gdb/testsuite/gdb.base/run-attach-while-running.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 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 <unistd.h>
  19 #include <assert.h>
  20
  21 #ifndef WITH_THREADS
  22 # error "WITH_THREADS must be defined."
  23 #endif
  24
  25 #if WITH_THREADS
  26 # include <pthread.h>
  27
  28 static pthread_barrier_t barrier;
  29
  30 static void *
  31 thread_func (void *p)
  32 {
  33   pthread_barrier_wait (&barrier);
  34
  35   for (int i = 0; i < 30; i++)
  36     sleep (1);
  37
  38   return NULL;
  39 }
  40
  41 #endif /* WITH_THREADS */
  42
  43 static void
  44 all_started (void)
  45 {}
  46
  47 int
  48 main (void)
  49 {
  50   alarm (30);
  51
  52 #if WITH_THREADS
  53   int ret = pthread_barrier_init (&barrier, NULL, 2);
  54   assert (ret == 0);
  55
  56   pthread_t thread;
  57   ret = pthread_create (&thread, NULL, thread_func, NULL);
  58   assert (ret == 0);
  59
  60   pthread_barrier_wait (&barrier);
  61 #endif /* WITH_THREADS */
  62
  63   all_started ();
  64
  65   for (int i = 0; i < 30; i++)
  66     sleep (1);
  67
  68   return 0;
  69 }