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SGX Code Coverage Support

Prerequisite: lcov. Install via sudo apt-get install lcov

One shot

$ make COV=1
$ cd bin && ./app && cd ..
$ make gen_cov_html

Then open html/index.html, where amazing happens!

sgx_cov supports xargo as well:

$ XARGO_SGX=1 make COV=1
$ cd bin && ./app && cd ..
$ XARGO_SGX=1 make gen_cov_html

The Magic

  • Enable feature global_exit for sgx_urts
  • Inject an on exit function using global_dtors_object! macro, and invoke sgx_cov::cov_writeout()
  • .gcno would be generated during compile time at Target_Dir
  • .gcna would be generated during run time at Target_dir
  • make gen_cov_html would process .gcno and .gcna and generate html results.

More about the magic

To be continued ...