commit b5e7bbe5b8e1d120d3f13f6d15b7be16d4f2e132
author WyattRiley <wyattriley@google.com> Tue Feb 19 13:19:13 2019 -0800
committer Wyatt Riley <wyattriley@google.com> Fri Mar 01 21:01:07 2019 +0000
tree c1b4fbeeac1c591a1b1dd0dfa8371b6a8ea738fb
parent ed5973b8a8a2c0f0fc1f39c59c33f81882f41405

DO NOT MERGE - SUPL ES Extension - Safer Init and Not After Boot

Safe order of pointer setting and background thread start
Verifying mCallEndElapsedRealtimeMillis is not the initial value

Bug: 112159033
Bug: 115361555
Bug: 125124724
Test: Verified not-after-boot with test code b/115361555#comment14
Test: Reproed NPE on Nexus 5x with test thread sleep and verify fix
Change-Id: I596f913bc79873274c2743132c93ef2381d9f3c7

location/java/com/android/internal/location/GpsNetInitiatedHandler.java

diff --git a/location/java/com/android/internal/location/GpsNetInitiatedHandler.java b/location/java/com/android/internal/location/GpsNetInitiatedHandler.java
index 1f9155d..aa73bc6e 100644
--- a/location/java/com/android/internal/location/GpsNetInitiatedHandler.java
+++ b/location/java/com/android/internal/location/GpsNetInitiatedHandler.java
@@ -123,8 +123,8 @@
     static private boolean mIsHexInput = true;
 
     // End time of emergency call, and extension, if set
-    private long mCallEndElapsedRealtimeMillis = 0;
-    private long mEmergencyExtensionMillis = 0;
+    private volatile long mCallEndElapsedRealtimeMillis = 0;
+    private volatile long mEmergencyExtensionMillis = 0;
 
     public static class GpsNiNotification
     {
@@ -250,8 +250,9 @@
      */
     public boolean getInEmergency() {
         boolean isInEmergencyExtension =
-                (SystemClock.elapsedRealtime() - mCallEndElapsedRealtimeMillis) <
-                        mEmergencyExtensionMillis;
+                (mCallEndElapsedRealtimeMillis > 0)
+                && ((SystemClock.elapsedRealtime() - mCallEndElapsedRealtimeMillis)
+                        < mEmergencyExtensionMillis);
         boolean isInEmergencyCallback = Boolean.parseBoolean(
                 SystemProperties.get(TelephonyProperties.PROPERTY_INECM_MODE));
         return mIsInEmergencyCall || isInEmergencyCallback || isInEmergencyExtension;

services/core/java/com/android/server/location/GnssLocationProvider.java

diff --git a/services/core/java/com/android/server/location/GnssLocationProvider.java b/services/core/java/com/android/server/location/GnssLocationProvider.java
index 64cabd9..93e041b 100644
--- a/services/core/java/com/android/server/location/GnssLocationProvider.java
+++ b/services/core/java/com/android/server/location/GnssLocationProvider.java
@@ -705,12 +705,11 @@
         // while IO initialization and registration is delegated to our internal handler
         // this approach is just fine because events are posted to our handler anyway
         mProperties = new Properties();
-        sendMessage(INITIALIZE_HANDLER, 0, null);
-
-        // Create a GPS net-initiated handler.
+        // Create a GPS net-initiated handler (also needed by handleInitialize)
         mNIHandler = new GpsNetInitiatedHandler(context,
                                                 mNetInitiatedListener,
                                                 mSuplEsEnabled);
+        sendMessage(INITIALIZE_HANDLER, 0, null);
 
         mListenerHelper = new GnssStatusListenerHelper(mHandler) {
             @Override