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-//== Checker.h - Abstract interface for checkers -----------------*- C++ -*--=//
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-//
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-// The LLVM Compiler Infrastructure
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-//
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-// This file is distributed under the University of Illinois Open Source
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-// License. See LICENSE.TXT for details.
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-//
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-//===----------------------------------------------------------------------===//
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-//
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-// This file defines Checker and CheckerVisitor, classes used for creating
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-// domain-specific checks.
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-//
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-//===----------------------------------------------------------------------===//
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-
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-#ifndef LLVM_CLANG_GR_CHECKER
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-#define LLVM_CLANG_GR_CHECKER
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-
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-#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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-
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-//===----------------------------------------------------------------------===//
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-// Checker interface.
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-//===----------------------------------------------------------------------===//
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-
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-namespace clang {
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-
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-namespace ento {
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-
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-class Checker {
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-private:
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- friend class ExprEngine;
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-
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- // FIXME: Remove the 'tag' option.
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- void GR_Visit(ExplodedNodeSet &Dst,
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- StmtNodeBuilder &Builder,
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- ExprEngine &Eng,
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- const Stmt *S,
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- ExplodedNode *Pred, void *tag, bool isPrevisit,
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- bool& respondsToCallback) {
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- CheckerContext C(Dst, Builder, Eng, Pred, tag,
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- isPrevisit ? ProgramPoint::PreStmtKind :
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- ProgramPoint::PostStmtKind, &respondsToCallback, S);
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- if (isPrevisit)
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- _PreVisit(C, S);
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- else
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- _PostVisit(C, S);
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- }
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-
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- void GR_visitObjCMessage(ExplodedNodeSet &Dst,
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- StmtNodeBuilder &Builder,
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- ExprEngine &Eng,
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- const ObjCMessage &msg,
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- ExplodedNode *Pred, void *tag, bool isPrevisit) {
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- CheckerContext C(Dst, Builder, Eng, Pred, tag,
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- isPrevisit ? ProgramPoint::PreStmtKind :
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- ProgramPoint::PostStmtKind, 0, msg.getOriginExpr());
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- if (isPrevisit)
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- preVisitObjCMessage(C, msg);
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- else
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- postVisitObjCMessage(C, msg);
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- }
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-
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- bool GR_evalNilReceiver(ExplodedNodeSet &Dst, StmtNodeBuilder &Builder,
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- ExprEngine &Eng, const ObjCMessage &msg,
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- ExplodedNode *Pred, const GRState *state, void *tag) {
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- CheckerContext C(Dst, Builder, Eng, Pred, tag, ProgramPoint::PostStmtKind,
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- 0, msg.getOriginExpr(), state);
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- return evalNilReceiver(C, msg);
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- }
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-
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- bool GR_evalCallExpr(ExplodedNodeSet &Dst, StmtNodeBuilder &Builder,
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- ExprEngine &Eng, const CallExpr *CE,
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- ExplodedNode *Pred, void *tag) {
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- CheckerContext C(Dst, Builder, Eng, Pred, tag, ProgramPoint::PostStmtKind,
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- 0, CE);
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- return evalCallExpr(C, CE);
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- }
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-
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- // FIXME: Remove the 'tag' option.
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- void GR_VisitBind(ExplodedNodeSet &Dst,
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- StmtNodeBuilder &Builder, ExprEngine &Eng,
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- const Stmt *StoreE, ExplodedNode *Pred, void *tag,
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- SVal location, SVal val,
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- bool isPrevisit) {
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- CheckerContext C(Dst, Builder, Eng, Pred, tag,
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- isPrevisit ? ProgramPoint::PreStmtKind :
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- ProgramPoint::PostStmtKind, 0, StoreE);
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- assert(isPrevisit && "Only previsit supported for now.");
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- PreVisitBind(C, StoreE, location, val);
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- }
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-
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- // FIXME: Remove the 'tag' option.
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- void GR_visitLocation(ExplodedNodeSet &Dst,
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- StmtNodeBuilder &Builder,
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- ExprEngine &Eng,
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- const Stmt *S,
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- ExplodedNode *Pred, const GRState *state,
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- SVal location,
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- void *tag, bool isLoad) {
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- CheckerContext C(Dst, Builder, Eng, Pred, tag,
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- isLoad ? ProgramPoint::PreLoadKind :
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- ProgramPoint::PreStoreKind, 0, S, state);
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- visitLocation(C, S, location, isLoad);
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- }
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-
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- void GR_evalDeadSymbols(ExplodedNodeSet &Dst, StmtNodeBuilder &Builder,
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- ExprEngine &Eng, const Stmt *S, ExplodedNode *Pred,
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- SymbolReaper &SymReaper, void *tag) {
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- CheckerContext C(Dst, Builder, Eng, Pred, tag,
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- ProgramPoint::PostPurgeDeadSymbolsKind, 0, S);
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- evalDeadSymbols(C, SymReaper);
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- }
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-
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-public:
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- virtual ~Checker();
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- virtual void _PreVisit(CheckerContext &C, const Stmt *S) {}
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- virtual void _PostVisit(CheckerContext &C, const Stmt *S) {}
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- virtual void preVisitObjCMessage(CheckerContext &C, ObjCMessage msg) {}
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- virtual void postVisitObjCMessage(CheckerContext &C, ObjCMessage msg) {}
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- virtual void visitLocation(CheckerContext &C, const Stmt *S, SVal location,
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- bool isLoad) {}
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- virtual void PreVisitBind(CheckerContext &C, const Stmt *StoreE,
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- SVal location, SVal val) {}
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- virtual void evalDeadSymbols(CheckerContext &C, SymbolReaper &SymReaper) {}
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- virtual void evalEndPath(EndOfFunctionNodeBuilder &B, void *tag,
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- ExprEngine &Eng) {}
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-
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- virtual void MarkLiveSymbols(const GRState *state, SymbolReaper &SymReaper) {}
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-
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- virtual void VisitBranchCondition(BranchNodeBuilder &Builder,
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- ExprEngine &Eng,
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- const Stmt *Condition, void *tag) {}
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-
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- virtual bool evalNilReceiver(CheckerContext &C, ObjCMessage msg) {
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- return false;
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- }
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-
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- virtual bool evalCallExpr(CheckerContext &C, const CallExpr *CE) {
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- return false;
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- }
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-
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- virtual const GRState *evalAssume(const GRState *state, SVal Cond,
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- bool Assumption, bool *respondsToCallback) {
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- *respondsToCallback = false;
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- return state;
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- }
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-
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- virtual bool wantsRegionChangeUpdate(const GRState *state) { return false; }
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-
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- virtual const GRState *EvalRegionChanges(const GRState *state,
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- const MemRegion * const *Begin,
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- const MemRegion * const *End,
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- bool *respondsToCallback) {
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- *respondsToCallback = false;
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- return state;
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- }
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-
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- virtual void VisitEndAnalysis(ExplodedGraph &G, BugReporter &B,
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- ExprEngine &Eng) {}
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-};
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-
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-} // end GR namespace
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-
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-} // end clang namespace
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-
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-#endif
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-
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