Bug Summary

File:src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/minidump/MinidumpParser.cpp
Warning:line 75, column 31
Forming reference to null pointer

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name MinidumpParser.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model static -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/llvm/include -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../include -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/obj -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/obj/../include -D NDEBUG -D __STDC_LIMIT_MACROS -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D LLVM_PREFIX="/usr" -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/include -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/clang/include -I /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/obj/../include/lldb/Plugins -internal-isystem /usr/include/c++/v1 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/obj -ferror-limit 19 -fvisibility-inlines-hidden -fwrapv -stack-protector 2 -fno-rtti -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c++ /usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/minidump/MinidumpParser.cpp

/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/minidump/MinidumpParser.cpp

→
1//===-- MinidumpParser.cpp ------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "MinidumpParser.h"
10#include "NtStructures.h"
11#include "RegisterContextMinidump_x86_32.h"
12
13#include "Plugins/Process/Utility/LinuxProcMaps.h"
14#include "lldb/Utility/LLDBAssert.h"
15#include "lldb/Utility/Log.h"
16
17// C includes
18// C++ includes
19#include <algorithm>
20#include <map>
21#include <vector>
22#include <utility>
23
24using namespace lldb_private;
25using namespace minidump;
26
27llvm::Expected<MinidumpParser>
28MinidumpParser::Create(const lldb::DataBufferSP &data_sp) {
29 auto ExpectedFile = llvm::object::MinidumpFile::create(
30 llvm::MemoryBufferRef(toStringRef(data_sp->GetData()), "minidump"));
31 if (!ExpectedFile)
32 return ExpectedFile.takeError();
33
34 return MinidumpParser(data_sp, std::move(*ExpectedFile));
35}
36
37MinidumpParser::MinidumpParser(lldb::DataBufferSP data_sp,
38 std::unique_ptr<llvm::object::MinidumpFile> file)
39 : m_data_sp(std::move(data_sp)), m_file(std::move(file)) {}
40
41llvm::ArrayRef<uint8_t> MinidumpParser::GetData() {
42 return llvm::ArrayRef<uint8_t>(m_data_sp->GetBytes(),
43 m_data_sp->GetByteSize());
44}
45
46llvm::ArrayRef<uint8_t> MinidumpParser::GetStream(StreamType stream_type) {
47 return m_file->getRawStream(stream_type)
48 .getValueOr(llvm::ArrayRef<uint8_t>());
49}
50
51UUID MinidumpParser::GetModuleUUID(const minidump::Module *module) {
52 auto cv_record =
53 GetData().slice(module->CvRecord.RVA, module->CvRecord.DataSize);
54
55 // Read the CV record signature
56 const llvm::support::ulittle32_t *signature = nullptr;
57 Status error = consumeObject(cv_record, signature);
58 if (error.Fail())
1
Assuming the condition is false
→
2
←
Taking false branch
→
59 return UUID();
60
61 const CvSignature cv_signature =
62 static_cast<CvSignature>(static_cast<uint32_t>(*signature));
63
64 if (cv_signature == CvSignature::Pdb70) {
3
←
Assuming 'cv_signature' is equal to Pdb70
→
4
←
Taking true branch
→
65 const UUID::CvRecordPdb70 *pdb70_uuid = nullptr;
5
←
'pdb70_uuid' initialized to a null pointer value
→
66 Status error = consumeObject(cv_record, pdb70_uuid);
6
←
Calling 'consumeObject<lldb_private::UUID::CvRecordPdb70>'
→
10
←
Returning from 'consumeObject<lldb_private::UUID::CvRecordPdb70>'
→
67 if (error.Fail())
11
←
Assuming the condition is false
→
12
←
Taking false branch
→
68 return UUID();
69 if (GetArchitecture().GetTriple().isOSBinFormatELF()) {
13
←
Taking false branch
→
70 if (pdb70_uuid->Age != 0)
71 return UUID::fromOptionalData(pdb70_uuid, sizeof(*pdb70_uuid));
72 return UUID::fromOptionalData(&pdb70_uuid->Uuid,
73 sizeof(pdb70_uuid->Uuid));
74 }
75 return UUID::fromCvRecord(*pdb70_uuid);
14
←
Forming reference to null pointer
76 } else if (cv_signature == CvSignature::ElfBuildId)
77 return UUID::fromOptionalData(cv_record);
78
79 return UUID();
80}
81
82llvm::ArrayRef<minidump::Thread> MinidumpParser::GetThreads() {
83 auto ExpectedThreads = GetMinidumpFile().getThreadList();
84 if (ExpectedThreads)
85 return *ExpectedThreads;
86
87 LLDB_LOG_ERROR(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_THREAD),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 2))); ::llvm::Error error_private = (ExpectedThreads
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read thread list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
88 ExpectedThreads.takeError(),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 2))); ::llvm::Error error_private = (ExpectedThreads
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read thread list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
89 "Failed to read thread list: {0}")do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 2))); ::llvm::Error error_private = (ExpectedThreads
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read thread list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);
90 return {};
91}
92
93llvm::ArrayRef<uint8_t>
94MinidumpParser::GetThreadContext(const LocationDescriptor &location) {
95 if (location.RVA + location.DataSize > GetData().size())
96 return {};
97 return GetData().slice(location.RVA, location.DataSize);
98}
99
100llvm::ArrayRef<uint8_t>
101MinidumpParser::GetThreadContext(const minidump::Thread &td) {
102 return GetThreadContext(td.Context);
103}
104
105llvm::ArrayRef<uint8_t>
106MinidumpParser::GetThreadContextWow64(const minidump::Thread &td) {
107 // On Windows, a 32-bit process can run on a 64-bit machine under WOW64. If
108 // the minidump was captured with a 64-bit debugger, then the CONTEXT we just
109 // grabbed from the mini_dump_thread is the one for the 64-bit "native"
110 // process rather than the 32-bit "guest" process we care about. In this
111 // case, we can get the 32-bit CONTEXT from the TEB (Thread Environment
112 // Block) of the 64-bit process.
