Bug 153499 – Web Inspector: console.profile should use the new Sampling Profiler

• Status: RESOLVED
• Resolution: FIXED
• Component: Web Inspector

[Joseph Pecoraro]

* SUMMARY
console.profile should use the new Sampling Profiler.

* NOTES
- Currently it uses the LegacyProfiler. It should work with the new Sampling Profiler.
- How that looks is yet to be determined.
  - Should it enable/disable some set of instruments the frontend has told the backend about?
  - Should it just start/stop the ScriptProfiler? which will send profiles to the frontend when done.
  - Should it send sample payload to the frontend on console.profileEnd?

[Radar WebKit Bug Importer]

<rdar://problem/24352431>

[Joseph Pecoraro]

I have this working now that we've removed the LegacyProfiler.

It takes advantage of the frontend informing the backend of the enabled Instruments (which was added for auto record on page navigations).

I just need to clean the patches up, test, and justify the policy choices I made.

[Joseph Pecoraro]

*** Bug 136466 has been marked as a duplicate of this bug. ***

[Joseph Pecoraro]

Created attachment 281294 [details]
[PATCH] Proposed Fix

Depends on bug 158762.

[Joseph Pecoraro]

Created attachment 281316 [details]
[PATCH] Proposed Fix

[Timothy Hatcher]

Comment on attachment 281316 [details]
[PATCH] Proposed Fix

View in context: https://bugs.webkit.org/attachment.cgi?id=281316&action=review

Very clean!

> Source/JavaScriptCore/inspector/agents/InspectorScriptProfilerAgent.cpp:223
> +}
> +void InspectorScriptProfilerAgent::programmaticCaptureStopped()

Newline.

> Source/WebCore/inspector/InspectorTimelineAgent.cpp:249
> +    // Allow duplicate unnamed profiles. Disallow duplicate named profiles.
> +    if (!title.isEmpty()) {

Sad this needs duplicated.

[Joseph Pecoraro]

Created attachment 281520 [details]
[PATCH] For Landing

[WebKit Commit Bot]

Comment on attachment 281520 [details]
[PATCH] For Landing

Clearing flags on attachment: 281520

Committed r202152: <http://trac.webkit.org/changeset/202152>

[Alexey Proskuryakov]

The new test is very unstable, timing out very frequently: 

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=inspector%2Ftimeline%2FsetInstruments-programmatic-capture.html

Rolling out.

[Alexey Proskuryakov]

Rolled out in https://trac.webkit.org/r202196

[Joseph Pecoraro]

(In reply to comment #9)
> The new test is very unstable, timing out very frequently: 

This appears to be the same issue that affects all inspector tests.

Locally, I ran the test, and the directory 400 times in Release and Debug mode without issue. I suggest treating this test the same [ Pass Timeout ] until we have time to investigate the systemic inspector test issue. I filed bug 158948 for these specific timeouts.

[Joseph Pecoraro]

<https://trac.webkit.org/changeset/202234> with TestExpectations