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Tip revision: 31bad8966ecad45e1b9496842ca9b074906460ec authored by ffxbld on 28 June 2012, 12:38:40 UTC
Added FENNEC_14_0b10_RELEASE FENNEC_14_0b10_BUILD1 tag(s) for changeset 997811a777df. DONTBUILD CLOSED TREE a=release
Added FENNEC_14_0b10_RELEASE FENNEC_14_0b10_BUILD1 tag(s) for changeset 997811a777df. DONTBUILD CLOSED TREE a=release
Tip revision: 31bad89
jsobj.h
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sw=4 et tw=78:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef jsobj_h___
#define jsobj_h___
/*
* JS object definitions.
*
* A JS object consists of a possibly-shared object descriptor containing
* ordered property names, called the map; and a dense vector of property
* values, called slots. The map/slot pointer pair is GC'ed, while the map
* is reference counted and the slot vector is malloc'ed.
*/
#include "jsapi.h"
#include "jsatom.h"
#include "jsclass.h"
#include "jsfriendapi.h"
#include "jsinfer.h"
#include "jshash.h"
#include "jspubtd.h"
#include "jsprvtd.h"
#include "jslock.h"
#include "jscell.h"
#include "gc/Barrier.h"
#include "vm/ObjectImpl.h"
#include "vm/String.h"
namespace js {
class AutoPropDescArrayRooter;
class ProxyHandler;
class CallObject;
struct GCMarker;
struct NativeIterator;
namespace mjit { class Compiler; }
inline JSObject *
CastAsObject(PropertyOp op)
{
return JS_FUNC_TO_DATA_PTR(JSObject *, op);
}
inline JSObject *
CastAsObject(StrictPropertyOp op)
{
return JS_FUNC_TO_DATA_PTR(JSObject *, op);
}
inline Value
CastAsObjectJsval(PropertyOp op)
{
return ObjectOrNullValue(CastAsObject(op));
}
inline Value
CastAsObjectJsval(StrictPropertyOp op)
{
return ObjectOrNullValue(CastAsObject(op));
}
/*
* JSPropertySpec uses JSAPI JSPropertyOp and JSStrictPropertyOp in function
* signatures, but with JSPROP_NATIVE_ACCESSORS the actual values must be
* JSNatives. To avoid widespread casting, have JS_PSG and JS_PSGS perform
* type-safe casts.
*/
#define JS_PSG(name,getter,flags) \
{name, 0, (flags) | JSPROP_SHARED | JSPROP_NATIVE_ACCESSORS, \
(JSPropertyOp)getter, NULL}
#define JS_PSGS(name,getter,setter,flags) \
{name, 0, (flags) | JSPROP_SHARED | JSPROP_NATIVE_ACCESSORS, \
(JSPropertyOp)getter, (JSStrictPropertyOp)setter}
#define JS_PS_END {0, 0, 0, 0, 0}
/******************************************************************************/
typedef Vector<PropDesc, 1> PropDescArray;
} /* namespace js */
/*
* On success, and if id was found, return true with *objp non-null and with a
* property of *objp stored in *propp. If successful but id was not found,
* return true with both *objp and *propp null.
*/
extern JS_FRIEND_API(JSBool)
js_LookupProperty(JSContext *cx, JSObject *obj, jsid id, JSObject **objp,
JSProperty **propp);
namespace js {
inline bool
LookupProperty(JSContext *cx, JSObject *obj, PropertyName *name,
JSObject **objp, JSProperty **propp)
{
return js_LookupProperty(cx, obj, ATOM_TO_JSID(name), objp, propp);
}
}
extern JS_FRIEND_API(JSBool)
js_LookupElement(JSContext *cx, JSObject *obj, uint32_t index,
JSObject **objp, JSProperty **propp);
extern JSBool
js_DefineProperty(JSContext *cx, JSObject *obj, jsid id, const js::Value *value,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs);
extern JSBool
js_DefineElement(JSContext *cx, JSObject *obj, uint32_t index, const js::Value *value,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs);
extern JSBool
js_GetProperty(JSContext *cx, js::HandleObject obj, js::HandleObject receiver, jsid id, js::Value *vp);
extern JSBool
js_GetElement(JSContext *cx, js::HandleObject obj, js::HandleObject receiver, uint32_t, js::Value *vp);
inline JSBool
js_GetProperty(JSContext *cx, js::HandleObject obj, jsid id, js::Value *vp)
{
return js_GetProperty(cx, obj, obj, id, vp);
}
inline JSBool
js_GetElement(JSContext *cx, js::HandleObject obj, uint32_t index, js::Value *vp)
{
return js_GetElement(cx, obj, obj, index, vp);
}
namespace js {
extern JSBool
GetPropertyDefault(JSContext *cx, js::HandleObject obj, js::HandleId id, const Value &def, Value *vp);
} /* namespace js */
extern JSBool
js_SetPropertyHelper(JSContext *cx, js::HandleObject obj, jsid id, unsigned defineHow,
js::Value *vp, JSBool strict);
namespace js {
inline bool
SetPropertyHelper(JSContext *cx, HandleObject obj, PropertyName *name, unsigned defineHow,
Value *vp, JSBool strict)
{
return !!js_SetPropertyHelper(cx, obj, ATOM_TO_JSID(name), defineHow, vp, strict);
}
} /* namespace js */
extern JSBool
js_SetElementHelper(JSContext *cx, js::HandleObject obj, uint32_t index, unsigned defineHow,
js::Value *vp, JSBool strict);
extern JSBool
js_GetAttributes(JSContext *cx, JSObject *obj, jsid id, unsigned *attrsp);
extern JSBool
js_GetElementAttributes(JSContext *cx, JSObject *obj, uint32_t index, unsigned *attrsp);
extern JSBool
js_SetAttributes(JSContext *cx, JSObject *obj, jsid id, unsigned *attrsp);
extern JSBool
js_SetElementAttributes(JSContext *cx, JSObject *obj, uint32_t index, unsigned *attrsp);
extern JSBool
js_DeleteProperty(JSContext *cx, JSObject *obj, js::PropertyName *name, js::Value *rval, JSBool strict);
extern JSBool
js_DeleteElement(JSContext *cx, JSObject *obj, uint32_t index, js::Value *rval, JSBool strict);
extern JSBool
js_DeleteSpecial(JSContext *cx, JSObject *obj, js::SpecialId sid, js::Value *rval, JSBool strict);
extern JSBool
js_DeleteGeneric(JSContext *cx, JSObject *obj, jsid id, js::Value *rval, JSBool strict);
extern JSType
js_TypeOf(JSContext *cx, JSObject *obj);
namespace js {
/* ES5 8.12.8. */
extern JSBool
DefaultValue(JSContext *cx, HandleObject obj, JSType hint, Value *vp);
extern Class ArrayClass;
extern Class ArrayBufferClass;
extern Class BlockClass;
extern Class BooleanClass;
extern Class CallableObjectClass;
extern Class DateClass;
extern Class ErrorClass;
extern Class ElementIteratorClass;
extern Class GeneratorClass;
extern Class IteratorClass;
extern Class JSONClass;
extern Class MathClass;
extern Class NumberClass;
extern Class NormalArgumentsObjectClass;
extern Class ObjectClass;
extern Class ProxyClass;
extern Class RegExpClass;
extern Class RegExpStaticsClass;
extern Class SlowArrayClass;
extern Class StopIterationClass;
extern Class StringClass;
extern Class StrictArgumentsObjectClass;
extern Class WeakMapClass;
extern Class WithClass;
extern Class XMLFilterClass;
class ArgumentsObject;
class BlockObject;
class BooleanObject;
class ClonedBlockObject;
class DeclEnvObject;
class ElementIteratorObject;
class GlobalObject;
class NestedScopeObject;
class NewObjectCache;
class NormalArgumentsObject;
class NumberObject;
class ScopeObject;
class StaticBlockObject;
class StrictArgumentsObject;
class StringObject;
class RegExpObject;
class WithObject;
} /* namespace js */
/*
* The public interface for an object.
