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Pulls https://github.com/servo/rust-mozjs/pull/398 and aims to close https://github.com/servo/rust-mozjs/issues/343.
We can't convert from `JSVal` to `Heap<JSVal>` safely (due to GC barriers we can't move Heap value after changing its underlying value to something meaningful, e.g. non-null or non-undefined), so I decided to also wrap the Heap values in a Box (and in dictionaries in RootedTraceableBox, see https://github.com/servo/servo/pull/20265#issuecomment-372838379 and the issue for more details) in dictionaries.
Since we allocate more to be safe, I think it'd be good to also do some sort of a JS perf run, if there is any to see if there's any significant overhead.
r? @jdm
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--HG--
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Supersedes #20205.
This brings support to receiving typed arrays as function arguments (those are stack-rooted with CustomAutoRooter) and also being a member of a union (which is basically heap-rooted? similarly to other webidl unions).
This is based on my other PR #20265 (which means it has to pull an external rust-mozjs branch and contains some also slightly unrelated changes here) since it shares `RootedTraceableBox::from_box` here and some other additional changes at rust-mozjs, but it can be easily separated if needed.
I tried adding support to nullable typed arrays but couldn't work around an issue of codegen always sticking a "OrNull" at the end of my type (presumably because of [this](https://github.com/servo/servo/blob/master/components/script/dom/bindings/codegen/parser/WebIDL.py#L2241)?). How would I go about avoiding the suffix with nullable arguments?
If we were to add also support for nullable typed arrays then I think we wouldn't be blocked anymore on this in WebGL 1.0.
r? @jdm
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Requires safe `Heap::boxed` constructor from https://github.com/servo/rust-mozjs/pull/395 (more info on it is in the PR).
Since unions currently assume that their respective members root themselves and can be stored on heap, I modified the union member object conversion branch to convert to a `RootedTraceableBox<Heap<*mut JSObject>>` (which is the currently generated type for objects in said unions).
I did it only for Unions and not dictionaries, since some dictionaries had bare `*mut JSObject` members - is this a mistake and something that needs further fixing?
Does this need a test, e.g. passing a union with object to a function that returns said object, and comparing the results for equality?
r? @jdm
Generated code with this patch (for `StringOrObject`):
```rust
impl FromJSValConvertible for StringOrObject {
type Config = ();
unsafe fn from_jsval(cx: *mut JSContext,
value: HandleValue,
_option: ())
-> Result<ConversionResult<StringOrObject>, ()> {
if value.get().is_object() {
match StringOrObject::TryConvertToObject(cx, value) {
Err(_) => return Err(()),
Ok(Some(value)) => return Ok(ConversionResult::Success(StringOrObject::Object(value))),
Ok(None) => (),
}
}
// (...)
}
}
impl StringOrObject {
// (...)
unsafe fn TryConvertToObject(cx: *mut JSContext, value: HandleValue) -> Result<Option<RootedTraceableBox<Heap<*mut JSObject>>>, ()> {
Ok(Some(RootedTraceableBox::from_box(Heap::boxed(value.get().to_object()))))
}
}
```
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Attempt at https://github.com/servo/servo/issues/16678. At the moment this pulls an external [remove-handle-conv](https://github.com/Xanewok/rust-mozjs/tree/remove-handle-conv) branch for rust-mozjs (removing `FromJSValConvertible` implementation for `HandleValue` and adding one for `*mut JSObject`)
In short, this roots the `sequence<any>` and `sequence<object>` function arguments using `CustomAutoRooter` (introduced in https://github.com/servo/rust-mozjs/pull/382).
As per https://github.com/servo/servo/issues/16678#issuecomment-302224110 the underlying vector contains raw gc thing pointers instead of handles. To do that, this introduces new possible `isMember = "AutoRoot"` value in CodegenRust.py.
The rooted argument is passed to a function wrapped in a `CustomAutoRooterGuard` [RAII root guard](ed5e37a288/src/rust.rs (L586-L588)) (e.g. as `CustomAutoRooterGuard<Vec<JSVal>>`)
I felt quite out of my depth when trying to adapt CodegenRust.py code, so I'd appreciate any help with how can be done better/in a more clean manner.
Also the name `CustomAutoRooterGuard` is quite lengthy, so I'm also open to changing it (`AutoRoot`? `AutoRootGuard`?)
