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Diffstat (limited to '')
| -rw-r--r-- | js/xpconnect/src/XPCComponents.cpp | 2665 |
1 files changed, 2665 insertions, 0 deletions
diff --git a/js/xpconnect/src/XPCComponents.cpp b/js/xpconnect/src/XPCComponents.cpp new file mode 100644 index 0000000000..77df85b5f8 --- /dev/null +++ b/js/xpconnect/src/XPCComponents.cpp @@ -0,0 +1,2665 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* The "Components" xpcom objects for JavaScript. */ + +#include "xpcprivate.h" +#include "xpc_make_class.h" +#include "JSServices.h" +#include "XPCJSWeakReference.h" +#include "AccessCheck.h" +#include "WrapperFactory.h" +#include "nsJSUtils.h" +#include "mozJSModuleLoader.h" +#include "nsContentUtils.h" +#include "nsCycleCollector.h" +#include "jsfriendapi.h" +#include "js/Array.h" // JS::IsArrayObject +#include "js/CallAndConstruct.h" // JS::IsCallable, JS_CallFunctionName, JS_CallFunctionValue +#include "js/CharacterEncoding.h" +#include "js/ContextOptions.h" +#include "js/friend/WindowProxy.h" // js::ToWindowProxyIfWindow +#include "js/Object.h" // JS::GetClass, JS::GetCompartment +#include "js/PropertyAndElement.h" // JS_DefineProperty, JS_DefinePropertyById, JS_Enumerate, JS_GetProperty, JS_GetPropertyById, JS_HasProperty, JS_SetProperty, JS_SetPropertyById +#include "js/SavedFrameAPI.h" +#include "js/StructuredClone.h" +#include "mozilla/AppShutdown.h" +#include "mozilla/Attributes.h" +#include "mozilla/LoadContext.h" +#include "mozilla/Preferences.h" +#include "nsJSEnvironment.h" +#include "mozilla/BasePrincipal.h" +#include "mozilla/TimeStamp.h" +#include "mozilla/ResultExtensions.h" +#include "mozilla/URLPreloader.h" +#include "mozilla/dom/DOMException.h" +#include "mozilla/dom/DOMExceptionBinding.h" +#include "mozilla/dom/Exceptions.h" +#include "mozilla/dom/BindingUtils.h" +#include "mozilla/dom/RemoteObjectProxy.h" +#include "mozilla/dom/StructuredCloneTags.h" +#include "mozilla/dom/WindowBinding.h" +#include "nsZipArchive.h" +#include "nsWindowMemoryReporter.h" +#include "nsICycleCollectorListener.h" +#include "nsIException.h" +#include "nsIScriptError.h" +#include "nsPIDOMWindow.h" +#include "nsGlobalWindow.h" +#include "nsScriptError.h" +#include "GeckoProfiler.h" +#include "ProfilerControl.h" +#include "mozilla/EditorSpellCheck.h" +#include "nsCommandLine.h" +#include "nsCommandParams.h" +#include "nsPersistentProperties.h" +#include "nsIDocumentEncoder.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> iface; + + if (v.isPrimitive()) { + return false; + } + + nsIXPConnect* xpc = nsIXPConnect::XPConnect(); + RootedObject obj(cx, &v.toObject()); + return NS_SUCCEEDED( + xpc->GetWrappedNativeOfJSObject(cx, obj, getter_AddRefs(wn))) && + wn && + NS_SUCCEEDED( + wn->Native()->QueryInterface(iid, getter_AddRefs(iface))) && + iface; +} + +/***************************************************************************/ +/***************************************************************************/ +/***************************************************************************/ + +class nsXPCComponents_Interfaces final : 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(); + + private: + virtual ~nsXPCComponents_Interfaces(); +}; + +NS_IMETHODIMP +nsXPCComponents_Interfaces::GetInterfaces(nsTArray<nsIID>& aArray) { + aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Interfaces), + NS_GET_IID(nsIXPCScriptable)}; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Interfaces::GetScriptableHelper(nsIXPCScriptable** retval) { + *retval = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Interfaces::GetContractID(nsACString& aContractID) { + aContractID.SetIsVoid(true); + return NS_ERROR_NOT_AVAILABLE; +} + +NS_IMETHODIMP +nsXPCComponents_Interfaces::GetClassDescription(nsACString& aClassDescription) { + aClassDescription.AssignLiteral("XPCComponents_Interfaces"); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Interfaces::GetClassID(nsCID** aClassID) { + *aClassID = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Interfaces::GetFlags(uint32_t* aFlags) { + *aFlags = 0; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Interfaces::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) { + return NS_ERROR_NOT_AVAILABLE; +} + +nsXPCComponents_Interfaces::nsXPCComponents_Interfaces() = default; + +nsXPCComponents_Interfaces::~nsXPCComponents_Interfaces() { + // empty +} + +NS_IMPL_ISUPPORTS(nsXPCComponents_Interfaces, nsIXPCComponents_Interfaces, + nsIXPCScriptable, nsIClassInfo); + +// 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_FLAGS \ + (XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_WANT_NEWENUMERATE | \ + XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE) +#include "xpc_map_end.h" /* This will #undef the above */ + +NS_IMETHODIMP +nsXPCComponents_Interfaces::NewEnumerate(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* obj, + JS::MutableHandleIdVector properties, + bool enumerableOnly, bool* _retval) { + if (!properties.reserve(nsXPTInterfaceInfo::InterfaceCount())) { + *_retval = false; + return NS_OK; + } + + for (uint32_t index = 0; index < nsXPTInterfaceInfo::InterfaceCount(); + index++) { + const nsXPTInterfaceInfo* interface = nsXPTInterfaceInfo::ByIndex(index); + if (!interface) { + continue; + } + + const char* name = interface->Name(); + if (!name) { + continue; + } + + RootedString idstr(cx, JS_NewStringCopyZ(cx, name)); + if (!idstr) { + *_retval = false; + return NS_OK; + } + + RootedId id(cx); + if (!JS_StringToId(cx, idstr, &id)) { + *_retval = false; + return NS_OK; + } + + properties.infallibleAppend(id); + } + + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Interfaces::Resolve(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* objArg, jsid idArg, + bool* resolvedp, bool* _retval) { + RootedObject obj(cx, objArg); + RootedId id(cx, idArg); + + if (!id.isString()) { + return NS_OK; + } + + RootedString str(cx, id.toString()); + JS::UniqueChars name = JS_EncodeStringToLatin1(cx, str); + + // we only allow interfaces by name here + if (name && name[0] != '{') { + const nsXPTInterfaceInfo* info = nsXPTInterfaceInfo::ByName(name.get()); + if (!info) { + return NS_OK; + } + + RootedValue iidv(cx); + if (xpc::IfaceID2JSValue(cx, *info, &iidv)) { + *resolvedp = true; + *_retval = JS_DefinePropertyById(cx, obj, id, iidv, + JSPROP_ENUMERATE | JSPROP_READONLY | + JSPROP_PERMANENT | JSPROP_RESOLVING); + } + } + return NS_OK; +} + +/***************************************************************************/ +/***************************************************************************/ +/***************************************************************************/ + +class nsXPCComponents_Classes final : 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(); + + private: + virtual ~nsXPCComponents_Classes(); +}; + +/***************************************************************************/ +NS_IMETHODIMP +nsXPCComponents_Classes::GetInterfaces(nsTArray<nsIID>& aArray) { + aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Classes), + NS_GET_IID(nsIXPCScriptable)}; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Classes::GetScriptableHelper(nsIXPCScriptable** retval) { + *retval = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Classes::GetContractID(nsACString& aContractID) { + aContractID.SetIsVoid(true); + return NS_ERROR_NOT_AVAILABLE; +} + +NS_IMETHODIMP +nsXPCComponents_Classes::GetClassDescription(nsACString& aClassDescription) { + aClassDescription.AssignLiteral("XPCComponents_Classes"); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Classes::GetClassID(nsCID** aClassID) { + *aClassID = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Classes::GetFlags(uint32_t* aFlags) { + *aFlags = 0; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Classes::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) { + return NS_ERROR_NOT_AVAILABLE; +} + +nsXPCComponents_Classes::nsXPCComponents_Classes() = default; + +nsXPCComponents_Classes::~nsXPCComponents_Classes() { + // empty +} + +NS_IMPL_ISUPPORTS(nsXPCComponents_Classes, nsIXPCComponents_Classes, + nsIXPCScriptable, nsIClassInfo) + +// 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_FLAGS \ + (XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_WANT_NEWENUMERATE | \ + XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE) +#include "xpc_map_end.h" /* This will #undef the above */ + +NS_IMETHODIMP +nsXPCComponents_Classes::NewEnumerate(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* obj, + JS::MutableHandleIdVector properties, + bool enumerableOnly, bool* _retval) { + nsCOMPtr<nsIComponentRegistrar> compMgr; + if (NS_FAILED(NS_GetComponentRegistrar(getter_AddRefs(compMgr))) || + !compMgr) { + return NS_ERROR_UNEXPECTED; + } + + nsTArray<nsCString> contractIDs; + if (NS_FAILED(compMgr->GetContractIDs(contractIDs))) { + return NS_ERROR_UNEXPECTED; + } + + for (const auto& name : contractIDs) { + RootedString idstr(cx, JS_NewStringCopyN(cx, name.get(), name.Length())); + if (!idstr) { + *_retval = false; + return NS_OK; + } + + RootedId id(cx); + if (!JS_StringToId(cx, idstr, &id)) { + *_retval = false; + return NS_OK; + } + + if (!properties.append(id)) { + *_retval = false; + return NS_OK; + } + } + + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Classes::Resolve(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* objArg, jsid idArg, + bool* resolvedp, bool* _retval) + +{ + RootedId id(cx, idArg); + RootedObject obj(cx, objArg); + + RootedValue cidv(cx); + if (id.isString() && xpc::ContractID2JSValue(cx, id.toString(), &cidv)) { + *resolvedp = true; + *_retval = JS_DefinePropertyById(cx, obj, id, cidv, + JSPROP_ENUMERATE | JSPROP_READONLY | + JSPROP_PERMANENT | JSPROP_RESOLVING); + } + 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 final : 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(); + + private: + virtual ~nsXPCComponents_Results(); +}; + +/***************************************************************************/ +NS_IMETHODIMP +nsXPCComponents_Results::GetInterfaces(nsTArray<nsIID>& aArray) { + aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Results), + NS_GET_IID(nsIXPCScriptable)}; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Results::GetScriptableHelper(nsIXPCScriptable** retval) { + *retval = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Results::GetContractID(nsACString& aContractID) { + aContractID.SetIsVoid(true); + return NS_ERROR_NOT_AVAILABLE; +} + +NS_IMETHODIMP +nsXPCComponents_Results::GetClassDescription(nsACString& aClassDescription) { + aClassDescription.AssignLiteral("XPCComponents_Results"); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Results::GetClassID(nsCID** aClassID) { + *aClassID = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Results::GetFlags(uint32_t* aFlags) { + *aFlags = 0; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Results::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) { + return NS_ERROR_NOT_AVAILABLE; +} + +nsXPCComponents_Results::nsXPCComponents_Results() = default; + +nsXPCComponents_Results::~nsXPCComponents_Results() { + // empty +} + +NS_IMPL_ISUPPORTS(nsXPCComponents_Results, nsIXPCComponents_Results, + nsIXPCScriptable, nsIClassInfo) + +// 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_FLAGS \ + (XPC_SCRIPTABLE_WANT_RESOLVE | XPC_SCRIPTABLE_WANT_NEWENUMERATE | \ + XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE) +#include "xpc_map_end.h" /* This will #undef the above */ + +NS_IMETHODIMP +nsXPCComponents_Results::NewEnumerate(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* obj, + JS::MutableHandleIdVector properties, + bool enumerableOnly, bool* _retval) { + const char* name; + const void* iter = nullptr; + while (nsXPCException::IterateNSResults(nullptr, &name, nullptr, &iter)) { + RootedString idstr(cx, JS_NewStringCopyZ(cx, name)); + if (!idstr) { + *_retval = false; + return NS_OK; + } + + RootedId id(cx); + if (!JS_StringToId(cx, idstr, &id)) { + *_retval = false; + return NS_OK; + } + + if (!properties.append(id)) { + *_retval = false; + return NS_OK; + } + } + + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Results::Resolve(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* objArg, jsid idArg, + bool* resolvedp, bool* _retval) { + RootedObject obj(cx, objArg); + RootedId id(cx, idArg); + if (!id.isString()) { + return NS_OK; + } + + JS::UniqueChars name = JS_EncodeStringToLatin1(cx, id.toString()); + if (name) { + const char* rv_name; + const void* iter = nullptr; + nsresult rv; + while (nsXPCException::IterateNSResults(&rv, &rv_name, nullptr, &iter)) { + if (!strcmp(name.get(), rv_name)) { + *resolvedp = true; + if (!JS_DefinePropertyById(cx, obj, id, (uint32_t)rv, + JSPROP_ENUMERATE | JSPROP_READONLY | + JSPROP_PERMANENT | JSPROP_RESOLVING)) { + return NS_ERROR_UNEXPECTED; + } + } + } + } + return NS_OK; +} + +/***************************************************************************/ +// JavaScript Constructor for nsIJSID objects (Components.ID) + +class nsXPCComponents_ID final : 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(); + + private: + virtual ~nsXPCComponents_ID(); + static nsresult CallOrConstruct(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, HandleObject obj, + const CallArgs& args, bool* _retval); +}; + +/***************************************************************************/ +NS_IMETHODIMP +nsXPCComponents_ID::GetInterfaces(nsTArray<nsIID>& aArray) { + aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_ID), + NS_GET_IID(nsIXPCScriptable)}; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_ID::GetScriptableHelper(nsIXPCScriptable** retval) { + *retval = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_ID::GetContractID(nsACString& aContractID) { + aContractID.SetIsVoid(true); + return NS_ERROR_NOT_AVAILABLE; +} + +NS_IMETHODIMP +nsXPCComponents_ID::GetClassDescription(nsACString& aClassDescription) { + aClassDescription.AssignLiteral("XPCComponents_ID"); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_ID::GetClassID(nsCID** aClassID) { + *aClassID = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_ID::GetFlags(uint32_t* aFlags) { + *aFlags = 0; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_ID::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) { + return NS_ERROR_NOT_AVAILABLE; +} + +nsXPCComponents_ID::nsXPCComponents_ID() = default; + +nsXPCComponents_ID::~nsXPCComponents_ID() { + // empty +} + +NS_IMPL_ISUPPORTS(nsXPCComponents_ID, nsIXPCComponents_ID, nsIXPCScriptable, + nsIClassInfo) + +// 