Swift Fuzzing README

The Swift Thrift implementation uses LLVM's libFuzzer for fuzzing.

Fuzzer Structure

We currently have several fuzz targets that test different aspects of the Thrift implementation:

• FuzzParseBinary -- Tries to deserialize the code-generated FuzzTest struct from arbitrary input data using the binary protocol
• FuzzRoundtripBinary -- Tries to deserialize a FuzzTest struct and then tests roundtrip serialization/deserialization with the binary protocol
• FuzzParseCompact
• FuzzRoundtripCompact
• FuzzParseJSON
• FuzzRoundtripJSON

The fuzzers need a dummy main() to ensure that compilation in non-fuzzer modes doesn't regress.