*
* Implementation of the underlying structure occurs in ObjectImpl, from which
* this struct inherits. This inheritance is currently public, but it will
* eventually be made protected. For full details, see vm/ObjectImpl.{h,cpp}.
*
* The JSFunction struct is an extension of this struct allocated from a larger
* GC size-class.
*/
struct JSObject : public js::ObjectImpl
{
private:
friend struct js::Shape;
friend struct js::GCMarker;
friend class js::NewObjectCache;
/* Make the type object to use for LAZY_TYPE objects. */
void makeLazyType(JSContext *cx);
public:
/*
* Update the last property, keeping the number of allocated slots in sync
* with the object's new slot span.
*/
bool setLastProperty(JSContext *cx, const js::Shape *shape);
/* As above, but does not change the slot span. */
inline void setLastPropertyInfallible(const js::Shape *shape);
/* Make a non-array object with the specified initial state. */
static inline JSObject *create(JSContext *cx,
js::gc::AllocKind kind,
js::HandleShape shape,
js::HandleTypeObject type,
js::HeapSlot *slots);
/* Make a dense array object with the specified initial state. */
static inline JSObject *createDenseArray(JSContext *cx,
js::gc::AllocKind kind,
js::HandleShape shape,
js::HandleTypeObject type,
uint32_t length);
/*
* Remove the last property of an object, provided that it is safe to do so
* (the shape and previous shape do not carry conflicting information about
* the object itself).
*/
inline void removeLastProperty(JSContext *cx);
inline bool canRemoveLastProperty();
/*
* Update the slot span directly for a dictionary object, and allocate
* slots to cover the new span if necessary.
*/
bool setSlotSpan(JSContext *cx, uint32_t span);
inline bool nativeContains(JSContext *cx, jsid id);
inline bool nativeContains(JSContext *cx, const js::Shape &shape);
/* Upper bound on the number of elements in an object. */
static const uint32_t NELEMENTS_LIMIT = JS_BIT(28);
public:
inline bool setDelegate(JSContext *cx);
inline bool isBoundFunction() const;
/*
* The meaning of the system object bit is defined by the API client. It is
* set in JS_NewSystemObject and is queried by JS_IsSystemObject, but it
* has no intrinsic meaning to SpiderMonkey.
*/
inline bool isSystem() const;
inline bool setSystem(JSContext *cx);
inline bool hasSpecialEquality() const;
inline bool watched() const;
inline bool setWatched(JSContext *cx);
/* See StackFrame::varObj. */
inline bool isVarObj() const;
inline bool setVarObj(JSContext *cx);
/*
* Objects with an uncacheable proto can have their prototype mutated
* without inducing a shape change on the object. Property cache entries
* and JIT inline caches should not be filled for lookups across prototype
* lookups on the object.
*/
inline bool hasUncacheableProto() const;
inline bool setUncacheableProto(JSContext *cx);
bool generateOwnShape(JSContext *cx, js::Shape *newShape = NULL) {
return replaceWithNewEquivalentShape(cx, lastProperty(), newShape);
}
private:
js::Shape *replaceWithNewEquivalentShape(JSContext *cx, js::Shape *existingShape,
js::Shape *newShape = NULL);
enum GenerateShape {
GENERATE_NONE,
GENERATE_SHAPE
};
bool setFlag(JSContext *cx, /*BaseShape::Flag*/ uint32_t flag,
GenerateShape generateShape = GENERATE_NONE);
public:
inline bool nativeEmpty() const;
bool shadowingShapeChange(JSContext *cx, const js::Shape &shape);
/* Whether there may be indexed properties on this object. */
inline bool isIndexed() const;
inline uint32_t propertyCount() const;
inline bool hasPropertyTable() const;
inline size_t computedSizeOfThisSlotsElements() const;
inline void sizeOfExcludingThis(JSMallocSizeOfFun mallocSizeOf,
size_t *slotsSize, size_t *elementsSize,
size_t *miscSize) const;
static const uint32_t MAX_FIXED_SLOTS = 16;
public:
/* Accessors for properties. */
/* Whether a slot is at a fixed offset from this object. */
inline bool isFixedSlot(size_t slot);
/* Index into the dynamic slots array to use for a dynamic slot. */
inline size_t dynamicSlotIndex(size_t slot);
/* Get a raw pointer to the object's properties. */
inline const js::HeapSlot *getRawSlots();
/*
* Grow or shrink slots immediately before changing the slot span.
* The number of allocated slots is not stored explicitly, and changes to
* the slots must track changes in the slot span.
*/
bool growSlots(JSContext *cx, uint32_t oldCount, uint32_t newCount);
void shrinkSlots(JSContext *cx, uint32_t oldCount, uint32_t newCount);
bool hasDynamicSlots() const { return slots != NULL; }
protected:
inline bool updateSlotsForSpan(JSContext *cx, size_t oldSpan, size_t newSpan);
public:
/*
* Trigger the write barrier on a range of slots that will no longer be
* reachable.
*/
inline void prepareSlotRangeForOverwrite(size_t start, size_t end);
inline void prepareElementRangeForOverwrite(size_t start, size_t end);
void rollbackProperties(JSContext *cx, uint32_t slotSpan);
inline void nativeSetSlot(unsigned slot, const js::Value &value);
inline void nativeSetSlotWithType(JSContext *cx, const js::Shape *shape, const js::Value &value);
inline const js::Value &getReservedSlot(unsigned index) const;
inline js::HeapSlot &getReservedSlotRef(unsigned index);
inline void initReservedSlot(unsigned index, const js::Value &v);
inline void setReservedSlot(unsigned index, const js::Value &v);
/*
* Marks this object as having a singleton type, and leave the type lazy.
