[ExM Users] debugging suggestions for non-static main-wrap segfault

[Ketan Maheshwari]

Thanks! Seems turbine script already had a placeholder for Valgrind so I
tried that and from the output, it seems tcl libraries are causing segfault
but I may be wrong. Attached is the Valgrind output.



On Tue, Jul 29, 2014 at 10:05 AM, Tim Armstrong <tim.g.armstrong at gmail.com>
wrote:

>  I don't have any particular insight into the cause of the segfault, I
> can help with the debugger though.
>
> You need to point gdb at the tclsh that is being used by turbine (which is
> just a shell script).  You can locate the correct tclsh by looking at TCLSH
> in scripts/turbine-config.sh in the turbine install directory.
>
>  - TIm
>
>
> On Tue, Jul 29, 2014 at 10:00 AM, Ketan Maheshwari <ketan at mcs.anl.gov>
> wrote:
>
>> Hi,
>>
>>  Trying to main-wrap DOCK 6.6 application for ATPESC, I get the build
>> right (seems) but things fail at runtime giving segfault:
>>
>>  $ turbine -n 4 user-code.tcl
>>
>>
>> ===================================================================================
>> =   BAD TERMINATION OF ONE OF YOUR APPLICATION PROCESSES
>> =   EXIT CODE: 139
>> =   CLEANING UP REMAINING PROCESSES
>> =   YOU CAN IGNORE THE BELOW CLEANUP MESSAGES
>>
>> ===================================================================================
>> YOUR APPLICATION TERMINATED WITH THE EXIT STRING: Segmentation fault
>> (signal 11)
>> This typically refers to a problem with your application.
>> Please see the FAQ page for debugging suggestions
>>
>>  This is on MCS machine. Any suggestion to debug this? I tried gdb but
>> it gives:
>>
>>   "/nfs2/ketan/exm-install/turbine/bin/turbine": not in executable
>> format: File format not recognized
>>
>>  With strace, I see some signs of missing files but not sure if that is
>> the cause of segfault. Attached is the strace output of:
>>
>>  strace -o strace.out turbine -n 4 user-code.tcl
>>
>>  The code has some MPI and pthread elements but does not use them as far
>> as I understand.
>>
>>  Thanks for any suggestions.
>>
>>  --
>> Ketan
>>
>> _______________________________________________
>> ExM-user mailing list
>> ExM-user at lists.mcs.anl.gov
>> https://lists.mcs.anl.gov/mailman/listinfo/exm-user
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/exm-user/attachments/20140729/17adc317/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: valgrind.out
Type: application/octet-stream
Size: 13107 bytes
Desc: not available
URL: <http://lists.mcs.anl.gov/pipermail/exm-user/attachments/20140729/17adc317/attachment.obj>