include/clang/Checker/PathSensitive/GRExprEngineBuilders.h

   1 //===-- GRExprEngineBuilders.h - "Builder" classes for GRExprEngine -*- 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 //  This file defines smart builder "references" which are used to marshal
  11 //  builders between GRExprEngine objects and their related components.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #ifndef LLVM_CLANG_ANALYSIS_GREXPRENGINE_BUILDERS
  16 #define LLVM_CLANG_ANALYSIS_GREXPRENGINE_BUILDERS
  17 #include "clang/Checker/PathSensitive/GRExprEngine.h"
  18 #include "clang/Analysis/Support/SaveAndRestore.h"
  19
  20 namespace clang {
  21
  22 class GRStmtNodeBuilderRef {
  23   ExplodedNodeSet &Dst;
  24   GRStmtNodeBuilder &B;
  25   GRExprEngine& Eng;
  26   ExplodedNode* Pred;
  27   const GRState* state;
  28   const Stmt* stmt;
  29   const unsigned OldSize;
  30   const bool AutoCreateNode;
  31   SaveAndRestore<bool> OldSink;
  32   SaveAndRestore<const void*> OldTag;
  33   SaveOr OldHasGen;
  34
  35 private:
  36   friend class GRExprEngine;
  37
  38   GRStmtNodeBuilderRef(); // do not implement
  39   void operator=(const GRStmtNodeBuilderRef&); // do not implement
  40
  41   GRStmtNodeBuilderRef(ExplodedNodeSet &dst,
  42                        GRStmtNodeBuilder &builder,
  43                        GRExprEngine& eng,
  44                        ExplodedNode* pred,
  45                        const GRState *st,
  46                        const Stmt* s, bool auto_create_node)
  47   : Dst(dst), B(builder), Eng(eng), Pred(pred),
  48     state(st), stmt(s), OldSize(Dst.size()), AutoCreateNode(auto_create_node),
  49     OldSink(B.BuildSinks), OldTag(B.Tag), OldHasGen(B.HasGeneratedNode) {}
  50
  51 public:
  52
  53   ~GRStmtNodeBuilderRef() {
  54     // Handle the case where no nodes where generated.  Auto-generate that
  55     // contains the updated state if we aren't generating sinks.
  56     if (!B.BuildSinks && Dst.size() == OldSize && !B.HasGeneratedNode) {
  57       if (AutoCreateNode)
  58         B.MakeNode(Dst, const_cast<Stmt*>(stmt), Pred, state);
  59       else
  60         Dst.Add(Pred);
  61     }
  62   }
  63
  64   const GRState *getState() { return state; }
  65
  66   GRStateManager& getStateManager() {
  67     return Eng.getStateManager();
  68   }
  69
  70   ExplodedNode* MakeNode(const GRState* state) {
  71     return B.MakeNode(Dst, const_cast<Stmt*>(stmt), Pred, state);
  72   }
  73 };
  74
  75 } // end clang namespace
  76 #endif