Our website uses cookies to enhance your browsing experience.
Accept
to the top
close form

Fill out the form in 2 simple steps below:

Your contact information:

Step 1
Congratulations! This is your promo code!

Desired license type:

Step 2
Team license
Enterprise license
** By clicking this button you agree to our Privacy Policy statement
close form
Request our prices
New License
License Renewal
--Select currency--
USD
EUR
* By clicking this button you agree to our Privacy Policy statement

close form
Free PVS‑Studio license for Microsoft MVP specialists
* By clicking this button you agree to our Privacy Policy statement

close form
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

close form
I am interested to try it on the platforms:
* By clicking this button you agree to our Privacy Policy statement

close form
check circle
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.

>
>
>
V630. The 'malloc' function is used to …
menu mobile close menu
Analyzer diagnostics
General Analysis (C++)
General Analysis (C#)
General Analysis (Java)
Micro-Optimizations (C++)
Diagnosis of 64-bit errors (Viva64, C++)
Customer specific requests (C++)
MISRA errors
AUTOSAR errors
OWASP errors (C#)
Problems related to code analyzer
Additional information
toggle menu Contents

V630. The 'malloc' function is used to allocate memory for an array of objects that are classes containing constructors/destructors.

Jul 20 2012

The analyzer has detected a potential error caused by using one of the dynamic memory allocation functions such as malloc, calloc, realloc. The allocated memory is being handled as an object array that has a constructor or a destructor. When memory is allocated for the class in this way, the code does not call the constructor. When memory is released through the 'free()' function, the code does not call the destructor. This is quite odd: such a code might cause handling uninitialized variables and other errors.

Consider an example of incorrect code:

class CL
{
  int num;
public:
  CL() : num(0) {...}
  ...
}; 
... 
CL *pCL = (CL*)malloc(sizeof(CL) * 10);

As a result, the 'num' variable won't be initialized. Of course, you can call the constructor for each object "manually", but a more correct way is to use the 'new' operator.

This is the fixed code:

CL *pCL = new CL[10];

This diagnostic is classified as:

You can look at examples of errors detected by the V630 diagnostic.