Merge "Synchronize access to WebViewZygote." (c8111e07) · Commits · e / os / android_frameworks_base

core/java/android/webkit/WebViewZygote.java

+77 −40

Original line number	Diff line number	Diff line
		@@ -24,6 +24,8 @@ import android.os.ZygoteProcess;
		import android.text.TextUtils;
		import android.util.Log;

		import com.android.internal.annotations.GuardedBy;

		import java.io.File;
		import java.io.IOException;
		import java.util.ArrayList;
		@@ -38,33 +40,59 @@ public class WebViewZygote {
		private static final String WEBVIEW_ZYGOTE_SERVICE_32 = "webview_zygote32";
		private static final String WEBVIEW_ZYGOTE_SERVICE_64 = "webview_zygote64";

		/**
		* Lock object that protects all other static members.
		*/
		private static final Object sLock = new Object();

		/**
		* Instance that maintains the socket connection to the zygote. This is null if the zygote
		* is not running or is not connected.
		*/
		@GuardedBy("sLock")
		private static ZygoteProcess sZygote;

		/**
		* Information about the selected WebView package. This is set from #onWebViewProviderChanged().
		*/
		@GuardedBy("sLock")
		private static PackageInfo sPackage;

		/**
		* Flag for whether multi-process WebView is enabled. If this is false, the zygote
		* will not be started.
		*/
		@GuardedBy("sLock")
		private static boolean sMultiprocessEnabled = false;

		public static ZygoteProcess getProcess() {
		connectToZygoteIfNeeded();
		synchronized (sLock) {
		connectToZygoteIfNeededLocked();
		return sZygote;
		}
		}

		public static String getPackageName() {
		synchronized (sLock) {
		return sPackage.packageName;
		}
		}

		public static boolean isMultiprocessEnabled() {
		synchronized (sLock) {
		return sMultiprocessEnabled && sPackage != null;
		}
		}

		public static void setMultiprocessEnabled(boolean enabled) {
		synchronized (sLock) {
		sMultiprocessEnabled = enabled;

		// When toggling between multi-process being on/off, start or stop the
		// service. If it is enabled and the zygote is not yet started, bring up the service.
		// Otherwise, bring down the service. The name may be null if the package
		// information has not yet been resolved.
		final String serviceName = getServiceName();
		final String serviceName = getServiceNameLocked();
		if (serviceName == null) return;

		if (enabled && sZygote == null) {
		@@ -74,8 +102,11 @@ public class WebViewZygote {
		sZygote = null;
		}
		}
		}

		public static void onWebViewProviderChanged(PackageInfo packageInfo) {
		String serviceName;
		synchronized (sLock) {
		sPackage = packageInfo;

		// If multi-process is not enabled, then do not start the zygote service.
		@@ -83,11 +114,14 @@ public class WebViewZygote {
		return;
		}

		final String serviceName = getServiceName();
		serviceName = getServiceNameLocked();
		sZygote = null;

		// The service may enter the RUNNING state before it opens the socket,
		// so connectToZygoteIfNeededLocked() may still fail.
		if (SystemService.isStopped(serviceName)) {
		SystemService.start(serviceName);
		} else if (sZygote != null) {
		} else {
		SystemService.restart(serviceName);
		}

		@@ -98,10 +132,12 @@ public class WebViewZygote {
		return;
		}

		connectToZygoteIfNeeded();
		connectToZygoteIfNeededLocked();
		}
		}

		private static String getServiceName() {
		@GuardedBy("sLock")
		private static String getServiceNameLocked() {
		if (sPackage == null)
		return null;

		@@ -113,7 +149,8 @@ public class WebViewZygote {
		return WEBVIEW_ZYGOTE_SERVICE_32;
		}

		private static void connectToZygoteIfNeeded() {
		@GuardedBy("sLock")
		private static void connectToZygoteIfNeededLocked() {
		if (sZygote != null)
		return;

		@@ -122,7 +159,7 @@ public class WebViewZygote {
		return;
		}

		final String serviceName = getServiceName();
		final String serviceName = getServiceNameLocked();
		if (!SystemService.isRunning(serviceName)) {
		Log.e(LOGTAG, serviceName + " is not running");
		return;