[Vm-dev] Set and get values from the VM AND the image

[Igor Stasenko]

On 10 May 2010 23:10, Mariano Martinez Peck <marianopeck at gmail.com> wrote:
>
>
>
> On Mon, May 10, 2010 at 5:09 PM, Igor Stasenko <siguctua at gmail.com> wrote:
>>
>> just add some flag to interpreter state (ivar), like 'enableTrace'
>> and a primitive which sets it to true or false.
>>
>
> What an idiot I am...thanks Igor. Sorry for the newbie/stupid questions. I am still new in this VM world and sometimes I don't know where I am (in OO or C world) and how to communicate from one to the other one.
>
> That worked perfectly.
>
> Thanks again.
>
Be my guest :)
I like VMMaker that it's based on a simple concepts, and actually is a
meta-programming tool, i.e. a
program which generates another program.

Once i discovered Squeak and downloaded VM sources, i was stumbled:
hey.. how do they manage to develop a VM with such weird looking
sources, which consists mainly from a huge, bloated 800k C code in a
single file, without any notion of organization and very hard to
follow :)

> Mariano
>
>
>>
>> On 10 May 2010 17:33, Mariano Martinez Peck <marianopeck at gmail.com> wrote:
>> >
>> > Hi folks. I need to intercept all messages. For such purpose, I modified Interpreter >> normalSend like this:
>> >
>> >
>> > normalSend
>> >     "Send a message, starting lookup with the receiver's class."
>> >     "Assume: messageSelector and argumentCount have been set, and that
>> >     the receiver and arguments have been pushed onto the stack,"
>> >     "Note: This method is inlined into the interpreter dispatch loop."
>> >     | rcvr |
>> >     self inline: true.
>> >     self sharedCodeNamed: 'normalSend' inCase: 131.
>> >     rcvr := self internalStackValue: argumentCount.
>> >     (self isIntegerObject:  rcvr)
>> >         ifFalse: [
>> >             self doSomething: rcvr.
>> >             ].
>> >     lkupClass := self fetchClassOf: rcvr.
>> >     receiverClass := lkupClass.
>> >     self commonSend.
>> >
>> >
>> >
>> > But now, from the IMAGE side I would like to enable or disable such intercept. It would be great if from the Image side I can set a value to a boolean and read such value and ask, from the VM side.
>> >
>> > Do you know if I can do this?  Should I use specialObjectArray ?  If true, can you give me a hint of how to do it ?
>> >
>> > Thank you very much.
>> >
>> > Mariano
>> >
>> >
>>
>>
>>
>> --
>> Best regards,
>> Igor Stasenko AKA sig.
>
>
>



-- 
Best regards,
Igor Stasenko AKA sig.