1#include <unistd.h>
2#include <signal.h>
3#include "syscall.h"
4#include "libc.h"
5#include "lock.h"
6#include "pthread_impl.h"
7#include "aio_impl.h"
8#include "fork_impl.h"
9
10static void dummy(int x) { }
11weak_alias(dummy, __aio_atfork);
12
13void __post_Fork(int ret)
14{
15 if (!ret) {
16 pthread_t self = __pthread_self();
17 self->tid = __syscall(SYS_set_tid_address, &__thread_list_lock);
18 self->robust_list.off = 0;
19 self->robust_list.pending = 0;
20 self->next = self->prev = self;
21 __thread_list_lock = 0;
22 libc.threads_minus_1 = 0;
23 if (libc.need_locks) libc.need_locks = -1;
24 }
25 UNLOCK(__abort_lock);
26 if (!ret) __aio_atfork(1);
27}
28
29pid_t _Fork(void)
30{
31 pid_t ret;
32 sigset_t set;
33 __block_all_sigs(&set);
34 LOCK(__abort_lock);
35#ifdef SYS_fork
36 ret = __syscall(SYS_fork);
37#else
38 ret = __syscall(SYS_clone, SIGCHLD, 0);
39#endif
40 __post_Fork(ret);
41 __restore_sigs(&set);
42 return __syscall_ret(ret);
43}