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-rw-r--r--tools/profiler/gecko/ProfilerIOInterposeObserver.cpp216
1 files changed, 216 insertions, 0 deletions
diff --git a/tools/profiler/gecko/ProfilerIOInterposeObserver.cpp b/tools/profiler/gecko/ProfilerIOInterposeObserver.cpp
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+++ b/tools/profiler/gecko/ProfilerIOInterposeObserver.cpp
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ProfilerIOInterposeObserver.h"
+#include "GeckoProfiler.h"
+
+using namespace mozilla;
+
+/* static */
+ProfilerIOInterposeObserver& ProfilerIOInterposeObserver::GetInstance() {
+ static ProfilerIOInterposeObserver sProfilerIOInterposeObserver;
+ return sProfilerIOInterposeObserver;
+}
+
+namespace geckoprofiler::markers {
+struct FileIOMarker {
+ static constexpr Span<const char> MarkerTypeName() {
+ return MakeStringSpan("FileIO");
+ }
+ static void StreamJSONMarkerData(baseprofiler::SpliceableJSONWriter& aWriter,
+ const ProfilerString8View& aOperation,
+ const ProfilerString8View& aSource,
+ const ProfilerString8View& aFilename,
+ MarkerThreadId aOperationThreadId) {
+ aWriter.StringProperty("operation", aOperation);
+ aWriter.StringProperty("source", aSource);
+ if (aFilename.Length() != 0) {
+ aWriter.StringProperty("filename", aFilename);
+ }
+ if (!aOperationThreadId.IsUnspecified()) {
+ // Tech note: If `ToNumber()` returns a uint64_t, the conversion to
+ // int64_t is "implementation-defined" before C++20. This is acceptable
+ // here, because this is a one-way conversion to a unique identifier
+ // that's used to visually separate data by thread on the front-end.
+ aWriter.IntProperty(
+ "threadId",
+ static_cast<int64_t>(aOperationThreadId.ThreadId().ToNumber()));
+ }
+ }
+ static MarkerSchema MarkerTypeDisplay() {
+ using MS = MarkerSchema;
+ MS schema{MS::Location::MarkerChart, MS::Location::MarkerTable,
+ MS::Location::TimelineFileIO};
+ schema.AddKeyLabelFormatSearchable("operation", "Operation",
+ MS::Format::String,
+ MS::Searchable::Searchable);
+ schema.AddKeyLabelFormatSearchable("source", "Source", MS::Format::String,
+ MS::Searchable::Searchable);
+ schema.AddKeyLabelFormatSearchable("filename", "Filename",
+ MS::Format::FilePath,
+ MS::Searchable::Searchable);
+ schema.AddKeyLabelFormatSearchable("threadId", "Thread ID",
+ MS::Format::String,
+ MS::Searchable::Searchable);
+ return schema;
+ }
+};
+} // namespace geckoprofiler::markers
+
+static auto GetFilename(IOInterposeObserver::Observation& aObservation) {
+ AUTO_PROFILER_STATS(IO_filename);
+ constexpr size_t scExpectedMaxFilename = 512;
+ nsAutoStringN<scExpectedMaxFilename> filename16;
+ aObservation.Filename(filename16);
+ nsAutoCStringN<scExpectedMaxFilename> filename8;
+ if (!filename16.IsEmpty()) {
+ CopyUTF16toUTF8(filename16, filename8);
+ }
+ return filename8;
+}
+
+void ProfilerIOInterposeObserver::Observe(Observation& aObservation) {
+ if (profiler_is_locked_on_current_thread()) {
+ // Don't observe I/Os originating from the profiler itself (when internally
+ // locked) to avoid deadlocks when calling profiler functions.
+ AUTO_PROFILER_STATS(IO_profiler_locked);
+ return;
+ }
+
+ Maybe<uint32_t> maybeFeatures = profiler_features_if_active_and_unpaused();
+ if (maybeFeatures.isNothing()) {
+ return;
+ }
+ uint32_t features = *maybeFeatures;
+
+ if (!profiler_thread_is_being_profiled_for_markers(
+ profiler_main_thread_id()) &&
+ !profiler_thread_is_being_profiled_for_markers()) {
+ return;
+ }
+
+ AUTO_PROFILER_LABEL("ProfilerIOInterposeObserver", PROFILER);
+ if (IsMainThread()) {
+ // This is the main thread.
+ // Capture a marker if any "IO" feature is on.
+ // If it's not being profiled, we have nowhere to store FileIO markers.
