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naiveproxy/base/trace_event/trace_event.h
klzgrad 19bc836227 Import chromium-63.0.3239.132
2018-01-29 00:30:36 +08:00

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// Copyright (c) 2012 The Chromium 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 BASE_TRACE_EVENT_TRACE_EVENT_H_
#define BASE_TRACE_EVENT_TRACE_EVENT_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_event_common.h instead of here.
#include <stddef.h>
#include <stdint.h>
#include <string>
#include "base/atomicops.h"
#include "base/debug/debugging_flags.h"
#include "base/macros.h"
#include "base/time/time.h"
#include "base/trace_event/common/trace_event_common.h"
#include "base/trace_event/heap_profiler.h"
#include "base/trace_event/trace_category.h"
#include "base/trace_event/trace_event_system_stats_monitor.h"
#include "base/trace_event/trace_log.h"
#include "build/build_config.h"
// 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) \
trace_event_internal::TraceStringWithCopy(str)
// DEPRECATED: do not use: Consider using TRACE_ID_{GLOBAL, LOCAL} macros,
// instead. By default, uint64_t ID argument values are not mangled with the
// Process ID in TRACE_EVENT_ASYNC macros. Use this macro to force Process ID
// mangling.
#define TRACE_ID_MANGLE(id) \
trace_event_internal::TraceID::ForceMangle(id)
// DEPRECATED: do not use: Consider using TRACE_ID_{GLOBAL, LOCAL} macros,
// instead. By default, pointers are mangled with the Process ID in
// TRACE_EVENT_ASYNC macros. Use this macro to prevent Process ID mangling.
#define TRACE_ID_DONT_MANGLE(id) \
trace_event_internal::TraceID::DontMangle(id)
// By default, trace IDs are eventually converted to a single 64-bit number. Use
// this macro to add a scope string. For example,
//
// TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(
// "network", "ResourceLoad",
// TRACE_ID_WITH_SCOPE("BlinkResourceID", resourceID));
//
// Also, it is possible to prepend the ID with another number, like the process
// ID. This is useful in creating IDs that are unique among all processes. To do
// that, pass two numbers after the scope string instead of one. For example,
//
// TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(
// "network", "ResourceLoad",
// TRACE_ID_WITH_SCOPE("BlinkResourceID", pid, resourceID));
#define TRACE_ID_WITH_SCOPE(scope, ...) \
trace_event_internal::TraceID::WithScope(scope, ##__VA_ARGS__)
#define TRACE_ID_GLOBAL(id) trace_event_internal::TraceID::GlobalId(id)
#define TRACE_ID_LOCAL(id) trace_event_internal::TraceID::LocalId(id)
#define TRACE_EVENT_API_CURRENT_THREAD_ID \
static_cast<int>(base::PlatformThread::CurrentId())
#define INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE() \
UNLIKELY(*INTERNAL_TRACE_EVENT_UID(category_group_enabled) & \
(base::trace_event::TraceCategory::ENABLED_FOR_RECORDING | \
base::trace_event::TraceCategory::ENABLED_FOR_ETW_EXPORT))
#define INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED() \
UNLIKELY(*INTERNAL_TRACE_EVENT_UID(category_group_enabled) & \
(base::trace_event::TraceCategory::ENABLED_FOR_RECORDING | \
base::trace_event::TraceCategory::ENABLED_FOR_ETW_EXPORT | \
base::trace_event::TraceCategory::ENABLED_FOR_FILTERING))
////////////////////////////////////////////////////////////////////////////////
// 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 unsigned char*
// TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(const char* category_group)
#define TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED \
base::trace_event::TraceLog::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 \
base::trace_event::TraceLog::GetInstance()->GetNumTracesRecorded
// Add a trace event to the platform tracing system.
// base::trace_event::TraceEventHandle TRACE_EVENT_API_ADD_TRACE_EVENT(
// char phase,
// const unsigned char* category_group_enabled,
// const char* name,
// const char* scope,
// unsigned long long id,
// int num_args,
// const char** arg_names,
// const unsigned char* arg_types,
// const unsigned long long* arg_values,
// std::unique_ptr<ConvertableToTraceFormat>*
// convertable_values,
// unsigned int flags)
#define TRACE_EVENT_API_ADD_TRACE_EVENT \
base::trace_event::TraceLog::GetInstance()->AddTraceEvent
// Add a trace event to the platform tracing system.
// base::trace_event::TraceEventHandle
// TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_BIND_ID(
// char phase,
// const unsigned char* category_group_enabled,
// const char* name,
// const char* scope,
// unsigned long long id,
// unsigned long long bind_id,
// int num_args,
// const char** arg_names,
// const unsigned char* arg_types,
// const unsigned long long* arg_values,
// std::unique_ptr<ConvertableToTraceFormat>*
// convertable_values,
// unsigned int flags)
#define TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_BIND_ID \
base::trace_event::TraceLog::GetInstance()->AddTraceEventWithBindId
// Add a trace event to the platform tracing system overriding the pid.
