mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-25 03:01:12 +08:00
528 lines
23 KiB
Rust
528 lines
23 KiB
Rust
use crate::vm::{FrameContinuation, Vm, MAX_PROTO_CHAIN_DEPTH};
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use crate::{ic_trace, vm_trace};
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use oxide_runtime_api as coercion;
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use oxide_types::object::{JsObject, PropAttributes, PropMetaEntry};
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use oxide_types::value::JsValue;
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impl Vm {
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pub(crate) fn ordinary_get(
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&mut self, obj: &JsObject, prop_name_si: u32, receiver: JsValue,
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) -> Result<JsValue, String> {
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self.ordinary_get_inner(obj, prop_name_si, receiver, None)
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}
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pub(crate) fn ordinary_get_with_target(
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&mut self, obj: &JsObject, prop_name_si: u32, receiver: JsValue, target_reg: u8,
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) -> Result<JsValue, String> {
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self.ordinary_get_inner(obj, prop_name_si, receiver, Some(target_reg))
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}
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fn ordinary_get_inner(
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&mut self, obj: &JsObject, prop_name_si: u32, receiver: JsValue, target_reg: Option<u8>,
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) -> Result<JsValue, String> {
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vm_trace!("ordinary_get_inner: shape={} prop_si={}", obj.shape_id(), prop_name_si);
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let length_si = self.kernel_core.perm_interner().intern("length").0;
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let mut current = Some(obj);
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let mut depth = 0usize;
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while let Some(obj) = current {
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if obj.is_array() && prop_name_si == length_si {
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return Ok(JsValue::int(obj.prop_count() as i32));
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}
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if obj.is_array() {
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if let Some(index) = self.array_index_from_property_key(prop_name_si) {
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// 数组元素区：hole（删除标记）视为不存在，落到原型链。
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if index < obj.array_prop_count && !obj.prop_meta_at(index).is_some_and(|m| m.is_hole()) {
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// 数组元素为访问器属性（defineProperty getter）时须触发
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// getter，而非直接读数据槽。
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if let Some(meta) = obj.prop_meta_at(index) {
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if meta.is_accessor {
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return if meta.get.is_undefined() {
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Ok(JsValue::undefined())
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} else if let Some(tr) = target_reg {
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let getter = meta.get;
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let pushed = self.push_bytecode_getter_frame(getter, receiver, tr)?;
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if pushed {
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return Ok(JsValue::undefined());
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}
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Ok(self.regs[tr as usize])
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} else {
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self.call_function_sync(meta.get, receiver, &[])
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};
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}
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}
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return Ok(obj.get_prop_at(index));
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}
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}
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}
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if obj.is_typed_array_obj() {
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if let Some(index) = self.array_index_from_property_key(prop_name_si) {
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return oxide_builtins::typed_array::typed_array_element_get(self, obj, index);
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}
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}
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if let Some(pos) = self.get_own_property_slot(obj, prop_name_si) {
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if let Some(meta) = obj.prop_meta_at(pos) {
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if meta.is_accessor {
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return if meta.get.is_undefined() {
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Ok(JsValue::undefined())
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} else if let Some(tr) = target_reg {
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let getter = meta.get;
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let pushed = self.push_bytecode_getter_frame(getter, receiver, tr)?;
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if pushed {
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return Ok(JsValue::undefined());
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}
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Ok(self.regs[tr as usize])
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} else {
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self.call_function_sync(meta.get, receiver, &[])
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};
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}
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}
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return Ok(obj.get_prop_at(pos));
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}
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if depth >= MAX_PROTO_CHAIN_DEPTH {
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break;
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}
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depth += 1;
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let proto = obj.proto();
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current = proto.is_object().then(|| unsafe { &*proto.as_js_object_ptr() });
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if let Some(proto_obj) = current {
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vm_trace!("ordinary_get proto step: depth={} shape={}", depth, proto_obj.shape_id());
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}
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}
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Ok(JsValue::undefined())
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}
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pub(crate) fn push_bytecode_getter_frame(
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&mut self, getter: JsValue, receiver: JsValue, target_reg: u8,
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) -> Result<bool, String> {
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vm_trace!(
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"push_bytecode_getter_frame: target_reg={} native={}",
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target_reg,
