external/bsd/llvm/dist/clang/lib/StaticAnalyzer/Frontend/ModelInjector.cpp

   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
  28 ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {}
  29
  30 Stmt *ModelInjector::getBody(const FunctionDecl *D) {
  31   onBodySynthesis(D);
  32   return Bodies[D->getName()];
  33 }
  34
  35 Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) {
  36   onBodySynthesis(D);
  37   return Bodies[D->getName()];
  38 }
  39
  40 void 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.push_back(FrontendInputFile(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;
  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 }