v8  6.2.414(node8.16.0)
V8 is Google's open source JavaScript engine
TracingController Class Reference

#include <v8-platform.h>

Data Structures

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 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.

Definition at line 60 of file v8-platform.h.

Constructor & Destructor Documentation

◆ ~TracingController()

virtual ~TracingController ( )

Member Function Documentation

◆ AddTraceEvent()

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 

Adds a trace event to the platform tracing system. This function call is 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 this function on its own; it is 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.

Definition at line 84 of file v8-platform.h.

◆ AddTraceStateObserver()

virtual void AddTraceStateObserver ( TraceStateObserver )

Adds tracing state change observer.

Definition at line 109 of file v8-platform.h.

◆ GetCategoryGroupEnabled()

virtual const uint8_t* GetCategoryGroupEnabled ( const char *  name)

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.

Definition at line 71 of file v8-platform.h.

◆ RemoveTraceStateObserver()

virtual void RemoveTraceStateObserver ( TraceStateObserver )

Removes tracing state change observer.

Definition at line 112 of file v8-platform.h.

◆ UpdateTraceEventDuration()

virtual void UpdateTraceEventDuration ( const uint8_t *  category_enabled_flag,
const char *  name,
uint64_t  handle 

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

Definition at line 98 of file v8-platform.h.

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