tree 66340e367bfb83181bd29e04fd749a65d84a91a2
parent 0fb1e3794b7ee89a317025ceb2579796fc559fd6
author Hao Jiang <jianghao@google.com> 1776748472 +0000
committer Muhammad Usama Chaudhry <muhammadusama@google.com> 1785345212 -0700

mctp: Fix priming race condition using global barrier

Implement a global querying flag and shared barrier counter in
MctpUtil.cpp to postpone all D-Bus events during the priming scan.
This fixes a race condition where concurrent events arriving during the
multi-step priming query could cause stale endpoints or inconsistent
state.

Add Tests 4, 5, and 6 to verify that concurrent events (Add, Remove,
Remove->Add) are correctly deferred and processed after priming
completes. Add #ifdef UNIT_TEST delay in MctpUtil.cpp to simulate the
race condition.

Change-Id: I66aa19275290611ab5f485a19e0282806441d47f
Google-Bug-Id: 490106522
Signed-off-by: Hao Jiang <jianghao@google.com>