You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
147 lines
3.4 KiB
147 lines
3.4 KiB
/*
|
|
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/>.
|
|
*/
|
|
|
|
// SmartVM is only available if EVM JIT is enabled
|
|
#if ETH_EVMJIT
|
|
|
|
#include "SmartVM.h"
|
|
#include <unordered_map>
|
|
#include <thread>
|
|
#include <mutex>
|
|
#include <condition_variable>
|
|
#include <queue>
|
|
#include <libdevcore/Log.h>
|
|
#include <libdevcore/SHA3.h>
|
|
#include <libdevcore/Guards.h>
|
|
#include <evmjit/JIT.h>
|
|
#include <evmjit/libevmjit-cpp/Utils.h>
|
|
#include "VMFactory.h"
|
|
|
|
namespace dev
|
|
{
|
|
namespace eth
|
|
{
|
|
namespace
|
|
{
|
|
struct JitInfo: LogChannel { static const char* name() { return "JIT"; }; static const int verbosity = 11; };
|
|
|
|
using HitMap = std::unordered_map<h256, uint64_t>;
|
|
|
|
HitMap& getHitMap()
|
|
{
|
|
static HitMap s_hitMap;
|
|
return s_hitMap;
|
|
}
|
|
|
|
struct JitTask
|
|
{
|
|
bytes code;
|
|
h256 codeHash;
|
|
};
|
|
|
|
class JitWorker
|
|
{
|
|
bool m_finished = false;
|
|
std::mutex x_mutex;
|
|
std::condition_variable m_cv;
|
|
std::thread m_worker;
|
|
std::queue<JitTask> m_queue;
|
|
|
|
bool pop(JitTask& o_task)
|
|
{
|
|
std::unique_lock<std::mutex> lock{x_mutex};
|
|
m_cv.wait(lock, [this]{ return m_finished || !m_queue.empty(); });
|
|
if (m_finished)
|
|
return false;
|
|
|
|
assert(!m_queue.empty());
|
|
o_task = std::move(m_queue.front());
|
|
m_queue.pop();
|
|
return true;
|
|
}
|
|
|
|
void work()
|
|
{
|
|
clog(JitInfo) << "JIT worker started.";
|
|
JitTask task;
|
|
while (pop(task))
|
|
{
|
|
clog(JitInfo) << "Compilation... " << task.codeHash;
|
|
evmjit::JIT::compile(task.code.data(), task.code.size(), eth2jit(task.codeHash));
|
|
clog(JitInfo) << " ...finished " << task.codeHash;
|
|
}
|
|
clog(JitInfo) << "JIT worker finished.";
|
|
}
|
|
|
|
public:
|
|
JitWorker() noexcept: m_worker([this]{ work(); })
|
|
{}
|
|
|
|
~JitWorker()
|
|
{
|
|
DEV_GUARDED(x_mutex)
|
|
m_finished = true;
|
|
m_cv.notify_one();
|
|
m_worker.join();
|
|
}
|
|
|
|
void push(JitTask&& _task)
|
|
{
|
|
DEV_GUARDED(x_mutex)
|
|
m_queue.push(std::move(_task));
|
|
m_cv.notify_one();
|
|
}
|
|
};
|
|
}
|
|
|
|
bytesConstRef SmartVM::execImpl(u256& io_gas, ExtVMFace& _ext, OnOpFunc const& _onOp)
|
|
{
|
|
auto codeHash = _ext.codeHash;
|
|
auto vmKind = VMKind::Interpreter; // default VM
|
|
|
|
// Jitted EVM code already in memory?
|
|
if (evmjit::JIT::isCodeReady(eth2jit(codeHash)))
|
|
{
|
|
clog(JitInfo) << "JIT: " << codeHash;
|
|
vmKind = VMKind::JIT;
|
|
}
|
|
else
|
|
{
|
|
static JitWorker s_worker;
|
|
|
|
// Check EVM code hit count
|
|
static const uint64_t c_hitTreshold = 2;
|
|
auto& hits = getHitMap()[codeHash];
|
|
++hits;
|
|
if (hits == c_hitTreshold)
|
|
{
|
|
clog(JitInfo) << "Schedule: " << codeHash;
|
|
s_worker.push({_ext.code, codeHash});
|
|
}
|
|
clog(JitInfo) << "Interpreter: " << codeHash;
|
|
}
|
|
|
|
// TODO: Selected VM must be kept only because it returns reference to its internal memory.
|
|
// VM implementations should be stateless, without escaping memory reference.
|
|
m_selectedVM = VMFactory::create(vmKind);
|
|
return m_selectedVM->execImpl(io_gas, _ext, _onOp);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|