[webkit-changes] [WebKit/WebKit] cd1990: [iOS] Network process unresponsive due to suspension

[Miguel Salinas]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: cd1990281851f02d502f18377b4355dcd1e5f2bf
      https://github.com/WebKit/WebKit/commit/cd1990281851f02d502f18377b4355dcd1e5f2bf
  Author: Miguel Salinas <miguel_salinas at apple.com>
  Date:   2023-04-17 (Mon, 17 Apr 2023)

  Changed paths:
    M Source/WebKit/UIProcess/ProcessThrottler.h
    M Source/WebKit/UIProcess/WebProcessProxy.cpp

  Log Message:
  -----------
  [iOS] Network process unresponsive due to suspension
https://bugs.webkit.org/show_bug.cgi?id=255417
rdar://105621258

Reviewed by Chris Dumez.

If a WebContent process is a standalone worker process with a foreground
assertion/activity (e.g. a worker for a foreground view) and then a page
gets added to the process it will never take an assertion on the network
process as it should. We need to make sure we call
WebProcessProxy::didChangeThrottleState() when a standalone worker
process becomes a web content process with a page.
WebProcessProxy::didChangeThrottleState() checks
isStandaloneServiceWorkerProcess() and drops all network assertions if
it returns true.

* Source/WebKit/UIProcess/ProcessThrottler.h:
(WebKit::ProcessThrottler::currentState):
* Source/WebKit/UIProcess/WebProcessProxy.cpp:
(WebKit::WebProcessProxy::addExistingWebPage):

Canonical link: https://commits.webkit.org/263031@main