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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /js/xpconnect/src/Sandbox.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'js/xpconnect/src/Sandbox.cpp')
-rw-r--r--js/xpconnect/src/Sandbox.cpp1966
1 files changed, 1966 insertions, 0 deletions
diff --git a/js/xpconnect/src/Sandbox.cpp b/js/xpconnect/src/Sandbox.cpp
new file mode 100644
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--- /dev/null
+++ b/js/xpconnect/src/Sandbox.cpp
@@ -0,0 +1,1966 @@
+/* -*- 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.Sandbox object.
+ */
+
+#include "AccessCheck.h"
+#include "jsfriendapi.h"
+#include "js/Proxy.h"
+#include "js/StructuredClone.h"
+#include "nsContentUtils.h"
+#include "nsGlobalWindow.h"
+#include "nsIScriptContext.h"
+#include "nsIScriptObjectPrincipal.h"
+#include "nsIURI.h"
+#include "nsJSUtils.h"
+#include "nsNetUtil.h"
+#include "nsNullPrincipal.h"
+#include "nsPrincipal.h"
+#include "WrapperFactory.h"
+#include "xpcprivate.h"
+#include "xpc_make_class.h"
+#include "XPCWrapper.h"
+#include "XrayWrapper.h"
+#include "Crypto.h"
+#include "mozilla/dom/BindingUtils.h"
+#include "mozilla/dom/BlobBinding.h"
+#include "mozilla/dom/cache/CacheStorage.h"
+#include "mozilla/dom/CSSBinding.h"
+#include "mozilla/dom/DirectoryBinding.h"
+#include "mozilla/dom/IndexedDatabaseManager.h"
+#include "mozilla/dom/Fetch.h"
+#include "mozilla/dom/FileBinding.h"
+#include "mozilla/dom/PromiseBinding.h"
+#include "mozilla/dom/RequestBinding.h"
+#include "mozilla/dom/ResponseBinding.h"
+#ifdef MOZ_WEBRTC
+#include "mozilla/dom/RTCIdentityProviderRegistrar.h"
+#endif
+#include "mozilla/dom/FileReaderBinding.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/TextDecoderBinding.h"
+#include "mozilla/dom/TextEncoderBinding.h"
+#include "mozilla/dom/UnionConversions.h"
+#include "mozilla/dom/URLBinding.h"
+#include "mozilla/dom/URLSearchParamsBinding.h"
+#include "mozilla/dom/XMLHttpRequest.h"
+#include "mozilla/DeferredFinalize.h"
+
+using namespace mozilla;
+using namespace JS;
+using namespace xpc;
+
+using mozilla::dom::DestroyProtoAndIfaceCache;
+using mozilla::dom::IndexedDatabaseManager;
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(SandboxPrivate)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(SandboxPrivate)
+ NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
+ tmp->UnlinkHostObjectURIs();
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(SandboxPrivate)
+ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
+ tmp->TraverseHostObjectURIs(cb);
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_TRACE_WRAPPERCACHE(SandboxPrivate)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(SandboxPrivate)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(SandboxPrivate)
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SandboxPrivate)
+ NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+ NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIScriptObjectPrincipal)
+ NS_INTERFACE_MAP_ENTRY(nsIScriptObjectPrincipal)
+ NS_INTERFACE_MAP_ENTRY(nsIGlobalObject)
+ NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+NS_INTERFACE_MAP_END
+
+const char kScriptSecurityManagerContractID[] = NS_SCRIPTSECURITYMANAGER_CONTRACTID;
+
+class nsXPCComponents_utils_Sandbox : public nsIXPCComponents_utils_Sandbox,
+ public nsIXPCScriptable
+{
+public:
+ // Aren't macros nice?
+ NS_DECL_ISUPPORTS
+ NS_DECL_NSIXPCCOMPONENTS_UTILS_SANDBOX
+ NS_DECL_NSIXPCSCRIPTABLE
+
+public:
+ nsXPCComponents_utils_Sandbox();
+
+private:
+ virtual ~nsXPCComponents_utils_Sandbox();
+
+ static nsresult CallOrConstruct(nsIXPConnectWrappedNative* wrapper,
+ JSContext* cx, HandleObject obj,
+ const CallArgs& args, bool* _retval);
+};
+
+already_AddRefed<nsIXPCComponents_utils_Sandbox>
+xpc::NewSandboxConstructor()
+{
+ nsCOMPtr<nsIXPCComponents_utils_Sandbox> sbConstructor =
+ new nsXPCComponents_utils_Sandbox();
+ return sbConstructor.forget();
+}
+
+static bool
+SandboxDump(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() == 0)
+ return true;
+
+ RootedString str(cx, ToString(cx, args[0]));
+ if (!str)
+ return false;
+
+ JSAutoByteString utf8str;
+ char* cstr = utf8str.encodeUtf8(cx, str);
+ if (!cstr)
+ return false;
+
+#if defined(XP_MACOSX)
+ // Be nice and convert all \r to \n.
+ char* c = cstr;
+ char* cEnd = cstr + strlen(cstr);
+ while (c < cEnd) {
+ if (*c == '\r')
+ *c = '\n';
+ c++;
+ }
+#endif
+#ifdef ANDROID
+ __android_log_write(ANDROID_LOG_INFO, "GeckoDump", cstr);
+#endif
+
+ fputs(cstr, stdout);
+ fflush(stdout);
+ args.rval().setBoolean(true);
+ return true;
+}
+
+static bool
+SandboxDebug(JSContext* cx, unsigned argc, Value* vp)
+{
+#ifdef DEBUG
+ return SandboxDump(cx, argc, vp);
+#else
+ return true;
+#endif
+}
+
+static bool
+SandboxImport(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+
+ if (args.length() < 1 || args[0].isPrimitive()) {
+ XPCThrower::Throw(NS_ERROR_INVALID_ARG, cx);
+ return false;
+ }
+
+ RootedString funname(cx);
+ if (args.length() > 1) {
+ // Use the second parameter as the function name.
+ funname = ToString(cx, args[1]);
+ if (!funname)
+ return false;
+ } else {
+ // NB: funobj must only be used to get the JSFunction out.
+ RootedObject funobj(cx, &args[0].toObject());
+ if (js::IsProxy(funobj)) {
+ funobj = XPCWrapper::UnsafeUnwrapSecurityWrapper(funobj);
+ }
+
+ JSAutoCompartment ac(cx, funobj);
+
+ RootedValue funval(cx, ObjectValue(*funobj));
+ JSFunction* fun = JS_ValueToFunction(cx, funval);
+ if (!fun) {
+ XPCThrower::Throw(NS_ERROR_INVALID_ARG, cx);
+ return false;
+ }
+
+ // Use the actual function name as the name.
+ funname = JS_GetFunctionId(fun);
+ if (!funname) {
+ XPCThrower::Throw(NS_ERROR_INVALID_ARG, cx);
+ return false;
+ }
+ }
+
+ RootedId id(cx);
+ if (!JS_StringToId(cx, funname, &id))
+ return false;
+
+ // We need to resolve the this object, because this function is used
+ // unbound and should still work and act on the original sandbox.