// The resulting event will have tid = pid == (process_id passed here).
// base::trace_event::TraceEventHandle
// TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_PROCESS_ID(
// char phase,
// const unsigned char* category_group_enabled,
// const char* name,
// const char* scope,
// unsigned long long id,
// int process_id,
// int num_args,
// const char** arg_names,
// const unsigned char* arg_types,
// const unsigned long long* arg_values,
// std::unique_ptr<ConvertableToTraceFormat>*
// convertable_values,
// unsigned int flags)
#define TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_PROCESS_ID \
base::trace_event::TraceLog::GetInstance()->AddTraceEventWithProcessId
// Add a trace event to the platform tracing system.
// base::trace_event::TraceEventHandle
// TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP(
// char phase,
// const unsigned char* category_group_enabled,
// const char* name,
// const char* scope,
// unsigned long long id,
// int thread_id,
// const TimeTicks& timestamp,
// int num_args,
// const char** arg_names,
// const unsigned char* arg_types,
// const unsigned long long* arg_values,
// std::unique_ptr<ConvertableToTraceFormat>*
// convertable_values,
// unsigned int flags)
#define TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP \
base::trace_event::TraceLog::GetInstance() \
->AddTraceEventWithThreadIdAndTimestamp
// Set the duration field of a COMPLETE trace event.
// void TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
// const unsigned char* category_group_enabled,
// const char* name,
// base::trace_event::TraceEventHandle id)
#define TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION \
base::trace_event::TraceLog::GetInstance()->UpdateTraceEventDuration
// Set the duration field of a COMPLETE trace event.
// void TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION_EXPLICIT(
// const unsigned char* category_group_enabled,
// const char* name,
// base::trace_event::TraceEventHandle id,
// const TimeTicks& now,
// const ThreadTicks* thread_now)
#define TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION_EXPLICIT \
base::trace_event::TraceLog::GetInstance()->UpdateTraceEventDurationExplicit
// Adds a metadata event to the trace log. The |AppendValueAsTraceFormat| method
// on the convertable value will be called at flush time.
// TRACE_EVENT_API_ADD_METADATA_EVENT(
// const unsigned char* category_group_enabled,
// const char* event_name,
// const char* arg_name,
// std::unique_ptr<ConvertableToTraceFormat> arg_value)
#define TRACE_EVENT_API_ADD_METADATA_EVENT \
trace_event_internal::AddMetadataEvent
// Defines atomic operations used internally by the tracing system.
#define TRACE_EVENT_API_ATOMIC_WORD base::subtle::AtomicWord
#define TRACE_EVENT_API_ATOMIC_LOAD(var) base::subtle::NoBarrier_Load(&(var))
#define TRACE_EVENT_API_ATOMIC_STORE(var, value) \
base::subtle::NoBarrier_Store(&(var), (value))
// Defines visibility for classes in trace_event.h
#define TRACE_EVENT_API_CLASS_EXPORT BASE_EXPORT
////////////////////////////////////////////////////////////////////////////////
// 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).
#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO_CUSTOM_VARIABLES( \
category_group, atomic, category_group_enabled) \
category_group_enabled = \
reinterpret_cast<const unsigned char*>(TRACE_EVENT_API_ATOMIC_LOAD( \
atomic)); \
if (UNLIKELY(!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 unsigned char* 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()) { \
trace_event_internal::AddTraceEvent( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_internal::kGlobalScope, trace_event_internal::kNoId, \
flags, trace_event_internal::kNoId, ##__VA_ARGS__); \
} \
} while (0)
// 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); \
trace_event_internal::ScopedTracer INTERNAL_TRACE_EVENT_UID(tracer); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED()) { \
base::trace_event::TraceEventHandle h = \
trace_event_internal::AddTraceEvent( \
TRACE_EVENT_PHASE_COMPLETE, \
INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_internal::kGlobalScope, trace_event_internal::kNoId, \
TRACE_EVENT_FLAG_NONE, trace_event_internal::kNoId, \
##__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); \
trace_event_internal::ScopedTracer INTERNAL_TRACE_EVENT_UID(tracer); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED()) { \
trace_event_internal::TraceID trace_event_bind_id((bind_id)); \
unsigned int trace_event_flags = \
flow_flags | trace_event_bind_id.id_flags(); \
base::trace_event::TraceEventHandle h = \
trace_event_internal::AddTraceEvent( \
TRACE_EVENT_PHASE_COMPLETE, \
INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_internal::kGlobalScope, trace_event_internal::kNoId, \
trace_event_flags, trace_event_bind_id.raw_id(), ##__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()) { \
trace_event_internal::TraceID trace_event_trace_id((id)); \
unsigned int trace_event_flags = \
flags | trace_event_trace_id.id_flags(); \
trace_event_internal::AddTraceEvent( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_trace_id.scope(), trace_event_trace_id.raw_id(), \
trace_event_flags, trace_event_internal::kNoId, ##__VA_ARGS__); \
} \
} while (0)
// Implementation detail: internal macro to create static category and add
// event if the category is enabled.
