal::invalid_fd)

927

SetSTDIOFileDescriptor(pty.ReleasePrimaryFileDescriptor());

928

}

929

}

930

} else {

931

LLDB_LOGF(log, "failed to connect to debugserver: %s", error.AsCString())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("failed to connect to debugserver: %s"
, error.AsCString()); } while (0);

932

}

933

} else {

934

// Set our user ID to an invalid process ID.

935

SetID(LLDB_INVALID_PROCESS_ID0);

936

error.SetErrorStringWithFormat(

937

"failed to get object file from '%s' for arch %s",

938

exe_module->GetFileSpec().GetFilename().AsCString(),

939

exe_module->GetArchitecture().GetArchitectureName());

940

}

941

return error;

942

}

943

944

Status ProcessGDBRemote::ConnectToDebugserver(llvm::StringRef connect_url) {

945

Status error;

946

// Only connect if we have a valid connect URL

947

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

948

949

if (!connect_url.empty()) {

950

LLDB_LOGF(log, "ProcessGDBRemote::%s Connecting to %s", __FUNCTION__,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s Connecting to %s"
, __FUNCTION__, connect_url.str().c_str()); } while (0)

951

connect_url.str().c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s Connecting to %s"
, __FUNCTION__, connect_url.str().c_str()); } while (0);

952

std::unique_ptr<ConnectionFileDescriptor> conn_up(

953

new ConnectionFileDescriptor());

954

if (conn_up) {

955

const uint32_t max_retry_count = 50;

956

uint32_t retry_count = 0;

957

while (!m_gdb_comm.IsConnected()) {

958

if (conn_up->Connect(connect_url, &error) == eConnectionStatusSuccess) {

959

m_gdb_comm.SetConnection(std::move(conn_up));

960

break;

961

} else if (error.WasInterrupted()) {

962

// If we were interrupted, don't keep retrying.

963

break;

964

}

965

966

retry_count++;

967

968

if (retry_count >= max_retry_count)

969

break;

970

971

std::this_thread::sleep_for(std::chrono::milliseconds(100));

972

}

973

}

974

}

975

976

if (!m_gdb_comm.IsConnected()) {

977

if (error.Success())

978

error.SetErrorString("not connected to remote gdb server");

979

return error;

980

}

981

982

// Start the communications read thread so all incoming data can be parsed

983

// into packets and queued as they arrive.

984

if (GetTarget().GetNonStopModeEnabled())

985

m_gdb_comm.StartReadThread();

986

987

// We always seem to be able to open a connection to a local port so we need

988

// to make sure we can then send data to it. If we can't then we aren't

989

// actually connected to anything, so try and do the handshake with the

990

// remote GDB server and make sure that goes alright.

991

if (!m_gdb_comm.HandshakeWithServer(&error)) {

992

m_gdb_comm.Disconnect();

993

if (error.Success())

994

error.SetErrorString("not connected to remote gdb server");

995

return error;

996

}

997

998

// Send $QNonStop:1 packet on startup if required

999

if (GetTarget().GetNonStopModeEnabled())

1000

GetTarget().SetNonStopModeEnabled(m_gdb_comm.SetNonStopMode(true));

1001

1002

m_gdb_comm.GetEchoSupported();

1003

m_gdb_comm.GetThreadSuffixSupported();

1004

m_gdb_comm.GetListThreadsInStopReplySupported();

1005

m_gdb_comm.GetHostInfo();

1006

m_gdb_comm.GetVContSupported('c');

1007

m_gdb_comm.GetVAttachOrWaitSupported();

1008

m_gdb_comm.EnableErrorStringInPacket();

1009

1010

// Ask the remote server for the default thread id

1011

if (GetTarget().GetNonStopModeEnabled())

1012

m_gdb_comm.GetDefaultThreadId(m_initial_tid);

1013

1014

size_t num_cmds = GetExtraStartupCommands().GetArgumentCount();

1015

for (size_t idx = 0; idx < num_cmds; idx++) {

1016

StringExtractorGDBRemote response;

1017

m_gdb_comm.SendPacketAndWaitForResponse(

1018

GetExtraStartupCommands().GetArgumentAtIndex(idx), response);

1019

}

1020

return error;

1021

}

1022

1023

void ProcessGDBRemote::DidLaunchOrAttach(ArchSpec &process_arch) {

1024

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

1025

BuildDynamicRegisterInfo(false);

1026

1027

// See if the GDB server supports qHostInfo or qProcessInfo packets. Prefer

1028

// qProcessInfo as it will be more specific to our process.

1029

1030

const ArchSpec &remote_process_arch = m_gdb_comm.GetProcessArchitecture();

1031

if (remote_process_arch.IsValid()) {

1032

process_arch = remote_process_arch;

1033

LLDB_LOG(log, "gdb-remote had process architecture, using {0} {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote had process architecture, using {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0)

1034

process_arch.GetArchitectureName(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote had process architecture, using {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0)

1035

process_arch.GetTriple().getTriple())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote had process architecture, using {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0);

1036

} else {

1037

process_arch = m_gdb_comm.GetHostArchitecture();

1038

LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote did not have process architecture, using gdb-remote "
"host architecture {0} {1}", process_arch.GetArchitectureName
(), process_arch.GetTriple().getTriple()); } while (0)

1039

"gdb-remote did not have process architecture, using gdb-remote "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote did not have process architecture, using gdb-remote "
"host architecture {0} {1}", process_arch.GetArchitectureName
(), process_arch.GetTriple().getTriple()); } while (0)

1040

"host architecture {0} {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote did not have process architecture, using gdb-remote "
"host architecture {0} {1}", process_arch.GetArchitectureName
(), process_arch.GetTriple().getTriple()); } while (0)

1041

process_arch.GetArchitectureName(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote did not have process architecture, using gdb-remote "
"host architecture {0} {1}", process_arch.GetArchitectureName
(), process_arch.GetTriple().getTriple()); } while (0)

1042

process_arch.GetTriple().getTriple())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "gdb-remote did not have process architecture, using gdb-remote "
"host architecture {0} {1}", process_arch.GetArchitectureName
(), process_arch.GetTriple().getTriple()); } while (0);

1043

}

1044

1045

if (int addresssable_bits = m_gdb_comm.GetAddressingBits()) {

1046

lldb::addr_t address_mask = ~((1ULL << addresssable_bits) - 1);

1047

SetCodeAddressMask(address_mask);

1048

SetDataAddressMask(address_mask);

1049

}

1050

1051

if (process_arch.IsValid()) {

1052

const ArchSpec &target_arch = GetTarget().GetArchitecture();

1053

if (target_arch.IsValid()) {

1054

LLDB_LOG(log, "analyzing target arch, currently {0} {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "analyzing target arch, currently {0} {1}", target_arch
.GetArchitectureName(), target_arch.GetTriple().getTriple());
} while (0)

1055

target_arch.GetArchitectureName(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "analyzing target arch, currently {0} {1}", target_arch
.GetArchitectureName(), target_arch.GetTriple().getTriple());
} while (0)

1056

target_arch.GetTriple().getTriple())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "analyzing target arch, currently {0} {1}", target_arch
.GetArchitectureName(), target_arch.GetTriple().getTriple());
} while (0);

1057

1058

// If the remote host is ARM and we have apple as the vendor, then

1059

// ARM executables and shared libraries can have mixed ARM

1060

// architectures.

1061

// You can have an armv6 executable, and if the host is armv7, then the

1062

// system will load the best possible architecture for all shared

1063

// libraries it has, so we really need to take the remote host

1064

// architecture as our defacto architecture in this case.

1065

1066

if ((process_arch.GetMachine() == llvm::Triple::arm ||

1067

process_arch.GetMachine() == llvm::Triple::thumb) &&

1068

process_arch.GetTriple().getVendor() == llvm::Triple::Apple) {

1069

GetTarget().SetArchitecture(process_arch);

1070

LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "remote process is ARM/Apple, " "setting target arch to {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0)

1071

"remote process is ARM/Apple, "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "remote process is ARM/Apple, " "setting target arch to {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0)

1072

"setting target arch to {0} {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "remote process is ARM/Apple, " "setting target arch to {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0)

1073

process_arch.GetArchitectureName(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "remote process is ARM/Apple, " "setting target arch to {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0)

1074

process_arch.GetTriple().getTriple())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "remote process is ARM/Apple, " "setting target arch to {0} {1}"
, process_arch.GetArchitectureName(), process_arch.GetTriple(
).getTriple()); } while (0);

1075

} else {

1076

// Fill in what is missing in the triple

1077

const llvm::Triple &remote_triple = process_arch.GetTriple();

1078

llvm::Triple new_target_triple = target_arch.GetTriple();

1079

if (new_target_triple.getVendorName().size() == 0) {

1080

new_target_triple.setVendor(remote_triple.getVendor());

1081

1082

if (new_target_triple.getOSName().size() == 0) {

1083

new_target_triple.setOS(remote_triple.getOS());

1084

1085

if (new_target_triple.getEnvironmentName().size() == 0)

1086

new_target_triple.setEnvironment(remote_triple.getEnvironment());

1087

}

1088

1089

ArchSpec new_target_arch = target_arch;

1090

new_target_arch.SetTriple(new_target_triple);

1091

GetTarget().SetArchitecture(new_target_arch);

1092

}

1093

}

1094

1095

LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "final target arch after adjustments for remote architecture: "
"{0} {1}", target_arch.GetArchitectureName(), target_arch.GetTriple
().getTriple()); } while (0)

1096

"final target arch after adjustments for remote architecture: "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "final target arch after adjustments for remote architecture: "
"{0} {1}", target_arch.GetArchitectureName(), target_arch.GetTriple
().getTriple()); } while (0)

1097

"{0} {1}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "final target arch after adjustments for remote architecture: "
"{0} {1}", target_arch.GetArchitectureName(), target_arch.GetTriple
().getTriple()); } while (0)

1098

target_arch.GetArchitectureName(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "final target arch after adjustments for remote architecture: "
"{0} {1}", target_arch.GetArchitectureName(), target_arch.GetTriple
().getTriple()); } while (0)

1099

target_arch.GetTriple().getTriple())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "final target arch after adjustments for remote architecture: "
"{0} {1}", target_arch.GetArchitectureName(), target_arch.GetTriple
().getTriple()); } while (0);

1100

} else {

1101

// The target doesn't have a valid architecture yet, set it from the

1102

// architecture we got from the remote GDB server

1103

GetTarget().SetArchitecture(process_arch);

1104

}

1105

}

1106

1107

MaybeLoadExecutableModule();

1108

1109

// Find out which StructuredDataPlugins are supported by the debug monitor.

1110

// These plugins transmit data over async $J packets.

1111

if (StructuredData::Array *supported_packets =

1112

m_gdb_comm.GetSupportedStructuredDataPlugins())

1113

MapSupportedStructuredDataPlugins(*supported_packets);

1114

}

1115

1116

void ProcessGDBRemote::MaybeLoadExecutableModule() {

1117

ModuleSP module_sp = GetTarget().GetExecutableModule();

1118

if (!module_sp)

1119

return;

1120

1121

llvm::Optional<QOffsets> offsets = m_gdb_comm.GetQOffsets();

1122

if (!offsets)

1123

return;

1124

1125

bool is_uniform =

1126

size_t(llvm::count(offsets->offsets, offsets->offsets[0])) ==

1127

offsets->offsets.size();

1128

if (!is_uniform)

1129

return; // TODO: Handle non-uniform responses.

1130

1131

bool changed = false;

1132

module_sp->SetLoadAddress(GetTarget(), offsets->offsets[0],

1133

/*value_is_offset=*/true, changed);

1134

if (changed) {

1135

ModuleList list;

1136

list.Append(module_sp);

1137

m_process->GetTarget().ModulesDidLoad(list);

1138

}

1139

}

1140

1141

void ProcessGDBRemote::DidLaunch() {

1142

ArchSpec process_arch;

1143

DidLaunchOrAttach(process_arch);

1144

}

1145

1146

Status ProcessGDBRemote::DoAttachToProcessWithID(

1147

lldb::pid_t attach_pid, const ProcessAttachInfo &attach_info) {

1148

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

1149

Status error;

1150

1151

LLDB_LOGF(log, "ProcessGDBRemote::%s()", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s()", __FUNCTION__
); } while (0);

1152

1153

// Clear out and clean up from any current state

1154

Clear();

1155

if (attach_pid != LLDB_INVALID_PROCESS_ID0) {

1156

error = EstablishConnectionIfNeeded(attach_info);

1157

if (error.Success()) {

1158

m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError());

1159

1160

char packet[64];

1161

const int packet_len =

1162

::snprintf(packet, sizeof(packet), "vAttach;%" PRIx64"llx", attach_pid);

1163

SetID(attach_pid);

1164

m_async_broadcaster.BroadcastEvent(

1165

eBroadcastBitAsyncContinue, new EventDataBytes(packet, packet_len));

1166

} else

1167

SetExitStatus(-1, error.AsCString());

1168

}

1169

1170

return error;

1171

}

1172

1173

Status ProcessGDBRemote::DoAttachToProcessWithName(

1174

const char *process_name, const ProcessAttachInfo &attach_info) {

1175

Status error;

1176

// Clear out and clean up from any current state

1177

Clear();

1178

1179

if (process_name && process_name[0]) {

1180

error = EstablishConnectionIfNeeded(attach_info);

1181

if (error.Success()) {

1182

StreamString packet;

1183

1184

m_gdb_comm.SetDetachOnError(attach_info.GetDetachOnError());

1185

1186

if (attach_info.GetWaitForLaunch()) {

1187

if (!m_gdb_comm.GetVAttachOrWaitSupported()) {

1188

packet.PutCString("vAttachWait");

1189

} else {

1190

if (attach_info.GetIgnoreExisting())

1191

packet.PutCString("vAttachWait");

1192

else

1193

packet.PutCString("vAttachOrWait");

1194

}

1195

} else

1196

packet.PutCString("vAttachName");

1197

packet.PutChar(';');

1198

packet.PutBytesAsRawHex8(process_name, strlen(process_name),

1199

endian::InlHostByteOrder(),

1200

endian::InlHostByteOrder());

1201

1202

m_async_broadcaster.BroadcastEvent(

1203

eBroadcastBitAsyncContinue,

1204

new EventDataBytes(packet.GetString().data(), packet.GetSize()));

1205

1206

} else

1207

SetExitStatus(-1, error.AsCString());

1208

}

1209

return error;

1210

}

1211

1212

llvm::Expected<TraceSupportedResponse> ProcessGDBRemote::TraceSupported() {

1213

return m_gdb_comm.SendTraceSupported(GetInterruptTimeout());

1214

}

1215

1216

llvm::Error ProcessGDBRemote::TraceStop(const TraceStopRequest &request) {

1217

return m_gdb_comm.SendTraceStop(request, GetInterruptTimeout());

1218

}

1219

1220

llvm::Error ProcessGDBRemote::TraceStart(const llvm::json::Value &request) {

1221

return m_gdb_comm.SendTraceStart(request, GetInterruptTimeout());

1222

}

1223

1224

llvm::Expected<std::string>

1225

ProcessGDBRemote::TraceGetState(llvm::StringRef type) {

1226

return m_gdb_comm.SendTraceGetState(type, GetInterruptTimeout());

1227

}

1228

1229

llvm::Expected<std::vector<uint8_t>>

1230

ProcessGDBRemote::TraceGetBinaryData(const TraceGetBinaryDataRequest &request) {

1231

return m_gdb_comm.SendTraceGetBinaryData(request, GetInterruptTimeout());

1232

}

1233

1234

void ProcessGDBRemote::DidExit() {

1235

// When we exit, disconnect from the GDB server communications

1236

m_gdb_comm.Disconnect();

1237

}

1238

1239

void ProcessGDBRemote::DidAttach(ArchSpec &process_arch) {

1240

// If you can figure out what the architecture is, fill it in here.

1241

process_arch.Clear();

1242

DidLaunchOrAttach(process_arch);

1243

}

1244

1245

Status ProcessGDBRemote::WillResume() {

1246

m_continue_c_tids.clear();

1247

m_continue_C_tids.clear();

1248

m_continue_s_tids.clear();

1249

m_continue_S_tids.clear();

1250

m_jstopinfo_sp.reset();

1251

m_jthreadsinfo_sp.reset();

1252

return Status();

1253

}

1254

1255

Status ProcessGDBRemote::DoResume() {

1256

Status error;

1257

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

1258

LLDB_LOGF(log, "ProcessGDBRemote::Resume()")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::Resume()"); } while
(0);

1259

1260

ListenerSP listener_sp(

1261

Listener::MakeListener("gdb-remote.resume-packet-sent"));

1262

if (listener_sp->StartListeningForEvents(

1263

&m_gdb_comm, GDBRemoteCommunication::eBroadcastBitRunPacketSent)) {

1264

listener_sp->StartListeningForEvents(

1265

&m_async_broadcaster,

1266

ProcessGDBRemote::eBroadcastBitAsyncThreadDidExit);

1267

1268

const size_t num_threads = GetThreadList().GetSize();

1269

1270

StreamString continue_packet;

1271

bool continue_packet_error = false;

1272

if (m_gdb_comm.HasAnyVContSupport()) {

1273

if (!GetTarget().GetNonStopModeEnabled() &&

1274

(m_continue_c_tids.size() == num_threads ||

1275

(m_continue_c_tids.empty() && m_continue_C_tids.empty() &&

1276

m_continue_s_tids.empty() && m_continue_S_tids.empty()))) {

1277

// All threads are continuing, just send a "c" packet

1278

continue_packet.PutCString("c");

1279

} else {

1280

continue_packet.PutCString("vCont");

1281

1282

if (!m_continue_c_tids.empty()) {

1283

if (m_gdb_comm.GetVContSupported('c')) {

1284

for (tid_collection::const_iterator

1285

t_pos = m_continue_c_tids.begin(),

1286

t_end = m_continue_c_tids.end();

1287

t_pos != t_end; ++t_pos)

1288

continue_packet.Printf(";c:%4.4" PRIx64"llx", *t_pos);

1289

} else

1290

continue_packet_error = true;

1291

}

1292

1293

if (!continue_packet_error && !m_continue_C_tids.empty()) {

1294

if (m_gdb_comm.GetVContSupported('C')) {

1295

for (tid_sig_collection::const_iterator

1296

s_pos = m_continue_C_tids.begin(),

1297

s_end = m_continue_C_tids.end();

1298

s_pos != s_end; ++s_pos)

1299

continue_packet.Printf(";C%2.2x:%4.4" PRIx64"llx", s_pos->second,

1300

s_pos->first);

1301

} else

1302

continue_packet_error = true;

1303

}

1304

1305

if (!continue_packet_error && !m_continue_s_tids.empty()) {

1306

if (m_gdb_comm.GetVContSupported('s')) {

1307

for (tid_collection::const_iterator

1308

t_pos = m_continue_s_tids.begin(),

1309

t_end = m_continue_s_tids.end();

1310

t_pos != t_end; ++t_pos)

1311

continue_packet.Printf(";s:%4.4" PRIx64"llx", *t_pos);

1312

} else

1313

continue_packet_error = true;

1314

}

1315

1316

if (!continue_packet_error && !m_continue_S_tids.empty()) {

1317

if (m_gdb_comm.GetVContSupported('S')) {

1318

for (tid_sig_collection::const_iterator

1319

s_pos = m_continue_S_tids.begin(),

1320

s_end = m_continue_S_tids.end();

1321

s_pos != s_end; ++s_pos)

1322

continue_packet.Printf(";S%2.2x:%4.4" PRIx64"llx", s_pos->second,

1323

s_pos->first);

1324

} else

1325

continue_packet_error = true;

1326

}

1327

1328

if (continue_packet_error)

1329

continue_packet.Clear();

1330

}

1331

} else

1332

continue_packet_error = true;

1333

1334

if (continue_packet_error) {

1335

// Either no vCont support, or we tried to use part of the vCont packet

1336

// that wasn't supported by the remote GDB server. We need to try and

1337

// make a simple packet that can do our continue

1338

const size_t num_continue_c_tids = m_continue_c_tids.size();

1339

const size_t num_continue_C_tids = m_continue_C_tids.size();

1340

const size_t num_continue_s_tids = m_continue_s_tids.size();

1341

const size_t num_continue_S_tids = m_continue_S_tids.size();

1342

if (num_continue_c_tids > 0) {

1343

if (num_continue_c_tids == num_threads) {

1344

// All threads are resuming...

1345

m_gdb_comm.SetCurrentThreadForRun(-1);

1346

continue_packet.PutChar('c');

1347

continue_packet_error = false;

1348

} else if (num_continue_c_tids == 1 && num_continue_C_tids == 0 &&

1349

num_continue_s_tids == 0 && num_continue_S_tids == 0) {

1350

// Only one thread is continuing

1351

m_gdb_comm.SetCurrentThreadForRun(m_continue_c_tids.front());

1352

continue_packet.PutChar('c');

1353

continue_packet_error = false;

1354

}

1355

}

1356

1357

if (continue_packet_error && num_continue_C_tids > 0) {

1358

if ((num_continue_C_tids + num_continue_c_tids) == num_threads &&

1359

num_continue_C_tids > 0 && num_continue_s_tids == 0 &&

1360

num_continue_S_tids == 0) {

1361

const int continue_signo = m_continue_C_tids.front().second;

1362

// Only one thread is continuing

1363

if (num_continue_C_tids > 1) {

1364

// More that one thread with a signal, yet we don't have vCont

1365

// support and we are being asked to resume each thread with a

1366

// signal, we need to make sure they are all the same signal, or we

1367

// can't issue the continue accurately with the current support...

1368

if (num_continue_C_tids > 1) {

1369

continue_packet_error = false;

1370

for (size_t i = 1; i < m_continue_C_tids.size(); ++i) {

1371

if (m_continue_C_tids[i].second != continue_signo)

1372

continue_packet_error = true;

1373

}

1374

}

1375

if (!continue_packet_error)

1376

m_gdb_comm.SetCurrentThreadForRun(-1);

1377

} else {

1378

// Set the continue thread ID

1379

continue_packet_error = false;

1380

m_gdb_comm.SetCurrentThreadForRun(m_continue_C_tids.front().first);

1381

}

1382

if (!continue_packet_error) {

1383

// Add threads continuing with the same signo...

1384

continue_packet.Printf("C%2.2x", continue_signo);

1385

}

1386

}

1387

}

1388

1389

if (continue_packet_error && num_continue_s_tids > 0) {

1390

if (num_continue_s_tids == num_threads) {

1391

// All threads are resuming...

1392

m_gdb_comm.SetCurrentThreadForRun(-1);

1393

1394

// If in Non-Stop-Mode use vCont when stepping

1395

if (GetTarget().GetNonStopModeEnabled()) {

1396

if (m_gdb_comm.GetVContSupported('s'))

1397

continue_packet.PutCString("vCont;s");

1398

else

1399

continue_packet.PutChar('s');

1400

} else

1401

continue_packet.PutChar('s');

1402

1403

continue_packet_error = false;

1404

} else if (num_continue_c_tids == 0 && num_continue_C_tids == 0 &&

1405

num_continue_s_tids == 1 && num_continue_S_tids == 0) {

1406

// Only one thread is stepping

1407

m_gdb_comm.SetCurrentThreadForRun(m_continue_s_tids.front());

1408

continue_packet.PutChar('s');

1409

continue_packet_error = false;

1410

}

1411

}

1412

1413

if (!continue_packet_error && num_continue_S_tids > 0) {

1414

if (num_continue_S_tids == num_threads) {

1415

const int step_signo = m_continue_S_tids.front().second;

1416

// Are all threads trying to step with the same signal?

1417

continue_packet_error = false;

1418

if (num_continue_S_tids > 1) {

1419

for (size_t i = 1; i < num_threads; ++i) {

1420

if (m_continue_S_tids[i].second != step_signo)

1421

continue_packet_error = true;

1422

}

1423

}

1424

if (!continue_packet_error) {

1425

// Add threads stepping with the same signo...

