[sheepdog] [PATCH v2] tests: add a DynamoRIO client for testing the jounaling mechanism

[Liu Yuan]

On Mon, Jul 01, 2013 at 04:58:48PM +0900, Hitoshi Mitake wrote:
> At Mon, 1 Jul 2013 15:53:22 +0800,
> Liu Yuan wrote:
> > 
> > On Mon, Jul 01, 2013 at 03:36:03AM +0900, Hitoshi Mitake wrote:
> > > From: Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>
> > > 
> > > This patch adds a DynamoRIO (often called DR) client for testing the
> > > jounaling mechanism. Because of its nature, the recoverying path is
> > > the most important and hard to test part of the journaling
> > > mechanism. They need to be tested well.
> > > 
> > > But testing targetted recovery paths with traditional tests/ stuff is
> > > hard because:
> > > 1. killing sheeps with kill commands doesn't take into account the
> > >    internal state
> > > 2. inserting exit()s into sheep manually is a painful work
> > > 
> > > So this patch implements a fault injection mechanism with DR. DR
> > > provides rich functionalities of transparent dynamic
> > > instrumentation. One of the functionalities makes inserting function
> > > calls before and after system calls possible. With this mechanism, the
> > > fault injection mechanism lets sheep exit at suitable timings for
> > > testing recovery paths of the journaling.
> > > 
> > > How to use:
> > > 0. preparation
> > >    $ cd
> > >    $ svn checkout http://dynamorio.googlecode.com/svn/trunk/ dynamorio
> > >    $ cd dynamorio
> > >    $ mkdir build
> > >    $ cd build
> > >    $ cmake ..
> > >    $ make
> > > 
> > > (This patch assumes the source code of DR is store in $HOME/dynamorio,
> > > and the build is done in $HOME/dynamorio/build)
> > > 
> > > 1. build the DR client
> > >    $ cd tests/fi/journaling/
> > 
> > what does fi stand for? It is better make it more descriptive.
> 
> This fi stands for "Fault Injection". I thought a directory name like
> "fault_injection" is too long. How do you think? If you like the
> longer one, I'll rename it.

name it as dynamorio is okay. Will usual make fail if I don't install dynamorio?

Thanks
Yuan