Date: Thu, 29 Jul 1999 13:00:01 -0700 (PDT) From: Sheldon Hearn <sheldonh@uunet.co.za> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/12853 Message-ID: <199907292000.NAA75026@freefall.freebsd.org>
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The following reply was made to PR bin/12853; it has been noted by GNATS.
From: Sheldon Hearn <sheldonh@uunet.co.za>
To: FreeBSD-gnats-submit@freebsd.org
Cc:
Subject: Re: bin/12853
Date: Thu, 29 Jul 1999 21:55:39 +0200
Text from misfiled PR's associated with this one:
From eischen@vigrid.com Wed Jul 28 10:02:06 1999
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Date: Wed, 28 Jul 1999 12:59:28 -0400 (EDT)
From: Daniel Eischen <eischen@vigrid.com>
To: FreeBSD-gnats-submit@freebsd.org, mi@aldan.algebra.com
Cc: eischen@vigrid.com, jb@cimlogic.com.au, lawlopez@cisco.com,
msestina@cisco.com, sjlee@cisco.com
Subject: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Number: 12854
>Category: pending
>Synopsis: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: gnats-admin
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jul 28 10:10:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:
>Release:
>Organization:
>Environment:
>Description:
Wow, this CC: list is growing!
Can you please try this more complete patch (made against -stable)?
I believe it better handles initialization of the fd tables for fds
< 3.
Index: uthread_fd.c
===================================================================
RCS file: /A/cvs/src/lib/libc_r/uthread/uthread_fd.c,v
retrieving revision 1.9.2.2
diff -u -r1.9.2.2 uthread_fd.c
--- uthread_fd.c 1999/07/23 13:00:27 1.9.2.2
+++ uthread_fd.c 1999/07/28 16:31:33
@@ -94,13 +94,13 @@
TAILQ_INIT(&entry->w_queue);
/* Get the flags for the file: */
- if (fd >= 3 && (entry->flags =
- _thread_sys_fcntl(fd, F_GETFL, 0)) == -1) {
+ if (((fd >= 3) || (_pthread_stdio_flags[fd] == -1)) &&
+ (entry->flags = _thread_sys_fcntl(fd, F_GETFL, 0)) == -1) {
ret = -1;
- }
+ }
else {
/* Check if a stdio descriptor: */
- if (fd < 3)
+ if ((fd < 3) && (_pthread_stdio_flags[fd] != -1))
/*
* Use the stdio flags read by
* _pthread_init() to avoid
Index: uthread_init.c
===================================================================
RCS file: /A/cvs/src/lib/libc_r/uthread/uthread_init.c,v
retrieving revision 1.9.2.3
diff -u -r1.9.2.3 uthread_init.c
--- uthread_init.c 1999/07/23 13:00:29 1.9.2.3
+++ uthread_init.c 1999/07/28 16:43:27
@@ -121,8 +121,9 @@
/* Get the standard I/O flags before messing with them : */
for (i = 0; i < 3; i++)
- if ((_pthread_stdio_flags[i] =
- _thread_sys_fcntl(i,F_GETFL, NULL)) == -1)
+ if (((_pthread_stdio_flags[i] =
+ _thread_sys_fcntl(i,F_GETFL, NULL)) == -1) &&
+ (errno != EBADF))
PANIC("Cannot get stdio flags");
/*
@@ -292,12 +293,18 @@
}
/* Initialize stdio file descriptor table entries: */
- if ((_thread_fd_table_init(0) != 0) ||
- (_thread_fd_table_init(1) != 0) ||
- (_thread_fd_table_init(2) != 0)) {
- PANIC("Cannot initialize stdio file descriptor "
- "table entries");
- }
+ if ((_thread_fd_table_init(0) != 0) &&
+ (errno != EBADF))
+ PANIC("Cannot initialize stdio file "
+ "descriptor table entries");
+ else if ((_thread_fd_table_init(1) != 0) &&
+ (errno != EBADF))
+ PANIC("Cannot initialize stdout file "
+ "descriptor table entries");
+ else if ((_thread_fd_table_init(2) != 0) &&
+ (errno != EBADF))