+ RootedObject thisObject(cx, JS_THIS_OBJECT(cx, vp));
+ if (!thisObject) {
+ XPCThrower::Throw(NS_ERROR_UNEXPECTED, cx);
+ return false;
+ }
+ if (!JS_SetPropertyById(cx, thisObject, id, args[0]))
+ return false;
+
+ args.rval().setUndefined();
+ return true;
+}
+
+static bool
+SandboxCreateCrypto(JSContext* cx, JS::HandleObject obj)
+{
+ MOZ_ASSERT(JS_IsGlobalObject(obj));
+
+ nsIGlobalObject* native = xpc::NativeGlobal(obj);
+ MOZ_ASSERT(native);
+
+ dom::Crypto* crypto = new dom::Crypto();
+ crypto->Init(native);
+ JS::RootedObject wrapped(cx, crypto->WrapObject(cx, nullptr));
+ return JS_DefineProperty(cx, obj, "crypto", wrapped, JSPROP_ENUMERATE);
+}
+
+#ifdef MOZ_WEBRTC
+static bool
+SandboxCreateRTCIdentityProvider(JSContext* cx, JS::HandleObject obj)
+{
+ MOZ_ASSERT(JS_IsGlobalObject(obj));
+
+ nsCOMPtr<nsIGlobalObject> nativeGlobal = xpc::NativeGlobal(obj);
+ MOZ_ASSERT(nativeGlobal);
+
+ dom::RTCIdentityProviderRegistrar* registrar =
+ new dom::RTCIdentityProviderRegistrar(nativeGlobal);
+ JS::RootedObject wrapped(cx, registrar->WrapObject(cx, nullptr));
+ return JS_DefineProperty(cx, obj, "rtcIdentityProvider", wrapped, JSPROP_ENUMERATE);
+}
+#endif
+
+static bool
+SetFetchRequestFromValue(JSContext *cx, RequestOrUSVString& request,
+ const MutableHandleValue& requestOrUrl)
+{
+ RequestOrUSVStringArgument requestHolder(request);
+ bool noMatch = true;
+ if (requestOrUrl.isObject() &&
+ !requestHolder.TrySetToRequest(cx, requestOrUrl, noMatch, false)) {
+ return false;
+ }
+ if (noMatch &&
+ !requestHolder.TrySetToUSVString(cx, requestOrUrl, noMatch)) {
+ return false;
+ }
+ if (noMatch) {
+ return false;
+ }
+ return true;
+}
+
+static bool
+SandboxFetch(JSContext* cx, JS::HandleObject scope, const CallArgs& args)
+{
+ if (args.length() < 1) {
+ JS_ReportErrorASCII(cx, "fetch requires at least 1 argument");
+ return false;
+ }
+
+ RequestOrUSVString request;
+ if (!SetFetchRequestFromValue(cx, request, args[0])) {
+ JS_ReportErrorASCII(cx, "fetch requires a string or Request in argument 1");
+ return false;
+ }
+ RootedDictionary<dom::RequestInit> options(cx);
+ if (!options.Init(cx, args.hasDefined(1) ? args[1] : JS::NullHandleValue,
+ "Argument 2 of fetch", false)) {
+ return false;
+ }
+ nsCOMPtr<nsIGlobalObject> global = xpc::NativeGlobal(scope);
+ if (!global) {
+ return false;
+ }
+ ErrorResult rv;
+ RefPtr<dom::Promise> response =
+ FetchRequest(global, Constify(request), Constify(options), rv);
+ if (rv.MaybeSetPendingException(cx)) {
+ return false;
+ }
+
+ args.rval().setObject(*response->PromiseObj());
+ return true;
+}
+
+static bool SandboxFetchPromise(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ RootedObject callee(cx, &args.callee());
+ RootedObject scope(cx, JS::CurrentGlobalOrNull(cx));
+ if (SandboxFetch(cx, scope, args)) {
+ return true;
+ }
+ return ConvertExceptionToPromise(cx, scope, args.rval());
+}
+
+
+static bool
+SandboxCreateFetch(JSContext* cx, HandleObject obj)
+{
+ MOZ_ASSERT(JS_IsGlobalObject(obj));
+
+ return JS_DefineFunction(cx, obj, "fetch", SandboxFetchPromise, 2, 0) &&
+ dom::RequestBinding::GetConstructorObject(cx) &&
+ dom::ResponseBinding::GetConstructorObject(cx) &&
+ dom::HeadersBinding::GetConstructorObject(cx);
+}
+
+static bool
+SandboxIsProxy(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() < 1) {
+ JS_ReportErrorASCII(cx, "Function requires at least 1 argument");
+ return false;
+ }
+ if (!args[0].isObject()) {
+ args.rval().setBoolean(false);
+ return true;
+ }
+
+ RootedObject obj(cx, &args[0].toObject());
+ obj = js::CheckedUnwrap(obj);
+ NS_ENSURE_TRUE(obj, false);
+
+ args.rval().setBoolean(js::IsScriptedProxy(obj));
+ return true;
+}
+
+/*
+ * Expected type of the arguments and the return value:
+ * function exportFunction(function funToExport,
+ * object targetScope,
+ * [optional] object options)
+ */
+static bool
+SandboxExportFunction(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() < 2) {
+ JS_ReportErrorASCII(cx, "Function requires at least 2 arguments");
+ return false;
+ }
+
+ RootedValue options(cx, args.length() > 2 ? args[2] : UndefinedValue());
+ return ExportFunction(cx, args[0], args[1], options, args.rval());
+}
+
+static bool
+SandboxCreateObjectIn(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() < 1) {
+ JS_ReportErrorASCII(cx, "Function requires at least 1 argument");
+ return false;
+ }
+
+ RootedObject optionsObj(cx);
+ bool calledWithOptions = args.length() > 1;
+ if (calledWithOptions) {
+ if (!args[1].isObject()) {
+ JS_ReportErrorASCII(cx, "Expected the 2nd argument (options) to be an object");
+ return false;
+ }
+ optionsObj = &args[1].toObject();
+ }
+
+ CreateObjectInOptions options(cx, optionsObj);
+ if (calledWithOptions && !options.Parse())
+ return false;
+
+ return xpc::CreateObjectIn(cx, args[0], options, args.rval());
+}
+
+static bool
+SandboxCloneInto(JSContext* cx, unsigned argc, Value* vp)
+{
+ CallArgs args = CallArgsFromVp(argc, vp);
+ if (args.length() < 2) {
+ JS_ReportErrorASCII(cx, "Function requires at least 2 arguments");
+ return false;
+ }
+
+ RootedValue options(cx, args.length() > 2 ? args[2] : UndefinedValue());
+ return xpc::CloneInto(cx, args[0], args[1], options, args.rval());
+}
+
+static void
+sandbox_finalize(js::FreeOp* fop, JSObject* obj)
+{
+ nsIScriptObjectPrincipal* sop =
+ static_cast<nsIScriptObjectPrincipal*>(xpc_GetJSPrivate(obj));
+ if (!sop) {
+ // sop can be null if CreateSandboxObject fails in the middle.
+ return;
+ }
+
+ static_cast<SandboxPrivate*>(sop)->ForgetGlobalObject();
+ DestroyProtoAndIfaceCache(obj);
+ DeferredFinalize(sop);
+}
+
+static void
+sandbox_moved(JSObject* obj, const JSObject* old)
+{
+ // Note that this hook can be called before the private pointer is set. In
+ // this case the SandboxPrivate will not exist yet, so there is nothing to
+ // do.
+ nsIScriptObjectPrincipal* sop =
+ static_cast<nsIScriptObjectPrincipal*>(xpc_GetJSPrivate(obj));
+ if (sop)
+ static_cast<SandboxPrivate*>(sop)->ObjectMoved(obj, old);
+}
+
+static bool
+writeToProto_setProperty(JSContext* cx, JS::HandleObject obj, JS::HandleId id,
+ JS::MutableHandleValue vp, JS::ObjectOpResult& result)
+{
+ RootedObject proto(cx);
+ if (!JS_GetPrototype(cx, obj, &proto))
+ return false;
+
+ RootedValue receiver(cx, ObjectValue(*proto));
+ return JS_ForwardSetPropertyTo(cx, proto, id, vp, receiver, result);
+}
+
+static bool
+writeToProto_getProperty(JSContext* cx, JS::HandleObject obj, JS::HandleId id,
+ JS::MutableHandleValue vp)
+{
+ RootedObject proto(cx);
+ if (!JS_GetPrototype(cx, obj, &proto))
+ return false;
+
+ return JS_GetPropertyById(cx, proto, id, vp);
+}
+
+struct AutoSkipPropertyMirroring
+{
+ explicit AutoSkipPropertyMirroring(CompartmentPrivate* priv) : priv(priv) {
+ MOZ_ASSERT(!priv->skipWriteToGlobalPrototype);
+ priv->skipWriteToGlobalPrototype = true;
+ }
+ ~AutoSkipPropertyMirroring() {
+ MOZ_ASSERT(priv->skipWriteToGlobalPrototype);
+ priv->skipWriteToGlobalPrototype = false;
+ }
+
+ private:
+ CompartmentPrivate* priv;
+};
+
+// This hook handles the case when writeToGlobalPrototype is set on the
+// sandbox. This flag asks that any properties defined on the sandbox global
+// also be defined on the sandbox global's prototype. Whenever one of these
+// properties is changed (on either side), the change should be reflected on
+// both sides. We use this functionality to create sandboxes that are
+// essentially "sub-globals" of another global. This is useful for running
+// add-ons in a separate compartment while still giving them access to the
+// chrome window.
+static bool
+sandbox_addProperty(JSContext* cx, HandleObject obj, HandleId id, HandleValue v)
+{
+ CompartmentPrivate* priv = CompartmentPrivate::Get(obj);
+ MOZ_ASSERT(priv->writeToGlobalPrototype);
+
+ // Whenever JS_EnumerateStandardClasses is called, it defines the
+ // "undefined" property, even if it's already defined. We don't want to do
+ // anything in that case.
+ if (id == XPCJSContext::Get()->GetStringID(XPCJSContext::IDX_UNDEFINED))
+ return true;
+
+ // Avoid recursively triggering sandbox_addProperty in the
+ // JS_DefinePropertyById call below.
+ if (priv->skipWriteToGlobalPrototype)
+ return true;
+
+ AutoSkipPropertyMirroring askip(priv);
+
+ RootedObject proto(cx);
+ if (!JS_GetPrototype(cx, obj, &proto))
+ return false;
+
+ // After bug 1015790 is fixed, we should be able to remove this unwrapping.
+ RootedObject unwrappedProto(cx, js::UncheckedUnwrap(proto, /* stopAtWindowProxy = */ false));
+
+ Rooted<JS::PropertyDescriptor> pd(cx);
+ if (!JS_GetPropertyDescriptorById(cx, proto, id, &pd))
+ return false;
+
+ // This is a little icky. If the property exists and is not configurable,
+ // then JS_CopyPropertyFrom will throw an exception when we try to do a
+ // normal assignment since it will think we're trying to remove the
+ // non-configurability. So we do JS_SetPropertyById in that case.
