5905d6f879
This doesn't address `struct sigaction` and `sigaction`. That will come later. Bug: http://b/72493232 Test: ran tests Change-Id: I4134346757ce3a4dac6feae413361cec16223386
83 lines
3.3 KiB
C++
83 lines
3.3 KiB
C++
/*
|
|
* 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 <sys/syscall.h>
|
|
#include <unistd.h>
|
|
|
|
// We call tgkill(2) directly instead of raise (or even the libc tgkill wrapper), to reduce the
|
|
// number of uninteresting stack frames at the top of a crash.
|
|
static inline __always_inline void inline_tgkill(pid_t pid, pid_t tid, int sig) {
|
|
#if defined(__arm__)
|
|
register int r0 __asm__("r0") = pid;
|
|
register int r1 __asm__("r1") = tid;
|
|
register int r2 __asm__("r2") = sig;
|
|
register int r7 __asm__("r7") = __NR_tgkill;
|
|
__asm__("swi #0" : "=r"(r0) : "r"(r0), "r"(r1), "r"(r2), "r"(r7) : "memory");
|
|
#elif defined(__aarch64__)
|
|
register long x0 __asm__("x0") = pid;
|
|
register long x1 __asm__("x1") = tid;
|
|
register long x2 __asm__("x2") = sig;
|
|
register long x8 __asm__("x8") = __NR_tgkill;
|
|
__asm__("svc #0" : "=r"(x0) : "r"(x0), "r"(x1), "r"(x2), "r"(x8) : "memory");
|
|
#else
|
|
syscall(__NR_tgkill, pid, tid, sig);
|
|
#endif
|
|
}
|
|
|
|
void abort() {
|
|
// Protect ourselves against stale cached PID/TID values by fetching them via syscall.
|
|
// http://b/37769298
|
|
pid_t pid = syscall(__NR_getpid);
|
|
pid_t tid = syscall(__NR_gettid);
|
|
|
|
// Don't block SIGABRT to give any signal handler a chance; we ignore
|
|
// any errors -- X311J doesn't allow abort to return anyway.
|
|
sigset64_t mask;
|
|
sigfillset64(&mask);
|
|
sigdelset64(&mask, SIGABRT);
|
|
|
|
sigprocmask64(SIG_SETMASK, &mask, nullptr);
|
|
inline_tgkill(pid, tid, 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);
|
|
|
|
sigprocmask64(SIG_SETMASK, &mask, nullptr);
|
|
inline_tgkill(pid, tid, SIGABRT);
|
|
|
|
// If we get this far, just exit.
|
|
_exit(127);
|
|
}
|