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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_TRACING_TRACE_EVENT_H_
#define V8_TRACING_TRACE_EVENT_H_
#include <stddef.h>
#include <memory>
#include "base/trace_event/common/trace_event_common.h"
#include "include/v8-platform.h"
#include "src/base/atomicops.h"
#include "src/base/macros.h"
// This header file defines implementation details of how the trace macros in
// trace_event_common.h collect and store trace events. Anything not
// implementation-specific should go in trace_macros_common.h instead of here.
// The pointer returned from GetCategoryGroupEnabled() points to a
// value with zero or more of the following bits. Used in this class only.
// The TRACE_EVENT macros should only use the value as a bool.
// These values must be in sync with macro values in trace_log.h in
// chromium.
enum CategoryGroupEnabledFlags {
// Category group enabled for the recording mode.
kEnabledForRecording_CategoryGroupEnabledFlags = 1 << 0,
// Category group enabled by SetEventCallbackEnabled().
kEnabledForEventCallback_CategoryGroupEnabledFlags = 1 << 2,
// Category group enabled to export events to ETW.
kEnabledForETWExport_CategoryGroupEnabledFlags = 1 << 3,
};
// TODO(petermarshall): Remove with the old tracing implementation - Perfetto
// copies const char* arguments by default.
// By default, const char* argument values are assumed to have long-lived scope
// and will not be copied. Use this macro to force a const char* to be copied.
#define TRACE_STR_COPY(str) v8::internal::tracing::TraceStringWithCopy(str)
// By default, trace IDs are eventually converted to a single 64-bit number. Use
// this macro to add a scope string.
#define TRACE_ID_WITH_SCOPE(scope, id) \
v8::internal::tracing::TraceID::WithScope(scope, id)
#define INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE() \
TRACE_EVENT_API_LOAD_CATEGORY_GROUP_ENABLED() & \
(kEnabledForRecording_CategoryGroupEnabledFlags | \
kEnabledForEventCallback_CategoryGroupEnabledFlags)
// The following macro has no implementation, but it needs to exist since
// it gets called from scoped trace events. It cannot call UNIMPLEMENTED()
// since an empty implementation is a valid one.
#define INTERNAL_TRACE_MEMORY(category, name)
////////////////////////////////////////////////////////////////////////////////
// Implementation specific tracing API definitions.
// Get a pointer to the enabled state of the given trace category. Only
// long-lived literal strings should be given as the category group. The
// returned pointer can be held permanently in a local static for example. If
// the unsigned char is non-zero, tracing is enabled. If tracing is enabled,
// TRACE_EVENT_API_ADD_TRACE_EVENT can be called. It's OK if tracing is disabled
// between the load of the tracing state and the call to
// TRACE_EVENT_API_ADD_TRACE_EVENT, because this flag only provides an early out
// for best performance when tracing is disabled.
// const uint8_t*
// TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(const char* category_group)
#define TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED \
v8::internal::tracing::TraceEventHelper::GetTracingController() \
->GetCategoryGroupEnabled
// Get the number of times traces have been recorded. This is used to implement
// the TRACE_EVENT_IS_NEW_TRACE facility.
// unsigned int TRACE_EVENT_API_GET_NUM_TRACES_RECORDED()
#define TRACE_EVENT_API_GET_NUM_TRACES_RECORDED UNIMPLEMENTED()
// Add a trace event to the platform tracing system.
// uint64_t TRACE_EVENT_API_ADD_TRACE_EVENT(
// char phase,
// const uint8_t* category_group_enabled,
// const char* name,
// const char* scope,
// uint64_t id,
// uint64_t bind_id,
// int num_args,
// const char** arg_names,
// const uint8_t* arg_types,
// const uint64_t* arg_values,
// unsigned int flags)
#define TRACE_EVENT_API_ADD_TRACE_EVENT v8::internal::tracing::AddTraceEventImpl
// Add a trace event to the platform tracing system.
// uint64_t TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP(
// char phase,
// const uint8_t* category_group_enabled,
// const char* name,
// const char* scope,
// uint64_t id,
// uint64_t bind_id,
// int num_args,
// const char** arg_names,
// const uint8_t* arg_types,
// const uint64_t* arg_values,
// unsigned int flags,
// int64_t timestamp)
#define TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP \
v8::internal::tracing::AddTraceEventWithTimestampImpl
// Set the duration field of a COMPLETE trace event.
