gdb/testsuite/gdb.threads/step-N-all-progress.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2022-2024 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 <stddef.h>
  21
  22 static pthread_barrier_t barrier;
  23
  24 static void *
  25 thread_func (void *arg)
  26 {
  27   pthread_barrier_wait (&barrier);
  28   return NULL;
  29 }
  30
  31 int
  32 main ()
  33 {
  34   pthread_t thread;
  35   int ret;
  36
  37   alarm (30);
  38
  39   pthread_barrier_init (&barrier, NULL, 2);
  40
  41   /* We run to this line below, and then issue "next 3".  That should
  42      step over the 3 lines below and land on the return statement.  If
  43      GDB prematurely stops the thread_func thread after the first of
  44      the 3 nexts (and never resumes it again), then the join won't
  45      ever return.  */
  46   pthread_create (&thread, NULL, thread_func, NULL); /* set break here */
  47   pthread_barrier_wait (&barrier);
  48   pthread_join (thread, NULL);
  49
  50   return 0;
  51 }