zero-size malloc and ps: kvm_getprocs: Bad address

Sun May 24 12:00:43 PDT 2009

Matthew Dillon wrote:
    We currently return an invalid non-NULL pointer, ZERO_LENGTH_PTR,
    which I have set to ((void *)-8).
    We can change ZERO_LENGTH_PTR to be whatever we want, including
    making it a pointer to valid memory like the address of a dummy
    global.
The standard however demands a unique pointer to be returned - we can't 
return a constant pointer.  I think rounding up to the minimal size sounds 
good.

cheers
  simon
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