Date: 23 Aug 1998 20:10:18 -0000 From: "Jos Backus" <Jos.Backus@nl.origin-it.com> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: i386/7729: Progress RDBMS gives suspicious IPC-related warning when run under iBCS2 Message-ID: <19980823201018.28521.qmail@hal.mpn.cp.philips.com>
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>Number: 7729
>Category: i386
>Synopsis: Progress broker is unable to read status of semaphore set
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Aug 23 13:20:00 PDT 1998
>Last-Modified:
>Originator: Jos Backus
>Organization:
Origin B.V.
>Release: FreeBSD 3.0-CURRENT i386
>Environment:
-current as of today
kernel config options:
options SYSVSHM
options SYSVSEM
options SYSVMSG
Progress RDBMS 7.3C13 for SCO 3.2v4.2 (COFF executables)
iBCS2 emulation
>Description:
The Progress broker (_mprosrv) manages access to the physical database
using shared memory and semaphores. Self-service clients attach to the
shared memory db buffers. Semaphores are used to synchronize access.
ktrace'ing the broker process reveals the following:
546 _mprosrv CALL open(0xefbfda44,0x2,0)
546 _mprosrv NAMI "/compat/ibcs2/usr/local/dlc/7.3C13/db/testdb.db"
546 _mprosrv NAMI "/usr/local/dlc/7.3C13/db/testdb.db"
546 _mprosrv RET open 5
546 _mprosrv CALL old.fstat(0x5,0x2,0x1)
546 _mprosrv RET old.fstat 0
546 _mprosrv CALL getfsstat(0xefbfdadc,0xefbfda98)
546 _mprosrv NAMI "testdb.db"
546 _mprosrv RET getfsstat 0
546 _mprosrv CALL sigaltstack(0x1,0x55057439,0x1,0,0)
546 _mprosrv RET sigaltstack -1 errno 2 No such file or directory
546 _mprosrv CALL getfsstat(0xefbfdad4,0xefbfda90)
546 _mprosrv NAMI "testdb.db"
546 _mprosrv RET getfsstat 0
546 _mprosrv CALL sigaltstack(0x1,0x55057439,0x1d,0x7b6,0)
546 _mprosrv RET sigaltstack 131072/0x20000
546 _mprosrv CALL getuid
546 _mprosrv RET getuid 0
546 _mprosrv CALL sigaltstack(0,0x20000,0,0x2,0xefbfdb30)
546 _mprosrv RET sigaltstack -1 errno 14 Bad address # Oops!
546 _mprosrv CALL old.lseek(0x4,0xae57,0)
546 _mprosrv RET old.lseek 44631/0xae57
546 _mprosrv CALL read(0x4,0xefbfd758,0x51)
546 _mprosrv GIO fd 4 read 81 bytes
"%BSYSTEM ERROR: unable to %s semaphore set %s:%c, errno %d. (551)\0\0\
\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
546 _mprosrv RET read 81/0x51
546 _mprosrv CALL fchdir(0xefbfd600)
546 _mprosrv RET fchdir 903898754/0x35e06682
546 _mprosrv CALL fchdir(0x40f114)
546 _mprosrv RET fchdir 903898754/0x35e06682
546 _mprosrv CALL write(0x1,0xefbfd630,0x5a)
546 _mprosrv GIO fd 1 wrote 90 bytes
"18:59:14 SERVER: SYSTEM ERROR: unable to read status of semaphore set \
:\240, errno 14. (551)
"
546 _mprosrv RET write 90/0x5a
546 _mprosrv CALL sigaltstack(0,0x20000,0,0x8,0x1)
546 _mprosrv RET sigaltstack 0
546 _mprosrv CALL sigaltstack(0x2,0x20000,0xefbfdb40,0x1,0)
546 _mprosrv RET sigaltstack 0
546 _mprosrv CALL sigaltstack(0,0x20000,0x1,0x8,0x1)
546 _mprosrv RET sigaltstack 0
>How-To-Repeat:
Start the broker process on a db and watch the screen. Alternatively,
ktrace the broker.
>Fix:
No idea. It does work under BSD/OS's SCO emulation though.
>Audit-Trail:
>Unformatted:
emulation
From: Jos.Backus@nl.origin-it.com
Reply-To: Jos.Backus@nl.origin-it.com
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