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| | #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);
}
|