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skia2/site/dev/testing/fuzz.md
Kevin Lubick 20331dea3f Add public repro instructions for repoducing fuzzers 
No-Try: true
Docs-Preview: https://skia.org/?cl=125241
Bug: skia:
Change-Id: I5bf3409a0a7895e636a9b0c6845239bb17b42fa5
Reviewed-on: https://skia-review.googlesource.com/125241
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
Auto-Submit: Kevin Lubick <kjlubick@google.com>
2018-05-02 14:21:17 +00:00

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Reproducing Skia Fuzzes

We assume that you can build Skia. Many fuzzes only reproduce when building with ASAN or MSAN; see those instructions for more details.

All that is needed to reproduce a fuzz downloaded from ClusterFuzz, oss-fuzz or fuzzer.skia.org is to run something like:

out/ASAN/fuzz -b /path/to/downloaded/testcase

The fuzz binary will try its best to guess what the type/name should be based on the name of the testcase. Manually providing type and name is also supported, like:

out/ASAN/fuzz -t filter_fuzz -b /path/to/downloaded/testcase
out/ASAN/fuzz -t api -n RasterN32Canvas -b /path/to/downloaded/testcase

To enumerate all supported types and names, run the following:

out/ASAN/fuzz --help  # will list all types
out/ASAN/fuzz -t api  # will list all names