[Bug libc/1349] malloc_usable_size() incorrect when MALLOC_CHECK_>0

[drepper at redhat dot com]

------- Additional Comments From drepper at redhat dot com  2005-09-28 22:45 -------
You are misusing malloc_usable_size().  The function gives you information on
how much memory a really call can provide you in place.  It does not
automagically extends the memory block.  The realloc call is needed.

Admittedly, the information returned by malloc_usable_size() doesn't take the
magic byte into account and therefore a really call, which would normally be
extended in place, can require a repositioning.  But this is no big issue and
not worth changing.

In summary: your test code is wrong and deserves to crash.

-- 
           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID


http://sourceware.org/bugzilla/show_bug.cgi?id=1349

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