+ PANIC("Cannot initialize stderr file "
+ "descriptor table entries");
}
}
Dan Eischen
eischen@vigrid.com
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
From lawlopez@cisco.com Wed Jul 28 16:47:44 1999
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Message-Id: <379F9692.180CE56E@cisco.com>
Date: Wed, 28 Jul 1999 19:47:30 -0400
From: "Lawrence D. Lopez" <lawlopez@cisco.com>
Sender: lawlopez@cisco.com
To: Daniel Eischen <eischen@vigrid.com>
Cc: FreeBSD-gnats-submit@freebsd.org, mi@aldan.algebra.com,
jb@cimlogic.com.au, msestina@cisco.com, sjlee@cisco.com
Subject: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
References: <199907281659.MAA06499@pcnet1.pcnet.com>
>Number: 12860
>Category: pending
>Synopsis: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: gnats-admin
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jul 28 16:50:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:
>Release:
>Organization:
>Environment:
>Description:
This is a multi-part message in MIME format.
--------------BD951E80393B91190D1AEB4A
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Dan,
Test procedure:
attached is a tarfile which contains
the test procedure.
***
extract it from the mail.
tar xcv tarfile
cd thread
make
***
This is what is in the tarfile:
makefile:
all:
rm -f run thread *.core
cc -o thread thread.c -lc_r
cc -o run run.c
./run
Program 1: thread.c:
main()
{
}
Compile it like:
cc -o thread thread.c -lc_r
Program 2: run.c
main()
{
close(0);
execl("./thread", "./thead", 0);
perror("execl");
}
Compile it like:
cc -o run run.c
Now type ./run to cause the bug:
./run
Fatal error 'Cannot get stdio flags' at line ? in
file /usr/src/lib/libc_r/uthread/uthread_init.c
(errno = ?)
Segmentation fault (core dumped)
Hope this helps!
Larry
Daniel Eischen wrote:
>
> Wow, this CC: list is growing!
>
> Can you please try this more complete patch (made against -stable)?
> I believe it better handles initialization of the fd tables for fds
> < 3.
>
> Index: uthread_fd.c
> ===================================================================
> RCS file: /A/cvs/src/lib/libc_r/uthread/uthread_fd.c,v
> retrieving revision 1.9.2.2
> diff -u -r1.9.2.2 uthread_fd.c
> --- uthread_fd.c 1999/07/23 13:00:27 1.9.2.2
> +++ uthread_fd.c 1999/07/28 16:31:33
> @@ -94,13 +94,13 @@
> TAILQ_INIT(&entry->w_queue);
>
> /* Get the flags for the file: */
> - if (fd >= 3 && (entry->flags =
> - _thread_sys_fcntl(fd, F_GETFL, 0)) == -1) {
> + if (((fd >= 3) || (_pthread_stdio_flags[fd] == -1)) &&
> + (entry->flags = _thread_sys_fcntl(fd, F_GETFL, 0)) == -1) {
> ret = -1;
> - }
> + }
> else {
> /* Check if a stdio descriptor: */
> - if (fd < 3)
> + if ((fd < 3) && (_pthread_stdio_flags[fd] != -1))
> /*
> * Use the stdio flags read by
> * _pthread_init() to avoid
> Index: uthread_init.c
> ===================================================================
> RCS file: /A/cvs/src/lib/libc_r/uthread/uthread_init.c,v
> retrieving revision 1.9.2.3
> diff -u -r1.9.2.3 uthread_init.c
> --- uthread_init.c 1999/07/23 13:00:29 1.9.2.3
> +++ uthread_init.c 1999/07/28 16:43:27
> @@ -121,8 +121,9 @@
>
> /* Get the standard I/O flags before messing with them : */
> for (i = 0; i < 3; i++)
> - if ((_pthread_stdio_flags[i] =
> - _thread_sys_fcntl(i,F_GETFL, NULL)) == -1)
> + if (((_pthread_stdio_flags[i] =
