+ vscode night owl theme

dots/vscodium/sdras.night-owl-2.0.1-universal/demo/cplusplus-header.h

@@ -0,0 +1,616 @@
+// Copyright 2012 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.
+
+#ifndef V8_API_H_
+#define V8_API_H_
+
+#include "include/v8-testing.h"
+#include "src/contexts.h"
+#include "src/debug/debug-interface.h"
+#include "src/detachable-vector.h"
+#include "src/heap/factory.h"
+#include "src/isolate.h"
+#include "src/objects.h"
+#include "src/objects/bigint.h"
+#include "src/objects/js-collection.h"
+#include "src/objects/js-generator.h"
+#include "src/objects/js-promise.h"
+#include "src/objects/js-proxy.h"
+#include "src/objects/module.h"
+#include "src/objects/shared-function-info.h"
+
+#include "src/objects/templates.h"
+
+namespace v8 {
+
+// Constants used in the implementation of the API.  The most natural thing
+// would usually be to place these with the classes that use them, but
+// we want to keep them out of v8.h because it is an externally
+// visible file.
+class Consts {
+ public:
+  enum TemplateType {
+    FUNCTION_TEMPLATE = 0,
+    OBJECT_TEMPLATE = 1
+  };
+};
+
+template <typename T>
+inline T ToCData(v8::internal::Object* obj);
+
+template <>
+inline v8::internal::Address ToCData(v8::internal::Object* obj);
+
+template <typename T>
+inline v8::internal::Handle<v8::internal::Object> FromCData(
+    v8::internal::Isolate* isolate, T obj);
+
+template <>
+inline v8::internal::Handle<v8::internal::Object> FromCData(
+    v8::internal::Isolate* isolate, v8::internal::Address obj);
+
+class ApiFunction {
+ public:
+  explicit ApiFunction(v8::internal::Address addr) : addr_(addr) { }
+  v8::internal::Address address() { return addr_; }
+ private:
+  v8::internal::Address addr_;
+};
+
+
+
+class RegisteredExtension {
+ public:
+  explicit RegisteredExtension(Extension* extension);
+  static void Register(RegisteredExtension* that);
+  static void UnregisterAll();
+  Extension* extension() { return extension_; }
+  RegisteredExtension* next() { return next_; }
+  static RegisteredExtension* first_extension() { return first_extension_; }
+ private:
+  Extension* extension_;
+  RegisteredExtension* next_;
+  static RegisteredExtension* first_extension_;
+};
+
+#define OPEN_HANDLE_LIST(V)                    \
+  V(Template, TemplateInfo)                    \
+  V(FunctionTemplate, FunctionTemplateInfo)    \
+  V(ObjectTemplate, ObjectTemplateInfo)        \
+  V(Signature, FunctionTemplateInfo)           \
+  V(AccessorSignature, FunctionTemplateInfo)   \
+  V(Data, Object)                              \
+  V(RegExp, JSRegExp)                          \
+  V(Object, JSReceiver)                        \
+  V(Array, JSArray)                            \
+  V(Map, JSMap)                                \
+  V(Set, JSSet)                                \
+  V(ArrayBuffer, JSArrayBuffer)                \
+  V(ArrayBufferView, JSArrayBufferView)        \
+  V(TypedArray, JSTypedArray)                  \
+  V(Uint8Array, JSTypedArray)                  \
+  V(Uint8ClampedArray, JSTypedArray)           \
+  V(Int8Array, JSTypedArray)                   \
+  V(Uint16Array, JSTypedArray)                 \
+  V(Int16Array, JSTypedArray)                  \
+  V(Uint32Array, JSTypedArray)                 \
+  V(Int32Array, JSTypedArray)                  \
+  V(Float32Array, JSTypedArray)                \
+  V(Float64Array, JSTypedArray)                \
+  V(DataView, JSDataView)                      \
+  V(SharedArrayBuffer, JSArrayBuffer)          \
+  V(Name, Name)                                \
+  V(String, String)                            \
+  V(Symbol, Symbol)                            \
+  V(Script, JSFunction)                        \
+  V(UnboundModuleScript, SharedFunctionInfo)   \
+  V(UnboundScript, SharedFunctionInfo)         \
+  V(Module, Module)                            \
+  V(Function, JSReceiver)                      \
+  V(Message, JSMessageObject)                  \
+  V(Context, Context)                          \
+  V(External, Object)                          \
+  V(StackTrace, FixedArray)                    \