1426

m_gdb_comm.SetCurrentThreadForRun(-1);

1427

continue_packet.Printf("S%2.2x", step_signo);

1428

}

1429

} else if (num_continue_c_tids == 0 && num_continue_C_tids == 0 &&

1430

num_continue_s_tids == 0 && num_continue_S_tids == 1) {

1431

// Only one thread is stepping with signal

1432

m_gdb_comm.SetCurrentThreadForRun(m_continue_S_tids.front().first);

1433

continue_packet.Printf("S%2.2x", m_continue_S_tids.front().second);

1434

continue_packet_error = false;

1435

}

1436

}

1437

}

1438

1439

if (continue_packet_error) {

1440

error.SetErrorString("can't make continue packet for this resume");

1441

} else {

1442

EventSP event_sp;

1443

if (!m_async_thread.IsJoinable()) {

1444

error.SetErrorString("Trying to resume but the async thread is dead.");

1445

LLDB_LOGF(log, "ProcessGDBRemote::DoResume: Trying to resume but the "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoResume: Trying to resume but the "
"async thread is dead."); } while (0)

1446

"async thread is dead.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoResume: Trying to resume but the "
"async thread is dead."); } while (0);

1447

return error;

1448

}

1449

1450

m_async_broadcaster.BroadcastEvent(

1451

eBroadcastBitAsyncContinue,

1452

new EventDataBytes(continue_packet.GetString().data(),

1453

continue_packet.GetSize()));

1454

1455

if (!listener_sp->GetEvent(event_sp, std::chrono::seconds(5))) {

1456

error.SetErrorString("Resume timed out.");

1457

LLDB_LOGF(log, "ProcessGDBRemote::DoResume: Resume timed out.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoResume: Resume timed out."
); } while (0);

1458

} else if (event_sp->BroadcasterIs(&m_async_broadcaster)) {

1459

error.SetErrorString("Broadcast continue, but the async thread was "

1460

"killed before we got an ack back.");

1461

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoResume: Broadcast continue, but the "
"async thread was killed before we got an ack back."); } while
(0)

1462

"ProcessGDBRemote::DoResume: Broadcast continue, but the "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoResume: Broadcast continue, but the "
"async thread was killed before we got an ack back."); } while
(0)

1463

"async thread was killed before we got an ack back.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoResume: Broadcast continue, but the "
"async thread was killed before we got an ack back."); } while
(0);

1464

return error;

1465

}

1466

}

1467

}

1468

1469

return error;

1470

}

1471

1472

void ProcessGDBRemote::HandleStopReplySequence() {

1473

while (true) {

1474

// Send vStopped

1475

StringExtractorGDBRemote response;

1476

m_gdb_comm.SendPacketAndWaitForResponse("vStopped", response);

1477

1478

// OK represents end of signal list

1479

if (response.IsOKResponse())

1480

break;

1481

1482

// If not OK or a normal packet we have a problem

1483

if (!response.IsNormalResponse())

1484

break;

1485

1486

SetLastStopPacket(response);

1487

}

1488

}

1489

1490

void ProcessGDBRemote::ClearThreadIDList() {

1491

std::lock_guard<std::recursive_mutex> guard(m_thread_list_real.GetMutex());

1492

m_thread_ids.clear();

1493

m_thread_pcs.clear();

1494

}

1495

1496

size_t ProcessGDBRemote::UpdateThreadIDsFromStopReplyThreadsValue(

1497

llvm::StringRef value) {

1498

m_thread_ids.clear();

1499

lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID();

1500

StringExtractorGDBRemote thread_ids{value};

1501

1502

do {

1503

auto pid_tid = thread_ids.GetPidTid(pid);

1504

if (pid_tid && pid_tid->first == pid) {

1505

lldb::tid_t tid = pid_tid->second;

1506

if (tid != LLDB_INVALID_THREAD_ID0 &&

1507

tid != StringExtractorGDBRemote::AllProcesses)

1508

m_thread_ids.push_back(tid);

1509

}

1510

} while (thread_ids.GetChar() == ',');

1511

1512

return m_thread_ids.size();

1513

}

1514

1515

size_t

1516

ProcessGDBRemote::UpdateThreadPCsFromStopReplyThreadsValue(std::string &value) {

1517

m_thread_pcs.clear();

1518

size_t comma_pos;

1519

lldb::addr_t pc;

1520

while ((comma_pos = value.find(',')) != std::string::npos) {

1521

value[comma_pos] = '\0';

1522

pc = StringConvert::ToUInt64(value.c_str(), LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 16);

1523

if (pc != LLDB_INVALID_ADDRESS0xffffffffffffffffULL)

1524

m_thread_pcs.push_back(pc);

1525

value.erase(0, comma_pos + 1);

1526

}

1527

pc = StringConvert::ToUInt64(value.c_str(), LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 16);

1528

if (pc != LLDB_INVALID_ADDRESS0xffffffffffffffffULL)

1529

m_thread_pcs.push_back(pc);

1530

return m_thread_pcs.size();

1531

}

1532

1533

bool ProcessGDBRemote::UpdateThreadIDList() {

1534

std::lock_guard<std::recursive_mutex> guard(m_thread_list_real.GetMutex());

1535

1536

if (m_jthreadsinfo_sp) {

1537

// If we have the JSON threads info, we can get the thread list from that

1538

StructuredData::Array *thread_infos = m_jthreadsinfo_sp->GetAsArray();

1539

if (thread_infos && thread_infos->GetSize() > 0) {

1540

m_thread_ids.clear();

1541

m_thread_pcs.clear();

1542

thread_infos->ForEach([this](StructuredData::Object *object) -> bool {

1543

StructuredData::Dictionary *thread_dict = object->GetAsDictionary();

1544

if (thread_dict) {

1545

// Set the thread stop info from the JSON dictionary

1546

SetThreadStopInfo(thread_dict);

1547

lldb::tid_t tid = LLDB_INVALID_THREAD_ID0;

1548

if (thread_dict->GetValueForKeyAsInteger<lldb::tid_t>("tid", tid))

1549

m_thread_ids.push_back(tid);

1550

}

1551

return true; // Keep iterating through all thread_info objects

1552

});

1553

}

1554

if (!m_thread_ids.empty())

1555

return true;

1556

} else {

1557

// See if we can get the thread IDs from the current stop reply packets

1558

// that might contain a "threads" key/value pair

1559

1560

// Lock the thread stack while we access it

1561

// Mutex::Locker stop_stack_lock(m_last_stop_packet_mutex);

1562

std::unique_lock<std::recursive_mutex> stop_stack_lock(

1563

m_last_stop_packet_mutex, std::defer_lock);

1564

if (stop_stack_lock.try_lock()) {

1565

// Get the number of stop packets on the stack

1566

int nItems = m_stop_packet_stack.size();

1567

// Iterate over them

1568

for (int i = 0; i < nItems; i++) {

1569

// Get the thread stop info

1570

StringExtractorGDBRemote &stop_info = m_stop_packet_stack[i];

1571

const std::string &stop_info_str =

1572

std::string(stop_info.GetStringRef());

1573

1574

m_thread_pcs.clear();

1575

const size_t thread_pcs_pos = stop_info_str.find(";thread-pcs:");

1576

if (thread_pcs_pos != std::string::npos) {

1577

const size_t start = thread_pcs_pos + strlen(";thread-pcs:");

1578

const size_t end = stop_info_str.find(';', start);

1579

if (end != std::string::npos) {

1580

std::string value = stop_info_str.substr(start, end - start);

1581

UpdateThreadPCsFromStopReplyThreadsValue(value);

1582

}

1583

}

1584

1585

const size_t threads_pos = stop_info_str.find(";threads:");

1586

if (threads_pos != std::string::npos) {

1587

const size_t start = threads_pos + strlen(";threads:");

1588

const size_t end = stop_info_str.find(';', start);

1589

if (end != std::string::npos) {

1590

std::string value = stop_info_str.substr(start, end - start);

1591

if (UpdateThreadIDsFromStopReplyThreadsValue(value))

1592

return true;

1593

}

1594

}

1595

}

1596

}

1597

}

1598

1599

bool sequence_mutex_unavailable = false;

1600

m_gdb_comm.GetCurrentThreadIDs(m_thread_ids, sequence_mutex_unavailable);

1601

if (sequence_mutex_unavailable) {

1602

return false; // We just didn't get the list

1603

}

1604

return true;

1605

}

1606

1607

bool ProcessGDBRemote::DoUpdateThreadList(ThreadList &old_thread_list,

1608

ThreadList &new_thread_list) {

1609

// locker will keep a mutex locked until it goes out of scope

1610

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_THREAD(1u << 2)));

1611

LLDB_LOGV(log, "pid = {0}", GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "pid = {0}", GetID()); } while (0);

1612

1613

size_t num_thread_ids = m_thread_ids.size();

1614

// The "m_thread_ids" thread ID list should always be updated after each stop

1615

// reply packet, but in case it isn't, update it here.

1616

if (num_thread_ids == 0) {

1617

if (!UpdateThreadIDList())

1618

return false;

1619

num_thread_ids = m_thread_ids.size();

1620

}

1621

1622

ThreadList old_thread_list_copy(old_thread_list);

1623

if (num_thread_ids > 0) {

1624

for (size_t i = 0; i < num_thread_ids; ++i) {

1625

tid_t tid = m_thread_ids[i];

1626

ThreadSP thread_sp(

1627

old_thread_list_copy.RemoveThreadByProtocolID(tid, false));

1628

if (!thread_sp) {

1629

thread_sp = std::make_shared<ThreadGDBRemote>(*this, tid);

1630

LLDB_LOGV(log, "Making new thread: {0} for thread ID: {1:x}.",do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Making new thread: {0} for thread ID: {1:x}.", thread_sp
.get(), thread_sp->GetID()); } while (0)

1631

thread_sp.get(), thread_sp->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Making new thread: {0} for thread ID: {1:x}.", thread_sp
.get(), thread_sp->GetID()); } while (0);

1632

} else {

1633

LLDB_LOGV(log, "Found old thread: {0} for thread ID: {1:x}.",do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Found old thread: {0} for thread ID: {1:x}.", thread_sp
.get(), thread_sp->GetID()); } while (0)

1634

thread_sp.get(), thread_sp->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
&& log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Found old thread: {0} for thread ID: {1:x}.", thread_sp
.get(), thread_sp->GetID()); } while (0);

1635

}

1636

1637

SetThreadPc(thread_sp, i);

1638

new_thread_list.AddThreadSortedByIndexID(thread_sp);

1639

}

1640

}

1641

1642

// Whatever that is left in old_thread_list_copy are not present in

1643

// new_thread_list. Remove non-existent threads from internal id table.

1644

size_t old_num_thread_ids = old_thread_list_copy.GetSize(false);

1645

for (size_t i = 0; i < old_num_thread_ids; i++) {

1646

ThreadSP old_thread_sp(old_thread_list_copy.GetThreadAtIndex(i, false));

1647

if (old_thread_sp) {

1648

lldb::tid_t old_thread_id = old_thread_sp->GetProtocolID();

1649

m_thread_id_to_index_id_map.erase(old_thread_id);

1650

}

1651

}

1652

1653

return true;

1654

}

1655

1656

void ProcessGDBRemote::SetThreadPc(const ThreadSP &thread_sp, uint64_t index) {

1657

if (m_thread_ids.size() == m_thread_pcs.size() && thread_sp.get() &&

1658

GetByteOrder() != eByteOrderInvalid) {

1659

ThreadGDBRemote *gdb_thread =

1660

static_cast<ThreadGDBRemote *>(thread_sp.get());

1661

RegisterContextSP reg_ctx_sp(thread_sp->GetRegisterContext());

1662

if (reg_ctx_sp) {

1663

uint32_t pc_regnum = reg_ctx_sp->ConvertRegisterKindToRegisterNumber(

1664

eRegisterKindGeneric, LLDB_REGNUM_GENERIC_PC0);

1665

if (pc_regnum != LLDB_INVALID_REGNUM0xffffffffU) {

1666

gdb_thread->PrivateSetRegisterValue(pc_regnum, m_thread_pcs[index]);

1667

}

1668

}

1669

}

1670

}

1671

1672

bool ProcessGDBRemote::GetThreadStopInfoFromJSON(

1673

ThreadGDBRemote *thread, const StructuredData::ObjectSP &thread_infos_sp) {

1674

// See if we got thread stop infos for all threads via the "jThreadsInfo"

1675

// packet

1676

if (thread_infos_sp) {

1677

StructuredData::Array *thread_infos = thread_infos_sp->GetAsArray();

1678

if (thread_infos) {

1679

lldb::tid_t tid;

1680

const size_t n = thread_infos->GetSize();

1681

for (size_t i = 0; i < n; ++i) {

1682

StructuredData::Dictionary *thread_dict =

1683

thread_infos->GetItemAtIndex(i)->GetAsDictionary();

1684

if (thread_dict) {

1685

if (thread_dict->GetValueForKeyAsInteger<lldb::tid_t>(

1686

"tid", tid, LLDB_INVALID_THREAD_ID0)) {

1687

if (tid == thread->GetID())

1688

return (bool)SetThreadStopInfo(thread_dict);

1689

}

1690

}

1691

}

1692

}

1693

}

1694

return false;

1695

}

1696

1697

bool ProcessGDBRemote::CalculateThreadStopInfo(ThreadGDBRemote *thread) {

1698

// See if we got thread stop infos for all threads via the "jThreadsInfo"

1699

// packet

1700

if (GetThreadStopInfoFromJSON(thread, m_jthreadsinfo_sp))

1701

return true;

1702

1703

// See if we got thread stop info for any threads valid stop info reasons

1704

// threads via the "jstopinfo" packet stop reply packet key/value pair?

1705

if (m_jstopinfo_sp) {

1706

// If we have "jstopinfo" then we have stop descriptions for all threads

1707

// that have stop reasons, and if there is no entry for a thread, then it

1708

// has no stop reason.

1709

thread->GetRegisterContext()->InvalidateIfNeeded(true);

1710

if (!GetThreadStopInfoFromJSON(thread, m_jstopinfo_sp)) {

1711

thread->SetStopInfo(StopInfoSP());

1712

}

1713

return true;

1714

}

1715

1716

// Fall back to using the qThreadStopInfo packet

1717

StringExtractorGDBRemote stop_packet;

1718

if (GetGDBRemote().GetThreadStopInfo(thread->GetProtocolID(), stop_packet))

1719

return SetThreadStopInfo(stop_packet) == eStateStopped;

1720

return false;

1721

}

1722

1723

ThreadSP ProcessGDBRemote::SetThreadStopInfo(

1724

lldb::tid_t tid, ExpeditedRegisterMap &expedited_register_map,

1725

uint8_t signo, const std::string &thread_name, const std::string &reason,

1726

const std::string &description, uint32_t exc_type,

1727

const std::vector<addr_t> &exc_data, addr_t thread_dispatch_qaddr,

1728

bool queue_vars_valid, // Set to true if queue_name, queue_kind and

1729

// queue_serial are valid

1730

LazyBool associated_with_dispatch_queue, addr_t dispatch_queue_t,

1731

std::string &queue_name, QueueKind queue_kind, uint64_t queue_serial) {

1732

ThreadSP thread_sp;

1733

if (tid != LLDB_INVALID_THREAD_ID0) {

1734

// Scope for "locker" below

1735

{

1736

// m_thread_list_real does have its own mutex, but we need to hold onto

1737

// the mutex between the call to m_thread_list_real.FindThreadByID(...)

1738

// and the m_thread_list_real.AddThread(...) so it doesn't change on us

1739

std::lock_guard<std::recursive_mutex> guard(

1740

m_thread_list_real.GetMutex());

1741

thread_sp = m_thread_list_real.FindThreadByProtocolID(tid, false);

1742

1743

if (!thread_sp) {

1744

// Create the thread if we need to

1745

thread_sp = std::make_shared<ThreadGDBRemote>(*this, tid);

1746

m_thread_list_real.AddThread(thread_sp);

1747

}

1748

}

1749

1750

if (thread_sp) {

1751

ThreadGDBRemote *gdb_thread =

1752

static_cast<ThreadGDBRemote *>(thread_sp.get());

1753

RegisterContextSP gdb_reg_ctx_sp(gdb_thread->GetRegisterContext());

1754

1755

gdb_reg_ctx_sp->InvalidateIfNeeded(true);

1756

1757

auto iter = std::find(m_thread_ids.begin(), m_thread_ids.end(), tid);

1758

if (iter != m_thread_ids.end()) {

1759

SetThreadPc(thread_sp, iter - m_thread_ids.begin());

1760

}

1761

1762

for (const auto &pair : expedited_register_map) {

1763

StringExtractor reg_value_extractor(pair.second);

1764

DataBufferSP buffer_sp(new DataBufferHeap(

1765

reg_value_extractor.GetStringRef().size() / 2, 0));

1766

reg_value_extractor.GetHexBytes(buffer_sp->GetData(), '\xcc');

1767

uint32_t lldb_regnum =

1768

gdb_reg_ctx_sp->ConvertRegisterKindToRegisterNumber(

1769

eRegisterKindProcessPlugin, pair.first);

1770

gdb_thread->PrivateSetRegisterValue(lldb_regnum, buffer_sp->GetData());

1771

}

1772

1773

// AArch64 SVE specific code below calls AArch64SVEReconfigure to update

1774

// SVE register sizes and offsets if value of VG register has changed

1775

// since last stop.

1776

const ArchSpec &arch = GetTarget().GetArchitecture();

1777

if (arch.IsValid() && arch.GetTriple().isAArch64()) {

1778

GDBRemoteRegisterContext *reg_ctx_sp =

1779

static_cast<GDBRemoteRegisterContext *>(

1780

gdb_thread->GetRegisterContext().get());

1781

1782

if (reg_ctx_sp)

1783

reg_ctx_sp->AArch64SVEReconfigure();

1784

}

1785

1786

thread_sp->SetName(thread_name.empty() ? nullptr : thread_name.c_str());

1787

1788

gdb_thread->SetThreadDispatchQAddr(thread_dispatch_qaddr);

1789

// Check if the GDB server was able to provide the queue name, kind and

1790

// serial number

1791

if (queue_vars_valid)

1792

gdb_thread->SetQueueInfo(std::move(queue_name), queue_kind,

1793

queue_serial, dispatch_queue_t,

1794

associated_with_dispatch_queue);

1795

else

1796

gdb_thread->ClearQueueInfo();

1797

1798

gdb_thread->SetAssociatedWithLibdispatchQueue(

1799

associated_with_dispatch_queue);

1800

1801

if (dispatch_queue_t != LLDB_INVALID_ADDRESS0xffffffffffffffffULL)

1802

gdb_thread->SetQueueLibdispatchQueueAddress(dispatch_queue_t);

1803

1804

// Make sure we update our thread stop reason just once

1805

if (!thread_sp->StopInfoIsUpToDate()) {

1806

thread_sp->SetStopInfo(StopInfoSP());

1807

// If there's a memory thread backed by this thread, we need to use it

1808

// to calculate StopInfo.

1809

if (ThreadSP memory_thread_sp =

1810

m_thread_list.GetBackingThread(thread_sp))

1811

thread_sp = memory_thread_sp;

1812

1813

if (exc_type != 0) {

1814

const size_t exc_data_size = exc_data.size();

1815

1816

thread_sp->SetStopInfo(

1817

StopInfoMachException::CreateStopReasonWithMachException(

1818

*thread_sp, exc_type, exc_data_size,

1819

exc_data_size >= 1 ? exc_data[0] : 0,

1820

exc_data_size >= 2 ? exc_data[1] : 0,

1821

exc_data_size >= 3 ? exc_data[2] : 0));

1822

} else {

1823

bool handled = false;

1824

bool did_exec = false;

1825

if (!reason.empty()) {

1826

if (reason == "trace") {

1827

addr_t pc = thread_sp->GetRegisterContext()->GetPC();

1828

lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()

1829

->GetBreakpointSiteList()

1830

.FindByAddress(pc);

1831

1832

// If the current pc is a breakpoint site then the StopInfo

1833

// should be set to Breakpoint Otherwise, it will be set to

1834

// Trace.

1835

if (bp_site_sp && bp_site_sp->ValidForThisThread(*thread_sp)) {

1836

thread_sp->SetStopInfo(

1837

StopInfo::CreateStopReasonWithBreakpointSiteID(

1838

*thread_sp, bp_site_sp->GetID()));

1839

} else

1840

thread_sp->SetStopInfo(

1841

StopInfo::CreateStopReasonToTrace(*thread_sp));

1842

handled = true;

1843

} else if (reason == "breakpoint") {

1844

addr_t pc = thread_sp->GetRegisterContext()->GetPC();

1845

lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()

1846

->GetBreakpointSiteList()

1847

.FindByAddress(pc);

1848

if (bp_site_sp) {

1849

// If the breakpoint is for this thread, then we'll report the

1850

// hit, but if it is for another thread, we can just report no

1851

// reason. We don't need to worry about stepping over the

1852

// breakpoint here, that will be taken care of when the thread

1853

// resumes and notices that there's a breakpoint under the pc.

1854

handled = true;

1855

if (bp_site_sp->ValidForThisThread(*thread_sp)) {

1856

thread_sp->SetStopInfo(

1857

StopInfo::CreateStopReasonWithBreakpointSiteID(

1858

*thread_sp, bp_site_sp->GetID()));

1859

} else {

1860

StopInfoSP invalid_stop_info_sp;

1861

thread_sp->SetStopInfo(invalid_stop_info_sp);

1862

}

1863

}

1864

} else if (reason == "trap") {

1865

// Let the trap just use the standard signal stop reason below...

1866

} else if (reason == "watchpoint") {

1867

StringExtractor desc_extractor(description.c_str());

1868

addr_t wp_addr = desc_extractor.GetU64(LLDB_INVALID_ADDRESS0xffffffffffffffffULL);

1869

uint32_t wp_index = desc_extractor.GetU32(LLDB_INVALID_INDEX320xffffffffU);

1870

addr_t wp_hit_addr = desc_extractor.GetU64(LLDB_INVALID_ADDRESS0xffffffffffffffffULL);

1871

watch_id_t watch_id = LLDB_INVALID_WATCH_ID0;

1872

if (wp_addr != LLDB_INVALID_ADDRESS0xffffffffffffffffULL) {

1873

WatchpointSP wp_sp;

1874

ArchSpec::Core core = GetTarget().GetArchitecture().GetCore();

1875

if ((core >= ArchSpec::kCore_mips_first &&

1876

core <= ArchSpec::kCore_mips_last) ||

1877

(core >= ArchSpec::eCore_arm_generic &&

1878

core <= ArchSpec::eCore_arm_aarch64))

1879

wp_sp = GetTarget().GetWatchpointList().FindByAddress(

1880

wp_hit_addr);

1881

if (!wp_sp)

1882

wp_sp =

1883

GetTarget().GetWatchpointList().FindByAddress(wp_addr);

1884

if (wp_sp) {

1885

wp_sp->SetHardwareIndex(wp_index);

1886

watch_id = wp_sp->GetID();

1887

}

1888

}

1889

if (watch_id == LLDB_INVALID_WATCH_ID0) {

1890

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(

1891

GDBR_LOG_WATCHPOINTS(1u << 8)));

1892

LLDB_LOGF(log, "failed to find watchpoint")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("failed to find watchpoint"); } while
(0);

1893

}

1894

thread_sp->SetStopInfo(StopInfo::CreateStopReasonWithWatchpointID(

1895

*thread_sp, watch_id, wp_hit_addr));

1896

handled = true;

1897

} else if (reason == "exception") {

1898

thread_sp->SetStopInfo(StopInfo::CreateStopReasonWithException(

1899

*thread_sp, description.c_str()));

1900

handled = true;

1901

} else if (reason == "exec") {

1902

did_exec = true;

1903

thread_sp->SetStopInfo(

1904

StopInfo::CreateStopReasonWithExec(*thread_sp));

1905

handled = true;

1906

} else if (reason == "processor trace") {

1907

thread_sp->SetStopInfo(StopInfo::CreateStopReasonProcessorTrace(

1908

*thread_sp, description.c_str()));

1909

}

1910

} else if (!signo) {

1911

addr_t pc = thread_sp->GetRegisterContext()->GetPC();

1912

lldb::BreakpointSiteSP bp_site_sp =

1913

thread_sp->GetProcess()->GetBreakpointSiteList().FindByAddress(

1914

pc);

1915

1916

// If the current pc is a breakpoint site then the StopInfo should

1917

// be set to Breakpoint even though the remote stub did not set it

1918

// as such. This can happen when the thread is involuntarily

1919

// interrupted (e.g. due to stops on other threads) just as it is

1920

// about to execute the breakpoint instruction.

1921

if (bp_site_sp && bp_site_sp->ValidForThisThread(*thread_sp)) {

1922

thread_sp->SetStopInfo(

1923

StopInfo::CreateStopReasonWithBreakpointSiteID(

1924

*thread_sp, bp_site_sp->GetID()));

1925

handled = true;

1926

}

1927

}

1928

1929

if (!handled && signo && !did_exec) {

1930

if (signo == SIGTRAP5) {

1931

// Currently we are going to assume SIGTRAP means we are either

1932

// hitting a breakpoint or hardware single stepping.

1933

handled = true;

1934

addr_t pc = thread_sp->GetRegisterContext()->GetPC() +

1935

m_breakpoint_pc_offset;

1936

lldb::BreakpointSiteSP bp_site_sp = thread_sp->GetProcess()

1937

->GetBreakpointSiteList()

1938

.FindByAddress(pc);

1939

1940

if (bp_site_sp) {

1941

// If the breakpoint is for this thread, then we'll report the

1942

// hit, but if it is for another thread, we can just report no

1943

// reason. We don't need to worry about stepping over the

1944

// breakpoint here, that will be taken care of when the thread

1945

// resumes and notices that there's a breakpoint under the pc.

1946

if (bp_site_sp->ValidForThisThread(*thread_sp)) {

1947

if (m_breakpoint_pc_offset != 0)

1948

thread_sp->GetRegisterContext()->SetPC(pc);

1949

thread_sp->SetStopInfo(

1950

StopInfo::CreateStopReasonWithBreakpointSiteID(

1951

*thread_sp, bp_site_sp->GetID()));

1952

} else {

1953

StopInfoSP invalid_stop_info_sp;

1954

thread_sp->SetStopInfo(invalid_stop_info_sp);

1955

}

1956

} else {

1957

// If we were stepping then assume the stop was the result of

1958

// the trace. If we were not stepping then report the SIGTRAP.

1959

// FIXME: We are still missing the case where we single step

1960

// over a trap instruction.

