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Bug 684110 - Clean JSObject::clasp usage (r=pbiggar)

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This commit is contained in:
Luke Wagner
2011-09-02 17:23:26 -07:00
parent d939037430
commit ec00ca00c4
71 changed files with 531 additions and 737 deletions
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54
js/src/jsarray.cpp
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@@ -44,7 +44,7 @@
* Array objects begin as "dense" arrays, optimized for index-only property
* access over a vector of slots with high load factor. Array methods
* optimize for denseness by testing that the object's class is
* &js_ArrayClass, and can then directly manipulate the slots for efficiency.
* &ArrayClass, and can then directly manipulate the slots for efficiency.
*
* We track these pieces of metadata for arrays in dense mode:
* - The array's length property as a uint32, accessible with
@@ -81,7 +81,7 @@
* known to have no hole values below its initialized length, then it is a
* "packed" array and can be accessed much faster by JIT code.
*
* Arrays are converted to use js_SlowArrayClass when any of these conditions
* Arrays are converted to use SlowArrayClass when any of these conditions
* are met:
* - there are more than MIN_SPARSE_INDEX slots total and the load factor
* (COUNT / capacity) is less than 0.25
@@ -93,7 +93,7 @@
* properties in the order they were created. We could instead maintain the
* scope to track property enumeration order, but still use the fast slot
* access. That would have the same memory cost as just using a
* js_SlowArrayClass, but have the same performance characteristics as a dense
* SlowArrayClass, but have the same performance characteristics as a dense
* array for slot accesses, at some cost in code complexity.
*/
#include <stdlib.h>
@@ -149,7 +149,7 @@ using namespace js::types;
static inline bool
ENSURE_SLOW_ARRAY(JSContext *cx, JSObject *obj)
{
return obj->getClass() == &js_SlowArrayClass ||
return obj->getClass() == &SlowArrayClass ||
obj->makeDenseArraySlow(cx);
}
@@ -246,14 +246,11 @@ static JSBool
BigIndexToId(JSContext *cx, JSObject *obj, jsuint index, JSBool createAtom,
jsid *idp)
{
jschar buf[10], *start;
Class *clasp;
JSAtom *atom;
JS_STATIC_ASSERT((jsuint)-1 == 4294967295U);
JS_ASSERT(index > JSID_INT_MAX);
start = JS_ARRAY_END(buf);
jschar buf[10];
jschar *start = JS_ARRAY_END(buf);
do {
--start;
*start = (jschar)('0' + index % 10);
@@ -264,14 +261,11 @@ BigIndexToId(JSContext *cx, JSObject *obj, jsuint index, JSBool createAtom,
* Skip the atomization if the class is known to store atoms corresponding
* to big indexes together with elements. In such case we know that the
* array does not have an element at the given index if its atom does not
* exist. Fast arrays (clasp == &js_ArrayClass) don't use atoms for
* any indexes, though it would be rare to see them have a big index
* in any case.
* exist. Dense arrays don't use atoms for any indexes, though it would be
* rare to see them have a big index in any case.
*/
if (!createAtom &&
((clasp = obj->getClass()) == &js_SlowArrayClass ||
obj->isArguments() ||
clasp == &js_ObjectClass)) {
JSAtom *atom;
if (!createAtom && (obj->isSlowArray() || obj->isArguments() || obj->isObject())) {
atom = js_GetExistingStringAtom(cx, start, JS_ARRAY_END(buf) - start);
if (!atom) {
*idp = JSID_VOID;
@@ -501,13 +495,13 @@ JSBool JS_FASTCALL
js_EnsureDenseArrayCapacity(JSContext *cx, JSObject *obj, jsint i)
{
#ifdef DEBUG
Class *origObjClasp = obj->clasp;
Class *origObjClasp = obj->getClass();
#endif
jsuint u = jsuint(i);
JSBool ret = (obj->ensureDenseArrayElements(cx, u, 1) == JSObject::ED_OK);
