2015-02-25 14:14:22 +00:00
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/*
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2016-11-18 23:13:20 +00:00
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This file is part of solidity.
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2015-02-25 14:14:22 +00:00
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2016-11-18 23:13:20 +00:00
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solidity is free software: you can redistribute it and/or modify
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2015-02-25 14:14:22 +00:00
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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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2016-11-18 23:13:20 +00:00
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solidity is distributed in the hope that it will be useful,
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2015-02-25 14:14:22 +00:00
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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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2016-11-18 23:13:20 +00:00
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along with solidity. If not, see <http://www.gnu.org/licenses/>.
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2015-02-25 14:14:22 +00:00
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*/
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2020-07-17 14:54:12 +00:00
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// SPDX-License-Identifier: GPL-3.0
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2015-02-25 14:14:22 +00:00
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/**
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* @author Christian <c@ethdev.com>
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* @date 2015
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2016-07-14 20:56:45 +00:00
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* LValues for use in the expression compiler.
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2015-02-25 14:14:22 +00:00
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*/
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2015-10-20 22:21:52 +00:00
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#include <libsolidity/codegen/LValue.h>
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2018-12-17 16:06:11 +00:00
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2015-10-20 22:21:52 +00:00
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#include <libsolidity/ast/AST.h>
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2018-12-17 16:06:11 +00:00
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#include <libsolidity/ast/Types.h>
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2015-10-20 22:21:52 +00:00
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#include <libsolidity/codegen/CompilerUtils.h>
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2018-12-17 16:06:11 +00:00
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#include <libevmasm/Instruction.h>
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2015-02-25 14:14:22 +00:00
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2022-05-04 21:55:40 +00:00
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#include <libsolutil/StackTooDeepString.h>
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2019-12-11 16:31:36 +00:00
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using namespace solidity;
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using namespace solidity::evmasm;
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using namespace solidity::frontend;
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using namespace solidity::langutil;
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using namespace solidity::util;
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2015-02-25 14:14:22 +00:00
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2015-09-21 16:55:58 +00:00
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StackVariable::StackVariable(CompilerContext& _compilerContext, VariableDeclaration const& _declaration):
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2019-04-15 13:33:39 +00:00
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LValue(_compilerContext, _declaration.annotation().type),
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2015-08-31 16:44:29 +00:00
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m_baseStackOffset(m_context.baseStackOffsetOfVariable(_declaration)),
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2015-10-14 13:19:50 +00:00
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m_size(m_dataType->sizeOnStack())
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2015-02-25 14:14:22 +00:00
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{
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}
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2015-02-25 19:27:55 +00:00
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void StackVariable::retrieveValue(SourceLocation const& _location, bool) const
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2015-02-25 14:14:22 +00:00
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{
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unsigned stackPos = m_context.baseToCurrentStackOffset(m_baseStackOffset);
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2015-07-15 14:32:47 +00:00
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if (stackPos + 1 > 16) //@todo correct this by fetching earlier or moving to memory
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2015-06-05 23:04:55 +00:00
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BOOST_THROW_EXCEPTION(
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2020-07-01 07:46:06 +00:00
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StackTooDeepError() <<
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2015-06-05 23:04:55 +00:00
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errinfo_sourceLocation(_location) <<
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2022-05-04 21:55:40 +00:00
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util::errinfo_comment(util::stackTooDeepString)
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2015-06-05 23:04:55 +00:00
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);
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2015-06-30 09:54:51 +00:00
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solAssert(stackPos + 1 >= m_size, "Size and stack pos mismatch.");
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2015-02-25 14:14:22 +00:00
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for (unsigned i = 0; i < m_size; ++i)
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2016-04-04 11:41:35 +00:00
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m_context << dupInstruction(stackPos + 1);
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2015-02-25 14:14:22 +00:00
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}
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2015-02-25 19:27:55 +00:00
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void StackVariable::storeValue(Type const&, SourceLocation const& _location, bool _move) const
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2015-02-25 14:14:22 +00:00
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{
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unsigned stackDiff = m_context.baseToCurrentStackOffset(m_baseStackOffset) - m_size + 1;
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if (stackDiff > 16)
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2015-06-05 23:04:55 +00:00
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BOOST_THROW_EXCEPTION(
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2020-07-01 07:46:06 +00:00
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StackTooDeepError() <<
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2015-06-05 23:04:55 +00:00
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errinfo_sourceLocation(_location) <<
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2022-05-04 21:55:40 +00:00
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util::errinfo_comment(util::stackTooDeepString)
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2015-06-05 23:04:55 +00:00
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);
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2015-02-25 14:14:22 +00:00
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else if (stackDiff > 0)
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for (unsigned i = 0; i < m_size; ++i)
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2016-04-04 11:41:35 +00:00
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m_context << swapInstruction(stackDiff) << Instruction::POP;
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2015-02-25 14:14:22 +00:00
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if (!_move)
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retrieveValue(_location);
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}
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2015-02-25 19:27:55 +00:00
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void StackVariable::setToZero(SourceLocation const& _location, bool) const
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2015-02-25 14:14:22 +00:00
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{
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2015-10-14 13:19:50 +00:00
