feat: 新增 Proxy 对象标签与状态盒的垃圾回收接线

Cargo.lock

@@ -1160,7 +1160,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_builtins"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "chrono",
  "fast-float",
@@ -1185,7 +1185,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_bytecode"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "num-bigint",
  "oxide_log",
@@ -1193,7 +1193,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cfg"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_emit",
@@ -1204,7 +1204,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_cli"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "ansi_term",
  "bumpalo",
@@ -1228,7 +1228,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_code_cache"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "lru",
  "oxide_bytecode",
@@ -1237,7 +1237,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_compiler"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1258,7 +1258,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_dce"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1272,7 +1272,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_emit"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "num-bigint",
  "oxc_allocator",
@@ -1288,7 +1288,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_engine"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1300,7 +1300,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_fold"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "num-bigint",
  "oxide_bytecode",
@@ -1312,7 +1312,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_ir"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_log",
@@ -1321,7 +1321,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_kernel"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1335,7 +1335,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_liveness"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1347,7 +1347,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_log"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "tracing",
  "tracing-appender",
@@ -1356,11 +1356,11 @@ dependencies = [
 
 [[package]]
 name = "oxide_net"
-version = "0.20.3"
+version = "0.20.4"
 
 [[package]]
 name = "oxide_parser"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxc_allocator",
  "oxc_ast",
@@ -1375,7 +1375,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_regalloc"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_cfg",
@@ -1391,7 +1391,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_runtime_api"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "num-bigint",
  "num-traits",
@@ -1404,7 +1404,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_test262"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "oxide_bytecode",
  "oxide_compiler",
@@ -1424,7 +1424,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_types"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "bumpalo",
  "dashmap",
@@ -1437,7 +1437,7 @@ dependencies = [
 
 [[package]]
 name = "oxide_vm"
-version = "0.20.3"
+version = "0.20.4"
 dependencies = [
  "bumpalo",
  "chrono",

Cargo.toml

@@ -25,7 +25,7 @@ members = [
 ]
 
 [workspace.package]
-version = "0.20.3"
+version = "0.20.4"
 edition = "2021"
 license = "MIT"
 rust-version = "1.80"

crates/oxide_types/src/object.rs

@@ -240,6 +240,9 @@ impl JsObject {
     pub const OBJ_TYPE_ERROR_EVENT: u8 = 37;
     /// CustomEvent 对象：事件派生类载荷盒（detail 边）存于 `native_fn` 槽。
     pub const OBJ_TYPE_CUSTOM_EVENT: u8 = 38;
+    /// Proxy 对象：target 与 handler 存于 `native_data` 载荷盒（`oxide_vm` 的
+    /// ProxyState），全部 trap 经 handler 路由；revoked 位记入同一载荷盒。
+    pub const OBJ_TYPE_PROXY: u8 = 39;
     /// `is_session_epoch` 字段中的 session 标记位。
     pub const SESSION_EPOCH_BIT: u8 = 0x01;
     /// `is_session_epoch` 字段中的 GC 标记位。
@@ -332,6 +335,11 @@ impl JsObject {
     pub fn is_event_obj(&self) -> bool {
         self.type_tag == Self::OBJ_TYPE_EVENT
     }
+    /// 是否 Proxy 对象（`native_data` 槽存 target 与 handler 的载荷盒）。
+    #[inline]
+    pub fn is_proxy_obj(&self) -> bool {
+        self.type_tag == Self::OBJ_TYPE_PROXY
+    }
     /// 是否 DataView 对象。
     #[inline]
     pub fn is_data_view_obj(&self) -> bool {

crates/oxide_vm/src/lib.rs

@@ -27,6 +27,8 @@ pub mod native;
 mod native_box_dispatch;
 /// Promise 运行时（状态盒 + 微任务队列 + 构造器/方法实现）。
 pub mod promise;
+/// Proxy 状态盒（native_data 载荷盒）与 session GC 三类接线。
+mod proxy;
 /// 每 VM 的 realm 组合：内核会话、session GC 簿记与 10 个内建原型槽。
 mod realm;
 /// session 级 mark-sweep GC：标记-清扫 session arena 对象与 session 字符串。

crates/oxide_vm/src/native_box_dispatch.rs

@@ -1,7 +1,7 @@
 //! native 载荷家族的单点分类与每家族边函数引用（家族表）。
 //!
 //! 分类是复合谓词：header 位（map/set/module_ns）优先于 `type_tag`，
-//! 两维互斥、一个对象至多归入一个家族。tag 维显式枚举全部 0..=38，
+//! 两维互斥、一个对象至多归入一个家族。tag 维显式枚举全部 0..=39，
 //! 未登记 tag panic。
 //!
 //! 关键约定：
@@ -16,7 +16,7 @@ use oxide_types::value::JsValue;
 
 /// native 载荷家族。
 ///
-/// 21 个 native 家族 + 空家族；空家族是无 native 盒类型的显式归类结果。
+/// 22 个 native 家族 + 空家族；空家族是无 native 盒类型的显式归类结果。
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub(crate) enum NativeBoxFamily {
     /// 无 native 载荷盒。
@@ -63,6 +63,8 @@ pub(crate) enum NativeBoxFamily {
     CustomEvent,
     /// mapped arguments 对象（tag 20，同步状态盒存 `native_data`，无引用边）。
     Arguments,
+    /// Proxy 对象（tag 39，target 与 handler 载荷盒存 `native_data`）。
+    Proxy,
 }
 
