clang  8.0.0svn
ModelInjector.cpp
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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"
13 #include "clang/Basic/Stack.h"
14 #include "clang/Frontend/ASTUnit.h"
17 #include "clang/Lex/Preprocessor.h"
20 #include "llvm/ADT/STLExtras.h"
21 #include "llvm/Support/CrashRecoveryContext.h"
22 #include "llvm/Support/FileSystem.h"
23 #include <utility>
24 
25 using namespace clang;
26 using namespace ento;
27 
29 
31  onBodySynthesis(D);
32  return Bodies[D->getName()];
33 }
34 
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 
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  auto Invocation = std::make_shared<CompilerInvocation>(CI.getInvocation());
67 
68  FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
69  InputKind IK = InputKind::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
79  Instance.setInvocation(std::move(Invocation));
80  Instance.createDiagnostics(
82  /*ShouldOwnClient=*/true);
83 
84  Instance.getDiagnostics().setSourceManager(&SM);
85 
86  Instance.setVirtualFileSystem(&CI.getVirtualFileSystem());
87 
88  // The instance wants to take ownership, however DisableFree frontend option
89  // is set to true to avoid double free issues
90  Instance.setFileManager(&CI.getFileManager());
91  Instance.setSourceManager(&SM);
92  Instance.setPreprocessor(CI.getPreprocessorPtr());
93  Instance.setASTContext(&CI.getASTContext());
94 
95  Instance.getPreprocessor().InitializeForModelFile();
96 
97  ParseModelFileAction parseModelFile(Bodies);
98 
99  llvm::CrashRecoveryContext CRC;
100 
101  CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); },
103 
104  Instance.getPreprocessor().FinalizeForModelFile();
105 
106  Instance.resetAndLeakSourceManager();
107  Instance.resetAndLeakFileManager();
108  Instance.resetAndLeakPreprocessor();
109 
110  // The preprocessor enters to the main file id when parsing is started, so
111  // the main file id is changed to the model file during parsing and it needs
112  // to be reset to the former main file id after parsing of the model file
113  // is done.
114  SM.setMainFileID(mainFileID);
115 }
Represents a function declaration or definition.
Definition: Decl.h:1717
CompilerInvocation & getInvocation()
Stmt - This represents one statement.
Definition: Stmt.h:66
std::shared_ptr< PCHContainerOperations > getPCHContainerOperations() const
ASTContext & getASTContext() const
ObjCMethodDecl - Represents an instance or class method declaration.
Definition: DeclObjC.h:139
void setMainFileID(FileID FID)
Set the file ID for the main source file.
std::shared_ptr< Preprocessor > getPreprocessorPtr()
AnalyzerOptionsRef getAnalyzerOpts()
Frontend action to parse model files.
Defines the clang::Preprocessor interface.
This file defines the clang::ento::ModelInjector class which implements the clang::CodeInjector inter...
Defines the clang::IdentifierInfo, clang::IdentifierTable, and clang::Selector interfaces.
const SourceManager & SM
Definition: Format.cpp:1472
CompilerInstance - Helper class for managing a single instance of the Clang compiler.
The kind of a file that we&#39;ve been handed as an input.
Diagnostic consumer that forwards diagnostics along to an existing, already-initialized diagnostic co...
Definition: Diagnostic.h:1554
constexpr size_t DesiredStackSize
The amount of stack space that Clang would like to be provided with.
Definition: Stack.h:24
An opaque identifier used by SourceManager which refers to a source file (MemoryBuffer) along with it...
Dataflow Directional Tag Classes.
FileManager & getFileManager() const
Return the current file manager to the caller.
FileID getMainFileID() const
Returns the FileID of the main source file.
vfs::FileSystem & getVirtualFileSystem() const
SourceManager & getSourceManager() const
Return the current source manager.
FrontendOptions - Options for controlling the behavior of the frontend.
void setInvocation(std::shared_ptr< CompilerInvocation > Value)
setInvocation - Replace the current invocation.
DiagnosticConsumer & getDiagnosticClient() const
StringRef getName() const
Get the name of identifier for this declaration as a StringRef.
Definition: Decl.h:275
Defines the clang::FrontendAction interface and various convenience abstract classes (clang::ASTFront...
Defines utilities for dealing with stack allocation and stack space.
Stmt * getBody(const FunctionDecl *D) override
This represents a decl that may have a name.
Definition: Decl.h:248
This class handles loading and caching of source files into memory.
ModelInjector(CompilerInstance &CI)