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// Copyright 2015-2019 Parity Technologies (UK) Ltd. // This file is part of Parity. // Parity is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // Parity is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with Parity. If not, see <http://www.gnu.org/licenses/>. //! default allocator management //! Features are: //! - windows: //! - no features: default implementation from servo `heapsize` crate //! - weealloc: default to `estimate_size` //! - dlmalloc: default to `estimate_size` //! - jemalloc: default windows allocator is used instead //! - mimalloc: use mimallocator crate //! - arch x86: //! - no features: use default alloc //! - jemalloc: use jemallocator crate //! - weealloc: default to `estimate_size` //! - dlmalloc: default to `estimate_size` //! - mimalloc: use mimallocator crate //! - arch x86/macos: //! - no features: use default alloc, requires using `estimate_size` //! - jemalloc: use jemallocator crate //! - weealloc: default to `estimate_size` //! - dlmalloc: default to `estimate_size` //! - mimalloc: use mimallocator crate //! - arch wasm32: //! - no features: default to `estimate_size` //! - weealloc: default to `estimate_size` //! - dlmalloc: default to `estimate_size` //! - jemalloc: compile error //! - mimalloc: compile error (until https://github.com/microsoft/mimalloc/pull/32 is merged) #[cfg(feature = "std")] use crate::malloc_size::MallocUnconditionalSizeOf; use crate::malloc_size::{MallocSizeOf, MallocSizeOfOps, VoidPtrToSizeFn}; #[cfg(not(feature = "std"))] use core::ffi::c_void; #[cfg(feature = "std")] use std::os::raw::c_void; mod usable_size { use super::*; cfg_if::cfg_if! { if #[cfg(any( target_arch = "wasm32", feature = "estimate-heapsize", feature = "weealloc-global", feature = "dlmalloc-global", ))] { // do not try system allocator /// Warning this is for compatibility only. /// This function does panic: `estimate-heapsize` feature needs to be activated /// to avoid this function call. pub unsafe extern "C" fn malloc_usable_size(_ptr: *const c_void) -> usize { unreachable!("estimate heapsize only") } } else if #[cfg(target_os = "windows")] { use winapi::um::heapapi::{GetProcessHeap, HeapSize, HeapValidate}; /// Get the size of a heap block. /// Call windows allocator through `winapi` crate pub unsafe extern "C" fn malloc_usable_size(mut ptr: *const c_void) -> usize { let heap = GetProcessHeap(); if HeapValidate(heap, 0, ptr) == 0 { ptr = *(ptr as *const *const c_void).offset(-1); } HeapSize(heap, 0, ptr) as usize } } else if #[cfg(feature = "jemalloc-global")] { /// Use of jemalloc usable size C function through jemallocator crate call. pub unsafe extern "C" fn malloc_usable_size(ptr: *const c_void) -> usize { jemallocator::usable_size(ptr) } } else if #[cfg(feature = "mimalloc-global")] { /// Use of mimalloc usable size C function through mimalloc_sys crate call. pub unsafe extern "C" fn malloc_usable_size(ptr: *const c_void) -> usize { // mimalloc doesn't actually mutate the value ptr points to, // but requires a mut pointer in the API mimalloc_sys::mi_usable_size(ptr as *mut _) } } else if #[cfg(target_os = "linux")] { /// Linux call system allocator (currently malloc). extern "C" { pub fn malloc_usable_size(ptr: *const c_void) -> usize; } } else { // default allocator for non linux or windows system use estimate pub unsafe extern "C" fn malloc_usable_size(_ptr: *const c_void) -> usize { unreachable!("estimate heapsize or feature allocator needed") } } } /// No enclosing function defined. #[inline] pub fn new_enclosing_size_fn() -> Option<VoidPtrToSizeFn> { None } } /// Get a new instance of a MallocSizeOfOps pub fn new_malloc_size_ops() -> MallocSizeOfOps { MallocSizeOfOps::new(usable_size::malloc_usable_size, usable_size::new_enclosing_size_fn(), None) } /// Extension methods for `MallocSizeOf` trait, do not implement /// directly. /// It allows getting heapsize without exposing `MallocSizeOfOps` /// (a single default `MallocSizeOfOps` is used for each call). pub trait MallocSizeOfExt: MallocSizeOf { /// Method to launch a heapsize measurement with a /// fresh state. fn malloc_size_of(&self) -> usize { let mut ops = new_malloc_size_ops(); <Self as MallocSizeOf>::size_of(self, &mut ops) } } impl<T: MallocSizeOf> MallocSizeOfExt for T {} #[cfg(feature = "std")] impl<T: MallocSizeOf> MallocSizeOf for std::sync::Arc<T> { fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize { self.unconditional_size_of(ops) } }