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//=== AnalysisContext.h - Analysis context for Path Sens analysis --*- 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 AnalysisContext, a class that manages the analysis context
// data for path sensitive analysis.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_ANALYSIS_ANALYSISCONTEXT_H
#define LLVM_CLANG_ANALYSIS_ANALYSISCONTEXT_H
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/DenseMap.h"
namespace clang {
class Decl;
class Stmt;
class CFG;
class LiveVariables;
class ParentMap;
class ImplicitParamDecl;
/// AnalysisContext contains the context data for the function or method under
/// analysis.
class AnalysisContext {
const Decl *D;
// AnalysisContext owns the following data.
CFG *cfg;
LiveVariables *liveness;
ParentMap *PM;
public:
AnalysisContext(const Decl *d) : D(d), cfg(0), liveness(0), PM(0) {}
~AnalysisContext();
const Decl *getDecl() { return D; }
Stmt *getBody();
CFG *getCFG();
ParentMap &getParentMap();
LiveVariables *getLiveVariables();
/// Return the ImplicitParamDecl* associated with 'self' if this
/// AnalysisContext wraps an ObjCMethodDecl. Returns NULL otherwise.
const ImplicitParamDecl *getSelfDecl() const;
};
class AnalysisContextManager {
typedef llvm::DenseMap<const Decl*, AnalysisContext*> ContextMap;
ContextMap Contexts;
public:
~AnalysisContextManager();
AnalysisContext *getContext(const Decl *D);
// Discard all previously created AnalysisContexts.
void clear();
};
class LocationContext : public llvm::FoldingSetNode {
public:
enum ContextKind { StackFrame, Scope };
private:
ContextKind Kind;
AnalysisContext *Ctx;
const LocationContext *Parent;
protected:
LocationContext(ContextKind k, AnalysisContext *ctx,
const LocationContext *parent)
: Kind(k), Ctx(ctx), Parent(parent) {}
public:
virtual ~LocationContext() {}
ContextKind getKind() const { return Kind; }
AnalysisContext *getAnalysisContext() const { return Ctx; }
const LocationContext *getParent() const { return Parent; }
const Decl *getDecl() const { return getAnalysisContext()->getDecl(); }
CFG *getCFG() const { return getAnalysisContext()->getCFG(); }
LiveVariables *getLiveVariables() const {
return getAnalysisContext()->getLiveVariables();
}
ParentMap &getParentMap() const {
return getAnalysisContext()->getParentMap();
}
const ImplicitParamDecl *getSelfDecl() const {
return Ctx->getSelfDecl();
}
virtual void Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, Kind, Ctx, Parent);
}
static void Profile(llvm::FoldingSetNodeID &ID, ContextKind k,
AnalysisContext *ctx, const LocationContext *parent);
static bool classof(const LocationContext*) { return true; }
};
class StackFrameContext : public LocationContext {
const Stmt *CallSite;
public:
StackFrameContext(AnalysisContext *ctx, const LocationContext *parent,
const Stmt *s)
: LocationContext(StackFrame, ctx, parent), CallSite(s) {}
virtual ~StackFrameContext() {}
Stmt const *getCallSite() const { return CallSite; }
virtual void Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getAnalysisContext(), getParent(), CallSite);
}
static void Profile(llvm::FoldingSetNodeID &ID, AnalysisContext *ctx,
const LocationContext *parent, const Stmt *s);
static bool classof(const LocationContext* Ctx) {
return Ctx->getKind() == StackFrame;
}
};
class ScopeContext : public LocationContext {
const Stmt *Enter;
public:
ScopeContext(AnalysisContext *ctx, const LocationContext *parent,
const Stmt *s)
: LocationContext(Scope, ctx, parent), Enter(s) {}
virtual ~ScopeContext() {}
virtual void Profile(llvm::FoldingSetNodeID &ID) {
Profile(ID, getAnalysisContext(), getParent(), Enter);
}
static void Profile(llvm::FoldingSetNodeID &ID, AnalysisContext *ctx,
const LocationContext *parent, const Stmt *s);
static bool classof(const LocationContext* Ctx) {
return Ctx->getKind() == Scope;
}
};
class LocationContextManager {
llvm::FoldingSet<LocationContext> Contexts;
public:
~LocationContextManager();
StackFrameContext *getStackFrame(AnalysisContext *ctx,
const LocationContext *parent,
const Stmt *s);
ScopeContext *getScope(AnalysisContext *ctx, const LocationContext *parent,
const Stmt *s);
/// Discard all previously created LocationContext objects.
void clear();
};
} // end clang namespace
#endif
|
