| //===-- ClangExpressionParser.cpp -------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // C Includes |
| // C++ Includes |
| // Other libraries and framework includes |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/ExternalASTSource.h" |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/SourceLocation.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Basic/Version.h" |
| #include "clang/CodeGen/CodeGenAction.h" |
| #include "clang/CodeGen/ModuleBuilder.h" |
| #include "clang/Frontend/CompilerInstance.h" |
| #include "clang/Frontend/CompilerInvocation.h" |
| #include "clang/Frontend/FrontendActions.h" |
| #include "clang/Frontend/FrontendDiagnostic.h" |
| #include "clang/Frontend/FrontendPluginRegistry.h" |
| #include "clang/Frontend/TextDiagnosticBuffer.h" |
| #include "clang/Frontend/TextDiagnosticPrinter.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Parse/ParseAST.h" |
| #include "clang/Rewrite/Frontend/FrontendActions.h" |
| #include "clang/Sema/SemaConsumer.h" |
| #include "clang/StaticAnalyzer/Frontend/FrontendActions.h" |
| |
| #include "llvm/ADT/StringRef.h" |
| #include "llvm/ExecutionEngine/ExecutionEngine.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Support/FileSystem.h" |
| #include "llvm/Support/TargetSelect.h" |
| |
| #include "llvm/ExecutionEngine/MCJIT.h" |
| #include "llvm/IR/LLVMContext.h" |
| #include "llvm/IR/Module.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/DynamicLibrary.h" |
| #include "llvm/Support/Host.h" |
| #include "llvm/Support/Signals.h" |
| |
| // Project includes |
| #include "ClangExpressionParser.h" |
| |
| #include "ClangASTSource.h" |
| #include "ClangExpressionHelper.h" |
| #include "ClangExpressionDeclMap.h" |
| #include "ClangModulesDeclVendor.h" |
| #include "ClangPersistentVariables.h" |
| #include "IRForTarget.h" |
| |
| #include "lldb/Core/ArchSpec.h" |
| #include "lldb/Core/DataBufferHeap.h" |
| #include "lldb/Core/Debugger.h" |
| #include "lldb/Core/Disassembler.h" |
| #include "lldb/Core/Log.h" |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/Stream.h" |
| #include "lldb/Core/StreamFile.h" |
| #include "lldb/Core/StringList.h" |
| #include "lldb/Core/StreamString.h" |
| #include "lldb/Expression/IRExecutionUnit.h" |
| #include "lldb/Expression/IRDynamicChecks.h" |
| #include "lldb/Expression/IRInterpreter.h" |
| #include "lldb/Host/File.h" |
| #include "lldb/Host/HostInfo.h" |
| #include "lldb/Symbol/ClangASTContext.h" |
| #include "lldb/Symbol/SymbolVendor.h" |
| #include "lldb/Target/ExecutionContext.h" |
| #include "lldb/Target/ObjCLanguageRuntime.h" |
| #include "lldb/Target/Process.h" |
| #include "lldb/Target/Target.h" |
| #include "lldb/Target/Language.h" |
| |
| using namespace clang; |
| using namespace llvm; |
| using namespace lldb_private; |
| |
| //===----------------------------------------------------------------------===// |
| // Utility Methods for Clang |
| //===----------------------------------------------------------------------===// |
| |
| |
| class ClangExpressionParser::LLDBPreprocessorCallbacks : public PPCallbacks |
| { |
| ClangModulesDeclVendor &m_decl_vendor; |
| ClangPersistentVariables &m_persistent_vars; |
| StreamString m_error_stream; |
| bool m_has_errors = false; |
| |
| public: |
| LLDBPreprocessorCallbacks(ClangModulesDeclVendor &decl_vendor, |
| ClangPersistentVariables &persistent_vars) : |
| m_decl_vendor(decl_vendor), |
| m_persistent_vars(persistent_vars) |
| { |
| } |
| |
| void |
| moduleImport(SourceLocation import_location, |
| clang::ModuleIdPath path, |
| const clang::Module * /*null*/) override |
| { |
| std::vector<ConstString> string_path; |
| |
| for (const std::pair<IdentifierInfo *, SourceLocation> &component : path) |
| { |
| string_path.push_back(ConstString(component.first->getName())); |
| } |
| |
| StreamString error_stream; |
| |
| ClangModulesDeclVendor::ModuleVector exported_modules; |
| |
| if (!m_decl_vendor.AddModule(string_path, &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; |
| } |
| |
| const std::string &getErrorString() |
| { |
| return m_error_stream.GetString(); |
| } |
| }; |
| |
| //===----------------------------------------------------------------------===// |
| // Implementation of ClangExpressionParser |
