/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp

Bug Summary

File:	src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
Warning:	line 1117, column 7 Called C++ object pointer is null
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 ClangExpressionParser.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/liblldbPluginExpressionParser/obj -resource-dir /usr/local/lib/clang/13.0.0 -I /usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/llvm/include -I /usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../include -I /usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/obj -I /usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/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/liblldbPluginExpressionParser/../../../llvm/lldb/include -I /usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source -I /usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/clang/include -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/liblldbPluginExpressionParser/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/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp
1//===-- ClangExpressionParser.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//===----------------------------------------------------------------------===//

9#include "clang/AST/ASTContext.h"
10#include "clang/AST/ASTDiagnostic.h"
11#include "clang/AST/ExternalASTSource.h"
12#include "clang/AST/PrettyPrinter.h"
13#include "clang/Basic/Builtins.h"
14#include "clang/Basic/DiagnosticIDs.h"
15#include "clang/Basic/SourceLocation.h"
16#include "clang/Basic/TargetInfo.h"
17#include "clang/Basic/Version.h"
18#include "clang/CodeGen/CodeGenAction.h"
19#include "clang/CodeGen/ModuleBuilder.h"
20#include "clang/Edit/Commit.h"
21#include "clang/Edit/EditedSource.h"
22#include "clang/Edit/EditsReceiver.h"
23#include "clang/Frontend/CompilerInstance.h"
24#include "clang/Frontend/CompilerInvocation.h"
25#include "clang/Frontend/FrontendActions.h"
26#include "clang/Frontend/FrontendDiagnostic.h"
27#include "clang/Frontend/FrontendPluginRegistry.h"
28#include "clang/Frontend/TextDiagnosticBuffer.h"
29#include "clang/Frontend/TextDiagnosticPrinter.h"
30#include "clang/Lex/Preprocessor.h"
31#include "clang/Parse/ParseAST.h"
32#include "clang/Rewrite/Core/Rewriter.h"
33#include "clang/Rewrite/Frontend/FrontendActions.h"
34#include "clang/Sema/CodeCompleteConsumer.h"
35#include "clang/Sema/Sema.h"
36#include "clang/Sema/SemaConsumer.h"

38#include "llvm/ADT/StringRef.h"
39#include "llvm/ExecutionEngine/ExecutionEngine.h"
40#include "llvm/Support/CrashRecoveryContext.h"
41#include "llvm/Support/Debug.h"
42#include "llvm/Support/FileSystem.h"
43#include "llvm/Support/TargetSelect.h"

45#include "llvm/IR/LLVMContext.h"
46#include "llvm/IR/Module.h"
47#include "llvm/Support/DynamicLibrary.h"
48#include "llvm/Support/ErrorHandling.h"
49#include "llvm/Support/Host.h"
50#include "llvm/Support/MemoryBuffer.h"
51#include "llvm/Support/Signals.h"

53#include "ClangDiagnostic.h"
54#include "ClangExpressionParser.h"
55#include "ClangUserExpression.h"

57#include "ASTUtils.h"
58#include "ClangASTSource.h"
59#include "ClangDiagnostic.h"
60#include "ClangExpressionDeclMap.h"
61#include "ClangExpressionHelper.h"
62#include "ClangExpressionParser.h"
63#include "ClangHost.h"
64#include "ClangModulesDeclVendor.h"
65#include "ClangPersistentVariables.h"
66#include "IRDynamicChecks.h"
67#include "IRForTarget.h"
68#include "ModuleDependencyCollector.h"

70#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
71#include "lldb/Core/Debugger.h"
72#include "lldb/Core/Disassembler.h"
73#include "lldb/Core/Module.h"
74#include "lldb/Core/StreamFile.h"
75#include "lldb/Expression/IRExecutionUnit.h"
76#include "lldb/Expression/IRInterpreter.h"
77#include "lldb/Host/File.h"
78#include "lldb/Host/HostInfo.h"
79#include "lldb/Symbol/SymbolVendor.h"
80#include "lldb/Target/ExecutionContext.h"
81#include "lldb/Target/Language.h"
82#include "lldb/Target/Process.h"
83#include "lldb/Target/Target.h"
84#include "lldb/Target/ThreadPlanCallFunction.h"
85#include "lldb/Utility/DataBufferHeap.h"
86#include "lldb/Utility/LLDBAssert.h"
87#include "lldb/Utility/Log.h"
88#include "lldb/Utility/ReproducerProvider.h"
89#include "lldb/Utility/Stream.h"
90#include "lldb/Utility/StreamString.h"
91#include "lldb/Utility/StringList.h"

93#include "Plugins/LanguageRuntime/ObjC/ObjCLanguageRuntime.h"
94#include "Plugins/LanguageRuntime/RenderScript/RenderScriptRuntime/RenderScriptRuntime.h"

96#include <cctype>
97#include <memory>

99using namespace clang;
100using namespace llvm;
101using namespace lldb_private;

103//===----------------------------------------------------------------------===//
104// Utility Methods for Clang
105//===----------------------------------------------------------------------===//

107class ClangExpressionParser::LLDBPreprocessorCallbacks : public PPCallbacks {
ClangModulesDeclVendor &m_decl_vendor;
ClangPersistentVariables &m_persistent_vars;
clang::SourceManager &m_source_mgr;
StreamString m_error_stream;
bool m_has_errors = false;

114public:
LLDBPreprocessorCallbacks(ClangModulesDeclVendor &decl_vendor,
                          ClangPersistentVariables &persistent_vars,
                          clang::SourceManager &source_mgr)
    : m_decl_vendor(decl_vendor), m_persistent_vars(persistent_vars),
      m_source_mgr(source_mgr) {}

void moduleImport(SourceLocation import_location, clang::ModuleIdPath path,
                  const clang::Module * /*null*/) override {
  // Ignore modules that are imported in the wrapper code as these are not
  // loaded by the user.
  llvm::StringRef filename =
      m_source_mgr.getPresumedLoc(import_location).getFilename();
  if (filename == ClangExpressionSourceCode::g_prefix_file_name)
    return;

  SourceModule module;

  for (const std::pair<IdentifierInfo *, SourceLocation> &component : path)
    module.path.push_back(ConstString(component.first->getName()));

  StreamString error_stream;

  ClangModulesDeclVendor::ModuleVector exported_modules;
  if (!m_decl_vendor.AddModule(module, &exported_modules, m_error_stream))
    m_has_errors = true;

  for (ClangModulesDeclVendor::ModuleID module : exported_modules)
    m_persistent_vars.AddHandLoadedClangModule(module);
}

bool hasErrors() { return m_has_errors; }

llvm::StringRef getErrorString() { return m_error_stream.GetString(); }
148};

150static void AddAllFixIts(ClangDiagnostic *diag, const clang::Diagnostic &Info) {
for (auto &fix_it : Info.getFixItHints()) {
  if (fix_it.isNull())
    continue;
  diag->AddFixitHint(fix_it);
}
156}

158class ClangDiagnosticManagerAdapter : public clang::DiagnosticConsumer {
159public:
ClangDiagnosticManagerAdapter(DiagnosticOptions &opts) {
  DiagnosticOptions *options = new DiagnosticOptions(opts);
  options->ShowPresumedLoc = true;
  options->ShowLevel = false;
  m_os = std::make_shared<llvm::raw_string_ostream>(m_output);
  m_passthrough =
      std::make_shared<clang::TextDiagnosticPrinter>(*m_os, options);
}

void ResetManager(DiagnosticManager *manager = nullptr) {
  m_manager = manager;
}

/// Returns the last ClangDiagnostic message that the DiagnosticManager
/// received or a nullptr if the DiagnosticMangager hasn't seen any
/// Clang diagnostics yet.
ClangDiagnostic *MaybeGetLastClangDiag() const {
  if (m_manager->Diagnostics().empty())
    return nullptr;
  lldb_private::Diagnostic *diag = m_manager->Diagnostics().back().get();
  ClangDiagnostic *clang_diag = dyn_cast<ClangDiagnostic>(diag);
  return clang_diag;
}

void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
                      const clang::Diagnostic &Info) override {
  if (!m_manager) {
    // We have no DiagnosticManager before/after parsing but we still could
    // receive diagnostics (e.g., by the ASTImporter failing to copy decls
    // when we move the expression result ot the ScratchASTContext). Let's at
    // least log these diagnostics until we find a way to properly render
    // them and display them to the user.
    Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS(1u << 8)));
    if (log) {
      llvm::SmallVector<char, 32> diag_str;
      Info.FormatDiagnostic(diag_str);
      diag_str.push_back('\0');
      const char *plain_diag = diag_str.data();
      LLDB_LOG(log, "Received diagnostic outside parsing: {0}", plain_diag)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "Received diagnostic outside parsing: {0}", plain_diag
); } while (0);
    }
    return;
  }