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CompilerUtils(m_context).pushZeroValue(*m_dataType);
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storeValue(*m_dataType, _location, true);
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2015-02-25 14:14:22 +00:00
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}
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2015-06-25 15:51:01 +00:00
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MemoryItem::MemoryItem(CompilerContext& _compilerContext, Type const& _type, bool _padded):
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2015-10-14 13:19:50 +00:00
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LValue(_compilerContext, &_type),
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2015-06-25 15:51:01 +00:00
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m_padded(_padded)
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{
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}
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void MemoryItem::retrieveValue(SourceLocation const&, bool _remove) const
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{
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2015-10-14 13:19:50 +00:00
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if (m_dataType->isValueType())
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2015-06-25 15:51:01 +00:00
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{
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if (!_remove)
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::DUP1;
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2015-10-14 13:19:50 +00:00
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CompilerUtils(m_context).loadFromMemoryDynamic(*m_dataType, false, m_padded, false);
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2015-06-25 15:51:01 +00:00
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}
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else
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::MLOAD;
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2015-06-25 15:51:01 +00:00
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}
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void MemoryItem::storeValue(Type const& _sourceType, SourceLocation const&, bool _move) const
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{
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CompilerUtils utils(m_context);
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2015-10-14 13:19:50 +00:00
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if (m_dataType->isValueType())
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2015-06-25 15:51:01 +00:00
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{
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solAssert(_sourceType.isValueType(), "");
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2015-08-31 16:44:29 +00:00
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utils.moveIntoStack(_sourceType.sizeOnStack());
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2015-10-14 13:19:50 +00:00
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utils.convertType(_sourceType, *m_dataType, true);
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2015-06-25 15:51:01 +00:00
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if (!_move)
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{
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2015-10-14 13:19:50 +00:00
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utils.moveToStackTop(m_dataType->sizeOnStack());
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2015-11-16 17:32:21 +00:00
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utils.copyToStackTop(1 + m_dataType->sizeOnStack(), m_dataType->sizeOnStack());
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}
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if (!m_padded)
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{
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solAssert(m_dataType->calldataEncodedSize(false) == 1, "Invalid non-padded type.");
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2021-09-28 12:21:39 +00:00
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solAssert(m_dataType->category() != Type::Category::UserDefinedValueType, "");
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2015-11-16 17:32:21 +00:00
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if (m_dataType->category() == Type::Category::FixedBytes)
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2016-04-04 11:41:35 +00:00
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m_context << u256(0) << Instruction::BYTE;
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m_context << Instruction::SWAP1 << Instruction::MSTORE8;
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2015-11-16 17:32:21 +00:00
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}
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else
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{
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utils.storeInMemoryDynamic(*m_dataType, m_padded);
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::POP;
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2015-06-25 15:51:01 +00:00
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}
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}
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else
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{
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2016-11-14 20:41:58 +00:00
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solUnimplementedAssert(_sourceType == *m_dataType, "Conversion not implemented for assignment to memory.");
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2015-06-25 15:51:01 +00:00
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2015-10-14 13:19:50 +00:00
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solAssert(m_dataType->sizeOnStack() == 1, "");
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2015-06-25 15:51:01 +00:00
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if (!_move)
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::DUP2 << Instruction::SWAP1;
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2015-06-25 15:51:01 +00:00
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// stack: [value] value lvalue
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// only store the reference
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::MSTORE;
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2015-06-25 15:51:01 +00:00
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}
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}
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void MemoryItem::setToZero(SourceLocation const&, bool _removeReference) const
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{
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CompilerUtils utils(m_context);
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2018-10-17 20:17:33 +00:00
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solAssert(_removeReference, "");
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2015-10-14 13:19:50 +00:00
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utils.pushZeroValue(*m_dataType);
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utils.storeInMemoryDynamic(*m_dataType, m_padded);
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::POP;
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2015-06-25 15:51:01 +00:00
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}
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2015-02-25 14:14:22 +00:00
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2020-03-10 13:30:04 +00:00
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ImmutableItem::ImmutableItem(CompilerContext& _compilerContext, VariableDeclaration const& _variable):
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LValue(_compilerContext, _variable.annotation().type), m_variable(_variable)
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{
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solAssert(_variable.immutable(), "");
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}
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void ImmutableItem::retrieveValue(SourceLocation const&, bool) const
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{
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2021-09-23 15:18:13 +00:00
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solUnimplementedAssert(m_dataType->isValueType());
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2021-08-05 15:06:19 +00:00
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if (m_context.runtimeContext())
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CompilerUtils(m_context).loadFromMemory(
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static_cast<unsigned>(m_context.immutableMemoryOffset(m_variable)),
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2021-09-28 14:41:32 +00:00
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*m_dataType,
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false,
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true
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2021-08-05 15:06:19 +00:00
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);
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else
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for (auto&& slotName: m_context.immutableVariableSlotNames(m_variable))
