Review of documentation that was missing needed.
Fixes#8833.
Source-Repo: https://github.com/servo/servo
Source-Revision: 7438bc0425749989b8aab084a34ff3fff2ea6679
Alright, this is it. Finally the fix for #3396. :D
I'll add two comments via reviewable in a second.
Source-Repo: https://github.com/servo/servo
Source-Revision: df81cd7ce9de4823ad966f873639ed06ca368e4c
This is an rough solution to the issue described in #3396. XHRs still do their own thing and an overall clean up is in order. Before I do that, though, I'd really like someone to sign off on the overall idea.
There's one major difference to what jdm layed out #3396: The timers remain with the window/worker and only the earliest expiring one is coordinated with the dedicated timer thread.
That means both the timer thread and the window/worker have to keep track of which timer expires next, which feels a bit wonky. However, the upshot is that there's no need for communication with the timer thread when a pipeline is frozen, thawed or dropped.
Most relvant parts are
- the [`TimerScheduler`](6f5f661958 (diff-74137a6f50ab38e7a1e4d16920a66ce7R73)), which is the new per-constellation timer task and
- the [`ActiveTimers`](6f5f661958 (diff-86707d952414a2860b78bcf6c1db8e2eR34)) which is what's left on the window/worker side.
Source-Repo: https://github.com/servo/servo
Source-Revision: 2de5407cdabef67ed03b2ad4edf4a22541d77875
This is a direct extract from my abandoned PR for a lint (#7546), along with some rather clumsy modifications (only on `components/script/dom/mod.rs` and `components/style/lib.rs`), because I had to sort some of the files again to make peace with tidy, which hasn't been educated about sorting yet!
Source-Repo: https://github.com/servo/servo
Source-Revision: a7208869f2903e36f9b2f540b55b50283d7df466
Elided almost all the lifetimes and removed needless returns. Mostly done by sed + manual fixes.
r? @nox
Source-Repo: https://github.com/servo/servo
Source-Revision: c2c2646d37614ece5869af861993c3d619f6e003
Now that `JSRef<T>` is gone, there is no need to have helper traits.
Source-Repo: https://github.com/servo/servo
Source-Revision: 909429702972d53bf02dfe9a4aa93ea0cb588cf4
Expands on the work by @wilmoz and cleans up the existing errors. Closes#7180. Closes#7111.
Source-Repo: https://github.com/servo/servo
Source-Revision: e74825f9fde8e222f4ba9bb24b2c2a3864c73e5f
... for #3734, which is also one of the oldest issues. (/cc @jdm)
Source-Repo: https://github.com/servo/servo
Source-Revision: 6a52ec94840fbaf43a29d76879e2b59542a9963d
Also adds HeapSizeOf implementations/derive for some types. I've used "Cannot calculate Heap size" as a reason everywhere, because my imagination is rather limited. If you'd like me to change this message for specific types, please write something like this: "Trusted - Cannot calculate Heap size for Trusted" so that it would be easier for me to replace them through a script :)
Source-Repo: https://github.com/servo/servo
Source-Revision: a03616f379c255cc6c9b6e1d04dd7d98bd9926ce
For now, this just gives some purpose to the abandoned receiver and later selects over the two receivers (for #6767). (oh wait, forgot to check the local build - there are still a few errors)...
Source-Repo: https://github.com/servo/servo
Source-Revision: effb17b3368769baaf5247908b26b7f0dd370ea3
This change makes Servo use serialized messages over IPC channels for resource loading. The goal is to make it easier to make Servo multiprocess in the future. This patch does not make Servo multiprocess now; there are many other channels that need to be changed to IPC before that can happen. It does introduce a dependency on https://github.com/serde-rs/serde and https://github.com/pcwalton/ipc-channel for the first time.
At the moment, `ipc-channel` uses JSON for serialization. This is because serde does not yet have official support for bincode. When serde gains support for bincode, I'll switch to that. For now, however, the JSON encoding and decoding will constitute a significant performance regression in resource loading.
