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Merge remote-tracking branch 'origin/develop' into breaking

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This commit is contained in:
chriseth
2020-12-01 10:50:13 +01:00
parent 656cb810a4 388fcddd23
commit 6de7eaba95
81 changed files with 1740 additions and 775 deletions
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libsolidity/formal/SMTEncoder.cpp
+26 -27
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@@ -155,8 +155,10 @@ void SMTEncoder::visitFunctionOrModifier()
if (m_modifierDepthStack.back() == static_cast<int>(function.modifiers().size()))
{
pushPathCondition(currentPathConditions());
if (function.isImplemented())
function.body().accept(*this);
popPathCondition();
}
else
{
@@ -193,6 +195,7 @@ void SMTEncoder::inlineModifierInvocation(ModifierInvocation const* _invocation,
initializeFunctionCallParameters(*_definition, args);
pushCallStack({_definition, _invocation});
pushPathCondition(currentPathConditions());
if (auto modifier = dynamic_cast<ModifierDefinition const*>(_definition))
{
if (modifier->isImplemented())
@@ -205,6 +208,7 @@ void SMTEncoder::inlineModifierInvocation(ModifierInvocation const* _invocation,
function->accept(*this);
// Functions are popped from the callstack in endVisit(FunctionDefinition)
}
popPathCondition();
}
void SMTEncoder::inlineConstructorHierarchy(ContractDefinition const& _contract)
@@ -288,26 +292,6 @@ bool SMTEncoder::visit(TryCatchClause const& _clause)
return false;
}
bool SMTEncoder::visit(IfStatement const& _node)
{
_node.condition().accept(*this);
auto indicesEndTrue = visitBranch(&_node.trueStatement(), expr(_node.condition()));
auto touchedVars = touchedVariables(_node.trueStatement());
decltype(indicesEndTrue) indicesEndFalse;
if (_node.falseStatement())
{
indicesEndFalse = visitBranch(_node.falseStatement(), !expr(_node.condition()));
touchedVars += touchedVariables(*_node.falseStatement());
}
else
indicesEndFalse = copyVariableIndices();
mergeVariables(touchedVars, expr(_node.condition()), indicesEndTrue, indicesEndFalse);
return false;
}
void SMTEncoder::endVisit(VariableDeclarationStatement const& _varDecl)
{
if (_varDecl.declarations().size() != 1)
@@ -598,10 +582,10 @@ bool SMTEncoder::visit(Conditional const& _op)
{
_op.condition().accept(*this);
auto indicesEndTrue = visitBranch(&_op.trueExpression(), expr(_op.condition()));
auto indicesEndTrue = visitBranch(&_op.trueExpression(), expr(_op.condition())).first;
auto touchedVars = touchedVariables(_op.trueExpression());
auto indicesEndFalse = visitBranch(&_op.falseExpression(), !expr(_op.condition()));
auto indicesEndFalse = visitBranch(&_op.falseExpression(), !expr(_op.condition())).first;
touchedVars += touchedVariables(_op.falseExpression());
mergeVariables(touchedVars, expr(_op.condition()), indicesEndTrue, indicesEndFalse);
@@ -1749,13 +1733,13 @@ void SMTEncoder::booleanOperation(BinaryOperation const& _op)
_op.leftExpression().accept(*this);
if (_op.getOperator() == Token::And)
{
auto indicesAfterSecond = visitBranch(&_op.rightExpression(), expr(_op.leftExpression()));
auto indicesAfterSecond = visitBranch(&_op.rightExpression(), expr(_op.leftExpression())).first;
mergeVariables(touchedVariables(_op.rightExpression()), !expr(_op.leftExpression()), copyVariableIndices(), indicesAfterSecond);
defineExpr(_op, expr(_op.leftExpression()) && expr(_op.rightExpression()));
}
else
{
auto indicesAfterSecond = visitBranch(&_op.rightExpression(), !expr(_op.leftExpression()));
auto indicesAfterSecond = visitBranch(&_op.rightExpression(), !expr(_op.leftExpression())).first;
mergeVariables(touchedVariables(_op.rightExpression()), expr(_op.leftExpression()), copyVariableIndices(), indicesAfterSecond);
defineExpr(_op, expr(_op.leftExpression()) || expr(_op.rightExpression()));
}
@@ -1969,22 +1953,29 @@ void SMTEncoder::assignment(smt::SymbolicVariable& _symVar, smtutil::Expression
m_context.addAssertion(_symVar.increaseIndex() == _value);
}
SMTEncoder::VariableIndices SMTEncoder::visitBranch(ASTNode const* _statement, smtutil::Expression _condition)
pair<SMTEncoder::VariableIndices, smtutil::Expression> SMTEncoder::visitBranch(
ASTNode const* _statement,
smtutil::Expression _condition
)
{
return visitBranch(_statement, &_condition);
}
SMTEncoder::VariableIndices SMTEncoder::visitBranch(ASTNode const* _statement, smtutil::Expression const* _condition)
pair<SMTEncoder::VariableIndices, smtutil::Expression> SMTEncoder::visitBranch(
ASTNode const* _statement,
smtutil::Expression const* _condition
)
{
auto indicesBeforeBranch = copyVariableIndices();
if (_condition)
pushPathCondition(*_condition);
_statement->accept(*this);
auto pathConditionOnExit = currentPathConditions();
if (_condition)
popPathCondition();
auto indicesAfterBranch = copyVariableIndices();
resetVariableIndices(indicesBeforeBranch);
return indicesAfterBranch;
return {indicesAfterBranch, pathConditionOnExit};
}
void SMTEncoder::initializeFunctionCallParameters(CallableDeclaration const& _function, vector<smtutil::Expression> const& _callArgs)
@@ -2240,6 +2231,14 @@ void SMTEncoder::pushPathCondition(smtutil::Expression const& _e)
m_pathConditions.push_back(currentPathConditions() && _e);
}
void SMTEncoder::setPathCondition(smtutil::Expression const& _e)
{
if (m_pathConditions.empty())
m_pathConditions.push_back(_e);
else
m_pathConditions.back() = _e;
}
smtutil::Expression SMTEncoder::currentPathConditions()
{
if (m_pathConditions.empty())