The Tor Browser: js/xpconnect/src/XPCComponents.cpp@a63d609f5ebe (annotated)

js/xpconnect/src/XPCComponents.cpp@a63d609f5ebe (annotated)

js/xpconnect/src/XPCComponents.cpp

Thu, 15 Jan 2015 15:55:04 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 15:55:04 +0100
branch: TOR_BUG_9701
changeset 9: a63d609f5ebe
permissions: -rw-r--r--

Back out 97036ab72558 which inappropriately compared turds to third parties.

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* vim: set ts=8 sts=4 et sw=4 tw=99: */
 /* 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/. */
 /* The "Components" xpcom objects for JavaScript. */
 #include "xpcprivate.h"
 #include "xpcIJSModuleLoader.h"
 #include "XPCJSWeakReference.h"
 #include "WrapperFactory.h"
 #include "nsJSUtils.h"
 #include "mozJSComponentLoader.h"
 #include "nsContentUtils.h"
 #include "jsfriendapi.h"
 #include "js/StructuredClone.h"
 #include "mozilla/Attributes.h"
 #include "nsJSEnvironment.h"
 #include "mozilla/XPTInterfaceInfoManager.h"
 #include "mozilla/dom/DOMException.h"
 #include "mozilla/dom/DOMExceptionBinding.h"
 #include "mozilla/dom/BindingUtils.h"
 #include "mozilla/dom/StructuredCloneTags.h"
 #include "nsZipArchive.h"
 #include "nsIDOMFile.h"
 #include "nsIDOMFileList.h"
 #include "nsWindowMemoryReporter.h"
 using namespace mozilla;
 using namespace JS;
 using namespace js;
 using namespace xpc;
 using mozilla::dom::Exception;
 /***************************************************************************/
 // stuff used by all
 nsresult
 xpc::ThrowAndFail(nsresult errNum, JSContext *cx, bool *retval)
 {
     XPCThrower::Throw(errNum, cx);
     *retval = false;
     return NS_OK;
 }
 static bool
 JSValIsInterfaceOfType(JSContext *cx, HandleValue v, REFNSIID iid)
 {
     nsCOMPtr<nsIXPConnectWrappedNative> wn;
     nsCOMPtr<nsISupports> sup;
     nsISupports* iface;
     if (v.isPrimitive())
         return false;
     nsXPConnect* xpc = nsXPConnect::XPConnect();
     RootedObject obj(cx, &v.toObject());
     if (NS_SUCCEEDED(xpc->GetWrappedNativeOfJSObject(cx, obj, getter_AddRefs(wn))) && wn &&
         NS_SUCCEEDED(wn->Native()->QueryInterface(iid, (void**)&iface)) && iface)
     {
         NS_RELEASE(iface);
         return true;
     }
     return false;
 }
 char *
 xpc::CloneAllAccess()
 {
     static const char allAccess[] = "AllAccess";
     return (char*)nsMemory::Clone(allAccess, sizeof(allAccess));
 }
 char *
 xpc::CheckAccessList(const char16_t *wideName, const char *const list[])
 {
     nsAutoCString asciiName;
     CopyUTF16toUTF8(nsDependentString(wideName), asciiName);
     for (const char* const* p = list; *p; p++)
         if (!strcmp(*p, asciiName.get()))
             return CloneAllAccess();
     return nullptr;
 }
 /***************************************************************************/
 /***************************************************************************/
 /***************************************************************************/
 class nsXPCComponents_Interfaces :
             public nsIXPCComponents_Interfaces,
             public nsIXPCScriptable,
             public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_INTERFACES
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_Interfaces();
     virtual ~nsXPCComponents_Interfaces();
 private:
     nsCOMArray<nsIInterfaceInfo> mInterfaces;
 };
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_Interfaces)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetHelperForLanguage(uint32_t language,
                                                  nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_Interfaces";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetFlags(uint32_t *aFlags)
 {
     // Mark ourselves as a DOM object so that instances may be created in
     // unprivileged scopes.
     *aFlags = nsIClassInfo::DOM_OBJECT;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_Interfaces::nsXPCComponents_Interfaces()
 {
 }
 nsXPCComponents_Interfaces::~nsXPCComponents_Interfaces()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_Interfaces)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_Interfaces)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_Interfaces)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_Interfaces)
 NS_IMPL_RELEASE(nsXPCComponents_Interfaces)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_Interfaces
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_Interfaces"
 #define                             XPC_MAP_WANT_NEWRESOLVE
 #define                             XPC_MAP_WANT_NEWENUMERATE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::DONT_ENUM_STATIC_PROPS |\
                                     nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool newEnumerate (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t enum_op, in JSValPtr statep, out JSID idp); */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::NewEnumerate(nsIXPConnectWrappedNative *wrapper,
                                          JSContext * cx, JSObject * obj,
                                          uint32_t enum_op, jsval * statep,
                                          jsid * idp, bool *_retval)
 {
     switch (enum_op) {
         case JSENUMERATE_INIT:
         case JSENUMERATE_INIT_ALL:
         {
             // Lazily init the list of interfaces when someone tries to
             // enumerate them.
             if (mInterfaces.IsEmpty()) {
                 XPTInterfaceInfoManager::GetSingleton()->
                     GetScriptableInterfaces(mInterfaces);
             }
             *statep = JSVAL_ZERO;
             if (idp)
                 *idp = INT_TO_JSID(mInterfaces.Length());
             return NS_OK;
         }
         case JSENUMERATE_NEXT:
         {
             uint32_t idx = JSVAL_TO_INT(*statep);
             nsIInterfaceInfo* interface = mInterfaces.SafeElementAt(idx);
             *statep = UINT_TO_JSVAL(idx + 1);
             if (interface) {
                 const char* name;
                 RootedId id(cx);
                 if (NS_SUCCEEDED(interface->GetNameShared(&name)) && name) {
                     RootedString idstr(cx, JS_NewStringCopyZ(cx, name));
                     if (idstr && JS_StringToId(cx, idstr, &id)) {
                         *idp = id;
                         return NS_OK;
                     }
                 }
             }
             // fall through
         }
         case JSENUMERATE_DESTROY:
         default:
             *statep = JSVAL_NULL;
             return NS_OK;
     }
 }
 /* bool newResolve (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval id, out JSObjectPtr objp); */
 NS_IMETHODIMP
 nsXPCComponents_Interfaces::NewResolve(nsIXPConnectWrappedNative *wrapper,
                                        JSContext *cx, JSObject *objArg,
                                        jsid idArg, JSObject **objp,
                                        bool *_retval)
 {
     RootedObject obj(cx, objArg);
     RootedId id(cx, idArg);
     if (!JSID_IS_STRING(id))
         return NS_OK;
     JSAutoByteString name;
     RootedString str(cx, JSID_TO_STRING(id));
     // we only allow interfaces by name here
     if (name.encodeLatin1(cx, str) && name.ptr()[0] != '{') {
         nsCOMPtr<nsIInterfaceInfo> info;
         XPTInterfaceInfoManager::GetSingleton()->
             GetInfoForName(name.ptr(), getter_AddRefs(info));
         if (!info)
             return NS_OK;
         nsCOMPtr<nsIJSIID> nsid = nsJSIID::NewID(info);
         if (nsid) {
             nsXPConnect* xpc = nsXPConnect::XPConnect();
             nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
             if (NS_SUCCEEDED(xpc->WrapNative(cx, obj,
                                              static_cast<nsIJSIID*>(nsid),
                                              NS_GET_IID(nsIJSIID),
                                              getter_AddRefs(holder)))) {
                 RootedObject idobj(cx);
                 if (holder &&
                     // Assign, not compare
                     (idobj = holder->GetJSObject())) {
                     *objp = obj;
                     *_retval = JS_DefinePropertyById(cx, obj, id,
                                                      OBJECT_TO_JSVAL(idobj),
                                                      nullptr, nullptr,
                                                      JSPROP_ENUMERATE |
                                                      JSPROP_READONLY |
                                                      JSPROP_PERMANENT);
                 }
             }
         }
     }
     return NS_OK;
 }
 /***************************************************************************/
 /***************************************************************************/
 /***************************************************************************/
 class nsXPCComponents_InterfacesByID :
             public nsIXPCComponents_InterfacesByID,
             public nsIXPCScriptable,
             public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_INTERFACESBYID
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_InterfacesByID();
     virtual ~nsXPCComponents_InterfacesByID();
 private:
     nsCOMArray<nsIInterfaceInfo> mInterfaces;
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_InterfacesByID)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetHelperForLanguage(uint32_t language,
                                                      nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_InterfacesByID";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetFlags(uint32_t *aFlags)
 {
     // Mark ourselves as a DOM object so that instances may be created in
     // unprivileged scopes.
     *aFlags = nsIClassInfo::DOM_OBJECT;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_InterfacesByID::nsXPCComponents_InterfacesByID()
 {
 }
 nsXPCComponents_InterfacesByID::~nsXPCComponents_InterfacesByID()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_InterfacesByID)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_InterfacesByID)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_InterfacesByID)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_InterfacesByID)
 NS_IMPL_RELEASE(nsXPCComponents_InterfacesByID)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_InterfacesByID
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_InterfacesByID"
 #define                             XPC_MAP_WANT_NEWRESOLVE
 #define                             XPC_MAP_WANT_NEWENUMERATE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::DONT_ENUM_STATIC_PROPS |\
                                     nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool newEnumerate (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t enum_op, in JSValPtr statep, out JSID idp); */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::NewEnumerate(nsIXPConnectWrappedNative *wrapper,
                                              JSContext * cx, JSObject * obj,
                                              uint32_t enum_op, jsval * statep,
                                              jsid * idp, bool *_retval)
 {
     switch (enum_op) {
         case JSENUMERATE_INIT:
         case JSENUMERATE_INIT_ALL:
         {
             // Lazily init the list of interfaces when someone tries to
             // enumerate them.