To avoid having to send boxed `AsyncResponseTarget` trait objects across process boundaries, this series of commits changes `AsyncResponseTarget` to wrap a sender only. It is then the client's responsibility to spawn a thread to proxy calls from that sender to the consumer of the resource data. This only had to be done in a few places. In the future, we may want to collapse those threads into one per process to reduce overhead. (It is impossible to continue to use `AsyncResponseTarget` as a boxed trait object across processes, regardless of how much work is done on `ipc-channel`. Vtables are fundamentally incompatible with IPC across mutually untrusting processes.)
In general, I was pretty pleased with how this turned out. The main changes are adding serialization functionality to various objects that `serde` does not know how to serialize natively—the most complicated being Hyper objects—and reworking `AsyncResponseTarget`. The overall structure of the code is unchanged, and other than `AsyncResponseTarget` no functionality was lost in moving to serialization and IPC.
r? @jdm
Source-Repo: https://github.com/servo/servo
Source-Revision: 2eb122f394651232abd683fc576a5c4288bf277f
To actually make the multiprocess communication work, we'll need to
reroute the task creation to the pipeline or the compositor. But this
works as a first step.
r? @jdm
Source-Repo: https://github.com/servo/servo
Source-Revision: 1764267379a00b96a1df89f3917299a0c6fd325c
SpiderMonkey provides an extremely fine-grained breakdown of memory
usage, but for Servo we aggregate the measurements into a small number
of coarse buckets, which seems appropriate for the current level of
detail provided by Servo's memory profiler. Sample output:
```
| 17.41 MiB -- url(file:///home/njn/moz/servo/../servo-static-suite/wikipedia/Guardians%20of%20the%20Galaxy%20(film)%20-%20Wikipedia,%20the%20free%20encyclopedia.html)
| 7.32 MiB -- js
| 3.07 MiB -- malloc-heap
| 3.00 MiB -- gc-heap
| 2.48 MiB -- used
| 0.34 MiB -- decommitted
| 0.09 MiB -- unused
| 0.09 MiB -- admin
| 1.25 MiB -- non-heap
```
Most of the changes are plumbing to get the script task communicating
with the memory profiler task.
Source-Repo: https://github.com/servo/servo
Source-Revision: 2b0bdbe1c195f2f6dd7671981999d622c505fbc5
fixes#6524. I had to make an additional change not mentioned in the ticket - adding the `#[feature]` to enable deriving custom traits but I assume that's expected at this time.
Source-Repo: https://github.com/servo/servo
Source-Revision: bbb39082e0f640400546d2084a450a8675820a82
> Here it is.
>
> ~~There's two major things that are unfinished here:~~
> - ~~Dealing with the unroot_must_root lint. I'm not sure about the value of this lint with the new rooting API.~~ Done.
> - ~~Updating the Cargo.locks to point to the new SM and SM binding.~~ Done.
>
> I also included my fixes for the rust update, but these will disappear in a rebase. A rust update is necessary to support calling `Drop` on `Heap<T>` correctly when `Heap<T>` is inside a `Rc<T>`. Otherwise `&self` points to the wrong location.
>
> Incremental GC is disabled here. I'm not sure how to deal with the incremental barriers so that's left for later.
>
> Generational GC works. SM doesn't work without it.
>
> The biggest change here is to the rooting API. `Root` was made movable, and `Temporary` and `JSRef` was removed. Movable `Root`s means there's no need for `Temporary`, and `JSRef`s aren't needed generally since it can be assumed that being able to obtain a reference to a dom object means it's already rooted. References have their lifetime bound to the Roots that provided them. DOM objects that haven't passed through `reflect_dom_object` don't need to be rooted, and DOM objects that have passed through `reflect_dom_object` can't be obtained without being rooted through `native_from_reflector_jsmanaged` or `JS::<T>::root()`.
>
> Support for `Heap<T>` ended up messier than I expected. It's split into two commits, but only because it's a bit difficult to fold them together. Supporting `Heap<T>` properly requires that that `Heap::<T>::set()` be called on something that won't move. I removed the Copy and Clone trait from `Heap<T>` so `Cell` can't hold `Heap<T>` - only `UnsafeCell` can hold it.
