gdb/testsuite/gdb.threads/non-ldr-exc-2.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2009-2022 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 #include <stdio.h>
  22 #include <string.h>
  23 #include <assert.h>
  24
  25 static const char *image;
  26 static volatile pthread_t main_thread;
  27 static char *argv1 = "go away";
  28
  29 static void *
  30 thread_execler (void *arg)
  31 {
  32   int i;
  33
  34   i = pthread_join (main_thread, NULL);
  35   assert (i == 0);
  36
  37   /* Exec ourselves again.  */
  38   if (execl (image, image, argv1, NULL) == -1) /* break-here */
  39     {
  40       perror ("execl");
  41       abort ();
  42     }
  43
  44   return NULL;
  45 }
  46
  47 int
  48 main (int argc, char **argv)
  49 {
  50   pthread_t thread;
  51   int i;
  52
  53   image = argv[0];
  54
  55   /* Pass "inf" as argument to keep re-execing ad infinitum, which can
  56      be useful for manual testing.  Passing any other argument exits
  57      immediately (and that's what the execl above does by
  58      default).  */
  59   if (argc == 2 && strcmp (argv[1], "inf") == 0)
  60     argv1 = argv[1];
  61   else if (argc > 1)
  62     exit (0);
  63
  64   main_thread = pthread_self ();
  65
  66   i = pthread_create (&thread, NULL, thread_execler, NULL);
  67   assert (i == 0);
  68
  69   pthread_exit (NULL);
  70   /* NOTREACHED */
  71   return 0;
  72 }