Fix: GC safety in Thread#start #14558
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ysbaddaden
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Interestingly that caused CI to segfault with Of course, no stacktrace and I can't reproduce. |
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It seems to be creating parallelism issues with the GC instead of fixing them.
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Follow up to #14554 where a comment by @yxhuvud made me realize that
Thread#startwasn't exactly GC safe, in that a GC collection could happen in parallel to a thread starting and it could free the Thread object before the thread is started or before the thread is properly shutdown.The patch mostly moves the calls to add/remove the thread object from the linked list, along with some explanations.
Note: only the last commit is relevant, the rest is from #14554.