1// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
2// for details. All rights reserved. Use of this source code is governed by a
3// BSD-style license that can be found in the LICENSE file.
4
5#include "vm/globals.h"
6#if defined(HOST_OS_FUCHSIA) && defined(SUPPORT_TIMELINE)
7#include <lib/trace-engine/context.h>
8#include <lib/trace-engine/instrumentation.h>
9#include <zircon/syscalls.h>
10
11#include "platform/utils.h"
12#include "vm/object.h"
13#include "vm/timeline.h"
14
15namespace dart {
16
17void TimelineEventFuchsiaRecorder::OnEvent(TimelineEvent* event) {
18 if (event == NULL) {
19 return;
20 }
21 TimelineStream* stream = event->stream_;
22 trace_string_ref_t category;
23 trace_context_t* context = trace_acquire_context_for_category_cached(
24 stream->fuchsia_name(), stream->trace_site(), &category);
25 if (context == NULL) {
26 return;
27 }
28
29 trace_string_ref_t name;
30 if (event->owns_label()) {
31 // If the event owns the name, then the name will be deallocated, so
32 // instruct the system trace to make a copy.
33 name = trace_context_make_registered_string_copy(
34 context, event->label(), strlen(event->label()));
35 } else {
36 // If the event doesn't own the name, then it is a string literal, and
37 // the system trace can use the pointer and not a copy.
38 name = trace_context_make_registered_string_literal(
39 context, event->label());
40 }
41
42 trace_thread_ref_t thread;
43 trace_context_register_current_thread(context, &thread);
44
45 trace_arg_t args[TRACE_MAX_ARGS];
46 const intptr_t num_args = Utils::Minimum(
47 event->arguments_length(), static_cast<intptr_t>(TRACE_MAX_ARGS));
48
49 for (intptr_t i = 0; i < num_args; i++) {
50 const char* name = event->arguments()[i].name;
51 const char* value = event->arguments()[i].value;
52 trace_string_ref_t arg_name =
53 trace_context_make_registered_string_literal(context, name);
54 trace_string_ref_t arg_value =
55 trace_make_inline_string_ref(value, strlen(value));
56 args[i] = trace_make_arg(arg_name, trace_make_string_arg_value(arg_value));
57 }
58
59 const uint64_t time_scale = zx_ticks_per_second() / kMicrosecondsPerSecond;
60 const uint64_t start_time = event->LowTime() * time_scale;
61 const uint64_t end_time = event->HighTime() * time_scale;
62
63 // TODO(zra): The functions below emit Dart's timeline events all as category
64 // "dart". Instead, we could have finer-grained categories that make use of
65 // the name of the timeline stream, e.g. "VM", "GC", etc.
66 switch (event->event_type()) {
67 case TimelineEvent::kBegin:
68 trace_context_write_duration_begin_event_record(
69 context, start_time, &thread, &category, &name, args, num_args);
70 break;
71 case TimelineEvent::kEnd:
72 trace_context_write_duration_end_event_record(
73 context, start_time, &thread, &category, &name, args, num_args);
74 break;
75 case TimelineEvent::kInstant:
76 trace_context_write_instant_event_record(
77 context, start_time, &thread, &category, &name, TRACE_SCOPE_THREAD,
78 args, num_args);
79 break;
80 case TimelineEvent::kAsyncBegin:
81 trace_context_write_async_begin_event_record(
82 context, start_time, &thread, &category, &name, event->AsyncId(),
83 args, num_args);
84 break;
85 case TimelineEvent::kAsyncEnd:
86 trace_context_write_async_end_event_record(
87 context, end_time, &thread, &category, &name, event->AsyncId(), args,
88 num_args);
89 break;
90 case TimelineEvent::kAsyncInstant:
91 trace_context_write_async_instant_event_record(
92 context, start_time, &thread, &category, &name, event->AsyncId(),
93 args, num_args);
94 break;
95 case TimelineEvent::kDuration:
96 trace_context_write_duration_event_record(context, start_time, end_time,
97 &thread, &category, &name, args,
98 num_args);
99 break;
100 case TimelineEvent::kFlowBegin:
101 trace_context_write_flow_begin_event_record(
102 context, start_time, &thread, &category, &name, event->AsyncId(),
103 args, num_args);
104 break;
105 case TimelineEvent::kFlowStep:
106 trace_context_write_flow_step_event_record(
107 context, start_time, &thread, &category, &name, event->AsyncId(),
108 args, num_args);
109 break;
110 case TimelineEvent::kFlowEnd:
111 trace_context_write_flow_end_event_record(
112 context, start_time, &thread, &category, &name, event->AsyncId(),
113 args, num_args);
114 break;
115 default:
116 // TODO(zra): Figure out what to do with kCounter and kMetadata.
117 break;
118 }
119 trace_release_context(context);
120}
121
122} // namespace dart
123
124#endif // defined(HOST_OS_FUCHSIA) && defined(SUPPORT_TIMELINE)
125