DragonFly bugs List (threaded) for 2009-05
DragonFly BSD
DragonFly bugs List (threaded) for 2009-05
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Re: zero-size malloc and ps: kvm_getprocs: Bad address


From: "Simon 'corecode' Schubert" <corecode@xxxxxxxxxxxx>
Date: Sun, 24 May 2009 10:26:24 +0200

YONETANI Tomokazu wrote:
Hello.
On recent -DEVELOPMENT ps command displays a non-intuitive error message
on a non-existent pid:
  ps: kvm_getprocs: Bad address

Apparently the recent malloc reimplementation has changed malloc(3) family
so as malloc(0) now returns a pointer such that useracc() returns EFAULT
for it.

I think we should make malloc(0) return a valid pointer. Whether to return NULL or a pointer is implementation specific, and I believe our previous malloc, and most other mallocs out there indeed return a pointer and don't return NULL.


cheers
  simon

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