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

[Tim Armstrong]

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
>
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>
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