[squeak-dev] The method trailer format

Nicolas Cellier nicolas.cellier.aka.nice at gmail.com
Tue Dec 15 08:16:05 UTC 2009

2009/12/15 Michael van der Gulik <mikevdg at gmail.com>:
> On Sun, Dec 13, 2009 at 4:17 AM, Igor Stasenko <siguctua at gmail.com> wrote:
>> Here is my proposal for changing the method trailer in order to be
>> able to encode various stuff to trailer.
>> Any corrections, suggestions are welcome.
>> The kind of compiled method trailer is determined by the last byte of
>> compiled method.
>> The format is following:
>>        "2rkkkkkkdd"
> Er... yuck.
> If I were doing this (which, cooincidently, I am at the moment), I
> would completely separate source code management from CompiledMethod.
> Trash the CompiledMethod trailer and ignore the temp names. Instead,
> add a second dictionary to Class which stores the source code pointers
> ("sourceDictionary" or something). If you don't want source code for a
> class, you can make it nil.
> What I'm currently working on is a bit more radical. I'm completely
> separating source code from it's compiled form. I have PackageSource,
> NamespaceSource, ClassSource and MethodSource classes which store
> source code (in the image, not using source files) and contain methods
> for compiling code, managing code, etc. Then I have Package,
> Namespace, Class and CompiledMethod classes which only contain what is
> necessary to run the code and relink themselves into a new image.
> Gulik.

It is not uncommon to have some CompiledMethod not installed in any
     CompiledMethod allInstances reject: [:e | e isInstalled]
Accessing associated source would become impossible in this scheme


> --
> http://gulik.pbwiki.com/

More information about the Squeak-dev mailing list