From e3d7cf7c96964f9d55116f235dc3e0cbf5fef971 Mon Sep 17 00:00:00 2001
From: Michael Klein <michael.klein@puffin.lb.shuttle.de>
Date: Sat, 8 Aug 2015 21:07:58 +0100
Subject: Cocoa: fix integer multiplication overflow in qt_gettime()

Task-number: QTBUG-24031
Change-Id: Iae00b10b6a7423508669ef173a80a03b3dd388c6
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
---
 src/corelib/tools/qelapsedtimer_mac.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/corelib/tools/qelapsedtimer_mac.cpp')

diff --git a/src/corelib/tools/qelapsedtimer_mac.cpp b/src/corelib/tools/qelapsedtimer_mac.cpp
index a355bf03e8..e946ac096f 100644
--- a/src/corelib/tools/qelapsedtimer_mac.cpp
+++ b/src/corelib/tools/qelapsedtimer_mac.cpp
@@ -59,8 +59,13 @@ static qint64 absoluteToNSecs(qint64 cpuTime)
 {
     if (info.denom == 0)
         mach_timebase_info(&info);
+#ifdef __LP64__
+    __uint128_t nsecs = static_cast<__uint128_t>(cpuTime) * info.numer / info.denom;
+    return static_cast<qint64>(nsecs);
+#else
     qint64 nsecs = cpuTime * info.numer / info.denom;
     return nsecs;
+#endif
 }
 
 static qint64 absoluteToMSecs(qint64 cpuTime)
-- 
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