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Auto merge of #16814 - asajeffrey:script-worklets, r=jdm

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Implement Houdini worklets

<!-- Please describe your changes on the following line: -->

This PR implements the current draft Houdini Worklets specification (https://drafts.css-houdini.org/worklets/).

The implementation is intended to provide a responsive environment for worklet execution, and in particular to ensure that the primary worklet executor does not garbage collect, and does not block loading module code. The implementation does this by providing a thread pool, and performing GC and module loading in a backup thread, not in the primary thread.

---
<!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: -->
- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #16206
- [x] There are tests for these changes

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<!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. -->

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This commit is contained in:
bors-servo 2017-05-17 16:20:42 -05:00 • committed by GitHub
commit ac99a48aea
34 changed files with 1209 additions and 17 deletions
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39
tests/wpt/mozilla/meta/MANIFEST.json
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@ -11185,6 +11185,21 @@
[
{}
]
],
"mozilla/worklets/syntax_error.js": [
[
{}
]
],
"mozilla/worklets/test_worklet.js": [
[
{}
]
],
"mozilla/worklets/throw_exception.js": [
[
{}
]
]
},
"testharness": {
@ -20027,6 +20042,12 @@
"/_mozilla/mozilla/windowproxy.html",
{}
]
],
"mozilla/worklets/test_worklet.html": [
[
"/_mozilla/mozilla/worklets/test_worklet.html",
{}
]
]
}
},
@ -25796,7 +25817,7 @@
"testharness"
],
"mozilla/interfaces.html": [
"21e18bafdbfe5f3aa0ee71766bdc3b6a7e334226",
"49dd9f6ef449813f2ce943d4c9fac351357e5c74",
"testharness"
],
"mozilla/interfaces.js": [
@ -31714,6 +31735,22 @@
"mozilla/windowproxy.html": [
"128cd0aa5cf80f60078979039036d32b470b0616",
"testharness"
],
"mozilla/worklets/syntax_error.js": [
"f3a9b8c78346507bc0b3190c8000ccf80cc133f6",
"support"
],
"mozilla/worklets/test_worklet.html": [
"fe9c93a5307c616f878b6623155e1b04c86dd994",
"testharness"
],
"mozilla/worklets/test_worklet.js": [
"9d5f8a07cd62a10f4f5ff93744672e5a6fdbc2b0",
"support"
],
"mozilla/worklets/throw_exception.js": [
"ebfdae19db68fed8e69142ef73842ac9921e4463",
"support"
]
},
"url_base": "/_mozilla/",

3
tests/wpt/mozilla/meta/mozilla/worklets/test_worklet.html.ini Normal file
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@ -0,0 +1,3 @@
[test_worklet.html]
type: testharness
prefs: [dom.worklet.testing.enabled:true]

1
tests/wpt/mozilla/tests/mozilla/interfaces.html
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@ -200,6 +200,7 @@ test_interfaces([
"WebSocket",
"Window",
"Worker",
"Worklet",
"XMLDocument",
"XMLHttpRequest",
"XMLHttpRequestEventTarget",

1
tests/wpt/mozilla/tests/mozilla/worklets/syntax_error.js Normal file
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@ -0,0 +1 @@
{];

35
tests/wpt/mozilla/tests/mozilla/worklets/test_worklet.html Normal file
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@ -0,0 +1,35 @@
<!doctype html>
<meta charset="utf-8">
<title>Test worklet loading</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script>
var testWorklet = new TestWorklet();
var host_info = get_host_info();
promise_test(function() {
return testWorklet.addModule("test_worklet.js")
.then(function () {
assert_equals(testWorklet.lookup("hello"), "world");
});
}, "Loading a test worklet.");
promise_test(function(t) {
var path = new URL("test_worklet.js", document.location).pathname;
var url = new URL(path, host_info.HTTP_REMOTE_ORIGIN);
return promise_rejects(t, "AbortError", testWorklet.addModule(url));
}, "Loading a cross-origin test worklet.");
promise_test(function(t) {
return promise_rejects(t, "AbortError", testWorklet.addModule("nonexistent_worklet.js"));
}, "Loading a nonexistent test worklet.");
promise_test(function(t) {
return promise_rejects(t, "AbortError", testWorklet.addModule("syntax_error.js"));
}, "Loading a syntactically incorrect test worklet.");
promise_test(function(t) {
return promise_rejects(t, "AbortError", testWorklet.addModule("throw_exception.js"));
}, "Loading an exception-throwing test worklet.");
</script>

1
tests/wpt/mozilla/tests/mozilla/worklets/test_worklet.js Normal file
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@ -0,0 +1 @@
registerKeyValue("hello", "world");

1
tests/wpt/mozilla/tests/mozilla/worklets/throw_exception.js Normal file
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@ -0,0 +1 @@
throw new TypeError();