/* * Copyright (c) 2024 The WebRTC 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 in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #ifndef RTC_BASE_TRACE_EVENT_H_ #define RTC_BASE_TRACE_EVENT_H_ #if defined(RTC_DISABLE_TRACE_EVENTS) #define RTC_TRACE_EVENTS_ENABLED … #else #define RTC_TRACE_EVENTS_ENABLED … #endif // IWYU pragma: begin_exports #if defined(RTC_USE_PERFETTO) #include "rtc_base/trace_categories.h" #endif #include "third_party/perfetto/include/perfetto/tracing/event_context.h" #include "third_party/perfetto/include/perfetto/tracing/track.h" #include "third_party/perfetto/include/perfetto/tracing/track_event_args.h" // IWYU pragma: end_exports #if !defined(RTC_USE_PERFETTO) #include <string> #include "rtc_base/event_tracer.h" #define RTC_NOOP … // TODO(b/42226290): Add implementation for these events with Perfetto. #define TRACE_EVENT_BEGIN … #define TRACE_EVENT_END … #define TRACE_EVENT … #define TRACE_EVENT_INSTANT … #define TRACE_EVENT_CATEGORY_ENABLED … #define TRACE_COUNTER … // Type values for identifying types in the TraceValue union. #define TRACE_VALUE_TYPE_BOOL … #define TRACE_VALUE_TYPE_UINT … #define TRACE_VALUE_TYPE_INT … #define TRACE_VALUE_TYPE_DOUBLE … #define TRACE_VALUE_TYPE_POINTER … #define TRACE_VALUE_TYPE_STRING … #define TRACE_VALUE_TYPE_COPY_STRING … #if defined(TRACE_EVENT0) #error "Another copy of trace_event.h has already been included." #endif #if RTC_TRACE_EVENTS_ENABLED // Extracted from Chromium's src/base/debug/trace_event.h. // This header is designed to give you trace_event macros without specifying // how the events actually get collected and stored. If you need to expose trace // event to some other universe, you can copy-and-paste this file, // implement the TRACE_EVENT_API macros, and do any other necessary fixup for // the target platform. The end result is that multiple libraries can funnel // events through to a shared trace event collector. // Trace events are for tracking application performance and resource usage. // Macros are provided to track: // Begin and end of function calls // Counters // // Events are issued against categories. Whereas RTC_LOG's // categories are statically defined, TRACE categories are created // implicitly with a string. For example: // TRACE_EVENT_INSTANT0("MY_SUBSYSTEM", "SomeImportantEvent") // // Events can be INSTANT, or can be pairs of BEGIN and END in the same scope: // TRACE_EVENT_BEGIN0("MY_SUBSYSTEM", "SomethingCostly") // doSomethingCostly() // TRACE_EVENT_END0("MY_SUBSYSTEM", "SomethingCostly") // Note: our tools can't always determine the correct BEGIN/END pairs unless // these are used in the same scope. Use ASYNC_BEGIN/ASYNC_END macros if you // need them to be in separate scopes. // // A common use case is to trace entire function scopes. This // issues a trace BEGIN and END automatically: // void doSomethingCostly() { // TRACE_EVENT0("MY_SUBSYSTEM", "doSomethingCostly"); // ... // } // // Additional parameters can be associated with an event: // void doSomethingCostly2(int howMuch) { // TRACE_EVENT1("MY_SUBSYSTEM", "doSomethingCostly", // "howMuch", howMuch); // ... // } // // The trace system will automatically add to this information the // current process id, thread id, and a timestamp in microseconds. // // To trace an asynchronous procedure such as an IPC send/receive, use // ASYNC_BEGIN and ASYNC_END: // [single threaded sender code] // static int send_count = 0; // ++send_count; // TRACE_EVENT_ASYNC_BEGIN0("ipc", "message", send_count); // Send(new MyMessage(send_count)); // [receive code] // void OnMyMessage(send_count) { // TRACE_EVENT_ASYNC_END0("ipc", "message", send_count); // } // The third parameter is a unique ID to match ASYNC_BEGIN/ASYNC_END pairs. // ASYNC_BEGIN and ASYNC_END can occur on any thread of any traced process. // Pointers can be used for the ID parameter, and they will be mangled // internally so that the same pointer on two different processes will not // match. For example: // class MyTracedClass { // public: // MyTracedClass() { // TRACE_EVENT_ASYNC_BEGIN0("category", "MyTracedClass", this); // } // ~MyTracedClass() { // TRACE_EVENT_ASYNC_END0("category", "MyTracedClass", this); // } // } // // Trace event also supports counters, which is a way to track a quantity // as it varies over time. Counters are created with the following macro: // TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter", g_myCounterValue); // // Counters are process-specific. The macro itself can be issued from any // thread, however. // // Sometimes, you want to track two counters at once. You can do this with two // counter macros: // TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter0", g_myCounterValue[0]); // TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter1", g_myCounterValue[1]); // Or you can do it with a combined macro: // TRACE_COUNTER2("MY_SUBSYSTEM", "myCounter", // "bytesPinned", g_myCounterValue[0], // "bytesAllocated", g_myCounterValue[1]); // This indicates to the tracing UI that these counters should be displayed // in a single graph, as a summed area chart. // // Since counters are in a global namespace, you may want to disembiguate with a // unique ID, by using the TRACE_COUNTER_ID* variations. // // By default, trace collection is compiled in, but turned off at runtime. // Collecting trace data is the responsibility of the embedding // application. In Chrome's case, navigating to about:tracing will turn on // tracing and display data collected across all active processes. // // When are string argument values copied: // const char* arg_values are only referenced by default: // TRACE_EVENT1("category", "name", // "arg1", "literal string is only referenced"); // Use TRACE_STR_COPY to force copying of a const char*: // TRACE_EVENT1("category", "name", // "arg1", TRACE_STR_COPY("string will be copied")); // std::string arg_values are always copied: // TRACE_EVENT1("category", "name", // "arg1", std::string("string will be copied")); // // // Thread Safety: // Thread safety is provided by methods defined in event_tracer.h. See the file // for details. // 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 … // This will mark the trace event as disabled by default. The user will need // to explicitly enable the event. #define TRACE_DISABLED_BY_DEFAULT … // By default, uint64 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 … // Records a pair of begin and end events called "name" for the current // scope, with 0, 1 or 2 associated arguments. If the category is not // enabled, then this does nothing. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. #define TRACE_EVENT0 … #define TRACE_EVENT1 … #define TRACE_EVENT2 … // Enum reflecting the scope of an INSTANT event. Must fit within // TRACE_EVENT_FLAG_SCOPE_MASK. static constexpr uint8_t TRACE_EVENT_SCOPE_GLOBAL = 0u << 2; static constexpr uint8_t TRACE_EVENT_SCOPE_PROCESS = 1u << 2; static constexpr uint8_t TRACE_EVENT_SCOPE_THREAD = 2u << 2; // Records a single event called "name" immediately, with 0, 1 or 2 // associated arguments. If the category is not enabled, then this // does nothing. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. #define TRACE_EVENT_INSTANT0 … #define TRACE_EVENT_INSTANT1 … #define TRACE_EVENT_INSTANT2 … // Records a single BEGIN event called "name" immediately, with 0, 1 or 2 // associated arguments. If the category is not enabled, then this // does nothing. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. #define TRACE_EVENT_BEGIN0 … #define TRACE_EVENT_BEGIN1 … #define TRACE_EVENT_BEGIN2 … // Records a single END event for "name" immediately. If the category // is not enabled, then this does nothing. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. #define TRACE_EVENT_END0 … #define TRACE_EVENT_END1 … #define TRACE_EVENT_END2 … // Records the value of a counter called "name" immediately. Value // must be representable as a 32 bit integer. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. #define TRACE_COUNTER1 … // Records the values of a multi-parted counter called "name" immediately. // The UI will treat value1 and value2 as parts of a whole, displaying their // values as a stacked-bar chart. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. #define TRACE_COUNTER2 … // Records the value of a counter called "name" immediately. Value // must be representable as a 32 bit integer. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. // - `id` is used to disambiguate counters with the same name. It must either // be a pointer or an integer value up to 64 bits. If it's a pointer, the bits // will be xored with a hash of the process ID so that the same pointer on // two different processes will not collide. #define TRACE_COUNTER_ID1 … // Records the values of a multi-parted counter called "name" immediately. // The UI will treat value1 and value2 as parts of a whole, displaying their // values as a stacked-bar chart. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. // - `id` is used to disambiguate counters with the same name. It must either // be a pointer or an integer value up to 64 bits. If it's a pointer, the bits // will be xored with a hash of the process ID so that the same pointer on // two different processes will not collide. #define TRACE_COUNTER_ID2 … // Records a single ASYNC_BEGIN event called "name" immediately, with 0, 1 or 2 // associated arguments. If the category is not enabled, then this // does nothing. // - category and name strings must have application lifetime (statics or // literals). They may not include " chars. // - `id` is used to match the ASYNC_BEGIN event with the ASYNC_END event. ASYNC // events are considered to match if their category, name and id values all // match. `id` must either be a pointer or an integer value up to 64 bits. If // it's a pointer, the bits will be xored with a hash of the process ID so // that the same pointer on two different processes will not collide. // An asynchronous operation can consist of multiple phases. The first phase is // defined by the ASYNC_BEGIN calls. Additional phases can be defined using the // ASYNC_STEP macros. When the operation completes, call ASYNC_END. // An ASYNC trace typically occur on a single thread (if not, they will only be // drawn on the thread defined in the ASYNC_BEGIN event), but all events in that // operation must use the same `name` and `id`. Each event can have its own // args. #define TRACE_EVENT_ASYNC_BEGIN0 … #define TRACE_EVENT_ASYNC_BEGIN1 … #define TRACE_EVENT_ASYNC_BEGIN2 … // Records a single ASYNC_STEP event for `step` immediately. If the category // is not enabled, then this does nothing. The `name` and `id` must match the // ASYNC_BEGIN event above. The `step` param identifies this step within the // async event. This should be called at the beginning of the next phase of an // asynchronous operation. #define TRACE_EVENT_ASYNC_STEP_INTO0 … #define TRACE_EVENT_ASYNC_STEP_INTO1 … // Records a single ASYNC_END event for "name" immediately. If the category // is not enabled, then this does nothing. #define TRACE_EVENT_ASYNC_END0 … #define TRACE_EVENT_ASYNC_END1 … #define TRACE_EVENT_ASYNC_END2 … //////////////////////////////////////////////////////////////////////////////// // 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 name. 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_ENABLED(const char* category_name) #define TRACE_EVENT_API_GET_CATEGORY_ENABLED … // Add a trace event to the platform tracing system. // void TRACE_EVENT_API_ADD_TRACE_EVENT( // char phase, // const unsigned char* category_enabled, // const char* name, // unsigned long long id, // int num_args, // const char** arg_names, // const unsigned char* arg_types, // const unsigned long long* arg_values, // unsigned char flags) #define TRACE_EVENT_API_ADD_TRACE_EVENT … //////////////////////////////////////////////////////////////////////////////// // 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 collissions. #define INTERNAL_TRACE_EVENT_UID3 … #define