[Vm-dev] debugging the garbage collector

[Noah Evans]

I've gotten all the necessary files in the VM compiling however in the
link phase I am running into problems because different functions have
different signatures in different files (Plan 9 does not do dynamic
linking).

For example tenuringIncrementalGC has the following definition in
sqVirtualMachine.c

platforms/Cross/vm/sqVirtualMachine.c:80: sqInt tenuringIncrementalGC(void);

and the following in cointerp.c

src/vm/cointerp.c:1150: void tenuringIncrementalGC(void);

Would anyone object if I tried to regularize the function signatures
between files?

Noah


On Fri, Feb 15, 2013 at 4:50 PM, Noah Evans <noah.evans at gmail.com> wrote:
> Aaaah... I see. Any documentation on the differences between the two
> or I should I just factor out the functions that differ between the
> two when the time comes?
>
> Noah
>
>
> On Fri, Feb 15, 2013 at 4:49 PM, Bert Freudenberg <bert at freudenbergs.de> wrote:
>>
>>
>> On 2013-02-15, at 16:42, Noah Evans <noah.evans at gmail.com> wrote:
>>
>>>
>>> My goal is to have general squeak support, I started with Spoon but
>>> I'd like it to work across VMs. As I understand it the svn tree is
>>> canonical, which makes it a good place to start.
>>>
>>> Noah
>>
>> It is, but you need to be aware that we have two different VMs: the interpreter (http://squeakvm.org/svn/squeak/trunk/) and Cog (http://squeakvm.org/svn/squeak/branches/Cog/). And the Spoon VM is based on the interpreter.
>>
>> - Bert -
>>
>>> On Fri, Feb 15, 2013 at 4:34 PM, David T. Lewis <lewis at mail.msen.com> wrote:
>>>>
>>>> On Fri, Feb 15, 2013 at 02:52:45PM +0100, Noah Evans wrote:
>>>>>
>>>>> I've taken bert's advice and gotten the canonical svn tree. For the
>>>>> moment I've gone away from VMMaker sources and started with the svn
>>>>> tree's cointerp.c. Once I have that working (most of it already
>>>>> compiles, I just need to decide what to do with alloca--it's
>>>>> unimplemented in Plan9 posix emulation) I'll go back and work with
>>>>> Spoon. I'm just trying to minimize the number of variables for the
>>>>> moment. The svn tree has been really great in this regard.
>>>>>
>>>>> Can anyone point me to a contributing page for how to submit patches?
>>>>> Or just to the mailing list proper?
>>>>>
>>>>> Noah
>>>>
>>>> The mailing list for sure. And depending on which branch you end up
>>>> working with, maybe some other procedures. But definitely post to this
>>>> list :)
>>>>
>>>> I still worry that Craig seems to be saying that he is working with sources
>>>> from trunk, and you seem to be saying that you are working with sources
>>>> from the Cog branch. Assuming your goal is to get a VM for running Spoon,
>>>> you should make sure that you're on the same page with Craig, otherwise
>>>> you're going to be in for a lot of extra work.
>>>>
>>>> Dave
>>>>
>>>>>
>>>>>
>>>>> On Fri, Feb 15, 2013 at 2:47 PM, David T. Lewis <lewis at mail.msen.com> wrote:
>>>>>>
>>>>>> On Fri, Feb 15, 2013 at 01:14:17PM +0100, Bert Freudenberg wrote:
>>>>>>>
>>>>>>> On 2013-02-15, at 11:27, Noah Evans <noah.evans at gmail.com> wrote:
>>>>>>>
>>>>>>>> Craig, which version of Cog are you using? I'm using the tip of the
>>>>>>>> gitorious tree.
>>>>>>>
>>>>>>> Eliot's canonical sources are in subversion:
>>>>>>>
>>>>>>> http://squeakvm.org/svn/squeak/branches/Cog/
>>>>>>>
>>>>>>
>>>>>> Oh dear, I suspect we may have some confusion here. Craig says:
>>>>>>
>>>>>>
>>>>>>>     The current release of Spoon is 3 beta 3 (23 October 2012),
>>>>>>> available at:
>>>>>>>
>>>>>>>     http://netjam.org/spoon/releases/current
>>>>>>>
>>>>>>>     It includes a Squeak 4.2 object memory (4 February 2011) with
>>>>>>> VMMaker dtl.237 (23 May 2011) installed, and the Spoon VM changes
>>>>>>> applied to that, and with remote browsing support installed. It runs on
>>>>>>> the VM it generates, which is the only one supplied in the release (Mac
>>>>>>> OS, Linux and win32).
>>>>>>
>>>>>> Noah, what platform sources did you start with? The VM that Craig
>>>>>> describes would have been compiled with platform sources from the
>>>>>> trunk VM (not branches/Cog). Those sources are at:
>>>>>>
>>>>>>  http://squeakvm.org/svn/squeak/trunk
>>>>>>
>>>>>> You would need to use a version of those sources from the early 2011
>>>>>> time frame. But I would suggest very stongly that you get an exact
>>>>>> copy of sources from Craig so that you are starting from exactly the
>>>>>> same code base that he is using (or maybe that's what you meant in your
>>>>>> question to Craig the about gitorious tree).
>>>>>>
>>>>>> Mixing generated source code from VMMaker trunk (e.g. VMMaker-dtl.237)
>>>>>> with platform sources from branches/Cog will definitely not work.
>>>>>> And mixing generated sources (from VMMaker) with platform sources
>>>>>> (from Subversion) that are not from the same general time frame will
>>>>>> probably not work.
>>>>>>
>>>>>> Dave
>>>>>>
>>