113 auto teb_mem = GetMemory(td.EnvironmentBlock, sizeof(TEB64));
114 if (teb_mem.empty())
115 return {};
116
117 const TEB64 *wow64teb;
118 Status error = consumeObject(teb_mem, wow64teb);
119 if (error.Fail())
120 return {};
121
122 // Slot 1 of the thread-local storage in the 64-bit TEB points to a structure
123 // that includes the 32-bit CONTEXT (after a ULONG). See:
124 // https://msdn.microsoft.com/en-us/library/ms681670.aspx
125 auto context =
126 GetMemory(wow64teb->tls_slots[1] + 4, sizeof(MinidumpContext_x86_32));
127 if (context.size() < sizeof(MinidumpContext_x86_32))
128 return {};
129
130 return context;
131 // NOTE: We don't currently use the TEB for anything else. If we
132 // need it in the future, the 32-bit TEB is located according to the address
133 // stored in the first slot of the 64-bit TEB (wow64teb.Reserved1[0]).
134}
135
136ArchSpec MinidumpParser::GetArchitecture() {
137 if (m_arch.IsValid())
138 return m_arch;
139
140 // Set the architecture in m_arch
141 llvm::Expected<const SystemInfo &> system_info = m_file->getSystemInfo();
142
143 if (!system_info) {
144 LLDB_LOG_ERROR(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (system_info
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read SystemInfo stream: {0}"); } else ::
llvm::consumeError(::std::move(error_private)); } while (0)
145 system_info.takeError(),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (system_info
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read SystemInfo stream: {0}"); } else ::
llvm::consumeError(::std::move(error_private)); } while (0)
146 "Failed to read SystemInfo stream: {0}")do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (system_info
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read SystemInfo stream: {0}"); } else ::
llvm::consumeError(::std::move(error_private)); } while (0);
147 return m_arch;
148 }
149
150 // TODO what to do about big endiand flavors of arm ?
151 // TODO set the arm subarch stuff if the minidump has info about it
152
153 llvm::Triple triple;
154 triple.setVendor(llvm::Triple::VendorType::UnknownVendor);
155
156 switch (system_info->ProcessorArch) {
157 case ProcessorArchitecture::X86:
158 triple.setArch(llvm::Triple::ArchType::x86);
159 break;
160 case ProcessorArchitecture::AMD64:
161 triple.setArch(llvm::Triple::ArchType::x86_64);
162 break;
163 case ProcessorArchitecture::ARM:
164 triple.setArch(llvm::Triple::ArchType::arm);
165 break;
166 case ProcessorArchitecture::ARM64:
167 case ProcessorArchitecture::BP_ARM64:
168 triple.setArch(llvm::Triple::ArchType::aarch64);
169 break;
170 default:
171 triple.setArch(llvm::Triple::ArchType::UnknownArch);
172 break;
173 }
174
175 // TODO add all of the OSes that Minidump/breakpad distinguishes?
176 switch (system_info->PlatformId) {
177 case OSPlatform::Win32S:
178 case OSPlatform::Win32Windows:
179 case OSPlatform::Win32NT:
180 case OSPlatform::Win32CE:
181 triple.setOS(llvm::Triple::OSType::Win32);
182 triple.setVendor(llvm::Triple::VendorType::PC);
183 break;
184 case OSPlatform::Linux:
185 triple.setOS(llvm::Triple::OSType::Linux);
186 break;
187 case OSPlatform::MacOSX:
188 triple.setOS(llvm::Triple::OSType::MacOSX);
189 triple.setVendor(llvm::Triple::Apple);
190 break;
191 case OSPlatform::IOS:
192 triple.setOS(llvm::Triple::OSType::IOS);
193 triple.setVendor(llvm::Triple::Apple);
194 break;
195 case OSPlatform::Android:
196 triple.setOS(llvm::Triple::OSType::Linux);
197 triple.setEnvironment(llvm::Triple::EnvironmentType::Android);
198 break;
199 default: {
200 triple.setOS(llvm::Triple::OSType::UnknownOS);
201 auto ExpectedCSD = m_file->getString(system_info->CSDVersionRVA);
202 if (!ExpectedCSD) {
203 LLDB_LOG_ERROR(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (ExpectedCSD
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to CSD Version string: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
204 ExpectedCSD.takeError(),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (ExpectedCSD
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to CSD Version string: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
205 "Failed to CSD Version string: {0}")do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (ExpectedCSD
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to CSD Version string: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);
206 } else {
207 if (ExpectedCSD->find("Linux") != std::string::npos)
208 triple.setOS(llvm::Triple::OSType::Linux);
209 }
210 break;
211 }
212 }
213 m_arch.SetTriple(triple);
214 return m_arch;
215}
216
217const MinidumpMiscInfo *MinidumpParser::GetMiscInfo() {
218 llvm::ArrayRef<uint8_t> data = GetStream(StreamType::MiscInfo);
219
220 if (data.size() == 0)
221 return nullptr;
222
223 return MinidumpMiscInfo::Parse(data);
224}
225
226llvm::Optional<LinuxProcStatus> MinidumpParser::GetLinuxProcStatus() {
227 llvm::ArrayRef<uint8_t> data = GetStream(StreamType::LinuxProcStatus);
228
229 if (data.size() == 0)
