On real hardware, when a background thread finishes compilation, it must signal
to the other executing threads that they need to reload a new version of the
code. Ideally, each executing thread would run an ISB instruction to do so. We
hereby use a system call membarrier that interrupts every other running thread,
and will cause the same effect as a local ISB would. It is heavyweight, so we
make sure to only run it in the case where we're on a background thread.
In the simulator, pending icache flushing requests were never satisfied before
this patch, when the request was emitted from a thread other than the main
thread. Similar behavior as above is emulated.
Differential Revision: https://phabricator.services.mozilla.com/D88395
PDF print preview are using about:blank documents, which are ignored
by DevTools in order to save resources.
We avoid creating targets for these, very often, transcient documents.
I tried to find ways to distinguish typical temporary about:blank documents
from this print preview one.
Differential Revision: https://phabricator.services.mozilla.com/D88956
This adds an OOL path to handle null/undefined => globalThis without a VM call.
IonBuilder optimizes that case based on TI and this ensures we're not a lot slower
for that.
Also give the MIR instruction an empty AliasSet so we can optimize it better in
inlined functions. We no longer have the thisValue hook mentioned in the comment.
Differential Revision: https://phabricator.services.mozilla.com/D88974
Initially the plan was to reuse TraceCacheIRStub but this patch adds the tracing
code for Warp separately because:
* CacheIR stub data in Warp contains nursery indexes. It's nice to keep that out of the IC-tracing code.
* We can use WarpGCPtr similar to other snapshotted GC pointers. It asserts GC things are not moved.
Differential Revision: https://phabricator.services.mozilla.com/D88965
Longer-term more CompileInfo fields should be moved into WarpSnapshot, we can
then dump these fields.
Depends on D88963
Differential Revision: https://phabricator.services.mozilla.com/D88964
Use TODO(post-Warp) for TODOs that can only be addressed when IonBuilder is gone.
Remove some TODOs that are no longer relevant or don't need to be addressed
short-term.
Depends on D88961
Differential Revision: https://phabricator.services.mozilla.com/D88962
Allowlisting this op in the checker is wrong because we don't want a
MagicValue to show up for JSOp::ToString in Baseline.
Depends on D88960
Differential Revision: https://phabricator.services.mozilla.com/D88961
The ones in maybeInlineIC have been addressed. The one about extra var environments
isn't really a TODO for Warp specifically.
Also change the stub data copying to just use nullptr if there's no stub data.
This is fairly common for simpler IC stubs.
Differential Revision: https://phabricator.services.mozilla.com/D88960
This patch ports existing ProfilerMarkerPayload types to draft struct definitions that may be used with the new markers API.
This is just a starting point, they may be changed later on as needed, see meta-bug 1661394.
Differential Revision: https://phabricator.services.mozilla.com/D87259
This is the main public marker API:
- `AddMarkerToBuffer` can be used to store a marker to any buffer. This could be useful to code that wants to store markers outside of the default profiler buffers.
- `baseprofiler::AddMarker`/`profiler_add_marker` store a marker in the appropriate profiler buffer.
- BASE_PROFILER_MARKER and PROFILER_MARKER do the same, but are also defined (and empty) when MOZ_GECKO_PROFILER is not #defined.
All these take a name, marker options, a marker type, and the type's expected arguments if any (as expected by the `StreamJSONMarkerData` function).
Extra helpers for the most common types:
- BASE_PROFILER_MARKER_UNTYPED and PROFILER_MARKER_UNTYPED store a marker with no data payload.
- BASE_PROFILER_MARKER_TEXT and PROFILER_MARKER_TEXT store a text marker. `baseprofiler::markers::Text` is an example of how new marker types can be defined.
Differential Revision: https://phabricator.services.mozilla.com/D87257
Main marker serialization function, which accepts the same arguments (with implicit conversions) as the marker type's `StreamJSONMarkerData(JSONWriter&, ...)` function, and stores them in a ProfileChunkedBuffer after the marker name and options.
Differential Revision: https://phabricator.services.mozilla.com/D87255
`DeserializeAfterKindAndStream()` is the main function that extracts all the marker data (past the already-read entry kind), and streams it to JSON using the user-provided `Stream(JSONWriter&, ...)` function in the appropriate marker type definition.
It currently requires two external functions to stream the name and the optional backtrace, because these are different between the two profilers. This may change in the future.
(Deserialization is implemented before serialization, because the `Deserialize()` function is needed during serialization to get a marker type tag.)
Differential Revision: https://phabricator.services.mozilla.com/D87254
`NoPayload` will be mostly used internally when adding markers without payload data.
It has an empty specialization of the MarkerTypeHelper (mainly to catch misuses), and the add-marker code will need to have different compile-time paths to handle it.
Differential Revision: https://phabricator.services.mozilla.com/D87252
Marker types will be defined with a simple struct that contains (amongst other things) one `StreamJSONMarkerData(JSONWriter&, ...)` function.
This patch introduces a type-traits-like helper to examine that function. This will be used to check the arguments given to the upcoming add-marker function, to serialize and deserialize them.
Differential Revision: https://phabricator.services.mozilla.com/D87251
This is similar to the existing deserializer table in ProfilerMarkerPayload.*:
Each type of marker (except the `NoPayload` one) has its corresponding deserializer in a table, and the index is used as a tag in the serialization buffer.
