/*
* Copyright (C) 2013 Google Inc. All rights reserved.
* Copyright (C) 2013 Samsung Electronics. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
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* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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*/
#ifndef WTF_LeakAnnotations_h
#define WTF_LeakAnnotations_h
// This file defines macros which can be used to annotate intentional memory
// leaks. Support for annotations is implemented in HeapChecker and
// LeakSanitizer. Annotated objects will be treated as a source of live
// pointers, i.e. any heap objects reachable by following pointers from an
// annotated object will not be reported as leaks.
//
// WTF_ANNOTATE_SCOPED_MEMORY_LEAK: all allocations made in the current scope
// will be annotated as leaks.
// WTF_ANNOTATE_LEAKING_OBJECT_PTR(X): the heap object referenced by pointer X
// will be annotated as a leak.
//
// Note that HeapChecker will report a fatal error if an object which has been
// annotated with ANNOTATE_LEAKING_OBJECT_PTR is later deleted (but
// LeakSanitizer won't).
#include "wtf/Noncopyable.h"
namespace WTF {
#if USE(LEAK_SANITIZER)
extern "C" {
void __lsan_disable();
void __lsan_enable();
void __lsan_ignore_object(const void *p);
} // extern "C"
class LeakSanitizerDisabler {
WTF_MAKE_NONCOPYABLE(LeakSanitizerDisabler);
public:
LeakSanitizerDisabler()
{
__lsan_disable();
}
~LeakSanitizerDisabler()
{
__lsan_enable();
}
};
#define WTF_ANNOTATE_SCOPED_MEMORY_LEAK \
WTF::LeakSanitizerDisabler leakSanitizerDisabler; static_cast<void>(0)
#define WTF_ANNOTATE_LEAKING_OBJECT_PTR(X) \
WTF::__lsan_ignore_object(X)
#else // USE(LEAK_SANITIZER)
// If Leak Sanitizer is not being used, the annotations should be no-ops.
#define WTF_ANNOTATE_SCOPED_MEMORY_LEAK
#define WTF_ANNOTATE_LEAKING_OBJECT_PTR(X)
#endif // USE(LEAK_SANITIZER)
} // namespace WTF
#endif // WTF_LeakAnnotations_h