embedding: provide hook for custom process.exit() behaviour #32531

addaleax · 2020-03-28T01:49:31Z

Embedders may not want to terminate the process when process.exit()
is called. This provides a hook for more flexible handling of that
situation.

Refs: #30467 (comment) (/cc @linroid)

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
tests and/or benchmarks are included
documentation is changed or added
commit message follows commit guidelines

nodejs-github-bot · 2020-03-28T01:50:13Z

CI: https://ci.nodejs.org/job/node-test-pull-request/30146/

nodejs-github-bot · 2020-03-28T13:26:20Z

CI: https://ci.nodejs.org/job/node-test-pull-request/30150/

nodejs-github-bot · 2020-03-28T13:29:48Z

CI: https://ci.nodejs.org/job/node-test-pull-request/30151/ (:heavy_check_mark:)

himself65 · 2020-03-28T13:37:14Z

no doc update?

addaleax · 2020-03-28T13:38:49Z

@himself65 The documentation for our public C++ API is provided as comments in node.h – that’s the customary way of documenting C++ APIs. We have an embedding doc now, but that’s mostly there to provide an example, and also links to node.h for more information.

gireeshpunathil · 2020-03-29T03:24:10Z

src/env.cc

-  } else {
-    worker_context()->Exit(exit_code);
-  }
+  stop_sub_worker_contexts();


isn't this an un-necessary call for workers?

@gireeshpunathil So … no, but thanks for pointing this out.

My line of thinking here was “both the main thread and Workers perform this call anyway, so why not do it at the same time so that behavior is more similar and therefore less prone to bugs”.

While that was not wrong, it introduced a bug that I wouldn’t have noticed if you hadn’t commented; Because this happens without setting can_call_into_js() to false, the Workers are stopped and their exit events would be emitted. We generally don’t want asynchronous resources to emit events during process.exit(), so that’s a bug.

The change here meant that this bug would also occur when running nested Workers, but on the main thread, it has been present before. I’ve opened #32546 fixes that (and this PR is rebased on top of it), and marked this PR as blocked until that one lands, because this is semver-minor and the other PR is semver-patch, and our tooling doesn’t like mixing them.

I’ve also added a commit here that makes Stop(env) stop Worker threads – that seems like a sensible thing to do, and achieves my original goal of being more consistent between Worker threads and the main thread.

gireeshpunathil · 2020-03-29T03:27:58Z

src/node.h

@@ -473,6 +473,17 @@ NODE_EXTERN v8::MaybeLocal<v8::Value> LoadEnvironment(
    std::unique_ptr<InspectorParentHandle> inspector_parent_handle = {});
 NODE_EXTERN void FreeEnvironment(Environment* env);

+// Set a callback that is called when process.exit() is called from JS.


called when process.exit() is called from JS. might make some users think that the callback in invoked after the default process.exit has been actioned?

called in response to process.exit() call from JS. may be a better wording?

called when process.exit() is called from JS. might make some users think that the callback in invoked after the default process.exit has been actioned?

The default process.exit() terminates the process, which by definition precludes any other code from being run afterwards, so I don’t think that that is a very likely reading of this phrasing (or at least one that would appear self-contradictory).

called in response to process.exit() call from JS. may be a better wording?

I’d be worried that that makes it sound like an asynchronous call, when it is really called during process.exit() itself.

I’ve added wording that explicitly specifies that this overrides the default handler, I hope that helps.

addaleax · 2020-03-29T13:20:18Z

Blocked until #32546 lands, see #32531 (comment) for details

EDIT: Also blocked on #32548

nodejs-github-bot · 2020-03-29T13:21:16Z

CI: https://ci.nodejs.org/job/node-test-pull-request/30166/

Embedders may not want to terminate the process when `process.exit()` is called. This provides a hook for more flexible handling of that situation. Refs: nodejs#30467 (comment)

This makes sense given that terminating execution of the parent thread this way likely also is supposed to stop all running Worker threads spawned by it.

nodejs-github-bot · 2020-04-02T00:47:44Z

CI: https://ci.nodejs.org/job/node-test-pull-request/30353/

nodejs-github-bot · 2020-04-02T10:08:00Z

CI: https://ci.nodejs.org/job/node-test-pull-request/30367/

Embedders may not want to terminate the process when `process.exit()` is called. This provides a hook for more flexible handling of that situation. Refs: #30467 (comment) PR-URL: #32531 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: James M Snell <jasnell@gmail.com>

