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/* -*- 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
/*
* JIT info so SpiderMonkey can efficiently work with Gecko XrayWrapper
* instances.
*
* This header is completely irrelevant to non-Gecko embedders.
*/
#ifndef js_friend_XrayJitInfo_h
#define js_friend_XrayJitInfo_h
#include <stddef.h> // size_t
#include "jstypes.h" // JS_PUBLIC_API
class JS_PUBLIC_API JSObject;
namespace js {
class JS_PUBLIC_API BaseProxyHandler;
} // namespace js
namespace JS {
// Callbacks and other information for use by the JITs when optimizing accesses
// on xray wrappers.
struct XrayJitInfo {
// Test whether a proxy handler is a cross compartment xray with no
// security checks.
bool (*isCrossCompartmentXray)(const js::BaseProxyHandler* handler);
// Test whether xrays in |obj|'s compartment have expandos of their own,
// instead of sharing them with Xrays from other compartments.
bool (*compartmentHasExclusiveExpandos)(JSObject* obj);
// Proxy reserved slot used by xrays in sandboxes to store their holder
// object.
size_t xrayHolderSlot;
// Reserved slot used by xray holders to store the xray's expando object.
size_t holderExpandoSlot;
// Reserved slot used by xray expandos to store a custom prototype.
size_t expandoProtoSlot;
};
extern JS_PUBLIC_API void SetXrayJitInfo(XrayJitInfo* info);
} // namespace JS
#endif // js_friend_XrayJitInfo_h