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getter.is_object() && unsafe { &*getter.as_js_object_ptr() }.native_fn().is_some()
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);
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if !getter.is_object() {
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return Err(self.error_message_text("TypeError", "getter is not callable"));
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}
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let getter_obj = unsafe { &*getter.as_js_object_ptr() };
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if !getter_obj.is_function() {
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return Err(self.error_message_text("TypeError", "getter is not callable"));
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}
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if getter_obj.native_fn().is_some() {
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let result = match self.call_function_sync(getter, receiver, &[]) {
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Ok(v) => v,
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Err(err) => self.raise_call_error(&err)?,
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};
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self.regs[target_reg as usize] = result;
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return Ok(false);
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}
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self.push_bytecode_frame(
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getter,
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receiver,
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&[],
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None,
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None,
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JsValue::undefined(),
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FrameContinuation::AccessorGet { target_reg },
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)?;
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self.accessor_frame_target_reg = Some(target_reg);
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Ok(true)
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}
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fn inherited_property_meta(&self, obj: &JsObject, prop_name_si: u32) -> Option<PropMetaEntry> {
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vm_trace!("inherited_property_meta: shape={} prop_si={}", obj.shape_id(), prop_name_si);
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let mut proto = obj.proto();
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let mut depth = 0usize;
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while proto.is_object() && depth < MAX_PROTO_CHAIN_DEPTH {
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depth += 1;
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let proto_obj = unsafe { &*proto.as_js_object_ptr() };
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if let Some(pos) = self.get_own_property_slot(proto_obj, prop_name_si) {
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return proto_obj.prop_meta_at(pos);
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}
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proto = proto_obj.proto();
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}
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None
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}
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pub(crate) fn ordinary_set(
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&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue, receiver: JsValue,
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) -> Result<(), String> {
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let val = self.promote_if_needed_for_write_ptr(obj as *mut JsObject, val);
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self.ordinary_set_inner(obj, prop_name_si, val, receiver, false)
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}
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/// 分发期入口：调用方（dispatch_set_prop 等）已对值做过 promote。
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pub(crate) fn ordinary_set_dispatch(
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&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue, receiver: JsValue,
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) -> Result<(), String> {
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self.ordinary_set_inner(obj, prop_name_si, val, receiver, true)
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}
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fn ordinary_set_inner(
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&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue, receiver: JsValue, use_frame_push: bool,
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) -> Result<(), String> {
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vm_trace!(
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"ordinary_set_inner: shape={} prop_si={} frame_push={}",
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obj.shape_id(),
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prop_name_si,
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use_frame_push
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);
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// TypedArray 整数索引：receiver 为 TA 本体时写底层 buffer（越界静默忽略）；
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// receiver 非 TA 时按规范把写入落到 receiver 对象，不碰 TA buffer。
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if obj.is_typed_array_obj() {
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if let Some(index) = self.array_index_from_property_key(prop_name_si) {
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if receiver.as_js_object_ptr() != obj as *const JsObject as *mut JsObject {
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return self.set_to_receiver(obj, prop_name_si, val, receiver, index as usize, use_frame_push);
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}
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return oxide_builtins::typed_array::typed_array_element_set(self, obj, index, val);
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}
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}
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if let Some(pos) = self.get_own_property_slot(obj, prop_name_si) {
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if let Some(meta) = obj.prop_meta_at(pos) {
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if meta.is_accessor {
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if meta.set.is_undefined() {
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return self.raise_type_error("property has no setter");
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}
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return self.call_or_push_setter(meta.set, receiver, val, use_frame_push);
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}
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if !meta.attributes.writable() {
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return self.raise_type_error("cannot assign to read-only property");
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}
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}
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// pos 是存储索引（get_own_property_slot 对数组已加元素区偏移）。
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obj.set_prop_storage(pos as usize, val);
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return Ok(());
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}
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if let Some(meta) = self.inherited_property_meta(obj, prop_name_si) {
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if meta.is_accessor {
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if meta.set.is_undefined() {
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return self.raise_type_error("property has no setter");
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}
