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- // -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
- // Copyright (c) 2014, gperftools Contributors
- // 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.
- // * Neither the name of Google Inc. nor the names of its
- // 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
- // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- #ifndef EMERGENCY_MALLOC_H
- #define EMERGENCY_MALLOC_H
- #include "config.h"
- #include <stddef.h>
- #include "base/basictypes.h"
- #include "common.h"
- namespace tcmalloc {
- static const uintptr_t kEmergencyArenaShift = 20+4; // 16 megs
- static const uintptr_t kEmergencyArenaSize = 1 << kEmergencyArenaShift;
- extern __attribute__ ((visibility("internal"))) char *emergency_arena_start;
- extern __attribute__ ((visibility("internal"))) uintptr_t emergency_arena_start_shifted;;
- PERFTOOLS_DLL_DECL void *EmergencyMalloc(size_t size);
- PERFTOOLS_DLL_DECL void EmergencyFree(void *p);
- PERFTOOLS_DLL_DECL void *EmergencyCalloc(size_t n, size_t elem_size);
- PERFTOOLS_DLL_DECL void *EmergencyRealloc(void *old_ptr, size_t new_size);
- static inline bool IsEmergencyPtr(const void *_ptr) {
- uintptr_t ptr = reinterpret_cast<uintptr_t>(_ptr);
- return UNLIKELY((ptr >> kEmergencyArenaShift) == emergency_arena_start_shifted)
- && emergency_arena_start_shifted;
- }
- } // namespace tcmalloc
- #endif
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