cerc-io/solidity
11
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

[SMTChecker] Support addmod and mulmod.

Browse Source
This commit is contained in:
Leonardo Alt
2020-09-29 12:45:19 +02:00
parent 7540ae4b3a
commit 352cce5fc8
13 changed files with 181 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
libsolidity/formal/SMTEncoder.cpp
+20
View File
@@ -632,8 +632,10 @@ void SMTEncoder::endVisit(FunctionCall const& _funCall)
case FunctionType::Kind::SHA256:
case FunctionType::Kind::RIPEMD160:
case FunctionType::Kind::BlockHash:
break;
case FunctionType::Kind::AddMod:
case FunctionType::Kind::MulMod:
visitAddMulMod(_funCall);
break;
case FunctionType::Kind::Send:
case FunctionType::Kind::Transfer:
@@ -738,6 +740,24 @@ void SMTEncoder::visitGasLeft(FunctionCall const& _funCall)
m_context.addAssertion(symbolicVar->currentValue() <= symbolicVar->valueAtIndex(index - 1));
}
void SMTEncoder::visitAddMulMod(FunctionCall const& _funCall)
{
auto const& funType = dynamic_cast<FunctionType const&>(*_funCall.expression().annotation().type);
auto kind = funType.kind();
solAssert(kind == FunctionType::Kind::AddMod || kind == FunctionType::Kind::MulMod, "");
auto const& args = _funCall.arguments();
solAssert(args.at(0) && args.at(1) && args.at(2), "");
auto x = expr(*args.at(0));
auto y = expr(*args.at(1));
auto k = expr(*args.at(2));
m_context.addAssertion(k != 0);
if (kind == FunctionType::Kind::AddMod)
defineExpr(_funCall, (x + y) % k);
else
defineExpr(_funCall, (x * y) % k);
}
void SMTEncoder::visitObjectCreation(FunctionCall const& _funCall)
{
auto const& args = _funCall.arguments();