/* Partially check the CallInfo's storeAccSet is correct. */
JS_ASSERT(obj->clasp == origObjClasp);
JS_ASSERT(obj->getClass() == origObjClasp);
return ret;
}
/* This function and its callees do not touch any object's .clasp field. */
@@ -989,7 +983,7 @@ array_fix(JSContext *cx, JSObject *obj, bool *success, AutoIdVector *props)
return true;
}
Class js_ArrayClass = {
Class js::ArrayClass = {
"Array",
Class::NON_NATIVE | JSCLASS_HAS_PRIVATE | JSCLASS_HAS_CACHED_PROTO(JSProto_Array),
PropertyStub, /* addProperty */
@@ -1024,7 +1018,7 @@ Class js_ArrayClass = {
}
};
Class js_SlowArrayClass = {
Class js::SlowArrayClass = {
"Array",
JSCLASS_HAS_PRIVATE |
JSCLASS_HAS_CACHED_PROTO(JSProto_Array),
@@ -1069,7 +1063,7 @@ JSObject::makeDenseArraySlow(JSContext *cx)
/* Create a native scope. */
gc::AllocKind kind = getAllocKind();
if (!InitScopeForObject(cx, this, &js_SlowArrayClass, getProto()->getNewType(cx), kind))
if (!InitScopeForObject(cx, this, &SlowArrayClass, getProto()->getNewType(cx), kind))
return false;
backfillDenseArrayHoles(cx);
@@ -1090,7 +1084,7 @@ JSObject::makeDenseArraySlow(JSContext *cx)
JS_ASSERT(!denseArrayHasInlineSlots());
}
capacity = numFixedSlots() + arrayCapacity;
clasp = &js_SlowArrayClass;
clasp = &SlowArrayClass;
/*
* Root all values in the array during conversion, as SlowArrayClass only
@@ -1110,7 +1104,7 @@ JSObject::makeDenseArraySlow(JSContext *cx)
setMap(oldMap);
capacity = arrayCapacity;
initializedLength = arrayInitialized;
clasp = &js_ArrayClass;
clasp = &ArrayClass;
return false;
}
@@ -1133,7 +1127,7 @@ JSObject::makeDenseArraySlow(JSContext *cx)
setMap(oldMap);
capacity = arrayCapacity;
initializedLength = arrayInitialized;
clasp = &js_ArrayClass;
clasp = &ArrayClass;
return false;
}
@@ -1144,7 +1138,7 @@ JSObject::makeDenseArraySlow(JSContext *cx)
/*
* Finally, update class. If |this| is Array.prototype, then js_InitClass
* will create an emptyShape whose class is &js_SlowArrayClass, to ensure
* will create an emptyShape whose class is &SlowArrayClass, to ensure
* that delegating instances can share shapes in the tree rooted at the
* proto's empty shape.
*/
@@ -1211,7 +1205,7 @@ array_toSource(JSContext *cx, uintN argc, Value *vp)
if (!obj)
return false;
if (!obj->isArray()) {
ReportIncompatibleMethod(cx, vp, &js_ArrayClass);
ReportIncompatibleMethod(cx, vp, &ArrayClass);
return false;
}
@@ -3217,12 +3211,12 @@ js_InitArrayClass(JSContext *cx, JSObject *obj)
GlobalObject *global = obj->asGlobal();
JSObject *arrayProto = global->createBlankPrototype(cx, &js_SlowArrayClass);
JSObject *arrayProto = global->createBlankPrototype(cx, &SlowArrayClass);
if (!arrayProto || !AddLengthProperty(cx, arrayProto))
return NULL;
arrayProto->setArrayLength(cx, 0);
JSFunction *ctor = global->createConstructor(cx, js_Array, &js_ArrayClass,
JSFunction *ctor = global->createConstructor(cx, js_Array, &ArrayClass,
CLASS_ATOM(cx, Array), 1);
if (!ctor)
return NULL;
@@ -3257,7 +3251,7 @@ NewArray(JSContext *cx, jsuint length, JSObject *proto)
JS_ASSERT_IF(proto, proto->isArray());
gc::AllocKind kind = GuessObjectGCKind(length, true);
JSObject *obj = detail::NewObject<WithProto::Class, false>(cx, &js_ArrayClass, proto, NULL, kind);
JSObject *obj = detail::NewObject<WithProto::Class, false>(cx, &ArrayClass, proto, NULL, kind);
if (!obj)
return NULL;
@@ -3346,7 +3340,7 @@ JS_DEFINE_CALLINFO_3(extern, OBJECT, NewDenseUnallocatedArray, CONTEXT, UINT32,
JSObject *
NewSlowEmptyArray(JSContext *cx)
{
JSObject *obj = NewNonFunction<WithProto::Class>(cx, &js_SlowArrayClass, NULL, NULL);
JSObject *obj = NewNonFunction<WithProto::Class>(cx, &SlowArrayClass, NULL, NULL);
if (!obj || !AddLengthProperty(cx, obj))
return NULL;