forked from OSchip/llvm-project
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
//===--- BadCallChecker.h - Bad call checker --------------------*- 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 defines BadCallChecker, a builtin check in GRExprEngine that performs
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// checks for bad callee at call sites.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Analysis/PathSensitive/CheckerVisitor.h"
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#include "clang/Analysis/PathSensitive/BugReporter.h"
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#include "GRExprEngineInternalChecks.h"
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using namespace clang;
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namespace {
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class VISIBILITY_HIDDEN BadCallChecker : public CheckerVisitor<BadCallChecker> {
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BuiltinBug *BT;
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public:
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BadCallChecker() : BT(0) {}
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static void *getTag() {
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static int x = 0;
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return &x;
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}
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void PreVisitCallExpr(CheckerContext &C, const CallExpr *CE);
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};
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} // end anonymous namespace
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void clang::RegisterBadCallChecker(GRExprEngine &Eng) {
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Eng.registerCheck(new BadCallChecker());
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}
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void BadCallChecker::PreVisitCallExpr(CheckerContext &C, const CallExpr *CE) {
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const Expr *Callee = CE->getCallee()->IgnoreParens();
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SVal L = C.getState()->getSVal(Callee);
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if (L.isUndef() || isa<loc::ConcreteInt>(L)) {
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if (ExplodedNode *N = C.GenerateNode(CE, true)) {
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if (!BT)
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BT = new BuiltinBug("Invalid function call",
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"Called function pointer is a null or undefined pointer value");
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EnhancedBugReport *R =
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new EnhancedBugReport(*BT, BT->getDescription().c_str(), N);
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R->addVisitorCreator(bugreporter::registerTrackNullOrUndefValue,
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bugreporter::GetCalleeExpr(N));
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C.EmitReport(R);
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}
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}
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}
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