1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2018-2020 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 <stdlib.h> 20 21 static void 22 breakpt () 23 { 24 asm ("" ::: "memory"); 25 } 26 27 static void 28 go_child () 29 { 30 breakpt (); 31 32 while (1) 33 sleep (1); 34 } 35 36 static void 37 go_parent () 38 { 39 breakpt (); 40 41 while (1) 42 sleep (1); 43 } 44 45 int 46 main () 47 { 48 pid_t pid; 49 50 pid = fork (); 51 if (pid == -1) 52 abort (); 53 54 if (pid == 0) 55 go_child (); 56 else 57 go_parent (); 58 59 exit (EXIT_SUCCESS); 60 } 61