1961

if (thread_sp->GetTemporaryResumeState() == eStateStepping)

1962

thread_sp->SetStopInfo(

1963

StopInfo::CreateStopReasonToTrace(*thread_sp));

1964

else

1965

thread_sp->SetStopInfo(StopInfo::CreateStopReasonWithSignal(

1966

*thread_sp, signo, description.c_str()));

1967

}

1968

}

1969

if (!handled)

1970

thread_sp->SetStopInfo(StopInfo::CreateStopReasonWithSignal(

1971

*thread_sp, signo, description.c_str()));

1972

}

1973

1974

if (!description.empty()) {

1975

lldb::StopInfoSP stop_info_sp(thread_sp->GetStopInfo());

1976

if (stop_info_sp) {

1977

const char *stop_info_desc = stop_info_sp->GetDescription();

1978

if (!stop_info_desc || !stop_info_desc[0])

1979

stop_info_sp->SetDescription(description.c_str());

1980

} else {

1981

thread_sp->SetStopInfo(StopInfo::CreateStopReasonWithException(

1982

*thread_sp, description.c_str()));

1983

}

1984

}

1985

}

1986

}

1987

}

1988

}

1989

return thread_sp;

1990

}

1991

1992

lldb::ThreadSP

1993

ProcessGDBRemote::SetThreadStopInfo(StructuredData::Dictionary *thread_dict) {

1994

static ConstString g_key_tid("tid");

1995

static ConstString g_key_name("name");

1996

static ConstString g_key_reason("reason");

1997

static ConstString g_key_metype("metype");

1998

static ConstString g_key_medata("medata");

1999

static ConstString g_key_qaddr("qaddr");

2000

static ConstString g_key_dispatch_queue_t("dispatch_queue_t");

2001

static ConstString g_key_associated_with_dispatch_queue(

2002

"associated_with_dispatch_queue");

2003

static ConstString g_key_queue_name("qname");

2004

static ConstString g_key_queue_kind("qkind");

2005

static ConstString g_key_queue_serial_number("qserialnum");

2006

static ConstString g_key_registers("registers");

2007

static ConstString g_key_memory("memory");

2008

static ConstString g_key_address("address");

2009

static ConstString g_key_bytes("bytes");

2010

static ConstString g_key_description("description");

2011

static ConstString g_key_signal("signal");

2012

2013

// Stop with signal and thread info

2014

lldb::tid_t tid = LLDB_INVALID_THREAD_ID0;

2015

uint8_t signo = 0;

2016

std::string value;

2017

std::string thread_name;

2018

std::string reason;

2019

std::string description;

2020

uint32_t exc_type = 0;

2021

std::vector<addr_t> exc_data;

2022

addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2023

ExpeditedRegisterMap expedited_register_map;

2024

bool queue_vars_valid = false;

2025

addr_t dispatch_queue_t = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2026

LazyBool associated_with_dispatch_queue = eLazyBoolCalculate;

2027

std::string queue_name;

2028

QueueKind queue_kind = eQueueKindUnknown;

2029

uint64_t queue_serial_number = 0;

2030

// Iterate through all of the thread dictionary key/value pairs from the

2031

// structured data dictionary

2032

2033

thread_dict->ForEach([this, &tid, &expedited_register_map, &thread_name,

2034

&signo, &reason, &description, &exc_type, &exc_data,

2035

&thread_dispatch_qaddr, &queue_vars_valid,

2036

&associated_with_dispatch_queue, &dispatch_queue_t,

2037

&queue_name, &queue_kind, &queue_serial_number](

2038

ConstString key,

2039

StructuredData::Object *object) -> bool {

2040

if (key == g_key_tid) {

2041

// thread in big endian hex

2042

tid = object->GetIntegerValue(LLDB_INVALID_THREAD_ID0);

2043

} else if (key == g_key_metype) {

2044

// exception type in big endian hex

2045

exc_type = object->GetIntegerValue(0);

2046

} else if (key == g_key_medata) {

2047

// exception data in big endian hex

2048

StructuredData::Array *array = object->GetAsArray();

2049

if (array) {

2050

array->ForEach([&exc_data](StructuredData::Object *object) -> bool {

2051

exc_data.push_back(object->GetIntegerValue());

2052

return true; // Keep iterating through all array items

2053

});

2054

}

2055

} else if (key == g_key_name) {

2056

thread_name = std::string(object->GetStringValue());

2057

} else if (key == g_key_qaddr) {

2058

thread_dispatch_qaddr = object->GetIntegerValue(LLDB_INVALID_ADDRESS0xffffffffffffffffULL);

2059

} else if (key == g_key_queue_name) {

2060

queue_vars_valid = true;

2061

queue_name = std::string(object->GetStringValue());

2062

} else if (key == g_key_queue_kind) {

2063

std::string queue_kind_str = std::string(object->GetStringValue());

2064

if (queue_kind_str == "serial") {

2065

queue_vars_valid = true;

2066

queue_kind = eQueueKindSerial;

2067

} else if (queue_kind_str == "concurrent") {

2068

queue_vars_valid = true;

2069

queue_kind = eQueueKindConcurrent;

2070

}

2071

} else if (key == g_key_queue_serial_number) {

2072

queue_serial_number = object->GetIntegerValue(0);

2073

if (queue_serial_number != 0)

2074

queue_vars_valid = true;

2075

} else if (key == g_key_dispatch_queue_t) {

2076

dispatch_queue_t = object->GetIntegerValue(0);

2077

if (dispatch_queue_t != 0 && dispatch_queue_t != LLDB_INVALID_ADDRESS0xffffffffffffffffULL)

2078

queue_vars_valid = true;

2079

} else if (key == g_key_associated_with_dispatch_queue) {

2080

queue_vars_valid = true;

2081

bool associated = object->GetBooleanValue();

2082

if (associated)

2083

associated_with_dispatch_queue = eLazyBoolYes;

2084

else

2085

associated_with_dispatch_queue = eLazyBoolNo;

2086

} else if (key == g_key_reason) {

2087

reason = std::string(object->GetStringValue());

2088

} else if (key == g_key_description) {

2089

description = std::string(object->GetStringValue());

2090

} else if (key == g_key_registers) {

2091

StructuredData::Dictionary *registers_dict = object->GetAsDictionary();

2092

2093

if (registers_dict) {

2094

registers_dict->ForEach(

2095

[&expedited_register_map](ConstString key,

2096

StructuredData::Object *object) -> bool {

2097

const uint32_t reg =

2098

StringConvert::ToUInt32(key.GetCString(), UINT32_MAX0xffffffffU, 10);

2099

if (reg != UINT32_MAX0xffffffffU)

2100

expedited_register_map[reg] =

2101

std::string(object->GetStringValue());

2102

return true; // Keep iterating through all array items

2103

});

2104

}

2105

} else if (key == g_key_memory) {

2106

StructuredData::Array *array = object->GetAsArray();

2107

if (array) {

2108

array->ForEach([this](StructuredData::Object *object) -> bool {

2109

StructuredData::Dictionary *mem_cache_dict =

2110

object->GetAsDictionary();

2111

if (mem_cache_dict) {

2112

lldb::addr_t mem_cache_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2113

if (mem_cache_dict->GetValueForKeyAsInteger<lldb::addr_t>(

2114

"address", mem_cache_addr)) {

2115

if (mem_cache_addr != LLDB_INVALID_ADDRESS0xffffffffffffffffULL) {

2116

llvm::StringRef str;

2117

if (mem_cache_dict->GetValueForKeyAsString("bytes", str)) {

2118

StringExtractor bytes(str);

2119

bytes.SetFilePos(0);

2120

2121

const size_t byte_size = bytes.GetStringRef().size() / 2;

2122

DataBufferSP data_buffer_sp(new DataBufferHeap(byte_size, 0));

2123

const size_t bytes_copied =

2124

bytes.GetHexBytes(data_buffer_sp->GetData(), 0);

2125

if (bytes_copied == byte_size)

2126

m_memory_cache.AddL1CacheData(mem_cache_addr,

2127

data_buffer_sp);

2128

}

2129

}

2130

}

2131

}

2132

return true; // Keep iterating through all array items

2133

});

2134

}

2135

2136

} else if (key == g_key_signal)

2137

signo = object->GetIntegerValue(LLDB_INVALID_SIGNAL_NUMBER0x7fffffff);

2138

return true; // Keep iterating through all dictionary key/value pairs

2139

});

2140

2141

return SetThreadStopInfo(tid, expedited_register_map, signo, thread_name,

2142

reason, description, exc_type, exc_data,

2143

thread_dispatch_qaddr, queue_vars_valid,

2144

associated_with_dispatch_queue, dispatch_queue_t,

2145

queue_name, queue_kind, queue_serial_number);

2146

}

2147

2148

StateType ProcessGDBRemote::SetThreadStopInfo(StringExtractor &stop_packet) {

2149

lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID();

2150

stop_packet.SetFilePos(0);

2151

const char stop_type = stop_packet.GetChar();

2152

switch (stop_type) {

2153

case 'T':

2154

case 'S': {

2155

// This is a bit of a hack, but is is required. If we did exec, we need to

2156

// clear our thread lists and also know to rebuild our dynamic register

2157

// info before we lookup and threads and populate the expedited register

2158

// values so we need to know this right away so we can cleanup and update

2159

// our registers.

2160

const uint32_t stop_id = GetStopID();

2161

if (stop_id == 0) {

2162

// Our first stop, make sure we have a process ID, and also make sure we

2163

// know about our registers

2164

if (GetID() == LLDB_INVALID_PROCESS_ID0 && pid != LLDB_INVALID_PROCESS_ID0)

2165

SetID(pid);

2166

BuildDynamicRegisterInfo(true);

2167

}

2168

// Stop with signal and thread info

2169

lldb::pid_t stop_pid = LLDB_INVALID_PROCESS_ID0;

2170

lldb::tid_t tid = LLDB_INVALID_THREAD_ID0;

2171

const uint8_t signo = stop_packet.GetHexU8();

2172

llvm::StringRef key;

2173

llvm::StringRef value;

2174

std::string thread_name;

2175

std::string reason;

2176

std::string description;

2177

uint32_t exc_type = 0;

2178

std::vector<addr_t> exc_data;

2179

addr_t thread_dispatch_qaddr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2180

bool queue_vars_valid =

2181

false; // says if locals below that start with "queue_" are valid

2182

addr_t dispatch_queue_t = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2183

LazyBool associated_with_dispatch_queue = eLazyBoolCalculate;

2184

std::string queue_name;

2185

QueueKind queue_kind = eQueueKindUnknown;

2186

uint64_t queue_serial_number = 0;

2187

ExpeditedRegisterMap expedited_register_map;

2188

while (stop_packet.GetNameColonValue(key, value)) {

2189

if (key.compare("metype") == 0) {

2190

// exception type in big endian hex

2191

value.getAsInteger(16, exc_type);

2192

} else if (key.compare("medata") == 0) {

2193

// exception data in big endian hex

2194

uint64_t x;

2195

value.getAsInteger(16, x);

2196

exc_data.push_back(x);

2197

} else if (key.compare("thread") == 0) {

2198

// thread-id

2199

StringExtractorGDBRemote thread_id{value};

2200

auto pid_tid = thread_id.GetPidTid(pid);

2201

if (pid_tid) {

2202

stop_pid = pid_tid->first;

2203

tid = pid_tid->second;

2204

} else

2205

tid = LLDB_INVALID_THREAD_ID0;

2206

} else if (key.compare("threads") == 0) {

2207

std::lock_guard<std::recursive_mutex> guard(

2208

m_thread_list_real.GetMutex());

2209

UpdateThreadIDsFromStopReplyThreadsValue(value);

2210

} else if (key.compare("thread-pcs") == 0) {

2211

m_thread_pcs.clear();

2212

// A comma separated list of all threads in the current

2213

// process that includes the thread for this stop reply packet

2214

lldb::addr_t pc;

2215

while (!value.empty()) {

2216

llvm::StringRef pc_str;

2217

std::tie(pc_str, value) = value.split(',');

2218

if (pc_str.getAsInteger(16, pc))

2219

pc = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2220

m_thread_pcs.push_back(pc);

2221

}

2222

} else if (key.compare("jstopinfo") == 0) {

2223

StringExtractor json_extractor(value);

2224

std::string json;

2225

// Now convert the HEX bytes into a string value

2226

json_extractor.GetHexByteString(json);

2227

2228

// This JSON contains thread IDs and thread stop info for all threads.

2229

// It doesn't contain expedited registers, memory or queue info.

2230

m_jstopinfo_sp = StructuredData::ParseJSON(json);

2231

} else if (key.compare("hexname") == 0) {

2232

StringExtractor name_extractor(value);

2233

std::string name;

2234

// Now convert the HEX bytes into a string value

2235

name_extractor.GetHexByteString(thread_name);

2236

} else if (key.compare("name") == 0) {

2237

thread_name = std::string(value);

2238

} else if (key.compare("qaddr") == 0) {

2239

value.getAsInteger(16, thread_dispatch_qaddr);

2240

} else if (key.compare("dispatch_queue_t") == 0) {

2241

queue_vars_valid = true;

2242

value.getAsInteger(16, dispatch_queue_t);

2243

} else if (key.compare("qname") == 0) {

2244

queue_vars_valid = true;

2245

StringExtractor name_extractor(value);

2246

// Now convert the HEX bytes into a string value

2247

name_extractor.GetHexByteString(queue_name);

2248

} else if (key.compare("qkind") == 0) {

2249

queue_kind = llvm::StringSwitch<QueueKind>(value)

2250

.Case("serial", eQueueKindSerial)

2251

.Case("concurrent", eQueueKindConcurrent)

2252

.Default(eQueueKindUnknown);

2253

queue_vars_valid = queue_kind != eQueueKindUnknown;

2254

} else if (key.compare("qserialnum") == 0) {

2255

if (!value.getAsInteger(0, queue_serial_number))

2256

queue_vars_valid = true;

2257

} else if (key.compare("reason") == 0) {

2258

reason = std::string(value);

2259

} else if (key.compare("description") == 0) {

2260

StringExtractor desc_extractor(value);

2261

// Now convert the HEX bytes into a string value

2262

desc_extractor.GetHexByteString(description);

2263

} else if (key.compare("memory") == 0) {

2264

// Expedited memory. GDB servers can choose to send back expedited

2265

// memory that can populate the L1 memory cache in the process so that

2266

// things like the frame pointer backchain can be expedited. This will

2267

// help stack backtracing be more efficient by not having to send as

2268

// many memory read requests down the remote GDB server.

2269

2270

// Key/value pair format: memory:<addr>=<bytes>;

2271

// <addr> is a number whose base will be interpreted by the prefix:

2272

// "0x[0-9a-fA-F]+" for hex

2273

// "0[0-7]+" for octal

2274

// "[1-9]+" for decimal

2275

// <bytes> is native endian ASCII hex bytes just like the register

2276

// values

2277

llvm::StringRef addr_str, bytes_str;

2278

std::tie(addr_str, bytes_str) = value.split('=');

2279

if (!addr_str.empty() && !bytes_str.empty()) {

2280

lldb::addr_t mem_cache_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2281

if (!addr_str.getAsInteger(0, mem_cache_addr)) {

2282

StringExtractor bytes(bytes_str);

2283

const size_t byte_size = bytes.GetBytesLeft() / 2;

2284

DataBufferSP data_buffer_sp(new DataBufferHeap(byte_size, 0));

2285

const size_t bytes_copied =

2286

bytes.GetHexBytes(data_buffer_sp->GetData(), 0);

2287

if (bytes_copied == byte_size)

2288

m_memory_cache.AddL1CacheData(mem_cache_addr, data_buffer_sp);

2289

}

2290

}

2291

} else if (key.compare("watch") == 0 || key.compare("rwatch") == 0 ||

2292

key.compare("awatch") == 0) {

2293

// Support standard GDB remote stop reply packet 'TAAwatch:addr'

2294

lldb::addr_t wp_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

2295

value.getAsInteger(16, wp_addr);

2296

2297

WatchpointSP wp_sp =

2298

GetTarget().GetWatchpointList().FindByAddress(wp_addr);

2299

uint32_t wp_index = LLDB_INVALID_INDEX320xffffffffU;

2300

2301

if (wp_sp)

2302

wp_index = wp_sp->GetHardwareIndex();

2303

2304

reason = "watchpoint";

2305

StreamString ostr;

2306

ostr.Printf("%" PRIu64"llu" " %" PRIu32"u", wp_addr, wp_index);

2307

description = std::string(ostr.GetString());

2308

} else if (key.compare("library") == 0) {

2309

auto error = LoadModules();

2310

if (error) {

2311

Log *log(

2312

ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

2313

LLDB_LOG_ERROR(log, std::move(error), "Failed to load modules: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (std::move(error)); if (log_private && error_private
) { log_private->FormatError(::std::move(error_private), "/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Failed to load modules: {0}"); } else ::llvm::consumeError
(::std::move(error_private)); } while (0);

2314

}

2315

} else if (key.size() == 2 && ::isxdigit(key[0]) && ::isxdigit(key[1])) {

2316

uint32_t reg = UINT32_MAX0xffffffffU;

2317

if (!key.getAsInteger(16, reg))

2318

expedited_register_map[reg] = std::string(std::move(value));

2319

}

2320

}

2321

2322

if (stop_pid != LLDB_INVALID_PROCESS_ID0 && stop_pid != pid) {

2323

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

2324

LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Received stop for incorrect PID = {0} (inferior PID = {1})"
, stop_pid, pid); } while (0)

2325

"Received stop for incorrect PID = {0} (inferior PID = {1})",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Received stop for incorrect PID = {0} (inferior PID = {1})"
, stop_pid, pid); } while (0)

2326

stop_pid, pid)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Received stop for incorrect PID = {0} (inferior PID = {1})"
, stop_pid, pid); } while (0);

2327

return eStateInvalid;

2328

}

2329

2330

if (tid == LLDB_INVALID_THREAD_ID0) {

2331

// A thread id may be invalid if the response is old style 'S' packet

2332

// which does not provide the

2333

// thread information. So update the thread list and choose the first

2334

// one.

2335

UpdateThreadIDList();

2336

2337

if (!m_thread_ids.empty()) {

2338

tid = m_thread_ids.front();

2339

}

2340

}

2341

2342

ThreadSP thread_sp = SetThreadStopInfo(

2343

tid, expedited_register_map, signo, thread_name, reason, description,

2344

exc_type, exc_data, thread_dispatch_qaddr, queue_vars_valid,

2345

associated_with_dispatch_queue, dispatch_queue_t, queue_name,

2346

queue_kind, queue_serial_number);

2347

2348

return eStateStopped;

2349

} break;

2350

2351

case 'W':

2352

case 'X':

2353

// process exited

2354

return eStateExited;

2355

2356

default:

2357

break;

2358

}

2359

return eStateInvalid;

2360

}

2361

2362

void ProcessGDBRemote::RefreshStateAfterStop() {

2363

std::lock_guard<std::recursive_mutex> guard(m_thread_list_real.GetMutex());

2364

2365

m_thread_ids.clear();

2366

m_thread_pcs.clear();

2367

2368

// Set the thread stop info. It might have a "threads" key whose value is a

2369

// list of all thread IDs in the current process, so m_thread_ids might get

2370

// set.

2371

// Check to see if SetThreadStopInfo() filled in m_thread_ids?

2372

if (m_thread_ids.empty()) {

2373

// No, we need to fetch the thread list manually

2374

UpdateThreadIDList();

2375

}

2376

2377

// We might set some stop info's so make sure the thread list is up to

2378

// date before we do that or we might overwrite what was computed here.

2379

UpdateThreadListIfNeeded();

2380

2381

// Scope for the lock

2382

{

2383

// Lock the thread stack while we access it

2384

std::lock_guard<std::recursive_mutex> guard(m_last_stop_packet_mutex);

2385

// Get the number of stop packets on the stack

2386

int nItems = m_stop_packet_stack.size();

2387

// Iterate over them

2388

for (int i = 0; i < nItems; i++) {

2389

// Get the thread stop info

2390

StringExtractorGDBRemote stop_info = m_stop_packet_stack[i];

2391

// Process thread stop info

2392

SetThreadStopInfo(stop_info);

2393

}

2394

// Clear the thread stop stack

2395

m_stop_packet_stack.clear();

2396

}

2397

2398

// If we have queried for a default thread id

2399

if (m_initial_tid != LLDB_INVALID_THREAD_ID0) {

2400

m_thread_list.SetSelectedThreadByID(m_initial_tid);

2401

m_initial_tid = LLDB_INVALID_THREAD_ID0;

2402

}

2403

2404

// Let all threads recover from stopping and do any clean up based on the

2405

// previous thread state (if any).

2406

m_thread_list_real.RefreshStateAfterStop();

2407

}

2408

2409

Status ProcessGDBRemote::DoHalt(bool &caused_stop) {

2410

Status error;

2411

2412

if (m_public_state.GetValue() == eStateAttaching) {

2413

// We are being asked to halt during an attach. We need to just close our

2414

// file handle and debugserver will go away, and we can be done...

2415

m_gdb_comm.Disconnect();

2416

} else

2417

caused_stop = m_gdb_comm.Interrupt(GetInterruptTimeout());

2418

return error;

2419

}

2420

2421

Status ProcessGDBRemote::DoDetach(bool keep_stopped) {

2422

Status error;

2423

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

2424

LLDB_LOGF(log, "ProcessGDBRemote::DoDetach(keep_stopped: %i)", keep_stopped)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDetach(keep_stopped: %i)"
, keep_stopped); } while (0);

2425

2426

error = m_gdb_comm.Detach(keep_stopped);

2427

if (log) {

2428

if (error.Success())

2429

log->PutCString(

2430

"ProcessGDBRemote::DoDetach() detach packet sent successfully");

2431

else

2432

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDetach() detach packet send failed: %s"
, error.AsCString() ? error.AsCString() : "<unknown error>"
); } while (0)

2433

"ProcessGDBRemote::DoDetach() detach packet send failed: %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDetach() detach packet send failed: %s"
, error.AsCString() ? error.AsCString() : "<unknown error>"
); } while (0)

2434

error.AsCString() ? error.AsCString() : "<unknown error>")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDetach() detach packet send failed: %s"
, error.AsCString() ? error.AsCString() : "<unknown error>"
); } while (0);

2435

}

2436

2437

if (!error.Success())

2438

return error;

2439

2440

// Sleep for one second to let the process get all detached...

2441

StopAsyncThread();

2442

2443

SetPrivateState(eStateDetached);

2444

ResumePrivateStateThread();

2445

2446

// KillDebugserverProcess ();

2447

return error;

2448

}

2449

2450

Status ProcessGDBRemote::DoDestroy() {

2451

Status error;

2452

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

2453

LLDB_LOGF(log, "ProcessGDBRemote::DoDestroy()")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy()"); } while
(0);

2454

2455

// There is a bug in older iOS debugservers where they don't shut down the

2456

// process they are debugging properly. If the process is sitting at a

2457

// breakpoint or an exception, this can cause problems with restarting. So

2458

// we check to see if any of our threads are stopped at a breakpoint, and if

2459

// so we remove all the breakpoints, resume the process, and THEN destroy it

2460

// again.

2461

//

2462

// Note, we don't have a good way to test the version of debugserver, but I

2463

// happen to know that the set of all the iOS debugservers which don't

2464

// support GetThreadSuffixSupported() and that of the debugservers with this

2465

// bug are equal. There really should be a better way to test this!

2466

//

2467

// We also use m_destroy_tried_resuming to make sure we only do this once, if

2468

// we resume and then halt and get called here to destroy again and we're

2469

// still at a breakpoint or exception, then we should just do the straight-

2470

// forward kill.

2471

//

2472

// And of course, if we weren't able to stop the process by the time we get

2473

// here, it isn't necessary (or helpful) to do any of this.

2474

2475

if (!m_gdb_comm.GetThreadSuffixSupported() &&

2476

m_public_state.GetValue() != eStateRunning) {

2477

PlatformSP platform_sp = GetTarget().GetPlatform();

2478

2479

// FIXME: These should be ConstStrings so we aren't doing strcmp'ing.

2480

if (platform_sp && platform_sp->GetName() &&

2481

platform_sp->GetName() == PlatformRemoteiOS::GetPluginNameStatic()) {

2482

if (m_destroy_tried_resuming) {

2483

if (log)

2484

log->PutCString("ProcessGDBRemote::DoDestroy() - Tried resuming to "

2485

"destroy once already, not doing it again.");

2486

} else {

2487

// At present, the plans are discarded and the breakpoints disabled

2488

// Process::Destroy, but we really need it to happen here and it

2489

// doesn't matter if we do it twice.

2490

m_thread_list.DiscardThreadPlans();

2491

DisableAllBreakpointSites();

2492

2493

bool stop_looks_like_crash = false;

2494

ThreadList &threads = GetThreadList();

2495

2496

{

2497

std::lock_guard<std::recursive_mutex> guard(threads.GetMutex());

2498

2499

size_t num_threads = threads.GetSize();

2500

for (size_t i = 0; i < num_threads; i++) {

2501

ThreadSP thread_sp = threads.GetThreadAtIndex(i);

2502

StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo();

2503

StopReason reason = eStopReasonInvalid;

2504

if (stop_info_sp)

2505

reason = stop_info_sp->GetStopReason();

2506

if (reason == eStopReasonBreakpoint ||

2507

reason == eStopReasonException) {

2508

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4"
"llx" " stopped with reason: %s.", thread_sp->GetProtocolID
(), stop_info_sp->GetDescription()); } while (0)

2509

"ProcessGDBRemote::DoDestroy() - thread: 0x%4.4" PRIx64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4"
"llx" " stopped with reason: %s.", thread_sp->GetProtocolID
(), stop_info_sp->GetDescription()); } while (0)

2510

" stopped with reason: %s.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4"
"llx" " stopped with reason: %s.", thread_sp->GetProtocolID
(), stop_info_sp->GetDescription()); } while (0)

2511

thread_sp->GetProtocolID(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4"
"llx" " stopped with reason: %s.", thread_sp->GetProtocolID
(), stop_info_sp->GetDescription()); } while (0)

2512

stop_info_sp->GetDescription())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - thread: 0x%4.4"
"llx" " stopped with reason: %s.", thread_sp->GetProtocolID
(), stop_info_sp->GetDescription()); } while (0);

2513

stop_looks_like_crash = true;

2514

break;

2515

}

2516

}

2517

}

2518

2519

if (stop_looks_like_crash) {

2520

if (log)

2521

log->PutCString("ProcessGDBRemote::DoDestroy() - Stopped at a "

2522

"breakpoint, continue and then kill.");

2523

m_destroy_tried_resuming = true;

2524

2525

// If we are going to run again before killing, it would be good to

2526

// suspend all the threads before resuming so they won't get into

2527

// more trouble. Sadly, for the threads stopped with the breakpoint

2528

// or exception, the exception doesn't get cleared if it is

2529

// suspended, so we do have to run the risk of letting those threads

2530

// proceed a bit.

2531

2532

{

2533

std::lock_guard<std::recursive_mutex> guard(threads.GetMutex());

2534

2535

size_t num_threads = threads.GetSize();

2536

for (size_t i = 0; i < num_threads; i++) {

2537

ThreadSP thread_sp = threads.GetThreadAtIndex(i);

2538

StopInfoSP stop_info_sp = thread_sp->GetPrivateStopInfo();

2539

StopReason reason = eStopReasonInvalid;

2540

if (stop_info_sp)

2541

reason = stop_info_sp->GetStopReason();

2542

if (reason != eStopReasonBreakpoint &&

2543

reason != eStopReasonException) {

2544

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - Suspending "
"thread: 0x%4.4" "llx" " before running.", thread_sp->GetProtocolID
()); } while (0)

2545

"ProcessGDBRemote::DoDestroy() - Suspending "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - Suspending "
"thread: 0x%4.4" "llx" " before running.", thread_sp->GetProtocolID
()); } while (0)

2546

"thread: 0x%4.4" PRIx64 " before running.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - Suspending "
"thread: 0x%4.4" "llx" " before running.", thread_sp->GetProtocolID
()); } while (0)

2547

thread_sp->GetProtocolID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy() - Suspending "
"thread: 0x%4.4" "llx" " before running.", thread_sp->GetProtocolID
()); } while (0);

2548

thread_sp->SetResumeState(eStateSuspended);

2549

}

2550

}

2551

}

2552

Resume();

2553

return Destroy(false);

2554

}

2555

}

2556

}

2557

}

2558

2559

// Interrupt if our inferior is running...

2560

int exit_status = SIGABRT6;

2561

std::string exit_string;

2562

2563

if (m_gdb_comm.IsConnected()) {

2564

if (m_public_state.GetValue() != eStateAttaching) {

2565

StringExtractorGDBRemote response;

2566

GDBRemoteCommunication::ScopedTimeout(m_gdb_comm,

2567

std::chrono::seconds(3));

2568

2569

if (m_gdb_comm.SendPacketAndWaitForResponse("k", response,

2570

GetInterruptTimeout()) ==

2571

GDBRemoteCommunication::PacketResult::Success) {

2572

char packet_cmd = response.GetChar(0);

2573

2574

if (packet_cmd == 'W' || packet_cmd == 'X') {

2575

#if defined(__APPLE__)

2576

// For Native processes on Mac OS X, we launch through the Host

2577

// Platform, then hand the process off to debugserver, which becomes

2578

// the parent process through "PT_ATTACH". Then when we go to kill

2579

// the process on Mac OS X we call ptrace(PT_KILL) to kill it, then

2580

// we call waitpid which returns with no error and the correct

2581

// status. But amusingly enough that doesn't seem to actually reap

2582

// the process, but instead it is left around as a Zombie. Probably

2583

// the kernel is in the process of switching ownership back to lldb

2584

// which was the original parent, and gets confused in the handoff.

2585

// Anyway, so call waitpid here to finally reap it.