+ //
+ // However, in the case of |const x = 3|, we get called once for
+ // JSOP_DEFCONST and once for JSOP_SETCONST. The first one creates the
+ // property as readonly and configurable. The second one changes the
+ // attributes to readonly and not configurable. If we use JS_SetPropertyById
+ // for the second call, it will throw an exception because the property is
+ // readonly. We have to use JS_CopyPropertyFrom since it ignores the
+ // readonly attribute (as it calls JSObject::defineProperty). See bug
+ // 1019181.
+ if (pd.object() && !pd.configurable()) {
+ if (!JS_SetPropertyById(cx, proto, id, v))
+ return false;
+ } else {
+ if (!JS_CopyPropertyFrom(cx, id, unwrappedProto, obj,
+ MakeNonConfigurableIntoConfigurable))
+ return false;
+ }
+
+ if (!JS_GetPropertyDescriptorById(cx, obj, id, &pd))
+ return false;
+ unsigned attrs = pd.attributes() & ~(JSPROP_GETTER | JSPROP_SETTER);
+ if (!JS_DefinePropertyById(cx, obj, id, v,
+ attrs | JSPROP_PROPOP_ACCESSORS | JSPROP_REDEFINE_NONCONFIGURABLE,
+ JS_PROPERTYOP_GETTER(writeToProto_getProperty),
+ JS_PROPERTYOP_SETTER(writeToProto_setProperty)))
+ return false;
+
+ return true;
+}
+
+#define XPCONNECT_SANDBOX_CLASS_METADATA_SLOT (XPCONNECT_GLOBAL_EXTRA_SLOT_OFFSET)
+
+static const js::ClassOps SandboxClassOps = {
+ nullptr, nullptr, nullptr, nullptr,
+ JS_EnumerateStandardClasses, JS_ResolveStandardClass,
+ JS_MayResolveStandardClass,
+ sandbox_finalize,
+ nullptr, nullptr, nullptr, JS_GlobalObjectTraceHook,
+};
+
+static const js::ClassExtension SandboxClassExtension = {
+ nullptr, /* weakmapKeyDelegateOp */
+ sandbox_moved /* objectMovedOp */
+};
+
+static const js::Class SandboxClass = {
+ "Sandbox",
+ XPCONNECT_GLOBAL_FLAGS_WITH_EXTRA_SLOTS(1) |
+ JSCLASS_FOREGROUND_FINALIZE,
+ &SandboxClassOps,
+ JS_NULL_CLASS_SPEC,
+ &SandboxClassExtension,
+ JS_NULL_OBJECT_OPS
+};
+
+// Note to whomever comes here to remove addProperty hooks: billm has promised
+// to do the work for this class.
+static const js::ClassOps SandboxWriteToProtoClassOps = {
+ sandbox_addProperty, nullptr, nullptr, nullptr,
+ JS_EnumerateStandardClasses, JS_ResolveStandardClass,
+ JS_MayResolveStandardClass,
+ sandbox_finalize,
+ nullptr, nullptr, nullptr, JS_GlobalObjectTraceHook,
+};
+
+static const js::Class SandboxWriteToProtoClass = {
+ "Sandbox",
+ XPCONNECT_GLOBAL_FLAGS_WITH_EXTRA_SLOTS(1) |
+ JSCLASS_FOREGROUND_FINALIZE,
+ &SandboxWriteToProtoClassOps,
+ JS_NULL_CLASS_SPEC,
+ &SandboxClassExtension,
+ JS_NULL_OBJECT_OPS
+};
+
+static const JSFunctionSpec SandboxFunctions[] = {
+ JS_FS("dump", SandboxDump, 1,0),
+ JS_FS("debug", SandboxDebug, 1,0),
+ JS_FS("importFunction", SandboxImport, 1,0),
+ JS_FS_END
+};
+
+bool
+xpc::IsSandbox(JSObject* obj)
+{
+ const js::Class* clasp = js::GetObjectClass(obj);
+ return clasp == &SandboxClass || clasp == &SandboxWriteToProtoClass;
+}
+
+/***************************************************************************/
+nsXPCComponents_utils_Sandbox::nsXPCComponents_utils_Sandbox()
+{
+}
+
+nsXPCComponents_utils_Sandbox::~nsXPCComponents_utils_Sandbox()
+{
+}
+
+NS_INTERFACE_MAP_BEGIN(nsXPCComponents_utils_Sandbox)
+ NS_INTERFACE_MAP_ENTRY(nsIXPCComponents_utils_Sandbox)
+ NS_INTERFACE_MAP_ENTRY(nsIXPCScriptable)
+ NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXPCComponents_utils_Sandbox)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_ADDREF(nsXPCComponents_utils_Sandbox)
+NS_IMPL_RELEASE(nsXPCComponents_utils_Sandbox)
+
+// We use the nsIXPScriptable macros to generate lots of stuff for us.
+#define XPC_MAP_CLASSNAME nsXPCComponents_utils_Sandbox
+#define XPC_MAP_QUOTED_CLASSNAME "nsXPCComponents_utils_Sandbox"
+#define XPC_MAP_WANT_CALL
+#define XPC_MAP_WANT_CONSTRUCT
+#define XPC_MAP_FLAGS 0
+#include "xpc_map_end.h" /* This #undef's the above. */
+
+const xpc::SandboxProxyHandler xpc::sandboxProxyHandler;
+
+bool
+xpc::IsSandboxPrototypeProxy(JSObject* obj)
+{
+ return js::IsProxy(obj) &&
+ js::GetProxyHandler(obj) == &xpc::sandboxProxyHandler;
+}
+
+bool
+xpc::SandboxCallableProxyHandler::call(JSContext* cx, JS::Handle<JSObject*> proxy,
+ const JS::CallArgs& args) const
+{
+ // We forward the call to our underlying callable.
+
+ // Get our SandboxProxyHandler proxy.
+ RootedObject sandboxProxy(cx, getSandboxProxy(proxy));
+ MOZ_ASSERT(js::IsProxy(sandboxProxy) &&
+ js::GetProxyHandler(sandboxProxy) == &xpc::sandboxProxyHandler);
+
+ // The global of the sandboxProxy is the sandbox global, and the
+ // target object is the original proto.
+ RootedObject sandboxGlobal(cx,
+ js::GetGlobalForObjectCrossCompartment(sandboxProxy));
+ MOZ_ASSERT(IsSandbox(sandboxGlobal));
+
+ // If our this object is the sandbox global, we call with this set to the
+ // original proto instead.
+ //
+ // There are two different ways we can compute |this|. If we use
+ // JS_THIS_VALUE, we'll get the bonafide |this| value as passed by the
+ // caller, which may be undefined if a global function was invoked without
+ // an explicit invocant. If we use JS_THIS or JS_THIS_OBJECT, the |this|
+ // in |vp| will be coerced to the global, which is not the correct
+ // behavior in ES5 strict mode. And we have no way to compute strictness
+ // here.
+ //
+ // The naive approach is simply to use JS_THIS_VALUE here. If |this| was
+ // explicit, we can remap it appropriately. If it was implicit, then we
+ // leave it as undefined, and let the callee sort it out. Since the callee
+ // is generally in the same compartment as its global (eg the Window's
+ // compartment, not the Sandbox's), the callee will generally compute the
+ // correct |this|.
+ //
+ // However, this breaks down in the Xray case. If the sandboxPrototype
+ // is an Xray wrapper, then we'll end up reifying the native methods in
+ // the Sandbox's scope, which means that they'll compute |this| to be the
+ // Sandbox, breaking old-style XPC_WN_CallMethod methods.
+ //
+ // Luckily, the intent of Xrays is to provide a vanilla view of a foreign
+ // DOM interface, which means that we don't care about script-enacted
+ // strictness in the prototype's home compartment. Indeed, since DOM
+ // methods are always non-strict, we can just assume non-strict semantics
+ // if the sandboxPrototype is an Xray Wrapper, which lets us appropriately
+ // remap |this|.
+ bool isXray = WrapperFactory::IsXrayWrapper(sandboxProxy);
+ RootedValue thisVal(cx, isXray ? args.computeThis(cx) : args.thisv());
+ if (thisVal == ObjectValue(*sandboxGlobal)) {
+ thisVal = ObjectValue(*js::GetProxyTargetObject(sandboxProxy));
+ }
+
+ RootedValue func(cx, js::GetProxyPrivate(proxy));
+ return JS::Call(cx, thisVal, func, args, args.rval());
+}
+
+const xpc::SandboxCallableProxyHandler xpc::sandboxCallableProxyHandler;
+
+/*
+ * Wrap a callable such that if we're called with oldThisObj as the
+ * "this" we will instead call it with newThisObj as the this.
+ */
+static JSObject*
+WrapCallable(JSContext* cx, HandleObject callable, HandleObject sandboxProtoProxy)
+{
+ MOZ_ASSERT(JS::IsCallable(callable));
+ // Our proxy is wrapping the callable. So we need to use the
+ // callable as the private. We put the given sandboxProtoProxy in
+ // an extra slot, and our call() hook depends on that.
+ MOZ_ASSERT(js::IsProxy(sandboxProtoProxy) &&
+ js::GetProxyHandler(sandboxProtoProxy) ==
+ &xpc::sandboxProxyHandler);
+
+ RootedValue priv(cx, ObjectValue(*callable));
+ // We want to claim to have the same proto as our wrapped callable, so set
+ // ourselves up with a lazy proto.
