gdb/testsuite/gdb.threads/schedlock-new-thread.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2021-2023 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 <assert.h>
  20 #include <unistd.h>
  21
  22 static void *
  23 thread_func (void *arg)
  24 {
  25 #if !SCHEDLOCK
  26   while (1)
  27     sleep (1);
  28 #endif
  29
  30   return NULL;
  31 }
  32
  33 int
  34 main (void)
  35 {
  36   pthread_t thread;
  37   int ret;
  38
  39   ret = pthread_create (&thread, NULL, thread_func, NULL); /* set break 1 here */
  40   assert (ret == 0);
  41
  42 #if SCHEDLOCK
  43   /* When testing with schedlock enabled, the new thread won't run, so
  44      we can't join it, as that would hang forever.  Instead, sleep for
  45      a bit, enough that if the spawned thread is scheduled, it hits
  46      the thread_func breakpoint before the main thread reaches the
  47      "return 0" line below.  */
  48   sleep (3);
  49 #else
  50   pthread_join (thread, NULL);
  51 #endif
  52
  53   return 0; /* set break 2 here */
  54 }