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
31
32
33
34
35
36
37
38
39
40
41
| | #include <unistd.h>
#include <string.h>
#include <signal.h>
#include "syscall.h"
#include "libc.h"
#include "pthread_impl.h"
static void dummy(int x)
{
}
weak_alias(dummy, __fork_handler);
weak_alias(dummy, __aio_atfork);
pid_t fork(void)
{
pid_t ret;
sigset_t set;
__fork_handler(-1);
__block_all_sigs(&set);
__aio_atfork(-1);
#ifdef SYS_fork
ret = __syscall(SYS_fork);
#else
ret = __syscall(SYS_clone, SIGCHLD, 0);
#endif
if (!ret) {
pthread_t self = __pthread_self();
self->tid = __syscall(SYS_gettid);
self->robust_list.off = 0;
self->robust_list.pending = 0;
self->next = self->prev = self;
__thread_list_lock = 0;
libc.threads_minus_1 = 0;
if (libc.need_locks > 0) libc.need_locks = -2;
}
__aio_atfork(!ret);
__restore_sigs(&set);
__fork_handler(!ret);
return __syscall_ret(ret);
}
|