+ js::ProxyOptions options;
+ options.setLazyProto(true);
+ JSObject* obj = js::NewProxyObject(cx, &xpc::sandboxCallableProxyHandler,
+ priv, nullptr, options);
+ if (obj) {
+ js::SetProxyExtra(obj, SandboxCallableProxyHandler::SandboxProxySlot,
+ ObjectValue(*sandboxProtoProxy));
+ }
+
+ return obj;
+}
+
+template<typename Op>
+bool WrapAccessorFunction(JSContext* cx, Op& op, PropertyDescriptor* desc,
+ unsigned attrFlag, HandleObject sandboxProtoProxy)
+{
+ if (!op) {
+ return true;
+ }
+
+ if (!(desc->attrs & attrFlag)) {
+ XPCThrower::Throw(NS_ERROR_UNEXPECTED, cx);
+ return false;
+ }
+
+ RootedObject func(cx, JS_FUNC_TO_DATA_PTR(JSObject*, op));
+ func = WrapCallable(cx, func, sandboxProtoProxy);
+ if (!func)
+ return false;
+ op = JS_DATA_TO_FUNC_PTR(Op, func.get());
+ return true;
+}
+
+bool
+xpc::SandboxProxyHandler::getPropertyDescriptor(JSContext* cx,
+ JS::Handle<JSObject*> proxy,
+ JS::Handle<jsid> id,
+ JS::MutableHandle<PropertyDescriptor> desc) const
+{
+ JS::RootedObject obj(cx, wrappedObject(proxy));
+
+ MOZ_ASSERT(js::GetObjectCompartment(obj) == js::GetObjectCompartment(proxy));
+ if (!JS_GetPropertyDescriptorById(cx, obj, id, desc))
+ return false;
+
+ if (!desc.object())
+ return true; // No property, nothing to do
+
+ // Now fix up the getter/setter/value as needed to be bound to desc->obj.
+ if (!WrapAccessorFunction(cx, desc.getter(), desc.address(),
+ JSPROP_GETTER, proxy))
+ return false;
+ if (!WrapAccessorFunction(cx, desc.setter(), desc.address(),
+ JSPROP_SETTER, proxy))
+ return false;
+ if (desc.value().isObject()) {
+ RootedObject val (cx, &desc.value().toObject());
+ if (JS::IsCallable(val)) {
+ val = WrapCallable(cx, val, proxy);
+ if (!val)
+ return false;
+ desc.value().setObject(*val);
+ }
+ }
+
+ return true;
+}
+
+bool
+xpc::SandboxProxyHandler::getOwnPropertyDescriptor(JSContext* cx,
+ JS::Handle<JSObject*> proxy,
+ JS::Handle<jsid> id,
+ JS::MutableHandle<PropertyDescriptor> desc)
+ const
+{
+ if (!getPropertyDescriptor(cx, proxy, id, desc))
+ return false;
+
+ if (desc.object() != wrappedObject(proxy))
+ desc.object().set(nullptr);
+
+ return true;
+}
+
+/*
+ * Reuse the BaseProxyHandler versions of the derived traps that are implemented
+ * in terms of the fundamental traps.
+ */
+
+bool
+xpc::SandboxProxyHandler::has(JSContext* cx, JS::Handle<JSObject*> proxy,
+ JS::Handle<jsid> id, bool* bp) const
+{
+ // This uses getPropertyDescriptor for backward compatibility with
+ // the old BaseProxyHandler::has implementation.
+ Rooted<PropertyDescriptor> desc(cx);
+ if (!getPropertyDescriptor(cx, proxy, id, &desc))
+ return false;
+
+ *bp = !!desc.object();
+ return true;
+}
+bool
+xpc::SandboxProxyHandler::hasOwn(JSContext* cx, JS::Handle<JSObject*> proxy,
+ JS::Handle<jsid> id, bool* bp) const
+{
+ return BaseProxyHandler::hasOwn(cx, proxy, id, bp);
+}
+
+bool
+xpc::SandboxProxyHandler::get(JSContext* cx, JS::Handle<JSObject*> proxy,
+ JS::Handle<JS::Value> receiver,
+ JS::Handle<jsid> id,
+ JS::MutableHandle<Value> vp) const
+{
+ // This uses getPropertyDescriptor for backward compatibility with
+ // the old BaseProxyHandler::get implementation.
+ Rooted<PropertyDescriptor> desc(cx);
+ if (!getPropertyDescriptor(cx, proxy, id, &desc))
+ return false;
+ desc.assertCompleteIfFound();
+
+ if (!desc.object()) {
+ vp.setUndefined();
+ return true;
+ }
+
+ // Everything after here follows [[Get]] for ordinary objects.
+ if (desc.isDataDescriptor()) {
+ vp.set(desc.value());
+ return true;
+ }
+
+ MOZ_ASSERT(desc.isAccessorDescriptor());
+ RootedObject getter(cx, desc.getterObject());
+
+ if (!getter) {
+ vp.setUndefined();
+ return true;
+ }
+
+ return Call(cx, receiver, getter, HandleValueArray::empty(), vp);
+}
+
+bool
+xpc::SandboxProxyHandler::set(JSContext* cx, JS::Handle<JSObject*> proxy,
+ JS::Handle<jsid> id,
+ JS::Handle<Value> v,
+ JS::Handle<Value> receiver,
+ JS::ObjectOpResult& result) const
+{
+ return BaseProxyHandler::set(cx, proxy, id, v, receiver, result);
+}
+
+bool
+xpc::SandboxProxyHandler::getOwnEnumerablePropertyKeys(JSContext* cx,
+ JS::Handle<JSObject*> proxy,
+ AutoIdVector& props) const
+{
+ return BaseProxyHandler::getOwnEnumerablePropertyKeys(cx, proxy, props);
+}
+
+bool
+xpc::SandboxProxyHandler::enumerate(JSContext* cx, JS::Handle<JSObject*> proxy,
+ JS::MutableHandle<JSObject*> objp) const
+{
+ return BaseProxyHandler::enumerate(cx, proxy, objp);
+}
+
+bool
+xpc::GlobalProperties::Parse(JSContext* cx, JS::HandleObject obj)
+{
+ uint32_t length;
+ bool ok = JS_GetArrayLength(cx, obj, &length);
+ NS_ENSURE_TRUE(ok, false);
+ for (uint32_t i = 0; i < length; i++) {
+ RootedValue nameValue(cx);
+ ok = JS_GetElement(cx, obj, i, &nameValue);
+ NS_ENSURE_TRUE(ok, false);
+ if (!nameValue.isString()) {
+ JS_ReportErrorASCII(cx, "Property names must be strings");
+ return false;
+ }
+ RootedString nameStr(cx, nameValue.toString());
+ JSAutoByteString name;
+ if (!name.encodeUtf8(cx, nameStr))
+ return false;
+ if (!strcmp(name.ptr(), "CSS")) {
+ CSS = true;
+ } else if (!strcmp(name.ptr(), "indexedDB")) {
+ indexedDB = true;
+ } else if (!strcmp(name.ptr(), "XMLHttpRequest")) {
+ XMLHttpRequest = true;
+ } else if (!strcmp(name.ptr(), "TextEncoder")) {
+ TextEncoder = true;
+ } else if (!strcmp(name.ptr(), "TextDecoder")) {
+ TextDecoder = true;
+ } else if (!strcmp(name.ptr(), "URL")) {
+ URL = true;
+ } else if (!strcmp(name.ptr(), "URLSearchParams")) {
+ URLSearchParams = true;
+ } else if (!strcmp(name.ptr(), "atob")) {
+ atob = true;
+ } else if (!strcmp(name.ptr(), "btoa")) {
+ btoa = true;
+ } else if (!strcmp(name.ptr(), "Blob")) {
+ Blob = true;
+ } else if (!strcmp(name.ptr(), "Directory")) {
+ Directory = true;
+ } else if (!strcmp(name.ptr(), "File")) {
+ File = true;
+ } else if (!strcmp(name.ptr(), "crypto")) {
+ crypto = true;
+#ifdef MOZ_WEBRTC
+ } else if (!strcmp(name.ptr(), "rtcIdentityProvider")) {
+ rtcIdentityProvider = true;
+#endif
+ } else if (!strcmp(name.ptr(), "fetch")) {
+ fetch = true;
+ } else if (!strcmp(name.ptr(), "caches")) {
+ caches = true;
+ } else if (!strcmp(name.ptr(), "FileReader")) {
+ fileReader = true;
+ } else {
+ JS_ReportErrorUTF8(cx, "Unknown property name: %s", name.ptr());
+ return false;
+ }
+ }
+ return true;
+}
+
+bool
+xpc::GlobalProperties::Define(JSContext* cx, JS::HandleObject obj)
+{
+ MOZ_ASSERT(js::GetContextCompartment(cx) == js::GetObjectCompartment(obj));
+ // Properties will be exposed to System automatically but not to Sandboxes
+ // if |[Exposed=System]| is specified.
+ // This function holds common properties not exposed automatically but able
+ // to be requested either in |Cu.importGlobalProperties| or
+ // |wantGlobalProperties| of a sandbox.
