61 lines
2.6 KiB
C++
61 lines
2.6 KiB
C++
// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
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// Copyright (c) 2014, gperftools Contributors
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef EMERGENCY_MALLOC_H
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#define EMERGENCY_MALLOC_H
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#include "config.h"
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#include <stddef.h>
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#include "base/basictypes.h"
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#include "common.h"
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namespace tcmalloc {
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static const uintptr_t kEmergencyArenaShift = 20+4; // 16 megs
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static const uintptr_t kEmergencyArenaSize = 1 << kEmergencyArenaShift;
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extern __attribute__ ((visibility("internal"))) char *emergency_arena_start;
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extern __attribute__ ((visibility("internal"))) uintptr_t emergency_arena_start_shifted;;
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PERFTOOLS_DLL_DECL void *EmergencyMalloc(size_t size);
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PERFTOOLS_DLL_DECL void EmergencyFree(void *p);
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PERFTOOLS_DLL_DECL void *EmergencyCalloc(size_t n, size_t elem_size);
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PERFTOOLS_DLL_DECL void *EmergencyRealloc(void *old_ptr, size_t new_size);
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static inline bool IsEmergencyPtr(const void *_ptr) {
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uintptr_t ptr = reinterpret_cast<uintptr_t>(_ptr);
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return PREDICT_FALSE((ptr >> kEmergencyArenaShift) == emergency_arena_start_shifted)
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&& emergency_arena_start_shifted;
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}
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} // namespace tcmalloc
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#endif
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