inspector: split main thread interface from transport by eugeneo · Pull Request #21182 · nodejs/node

eugeneo · 2018-06-06T23:20:39Z

Workers debugging will require interfacing between the "main" inspector
and per-worker isolate inspectors. This is consistent with what WS
interface does. This change is a refactoring change and does not change
the functionality.

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
commit message follows commit guidelines

eugeneo · 2018-06-06T23:25:12Z

src/signal_wrap.cc

Here I am unsure about the semantics. Do we want this warning printed out when Inspector is installed on the isolate (which is currently "always", because of JS API and _debugProcess support) or when the WS server is running.

eugeneo · 2018-06-06T23:27:02Z

src/inspector_agent.cc

My understanding is that make_shared should be fine as it is a part of C++11 (make_unique was introduced shortly after C++11)

eugeneo · 2018-06-06T23:28:08Z

src/inspector_agent.h

Fixed locally, will upload when addressing future review comments.

eugeneo · 2018-06-06T23:30:20Z

src/inspector_io.cc

Looks like this is a first usage of std::weak_ptr in Node codebase. Standard seems to require it to be thread-safe. I would like to confirm with people familiar with less wide-spread platforms it is ok to use it here.

eugeneo · 2018-06-06T23:31:50Z

test/parallel/test-warn-sigprof.js

This change is because I assume handling SIGPROF should only produce the warning when the WS server is running

eugeneo · 2018-06-06T23:33:13Z

test/cctest/test_inspector_socket_server.cc

Will remove this delta in next upload.

addaleax

Nice work! I’ll need more time to look at this in detail, but I’ll try to do it if I find that time.

addaleax · 2018-06-07T16:19:47Z

node.gyp

These two headers don’t exist anymore, I think we want to remove them from this PR?

addaleax · 2018-06-07T16:20:19Z

src/inspector/main_thread_interface.cc

Can you mark these override?

addaleax · 2018-06-07T16:20:54Z

src/inspector/main_thread_interface.cc

style nit: static_cast

eugeneo · 2018-06-07T18:43:55Z

Thanks for the review.
Please note there are tests failing (apparently, everywhere except Debian I'm using locally) - I will be addressing them. I do not expect having to change anything drastically.

eugeneo · 2018-06-11T18:48:57Z

This PR needs bit more significant changes then anticipated, it is still in progress.

eugeneo · 2018-06-16T00:29:31Z

I've uploaded a new change and this PR is now ready for review. This change addresses a race condition that caused some inspector tests to become unreliable, I will run stress tests to confirm it.

eugeneo · 2018-06-17T01:56:25Z

CI link (all green): https://ci.nodejs.org/job/node-test-pull-request/15500/

eugeneo · 2018-06-17T05:04:59Z

Stress tests: https://ci.nodejs.org/job/node-stress-single-test/1926/nodes=win2016-1p-vs2017/console

My understanding is that the tests were not flaky. Did I have to remove them from the flaky tests list first?

TimothyGu

A few nits.

TimothyGu · 2018-06-17T04:39:47Z

src/inspector_io.h

This comment should move with class Environment.

TimothyGu · 2018-06-17T04:48:04Z

src/inspector_io.cc

One more level of indentaiton.

jasnell

LGTM but I'd like @addaleax to review also :-)

eugeneo · 2018-07-09T16:31:35Z

I did a rebase. I was unable to reintegrate WS messages logging, it was not implemented correctly (was accessing env from the non-main thread). Is it really necessary?

CI: https://ci.nodejs.org/job/node-test-pull-request/15770/

eugeneo · 2018-07-09T16:32:14Z

@addaleax can you please take a look?

eugeneo · 2018-07-09T17:40:54Z

Another CI, previous push excluded some fixes from another workstation: https://ci.nodejs.org/job/node-test-pull-request/15772/

addaleax · 2018-07-09T16:37:31Z

src/inspector/main_thread_interface.cc

nit: I’d use std::shared_ptr<T> object here explicitly, and std::shared_ptr<T> object_; as the member, to be clearer about how this is being used

Done. Added some asserts to ensure resetting the pointer actually destroys the object.

addaleax · 2018-07-09T16:39:28Z

src/inspector/main_thread_interface.cc

nit: This can just be an inline lambda, that makes it a bit more readable since it’s much closer to the call site then

addaleax · 2018-07-09T16:42:16Z

src/inspector/main_thread_interface.cc

style nit: Leave a space between method definitions

addaleax · 2018-07-09T16:44:01Z

src/inspector/main_thread_interface.cc

It might be good to add a comment explaining what “Block” means in this context (It’s not clear to me at this point)

I renamed the class, hope now it is more clear. It is meant to keep the parts of the state that live on another thread separate.

addaleax · 2018-07-09T16:44:39Z

src/inspector/main_thread_interface.cc

Is this unused?

addaleax · 2018-07-09T17:27:01Z

src/inspector/main_thread_interface.h

Can you add a comment indicating which members exactly are protected by this lock?