#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()) { \
trace_event_internal::AddTraceEventWithThreadIdAndTimestamp( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_internal::kGlobalScope, trace_event_internal::kNoId, \
TRACE_EVENT_API_CURRENT_THREAD_ID, timestamp, \
flags | TRACE_EVENT_FLAG_EXPLICIT_TIMESTAMP, \
trace_event_internal::kNoId, ##__VA_ARGS__); \
} \
} while (0)
// Implementation detail: internal macro to create static category and add
// event if the category is enabled.
#define INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
phase, category_group, name, id, thread_id, timestamp, flags, ...) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED()) { \
trace_event_internal::TraceID trace_event_trace_id((id)); \
unsigned int trace_event_flags = \
flags | trace_event_trace_id.id_flags(); \
trace_event_internal::AddTraceEventWithThreadIdAndTimestamp( \
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
trace_event_trace_id.scope(), trace_event_trace_id.raw_id(), \
thread_id, timestamp, \
trace_event_flags | TRACE_EVENT_FLAG_EXPLICIT_TIMESTAMP, \
trace_event_internal::kNoId, ##__VA_ARGS__); \
} \
} while (0)
// Implementation detail: internal macro to create static category and add
// event if the category is enabled.
#define INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMPS( \
category_group, name, id, thread_id, begin_timestamp, end_timestamp, \
thread_end_timestamp, flags, ...) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED()) { \
trace_event_internal::TraceID trace_event_trace_id((id)); \
unsigned int trace_event_flags = \
flags | trace_event_trace_id.id_flags(); \
const unsigned char* uid_category_group_enabled = \
INTERNAL_TRACE_EVENT_UID(category_group_enabled); \
auto handle = \
trace_event_internal::AddTraceEventWithThreadIdAndTimestamp( \
TRACE_EVENT_PHASE_COMPLETE, uid_category_group_enabled, name, \
trace_event_trace_id.scope(), trace_event_trace_id.raw_id(), \
thread_id, begin_timestamp, \
trace_event_flags | TRACE_EVENT_FLAG_EXPLICIT_TIMESTAMP, \
trace_event_internal::kNoId, ##__VA_ARGS__); \
TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION_EXPLICIT( \
uid_category_group_enabled, name, handle, end_timestamp, \
thread_end_timestamp); \
} \
} while (0)
// The linked ID will not be mangled.
#define INTERNAL_TRACE_EVENT_ADD_LINK_IDS(category_group, name, id1, id2) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED()) { \
trace_event_internal::TraceID source_id((id1)); \
unsigned int source_flags = source_id.id_flags(); \
trace_event_internal::TraceID target_id((id2)); \
trace_event_internal::AddTraceEvent( \
TRACE_EVENT_PHASE_LINK_IDS, \
INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
source_id.scope(), source_id.raw_id(), source_flags, \
trace_event_internal::kNoId, "linked_id", \
target_id.AsConvertableToTraceFormat()); \
} \
} while (0)
// Implementation detail: internal macro to create static category and add
// metadata event if the category is enabled.
#define INTERNAL_TRACE_EVENT_METADATA_ADD(category_group, name, ...) \
do { \
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED()) { \
TRACE_EVENT_API_ADD_METADATA_EVENT( \
INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
##__VA_ARGS__); \
} \
} while (0)
// Implementation detail: internal macro to enter and leave a
// context based on the current scope.
#define INTERNAL_TRACE_EVENT_SCOPED_CONTEXT(category_group, name, context) \
struct INTERNAL_TRACE_EVENT_UID(ScopedContext) { \
public: \
INTERNAL_TRACE_EVENT_UID(ScopedContext)(uint64_t cid) : cid_(cid) { \
TRACE_EVENT_ENTER_CONTEXT(category_group, name, cid_); \
} \
~INTERNAL_TRACE_EVENT_UID(ScopedContext)() { \
TRACE_EVENT_LEAVE_CONTEXT(category_group, name, cid_); \
} \
\
private: \
uint64_t cid_; \
/* Local class friendly DISALLOW_COPY_AND_ASSIGN */ \
INTERNAL_TRACE_EVENT_UID(ScopedContext) \
(const INTERNAL_TRACE_EVENT_UID(ScopedContext)&) {}; \
void operator=(const INTERNAL_TRACE_EVENT_UID(ScopedContext)&) {}; \
}; \
INTERNAL_TRACE_EVENT_UID(ScopedContext) \
INTERNAL_TRACE_EVENT_UID(scoped_context)(context);
#if BUILDFLAG(ENABLE_LOCATION_SOURCE)
// Implementation detail: internal macro to trace a task execution with the
// location where it was posted from.
