/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/assert.h"
#include "libc/atomic.h"
#include "libc/calls/state.internal.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/errno.h"
#include "libc/intrin/atomic.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/weaken.h"
#include "libc/log/backtrace.internal.h"
#include "libc/log/internal.h"
#include "libc/runtime/runtime.h"
#include "libc/runtime/symbols.internal.h"
#include "libc/thread/thread.h"
#include "libc/thread/tls.h"

relegated void __assert_fail(const char *expr, const char *file, int line) {
  int me, owner;
  static atomic_int once;
  if (!__assert_disable) {
    strace_enabled(-1);
    ftrace_enabled(-1);
    owner = 0;
    me = __tls_enabled ? __get_tls()->tib_tid : sys_gettid();
    pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, 0);
    kprintf("%s:%d: assert(%s) failed (tid %d) %m\n", file, line, expr, me);
    if (__vforked ||
        atomic_compare_exchange_strong_explicit(
            &once, &owner, me, memory_order_relaxed, memory_order_relaxed)) {
      __restore_tty();
      if (_weaken(ShowBacktrace)) {
        _weaken(ShowBacktrace)(2, __builtin_frame_address(0));
      } else if (_weaken(PrintBacktraceUsingSymbols) &&
                 _weaken(GetSymbolTable)) {
        _weaken(PrintBacktraceUsingSymbols)(2, __builtin_frame_address(0),
                                            _weaken(GetSymbolTable)());
      } else {
        kprintf("can't backtrace b/c `ShowCrashReports` not linked\n");
      }
      _Exitr(23);
    } else if (owner == me) {
      kprintf("assert failed while failing\n");
      _Exitr(24);
    } else {
      _Exit1(25);
    }
  }
}
