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bitbake: server/process: Disable gc around critical section

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The python gc can trigger whilst we're holding the event stream lock
and when cleaning up objects, they can trigger warnings. This translates
into a new event which would then need the lock and we can deadlock.

Disable gc whilst we hold that lock to avoid this unfortunate and
problematic situation.

(Bitbake rev: d01d8326331cfe59208674cfc53aa26c0028b313)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 96a6303949cefd469bcf5ed250ff512271354357)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie 2022-04-16 09:17:10 -10:00
parent 52645c8607
commit eee9fba7b4
1 changed files with 3 additions and 0 deletions
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3
bitbake/lib/bb/server/process.py
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@ -26,6 +26,7 @@ import errno
import re
import datetime
import pickle
import gc
import bb.server.xmlrpcserver
from bb import daemonize
from multiprocessing import queues
@ -737,8 +738,10 @@ class ConnectionWriter(object):
def send(self, obj):
obj = multiprocessing.reduction.ForkingPickler.dumps(obj)
gc.disable()
with self.wlock:
self.writer.send_bytes(obj)
gc.enable()
def fileno(self):
return self.writer.fileno()