230 return llvm::None;
231
232 return LinuxProcStatus::Parse(data);
233}
234
235llvm::Optional<lldb::pid_t> MinidumpParser::GetPid() {
236 const MinidumpMiscInfo *misc_info = GetMiscInfo();
237 if (misc_info != nullptr) {
238 return misc_info->GetPid();
239 }
240
241 llvm::Optional<LinuxProcStatus> proc_status = GetLinuxProcStatus();
242 if (proc_status.hasValue()) {
243 return proc_status->GetPid();
244 }
245
246 return llvm::None;
247}
248
249llvm::ArrayRef<minidump::Module> MinidumpParser::GetModuleList() {
250 auto ExpectedModules = GetMinidumpFile().getModuleList();
251 if (ExpectedModules)
252 return *ExpectedModules;
253
254 LLDB_LOG_ERROR(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_MODULES),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 21))); ::llvm::Error error_private = (ExpectedModules
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read module list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
255 ExpectedModules.takeError(),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 21))); ::llvm::Error error_private = (ExpectedModules
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read module list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
256 "Failed to read module list: {0}")do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 21))); ::llvm::Error error_private = (ExpectedModules
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read module list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);
257 return {};
258}
259
260static bool
261CreateRegionsCacheFromLinuxMaps(MinidumpParser &parser,
262 std::vector<MemoryRegionInfo> &regions) {
263 auto data = parser.GetStream(StreamType::LinuxMaps);
264 if (data.empty())
265 return false;
266
267 Log *log = lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS(1u << 8));
268 ParseLinuxMapRegions(
269 llvm::toStringRef(data),
270 [&regions, &log](llvm::Expected<MemoryRegionInfo> region) -> bool {
271 if (region)
272 regions.push_back(*region);
273 else
274 LLDB_LOG_ERROR(log, region.takeError(),do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (region.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/minidump/MinidumpParser.cpp"
, __func__, "Reading memory region from minidump failed: {0}"
); } else ::llvm::consumeError(::std::move(error_private)); }
while (0)
275 "Reading memory region from minidump failed: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (region.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/minidump/MinidumpParser.cpp"
, __func__, "Reading memory region from minidump failed: {0}"
); } else ::llvm::consumeError(::std::move(error_private)); }
while (0);
276 return true;
277 });
278 return !regions.empty();
279}
280
281/// Check for the memory regions starting at \a load_addr for a contiguous
282/// section that has execute permissions that matches the module path.
283///
284/// When we load a breakpad generated minidump file, we might have the
285/// /proc/<pid>/maps text for a process that details the memory map of the
286/// process that the minidump is describing. This checks the sorted memory
287/// regions for a section that has execute permissions. A sample maps files
288/// might look like:
289///
290/// 00400000-00401000 r--p 00000000 fd:01 2838574 /tmp/a.out
291/// 00401000-00402000 r-xp 00001000 fd:01 2838574 /tmp/a.out
292/// 00402000-00403000 r--p 00002000 fd:01 2838574 /tmp/a.out
293/// 00403000-00404000 r--p 00002000 fd:01 2838574 /tmp/a.out
294/// 00404000-00405000 rw-p 00003000 fd:01 2838574 /tmp/a.out
295/// ...
296///
297/// This function should return true when given 0x00400000 and "/tmp/a.out"
298/// is passed in as the path since it has a consecutive memory region for
299/// "/tmp/a.out" that has execute permissions at 0x00401000. This will help us
300/// differentiate if a file has been memory mapped into a process for reading
301/// and breakpad ends up saving a minidump file that has two module entries for
302/// a given file: one that is read only for the entire file, and then one that
303/// is the real executable that is loaded into memory for execution. For memory
304/// mapped files they will typically show up and r--p permissions and a range
305/// matcning the entire range of the file on disk:
306///
307/// 00800000-00805000 r--p 00000000 fd:01 2838574 /tmp/a.out
308/// 00805000-00806000 r-xp 00001000 fd:01 1234567 /usr/lib/libc.so
309///
310/// This function should return false when asked about 0x00800000 with
311/// "/tmp/a.out" as the path.
312///
313/// \param[in] path
314/// The path to the module to check for in the memory regions. Only sequential
315/// memory regions whose paths match this path will be considered when looking
316/// for execute permissions.
317///
318/// \param[in] regions
319/// A sorted list of memory regions obtained from a call to
320/// CreateRegionsCacheFromLinuxMaps.
321///
322/// \param[in] base_of_image
323/// The load address of this module from BaseOfImage in the modules list.
