808 lines
37 KiB
C++
808 lines
37 KiB
C++
/*
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* Copyright (c) 2024 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef RTC_BASE_TRACE_EVENT_H_
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#define RTC_BASE_TRACE_EVENT_H_
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#if defined(RTC_DISABLE_TRACE_EVENTS)
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#define RTC_TRACE_EVENTS_ENABLED 0
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#else
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#define RTC_TRACE_EVENTS_ENABLED 1
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#endif
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// IWYU pragma: begin_exports
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#if defined(RTC_USE_PERFETTO)
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#include "rtc_base/trace_categories.h"
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#endif
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// IWYU pragma: end_exports
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#if !defined(RTC_USE_PERFETTO)
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#include <string>
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#include "rtc_base/event_tracer.h"
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#define RTC_NOOP() \
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do { \
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} while (0)
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// TODO(b/42226290): Add implementation for these events with Perfetto.
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#define TRACE_EVENT_BEGIN(category, name, ...) RTC_NOOP();
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#define TRACE_EVENT_END(category, ...) RTC_NOOP();
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#define TRACE_EVENT(category, name, ...) RTC_NOOP();
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#define TRACE_EVENT_INSTANT(category, name, ...) RTC_NOOP();
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#define TRACE_EVENT_CATEGORY_ENABLED(category) RTC_NOOP();
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#define TRACE_COUNTER(category, track, ...) RTC_NOOP();
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// Type values for identifying types in the TraceValue union.
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#define TRACE_VALUE_TYPE_BOOL (static_cast<unsigned char>(1))
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#define TRACE_VALUE_TYPE_UINT (static_cast<unsigned char>(2))
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#define TRACE_VALUE_TYPE_INT (static_cast<unsigned char>(3))
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#define TRACE_VALUE_TYPE_DOUBLE (static_cast<unsigned char>(4))
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#define TRACE_VALUE_TYPE_POINTER (static_cast<unsigned char>(5))
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#define TRACE_VALUE_TYPE_STRING (static_cast<unsigned char>(6))
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#define TRACE_VALUE_TYPE_COPY_STRING (static_cast<unsigned char>(7))
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#if defined(TRACE_EVENT0)
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#error "Another copy of trace_event.h has already been included."
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#endif
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#if RTC_TRACE_EVENTS_ENABLED
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// Extracted from Chromium's src/base/debug/trace_event.h.
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// This header is designed to give you trace_event macros without specifying
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// how the events actually get collected and stored. If you need to expose trace
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// event to some other universe, you can copy-and-paste this file,
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// implement the TRACE_EVENT_API macros, and do any other necessary fixup for
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// the target platform. The end result is that multiple libraries can funnel
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// events through to a shared trace event collector.
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// Trace events are for tracking application performance and resource usage.
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// Macros are provided to track:
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// Begin and end of function calls
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// Counters
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//
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// Events are issued against categories. Whereas RTC_LOG's
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// categories are statically defined, TRACE categories are created
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// implicitly with a string. For example:
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// TRACE_EVENT_INSTANT0("MY_SUBSYSTEM", "SomeImportantEvent")
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//
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// Events can be INSTANT, or can be pairs of BEGIN and END in the same scope:
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// TRACE_EVENT_BEGIN0("MY_SUBSYSTEM", "SomethingCostly")
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// doSomethingCostly()
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// TRACE_EVENT_END0("MY_SUBSYSTEM", "SomethingCostly")
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// Note: our tools can't always determine the correct BEGIN/END pairs unless
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// these are used in the same scope. Use ASYNC_BEGIN/ASYNC_END macros if you
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// need them to be in separate scopes.
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//
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// A common use case is to trace entire function scopes. This
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// issues a trace BEGIN and END automatically:
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// void doSomethingCostly() {
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// TRACE_EVENT0("MY_SUBSYSTEM", "doSomethingCostly");
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// ...
