| 1 | /* |
| 2 | * Copyright (C) 2009 Pierre-Marc Fournier |
| 3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 4 | * |
| 5 | * This library is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU Lesser General Public |
| 7 | * License as published by the Free Software Foundation; version 2.1 of |
| 8 | * the License. |
| 9 | * |
| 10 | * This library 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 GNU |
| 13 | * Lesser General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Lesser General Public |
| 16 | * License along with this library; if not, write to the Free Software |
| 17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | */ |
| 19 | |
| 20 | #include <stdio.h> |
| 21 | #include <unistd.h> |
| 22 | #include <sys/mman.h> |
| 23 | #include <stdarg.h> |
| 24 | #include <sys/types.h> |
| 25 | #include <sys/stat.h> |
| 26 | #include <fcntl.h> |
| 27 | #include <signal.h> |
| 28 | |
| 29 | #include "usterr.h" |
| 30 | #include "tp.h" |
| 31 | |
| 32 | void inthandler(int sig) |
| 33 | { |
| 34 | printf("in SIGUSR1 handler\n"); |
| 35 | tracepoint(ust_tests_hello_tptest_sighandler); |
| 36 | } |
| 37 | |
| 38 | int init_int_handler(void) |
| 39 | { |
| 40 | int result; |
| 41 | struct sigaction act; |
| 42 | |
| 43 | result = sigemptyset(&act.sa_mask); |
| 44 | if (result == -1) { |
| 45 | PERROR("sigemptyset"); |
| 46 | return -1; |
| 47 | } |
| 48 | |
| 49 | act.sa_handler = inthandler; |
| 50 | act.sa_flags = SA_RESTART; |
| 51 | |
| 52 | /* Only defer ourselves. Also, try to restart interrupted |
| 53 | * syscalls to disturb the traced program as little as possible. |
| 54 | */ |
| 55 | result = sigaction(SIGUSR1, &act, NULL); |
| 56 | if (result == -1) { |
| 57 | PERROR("sigaction"); |
| 58 | return -1; |
| 59 | } |
| 60 | |
| 61 | return 0; |
| 62 | } |
| 63 | |
| 64 | int main(int argc, char **argv) |
| 65 | { |
| 66 | int i; |
| 67 | |
| 68 | init_int_handler(); |
| 69 | |
| 70 | printf("Hello, World!\n"); |
| 71 | |
| 72 | sleep(1); |
| 73 | |
| 74 | for (i = 0; i < 50; i++) { |
| 75 | tracepoint(ust_tests_hello_tptest, i); |
| 76 | usleep(100000); |
| 77 | } |
| 78 | return 0; |
| 79 | } |