gdb/testsuite/gdb.threads/execl.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2008-2024 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 /* Test handling thread control across an execl.  */
  19
  20 /* The original image loads a thread library and has several threads,
  21    while the new image does not load a thread library.  */
  22
  23 #include <unistd.h>
  24 #include <pthread.h>
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdlib.h>
  28
  29 static pthread_barrier_t threads_started_barrier;
  30
  31 void *
  32 thread_function (void *arg)
  33 {
  34   pthread_barrier_wait (&threads_started_barrier);
  35
  36   while (1)
  37     sleep (100);
  38   return NULL;
  39 }
  40
  41 int
  42 main (int argc, char* argv[])
  43 {
  44   pthread_t thread1;
  45   pthread_t thread2;
  46   char *new_image;
  47
  48   pthread_barrier_init (&threads_started_barrier, NULL, 3);
  49
  50   pthread_create (&thread1, NULL, thread_function, NULL);
  51   pthread_create (&thread2, NULL, thread_function, NULL);
  52
  53   pthread_barrier_wait (&threads_started_barrier);
  54
  55   new_image = malloc (strlen (argv[0]) + 2);
  56   strcpy (new_image, argv[0]);
  57   strcat (new_image, "1");
  58
  59   if (execl (new_image, new_image, NULL) == -1) /* set breakpoint here */
  60     return 1;
  61
  62   return 0;
  63 }