//
// This implementation is for when location sources are available.
#define INTERNAL_TRACE_TASK_EXECUTION(run_function, task) \
TRACE_EVENT2("toplevel", run_function, "src_file", \
(task).posted_from.file_name(), "src_func", \
(task).posted_from.function_name()); \
TRACE_HEAP_PROFILER_API_SCOPED_TASK_EXECUTION INTERNAL_TRACE_EVENT_UID( \
task_event)((task).posted_from.file_name());
#else
// TODO(http://crbug.com760702) remove file name and just pass the program
// counter to the heap profiler macro.
#define INTERNAL_TRACE_TASK_EXECUTION(run_function, task) \
TRACE_EVENT1("toplevel", run_function, "src", (task).posted_from.ToString()) \
TRACE_HEAP_PROFILER_API_SCOPED_TASK_EXECUTION INTERNAL_TRACE_EVENT_UID( \
task_event)((task).posted_from.file_name());
#endif
namespace trace_event_internal {
// Specify these values when the corresponding argument of AddTraceEvent is not
// used.
const int kZeroNumArgs = 0;
const std::nullptr_t kGlobalScope = nullptr;
const unsigned long long kNoId = 0;
// TraceID encapsulates an ID that can either be an integer or pointer. Pointers
// are by default mangled with the Process ID so that they are unlikely to
// collide when the same pointer is used on different processes.
class BASE_EXPORT TraceID {
public:
// Can be combined with WithScope.
class LocalId {
public:
explicit LocalId(const void* raw_id)
: raw_id_(static_cast<unsigned long long>(
reinterpret_cast<uintptr_t>(raw_id))) {}
explicit LocalId(unsigned long long raw_id) : raw_id_(raw_id) {}
unsigned long long raw_id() const { return raw_id_; }
private:
unsigned long long raw_id_;
};
// Can be combined with WithScope.
class GlobalId {
public:
explicit GlobalId(unsigned long long raw_id) : raw_id_(raw_id) {}
unsigned long long raw_id() const { return raw_id_; }
private:
unsigned long long raw_id_;
};
class WithScope {
public:
WithScope(const char* scope, unsigned long long raw_id)
: scope_(scope), raw_id_(raw_id) {}
WithScope(const char* scope, LocalId local_id)
: scope_(scope), raw_id_(local_id.raw_id()) {
id_flags_ = TRACE_EVENT_FLAG_HAS_LOCAL_ID;
}
WithScope(const char* scope, GlobalId global_id)
: scope_(scope), raw_id_(global_id.raw_id()) {
id_flags_ = TRACE_EVENT_FLAG_HAS_GLOBAL_ID;
}
WithScope(const char* scope,
unsigned long long prefix,
unsigned long long raw_id)
: scope_(scope), has_prefix_(true), prefix_(prefix), raw_id_(raw_id) {}
WithScope(const char* scope, unsigned long long prefix, GlobalId global_id)
: scope_(scope),
has_prefix_(true),
prefix_(prefix),
raw_id_(global_id.raw_id()) {
id_flags_ = TRACE_EVENT_FLAG_HAS_GLOBAL_ID;
}
unsigned long long raw_id() const { return raw_id_; }
const char* scope() const { return scope_; }
bool has_prefix() const { return has_prefix_; }
unsigned long long prefix() const { return prefix_; }
unsigned int id_flags() const { return id_flags_; }
private:
const char* scope_ = nullptr;
bool has_prefix_ = false;
unsigned long long prefix_;
unsigned long long raw_id_;
unsigned int id_flags_ = TRACE_EVENT_FLAG_HAS_ID;
};
// DEPRECATED: consider using LocalId or GlobalId, instead.
class DontMangle {
public:
explicit DontMangle(const void* raw_id)
: raw_id_(static_cast<unsigned long long>(
reinterpret_cast<uintptr_t>(raw_id))) {}
explicit DontMangle(unsigned long long raw_id) : raw_id_(raw_id) {}
explicit DontMangle(unsigned long raw_id) : raw_id_(raw_id) {}
explicit DontMangle(unsigned int raw_id) : raw_id_(raw_id) {}
explicit DontMangle(unsigned short raw_id) : raw_id_(raw_id) {}
explicit DontMangle(unsigned char raw_id) : raw_id_(raw_id) {}
explicit DontMangle(long long raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit DontMangle(long raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit DontMangle(int raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit DontMangle(short raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit DontMangle(signed char raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
unsigned long long raw_id() const { return raw_id_; }
private:
unsigned long long raw_id_;
};
// DEPRECATED: consider using LocalId or GlobalId, instead.
