887 lines
42 KiB
C++
887 lines
42 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file under third_party_mods/chromium or at:
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// http://src.chromium.org/svn/trunk/src/LICENSE
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#ifndef RTC_BASE_TRACE_EVENT_H_
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#define RTC_BASE_TRACE_EVENT_H_
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#include <string>
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#include "rtc_base/event_tracer.h"
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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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// 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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//
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// Memory scoping note:
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// Tracing copies the pointers, not the string content, of the strings passed
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// in for category, name, and arg_names. Thus, the following code will
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// cause problems:
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// char* str = strdup("impprtantName");
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// TRACE_EVENT_INSTANT0("SUBSYSTEM", str); // BAD!
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// free(str); // Trace system now has dangling pointer
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//
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// To avoid this issue with the |name| and |arg_name| parameters, use the
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// TRACE_EVENT_COPY_XXX overloads of the macros at additional runtime overhead.
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// Notes: The category must always be in a long-lived char* (i.e. static const).
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// The |arg_values|, when used, are always deep copied with the _COPY
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// macros.
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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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// 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) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
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category, name, TRACE_EVENT_FLAG_NONE)
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#define TRACE_EVENT_INSTANT1(category, name, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
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category, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
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#define TRACE_EVENT_INSTANT2(category, name, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
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category, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
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arg2_name, arg2_val)
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#define TRACE_EVENT_COPY_INSTANT0(category, name) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
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category, name, TRACE_EVENT_FLAG_COPY)
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#define TRACE_EVENT_COPY_INSTANT1(category, name, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
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category, name, TRACE_EVENT_FLAG_COPY, arg1_name, arg1_val)
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#define TRACE_EVENT_COPY_INSTANT2(category, name, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
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category, name, TRACE_EVENT_FLAG_COPY, 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, \
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category, name, 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, \
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category, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
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#define TRACE_EVENT_BEGIN2(category, name, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
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category, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
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arg2_name, arg2_val)
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#define TRACE_EVENT_COPY_BEGIN0(category, name) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
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category, name, TRACE_EVENT_FLAG_COPY)
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#define TRACE_EVENT_COPY_BEGIN1(category, name, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
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category, name, TRACE_EVENT_FLAG_COPY, arg1_name, arg1_val)
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#define TRACE_EVENT_COPY_BEGIN2(category, name, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
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category, name, TRACE_EVENT_FLAG_COPY, 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, \
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category, name, 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, \
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category, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
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#define TRACE_EVENT_END2(category, name, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
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category, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
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arg2_name, arg2_val)
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#define TRACE_EVENT_COPY_END0(category, name) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
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category, name, TRACE_EVENT_FLAG_COPY)
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#define TRACE_EVENT_COPY_END1(category, name, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
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category, name, TRACE_EVENT_FLAG_COPY, arg1_name, arg1_val)
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#define TRACE_EVENT_COPY_END2(category, name, arg1_name, arg1_val, \
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arg2_name, arg2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
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category, name, TRACE_EVENT_FLAG_COPY, 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, \
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category, name, TRACE_EVENT_FLAG_NONE, \
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"value", static_cast<int>(value))
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#define TRACE_COPY_COUNTER1(category, name, value) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, \
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category, name, TRACE_EVENT_FLAG_COPY, \
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"value", 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, \
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value2_name, value2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, \
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category, name, TRACE_EVENT_FLAG_NONE, \
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value1_name, static_cast<int>(value1_val), \
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value2_name, static_cast<int>(value2_val))
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#define TRACE_COPY_COUNTER2(category, name, value1_name, value1_val, \
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value2_name, value2_val) \
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INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, \
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category, name, TRACE_EVENT_FLAG_COPY, \
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value1_name, static_cast<int>(value1_val), \
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value2_name, 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, \
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category, name, id, TRACE_EVENT_FLAG_NONE, \
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"value", static_cast<int>(value))
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#define TRACE_COPY_COUNTER_ID1(category, name, id, value) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_COUNTER, \
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category, name, id, TRACE_EVENT_FLAG_COPY, \
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"value", 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, \
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category, name, id, TRACE_EVENT_FLAG_NONE, \
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value1_name, static_cast<int>(value1_val), \
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value2_name, static_cast<int>(value2_val))
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#define TRACE_COPY_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, \
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category, name, id, TRACE_EVENT_FLAG_COPY, \
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value1_name, static_cast<int>(value1_val), \
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value2_name, 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, \
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category, 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, \
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category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, 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, \
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category, name, id, TRACE_EVENT_FLAG_NONE, \
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arg1_name, arg1_val, arg2_name, arg2_val)
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#define TRACE_EVENT_COPY_ASYNC_BEGIN0(category, name, id) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
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category, name, id, TRACE_EVENT_FLAG_COPY)
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#define TRACE_EVENT_COPY_ASYNC_BEGIN1(category, name, id, arg1_name, arg1_val) \
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INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
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category, name, id, TRACE_EVENT_FLAG_COPY, \
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arg1_name, arg1_val)
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#define TRACE_EVENT_COPY_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, \
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category, name, id, TRACE_EVENT_FLAG_COPY, \
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arg1_name, 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
|
|
// 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_STEP0(category, name, id, step) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, "step", step)
|
|
#define TRACE_EVENT_ASYNC_STEP1(category, name, id, step, \
|
|
arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, "step", step, \
|
|
arg1_name, arg1_val)
|
|
#define TRACE_EVENT_COPY_ASYNC_STEP0(category, name, id, step) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, "step", step)
|
|
#define TRACE_EVENT_COPY_ASYNC_STEP1(category, name, id, step, \
|
|
arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, "step", step, \
|
|
arg1_name, arg1_val)
|
|
|
|
// Records a single ASYNC_END event for "name" immediately. If the category
|
|
// is not enabled, then this does nothing.