2586

PlatformSP platform_sp(GetTarget().GetPlatform());

2587

if (platform_sp && platform_sp->IsHost()) {

2588

int status;

2589

::pid_t reap_pid;

2590

reap_pid = waitpid(GetID(), &status, WNOHANG);

2591

LLDB_LOGF(log, "Reaped pid: %d, status: %d.\n", reap_pid, status)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Reaped pid: %d, status: %d.\n", reap_pid
, status); } while (0);

2592

}

2593

#endif

2594

SetLastStopPacket(response);

2595

ClearThreadIDList();

2596

exit_status = response.GetHexU8();

2597

} else {

2598

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - got unexpected response "
"to k packet: %s", response.GetStringRef().data()); } while (
0)

2599

"ProcessGDBRemote::DoDestroy - got unexpected response "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - got unexpected response "
"to k packet: %s", response.GetStringRef().data()); } while (
0)

2600

"to k packet: %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - got unexpected response "
"to k packet: %s", response.GetStringRef().data()); } while (
0)

2601

response.GetStringRef().data())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - got unexpected response "
"to k packet: %s", response.GetStringRef().data()); } while (
0);

2602

exit_string.assign("got unexpected response to k packet: ");

2603

exit_string.append(std::string(response.GetStringRef()));

2604

}

2605

} else {

2606

LLDB_LOGF(log, "ProcessGDBRemote::DoDestroy - failed to send k packet")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - failed to send k packet"
); } while (0);

2607

exit_string.assign("failed to send the k packet");

2608

}

2609

} else {

2610

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - killed or interrupted while "
"attaching"); } while (0)

2611

"ProcessGDBRemote::DoDestroy - killed or interrupted while "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - killed or interrupted while "
"attaching"); } while (0)

2612

"attaching")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoDestroy - killed or interrupted while "
"attaching"); } while (0);

2613

exit_string.assign("killed or interrupted while attaching.");

2614

}

2615

} else {

2616

// If we missed setting the exit status on the way out, do it here.

2617

// NB set exit status can be called multiple times, the first one sets the

2618

// status.

2619

exit_string.assign("destroying when not connected to debugserver");

2620

}

2621

2622

SetExitStatus(exit_status, exit_string.c_str());

2623

2624

StopAsyncThread();

2625

KillDebugserverProcess();

2626

return error;

2627

}

2628

2629

void ProcessGDBRemote::SetLastStopPacket(

2630

const StringExtractorGDBRemote &response) {

2631

const bool did_exec =

2632

response.GetStringRef().find(";reason:exec;") != std::string::npos;

2633

if (did_exec) {

2634

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

2635

LLDB_LOGF(log, "ProcessGDBRemote::SetLastStopPacket () - detected exec")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::SetLastStopPacket () - detected exec"
); } while (0);

2636

2637

m_thread_list_real.Clear();

2638

m_thread_list.Clear();

2639

BuildDynamicRegisterInfo(true);

2640

m_gdb_comm.ResetDiscoverableSettings(did_exec);

2641

}

2642

2643

// Scope the lock

2644

{

2645

// Lock the thread stack while we access it

2646

std::lock_guard<std::recursive_mutex> guard(m_last_stop_packet_mutex);

2647

2648

// We are are not using non-stop mode, there can only be one last stop

2649

// reply packet, so clear the list.

2650

if (!GetTarget().GetNonStopModeEnabled())

2651

m_stop_packet_stack.clear();

2652

2653

// Add this stop packet to the stop packet stack This stack will get popped

2654

// and examined when we switch to the Stopped state

2655

m_stop_packet_stack.push_back(response);

2656

}

2657

}

2658

2659

void ProcessGDBRemote::SetUnixSignals(const UnixSignalsSP &signals_sp) {

2660

Process::SetUnixSignals(std::make_shared<GDBRemoteSignals>(signals_sp));

2661

}

2662

2663

// Process Queries

2664

2665

bool ProcessGDBRemote::IsAlive() {

2666

return m_gdb_comm.IsConnected() && Process::IsAlive();

2667

}

2668

2669

addr_t ProcessGDBRemote::GetImageInfoAddress() {

2670

// request the link map address via the $qShlibInfoAddr packet

2671

lldb::addr_t addr = m_gdb_comm.GetShlibInfoAddr();

2672

2673

// the loaded module list can also provides a link map address

2674

if (addr == LLDB_INVALID_ADDRESS0xffffffffffffffffULL) {

2675

llvm::Expected<LoadedModuleInfoList> list = GetLoadedModuleList();

2676

if (!list) {

2677

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

2678

LLDB_LOG_ERROR(log, list.takeError(), "Failed to read module list: {0}.")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (list.takeError()); if (log_private && error_private
) { log_private->FormatError(::std::move(error_private), "/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Failed to read module list: {0}."); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);

2679

} else {

2680

addr = list->m_link_map;

2681

}

2682

}

2683

2684

return addr;

2685

}

2686

2687

void ProcessGDBRemote::WillPublicStop() {

2688

// See if the GDB remote client supports the JSON threads info. If so, we

2689

// gather stop info for all threads, expedited registers, expedited memory,

2690

// runtime queue information (iOS and MacOSX only), and more. Expediting

2691

// memory will help stack backtracing be much faster. Expediting registers

2692

// will make sure we don't have to read the thread registers for GPRs.

2693

m_jthreadsinfo_sp = m_gdb_comm.GetThreadsInfo();

2694

2695

if (m_jthreadsinfo_sp) {

2696

// Now set the stop info for each thread and also expedite any registers

2697

// and memory that was in the jThreadsInfo response.

2698

StructuredData::Array *thread_infos = m_jthreadsinfo_sp->GetAsArray();

2699

if (thread_infos) {

2700

const size_t n = thread_infos->GetSize();

2701

for (size_t i = 0; i < n; ++i) {

2702

StructuredData::Dictionary *thread_dict =

2703

thread_infos->GetItemAtIndex(i)->GetAsDictionary();

2704

if (thread_dict)

2705

SetThreadStopInfo(thread_dict);

2706

}

2707

}

2708

}

2709

}

2710

2711

// Process Memory

2712

size_t ProcessGDBRemote::DoReadMemory(addr_t addr, void *buf, size_t size,

2713

Status &error) {

2714

GetMaxMemorySize();

2715

bool binary_memory_read = m_gdb_comm.GetxPacketSupported();

2716

// M and m packets take 2 bytes for 1 byte of memory

2717

size_t max_memory_size =

2718

binary_memory_read ? m_max_memory_size : m_max_memory_size / 2;

2719

if (size > max_memory_size) {

2720

// Keep memory read sizes down to a sane limit. This function will be

2721

// called multiple times in order to complete the task by

2722

// lldb_private::Process so it is ok to do this.

2723

size = max_memory_size;

2724

}

2725

2726

char packet[64];

2727

int packet_len;

2728

packet_len = ::snprintf(packet, sizeof(packet), "%c%" PRIx64"llx" ",%" PRIx64"llx",

2729

binary_memory_read ? 'x' : 'm', (uint64_t)addr,

2730

(uint64_t)size);

2731

assert(packet_len + 1 < (int)sizeof(packet))((void)0);

2732

UNUSED_IF_ASSERT_DISABLED(packet_len)((void)(packet_len));

2733

StringExtractorGDBRemote response;

2734

if (m_gdb_comm.SendPacketAndWaitForResponse(packet, response,

2735

GetInterruptTimeout()) ==

2736

GDBRemoteCommunication::PacketResult::Success) {

2737

if (response.IsNormalResponse()) {

2738

error.Clear();

2739

if (binary_memory_read) {

2740

// The lower level GDBRemoteCommunication packet receive layer has

2741

// already de-quoted any 0x7d character escaping that was present in

2742

// the packet

2743

2744

size_t data_received_size = response.GetBytesLeft();

2745

if (data_received_size > size) {

2746

// Don't write past the end of BUF if the remote debug server gave us

2747

// too much data for some reason.

2748

data_received_size = size;

2749

}

2750

memcpy(buf, response.GetStringRef().data(), data_received_size);

2751

return data_received_size;

2752

} else {

2753

return response.GetHexBytes(

2754

llvm::MutableArrayRef<uint8_t>((uint8_t *)buf, size), '\xdd');

2755

}

2756

} else if (response.IsErrorResponse())

2757

error.SetErrorStringWithFormat("memory read failed for 0x%" PRIx64"llx", addr);

2758

else if (response.IsUnsupportedResponse())

2759

error.SetErrorStringWithFormat(

2760

"GDB server does not support reading memory");

2761

else

2762

error.SetErrorStringWithFormat(

2763

"unexpected response to GDB server memory read packet '%s': '%s'",

2764

packet, response.GetStringRef().data());

2765

} else {

2766

error.SetErrorStringWithFormat("failed to send packet: '%s'", packet);

2767

}

2768

return 0;

2769

}

2770

2771

bool ProcessGDBRemote::SupportsMemoryTagging() {

2772

return m_gdb_comm.GetMemoryTaggingSupported();

2773

}

2774

2775

llvm::Expected<std::vector<uint8_t>>

2776

ProcessGDBRemote::DoReadMemoryTags(lldb::addr_t addr, size_t len,

2777

int32_t type) {

2778

// By this point ReadMemoryTags has validated that tagging is enabled

2779

// for this target/process/address.

2780

DataBufferSP buffer_sp = m_gdb_comm.ReadMemoryTags(addr, len, type);

2781

if (!buffer_sp) {

2782

return llvm::createStringError(llvm::inconvertibleErrorCode(),

2783

"Error reading memory tags from remote");

2784

}

2785

2786

// Return the raw tag data

2787

llvm::ArrayRef<uint8_t> tag_data = buffer_sp->GetData();

2788

std::vector<uint8_t> got;

2789

got.reserve(tag_data.size());

2790

std::copy(tag_data.begin(), tag_data.end(), std::back_inserter(got));

2791

return got;

2792

}

2793

2794

Status ProcessGDBRemote::DoWriteMemoryTags(lldb::addr_t addr, size_t len,

2795

int32_t type,

2796

const std::vector<uint8_t> &tags) {

2797

// By now WriteMemoryTags should have validated that tagging is enabled

2798

// for this target/process.

2799

return m_gdb_comm.WriteMemoryTags(addr, len, type, tags);

2800

}

2801

2802

Status ProcessGDBRemote::WriteObjectFile(

2803

std::vector<ObjectFile::LoadableData> entries) {

2804

Status error;

2805

// Sort the entries by address because some writes, like those to flash

2806

// memory, must happen in order of increasing address.

2807

std::stable_sort(

2808

std::begin(entries), std::end(entries),

2809

[](const ObjectFile::LoadableData a, const ObjectFile::LoadableData b) {

2810

return a.Dest < b.Dest;

2811

});

2812

m_allow_flash_writes = true;

2813

error = Process::WriteObjectFile(entries);

2814

if (error.Success())

2815

error = FlashDone();

2816

else

2817

// Even though some of the writing failed, try to send a flash done if some

2818

// of the writing succeeded so the flash state is reset to normal, but

2819

// don't stomp on the error status that was set in the write failure since

2820

// that's the one we want to report back.

2821

FlashDone();

2822

m_allow_flash_writes = false;

2823

return error;

2824

}

2825

2826

bool ProcessGDBRemote::HasErased(FlashRange range) {

2827

auto size = m_erased_flash_ranges.GetSize();

2828

for (size_t i = 0; i < size; ++i)

2829

if (m_erased_flash_ranges.GetEntryAtIndex(i)->Contains(range))

2830

return true;

2831

return false;

2832

}

2833

2834

Status ProcessGDBRemote::FlashErase(lldb::addr_t addr, size_t size) {

2835

Status status;

2836

2837

MemoryRegionInfo region;

2838

status = GetMemoryRegionInfo(addr, region);

2839

if (!status.Success())

2840

return status;

2841

2842

// The gdb spec doesn't say if erasures are allowed across multiple regions,

2843

// but we'll disallow it to be safe and to keep the logic simple by worring

2844

// about only one region's block size. DoMemoryWrite is this function's

2845

// primary user, and it can easily keep writes within a single memory region

2846

if (addr + size > region.GetRange().GetRangeEnd()) {

2847

status.SetErrorString("Unable to erase flash in multiple regions");

2848

return status;

2849

}

2850

2851

uint64_t blocksize = region.GetBlocksize();

2852

if (blocksize == 0) {

2853

status.SetErrorString("Unable to erase flash because blocksize is 0");

2854

return status;

2855

}

2856

2857

// Erasures can only be done on block boundary adresses, so round down addr

2858

// and round up size

2859

lldb::addr_t block_start_addr = addr - (addr % blocksize);

2860

size += (addr - block_start_addr);

2861

if ((size % blocksize) != 0)

2862

size += (blocksize - size % blocksize);

2863

2864

FlashRange range(block_start_addr, size);

2865

2866

if (HasErased(range))

2867

return status;

2868

2869

// We haven't erased the entire range, but we may have erased part of it.

2870

// (e.g., block A is already erased and range starts in A and ends in B). So,

2871

// adjust range if necessary to exclude already erased blocks.

2872

if (!m_erased_flash_ranges.IsEmpty()) {

2873

// Assuming that writes and erasures are done in increasing addr order,

2874

// because that is a requirement of the vFlashWrite command. Therefore, we

2875

// only need to look at the last range in the list for overlap.

2876

const auto &last_range = *m_erased_flash_ranges.Back();

2877

if (range.GetRangeBase() < last_range.GetRangeEnd()) {

2878

auto overlap = last_range.GetRangeEnd() - range.GetRangeBase();

2879

// overlap will be less than range.GetByteSize() or else HasErased()

2880

// would have been true

2881

range.SetByteSize(range.GetByteSize() - overlap);

2882

range.SetRangeBase(range.GetRangeBase() + overlap);

2883

}

2884

}

2885

2886

StreamString packet;

2887

packet.Printf("vFlashErase:%" PRIx64"llx" ",%" PRIx64"llx", range.GetRangeBase(),

2888

(uint64_t)range.GetByteSize());

2889

2890

StringExtractorGDBRemote response;

2891

if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response,

2892

GetInterruptTimeout()) ==

2893

GDBRemoteCommunication::PacketResult::Success) {

2894

if (response.IsOKResponse()) {

2895

m_erased_flash_ranges.Insert(range, true);

2896

} else {

2897

if (response.IsErrorResponse())

2898

status.SetErrorStringWithFormat("flash erase failed for 0x%" PRIx64"llx",

2899

addr);

2900

else if (response.IsUnsupportedResponse())

2901

status.SetErrorStringWithFormat("GDB server does not support flashing");

2902

else

2903

status.SetErrorStringWithFormat(

2904

"unexpected response to GDB server flash erase packet '%s': '%s'",

2905

packet.GetData(), response.GetStringRef().data());

2906

}

2907

} else {

2908

status.SetErrorStringWithFormat("failed to send packet: '%s'",

2909

packet.GetData());

2910

}

2911

return status;

2912

}

2913

2914

Status ProcessGDBRemote::FlashDone() {

2915

Status status;

2916

// If we haven't erased any blocks, then we must not have written anything

2917

// either, so there is no need to actually send a vFlashDone command

2918

if (m_erased_flash_ranges.IsEmpty())

2919

return status;

2920

StringExtractorGDBRemote response;

2921

if (m_gdb_comm.SendPacketAndWaitForResponse("vFlashDone", response,

2922

GetInterruptTimeout()) ==

2923

GDBRemoteCommunication::PacketResult::Success) {

2924

if (response.IsOKResponse()) {

2925

m_erased_flash_ranges.Clear();

2926

} else {

2927

if (response.IsErrorResponse())

2928

status.SetErrorStringWithFormat("flash done failed");

2929

else if (response.IsUnsupportedResponse())

2930

status.SetErrorStringWithFormat("GDB server does not support flashing");

2931

else

2932

status.SetErrorStringWithFormat(

2933

"unexpected response to GDB server flash done packet: '%s'",

2934

response.GetStringRef().data());

2935

}

2936

} else {

2937

status.SetErrorStringWithFormat("failed to send flash done packet");

2938

}

2939

return status;

2940

}

2941

2942

size_t ProcessGDBRemote::DoWriteMemory(addr_t addr, const void *buf,

2943

size_t size, Status &error) {

2944

GetMaxMemorySize();

2945

// M and m packets take 2 bytes for 1 byte of memory

2946

size_t max_memory_size = m_max_memory_size / 2;

2947

if (size > max_memory_size) {

2948

// Keep memory read sizes down to a sane limit. This function will be

2949

// called multiple times in order to complete the task by

2950

// lldb_private::Process so it is ok to do this.

2951

size = max_memory_size;

2952

}

2953

2954

StreamGDBRemote packet;

2955

2956

MemoryRegionInfo region;

2957

Status region_status = GetMemoryRegionInfo(addr, region);

2958

2959

bool is_flash =

2960

region_status.Success() && region.GetFlash() == MemoryRegionInfo::eYes;

2961

2962

if (is_flash) {

2963

if (!m_allow_flash_writes) {

2964

error.SetErrorString("Writing to flash memory is not allowed");

2965

return 0;

2966

}

2967

// Keep the write within a flash memory region

2968

if (addr + size > region.GetRange().GetRangeEnd())

2969

size = region.GetRange().GetRangeEnd() - addr;

2970

// Flash memory must be erased before it can be written

2971

error = FlashErase(addr, size);

2972

if (!error.Success())

2973

return 0;

2974

packet.Printf("vFlashWrite:%" PRIx64"llx" ":", addr);

2975

packet.PutEscapedBytes(buf, size);

2976

} else {

2977

packet.Printf("M%" PRIx64"llx" ",%" PRIx64"llx" ":", addr, (uint64_t)size);

2978

packet.PutBytesAsRawHex8(buf, size, endian::InlHostByteOrder(),

2979

endian::InlHostByteOrder());

2980

}

2981

StringExtractorGDBRemote response;

2982

if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response,

2983

GetInterruptTimeout()) ==

2984

GDBRemoteCommunication::PacketResult::Success) {

2985

if (response.IsOKResponse()) {

2986

error.Clear();

2987

return size;

2988

} else if (response.IsErrorResponse())

2989

error.SetErrorStringWithFormat("memory write failed for 0x%" PRIx64"llx",

2990

addr);

2991

else if (response.IsUnsupportedResponse())

2992

error.SetErrorStringWithFormat(

2993

"GDB server does not support writing memory");

2994

else

2995

error.SetErrorStringWithFormat(

2996

"unexpected response to GDB server memory write packet '%s': '%s'",

2997

packet.GetData(), response.GetStringRef().data());

2998

} else {

2999

error.SetErrorStringWithFormat("failed to send packet: '%s'",

3000

packet.GetData());

3001

}

3002

return 0;

3003

}

3004

3005

lldb::addr_t ProcessGDBRemote::DoAllocateMemory(size_t size,

3006

uint32_t permissions,

3007

Status &error) {

3008

Log *log(

3009

GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1) | LIBLLDB_LOG_EXPRESSIONS(1u << 8)));

3010

addr_t allocated_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

3011

3012

if (m_gdb_comm.SupportsAllocDeallocMemory() != eLazyBoolNo) {

3013

allocated_addr = m_gdb_comm.AllocateMemory(size, permissions);

3014

if (allocated_addr != LLDB_INVALID_ADDRESS0xffffffffffffffffULL ||

3015

m_gdb_comm.SupportsAllocDeallocMemory() == eLazyBoolYes)

3016

return allocated_addr;

3017

}

3018

3019

if (m_gdb_comm.SupportsAllocDeallocMemory() == eLazyBoolNo) {

3020

// Call mmap() to create memory in the inferior..

3021

unsigned prot = 0;

3022

if (permissions & lldb::ePermissionsReadable)

3023

prot |= eMmapProtRead;

3024

if (permissions & lldb::ePermissionsWritable)

3025

prot |= eMmapProtWrite;

3026

if (permissions & lldb::ePermissionsExecutable)

3027

prot |= eMmapProtExec;

3028

3029

if (InferiorCallMmap(this, allocated_addr, 0, size, prot,

3030

eMmapFlagsAnon | eMmapFlagsPrivate, -1, 0))

3031

m_addr_to_mmap_size[allocated_addr] = size;

3032

else {

3033

allocated_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

3034

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no direct stub support for memory "
"allocation, and InferiorCallMmap also failed - is stub " "missing register context save/restore capability?"
, __FUNCTION__); } while (0)

3035

"ProcessGDBRemote::%s no direct stub support for memory "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no direct stub support for memory "
"allocation, and InferiorCallMmap also failed - is stub " "missing register context save/restore capability?"
, __FUNCTION__); } while (0)

3036

"allocation, and InferiorCallMmap also failed - is stub "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no direct stub support for memory "
"allocation, and InferiorCallMmap also failed - is stub " "missing register context save/restore capability?"
, __FUNCTION__); } while (0)

3037

"missing register context save/restore capability?",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no direct stub support for memory "
"allocation, and InferiorCallMmap also failed - is stub " "missing register context save/restore capability?"
, __FUNCTION__); } while (0)

3038

__FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s no direct stub support for memory "
"allocation, and InferiorCallMmap also failed - is stub " "missing register context save/restore capability?"
, __FUNCTION__); } while (0);

3039

}

3040

}

3041

3042

if (allocated_addr == LLDB_INVALID_ADDRESS0xffffffffffffffffULL)

3043

error.SetErrorStringWithFormat(

3044

"unable to allocate %" PRIu64"llu" " bytes of memory with permissions %s",

3045

(uint64_t)size, GetPermissionsAsCString(permissions));

3046

else

3047

error.Clear();

3048

return allocated_addr;

3049

}

3050

3051

Status ProcessGDBRemote::GetMemoryRegionInfo(addr_t load_addr,

3052

MemoryRegionInfo &region_info) {

3053

3054

Status error(m_gdb_comm.GetMemoryRegionInfo(load_addr, region_info));

3055

return error;

3056

}

3057

3058

Status ProcessGDBRemote::GetWatchpointSupportInfo(uint32_t &num) {

3059

3060

Status error(m_gdb_comm.GetWatchpointSupportInfo(num));

3061

return error;

3062

}

3063

3064

Status ProcessGDBRemote::GetWatchpointSupportInfo(uint32_t &num, bool &after) {

3065

Status error(m_gdb_comm.GetWatchpointSupportInfo(

3066

num, after, GetTarget().GetArchitecture()));

3067

return error;

3068

}

3069

3070

Status ProcessGDBRemote::DoDeallocateMemory(lldb::addr_t addr) {

3071

Status error;

3072

LazyBool supported = m_gdb_comm.SupportsAllocDeallocMemory();

3073

3074

switch (supported) {

3075

case eLazyBoolCalculate:

3076

// We should never be deallocating memory without allocating memory first

3077

// so we should never get eLazyBoolCalculate

3078

error.SetErrorString(

3079

"tried to deallocate memory without ever allocating memory");

3080

break;

3081

3082

case eLazyBoolYes:

3083

if (!m_gdb_comm.DeallocateMemory(addr))

3084

error.SetErrorStringWithFormat(

3085

"unable to deallocate memory at 0x%" PRIx64"llx", addr);

3086

break;

3087

3088

case eLazyBoolNo:

3089

// Call munmap() to deallocate memory in the inferior..

3090

{

3091

MMapMap::iterator pos = m_addr_to_mmap_size.find(addr);

3092

if (pos != m_addr_to_mmap_size.end() &&

3093

InferiorCallMunmap(this, addr, pos->second))

3094

m_addr_to_mmap_size.erase(pos);

3095

else

3096

error.SetErrorStringWithFormat(

3097

"unable to deallocate memory at 0x%" PRIx64"llx", addr);

3098

}

3099

break;

3100

}

3101

3102

return error;

3103

}

3104

3105

// Process STDIO

3106

size_t ProcessGDBRemote::PutSTDIN(const char *src, size_t src_len,

3107

Status &error) {

3108

if (m_stdio_communication.IsConnected()) {

3109

ConnectionStatus status;

3110

m_stdio_communication.Write(src, src_len, status, nullptr);

3111

} else if (m_stdin_forward) {

3112

m_gdb_comm.SendStdinNotification(src, src_len);

3113

}

3114

return 0;

3115

}

3116

3117

Status ProcessGDBRemote::EnableBreakpointSite(BreakpointSite *bp_site) {

3118

Status error;

3119

assert(bp_site != nullptr)((void)0);

3120

3121

// Get logging info

3122

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS(1u << 7)));

3123

user_id_t site_id = bp_site->GetID();

3124

3125

// Get the breakpoint address

3126

const addr_t addr = bp_site->GetLoadAddress();

3127

3128

// Log that a breakpoint was requested

3129

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx", site_id, (uint64_t)addr); } while
(0)

3130

"ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx", site_id, (uint64_t)addr); } while
(0)

3131

") address = 0x%" PRIx64,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx", site_id, (uint64_t)addr); } while
(0)

3132

site_id, (uint64_t)addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx", site_id, (uint64_t)addr); } while
(0);

3133

3134

// Breakpoint already exists and is enabled

3135

if (bp_site->IsEnabled()) {

3136

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx" " -- SUCCESS (already enabled)"
, site_id, (uint64_t)addr); } while (0)

3137

"ProcessGDBRemote::EnableBreakpointSite (size_id = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx" " -- SUCCESS (already enabled)"
, site_id, (uint64_t)addr); } while (0)

3138

") address = 0x%" PRIx64 " -- SUCCESS (already enabled)",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx" " -- SUCCESS (already enabled)"
, site_id, (uint64_t)addr); } while (0)

3139

site_id, (uint64_t)addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableBreakpointSite (size_id = %"
"llu" ") address = 0x%" "llx" " -- SUCCESS (already enabled)"
, site_id, (uint64_t)addr); } while (0);

3140

return error;

3141

}

3142

3143

// Get the software breakpoint trap opcode size

3144

const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode(bp_site);

3145

3146

// SupportsGDBStoppointPacket() simply checks a boolean, indicating if this

3147

// breakpoint type is supported by the remote stub. These are set to true by

3148

// default, and later set to false only after we receive an unimplemented

3149

// response when sending a breakpoint packet. This means initially that

3150

// unless we were specifically instructed to use a hardware breakpoint, LLDB

3151

// will attempt to set a software breakpoint. HardwareRequired() also queries

3152

// a boolean variable which indicates if the user specifically asked for

3153

// hardware breakpoints. If true then we will skip over software

3154

// breakpoints.

3155

if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware) &&

3156

(!bp_site->HardwareRequired())) {

3157

// Try to send off a software breakpoint packet ($Z0)

3158

uint8_t error_no = m_gdb_comm.SendGDBStoppointTypePacket(

3159

eBreakpointSoftware, true, addr, bp_op_size, GetInterruptTimeout());

3160

if (error_no == 0) {

3161

// The breakpoint was placed successfully

3162

bp_site->SetEnabled(true);

3163

bp_site->SetType(BreakpointSite::eExternal);

3164

return error;

3165

}

3166

3167

// SendGDBStoppointTypePacket() will return an error if it was unable to

3168

// set this breakpoint. We need to differentiate between a error specific

3169

// to placing this breakpoint or if we have learned that this breakpoint

3170

// type is unsupported. To do this, we must test the support boolean for

3171

// this breakpoint type to see if it now indicates that this breakpoint

3172

// type is unsupported. If they are still supported then we should return

3173

// with the error code. If they are now unsupported, then we would like to

3174

// fall through and try another form of breakpoint.

