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Verification; assume non-const pointer argument might point at uninitialized data

This commit is contained in:
Daniel Marjamäki 2019-12-31 17:51:58 +01:00
parent 10010eba95
commit 446256a503
2 changed files with 7 additions and 3 deletions
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5
lib/exprengine.cpp
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@ -1649,9 +1649,12 @@ static ExprEngine::ValuePtr createVariableValue(const Variable &var, Data &data)
else { else {
ValueType vt(*valueType); ValueType vt(*valueType);
vt.pointer = 0; vt.pointer = 0;
if (vt.constness & 1)
pointerValue = getValueRangeFromValueType(data.getNewSymbolName(), &vt, *data.settings); pointerValue = getValueRangeFromValueType(data.getNewSymbolName(), &vt, *data.settings);
else
pointerValue = std::make_shared<ExprEngine::UninitValue>();
} }
return std::make_shared<ExprEngine::ArrayValue>(data.getNewSymbolName(), bufferSize, pointerValue, true, true, true); return std::make_shared<ExprEngine::ArrayValue>(data.getNewSymbolName(), bufferSize, pointerValue, true, true, var.isLocal() && !var.isStatic());
} }
if (var.isArray()) if (var.isArray())
return std::make_shared<ExprEngine::ArrayValue>(&data, &var); return std::make_shared<ExprEngine::ArrayValue>(&data, &var);

3
test/verify/juliet.py
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@ -61,7 +61,8 @@ def check(tc:str, warning_id:str):
final_report = '' final_report = ''
final_report += check('C/testcases/CWE369_Divide_by_Zero/s*/*.c', 'verificationDivByZero') #final_report += check('C/testcases/CWE369_Divide_by_Zero/s*/*.c', 'verificationDivByZero')
final_report += check('C/testcases/CWE457_Use_of_Uninitialized_Variable/s*/*.c', 'verificationUninit')
print(final_report) print(final_report)