             if (mInterfaces.IsEmpty()) {
                 XPTInterfaceInfoManager::GetSingleton()->
                     GetScriptableInterfaces(mInterfaces);
             }
             *statep = JSVAL_ZERO;
             if (idp)
                 *idp = INT_TO_JSID(mInterfaces.Length());
             return NS_OK;
         }
         case JSENUMERATE_NEXT:
         {
             uint32_t idx = JSVAL_TO_INT(*statep);
             nsIInterfaceInfo* interface = mInterfaces.SafeElementAt(idx);
             *statep = UINT_TO_JSVAL(idx + 1);
             if (interface) {
                 nsIID const *iid;
                 char idstr[NSID_LENGTH];
                 if (NS_SUCCEEDED(interface->GetIIDShared(&iid))) {
                     iid->ToProvidedString(idstr);
                     RootedString jsstr(cx, JS_NewStringCopyZ(cx, idstr));
                     RootedId id(cx);
                     if (jsstr && JS_StringToId(cx, jsstr, &id)) {
                         *idp = id;
                         return NS_OK;
                     }
                 }
             }
             // FALL THROUGH
         }
         case JSENUMERATE_DESTROY:
         default:
             *statep = JSVAL_NULL;
             return NS_OK;
     }
 }
 /* bool newResolve (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval id, out JSObjectPtr objp); */
 NS_IMETHODIMP
 nsXPCComponents_InterfacesByID::NewResolve(nsIXPConnectWrappedNative *wrapper,
                                            JSContext *cx, JSObject *objArg,
                                            jsid idArg, JSObject **objp,
                                            bool *_retval)
 {
     RootedObject obj(cx, objArg);
     RootedId id(cx, idArg);
     if (!JSID_IS_STRING(id))
         return NS_OK;
     RootedString str(cx, JSID_TO_STRING(id));
     if (38 != JS_GetStringLength(str))
         return NS_OK;
     if (const jschar *name = JS_GetInternedStringChars(str)) {
         nsID iid;
         if (!iid.Parse(NS_ConvertUTF16toUTF8(name).get()))
             return NS_OK;
         nsCOMPtr<nsIInterfaceInfo> info;
         XPTInterfaceInfoManager::GetSingleton()->
             GetInfoForIID(&iid, getter_AddRefs(info));
         if (!info)
             return NS_OK;
         nsCOMPtr<nsIJSIID> nsid = nsJSIID::NewID(info);
         if (!nsid)
             return NS_ERROR_OUT_OF_MEMORY;
         nsXPConnect* xpc = nsXPConnect::XPConnect();
         nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
         if (NS_SUCCEEDED(xpc->WrapNative(cx, obj,
                                          static_cast<nsIJSIID*>(nsid),
                                             NS_GET_IID(nsIJSIID),
                                             getter_AddRefs(holder)))) {
             RootedObject idobj(cx);
             if (holder &&
                 // Assign, not compare
                 (idobj = holder->GetJSObject())) {
                 *objp = obj;
                 *_retval =
                     JS_DefinePropertyById(cx, obj, id,
                                           OBJECT_TO_JSVAL(idobj),
                                           nullptr, nullptr,
                                           JSPROP_ENUMERATE |
                                           JSPROP_READONLY |
                                           JSPROP_PERMANENT);
             }
         }
     }
     return NS_OK;
 }
 /***************************************************************************/
 /***************************************************************************/
 /***************************************************************************/
 class nsXPCComponents_Classes :
   public nsIXPCComponents_Classes,
   public nsIXPCScriptable,
   public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_CLASSES
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_Classes();
     virtual ~nsXPCComponents_Classes();
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_Classes)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetHelperForLanguage(uint32_t language,
                                               nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_Classes";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetFlags(uint32_t *aFlags)
 {
     *aFlags = 0;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_Classes::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_Classes::nsXPCComponents_Classes()
 {
 }
 nsXPCComponents_Classes::~nsXPCComponents_Classes()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_Classes)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_Classes)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_Classes)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_Classes)
 NS_IMPL_RELEASE(nsXPCComponents_Classes)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_Classes
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_Classes"
 #define                             XPC_MAP_WANT_NEWRESOLVE
 #define                             XPC_MAP_WANT_NEWENUMERATE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::DONT_ENUM_STATIC_PROPS |\
                                     nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool newEnumerate (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t enum_op, in JSValPtr statep, out JSID idp); */
 NS_IMETHODIMP
 nsXPCComponents_Classes::NewEnumerate(nsIXPConnectWrappedNative *wrapper,
                                       JSContext * cx, JSObject * obj,
                                       uint32_t enum_op, jsval * statep,
                                       jsid * idp, bool *_retval)
 {
     nsISimpleEnumerator* e;
     switch (enum_op) {
         case JSENUMERATE_INIT:
         case JSENUMERATE_INIT_ALL:
         {
             nsCOMPtr<nsIComponentRegistrar> compMgr;
             if (NS_FAILED(NS_GetComponentRegistrar(getter_AddRefs(compMgr))) || !compMgr ||
                 NS_FAILED(compMgr->EnumerateContractIDs(&e)) || !e ) {
                 *statep = JSVAL_NULL;
                 return NS_ERROR_UNEXPECTED;
             }
             *statep = PRIVATE_TO_JSVAL(e);
             if (idp)
                 *idp = INT_TO_JSID(0); // indicate that we don't know the count
             return NS_OK;
         }
         case JSENUMERATE_NEXT:
         {
             nsCOMPtr<nsISupports> isup;
             bool hasMore;
             e = (nsISimpleEnumerator*) JSVAL_TO_PRIVATE(*statep);
             if (NS_SUCCEEDED(e->HasMoreElements(&hasMore)) && hasMore &&
                 NS_SUCCEEDED(e->GetNext(getter_AddRefs(isup))) && isup) {
                 nsCOMPtr<nsISupportsCString> holder(do_QueryInterface(isup));
                 if (holder) {
                     nsAutoCString name;
                     if (NS_SUCCEEDED(holder->GetData(name))) {
                         RootedString idstr(cx, JS_NewStringCopyN(cx, name.get(), name.Length()));
                         RootedId id(cx);
                         if (idstr && JS_StringToId(cx, idstr, &id)) {
                             *idp = id;
                             return NS_OK;
                         }
                     }
                 }
             }
             // else... FALL THROUGH
         }
         case JSENUMERATE_DESTROY:
         default:
             e = (nsISimpleEnumerator*) JSVAL_TO_PRIVATE(*statep);
             NS_IF_RELEASE(e);
             *statep = JSVAL_NULL;
             return NS_OK;
     }
 }
 /* bool newResolve (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval id, out JSObjectPtr objp); */
 NS_IMETHODIMP
 nsXPCComponents_Classes::NewResolve(nsIXPConnectWrappedNative *wrapper,
                                     JSContext *cx, JSObject *objArg,
                                     jsid idArg, JSObject **objp,
                                     bool *_retval)
 {
     RootedId id(cx, idArg);
     RootedObject obj(cx, objArg);
     JSAutoByteString name;
     if (JSID_IS_STRING(id) &&
         name.encodeLatin1(cx, JSID_TO_STRING(id)) &&
         name.ptr()[0] != '{') { // we only allow contractids here
         nsCOMPtr<nsIJSCID> nsid = nsJSCID::NewID(name.ptr());
         if (nsid) {
             nsXPConnect* xpc = nsXPConnect::XPConnect();
             nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
             if (NS_SUCCEEDED(xpc->WrapNative(cx, obj,
                                              static_cast<nsIJSCID*>(nsid),
                                              NS_GET_IID(nsIJSCID),
                                              getter_AddRefs(holder)))) {
                 RootedObject idobj(cx);
                 if (holder &&
                     // Assign, not compare
                         (idobj = holder->GetJSObject())) {
                     *objp = obj;
                     *_retval = JS_DefinePropertyById(cx, obj, id,
                                                      OBJECT_TO_JSVAL(idobj),
                                                      nullptr, nullptr,
                                                      JSPROP_ENUMERATE |
                                                      JSPROP_READONLY |
                                                      JSPROP_PERMANENT);
                 }
             }
         }
     }
     return NS_OK;
 }
 /***************************************************************************/
 /***************************************************************************/
 /***************************************************************************/
 class nsXPCComponents_ClassesByID :
   public nsIXPCComponents_ClassesByID,
   public nsIXPCScriptable,
   public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_CLASSESBYID
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_ClassesByID();
     virtual ~nsXPCComponents_ClassesByID();
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_ClassesByID)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetHelperForLanguage(uint32_t language,
                                                   nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_ClassesByID";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetFlags(uint32_t *aFlags)
 {
     *aFlags = 0;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_ClassesByID::nsXPCComponents_ClassesByID()
 {
 }
 nsXPCComponents_ClassesByID::~nsXPCComponents_ClassesByID()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_ClassesByID)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_ClassesByID)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_ClassesByID)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_ClassesByID)
 NS_IMPL_RELEASE(nsXPCComponents_ClassesByID)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_ClassesByID
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_ClassesByID"
 #define                             XPC_MAP_WANT_NEWRESOLVE
 #define                             XPC_MAP_WANT_NEWENUMERATE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::DONT_ENUM_STATIC_PROPS |\
                                     nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool newEnumerate (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t enum_op, in JSValPtr statep, out JSID idp); */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::NewEnumerate(nsIXPConnectWrappedNative *wrapper,
                                           JSContext * cx, JSObject * obj,
                                           uint32_t enum_op, jsval * statep,
                                           jsid * idp, bool *_retval)
 {
     nsISimpleEnumerator* e;
     switch (enum_op) {
         case JSENUMERATE_INIT:
         case JSENUMERATE_INIT_ALL:
         {
             nsCOMPtr<nsIComponentRegistrar> compMgr;
             if (NS_FAILED(NS_GetComponentRegistrar(getter_AddRefs(compMgr))) || !compMgr ||
                 NS_FAILED(compMgr->EnumerateCIDs(&e)) || !e ) {
                 *statep = JSVAL_NULL;
                 return NS_ERROR_UNEXPECTED;
             }
             *statep = PRIVATE_TO_JSVAL(e);
             if (idp)
                 *idp = INT_TO_JSID(0); // indicate that we don't know the count
             return NS_OK;
         }
         case JSENUMERATE_NEXT:
         {
             nsCOMPtr<nsISupports> isup;
             bool hasMore;
             e = (nsISimpleEnumerator*) JSVAL_TO_PRIVATE(*statep);
             if (NS_SUCCEEDED(e->HasMoreElements(&hasMore)) && hasMore &&
                 NS_SUCCEEDED(e->GetNext(getter_AddRefs(isup))) && isup) {
                 nsCOMPtr<nsISupportsID> holder(do_QueryInterface(isup));
                 if (holder) {
                     char* name;
                     if (NS_SUCCEEDED(holder->ToString(&name)) && name) {
                         RootedString idstr(cx, JS_NewStringCopyZ(cx, name));
                         nsMemory::Free(name);
                         RootedId id(cx);
                         if (idstr && JS_StringToId(cx, idstr, &id)) {
                             *idp = id;
                             return NS_OK;
                         }
                     }
                 }
             }
             // else... FALL THROUGH
         }
         case JSENUMERATE_DESTROY:
         default:
             e = (nsISimpleEnumerator*) JSVAL_TO_PRIVATE(*statep);
             NS_IF_RELEASE(e);
             *statep = JSVAL_NULL;
             return NS_OK;
     }
 }
 static bool
 IsRegisteredCLSID(const char* str)
 {
     bool registered;
     nsID id;
     if (!id.Parse(str))
         return false;
     nsCOMPtr<nsIComponentRegistrar> compMgr;
     if (NS_FAILED(NS_GetComponentRegistrar(getter_AddRefs(compMgr))) || !compMgr ||
         NS_FAILED(compMgr->IsCIDRegistered(id, &registered)))
         return false;
     return registered;
 }
 /* bool newResolve (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval id, out JSObjectPtr objp); */
 NS_IMETHODIMP
 nsXPCComponents_ClassesByID::NewResolve(nsIXPConnectWrappedNative *wrapper,
                                         JSContext *cx, JSObject *objArg,
                                         jsid idArg, JSObject **objp,
                                         bool *_retval)
 {
     RootedObject obj(cx, objArg);
     RootedId id(cx, idArg);
     if (!JSID_IS_STRING(id))
         return NS_OK;
     JSAutoByteString name;
     RootedString str(cx, JSID_TO_STRING(id));
     if (name.encodeLatin1(cx, str) && name.ptr()[0] == '{' &&
         IsRegisteredCLSID(name.ptr())) // we only allow canonical CLSIDs here
     {
         nsCOMPtr<nsIJSCID> nsid = nsJSCID::NewID(name.ptr());
         if (nsid) {
             nsXPConnect* xpc = nsXPConnect::XPConnect();
             nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
             if (NS_SUCCEEDED(xpc->WrapNative(cx, obj,
                                              static_cast<nsIJSCID*>(nsid),
                                              NS_GET_IID(nsIJSCID),
                                              getter_AddRefs(holder)))) {
                 RootedObject idobj(cx);
                 if (holder &&
                     // Assign, not compare
                     (idobj = holder->GetJSObject())) {
                     *objp = obj;
                     *_retval = JS_DefinePropertyById(cx, obj, id,
                                                      ObjectValue(*idobj),
                                                      nullptr, nullptr,
                                                      JSPROP_ENUMERATE |
                                                      JSPROP_READONLY |
                                                      JSPROP_PERMANENT);
                 }
             }
         }
     }
     return NS_OK;
 }
 /***************************************************************************/
 // Currently the possible results do not change at runtime, so they are only
 // cached once (unlike ContractIDs, CLSIDs, and IIDs)
 class nsXPCComponents_Results :
   public nsIXPCComponents_Results,
   public nsIXPCScriptable,
   public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_RESULTS
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_Results();
     virtual ~nsXPCComponents_Results();
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_Results)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetHelperForLanguage(uint32_t language,
                                               nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_Results";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetFlags(uint32_t *aFlags)
 {
     // Mark ourselves as a DOM object so that instances may be created in
     // unprivileged scopes.