324///
325/// \return
326/// True if a contiguous region of memory belonging to the module with a
327/// matching path exists that has executable permissions. Returns false if
328/// \a regions is empty or if there are no regions with execute permissions
329/// that match \a path.
330
331static bool CheckForLinuxExecutable(ConstString path,
332 const MemoryRegionInfos &regions,
333 lldb::addr_t base_of_image) {
334 if (regions.empty())
335 return false;
336 lldb::addr_t addr = base_of_image;
337 MemoryRegionInfo region = MinidumpParser::GetMemoryRegionInfo(regions, addr);
338 while (region.GetName() == path) {
339 if (region.GetExecutable() == MemoryRegionInfo::eYes)
340 return true;
341 addr += region.GetRange().GetByteSize();
342 region = MinidumpParser::GetMemoryRegionInfo(regions, addr);
343 }
344 return false;
345}
346
347std::vector<const minidump::Module *> MinidumpParser::GetFilteredModuleList() {
348 Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21));
349 auto ExpectedModules = GetMinidumpFile().getModuleList();
350 if (!ExpectedModules) {
351 LLDB_LOG_ERROR(log, ExpectedModules.takeError(),do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedModules.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read module list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
352 "Failed to read module list: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedModules.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read module list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);
353 return {};
354 }
355
356 // Create memory regions from the linux maps only. We do this to avoid issues
357 // with breakpad generated minidumps where if someone has mmap'ed a shared
358 // library into memory to accesss its data in the object file, we can get a
359 // minidump with two mappings for a binary: one whose base image points to a
360 // memory region that is read + execute and one that is read only.
361 MemoryRegionInfos linux_regions;
362 if (CreateRegionsCacheFromLinuxMaps(*this, linux_regions))
363 llvm::sort(linux_regions);
364
365 // map module_name -> filtered_modules index
366 typedef llvm::StringMap<size_t> MapType;
367 MapType module_name_to_filtered_index;
368
369 std::vector<const minidump::Module *> filtered_modules;
370
371 for (const auto &module : *ExpectedModules) {
372 auto ExpectedName = m_file->getString(module.ModuleNameRVA);
373 if (!ExpectedName) {
374 LLDB_LOG_ERROR(log, ExpectedName.takeError(),do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedName.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to get module name: {0}"); } else ::llvm::
consumeError(::std::move(error_private)); } while (0)
375 "Failed to get module name: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedName.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to get module name: {0}"); } else ::llvm::
consumeError(::std::move(error_private)); } while (0);
376 continue;
377 }
378
379 MapType::iterator iter;
380 bool inserted;
381 // See if we have inserted this module aready into filtered_modules. If we
382 // haven't insert an entry into module_name_to_filtered_index with the
383 // index where we will insert it if it isn't in the vector already.
384 std::tie(iter, inserted) = module_name_to_filtered_index.try_emplace(
385 *ExpectedName, filtered_modules.size());
386
387 if (inserted) {
388 // This module has not been seen yet, insert it into filtered_modules at
389 // the index that was inserted into module_name_to_filtered_index using
390 // "filtered_modules.size()" above.
391 filtered_modules.push_back(&module);
392 } else {
393 // We have a duplicate module entry. Check the linux regions to see if
394 // either module is not really a mapped executable. If one but not the
395 // other is a real mapped executable, prefer the executable one. This
396 // can happen when a process mmap's in the file for an executable in
397 // order to read bytes from the executable file. A memory region mapping
398 // will exist for the mmap'ed version and for the loaded executable, but
399 // only one will have a consecutive region that is executable in the
400 // memory regions.
401 auto dup_module = filtered_modules[iter->second];
402 ConstString name(*ExpectedName);
403 bool is_executable =
404 CheckForLinuxExecutable(name, linux_regions, module.BaseOfImage);
405 bool dup_is_executable =
406 CheckForLinuxExecutable(name, linux_regions, dup_module->BaseOfImage);
407
408 if (is_executable != dup_is_executable) {
409 if (is_executable)
410 filtered_modules[iter->second] = &module;
411 continue;
412 }
413 // This module has been seen. Modules are sometimes mentioned multiple
414 // times when they are mapped discontiguously, so find the module with
415 // the lowest "base_of_image" and use that as the filtered module.
