1//===-- ModelInjector.h -----------------------------------------*- 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/// \file 11/// \brief This file defines the clang::ento::ModelInjector class which implements the 12/// clang::CodeInjector interface. This class is responsible for injecting 13/// function definitions that were synthesized from model files. 14/// 15/// Model files allow definitions of functions to be lazily constituted for functions 16/// which lack bodies in the original source code. This allows the analyzer 17/// to more precisely analyze code that calls such functions, analyzing the 18/// artificial definitions (which typically approximate the semantics of the 19/// called function) when called by client code. These definitions are 20/// reconstituted lazily, on-demand, by the static analyzer engine. 21/// 22//===----------------------------------------------------------------------===// 23 24#ifndef LLVM_CLANG_SA_FRONTEND_MODELINJECTOR_H 25#define LLVM_CLANG_SA_FRONTEND_MODELINJECTOR_H 26 27#include "clang/Analysis/CodeInjector.h" 28#include "llvm/ADT/IntrusiveRefCntPtr.h" 29#include "llvm/ADT/StringMap.h" 30#include <map> 31#include <memory> 32#include <vector> 33 34namespace clang { 35 36class CompilerInstance; 37class ASTUnit; 38class ASTReader; 39class NamedDecl; 40class Module; 41 42namespace ento { 43class ModelInjector : public CodeInjector { 44public: 45 ModelInjector(CompilerInstance &CI); 46 Stmt *getBody(const FunctionDecl *D) override; 47 Stmt *getBody(const ObjCMethodDecl *D) override; 48 49private: 50 /// \brief Synthesize a body for a declaration 51 /// 52 /// This method first looks up the appropriate model file based on the 53 /// model-path configuration option and the name of the declaration that is 54 /// looked up. If no model were synthesized yet for a function with that name 55 /// it will create a new compiler instance to parse the model file using the 56 /// ASTContext, Preprocessor, SourceManager of the original compiler instance. 57 /// The former resources are shared between the two compiler instance, so the 58 /// newly created instance have to "leak" these objects, since they are owned 59 /// by the original instance. 60 /// 61 /// The model-path should be either an absolute path or relative to the 62 /// working directory of the compiler. 63 void onBodySynthesis(const NamedDecl *D); 64 65 CompilerInstance &CI; 66 67 // FIXME: double memoization is redundant, with memoization both here and in 68 // BodyFarm. 69 llvm::StringMap<Stmt *> Bodies; 70}; 71} 72} 73 74#endif 75