     *aFlags = nsIClassInfo::DOM_OBJECT;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_Results::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_Results::nsXPCComponents_Results()
 {
 }
 nsXPCComponents_Results::~nsXPCComponents_Results()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_Results)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_Results)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_Results)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_Results)
 NS_IMPL_RELEASE(nsXPCComponents_Results)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_Results
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_Results"
 #define                             XPC_MAP_WANT_NEWRESOLVE
 #define                             XPC_MAP_WANT_NEWENUMERATE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::DONT_ENUM_STATIC_PROPS |\
                                     nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool newEnumerate (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t enum_op, in JSValPtr statep, out JSID idp); */
 NS_IMETHODIMP
 nsXPCComponents_Results::NewEnumerate(nsIXPConnectWrappedNative *wrapper,
                                       JSContext * cx, JSObject * obj,
                                       uint32_t enum_op, jsval * statep,
                                       jsid * idp, bool *_retval)
 {
     const void** iter;
     switch (enum_op) {
         case JSENUMERATE_INIT:
         case JSENUMERATE_INIT_ALL:
         {
             if (idp)
                 *idp = INT_TO_JSID(nsXPCException::GetNSResultCount());
             void** space = (void**) new char[sizeof(void*)];
             *space = nullptr;
             *statep = PRIVATE_TO_JSVAL(space);
             return NS_OK;
         }
         case JSENUMERATE_NEXT:
         {
             const char* name;
             iter = (const void**) JSVAL_TO_PRIVATE(*statep);
             if (nsXPCException::IterateNSResults(nullptr, &name, nullptr, iter)) {
                 RootedString idstr(cx, JS_NewStringCopyZ(cx, name));
                 JS::RootedId id(cx);
                 if (idstr && JS_StringToId(cx, idstr, &id)) {
                     *idp = id;
                     return NS_OK;
                 }
             }
             // else... FALL THROUGH
         }
         case JSENUMERATE_DESTROY:
         default:
             iter = (const void**) JSVAL_TO_PRIVATE(*statep);
             delete [] (char*) iter;
             *statep = JSVAL_NULL;
             return NS_OK;
     }
 }
 /* bool newResolve (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval id, out JSObjectPtr objp); */
 NS_IMETHODIMP
 nsXPCComponents_Results::NewResolve(nsIXPConnectWrappedNative *wrapper,
                                     JSContext *cx, JSObject *objArg,
                                     jsid idArg, JSObject * *objp,
                                     bool *_retval)
 {
     RootedObject obj(cx, objArg);
     RootedId id(cx, idArg);
     JSAutoByteString name;
     if (JSID_IS_STRING(id) && name.encodeLatin1(cx, JSID_TO_STRING(id))) {
         const char* rv_name;
         const void* iter = nullptr;
         nsresult rv;
         while (nsXPCException::IterateNSResults(&rv, &rv_name, nullptr, &iter)) {
             if (!strcmp(name.ptr(), rv_name)) {
                 jsval val = JS_NumberValue((double)rv);
                 *objp = obj;
                 if (!JS_DefinePropertyById(cx, obj, id, val,
                                            nullptr, nullptr,
                                            JSPROP_ENUMERATE |
                                            JSPROP_READONLY |
                                            JSPROP_PERMANENT)) {
                     return NS_ERROR_UNEXPECTED;
                 }
             }
         }
     }
     return NS_OK;
 }
 /***************************************************************************/
 // JavaScript Constructor for nsIJSID objects (Components.ID)
 class nsXPCComponents_ID :
   public nsIXPCComponents_ID,
   public nsIXPCScriptable,
   public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_ID
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_ID();
     virtual ~nsXPCComponents_ID();
 private:
     static nsresult CallOrConstruct(nsIXPConnectWrappedNative *wrapper,
                                     JSContext *cx, HandleObject obj,
                                     const CallArgs &args, bool *_retval);
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_ID)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetHelperForLanguage(uint32_t language,
                                          nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_ID";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetFlags(uint32_t *aFlags)
 {
     *aFlags = 0;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_ID::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_ID::nsXPCComponents_ID()
 {
 }
 nsXPCComponents_ID::~nsXPCComponents_ID()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_ID)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_ID)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_ID)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_ID)
 NS_IMPL_RELEASE(nsXPCComponents_ID)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_ID
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_ID"
 #define                             XPC_MAP_WANT_CALL
 #define                             XPC_MAP_WANT_CONSTRUCT
 #define                             XPC_MAP_WANT_HASINSTANCE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool call (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCComponents_ID::Call(nsIXPConnectWrappedNative *wrapper, JSContext *cx, JSObject *objArg,
                          const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 /* bool construct (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCComponents_ID::Construct(nsIXPConnectWrappedNative *wrapper, JSContext *cx, JSObject *objArg,
                               const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 // static
 nsresult
 nsXPCComponents_ID::CallOrConstruct(nsIXPConnectWrappedNative *wrapper,
                                     JSContext *cx, HandleObject obj,
                                     const CallArgs &args, bool *_retval)
 {
     // make sure we have at least one arg
     if (args.length() < 1)
         return ThrowAndFail(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx, _retval);
     // Do the security check if necessary
     nsIXPCSecurityManager* sm = nsXPConnect::XPConnect()->GetDefaultSecurityManager();
     if (sm && NS_FAILED(sm->CanCreateInstance(cx, nsJSID::GetCID()))) {
         // the security manager vetoed. It should have set an exception.
         *_retval = false;
         return NS_OK;
     }
     // convert the first argument into a string and see if it looks like an id
     JSString* jsstr;
     JSAutoByteString bytes;
     nsID id;
     if (!(jsstr = ToString(cx, args[0])) ||
         !bytes.encodeLatin1(cx, jsstr) ||
         !id.Parse(bytes.ptr())) {
         return ThrowAndFail(NS_ERROR_XPC_BAD_ID_STRING, cx, _retval);
     }
     // make the new object and return it.
     JSObject* newobj = xpc_NewIDObject(cx, obj, id);
     if (!newobj)
         return NS_ERROR_UNEXPECTED;
     args.rval().setObject(*newobj);
     return NS_OK;
 }
 /* bool hasInstance (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval val, out bool bp); */
 NS_IMETHODIMP
 nsXPCComponents_ID::HasInstance(nsIXPConnectWrappedNative *wrapper,
                                 JSContext *cx, JSObject *obj,
                                 HandleValue val, bool *bp, bool *_retval)
 {
     if (bp)
         *bp = JSValIsInterfaceOfType(cx, val, NS_GET_IID(nsIJSID));
     return NS_OK;
 }
 /***************************************************************************/
 // JavaScript Constructor for nsIXPCException objects (Components.Exception)
 class nsXPCComponents_Exception :
   public nsIXPCComponents_Exception,
   public nsIXPCScriptable,
   public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_EXCEPTION
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_Exception();
     virtual ~nsXPCComponents_Exception();
 private:
     static nsresult CallOrConstruct(nsIXPConnectWrappedNative *wrapper,
                                     JSContext *cx, HandleObject obj,
                                     const CallArgs &args, bool *_retval);
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_Exception)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetHelperForLanguage(uint32_t language,
                                                 nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_Exception";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetFlags(uint32_t *aFlags)
 {
     *aFlags = 0;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_Exception::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_Exception::nsXPCComponents_Exception()
 {
 }
 nsXPCComponents_Exception::~nsXPCComponents_Exception()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_Exception)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_Exception)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_Exception)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_Exception)
 NS_IMPL_RELEASE(nsXPCComponents_Exception)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_Exception
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_Exception"
 #define                             XPC_MAP_WANT_CALL
 #define                             XPC_MAP_WANT_CONSTRUCT
 #define                             XPC_MAP_WANT_HASINSTANCE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool call (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCComponents_Exception::Call(nsIXPConnectWrappedNative *wrapper, JSContext *cx, JSObject *objArg,
                                 const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 /* bool construct (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCComponents_Exception::Construct(nsIXPConnectWrappedNative *wrapper, JSContext *cx,
                                      JSObject *objArg, const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 struct MOZ_STACK_CLASS ExceptionArgParser
 {
     ExceptionArgParser(JSContext *context,
                        nsXPConnect *xpconnect)
         : eMsg("exception")
         , eResult(NS_ERROR_FAILURE)
         , cx(context)
         , xpc(xpconnect)
     {}
     // Public exception parameter values. During construction, these are
     // initialized to the appropriate defaults.
     const char*             eMsg;
     nsresult                eResult;
     nsCOMPtr<nsIStackFrame> eStack;
     nsCOMPtr<nsISupports>   eData;
     // Parse the constructor arguments into the above |eFoo| parameter values.
     bool parse(const CallArgs &args) {
         /*
          * The Components.Exception takes a series of arguments, all of them
          * optional:
          *
          * Argument 0: Exception message (defaults to 'exception').
          * Argument 1: Result code (defaults to NS_ERROR_FAILURE) _or_ options
          *             object (see below).
          * Argument 2: Stack (defaults to the current stack, which we trigger
          *                    by leaving this nullptr in the parser).
          * Argument 3: Optional user data (defaults to nullptr).
          *
          * To dig our way out of this clunky API, we now support passing an
          * options object as the second parameter (as opposed to a result code).
          * If this is the case, all subsequent arguments are ignored, and the
          * following properties are parsed out of the object (using the
          * associated default if the property does not exist):
          *
          *   result:    Result code (see argument 1).
          *   stack:     Call stack (see argument 2).
          *   data:      User data (see argument 3).
          */
         if (args.length() > 0 && !parseMessage(args[0]))
             return false;
         if (args.length() > 1) {
             if (args[1].isObject()) {
                 RootedObject obj(cx, &args[1].toObject());
                 return parseOptionsObject(obj);
             }
             if (!parseResult(args[1]))
                 return false;
         }
         if (args.length() > 2) {
             if (!parseStack(args[2]))
                 return false;
         }
         if (args.length() > 3) {
             if (!parseData(args[3]))
                 return false;
         }
         return true;
     }
   protected:
     /*
      * Parsing helpers.
      */
     bool parseMessage(HandleValue v) {
         JSString *str = ToString(cx, v);
         if (!str)
            return false;
         eMsg = messageBytes.encodeLatin1(cx, str);
         return !!eMsg;
     }
     bool parseResult(HandleValue v) {
         return JS::ToUint32(cx, v, (uint32_t*) &eResult);
     }
     bool parseStack(HandleValue v) {
         if (!v.isObject()) {
             // eStack has already been initialized to null, which is what we want
             // for any non-object values (including null).
             return true;
         }
         return NS_SUCCEEDED(xpc->WrapJS(cx, &v.toObject(),
                                         NS_GET_IID(nsIStackFrame),
                                         getter_AddRefs(eStack)));
     }
     bool parseData(HandleValue v) {
         if (!v.isObject()) {
             // eData has already been initialized to null, which is what we want
             // for any non-object values (including null).
             return true;
         }
         return NS_SUCCEEDED(xpc->WrapJS(cx, &v.toObject(),
                                         NS_GET_IID(nsISupports),
                                         getter_AddRefs(eData)));
     }
     bool parseOptionsObject(HandleObject obj) {
         RootedValue v(cx);
         if (!getOption(obj, "result", &v) ||
             (!v.isUndefined() && !parseResult(v)))
             return false;
         if (!getOption(obj, "stack", &v) ||
             (!v.isUndefined() && !parseStack(v)))
             return false;
         if (!getOption(obj, "data", &v) ||
             (!v.isUndefined() && !parseData(v)))
             return false;
         return true;
     }
     bool getOption(HandleObject obj, const char *name, MutableHandleValue rv) {
         // Look for the property.
         bool found;
         if (!JS_HasProperty(cx, obj, name, &found))
             return false;
         // If it wasn't found, indicate with undefined.
         if (!found) {
             rv.setUndefined();
             return true;
         }
         // Get the property.
         return JS_GetProperty(cx, obj, name, rv);
     }
     /*
      * Internal data members.
      */
     // If there's a non-default exception string, hold onto the allocated bytes.
     JSAutoByteString messageBytes;
     // Various bits and pieces that are helpful to have around.
     JSContext *cx;
     nsXPConnect *xpc;
 };
 // static
 nsresult
 nsXPCComponents_Exception::CallOrConstruct(nsIXPConnectWrappedNative *wrapper,
                                            JSContext *cx, HandleObject obj,
                                            const CallArgs &args, bool *_retval)
 {
     nsXPConnect* xpc = nsXPConnect::XPConnect();
     // Do the security check if necessary
     nsIXPCSecurityManager* sm = xpc->GetDefaultSecurityManager();
     if (sm && NS_FAILED(sm->CanCreateInstance(cx, Exception::GetCID()))) {
         // the security manager vetoed. It should have set an exception.
         *_retval = false;
         return NS_OK;
     }
     // Parse the arguments to the Exception constructor.
     ExceptionArgParser parser(cx, xpc);
     if (!parser.parse(args))
         return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
     nsCOMPtr<nsIException> e = new Exception(nsCString(parser.eMsg),
                                              parser.eResult,
                                              EmptyCString(),
                                              parser.eStack,
                                              parser.eData);
     nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
     RootedObject newObj(cx);
     if (NS_FAILED(xpc->WrapNative(cx, obj, e, NS_GET_IID(nsIXPCException),
                                   getter_AddRefs(holder))) || !holder ||
         // Assign, not compare
         !(newObj = holder->GetJSObject())) {
         return ThrowAndFail(NS_ERROR_XPC_CANT_CREATE_WN, cx, _retval);
     }
     args.rval().setObject(*newObj);
     return NS_OK;
 }
 /* bool hasInstance (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval val, out bool bp); */
 NS_IMETHODIMP
 nsXPCComponents_Exception::HasInstance(nsIXPConnectWrappedNative *wrapper,
                                        JSContext * cx, JSObject * obj,
                                        HandleValue val, bool *bp,
                                        bool *_retval)
 {
     using namespace mozilla::dom;
     RootedValue v(cx, val);
     if (bp) {
         Exception* e;
         *bp = NS_SUCCEEDED(UNWRAP_OBJECT(Exception, v.toObjectOrNull(), e)) ||
               JSValIsInterfaceOfType(cx, v, NS_GET_IID(nsIException));
     }
     return NS_OK;
 }
 /***************************************************************************/
 // This class is for the thing returned by "new Component.Constructor".
 // XXXjband we use this CID for security check, but security system can't see
 // it since it has no registed factory. Security really kicks in when we try
 // to build a wrapper around an instance.
