Merge "Extend the INVOKE_VIEW_METHOD of the "Generic View Operation" (VUOP)... (c55420dc) · Commits · e / os / android_frameworks_base

core/java/android/ddm/DdmHandleViewDebug.java

+234 −63

Original line number	Diff line number	Diff line
		@@ -16,12 +16,16 @@

		package android.ddm;

		import static com.android.internal.util.Preconditions.checkArgument;

		import android.util.Log;
		import android.view.View;
		import android.view.ViewDebug;
		import android.view.ViewRootImpl;
		import android.view.WindowManagerGlobal;

		import com.android.internal.annotations.VisibleForTesting;

		import org.apache.harmony.dalvik.ddmc.Chunk;
		import org.apache.harmony.dalvik.ddmc.ChunkHandler;
		import org.apache.harmony.dalvik.ddmc.DdmServer;
		@@ -34,6 +38,7 @@ import java.io.OutputStreamWriter;
		import java.lang.reflect.Method;
		import java.nio.BufferUnderflowException;
		import java.nio.ByteBuffer;
		import java.nio.charset.StandardCharsets;

		/**
		* Handle various requests related to profiling / debugging of the view system.
		@@ -123,15 +128,16 @@ public class DdmHandleViewDebug extends DdmHandle {
		}

		if (type == CHUNK_VURT) {
		if (op == VURT_DUMP_HIERARCHY)
		if (op == VURT_DUMP_HIERARCHY) {
		return dumpHierarchy(rootView, in);
		else if (op == VURT_CAPTURE_LAYERS)
		} else if (op == VURT_CAPTURE_LAYERS) {
		return captureLayers(rootView);
		else if (op == VURT_DUMP_THEME)
		} else if (op == VURT_DUMP_THEME) {
		return dumpTheme(rootView);
		else
		} else {
		return createFailChunk(ERR_INVALID_OP, "Unknown view root operation: " + op);
		}
		}

		final View targetView = getTargetView(rootView, in);
		if (targetView == null) {
		@@ -305,16 +311,46 @@ public class DdmHandleViewDebug extends DdmHandle {
		* The method name and its arguments are passed in as inputs via the byte buffer.
		* The buffer contains:<ol>
		* <li> len(method name) </li>
		* <li> method name </li>
		* <li> method name (encoded as UTF-16 2-byte characters) </li>
		* <li> # of args </li>
		* <li> arguments: Each argument comprises of a type specifier followed by the actual argument.
		* The type specifier is a single character as used in JNI:
		* (Z - boolean, B - byte, C - char, S - short, I - int, J - long,
		* F - float, D - double). <p>
		* The type specifier is followed by the actual value of argument.
		* Booleans are encoded via bytes with 0 indicating false.</li>
		* The type specifier is one character modelled after JNI signatures:
		* <ul>
		* <li>[ - array<br>
		* This is followed by a second character according to this spec, indicating the
		* array type, then the array length as an Int, followed by a repeated encoding
		* of the actual data.
		* WARNING: Only <b>byte[]</b> is supported currently.
		* </li>
		* <li>Z - boolean<br>
		* Booleans are encoded via bytes with 0 indicating false</li>
		* <li>B - byte</li>
		* <li>C - char</li>
		* <li>S - short</li>
		* <li>I - int</li>
		* <li>J - long</li>
		* <li>F - float</li>
		* <li>D - double</li>
		* <li>V - void<br>
		* NOT followed by a value. Only used for return types</li>
		* <li>R - String (not a real JNI type, but added for convenience)<br>
		* Strings are encoded as an unsigned short of the number of <b>bytes</b>,
		* followed by the actual UTF-8 encoded bytes.
		* WARNING: This is the same encoding as produced by
		* ViewHierarchyEncoder#writeString. However, note that this encoding is
		* different to what DdmHandle#getString() expects, which is used in other places
		* in this class.
		* WARNING: Since the length is the number of UTF-8 encoded bytes, Strings can
		* contain up to 64k ASCII characters, yet depending on the actual data, the true
		* maximum might be as little as 21844 unicode characters.
		* <b>null</b> String objects are encoded as an empty string
		* </li>
		* </ul>
		* </li>
		* </ol>
		* Methods that take no arguments need only specify the method name.
		*
		* The return value is encoded the same way as a single parameter (type + value)
		*/
		private Chunk invokeViewMethod(final View rootView, final View targetView, ByteBuffer in) {
		int l = in.getInt();
		@@ -327,54 +363,17 @@ public class DdmHandleViewDebug extends DdmHandle {
		args = new Object[0];
		} else {
		int nArgs = in.getInt();