// void TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
// const uint8_t* category_group_enabled,
// const char* name,
// uint64_t id)
#define TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION \
v8::internal::tracing::TraceEventHelper::GetTracingController() \
->UpdateTraceEventDuration
// Defines atomic operations used internally by the tracing system.
#define TRACE_EVENT_API_ATOMIC_WORD v8::base::AtomicWord
#define TRACE_EVENT_API_ATOMIC_LOAD(var) v8::base::Relaxed_Load(&(var))
#define TRACE_EVENT_API_ATOMIC_STORE(var, value) \
v8::base::Relaxed_Store(&(var), (value))
#define TRACE_EVENT_API_LOAD_CATEGORY_GROUP_ENABLED() \
v8::base::Relaxed_Load(reinterpret_cast<const v8::base::Atomic8*>( \
INTERNAL_TRACE_EVENT_UID(category_group_enabled)))
////////////////////////////////////////////////////////////////////////////////
// Implementation detail: trace event macros create temporary variables
// to keep instrumentation overhead low. These macros give each temporary
// variable a unique name based on the line number to prevent name collisions.
#define INTERNAL_TRACE_EVENT_UID3(a, b) trace_event_unique_##a##b
#define INTERNAL_TRACE_EVENT_UID2(a, b) INTERNAL_TRACE_EVENT_UID3(a, b)
#define INTERNAL_TRACE_EVENT_UID(name_prefix) \
INTERNAL_TRACE_EVENT_UID2(name_prefix, __LINE__)
// Implementation detail: internal macro to create static category.
// No barriers are needed, because this code is designed to operate safely
// even when the unsigned char* points to garbage data (which may be the case
// on processors without cache coherency).
// TODO(fmeawad): This implementation contradicts that we can have a different
// configuration for each isolate,
// https://code.google.com/p/v8/issues/detail?id=4563
#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO_CUSTOM_VARIABLES( \
category_group, atomic, category_group_enabled) \
category_group_enabled = \
reinterpret_cast<const uint8_t*>(TRACE_EVENT_API_ATOMIC_LOAD(atomic)); \
if (!category_group_enabled) { \
category_group_enabled = \
TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group); \
TRACE_EVENT_API_ATOMIC_STORE( \
atomic, reinterpret_cast<TRACE_EVENT_API_ATOMIC_WORD>( \
category_group_enabled)); \
}
#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group) \
static TRACE_EVENT_API_ATOMIC_WORD INTERNAL_TRACE_EVENT_UID(atomic) = 0; \
const uint8_t* INTERNAL_TRACE_EVENT_UID(category_group_enabled); \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO_CUSTOM_VARIABLES( \
category_group, INTERNAL_TRACE_EVENT_UID(atomic), \
INTERNAL_TRACE_EVENT_UID(category_group_enabled));
// Implementation detail: internal macro to create static category and add
// event if the category is enabled.
#define INTERNAL_TRACE_EVENT_ADD(phase, category_group, name, flags, ...) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
v8::internal::tracing::AddTraceEvent( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
v8::internal::tracing::kGlobalScope, v8::internal::tracing::kNoId, \
v8::internal::tracing::kNoId, flags, ##__VA_ARGS__); \
} \
} while (false)
// Implementation detail: internal macro to create static category and add begin
// event if the category is enabled. Also adds the end event when the scope
// ends.
