Merge "Prevent system server dump stuck by pipe buffer full."

core/java/android/app/ActivityThread.java

@@ -1061,14 +1061,29 @@ public final class ActivityThread {
             WindowManagerGlobal.getInstance().dumpGfxInfo(fd);
         }
 
-        @Override
-        public void dumpDbInfo(FileDescriptor fd, String[] args) {
+        private void dumpDatabaseInfo(FileDescriptor fd, String[] args) {
             PrintWriter pw = new FastPrintWriter(new FileOutputStream(fd));
             PrintWriterPrinter printer = new PrintWriterPrinter(pw);
             SQLiteDebug.dump(printer, args);
             pw.flush();
         }
 
+        @Override
+        public void dumpDbInfo(final FileDescriptor fd, final String[] args) {
+            if (mSystemThread) {
+                // Ensure this invocation is asynchronous to prevent
+                // writer waiting due to buffer cannot be consumed.
+                AsyncTask.THREAD_POOL_EXECUTOR.execute(new Runnable() {
+                    @Override
+                    public void run() {
+                        dumpDatabaseInfo(fd, args);
+                    }
+                });
+            } else {
+                dumpDatabaseInfo(fd, args);
+            }
+        }
+
         @Override
         public void unstableProviderDied(IBinder provider) {
             sendMessage(H.UNSTABLE_PROVIDER_DIED, provider);