added fuzzer

Author: iliabylich

Makefile

@@ -31,3 +31,6 @@ clean:
 	mkdir -p $(TARGET_DIR)
 	mkdir -p $(TARGET_DIR)/gen/nodes
 	mkdir -p $(TARGET_DIR)/gen/messages
+
+# fuzzer
+include fuzzer/build.mk

fuzzer/build.mk

@@ -0,0 +1,5 @@
+target/fuzzer: $(STATIC_LIB) $(HEADER) fuzzer/parse.cpp
+	$(CXX) fuzzer/parse.cpp -fsanitize=fuzzer,address $(STATIC_LIB) $(CXXFLAGS) $(CXXEXECFLAGS) $(CXX_SET_OUT_FILE)target/fuzzer
+
+fuzz: target/fuzzer
+	./target/fuzzer -max_len=50 -timeout=10

fuzzer/parse.cpp

@@ -0,0 +1,14 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <string>
+
+#include "../target/lib-ruby-parser.h"
+
+using namespace lib_ruby_parser;
+
+extern "C" int LLVMFuzzerTestOneInput(char *data, size_t size)
+{
+    std::string input(data, size);
+    auto result = ParserResult::from_source(Bytes(input), ParserOptions());
+    return 0;
+}