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r? jdm
Moved the following functions from components/script/dom/bindings/interface.rs to a new file components/script/dom/bindings/htmlconstructor.rs:
- html_constructor()
- get_constructor_object_from_local_name()
- pop_current_element_queue()
- push_new_element_queue()
---
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Source-Revision: 07fd6155aae8579f1a30ea99af3549c413240f24
--HG--
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…fault values
The generated bindings for an interface like this:
```webidl
void someFunction(Foo foo, optional long a = 0, optional long b = 1);
void someFunction(Bar bar, optional long a = 0);
```
are failing to build with an error like:
```bash
error[E0425]: cannot find function `Throw` in this scope
--> /Users/ferjm/dev/mozilla/servo/target/debug/build/script-7b1a12ddd08207e3/out/Bindings/TestBindingBinding.rs:15395:24
|
15395 | return Throw(cx, NS_ERROR_XPC_BAD_CONVERT_JS);
| ^^^^^ not found in this scope
error[E0425]: cannot find value `NS_ERROR_XPC_BAD_CONVERT_JS` in this scope
--> /Users/ferjm/dev/mozilla/servo/target/debug/build/script-7b1a12ddd08207e3/out/Bindings/TestBindingBinding.rs:15395:34
|
15395 | return Throw(cx, NS_ERROR_XPC_BAD_CONVERT_JS);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `Throw` in this scope
--> /Users/ferjm/dev/mozilla/servo/target/debug/build/script-7b1a12ddd08207e3/out/Bindings/TestBindingBinding.rs:15468:24
|
15468 | return Throw(cx, NS_ERROR_XPC_BAD_CONVERT_JS);
| ^^^^^ not found in this scope
error[E0425]: cannot find value `NS_ERROR_XPC_BAD_CONVERT_JS` in this scope
--> /Users/ferjm/dev/mozilla/servo/target/debug/build/script-7b1a12ddd08207e3/out/Bindings/TestBindingBinding.rs:15468:34
|
15468 | return Throw(cx, NS_ERROR_XPC_BAD_CONVERT_JS);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope
error: aborting due to 4 previous errors
error: Could not compile `script`.
```
- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] There are tests for these changes
** Note that this depends** on https://github.com/servo/rust-mozjs/pull/379
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Source-Revision: 9d055522d355b711c7837ba5997089ba8a7641ae
--HG--
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Relands #19133, as it was backed out wrongly in #19143.
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--HG--
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See #18809
Still haven't had time to test it but it should fix the tests failures that appeared in m-c
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<!-- Please describe your changes on the following line: -->
I found that some const WebIDL values fail at rust compile time.
Example:
const long long TIMEOUT_IGNORED = -1;
```
906 | ConstantSpec { name: b"TIMEOUT_IGNORED\0", value: ConstantVal::DoubleVal(-1) }]
| ^^ expected f64, found integral variable
|
= note: expected type `f64`
found type `{integer}`
```
I added a explicit cast to to fix the problem in conversions that may fail to compile.
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It still needs dependencies update to remove all the other bitflags
versions.
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- [x] These changes do not require tests because it's a dependency update
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Servo currently uses `heapsize`, but Stylo/Gecko use `malloc_size_of`.
`malloc_size_of` is better -- it handles various cases that `heapsize` does not
-- so this patch changes Servo to use `malloc_size_of`.
This patch makes the following changes to the `malloc_size_of` crate.
- Adds `MallocSizeOf` trait implementations for numerous types, some built-in
(e.g. `VecDeque`), some external and Servo-only (e.g. `string_cache`).
- Makes `enclosing_size_of_op` optional, because vanilla jemalloc doesn't
support that operation.
- For `HashSet`/`HashMap`, falls back to a computed estimate when
`enclosing_size_of_op` isn't available.
- Adds an extern "C" `malloc_size_of` function that does the actual heap
measurement; this is based on the same functions from the `heapsize` crate.
This patch makes the following changes elsewhere.
- Converts all the uses of `heapsize` to instead use `malloc_size_of`.
- Disables the "heapsize"/"heap_size" feature for the external crates that
provide it.
- Removes the `HeapSizeOf` implementation from `hashglobe`.
- Adds `ignore` annotations to a few `Rc`/`Arc`, because `malloc_size_of`
doesn't derive those types, unlike `heapsize`.