  // Update error/warning counters.
  DiagnosticConsumer::HandleDiagnostic(DiagLevel, Info);

  // Render diagnostic message to m_output.
  m_output.clear();
  m_passthrough->HandleDiagnostic(DiagLevel, Info);
  m_os->flush();

  lldb_private::DiagnosticSeverity severity;
  bool make_new_diagnostic = true;

  switch (DiagLevel) {
  case DiagnosticsEngine::Level::Fatal:
  case DiagnosticsEngine::Level::Error:
    severity = eDiagnosticSeverityError;
    break;
  case DiagnosticsEngine::Level::Warning:
    severity = eDiagnosticSeverityWarning;
    break;
  case DiagnosticsEngine::Level::Remark:
  case DiagnosticsEngine::Level::Ignored:
    severity = eDiagnosticSeverityRemark;
    break;
  case DiagnosticsEngine::Level::Note:
    m_manager->AppendMessageToDiagnostic(m_output);
    make_new_diagnostic = false;

    // 'note:' diagnostics for errors and warnings can also contain Fix-Its.
    // We add these Fix-Its to the last error diagnostic to make sure
    // that we later have all Fix-Its related to an 'error' diagnostic when
    // we apply them to the user expression.
    auto *clang_diag = MaybeGetLastClangDiag();
    // If we don't have a previous diagnostic there is nothing to do.
    // If the previous diagnostic already has its own Fix-Its, assume that
    // the 'note:' Fix-It is just an alternative way to solve the issue and
    // ignore these Fix-Its.
    if (!clang_diag || clang_diag->HasFixIts())
      break;
    // Ignore all Fix-Its that are not associated with an error.
    if (clang_diag->GetSeverity() != eDiagnosticSeverityError)
      break;
    AddAllFixIts(clang_diag, Info);
    break;
  }
  if (make_new_diagnostic) {
    // ClangDiagnostic messages are expected to have no whitespace/newlines
    // around them.
    std::string stripped_output =
        std::string(llvm::StringRef(m_output).trim());

    auto new_diagnostic = std::make_unique<ClangDiagnostic>(
        stripped_output, severity, Info.getID());

    // Don't store away warning fixits, since the compiler doesn't have
    // enough context in an expression for the warning to be useful.
    // FIXME: Should we try to filter out FixIts that apply to our generated
    // code, and not the user's expression?
    if (severity == eDiagnosticSeverityError)
      AddAllFixIts(new_diagnostic.get(), Info);

    m_manager->AddDiagnostic(std::move(new_diagnostic));
  }
}

void BeginSourceFile(const LangOptions &LO, const Preprocessor *PP) override {
  m_passthrough->BeginSourceFile(LO, PP);
}

void EndSourceFile() override { m_passthrough->EndSourceFile(); }

273private:
DiagnosticManager *m_manager = nullptr;
std::shared_ptr<clang::TextDiagnosticPrinter> m_passthrough;
/// Output stream of m_passthrough.
std::shared_ptr<llvm::raw_string_ostream> m_os;
/// Output string filled by m_os.
std::string m_output;
280};

282static void SetupModuleHeaderPaths(CompilerInstance *compiler,
                                 std::vector<std::string> include_directories,
                                 lldb::TargetSP target_sp) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS(1u << 8)));

HeaderSearchOptions &search_opts = compiler->getHeaderSearchOpts();

for (const std::string &dir : include_directories) {
  search_opts.AddPath(dir, frontend::System, false, true);
  LLDB_LOG(log, "Added user include dir: {0}", dir)do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "Added user include dir: {0}", dir); } while (0);
}

llvm::SmallString<128> module_cache;
const auto &props = ModuleList::GetGlobalModuleListProperties();
props.GetClangModulesCachePath().GetPath(module_cache);
search_opts.ModuleCachePath = std::string(module_cache.str());
LLDB_LOG(log, "Using module cache path: {0}", module_cache.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "Using module cache path: {0}", module_cache.c_str
()); } while (0);

search_opts.ResourceDir = GetClangResourceDir().GetPath();

search_opts.ImplicitModuleMaps = true;
303}

305/// Iff the given identifier is a C++ keyword, remove it from the
306/// identifier table (i.e., make the token a normal identifier).
307static void RemoveCppKeyword(IdentifierTable &idents, llvm::StringRef token) {
// FIXME: 'using' is used by LLDB for local variables, so we can't remove
// this keyword without breaking this functionality.
if (token == "using")
  return;
// GCC's '__null' is used by LLDB to define NULL/Nil/nil.
if (token == "__null")
  return;

LangOptions cpp_lang_opts;
cpp_lang_opts.CPlusPlus = true;
cpp_lang_opts.CPlusPlus11 = true;
cpp_lang_opts.CPlusPlus20 = true;

clang::IdentifierInfo &ii = idents.get(token);
// The identifier has to be a C++-exclusive keyword. if not, then there is
// nothing to do.
if (!ii.isCPlusPlusKeyword(cpp_lang_opts))
  return;
// If the token is already an identifier, then there is nothing to do.
if (ii.getTokenID() == clang::tok::identifier)
  return;
// Otherwise the token is a C++ keyword, so turn it back into a normal
// identifier.
ii.revertTokenIDToIdentifier();
332}

334/// Remove all C++ keywords from the given identifier table.
335static void RemoveAllCppKeywords(IdentifierTable &idents) {
336#define KEYWORD(NAME, FLAGS) RemoveCppKeyword(idents, llvm::StringRef(#NAME));
337#include "clang/Basic/TokenKinds.def"
338}

340/// Configures Clang diagnostics for the expression parser.
341static void SetupDefaultClangDiagnostics(CompilerInstance &compiler) {
// List of Clang warning groups that are not useful when parsing expressions.
const std::vector<const char *> groupsToIgnore = {
    "unused-value",
    "odr",
    "unused-getter-return-value",
};
for (const char *group : groupsToIgnore) {
  compiler.getDiagnostics().setSeverityForGroup(
      clang::diag::Flavor::WarningOrError, group,
      clang::diag::Severity::Ignored, SourceLocation());
}
353}

355//===----------------------------------------------------------------------===//
356// Implementation of ClangExpressionParser
357//===----------------------------------------------------------------------===//

359ClangExpressionParser::ClangExpressionParser(
  ExecutionContextScope *exe_scope, Expression &expr,
  bool generate_debug_info, std::vector<std::string> include_directories,
  std::string filename)
  : ExpressionParser(exe_scope, expr, generate_debug_info), m_compiler(),
    m_pp_callbacks(nullptr),
    m_include_directories(std::move(include_directories)),
    m_filename(std::move(filename)) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS(1u << 8)));

// We can't compile expressions without a target.  So if the exe_scope is
// null or doesn't have a target, then we just need to get out of here.  I'll
// lldbassert and not make any of the compiler objects since
// I can't return errors directly from the constructor.  Further calls will
// check if the compiler was made and
// bag out if it wasn't.

if (!exe_scope) {
  lldbassert(exe_scope &&lldb_private::lldb_assert(static_cast<bool>(exe_scope &&
 "Can't make an expression parser with a null scope."), "exe_scope && \"Can't make an expression parser with a null scope.\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, 378)
             "Can't make an expression parser with a null scope.")lldb_private::lldb_assert(static_cast<bool>(exe_scope &&
 "Can't make an expression parser with a null scope."), "exe_scope && \"Can't make an expression parser with a null scope.\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, 378);
  return;
}

lldb::TargetSP target_sp;
target_sp = exe_scope->CalculateTarget();
if (!target_sp) {
  lldbassert(target_sp.get() &&lldb_private::lldb_assert(static_cast<bool>(target_sp.get
() && "Can't make an expression parser with a null target."
), "target_sp.get() && \"Can't make an expression parser with a null target.\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, 386)
             "Can't make an expression parser with a null target.")lldb_private::lldb_assert(static_cast<bool>(target_sp.get
() && "Can't make an expression parser with a null target."
), "target_sp.get() && \"Can't make an expression parser with a null target.\""
, __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, 386);
  return;
}

