refactor: 删 VmHost 旧内核访问器与 runtime_api 对 kernel 依赖

crates/oxide_runtime_api/src/coercion.rs

@@ -7,13 +7,12 @@
 use std::cmp::Ordering;
 
 use num_traits::{ToPrimitive, Zero};
-use oxide_types::mem::P;
 use oxide_types::object::{JsObject, PropAttributes};
 use oxide_types::private_key::make_int_key;
 use oxide_types::shape::EMPTY_SHAPE_ID;
 use oxide_types::value::{JsType, JsValue};
 
-use crate::host::VmHost;
+use crate::host::{ProtoKind, VmHost};
 
 /// 拼接 JS 错误消息，格式为 `"{name}: {msg}"`；任一段为空时只取非空段。
 pub fn format_error_message(name: &str, msg: &str) -> String {
@@ -774,17 +773,14 @@ pub fn materialize_string_box<H: VmHost>(host: &mut H, obj: &mut JsObject, str_v
     let len = units.len();
     obj.set_boxed_value(str_val);
     for (i, &unit) in units.iter().enumerate() {
-        let shape_id = host
-            .kernel_core()
-            .shape_forge()
-            .make_shape(obj.shape_id(), make_int_key(i as u32));
+        let shape_id = host.make_shape(obj.shape_id(), make_int_key(i as u32));
         obj.set_shape_id(shape_id);
         let ch = host.single_unit(unit).unwrap_or_else(|| host.new_string_units(&[unit]));
         obj.push_prop(ch);
         obj.set_data_meta(i as u32, PropAttributes::new(false, true, false));
     }
-    let length_si = host.kernel_core().perm_interner().intern("length").0;
-    let shape_id = host.kernel_core().shape_forge().make_shape(obj.shape_id(), length_si);
+    let length_si = host.perm_intern("length");
+    let shape_id = host.make_shape(obj.shape_id(), length_si);
     obj.set_shape_id(shape_id);
     obj.push_prop(JsValue::int(len as i32));
     obj.set_data_meta(len as u32, PropAttributes::new(false, false, false));
@@ -803,22 +799,18 @@ pub fn to_object<H: VmHost>(val: JsValue, host: &mut H) -> Result<JsValue, Strin
     if val.is_null() || val.is_undefined() {
         return Err(host.error_message_text("TypeError", "Cannot convert null or undefined to object"));
     }
-    let (proto_ptr, type_tag) = {
-        let session = host.session();
-        let world = session.builtin_world();
-        if val.is_string() {
-            (P::as_ptr(&world.string_proto) as *mut JsObject, JsObject::OBJ_TYPE_STRING_OBJ)
-        } else if val.is_int() || val.is_double() {
-            (P::as_ptr(&world.number_proto) as *mut JsObject, JsObject::OBJ_TYPE_NUMBER_OBJ)
-        } else if val.is_bool() {
-            (P::as_ptr(&world.boolean_proto) as *mut JsObject, JsObject::OBJ_TYPE_BOOLEAN_OBJ)
-        } else if val.is_bigint() {
-            (P::as_ptr(&world.bigint_proto) as *mut JsObject, JsObject::OBJ_TYPE_PLAIN)
-        } else if val.is_symbol() {
-            (P::as_ptr(&world.symbol_proto) as *mut JsObject, JsObject::OBJ_TYPE_SYMBOL_OBJ)
-        } else {
-            (P::as_ptr(&world.object_proto) as *mut JsObject, JsObject::OBJ_TYPE_PLAIN)
-        }
+    let (proto_ptr, type_tag) = if val.is_string() {
+        (host.builtin_proto(ProtoKind::StringProto), JsObject::OBJ_TYPE_STRING_OBJ)
+    } else if val.is_int() || val.is_double() {
+        (host.builtin_proto(ProtoKind::NumberProto), JsObject::OBJ_TYPE_NUMBER_OBJ)
+    } else if val.is_bool() {
+        (host.builtin_proto(ProtoKind::BooleanProto), JsObject::OBJ_TYPE_BOOLEAN_OBJ)
+    } else if val.is_bigint() {
+        (host.builtin_proto(ProtoKind::BigIntProto), JsObject::OBJ_TYPE_PLAIN)
+    } else if val.is_symbol() {
+        (host.builtin_proto(ProtoKind::SymbolProto), JsObject::OBJ_TYPE_SYMBOL_OBJ)
+    } else {
+        (host.builtin_proto(ProtoKind::ObjectProto), JsObject::OBJ_TYPE_PLAIN)
     };
     let proto_val = JsValue::from_js_object(proto_ptr);
     let obj = host.alloc_object(JsObject::new_empty(EMPTY_SHAPE_ID, proto_val));

crates/oxide_runtime_api/src/host.rs

@@ -1,9 +1,7 @@
 //! `VmHost` trait：builtins 依赖的 `Vm` 能力集合，trait 面向泛型而非对象安全。
 
 use std::ffi::c_void;
-use std::sync::Arc;
 
-use oxide_kernel::kernel::{KernelCore, KernelSession};
 use oxide_types::mem::P;
 use oxide_types::object::{Cell, JsObject, PropAttributes};
 use oxide_types::value::JsValue;
@@ -204,14 +202,6 @@ pub trait VmHost {
     /// 读取 BigInt 值；调用方须保证 `val.is_bigint()`。
     fn bigint_value(&mut self, val: JsValue) -> &num_bigint::BigInt;
 
-    // 内核访问器
-    fn kernel_core(&self) -> &Arc<KernelCore>;
-    /// 只读访问当前 session（builtin world 与 global object）。
-    ///
-    /// 返回 `Ref` 守卫（session 入 `RefCell` 后无法再给稳定 `&`）：调用方
-    /// 在单表达式内消费，不跨 `borrow_mut` 长存。
-    fn session(&self) -> std::cell::Ref<'_, KernelSession>;
-
     // 内核能力面（perm interner / shape forge / builtin world / global object）
     /// intern 字符串键，返回其 si（perm interner，零分配共享键空间）。
     fn perm_intern(&self, s: &str) -> u32;

crates/oxide_runtime_api/src/lib.rs

@@ -5,7 +5,7 @@
 //! 实现 `VmHost`。这打破了 builtins crate 与 `oxide_vm` 之间本会形成的
 //! 循环依赖：
 //!
-//! `oxide_types ← oxide_kernel ← oxide_runtime_api ← oxide_builtins ← oxide_vm`
+//! `oxide_types ← oxide_runtime_api ← oxide_builtins ← oxide_vm`
 //!
 //! trait 面向泛型而非对象安全：单态化 `H = Vm` 使每个 `host.*()` 调用内联，
 //! 相对 builtins 直接位于 `oxide_vm` 内部没有运行时开销。