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//== CheckerContext.h - Context info for path-sensitive checkers--*- C++ -*--=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines CheckerContext that provides contextual info for
// path-sensitive checkers.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_SA_CORE_PATHSENSITIVE_CHECKERCONTEXT
#define LLVM_CLANG_SA_CORE_PATHSENSITIVE_CHECKERCONTEXT
#include "clang/Analysis/Support/SaveAndRestore.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
namespace clang {
namespace ento {
class CheckerContext {
ExplodedNodeSet &Dst;
StmtNodeBuilder &B;
ExprEngine &Eng;
ExplodedNode *Pred;
SaveAndRestore<bool> OldSink;
const void *checkerTag;
SaveAndRestore<ProgramPoint::Kind> OldPointKind;
SaveOr OldHasGen;
const GRState *ST;
const Stmt *statement;
const unsigned size;
public:
bool *respondsToCallback;
public:
CheckerContext(ExplodedNodeSet &dst, StmtNodeBuilder &builder,
ExprEngine &eng, ExplodedNode *pred,
const void *tag, ProgramPoint::Kind K,
bool *respondsToCB = 0,
const Stmt *stmt = 0, const GRState *st = 0)
: Dst(dst), B(builder), Eng(eng), Pred(pred),
OldSink(B.BuildSinks),
checkerTag(tag),
OldPointKind(B.PointKind, K),
OldHasGen(B.hasGeneratedNode),
ST(st), statement(stmt), size(Dst.size()),
respondsToCallback(respondsToCB) {}
~CheckerContext();
ExprEngine &getEngine() {
return Eng;
}
AnalysisManager &getAnalysisManager() {
return Eng.getAnalysisManager();
}
ConstraintManager &getConstraintManager() {
return Eng.getConstraintManager();
}
StoreManager &getStoreManager() {
return Eng.getStoreManager();
}
ExplodedNodeSet &getNodeSet() { return Dst; }
StmtNodeBuilder &getNodeBuilder() { return B; }
ExplodedNode *&getPredecessor() { return Pred; }
const GRState *getState() { return ST ? ST : B.GetState(Pred); }
const Stmt *getStmt() const { return statement; }
ASTContext &getASTContext() {
return Eng.getContext();
}
BugReporter &getBugReporter() {
return Eng.getBugReporter();
}
SourceManager &getSourceManager() {
return getBugReporter().getSourceManager();
}
SValBuilder &getSValBuilder() {
return Eng.getSValBuilder();
}
ExplodedNode *generateNode(bool autoTransition = true) {
assert(statement && "Only transitions with statements currently supported");
ExplodedNode *N = generateNodeImpl(statement, getState(), false,
checkerTag);
if (N && autoTransition)
Dst.Add(N);
return N;
}
ExplodedNode *generateNode(const Stmt *stmt, const GRState *state,
bool autoTransition = true, const void *tag = 0) {
assert(state);
ExplodedNode *N = generateNodeImpl(stmt, state, false,
tag ? tag : checkerTag);
if (N && autoTransition)
addTransition(N);
return N;
}
ExplodedNode *generateNode(const GRState *state, ExplodedNode *pred,
bool autoTransition = true) {
assert(statement && "Only transitions with statements currently supported");
ExplodedNode *N = generateNodeImpl(statement, state, pred, false);
if (N && autoTransition)
addTransition(N);
return N;
}
ExplodedNode *generateNode(const GRState *state, bool autoTransition = true,
const void *tag = 0) {
assert(statement && "Only transitions with statements currently supported");
ExplodedNode *N = generateNodeImpl(statement, state, false,
tag ? tag : checkerTag);
if (N && autoTransition)
addTransition(N);
return N;
}
ExplodedNode *generateSink(const Stmt *stmt, const GRState *state = 0) {
return generateNodeImpl(stmt, state ? state : getState(), true,
checkerTag);
}
ExplodedNode *generateSink(const GRState *state = 0) {
assert(statement && "Only transitions with statements currently supported");
return generateNodeImpl(statement, state ? state : getState(), true,
checkerTag);
}
void addTransition(ExplodedNode *node) {
Dst.Add(node);
}
void addTransition(const GRState *state, const void *tag = 0) {
assert(state);
// If the 'state' is not new, we need to check if the cached state 'ST'
// is new.
if (state != getState() || (ST && ST != B.GetState(Pred)))
// state is new or equals to ST.
generateNode(state, true, tag);
else
Dst.Add(Pred);
}
void EmitReport(BugReport *R) {
Eng.getBugReporter().EmitReport(R);
}
AnalysisContext *getCurrentAnalysisContext() const {
return Pred->getLocationContext()->getAnalysisContext();
}
private:
ExplodedNode *generateNodeImpl(const Stmt* stmt, const GRState *state,
bool markAsSink, const void *tag) {
ExplodedNode *node = B.generateNode(stmt, state, Pred, tag);
if (markAsSink && node)
node->markAsSink();
return node;
}
ExplodedNode *generateNodeImpl(const Stmt* stmt, const GRState *state,
ExplodedNode *pred, bool markAsSink) {
ExplodedNode *node = B.generateNode(stmt, state, pred, checkerTag);
if (markAsSink && node)
node->markAsSink();
return node;
}
};
} // end GR namespace
} // end clang namespace
#endif
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