141 lines
4.9 KiB
C++
141 lines
4.9 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include <iterator>
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#include <utility>
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#include "base/hash/hash.h"
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#include "base/run_loop.h"
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#include "electron/buildflags/buildflags.h"
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#include "shell/common/api/electron_api_key_weak_map.h"
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#include "shell/common/gin_converters/content_converter.h"
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#include "shell/common/gin_converters/gurl_converter.h"
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#include "shell/common/gin_converters/std_converter.h"
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#include "shell/common/gin_helper/dictionary.h"
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#include "shell/common/node_includes.h"
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#include "url/origin.h"
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#include "v8/include/v8-profiler.h"
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namespace std {
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// The hash function used by DoubleIDWeakMap.
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template <typename Type1, typename Type2>
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struct hash<std::pair<Type1, Type2>> {
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std::size_t operator()(std::pair<Type1, Type2> value) const {
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return base::HashInts(base::Hash(value.first), value.second);
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}
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};
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} // namespace std
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namespace gin {
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template <typename Type1, typename Type2>
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struct Converter<std::pair<Type1, Type2>> {
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static bool FromV8(v8::Isolate* isolate,
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v8::Local<v8::Value> val,
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std::pair<Type1, Type2>* out) {
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if (!val->IsArray())
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return false;
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v8::Local<v8::Array> array = val.As<v8::Array>();
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if (array->Length() != 2)
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return false;
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auto context = isolate->GetCurrentContext();
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return Converter<Type1>::FromV8(
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isolate, array->Get(context, 0).ToLocalChecked(), &out->first) &&
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Converter<Type2>::FromV8(
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isolate, array->Get(context, 1).ToLocalChecked(), &out->second);
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}
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};
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} // namespace gin
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namespace {
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v8::Local<v8::Value> GetHiddenValue(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::String> key) {
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v8::Local<v8::Context> context = isolate->GetCurrentContext();
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v8::Local<v8::Private> privateKey = v8::Private::ForApi(isolate, key);
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v8::Local<v8::Value> value;
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v8::Maybe<bool> result = object->HasPrivate(context, privateKey);
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if (!(result.IsJust() && result.FromJust()))
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return v8::Local<v8::Value>();
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if (object->GetPrivate(context, privateKey).ToLocal(&value))
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return value;
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return v8::Local<v8::Value>();
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}
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void SetHiddenValue(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::String> key,
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v8::Local<v8::Value> value) {
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if (value.IsEmpty())
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return;
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v8::Local<v8::Context> context = isolate->GetCurrentContext();
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v8::Local<v8::Private> privateKey = v8::Private::ForApi(isolate, key);
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object->SetPrivate(context, privateKey, value);
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}
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void DeleteHiddenValue(v8::Isolate* isolate,
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v8::Local<v8::Object> object,
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v8::Local<v8::String> key) {
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v8::Local<v8::Context> context = isolate->GetCurrentContext();
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v8::Local<v8::Private> privateKey = v8::Private::ForApi(isolate, key);
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// Actually deleting the value would make force the object into
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// dictionary mode which is unnecessarily slow. Instead, we replace
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// the hidden value with "undefined".
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object->SetPrivate(context, privateKey, v8::Undefined(isolate));
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}
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int32_t GetObjectHash(v8::Local<v8::Object> object) {
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return object->GetIdentityHash();
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}
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void TakeHeapSnapshot(v8::Isolate* isolate) {
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isolate->GetHeapProfiler()->TakeHeapSnapshot();
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}
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void RequestGarbageCollectionForTesting(v8::Isolate* isolate) {
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isolate->RequestGarbageCollectionForTesting(
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v8::Isolate::GarbageCollectionType::kFullGarbageCollection);
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}
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// This causes a fatal error by creating a circular extension dependency.
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void TriggerFatalErrorForTesting(v8::Isolate* isolate) {
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static const char* aDeps[] = {"B"};
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v8::RegisterExtension(
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std::make_unique<v8::Extension>("A", "", std::size(aDeps), aDeps));
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static const char* bDeps[] = {"A"};
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v8::RegisterExtension(
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std::make_unique<v8::Extension>("B", "", std::size(aDeps), bDeps));
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v8::ExtensionConfiguration config(1, bDeps);
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v8::Context::New(isolate, &config);
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}
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void RunUntilIdle() {
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base::RunLoop().RunUntilIdle();
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}
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void Initialize(v8::Local<v8::Object> exports,
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v8::Local<v8::Value> unused,
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v8::Local<v8::Context> context,
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void* priv) {
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gin_helper::Dictionary dict(context->GetIsolate(), exports);
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dict.SetMethod("getHiddenValue", &GetHiddenValue);
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dict.SetMethod("setHiddenValue", &SetHiddenValue);
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dict.SetMethod("deleteHiddenValue", &DeleteHiddenValue);
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dict.SetMethod("getObjectHash", &GetObjectHash);
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dict.SetMethod("takeHeapSnapshot", &TakeHeapSnapshot);
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dict.SetMethod("requestGarbageCollectionForTesting",
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&RequestGarbageCollectionForTesting);
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dict.SetMethod("triggerFatalErrorForTesting", &TriggerFatalErrorForTesting);
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dict.SetMethod("runUntilIdle", &RunUntilIdle);
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}
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} // namespace
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NODE_LINKED_MODULE_CONTEXT_AWARE(electron_common_v8_util, Initialize)
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