1/* Test case for C-c sent to threads with pending signals.  Before I
2   even get there, creating a thread and sending it a signal before it
3   has a chance to run leads to an internal error in GDB.  We need to
4   record that there's a pending SIGSTOP, so that we'll ignore it
5   later, and pass the current signal back to the thread.
6
7   The fork/vfork case has similar trouble but that's even harder
8   to get around.  We may need to send a SIGCONT to cancel out the
9   SIGSTOP.  Different kernels may do different things if the thread
10   is stopped by ptrace and sent a SIGSTOP.  */
11
12#include <stdio.h>
13#include <unistd.h>
14#include <stdlib.h>
15#include <pthread.h>
16#include <signal.h>
17
18/* Loop long enough for GDB to send a few signals of its own, but
19   don't hang around eating CPU forever if something goes wrong during
20   testing.  */
21#define NSIGS 10000000
22
23void
24handler (int sig)
25{
26  ;
27}
28
29pthread_t main_thread;
30pthread_t child_thread, child_thread_two;
31
32void *
33child_two (void *arg)
34{
35  int i;
36
37  for (i = 0; i < NSIGS; i++)
38    pthread_kill (child_thread, SIGUSR1);
39}
40
41void *
42thread_function (void *arg)
43{
44  int i;
45
46  for (i = 0; i < NSIGS; i++)
47    pthread_kill (child_thread_two, SIGUSR2);
48}
49
50int main()
51{
52  int i;
53
54  signal (SIGUSR1, handler);
55  signal (SIGUSR2, handler);
56
57  main_thread = pthread_self ();
58  pthread_create (&child_thread, NULL, thread_function, NULL);
59  pthread_create (&child_thread_two, NULL, child_two, NULL);
60
61  for (i = 0; i < NSIGS; i++)
62    pthread_kill (child_thread_two, SIGUSR1);
63
64  pthread_join (child_thread, NULL);
65
66  exit (0);
67}
68