#define INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name, ...) \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
v8::internal::tracing::ScopedTracer INTERNAL_TRACE_EVENT_UID(tracer); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
uint64_t h = v8::internal::tracing::AddTraceEvent( \
TRACE_EVENT_PHASE_COMPLETE, \
INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
v8::internal::tracing::kGlobalScope, v8::internal::tracing::kNoId, \
v8::internal::tracing::kNoId, TRACE_EVENT_FLAG_NONE, ##__VA_ARGS__); \
INTERNAL_TRACE_EVENT_UID(tracer) \
.Initialize(INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
h); \
}
#define INTERNAL_TRACE_EVENT_ADD_SCOPED_WITH_FLOW(category_group, name, \
bind_id, flow_flags, ...) \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
v8::internal::tracing::ScopedTracer INTERNAL_TRACE_EVENT_UID(tracer); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
unsigned int trace_event_flags = flow_flags; \
v8::internal::tracing::TraceID trace_event_bind_id(bind_id, \
&trace_event_flags); \
uint64_t h = v8::internal::tracing::AddTraceEvent( \
TRACE_EVENT_PHASE_COMPLETE, \
INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
v8::internal::tracing::kGlobalScope, v8::internal::tracing::kNoId, \
trace_event_bind_id.raw_id(), trace_event_flags, ##__VA_ARGS__); \
INTERNAL_TRACE_EVENT_UID(tracer) \
.Initialize(INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
h); \
}
// Implementation detail: internal macro to create static category and add
// event if the category is enabled.
#define INTERNAL_TRACE_EVENT_ADD_WITH_ID(phase, category_group, name, id, \
flags, ...) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
unsigned int trace_event_flags = flags | TRACE_EVENT_FLAG_HAS_ID; \
v8::internal::tracing::TraceID trace_event_trace_id(id, \
&trace_event_flags); \
v8::internal::tracing::AddTraceEvent( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_trace_id.scope(), trace_event_trace_id.raw_id(), \
v8::internal::tracing::kNoId, trace_event_flags, ##__VA_ARGS__); \
} \
} while (false)
// Adds a trace event with a given timestamp.
#define INTERNAL_TRACE_EVENT_ADD_WITH_TIMESTAMP(phase, category_group, name, \
timestamp, flags, ...) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
v8::internal::tracing::AddTraceEventWithTimestamp( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
v8::internal::tracing::kGlobalScope, v8::internal::tracing::kNoId, \
v8::internal::tracing::kNoId, flags, timestamp, ##__VA_ARGS__); \
} \
} while (false)
// Adds a trace event with a given id and timestamp.
#define INTERNAL_TRACE_EVENT_ADD_WITH_ID_AND_TIMESTAMP( \
phase, category_group, name, id, timestamp, flags, ...) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
unsigned int trace_event_flags = flags | TRACE_EVENT_FLAG_HAS_ID; \
v8::internal::tracing::TraceID trace_event_trace_id(id, \
&trace_event_flags); \
v8::internal::tracing::AddTraceEventWithTimestamp( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_trace_id.scope(), trace_event_trace_id.raw_id(), \
v8::internal::tracing::kNoId, trace_event_flags, timestamp, \
##__VA_ARGS__); \
} \
} while (false)
// Adds a trace event with a given id, thread_id, and timestamp. This redirects
// to INTERNAL_TRACE_EVENT_ADD_WITH_ID_AND_TIMESTAMP as we presently do not care
// about the thread id.
#define INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
phase, category_group, name, id, thread_id, timestamp, flags, ...) \
INTERNAL_TRACE_EVENT_ADD_WITH_ID_AND_TIMESTAMP( \
phase, category_group, name, id, timestamp, flags, ##__VA_ARGS__)
#define TRACE_EVENT_CALL_STATS_SCOPED(isolate, category_group, name) \
INTERNAL_TRACE_EVENT_CALL_STATS_SCOPED(isolate, category_group, name)
#define INTERNAL_TRACE_EVENT_CALL_STATS_SCOPED(isolate, category_group, name) \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
v8::internal::tracing::CallStatsScopedTracer INTERNAL_TRACE_EVENT_UID( \
tracer); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
INTERNAL_TRACE_EVENT_UID(tracer) \
.Initialize(isolate, INTERNAL_TRACE_EVENT_UID(category_group_enabled), \
name); \
}
namespace v8 {
namespace internal {
class Isolate;
namespace tracing {
// Specify these values when the corresponding argument of AddTraceEvent is not
// used.
const int kZeroNumArgs = 0;
const decltype(nullptr) kGlobalScope = nullptr;
const uint64_t kNoId = 0;
class TraceEventHelper {
public:
V8_EXPORT_PRIVATE static v8::TracingController* GetTracingController();
};
// TraceID encapsulates an ID that can either be an integer or pointer.
