solidity/libsolidity/formal/SymbolicVariables.cpp
Djordje Mijovic c6e4943089 Adding fixes for signedness warnings in libsolidity
Co-authored-by: Kamil Śliwak <kamil.sliwak@codepoets.it>
2020-06-10 10:41:55 +02:00

321 lines
7.8 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/>.
*/
#include <libsolidity/formal/SymbolicVariables.h>
#include <libsolidity/formal/SymbolicTypes.h>
#include <libsolidity/ast/AST.h>
using namespace std;
using namespace solidity;
using namespace solidity::smtutil;
using namespace solidity::frontend;
using namespace solidity::frontend::smt;
SymbolicVariable::SymbolicVariable(
TypePointer _type,
TypePointer _originalType,
string _uniqueName,
EncodingContext& _context
):
m_type(_type),
m_originalType(_originalType),
m_uniqueName(move(_uniqueName)),
m_context(_context),
m_ssa(make_unique<SSAVariable>())
{
solAssert(m_type, "");
m_sort = smtSort(*m_type);
solAssert(m_sort, "");
}
SymbolicVariable::SymbolicVariable(
SortPointer _sort,
string _uniqueName,
EncodingContext& _context
):
m_sort(move(_sort)),
m_uniqueName(move(_uniqueName)),
m_context(_context),
m_ssa(make_unique<SSAVariable>())
{
solAssert(m_sort, "");
}
smtutil::Expression SymbolicVariable::currentValue(frontend::TypePointer const&) const
{
return valueAtIndex(m_ssa->index());
}
string SymbolicVariable::currentName() const
{
return uniqueSymbol(m_ssa->index());
}
smtutil::Expression SymbolicVariable::valueAtIndex(unsigned _index) const
{
return m_context.newVariable(uniqueSymbol(_index), m_sort);
}
string SymbolicVariable::nameAtIndex(unsigned _index) const
{
return uniqueSymbol(_index);
}
string SymbolicVariable::uniqueSymbol(unsigned _index) const
{
return m_uniqueName + "_" + to_string(_index);
}
smtutil::Expression SymbolicVariable::resetIndex()
{
m_ssa->resetIndex();
return currentValue();
}
smtutil::Expression SymbolicVariable::setIndex(unsigned _index)
{
m_ssa->setIndex(_index);
return currentValue();
}
smtutil::Expression SymbolicVariable::increaseIndex()
{
++(*m_ssa);
return currentValue();
}
SymbolicBoolVariable::SymbolicBoolVariable(
frontend::TypePointer _type,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _type, move(_uniqueName), _context)
{
solAssert(m_type->category() == frontend::Type::Category::Bool, "");
}
SymbolicIntVariable::SymbolicIntVariable(
frontend::TypePointer _type,
frontend::TypePointer _originalType,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _originalType, move(_uniqueName), _context)
{
solAssert(isNumber(m_type->category()), "");
}
SymbolicAddressVariable::SymbolicAddressVariable(
string _uniqueName,
EncodingContext& _context
):
SymbolicIntVariable(TypeProvider::uint(160), TypeProvider::uint(160), move(_uniqueName), _context)
{
}
SymbolicFixedBytesVariable::SymbolicFixedBytesVariable(
frontend::TypePointer _originalType,
unsigned _numBytes,
string _uniqueName,
EncodingContext& _context
):
SymbolicIntVariable(TypeProvider::uint(_numBytes * 8), _originalType, move(_uniqueName), _context)
{
}
SymbolicFunctionVariable::SymbolicFunctionVariable(
frontend::TypePointer _type,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _type, move(_uniqueName), _context),
m_declaration(m_context.newVariable(currentName(), m_sort))
{
solAssert(m_type->category() == frontend::Type::Category::Function, "");
}
SymbolicFunctionVariable::SymbolicFunctionVariable(
SortPointer _sort,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(move(_sort), move(_uniqueName), _context),
m_declaration(m_context.newVariable(currentName(), m_sort))
{
solAssert(m_sort->kind == Kind::Function, "");
}
smtutil::Expression SymbolicFunctionVariable::currentValue(frontend::TypePointer const& _targetType) const
