v8::TracingController Class Reference

#include <v8-platform.h>

Inheritance diagram for v8::TracingController:

Classes
class	TraceStateObserver

Public Member Functions
virtual	~TracingController ()=default
virtual const uint8_t *	GetCategoryGroupEnabled (const char *name)
virtual uint64_t	AddTraceEvent (char phase, const uint8_t *category_enabled_flag, const char *name, const char *scope, uint64_t id, uint64_t bind_id, int32_t num_args, const char **arg_names, const uint8_t *arg_types, const uint64_t *arg_values, std::unique_ptr< ConvertableToTraceFormat > *arg_convertables, unsigned int flags)
virtual uint64_t	AddTraceEventWithTimestamp (char phase, const uint8_t *category_enabled_flag, const char *name, const char *scope, uint64_t id, uint64_t bind_id, int32_t num_args, const char **arg_names, const uint8_t *arg_types, const uint64_t *arg_values, std::unique_ptr< ConvertableToTraceFormat > *arg_convertables, unsigned int flags, int64_t timestamp)
virtual void	UpdateTraceEventDuration (const uint8_t *category_enabled_flag, const char *name, uint64_t handle)
virtual void	AddTraceStateObserver (TraceStateObserver *)
virtual void	RemoveTraceStateObserver (TraceStateObserver *)

Detailed Description

V8 Tracing controller.

Can be implemented by an embedder to record trace events from V8.

Will become obsolete in Perfetto SDK build (v8_use_perfetto = true).

Constructor & Destructor Documentation

~TracingController()

virtual v8::TracingController::~TracingController ( )

virtualdefault

Reimplemented in v8::platform::tracing::TracingController.

Member Function Documentation

AddTraceEvent()

virtual uint64_t v8::TracingController::AddTraceEvent ( char  phase, const uint8_t *  category_enabled_flag, const char *  name, const char *  scope, uint64_t  id, uint64_t  bind_id, int32_t  num_args, const char **  arg_names, const uint8_t *  arg_types, const uint64_t *  arg_values, std::unique_ptr< ConvertableToTraceFormat > *  arg_convertables, unsigned int  flags  )

inlinevirtual

Adds a trace event to the platform tracing system. These function calls are usually the result of a TRACE_* macro from trace_event_common.h when tracing and the category of the particular trace are enabled. It is not advisable to call these functions on their own; they are really only meant to be used by the trace macros. The returned handle can be used by UpdateTraceEventDuration to update the duration of COMPLETE events.

Reimplemented in v8::platform::tracing::TracingController.

AddTraceEventWithTimestamp()

virtual uint64_t v8::TracingController::AddTraceEventWithTimestamp ( char  phase, const uint8_t *  category_enabled_flag, const char *  name, const char *  scope, uint64_t  id, uint64_t  bind_id, int32_t  num_args, const char **  arg_names, const uint8_t *  arg_types, const uint64_t *  arg_values, std::unique_ptr< ConvertableToTraceFormat > *  arg_convertables, unsigned int  flags, int64_t  timestamp  )

inlinevirtual

Reimplemented in v8::platform::tracing::TracingController.

AddTraceStateObserver()

virtual void v8::TracingController::AddTraceStateObserver ( TraceStateObserver *  )

inlinevirtual

Adds tracing state change observer. Does nothing in Perfetto SDK build (v8_use_perfetto = true).

Reimplemented in v8::platform::tracing::TracingController.

GetCategoryGroupEnabled()

virtual const uint8_t * v8::TracingController::GetCategoryGroupEnabled ( const char *  name )

inlinevirtual

Called by TRACE_EVENT* macros, don't call this directly. The name parameter is a category group for example: TRACE_EVENT0("v8,parse", "V8.Parse") The pointer returned points to a value with zero or more of the bits defined in CategoryGroupEnabledFlags.

Reimplemented in v8::platform::tracing::TracingController.

RemoveTraceStateObserver()

virtual void v8::TracingController::RemoveTraceStateObserver ( TraceStateObserver *  )

inlinevirtual

Removes tracing state change observer. Does nothing in Perfetto SDK build (v8_use_perfetto = true).

Reimplemented in v8::platform::tracing::TracingController.

UpdateTraceEventDuration()

virtual void v8::TracingController::UpdateTraceEventDuration ( const uint8_t *  category_enabled_flag, const char *  name, uint64_t  handle  )

inlinevirtual

Sets the duration field of a COMPLETE trace event. It must be called with the handle returned from AddTraceEvent().

Reimplemented in v8::platform::tracing::TracingController.

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The documentation for this class was generated from the following file:

• include/v8-platform.h