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src: remove unowned usages of GetBackingStore #44080

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merged 2 commits into from
Aug 3, 2022
Merged

src: remove unowned usages of GetBackingStore #44080

merged 2 commits into from
Aug 3, 2022

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kvakil
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@kvakil kvakil commented Aug 1, 2022

This removes all usages of GetBackingStore without any entries in the
CODEOWNERS file. For the most part this is a pretty straightforward
review; except SPREAD_BUFFER_ARG and the changes to CopyArrayBuffer.

See the linked issue for an explanation.

Refs: #32226
Refs: #43921

@kvakil
src: remove unowned usages of GetBackingStore
24a94f0 
This removes all usages of GetBackingStore without any entries in the
`CODEOWNERS` file. For the most part this is a pretty straightforward
review; except `SPREAD_BUFFER_ARG` and the changes to `CopyArrayBuffer`.

See the linked issue for an explanation.

Refs: nodejs#32226
Refs: nodejs#43921
@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 Aug 1, 2022
@kvakil kvakil added the buffer Issues and PRs related to the buffer subsystem. label Aug 1, 2022
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kvakil commented Aug 1, 2022

cc @nodejs/buffer

There are also the following related PRs, but I'm opting not to CC the group on all of them, since they already have codeowners:

  1. src: remove usages of GetBackingStore in crypto #44079
  2. src: remove usages of GetBackingStore in startup #44078
  3. src: remove usages of GetBackingStore in WASI #44077
  4. src: remove usages of GetBackingStore in modules #44076
  5. src: remove usages of GetBackingStore in node-api #44075

RaisinTen
RaisinTen approved these changes Aug 1, 2022
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LGTM

src/node_buffer.cc Outdated Show resolved Hide resolved
kvakil
kvakil commented Aug 1, 2022
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src/node_buffer.cc
Comment on lines -1255 to -1256
} else if (args[0]->IsSharedArrayBuffer()) {
source = args[2].As<SharedArrayBuffer>()->GetBackingStore();
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@nodejs/whatwg-stream: this is a typo: the first args[0] should be args[2]. I don't think it ends up being an issue in practice. The only user of copyArrayBuffer is in lib/internal/webstreams/readablestream.js, and it doesn't seem possible to pass in a SharedArrayBuffer to either of its arguments.

Anyway, the code motion in this diff fixes the issue anyway.

mcollina
mcollina approved these changes Aug 1, 2022
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lgtm

@kvakil kvakil added the request-ci Add this label to start a Jenkins CI on a PR. label Aug 1, 2022
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CI: https://ci.nodejs.org/job/node-test-pull-request/45780/

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@kvakil kvakil added the request-ci Add this label to start a Jenkins CI on a PR. label Aug 2, 2022
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CI: https://ci.nodejs.org/job/node-test-pull-request/45784/

@kvakil kvakil added the request-ci Add this label to start a Jenkins CI on a PR. label Aug 2, 2022
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CI: https://ci.nodejs.org/job/node-test-pull-request/45786/

@kvakil kvakil added the request-ci Add this label to start a Jenkins CI on a PR. label Aug 2, 2022
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CI: https://ci.nodejs.org/job/node-test-pull-request/45791/

@kvakil kvakil added the request-ci Add this label to start a Jenkins CI on a PR. label Aug 2, 2022
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CI: https://ci.nodejs.org/job/node-test-pull-request/45804/

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CI: https://ci.nodejs.org/job/node-test-pull-request/45805/

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CI: https://ci.nodejs.org/job/node-test-pull-request/45812/

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CI: https://ci.nodejs.org/job/node-test-pull-request/45814/

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F3n67u commented Aug 3, 2022

CI: https://ci.nodejs.org/job/node-test-pull-request/45812/

@kvakil FYI. Jenkins CI run has two modes: fresh build and Resume Build. Adding request-ci label will trigger a fresh build, and everything will start fresh. Resume Build mode will only retry the failed test which is more likely to hit a retry success. But Resume Build mode could only be triggered by a collaborator in Jenkins CI. see https://github.com/nodejs/node/blob/main/doc/contributing/collaborator-guide.md#testing-and-ci for more details.

If Jenkins CI fails often(like in this pr), it would be better to let a collaborator trigger a resume build, instead of restarting a fresh test every time. In long term, we should solve those test flaky or test infra problems. So if you could help to take a look at those problems when ci flaky, it will be great.