+ if (CSS && !dom::CSSBinding::GetConstructorObject(cx))
+ return false;
+
+ if (XMLHttpRequest &&
+ !dom::XMLHttpRequestBinding::GetConstructorObject(cx))
+ return false;
+
+ if (TextEncoder &&
+ !dom::TextEncoderBinding::GetConstructorObject(cx))
+ return false;
+
+ if (TextDecoder &&
+ !dom::TextDecoderBinding::GetConstructorObject(cx))
+ return false;
+
+ if (URL &&
+ !dom::URLBinding::GetConstructorObject(cx))
+ return false;
+
+ if (URLSearchParams &&
+ !dom::URLSearchParamsBinding::GetConstructorObject(cx))
+ return false;
+
+ if (atob &&
+ !JS_DefineFunction(cx, obj, "atob", Atob, 1, 0))
+ return false;
+
+ if (btoa &&
+ !JS_DefineFunction(cx, obj, "btoa", Btoa, 1, 0))
+ return false;
+
+ if (Blob &&
+ !dom::BlobBinding::GetConstructorObject(cx))
+ return false;
+
+ if (Directory &&
+ !dom::DirectoryBinding::GetConstructorObject(cx))
+ return false;
+
+ if (File &&
+ !dom::FileBinding::GetConstructorObject(cx))
+ return false;
+
+ if (crypto && !SandboxCreateCrypto(cx, obj))
+ return false;
+
+#ifdef MOZ_WEBRTC
+ if (rtcIdentityProvider && !SandboxCreateRTCIdentityProvider(cx, obj))
+ return false;
+#endif
+
+ if (fetch && !SandboxCreateFetch(cx, obj))
+ return false;
+
+ if (caches && !dom::cache::CacheStorage::DefineCaches(cx, obj))
+ return false;
+
+ if (fileReader && !dom::FileReaderBinding::GetConstructorObject(cx))
+ return false;
+
+ return true;
+}
+
+bool
+xpc::GlobalProperties::DefineInXPCComponents(JSContext* cx, JS::HandleObject obj)
+{
+ if (indexedDB &&
+ !IndexedDatabaseManager::DefineIndexedDB(cx, obj))
+ return false;
+
+ return Define(cx, obj);
+}
+
+bool
+xpc::GlobalProperties::DefineInSandbox(JSContext* cx, JS::HandleObject obj)
+{
+ MOZ_ASSERT(IsSandbox(obj));
+ MOZ_ASSERT(js::GetContextCompartment(cx) == js::GetObjectCompartment(obj));
+
+ if (indexedDB &&
+ !(IndexedDatabaseManager::ResolveSandboxBinding(cx) &&
+ IndexedDatabaseManager::DefineIndexedDB(cx, obj)))
+ return false;
+
+ return Define(cx, obj);
+}
+
+nsresult
+xpc::CreateSandboxObject(JSContext* cx, MutableHandleValue vp, nsISupports* prinOrSop,
+ SandboxOptions& options)
+{
+ // Create the sandbox global object
+ nsCOMPtr<nsIPrincipal> principal = do_QueryInterface(prinOrSop);
+ if (!principal) {
+ nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(prinOrSop);
+ if (sop) {
+ principal = sop->GetPrincipal();
+ } else {
+ RefPtr<nsNullPrincipal> nullPrin = nsNullPrincipal::Create();
+ principal = nullPrin;
+ }
+ }
+ MOZ_ASSERT(principal);
+
+ JS::CompartmentOptions compartmentOptions;
+
+ auto& creationOptions = compartmentOptions.creationOptions();
+
+ // XXXjwatt: Consider whether/when sandboxes should be able to see
+ // [SecureContext] API (bug 1273687). In that case we'd call
+ // creationOptions.setSecureContext(true).
+
+ if (xpc::SharedMemoryEnabled())
+ creationOptions.setSharedMemoryAndAtomicsEnabled(true);
+
+ if (options.sameZoneAs)
+ creationOptions.setSameZoneAs(js::UncheckedUnwrap(options.sameZoneAs));
+ else if (options.freshZone)
+ creationOptions.setZone(JS::FreshZone);
+ else
+ creationOptions.setZone(JS::SystemZone);
+
+ creationOptions.setInvisibleToDebugger(options.invisibleToDebugger)
+ .setTrace(TraceXPCGlobal);
+
+ // Try to figure out any addon this sandbox should be associated with.
+ // The addon could have been passed in directly, as part of the metadata,
+ // or by being constructed from an addon's code.
+ JSAddonId* addonId = nullptr;
+ if (options.addonId) {
+ addonId = JS::NewAddonId(cx, options.addonId);
+ NS_ENSURE_TRUE(addonId, NS_ERROR_FAILURE);
+ } else if (JSObject* obj = JS::CurrentGlobalOrNull(cx)) {
+ if (JSAddonId* id = JS::AddonIdOfObject(obj))
+ addonId = id;
+ }
+
+ creationOptions.setAddonId(addonId);
+
+ compartmentOptions.behaviors().setDiscardSource(options.discardSource);
+
+ const js::Class* clasp = options.writeToGlobalPrototype
+ ? &SandboxWriteToProtoClass
+ : &SandboxClass;
+
+ RootedObject sandbox(cx, xpc::CreateGlobalObject(cx, js::Jsvalify(clasp),
+ principal, compartmentOptions));
+ if (!sandbox)
+ return NS_ERROR_FAILURE;
+
+ CompartmentPrivate* priv = CompartmentPrivate::Get(sandbox);
+ priv->allowWaivers = options.allowWaivers;
+ priv->writeToGlobalPrototype = options.writeToGlobalPrototype;
+ priv->isWebExtensionContentScript = options.isWebExtensionContentScript;
+ priv->waiveInterposition = options.waiveInterposition;
+
+ // Set up the wantXrays flag, which indicates whether xrays are desired even
+ // for same-origin access.
+ //
+ // This flag has historically been ignored for chrome sandboxes due to
+ // quirks in the wrapping implementation that have now been removed. Indeed,
+ // same-origin Xrays for chrome->chrome access seems a bit superfluous.
+ // Arguably we should just flip the default for chrome and still honor the
+ // flag, but such a change would break code in subtle ways for minimal
+ // benefit. So we just switch it off here.
+ priv->wantXrays =
+ AccessCheck::isChrome(sandbox) ? false : options.wantXrays;
+
+ {
+ JSAutoCompartment ac(cx, sandbox);
+
+ nsCOMPtr<nsIScriptObjectPrincipal> sbp =
+ new SandboxPrivate(principal, sandbox);
+
+ // Pass on ownership of sbp to |sandbox|.
+ JS_SetPrivate(sandbox, sbp.forget().take());
+
+ {
+ // Don't try to mirror standard class properties, if we're using a
+ // mirroring sandbox. (This is meaningless for non-mirroring
+ // sandboxes.)
+ AutoSkipPropertyMirroring askip(CompartmentPrivate::Get(sandbox));
+
+ // Ensure |Object.prototype| is instantiated before prototype-
+ // splicing below. For write-to-global-prototype behavior, extend
+ // this to all builtin properties.
+ if (options.writeToGlobalPrototype) {
+ if (!JS_EnumerateStandardClasses(cx, sandbox))
+ return NS_ERROR_XPC_UNEXPECTED;
+ } else {
+ if (!JS_GetObjectPrototype(cx, sandbox))
+ return NS_ERROR_XPC_UNEXPECTED;
+ }
+ }
+
+ if (options.proto) {
+ bool ok = JS_WrapObject(cx, &options.proto);
+ if (!ok)
+ return NS_ERROR_XPC_UNEXPECTED;
+
+ // Now check what sort of thing we've got in |proto|, and figure out
+ // if we need a SandboxProxyHandler.
+ //
+ // Note that, in the case of a window, we can't require that the
+ // Sandbox subsumes the prototype, because we have to hold our
+ // reference to it via an outer window, and the window may navigate
+ // at any time. So we have to handle that case separately.
+ bool useSandboxProxy = !!WindowOrNull(js::UncheckedUnwrap(options.proto, false));
+ if (!useSandboxProxy) {
+ JSObject* unwrappedProto = js::CheckedUnwrap(options.proto, false);
+ if (!unwrappedProto) {
+ JS_ReportErrorASCII(cx, "Sandbox must subsume sandboxPrototype");
+ return NS_ERROR_INVALID_ARG;
+ }
+ const js::Class* unwrappedClass = js::GetObjectClass(unwrappedProto);
+ useSandboxProxy = IS_WN_CLASS(unwrappedClass) ||
+ mozilla::dom::IsDOMClass(Jsvalify(unwrappedClass));
+ }
+
+ if (useSandboxProxy) {
+ // Wrap it up in a proxy that will do the right thing in terms
+ // of this-binding for methods.
+ RootedValue priv(cx, ObjectValue(*options.proto));
+ options.proto = js::NewProxyObject(cx, &xpc::sandboxProxyHandler,
+ priv, nullptr);
+ if (!options.proto)
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+
+ ok = JS_SplicePrototype(cx, sandbox, options.proto);
+ if (!ok)
+ return NS_ERROR_XPC_UNEXPECTED;
+ }
+
+ // Don't try to mirror the properties that are set below.