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_FLAGS \ + (XPC_SCRIPTABLE_WANT_CALL | XPC_SCRIPTABLE_WANT_CONSTRUCT | \ + XPC_SCRIPTABLE_WANT_HASINSTANCE | \ + XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE) +#include "xpc_map_end.h" /* This will #undef the above */ + +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); +} + +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); + } + + // Prevent non-chrome code from creating ID objects. + if (!nsContentUtils::IsCallerChrome()) { + return ThrowAndFail(NS_ERROR_DOM_XPCONNECT_ACCESS_DENIED, cx, _retval); + } + + // convert the first argument into a string and see if it looks like an id + + JSString* jsstr = ToString(cx, args[0]); + if (!jsstr) { + return ThrowAndFail(NS_ERROR_XPC_BAD_ID_STRING, cx, _retval); + } + + JS::UniqueChars bytes = JS_EncodeStringToLatin1(cx, jsstr); + if (!bytes) { + return ThrowAndFail(NS_ERROR_XPC_BAD_ID_STRING, cx, _retval); + } + + nsID id; + if (!id.Parse(bytes.get())) { + return ThrowAndFail(NS_ERROR_XPC_BAD_ID_STRING, cx, _retval); + } + + // make the new object and return it. + + if (!xpc::ID2JSValue(cx, id, args.rval())) { + return NS_ERROR_UNEXPECTED; + } + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_ID::HasInstance(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* obj, HandleValue val, + bool* bp, bool* _retval) { + if (bp) { + *bp = xpc::JSValue2ID(cx, val).isSome(); + } + return NS_OK; +} + +/***************************************************************************/ +// JavaScript Constructor for Exception objects (Components.Exception) + +class nsXPCComponents_Exception final : 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(); + + private: + virtual ~nsXPCComponents_Exception(); + static nsresult CallOrConstruct(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, HandleObject obj, + const CallArgs& args, bool* _retval); +}; + +/***************************************************************************/ +NS_IMETHODIMP +nsXPCComponents_Exception::GetInterfaces(nsTArray<nsIID>& aArray) { + aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Exception), + NS_GET_IID(nsIXPCScriptable)}; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Exception::GetScriptableHelper(nsIXPCScriptable** retval) { + *retval = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Exception::GetContractID(nsACString& aContractID) { + aContractID.SetIsVoid(true); + return NS_ERROR_NOT_AVAILABLE; +} + +NS_IMETHODIMP +nsXPCComponents_Exception::GetClassDescription(nsACString& aClassDescription) { + aClassDescription.AssignLiteral("XPCComponents_Exception"); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Exception::GetClassID(nsCID** aClassID) { + *aClassID = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Exception::GetFlags(uint32_t* aFlags) { + *aFlags = 0; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Exception::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) { + return NS_ERROR_NOT_AVAILABLE; +} + +nsXPCComponents_Exception::nsXPCComponents_Exception() = default; + +nsXPCComponents_Exception::~nsXPCComponents_Exception() { + // empty +} + +NS_IMPL_ISUPPORTS(nsXPCComponents_Exception, nsIXPCComponents_Exception, + nsIXPCScriptable, nsIClassInfo) + +// 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_FLAGS \ + (XPC_SCRIPTABLE_WANT_CALL | XPC_SCRIPTABLE_WANT_CONSTRUCT | \ + XPC_SCRIPTABLE_WANT_HASINSTANCE | \ + XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE) +#include "xpc_map_end.h" /* This will #undef the above */ + +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); +} + +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, nsIXPConnect* 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; + } + messageBytes = JS_EncodeStringToLatin1(cx, str); + eMsg = messageBytes.get(); + 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; + } + + RootedObject stackObj(cx, &v.toObject()); + return NS_SUCCEEDED(xpc->WrapJS(cx, stackObj, 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; + } + + RootedObject obj(cx, &v.toObject()); + return NS_SUCCEEDED( + xpc->WrapJS(cx, obj, 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. + JS::UniqueChars messageBytes; + + // Various bits and pieces that are helpful to have around. + JSContext* cx; + nsIXPConnect* xpc; +}; + +// static +nsresult nsXPCComponents_Exception::CallOrConstruct( + nsIXPConnectWrappedNative* wrapper, JSContext* cx, HandleObject obj, + const CallArgs& args, bool* _retval) { + nsIXPConnect* xpc = nsIXPConnect::XPConnect(); + + MOZ_DIAGNOSTIC_ASSERT(nsContentUtils::IsCallerChrome()); + + // 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); + } + + RefPtr<Exception> e = new Exception(nsCString(parser.eMsg), parser.eResult, + ""_ns, parser.eStack, parser.eData); + + RootedObject newObj(cx); + if (NS_FAILED(xpc->WrapNative(cx, obj, e, NS_GET_IID(nsIException), + newObj.address())) || + !newObj) { + return ThrowAndFail(NS_ERROR_XPC_CANT_CREATE_WN, cx, _retval); + } + + args.rval().setObject(*newObj); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Exception::HasInstance(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* obj, + HandleValue val, bool* bp, + bool* _retval) { + using namespace mozilla::dom; + + if (bp) { + *bp = (val.isObject() && IS_INSTANCE_OF(Exception, &val.toObject())) || + JSValIsInterfaceOfType(cx, val, NS_GET_IID(nsIException)); + } + return NS_OK; +} + +/*******************************************************/ +// JavaScript Constructor for nsIXPCConstructor objects (Components.Constructor) + +class nsXPCComponents_Constructor final : 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(); + + private: + virtual ~nsXPCComponents_Constructor(); + static bool InnerConstructor(JSContext* cx, unsigned argc, JS::Value* vp); + static nsresult CallOrConstruct(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, HandleObject obj, + const CallArgs& args, bool* _retval); +}; + +/***************************************************************************/ +NS_IMETHODIMP +nsXPCComponents_Constructor::GetInterfaces(nsTArray<nsIID>& aArray) { + aArray = nsTArray<nsIID>{NS_GET_IID(nsIXPCComponents_Constructor), + NS_GET_IID(nsIXPCScriptable)}; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Constructor::GetScriptableHelper(nsIXPCScriptable** retval) { + *retval = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Constructor::GetContractID(nsACString& aContractID) { + aContractID.SetIsVoid(true); + return NS_ERROR_NOT_AVAILABLE; +} + +NS_IMETHODIMP +nsXPCComponents_Constructor::GetClassDescription( + nsACString& aClassDescription) { + aClassDescription.AssignLiteral("XPCComponents_Constructor"); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Constructor::GetClassID(nsCID** aClassID) { + *aClassID = nullptr; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Constructor::GetFlags(uint32_t* aFlags) { + *aFlags = 0; + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Constructor::GetClassIDNoAlloc(nsCID* aClassIDNoAlloc) { + return NS_ERROR_NOT_AVAILABLE; +} + +nsXPCComponents_Constructor::nsXPCComponents_Constructor() = default; + +nsXPCComponents_Constructor::~nsXPCComponents_Constructor() { + // empty +} + +NS_IMPL_ISUPPORTS(nsXPCComponents_Constructor, nsIXPCComponents_Constructor, + nsIXPCScriptable, nsIClassInfo) + +// 