/* 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 jit_ShapeList_h
#define jit_ShapeList_h
#include <stddef.h>
#include <stdint.h>
#include "jstypes.h"
#include "js/Class.h"
#include "vm/List.h"
namespace js::jit {
// Special object used for storing a list of shapes to guard against. These are
// only used in the fields of CacheIR stubs and do not escape.
class ShapeListObject : public ListObject {
public:
static const JSClass class_;
static const JSClassOps classOps_;
static constexpr size_t MaxLength =
16;
static ShapeListObject* create(JSContext* cx);
static void trace(JSTracer* trc, JSObject* obj);
Shape* get(uint32_t index)
const;
Shape* getUnbarriered(uint32_t index)
const;
bool traceWeak(JSTracer* trc);
};
// Similar to ShapeListObject. But here we keep a list of the shape and the
// corresponding offset of a particular access (e.g. obj.a).
// The values are saved as: [shape1, offset1, shape2, offset2 ...].
class ShapeListWithOffsetsObject : public ListObject {
public:
static const JSClass class_;
static const JSClassOps classOps_;
static constexpr size_t MaxLength =
16;
static ShapeListWithOffsetsObject* create(JSContext* cx);
static void trace(JSTracer* trc, JSObject* obj);
uint32_t numShapes()
const;
Shape* getShape(uint32_t index)
const;
Shape* getShapeUnbarriered(uint32_t index)
const;
uint32_t getOffset(uint32_t index)
const;
bool traceWeak(JSTracer* trc);
};
}
// namespace js::jit
#endif // jit_ShapeList_h
