[Webkit-unassigned] [Bug 29026] CRASH: fastRealloc crashes on realloc(ptr, 0)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=29026


Alexey Proskuryakov <ap at webkit.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         OS/Version|Mac OS X 10.5               |All
           Platform|PC                          |All
                 CC|                            |ap at webkit.org




--- Comment #7 from Alexey Proskuryakov <ap at webkit.org>  2009-09-11 12:48:21 PDT ---
I agree that fastRealloc should have the same semantics as realloc, or be
renamed. However, I'm not sure which specification you're citing, as the
behavior is different per Mac OS X man page:

"If ptr is NULL, realloc() is identical to a call to malloc() for size bytes.
If size is zero and ptr is not NULL, a new, minimum sized object is allocated
and the original object is freed."

As a result, the behavior of realloc(0, 0) is implementation defined, but
realloc(nonNull, 0) doesn't return 0 unless minimum sized object allocation
fails.

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