js/src/proxy/ScriptedProxyHandler.h
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 449035 66eb1f485c1a3ea81372758bc92292c9428b17cd
child 468314 427b854cdb1c47ce6a643f83245914d66dca4382
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- 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 proxy_ScriptedProxyHandler_h
#define proxy_ScriptedProxyHandler_h

#include "js/Proxy.h"

namespace js {

/* Derived class for all scripted proxy handlers. */
class ScriptedProxyHandler : public BaseProxyHandler {
 public:
  constexpr ScriptedProxyHandler() : BaseProxyHandler(&family) {}

  /* Standard internal methods. */
  virtual bool getOwnPropertyDescriptor(
      JSContext* cx, HandleObject proxy, HandleId id,
      MutableHandle<PropertyDescriptor> desc) const override;
  virtual bool defineProperty(JSContext* cx, HandleObject proxy, HandleId id,
                              Handle<PropertyDescriptor> desc,
                              ObjectOpResult& result) const override;
  virtual bool ownPropertyKeys(JSContext* cx, HandleObject proxy,
                               AutoIdVector& props) const override;
  virtual bool delete_(JSContext* cx, HandleObject proxy, HandleId id,
                       ObjectOpResult& result) const override;

  virtual bool getPrototype(JSContext* cx, HandleObject proxy,
                            MutableHandleObject protop) const override;
  virtual bool setPrototype(JSContext* cx, HandleObject proxy,
                            HandleObject proto,
                            ObjectOpResult& result) const override;
  /* Non-standard, but needed to correctly implement OrdinaryGetPrototypeOf. */
  virtual bool getPrototypeIfOrdinary(
      JSContext* cx, HandleObject proxy, bool* isOrdinary,
      MutableHandleObject protop) const override;
  /* Non-standard, but needed to handle revoked proxies. */
  virtual bool setImmutablePrototype(JSContext* cx, HandleObject proxy,
                                     bool* succeeded) const override;

  virtual bool preventExtensions(JSContext* cx, HandleObject proxy,
                                 ObjectOpResult& result) const override;
  virtual bool isExtensible(JSContext* cx, HandleObject proxy,
                            bool* extensible) const override;

  virtual bool has(JSContext* cx, HandleObject proxy, HandleId id,
                   bool* bp) const override;
  virtual bool get(JSContext* cx, HandleObject proxy, HandleValue receiver,
                   HandleId id, MutableHandleValue vp) const override;
  virtual bool set(JSContext* cx, HandleObject proxy, HandleId id,
                   HandleValue v, HandleValue receiver,
                   ObjectOpResult& result) const override;
  virtual bool call(JSContext* cx, HandleObject proxy,
                    const CallArgs& args) const override;
  virtual bool construct(JSContext* cx, HandleObject proxy,
                         const CallArgs& args) const override;

  /* SpiderMonkey extensions. */
  virtual bool hasOwn(JSContext* cx, HandleObject proxy, HandleId id,
                      bool* bp) const override {
    return BaseProxyHandler::hasOwn(cx, proxy, id, bp);
  }

  // A scripted proxy should not be treated as generic in most contexts.
  virtual bool nativeCall(JSContext* cx, IsAcceptableThis test, NativeImpl impl,
                          const CallArgs& args) const override;
  virtual bool hasInstance(JSContext* cx, HandleObject proxy,
                           MutableHandleValue v, bool* bp) const override;
  virtual bool getBuiltinClass(JSContext* cx, HandleObject proxy,
                               ESClass* cls) const override;
  virtual bool isArray(JSContext* cx, HandleObject proxy,
                       JS::IsArrayAnswer* answer) const override;
  virtual const char* className(JSContext* cx,
                                HandleObject proxy) const override;
  virtual JSString* fun_toString(JSContext* cx, HandleObject proxy,
                                 bool isToSource) const override;
  virtual RegExpShared* regexp_toShared(JSContext* cx,
                                        HandleObject proxy) const override;
  virtual bool boxedValue_unbox(JSContext* cx, HandleObject proxy,
                                MutableHandleValue vp) const override;

  virtual bool isCallable(JSObject* obj) const override;
  virtual bool isConstructor(JSObject* obj) const override;

  virtual bool isScripted() const override { return true; }

  static const char family;
  static const ScriptedProxyHandler singleton;

  // The "proxy extra" slot index in which the handler is stored. Revocable
  // proxies need to set this at revocation time.
  static const int HANDLER_EXTRA = 0;
  static const int IS_CALLCONSTRUCT_EXTRA = 1;
  // Bitmasks for the "call/construct" slot
  static const int IS_CALLABLE = 1 << 0;
  static const int IS_CONSTRUCTOR = 1 << 1;
  // The "function extended" slot index in which the revocation object is
  // stored. Per spec, this is to be cleared during the first revocation.
  static const int REVOKE_SLOT = 0;

  static JSObject* handlerObject(const JSObject* proxy);
};

bool proxy(JSContext* cx, unsigned argc, Value* vp);

bool proxy_revocable(JSContext* cx, unsigned argc, Value* vp);

} /* namespace js */

#endif /* proxy_ScriptedProxyHandler_h */