diff options
Diffstat (limited to 'gfx/wr/wr_malloc_size_of')
| -rw-r--r-- | gfx/wr/wr_malloc_size_of/Cargo.toml | 14 | ||||
| -rw-r--r-- | gfx/wr/wr_malloc_size_of/LICENSE-APACHE | 201 | ||||
| -rw-r--r-- | gfx/wr/wr_malloc_size_of/LICENSE-MIT | 23 | ||||
| -rw-r--r-- | gfx/wr/wr_malloc_size_of/lib.rs | 451 |
4 files changed, 689 insertions, 0 deletions
diff --git a/gfx/wr/wr_malloc_size_of/Cargo.toml b/gfx/wr/wr_malloc_size_of/Cargo.toml new file mode 100644 index 0000000000..d5e5f0d10c --- /dev/null +++ b/gfx/wr/wr_malloc_size_of/Cargo.toml @@ -0,0 +1,14 @@ +[package] +authors = ["The Servo Project Developers"] +description = "Internal utility to measure memory usage in WebRender." +name = "wr_malloc_size_of" +version = "0.0.2" +license = "MIT/Apache-2.0" +edition = "2018" + +[lib] +path = "lib.rs" + +[dependencies] +app_units = "0.7" +euclid = "0.22" diff --git a/gfx/wr/wr_malloc_size_of/LICENSE-APACHE b/gfx/wr/wr_malloc_size_of/LICENSE-APACHE new file mode 100644 index 0000000000..16fe87b06e --- /dev/null +++ b/gfx/wr/wr_malloc_size_of/LICENSE-APACHE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. 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IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/gfx/wr/wr_malloc_size_of/lib.rs b/gfx/wr/wr_malloc_size_of/lib.rs new file mode 100644 index 0000000000..ed432e2a50 --- /dev/null +++ b/gfx/wr/wr_malloc_size_of/lib.rs @@ -0,0 +1,451 @@ +// Copyright 2016-2017 The Servo Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or +// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license +// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +//! A reduced fork of Firefox's malloc_size_of crate, for bundling with WebRender. + +extern crate app_units; +extern crate euclid; + +use std::hash::{BuildHasher, Hash}; +use std::mem::size_of; +use std::ops::Range; +use std::os::raw::c_void; +use std::path::PathBuf; + +/// A C function that takes a pointer to a heap allocation and returns its size. +type VoidPtrToSizeFn = unsafe extern "C" fn(ptr: *const c_void) -> usize; + +/// Operations used when measuring heap usage of data structures. +pub struct MallocSizeOfOps { + /// A function that returns the size of a heap allocation. + pub size_of_op: VoidPtrToSizeFn, + + /// Like `size_of_op`, but can take an interior pointer. Optional because + /// not all allocators support this operation. If it's not provided, some + /// memory measurements will actually be computed estimates rather than + /// real and accurate measurements. + pub enclosing_size_of_op: Option<VoidPtrToSizeFn>, +} + +impl MallocSizeOfOps { + pub fn new( + size_of: VoidPtrToSizeFn, + malloc_enclosing_size_of: Option<VoidPtrToSizeFn>, + ) -> Self { + MallocSizeOfOps { + size_of_op: size_of, + enclosing_size_of_op: malloc_enclosing_size_of, + } + } + + /// Check if an allocation is empty. This relies on knowledge of how Rust + /// handles empty allocations, which may change in the future. + fn is_empty<T: ?Sized>(ptr: *const T) -> bool { + // The correct condition is this: + // `ptr as usize <= ::std::mem::align_of::<T>()` + // But we can't call align_of() on a ?Sized T. So we approximate it + // with the following. 256 is large enough that it should always be + // larger than the required alignment, but small enough that it is + // always in the first page of memory and therefore not a legitimate + // address. + ptr as *const usize as usize <= 256 + } + + /// Call `size_of_op` on `ptr`, first checking that the allocation isn't + /// empty, because some types (such as `Vec`) utilize empty allocations. + pub unsafe fn malloc_size_of<T: ?Sized>(&self, ptr: *const T) -> usize { + if MallocSizeOfOps::is_empty(ptr) { + 0 + } else { + (self.size_of_op)(ptr as *const c_void) + } + } + + /// Is an `enclosing_size_of_op` available? + pub fn has_malloc_enclosing_size_of(&self) -> bool { + self.enclosing_size_of_op.is_some() + } + + /// Call `enclosing_size_of_op`, which must be available, on `ptr`, which + /// must not be empty. + pub unsafe fn malloc_enclosing_size_of<T>(&self, ptr: *const T) -> usize { + assert!