| //===----------------------------------------------------------------------===// |
| |
| ClangExpressionParser::ClangExpressionParser (ExecutionContextScope *exe_scope, |
| Expression &expr, |
| bool generate_debug_info) : |
| ExpressionParser (exe_scope, expr, generate_debug_info), |
| m_compiler (), |
| m_code_generator (), |
| m_pp_callbacks(nullptr) |
| { |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); |
| |
| // 1. Create a new compiler instance. |
| m_compiler.reset(new CompilerInstance()); |
| lldb::LanguageType frame_lang = expr.Language(); // defaults to lldb::eLanguageTypeUnknown |
| bool overridden_target_opts = false; |
| lldb_private::LanguageRuntime *lang_rt = nullptr; |
| lldb::TargetSP target_sp; |
| if (exe_scope) |
| target_sp = exe_scope->CalculateTarget(); |
| |
| ArchSpec target_arch; |
| if (target_sp) |
| 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. |
| auto frame = exe_scope->CalculateStackFrame(); |
| |
| // Make sure the user hasn't provided a preferred execution language |
| // with `expression --language X -- ...` |
| if (frame && frame_lang == lldb::eLanguageTypeUnknown) |
| frame_lang = frame->GetLanguage(); |
| |
| if (frame_lang != lldb::eLanguageTypeUnknown) |
| { |
| lang_rt = exe_scope->CalculateProcess()->GetLanguageRuntime(frame_lang); |
| if (log) |
| log->Printf("Frame has language of type %s", Language::GetNameForLanguageType(frame_lang)); |
| } |
| |
| // 2. Configure the compiler with a set of default options that are appropriate |
| // for most situations. |
| if (target_sp && target_arch.IsValid()) |
| { |
| std::string triple = target_arch.GetTriple().str(); |
| m_compiler->getTargetOpts().Triple = triple; |
| if (log) |
| log->Printf("Using %s as the target triple", m_compiler->getTargetOpts().Triple.c_str()); |
| } |
| 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(); |
| if (log) |
| log->Printf("Using default target triple of %s", m_compiler->getTargetOpts().Triple.c_str()); |
| } |
| // 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(); |
| |
| // 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. |
| if (lang_rt) |
| overridden_target_opts = lang_rt->GetOverrideExprOptions(m_compiler->getTargetOpts()); |
| |
| if (overridden_target_opts) |
| if (log) |
| { |
| log->Debug("Using overridden target options for the expression evaluation"); |
| |
| auto opts = m_compiler->getTargetOpts(); |
| log->Debug("Triple: '%s'", opts.Triple.c_str()); |
| log->Debug("CPU: '%s'", opts.CPU.c_str()); |
| log->Debug("FPMath: '%s'", opts.FPMath.c_str()); |
| log->Debug("ABI: '%s'", opts.ABI.c_str()); |
| log->Debug("LinkerVersion: '%s'", opts.LinkerVersion.c_str()); |
| StringList::LogDump(log, opts.FeaturesAsWritten, "FeaturesAsWritten"); |
| StringList::LogDump(log, opts.Features, "Features"); |
| StringList::LogDump(log, opts.Reciprocals, "Reciprocals"); |
| } |
| |
| // 4. Create and install the target on the compiler. |
| m_compiler->createDiagnostics(); |
| auto target_info = TargetInfo::CreateTargetInfo(m_compiler->getDiagnostics(), m_compiler->getInvocation().TargetOpts); |
| if (log) |
| { |
| log->Printf("Using SIMD alignment: %d", target_info->getSimdDefaultAlign()); |
| log->Printf("Target datalayout string: '%s'", target_info->getDataLayoutString()); |
| log->Printf("Target ABI: '%s'", target_info->getABI().str().c_str()); |
| log->Printf("Target vector alignment: %d", target_info->getMaxVectorAlign()); |
| } |
| m_compiler->setTarget(target_info); |
| |
| assert (m_compiler->hasTarget()); |
| |
| // 5. Set language options. |
| lldb::LanguageType language = expr.Language(); |
| |
| 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. |
| m_compiler->getLangOpts().CPlusPlus = true; |
| break; |
| case lldb::eLanguageTypeObjC: |
| m_compiler->getLangOpts().ObjC1 = true; |
| m_compiler->getLangOpts().ObjC2 = true; |
| // FIXME: the following language option is a temporary workaround, |
| // to "ask for ObjC, get ObjC++" (see comment above). |
| m_compiler->getLangOpts().CPlusPlus = true; |
| break; |
| case lldb::eLanguageTypeC_plus_plus: |
| case lldb::eLanguageTypeC_plus_plus_11: |
| case lldb::eLanguageTypeC_plus_plus_14: |
| m_compiler->getLangOpts().CPlusPlus11 = true; |
| m_compiler->getHeaderSearchOpts().UseLibcxx = true; |
| LLVM_FALLTHROUGH; |
