Date: Sat, 14 Sep 2002 23:29:39 +0400 (MSD) From: Maxim Konovalov <maxim@macomnet.ru> To: "Jacques A. Vidrine" <nectar@FreeBSD.org> Cc: Martin Blapp <mb@imp.ch>, <cvs-committers@FreeBSD.org>, <cvs-all@FreeBSD.org> Subject: Re: cvs commit: src/lib/libc/net getaddrinfo.c gethostbydns.c getnetbydns.c name6.c res_query.c res_update.c Message-ID: <20020914231230.Y12575-100000@news1.macomnet.ru> In-Reply-To: <20020914164057.GB92202@madman.nectar.cc> References: <20020914135323.I3162-100000@levais.imp.ch> <20020914164057.GB92202@madman.nectar.cc>
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On 20:40+0400, Sep 14, 2002, Jacques A. Vidrine wrote:
> On Sat, Sep 14, 2002 at 02:06:46PM +0200, Martin Blapp wrote:
> >
> > Hi,
> >
> > Almost every program which uses DNS is broken now by these commits. This is
> > mozilla ...
>
> Hmm, I cannot reproduce it. What's your environment?
>
> I have a meeting for the next few hours. I will try to reproduce the
> problem this evening.
Here is a testcase. It works on -stable and -current with MAXPACKET
1024 but core dumps on -current with MAXPACKET 65536 (today -current).
#include <netdb.h>
#include <pthread.h>
void *
teststack(void *dummy)
{
struct addrinfo *answer, info;
getaddrinfo("www.freebsd.org", NULL, &info, &answer);
return (NULL);
}
int
main(int argc, char *argv[])
{
pthread_t tid;
pthread_create(&tid, NULL, teststack, NULL);
pthread_exit(NULL);
return (0);
}
%%%
There is a thread's stack overflow because libc_r has a default stack
limit: PTHREAD_STACK_DEFAULT 65536, and now you allocate all the
thread stack in one function.
> If anyone else runs into the same, do not be shy about backing it
> out --- but please send me any reports!
--
Maxim Konovalov, MAcomnet, Internet Dept., system engineer
phone: +7 (095) 796-9079, mailto:maxim@macomnet.ru
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