ClangExpressionParser::ClangExpressionParser (ExecutionContextScope *exe_scope,
ClangExpression &expr,
bool generate_debug_info) :
m_expr (expr),
m_compiler (),
m_code_generator (),
m_pp_callbacks(nullptr)
{
// 1. Create a new compiler instance.
m_compiler.reset(new CompilerInstance());
// 2. Install the target.
lldb::TargetSP target_sp;
if (exe_scope)
target_sp = exe_scope->CalculateTarget();
// TODO: figure out what to really do when we don't have a valid target.
// 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. This needs to be fixed in a better way.
if (target_sp && target_sp->GetArchitecture().IsValid())
{
std::string triple = target_sp->GetArchitecture().GetTriple().str();
m_compiler->getTargetOpts().Triple = triple;
}
else
{
m_compiler->getTargetOpts().Triple = llvm::sys::getDefaultTargetTriple();
}
if (target_sp->GetArchitecture().GetMachine() == llvm::Triple::x86 ||
target_sp->GetArchitecture().GetMachine() == llvm::Triple::x86_64)
{
m_compiler->getTargetOpts().Features.push_back("+sse");
m_compiler->getTargetOpts().Features.push_back("+sse2");
}
// 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";
}
m_compiler->createDiagnostics();
// Create the target instance.
m_compiler->setTarget(TargetInfo::CreateTargetInfo(
m_compiler->getDiagnostics(), m_compiler->getInvocation().TargetOpts));
assert (m_compiler->hasTarget());
// 3. Set options.
lldb::LanguageType language = expr.Language();
switch (language)
{
case lldb::eLanguageTypeC:
break;
case lldb::eLanguageTypeObjC:
m_compiler->getLangOpts().ObjC1 = true;
m_compiler->getLangOpts().ObjC2 = true;
break;
case lldb::eLanguageTypeC_plus_plus:
m_compiler->getLangOpts().CPlusPlus = true;
m_compiler->getLangOpts().CPlusPlus11 = true;
m_compiler->getHeaderSearchOpts().UseLibcxx = true;
break;
case lldb::eLanguageTypeObjC_plus_plus:
default:
m_compiler->getLangOpts().ObjC1 = true;
m_compiler->getLangOpts().ObjC2 = true;
m_compiler->getLangOpts().CPlusPlus = true;
m_compiler->getLangOpts().CPlusPlus11 = true;
m_compiler->getHeaderSearchOpts().UseLibcxx = true;
break;
}
m_compiler->getLangOpts().Bool = true;
m_compiler->getLangOpts().WChar = true;
m_compiler->getLangOpts().Blocks = true;
m_compiler->getLangOpts().DebuggerSupport = true; // Features specifically for debugger clients
if (expr.DesiredResultType() == ClangExpression::eResultTypeId)
m_compiler->getLangOpts().DebuggerCastResultToId = true;
// 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.
m_compiler->getLangOpts().SpellChecking = false;
lldb::ProcessSP process_sp;
if (exe_scope)
process_sp = exe_scope->CalculateProcess();
if (process_sp && m_compiler->getLangOpts().ObjC1)
{
if (process_sp->GetObjCLanguageRuntime())
{
if (process_sp->GetObjCLanguageRuntime()->GetRuntimeVersion() == eAppleObjC_V2)
m_compiler->getLangOpts().ObjCRuntime.set(ObjCRuntime::MacOSX, VersionTuple(10, 7));
else
m_compiler->getLangOpts().ObjCRuntime.set(ObjCRuntime::FragileMacOSX, VersionTuple(10, 7));
if (process_sp->GetObjCLanguageRuntime()->HasNewLiteralsAndIndexing())
m_compiler->getLangOpts().DebuggerObjCLiteral = true;
}
}
m_compiler->getLangOpts().ThreadsafeStatics = false;
m_compiler->getLangOpts().AccessControl = false; // Debuggers get universal access
m_compiler->getLangOpts().DollarIdents = true; // $ indicates a persistent variable name
// Set CodeGen options
m_compiler->getCodeGenOpts().EmitDeclMetadata = true;
m_compiler->getCodeGenOpts().InstrumentFunctions = false;
m_compiler->getCodeGenOpts().DisableFPElim = true;
m_compiler->getCodeGenOpts().OmitLeafFramePointer = false;
if (generate_debug_info)
m_compiler->getCodeGenOpts().setDebugInfo(CodeGenOptions::FullDebugInfo);
else
m_compiler->getCodeGenOpts().setDebugInfo(CodeGenOptions::NoDebugInfo);
// Disable some warnings.
