Date: Mon, 9 Aug 1999 10:06:26 -0400 From: Dan Moschuk <dan@trinsec.com> To: Tony Finch <dot@dotat.at> Cc: hackers@freebsd.org Subject: Re: gethostbyaddr() and threads. Message-ID: <19990809100626.A43835@trinsec.com> In-Reply-To: <E11Dok0-000LN9-00@fanf.noc.demon.net>; from Tony Finch on Mon, Aug 09, 1999 at 01:41:24PM %2B0100 References: <19990808204333.A40377@trinsec.com> <E11Dok0-000LN9-00@fanf.noc.demon.net>
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| >After quite an exhausting night (of all the ways I didn't want to spend my | >Sunday...) I've managed to track down a problem that has been frustrating me | >all night. The problem exists with multiple threads calling gethostbyaddr() | >(not necessarily at the same time). | | src/lib/libc/net/gethostbydns.c seems to use a load of static | variables in a non-thread-safe fashion. Yes, I noticed that as well. I also noticed that gethostbyaddr_r worked "less" than gethostbyaddr did (the result was that all threads ended up thrashing each other, and not of them continued on). I was going to use res_query, but noticed that it too used static buffers (although it looks pretty easy to fix). Would anyone be offended if I were to produce a few patches to fix up these routines once and for all? Should I just produce a few #ifdef _THREAD_SAFEs or try full blown routines (gethostbyaddr_r, res_query_r)? Thanks, Dan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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