mods/android/bionic/libc/bionic/abort.cpp

/*
 * Copyright (c) 1985 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 */

#include <signal.h>
#include <stdlib.h>
#include <unistd.h>

#ifdef __arm__
extern "C" __LIBC_HIDDEN__ void __libc_android_abort()
#else
void abort()
#endif
{
  /* ARC MOD BEGIN */
#if defined(HAVE_ARC)
  // raise() is not supported on NaCl and Bare Metal, Call an
  // instruction that should crash.
# if defined(__arm__) && !defined(__native_client__)
  // ARM BareMetal __builtin_trap() resolves to abort(), so special
  // case to use a different instruction to kill myself.
  asm("bkpt 0");
# else // defined(__arm__) && !defined(__native_client__)
  __builtin_trap();
# endif // defined(__arm__) && !defined(__native_client__)
#else // defined(HAVE_ARC)
  /* ARC MOD END */
  // Don't block SIGABRT to give any signal handler a chance; we ignore
  // any errors -- X311J doesn't allow abort to return anyway.
  sigset_t mask;
  sigfillset(&mask);
  sigdelset(&mask, SIGABRT);
  sigprocmask(SIG_SETMASK, &mask, NULL);

  raise(SIGABRT);

  // If SIGABRT ignored, or caught and the handler returns,
  // remove the SIGABRT signal handler and raise SIGABRT again.
  struct sigaction sa;
  sa.sa_handler = SIG_DFL;
  sa.sa_flags   = SA_RESTART;
  sigemptyset(&sa.sa_mask);
  sigaction(SIGABRT, &sa, &sa);
  sigprocmask(SIG_SETMASK, &mask, NULL);
  raise(SIGABRT);
  _exit(1);
  /* ARC MOD BEGIN */
#endif
  /* ARC MOD END */
}
/* ARC MOD BEGIN */
// Implements abort in C instead of the assembly code used in bionic on ARM.
#ifdef __arm__
extern "C" void abort(void) {
  __libc_android_abort();
}
#endif
/* ARC MOD END */