LANG.CAST.PC.FN2DATA : Conversion from Function

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LANG.CAST.PC.FN2DATA : Conversion from Function Pointer

A value of function pointer type is cast or coerced to a non-function-pointer type.

Class Name

Conversion from Function Pointer

Significance

security

Mnemonic

LANG.CAST.PC.FN2DATA

Categories

MisraC2023	MisraC2023:11.1	Conversions shall not be performed between a pointer to a function and any other type
Misra2012	Misra2012:11.1	Conversions shall not be performed between a pointer to a function and any other type
AUTOSARC++14	AUTOSARC++14:M5-2-6	A cast shall not convert a pointer to a function to any other pointer type, including a pointer to function type.
	AUTOSARC++14:M8-4-4	A function identifier shall either be used to call the function or it shall be preceded by &.
MisraC++2008	MisraC++2008:5-2-6	A cast shall not convert a pointer to a function to any other pointer type, including a pointer to function type.
	MisraC++2008:5-2-7	An object with pointer type shall not be converted to an unrelated pointer type, either directly or indirectly.
	MisraC++2008:8-4-4	A function identifier shall either be used to call the function or it shall be preceded by &.
MisraC++2023	MisraC++2023:8.2.4	Casts shall not be performed between a pointer to a function and any other type
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
	TS17961:5.6-argcomp	5.6. Calling functions with incorrect arguments
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.
JPL	JPL:30	Do not cast function pointers into other types.

Availability

Available for C and C++.

Enabling

Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += allow class="Conversion from Function Pointer"

typedef int (*TakesIntRetsInt)(int) ;

int PC_FN2DATA(TakesIntRetsInt f){
    int x = (int) f; /* 'Conversion from Function Pointer' warning issued here */
    int y = f;       /* 'Conversion from Function Pointer' warning issued here */
    return x + y;
}

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

LANG.CAST.PC.FN2DATA : Conversion from Function Pointer

Summary

Properties

Example

See also

Relevant Configuration File Parameters