|
|
#define TRACE_EVENT_ASYNC_END0(category, name, id) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE)
|
|
#define TRACE_EVENT_ASYNC_END1(category, name, id, arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
|
|
#define TRACE_EVENT_ASYNC_END2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, \
|
|
arg1_name, arg1_val, arg2_name, arg2_val)
|
|
#define TRACE_EVENT_COPY_ASYNC_END0(category, name, id) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY)
|
|
#define TRACE_EVENT_COPY_ASYNC_END1(category, name, id, arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, \
|
|
arg1_name, arg1_val)
|
|
#define TRACE_EVENT_COPY_ASYNC_END2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, \
|
|
arg1_name, arg1_val, arg2_name, arg2_val)
|
|
|
|
|
|
// Records a single FLOW_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 FLOW_BEGIN event with the FLOW_END event. FLOW
|
|
// 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.
|
|
// FLOW events are different from ASYNC events in how they are drawn by the
|
|
// tracing UI. A FLOW defines asynchronous data flow, such as posting a task
|
|
// (FLOW_BEGIN) and later executing that task (FLOW_END). Expect FLOWs to be
|
|
// drawn as lines or arrows from FLOW_BEGIN scopes to FLOW_END scopes. Similar
|
|
// to ASYNC, a FLOW can consist of multiple phases. The first phase is defined
|
|
// by the FLOW_BEGIN calls. Additional phases can be defined using the FLOW_STEP
|
|
// macros. When the operation completes, call FLOW_END. An async operation can
|
|
// span threads and processes, but all events in that operation must use the
|
|
// same |name| and |id|. Each event can have its own args.
|
|
#define TRACE_EVENT_FLOW_BEGIN0(category, name, id) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE)
|
|
#define TRACE_EVENT_FLOW_BEGIN1(category, name, id, arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
|
|
#define TRACE_EVENT_FLOW_BEGIN2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, \
|
|
arg1_name, arg1_val, arg2_name, arg2_val)
|
|
#define TRACE_EVENT_COPY_FLOW_BEGIN0(category, name, id) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY)
|
|
#define TRACE_EVENT_COPY_FLOW_BEGIN1(category, name, id, arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, \
|
|
arg1_name, arg1_val)
|
|
#define TRACE_EVENT_COPY_FLOW_BEGIN2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, \
|
|
arg1_name, arg1_val, arg2_name, arg2_val)
|
|
|
|
// Records a single FLOW_STEP event for |step| immediately. If the category
|
|
// is not enabled, then this does nothing. The |name| and |id| must match the
|
|
// FLOW_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_FLOW_STEP0(category, name, id, step) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, "step", step)
|
|
#define TRACE_EVENT_FLOW_STEP1(category, name, id, step, \
|
|
arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, "step", step, \
|
|
arg1_name, arg1_val)
|
|
#define TRACE_EVENT_COPY_FLOW_STEP0(category, name, id, step) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, "step", step)
|
|
#define TRACE_EVENT_COPY_FLOW_STEP1(category, name, id, step, \
|
|
arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, "step", step, \
|
|
arg1_name, arg1_val)
|
|
|
|
// Records a single FLOW_END event for "name" immediately. If the category
|
|
// is not enabled, then this does nothing.
|
|
#define TRACE_EVENT_FLOW_END0(category, name, id) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE)
|
|
#define TRACE_EVENT_FLOW_END1(category, name, id, arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
|
|
#define TRACE_EVENT_FLOW_END2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_NONE, \
|
|
arg1_name, arg1_val, arg2_name, arg2_val)
|
|
#define TRACE_EVENT_COPY_FLOW_END0(category, name, id) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY)
|
|
#define TRACE_EVENT_COPY_FLOW_END1(category, name, id, arg1_name, arg1_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, \
|
|
arg1_name, arg1_val)
|
|
#define TRACE_EVENT_COPY_FLOW_END2(category, name, id, arg1_name, arg1_val, \
|
|
arg2_name, arg2_val) \
|
|
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
|
|
category, name, id, TRACE_EVENT_FLAG_COPY, \
|
|
arg1_name, arg1_val, arg2_name, arg2_val)
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// 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 \
|
|
webrtc::EventTracer::GetCategoryEnabled
|
|
|
|
// 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 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_FLOW_BEGIN ('s')
|
|
#define TRACE_EVENT_PHASE_FLOW_STEP ('t')
|
|
#define TRACE_EVENT_PHASE_FLOW_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_COPY (static_cast<unsigned char>(1 << 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))
|
|
|
|
// Type values for identifying types in the TraceValue union.
|
|
#define TRACE_VALUE_TYPE_BOOL (static_cast<unsigned char>(1))
|
|
#define TRACE_VALUE_TYPE_UINT (static_cast<unsigned char>(2))
|
|
#define TRACE_VALUE_TYPE_INT (static_cast<unsigned char>(3))
|
|
#define TRACE_VALUE_TYPE_DOUBLE (static_cast<unsigned char>(4))
|
|
#define TRACE_VALUE_TYPE_POINTER (static_cast<unsigned char>(5))
|
|
#define TRACE_VALUE_TYPE_STRING (static_cast<unsigned char>(6))
|
|
#define TRACE_VALUE_TYPE_COPY_STRING (static_cast<unsigned char>(7))
|
|
|
|
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
|
|
|
|
#endif // RTC_BASE_TRACE_EVENT_H_
|