/// <summary>
/// Create a packet from the stream.
/// </summary>
/// <param name="header">The first 11 bytes of the data.</param>
/// <param name="stream">The stream with the data</param>
/// <returns>a new Packet</returns>
/// <exception cref="IOException">If the data in the stream are invalid.</exception>
internal static Packet Read(byte[] header, Stream stream)
{
Packet packet = new Packet();
packet.data = header;
int len = packet.ReadInt();
if (len < 11)
{
throw new IOException("protocol error - invalid length");
}
packet.id = packet.ReadInt();
int flags = packet.ReadByte();
if ((flags & Reply) == 0)
{
packet.cmdSet = packet.ReadByte();
packet.cmd = packet.ReadByte();
}
else
{
packet.errorCode = packet.ReadShort();
}
packet.data = new byte[len - 11];
DebuggerUtils.ReadFully(stream, packet.data);
packet.offset = 0;
return packet;
}
/// <summary>
/// Create a empty packet to send an Event from the target VM (debuggee) to the debugger.
/// </summary>
/// <returns>a new packet</returns>
internal static Packet CreateEventPacket()
{
Packet packet = new Packet();
packet.id = ++packetCounter;
packet.cmdSet = ikvm.debugger.CommandSet.Event;
packet.cmd = 100;
packet.isEvent = true;
return packet;
}
internal void SendPacket(Packet packet)
{
lock (writeMonitor)
{
packet.Send(stream);
}
}
/// <summary>
/// http://java.sun.com/javase/6/docs/platform/jpda/jdwp/jdwp-protocol.html#JDWP_VirtualMachine
/// </summary>
/// <param name="packet"></param>
private void CommandSetVirtualMachine(Packet packet)
{
switch (packet.Command)
{
case VirtualMachine.Version:
packet.WriteString("IKVM Debugger");
packet.WriteInt(1);
packet.WriteInt(6);
packet.WriteString("1.6.0");
packet.WriteString("IKVM.NET");
break;
case VirtualMachine.ClassesBySignature:
String jniClassName = packet.ReadString();
IList<TargetType> types = target.FindTypes(jniClassName);
packet.WriteInt(types.Count); // count
foreach (TargetType type in types)
{
Console.Error.WriteLine("FindTypes:" + jniClassName + ":" + type.TypeId);
packet.WriteByte(TypeTag.CLASS); //TODO can also a interface
packet.WriteObjectID(type.TypeId);
packet.WriteInt(ClassStatus.INITIALIZED);
}
break;
case VirtualMachine.AllThreads:
int[] ids = target.GetThreadIDs();
packet.WriteInt(ids.Length);
for (int i = 0; i < ids.Length; i++)
{
packet.WriteObjectID(ids[i]);
}
break;
case VirtualMachine.IDSizes:
int size = 4; //we use a size of 4, a value of 8 is also possible
packet.WriteInt(size); // fieldID size in bytes
packet.WriteInt(size); // methodID size in bytes
packet.WriteInt(size); // objectID size in bytes
packet.WriteInt(size); // referenceTypeID size in bytes
packet.WriteInt(size); // frameID size in bytes
break;
case VirtualMachine.Suspend:
target.Suspend();
break;
case VirtualMachine.Resume:
target.Resume();
break;
case VirtualMachine.Exit:
target.Exit(packet.ReadInt());
break;
case VirtualMachine.Capabilities:
packet.WriteBool(false); // Can the VM watch field modification, and therefore can it send the Modification Watchpoint Event?
packet.WriteBool(false); // Can the VM watch field access, and therefore can it send the Access Watchpoint Event?
packet.WriteBool(false); // Can the VM get the bytecodes of a given method?
packet.WriteBool(false); // Can the VM determine whether a field or method is synthetic? (that is, can the VM determine if the method or the field was invented by the compiler?)
packet.WriteBool(false); // Can the VM get the owned monitors infornation for a thread?
packet.WriteBool(false); // Can the VM get the current contended monitor of a thread?
packet.WriteBool(false); // Can the VM get the monitor information for a given object?
break;
case VirtualMachine.CapabilitiesNew:
packet.WriteBool(false); // Can the VM watch field modification, and therefore can it send the Modification Watchpoint Event?
packet.WriteBool(false); // Can the VM watch field access, and therefore can it send the Access Watchpoint Event?
packet.WriteBool(false); // Can the VM get the bytecodes of a given method?
