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
194
195
196
197
198
199
200
201
|
// Copyright 2017 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/debug/debug-scope-iterator.h"
#include "src/api-inl.h"
#include "src/debug/debug.h"
#include "src/debug/liveedit.h"
#include "src/frames-inl.h"
#include "src/isolate.h"
#include "src/objects/js-generator-inl.h"
#include "src/wasm/wasm-objects-inl.h"
namespace v8 {
std::unique_ptr<debug::ScopeIterator> debug::ScopeIterator::CreateForFunction(
v8::Isolate* v8_isolate, v8::Local<v8::Function> v8_func) {
internal::Handle<internal::JSReceiver> receiver =
internal::Handle<internal::JSReceiver>::cast(Utils::OpenHandle(*v8_func));
// Besides JSFunction and JSBoundFunction, {v8_func} could be an
// ObjectTemplate with a CallAsFunctionHandler. We only handle plain
// JSFunctions.
if (!receiver->IsJSFunction()) return nullptr;
internal::Handle<internal::JSFunction> function =
internal::Handle<internal::JSFunction>::cast(receiver);
// Blink has function objects with callable map, JS_SPECIAL_API_OBJECT_TYPE
// but without context on heap.
if (!function->has_context()) return nullptr;
return std::unique_ptr<debug::ScopeIterator>(new internal::DebugScopeIterator(
reinterpret_cast<internal::Isolate*>(v8_isolate), function));
}
std::unique_ptr<debug::ScopeIterator>
debug::ScopeIterator::CreateForGeneratorObject(
v8::Isolate* v8_isolate, v8::Local<v8::Object> v8_generator) {
internal::Handle<internal::Object> generator =
Utils::OpenHandle(*v8_generator);
DCHECK(generator->IsJSGeneratorObject());
return std::unique_ptr<debug::ScopeIterator>(new internal::DebugScopeIterator(
reinterpret_cast<internal::Isolate*>(v8_isolate),
internal::Handle<internal::JSGeneratorObject>::cast(generator)));
}
namespace internal {
DebugScopeIterator::DebugScopeIterator(Isolate* isolate,
FrameInspector* frame_inspector)
: iterator_(isolate, frame_inspector) {
if (!Done() && ShouldIgnore()) Advance();
}
DebugScopeIterator::DebugScopeIterator(Isolate* isolate,
Handle<JSFunction> function)
: iterator_(isolate, function) {
if (!Done() && ShouldIgnore()) Advance();
}
DebugScopeIterator::DebugScopeIterator(Isolate* isolate,
Handle<JSGeneratorObject> generator)
: iterator_(isolate, generator) {
if (!Done() && ShouldIgnore()) Advance();
}
bool DebugScopeIterator::Done() { return iterator_.Done(); }
void DebugScopeIterator::Advance() {
DCHECK(!Done());
iterator_.Next();
while (!Done() && ShouldIgnore()) {
iterator_.Next();
}
}
bool DebugScopeIterator::ShouldIgnore() {
if (GetType() == debug::ScopeIterator::ScopeTypeLocal) return false;
return !iterator_.DeclaresLocals(i::ScopeIterator::Mode::ALL);
}
v8::debug::ScopeIterator::ScopeType DebugScopeIterator::GetType() {
DCHECK(!Done());
return static_cast<v8::debug::ScopeIterator::ScopeType>(iterator_.Type());
}
v8::Local<v8::Object> DebugScopeIterator::GetObject() {
DCHECK(!Done());
Handle<JSObject> value = iterator_.ScopeObject(i::ScopeIterator::Mode::ALL);
return Utils::ToLocal(value);
}
int DebugScopeIterator::GetScriptId() {
DCHECK(!Done());
return iterator_.GetScript()->id();
}
v8::Local<v8::Value> DebugScopeIterator::GetFunctionDebugName() {
DCHECK(!Done());
Handle<Object> name = iterator_.GetFunctionDebugName();
return Utils::ToLocal(name);
}
bool DebugScopeIterator::HasLocationInfo() {
return iterator_.HasPositionInfo();
}
debug::Location DebugScopeIterator::GetStartLocation() {
DCHECK(!Done());
return ToApiHandle<v8::debug::Script>(iterator_.GetScript())
->GetSourceLocation(iterator_.start_position());
}
debug::Location DebugScopeIterator::GetEndLocation() {
DCHECK(!Done());
return ToApiHandle<v8::debug::Script>(iterator_.GetScript())
->GetSourceLocation(iterator_.end_position());
}
bool DebugScopeIterator::SetVariableValue(v8::Local<v8::String> name,
v8::Local<v8::Value> value) {
DCHECK(!Done());
return iterator_.SetVariableValue(Utils::OpenHandle(*name),
Utils::OpenHandle(*value));
}
DebugWasmScopeIterator::DebugWasmScopeIterator(Isolate* isolate,
StandardFrame* frame,
int inlined_frame_index)
: isolate_(isolate),
frame_(frame),
inlined_frame_index_(inlined_frame_index),
type_(debug::ScopeIterator::ScopeTypeGlobal) {}
bool DebugWasmScopeIterator::Done() {
return type_ != debug::ScopeIterator::ScopeTypeGlobal &&
type_ != debug::ScopeIterator::ScopeTypeLocal;
}
void DebugWasmScopeIterator::Advance() {
DCHECK(!Done());
if (type_ == debug::ScopeIterator::ScopeTypeGlobal) {
type_ = debug::ScopeIterator::ScopeTypeLocal;
} else {
// We use ScopeTypeWith type as marker for done.
type_ = debug::ScopeIterator::ScopeTypeWith;
}
}
v8::debug::ScopeIterator::ScopeType DebugWasmScopeIterator::GetType() {
DCHECK(!Done());
return type_;
}
v8::Local<v8::Object> DebugWasmScopeIterator::GetObject() {
DCHECK(!Done());
Handle<WasmDebugInfo> debug_info(
WasmInterpreterEntryFrame::cast(frame_)->debug_info(), isolate_);
switch (type_) {
case debug::ScopeIterator::ScopeTypeGlobal:
return Utils::ToLocal(WasmDebugInfo::GetGlobalScopeObject(
debug_info, frame_->fp(), inlined_frame_index_));
case debug::ScopeIterator::ScopeTypeLocal:
return Utils::ToLocal(WasmDebugInfo::GetLocalScopeObject(
debug_info, frame_->fp(), inlined_frame_index_));
default:
return v8::Local<v8::Object>();
}
return v8::Local<v8::Object>();
}
int DebugWasmScopeIterator::GetScriptId() {
DCHECK(!Done());
return -1;
}
v8::Local<v8::Value> DebugWasmScopeIterator::GetFunctionDebugName() {
DCHECK(!Done());
return Utils::ToLocal(isolate_->factory()->empty_string());
}
bool DebugWasmScopeIterator::HasLocationInfo() { return false; }
debug::Location DebugWasmScopeIterator::GetStartLocation() {
DCHECK(!Done());
return debug::Location();
}
debug::Location DebugWasmScopeIterator::GetEndLocation() {
DCHECK(!Done());
return debug::Location();
}
bool DebugWasmScopeIterator::SetVariableValue(v8::Local<v8::String> name,
v8::Local<v8::Value> value) {
DCHECK(!Done());
return false;
}
} // namespace internal
} // namespace v8
|