Implement liblttng-ust-cyg-profile function entry/exit instrumentation

[lttng-ust.git] / liblttng-ust-cyg-profile / lttng-ust-cyg-profile.c

diff --git a/liblttng-ust-cyg-profile/lttng-ust-cyg-profile.c b/liblttng-ust-cyg-profile/lttng-ust-cyg-profile.c
new file mode 100644 (file)
index 0000000..d772e76
--- /dev/null
+++ b/liblttng-ust-cyg-profile/lttng-ust-cyg-profile.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011-2013  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 <dlfcn.h>
+#include <sys/types.h>
+#include <stdio.h>
+
+#define TRACEPOINT_DEFINE
+#define TRACEPOINT_CREATE_PROBES
+#include "lttng-ust-cyg-profile.h"
+
+void __cyg_profile_func_enter(void *this_fn, void *call_site)
+       __attribute__((no_instrument_function));
+
+void __cyg_profile_func_exit(void *this_fn, void *call_site)
+       __attribute__((no_instrument_function));
+
+void __cyg_profile_func_enter(void *this_fn, void *call_site)
+{
+       tracepoint(lttng_ust_cyg_profile, func_entry, this_fn);
+}
+
+void __cyg_profile_func_exit(void *this_fn, void *call_site)
+{
+       tracepoint(lttng_ust_cyg_profile, func_exit);
+}