* Constructs a new, unique shape for the object.
*/
inline bool setSingletonType(JSContext *cx);
inline js::types::TypeObject *getType(JSContext *cx);
const js::HeapPtr<js::types::TypeObject> &typeFromGC() const {
/* Direct field access for use by GC. */
return type_;
}
inline void setType(js::types::TypeObject *newType);
js::types::TypeObject *getNewType(JSContext *cx, JSFunction *fun = NULL);
#ifdef DEBUG
bool hasNewType(js::types::TypeObject *newType);
#endif
/*
* Mark an object that has been iterated over and is a singleton. We need
* to recover this information in the object's type information after it
* is purged on GC.
*/
inline bool setIteratedSingleton(JSContext *cx);
/*
* Mark an object as requiring its default 'new' type to have unknown
* properties.
*/
bool setNewTypeUnknown(JSContext *cx);
/* Set a new prototype for an object with a singleton type. */
bool splicePrototype(JSContext *cx, JSObject *proto);
/*
* For bootstrapping, whether to splice a prototype for Function.prototype
* or the global object.
*/
bool shouldSplicePrototype(JSContext *cx);
/*
* Parents and scope chains.
*
* All script-accessible objects with a NULL parent are global objects,
* and all global objects have a NULL parent. Some builtin objects which
* are not script-accessible also have a NULL parent, such as parser
* created functions for non-compileAndGo scripts.
*
* Except for the non-script-accessible builtins, the global with which an
* object is associated can be reached by following parent links to that
* global (see global()).
*
* The scope chain of an object is the link in the search path when a
* script does a name lookup on a scope object. For JS internal scope
* objects --- Call, DeclEnv and block --- the chain is stored in
* the first fixed slot of the object, and the object's parent is the
* associated global. For other scope objects, the chain is stored in the
* object's parent.
*
* In compileAndGo code, scope chains can contain only internal scope
* objects with a global object at the root as the scope of the outermost
* non-function script. In non-compileAndGo code, the scope of the
* outermost non-function script might not be a global object, and can have
* a mix of other objects above it before the global object is reached.
*/
/* Access the parent link of an object. */
inline JSObject *getParent() const;
bool setParent(JSContext *cx, JSObject *newParent);
/*
* Get the enclosing scope of an object. When called on non-scope object,
* this will just be the global (the name "enclosing scope" still applies
* in this situation because non-scope objects can be on the scope chain).
*/
inline JSObject *enclosingScope();
inline js::GlobalObject &global() const;
/* N.B. Infallible: NULL means 'no principal', not an error. */
inline JSPrincipals *principals(JSContext *cx);
/* Remove the type (and prototype) or parent from a new object. */
inline bool clearType(JSContext *cx);
bool clearParent(JSContext *cx);
/*
* ES5 meta-object properties and operations.
*/
private:
enum ImmutabilityType { SEAL, FREEZE };
/*
* The guts of Object.seal (ES5 15.2.3.8) and Object.freeze (ES5 15.2.3.9): mark the
* object as non-extensible, and adjust each property's attributes appropriately: each
* property becomes non-configurable, and if |freeze|, data properties become
* read-only as well.
*/
bool sealOrFreeze(JSContext *cx, ImmutabilityType it);
bool isSealedOrFrozen(JSContext *cx, ImmutabilityType it, bool *resultp);
static inline unsigned getSealedOrFrozenAttributes(unsigned attrs, ImmutabilityType it);
public:
bool preventExtensions(JSContext *cx, js::AutoIdVector *props);
/* ES5 15.2.3.8: non-extensible, all props non-configurable */
inline bool seal(JSContext *cx) { return sealOrFreeze(cx, SEAL); }
/* ES5 15.2.3.9: non-extensible, all properties non-configurable, all data props read-only */
bool freeze(JSContext *cx) { return sealOrFreeze(cx, FREEZE); }
bool isSealed(JSContext *cx, bool *resultp) { return isSealedOrFrozen(cx, SEAL, resultp); }
bool isFrozen(JSContext *cx, bool *resultp) { return isSealedOrFrozen(cx, FREEZE, resultp); }
/* Accessors for elements. */
inline bool ensureElements(JSContext *cx, unsigned cap);
bool growElements(JSContext *cx, unsigned cap);
void shrinkElements(JSContext *cx, unsigned cap);
inline js::ElementIteratorObject *asElementIterator();
/*
* Array-specific getters and setters (for both dense and slow arrays).
*/
bool allocateSlowArrayElements(JSContext *cx);
inline uint32_t getArrayLength() const;
inline void setArrayLength(JSContext *cx, uint32_t length);
inline uint32_t getDenseArrayCapacity();
inline void setDenseArrayLength(uint32_t length);
inline void setDenseArrayInitializedLength(uint32_t length);
inline void ensureDenseArrayInitializedLength(JSContext *cx, unsigned index, unsigned extra);
inline void setDenseArrayElement(unsigned idx, const js::Value &val);
inline void initDenseArrayElement(unsigned idx, const js::Value &val);
inline void setDenseArrayElementWithType(JSContext *cx, unsigned idx, const js::Value &val);
inline void initDenseArrayElementWithType(JSContext *cx, unsigned idx, const js::Value &val);
inline void copyDenseArrayElements(unsigned dstStart, const js::Value *src, unsigned count);
inline void initDenseArrayElements(unsigned dstStart, const js::Value *src, unsigned count);
inline void moveDenseArrayElements(unsigned dstStart, unsigned srcStart, unsigned count);
inline void moveDenseArrayElementsUnbarriered(unsigned dstStart, unsigned srcStart, unsigned count);
inline bool denseArrayHasInlineSlots() const;
/* Packed information for this array. */
inline void markDenseArrayNotPacked(JSContext *cx);
/*
* ensureDenseArrayElements ensures that the dense array can hold at least
* index + extra elements. It returns ED_OK on success, ED_FAILED on
* failure to grow the array, ED_SPARSE when the array is too sparse to
* grow (this includes the case of index + extra overflow). In the last
* two cases the array is kept intact.
*/
enum EnsureDenseResult { ED_OK, ED_FAILED, ED_SPARSE };
inline EnsureDenseResult ensureDenseArrayElements(JSContext *cx, unsigned index, unsigned extra);
/*
* Check if after growing the dense array will be too sparse.
* newElementsHint is an estimated number of elements to be added.
*/
bool willBeSparseDenseArray(unsigned requiredCapacity, unsigned newElementsHint);
static bool makeDenseArraySlow(JSContext *cx, js::HandleObject obj);
/*
* If this array object has a data property with index i, set *vp to its
* value and return true. If not, do vp->setMagic(JS_ARRAY_HOLE) and return
* true. On OOM, report it and return false.
