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Side by Side Diff: src/inspector/V8ValueCopier.cpp

Issue 2300823002: Revert of [inspector] Initial import of v8_inspector. (Closed)
Patch Set: Created 4 years, 3 months ago
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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
3 // found in the LICENSE file.
4
5 #include "src/inspector/V8ValueCopier.h"
6
7 namespace v8_inspector {
8
9 namespace {
10
11 static int kMaxDepth = 20;
12 static int kMaxCalls = 1000;
13
14 class V8ValueCopier {
15 public:
16 v8::MaybeLocal<v8::Value> copy(v8::Local<v8::Value> value, int depth)
17 {
18 if (++m_calls > kMaxCalls || depth > kMaxDepth)
19 return v8::MaybeLocal<v8::Value>();
20
21 if (value.IsEmpty())
22 return v8::MaybeLocal<v8::Value>();
23 if (value->IsNull() || value->IsUndefined() || value->IsBoolean() || val ue->IsString() || value->IsNumber())
24 return value;
25 if (!value->IsObject())
26 return v8::MaybeLocal<v8::Value>();
27 v8::Local<v8::Object> object = value.As<v8::Object>();
28 if (object->CreationContext() != m_from)
29 return value;
30
31 if (object->IsArray()) {
32 v8::Local<v8::Array> array = object.As<v8::Array>();
33 v8::Local<v8::Array> result = v8::Array::New(m_isolate, array->Lengt h());
34 if (!result->SetPrototype(m_to, v8::Null(m_isolate)).FromMaybe(false ))
35 return v8::MaybeLocal<v8::Value>();
36 for (size_t i = 0; i < array->Length(); ++i) {
37 v8::Local<v8::Value> item;
38 if (!array->Get(m_from, i).ToLocal(&item))
39 return v8::MaybeLocal<v8::Value>();
40 v8::Local<v8::Value> copied;
41 if (!copy(item, depth + 1).ToLocal(&copied))
42 return v8::MaybeLocal<v8::Value>();
43 if (!createDataProperty(m_to, result, i, copied).FromMaybe(false ))
44 return v8::MaybeLocal<v8::Value>();
45 }
46 return result;
47 }
48
49
50 v8::Local<v8::Object> result = v8::Object::New(m_isolate);
51 if (!result->SetPrototype(m_to, v8::Null(m_isolate)).FromMaybe(false))
52 return v8::MaybeLocal<v8::Value>();
53 v8::Local<v8::Array> properties;
54 if (!object->GetOwnPropertyNames(m_from).ToLocal(&properties))
55 return v8::MaybeLocal<v8::Value>();
56 for (size_t i = 0; i < properties->Length(); ++i) {
57 v8::Local<v8::Value> name;
58 if (!properties->Get(m_from, i).ToLocal(&name) || !name->IsString())
59 return v8::MaybeLocal<v8::Value>();
60 v8::Local<v8::Value> property;
61 if (!object->Get(m_from, name).ToLocal(&property))
62 return v8::MaybeLocal<v8::Value>();
63 v8::Local<v8::Value> copied;
64 if (!copy(property, depth + 1).ToLocal(&copied))
65 return v8::MaybeLocal<v8::Value>();
66 if (!createDataProperty(m_to, result, v8::Local<v8::String>::Cast(na me), copied).FromMaybe(false))
67 return v8::MaybeLocal<v8::Value>();
68 }
69 return result;
70 }
71
72 v8::Isolate* m_isolate;
73 v8::Local<v8::Context> m_from;
74 v8::Local<v8::Context> m_to;
75 int m_calls;
76 };
77
78 } // namespace
79
80 v8::MaybeLocal<v8::Value> copyValueFromDebuggerContext(v8::Isolate* isolate, v8: :Local<v8::Context> debuggerContext, v8::Local<v8::Context> toContext, v8::Local <v8::Value> value)
81 {
82 V8ValueCopier copier;
83 copier.m_isolate = isolate;
84 copier.m_from = debuggerContext;
85 copier.m_to = toContext;
86 copier.m_calls = 0;
87 return copier.copy(value, 0);
88 }
89
90 v8::Maybe<bool> createDataProperty(v8::Local<v8::Context> context, v8::Local<v8: :Object> object, v8::Local<v8::Name> key, v8::Local<v8::Value> value)
91 {
92 v8::TryCatch tryCatch(context->GetIsolate());
93 v8::Isolate::DisallowJavascriptExecutionScope throwJs(context->GetIsolate(), v8::Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE);
94 return object->CreateDataProperty(context, key, value);
95 }
96
97 v8::Maybe<bool> createDataProperty(v8::Local<v8::Context> context, v8::Local<v8: :Array> array, int index, v8::Local<v8::Value> value)
98 {
99 v8::TryCatch tryCatch(context->GetIsolate());
100 v8::Isolate::DisallowJavascriptExecutionScope throwJs(context->GetIsolate(), v8::Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE);
101 return array->CreateDataProperty(context, index, value);
102 }
103
104 } // namespace v8_inspector
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