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/LangStandard.h" 13 #include "clang/Basic/Stack.h" 14 #include "clang/AST/DeclObjC.h" 15 #include "clang/Frontend/ASTUnit.h" 16 #include "clang/Frontend/CompilerInstance.h" 17 #include "clang/Frontend/FrontendAction.h" 18 #include "clang/Lex/Preprocessor.h" 19 #include "clang/Serialization/ASTReader.h" 20 #include "clang/StaticAnalyzer/Frontend/FrontendActions.h" 21 #include "llvm/ADT/STLExtras.h" 22 #include "llvm/Support/CrashRecoveryContext.h" 23 #include "llvm/Support/FileSystem.h" 24 #include <utility> 25 26 using namespace clang; 27 using namespace ento; 28 29 ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {} 30 31 Stmt *ModelInjector::getBody(const FunctionDecl *D) { 32 onBodySynthesis(D); 33 return Bodies[D->getName()]; 34 } 35 36 Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) { 37 onBodySynthesis(D); 38 return Bodies[D->getName()]; 39 } 40 41 void ModelInjector::onBodySynthesis(const NamedDecl *D) { 42 43 // FIXME: what about overloads? Declarations can be used as keys but what 44 // about file name index? Mangled names may not be suitable for that either. 45 if (Bodies.count(D->getName()) != 0) 46 return; 47 48 SourceManager &SM = CI.getSourceManager(); 49 FileID mainFileID = SM.getMainFileID(); 50 51 llvm::StringRef modelPath = CI.getAnalyzerOpts().ModelPath; 52 53 llvm::SmallString<128> fileName; 54 55 if (!modelPath.empty()) 56 fileName = 57 llvm::StringRef(modelPath.str() + "/" + D->getName().str() + ".model"); 58 else 59 fileName = llvm::StringRef(D->getName().str() + ".model"); 60 61 if (!llvm::sys::fs::exists(fileName.str())) { 62 Bodies[D->getName()] = nullptr; 63 return; 64 } 65 66 auto Invocation = std::make_shared<CompilerInvocation>(CI.getInvocation()); 67 68 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts(); 69 InputKind IK = Language::CXX; // FIXME 70 FrontendOpts.Inputs.clear(); 71 FrontendOpts.Inputs.emplace_back(fileName, IK); 72 FrontendOpts.DisableFree = true; 73 74 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0; 75 76 // Modules are parsed by a separate CompilerInstance, so this code mimics that 77 // behavior for models 78 CompilerInstance Instance(CI.getPCHContainerOperations()); 79 Instance.setInvocation(std::move(Invocation)); 80 Instance.createDiagnostics( 81 new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()), 82 /*ShouldOwnClient=*/true); 83 84 Instance.getDiagnostics().setSourceManager(&SM); 85 86 // The instance wants to take ownership, however DisableFree frontend option 87 // is set to true to avoid double free issues 88 Instance.setFileManager(&CI.getFileManager()); 89 Instance.setSourceManager(&SM); 90 Instance.setPreprocessor(CI.getPreprocessorPtr()); 91 Instance.setASTContext(&CI.getASTContext()); 92 93 Instance.getPreprocessor().InitializeForModelFile(); 94 95 ParseModelFileAction parseModelFile(Bodies); 96 97 llvm::CrashRecoveryContext CRC; 98 99 CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); }, 100 DesiredStackSize); 101 102 Instance.getPreprocessor().FinalizeForModelFile(); 103 104 Instance.resetAndLeakSourceManager(); 105 Instance.resetAndLeakFileManager(); 106 Instance.resetAndLeakPreprocessor(); 107 108 // The preprocessor enters to the main file id when parsing is started, so 109 // the main file id is changed to the model file during parsing and it needs 110 // to be reset to the former main file id after parsing of the model file 111 // is done. 112 SM.setMainFileID(mainFileID); 113 } 114