gdb/testsuite/gdb.multi/multi-arch-exec.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2012-2022 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 <stdlib.h>
  19 #include <stdio.h>
  20 #include <unistd.h>
  21 #include <limits.h>
  22 #include <string.h>
  23 #include <pthread.h>
  24
  25 #define NUM_THREADS 1
  26
  27 static pthread_barrier_t barrier;
  28
  29 static void *
  30 thread_start (void *arg)
  31 {
  32   pthread_barrier_wait (&barrier);
  33   pthread_barrier_wait (&barrier);
  34   pthread_barrier_wait (&barrier);
  35
  36   while (1)
  37     sleep (1);
  38   return NULL;
  39 }
  40
  41 static void
  42 all_started (void)
  43 {
  44 }
  45
  46 int
  47 main (int argc, char ** argv)
  48 {
  49   char prog[PATH_MAX];
  50   pthread_t thread;
  51   int len;
  52
  53   strcpy (prog, argv[0]);
  54   len = strlen (prog);
  55   /* Replace "multi-arch-exec" with "multi-arch-exec-hello".  */
  56   memcpy (prog + len - 15, "multi-arch-exec-hello", 21);
  57   prog[len + 6] = 0;
  58
  59   pthread_barrier_init (&barrier, NULL, NUM_THREADS + 1);
  60   pthread_create (&thread, NULL, thread_start, NULL);
  61
  62   pthread_barrier_wait (&barrier);
  63   all_started ();
  64
  65   /* Avoid races with GDB ptrace-resuming the threads and the exec: ensure
  66      both threads were resumed by GDB before going into the exec.  */
  67   pthread_barrier_wait (&barrier);
  68   pthread_barrier_wait (&barrier);
  69
  70   execl (prog,
  71          prog,
  72          (char *) NULL);
  73   perror ("execl failed");
  74   exit (1);
  75 }