 // {B4A95150-E25A-11d3-8F61-0010A4E73D9A}
 #define NS_XPCCONSTRUCTOR_CID                                                 \
 { 0xb4a95150, 0xe25a, 0x11d3,                                                 \
     { 0x8f, 0x61, 0x0, 0x10, 0xa4, 0xe7, 0x3d, 0x9a } }
 class nsXPCConstructor :
   public nsIXPCConstructor,
   public nsIXPCScriptable,
   public nsIClassInfo
 {
 public:
     NS_DEFINE_STATIC_CID_ACCESSOR(NS_XPCCONSTRUCTOR_CID)
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCONSTRUCTOR
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCConstructor(); // not implemented
     nsXPCConstructor(nsIJSCID* aClassID,
                      nsIJSIID* aInterfaceID,
                      const char* aInitializer);
     virtual ~nsXPCConstructor();
 private:
     nsresult CallOrConstruct(nsIXPConnectWrappedNative *wrapper,
                              JSContext *cx, HandleObject obj,
                              const CallArgs &args, bool *_retval);
 private:
     nsRefPtr<nsIJSCID> mClassID;
     nsRefPtr<nsIJSIID> mInterfaceID;
     char*              mInitializer;
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCConstructor::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCConstructor)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCConstructor::GetHelperForLanguage(uint32_t language,
                                        nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCConstructor::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCConstructor::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCConstructor";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCConstructor::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCConstructor::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCConstructor::GetFlags(uint32_t *aFlags)
 {
     *aFlags = 0;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCConstructor::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCConstructor::nsXPCConstructor(nsIJSCID* aClassID,
                                    nsIJSIID* aInterfaceID,
                                    const char* aInitializer)
     : mClassID(aClassID),
       mInterfaceID(aInterfaceID)
 {
     mInitializer = aInitializer ?
         (char*) nsMemory::Clone(aInitializer, strlen(aInitializer)+1) :
         nullptr;
 }
 nsXPCConstructor::~nsXPCConstructor()
 {
     if (mInitializer)
         nsMemory::Free(mInitializer);
 }
 /* readonly attribute nsIJSCID classID; */
 NS_IMETHODIMP
 nsXPCConstructor::GetClassID(nsIJSCID * *aClassID)
 {
     nsRefPtr<nsIJSCID> rval = mClassID;
     rval.forget(aClassID);
     return NS_OK;
 }
 /* readonly attribute nsIJSIID interfaceID; */
 NS_IMETHODIMP
 nsXPCConstructor::GetInterfaceID(nsIJSIID * *aInterfaceID)
 {
     nsRefPtr<nsIJSIID> rval = mInterfaceID;
     rval.forget(aInterfaceID);
     return NS_OK;
 }
 /* readonly attribute string initializer; */
 NS_IMETHODIMP
 nsXPCConstructor::GetInitializer(char * *aInitializer)
 {
     XPC_STRING_GETTER_BODY(aInitializer, mInitializer);
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCConstructor)
   NS_INTERFACE_MAP_ENTRY(nsIXPCConstructor)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCConstructor)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCConstructor)
 NS_IMPL_RELEASE(nsXPCConstructor)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCConstructor
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCConstructor"
 #define                             XPC_MAP_WANT_CALL
 #define                             XPC_MAP_WANT_CONSTRUCT
 #define XPC_MAP_FLAGS               0
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool call (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCConstructor::Call(nsIXPConnectWrappedNative *wrapper, JSContext *cx, JSObject *objArg,
                        const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 /* bool construct (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCConstructor::Construct(nsIXPConnectWrappedNative *wrapper, JSContext *cx, JSObject *objArg,
                             const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 // static
 nsresult
 nsXPCConstructor::CallOrConstruct(nsIXPConnectWrappedNative *wrapper,JSContext *cx,
                                   HandleObject obj, const CallArgs &args, bool *_retval)
 {
     nsXPConnect* xpc = nsXPConnect::XPConnect();
     // security check not required because we are going to call through the
     // code which is reflected into JS which will do that for us later.
     nsCOMPtr<nsIXPConnectJSObjectHolder> cidHolder;
     nsCOMPtr<nsIXPConnectJSObjectHolder> iidHolder;
     RootedObject cidObj(cx);
     RootedObject iidObj(cx);
     if (NS_FAILED(xpc->WrapNative(cx, obj, mClassID, NS_GET_IID(nsIJSCID),
                                   getter_AddRefs(cidHolder))) || !cidHolder ||
         // Assign, not compare
         !(cidObj = cidHolder->GetJSObject()) ||
         NS_FAILED(xpc->WrapNative(cx, obj, mInterfaceID, NS_GET_IID(nsIJSIID),
                                   getter_AddRefs(iidHolder))) || !iidHolder ||
         // Assign, not compare
         !(iidObj = iidHolder->GetJSObject())) {
         return ThrowAndFail(NS_ERROR_XPC_CANT_CREATE_WN, cx, _retval);
     }
     JS::Rooted<JS::Value> arg(cx, ObjectValue(*iidObj));
     RootedValue rval(cx);
     if (!JS_CallFunctionName(cx, cidObj, "createInstance", arg, &rval) ||
         rval.isPrimitive()) {
         // createInstance will have thrown an exception
         *_retval = false;
         return NS_OK;
     }
     args.rval().set(rval);
     // call initializer method if supplied
     if (mInitializer) {
         RootedObject newObj(cx, &rval.toObject());
         // first check existence of function property for better error reporting
         RootedValue fun(cx);
         if (!JS_GetProperty(cx, newObj, mInitializer, &fun) ||
             fun.isPrimitive()) {
             return ThrowAndFail(NS_ERROR_XPC_BAD_INITIALIZER_NAME, cx, _retval);
         }
         RootedValue dummy(cx);
         if (!JS_CallFunctionValue(cx, newObj, fun, args, &dummy)) {
             // function should have thrown an exception
             *_retval = false;
             return NS_OK;
         }
     }
     return NS_OK;
 }
 /*******************************************************/
 // JavaScript Constructor for nsIXPCConstructor objects (Components.Constructor)
 class nsXPCComponents_Constructor :
   public nsIXPCComponents_Constructor,
   public nsIXPCScriptable,
   public nsIClassInfo
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCCOMPONENTS_CONSTRUCTOR
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSICLASSINFO
 public:
     nsXPCComponents_Constructor();
     virtual ~nsXPCComponents_Constructor();
 private:
     static nsresult CallOrConstruct(nsIXPConnectWrappedNative *wrapper,
                                     JSContext *cx, HandleObject obj,
                                     const CallArgs &args, bool *_retval);
 };
 /***************************************************************************/
 /* void getInterfaces (out uint32_t count, [array, size_is (count), retval]
                        out nsIIDPtr array); */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetInterfaces(uint32_t *aCount, nsIID * **aArray)
 {
     const uint32_t count = 2;
     *aCount = count;
     nsIID **array;
     *aArray = array = static_cast<nsIID**>(nsMemory::Alloc(count * sizeof(nsIID*)));
     if (!array)
         return NS_ERROR_OUT_OF_MEMORY;
     uint32_t index = 0;
     nsIID* clone;
 #define PUSH_IID(id)                                                          \
     clone = static_cast<nsIID *>(nsMemory::Clone(&NS_GET_IID( id ),           \
                                                  sizeof(nsIID)));             \
     if (!clone)                                                               \
         goto oom;                                                             \
     array[index++] = clone;
     PUSH_IID(nsIXPCComponents_Constructor)
     PUSH_IID(nsIXPCScriptable)
 #undef PUSH_IID
     return NS_OK;
 oom:
     while (index)
         nsMemory::Free(array[--index]);
     nsMemory::Free(array);
     *aArray = nullptr;
     return NS_ERROR_OUT_OF_MEMORY;
 }
 /* nsISupports getHelperForLanguage (in uint32_t language); */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetHelperForLanguage(uint32_t language,
                                                   nsISupports **retval)
 {
     *retval = nullptr;
     return NS_OK;
 }
 /* readonly attribute string contractID; */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetContractID(char * *aContractID)
 {
     *aContractID = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 /* readonly attribute string classDescription; */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetClassDescription(char * *aClassDescription)
 {
     static const char classDescription[] = "XPCComponents_Constructor";
     *aClassDescription = (char*)nsMemory::Clone(classDescription, sizeof(classDescription));
     return *aClassDescription ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
 }
 /* readonly attribute nsCIDPtr classID; */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetClassID(nsCID * *aClassID)
 {
     *aClassID = nullptr;
     return NS_OK;
 }
 /* readonly attribute uint32_t implementationLanguage; */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetImplementationLanguage(uint32_t *aImplementationLanguage)
 {
     *aImplementationLanguage = nsIProgrammingLanguage::CPLUSPLUS;
     return NS_OK;
 }
 /* readonly attribute uint32_t flags; */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetFlags(uint32_t *aFlags)
 {
     *aFlags = 0;
     return NS_OK;
 }
 /* [notxpcom] readonly attribute nsCID classIDNoAlloc; */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::GetClassIDNoAlloc(nsCID *aClassIDNoAlloc)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 nsXPCComponents_Constructor::nsXPCComponents_Constructor()
 {
 }
 nsXPCComponents_Constructor::~nsXPCComponents_Constructor()
 {
     // empty
 }
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_Constructor)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_Constructor)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsIClassInfo)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_Constructor)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_Constructor)
 NS_IMPL_RELEASE(nsXPCComponents_Constructor)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_Constructor
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_Constructor"
 #define                             XPC_MAP_WANT_CALL
 #define                             XPC_MAP_WANT_CONSTRUCT
 #define                             XPC_MAP_WANT_HASINSTANCE
 #define XPC_MAP_FLAGS               nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 /* bool call (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::Call(nsIXPConnectWrappedNative *wrapper, JSContext *cx,
                                   JSObject *objArg, const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 /* bool construct (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in uint32_t argc, in JSValPtr argv, in JSValPtr vp); */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::Construct(nsIXPConnectWrappedNative *wrapper, JSContext *cx,
                                        JSObject *objArg, const CallArgs &args, bool *_retval)
 {
     RootedObject obj(cx, objArg);
     return CallOrConstruct(wrapper, cx, obj, args, _retval);
 }
 // static
 nsresult
 nsXPCComponents_Constructor::CallOrConstruct(nsIXPConnectWrappedNative *wrapper,
                                              JSContext *cx, HandleObject obj,
                                              const CallArgs &args, bool *_retval)
 {
     // make sure we have at least one arg
     if (args.length() < 1)
         return ThrowAndFail(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx, _retval);
     // get the various other object pointers we need
     nsXPConnect* xpc = nsXPConnect::XPConnect();
     XPCWrappedNativeScope* scope = GetObjectScope(obj);
     nsCOMPtr<nsIXPCComponents> comp;
     if (!xpc || !scope || !(comp = do_QueryInterface(scope->GetComponents())))
         return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
     // Do the security check if necessary
     nsIXPCSecurityManager* sm = xpc->GetDefaultSecurityManager();
     if (sm && NS_FAILED(sm->CanCreateInstance(cx, nsXPCConstructor::GetCID()))) {
         // the security manager vetoed. It should have set an exception.
         *_retval = false;
         return NS_OK;
     }
     // initialization params for the Constructor object we will create
     nsCOMPtr<nsIJSCID> cClassID;
     nsCOMPtr<nsIJSIID> cInterfaceID;
     const char*        cInitializer = nullptr;
     JSAutoByteString  cInitializerBytes;
     if (args.length() >= 3) {
         // args[2] is an initializer function or property name
         RootedString str(cx, ToString(cx, args[2]));
         if (!str || !(cInitializer = cInitializerBytes.encodeLatin1(cx, str)))
             return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
     }
     if (args.length() >= 2) {
         // args[1] is an iid name string
         // XXXjband support passing "Components.interfaces.foo"?
         nsCOMPtr<nsIXPCComponents_Interfaces> ifaces;
         nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
         RootedObject ifacesObj(cx);
         // we do the lookup by asking the Components.interfaces object
         // for the property with this name - i.e. we let its caching of these
         // nsIJSIID objects work for us.
         if (NS_FAILED(comp->GetInterfaces(getter_AddRefs(ifaces))) ||
             NS_FAILED(xpc->WrapNative(cx, obj, ifaces,
                                       NS_GET_IID(nsIXPCComponents_Interfaces),
                                       getter_AddRefs(holder))) || !holder ||
             // Assign, not compare
             !(ifacesObj = holder->GetJSObject())) {
             return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
         }
         RootedString str(cx, ToString(cx, args[1]));
         RootedId id(cx);
         if (!str || !JS_StringToId(cx, str, &id))
             return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
         RootedValue val(cx);
         if (!JS_GetPropertyById(cx, ifacesObj, id, &val) || val.isPrimitive())
             return ThrowAndFail(NS_ERROR_XPC_BAD_IID, cx, _retval);
         nsCOMPtr<nsIXPConnectWrappedNative> wn;
         if (NS_FAILED(xpc->GetWrappedNativeOfJSObject(cx, &val.toObject(),
                                                       getter_AddRefs(wn))) || !wn ||
             !(cInterfaceID = do_QueryWrappedNative(wn))) {
             return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
         }
     } else {
         nsCOMPtr<nsIInterfaceInfo> info;
         xpc->GetInfoForIID(&NS_GET_IID(nsISupports), getter_AddRefs(info));
         if (info) {
             cInterfaceID = nsJSIID::NewID(info);
         }
         if (!cInterfaceID)
             return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
     }
     // a new scope to avoid warnings about shadowed names
     {
         // argv[0] is a contractid name string
         // XXXjband support passing "Components.classes.foo"?
