1fc5ccfe76
Introduce an M_SET_ALLOCATION_LIMIT enumerator for android_mallopt(), which can be used to set an upper bound on the total size of all allocations made using the memory allocation APIs. This is useful for programs such as audioextractor and mediaserver which need to set such a limit as a security mitigation. Currently these programs are using setrlimit(RLIMIT_AS) which isn't exactly what these programs want to control. RLIMIT_AS is also problematic under sanitizers which allocate large amounts of address space as shadow memory, and is especially problematic under shadow call stack, which requires 16MB of address space per thread. Add new unit tests for bionic. Add new unit tests for malloc debug that verify that when the limit is enabled, malloc debug still functions for nearly every allocation function. Bug: 118642754 Test: Ran bionic-unit-tests/bionic-unit-tests-static. Test: Ran malloc debug tests and perfetto integration tests. Change-Id: I735403c4d2c87f00fb2cdef81d00af0af446b2bb
34 lines
1.5 KiB
C
34 lines
1.5 KiB
C
/*
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* Copyright (C) 2019 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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#pragma once
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#include <stdint.h>
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// Function prototypes.
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bool LimitEnable(void* arg, size_t arg_size);
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