FreeTDS Development Group

[Frediano Ziglio <freddy77 AT gmail.com>]

2009/3/8 Daniel Parnell <me AT danielparnell.com>:
> Hi James,
>
> Looks like I've got things working on my machine.
> What I had to do was replace any calls to strdup with a new function
> tds_strdup.
> I also have to replace the call to asprintf in odbc.c with sprintf
> into a character array and a tds_strdup (not too happy about that one).
>
> It's very VERY strange that I should need to do this.  I've tried
> replicating the problem with a smaller application without success.
>
> Daniel
>

Mmmm... this can be the problem

http://osdir.com/ml/web.curl.general/2004-12/msg00080.html

does Mac OS X has asprintf ?? Try using only your tds_strdup.

Reading at 
http://developer.apple.com/documentation/Darwin/Reference/Manpages/man3/asprintf.3.html
it seems that same problem apply also to asprintf/vasprintf. They
returns pointers malloc-ed with libc but if free is not from libc you
get heap corruption. The solution is to use a tds_strdup (as you did)
and say in configure that you don't have asprintf/vasprintf so FreeTDS
will compile a version that use proper malloc.

Which compiler are you using?

Another solution would be to link FreeTDS with libc malloc/free.

freddy77