mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-24 02:31:13 +08:00
fix: 绑定函数状态移入状态对象防哈希槽冲突
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@@ -88,8 +88,7 @@ pub fn function_symbol_has_instance<H: VmHost>(vm: &mut H, args: &[u8]) -> Nativ
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// bound 包装:[[BoundTargetFunction]] 递归到最内层 target 判定
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// (InstanceofOperator 语义,target 链上的 @@hasInstance 解析到本函数)。
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while c_obj.type_tag == oxide_types::object::JsObject::OBJ_TYPE_BOUND {
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let props = c_obj.hash_props_vec().cloned().unwrap_or_default();
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let target = props.get(4).copied().unwrap_or(JsValue::undefined());
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let target = bound_state_values(c_obj).first().copied().unwrap_or(JsValue::undefined());
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if !target.is_object()
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|| target.as_js_object_ptr().is_null()
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|| !unsafe { &*target.as_js_object_ptr() }.is_function()
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@@ -138,16 +137,14 @@ pub fn function_symbol_has_instance<H: VmHost>(vm: &mut H, args: &[u8]) -> Nativ
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fn bind_dispatcher<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let wrapper_val = vm.reg(254);
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let wrapper = unsafe { &*wrapper_val.as_js_object_ptr() };
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// dense 布局:[length, name, caller, arguments, target, thisArg, ...boundArgs]——
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// 前 4 槽是 shape 属性(length/name 数据 + caller/arguments 访问器占位),
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// 绑定状态从槽位 4 起(shape 槽位与 dense 下标对齐)。
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let props = wrapper.hash_props_vec().cloned().unwrap_or_default();
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let bound_target = props.get(4).copied().unwrap_or(JsValue::undefined());
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let bound_this = props.get(5).copied().unwrap_or(JsValue::undefined());
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// 绑定状态对象布局 [target, thisArg, ...boundArgs](见 bound_state_values)。
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let state = bound_state_values(wrapper);
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let bound_target = state.first().copied().unwrap_or(JsValue::undefined());
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let bound_this = state.get(1).copied().unwrap_or(JsValue::undefined());
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// 拼接调用实参:绑定实参(props[6..])在前,本次调用实参(跳过 args[0]
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// 拼接调用实参:绑定实参(存储槽 2+)在前,本次调用实参(跳过 args[0]
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// 即绑定包装器的 receiver)在后,与规范的"绑定实参先于调用实参"一致。
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let mut call_args: Vec<JsValue> = props.iter().skip(6).copied().collect();
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let mut call_args: Vec<JsValue> = state.iter().skip(2).copied().collect();
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for &r in args.iter().skip(1) {
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call_args.push(vm.reg(r));
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}
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@@ -238,8 +235,9 @@ pub fn function_bind<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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(*wrapper).set_native_arg_count(bound_arg_count as u8);
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}
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// length/name 先定义占 dense 槽位 0/1(shape 属性),绑定状态 [target, thisArg,
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// ...boundArgs] 随后从槽位 2 起存放,保证 shape 槽位与 dense 下标对齐。
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// length/name/caller/arguments 先定义占 shape 槽位 0..3(length/name 数据 +
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// caller/arguments 访问器占位);绑定状态随后以独立状态对象存为第 4 号 shape
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// 属性(保留键),不与用户 own 属性共享下标空间。
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let length_si = vm.kernel_core().perm_interner().intern("length").0;
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let name_si = vm.kernel_core().perm_interner().intern("name").0;
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let caller_si = vm.kernel_core().perm_interner().intern("caller").0;
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@@ -293,18 +291,39 @@ pub fn function_bind<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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return NativeResult::Err(crate::error::create_type_error(vm, &e));
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}
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}
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// 绑定状态([target, thisArg, ...boundArgs])存独立状态对象:命名属性存储与
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// shape 槽位共享下标,状态值若直接裸推包装器存储槽 4+,用户新增 own 属性时
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// shape 槽位与存储下标错位(读写互串)。状态对象内部存储不占 shape 槽位,
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// 经保留键作为包装器固定第 4 号 shape 属性暴露,用户代码不可见。
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let object_proto = vm.session().builtin_world().object_proto.as_ptr() as *mut JsObject;
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let state = vm.alloc_object(JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::from_js_object(object_proto)));
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unsafe {
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let props = (*wrapper).ensure_hash_props();
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props.push(target_val);
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props.push(bound_this);
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let state_props = (*state).ensure_hash_props();
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state_props.push(target_val);
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state_props.push(bound_this);
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for &r in args.iter().skip(2) {
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props.push(vm.reg(r));
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state_props.push(vm.reg(r));
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}
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}
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let state_si = vm.kernel_core().perm_interner().intern("\u{0}bound-state").0;
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if let Err(e) = vm.define_data_property(unsafe { &mut *wrapper }, state_si, JsValue::from_js_object(state), attrs) {
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return NativeResult::Err(crate::error::create_type_error(vm, &e));
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}
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NativeResult::Ok(JsValue::from_js_object(wrapper))
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}
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/// 读 bound 包装器固定第 4 号 shape 属性处的状态对象,返回其存储
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/// [target, thisArg, ...boundArgs](缺位时返回空 vec)。
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pub fn bound_state_values(wrapper: &JsObject) -> Vec<JsValue> {
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wrapper
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.hash_props_vec()
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.and_then(|props| props.get(4).copied())
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.filter(|v| v.is_object() && !v.as_js_object_ptr().is_null())
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.and_then(|sv| unsafe { &*sv.as_js_object_ptr() }.hash_props_vec().cloned())
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.unwrap_or_default()
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}
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/// bound 函数 caller/arguments 的受限访问器:任何访问(get/set)都抛 TypeError。
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fn bound_restricted_thrower<H: VmHost>(vm: &mut H, _args: &[u8]) -> NativeResult {
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NativeResult::Err(crate::error::create_type_error(
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