Date: Tue, 27 Jul 1999 21:50:32 -0400 (EDT) From: Mikhail Teterin <mi@aldan.algebra.com> To: questions@freebsd.org, stable@freebsd.org Cc: eischen@vigrid.com, jb@cimlogic.com.au Subject: uthread_init.c: 'Cannot get stdio flags' :-( Message-ID: <199907280150.VAA07686@misha.cisco.com>
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Hello!
Under what circumstances could a panic:
Fatal error 'Cannot get stdio flags' at line ? in file
/usr/src/lib/libc_r/uthread/uthread_init.c (errno = ?)
be triggered?
We are trying to replace HylaFAX's ${PREFIX}/sbin/faxsend with our own
application, which is written with threads. The app works fine if called
directly -- from command line. But it dies a horrible death when
actually invoked by HylaFAX's ${PREFIX}/sbin/faxq. Here is a rather
short ktrace produced by replacing faxsend with a shell wrapper:
1157 ktrace RET ktrace 0
1157 ktrace CALL execve(0xbfbfdc23,0xbfbfdaec,0xbfbfdb00)
1157 ktrace NAMI "/usr/local/sbin/faxsend.bin"
1157 faxsend.bin RET execve 0
1157 faxsend.bin CALL getpid
1157 faxsend.bin RET getpid 1157/0x485
1157 faxsend.bin CALL fcntl(0,0x3,0)
1157 faxsend.bin RET fcntl -1 errno 9 Bad file descriptor
1157 faxsend.bin CALL write(0x2,0xbfbfd9ac,0x6e)
1157 faxsend.bin GIO fd 2 wrote 110 bytes
"Fatal error 'Cannot get stdio flags' at line ? in file /usr/src/lib/libc_r/ut\
hread/uthread_init.c (errno = ?)
"
1157 faxsend.bin RET write 110/0x6e
1157 faxsend.bin CALL setitimer(0x2,0xbfbfd968,0)
1157 faxsend.bin RET setitimer 0
1157 faxsend.bin CALL close(0xffffffff)
1157 faxsend.bin RET close -1 errno 9 Bad file descriptor
1157 faxsend.bin CALL close(0xffffffff)
1157 faxsend.bin RET close -1 errno 9 Bad file descriptor
1157 faxsend.bin PSIG SIGSEGV SIG_DFL
First the thread library panics and then segfaults before our main()
even gets a chance to do anything...
The entire app is compiled with "-D_THREADSAFE -pthread" and linked with
"-pthread -static" (tried dynamic too). The only other library -- -lm is
not rebuilt with thread awareness, though.
The problem is perfectly reproducible on FreeBSD 3.0-RELEASE as well as
on 3.2-RELEASE...
Thanks in advance for any hints. Yours sincerely,
-mi
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