// 1. Create a new compiler instance.
m_compiler = std::make_unique<CompilerInstance>();

// When capturing a reproducer, hook up the file collector with clang to
// collector modules and headers.
if (repro::Generator *g = repro::Reproducer::Instance().GetGenerator()) {
  repro::FileProvider &fp = g->GetOrCreate<repro::FileProvider>();
  m_compiler->setModuleDepCollector(
      std::make_shared<ModuleDependencyCollectorAdaptor>(
          fp.GetFileCollector()));
  DependencyOutputOptions &opts = m_compiler->getDependencyOutputOpts();
  opts.IncludeSystemHeaders = true;
  opts.IncludeModuleFiles = true;
}

// Make sure clang uses the same VFS as LLDB.
m_compiler->createFileManager(FileSystem::Instance().GetVirtualFileSystem());

lldb::LanguageType frame_lang =
    expr.Language(); // defaults to lldb::eLanguageTypeUnknown
bool overridden_target_opts = false;
lldb_private::LanguageRuntime *lang_rt = nullptr;

std::string abi;
ArchSpec target_arch;
target_arch = target_sp->GetArchitecture();

const auto target_machine = target_arch.GetMachine();

// If the expression is being evaluated in the context of an existing stack
// frame, we introspect to see if the language runtime is available.

lldb::StackFrameSP frame_sp = exe_scope->CalculateStackFrame();
lldb::ProcessSP process_sp = exe_scope->CalculateProcess();

// Make sure the user hasn't provided a preferred execution language with
// `expression --language X -- ...`
if (frame_sp && frame_lang == lldb::eLanguageTypeUnknown)
  frame_lang = frame_sp->GetLanguage();

if (process_sp && frame_lang != lldb::eLanguageTypeUnknown) {
  lang_rt = process_sp->GetLanguageRuntime(frame_lang);
  LLDB_LOGF(log, "Frame has language of type %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Frame has language of type %s", Language
::GetNameForLanguageType(frame_lang)); } while (0)
            Language::GetNameForLanguageType(frame_lang))do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Frame has language of type %s", Language
::GetNameForLanguageType(frame_lang)); } while (0);
}

// 2. Configure the compiler with a set of default options that are
// appropriate for most situations.
if (target_arch.IsValid()) {
  std::string triple = target_arch.GetTriple().str();
  m_compiler->getTargetOpts().Triple = triple;
  LLDB_LOGF(log, "Using %s as the target triple",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Using %s as the target triple", m_compiler
->getTargetOpts().Triple.c_str()); } while (0)
            m_compiler->getTargetOpts().Triple.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Using %s as the target triple", m_compiler
->getTargetOpts().Triple.c_str()); } while (0);
} else {
  // If we get here we don't have a valid target and just have to guess.
  // Sometimes this will be ok to just use the host target triple (when we
  // evaluate say "2+3", but other expressions like breakpoint conditions and
  // other things that _are_ target specific really shouldn't just be using
  // the host triple. In such a case the language runtime should expose an
  // overridden options set (3), below.
  m_compiler->getTargetOpts().Triple = llvm::sys::getDefaultTargetTriple();
  LLDB_LOGF(log, "Using default target triple of %s",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Using default target triple of %s",
 m_compiler->getTargetOpts().Triple.c_str()); } while (0)
            m_compiler->getTargetOpts().Triple.c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Using default target triple of %s",
 m_compiler->getTargetOpts().Triple.c_str()); } while (0);
}
// Now add some special fixes for known architectures: Any arm32 iOS
// environment, but not on arm64
if (m_compiler->getTargetOpts().Triple.find("arm64") == std::string::npos &&
    m_compiler->getTargetOpts().Triple.find("arm") != std::string::npos &&
    m_compiler->getTargetOpts().Triple.find("ios") != std::string::npos) {
  m_compiler->getTargetOpts().ABI = "apcs-gnu";
}
// Supported subsets of x86
if (target_machine == llvm::Triple::x86 ||
    target_machine == llvm::Triple::x86_64) {
  m_compiler->getTargetOpts().Features.push_back("+sse");
  m_compiler->getTargetOpts().Features.push_back("+sse2");
}

// Set the target CPU to generate code for. This will be empty for any CPU
// that doesn't really need to make a special
// CPU string.
m_compiler->getTargetOpts().CPU = target_arch.GetClangTargetCPU();

// Set the target ABI
abi = GetClangTargetABI(target_arch);
if (!abi.empty())
  m_compiler->getTargetOpts().ABI = abi;

// 3. Now allow the runtime to provide custom configuration options for the
// target. In this case, a specialized language runtime is available and we
// can query it for extra options. For 99% of use cases, this will not be
// needed and should be provided when basic platform detection is not enough.
// FIXME: Generalize this. Only RenderScriptRuntime currently supports this
// currently. Hardcoding this isn't ideal but it's better than LanguageRuntime
// having knowledge of clang::TargetOpts.
if (auto *renderscript_rt =
        llvm::dyn_cast_or_null<RenderScriptRuntime>(lang_rt))
  overridden_target_opts =
      renderscript_rt->GetOverrideExprOptions(m_compiler->getTargetOpts());

if (overridden_target_opts)
  if (log && log->GetVerbose()) {
    LLDB_LOGV(do { ::lldb_private::Log *log_private = (log); if (log_private
 && log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "Using overridden target options for the expression evaluation"
); } while (0)
        log, "Using overridden target options for the expression evaluation")do { ::lldb_private::Log *log_private = (log); if (log_private
 && log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "Using overridden target options for the expression evaluation"
); } while (0);

    auto opts = m_compiler->getTargetOpts();
    LLDB_LOGV(log, "Triple: '{0}'", opts.Triple)do { ::lldb_private::Log *log_private = (log); if (log_private
 && log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "Triple: '{0}'", opts.Triple); } while (0);
    LLDB_LOGV(log, "CPU: '{0}'", opts.CPU)do { ::lldb_private::Log *log_private = (log); if (log_private
 && log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "CPU: '{0}'", opts.CPU); } while (0);
    LLDB_LOGV(log, "FPMath: '{0}'", opts.FPMath)do { ::lldb_private::Log *log_private = (log); if (log_private
 && log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "FPMath: '{0}'", opts.FPMath); } while (0);
    LLDB_LOGV(log, "ABI: '{0}'", opts.ABI)do { ::lldb_private::Log *log_private = (log); if (log_private
 && log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "ABI: '{0}'", opts.ABI); } while (0);
    LLDB_LOGV(log, "LinkerVersion: '{0}'", opts.LinkerVersion)do { ::lldb_private::Log *log_private = (log); if (log_private
 && log_private->GetVerbose()) log_private->Format
("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "LinkerVersion: '{0}'", opts.LinkerVersion); } while
 (0);
    StringList::LogDump(log, opts.FeaturesAsWritten, "FeaturesAsWritten");
    StringList::LogDump(log, opts.Features, "Features");
  }

// 4. Create and install the target on the compiler.
m_compiler->createDiagnostics();
// Limit the number of error diagnostics we emit.
// A value of 0 means no limit for both LLDB and Clang.
m_compiler->getDiagnostics().setErrorLimit(target_sp->GetExprErrorLimit());

auto target_info = TargetInfo::CreateTargetInfo(
    m_compiler->getDiagnostics(), m_compiler->getInvocation().TargetOpts);
if (log) {
  LLDB_LOGF(log, "Using SIMD alignment: %d",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Using SIMD alignment: %d", target_info
->getSimdDefaultAlign()); } while (0)
            target_info->getSimdDefaultAlign())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Using SIMD alignment: %d", target_info
->getSimdDefaultAlign()); } while (0);
  LLDB_LOGF(log, "Target datalayout string: '%s'",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Target datalayout string: '%s'", target_info
->getDataLayoutString()); } while (0)
            target_info->getDataLayoutString())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Target datalayout string: '%s'", target_info
->getDataLayoutString()); } while (0);
  LLDB_LOGF(log, "Target ABI: '%s'", target_info->getABI().str().c_str())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Target ABI: '%s'", target_info->
getABI().str().c_str()); } while (0);
  LLDB_LOGF(log, "Target vector alignment: %d",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Target vector alignment: %d", target_info
->getMaxVectorAlign()); } while (0)
            target_info->getMaxVectorAlign())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Target vector alignment: %d", target_info
->getMaxVectorAlign()); } while (0);
}
m_compiler->setTarget(target_info);

assert(m_compiler->hasTarget())((void)0);