packet.WriteBool(false); // Can the VM determine whether a field or method is synthetic? (that is, can the VM determine if the method or the field was invented by the compiler?)
packet.WriteBool(false); // Can the VM get the owned monitors infornation for a thread?
packet.WriteBool(false); // Can the VM get the current contended monitor of a thread?
packet.WriteBool(false); // Can the VM get the monitor information for a given object?
packet.WriteBool(false); // Can the VM redefine classes?
packet.WriteBool(false); // Can the VM add methods when redefining classes?
packet.WriteBool(false); // Can the VM redefine classesin arbitrary ways?
packet.WriteBool(false); // Can the VM pop stack frames?
packet.WriteBool(false); // Can the VM filter events by specific object?
packet.WriteBool(false); // Can the VM get the source debug extension?
packet.WriteBool(false); // Can the VM request VM death events?
packet.WriteBool(false); // Can the VM set a default stratum?
packet.WriteBool(false); // Can the VM return instances, counts of instances of classes and referring objects?
packet.WriteBool(false); // Can the VM request monitor events?
packet.WriteBool(false); // Can the VM get monitors with frame depth info?
packet.WriteBool(false); // Can the VM filter class prepare events by source name?
packet.WriteBool(false); // Can the VM return the constant pool information?
packet.WriteBool(false); // Can the VM force early return from a method?
packet.WriteBool(false); // reserved22
packet.WriteBool(false); // reserved23
packet.WriteBool(false); // reserved24
packet.WriteBool(false); // reserved25
packet.WriteBool(false); // reserved26
packet.WriteBool(false); // reserved27
packet.WriteBool(false); // reserved28
packet.WriteBool(false); // reserved29
packet.WriteBool(false); // reserved30
packet.WriteBool(false); // reserved31
packet.WriteBool(false); // reserved32
break;
default:
NotImplementedPacket(packet); // include a SendPacket
break;
}
}
private void NotImplementedPacket(Packet packet)
{
Console.Error.WriteLine("================================");
Console.Error.WriteLine("Not Implemented Packet:" + packet.CommandSet + "-" + packet.Command);
Console.Error.WriteLine("================================");
packet.Error = Error.NOT_IMPLEMENTED;
}
/// <summary>
/// http://java.sun.com/javase/6/docs/platform/jpda/jdwp/jdwp-protocol.html#JDWP_EventRequest
/// </summary>
/// <param name="packet"></param>
private void CommandSetEventRequest(Packet packet)
{
switch (packet.Command)
{
case EventRequest.CmdSet:
EventRequest eventRequest = EventRequest.create(packet);
Console.Error.WriteLine(eventRequest);
if (eventRequest == null)
{
NotImplementedPacket(packet);
}
else
{
target.AddEventRequest(eventRequest);
packet.WriteInt(eventRequest.RequestId);
}
break;
default:
NotImplementedPacket(packet);
break;
}
}
/// <summary>
/// http://java.sun.com/javase/6/docs/platform/jpda/jdwp/jdwp-protocol.html#JDWP_ReferenceType
/// </summary>
/// <param name="packet"></param>
private void CommandSetReferenceType(Packet packet)
{
switch (packet.Command)
{
case ReferenceType.Signature:
int typeID = packet.ReadObjectID();
TargetType type = target.FindType(typeID);
Console.Error.WriteLine(typeID + ":" + type.GetJniSignature());
packet.WriteString(type.GetJniSignature());
break;
case ReferenceType.ClassLoader:
int classLoaderID = packet.ReadObjectID();
packet.WriteObjectID(0); //TODO 0 - System Classloader, we can use module ID instead
break;
case ReferenceType.MethodsWithGeneric:
typeID = packet.ReadObjectID();
Console.Error.WriteLine(typeID);
type = target.FindType(typeID);
IList<TargetMethod> methods = type.GetMethods();
packet.WriteInt(methods.Count);
foreach (TargetMethod method in methods)
{
Console.Error.WriteLine(method.MethodId + ":" + method.Name + ":" + method.JniSignature + ":" + method.GenericSignature+":"+method.AccessFlags);
packet.WriteObjectID(method.MethodId);
packet.WriteString(method.Name);
packet.WriteString(method.JniSignature);
packet.WriteString(method.GenericSignature);
packet.WriteInt(method.AccessFlags);
}
break;
default:
NotImplementedPacket(packet);
break;
}
}