*/
bool arrayGetOwnDataElement(JSContext *cx, size_t i, js::Value *vp);
public:
bool allocateArrayBufferSlots(JSContext *cx, uint32_t size, uint8_t *contents = NULL);
inline uint32_t arrayBufferByteLength();
inline uint8_t * arrayBufferDataOffset();
public:
/*
* Date-specific getters and setters.
*/
static const uint32_t JSSLOT_DATE_UTC_TIME = 0;
/*
* Cached slots holding local properties of the date.
* These are undefined until the first actual lookup occurs
* and are reset to undefined whenever the date's time is modified.
*/
static const uint32_t JSSLOT_DATE_COMPONENTS_START = 1;
static const uint32_t JSSLOT_DATE_LOCAL_TIME = 1;
static const uint32_t JSSLOT_DATE_LOCAL_YEAR = 2;
static const uint32_t JSSLOT_DATE_LOCAL_MONTH = 3;
static const uint32_t JSSLOT_DATE_LOCAL_DATE = 4;
static const uint32_t JSSLOT_DATE_LOCAL_DAY = 5;
static const uint32_t JSSLOT_DATE_LOCAL_HOURS = 6;
static const uint32_t JSSLOT_DATE_LOCAL_MINUTES = 7;
static const uint32_t JSSLOT_DATE_LOCAL_SECONDS = 8;
static const uint32_t DATE_CLASS_RESERVED_SLOTS = 9;
inline const js::Value &getDateUTCTime() const;
inline void setDateUTCTime(const js::Value &pthis);
/*
* Function-specific getters and setters.
*/
friend struct JSFunction;
inline JSFunction *toFunction();
inline const JSFunction *toFunction() const;
public:
/*
* Iterator-specific getters and setters.
*/
static const uint32_t ITER_CLASS_NFIXED_SLOTS = 1;
inline js::NativeIterator *getNativeIterator() const;
inline void setNativeIterator(js::NativeIterator *);
/*
* XML-related getters and setters.
*/
/*
* Slots for XML-related classes are as follows:
* - NamespaceClass.base reserves the *_NAME_* and *_NAMESPACE_* slots.
* - QNameClass.base, AttributeNameClass, AnyNameClass reserve
* the *_NAME_* and *_QNAME_* slots.
* - Others (XMLClass, js_XMLFilterClass) don't reserve any slots.
*/
private:
static const uint32_t JSSLOT_NAME_PREFIX = 0; // shared
static const uint32_t JSSLOT_NAME_URI = 1; // shared
static const uint32_t JSSLOT_NAMESPACE_DECLARED = 2;
static const uint32_t JSSLOT_QNAME_LOCAL_NAME = 2;
public:
static const uint32_t NAMESPACE_CLASS_RESERVED_SLOTS = 3;
static const uint32_t QNAME_CLASS_RESERVED_SLOTS = 3;
inline JSLinearString *getNamePrefix() const;
inline jsval getNamePrefixVal() const;
inline void setNamePrefix(JSLinearString *prefix);
inline void clearNamePrefix();
inline JSLinearString *getNameURI() const;
inline jsval getNameURIVal() const;
inline void setNameURI(JSLinearString *uri);
inline jsval getNamespaceDeclared() const;
inline void setNamespaceDeclared(jsval decl);
inline JSAtom *getQNameLocalName() const;
inline jsval getQNameLocalNameVal() const;
inline void setQNameLocalName(JSAtom *name);
/*
* Back to generic stuff.
*/
inline bool isCallable();
inline void finish(js::FreeOp *fop);
JS_ALWAYS_INLINE void finalize(js::FreeOp *fop);
inline bool hasProperty(JSContext *cx, jsid id, bool *foundp, unsigned flags = 0);
/*
* Allocate and free an object slot.
*
* FIXME: bug 593129 -- slot allocation should be done by object methods
* after calling object-parameter-free shape methods, avoiding coupling
* logic across the object vs. shape module wall.
*/
bool allocSlot(JSContext *cx, uint32_t *slotp);
void freeSlot(JSContext *cx, uint32_t slot);
public:
bool reportNotConfigurable(JSContext* cx, jsid id, unsigned report = JSREPORT_ERROR);
bool reportNotExtensible(JSContext *cx, unsigned report = JSREPORT_ERROR);
/*
* Get the property with the given id, then call it as a function with the
* given arguments, providing this object as |this|. If the property isn't
* callable a TypeError will be thrown. On success the value returned by
* the call is stored in *vp.
*/
bool callMethod(JSContext *cx, jsid id, unsigned argc, js::Value *argv, js::Value *vp);
private:
js::Shape *getChildProperty(JSContext *cx, js::Shape *parent, js::StackShape &child);
protected:
/*
* Internal helper that adds a shape not yet mapped by this object.
*
* Notes:
* 1. getter and setter must be normalized based on flags (see jsscope.cpp).
* 2. !isExtensible() checking must be done by callers.
