mirror of
https://github.com/jart/cosmopolitan.git
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64 lines
3.2 KiB
C
64 lines
3.2 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/assert.h"
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#include "libc/bits/weaken.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/state.internal.h"
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#include "libc/calls/syscall-sysv.internal.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/runtime/internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/symbols.internal.h"
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/**
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* Handles failure of assert() macro.
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*/
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relegated void __assert_fail(const char *expr, const char *file, int line) {
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int me, owner;
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static int sync;
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if (!__assert_disable) {
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--__strace;
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--__ftrace;
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owner = 0;
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me = sys_gettid();
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kprintf("%s:%d: assert(%s) failed (tid %d)\n", file, line, expr, me);
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if (__vforked || _lockcmpxchgp(&sync, &owner, me)) {
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__restore_tty();
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if (weaken(ShowBacktrace)) {
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weaken(ShowBacktrace)(2, __builtin_frame_address(0));
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} else if (weaken(PrintBacktraceUsingSymbols) && weaken(GetSymbolTable)) {
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weaken(PrintBacktraceUsingSymbols)(2, __builtin_frame_address(0),
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weaken(GetSymbolTable)());
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} else {
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kprintf("can't backtrace b/c `ShowCrashReports` not linked\n");
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}
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__restorewintty();
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_Exit(23);
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} else if (owner == me) {
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kprintf("assert failed while failing\n");
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__restorewintty();
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_Exit(24);
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} else {
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_Exit1(25);
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}
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}
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}
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