1 //===-- ModelInjector.cpp ---------------------------------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "ModelInjector.h" 10 #include "clang/AST/Decl.h" 11 #include "clang/Basic/IdentifierTable.h" 12 #include "clang/Basic/Stack.h" 13 #include "clang/Frontend/ASTUnit.h" 14 #include "clang/Frontend/CompilerInstance.h" 15 #include "clang/Frontend/FrontendAction.h" 16 #include "clang/Lex/Preprocessor.h" 17 #include "clang/Serialization/ASTReader.h" 18 #include "clang/StaticAnalyzer/Frontend/FrontendActions.h" 19 #include "llvm/ADT/STLExtras.h" 20 #include "llvm/Support/CrashRecoveryContext.h" 21 #include "llvm/Support/FileSystem.h" 22 #include <utility> 23 24 using namespace clang; 25 using namespace ento; 26 27 ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {} 28 29 Stmt *ModelInjector::getBody(const FunctionDecl *D) { 30 onBodySynthesis(D); 31 return Bodies[D->getName()]; 32 } 33 34 Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) { 35 onBodySynthesis(D); 36 return Bodies[D->getName()]; 37 } 38 39 void ModelInjector::onBodySynthesis(const NamedDecl *D) { 40 41 // FIXME: what about overloads? Declarations can be used as keys but what 42 // about file name index? Mangled names may not be suitable for that either. 43 if (Bodies.count(D->getName()) != 0) 44 return; 45 46 SourceManager &SM = CI.getSourceManager(); 47 FileID mainFileID = SM.getMainFileID(); 48 49 AnalyzerOptionsRef analyzerOpts = CI.getAnalyzerOpts(); 50 llvm::StringRef modelPath = analyzerOpts->ModelPath; 51 52 llvm::SmallString<128> fileName; 53 54 if (!modelPath.empty()) 55 fileName = 56 llvm::StringRef(modelPath.str() + "/" + D->getName().str() + ".model"); 57 else 58 fileName = llvm::StringRef(D->getName().str() + ".model"); 59 60 if (!llvm::sys::fs::exists(fileName.str())) { 61 Bodies[D->getName()] = nullptr; 62 return; 63 } 64 65 auto Invocation = std::make_shared<CompilerInvocation>(CI.getInvocation()); 66 67 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts(); 68 InputKind IK = InputKind::CXX; // FIXME 69 FrontendOpts.Inputs.clear(); 70 FrontendOpts.Inputs.emplace_back(fileName, IK); 71 FrontendOpts.DisableFree = true; 72 73 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0; 74 75 // Modules are parsed by a separate CompilerInstance, so this code mimics that 76 // behavior for models 77 CompilerInstance Instance(CI.getPCHContainerOperations()); 78 Instance.setInvocation(std::move(Invocation)); 79 Instance.createDiagnostics( 80 new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()), 81 /*ShouldOwnClient=*/true); 82 83 Instance.getDiagnostics().setSourceManager(&SM); 84 85 // The instance wants to take ownership, however DisableFree frontend option 86 // is set to true to avoid double free issues 87 Instance.setFileManager(&CI.getFileManager()); 88 Instance.setSourceManager(&SM); 89 Instance.setPreprocessor(CI.getPreprocessorPtr()); 90 Instance.setASTContext(&CI.getASTContext()); 91 92 Instance.getPreprocessor().InitializeForModelFile(); 93 94 ParseModelFileAction parseModelFile(Bodies); 95 96 llvm::CrashRecoveryContext CRC; 97 98 CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); }, 99 DesiredStackSize); 100 101 Instance.getPreprocessor().FinalizeForModelFile(); 102 103 Instance.resetAndLeakSourceManager(); 104 Instance.resetAndLeakFileManager(); 105 Instance.resetAndLeakPreprocessor(); 106 107 // The preprocessor enters to the main file id when parsing is started, so 108 // the main file id is changed to the model file during parsing and it needs 109 // to be reset to the former main file id after parsing of the model file 110 // is done. 111 SM.setMainFileID(mainFileID); 112 } 113