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//===--- UndefinedArraySubscriptChecker.h ----------------------*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This defines UndefinedArraySubscriptChecker, a builtin check in ExprEngine
// that performs checks for undefined array subscripts.
//
//===----------------------------------------------------------------------===//
#include "ClangSACheckers.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
using namespace clang;
using namespace ento;
namespace {
class UndefinedArraySubscriptChecker
: public Checker< check::PreStmt<ArraySubscriptExpr> > {
mutable OwningPtr<BugType> BT;
public:
void checkPreStmt(const ArraySubscriptExpr *A, CheckerContext &C) const;
};
} // end anonymous namespace
void
UndefinedArraySubscriptChecker::checkPreStmt(const ArraySubscriptExpr *A,
CheckerContext &C) const {
if (C.getState()->getSVal(A->getIdx(), C.getLocationContext()).isUndef()) {
if (ExplodedNode *N = C.generateSink()) {
if (!BT)
BT.reset(new BuiltinBug("Array subscript is undefined"));
// Generate a report for this bug.
BugReport *R = new BugReport(*BT, BT->getName(), N);
R->addRange(A->getIdx()->getSourceRange());
bugreporter::trackNullOrUndefValue(N, A->getIdx(), *R);
C.emitReport(R);
}
}
}
void ento::registerUndefinedArraySubscriptChecker(CheckerManager &mgr) {
mgr.registerChecker<UndefinedArraySubscriptChecker>();
}