| 1 | /* |
| 2 | * lttng-malloc-stats.c |
| 3 | * |
| 4 | * LTTng malloc stats printer |
| 5 | * |
| 6 | * Copyright (c) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | * |
| 8 | * This library is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This library is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with this library; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | #define _GNU_SOURCE |
| 24 | #include <malloc.h> |
| 25 | #include <stdio.h> |
| 26 | #include <assert.h> |
| 27 | #include <signal.h> |
| 28 | |
| 29 | #define STAT_SIGNAL SIGUSR2 |
| 30 | |
| 31 | /* Signal handler */ |
| 32 | static void sighandler(int signo, siginfo_t *siginfo, void *context) |
| 33 | { |
| 34 | malloc_stats(); |
| 35 | } |
| 36 | |
| 37 | static __attribute__((constructor)) |
| 38 | void print_stats_init(void) |
| 39 | { |
| 40 | /* Attach signal handler on STAT_SIGNAL */ |
| 41 | struct sigaction act; |
| 42 | int ret; |
| 43 | |
| 44 | act.sa_sigaction = sighandler; |
| 45 | act.sa_flags = SA_SIGINFO | SA_RESTART; |
| 46 | sigemptyset(&act.sa_mask); |
| 47 | ret = sigaction(STAT_SIGNAL, &act, NULL); |
| 48 | assert(!ret); |
| 49 | } |