change parse_own_css to queue event not fire synchronously #19307

avadacatavra · 2017-11-21T00:41:08Z

fixes a panic and aligns with spec

I've also added checks around each mutable borrow of the tokenizer to see if we can catch any other panics

./mach build -d does not report any errors
./mach test-tidy does not report any errors
These changes fix #18930 (github issue number if applicable).

There are tests for these changes OR
These changes do not require tests because _____

This change is

highfive · 2017-11-21T00:41:15Z

Heads up! This PR modifies the following files:

@fitzgen: components/script/dom/htmlstyleelement.rs, components/script/dom/servoparser/mod.rs
@KiChjang: components/script/dom/htmlstyleelement.rs, components/script/dom/servoparser/mod.rs

highfive · 2017-11-21T00:41:16Z

Warning

These commits modify script code, but no tests are modified. Please consider adding a test!

avadacatavra · 2017-11-21T00:41:24Z

r? jdm

jdm · 2017-11-21T00:51:17Z

components/script/dom/servoparser/mod.rs

@@ -175,6 +175,7 @@ impl ServoParser {
        document.set_current_parser(Some(&parser));
        if !type_.eq_ignore_ascii_case("text/html") {
            parser.parse_string_chunk("<pre>\n".to_owned());
+            assert!(parser.tokenizer.try_borrow_mut().is_ok());


Asserting here is no different than performing the infallible borrow. Rather than adding these extra asserts everywhere, I would like a single API on ServoParser called something like parser_is_not_active (and an API on Document named something like can_invoke_script, which has access to the parser), and we should assert that that API returns true when we're asked to dispatch an event in EventTarget.

avadacatavra · 2017-11-21T12:03:36Z

@jdm not sure if i should queue the events if the parser is in use?

jdm · 2017-11-21T12:57:15Z

No, we don't want to change behaviour based on this. We simply want to expose potential problems that could end up interacting with the parser if they invoke document.write.

jdm

To make sure this works locally, please run ./mach test-wpt workers/. This would have caught the problem with unwrapping the the downcast to Window, which doesn't work in a non-window global.

jdm · 2017-11-21T13:02:42Z

components/script/dom/eventtarget.rs

@@ -315,11 +315,35 @@ impl EventTarget {
    pub fn dispatch_event_with_target(&self,
                                      target: &EventTarget,
                                      event: &Event) -> EventStatus {
-        event.dispatch(self, Some(target))


Assert here, and let's match on target.global().downcast::<Window>() instead of trying Element (keeping in mind that None is valid).

jdm · 2017-11-21T13:02:42Z

components/script/dom/eventtarget.rs

    }

    pub fn dispatch_event(&self, event: &Event) -> EventStatus {
-        event.dispatch(self, None)


Assert here, and do the same as the previous comment but using self.

jdm · 2017-11-21T19:58:13Z

@bors-servo: try

bors-servo · 2017-11-21T19:58:18Z

⌛ Trying commit 0269db1 with merge 553e4ea...


        Auto merge of #19307 - avadacatavra:domrefcellpanic, r=<try>

change parse_own_css to queue event not fire synchronously  fixes a panic and aligns with spec I've also added checks around each mutable borrow of the tokenizer to see if we can catch any other panics ---  - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #18930 (github issue number if applicable).  - [ ] There are tests for these changes OR - [ ] These changes do not require tests because _____    --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/19307)

bors-servo · 2017-11-21T20:55:30Z

💔 Test failed - mac-rel-wpt3

avadacatavra · 2017-11-21T21:07:14Z

@bors-servo retry


        Auto merge of #19307 - avadacatavra:domrefcellpanic, r=<try>

change parse_own_css to queue event not fire synchronously  fixes a panic and aligns with spec I've also added checks around each mutable borrow of the tokenizer to see if we can catch any other panics ---  - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #18930 (github issue number if applicable).  - [ ] There are tests for these changes OR - [ ] These changes do not require tests because _____    --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/19307)

bors-servo · 2017-11-21T21:07:19Z

⌛ Trying commit 0269db1 with merge 167c884...

bors-servo · 2017-11-21T21:46:14Z

💔 Test failed - mac-rel-wpt3

jdm

Looks good!

jdm · 2017-11-29T22:43:49Z

.../web-platform-tests/html/semantics/document-metadata/the-style-element/style_load_async.html