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m_context.appendImmutable(slotName);
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2020-03-10 13:30:04 +00:00
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}
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void ImmutableItem::storeValue(Type const& _sourceType, SourceLocation const&, bool _move) const
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{
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CompilerUtils utils(m_context);
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2021-09-23 15:18:13 +00:00
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solUnimplementedAssert(m_dataType->isValueType());
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2020-03-10 13:30:04 +00:00
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solAssert(_sourceType.isValueType(), "");
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utils.convertType(_sourceType, *m_dataType, true);
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m_context << m_context.immutableMemoryOffset(m_variable);
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if (_move)
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utils.moveIntoStack(m_dataType->sizeOnStack());
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else
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utils.copyToStackTop(m_dataType->sizeOnStack() + 1, m_dataType->sizeOnStack());
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2021-09-28 14:41:32 +00:00
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utils.storeInMemoryDynamic(*m_dataType);
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2020-03-10 13:30:04 +00:00
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m_context << Instruction::POP;
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}
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2023-06-05 12:12:56 +00:00
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void ImmutableItem::setToZero(SourceLocation const&, bool _removeReference) const
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2020-03-10 13:30:04 +00:00
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{
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2023-06-05 12:12:56 +00:00
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CompilerUtils utils(m_context);
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solUnimplementedAssert(m_dataType->isValueType());
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solAssert(_removeReference);
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m_context << m_context.immutableMemoryOffset(m_variable);
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utils.pushZeroValue(*m_dataType);
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utils.storeInMemoryDynamic(*m_dataType);
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m_context << Instruction::POP;
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2020-03-10 13:30:04 +00:00
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}
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2015-09-21 16:55:58 +00:00
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StorageItem::StorageItem(CompilerContext& _compilerContext, VariableDeclaration const& _declaration):
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2015-09-16 14:56:30 +00:00
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StorageItem(_compilerContext, *_declaration.annotation().type)
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2015-02-25 14:14:22 +00:00
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{
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2020-04-02 06:34:20 +00:00
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solAssert(!_declaration.immutable(), "");
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2015-08-31 16:44:29 +00:00
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auto const& location = m_context.storageLocationOfVariable(_declaration);
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2015-03-13 18:48:24 +00:00
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m_context << location.first << u256(location.second);
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2015-02-25 14:14:22 +00:00
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}
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2015-02-25 19:27:55 +00:00
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StorageItem::StorageItem(CompilerContext& _compilerContext, Type const& _type):
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2015-10-14 13:19:50 +00:00
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LValue(_compilerContext, &_type)
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2015-02-25 14:14:22 +00:00
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{
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2015-10-14 13:19:50 +00:00
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if (m_dataType->isValueType())
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2015-02-25 14:14:22 +00:00
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{
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2016-10-14 10:27:46 +00:00
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if (m_dataType->category() != Type::Category::Function)
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solAssert(m_dataType->storageSize() == m_dataType->sizeOnStack(), "");
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2015-10-14 13:19:50 +00:00
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solAssert(m_dataType->storageSize() == 1, "Invalid storage size.");
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2015-02-25 14:14:22 +00:00
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}
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}
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void StorageItem::retrieveValue(SourceLocation const&, bool _remove) const
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{
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2015-03-11 17:09:35 +00:00
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// stack: storage_key storage_offset
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2015-10-14 13:19:50 +00:00
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if (!m_dataType->isValueType())
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2015-07-14 09:58:16 +00:00
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{
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2015-10-14 13:19:50 +00:00
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solAssert(m_dataType->sizeOnStack() == 1, "Invalid storage ref size.");
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2015-07-14 09:58:16 +00:00
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if (_remove)
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::POP; // remove byte offset
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2015-07-14 09:58:16 +00:00
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else
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::DUP2;
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2015-07-14 09:58:16 +00:00
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return;
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}
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2015-02-25 14:14:22 +00:00
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if (!_remove)
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2015-03-11 17:09:35 +00:00
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CompilerUtils(m_context).copyToStackTop(sizeOnStack(), sizeOnStack());
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2015-10-14 13:19:50 +00:00
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if (m_dataType->storageBytes() == 32)
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2016-04-04 11:41:35 +00:00
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m_context << Instruction::POP << Instruction::SLOAD;
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2015-03-13 18:48:24 +00:00
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else
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{
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2021-09-28 13:39:18 +00:00
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Type const* type = m_dataType;
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if (type->category() == Type::Category::UserDefinedValueType)
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type = type->encodingType();
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2016-11-09 12:34:51 +00:00
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bool cleaned = false;
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2015-03-13 18:48:24 +00:00
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m_context
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2016-04-04 11:41:35 +00:00
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<< Instruction::SWAP1 << Instruction::SLOAD << Instruction::SWAP1
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<< u256(0x100) << Instruction::EXP << Instruction::SWAP1 << Instruction::DIV;
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2021-09-28 13:39:18 +00:00
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if (type->category() == Type::Category::FixedPoint)
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2016-05-10 12:57:29 +00:00
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// implementation should be very similar to the integer case.