INTERNAL_TRACE_EVENT_UID2 … #define INTERNAL_TRACE_EVENT_UID … #if WEBRTC_NON_STATIC_TRACE_EVENT_HANDLERS #define INTERNAL_TRACE_EVENT_INFO_TYPE … #else #define INTERNAL_TRACE_EVENT_INFO_TYPE … #endif // WEBRTC_NON_STATIC_TRACE_EVENT_HANDLERS // Implementation detail: internal macro to create static category. #define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO … // Implementation detail: internal macro to create static category and add // event if the category is enabled. #define INTERNAL_TRACE_EVENT_ADD … // 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 … // Implementation detail: internal macro to create static category and add // event if the category is enabled. #define INTERNAL_TRACE_EVENT_ADD_WITH_ID … // Notes regarding the following definitions: // New values can be added and propagated to third party libraries, but existing // definitions must never be changed, because third party libraries may use old // definitions. // Phase indicates the nature of an event entry. E.g. part of a begin/end pair. #define TRACE_EVENT_PHASE_BEGIN … #define TRACE_EVENT_PHASE_END … #define TRACE_EVENT_PHASE_INSTANT … #define TRACE_EVENT_PHASE_ASYNC_BEGIN … #define TRACE_EVENT_PHASE_ASYNC_STEP … #define TRACE_EVENT_PHASE_ASYNC_END … #define TRACE_EVENT_PHASE_METADATA … #define TRACE_EVENT_PHASE_COUNTER … // Flags for changing the behavior of TRACE_EVENT_API_ADD_TRACE_EVENT. #define TRACE_EVENT_FLAG_NONE … #define TRACE_EVENT_FLAG_HAS_ID … #define TRACE_EVENT_FLAG_MANGLE_ID … namespace webrtc { namespace trace_event_internal { // Specify these values when the corresponding argument of AddTraceEvent is not // used. const int kZeroNumArgs = 0; const unsigned long long kNoEventId = 0; // TraceID encapsulates an ID that can either be an integer or pointer. Pointers // are mangled with the Process ID so that they are unlikely to collide when the // same pointer is used on different processes. class TraceID { public: class ForceMangle { public: explicit ForceMangle(unsigned long long id) : data_(id) {} explicit ForceMangle(unsigned long id) : data_(id) {} explicit ForceMangle(unsigned int id) : data_(id) {} explicit ForceMangle(unsigned short id) : data_(id) {} explicit ForceMangle(unsigned char id) : data_(id) {} explicit ForceMangle(long long id) : data_(static_cast<unsigned long long>(id)) {} explicit ForceMangle(long id) : data_(static_cast<unsigned long long>(id)) {} explicit ForceMangle(int id) : data_(static_cast<unsigned long long>(id)) {} explicit ForceMangle(short id) : data_(static_cast<unsigned long long>(id)) {} explicit ForceMangle(signed char id) : data_(static_cast<unsigned long long>(id)) {} unsigned long long data() const { return data_; } private: unsigned long long data_; }; explicit TraceID(const void* id, unsigned char* flags) : data_( static_cast<unsigned long long>(reinterpret_cast<uintptr_t>(id))) { *flags |= TRACE_EVENT_FLAG_MANGLE_ID; } explicit TraceID(ForceMangle id, unsigned char* flags) : data_(id.data()) { *flags |= TRACE_EVENT_FLAG_MANGLE_ID; } explicit TraceID(unsigned long long id, unsigned char* flags) : data_(id) { (void)flags; } explicit TraceID(unsigned long id, unsigned char* flags) : data_(id) { (void)flags; } explicit TraceID(unsigned int id, unsigned char* flags) : data_(id) { (void)flags; } explicit TraceID(unsigned short id, unsigned char* flags) : data_(id) { (void)flags; } explicit TraceID(unsigned char id, unsigned char* flags) : data_(id) { (void)flags; } explicit TraceID(long long id, unsigned char* flags) : data_(static_cast<unsigned long long>(id)) { (void)flags; } explicit TraceID(long id, unsigned char* flags) : data_(static_cast<unsigned long long>(id)) { (void)flags; } explicit TraceID(int id, unsigned char* flags) : data_(static_cast<unsigned long long>(id)) { (void)flags; } explicit TraceID(short id, unsigned char* flags) : data_(static_cast<unsigned long long>(id)) { (void)flags; } explicit TraceID(signed char id, unsigned char* flags) : data_(static_cast<unsigned long long>(id)) { (void)flags; } unsigned