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/*
This file is part of cpp-ethereum.
cpp-ethereum 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.
cpp-ethereum 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 cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file createRandomTest.cpp
* @author Christoph Jentzsch <jentzsch.simulationsoftware@gmail.com>
* @date 2014
* Creating a random virtual machine test.
*/
#include <string>
#include <iostream>
#include <chrono>
#include <boost/random.hpp>
#include <boost/filesystem/path.hpp>
#pragma GCC diagnostic ignored "-Wunused-parameter"
#include <json_spirit/json_spirit.h>
#include <json_spirit/json_spirit_reader_template.h>
#include <json_spirit/json_spirit_writer_template.h>
#include <libdevcore/CommonIO.h>
#include <libdevcore/CommonData.h>
#include <libevmface/Instruction.h>
#include "vm.h"
using namespace std;
using namespace json_spirit;
using namespace dev;
void doMyTests(json_spirit::mValue& v);
int main(int argc, char *argv[])
{
if (argc != 2)
{
cout << "usage: createRandomTest <filename>\n";
return 0;
}
// create random code
boost::random::mt19937 gen;
auto now = chrono::steady_clock::now().time_since_epoch();
auto timeSinceEpoch = chrono::duration_cast<chrono::nanoseconds>(now).count();
gen.seed(static_cast<unsigned int>(timeSinceEpoch));
boost::random::uniform_int_distribution<> lengthOfCodeDist(2, 16);
boost::random::uniform_int_distribution<> opcodeDist(0, 255);
boost::random::variate_generator<boost::mt19937&,
boost::random::uniform_int_distribution<> > randGen(gen, opcodeDist);
int lengthOfCode = lengthOfCodeDist(gen);
string randomCode;
for (int i = 0; i < lengthOfCode; ++i)
randomCode += toHex(toCompactBigEndian(randGen()));
// read template test file
mValue v;
boost::filesystem::path p(__FILE__);
boost::filesystem::path dir = p.parent_path();
string s = asString(contents(dir.string() + "/randomTestFiller.json"));
read_string(s, v);
// insert new random code
v.get_obj().find("randomVMtest")->second.get_obj().find("pre")->second.get_obj().begin()->second.get_obj()["code"] = "0x" + randomCode;
// execute code in vm
doMyTests(v);
// write new test
string filename = argv[1];
writeFile(filename, asBytes(json_spirit::write_string(v, true)));
return 0;
}
void doMyTests(json_spirit::mValue& v)
{
for (auto& i: v.get_obj())
{
mObject& o = i.second.get_obj();
assert(o.count("env") > 0);
assert(o.count("pre") > 0);
assert(o.count("exec") > 0);
eth::VM vm;
test::FakeExtVM fev;
fev.importEnv(o["env"].get_obj());
fev.importState(o["pre"].get_obj());
o["pre"] = mValue(fev.exportState());
fev.importExec(o["exec"].get_obj());
if (!fev.code)
{
fev.thisTxCode = get<3>(fev.addresses.at(fev.myAddress));
fev.code = &fev.thisTxCode;
}
vm.reset(fev.gas);
bytes output;
try
{
output = vm.go(fev).toBytes();
}
catch (Exception const& _e)
{
cnote << "VM did throw an exception: " << diagnostic_information(_e);
}
catch (std::exception const& _e)
{
cnote << "VM did throw an exception: " << _e.what();
}
// delete null entries in storage for the sake of comparison
for (auto &a: fev.addresses)
{
vector<u256> keystoDelete;
for (auto &s: get<2>(a.second))
{
if (s.second == 0)
keystoDelete.push_back(s.first);
}
for (auto const key: keystoDelete )
{
get<2>(a.second).erase(key);
}
}
o["env"] = mValue(fev.exportEnv());
o["exec"] = mValue(fev.exportExec());
o["post"] = mValue(fev.exportState());
o["callcreates"] = fev.exportCallCreates();
o["out"] = "0x" + toHex(output);
fev.push(o, "gas", vm.gas());
}
}
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