         // we do the lookup by asking the Components.classes object
         // for the property with this name - i.e. we let its caching of these
         // nsIJSCID objects work for us.
         nsCOMPtr<nsIXPCComponents_Classes> classes;
         nsCOMPtr<nsIXPConnectJSObjectHolder> holder;
         RootedObject classesObj(cx);
         if (NS_FAILED(comp->GetClasses(getter_AddRefs(classes))) ||
             NS_FAILED(xpc->WrapNative(cx, obj, classes,
                                       NS_GET_IID(nsIXPCComponents_Classes),
                                       getter_AddRefs(holder))) || !holder ||
             // Assign, not compare
             !(classesObj = holder->GetJSObject())) {
             return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
         }
         RootedString str(cx, ToString(cx, args[0]));
         RootedId id(cx);
         if (!str || !JS_StringToId(cx, str, &id))
             return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval);
         RootedValue val(cx);
         if (!JS_GetPropertyById(cx, classesObj, id, &val) || val.isPrimitive())
             return ThrowAndFail(NS_ERROR_XPC_BAD_CID, cx, _retval);
         nsCOMPtr<nsIXPConnectWrappedNative> wn;
         if (NS_FAILED(xpc->GetWrappedNativeOfJSObject(cx, JSVAL_TO_OBJECT(val),
                                                       getter_AddRefs(wn))) || !wn ||
             !(cClassID = do_QueryWrappedNative(wn))) {
             return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval);
         }
     }
     nsCOMPtr<nsIXPCConstructor> ctor = new nsXPCConstructor(cClassID, cInterfaceID, cInitializer);
     nsCOMPtr<nsIXPConnectJSObjectHolder> holder2;
     RootedObject newObj(cx);
     if (NS_FAILED(xpc->WrapNative(cx, obj, ctor, NS_GET_IID(nsIXPCConstructor),
                                   getter_AddRefs(holder2))) || !holder2 ||
         // Assign, not compare
         !(newObj = holder2->GetJSObject())) {
         return ThrowAndFail(NS_ERROR_XPC_CANT_CREATE_WN, cx, _retval);
     }
     args.rval().setObject(*newObj);
     return NS_OK;
 }
 /* bool hasInstance (in nsIXPConnectWrappedNative wrapper, in JSContextPtr cx, in JSObjectPtr obj, in jsval val, out bool bp); */
 NS_IMETHODIMP
 nsXPCComponents_Constructor::HasInstance(nsIXPConnectWrappedNative *wrapper,
                                          JSContext * cx, JSObject * obj,
                                          HandleValue val, bool *bp,
                                          bool *_retval)
 {
     if (bp)
         *bp = JSValIsInterfaceOfType(cx, val, NS_GET_IID(nsIXPCConstructor));
     return NS_OK;
 }
 class nsXPCComponents_Utils :
             public nsIXPCComponents_Utils,
             public nsIXPCScriptable
 {
 public:
     // all the interface method declarations...
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCSCRIPTABLE
     NS_DECL_NSIXPCCOMPONENTS_UTILS
 public:
     nsXPCComponents_Utils() { }
     virtual ~nsXPCComponents_Utils() { }
 private:
     nsCOMPtr<nsIXPCComponents_utils_Sandbox> mSandbox;
 };
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents_Utils)
   NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_Utils)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_Utils)
 NS_INTERFACE_MAP_END
 NS_IMPL_ADDREF(nsXPCComponents_Utils)
 NS_IMPL_RELEASE(nsXPCComponents_Utils)
 // The nsIXPCScriptable map declaration that will generate stubs for us...
 #define XPC_MAP_CLASSNAME           nsXPCComponents_Utils
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents_Utils"
 #define XPC_MAP_FLAGS               nsIXPCScriptable::ALLOW_PROP_MODS_DURING_RESOLVE
 #include "xpc_map_end.h" /* This will #undef the above */
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetSandbox(nsIXPCComponents_utils_Sandbox **aSandbox)
 {
     NS_ENSURE_ARG_POINTER(aSandbox);
     if (!mSandbox)
         mSandbox = NewSandboxConstructor();
     nsCOMPtr<nsIXPCComponents_utils_Sandbox> rval = mSandbox;
     rval.forget(aSandbox);
     return NS_OK;
 }
 /* void reportError (); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::ReportError(HandleValue error, JSContext *cx)
 {
     // This function shall never fail! Silently eat any failure conditions.
     nsCOMPtr<nsIConsoleService> console(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
     nsCOMPtr<nsIScriptError> scripterr(do_CreateInstance(NS_SCRIPTERROR_CONTRACTID));
     if (!scripterr || !console)
         return NS_OK;
     const uint64_t innerWindowID = nsJSUtils::GetCurrentlyRunningCodeInnerWindowID(cx);
     RootedObject errorObj(cx, error.isObject() ? &error.toObject() : nullptr);
     JSErrorReport *err = errorObj ? JS_ErrorFromException(cx, errorObj) : nullptr;
     if (err) {
         // It's a proper JS Error
         nsAutoString fileUni;
         CopyUTF8toUTF16(err->filename, fileUni);
         uint32_t column = err->uctokenptr - err->uclinebuf;
         const char16_t* ucmessage =
             static_cast<const char16_t*>(err->ucmessage);
         const char16_t* uclinebuf =
             static_cast<const char16_t*>(err->uclinebuf);
         nsresult rv = scripterr->InitWithWindowID(
                 ucmessage ? nsDependentString(ucmessage) : EmptyString(),
                 fileUni,
                 uclinebuf ? nsDependentString(uclinebuf) : EmptyString(),
                 err->lineno,
                 column, err->flags, "XPConnect JavaScript", innerWindowID);
         NS_ENSURE_SUCCESS(rv, NS_OK);
         console->LogMessage(scripterr);
         return NS_OK;
     }
     // It's not a JS Error object, so we synthesize as best we're able.
     RootedString msgstr(cx, ToString(cx, error));
     if (!msgstr)
         return NS_OK;
     nsCOMPtr<nsIStackFrame> frame;
     nsXPConnect *xpc = nsXPConnect::XPConnect();
     xpc->GetCurrentJSStack(getter_AddRefs(frame));
     nsString fileName;
     int32_t lineNo = 0;
     if (frame) {
         frame->GetFilename(fileName);
         frame->GetLineNumber(&lineNo);
     }
     const jschar *msgchars = JS_GetStringCharsZ(cx, msgstr);
     if (!msgchars)
         return NS_OK;
     nsresult rv = scripterr->InitWithWindowID(
             nsDependentString(static_cast<const char16_t *>(msgchars)),
             fileName, EmptyString(), lineNo, 0, 0,
             "XPConnect JavaScript", innerWindowID);
     NS_ENSURE_SUCCESS(rv, NS_OK);
     console->LogMessage(scripterr);
     return NS_OK;
 }
 /* void evalInSandbox(in AString source, in nativeobj sandbox); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::EvalInSandbox(const nsAString& source,
                                      HandleValue sandboxVal,
                                      HandleValue version,
                                      const nsACString& filenameArg,
                                      int32_t lineNumber,
                                      JSContext *cx,
                                      uint8_t optionalArgc,
                                      MutableHandleValue retval)
 {
     RootedObject sandbox(cx);
     if (!JS_ValueToObject(cx, sandboxVal, &sandbox) || !sandbox)
         return NS_ERROR_INVALID_ARG;
     // Optional third argument: JS version, as a string.
     JSVersion jsVersion = JSVERSION_DEFAULT;
     if (optionalArgc >= 1) {
         JSString *jsVersionStr = ToString(cx, version);
         if (!jsVersionStr)
             return NS_ERROR_INVALID_ARG;
         JSAutoByteString bytes(cx, jsVersionStr);
         if (!bytes)
             return NS_ERROR_INVALID_ARG;
         jsVersion = JS_StringToVersion(bytes.ptr());
         // Explicitly check for "latest", which we support for sandboxes but
         // isn't in the set of web-exposed version strings.
         if (jsVersion == JSVERSION_UNKNOWN &&
             !strcmp(bytes.ptr(), "latest"))
         {
             jsVersion = JSVERSION_LATEST;
         }
         if (jsVersion == JSVERSION_UNKNOWN)
             return NS_ERROR_INVALID_ARG;
     }
     // Optional fourth and fifth arguments: filename and line number.
     int32_t lineNo = (optionalArgc >= 3) ? lineNumber : 1;
     nsCString filename;
     if (!filenameArg.IsVoid()) {
         filename.Assign(filenameArg);
     } else {
         // Get the current source info from xpc.
         nsresult rv;
         nsCOMPtr<nsIXPConnect> xpc = do_GetService(nsIXPConnect::GetCID(), &rv);
         NS_ENSURE_SUCCESS(rv, rv);
         nsCOMPtr<nsIStackFrame> frame;
         xpc->GetCurrentJSStack(getter_AddRefs(frame));
         if (frame) {
             nsString frameFile;
             frame->GetFilename(frameFile);
             CopyUTF16toUTF8(frameFile, filename);
             frame->GetLineNumber(&lineNo);
         }
     }
     return xpc::EvalInSandbox(cx, sandbox, source, filename, lineNo,
                               jsVersion, false, retval);
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetSandboxMetadata(HandleValue sandboxVal,
                                           JSContext *cx, MutableHandleValue rval)
 {
     if (!sandboxVal.isObject())
         return NS_ERROR_INVALID_ARG;
     RootedObject sandbox(cx, &sandboxVal.toObject());
     sandbox = js::CheckedUnwrap(sandbox);
     if (!sandbox || !xpc::IsSandbox(sandbox))
         return NS_ERROR_INVALID_ARG;
     return xpc::GetSandboxMetadata(cx, sandbox, rval);
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::SetSandboxMetadata(HandleValue sandboxVal,
                                           HandleValue metadataVal,
                                           JSContext *cx)
 {
     if (!sandboxVal.isObject())
         return NS_ERROR_INVALID_ARG;
     RootedObject sandbox(cx, &sandboxVal.toObject());
     sandbox = js::CheckedUnwrap(sandbox);
     if (!sandbox || !xpc::IsSandbox(sandbox))
         return NS_ERROR_INVALID_ARG;
     nsresult rv = xpc::SetSandboxMetadata(cx, sandbox, metadataVal);
     NS_ENSURE_SUCCESS(rv, rv);
     return NS_OK;
 }
 /* JSObject import (in AUTF8String registryLocation,
  *                  [optional] in JSObject targetObj);
  */
 NS_IMETHODIMP
 nsXPCComponents_Utils::Import(const nsACString& registryLocation,
                               HandleValue targetObj,
                               JSContext* cx,
                               uint8_t optionalArgc,
                               MutableHandleValue retval)
 {
     nsCOMPtr<xpcIJSModuleLoader> moduleloader =
         do_GetService(MOZJSCOMPONENTLOADER_CONTRACTID);
     if (!moduleloader)
         return NS_ERROR_FAILURE;
     return moduleloader->Import(registryLocation, targetObj, cx, optionalArgc, retval);
 }
 /* unload (in AUTF8String registryLocation);
  */
 NS_IMETHODIMP
 nsXPCComponents_Utils::Unload(const nsACString & registryLocation)
 {
     nsCOMPtr<xpcIJSModuleLoader> moduleloader =
         do_GetService(MOZJSCOMPONENTLOADER_CONTRACTID);
     if (!moduleloader)
         return NS_ERROR_FAILURE;
     return moduleloader->Unload(registryLocation);
 }
 /*
  * JSObject importGlobalProperties (in jsval aPropertyList);
  */
 NS_IMETHODIMP
 nsXPCComponents_Utils::ImportGlobalProperties(HandleValue aPropertyList,
                                               JSContext* cx)
 {
     RootedObject global(cx, CurrentGlobalOrNull(cx));
     MOZ_ASSERT(global);
     GlobalProperties options(false);
     NS_ENSURE_TRUE(aPropertyList.isObject(), NS_ERROR_INVALID_ARG);
     RootedObject propertyList(cx, &aPropertyList.toObject());
     NS_ENSURE_TRUE(JS_IsArrayObject(cx, propertyList), NS_ERROR_INVALID_ARG);
     if (!options.Parse(cx, propertyList) ||
         !options.Define(cx, global))
     {
         return NS_ERROR_FAILURE;
     }
     return NS_OK;
 }
 /* xpcIJSWeakReference getWeakReference (); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetWeakReference(HandleValue object, JSContext *cx,
                                         xpcIJSWeakReference **_retval)
 {
     nsRefPtr<xpcJSWeakReference> ref = new xpcJSWeakReference();
     nsresult rv = ref->Init(cx, object);
     NS_ENSURE_SUCCESS(rv, rv);
     ref.forget(_retval);
     return NS_OK;
 }
 /* void forceGC (); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::ForceGC()
 {
     JSRuntime* rt = nsXPConnect::GetRuntimeInstance()->Runtime();
     PrepareForFullGC(rt);
     GCForReason(rt, gcreason::COMPONENT_UTILS);