3175

if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointSoftware)) {

3176

if (error_no != UINT8_MAX0xff)

3177

error.SetErrorStringWithFormat(

3178

"error: %d sending the breakpoint request", error_no);

3179

else

3180

error.SetErrorString("error sending the breakpoint request");

3181

return error;

3182

}

3183

3184

// We reach here when software breakpoints have been found to be

3185

// unsupported. For future calls to set a breakpoint, we will not attempt

3186

// to set a breakpoint with a type that is known not to be supported.

3187

LLDB_LOGF(log, "Software breakpoints are unsupported")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Software breakpoints are unsupported"
); } while (0);

3188

3189

// So we will fall through and try a hardware breakpoint

3190

}

3191

3192

// The process of setting a hardware breakpoint is much the same as above.

3193

// We check the supported boolean for this breakpoint type, and if it is

3194

// thought to be supported then we will try to set this breakpoint with a

3195

// hardware breakpoint.

3196

if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) {

3197

// Try to send off a hardware breakpoint packet ($Z1)

3198

uint8_t error_no = m_gdb_comm.SendGDBStoppointTypePacket(

3199

eBreakpointHardware, true, addr, bp_op_size, GetInterruptTimeout());

3200

if (error_no == 0) {

3201

// The breakpoint was placed successfully

3202

bp_site->SetEnabled(true);

3203

bp_site->SetType(BreakpointSite::eHardware);

3204

return error;

3205

}

3206

3207

// Check if the error was something other then an unsupported breakpoint

3208

// type

3209

if (m_gdb_comm.SupportsGDBStoppointPacket(eBreakpointHardware)) {

3210

// Unable to set this hardware breakpoint

3211

if (error_no != UINT8_MAX0xff)

3212

error.SetErrorStringWithFormat(

3213

"error: %d sending the hardware breakpoint request "

3214

"(hardware breakpoint resources might be exhausted or unavailable)",

3215

error_no);

3216

else

3217

error.SetErrorString("error sending the hardware breakpoint request "

3218

"(hardware breakpoint resources "

3219

"might be exhausted or unavailable)");

3220

return error;

3221

}

3222

3223

// We will reach here when the stub gives an unsupported response to a

3224

// hardware breakpoint

3225

LLDB_LOGF(log, "Hardware breakpoints are unsupported")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Hardware breakpoints are unsupported"
); } while (0);

3226

3227

// Finally we will falling through to a #trap style breakpoint

3228

}

3229

3230

// Don't fall through when hardware breakpoints were specifically requested

3231

if (bp_site->HardwareRequired()) {

3232

error.SetErrorString("hardware breakpoints are not supported");

3233

return error;

3234

}

3235

3236

// As a last resort we want to place a manual breakpoint. An instruction is

3237

// placed into the process memory using memory write packets.

3238

return EnableSoftwareBreakpoint(bp_site);

3239

}

3240

3241

Status ProcessGDBRemote::DisableBreakpointSite(BreakpointSite *bp_site) {

3242

Status error;

3243

assert(bp_site != nullptr)((void)0);

3244

addr_t addr = bp_site->GetLoadAddress();

3245

user_id_t site_id = bp_site->GetID();

3246

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_BREAKPOINTS(1u << 7)));

3247

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx", site_id, (uint64_t)addr); } while
(0)

3248

"ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx", site_id, (uint64_t)addr); } while
(0)

3249

") addr = 0x%8.8" PRIx64,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx", site_id, (uint64_t)addr); } while
(0)

3250

site_id, (uint64_t)addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx", site_id, (uint64_t)addr); } while
(0);

3251

3252

if (bp_site->IsEnabled()) {

3253

const size_t bp_op_size = GetSoftwareBreakpointTrapOpcode(bp_site);

3254

3255

BreakpointSite::Type bp_type = bp_site->GetType();

3256

switch (bp_type) {

3257

case BreakpointSite::eSoftware:

3258

error = DisableSoftwareBreakpoint(bp_site);

3259

break;

3260

3261

case BreakpointSite::eHardware:

3262

if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointHardware, false,

3263

addr, bp_op_size,

3264

GetInterruptTimeout()))

3265

error.SetErrorToGenericError();

3266

break;

3267

3268

case BreakpointSite::eExternal: {

3269

if (m_gdb_comm.SendGDBStoppointTypePacket(eBreakpointSoftware, false,

3270

addr, bp_op_size,

3271

GetInterruptTimeout()))

3272

error.SetErrorToGenericError();

3273

} break;

3274

}

3275

if (error.Success())

3276

bp_site->SetEnabled(false);

3277

} else {

3278

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, site_id, (uint64_t)addr); } while (0)

3279

"ProcessGDBRemote::DisableBreakpointSite (site_id = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, site_id, (uint64_t)addr); } while (0)

3280

") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, site_id, (uint64_t)addr); } while (0)

3281

site_id, (uint64_t)addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableBreakpointSite (site_id = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, site_id, (uint64_t)addr); } while (0);

3282

return error;

3283

}

3284

3285

if (error.Success())

3286

error.SetErrorToGenericError();

3287

return error;

3288

}

3289

3290

// Pre-requisite: wp != NULL.

3291

static GDBStoppointType GetGDBStoppointType(Watchpoint *wp) {

3292

assert(wp)((void)0);

3293

bool watch_read = wp->WatchpointRead();

3294

bool watch_write = wp->WatchpointWrite();

3295

3296

// watch_read and watch_write cannot both be false.

3297

assert(watch_read || watch_write)((void)0);

3298

if (watch_read && watch_write)

3299

return eWatchpointReadWrite;

3300

else if (watch_read)

3301

return eWatchpointRead;

3302

else // Must be watch_write, then.

3303

return eWatchpointWrite;

3304

}

3305

3306

Status ProcessGDBRemote::EnableWatchpoint(Watchpoint *wp, bool notify) {

3307

Status error;

3308

if (wp) {

3309

user_id_t watchID = wp->GetID();

3310

addr_t addr = wp->GetLoadAddress();

3311

Log *log(

3312

ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS(1u << 8)));

3313

LLDB_LOGF(log, "ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64 ")",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %"
"llu" ")", watchID); } while (0)

3314

watchID)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %"
"llu" ")", watchID); } while (0);

3315

if (wp->IsEnabled()) {

3316

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %"
"llu" ") addr = 0x%8.8" "llx" ": watchpoint already enabled."
, watchID, (uint64_t)addr); } while (0)

3317

"ProcessGDBRemote::EnableWatchpoint(watchID = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %"
"llu" ") addr = 0x%8.8" "llx" ": watchpoint already enabled."
, watchID, (uint64_t)addr); } while (0)

3318

") addr = 0x%8.8" PRIx64 ": watchpoint already enabled.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %"
"llu" ") addr = 0x%8.8" "llx" ": watchpoint already enabled."
, watchID, (uint64_t)addr); } while (0)

3319

watchID, (uint64_t)addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::EnableWatchpoint(watchID = %"
"llu" ") addr = 0x%8.8" "llx" ": watchpoint already enabled."
, watchID, (uint64_t)addr); } while (0);

3320

return error;

3321

}

3322

3323

GDBStoppointType type = GetGDBStoppointType(wp);

3324

// Pass down an appropriate z/Z packet...

3325

if (m_gdb_comm.SupportsGDBStoppointPacket(type)) {

3326

if (m_gdb_comm.SendGDBStoppointTypePacket(type, true, addr,

3327

wp->GetByteSize(),

3328

GetInterruptTimeout()) == 0) {

3329

wp->SetEnabled(true, notify);

3330

return error;

3331

} else

3332

error.SetErrorString("sending gdb watchpoint packet failed");

3333

} else

3334

error.SetErrorString("watchpoints not supported");

3335

} else {

3336

error.SetErrorString("Watchpoint argument was NULL.");

3337

}

3338

if (error.Success())

3339

error.SetErrorToGenericError();

3340

return error;

3341

}

3342

3343

Status ProcessGDBRemote::DisableWatchpoint(Watchpoint *wp, bool notify) {

3344

Status error;

3345

if (wp) {

3346

user_id_t watchID = wp->GetID();

3347

3348

Log *log(

3349

ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_WATCHPOINTS(1u << 8)));

3350

3351

addr_t addr = wp->GetLoadAddress();

3352

3353

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx", watchID, (uint64_t)addr); } while
(0)

3354

"ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx", watchID, (uint64_t)addr); } while
(0)

3355

") addr = 0x%8.8" PRIx64,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx", watchID, (uint64_t)addr); } while
(0)

3356

watchID, (uint64_t)addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx", watchID, (uint64_t)addr); } while
(0);

3357

3358

if (!wp->IsEnabled()) {

3359

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, watchID, (uint64_t)addr); } while (0)

3360

"ProcessGDBRemote::DisableWatchpoint (watchID = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, watchID, (uint64_t)addr); } while (0)

3361

") addr = 0x%8.8" PRIx64 " -- SUCCESS (already disabled)",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, watchID, (uint64_t)addr); } while (0)

3362

watchID, (uint64_t)addr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DisableWatchpoint (watchID = %"
"llu" ") addr = 0x%8.8" "llx" " -- SUCCESS (already disabled)"
, watchID, (uint64_t)addr); } while (0);

3363

// See also 'class WatchpointSentry' within StopInfo.cpp. This disabling

3364

// attempt might come from the user-supplied actions, we'll route it in

3365

// order for the watchpoint object to intelligently process this action.

3366

wp->SetEnabled(false, notify);

3367

return error;

3368

}

3369

3370

if (wp->IsHardware()) {

3371

GDBStoppointType type = GetGDBStoppointType(wp);

3372

// Pass down an appropriate z/Z packet...

3373

if (m_gdb_comm.SendGDBStoppointTypePacket(type, false, addr,

3374

wp->GetByteSize(),

3375

GetInterruptTimeout()) == 0) {

3376

wp->SetEnabled(false, notify);

3377

return error;

3378

} else

3379

error.SetErrorString("sending gdb watchpoint packet failed");

3380

}

3381

// TODO: clear software watchpoints if we implement them

3382

} else {

3383

error.SetErrorString("Watchpoint argument was NULL.");

3384

}

3385

if (error.Success())

3386

error.SetErrorToGenericError();

3387

return error;

3388

}

3389

3390

void ProcessGDBRemote::Clear() {

3391

m_thread_list_real.Clear();

3392

m_thread_list.Clear();

3393

}

3394

3395

Status ProcessGDBRemote::DoSignal(int signo) {

3396

Status error;

3397

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

3398

LLDB_LOGF(log, "ProcessGDBRemote::DoSignal (signal = %d)", signo)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::DoSignal (signal = %d)"
, signo); } while (0);

3399

3400

if (!m_gdb_comm.SendAsyncSignal(signo, GetInterruptTimeout()))

3401

error.SetErrorStringWithFormat("failed to send signal %i", signo);

3402

return error;

3403

}

3404

3405

Status ProcessGDBRemote::ConnectToReplayServer() {

3406

Status status = m_gdb_replay_server.Connect(m_gdb_comm);

3407

if (status.Fail())

3408

return status;

3409

3410

// Enable replay mode.

3411

m_replay_mode = true;

3412

3413

// Start server thread.

3414

m_gdb_replay_server.StartAsyncThread();

3415

3416

// Start client thread.

3417

StartAsyncThread();

3418

3419

// Do the usual setup.

3420

return ConnectToDebugserver("");

3421

}

3422

3423

Status

3424

ProcessGDBRemote::EstablishConnectionIfNeeded(const ProcessInfo &process_info) {

3425

// Make sure we aren't already connected?

3426

if (m_gdb_comm.IsConnected())

3427

return Status();

3428

3429

PlatformSP platform_sp(GetTarget().GetPlatform());

3430

if (platform_sp && !platform_sp->IsHost())

3431

return Status("Lost debug server connection");

3432

3433

if (repro::Reproducer::Instance().IsReplaying())

3434

return ConnectToReplayServer();

3435

3436

auto error = LaunchAndConnectToDebugserver(process_info);

3437

if (error.Fail()) {

3438

const char *error_string = error.AsCString();

3439

if (error_string == nullptr)

3440

error_string = "unable to launch " DEBUGSERVER_BASENAME"debugserver";

3441

}

3442

return error;

3443

}

3444

#if !defined(_WIN32)

3445

#define USE_SOCKETPAIR_FOR_LOCAL_CONNECTION1 1

3446

#endif

3447

3448

#ifdef USE_SOCKETPAIR_FOR_LOCAL_CONNECTION1

3449

static bool SetCloexecFlag(int fd) {

3450

#if defined(FD_CLOEXEC1)

3451

int flags = ::fcntl(fd, F_GETFD1);

3452

if (flags == -1)

3453

return false;

3454

return (::fcntl(fd, F_SETFD2, flags | FD_CLOEXEC1) == 0);

3455

#else

3456

return false;

3457

#endif

3458

}

3459

#endif

3460

3461

Status ProcessGDBRemote::LaunchAndConnectToDebugserver(

3462

const ProcessInfo &process_info) {

3463

using namespace std::placeholders; // For _1, _2, etc.

3464

3465

Status error;

3466

if (m_debugserver_pid == LLDB_INVALID_PROCESS_ID0) {

3467

// If we locate debugserver, keep that located version around

3468

static FileSpec g_debugserver_file_spec;

3469

3470

ProcessLaunchInfo debugserver_launch_info;

3471

// Make debugserver run in its own session so signals generated by special

3472

// terminal key sequences (^C) don't affect debugserver.

3473

debugserver_launch_info.SetLaunchInSeparateProcessGroup(true);

3474

3475

const std::weak_ptr<ProcessGDBRemote> this_wp =

3476

std::static_pointer_cast<ProcessGDBRemote>(shared_from_this());

3477

debugserver_launch_info.SetMonitorProcessCallback(

3478

std::bind(MonitorDebugserverProcess, this_wp, _1, _2, _3, _4), false);

3479

debugserver_launch_info.SetUserID(process_info.GetUserID());

3480

3481

#if defined(__APPLE__)

3482

// On macOS 11, we need to support x86_64 applications translated to

3483

// arm64. We check whether a binary is translated and spawn the correct

3484

// debugserver accordingly.

3485

int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID,

3486

static_cast<int>(process_info.GetProcessID()) };

3487

struct kinfo_proc processInfo;

3488

size_t bufsize = sizeof(processInfo);

3489

if (sysctl(mib, (unsigned)(sizeof(mib)/sizeof(int)), &processInfo,

3490

&bufsize, NULL__null, 0) == 0 && bufsize > 0) {

3491

if (processInfo.kp_proc.p_flag & P_TRANSLATED) {

3492

FileSpec rosetta_debugserver("/Library/Apple/usr/libexec/oah/debugserver");

3493

debugserver_launch_info.SetExecutableFile(rosetta_debugserver, false);

3494

}

3495

}

3496

#endif

3497

3498

int communication_fd = -1;

3499

#ifdef USE_SOCKETPAIR_FOR_LOCAL_CONNECTION1

3500

// Use a socketpair on non-Windows systems for security and performance

3501

// reasons.

3502

int sockets[2]; /* the pair of socket descriptors */

3503

if (socketpair(AF_UNIX1, SOCK_STREAM1, 0, sockets) == -1) {

3504

error.SetErrorToErrno();

3505

return error;

3506

}

3507

3508

int our_socket = sockets[0];

3509

int gdb_socket = sockets[1];

3510

auto cleanup_our = llvm::make_scope_exit([&]() { close(our_socket); });

3511

auto cleanup_gdb = llvm::make_scope_exit([&]() { close(gdb_socket); });

3512

3513

// Don't let any child processes inherit our communication socket

3514

SetCloexecFlag(our_socket);

3515

communication_fd = gdb_socket;

3516

#endif

3517

3518

error = m_gdb_comm.StartDebugserverProcess(

3519

nullptr, GetTarget().GetPlatform().get(), debugserver_launch_info,

3520

nullptr, nullptr, communication_fd);

3521

3522

if (error.Success())

3523

m_debugserver_pid = debugserver_launch_info.GetProcessID();

3524

else

3525

m_debugserver_pid = LLDB_INVALID_PROCESS_ID0;

3526

3527

if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID0) {

3528

#ifdef USE_SOCKETPAIR_FOR_LOCAL_CONNECTION1

3529

// Our process spawned correctly, we can now set our connection to use

3530

// our end of the socket pair

3531

cleanup_our.release();

3532

m_gdb_comm.SetConnection(

3533

std::make_unique<ConnectionFileDescriptor>(our_socket, true));

3534

#endif

3535

StartAsyncThread();

3536

}

3537

3538

if (error.Fail()) {

3539

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

3540

3541

LLDB_LOGF(log, "failed to start debugserver process: %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("failed to start debugserver process: %s"
, error.AsCString()); } while (0)

3542

error.AsCString())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("failed to start debugserver process: %s"
, error.AsCString()); } while (0);

3543

return error;

3544

}

3545

3546

if (m_gdb_comm.IsConnected()) {

3547

// Finish the connection process by doing the handshake without

3548

// connecting (send NULL URL)

3549

error = ConnectToDebugserver("");

3550

} else {

3551

error.SetErrorString("connection failed");

3552

}

3553

}

3554

return error;

3555

}

3556

3557

bool ProcessGDBRemote::MonitorDebugserverProcess(

3558

std::weak_ptr<ProcessGDBRemote> process_wp, lldb::pid_t debugserver_pid,

3559

bool exited, // True if the process did exit

3560

int signo, // Zero for no signal

3561

int exit_status // Exit value of process if signal is zero

3562

) {

3563

// "debugserver_pid" argument passed in is the process ID for debugserver

3564

// that we are tracking...

3565

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

3566

const bool handled = true;

3567

3568

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s(process_wp, pid=%"
"llu" ", signo=%i (0x%x), exit_status=%i)", __FUNCTION__, debugserver_pid
, signo, signo, exit_status); } while (0)

3569

"ProcessGDBRemote::%s(process_wp, pid=%" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s(process_wp, pid=%"
"llu" ", signo=%i (0x%x), exit_status=%i)", __FUNCTION__, debugserver_pid
, signo, signo, exit_status); } while (0)

3570

", signo=%i (0x%x), exit_status=%i)",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s(process_wp, pid=%"
"llu" ", signo=%i (0x%x), exit_status=%i)", __FUNCTION__, debugserver_pid
, signo, signo, exit_status); } while (0)

3571

__FUNCTION__, debugserver_pid, signo, signo, exit_status)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s(process_wp, pid=%"
"llu" ", signo=%i (0x%x), exit_status=%i)", __FUNCTION__, debugserver_pid
, signo, signo, exit_status); } while (0);

3572

3573

std::shared_ptr<ProcessGDBRemote> process_sp = process_wp.lock();

3574

LLDB_LOGF(log, "ProcessGDBRemote::%s(process = %p)", __FUNCTION__,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s(process = %p)"
, __FUNCTION__, static_cast<void *>(process_sp.get()));
} while (0)

3575

static_cast<void *>(process_sp.get()))do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s(process = %p)"
, __FUNCTION__, static_cast<void *>(process_sp.get()));
} while (0);

3576

if (!process_sp || process_sp->m_debugserver_pid != debugserver_pid)

3577

return handled;

3578

3579

// Sleep for a half a second to make sure our inferior process has time to

3580

// set its exit status before we set it incorrectly when both the debugserver

3581

// and the inferior process shut down.

3582

std::this_thread::sleep_for(std::chrono::milliseconds(500));

3583

3584

// If our process hasn't yet exited, debugserver might have died. If the

3585

// process did exit, then we are reaping it.

3586

const StateType state = process_sp->GetState();

3587

3588

if (state != eStateInvalid && state != eStateUnloaded &&

3589

state != eStateExited && state != eStateDetached) {

3590

char error_str[1024];

3591

if (signo) {

3592

const char *signal_cstr =

3593

process_sp->GetUnixSignals()->GetSignalAsCString(signo);

3594

if (signal_cstr)

3595

::snprintf(error_str, sizeof(error_str),

3596

DEBUGSERVER_BASENAME"debugserver" " died with signal %s", signal_cstr);

3597

else

3598

::snprintf(error_str, sizeof(error_str),

3599

DEBUGSERVER_BASENAME"debugserver" " died with signal %i", signo);

3600

} else {

3601

::snprintf(error_str, sizeof(error_str),

3602

DEBUGSERVER_BASENAME"debugserver" " died with an exit status of 0x%8.8x",

3603

exit_status);

3604

}

3605

3606

process_sp->SetExitStatus(-1, error_str);

3607

}

3608

// Debugserver has exited we need to let our ProcessGDBRemote know that it no

3609

// longer has a debugserver instance

3610

process_sp->m_debugserver_pid = LLDB_INVALID_PROCESS_ID0;

3611

return handled;

3612

}

3613

3614

void ProcessGDBRemote::KillDebugserverProcess() {

3615

m_gdb_comm.Disconnect();

3616

if (m_debugserver_pid != LLDB_INVALID_PROCESS_ID0) {

3617

Host::Kill(m_debugserver_pid, SIGINT2);

3618

m_debugserver_pid = LLDB_INVALID_PROCESS_ID0;

3619

}

3620

}

3621

3622

void ProcessGDBRemote::Initialize() {

3623

static llvm::once_flag g_once_flag;

3624

3625

llvm::call_once(g_once_flag, []() {

3626

PluginManager::RegisterPlugin(GetPluginNameStatic(),

3627

GetPluginDescriptionStatic(), CreateInstance,

3628

DebuggerInitialize);

3629

});

3630

}

3631

3632

void ProcessGDBRemote::DebuggerInitialize(Debugger &debugger) {

3633

if (!PluginManager::GetSettingForProcessPlugin(

3634

debugger, PluginProperties::GetSettingName())) {

3635

const bool is_global_setting = true;

3636

PluginManager::CreateSettingForProcessPlugin(

3637

debugger, GetGlobalPluginProperties()->GetValueProperties(),

3638

ConstString("Properties for the gdb-remote process plug-in."),

3639

is_global_setting);

3640

}

3641

}

3642

3643

bool ProcessGDBRemote::StartAsyncThread() {

3644

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

3645

3646

LLDB_LOGF(log, "ProcessGDBRemote::%s ()", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s ()", __FUNCTION__
); } while (0);

3647

3648

std::lock_guard<std::recursive_mutex> guard(m_async_thread_state_mutex);

3649

if (!m_async_thread.IsJoinable()) {

3650

// Create a thread that watches our internal state and controls which

3651

// events make it to clients (into the DCProcess event queue).

3652

3653

llvm::Expected<HostThread> async_thread = ThreadLauncher::LaunchThread(

3654

"<lldb.process.gdb-remote.async>", ProcessGDBRemote::AsyncThread, this);

3655

if (!async_thread) {

3656

LLDB_LOG_ERROR(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST),do { ::lldb_private::Log *log_private = (lldb_private::GetLogIfAllCategoriesSet
((1u << 14))); ::llvm::Error error_private = (async_thread
.takeError()); if (log_private && error_private) { log_private
->FormatError(::std::move(error_private), "/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "failed to launch host thread: {}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)

3657

async_thread.takeError(),do { ::lldb_private::Log *log_private = (lldb_private::GetLogIfAllCategoriesSet
((1u << 14))); ::llvm::Error error_private = (async_thread
.takeError()); if (log_private && error_private) { log_private
->FormatError(::std::move(error_private), "/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "failed to launch host thread: {}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)

3658

"failed to launch host thread: {}")do { ::lldb_private::Log *log_private = (lldb_private::GetLogIfAllCategoriesSet
((1u << 14))); ::llvm::Error error_private = (async_thread
.takeError()); if (log_private && error_private) { log_private
->FormatError(::std::move(error_private), "/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "failed to launch host thread: {}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);

3659

return false;

3660

}

3661

m_async_thread = *async_thread;

3662

} else

3663

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was "
"already running.", __FUNCTION__); } while (0)

3664

"ProcessGDBRemote::%s () - Called when Async thread was "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was "
"already running.", __FUNCTION__); } while (0)

3665

"already running.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was "
"already running.", __FUNCTION__); } while (0)

3666

__FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was "
"already running.", __FUNCTION__); } while (0);

3667

3668

return m_async_thread.IsJoinable();

3669

}

3670

3671

void ProcessGDBRemote::StopAsyncThread() {

3672

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

3673

3674

LLDB_LOGF(log, "ProcessGDBRemote::%s ()", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s ()", __FUNCTION__
); } while (0);

3675

3676

std::lock_guard<std::recursive_mutex> guard(m_async_thread_state_mutex);

3677

if (m_async_thread.IsJoinable()) {

3678

m_async_broadcaster.BroadcastEvent(eBroadcastBitAsyncThreadShouldExit);

3679

3680

// This will shut down the async thread.

3681

m_gdb_comm.Disconnect(); // Disconnect from the debug server.

3682

3683

// Stop the stdio thread

3684

m_async_thread.Join(nullptr);

3685

m_async_thread.Reset();

3686

} else

3687

LLDB_LOGF(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was not running."
, __FUNCTION__); } while (0)

3688

log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was not running."
, __FUNCTION__); } while (0)

3689

"ProcessGDBRemote::%s () - Called when Async thread was not running.",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was not running."
, __FUNCTION__); } while (0)

3690

__FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s () - Called when Async thread was not running."
, __FUNCTION__); } while (0);

3691

}

3692

3693

bool ProcessGDBRemote::HandleNotifyPacket(StringExtractorGDBRemote &packet) {

3694

// get the packet at a string

3695

const std::string &pkt = std::string(packet.GetStringRef());

3696

// skip %stop:

3697

StringExtractorGDBRemote stop_info(pkt.c_str() + 5);

3698

3699

// pass as a thread stop info packet

3700

SetLastStopPacket(stop_info);

3701

3702

// check for more stop reasons

3703

HandleStopReplySequence();

3704

3705

// if the process is stopped then we need to fake a resume so that we can

3706

// stop properly with the new break. This is possible due to

3707

// SetPrivateState() broadcasting the state change as a side effect.

3708

if (GetPrivateState() == lldb::StateType::eStateStopped) {

3709

SetPrivateState(lldb::StateType::eStateRunning);

3710

}

3711

3712

// since we have some stopped packets we can halt the process

3713

SetPrivateState(lldb::StateType::eStateStopped);

3714

3715

return true;

3716

}

3717

3718

thread_result_t ProcessGDBRemote::AsyncThread(void *arg) {

3719

ProcessGDBRemote *process = (ProcessGDBRemote *)arg;

3720

3721

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

3722

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread starting...", __FUNCTION__, arg, process->
GetID()); } while (0)

3723

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread starting...", __FUNCTION__, arg, process->
GetID()); } while (0)

3724

") thread starting...",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread starting...", __FUNCTION__, arg, process->
GetID()); } while (0)

3725

__FUNCTION__, arg, process->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread starting...", __FUNCTION__, arg, process->
GetID()); } while (0);

3726

3727

EventSP event_sp;

3728

3729

// We need to ignore any packets that come in after we have

3730

// have decided the process has exited. There are some

3731

// situations, for instance when we try to interrupt a running

3732

// process and the interrupt fails, where another packet might

3733

// get delivered after we've decided to give up on the process.

