gdb/testsuite/gdb.threads/step-bg-decr-pc-switch-thread.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2015-2023 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 <unistd.h>
  19 #include <pthread.h>
  20 #include <assert.h>
  21
  22 /* NOP instruction: must have the same size as the breakpoint
  23    instruction for the test to be effective.  */
  24
  25 #if defined (__s390__) || defined (__s390x__)
  26 # define NOP asm ("nopr 0")
  27 #else
  28 # define NOP asm ("nop")
  29 #endif
  30
  31 void *
  32 thread_function (void *arg)
  33 {
  34   NOP; /* set breakpoint here */
  35   while (1);
  36 }
  37
  38 int
  39 main (void)
  40 {
  41   int res;
  42   pthread_t thread;
  43
  44   alarm (300);
  45
  46   res = pthread_create (&thread,
  47                        NULL,
  48                        thread_function,
  49                        NULL);
  50   assert (res == 0);
  51
  52   pthread_join (thread, NULL);
  53   return 0;
  54 }