416 if (module.BaseOfImage < dup_module->BaseOfImage)
417 filtered_modules[iter->second] = &module;
418 }
419 }
420 return filtered_modules;
421}
422
423const minidump::ExceptionStream *MinidumpParser::GetExceptionStream() {
424 auto ExpectedStream = GetMinidumpFile().getExceptionStream();
425 if (ExpectedStream)
426 return &*ExpectedStream;
427
428 LLDB_LOG_ERROR(GetLogIfAnyCategoriesSet(LIBLLDB_LOG_PROCESS),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (ExpectedStream
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read minidump exception stream: {0}");
} else ::llvm::consumeError(::std::move(error_private)); } while
(0)
429 ExpectedStream.takeError(),do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (ExpectedStream
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read minidump exception stream: {0}");
} else ::llvm::consumeError(::std::move(error_private)); } while
(0)
430 "Failed to read minidump exception stream: {0}")do { ::lldb_private::Log *log_private = (GetLogIfAnyCategoriesSet
((1u << 1))); ::llvm::Error error_private = (ExpectedStream
.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read minidump exception stream: {0}");
} else ::llvm::consumeError(::std::move(error_private)); } while
(0);
431 return nullptr;
432}
433
434llvm::Optional<minidump::Range>
435MinidumpParser::FindMemoryRange(lldb::addr_t addr) {
436 llvm::ArrayRef<uint8_t> data64 = GetStream(StreamType::Memory64List);
437 Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21));
438
439 auto ExpectedMemory = GetMinidumpFile().getMemoryList();
440 if (!ExpectedMemory) {
441 LLDB_LOG_ERROR(log, ExpectedMemory.takeError(),do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedMemory.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read memory list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
442 "Failed to read memory list: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedMemory.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read memory list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);
443 } else {
444 for (const auto &memory_desc : *ExpectedMemory) {
445 const LocationDescriptor &loc_desc = memory_desc.Memory;
446 const lldb::addr_t range_start = memory_desc.StartOfMemoryRange;
447 const size_t range_size = loc_desc.DataSize;
448
449 if (loc_desc.RVA + loc_desc.DataSize > GetData().size())
450 return llvm::None;
451
452 if (range_start <= addr && addr < range_start + range_size) {
453 auto ExpectedSlice = GetMinidumpFile().getRawData(loc_desc);
454 if (!ExpectedSlice) {
455 LLDB_LOG_ERROR(log, ExpectedSlice.takeError(),do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedSlice.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to get memory slice: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
456 "Failed to get memory slice: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedSlice.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to get memory slice: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);
457 return llvm::None;
458 }
459 return minidump::Range(range_start, *ExpectedSlice);
460 }
461 }
462 }
463
464 // Some Minidumps have a Memory64ListStream that captures all the heap memory
465 // (full-memory Minidumps). We can't exactly use the same loop as above,
466 // because the Minidump uses slightly different data structures to describe
467 // those
468
469 if (!data64.empty()) {
470 llvm::ArrayRef<MinidumpMemoryDescriptor64> memory64_list;
471 uint64_t base_rva;
472 std::tie(memory64_list, base_rva) =
473 MinidumpMemoryDescriptor64::ParseMemory64List(data64);
474
475 if (memory64_list.empty())
476 return llvm::None;
477
478 for (const auto &memory_desc64 : memory64_list) {
479 const lldb::addr_t range_start = memory_desc64.start_of_memory_range;
480 const size_t range_size = memory_desc64.data_size;
481
482 if (base_rva + range_size > GetData().size())
483 return llvm::None;
484
485 if (range_start <= addr && addr < range_start + range_size) {
486 return minidump::Range(range_start,
487 GetData().slice(base_rva, range_size));
488 }
489 base_rva += range_size;
490 }
491 }
492
493 return llvm::None;
494}
495
496llvm::ArrayRef<uint8_t> MinidumpParser::GetMemory(lldb::addr_t addr,
497 size_t size) {
498 // I don't have a sense of how frequently this is called or how many memory
499 // ranges a Minidump typically has, so I'm not sure if searching for the
500 // appropriate range linearly each time is stupid. Perhaps we should build
501 // an index for faster lookups.
502 llvm::Optional<minidump::Range> range = FindMemoryRange(addr);
503 if (!range)
504 return {};
505
506 // There's at least some overlap between the beginning of the desired range
507 // (addr) and the current range. Figure out where the overlap begins and how
508 // much overlap there is.
