gdb/testsuite/gdb.threads/stepi-over-clone.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 <stdio.h>
  19 #include <pthread.h>
  20 #include <unistd.h>
  21 #include <signal.h>
  22 #include <stdlib.h>
  23
  24 /* Set this to non-zero from GDB to start a third worker thread.  */
  25 volatile int start_third_thread = 0;
  26
  27 void *
  28 thread_worker_2 (void *arg)
  29 {
  30   int i;
  31
  32   printf ("Hello from the third thread.\n");
  33   fflush (stdout);
  34
  35   for (i = 0; i < 300; ++i)
  36     sleep (1);
  37
  38   return NULL;
  39 }
  40
  41 void *
  42 thread_worker_1 (void *arg)
  43 {
  44   int i;
  45   pthread_t thr;
  46   void *val;
  47
  48   if (start_third_thread)
  49     pthread_create (&thr, NULL, thread_worker_2, NULL);
  50
  51   printf ("Hello from the first thread.\n");
  52   fflush (stdout);
  53
  54   for (i = 0; i < 300; ++i)
  55     sleep (1);
  56
  57   if (start_third_thread)
  58     pthread_join (thr, &val);
  59
  60   return NULL;
  61 }
  62
  63 void *
  64 thread_idle_loop (void *arg)
  65 {
  66   int i;
  67
  68   for (i = 0; i < 300; ++i)
  69     sleep (1);
  70
  71   return NULL;
  72 }
  73
  74 int
  75 main ()
  76 {
  77   pthread_t thr, thr_idle;
  78   void *val;
  79
  80   if (getenv ("MAKE_EXTRA_THREAD") != NULL)
  81     pthread_create (&thr_idle, NULL, thread_idle_loop, NULL);
  82
  83   pthread_create (&thr, NULL, thread_worker_1, NULL);
  84   pthread_join (thr, &val);
  85
  86   if (getenv ("MAKE_EXTRA_THREAD") != NULL)
  87     pthread_join (thr_idle, &val);
  88
  89   return 0;
  90 }