m_compiler->getDiagnostics().setSeverityForGroup(clang::diag::Flavor::WarningOrError,
"unused-value", clang::diag::Severity::Ignored, SourceLocation());
m_compiler->getDiagnostics().setSeverityForGroup(clang::diag::Flavor::WarningOrError,
"odr", clang::diag::Severity::Ignored, SourceLocation());
// 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->getLangOpts());
// 4. Set up the diagnostic buffer for reporting errors
m_compiler->getDiagnostics().setClient(new clang::TextDiagnosticBuffer);
// 5. Set up the source management objects inside the compiler
clang::FileSystemOptions file_system_options;
m_file_manager.reset(new clang::FileManager(file_system_options));
if (!m_compiler->hasSourceManager())
m_compiler->createSourceManager(*m_file_manager.get());
m_compiler->createFileManager();
m_compiler->createPreprocessor(TU_Complete);
if (ClangModulesDeclVendor *decl_vendor = target_sp->GetClangModulesDeclVendor())
{
std::unique_ptr<PPCallbacks> pp_callbacks(new LLDBPreprocessorCallbacks(*decl_vendor));
m_pp_callbacks = static_cast<LLDBPreprocessorCallbacks*>(pp_callbacks.get());
m_compiler->getPreprocessor().addPPCallbacks(std::move(pp_callbacks));
}
// 6. Most of this we get from the CompilerInstance, but we
// also want to give the context an ExternalASTSource.
m_selector_table.reset(new SelectorTable());
m_builtin_context.reset(new Builtin::Context());
std::unique_ptr<clang::ASTContext> ast_context(new ASTContext(m_compiler->getLangOpts(),
m_compiler->getSourceManager(),
m_compiler->getPreprocessor().getIdentifierTable(),
*m_selector_table.get(),
*m_builtin_context.get()));
ast_context->InitBuiltinTypes(m_compiler->getTarget());
ClangExpressionDeclMap *decl_map = m_expr.DeclMap();
if (decl_map)
{
llvm::IntrusiveRefCntPtr<clang::ExternalASTSource> ast_source(decl_map->CreateProxy());
decl_map->InstallASTContext(ast_context.get());
ast_context->setExternalSource(ast_source);
}
m_compiler->setASTContext(ast_context.release());
std::string module_name("$__lldb_module");
m_llvm_context.reset(new LLVMContext());
m_code_generator.reset(CreateLLVMCodeGen(m_compiler->getDiagnostics(),
module_name,
m_compiler->getCodeGenOpts(),
m_compiler->getTargetOpts(),
*m_llvm_context));
}
ClangExpressionParser::ClangExpressionParser (ExecutionContextScope *exe_scope,
ClangExpression &expr) :
m_expr (expr),
m_compiler (),
m_code_generator ()
{
// Initialize targets first, so that --version shows registered targets.
static struct InitializeLLVM {
InitializeLLVM() {
llvm::InitializeAllTargets();
llvm::InitializeAllAsmPrinters();
llvm::InitializeAllTargetMCs();
llvm::InitializeAllDisassemblers();
llvm::DisablePrettyStackTrace = true;
}
} InitializeLLVM;
// 1. Create a new compiler instance.
m_compiler.reset(new CompilerInstance());
// 2. Install the target.
lldb::TargetSP target_sp;
if (exe_scope)
target_sp = exe_scope->CalculateTarget();
// TODO: figure out what to really do when we don't have a valid target.
// 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. This needs to be fixed in a better way.
if (target_sp && target_sp->GetArchitecture().IsValid())
{
std::string triple = target_sp->GetArchitecture().GetTriple().str();
int dash_count = 0;
for (size_t i = 0; i < triple.size(); ++i)
{
if (triple[i] == '-')
dash_count++;
if (dash_count == 3)
{
triple.resize(i);
break;
}
}
m_compiler->getTargetOpts().Triple = triple;
}
else
{
m_compiler->getTargetOpts().Triple = llvm::sys::getDefaultTargetTriple();
}
if (target_sp->GetArchitecture().GetMachine() == llvm::Triple::x86 ||
target_sp->GetArchitecture().GetMachine() == llvm::Triple::x86_64)
{
m_compiler->getTargetOpts().Features.push_back("+sse");
m_compiler->getTargetOpts().Features.push_back("+sse2");
}
if (m_compiler->getTargetOpts().Triple.find("ios") != std::string::npos)
m_compiler->getTargetOpts().ABI = "apcs-gnu";
m_compiler->createDiagnostics();
// Create the target instance.
m_compiler->setTarget(TargetInfo::CreateTargetInfo(m_compiler->getDiagnostics(),
&m_compiler->getTargetOpts()));
assert (m_compiler->hasTarget());
// 3. Set options.