> + _thread_sys_fcntl(i,F_GETFL, NULL)) == -1) &&
> + (errno != EBADF))
> PANIC("Cannot get stdio flags");
>
> /*
> @@ -292,12 +293,18 @@
> }
>
> /* Initialize stdio file descriptor table entries: */
> - if ((_thread_fd_table_init(0) != 0) ||
> - (_thread_fd_table_init(1) != 0) ||
> - (_thread_fd_table_init(2) != 0)) {
> - PANIC("Cannot initialize stdio file descriptor "
> - "table entries");
> - }
> + if ((_thread_fd_table_init(0) != 0) &&
> + (errno != EBADF))
> + PANIC("Cannot initialize stdio file "
> + "descriptor table entries");
> + else if ((_thread_fd_table_init(1) != 0) &&
> + (errno != EBADF))
> + PANIC("Cannot initialize stdout file "
> + "descriptor table entries");
> + else if ((_thread_fd_table_init(2) != 0) &&
> + (errno != EBADF))
> + PANIC("Cannot initialize stderr file "
> + "descriptor table entries");
> }
> }
>
>
> Dan Eischen
> eischen@vigrid.com
--------------BD951E80393B91190D1AEB4A
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--------------BD951E80393B91190D1AEB4A--
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
From jb@cimlogic.com.au Wed Jul 28 16:55:22 1999
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Message-Id: <199907290001.KAA58415@cimlogic.com.au>
Date: Thu, 29 Jul 1999 10:01:12 +1000 (EST)
From: John Birrell <jb@cimlogic.com.au>
To: lawlopez@cisco.com (Lawrence D. Lopez)
Cc: eischen@vigrid.com (Daniel Eischen),
FreeBSD-gnats-submit@freebsd.org, mi@aldan.algebra.com,
jb@cimlogic.com.au, msestina@cisco.com, sjlee@cisco.com
In-Reply-To: <379F9692.180CE56E@cisco.com> from "Lawrence D. Lopez" at "Jul 28, 1999 07:47:30 pm"
Subject: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Number: 12861
>Category: pending
>Synopsis: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: gnats-admin
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jul 28 17:00:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:
>Release:
>Organization:
>Environment:
>Description:
Lawrence D. Lopez wrote:
> cc -o thread thread.c -lc_r
This is wrong. You are linking against both libc _and_ libc_r.
Use -pthread instead of -lc_r.
--
John Birrell - jb@cimlogic.com.au; jb@freebsd.org http://www.cimlogic.com.au/
CIMlogic Pty Ltd, GPO Box 117A, Melbourne Vic 3001, Australia +61 418 353 137
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
From eischen@vigrid.com Wed Jul 28 17:16:02 1999
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Message-Id: <199907290013.UAA01121@pcnet1.pcnet.com>
Date: Wed, 28 Jul 1999 20:13:41 -0400 (EDT)
From: Daniel Eischen <eischen@vigrid.com>
To: eischen@vigrid.com, lawlopez@cisco.com
Cc: FreeBSD-gnats-submit@freebsd.org, jb@cimlogic.com.au,
mi@aldan.algebra.com, msestina@cisco.com, sjlee@cisco.com
Subject: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Number: 12862
>Category: pending
>Synopsis: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: gnats-admin
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jul 28 17:20:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:
>Release:
>Organization:
>Environment:
>Description:
> Test procedure:
>
> attached is a tarfile which contains
> the test procedure.
[ ... ]
> all:
> rm -f run thread *.core
> cc -o thread thread.c -lc_r
> cc -o run run.c
> ./run
That should be:
cc -o thread -pthread thread.c
Don't use -lc_r when building threaded apps on FreeBSD because it
also links in libc.
