MessagePort: implement disentanglement (#36654)

Implement
[disentangle](https://html.spec.whatwg.org/multipage/#disentangle)
Remove bespoke gc logic which now becomes unnecessary. 
Adds a wpt test that hits the "disentangle while in transfer" logic.
Updates streams code, fixing an error where disentanglement is
conditional on an error.

Test coverage: there are existing tests in
`/webmessaging/message-channels/close-event/explicitly-closed.tentative.window.js`
for the no transfer case, and the simple completed transfer case, and
this PR adds a test for the more complicated transfer in progress case.

Fix https://github.com/servo/servo/issues/36465

---------

Signed-off-by: gterzian <2792687+gterzian@users.noreply.github.com>
This commit is contained in:
Gregory Terzian 2025-04-30 12:49:38 +02:00 committed by GitHub
parent c46402e222
commit af5d665efa
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19 changed files with 356 additions and 191 deletions

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@ -893,7 +893,7 @@ impl WritableStream {
global.note_cross_realm_transform_writable(&cross_realm_transform_writable, port_id);
// Enable ports port message queue.
port.Start();
port.Start(can_gc);
// Perform ! SetUpWritableStreamDefaultController
controller
@ -1202,7 +1202,7 @@ impl CrossRealmTransformWritable {
.error_if_needed(cx, rooted_error.handle(), global, can_gc);
// Disentangle port.
global.disentangle_port(port);
global.disentangle_port(port, can_gc);
}
}