{
return m_abstract.currentValue(_targetType);
}
smtutil::Expression SymbolicFunctionVariable::currentFunctionValue() const
{
return m_declaration;
}
smtutil::Expression SymbolicFunctionVariable::valueAtIndex(unsigned _index) const
{
return m_abstract.valueAtIndex(_index);
}
smtutil::Expression SymbolicFunctionVariable::functionValueAtIndex(unsigned _index) const
{
return SymbolicVariable::valueAtIndex(_index);
}
smtutil::Expression SymbolicFunctionVariable::resetIndex()
{
SymbolicVariable::resetIndex();
return m_abstract.resetIndex();
}
smtutil::Expression SymbolicFunctionVariable::setIndex(unsigned _index)
{
SymbolicVariable::setIndex(_index);
return m_abstract.setIndex(_index);
}
smtutil::Expression SymbolicFunctionVariable::increaseIndex()
{
++(*m_ssa);
resetDeclaration();
m_abstract.increaseIndex();
return m_abstract.currentValue();
}
smtutil::Expression SymbolicFunctionVariable::operator()(vector<smtutil::Expression> _arguments) const
{
return m_declaration(_arguments);
}
void SymbolicFunctionVariable::resetDeclaration()
{
m_declaration = m_context.newVariable(currentName(), m_sort);
}
SymbolicEnumVariable::SymbolicEnumVariable(
frontend::TypePointer _type,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _type, move(_uniqueName), _context)
{
solAssert(isEnum(m_type->category()), "");
}
SymbolicTupleVariable::SymbolicTupleVariable(
frontend::TypePointer _type,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _type, move(_uniqueName), _context)
{
solAssert(isTuple(m_type->category()), "");
}
SymbolicTupleVariable::SymbolicTupleVariable(
SortPointer _sort,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(move(_sort), move(_uniqueName), _context)
{
solAssert(m_sort->kind == Kind::Tuple, "");
}
vector<SortPointer> const& SymbolicTupleVariable::components()
{
auto tupleSort = dynamic_pointer_cast<TupleSort>(m_sort);
solAssert(tupleSort, "");
return tupleSort->components;
}
smtutil::Expression SymbolicTupleVariable::component(
size_t _index,
TypePointer _fromType,
TypePointer _toType
)
{
optional<smtutil::Expression> conversion = symbolicTypeConversion(_fromType, _toType);
if (conversion)
return *conversion;
return smtutil::Expression::tuple_get(currentValue(), _index);
}
SymbolicArrayVariable::SymbolicArrayVariable(
frontend::TypePointer _type,
frontend::TypePointer _originalType,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(_type, _originalType, move(_uniqueName), _context),
m_pair(
smtSort(*_type),
m_uniqueName + "_length_pair",
m_context
)
{
solAssert(isArray(m_type->category()) || isMapping(m_type->category()), "");
}
SymbolicArrayVariable::SymbolicArrayVariable(
SortPointer _sort,
string _uniqueName,
EncodingContext& _context
):
SymbolicVariable(move(_sort), move(_uniqueName), _context),
m_pair(
std::make_shared<TupleSort>(
"array_length_pair",
std::vector<std::string>{"array", "length"},
std::vector<SortPointer>{m_sort, SortProvider::uintSort}
),
m_uniqueName + "_array_length_pair",
m_context
)
{
solAssert(m_sort->kind == Kind::Array, "");
}
smtutil::Expression SymbolicArrayVariable::currentValue(frontend::TypePointer const& _targetType) const
{
optional<smtutil::Expression> conversion = symbolicTypeConversion(m_originalType, _targetType);
if (conversion)
return *conversion;
return m_pair.currentValue();
}
smtutil::Expression SymbolicArrayVariable::valueAtIndex(unsigned _index) const
{
return m_pair.valueAtIndex(_index);
}
smtutil::Expression SymbolicArrayVariable::elements()
{
return m_pair.component(0);
}
smtutil::Expression SymbolicArrayVariable::length()
{
return m_pair.component(1);
}