v8: add v8.startupSnapshot utils by joyeecheung · Pull Request #43329 · nodejs/node · GitHub

This adds several APIs under the v8.startupSnapshot namespace
for specifying hooks into the startup snapshot serialization
and deserialization.

isBuildingSnapshot()
addSerializeCallback()
addDeserializeCallback()
setDeserializeMainFunction()

Example snapshot entry point that reads a file from disk, compresses it with gzip and makes it
part of the serialized heap so that the deserialized instance can decompress and log the
content of the file after startup:

'use strict';

const fs = require('fs');
const zlib = require('zlib');
const path = require('path');
const assert = require('assert');

const {
  isBuildingSnapshot,
  addSerializeCallback,
  addDeserializeCallback,
  setDeserializeMainFunction
} = require('v8').startupSnapshot;

const filePath = path.resolve(__dirname, '../x1024.txt');
const storage = {};

assert(isBuildingSnapshot());

addSerializeCallback(({ filePath }) => {
  console.error('serializing', filePath);
  storage[filePath] = zlib.gzipSync(fs.readFileSync(filePath));
}, { filePath });

addDeserializeCallback(({ filePath }) => {
  console.error('deserializing', filePath);
  storage[filePath] = zlib.gunzipSync(storage[filePath]);
}, { filePath });

setDeserializeMainFunction(({ filePath }) => {
  console.log(storage[filePath].toString());
}, { filePath });

Fixes: #42617
Refs: #35711

Review requested:

@nodejs/startup

CI: https://ci.nodejs.org/job/node-test-pull-request/44390/

This adds several APIs under the `v8.startupSnapshot` namespace for specifying hooks into the startup snapshot serialization and deserialization. - isBuildingSnapshot() - addSerializeCallback() - addDeserializeCallback() - setDeserializeMainFunction()

CI: https://ci.nodejs.org/job/node-test-pull-request/44419/

CI: https://ci.nodejs.org/job/node-test-pull-request/44481/

Removed the unused isolate which is breaking a build and updated the example a bit to assert isBuildingSnapshot for clarity.

CI: https://ci.nodejs.org/job/node-test-pull-request/44488/

CI: https://ci.nodejs.org/job/node-test-pull-request/44580/

CI: https://ci.nodejs.org/job/node-test-pull-request/44587/

CI: https://ci.nodejs.org/job/node-test-pull-request/44631/

This adds several APIs under the `v8.startupSnapshot` namespace for specifying hooks into the startup snapshot serialization and deserialization. - isBuildingSnapshot() - addSerializeCallback() - addDeserializeCallback() - setDeserializeMainFunction() PR-URL: #43329 Fixes: #42617 Refs: #35711 Reviewed-By: Chengzhong Wu <legendecas@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>

Landed in a36a546

This adds several APIs under the `v8.startupSnapshot` namespace for specifying hooks into the startup snapshot serialization and deserialization. - isBuildingSnapshot() - addSerializeCallback() - addDeserializeCallback() - setDeserializeMainFunction() PR-URL: #43329 Fixes: #42617 Refs: #35711 Reviewed-By: Chengzhong Wu <legendecas@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>

