CONCURRENCY.TNJ : Thread is not Joinable

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CodeSonar^® 9.2p0

CONFIDENTIAL

CodeSecure Inc

CONCURRENCY.TNJ : Thread is not Joinable

Summary

Properties

MisraC2025

MisraC2025:22.11

A thread that was previously either joined or detached shall not be subsequently joined nor detached

MisraC2025:D.4.13

Functions which are designed to provide operations on a resource should be called in an appropriate sequence

MisraC2023

MisraC2023:22.11

A thread that was previously either joined or detached shall not be subsequently joined nor detached

MisraC2023:D.4.13

Functions which are designed to provide operations on a resource should be called in an appropriate sequence

Misra2012

Misra2012:22.11

A thread that was previously either joined or detached shall not be subsequently joined nor detached

Misra2012:D.4.13

Functions which are designed to provide operations on a resource should be called in an appropriate sequence

MisraC++2023

MisraC++2023:0.3.2

A function call shall not violate the function's preconditions

CWE

CWE:666

Operation on Resource in Wrong Phase of Lifetime

CWE:696

Incorrect Behavior Order

CERT-C

CERT-C:CON39-C

Do not join or detach a thread that was previously joined or detached

Example

#include <pthread.h>

void * thread_func( void * arg ) { return arg; }

void concurrency_tnj( void ){
    pthread_t t;

    if ( pthread_create( &t, NULL, thread_func, NULL) ) {return;}

    if ( pthread_join( t, NULL )) {return;}             /* ok: if execution reaches this call, the pthread_create()
                                                         * call was successful and t is joinable
                                                         */

    pthread_join( t, NULL ); /* 'Thread is not Joinable' warning issued here:
                              * if execution reaches this call, the previous call to pthread_join()
                              * was successful and t is no longer joinable
                              */
}

Triggering Functions

CodeSonar ships with library models that allow it to recognize functions such as libc pthread_join()/pthread_detach() that join or detach a thread. If one of these functions is called when the thread has already been joined or detached, a warning will be issued.

If you have created a custom library model for some function f() in terms of one of these existing models, calls to f() will also be capable of triggering Thread is not Joinable warnings.

Relevant Configuration File Parameters

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