SquirrelJME/SquirrelJME

// -*- Mode: Java; indent-tabs-mode: t; tab-width: 4 -*-
// ---------------------------------------------------------------------------
// Multi-Phasic Applications: SquirrelJME
//     Copyright (C) Stephanie Gawroriski <xer@multiphasicapps.net>
// ---------------------------------------------------------------------------
// SquirrelJME is under the Mozilla Public License Version 2.0.
// See license.mkd for licensing and copyright information.
// ---------------------------------------------------------------------------

package cc.squirreljme.emulator;

import cc.squirreljme.emulator.vm.VMDebuggerService;
import cc.squirreljme.jdwp.host.JDWPHostFactory;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Method;
import net.multiphasicapps.io.BidirectionalPipe;
import net.multiphasicapps.io.BidirectionalPipeSide;

/**
 * Service for this debugger.
 *
 * @since 2024/01/19
 */
public class BuiltInDebuggerService
    implements VMDebuggerService
{
    /**
     * {@inheritDoc}
     * @since 2024/01/19
     */
    @Override
    public JDWPHostFactory jdwpFactory()
    {
        // Setup a bidirectional local pipe
        BidirectionalPipe pipe = new BidirectionalPipe();
        
        // Start debugger with one end of the pipe
        BidirectionalPipeSide a = pipe.side(false);
        
        try
        {
            // Get the built-in debugger's start method
            Class<?> debuggerMain = Class.forName(
                "cc.squirreljme.debugger.Main");
            Method start = debuggerMain.getMethod("start",
                InputStream.class, OutputStream.class,
                Class.forName("cc.squirreljme.debugger.Preferences"));
            
            // Call it with the streams
            start.invoke(null, a.in(), a.out(), null);
        }
        catch (ReflectiveOperationException __e)
        {
            return null;
        }
        
        // JDWP factory gets the other end
        BidirectionalPipeSide b = pipe.side(true);
        return new JDWPHostFactory(b.in(), b.out());
    }
}