src: unregister Isolate with platform before disposing #30909
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I previously thought the order of these calls was no longer relevant. I was wrong. This commit undoes the changes from 312c02d, adds a comment explaining why I was wrong, and flips the order of the calls elsewhere for consistency, the latter having been the goal of 312c02d. Fixes: nodejs#30846 Refs: nodejs#30181
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Landed in 25447d8 |
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I previously thought the order of these calls was no longer relevant. I was wrong. This commit undoes the changes from 312c02d, adds a comment explaining why I was wrong, and flips the order of the calls elsewhere for consistency, the latter having been the goal of 312c02d. Fixes: #30846 Refs: #30181 PR-URL: #30909 Reviewed-By: Shelley Vohr <[email protected]> Reviewed-By: Richard Lau <[email protected]> Reviewed-By: Jiawen Geng <[email protected]> Reviewed-By: Gus Caplan <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Rich Trott <[email protected]>
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I previously thought the order of these calls was no longer relevant. I was wrong. This commit undoes the changes from 312c02d, adds a comment explaining why I was wrong, and flips the order of the calls elsewhere for consistency, the latter having been the goal of 312c02d. Fixes: #30846 Refs: #30181 PR-URL: #30909 Reviewed-By: Shelley Vohr <[email protected]> Reviewed-By: Richard Lau <[email protected]> Reviewed-By: Jiawen Geng <[email protected]> Reviewed-By: Gus Caplan <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Rich Trott <[email protected]>
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I previously thought the order of these calls was no longer relevant. I was wrong. This commit undoes the changes from 312c02d, adds a comment explaining why I was wrong, and flips the order of the calls elsewhere for consistency, the latter having been the goal of 312c02d. Fixes: #30846 Refs: #30181 PR-URL: #30909 Reviewed-By: Shelley Vohr <[email protected]> Reviewed-By: Richard Lau <[email protected]> Reviewed-By: Jiawen Geng <[email protected]> Reviewed-By: Gus Caplan <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Rich Trott <[email protected]>
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I previously thought the order of these calls was no longer relevant. I was wrong. This commit undoes the changes from 312c02d, adds a comment explaining why I was wrong, and flips the order of the calls elsewhere for consistency, the latter having been the goal of 312c02d. Fixes: #30846 Refs: #30181 PR-URL: #30909 Reviewed-By: Shelley Vohr <[email protected]> Reviewed-By: Richard Lau <[email protected]> Reviewed-By: Jiawen Geng <[email protected]> Reviewed-By: Gus Caplan <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Rich Trott <[email protected]>
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This caused some regression on v12.x so I'm going to revert it in 12.16.1 Adding backport label so we can still get it landed |
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This works around a situation in which the V8 WASM code calls into the platform while the Isolate is being disposed. This goes against the V8 API constract for `v8::Platform`. In lieu of a proper fix, it should be okay to keep the Isolate registered; the race condition fixed by 25447d8 cannot occur for the `NodeMainInstance`’s Isolate, as it is the last one to exit in any given Node.js process. This partially reverts 25447d8. Refs: nodejs#30909 Refs: nodejs#31752
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addaleax
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This works around a situation in which the V8 WASM code calls into the platform while the Isolate is being disposed. This goes against the V8 API constract for `v8::Platform`. In lieu of a proper fix, it should be okay to keep the Isolate registered; the race condition fixed by 25447d8 cannot occur for the `NodeMainInstance`’s Isolate, as it is the last one to exit in any given Node.js process. This partially reverts 25447d8. Refs: #30909 Refs: #31752 PR-URL: #31795 Reviewed-By: Denys Otrishko <[email protected]> Reviewed-By: James M Snell <[email protected]>
addaleax
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Feb 14, 2020
This works around a situation in which the V8 WASM code calls into the platform while the Isolate is being disposed. This goes against the V8 API constract for `v8::Platform`. In lieu of a proper fix, it should be okay to keep the Isolate registered; the race condition fixed by 25447d8 cannot occur for the `NodeMainInstance`’s Isolate, as it is the last one to exit in any given Node.js process. This partially reverts 25447d8. Refs: #30909 Refs: #31752 PR-URL: #31795 Reviewed-By: Denys Otrishko <[email protected]> Reviewed-By: James M Snell <[email protected]>
codebytere
