CCB: Fix trying to unlock mutex not held by any thread

[LitvinenkoIra]

Bug Report

Data races related to MessageQueue

Detailed analysis:

Mutex released before call Broadcast.

Reproduction Steps

1. TBD

Expected Behavior

SDL should not crash

Observed Behavior

SDL crashed

OS & Version Information

• OS/Version : SYNC4
• SDL Core Version: https://github.com/smartdevicelink/sdl_core/releases/tag/5.0.1
• Testing Against: SYNC4 Applink

[E-SAITO-TMC]

@joeygrover -san @theresalech -san This issue is a high priority for Toyota. Could you please tell me reproduction steps? Also, Does this issue occur in the latest version?

[theresalech]

Hi @E-SAITO-TMC, we have documented that this is priority for Toyota, and will include for Steering Committee review and vote when planning the contents for the Q4 Core release. This planning will take place in June.
@LitvinenkoIra, can you please provide reproduction steps for this issue? If you could also advise if the Luxoft team is seeing this issue in Core 6.1, that would be most helpful!

[LuxoftAKutsan]

This issue has ho reproduction steps.
It was found by the Hellgrind dynamic code analysis tool in the SYNC environment.
PR to open now available #3380
Regression with automated tests will be performed.