This makes sense given that terminating execution of the parent thread this way likely also is supposed to stop all running Worker threads spawned by it. PR-URL: #32531 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: James M Snell <jasnell@gmail.com>

Embedders may not want to terminate the process when `process.exit()` is called. This provides a hook for more flexible handling of that situation. Refs: nodejs#30467 (comment) PR-URL: nodejs#32531 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: James M Snell <jasnell@gmail.com>

This makes sense given that terminating execution of the parent thread this way likely also is supposed to stop all running Worker threads spawned by it. PR-URL: nodejs#32531 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: James M Snell <jasnell@gmail.com>

Embedders may not want to terminate the process when `process.exit()` is called. This provides a hook for more flexible handling of that situation. Refs: #30467 (comment) Backport-PR-URL: #35241 PR-URL: #32531 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: James M Snell <jasnell@gmail.com>

This makes sense given that terminating execution of the parent thread this way likely also is supposed to stop all running Worker threads spawned by it. Backport-PR-URL: #35241 PR-URL: #32531 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: James M Snell <jasnell@gmail.com>

Notable changes: async_hooks: * add AsyncResource.bind utility (James M Snell) (#34574) buffer: * also alias BigUInt methods (Anna Henningsen) (#34960) * alias UInt ➡️ Uint in buffer methods (Anna Henningsen) (#34729) build: * add build flag for OSS-Fuzz integration (davkor) (#34761) cli: * add alias for report-directory to make it consistent (Ash Cripps) (#33587) crypto: * allow KeyObjects in postMessage (Tobias Nießen) (#33360) * add randomInt function (Oli Lalonde) (#34600) deps: * upgrade to libuv 1.39.0 (Colin Ihrig) (#34915) dgram: * add IPv6 scope id suffix to received udp6 dgrams (Pekka Nikander) (#14500) * allow typed arrays in .send() (Sarat Addepalli) (#22413) doc: * add basic embedding example documentation (Anna Henningsen) (#30467) embedding: * make Stop() stop Workers (Anna Henningsen) (#32531) * provide hook for custom process.exit() behaviour (Anna Henningsen) (#32531) fs: * implement lutimes (Maël Nison) (#33399) http: * return this from IncomingMessage#destroy() (Colin Ihrig) (#32789) * expose host and protocol on ClientRequest (wenningplus) [#33803](#33803) http2: * return this for Http2ServerRequest#setTimeout (Pranshu Srivastava) (#33994) * do not modify explicity set date headers (Pranshu Srivastava) (#33160) * n-api**: * support type-tagging objects (Gabriel Schulhof) (#28237) * provide asynchronous cleanup hooks (Anna Henningsen) (#34572) perf_hooks: * add idleTime and event loop util (Trevor Norris) (#34938) timers: * allow timers to be used as primitives (Denys Otrishko) [#34017](#34017) tls: * make 'createSecureContext' honor more options (Mateusz Krawczuk) (#33974) worker: * add public method for marking objects as untransferable (Anna Henningsen) (#33979) * emit `'messagerror'` events for failed deserialization (Anna Henningsen) (#33772) * allow passing JS wrapper objects via postMessage (Anna Henningsen) (#33772) * allow transferring/cloning generic BaseObjects (Anna Henningsen) (#33772) * add option to track unmanaged file descriptors (Anna Henningsen) (#34303) * add stack size resource limit option (Anna Henningsen) (#33085) * make FileHandle transferable (Anna Henningsen) (#33772) zlib: * add `maxOutputLength` option (unknown) (#33516) PR-URL: TODO