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This works around a situation in which the V8 WASM code calls into the platform while the Isolate is being disposed. This goes against the V8 API constract for `v8::Platform`. In lieu of a proper fix, it should be okay to keep the Isolate registered; the race condition fixed by 25447d8 cannot occur for the `NodeMainInstance`’s Isolate, as it is the last one to exit in any given Node.js process. This partially reverts 25447d8. Refs: #30909 Refs: #31752 PR-URL: #31795 Reviewed-By: Denys Otrishko <[email protected]> Reviewed-By: James M Snell <[email protected]>
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IIUC, this is no longer removed from v12.x |
addaleax
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Feb 18, 2020
Discard tasks silently that are posted when the Isolate is being disposed. It is not possible to avoid a race condition window between unregistering the Isolate with the platform and disposing it in which background tasks and the Isolate deinit steps themselves may lead to new tasks being posted. The only sensible action in that case is discarding the tasks. Fixes: nodejs#31752 Fixes: https://bugs.chromium.org/p/v8/issues/detail?id=10104 Refs: https://chromium-review.googlesource.com/c/v8/v8/+/2061548 Refs: nodejs#31795 Refs: nodejs#30909
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Discard tasks silently that are posted when the Isolate is being disposed. It is not possible to avoid a race condition window between unregistering the Isolate with the platform and disposing it in which background tasks and the Isolate deinit steps themselves may lead to new tasks being posted. The only sensible action in that case is discarding the tasks. Fixes: #31752 Fixes: https://bugs.chromium.org/p/v8/issues/detail?id=10104 Refs: https://chromium-review.googlesource.com/c/v8/v8/+/2061548 Refs: #31795 Refs: #30909 PR-URL: #31853 Reviewed-By: Joyee Cheung <[email protected]>
MylesBorins
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Discard tasks silently that are posted when the Isolate is being disposed. It is not possible to avoid a race condition window between unregistering the Isolate with the platform and disposing it in which background tasks and the Isolate deinit steps themselves may lead to new tasks being posted. The only sensible action in that case is discarding the tasks. Fixes: #31752 Fixes: https://bugs.chromium.org/p/v8/issues/detail?id=10104 Refs: https://chromium-review.googlesource.com/c/v8/v8/+/2061548 Refs: #31795 Refs: #30909 PR-URL: #31853 Reviewed-By: Joyee Cheung <[email protected]>
codebytere
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Mar 21, 2020
Discard tasks silently that are posted when the Isolate is being disposed. It is not possible to avoid a race condition window between unregistering the Isolate with the platform and disposing it in which background tasks and the Isolate deinit steps themselves may lead to new tasks being posted. The only sensible action in that case is discarding the tasks. Fixes: #31752 Fixes: https://bugs.chromium.org/p/v8/issues/detail?id=10104 Refs: https://chromium-review.googlesource.com/c/v8/v8/+/2061548 Refs: #31795 Refs: #30909 PR-URL: #31853 Reviewed-By: Joyee Cheung <[email protected]>
codebytere
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Discard tasks silently that are posted when the Isolate is being disposed. It is not possible to avoid a race condition window between unregistering the Isolate with the platform and disposing it in which background tasks and the Isolate deinit steps themselves may lead to new tasks being posted. The only sensible action in that case is discarding the tasks. Fixes: #31752 Fixes: https://bugs.chromium.org/p/v8/issues/detail?id=10104 Refs: https://chromium-review.googlesource.com/c/v8/v8/+/2061548 Refs: #31795 Refs: #30909 PR-URL: #31853 Reviewed-By: Joyee Cheung <[email protected]>
codebytere
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Discard tasks silently that are posted when the Isolate is being disposed. It is not possible to avoid a race condition window between unregistering the Isolate with the platform and disposing it in which background tasks and the Isolate deinit steps themselves may lead to new tasks being posted. The only sensible action in that case is discarding the tasks. Fixes: #31752 Fixes: https://bugs.chromium.org/p/v8/issues/detail?id=10104 Refs: https://chromium-review.googlesource.com/c/v8/v8/+/2061548 Refs: #31795 Refs: #30909 PR-URL: #31853 Reviewed-By: Joyee Cheung <[email protected]>
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I previously thought the order of these calls was no longer
relevant. I was wrong.
This commit undoes the changes from 312c02d, adds a comment
explaining why I was wrong, and flips the order of the calls
elsewhere for consistency, the latter having been the goal
of 312c02d.
Fixes: #30846
Refs: #30181
/cc @codebytere
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes