mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
330 lines
11 KiB
C++
330 lines
11 KiB
C++
/*
|
|
This file is part of solidity.
|
|
|
|
solidity 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.
|
|
|
|
solidity 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 solidity. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/**
|
|
* Yul dialects for EVM.
|
|
*/
|
|
|
|
#include <libyul/backends/evm/EVMDialect.h>
|
|
|
|
#include <libyul/AsmAnalysisInfo.h>
|
|
#include <libyul/AsmData.h>
|
|
#include <libyul/Object.h>
|
|
#include <libyul/Exceptions.h>
|
|
#include <libyul/AsmParser.h>
|
|
#include <libyul/backends/evm/AbstractAssembly.h>
|
|
|
|
#include <libevmasm/SemanticInformation.h>
|
|
#include <libevmasm/Instruction.h>
|
|
|
|
#include <liblangutil/Exceptions.h>
|
|
|
|
#include <boost/range/adaptor/reversed.hpp>
|
|
|
|
using namespace std;
|
|
using namespace solidity;
|
|
using namespace solidity::yul;
|
|
using namespace solidity::util;
|
|
|
|
namespace
|
|
{
|
|
pair<YulString, BuiltinFunctionForEVM> createEVMFunction(
|
|
string const& _name,
|
|
evmasm::Instruction _instruction
|
|
)
|
|
{
|
|
evmasm::InstructionInfo info = evmasm::instructionInfo(_instruction);
|
|
BuiltinFunctionForEVM f;
|
|
f.name = YulString{_name};
|
|
f.parameters.resize(info.args);
|
|
f.returns.resize(info.ret);
|
|
f.sideEffects = EVMDialect::sideEffectsOfInstruction(_instruction);
|
|
f.controlFlowSideEffects.terminates = evmasm::SemanticInformation::terminatesControlFlow(_instruction);
|
|
f.controlFlowSideEffects.reverts = evmasm::SemanticInformation::reverts(_instruction);
|
|
f.isMSize = _instruction == evmasm::Instruction::MSIZE;
|
|
f.literalArguments.reset();
|
|
f.instruction = _instruction;
|
|
f.generateCode = [_instruction](
|
|
FunctionCall const&,
|
|
AbstractAssembly& _assembly,
|
|
BuiltinContext&,
|
|
std::function<void()> _visitArguments
|
|
) {
|
|
_visitArguments();
|
|
_assembly.appendInstruction(_instruction);
|
|
};
|
|
|
|
return {f.name, move(f)};
|
|
}
|
|
|
|
pair<YulString, BuiltinFunctionForEVM> createFunction(
|
|
string _name,
|
|
size_t _params,
|
|
size_t _returns,
|
|
SideEffects _sideEffects,
|
|
vector<bool> _literalArguments,
|
|
std::function<void(FunctionCall const&, AbstractAssembly&, BuiltinContext&, std::function<void()>)> _generateCode
|
|
)
|
|
{
|
|
solAssert(_literalArguments.size() == _params || _literalArguments.empty(), "");
|
|
|
|
YulString name{std::move(_name)};
|
|
BuiltinFunctionForEVM f;
|
|
f.name = name;
|
|
f.parameters.resize(_params);
|
|
f.returns.resize(_returns);
|
|
f.sideEffects = std::move(_sideEffects);
|
|
if (!_literalArguments.empty())
|
|
f.literalArguments = std::move(_literalArguments);
|
|
else
|
|
f.literalArguments.reset();
|
|
f.isMSize = false;
|
|
f.instruction = {};
|
|
f.generateCode = std::move(_generateCode);
|
|
return {name, f};
|
|
}
|
|
|
|
map<YulString, BuiltinFunctionForEVM> createBuiltins(langutil::EVMVersion _evmVersion, bool _objectAccess)
|
|
{
|
|
map<YulString, BuiltinFunctionForEVM> builtins;
|
|
for (auto const& instr: Parser::instructions())
|
|
if (
|
|
!evmasm::isDupInstruction(instr.second) &&
|
|
!evmasm::isSwapInstruction(instr.second) &&
|
|
instr.second != evmasm::Instruction::JUMP &&
|
|
instr.second != evmasm::Instruction::JUMPI &&
|
|
_evmVersion.hasOpcode(instr.second)
|
|
)
|
|
builtins.emplace(createEVMFunction(instr.first, instr.second));
|
|
|
|
if (_objectAccess)
|
|
{
|
|
builtins.emplace(createFunction("datasize", 1, 1, SideEffects{}, {true}, [](
|
|
FunctionCall const& _call,
|
|
AbstractAssembly& _assembly,
|
|
BuiltinContext& _context,
|
|
function<void()>
|
|
) {
|
|
yulAssert(_context.currentObject, "No object available.");
|
|
yulAssert(_call.arguments.size() == 1, "");
|
|
Expression const& arg = _call.arguments.front();
|
|
YulString dataName = std::get<Literal>(arg).value;
|
|
if (_context.currentObject->name == dataName)
|
|
_assembly.appendAssemblySize();
|
|
else
|
|
{
|
|
yulAssert(
|
|
_context.subIDs.count(dataName) != 0,
|
|
"Could not find assembly object <" + dataName.str() + ">."
