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[libFuzzer] better docs for coverage

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268656 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany 2016-05-05 18:07:09 +00:00
parent 2677f2feeb
commit b69177e91e
1 changed files with 8 additions and 5 deletions
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docs/LibFuzzer.rst
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@ -598,12 +598,15 @@ You can get the coverage for your corpus like this:
.. code-block:: console
ASAN_OPTIONS=coverage=1 ./fuzzer CORPUS_DIR -runs=0
ASAN_OPTIONS=coverage=1:html_cov_report=1 ./fuzzer CORPUS_DIR -runs=0
This will run all the tests in the CORPUS_DIR but will not generate any new tests
and dump covered PCs to disk before exiting.
Then you can subtract the set of covered PCs from the set of all instrumented PCs in the binary,
see SanitizerCoverage_ for details.
This will run all tests in the CORPUS_DIR but will not perform any fuzzing.
At the end of the process it will dump a single html file with coverage information.
See SanitizerCoverage_ for details.
You may also use other ways to visualize coverage,
e.g. `llvm-cov <http://llvm.org/docs/CommandGuide/llvm-cov.html>`_, but those will require
you to rebuild the code with different compiler flags.
User-supplied mutators
----------------------