| /* |
| * Copyright (C) 2007 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 org.apache.harmony.dalvik.ddmc.DdmVmInternal; |
| import android.util.Log; |
| import java.nio.ByteBuffer; |
| |
| /** |
| * Handle thread-related traffic. |
| */ |
| public class DdmHandleThread extends ChunkHandler { |
| |
| public static final int CHUNK_THEN = type("THEN"); |
| public static final int CHUNK_THCR = type("THCR"); |
| public static final int CHUNK_THDE = type("THDE"); |
| public static final int CHUNK_THST = type("THST"); |
| public static final int CHUNK_STKL = type("STKL"); |
| |
| private static DdmHandleThread mInstance = new DdmHandleThread(); |
| |
| |
| /* singleton, do not instantiate */ |
| private DdmHandleThread() {} |
| |
| /** |
| * Register for the messages we're interested in. |
| */ |
| public static void register() { |
| DdmServer.registerHandler(CHUNK_THEN, mInstance); |
| DdmServer.registerHandler(CHUNK_THST, mInstance); |
| DdmServer.registerHandler(CHUNK_STKL, 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 (false) |
| Log.v("ddm-thread", "Handling " + name(request.type) + " chunk"); |
| int type = request.type; |
| |
| if (type == CHUNK_THEN) { |
| return handleTHEN(request); |
| } else if (type == CHUNK_THST) { |
| return handleTHST(request); |
| } else if (type == CHUNK_STKL) { |
| return handleSTKL(request); |
| } else { |
| throw new RuntimeException("Unknown packet " |
| + ChunkHandler.name(type)); |
| } |
| } |
| |
| /* |
| * Handle a "THread notification ENable" request. |
| */ |
| private Chunk handleTHEN(Chunk request) { |
| ByteBuffer in = wrapChunk(request); |
| |
| boolean enable = (in.get() != 0); |
| //Log.i("ddm-thread", "Thread notify enable: " + enable); |
| |
| DdmVmInternal.threadNotify(enable); |
| return null; // empty response |
| } |
| |
| /* |
| * Handle a "THread STatus" request. This is constructed by the VM. |
| */ |
| private Chunk handleTHST(Chunk request) { |
| ByteBuffer in = wrapChunk(request); |
| // currently nothing to read from "in" |
| |
| //Log.d("ddm-thread", "Thread status request"); |
| |
| byte[] status = DdmVmInternal.getThreadStats(); |
| if (status != null) |
| return new Chunk(CHUNK_THST, status, 0, status.length); |
| else |
| return createFailChunk(1, "Can't build THST chunk"); |
| } |
| |
| /* |
| * Handle a STacK List request. |
| * |
| * This is done by threadId, which isn't great since those are |
| * recycled. We need a thread serial ID. The Linux tid is an okay |
| * answer as it's unlikely to recycle at the exact wrong moment. |
| * However, we're using the short threadId in THST messages, so we |
| * use them here for consistency. (One thought is to keep the current |
| * thread ID in the low 16 bits and somehow serialize the top 16 bits.) |
| */ |
| private Chunk handleSTKL(Chunk request) { |
| ByteBuffer in = wrapChunk(request); |
| int threadId; |
| |
| threadId = in.getInt(); |
| |
| //Log.d("ddm-thread", "Stack list request " + threadId); |
| |
| StackTraceElement[] trace = DdmVmInternal.getStackTraceById(threadId); |
| if (trace == null) { |
| return createFailChunk(1, "Stack trace unavailable"); |
| } else { |
| return createStackChunk(trace, threadId); |
| } |
| } |
| |
| /* |
| * Serialize a StackTraceElement[] into an STKL chunk. |
| * |
| * We include the threadId in the response so the other side doesn't have |
| * to match up requests and responses as carefully. |
| */ |
| private Chunk createStackChunk(StackTraceElement[] trace, int threadId) { |
| int bufferSize = 0; |
| |
| bufferSize += 4; // version, flags, whatever |
| bufferSize += 4; // thread ID |
| bufferSize += 4; // frame count |
| for (StackTraceElement elem : trace) { |
| bufferSize += 4 + elem.getClassName().length() * 2; |
| bufferSize += 4 + elem.getMethodName().length() * 2; |
| bufferSize += 4; |
| if (elem.getFileName() != null) |
| bufferSize += elem.getFileName().length() * 2; |
| bufferSize += 4; // line number |
| } |
| |
| ByteBuffer out = ByteBuffer.allocate(bufferSize); |
| out.putInt(0); |
| out.putInt(threadId); |
| out.putInt(trace.length); |
| for (StackTraceElement elem : trace) { |
| out.putInt(elem.getClassName().length()); |
| putString(out, elem.getClassName()); |
| out.putInt(elem.getMethodName().length()); |
| putString(out, elem.getMethodName()); |
| if (elem.getFileName() != null) { |
| out.putInt(elem.getFileName().length()); |
| putString(out, elem.getFileName()); |
| } else { |
| out.putInt(0); |
| } |
| out.putInt(elem.getLineNumber()); |
| } |
| |
| return new Chunk(CHUNK_STKL, out); |
| } |
| } |
| |