Can realloc be marked as a mallloc-like function?

H.J. Lu hjl@lucon.org
Sat Jul 14 16:20:00 GMT 2007


On Sat, Jul 14, 2007 at 06:03:33PM +0200, Tobias Schlüter wrote:
> H.J. Lu wrote:
> >It looks like gcc assumes a functon marked with DECL_IS_MALLOC won't
> >return an address which can alias something else. But it isn't true
> >for realloc. Now, the qestions are
> >
> >1. Can gcc make such an assumption?
> >2. Can realloc be marked as DECL_IS_MALLOC.
> >
> >BTW, glibc also marks realloc with __attribute_malloc__.
> 
> There was an absurdely long thread on this topic starting at 
> <http://gcc.gnu.org/ml/gcc/2004-01/msg00005.html>.  I didn't dig through 
> it to find the answer.

Now, we have a real testcase to show the problem. How do we solve
it?


H.J.



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