gdb/testsuite/gdb.threads/next-fork-exec-other-thread.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2023-2024 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 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21 #include <fcntl.h>
  22 #include <errno.h>
  23 #include <unistd.h>
  24 #include <pthread.h>
  25 #include <sys/wait.h>
  26
  27 #define MAX_LOOP_ITER 10000
  28
  29 static char *argv0;
  30
  31 static void*
  32 worker_a (void *pArg)
  33 {
  34   int iter = 0;
  35   char *args[] = {argv0, "self-call", NULL };
  36
  37   while (iter++ < MAX_LOOP_ITER)
  38     {
  39       pid_t pid = FORK_FUNC ();
  40       if (pid == 0)
  41         {
  42           /* child */
  43           if (execvp (args[0], args) == -1)
  44             {
  45               fprintf (stderr, "execvp error: %d\n", errno);
  46               exit (1);
  47             }
  48         }
  49
  50       waitpid (pid, NULL, 0);
  51       usleep (5);
  52     }
  53
  54   return NULL;
  55 }
  56
  57 static void*
  58 worker_b (void *pArg)
  59 {
  60   int iter = 0;
  61   while (iter++ < MAX_LOOP_ITER)  /* for loop */
  62     {
  63       usleep (5);  /* break here */
  64       usleep (5);  /* other line */
  65     }
  66
  67   return NULL;
  68 }
  69
  70 int
  71 main (int argc, char **argv)
  72 {
  73   pthread_t wa_pid;
  74   pthread_t wb_pid;
  75
  76   argv0 = argv[0];
  77
  78   if (argc > 1 && strcmp (argv[1], "self-call") == 0)
  79     exit (0);
  80
  81   pthread_create (&wa_pid, NULL, worker_a, NULL);
  82   pthread_create (&wb_pid, NULL, worker_b, NULL);
  83   pthread_join (wa_pid, NULL);
  84
  85   exit (0);
  86 }