+  V(StackFrame, StackFrameInfo)                \
+  V(Proxy, JSProxy)                            \
+  V(debug::GeneratorObject, JSGeneratorObject) \
+  V(debug::Script, Script)                     \
+  V(debug::WeakMap, JSWeakMap)                 \
+  V(Promise, JSPromise)                        \
+  V(Primitive, Object)                         \
+  V(PrimitiveArray, FixedArray)                \
+  V(BigInt, BigInt)                            \
+  V(ScriptOrModule, Script)
+
+class Utils {
+ public:
+  static inline bool ApiCheck(bool condition,
+                              const char* location,
+                              const char* message) {
+    if (!condition) Utils::ReportApiFailure(location, message);
+    return condition;
+  }
+  static void ReportOOMFailure(v8::internal::Isolate* isolate,
+                               const char* location, bool is_heap_oom);
+
+  static inline Local<Context> ToLocal(
+      v8::internal::Handle<v8::internal::Context> obj);
+  static inline Local<Value> ToLocal(
+      v8::internal::Handle<v8::internal::Object> obj);
+  static inline Local<Module> ToLocal(
+      v8::internal::Handle<v8::internal::Module> obj);
+  static inline Local<Name> ToLocal(
+      v8::internal::Handle<v8::internal::Name> obj);
+  static inline Local<String> ToLocal(
+      v8::internal::Handle<v8::internal::String> obj);
+  static inline Local<Symbol> ToLocal(
+      v8::internal::Handle<v8::internal::Symbol> obj);
+  static inline Local<RegExp> ToLocal(
+      v8::internal::Handle<v8::internal::JSRegExp> obj);
+  static inline Local<Object> ToLocal(
+      v8::internal::Handle<v8::internal::JSReceiver> obj);
+  static inline Local<Object> ToLocal(
+      v8::internal::Handle<v8::internal::JSObject> obj);
+  static inline Local<Function> ToLocal(
+      v8::internal::Handle<v8::internal::JSFunction> obj);
+  static inline Local<Array> ToLocal(
+      v8::internal::Handle<v8::internal::JSArray> obj);
+  static inline Local<Map> ToLocal(
+      v8::internal::Handle<v8::internal::JSMap> obj);
+  static inline Local<Set> ToLocal(
+      v8::internal::Handle<v8::internal::JSSet> obj);
+  static inline Local<Proxy> ToLocal(
+      v8::internal::Handle<v8::internal::JSProxy> obj);
+  static inline Local<ArrayBuffer> ToLocal(
+      v8::internal::Handle<v8::internal::JSArrayBuffer> obj);
+  static inline Local<ArrayBufferView> ToLocal(
+      v8::internal::Handle<v8::internal::JSArrayBufferView> obj);
+  static inline Local<DataView> ToLocal(
+      v8::internal::Handle<v8::internal::JSDataView> obj);
+  static inline Local<TypedArray> ToLocal(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Uint8Array> ToLocalUint8Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Uint8ClampedArray> ToLocalUint8ClampedArray(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Int8Array> ToLocalInt8Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Uint16Array> ToLocalUint16Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Int16Array> ToLocalInt16Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Uint32Array> ToLocalUint32Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Int32Array> ToLocalInt32Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Float32Array> ToLocalFloat32Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<Float64Array> ToLocalFloat64Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<BigInt64Array> ToLocalBigInt64Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+  static inline Local<BigUint64Array> ToLocalBigUint64Array(
+      v8::internal::Handle<v8::internal::JSTypedArray> obj);
+
+  static inline Local<SharedArrayBuffer> ToLocalShared(
+      v8::internal::Handle<v8::internal::JSArrayBuffer> obj);
+
+  static inline Local<Message> MessageToLocal(
+      v8::internal::Handle<v8::internal::Object> obj);
+  static inline Local<Promise> PromiseToLocal(
+      v8::internal::Handle<v8::internal::JSObject> obj);
+  static inline Local<StackTrace> StackTraceToLocal(
+      v8::internal::Handle<v8::internal::FixedArray> obj);
+  static inline Local<StackFrame> StackFrameToLocal(