Notable changes: Adds `util.parseArgs` helper for higher level command-line argument parsing. Contributed by Benjamin Coe, John Gee, Darcy Clarke, Joe Sepi, Kevin Gibbons, Aaron Casanova, Jessica Nahulan, and Jordan Harband. #42675 Node.js ESM Loader hooks now support multiple custom loaders, and composition is achieved via "chaining": `foo-loader` calls `bar-loader` calls `qux-loader` (a custom loader _must_ now signal a short circuit when intentionally not calling the next). See the ESM docs (https://nodejs.org/dist/latest-v16.x/docs/api/esm.html) for details. Contributed by Jacob Smith, Geoffrey Booth, and Bradley Farias. #42623 The `node:test` module, which was initially introduced in Node.js v18.0.0, is now available with all the changes done to it up to Node.js v18.7.0. To better align Node.js' experimental implementation of the Web Crypto API with other runtimes, several changes were made: * Support for CFRG curves was added, with the `'Ed25519'`, `'Ed448'`, `'X25519'`, and `'X448'` algorithms. * The proprietary `'NODE-DSA'`, `'NODE-DH'`, `'NODE-SCRYPT'`, `'NODE-ED25519'`, `'NODE-ED448'`, `'NODE-X25519'`, and `'NODE-X448'` algorithms were removed. * The proprietary `'node.keyObject'` import/export format was removed. Contributed by Filip Skokan. #42507 #43310 Updated Corepack to 0.12.1 - #43965 Updated ICU to 71.1 - #42655 Updated npm to 8.15.0 - #43917 Updated Undici to 5.8.0 - #43886 (SEMVER-MINOR) crypto: make authTagLength optional for CC20P1305 (Tobias Nießen) [#42427](#42427) (SEMVER-MINOR) crypto: align webcrypto RSA key import/export with other implementations (Filip Skokan) [#42816](#42816) (SEMVER-MINOR) dns: export error code constants from `dns/promises` (Feng Yu) [#43176](#43176) doc: deprecate ercion to integer in process.exit (Daeyeon Jeong) [#43738](#43738) (SEMVER-MINOR) doc: deprecate diagnostics\_channel object subscribe method (Stephen Belanger) [#42714](#42714) (SEMVER-MINOR) errors: add support for cause in aborterror (James M Snell) [#41008](#41008) (SEMVER-MINOR) events: expose CustomEvent on global with CLI flag (Daeyeon Jeong) [#43885](#43885) (SEMVER-MINOR) events: add `CustomEvent` (Daeyeon Jeong) [#43514](#43514) (SEMVER-MINOR) events: propagate abortsignal reason in new AbortError ctor in events (James M Snell) [#41008](#41008) (SEMVER-MINOR) fs: propagate abortsignal reason in new AbortSignal constructors (James M Snell) [#41008](#41008) (SEMVER-MINOR) fs: make params in writing methods optional (LiviaMedeiros) [#42601](#42601) (SEMVER-MINOR) fs: add `read(buffer[, options])` versions (LiviaMedeiros) [#42768](#42768) (SEMVER-MINOR) http: add drop request event for http server (theanarkh) [#43806](#43806) (SEMVER-MINOR) http: add diagnostics channel for http client (theanarkh) [#43580](#43580) (SEMVER-MINOR) http: add perf\_hooks detail for http request and client (theanarkh) [#43361](#43361) (SEMVER-MINOR) http: add uniqueHeaders option to request and createServer (Paolo Insogna) [#41397](#41397) (SEMVER-MINOR) http2: propagate abortsignal reason in new AbortError constructor (James M Snell) [#41008](#41008) (SEMVER-MINOR) http2: compat support for array headers (OneNail) [#42901](#42901) (SEMVER-MINOR) lib: propagate abortsignal reason in new AbortError constructor in blob (James M Snell) [#41008](#41008) (SEMVER-MINOR) lib: add abortSignal.throwIfAborted() (James M Snell) [#40951](#40951) (SEMVER-MINOR) lib: improved diagnostics\_channel subscribe/unsubscribe (Stephen Belanger) [#42714](#42714) (SEMVER-MINOR) module: add isBuiltIn method (hemanth.hm) [#43396](#43396) (SEMVER-MINOR) moduleepl**: support 'node:'-only core modules (Colin Ihrig) [#42325](#42325) (SEMVER-MINOR) net: add drop event for net server (theanarkh) [#43582](#43582) (SEMVER-MINOR) net: add ability to reset a tcp socket (pupilTong) [#43112](#43112) (SEMVER-MINOR) nodepi**: emit uncaught-exception on unhandled tsfn callbacks (Chengzhong Wu) [#36510](#36510) (SEMVER-MINOR) perfhooks**: add PerformanceResourceTiming (RafaelGSS) [#42725](#42725) (SEMVER-MINOR) report: add more heap infos in process report (theanarkh) [#43116](#43116) (SEMVER-MINOR) src: add --openssl-legacy-provider option (Daniel Bevenius) [#40478](#40478) (SEMVER-MINOR) src: define fs.constants.S\_IWUSR & S\_IRUSR for Win (Liviu Ionescu) [#42757](#42757) (SEMVER-MINOR) srcoc,test**: add --openssl-shared-config option (Daniel Bevenius) [#43124](#43124) (SEMVER-MINOR) stream: use cause options in AbortError constructors (James M Snell) [#41008](#41008) (SEMVER-MINOR) stream: add iterator helper find (Nitzan Uziely) [#41849](#41849) (SEMVER-MINOR) stream: add writableAborted (Robert Nagy) [#40802](#40802) (SEMVER-MINOR) timers: propagate signal.reason in awaitable timers (James M Snell) [#41008](#41008) (SEMVER-MINOR) v8: add v8.startupSnapshot utils (Joyee Cheung) [#43329](#43329) (SEMVER-MINOR) v8: export more fields in getHeapStatistics (theanarkh) [#42784](#42784) (SEMVER-MINOR) worker: add hasRef() to MessagePort (Darshan Sen) [#42849](#42849) PR-URL: #44098

