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From: | Kostya Serebryany |
Subject: | Re: [ft-devel] More fuzzing for freetype2? |
Date: | Wed, 7 Oct 2015 09:01:08 -0700 |
> I've inserted this file into the corpus, and it added 2 more control flow
> edges (out of ~15000).
> Not much, but not zero.
The current function used for the fuzzer doesn't cover GX stuff at
all. We have to extend it step by step to get a better FreeType
coverage.
> The current target function handles any kind of font, so it may be
> rather slow in finding problems specific to a single font type. For
> that we better write a separate target function. Would you like to
> help?
Yes, this would be great! Have a look into the `ftmulti' FreeType
demo program :-) If you want to test named instances only, a simpler
approach of looping over all faces might work also with the recent
2.6.1 version (we have to add to test TTC support anyways to the
fuzzing routine).
Werner
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