// 5. Set language options.
lldb::LanguageType language = expr.Language();
LangOptions &lang_opts = m_compiler->getLangOpts();

switch (language) {
case lldb::eLanguageTypeC:
case lldb::eLanguageTypeC89:
case lldb::eLanguageTypeC99:
case lldb::eLanguageTypeC11:
  // FIXME: the following language option is a temporary workaround,
  // to "ask for C, get C++."
  // For now, the expression parser must use C++ anytime the language is a C
  // family language, because the expression parser uses features of C++ to
  // capture values.
  lang_opts.CPlusPlus = true;
  break;
case lldb::eLanguageTypeObjC:
  lang_opts.ObjC = true;
  // FIXME: the following language option is a temporary workaround,
  // to "ask for ObjC, get ObjC++" (see comment above).
  lang_opts.CPlusPlus = true;

  // Clang now sets as default C++14 as the default standard (with
  // GNU extensions), so we do the same here to avoid mismatches that
  // cause compiler error when evaluating expressions (e.g. nullptr not found
  // as it's a C++11 feature). Currently lldb evaluates C++14 as C++11 (see
  // two lines below) so we decide to be consistent with that, but this could
  // be re-evaluated in the future.
  lang_opts.CPlusPlus11 = true;
  break;
case lldb::eLanguageTypeC_plus_plus:
case lldb::eLanguageTypeC_plus_plus_11:
case lldb::eLanguageTypeC_plus_plus_14:
  lang_opts.CPlusPlus11 = true;
  m_compiler->getHeaderSearchOpts().UseLibcxx = true;
  LLVM_FALLTHROUGH[[gnu::fallthrough]];
case lldb::eLanguageTypeC_plus_plus_03:
  lang_opts.CPlusPlus = true;
  if (process_sp)
    lang_opts.ObjC =
        process_sp->GetLanguageRuntime(lldb::eLanguageTypeObjC) != nullptr;
  break;
case lldb::eLanguageTypeObjC_plus_plus:
case lldb::eLanguageTypeUnknown:
default:
  lang_opts.ObjC = true;
  lang_opts.CPlusPlus = true;
  lang_opts.CPlusPlus11 = true;
  m_compiler->getHeaderSearchOpts().UseLibcxx = true;
  break;
}

lang_opts.Bool = true;
lang_opts.WChar = true;
lang_opts.Blocks = true;
lang_opts.DebuggerSupport =
    true; // Features specifically for debugger clients
if (expr.DesiredResultType() == Expression::eResultTypeId)
  lang_opts.DebuggerCastResultToId = true;

lang_opts.CharIsSigned = ArchSpec(m_compiler->getTargetOpts().Triple.c_str())
                             .CharIsSignedByDefault();

// Spell checking is a nice feature, but it ends up completing a lot of types
// that we didn't strictly speaking need to complete. As a result, we spend a
// long time parsing and importing debug information.
lang_opts.SpellChecking = false;

auto *clang_expr = dyn_cast<ClangUserExpression>(&m_expr);
if (clang_expr && clang_expr->DidImportCxxModules()) {
  LLDB_LOG(log, "Adding lang options for importing C++ modules")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Format("/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, __func__, "Adding lang options for importing C++ modules");
 } while (0);

  lang_opts.Modules = true;
  // We want to implicitly build modules.
  lang_opts.ImplicitModules = true;
  // To automatically import all submodules when we import 'std'.
  lang_opts.ModulesLocalVisibility = false;

  // We use the @import statements, so we need this:
  // FIXME: We could use the modules-ts, but that currently doesn't work.
  lang_opts.ObjC = true;

  // Options we need to parse libc++ code successfully.
  // FIXME: We should ask the driver for the appropriate default flags.
  lang_opts.GNUMode = true;
  lang_opts.GNUKeywords = true;
  lang_opts.DoubleSquareBracketAttributes = true;
  lang_opts.CPlusPlus11 = true;

  // The Darwin libc expects this macro to be set.
  lang_opts.GNUCVersion = 40201;

  SetupModuleHeaderPaths(m_compiler.get(), m_include_directories,
                         target_sp);
}

if (process_sp && lang_opts.ObjC) {
  if (auto *runtime = ObjCLanguageRuntime::Get(*process_sp)) {
    if (runtime->GetRuntimeVersion() ==
        ObjCLanguageRuntime::ObjCRuntimeVersions::eAppleObjC_V2)
      lang_opts.ObjCRuntime.set(ObjCRuntime::MacOSX, VersionTuple(10, 7));
    else
      lang_opts.ObjCRuntime.set(ObjCRuntime::FragileMacOSX,
                                VersionTuple(10, 7));

    if (runtime->HasNewLiteralsAndIndexing())
      lang_opts.DebuggerObjCLiteral = true;
  }
}

lang_opts.ThreadsafeStatics = false;
lang_opts.AccessControl = false; // Debuggers get universal access
lang_opts.DollarIdents = true;   // $ indicates a persistent variable name
// We enable all builtin functions beside the builtins from libc/libm (e.g.
// 'fopen'). Those libc functions are already correctly handled by LLDB, and
// additionally enabling them as expandable builtins is breaking Clang.
lang_opts.NoBuiltin = true;

// Set CodeGen options
m_compiler->getCodeGenOpts().EmitDeclMetadata = true;
m_compiler->getCodeGenOpts().InstrumentFunctions = false;
m_compiler->getCodeGenOpts().setFramePointer(
                                  CodeGenOptions::FramePointerKind::All);
if (generate_debug_info)
  m_compiler->getCodeGenOpts().setDebugInfo(codegenoptions::FullDebugInfo);
else
  m_compiler->getCodeGenOpts().setDebugInfo(codegenoptions::NoDebugInfo);

// Disable some warnings.
SetupDefaultClangDiagnostics(*m_compiler);

// Inform the target of the language options
//
// FIXME: We shouldn't need to do this, the target should be immutable once
// created. This complexity should be lifted elsewhere.
m_compiler->getTarget().adjust(m_compiler->getDiagnostics(),
                 m_compiler->getLangOpts());

// 6. Set up the diagnostic buffer for reporting errors

auto diag_mgr = new ClangDiagnosticManagerAdapter(
    m_compiler->getDiagnostics().getDiagnosticOptions());
m_compiler->getDiagnostics().setClient(diag_mgr);

// 7. Set up the source management objects inside the compiler
m_compiler->createFileManager();
if (!m_compiler->hasSourceManager())
  m_compiler->createSourceManager(m_compiler->getFileManager());
m_compiler->createPreprocessor(TU_Complete);

switch (language) {
case lldb::eLanguageTypeC:
case lldb::eLanguageTypeC89:
case lldb::eLanguageTypeC99:
case lldb::eLanguageTypeC11:
case lldb::eLanguageTypeObjC:
  // This is not a C++ expression but we enabled C++ as explained above.
  // Remove all C++ keywords from the PP so that the user can still use
  // variables that have C++ keywords as names (e.g. 'int template;').
  RemoveAllCppKeywords(m_compiler->getPreprocessor().getIdentifierTable());
  break;
default:
  break;
}

if (auto *clang_persistent_vars = llvm::cast<ClangPersistentVariables>(
        target_sp->GetPersistentExpressionStateForLanguage(
            lldb::eLanguageTypeC))) {
  if (std::shared_ptr<ClangModulesDeclVendor> decl_vendor =
          clang_persistent_vars->GetClangModulesDeclVendor()) {
    std::unique_ptr<PPCallbacks> pp_callbacks(
        new LLDBPreprocessorCallbacks(*decl_vendor, *clang_persistent_vars,
                                      m_compiler->getSourceManager()));
    m_pp_callbacks =
        static_cast<LLDBPreprocessorCallbacks *>(pp_callbacks.get());
    m_compiler->getPreprocessor().addPPCallbacks(std::move(pp_callbacks));
  }
}

