1 files changed, 94 insertions, 0 deletions
diff --git a/js/xpconnect/src/BackstagePass.h b/js/xpconnect/src/BackstagePass.h
new file mode 100644
index 0000000000..1e6c5531eb
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+++ b/js/xpconnect/src/BackstagePass.h
@@ -0,0 +1,94 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef BackstagePass_h__
+#define BackstagePass_h__
+
+#include "js/loader/ModuleLoaderBase.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/SchedulerGroup.h"
+#include "mozilla/StorageAccess.h"
+#include "nsISupports.h"
+#include "nsWeakReference.h"
+#include "nsIGlobalObject.h"
+#include "nsIScriptObjectPrincipal.h"
+#include "nsIXPCScriptable.h"
+
+#include "js/HeapAPI.h"
+
+class XPCWrappedNative;
+
+class BackstagePass final : public nsIGlobalObject,
+                            public nsIScriptObjectPrincipal,
+                            public nsIXPCScriptable,
+                            public nsIClassInfo,
+                            public nsSupportsWeakReference {
+ public:
+  BackstagePass();
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCSCRIPTABLE
+  NS_DECL_NSICLASSINFO
+
+  using ModuleLoaderBase = JS::loader::ModuleLoaderBase;
+
+  nsIPrincipal* GetPrincipal() override { return mPrincipal; }
+
+  nsIPrincipal* GetEffectiveCookiePrincipal() override { return mPrincipal; }
+
+  nsIPrincipal* GetEffectiveStoragePrincipal() override { return mPrincipal; }
+
+  nsIPrincipal* PartitionedPrincipal() override { return mPrincipal; }
+
+  mozilla::OriginTrials Trials() const override { return {}; }
+
+  JSObject* GetGlobalJSObject() override;
+  JSObject* GetGlobalJSObjectPreserveColor() const override;
+
+  ModuleLoaderBase* GetModuleLoader(JSContext* aCx) override {
+    return mModuleLoader;
+  }
+
+  mozilla::StorageAccess GetStorageAccess() final {
+    MOZ_ASSERT(NS_IsMainThread());
+    return mozilla::StorageAccess::eAllow;
+  }
+
+  mozilla::Result<mozilla::ipc::PrincipalInfo, nsresult> GetStorageKey()
+      override;
+
+  void ForgetGlobalObject() { mWrapper = nullptr; }
+
+  void SetGlobalObject(JSObject* global);
+
+  void InitModuleLoader(ModuleLoaderBase* aModuleLoader) {
+    MOZ_ASSERT(!mModuleLoader);
+    mModuleLoader = aModuleLoader;
+  }
+
+  nsISerialEventTarget* SerialEventTarget() const final {
+    return mozilla::GetMainThreadSerialEventTarget();
+  }
+  nsresult Dispatch(already_AddRefed<nsIRunnable>&& aRunnable) const final {
+    return mozilla::SchedulerGroup::Dispatch(std::move(aRunnable));
+  }
+
+  bool ShouldResistFingerprinting(RFPTarget aTarget) const override {
+    // BackstagePass is always the System Principal
+    MOZ_RELEASE_ASSERT(mPrincipal->IsSystemPrincipal());
+    return false;
+  }
+
+ private:
+  virtual ~BackstagePass() = default;
+
+  nsCOMPtr<nsIPrincipal> mPrincipal;
+  XPCWrappedNative* mWrapper;
+
+  RefPtr<JS::loader::ModuleLoaderBase> mModuleLoader;
+};
+
+#endif  // BackstagePass_h__