4db5723525
* add fuzzers for chrono timepoint and localtime,gmtime * reorder cases to improve throughput mutating the first byte of the input now always results in picking on of the two paths. Before, two of the four possible outcomes resulted in doit() not being invoked. * drop the localtime fuzzer * inline aliases * only fuzz std::chrono::system_clock |
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|---|---|---|
| .. | ||
| .gitignore | ||
| build.sh | ||
| chrono-duration.cc | ||
| chrono-timepoint.cc | ||
| CMakeLists.txt | ||
| float.cc | ||
| fuzzer-common.h | ||
| main.cc | ||
| named-arg.cc | ||
| one-arg.cc | ||
| README.md | ||
| two-args.cc | ||
Running the fuzzers locally
There is a helper script to build the fuzzers, which has only been tested on Debian and Ubuntu linux so far. There should be no problems fuzzing on Windows (using clang>=8) or on Mac, but the script will probably not work out of the box.
Something along
mkdir build
cd build
export CXX=clang++
export CXXFLAGS="-fsanitize=fuzzer-no-link -DFUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION= -g"
cmake .. -DFMT_SAFE_DURATION_CAST=On -DFMT_FUZZ=On -DFMT_FUZZ_LINKMAIN=Off -DFMT_FUZZ_LDFLAGS="-fsanitize=fuzzer"
cmake --build .
should work to build the fuzzers for all platforms which clang supports.
Execute a fuzzer with for instance
cd build
export UBSAN_OPTIONS=halt_on_error=1
mkdir out_chrono
bin/fuzzer_chrono_duration out_chrono