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return self.call_or_push_setter(meta.set, receiver, val, use_frame_push);
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}
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if !meta.attributes.writable() {
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return self.raise_type_error("cannot assign to read-only property");
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}
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}
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self.set_or_create_prop_value(obj, prop_name_si, val);
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Ok(())
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}
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/// TypedArray 整数索引在 `receiver` ≠ TA 时的 [[Set]] 语义：越界或非对象
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/// receiver 直接返回 true（不写、不 ToNumber）；界内对象 receiver 走普通 set
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/// 把属性落到 receiver 自身。
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fn set_to_receiver(
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&mut self, ta_obj: &mut JsObject, prop_name_si: u32, val: JsValue, receiver: JsValue, index: usize,
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use_frame_push: bool,
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) -> Result<(), String> {
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let Some((_, length)) = oxide_builtins::typed_array::typed_array_integer_index(self, ta_obj, prop_name_si)
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else {
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return Ok(());
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};
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if index >= length {
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return Ok(());
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}
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let receiver_ptr = receiver.as_js_object_ptr();
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if receiver_ptr.is_null() {
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return Ok(());
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}
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let promoted = self.promote_if_needed_for_write_ptr(receiver_ptr, val);
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let receiver_obj = unsafe { &mut *receiver_ptr };
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self.ordinary_set_inner(receiver_obj, prop_name_si, promoted, receiver, use_frame_push)
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}
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pub(crate) fn call_or_push_setter(
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&mut self, setter: JsValue, receiver: JsValue, val: JsValue, use_frame_push: bool,
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) -> Result<(), String> {
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vm_trace!("call_or_push_setter: frame_push={}", use_frame_push);
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// native setter 抛错经 call_function_sync 以 String 返回（未 unwind）——
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// 在此经 raise_call_error 恢复为可捕获的 JS 异常（与 getter 路径对称）。
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let call_native = |vm: &mut Self| -> Result<(), String> {
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if let Err(err) = vm.call_function_sync(setter, receiver, &[val]) {
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vm.raise_call_error(&err)?;
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}
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Ok(())
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};
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if !use_frame_push {
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return call_native(self);
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}
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if !setter.is_object() {
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return self.raise_type_error("setter is not callable");
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}
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let setter_obj = unsafe { &*setter.as_js_object_ptr() };
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if !setter_obj.is_function() {
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return self.raise_type_error("setter is not callable");
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}
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if setter_obj.native_fn().is_some() {
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return call_native(self);
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}
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self.push_bytecode_frame(
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setter,
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receiver,
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&[val],
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None,
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None,
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JsValue::undefined(),
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FrameContinuation::AccessorSet,
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)?;
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Ok(())
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}
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pub(crate) fn read_member_prop(
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&mut self, obj: &JsObject, prop_name_si: u32, receiver: JsValue,
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) -> Result<JsValue, String> {
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vm_trace!("read_member_prop: shape_id={} prop_name_si={}", obj.shape_id(), prop_name_si);
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let ext0 = self.bytecode[self.pc];
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let ext1 = self.bytecode[self.pc + 1];
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let ext2 = self.bytecode[self.pc + 2];
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self.pc += 3;
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let ic_pc = self.pc;
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if obj.has_prop_meta() {
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return self.ordinary_get(obj, prop_name_si, receiver);
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}
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let cached_shape_id = ext0 & 0x00FF_FFFF;
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let cached_slot = ext1;
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let cached_depth = (ext2 & 0xFF) as u8;
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let val = if let Some(v) = crate::ic_helper::ic_get_hit(obj, cached_shape_id, cached_slot, cached_depth) {
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v
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} else if let Some(template) = self.kernel_core.prop_forge().get_template(obj.shape_id()) {
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if template.prop_name != prop_name_si {
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self.proto_chain_ic_get(obj, prop_name_si, receiver)?
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} else if template.position < obj.prop_vec_len() as u32 {
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crate::ic_helper::write_ic_back(self.bytecode_mut(), ic_pc, obj.shape_id(), template.position, 0);
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obj.get_prop_shape(template.position)
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} else {
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self.proto_chain_ic_get(obj, prop_name_si, receiver)?
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}
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} else {
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self.proto_chain_ic_get(obj, prop_name_si, receiver)?