(!MallocSizeOfOps::is_empty(ptr)); + (self.enclosing_size_of_op.unwrap())(ptr as *const c_void) + } +} + +/// Trait for measuring the "deep" heap usage of a data structure. This is the +/// most commonly-used of the traits. +pub trait MallocSizeOf { + /// Measure the heap usage of all descendant heap-allocated structures, but + /// not the space taken up by the value itself. + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize; +} + +/// Trait for measuring the "shallow" heap usage of a container. +pub trait MallocShallowSizeOf { + /// Measure the heap usage of immediate heap-allocated descendant + /// structures, but not the space taken up by the value itself. Anything + /// beyond the immediate descendants must be measured separately, using + /// iteration. + fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize; +} + +impl MallocSizeOf for String { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + unsafe { ops.malloc_size_of(self.as_ptr()) } + } +} + +impl<T: ?Sized> MallocShallowSizeOf for Box<T> { + fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + unsafe { ops.malloc_size_of(&**self) } + } +} + +impl<T: MallocSizeOf + ?Sized> MallocSizeOf for Box<T> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.shallow_size_of(ops) + (**self).size_of(ops) + } +} + +impl MallocSizeOf for () { + fn size_of(&self, _ops: &mut MallocSizeOfOps) -> usize { + 0 + } +} + +impl<T1, T2> MallocSizeOf for (T1, T2) +where + T1: MallocSizeOf, + T2: MallocSizeOf, +{ + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.0.size_of(ops) + self.1.size_of(ops) + } +} + +impl<T1, T2, T3> MallocSizeOf for (T1, T2, T3) +where + T1: MallocSizeOf, + T2: MallocSizeOf, + T3: MallocSizeOf, +{ + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.0.size_of(ops) + self.1.size_of(ops) + self.2.size_of(ops) + } +} + +impl<T1, T2, T3, T4> MallocSizeOf for (T1, T2, T3, T4) +where + T1: MallocSizeOf, + T2: MallocSizeOf, + T3: MallocSizeOf, + T4: MallocSizeOf, +{ + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.0.size_of(ops) + self.1.size_of(ops) + self.2.size_of(ops) + self.3.size_of(ops) + } +} + +impl<T: MallocSizeOf> MallocSizeOf for Option<T> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + if let Some(val) = self.as_ref() { + val.size_of(ops) + } else { + 0 + } + } +} + +impl<T: MallocSizeOf, E: MallocSizeOf> MallocSizeOf for Result<T, E> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + match *self { + Ok(ref x) => x.size_of(ops), + Err(ref e) => e.size_of(ops), + } + } +} + +impl<T: MallocSizeOf + Copy> MallocSizeOf for std::cell::Cell<T> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.get().size_of(ops) + } +} + +impl<T: MallocSizeOf> MallocSizeOf for std::cell::RefCell<T> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.borrow().size_of(ops) + } +} + +impl<'a, B: ?Sized + ToOwned> MallocSizeOf for std::borrow::Cow<'a, B> +where + B::Owned: MallocSizeOf, +{ + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + match *self { + std::borrow::Cow::Borrowed(_) => 0, + std::borrow::Cow::Owned(ref b) => b.size_of(ops), + } + } +} + +impl<T: MallocSizeOf> MallocSizeOf for [T] { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + let mut n = 0; + for elem in self.iter() { + n += elem.size_of(ops); + } + n + } +} + +impl<T> MallocShallowSizeOf for Vec<T> { + fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + unsafe { ops.malloc_size_of(self.as_ptr()) } + } +} + +impl<T: MallocSizeOf> MallocSizeOf for Vec<T> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + let mut n = self.shallow_size_of(ops); + for elem in self.iter() { + n += elem.size_of(ops); + } + n + } +} + +macro_rules! malloc_size_of_hash_set { + ($ty:ty) => { + impl<T, S> MallocShallowSizeOf for $ty + where + T: Eq + Hash, + S: BuildHasher, + { + fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + if ops.has_malloc_enclosing_size_of() { + // The first value from the iterator gives us an interior pointer. + // `ops.malloc_enclosing_size_of()` then gives us the storage size. + // This assumes that the `HashSet`'s contents (values and hashes) + // are all stored in a single contiguous heap allocation. + self.iter() + .next() + .map_or(0, |t| unsafe { ops.malloc_enclosing_size_of(t) }) + } else { + // An estimate. + self.capacity() * (size_of::<T>() + size_of::<usize>()) + } + } + } + + impl<T, S> MallocSizeOf for $ty + where + T: Eq + Hash + MallocSizeOf, + S: BuildHasher, + { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + let mut n = self.shallow_size_of(ops); + for t in self.iter() { + n += t.size_of(ops); + } + n + } + } + }; +} + +malloc_size_of_hash_set!