DrCodeCov

Code Coverage client for DynamoRIO

About

Its slightly different from DynamoRIO's drcov in terms of data. DrCodeCov will create for each loaded module a bitmap that is the size of the entire image, it will mark each byte individually which can tell us following things:

• Is instruction start.
• Is instruction part.
• Is branch.
• Unreached.

DrCodeCov will not count hits, this is something I did not need. You can identify which code is executed or if code jumps into parts of instruction operands, this is common in obfuscated code.

DrCov format.

DrCodeCov can output the same format as drcov, specify this via the client option "-format drcov". We however suggest using the binary format for extended details. You will be also able to feed the drcov format directly to Lighthouse, see https://github.com/gaasedelen/lighthouse for more details.

Building

The project currently comes with a Visual Studio 2017 project. Make sure you have set environment variable DYNAMORIO_HOME to your DynamoRIO directory. Open the project in Visual Studio and choose your desired configuration to build.