e73c932373
Do an in-process unwind for processes that have PR_SET_NO_NEW_PRIVS enabled. Bug: http://b/34684590 Test: debuggerd_test, killall -ABRT media.codec Change-Id: I62562ec2c419d6643970100ab1cc0288982a1eed
48 lines
2.2 KiB
C++
48 lines
2.2 KiB
C++
/*
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* Copyright (C) 2017 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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#include <stddef.h>
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#include <sys/ucontext.h>
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#include <unistd.h>
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#include "tombstone.h"
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extern "C" void __linker_use_fallback_allocator();
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extern "C" bool debuggerd_fallback(ucontext_t* ucontext, siginfo_t* siginfo, void* abort_message) {
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// This is incredibly sketchy to do inside of a signal handler, especially when libbacktrace
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// uses the C++ standard library throughout, but this code runs in the linker, so we'll be using
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// the linker's malloc instead of the libc one. Switch it out for a replacement, just in case.
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//
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// This isn't the default method of dumping because it can fail in cases such as memory space
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// exhaustion.
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__linker_use_fallback_allocator();
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engrave_tombstone_ucontext(-1, getpid(), gettid(), reinterpret_cast<uintptr_t>(abort_message),
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siginfo, ucontext);
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return true;
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}
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