| 1 | #include <stdlib.h> |
| 2 | #include <signal.h> |
| 3 | #include "syscall.h" |
| 4 | #include "pthread_impl.h" |
| 5 | #include "atomic.h" |
| 6 | #include "lock.h" |
| 7 | #include "ksigaction.h" |
| 8 | |
| 9 | _Noreturn void abort(void) |
| 10 | { |
| 11 | raise(SIGABRT); |
| 12 | |
| 13 | /* If there was a SIGABRT handler installed and it returned, or if |
| 14 | * SIGABRT was blocked or ignored, take an AS-safe lock to prevent |
| 15 | * sigaction from installing a new SIGABRT handler, uninstall any |
| 16 | * handler that may be present, and re-raise the signal to generate |
| 17 | * the default action of abnormal termination. */ |
| 18 | __block_all_sigs(0); |
| 19 | LOCK(__abort_lock); |
| 20 | __syscall(SYS_rt_sigaction, SIGABRT, |
| 21 | &(struct k_sigaction){.handler = SIG_DFL}, 0, _NSIG/8); |
| 22 | __syscall(SYS_tkill, __pthread_self()->tid, SIGABRT); |
| 23 | __syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, |
| 24 | &(long[_NSIG/(8*sizeof(long))]){1UL<<(SIGABRT-1)}, 0, _NSIG/8); |
| 25 | |
| 26 | /* Beyond this point should be unreachable. */ |
| 27 | a_crash(); |
| 28 | raise(SIGKILL); |
| 29 | _Exit(127); |
| 30 | } |