|
|
);
|
|
_assembly.appendDataSize(_context.subIDs.at(dataName));
|
|
}
|
|
}));
|
|
builtins.emplace(createFunction("dataoffset", 1, 1, SideEffects{}, {true}, [](
|
|
FunctionCall const& _call,
|
|
AbstractAssembly& _assembly,
|
|
BuiltinContext& _context,
|
|
std::function<void()>
|
|
) {
|
|
yulAssert(_context.currentObject, "No object available.");
|
|
yulAssert(_call.arguments.size() == 1, "");
|
|
Expression const& arg = _call.arguments.front();
|
|
YulString dataName = std::get<Literal>(arg).value;
|
|
if (_context.currentObject->name == dataName)
|
|
_assembly.appendConstant(0);
|
|
else
|
|
{
|
|
yulAssert(
|
|
_context.subIDs.count(dataName) != 0,
|
|
"Could not find assembly object <" + dataName.str() + ">."
|
|
);
|
|
_assembly.appendDataOffset(_context.subIDs.at(dataName));
|
|
}
|
|
}));
|
|
builtins.emplace(createFunction(
|
|
"datacopy",
|
|
3,
|
|
0,
|
|
SideEffects{false, false, false, false, true},
|
|
{},
|
|
[](
|
|
FunctionCall const&,
|
|
AbstractAssembly& _assembly,
|
|
BuiltinContext&,
|
|
std::function<void()> _visitArguments
|
|
) {
|
|
_visitArguments();
|
|
_assembly.appendInstruction(evmasm::Instruction::CODECOPY);
|
|
}
|
|
));
|
|
}
|
|
return builtins;
|
|
}
|
|
|
|
}
|
|
|
|
EVMDialect::EVMDialect(langutil::EVMVersion _evmVersion, bool _objectAccess):
|
|
m_objectAccess(_objectAccess),
|
|
m_evmVersion(_evmVersion),
|
|
m_functions(createBuiltins(_evmVersion, _objectAccess))
|
|
{
|
|
}
|
|
|
|
BuiltinFunctionForEVM const* EVMDialect::builtin(YulString _name) const
|
|
{
|
|
auto it = m_functions.find(_name);
|
|
if (it != m_functions.end())
|
|
return &it->second;
|
|
else
|
|
return nullptr;
|
|
}
|
|
|
|
EVMDialect const& EVMDialect::strictAssemblyForEVM(langutil::EVMVersion _version)
|
|
{
|
|
static map<langutil::EVMVersion, unique_ptr<EVMDialect const>> dialects;
|
|
static YulStringRepository::ResetCallback callback{[&] { dialects.clear(); }};
|
|
if (!dialects[_version])
|
|
dialects[_version] = make_unique<EVMDialect>(_version, false);
|
|
return *dialects[_version];
|
|
}
|
|
|
|
EVMDialect const& EVMDialect::strictAssemblyForEVMObjects(langutil::EVMVersion _version)
|
|
{
|
|
static map<langutil::EVMVersion, unique_ptr<EVMDialect const>> dialects;
|
|
static YulStringRepository::ResetCallback callback{[&] { dialects.clear(); }};
|
|
if (!dialects[_version])
|
|
dialects[_version] = make_unique<EVMDialect>(_version, true);
|
|
return *dialects[_version];
|
|
}
|
|
|
|
SideEffects EVMDialect::sideEffectsOfInstruction(evmasm::Instruction _instruction)
|
|
{
|
|
return SideEffects{
|
|
evmasm::SemanticInformation::movable(_instruction),
|
|
evmasm::SemanticInformation::sideEffectFree(_instruction),
|
|
evmasm::SemanticInformation::sideEffectFreeIfNoMSize(_instruction),
|
|
evmasm::SemanticInformation::invalidatesStorage(_instruction),
|
|
evmasm::SemanticInformation::invalidatesMemory(_instruction)
|
|
};
|
|
}
|
|
|
|
EVMDialectTyped::EVMDialectTyped(langutil::EVMVersion _evmVersion, bool _objectAccess):
|
|
EVMDialect(_evmVersion, _objectAccess)
|
|
{
|
|
defaultType = "u256"_yulstring;
|
|
boolType = "bool"_yulstring;
|
|
types = {defaultType, boolType};
|
|
|
|
// Set all types to ``defaultType``
|
|
for (auto& fun: m_functions)
|
|
{
|
|
for (auto& p: fun.second.parameters)
|
|
p = defaultType;
|
|
for (auto& r: fun.second.returns)
|
|
r = defaultType;
|
|
}
|
|
|
|
m_functions["lt"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["gt"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["slt"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["sgt"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["eq"_yulstring].returns = {"bool"_yulstring};