// 8. Most of this we get from the CompilerInstance, but we also want to give
// the context an ExternalASTSource.

auto &PP = m_compiler->getPreprocessor();
auto &builtin_context = PP.getBuiltinInfo();
builtin_context.initializeBuiltins(PP.getIdentifierTable(),
                                   m_compiler->getLangOpts());

m_compiler->createASTContext();
clang::ASTContext &ast_context = m_compiler->getASTContext();

m_ast_context = std::make_unique<TypeSystemClang>(
    "Expression ASTContext for '" + m_filename + "'", ast_context);

std::string module_name("$__lldb_module");

m_llvm_context = std::make_unique<LLVMContext>();
m_code_generator.reset(CreateLLVMCodeGen(
    m_compiler->getDiagnostics(), module_name,
    m_compiler->getHeaderSearchOpts(), m_compiler->getPreprocessorOpts(),
    m_compiler->getCodeGenOpts(), *m_llvm_context));
726}

728ClangExpressionParser::~ClangExpressionParser() = default;

730namespace {

732/// \class CodeComplete
733///
734/// A code completion consumer for the clang Sema that is responsible for
735/// creating the completion suggestions when a user requests completion
736/// of an incomplete `expr` invocation.
737class CodeComplete : public CodeCompleteConsumer {
CodeCompletionTUInfo m_info;

std::string m_expr;
unsigned m_position = 0;
/// The printing policy we use when printing declarations for our completion
/// descriptions.
clang::PrintingPolicy m_desc_policy;

struct CompletionWithPriority {
  CompletionResult::Completion completion;
  /// See CodeCompletionResult::Priority;
  unsigned Priority;

  /// Establishes a deterministic order in a list of CompletionWithPriority.
  /// The order returned here is the order in which the completions are
  /// displayed to the user.
  bool operator<(const CompletionWithPriority &o) const {
    // High priority results should come first.
    if (Priority != o.Priority)
      return Priority > o.Priority;

    // Identical priority, so just make sure it's a deterministic order.
    return completion.GetUniqueKey() < o.completion.GetUniqueKey();
  }
};

/// The stored completions.
/// Warning: These are in a non-deterministic order until they are sorted
/// and returned back to the caller.
std::vector<CompletionWithPriority> m_completions;

/// Returns true if the given character can be used in an identifier.
/// This also returns true for numbers because for completion we usually
/// just iterate backwards over iterators.
///
/// Note: lldb uses '$' in its internal identifiers, so we also allow this.
static bool IsIdChar(char c) {
  return c == '_' || std::isalnum(c) || c == '$';
}

/// Returns true if the given character is used to separate arguments
/// in the command line of lldb.
static bool IsTokenSeparator(char c) { return c == ' ' || c == '\t'; }

/// Drops all tokens in front of the expression that are unrelated for
/// the completion of the cmd line. 'unrelated' means here that the token
/// is not interested for the lldb completion API result.
StringRef dropUnrelatedFrontTokens(StringRef cmd) const {
  if (cmd.empty())
    return cmd;

  // If we are at the start of a word, then all tokens are unrelated to
  // the current completion logic.
  if (IsTokenSeparator(cmd.back()))
    return StringRef();

  // Remove all previous tokens from the string as they are unrelated
  // to completing the current token.
  StringRef to_remove = cmd;
  while (!to_remove.empty() && !IsTokenSeparator(to_remove.back())) {
    to_remove = to_remove.drop_back();
  }
  cmd = cmd.drop_front(to_remove.size());

  return cmd;
}

/// Removes the last identifier token from the given cmd line.
StringRef removeLastToken(StringRef cmd) const {
  while (!cmd.empty() && IsIdChar(cmd.back())) {
    cmd = cmd.drop_back();
  }
  return cmd;
}

/// Attempts to merge the given completion from the given position into the
/// existing command. Returns the completion string that can be returned to
/// the lldb completion API.
std::string mergeCompletion(StringRef existing, unsigned pos,
                            StringRef completion) const {
  StringRef existing_command = existing.substr(0, pos);
  // We rewrite the last token with the completion, so let's drop that
  // token from the command.
  existing_command = removeLastToken(existing_command);
  // We also should remove all previous tokens from the command as they
  // would otherwise be added to the completion that already has the
  // completion.
  existing_command = dropUnrelatedFrontTokens(existing_command);
  return existing_command.str() + completion.str();
}

829public:
/// Constructs a CodeComplete consumer that can be attached to a Sema.
///
/// \param[out] expr
///    The whole expression string that we are currently parsing. This
///    string needs to be equal to the input the user typed, and NOT the
///    final code that Clang is parsing.
/// \param[out] position
///    The character position of the user cursor in the `expr` parameter.
///
CodeComplete(clang::LangOptions ops, std::string expr, unsigned position)
    : CodeCompleteConsumer(CodeCompleteOptions()),
      m_info(std::make_shared<GlobalCodeCompletionAllocator>()), m_expr(expr),
      m_position(position), m_desc_policy(ops) {

  // Ensure that the printing policy is producing a description that is as
  // short as possible.
  m_desc_policy.SuppressScope = true;
  m_desc_policy.SuppressTagKeyword = true;
  m_desc_policy.FullyQualifiedName = false;
  m_desc_policy.TerseOutput = true;
  m_desc_policy.IncludeNewlines = false;
  m_desc_policy.UseVoidForZeroParams = false;
  m_desc_policy.Bool = true;
}

/// \name Code-completion filtering
/// Check if the result should be filtered out.
bool isResultFilteredOut(StringRef Filter,
                         CodeCompletionResult Result) override {
  // This code is mostly copied from CodeCompleteConsumer.
  switch (Result.Kind) {
  case CodeCompletionResult::RK_Declaration:
    return !(
        Result.Declaration->getIdentifier() &&
        Result.Declaration->getIdentifier()->getName().startswith(Filter));
  case CodeCompletionResult::RK_Keyword:
    return !StringRef(Result.Keyword).startswith(Filter);
  case CodeCompletionResult::RK_Macro:
    return !Result.Macro->getName().startswith(Filter);
  case CodeCompletionResult::RK_Pattern:
    return !StringRef(Result.Pattern->getAsString()).startswith(Filter);
  }
  // If we trigger this assert or the above switch yields a warning, then
  // CodeCompletionResult has been enhanced with more kinds of completion
  // results. Expand the switch above in this case.
  assert(false && "Unknown completion result type?")((void)0);
  // If we reach this, then we should just ignore whatever kind of unknown
  // result we got back. We probably can't turn it into any kind of useful
  // completion suggestion with the existing code.
  return true;
}

882private:
/// Generate the completion strings for the given CodeCompletionResult.
/// Note that this function has to process results that could come in
/// non-deterministic order, so this function should have no side effects.
/// To make this easier to enforce, this function and all its parameters
/// should always be const-qualified.
/// \return Returns llvm::None if no completion should be provided for the
///         given CodeCompletionResult.
llvm::Optional<CompletionWithPriority>
getCompletionForResult(const CodeCompletionResult &R) const {
  std::string ToInsert;
  std::string Description;
  // Handle the different completion kinds that come from the Sema.
  switch (R.Kind) {
  case CodeCompletionResult::RK_Declaration: {
    const NamedDecl *D = R.Declaration;
    ToInsert = R.Declaration->getNameAsString();
    // If we have a function decl that has no arguments we want to
    // complete the empty parantheses for the user. If the function has
    // arguments, we at least complete the opening bracket.
    if (const FunctionDecl *F = dyn_cast<FunctionDecl>(D)) {
      if (F->getNumParams() == 0)
        ToInsert += "()";
      else
        ToInsert += "(";
      raw_string_ostream OS(Description);
      F->print(OS, m_desc_policy, false);
      OS.flush();
    } else if (const VarDecl *V = dyn_cast<VarDecl>(D)) {
      Description = V->getType().getAsString(m_desc_policy);
    } else if (const FieldDecl *F = dyn_cast<FieldDecl>(D)) {
      Description = F->getType().getAsString(m_desc_policy);
    } else if (const NamespaceDecl *N = dyn_cast<NamespaceDecl>(D)) {
      // If we try to complete a namespace, then we can directly append
      // the '::'.
      if (!N->isAnonymousNamespace())
        ToInsert += "::";
    }
    break;
  }
  case CodeCompletionResult::RK_Keyword:
    ToInsert = R.Keyword;
    break;
  case CodeCompletionResult::RK_Macro:
    ToInsert = R.Macro->getName().str();
    break;
  case CodeCompletionResult::RK_Pattern:
    ToInsert = R.Pattern->getTypedText();
    break;
  }
  // We also filter some internal lldb identifiers here. The user
  // shouldn't see these.
  if (llvm::StringRef(ToInsert).startswith("$__lldb_"))
    return llvm::None;
  if (ToInsert.empty())
    return llvm::None;
  // Merge the suggested Token into the existing command line to comply
  // with the kind of result the lldb API expects.
  std::string CompletionSuggestion =
      mergeCompletion(m_expr, m_position, ToInsert);

