From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Tue, 13 Mar 2012 20:11:37 +0000 (-0400)
Subject: Fix clock offset 32-bit multiplication overflow
X-Git-Tag: v2.0.0-rc4~3
X-Git-Url: http://git.lttng.org/?p=lttng-modules.git;a=commitdiff_plain;h=57be518d19d7c433f79c57cd7815160110ac19c2

Fix clock offset 32-bit multiplication overflow

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

diff --git a/lttng-events.c b/lttng-events.c
index ea6c116f..2fedbea5 100644
--- a/lttng-events.c
+++ b/lttng-events.c
@@ -887,7 +887,7 @@ uint64_t measure_clock_offset(void)
 	local_irq_restore(flags);
 
 	offset = (monotonic[0] + monotonic[1]) >> 1;
-	realtime = rts.tv_sec * NSEC_PER_SEC;
+	realtime = (uint64_t) rts.tv_sec * NSEC_PER_SEC;
 	realtime += rts.tv_nsec;
 	offset = realtime - offset;
 	return offset;