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2016-11-14 20:41:58 +00:00
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solUnimplemented("Not yet implemented - FixedPointType.");
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2021-09-28 13:39:18 +00:00
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else if (FunctionType const* fun = dynamic_cast<decltype(fun)>(type))
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2016-11-07 19:08:05 +00:00
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{
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2017-03-16 11:58:17 +00:00
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if (fun->kind() == FunctionType::Kind::External)
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2016-11-09 12:34:51 +00:00
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{
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2016-11-07 19:08:05 +00:00
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CompilerUtils(m_context).splitExternalFunctionType(false);
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2016-11-09 12:34:51 +00:00
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cleaned = true;
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}
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2019-05-22 21:49:42 +00:00
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else if (fun->kind() == FunctionType::Kind::Internal)
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{
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m_context << Instruction::DUP1 << Instruction::ISZERO;
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|
|
CompilerUtils(m_context).pushZeroValue(*fun);
|
|
|
|
m_context << Instruction::MUL << Instruction::OR;
|
|
|
|
}
|
2016-11-07 19:08:05 +00:00
|
|
|
}
|
2021-09-28 14:07:43 +00:00
|
|
|
else if (type->leftAligned())
|
|
|
|
{
|
|
|
|
CompilerUtils(m_context).leftShiftNumberOnStack(256 - 8 * type->storageBytes());
|
|
|
|
cleaned = true;
|
|
|
|
}
|
|
|
|
else if (
|
|
|
|
type->category() == Type::Category::Integer &&
|
|
|
|
dynamic_cast<IntegerType const&>(*type).isSigned()
|
|
|
|
)
|
|
|
|
{
|
|
|
|
m_context << u256(type->storageBytes() - 1) << Instruction::SIGNEXTEND;
|
|
|
|
cleaned = true;
|
|
|
|
}
|
|
|
|
|
2016-11-09 12:34:51 +00:00
|
|
|
if (!cleaned)
|
2016-10-14 10:27:46 +00:00
|
|
|
{
|
2021-09-28 13:39:18 +00:00
|
|
|
solAssert(type->sizeOnStack() == 1, "");
|
|
|
|
m_context << ((u256(0x1) << (8 * type->storageBytes())) - 1) << Instruction::AND;
|
2016-10-14 10:27:46 +00:00
|
|
|
}
|
2015-03-13 18:48:24 +00:00
|
|
|
}
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void StorageItem::storeValue(Type const& _sourceType, SourceLocation const& _location, bool _move) const
|
|
|
|
{
|
2015-06-30 09:54:51 +00:00
|
|
|
CompilerUtils utils(m_context);
|
2016-11-21 15:41:02 +00:00
|
|
|
solAssert(m_dataType, "");
|
|
|
|
|
2015-03-11 17:09:35 +00:00
|
|
|
// stack: value storage_key storage_offset
|
2015-10-14 13:19:50 +00:00
|
|
|
if (m_dataType->isValueType())
|
2015-02-25 14:14:22 +00:00
|
|
|
{
|
2015-10-14 13:19:50 +00:00
|
|
|
solAssert(m_dataType->storageBytes() <= 32, "Invalid storage bytes size.");
|
|
|
|
solAssert(m_dataType->storageBytes() > 0, "Invalid storage bytes size.");
|
|
|
|
if (m_dataType->storageBytes() == 32)
|
2015-03-13 18:48:24 +00:00
|
|
|
{
|
2016-10-14 10:27:46 +00:00
|
|
|
solAssert(m_dataType->sizeOnStack() == 1, "Invalid stack size.");
|
2015-03-13 18:48:24 +00:00
|
|
|
// offset should be zero
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::POP;
|
2015-03-13 18:48:24 +00:00
|
|
|
if (!_move)
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::DUP2 << Instruction::SWAP1;
|
2016-11-21 15:41:02 +00:00
|
|
|
|
|
|
|
m_context << Instruction::SWAP1;
|
2016-11-24 15:49:54 +00:00
|
|
|
utils.convertType(_sourceType, *m_dataType, true);
|
2016-11-21 15:41:02 +00:00
|
|
|
m_context << Instruction::SWAP1;
|
|
|
|
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SSTORE;
|
2015-03-13 18:48:24 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
// OR the value into the other values in the storage slot
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << u256(0x100) << Instruction::EXP;
|
2015-03-13 18:48:24 +00:00
|
|
|
// stack: value storage_ref multiplier
|
|
|
|
// fetch old value
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::DUP2 << Instruction::SLOAD;
|
2020-10-02 09:43:08 +00:00
|
|
|
// stack: value storage_ref multiplier old_full_value
|
2015-03-13 18:48:24 +00:00
|
|
|
// clear bytes in old value
|
|
|
|
m_context
|
2016-04-04 11:41:35 +00:00
|
|
|
<< Instruction::DUP2 << ((u256(1) << (8 * m_dataType->storageBytes())) - 1)
|
|
|
|
<< Instruction::MUL;
|
2016-10-14 10:27:46 +00:00
|
|
|
m_context << Instruction::NOT << Instruction::AND << Instruction::SWAP1;
|
|
|
|
// stack: value storage_ref cleared_value multiplier
|
2016-10-28 15:30:56 +00:00
|
|
|
utils.copyToStackTop(3 + m_dataType->sizeOnStack(), m_dataType->sizeOnStack());
|
2015-03-13 18:48:24 +00:00
|
|
|
// stack: value storage_ref cleared_value multiplier value
|
2021-06-02 20:49:32 +00:00
|
|
|
if (auto const* fun = dynamic_cast<FunctionType const*>(m_dataType))
|
2016-11-07 19:08:05 +00:00
|
|
|
{
|
2021-06-02 20:49:32 +00:00
|
|
|
solAssert(
|
|
|
|
_sourceType.isImplicitlyConvertibleTo(*m_dataType),
|
|
|
|
"function item stored but target is not implicitly convertible to source"
|
|
|
|
);
|
2022-08-30 09:53:02 +00:00
|
|
|
solAssert(!fun->hasBoundFirstArgument(), "");
|
2017-03-16 11:58:17 +00:00
|
|
|
if (fun->kind() == FunctionType::Kind::External)
|
2021-06-02 20:49:32 +00:00
|
|
|
{
|
|
|
|
solAssert(fun->sizeOnStack() == 2, "");
|
2016-11-07 19:08:05 +00:00
|
|
|
// Combine the two-item function type into a single stack slot.