3734

// But once we've decided we are done with the process we will

3735

// not be in a state to do anything useful with new packets.

3736

// So it is safer to simply ignore any remaining packets by

3737

// explicitly checking for eStateExited before reentering the

3738

// fetch loop.

3739

3740

bool done = false;

3741

while (!done && process->GetPrivateState() != eStateExited) {

3742

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__
, arg, process->GetID()); } while (0)

3743

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__
, arg, process->GetID()); } while (0)

3744

") listener.WaitForEvent (NULL, event_sp)...",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__
, arg, process->GetID()); } while (0)

3745

__FUNCTION__, arg, process->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp)...", __FUNCTION__
, arg, process->GetID()); } while (0);

3746

3747

if (process->m_async_listener_sp->GetEvent(event_sp, llvm::None)) {

3748

const uint32_t event_type = event_sp->GetType();

3749

if (event_sp->BroadcasterIs(&process->m_async_broadcaster)) {

3750

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") Got an event of type: %d...", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3751

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") Got an event of type: %d...", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3752

") Got an event of type: %d...",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") Got an event of type: %d...", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3753

__FUNCTION__, arg, process->GetID(), event_type)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") Got an event of type: %d...", __FUNCTION__, arg, process
->GetID(), event_type); } while (0);

3754

3755

switch (event_type) {

3756

case eBroadcastBitAsyncContinue: {

3757

const EventDataBytes *continue_packet =

3758

EventDataBytes::GetEventDataFromEvent(event_sp.get());

3759

3760

if (continue_packet) {

3761

const char *continue_cstr =

3762

(const char *)continue_packet->GetBytes();

3763

const size_t continue_cstr_len = continue_packet->GetByteSize();

3764

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg
, process->GetID(), continue_cstr); } while (0)

3765

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg
, process->GetID(), continue_cstr); } while (0)

3766

") got eBroadcastBitAsyncContinue: %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg
, process->GetID(), continue_cstr); } while (0)

3767

__FUNCTION__, arg, process->GetID(), continue_cstr)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncContinue: %s", __FUNCTION__, arg
, process->GetID(), continue_cstr); } while (0);

3768

3769

if (::strstr(continue_cstr, "vAttach") == nullptr)

3770

process->SetPrivateState(eStateRunning);

3771

StringExtractorGDBRemote response;

3772

3773

// If in Non-Stop-Mode

3774

if (process->GetTarget().GetNonStopModeEnabled()) {

3775

// send the vCont packet

3776

if (!process->GetGDBRemote().SendvContPacket(

3777

llvm::StringRef(continue_cstr, continue_cstr_len),

3778

process->GetInterruptTimeout(), response)) {

3779

// Something went wrong

3780

done = true;

3781

break;

3782

}

3783

}

3784

// If in All-Stop-Mode

3785

else {

3786

StateType stop_state =

3787

process->GetGDBRemote().SendContinuePacketAndWaitForResponse(

3788

*process, *process->GetUnixSignals(),

3789

llvm::StringRef(continue_cstr, continue_cstr_len),

3790

process->GetInterruptTimeout(),

3791

response);

3792

3793

// We need to immediately clear the thread ID list so we are sure

3794

// to get a valid list of threads. The thread ID list might be

3795

// contained within the "response", or the stop reply packet that

3796

// caused the stop. So clear it now before we give the stop reply

3797

// packet to the process using the

3798

// process->SetLastStopPacket()...

3799

process->ClearThreadIDList();

3800

3801

switch (stop_state) {

3802

case eStateStopped:

3803

case eStateCrashed:

3804

case eStateSuspended:

3805

process->SetLastStopPacket(response);

3806

process->SetPrivateState(stop_state);

3807

break;

3808

3809

case eStateExited: {

3810

process->SetLastStopPacket(response);

3811

process->ClearThreadIDList();

3812

response.SetFilePos(1);

3813

3814

int exit_status = response.GetHexU8();

3815

std::string desc_string;

3816

if (response.GetBytesLeft() > 0 &&

3817

response.GetChar('-') == ';') {

3818

llvm::StringRef desc_str;

3819

llvm::StringRef desc_token;

3820

while (response.GetNameColonValue(desc_token, desc_str)) {

3821

if (desc_token != "description")

3822

continue;

3823

StringExtractor extractor(desc_str);

3824

extractor.GetHexByteString(desc_string);

3825

}

3826

}

3827

process->SetExitStatus(exit_status, desc_string.c_str());

3828

done = true;

3829

break;

3830

}

3831

case eStateInvalid: {

3832

// Check to see if we were trying to attach and if we got back

3833

// the "E87" error code from debugserver -- this indicates that

3834

// the process is not debuggable. Return a slightly more

3835

// helpful error message about why the attach failed.

3836

if (::strstr(continue_cstr, "vAttach") != nullptr &&

3837

response.GetError() == 0x87) {

3838

process->SetExitStatus(-1, "cannot attach to process due to "

3839

"System Integrity Protection");

3840

} else if (::strstr(continue_cstr, "vAttach") != nullptr &&

3841

response.GetStatus().Fail()) {

3842

process->SetExitStatus(-1, response.GetStatus().AsCString());

3843

} else {

3844

process->SetExitStatus(-1, "lost connection");

3845

}

3846

done = true;

3847

break;

3848

}

3849

3850

default:

3851

process->SetPrivateState(stop_state);

3852

break;

3853

} // switch(stop_state)

3854

} // else // if in All-stop-mode

3855

} // if (continue_packet)

3856

} // case eBroadcastBitAsyncContinue

3857

break;

3858

3859

case eBroadcastBitAsyncThreadShouldExit:

3860

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__
, arg, process->GetID()); } while (0)

3861

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__
, arg, process->GetID()); } while (0)

3862

") got eBroadcastBitAsyncThreadShouldExit...",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__
, arg, process->GetID()); } while (0)

3863

__FUNCTION__, arg, process->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got eBroadcastBitAsyncThreadShouldExit...", __FUNCTION__
, arg, process->GetID()); } while (0);

3864

done = true;

3865

break;

3866

3867

default:

3868

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3869

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3870

") got unknown event 0x%8.8x",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3871

__FUNCTION__, arg, process->GetID(), event_type)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0);

3872

done = true;

3873

break;

3874

}

3875

} else if (event_sp->BroadcasterIs(&process->m_gdb_comm)) {

3876

switch (event_type) {

3877

case Communication::eBroadcastBitReadThreadDidExit:

3878

process->SetExitStatus(-1, "lost connection");

3879

done = true;

3880

break;

3881

3882

case GDBRemoteCommunication::eBroadcastBitGdbReadThreadGotNotify: {

3883

lldb_private::Event *event = event_sp.get();

3884

const EventDataBytes *continue_packet =

3885

EventDataBytes::GetEventDataFromEvent(event);

3886

StringExtractorGDBRemote notify(

3887

(const char *)continue_packet->GetBytes());

3888

// Hand this over to the process to handle

3889

process->HandleNotifyPacket(notify);

3890

break;

3891

}

3892

3893

default:

3894

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3895

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3896

") got unknown event 0x%8.8x",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0)

3897

__FUNCTION__, arg, process->GetID(), event_type)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") got unknown event 0x%8.8x", __FUNCTION__, arg, process
->GetID(), event_type); } while (0);

3898

done = true;

3899

break;

3900

}

3901

}

3902

} else {

3903

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp) => false"
, __FUNCTION__, arg, process->GetID()); } while (0)

3904

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp) => false"
, __FUNCTION__, arg, process->GetID()); } while (0)

3905

") listener.WaitForEvent (NULL, event_sp) => false",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp) => false"
, __FUNCTION__, arg, process->GetID()); } while (0)

3906

__FUNCTION__, arg, process->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") listener.WaitForEvent (NULL, event_sp) => false"
, __FUNCTION__, arg, process->GetID()); } while (0);

3907

done = true;

3908

}

3909

}

3910

3911

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread exiting...", __FUNCTION__, arg, process->
GetID()); } while (0)

3912

"ProcessGDBRemote::%s (arg = %p, pid = %" PRIu64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread exiting...", __FUNCTION__, arg, process->
GetID()); } while (0)

3913

") thread exiting...",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread exiting...", __FUNCTION__, arg, process->
GetID()); } while (0)

3914

__FUNCTION__, arg, process->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s (arg = %p, pid = %"
"llu" ") thread exiting...", __FUNCTION__, arg, process->
GetID()); } while (0);

3915

3916

return {};

3917

}

3918

3919

// uint32_t

3920

// ProcessGDBRemote::ListProcessesMatchingName (const char *name, StringList

3921

// &matches, std::vector<lldb::pid_t> &pids)

3922

//{

3923

// // If we are planning to launch the debugserver remotely, then we need to

3924

// fire up a debugserver

3925

// // process and ask it for the list of processes. But if we are local, we

3926

// can let the Host do it.

3927

// if (m_local_debugserver)

3928

// {

3929

// return Host::ListProcessesMatchingName (name, matches, pids);

3930

// }

3931

// else

3932

// {

3933

// // FIXME: Implement talking to the remote debugserver.

3934

// return 0;

3935

// }

3936

//

3937

//}

3938

//

3939

bool ProcessGDBRemote::NewThreadNotifyBreakpointHit(

3940

void *baton, StoppointCallbackContext *context, lldb::user_id_t break_id,

3941

lldb::user_id_t break_loc_id) {

3942

// I don't think I have to do anything here, just make sure I notice the new

3943

// thread when it starts to

3944

// run so I can stop it if that's what I want to do.

3945

Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP(1u << 7)));

3946

LLDB_LOGF(log, "Hit New Thread Notification breakpoint.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Hit New Thread Notification breakpoint."
); } while (0);

3947

return false;

3948

}

3949

3950

Status ProcessGDBRemote::UpdateAutomaticSignalFiltering() {

3951

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

3952

LLDB_LOG(log, "Check if need to update ignored signals")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Check if need to update ignored signals"); } while
(0);

3953

3954

// QPassSignals package is not supported by the server, there is no way we

3955

// can ignore any signals on server side.

3956

if (!m_gdb_comm.GetQPassSignalsSupported())

3957

return Status();

3958

3959

// No signals, nothing to send.

3960

if (m_unix_signals_sp == nullptr)

3961

return Status();

3962

3963

// Signals' version hasn't changed, no need to send anything.

3964

uint64_t new_signals_version = m_unix_signals_sp->GetVersion();

3965

if (new_signals_version == m_last_signals_version) {

3966

LLDB_LOG(log, "Signals' version hasn't changed. version={0}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Signals' version hasn't changed. version={0}", m_last_signals_version
); } while (0)

3967

m_last_signals_version)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Signals' version hasn't changed. version={0}", m_last_signals_version
); } while (0);

3968

return Status();

3969

}

3970

3971

auto signals_to_ignore =

3972

m_unix_signals_sp->GetFilteredSignals(false, false, false);

3973

Status error = m_gdb_comm.SendSignalsToIgnore(signals_to_ignore);

3974

3975

LLDB_LOG(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Signals' version changed. old version={0}, new version={1}, "
"signals ignored={2}, update result={3}", m_last_signals_version
, new_signals_version, signals_to_ignore.size(), error); } while
(0)

3976

"Signals' version changed. old version={0}, new version={1}, "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Signals' version changed. old version={0}, new version={1}, "
"signals ignored={2}, update result={3}", m_last_signals_version
, new_signals_version, signals_to_ignore.size(), error); } while
(0)

3977

"signals ignored={2}, update result={3}",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Signals' version changed. old version={0}, new version={1}, "
"signals ignored={2}, update result={3}", m_last_signals_version
, new_signals_version, signals_to_ignore.size(), error); } while
(0)

3978

m_last_signals_version, new_signals_version,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Signals' version changed. old version={0}, new version={1}, "
"signals ignored={2}, update result={3}", m_last_signals_version
, new_signals_version, signals_to_ignore.size(), error); } while
(0)

3979

signals_to_ignore.size(), error)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp"
, __func__, "Signals' version changed. old version={0}, new version={1}, "
"signals ignored={2}, update result={3}", m_last_signals_version
, new_signals_version, signals_to_ignore.size(), error); } while
(0);

3980

3981

if (error.Success())

3982

m_last_signals_version = new_signals_version;

3983

3984

return error;

3985

}

3986

3987

bool ProcessGDBRemote::StartNoticingNewThreads() {

3988

Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP(1u << 7)));

3989

if (m_thread_create_bp_sp) {

3990

if (log && log->GetVerbose())

3991

LLDB_LOGF(log, "Enabled noticing new thread breakpoint.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Enabled noticing new thread breakpoint."
); } while (0);

3992

m_thread_create_bp_sp->SetEnabled(true);

3993

} else {

3994

PlatformSP platform_sp(GetTarget().GetPlatform());

3995

if (platform_sp) {

3996

m_thread_create_bp_sp =

3997

platform_sp->SetThreadCreationBreakpoint(GetTarget());

3998

if (m_thread_create_bp_sp) {

3999

if (log && log->GetVerbose())

4000

LLDB_LOGF(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Successfully created new thread notification breakpoint %i"
, m_thread_create_bp_sp->GetID()); } while (0)

4001

log, "Successfully created new thread notification breakpoint %i",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Successfully created new thread notification breakpoint %i"
, m_thread_create_bp_sp->GetID()); } while (0)

4002

m_thread_create_bp_sp->GetID())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Successfully created new thread notification breakpoint %i"
, m_thread_create_bp_sp->GetID()); } while (0);

4003

m_thread_create_bp_sp->SetCallback(

4004

ProcessGDBRemote::NewThreadNotifyBreakpointHit, this, true);

4005

} else {

4006

LLDB_LOGF(log, "Failed to create new thread notification breakpoint.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Failed to create new thread notification breakpoint."
); } while (0);

4007

}

4008

}

4009

}

4010

return m_thread_create_bp_sp.get() != nullptr;

4011

}

4012

4013

bool ProcessGDBRemote::StopNoticingNewThreads() {

4014

Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_STEP(1u << 7)));

4015

if (log && log->GetVerbose())

4016

LLDB_LOGF(log, "Disabling new thread notification breakpoint.")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Disabling new thread notification breakpoint."
); } while (0);

4017

4018

if (m_thread_create_bp_sp)

4019

m_thread_create_bp_sp->SetEnabled(false);

4020

4021

return true;

4022

}

4023

4024

DynamicLoader *ProcessGDBRemote::GetDynamicLoader() {

4025

if (m_dyld_up.get() == nullptr)

4026

m_dyld_up.reset(DynamicLoader::FindPlugin(this, nullptr));

4027

return m_dyld_up.get();

4028

}

4029

4030

Status ProcessGDBRemote::SendEventData(const char *data) {

4031

int return_value;

4032

bool was_supported;

4033

4034

Status error;

4035

4036

return_value = m_gdb_comm.SendLaunchEventDataPacket(data, &was_supported);

4037

if (return_value != 0) {

4038

if (!was_supported)

4039

error.SetErrorString("Sending events is not supported for this process.");

4040

else

4041

error.SetErrorStringWithFormat("Error sending event data: %d.",

4042

return_value);

4043

}

4044

return error;

4045

}

4046

4047

DataExtractor ProcessGDBRemote::GetAuxvData() {

4048

DataBufferSP buf;

4049

if (m_gdb_comm.GetQXferAuxvReadSupported()) {

4050

std::string response_string;

4051

if (m_gdb_comm.SendPacketsAndConcatenateResponses("qXfer:auxv:read::",

4052

response_string) ==

4053

GDBRemoteCommunication::PacketResult::Success)

4054

buf = std::make_shared<DataBufferHeap>(response_string.c_str(),

4055

response_string.length());

4056

}

4057

return DataExtractor(buf, GetByteOrder(), GetAddressByteSize());

4058

}

4059

4060

StructuredData::ObjectSP

4061

ProcessGDBRemote::GetExtendedInfoForThread(lldb::tid_t tid) {

4062

StructuredData::ObjectSP object_sp;

4063

4064

if (m_gdb_comm.GetThreadExtendedInfoSupported()) {

4065

StructuredData::ObjectSP args_dict(new StructuredData::Dictionary());

4066

SystemRuntime *runtime = GetSystemRuntime();

4067

if (runtime) {

4068

runtime->AddThreadExtendedInfoPacketHints(args_dict);

4069

}

4070

args_dict->GetAsDictionary()->AddIntegerItem("thread", tid);

4071

4072

StreamString packet;

4073

packet << "jThreadExtendedInfo:";

4074

args_dict->Dump(packet, false);

4075

4076

// FIXME the final character of a JSON dictionary, '}', is the escape

4077

// character in gdb-remote binary mode. lldb currently doesn't escape

4078

// these characters in its packet output -- so we add the quoted version of

4079

// the } character here manually in case we talk to a debugserver which un-

4080

// escapes the characters at packet read time.

4081

packet << (char)(0x7d ^ 0x20);

4082

4083

StringExtractorGDBRemote response;

4084

response.SetResponseValidatorToJSON();

4085

if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response) ==

4086

GDBRemoteCommunication::PacketResult::Success) {

4087

StringExtractorGDBRemote::ResponseType response_type =

4088

response.GetResponseType();

4089

if (response_type == StringExtractorGDBRemote::eResponse) {

4090

if (!response.Empty()) {

4091

object_sp =

4092

StructuredData::ParseJSON(std::string(response.GetStringRef()));

4093

}

4094

}

4095

}

4096

}

4097

return object_sp;

4098

}

4099

4100

StructuredData::ObjectSP ProcessGDBRemote::GetLoadedDynamicLibrariesInfos(

4101

lldb::addr_t image_list_address, lldb::addr_t image_count) {

4102

4103

StructuredData::ObjectSP args_dict(new StructuredData::Dictionary());

4104

args_dict->GetAsDictionary()->AddIntegerItem("image_list_address",

4105

image_list_address);

4106

args_dict->GetAsDictionary()->AddIntegerItem("image_count", image_count);

4107

4108

return GetLoadedDynamicLibrariesInfos_sender(args_dict);

4109

}

4110

4111

StructuredData::ObjectSP ProcessGDBRemote::GetLoadedDynamicLibrariesInfos() {

4112

StructuredData::ObjectSP args_dict(new StructuredData::Dictionary());

4113

4114

args_dict->GetAsDictionary()->AddBooleanItem("fetch_all_solibs", true);

4115

4116

return GetLoadedDynamicLibrariesInfos_sender(args_dict);

4117

}

4118

4119

StructuredData::ObjectSP ProcessGDBRemote::GetLoadedDynamicLibrariesInfos(

4120

const std::vector<lldb::addr_t> &load_addresses) {

4121

StructuredData::ObjectSP args_dict(new StructuredData::Dictionary());

4122

StructuredData::ArraySP addresses(new StructuredData::Array);

4123

4124

for (auto addr : load_addresses) {

4125

StructuredData::ObjectSP addr_sp(new StructuredData::Integer(addr));

4126

addresses->AddItem(addr_sp);

4127

}

4128

4129

args_dict->GetAsDictionary()->AddItem("solib_addresses", addresses);

4130

4131

return GetLoadedDynamicLibrariesInfos_sender(args_dict);

4132

}

4133

4134

StructuredData::ObjectSP

4135

ProcessGDBRemote::GetLoadedDynamicLibrariesInfos_sender(

4136

StructuredData::ObjectSP args_dict) {

4137

StructuredData::ObjectSP object_sp;

4138

4139

if (m_gdb_comm.GetLoadedDynamicLibrariesInfosSupported()) {

4140

// Scope for the scoped timeout object

4141

GDBRemoteCommunication::ScopedTimeout timeout(m_gdb_comm,

4142

std::chrono::seconds(10));

4143

4144

StreamString packet;

4145

packet << "jGetLoadedDynamicLibrariesInfos:";

4146

args_dict->Dump(packet, false);

4147

4148

// FIXME the final character of a JSON dictionary, '}', is the escape

4149

// character in gdb-remote binary mode. lldb currently doesn't escape

4150

// these characters in its packet output -- so we add the quoted version of

4151

// the } character here manually in case we talk to a debugserver which un-

4152

// escapes the characters at packet read time.

4153

packet << (char)(0x7d ^ 0x20);

4154

4155

StringExtractorGDBRemote response;

4156

response.SetResponseValidatorToJSON();

4157

if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response) ==

4158

GDBRemoteCommunication::PacketResult::Success) {

4159

StringExtractorGDBRemote::ResponseType response_type =

4160

response.GetResponseType();

4161

if (response_type == StringExtractorGDBRemote::eResponse) {

4162

if (!response.Empty()) {

4163

object_sp =

4164

StructuredData::ParseJSON(std::string(response.GetStringRef()));

4165

}

4166

}

4167

}

4168

}

4169

return object_sp;

4170

}

4171

4172

StructuredData::ObjectSP ProcessGDBRemote::GetSharedCacheInfo() {

4173

StructuredData::ObjectSP object_sp;

4174

StructuredData::ObjectSP args_dict(new StructuredData::Dictionary());

4175

4176

if (m_gdb_comm.GetSharedCacheInfoSupported()) {

4177

StreamString packet;

4178

packet << "jGetSharedCacheInfo:";

4179

args_dict->Dump(packet, false);

4180

4181

// FIXME the final character of a JSON dictionary, '}', is the escape

4182

// character in gdb-remote binary mode. lldb currently doesn't escape

4183

// these characters in its packet output -- so we add the quoted version of

4184

// the } character here manually in case we talk to a debugserver which un-

4185

// escapes the characters at packet read time.

4186

packet << (char)(0x7d ^ 0x20);

4187

4188

StringExtractorGDBRemote response;

4189

response.SetResponseValidatorToJSON();

4190

if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response) ==

4191

GDBRemoteCommunication::PacketResult::Success) {

4192

StringExtractorGDBRemote::ResponseType response_type =

4193

response.GetResponseType();

4194

if (response_type == StringExtractorGDBRemote::eResponse) {

4195

if (!response.Empty()) {

4196

object_sp =

4197

StructuredData::ParseJSON(std::string(response.GetStringRef()));

4198

}

4199

}

4200

}

4201

}

4202

return object_sp;

4203

}

4204

4205

Status ProcessGDBRemote::ConfigureStructuredData(

4206

ConstString type_name, const StructuredData::ObjectSP &config_sp) {

4207

return m_gdb_comm.ConfigureRemoteStructuredData(type_name, config_sp);

4208

}

4209

4210

// Establish the largest memory read/write payloads we should use. If the

4211

// remote stub has a max packet size, stay under that size.

4212

//

4213

// If the remote stub's max packet size is crazy large, use a reasonable

4214

// largeish default.

4215

//

4216

// If the remote stub doesn't advertise a max packet size, use a conservative

4217

// default.

4218

4219

void ProcessGDBRemote::GetMaxMemorySize() {

4220

const uint64_t reasonable_largeish_default = 128 * 1024;

4221

const uint64_t conservative_default = 512;

4222

4223

if (m_max_memory_size == 0) {

4224

uint64_t stub_max_size = m_gdb_comm.GetRemoteMaxPacketSize();

4225

if (stub_max_size != UINT64_MAX0xffffffffffffffffULL && stub_max_size != 0) {

4226

// Save the stub's claimed maximum packet size

4227

m_remote_stub_max_memory_size = stub_max_size;

4228

4229

// Even if the stub says it can support ginormous packets, don't exceed

4230

// our reasonable largeish default packet size.

4231

if (stub_max_size > reasonable_largeish_default) {

4232

stub_max_size = reasonable_largeish_default;

4233

}

4234

4235

// Memory packet have other overheads too like Maddr,size:#NN Instead of

4236

// calculating the bytes taken by size and addr every time, we take a

4237

// maximum guess here.

4238

if (stub_max_size > 70)

4239

stub_max_size -= 32 + 32 + 6;

4240

else {

4241

// In unlikely scenario that max packet size is less then 70, we will

4242

// hope that data being written is small enough to fit.

4243

Log *log(ProcessGDBRemoteLog::GetLogIfAnyCategoryIsSet(

4244

GDBR_LOG_COMM(1u << 10) | GDBR_LOG_MEMORY(1u << 4)));

4245

if (log)

4246

log->Warning("Packet size is too small. "

4247

"LLDB may face problems while writing memory");

4248

}

4249

4250

m_max_memory_size = stub_max_size;

4251

} else {

4252

m_max_memory_size = conservative_default;

4253

}

4254

}

4255

}

4256

4257

void ProcessGDBRemote::SetUserSpecifiedMaxMemoryTransferSize(

4258

uint64_t user_specified_max) {

4259

if (user_specified_max != 0) {

4260

GetMaxMemorySize();

4261

4262

if (m_remote_stub_max_memory_size != 0) {

4263

if (m_remote_stub_max_memory_size < user_specified_max) {

4264

m_max_memory_size = m_remote_stub_max_memory_size; // user specified a

4265

// packet size too

4266

// big, go as big

4267

// as the remote stub says we can go.

