1 #include <unistd.h>
2 #include <string.h>
3 #include <signal.h>
4 #include "syscall.h"
5 #include "libc.h"
6 #include "pthread_impl.h"
7 
dummy(int x)8 static void dummy(int x)
9 {
10 }
11 
12 weak_alias(dummy, __fork_handler);
13 
fork(void)14 pid_t fork(void)
15 {
16 	pid_t ret;
17 	sigset_t set;
18 	__fork_handler(-1);
19 	__block_all_sigs(&set);
20 #ifdef SYS_fork
21 	ret = syscall(SYS_fork);
22 #else
23 	ret = syscall(SYS_clone, SIGCHLD, 0);
24 #endif
25 	if (!ret) {
26 		pthread_t self = __pthread_self();
27 		self->tid = __syscall(SYS_gettid);
28 		self->robust_list.off = 0;
29 		self->robust_list.pending = 0;
30 		libc.threads_minus_1 = 0;
31 	}
32 	__restore_sigs(&set);
33 	__fork_handler(!ret);
34 	return ret;
35 }
36