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fix(toolkit): RWLock.acquireRead is not re-entrant #24702

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merged 2 commits into from
Mar 20, 2023

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If multiple threads of the same process attempt to acquire the same reader lock, the a race condition occurs, and the first thread to release the reader lock will release ALL the locks.

Introduce a counter so that each acquire attempt uses a different file name, ensuring that the read lock is reentrant.


By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license

If multiple threads of the same process attempt to acquire the same
reader lock, the a race condition occurs, and the first thread to
release the reader lock will release ALL the locks.

Introduce a counter so that each acquire attempt uses a different file
name, ensuring that the read lock is reentrant.
@RomainMuller RomainMuller added the pr-linter/exempt-test The PR linter will not require test changes label Mar 20, 2023
@github-actions github-actions bot added the p2 label Mar 20, 2023
@aws-cdk-automation aws-cdk-automation requested a review from a team March 20, 2023 14:48
@mergify mergify bot added the contribution/core This is a PR that came from AWS. label Mar 20, 2023
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The pull request linter has failed. See the aws-cdk-automation comment below for failure reasons. If you believe this pull request should receive an exemption, please comment and provide a justification.

A comment requesting an exemption should contain the text Exemption Request. Additionally, if clarification is needed add Clarification Request to a comment.

@aws-cdk-automation aws-cdk-automation added the pr/needs-cli-test-run This PR needs CLI tests run against it. label Mar 20, 2023
packages/aws-cdk/lib/api/util/rwlock.ts Outdated Show resolved Hide resolved
@RomainMuller RomainMuller added the pr-linter/exempt-integ-test The PR linter will not require integ test changes label Mar 20, 2023
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AWS CodeBuild CI Report

  • CodeBuild project: AutoBuildv2Project1C6BFA3F-wQm2hXv2jqQv
  • Commit ID: f5aa54a
  • Result: SUCCEEDED
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@RomainMuller RomainMuller added the pr-linter/cli-integ-tested Assert that any CLI changes have been integ tested label Mar 20, 2023
@aws-cdk-automation aws-cdk-automation dismissed their stale review March 20, 2023 17:17

✅ Updated pull request passes all PRLinter validations. Dissmissing previous PRLinter review.

@aws-cdk-automation aws-cdk-automation removed the pr/needs-cli-test-run This PR needs CLI tests run against it. label Mar 20, 2023
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mergify bot commented Mar 20, 2023

Thank you for contributing! Your pull request will be updated from main and then merged automatically (do not update manually, and be sure to allow changes to be pushed to your fork).

@mergify mergify bot merged commit 3b7431b into main Mar 20, 2023
@mergify mergify bot deleted the rmuller/rw-lock-read-reentrant branch March 20, 2023 17:21
homakk pushed a commit to homakk/aws-cdk that referenced this pull request Mar 28, 2023
If multiple threads of the same process attempt to acquire the same reader lock, the a race condition occurs, and the first thread to release the reader lock will release ALL the locks.

Introduce a counter so that each acquire attempt uses a different file name, ensuring that the read lock is reentrant.

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
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3 participants