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V3524. AUTOSAR. The value of uninitiali…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
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Contents

V3524. AUTOSAR. The value of uninitialized variable should not be used.

Mar 03 2021

This diagnostic rule is based on the software development guidelines developed by AUTOSAR (AUTomotive Open System ARchitecture).

If a variable of a POD type isn't initialized explicitly and doesn't have an initializer by default, its value will be undefined. Usage of such value will lead to undefined behavior.

Simple synthetic example:

int Aa = Get();
int Ab;
if (Ab) // Ab - uninitialized variable
  Ab = Foo();
else
  Ab = 0;

Usually errors of using uninitialized variables occur through misprints. For example, it may appear that a different variable should be used in this place. Correct code variant:

int Aa = Get();
int Ab;
if (Aa) // OK
  Ab = Foo();
else
  Ab = 0;

This diagnostic is classified as:

  • AUTOSAR-M8.5.1
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