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bitbake: event: Fix an event duplication race

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It is possible for multple bitbake threads to empty ui_queue in parallel
leading to duplicate console messages and much confusion when debuging.

Use the lock to extract the queue data which means only one thread will
processing, removing the duplicate out of order messages.

(Bitbake rev: 945095602e40d54efb8de494218f4a2b25c9969f)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie
2025-07-16 16:14:04 +01:00
parent e16dd31445
commit b7173ca225
1 changed files with 5 additions and 2 deletions
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7
bitbake/lib/bb/event.py
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@@ -236,9 +236,12 @@ def fire(event, d):
# If messages have been queued up, clear the queue
global _uiready, ui_queue
if _uiready and ui_queue:
for queue_event in ui_queue:
with bb.utils.lock_timeout_nocheck(_thread_lock):
queue = ui_queue
ui_queue = []
for queue_event in queue:
fire_ui_handlers(queue_event, d)
ui_queue = []
fire_ui_handlers(event, d)
def fire_from_worker(event, d):