solidity/test/tools/ossfuzz/yulProto_diff_ossfuzz.cpp
2019-09-11 10:57:54 +02:00

132 lines
3.1 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 <libyul/backends/evm/EVMDialect.h>
#include <libyul/Exceptions.h>
#include <liblangutil/EVMVersion.h>
#include <liblangutil/SourceReferenceFormatter.h>
#include <test/tools/ossfuzz/yulFuzzerCommon.h>
using namespace yul;
using namespace yul::test::yul_fuzzer;
using namespace std;
using namespace langutil;
using namespace dev;
using namespace yul::test;
namespace
{
void printErrors(ostream& _stream, ErrorList const& _errors)
{
SourceReferenceFormatter formatter(_stream);
for (auto const& error: _errors)
formatter.printExceptionInformation(
*error,
(error->type() == Error::Type::Warning) ? "Warning" : "Error"
);
}
}
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,
dev::solidity::OptimiserSettings::full()
);
try
{
// Parse protobuf mutated YUL code
if (!stack.parseAndAnalyze("source", yul_source) || !stack.parserResult()->code ||
!stack.parserResult()->analysisInfo)
{
printErrors(std::cout, stack.errors());
return;
}
}
catch (Exception const&)
{
return;
}
ostringstream os1;
ostringstream os2;
try
{
yulFuzzerUtil::interpret(
os1,
stack.parserResult()->code,
EVMDialect::strictAssemblyForEVMObjects(langutil::EVMVersion())
);
}
catch (yul::test::StepLimitReached const&)
{
return;
}
catch (yul::test::InterpreterTerminatedGeneric const&)
{
}
stack.optimize();
try
{
yulFuzzerUtil::interpret(
os2,
stack.parserResult()->code,
EVMDialect::strictAssemblyForEVMObjects(langutil::EVMVersion()),
(yul::test::yul_fuzzer::yulFuzzerUtil::maxSteps * 1.5)
);
}
catch (yul::test::InterpreterTerminatedGeneric const&)
{
}
bool isTraceEq = (os1.str() == os2.str());
yulAssert(isTraceEq, "Interpreted traces for optimized and unoptimized code differ.");
return;
}