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[v18.x] src: per-realm binding data #47174

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legendecas
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Binding data is inherited from BaseObject and created in a specific realm. They need to be tracked on a per-realm basis so that they can be released properly when a realm is disposed.

PR-URL: #46556
Reviewed-By: Joyee Cheung joyeec9h3@gmail.com
Reviewed-By: Colin Ihrig cjihrig@gmail.com
Reviewed-By: Matteo Collina matteo.collina@gmail.com

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Review requested:

  • @nodejs/http
  • @nodejs/http2
  • @nodejs/net
  • @nodejs/startup

@legendecas legendecas changed the title src: per-realm binding data [v18.x] src: per-realm binding data Mar 20, 2023
@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. v18.x Issues that can be reproduced on v18.x or PRs targeting the v18.x-staging branch. labels Mar 20, 2023
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RSLGTM

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@mcollina mcollina left a comment

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lgtm

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@danielleadams
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@legendecas are you able to restart the ASan test to confirm it passes before landing in v18? Thanks!

Binding data is inherited from BaseObject and created in a specific
realm. They need to be tracked on a per-realm basis so that they can
be released properly when a realm is disposed.

PR-URL: nodejs#46556
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
# Conflicts:
#	src/dataqueue/queue.cc
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Seems like I can not restart the ASan action either. I've rebased the branch on the tip of v18.x-staging.

@mcollina mcollina added the request-ci Add this label to start a Jenkins CI on a PR. label May 19, 2023
@github-actions github-actions bot removed the request-ci Add this label to start a Jenkins CI on a PR. label May 19, 2023
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Landed in 0b92035

danielleadams pushed a commit that referenced this pull request May 29, 2023
Binding data is inherited from BaseObject and created in a specific
realm. They need to be tracked on a per-realm basis so that they can
be released properly when a realm is disposed.

PR-URL: #46556
Backport-PR-URL: #47174
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
# Conflicts:
#	src/dataqueue/queue.cc
@legendecas legendecas deleted the backport-46556-to-18 branch May 29, 2023 02:29
@@ -539,7 +539,8 @@ void Environment::AssignToContext(Local<v8::Context> context,
context->SetAlignedPointerInEmbedderData(ContextEmbedderIndex::kRealm, realm);
// Used to retrieve bindings
context->SetAlignedPointerInEmbedderData(
ContextEmbedderIndex::kBindingListIndex, &(this->bindings_));
ContextEmbedderIndex::kBindingDataStoreIndex,
realm->binding_data_store());
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This function is called from node_contextify.cc like this:

env->AssignToContext(v8_context, nullptr, info);

This appears to get an invalid value in that flow. What's the expected behavior? Should the embedder data be nullptr when realm is nullptr?

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@jkrems jkrems Jul 16, 2023

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I haven't fully looked into how this slot is used but I suspect the fix is:

  // Used to retrieve bindings
  context->SetAlignedPointerInEmbedderData(
      ContextEmbedderIndex::kBindingDataStoreIndex,
      realm != nullptr ? realm->binding_data_store() : nullptr);

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Sending #48802 in case that is the fix.

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7 participants