From: Francis Giraldeau <francis.giraldeau@usherbrooke.ca>
Date: Wed, 18 May 2011 20:25:15 +0000 (-0400)
Subject: Add dup probe to lttng module
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=ac04388fc5abb5239519a4588359b36860c73080;p=lttng-modules.git

Add dup probe to lttng module

This patch provides instrumentation for dup system call. It records the
oldfd and newfd if the operation succeed. This is required to recover in
the trace tre fd that newfd reference to.

Signed-off-by: Francis Giraldeau <francis.giraldeau@usherbrooke.ca>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/probes/fs-trace.c b/probes/fs-trace.c
index ccfc2820..4635c881 100644
--- a/probes/fs-trace.c
+++ b/probes/fs-trace.c
@@ -153,6 +153,12 @@ void probe_fs_poll(void *_data, int fd)
 		"fd %d", fd);
 }
 
+void probe_fs_dup(void *_data, unsigned int oldfd, unsigned int newfd)
+{
+	trace_mark_tp(fs, dup, fs_dup, probe_fs_dup,
+		"oldfd %d newfd %d", oldfd, newfd);
+}
+
 MODULE_LICENSE("GPL and additional rights");
 MODULE_AUTHOR("Mathieu Desnoyers");
 MODULE_DESCRIPTION("FS Tracepoint Probes");