4268

} else {

4269

m_max_memory_size = user_specified_max; // user's packet size is good

4270

}

4271

} else {

4272

m_max_memory_size =

4273

user_specified_max; // user's packet size is probably fine

4274

}

4275

}

4276

}

4277

4278

bool ProcessGDBRemote::GetModuleSpec(const FileSpec &module_file_spec,

4279

const ArchSpec &arch,

4280

ModuleSpec &module_spec) {

4281

Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PLATFORM(1u << 25));

4282

4283

const ModuleCacheKey key(module_file_spec.GetPath(),

4284

arch.GetTriple().getTriple());

4285

auto cached = m_cached_module_specs.find(key);

4286

if (cached != m_cached_module_specs.end()) {

4287

module_spec = cached->second;

4288

return bool(module_spec);

4289

}

4290

4291

if (!m_gdb_comm.GetModuleInfo(module_file_spec, arch, module_spec)) {

4292

LLDB_LOGF(log, "ProcessGDBRemote::%s - failed to get module info for %s:%s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s - failed to get module info for %s:%s"
, __FUNCTION__, module_file_spec.GetPath().c_str(), arch.GetTriple
().getTriple().c_str()); } while (0)

4293

__FUNCTION__, module_file_spec.GetPath().c_str(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s - failed to get module info for %s:%s"
, __FUNCTION__, module_file_spec.GetPath().c_str(), arch.GetTriple
().getTriple().c_str()); } while (0)

4294

arch.GetTriple().getTriple().c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s - failed to get module info for %s:%s"
, __FUNCTION__, module_file_spec.GetPath().c_str(), arch.GetTriple
().getTriple().c_str()); } while (0);

4295

return false;

4296

}

4297

4298

if (log) {

4299

StreamString stream;

4300

module_spec.Dump(stream);

4301

LLDB_LOGF(log, "ProcessGDBRemote::%s - got module info for (%s:%s) : %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s - got module info for (%s:%s) : %s"
, __FUNCTION__, module_file_spec.GetPath().c_str(), arch.GetTriple
().getTriple().c_str(), stream.GetData()); } while (0)

4302

__FUNCTION__, module_file_spec.GetPath().c_str(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s - got module info for (%s:%s) : %s"
, __FUNCTION__, module_file_spec.GetPath().c_str(), arch.GetTriple
().getTriple().c_str(), stream.GetData()); } while (0)

4303

arch.GetTriple().getTriple().c_str(), stream.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s - got module info for (%s:%s) : %s"
, __FUNCTION__, module_file_spec.GetPath().c_str(), arch.GetTriple
().getTriple().c_str(), stream.GetData()); } while (0);

4304

}

4305

4306

m_cached_module_specs[key] = module_spec;

4307

return true;

4308

}

4309

4310

void ProcessGDBRemote::PrefetchModuleSpecs(

4311

llvm::ArrayRef<FileSpec> module_file_specs, const llvm::Triple &triple) {

4312

auto module_specs = m_gdb_comm.GetModulesInfo(module_file_specs, triple);

4313

if (module_specs) {

4314

for (const FileSpec &spec : module_file_specs)

4315

m_cached_module_specs[ModuleCacheKey(spec.GetPath(),

4316

triple.getTriple())] = ModuleSpec();

4317

for (const ModuleSpec &spec : *module_specs)

4318

m_cached_module_specs[ModuleCacheKey(spec.GetFileSpec().GetPath(),

4319

triple.getTriple())] = spec;

4320

}

4321

}

4322

4323

llvm::VersionTuple ProcessGDBRemote::GetHostOSVersion() {

4324

return m_gdb_comm.GetOSVersion();

4325

}

4326

4327

llvm::VersionTuple ProcessGDBRemote::GetHostMacCatalystVersion() {

4328

return m_gdb_comm.GetMacCatalystVersion();

4329

}

4330

4331

namespace {

4332

4333

typedef std::vector<std::string> stringVec;

4334

4335

typedef std::vector<struct GdbServerRegisterInfo> GDBServerRegisterVec;

4336

struct RegisterSetInfo {

4337

ConstString name;

4338

};

4339

4340

typedef std::map<uint32_t, RegisterSetInfo> RegisterSetMap;

4341

4342

struct GdbServerTargetInfo {

4343

std::string arch;

4344

std::string osabi;

4345

stringVec includes;

4346

RegisterSetMap reg_set_map;

4347

};

4348

4349

bool ParseRegisters(XMLNode feature_node, GdbServerTargetInfo &target_info,

4350

GDBRemoteDynamicRegisterInfo &dyn_reg_info, ABISP abi_sp,

4351

uint32_t &reg_num_remote, uint32_t &reg_num_local) {

4352

if (!feature_node)

4353

return false;

4354

4355

uint32_t reg_offset = LLDB_INVALID_INDEX320xffffffffU;

4356

feature_node.ForEachChildElementWithName(

4357

"reg", [&target_info, &dyn_reg_info, &reg_num_remote, &reg_num_local,

4358

&reg_offset, &abi_sp](const XMLNode &reg_node) -> bool {

4359

std::string gdb_group;

4360

std::string gdb_type;

4361

ConstString reg_name;

4362

ConstString alt_name;

4363

ConstString set_name;

4364

std::vector<uint32_t> value_regs;

4365

std::vector<uint32_t> invalidate_regs;

4366

std::vector<uint8_t> dwarf_opcode_bytes;

4367

bool encoding_set = false;

4368

bool format_set = false;

4369

RegisterInfo reg_info = {

4370

nullptr, // Name

4371

nullptr, // Alt name

4372

0, // byte size

4373

reg_offset, // offset

4374

eEncodingUint, // encoding

4375

eFormatHex, // format

4376

{

4377

LLDB_INVALID_REGNUM0xffffffffU, // eh_frame reg num

4378

LLDB_INVALID_REGNUM0xffffffffU, // DWARF reg num

4379

LLDB_INVALID_REGNUM0xffffffffU, // generic reg num

4380

reg_num_remote, // process plugin reg num

4381

reg_num_local // native register number

4382

},

4383

nullptr,

4384

nullptr,

4385

nullptr, // Dwarf Expression opcode bytes pointer

4386

0 // Dwarf Expression opcode bytes length

4387

};

4388

4389

reg_node.ForEachAttribute([&target_info, &gdb_group, &gdb_type,

4390

&reg_name, &alt_name, &set_name, &value_regs,

4391

&invalidate_regs, &encoding_set, &format_set,

4392

&reg_info, &reg_offset, &dwarf_opcode_bytes](

4393

const llvm::StringRef &name,

4394

const llvm::StringRef &value) -> bool {

4395

if (name == "name") {

4396

reg_name.SetString(value);

4397

} else if (name == "bitsize") {

4398

reg_info.byte_size =

4399

StringConvert::ToUInt32(value.data(), 0, 0) / CHAR_BIT8;

4400

} else if (name == "type") {

4401

gdb_type = value.str();

4402

} else if (name == "group") {

4403

gdb_group = value.str();

4404

} else if (name == "regnum") {

4405

const uint32_t regnum =

4406

StringConvert::ToUInt32(value.data(), LLDB_INVALID_REGNUM0xffffffffU, 0);

4407

if (regnum != LLDB_INVALID_REGNUM0xffffffffU) {

4408

reg_info.kinds[eRegisterKindProcessPlugin] = regnum;

4409

}

4410

} else if (name == "offset") {

4411

reg_offset = StringConvert::ToUInt32(value.data(), UINT32_MAX0xffffffffU, 0);

4412

} else if (name == "altname") {

4413

alt_name.SetString(value);

4414

} else if (name == "encoding") {

4415

encoding_set = true;

4416

reg_info.encoding = Args::StringToEncoding(value, eEncodingUint);

4417

} else if (name == "format") {

4418

format_set = true;

4419

Format format = eFormatInvalid;

4420

if (OptionArgParser::ToFormat(value.data(), format, nullptr)

4421

.Success())

4422

reg_info.format = format;

4423

else if (value == "vector-sint8")

4424

reg_info.format = eFormatVectorOfSInt8;

4425

else if (value == "vector-uint8")

4426

reg_info.format = eFormatVectorOfUInt8;

4427

else if (value == "vector-sint16")

4428

reg_info.format = eFormatVectorOfSInt16;

4429

else if (value == "vector-uint16")

4430

reg_info.format = eFormatVectorOfUInt16;

4431

else if (value == "vector-sint32")

4432

reg_info.format = eFormatVectorOfSInt32;

4433

else if (value == "vector-uint32")

4434

reg_info.format = eFormatVectorOfUInt32;

4435

else if (value == "vector-float32")

4436

reg_info.format = eFormatVectorOfFloat32;

4437

else if (value == "vector-uint64")

4438

reg_info.format = eFormatVectorOfUInt64;

4439

else if (value == "vector-uint128")

4440

reg_info.format = eFormatVectorOfUInt128;

4441

} else if (name == "group_id") {

4442

const uint32_t set_id =

4443

StringConvert::ToUInt32(value.data(), UINT32_MAX0xffffffffU, 0);

4444

RegisterSetMap::const_iterator pos =

4445

target_info.reg_set_map.find(set_id);

4446

if (pos != target_info.reg_set_map.end())

4447

set_name = pos->second.name;

4448

} else if (name == "gcc_regnum" || name == "ehframe_regnum") {

4449

reg_info.kinds[eRegisterKindEHFrame] =

4450

StringConvert::ToUInt32(value.data(), LLDB_INVALID_REGNUM0xffffffffU, 0);

4451

} else if (name == "dwarf_regnum") {

4452

reg_info.kinds[eRegisterKindDWARF] =

4453

StringConvert::ToUInt32(value.data(), LLDB_INVALID_REGNUM0xffffffffU, 0);

4454

} else if (name == "generic") {

4455

reg_info.kinds[eRegisterKindGeneric] =

4456

Args::StringToGenericRegister(value);

4457

} else if (name == "value_regnums") {

4458

SplitCommaSeparatedRegisterNumberString(value, value_regs, 0);

4459

} else if (name == "invalidate_regnums") {

4460

SplitCommaSeparatedRegisterNumberString(value, invalidate_regs, 0);

4461

} else if (name == "dynamic_size_dwarf_expr_bytes") {

4462

std::string opcode_string = value.str();

4463

size_t dwarf_opcode_len = opcode_string.length() / 2;

4464

assert(dwarf_opcode_len > 0)((void)0);

4465

4466

dwarf_opcode_bytes.resize(dwarf_opcode_len);

4467

reg_info.dynamic_size_dwarf_len = dwarf_opcode_len;

4468

StringExtractor opcode_extractor(opcode_string);

4469

uint32_t ret_val =

4470

opcode_extractor.GetHexBytesAvail(dwarf_opcode_bytes);

4471

assert(dwarf_opcode_len == ret_val)((void)0);

4472

UNUSED_IF_ASSERT_DISABLED(ret_val)((void)(ret_val));

4473

reg_info.dynamic_size_dwarf_expr_bytes = dwarf_opcode_bytes.data();

4474

} else {

4475

printf("unhandled attribute %s = %s\n", name.data(), value.data());

4476

}

4477

return true; // Keep iterating through all attributes

4478

});

4479

4480

if (!gdb_type.empty() && !(encoding_set || format_set)) {

4481

if (llvm::StringRef(gdb_type).startswith("int")) {

4482

reg_info.format = eFormatHex;

4483

reg_info.encoding = eEncodingUint;

4484

} else if (gdb_type == "data_ptr" || gdb_type == "code_ptr") {

4485

reg_info.format = eFormatAddressInfo;

4486

reg_info.encoding = eEncodingUint;

4487

} else if (gdb_type == "i387_ext" || gdb_type == "float") {

4488

reg_info.format = eFormatFloat;

4489

reg_info.encoding = eEncodingIEEE754;

4490

}

4491

}

4492

4493

// Only update the register set name if we didn't get a "reg_set"

4494

// attribute. "set_name" will be empty if we didn't have a "reg_set"

4495

// attribute.

4496

if (!set_name) {

4497

if (!gdb_group.empty()) {

4498

set_name.SetCString(gdb_group.c_str());

4499

} else {

4500

// If no register group name provided anywhere,

4501

// we'll create a 'general' register set

4502

set_name.SetCString("general");

4503

}

4504

}

4505

4506

reg_info.byte_offset = reg_offset;

4507

assert(reg_info.byte_size != 0)((void)0);

4508

reg_offset = LLDB_INVALID_INDEX320xffffffffU;

4509

if (!value_regs.empty()) {

4510

value_regs.push_back(LLDB_INVALID_REGNUM0xffffffffU);

4511

reg_info.value_regs = value_regs.data();

4512

}

4513

if (!invalidate_regs.empty()) {

4514

invalidate_regs.push_back(LLDB_INVALID_REGNUM0xffffffffU);

4515

reg_info.invalidate_regs = invalidate_regs.data();

4516

}

4517

4518

reg_num_remote = reg_info.kinds[eRegisterKindProcessPlugin] + 1;

4519

++reg_num_local;

4520

reg_info.name = reg_name.AsCString();

4521

if (abi_sp)

4522

abi_sp->AugmentRegisterInfo(reg_info);

4523

dyn_reg_info.AddRegister(reg_info, reg_name, alt_name, set_name);

4524

4525

return true; // Keep iterating through all "reg" elements

4526

});

4527

return true;

4528

}

4529

4530

} // namespace

4531

4532

// This method fetches a register description feature xml file from

4533

// the remote stub and adds registers/register groupsets/architecture

4534

// information to the current process. It will call itself recursively

4535

// for nested register definition files. It returns true if it was able

4536

// to fetch and parse an xml file.

4537

bool ProcessGDBRemote::GetGDBServerRegisterInfoXMLAndProcess(

4538

ArchSpec &arch_to_use, std::string xml_filename, uint32_t &reg_num_remote,

4539

uint32_t &reg_num_local) {

4540

// request the target xml file

4541

std::string raw;

4542

lldb_private::Status lldberr;

4543

if (!m_gdb_comm.ReadExtFeature(ConstString("features"),

4544

ConstString(xml_filename.c_str()), raw,

4545

lldberr)) {

4546

return false;

4547

}

4548

4549

XMLDocument xml_document;

4550

4551

if (xml_document.ParseMemory(raw.c_str(), raw.size(), xml_filename.c_str())) {

4552

GdbServerTargetInfo target_info;

4553

std::vector<XMLNode> feature_nodes;

4554

4555

// The top level feature XML file will start with a <target> tag.

4556

XMLNode target_node = xml_document.GetRootElement("target");

4557

if (target_node) {

4558

target_node.ForEachChildElement([&target_info, &feature_nodes](

4559

const XMLNode &node) -> bool {

4560

llvm::StringRef name = node.GetName();

4561

if (name == "architecture") {

4562

node.GetElementText(target_info.arch);

4563

} else if (name == "osabi") {

4564

node.GetElementText(target_info.osabi);

4565

} else if (name == "xi:include" || name == "include") {

4566

llvm::StringRef href = node.GetAttributeValue("href");

4567

if (!href.empty())

4568

target_info.includes.push_back(href.str());

4569

} else if (name == "feature") {

4570

feature_nodes.push_back(node);

4571

} else if (name == "groups") {

4572

node.ForEachChildElementWithName(

4573

"group", [&target_info](const XMLNode &node) -> bool {

4574

uint32_t set_id = UINT32_MAX0xffffffffU;

4575

RegisterSetInfo set_info;

4576

4577

node.ForEachAttribute(

4578

[&set_id, &set_info](const llvm::StringRef &name,

4579

const llvm::StringRef &value) -> bool {

4580

if (name == "id")

4581

set_id = StringConvert::ToUInt32(value.data(),

4582

UINT32_MAX0xffffffffU, 0);

4583

if (name == "name")

4584

set_info.name = ConstString(value);

4585

return true; // Keep iterating through all attributes

4586

});

4587

4588

if (set_id != UINT32_MAX0xffffffffU)

4589

target_info.reg_set_map[set_id] = set_info;

4590

return true; // Keep iterating through all "group" elements

4591

});

4592

}

4593

return true; // Keep iterating through all children of the target_node

4594

});

4595

} else {

4596

// In an included XML feature file, we're already "inside" the <target>

4597

// tag of the initial XML file; this included file will likely only have

4598

// a <feature> tag. Need to check for any more included files in this

4599

// <feature> element.

4600

XMLNode feature_node = xml_document.GetRootElement("feature");

4601

if (feature_node) {

4602

feature_nodes.push_back(feature_node);

4603

feature_node.ForEachChildElement([&target_info](

4604

const XMLNode &node) -> bool {

4605

llvm::StringRef name = node.GetName();

4606

if (name == "xi:include" || name == "include") {

4607

llvm::StringRef href = node.GetAttributeValue("href");

4608

if (!href.empty())

4609

target_info.includes.push_back(href.str());

4610

}

4611

return true;

4612

});

4613

}

4614

}

4615

4616

// If the target.xml includes an architecture entry like

4617

// <architecture>i386:x86-64</architecture> (seen from VMWare ESXi)

4618

// <architecture>arm</architecture> (seen from Segger JLink on unspecified arm board)

4619

// use that if we don't have anything better.

4620

if (!arch_to_use.IsValid() && !target_info.arch.empty()) {

4621

if (target_info.arch == "i386:x86-64") {

4622

// We don't have any information about vendor or OS.

4623

arch_to_use.SetTriple("x86_64--");

4624

GetTarget().MergeArchitecture(arch_to_use);

4625

}

4626

4627

// SEGGER J-Link jtag boards send this very-generic arch name,

4628

// we'll need to use this if we have absolutely nothing better

4629

// to work with or the register definitions won't be accepted.

4630

if (target_info.arch == "arm") {

4631

arch_to_use.SetTriple("arm--");

4632

GetTarget().MergeArchitecture(arch_to_use);

4633

}

4634

}

4635

4636

if (arch_to_use.IsValid()) {

4637

// Don't use Process::GetABI, this code gets called from DidAttach, and

4638

// in that context we haven't set the Target's architecture yet, so the

4639

// ABI is also potentially incorrect.

4640

ABISP abi_to_use_sp = ABI::FindPlugin(shared_from_this(), arch_to_use);

4641

for (auto &feature_node : feature_nodes) {

4642

ParseRegisters(feature_node, target_info, *this->m_register_info_sp,

4643

abi_to_use_sp, reg_num_remote, reg_num_local);

4644

}

4645

4646

for (const auto &include : target_info.includes) {

4647

GetGDBServerRegisterInfoXMLAndProcess(arch_to_use, include,

4648

reg_num_remote, reg_num_local);

4649

}

4650

}

4651

} else {

4652

return false;

4653

}

4654

return true;

4655

}

4656

4657

// query the target of gdb-remote for extended target information returns

4658

// true on success (got register definitions), false on failure (did not).

4659

bool ProcessGDBRemote::GetGDBServerRegisterInfo(ArchSpec &arch_to_use) {

4660

// Make sure LLDB has an XML parser it can use first

4661

if (!XMLDocument::XMLEnabled())

4662

return false;

4663

4664

// check that we have extended feature read support

4665

if (!m_gdb_comm.GetQXferFeaturesReadSupported())

4666

return false;

4667

4668

uint32_t reg_num_remote = 0;

4669

uint32_t reg_num_local = 0;

4670

if (GetGDBServerRegisterInfoXMLAndProcess(arch_to_use, "target.xml",

4671

reg_num_remote, reg_num_local))

4672

this->m_register_info_sp->Finalize(arch_to_use);

4673

4674

return m_register_info_sp->GetNumRegisters() > 0;

4675

}

4676

4677

llvm::Expected<LoadedModuleInfoList> ProcessGDBRemote::GetLoadedModuleList() {

4678

// Make sure LLDB has an XML parser it can use first

4679

if (!XMLDocument::XMLEnabled())

4680

return llvm::createStringError(llvm::inconvertibleErrorCode(),

4681

"XML parsing not available");

4682

4683

Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS(1u << 1));

4684

LLDB_LOGF(log, "ProcessGDBRemote::%s", __FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s", __FUNCTION__
); } while (0);

4685

4686

LoadedModuleInfoList list;

4687

GDBRemoteCommunicationClient &comm = m_gdb_comm;

4688

bool can_use_svr4 = GetGlobalPluginProperties()->GetUseSVR4();

4689

4690

// check that we have extended feature read support

4691

if (can_use_svr4 && comm.GetQXferLibrariesSVR4ReadSupported()) {

4692

// request the loaded library list

4693

std::string raw;

4694

lldb_private::Status lldberr;

4695

4696

if (!comm.ReadExtFeature(ConstString("libraries-svr4"), ConstString(""),

4697

raw, lldberr))

4698

return llvm::createStringError(llvm::inconvertibleErrorCode(),

4699

"Error in libraries-svr4 packet");

4700

4701

// parse the xml file in memory

4702

LLDB_LOGF(log, "parsing: %s", raw.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("parsing: %s", raw.c_str()); } while
(0);

4703

XMLDocument doc;

4704

4705

if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml"))

4706

return llvm::createStringError(llvm::inconvertibleErrorCode(),

4707

"Error reading noname.xml");

4708

4709

XMLNode root_element = doc.GetRootElement("library-list-svr4");

4710

if (!root_element)

4711

return llvm::createStringError(

4712

llvm::inconvertibleErrorCode(),

4713

"Error finding library-list-svr4 xml element");

4714

4715

// main link map structure

4716

llvm::StringRef main_lm = root_element.GetAttributeValue("main-lm");

4717

if (!main_lm.empty()) {

4718

list.m_link_map =

4719

StringConvert::ToUInt64(main_lm.data(), LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 0);

4720

}

4721

4722

root_element.ForEachChildElementWithName(

4723

"library", [log, &list](const XMLNode &library) -> bool {

4724

4725

LoadedModuleInfoList::LoadedModuleInfo module;

4726

4727

library.ForEachAttribute(

4728

[&module](const llvm::StringRef &name,

4729

const llvm::StringRef &value) -> bool {

4730

4731

if (name == "name")

4732

module.set_name(value.str());

4733

else if (name == "lm") {

4734

// the address of the link_map struct.

4735

module.set_link_map(StringConvert::ToUInt64(

4736

value.data(), LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 0));

4737

} else if (name == "l_addr") {

4738

// the displacement as read from the field 'l_addr' of the

4739

// link_map struct.

4740

module.set_base(StringConvert::ToUInt64(

4741

value.data(), LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 0));

4742

// base address is always a displacement, not an absolute

4743

// value.

4744

module.set_base_is_offset(true);

4745

} else if (name == "l_ld") {

4746

// the memory address of the libraries PT_DYNAMIC section.

4747

module.set_dynamic(StringConvert::ToUInt64(

4748

value.data(), LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 0));

4749

}

4750

4751

return true; // Keep iterating over all properties of "library"

4752

});

4753

4754

if (log) {

4755

std::string name;

4756

lldb::addr_t lm = 0, base = 0, ld = 0;

4757

bool base_is_offset;

4758

4759

module.get_name(name);

4760

module.get_link_map(lm);

4761

module.get_base(base);

4762

module.get_base_is_offset(base_is_offset);

4763

module.get_dynamic(ld);

4764

4765

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found (link_map:0x%08" "llx" ", base:0x%08"
"llx" "[%s], ld:0x%08" "llx" ", name:'%s')", lm, base, (base_is_offset
? "offset" : "absolute"), ld, name.c_str()); } while (0)

4766

"found (link_map:0x%08" PRIx64 ", base:0x%08" PRIx64do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found (link_map:0x%08" "llx" ", base:0x%08"
"llx" "[%s], ld:0x%08" "llx" ", name:'%s')", lm, base, (base_is_offset
? "offset" : "absolute"), ld, name.c_str()); } while (0)

4767

"[%s], ld:0x%08" PRIx64 ", name:'%s')",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found (link_map:0x%08" "llx" ", base:0x%08"
"llx" "[%s], ld:0x%08" "llx" ", name:'%s')", lm, base, (base_is_offset
? "offset" : "absolute"), ld, name.c_str()); } while (0)

4768

lm, base, (base_is_offset ? "offset" : "absolute"), ld,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found (link_map:0x%08" "llx" ", base:0x%08"
"llx" "[%s], ld:0x%08" "llx" ", name:'%s')", lm, base, (base_is_offset
? "offset" : "absolute"), ld, name.c_str()); } while (0)

4769

name.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found (link_map:0x%08" "llx" ", base:0x%08"
"llx" "[%s], ld:0x%08" "llx" ", name:'%s')", lm, base, (base_is_offset
? "offset" : "absolute"), ld, name.c_str()); } while (0);

4770

}

4771

4772

list.add(module);

4773

return true; // Keep iterating over all "library" elements in the root

4774

// node

4775

});

4776

4777

if (log)

4778

LLDB_LOGF(log, "found %" PRId32 " modules in total",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found %" "d" " modules in total", (
int)list.m_list.size()); } while (0)

4779

(int)list.m_list.size())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found %" "d" " modules in total", (
int)list.m_list.size()); } while (0);

4780

return list;

4781

} else if (comm.GetQXferLibrariesReadSupported()) {

4782

// request the loaded library list

4783

std::string raw;

4784

lldb_private::Status lldberr;

4785

4786

if (!comm.ReadExtFeature(ConstString("libraries"), ConstString(""), raw,

4787

lldberr))

4788

return llvm::createStringError(llvm::inconvertibleErrorCode(),

4789

"Error in libraries packet");

4790

4791

LLDB_LOGF(log, "parsing: %s", raw.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("parsing: %s", raw.c_str()); } while
(0);

4792

XMLDocument doc;

4793

4794

if (!doc.ParseMemory(raw.c_str(), raw.size(), "noname.xml"))

4795

return llvm::createStringError(llvm::inconvertibleErrorCode(),

4796

"Error reading noname.xml");

4797

4798

XMLNode root_element = doc.GetRootElement("library-list");

4799

if (!root_element)

4800

return llvm::createStringError(llvm::inconvertibleErrorCode(),

4801

"Error finding library-list xml element");

4802

4803

root_element.ForEachChildElementWithName(

4804

"library", [log, &list](const XMLNode &library) -> bool {

4805

LoadedModuleInfoList::LoadedModuleInfo module;

4806

4807

llvm::StringRef name = library.GetAttributeValue("name");

4808

module.set_name(name.str());

4809

4810

// The base address of a given library will be the address of its

4811

// first section. Most remotes send only one section for Windows

4812

// targets for example.

4813

const XMLNode &section =

4814

library.FindFirstChildElementWithName("section");

4815

llvm::StringRef address = section.GetAttributeValue("address");

4816

module.set_base(

4817

StringConvert::ToUInt64(address.data(), LLDB_INVALID_ADDRESS0xffffffffffffffffULL, 0));

4818

// These addresses are absolute values.