(std::collections::HashSet<T, S>); + +macro_rules! malloc_size_of_hash_map { + ($ty:ty) => { + impl<K, V, S> MallocShallowSizeOf for $ty + where + K: Eq + Hash, + S: BuildHasher, + { + fn shallow_size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + // See the implementation for std::collections::HashSet for details. + if ops.has_malloc_enclosing_size_of() { + self.values() + .next() + .map_or(0, |v| unsafe { ops.malloc_enclosing_size_of(v) }) + } else { + self.capacity() * (size_of::<V>() + size_of::<K>() + size_of::<usize>()) + } + } + } + + impl<K, V, S> MallocSizeOf for $ty + where + K: Eq + Hash + MallocSizeOf, + V: MallocSizeOf, + S: BuildHasher, + { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + let mut n = self.shallow_size_of(ops); + for (k, v) in self.iter() { + n += k.size_of(ops); + n += v.size_of(ops); + } + n + } + } + }; +} + +malloc_size_of_hash_map!(std::collections::HashMap<K, V, S>); + +// PhantomData is always 0. +impl<T> MallocSizeOf for std::marker::PhantomData<T> { + fn size_of(&self, _ops: &mut MallocSizeOfOps) -> usize { + 0 + } +} + +impl MallocSizeOf for PathBuf { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + match self.to_str() { + Some(s) => unsafe { ops.malloc_size_of(s.as_ptr()) }, + None => self.as_os_str().len(), + } + } +} + +impl<T: MallocSizeOf, Unit> MallocSizeOf for euclid::Length<T, Unit> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.0.size_of(ops) + } +} + +impl<T: MallocSizeOf, Src, Dst> MallocSizeOf for euclid::Scale<T, Src, Dst> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.0.size_of(ops) + } +} + +impl<T: MallocSizeOf, U> MallocSizeOf for euclid::Point2D<T, U> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.x.size_of(ops) + self.y.size_of(ops) + } +} + +impl<T: MallocSizeOf, U> MallocSizeOf for euclid::Rect<T, U> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.origin.size_of(ops) + self.size.size_of(ops) + } +} + +impl<T: MallocSizeOf, U> MallocSizeOf for euclid::Box2D<T, U> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.min.size_of(ops) + self.max.size_of(ops) + } +} + +impl<T: MallocSizeOf, U> MallocSizeOf for euclid::SideOffsets2D<T, U> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.top.size_of(ops) + + self.right.size_of(ops) + + self.bottom.size_of(ops) + + self.left.size_of(ops) + } +} + +impl<T: MallocSizeOf, U> MallocSizeOf for euclid::Size2D<T, U> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.width.size_of(ops) + self.height.size_of(ops) + } +} + +impl<T: MallocSizeOf, Src, Dst> MallocSizeOf for euclid::Transform2D<T, Src, Dst> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.m11.size_of(ops) + + self.m12.size_of(ops) + + self.m21.size_of(ops) + + self.m22.size_of(ops) + + self.m31.size_of(ops) + + self.m32.size_of(ops) + } +} + +impl<T: MallocSizeOf, Src, Dst> MallocSizeOf for euclid::Transform3D<T, Src, Dst> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.m11.size_of(ops) + + self.m12.size_of(ops) + + self.m13.size_of(ops) + + self.m14.size_of(ops) + + self.m21.size_of(ops) + + self.m22.size_of(ops) + + self.m23.size_of(ops) + + self.m24.size_of(ops) + + self.m31.size_of(ops) + + self.m32.size_of(ops) + + self.m33.size_of(ops) + + self.m34.size_of(ops) + + self.m41.size_of(ops) + + self.m42.size_of(ops) + + self.m43.size_of(ops) + + self.m44.size_of(ops) + } +} + +impl<T: MallocSizeOf, U> MallocSizeOf for euclid::Vector2D<T, U> { + fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { + self.x.size_of(ops) + self.y.size_of(ops) + } +} + +/// For use on types where size_of() returns 0. +#[macro_export] +macro_rules! malloc_size_of_is_0( + ($($ty:ty),+) => ( + $( + impl $crate::MallocSizeOf for $ty { + #[inline(always)] + fn size_of(&self, _: &mut $crate::MallocSizeOfOps) -> usize { + 0 + } + } + )+ + ); + ($($ty:ident<$($gen:ident),+>),+) => ( + $( + impl<$($gen: $crate::MallocSizeOf),+> $crate::MallocSizeOf for $ty<$($gen),+> { + #[inline(always)] + fn size_of(&self, _: &mut $crate::MallocSizeOfOps) -> usize { + 0 + } + } + )+ + ); +); + +malloc_size_of_is_0!(bool, char, str); +malloc_size_of_is_0!(u8, u16, u32, u64, u128, usize); +malloc_size_of_is_0!(i8, i16, i32, i64, i128, isize); +malloc_size_of_is_0!(f32, f64); + +malloc_size_of_is_0!(std::sync::atomic::AtomicBool); +malloc_size_of_is_0!(std::sync::atomic::AtomicIsize); +malloc_size_of_is_0!(std::sync::atomic::AtomicUsize); + +malloc_size_of_is_0!(std::num::NonZeroUsize); +malloc_size_of_is_0!(std::num::NonZeroU32); + +malloc_size_of_is_0!(std::time::Duration); +malloc_size_of_is_0!(std::time::Instant); +malloc_size_of_is_0!(std::time::SystemTime); + +malloc_size_of_is_0!(Range<u8>, Range<u16>, Range<u32>, Range<u64>, Range<usize>); +malloc_size_of_is_0!(Range<i8>, Range<i16>, Range<i32>, Range<i64>, Range<isize>); +malloc_size_of_is_0!(Range<f32>, Range<f64>); + +malloc_size_of_is_0!(app_units::Au); |