LANG.STRUCT.MRS : Missing Return Statement

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At least one path through a non-void return-type function does not contain a return statement.

Class Name

Missing Return Statement

Significance

reliability

Mnemonic

LANG.STRUCT.MRS

Categories

MisraC2023	MisraC2023:17.4	All exit paths from a function with non-void return type shall have an explicit return statement with an expression
Misra2012	Misra2012:17.4	All exit paths from a function with non-void return type shall have an explicit return statement with an expression
Misra2004	Misra2004:16.8	All exit paths from a function with non-void return type shall have an explicit return statement with an expression
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.
	AUTOSARC++14:A8-4-2	All exit paths from a function with non-void return type shall have an explicit return statement with an expression.
MisraC++2008	MisraC++2008:8-4-3	All exit paths from a function with non-void return type shall have an explicit return statement with an expression.
MisraC++2023	MisraC++2023:4.1.2	Deprecated features should not be used
	MisraC++2023:9.6.5	A function with non-void return type shall return a value on all paths
CWE	CWE:758	Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
	CWE:1076	Insufficient Adherence to Expected Conventions
	CWE:1120	Excessive Code Complexity
CERT-C	CERT-C:MSC37-C	Ensure that control never reaches the end of a non-void function
CERT-CPP	CERT-CPP:MSC52-CPP	Value-returning functions must return a value from all exit paths

Availability

Available for C and C++.

Enabling

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

WARNING_FILTER += discard class="Missing Return Statement"

int lang_struct_mrs(int j) {
    if (j == 1) return 2; 
    else if (j==2) return 1; 
}                             /* 'Missing Return Statement' warning issued here */

int main(void) {
    int ret = lang_struct_mrs(3);
    return ret;
}

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

LANG.STRUCT.MRS : Missing Return Statement

Summary

Properties

Example

Relevant Configuration File Parameters