lldb::LanguageType language = expr.Language();
switch (language)
{
case lldb::eLanguageTypeC:
break;
case lldb::eLanguageTypeObjC:
m_compiler->getLangOpts().ObjC1 = true;
m_compiler->getLangOpts().ObjC2 = true;
break;
case lldb::eLanguageTypeC_plus_plus:
m_compiler->getLangOpts().CPlusPlus = true;
m_compiler->getLangOpts().CPlusPlus11 = true;
break;
case lldb::eLanguageTypeObjC_plus_plus:
default:
m_compiler->getLangOpts().ObjC1 = true;
m_compiler->getLangOpts().ObjC2 = true;
m_compiler->getLangOpts().CPlusPlus = true;
m_compiler->getLangOpts().CPlusPlus11 = true;
break;
}
m_compiler->getLangOpts().Bool = true;
m_compiler->getLangOpts().WChar = true;
m_compiler->getLangOpts().Blocks = true;
m_compiler->getLangOpts().DebuggerSupport = true; // Features specifically for debugger clients
if (expr.DesiredResultType() == ClangExpression::eResultTypeId)
m_compiler->getLangOpts().DebuggerCastResultToId = true;
// 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.
m_compiler->getLangOpts().SpellChecking = false;
lldb::ProcessSP process_sp;
if (exe_scope)
process_sp = exe_scope->CalculateProcess();
if (process_sp && m_compiler->getLangOpts().ObjC1)
{
if (process_sp->GetObjCLanguageRuntime())
{
if (process_sp->GetObjCLanguageRuntime()->GetRuntimeVersion() == eAppleObjC_V2)
m_compiler->getLangOpts().ObjCRuntime.set(ObjCRuntime::MacOSX, VersionTuple(10, 7));
else
m_compiler->getLangOpts().ObjCRuntime.set(ObjCRuntime::FragileMacOSX, VersionTuple(10, 7));
if (process_sp->GetObjCLanguageRuntime()->HasNewLiteralsAndIndexing())
m_compiler->getLangOpts().DebuggerObjCLiteral = true;
}
}
m_compiler->getLangOpts().ThreadsafeStatics = false;
m_compiler->getLangOpts().AccessControl = false; // Debuggers get universal access
m_compiler->getLangOpts().DollarIdents = true; // $ indicates a persistent variable name
// Set CodeGen options
m_compiler->getCodeGenOpts().EmitDeclMetadata = true;
m_compiler->getCodeGenOpts().InstrumentFunctions = false;
// Disable some warnings.
m_compiler->getDiagnostics().setDiagnosticGroupMapping("unused-value", clang::diag::MAP_IGNORE, SourceLocation());
m_compiler->getDiagnostics().setDiagnosticGroupMapping("odr", clang::diag::MAP_IGNORE, SourceLocation());
// 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().setForcedLangOptions(m_compiler->getLangOpts());
// 4. Set up the diagnostic buffer for reporting errors
m_compiler->getDiagnostics().setClient(new clang::TextDiagnosticBuffer);
// 5. Set up the source management objects inside the compiler
clang::FileSystemOptions file_system_options;
m_file_manager.reset(new clang::FileManager(file_system_options));
if (!m_compiler->hasSourceManager())
m_compiler->createSourceManager(*m_file_manager.get());
m_compiler->createFileManager();
m_compiler->createPreprocessor();
// 6. Most of this we get from the CompilerInstance, but we
// also want to give the context an ExternalASTSource.
m_selector_table.reset(new SelectorTable());
m_builtin_context.reset(new Builtin::Context());
std::unique_ptr<clang::ASTContext> ast_context(new ASTContext(m_compiler->getLangOpts(),
m_compiler->getSourceManager(),
&m_compiler->getTarget(),
m_compiler->getPreprocessor().getIdentifierTable(),
*m_selector_table.get(),
*m_builtin_context.get(),
0));
ClangExpressionDeclMap *decl_map = m_expr.DeclMap();
if (decl_map)
{
llvm::OwningPtr<clang::ExternalASTSource> ast_source(decl_map->CreateProxy());
decl_map->InstallASTContext(ast_context.get());
ast_context->setExternalSource(ast_source);
}
m_compiler->setASTContext(ast_context.release());
std::string module_name("$__lldb_module");
m_llvm_context.reset(new LLVMContext());
m_code_generator.reset(CreateLLVMCodeGen(m_compiler->getDiagnostics(),
module_name,
m_compiler->getCodeGenOpts(),
m_compiler->getTargetOpts(),
*m_llvm_context));
}