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[v10.x] domain: avoid circular memory references #27749

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[v10.x] domain: avoid circular memory references #27749

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MylesBorins
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@MylesBorins MylesBorins commented May 17, 2019 •
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Backport of #25993

addaleax added 2 commits May 17, 2019 11:39
@addaleax @MylesBorins
src: add WeakReference utility
19fd3a0 
Add a simple `WeakReference` utility that we can use until the
language provides something on its own.

PR-URL: nodejs#25993
Fixes: nodejs#23862
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Vladimir de Turckheim <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
@addaleax @MylesBorins
domain: avoid circular memory references
5f65db2 
Avoid circular references that the JS engine cannot see through
because it involves an `async id` ⇒ `domain` link.

Using weak references is not a great solution, because it increases
the domain module’s dependency on internals and the added calls into
C++ may affect performance, but it seems like the least bad one.

PR-URL: nodejs#25993
Fixes: nodejs#23862
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Vladimir de Turckheim <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
@MylesBorins MylesBorins requested review from danbev and addaleax May 17, 2019 15:45
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Lite-CI: https://ci.nodejs.org/job/node-test-pull-request-lite-pipeline/3550

@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. domain Issues and PRs related to the domain subsystem. util Issues and PRs related to the built-in util module. v10.x labels May 17, 2019
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CI: https://ci.nodejs.org/job/node-test-pull-request/23162/

This was referenced May 17, 2019
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CI: https://ci.nodejs.org/job/node-test-pull-request/23163/

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CI: https://ci.nodejs.org/job/node-test-pull-request/23164/

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hmmm...

looks like we are getting a consistent failure on windows

assert.js:84
  throw new AssertionError(obj);
  ^

AssertionError [ERR_ASSERTION]: Input A expected to strictly equal input B:
+ expected - actual

- 'EAI_FAIL'
+ 'ENOTFOUND'
    at Socket.<anonymous> (c:\workspace\node-test-binary-windows\test\parallel\test-net-dns-error.js:37:10)
    at Socket.<anonymous> (c:\workspace\node-test-binary-windows\test\common\index.js:379:15)
    at Socket.emit (events.js:198:13)
    at GetAddrInfoReqWrap.emitLookup [as callback] (net.js:1004:12)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:56:17)

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CI: https://ci.nodejs.org/job/node-test-pull-request/23211/

MylesBorins pushed a commit that referenced this pull request May 20, 2019
@addaleax @MylesBorins
src: add WeakReference utility
b9ea23c 
Add a simple `WeakReference` utility that we can use until the
language provides something on its own.

Backport-PR-URL: #27749
PR-URL: #25993
Fixes: #23862
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Vladimir de Turckheim <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
MylesBorins pushed a commit that referenced this pull request May 20, 2019
@addaleax @MylesBorins
domain: avoid circular memory references
25d73aa 
Avoid circular references that the JS engine cannot see through
because it involves an `async id` ⇒ `domain` link.

Using weak references is not a great solution, because it increases
the domain module’s dependency on internals and the added calls into
C++ may affect performance, but it seems like the least bad one.

Backport-PR-URL: #27749
PR-URL: #25993
Fixes: #23862
Reviewed-By: Matteo Collina <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: Сковорода Никита Андреевич <[email protected]>
Reviewed-By: Vladimir de Turckheim <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
@MylesBorins
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landed in 25d73aa...ec02117

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@addaleax addaleax addaleax approved these changes

@danbev danbev Awaiting requested review from danbev

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