1 //== SubEngine.h - Interface of the subengine of CoreEngine --------*- C++ -*-//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the interface of a subengine of the CoreEngine.
12 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_CLANG_GR_SUBENGINE_H
14 #define LLVM_CLANG_GR_SUBENGINE_H
16 #include "clang/Analysis/ProgramPoint.h"
17 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
18 #include "clang/StaticAnalyzer/Core/PathSensitive/Store.h"
24 class LocationContext;
29 struct NodeBuilderContext;
30 class AnalysisManager;
31 class ExplodedNodeSet;
34 class ProgramStateManager;
36 class BranchNodeBuilder;
37 class IndirectGotoNodeBuilder;
38 class SwitchNodeBuilder;
39 class EndOfFunctionNodeBuilder;
40 class NodeBuilderWithSinks;
44 virtual void anchor();
46 virtual ~SubEngine() {}
48 virtual const ProgramState *getInitialState(const LocationContext *InitLoc) = 0;
50 virtual AnalysisManager &getAnalysisManager() = 0;
52 virtual ProgramStateManager &getStateManager() = 0;
54 /// Called by CoreEngine. Used to generate new successor
55 /// nodes by processing the 'effects' of a block-level statement.
56 virtual void processCFGElement(const CFGElement E, ExplodedNode* Pred,
57 unsigned StmtIdx, NodeBuilderContext *Ctx)=0;
59 /// Called by CoreEngine when it starts processing a CFGBlock. The
60 /// SubEngine is expected to populate dstNodes with new nodes representing
61 /// updated analysis state, or generate no nodes at all if it doesn't.
62 virtual void processCFGBlockEntrance(NodeBuilderWithSinks &nodeBuilder) = 0;
64 /// Called by CoreEngine. Used to generate successor
65 /// nodes by processing the 'effects' of a branch condition.
66 virtual void processBranch(const Stmt *Condition, const Stmt *Term,
67 NodeBuilderContext& BuilderCtx,
71 const CFGBlock *DstF) = 0;
73 /// Called by CoreEngine. Used to generate successor
74 /// nodes by processing the 'effects' of a computed goto jump.
75 virtual void processIndirectGoto(IndirectGotoNodeBuilder& builder) = 0;
77 /// Called by CoreEngine. Used to generate successor
78 /// nodes by processing the 'effects' of a switch statement.
79 virtual void processSwitch(SwitchNodeBuilder& builder) = 0;
81 /// Called by CoreEngine. Used to generate end-of-path
82 /// nodes when the control reaches the end of a function.
83 virtual void processEndOfFunction(NodeBuilderContext& BC) = 0;
85 // Generate the entry node of the callee.
86 virtual void processCallEnter(CallEnter CE, ExplodedNode *Pred) = 0;
88 // Generate the first post callsite node.
89 virtual void processCallExit(ExplodedNode *Pred) = 0;
91 /// Called by ConstraintManager. Used to call checker-specific
92 /// logic for handling assumptions on symbolic values.
93 virtual const ProgramState *processAssume(const ProgramState *state,
94 SVal cond, bool assumption) = 0;
96 /// wantsRegionChangeUpdate - Called by ProgramStateManager to determine if a
97 /// region change should trigger a processRegionChanges update.
98 virtual bool wantsRegionChangeUpdate(const ProgramState *state) = 0;
100 /// processRegionChanges - Called by ProgramStateManager whenever a change is made
101 /// to the store. Used to update checkers that track region values.
102 virtual const ProgramState *
103 processRegionChanges(const ProgramState *state,
104 const StoreManager::InvalidatedSymbols *invalidated,
105 ArrayRef<const MemRegion *> ExplicitRegions,
106 ArrayRef<const MemRegion *> Regions) = 0;
109 inline const ProgramState *
110 processRegionChange(const ProgramState *state,
111 const MemRegion* MR) {
112 return processRegionChanges(state, 0, MR, MR);
115 /// printState - Called by ProgramStateManager to print checker-specific data.
116 virtual void printState(raw_ostream &Out, const ProgramState *State,
117 const char *NL, const char *Sep) = 0;
119 /// Called by CoreEngine when the analysis worklist is either empty or the
120 // maximum number of analysis steps have been reached.
121 virtual void processEndWorklist(bool hasWorkRemaining) = 0;
124 } // end GR namespace
126 } // end clang namespace