LANG.CAST.PC.CRVQ : Cast Removes volatile Qualifier

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C and C++

LANG.CAST.PC.CRVQ : Cast Removes volatile Qualifier

Summary

A pointer cast removes a volatile qualifier from the pointed-to type.

Properties

Class Name

Cast Removes volatile Qualifier

Significance

reliability

Mnemonic

LANG.CAST.PC.CRVQ

Categories

MisraC2025	MisraC2025:11.8	A conversion shall not remove any const, volatile or _Atomic qualification from the type pointed to by a pointer
MisraC2023	MisraC2023:11.8	A conversion shall not remove any const, volatile or _Atomic qualification from the type pointed to by a pointer
Misra2012	Misra2012:11.8	A conversion shall not remove any const, volatile or _Atomic qualification from the type pointed to by a pointer
Misra2004	Misra2004:11.5	A cast shall not be performed that removes any const or volatile qualification from the type addressed by a pointer
AUTOSARC++14	AUTOSARC++14:A5-2-3	A cast shall not remove any const or volatile qualification from the type of a pointer or reference.
MisraC++2008	MisraC++2008:5-2-5	A cast shall not remove any const or volatile qualification from the type of a pointer or reference.
MisraC++2023	MisraC++2023:8.2.3	A cast shall not remove any const or volatile qualification from the type accessed via a pointer or by reference
CWE	CWE:704	Incorrect Type Conversion or Cast
TS17961	TS17961:5.1-ptrcomp	Accessing an object through a pointer to an incompatible type
JSF++	JSF++:182	Type casting from any type to or from pointers shall not be used.
	JSF++:183	Every possible measure should be taken to avoid type casting.

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.

RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Cast Removes volatile Qualifier"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Example

volatile int y = 5; 

int cast_y(void){
    int *py = (int *)&y;  /* 'Cast Removes volatile Qualifier' warning issued here */
    int *cpy = &y;                 /* not a cast ('Bad Initializer Type' warning issued) */
    return (int)y;                 /* not a pointer cast */
}

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

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