base/debug/leak_annotations.h

// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_DEBUG_LEAK_ANNOTATIONS_H_
#define BASE_DEBUG_LEAK_ANNOTATIONS_H_

#include "build/build_config.h"

// This file defines macros which can be used to annotate intentional memory
// leaks. Support for annotations is implemented in 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.
//
// ANNOTATE_SCOPED_MEMORY_LEAK: all allocations made in the current scope
// will be annotated as leaks.
// ANNOTATE_LEAKING_OBJECT_PTR(X): the heap object referenced by pointer X will
// be annotated as a leak.

#if defined(LEAK_SANITIZER) && !BUILDFLAG(IS_NACL)

#include <sanitizer/lsan_interface.h>

class ScopedLeakSanitizerDisabler {
 public:
  ScopedLeakSanitizerDisabler() { __lsan_disable(); }

  ScopedLeakSanitizerDisabler(const ScopedLeakSanitizerDisabler&) = delete;
  ScopedLeakSanitizerDisabler& operator=(const ScopedLeakSanitizerDisabler&) =
      delete;

  ~ScopedLeakSanitizerDisabler() { __lsan_enable(); }
};

#define ANNOTATE_SCOPED_MEMORY_LEAK \
    ScopedLeakSanitizerDisabler leak_sanitizer_disabler; static_cast<void>(0)

#define ANNOTATE_LEAKING_OBJECT_PTR(X) __lsan_ignore_object(X);

#else

#define ANNOTATE_SCOPED_MEMORY_LEAK ((void)0)
#define ANNOTATE_LEAKING_OBJECT_PTR(X) ((void)0)

#endif

#endif  // BASE_DEBUG_LEAK_ANNOTATIONS_H_