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// }
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//
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// Additional parameters can be associated with an event:
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// void doSomethingCostly2(int howMuch) {
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// TRACE_EVENT1("MY_SUBSYSTEM", "doSomethingCostly",
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// "howMuch", howMuch);
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// ...
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// }
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//
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// The trace system will automatically add to this information the
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// current process id, thread id, and a timestamp in microseconds.
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//
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// To trace an asynchronous procedure such as an IPC send/receive, use
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// ASYNC_BEGIN and ASYNC_END:
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// [single threaded sender code]
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// static int send_count = 0;
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// ++send_count;
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// TRACE_EVENT_ASYNC_BEGIN0("ipc", "message", send_count);
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// Send(new MyMessage(send_count));
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// [receive code]
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// void OnMyMessage(send_count) {
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// TRACE_EVENT_ASYNC_END0("ipc", "message", send_count);
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// }
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// The third parameter is a unique ID to match ASYNC_BEGIN/ASYNC_END pairs.
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// ASYNC_BEGIN and ASYNC_END can occur on any thread of any traced process.
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// Pointers can be used for the ID parameter, and they will be mangled
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// internally so that the same pointer on two different processes will not
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// match. For example:
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// class MyTracedClass {
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// public:
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// MyTracedClass() {
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// TRACE_EVENT_ASYNC_BEGIN0("category", "MyTracedClass", this);
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// }
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// ~MyTracedClass() {
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// TRACE_EVENT_ASYNC_END0("category", "MyTracedClass", this);
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// }
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// }
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//
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// Trace event also supports counters, which is a way to track a quantity
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// as it varies over time. Counters are created with the following macro:
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// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter", g_myCounterValue);
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//
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// Counters are process-specific. The macro itself can be issued from any
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// thread, however.
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//
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// Sometimes, you want to track two counters at once. You can do this with two
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// counter macros:
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// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter0", g_myCounterValue[0]);
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// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter1", g_myCounterValue[1]);
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// Or you can do it with a combined macro:
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// TRACE_COUNTER2("MY_SUBSYSTEM", "myCounter",
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// "bytesPinned", g_myCounterValue[0],
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// "bytesAllocated", g_myCounterValue[1]);
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// This indicates to the tracing UI that these counters should be displayed
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// in a single graph, as a summed area chart.
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//
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// Since counters are in a global namespace, you may want to disembiguate with a
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// unique ID, by using the TRACE_COUNTER_ID* variations.
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//
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// By default, trace collection is compiled in, but turned off at runtime.
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// Collecting trace data is the responsibility of the embedding
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// application. In Chrome's case, navigating to about:tracing will turn on
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// tracing and display data collected across all active processes.
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//
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// When are string argument values copied:
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// const char* arg_values are only referenced by default:
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// TRACE_EVENT1("category", "name",
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// "arg1", "literal string is only referenced");
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// Use TRACE_STR_COPY to force copying of a const char*:
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// TRACE_EVENT1("category", "name",
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// "arg1", TRACE_STR_COPY("string will be copied"));
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// std::string arg_values are always copied:
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// TRACE_EVENT1("category", "name",
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// "arg1", std::string("string will be copied"));
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//
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//
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// Thread Safety:
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// Thread safety is provided by methods defined in event_tracer.h. See the file
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// for details.
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// By default, const char* argument values are assumed to have long-lived scope
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// and will not be copied. Use this macro to force a const char* to be copied.
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#define TRACE_STR_COPY(str) \
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webrtc::trace_event_internal::TraceStringWithCopy(str)
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// This will mark the trace event as disabled by default. The user will need
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// to explicitly enable the event.
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#define TRACE_DISABLED_BY_DEFAULT(name) "disabled-by-default-" name
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// By default, uint64 ID argument values are not mangled with the Process ID in
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// TRACE_EVENT_ASYNC macros. Use this macro to force Process ID mangling.
