mirror of
https://github.com/jart/cosmopolitan.git
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59 lines
2.8 KiB
C
59 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/lockcmpxchgp.h"
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#include "libc/log/backtrace.internal.h"
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#include "libc/log/internal.h"
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#include "libc/log/libfatal.internal.h"
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#include "libc/log/log.h"
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#include "libc/runtime/internal.h"
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#include "libc/runtime/runtime.h"
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#if SupportsMetal()
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STATIC_YOINK("_idt");
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#endif
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/**
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* Aborts process after printing a backtrace.
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*
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* If a debugger is present then this will trigger a breakpoint.
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*/
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relegated wontreturn void __die(void) {
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/* asan runtime depends on this function */
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int me, owner;
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static int sync;
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owner = 0;
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me = sys_gettid();
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if (_lockcmpxchgp(&sync, &owner, me)) {
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__restore_tty();
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if (IsDebuggerPresent(false)) {
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DebugBreak();
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}
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ShowBacktrace(2, __builtin_frame_address(0));
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_Exitr(77);
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} else if (owner == me) {
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kprintf("die failed while dying\n");
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_Exitr(78);
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} else {
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_Exit1(79);
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}
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}
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