To get a trial key
fill out the form below
Team License (standard version)
Enterprise License (extended version)
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
GBP
RUB
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
To get the licence for your open-source project, please fill out this form
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

** This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Message submitted.

Your message has been sent. We will email you at


If you haven't received our response, please do the following:
check your Spam/Junk folder and click the "Not Spam" button for our message.
This way, you won't miss messages from our team in the future.

>
>
>
V2578. MISRA. An identifier with array …
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

V2578. MISRA. An identifier with array type passed as a function argument should not decay to a pointer.

Mar 25 2021

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

This diagnostic rule is only relevant to C++.

If you pass an array to a function by pointer, you will lose the array size. As a result, the function may receive an array with a fewer number of elements as an argument than it is expected. During execution the function may violate array bounds. This will result in undefined behavior.

Pass the array only by reference not to lose data on the array size. If a function needs to handle arrays of different lengths, use a class to encapsulate the array and its size.

Example of code that does not follow the rule:

void foo(int *ptr);
void bar(int arr[5])
void bar(const char chars[30]);

int main
{
  int array[5] = { 1, 2, 3 };
  foo(array);
  bar(array);
}

Acceptable version:

void bar(int (&arr)[5]);

int main
{
  int array[7] = { 1, 2, 3, 4, 5 };
  bar(array);
}

Another code example that does not follow the rule:

void bar(const char chars[30]);

int main()
{
  bar("something");  //const char[10]
}

An acceptable version with a class for encapsulation:

template <typename T>
class ArrayView
{
  T *m_ptr;
  size_t m_size;

public:
  template <size_t N>
  ArrayView(T (&arr)[N]) : m_ptr(arr), m_size(N) {}
  // ....
};

void bar(ArrayView<const char> arr);

int main()
{
  bar("something");
}

This diagnostic is classified as:

  • MISRA-CPP-5.2.12
This website uses cookies and other technology to provide you a more personalized experience. By continuing the view of our web-pages you accept the terms of using these files. If you don't want your personal data to be processed, please, leave this site.
Learn More →
Accept