>
> `CallbackObject` is a bit tricky - I moved all callbacks into `Rc<T>` in order to make sure that the pointer inside to a `*mut JSObject` doesn't move. This is necessary for supporting `Heap<T>`.
>
> `RootedCollectionSet` is very general purpose now. Anything with `JSTraceable` can be rooted by `RootedCollectionSet`/`RootedTraceable`. Right now, `RootedTraceable` is only used to hold down dom objects before they're fully attached to their reflector. I had to make a custom mechanism to dispatch the trace call - couldn't figure out how to get trait objects working for this case.
>
> This has been tested with the following zeal settings:
>
> GC after every allocation
> JS_GC_ZEAL=2,1
>
> GC after every 100 allocations (important for catching use-after-free bugs)
> JS_GC_ZEAL=2,100
>
> Verify pre barriers
> JS_GC_ZEAL=4,1
>
> Verify post barriers
> JS_GC_ZEAL=11,1
Source-Repo: https://github.com/servo/servo
Source-Revision: e7808c526c348fea5e3b48af70b7f1a066652097
This implements a simple load-tracking system and tracks stylesheet loads as an example of how it fits together. This is a simplified and rebased version of #3714; I do not believe that the main thrust of hsivonen's comments (related to tracking navigation in browsing contexts) affect this part of the work.
r? @Ms2ger
Source-Repo: https://github.com/servo/servo
Source-Revision: 2baa69595e2d57213c34b7e168b60885948fa85b
fixes#5724, #5737
uses https://github.com/Manishearth/rust-tenacious (can be moved in-tree if needed)
I can make it `Deny` by default too (I'll add a cargo feature to tenacious), though we might want it on
`Warn` until we get some mileage on it.
Source-Repo: https://github.com/servo/servo
Source-Revision: d7987e43c944eb9b156bf3244c08fce4cb570db4
This implements a framework for opting in to receiving network events asynchronously. It also converts XMLHttpRequest to use them, and paves the way for better support for synchronous XHR using on-demand, targeted event loops instead of spinning the global event loop. This gives us complete feature parity with the existing XHR implementation, using fewer threads than before in the async case.
Source-Repo: https://github.com/servo/servo
Source-Revision: 3151497d498b001b4a783dce0595615c6fc40936
The notification for new globals now works for nested workers too (refs #5309)
Source-Repo: https://github.com/servo/servo
Source-Revision: a277036dd9b461c434261b4ba5e88bc228c8a0dd
This is for #4704. I'm not sure if this is the best approach, so I'm open to suggestions.
Source-Repo: https://github.com/servo/servo
Source-Revision: 439e3150d74453b86abbcc7934b7e5152f102940
This is a start towards fixing #3868. Not all callers have been fixed yet, so the `Deref` implementation remains for now.
Source-Repo: https://github.com/servo/servo
Source-Revision: 141b5d038fad3c0c44a6f1b309b8ca9edea54580
This replaces the specialized TrustedXHRAddress and TrustedWorkerAddress code that was used for the same purpose. A non-zero refcount pins the given DOM object's reflector and prevents it from being GCed even when there are no other outstanding references visible to SpiderMonkey. This will enable us to implement asynchronous operations that refer to particular DOM objects (such as "queue a task to fire a simple event named load at the iframe element" from the spec) safely and conveniently, and paves the way for things like asynchronous network responses.
Some concerns about the resulting size of XHR progress messages have been expressed, but I believe optimizations to reduce that can be implemented in subsequent PRs.
r? @Ms2ger - note in particular the changes to the worker lifetime code. I couldn't figure out how to achieve an identical lifetime to the previous addref/release pairing, and I also was having trouble figuring out why the existing setup was safe. The new implementation now holds the main script task Worker object alive via the TrustedWorkerAddress field in the dedicated worker global scope, which is a significant difference.
Source-Repo: https://github.com/servo/servo
Source-Revision: 2c259f477c41331e66beab8bda865971982a1ff4
