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

[Ketan Maheshwari]

Is it possible to run the dock_wrap.tcl outside of turbine just as in the
case of static build?




On Tue, Jul 29, 2014 at 10:45 AM, Wozniak, Justin M. <wozniak at mcs.anl.gov>
wrote:

>
> Ok, it's in.  The Swift/K SVN is apparently down so it's not on the web
> yet but see the asciidoc.
>
> On 07/29/2014 10:21 AM, Justin M Wozniak wrote:
>
>
> I thought VALGRIND was in the manual already but it isn't.  I will add it
> now.  I will also talk about our GDB feature.
>
> On 07/29/2014 10:17 AM, Ketan Maheshwari wrote:
>
> 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
>>>
>>>
>>
>
>
> _______________________________________________
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>
>
> --
> Justin M Wozniak
>
>
>
> --
> Justin M Wozniak
>
>
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