Notable changes: Adds `util.parseArgs` helper for higher level command-line argument parsing. Contributed by Benjamin Coe, John Gee, Darcy Clarke, Joe Sepi, Kevin Gibbons, Aaron Casanova, Jessica Nahulan, and Jordan Harband. #42675 Node.js ESM Loader hooks now support multiple custom loaders, and composition is achieved via "chaining": `foo-loader` calls `bar-loader` calls `qux-loader` (a custom loader _must_ now signal a short circuit when intentionally not calling the next). See the ESM docs (https://nodejs.org/dist/latest-v16.x/docs/api/esm.html) for details. Contributed by Jacob Smith, Geoffrey Booth, and Bradley Farias. #42623 The `node:test` module, which was initially introduced in Node.js v18.0.0, is now available with all the changes done to it up to Node.js v18.7.0. To better align Node.js' experimental implementation of the Web Crypto API with other runtimes, several changes were made: * Support for CFRG curves was added, with the `'Ed25519'`, `'Ed448'`, `'X25519'`, and `'X448'` algorithms. * The proprietary `'NODE-DSA'`, `'NODE-DH'`, `'NODE-SCRYPT'`, `'NODE-ED25519'`, `'NODE-ED448'`, `'NODE-X25519'`, and `'NODE-X448'` algorithms were removed. * The proprietary `'node.keyObject'` import/export format was removed. Contributed by Filip Skokan. #42507 #43310 Updated Corepack to 0.12.1 - #43965 Updated ICU to 71.1 - #42655 Updated npm to 8.15.0 - #43917 Updated Undici to 5.8.0 - #43886 (SEMVER-MINOR) crypto: make authTagLength optional for CC20P1305 (Tobias Nießen) #42427 (SEMVER-MINOR) crypto: align webcrypto RSA key import/export with other implementations (Filip Skokan) #42816 (SEMVER-MINOR) dns: export error code constants from `dns/promises` (Feng Yu) #43176 doc: deprecate coercion to integer in process.exit (Daeyeon Jeong) #43738 (SEMVER-MINOR) doc: deprecate diagnostics_channel object subscribe method (Stephen Belanger) #42714 (SEMVER-MINOR) errors: add support for cause in aborterror (James M Snell) #41008 (SEMVER-MINOR) events: expose CustomEvent on global with CLI flag (Daeyeon Jeong) #43885 (SEMVER-MINOR) events: add `CustomEvent` (Daeyeon Jeong) #43514 (SEMVER-MINOR) events: propagate abortsignal reason in new AbortError ctor in events (James M Snell) #41008 (SEMVER-MINOR) fs: propagate abortsignal reason in new AbortSignal constructors (James M Snell) #41008 (SEMVER-MINOR) fs: make params in writing methods optional (LiviaMedeiros) #42601 (SEMVER-MINOR) fs: add `read(buffer[, options])` versions (LiviaMedeiros) #42768 (SEMVER-MINOR) http: add drop request event for http server (theanarkh) #43806 (SEMVER-MINOR) http: add diagnostics channel for http client (theanarkh) #43580 (SEMVER-MINOR) http: add perf_hooks detail for http request and client (theanarkh) #43361 (SEMVER-MINOR) http: add uniqueHeaders option to request and createServer (Paolo Insogna) #41397 (SEMVER-MINOR) http2: propagate abortsignal reason in new AbortError constructor (James M Snell) #41008 (SEMVER-MINOR) http2: compat support for array headers (OneNail) #42901 (SEMVER-MINOR) lib: propagate abortsignal reason in new AbortError constructor in blob (James M Snell) #41008 (SEMVER-MINOR) lib: add abortSignal.throwIfAborted() (James M Snell) #40951 (SEMVER-MINOR) lib: improved diagnostics_channel subscribe/unsubscribe (Stephen Belanger) #42714 (SEMVER-MINOR) module: add isBuiltIn method (hemanth.hm) #43396 (SEMVER-MINOR) module,repl: support 'node:'-only core modules (Colin Ihrig) #42325 (SEMVER-MINOR) net: add drop event for net server (theanarkh) #43582 (SEMVER-MINOR) net: add ability to reset a tcp socket (pupilTong) #43112 (SEMVER-MINOR) node-api: emit uncaught-exception on unhandled tsfn callbacks (Chengzhong Wu) #36510 (SEMVER-MINOR) perf_hooks: add PerformanceResourceTiming (RafaelGSS) #42725 (SEMVER-MINOR) report: add more heap infos in process report (theanarkh) #43116 (SEMVER-MINOR) src: add --openssl-legacy-provider option (Daniel Bevenius) #40478 (SEMVER-MINOR) src: define fs.constants.S_IWUSR & S_IRUSR for Win (Liviu Ionescu) #42757 (SEMVER-MINOR) src,doc,test: add --openssl-shared-config option (Daniel Bevenius) #43124 (SEMVER-MINOR) stream: use cause options in AbortError constructors (James M Snell) #41008 (SEMVER-MINOR) stream: add iterator helper find (Nitzan Uziely) #41849 (SEMVER-MINOR) stream: add writableAborted (Robert Nagy) #40802 (SEMVER-MINOR) timers: propagate signal.reason in awaitable timers (James M Snell) #41008 (SEMVER-MINOR) v8: add v8.startupSnapshot utils (Joyee Cheung) #43329 (SEMVER-MINOR) v8: export more fields in getHeapStatistics (theanarkh) #42784 (SEMVER-MINOR) worker: add hasRef() to MessagePort (Darshan Sen) #42849 PR-URL: #44098