class ForceMangle {
public:
explicit ForceMangle(unsigned long long raw_id) : raw_id_(raw_id) {}
explicit ForceMangle(unsigned long raw_id) : raw_id_(raw_id) {}
explicit ForceMangle(unsigned int raw_id) : raw_id_(raw_id) {}
explicit ForceMangle(unsigned short raw_id) : raw_id_(raw_id) {}
explicit ForceMangle(unsigned char raw_id) : raw_id_(raw_id) {}
explicit ForceMangle(long long raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit ForceMangle(long raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit ForceMangle(int raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit ForceMangle(short raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
explicit ForceMangle(signed char raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
unsigned long long raw_id() const { return raw_id_; }
private:
unsigned long long raw_id_;
};
TraceID(const void* raw_id) : raw_id_(static_cast<unsigned long long>(
reinterpret_cast<uintptr_t>(raw_id))) {
id_flags_ = TRACE_EVENT_FLAG_HAS_ID | TRACE_EVENT_FLAG_MANGLE_ID;
}
TraceID(ForceMangle raw_id) : raw_id_(raw_id.raw_id()) {
id_flags_ = TRACE_EVENT_FLAG_HAS_ID | TRACE_EVENT_FLAG_MANGLE_ID;
}
TraceID(DontMangle raw_id) : raw_id_(raw_id.raw_id()) {}
TraceID(unsigned long long raw_id) : raw_id_(raw_id) {}
TraceID(unsigned long raw_id) : raw_id_(raw_id) {}
TraceID(unsigned int raw_id) : raw_id_(raw_id) {}
TraceID(unsigned short raw_id) : raw_id_(raw_id) {}
TraceID(unsigned char raw_id) : raw_id_(raw_id) {}
TraceID(long long raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
TraceID(long raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
TraceID(int raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
TraceID(short raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
TraceID(signed char raw_id)
: raw_id_(static_cast<unsigned long long>(raw_id)) {}
TraceID(LocalId raw_id) : raw_id_(raw_id.raw_id()) {
id_flags_ = TRACE_EVENT_FLAG_HAS_LOCAL_ID;
}
TraceID(GlobalId raw_id) : raw_id_(raw_id.raw_id()) {
id_flags_ = TRACE_EVENT_FLAG_HAS_GLOBAL_ID;
}
TraceID(WithScope scoped_id)
: scope_(scoped_id.scope()),
has_prefix_(scoped_id.has_prefix()),
prefix_(scoped_id.prefix()),
raw_id_(scoped_id.raw_id()),
id_flags_(scoped_id.id_flags()) {}
unsigned long long raw_id() const { return raw_id_; }
const char* scope() const { return scope_; }
bool has_prefix() const { return has_prefix_; }
unsigned long long prefix() const { return prefix_; }
unsigned int id_flags() const { return id_flags_; }
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
AsConvertableToTraceFormat() const;
private:
const char* scope_ = nullptr;
bool has_prefix_ = false;
unsigned long long prefix_;
unsigned long long raw_id_;
unsigned int id_flags_ = TRACE_EVENT_FLAG_HAS_ID;
};
// Simple union to store various types as unsigned long long.
union TraceValueUnion {
bool as_bool;
unsigned long long as_uint;
long long as_int;
double as_double;
const void* as_pointer;
const char* as_string;
};
// Simple container for const char* that should be copied instead of retained.
class TraceStringWithCopy {
public:
explicit TraceStringWithCopy(const char* str) : str_(str) {}
const char* str() const { return str_; }
private:
const char* str_;
};
// 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.
#define INTERNAL_DECLARE_SET_TRACE_VALUE(actual_type, \
arg_expression, \
union_member, \
value_type_id) \
static inline void SetTraceValue( \
actual_type arg, \
unsigned char* type, \
unsigned long long* value) { \
TraceValueUnion type_value; \
type_value.union_member = arg_expression; \
*type = value_type_id; \
*value = type_value.as_uint; \
}
// Simpler form for int types that can be safely casted.