+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style onload="document.blah = true">
+</style>


This style block can be removed now.

jdm · 2017-11-29T22:43:49Z

tests/wpt/metadata/custom-elements/parser/parser-fallsback-to-unknown-element.html.ini

@@ -0,0 +1,3 @@
+;bug: https://github.com/servo/servo/issues/19392


This (and the other ini file) should be:

[parser-fallsback-to-unknown-element.html] expected: CRASH bug: https://github.com/servo/servo/issues/19392

jdm · 2017-11-29T22:43:49Z

components/script/dom/servoparser/mod.rs

@@ -102,6 +102,10 @@ enum LastChunkState {
 }

 impl ServoParser {
+    pub fn parser_is_not_active(&self) -> bool {
+        self.tokenizer.try_borrow_mut().is_ok()


Let's add || self.can_write(), so that this is handled correctly when #19393 is fixed.

jdm · 2017-11-29T22:43:49Z

components/script/dom/eventtarget.rs

@@ -315,10 +315,23 @@ impl EventTarget {
    pub fn dispatch_event_with_target(&self,
                                      target: &EventTarget,
                                      event: &Event) -> EventStatus {
+        match target.global().downcast::<Window>() {
+            Some(window) => if window.has_document() {


Let's use if let

jdm · 2017-11-29T22:43:49Z

components/script/dom/eventtarget.rs

        event.dispatch(self, Some(target))
    }

    pub fn dispatch_event(&self, event: &Event) -> EventStatus {
+        match self.global().downcast::<Window>() {



        queue event instead of immediately fire

created checks to see if parser is in use before event dispatch changed tests to expect crash and added async style test

jdm · 2017-12-01T17:17:31Z

@bors-servo: r+

bors-servo · 2017-12-01T17:17:32Z

📌 Commit 79d896d has been approved by jdm

bors-servo · 2017-12-01T17:41:49Z

⌛ Testing commit 79d896d with merge 712d75a...


        Auto merge of #19307 - avadacatavra:domrefcellpanic, r=jdm

change parse_own_css to queue event not fire synchronously  fixes a panic and aligns with spec I've also added checks around each mutable borrow of the tokenizer to see if we can catch any other panics ---  - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #18930 (github issue number if applicable).  - [ ] There are tests for these changes OR - [ ] These changes do not require tests because _____    --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/19307)

bors-servo · 2017-12-01T18:58:06Z

☀️ Test successful - android, arm32, arm64, linux-dev, linux-rel-css, linux-rel-wpt, mac-dev-unit, mac-rel-css1, mac-rel-css2, mac-rel-wpt1, mac-rel-wpt2, mac-rel-wpt3, mac-rel-wpt4, windows-msvc-dev
Approved by: jdm
Pushing 712d75a to master...


        queue event instead of immediately fire

created checks to see if parser is in use before event dispatch changed tests to expect crash and added async style test Upstreamed from servo/servo#19307 [ci skip]

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avadacatavra force-pushed the avadacatavra:domrefcellpanic branch from d8e0dba to 0269db1 Nov 21, 2017

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queue event instead of immediately fire

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79d896d

created checks to see if parser is in use before event dispatch changed tests to expect crash and added async style test

avadacatavra force-pushed the avadacatavra:domrefcellpanic branch from a1abe94 to 79d896d Nov 30, 2017

highfive added S-awaiting-merge and removed S-awaiting-review labels Dec 1, 2017

bors-servo merged commit 79d896d into servo:master Dec 1, 2017
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servo-wpt-sync mentioned this pull request Jan 4, 2018

queue event instead of immediately fire web-platform-tests/wpt#8909

Merged

servo / servo

change parse_own_css to queue event not fire synchronously #19307

change parse_own_css to queue event not fire synchronously #19307

avadacatavra commented Nov 21, 2017 •

edited by SimonSapin

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bors-servo commented Dec 1, 2017

		@@ -0,0 +1,3 @@
		;bug: https://github.com/servo/servo/issues/19392

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change parse_own_css to queue event not fire synchronously #19307

change parse_own_css to queue event not fire synchronously #19307

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avadacatavra commented Nov 21, 2017 • edited by SimonSapin

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avadacatavra commented Nov 21, 2017 •

edited by SimonSapin

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edited