// 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_ // Replace with stub implementation. #if 1 #include "base/trace_event/common/trace_event_common.h" #include "base/trace_event/heap_profiler.h" // To avoid -Wunused-* errors, eat expression by macro. namespace libchrome_internal { template void Ignore(Args&&... args) {} } #define INTERNAL_IGNORE(...) \ (false ? libchrome_internal::Ignore(__VA_ARGS__) : (void) 0) // Body is effectively empty. #define INTERNAL_TRACE_EVENT_ADD_SCOPED(...) INTERNAL_IGNORE(__VA_ARGS__) #define INTERNAL_TRACE_TASK_EXECUTION(...) #define INTERNAL_TRACE_EVENT_ADD_SCOPED_WITH_FLOW(...) \ INTERNAL_IGNORE(__VA_ARGS__) #define TRACE_ID_MANGLE(val) (val) namespace base { namespace trace_event { class TraceLog { public: static TraceLog* GetInstance() { static TraceLog instance; return &instance; } pid_t process_id() { return 0; } void SetCurrentThreadBlocksMessageLoop() {} }; } // namespace trace_event } // namespace base #else // 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 #include #include #include "base/atomicops.h" #include "base/debug/debugging_buildflags.h" #include "base/macros.h" #include "base/time/time.h" #include "base/time/time_override.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(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* // 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* // 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* // 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* // 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 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(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( \ 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 return unoverridden // base::TimeTicks::Now(). This is important because in headless VirtualTime can // override base:TimeTicks::Now(). #define INTERNAL_TRACE_TIME_TICKS_NOW() \ base::subtle::TimeTicksNowIgnoringOverride() // Implementation detail: internal macro to return unoverridden // base::Time::Now(). This is important because in headless VirtualTime can // override base:TimeTicks::Now(). #define INTERNAL_TRACE_TIME_NOW() base::subtle::TimeNowIgnoringOverride() // 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. // TODO(ssid): The program counter of the current task should be added here. #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()); \ TRACE_HEAP_PROFILER_API_SCOPED_WITH_PROGRAM_COUNTER \ INTERNAL_TRACE_EVENT_UID(task_pc_event)((task).posted_from.program_counter()); #else // TODO(http://crbug.com760702) remove file name and just pass the program // counter to the heap profiler macro. // TODO(ssid): The program counter of the current task should be added here. #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()); \ TRACE_HEAP_PROFILER_API_SCOPED_WITH_PROGRAM_COUNTER \ INTERNAL_TRACE_EVENT_UID(task_pc_event)((task).posted_from.program_counter()); #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( reinterpret_cast(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( reinterpret_cast(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(raw_id)) {} explicit DontMangle(long raw_id) : raw_id_(static_cast(raw_id)) {} explicit DontMangle(int raw_id) : raw_id_(static_cast(raw_id)) {} explicit DontMangle(short raw_id) : raw_id_(static_cast(raw_id)) {} explicit DontMangle(signed char raw_id) : raw_id_(static_cast(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(raw_id)) {} explicit ForceMangle(long raw_id) : raw_id_(static_cast(raw_id)) {} explicit ForceMangle(int raw_id) : raw_id_(static_cast(raw_id)) {} explicit ForceMangle(short raw_id) : raw_id_(static_cast(raw_id)) {} explicit ForceMangle(signed char raw_id) : raw_id_(static_cast(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( reinterpret_cast(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(raw_id)) {} TraceID(long raw_id) : raw_id_(static_cast(raw_id)) {} TraceID(int raw_id) : raw_id_(static_cast(raw_id)) {} TraceID(short raw_id) : raw_id_(static_cast(raw_id)) {} TraceID(signed char raw_id) : raw_id_(static_cast(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 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(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 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_val) { const int num_args = 1; unsigned char arg_types[1] = { TRACE_VALUE_TYPE_CONVERTABLE }; std::unique_ptr 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 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_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 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 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_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 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 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_val, const char* arg2_name, std::unique_ptr 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 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(base::PlatformThread::CurrentId()); const base::TimeTicks now = TRACE_TIME_TICKS_NOW(); return AddTraceEventWithThreadIdAndTimestamp( phase, category_group_enabled, name, scope, id, thread_id, now, flags, bind_id); } template 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 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(base::PlatformThread::CurrentId()); base::TimeTicks now = TRACE_TIME_TICKS_NOW(); return AddTraceEventWithThreadIdAndTimestamp( phase, category_group_enabled, name, scope, id, thread_id, now, flags, bind_id, arg1_name, arg1_val); } template 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_val) { int thread_id = static_cast(base::PlatformThread::CurrentId()); base::TimeTicks now = TRACE_TIME_TICKS_NOW(); return AddTraceEventWithThreadIdAndTimestamp( phase, category_group_enabled, name, scope, id, thread_id, now, flags, bind_id, arg1_name, std::move(arg1_val)); } template 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 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_val, const char* arg2_name, const ARG2_TYPE& arg2_val) { int thread_id = static_cast(base::PlatformThread::CurrentId()); base::TimeTicks now = TRACE_TIME_TICKS_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 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_val) { int thread_id = static_cast(base::PlatformThread::CurrentId()); base::TimeTicks now = TRACE_TIME_TICKS_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 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_val, const char* arg2_name, std::unique_ptr arg2_val) { int thread_id = static_cast(base::PlatformThread::CurrentId()); base::TimeTicks now = TRACE_TIME_TICKS_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 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(base::PlatformThread::CurrentId()); base::TimeTicks now = TRACE_TIME_TICKS_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 static inline void AddMetadataEvent( const unsigned char* category_group_enabled, const char* event_name, const char* arg_name, std::unique_ptr arg_value) { const char* arg_names[1] = {arg_name}; unsigned char arg_types[1] = {TRACE_VALUE_TYPE_CONVERTABLE}; std::unique_ptr 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 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 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 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 #endif // BASE_TRACE_EVENT_TRACE_EVENT_H_