gdb/testsuite/gdb.threads/non-stop-fair-events.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2014-2015 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <pthread.h>
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include <signal.h>
  22
  23 #define NUM_THREADS 10
  24 const int num_threads = NUM_THREADS;
  25
  26 pthread_t child_thread[NUM_THREADS];
  27 volatile pthread_t signal_thread;
  28 volatile int got_sig;
  29
  30 void
  31 handler (int signo)
  32 {
  33   got_sig = 1;
  34 }
  35
  36 void
  37 loop_broke (void)
  38 {
  39 }
  40
  41 #define INF_LOOP                                \
  42   do                                            \
  43     {                                           \
  44       while (!got_sig)                          \
  45         ;                                       \
  46     }                                           \
  47   while (0)
  48
  49 void *
  50 child_function (void *arg)
  51 {
  52   pthread_t self = pthread_self ();
  53
  54   while (1)
  55     {
  56       INF_LOOP; /* set thread breakpoint here */
  57       loop_broke ();
  58     }
  59 }
  60
  61 int
  62 main (void)
  63 {
  64   int res;
  65   int i;
  66
  67   alarm (60);
  68
  69   signal (SIGUSR1, handler);
  70
  71   for (i = 0; i < NUM_THREADS; i++)
  72     {
  73       res = pthread_create (&child_thread[i], NULL, child_function, NULL);
  74     }
  75
  76   while (1)
  77     {
  78       pthread_kill (signal_thread, SIGUSR1); /* set kill breakpoint here */
  79       INF_LOOP;
  80       loop_broke ();
  81     }
  82
  83   exit(EXIT_SUCCESS);
  84 }