Notable changes: assert: * (SEMVER-MINOR) port common.mustCall() to assert (ConorDavenport) #31982 async_hooks: * (SEMVER-MINOR) add AsyncResource.bind utility (James M Snell) #34574 buffer: * (SEMVER-MINOR) also alias BigUInt methods (Anna Henningsen) #34960 * (SEMVER-MINOR) alias UInt ➡️ Uint in buffer methods (Anna Henningsen) #34729 build: * (SEMVER-MINOR) add build flag for OSS-Fuzz integration (davkor) #34761 cli: * (SEMVER-MINOR) add alias for report-directory to make it consistent (Ash Cripps) #33587 crypto: * (SEMVER-MINOR) allow KeyObjects in postMessage (Tobias Nießen) #33360 * (SEMVER-MINOR) add randomInt function (Oli Lalonde) #34600 deps: * upgrade to libuv 1.39.0 (Colin Ihrig) #34915 * upgrade npm to 6.14.7 (claudiahdz) #34468 * upgrade to libuv 1.38.1 (Colin Ihrig) #34187 dgram: * (SEMVER-MINOR) add IPv6 scope id suffix to received udp6 dgrams (Pekka Nikander) #14500 * (SEMVER-MINOR) allow typed arrays in .send() (Sarat Addepalli) #22413 doc: * (SEMVER-MINOR) Add maxTotalSockets option to agent constructor (rickyes) #33617 * (SEMVER-MINOR) add basic embedding example documentation (Anna Henningsen) #30467 * add Ricky Zhou to collaborators (rickyes) #34676 * add release key for Ruy Adorno (Ruy Adorno) #34628 * add DerekNonGeneric to collaborators (Derek Lewis) #34602 * add AshCripps to collaborators (Ash Cripps) #34494 * add HarshithaKP to collaborators (Harshitha K P) #34417 * add rexagod to collaborators (Pranshu Srivastava) #34457 * add release key for Richard Lau (Richard Lau) #34397 * add danielleadams to collaborators (Danielle Adams) #34360 * add sxa as collaborator (Stewart X Addison) #34338 * add ruyadorno to collaborators (Ruy Adorno) #34297 * (SEMVER-MAJOR) deprecate process.umask() with no arguments (Colin Ihrig) #32499 embedding: * (SEMVER-MINOR) make Stop() stop Workers (Anna Henningsen) #32531 * (SEMVER-MINOR) provide hook for custom process.exit() behaviour (Anna Henningsen) #32531 fs: * (SEMVER-MINOR) implement lutimes (Maël Nison) #33399 http: * (SEMVER-MINOR) add maxTotalSockets to agent class (rickyes) #33617 * (SEMVER-MINOR) return this from IncomingMessage#destroy() (Colin Ihrig) #32789 * (SEMVER-MINOR) expose host and protocol on ClientRequest (wenningplus) #33803 http2: * (SEMVER-MINOR) return this for Http2ServerRequest#setTimeout (Pranshu Srivastava) #33994 * (SEMVER-MINOR) do not modify explicity set date headers (Pranshu Srivastava) #33160 module: * (SEMVER-MINOR) named exports for CJS via static analysis (Guy Bedford) #35249 * (SEMVER-MINOR) exports pattern support (Guy Bedford) #34718 * (SEMVER-MINOR) package "imports" field (Guy Bedford) #34117 * (SEMVER-MINOR) deprecate module.parent (Antoine du HAMEL) #32217 n-api: * (SEMVER-MINOR) create N-API version 7 (Gabriel Schulhof) #35199 * (SEMVER-MINOR) support type-tagging objects (Gabriel Schulhof) #28237 n-api,src: * (SEMVER-MINOR) provide asynchronous cleanup hooks (Anna Henningsen) #34572 perf_hooks: * (SEMVER-MINOR) add idleTime and event loop util (Trevor Norris) #34938 timers: * (SEMVER-MINOR) allow timers to be used as primitives (Denys Otrishko) #34017 tls: * (SEMVER-MINOR) make 'createSecureContext' honor more options (Mateusz Krawczuk) #33974 worker: * (SEMVER-MINOR) add public method for marking objects as untransferable (Anna Henningsen) #33979 * (SEMVER-MINOR) emit `'messagerror'` events for failed deserialization (Anna Henningsen) #33772 * (SEMVER-MINOR) allow passing JS wrapper objects via postMessage (Anna Henningsen) #33772 * (SEMVER-MINOR) allow transferring/cloning generic BaseObjects (Anna Henningsen) #33772 * (SEMVER-MINOR) add option to track unmanaged file descriptors (Anna Henningsen) #34303 * (SEMVER-MINOR) add stack size resource limit option (Anna Henningsen) #33085 worker,fs: * (SEMVER-MINOR) make FileHandle transferable (Anna Henningsen) #33772 zlib: * (SEMVER-MINOR) add `maxOutputLength` option (unknown) #33516 * switch to lazy init for zlib streams (Andrey Pechkurov) #34048 PR-URL: TODO

