From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Wed, 1 Jun 2011 22:59:45 +0000 (-0400)
Subject: Fix syscall tracing argument input
X-Git-Tag: v2.0-pre1~67
X-Git-Url: http://git.lttng.org/?a=commitdiff_plain;h=8b849768eb60b4822725018261eebd7f67c454b2;p=lttng-modules.git

Fix syscall tracing argument input

The probe code was jumping over the argument read.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/instrumentation/events/lttng-module/syscalls.h b/instrumentation/events/lttng-module/syscalls.h
index 182be763..a2bb9563 100644
--- a/instrumentation/events/lttng-module/syscalls.h
+++ b/instrumentation/events/lttng-module/syscalls.h
@@ -31,10 +31,13 @@ TRACE_EVENT(sys_enter,
 	TP_fast_assign(
 		tp_assign(id, id)
 		{
-			unsigned long args_copy[6];
-
-			syscall_get_arguments(current, regs, 0, 6, args_copy);
-			tp_memcpy(args, args_copy, sizeof(args_copy));
+			tp_memcpy(args,
+				({
+					unsigned long args_copy[6];
+					syscall_get_arguments(current, regs,
+							0, 6, args_copy);
+					args_copy;
+				}), 6 * sizeof(unsigned long));
 		}
 	),