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80 lines
2.1 KiB
80 lines
2.1 KiB
/*
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This file is part of cpp-ethereum.
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cpp-ethereum is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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cpp-ethereum is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <memory>
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#include <libdevcore/Exceptions.h>
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#include "ExtVMFace.h"
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namespace dev
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{
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namespace eth
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{
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struct VMException: virtual Exception {};
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struct StepsDone: virtual VMException {};
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struct BreakPointHit: virtual VMException {};
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struct BadInstruction: virtual VMException {};
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struct BadJumpDestination: virtual VMException {};
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struct OutOfGas: virtual VMException {};
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struct StackTooSmall: virtual public VMException { StackTooSmall(u256 _req, u256 _got): req(_req), got(_got) {} u256 req; u256 got; };
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// Convert from a 256-bit integer stack/memory entry into a 160-bit Address hash.
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// Currently we just pull out the right (low-order in BE) 160-bits.
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inline Address asAddress(u256 _item)
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{
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return right160(h256(_item));
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}
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inline u256 fromAddress(Address _a)
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{
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return (u160)_a;
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// h256 ret;
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// memcpy(&ret, &_a, sizeof(_a));
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// return ret;
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}
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/**
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*/
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class VMFace
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{
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public:
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/// Construct VM object.
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explicit VMFace(u256 _gas = 0): m_gas(_gas) {}
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virtual ~VMFace() = default;
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VMFace(VMFace const&) = delete;
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void operator=(VMFace const&) = delete;
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virtual void reset(u256 _gas = 0) noexcept { m_gas = _gas; }
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virtual bytesConstRef go(ExtVMFace& _ext, OnOpFunc const& _onOp = {}, uint64_t _steps = (uint64_t)-1) = 0;
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u256 gas() const { return m_gas; }
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enum Kind: bool { Interpreter, JIT };
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static std::unique_ptr<VMFace> create(Kind, u256 _gas = 0);
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protected:
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u256 m_gas = 0;
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};
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}
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}
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