I've got a program written for MySQL version 3 (don't ask, long story as to why
we haven't upgraded this particular system), compiled using gcc v3.2 on SUSE
Linux version 2.4.19-64GB-SMP. I'm getting a segmentation fault when I run
using ONE set of input parameters (but not any others).
When I run under valgrind, I get the following error just before the
segmentation fault:
==21258== Invalid read of size 4
==21258== at 0x4023BBF7: mysql_fetch_fields (in
/usr/lib/libmysqlclient.so.10.0.0)
==21258== Address 0x10 is not stack'd, malloc'd or free'd
The particular call in the source code is
fields = mysql_fetch_fields(res);
where fields is defined as
MYSQL_FIELD *fields;
Can anyone with more familiarity with the C API internals tell me whether or
not mysql_fetch_fields() allocates space for the pointer it returns? This
hasn't been an issue in any other programs and my suspicion is that I'm
clobbering memory somewhere else (but if it's as simple as me needing to
allocate space for the returned pointer, then I'd like to know!)
Thanks.
--
Dave Weingart, Sr. Programmer/Analyst "I can call modules from the vasty
RNA Private Label Services deep." -- "Why, so can I, or so can
Voice: +1-516-682-1470 any programmer. But will they run
FAX : +1-516-496-0113 when you do call for them?"
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