CDE: Using System Call Interposition to Automatically Create ...

Google Tech Talk (more info below) February 11, 2011 Presented by Philip Guo. ABSTRACT It can be painfully difficult to take software that runs on one person’s machine and get it to run on another machine. Online forums and mailing lists are filled with discussions of users’ troubles with compiling, installing, and configuring software and their myriad of dependencies. To eliminate this dependency problem, we created a tool called CDE that uses system call interposition to monitor the execution of x86-Linux programs and package up the Code, Data, and Environment required to run them on other x86-Linux machines, without any installation or configuration. CDE is easy to use: Simply prepend any Linux command (or series of commands) with ‘cde’, and CDE will execute that command, monitor its actions using ptrace, and copy all files it accesses (eg, executables, libraries, plug-ins, scripts, configuration/data files) into a self-contained package. Now you can transfer that package to another Linux machine and run that exact same command without installing anything. In short, if you can run a set of Linux commands on your x86 machine, then CDE enables others to run it on theirs. People in both academia and industry have used CDE to distribute portable software, demo research prototypes, make their scientific experiments reproducible, run software natively on older Linux distros, and quickly deploy experiments to compute clusters. CDE is free and open-source, available here: www …

The Story So Far… 10.000 Years ago The Vasari Empire ruled over countless worlds. Relentless and unstoppable, the Dark Fleet sought to eclipse ever more until a cataclysmic error brought it all to an abrupt end. With their worlds destroyed and their species all but wiped out, the survivors began a desperate race to outrun their past. 1000 Years ago During the formation of the Trade Order, emissaries found a single world orbiting a giant red star on the periphery of what was to become Trader Space. The people of that desert planet were eventually found to be practicing the utmost in scientific and social deviancy; ancient taboos long since assumed to be law. Shocked and disgusted, the Trader Worlds conspired to have their forgotten brethren exiled far outside the territory they were claiming as their own. 10 Years ago The Trader Worlds prospered in an era of lucrative trade and relative peace.

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