Some nifty links

From: Eric Roman (
Date: Mon Jun 10 2002 - 16:30:31 PDT

So anyway, it occurred to me earlier today that we might be able to use dynInst
as a cheap runtime mechanism to redirect system calls from applications
at run time without the use of an LD_PRELOAD.  We may be able to use this
thing as a cheap way to bounce non-checkpoint safe library calls through
a runtime wrapper.  I haven't thought too much about the pros and cons,
but it may be an option for some time next year.

Here are some goodies:
The Condor folks explaining their latest tricks.
Basics of the dynInst API
How to bypass the FrameMaker license manager...  (!)
ParaDyn.  It's sort of a parallel version w/ a cutesy Tcl interface built on
top of this.  Turns out that this thing is actually installed on our cluster.
Small world.

More interesting is DPCL.  Dynamic Probes Class Library.  IBMs commercialized
version of the idea.  (Link?)  Might work on the SP?
Dprobes for Linux.  The same idea, but you can now inject kernel code.

I heard a talk on this about a year ago at USENIX.  The guy who developed
it said they used to use it to debug problems with the OS/2 filesystem...
on running systems...  at banks!  Scary stuff.

 - E

Eric Roman  <eroman_at_lbl_dot_gov>     Future Technologies Group
510-486-6420                     Lawrence Berkeley National Laboratory