Dispatching to the underlying thread of what could be a thread-pool can lead to data-race as the code won't be run where you expect it to.
Differential Revision: https://phabricator.services.mozilla.com/D82632
- Fixes a data race where the member variable is being written to by
EnsurePerformanceCounter on the worker thread while being read on a separate
thread (via Worker.postMessage).
- Apply some pointer guildelines to the member variable getters.
- Constify some things that should be const.
Differential Revision: https://phabricator.services.mozilla.com/D82475
We want it to returning the actual nsThread if that's where the MessageLoop would dispatch its tasks; otherwise return the MessageLoop's EventTarget
Depends on D80357
Differential Revision: https://phabricator.services.mozilla.com/D80811
We want it to returning the actual nsThread if that's where the MessageLoop would dispatch its tasks; otherwise return the MessageLoop's EventTarget
Depends on D80357
Differential Revision: https://phabricator.services.mozilla.com/D80811
Apparently I added these in the initial commit for RecursiveMutex. I'm
not quite sure what I was thinking, but we don't need them for the
RecursiveMutex itself. (We have them on the corresponding `*Auto*Lock`
classes, which are also `MOZ_RAII`.)
Differential Revision: https://phabricator.services.mozilla.com/D81345
This will allow to remove AbstractThread::Current() as GetCurrentSerialEventTarget TLS value will be set whenever a task dispatched on the XPCOMThreadWrapper is run.
Differential Revision: https://phabricator.services.mozilla.com/D80355
Before P1, GetCurrentThreadSerialEventTarget would have always returned the same data as NS_GetCurrentThread, making the comment incorrect Now it will properly return the running TaskQueue if any.
This change of name more clearly exposes what they are doing, as we aren't always dealing with threads directly; but a nsISerialEventTarget
Differential Revision: https://phabricator.services.mozilla.com/D80354
In the future, we may want to extend GetCurrentThreadSerialEventTarget to return the actual nsISerialEventTarget used to dispatch the task.
Differential Revision: https://phabricator.services.mozilla.com/D80353
When TaskQueue was first conceived; it was only used with AbstractThreads and with tail dispatch.
By default, AbstractThread::Dispatch dropped the flags , as it was dispatching all tasks via the tail dispatcher.
It was an oversight, there's no use-case where we wouldn't want the dispatch flags to be carried forward.
It also simplifies the code and TaskQueue's use.
Depends on D80351
Differential Revision: https://phabricator.services.mozilla.com/D80352
We have a clang-plugin check that wants to prefer `SprintfLiteral` over `snprintf`, but for some reason this wasn't caught before clang-11. I _think_ it has to do with previous versions not being able to see that `buflen` was constant, but I'm not really sure.
Differential Revision: https://phabricator.services.mozilla.com/D80021
This removes variants of "blacklist" from the xpcom directory. The preference name "network.file.path_blacklist" is left in place and will need a more thorough plan for removal. Instances of `MOZ_ASAN_BLACKLIST` remain as well and should be replaced in a larger modifcation of the `#define` in the mfbt component.
Differential Revision: https://phabricator.services.mozilla.com/D80098
When chaining a MozPromise set to be dispatched via the direct task queue (or synchronous), it makes sense for the chained promise to be dispatched in the same fashion.
All MozPromises generated by the IPC bindings are set to use the direct task queue in order to prevent the then runnable to run out of order with other IPC tasks.
We want to preserve that task ordering by default.
Differential Revision: https://phabricator.services.mozilla.com/D78178
This prevent being able to assert in the AutoTaskDispatcher that we are using it from the right thread/taskqueue as the SimpleTaskQueue object isn't thread-safe.
We want to assert that all nsIDirectTaskDispatcher methods are only ever accessed on the underlying thread. To do so require that the scope of AutoTaskDispatcher to terminate prior the AutoTaskGuard one.
Differential Revision: https://phabricator.services.mozilla.com/D79096
We extract the dealing of direct tasks from the TailDispatcher object and move into to the existing nsThread and TaskQueue classes.
TaskQueue is made to work with do_QueryInterface.
We continue accessing the direct tasks dispatcher via the TailDispatcher for now, which itself will forward the dealing of such tasks to the underlying thread.
Differential Revision: https://phabricator.services.mozilla.com/D79093
When chaining a MozPromise set to be dispatched via the direct task queue (or synchronous), it makes sense for the chained promise to be dispatched in the same fashion.
All MozPromises generated by the IPC bindings are set to use the direct task queue in order to prevent the then runnable to run out of order with other IPC tasks.
We want to preserve that task ordering by default.
Differential Revision: https://phabricator.services.mozilla.com/D78178
When performing the last GC, remaining state watchers would dispatch direct tasks ; this was exposed with P3. Ensure this never happens.
Differential Revision: https://phabricator.services.mozilla.com/D75499
During the last cycle collection, state watchers may attempt to dispatch tasks to the current AbstractThread, so we can't clear the TLS entry until that step has completed.
