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// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "platform/globals.h"
#if defined(HOST_OS_FUCHSIA) && !defined(PRODUCT)
#include <trace-engine/context.h>
#include <trace-engine/instrumentation.h>
#include <zircon/syscalls.h>
#include "platform/utils.h"
#include "vm/object.h"
#include "vm/timeline.h"
namespace dart {
void TimelineEventFuchsiaRecorder::OnEvent(TimelineEvent* event) {
if (event == NULL) {
return;
}
trace_string_ref_t category;
trace_context_t* context =
trace_acquire_context_for_category("dart", &category);
if (context == NULL) {
return;
}
trace_string_ref_t name;
if (event->owns_label()) {
// If the event owns the name, then the name will be deallocated, so
// instruct the system trace to make a copy.
name = trace_context_make_registered_string_copy(
context, event->label(), strlen(event->label()));
} else {
// If the event doesn't own the name, then it is a string literal, and
// the system trace can use the pointer and not a copy.
name = trace_context_make_registered_string_literal(
context, event->label());
}
trace_thread_ref_t thread;
trace_context_register_current_thread(context, &thread);
trace_arg_t args[TRACE_MAX_ARGS];
const intptr_t num_args = Utils::Minimum(
event->arguments_length(), static_cast<intptr_t>(TRACE_MAX_ARGS));
for (intptr_t i = 0; i < num_args; i++) {
const char* name = event->arguments()[i].name;
const char* value = event->arguments()[i].value;
trace_string_ref_t arg_name =
trace_context_make_registered_string_literal(context, name);
trace_string_ref_t arg_value =
trace_make_inline_string_ref(value, strlen(value));
args[i] = trace_make_arg(arg_name, trace_make_string_arg_value(arg_value));
}
const uint64_t time_scale = zx_ticks_per_second() / kMicrosecondsPerSecond;
const uint64_t start_time = event->LowTime() * time_scale;
const uint64_t end_time = event->HighTime() * time_scale;
// TODO(zra): The functions below emit Dart's timeline events all as category
// "dart". Instead, we could have finer-grained categories that make use of
// the name of the timeline stream, e.g. "VM", "GC", etc.
switch (event->event_type()) {
case TimelineEvent::kBegin:
trace_context_write_duration_begin_event_record(
context, start_time, &thread, &category, &name, args, num_args);
break;
case TimelineEvent::kEnd:
trace_context_write_duration_end_event_record(
context, start_time, &thread, &category, &name, args, num_args);
break;
case TimelineEvent::kInstant:
trace_context_write_instant_event_record(
context, start_time, &thread, &category, &name, TRACE_SCOPE_THREAD,
args, num_args);
break;
case TimelineEvent::kAsyncBegin:
trace_context_write_async_begin_event_record(
context, start_time, &thread, &category, &name, event->AsyncId(),
args, num_args);
break;
case TimelineEvent::kAsyncEnd:
trace_context_write_async_end_event_record(
context, end_time, &thread, &category, &name, event->AsyncId(), args,
num_args);
break;
case TimelineEvent::kAsyncInstant:
trace_context_write_async_instant_event_record(
context, start_time, &thread, &category, &name, event->AsyncId(),
args, num_args);
break;
case TimelineEvent::kDuration:
trace_context_write_duration_event_record(context, start_time, end_time,
&thread, &category, &name, args,
num_args);
break;
case TimelineEvent::kFlowBegin:
trace_context_write_flow_begin_event_record(
context, start_time, &thread, &category, &name, event->AsyncId(),
args, num_args);
break;
case TimelineEvent::kFlowStep:
trace_context_write_flow_step_event_record(
context, start_time, &thread, &category, &name, event->AsyncId(),
args, num_args);
break;
case TimelineEvent::kFlowEnd:
trace_context_write_flow_end_event_record(
context, start_time, &thread, &category, &name, event->AsyncId(),
args, num_args);
break;
default:
// TODO(zra): Figure out what to do with kCounter and kMetadata.
break;
}
trace_release_context(context);
}
} // namespace dart
#endif // defined(HOST_OS_FUCHSIA) && !defined(PRODUCT)