+ AutoSkipPropertyMirroring askip(CompartmentPrivate::Get(sandbox));
+
+ bool allowComponents = principal == nsXPConnect::SystemPrincipal() ||
+ nsContentUtils::IsExpandedPrincipal(principal);
+ if (options.wantComponents && allowComponents &&
+ !ObjectScope(sandbox)->AttachComponentsObject(cx))
+ return NS_ERROR_XPC_UNEXPECTED;
+
+ if (!XPCNativeWrapper::AttachNewConstructorObject(cx, sandbox))
+ return NS_ERROR_XPC_UNEXPECTED;
+
+ if (!JS_DefineFunctions(cx, sandbox, SandboxFunctions))
+ return NS_ERROR_XPC_UNEXPECTED;
+
+ if (options.wantExportHelpers &&
+ (!JS_DefineFunction(cx, sandbox, "exportFunction", SandboxExportFunction, 3, 0) ||
+ !JS_DefineFunction(cx, sandbox, "createObjectIn", SandboxCreateObjectIn, 2, 0) ||
+ !JS_DefineFunction(cx, sandbox, "cloneInto", SandboxCloneInto, 3, 0) ||
+ !JS_DefineFunction(cx, sandbox, "isProxy", SandboxIsProxy, 1, 0)))
+ return NS_ERROR_XPC_UNEXPECTED;
+
+ if (!options.globalProperties.DefineInSandbox(cx, sandbox))
+ return NS_ERROR_XPC_UNEXPECTED;
+
+#ifndef SPIDERMONKEY_PROMISE
+ // Promise is supposed to be part of ES, and therefore should appear on
+ // every global.
+ if (!dom::PromiseBinding::GetConstructorObject(cx))
+ return NS_ERROR_XPC_UNEXPECTED;
+#endif // SPIDERMONKEY_PROMISE
+ }
+
+ // We handle the case where the context isn't in a compartment for the
+ // benefit of InitSingletonScopes.
+ vp.setObject(*sandbox);
+ if (js::GetContextCompartment(cx) && !JS_WrapValue(cx, vp))
+ return NS_ERROR_UNEXPECTED;
+
+ // Set the location information for the new global, so that tools like
+ // about:memory may use that information
+ xpc::SetLocationForGlobal(sandbox, options.sandboxName);
+
+ xpc::SetSandboxMetadata(cx, sandbox, options.metadata);
+
+ JS_FireOnNewGlobalObject(cx, sandbox);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXPCComponents_utils_Sandbox::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_utils_Sandbox::Construct(nsIXPConnectWrappedNative* wrapper, JSContext* cx,
+ JSObject* objArg, const CallArgs& args, bool* _retval)
+{
+ RootedObject obj(cx, objArg);
+ return CallOrConstruct(wrapper, cx, obj, args, _retval);
+}
+
+/*
+ * For sandbox constructor the first argument can be a URI string in which case
+ * we use the related Codebase Principal for the sandbox.
+ */
+bool
+ParsePrincipal(JSContext* cx, HandleString codebase, const PrincipalOriginAttributes& aAttrs,
+ nsIPrincipal** principal)
+{
+ MOZ_ASSERT(principal);
+ MOZ_ASSERT(codebase);
+ nsCOMPtr<nsIURI> uri;
+ nsAutoJSString codebaseStr;
+ NS_ENSURE_TRUE(codebaseStr.init(cx, codebase), false);
+ nsresult rv = NS_NewURI(getter_AddRefs(uri), codebaseStr);
+ if (NS_FAILED(rv)) {
+ JS_ReportErrorASCII(cx, "Creating URI from string failed");
+ return false;
+ }
+
+ // We could allow passing in the app-id and browser-element info to the
+ // sandbox constructor. But creating a sandbox based on a string is a
+ // deprecated API so no need to add features to it.
+ nsCOMPtr<nsIPrincipal> prin =
+ BasePrincipal::CreateCodebasePrincipal(uri, aAttrs);
+ prin.forget(principal);
+
+ if (!*principal) {
+ JS_ReportErrorASCII(cx, "Creating Principal from URI failed");
+ return false;
+ }
+ return true;
+}
+
+/*
+ * For sandbox constructor the first argument can be a principal object or
+ * a script object principal (Document, Window).
+ */
+static bool
+GetPrincipalOrSOP(JSContext* cx, HandleObject from, nsISupports** out)
+{
+ MOZ_ASSERT(out);
+ *out = nullptr;
+
+ nsCOMPtr<nsISupports> native = xpc::UnwrapReflectorToISupports(from);
+
+ if (nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(native)) {
+ sop.forget(out);
+ return true;
+ }
+
+ nsCOMPtr<nsIPrincipal> principal = do_QueryInterface(native);
+ principal.forget(out);
+ NS_ENSURE_TRUE(*out, false);
+
+ return true;
+}
+
+/*
+ * The first parameter of the sandbox constructor might be an array of principals, either in string
+ * format or actual objects (see GetPrincipalOrSOP)
+ */
+static bool
+GetExpandedPrincipal(JSContext* cx, HandleObject arrayObj,
+ const SandboxOptions& options, nsIExpandedPrincipal** out)
+{
+ MOZ_ASSERT(out);
+ uint32_t length;
+
+ if (!JS_GetArrayLength(cx, arrayObj, &length))
+ return false;
+ if (!length) {
+ // We need a whitelist of principals or uri strings to create an
+ // expanded principal, if we got an empty array or something else
+ // report error.
+ JS_ReportErrorASCII(cx, "Expected an array of URI strings");
+ return false;
+ }
+
+ nsTArray< nsCOMPtr<nsIPrincipal> > allowedDomains(length);
+ allowedDomains.SetLength(length);
+
+ // If an originAttributes option has been specified, we will use that as the
+ // OriginAttribute of all of the string arguments passed to this function.
+ // Otherwise, we will use the OriginAttributes of a principal or SOP object
+ // in the array, if any. If no such object is present, and all we have are
+ // strings, then we will use a default OriginAttribute.
+ // Otherwise, we will use the origin attributes of the passed object(s). If
+ // more than one object is specified, we ensure that the OAs match.
+ Maybe<PrincipalOriginAttributes> attrs;
+ if (options.originAttributes) {
+ attrs.emplace();
+ JS::RootedValue val(cx, JS::ObjectValue(*options.originAttributes));
+ if (!attrs->Init(cx, val)) {
+ // The originAttributes option, if specified, must be valid!
+ JS_ReportErrorASCII(cx, "Expected a valid OriginAttributes object");
+ return false;
+ }
+ }
+
+ // Now we go over the array in two passes. In the first pass, we ignore
+ // strings, and only process objects. Assuming that no originAttributes
+ // option has been passed, if we encounter a principal or SOP object, we
+ // grab its OA and save it if it's the first OA encountered, otherwise
+ // check to make sure that it is the same as the OA found before.
+ // In the second pass, we ignore objects, and use the OA found in pass 0
+ // (or the previously computed OA if we have obtained it from the options)
+ // to construct codebase principals.
+ //
+ // The effective OA selected above will also be set as the OA of the
+ // expanded principal object.
+
+ // First pass:
+ for (uint32_t i = 0; i < length; ++i) {
+ RootedValue allowed(cx);
+ if (!JS_GetElement(cx, arrayObj, i, &allowed))
+ return false;
+
+ nsresult rv;
+ nsCOMPtr<nsIPrincipal> principal;
+ if (allowed.isObject()) {
+ // In case of object let's see if it's a Principal or a ScriptObjectPrincipal.
+ nsCOMPtr<nsISupports> prinOrSop;
+ RootedObject obj(cx, &allowed.toObject());
+ if (!GetPrincipalOrSOP(cx, obj, getter_AddRefs(prinOrSop)))
+ return false;
+
+ nsCOMPtr<nsIScriptObjectPrincipal> sop(do_QueryInterface(prinOrSop));
+ principal = do_QueryInterface(prinOrSop);
+ if (sop)
+ principal = sop->GetPrincipal();
+ NS_ENSURE_TRUE(principal, false);
+
+ if (!options.originAttributes) {
+ const PrincipalOriginAttributes prinAttrs =
+ BasePrincipal::Cast(principal)->OriginAttributesRef();
+ if (attrs.isNothing()) {
+ attrs.emplace(prinAttrs);
+ } else if (prinAttrs != attrs.ref()) {
+ // If attrs is from a previously encountered principal in the
+ // array, we need to ensure that it matches the OA of the
+ // principal we have here.
+ // If attrs comes from OriginAttributes, we don't need
+ // this check.
+ return false;
+ }
+ }
+
+ // We do not allow ExpandedPrincipals to contain any system principals.
+ bool isSystem;
+ rv = nsXPConnect::SecurityManager()->IsSystemPrincipal(principal, &isSystem);
+ NS_ENSURE_SUCCESS(rv, false);
+ if (isSystem) {
+ JS_ReportErrorASCII(cx, "System principal is not allowed in an expanded principal");
+ return false;
+ }
+ allowedDomains[i] = principal;
+ } else if (allowed.isString()) {
+ // Skip any string arguments - we handle them in the next pass.
