This is the mail archive of the
mailing list for the Cygwin project.
Re: ld: fatal error - cmalloc would have returned NULL
-----BEGIN PGP SIGNED MESSAGE-----
Am 11.03.2011 16:07, schrieb Corinna Vinschen:
> On Mar 11 15:23, Corinna Vinschen wrote:
>> On Mar 11 15:13, Corinna Vinschen wrote:
>>> On Mar 11 14:53, Rainer Emrich wrote:
>>>> I have to be more clear. I increased the heap_chunk_in_mb to 1792 using:
>>>> regtool -i set /HKLM/Software/Cygwin/heap_chunk_in_mb 1792
>>> But that's the size of the application heap, not the size of the
>>> cygheap. The cygheap is used by a couple of internal datastructures
>>> of the cygwin DLL itself, while the application heap is used for malloc.
>>> So you raised the size of the application heap, probably not to 1792
>>> Megs, but the next lower allocation possible (cygwin decrements the size
>>> in 1MB steps until the allocation succeeds.
>>> That's weird. malloc uses mmap, but only for allocations beyond 128K.
>> Actually mmap is only used if you try to malloc >= 256K.
>>> Since ld only allocates 64K chunks, it doesn't look like mmap is called
>>> from malloc. OTOH, if raising the heap size helps, how do the
>>> zillions of mmap calls into this picture?!?
> I was wondering if I could reduce the pressure on the cygheap by using a
> simplified method to allocate the required bookkeeping datastructures.
> It passes my homebrew mmap testsuite, but I would be curious if this
> might fix your problem. I have not very much hope, but anyway...
> Would you mind if I send you a link to a cygwin DLL for testing by
> private email?
Yes, of course. You're welcome to send me a link. I' m able to test next week.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.10 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
-----END PGP SIGNATURE-----
Problem reports: http://cygwin.com/problems.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple