Re: [Caml-list] segfaults

[Richard Jones <rich@annexia.org>]

On Sat, Nov 08, 2003 at 12:11:11PM +0300, Anastasia Gornostaeva wrote:
> Hello.
> 
> My program often crashes. Why? I use Ocaml 3.06 and 3.07CVS under FreeBSD 4.9.
> In my program I use many packets such as ocaml-expat, cryptokid, ocaml-mysql,
> pcre-ocaml, ocurl, ocamlnet and so on.
> My programs works several hours and goes to core. All cores are different.
> It seems main problem is with GC.
> How to be?

Well, quite easily. I was getting segfaults in one program I wrote
because in the C part I'd accidentally used 'return' instead of the
'CAMLreturn' macro.

The way to diagnose these sorts of problems is to add regular calls to
`Gc.full_major ()' into your program. If the program crashes while
making these calls, then you can be fairly sure it's a GC-related
memory allocation problem. Look at the stack trace - it should give
you some clues.

Rich.

-- 
Richard Jones. http://www.annexia.org/ http://freshmeat.net/users/rwmj
Merjis Ltd. http://www.merjis.com/ - improving website return on investment
MONOLITH is an advanced framework for writing web applications in C, easier
than using Perl & Java, much faster and smaller, reusable widget-based arch,
database-backed, discussion, chat, calendaring:
http://www.annexia.org/freeware/monolith/

-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners