From bde9bc36353554c08fa14a0824842e48a64998c6 Mon Sep 17 00:00:00 2001
From: Collin Fijalkovich <cfijalkovich@google.com>
Date: Thu, 18 Feb 2021 13:18:10 -0800
Subject: [PATCH] Avoid TransferPipe for local dumpCacheInfo calls

Make a process-local call to PropertyInvalidatedCache instead of dumping
cache state through a TransferPipe to avoid blocking when the pipe
buffer fills.

Bug: 180051995
Test: Ran dumpsys cacheinfo and validated output
Change-Id: I1e4ab8e1d09b98b379d81079fd26ff2129b5b65a
---
 .../java/com/android/server/am/ActivityManagerService.java   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index 9382e1aa2a9e3..f6fbfeed2b0fc 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -172,6 +172,7 @@ import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.app.ProcessMemoryState;
 import android.app.ProfilerInfo;
+import android.app.PropertyInvalidatedCache;
 import android.app.WaitResult;
 import android.app.backup.BackupManager.OperationType;
 import android.app.backup.IBackupManager;
@@ -9835,6 +9836,10 @@ public class ActivityManagerService extends IActivityManager.Stub
             if (thread != null) {
                 pw.println("\n\n** Cache info for pid " + pid + " [" + r.processName + "] **");
                 pw.flush();
+                if (pid == MY_PID) {
+                    PropertyInvalidatedCache.dumpCacheInfo(fd, args);
+                    continue;
+                }
                 try {
                     TransferPipe tp = new TransferPipe();
                     try {