This adds several APIs under the `v8.startupSnapshot` namespace for specifying hooks into the startup snapshot serialization and deserialization. - isBuildingSnapshot() - addSerializeCallback() - addDeserializeCallback() - setDeserializeMainFunction() PR-URL: nodejs/node#43329 Fixes: nodejs/node#42617 Refs: nodejs/node#35711 Reviewed-By: Chengzhong Wu <legendecas@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>

Notable changes: Adds `util.parseArgs` helper for higher level command-line argument parsing. Contributed by Benjamin Coe, John Gee, Darcy Clarke, Joe Sepi, Kevin Gibbons, Aaron Casanova, Jessica Nahulan, and Jordan Harband. nodejs/node#42675 Node.js ESM Loader hooks now support multiple custom loaders, and composition is achieved via "chaining": `foo-loader` calls `bar-loader` calls `qux-loader` (a custom loader _must_ now signal a short circuit when intentionally not calling the next). See the ESM docs (https://nodejs.org/dist/latest-v16.x/docs/api/esm.html) for details. Contributed by Jacob Smith, Geoffrey Booth, and Bradley Farias. nodejs/node#42623 The `node:test` module, which was initially introduced in Node.js v18.0.0, is now available with all the changes done to it up to Node.js v18.7.0. To better align Node.js' experimental implementation of the Web Crypto API with other runtimes, several changes were made: * Support for CFRG curves was added, with the `'Ed25519'`, `'Ed448'`, `'X25519'`, and `'X448'` algorithms. * The proprietary `'NODE-DSA'`, `'NODE-DH'`, `'NODE-SCRYPT'`, `'NODE-ED25519'`, `'NODE-ED448'`, `'NODE-X25519'`, and `'NODE-X448'` algorithms were removed. * The proprietary `'node.keyObject'` import/export format was removed. Contributed by Filip Skokan. nodejs/node#42507 nodejs/node#43310 Updated Corepack to 0.12.1 - nodejs/node#43965 Updated ICU to 71.1 - nodejs/node#42655 Updated npm to 8.15.0 - nodejs/node#43917 Updated Undici to 5.8.0 - nodejs/node#43886 (SEMVER-MINOR) crypto: make authTagLength optional for CC20P1305 (Tobias Nießen) nodejs/node#42427 (SEMVER-MINOR) crypto: align webcrypto RSA key import/export with other implementations (Filip Skokan) nodejs/node#42816 (SEMVER-MINOR) dns: export error code constants from `dns/promises` (Feng Yu) nodejs/node#43176 doc: deprecate coercion to integer in process.exit (Daeyeon Jeong) nodejs/node#43738 (SEMVER-MINOR) doc: deprecate diagnostics_channel object subscribe method (Stephen Belanger) nodejs/node#42714 (SEMVER-MINOR) errors: add support for cause in aborterror (James M Snell) nodejs/node#41008 (SEMVER-MINOR) events: expose CustomEvent on global with CLI flag (Daeyeon Jeong) nodejs/node#43885 (SEMVER-MINOR) events: add `CustomEvent` (Daeyeon Jeong) nodejs/node#43514 (SEMVER-MINOR) events: propagate abortsignal reason in new AbortError ctor in events (James M Snell) nodejs/node#41008 (SEMVER-MINOR) fs: propagate abortsignal reason in new AbortSignal constructors (James M Snell) nodejs/node#41008 (SEMVER-MINOR) fs: make params