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};
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Ok(val)
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}
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/// 执行 ordinary_get 并把 IC 按原型链深度写回。
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fn proto_chain_ic_get(&mut self, obj: &JsObject, prop_name_si: u32, receiver: JsValue) -> Result<JsValue, String> {
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let ic_pc = self.pc;
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let resolved = self.ordinary_get(obj, prop_name_si, receiver)?;
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// 快路径：自身属性（depth=0）。
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if let Some(pos) = self.kernel_core.shape_forge().lookup_position(obj.shape_id(), prop_name_si) {
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if !obj.is_accessor_meta(pos) {
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crate::ic_helper::write_ic_back(self.bytecode_mut(), ic_pc, obj.shape_id(), pos, 0);
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}
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return Ok(resolved);
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}
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// 沿原型链查找继承属性。
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let mut cursor = obj.proto().as_js_object_ptr();
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let mut depth = 1u8;
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while !cursor.is_null() {
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let co = unsafe { &*cursor };
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if let Some(pos) = self.kernel_core.shape_forge().lookup_position(co.shape_id(), prop_name_si) {
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if !co.is_accessor_meta(pos) {
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crate::ic_helper::write_ic_back(self.bytecode_mut(), ic_pc, co.shape_id(), pos, depth);
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}
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break;
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}
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if !co.proto().is_object() {
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break;
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}
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cursor = co.proto().as_js_object_ptr();
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depth += 1;
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}
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Ok(resolved)
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}
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pub(crate) fn set_member_prop(
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&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue, receiver: JsValue,
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) -> Result<(), String> {
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ic_trace!("set_member_prop: shape_id={} prop_name_si={}", obj.shape_id(), prop_name_si);
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let ic_pc = self.pc;
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let val = self.promote_if_needed_for_write_ptr(obj as *mut JsObject, val);
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if let Some(pos) = self.kernel_core.shape_forge().lookup_position(obj.shape_id(), prop_name_si) {
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if obj.has_prop_meta() {
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self.ordinary_set(obj, prop_name_si, val, receiver)?;
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return Ok(());
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}
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obj.set_prop_shape(pos, val);
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crate::ic_helper::write_ic_back(self.bytecode_mut(), ic_pc, obj.shape_id(), pos, 0);
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} else {
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self.ordinary_set(obj, prop_name_si, val, receiver)?;
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}
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Ok(())
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}
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pub(crate) fn set_or_create_prop_value(&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue) {
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vm_trace!("set_or_create_prop_value: shape_id={} prop_name_si={}", obj.shape_id(), prop_name_si);
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// TypedArray 整数索引写 buffer（越界忽略），不进入 shape/prop 槽。
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if obj.is_typed_array_obj() {
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if let Some(index) = self.array_index_from_property_key(prop_name_si) {
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let _ = oxide_builtins::typed_array::typed_array_element_set(self, obj, index, val);
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return;
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}
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}
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// 数组下标键写入元素区（维护 array_prop_count），不进入 shape 链。
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if obj.is_array() {
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if let Some(index) = self.array_index_from_property_key(prop_name_si) {
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obj.set_prop_at(index, val);
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return;
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}
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}
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if let Some(pos) = self.kernel_core.shape_forge().lookup_position(obj.shape_id(), prop_name_si) {
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obj.set_prop_shape(pos, val);
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} else {
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let new_shape_id = self.kernel_core.shape_forge().make_shape(obj.shape_id(), prop_name_si);
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obj.set_shape_id(new_shape_id);
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// 数组对象：属性追加到 hash_props 属性区（元素之后），array_prop_count 不变。
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obj.push_prop(val);
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obj.bump_generation();
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}
