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