#define INTERNAL_DECLARE_SET_TRACE_VALUE_INT(actual_type, \
value_type_id) \
static inline void SetTraceValue( \
actual_type arg, \
unsigned char* type, \
unsigned long long* value) { \
*type = value_type_id; \
*value = static_cast<unsigned long long>(arg); \
}
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned long long, TRACE_VALUE_TYPE_UINT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned long, TRACE_VALUE_TYPE_UINT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned int, TRACE_VALUE_TYPE_UINT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned short, TRACE_VALUE_TYPE_UINT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned char, TRACE_VALUE_TYPE_UINT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(long long, TRACE_VALUE_TYPE_INT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(long, TRACE_VALUE_TYPE_INT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(int, TRACE_VALUE_TYPE_INT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(short, TRACE_VALUE_TYPE_INT)
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(signed char, TRACE_VALUE_TYPE_INT)
INTERNAL_DECLARE_SET_TRACE_VALUE(bool, arg, as_bool, TRACE_VALUE_TYPE_BOOL)
INTERNAL_DECLARE_SET_TRACE_VALUE(double, arg, as_double,
TRACE_VALUE_TYPE_DOUBLE)
INTERNAL_DECLARE_SET_TRACE_VALUE(const void*, arg, as_pointer,
TRACE_VALUE_TYPE_POINTER)
INTERNAL_DECLARE_SET_TRACE_VALUE(const char*, arg, as_string,
TRACE_VALUE_TYPE_STRING)
INTERNAL_DECLARE_SET_TRACE_VALUE(const TraceStringWithCopy&, arg.str(),
as_string, TRACE_VALUE_TYPE_COPY_STRING)
#undef INTERNAL_DECLARE_SET_TRACE_VALUE
#undef INTERNAL_DECLARE_SET_TRACE_VALUE_INT
// std::string version of SetTraceValue so that trace arguments can be strings.
static inline void SetTraceValue(const std::string& arg,
unsigned char* type,
unsigned long long* value) {
TraceValueUnion type_value;
type_value.as_string = arg.c_str();
*type = TRACE_VALUE_TYPE_COPY_STRING;
*value = type_value.as_uint;
}
// base::Time, base::TimeTicks, etc. versions of SetTraceValue to make it easier
// to trace these types.
static inline void SetTraceValue(const base::Time arg,
unsigned char* type,
unsigned long long* value) {
*type = TRACE_VALUE_TYPE_INT;
*value = arg.ToInternalValue();
}
static inline void SetTraceValue(const base::TimeTicks arg,
unsigned char* type,
unsigned long long* value) {
*type = TRACE_VALUE_TYPE_INT;
*value = arg.ToInternalValue();
}
static inline void SetTraceValue(const base::ThreadTicks arg,
unsigned char* type,
unsigned long long* value) {
*type = TRACE_VALUE_TYPE_INT;
*value = arg.ToInternalValue();
}
// These AddTraceEvent and AddTraceEventWithThreadIdAndTimestamp template
// functions are 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.
template <class ARG1_CONVERTABLE_TYPE>
static inline base::trace_event::TraceEventHandle
AddTraceEventWithThreadIdAndTimestamp(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
int thread_id,
const base::TimeTicks& timestamp,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
std::unique_ptr<ARG1_CONVERTABLE_TYPE> arg1_val) {
const int num_args = 1;
unsigned char arg_types[1] = { TRACE_VALUE_TYPE_CONVERTABLE };
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
convertable_values[1] = {std::move(arg1_val)};
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, thread_id,
timestamp, num_args, &arg1_name, arg_types, NULL, convertable_values,
flags);
}
template <class ARG1_TYPE, class ARG2_CONVERTABLE_TYPE>
static inline base::trace_event::TraceEventHandle
AddTraceEventWithThreadIdAndTimestamp(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
int thread_id,
const base::TimeTicks& timestamp,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
const ARG1_TYPE& arg1_val,
const char* arg2_name,
std::unique_ptr<ARG2_CONVERTABLE_TYPE> arg2_val) {
const int num_args = 2;
const char* arg_names[2] = { arg1_name, arg2_name };
unsigned char arg_types[2];
unsigned long long arg_values[2];
SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]);
arg_types[1] = TRACE_VALUE_TYPE_CONVERTABLE;
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
convertable_values[2] = {nullptr, std::move(arg2_val)};
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, thread_id,
timestamp, num_args, arg_names, arg_types, arg_values, convertable_values,
flags);
}
template <class ARG1_CONVERTABLE_TYPE, class ARG2_TYPE>
static inline base::trace_event::TraceEventHandle
AddTraceEventWithThreadIdAndTimestamp(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
int thread_id,
const base::TimeTicks& timestamp,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
std::unique_ptr<ARG1_CONVERTABLE_TYPE> arg1_val,
const char* arg2_name,
const ARG2_TYPE& arg2_val) {
const int num_args = 2;
const char* arg_names[2] = { arg1_name, arg2_name };
unsigned char arg_types[2];
unsigned long long arg_values[2];
arg_types[0] = TRACE_VALUE_TYPE_CONVERTABLE;
arg_values[0] = 0;
SetTraceValue(arg2_val, &arg_types[1], &arg_values[1]);
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
