Boost json has support for fuzzing. Clang/libFuzzer is used.

Execute the fuzzing/fuzz.sh script. You need clang++ installed. The fuzzer script will start fuzzing for a limited time, interrupt it if you wish.

There are several fuzzers, to exercise different parts of the api, following the usage examples in the documentation.

Either modify the fuzz.sh script, or run it to build the fuzzer and then issue:

mkdir -p out
./fuzzer_basic_parser out

Given a test case testcase.json, build the fuzzer and execute it with the test file:

./fuzzer_basic_parser testcase.json