| case lldb::eLanguageTypeC_plus_plus_03: |
| m_compiler->getLangOpts().CPlusPlus = true; |
| // FIXME: the following language option is a temporary workaround, |
| // to "ask for C++, get ObjC++". Apple hopes to remove this requirement |
| // on non-Apple platforms, but for now it is needed. |
| m_compiler->getLangOpts().ObjC1 = true; |
| break; |
| case lldb::eLanguageTypeObjC_plus_plus: |
| case lldb::eLanguageTypeUnknown: |
| 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() == Expression::eResultTypeId) |
| m_compiler->getLangOpts().DebuggerCastResultToId = true; |
| |
| m_compiler->getLangOpts().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. |
| 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() == ObjCLanguageRuntime::ObjCRuntimeVersions::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()); |
| |
| // 6. Set up the diagnostic buffer for reporting errors |
| |
| m_compiler->getDiagnostics().setClient(new clang::TextDiagnosticBuffer); |
| |
| // 7. 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()) |
| { |
| ClangPersistentVariables *clang_persistent_vars = llvm::cast<ClangPersistentVariables>(target_sp->GetPersistentExpressionStateForLanguage(lldb::eLanguageTypeC)); |
| std::unique_ptr<PPCallbacks> pp_callbacks(new LLDBPreprocessorCallbacks(*decl_vendor, *clang_persistent_vars)); |
| 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. |
| 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()); |
| |
| ClangExpressionHelper *type_system_helper = dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper()); |
| ClangExpressionDeclMap *decl_map = type_system_helper->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_ast_context.reset(new ClangASTContext(m_compiler->getTargetOpts().Triple.c_str())); |
| m_ast_context->setASTContext(ast_context.get()); |
| 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->getHeaderSearchOpts(), |
| m_compiler->getPreprocessorOpts(), |
| m_compiler->getCodeGenOpts(), |
| *m_llvm_context)); |
| } |
| |
| ClangExpressionParser::~ClangExpressionParser() |
| { |
| } |
| |
| unsigned |
| ClangExpressionParser::Parse(Stream &stream) |
| { |
| TextDiagnosticBuffer *diag_buf = static_cast<TextDiagnosticBuffer *>(m_compiler->getDiagnostics().getClient()); |
| diag_buf->FlushDiagnostics(m_compiler->getDiagnostics()); |
| |
| const char *expr_text = m_expr.Text(); |
| |
| clang::SourceManager &source_mgr = m_compiler->getSourceManager(); |
| bool created_main_file = false; |
| if (m_compiler->getCodeGenOpts().getDebugInfo() == codegenoptions::FullDebugInfo) |
| { |
| int temp_fd = -1; |
| llvm::SmallString<PATH_MAX> result_path; |
| FileSpec tmpdir_file_spec; |
| if (HostInfo::GetLLDBPath(lldb::ePathTypeLLDBTempSystemDir, tmpdir_file_spec)) |
| { |
| 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::File file(temp_fd, 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(); |
| source_mgr.setMainFileID(source_mgr.createFileID(m_file_manager->getFile(result_path), |
| SourceLocation(), SrcMgr::C_User)); |
| created_main_file = true; |
| } |
| } |
| } |
| } |
| |
| if (!created_main_file) |
| { |
| std::unique_ptr<MemoryBuffer> memory_buffer = MemoryBuffer::getMemBufferCopy(expr_text, __FUNCTION__); |
| source_mgr.setMainFileID(source_mgr.createFileID(std::move(memory_buffer))); |
| } |
| |
| diag_buf->BeginSourceFile(m_compiler->getLangOpts(), &m_compiler->getPreprocessor()); |
| |
| ClangExpressionHelper *type_system_helper = dyn_cast<ClangExpressionHelper>(m_expr.GetTypeSystemHelper()); |
| |
| ASTConsumer *ast_transformer = type_system_helper->ASTTransformer(m_code_generator.get()); |
| |
| if (ClangExpressionDeclMap *decl_map = type_system_helper->DeclMap()) |
| decl_map->InstallCodeGenerator(m_code_generator.get()); |
| |
| if (ast_transformer) |
| { |
| ast_transformer->Initialize(m_compiler->getASTContext()); |
| ParseAST(m_compiler->getPreprocessor(), ast_transformer, m_compiler->getASTContext()); |
| } |
| else |
| { |
| m_code_generator->Initialize(m_compiler->getASTContext()); |
| ParseAST(m_compiler->getPreprocessor(), m_code_generator.get(), m_compiler->getASTContext()); |
| } |
| |
| diag_buf->EndSourceFile(); |
| |
| unsigned num_errors = diag_buf->getNumErrors(); |
| |
| if (m_pp_callbacks && m_pp_callbacks->hasErrors()) |
| { |
| num_errors++; |
