forked from OSchip/llvm-project
599 lines
22 KiB
C++
599 lines
22 KiB
C++
//===-- ClangExpressionParser.cpp -------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/lldb-python.h"
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#include "lldb/Expression/ClangExpressionParser.h"
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#include "lldb/Core/ArchSpec.h"
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#include "lldb/Core/DataBufferHeap.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Disassembler.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Expression/ClangASTSource.h"
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#include "lldb/Expression/ClangExpression.h"
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#include "lldb/Expression/ClangExpressionDeclMap.h"
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#include "lldb/Expression/IRExecutionUnit.h"
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#include "lldb/Expression/IRDynamicChecks.h"
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#include "lldb/Expression/IRInterpreter.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/ObjCLanguageRuntime.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ExternalASTSource.h"
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#include "clang/Basic/FileManager.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Basic/Version.h"
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#include "clang/CodeGen/CodeGenAction.h"
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#include "clang/CodeGen/ModuleBuilder.h"
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#include "clang/Driver/CC1Options.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/FrontendActions.h"
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#include "clang/Frontend/FrontendDiagnostic.h"
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#include "clang/Frontend/FrontendPluginRegistry.h"
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#include "clang/Frontend/TextDiagnosticBuffer.h"
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#include "clang/Frontend/TextDiagnosticPrinter.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Parse/ParseAST.h"
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#include "clang/Rewrite/Frontend/FrontendActions.h"
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#include "clang/Sema/SemaConsumer.h"
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#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ExecutionEngine/ExecutionEngine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/PathV1.h"
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#include "llvm/Support/TargetSelect.h"
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#if defined(__FreeBSD__)
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#define USE_STANDARD_JIT
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#endif
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#if defined (USE_STANDARD_JIT)
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#include "llvm/ExecutionEngine/JIT.h"
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#else
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#include "llvm/ExecutionEngine/MCJIT.h"
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#endif
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/DynamicLibrary.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/Signals.h"
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using namespace clang;
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using namespace llvm;
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using namespace lldb_private;
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//===----------------------------------------------------------------------===//
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// Utility Methods for Clang
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//===----------------------------------------------------------------------===//
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std::string GetBuiltinIncludePath(const char *Argv0) {
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llvm::sys::Path P =
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llvm::sys::Path::GetMainExecutable(Argv0,
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(void*)(intptr_t) GetBuiltinIncludePath);
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if (!P.isEmpty()) {
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P.eraseComponent(); // Remove /clang from foo/bin/clang
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P.eraseComponent(); // Remove /bin from foo/bin
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// Get foo/lib/clang/<version>/include
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P.appendComponent("lib");
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P.appendComponent("clang");
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P.appendComponent(CLANG_VERSION_STRING);
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P.appendComponent("include");
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}
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return P.str();
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}
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//===----------------------------------------------------------------------===//
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// Main driver for Clang
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//===----------------------------------------------------------------------===//
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static void LLVMErrorHandler(void *UserData, const std::string &Message) {
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DiagnosticsEngine &Diags = *static_cast<DiagnosticsEngine*>(UserData);
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Diags.Report(diag::err_fe_error_backend) << Message;
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// We cannot recover from llvm errors.
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assert(0);
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}
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static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) {
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using namespace clang::frontend;
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switch (CI.getFrontendOpts().ProgramAction) {
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default:
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llvm_unreachable("Invalid program action!");
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case ASTDump: return new ASTDumpAction();
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case ASTPrint: return new ASTPrintAction();
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case ASTDumpXML: return new ASTDumpXMLAction();
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case ASTView: return new ASTViewAction();
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case DumpRawTokens: return new DumpRawTokensAction();
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case DumpTokens: return new DumpTokensAction();
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case EmitAssembly: return new EmitAssemblyAction();
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case EmitBC: return new EmitBCAction();
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case EmitHTML: return new HTMLPrintAction();
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case EmitLLVM: return new EmitLLVMAction();
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case EmitLLVMOnly: return new EmitLLVMOnlyAction();
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case EmitCodeGenOnly: return new EmitCodeGenOnlyAction();
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case EmitObj: return new EmitObjAction();
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case FixIt: return new FixItAction();
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case GeneratePCH: return new GeneratePCHAction();
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case GeneratePTH: return new GeneratePTHAction();
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case InitOnly: return new InitOnlyAction();
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case ParseSyntaxOnly: return new SyntaxOnlyAction();
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case PluginAction: {
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for (FrontendPluginRegistry::iterator it =
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FrontendPluginRegistry::begin(), ie = FrontendPluginRegistry::end();
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it != ie; ++it) {
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if (it->getName() == CI.getFrontendOpts().ActionName) {
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llvm::OwningPtr<PluginASTAction> P(it->instantiate());
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if (!P->ParseArgs(CI, CI.getFrontendOpts().PluginArgs))
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return 0;
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return P.take();
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}
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}
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CI.getDiagnostics().Report(diag::err_fe_invalid_plugin_name)
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<< CI.getFrontendOpts().ActionName;
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return 0;
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}
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case PrintDeclContext: return new DeclContextPrintAction();
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case PrintPreamble: return new PrintPreambleAction();
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case PrintPreprocessedInput: return new PrintPreprocessedAction();
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case RewriteMacros: return new RewriteMacrosAction();
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case RewriteObjC: return new RewriteObjCAction();
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case RewriteTest: return new RewriteTestAction();
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//case RunAnalysis: return new AnalysisAction();
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case RunPreprocessorOnly: return new PreprocessOnlyAction();
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}
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}
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static FrontendAction *CreateFrontendAction(CompilerInstance &CI) {
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// Create the underlying action.
