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src: distinguish env stopping flags #45907

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merged 1 commit into from Jan 14, 2023

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legendecas
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@legendecas legendecas commented Dec 19, 2022

Currently, !env->can_call_into_js() and env->is_stopping() have different semantics by their names. The is_stopping() flag implies !env->can_call_into_js().

However, this implication is not enforced in Environment::FreeEnvironment. Environment::FreeEnvironment creates a DisallowJavascriptExecutionScope, the flag Environment::can_call_into_js() needs to be set as false.

As Environment::can_call_into_js_ is a simple boolean flag, it should not be accessed off-thread. This also fixes an issue that the flag Environment::can_call_into_js_ is been modified in Environment::ExitEnv, which may be called from other threads.

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Review requested:

  • @nodejs/http2
  • @nodejs/modules
  • @nodejs/net
  • @nodejs/vm

@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. lib / src Issues and PRs related to general changes in the lib or src directory. needs-ci PRs that need a full CI run. labels Dec 19, 2022
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`Environment::FreeEnvironment` creates a
`DisallowJavascriptExecutionScope`, so the flag
`Environment::can_call_into_js()` should also be set as `false`. As
`Environment::can_call_into_js_` is a simple boolean flag, it should not
be accessed off-threads.
@legendecas legendecas added the request-ci Add this label to start a Jenkins CI on a PR. label Jan 8, 2023
@github-actions github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label Jan 8, 2023
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I've spent a bit of time trying to figure out those lines of code.

I'd be more comfortable with an added test for this change, but I agree it might be very hard to check.

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@mcollina mcollina added commit-queue Add this label to land a pull request using GitHub Actions. and removed needs-ci PRs that need a full CI run. labels Jan 14, 2023
@nodejs-github-bot nodejs-github-bot removed the commit-queue Add this label to land a pull request using GitHub Actions. label Jan 14, 2023
@nodejs-github-bot nodejs-github-bot merged commit bb40507 into nodejs:main Jan 14, 2023
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Landed in bb40507

RafaelGSS pushed a commit to RafaelGSS/node that referenced this pull request Jan 17, 2023
`Environment::FreeEnvironment` creates a
`DisallowJavascriptExecutionScope`, so the flag
`Environment::can_call_into_js()` should also be set as `false`. As
`Environment::can_call_into_js_` is a simple boolean flag, it should not
be accessed off-threads.

PR-URL: nodejs#45907
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
RafaelGSS pushed a commit that referenced this pull request Jan 20, 2023
`Environment::FreeEnvironment` creates a
`DisallowJavascriptExecutionScope`, so the flag
`Environment::can_call_into_js()` should also be set as `false`. As
`Environment::can_call_into_js_` is a simple boolean flag, it should not
be accessed off-threads.

PR-URL: #45907
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
@RafaelGSS RafaelGSS mentioned this pull request Jan 20, 2023
juanarbol pushed a commit that referenced this pull request Jan 26, 2023
`Environment::FreeEnvironment` creates a
`DisallowJavascriptExecutionScope`, so the flag
`Environment::can_call_into_js()` should also be set as `false`. As
`Environment::can_call_into_js_` is a simple boolean flag, it should not
be accessed off-threads.

PR-URL: #45907
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
@juanarbol juanarbol mentioned this pull request Jan 28, 2023
juanarbol pushed a commit that referenced this pull request Jan 31, 2023
`Environment::FreeEnvironment` creates a
`DisallowJavascriptExecutionScope`, so the flag
`Environment::can_call_into_js()` should also be set as `false`. As
`Environment::can_call_into_js_` is a simple boolean flag, it should not
be accessed off-threads.

PR-URL: #45907
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
@bcoe bcoe mentioned this pull request Dec 18, 2023
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4 participants