Refactor ZygoteInit to support a WebView-specific zygote.
This is a non-functional change that separates out functionality
that should be shared between the system zygote and the WebView
zygote from that which is system zygote specific.
* Move MethodAndArgsCaller to Zygote.
* Split out server socket functions into ZygoteServer.
* Add a new (stub, for now) WebViewZygoteInit class.
Bug: 22084679
Bug: 21643067
(cherry picked from commit ba816e0c9efd8cd2aeef618a819a2ad46b742f87)
Merged-In: I4c508a42af7ab7b53d10570ad53b846df7782cc4
Change-Id: I54f04c03443d10dabe6426697d1ff8a0cc66b985
diff --git a/core/java/com/android/internal/os/Zygote.java b/core/java/com/android/internal/os/Zygote.java
index 66cc975..fc0ccb7 100644
--- a/core/java/com/android/internal/os/Zygote.java
+++ b/core/java/com/android/internal/os/Zygote.java
@@ -22,6 +22,9 @@
import android.system.ErrnoException;
import android.system.Os;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
/** @hide */
public final class Zygote {
/*
@@ -191,4 +194,39 @@
command.append(" '").append(arg.replace("'", "'\\''")).append("'");
}
}
+
+ /**
+ * Helper exception class which holds a method and arguments and
+ * can call them. This is used as part of a trampoline to get rid of
+ * the initial process setup stack frames.
+ */
+ public static class MethodAndArgsCaller extends Exception
+ implements Runnable {
+ /** method to call */
+ private final Method mMethod;
+
+ /** argument array */
+ private final String[] mArgs;
+
+ public MethodAndArgsCaller(Method method, String[] args) {
+ mMethod = method;
+ mArgs = args;
+ }
+
+ public void run() {
+ try {
+ mMethod.invoke(null, new Object[] { mArgs });
+ } catch (IllegalAccessException ex) {
+ throw new RuntimeException(ex);
+ } catch (InvocationTargetException ex) {
+ Throwable cause = ex.getCause();
+ if (cause instanceof RuntimeException) {
+ throw (RuntimeException) cause;
+ } else if (cause instanceof Error) {
+ throw (Error) cause;
+ }
+ throw new RuntimeException(ex);
+ }
+ }
+ }
}