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1c353010 DG |
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 | } |