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_FLAGS \ + (XPC_SCRIPTABLE_WANT_CALL | XPC_SCRIPTABLE_WANT_CONSTRUCT | \ + XPC_SCRIPTABLE_WANT_HASINSTANCE | \ + XPC_SCRIPTABLE_ALLOW_PROP_MODS_DURING_RESOLVE) +#include "xpc_map_end.h" /* This will #undef the above */ + +// static +bool nsXPCComponents_Constructor::InnerConstructor(JSContext* cx, unsigned argc, + JS::Value* vp) { + CallArgs args = CallArgsFromVp(argc, vp); + RootedObject callee(cx, &args.callee()); + + // Fetch the property name ids, so we can look them up. + XPCJSRuntime* runtime = XPCJSRuntime::Get(); + HandleId classIDProp = runtime->GetStringID(XPCJSContext::IDX_CLASS_ID); + HandleId interfaceIDProp = + runtime->GetStringID(XPCJSContext::IDX_INTERFACE_ID); + HandleId initializerProp = + runtime->GetStringID(XPCJSContext::IDX_INITIALIZER); + + // Get properties ('classID', 'interfaceID', and 'initializer') off the + // constructor object. + RootedValue classIDv(cx); + RootedValue interfaceID(cx); + RootedValue initializer(cx); + if (!JS_GetPropertyById(cx, callee, classIDProp, &classIDv) || + !JS_GetPropertyById(cx, callee, interfaceIDProp, &interfaceID) || + !JS_GetPropertyById(cx, callee, initializerProp, &initializer)) { + return false; + } + if (!classIDv.isObject() || !interfaceID.isObject()) { + XPCThrower::Throw(NS_ERROR_UNEXPECTED, cx); + return false; + } + + // Call 'createInstance' on the 'classID' object to create the object. + RootedValue instancev(cx); + RootedObject classID(cx, &classIDv.toObject()); + if (!JS_CallFunctionName(cx, classID, "createInstance", + HandleValueArray(interfaceID), &instancev)) { + return false; + } + if (!instancev.isObject()) { + XPCThrower::Throw(NS_ERROR_FAILURE, cx); + return false; + } + + // Call the method 'initializer' on the instance, passing in our parameters. + if (!initializer.isUndefined()) { + RootedValue dummy(cx); + RootedValue initfunc(cx); + RootedId initid(cx); + RootedObject instance(cx, &instancev.toObject()); + if (!JS_ValueToId(cx, initializer, &initid) || + !JS_GetPropertyById(cx, instance, initid, &initfunc) || + !JS_CallFunctionValue(cx, instance, initfunc, args, &dummy)) { + return false; + } + } + + args.rval().set(instancev); + return true; +} + +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); +} + +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); + } + + // Fetch the property name ids, so we can look them up. + XPCJSRuntime* runtime = XPCJSRuntime::Get(); + HandleId classIDProp = runtime->GetStringID(XPCJSContext::IDX_CLASS_ID); + HandleId interfaceIDProp = + runtime->GetStringID(XPCJSContext::IDX_INTERFACE_ID); + HandleId initializerProp = + runtime->GetStringID(XPCJSContext::IDX_INITIALIZER); + + // get the various other object pointers we need + + nsIXPConnect* xpc = nsIXPConnect::XPConnect(); + XPCWrappedNativeScope* scope = ObjectScope(obj); + nsCOMPtr<nsIXPCComponents> comp; + + if (!xpc || !scope || !(comp = scope->GetComponents())) { + return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval); + } + + // Prevent non-chrome code from creating constructor objects. + if (!nsContentUtils::IsCallerChrome()) { + return ThrowAndFail(NS_ERROR_DOM_XPCONNECT_ACCESS_DENIED, cx, _retval); + } + + JSFunction* ctorfn = JS_NewFunction(cx, InnerConstructor, 0, + JSFUN_CONSTRUCTOR, "XPCOM_Constructor"); + if (!ctorfn) { + return ThrowAndFail(NS_ERROR_OUT_OF_MEMORY, cx, _retval); + } + + JS::RootedObject ctor(cx, JS_GetFunctionObject(ctorfn)); + + if (args.length() >= 3) { + // args[2] is an initializer function or property name + RootedString str(cx, ToString(cx, args[2])); + if (!JS_DefinePropertyById( + cx, ctor, initializerProp, str, + JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) { + return ThrowAndFail(NS_ERROR_FAILURE, cx, _retval); + } + } + + RootedString ifaceName(cx); + if (args.length() >= 2) { + ifaceName = ToString(cx, args[1]); + } else { + ifaceName = JS_NewStringCopyZ(cx, "nsISupports"); + } + + if (!ifaceName) { + return ThrowAndFail(NS_ERROR_XPC_BAD_CONVERT_JS, cx, _retval); + } + + // a new scope to avoid warnings about shadowed names + { + nsCOMPtr<nsIXPCComponents_Interfaces> ifaces; + 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), + ifacesObj.address())) || + !ifacesObj) { + return ThrowAndFail(NS_ERROR_XPC_UNEXPECTED, cx, _retval); + } + + RootedId id(cx); + if (!JS_StringToId(cx, ifaceName, &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); + } + + if (!JS_DefinePropertyById( + cx, ctor, interfaceIDProp, val, + JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) { + return ThrowAndFail(NS_ERROR_FAILURE, cx, _retval); + } + } + + // a new scope to avoid warnings about shadowed names + { + // argv[0] is a contractid name string + + // 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; + RootedObject classesObj(cx); + + if (NS_FAILED(comp->GetClasses(getter_AddRefs(classes))) || + NS_FAILED(xpc->WrapNative(cx, obj, classes, + NS_GET_IID(nsIXPCComponents_Classes), + classesObj.address())) || + !classesObj) { + 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); + } + + if (!JS_DefinePropertyById( + cx, ctor, classIDProp, val, + JSPROP_ENUMERATE | JSPROP_READONLY | JSPROP_PERMANENT)) { + return ThrowAndFail(NS_ERROR_FAILURE, cx, _retval); + } + } + + args.rval().setObject(*ctor); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Constructor::HasInstance(nsIXPConnectWrappedNative* wrapper, + JSContext* cx, JSObject* obj, + HandleValue val, bool* isa, + bool* _retval) { + *isa = + val.isObject() && JS_IsNativeFunction(&val.toObject(), InnerConstructor); + return NS_OK; +} + +class nsXPCComponents_Utils final : public nsIXPCComponents_Utils, + public nsIXPCScriptable { + public: + // all the interface method declarations... + NS_DECL_ISUPPORTS + NS_DECL_NSIXPCSCRIPTABLE + NS_DECL_NSIXPCCOMPONENTS_UTILS + + public: + nsXPCComponents_Utils() = default; + + private: + virtual ~nsXPCComponents_Utils() = default; + nsCOMPtr<nsIXPCComponents_utils_Sandbox> mSandbox; +}; + +NS_IMPL_ISUPPORTS(nsXPCComponents_Utils, nsIXPCComponents_Utils, + nsIXPCScriptable) + +// 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 XPC_SCRIPTABLE_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; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateServicesCache(JSContext* aCx, + MutableHandleValue aServices) { + if (JSObject* services = NewJSServices(aCx)) { + aServices.setObject(*services); + return NS_OK; + } + return NS_ERROR_FAILURE; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::PrintStderr(const nsACString& message) { + printf_stderr("%s", PromiseFlatUTF8String(message).get()); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ReportError(HandleValue error, HandleValue stack, + JSContext* cx) { + // This function shall never fail! Silently eat any failure conditions. + + nsCOMPtr<nsIConsoleService> console( + do_GetService(NS_CONSOLESERVICE_CONTRACTID)); + if (!console) { + return NS_OK; + } + + nsGlobalWindowInner* win = CurrentWindowOrNull(cx); + const uint64_t innerWindowID = win ? win->WindowID() : 0; + + Rooted<Maybe<Value>> exception(cx, Some(error)); + if (!innerWindowID) { + // Leak mitigation: nsConsoleService::ClearMessagesForWindowID needs + // a WindowID for cleanup and exception values could hold