  CompletionResult::Completion completion(CompletionSuggestion, Description,
                                          CompletionMode::Normal);
  return {{completion, R.Priority}};
}

948public:
/// Adds the completions to the given CompletionRequest.
void GetCompletions(CompletionRequest &request) {
  // Bring m_completions into a deterministic order and pass it on to the
  // CompletionRequest.
  llvm::sort(m_completions);

  for (const CompletionWithPriority &C : m_completions)
    request.AddCompletion(C.completion.GetCompletion(),
                          C.completion.GetDescription(),
                          C.completion.GetMode());
}

/// \name Code-completion callbacks
/// Process the finalized code-completion results.
void ProcessCodeCompleteResults(Sema &SemaRef, CodeCompletionContext Context,
                                CodeCompletionResult *Results,
                                unsigned NumResults) override {

  // The Sema put the incomplete token we try to complete in here during
  // lexing, so we need to retrieve it here to know what we are completing.
  StringRef Filter = SemaRef.getPreprocessor().getCodeCompletionFilter();

  // Iterate over all the results. Filter out results we don't want and
  // process the rest.
  for (unsigned I = 0; I != NumResults; ++I) {
    // Filter the results with the information from the Sema.
    if (!Filter.empty() && isResultFilteredOut(Filter, Results[I]))
      continue;

    CodeCompletionResult &R = Results[I];
    llvm::Optional<CompletionWithPriority> CompletionAndPriority =
        getCompletionForResult(R);
    if (!CompletionAndPriority)
      continue;
    m_completions.push_back(*CompletionAndPriority);
  }
}

/// \param S the semantic-analyzer object for which code-completion is being
/// done.
///
/// \param CurrentArg the index of the current argument.
///
/// \param Candidates an array of overload candidates.
///
/// \param NumCandidates the number of overload candidates
void ProcessOverloadCandidates(Sema &S, unsigned CurrentArg,
                               OverloadCandidate *Candidates,
                               unsigned NumCandidates,
                               SourceLocation OpenParLoc) override {
  // At the moment we don't filter out any overloaded candidates.
}

CodeCompletionAllocator &getAllocator() override {
  return m_info.getAllocator();
}

CodeCompletionTUInfo &getCodeCompletionTUInfo() override { return m_info; }
1007};
1008} // namespace

1010bool ClangExpressionParser::Complete(CompletionRequest &request, unsigned line,
                                   unsigned pos, unsigned typed_pos) {
DiagnosticManager mgr;
// We need the raw user expression here because that's what the CodeComplete
// class uses to provide completion suggestions.
// However, the `Text` method only gives us the transformed expression here.
// To actually get the raw user input here, we have to cast our expression to
// the LLVMUserExpression which exposes the right API. This should never fail
// as we always have a ClangUserExpression whenever we call this.
ClangUserExpression *llvm_expr = cast<ClangUserExpression>(&m_expr);
CodeComplete CC(m_compiler->getLangOpts(), llvm_expr->GetUserText(),
                typed_pos);
// We don't need a code generator for parsing.
m_code_generator.reset();
// Start parsing the expression with our custom code completion consumer.
ParseInternal(mgr, &CC, line, pos);
CC.GetCompletions(request);
return true;
1028}

1030unsigned ClangExpressionParser::Parse(DiagnosticManager &diagnostic_manager) {
return ParseInternal(diagnostic_manager);
1
Calling 'ClangExpressionParser::ParseInternal'→
1032}

1034unsigned
1035ClangExpressionParser::ParseInternal(DiagnosticManager &diagnostic_manager,
                                   CodeCompleteConsumer *completion_consumer,
                                   unsigned completion_line,
                                   unsigned completion_column) {
ClangDiagnosticManagerAdapter *adapter =
    static_cast<ClangDiagnosticManagerAdapter *>(
        m_compiler->getDiagnostics().getClient());

adapter->ResetManager(&diagnostic_manager);

const char *expr_text = m_expr.Text();

clang::SourceManager &source_mgr = m_compiler->getSourceManager();
bool created_main_file = false;

// Clang wants to do completion on a real file known by Clang's file manager,
// so we have to create one to make this work.
// TODO: We probably could also simulate to Clang's file manager that there
// is a real file that contains our code.
bool should_create_file = completion_consumer != nullptr;

// We also want a real file on disk if we generate full debug info.
should_create_file |= m_compiler->getCodeGenOpts().getDebugInfo() ==
2
←
Assuming the condition is false→
                      codegenoptions::FullDebugInfo;

if (should_create_file2.1
'should_create_file' is false
) {
3
←
Taking false branch→
  int temp_fd = -1;
  llvm::SmallString<128> result_path;
  if (FileSpec tmpdir_file_spec = HostInfo::GetProcessTempDir()) {
    tmpdir_file_spec.AppendPathComponent("lldb-%%%%%%.expr");
    std::string temp_source_path = tmpdir_file_spec.GetPath();
    llvm::sys::fs::createUniqueFile(temp_source_path, temp_fd, result_path);
  } else {
    llvm::sys::fs::createTemporaryFile("lldb", "expr", temp_fd, result_path);
  }

  if (temp_fd != -1) {
    lldb_private::NativeFile file(temp_fd, File::eOpenOptionWrite, true);
    const size_t expr_text_len = strlen(expr_text);
    size_t bytes_written = expr_text_len;
    if (file.Write(expr_text, bytes_written).Success()) {
      if (bytes_written == expr_text_len) {
        file.Close();
        if (auto fileEntry = m_compiler->getFileManager().getOptionalFileRef(
                result_path)) {
          source_mgr.setMainFileID(source_mgr.createFileID(
              *fileEntry,
              SourceLocation(), SrcMgr::C_User));
          created_main_file = true;
        }
      }
    }
  }
}

if (!created_main_file3.1
'created_main_file' is false
) {
4
←
Taking true branch→
  std::unique_ptr<MemoryBuffer> memory_buffer =
      MemoryBuffer::getMemBufferCopy(expr_text, m_filename);
  source_mgr.setMainFileID(source_mgr.createFileID(std::move(memory_buffer)));
}

adapter->BeginSourceFile(m_compiler->getLangOpts(),
                         &m_compiler->getPreprocessor());

ClangExpressionHelper *type_system_helper =
6
←
'type_system_helper' initialized to a null pointer value→
    dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper());
5
←
Assuming the object is not a 'ClangExpressionHelper'→

// If we want to parse for code completion, we need to attach our code
// completion consumer to the Sema and specify a completion position.
// While parsing the Sema will call this consumer with the provided
// completion suggestions.
if (completion_consumer6.1
'completion_consumer' is null
) {
7
←
Taking false branch→
  auto main_file = source_mgr.getFileEntryForID(source_mgr.getMainFileID());
  auto &PP = m_compiler->getPreprocessor();
  // Lines and columns start at 1 in Clang, but code completion positions are
  // indexed from 0, so we need to add 1 to the line and column here.
  ++completion_line;
  ++completion_column;
  PP.SetCodeCompletionPoint(main_file, completion_line, completion_column);
}

