proto fuzzer: Add source files necessary to compile proto fuzzer

1 files changed, 44 insertions, 0 deletions

diff --git a/oss-fuzz/mruby_proto_fuzzer.cpp b/oss-fuzz/mruby_proto_fuzzer.cpp
new file mode 100644
index 000000000..2999c5470
--- /dev/null
+++ b/oss-fuzz/mruby_proto_fuzzer.cpp
@@ -0,0 +1,44 @@
+#include <string>
+#include <iostream>
+#include <fstream>
+
+#include <mruby.h>
+#include <mruby/compile.h>
+
+#include "libprotobuf-mutator/src/libfuzzer/libfuzzer_macro.h"
+#include "ruby.pb.h"
+#include "proto_to_ruby.h"
+
+using namespace ruby_fuzzer;
+using namespace std;
+
+int FuzzRB(const uint8_t *Data, size_t size) {
+	mrb_value v;
+	mrb_state *mrb = mrb_open();
+	if (!mrb)
+		return 0;
+
+	char *code = (char *)malloc(size+1);
+	if (!code)
+		return 0;
+	memcpy(code, Data, size);
+	code[size] = '\0';
+
+	if (const char *dump_path = getenv("PROTO_FUZZER_DUMP_PATH")) {
+		// With libFuzzer binary run this to generate an RB file x.rb:
+		// PROTO_FUZZER_DUMP_PATH=x.rb ./a.out proto-input
+		std::ofstream of(dump_path);
+		of.write(code, size);
+	}
+	v = mrb_load_string(mrb, code);
+	mrb_close(mrb);
+
+	free(code);
+	return 0;
+}
+
+DEFINE_PROTO_FUZZER(const Function &function) {
+	protoConverter converter;
+	auto s = converter.FunctionToString(function);
+	(void)FuzzRB((const uint8_t*)s.data(), s.size());
+}