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https://github.com/servo/servo.git
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4506f0d30c
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`.
87 lines
2.5 KiB
Rust
87 lines
2.5 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 http://mozilla.org/MPL/2.0/. */
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#![allow(unrooted_must_root)]
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use dom::bindings::root::{Dom, DomRoot};
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use dom::bindings::trace::JSTraceable;
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use dom::document::Document;
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use dom::htmlscriptelement::HTMLScriptElement;
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use dom::node::Node;
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use dom::servoparser::Sink;
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use js::jsapi::JSTracer;
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use servo_url::ServoUrl;
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use xml5ever::buffer_queue::BufferQueue;
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use xml5ever::tokenizer::XmlTokenizer;
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use xml5ever::tree_builder::{Tracer as XmlTracer, XmlTreeBuilder};
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#[derive(JSTraceable, MallocSizeOf)]
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#[must_root]
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pub struct Tokenizer {
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#[ignore_malloc_size_of = "Defined in xml5ever"]
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inner: XmlTokenizer<XmlTreeBuilder<Dom<Node>, Sink>>,
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}
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impl Tokenizer {
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pub fn new(document: &Document, url: ServoUrl) -> Self {
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let sink = Sink {
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base_url: url,
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document: Dom::from_ref(document),
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current_line: 1,
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script: Default::default(),
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};
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let tb = XmlTreeBuilder::new(sink, Default::default());
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let tok = XmlTokenizer::new(tb, Default::default());
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Tokenizer {
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inner: tok,
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}
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}
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pub fn feed(&mut self, input: &mut BufferQueue) -> Result<(), DomRoot<HTMLScriptElement>> {
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if !input.is_empty() {
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while let Some(chunk) = input.pop_front() {
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self.inner.feed(chunk);
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if let Some(script) = self.inner.sink.sink.script.take() {
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return Err(script);
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}
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}
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} else {
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self.inner.run();
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if let Some(script) = self.inner.sink.sink.script.take() {
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return Err(script);
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}
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}
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Ok(())
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}
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pub fn end(&mut self) {
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self.inner.end()
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}
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pub fn url(&self) -> &ServoUrl {
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&self.inner.sink.sink.base_url
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}
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}
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#[allow(unsafe_code)]
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unsafe impl JSTraceable for XmlTokenizer<XmlTreeBuilder<Dom<Node>, Sink>> {
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unsafe fn trace(&self, trc: *mut JSTracer) {
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struct Tracer(*mut JSTracer);
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let tracer = Tracer(trc);
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impl XmlTracer for Tracer {
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type Handle = Dom<Node>;
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#[allow(unrooted_must_root)]
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fn trace_handle(&self, node: &Dom<Node>) {
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unsafe { node.trace(self.0); }
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}
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}
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let tree_builder = &self.sink;
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tree_builder.trace_handles(&tracer);
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tree_builder.sink.trace(trc);
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}
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}
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