gdb/testsuite/gdb.threads/non-ldr-exc-1.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2009-2017 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 char *argv1 = "go away";
  27
  28 static void *
  29 thread_execler (void *arg)
  30 {
  31   /* Exec ourselves again.  */
  32   if (execl (image, image, argv1, NULL) == -1) /* break-here */
  33     {
  34       perror ("execl");
  35       abort ();
  36     }
  37
  38   return NULL;
  39 }
  40
  41 int
  42 main (int argc, char **argv)
  43 {
  44   pthread_t thread;
  45   int i;
  46
  47   image = argv[0];
  48
  49   /* Pass "inf" as argument to keep re-execing ad infinitum, which can
  50      be useful for manual testing.  Passing any other argument exits
  51      immediately (and that's what the execl above does by
  52      default).  */
  53   if (argc == 2 && strcmp (argv[1], "inf") == 0)
  54     argv1 = argv[1];
  55   else if (argc > 1)
  56     exit (0);
  57
  58   i = pthread_create (&thread, NULL, thread_execler, NULL);
  59   assert (i == 0);
  60   pthread_join (thread, NULL);
  61
  62   return 0;
  63 }