     return NS_OK;
 }
 /* void forceCC (); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::ForceCC()
 {
     nsJSContext::CycleCollectNow();
     return NS_OK;
 }
 /* void forceShrinkingGC (); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::ForceShrinkingGC()
 {
     JSRuntime* rt = nsXPConnect::GetRuntimeInstance()->Runtime();
     PrepareForFullGC(rt);
     ShrinkingGC(rt, gcreason::COMPONENT_UTILS);
     return NS_OK;
 }
 class PreciseGCRunnable : public nsRunnable
 {
   public:
     PreciseGCRunnable(ScheduledGCCallback* aCallback, bool aShrinking)
     : mCallback(aCallback), mShrinking(aShrinking) {}
     NS_IMETHOD Run()
     {
         JSRuntime* rt = nsXPConnect::GetRuntimeInstance()->Runtime();
         JSContext *cx;
         JSContext *iter = nullptr;
         while ((cx = JS_ContextIterator(rt, &iter)) != nullptr) {
             if (JS_IsRunning(cx)) {
                 return NS_DispatchToMainThread(this);
             }
         }
         PrepareForFullGC(rt);
         if (mShrinking)
             ShrinkingGC(rt, gcreason::COMPONENT_UTILS);
         else
             GCForReason(rt, gcreason::COMPONENT_UTILS);
         mCallback->Callback();
         return NS_OK;
     }
   private:
     nsRefPtr<ScheduledGCCallback> mCallback;
     bool mShrinking;
 };
 /* void schedulePreciseGC(in ScheduledGCCallback callback); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::SchedulePreciseGC(ScheduledGCCallback* aCallback)
 {
     nsRefPtr<PreciseGCRunnable> event = new PreciseGCRunnable(aCallback, false);
     return NS_DispatchToMainThread(event);
 }
 /* void schedulePreciseShrinkingGC(in ScheduledGCCallback callback); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::SchedulePreciseShrinkingGC(ScheduledGCCallback* aCallback)
 {
     nsRefPtr<PreciseGCRunnable> event = new PreciseGCRunnable(aCallback, true);
     return NS_DispatchToMainThread(event);
 }
 /* void unlinkGhostWindows(); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::UnlinkGhostWindows()
 {
 #ifdef DEBUG
     nsWindowMemoryReporter::UnlinkGhostWindows();
     return NS_OK;
 #else
     return NS_ERROR_NOT_IMPLEMENTED;
 #endif
 }
 /* [implicit_jscontext] jsval nondeterministicGetWeakMapKeys(in jsval aMap); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::NondeterministicGetWeakMapKeys(HandleValue aMap,
                                                       JSContext *aCx,
                                                       MutableHandleValue aKeys)
 {
     if (!aMap.isObject()) {
         aKeys.setUndefined();
         return NS_OK;
     }
     RootedObject objRet(aCx);
     RootedObject mapObj(aCx, &aMap.toObject());
     if (!JS_NondeterministicGetWeakMapKeys(aCx, mapObj, &objRet))
         return NS_ERROR_OUT_OF_MEMORY;
      aKeys.set(objRet ? ObjectValue(*objRet) : UndefinedValue());
     return NS_OK;
 }
 /* void getDebugObject(); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetJSTestingFunctions(JSContext *cx,
                                              MutableHandleValue retval)
 {
     JSObject *obj = js::GetTestingFunctions(cx);
     if (!obj)
         return NS_ERROR_XPC_JAVASCRIPT_ERROR;
     retval.setObject(*obj);
     return NS_OK;
 }
 /* void getGlobalForObject(); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetGlobalForObject(HandleValue object,
                                           JSContext *cx,
                                           MutableHandleValue retval)
 {
     // First argument must be an object.
     if (object.isPrimitive())
         return NS_ERROR_XPC_BAD_CONVERT_JS;
     // Wrappers are parented to their the global in their home compartment. But
     // when getting the global for a cross-compartment wrapper, we really want
     // a wrapper for the foreign global. So we need to unwrap before getting the
     // parent, enter the compartment for the duration of the call, and wrap the
     // result.
     Rooted<JSObject*> obj(cx, &object.toObject());
     obj = js::UncheckedUnwrap(obj);
     {
         JSAutoCompartment ac(cx, obj);
         obj = JS_GetGlobalForObject(cx, obj);
     }
     if (!JS_WrapObject(cx, &obj))
         return NS_ERROR_FAILURE;
     // Outerize if necessary.
     if (JSObjectOp outerize = js::GetObjectClass(obj)->ext.outerObject)
       obj = outerize(cx, obj);
     retval.setObject(*obj);
     return NS_OK;
 }
 /* jsval createObjectIn(in jsval vobj); */
 bool
 xpc::CreateObjectIn(JSContext *cx, HandleValue vobj, CreateObjectInOptions &options,
                     MutableHandleValue rval)
 {
     if (!vobj.isObject()) {
         JS_ReportError(cx, "Expected an object as the target scope");
         return false;
     }
     RootedObject scope(cx, js::CheckedUnwrap(&vobj.toObject()));
     if (!scope) {
         JS_ReportError(cx, "Permission denied to create object in the target scope");
         return false;
     }
     bool define = !JSID_IS_VOID(options.defineAs);
     if (define && js::IsScriptedProxy(scope)) {
         JS_ReportError(cx, "Defining property on proxy object is not allowed");
         return false;
     }
     RootedObject obj(cx);
     {
         JSAutoCompartment ac(cx, scope);
         obj = JS_NewObject(cx, nullptr, JS::NullPtr(), scope);
         if (!obj)
             return false;
         if (define) {
             if (!JS_DefinePropertyById(cx, scope, options.defineAs, ObjectValue(*obj),
                                        JS_PropertyStub, JS_StrictPropertyStub,
                                        JSPROP_ENUMERATE))
                 return false;
         }
     }
     rval.setObject(*obj);
     if (!WrapperFactory::WaiveXrayAndWrap(cx, rval))
         return false;
     return true;
 }
 /* boolean isProxy(in value vobj); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::IsProxy(HandleValue vobj, JSContext *cx, bool *rval)
 {
     if (!vobj.isObject()) {
         *rval = false;
         return NS_OK;
     }
     RootedObject obj(cx, &vobj.toObject());
     obj = js::CheckedUnwrap(obj, /* stopAtOuter = */ false);
     NS_ENSURE_TRUE(obj, NS_ERROR_FAILURE);
     *rval = js::IsScriptedProxy(obj);
     return NS_OK;
 }
 /* jsval evalInWindow(in string source, in jsval window); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::EvalInWindow(const nsAString &source, HandleValue window,
                                     JSContext *cx, MutableHandleValue rval)
 {
     if (!window.isObject())
         return NS_ERROR_INVALID_ARG;
     RootedObject rwindow(cx, &window.toObject());
     if (!xpc::EvalInWindow(cx, source, rwindow, rval))
         return NS_ERROR_FAILURE;
     return NS_OK;
 }
 /* jsval exportFunction(in jsval vfunction, in jsval vscope, in jsval voptions); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::ExportFunction(HandleValue vfunction, HandleValue vscope,
                                       HandleValue voptions, JSContext *cx,
                                       MutableHandleValue rval)
 {
     if (!xpc::ExportFunction(cx, vfunction, vscope, voptions, rval))
         return NS_ERROR_FAILURE;
     return NS_OK;
 }
 /* jsval createObjectIn(in jsval vobj, [optional] in jsval voptions); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::CreateObjectIn(HandleValue vobj, HandleValue voptions,
                                       JSContext *cx, MutableHandleValue rval)
 {
     RootedObject optionsObject(cx, voptions.isObject() ? &voptions.toObject()
                                                        : nullptr);
     CreateObjectInOptions options(cx, optionsObject);
     if (voptions.isObject() &&
         !options.Parse())
     {
         return NS_ERROR_FAILURE;
     }
     if (!xpc::CreateObjectIn(cx, vobj, options, rval))
         return NS_ERROR_FAILURE;
     return NS_OK;
 }
 /* void makeObjectPropsNormal(jsval vobj); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::MakeObjectPropsNormal(HandleValue vobj, JSContext *cx)
 {
     if (!cx)
         return NS_ERROR_FAILURE;
     // first argument must be an object
     if (vobj.isPrimitive())
         return NS_ERROR_XPC_BAD_CONVERT_JS;
     RootedObject obj(cx, js::UncheckedUnwrap(&vobj.toObject()));
     JSAutoCompartment ac(cx, obj);
     AutoIdArray ida(cx, JS_Enumerate(cx, obj));
     if (!ida)
         return NS_ERROR_FAILURE;
     RootedId id(cx);
     RootedValue v(cx);
     for (size_t i = 0; i < ida.length(); ++i) {
         id = ida[i];
         if (!JS_GetPropertyById(cx, obj, id, &v))
             return NS_ERROR_FAILURE;
         if (v.isPrimitive())
             continue;
         RootedObject propobj(cx, &v.toObject());
         // TODO Deal with non-functions.
         if (!js::IsWrapper(propobj) || !JS_ObjectIsCallable(cx, propobj))
             continue;
         if (!NewFunctionForwarder(cx, id, propobj, /* doclone = */ false, &v) ||
             !JS_SetPropertyById(cx, obj, id, v))
             return NS_ERROR_FAILURE;
     }
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::IsDeadWrapper(HandleValue obj, bool *out)
 {
     *out = false;
     if (obj.isPrimitive())
         return NS_ERROR_INVALID_ARG;
     // Make sure to unwrap first. Once a proxy is nuked, it ceases to be a
     // wrapper, meaning that, if passed to another compartment, we'll generate
     // a CCW for it. Make sure that IsDeadWrapper sees through the confusion.
     *out = JS_IsDeadWrapper(js::CheckedUnwrap(&obj.toObject()));
     return NS_OK;
 }
 /* void recomputerWrappers(jsval vobj); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::RecomputeWrappers(HandleValue vobj, JSContext *cx)
 {
     // Determine the compartment of the given object, if any.
     JSCompartment *c = vobj.isObject()
                        ? js::GetObjectCompartment(js::UncheckedUnwrap(&vobj.toObject()))
                        : nullptr;
     // If no compartment was given, recompute all.
     if (!c)
         js::RecomputeWrappers(cx, js::AllCompartments(), js::AllCompartments());
     // Otherwise, recompute wrappers for the given compartment.
     else
         js::RecomputeWrappers(cx, js::SingleCompartment(c), js::AllCompartments()) &&
         js::RecomputeWrappers(cx, js::AllCompartments(), js::SingleCompartment(c));
     return NS_OK;
 }
 /* jsval setWantXrays(jsval vscope); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::SetWantXrays(HandleValue vscope, JSContext *cx)
 {
     if (!vscope.isObject())
         return NS_ERROR_INVALID_ARG;
     JSObject *scopeObj = js::UncheckedUnwrap(&vscope.toObject());
     JSCompartment *compartment = js::GetObjectCompartment(scopeObj);
     EnsureCompartmentPrivate(scopeObj)->wantXrays = true;
     bool ok = js::RecomputeWrappers(cx, js::SingleCompartment(compartment),
                                     js::AllCompartments());
     NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);
     return NS_OK;
 }
 /* jsval forcePrivilegedComponentsForScope(jsval vscope); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::ForcePrivilegedComponentsForScope(HandleValue vscope,
                                                          JSContext *cx)
 {
     if (!vscope.isObject())
         return NS_ERROR_INVALID_ARG;
     JSObject *scopeObj = js::UncheckedUnwrap(&vscope.toObject());
     XPCWrappedNativeScope *scope = GetObjectScope(scopeObj);
     scope->ForcePrivilegedComponents();
     return NS_OK;
 }
 /* jsval getComponentsForScope(jsval vscope); */
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetComponentsForScope(HandleValue vscope, JSContext *cx,
                                              MutableHandleValue rval)
 {
     if (!vscope.isObject())
         return NS_ERROR_INVALID_ARG;
     JSObject *scopeObj = js::UncheckedUnwrap(&vscope.toObject());
     XPCWrappedNativeScope *scope = GetObjectScope(scopeObj);
     RootedObject components(cx);
     if (!scope->GetComponentsJSObject(&components))
         return NS_ERROR_FAILURE;
     if (!JS_WrapObject(cx, &components))
         return NS_ERROR_FAILURE;
     rval.setObject(*components);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::Dispatch(HandleValue runnableArg, HandleValue scope,
                                 JSContext *cx)
 {
     RootedValue runnable(cx, runnableArg);
     // Enter the given compartment, if any, and rewrap runnable.