ASTConsumer *ast_transformer =
    type_system_helper->ASTTransformer(m_code_generator.get());
8
←
Called C++ object pointer is null

std::unique_ptr<clang::ASTConsumer> Consumer;
if (ast_transformer) {
  Consumer = std::make_unique<ASTConsumerForwarder>(ast_transformer);
} else if (m_code_generator) {
  Consumer = std::make_unique<ASTConsumerForwarder>(m_code_generator.get());
} else {
  Consumer = std::make_unique<ASTConsumer>();
}

clang::ASTContext &ast_context = m_compiler->getASTContext();

m_compiler->setSema(new Sema(m_compiler->getPreprocessor(), ast_context,
                             *Consumer, TU_Complete, completion_consumer));
m_compiler->setASTConsumer(std::move(Consumer));

if (ast_context.getLangOpts().Modules) {
  m_compiler->createASTReader();
  m_ast_context->setSema(&m_compiler->getSema());
}

ClangExpressionDeclMap *decl_map = type_system_helper->DeclMap();
if (decl_map) {
  decl_map->InstallCodeGenerator(&m_compiler->getASTConsumer());
  decl_map->InstallDiagnosticManager(diagnostic_manager);

  clang::ExternalASTSource *ast_source = decl_map->CreateProxy();

  if (ast_context.getExternalSource()) {
    auto module_wrapper =
        new ExternalASTSourceWrapper(ast_context.getExternalSource());

    auto ast_source_wrapper = new ExternalASTSourceWrapper(ast_source);

    auto multiplexer =
        new SemaSourceWithPriorities(*module_wrapper, *ast_source_wrapper);
    IntrusiveRefCntPtr<ExternalASTSource> Source(multiplexer);
    ast_context.setExternalSource(Source);
  } else {
    ast_context.setExternalSource(ast_source);
  }
  decl_map->InstallASTContext(*m_ast_context);
}

// Check that the ASTReader is properly attached to ASTContext and Sema.
if (ast_context.getLangOpts().Modules) {
  assert(m_compiler->getASTContext().getExternalSource() &&((void)0)
         "ASTContext doesn't know about the ASTReader?")((void)0);
  assert(m_compiler->getSema().getExternalSource() &&((void)0)
         "Sema doesn't know about the ASTReader?")((void)0);
}

{
  llvm::CrashRecoveryContextCleanupRegistrar<Sema> CleanupSema(
      &m_compiler->getSema());
  ParseAST(m_compiler->getSema(), false, false);
}

// Make sure we have no pointer to the Sema we are about to destroy.
if (ast_context.getLangOpts().Modules)
  m_ast_context->setSema(nullptr);
// Destroy the Sema. This is necessary because we want to emulate the
// original behavior of ParseAST (which also destroys the Sema after parsing).
m_compiler->setSema(nullptr);

adapter->EndSourceFile();

unsigned num_errors = adapter->getNumErrors();

if (m_pp_callbacks && m_pp_callbacks->hasErrors()) {
  num_errors++;
  diagnostic_manager.PutString(eDiagnosticSeverityError,
                               "while importing modules:");
  diagnostic_manager.AppendMessageToDiagnostic(
      m_pp_callbacks->getErrorString());
}

if (!num_errors) {
  type_system_helper->CommitPersistentDecls();
}

adapter->ResetManager();

return num_errors;
1202}

1204std::string
1205ClangExpressionParser::GetClangTargetABI(const ArchSpec &target_arch) {
std::string abi;

if (target_arch.IsMIPS()) {
  switch (target_arch.GetFlags() & ArchSpec::eMIPSABI_mask) {
  case ArchSpec::eMIPSABI_N64:
    abi = "n64";
    break;
  case ArchSpec::eMIPSABI_N32:
    abi = "n32";
    break;
  case ArchSpec::eMIPSABI_O32:
    abi = "o32";
    break;
  default:
    break;
  }
}
return abi;
1224}

1226/// Applies the given Fix-It hint to the given commit.
1227static void ApplyFixIt(const FixItHint &fixit, clang::edit::Commit &commit) {
// This is cobbed from clang::Rewrite::FixItRewriter.
if (fixit.CodeToInsert.empty()) {
  if (fixit.InsertFromRange.isValid()) {
    commit.insertFromRange(fixit.RemoveRange.getBegin(),
                           fixit.InsertFromRange, /*afterToken=*/false,
                           fixit.BeforePreviousInsertions);
    return;
  }
  commit.remove(fixit.RemoveRange);
  return;
}
if (fixit.RemoveRange.isTokenRange() ||
    fixit.RemoveRange.getBegin() != fixit.RemoveRange.getEnd()) {
  commit.replace(fixit.RemoveRange, fixit.CodeToInsert);
  return;
}
commit.insert(fixit.RemoveRange.getBegin(), fixit.CodeToInsert,
              /*afterToken=*/false, fixit.BeforePreviousInsertions);
1246}

1248bool ClangExpressionParser::RewriteExpression(
  DiagnosticManager &diagnostic_manager) {
clang::SourceManager &source_manager = m_compiler->getSourceManager();
clang::edit::EditedSource editor(source_manager, m_compiler->getLangOpts(),
                                 nullptr);
clang::edit::Commit commit(editor);
clang::Rewriter rewriter(source_manager, m_compiler->getLangOpts());

class RewritesReceiver : public edit::EditsReceiver {
  Rewriter &rewrite;

public:
  RewritesReceiver(Rewriter &in_rewrite) : rewrite(in_rewrite) {}

  void insert(SourceLocation loc, StringRef text) override {
    rewrite.InsertText(loc, text);
  }
  void replace(CharSourceRange range, StringRef text) override {
    rewrite.ReplaceText(range.getBegin(), rewrite.getRangeSize(range), text);
  }
};

RewritesReceiver rewrites_receiver(rewriter);

const DiagnosticList &diagnostics = diagnostic_manager.Diagnostics();
size_t num_diags = diagnostics.size();
if (num_diags == 0)
  return false;

for (const auto &diag : diagnostic_manager.Diagnostics()) {
  const auto *diagnostic = llvm::dyn_cast<ClangDiagnostic>(diag.get());
  if (!diagnostic)
    continue;
  if (!diagnostic->HasFixIts())
    continue;
  for (const FixItHint &fixit : diagnostic->FixIts())
    ApplyFixIt(fixit, commit);
}

// FIXME - do we want to try to propagate specific errors here?
if (!commit.isCommitable())
  return false;
else if (!editor.commit(commit))
  return false;

// Now play all the edits, and stash the result in the diagnostic manager.
editor.applyRewrites(rewrites_receiver);
RewriteBuffer &main_file_buffer =
    rewriter.getEditBuffer(source_manager.getMainFileID());

std::string fixed_expression;
llvm::raw_string_ostream out_stream(fixed_expression);

main_file_buffer.write(out_stream);
out_stream.flush();
diagnostic_manager.SetFixedExpression(fixed_expression);

return true;
1306}

1308static bool FindFunctionInModule(ConstString &mangled_name,
                               llvm::Module *module, const char *orig_name) {
for (const auto &func : module->getFunctionList()) {
  const StringRef &name = func.getName();
  if (name.find(orig_name) != StringRef::npos) {
    mangled_name.SetString(name);
    return true;
  }
}

return false;
1319}

1321lldb_private::Status ClangExpressionParser::PrepareForExecution(
  lldb::addr_t &func_addr, lldb::addr_t &func_end,
  lldb::IRExecutionUnitSP &execution_unit_sp, ExecutionContext &exe_ctx,
  bool &can_interpret, ExecutionPolicy execution_policy) {
func_addr = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;
func_end = LLDB_INVALID_ADDRESS0xffffffffffffffffULL;
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_EXPRESSIONS(1u << 8)));

lldb_private::Status err;

std::unique_ptr<llvm::Module> llvm_module_up(
    m_code_generator->ReleaseModule());

if (!llvm_module_up) {
  err.SetErrorToGenericError();
  err.SetErrorString("IR doesn't contain a module");
  return err;
}

