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//== Environment.h - Map from Stmt* to Locations/Values ---------*- C++ -*--==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defined the Environment and EnvironmentManager classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_ENVIRONMENT_H
#define LLVM_CLANG_ANALYSIS_ENVIRONMENT_H
// For using typedefs in StoreManager. Should find a better place for these
// typedefs.
#include "clang/Checker/PathSensitive/Store.h"
#include "llvm/ADT/ImmutableMap.h"
#include "llvm/ADT/SmallVector.h"
#include "clang/Checker/PathSensitive/SVals.h"
#include "llvm/Support/Allocator.h"
#include "llvm/ADT/FoldingSet.h"
namespace clang {
class AnalysisContext;
class EnvironmentManager;
class ValueManager;
class LiveVariables;
class Environment {
private:
friend class EnvironmentManager;
// Type definitions.
typedef llvm::ImmutableMap<const Stmt*,SVal> BindingsTy;
// Data.
BindingsTy ExprBindings;
AnalysisContext *ACtx;
Environment(BindingsTy eb, AnalysisContext *aCtx)
: ExprBindings(eb), ACtx(aCtx) {}
public:
typedef BindingsTy::iterator iterator;
iterator begin() const { return ExprBindings.begin(); }
iterator end() const { return ExprBindings.end(); }
SVal LookupExpr(const Stmt* E) const {
const SVal* X = ExprBindings.lookup(E);
return X ? *X : UnknownVal();
}
SVal GetSVal(const Stmt* Ex, ValueManager& ValMgr) const;
AnalysisContext &getAnalysisContext() const { return *ACtx; }
/// Profile - Profile the contents of an Environment object for use
/// in a FoldingSet.
static void Profile(llvm::FoldingSetNodeID& ID, const Environment* E) {
E->ExprBindings.Profile(ID);
}
/// Profile - Used to profile the contents of this object for inclusion
/// in a FoldingSet.
void Profile(llvm::FoldingSetNodeID& ID) const {
Profile(ID, this);
}
bool operator==(const Environment& RHS) const {
return ExprBindings == RHS.ExprBindings;
}
};
class EnvironmentManager {
private:
typedef Environment::BindingsTy::Factory FactoryTy;
FactoryTy F;
public:
EnvironmentManager(llvm::BumpPtrAllocator& Allocator) : F(Allocator) {}
~EnvironmentManager() {}
Environment getInitialEnvironment(AnalysisContext *ACtx) {
return Environment(F.GetEmptyMap(), ACtx);
}
Environment BindExpr(Environment Env, const Stmt *S, SVal V,
bool Invalidate);
Environment RemoveDeadBindings(Environment Env, const Stmt *S,
SymbolReaper &SymReaper, const GRState *ST,
llvm::SmallVectorImpl<const MemRegion*>& RegionRoots);
};
} // end clang namespace
#endif
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