From ca3329ccb50e896b60072f73af41612de7115426 Mon Sep 17 00:00:00 2001
From: Philip Cuadra <philipcuadra@google.com>
Date: Fri, 24 Jun 2016 12:02:06 -0700
Subject: [PATCH] Add tracing events for system service lifecycle events

To help debug time spent on startup, add tracing events for system
service lifecycle events.

Change-Id: Icfdafe2b1fa56a2533af0cf08810ef455c20939a
---
 .../com/android/server/SystemServiceManager.java  | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/services/core/java/com/android/server/SystemServiceManager.java b/services/core/java/com/android/server/SystemServiceManager.java
index ecc69e90b7a30..90f507c146bf3 100644
--- a/services/core/java/com/android/server/SystemServiceManager.java
+++ b/services/core/java/com/android/server/SystemServiceManager.java
@@ -156,12 +156,15 @@ public class SystemServiceManager {
         final int serviceLen = mServices.size();
         for (int i = 0; i < serviceLen; i++) {
             final SystemService service = mServices.get(i);
+            Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, "onStartUser "
+                    + service.getClass().getName());
             try {
                 service.onStartUser(userHandle);
             } catch (Exception ex) {
                 Slog.wtf(TAG, "Failure reporting start of user " + userHandle
                         + " to service " + service.getClass().getName(), ex);
             }
+            Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
         }
     }
 
@@ -169,12 +172,15 @@ public class SystemServiceManager {
         final int serviceLen = mServices.size();
         for (int i = 0; i < serviceLen; i++) {
             final SystemService service = mServices.get(i);
+            Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, "onUnlockUser "
+                    + service.getClass().getName());
             try {
                 service.onUnlockUser(userHandle);
             } catch (Exception ex) {
                 Slog.wtf(TAG, "Failure reporting unlock of user " + userHandle
                         + " to service " + service.getClass().getName(), ex);
             }
+            Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
         }
     }
 
@@ -182,12 +188,15 @@ public class SystemServiceManager {
         final int serviceLen = mServices.size();
         for (int i = 0; i < serviceLen; i++) {
             final SystemService service = mServices.get(i);
+            Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, "onSwitchUser "
+                    + service.getClass().getName());
             try {
                 service.onSwitchUser(userHandle);
             } catch (Exception ex) {
                 Slog.wtf(TAG, "Failure reporting switch of user " + userHandle
                         + " to service " + service.getClass().getName(), ex);
             }
+            Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
         }
     }
 
@@ -195,12 +204,15 @@ public class SystemServiceManager {
         final int serviceLen = mServices.size();
         for (int i = 0; i < serviceLen; i++) {
             final SystemService service = mServices.get(i);
+            Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, "onStopUser "
+                    + service.getClass().getName());
             try {
                 service.onStopUser(userHandle);
             } catch (Exception ex) {
                 Slog.wtf(TAG, "Failure reporting stop of user " + userHandle
                         + " to service " + service.getClass().getName(), ex);
             }
+            Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
         }
     }
 
@@ -208,12 +220,15 @@ public class SystemServiceManager {
         final int serviceLen = mServices.size();
         for (int i = 0; i < serviceLen; i++) {
             final SystemService service = mServices.get(i);
+            Trace.traceBegin(Trace.TRACE_TAG_SYSTEM_SERVER, "onCleanupUser "
+                    + service.getClass().getName());
             try {
                 service.onCleanupUser(userHandle);
             } catch (Exception ex) {
                 Slog.wtf(TAG, "Failure reporting cleanup of user " + userHandle
                         + " to service " + service.getClass().getName(), ex);
             }
+            Trace.traceEnd(Trace.TRACE_TAG_SYSTEM_SERVER);
         }
     }