[Bug testsuite/16493] Improve bkl.stp to add backtrace

[dsmith at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=16493

David Smith <dsmith at redhat dot com> changed:

           What    |Removed                     |Added
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                 CC|                            |dsmith at redhat dot com

--- Comment #1 from David Smith <dsmith at redhat dot com> ---
Sorry for taking so long to look at this. I like the idea of your patch, but we
can simplify it a bit.

We can remove all the command line processing, and just use stap command line
processing with the ability to set global variables from the command line using
'-G'. Here's an example of how it works:

====
# stap -e 'global backtrace=-1; probe begin { printf("%d\n", backtrace); exit()
}' -G backtrace=100
100
====

Thanks again for the patch.

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