LANG.STRUCT.LOOP.MAE : Multiple Abnormal Loop Exits

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.

CodeSonar^® 9.2p0

CONFIDENTIAL

CodeSecure Inc

C and C++

LANG.STRUCT.LOOP.MAE : Multiple Abnormal Loop Exits

Summary

A loop contains more than one abnormal exit point (break or goto statement).

Properties

Class Name

Multiple Abnormal Loop Exits

Significance

style

Mnemonic

LANG.STRUCT.LOOP.MAE

Categories

MisraC2025	MisraC2025:15.4	There should be no more than one break or goto statement used to terminate any iteration statement
MisraC2023	MisraC2023:15.4	There should be no more than one break or goto statement used to terminate any iteration statement
Misra2012	Misra2012:15.4	There should be no more than one break or goto statement used to terminate any iteration statement
Misra2004	Misra2004:14.6	For any iteration statement there shall be at most one break statement used for loop termination
MisraC++2008	MisraC++2008:6-6-4	For any iteration statement there shall be no more than one break or goto statement used for loop termination.
CWE	CWE:1120	Excessive Code Complexity
JSF++	JSF++:191	The break statement shall not be used (except to terminate the cases of a switch statement).

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="Multiple Abnormal Loop Exits"

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

void multiloopexit(int i){
    int x;
    for (x=0; x < 10; x++){   /* 'Multiple Abnormal Loop Exits' warning issued here. */
        if (x < i) { break;}
        /* ... */
        if (x < 2*i) {break;}
    }
}

void notmultiloopexit(int i){
    int x,y;
    for (x=0; x < 10; x++){             /* ok: this loop only has one abnormal exit. */
      if (x < i) { break;}                          /* exits from outer loop */
        /* ... */
        for (y = 0; y < 10; y++){       /* ok: this loop only has one abnormal exit. */  
            if (y < i) {break;}                     /* exits from inner loop to outer loop */
            /* ... */
        }
    }
}

Relevant Configuration File Parameters

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

To report problems with this documentation, please visit https://support.codesecure.com/.