class TraceID {
public:
class WithScope {
public:
WithScope(const char* scope, uint64_t raw_id)
: scope_(scope), raw_id_(raw_id) {}
uint64_t raw_id() const { return raw_id_; }
const char* scope() const { return scope_; }
private:
const char* scope_ = nullptr;
uint64_t raw_id_;
};
TraceID(const void* raw_id, unsigned int* flags)
: raw_id_(static_cast<uint64_t>(reinterpret_cast<uintptr_t>(raw_id))) {}
TraceID(uint64_t raw_id, unsigned int* flags) : raw_id_(raw_id) {
(void)flags;
}
TraceID(unsigned int raw_id, unsigned int* flags) : raw_id_(raw_id) {
(void)flags;
}
TraceID(uint16_t raw_id, unsigned int* flags) : raw_id_(raw_id) {
(void)flags;
}
TraceID(unsigned char raw_id, unsigned int* flags) : raw_id_(raw_id) {
(void)flags;
}
TraceID(int64_t raw_id, unsigned int* flags)
: raw_id_(static_cast<uint64_t>(raw_id)) {
(void)flags;
}
TraceID(int raw_id, unsigned int* flags)
: raw_id_(static_cast<uint64_t>(raw_id)) {
(void)flags;
}
TraceID(int16_t raw_id, unsigned int* flags)
: raw_id_(static_cast<uint64_t>(raw_id)) {
(void)flags;
}
TraceID(signed char raw_id, unsigned int* flags)
: raw_id_(static_cast<uint64_t>(raw_id)) {
(void)flags;
}
TraceID(WithScope scoped_id, unsigned int* flags)
: scope_(scoped_id.scope()), raw_id_(scoped_id.raw_id()) {}
uint64_t raw_id() const { return raw_id_; }
const char* scope() const { return scope_; }
private:
const char* scope_ = nullptr;
uint64_t raw_id_;
};
// Simple container for const char* that should be copied instead of retained.
class TraceStringWithCopy {
public:
explicit TraceStringWithCopy(const char* str) : str_(str) {}
operator const char*() const { return str_; }
private:
const char* str_;
};
static V8_INLINE uint64_t AddTraceEventImpl(
char phase, const uint8_t* category_group_enabled, 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, unsigned int flags) {
std::unique_ptr<ConvertableToTraceFormat> arg_convertables[2];
if (num_args > 0 && arg_types[0] == TRACE_VALUE_TYPE_CONVERTABLE) {
arg_convertables[0].reset(reinterpret_cast<ConvertableToTraceFormat*>(
static_cast<intptr_t>(arg_values[0])));
}
if (num_args > 1 && arg_types[1] == TRACE_VALUE_TYPE_CONVERTABLE) {
arg_convertables[1].reset(reinterpret_cast<ConvertableToTraceFormat*>(
static_cast<intptr_t>(arg_values[1])));
}
DCHECK_LE(num_args, 2);
v8::TracingController* controller =
v8::internal::tracing::TraceEventHelper::GetTracingController();
return controller->AddTraceEvent(phase, category_group_enabled, name, scope,
id, bind_id, num_args, arg_names, arg_types,
arg_values, arg_convertables, flags);
}
static V8_INLINE uint64_t AddTraceEventWithTimestampImpl(
char phase, const uint8_t* category_group_enabled, 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, unsigned int flags, int64_t timestamp) {
std::unique_ptr<ConvertableToTraceFormat> arg_convertables[2];
if (num_args > 0 && arg_types[0] == TRACE_VALUE_TYPE_CONVERTABLE) {
arg_convertables[0].reset(reinterpret_cast<ConvertableToTraceFormat*>(
static_cast<intptr_t>(arg_values[0])));
}
if (num_args > 1 && arg_types[1] == TRACE_VALUE_TYPE_CONVERTABLE) {
arg_convertables[1].reset(reinterpret_cast<ConvertableToTraceFormat*>(
static_cast<intptr_t>(arg_values[1])));
}
DCHECK_LE(num_args, 2);
v8::TracingController* controller =
v8::internal::tracing::TraceEventHelper::GetTracingController();
return controller->AddTraceEventWithTimestamp(
phase, category_group_enabled, name, scope, id, bind_id, num_args,
arg_names, arg_types, arg_values, arg_convertables, flags, timestamp);
}
// Define SetTraceValue for each allowed type. It stores the type and
// value in the return arguments. This allows this API to avoid declaring any
// structures so that it is portable to third_party libraries.
