222c94f5a4
...where prior to r183883 "Implement core issue 903: only integer literals with value 0 and prvalues of type std::nullptr_t are null pointer constants from C++11 onwards," Expr::isNullPointerConstant with NPC_NeverValueDependent could go into an llvm_unreachable case. Change-Id: I29cf093f18ece4cd83fd759e30f72c2a71f69554
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*
|
|
* This file is part of the LibreOffice project.
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*/
|
|
|
|
#include "plugin.hxx"
|
|
|
|
namespace {
|
|
|
|
class DerefNullPtr:
|
|
public RecursiveASTVisitor<DerefNullPtr>, public loplugin::Plugin
|
|
{
|
|
public:
|
|
explicit DerefNullPtr(InstantiationData const & data): Plugin(data) {}
|
|
|
|
void run() override
|
|
{ TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
|
|
|
|
bool VisitUnaryDeref(UnaryOperator const * op);
|
|
};
|
|
|
|
bool DerefNullPtr::VisitUnaryDeref(UnaryOperator const * op) {
|
|
if (!ignoreLocation(op)
|
|
&& (op->getSubExpr()->IgnoreParenCasts()->isNullPointerConstant(
|
|
compiler.getASTContext(), Expr::NPC_ValueDependentIsNotNull/*TODO*/)
|
|
!= Expr::NPCK_NotNull))
|
|
{
|
|
report(
|
|
DiagnosticsEngine::Warning, "null pointer dereference",
|
|
op->getLocStart())
|
|
<< op->getSourceRange();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
loplugin::Plugin::Registration<DerefNullPtr> X("derefnullptr");
|
|
|
|
}
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|