nsScriptError.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this file,

 * You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_nsScriptError_h

#define mozilla_dom_nsScriptError_h

#include "mozilla/Atomics.h"

#include <stdint.h>

#include "jsapi.h"

#include "js/RootingAPI.h"

#include "nsCOMArray.h"

#include "nsCycleCollectionParticipant.h"

#include "nsIScriptError.h"

#include "nsString.h"

class nsGlobalWindowInner;

class nsScriptErrorNote final : public nsIScriptErrorNote {

 public:

  nsScriptErrorNote();

  NS_DECL_THREADSAFE_ISUPPORTS

  NS_DECL_NSISCRIPTERRORNOTE

  void Init(const nsAString& message, const nsACString& sourceName,

            uint32_t sourceId, uint32_t lineNumber, uint32_t columnNumber);

 private:

  virtual ~nsScriptErrorNote();

  nsString mMessage;

  nsCString mSourceName;

  nsString mCssSelectors;

  uint32_t mSourceId;

  uint32_t mLineNumber;

  uint32_t mColumnNumber;

};

// Definition of nsScriptError..

class nsScriptErrorBase : public nsIScriptError {

 public:

  nsScriptErrorBase();

  NS_DECL_NSICONSOLEMESSAGE

  NS_DECL_NSISCRIPTERROR

  void AddNote(nsIScriptErrorNote* note);

  static bool ComputeIsFromPrivateWindow(nsGlobalWindowInner* aWindow);

  static bool ComputeIsFromChromeContext(nsGlobalWindowInner* aWindow);

 protected:

  virtual ~nsScriptErrorBase();

  void InitializeOnMainThread();

  void InitializationHelper(const nsAString& message, uint32_t lineNumber,

                            uint32_t columnNumber, uint32_t flags,

                            const nsACString& category, uint64_t aInnerWindowID,

                            bool aFromChromeContext);

  nsCOMArray<nsIScriptErrorNote> mNotes;

  nsString mMessage;

  nsString mMessageName;

  nsCString mSourceName;

  nsString mCssSelectors;

  uint32_t mSourceId;

  uint32_t mLineNumber;

  uint32_t mColumnNumber;

  uint32_t mFlags;

  nsCString mCategory;

  // mOuterWindowID is set on the main thread from InitializeOnMainThread().

  uint64_t mOuterWindowID;

  uint64_t mInnerWindowID;

  int64_t mMicroSecondTimeStamp;

  // mInitializedOnMainThread, mIsFromPrivateWindow and mIsFromChromeContext are

  // set on the main thread from InitializeOnMainThread().

  mozilla::Atomic<bool> mInitializedOnMainThread;

  bool mIsFromPrivateWindow;

  bool mIsFromChromeContext;

  bool mIsPromiseRejection;

  bool mIsForwardedFromContentProcess;

};

class nsScriptError final : public nsScriptErrorBase {

 public:

  nsScriptError() = default;

  NS_DECL_THREADSAFE_ISUPPORTS

 private:

  virtual ~nsScriptError() = default;

};

class nsScriptErrorWithStack : public nsScriptErrorBase {

 public:

  nsScriptErrorWithStack(JS::Handle<mozilla::Maybe<JS::Value>> aException,

                         JS::Handle<JSObject*> aStack,

                         JS::Handle<JSObject*> aStackGlobal);

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS

  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsScriptErrorWithStack)

  NS_IMETHOD GetHasException(bool*) override;

  NS_IMETHOD GetException(JS::MutableHandle<JS::Value>) override;

  NS_IMETHOD GetStack(JS::MutableHandle<JS::Value>) override;

  NS_IMETHOD GetStackGlobal(JS::MutableHandle<JS::Value>) override;

  NS_IMETHOD ToString(nsACString& aResult) override;

 private:

  virtual ~nsScriptErrorWithStack();

  // The "exception" value.

  JS::Heap<JS::Value> mException;

  bool mHasException;

  // Complete stackframe where the error happened.

  // Must be a (possibly wrapped) SavedFrame object.

  JS::Heap<JSObject*> mStack;

  // Global object that must be same-compartment with mStack.

  JS::Heap<JSObject*> mStackGlobal;

};

// Creates either nsScriptErrorWithStack or nsScriptError,

// depending on whether |aStack| or |aException| is passed.

// Additionally when the first (optional) |win| argument is

// provided this function makes sure that the GlobalWindow

// isn't already dying to prevent leaks.

already_AddRefed<nsScriptErrorBase> CreateScriptError(

    nsGlobalWindowInner* win, JS::Handle<mozilla::Maybe<JS::Value>> aException,

    JS::Handle<JSObject*> aStack, JS::Handle<JSObject*> aStackGlobal);

#endif /* mozilla_dom_nsScriptError_h */