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From: "Larry W. Virden" <lvirden@gmail.com>
To: cygwin-xfree@cygwin.com
Subject: Trying to find a solution for segmentation fault crashes in the most recent x server provided by setup.exe
Date: Tue, 22 May 2012 19:19:00 -0000 [thread overview]
Message-ID: <CAPRVdgQO0vu44t+3zmUF7s6_H4Nxuye-fAJRvJhS6_dY6Rbo3w@mail.gmail.com> (raw)
So, after several hours more of investigation, I discovered that while
gdb was installed on my machine, it was not installed on the machine
where we were testing. I installed it there, but the crash still
occurs. The backtrace produced is quite huge - and less useful because
X didn't have any of the debugging symbols in it.
here is a bit of what we are seeing.
We start up the X server. It is configured to use xauth.
We start up a mintty session and an xterm session.
We ssh from these windows to our SPARC Solaris 9 work machines.
We start up, in each window, an in-house written binary application
which makes use of the Tk C libraries.
If we run just 1 mintty, or just 1 xterm, that works.
If we run one of each (which the developers do due to various
features, etc. they wish to leverage), we often - not always - get an
error of the following nature.
GNU gdb (GDB) 7.3.50.20111026-cvs (cygwin-special)
This GDB was configured as "i686-cygwin".
==================== Backtrace ================
Thread 25 (Thread 5368.0x1704):
#0 0x775e000d in ntdll!LdrFindResource_U ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#1 0x7766f896 in ntdll!RtlQueryTimeZoneInformation ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#2 0x70d9aec6 in ?? ()
No symbol table info available.
:
and so on
:
Thread 24 (Thread 5368.0x1b24):
#0 0x775ef8b1 in ntdll!RtlUpdateClonedSRWLock ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#1 0x775ef8b1 in ntdll!RtlUpdateClonedSRWLock ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#2 0x762f0a91 in WaitForSingleObjectEx ()
from /cygdrive/c/Windows/syswow64/KERNELBASE.dll
No symbol table info available.
#3 0x000007a4 in ?? ()
No symbol table info available.
:
and so on
:
Thread 23 (Thread 5368.0x1590):
#0 0x775efd71 in ntdll!RtlFindSetBits ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#1 0x762f31bb in SleepEx () from /cygdrive/c/Windows/syswow64/KERNELBASE.dll
No symbol table info available.
#2 0x00000000 in ?? ()
No symbol table info available.
Thread 22 (Thread 5368.0x1a20):
#0 0x775f013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#1 0x775f013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#2 0x762f0bdd in WaitForMultipleObjectsEx ()
from /cygdrive/c/Windows/syswow64/KERNELBASE.dll
:
and so on
:
Thread 21 (Thread 5368.0x18f4):
#0 0x775ef8e5 in ntdll!RtlUpdateClonedSRWLock ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#1 0x775ef8e5 in ntdll!RtlUpdateClonedSRWLock ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#2 0x762ed348 in ReadFile () from /cygdrive/c/Windows/syswow64/KERNELBASE.dll
No symbol table info available.
#3 0x00000794 in ?? ()
:
and so on
:
many more threads and finally
:
Thread 1 (Thread 5368.0x1bec):
#0 0x775f013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#1 0x775f013d in ntdll!RtlEnableEarlyCriticalSectionEventCreation ()
from /cygdrive/c/Windows/SysWOW64/ntdll.dll
No symbol table info available.
#2 0x762f0bdd in WaitForMultipleObjectsEx ()
from /cygdrive/c/Windows/syswow64/KERNELBASE.dll
No symbol table info available.
#3 0x00000003 in ?? ()
No symbol table info available.
:
and so on
:
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
==================== Backtrace End ============
[ 3569.256] Segmentation fault at address 0x65682e91
[ 3569.256]
Fatal server error:
[ 3569.256] Caught signal 11 (Segmentation fault). Server aborting
[ 3569.256]
[ 3569.256] Server terminated with error (1). Closing log file.
Note that in several of the skipped portions above there were lines such as
Backtrace stopped: Not enough registers or memory available to unwind further
The log file is 45K, so I didn't include it completely until I hear
back that someone would find it useful
--
Tcl - The glue of a new generation. http://wiki.tcl.tk/
Larry W. Virden
http://www.facebook.com/lvirden/
Even if explicitly stated to the contrary, nothing in this posting
should be construed as representing my employer's opinions.
--
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next reply other threads:[~2012-05-22 19:19 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-22 19:19 Larry W. Virden [this message]
2012-05-23 12:50 ` Larry W. Virden
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