solidity/test/tools/ossfuzz/yulProtoFuzzer.cpp
2020-01-07 15:51:50 +01:00

71 lines
2.0 KiB
C++

/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
#include <fstream>
#include <test/tools/ossfuzz/yulProto.pb.h>
#include <test/tools/fuzzer_common.h>
#include <test/tools/ossfuzz/protoToYul.h>
#include <src/libfuzzer/libfuzzer_macro.h>
#include <libyul/AssemblyStack.h>
#include <liblangutil/EVMVersion.h>
#include <libyul/Exceptions.h>
using namespace solidity;
using namespace solidity::yul;
using namespace solidity::yul::test::yul_fuzzer;
using namespace std;
DEFINE_PROTO_FUZZER(Program const& _input)
{
ProtoConverter converter;
string yul_source = converter.programToString(_input);
if (const char* dump_path = getenv("PROTO_FUZZER_DUMP_PATH"))
{
// With libFuzzer binary run this to generate a YUL source file x.yul:
// PROTO_FUZZER_DUMP_PATH=x.yul ./a.out proto-input
ofstream of(dump_path);
of.write(yul_source.data(), yul_source.size());
}
if (yul_source.size() > 1200)
return;
YulStringRepository::reset();
// AssemblyStack entry point
AssemblyStack stack(
langutil::EVMVersion(),
AssemblyStack::Language::StrictAssembly,
solidity::frontend::OptimiserSettings::full()
);
// Parse protobuf mutated YUL code
if (!stack.parseAndAnalyze("source", yul_source))
return;
yulAssert(stack.errors().empty(), "Parsed successfully but had errors.");
if (!stack.parserResult()->code || !stack.parserResult()->analysisInfo)
return;
// Optimize
stack.optimize();
}