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//===--- CallInliner.cpp - Transfer function that inlines callee ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the callee inlining transfer function.
//
//===----------------------------------------------------------------------===//
#include "clang/Checker/PathSensitive/CheckerVisitor.h"
#include "clang/Checker/PathSensitive/GRState.h"
#include "clang/Checker/Checkers/LocalCheckers.h"
using namespace clang;
namespace {
class CallInliner : public Checker {
public:
static void *getTag() {
static int x;
return &x;
}
virtual bool EvalCallExpr(CheckerContext &C, const CallExpr *CE);
virtual void EvalEndPath(GREndPathNodeBuilder &B,void *tag,GRExprEngine &Eng);
};
}
void clang::RegisterCallInliner(GRExprEngine &Eng) {
Eng.registerCheck(new CallInliner());
}
bool CallInliner::EvalCallExpr(CheckerContext &C, const CallExpr *CE) {
const GRState *state = C.getState();
const Expr *Callee = CE->getCallee();
SVal L = state->getSVal(Callee);
const FunctionDecl *FD = L.getAsFunctionDecl();
if (!FD)
return false;
if (!FD->isThisDeclarationADefinition())
return false;
// Now we have the definition of the callee, create a CallEnter node.
CallEnter Loc(CE, FD, C.getPredecessor()->getLocationContext());
C.addTransition(state, Loc);
return true;
}
void CallInliner::EvalEndPath(GREndPathNodeBuilder &B, void *tag,
GRExprEngine &Eng) {
const GRState *state = B.getState();
ExplodedNode *Pred = B.getPredecessor();
const StackFrameContext *LocCtx =
cast<StackFrameContext>(Pred->getLocationContext());
// Check if this is the top level stack frame.
if (!LocCtx->getParent())
return;
const StackFrameContext *ParentSF =
cast<StackFrameContext>(LocCtx->getParent());
SymbolReaper SymReaper(*ParentSF->getLiveVariables(), Eng.getSymbolManager(),
ParentSF);
const Stmt *CE = LocCtx->getCallSite();
// FIXME: move this logic to GRExprEngine::ProcessCallExit().
state = Eng.getStateManager().RemoveDeadBindings(state, const_cast<Stmt*>(CE),
SymReaper);
B.GenerateCallExitNode(state);
}
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