[memleak] Add memleak directory and script to start program with it

[lttng-tools.git] / memleak / lttng-malloc-stats.c

diff --git a/memleak/lttng-malloc-stats.c b/memleak/lttng-malloc-stats.c
new file mode 100644 (file)
index 0000000..7811ea6
--- /dev/null
+++ b/memleak/lttng-malloc-stats.c
@@ -0,0 +1,49 @@
+/*
+ * lttng-malloc-stats.c
+ *
+ * LTTng malloc stats printer
+ *
+ * Copyright (c) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#define _GNU_SOURCE
+#include <malloc.h>
+#include <stdio.h>
+#include <assert.h>
+#include <signal.h>
+
+#define STAT_SIGNAL    SIGUSR2
+
+/* Signal handler */
+static void sighandler(int signo, siginfo_t *siginfo, void *context)
+{
+       malloc_stats();
+}
+
+static __attribute__((constructor))
+void print_stats_init(void)
+{
+       /* Attach signal handler on STAT_SIGNAL */
+       struct sigaction act;
+       int ret;
+
+       act.sa_sigaction = sighandler;
+       act.sa_flags = SA_SIGINFO | SA_RESTART;
+       sigemptyset(&act.sa_mask);
+       ret = sigaction(STAT_SIGNAL, &act, NULL);
+       assert(!ret);
+}