1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2010-2019 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 <assert.h> 20 #include <signal.h> 21 22 #include <asm/unistd.h> 23 #include <unistd.h> 24 #define tgkill(tgid, tid, sig) syscall (__NR_tgkill, (tgid), (tid), (sig)) 25 #define gettid() syscall (__NR_gettid) 26 27 static volatile int var; 28 29 static void 30 handler (int signo) /* step-0 */ 31 { /* step-0 */ 32 var++; /* step-1 */ 33 tgkill (getpid (), gettid (), SIGUSR1); /* step-2 */ 34 } 35 36 static void * 37 start (void *arg) 38 { 39 tgkill (getpid (), gettid (), SIGUSR1); 40 assert (0); 41 return NULL; 42 } 43 44 int 45 main (void) 46 { 47 pthread_t thread; 48 49 signal (SIGUSR1, handler); 50 51 pthread_create (&thread, NULL, start, NULL); 52 start (NULL); /* main-start */ 53 return 0; 54 } 55