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Problems:
* the Heap::new constructor is memory-unsafe with any value other than Undefined/Null
* this means that moving dictionaries containing Heap values (ie. any/object) is memory-unsafe
* unions containing GC pointers are similarly unsafe
Solutions:
- dictionaries containing GC pointers are now wrapped in RootedTraceableBox (even inside other dictionaries)
- instead of using Heap::new, dictionaries containing GC pointers are now initialized to a default value (by deriving Default) and mutated one field at a time
- dictionaries containing GC pointers are marked #[must_root]
- FromJSVal for dictionaries containing GC pointers now returns RootedTraceableBox<Dictionary>
- unions wrap their variants that require rooting in RootedTraceableBox
Rather than attempting to derive Default for all dictionaries, we only do so for the dictionaries that require it. Because some dictionaries that require it inherit from dictionaries that do not, we need to write manual implementations for those parent dictionaries. This is a better option than having to figure out a default value for types like `Root<T>`, which would be required for deriving Default for all dictionaries.
I would still like to come up with an automated test for this, but I figured I would get eyes on this first.
---
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--HG--
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extra : subtree_revision : cb755f811ab9619a5711a1df38ddb440f2ce6a06
The elephant 🐘 (not PHP's) still remains in the room: `Rc<Promise>` shouldn't require `#[allow(unrooted_must_root)]`.
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--HG--
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On top of #18539, fixes#10686.
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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
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--HG--
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Relies on #17614
---
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spec: https://html.spec.whatwg.org/multipage/#htmlconstructor
---
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Renamed `script::dom::BrowsingContext` to `script::dom::WindowProxy`.
The browsing context is mostly maintained in the constellation, not in script. It would be nice to rename `constellation::Frame` to `constellation::BrowsingContext`, but that will be very confusing if there are two `BrowsingContext` types.
---
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--HG--
rename : servo/components/script/dom/browsingcontext.rs => servo/components/script/dom/windowproxy.rs
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : b6982ad56bf64ced344baceb66c9728e6dad6e6d
This removes six separate warnings when building servo. One of
the warnings was an unused mut, and the other were various dead code
warnings
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r? @jdm
issue https://github.com/servo/servo/issues/15252
The primary goal of this PR is to add add a generic trait method that returns a void ptr.
In addition to that change, I made the casting explicit in `components/script/dom/bindings/callback.rs` and `components/script/dom/promise.rs`. I did not use the new trait method because `AddRawValueRoot` is not looking for a `c_void`. It's looking for `std::os::raw::c_char`.
```rust
pub fn AddRawValueRoot(cx: *mut JSContext, vp: *mut Value,
name: *const ::std::os::raw::c_char) -> bool;
```
So I replace the `as *const _ ` with a more specific cast.
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This seems like code cleanup. It shouldn't change behaviour.
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Eliminate a mem::transmute in CodeGen by changing the find_enum_string_index function to take a slice of pairs and return an enum value.
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This PR adds an `as_str()` method to WebIDL enums to hide slice of strings from callers. It uses the new method in two places. It also eliminates a to_string() call that seemed unnecessary to me.
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This implements the [Permissions API](https://w3c.github.io/permissions/) spec.
Also includes the WebBluetooth related implementation for this.
There are some know issues:
- [ ] If the descriptor name is invalid [this](https://gist.github.com/dati91/7a6a0a563d90f49ba5a351e48c5b626b#file-permissionstatusbindings-rs-L323) will throw an error, rather that return it and we could handle it.
- [x] The [environment settings object](https://html.spec.whatwg.org/multipage/webappapis.html#environment-settings-object) is not implemented in servo and the spec rely on it.
- [x] There is a popup in the implementation which prevent us to add wpt test, we should figure out a way to make it work
- [ ] The allowedDevice's allowed_services attribute is not used in our implementation, because we store these in the lower level, not in the dom side.
- [ ] We think the bluetooth revoke function will need some more work, but the problem is the spec needs clarifications on that part.
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Note that this relies on the fact that Heap<JSVal> and JSVal are binary
compatible.
Fixes#15324.
Source-Repo: https://github.com/servo/servo
Source-Revision: 4524bb2bda02e6cf84347ef5a152c9c242d95408
It’s a compiler plugin that uses unstable compiler APIs that are not on a path to stabilization.
With this changes, there is one less thing that might break when we update the compiler. For example: https://github.com/sfackler/rust-phf/pull/101
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This replicates the same model that Promise uses right now, because it requires less thinking than coming up with something else.
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Source-Revision: e891277dd5a52bc3a2b76dfd78da9b82b4c11b40