// This is the base implementation for integer types (including bool) and enums.
template <typename T>
static V8_INLINE typename std::enable_if<
std::is_integral<T>::value || std::is_enum<T>::value, void>::type
SetTraceValue(T arg, unsigned char* type, uint64_t* value) {
*type = std::is_same<T, bool>::value
? TRACE_VALUE_TYPE_BOOL
: std::is_signed<T>::value ? TRACE_VALUE_TYPE_INT
: TRACE_VALUE_TYPE_UINT;
*value = static_cast<uint64_t>(arg);
}
#define INTERNAL_DECLARE_SET_TRACE_VALUE(actual_type, value_type_id) \
static V8_INLINE void SetTraceValue(actual_type arg, unsigned char* type, \
uint64_t* value) { \
*type = value_type_id; \
*value = 0; \
STATIC_ASSERT(sizeof(arg) <= sizeof(*value)); \
memcpy(value, &arg, sizeof(arg)); \
}
INTERNAL_DECLARE_SET_TRACE_VALUE(double, TRACE_VALUE_TYPE_DOUBLE)
INTERNAL_DECLARE_SET_TRACE_VALUE(const void*, TRACE_VALUE_TYPE_POINTER)
INTERNAL_DECLARE_SET_TRACE_VALUE(const char*, TRACE_VALUE_TYPE_STRING)
INTERNAL_DECLARE_SET_TRACE_VALUE(const TraceStringWithCopy&,
TRACE_VALUE_TYPE_COPY_STRING)
#undef INTERNAL_DECLARE_SET_TRACE_VALUE
static V8_INLINE void SetTraceValue(ConvertableToTraceFormat* convertable_value,
unsigned char* type, uint64_t* value) {
*type = TRACE_VALUE_TYPE_CONVERTABLE;
*value = static_cast<uint64_t>(reinterpret_cast<intptr_t>(convertable_value));
}
template <typename T>
static V8_INLINE typename std::enable_if<
std::is_convertible<T*, ConvertableToTraceFormat*>::value>::type
SetTraceValue(std::unique_ptr<T> ptr, unsigned char* type, uint64_t* value) {
SetTraceValue(ptr.release(), type, value);
}
// These AddTraceEvent template
// function is defined here instead of in the macro, because the arg_values
// could be temporary objects, such as std::string. In order to store
// pointers to the internal c_str and pass through to the tracing API,
// the arg_values must live throughout these procedures.
static V8_INLINE uint64_t AddTraceEvent(char phase,
const uint8_t* category_group_enabled,
const char* name, const char* scope,
uint64_t id, uint64_t bind_id,
unsigned int flags) {
return TRACE_EVENT_API_ADD_TRACE_EVENT(phase, category_group_enabled, name,
scope, id, bind_id, kZeroNumArgs,
nullptr, nullptr, nullptr, flags);
}
template <class ARG1_TYPE>
static V8_INLINE uint64_t AddTraceEvent(
char phase, const uint8_t* category_group_enabled, const char* name,
const char* scope, uint64_t id, uint64_t bind_id, unsigned int flags,
const char* arg1_name, ARG1_TYPE&& arg1_val) {
const int num_args = 1;
uint8_t arg_type;
uint64_t arg_value;
SetTraceValue(std::forward<ARG1_TYPE>(arg1_val), &arg_type, &arg_value);
return TRACE_EVENT_API_ADD_TRACE_EVENT(
phase, category_group_enabled, name, scope, id, bind_id, num_args,
&arg1_name, &arg_type, &arg_value, flags);
}
template <class ARG1_TYPE, class ARG2_TYPE>
static V8_INLINE uint64_t AddTraceEvent(
char phase, const uint8_t* category_group_enabled, const char* name,
const char* scope, uint64_t id, uint64_t bind_id, unsigned int flags,
const char* arg1_name, ARG1_TYPE&& arg1_val, const char* arg2_name,
ARG2_TYPE&& arg2_val) {
const int num_args = 2;
const char* arg_names[2] = {arg1_name, arg2_name};
unsigned char arg_types[2];
uint64_t arg_values[2];
SetTraceValue(std::forward<ARG1_TYPE>(arg1_val), &arg_types[0],
&arg_values[0]);
SetTraceValue(std::forward<ARG2_TYPE>(arg2_val), &arg_types[1],
&arg_values[1]);
return TRACE_EVENT_API_ADD_TRACE_EVENT(
phase, category_group_enabled, name, scope, id, bind_id, num_args,
