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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.ddm;
import org.apache.harmony.dalvik.ddmc.Chunk;
import org.apache.harmony.dalvik.ddmc.ChunkHandler;
import org.apache.harmony.dalvik.ddmc.DdmServer;
import android.os.Debug;
import android.util.Config;
import android.util.Log;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* Handle profiling requests.
*/
public class DdmHandleProfiling extends ChunkHandler {
public static final int CHUNK_MPRS = type("MPRS");
public static final int CHUNK_MPRE = type("MPRE");
public static final int CHUNK_MPRQ = type("MPRQ");
private static DdmHandleProfiling mInstance = new DdmHandleProfiling();
/* singleton, do not instantiate */
private DdmHandleProfiling() {}
/**
* Register for the messages we're interested in.
*/
public static void register() {
DdmServer.registerHandler(CHUNK_MPRS, mInstance);
DdmServer.registerHandler(CHUNK_MPRE, mInstance);
DdmServer.registerHandler(CHUNK_MPRQ, mInstance);
}
/**
* Called when the DDM server connects. The handler is allowed to
* send messages to the server.
*/
public void connected() {}
/**
* Called when the DDM server disconnects. Can be used to disable
* periodic transmissions or clean up saved state.
*/
public void disconnected() {}
/**
* Handle a chunk of data.
*/
public Chunk handleChunk(Chunk request) {
if (Config.LOGV)
Log.v("ddm-heap", "Handling " + name(request.type) + " chunk");
int type = request.type;
if (type == CHUNK_MPRS) {
return handleMPRS(request);
} else if (type == CHUNK_MPRE) {
return handleMPRE(request);
} else if (type == CHUNK_MPRQ) {
return handleMPRQ(request);
} else {
throw new RuntimeException("Unknown packet "
+ ChunkHandler.name(type));
}
}
/*
* Handle a "Method PRofiling Start" request.
*/
private Chunk handleMPRS(Chunk request) {
ByteBuffer in = wrapChunk(request);
int bufferSize = in.getInt();
int flags = in.getInt();
int len = in.getInt();
String fileName = getString(in, len);
if (Config.LOGV)
Log.v("ddm-heap", "Method profiling start: filename='" + fileName
+ "', size=" + bufferSize + ", flags=" + flags);
try {
Debug.startMethodTracing(fileName, bufferSize, flags);
return null; // empty response
} catch (RuntimeException re) {
return createFailChunk(1, re.getMessage());
}
}
/*
* Handle a "Method PRofiling End" request.
*/
private Chunk handleMPRE(Chunk request) {
byte result;
try {
Debug.stopMethodTracing();
result = 0;
} catch (RuntimeException re) {
Log.w("ddm-heap", "Method profiling end failed: "
+ re.getMessage());
result = 1;
}
/* create a non-empty reply so the handler fires on completion */
byte[] reply = { result };
return new Chunk(CHUNK_MPRE, reply, 0, reply.length);
}
/*
* Handle a "Method PRofiling Query" request.
*/
private Chunk handleMPRQ(Chunk request) {
int result = Debug.isMethodTracingActive() ? 1 : 0;
/* create a non-empty reply so the handler fires on completion */
byte[] reply = { (byte) result };
return new Chunk(CHUNK_MPRQ, reply, 0, reply.length);
}
}
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