1 files changed, 64 insertions, 0 deletions
diff --git a/dom/bindings/Exceptions.h b/dom/bindings/Exceptions.h
new file mode 100644
index 0000000000..19084aee2f
--- /dev/null
+++ b/dom/bindings/Exceptions.h
@@ -0,0 +1,64 @@
+/* -*- 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 mozilla_dom_Exceptions_h__
+#define mozilla_dom_Exceptions_h__
+
+// DOM exception throwing machinery (for both main thread and workers).
+
+#include <stdint.h>
+#include "jspubtd.h"
+#include "nsString.h"
+#include "jsapi.h"
+
+class nsIStackFrame;
+class nsPIDOMWindowInner;
+template <class T>
+struct already_AddRefed;
+
+namespace mozilla::dom {
+
+class Exception;
+
+// If we're throwing a DOMException and message is empty, the default
+// message for the nsresult in question will be used.
+bool Throw(JSContext* cx, nsresult rv, const nsACString& message = ""_ns);
+
+// Create, throw and report an exception to a given window.
+void ThrowAndReport(nsPIDOMWindowInner* aWindow, nsresult aRv);
+
+// Both signatures of ThrowExceptionObject guarantee that an exception is set on
+// aCx before they return.
+void ThrowExceptionObject(JSContext* aCx, Exception* aException);
+
+// Create an exception object for the given nsresult and message. If we're
+// throwing a DOMException and aMessage is empty, the default message for the
+// nsresult in question will be used.
+//
+// This never returns null.
+already_AddRefed<Exception> CreateException(nsresult aRv,
+                                            const nsACString& aMessage = ""_ns);
+
+// aMaxDepth can be used to define a maximal depth for the stack trace. If the
+// value is -1, a default maximal depth will be selected.  Will return null if
+// there is no JS stack right now.
+already_AddRefed<nsIStackFrame> GetCurrentJSStack(int32_t aMaxDepth = -1);
+
+// Internal stuff not intended to be widely used.
+namespace exceptions {
+
+already_AddRefed<nsIStackFrame> CreateStack(JSContext* aCx,
+                                            JS::StackCapture&& aCaptureMode);
+
+// Like the above, but creates a JSStackFrame wrapper for an existing
+// JS::SavedFrame object, passed as aStack.
+already_AddRefed<nsIStackFrame> CreateStack(JSContext* aCx,
+                                            JS::Handle<JSObject*> aStack);
+
+}  // namespace exceptions
+}  // namespace mozilla::dom
+
+#endif