Differential Revision: https://phabricator.services.mozilla.com/D87250
A `MarkerOptions` must be constructed from a MarkerCategory, e.g.: `mozilla::baseprofiler::category::OTHER`. This will be required for all markers.
`MarkerOptions` also contains defaulted `MarkerThreadId`, `MarkerTiming`, `MarkerStack`, and `MarkerInnerWindowId`. They may be set by calling `WithOptions()` on the MarkerCategory, e.g.:
`PROFILER_MARKER<...>("name", OTHER.WithOptions(MarkerThreadId(otherThread), MarkerStack::Capture()), ...);`
Differential Revision: https://phabricator.services.mozilla.com/D87249
This marker option allows three cases:
- By default, no stacks are captured.
- The caller can request a stack capture, and the add-marker code will take care of it in the most efficient way.
- The caller can still provide an existing backtrace, for cases where a marker reports something that happened elsewhere.
Differential Revision: https://phabricator.services.mozilla.com/D87247
`profiler_capture_backtrace(ProfileChunkedBuffer&)` renamed to `profiler_capture_backtrace_into(ProfileChunkedBuffer&)` (notice "_into"), which is clearer.
New function `profiler_capture_backtrace()` creates a buffer, uses `profiler_capture_backtrace_into()`, and returns a `UniquePtr<ProfileChunkedBuffer>`, which can later be given to `MarkerStack::TakeBacktrace`.
`profiler_get_backtrace()` (returning a `UniqueProfilerBacktrace`) now uses `profiler_capture_backtrace()`.
This patch reduces most duplicate code between these functions.
Differential Revision: https://phabricator.services.mozilla.com/D88280
`IsEmpty()` makes it easier for users to determine if there is anything stored in the `ProfileChunkedBuffer`.
And `ProfileChunkedBuffer` can now be serialized from a raw pointer, which will be useful when adding markers with an optional stack.
Deserialization should be done to a `UniquePtr<ProfileChunkedBuffer>`, which is already implemented.
Differential Revision: https://phabricator.services.mozilla.com/D87246
This moves the existing MarkerTiming class introduced in bug 1640969 to the BaseProfilerMarkersPrerequesites.h header, and can be used as a marker option.
Some minor clarifying changes:
- `Instant()` is split into two functions: `InstantNow()` and `InstantAt(TimeStamp)`.
- `Interval(TimeStamp, TimeStamp)` must be given both start and end, otherwise `IntervalUntilNowFrom(TimeStamp)` takes the start only and ends "now".
Also the default construction is now reserved for internal marker usage, the private member function `IsUnspecified()` will be used by the add-marker code will replace it with `InstantNow()`.
The serialization contains the phase, and only one or two timestamps as needed, to save space for non-interval timings.
Differential Revision: https://phabricator.services.mozilla.com/D87245
This marker option captures a given thread id.
If left unspecified (by default construction) during the add-marker call, the current thread id will be used then.
Differential Revision: https://phabricator.services.mozilla.com/D87244
The main, and only compulsory, marker option is the `MarkerCategory`, which captures the "category pair", as well as the parent category.
Differential Revision: https://phabricator.services.mozilla.com/D88154
The upcoming profiler-specific add-marker function will need to know which `ProfileChunkedBuffer` to serialize to, `profiler_get_core_buffer()` give access to the profiler's buffer, and `CachedCoreBuffer()` keeps it stored in a function-static object.
Differential Revision: https://phabricator.services.mozilla.com/D87256
These string views are similar to `std::string_view`, but they are optimized to be serialized in the profiler buffer, and later deserialized and streamed to JSON.
They accept literal strings, and keep them as unowned raw pointers and sizes.
They also accept any substring reference, assuming that they will only be used as parameters during function calls, and therefore the dependent string will live during that call where these `StringView`'s are used.
Internally, they also allow optional string ownership, which is only used during deserialization and streaming.
This is hidden, so that users are not tempted to use potentially expensive string allocations during profiling; it's only used *after* profiling, so it's less of an impact to allocate strings then. (But it could still be optimized later on, as part of bug 1577656.)
Differential Revision: https://phabricator.services.mozilla.com/D87242
This patch introduces all new files that contain the new markers C++ API and implementation.
They are mostly empty at this time, only including each other as eventually needed, and with `#ifdef MOZ_GECKO_PROFILER` guards.
Rough inclusion diagram: (header <-- includer)
BaseProfilerMarkerPrerequesites.h <-- ProfilerMarkerPrerequesites.h (Useful types: Input string view, marker options)
^ ^
BaseProfilerMarkerDetail.h <-- ProfilerMarkerDetail.h (Implementation details)
^ ^
BaseProfilerMarkers.h <-- ProfilerMarkers.h (Main API)
^ ^--------- ^ ^---------
BaseProfilerMarkerTypes.h | <-- ProfilerMarkerTypes.h | (Common marker types)
^ BaseProfiler.h <-- GeckoProfiler.h (Existing main profiler headers)
Differential Revision: https://phabricator.services.mozilla.com/D87241
Benjamin Bouvier
Alexandre Poirot
Jan de Mooij
Henri Sivonen
Sam Foster
Razvan Maries
Emma Malysz
Gerald Squelart
Daisuke Akatsuka
Andrew McCreight
Tooru Fujisawa