mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
265 lines
6.3 KiB
C++
265 lines
6.3 KiB
C++
/*
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This file is part of solidity.
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solidity 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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solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <libevmasm/AssemblyItem.h>
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#include <libevmasm/SemanticInformation.h>
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#include <libdevcore/CommonData.h>
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#include <libdevcore/FixedHash.h>
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#include <fstream>
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using namespace std;
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using namespace dev;
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using namespace dev::eth;
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AssemblyItem AssemblyItem::toSubAssemblyTag(size_t _subId) const
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{
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assertThrow(data() < (u256(1) << 64), Exception, "Tag already has subassembly set.");
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assertThrow(m_type == PushTag || m_type == Tag, Exception, "");
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AssemblyItem r = *this;
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r.m_type = PushTag;
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r.setPushTagSubIdAndTag(_subId, size_t(data()));
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return r;
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}
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pair<size_t, size_t> AssemblyItem::splitForeignPushTag() const
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{
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assertThrow(m_type == PushTag || m_type == Tag, Exception, "");
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return make_pair(size_t((data()) / (u256(1) << 64)) - 1, size_t(data()));
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}
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void AssemblyItem::setPushTagSubIdAndTag(size_t _subId, size_t _tag)
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{
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assertThrow(m_type == PushTag || m_type == Tag, Exception, "");
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setData(_tag + (u256(_subId + 1) << 64));
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}
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unsigned AssemblyItem::bytesRequired(unsigned _addressLength) const
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{
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switch (m_type)
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{
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case Operation:
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case Tag: // 1 byte for the JUMPDEST
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return 1;
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case PushString:
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return 1 + 32;
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case Push:
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return 1 + max<unsigned>(1, dev::bytesRequired(data()));
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case PushSubSize:
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case PushProgramSize:
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return 1 + 4; // worst case: a 16MB program
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case PushTag:
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case PushData:
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case PushSub:
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return 1 + _addressLength;
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case PushLibraryAddress:
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return 1 + 20;
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default:
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break;
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}
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BOOST_THROW_EXCEPTION(InvalidOpcode());
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}
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int AssemblyItem::arguments() const
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{
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if (type() == Operation)
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return instructionInfo(instruction()).args;
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else
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return 0;
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}
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int AssemblyItem::returnValues() const
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{
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switch (m_type)
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{
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case Operation:
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return instructionInfo(instruction()).ret;
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case Push:
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case PushString:
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case PushTag:
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case PushData:
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case PushSub:
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case PushSubSize:
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case PushProgramSize:
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case PushLibraryAddress:
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return 1;
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case Tag:
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return 0;
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default:;
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}
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return 0;
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}
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bool AssemblyItem::canBeFunctional() const
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{
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switch (m_type)
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{
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case Operation:
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return !SemanticInformation::isDupInstruction(*this) && !SemanticInformation::isSwapInstruction(*this);
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case Push:
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case PushString:
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case PushTag:
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case PushData:
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case PushSub:
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case PushSubSize:
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case PushProgramSize:
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case PushLibraryAddress:
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return true;
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case Tag:
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return false;
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default:;
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}
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return 0;
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}
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string AssemblyItem::getJumpTypeAsString() const
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{
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switch (m_jumpType)
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{
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case JumpType::IntoFunction:
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return "[in]";
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case JumpType::OutOfFunction:
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return "[out]";
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case JumpType::Ordinary:
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default:
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return "";
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}
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}
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string AssemblyItem::toAssemblyText() const
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{
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string text;
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switch (type())
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{
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case Operation:
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{
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assertThrow(isValidInstruction(instruction()), AssemblyException, "Invalid instruction.");
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string name = instructionInfo(instruction()).name;
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transform(name.begin(), name.end(), name.begin(), [](unsigned char _c) { return tolower(_c); });
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text = name;
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break;
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}
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case Push:
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text = toHex(toCompactBigEndian(data(), 1), 1, HexPrefix::Add);
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break;
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case PushString:
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text = string("data_") + toHex(data());
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break;
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case PushTag:
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{
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size_t sub{0};
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size_t tag{0};
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tie(sub, tag) = splitForeignPushTag();
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if (sub == size_t(-1))
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text = string("tag_") + to_string(tag);
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else
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text = string("tag_") + to_string(sub) + "_" + to_string(tag);
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break;
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}
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case Tag:
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assertThrow(data() < 0x10000, AssemblyException, "Declaration of sub-assembly tag.");
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text = string("tag_") + to_string(size_t(data())) + ":";
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break;
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case PushData:
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text = string("data_") + toHex(data());
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break;
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case PushSub:
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text = string("dataOffset(sub_") + to_string(size_t(data())) + ")";
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break;
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case PushSubSize:
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text = string("dataSize(sub_") + to_string(size_t(data())) + ")";
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break;
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case PushProgramSize:
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text = string("bytecodeSize");
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break;
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case PushLibraryAddress:
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text = string("linkerSymbol(\"") + toHex(data()) + string("\")");
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break;
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case UndefinedItem:
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assertThrow(false, AssemblyException, "Invalid assembly item.");
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break;
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default:
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BOOST_THROW_EXCEPTION(InvalidOpcode());
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}
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if (m_jumpType == JumpType::IntoFunction || m_jumpType == JumpType::OutOfFunction)
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{
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text += "\t//";
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if (m_jumpType == JumpType::IntoFunction)
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text += " in";
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else
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text += " out";
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}
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return text;
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}
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ostream& dev::eth::operator<<(ostream& _out, AssemblyItem const& _item)
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{
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switch (_item.type())
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{
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case Operation:
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_out << " " << instructionInfo(_item.instruction()).name;
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if (_item.instruction() == solidity::Instruction::JUMP || _item.instruction() == solidity::Instruction::JUMPI)
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_out << "\t" << _item.getJumpTypeAsString();
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break;
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case Push:
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_out << " PUSH " << hex << _item.data() << dec;
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break;
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case PushString:
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_out << " PushString" << hex << (unsigned)_item.data() << dec;
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break;
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case PushTag:
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{
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size_t subId = _item.splitForeignPushTag().first;
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if (subId == size_t(-1))
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_out << " PushTag " << _item.splitForeignPushTag().second;
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else
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_out << " PushTag " << subId << ":" << _item.splitForeignPushTag().second;
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break;
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}
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case Tag:
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_out << " Tag " << _item.data();
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break;
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case PushData:
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_out << " PushData " << hex << (unsigned)_item.data() << dec;
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break;
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case PushSub:
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_out << " PushSub " << hex << size_t(_item.data()) << dec;
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break;
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case PushSubSize:
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_out << " PushSubSize " << hex << size_t(_item.data()) << dec;
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break;
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case PushProgramSize:
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_out << " PushProgramSize";
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break;
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case PushLibraryAddress:
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{
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string hash(h256((_item.data())).hex());
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_out << " PushLibraryAddress " << hash.substr(0, 8) + "..." + hash.substr(hash.length() - 8);
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break;
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}
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case UndefinedItem:
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_out << " ???";
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break;
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default:
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BOOST_THROW_EXCEPTION(InvalidOpcode());
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}
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return _out;
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}
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