*/
js::Shape *addPropertyInternal(JSContext *cx, jsid id,
JSPropertyOp getter, JSStrictPropertyOp setter,
uint32_t slot, unsigned attrs,
unsigned flags, int shortid, js::Shape **spp,
bool allowDictionary);
private:
bool toDictionaryMode(JSContext *cx);
struct TradeGutsReserved;
static bool ReserveForTradeGuts(JSContext *cx, JSObject *a, JSObject *b,
TradeGutsReserved &reserved);
static void TradeGuts(JSContext *cx, JSObject *a, JSObject *b,
TradeGutsReserved &reserved);
public:
/* Add a property whose id is not yet in this scope. */
js::Shape *addProperty(JSContext *cx, jsid id,
JSPropertyOp getter, JSStrictPropertyOp setter,
uint32_t slot, unsigned attrs,
unsigned flags, int shortid, bool allowDictionary = true);
/* Add a data property whose id is not yet in this scope. */
js::Shape *addDataProperty(JSContext *cx, jsid id, uint32_t slot, unsigned attrs) {
JS_ASSERT(!(attrs & (JSPROP_GETTER | JSPROP_SETTER)));
return addProperty(cx, id, NULL, NULL, slot, attrs, 0, 0);
}
/* Add or overwrite a property for id in this scope. */
js::Shape *putProperty(JSContext *cx, jsid id,
JSPropertyOp getter, JSStrictPropertyOp setter,
uint32_t slot, unsigned attrs,
unsigned flags, int shortid);
inline js::Shape *
putProperty(JSContext *cx, js::PropertyName *name,
JSPropertyOp getter, JSStrictPropertyOp setter,
uint32_t slot, unsigned attrs, unsigned flags, int shortid) {
return putProperty(cx, js_CheckForStringIndex(ATOM_TO_JSID(name)), getter, setter, slot, attrs, flags, shortid);
}
/* Change the given property into a sibling with the same id in this scope. */
js::Shape *changeProperty(JSContext *cx, js::Shape *shape, unsigned attrs, unsigned mask,
JSPropertyOp getter, JSStrictPropertyOp setter);
inline bool changePropertyAttributes(JSContext *cx, js::Shape *shape, unsigned attrs);
/* Remove the property named by id from this object. */
bool removeProperty(JSContext *cx, jsid id);
/* Clear the scope, making it empty. */
void clear(JSContext *cx);
inline JSBool lookupGeneric(JSContext *cx, jsid id, JSObject **objp, JSProperty **propp);
inline JSBool lookupProperty(JSContext *cx, js::PropertyName *name, JSObject **objp, JSProperty **propp);
inline JSBool lookupElement(JSContext *cx, uint32_t index,
JSObject **objp, JSProperty **propp);
inline JSBool lookupSpecial(JSContext *cx, js::SpecialId sid,
JSObject **objp, JSProperty **propp);
inline JSBool defineGeneric(JSContext *cx, jsid id, const js::Value &value,
JSPropertyOp getter = JS_PropertyStub,
JSStrictPropertyOp setter = JS_StrictPropertyStub,
unsigned attrs = JSPROP_ENUMERATE);
inline JSBool defineProperty(JSContext *cx, js::PropertyName *name, const js::Value &value,
JSPropertyOp getter = JS_PropertyStub,
JSStrictPropertyOp setter = JS_StrictPropertyStub,
unsigned attrs = JSPROP_ENUMERATE);
inline JSBool defineElement(JSContext *cx, uint32_t index, const js::Value &value,
JSPropertyOp getter = JS_PropertyStub,
JSStrictPropertyOp setter = JS_StrictPropertyStub,
unsigned attrs = JSPROP_ENUMERATE);
inline JSBool defineSpecial(JSContext *cx, js::SpecialId sid, const js::Value &value,
JSPropertyOp getter = JS_PropertyStub,
JSStrictPropertyOp setter = JS_StrictPropertyStub,
unsigned attrs = JSPROP_ENUMERATE);
inline JSBool getGeneric(JSContext *cx, JSObject *receiver, jsid id, js::Value *vp);
inline JSBool getProperty(JSContext *cx, JSObject *receiver, js::PropertyName *name,
js::Value *vp);
inline JSBool getElement(JSContext *cx, JSObject *receiver, uint32_t index, js::Value *vp);
/* If element is not present (e.g. array hole) *present is set to
false and the contents of *vp are unusable garbage. */
inline JSBool getElementIfPresent(JSContext *cx, JSObject *receiver, uint32_t index,
js::Value *vp, bool *present);
inline JSBool getSpecial(JSContext *cx, JSObject *receiver, js::SpecialId sid, js::Value *vp);
inline JSBool getGeneric(JSContext *cx, jsid id, js::Value *vp);
inline JSBool getProperty(JSContext *cx, js::PropertyName *name, js::Value *vp);
inline JSBool getElement(JSContext *cx, uint32_t index, js::Value *vp);
inline JSBool getSpecial(JSContext *cx, js::SpecialId sid, js::Value *vp);
inline JSBool setGeneric(JSContext *cx, jsid id, js::Value *vp, JSBool strict);
inline JSBool setProperty(JSContext *cx, js::PropertyName *name, js::Value *vp, JSBool strict);
inline JSBool setElement(JSContext *cx, uint32_t index, js::Value *vp, JSBool strict);
inline JSBool setSpecial(JSContext *cx, js::SpecialId sid, js::Value *vp, JSBool strict);
JSBool nonNativeSetProperty(JSContext *cx, jsid id, js::Value *vp, JSBool strict);
JSBool nonNativeSetElement(JSContext *cx, uint32_t index, js::Value *vp, JSBool strict);
inline JSBool getGenericAttributes(JSContext *cx, jsid id, unsigned *attrsp);
inline JSBool getPropertyAttributes(JSContext *cx, js::PropertyName *name, unsigned *attrsp);
inline JSBool getElementAttributes(JSContext *cx, uint32_t index, unsigned *attrsp);
inline JSBool getSpecialAttributes(JSContext *cx, js::SpecialId sid, unsigned *attrsp);
inline JSBool setGenericAttributes(JSContext *cx, jsid id, unsigned *attrsp);
inline JSBool setPropertyAttributes(JSContext *cx, js::PropertyName *name, unsigned *attrsp);
inline JSBool setElementAttributes(JSContext *cx, uint32_t index, unsigned *attrsp);
inline JSBool setSpecialAttributes(JSContext *cx, js::SpecialId sid, unsigned *attrsp);
inline bool deleteProperty(JSContext *cx, js::PropertyName *name, js::Value *rval, bool strict);
inline bool deleteElement(JSContext *cx, uint32_t index, js::Value *rval, bool strict);
inline bool deleteSpecial(JSContext *cx, js::SpecialId sid, js::Value *rval, bool strict);
bool deleteByValue(JSContext *cx, const js::Value &property, js::Value *rval, bool strict);
inline bool enumerate(JSContext *cx, JSIterateOp iterop, js::Value *statep, jsid *idp);
inline bool defaultValue(JSContext *cx, JSType hint, js::Value *vp);
inline JSType typeOf(JSContext *cx);
inline JSObject *thisObject(JSContext *cx);
static bool thisObject(JSContext *cx, const js::Value &v, js::Value *vp);
bool swap(JSContext *cx, JSObject *other);
inline void initArrayClass();
/*
* In addition to the generic object interface provided by JSObject,
* specific types of objects may provide additional operations. To access,
* these addition operations, callers should use the pattern:
*
* if (obj.isX()) {
* XObject &x = obj.asX();
* x.foo();
* }
*
* These XObject classes form a hierarchy. For example, for a cloned block
* object, the following predicates are true: isClonedBlock, isBlock,
* isNestedScope and isScope. Each of these has a respective class that
* derives and adds operations.
*
* A class XObject is defined in a vm/XObject{.h, .cpp, -inl.h} file
* triplet (along with any class YObject that derives XObject).
*
* Note that X represents a low-level representation and does not query the
* [[Class]] property of object defined by the spec (for this, see
* js::ObjectClassIs).
*
* SpiderMonkey has not been completely switched to the isX/asX/XObject
* pattern so in some cases there is no XObject class and the engine
* instead pokes directly at reserved slots and getPrivate. In such cases,
* consider adding the missing XObject class.