509
510 const size_t offset = addr - range->start;
511
512 if (addr < range->start || offset >= range->range_ref.size())
513 return {};
514
515 const size_t overlap = std::min(size, range->range_ref.size() - offset);
516 return range->range_ref.slice(offset, overlap);
517}
518
519static bool
520CreateRegionsCacheFromMemoryInfoList(MinidumpParser &parser,
521 std::vector<MemoryRegionInfo> &regions) {
522 Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21));
523 auto ExpectedInfo = parser.GetMinidumpFile().getMemoryInfoList();
524 if (!ExpectedInfo) {
525 LLDB_LOG_ERROR(log, ExpectedInfo.takeError(),do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedInfo.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read memory info list: {0}"); } else ::
llvm::consumeError(::std::move(error_private)); } while (0)
526 "Failed to read memory info list: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedInfo.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read memory info list: {0}"); } else ::
llvm::consumeError(::std::move(error_private)); } while (0);
527 return false;
528 }
529 constexpr auto yes = MemoryRegionInfo::eYes;
530 constexpr auto no = MemoryRegionInfo::eNo;
531 for (const MemoryInfo &entry : *ExpectedInfo) {
532 MemoryRegionInfo region;
533 region.GetRange().SetRangeBase(entry.BaseAddress);
534 region.GetRange().SetByteSize(entry.RegionSize);
535
536 MemoryProtection prot = entry.Protect;
537 region.SetReadable(bool(prot & MemoryProtection::NoAccess) ? no : yes);
538 region.SetWritable(
539 bool(prot & (MemoryProtection::ReadWrite | MemoryProtection::WriteCopy |
540 MemoryProtection::ExecuteReadWrite |
541 MemoryProtection::ExeciteWriteCopy))
542 ? yes
543 : no);
544 region.SetExecutable(
545 bool(prot & (MemoryProtection::Execute | MemoryProtection::ExecuteRead |
546 MemoryProtection::ExecuteReadWrite |
547 MemoryProtection::ExeciteWriteCopy))
548 ? yes
549 : no);
550 region.SetMapped(entry.State != MemoryState::Free ? yes : no);
551 regions.push_back(region);
552 }
553 return !regions.empty();
554}
555
556static bool
557CreateRegionsCacheFromMemoryList(MinidumpParser &parser,
558 std::vector<MemoryRegionInfo> &regions) {
559 Log *log = GetLogIfAnyCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21));
560 auto ExpectedMemory = parser.GetMinidumpFile().getMemoryList();
561 if (!ExpectedMemory) {
562 LLDB_LOG_ERROR(log, ExpectedMemory.takeError(),do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedMemory.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read memory list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0)
563 "Failed to read memory list: {0}")do { ::lldb_private::Log *log_private = (log); ::llvm::Error error_private
= (ExpectedMemory.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/minidump/MinidumpParser.cpp"
, __func__, "Failed to read memory list: {0}"); } else ::llvm
::consumeError(::std::move(error_private)); } while (0);
564 return false;
565 }
566 regions.reserve(ExpectedMemory->size());
567 for (const MemoryDescriptor &memory_desc : *ExpectedMemory) {
568 if (memory_desc.Memory.DataSize == 0)
569 continue;
570 MemoryRegionInfo region;
571 region.GetRange().SetRangeBase(memory_desc.StartOfMemoryRange);
572 region.GetRange().SetByteSize(memory_desc.Memory.DataSize);
573 region.SetReadable(MemoryRegionInfo::eYes);
574 region.SetMapped(MemoryRegionInfo::eYes);
575 regions.push_back(region);
576 }
577 regions.shrink_to_fit();
578 return !regions.empty();
579}
580
581static bool
582CreateRegionsCacheFromMemory64List(MinidumpParser &parser,
583 std::vector<MemoryRegionInfo> &regions) {
584 llvm::ArrayRef<uint8_t> data =
585 parser.GetStream(StreamType::Memory64List);
586 if (data.empty())
587 return false;
588 llvm::ArrayRef<MinidumpMemoryDescriptor64> memory64_list;
589 uint64_t base_rva;
590 std::tie(memory64_list, base_rva) =
591 MinidumpMemoryDescriptor64::ParseMemory64List(data);
592
593 if (memory64_list.empty())
594 return false;
595
596 regions.reserve(memory64_list.size());
597 for (const auto &memory_desc : memory64_list) {
598 if (memory_desc.data_size == 0)
599 continue;
600 MemoryRegionInfo region;
601 region.GetRange().SetRangeBase(memory_desc.start_of_memory_range);
602 region.GetRange().SetByteSize(memory_desc.data_size);
603 region.SetReadable(MemoryRegionInfo::eYes);
604 region.SetMapped(MemoryRegionInfo::eYes);
605 regions.push_back(region);
606 }
607 regions.shrink_to_fit();
608 return !regions.empty();
609}
610
611std::pair<MemoryRegionInfos, bool> MinidumpParser::BuildMemoryRegions() {
612 // We create the region cache using the best source. We start with
613 // the linux maps since they are the most complete and have names for the
614 // regions. Next we try the MemoryInfoList since it has