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FrontendAction *Act = CreateFrontendBaseAction(CI);
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if (!Act)
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return 0;
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// If there are any AST files to merge, create a frontend action
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// adaptor to perform the merge.
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if (!CI.getFrontendOpts().ASTMergeFiles.empty())
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Act = new ASTMergeAction(Act, CI.getFrontendOpts().ASTMergeFiles);
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return Act;
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}
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//===----------------------------------------------------------------------===//
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// Implementation of ClangExpressionParser
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//===----------------------------------------------------------------------===//
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ClangExpressionParser::ClangExpressionParser (ExecutionContextScope *exe_scope,
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ClangExpression &expr) :
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m_expr (expr),
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m_compiler (),
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m_code_generator ()
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{
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// Initialize targets first, so that --version shows registered targets.
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static struct InitializeLLVM {
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InitializeLLVM() {
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llvm::InitializeAllTargets();
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llvm::InitializeAllAsmPrinters();
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llvm::InitializeAllTargetMCs();
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llvm::InitializeAllDisassemblers();
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llvm::DisablePrettyStackTrace = true;
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}
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} InitializeLLVM;
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// 1. Create a new compiler instance.
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m_compiler.reset(new CompilerInstance());
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// 2. Install the target.
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lldb::TargetSP target_sp;
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if (exe_scope)
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target_sp = exe_scope->CalculateTarget();
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// TODO: figure out what to really do when we don't have a valid target.
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// Sometimes this will be ok to just use the host target triple (when we
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// evaluate say "2+3", but other expressions like breakpoint conditions
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// and other things that _are_ target specific really shouldn't just be
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// using the host triple. This needs to be fixed in a better way.
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if (target_sp && target_sp->GetArchitecture().IsValid())
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{
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std::string triple = target_sp->GetArchitecture().GetTriple().str();
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int dash_count = 0;
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for (size_t i = 0; i < triple.size(); ++i)
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{
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if (triple[i] == '-')
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dash_count++;
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if (dash_count == 3)
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{
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triple.resize(i);
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break;
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}
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}
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m_compiler->getTargetOpts().Triple = triple;
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}
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else
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{
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m_compiler->getTargetOpts().Triple = llvm::sys::getDefaultTargetTriple();
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}
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if (target_sp->GetArchitecture().GetMachine() == llvm::Triple::x86 ||
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target_sp->GetArchitecture().GetMachine() == llvm::Triple::x86_64)
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{
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m_compiler->getTargetOpts().Features.push_back("+sse");
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m_compiler->getTargetOpts().Features.push_back("+sse2");
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}
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if (m_compiler->getTargetOpts().Triple.find("ios") != std::string::npos)
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m_compiler->getTargetOpts().ABI = "apcs-gnu";
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m_compiler->createDiagnostics();
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// Create the target instance.
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m_compiler->setTarget(TargetInfo::CreateTargetInfo(m_compiler->getDiagnostics(),
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&m_compiler->getTargetOpts()));
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assert (m_compiler->hasTarget());
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// 3. Set options.
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lldb::LanguageType language = expr.Language();
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switch (language)
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{
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case lldb::eLanguageTypeC:
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break;
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case lldb::eLanguageTypeObjC:
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m_compiler->getLangOpts().ObjC1 = true;
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m_compiler->getLangOpts().ObjC2 = true;
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break;
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case lldb::eLanguageTypeC_plus_plus:
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m_compiler->getLangOpts().CPlusPlus = true;
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m_compiler->getLangOpts().CPlusPlus11 = true;
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break;
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case lldb::eLanguageTypeObjC_plus_plus:
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default:
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m_compiler->getLangOpts().ObjC1 = true;
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m_compiler->getLangOpts().ObjC2 = true;
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m_compiler->getLangOpts().CPlusPlus = true;
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m_compiler->getLangOpts().CPlusPlus11 = true;
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break;
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}
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m_compiler->getLangOpts().Bool = true;
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m_compiler->getLangOpts().WChar = true;
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m_compiler->getLangOpts().Blocks = true;
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m_compiler->getLangOpts().DebuggerSupport = true; // Features specifically for debugger clients
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if (expr.DesiredResultType() == ClangExpression::eResultTypeId)
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m_compiler->getLangOpts().DebuggerCastResultToId = true;
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// Spell checking is a nice feature, but it ends up completing a
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// lot of types that we didn't strictly speaking need to complete.
