forked from OSchip/llvm-project
96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
//===-- InvalidatedIteratorChecker.cpp ----------------------------*- C++ -*--//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Defines a checker for access of invalidated iterators.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
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#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
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#include "clang/StaticAnalyzer/Core/Checker.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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#include "Iterator.h"
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using namespace clang;
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using namespace ento;
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using namespace iterator;
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namespace {
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class InvalidatedIteratorChecker
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: public Checker<check::PreCall> {
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std::unique_ptr<BugType> InvalidatedBugType;
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void verifyAccess(CheckerContext &C, const SVal &Val) const;
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void reportBug(const StringRef &Message, const SVal &Val,
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CheckerContext &C, ExplodedNode *ErrNode) const;
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public:
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InvalidatedIteratorChecker();
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void checkPreCall(const CallEvent &Call, CheckerContext &C) const;
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};
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} //namespace
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InvalidatedIteratorChecker::InvalidatedIteratorChecker() {
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InvalidatedBugType.reset(
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new BugType(this, "Iterator invalidated", "Misuse of STL APIs"));
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}
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void InvalidatedIteratorChecker::checkPreCall(const CallEvent &Call,
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CheckerContext &C) const {
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// Check for access of invalidated position
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const auto *Func = dyn_cast_or_null<FunctionDecl>(Call.getDecl());
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if (!Func)
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return;
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if (Func->isOverloadedOperator() &&
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isAccessOperator(Func->getOverloadedOperator())) {
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// Check for any kind of access of invalidated iterator positions
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if (const auto *InstCall = dyn_cast<CXXInstanceCall>(&Call)) {
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verifyAccess(C, InstCall->getCXXThisVal());
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} else {
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verifyAccess(C, Call.getArgSVal(0));
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}
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}
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}
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void InvalidatedIteratorChecker::verifyAccess(CheckerContext &C, const SVal &Val) const {
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auto State = C.getState();
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const auto *Pos = getIteratorPosition(State, Val);
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if (Pos && !Pos->isValid()) {
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auto *N = C.generateErrorNode(State);
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if (!N) {
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return;
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}
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reportBug("Invalidated iterator accessed.", Val, C, N);
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}
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}
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void InvalidatedIteratorChecker::reportBug(const StringRef &Message,
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const SVal &Val, CheckerContext &C,
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ExplodedNode *ErrNode) const {
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auto R = std::make_unique<PathSensitiveBugReport>(*InvalidatedBugType,
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Message, ErrNode);
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R->markInteresting(Val);
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C.emitReport(std::move(R));
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}
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void ento::registerInvalidatedIteratorChecker(CheckerManager &mgr) {
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mgr.registerChecker<InvalidatedIteratorChecker>();
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}
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bool ento::shouldRegisterInvalidatedIteratorChecker(const LangOptions &LO) {
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return true;
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}
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