+ } else {
+ // Don't know what this is.
+ return false;
+ }
+ }
+
+ if (attrs.isNothing()) {
+ // If no OriginAttributes was found in the first pass, fall back to a default one.
+ attrs.emplace();
+ }
+
+ // Second pass:
+ for (uint32_t i = 0; i < length; ++i) {
+ RootedValue allowed(cx);
+ if (!JS_GetElement(cx, arrayObj, i, &allowed))
+ return false;
+
+ nsCOMPtr<nsIPrincipal> principal;
+ if (allowed.isString()) {
+ // In case of string let's try to fetch a codebase principal from it.
+ RootedString str(cx, allowed.toString());
+
+ // attrs here is either a default OriginAttributes in case the
+ // originAttributes option isn't specified, and no object in the array
+ // provides a principal. Otherwise it's either the forced principal, or
+ // the principal found before, so we can use it here.
+ if (!ParsePrincipal(cx, str, attrs.ref(), getter_AddRefs(principal)))
+ return false;
+ NS_ENSURE_TRUE(principal, false);
+ allowedDomains[i] = principal;
+ } else {
+ MOZ_ASSERT(allowed.isObject());
+ }
+ }
+
+ nsCOMPtr<nsIExpandedPrincipal> result =
+ new nsExpandedPrincipal(allowedDomains, attrs.ref());
+ result.forget(out);
+ return true;
+}
+
+/*
+ * Helper that tries to get a property from the options object.
+ */
+bool
+OptionsBase::ParseValue(const char* name, MutableHandleValue prop, bool* aFound)
+{
+ bool found;
+ bool ok = JS_HasProperty(mCx, mObject, name, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (aFound)
+ *aFound = found;
+
+ if (!found)
+ return true;
+
+ return JS_GetProperty(mCx, mObject, name, prop);
+}
+
+/*
+ * Helper that tries to get a boolean property from the options object.
+ */
+bool
+OptionsBase::ParseBoolean(const char* name, bool* prop)
+{
+ MOZ_ASSERT(prop);
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue(name, &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (!found)
+ return true;
+
+ if (!value.isBoolean()) {
+ JS_ReportErrorASCII(mCx, "Expected a boolean value for property %s", name);
+ return false;
+ }
+
+ *prop = value.toBoolean();
+ return true;
+}
+
+/*
+ * Helper that tries to get an object property from the options object.
+ */
+bool
+OptionsBase::ParseObject(const char* name, MutableHandleObject prop)
+{
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue(name, &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (!found)
+ return true;
+
+ if (!value.isObject()) {
+ JS_ReportErrorASCII(mCx, "Expected an object value for property %s", name);
+ return false;
+ }
+ prop.set(&value.toObject());
+ return true;
+}
+
+/*
+ * Helper that tries to get an object property from the options object.
+ */
+bool
+OptionsBase::ParseJSString(const char* name, MutableHandleString prop)
+{
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue(name, &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (!found)
+ return true;
+
+ if (!value.isString()) {
+ JS_ReportErrorASCII(mCx, "Expected a string value for property %s", name);
+ return false;
+ }
+ prop.set(value.toString());
+ return true;
+}
+
+/*
+ * Helper that tries to get a string property from the options object.
+ */
+bool
+OptionsBase::ParseString(const char* name, nsCString& prop)
+{
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue(name, &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (!found)
+ return true;
+
+ if (!value.isString()) {
+ JS_ReportErrorASCII(mCx, "Expected a string value for property %s", name);
+ return false;
+ }
+
+ char* tmp = JS_EncodeString(mCx, value.toString());
+ NS_ENSURE_TRUE(tmp, false);
+ prop.Assign(tmp, strlen(tmp));
+ js_free(tmp);
+ return true;
+}
+
+/*
+ * Helper that tries to get a string property from the options object.
+ */
+bool
+OptionsBase::ParseString(const char* name, nsString& prop)
+{
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue(name, &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (!found)
+ return true;
+
+ if (!value.isString()) {
+ JS_ReportErrorASCII(mCx, "Expected a string value for property %s", name);
+ return false;
+ }
+
+ nsAutoJSString strVal;
+ if (!strVal.init(mCx, value.toString()))
+ return false;
+
+ prop = strVal;
+ return true;
+}
+
+/*
+ * Helper that tries to get jsid property from the options object.
+ */
+bool
+OptionsBase::ParseId(const char* name, MutableHandleId prop)
+{
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue(name, &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (!found)
+ return true;
+
+ return JS_ValueToId(mCx, value, prop);
+}
+
+/*
+ * Helper that tries to get a uint32_t property from the options object.
+ */
+bool
+OptionsBase::ParseUInt32(const char* name, uint32_t* prop)
+{
+ MOZ_ASSERT(prop);
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue(name, &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+
+ if (!found)
+ return true;
+
+ if(!JS::ToUint32(mCx, value, prop)) {
+ JS_ReportErrorASCII(mCx, "Expected a uint32_t value for property %s", name);
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ * Helper that tries to get a list of DOM constructors and other helpers from the options object.
+ */
+bool
+SandboxOptions::ParseGlobalProperties()
+{
+ RootedValue value(mCx);
+ bool found;
+ bool ok = ParseValue("wantGlobalProperties", &value, &found);
+ NS_ENSURE_TRUE(ok, false);
+ if (!found)
+ return true;
+
+ if (!value.isObject()) {
+ JS_ReportErrorASCII(mCx, "Expected an array value for wantGlobalProperties");
+ return false;
+ }
+
+ RootedObject ctors(mCx, &value.toObject());
+ bool isArray;
+ if (!JS_IsArrayObject(mCx, ctors, &isArray))
+ return false;
+ if (!isArray) {
+ JS_ReportErrorASCII(mCx, "Expected an array value for wantGlobalProperties");
+ return false;
+ }
+
+ return globalProperties.Parse(mCx, ctors);
+}
+
+/*
+ * Helper that parsing the sandbox options object (from) and sets the fields of the incoming options struct (options).
+ */
+bool
+SandboxOptions::Parse()
+{
+ /* All option names must be ASCII-only. */
+ bool ok = ParseObject("sandboxPrototype", &proto) &&
+ ParseBoolean("wantXrays", &wantXrays) &&
+ ParseBoolean("allowWaivers", &allowWaivers) &&
+ ParseBoolean("wantComponents", &wantComponents) &&
+ ParseBoolean("wantExportHelpers", &wantExportHelpers) &&
+ ParseBoolean("isWebExtensionContentScript", &isWebExtensionContentScript) &&
+ ParseBoolean("waiveInterposition", &waiveInterposition) &&
+ ParseString("sandboxName", sandboxName) &&
+ ParseObject("sameZoneAs", &sameZoneAs) &&
+ ParseBoolean("freshZone", &freshZone) &&
+ ParseBoolean("invisibleToDebugger", &invisibleToDebugger) &&
+ ParseBoolean("discardSource", &discardSource) &&
+ ParseJSString("addonId", &addonId) &&
+ ParseBoolean("writeToGlobalPrototype", &writeToGlobalPrototype) &&
+ ParseGlobalProperties() &&
+ ParseValue("metadata", &metadata) &&
+ ParseUInt32("userContextId", &userContextId) &&
+ ParseObject("originAttributes", &originAttributes);
+ if (!ok)
+ return false;
+
+ if (freshZone && sameZoneAs) {
+ JS_ReportErrorASCII(mCx, "Cannot use both sameZoneAs and freshZone");
+ return false;
+ }
+
+ return true;
+}
+
+static nsresult
+AssembleSandboxMemoryReporterName(JSContext* cx, nsCString& sandboxName)
+{
+ // Use a default name when the caller did not provide a sandboxName.
+ if (sandboxName.IsEmpty())
+ sandboxName = NS_LITERAL_CSTRING("[anonymous sandbox]");
+
+ nsXPConnect* xpc = nsXPConnect::XPConnect();
+ // Get the xpconnect native call context.
+ nsAXPCNativeCallContext* cc = nullptr;
+ xpc->GetCurrentNativeCallContext(&cc);
+ NS_ENSURE_TRUE(cc, NS_ERROR_INVALID_ARG);
+
+ // Get the current source info from xpc.
+ nsCOMPtr<nsIStackFrame> frame;
+ xpc->GetCurrentJSStack(getter_AddRefs(frame));
+
+ // Append the caller's location information.
+ if (frame) {
+ nsString location;
+ int32_t lineNumber = 0;
+ frame->GetFilename(cx, location);
+ frame->GetLineNumber(cx, &lineNumber);
+
+ sandboxName.AppendLiteral(" (from: ");
+ sandboxName.Append(NS_ConvertUTF16toUTF8(location));
+ sandboxName.Append(':');
+ sandboxName.AppendInt(lineNumber);
+ sandboxName.Append(')');
+ }
+
+ return NS_OK;
+}
+
+// static
+nsresult
+nsXPCComponents_utils_Sandbox::CallOrConstruct(nsIXPConnectWrappedNative* wrapper,
+ JSContext* cx, HandleObject obj,
+ const CallArgs& args, bool* _retval)
+{
+ if (args.length() < 1)
+ return ThrowAndFail(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx, _retval);
+
+ nsresult rv;
+ bool ok = false;
+ bool calledWithOptions = args.length() > 1;
+ if (calledWithOptions && !args[1].isObject())
+ return ThrowAndFail(NS_ERROR_INVALID_ARG, cx, _retval);
+
+ RootedObject optionsObject(cx, calledWithOptions ? &args[1].toObject()
+ : nullptr);
+
+ SandboxOptions options(cx, optionsObject);
+ if (calledWithOptions && !options.Parse())
+ return ThrowAndFail(NS_ERROR_INVALID_ARG, cx, _retval);
+
+ // Make sure to set up principals on the sandbox before initing classes.
