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https://github.com/servo/servo.git
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139774e6b5
This patch exposes a servo internal DOM API that is only made available to about: pages on the navigator object to request memory reports. The about:memory page itself is loaded like other html resources (eg. bad cert, net error) and makes use of this new API. On the implementation side, notable changes: - components/script/routed_promise.rs abstracts the setup used to fulfill a promise when the work needs to be routed through the constellation. The goal is to migrate other similar promise APIs in followup (eg. dom/webgpu/gpu.rs, bluetooth.rs). - a new message is added to request a report from the memory reporter, and the memory reporter creates a json representation of the set of memory reports. - the post-processing of memory reports is done in Javascript in the about-memory.html page, providing the same results as the current Rust code that outputs to stdout. We can decide later if we want to remove the current output. Signed-off-by: webbeef <me@webbeef.org>
62 lines
2.1 KiB
Rust
62 lines
2.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use std::rc::Rc;
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use dom_struct::dom_struct;
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use profile_traits::mem::MemoryReportResult;
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use script_traits::ScriptMsg;
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use crate::dom::bindings::codegen::Bindings::ServoInternalsBinding::ServoInternalsMethods;
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use crate::dom::bindings::error::Error;
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use crate::dom::bindings::reflector::{DomGlobal, Reflector, reflect_dom_object};
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::globalscope::GlobalScope;
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use crate::dom::promise::Promise;
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use crate::realms::InRealm;
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use crate::routed_promise::{RoutedPromiseListener, route_promise};
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use crate::script_runtime::CanGc;
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#[dom_struct]
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pub(crate) struct ServoInternals {
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reflector_: Reflector,
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}
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impl ServoInternals {
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pub fn new_inherited() -> ServoInternals {
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ServoInternals {
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reflector_: Reflector::new(),
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}
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}
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pub(crate) fn new(global: &GlobalScope, can_gc: CanGc) -> DomRoot<ServoInternals> {
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reflect_dom_object(Box::new(ServoInternals::new_inherited()), global, can_gc)
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}
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}
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impl ServoInternalsMethods<crate::DomTypeHolder> for ServoInternals {
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/// <https://servo.org/internal-no-spec>
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fn ReportMemory(&self, comp: InRealm, can_gc: CanGc) -> Rc<Promise> {
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let global = &self.global();
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let promise = Promise::new_in_current_realm(comp, can_gc);
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let sender = route_promise(&promise, self);
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let script_to_constellation_chan = global.script_to_constellation_chan();
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if script_to_constellation_chan
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.send(ScriptMsg::ReportMemory(sender))
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.is_err()
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{
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promise.reject_error(Error::Operation, can_gc);
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}
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promise
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}
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}
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impl RoutedPromiseListener for ServoInternals {
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type Response = MemoryReportResult;
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#[cfg_attr(crown, allow(crown::unrooted_must_root))]
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fn handle_response(&self, response: Self::Response, promise: &Rc<Promise>, can_gc: CanGc) {
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promise.resolve_native(&response.content, can_gc);
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}
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}
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