Android question: how to connect to swank, running on android?

PR polos.ruetz at gmail.com
Sat Sep 30 11:02:25 UTC 2017


2017-09-29 23:10 GMT+02:00, Daniel Kochmański <daniel at turtleware.eu>:
> Hm, I was able to reproduce it after all. It seems, that condition wait
> on ECL is prone to race conditions.
>
> I've written alternative implementation using mailboxes, could you check
> with slime taken from https://github.com/dkochmanski/slime ? It seems to
> work for me, but before I make another pull request I want to double check.

Great! I tested (on the PC) with ECL 16.1.3 (official release) and
your Slime version, using the default :style :spawn, and tested longer
as the last time, and it seems stable now.

Thanks!

Paul




>
> Regards,
>
> Daniel
>
>
> On 29.09.2017 12:07, Daniel Kochmański wrote:
>> Hello,
>>
>> Thanks for the report. Regarding bad news, can your confirm that this
>> still happening with ecl from development branch?
>>
>> Best regards,
>> Daniel
>>
>> On 24.09.2017 16:04, PR wrote:
>>> 2017-09-03 1:22 GMT+02:00, PR <polos.ruetz at gmail.com>:
>>>> ...
>>> Hi again,
>>>
>>> so let's disentangle some confusion (partially created by me, sorry
>>> for that):
>>>
>>> I have good news (for android) and bad news (for current Slime v2.20):
>>>
>>>
>>> * First the good one:
>>>
>>> I found out that old Slime v2.19 is stable on android (even though it
>>> needs a tiny patch, as mentioned in an earlier mail).
>>> (So, what I'm currently doing in EQL5-Android is to include a patched
>>> Slime v2.19, just to be safe)
>>>
>>>
>>> * Now the bad news, _not_ related to android (and I can't be the only
>>> one experimenting this...):
>>>
>>> With current Slime v2.20, the Slime REPL will freeze occasionally,
>>> especially if the response from Swank takes some time to compute, e.g.
>>> with TAB completion. What causes the "freezing" is a segfault in ECL:
>>>
>>> I ran ECL through gdb, and the segfault seems related to GC (see
>>> attachment for the full backtrace). I was provoking the freezing with
>>> TAB completion (and it took me a few minutes to have it occur).
>>>
>>> If my subjective observations match reality, then this is caused when
>>> a GC is triggered during a Slime REPL command, waiting for a response
>>> from Swank (since these pauses are mostly very short, that coincidence
>>> doesn't happen very often).
>>>
>>> This problem definitely doesn't happen in Slime version v2.19, and
>>> it's not related to the new :SPAWN mode, because it happens even with
>>> :style NIL (the fallback communication style).
>>>
>>> Paul
>>
>
>



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