1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2020-2023 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 <unistd.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 #include <pthread.h> 23 24 #include "../lib/my-syscalls.h" 25 26 #if (!defined(LEADER_DOES_EXEC) && !defined(OTHER_DOES_EXEC) \ 27 || defined(LEADER_DOES_EXEC) && defined(OTHER_DOES_EXEC)) 28 # error "Exactly one of LEADER_DOES_EXEC and OTHER_DOES_EXEC must be defined." 29 #endif 30 31 32 static char *argv0; 33 static pthread_barrier_t barrier; 34 35 static void 36 do_the_exec (void) 37 { 38 char *execd_path = (char *) malloc (strlen (argv0) + sizeof ("-execd")); 39 sprintf (execd_path, "%s-execd", argv0); 40 char *argv[] = { execd_path, NULL }; 41 42 printf ("Exec-ing %s\n", execd_path); 43 44 extern char **environ; 45 my_execve (execd_path, argv, environ); 46 47 printf ("Exec failed :(\n"); 48 abort (); 49 } 50 51 static void * 52 thread_func (void *arg) 53 { 54 pthread_barrier_wait (&barrier); 55 #ifdef OTHER_DOES_EXEC 56 printf ("Other going in exec.\n"); 57 do_the_exec (); 58 #endif 59 60 /* Just make sure the thread does not exit when the leader does the exec. */ 61 pthread_barrier_wait (&barrier); 62 63 return NULL; 64 } 65 66 int 67 main (int argc, char *argv[]) 68 { 69 argv0 = argv[0]; 70 71 int ret = pthread_barrier_init (&barrier, NULL, 2); 72 if (ret != 0) 73 abort (); 74 75 pthread_t thread; 76 ret = pthread_create (&thread, NULL, thread_func, argv[0]); 77 if (ret != 0) 78 abort (); 79 80 pthread_barrier_wait (&barrier); 81 82 #ifdef LEADER_DOES_EXEC 83 printf ("Leader going in exec.\n"); 84 do_the_exec (); 85 #endif 86 87 pthread_join (thread, NULL); 88 89 return 0; 90 } 91