+      v8::internal::Handle<v8::internal::StackFrameInfo> obj);
+  static inline Local<Number> NumberToLocal(
+      v8::internal::Handle<v8::internal::Object> obj);
+  static inline Local<Integer> IntegerToLocal(
+      v8::internal::Handle<v8::internal::Object> obj);
+  static inline Local<Uint32> Uint32ToLocal(
+      v8::internal::Handle<v8::internal::Object> obj);
+  static inline Local<BigInt> ToLocal(
+      v8::internal::Handle<v8::internal::BigInt> obj);
+  static inline Local<FunctionTemplate> ToLocal(
+      v8::internal::Handle<v8::internal::FunctionTemplateInfo> obj);
+  static inline Local<ObjectTemplate> ToLocal(
+      v8::internal::Handle<v8::internal::ObjectTemplateInfo> obj);
+  static inline Local<Signature> SignatureToLocal(
+      v8::internal::Handle<v8::internal::FunctionTemplateInfo> obj);
+  static inline Local<AccessorSignature> AccessorSignatureToLocal(
+      v8::internal::Handle<v8::internal::FunctionTemplateInfo> obj);
+  static inline Local<External> ExternalToLocal(
+      v8::internal::Handle<v8::internal::JSObject> obj);
+  static inline Local<Function> CallableToLocal(
+      v8::internal::Handle<v8::internal::JSReceiver> obj);
+  static inline Local<Primitive> ToLocalPrimitive(
+      v8::internal::Handle<v8::internal::Object> obj);
+  static inline Local<PrimitiveArray> ToLocal(
+      v8::internal::Handle<v8::internal::FixedArray> obj);
+  static inline Local<ScriptOrModule> ScriptOrModuleToLocal(
+      v8::internal::Handle<v8::internal::Script> obj);
+
+#define DECLARE_OPEN_HANDLE(From, To) \
+  static inline v8::internal::Handle<v8::internal::To> \
+      OpenHandle(const From* that, bool allow_empty_handle = false);
+
+OPEN_HANDLE_LIST(DECLARE_OPEN_HANDLE)
+
+#undef DECLARE_OPEN_HANDLE
+
+template <class From, class To>
+static inline Local<To> Convert(v8::internal::Handle<From> obj);
+
+template <class T>
+static inline v8::internal::Handle<v8::internal::Object> OpenPersistent(
+    const v8::Persistent<T>& persistent) {
+  return v8::internal::Handle<v8::internal::Object>(
+      reinterpret_cast<v8::internal::Object**>(persistent.val_));
+  }
+
+  template <class T>
+  static inline v8::internal::Handle<v8::internal::Object> OpenPersistent(
+      v8::Persistent<T>* persistent) {
+    return OpenPersistent(*persistent);
+  }
+
+  template <class From, class To>
+  static inline v8::internal::Handle<To> OpenHandle(v8::Local<From> handle) {
+    return OpenHandle(*handle);
+  }
+
+ private:
+  static void ReportApiFailure(const char* location, const char* message);
+};
+
+
+template <class T>
+inline T* ToApi(v8::internal::Handle<v8::internal::Object> obj) {
+  return reinterpret_cast<T*>(obj.location());
+}
+
+template <class T>
+inline v8::Local<T> ToApiHandle(
+    v8::internal::Handle<v8::internal::Object> obj) {
+  return Utils::Convert<v8::internal::Object, T>(obj);
+}
+
+
+template <class T>
+inline bool ToLocal(v8::internal::MaybeHandle<v8::internal::Object> maybe,
+                    Local<T>* local) {
+  v8::internal::Handle<v8::internal::Object> handle;
+  if (maybe.ToHandle(&handle)) {
+    *local = Utils::Convert<v8::internal::Object, T>(handle);
+    return true;
+  }
+  return false;
+}
+
+namespace internal {
+
+class V8_EXPORT_PRIVATE DeferredHandles {
+ public:
+  ~DeferredHandles();
+
+ private:
+  DeferredHandles(Object** first_block_limit, Isolate* isolate)
+      : next_(nullptr),
+        previous_(nullptr),
+        first_block_limit_(first_block_limit),
+        isolate_(isolate) {
+    isolate->LinkDeferredHandles(this);
+  }
+
+  void Iterate(RootVisitor* v);
+
+  std::vector<Object**> blocks_;
+  DeferredHandles* next_;
+  DeferredHandles* previous_;
+  Object** first_block_limit_;
+  Isolate* isolate_;
+
+  friend class HandleScopeImplementer;
+  friend class Isolate;
+};
+
+
+// This class is here in order to be able to declare it a friend of
+// HandleScope.  Moving these methods to be members of HandleScope would be
+// neat in some ways, but it would expose internal implementation details in
+// our public header file, which is undesirable.