+ nsCOMPtr<nsIPrincipal> principal;
+ nsCOMPtr<nsIExpandedPrincipal> expanded;
+ nsCOMPtr<nsISupports> prinOrSop;
+
+ if (args[0].isString()) {
+ RootedString str(cx, args[0].toString());
+ PrincipalOriginAttributes attrs;
+ if (options.originAttributes) {
+ JS::RootedValue val(cx, JS::ObjectValue(*options.originAttributes));
+ if (!attrs.Init(cx, val)) {
+ // The originAttributes option, if specified, must be valid!
+ JS_ReportErrorASCII(cx, "Expected a valid OriginAttributes object");
+ return ThrowAndFail(NS_ERROR_INVALID_ARG, cx, _retval);
+ }
+ }
+ attrs.mUserContextId = options.userContextId;
+ ok = ParsePrincipal(cx, str, attrs, getter_AddRefs(principal));
+ prinOrSop = principal;
+ } else if (args[0].isObject()) {
+ RootedObject obj(cx, &args[0].toObject());
+ bool isArray;
+ if (!JS_IsArrayObject(cx, obj, &isArray)) {
+ ok = false;
+ } else if (isArray) {
+ if (options.userContextId != 0) {
+ // We don't support passing a userContextId with an array.
+ ok = false;
+ } else {
+ ok = GetExpandedPrincipal(cx, obj, options, getter_AddRefs(expanded));
+ prinOrSop = expanded;
+ }
+ } else {
+ ok = GetPrincipalOrSOP(cx, obj, getter_AddRefs(prinOrSop));
+ }
+ } else if (args[0].isNull()) {
+ // Null means that we just pass prinOrSop = nullptr, and get an
+ // nsNullPrincipal.
+ ok = true;
+ }
+
+ if (!ok)
+ return ThrowAndFail(NS_ERROR_INVALID_ARG, cx, _retval);
+
+
+ if (NS_FAILED(AssembleSandboxMemoryReporterName(cx, options.sandboxName)))
+ return ThrowAndFail(NS_ERROR_INVALID_ARG, cx, _retval);
+
+ if (options.metadata.isNullOrUndefined()) {
+ // If the caller is running in a sandbox, inherit.
+ RootedObject callerGlobal(cx, CurrentGlobalOrNull(cx));
+ if (IsSandbox(callerGlobal)) {
+ rv = GetSandboxMetadata(cx, callerGlobal, &options.metadata);
+ if (NS_WARN_IF(NS_FAILED(rv)))
+ return rv;
+ }
+ }
+
+ rv = CreateSandboxObject(cx, args.rval(), prinOrSop, options);
+
+ if (NS_FAILED(rv))
+ return ThrowAndFail(rv, cx, _retval);
+
+ // We have this crazy behavior where wantXrays=false also implies that the
+ // returned sandbox is implicitly waived. We've stopped advertising it, but
+ // keep supporting it for now.
+ if (!options.wantXrays && !xpc::WrapperFactory::WaiveXrayAndWrap(cx, args.rval()))
+ return NS_ERROR_UNEXPECTED;
+
+ *_retval = true;
+ return NS_OK;
+}
+
+nsresult
+xpc::EvalInSandbox(JSContext* cx, HandleObject sandboxArg, const nsAString& source,
+ const nsACString& filename, int32_t lineNo,
+ JSVersion jsVersion, MutableHandleValue rval)
+{
+ JS_AbortIfWrongThread(cx);
+ rval.set(UndefinedValue());
+
+ bool waiveXray = xpc::WrapperFactory::HasWaiveXrayFlag(sandboxArg);
+ RootedObject sandbox(cx, js::CheckedUnwrap(sandboxArg));
+ if (!sandbox || !IsSandbox(sandbox)) {
+ return NS_ERROR_INVALID_ARG;
+ }
+
+ nsIScriptObjectPrincipal* sop =
+ static_cast<nsIScriptObjectPrincipal*>(xpc_GetJSPrivate(sandbox));
+ MOZ_ASSERT(sop, "Invalid sandbox passed");
+ SandboxPrivate* priv = static_cast<SandboxPrivate*>(sop);
+ nsCOMPtr<nsIPrincipal> prin = sop->GetPrincipal();
+ NS_ENSURE_TRUE(prin, NS_ERROR_FAILURE);
+
+ nsAutoCString filenameBuf;
+ if (!filename.IsVoid() && filename.Length() != 0) {
+ filenameBuf.Assign(filename);
+ } else {
+ // Default to the spec of the principal.
+ nsresult rv = nsJSPrincipals::get(prin)->GetScriptLocation(filenameBuf);
+ NS_ENSURE_SUCCESS(rv, rv);
+ lineNo = 1;
+ }
+
+ // We create a separate cx to do the sandbox evaluation. Scope it.
+ RootedValue v(cx, UndefinedValue());
+ RootedValue exn(cx, UndefinedValue());
+ bool ok = true;
+ {
+ // We're about to evaluate script, so make an AutoEntryScript.
+ // This is clearly Gecko-specific and not in any spec.
+ mozilla::dom::AutoEntryScript aes(priv, "XPConnect sandbox evaluation");
+ JSContext* sandcx = aes.cx();
+ JSAutoCompartment ac(sandcx, sandbox);
+
+ JS::CompileOptions options(sandcx);
+ options.setFileAndLine(filenameBuf.get(), lineNo)
+ .setVersion(jsVersion);
+ MOZ_ASSERT(JS_IsGlobalObject(sandbox));
+ ok = JS::Evaluate(sandcx, options,
+ PromiseFlatString(source).get(), source.Length(), &v);
+
+ // If the sandbox threw an exception, grab it off the context.
+ if (aes.HasException()) {
+ if (!aes.StealException(&exn)) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ }
+ }
+
+ //
+ // Alright, we're back on the caller's cx. If an error occured, try to
+ // wrap and set the exception. Otherwise, wrap the return value.
+ //
+
+ if (!ok) {
+ // If we end up without an exception, it was probably due to OOM along
+ // the way, in which case we thow. Otherwise, wrap it.
+ if (exn.isUndefined() || !JS_WrapValue(cx, &exn))
+ return NS_ERROR_OUT_OF_MEMORY;
+
+ // Set the exception on our caller's cx.
+ JS_SetPendingException(cx, exn);
+ return NS_ERROR_FAILURE;
+ }
+
+ // Transitively apply Xray waivers if |sb| was waived.
+ if (waiveXray) {
+ ok = xpc::WrapperFactory::WaiveXrayAndWrap(cx, &v);
+ } else {
+ ok = JS_WrapValue(cx, &v);
+ }
+ NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);
+
+ // Whew!
+ rval.set(v);
+ return NS_OK;
+}
+
+nsresult
+xpc::GetSandboxAddonId(JSContext* cx, HandleObject sandbox, MutableHandleValue rval)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_ASSERT(IsSandbox(sandbox));
+
+ JSAddonId* id = JS::AddonIdOfObject(sandbox);
+ if (!id) {
+ rval.setNull();
+ return NS_OK;
+ }
+
+ JS::RootedValue idStr(cx, StringValue(JS::StringOfAddonId(id)));
+ if (!JS_WrapValue(cx, &idStr))
+ return NS_ERROR_UNEXPECTED;
+
+ rval.set(idStr);
+ return NS_OK;
+}
+
+nsresult
+xpc::GetSandboxMetadata(JSContext* cx, HandleObject sandbox, MutableHandleValue rval)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_ASSERT(IsSandbox(sandbox));
+
+ RootedValue metadata(cx);
+ {
+ JSAutoCompartment ac(cx, sandbox);
+ metadata = JS_GetReservedSlot(sandbox, XPCONNECT_SANDBOX_CLASS_METADATA_SLOT);
+ }
+
+ if (!JS_WrapValue(cx, &metadata))
+ return NS_ERROR_UNEXPECTED;
+
+ rval.set(metadata);
+ return NS_OK;
+}
+
+nsresult
+xpc::SetSandboxMetadata(JSContext* cx, HandleObject sandbox, HandleValue metadataArg)
+{
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_ASSERT(IsSandbox(sandbox));
+
+ RootedValue metadata(cx);
+
+ JSAutoCompartment ac(cx, sandbox);
+ if (!JS_StructuredClone(cx, metadataArg, &metadata, nullptr, nullptr))
+ return NS_ERROR_UNEXPECTED;
+
+ JS_SetReservedSlot(sandbox, XPCONNECT_SANDBOX_CLASS_METADATA_SLOT, metadata);
+
+ return NS_OK;
+}