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Add public repro instructions for repoducing fuzzers

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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>
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Kevin Lubick 2018-05-02 10:14:38 -04:00 committed by Skia Commit-Bot
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Reproducing Skia Fuzzes
=======================
We assume that you can [build Skia](/user/build). Many fuzzes only reproduce
when building with ASAN or MSAN; see [those instructions for more details](./xsan).
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