Done. Also, renamed the lock.

addaleax · 2018-07-09T17:29:10Z

src/inspector_agent.cc

const v8_inspector::StringView&?

addaleax · 2018-07-09T17:36:35Z

src/inspector_io.cc

(tiny) style nit: put : on the next line

addaleax · 2018-07-09T17:38:10Z

src/inspector_io.cc

Might be worth using std::deque<Message> for some struct Message { … }; instead, for readability?

addaleax · 2018-07-09T17:40:37Z

src/inspector_io.cc

I’d personally make both of these lambdas as well, for readability

eugeneo · 2018-07-09T21:09:12Z

Thank you for the review. I addressed the comments.

eugeneo · 2018-07-10T16:38:36Z

Investigating a test failure.

eugeneo · 2018-07-10T21:01:51Z

Stress test for the fixed Windows failure: https://ci.nodejs.org/job/node-stress-single-test/1943/

New CI for this change: https://ci.nodejs.org/job/node-test-pull-request/15786/

eugeneo · 2018-07-10T21:48:34Z

100 iterations of the tests marked as flaky on Windows - https://ci.nodejs.org/job/node-stress-single-test/nodes=win2012r2-mp-vs2017/1944/

Looks like no failures, there is some weird macOS 10.10 failure, will need to investigate.

eugeneo · 2018-07-12T00:01:09Z

I redid management for objects living on another thread. CI is green now: https://ci.nodejs.org/job/node-test-pull-request/15816/

I also run a stress test on a number of inspector flaky tests, seems like they should be fixed now.

Delta with the reviewed version: 14cb71a

I do not think the changes are big enough to invalidate the approvals, but I will wait a couple days in case there are any comments.

Workers debugging will require interfacing between the "main" inspector and per-worker isolate inspectors. This is consistent with what WS interface does. This change is a refactoring change and does not change the functionality. PR-URL: #21182 Fixes: #21725 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>

addaleax · 2018-07-13T18:29:50Z

CI failure in the status bar looks weird (edit: see Eugene’s run below)

CI: https://ci.nodejs.org/job/node-test-pull-request/15865/

eugeneo · 2018-07-13T18:33:35Z

CI: https://ci.nodejs.org/job/node-test-pull-request/15856/

There is one failure, when building V8 files on CentOS7. I am fairly confident this can be ignored. I will land the change.

addaleax · 2018-07-13T23:05:07Z

Landed in 39977db

Workers debugging will require interfacing between the "main" inspector and per-worker isolate inspectors. This is consistent with what WS interface does. This change is a refactoring change and does not change the functionality. PR-URL: nodejs#21182 Fixes: nodejs#21725 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>

After nodejs#21182, the test is no longer flaky. Since it doesn’t use a static port, moving it to parallel seems justified.

Workers debugging will require interfacing between the "main" inspector and per-worker isolate inspectors. This is consistent with what WS interface does. This change is a refactoring change and does not change the functionality. PR-URL: #21182 Fixes: #21725 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>

Workers debugging will require interfacing between the "main" inspector and per-worker isolate inspectors. This is consistent with what WS interface does. This change is a refactoring change and does not change the functionality. PR-URL: nodejs#21182 Fixes: nodejs#21725 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>

Trott · 2018-07-15T16:59:27Z

Unfortunately, this change seems to have increased the failure of sequential/test-debug-prompt test on OS X 10.10 (Yosemite) in CI from about 0.01% failure to about a 24% failure. See #21724. I'm not sure if the problem lies here or in the test or is something specific to older versions of OS X.

EDIT: PR to possibly fix test: #21826.

After #21182, the test is no longer flaky. Since it doesn’t use a static port, moving it to parallel seems justified. PR-URL: #21806 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Jon Moss <me@jonathanmoss.me> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Minwoo Jung <minwoo@nodesource.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

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. labels Jun 6, 2018

eugeneo commented Jun 6, 2018

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test/cctest/test_inspector_socket_server.cc Outdated

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Will remove this delta in next upload.

addaleax reviewed Jun 7, 2018

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eugeneo mentioned this pull request Jun 7, 2018

Inspector tests leaving around stale processes nodejs/reliability#5

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eugeneo mentioned this pull request Jun 16, 2018

Worker debug #21364

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TimothyGu reviewed Jun 17, 2018

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jasnell approved these changes Jun 21, 2018

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addaleax reviewed Jul 9, 2018

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addaleax mentioned this pull request Jul 9, 2018

Investigate flaky sequential/test-inspector-break-when-eval #21725

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eugeneo added the wip Issues and PRs that are still a work in progress. label Jul 10, 2018

eugeneo removed the wip Issues and PRs that are still a work in progress. label Jul 10, 2018

eugeneo added the wip Issues and PRs that are still a work in progress. label Jul 10, 2018

eugeneo removed the wip Issues and PRs that are still a work in progress. label Jul 12, 2018

addaleax added the inspector Issues and PRs related to the V8 inspector protocol label Jul 13, 2018

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addaleax closed this Jul 13, 2018

addaleax added a commit to addaleax/node that referenced this pull request Jul 13, 2018

test: move inspector test back to parallel, unmark flaky

b11cf20

After nodejs#21182, the test is no longer flaky. Since it doesn’t use a static port, moving it to parallel seems justified.

addaleax mentioned this pull request Jul 13, 2018

test: move inspector test back to parallel, unmark flaky #21806

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eugeneo deleted the asyncs_io_prepare_worker branch July 14, 2018 00:23

targos mentioned this pull request Jul 17, 2018

v10.7.0 proposal #21851

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codebytere mentioned this pull request Jun 19, 2019

repl.start Causes Crash in Renderer electron/electron#18872

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pipobscure mentioned this pull request Nov 12, 2019

VSCode 1.40 crash after startup with segmentation fault microsoft/vscode#84233

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eugeneo commented Jun 6, 2018

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