+//
+// An isolate has a single instance of this class to hold the current thread's
+// data. In multithreaded V8 programs this data is copied in and out of storage
+// so that the currently executing thread always has its own copy of this
+// data.
+class HandleScopeImplementer {
+ public:
+  explicit HandleScopeImplementer(Isolate* isolate)
+      : isolate_(isolate),
+        microtask_context_(nullptr),
+        spare_(nullptr),
+        call_depth_(0),
+        microtasks_depth_(0),
+        microtasks_suppressions_(0),
+        entered_contexts_count_(0),
+        entered_context_count_during_microtasks_(0),
+#ifdef DEBUG
+        debug_microtasks_depth_(0),
+#endif
+        microtasks_policy_(v8::MicrotasksPolicy::kAuto),
+        last_handle_before_deferred_block_(nullptr) {
+  }
+
+  ~HandleScopeImplementer() {
+    DeleteArray(spare_);
+  }
+
+  // Threading support for handle data.
+  static int ArchiveSpacePerThread();
+  char* RestoreThread(char* from);
+  char* ArchiveThread(char* to);
+  void FreeThreadResources();
+
+  // Garbage collection support.
+  void Iterate(v8::internal::RootVisitor* v);
+  static char* Iterate(v8::internal::RootVisitor* v, char* data);
+
+  inline internal::Object** GetSpareOrNewBlock();
+  inline void DeleteExtensions(internal::Object** prev_limit);
+
+  // Call depth represents nested v8 api calls.
+  inline void IncrementCallDepth() {call_depth_++;}
+  inline void DecrementCallDepth() {call_depth_--;}
+  inline bool CallDepthIsZero() { return call_depth_ == 0; }
+
+  // Microtasks scope depth represents nested scopes controlling microtasks
+  // invocation, which happens when depth reaches zero.
+  inline void IncrementMicrotasksScopeDepth() {microtasks_depth_++;}
+  inline void DecrementMicrotasksScopeDepth() {microtasks_depth_--;}
+  inline int GetMicrotasksScopeDepth() { return microtasks_depth_; }
+
+  // Possibly nested microtasks suppression scopes prevent microtasks
+  // from running.
+  inline void IncrementMicrotasksSuppressions() {microtasks_suppressions_++;}
+  inline void DecrementMicrotasksSuppressions() {microtasks_suppressions_--;}
+  inline bool HasMicrotasksSuppressions() { return !!microtasks_suppressions_; }
+
+#ifdef DEBUG
+  // In debug we check that calls not intended to invoke microtasks are
+  // still correctly wrapped with microtask scopes.
