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contextify: tie lifetimes of context & sandbox #5786

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Pull Request check-list

  • Does make -j8 test (UNIX) or vcbuild test nosign (Windows) pass with
    this change (including linting)?
  • Is the commit message formatted according to [CONTRIBUTING.md][0]?
  • If this change fixes a bug (or a performance problem), is a regression
    test (or a benchmark) included?

Affected core subsystem(s)

contextify

Description of change

When the previous set of changes (bfff07b) it was possible to have the
context get garbage collected while sandbox was still live. We need to
tie the lifetime of the context to the lifetime of the sandbox.

Fixes: #5768
R=@bnoordhuis
/cc @evanlucas @cjihrig

Note that this is not trivially back-portable to 5.x. SetPrivate doesn't exist on 5.x, but I can create a new PR once this lands on master. This does continue to address the memory growth issue reported in #3113, but we should get this vetted before backporting.

CI: https://ci.nodejs.org/job/node-test-pull-request/1960/

@mscdex mscdex added c++ Issues and PRs that require attention from people who are familiar with C++. vm Issues and PRs related to the vm subsystem. labels Mar 18, 2016
@MylesBorins
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@ofrobots since this will take time to backport to v5.x do you think we should be keeping #5782 open and cutting a v5.9.1 with the changes reverted?

@jasnell
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jasnell commented Mar 18, 2016

LGTM

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@cjihrig
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cjihrig commented Mar 18, 2016

LGTM

@ofrobots
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I want to avoid a deeper hole, specially that this is going to be a Friday release. If bugs in this code still remain, they are going to be gc (i.e. timing) related. I think it would be best to proceed with a revert (i.e. #5782) and allow in depth review on this PR.

@Knighton910
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+1

@@ -1,3 +1,4 @@
// Flags: --expose-gc
'use strict';
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nit: other two locations where --expose-gc is used the comment is placed directly after the 'use strict';.

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Done.

When the previous set of changes (bfff07b) it was possible to have the
context get garbage collected while sandbox was still live. We need to
tie the lifetime of the context to the lifetime of the sandbox.

Fixes: nodejs#5768
PR-URL: nodejs#5786
@trevnorris
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LGTM

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@bnoordhuis
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LGTM

ofrobots added a commit to ofrobots/node that referenced this pull request Mar 19, 2016
When the previous set of changes (bfff07b) it was possible to have the
context get garbage collected while sandbox was still live. We need to
tie the lifetime of the context to the lifetime of the sandbox.

This is a backport of nodejs#5786 to v5.x.

Ref: nodejs#5786
@ofrobots ofrobots mentioned this pull request Mar 19, 2016
3 tasks
ofrobots added a commit that referenced this pull request Mar 19, 2016
When the previous set of changes (bfff07b) it was possible to have the
context get garbage collected while sandbox was still live. We need to
tie the lifetime of the context to the lifetime of the sandbox.

Fixes: #5768
PR-URL: #5786
Reviewed-By: jasnell - James M Snell <[email protected]>
Reviewed-By: cjihrig - Colin Ihrig <[email protected]>
Reviewed-By: trevnorris - Trevor Norris <[email protected]>
Reviewed-By: bnoordhuis - Ben Noordhuis <[email protected]>
@ofrobots
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Thanks. Landed in a53b2ac. PR for backport to v5.x is here: #5800.

@ofrobots ofrobots closed this Mar 19, 2016
MylesBorins pushed a commit that referenced this pull request Mar 21, 2016
When the previous set of changes (bfff07b) it was possible to have the
context get garbage collected while sandbox was still live. We need to
tie the lifetime of the context to the lifetime of the sandbox.

This is a backport of #5786 to v5.x.

Ref: #5786
PR-URL: #5800
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
rvagg pushed a commit to rvagg/io.js that referenced this pull request May 20, 2016
When the previous set of changes (bfff07b) it was possible to have the
context get garbage collected while sandbox was still live. We need to
tie the lifetime of the context to the lifetime of the sandbox.

This is a backport of nodejs#5786 to v5.x.

Ref: nodejs#5786
PR-URL: nodejs#5800
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
MylesBorins pushed a commit that referenced this pull request May 20, 2016
When the previous set of changes (bfff07b) it was possible to have the
context get garbage collected while sandbox was still live. We need to
tie the lifetime of the context to the lifetime of the sandbox.

This is a backport of #5786 to v5.x.

Ref: #5786
PR-URL: #5800
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
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vm: recent contextify changes cause segmentation fault in node v5.9
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