in writing methods optional (LiviaMedeiros) nodejs/node#42601 (SEMVER-MINOR) fs: add `read(buffer[, options])` versions (LiviaMedeiros) nodejs/node#42768 (SEMVER-MINOR) http: add drop request event for http server (theanarkh) nodejs/node#43806 (SEMVER-MINOR) http: add diagnostics channel for http client (theanarkh) nodejs/node#43580 (SEMVER-MINOR) http: add perf_hooks detail for http request and client (theanarkh) nodejs/node#43361 (SEMVER-MINOR) http: add uniqueHeaders option to request and createServer (Paolo Insogna) nodejs/node#41397 (SEMVER-MINOR) http2: propagate abortsignal reason in new AbortError constructor (James M Snell) nodejs/node#41008 (SEMVER-MINOR) http2: compat support for array headers (OneNail) nodejs/node#42901 (SEMVER-MINOR) lib: propagate abortsignal reason in new AbortError constructor in blob (James M Snell) nodejs/node#41008 (SEMVER-MINOR) lib: add abortSignal.throwIfAborted() (James M Snell) nodejs/node#40951 (SEMVER-MINOR) lib: improved diagnostics_channel subscribe/unsubscribe (Stephen Belanger) nodejs/node#42714 (SEMVER-MINOR) module: add isBuiltIn method (hemanth.hm) nodejs/node#43396 (SEMVER-MINOR) module,repl: support 'node:'-only core modules (Colin Ihrig) nodejs/node#42325 (SEMVER-MINOR) net: add drop event for net server (theanarkh) nodejs/node#43582 (SEMVER-MINOR) net: add ability to reset a tcp socket (pupilTong) nodejs/node#43112 (SEMVER-MINOR) node-api: emit uncaught-exception on unhandled tsfn callbacks (Chengzhong Wu) nodejs/node#36510 (SEMVER-MINOR) perf_hooks: add PerformanceResourceTiming (RafaelGSS) nodejs/node#42725 (SEMVER-MINOR) report: add more heap infos in process report (theanarkh) nodejs/node#43116 (SEMVER-MINOR) src: add --openssl-legacy-provider option (Daniel Bevenius) nodejs/node#40478 (SEMVER-MINOR) src: define fs.constants.S_IWUSR & S_IRUSR for Win (Liviu Ionescu) nodejs/node#42757 (SEMVER-MINOR) src,doc,test: add --openssl-shared-config option (Daniel Bevenius) nodejs/node#43124 (SEMVER-MINOR) stream: use cause options in AbortError constructors (James M Snell) nodejs/node#41008 (SEMVER-MINOR) stream: add iterator helper find (Nitzan Uziely) nodejs/node#41849 (SEMVER-MINOR) stream: add writableAborted (Robert Nagy) nodejs/node#40802 (SEMVER-MINOR) timers: propagate signal.reason in awaitable timers (James M Snell) nodejs/node#41008 (SEMVER-MINOR) v8: add v8.startupSnapshot utils (Joyee Cheung) nodejs/node#43329 (SEMVER-MINOR) v8: export more fields in getHeapStatistics (theanarkh) nodejs/node#42784 (SEMVER-MINOR) worker: add hasRef() to MessagePort (Darshan Sen) nodejs/node#42849 PR-URL: nodejs/node#44098

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This adds several APIs under the `v8.startupSnapshot` namespace for specifying hooks into the startup snapshot serialization and deserialization. - isBuildingSnapshot() - addSerializeCallback() - addDeserializeCallback() - setDeserializeMainFunction()

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