Notable changes: assert: * (SEMVER-MINOR) port common.mustCall() to assert (ConorDavenport) #31982 async_hooks: * (SEMVER-MINOR) add AsyncResource.bind utility (James M Snell) #34574 buffer: * (SEMVER-MINOR) also alias BigUInt methods (Anna Henningsen) #34960 * (SEMVER-MINOR) alias UInt ➡️ Uint in buffer methods (Anna Henningsen) #34729 build: * (SEMVER-MINOR) add build flag for OSS-Fuzz integration (davkor) #34761 cli: * (SEMVER-MINOR) add alias for report-directory to make it consistent (Ash Cripps) #33587 crypto: * (SEMVER-MINOR) allow KeyObjects in postMessage (Tobias Nießen) #33360 * (SEMVER-MINOR) add randomInt function (Oli Lalonde) #34600 deps: * upgrade to libuv 1.39.0 (Colin Ihrig) #34915 * upgrade npm to 6.14.7 (claudiahdz) #34468 * upgrade to libuv 1.38.1 (Colin Ihrig) #34187 dgram: * (SEMVER-MINOR) add IPv6 scope id suffix to received udp6 dgrams (Pekka Nikander) #14500 * (SEMVER-MINOR) allow typed arrays in .send() (Sarat Addepalli) #22413 doc: * (SEMVER-MINOR) Add maxTotalSockets option to agent constructor (rickyes) #33617 * (SEMVER-MINOR) add basic embedding example documentation (Anna Henningsen) #30467 * add Ricky Zhou to collaborators (rickyes) #34676 * add release key for Ruy Adorno (Ruy Adorno) #34628 * add DerekNonGeneric to collaborators (Derek Lewis) #34602 * add AshCripps to collaborators (Ash Cripps) #34494 * add HarshithaKP to collaborators (Harshitha K P) #34417 * add rexagod to collaborators (Pranshu Srivastava) #34457 * add release key for Richard Lau (Richard Lau) #34397 * add danielleadams to collaborators (Danielle Adams) #34360 * add sxa as collaborator (Stewart X Addison) #34338 * add ruyadorno to collaborators (Ruy Adorno) #34297 * (SEMVER-MAJOR) deprecate process.umask() with no arguments (Colin Ihrig) #32499 embedding: * (SEMVER-MINOR) make Stop() stop Workers (Anna Henningsen) #32531 * (SEMVER-MINOR) provide hook for custom process.exit() behaviour (Anna Henningsen) #32531 fs: * (SEMVER-MINOR) implement lutimes (Maël Nison) #33399 http: * (SEMVER-MINOR) add maxTotalSockets to agent class (rickyes) #33617 * (SEMVER-MINOR) return this from IncomingMessage#destroy() (Colin Ihrig) #32789 * (SEMVER-MINOR) expose host and protocol on ClientRequest (wenningplus) #33803 http2: * (SEMVER-MINOR) return this for Http2ServerRequest#setTimeout (Pranshu Srivastava) #33994 * (SEMVER-MINOR) do not modify explicity set date headers (Pranshu Srivastava) #33160 module: * (SEMVER-MINOR) named exports for CJS via static analysis (Guy Bedford) #35249 * (SEMVER-MINOR) exports pattern support (Guy Bedford) #34718 * (SEMVER-MINOR) package "imports" field (Guy Bedford) #34117 * (SEMVER-MINOR) deprecate module.parent (Antoine du HAMEL) #32217 n-api: * (SEMVER-MINOR) create N-API version 7 (Gabriel Schulhof) #35199 * (SEMVER-MINOR) support type-tagging objects (Gabriel Schulhof) #28237 n-api,src: * (SEMVER-MINOR) provide asynchronous cleanup hooks (Anna Henningsen) #34572 perf_hooks: * (SEMVER-MINOR) add idleTime and event loop util (Trevor Norris) #34938 timers: * (SEMVER-MINOR) allow timers to be used as primitives (Denys Otrishko) #34017 tls: * (SEMVER-MINOR) make 'createSecureContext' honor more options (Mateusz Krawczuk) #33974 worker: * (SEMVER-MINOR) add public method for marking objects as untransferable (Anna Henningsen) #33979 * (SEMVER-MINOR) emit `'messagerror'` events for failed deserialization (Anna Henningsen) #33772 * (SEMVER-MINOR) allow passing JS wrapper objects via postMessage (Anna Henningsen) #33772 * (SEMVER-MINOR) allow transferring/cloning generic BaseObjects (Anna Henningsen) #33772 * (SEMVER-MINOR) add option to track unmanaged file descriptors (Anna Henningsen) #34303 * (SEMVER-MINOR) add stack size resource limit option (Anna Henningsen) #33085 worker,fs: * (SEMVER-MINOR) make FileHandle transferable (Anna Henningsen) #33772 zlib: * (SEMVER-MINOR) add `maxOutputLength` option (unknown) #33516 * switch to lazy init for zlib streams (Andrey Pechkurov) #34048 PR-URL: #35401