arbitrary + // objects alive. + exception = Nothing(); + } + + nsCOMPtr<nsIScriptError> scripterr; + RootedObject errorObj(cx, error.isObject() ? &error.toObject() : nullptr); + if (errorObj) { + JS::RootedObject stackVal(cx); + JS::RootedObject stackGlobal(cx); + FindExceptionStackForConsoleReport(win, error, nullptr, &stackVal, + &stackGlobal); + if (stackVal) { + scripterr = CreateScriptError(win, exception, stackVal, stackGlobal); + } + } + + nsString fileName; + uint32_t lineNo = 0; + + if (!scripterr) { + RootedObject stackObj(cx); + RootedObject stackGlobal(cx); + if (stack.isObject()) { + if (!JS::IsMaybeWrappedSavedFrame(&stack.toObject())) { + return NS_ERROR_INVALID_ARG; + } + + // |stack| might be a wrapper, but it must be same-compartment with + // the current global. + stackObj = &stack.toObject(); + stackGlobal = JS::CurrentGlobalOrNull(cx); + js::AssertSameCompartment(stackObj, stackGlobal); + + JSPrincipals* principals = + JS::GetRealmPrincipals(js::GetContextRealm(cx)); + + if (GetSavedFrameLine(cx, principals, stackObj, &lineNo) != + SavedFrameResult::Ok) { + JS_ClearPendingException(cx); + } + + RootedString source(cx); + nsAutoJSString str; + if (GetSavedFrameSource(cx, principals, stackObj, &source) == + SavedFrameResult::Ok && + str.init(cx, source)) { + fileName = str; + } else { + JS_ClearPendingException(cx); + } + } else { + nsCOMPtr<nsIStackFrame> frame = dom::GetCurrentJSStack(); + if (frame) { + frame->GetFilename(cx, fileName); + lineNo = frame->GetLineNumber(cx); + JS::Rooted<JS::Value> stack(cx); + nsresult rv = frame->GetNativeSavedFrame(&stack); + if (NS_SUCCEEDED(rv) && stack.isObject()) { + stackObj = &stack.toObject(); + MOZ_ASSERT(JS::IsUnwrappedSavedFrame(stackObj)); + stackGlobal = JS::GetNonCCWObjectGlobal(stackObj); + } + } + } + + if (stackObj) { + scripterr = CreateScriptError(win, exception, stackObj, stackGlobal); + } + } + + if (!scripterr) { + scripterr = CreateScriptError(win, exception, nullptr, nullptr); + } + + JSErrorReport* err = errorObj ? JS_ErrorFromException(cx, errorObj) : nullptr; + if (err) { + // It's a proper JS Error + nsAutoString fileUni; + CopyUTF8toUTF16(mozilla::MakeStringSpan(err->filename), fileUni); + + uint32_t column = err->tokenOffset(); + + const char16_t* linebuf = err->linebuf(); + uint32_t flags = err->isWarning() ? nsIScriptError::warningFlag + : nsIScriptError::errorFlag; + + nsresult rv = scripterr->InitWithWindowID( + err->message() ? NS_ConvertUTF8toUTF16(err->message().c_str()) + : EmptyString(), + fileUni, + linebuf ? nsDependentString(linebuf, err->linebufLength()) + : EmptyString(), + err->lineno, column, flags, "XPConnect JavaScript", innerWindowID, + innerWindowID == 0 ? true : false); + 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; + } + + nsAutoJSString msg; + if (!msg.init(cx, msgstr)) { + return NS_OK; + } + + nsresult rv = scripterr->InitWithWindowID( + msg, fileName, u""_ns, lineNo, 0, 0, "XPConnect JavaScript", + innerWindowID, innerWindowID == 0 ? true : false); + NS_ENSURE_SUCCESS(rv, NS_OK); + + console->LogMessage(scripterr); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::EvalInSandbox( + const nsAString& source, HandleValue sandboxVal, HandleValue version, + const nsACString& filenameArg, int32_t lineNumber, + bool enforceFilenameRestrictions, 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, is unused. + + // 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. + nsCOMPtr<nsIStackFrame> frame = dom::GetCurrentJSStack(); + if (frame) { + nsString frameFile; + frame->GetFilename(cx, frameFile); + CopyUTF16toUTF8(frameFile, filename); + lineNo = frame->GetLineNumber(cx); + } + } + enforceFilenameRestrictions = + (optionalArgc >= 4) ? enforceFilenameRestrictions : true; + + return xpc::EvalInSandbox(cx, sandbox, source, filename, lineNo, + enforceFilenameRestrictions, retval); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetUAWidgetScope(nsIPrincipal* principal, JSContext* cx, + MutableHandleValue rval) { + rval.set(UndefinedValue()); + + JSObject* scope = xpc::GetUAWidgetScope(cx, principal); + + rval.set(JS::ObjectValue(*scope)); + + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetSandboxMetadata(HandleValue sandboxVal, JSContext* cx, + MutableHandleValue rval) { + if (!sandboxVal.isObject()) { + return NS_ERROR_INVALID_ARG; + } + + RootedObject sandbox(cx, &sandboxVal.toObject()); + // We only care about sandboxes here, so CheckedUnwrapStatic is fine. + sandbox = js::CheckedUnwrapStatic(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()); + // We only care about sandboxes here, so CheckedUnwrapStatic is fine. + sandbox = js::CheckedUnwrapStatic(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; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::Import(const nsACString& registryLocation, + HandleValue targetObj, JSContext* cx, + uint8_t optionalArgc, MutableHandleValue retval) { + RefPtr moduleloader = mozJSModuleLoader::Get(); + MOZ_ASSERT(moduleloader); + + AUTO_PROFILER_LABEL_DYNAMIC_NSCSTRING("nsXPCComponents_Utils::Import", OTHER, + registryLocation); + + return moduleloader->ImportInto(registryLocation, targetObj, cx, optionalArgc, + retval); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::IsModuleLoaded(const nsACString& aResourceURI, + bool* retval) { + RefPtr moduleloader = mozJSModuleLoader::Get(); + MOZ_ASSERT(moduleloader); + return moduleloader->IsModuleLoaded(aResourceURI, retval); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::IsJSModuleLoaded(const nsACString& aResourceURI, + bool* retval) { + RefPtr moduleloader = mozJSModuleLoader::Get(); + MOZ_ASSERT(moduleloader); + return moduleloader->IsJSModuleLoaded(aResourceURI, retval); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::IsESModuleLoaded(const nsACString& aResourceURI, + bool* retval) { + RefPtr moduleloader = mozJSModuleLoader::Get(); + MOZ_ASSERT(moduleloader); + return moduleloader->IsESModuleLoaded(aResourceURI, retval); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::Unload(const nsACString& registryLocation) { + RefPtr moduleloader = mozJSModuleLoader::Get(); + MOZ_ASSERT(moduleloader); + return moduleloader->Unload(registryLocation); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ImportGlobalProperties(HandleValue aPropertyList, + JSContext* cx) { + // Ensure we're working in the scripted caller's realm. This is not guaranteed + // to be the current realm because we switch realms when calling cross-realm + // functions. + RootedObject global(cx, JS::GetScriptedCallerGlobal(cx)); + MOZ_ASSERT(global); + js::AssertSameCompartment(cx, global); + JSAutoRealm ar(cx, global); + + // Don't allow doing this if the global is a Window. + nsGlobalWindowInner* win; + if (NS_SUCCEEDED(UNWRAP_NON_WRAPPER_OBJECT(Window, global, win))) { + return NS_ERROR_NOT_AVAILABLE; + } + + GlobalProperties options; + NS_ENSURE_TRUE(aPropertyList.isObject(), NS_ERROR_INVALID_ARG); + + RootedObject propertyList(cx, &aPropertyList.toObject()); + bool isArray; + if (NS_WARN_IF(!JS::IsArrayObject(cx, propertyList, &isArray))) { + return NS_ERROR_FAILURE; + } + if (NS_WARN_IF(!isArray)) { + return NS_ERROR_INVALID_ARG; + } + + if (!options.Parse(cx, propertyList) || + !options.DefineInXPCComponents(cx, global)) { + return