commit 721b7a0dac6ede81d1d7de8ff490fdcedb3d2aab
author Ray Essick <essick@google.com> Mon Sep 11 09:33:56 2017 -0700
committer Ray Essick <essick@google.com> Mon Sep 11 09:33:56 2017 -0700
tree 5468632f04ca669aec6eff6a487e51a924bb3932
parent c75d97f20843388b9084561635996a01a53d0c0f

Blur media.metrics timestamps for privacy

Privacy workgroup recommended that we blur timestamps to
further improve anonymity of metrics records.

Bug: 65539819
Test: examination of dumpsys media.metrics
Change-Id: I337a66a66df733b4ece222b5b69a5732e78a3e35

services/mediaanalytics/MediaAnalyticsService.cpp

diff --git a/services/mediaanalytics/MediaAnalyticsService.cpp b/services/mediaanalytics/MediaAnalyticsService.cpp
index 2443301..763b937 100644
--- a/services/mediaanalytics/MediaAnalyticsService.cpp
+++ b/services/mediaanalytics/MediaAnalyticsService.cpp
@@ -222,6 +222,8 @@
 
     // we control these, generally not trusting user input
     nsecs_t now = systemTime(SYSTEM_TIME_REALTIME);
+    // round nsecs to seconds
+    now = ((now + 500000000) / 1000000000) * 1000000000;
     item->setTimestamp(now);
     int pid = IPCThreadState::self()->getCallingPid();
     int uid = IPCThreadState::self()->getCallingUid();