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cfb4eb293f
Because of this, we would previously emit NO path notes when a parameter is constrained to null (because there are no stores). Now we show where we made the assumption, which is much more useful. llvm-svn: 161280
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
//===--- UndefinedArraySubscriptChecker.h ----------------------*- 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 UndefinedArraySubscriptChecker, a builtin check in ExprEngine
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// that performs checks for undefined array subscripts.
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//
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//===----------------------------------------------------------------------===//
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#include "ClangSACheckers.h"
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#include "clang/StaticAnalyzer/Core/Checker.h"
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#include "clang/StaticAnalyzer/Core/CheckerManager.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
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using namespace clang;
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using namespace ento;
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namespace {
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class UndefinedArraySubscriptChecker
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: public Checker< check::PreStmt<ArraySubscriptExpr> > {
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mutable OwningPtr<BugType> BT;
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public:
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void checkPreStmt(const ArraySubscriptExpr *A, CheckerContext &C) const;
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};
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} // end anonymous namespace
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void
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UndefinedArraySubscriptChecker::checkPreStmt(const ArraySubscriptExpr *A,
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CheckerContext &C) const {
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if (C.getState()->getSVal(A->getIdx(), C.getLocationContext()).isUndef()) {
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if (ExplodedNode *N = C.generateSink()) {
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if (!BT)
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BT.reset(new BuiltinBug("Array subscript is undefined"));
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// Generate a report for this bug.
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BugReport *R = new BugReport(*BT, BT->getName(), N);
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R->addRange(A->getIdx()->getSourceRange());
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bugreporter::addTrackNullOrUndefValueVisitor(N, A->getIdx(), R);
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C.EmitReport(R);
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}
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}
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}
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void ento::registerUndefinedArraySubscriptChecker(CheckerManager &mgr) {
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mgr.registerChecker<UndefinedArraySubscriptChecker>();
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}
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