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Add runtime restart information to sysprops and eventlog

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Added 3 more system props:
- sys.system_server.start_count
How many times the system server has started, 1-based.

- sys.system_server.start_elapsed
Elapsed time when the system server started most recently

- sys.system_server.start_uptime
Uptime when the system server started most recently

Also log the same information on event log, as 'system_server_start'.

Bug: 124022170
Test: manual
$ adb logcat -b events -s system_server_start
02-15 23:35:06.151  1222  1222 I system_server_start: [1,4714,4714]
 (killed the system server)
02-15 23:35:24.673  4209  4209 I system_server_start: [2,23236,23236]

$ getprop | grep system_server
[sys.system_server.start_count]: [2]
[sys.system_server.start_elapsed]: [23236]
[sys.system_server.start_uptime]: [23236]

Change-Id: Ie3e77903e723eb5b7e79b545d4287d9b07c4b379
This commit is contained in:
Makoto Onuki
2019-02-15 15:22:04 -08:00
parent 32981ff4d4
commit b4739d9d14
2 changed files with 24 additions and 3 deletions
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25
services/java/com/android/server/SystemServer.java
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@@ -308,6 +308,7 @@ public final class SystemServer {
private boolean mOnlyCore;
private boolean mFirstBoot;
private final int mStartCount;
private final boolean mRuntimeRestart;
private final long mRuntimeStartElapsedTime;
private final long mRuntimeStartUptime;
@@ -315,6 +316,9 @@ public final class SystemServer {
private static final String START_SENSOR_SERVICE = "StartSensorService";
private static final String START_HIDL_SERVICES = "StartHidlServices";
private static final String SYSPROP_START_COUNT = "sys.system_server.start_count";
private static final String SYSPROP_START_ELAPSED = "sys.system_server.start_elapsed";
private static final String SYSPROP_START_UPTIME = "sys.system_server.start_uptime";
private Future<?> mSensorServiceStart;
private Future<?> mZygotePreload;
@@ -344,16 +348,33 @@ public final class SystemServer {
public SystemServer() {
// Check for factory test mode.
mFactoryTestMode = FactoryTest.getMode();
// Remember if it's runtime restart(when sys.boot_completed is already set) or reboot
mRuntimeRestart = "1".equals(SystemProperties.get("sys.boot_completed"));
// Record process start information.
// Note SYSPROP_START_COUNT will increment by *2* on a FDE device when it fully boots;
// one for the password screen, second for the actual boot.
mStartCount = SystemProperties.getInt(SYSPROP_START_COUNT, 0) + 1;
mRuntimeStartElapsedTime = SystemClock.elapsedRealtime();
mRuntimeStartUptime = SystemClock.uptimeMillis();
// Remember if it's runtime restart(when sys.boot_completed is already set) or reboot
// We don't use "mStartCount > 1" here because it'll be wrong on a FDE device.
// TODO: mRuntimeRestart will *not* be set to true if the proccess crashes before
// sys.boot_completed is set. Fix it.
mRuntimeRestart = "1".equals(SystemProperties.get("sys.boot_completed"));
}
private void run() {
try {
traceBeginAndSlog("InitBeforeStartServices");
// Record the process start information in sys props.
SystemProperties.set(SYSPROP_START_COUNT, String.valueOf(mStartCount));
SystemProperties.set(SYSPROP_START_ELAPSED, String.valueOf(mRuntimeStartElapsedTime));
SystemProperties.set(SYSPROP_START_UPTIME, String.valueOf(mRuntimeStartUptime));
EventLog.writeEvent(EventLogTags.SYSTEM_SERVER_START,
mStartCount, mRuntimeStartUptime, mRuntimeStartElapsedTime);
// If a device's clock is before 1970 (before 0), a lot of
// APIs crash dealing with negative numbers, notably
// java.io.File#setLastModified, so instead we fake it and