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#define TRACE_ID_MANGLE(id) \
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webrtc::trace_event_internal::TraceID::ForceMangle(id)
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// Records a pair of begin and end events called "name" for the current
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// scope, with 0, 1 or 2 associated arguments. If the category is not
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// enabled, then this does nothing.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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#define TRACE_EVENT0(category, name) \
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INTERNAL_TRACE_EVENT_ADD_SCOPED(category, name)
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#define TRACE_EVENT1(category, name, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD_SCOPED(category, name, arg1_name, arg1_val)
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#define TRACE_EVENT2(category, name, arg1_name, arg1_val, arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD_SCOPED(category, name, arg1_name, arg1_val, \
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arg2_name, arg2_val)
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// Enum reflecting the scope of an INSTANT event. Must fit within
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// TRACE_EVENT_FLAG_SCOPE_MASK.
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static constexpr uint8_t TRACE_EVENT_SCOPE_GLOBAL = 0u << 2;
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static constexpr uint8_t TRACE_EVENT_SCOPE_PROCESS = 1u << 2;
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static constexpr uint8_t TRACE_EVENT_SCOPE_THREAD = 2u << 2;
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// Records a single event called "name" immediately, with 0, 1 or 2
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// associated arguments. If the category is not enabled, then this
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// does nothing.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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#define TRACE_EVENT_INSTANT0(category, name, scope) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, category, name, \
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TRACE_EVENT_FLAG_NONE)
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#define TRACE_EVENT_INSTANT1(category, name, scope, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, category, name, \
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TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
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#define TRACE_EVENT_INSTANT2(category, name, scope, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, category, name, \
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TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
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arg2_name, arg2_val)
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// Records a single BEGIN event called "name" immediately, with 0, 1 or 2
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// associated arguments. If the category is not enabled, then this
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// does nothing.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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#define TRACE_EVENT_BEGIN0(category, name) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, category, name, \
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TRACE_EVENT_FLAG_NONE)
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#define TRACE_EVENT_BEGIN1(category, name, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, category, name, \
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TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
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#define TRACE_EVENT_BEGIN2(category, name, arg1_name, arg1_val, arg2_name, \
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arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, category, name, \
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TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
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arg2_name, arg2_val)
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// Records a single END event for "name" immediately. If the category
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// is not enabled, then this does nothing.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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#define TRACE_EVENT_END0(category, name) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, category, name, \
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TRACE_EVENT_FLAG_NONE)
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#define TRACE_EVENT_END1(category, name, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, category, name, \
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TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
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#define TRACE_EVENT_END2(category, name, arg1_name, arg1_val, arg2_name, \
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arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, category, name, \
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TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
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arg2_name, arg2_val)
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// Records the value of a counter called "name" immediately. Value
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// must be representable as a 32 bit integer.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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#define TRACE_COUNTER1(category, name, value) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, category, name, \
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TRACE_EVENT_FLAG_NONE, "value", \
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static_cast<int>(value))
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// Records the values of a multi-parted counter called "name" immediately.
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// The UI will treat value1 and value2 as parts of a whole, displaying their
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// values as a stacked-bar chart.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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#define TRACE_COUNTER2(category, name, value1_name, value1_val, value2_name, \
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value2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, category, name, \
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TRACE_EVENT_FLAG_NONE, value1_name, \
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static_cast<int>(value1_val), value2_name, \
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static_cast<int>(value2_val))
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// Records the value of a counter called "name" immediately. Value
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// must be representable as a 32 bit integer.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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// - `id` is used to disambiguate counters with the same name. It must either
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// be a pointer or an integer value up to 64 bits. If it's a pointer, the bits
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// will be xored with a hash of the process ID so that the same pointer on
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// two different processes will not collide.
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#define TRACE_COUNTER_ID1(category, name, id, value) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_COUNTER, category, name, \
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id, TRACE_EVENT_FLAG_NONE, "value", \
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static_cast<int>(value))
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// Records the values of a multi-parted counter called "name" immediately.