     Maybe<JSAutoCompartment> ac;
     if (scope.isObject()) {
         JSObject *scopeObj = js::UncheckedUnwrap(&scope.toObject());
         if (!scopeObj)
             return NS_ERROR_FAILURE;
         ac.construct(cx, scopeObj);
         if (!JS_WrapValue(cx, &runnable))
             return NS_ERROR_FAILURE;
     }
     // Get an XPCWrappedJS for |runnable|.
     if (!runnable.isObject())
         return NS_ERROR_INVALID_ARG;
     nsCOMPtr<nsIRunnable> run;
     nsresult rv = nsXPConnect::XPConnect()->WrapJS(cx, &runnable.toObject(),
                                                    NS_GET_IID(nsIRunnable),
                                                    getter_AddRefs(run));
     NS_ENSURE_SUCCESS(rv, rv);
     MOZ_ASSERT(run);
     // Dispatch.
     return NS_DispatchToMainThread(run);
 }
 #define GENERATE_JSCONTEXTOPTION_GETTER_SETTER(_attr, _getter, _setter) \
     NS_IMETHODIMP                                                       \
     nsXPCComponents_Utils::Get## _attr(JSContext* cx, bool* aValue)     \
     {                                                                   \
         *aValue = ContextOptionsRef(cx)._getter();                      \
         return NS_OK;                                                   \
     }                                                                   \
     NS_IMETHODIMP                                                       \
     nsXPCComponents_Utils::Set## _attr(JSContext* cx, bool aValue)      \
     {                                                                   \
         ContextOptionsRef(cx)._setter(aValue);                          \
         return NS_OK;                                                   \
     }
 #define GENERATE_JSRUNTIMEOPTION_GETTER_SETTER(_attr, _getter, _setter) \
     NS_IMETHODIMP                                                       \
     nsXPCComponents_Utils::Get## _attr(JSContext* cx, bool* aValue)     \
     {                                                                   \
         *aValue = RuntimeOptionsRef(cx)._getter();                      \
         return NS_OK;                                                   \
     }                                                                   \
     NS_IMETHODIMP                                                       \
     nsXPCComponents_Utils::Set## _attr(JSContext* cx, bool aValue)      \
     {                                                                   \
         RuntimeOptionsRef(cx)._setter(aValue);                          \
         return NS_OK;                                                   \
     }
 GENERATE_JSCONTEXTOPTION_GETTER_SETTER(Strict, extraWarnings, setExtraWarnings)
 GENERATE_JSCONTEXTOPTION_GETTER_SETTER(Werror, werror, setWerror)
 GENERATE_JSCONTEXTOPTION_GETTER_SETTER(Strict_mode, strictMode, setStrictMode)
 GENERATE_JSRUNTIMEOPTION_GETTER_SETTER(Ion, ion, setIon)
 #undef GENERATE_JSCONTEXTOPTION_GETTER_SETTER
 #undef GENERATE_JSRUNTIMEOPTION_GETTER_SETTER
 NS_IMETHODIMP
 nsXPCComponents_Utils::SetGCZeal(int32_t aValue, JSContext* cx)
 {
 #ifdef JS_GC_ZEAL
     JS_SetGCZeal(cx, uint8_t(aValue), JS_DEFAULT_ZEAL_FREQ);
 #endif
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::NukeSandbox(HandleValue obj, JSContext *cx)
 {
     NS_ENSURE_TRUE(obj.isObject(), NS_ERROR_INVALID_ARG);
     JSObject *wrapper = &obj.toObject();
     NS_ENSURE_TRUE(IsWrapper(wrapper), NS_ERROR_INVALID_ARG);
     JSObject *sb = UncheckedUnwrap(wrapper);
     NS_ENSURE_TRUE(IsSandbox(sb), NS_ERROR_INVALID_ARG);
     NukeCrossCompartmentWrappers(cx, AllCompartments(),
                                  SingleCompartment(GetObjectCompartment(sb)),
                                  NukeWindowReferences);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::BlockScriptForGlobal(HandleValue globalArg,
                                             JSContext *cx)
 {
     NS_ENSURE_TRUE(globalArg.isObject(), NS_ERROR_INVALID_ARG);
     RootedObject global(cx, UncheckedUnwrap(&globalArg.toObject(),
                                             /* stopAtOuter = */ false));
     NS_ENSURE_TRUE(JS_IsGlobalObject(global), NS_ERROR_INVALID_ARG);
     if (nsContentUtils::IsSystemPrincipal(xpc::GetObjectPrincipal(global))) {
         JS_ReportError(cx, "Script may not be disabled for system globals");
         return NS_ERROR_FAILURE;
     }
     Scriptability::Get(global).Block();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::UnblockScriptForGlobal(HandleValue globalArg,
                                               JSContext *cx)
 {
     NS_ENSURE_TRUE(globalArg.isObject(), NS_ERROR_INVALID_ARG);
     RootedObject global(cx, UncheckedUnwrap(&globalArg.toObject(),
                                             /* stopAtOuter = */ false));
     NS_ENSURE_TRUE(JS_IsGlobalObject(global), NS_ERROR_INVALID_ARG);
     if (nsContentUtils::IsSystemPrincipal(xpc::GetObjectPrincipal(global))) {
         JS_ReportError(cx, "Script may not be disabled for system globals");
         return NS_ERROR_FAILURE;
     }
     Scriptability::Get(global).Unblock();
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::IsXrayWrapper(HandleValue obj, bool* aRetval)
 {
     *aRetval =
         obj.isObject() && xpc::WrapperFactory::IsXrayWrapper(&obj.toObject());
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::WaiveXrays(HandleValue aVal, JSContext *aCx, MutableHandleValue aRetval)
 {
     RootedValue value(aCx, aVal);
     if (!xpc::WrapperFactory::WaiveXrayAndWrap(aCx, &value))
         return NS_ERROR_FAILURE;
     aRetval.set(value);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::UnwaiveXrays(HandleValue aVal, JSContext *aCx, MutableHandleValue aRetval)
 {
     if (!aVal.isObject()) {
         aRetval.set(aVal);
         return NS_OK;
     }
     RootedObject obj(aCx, js::UncheckedUnwrap(&aVal.toObject()));
     if (!JS_WrapObject(aCx, &obj))
         return NS_ERROR_FAILURE;
     aRetval.setObject(*obj);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetClassName(HandleValue aObj, bool aUnwrap, JSContext *aCx, char **aRv)
 {
     if (!aObj.isObject())
         return NS_ERROR_INVALID_ARG;
     RootedObject obj(aCx, &aObj.toObject());
     if (aUnwrap)
         obj = js::UncheckedUnwrap(obj, /* stopAtOuter = */ false);
     *aRv = NS_strdup(js::GetObjectClass(obj)->name);
     NS_ENSURE_TRUE(*aRv, NS_ERROR_OUT_OF_MEMORY);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetDOMClassInfo(const nsAString& aClassName,
                                        nsIClassInfo** aClassInfo)
 {
     *aClassInfo = nullptr;
     return NS_ERROR_NOT_AVAILABLE;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetIncumbentGlobal(HandleValue aCallback,
                                           JSContext *aCx, MutableHandleValue aOut)
 {
     nsCOMPtr<nsIGlobalObject> global = mozilla::dom::GetIncumbentGlobal();
     RootedValue globalVal(aCx);
     if (!global) {
         globalVal = NullValue();
     } else {
         // Note: We rely on the wrap call for outerization.
         globalVal = ObjectValue(*global->GetGlobalJSObject());
         if (!JS_WrapValue(aCx, &globalVal))
             return NS_ERROR_FAILURE;
     }
     // Invoke the callback, if passed.
     if (aCallback.isObject()) {
         RootedValue ignored(aCx);
         if (!JS_CallFunctionValue(aCx, JS::NullPtr(), aCallback, globalVal, &ignored))
             return NS_ERROR_FAILURE;
     }
     aOut.set(globalVal);
     return NS_OK;
 }
 /*
  * Below is a bunch of awkward junk to allow JS test code to trigger the
  * creation of an XPCWrappedJS, such that it ends up in the map. We need to
  * hand the caller some sort of reference to hold onto (to prevent the
  * refcount from dropping to zero as soon as the function returns), but trying
  * to return a bonafide XPCWrappedJS to script causes all sorts of trouble. So
  * we create a benign holder class instead, which acts as an opaque reference
  * that script can use to keep the XPCWrappedJS alive and in the map.
  */
 class WrappedJSHolder : public nsISupports
 {
     NS_DECL_ISUPPORTS
     WrappedJSHolder() {}
     virtual ~WrappedJSHolder() {}
     nsRefPtr<nsXPCWrappedJS> mWrappedJS;
 };
 NS_IMPL_ISUPPORTS0(WrappedJSHolder);
 NS_IMETHODIMP
 nsXPCComponents_Utils::GenerateXPCWrappedJS(HandleValue aObj, HandleValue aScope,
                                             JSContext *aCx, nsISupports **aOut)
 {
     if (!aObj.isObject())
         return NS_ERROR_INVALID_ARG;
     RootedObject obj(aCx, &aObj.toObject());
     RootedObject scope(aCx, aScope.isObject() ? js::UncheckedUnwrap(&aScope.toObject())
                                               : CurrentGlobalOrNull(aCx));
     JSAutoCompartment ac(aCx, scope);
     if (!JS_WrapObject(aCx, &obj))
         return NS_ERROR_FAILURE;
     nsRefPtr<WrappedJSHolder> holder = new WrappedJSHolder();
     nsresult rv = nsXPCWrappedJS::GetNewOrUsed(obj, NS_GET_IID(nsISupports),
                                                getter_AddRefs(holder->mWrappedJS));
     holder.forget(aOut);
     return rv;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetWatchdogTimestamp(const nsAString& aCategory, PRTime *aOut)
 {
     WatchdogTimestampCategory category;
     if (aCategory.EqualsLiteral("RuntimeStateChange"))
         category = TimestampRuntimeStateChange;
     else if (aCategory.EqualsLiteral("WatchdogWakeup"))
         category = TimestampWatchdogWakeup;
     else if (aCategory.EqualsLiteral("WatchdogHibernateStart"))
         category = TimestampWatchdogHibernateStart;
     else if (aCategory.EqualsLiteral("WatchdogHibernateStop"))
         category = TimestampWatchdogHibernateStop;
     else
         return NS_ERROR_INVALID_ARG;
     *aOut = XPCJSRuntime::Get()->GetWatchdogTimestamp(category);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetJSEngineTelemetryValue(JSContext *cx, MutableHandleValue rval)
 {
     RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), JS::NullPtr()));
     if (!obj)
         return NS_ERROR_OUT_OF_MEMORY;
     unsigned attrs = JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT;
     size_t i = JS_SetProtoCalled(cx);
     RootedValue v(cx, DoubleValue(i));
     if (!JS_DefineProperty(cx, obj, "setProto", v, attrs))
         return NS_ERROR_OUT_OF_MEMORY;
     i = JS_GetCustomIteratorCount(cx);
     v.setDouble(i);
     if (!JS_DefineProperty(cx, obj, "customIter", v, attrs))
         return NS_ERROR_OUT_OF_MEMORY;
     rval.setObject(*obj);
     return NS_OK;
 }
 class MOZ_STACK_CLASS CloneIntoOptions : public OptionsBase
 {
 public:
     CloneIntoOptions(JSContext *cx = xpc_GetSafeJSContext(),
                      JSObject *options = nullptr)
         : OptionsBase(cx, options)
         , cloneFunctions(false)
     {}
     virtual bool Parse()
     {
         return ParseBoolean("cloneFunctions", &cloneFunctions);
     }
     bool cloneFunctions;
 };
 class MOZ_STACK_CLASS CloneIntoCallbacksData
 {
 public:
     CloneIntoCallbacksData(JSContext *aCx, CloneIntoOptions *aOptions)
         : mOptions(aOptions)
         , mFunctions(aCx)
     {}
     CloneIntoOptions *mOptions;
     AutoObjectVector mFunctions;
 };
 static JSObject*
 CloneIntoReadStructuredClone(JSContext *cx,
                              JSStructuredCloneReader *reader,
                              uint32_t tag,
                              uint32_t value,
                              void* closure)
 {
     CloneIntoCallbacksData* data = static_cast<CloneIntoCallbacksData*>(closure);
     MOZ_ASSERT(data);
     if (tag == mozilla::dom::SCTAG_DOM_BLOB || tag == mozilla::dom::SCTAG_DOM_FILELIST) {
         MOZ_ASSERT(!value, "Data should be empty");
         nsISupports *supports;
         if (JS_ReadBytes(reader, &supports, sizeof(supports))) {
             RootedValue val(cx);
             if (NS_SUCCEEDED(nsContentUtils::WrapNative(cx, supports, &val)))
                 return val.toObjectOrNull();
         }
     }
     if (tag == mozilla::dom::SCTAG_DOM_FUNCTION) {
       MOZ_ASSERT(value < data->mFunctions.length());
       RootedValue functionValue(cx);
       RootedObject obj(cx, data->mFunctions[value]);
       if (!JS_WrapObject(cx, &obj))
           return nullptr;
       if (!xpc::NewFunctionForwarder(cx, obj, false, &functionValue))
           return nullptr;
       return &functionValue.toObject();
     }
     return nullptr;
 }
 static bool
 CloneIntoWriteStructuredClone(JSContext *cx,
                               JSStructuredCloneWriter *writer,
                               HandleObject obj,
                               void *closure)
 {
     CloneIntoCallbacksData* data = static_cast<CloneIntoCallbacksData*>(closure);
     MOZ_ASSERT(data);
     nsCOMPtr<nsIXPConnectWrappedNative> wrappedNative;
     nsContentUtils::XPConnect()->GetWrappedNativeOfJSObject(cx, obj, getter_AddRefs(wrappedNative));
     if (wrappedNative) {
         uint32_t scTag = 0;
         nsISupports *supports = wrappedNative->Native();
         nsCOMPtr<nsIDOMBlob> blob = do_QueryInterface(supports);
         if (blob)
             scTag = mozilla::dom::SCTAG_DOM_BLOB;
         else {
             nsCOMPtr<nsIDOMFileList> list = do_QueryInterface(supports);
             if (list)
                 scTag = mozilla::dom::SCTAG_DOM_FILELIST;
         }
         if (scTag) {
             return JS_WriteUint32Pair(writer, scTag, 0) &&
                    JS_WriteBytes(writer, &supports, sizeof(supports));
         }
     }
     if (data->mOptions->cloneFunctions && JS_ObjectIsCallable(cx, obj)) {
         data->mFunctions.append(obj);
         return JS_WriteUint32Pair(writer, mozilla::dom::SCTAG_DOM_FUNCTION,
                                   data->mFunctions.length() - 1);
     }
     return false;
 }
 // These functions serialize raw XPCOM pointers in the data stream, and thus
 // should only be used when the read and write are done together
 // synchronously.
