gh-137400: Stop the world when swapping profile functions#137472
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godlygeek wants to merge 2 commits intopython:mainfrom
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gh-137400: Stop the world when swapping profile functions#137472godlygeek wants to merge 2 commits intopython:mainfrom
godlygeek wants to merge 2 commits intopython:mainfrom
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One thread's profile function or profile object can be changed from another thread, for instance by `sys._setprofileallthreads`. This can lead to crashes unless the two threads are synchronized. We need a stop-the-world to ensure that the thread whose profile function or profile object is being changed is in a state where it's not in the middle of using either of those pointers. Signed-off-by: Matt Wozniski <[email protected]>
Signed-off-by: Matt Wozniski <[email protected]>
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CC: @colesbury @pablogsal |
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Ah, nevermind, I see @colesbury beat me to it with #137471 and added a test to boot. |
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One thread's profile function or profile object can be changed from another thread, for instance by
sys._setprofileallthreads. This can lead to crashes unless the two threads are synchronized. We need a stop-the-world to ensure that the thread whose profile function or profile object is being changed is in a state where it's not in the middle of using either of those pointers.sys._setprofileallthreadsrace condition #137400