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// The UI will treat value1 and value2 as parts of a whole, displaying their
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// values as a stacked-bar chart.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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// - `id` is used to disambiguate counters with the same name. It must either
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// be a pointer or an integer value up to 64 bits. If it's a pointer, the bits
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// will be xored with a hash of the process ID so that the same pointer on
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// two different processes will not collide.
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#define TRACE_COUNTER_ID2(category, name, id, value1_name, value1_val, \
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value2_name, value2_val) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_COUNTER, category, name, \
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id, TRACE_EVENT_FLAG_NONE, value1_name, \
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static_cast<int>(value1_val), value2_name, \
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static_cast<int>(value2_val))
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// Records a single ASYNC_BEGIN event called "name" immediately, with 0, 1 or 2
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// associated arguments. If the category is not enabled, then this
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// does nothing.
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// - category and name strings must have application lifetime (statics or
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// literals). They may not include " chars.
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// - `id` is used to match the ASYNC_BEGIN event with the ASYNC_END event. ASYNC
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// events are considered to match if their category, name and id values all
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// match. `id` must either be a pointer or an integer value up to 64 bits. If
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// it's a pointer, the bits will be xored with a hash of the process ID so
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// that the same pointer on two different processes will not collide.
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// An asynchronous operation can consist of multiple phases. The first phase is
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// defined by the ASYNC_BEGIN calls. Additional phases can be defined using the
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// ASYNC_STEP macros. When the operation completes, call ASYNC_END.
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// An ASYNC trace typically occur on a single thread (if not, they will only be
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// drawn on the thread defined in the ASYNC_BEGIN event), but all events in that
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// operation must use the same `name` and `id`. Each event can have its own
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// args.
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#define TRACE_EVENT_ASYNC_BEGIN0(category, name, id) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, category, \
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name, id, TRACE_EVENT_FLAG_NONE)
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#define TRACE_EVENT_ASYNC_BEGIN1(category, name, id, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, category, \
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name, id, TRACE_EVENT_FLAG_NONE, arg1_name, \
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arg1_val)
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#define TRACE_EVENT_ASYNC_BEGIN2(category, name, id, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, category, \
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name, id, TRACE_EVENT_FLAG_NONE, arg1_name, \
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arg1_val, arg2_name, arg2_val)
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// Records a single ASYNC_STEP event for `step` immediately. If the category
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// is not enabled, then this does nothing. The `name` and `id` must match the
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// ASYNC_BEGIN event above. The `step` param identifies this step within the
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// async event. This should be called at the beginning of the next phase of an
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// asynchronous operation.
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#define TRACE_EVENT_ASYNC_STEP_INTO0(category, name, id, step) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP, category, \
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name, id, TRACE_EVENT_FLAG_NONE, "step", \
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step)
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#define TRACE_EVENT_ASYNC_STEP_INTO1(category, name, id, step, arg1_name, \
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arg1_val) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP, category, \
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name, id, TRACE_EVENT_FLAG_NONE, "step", \
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step, arg1_name, arg1_val)
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// Records a single ASYNC_END event for "name" immediately. If the category
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// is not enabled, then this does nothing.
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#define TRACE_EVENT_ASYNC_END0(category, name, id) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, category, \
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name, id, TRACE_EVENT_FLAG_NONE)
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#define TRACE_EVENT_ASYNC_END1(category, name, id, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, category, \
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name, id, TRACE_EVENT_FLAG_NONE, arg1_name, \
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arg1_val)
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#define TRACE_EVENT_ASYNC_END2(category, name, id, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, category, \
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name, id, TRACE_EVENT_FLAG_NONE, arg1_name, \
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arg1_val, arg2_name, arg2_val)
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////////////////////////////////////////////////////////////////////////////////
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// Implementation specific tracing API definitions.
