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Fix space leak when pipeline is closed

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Add a new control message to drop remove worklets.

Implement `Drop` for `Worklet` and get the worklet thread pool. Use that
pool to send `ExitWorklet` to all the threads with the id of the
`Worklet` that it's dropping.
This commit is contained in:
Agustin Chiappe Berrini 2018-09-08 18:02:00 -04:00
parent f7630dad87
commit b3e85472ed
1 changed files with 26 additions and 4 deletions
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30
components/script/dom/worklet.rs
View file

@ -147,6 +147,13 @@ impl WorkletMethods for Worklet {
}
}
impl Drop for Worklet {
fn drop(&mut self) {
let script_thread = ScriptThread::worklet_thread_pool();
script_thread.exit_worklet(self.worklet_id);
}
}
/// A guid for worklets.
#[derive(Clone, Copy, Debug, Eq, Hash, JSTraceable, PartialEq)]
pub struct WorkletId(Uuid);
@ -301,10 +308,14 @@ impl WorkletThreadPool {
promise: TrustedPromise::new(promise.clone()),
});
}
// If any of the threads are blocked waiting on data, wake them up.
let _ = self.cold_backup_sender.send(WorkletData::WakeUp);
let _ = self.hot_backup_sender.send(WorkletData::WakeUp);
let _ = self.primary_sender.send(WorkletData::WakeUp);
self.wake_threads();
}
pub(crate) fn exit_worklet(&self, worklet_id: WorkletId) {
for sender in &[&self.control_sender_0, &self.control_sender_1, &self.control_sender_2] {
let _ = sender.send(WorkletControl::ExitWorklet(worklet_id));
}
self.wake_threads();
}
/// For testing.
@ -314,6 +325,13 @@ impl WorkletThreadPool {
let _ = self.primary_sender.send(msg);
receiver.recv().expect("Test worklet has died?")
}
fn wake_threads(&self) {
// If any of the threads are blocked waiting on data, wake them up.
let _ = self.cold_backup_sender.send(WorkletData::WakeUp);
let _ = self.hot_backup_sender.send(WorkletData::WakeUp);
let _ = self.primary_sender.send(WorkletData::WakeUp);
}
}
/// The data messages sent to worklet threads
@ -327,6 +345,7 @@ enum WorkletData {
/// The control message sent to worklet threads
enum WorkletControl {
ExitWorklet(WorkletId),
FetchAndInvokeAWorkletScript {
pipeline_id: PipelineId,
worklet_id: WorkletId,
@ -621,6 +640,9 @@ impl WorkletThread {
/// Process a control message.
fn process_control(&mut self, control: WorkletControl) {
match control {
WorkletControl::ExitWorklet(worklet_id) => {
self.global_scopes.remove(&worklet_id);
},
WorkletControl::FetchAndInvokeAWorkletScript {
pipeline_id, worklet_id, global_type, origin, base_url,
script_url, credentials, pending_tasks_struct, promise,