NS_ERROR_FAILURE; + } + + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetWeakReference(HandleValue object, JSContext* cx, + xpcIJSWeakReference** _retval) { + RefPtr<xpcJSWeakReference> ref = new xpcJSWeakReference(); + nsresult rv = ref->Init(cx, object); + NS_ENSURE_SUCCESS(rv, rv); + ref.forget(_retval); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ForceGC(JSContext* aCx) { + PrepareForFullGC(aCx); + NonIncrementalGC(aCx, GCOptions::Normal, GCReason::COMPONENT_UTILS); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ForceCC(nsICycleCollectorListener* listener) { + nsJSContext::CycleCollectNow(CCReason::API, listener); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateCCLogger(nsICycleCollectorListener** aListener) { + NS_ENSURE_ARG_POINTER(aListener); + nsCOMPtr<nsICycleCollectorListener> logger = nsCycleCollector_createLogger(); + logger.forget(aListener); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::FinishCC() { + nsCycleCollector_finishAnyCurrentCollection(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CcSlice(int64_t budget) { + nsJSContext::RunCycleCollectorWorkSlice(budget); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetMaxCCSliceTimeSinceClear(int32_t* out) { + *out = nsJSContext::GetMaxCCSliceTimeSinceClear(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ClearMaxCCTime() { + nsJSContext::ClearMaxCCSliceTime(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ForceShrinkingGC(JSContext* aCx) { + PrepareForFullGC(aCx); + NonIncrementalGC(aCx, GCOptions::Shrink, GCReason::COMPONENT_UTILS); + return NS_OK; +} + +class PreciseGCRunnable : public Runnable { + public: + PreciseGCRunnable(nsIScheduledGCCallback* aCallback, bool aShrinking) + : mozilla::Runnable("PreciseGCRunnable"), + mCallback(aCallback), + mShrinking(aShrinking) {} + + NS_IMETHOD Run() override { + nsJSContext::GarbageCollectNow( + GCReason::COMPONENT_UTILS, + mShrinking ? nsJSContext::ShrinkingGC : nsJSContext::NonShrinkingGC); + + mCallback->Callback(); + return NS_OK; + } + + private: + nsCOMPtr<nsIScheduledGCCallback> mCallback; + bool mShrinking; +}; + +NS_IMETHODIMP +nsXPCComponents_Utils::SchedulePreciseGC(nsIScheduledGCCallback* aCallback) { + RefPtr<PreciseGCRunnable> event = new PreciseGCRunnable(aCallback, false); + return NS_DispatchToMainThread(event); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::SchedulePreciseShrinkingGC( + nsIScheduledGCCallback* aCallback) { + RefPtr<PreciseGCRunnable> event = new PreciseGCRunnable(aCallback, true); + return NS_DispatchToMainThread(event); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::UnlinkGhostWindows() { +#ifdef DEBUG + nsWindowMemoryReporter::UnlinkGhostWindows(); + + if (XRE_IsParentProcess()) { + nsCOMPtr<nsIObserverService> obsvc = services::GetObserverService(); + if (obsvc) { + obsvc->NotifyObservers(nullptr, "child-ghost-request", nullptr); + } + } + + return NS_OK; +#else + return NS_ERROR_NOT_IMPLEMENTED; +#endif +} + +#ifdef NS_FREE_PERMANENT_DATA +struct IntentionallyLeakedObject { + MOZ_COUNTED_DEFAULT_CTOR(IntentionallyLeakedObject) + + MOZ_COUNTED_DTOR(IntentionallyLeakedObject) +}; +#endif + +NS_IMETHODIMP +nsXPCComponents_Utils::IntentionallyLeak() { +#ifdef NS_FREE_PERMANENT_DATA + Unused << new IntentionallyLeakedObject(); + return NS_OK; +#else + return NS_ERROR_NOT_IMPLEMENTED; +#endif +} + +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; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetFunctionSourceLocation(HandleValue funcValue, + JSContext* cx, + MutableHandleValue retval) { + NS_ENSURE_TRUE(funcValue.isObject(), NS_ERROR_INVALID_ARG); + + nsAutoString filename; + uint32_t lineNumber; + { + RootedObject funcObj(cx, UncheckedUnwrap(&funcValue.toObject())); + JSAutoRealm ar(cx, funcObj); + + Rooted<JSFunction*> func(cx, JS_GetObjectFunction(funcObj)); + NS_ENSURE_TRUE(func, NS_ERROR_INVALID_ARG); + + RootedScript script(cx, JS_GetFunctionScript(cx, func)); + NS_ENSURE_TRUE(func, NS_ERROR_FAILURE); + + AppendUTF8toUTF16(nsDependentCString(JS_GetScriptFilename(script)), + filename); + lineNumber = JS_GetScriptBaseLineNumber(cx, script) + 1; + } + + RootedObject res(cx, JS_NewPlainObject(cx)); + NS_ENSURE_TRUE(res, NS_ERROR_OUT_OF_MEMORY); + + RootedValue filenameVal(cx); + if (!xpc::NonVoidStringToJsval(cx, filename, &filenameVal) || + !JS_DefineProperty(cx, res, "filename", filenameVal, JSPROP_ENUMERATE)) { + return NS_ERROR_OUT_OF_MEMORY; + } + + if (!JS_DefineProperty(cx, res, "lineNumber", lineNumber, JSPROP_ENUMERATE)) { + return NS_ERROR_OUT_OF_MEMORY; + } + + retval.setObject(*res); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CallFunctionWithAsyncStack(HandleValue function, + nsIStackFrame* stack, + const nsAString& asyncCause, + JSContext* cx, + MutableHandleValue retval) { + nsresult rv; + + if (!stack || asyncCause.IsEmpty()) { + return NS_ERROR_INVALID_ARG; + } + + JS::Rooted<JS::Value> asyncStack(cx); + rv = stack->GetNativeSavedFrame(&asyncStack); + if (NS_FAILED(rv)) { + return rv; + } + if (!asyncStack.isObject()) { + JS_ReportErrorASCII(cx, "Must use a native JavaScript stack frame"); + return NS_ERROR_INVALID_ARG; + } + + JS::Rooted<JSObject*> asyncStackObj(cx, &asyncStack.toObject()); + + NS_ConvertUTF16toUTF8 utf8Cause(asyncCause); + JS::AutoSetAsyncStackForNewCalls sas( + cx, asyncStackObj, utf8Cause.get(), + JS::AutoSetAsyncStackForNewCalls::AsyncCallKind::EXPLICIT); + + if (!JS_CallFunctionValue(cx, nullptr, function, + JS::HandleValueArray::empty(), retval)) { + return NS_ERROR_XPC_JAVASCRIPT_ERROR; + } + + return NS_OK; +} + +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; + } + + // 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 + // global and then wrap the result. + Rooted<JSObject*> obj(cx, &object.toObject()); + obj = JS::GetNonCCWObjectGlobal(js::UncheckedUnwrap(obj)); + + if (!JS_WrapObject(cx, &obj)) { + return NS_ERROR_FAILURE; + } + + // Get the WindowProxy if necessary. + obj = js::ToWindowProxyIfWindow(obj); + + retval.setObject(*obj); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::IsProxy(HandleValue vobj, JSContext* cx, bool* rval) { + if (!vobj.isObject()) { + *rval = false; + return NS_OK; + } + + RootedObject obj(cx, &vobj.toObject()); + // We need to do a dynamic unwrap, because we apparently want to treat + // "failure to unwrap" differently from "not a proxy" (throw for the former, + // return false for the latter). + obj = js::CheckedUnwrapDynamic(obj, cx, /* stopAtWindowProxy = */ false); + NS_ENSURE_TRUE(obj, NS_ERROR_FAILURE); + + *rval = js::IsScriptedProxy(obj); + return NS_OK; +} + +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; +} + +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; +} + +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())); + JSAutoRealm ar(cx, obj); + Rooted<IdVector> ida(cx, IdVector(cx)); + if (!JS_Enumerate(cx, obj, &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::IsCallable(propobj)) { + continue; + } + + FunctionForwarderOptions forwarderOptions; + if (!NewFunctionForwarder(cx, id, propobj, forwarderOptions, &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; + } + + // We should never have cross-compartment wrappers for dead wrappers. + MOZ_ASSERT_IF(js::IsCrossCompartmentWrapper(&obj.toObject()), + !JS_IsDeadWrapper(js::UncheckedUnwrap(&obj.toObject()))); + + *out = JS_IsDeadWrapper(&obj.toObject()); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::IsRemoteProxy(HandleValue val, bool* out) { + if (val.isObject()) { + *out = dom::IsRemoteObjectProxy(UncheckedUnwrap(&val.toObject())); + ; + } else { + *out = false; + } + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::RecomputeWrappers(HandleValue vobj, JSContext* cx) { + // Determine the compartment of the given object, if any. + JS::Compartment* c = + vobj.isObject() + ? JS::GetCompartment(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; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::SetWantXrays(HandleValue vscope, JSContext* cx) { + if (!vscope.isObject()) { + return NS_ERROR_INVALID_ARG; + } + JSObject* scopeObj = js::UncheckedUnwrap(&vscope.toObject()); + MOZ_RELEASE_ASSERT(!AccessCheck::isChrome(scopeObj), + "Don't call setWantXrays on system-principal scopes"); + JS::Compartment* compartment = JS::GetCompartment(scopeObj); + CompartmentPrivate::Get(scopeObj)->wantXrays = true; + bool ok = js::RecomputeWrappers(cx, js::SingleCompartment(compartment), + js::AllCompartments()); + NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::Dispatch(HandleValue runnableArg, HandleValue scope, + JSContext* cx) { + RootedValue runnable(cx, runnableArg); + // Enter the given realm, if any, and rewrap runnable. + Maybe<JSAutoRealm> ar; + if (scope.isObject()) { + JSObject* scopeObj = js::UncheckedUnwrap(&scope.toObject()); + if (!scopeObj) { + return NS_ERROR_FAILURE; + } + ar.emplace(cx, scopeObj); + if (!JS_WrapValue(cx, &runnable)) { + return NS_ERROR_FAILURE; + } + } + + // Get an XPCWrappedJS for |runnable|. + if (!runnable.isObject()) { + return NS_ERROR_INVALID_ARG; + } + + RootedObject runnableObj(cx, &runnable.toObject()); + nsCOMPtr<nsIRunnable> run; + nsresult rv = nsXPConnect::XPConnect()->WrapJS( + cx, runnableObj, 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; \ + } + +GENERATE_JSCONTEXTOPTION_GETTER_SETTER(Strict_mode, strictMode, setStrictMode) + +#undef GENERATE_JSCONTEXTOPTION_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::GetIsInAutomation(bool* aResult) { + NS_ENSURE_ARG_POINTER(aResult); + + *aResult = xpc::IsInAutomation(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ExitIfInAutomation() { + NS_ENSURE_TRUE(xpc::IsInAutomation(), NS_ERROR_FAILURE); + + profiler_shutdown(IsFastShutdown::Yes); + + mozilla::AppShutdown::DoImmediateExit(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CrashIfNotInAutomation() { + xpc::CrashIfNotInAutomation(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::NukeSandbox(HandleValue obj, JSContext* cx) { + AUTO_PROFILER_LABEL("nsXPCComponents_Utils::NukeSandbox", OTHER); + NS_ENSURE_TRUE(obj.isObject(), NS_ERROR_INVALID_ARG); + JSObject* wrapper = &obj.toObject(); + NS_ENSURE_TRUE(IsWrapper(wrapper), NS_ERROR_INVALID_ARG); + RootedObject sb(cx, UncheckedUnwrap(wrapper)); + NS_ENSURE_TRUE(IsSandbox(sb), NS_ERROR_INVALID_ARG); + + xpc::NukeAllWrappersForRealm(cx, GetNonCCWObjectRealm(sb)); + + 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(), + /* stopAtWindowProxy = */ false)); + NS_ENSURE_TRUE(JS_IsGlobalObject(global), NS_ERROR_INVALID_ARG); + if (xpc::GetObjectPrincipal(global)->IsSystemPrincipal()) { + JS_ReportErrorASCII(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(), + /* stopAtWindowProxy = */ false)); + NS_ENSURE_TRUE(JS_IsGlobalObject(global), NS_ERROR_INVALID_ARG); + if (xpc::GetObjectPrincipal(global)->IsSystemPrincipal()) { + JS_ReportErrorASCII(cx, "Script may not be disabled for system globals"); + return NS_ERROR_FAILURE; + } + Scriptability::Get(global).Unblock(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::IsOpaqueWrapper(HandleValue obj, bool* aRetval) { + *aRetval = + obj.isObject() && xpc::WrapperFactory::IsOpaqueWrapper(&obj.toObject()); + 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, /* stopAtWindowProxy = */ false); + } + *aRv = NS_xstrdup(JS::GetClass(obj)->name); + 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, nullptr, aCallback, + JS::HandleValueArray(globalVal), &ignored)) { + return NS_ERROR_FAILURE; + } + } + + aOut.set(globalVal); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetDebugName(HandleValue aObj, JSContext* aCx, + nsACString& aOut) { + if (!aObj.isObject()) { + return NS_ERROR_INVALID_ARG; + } + + RootedObject obj(aCx, &aObj.toObject()); + aOut = xpc::GetFunctionName(aCx, obj); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetWatchdogTimestamp(const nsAString& aCategory, + PRTime* aOut) { + WatchdogTimestampCategory category; + if (aCategory.EqualsLiteral("ContextStateChange")) { + category = TimestampContextStateChange; + } 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 = XPCJSContext::Get()->GetWatchdogTimestamp(category); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetJSEngineTelemetryValue(JSContext* cx, + MutableHandleValue rval) { + RootedObject obj(cx, JS_NewPlainObject(cx)); + if (!obj) { + return NS_ERROR_OUT_OF_MEMORY; + } + + // No JS engine telemetry in use at the moment. + + rval.setObject(*obj); + return NS_OK; +} + +bool xpc::CloneInto(JSContext* aCx, HandleValue aValue, HandleValue aScope, + HandleValue aOptions, MutableHandleValue aCloned) { + if (!aScope.isObject()) { + return false; + } + + RootedObject scope(aCx, &aScope.toObject()); + // The scope could be a Window, so we need to CheckedUnwrapDynamic. + scope = js::CheckedUnwrapDynamic(scope, aCx); + if (!scope) { + JS_ReportErrorASCII(aCx, "Permission denied to clone object into scope"); + return false; + } + + if (!aOptions.isUndefined() && !aOptions.isObject()) { + JS_ReportErrorASCII(aCx, "Invalid argument"); + return false; + } + + RootedObject optionsObject( + aCx, aOptions.isObject() ? &aOptions.toObject() : nullptr); + StackScopedCloneOptions options(aCx, optionsObject); + if (aOptions.isObject() && !options.Parse()) { + return false; + } + + js::AssertSameCompartment(aCx, aValue); + RootedObject sourceScope(aCx, JS::CurrentGlobalOrNull(aCx)); + + { + JSAutoRealm ar(aCx, scope); + aCloned.set(aValue); + if (!StackScopedClone(aCx, options, sourceScope, aCloned)) { + 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()); + // We need to be able to unwrap to WindowProxy or Location here, so + // use CheckedUnwrapDynamic. + obj = js::CheckedUnwrapDynamic(obj, cx); + MOZ_ASSERT(obj); + + nsCOMPtr<nsIPrincipal> prin = nsContentUtils::ObjectPrincipal(obj); + prin.forget(result); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetRealmLocation(HandleValue val, JSContext* cx, + nsACString& result) { + if (!val.isObject()) { + return NS_ERROR_INVALID_ARG; + } + RootedObject obj(cx, &val.toObject()); + // We need to be able to unwrap to WindowProxy or Location here, so + // use CheckedUnwrapDynamic. + obj = js::CheckedUnwrapDynamic(obj, cx); + MOZ_ASSERT(obj); + + result = xpc::RealmPrivate::Get(obj)->GetLocation(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ReadUTF8File(nsIFile* aFile, nsACString& aResult) { + NS_ENSURE_TRUE(aFile, NS_ERROR_INVALID_ARG); + + MOZ_TRY_VAR(aResult, URLPreloader::ReadFile(aFile)); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::ReadUTF8URI(nsIURI* aURI, nsACString& aResult) { + NS_ENSURE_TRUE(aURI, NS_ERROR_INVALID_ARG); + + MOZ_TRY_VAR(aResult, URLPreloader::ReadURI(aURI)); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::Now(double* aRetval) { + TimeStamp