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// Get a pointer to the enabled state of the given trace category. Only
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// long-lived literal strings should be given as the category name. The returned
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// pointer can be held permanently in a local static for example. If the
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// unsigned char is non-zero, tracing is enabled. If tracing is enabled,
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// TRACE_EVENT_API_ADD_TRACE_EVENT can be called. It's OK if tracing is disabled
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// between the load of the tracing state and the call to
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// TRACE_EVENT_API_ADD_TRACE_EVENT, because this flag only provides an early out
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// for best performance when tracing is disabled.
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// const unsigned char*
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// TRACE_EVENT_API_GET_CATEGORY_ENABLED(const char* category_name)
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#define TRACE_EVENT_API_GET_CATEGORY_ENABLED \
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webrtc::EventTracer::GetCategoryEnabled
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// Add a trace event to the platform tracing system.
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// void TRACE_EVENT_API_ADD_TRACE_EVENT(
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// char phase,
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// const unsigned char* category_enabled,
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// const char* name,
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// unsigned long long id,
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// int num_args,
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// 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 webrtc::EventTracer::AddTraceEvent
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// 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(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__)
|
|
|
|
#if WEBRTC_NON_STATIC_TRACE_EVENT_HANDLERS
|
|
#define INTERNAL_TRACE_EVENT_INFO_TYPE const unsigned char*
|
|
#else
|
|
#define INTERNAL_TRACE_EVENT_INFO_TYPE static const unsigned char*
|
|
#endif // WEBRTC_NON_STATIC_TRACE_EVENT_HANDLERS
|
|
|
|
// Implementation detail: internal macro to create static category.
|
|
#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category) \
|
|
INTERNAL_TRACE_EVENT_INFO_TYPE INTERNAL_TRACE_EVENT_UID(catstatic) = \
|
|
TRACE_EVENT_API_GET_CATEGORY_ENABLED(category);
|
|
|
|
// Implementation detail: internal macro to create static category and add
|
|
// event if the category is enabled.
|
|
#define INTERNAL_TRACE_EVENT_ADD(phase, category, name, flags, ...) \
|
|
do { \
|
|
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category); \
|
|
if (*INTERNAL_TRACE_EVENT_UID(catstatic)) { \
|
|
webrtc::trace_event_internal::AddTraceEvent( \
|
|
phase, INTERNAL_TRACE_EVENT_UID(catstatic), name, \
|
|
webrtc::trace_event_internal::kNoEventId, flags, ##__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, name, ...) \
|
|
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category); \
|
|
webrtc::trace_event_internal::TraceEndOnScopeClose INTERNAL_TRACE_EVENT_UID( \
|
|
profileScope); \
|
|
if (*INTERNAL_TRACE_EVENT_UID(catstatic)) { \
|
|
webrtc::trace_event_internal::AddTraceEvent( \
|
|
TRACE_EVENT_PHASE_BEGIN, INTERNAL_TRACE_EVENT_UID(catstatic), name, \
|
|
webrtc::trace_event_internal::kNoEventId, TRACE_EVENT_FLAG_NONE, \
|
|
##__VA_ARGS__); \
|
|
INTERNAL_TRACE_EVENT_UID(profileScope) \
|
|
.Initialize(INTERNAL_TRACE_EVENT_UID(catstatic), name); \
|
|
}
|
|
|
|
// 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, name, id, flags, \
|
|
...) \
|
|
do { \
|
|
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category); \
|
|
if (*INTERNAL_TRACE_EVENT_UID(catstatic)) { \
|
|
unsigned char trace_event_flags = flags | TRACE_EVENT_FLAG_HAS_ID; \
|
|
webrtc::trace_event_internal::TraceID trace_event_trace_id( \
|
|
id, &trace_event_flags); \
|
|
webrtc::trace_event_internal::AddTraceEvent( \
|
|
phase, INTERNAL_TRACE_EVENT_UID(catstatic), name, \
|
|
trace_event_trace_id.data(), trace_event_flags, ##__VA_ARGS__); \
|
|
} \
|
|
} while (0)
|
|
|
|
// 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 ('B')
|
|
#define TRACE_EVENT_PHASE_END ('E')
|
|
#define TRACE_EVENT_PHASE_INSTANT ('I')
|
|
#define TRACE_EVENT_PHASE_ASYNC_BEGIN ('S')
|
|
#define TRACE_EVENT_PHASE_ASYNC_STEP ('T')
|
|
#define TRACE_EVENT_PHASE_ASYNC_END ('F')
|
|
#define TRACE_EVENT_PHASE_METADATA ('M')
|
|
#define TRACE_EVENT_PHASE_COUNTER ('C')
|
|
|
|
// Flags for changing the behavior of TRACE_EVENT_API_ADD_TRACE_EVENT.
