1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/tracing/traced-value.h"
#include "src/base/platform/platform.h"
#include "src/conversions.h"
namespace v8 {
namespace tracing {
namespace {
#define DCHECK_CURRENT_CONTAINER_IS(x) DCHECK_EQ(x, nesting_stack_.back())
#define DCHECK_CONTAINER_STACK_DEPTH_EQ(x) DCHECK_EQ(x, nesting_stack_.size())
#ifdef DEBUG
const bool kStackTypeDict = false;
const bool kStackTypeArray = true;
#define DEBUG_PUSH_CONTAINER(x) nesting_stack_.push_back(x)
#define DEBUG_POP_CONTAINER() nesting_stack_.pop_back()
#else
#define DEBUG_PUSH_CONTAINER(x) ((void)0)
#define DEBUG_POP_CONTAINER() ((void)0)
#endif
void EscapeAndAppendString(const char* value, std::string* result) {
*result += '"';
char number_buffer[10];
while (*value) {
char c = *value++;
switch (c) {
case '\t':
*result += "\\t";
break;
case '\n':
*result += "\\n";
break;
case '\"':
*result += "\\\"";
break;
case '\\':
*result += "\\\\";
break;
default:
if (c < '\040') {
base::OS::SNPrintF(
number_buffer, arraysize(number_buffer), "\\u%04X",
static_cast<unsigned>(static_cast<unsigned char>(c)));
*result += number_buffer;
} else {
*result += c;
}
}
}
*result += '"';
}
} // namespace
std::unique_ptr<TracedValue> TracedValue::Create() {
return std::unique_ptr<TracedValue>(new TracedValue());
}
TracedValue::TracedValue() : first_item_(true) {
DEBUG_PUSH_CONTAINER(kStackTypeDict);
}
TracedValue::~TracedValue() {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
DEBUG_POP_CONTAINER();
DCHECK_CONTAINER_STACK_DEPTH_EQ(0u);
}
void TracedValue::SetInteger(const char* name, int value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
WriteName(name);
data_ += std::to_string(value);
}
void TracedValue::SetDouble(const char* name, double value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
WriteName(name);
i::EmbeddedVector<char, 100> buffer;
data_ += DoubleToCString(value, buffer);
}
void TracedValue::SetBoolean(const char* name, bool value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
WriteName(name);
data_ += value ? "true" : "false";
}
void TracedValue::SetString(const char* name, const char* value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
WriteName(name);
EscapeAndAppendString(value, &data_);
}
void TracedValue::BeginDictionary(const char* name) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
DEBUG_PUSH_CONTAINER(kStackTypeDict);
WriteName(name);
data_ += '{';
first_item_ = true;
}
void TracedValue::BeginArray(const char* name) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
DEBUG_PUSH_CONTAINER(kStackTypeArray);
WriteName(name);
data_ += '[';
first_item_ = true;
}
void TracedValue::AppendInteger(int value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
WriteComma();
data_ += std::to_string(value);
}
void TracedValue::AppendDouble(double value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
WriteComma();
i::EmbeddedVector<char, 100> buffer;
data_ += DoubleToCString(value, buffer);
}
void TracedValue::AppendBoolean(bool value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
WriteComma();
data_ += value ? "true" : "false";
}
void TracedValue::AppendString(const char* value) {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
WriteComma();
EscapeAndAppendString(value, &data_);
}
void TracedValue::BeginDictionary() {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
DEBUG_PUSH_CONTAINER(kStackTypeDict);
WriteComma();
data_ += '{';
first_item_ = true;
}
void TracedValue::BeginArray() {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
DEBUG_PUSH_CONTAINER(kStackTypeArray);
WriteComma();
data_ += '[';
first_item_ = true;
}
void TracedValue::EndDictionary() {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeDict);
DEBUG_POP_CONTAINER();
data_ += '}';
first_item_ = false;
}
void TracedValue::EndArray() {
DCHECK_CURRENT_CONTAINER_IS(kStackTypeArray);
DEBUG_POP_CONTAINER();
data_ += ']';
first_item_ = false;
}
void TracedValue::WriteComma() {
if (first_item_) {
first_item_ = false;
} else {
data_ += ',';
}
}
void TracedValue::WriteName(const char* name) {
WriteComma();
data_ += '"';
data_ += name;
data_ += "\":";
}
void TracedValue::AppendAsTraceFormat(std::string* out) const {
*out += '{';
*out += data_;
*out += '}';
}
} // namespace tracing
} // namespace v8
|