4819

module.set_base_is_offset(false);

4820

4821

if (log) {

4822

std::string name;

4823

lldb::addr_t base = 0;

4824

bool base_is_offset;

4825

module.get_name(name);

4826

module.get_base(base);

4827

module.get_base_is_offset(base_is_offset);

4828

4829

LLDB_LOGF(log, "found (base:0x%08" PRIx64 "[%s], name:'%s')", base,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found (base:0x%08" "llx" "[%s], name:'%s')"
, base, (base_is_offset ? "offset" : "absolute"), name.c_str(
)); } while (0)

4830

(base_is_offset ? "offset" : "absolute"), name.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found (base:0x%08" "llx" "[%s], name:'%s')"
, base, (base_is_offset ? "offset" : "absolute"), name.c_str(
)); } while (0);

4831

}

4832

4833

list.add(module);

4834

return true; // Keep iterating over all "library" elements in the root

4835

// node

4836

});

4837

4838

if (log)

4839

LLDB_LOGF(log, "found %" PRId32 " modules in total",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found %" "d" " modules in total", (
int)list.m_list.size()); } while (0)

4840

(int)list.m_list.size())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("found %" "d" " modules in total", (
int)list.m_list.size()); } while (0);

4841

return list;

4842

} else {

4843

return llvm::createStringError(llvm::inconvertibleErrorCode(),

4844

"Remote libraries not supported");

4845

}

4846

}

4847

4848

lldb::ModuleSP ProcessGDBRemote::LoadModuleAtAddress(const FileSpec &file,

4849

lldb::addr_t link_map,

4850

lldb::addr_t base_addr,

4851

bool value_is_offset) {

4852

DynamicLoader *loader = GetDynamicLoader();

4853

if (!loader)

4854

return nullptr;

4855

4856

return loader->LoadModuleAtAddress(file, link_map, base_addr,

4857

value_is_offset);

4858

}

4859

4860

llvm::Error ProcessGDBRemote::LoadModules() {

4861

using lldb_private::process_gdb_remote::ProcessGDBRemote;

4862

4863

// request a list of loaded libraries from GDBServer

4864

llvm::Expected<LoadedModuleInfoList> module_list = GetLoadedModuleList();

4865

if (!module_list)

4866

return module_list.takeError();

4867

4868

// get a list of all the modules

4869

ModuleList new_modules;

4870

4871

for (LoadedModuleInfoList::LoadedModuleInfo &modInfo : module_list->m_list) {

4872

std::string mod_name;

4873

lldb::addr_t mod_base;

4874

lldb::addr_t link_map;

4875

bool mod_base_is_offset;

4876

4877

bool valid = true;

4878

valid &= modInfo.get_name(mod_name);

4879

valid &= modInfo.get_base(mod_base);

4880

valid &= modInfo.get_base_is_offset(mod_base_is_offset);

4881

if (!valid)

4882

continue;

4883

4884

if (!modInfo.get_link_map(link_map))

4885

link_map = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

4886

4887

FileSpec file(mod_name);

4888

FileSystem::Instance().Resolve(file);

4889

lldb::ModuleSP module_sp =

4890

LoadModuleAtAddress(file, link_map, mod_base, mod_base_is_offset);

4891

4892

if (module_sp.get())

4893

new_modules.Append(module_sp);

4894

}

4895

4896

if (new_modules.GetSize() > 0) {

4897

ModuleList removed_modules;

4898

Target &target = GetTarget();

4899

ModuleList &loaded_modules = m_process->GetTarget().GetImages();

4900

4901

for (size_t i = 0; i < loaded_modules.GetSize(); ++i) {

4902

const lldb::ModuleSP loaded_module = loaded_modules.GetModuleAtIndex(i);

4903

4904

bool found = false;

4905

for (size_t j = 0; j < new_modules.GetSize(); ++j) {

4906

if (new_modules.GetModuleAtIndex(j).get() == loaded_module.get())

4907

found = true;

4908

}

4909

4910

// The main executable will never be included in libraries-svr4, don't

4911

// remove it

4912

if (!found &&

4913

loaded_module.get() != target.GetExecutableModulePointer()) {

4914

removed_modules.Append(loaded_module);

4915

}

4916

}

4917

4918

loaded_modules.Remove(removed_modules);

4919

m_process->GetTarget().ModulesDidUnload(removed_modules, false);

4920

4921

new_modules.ForEach([&target](const lldb::ModuleSP module_sp) -> bool {

4922

lldb_private::ObjectFile *obj = module_sp->GetObjectFile();

4923

if (!obj)

4924

return true;

4925

4926

if (obj->GetType() != ObjectFile::Type::eTypeExecutable)

4927

return true;

4928

4929

lldb::ModuleSP module_copy_sp = module_sp;

4930

target.SetExecutableModule(module_copy_sp, eLoadDependentsNo);

4931

return false;

4932

});

4933

4934

loaded_modules.AppendIfNeeded(new_modules);

4935

m_process->GetTarget().ModulesDidLoad(new_modules);

4936

}

4937

4938

return llvm::ErrorSuccess();

4939

}

4940

4941

Status ProcessGDBRemote::GetFileLoadAddress(const FileSpec &file,

4942

bool &is_loaded,

4943

lldb::addr_t &load_addr) {

4944

is_loaded = false;

4945

load_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

4946

4947

std::string file_path = file.GetPath(false);

4948

if (file_path.empty())

4949

return Status("Empty file name specified");

4950

4951

StreamString packet;

4952

packet.PutCString("qFileLoadAddress:");

4953

packet.PutStringAsRawHex8(file_path);

4954

4955

StringExtractorGDBRemote response;

4956

if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response) !=

4957

GDBRemoteCommunication::PacketResult::Success)

4958

return Status("Sending qFileLoadAddress packet failed");

4959

4960

if (response.IsErrorResponse()) {

4961

if (response.GetError() == 1) {

4962

// The file is not loaded into the inferior

4963

is_loaded = false;

4964

load_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;

4965

return Status();

4966

}

4967

4968

return Status(

4969

"Fetching file load address from remote server returned an error");

4970

}

4971

4972

if (response.IsNormalResponse()) {

4973

is_loaded = true;

4974

load_addr = response.GetHexMaxU64(false, LLDB_INVALID_ADDRESS0xffffffffffffffffULL);

4975

return Status();

4976

}

4977

4978

return Status(

4979

"Unknown error happened during sending the load address packet");

4980

}

4981

4982

void ProcessGDBRemote::ModulesDidLoad(ModuleList &module_list) {

4983

// We must call the lldb_private::Process::ModulesDidLoad () first before we

4984

// do anything

4985

Process::ModulesDidLoad(module_list);

4986

4987

// After loading shared libraries, we can ask our remote GDB server if it

4988

// needs any symbols.

4989

m_gdb_comm.ServeSymbolLookups(this);

4990

}

4991

4992

void ProcessGDBRemote::HandleAsyncStdout(llvm::StringRef out) {

4993

AppendSTDOUT(out.data(), out.size());

4994

}

4995

4996

static const char *end_delimiter = "--end--;";

4997

static const int end_delimiter_len = 8;

4998

4999

void ProcessGDBRemote::HandleAsyncMisc(llvm::StringRef data) {

5000

std::string input = data.str(); // '1' to move beyond 'A'

5001

if (m_partial_profile_data.length() > 0) {

5002

m_partial_profile_data.append(input);

5003

input = m_partial_profile_data;

5004

m_partial_profile_data.clear();

5005

}

5006

5007

size_t found, pos = 0, len = input.length();

5008

while ((found = input.find(end_delimiter, pos)) != std::string::npos) {

5009

StringExtractorGDBRemote profileDataExtractor(

5010

input.substr(pos, found).c_str());

5011

std::string profile_data =

5012

HarmonizeThreadIdsForProfileData(profileDataExtractor);

5013

BroadcastAsyncProfileData(profile_data);

5014

5015

pos = found + end_delimiter_len;

5016

}

5017

5018

if (pos < len) {

5019

// Last incomplete chunk.

5020

m_partial_profile_data = input.substr(pos);

5021

}

5022

}

5023

5024

std::string ProcessGDBRemote::HarmonizeThreadIdsForProfileData(

5025

StringExtractorGDBRemote &profileDataExtractor) {

5026

std::map<uint64_t, uint32_t> new_thread_id_to_used_usec_map;

5027

std::string output;

5028

llvm::raw_string_ostream output_stream(output);

5029

llvm::StringRef name, value;

5030

5031

// Going to assuming thread_used_usec comes first, else bail out.

5032

while (profileDataExtractor.GetNameColonValue(name, value)) {

5033

if (name.compare("thread_used_id") == 0) {

5034

StringExtractor threadIDHexExtractor(value);

5035

uint64_t thread_id = threadIDHexExtractor.GetHexMaxU64(false, 0);

5036

5037

bool has_used_usec = false;

5038

uint32_t curr_used_usec = 0;

5039

llvm::StringRef usec_name, usec_value;

5040

uint32_t input_file_pos = profileDataExtractor.GetFilePos();

5041

if (profileDataExtractor.GetNameColonValue(usec_name, usec_value)) {

5042

if (usec_name.equals("thread_used_usec")) {

5043

has_used_usec = true;

5044

usec_value.getAsInteger(0, curr_used_usec);

5045

} else {

5046

// We didn't find what we want, it is probably an older version. Bail

5047

// out.

5048

profileDataExtractor.SetFilePos(input_file_pos);

5049

}

5050

}

5051

5052

if (has_used_usec) {

5053

uint32_t prev_used_usec = 0;

5054

std::map<uint64_t, uint32_t>::iterator iterator =

5055

m_thread_id_to_used_usec_map.find(thread_id);

5056

if (iterator != m_thread_id_to_used_usec_map.end()) {

5057

prev_used_usec = m_thread_id_to_used_usec_map[thread_id];

5058

}

5059

5060

uint32_t real_used_usec = curr_used_usec - prev_used_usec;

5061

// A good first time record is one that runs for at least 0.25 sec

5062

bool good_first_time =

5063

(prev_used_usec == 0) && (real_used_usec > 250000);

5064

bool good_subsequent_time =

5065

(prev_used_usec > 0) &&

5066

((real_used_usec > 0) || (HasAssignedIndexIDToThread(thread_id)));

5067

5068

if (good_first_time || good_subsequent_time) {

5069

// We try to avoid doing too many index id reservation, resulting in

5070

// fast increase of index ids.

5071

5072

output_stream << name << ":";

5073

int32_t index_id = AssignIndexIDToThread(thread_id);

5074

output_stream << index_id << ";";

5075

5076

output_stream << usec_name << ":" << usec_value << ";";

5077

} else {

5078

// Skip past 'thread_used_name'.

5079

llvm::StringRef local_name, local_value;

5080

profileDataExtractor.GetNameColonValue(local_name, local_value);

5081

}

5082

5083

// Store current time as previous time so that they can be compared

5084

// later.

5085

new_thread_id_to_used_usec_map[thread_id] = curr_used_usec;

5086

} else {

5087

// Bail out and use old string.

5088

output_stream << name << ":" << value << ";";

5089

}

5090

} else {

5091

output_stream << name << ":" << value << ";";

5092

}

5093

}

5094

output_stream << end_delimiter;

5095

m_thread_id_to_used_usec_map = new_thread_id_to_used_usec_map;

5096

5097

return output_stream.str();

5098

}

5099

5100

void ProcessGDBRemote::HandleStopReply() {

5101

if (GetStopID() != 0)

5102

return;

5103

5104

if (GetID() == LLDB_INVALID_PROCESS_ID0) {

5105

lldb::pid_t pid = m_gdb_comm.GetCurrentProcessID();

5106

if (pid != LLDB_INVALID_PROCESS_ID0)

5107

SetID(pid);

5108

}

5109

BuildDynamicRegisterInfo(true);

5110

}

5111

5112

static const char *const s_async_json_packet_prefix = "JSON-async:";

5113

5114

static StructuredData::ObjectSP

5115

ParseStructuredDataPacket(llvm::StringRef packet) {

5116

Log *log(ProcessGDBRemoteLog::GetLogIfAllCategoriesSet(GDBR_LOG_PROCESS(1u << 1)));

5117

5118

if (!packet.consume_front(s_async_json_packet_prefix)) {

5119

if (log) {

5120

LLDB_LOGF(do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationClientBase::%s() received $J packet "
"but was not a StructuredData packet: packet starts with " "%s"
, __FUNCTION__, packet.slice(0, strlen(s_async_json_packet_prefix
)).str().c_str()); } while (0)

5121

log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationClientBase::%s() received $J packet "
"but was not a StructuredData packet: packet starts with " "%s"
, __FUNCTION__, packet.slice(0, strlen(s_async_json_packet_prefix
)).str().c_str()); } while (0)

5122

"GDBRemoteCommunicationClientBase::%s() received $J packet "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationClientBase::%s() received $J packet "
"but was not a StructuredData packet: packet starts with " "%s"
, __FUNCTION__, packet.slice(0, strlen(s_async_json_packet_prefix
)).str().c_str()); } while (0)

5123

"but was not a StructuredData packet: packet starts with "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationClientBase::%s() received $J packet "
"but was not a StructuredData packet: packet starts with " "%s"
, __FUNCTION__, packet.slice(0, strlen(s_async_json_packet_prefix
)).str().c_str()); } while (0)

5124

"%s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationClientBase::%s() received $J packet "
"but was not a StructuredData packet: packet starts with " "%s"
, __FUNCTION__, packet.slice(0, strlen(s_async_json_packet_prefix
)).str().c_str()); } while (0)

5125

__FUNCTION__,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationClientBase::%s() received $J packet "
"but was not a StructuredData packet: packet starts with " "%s"
, __FUNCTION__, packet.slice(0, strlen(s_async_json_packet_prefix
)).str().c_str()); } while (0)

5126

packet.slice(0, strlen(s_async_json_packet_prefix)).str().c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("GDBRemoteCommunicationClientBase::%s() received $J packet "
"but was not a StructuredData packet: packet starts with " "%s"
, __FUNCTION__, packet.slice(0, strlen(s_async_json_packet_prefix
)).str().c_str()); } while (0);

5127

}

5128

return StructuredData::ObjectSP();

5129

}

5130

5131

// This is an asynchronous JSON packet, destined for a StructuredDataPlugin.

5132

StructuredData::ObjectSP json_sp =

5133

StructuredData::ParseJSON(std::string(packet));

5134

if (log) {

5135

if (json_sp) {

5136

StreamString json_str;

5137

json_sp->Dump(json_str, true);

5138

json_str.Flush();

5139

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s() " "received Async StructuredData packet: %s"
, __FUNCTION__, json_str.GetData()); } while (0)

5140

"ProcessGDBRemote::%s() "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s() " "received Async StructuredData packet: %s"
, __FUNCTION__, json_str.GetData()); } while (0)

5141

"received Async StructuredData packet: %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s() " "received Async StructuredData packet: %s"
, __FUNCTION__, json_str.GetData()); } while (0)

5142

__FUNCTION__, json_str.GetData())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s() " "received Async StructuredData packet: %s"
, __FUNCTION__, json_str.GetData()); } while (0);

5143

} else {

5144

LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s" "() received StructuredData packet:"
" parse failure", __FUNCTION__); } while (0)

5145

"ProcessGDBRemote::%s"do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s" "() received StructuredData packet:"
" parse failure", __FUNCTION__); } while (0)

5146

"() received StructuredData packet:"do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s" "() received StructuredData packet:"
" parse failure", __FUNCTION__); } while (0)

5147

" parse failure",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s" "() received StructuredData packet:"
" parse failure", __FUNCTION__); } while (0)

5148

__FUNCTION__)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("ProcessGDBRemote::%s" "() received StructuredData packet:"
" parse failure", __FUNCTION__); } while (0);

5149

}

5150

}

5151

return json_sp;

5152

}

5153

5154

void ProcessGDBRemote::HandleAsyncStructuredDataPacket(llvm::StringRef data) {

5155

auto structured_data_sp = ParseStructuredDataPacket(data);

5156

if (structured_data_sp)

5157

RouteAsyncStructuredData(structured_data_sp);

5158

}

5159

5160

class CommandObjectProcessGDBRemoteSpeedTest : public CommandObjectParsed {

5161

public:

5162

CommandObjectProcessGDBRemoteSpeedTest(CommandInterpreter &interpreter)

5163

: CommandObjectParsed(interpreter, "process plugin packet speed-test",

5164

"Tests packet speeds of various sizes to determine "

5165

"the performance characteristics of the GDB remote "

5166

"connection. ",

5167

nullptr),

5168

m_option_group(),

5169

m_num_packets(LLDB_OPT_SET_1(1U << 0), false, "count", 'c', 0, eArgTypeCount,

5170

"The number of packets to send of each varying size "

5171

"(default is 1000).",

5172

1000),

5173

m_max_send(LLDB_OPT_SET_1(1U << 0), false, "max-send", 's', 0, eArgTypeCount,

5174

"The maximum number of bytes to send in a packet. Sizes "

5175

"increase in powers of 2 while the size is less than or "

5176

"equal to this option value. (default 1024).",

5177

1024),

5178

m_max_recv(LLDB_OPT_SET_1(1U << 0), false, "max-receive", 'r', 0, eArgTypeCount,

5179

"The maximum number of bytes to receive in a packet. Sizes "

5180

"increase in powers of 2 while the size is less than or "

5181

"equal to this option value. (default 1024).",

5182

1024),

5183

m_json(LLDB_OPT_SET_1(1U << 0), false, "json", 'j',

5184

"Print the output as JSON data for easy parsing.", false, true) {

5185

m_option_group.Append(&m_num_packets, LLDB_OPT_SET_ALL0xFFFFFFFFU, LLDB_OPT_SET_1(1U << 0));

5186

m_option_group.Append(&m_max_send, LLDB_OPT_SET_ALL0xFFFFFFFFU, LLDB_OPT_SET_1(1U << 0));

5187

m_option_group.Append(&m_max_recv, LLDB_OPT_SET_ALL0xFFFFFFFFU, LLDB_OPT_SET_1(1U << 0));

5188

m_option_group.Append(&m_json, LLDB_OPT_SET_ALL0xFFFFFFFFU, LLDB_OPT_SET_1(1U << 0));

5189

m_option_group.Finalize();

5190

}

5191

5192

~CommandObjectProcessGDBRemoteSpeedTest() override = default;

5193

5194

Options *GetOptions() override { return &m_option_group; }

5195

5196

bool DoExecute(Args &command, CommandReturnObject &result) override {

5197

const size_t argc = command.GetArgumentCount();

5198

if (argc == 0) {

5199

ProcessGDBRemote *process =

5200

(ProcessGDBRemote *)m_interpreter.GetExecutionContext()

5201

.GetProcessPtr();

5202

if (process) {

5203

StreamSP output_stream_sp(

5204

m_interpreter.GetDebugger().GetAsyncOutputStream());

5205

result.SetImmediateOutputStream(output_stream_sp);

5206

5207

const uint32_t num_packets =

5208

(uint32_t)m_num_packets.GetOptionValue().GetCurrentValue();

5209

const uint64_t max_send = m_max_send.GetOptionValue().GetCurrentValue();

5210

const uint64_t max_recv = m_max_recv.GetOptionValue().GetCurrentValue();

5211

const bool json = m_json.GetOptionValue().GetCurrentValue();

5212

const uint64_t k_recv_amount =

5213

4 * 1024 * 1024; // Receive amount in bytes

5214

process->GetGDBRemote().TestPacketSpeed(

5215

num_packets, max_send, max_recv, k_recv_amount, json,

5216

output_stream_sp ? *output_stream_sp : result.GetOutputStream());

5217

result.SetStatus(eReturnStatusSuccessFinishResult);

5218

return true;

5219

}

5220

} else {

5221

result.AppendErrorWithFormat("'%s' takes no arguments",

5222

m_cmd_name.c_str());

5223

}

5224

result.SetStatus(eReturnStatusFailed);

5225

return false;

5226

}

5227

5228

protected:

5229

OptionGroupOptions m_option_group;

5230

OptionGroupUInt64 m_num_packets;

5231

OptionGroupUInt64 m_max_send;

5232

OptionGroupUInt64 m_max_recv;

5233

OptionGroupBoolean m_json;

5234

};

5235

5236

class CommandObjectProcessGDBRemotePacketHistory : public CommandObjectParsed {

5237

private:

5238

public:

5239

CommandObjectProcessGDBRemotePacketHistory(CommandInterpreter &interpreter)

5240

: CommandObjectParsed(interpreter, "process plugin packet history",

5241

"Dumps the packet history buffer. ", nullptr) {}

5242

5243

~CommandObjectProcessGDBRemotePacketHistory() override = default;

5244

5245

bool DoExecute(Args &command, CommandReturnObject &result) override {

5246

const size_t argc = command.GetArgumentCount();

5247

if (argc == 0) {

5248

ProcessGDBRemote *process =

5249

(ProcessGDBRemote *)m_interpreter.GetExecutionContext()

5250

.GetProcessPtr();

5251

if (process) {

5252

process->GetGDBRemote().DumpHistory(result.GetOutputStream());

5253

result.SetStatus(eReturnStatusSuccessFinishResult);

5254

return true;

5255

}

5256

} else {

5257

result.AppendErrorWithFormat("'%s' takes no arguments",

5258

m_cmd_name.c_str());

5259

}

5260

result.SetStatus(eReturnStatusFailed);

5261

return false;

5262

}

5263

};

5264

5265

class CommandObjectProcessGDBRemotePacketXferSize : public CommandObjectParsed {

5266

private:

5267

public:

5268

CommandObjectProcessGDBRemotePacketXferSize(CommandInterpreter &interpreter)

5269

: CommandObjectParsed(

5270

interpreter, "process plugin packet xfer-size",

5271

"Maximum size that lldb will try to read/write one one chunk.",

5272

nullptr) {}

5273

5274

~CommandObjectProcessGDBRemotePacketXferSize() override = default;

5275

5276

bool DoExecute(Args &command, CommandReturnObject &result) override {

5277

const size_t argc = command.GetArgumentCount();

5278

if (argc == 0) {

5279

result.AppendErrorWithFormat("'%s' takes an argument to specify the max "

5280

"amount to be transferred when "

5281

"reading/writing",

5282

m_cmd_name.c_str());

5283

return false;

5284

}

5285

5286

ProcessGDBRemote *process =

5287

(ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr();

5288

if (process) {

5289

const char *packet_size = command.GetArgumentAtIndex(0);

5290

errno(*__errno()) = 0;

5291

uint64_t user_specified_max = strtoul(packet_size, nullptr, 10);

5292

if (errno(*__errno()) == 0 && user_specified_max != 0) {

5293

process->SetUserSpecifiedMaxMemoryTransferSize(user_specified_max);

5294

result.SetStatus(eReturnStatusSuccessFinishResult);

5295

return true;

5296

}

5297

}

5298

result.SetStatus(eReturnStatusFailed);

5299

return false;

5300

}

5301

};

5302

5303

class CommandObjectProcessGDBRemotePacketSend : public CommandObjectParsed {

5304

private:

5305

public:

5306

CommandObjectProcessGDBRemotePacketSend(CommandInterpreter &interpreter)

5307

: CommandObjectParsed(interpreter, "process plugin packet send",

5308

"Send a custom packet through the GDB remote "

5309

"protocol and print the answer. "

5310

"The packet header and footer will automatically "

5311

"be added to the packet prior to sending and "

5312

"stripped from the result.",

5313

nullptr) {}

5314

5315

~CommandObjectProcessGDBRemotePacketSend() override = default;

5316

5317

bool DoExecute(Args &command, CommandReturnObject &result) override {

5318

const size_t argc = command.GetArgumentCount();

5319

if (argc == 0) {

5320

result.AppendErrorWithFormat(

5321

"'%s' takes a one or more packet content arguments",

5322

m_cmd_name.c_str());

5323

return false;

5324

}

5325

5326

ProcessGDBRemote *process =

5327

(ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr();

5328

if (process) {

5329

for (size_t i = 0; i < argc; ++i) {

5330

const char *packet_cstr = command.GetArgumentAtIndex(0);

5331

StringExtractorGDBRemote response;

5332

process->GetGDBRemote().SendPacketAndWaitForResponse(

5333

packet_cstr, response, process->GetInterruptTimeout());

5334

result.SetStatus(eReturnStatusSuccessFinishResult);

5335

Stream &output_strm = result.GetOutputStream();

5336

output_strm.Printf(" packet: %s\n", packet_cstr);

5337

std::string response_str = std::string(response.GetStringRef());

5338

5339

if (strstr(packet_cstr, "qGetProfileData") != nullptr) {

5340

response_str = process->HarmonizeThreadIdsForProfileData(response);

5341

}

5342

5343

if (response_str.empty())

5344

output_strm.PutCString("response: \nerror: UNIMPLEMENTED\n");

5345

else

5346

output_strm.Printf("response: %s\n", response.GetStringRef().data());

5347

}

5348

}

5349

return true;

5350

}

5351

};

5352

5353

class CommandObjectProcessGDBRemotePacketMonitor : public CommandObjectRaw {

5354

private:

5355

public:

5356

CommandObjectProcessGDBRemotePacketMonitor(CommandInterpreter &interpreter)

5357

: CommandObjectRaw(interpreter, "process plugin packet monitor",

5358

"Send a qRcmd packet through the GDB remote protocol "

5359

"and print the response."

5360

"The argument passed to this command will be hex "

5361

"encoded into a valid 'qRcmd' packet, sent and the "

5362

"response will be printed.") {}

5363

5364

~CommandObjectProcessGDBRemotePacketMonitor() override = default;

5365

5366

bool DoExecute(llvm::StringRef command,

5367

CommandReturnObject &result) override {

5368

if (command.empty()) {

5369

result.AppendErrorWithFormat("'%s' takes a command string argument",

5370

m_cmd_name.c_str());

5371

return false;

5372

}

5373

5374

ProcessGDBRemote *process =

5375

(ProcessGDBRemote *)m_interpreter.GetExecutionContext().GetProcessPtr();

5376

if (process) {

5377

StreamString packet;

5378

packet.PutCString("qRcmd,");

5379

packet.PutBytesAsRawHex8(command.data(), command.size());

5380

5381

StringExtractorGDBRemote response;

5382

Stream &output_strm = result.GetOutputStream();

5383

process->GetGDBRemote().SendPacketAndReceiveResponseWithOutputSupport(

5384

packet.GetString(), response, process->GetInterruptTimeout(),

5385

[&output_strm](llvm::StringRef output) { output_strm << output; });

5386

result.SetStatus(eReturnStatusSuccessFinishResult);

5387

output_strm.Printf(" packet: %s\n", packet.GetData());

5388

const std::string &response_str = std::string(response.GetStringRef());

5389

5390

if (response_str.empty())

5391

output_strm.PutCString("response: \nerror: UNIMPLEMENTED\n");

5392

else

5393

output_strm.Printf("response: %s\n", response.GetStringRef().data());

5394

}

5395

return true;

5396

}

5397

};

5398

5399

class CommandObjectProcessGDBRemotePacket : public CommandObjectMultiword {

5400

private:

5401

public:

5402

CommandObjectProcessGDBRemotePacket(CommandInterpreter &interpreter)

5403

: CommandObjectMultiword(interpreter, "process plugin packet",

5404

"Commands that deal with GDB remote packets.",

5405

nullptr) {

5406

LoadSubCommand(

5407

"history",

5408

CommandObjectSP(

5409

new CommandObjectProcessGDBRemotePacketHistory(interpreter)));

5410

LoadSubCommand(

5411

"send", CommandObjectSP(

5412

new CommandObjectProcessGDBRemotePacketSend(interpreter)));

5413

LoadSubCommand(

5414

"monitor",

5415

CommandObjectSP(

5416

new CommandObjectProcessGDBRemotePacketMonitor(interpreter)));

5417

LoadSubCommand(

5418

"xfer-size",

5419

CommandObjectSP(

5420

new CommandObjectProcessGDBRemotePacketXferSize(interpreter)));

5421

LoadSubCommand("speed-test",

5422

CommandObjectSP(new CommandObjectProcessGDBRemoteSpeedTest(

5423

interpreter)));

5424

}

5425

5426

~CommandObjectProcessGDBRemotePacket() override = default;

5427

};

5428

5429

class CommandObjectMultiwordProcessGDBRemote : public CommandObjectMultiword {

5430

public:

5431

CommandObjectMultiwordProcessGDBRemote(CommandInterpreter &interpreter)

5432

: CommandObjectMultiword(

5433

interpreter, "process plugin",

5434

"Commands for operating on a ProcessGDBRemote process.",

5435

"process plugin <subcommand> [<subcommand-options>]") {

5436

LoadSubCommand(

5437

"packet",

5438

CommandObjectSP(new CommandObjectProcessGDBRemotePacket(interpreter)));

5439

}

5440

5441

~CommandObjectMultiwordProcessGDBRemote() override = default;

5442

};

5443

5444

CommandObject *ProcessGDBRemote::GetPluginCommandObject() {

5445

if (!m_command_sp)

5446

m_command_sp = std::make_shared<CommandObjectMultiwordProcessGDBRemote>(

5447

GetTarget().GetDebugger().GetCommandInterpreter());

5448

return m_command_sp.get();

5449

}

Bug Summary

Annotated Source Code

File:	src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
Warning:	line 3440, column 7 Value stored to 'error_string' is never read