class EventContext
Defined at line 46 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
Allows adding custom arguments into track events. Example:
TRACE_EVENT_BEGIN("category", "Title",
[](perfetto::EventContext ctx) {
auto* log = ctx.event()->set_log_message();
log->set_body_iid(1234);
ctx.AddDebugAnnotation("name", 1234);
});
Public Methods
void EventContext (EventContext && )Defined at line 48 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
void EventContext (protos::pbzero::TrackEvent * event, internal::TrackEventIncrementalState * incremental_state, bool )Defined at line 50 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
internal::TrackEventIncrementalState * GetIncrementalState ()Defined at line 58 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
bool ShouldFilterDebugAnnotations ()Disclaimer: Experimental method, subject to change.
Exposed publicly to emit some TrackEvent fields in Chromium only in local
tracing. Long-term, we really shouldn't be (ab)using the
filter_debug_annotation setting for this.
TODO(kraskevich): Come up with a more precise name once we have more than
one usecase.
Defined at line 69 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
bool ShouldFilterDynamicEventNames ()Disclaimer: Experimental method, subject to change. Exposed publicly to
emit some DynamicFilter fields in Chromium only in local tracing.
Defined at line 77 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
template <typename EventType = protos::pbzero::TrackEvent>EventType * event ()Get a TrackEvent message to write typed arguments to.
event() is a template method to allow callers to specify a subclass of
TrackEvent instead. Those subclasses correspond to TrackEvent message with
application-specific extensions. More information in
design-docs/extensions.md.
Defined at line 90 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
template <typename MessageType>TracedProto<MessageType> Wrap (MessageType * message)Convert a raw pointer to protozero message to TracedProto which captures
the reference to this EventContext.
Defined at line 102 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
template <typename EventNameType, typename T>void AddDebugAnnotation (EventNameType && name, T && value)Add a new `debug_annotation` proto message and populate it from |value|
using perfetto::TracedValue API. Users should generally prefer passing
values directly to TRACE_EVENT (i.e. TRACE_EVENT(..., "arg", value, ...);)
but in rare cases (e.g. when an argument should be written conditionally)
EventContext::AddDebugAnnotation provides an explicit equivalent.
Defined at line 115 of file ../../third_party/perfetto/include/perfetto/tracing/event_context.h
void ~EventContext ()TrackEventTlsStateUserData * GetTlsUserData (const void * key)Read arbitrary user data that is associated with the thread-local per
instance state of the track event. `key` must be non-null and unique
per TrackEventTlsStateUserData subclass.
void SetTlsUserData (const void * key, std::unique_ptr<TrackEventTlsStateUserData> data)Set arbitrary user data that is associated with the thread-local per
instance state of the track event. `key` must be non-null and unique
per TrackEventTlsStateUserData subclass.
Friends
class TracedProtoTestclass TrackEventInternaltemplate <typenamesize_ttypenametypename>class TrackEventInternedDataIndex