gdb/testsuite/gdb.threads/process-dies-while-handling-bp.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2015-2021 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 <assert.h>
  19 #include <pthread.h>
  20 #include <unistd.h>
  21
  22 /* Number of threads.  Each thread continuously steps over a
  23    breakpoint.  */
  24 #define NTHREADS 10
  25
  26 pthread_t threads[NTHREADS];
  27
  28 pthread_barrier_t barrier;
  29
  30 /* Used to create a conditional breakpoint that always fails.  */
  31 volatile int zero;
  32
  33 static void *
  34 thread_func (void *arg)
  35 {
  36   pthread_barrier_wait (&barrier);
  37
  38   while (1)
  39     {
  40       usleep (1); /* set break here */
  41     }
  42
  43   return NULL;
  44 }
  45
  46 int
  47 main (void)
  48 {
  49   int ret;
  50   int i;
  51
  52   /* Don't run forever.  */
  53   alarm (180);
  54
  55   pthread_barrier_init (&barrier, NULL, NTHREADS + 1);
  56
  57   /* Start the threads that constantly hits a conditional breakpoint
  58      that needs to be stepped over.  */
  59   for (i = 0; i < NTHREADS; i++)
  60     {
  61       ret = pthread_create (&threads[i], NULL, thread_func, NULL);
  62       assert (ret == 0);
  63     }
  64
  65   /* Wait until all threads are up and running.  */
  66   pthread_barrier_wait (&barrier);
  67
  68   /* Let them start hitting the breakpoint.  */
  69   usleep (100);
  70
  71   /* Exit abruptly.  */
  72   return 0;
  73 }