diff options
Diffstat (limited to 'deps/v8/src/inspector/v8-value-copier.cc')
-rw-r--r-- | deps/v8/src/inspector/v8-value-copier.cc | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/deps/v8/src/inspector/v8-value-copier.cc b/deps/v8/src/inspector/v8-value-copier.cc new file mode 100644 index 0000000000..09d86b7b98 --- /dev/null +++ b/deps/v8/src/inspector/v8-value-copier.cc @@ -0,0 +1,110 @@ +// 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/inspector/v8-value-copier.h" + +namespace v8_inspector { + +namespace { + +static int kMaxDepth = 20; +static int kMaxCalls = 1000; + +class V8ValueCopier { + public: + v8::MaybeLocal<v8::Value> copy(v8::Local<v8::Value> value, int depth) { + if (++m_calls > kMaxCalls || depth > kMaxDepth) + return v8::MaybeLocal<v8::Value>(); + + if (value.IsEmpty()) return v8::MaybeLocal<v8::Value>(); + if (value->IsNull() || value->IsUndefined() || value->IsBoolean() || + value->IsString() || value->IsNumber()) + return value; + if (!value->IsObject()) return v8::MaybeLocal<v8::Value>(); + v8::Local<v8::Object> object = value.As<v8::Object>(); + if (object->CreationContext() != m_from) return value; + + if (object->IsArray()) { + v8::Local<v8::Array> array = object.As<v8::Array>(); + v8::Local<v8::Array> result = v8::Array::New(m_isolate, array->Length()); + if (!result->SetPrototype(m_to, v8::Null(m_isolate)).FromMaybe(false)) + return v8::MaybeLocal<v8::Value>(); + for (uint32_t i = 0; i < array->Length(); ++i) { + v8::Local<v8::Value> item; + if (!array->Get(m_from, i).ToLocal(&item)) + return v8::MaybeLocal<v8::Value>(); + v8::Local<v8::Value> copied; + if (!copy(item, depth + 1).ToLocal(&copied)) + return v8::MaybeLocal<v8::Value>(); + if (!createDataProperty(m_to, result, i, copied).FromMaybe(false)) + return v8::MaybeLocal<v8::Value>(); + } + return result; + } + + v8::Local<v8::Object> result = v8::Object::New(m_isolate); + if (!result->SetPrototype(m_to, v8::Null(m_isolate)).FromMaybe(false)) + return v8::MaybeLocal<v8::Value>(); + v8::Local<v8::Array> properties; + if (!object->GetOwnPropertyNames(m_from).ToLocal(&properties)) + return v8::MaybeLocal<v8::Value>(); + for (uint32_t i = 0; i < properties->Length(); ++i) { + v8::Local<v8::Value> name; + if (!properties->Get(m_from, i).ToLocal(&name) || !name->IsString()) + return v8::MaybeLocal<v8::Value>(); + v8::Local<v8::Value> property; + if (!object->Get(m_from, name).ToLocal(&property)) + return v8::MaybeLocal<v8::Value>(); + v8::Local<v8::Value> copied; + if (!copy(property, depth + 1).ToLocal(&copied)) + return v8::MaybeLocal<v8::Value>(); + if (!createDataProperty(m_to, result, v8::Local<v8::String>::Cast(name), + copied) + .FromMaybe(false)) + return v8::MaybeLocal<v8::Value>(); + } + return result; + } + + v8::Isolate* m_isolate; + v8::Local<v8::Context> m_from; + v8::Local<v8::Context> m_to; + int m_calls; +}; + +} // namespace + +v8::MaybeLocal<v8::Value> copyValueFromDebuggerContext( + v8::Isolate* isolate, v8::Local<v8::Context> debuggerContext, + v8::Local<v8::Context> toContext, v8::Local<v8::Value> value) { + V8ValueCopier copier; + copier.m_isolate = isolate; + copier.m_from = debuggerContext; + copier.m_to = toContext; + copier.m_calls = 0; + return copier.copy(value, 0); +} + +v8::Maybe<bool> createDataProperty(v8::Local<v8::Context> context, + v8::Local<v8::Object> object, + v8::Local<v8::Name> key, + v8::Local<v8::Value> value) { + v8::TryCatch tryCatch(context->GetIsolate()); + v8::Isolate::DisallowJavascriptExecutionScope throwJs( + context->GetIsolate(), + v8::Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE); + return object->CreateDataProperty(context, key, value); +} + +v8::Maybe<bool> createDataProperty(v8::Local<v8::Context> context, + v8::Local<v8::Array> array, int index, + v8::Local<v8::Value> value) { + v8::TryCatch tryCatch(context->GetIsolate()); + v8::Isolate::DisallowJavascriptExecutionScope throwJs( + context->GetIsolate(), + v8::Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE); + return array->CreateDataProperty(context, index, value); +} + +} // namespace v8_inspector |