BADMACRO.STDARG_H : Use of <stdarg.h> Feature

JavaScript is not currently enabled, but is required for full CodeSonar manual search and browse functionality.

If you are viewing this file in your hub's Web GUI, enable JavaScript in your browser: you will also need it for GUI functionality.

If you opened this file directly from disk, your browser may be directly suppressing JavaScript functionality: certain browsers perform this suppression on local files (but not files delivered by web servers) for security reasons.

If you access the manual through the hub's Web GUI, the functionality will not be suppressed because the hub is a web server.
Alternatively, your browser may allow you to explicitly disable the security setting that suppresses functionality. See the CodeSonar FAQ for more information.

A use of one of the following macros from <stdarg.h>: va_arg(), va_start(), va_end(), va_copy().

Class Name

Use of <stdarg.h> Feature

Significance

reliability

Mnemonic

BADMACRO.STDARG_H

Categories

MisraC2023	MisraC2023:17.1	The standard header file <stdarg.h> shall not be used
Misra2012	Misra2012:17.1	The standard header file <stdarg.h> shall not be used
AUTOSARC++14	AUTOSARC++14:A1-1-1	All code shall conform to ISO/IEC 14882:2014 - Programming Language C++ and shall not use deprecated features.
MisraC++2023	MisraC++2023:4.1.2	Deprecated features should not be used
	MisraC++2023:21.10.1	The features of <cstdarg> shall not be used
CERT-C	CERT-C:EXP47-C	Do not call va_arg with an argument of the incorrect type
	CERT-C:MSC38-C	Do not treat a predefined identifier as an object if it might only be implemented as a macro
	CERT-C:MSC39-C	Do not call va_arg() on a va_list that has an indeterminate value
CERT-CPP	CERT-CPP:EXP58-CPP	Pass an object of the correct type to va_start

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="Use of <stdarg.h> Feature"

#include <stdarg.h>

int var_add ( int numargs, ... ){    
    int retval=0;
    int i;
    va_list args;                        /* 'Use of <stdarg.h> Feature' warning issued here */
    
    va_start(args, numargs);             /* 'Use of <stdarg.h> Feature' warning issued here */
    for (i = 0; i < numargs; i++){
        retval += va_arg(args, int);     /* 'Use of <stdarg.h> Feature' warning issued here */
    }
    va_end(args);                        /* 'Use of <stdarg.h> Feature' warning issued here */
    return retval;
}

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

BADMACRO.STDARG_H : Use of <stdarg.h> Feature

Summary

Properties

Example

Relevant Configuration File Parameters