start = TimeStamp::ProcessCreation(); + *aRetval = (TimeStamp::Now() - start).ToMilliseconds(); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateSpellChecker(nsIEditorSpellCheck** aSpellChecker) { + NS_ENSURE_ARG_POINTER(aSpellChecker); + nsCOMPtr<nsIEditorSpellCheck> spellChecker = new mozilla::EditorSpellCheck(); + spellChecker.forget(aSpellChecker); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateCommandLine(const nsTArray<nsCString>& aArgs, + nsIFile* aWorkingDir, uint32_t aState, + nsISupports** aCommandLine) { + NS_ENSURE_ARG_MAX(aState, nsICommandLine::STATE_REMOTE_EXPLICIT); + NS_ENSURE_ARG_POINTER(aCommandLine); + + nsCOMPtr<nsISupports> commandLine = new nsCommandLine(); + nsCOMPtr<nsICommandLineRunner> runner = do_QueryInterface(commandLine); + + nsTArray<const char*> fakeArgv(aArgs.Length() + 2); + + // Prepend a dummy argument for the program name, which will be ignored. + fakeArgv.AppendElement(nullptr); + for (const nsCString& arg : aArgs) { + fakeArgv.AppendElement(arg.get()); + } + // Append a null terminator. + fakeArgv.AppendElement(nullptr); + + nsresult rv = runner->Init(fakeArgv.Length() - 1, fakeArgv.Elements(), + aWorkingDir, aState); + NS_ENSURE_SUCCESS(rv, rv); + + commandLine.forget(aCommandLine); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateCommandParams(nsICommandParams** aCommandParams) { + NS_ENSURE_ARG_POINTER(aCommandParams); + nsCOMPtr<nsICommandParams> commandParams = new nsCommandParams(); + commandParams.forget(aCommandParams); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateLoadContext(nsILoadContext** aLoadContext) { + NS_ENSURE_ARG_POINTER(aLoadContext); + nsCOMPtr<nsILoadContext> loadContext = ::CreateLoadContext(); + loadContext.forget(aLoadContext); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreatePrivateLoadContext(nsILoadContext** aLoadContext) { + NS_ENSURE_ARG_POINTER(aLoadContext); + nsCOMPtr<nsILoadContext> loadContext = ::CreatePrivateLoadContext(); + loadContext.forget(aLoadContext); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreatePersistentProperties( + nsIPersistentProperties** aPersistentProperties) { + NS_ENSURE_ARG_POINTER(aPersistentProperties); + nsCOMPtr<nsIPersistentProperties> props = new nsPersistentProperties(); + props.forget(aPersistentProperties); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateDocumentEncoder( + const char* aContentType, nsIDocumentEncoder** aDocumentEncoder) { + NS_ENSURE_ARG_POINTER(aDocumentEncoder); + nsCOMPtr<nsIDocumentEncoder> encoder = do_createDocumentEncoder(aContentType); + encoder.forget(aDocumentEncoder); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::CreateHTMLCopyEncoder( + nsIDocumentEncoder** aDocumentEncoder) { + NS_ENSURE_ARG_POINTER(aDocumentEncoder); + nsCOMPtr<nsIDocumentEncoder> encoder = do_createHTMLCopyEncoder(); + encoder.forget(aDocumentEncoder); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetLoadedModules(nsTArray<nsCString>& aLoadedModules) { + return mozJSModuleLoader::Get()->GetLoadedJSAndESModules(aLoadedModules); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetLoadedJSModules( + nsTArray<nsCString>& aLoadedJSModules) { + mozJSModuleLoader::Get()->GetLoadedModules(aLoadedJSModules); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetLoadedESModules( + nsTArray<nsCString>& aLoadedESModules) { + return mozJSModuleLoader::Get()->GetLoadedESModules(aLoadedESModules); +} + +NS_IMETHODIMP +nsXPCComponents_Utils::GetModuleImportStack(const nsACString& aLocation, + nsACString& aRetval) { + nsresult rv = + mozJSModuleLoader::Get()->GetModuleImportStack(aLocation, aRetval); + // Fallback the query to the DevTools loader if not found in the shared loader + if (rv == NS_ERROR_FAILURE && mozJSModuleLoader::GetDevToolsLoader()) { + return mozJSModuleLoader::GetDevToolsLoader()->GetModuleImportStack( + aLocation, aRetval); + } + return rv; +} + +/***************************************************************************/ +/***************************************************************************/ +/***************************************************************************/ + +nsXPCComponents::nsXPCComponents(XPCWrappedNativeScope* aScope) + : mScope(aScope) { + MOZ_ASSERT(aScope, "aScope must not be null"); +} + +nsXPCComponents::~nsXPCComponents() = default; + +void nsXPCComponents::ClearMembers() { + mInterfaces = nullptr; + mResults = nullptr; + mClasses = nullptr; + mID = nullptr; + mException = nullptr; + mConstructor = nullptr; + mUtils = nullptr; +} + +/*******************************************/ +#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(); \ + RefPtr<nsXPCComponents_##_n> ret = m##_n; \ + ret.forget(a##_n); \ + return NS_OK; \ + } + +XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Interfaces) +XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, Classes) +XPC_IMPL_GET_OBJ_METHOD(nsXPCComponents, 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 +nsXPCComponents::IsSuccessCode(nsresult result, bool* out) { + *out = NS_SUCCEEDED(result); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents::GetStack(nsIStackFrame** aStack) { + nsCOMPtr<nsIStackFrame> frame = dom::GetCurrentJSStack(); + frame.forget(aStack); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents::GetManager(nsIComponentManager** aManager) { + MOZ_ASSERT(aManager, "bad param"); + return NS_GetComponentManager(aManager); +} + +NS_IMETHODIMP +nsXPCComponents::GetReturnCode(JSContext* aCx, MutableHandleValue aOut) { + nsresult res = XPCJSContext::Get()->GetPendingResult(); + aOut.setNumber(static_cast<uint32_t>(res)); + return NS_OK; +} + +NS_IMETHODIMP +nsXPCComponents::SetReturnCode(JSContext* aCx, HandleValue aCode) { + nsresult rv; + if (!ToUint32(aCx, aCode, (uint32_t*)&rv)) { + return NS_ERROR_FAILURE; + } + XPCJSContext::Get()->SetPendingResult(rv); + return NS_OK; +} + +/**********************************************/ + +class ComponentsSH : public nsIXPCScriptable { + public: + explicit constexpr ComponentsSH(unsigned dummy) {} + + // We don't actually inherit any ref counting infrastructure, but we don't + // need an nsAutoRefCnt member, so the _INHERITED macro is a hack to avoid + // having one. + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_NSIXPCSCRIPTABLE + static nsresult Get(nsIXPCScriptable** 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_IMPL_QUERY_INTERFACE(ComponentsSH, nsIXPCScriptable) + +#define NSXPCCOMPONENTS_CID \ + { \ + 0x3649f405, 0xf0ec, 0x4c28, { \ + 0xae, 0xb0, 0xaf, 0x9a, 0x51, 0xe4, 0x4c, 0x81 \ + } \ + } + +NS_IMPL_CLASSINFO(nsXPCComponents, &ComponentsSH::Get, 0, NSXPCCOMPONENTS_CID) +NS_IMPL_ISUPPORTS_CI(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_FLAGS XPC_SCRIPTABLE_WANT_PRECREATE +#include "xpc_map_end.h" /* This will #undef the above */ + +NS_IMETHODIMP +ComponentsSH::PreCreate(nsISupports* nativeObj, JSContext* cx, + JSObject* globalObj, JSObject** parentObj) { + nsXPCComponents* self = static_cast<nsXPCComponents*>(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()->GetGlobalForWrappedNatives(); + return NS_OK; +} |