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

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

Class Name

Cast Removes volatile Qualifier

Significance

reliability

Mnemonic

LANG.CAST.PC.CRVQ

Categories

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	5.1. 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.

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 */
    return (int)y;                 /* not a pointer cast */
}

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

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

Summary

Properties

Example

Relevant Configuration File Parameters