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HarfBuzz text shaping engine http://harfbuzz.github.io/
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harfbuzz/test/fuzzing
Behdad Esfahbod a0688e8e7b
Ouch, finish previous change 		8 years ago
..
Makefile.am Ouch, finish previous change 8 years ago
README Enable building a bounded version of the library for fuzzing 9 years ago
hb-fuzzer.cc Ouch, finish previous change 8 years ago
hb-fuzzer.hh [fuzzer] Separate main() into a new file 8 years ago
main.cc [fuzzer] Separate main() into a new file 8 years ago

README 

In order to build the fuzzer one needs to build HarfBuzz and
harfbuzz/test/fuzzing/hb-fuzzer.cc with:
  - Using the most recent Clang
  - With -fsanitize=address (or =undefined, or a combination)
  - With -fsanitize-coverage=edge[,8bit-counters,trace-cmp]
  - With various defines that limit worst case exponential behavior.
    See FUZZING_CPPFLAGS in harfbuzz/src/Makefile.am for the list.
  - link against libFuzzer

To run the fuzzer one needs to first obtain a test corpus as a directory
containing interesting fonts.  A good starting point is inside
harfbuzz/test/shaping/fonts/fonts/.
Then, run the fuzzer like this:
   ./hb-fuzzer -max_len=2048 CORPUS_DIR
Where max_len specifies the maximal length of font files to handle.
The smaller the faster.

For more details consult the following locations:
  - http://llvm.org/docs/LibFuzzer.html or
  - https://github.com/google/libfuzzer-bot/tree/master/harfbuzz
  - https://github.com/behdad/harfbuzz/issues/139