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harfbuzz/test/fuzzing
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Michiharu Ariza 798e98c47b [CFF] bad offset in Index (#1476) 
* Update hb-ot-cff-common.hh

* fix bug

* bummer fix wasn't hit. refix

* additional sanity check

* Added test cases for oss-fuzz issues 11805, 11806
2018-12-12 21:08:15 -05:00
..
fonts [CFF] bad offset in Index (#1476) 2018-12-12 21:08:15 -05:00
CMakeLists.txt Remove remains of get-codepoint-fuzzer 2018-10-11 17:31:29 -04:00
hb-fuzzer.hh [fuzzer] Separate main() into a new file 2016-12-20 20:50:38 -06:00
hb-shape-fuzzer.cc [fuzzing] Take whatever text we can 2018-11-07 19:12:27 -05:00
hb-subset-fuzzer.cc [fuzzing] Fold get-codepoints-fuzzer into subset-fuzzer 2018-10-11 17:08:12 -04:00
main.cc Minor 2018-10-11 15:42:54 -04:00
Makefile.am [fuzzing] Remove limited-edition build of libraries 2018-11-12 13:21:14 -05:00
README Move all references of old url to the new address (#622) 2017-11-20 14:49:22 -05:00
run-shape-fuzzer-tests.py [fuzzing] Make test runners less verbose 2018-10-29 22:53:16 -07:00
run-subset-fuzzer-tests.py [fuzzing] Make test runners less verbose 2018-10-29 22:53:16 -07:00

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/harfbuzz/harfbuzz/issues/139