1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2009-2016 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 Test that GDB doesn't lose an event for a thread it didn't know 19 about, until an event is reported for it. */ 20 21 #define _GNU_SOURCE 22 #include <sched.h> 23 #include <assert.h> 24 #include <stdlib.h> 25 #include <signal.h> 26 #include <sys/types.h> 27 #include <unistd.h> 28 #include <sys/syscall.h> 29 30 #include <features.h> 31 #ifdef __UCLIBC__ 32 #if !(defined(__UCLIBC_HAS_MMU__) || defined(__ARCH_HAS_MMU__)) 33 #define HAS_NOMMU 34 #endif 35 #endif 36 37 #define STACK_SIZE 0x1000 38 39 static int 40 tkill (int lwpid, int signo) 41 { 42 return syscall (__NR_tkill, lwpid, signo); 43 } 44 45 static pid_t 46 gettid (void) 47 { 48 return syscall (__NR_gettid); 49 } 50 51 static int 52 fn (void *unused) 53 { 54 tkill (gettid (), SIGUSR1); 55 return 0; 56 } 57 58 int 59 main (int argc, char **argv) 60 { 61 unsigned char *stack; 62 int new_pid; 63 64 stack = malloc (STACK_SIZE); 65 assert (stack != NULL); 66 67 new_pid = clone (fn, stack + STACK_SIZE, CLONE_FILES 68 #if defined(__UCLIBC__) && defined(HAS_NOMMU) 69 | CLONE_VM 70 #endif /* defined(__UCLIBC__) && defined(HAS_NOMMU) */ 71 , NULL, NULL, NULL, NULL); 72 assert (new_pid > 0); 73 74 return 0; 75 } 76