*/
/* Direct subtypes of JSObject: */
inline bool isArguments() const;
inline bool isArrayBuffer() const;
inline bool isDate() const;
inline bool isElementIterator() const;
inline bool isError() const;
inline bool isFunction() const;
inline bool isGenerator() const;
inline bool isGlobal() const;
inline bool isIterator() const;
inline bool isNamespace() const;
inline bool isObject() const;
inline bool isQName() const;
inline bool isPrimitive() const;
inline bool isProxy() const;
inline bool isRegExp() const;
inline bool isRegExpStatics() const;
inline bool isScope() const;
inline bool isScript() const;
inline bool isStopIteration() const;
inline bool isTypedArray() const;
inline bool isWeakMap() const;
inline bool isXML() const;
inline bool isXMLId() const;
/* Subtypes of ScopeObject. */
inline bool isBlock() const;
inline bool isCall() const;
inline bool isDeclEnv() const;
inline bool isNestedScope() const;
inline bool isWith() const;
inline bool isClonedBlock() const;
inline bool isStaticBlock() const;
/* Subtypes of PrimitiveObject. */
inline bool isBoolean() const;
inline bool isNumber() const;
inline bool isString() const;
/* Subtypes of ArgumentsObject. */
inline bool isNormalArguments() const;
inline bool isStrictArguments() const;
/* Subtypes of Proxy. */
inline bool isWrapper() const;
inline bool isFunctionProxy() const;
inline bool isCrossCompartmentWrapper() const;
inline js::ArgumentsObject &asArguments();
inline const js::ArgumentsObject &asArguments() const;
inline js::BlockObject &asBlock();
inline js::BooleanObject &asBoolean();
inline js::CallObject &asCall();
inline js::ClonedBlockObject &asClonedBlock();
inline js::DeclEnvObject &asDeclEnv();
inline js::GlobalObject &asGlobal();
inline js::NestedScopeObject &asNestedScope();
inline js::NormalArgumentsObject &asNormalArguments();
inline js::NumberObject &asNumber();
inline js::RegExpObject &asRegExp();
inline js::ScopeObject &asScope();
inline js::StrictArgumentsObject &asStrictArguments();
inline js::StaticBlockObject &asStaticBlock();
inline js::StringObject &asString();
inline js::WithObject &asWith();
static inline js::ThingRootKind rootKind() { return js::THING_ROOT_OBJECT; }
#ifdef DEBUG
void dump();
#endif
private:
static void staticAsserts() {
MOZ_STATIC_ASSERT(sizeof(JSObject) == sizeof(js::shadow::Object),
"shadow interface must match actual interface");
MOZ_STATIC_ASSERT(sizeof(JSObject) == sizeof(js::ObjectImpl),
"JSObject itself must not have any fields");
MOZ_STATIC_ASSERT(sizeof(JSObject) % sizeof(js::Value) == 0,
"fixed slots after an object must be aligned");
}
};
/*
* The only sensible way to compare JSObject with == is by identity. We use
* const& instead of * as a syntactic way to assert non-null. This leads to an
* abundance of address-of operators to identity. Hence this overload.
*/
static JS_ALWAYS_INLINE bool
operator==(const JSObject &lhs, const JSObject &rhs)
{
return &lhs == &rhs;
}
static JS_ALWAYS_INLINE bool
operator!=(const JSObject &lhs, const JSObject &rhs)
{
return &lhs != &rhs;
}
struct JSObject_Slots2 : JSObject { js::Value fslots[2]; };
struct JSObject_Slots4 : JSObject { js::Value fslots[4]; };
struct JSObject_Slots8 : JSObject { js::Value fslots[8]; };
struct JSObject_Slots12 : JSObject { js::Value fslots[12]; };
struct JSObject_Slots16 : JSObject { js::Value fslots[16]; };
#define JSSLOT_FREE(clasp) JSCLASS_RESERVED_SLOTS(clasp)
class JSValueArray {
public:
jsval *array;
size_t length;
JSValueArray(jsval *v, size_t c) : array(v), length(c) {}
};
class ValueArray {
public:
js::Value *array;
size_t length;
ValueArray(js::Value *v, size_t c) : array(v), length(c) {}
};
/* For manipulating JSContext::sharpObjectMap. */
extern bool
js_EnterSharpObject(JSContext *cx, JSObject *obj, JSIdArray **idap, bool *alreadySeen, bool *isSharp);
extern void
js_LeaveSharpObject(JSContext *cx, JSIdArray **idap);
/*
* Mark objects stored in map if GC happens between js_EnterSharpObject
* and js_LeaveSharpObject. GC calls this when map->depth > 0.
*/
extern void
js_TraceSharpMap(JSTracer *trc, JSSharpObjectMap *map);
extern JSBool
js_HasOwnPropertyHelper(JSContext *cx, js::LookupGenericOp lookup, unsigned argc,
js::Value *vp);
extern JSBool
js_HasOwnProperty(JSContext *cx, js::LookupGenericOp lookup, js::HandleObject obj, jsid id,
JSObject **objp, JSProperty **propp);
extern JSBool
js_PropertyIsEnumerable(JSContext *cx, JSObject *obj, jsid id, js::Value *vp);
#if JS_HAS_OBJ_PROTO_PROP
extern JSPropertySpec object_props[];
#else
#define object_props NULL
#endif
extern JSFunctionSpec object_methods[];
extern JSFunctionSpec object_static_methods[];
namespace js {
bool
IsStandardClassResolved(JSObject *obj, js::Class *clasp);
void
MarkStandardClassInitializedNoProto(JSObject *obj, js::Class *clasp);
/*
* Cache for speeding up repetitive creation of objects in the VM.
* When an object is created which matches the criteria in the 'key' section
* below, an entry is filled with the resulting object.
*/
class NewObjectCache
{
struct Entry
{
/* Class of the constructed object. */
Class *clasp;
/*
* Key with one of three possible values:
*
* - Global for the object. The object must have a standard class for
* which the global's prototype can be determined, and the object's
* parent will be the global.
*
* - Prototype for the object (cannot be global). The object's parent
* will be the prototype's parent.
*
* - Type for the object. The object's parent will be the type's
* prototype's parent.
*/
gc::Cell *key;
/* Allocation kind for the constructed object. */
gc::AllocKind kind;
/* Number of bytes to copy from the template object. */
uint32_t nbytes;
/*
* Template object to copy from, with the initial values of fields,
* fixed slots (undefined) and private data (NULL).
*/
JSObject_Slots16 templateObject;
};
Entry entries[41];
void staticAsserts() {
JS_STATIC_ASSERT(gc::FINALIZE_OBJECT_LAST == gc::FINALIZE_OBJECT16_BACKGROUND);
}
public:
typedef int EntryIndex;
void reset() { PodZero(this); }
/*
* Get the entry index for the given lookup, return whether there was a hit
* on an existing entry.