convertable_values[2] = {std::move(arg1_val), nullptr};
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, thread_id,
timestamp, num_args, arg_names, arg_types, arg_values, convertable_values,
flags);
}
template <class ARG1_CONVERTABLE_TYPE, class ARG2_CONVERTABLE_TYPE>
static inline base::trace_event::TraceEventHandle
AddTraceEventWithThreadIdAndTimestamp(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
int thread_id,
const base::TimeTicks& timestamp,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
std::unique_ptr<ARG1_CONVERTABLE_TYPE> arg1_val,
const char* arg2_name,
std::unique_ptr<ARG2_CONVERTABLE_TYPE> arg2_val) {
const int num_args = 2;
const char* arg_names[2] = { arg1_name, arg2_name };
unsigned char arg_types[2] =
{ TRACE_VALUE_TYPE_CONVERTABLE, TRACE_VALUE_TYPE_CONVERTABLE };
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
convertable_values[2] = {std::move(arg1_val), std::move(arg2_val)};
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, thread_id,
timestamp, num_args, arg_names, arg_types, NULL, convertable_values,
flags);
}
static inline base::trace_event::TraceEventHandle
AddTraceEventWithThreadIdAndTimestamp(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
int thread_id,
const base::TimeTicks& timestamp,
unsigned int flags,
unsigned long long bind_id) {
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, thread_id,
timestamp, kZeroNumArgs, NULL, NULL, NULL, NULL, flags);
}
static inline base::trace_event::TraceEventHandle AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
unsigned int flags,
unsigned long long bind_id) {
const int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
const base::TimeTicks now = base::TimeTicks::Now();
return AddTraceEventWithThreadIdAndTimestamp(
phase, category_group_enabled, name, scope, id, thread_id, now, flags,
bind_id);
}
template<class ARG1_TYPE>
static inline base::trace_event::TraceEventHandle
AddTraceEventWithThreadIdAndTimestamp(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
int thread_id,
const base::TimeTicks& timestamp,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
const ARG1_TYPE& arg1_val) {
const int num_args = 1;
unsigned char arg_types[1];
unsigned long long arg_values[1];
SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]);
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, thread_id,
timestamp, num_args, &arg1_name, arg_types, arg_values, NULL, flags);
}
template<class ARG1_TYPE>
static inline base::trace_event::TraceEventHandle AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
const ARG1_TYPE& arg1_val) {
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
base::TimeTicks now = base::TimeTicks::Now();
return AddTraceEventWithThreadIdAndTimestamp(
phase, category_group_enabled, name, scope, id, thread_id, now, flags,
bind_id, arg1_name, arg1_val);
}
template <class ARG1_CONVERTABLE_TYPE>
static inline base::trace_event::TraceEventHandle AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
std::unique_ptr<ARG1_CONVERTABLE_TYPE> arg1_val) {
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
base::TimeTicks now = base::TimeTicks::Now();
return AddTraceEventWithThreadIdAndTimestamp(
phase, category_group_enabled, name, scope, id, thread_id, now, flags,
bind_id, arg1_name, std::move(arg1_val));
}
template<class ARG1_TYPE, class ARG2_TYPE>
static inline base::trace_event::TraceEventHandle
AddTraceEventWithThreadIdAndTimestamp(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
int thread_id,
const base::TimeTicks& timestamp,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
const ARG1_TYPE& arg1_val,
const char* arg2_name,
const ARG2_TYPE& arg2_val) {
const int num_args = 2;
const char* arg_names[2] = { arg1_name, arg2_name };
unsigned char arg_types[2];
unsigned long long arg_values[2];
SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]);
SetTraceValue(arg2_val, &arg_types[1], &arg_values[1]);
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
phase, category_group_enabled, name, scope, id, bind_id, thread_id,
timestamp, num_args, arg_names, arg_types, arg_values, NULL, flags);
}
template <class ARG1_CONVERTABLE_TYPE, class ARG2_TYPE>
static inline base::trace_event::TraceEventHandle AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
std::unique_ptr<ARG1_CONVERTABLE_TYPE> arg1_val,
const char* arg2_name,
const ARG2_TYPE& arg2_val) {
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
base::TimeTicks now = base::TimeTicks::Now();
return AddTraceEventWithThreadIdAndTimestamp(
phase, category_group_enabled, name, scope, id, thread_id, now, flags,
bind_id, arg1_name, std::move(arg1_val), arg2_name, arg2_val);
}
template <class ARG1_TYPE, class ARG2_CONVERTABLE_TYPE>
static inline base::trace_event::TraceEventHandle AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
const ARG1_TYPE& arg1_val,
const char* arg2_name,
std::unique_ptr<ARG2_CONVERTABLE_TYPE> arg2_val) {
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
base::TimeTicks now = base::TimeTicks::Now();
