src: let Environments on one isolate share a cleanup hook - #65777
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Codecov Report❌ Patch coverage is
Additional details and impacted files@@ Coverage Diff @@
## main #65777 +/- ##
==========================================
- Coverage 90.17% 90.16% -0.02%
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Files 771 771
Lines 265097 265111 +14
Branches 50362 50371 +9
==========================================
- Hits 239054 239027 -27
- Misses 17004 17014 +10
- Partials 9039 9070 +31
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The registry behind `AddEnvironmentCleanupHook()` is keyed on
{isolate, fun, arg} and asserts that every insertion is unique. Two
Environments on one isolate that register the same hook, which the
Node-API documentation allows per environment, abort the process on
the second `napi_add_env_cleanup_hook()`.
Key the registry on `arg` only and tell entries apart by Environment:
adding the same hook to one Environment twice still aborts as
documented, and removal prefers the current Environment's registration,
falling back to a matching one from another Environment when there is
no current context. Because the entry to remove after a hook has run can
no longer be found by {isolate, fun, arg} alone, `CleanupHookThunkRun()`
marks its entry as running and erases exactly that entry afterwards; a
removal of a running entry (a hook removing itself, as `~ObjectWrap()`
does) is a no-op, which keeps the use-after-free fixed by nodejs#65630 fixed.
Refs: nodejs#63985
Refs: nodejs#65630
Signed-off-by: Shelley Vohr <shelley.vohr@gmail.com>
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Two Environments that share an isolate and register the same cleanup hook abort the process on the second
napi_add_env_cleanup_hook(), which is a normal thing for an addon loaded into several Environments to do (Electron subframes and same-process child windows share Blink's isolate). The process-global registry from #63985 is keyed on{isolate, fun, arg}and CHECKs that every insertion is unique.The registry is now keyed on
argwith the Environment carried in each entry: the same hook twice in one Environment still aborts as documented, removal prefers the current Environment's entry and falls back to a matching one, and a running hook's entry is erased byCleanupHookThunkRun()itself so a hook that removes itself (as~ObjectWrap()does) stays safe, keeping #65630 fix intact.Tests:
EnvironmentTest.SameCleanupHookInTwoEnvironmentsOnOneIsolate(aborted before),RemoveCleanupHookOfOtherEnvironmentOnSameIsolate,CleanupHookRemovesItselfWhileRunning;test/addons,test/node-apiandtest/js-native-apipass.Refs: #63985
Refs: #65630
Disclosure: the code, tests and this description were written by Claude Code, directed and reviewed by @codebytere.