@nodejs-github-bot nodejs-github-bot removed the commit-queue Add this label to land a pull request using GitHub Actions. label Aug 3, 2022
@nodejs-github-bot nodejs-github-bot merged commit 8c35a4e into nodejs:main Aug 3, 2022
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kvakil commented Aug 3, 2022 via email

This was referenced Aug 5, 2022
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danielleadams pushed a commit that referenced this pull request Aug 16, 2022
@kvakil @danielleadams
src: remove unowned usages of GetBackingStore
c7373b7 
This removes all usages of GetBackingStore without any entries in the
`CODEOWNERS` file. For the most part this is a pretty straightforward
review; except `SPREAD_BUFFER_ARG` and the changes to `CopyArrayBuffer`.

See the linked issue for an explanation.

Refs: #32226
Refs: #43921
PR-URL: #44080
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
@danielleadams danielleadams mentioned this pull request Aug 16, 2022
Closed
ruyadorno pushed a commit that referenced this pull request Aug 23, 2022
@kvakil @ruyadorno
src: remove unowned usages of GetBackingStore
a2022e5 
This removes all usages of GetBackingStore without any entries in the
`CODEOWNERS` file. For the most part this is a pretty straightforward
review; except `SPREAD_BUFFER_ARG` and the changes to `CopyArrayBuffer`.

See the linked issue for an explanation.

Refs: #32226
Refs: #43921
PR-URL: #44080
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
@ruyadorno ruyadorno mentioned this pull request Aug 23, 2022
Merged
kvakil added a commit to kvakil/node that referenced this pull request Sep 9, 2022
@kvakil
buffer: revert GetBackingStore optimization in API
8df27df 
In an earlier PR, I replaced a lot of instances of
`GetBackingStore()->Data()` with `Data()`. Apparently these two are not
equivalent in the case of zero-length buffers: the former returns a
"valid" address, while the latter returns `NULL`. At least one library
in the ecosystem (see the referenced issue) abuses zero-length buffers
to wrap arbitrary pointers, which is broken by this difference. It is
unfortunate that every library needs to take a performance hit because
of this edge-case, and somebody should figure out if this is actually a
reasonable contract to uphold long-term.

I have not traced down exactly why this divergence occurs, but I have
verified that reverting this line fixes the referenced issue.

Refs: nodejs#44080
Fixes: nodejs#44554
@kvakil kvakil mentioned this pull request Sep 9, 2022
Open
kvakil added a commit to kvakil/node that referenced this pull request Sep 9, 2022
@kvakil
buffer: revert GetBackingStore optimization in API
5ca238a 
In an earlier PR, I replaced a lot of instances of
`GetBackingStore()->Data()` with `Data()`. Apparently these two are not
equivalent in the case of zero-length buffers: the former returns a
"valid" address, while the latter returns `NULL`. At least one library
in the ecosystem (see the referenced issue) abuses zero-length buffers
to wrap arbitrary pointers, which is broken by this difference. It is
unfortunate that every library needs to take a performance hit because
of this edge-case, and somebody should figure out if this is actually a
reasonable contract to uphold long-term.

I have not traced down exactly why this divergence occurs, but I have
verified that reverting this line fixes the referenced issue.

Refs: nodejs#44080
Fixes: nodejs#44554
tniessen pushed a commit to kvakil/node that referenced this pull request Sep 12, 2022
@kvakil @tniessen
buffer: revert GetBackingStore optimization in API
c947744 
In an earlier PR, I replaced a lot of instances of
`GetBackingStore()->Data()` with `Data()`. Apparently these two are not
equivalent in the case of zero-length buffers: the former returns a
"valid" address, while the latter returns `NULL`. At least one library
in the ecosystem (see the referenced issue) abuses zero-length buffers
to wrap arbitrary pointers, which is broken by this difference. It is
unfortunate that every library needs to take a performance hit because
of this edge-case, and somebody should figure out if this is actually a
reasonable contract to uphold long-term.

I have not traced down exactly why this divergence occurs, but I have
verified that reverting this line fixes the referenced issue.

Refs: nodejs#44080
Fixes: nodejs#44554
Fyko pushed a commit to Fyko/node that referenced this pull request Sep 15, 2022
@kvakil @Fyko
src: remove unowned usages of GetBackingStore
6d9f3ce 
This removes all usages of GetBackingStore without any entries in the
`CODEOWNERS` file. For the most part this is a pretty straightforward
review; except `SPREAD_BUFFER_ARG` and the changes to `CopyArrayBuffer`.

See the linked issue for an explanation.

Refs: nodejs#32226
Refs: nodejs#43921
PR-URL: nodejs#44080
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
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