ConstString function_name;

if (execution_policy != eExecutionPolicyTopLevel) {
  // Find the actual name of the function (it's often mangled somehow)

  if (!FindFunctionInModule(function_name, llvm_module_up.get(),
                            m_expr.FunctionName())) {
    err.SetErrorToGenericError();
    err.SetErrorStringWithFormat("Couldn't find %s() in the module",
                                 m_expr.FunctionName());
    return err;
  } else {
    LLDB_LOGF(log, "Found function %s for %s", function_name.AsCString(),do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Found function %s for %s", function_name
.AsCString(), m_expr.FunctionName()); } while (0)
              m_expr.FunctionName())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("Found function %s for %s", function_name
.AsCString(), m_expr.FunctionName()); } while (0);
  }
}

SymbolContext sc;

if (lldb::StackFrameSP frame_sp = exe_ctx.GetFrameSP()) {
  sc = frame_sp->GetSymbolContext(lldb::eSymbolContextEverything);
} else if (lldb::TargetSP target_sp = exe_ctx.GetTargetSP()) {
  sc.target_sp = target_sp;
}

LLVMUserExpression::IRPasses custom_passes;
{
  auto lang = m_expr.Language();
  LLDB_LOGF(log, "%s - Current expression language is %s\n", __FUNCTION__,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Current expression language is %s\n"
, __FUNCTION__, Language::GetNameForLanguageType(lang)); } while
 (0)
            Language::GetNameForLanguageType(lang))do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Current expression language is %s\n"
, __FUNCTION__, Language::GetNameForLanguageType(lang)); } while
 (0);
  lldb::ProcessSP process_sp = exe_ctx.GetProcessSP();
  if (process_sp && lang != lldb::eLanguageTypeUnknown) {
    auto runtime = process_sp->GetLanguageRuntime(lang);
    if (runtime)
      runtime->GetIRPasses(custom_passes);
  }
}

if (custom_passes.EarlyPasses) {
  LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Early IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0)
            "%s - Running Early IR Passes from LanguageRuntime on "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Early IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0)
            "expression module '%s'",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Early IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0)
            __FUNCTION__, m_expr.FunctionName())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Early IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0);

  custom_passes.EarlyPasses->run(*llvm_module_up);
}

execution_unit_sp = std::make_shared<IRExecutionUnit>(
    m_llvm_context, // handed off here
    llvm_module_up, // handed off here
    function_name, exe_ctx.GetTargetSP(), sc,
    m_compiler->getTargetOpts().Features);

ClangExpressionHelper *type_system_helper =
    dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper());
ClangExpressionDeclMap *decl_map =
    type_system_helper->DeclMap(); // result can be NULL

if (decl_map) {
  StreamString error_stream;
  IRForTarget ir_for_target(decl_map, m_expr.NeedsVariableResolution(),
                            *execution_unit_sp, error_stream,
                            function_name.AsCString());

  if (!ir_for_target.runOnModule(*execution_unit_sp->GetModule())) {
    err.SetErrorString(error_stream.GetString());
    return err;
  }

  Process *process = exe_ctx.GetProcessPtr();

  if (execution_policy != eExecutionPolicyAlways &&
      execution_policy != eExecutionPolicyTopLevel) {
    lldb_private::Status interpret_error;

    bool interpret_function_calls =
        !process ? false : process->CanInterpretFunctionCalls();
    can_interpret = IRInterpreter::CanInterpret(
        *execution_unit_sp->GetModule(), *execution_unit_sp->GetFunction(),
        interpret_error, interpret_function_calls);

    if (!can_interpret && execution_policy == eExecutionPolicyNever) {
      err.SetErrorStringWithFormat(
          "Can't evaluate the expression without a running target due to: %s",
          interpret_error.AsCString());
      return err;
    }
  }

  if (!process && execution_policy == eExecutionPolicyAlways) {
    err.SetErrorString("Expression needed to run in the target, but the "
                       "target can't be run");
    return err;
  }

  if (!process && execution_policy == eExecutionPolicyTopLevel) {
    err.SetErrorString("Top-level code needs to be inserted into a runnable "
                       "target, but the target can't be run");
    return err;
  }

  if (execution_policy == eExecutionPolicyAlways ||
      (execution_policy != eExecutionPolicyTopLevel && !can_interpret)) {
    if (m_expr.NeedsValidation() && process) {
      if (!process->GetDynamicCheckers()) {
        ClangDynamicCheckerFunctions *dynamic_checkers =
            new ClangDynamicCheckerFunctions();

        DiagnosticManager install_diagnostics;

        if (!dynamic_checkers->Install(install_diagnostics, exe_ctx)) {
          if (install_diagnostics.Diagnostics().size())
            err.SetErrorString(install_diagnostics.GetString().c_str());
          else
            err.SetErrorString("couldn't install checkers, unknown error");

          return err;
        }

        process->SetDynamicCheckers(dynamic_checkers);

        LLDB_LOGF(log, "== [ClangExpressionParser::PrepareForExecution] "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("== [ClangExpressionParser::PrepareForExecution] "
 "Finished installing dynamic checkers =="); } while (0)
                       "Finished installing dynamic checkers ==")do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("== [ClangExpressionParser::PrepareForExecution] "
 "Finished installing dynamic checkers =="); } while (0);
      }

      if (auto *checker_funcs = llvm::dyn_cast<ClangDynamicCheckerFunctions>(
              process->GetDynamicCheckers())) {
        IRDynamicChecks ir_dynamic_checks(*checker_funcs,
                                          function_name.AsCString());

        llvm::Module *module = execution_unit_sp->GetModule();
        if (!module || !ir_dynamic_checks.runOnModule(*module)) {
          err.SetErrorToGenericError();
          err.SetErrorString("Couldn't add dynamic checks to the expression");
          return err;
        }

        if (custom_passes.LatePasses) {
          LLDB_LOGF(log,do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Late IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0)
                    "%s - Running Late IR Passes from LanguageRuntime on "do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Late IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0)
                    "expression module '%s'",do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Late IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0)
                    __FUNCTION__, m_expr.FunctionName())do { ::lldb_private::Log *log_private = (log); if (log_private
) log_private->Printf("%s - Running Late IR Passes from LanguageRuntime on "
 "expression module '%s'", __FUNCTION__, m_expr.FunctionName(
)); } while (0);

          custom_passes.LatePasses->run(*module);
        }
      }
    }
  }

  if (execution_policy == eExecutionPolicyAlways ||
      execution_policy == eExecutionPolicyTopLevel || !can_interpret) {
    execution_unit_sp->GetRunnableInfo(err, func_addr, func_end);
  }
} else {
  execution_unit_sp->GetRunnableInfo(err, func_addr, func_end);
}

return err;
1498}

1500lldb_private::Status ClangExpressionParser::RunStaticInitializers(
  lldb::IRExecutionUnitSP &execution_unit_sp, ExecutionContext &exe_ctx) {
lldb_private::Status err;

lldbassert(execution_unit_sp.get())lldb_private::lldb_assert(static_cast<bool>(execution_unit_sp
.get()), "execution_unit_sp.get()", __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, 1504);
lldbassert(exe_ctx.HasThreadScope())lldb_private::lldb_assert(static_cast<bool>(exe_ctx.HasThreadScope
()), "exe_ctx.HasThreadScope()", __FUNCTION__, "/usr/src/gnu/usr.bin/clang/liblldbPluginExpressionParser/../../../llvm/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionParser.cpp"
, 1505);

if (!execution_unit_sp.get()) {
  err.SetErrorString(
      "can't run static initializers for a NULL execution unit");
  return err;
}

if (!exe_ctx.HasThreadScope()) {
  err.SetErrorString("can't run static initializers without a thread");
  return err;
}

std::vector<lldb::addr_t> static_initializers;

execution_unit_sp->GetStaticInitializers(static_initializers);

for (lldb::addr_t static_initializer : static_initializers) {
  EvaluateExpressionOptions options;

  lldb::ThreadPlanSP call_static_initializer(new ThreadPlanCallFunction(
      exe_ctx.GetThreadRef(), Address(static_initializer), CompilerType(),
      llvm::ArrayRef<lldb::addr_t>(), options));

  DiagnosticManager execution_errors;
  lldb::ExpressionResults results =
      exe_ctx.GetThreadRef().GetProcess()->RunThreadPlan(
          exe_ctx, call_static_initializer, options, execution_errors);

  if (results != lldb::eExpressionCompleted) {
    err.SetErrorStringWithFormat("couldn't run static initializer: %s",
                                 execution_errors.GetString().c_str());
    return err;
  }
}

return err;
1542}