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V2571. MISRA. Conversions between point…
Analyzer Diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Diagnosis of micro-optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
MISRA errors
AUTOSAR errors
Additional information
Contents

V2571. MISRA. Conversions between pointers to objects and integer types should not be performed.

Dec. 19, 2019

This diagnostic rule is based on the software development guidelines developed by MISRA (Motor Industry Software Reliability Association).

Conversions between pointers to objects and integer types can lead to undefined, unspecified, or implementation-specific behavior. For that reason, MISRA does not recommend using such conversions.

Example of non-compliant code 1 (C):

int *p = (int *)0x0042;
int i = p;
enum en { A, B } e = (enum en) p;

Example of non-compliant code 2 (C++):

struct S { int16_t i; int16_t j; } *ps = ....;
int i64 = reinterpret_cast<int>(ps);

Example of non-compliant code 3 (C and C++):

void foo(int i) {}

void wrong_param_type()
{
  char *pc = ....;
  foo((int) pc); 
}

Example of non-compliant code 4 (C and C++):

int wrong_return_type()
{
  double *pd = ....;
  return (int) pd;
}

This diagnostic is classified as:

  • MISRA-C-11.4
  • MISRA-C-11.5
  • MISRA-CPP-5.2.8
  • MISRA-CPP-5.2.9
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