1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2009-2023 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 <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 volatile pthread_t main_thread; 27 static char *argv1 = "go away"; 28 29 static void * 30 thread_execler (void *arg) 31 { 32 int i; 33 34 i = pthread_join (main_thread, NULL); 35 assert (i == 0); 36 37 /* Exec ourselves again. */ 38 if (execl (image, image, argv1, NULL) == -1) /* break-here */ 39 { 40 perror ("execl"); 41 abort (); 42 } 43 44 return NULL; 45 } 46 47 int 48 main (int argc, char **argv) 49 { 50 pthread_t thread; 51 int i; 52 53 image = argv[0]; 54 55 /* Pass "inf" as argument to keep re-execing ad infinitum, which can 56 be useful for manual testing. Passing any other argument exits 57 immediately (and that's what the execl above does by 58 default). */ 59 if (argc == 2 && strcmp (argv[1], "inf") == 0) 60 argv1 = argv[1]; 61 else if (argc > 1) 62 exit (0); 63 64 main_thread = pthread_self (); 65 66 i = pthread_create (&thread, NULL, thread_execler, NULL); 67 assert (i == 0); 68 69 pthread_exit (NULL); 70 /* NOTREACHED */ 71 return 0; 72 } 73