+  inline void IncrementDebugMicrotasksScopeDepth() {debug_microtasks_depth_++;}
+  inline void DecrementDebugMicrotasksScopeDepth() {debug_microtasks_depth_--;}
+  inline bool DebugMicrotasksScopeDepthIsZero() {
+    return debug_microtasks_depth_ == 0;
+  }
+#endif
+
+  inline void set_microtasks_policy(v8::MicrotasksPolicy policy);
+  inline v8::MicrotasksPolicy microtasks_policy() const;
+
+  inline void EnterContext(Handle<Context> context);
+  inline void LeaveContext();
+  inline bool LastEnteredContextWas(Handle<Context> context);
+
+  // Returns the last entered context or an empty handle if no
+  // contexts have been entered.
+  inline Handle<Context> LastEnteredContext();
+
+  inline void EnterMicrotaskContext(Handle<Context> context);
+  inline void LeaveMicrotaskContext();
+  inline Handle<Context> MicrotaskContext();
+  inline bool MicrotaskContextIsLastEnteredContext() const {
+    return microtask_context_ &&
+           entered_context_count_during_microtasks_ == entered_contexts_.size();
+  }
+
+  inline void SaveContext(Context* context);
+  inline Context* RestoreContext();
+  inline bool HasSavedContexts();
+
+  inline DetachableVector<Object**>* blocks() { return &blocks_; }
+  Isolate* isolate() const { return isolate_; }
+
+  void ReturnBlock(Object** block) {
+    DCHECK_NOT_NULL(block);
+    if (spare_ != nullptr) DeleteArray(spare_);
+    spare_ = block;
+  }
+
+ private:
+  void ResetAfterArchive() {
+    blocks_.detach();
+    entered_contexts_.detach();
+    saved_contexts_.detach();
+    microtask_context_ = nullptr;
+    entered_context_count_during_microtasks_ = 0;
+    spare_ = nullptr;
+    last_handle_before_deferred_block_ = nullptr;
+    call_depth_ = 0;
+  }
+
+  void Free() {
+    DCHECK(blocks_.empty());
+    DCHECK(entered_contexts_.empty());
+    DCHECK(saved_contexts_.empty());
+    DCHECK(!microtask_context_);
+
+    blocks_.free();
+    entered_contexts_.free();
+    saved_contexts_.free();
+    if (spare_ != nullptr) {
+      DeleteArray(spare_);
+      spare_ = nullptr;
+    }
+    DCHECK_EQ(call_depth_, 0);
+  }
+
+  void BeginDeferredScope();
+  DeferredHandles* Detach(Object** prev_limit);
+
+  Isolate* isolate_;
+  DetachableVector<Object**> blocks_;
+  // Used as a stack to keep track of entered contexts.
+  DetachableVector<Context*> entered_contexts_;
+  // Used as a stack to keep track of saved contexts.
+  DetachableVector<Context*> saved_contexts_;
+  Context* microtask_context_;
+  Object** spare_;
+  int call_depth_;
+  int microtasks_depth_;
+  int microtasks_suppressions_;
+  size_t entered_contexts_count_;
+  size_t entered_context_count_during_microtasks_;
+#ifdef DEBUG
+  int debug_microtasks_depth_;
+#endif
+  v8::MicrotasksPolicy microtasks_policy_;
+  Object** last_handle_before_deferred_block_;
+  // This is only used for threading support.
