[Vm-dev] Simulator Question

[Gabriel Hernán Barbuto]

Andreas

Thank you very much for the correct way to implement this. I don't
know how to carry all these steps but I will learn how to do them. I
am trying now to get the list of the instance variables, this seems to
be easier. But the next step will be to display the value of these
variables so I will need to do this anyway.

Cheers
Gabriel

On Thu, Jan 6, 2011 at 7:10 PM, Andreas Raab <andreas.raab at gmx.de> wrote:
>
> On 1/6/2011 6:09 PM, Gabriel Hernán Barbuto wrote:
>>
>> I would like to push the selector and the receiver onto the stack and
>> then call something like Interpreter>>#commonSend and then clean the
>> stack.
>
> The 'correct' way to do that would be by:
> a) Creating a process for the message
> b) Setting up the context
> c) Pushing rcvr, selector, args
> d) Run the process until it completes
> e) Return the result
>
> Cheers,
>  - Andreas
>
>> Maybe I cannot call Interpreter>>#commonSend because it fetches the
>> next byte code and I don't want to modify the execution state. But at
>> least perform the rest of the calls. I don't know if this makes any
>> sense.
>>
>>> From what I have learned so far. Besides that this approach might not
>>
>> work. The problem seems to be creating the selector. If I can create
>> the selector I will try it anyway.
>>
>> Thanks again.
>>
>> Gabriel
>>
>>
>> On Thu, Jan 6, 2011 at 5:00 PM, Igor Stasenko<siguctua at gmail.com>  wrote:
>>>
>>> On 6 January 2011 16:41, Gabriel Hernán Barbuto<gbarbuto at gmail.com>
>>>  wrote:
>>>>
>>>> Hi
>>>>
>>>> I am working with the InterpreterSimulator and I would like to send a
>>>> message to an object inside the simulated environment. For example, I
>>>> have the oop for true and I want to send it the message printString.
>>>>
>>>> My question is if this is possible. I don't know if there is a way to
>>>> send a message to an object inside the simulation. I have thought
>>>> about tinkering with the stack and calling an interpreter method. But
>>>> I am not sure if this will work.
>>>>
>>>
>>> Hi, Gabriel.
>>> The problem is, that even if you prepare a context and all arguments
>>> for message send,
>>> you should start interpreting the code and then leave the interpret
>>> loop once you received the answer.
>>> But if you look at #interpret method, there is an infinite loop,
>>> and no way how to escape it.
>>>
>>> I don't know if there is a way to tell simulator to leave the loop at
>>> certain point.
>>>
>>>
>>> P.S. In general, it would be cool to have something like:
>>>
>>> sqInt interpreter_call( sqInt receiver , sqInt selector , sqInt *
>>> arguments )
>>>
>>> means: send message to receiver and return the answer.
>>>
>>> Unfortunately, Squeak VM does not provides such things, in contrast to
>>> languages like Lua,
>>> which providing C interoperability layer by default from very
>>> beginning of it existence.
>>>
>>>> Any hint will be much appreciated. Thanks in advance.
>>>>
>>>> Gabriel
>>>>
>>>
>>>
>>> --
>>> Best regards,
>>> Igor Stasenko AKA sig.
>>>
>>
>