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Make Background Hang Monitor Optional

Browse source 
This is done by wrapping all channels of communication
and related objects inside Option which are configured
using flag inside servo_config.
This commit is contained in:
Kunal Mohan 2020-02-22 16:10:32 +05:30
parent ada95b9878
commit a05553f188
No known key found for this signature in database
GPG key ID: 2B475A4524237BAC
9 changed files with 126 additions and 74 deletions
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51
components/constellation/pipeline.rs
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@ -131,7 +131,7 @@ pub struct InitialPipelineState {
pub background_monitor_register: Option<Box<dyn BackgroundHangMonitorRegister>>,
/// A channel for the background hang monitor to send messages to the constellation.
pub background_hang_monitor_to_constellation_chan: IpcSender<HangMonitorAlert>,
pub background_hang_monitor_to_constellation_chan: Option<IpcSender<HangMonitorAlert>>,
/// A channel for the layout thread to send messages to the constellation.
pub layout_to_constellation_chan: IpcSender<LayoutMsg>,
@ -319,15 +319,24 @@ impl Pipeline {
Some(sampler_chan)
} else {
// Should not be None in single-process mode.
let register = state
.background_monitor_register
.expect("Couldn't start content, no background monitor has been initiated");
unprivileged_pipeline_content.start_all::<Message, LTF, STF>(
false,
register,
state.event_loop_waker,
);
None
if opts::get().background_hang_monitor {
let register = state.background_monitor_register.expect(
"Couldn't start content, no background monitor has been initiated",
);
unprivileged_pipeline_content.start_all::<Message, LTF, STF>(
false,
Some(register),
state.event_loop_waker,
);
None
} else {
unprivileged_pipeline_content.start_all::<Message, LTF, STF>(
false,
None,
state.event_loop_waker,
);
None
}
};
(EventLoop::new(script_chan), sampler_chan)
@ -488,7 +497,7 @@ pub struct UnprivilegedPipelineContent {
opener: Option<BrowsingContextId>,
namespace_request_sender: IpcSender<PipelineNamespaceRequest>,
script_to_constellation_chan: ScriptToConstellationChan,
background_hang_monitor_to_constellation_chan: IpcSender<HangMonitorAlert>,
background_hang_monitor_to_constellation_chan: Option<IpcSender<HangMonitorAlert>>,
sampling_profiler_port: Option<IpcReceiver<SamplerControlMsg>>,
layout_to_constellation_chan: IpcSender<LayoutMsg>,
scheduler_chan: IpcSender<TimerSchedulerMsg>,
@ -520,7 +529,7 @@ impl UnprivilegedPipelineContent {
pub fn start_all<Message, LTF, STF>(
self,
wait_for_completion: bool,
background_hang_monitor_register: Box<dyn BackgroundHangMonitorRegister>,
background_hang_monitor_register: Option<Box<dyn BackgroundHangMonitorRegister>>,
event_loop_waker: Option<Box<dyn EventLoopWaker>>,
) where
LTF: LayoutThreadFactory<Message = Message>,
@ -730,13 +739,17 @@ impl UnprivilegedPipelineContent {
pub fn register_with_background_hang_monitor(
&mut self,
) -> Box<dyn BackgroundHangMonitorRegister> {
HangMonitorRegister::init(
self.background_hang_monitor_to_constellation_chan.clone(),
self.sampling_profiler_port
.take()
.expect("no sampling profiler?"),
)
) -> Option<Box<dyn BackgroundHangMonitorRegister>> {
self.background_hang_monitor_to_constellation_chan
.clone()
.map(|bhm| {
HangMonitorRegister::init(
bhm.clone(),
self.sampling_profiler_port
.take()
.expect("no sampling profiler?"),
)
})
}
pub fn script_to_constellation_chan(&self) -> &ScriptToConstellationChan {