|
|
#define TRACE_EVENT_FLAG_NONE (static_cast<unsigned char>(0))
|
|
#define TRACE_EVENT_FLAG_HAS_ID (static_cast<unsigned char>(1 << 1))
|
|
#define TRACE_EVENT_FLAG_MANGLE_ID (static_cast<unsigned char>(1 << 2))
|
|
|
|
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(actual_type, 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; \
|
|
*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, 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(name) "disabled-by-default-" name
|
|
|
|
#define TRACE_ID_MANGLE(id) 0
|
|
|
|
#define TRACE_EVENT0(category, name) RTC_NOOP()
|
|
#define TRACE_EVENT1(category, name, arg1_name, arg1_val) RTC_NOOP()
|
|
#define TRACE_EVENT2(category, name, arg1_name, arg1_val, arg2_name, arg2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_INSTANT0(category, name, scope) RTC_NOOP()
|
|
#define TRACE_EVENT_INSTANT1(category, name, scope, arg1_name, arg1_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_INSTANT2(category, name, scope, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_BEGIN0(category, name) RTC_NOOP()
|
|
#define TRACE_EVENT_BEGIN1(category, name, arg1_name, arg1_val) RTC_NOOP()
|
|
#define TRACE_EVENT_BEGIN2(category, name, arg1_name, arg1_val, arg2_name, \
|
|
arg2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_END0(category, name) RTC_NOOP()
|
|
#define TRACE_EVENT_END1(category, name, arg1_name, arg1_val) RTC_NOOP()
|
|
#define TRACE_EVENT_END2(category, name, arg1_name, arg1_val, arg2_name, \
|
|
arg2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_COUNTER1(category, name, value) RTC_NOOP()
|
|
|
|
#define TRACE_COUNTER2(category, name, value1_name, value1_val, value2_name, \
|
|
value2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_COUNTER_ID1(category, name, id, value) RTC_NOOP()
|
|
|
|
#define TRACE_COUNTER_ID2(category, name, id, value1_name, value1_val, \
|
|
value2_name, value2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_ASYNC_BEGIN0(category, name, id) RTC_NOOP()
|
|
#define TRACE_EVENT_ASYNC_BEGIN1(category, name, id, arg1_name, arg1_val) \
|
|
RTC_NOOP()
|
|
#define TRACE_EVENT_ASYNC_BEGIN2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_ASYNC_STEP_INTO0(category, name, id, step) RTC_NOOP()
|
|
#define TRACE_EVENT_ASYNC_STEP_INTO1(category, name, id, step, arg1_name, \
|
|
arg1_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_ASYNC_END0(category, name, id) RTC_NOOP()
|
|
#define TRACE_EVENT_ASYNC_END1(category, name, id, arg1_name, arg1_val) \
|
|
RTC_NOOP()
|
|
#define TRACE_EVENT_ASYNC_END2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
RTC_NOOP()
|
|
|
|
#define TRACE_EVENT_API_GET_CATEGORY_ENABLED ""
|
|
|
|
#define TRACE_EVENT_API_ADD_TRACE_EVENT RTC_NOOP()
|
|
|
|
#endif // RTC_TRACE_EVENTS_ENABLED
|
|
#endif // RTC_USE_PERFETTO
|
|
|
|
#endif // RTC_BASE_TRACE_EVENT_H_
|