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Stop relying on linking details of std’s default allocator

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We’ve been bitten before by symbol names changing:
https://github.com/servo/heapsize/pull/46
and upstream is planning to stop using jemalloc by default:
https://github.com/rust-lang/rust/issues/33082#issuecomment-309781465

So use the (relatively) new `#[global_allocator]` attribute
to explicitly select the system allocator on Windows
and jemalloc (now in an external crate) on other platforms.
This choice matches current defaults.
This commit is contained in:
Simon Sapin 2017-10-18 13:38:07 +02:00
parent 4c538b642e
commit 959ce482dd
20 changed files with 158 additions and 62 deletions
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5
components/layout_thread/lib.rs
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@ -39,6 +39,7 @@ extern crate script_layout_interface;
extern crate script_traits;
extern crate selectors;
extern crate serde_json;
extern crate servo_allocator;
extern crate servo_arc;
extern crate servo_atoms;
extern crate servo_config;
@ -84,7 +85,7 @@ use layout::webrender_helpers::WebRenderDisplayListConverter;
use layout::wrapper::LayoutNodeLayoutData;
use layout_traits::LayoutThreadFactory;
use libc::c_void;
use malloc_size_of::{malloc_size_of, MallocSizeOf, MallocSizeOfOps};
use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
use metrics::{PaintTimeMetrics, ProfilerMetadataFactory};
use msg::constellation_msg::PipelineId;
use msg::constellation_msg::TopLevelBrowsingContextId;
@ -775,7 +776,7 @@ impl LayoutThread {
let mut reports = vec![];
// Servo uses vanilla jemalloc, which doesn't have a
// malloc_enclosing_size_of function.
let mut ops = MallocSizeOfOps::new(malloc_size_of, None, None);
let mut ops = MallocSizeOfOps::new(::servo_allocator::usable_size, None, None);
// FIXME(njn): Just measuring the display tree for now.
let rw_data = possibly_locked_rw_data.lock();