*/
inline bool lookupProto(Class *clasp, JSObject *proto, gc::AllocKind kind, EntryIndex *pentry);
inline bool lookupGlobal(Class *clasp, js::GlobalObject *global, gc::AllocKind kind, EntryIndex *pentry);
inline bool lookupType(Class *clasp, js::types::TypeObject *type, gc::AllocKind kind, EntryIndex *pentry);
/* Return a new object from a cache hit produced by a lookup method. */
inline JSObject *newObjectFromHit(JSContext *cx, EntryIndex entry);
/* Fill an entry after a cache miss. */
inline void fillProto(EntryIndex entry, Class *clasp, JSObject *proto, gc::AllocKind kind, JSObject *obj);
inline void fillGlobal(EntryIndex entry, Class *clasp, js::GlobalObject *global, gc::AllocKind kind, JSObject *obj);
inline void fillType(EntryIndex entry, Class *clasp, js::types::TypeObject *type, gc::AllocKind kind, JSObject *obj);
/* Invalidate any entries which might produce an object with shape/proto. */
void invalidateEntriesForShape(JSContext *cx, Shape *shape, JSObject *proto);
private:
inline bool lookup(Class *clasp, gc::Cell *key, gc::AllocKind kind, EntryIndex *pentry);
inline void fill(EntryIndex entry, Class *clasp, gc::Cell *key, gc::AllocKind kind, JSObject *obj);
static inline void copyCachedToObject(JSObject *dst, JSObject *src);
};
} /* namespace js */
/*
* Select Object.prototype method names shared between jsapi.cpp and jsobj.cpp.
*/
extern const char js_watch_str[];
extern const char js_unwatch_str[];
extern const char js_hasOwnProperty_str[];
extern const char js_isPrototypeOf_str[];
extern const char js_propertyIsEnumerable_str[];
#ifdef OLD_GETTER_SETTER_METHODS
extern const char js_defineGetter_str[];
extern const char js_defineSetter_str[];
extern const char js_lookupGetter_str[];
extern const char js_lookupSetter_str[];
#endif
extern JSBool
js_PopulateObject(JSContext *cx, js::HandleObject newborn, JSObject *props);
/*
* Fast access to immutable standard objects (constructors and prototypes).
*/
extern JSBool
js_GetClassObject(JSContext *cx, JSObject *obj, JSProtoKey key,
JSObject **objp);
/*
* If protoKey is not JSProto_Null, then clasp is ignored. If protoKey is
* JSProto_Null, clasp must non-null.
*/
extern JSBool
js_FindClassObject(JSContext *cx, JSObject *start, JSProtoKey key,
js::Value *vp, js::Class *clasp = NULL);
// Specialized call for constructing |this| with a known function callee,
// and a known prototype.
extern JSObject *
js_CreateThisForFunctionWithProto(JSContext *cx, js::HandleObject callee, JSObject *proto);
// Specialized call for constructing |this| with a known function callee.
extern JSObject *
js_CreateThisForFunction(JSContext *cx, js::HandleObject callee, bool newType);
// Generic call for constructing |this|.
extern JSObject *
js_CreateThis(JSContext *cx, js::Class *clasp, JSObject *callee);
extern jsid
js_CheckForStringIndex(jsid id);
/*
* Find or create a property named by id in obj's scope, with the given getter
* and setter, slot, attributes, and other members.
*/
extern js::Shape *
js_AddNativeProperty(JSContext *cx, JSObject *obj, jsid id,
JSPropertyOp getter, JSStrictPropertyOp setter, uint32_t slot,
unsigned attrs, unsigned flags, int shortid);
extern JSBool
js_DefineOwnProperty(JSContext *cx, js::HandleObject obj, js::HandleId id,
const js::Value &descriptor, JSBool *bp);
namespace js {
/*
* Flags for the defineHow parameter of js_DefineNativeProperty.
*/
const unsigned DNP_CACHE_RESULT = 1; /* an interpreter call from JSOP_INITPROP */
const unsigned DNP_DONT_PURGE = 2; /* suppress js_PurgeScopeChain */
const unsigned DNP_UNQUALIFIED = 4; /* Unqualified property set. Only used in
the defineHow argument of
js_SetPropertyHelper. */
const unsigned DNP_SKIP_TYPE = 8; /* Don't update type information */
/*
* Return successfully added or changed shape or NULL on error.
*/
extern const Shape *
DefineNativeProperty(JSContext *cx, HandleObject obj, jsid id, const Value &value,
PropertyOp getter, StrictPropertyOp setter, unsigned attrs,
unsigned flags, int shortid, unsigned defineHow = 0);
inline const Shape *
DefineNativeProperty(JSContext *cx, HandleObject obj, PropertyName *name, const Value &value,
PropertyOp getter, StrictPropertyOp setter, unsigned attrs,
unsigned flags, int shortid, unsigned defineHow = 0)
{
return DefineNativeProperty(cx, obj, ATOM_TO_JSID(name), value, getter, setter, attrs, flags,
shortid, defineHow);
}
/*
* Specialized subroutine that allows caller to preset JSRESOLVE_* flags.
*/
extern bool
LookupPropertyWithFlags(JSContext *cx, JSObject *obj, jsid id, unsigned flags,
JSObject **objp, JSProperty **propp);
inline bool
LookupPropertyWithFlags(JSContext *cx, JSObject *obj, PropertyName *name, unsigned flags,
JSObject **objp, JSProperty **propp)
{
return LookupPropertyWithFlags(cx, obj, ATOM_TO_JSID(name), flags, objp, propp);
}
/*
* Call the [[DefineOwnProperty]] internal method of obj.
*
* If obj is an array, this follows ES5 15.4.5.1.
* If obj is any other native object, this follows ES5 8.12.9.
* If obj is a proxy, this calls the proxy handler's defineProperty method.
* Otherwise, this reports an error and returns false.
*/
extern bool
DefineProperty(JSContext *cx, js::HandleObject obj,
js::HandleId id, const PropDesc &desc, bool throwError,
bool *rval);
/*
* Read property descriptors from props, as for Object.defineProperties. See
* ES5 15.2.3.7 steps 3-5.
*/
extern bool
ReadPropertyDescriptors(JSContext *cx, JSObject *props, bool checkAccessors,
AutoIdVector *ids, AutoPropDescArrayRooter *descs);
/*
* Constant to pass to js_LookupPropertyWithFlags to infer bits from current
* bytecode.
*/
static const unsigned RESOLVE_INFER = 0xffff;
/*
* If cacheResult is false, return JS_NO_PROP_CACHE_FILL on success.
*/
extern bool
FindPropertyHelper(JSContext *cx, HandlePropertyName name,
bool cacheResult, HandleObject scopeChain,
JSObject **objp, JSObject **pobjp, JSProperty **propp);
/*
* Search for name either on the current scope chain or on the scope chain's
* global object, per the global parameter.
