This is the mail archive of the cygwin-xfree mailing list for the Cygwin XFree86 project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Trying to find a solution for segmentation fault crashes in the most recent x server provided by setup.exe


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.

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://x.cygwin.com/docs/
FAQ:                   http://x.cygwin.com/docs/faq/


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]