[squeak-dev] Unsent selectors in CompiledMethod
eliot.miranda at gmail.com
Sun Dec 13 21:59:18 UTC 2009
On Sun, Dec 13, 2009 at 1:53 PM, Igor Stasenko <siguctua at gmail.com> wrote:
> 2009/12/13 Eliot Miranda <eliot.miranda at gmail.com>:
> > I would keep CompiledMethod
> > class>>primitive:numArgs:numTemps:stackSize:literals:bytecodes:trailer:,
> > has some abstraction that could be useful for e.g. tests. I like the
> > assurance that CompiledMethod flag is zero, and so am happy to sere that
> > deleted. e.g. Cog has a mode controlled by vmParameterAt:put: where it
> > set the flag bits of methods that are interpreted. Craig has code in his
> > spoon VM which sets the flag for used methods. I would like to reserve
> > bit for introspective tasks like these, and for these it is convenient
> > all methods have a zero flag bit.
> > cheers
> Thanks for explanation. Should we put that in method's comment?
> What about second one?
I want to keep CompiledMethod
because it provides a reasonable way of creating methods that I could
imagine being used in e.g. test or a ClassBuilder that doesn't recompile
when shape changing but instead disassembles and reassembles (as the
VisualWorks one does).
BTW, anyone wanting something worthwhile to work on could choose this. The
idea is for the ClassBuilder to only update methods that access instance
variables.and do it without compiling from source, which is both faster and
removes run-=time dependency on exotic compilers. The ClassBuilder would
scan for methods that access instance variables, disassemble these to some
sort of symbolic bytecode, and reassemble them with updated inst var refs.
If this has already been done, e.g. in the context of the NewCompiler, then
it is still worth-while making this work in Squeak trunk and Pharo.
> > Eliot
> > On Sun, Dec 13, 2009 at 8:05 AM, Igor Stasenko <siguctua at gmail.com>
> >> Hello guys,
> >> there are few unsent messages on class side of CompiledMethod,
> >> primitive: primNum numArgs: numArgs numTemps: numTemps stackSize:
> >> stackSize literals: literals bytecodes: bytecodes trailer:
> >> trailerBytes
> >> and
> >> newBytes: numberOfBytes trailerBytes: trailer nArgs: nArgs nTemps:
> >> nTemps nStack: stackSize nLits: nLits primitive: primitiveIndex flag:
> >> flag
> >> I checked both in Pharo 1.1-core and in Trunk images, both of them
> >> seem having no senders.
> >> Any insights if it safe to wipe them out?
> >> --
> >> Best regards,
> >> Igor Stasenko AKA sig.
> Best regards,
> Igor Stasenko AKA sig.
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