1 files changed, 137 insertions, 0 deletions
diff --git a/core/java/android/ddm/DdmHandleProfiling.java b/core/java/android/ddm/DdmHandleProfiling.java
new file mode 100644
index 0000000..beed505
--- /dev/null
+++ b/core/java/android/ddm/DdmHandleProfiling.java
@@ -0,0 +1,137 @@
+/*
+ * 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);
+    }
+}
+