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// As a result, we spend a long time parsing and importing debug
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// information.
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m_compiler->getLangOpts().SpellChecking = false;
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lldb::ProcessSP process_sp;
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if (exe_scope)
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process_sp = exe_scope->CalculateProcess();
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if (process_sp && m_compiler->getLangOpts().ObjC1)
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{
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if (process_sp->GetObjCLanguageRuntime())
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{
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if (process_sp->GetObjCLanguageRuntime()->GetRuntimeVersion() == eAppleObjC_V2)
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m_compiler->getLangOpts().ObjCRuntime.set(ObjCRuntime::MacOSX, VersionTuple(10, 7));
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else
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m_compiler->getLangOpts().ObjCRuntime.set(ObjCRuntime::FragileMacOSX, VersionTuple(10, 7));
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if (process_sp->GetObjCLanguageRuntime()->HasNewLiteralsAndIndexing())
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m_compiler->getLangOpts().DebuggerObjCLiteral = true;
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}
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}
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m_compiler->getLangOpts().ThreadsafeStatics = false;
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m_compiler->getLangOpts().AccessControl = false; // Debuggers get universal access
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m_compiler->getLangOpts().DollarIdents = true; // $ indicates a persistent variable name
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// Set CodeGen options
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m_compiler->getCodeGenOpts().EmitDeclMetadata = true;
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m_compiler->getCodeGenOpts().InstrumentFunctions = false;
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// Disable some warnings.
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m_compiler->getDiagnostics().setDiagnosticGroupMapping("unused-value", clang::diag::MAP_IGNORE, SourceLocation());
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m_compiler->getDiagnostics().setDiagnosticGroupMapping("odr", clang::diag::MAP_IGNORE, SourceLocation());
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// Inform the target of the language options
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//
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// FIXME: We shouldn't need to do this, the target should be immutable once
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// created. This complexity should be lifted elsewhere.
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m_compiler->getTarget().setForcedLangOptions(m_compiler->getLangOpts());
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// 4. Set up the diagnostic buffer for reporting errors
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m_compiler->getDiagnostics().setClient(new clang::TextDiagnosticBuffer);
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// 5. Set up the source management objects inside the compiler
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clang::FileSystemOptions file_system_options;
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m_file_manager.reset(new clang::FileManager(file_system_options));
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if (!m_compiler->hasSourceManager())
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m_compiler->createSourceManager(*m_file_manager.get());
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m_compiler->createFileManager();
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m_compiler->createPreprocessor();
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// 6. Most of this we get from the CompilerInstance, but we
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// also want to give the context an ExternalASTSource.
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m_selector_table.reset(new SelectorTable());
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m_builtin_context.reset(new Builtin::Context());
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std::unique_ptr<clang::ASTContext> ast_context(new ASTContext(m_compiler->getLangOpts(),
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m_compiler->getSourceManager(),
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&m_compiler->getTarget(),
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m_compiler->getPreprocessor().getIdentifierTable(),
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*m_selector_table.get(),
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*m_builtin_context.get(),
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0));
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ClangExpressionDeclMap *decl_map = m_expr.DeclMap();
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if (decl_map)
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{
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llvm::OwningPtr<clang::ExternalASTSource> ast_source(decl_map->CreateProxy());
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decl_map->InstallASTContext(ast_context.get());
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ast_context->setExternalSource(ast_source);
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}
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m_compiler->setASTContext(ast_context.release());
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std::string module_name("$__lldb_module");
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m_llvm_context.reset(new LLVMContext());
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m_code_generator.reset(CreateLLVMCodeGen(m_compiler->getDiagnostics(),
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module_name,
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m_compiler->getCodeGenOpts(),
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m_compiler->getTargetOpts(),
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*m_llvm_context));
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}
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ClangExpressionParser::~ClangExpressionParser()
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{
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}
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unsigned
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ClangExpressionParser::Parse (Stream &stream)
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{
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TextDiagnosticBuffer *diag_buf = static_cast<TextDiagnosticBuffer*>(m_compiler->getDiagnostics().getClient());
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diag_buf->FlushDiagnostics (m_compiler->getDiagnostics());
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MemoryBuffer *memory_buffer = MemoryBuffer::getMemBufferCopy(m_expr.Text(), __FUNCTION__);
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m_compiler->getSourceManager().createMainFileIDForMemBuffer (memory_buffer);
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diag_buf->BeginSourceFile(m_compiler->getLangOpts(), &m_compiler->getPreprocessor());
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ASTConsumer *ast_transformer = m_expr.ASTTransformer(m_code_generator.get());