 static JSStructuredCloneCallbacks CloneIntoCallbacks = {
     CloneIntoReadStructuredClone,
     CloneIntoWriteStructuredClone,
     nullptr
 };
 bool
 xpc::CloneInto(JSContext *aCx, HandleValue aValue, HandleValue aScope,
                HandleValue aOptions, MutableHandleValue aCloned)
 {
     if (!aScope.isObject())
         return false;
     RootedObject scope(aCx, &aScope.toObject());
     scope = js::CheckedUnwrap(scope);
     if(!scope) {
         JS_ReportError(aCx, "Permission denied to clone object into scope");
         return false;
     }
     if (!aOptions.isUndefined() && !aOptions.isObject()) {
         JS_ReportError(aCx, "Invalid argument");
         return false;
     }
     RootedObject optionsObject(aCx, aOptions.isObject() ? &aOptions.toObject()
                                                         : nullptr);
     CloneIntoOptions options(aCx, optionsObject);
     if (aOptions.isObject() && !options.Parse())
         return false;
     {
         CloneIntoCallbacksData data(aCx, &options);
         JSAutoCompartment ac(aCx, scope);
         if (!JS_StructuredClone(aCx, aValue, aCloned, &CloneIntoCallbacks, &data))
             return false;
     }
     return JS_WrapValue(aCx, aCloned);
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::CloneInto(HandleValue aValue, HandleValue aScope,
                                  HandleValue aOptions, JSContext *aCx,
                                  MutableHandleValue aCloned)
 {
     return xpc::CloneInto(aCx, aValue, aScope, aOptions, aCloned) ?
            NS_OK : NS_ERROR_FAILURE;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetWebIDLCallerPrincipal(nsIPrincipal **aResult)
 {
     // This API may only be when the Entry Settings Object corresponds to a
     // JS-implemented WebIDL call. In all other cases, the value will be null,
     // and we throw.
     nsCOMPtr<nsIPrincipal> callerPrin = mozilla::dom::GetWebIDLCallerPrincipal();
     if (!callerPrin)
         return NS_ERROR_NOT_AVAILABLE;
     callerPrin.forget(aResult);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents_Utils::GetObjectPrincipal(HandleValue val, JSContext *cx,
                                           nsIPrincipal **result)
 {
     if (!val.isObject())
         return NS_ERROR_INVALID_ARG;
     RootedObject obj(cx, &val.toObject());
     obj = js::CheckedUnwrap(obj);
     MOZ_ASSERT(obj);
     nsCOMPtr<nsIPrincipal> prin = nsContentUtils::GetObjectPrincipal(obj);
     prin.forget(result);
     return NS_OK;
 }
 /***************************************************************************/
 /***************************************************************************/
 /***************************************************************************/
 nsXPCComponentsBase::nsXPCComponentsBase(XPCWrappedNativeScope* aScope)
     :   mScope(aScope)
 {
     MOZ_ASSERT(aScope, "aScope must not be null");
 }
 nsXPCComponents::nsXPCComponents(XPCWrappedNativeScope* aScope)
     :   nsXPCComponentsBase(aScope)
 {
 }
 nsXPCComponentsBase::~nsXPCComponentsBase()
 {
 }
 nsXPCComponents::~nsXPCComponents()
 {
 }
 void
 nsXPCComponentsBase::ClearMembers()
 {
     mInterfaces = nullptr;
     mInterfacesByID = nullptr;
     mResults = nullptr;
 }
 void
 nsXPCComponents::ClearMembers()
 {
     mClasses = nullptr;
     mClassesByID = nullptr;
     mID = nullptr;
     mException = nullptr;
     mConstructor = nullptr;
     mUtils = nullptr;
     nsXPCComponentsBase::ClearMembers();
 }
 /*******************************************/
 #define XPC_IMPL_GET_OBJ_METHOD(_class, _n)                                   \
 NS_IMETHODIMP _class::Get##_n(nsIXPCComponents_##_n * *a##_n) {               \
     NS_ENSURE_ARG_POINTER(a##_n);                                             \
     if (!m##_n)                                                               \
         m##_n = new nsXPCComponents_##_n();                                   \
     nsRefPtr<nsXPCComponents_##_n> ret = m##_n;                               \
     ret.forget(a##_n);                                                        \
     return NS_OK;                                                             \
 }
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponentsBase, Interfaces)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponentsBase, InterfacesByID)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Classes)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, ClassesByID)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponentsBase, Results)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, ID)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Exception)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Constructor)
 XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Utils)
 #undef XPC_IMPL_GET_OBJ_METHOD
 /*******************************************/
 NS_IMETHODIMP
 nsXPCComponentsBase::IsSuccessCode(nsresult result, bool *out)
 {
     *out = NS_SUCCEEDED(result);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents::GetStack(nsIStackFrame * *aStack)
 {
     nsresult rv;
     nsXPConnect* xpc = nsXPConnect::XPConnect();
     rv = xpc->GetCurrentJSStack(aStack);
     return rv;
 }
 NS_IMETHODIMP
 nsXPCComponents::GetManager(nsIComponentManager * *aManager)
 {
     MOZ_ASSERT(aManager, "bad param");
     return NS_GetComponentManager(aManager);
 }
 NS_IMETHODIMP
 nsXPCComponents::GetLastResult(JSContext *aCx, MutableHandleValue aOut)
 {
     XPCContext* xpcc = XPCContext::GetXPCContext(aCx);
     if (!xpcc)
         return NS_ERROR_FAILURE;
     nsresult res = xpcc->GetLastResult();
     aOut.setNumber(static_cast<uint32_t>(res));
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents::GetReturnCode(JSContext *aCx, MutableHandleValue aOut)
 {
     XPCContext* xpcc = XPCContext::GetXPCContext(aCx);
     if (!xpcc)
         return NS_ERROR_FAILURE;
     nsresult res = xpcc->GetPendingResult();
     aOut.setNumber(static_cast<uint32_t>(res));
     return NS_OK;
 }
 NS_IMETHODIMP
 nsXPCComponents::SetReturnCode(JSContext *aCx, HandleValue aCode)
 {
     XPCContext* xpcc = XPCContext::GetXPCContext(aCx);
     if (!xpcc)
         return NS_ERROR_FAILURE;
     nsresult rv;
     if (!ToUint32(aCx, aCode, (uint32_t*)&rv))
         return NS_ERROR_FAILURE;
     xpcc->SetPendingResult(rv);
     xpcc->SetLastResult(rv);
     return NS_OK;
 }
 // static
 /* void reportError (); */
 NS_IMETHODIMP nsXPCComponents::ReportError(HandleValue error, JSContext *cx)
 {
     NS_WARNING("Components.reportError deprecated, use Components.utils.reportError");
     nsCOMPtr<nsIXPCComponents_Utils> utils;
     nsresult rv = GetUtils(getter_AddRefs(utils));
     if (NS_FAILED(rv))
         return rv;
     return utils->ReportError(error, cx);
 }
 /**********************************************/
 class ComponentsSH : public nsIXPCScriptable
 {
 public:
     ComponentsSH(unsigned dummy)
     {
     }
     NS_DECL_ISUPPORTS
     NS_DECL_NSIXPCSCRIPTABLE
     // The NS_IMETHODIMP isn't really accurate here, but NS_CALLBACK requires
     // the referent to be declared __stdcall on Windows, and this is the only
     // macro that does that.
     static NS_IMETHODIMP Get(uint32_t aLangId, nsISupports **helper)
     {
         *helper = &singleton;
         return NS_OK;
     }
 private:
     static ComponentsSH singleton;
 };
 ComponentsSH ComponentsSH::singleton(0);
 // Singleton refcounting.
 NS_IMETHODIMP_(MozExternalRefCountType) ComponentsSH::AddRef(void) { return 1; }
 NS_IMETHODIMP_(MozExternalRefCountType) ComponentsSH::Release(void) { return 1; }
 NS_INTERFACE_MAP_BEGIN(ComponentsSH)
   NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
   NS_INTERFACE_MAP_ENTRY(nsISupports)
 NS_INTERFACE_MAP_END
 #define NSXPCCOMPONENTSBASE_CID \
 { 0xc62998e5, 0x95f1, 0x4058, \
   { 0xa5, 0x09, 0xec, 0x21, 0x66, 0x18, 0x92, 0xb9 } }
 #define NSXPCCOMPONENTS_CID \
 { 0x3649f405, 0xf0ec, 0x4c28, \
     { 0xae, 0xb0, 0xaf, 0x9a, 0x51, 0xe4, 0x4c, 0x81 } }
 NS_IMPL_CLASSINFO(nsXPCComponentsBase, &ComponentsSH::Get, nsIClassInfo::DOM_OBJECT, NSXPCCOMPONENTSBASE_CID)
 NS_IMPL_ISUPPORTS_CI(nsXPCComponentsBase, nsIXPCComponentsBase)
 NS_IMPL_CLASSINFO(nsXPCComponents, &ComponentsSH::Get, nsIClassInfo::DOM_OBJECT, NSXPCCOMPONENTS_CID)
 // Below is more or less what NS_IMPL_ISUPPORTS_CI_INHERITED1 would look like
 // if it existed.
 NS_IMPL_ADDREF_INHERITED(nsXPCComponents, nsXPCComponentsBase)
 NS_IMPL_RELEASE_INHERITED(nsXPCComponents, nsXPCComponentsBase)
 NS_INTERFACE_MAP_BEGIN(nsXPCComponents)
     NS_INTERFACE_MAP_ENTRY(nsIXPCComponents)
     NS_IMPL_QUERY_CLASSINFO(nsXPCComponents)
 NS_INTERFACE_MAP_END_INHERITING(nsXPCComponentsBase)
 NS_IMPL_CI_INTERFACE_GETTER(nsXPCComponents, nsIXPCComponents)
 // The nsIXPCScriptable map declaration that will generate stubs for us
 #define XPC_MAP_CLASSNAME           ComponentsSH
 #define XPC_MAP_QUOTED_CLASSNAME   "nsXPCComponents"
 #define                             XPC_MAP_WANT_PRECREATE
 #include "xpc_map_end.h" /* This will #undef the above */
 NS_IMETHODIMP
 ComponentsSH::PreCreate(nsISupports *nativeObj, JSContext *cx, JSObject *globalObj, JSObject **parentObj)
 {
   nsXPCComponentsBase *self = static_cast<nsXPCComponentsBase*>(nativeObj);
   // this should never happen
   if (!self->GetScope()) {
       NS_WARNING("mScope must not be null when nsXPCComponents::PreCreate is called");
       return NS_ERROR_FAILURE;
   }
   *parentObj = self->GetScope()->GetGlobalJSObject();
   return NS_OK;
 }

The Tor Browser / annotate

js/xpconnect/src/XPCComponents.cpp@a63d609f5ebe (annotated)

js/xpconnect/src/XPCComponents.cpp