sbrk(2) broken

[Andrey Chernov]

On Wed, Jan 02, 2008 at 10:38:40PM -0800, Jason Evans wrote:
> Poul-Henning noticed today that xchat fails to start if malloc uses sbrk 
> internally.  

Malloc() itself knows about memory amount _really_ in use by a program and 
could check it don't go beyond the limits, but for this it needs run-time 
check via getrlimit() call for each malloc() call (a program can use 
setrlimit() by itself). Traking direct mmap()s and sbrk()s outside of 
malloc() is also needed.

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