|
|
|
|
utils.combineExternalFunctionType(false);
|
2021-06-02 20:49:32 +00:00
|
|
|
}
|
2016-11-07 19:08:05 +00:00
|
|
|
else
|
2021-06-02 20:49:32 +00:00
|
|
|
{
|
|
|
|
solAssert(fun->sizeOnStack() == 1, "");
|
2016-11-07 19:08:05 +00:00
|
|
|
m_context <<
|
|
|
|
((u256(1) << (8 * m_dataType->storageBytes())) - 1) <<
|
|
|
|
Instruction::AND;
|
2021-06-02 20:49:32 +00:00
|
|
|
}
|
2016-11-07 19:08:05 +00:00
|
|
|
}
|
2021-09-28 12:21:39 +00:00
|
|
|
else if (m_dataType->leftAligned())
|
2016-11-25 14:38:02 +00:00
|
|
|
{
|
2021-09-28 12:21:39 +00:00
|
|
|
solAssert(_sourceType.category() == Type::Category::FixedBytes || (
|
|
|
|
_sourceType.encodingType() &&
|
|
|
|
_sourceType.encodingType()->category() == Type::Category::FixedBytes
|
|
|
|
), "source not fixed bytes");
|
|
|
|
CompilerUtils(m_context).rightShiftNumberOnStack(256 - 8 * m_dataType->storageBytes());
|
2016-11-25 14:38:02 +00:00
|
|
|
}
|
2016-10-31 15:40:30 +00:00
|
|
|
else
|
2016-10-14 10:27:46 +00:00
|
|
|
{
|
|
|
|
solAssert(m_dataType->sizeOnStack() == 1, "Invalid stack size for opaque type.");
|
2015-04-16 15:43:40 +00:00
|
|
|
// remove the higher order bits
|
2016-11-25 14:38:02 +00:00
|
|
|
utils.convertType(_sourceType, *m_dataType, true, true);
|
2016-10-14 10:27:46 +00:00
|
|
|
}
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::MUL << Instruction::OR;
|
2015-03-13 18:48:24 +00:00
|
|
|
// stack: value storage_ref updated_value
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1 << Instruction::SSTORE;
|
2015-03-13 18:48:24 +00:00
|
|
|
if (_move)
|
2016-10-14 10:27:46 +00:00
|
|
|
utils.popStackElement(*m_dataType);
|
2015-03-13 18:48:24 +00:00
|
|
|
}
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2015-03-11 17:09:35 +00:00
|
|
|
solAssert(
|
2015-10-14 13:19:50 +00:00
|
|
|
_sourceType.category() == m_dataType->category(),
|
2019-05-24 08:40:15 +00:00
|
|
|
"Wrong type conversation for assignment."
|
|
|
|
);
|
2015-10-14 13:19:50 +00:00
|
|
|
if (m_dataType->category() == Type::Category::Array)
|
2015-02-25 14:14:22 +00:00
|
|
|
{
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::POP; // remove byte offset
|
2015-02-25 19:27:55 +00:00
|
|
|
ArrayUtils(m_context).copyArrayToStorage(
|
2015-10-16 08:01:22 +00:00
|
|
|
dynamic_cast<ArrayType const&>(*m_dataType),
|
|
|
|
dynamic_cast<ArrayType const&>(_sourceType)
|
|
|
|
);
|
2015-02-25 14:14:22 +00:00
|
|
|
if (_move)
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::POP;
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
2015-10-14 13:19:50 +00:00
|
|
|
else if (m_dataType->category() == Type::Category::Struct)
|
2015-02-25 14:14:22 +00:00
|
|
|
{
|
2015-07-14 09:58:16 +00:00
|
|
|
// stack layout: source_ref target_ref target_offset
|
|
|
|
// note that we have structs, so offset should be zero and are ignored
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::POP;
|
2015-10-14 13:19:50 +00:00
|
|
|
auto const& structType = dynamic_cast<StructType const&>(*m_dataType);
|
2015-06-30 09:54:51 +00:00
|
|
|
auto const& sourceType = dynamic_cast<StructType const&>(_sourceType);
|
2015-06-09 12:26:08 +00:00
|
|
|
solAssert(
|
2015-06-30 09:54:51 +00:00
|
|
|
structType.structDefinition() == sourceType.structDefinition(),
|
2015-06-09 12:26:08 +00:00
|
|
|
"Struct assignment with conversion."