We want the object to be deleted last; ordering in call to ClearOnShutdown() can't guarantee it.
Differential Revision: https://phabricator.services.mozilla.com/D75498
Gecko Idle detection relies heavily on RefreshDriver. GC/CC scheduling, including when to run GC or CC slices, and the length of the slices, is mostly based on idle time. As WebXR isn't using normal RefreshDriver, the content process thinks it's idle and GC and CC get basically up to 50 ms slices.
Not having WebXR idle detection is causing stutter frames during immersive presentation. This patch implements idle deadline hint and sets the correct GC slices budgets during WebXR presentation.
Differential Revision: https://phabricator.services.mozilla.com/D74426
This wraps the current thread such that a call to Dispatch will be done as direct task dispatch instead so that the task will be run in the current event loop.
This allows for have similar (but not identical to) the microtask semantics of JS promises
Differential Revision: https://phabricator.services.mozilla.com/D69995
If set, the callback will be dispatched via a direct task.
Direct tasks are run via the current thread's tail dispatcher.
This mechanism is only available if both the caller and the target are on the same thread and an AbstractThread is available
Differential Revision: https://phabricator.services.mozilla.com/D71592
already_AddRefed destructor assert that it's nullptr.
DelayedDispatch check that the value passed isn't 0 and return an error code, leaving the already_AddRefed untouched.
Differential Revision: https://phabricator.services.mozilla.com/D73821
already_AddRefed destructor assert that it's nullptr.
DelayedDispatch check that the value passed isn't 0 and return an error code, leaving the already_AddRefed untouched.
Differential Revision: https://phabricator.services.mozilla.com/D73821
already_AddRefed destructor assert that it's nullptr.
DelayedDispatch check that the value passed isn't 0 and return an error code, leaving the already_AddRefed untouched.
Differential Revision: https://phabricator.services.mozilla.com/D73821
In non-DEBUG builds, `OffTheBooksCondVar::Wait` has `AUTO_PROFILER_THREAD_SLEEP`, but it's not in DEBUG builds.
`profiler_thread_sleep` does a `MOZ_ASSERT(mSleep == AWAKE)` in DEBUG builds, so the double call that happens in non-DEBUG wouldn't trigger the assertion!
This patch adds `AUTO_PROFILER_THREAD_SLEEP` in DEBUG `OffTheBooksCondVar::Wait`, to catch more misuses during development.
Depends on D72851
Differential Revision: https://phabricator.services.mozilla.com/D72852
CondVar already calls `AUTO_PROFILER_THREAD_SLEEP`, which shouldn't be called recursively.
mozilla::Monitor also uses CondVar, so it shouldn't be surrounded by `AUTO_PROFILER_THREAD_SLEEP` either.
Depends on D72850
Differential Revision: https://phabricator.services.mozilla.com/D72851
This is in preparation for running the tail dispatcher off
nsIThreadObserver callbacks, which only work during regular
event processing.
Differential Revision: https://phabricator.services.mozilla.com/D72264
This is how it used to be, before the Quantum DOM stuff. We use
nsIThreadInternal because that supports thread observers, which we
leverage in the next patch.
Differential Revision: https://phabricator.services.mozilla.com/D71709
It was required once upon a time to be able to use MozPromise on Workers.
Today a MozPromise work with nsISerialEventTarget and no longer rely on this. It can go.
Differential Revision: https://phabricator.services.mozilla.com/D71442
AutoEnter was an attempt around a race between AbstractThread and MessageLoopAbstractThreadWrap that would cause AbstractThread::GetCurrent() to return an incorrect value. MessageLoopAbstractThreadWrapper is no more and as such AutoEnter is no longer required.
Differential Revision: https://phabricator.services.mozilla.com/D71279
prior bug 1364821, AbstractThread::GetCurrent() would always return AbstractThread::MainThread() when called from the main thread.
After this change, we had to run within an AutoEnter scope.
A hidden side effect of this change was that under most cases AbstractThread::MainThread::Dispatch() would no longer use the tail dispatcher to dispatch a task.
It can be safely assume that whenever you're on the main thread, the equivalent AbstractThread is usable.
In the next commit, we will be removing AutoEnter entirely.
Differential Revision: https://phabricator.services.mozilla.com/D71148
One could possibly make larger changes to make the setup less error prone, but hopefully we'll
replace this code with the new scheduler relatively soon.
And the assertion there should still enforce correct behavior.
Differential Revision: https://phabricator.services.mozilla.com/D69988
--HG--
extra : moz-landing-system : lando
Jean-Yves Avenard
Honza Bambas
Bas Schouten
Perry Jiang
Simon Giesecke
Brindusan Cristian
Nihanth Subramanya
Nathan Froyd
David Major
Eric Rahm
Razvan Maries
Dana Keeler
Bogdan Tara
Sylvestre Ledru
Lina Cambridge
Imanol Fernandez
Narcis Beleuzu
Mirko Brodesser
Dorel Luca
Gerald Squelart
Bobby Holley
Ciure Andrei
Olli Pettay