1 //===-- ModelInjector.cpp ---------------------------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "ModelInjector.h" 11 #include "clang/AST/Decl.h" 12 #include "clang/Basic/IdentifierTable.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 <string> 23 #include <utility> 24 25 using namespace clang; 26 using namespace ento; 27 ModelInjector(CompilerInstance & CI)28ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {} 29 getBody(const FunctionDecl * D)30Stmt *ModelInjector::getBody(const FunctionDecl *D) { 31 onBodySynthesis(D); 32 return Bodies[D->getName()]; 33 } 34 getBody(const ObjCMethodDecl * D)35Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) { 36 onBodySynthesis(D); 37 return Bodies[D->getName()]; 38 } 39 onBodySynthesis(const NamedDecl * D)40void ModelInjector::onBodySynthesis(const NamedDecl *D) { 41 42 // FIXME: what about overloads? Declarations can be used as keys but what 43 // about file name index? Mangled names may not be suitable for that either. 44 if (Bodies.count(D->getName()) != 0) 45 return; 46 47 SourceManager &SM = CI.getSourceManager(); 48 FileID mainFileID = SM.getMainFileID(); 49 50 AnalyzerOptionsRef analyzerOpts = CI.getAnalyzerOpts(); 51 llvm::StringRef modelPath = analyzerOpts->Config["model-path"]; 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 IntrusiveRefCntPtr<CompilerInvocation> Invocation( 67 new CompilerInvocation(CI.getInvocation())); 68 69 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts(); 70 InputKind IK = IK_CXX; // FIXME 71 FrontendOpts.Inputs.clear(); 72 FrontendOpts.Inputs.emplace_back(fileName, IK); 73 FrontendOpts.DisableFree = true; 74 75 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0; 76 77 // Modules are parsed by a separate CompilerInstance, so this code mimics that 78 // behavior for models 79 CompilerInstance Instance(CI.getPCHContainerOperations()); 80 Instance.setInvocation(&*Invocation); 81 Instance.createDiagnostics( 82 new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()), 83 /*ShouldOwnClient=*/true); 84 85 Instance.getDiagnostics().setSourceManager(&SM); 86 87 Instance.setVirtualFileSystem(&CI.getVirtualFileSystem()); 88 89 // The instance wants to take ownership, however DisableFree frontend option 90 // is set to true to avoid double free issues 91 Instance.setFileManager(&CI.getFileManager()); 92 Instance.setSourceManager(&SM); 93 Instance.setPreprocessor(&CI.getPreprocessor()); 94 Instance.setASTContext(&CI.getASTContext()); 95 96 Instance.getPreprocessor().InitializeForModelFile(); 97 98 ParseModelFileAction parseModelFile(Bodies); 99 100 const unsigned ThreadStackSize = 8 << 20; 101 llvm::CrashRecoveryContext CRC; 102 103 CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); }, 104 ThreadStackSize); 105 106 Instance.getPreprocessor().FinalizeForModelFile(); 107 108 Instance.resetAndLeakSourceManager(); 109 Instance.resetAndLeakFileManager(); 110 Instance.resetAndLeakPreprocessor(); 111 112 // The preprocessor enters to the main file id when parsing is started, so 113 // the main file id is changed to the model file during parsing and it needs 114 // to be reseted to the former main file id after parsing of the model file 115 // is done. 116 SM.setMainFileID(mainFileID); 117 } 118