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1 // Copyright 2016 the V8 project authors. All rights reserved. | 1 // Copyright 2016 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/libplatform/tracing/trace-writer.h" | 5 #include "src/libplatform/tracing/trace-writer.h" |
6 | 6 |
7 #include <cmath> | 7 #include <cmath> |
8 | 8 |
9 #include "base/trace_event/common/trace_event_common.h" | 9 #include "base/trace_event/common/trace_event_common.h" |
10 #include "include/v8-platform.h" | |
11 #include "src/base/platform/platform.h" | 10 #include "src/base/platform/platform.h" |
12 | 11 |
13 namespace v8 { | 12 namespace v8 { |
14 namespace platform { | 13 namespace platform { |
15 namespace tracing { | 14 namespace tracing { |
16 | 15 |
17 // Writes the given string to a stream, taking care to escape characters | 16 // Writes the given string to a stream, taking care to escape characters |
18 // when necessary. | 17 // when necessary. |
19 V8_INLINE static void WriteJSONStringToStream(const char* str, | 18 V8_INLINE static void WriteJSONStringToStream(const char* str, |
20 std::ostream& stream) { | 19 std::ostream& stream) { |
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106 } else { | 105 } else { |
107 WriteJSONStringToStream(value.as_string, stream_); | 106 WriteJSONStringToStream(value.as_string, stream_); |
108 } | 107 } |
109 break; | 108 break; |
110 default: | 109 default: |
111 UNREACHABLE(); | 110 UNREACHABLE(); |
112 break; | 111 break; |
113 } | 112 } |
114 } | 113 } |
115 | 114 |
116 void JSONTraceWriter::AppendArgValue(ConvertableToTraceFormat* value) { | |
117 std::string arg_stringified; | |
118 value->AppendAsTraceFormat(&arg_stringified); | |
119 stream_ << arg_stringified; | |
120 } | |
121 | |
122 JSONTraceWriter::JSONTraceWriter(std::ostream& stream) : stream_(stream) { | 115 JSONTraceWriter::JSONTraceWriter(std::ostream& stream) : stream_(stream) { |
123 stream_ << "{\"traceEvents\":["; | 116 stream_ << "{\"traceEvents\":["; |
124 } | 117 } |
125 | 118 |
126 JSONTraceWriter::~JSONTraceWriter() { stream_ << "]}"; } | 119 JSONTraceWriter::~JSONTraceWriter() { stream_ << "]}"; } |
127 | 120 |
128 void JSONTraceWriter::AppendTraceEvent(TraceObject* trace_event) { | 121 void JSONTraceWriter::AppendTraceEvent(TraceObject* trace_event) { |
129 if (append_comma_) stream_ << ","; | 122 if (append_comma_) stream_ << ","; |
130 append_comma_ = true; | 123 append_comma_ = true; |
131 stream_ << "{\"pid\":" << trace_event->pid() | 124 stream_ << "{\"pid\":" << trace_event->pid() |
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143 stream_ << ",\"scope\":\"" << trace_event->scope() << "\""; | 136 stream_ << ",\"scope\":\"" << trace_event->scope() << "\""; |
144 } | 137 } |
145 // So as not to lose bits from a 64-bit integer, output as a hex string. | 138 // So as not to lose bits from a 64-bit integer, output as a hex string. |
146 stream_ << ",\"id\":\"0x" << std::hex << trace_event->id() << "\"" | 139 stream_ << ",\"id\":\"0x" << std::hex << trace_event->id() << "\"" |
147 << std::dec; | 140 << std::dec; |
148 } | 141 } |
149 stream_ << ",\"args\":{"; | 142 stream_ << ",\"args\":{"; |
150 const char** arg_names = trace_event->arg_names(); | 143 const char** arg_names = trace_event->arg_names(); |
151 const uint8_t* arg_types = trace_event->arg_types(); | 144 const uint8_t* arg_types = trace_event->arg_types(); |
152 TraceObject::ArgValue* arg_values = trace_event->arg_values(); | 145 TraceObject::ArgValue* arg_values = trace_event->arg_values(); |
153 std::unique_ptr<v8::ConvertableToTraceFormat>* arg_convertables = | |
154 trace_event->arg_convertables(); | |
155 for (int i = 0; i < trace_event->num_args(); ++i) { | 146 for (int i = 0; i < trace_event->num_args(); ++i) { |
156 if (i > 0) stream_ << ","; | 147 if (i > 0) stream_ << ","; |
157 stream_ << "\"" << arg_names[i] << "\":"; | 148 stream_ << "\"" << arg_names[i] << "\":"; |
158 if (arg_types[i] == TRACE_VALUE_TYPE_CONVERTABLE) { | 149 AppendArgValue(arg_types[i], arg_values[i]); |
159 AppendArgValue(arg_convertables[i].get()); | |
160 } else { | |
161 AppendArgValue(arg_types[i], arg_values[i]); | |
162 } | |
163 } | 150 } |
164 stream_ << "}}"; | 151 stream_ << "}}"; |
165 // TODO(fmeawad): Add support for Flow Events. | 152 // TODO(fmeawad): Add support for Flow Events. |
166 } | 153 } |
167 | 154 |
168 void JSONTraceWriter::Flush() {} | 155 void JSONTraceWriter::Flush() {} |
169 | 156 |
170 TraceWriter* TraceWriter::CreateJSONTraceWriter(std::ostream& stream) { | 157 TraceWriter* TraceWriter::CreateJSONTraceWriter(std::ostream& stream) { |
171 return new JSONTraceWriter(stream); | 158 return new JSONTraceWriter(stream); |
172 } | 159 } |
173 | 160 |
174 } // namespace tracing | 161 } // namespace tracing |
175 } // namespace platform | 162 } // namespace platform |
176 } // namespace v8 | 163 } // namespace v8 |
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