void
js::CheckLocalUnaliased(MaybeCheckAliasing checkAliasing, JSScript *script,
StaticBlockObject *maybeBlock, unsigned i)
{
if (!checkAliasing)
return;
JS_ASSERT(i < script->nslots);
if (i < script->nfixed) {
JS_ASSERT(!script->varIsAliased(i));
} else {
unsigned depth = i - script->nfixed;
for (StaticBlockObject *b = maybeBlock; b; b = b->enclosingBlock()) {
if (b->containsVarAtDepth(depth)) {
JS_ASSERT(!b->isAliased(depth - b->stackDepth()));
break;
}
}
}
}
bool
js::XDRStaticBlockObject(JSXDRState *xdr, JSScript *script, StaticBlockObject **objp)
{
JSContext *cx = xdr->cx;
StaticBlockObject *obj = NULL;
uint32_t parentId = 0;
uint32_t count = 0;
uint32_t depthAndCount = 0;
if (xdr->mode == JSXDR_ENCODE) {
obj = *objp;
parentId = JSScript::isValidOffset(script->objectsOffset)
? FindObjectIndex(script->objects(), obj->enclosingBlock())
: NO_PARENT_INDEX;
uint32_t depth = obj->stackDepth();
JS_ASSERT(depth <= UINT16_MAX);
count = obj->slotCount();
JS_ASSERT(count <= UINT16_MAX);
depthAndCount = (depth << 16) | uint16_t(count);
}
/* First, XDR the parent atomid. */
if (!JS_XDRUint32(xdr, &parentId))
return false;
if (xdr->mode == JSXDR_DECODE) {
obj = StaticBlockObject::create(cx);
if (!obj)
return false;
*objp = obj;
/*
* If there's a parent id, then get the parent out of our script's
* object array. We know that we XDR block object in outer-to-inner
* order, which means that getting the parent now will work.
*/
obj->setEnclosingBlock(parentId == NO_PARENT_INDEX
? NULL
: &script->getObject(parentId)->asStaticBlock());
}
AutoObjectRooter tvr(cx, obj);
if (!JS_XDRUint32(xdr, &depthAndCount))
return false;
if (xdr->mode == JSXDR_DECODE) {
uint32_t depth = uint16_t(depthAndCount >> 16);
count = uint16_t(depthAndCount);
obj->setStackDepth(depth);
/*
* XDR the block object's properties. We know that there are 'count'
* properties to XDR, stored as id/shortid pairs.
*/
for (unsigned i = 0; i < count; i++) {
JSAtom *atom;
if (!js_XDRAtom(xdr, &atom))
return false;
/* The empty string indicates an int id. */
jsid id = atom != cx->runtime->emptyString
? ATOM_TO_JSID(atom)
: INT_TO_JSID(i);
bool redeclared;
if (!obj->addVar(cx, id, i, &redeclared)) {
JS_ASSERT(!redeclared);
return false;
}
}
} else {