The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package android.ddm; |
| 18 | |
| 19 | import org.apache.harmony.dalvik.ddmc.Chunk; |
| 20 | import org.apache.harmony.dalvik.ddmc.ChunkHandler; |
| 21 | import org.apache.harmony.dalvik.ddmc.DdmServer; |
| 22 | import org.apache.harmony.dalvik.ddmc.DdmVmInternal; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | import android.util.Log; |
| 24 | import java.nio.ByteBuffer; |
| 25 | |
| 26 | /** |
| 27 | * Handle thread-related traffic. |
| 28 | */ |
| 29 | public class DdmHandleThread extends ChunkHandler { |
| 30 | |
| 31 | public static final int CHUNK_THEN = type("THEN"); |
| 32 | public static final int CHUNK_THCR = type("THCR"); |
| 33 | public static final int CHUNK_THDE = type("THDE"); |
| 34 | public static final int CHUNK_THST = type("THST"); |
| 35 | public static final int CHUNK_STKL = type("STKL"); |
| 36 | |
| 37 | private static DdmHandleThread mInstance = new DdmHandleThread(); |
| 38 | |
| 39 | |
| 40 | /* singleton, do not instantiate */ |
| 41 | private DdmHandleThread() {} |
| 42 | |
| 43 | /** |
| 44 | * Register for the messages we're interested in. |
| 45 | */ |
| 46 | public static void register() { |
| 47 | DdmServer.registerHandler(CHUNK_THEN, mInstance); |
| 48 | DdmServer.registerHandler(CHUNK_THST, mInstance); |
| 49 | DdmServer.registerHandler(CHUNK_STKL, mInstance); |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Called when the DDM server connects. The handler is allowed to |
| 54 | * send messages to the server. |
| 55 | */ |
| 56 | public void connected() {} |
| 57 | |
| 58 | /** |
| 59 | * Called when the DDM server disconnects. Can be used to disable |
| 60 | * periodic transmissions or clean up saved state. |
| 61 | */ |
| 62 | public void disconnected() {} |
| 63 | |
| 64 | /** |
| 65 | * Handle a chunk of data. |
| 66 | */ |
| 67 | public Chunk handleChunk(Chunk request) { |
Joe Onorato | 43a1765 | 2011-04-06 19:22:23 -0700 | [diff] [blame] | 68 | if (false) |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 69 | Log.v("ddm-thread", "Handling " + name(request.type) + " chunk"); |
| 70 | int type = request.type; |
| 71 | |
| 72 | if (type == CHUNK_THEN) { |
| 73 | return handleTHEN(request); |
| 74 | } else if (type == CHUNK_THST) { |
| 75 | return handleTHST(request); |
| 76 | } else if (type == CHUNK_STKL) { |
| 77 | return handleSTKL(request); |
| 78 | } else { |
| 79 | throw new RuntimeException("Unknown packet " |
| 80 | + ChunkHandler.name(type)); |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * Handle a "THread notification ENable" request. |
| 86 | */ |
| 87 | private Chunk handleTHEN(Chunk request) { |
| 88 | ByteBuffer in = wrapChunk(request); |
| 89 | |
| 90 | boolean enable = (in.get() != 0); |
| 91 | //Log.i("ddm-thread", "Thread notify enable: " + enable); |
| 92 | |
| 93 | DdmVmInternal.threadNotify(enable); |
| 94 | return null; // empty response |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Handle a "THread STatus" request. This is constructed by the VM. |
| 99 | */ |
| 100 | private Chunk handleTHST(Chunk request) { |
| 101 | ByteBuffer in = wrapChunk(request); |
| 102 | // currently nothing to read from "in" |
| 103 | |
| 104 | //Log.d("ddm-thread", "Thread status request"); |
| 105 | |
| 106 | byte[] status = DdmVmInternal.getThreadStats(); |
| 107 | if (status != null) |
| 108 | return new Chunk(CHUNK_THST, status, 0, status.length); |
| 109 | else |
| 110 | return createFailChunk(1, "Can't build THST chunk"); |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * Handle a STacK List request. |
| 115 | * |
| 116 | * This is done by threadId, which isn't great since those are |
| 117 | * recycled. We need a thread serial ID. The Linux tid is an okay |
| 118 | * answer as it's unlikely to recycle at the exact wrong moment. |
| 119 | * However, we're using the short threadId in THST messages, so we |
| 120 | * use them here for consistency. (One thought is to keep the current |
| 121 | * thread ID in the low 16 bits and somehow serialize the top 16 bits.) |
| 122 | */ |
| 123 | private Chunk handleSTKL(Chunk request) { |
| 124 | ByteBuffer in = wrapChunk(request); |
| 125 | int threadId; |
| 126 | |
| 127 | threadId = in.getInt(); |
| 128 | |
| 129 | //Log.d("ddm-thread", "Stack list request " + threadId); |
| 130 | |
| 131 | StackTraceElement[] trace = DdmVmInternal.getStackTraceById(threadId); |
| 132 | if (trace == null) { |
| 133 | return createFailChunk(1, "Stack trace unavailable"); |
| 134 | } else { |
| 135 | return createStackChunk(trace, threadId); |
| 136 | } |
| 137 | } |
| 138 | |
| 139 | /* |
| 140 | * Serialize a StackTraceElement[] into an STKL chunk. |
| 141 | * |
| 142 | * We include the threadId in the response so the other side doesn't have |
| 143 | * to match up requests and responses as carefully. |
| 144 | */ |
| 145 | private Chunk createStackChunk(StackTraceElement[] trace, int threadId) { |
| 146 | int bufferSize = 0; |
| 147 | |
| 148 | bufferSize += 4; // version, flags, whatever |
| 149 | bufferSize += 4; // thread ID |
| 150 | bufferSize += 4; // frame count |
| 151 | for (StackTraceElement elem : trace) { |
| 152 | bufferSize += 4 + elem.getClassName().length() * 2; |
| 153 | bufferSize += 4 + elem.getMethodName().length() * 2; |
| 154 | bufferSize += 4; |
| 155 | if (elem.getFileName() != null) |
| 156 | bufferSize += elem.getFileName().length() * 2; |
| 157 | bufferSize += 4; // line number |
| 158 | } |
| 159 | |
| 160 | ByteBuffer out = ByteBuffer.allocate(bufferSize); |
| 161 | out.putInt(0); |
| 162 | out.putInt(threadId); |
| 163 | out.putInt(trace.length); |
| 164 | for (StackTraceElement elem : trace) { |
| 165 | out.putInt(elem.getClassName().length()); |
| 166 | putString(out, elem.getClassName()); |
| 167 | out.putInt(elem.getMethodName().length()); |
| 168 | putString(out, elem.getMethodName()); |
| 169 | if (elem.getFileName() != null) { |
| 170 | out.putInt(elem.getFileName().length()); |
| 171 | putString(out, elem.getFileName()); |
| 172 | } else { |
| 173 | out.putInt(0); |
| 174 | } |
| 175 | out.putInt(elem.getLineNumber()); |
| 176 | } |
| 177 | |
| 178 | return new Chunk(CHUNK_STKL, out); |
| 179 | } |
| 180 | } |
| 181 | |