57 lines
1.6 KiB
C++
57 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: set ts=8 sts=2 et sw=2 tw=80:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* JIT info so SpiderMonkey can efficiently work with Gecko XrayWrapper
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* instances.
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*
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* This header is completely irrelevant to non-Gecko embedders.
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*/
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#ifndef js_friend_XrayJitInfo_h
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#define js_friend_XrayJitInfo_h
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#include <stddef.h> // size_t
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#include "jstypes.h" // JS_PUBLIC_API
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class JS_PUBLIC_API JSObject;
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namespace js {
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class JS_PUBLIC_API BaseProxyHandler;
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} // namespace js
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namespace JS {
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// Callbacks and other information for use by the JITs when optimizing accesses
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// on xray wrappers.
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struct XrayJitInfo {
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// Test whether a proxy handler is a cross compartment xray with no
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// security checks.
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bool (*isCrossCompartmentXray)(const js::BaseProxyHandler* handler);
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// Test whether xrays in |obj|'s compartment have expandos of their own,
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// instead of sharing them with Xrays from other compartments.
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bool (*compartmentHasExclusiveExpandos)(JSObject* obj);
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// Proxy reserved slot used by xrays in sandboxes to store their holder
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// object.
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size_t xrayHolderSlot;
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// Reserved slot used by xray holders to store the xray's expando object.
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size_t holderExpandoSlot;
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// Reserved slot used by xray expandos to store a custom prototype.
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size_t expandoProtoSlot;
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};
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extern JS_PUBLIC_API void SetXrayJitInfo(XrayJitInfo* info);
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} // namespace JS
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#endif // js_friend_XrayJitInfo_h
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