+  HandleScopeData handle_scope_data_;
+
+  void IterateThis(RootVisitor* v);
+  char* RestoreThreadHelper(char* from);
+  char* ArchiveThreadHelper(char* to);
+
+  friend class DeferredHandles;
+  friend class DeferredHandleScope;
+  friend class HandleScopeImplementerOffsets;
+
+  DISALLOW_COPY_AND_ASSIGN(HandleScopeImplementer);
+};
+
+class HandleScopeImplementerOffsets {
+ public:
+  enum Offsets {
+    kMicrotaskContext = offsetof(HandleScopeImplementer, microtask_context_),
+    kEnteredContexts = offsetof(HandleScopeImplementer, entered_contexts_),
+    kEnteredContextsCount =
+        offsetof(HandleScopeImplementer, entered_contexts_count_),
+    kEnteredContextCountDuringMicrotasks = offsetof(
+        HandleScopeImplementer, entered_context_count_during_microtasks_)
+  };
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(HandleScopeImplementerOffsets);
+};
+
+const int kHandleBlockSize = v8::internal::KB - 2;  // fit in one page
+
+
+void HandleScopeImplementer::set_microtasks_policy(
+    v8::MicrotasksPolicy policy) {
+  microtasks_policy_ = policy;
+}
+
+
+v8::MicrotasksPolicy HandleScopeImplementer::microtasks_policy() const {
+  return microtasks_policy_;
+}
+
+
+void HandleScopeImplementer::SaveContext(Context* context) {
+  saved_contexts_.push_back(context);
+}
+
+
+Context* HandleScopeImplementer::RestoreContext() {
+  Context* last_context = saved_contexts_.back();
+  saved_contexts_.pop_back();
+  return last_context;
+}
+
+
+bool HandleScopeImplementer::HasSavedContexts() {
+  return !saved_contexts_.empty();
+}
+
+
+void HandleScopeImplementer::EnterContext(Handle<Context> context) {
+  entered_contexts_.push_back(*context);
+  entered_contexts_count_ = entered_contexts_.size();
+}
+
+void HandleScopeImplementer::LeaveContext() {
+  entered_contexts_.pop_back();
+  entered_contexts_count_ = entered_contexts_.size();
+}
+
+bool HandleScopeImplementer::LastEnteredContextWas(Handle<Context> context) {
+  return !entered_contexts_.empty() && entered_contexts_.back() == *context;
+}
+
+void HandleScopeImplementer::EnterMicrotaskContext(Handle<Context> context) {
+  DCHECK(!microtask_context_);
+  microtask_context_ = *context;
+  entered_context_count_during_microtasks_ = entered_contexts_.size();
+}
+
+void HandleScopeImplementer::LeaveMicrotaskContext() {
+  microtask_context_ = nullptr;
+  entered_context_count_during_microtasks_ = 0;
+}
+
+// If there's a spare block, use it for growing the current scope.
+internal::Object** HandleScopeImplementer::GetSpareOrNewBlock() {
+  internal::Object** block =
+      (spare_ != nullptr) ? spare_
+                          : NewArray<internal::Object*>(kHandleBlockSize);
+  spare_ = nullptr;
+  return block;
+}
+
+
+void HandleScopeImplementer::DeleteExtensions(internal::Object** prev_limit) {
+  while (!blocks_.empty()) {
+    internal::Object** block_start = blocks_.back();
+    internal::Object** block_limit = block_start + kHandleBlockSize;
+
+    // SealHandleScope may make the prev_limit to point inside the block.
+    if (block_start <= prev_limit && prev_limit <= block_limit) {
+#ifdef ENABLE_HANDLE_ZAPPING
+      internal::HandleScope::ZapRange(prev_limit, block_limit);
+#endif
+      break;
+    }
+
+    blocks_.pop_back();
+#ifdef ENABLE_HANDLE_ZAPPING
+    internal::HandleScope::ZapRange(block_start, block_limit);
+#endif
+    if (spare_ != nullptr) {
+      DeleteArray(spare_);
+    }
+    spare_ = block_start;
+  }
+  DCHECK((blocks_.empty() && prev_limit == nullptr) ||
+         (!blocks_.empty() && prev_limit != nullptr));
+}
+
+// Interceptor functions called from generated inline caches to notify
+// CPU profiler that external callbacks are invoked.
+void InvokeAccessorGetterCallback(
+    v8::Local<v8::Name> property,
+    const v8::PropertyCallbackInfo<v8::Value>& info,
+    v8::AccessorNameGetterCallback getter);
+
+void InvokeFunctionCallback(const v8::FunctionCallbackInfo<v8::Value>& info,
+                            v8::FunctionCallback callback);
+
+class Testing {
+ public:
+  static v8::Testing::StressType stress_type() { return stress_type_; }
+  static void set_stress_type(v8::Testing::StressType stress_type) {
+    stress_type_ = stress_type;
+  }
+
+ private:
+  static v8::Testing::StressType stress_type_;
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_API_H_