return AddTraceEventWithThreadIdAndTimestamp(
phase, category_group_enabled, name, scope, id, thread_id, now, flags,
bind_id, arg1_name, arg1_val, arg2_name, std::move(arg2_val));
}
template <class ARG1_CONVERTABLE_TYPE, class ARG2_CONVERTABLE_TYPE>
static inline base::trace_event::TraceEventHandle AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
std::unique_ptr<ARG1_CONVERTABLE_TYPE> arg1_val,
const char* arg2_name,
std::unique_ptr<ARG2_CONVERTABLE_TYPE> arg2_val) {
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
base::TimeTicks now = base::TimeTicks::Now();
return AddTraceEventWithThreadIdAndTimestamp(
phase, category_group_enabled, name, scope, id, thread_id, now, flags,
bind_id, arg1_name, std::move(arg1_val), arg2_name, std::move(arg2_val));
}
template<class ARG1_TYPE, class ARG2_TYPE>
static inline base::trace_event::TraceEventHandle AddTraceEvent(
char phase,
const unsigned char* category_group_enabled,
const char* name,
const char* scope,
unsigned long long id,
unsigned int flags,
unsigned long long bind_id,
const char* arg1_name,
const ARG1_TYPE& arg1_val,
const char* arg2_name,
const ARG2_TYPE& arg2_val) {
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
base::TimeTicks now = base::TimeTicks::Now();
return AddTraceEventWithThreadIdAndTimestamp(
phase, category_group_enabled, name, scope, id, thread_id, now, flags,
bind_id, arg1_name, arg1_val, arg2_name, arg2_val);
}
template <class ARG1_CONVERTABLE_TYPE>
static inline void AddMetadataEvent(
const unsigned char* category_group_enabled,
const char* event_name,
const char* arg_name,
std::unique_ptr<ARG1_CONVERTABLE_TYPE> arg_value) {
const char* arg_names[1] = {arg_name};
unsigned char arg_types[1] = {TRACE_VALUE_TYPE_CONVERTABLE};
std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
convertable_values[1] = {std::move(arg_value)};
base::trace_event::TraceLog::GetInstance()->AddMetadataEvent(
category_group_enabled, event_name,
1, // num_args
arg_names, arg_types,
nullptr, // arg_values
convertable_values, TRACE_EVENT_FLAG_NONE);
}
template <class ARG1_TYPE>
static void AddMetadataEvent(const unsigned char* category_group_enabled,
const char* event_name,
const char* arg_name,
const ARG1_TYPE& arg_val) {
const int num_args = 1;
const char* arg_names[1] = {arg_name};
unsigned char arg_types[1];
unsigned long long arg_values[1];
SetTraceValue(arg_val, &arg_types[0], &arg_values[0]);
base::trace_event::TraceLog::GetInstance()->AddMetadataEvent(
category_group_enabled, event_name, num_args, arg_names, arg_types,
arg_values, nullptr, TRACE_EVENT_FLAG_NONE);
}
// Used by TRACE_EVENTx macros. Do not use directly.
class TRACE_EVENT_API_CLASS_EXPORT ScopedTracer {
public:
// Note: members of data_ intentionally left uninitialized. See Initialize.
ScopedTracer() : p_data_(NULL) {}
~ScopedTracer() {
if (p_data_ && *data_.category_group_enabled) {
TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
data_.category_group_enabled, data_.name, data_.event_handle);
}
}
void Initialize(const unsigned char* category_group_enabled,
const char* name,
base::trace_event::TraceEventHandle 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 unsigned char* category_group_enabled;
const char* name;
base::trace_event::TraceEventHandle event_handle;
};
Data* p_data_;
Data data_;
};
// Used by TRACE_EVENT_BINARY_EFFICIENTx macro. Do not use directly.
class TRACE_EVENT_API_CLASS_EXPORT ScopedTraceBinaryEfficient {
public:
ScopedTraceBinaryEfficient(const char* category_group, const char* name);
~ScopedTraceBinaryEfficient();
private:
const unsigned char* category_group_enabled_;
const char* name_;
base::trace_event::TraceEventHandle event_handle_;
};
// This macro generates less code then TRACE_EVENT0 but is also
// slower to execute when tracing is off. It should generally only be
// used with code that is seldom executed or conditionally executed
// when debugging.
// For now the category_group must be "gpu".
#define TRACE_EVENT_BINARY_EFFICIENT0(category_group, name) \
trace_event_internal::ScopedTraceBinaryEfficient \
INTERNAL_TRACE_EVENT_UID(scoped_trace)(category_group, name);
} // namespace trace_event_internal
namespace base {
namespace trace_event {
template<typename IDType> class TraceScopedTrackableObject {
public:
TraceScopedTrackableObject(const char* category_group, const char* name,
IDType id)
: category_group_(category_group),
name_(name),
id_(id) {
TRACE_EVENT_OBJECT_CREATED_WITH_ID(category_group_, name_, id_);
}
template <typename ArgType> void snapshot(ArgType snapshot) {
TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(category_group_, name_, id_, snapshot);
}
~TraceScopedTrackableObject() {
TRACE_EVENT_OBJECT_DELETED_WITH_ID(category_group_, name_, id_);
}
private:
const char* category_group_;
const char* name_;
IDType id_;
DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject);
};
} // namespace trace_event
} // namespace base
#endif // BASE_TRACE_EVENT_TRACE_EVENT_H_
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