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// CFRefCount.cpp - Transfer functions for tracking simple values -*- C++ -*--
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This files defines the methods for CFRefCount, which implements
// a reference count checker for Core Foundation (Mac OS X).
//
//===----------------------------------------------------------------------===//
#include "CFRefCount.h"
#include "clang/Analysis/PathSensitive/ValueState.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Analysis/LocalCheckers.h"
using namespace clang;
namespace clang {
void CheckCFRefCount(CFG& cfg, FunctionDecl& FD, ASTContext& Ctx,
Diagnostic& Diag) {
if (Diag.hasErrorOccurred())
return;
// FIXME: Refactor some day so this becomes a single function invocation.
GRCoreEngine<GRExprEngine> Engine(cfg, FD, Ctx);
GRExprEngine* CS = &Engine.getCheckerState();
CFRefCount TF;
CS->setTransferFunctions(TF);
Engine.ExecuteWorkList(20000);
}
}
void CFRefCount::EvalCall(ExplodedNodeSet<ValueState>& Dst,
ValueStateManager& StateMgr,
GRStmtNodeBuilder<ValueState>& Builder,
ValueManager& ValMgr,
CallExpr* CE, LVal L,
ExplodedNode<ValueState>* Pred) {
ValueState* St = Pred->getState();
// Invalidate all arguments passed in by reference (LVals).
for (CallExpr::arg_iterator I = CE->arg_begin(), E = CE->arg_end();
I != E; ++I) {
RVal V = StateMgr.GetRVal(St, *I);
if (isa<LVal>(V))
St = StateMgr.SetRVal(St, cast<LVal>(V), UnknownVal());
}
Builder.Nodify(Dst, CE, Pred, St);
}