Re: [PATCH] MALLOC_CHECK: Allow checking to be disabled from config.mak

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Junio C Hamano wrote:
> Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxx> writes:
> 
>> The malloc checks can be disabled using the TEST_NO_MALLOC_CHECK
>> variable, either from the environment or command line of an
>> 'make test' invocation. In order to allow the malloc checks to be
>> disabled from the 'config.mak' file, we add TEST_NO_MALLOC_CHECK
>> to the environment using an export directive.
> 
> We would want to encourage people to test with cheap but effective
> checks when available.  I do not see "malloc: using debugging hooks"
> message anywhere when I run tests, but if you do, I'd rather see us
> check if we can tell glibc to stop doing so first without disabling
> the whole test.  Your patch feels like the first step to a slipperly
> slope whose destination would make us say "we get too many messages
> so let's do nothing in "make test" with this configuration." when
> taken to the extreme, and obviously we would not want to go there
> ;-).

[sorry for the late reply, I've been away ...]

Yes, but ... I really don't see that this patch would encourage anyone
to skip the malloc checks, who wasn't going to anyway! I didn't notice
much of an increase in the running time of the tests, so that wouldn't
discourage me. This idiotic message spewage is a different issue.
(the complete loss of terminal scroll-back is particularly annoying)

I had intended to run the tests with malloc checks enabled before
submitting patches, testing -rc* builds etc., but have them disabled
for day-to-day programming.

> Besides, doesn't a simple instruction to export TEST_NO_MALLOC_CHECK
> to your environment before running "make test" suffice?

Yes, so I can simply disable the malloc checks in my ~/.bashrc file.
However, it would be disappointing to have my config tweeks in two
places ... :(

I guess I can live with it ...

ATB,
Ramsay Jones



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