Notable changes: assert: * (SEMVER-MINOR) port common.mustCall() to assert (ConorDavenport) nodejs#31982 async_hooks: * (SEMVER-MINOR) add AsyncResource.bind utility (James M Snell) nodejs#34574 buffer: * (SEMVER-MINOR) also alias BigUInt methods (Anna Henningsen) nodejs#34960 * (SEMVER-MINOR) alias UInt ➡️ Uint in buffer methods (Anna Henningsen) nodejs#34729 build: * (SEMVER-MINOR) add build flag for OSS-Fuzz integration (davkor) nodejs#34761 cli: * (SEMVER-MINOR) add alias for report-directory to make it consistent (Ash Cripps) nodejs#33587 crypto: * (SEMVER-MINOR) allow KeyObjects in postMessage (Tobias Nießen) nodejs#33360 * (SEMVER-MINOR) add randomInt function (Oli Lalonde) nodejs#34600 deps: * upgrade to libuv 1.39.0 (Colin Ihrig) nodejs#34915 * upgrade npm to 6.14.7 (claudiahdz) nodejs#34468 * upgrade to libuv 1.38.1 (Colin Ihrig) nodejs#34187 dgram: * (SEMVER-MINOR) add IPv6 scope id suffix to received udp6 dgrams (Pekka Nikander) nodejs#14500 * (SEMVER-MINOR) allow typed arrays in .send() (Sarat Addepalli) nodejs#22413 doc: * (SEMVER-MINOR) Add maxTotalSockets option to agent constructor (rickyes) nodejs#33617 * (SEMVER-MINOR) add basic embedding example documentation (Anna Henningsen) nodejs#30467 * add Ricky Zhou to collaborators (rickyes) nodejs#34676 * add release key for Ruy Adorno (Ruy Adorno) nodejs#34628 * add DerekNonGeneric to collaborators (Derek Lewis) nodejs#34602 * add AshCripps to collaborators (Ash Cripps) nodejs#34494 * add HarshithaKP to collaborators (Harshitha K P) nodejs#34417 * add rexagod to collaborators (Pranshu Srivastava) nodejs#34457 * add release key for Richard Lau (Richard Lau) nodejs#34397 * add danielleadams to collaborators (Danielle Adams) nodejs#34360 * add sxa as collaborator (Stewart X Addison) nodejs#34338 * add ruyadorno to collaborators (Ruy Adorno) nodejs#34297 * (SEMVER-MAJOR) deprecate process.umask() with no arguments (Colin Ihrig) nodejs#32499 embedding: * (SEMVER-MINOR) make Stop() stop Workers (Anna Henningsen) nodejs#32531 * (SEMVER-MINOR) provide hook for custom process.exit() behaviour (Anna Henningsen) nodejs#32531 fs: * (SEMVER-MINOR) implement lutimes (Maël Nison) nodejs#33399 http: * (SEMVER-MINOR) add maxTotalSockets to agent class (rickyes) nodejs#33617 * (SEMVER-MINOR) return this from IncomingMessage#destroy() (Colin Ihrig) nodejs#32789 * (SEMVER-MINOR) expose host and protocol on ClientRequest (wenningplus) nodejs#33803 http2: * (SEMVER-MINOR) return this for Http2ServerRequest#setTimeout (Pranshu Srivastava) nodejs#33994 * (SEMVER-MINOR) do not modify explicity set date headers (Pranshu Srivastava) nodejs#33160 module: * (SEMVER-MINOR) named exports for CJS via static analysis (Guy Bedford) nodejs#35249 * (SEMVER-MINOR) exports pattern support (Guy Bedford) nodejs#34718 * (SEMVER-MINOR) package "imports" field (Guy Bedford) nodejs#34117 * (SEMVER-MINOR) deprecate module.parent (Antoine du HAMEL) nodejs#32217 n-api: * (SEMVER-MINOR) create N-API version 7 (Gabriel Schulhof) nodejs#35199 * (SEMVER-MINOR) support type-tagging objects (Gabriel Schulhof) nodejs#28237 n-api,src: * (SEMVER-MINOR) provide asynchronous cleanup hooks (Anna Henningsen) nodejs#34572 perf_hooks: * (SEMVER-MINOR) add idleTime and event loop util (Trevor Norris) nodejs#34938 timers: * (SEMVER-MINOR) allow timers to be used as primitives (Denys Otrishko) nodejs#34017 tls: * (SEMVER-MINOR) make 'createSecureContext' honor more options (Mateusz Krawczuk) nodejs#33974 worker: * (SEMVER-MINOR) add public method for marking objects as untransferable (Anna Henningsen) nodejs#33979 * (SEMVER-MINOR) emit `'messagerror'` events for failed deserialization (Anna Henningsen) nodejs#33772 * (SEMVER-MINOR) allow passing JS wrapper objects via postMessage (Anna Henningsen) nodejs#33772 * (SEMVER-MINOR) allow transferring/cloning generic BaseObjects (Anna Henningsen) nodejs#33772 * (SEMVER-MINOR) add option to track unmanaged file descriptors (Anna Henningsen) nodejs#34303 * (SEMVER-MINOR) add stack size resource limit option (Anna Henningsen) nodejs#33085 worker,fs: * (SEMVER-MINOR) make FileHandle transferable (Anna Henningsen) nodejs#33772 zlib: * (SEMVER-MINOR) add `maxOutputLength` option (unknown) nodejs#33516 * switch to lazy init for zlib streams (Andrey Pechkurov) nodejs#34048 PR-URL: nodejs#35401