		argTypes = new Class<?>[nArgs];
		args = new Object[nArgs];

		for (int i = 0; i < nArgs; i++) {
		char c = in.getChar();
		switch (c) {
		case 'Z':
		argTypes[i] = boolean.class;
		args[i] = in.get() == 0 ? false : true;
		break;
		case 'B':
		argTypes[i] = byte.class;
		args[i] = in.get();
		break;
		case 'C':
		argTypes[i] = char.class;
		args[i] = in.getChar();
		break;
		case 'S':
		argTypes[i] = short.class;
		args[i] = in.getShort();
		break;
		case 'I':
		argTypes[i] = int.class;
		args[i] = in.getInt();
		break;
		case 'J':
		argTypes[i] = long.class;
		args[i] = in.getLong();
		break;
		case 'F':
		argTypes[i] = float.class;
		args[i] = in.getFloat();
		break;
		case 'D':
		argTypes[i] = double.class;
		args[i] = in.getDouble();
		break;
		default:
		Log.e(TAG, "arg " + i + ", unrecognized type: " + c);
		return createFailChunk(ERR_INVALID_PARAM,
		"Unsupported parameter type (" + c + ") to invoke view method.");
		}
		try {
		deserializeMethodParameters(args, argTypes, in);
		} catch (ViewMethodInvocationSerializationException e) {
		return createFailChunk(ERR_INVALID_PARAM, e.getMessage());
		}
		}

		Method method = null;
		Method method;
		try {
		method = targetView.getClass().getMethod(methodName, argTypes);
		} catch (NoSuchMethodException e) {
		@@ -384,7 +383,10 @@ public class DdmHandleViewDebug extends DdmHandle {
		}

		try {
		ViewDebug.invokeViewMethod(targetView, method, args);
		Object result = ViewDebug.invokeViewMethod(targetView, method, args);
		Class<?> returnType = method.getReturnType();
		byte[] returnValue = serializeReturnValue(returnType, returnType.cast(result));
		return new Chunk(CHUNK_VUOP, returnValue, 0, returnValue.length);
		} catch (Exception e) {
		Log.e(TAG, "Exception while invoking method: " + e.getCause().getMessage());
		String msg = e.getCause().getMessage();
		@@ -393,8 +395,6 @@ public class DdmHandleViewDebug extends DdmHandle {
		}
		return createFailChunk(ERR_EXCEPTION, msg);
		}

		return null;
		}

		private Chunk setLayoutParameter(final View rootView, final View targetView, ByteBuffer in) {
		@@ -431,4 +431,175 @@ public class DdmHandleViewDebug extends DdmHandle {
		byte[] data = b.toByteArray();
		return new Chunk(CHUNK_VUOP, data, 0, data.length);
		}

		/**
		* Deserializes parameters according to the VUOP_INVOKE_VIEW_METHOD protocol the {@code in}
		* buffer.
		*
		* The length of {@code args} determines how many arguments are read. The {@code argTypes} must
		* be the same length, and will be set to the argument types of the data read.
		*
		* @hide
		*/
		@VisibleForTesting
		public static void deserializeMethodParameters(
		Object[] args, Class<?>[] argTypes, ByteBuffer in) throws
		ViewMethodInvocationSerializationException {
		checkArgument(args.length == argTypes.length);

		for (int i = 0; i < args.length; i++) {
		char typeSignature = in.getChar();
		boolean isArray = typeSignature == SIG_ARRAY;
		if (isArray) {
		char arrayType = in.getChar();
		if (arrayType != SIG_BYTE) {
		// This implementation only supports byte-arrays for now.
		throw new ViewMethodInvocationSerializationException(
		"Unsupported array parameter type (" + typeSignature
		+ ") to invoke view method @argument " + i);
		}

		int arrayLength = in.getInt();
		if (arrayLength > in.remaining()) {
		// The sender did not actually sent the specified amount of bytes. This
		// avoids a malformed packet to trigger an out-of-memory error.
		throw new BufferUnderflowException();
		}

		byte[] byteArray = new byte[arrayLength];
		in.get(byteArray);

		argTypes[i] = byte[].class;
		args[i] = byteArray;
		} else {
		switch (typeSignature) {
		case SIG_BOOLEAN:
		argTypes[i] = boolean.class;
		args[i] = in.get() != 0;
		break;
		case SIG_BYTE:
		argTypes[i] = byte.class;
		args[i] = in.get();
		break;
		case SIG_CHAR:
		argTypes[i] = char.class;
		args[i] = in.getChar();
		break;
		case SIG_SHORT:
		argTypes[i] = short.class;
		args[i] = in.getShort();
		break;
		case SIG_INT:
		argTypes[i] = int.class;
		args[i] = in.getInt();
		break;
		case SIG_LONG:
		argTypes[i] = long.class;
		args[i] = in.getLong();
		break;
		case SIG_FLOAT:
		argTypes[i] = float.class;
		args[i] = in.getFloat();
		break;
		case SIG_DOUBLE:
		argTypes[i] = double.class;
		args[i] = in.getDouble();
		break;
		case SIG_STRING: {
		argTypes[i] = String.class;
		int stringUtf8ByteCount = Short.toUnsignedInt(in.getShort());
		byte[] rawStringBuffer = new byte[stringUtf8ByteCount];
		in.get(rawStringBuffer);
		args[i] = new String(rawStringBuffer, StandardCharsets.UTF_8);
		break;
		}
		default:
		Log.e(TAG, "arg " + i + ", unrecognized type: " + typeSignature);
		throw new ViewMethodInvocationSerializationException(
		"Unsupported parameter type (" + typeSignature
		+ ") to invoke view method.");
		}
		}

		}
		}

		/**
		* Serializes {@code value} to the wire protocol of VUOP_INVOKE_VIEW_METHOD.
		* @hide
		*/
		@VisibleForTesting
		public static byte[] serializeReturnValue(Class<?> type, Object value)
		throws ViewMethodInvocationSerializationException, IOException {
		ByteArrayOutputStream byteOutStream = new ByteArrayOutputStream(1024);
		DataOutputStream dos = new DataOutputStream(byteOutStream);

		if (type.isArray()) {
		if (!type.equals(byte[].class)) {
		// Only byte arrays are supported currently.
		throw new ViewMethodInvocationSerializationException(
		"Unsupported array return type (" + type + ")");
		}
		byte[] byteArray = (byte[]) value;
		dos.writeChar(SIG_ARRAY);
		dos.writeChar(SIG_BYTE);
		dos.writeInt(byteArray.length);
		dos.write(byteArray);
		} else if (boolean.class.equals(type)) {
		dos.writeChar(SIG_BOOLEAN);
		dos.write((boolean) value ? 1 : 0);
		} else if (byte.class.equals(type)) {
		dos.writeChar(SIG_BYTE);
		dos.writeByte((byte) value);
		} else if (char.class.equals(type)) {
		dos.writeChar(SIG_CHAR);
		dos.writeChar((char) value);
		} else if (short.class.equals(type)) {
		dos.writeChar(SIG_SHORT);
		dos.writeShort((short) value);
		} else if (int.class.equals(type)) {
		dos.writeChar(SIG_INT);
		dos.writeInt((int) value);
		} else if (long.class.equals(type)) {
		dos.writeChar(SIG_LONG);
		dos.writeLong((long) value);
		} else if (double.class.equals(type)) {
		dos.writeChar(SIG_DOUBLE);
		dos.writeDouble((double) value);
		} else if (float.class.equals(type)) {
		dos.writeChar(SIG_FLOAT);
		dos.writeFloat((float) value);
		} else if (String.class.equals(type)) {
		dos.writeChar(SIG_STRING);
		dos.writeUTF(value != null ? (String) value : "");
		} else {
		dos.writeChar(SIG_VOID);
		}

		return byteOutStream.toByteArray();
		}

		// Prefixes for simple primitives. These match the JNI definitions.
		private static final char SIG_ARRAY = '[';
		private static final char SIG_BOOLEAN = 'Z';
		private static final char SIG_BYTE = 'B';
		private static final char SIG_SHORT = 'S';
		private static final char SIG_CHAR = 'C';
		private static final char SIG_INT = 'I';
		private static final char SIG_LONG = 'J';
		private static final char SIG_FLOAT = 'F';
		private static final char SIG_DOUBLE = 'D';
		private static final char SIG_VOID = 'V';
		// Prefixes for some commonly used objects
		private static final char SIG_STRING = 'R';

		/**
		* @hide
		*/
		@VisibleForTesting
		public static class ViewMethodInvocationSerializationException extends Exception {
		ViewMethodInvocationSerializationException(String message) {
		super(message);
		}
		}
		}

core/tests/coretests/src/android/ddm/DdmHandleViewDebugTest.java

0 → 100644

+398 −0

File added.

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