But did you try the patches I sent? I take it you didn't try
them because your test program worked for me with the patches
applied to uthread_fd.c and uthread_init.c.
You said you were also getting other segmentation faults even
after applying Mikhail Teterins patches from the PR filed. What
is the status of that problem?
> >Fix:
>
> This fix does NOT fix the seg-fault itself, but only prevents
> the panic from happening in this legal case.
Dan Eischen
eischen@vigrid.com
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
From lawlopez@cisco.com Wed Jul 28 17:31:40 1999
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Message-Id: <379FA0D0.BE5E5BAD@cisco.com>
Date: Wed, 28 Jul 1999 20:31:12 -0400
From: "Lawrence D. Lopez" <lawlopez@cisco.com>
Sender: lawlopez@cisco.com
To: Daniel Eischen <eischen@vigrid.com>
Cc: FreeBSD-gnats-submit@freebsd.org, jb@cimlogic.com.au,
mi@aldan.algebra.com, msestina@cisco.com, sjlee@cisco.com
Subject: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
References: <199907290013.UAA01121@pcnet1.pcnet.com>
>Number: 12863
>Category: pending
>Synopsis: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: gnats-admin
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jul 28 17:40:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:
>Release:
>Organization:
>Environment:
>Description:
Dan,
I didn't try the patches because mi had
gone home.
The other problem we are having is:
PANIC("Cannot set virtual timer");
in uthread_kern.c
This one really has me stumped.
I will use -pthread in the future.
Larry
Daniel Eischen wrote:
>
> > Test procedure:
> >
> > attached is a tarfile which contains
> > the test procedure.
>
> [ ... ]
>
> > all:
> > rm -f run thread *.core
> > cc -o thread thread.c -lc_r
> > cc -o run run.c
> > ./run
>
> That should be:
>
> cc -o thread -pthread thread.c
>
> Don't use -lc_r when building threaded apps on FreeBSD because it
> also links in libc.
>
> But did you try the patches I sent? I take it you didn't try
> them because your test program worked for me with the patches
> applied to uthread_fd.c and uthread_init.c.
>
> You said you were also getting other segmentation faults even
> after applying Mikhail Teterins patches from the PR filed. What
> is the status of that problem?
>
> > >Fix:
> >
> > This fix does NOT fix the seg-fault itself, but only prevents
> > the panic from happening in this legal case.
>
> Dan Eischen
> eischen@vigrid.com
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
From eischen@vigrid.com Wed Jul 28 17:50:07 1999
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Date: Wed, 28 Jul 1999 20:47:29 -0400 (EDT)
From: Daniel Eischen <eischen@vigrid.com>
To: eischen@vigrid.com, lawlopez@cisco.com
Cc: FreeBSD-gnats-submit@freebsd.org, jb@cimlogic.com.au,
mi@aldan.algebra.com, msestina@cisco.com, sjlee@cisco.com
Subject: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Number: 12865
>Category: pending
>Synopsis: Re: resend: uthread_init.c PANICs in case of (legally) close stdin
>Confidential: yes
>Severity: serious
>Priority: medium
>Responsible: gnats-admin
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jul 28 18:00:01 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:
>Release:
>Organization:
>Environment:
>Description:
> I didn't try the patches because mi had
> gone home.
>
> The other problem we are having is:
>
> PANIC("Cannot set virtual timer");
> in uthread_kern.c
>
> This one really has me stumped.
You're going to have to bite the bullet and upgrade to -stable (or
pull -stable's libc_r and rebuild it on your system). You're
working with an older threads library that has seen a lot of fixes
since 3.1-RELEASE. I believe the panic message you quote is from
before 3.2-RELEASE.
FYI, the message now is:
PANIC("Cannot set scheduling timer");
in uthread_kern.c.
Dan Eischen
eischen@vigrid.com
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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