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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`.
33 lines
1.3 KiB
Rust
33 lines
1.3 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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//! Routines for handling measuring the memory usage of arbitrary DOM nodes.
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use dom::bindings::conversions::get_dom_class;
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use dom::bindings::reflector::DomObject;
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use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
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use std::os::raw::c_void;
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// This is equivalent to measuring a Box<T>, except that DOM objects lose their
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// associated box in order to stash their pointers in a reserved slot of their
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// JS reflector.
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#[allow(unsafe_code)]
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pub fn malloc_size_of_including_self<T: DomObject + MallocSizeOf>(
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ops: &mut MallocSizeOfOps, obj: &T) -> usize
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{
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unsafe {
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let class = get_dom_class(obj.reflector().get_jsobject().get()).unwrap();
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(class.malloc_size_of)(ops, obj as *const T as *const c_void)
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}
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}
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/// Used by codegen to include the pointer to the `MallocSizeOf` implementation of each
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/// IDL interface. This way we don't have to find the most-derived interface of DOM
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/// objects by hand in code.
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#[allow(unsafe_code)]
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pub unsafe fn malloc_size_of_including_raw_self<T: MallocSizeOf>(
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ops: &mut MallocSizeOfOps, obj: *const c_void) -> usize
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{
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ops.malloc_size_of(obj) + (*(obj as *const T)).size_of(ops)
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}
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