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a007baa4cf
`jemallocator` and `jemallocator-sys` crates are same as the `tikv-*` versions and these aliases were maintained for historical reasons, based on crates.io documentation. For newer projects, it is recommended to use the `tikv-` versions of the crate. Even though Servo is not a new project, it makes sense to switch to the newer version for the sake of clarity. Also, more importantly, `tikv-jemallocator` has new release (0.6.0) which includes a fix for #32720. There doesn't seem to be a corresponding version publised for the `jemallocator` crate. Fixes #32720 Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
81 lines
2.3 KiB
Rust
81 lines
2.3 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 https://mozilla.org/MPL/2.0/. */
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//! Selecting the default global allocator for Servo
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#[global_allocator]
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static ALLOC: Allocator = Allocator;
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pub use crate::platform::*;
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#[cfg(not(any(windows, feature = "use-system-allocator", target_env = "ohos")))]
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mod platform {
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use std::os::raw::c_void;
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pub use tikv_jemallocator::Jemalloc as Allocator;
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/// Get the size of a heap block.
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///
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/// # Safety
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///
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/// Passing a non-heap allocated pointer to this function results in undefined behavior.
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pub unsafe extern "C" fn usable_size(ptr: *const c_void) -> usize {
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tikv_jemallocator::usable_size(ptr)
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}
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/// Memory allocation APIs compatible with libc
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pub mod libc_compat {
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pub use tikv_jemalloc_sys::{free, malloc, realloc};
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}
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}
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#[cfg(all(
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not(windows),
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any(feature = "use-system-allocator", target_env = "ohos")
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))]
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mod platform {
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pub use std::alloc::System as Allocator;
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use std::os::raw::c_void;
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/// Get the size of a heap block.
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///
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/// # Safety
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///
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/// Passing a non-heap allocated pointer to this function results in undefined behavior.
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pub unsafe extern "C" fn usable_size(ptr: *const c_void) -> usize {
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#[cfg(target_vendor = "apple")]
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return libc::malloc_size(ptr);
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#[cfg(not(target_vendor = "apple"))]
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return libc::malloc_usable_size(ptr as *mut _);
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}
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pub mod libc_compat {
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pub use libc::{free, malloc, realloc};
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}
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}
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#[cfg(windows)]
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mod platform {
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pub use std::alloc::System as Allocator;
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use std::os::raw::c_void;
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use windows_sys::Win32::Foundation::FALSE;
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use windows_sys::Win32::System::Memory::{GetProcessHeap, HeapSize, HeapValidate};
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/// Get the size of a heap block.
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///
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/// # Safety
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///
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/// Passing a non-heap allocated pointer to this function results in undefined behavior.
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pub unsafe extern "C" fn usable_size(mut ptr: *const c_void) -> usize {
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let heap = GetProcessHeap();
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if HeapValidate(heap, 0, ptr) == FALSE {
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ptr = *(ptr as *const *const c_void).offset(-1)
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}
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HeapSize(heap, 0, ptr) as usize
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}
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}
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