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 /* Allow for as much timeout as DejaGnu wants, plus a bit of
  26    slack.  */
  27 #define SECONDS (TIMEOUT + 20)
  28
  29 pthread_t child_thread[NUM_THREADS];
  30 volatile pthread_t signal_thread;
  31 volatile int got_sig;
  32
  33 void
  34 handler (int signo)
  35 {
  36   got_sig = 1;
  37 }
  38
  39 void
  40 loop_broke (void)
  41 {
  42 }
  43
  44 #define INF_LOOP                                \
  45   do                                            \
  46     {                                           \
  47       while (!got_sig)                          \
  48         ;                                       \
  49     }                                           \
  50   while (0)
  51
  52 void *
  53 child_function (void *arg)
  54 {
  55   pthread_t self = pthread_self ();
  56
  57   while (1)
  58     {
  59       /* Reset the timer before going to INF_LOOP.  */
  60       alarm (SECONDS);
  61       INF_LOOP; /* set thread breakpoint here */
  62       loop_broke ();
  63     }
  64 }
  65
  66 int
  67 main (void)
  68 {
  69   int res;
  70   int i;
  71
  72   signal (SIGUSR1, handler);
  73
  74   for (i = 0; i < NUM_THREADS; i++)
  75     {
  76       res = pthread_create (&child_thread[i], NULL, child_function, NULL);
  77     }
  78
  79   while (1)
  80     {
  81       pthread_kill (signal_thread, SIGUSR1); /* set kill breakpoint here */
  82       /* Reset the timer before going to INF_LOOP.  */
  83       alarm (SECONDS);
  84       INF_LOOP;
  85       loop_broke ();
  86     }
  87
  88   exit(EXIT_SUCCESS);
  89 }