|
|
|
|
);
|
2020-06-03 10:38:35 +00:00
|
|
|
solAssert(!structType.containsNestedMapping(), "");
|
2020-08-17 12:47:54 +00:00
|
|
|
if (sourceType.location() == DataLocation::CallData)
|
2015-02-25 14:14:22 +00:00
|
|
|
{
|
2020-08-17 12:47:54 +00:00
|
|
|
solAssert(sourceType.sizeOnStack() == 1, "");
|
|
|
|
solAssert(structType.sizeOnStack() == 1, "");
|
|
|
|
m_context << Instruction::DUP2 << Instruction::DUP2;
|
2020-09-01 12:43:40 +00:00
|
|
|
m_context.callYulFunction(m_context.utilFunctions().updateStorageValueFunction(sourceType, structType, 0), 2, 0);
|
2020-08-17 12:47:54 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
for (auto const& member: structType.members(nullptr))
|
2015-06-30 09:54:51 +00:00
|
|
|
{
|
2020-08-17 12:47:54 +00:00
|
|
|
// assign each member that can live outside of storage
|
2021-03-22 16:12:05 +00:00
|
|
|
Type const* memberType = member.type;
|
2020-08-17 12:47:54 +00:00
|
|
|
solAssert(memberType->nameable(), "");
|
2021-03-22 16:12:05 +00:00
|
|
|
Type const* sourceMemberType = sourceType.memberType(member.name);
|
2020-08-17 12:47:54 +00:00
|
|
|
if (sourceType.location() == DataLocation::Storage)
|
|
|
|
{
|
|
|
|
// stack layout: source_ref target_ref
|
2023-08-14 19:37:31 +00:00
|
|
|
std::pair<u256, unsigned> const& offsets = sourceType.storageOffsetsOfMember(member.name);
|
2020-08-17 12:47:54 +00:00
|
|
|
m_context << offsets.first << Instruction::DUP3 << Instruction::ADD;
|
|
|
|
m_context << u256(offsets.second);
|
|
|
|
// stack: source_ref target_ref source_member_ref source_member_off
|
|
|
|
StorageItem(m_context, *sourceMemberType).retrieveValue(_location, true);
|
|
|
|
// stack: source_ref target_ref source_value...
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
solAssert(sourceType.location() == DataLocation::Memory, "");
|
|
|
|
// stack layout: source_ref target_ref
|
|
|
|
m_context << sourceType.memoryOffsetOfMember(member.name);
|
|
|
|
m_context << Instruction::DUP3 << Instruction::ADD;
|
|
|
|
MemoryItem(m_context, *sourceMemberType).retrieveValue(_location, true);
|
|
|
|
// stack layout: source_ref target_ref source_value...
|
|
|
|
}
|
|
|
|
unsigned stackSize = sourceMemberType->sizeOnStack();
|
2023-08-14 19:37:31 +00:00
|
|
|
std::pair<u256, unsigned> const& offsets = structType.storageOffsetsOfMember(member.name);
|
2020-08-17 12:47:54 +00:00
|
|
|
m_context << dupInstruction(1 + stackSize) << offsets.first << Instruction::ADD;
|
2015-06-30 09:54:51 +00:00
|
|
|
m_context << u256(offsets.second);
|
2020-08-17 12:47:54 +00:00
|
|
|
// stack: source_ref target_ref target_off source_value... target_member_ref target_member_byte_off
|
|
|
|
StorageItem(m_context, *memberType).storeValue(*sourceMemberType, _location, true);
|
2015-06-30 09:54:51 +00:00
|
|
|
}
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
2015-07-14 09:58:16 +00:00
|
|
|
// stack layout: source_ref target_ref
|
2015-08-31 16:44:29 +00:00
|
|
|
solAssert(sourceType.sizeOnStack() == 1, "Unexpected source size.");
|
2015-02-25 14:14:22 +00:00
|
|
|
if (_move)
|
2015-07-14 09:58:16 +00:00
|
|
|
utils.popStackSlots(2);
|
|
|
|
else
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1 << Instruction::POP;
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
|
|
|
else
|
2015-03-11 17:09:35 +00:00
|
|
|
BOOST_THROW_EXCEPTION(
|
|
|
|
InternalCompilerError()
|
|
|
|
<< errinfo_sourceLocation(_location)
|
2022-03-07 04:25:35 +00:00
|
|
|
<< util::errinfo_comment("Invalid non-value type for assignment."));
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-02-25 19:27:55 +00:00
|
|
|
void StorageItem::setToZero(SourceLocation const&, bool _removeReference) const
|
2015-02-25 14:14:22 +00:00
|
|
|
{
|
2015-10-14 13:19:50 +00:00
|
|
|
if (m_dataType->category() == Type::Category::Array)
|
2015-02-25 19:27:55 +00:00
|
|
|
{
|
|
|
|
if (!_removeReference)
|
2015-03-11 17:09:35 +00:00
|
|
|
CompilerUtils(m_context).copyToStackTop(sizeOnStack(), sizeOnStack());
|
2015-10-14 13:19:50 +00:00
|
|
|
ArrayUtils(m_context).clearArray(dynamic_cast<ArrayType const&>(*m_dataType));
|
2015-02-25 19:27:55 +00:00
|
|
|
}
|
2015-10-14 13:19:50 +00:00
|
|
|
else if (m_dataType->category() == Type::Category::Struct)
|
2015-02-25 14:14:22 +00:00
|
|
|
{
|
2015-03-11 17:09:35 +00:00
|
|
|
// stack layout: storage_key storage_offset
|
2015-03-31 12:59:38 +00:00
|
|
|
// @todo this can be improved: use StorageItem for non-value types, and just store 0 in
|
|
|
|
// all slots that contain value types later.
|
2015-10-14 13:19:50 +00:00
|
|
|
auto const& structType = dynamic_cast<StructType const&>(*m_dataType);
|
2015-11-19 17:02:04 +00:00
|
|
|
for (auto const& member: structType.members(nullptr))
|
2015-02-25 14:14:22 +00:00
|
|
|
{
|
|
|
|
// zero each member that is not a mapping
|
2021-03-22 16:12:05 +00:00
|
|
|
Type const* memberType = member.type;
|
2015-08-31 16:44:29 +00:00
|
|
|
if (memberType->category() == Type::Category::Mapping)
|
2015-02-25 14:14:22 +00:00
|
|
|
continue;
|
2023-08-14 19:37:31 +00:00
|
|
|
std::pair<u256, unsigned> const& offsets = structType.storageOffsetsOfMember(member.name);
|
2015-03-11 17:09:35 +00:00
|
|
|
m_context
|
2016-04-04 11:41:35 +00:00
|
|
|
<< offsets.first << Instruction::DUP3 << Instruction::ADD
|
2015-03-13 18:48:24 +00:00
|
|
|
<< u256(offsets.second);
|
2015-02-25 19:27:55 +00:00
|
|
|
StorageItem(m_context, *memberType).setToZero();
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
2015-02-25 19:27:55 +00:00
|
|
|
if (_removeReference)
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::POP << Instruction::POP;
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2015-10-14 13:19:50 +00:00
|
|
|
solAssert(m_dataType->isValueType(), "Clearing of unsupported type requested: " + m_dataType->toString());
|
2015-03-11 17:09:35 +00:00
|
|
|
if (!_removeReference)
|
|
|
|
CompilerUtils(m_context).copyToStackTop(sizeOnStack(), sizeOnStack());
|
2015-10-14 13:19:50 +00:00
|
|
|
if (m_dataType->storageBytes() == 32)
|
2015-03-13 18:48:24 +00:00
|
|
|
{
|
|
|
|
// offset should be zero
|
|
|
|
m_context
|
2016-04-04 11:41:35 +00:00
|
|
|
<< Instruction::POP << u256(0)
|
|
|
|
<< Instruction::SWAP1 << Instruction::SSTORE;
|
2015-03-13 18:48:24 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << u256(0x100) << Instruction::EXP;
|
2015-03-13 18:48:24 +00:00
|
|
|
// stack: storage_ref multiplier
|
|
|
|
// fetch old value
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::DUP2 << Instruction::SLOAD;
|
2020-10-02 09:43:08 +00:00
|
|
|
// stack: storage_ref multiplier old_full_value
|
2015-03-13 18:48:24 +00:00
|
|
|
// clear bytes in old value
|
|
|
|
m_context
|
2016-04-04 11:41:35 +00:00
|
|
|
<< Instruction::SWAP1 << ((u256(1) << (8 * m_dataType->storageBytes())) - 1)
|
|
|
|
<< Instruction::MUL;
|
|
|
|
m_context << Instruction::NOT << Instruction::AND;
|
2015-03-13 18:48:24 +00:00
|
|
|
// stack: storage_ref cleared_value
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1 << Instruction::SSTORE;
|
2015-03-13 18:48:24 +00:00
|
|
|
}
|
2015-02-25 14:14:22 +00:00
|
|
|
}
|
|
|
|
}
|
2015-02-25 19:27:55 +00:00
|
|
|
|
2015-03-03 16:55:28 +00:00
|
|
|
StorageByteArrayElement::StorageByteArrayElement(CompilerContext& _compilerContext):
|
2019-04-17 11:40:50 +00:00
|
|
|
LValue(_compilerContext, TypeProvider::byte())
|
2015-03-03 16:55:28 +00:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
void StorageByteArrayElement::retrieveValue(SourceLocation const&, bool _remove) const
|
|
|
|
{
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: ref byte_number
|
2015-03-03 16:55:28 +00:00
|
|
|
if (_remove)
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1 << Instruction::SLOAD
|
|
|
|
<< Instruction::SWAP1 << Instruction::BYTE;
|
2015-03-03 16:55:28 +00:00
|
|
|
else
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::DUP2 << Instruction::SLOAD
|
|
|
|
<< Instruction::DUP2 << Instruction::BYTE;
|
|
|
|
m_context << (u256(1) << (256 - 8)) << Instruction::MUL;
|
2015-03-03 16:55:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void StorageByteArrayElement::storeValue(Type const&, SourceLocation const&, bool _move) const
|
|
|
|
{
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: value ref byte_number
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << u256(31) << Instruction::SUB << u256(0x100) << Instruction::EXP;
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: value ref (1<<(8*(31-byte_number)))
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::DUP2 << Instruction::SLOAD;
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: value ref (1<<(8*(31-byte_number))) old_full_value
|
2015-03-03 16:55:28 +00:00
|
|
|
// clear byte in old value
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::DUP2 << u256(0xff) << Instruction::MUL
|
|
|
|
<< Instruction::NOT << Instruction::AND;
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: value ref (1<<(32-byte_number)) old_full_value_with_cleared_byte
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1;
|
|
|
|
m_context << (u256(1) << (256 - 8)) << Instruction::DUP5 << Instruction::DIV
|
|
|
|
<< Instruction::MUL << Instruction::OR;
|
2015-03-03 16:55:28 +00:00
|
|
|
// stack: value ref new_full_value
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1 << Instruction::SSTORE;
|
2015-03-03 16:55:28 +00:00
|
|
|
if (_move)
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::POP;
|
2015-03-03 16:55:28 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void StorageByteArrayElement::setToZero(SourceLocation const&, bool _removeReference) const
|
|
|
|
{
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: ref byte_number
|
2018-10-17 20:17:33 +00:00
|
|
|
solAssert(_removeReference, "");
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << u256(31) << Instruction::SUB << u256(0x100) << Instruction::EXP;
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: ref (1<<(8*(31-byte_number)))
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::DUP2 << Instruction::SLOAD;
|
2015-03-05 14:41:39 +00:00
|
|
|
// stack: ref (1<<(8*(31-byte_number))) old_full_value
|
2015-03-03 16:55:28 +00:00
|
|
|
// clear byte in old value
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1 << u256(0xff) << Instruction::MUL;
|
|
|
|
m_context << Instruction::NOT << Instruction::AND;
|
2015-03-03 16:55:28 +00:00
|
|
|
// stack: ref old_full_value_with_cleared_byte
|
2016-04-04 11:41:35 +00:00
|
|
|
m_context << Instruction::SWAP1 << Instruction::SSTORE;
|
2015-03-03 16:55:28 +00:00
|
|
|
}
|
2015-02-25 19:27:55 +00:00
|
|
|
|
2015-10-14 13:19:50 +00:00
|
|
|
TupleObject::TupleObject(
|
|
|
|
CompilerContext& _compilerContext,
|
|
|
|
std::vector<std::unique_ptr<LValue>>&& _lvalues
|
|
|
|
):
|
2022-08-23 17:28:45 +00:00
|
|
|
LValue(_compilerContext), m_lvalues(std::move(_lvalues))
|
2015-10-14 13:19:50 +00:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned TupleObject::sizeOnStack() const
|
|
|
|
{
|
|
|
|
unsigned size = 0;
|
|
|
|
for (auto const& lv: m_lvalues)
|
|
|
|
if (lv)
|
|
|
|
size += lv->sizeOnStack();
|
|
|
|
return size;
|
|
|
|
}
|
|
|
|
|
2018-10-17 20:17:33 +00:00
|
|
|
void TupleObject::retrieveValue(SourceLocation const&, bool) const
|
2015-10-14 13:19:50 +00:00
|
|
|
{
|
2018-10-17 20:17:33 +00:00
|
|
|
solAssert(false, "Tried to retrieve value of tuple.");
|
2015-10-14 13:19:50 +00:00
|
|
|
}
|
|
|
|
|
2015-10-15 12:03:56 +00:00
|
|
|
void TupleObject::storeValue(Type const& _sourceType, SourceLocation const& _location, bool) const
|
2015-10-14 13:19:50 +00:00
|
|
|
{
|
|
|
|
// values are below the lvalue references
|
|
|
|
unsigned valuePos = sizeOnStack();
|
|
|
|
TypePointers const& valueTypes = dynamic_cast<TupleType const&>(_sourceType).components();
|
2015-10-14 22:42:36 +00:00
|
|
|
solAssert(valueTypes.size() == m_lvalues.size(), "");
|
2015-10-14 13:19:50 +00:00
|
|
|
// valuePos .... refPos ...
|
|
|
|
// We will assign from right to left to optimize stack layout.
|
|
|
|
for (size_t i = 0; i < m_lvalues.size(); ++i)
|
|
|
|
{
|
2023-08-14 19:37:31 +00:00
|
|
|
std::unique_ptr<LValue> const& lvalue = m_lvalues[m_lvalues.size() - i - 1];
|
2021-03-22 16:12:05 +00:00
|
|
|
Type const* valType = valueTypes[valueTypes.size() - i - 1];
|
2015-10-14 13:19:50 +00:00
|
|
|
unsigned stackHeight = m_context.stackHeight();
|
2015-10-14 22:42:36 +00:00
|
|
|
solAssert(!valType == !lvalue, "");
|
|
|
|
if (!lvalue)
|
|
|
|
continue;
|
2015-10-14 13:19:50 +00:00
|
|
|
valuePos += valType->sizeOnStack();
|
2015-10-14 22:42:36 +00:00
|
|
|
// copy value to top
|
|
|
|
CompilerUtils(m_context).copyToStackTop(valuePos, valType->sizeOnStack());
|
|
|
|
// move lvalue ref above value
|
|
|
|
CompilerUtils(m_context).moveToStackTop(valType->sizeOnStack(), lvalue->sizeOnStack());
|
|
|
|
lvalue->storeValue(*valType, _location, true);
|
2015-10-14 13:19:50 +00:00
|
|
|
valuePos += m_context.stackHeight() - stackHeight;
|
|
|
|
}
|
|
|
|
// As the type of an assignment to a tuple type is the empty tuple, we always move.
|
|
|
|
CompilerUtils(m_context).popStackElement(_sourceType);
|
|
|
|
}
|
|
|
|
|
2018-10-17 20:17:33 +00:00
|
|
|
void TupleObject::setToZero(SourceLocation const&, bool) const
|
2015-10-14 13:19:50 +00:00
|
|
|
{
|
2018-10-17 20:17:33 +00:00
|
|
|
solAssert(false, "Tried to delete tuple.");
|
2015-10-14 13:19:50 +00:00
|
|
|
}
|