48 lines
2.2 KiB
C
48 lines
2.2 KiB
C
/*
|
|
* Copyright (C) 2020 The Android Open Source Project
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
/*
|
|
* Implement fast stack unwinding for stack frames with frame pointers. Stores at most num_entries
|
|
* return addresses to buffer buf. Returns the number of available return addresses, which may be
|
|
* greater than num_entries.
|
|
*
|
|
* This function makes no guarantees about its behavior on encountering a frame built without frame
|
|
* pointers, except that it should not crash or enter an infinite loop, and that any frames prior to
|
|
* the frame built without frame pointers should be correct.
|
|
*
|
|
* This function is only meant to be used with memory safety tools such as sanitizers which need to
|
|
* take stack traces efficiently. Normal applications should use APIs such as libunwindstack or
|
|
* _Unwind_Backtrace.
|
|
*/
|
|
extern "C" size_t android_unsafe_frame_pointer_chase(uintptr_t* buf, size_t num_entries);
|