src/inspector/V8ValueCopier.cpp - Issue 2300823002: Revert of [inspector] Initial import of v8_inspector.

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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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