tdf#128715 fix tools::Time::GetMonotonicTicks() on 32-bit linux

Since time_t and thus tv_sec is (still, for now) 32-bit on these
architechtures, the multiplication of seconds to microseconds
happened in 32-bit thus causing a rollover roughly every 4295 seconds.
Fix by casting tv_sec to sal_uInt64 before the multiplication.

Also fixes tdf#144975.

Change-Id: I829d3406208545a816979cb58daaeb99ec2d5294
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/126379
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
(cherry picked from commit 7fa9b09bc271d91792fe78c5cb03430bf38155a8)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/126305
(cherry picked from commit 18407807085e47f56ec972c2e1ce6db9a2375e21)
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/126434
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/tools/source/datetime/ttime.cxx b/tools/source/datetime/ttime.cxx
index 0049c33efd9d..e1fdc25615d2 100644
--- a/tools/source/datetime/ttime.cxx
+++ b/tools/source/datetime/ttime.cxx
@@ -476,11 +476,12 @@ sal_uInt64 tools::Time::GetMonotonicTicks()
 #if defined(USE_CLOCK_GETTIME)
     struct timespec currentTime;
     clock_gettime( CLOCK_MONOTONIC, &currentTime );
-    nMicroSeconds = currentTime.tv_sec * 1000 * 1000 + currentTime.tv_nsec / 1000;
+    nMicroSeconds
+        = static_cast<sal_uInt64>(currentTime.tv_sec) * 1000 * 1000 + currentTime.tv_nsec / 1000;
 #else
     struct timeval currentTime;
     gettimeofday( &currentTime, nullptr );
-    nMicroSeconds = currentTime.tv_sec * 1000 * 1000 + currentTime.tv_usec;
+    nMicroSeconds = static_cast<sal_uInt64>(currentTime.tv_sec) * 1000 * 1000 + currentTime.tv_usec;
 #endif
 #endif // __MACH__
     return nMicroSeconds;