Function createParserFuzzer

lib/nodejs/test/fuzz/fuzz_common.js:31–58

* Creates a parser fuzzer function for a specific protocol * @param {Function} protocolFactory - The Thrift protocol factory function * @param {boolean} [readMessageBegin=false] - Whether to call readMessageBegin before reading the test instance * This is needed for protocols that do not support

(protocolFactory, readMessageBegin = false)

 * @returns {Function} A fuzzer function that can be used with Jazzer.js
 */
function createParserFuzzer(protocolFactory, readMessageBegin = false) {
  return function fuzz(data) {
    if (data.length < 2) {
      return;
    }

    try {
      // Set up transport with input data
      const transport = new thrift.TFramedTransport(data);
      const protocol = protocolFactory(transport);
      const testInstance = new FuzzTest.FuzzTest();
      if (readMessageBegin) {
        protocol.readMessageBegin();
      }
      testInstance[Symbol.for("read")](protocol);
    } catch (e) {
      if (
        !(
          e.name === "InputBufferUnderrunError" ||
          e.name === "TProtocolException"
        )
      ) {
        // TODO: Are other exceptions expected?
        // console.log(e);
      }
    }
  };
}

/**
 * Creates a roundtrip fuzzer function for a specific protocol