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DdmHandleHello.javaAPI DocAndroid 5.1 API7130Thu Mar 12 22:22:10 GMT 2015android.ddm

DdmHandleHello

public class DdmHandleHello extends org.apache.harmony.dalvik.ddmc.ChunkHandler
Handle "hello" messages and feature discovery.

Fields Summary
public static final int
CHUNK_HELO
public static final int
CHUNK_WAIT
public static final int
CHUNK_FEAT
private static DdmHandleHello
mInstance
private static final String[]
FRAMEWORK_FEATURES
Constructors Summary
private DdmHandleHello()


    /* singleton, do not instantiate */
Methods Summary
public voidconnected()
Called when the DDM server connects. The handler is allowed to send messages to the server.

        if (false)
            Log.v("ddm-hello", "Connected!");

        if (false) {
            /* test spontaneous transmission */
            byte[] data = new byte[] { 0, 1, 2, 3, 4, -4, -3, -2, -1, 127 };
            Chunk testChunk =
                new Chunk(ChunkHandler.type("TEST"), data, 1, data.length-2);
            DdmServer.sendChunk(testChunk);
        }
public voiddisconnected()
Called when the DDM server disconnects. Can be used to disable periodic transmissions or clean up saved state.

        if (false)
            Log.v("ddm-hello", "Disconnected!");
public org.apache.harmony.dalvik.ddmc.ChunkhandleChunk(org.apache.harmony.dalvik.ddmc.Chunk request)
Handle a chunk of data.

        if (false)
            Log.v("ddm-heap", "Handling " + name(request.type) + " chunk");
        int type = request.type;

        if (type == CHUNK_HELO) {
            return handleHELO(request);
        } else if (type == CHUNK_FEAT) {
            return handleFEAT(request);
        } else {
            throw new RuntimeException("Unknown packet "
                + ChunkHandler.name(type));
        }
private org.apache.harmony.dalvik.ddmc.ChunkhandleFEAT(org.apache.harmony.dalvik.ddmc.Chunk request)

        // TODO: query the VM to ensure that support for these features
        // is actually compiled in
        final String[] vmFeatures = Debug.getVmFeatureList();

        if (false)
            Log.v("ddm-heap", "Got feature list request");

        int size = 4 + 4 * (vmFeatures.length + FRAMEWORK_FEATURES.length);
        for (int i = vmFeatures.length-1; i >= 0; i--)
            size += vmFeatures[i].length() * 2;
        for (int i = FRAMEWORK_FEATURES.length-1; i>= 0; i--)
            size += FRAMEWORK_FEATURES[i].length() * 2;

        ByteBuffer out = ByteBuffer.allocate(size);
        out.order(ChunkHandler.CHUNK_ORDER);
        out.putInt(vmFeatures.length + FRAMEWORK_FEATURES.length);
        for (int i = vmFeatures.length-1; i >= 0; i--) {
            out.putInt(vmFeatures[i].length());
            putString(out, vmFeatures[i]);
        }
        for (int i = FRAMEWORK_FEATURES.length-1; i >= 0; i--) {
            out.putInt(FRAMEWORK_FEATURES[i].length());
            putString(out, FRAMEWORK_FEATURES[i]);
        }

        return new Chunk(CHUNK_FEAT, out);
private org.apache.harmony.dalvik.ddmc.ChunkhandleHELO(org.apache.harmony.dalvik.ddmc.Chunk request)

        if (false)
            return createFailChunk(123, "This is a test");

        /*
         * Process the request.
         */
        ByteBuffer in = wrapChunk(request);

        int serverProtoVers = in.getInt();
        if (false)
            Log.v("ddm-hello", "Server version is " + serverProtoVers);

        /*
         * Create a response.
         */
        String vmName = System.getProperty("java.vm.name", "?");
        String vmVersion = System.getProperty("java.vm.version", "?");
        String vmIdent = vmName + " v" + vmVersion;

        //String appName = android.app.ActivityThread.currentPackageName();
        //if (appName == null)
        //    appName = "unknown";
        String appName = DdmHandleAppName.getAppName();

        VMRuntime vmRuntime = VMRuntime.getRuntime();
        String instructionSetDescription =
            vmRuntime.is64Bit() ? "64-bit" : "32-bit";
        String vmInstructionSet = vmRuntime.vmInstructionSet();
        if (vmInstructionSet != null && vmInstructionSet.length() > 0) {
          instructionSetDescription += " (" + vmInstructionSet + ")";
        }
        String vmFlags = "CheckJNI="
            + (vmRuntime.isCheckJniEnabled() ? "true" : "false");

        ByteBuffer out = ByteBuffer.allocate(28
                            + vmIdent.length() * 2
                            + appName.length() * 2
                            + instructionSetDescription.length() * 2
                            + vmFlags.length() * 2);
        out.order(ChunkHandler.CHUNK_ORDER);
        out.putInt(DdmServer.CLIENT_PROTOCOL_VERSION);
        out.putInt(android.os.Process.myPid());
        out.putInt(vmIdent.length());
        out.putInt(appName.length());
        putString(out, vmIdent);
        putString(out, appName);
        out.putInt(UserHandle.myUserId());
        out.putInt(instructionSetDescription.length());
        putString(out, instructionSetDescription);
        out.putInt(vmFlags.length());
        putString(out, vmFlags);

        Chunk reply = new Chunk(CHUNK_HELO, out);

        /*
         * Take the opportunity to inform DDMS if we are waiting for a
         * debugger to attach.
         */
        if (Debug.waitingForDebugger())
            sendWAIT(0);

        return reply;
public static voidregister()
Register for the messages we're interested in.

        DdmServer.registerHandler(CHUNK_HELO, mInstance);
        DdmServer.registerHandler(CHUNK_FEAT, mInstance);
public static voidsendWAIT(int reason)
Send up a WAIT chunk. The only currently defined value for "reason" is zero, which means "waiting for a debugger".

        byte[] data = new byte[] { (byte) reason };
        Chunk waitChunk = new Chunk(CHUNK_WAIT, data, 0, 1);
        DdmServer.sendChunk(waitChunk);