[gambit-list] Dumping the heap

Dimitris Vyzovitis vyzo at hackzen.org
Thu Feb 1 08:06:19 EST 2018


thanks Guillaume!

this is a great start for me -- i am helping fare debug a memory leak, and
it's really hard to identify
without dumping the heap to see what kind of object is leaking.

-- vyzo

On Thu, Feb 1, 2018 at 2:46 PM, Guillaume Cartier <gcartier at jazzscheme.org>
wrote:

> Marc you wrote 2 pieces of code:
>
> - a heap walker: ##walk-object!
> - a function to copy recursively an object to a new memory zone (STILL,
> PERMANENT, ...): ##copy-object
>
> you also wrote a small test function: test-walk at the end of the file to
> showcase those
>
> The goal for me was to move large pieces of stable memory (classes for
> example) to PERMANENT memory so as to diminish the pressure on the garbage
> collector in the video game I'm writing. I ended up not using it in the
> game as I was never able to make it work correctly due to the complexities
> of the structures I wanted to copy.
>
> The implementation is available here: https://github.com/
> jazzscheme/jazz/blob/master/lib/gambit.walk/src/gambit/
> walk/implementation.scm. Dimitri, just remove the surrounding (unit
> protected gambit.walk.implementation ...) expression to get pure Gambit
> code.
>
> Note that Gambit 4.8.8 broke some pieces of the code. See the ;; fix
> gambit 4.8.8 undefined warnings comments throughout the code (should not be
> too hard to fix I think).
>
> Guillaume
>
> On Wed, Jan 31, 2018 at 9:23 AM, Dimitris Vyzovitis <vyzo at hackzen.org>
> wrote:
>
>> awesome, thank you!
>>
>> -- vyzo
>>
>> On Wed, Jan 31, 2018 at 4:03 PM, Guillaume Cartier <
>> gcartier at jazzscheme.org> wrote:
>>
>>> Yes Marc wrote some very nice code to explore the Gambit heap
>>> programmaticaly that I use in my projects. I'll refresh myself on the code
>>> and post it in a Gambit friendly format shortly.
>>>
>>> Guillaume
>>>
>>> On Wed, Jan 31, 2018 at 8:08 AM, Marc Feeley <feeley at iro.umontreal.ca>
>>> wrote:
>>>
>>>> Yes I remember helping Guillaume Cartier develop a procedure to do
>>>> this.  Perhaps he can help you with that.
>>>>
>>>> Marc
>>>>
>>>>
>>>>
>>>> > On Jan 29, 2018, at 1:00 PM, Dimitris Vyzovitis <vyzo at hackzen.org>
>>>> wrote:
>>>> >
>>>> > Is there a reasonable way to dump the live heap?
>>>> > It could help a lot with debugging memory leaks.
>>>> >
>>>> > -- vyzo
>>>>
>>>> _______________________________________________
>>>> Gambit-list mailing list
>>>> Gambit-list at iro.umontreal.ca
>>>> https://webmail.iro.umontreal.ca/mailman/listinfo/gambit-list
>>>>
>>>>
>>>
>>
>
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