arg_names, arg_types, arg_values, flags);
}
static V8_INLINE uint64_t AddTraceEventWithTimestamp(
char phase, const uint8_t* category_group_enabled, const char* name,
const char* scope, uint64_t id, uint64_t bind_id, unsigned int flags,
int64_t timestamp) {
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, kZeroNumArgs,
nullptr, nullptr, nullptr, flags, timestamp);
}
template <class ARG1_TYPE>
static V8_INLINE uint64_t AddTraceEventWithTimestamp(
char phase, const uint8_t* category_group_enabled, const char* name,
const char* scope, uint64_t id, uint64_t bind_id, unsigned int flags,
int64_t timestamp, const char* arg1_name, ARG1_TYPE&& arg1_val) {
const int num_args = 1;
uint8_t arg_type;
uint64_t arg_value;
SetTraceValue(std::forward<ARG1_TYPE>(arg1_val), &arg_type, &arg_value);
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, num_args,
&arg1_name, &arg_type, &arg_value, flags, timestamp);
}
template <class ARG1_TYPE, class ARG2_TYPE>
static V8_INLINE uint64_t AddTraceEventWithTimestamp(
char phase, const uint8_t* category_group_enabled, const char* name,
const char* scope, uint64_t id, uint64_t bind_id, unsigned int flags,
int64_t timestamp, const char* arg1_name, ARG1_TYPE&& arg1_val,
const char* arg2_name, ARG2_TYPE&& arg2_val) {
const int num_args = 2;
const char* arg_names[2] = {arg1_name, arg2_name};
unsigned char arg_types[2];
uint64_t arg_values[2];
SetTraceValue(std::forward<ARG1_TYPE>(arg1_val), &arg_types[0],
&arg_values[0]);
SetTraceValue(std::forward<ARG2_TYPE>(arg2_val), &arg_types[1],
&arg_values[1]);
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, num_args,
arg_names, arg_types, arg_values, flags, timestamp);
}
// Used by TRACE_EVENTx macros. Do not use directly.
class ScopedTracer {
public:
// Note: members of data_ intentionally left uninitialized. See Initialize.
ScopedTracer() : p_data_(nullptr) {}
~ScopedTracer() {
if (p_data_ && base::Relaxed_Load(reinterpret_cast<const base::Atomic8*>(
data_.category_group_enabled))) {
TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
data_.category_group_enabled, data_.name, data_.event_handle);
}
}
void Initialize(const uint8_t* category_group_enabled, const char* name,
uint64_t event_handle) {
data_.category_group_enabled = category_group_enabled;
data_.name = name;
data_.event_handle = event_handle;
p_data_ = &data_;
}
private:
// This Data struct workaround is to avoid initializing all the members
// in Data during construction of this object, since this object is always
// constructed, even when tracing is disabled. If the members of Data were
// members of this class instead, compiler warnings occur about potential
// uninitialized accesses.
struct Data {
const uint8_t* category_group_enabled;
const char* name;
uint64_t event_handle;
};
Data* p_data_;
Data data_;
};
// Do not use directly.
class CallStatsScopedTracer {
public:
CallStatsScopedTracer() : p_data_(nullptr) {}
~CallStatsScopedTracer() {
if (V8_UNLIKELY(p_data_ && *data_.category_group_enabled)) {
AddEndTraceEvent();
}
}
void Initialize(v8::internal::Isolate* isolate,
const uint8_t* category_group_enabled, const char* name);
private:
void AddEndTraceEvent();
struct Data {
const uint8_t* category_group_enabled;
const char* name;
v8::internal::Isolate* isolate;
};
bool has_parent_scope_;
Data* p_data_;
Data data_;
};
} // namespace tracing
} // namespace internal
} // namespace v8
#endif // V8_TRACING_TRACE_EVENT_H_