This CL extends GetIterator to check whether the result of
calling @@iterator is JSReceiver and throw SymbolIteratorInvalid
if it's not JSReceiver.
GetIterator bytecode involves 3 steps now:
- method = GetMethod(obj, @@iterator)
- iterator = Call(method, obj)
- if(!IsJSReceiver(iterator)) throw SymbolIteratorInvalid [Added]
New Builtin: CallIteratorWithFeedbackLazyDeoptContinuation, which
is used when lazy deopt is triggered by call @@iterator.
Related spec: https://tc39.es/ecma262/#sec-getiterator.
Related doc: https://docs.google.com/document/d/1s67HC2f-4zxA_s1Bmm7dfwMFv_KDUfMiWIKkNSeQNKw/edit#heading=h.kdzv8mq4g4ks.
Bug: v8:9489
Change-Id: I17952c0f3e24e1e600ee1348809fb188c2c70f8e
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3563447
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: 王澳 <wangao.james@bytedance.com>
Cr-Commit-Position: refs/heads/main@{#80112}
4a285a2549