*/
extern bool
FindProperty(JSContext *cx, HandlePropertyName name, HandleObject scopeChain,
JSObject **objp, JSObject **pobjp, JSProperty **propp);
extern JSObject *
FindIdentifierBase(JSContext *cx, JSObject *scopeChain, PropertyName *name);
}
extern JSObject *
js_FindVariableScope(JSContext *cx, JSFunction **funp);
/* JSGET_CACHE_RESULT is the analogue of DNP_CACHE_RESULT for js_GetMethod. */
const unsigned JSGET_CACHE_RESULT = 1; // from a caching interpreter opcode
/*
* NB: js_NativeGet and js_NativeSet are called with the scope containing shape
* (pobj's scope for Get, obj's for Set) locked, and on successful return, that
* scope is again locked. But on failure, both functions return false with the
* scope containing shape unlocked.
*/
extern JSBool
js_NativeGet(JSContext *cx, JSObject *obj, JSObject *pobj, const js::Shape *shape, unsigned getHow,
js::Value *vp);
extern JSBool
js_NativeSet(JSContext *cx, JSObject *obj, const js::Shape *shape, bool added,
bool strict, js::Value *vp);
namespace js {
bool
GetPropertyHelper(JSContext *cx, HandleObject obj, jsid id, uint32_t getHow, Value *vp);
inline bool
GetPropertyHelper(JSContext *cx, HandleObject obj, PropertyName *name, uint32_t getHow, Value *vp)
{
return GetPropertyHelper(cx, obj, ATOM_TO_JSID(name), getHow, vp);
}
bool
GetOwnPropertyDescriptor(JSContext *cx, HandleObject obj, HandleId id, PropertyDescriptor *desc);
bool
GetOwnPropertyDescriptor(JSContext *cx, HandleObject obj, HandleId id, Value *vp);
bool
NewPropertyDescriptorObject(JSContext *cx, const PropertyDescriptor *desc, Value *vp);
} /* namespace js */
extern JSBool
js_GetMethod(JSContext *cx, js::HandleObject obj, jsid id, unsigned getHow, js::Value *vp);
namespace js {
inline bool
GetMethod(JSContext *cx, HandleObject obj, PropertyName *name, unsigned getHow, Value *vp)
{
return js_GetMethod(cx, obj, ATOM_TO_JSID(name), getHow, vp);
}
} /* namespace js */
namespace js {
/*
* If obj has an already-resolved data property for id, return true and
* store the property value in *vp. This helper assumes the caller has already
* called js_CheckForStringIndex.
*/
extern bool
HasDataProperty(JSContext *cx, HandleObject obj, jsid id, Value *vp);
inline bool
HasDataProperty(JSContext *cx, HandleObject obj, JSAtom *atom, Value *vp)
{
return HasDataProperty(cx, obj, js_CheckForStringIndex(ATOM_TO_JSID(atom)), vp);
}
extern JSBool
CheckAccess(JSContext *cx, JSObject *obj, jsid id, JSAccessMode mode,
js::Value *vp, unsigned *attrsp);
} /* namespace js */
extern bool
js_IsDelegate(JSContext *cx, JSObject *obj, const js::Value &v);
/*
* Wrap boolean, number or string as Boolean, Number or String object.
* *vp must not be an object, null or undefined.
*/
extern JSBool
js_PrimitiveToObject(JSContext *cx, js::Value *vp);
extern JSBool
js_ValueToObjectOrNull(JSContext *cx, const js::Value &v, JSObject **objp);
/* Throws if v could not be converted to an object. */
extern JSObject *
js_ValueToNonNullObject(JSContext *cx, const js::Value &v);
namespace js {
/*
* Invokes the ES5 ToObject algorithm on *vp, writing back the object to vp.
* If *vp might already be an object, use ToObject.
*/
extern JSObject *
ToObjectSlow(JSContext *cx, Value *vp);
JS_ALWAYS_INLINE JSObject *
ToObject(JSContext *cx, Value *vp)
{
if (vp->isObject())
return &vp->toObject();
return ToObjectSlow(cx, vp);
}
/* As for ToObject, but preserves the original value. */
inline JSObject *
ValueToObject(JSContext *cx, const Value &v)
{
if (v.isObject())
return &v.toObject();
return js_ValueToNonNullObject(cx, v);
}
} /* namespace js */
extern void
js_PrintObjectSlotName(JSTracer *trc, char *buf, size_t bufsize);
extern bool
js_ClearNative(JSContext *cx, JSObject *obj);
extern JSBool
js_ReportGetterOnlyAssignment(JSContext *cx);
extern unsigned
js_InferFlags(JSContext *cx, unsigned defaultFlags);
/* Object constructor native. Exposed only so the JIT can know its address. */
JSBool
js_Object(JSContext *cx, unsigned argc, js::Value *vp);
/*
* If protoKey is not JSProto_Null, then clasp is ignored. If protoKey is
* JSProto_Null, clasp must non-null.
*
* If protoKey is constant and scope is non-null, use GlobalObject's prototype
* methods instead.
*/
extern JS_FRIEND_API(JSBool)
js_GetClassPrototype(JSContext *cx, JSObject *scope, JSProtoKey protoKey,
JSObject **protop, js::Class *clasp = NULL);
namespace js {
extern bool
SetProto(JSContext *cx, JSObject *obj, JSObject *proto, bool checkForCycles);
extern JSString *
obj_toStringHelper(JSContext *cx, JSObject *obj);
extern JSBool
eval(JSContext *cx, unsigned argc, Value *vp);
/*
* Performs a direct eval for the given arguments, which must correspond to the
* currently-executing stack frame, which must be a script frame. On completion
* the result is returned in args.rval.
*/
extern bool
DirectEval(JSContext *cx, const CallArgs &args);
/*
* True iff |v| is the built-in eval function for the global object that
* corresponds to |scopeChain|.
*/
extern bool
IsBuiltinEvalForScope(JSObject *scopeChain, const js::Value &v);
/* True iff fun is a built-in eval function. */
extern bool
IsAnyBuiltinEval(JSFunction *fun);
/* 'call' should be for the eval/Function native invocation. */
extern JSPrincipals *
PrincipalsForCompiledCode(const CallReceiver &call, JSContext *cx);
extern JSObject *
NonNullObject(JSContext *cx, const Value &v);
extern const char *
InformalValueTypeName(const Value &v);
inline void
DestroyIdArray(FreeOp *fop, JSIdArray *ida);
/* Helpers for throwing. These always return false. */
extern bool
Throw(JSContext *cx, jsid id, unsigned errorNumber);
extern bool
Throw(JSContext *cx, JSObject *obj, unsigned errorNumber);
} /* namespace js */
#endif /* jsobj_h___ */