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if (ast_transformer)
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ParseAST(m_compiler->getPreprocessor(), ast_transformer, m_compiler->getASTContext());
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else
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ParseAST(m_compiler->getPreprocessor(), m_code_generator.get(), m_compiler->getASTContext());
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diag_buf->EndSourceFile();
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TextDiagnosticBuffer::const_iterator diag_iterator;
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int num_errors = 0;
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for (diag_iterator = diag_buf->warn_begin();
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diag_iterator != diag_buf->warn_end();
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++diag_iterator)
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stream.Printf("warning: %s\n", (*diag_iterator).second.c_str());
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num_errors = 0;
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for (diag_iterator = diag_buf->err_begin();
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diag_iterator != diag_buf->err_end();
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++diag_iterator)
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{
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num_errors++;
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stream.Printf("error: %s\n", (*diag_iterator).second.c_str());
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}
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for (diag_iterator = diag_buf->note_begin();
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diag_iterator != diag_buf->note_end();
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++diag_iterator)
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stream.Printf("note: %s\n", (*diag_iterator).second.c_str());
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if (!num_errors)
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{
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if (m_expr.DeclMap() && !m_expr.DeclMap()->ResolveUnknownTypes())
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{
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stream.Printf("error: Couldn't infer the type of a variable\n");
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num_errors++;
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}
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}
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return num_errors;
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}
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static bool FindFunctionInModule (ConstString &mangled_name,
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llvm::Module *module,
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const char *orig_name)
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{
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for (llvm::Module::iterator fi = module->getFunctionList().begin(), fe = module->getFunctionList().end();
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fi != fe;
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++fi)
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{
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if (fi->getName().str().find(orig_name) != std::string::npos)
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{
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mangled_name.SetCString(fi->getName().str().c_str());
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return true;
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}
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}
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return false;
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}
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Error
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ClangExpressionParser::PrepareForExecution (lldb::addr_t &func_addr,
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lldb::addr_t &func_end,
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std::unique_ptr<IRExecutionUnit> &execution_unit_ap,
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ExecutionContext &exe_ctx,
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bool &can_interpret,
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ExecutionPolicy execution_policy)
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{
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func_addr = LLDB_INVALID_ADDRESS;
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func_end = LLDB_INVALID_ADDRESS;
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Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_EXPRESSIONS));
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std::unique_ptr<llvm::ExecutionEngine> execution_engine_ap;
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Error err;
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std::unique_ptr<llvm::Module> module_ap (m_code_generator->ReleaseModule());
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if (!module_ap.get())
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{
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err.SetErrorToGenericError();
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err.SetErrorString("IR doesn't contain a module");
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return err;
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}
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// Find the actual name of the function (it's often mangled somehow)
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ConstString function_name;
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if (!FindFunctionInModule(function_name, module_ap.get(), m_expr.FunctionName()))
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{
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err.SetErrorToGenericError();
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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());
|
|
}
|
|
|
|
m_execution_unit.reset(new IRExecutionUnit(m_llvm_context, // handed off here
|
|
module_ap, // handed off here
|
|
function_name,
|
|
exe_ctx.GetTargetSP(),
|
|
m_compiler->getTargetOpts().Features));
|
|
|
|
ClangExpressionDeclMap *decl_map = m_expr.DeclMap(); // result can be NULL
|
|
|
|
if (decl_map)
|
|
{
|
|
Stream *error_stream = NULL;
|
|
Target *target = exe_ctx.GetTargetPtr();
|
|
if (target)
|
|
error_stream = &target->GetDebugger().GetErrorStream();
|
|
|
|
IRForTarget ir_for_target(decl_map,
|
|
m_expr.NeedsVariableResolution(),
|
|
*m_execution_unit,
|
|
error_stream,
|
|
function_name.AsCString());
|
|
|
|
bool ir_can_run = ir_for_target.runOnModule(*m_execution_unit->GetModule());
|
|
|
|
Error interpret_error;
|
|
|
|
can_interpret = IRInterpreter::CanInterpret(*m_execution_unit->GetModule(), *m_execution_unit->GetFunction(), interpret_error);
|
|
|
|
Process *process = exe_ctx.GetProcessPtr();
|
|
|
|
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(*m_execution_unit->GetModule()))
|
|
{
|
|
err.SetErrorToGenericError();
|
|
err.SetErrorString("Couldn't add dynamic checks to the expression");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
m_execution_unit->GetRunnableInfo(err, func_addr, func_end);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m_execution_unit->GetRunnableInfo(err, func_addr, func_end);
|
|
}
|
|
|
|
execution_unit_ap.reset (m_execution_unit.release());
|
|
|
|
return err;
|
|
}
|