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[v20.x] deps: V8: remove references to non-existent flags #52256

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#49703 cherry-picked a commit from upstream V8 which references some maglev-related flags that are not present in the version of V8 in Node.js 20.


V8 CI on x64 is currently broken, e.g. https://ci.nodejs.org/job/node-test-commit-v8-linux/5892/nodes=benchmark-ubuntu2204-intel-64,v8test=v8test/console

16:38:36 ../../src/flags/flags.cc:590:33: error: no member named 'maglev_deopt_data_on_background' in 'v8::internal::FlagValues'
16:38:36         flag.PointsTo(&v8_flags.maglev_deopt_data_on_background) ||
16:38:36                        ~~~~~~~~ ^
16:38:36 ../../src/flags/flags.cc:591:33: error: no member named 'maglev_build_code_on_background' in 'v8::internal::FlagValues'
16:38:36         flag.PointsTo(&v8_flags.maglev_build_code_on_background) ||
16:38:36                        ~~~~~~~~ ^
16:38:36 2 errors generated.

This comes from #49703 which went out in Node.js 20.8.0 and was presumably missed because the x64 V8 CI has been unreliable due to networking issues on the machine. The V8 CI has been moved onto new x64 machines, which have revealed this compilation failure. (Other release lines successfully compile but are failing perf-related tests.)

Other platforms tested in the V8 CI, Linux on ppc64le and s390x, do not enable maglev so didn't surface this.

This is a fairly naive attempt to fix the compilation failure -- I don't know if there are alternate flags for the version of V8 in Node.js 20 that should be implied by --predictable. cc @joyeecheung

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Review requested:

  • @nodejs/gyp
  • @nodejs/security-wg
  • @nodejs/v8-update

@nodejs-github-bot nodejs-github-bot added build Issues and PRs related to build files or the CI. needs-ci PRs that need a full CI run. v20.x v20.x Issues that can be reproduced on v20.x or PRs targeting the v20.x-staging branch. v8 engine Issues and PRs related to the V8 dependency. labels Mar 28, 2024
@richardlau richardlau added the request-ci Add this label to start a Jenkins CI on a PR. label Mar 28, 2024
@github-actions github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Mar 28, 2024
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This is just to ignore flags implied by —predictable when computing the hash of flags. If the flags are not present it’s safe to just not add code to…ignore rhem.

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nodejs#49703 cherry-picked a commit from
upstream V8 which references some maglev-related flags that are not
present in the version of V8 in Node.js 20.
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Rebased

@richardlau richardlau added the request-ci Add this label to start a Jenkins CI on a PR. label Apr 10, 2024
@github-actions github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Apr 10, 2024
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richardlau added a commit that referenced this pull request Apr 17, 2024
#49703 cherry-picked a commit from
upstream V8 which references some maglev-related flags that are not
present in the version of V8 in Node.js 20.

PR-URL: #52256
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
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richardlau commented Apr 17, 2024

Landed in ecadd63.

@richardlau richardlau closed this Apr 17, 2024
@richardlau richardlau deleted the maglevflags branch April 17, 2024 11:54
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