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}
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pub(crate) fn define_data_property(
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&mut self, obj: &mut JsObject, prop_name_si: u32, val: JsValue, attributes: PropAttributes,
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) -> Result<(), String> {
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vm_trace!("define_data_property: shape={} prop_si={}", obj.shape_id(), prop_name_si);
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let val = self.promote_if_needed_for_write_ptr(obj as *mut JsObject, val);
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// TypedArray 整数索引：走元素定义（界内写 buffer，越界/非法描述符拒绝）。
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if obj.is_typed_array_obj() {
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if let Some(index) = self.array_index_from_property_key(prop_name_si) {
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return oxide_builtins::typed_array::typed_array_element_define(self, obj, index, val);
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}
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}
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if obj.is_array() {
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if let Some(index) = self.array_index_from_property_key(prop_name_si) {
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// 数组索引属性存元素区并维护 array_prop_count（元素数随索引增长）。
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return self.define_array_index_element(
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obj,
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index,
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val,
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attributes,
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false,
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JsValue::undefined(),
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JsValue::undefined(),
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);
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}
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}
|
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let pos = if let Some(pos) = self.kernel_core.shape_forge().lookup_position(obj.shape_id(), prop_name_si) {
|
||
// shape 槽位 → 存储索引（数组属性在元素区之后）。
|
||
if obj.is_array() {
|
||
obj.array_prop_count as usize + pos as usize
|
||
} else {
|
||
pos as usize
|
||
}
|
||
} else {
|
||
let new_shape_id = self.kernel_core.shape_forge().make_shape(obj.shape_id(), prop_name_si);
|
||
obj.set_shape_id(new_shape_id);
|
||
obj.push_prop(JsValue::undefined()) as usize
|
||
};
|
||
if let Some(current) = obj.prop_meta_at(pos) {
|
||
if !current.attributes.configurable() {
|
||
if current.is_accessor {
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
if current.attributes.enumerable() != attributes.enumerable() {
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
if !current.attributes.writable()
|
||
&& (attributes.writable() || !coercion::same_value(obj.get_prop_at(pos), val))
|
||
{
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
if current.attributes.configurable() != attributes.configurable() {
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
}
|
||
}
|
||
obj.set_prop_storage(pos, val);
|
||
obj.set_data_meta(pos, attributes);
|
||
obj.bump_generation();
|
||
Ok(())
|
||
}
|
||
|
||
pub(crate) fn define_accessor_property(
|
||
&mut self, obj: &mut JsObject, prop_name_si: u32, get: JsValue, set: JsValue, attributes: PropAttributes,
|
||
) -> Result<(), String> {
|
||
vm_trace!("define_accessor_property: shape={} prop_si={}", obj.shape_id(), prop_name_si);
|
||
let target_ptr = obj as *mut JsObject;
|
||
let get = self.promote_if_needed_for_write_ptr(target_ptr, get);
|
||
let set = self.promote_if_needed_for_write_ptr(target_ptr, set);
|
||
if obj.is_array() {
|
||
if let Some(index) = self.array_index_from_property_key(prop_name_si) {
|
||
return self.define_array_index_element(obj, index, JsValue::undefined(), attributes, true, get, set);
|
||
}
|
||
}
|
||
let pos = if let Some(pos) = self.kernel_core.shape_forge().lookup_position(obj.shape_id(), prop_name_si) {
|
||
// shape 槽位 → 存储索引（数组属性在元素区之后）。
|
||
if obj.is_array() {
|
||
obj.array_prop_count as usize + pos as usize
|
||
} else {
|
||
pos as usize
|
||
}
|
||
} else {
|
||
let new_shape_id = self.kernel_core.shape_forge().make_shape(obj.shape_id(), prop_name_si);
|
||
obj.set_shape_id(new_shape_id);
|
||
obj.push_prop(JsValue::undefined()) as usize
|
||
};
|
||
if let Some(current) = obj.prop_meta_at(pos) {
|
||
if !current.attributes.configurable()
|
||
&& (!current.is_accessor
|
||
|| current.attributes.enumerable() != attributes.enumerable()
|
||
|| current.attributes.configurable() != attributes.configurable()
|
||
|| current.get != get
|
||
|| current.set != set)
|
||
{
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
}
|
||
obj.set_prop_storage(pos, JsValue::undefined());
|
||
obj.set_accessor_meta(pos, get, set, attributes);
|
||
obj.bump_generation();
|
||
Ok(())
|
||
}
|
||
|
||
/// 数组索引属性（`"0"`~`"4294967294"`）的 define 路径：存入元素区并维护
|
||
/// `array_prop_count`（length 随最高索引增长），meta 与元素槽对齐。
|
||
fn define_array_index_element(
|
||
&mut self, obj: &mut JsObject, index: u32, val: JsValue, attributes: PropAttributes, is_accessor: bool,
|
||
get: JsValue, set: JsValue,
|
||
) -> Result<(), String> {
|
||
let pos = index as usize;
|
||
if pos > oxide_types::object::MAX_DENSE_PROPS {
|
||
return Err("array index out of dense range".to_string());
|
||
}
|
||
let pos = pos as u32;
|
||
if let Some(current) = obj.prop_meta_at(pos) {
|
||
if !current.attributes.configurable() {
|
||
if current.is_accessor != is_accessor {
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
if current.attributes.enumerable() != attributes.enumerable() {
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
if current.attributes.configurable() != attributes.configurable() {
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
if is_accessor {
|
||
if current.get != get || current.set != set {
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
} else if !current.attributes.writable()
|
||
&& (attributes.writable() || !coercion::same_value(obj.get_prop_at(pos), val))
|
||
{
|
||
return Err("cannot redefine non-configurable property".to_string());
|
||
}
|
||
}
|
||
}
|
||
obj.set_prop_at(pos, val);
|
||
if is_accessor {
|
||
obj.set_accessor_meta(pos, get, set, attributes);
|
||
} else {
|
||
obj.set_data_meta(pos, attributes);
|
||
}
|
||
obj.bump_generation();
|
||
Ok(())
|
||
}
|
||
}
|