Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 6dd9ed3d3ea1fd36f678f2652c05097f61b0caa7
https://github.com/WebKit/WebKit/commit/6dd9ed3d3ea1fd36f678f2652c05097f61b0caa7
Author: BJ Burg <[email protected]>
Date: 2026-08-12 (Wed, 12 Aug 2026)
Changed paths:
M Source/WebKit/UIProcess/API/Cocoa/_WKAutomationSession.mm
M Source/WebKit/UIProcess/Automation/WebAutomationSession.cpp
M Source/WebKit/UIProcess/Automation/WebAutomationSession.h
M Source/WebKit/UIProcess/WebProcessPool.cpp
Log Message:
-----------
[Web Automation] Apply the session's Site Isolation preference to vended
automation pages
https://bugs.webkit.org/show_bug.cgi?id=296394
rdar://178913733
Reviewed by Qianlang Chen and Sihui Liu.
An automation session created with siteIsolationEnabled had no way to carry that
preference onto the pages it vends: the flag lived on the
_WKAutomationSessionConfiguration but was never applied to a new browsing
context's
WebPreferences, so Site Isolation never engaged for automation-driven pages.
Stamp the configuration's siteIsolationEnabled onto WebAutomationSession at
session-creation time, then in createBrowsingContext() inject it into the vended
page's WebPreferences before process assignment. Only the vended automation
page is affected;
sibling pool pages keep their own preferences.
Update `WebProcessPool` to override keeping frames in the same process when
site isolation is enabled.
That behavior was introduced in https://commits.webkit.org/201369@main as a
guard against PSON (process swap on nagivation)
to force keeping automation sessions working the same process.
Automation was built on a single-process-per-page assumption that predates both
PSON and site isolation.
`WebAutomationSession` (UI process) drives one `WebAutomationSessionProxy` per
`WebProcess`,
and it caches state that only means anything inside a specific WebProcess:
- injected JS atoms,
- element/node handles
- the current frame handle.
* Source/WebKit/UIProcess/API/Cocoa/_WKAutomationSession.mm:
(-[_WKAutomationSession initWithConfiguration:]):
* Source/WebKit/UIProcess/Automation/WebAutomationSession.cpp:
(WebKit::WebAutomationSession::WebAutomationSession):
(WebKit::WebAutomationSession::createBrowsingContext):
* Source/WebKit/UIProcess/Automation/WebAutomationSession.h:
* Source/WebKit/UIProcess/WebProcessPool.cpp:
(WebKit::WebProcessPool::processForNavigationInternal):
Canonical link: https://commits.webkit.org/319024@main
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