|
|
|
|
// "not" and "bitnot" replace "iszero" and "not"
|
|
m_functions["bitnot"_yulstring] = m_functions["not"_yulstring];
|
|
m_functions["bitnot"_yulstring].name = "bitnot"_yulstring;
|
|
m_functions["not"_yulstring] = m_functions["iszero"_yulstring];
|
|
m_functions["not"_yulstring].name = "not"_yulstring;
|
|
m_functions["not"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["not"_yulstring].parameters = {"bool"_yulstring};
|
|
m_functions.erase("iszero"_yulstring);
|
|
|
|
m_functions["bitand"_yulstring] = m_functions["and"_yulstring];
|
|
m_functions["bitand"_yulstring].name = "bitand"_yulstring;
|
|
m_functions["bitor"_yulstring] = m_functions["or"_yulstring];
|
|
m_functions["bitor"_yulstring].name = "bitor"_yulstring;
|
|
m_functions["bitxor"_yulstring] = m_functions["xor"_yulstring];
|
|
m_functions["bitxor"_yulstring].name = "bitxor"_yulstring;
|
|
m_functions["and"_yulstring].parameters = {"bool"_yulstring, "bool"_yulstring};
|
|
m_functions["and"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["or"_yulstring].parameters = {"bool"_yulstring, "bool"_yulstring};
|
|
m_functions["or"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["xor"_yulstring].parameters = {"bool"_yulstring, "bool"_yulstring};
|
|
m_functions["xor"_yulstring].returns = {"bool"_yulstring};
|
|
m_functions["popbool"_yulstring] = m_functions["pop"_yulstring];
|
|
m_functions["popbool"_yulstring].name = "popbool"_yulstring;
|
|
m_functions["popbool"_yulstring].parameters = {"bool"_yulstring};
|
|
m_functions.insert(createFunction("bool_to_u256", 1, 1, {}, {}, [](
|
|
FunctionCall const&,
|
|
AbstractAssembly&,
|
|
BuiltinContext&,
|
|
std::function<void()> _visitArguments
|
|
) {
|
|
_visitArguments();
|
|
}));
|
|
m_functions["bool_to_u256"_yulstring].parameters = {"bool"_yulstring};
|
|
m_functions["bool_to_u256"_yulstring].returns = {"u256"_yulstring};
|
|
m_functions.insert(createFunction("u256_to_bool", 1, 1, {}, {}, [](
|
|
FunctionCall const&,
|
|
AbstractAssembly& _assembly,
|
|
BuiltinContext&,
|
|
std::function<void()> _visitArguments
|
|
) {
|
|
// A value larger than 1 causes an invalid instruction.
|
|
_visitArguments();
|
|
_assembly.appendConstant(2);
|
|
_assembly.appendInstruction(evmasm::Instruction::DUP2);
|
|
_assembly.appendInstruction(evmasm::Instruction::LT);
|
|
AbstractAssembly::LabelID inRange = _assembly.newLabelId();
|
|
_assembly.appendJumpToIf(inRange);
|
|
_assembly.appendInstruction(evmasm::Instruction::INVALID);
|
|
_assembly.appendLabel(inRange);
|
|
}));
|
|
m_functions["u256_to_bool"_yulstring].parameters = {"u256"_yulstring};
|
|
m_functions["u256_to_bool"_yulstring].returns = {"bool"_yulstring};
|
|
}
|
|
|
|
BuiltinFunctionForEVM const* EVMDialectTyped::discardFunction(YulString _type) const
|
|
{
|
|
if (_type == "bool"_yulstring)
|
|
return builtin("popbool"_yulstring);
|
|
else
|
|
{
|
|
yulAssert(_type == defaultType, "");
|
|
return builtin("pop"_yulstring);
|
|
}
|
|
}
|
|
|
|
BuiltinFunctionForEVM const* EVMDialectTyped::equalityFunction(YulString _type) const
|
|
{
|
|
if (_type == "bool"_yulstring)
|
|
return nullptr;
|
|
else
|
|
{
|
|
yulAssert(_type == defaultType, "");
|
|
return builtin("eq"_yulstring);
|
|
}
|
|
}
|
|
|
|
EVMDialectTyped const& EVMDialectTyped::instance(langutil::EVMVersion _version)
|
|
{
|
|
static map<langutil::EVMVersion, unique_ptr<EVMDialectTyped const>> dialects;
|
|
static YulStringRepository::ResetCallback callback{[&] { dialects.clear(); }};
|
|
if (!dialects[_version])
|
|
dialects[_version] = make_unique<EVMDialectTyped>(_version, true);
|
|
return *dialects[_version];
|
|
}
|