kc3-lang/harfbuzz/test/fuzzing

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  Commit

• Author : Garret Rieger
  Date : 2023-06-12 23:38:26
  Hash : db700b56
  Message : [subset] fix fuzzer timeout. Fixes: https://oss-fuzz.com/testcase-detail/6681253479579648. Limits iteration of coverage table during MATH subset to valid glyphs.

• Files
• Makefile.am
• README.md
• fonts
• graphs
• hb-draw-fuzzer.cc
• hb-fuzzer.hh
• hb-repacker-fuzzer.cc
• hb-set-fuzzer.cc
• hb-shape-fuzzer.cc
• hb-subset-fuzzer.cc
• main.cc
• meson.build
• run-draw-fuzzer-tests.py
• run-repacker-fuzzer-tests.py
• run-shape-fuzzer-tests.py
• run-subset-fuzzer-tests.py
• sets

• README.md

• To build the fuzzers with libFuzzer to perform actual fuzzing, build with:

  CXX=clang++ CXXFLAGS="-fsanitize=address,fuzzer-no-link" meson fuzzbuild --default-library=static -Dfuzzer_ldflags="-fsanitize=address,fuzzer"
  
  ninja -Cfuzzbuild
  

  Then, run the fuzzer like this:

  fuzzbuild/test/fuzzing/hb-{shape,draw,subset,set}-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