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