Copyright (c) 2010 Massachusetts Institute of Technology

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use,
copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following
conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

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About Umbra

Umbra is an efficient and scalable memory shadowing framework built on
top of DynamoRIO, a dynamic instrumentation tool platform. Umbra
employs a novel translation scheme, which supports efficient mapping
from application data to shadow metadata for 64-bit
applications. Umbra's translation scheme does not rely on any platform 
features and is not restricted to any specific shadow memory size. 

The Umbra home page:

  http://people.csail.mit.edu/qin_zhao/umbra/

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Quickstart instructions for building and running Umbra:

CMake is required for building Umbra.

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1. download and install DynamoRIO from www.dynamorio.org
   assume DynamoRIO is installed at /path/to/dynamorio/

2. download and extract Umbra from http://people.csail.mit.edu/qin_zhao/umbra/

3. extract and build Umbra
   - tar xzf umbra-linux-0.2.tgz
   - cd umbra-linux-0.2
   - mkdir build
   - cd build
   - ccmake ../  
     * press c to configure
     * press e to exit help
     * put /path/to/dynamorio/cmake at DynamoRIO_DIR
     * set one and only one CLIENT ON e.g. UMBRA_CLIENT_SHARE_COUNT
     * press c for configuration
     * press g to generate makefile and quit
   - make
   - /path/to/dynamorio/bin64/drrun -ops "-thread_private -max_bb_instrs 512 -no_finite_bb_cache -no_finite_trace_cache" -client /path/to/umbra/build/bin/libumbra.so 0 "" ls

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Getting help and reporting bugs:

This is a test release.
Please email qin.zhao@gmail.com for any issues of using Umbra.

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