615 // read/write/execute/map data, and then fall back to the MemoryList and
616 // Memory64List to just get a list of the memory that is mapped in this
617 // core file
618 MemoryRegionInfos result;
619 const auto &return_sorted = [&](bool is_complete) {
620 llvm::sort(result);
621 return std::make_pair(std::move(result), is_complete);
622 };
623 if (CreateRegionsCacheFromLinuxMaps(*this, result))
624 return return_sorted(true);
625 if (CreateRegionsCacheFromMemoryInfoList(*this, result))
626 return return_sorted(true);
627 if (CreateRegionsCacheFromMemoryList(*this, result))
628 return return_sorted(false);
629 CreateRegionsCacheFromMemory64List(*this, result);
630 return return_sorted(false);
631}
632
633#define ENUM_TO_CSTR(ST)case StreamType::ST: return "ST" \
634 case StreamType::ST: \
635 return #ST
636
637llvm::StringRef
638MinidumpParser::GetStreamTypeAsString(StreamType stream_type) {
639 switch (stream_type) {
640 ENUM_TO_CSTR(Unused)case StreamType::Unused: return "Unused";
641 ENUM_TO_CSTR(ThreadList)case StreamType::ThreadList: return "ThreadList";
642 ENUM_TO_CSTR(ModuleList)case StreamType::ModuleList: return "ModuleList";
643 ENUM_TO_CSTR(MemoryList)case StreamType::MemoryList: return "MemoryList";
644 ENUM_TO_CSTR(Exception)case StreamType::Exception: return "Exception";
645 ENUM_TO_CSTR(SystemInfo)case StreamType::SystemInfo: return "SystemInfo";
646 ENUM_TO_CSTR(ThreadExList)case StreamType::ThreadExList: return "ThreadExList";
647 ENUM_TO_CSTR(Memory64List)case StreamType::Memory64List: return "Memory64List";
648 ENUM_TO_CSTR(CommentA)case StreamType::CommentA: return "CommentA";
649 ENUM_TO_CSTR(CommentW)case StreamType::CommentW: return "CommentW";
650 ENUM_TO_CSTR(HandleData)case StreamType::HandleData: return "HandleData";
651 ENUM_TO_CSTR(FunctionTable)case StreamType::FunctionTable: return "FunctionTable";
652 ENUM_TO_CSTR(UnloadedModuleList)case StreamType::UnloadedModuleList: return "UnloadedModuleList";
653 ENUM_TO_CSTR(MiscInfo)case StreamType::MiscInfo: return "MiscInfo";
654 ENUM_TO_CSTR(MemoryInfoList)case StreamType::MemoryInfoList: return "MemoryInfoList";
655 ENUM_TO_CSTR(ThreadInfoList)case StreamType::ThreadInfoList: return "ThreadInfoList";
656 ENUM_TO_CSTR(HandleOperationList)case StreamType::HandleOperationList: return "HandleOperationList";
657 ENUM_TO_CSTR(Token)case StreamType::Token: return "Token";
658 ENUM_TO_CSTR(JavascriptData)case StreamType::JavascriptData: return "JavascriptData";
659 ENUM_TO_CSTR(SystemMemoryInfo)case StreamType::SystemMemoryInfo: return "SystemMemoryInfo";
660 ENUM_TO_CSTR(ProcessVMCounters)case StreamType::ProcessVMCounters: return "ProcessVMCounters";
661 ENUM_TO_CSTR(LastReserved)case StreamType::LastReserved: return "LastReserved";
662 ENUM_TO_CSTR(BreakpadInfo)case StreamType::BreakpadInfo: return "BreakpadInfo";
663 ENUM_TO_CSTR(AssertionInfo)case StreamType::AssertionInfo: return "AssertionInfo";
664 ENUM_TO_CSTR(LinuxCPUInfo)case StreamType::LinuxCPUInfo: return "LinuxCPUInfo";
665 ENUM_TO_CSTR(LinuxProcStatus)case StreamType::LinuxProcStatus: return "LinuxProcStatus";
666 ENUM_TO_CSTR(LinuxLSBRelease)case StreamType::LinuxLSBRelease: return "LinuxLSBRelease";
667 ENUM_TO_CSTR(LinuxCMDLine)case StreamType::LinuxCMDLine: return "LinuxCMDLine";
668 ENUM_TO_CSTR(LinuxEnviron)case StreamType::LinuxEnviron: return "LinuxEnviron";
669 ENUM_TO_CSTR(LinuxAuxv)case StreamType::LinuxAuxv: return "LinuxAuxv";
670 ENUM_TO_CSTR(LinuxMaps)case StreamType::LinuxMaps: return "LinuxMaps";
671 ENUM_TO_CSTR(LinuxDSODebug)case StreamType::LinuxDSODebug: return "LinuxDSODebug";
672 ENUM_TO_CSTR(LinuxProcStat)case StreamType::LinuxProcStat: return "LinuxProcStat";
673 ENUM_TO_CSTR(LinuxProcUptime)case StreamType::LinuxProcUptime: return "LinuxProcUptime";
674 ENUM_TO_CSTR(LinuxProcFD)case StreamType::LinuxProcFD: return "LinuxProcFD";
675 ENUM_TO_CSTR(FacebookAppCustomData)case StreamType::FacebookAppCustomData: return "FacebookAppCustomData";
676 ENUM_TO_CSTR(FacebookBuildID)case StreamType::FacebookBuildID: return "FacebookBuildID";
677 ENUM_TO_CSTR(FacebookAppVersionName)case StreamType::FacebookAppVersionName: return "FacebookAppVersionName";
678 ENUM_TO_CSTR(FacebookJavaStack)case StreamType::FacebookJavaStack: return "FacebookJavaStack";
679 ENUM_TO_CSTR(FacebookDalvikInfo)case StreamType::FacebookDalvikInfo: return "FacebookDalvikInfo";
680 ENUM_TO_CSTR(FacebookUnwindSymbols)case StreamType::FacebookUnwindSymbols: return "FacebookUnwindSymbols";
681 ENUM_TO_CSTR(FacebookDumpErrorLog)case StreamType::FacebookDumpErrorLog: return "FacebookDumpErrorLog";
682 ENUM_TO_CSTR(FacebookAppStateLog)case StreamType::FacebookAppStateLog: return "FacebookAppStateLog";
683 ENUM_TO_CSTR(FacebookAbortReason)case StreamType::FacebookAbortReason: return "FacebookAbortReason";
