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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
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tree10027f336435511475e392454359edea8e25895d /js/xpconnect/wrappers/WrapperFactory.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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+/* -*- 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/. */
+
+#ifndef _xpc_WRAPPERFACTORY_H
+#define _xpc_WRAPPERFACTORY_H
+
+#include "jswrapper.h"
+
+namespace xpc {
+
+class WrapperFactory {
+ public:
+ enum { WAIVE_XRAY_WRAPPER_FLAG = js::Wrapper::LAST_USED_FLAG << 1,
+ IS_XRAY_WRAPPER_FLAG = WAIVE_XRAY_WRAPPER_FLAG << 1 };
+
+ // Return true if any of any of the nested wrappers have the flag set.
+ static bool HasWrapperFlag(JSObject* wrapper, unsigned flag) {
+ unsigned flags = 0;
+ js::UncheckedUnwrap(wrapper, true, &flags);
+ return !!(flags & flag);
+ }
+
+ static bool IsXrayWrapper(JSObject* wrapper) {
+ return HasWrapperFlag(wrapper, IS_XRAY_WRAPPER_FLAG);
+ }
+
+ static bool HasWaiveXrayFlag(JSObject* wrapper) {
+ return HasWrapperFlag(wrapper, WAIVE_XRAY_WRAPPER_FLAG);
+ }
+
+ static bool IsCOW(JSObject* wrapper);
+
+ static JSObject* GetXrayWaiver(JS::HandleObject obj);
+ static JSObject* CreateXrayWaiver(JSContext* cx, JS::HandleObject obj);
+ static JSObject* WaiveXray(JSContext* cx, JSObject* obj);
+
+ // Computes whether we should allow the creation of an Xray waiver from
+ // |target| to |origin|.
+ static bool AllowWaiver(JSCompartment* target, JSCompartment* origin);
+
+ // Convenience method for the above, operating on a wrapper.
+ static bool AllowWaiver(JSObject* wrapper);
+
+ // Prepare a given object for wrapping in a new compartment.
+ static void PrepareForWrapping(JSContext* cx,
+ JS::HandleObject scope,
+ JS::HandleObject obj,
+ JS::HandleObject objectPassedToWrap,
+ JS::MutableHandleObject retObj);
+
+ // Rewrap an object that is about to cross compartment boundaries.
+ static JSObject* Rewrap(JSContext* cx,
+ JS::HandleObject existing,
+ JS::HandleObject obj);
+
+ // Wrap wrapped object into a waiver wrapper and then re-wrap it.
+ static bool WaiveXrayAndWrap(JSContext* cx, JS::MutableHandleValue vp);
+ static bool WaiveXrayAndWrap(JSContext* cx, JS::MutableHandleObject object);
+};
+
+extern const js::Wrapper XrayWaiver;
+
+} // namespace xpc
+
+#endif /* _xpc_WRAPPERFACTORY_H */