This reverts commit 037ac99. As flaky CI failures have revealed, this feature was implemented incorrectly. `stop_sub_worker_contexts()` needs to be called on the thread on which the `Environment` is currently running, it’s not thread-safe. The current API requires `Stop()` to be thread-safe, though. We could add a new API for this, but unless there’s demand, that’s probably not necessary as `FreeEnvironment()` will also stop Workers, which is commonly the next action on an `Environment` instance after having `Stop()` called on it. Refs: #32531 PR-URL: #32623 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

This adds a regression test for terminating a Worker inside which another Worker is running. PR-URL: #32623 Refs: #32531 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

This reverts commit 037ac99. As flaky CI failures have revealed, this feature was implemented incorrectly. `stop_sub_worker_contexts()` needs to be called on the thread on which the `Environment` is currently running, it’s not thread-safe. The current API requires `Stop()` to be thread-safe, though. We could add a new API for this, but unless there’s demand, that’s probably not necessary as `FreeEnvironment()` will also stop Workers, which is commonly the next action on an `Environment` instance after having `Stop()` called on it. Refs: #32531 PR-URL: #32623 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

This adds a regression test for terminating a Worker inside which another Worker is running. PR-URL: #32623 Refs: #32531 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

addaleax added semver-minor PRs that contain new features and should be released in the next minor version. embedding Issues and PRs related to embedding Node.js in another project. labels Mar 28, 2020

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worker: do not emit 'exit' events during process.exit() #32546

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addaleax added 2 commits April 2, 2020 02:47

embedding: provide hook for custom process.exit() behaviour

e87a6c2

Embedders may not want to terminate the process when `process.exit()` is called. This provides a hook for more flexible handling of that situation. Refs: nodejs#30467 (comment)

embedding: make Stop() stop Workers

03bad86

This makes sense given that terminating execution of the parent thread this way likely also is supposed to stop all running Worker threads spawned by it.

addaleax force-pushed the embed-custom-hook branch from 5c7f563 to 03bad86 Compare April 2, 2020 00:47

addaleax added author ready PRs that have at least one approval, no pending requests for changes, and a CI started. and removed blocked PRs that are blocked by other issues or PRs. labels Apr 2, 2020

joyeecheung mentioned this pull request Jun 8, 2020

src: retrieve binding data from the context #33139

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[v12.x backport] src: improve embedder API #35241

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codebytere mentioned this pull request Sep 28, 2020

v12.19.0 proposal #35401

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embedding: provide hook for custom process.exit() behaviour #32531

embedding: provide hook for custom process.exit() behaviour #32531

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nodejs-github-bot commented Apr 2, 2020

embedding: provide hook for custom process.exit() behaviour #32531

embedding: provide hook for custom process.exit() behaviour #32531

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addaleax commented Mar 28, 2020

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addaleax commented Mar 29, 2020 • edited Loading

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nodejs-github-bot commented Mar 28, 2020 •

edited by addaleax

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