72df6708c8
In order to enforce this constraint: The pointer returned if the allocation succeeds shall be suitably aligned so that it may be assigned to a pointer to any type of object and then used to access such an object in the space allocated. Force all allocations on 32 bit systems to have 8 byte alignment, and all allocations on 64 bit systems to have 16 byte alignment. Add a test to verify that the allocator returns the correct alignments. Bug: 26739265 Change-Id: I9af53279617408676b94e4ec6481b3ed7ffafc6a
81 lines
2.8 KiB
C++
81 lines
2.8 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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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
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* are met:
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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 copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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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
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef MALLOC_DEBUG_CONFIG_H
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#define MALLOC_DEBUG_CONFIG_H
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#include <stdint.h>
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constexpr uint64_t FRONT_GUARD = 0x1;
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constexpr uint64_t REAR_GUARD = 0x2;
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constexpr uint64_t BACKTRACE = 0x4;
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constexpr uint64_t FILL_ON_ALLOC = 0x8;
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constexpr uint64_t FILL_ON_FREE = 0x10;
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constexpr uint64_t EXPAND_ALLOC = 0x20;
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constexpr uint64_t FREE_TRACK = 0x40;
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constexpr uint64_t TRACK_ALLOCS = 0x80;
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constexpr uint64_t LEAK_TRACK = 0x100;
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// In order to guarantee posix compliance, set the minimum alignment
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// to 8 bytes for 32 bit systems and 16 bytes for 64 bit systems.
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#if defined(__LP64__)
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constexpr size_t MINIMUM_ALIGNMENT_BYTES = 16;
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#else
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constexpr size_t MINIMUM_ALIGNMENT_BYTES = 8;
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#endif
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// If only one or more of these options is set, then no special header is needed.
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constexpr uint64_t NO_HEADER_OPTIONS = FILL_ON_ALLOC | FILL_ON_FREE | EXPAND_ALLOC;
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struct Config {
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bool SetFromProperties();
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size_t front_guard_bytes = 0;
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size_t rear_guard_bytes = 0;
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bool backtrace_enable_on_signal = false;
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int backtrace_signal = 0;
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bool backtrace_enabled = false;
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size_t backtrace_frames = 0;
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size_t fill_on_alloc_bytes = 0;
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size_t fill_on_free_bytes = 0;
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size_t expand_alloc_bytes = 0;
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size_t free_track_allocations = 0;
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size_t free_track_backtrace_num_frames = 0;
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uint64_t options = 0;
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uint8_t fill_alloc_value;
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uint8_t fill_free_value;
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uint8_t front_guard_value;
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uint8_t rear_guard_value;
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};
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#endif // MALLOC_DEBUG_CONFIG_H
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