684 ENUM_TO_CSTR(FacebookThreadName)case StreamType::FacebookThreadName: return "FacebookThreadName";
685 ENUM_TO_CSTR(FacebookLogcat)case StreamType::FacebookLogcat: return "FacebookLogcat";
686 }
687 return "unknown stream type";
688}
689
690MemoryRegionInfo
691MinidumpParser::GetMemoryRegionInfo(const MemoryRegionInfos &regions,
692 lldb::addr_t load_addr) {
693 MemoryRegionInfo region;
694 auto pos = llvm::upper_bound(regions, load_addr);
695 if (pos != regions.begin() &&
696 std::prev(pos)->GetRange().Contains(load_addr)) {
697 return *std::prev(pos);
698 }
699
700 if (pos == regions.begin())
701 region.GetRange().SetRangeBase(0);
702 else
703 region.GetRange().SetRangeBase(std::prev(pos)->GetRange().GetRangeEnd());
704
705 if (pos == regions.end())
706 region.GetRange().SetRangeEnd(UINT64_MAX0xffffffffffffffffULL);
707 else
708 region.GetRange().SetRangeEnd(pos->GetRange().GetRangeBase());
709
710 region.SetReadable(MemoryRegionInfo::eNo);
711 region.SetWritable(MemoryRegionInfo::eNo);
712 region.SetExecutable(MemoryRegionInfo::eNo);
713 region.SetMapped(MemoryRegionInfo::eNo);
714 return region;
715}
←

/usr/src/gnu/usr.bin/clang/liblldbPluginProcess/../../../llvm/lldb/source/Plugins/Process/minidump/MinidumpTypes.h

1//===-- MinidumpTypes.h -----------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLDB_SOURCE_PLUGINS_PROCESS_MINIDUMP_MINIDUMPTYPES_H
10#define LLDB_SOURCE_PLUGINS_PROCESS_MINIDUMP_MINIDUMPTYPES_H
11
12#include "lldb/Utility/Status.h"
13
14#include "llvm/ADT/ArrayRef.h"
15#include "llvm/ADT/BitmaskEnum.h"
16#include "llvm/ADT/Optional.h"
17#include "llvm/ADT/SmallVector.h"
18#include "llvm/ADT/StringRef.h"
19#include "llvm/BinaryFormat/Minidump.h"
20#include "llvm/Support/ConvertUTF.h"
21#include "llvm/Support/Endian.h"
22
23// C includes
24// C++ includes
25
26// Reference:
27// https://msdn.microsoft.com/en-us/library/windows/desktop/ms679293(v=vs.85).aspx
28// https://chromium.googlesource.com/breakpad/breakpad/
29
30namespace lldb_private {
31
32namespace minidump {
33
34using namespace llvm::minidump;
35
36LLVM_ENABLE_BITMASK_ENUMS_IN_NAMESPACE()using ::llvm::BitmaskEnumDetail::operator~; using ::llvm::BitmaskEnumDetail
::operator|; using ::llvm::BitmaskEnumDetail::operator&; using
::llvm::BitmaskEnumDetail::operator^; using ::llvm::BitmaskEnumDetail
::operator|=; using ::llvm::BitmaskEnumDetail::operator&=
; using ::llvm::BitmaskEnumDetail::operator^=;
37
38enum class CvSignature : uint32_t {
39 Pdb70 = 0x53445352, // RSDS
40 ElfBuildId = 0x4270454c, // BpEL (Breakpad/Crashpad minidumps)
41};
42
43enum class MinidumpMiscInfoFlags : uint32_t {
44 ProcessID = (1 << 0),
45 ProcessTimes = (1 << 1),
46 LLVM_MARK_AS_BITMASK_ENUM(/* LargestValue = */ ProcessTimes)LLVM_BITMASK_LARGEST_ENUMERATOR = ProcessTimes
47};
48
49template <typename T>
50Status consumeObject(llvm::ArrayRef<uint8_t> &Buffer, const T *&Object) {
51 Status error;
52 if (Buffer.size() < sizeof(T)) {
7
←
Assuming the condition is true
→
8
←
Taking true branch
→
53 error.SetErrorString("Insufficient buffer!");
54 return error;
9
←
Returning without writing to 'Object'
→
55 }
56
57 Object = reinterpret_cast<const T *>(Buffer.data());
58 Buffer = Buffer.drop_front(sizeof(T));
59 return error;
60}
61
62struct MinidumpMemoryDescriptor64 {
63 llvm::support::ulittle64_t start_of_memory_range;
64 llvm::support::ulittle64_t data_size;
65
66 static std::pair<llvm::ArrayRef<MinidumpMemoryDescriptor64>, uint64_t>
67 ParseMemory64List(llvm::ArrayRef<uint8_t> &data);
68};
69static_assert(sizeof(MinidumpMemoryDescriptor64) == 16,
70 "sizeof MinidumpMemoryDescriptor64 is not correct!");
71
72// TODO misc2, misc3 ?
73// Reference:
74// https://msdn.microsoft.com/en-us/library/windows/desktop/ms680389(v=vs.85).aspx
75struct MinidumpMiscInfo {
76 llvm::support::ulittle32_t size;
77 // flags1 represents what info in the struct is valid
78 llvm::support::ulittle32_t flags1;
79 llvm::support::ulittle32_t process_id;
80 llvm::support::ulittle32_t process_create_time;
81 llvm::support::ulittle32_t process_user_time;
82 llvm::support::ulittle32_t process_kernel_time;
83
84 static const MinidumpMiscInfo *Parse(llvm::ArrayRef<uint8_t> &data);
85
86 llvm::Optional<lldb::pid_t> GetPid() const;
87};
88static_assert(sizeof(MinidumpMiscInfo) == 24,
89 "sizeof MinidumpMiscInfo is not correct!");
90
91// The /proc/pid/status is saved as an ascii string in the file
92class LinuxProcStatus {
93public:
94 llvm::StringRef proc_status;
95 lldb::pid_t pid;
96
97 static llvm::Optional<LinuxProcStatus> Parse(llvm::ArrayRef<uint8_t> &data);
98
99 lldb::pid_t GetPid() const;
100
101private:
102 LinuxProcStatus() = default;
103};
104
105} // namespace minidump
106} // namespace lldb_private
107#endif // LLDB_SOURCE_PLUGINS_PROCESS_MINIDUMP_MINIDUMPTYPES_H