[ragel] Ragel sanitise output - memory leaks

[Adrian Thurston]

Sorry, no change. The problems are in the form of memory leaks in ragel
mucking up your clean build reports? Maybe you could turn them off for
ragel? Honestly it's never really been a strong concern for me since
ragel is a one-shot kind of program. Some improvements were made when I
added libfsm, but that was mostly in the core FSM code. 

My current concerns with ragel are to get out-of-tree support for
alternate host languages. Will have some time for that in December.
Removing leaks is something I would work on when 7.0 gets to stable
status. 

Adrian 

On 2017-11-08 20:08, Samuel Williams wrote: 

> Any update to this? Still causing problems for me. 
> 
> On 9 October 2017 at 10:34, Samuel Williams <space.ship.traveller at gmail.com> wrote:
> 
>> Here is some log output from a build which invokes ragel to generate several parsers. I've cut out (most) unimportant output. 
>> 
>> The source code for the parsers: https://github.com/kurocha/async-http/tree/master/source/Async/HTTP/V1 [1] 
>> The results from running Ragel several times with LLVM sanitisers: https://gist.github.com/ioquatix/2e50ffb09697107338f8f75083400143 [2]
>> 
>> The main issue I can see are memory leaks, but there could be other issues. 
>> 
>> Since Ragel is a one-shot "compiler", perhaps it's not important to address these, except as a matter of correctness. 
>> 
>> I think there are potential problem with memory leaks and they might be covering up bigger issues - there might be cases where memory is being accessed incorrectly but it's not causing a crash because it's not freed at the right point etc. 
>> 
>> I'd suggest that if there is a test suite for Ragel, it's updated to run with the undefined behaviour sanitiser and address sanitiser - both provide useful output IMHO. 
>> 
>> Happy to provide more feedback. 
>> 
>> Kind regards, 
>> Samuel
> 
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Links:
------
[1]
https://github.com/kurocha/async-http/tree/master/source/Async/HTTP/V1
[2] https://gist.github.com/ioquatix/2e50ffb09697107338f8f75083400143
[3] http://www.colm.net/cgi-bin/mailman/listinfo/ragel
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