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

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2009-2012 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 <assert.h>
  22
  23 static const char *image;
  24 static volatile pthread_t main_thread;
  25 static char *argv1 = "go away";
  26
  27 static void *
  28 thread_execler (void *arg)
  29 {
  30   int i;
  31
  32   i = pthread_join (main_thread, NULL);
  33   assert (i == 0);
  34
  35   /* Exec ourselves again.  */
  36   if (execl (image, image, argv1, NULL) == -1) /* break-here */
  37     {
  38       perror ("execl");
  39       abort ();
  40     }
  41
  42   return NULL;
  43 }
  44
  45 int
  46 main (int argc, char **argv)
  47 {
  48   pthread_t thread;
  49   int i;
  50
  51   image = argv[0];
  52
  53   /* Pass "inf" as argument to keep re-execing ad infinitum, which can
  54      be useful for manual testing.  Passing any other argument exits
  55      immediately (and that's what the execl above does by
  56      default).  */
  57   if (argc == 2 && strcmp (argv[1], "inf") == 0)
  58     argv1 = argv[1];
  59   else if (argc > 1)
  60     exit (0);
  61
  62   main_thread = pthread_self ();
  63
  64   i = pthread_create (&thread, NULL, thread_execler, NULL);
  65   assert (i == 0);
  66
  67   pthread_exit (NULL);
  68   /* NOTREACHED */
  69   return 0;
  70 }