long long data() const { return data_; } private: unsigned long long data_; }; // 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) {} operator const char*() 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 … // Simpler form for int types that can be safely casted. #define INTERNAL_DECLARE_SET_TRACE_VALUE_INT … 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, as_bool, TRACE_VALUE_TYPE_BOOL) INTERNAL_DECLARE_SET_TRACE_VALUE(double, as_double, TRACE_VALUE_TYPE_DOUBLE) INTERNAL_DECLARE_SET_TRACE_VALUE(const void*, as_pointer, TRACE_VALUE_TYPE_POINTER) INTERNAL_DECLARE_SET_TRACE_VALUE(const char*, as_string, TRACE_VALUE_TYPE_STRING) INTERNAL_DECLARE_SET_TRACE_VALUE(const TraceStringWithCopy&, 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; } // These AddTraceEvent 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. static inline void AddTraceEvent(char phase, const unsigned char* category_enabled, const char* name, unsigned long long id, unsigned char flags) { TRACE_EVENT_API_ADD_TRACE_EVENT(phase, category_enabled, name, id, kZeroNumArgs, nullptr, nullptr, nullptr, flags); } template <class ARG1_TYPE> static inline void AddTraceEvent(char phase, const unsigned char* category_enabled, const char* name, unsigned long long id, unsigned char flags, 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]); TRACE_EVENT_API_ADD_TRACE_EVENT(phase, category_enabled, name, id, num_args, &arg1_name, arg_types, arg_values, flags); } template <class ARG1_TYPE, class ARG2_TYPE> static inline void AddTraceEvent(char phase, const unsigned char* category_enabled, const char* name, unsigned long long id, unsigned char flags, 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]); TRACE_EVENT_API_ADD_TRACE_EVENT(phase, category_enabled, name, id, num_args, arg_names, arg_types, arg_values, flags); } // Used by TRACE_EVENTx macro. Do not use directly. class TraceEndOnScopeClose { public: // Note: members of data_ intentionally left uninitialized. See Initialize. TraceEndOnScopeClose() : p_data_(nullptr) {} ~TraceEndOnScopeClose() { if (p_data_) AddEventIfEnabled(); } void Initialize(const unsigned char* category_enabled, const char* name) { data_.category_enabled = category_enabled; data_.name = name; p_data_ = &data_; } private: // Add the end event if the category is still enabled. void AddEventIfEnabled() { // Only called when p_data_ is non-null. if (*p_data_->category_enabled) { TRACE_EVENT_API_ADD_TRACE_EVENT(TRACE_EVENT_PHASE_END, p_data_->category_enabled, p_data_->name, kNoEventId, kZeroNumArgs, nullptr, nullptr, nullptr, TRACE_EVENT_FLAG_NONE); } } // 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_enabled; const char* name; }; Data* p_data_; Data data_; }; } // namespace trace_event_internal } // namespace webrtc #else //////////////////////////////////////////////////////////////////////////////// // This section defines no-op alternatives to the tracing macros when // RTC_DISABLE_TRACE_EVENTS is defined. #define TRACE_DISABLED_BY_DEFAULT … #define TRACE_ID_MANGLE … #define TRACE_EVENT0 … #define TRACE_EVENT1 … #define TRACE_EVENT2 … #define TRACE_EVENT_INSTANT0 … #define TRACE_EVENT_INSTANT1 … #define TRACE_EVENT_INSTANT2 … #define TRACE_EVENT_BEGIN0 … #define TRACE_EVENT_BEGIN1 … #define TRACE_EVENT_BEGIN2 … #define TRACE_EVENT_END0 … #define TRACE_EVENT_END1 … #define TRACE_EVENT_END2 … #define TRACE_COUNTER1 … #define TRACE_COUNTER2 … #define TRACE_COUNTER_ID1 … #define TRACE_COUNTER_ID2 … #define TRACE_EVENT_ASYNC_BEGIN0 … #define TRACE_EVENT_ASYNC_BEGIN1 … #define TRACE_EVENT_ASYNC_BEGIN2 … #define TRACE_EVENT_ASYNC_STEP_INTO0 … #define TRACE_EVENT_ASYNC_STEP_INTO1 … #define TRACE_EVENT_ASYNC_END0 … #define TRACE_EVENT_ASYNC_END1 … #define TRACE_EVENT_ASYNC_END2 … #define TRACE_EVENT_API_GET_CATEGORY_ENABLED … #define TRACE_EVENT_API_ADD_TRACE_EVENT … #endif // RTC_TRACE_EVENTS_ENABLED #endif // RTC_USE_PERFETTO #endif // RTC_BASE_TRACE_EVENT_H_
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