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