commit d98885c128e7045da244098d82751da6e792d677
author Dianne Hackborn <hackbod@google.com> Tue Mar 01 17:13:03 2016 -0800
committer Dianne Hackborn <hackbod@google.com> Wed Mar 02 17:40:52 2016 -0800
tree 3bd853f18f1013e5e5eb787f4eb63784d944114d
parent 8316fac9c0772b1908d45b2286298b5b791d3ca7

Add APIs to find out the time when a process was created.

Change-Id: Id0d12c377f278fec6e31a98eab0c865a23c006ec

api/current.txt

diff --git a/api/current.txt b/api/current.txt
index aeaae55..ce7ba46 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -29104,6 +29104,8 @@
     ctor public Process();
     method public static final long getElapsedCpuTime();
     method public static final int getGidForName(java.lang.String);
+    method public static final long getStartElapsedRealtime();
+    method public static final long getStartUptimeMillis();
     method public static final int getThreadPriority(int) throws java.lang.IllegalArgumentException;
     method public static final int getUidForName(java.lang.String);
     method public static final boolean is64Bit();

api/system-current.txt

diff --git a/api/system-current.txt b/api/system-current.txt
index 1a2c854..e4f7caa 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -31396,6 +31396,8 @@
     ctor public Process();
     method public static final long getElapsedCpuTime();
     method public static final int getGidForName(java.lang.String);
+    method public static final long getStartElapsedRealtime();
+    method public static final long getStartUptimeMillis();
     method public static final int getThreadPriority(int) throws java.lang.IllegalArgumentException;
     method public static final int getUidForName(java.lang.String);
     method public static final boolean is64Bit();

api/test-current.txt

diff --git a/api/test-current.txt b/api/test-current.txt
index 1039fed..c220c6d 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -29115,6 +29115,8 @@
     ctor public Process();
     method public static final long getElapsedCpuTime();
     method public static final int getGidForName(java.lang.String);
+    method public static final long getStartElapsedRealtime();
+    method public static final long getStartUptimeMillis();
     method public static final int getThreadPriority(int) throws java.lang.IllegalArgumentException;
     method public static final int getUidForName(java.lang.String);
     method public static final boolean is64Bit();

core/java/android/app/ActivityThread.java

diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index 1e95c98..2415ce1 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -4909,6 +4909,9 @@
             DdmVmInternal.enableRecentAllocations(true);
         }
 
+        // Note when this process has started.
+        Process.setStartTimes(SystemClock.elapsedRealtime(), SystemClock.uptimeMillis());
+
         mBoundApplication = data;
         mConfiguration = new Configuration(data.config);
         mCompatConfiguration = new Configuration(data.config);

core/java/android/os/Process.java

diff --git a/core/java/android/os/Process.java b/core/java/android/os/Process.java
index 9984755..8fd3b0c 100644
--- a/core/java/android/os/Process.java
+++ b/core/java/android/os/Process.java
@@ -383,6 +383,9 @@
     public static final int SIGNAL_KILL = 9;
     public static final int SIGNAL_USR1 = 10;
 
+    private static long sStartElapsedRealtime;
+    private static long sStartUptimeMillis;
+
     /**
      * State for communicating with the zygote process.
      *
@@ -772,6 +775,26 @@
     public static final native long getElapsedCpuTime();
 
     /**
+     * Return the {@link SystemClock#elapsedRealtime()} at which this process was started.
+     */
+    public static final long getStartElapsedRealtime() {
+        return sStartElapsedRealtime;
+    }
+
+    /**
+     * Return the {@link SystemClock#uptimeMillis()} at which this process was started.
+     */
+    public static final long getStartUptimeMillis() {
+        return sStartUptimeMillis;
+    }
+
+    /** @hide */
+    public static final void setStartTimes(long elapsedRealtime, long uptimeMillis) {
+        sStartElapsedRealtime = elapsedRealtime;
+        sStartUptimeMillis = uptimeMillis;
+    }
+
+    /**
      * Returns true if the current process is a 64-bit runtime.
      */
     public static final boolean is64Bit() {