gdb/testsuite/gdb.threads/stop-with-handle.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2019-2020 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 <stdio.h>
  19 #include <pthread.h>
  20 #include <unistd.h>
  21
  22 /* A place to record the thread.  */
  23 pthread_t the_thread;
  24
  25 /* The worker thread just spins forever.  */
  26 void*
  27 thread_worker (void *payload)
  28 {
  29   while (1)
  30     {
  31       sleep (1);
  32     }
  33
  34   return NULL;
  35 }
  36
  37 /* Create a worker thread.  */
  38 int
  39 spawn_thread ()
  40 {
  41   if (pthread_create (&the_thread, NULL, thread_worker, NULL))
  42     {
  43       fprintf (stderr, "Unable to create thread.\n");
  44       return 0;
  45     }
  46   return 1;
  47 }
  48
  49 /* A place for GDB to place a breakpoint.   */
  50 void __attribute__((used))
  51 breakpt ()
  52 {
  53   /* Nothing.  */
  54 }
  55
  56 /* Create a worker thread that just spins forever, then enter a loop
  57    periodically calling the BREAKPT function.  */
  58 int
  59 main()
  60 {
  61   /* Ensure we stop if GDB crashes and DejaGNU fails to kill us.  */
  62   alarm (10);
  63
  64   spawn_thread ();
  65
  66   while (1)
  67     {
  68       sleep (1);
  69
  70       breakpt ();
  71     }
  72
  73   return 0;
  74 }