gdb/testsuite/gdb.threads/interrupt-while-step-over.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2016-2019 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 <stdlib.h>
  21
  22 #define NUM_THREADS 20
  23 const int num_threads = NUM_THREADS;
  24
  25 static pthread_t child_thread[NUM_THREADS];
  26
  27 static pthread_barrier_t threads_started_barrier;
  28
  29 volatile int always_zero;
  30 volatile unsigned int dummy;
  31
  32 static void
  33 infinite_loop (void)
  34 {
  35   while (1)
  36     {
  37       dummy++; /* set breakpoint here */
  38     }
  39 }
  40
  41 static void *
  42 child_function (void *arg)
  43 {
  44   pthread_barrier_wait (&threads_started_barrier);
  45
  46   infinite_loop ();
  47 }
  48
  49 void
  50 all_started (void)
  51 {
  52 }
  53
  54 int
  55 main (void)
  56 {
  57   int res;
  58   int i;
  59
  60   alarm (300);
  61
  62   pthread_barrier_init (&threads_started_barrier, NULL, NUM_THREADS + 1);
  63
  64   for (i = 0; i < NUM_THREADS; i++)
  65     {
  66       res = pthread_create (&child_thread[i], NULL, child_function, NULL);
  67     }
  68
  69   /* Wait until all threads have been scheduled.  */
  70   pthread_barrier_wait (&threads_started_barrier);
  71
  72   all_started ();
  73
  74   infinite_loop ();
  75 }