| stream.PutCString(m_pp_callbacks->getErrorString().c_str()); |
| } |
| |
| for (TextDiagnosticBuffer::const_iterator warn = diag_buf->warn_begin(), warn_end = diag_buf->warn_end(); |
| warn != warn_end; ++warn) |
| stream.Printf("warning: %s\n", warn->second.c_str()); |
| |
| for (TextDiagnosticBuffer::const_iterator err = diag_buf->err_begin(), err_end = diag_buf->err_end(); |
| err != err_end; ++err) |
| stream.Printf("error: %s\n", err->second.c_str()); |
| |
| for (TextDiagnosticBuffer::const_iterator note = diag_buf->note_begin(), note_end = diag_buf->note_end(); |
| note != note_end; ++note) |
| stream.Printf("note: %s\n", note->second.c_str()); |
| |
| if (!num_errors) |
| { |
| if (type_system_helper->DeclMap() && !type_system_helper->DeclMap()->ResolveUnknownTypes()) |
| { |
| stream.Printf("error: Couldn't infer the type of a variable\n"); |
| num_errors++; |
| } |
| } |
| |
| return num_errors; |
| } |
| |
| static 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; |
| } |
| |
| Error |
| 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_ADDRESS; |
| func_end = LLDB_INVALID_ADDRESS; |
| Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS)); |
| |
| Error err; |
| |
| std::unique_ptr<llvm::Module> llvm_module_ap (m_code_generator->ReleaseModule()); |
| |
| if (!llvm_module_ap.get()) |
| { |
| err.SetErrorToGenericError(); |
| err.SetErrorString("IR doesn't contain a module"); |
| return err; |
| } |
| |
| // Find the actual name of the function (it's often mangled somehow) |
| |
| ConstString function_name; |
| |
| if (!FindFunctionInModule(function_name, llvm_module_ap.get(), m_expr.FunctionName())) |
| { |
| err.SetErrorToGenericError(); |
| err.SetErrorStringWithFormat("Couldn't find %s() in the module", m_expr.FunctionName()); |
| return err; |
| } |
| else |
| { |
| if (log) |
| log->Printf("Found function %s for %s", function_name.AsCString(), m_expr.FunctionName()); |
| } |
| |
| 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; |
| } |
| |
| execution_unit_sp.reset(new IRExecutionUnit (m_llvm_context, // handed off here |
| llvm_module_ap, // 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) |
| { |
| Stream *error_stream = NULL; |
| Target *target = exe_ctx.GetTargetPtr(); |
| if (target) |
| error_stream = target->GetDebugger().GetErrorFile().get(); |
| |
| IRForTarget ir_for_target(decl_map, |
| m_expr.NeedsVariableResolution(), |
| *execution_unit_sp, |
| error_stream, |
| function_name.AsCString()); |
| |
| bool ir_can_run = ir_for_target.runOnModule(*execution_unit_sp->GetModule()); |
| |
| Error interpret_error; |
| Process *process = exe_ctx.GetProcessPtr(); |
| |
| 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 (!ir_can_run) |
| { |
| err.SetErrorString("The expression could not be prepared to run in the target"); |
| return err; |
| } |
| |
| if (!can_interpret && execution_policy == eExecutionPolicyNever) |
| { |
| err.SetErrorStringWithFormat("Can't run the expression locally: %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 (execution_policy == eExecutionPolicyAlways || !can_interpret) |
| { |
| if (m_expr.NeedsValidation() && process) |
| { |
| if (!process->GetDynamicCheckers()) |
| { |
| DynamicCheckerFunctions *dynamic_checkers = new DynamicCheckerFunctions(); |
| |
| StreamString install_errors; |
| |
| if (!dynamic_checkers->Install(install_errors, exe_ctx)) |
| { |
| if (install_errors.GetString().empty()) |
| err.SetErrorString ("couldn't install checkers, unknown error"); |
| else |
| err.SetErrorString (install_errors.GetString().c_str()); |
| |
| return err; |
| } |
| |
| process->SetDynamicCheckers(dynamic_checkers); |
| |
| if (log) |
| log->Printf("== [ClangUserExpression::Evaluate] Finished installing dynamic checkers =="); |
| } |
| |
| IRDynamicChecks ir_dynamic_checks(*process->GetDynamicCheckers(), function_name.AsCString()); |
| |
| if (!ir_dynamic_checks.runOnModule(*execution_unit_sp->GetModule())) |
| { |
| err.SetErrorToGenericError(); |
| err.SetErrorString("Couldn't add dynamic checks to the expression"); |
| return err; |
| } |
| } |
| |
| execution_unit_sp->GetRunnableInfo(err, func_addr, func_end); |
| } |
| } |
| else |
| { |
| execution_unit_sp->GetRunnableInfo(err, func_addr, func_end); |
| } |
| |
| return err; |
| } |