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Merge pull request #7208 from ethereum/smt_recursive_functions_return_vars

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[SMTChecker] Set unknown for return vars of recursive functions
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Leonardo 2019-08-09 18:08:40 +02:00 committed by GitHub
commit dcfa70b1a8
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1 changed files with 12 additions and 2 deletions
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14
libsolidity/formal/BMC.cpp
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@ -393,12 +393,22 @@ void BMC::inlineFunctionCall(FunctionCall const& _funCall)
solAssert(shouldInlineFunctionCall(_funCall), "");
FunctionDefinition const* funDef = functionCallToDefinition(_funCall);
solAssert(funDef, "");
if (visitedFunction(funDef))
{
auto const& returnParams = funDef->returnParameters();
for (auto param: returnParams)
{
m_context.newValue(*param);
m_context.setUnknownValue(*param);
}
m_errorReporter.warning(
_funCall.location(),
"Assertion checker does not support recursive function calls.",
SecondarySourceLocation().append("Starting from function:", funDef->location())
);
}
else
{
vector<smt::Expression> funArgs;
@ -425,9 +435,9 @@ void BMC::inlineFunctionCall(FunctionCall const& _funCall)
if (m_callStack.empty())
initFunction(*funDef);
funDef->accept(*this);
createReturnedExpressions(_funCall);
}
createReturnedExpressions(_funCall);
}
void BMC::abstractFunctionCall(FunctionCall const& _funCall)