Re: [Qemacs-devel] [PATCH] Shut up valgrind

[François Revol]

On 24/01/2014 02:03, Charles Gordon wrote:
> On 23 janv. 2014, at 14:40, François Revol <address@hidden> wrote:
> 
>> On 23/01/2014 14:02, Charles Gordon wrote:
>>> Hi Francois,
>>>
>>> I just committed a large patch to fix this issue among other malloc related 
>>> inconsistencies.
>>> valgrind was right, it was a bug!
>>> qe_mallocz would have cleared the allocated structure, but you used malloc 
>>> in haiku.cpp to allocate it :(
>>> valgrind rules!
>>
>> Actually I ran it on GNU/Linux since valgrind isn't available yet on
>> Haiku... (I just started the port).
>> The X11 code did use qe_mallocz, but I didn't check the tty code though.
> 
> Then this issue is unresolved.
> I fixed most memory leaks using valgrind, but I cannot test x11 on Linux for 
> the moment.

It seems to be fixed here.

I believe it's the qe_malloc in tty.c at font creation that you changed
to qe_mallocz.
On Linux both X11 and tty support are built, so it probably initialized
the tty display regardless.

As for the --free-all option, I don't see the need, if you want to free
at exit then do it, but there is no need for an option :p

It makes a difference:

==450==     in use at exit: 934,064 bytes in 894 blocks
vs.
==451==     in use at exit: 71,025 bytes in 497 blocks

But it frees a little too much maybe:

==451== Invalid read of size 8
==451==    at 0x41B104: main (qe.c:8111)
==451==  Address 0x647b1f0 is 0 bytes inside a block of size 24 free'd
==451==    at 0x4C2A70C: free (vg_replace_malloc.c:468)
==451==    by 0x41B12B: main (qe.c:8112)

So I'd say just don't bother.

François.