+ if (!profiler_thread_is_being_profiled_for_markers() ||
+ !(features & ProfilerFeature::MainThreadIO)) {
+ return;
+ }
+ AUTO_PROFILER_STATS(IO_MT);
+ nsAutoCString type{aObservation.FileType()};
+ type.AppendLiteral("IO");
+
+ // Store the marker in the current thread.
+ PROFILER_MARKER(
+ type, OTHER,
+ MarkerOptions(
+ MarkerTiming::Interval(aObservation.Start(), aObservation.End()),
+ MarkerStack::Capture()),
+ FileIOMarker,
+ // aOperation
+ ProfilerString8View::WrapNullTerminatedString(
+ aObservation.ObservedOperationString()),
+ // aSource
+ ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()),
+ // aFilename
+ GetFilename(aObservation),
+ // aOperationThreadId - Do not include a thread ID, as it's the same as
+ // the markers. Only include this field when the marker is being sent
+ // from another thread.
+ MarkerThreadId{});
+
+ } else if (profiler_thread_is_being_profiled_for_markers()) {
+ // This is a non-main thread that is being profiled.
+ if (!(features & ProfilerFeature::FileIO)) {
+ return;
+ }
+ AUTO_PROFILER_STATS(IO_off_MT);
+
+ nsAutoCString type{aObservation.FileType()};
+ type.AppendLiteral("IO");
+
+ // Share a backtrace between the marker on this thread, and the marker on
+ // the main thread.
+ UniquePtr<ProfileChunkedBuffer> backtrace = profiler_capture_backtrace();
+
+ // Store the marker in the current thread.
+ PROFILER_MARKER(
+ type, OTHER,
+ MarkerOptions(
+ MarkerTiming::Interval(aObservation.Start(), aObservation.End()),
+ backtrace ? MarkerStack::UseBacktrace(*backtrace)
+ : MarkerStack::NoStack()),
+ FileIOMarker,
+ // aOperation
+ ProfilerString8View::WrapNullTerminatedString(
+ aObservation.ObservedOperationString()),
+ // aSource
+ ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()),
+ // aFilename
+ GetFilename(aObservation),
+ // aOperationThreadId - Do not include a thread ID, as it's the same as
+ // the markers. Only include this field when the marker is being sent
+ // from another thread.
+ MarkerThreadId{});
+
+ // Store the marker in the main thread as well, with a distinct marker name
+ // and thread id.
+ type.AppendLiteral(" (non-main thread)");
+ PROFILER_MARKER(
+ type, OTHER,
+ MarkerOptions(
+ MarkerTiming::Interval(aObservation.Start(), aObservation.End()),
+ backtrace ? MarkerStack::UseBacktrace(*backtrace)
+ : MarkerStack::NoStack(),
+ // This is the important piece that changed.
+ // It will send a marker to the main thread.
+ MarkerThreadId::MainThread()),
+ FileIOMarker,
+ // aOperation
+ ProfilerString8View::WrapNullTerminatedString(
+ aObservation.ObservedOperationString()),
+ // aSource
+ ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()),
+ // aFilename
+ GetFilename(aObservation),
+ // aOperationThreadId - Include the thread ID in the payload.
+ MarkerThreadId::CurrentThread());
+
+ } else {
+ // This is a thread that is not being profiled. We still want to capture
+ // file I/Os (to the main thread) if the "FileIOAll" feature is on.
+ if (!(features & ProfilerFeature::FileIOAll)) {
+ return;
+ }
+ AUTO_PROFILER_STATS(IO_other);
+ nsAutoCString type{aObservation.FileType()};
+ if (profiler_is_active_and_thread_is_registered()) {
+ type.AppendLiteral("IO (non-profiled thread)");
+ } else {
+ type.AppendLiteral("IO (unregistered thread)");
+ }
+
+ // Only store this marker on the main thread, as this thread was not being
+ // profiled.
+ PROFILER_MARKER(
+ type, OTHER,
+ MarkerOptions(
+ MarkerTiming::Interval(aObservation.Start(), aObservation.End()),
+ MarkerStack::Capture(),
+ // Store this marker on the main thread.
+ MarkerThreadId::MainThread()),
+ FileIOMarker,
+ // aOperation
+ ProfilerString8View::WrapNullTerminatedString(
+ aObservation.ObservedOperationString()),
+ // aSource
+ ProfilerString8View::WrapNullTerminatedString(aObservation.Reference()),
+ // aFilename
+ GetFilename(aObservation),
+ // aOperationThreadId - Note which thread this marker is coming from.
+ MarkerThreadId::CurrentThread());
+ }
+}