Add System.runFinalization() call

Lone calls to System.gc() generally don't do anything.
Runtime.getRuntime().gc() would force a GC, but it would be ineffective
without waiting for reference processing and finalization to complete.
Adding the runFinalization() call implicitly makes the preceding GC call
effective.

Bug: 183912710
Test: Treehugger
Change-Id: I0f4806b8e3f9ca898eb7ea1b1c8de14aa94e2646
Merged-In: I0f4806b8e3f9ca898eb7ea1b1c8de14aa94e2646

1 files changed, 1 insertions, 0 deletions

diff --git a/services/java/com/android/server/SystemServer.java b/services/java/com/android/server/SystemServer.java
index d487483cfb56..91d4f7e2a24d 100644
--- a/services/java/com/android/server/SystemServer.java
+++ b/services/java/com/android/server/SystemServer.java
@@ -552,6 +552,7 @@ public final class SystemServer implements Dumpable {
                 if (maxFd > enableThreshold) {
                     // Do a manual GC to clean up fds that are hanging around as garbage.
                     System.gc();
+                    System.runFinalization();
                     maxFd = getMaxFd();
                 }