lldb/test/API/macosx/thread_suspend/main.c

   1 #include <pthread.h>
   2 #include <mach/thread_act.h>
   3 #include <unistd.h>
   4
   5 pthread_mutex_t suspend_mutex = PTHREAD_MUTEX_INITIALIZER;
   6 pthread_mutex_t signal_mutex = PTHREAD_MUTEX_INITIALIZER;
   7 pthread_cond_t signal_cond = PTHREAD_COND_INITIALIZER;
   8
   9 int g_running_count = 0;
  10
  11 int
  12 function_to_call() {
  13   return g_running_count;
  14 }
  15
  16 void *
  17 suspend_func (void *unused) {
  18   pthread_setname_np("Look for me");
  19   pthread_cond_signal(&signal_cond);
  20   pthread_mutex_lock(&suspend_mutex);
  21
  22   return NULL; // We allowed the suspend thread to run
  23 }
  24
  25 void *
  26 running_func (void *input) {
  27   while (g_running_count < 10) {
  28     usleep (100);
  29     g_running_count++;  // Break here to show we can handle breakpoints
  30   }
  31   return NULL;
  32 }
  33
  34 int
  35 main()
  36 {
  37   pthread_t suspend_thread; // Stop here to get things going
  38
  39   pthread_mutex_lock(&suspend_mutex);
  40   pthread_mutex_lock(&signal_mutex);
  41   pthread_create(&suspend_thread, NULL, suspend_func, NULL);
  42
  43   pthread_cond_wait(&signal_cond, &signal_mutex);
  44
  45   mach_port_t th_port = pthread_mach_thread_np(suspend_thread);
  46   thread_suspend(th_port);
  47
  48   pthread_mutex_unlock(&suspend_mutex);
  49
  50   pthread_t running_thread;
  51   pthread_create(&running_thread, NULL, running_func, NULL);
  52
  53   pthread_join(running_thread, NULL);
  54   thread_resume(th_port);             // Break here after thread_join
  55
  56   pthread_join(suspend_thread, NULL);
  57   return 0; // Break here to make sure the thread exited normally
  58 }