 /// 一个家族的边操作集（每家族函数引用，单一注册面）。
@@ -95,7 +97,7 @@ pub(crate) fn classify(obj: &JsObject) -> NativeBoxFamily {
 /// 按类型 tag 分类 native 载荷家族。
 ///
 /// # 边界与前提
-/// - 0..=38 全 tag 显式枚举；未登记 tag（39 及以上）panic。
+/// - 0..=39 全 tag 显式枚举；未登记 tag（40 及以上）panic。
 pub(crate) fn classify_by_tag(tag: u8) -> NativeBoxFamily {
     match tag {
         JsObject::OBJ_TYPE_ARRAY_BUFFER => NativeBoxFamily::ArrayBuffer,
@@ -138,6 +140,7 @@ pub(crate) fn classify_by_tag(tag: u8) -> NativeBoxFamily {
         JsObject::OBJ_TYPE_MESSAGE_EVENT => NativeBoxFamily::MessageEvent,
         JsObject::OBJ_TYPE_ERROR_EVENT => NativeBoxFamily::ErrorEvent,
         JsObject::OBJ_TYPE_CUSTOM_EVENT => NativeBoxFamily::CustomEvent,
+        JsObject::OBJ_TYPE_PROXY => NativeBoxFamily::Proxy,
         _ => panic!("unregistered type tag: {tag}"),
     }
 }
@@ -269,6 +272,12 @@ pub(crate) fn ops_for(family: NativeBoxFamily) -> NativeBoxOps {
             string_edges: None,
             cell_edges: None,
         },
+        // Proxy 载荷盒：target 与 handler 两条对象边（mark 期经家族表自动传播）。
+        NativeBoxFamily::Proxy => NativeBoxOps {
+            object_edges: Some(crate::proxy::proxy_native_edges),
+            string_edges: None,
+            cell_edges: None,
+        },
     }
 }
 
@@ -305,13 +314,14 @@ mod tests {
             JsObject::OBJ_TYPE_ERROR_EVENT => NativeBoxFamily::ErrorEvent,
             JsObject::OBJ_TYPE_CUSTOM_EVENT => NativeBoxFamily::CustomEvent,
             JsObject::OBJ_TYPE_ARGUMENTS => NativeBoxFamily::Arguments,
+            JsObject::OBJ_TYPE_PROXY => NativeBoxFamily::Proxy,
             _ => NativeBoxFamily::None,
         }
     }
 
     #[test]
     fn tag_dimension_every_tag_hits_exactly_one_family() {
-        for tag in 0..=38u8 {
+        for tag in 0..=39u8 {
             let obj = obj_with_tag(tag);
             let family = classify(&obj);
             assert_eq!(family, expected_family_for_tag(tag), "tag {tag} 家族不一致");
@@ -345,7 +355,7 @@ mod tests {
     #[test]
     #[should_panic(expected = "unregistered type tag")]
     fn unregistered_tag_panics() {
-        let obj = obj_with_tag(39);
+        let obj = obj_with_tag(40);
         classify(&obj);
     }
 }

crates/oxide_vm/src/proxy.rs

@@ -0,0 +1,135 @@
+//! Proxy 状态盒：Proxy 对象 `native_data` 槽的载荷盒（target、handler、revoked
+//! 位）与 session GC 三类接线——值边、字节核算与释放。
+
+use oxide_types::object::JsObject;
+use oxide_types::value::JsValue;
+
+/// Proxy 状态盒：存于 Proxy 对象 `native_data`，target 与 handler 是 GC 边，
+/// revoked 位标记已撤销状态（撤销后全部 trap 抛 TypeError）。
+///
+/// 生命周期与 Proxy 对象一致：构造期经 `Box::into_raw` 分配，GC drop 链释放，
+/// 此后不替换。
+pub(crate) struct ProxyState {
+    /// 目标对象（GC 边）。
+    pub(crate) target: JsValue,
+    /// 处理器对象（GC 边）。
+    pub(crate) handler: JsValue,
+    /// 撤销位：置位后所有 trap 派发抛 TypeError。
+    #[allow(dead_code)] // 读方为 trap 派发路径，随该路径接线启用
+    pub(crate) revoked: bool,
+}
+
+/// 读 Proxy 状态盒（盒未建立时 None）。
+pub(crate) fn proxy_state_ref(obj: &JsObject) -> Option<&ProxyState> {
+    let ptr = obj.native_data() as *const ProxyState;
+    if ptr.is_null() {
+        None
+    } else {
+        // SAFETY: native_data 由 Box::into_raw 分配，生命周期与 Proxy 对象一致。
+        Some(unsafe { &*ptr })
+    }
+}
+
+/// 可变访问 Proxy 状态盒（写 revoked 位）。
+#[allow(dead_code)] // 写方为构造器与 revocable 路径，随该路径接线启用
+pub(crate) fn proxy_state_mut(obj: &mut JsObject) -> Option<&mut ProxyState> {
+    let ptr = obj.native_data() as *mut ProxyState;
+    if ptr.is_null() {
+        None
+    } else {
+        // SAFETY: native_data 由 Box::into_raw 分配，生命周期与 Proxy 对象一致。
+        Some(unsafe { &mut *ptr })
+    }
+}
+
+/// Proxy 状态盒内全部值边（GC mark 边）：target 与 handler。
+pub(crate) fn proxy_native_edges(obj: &JsObject) -> Vec<JsValue> {
+    let Some(state) = proxy_state_ref(obj) else {
+        return Vec::new();
+    };
+    vec![state.target, state.handler]
+}
+
+/// 只读核算 Proxy 状态盒字节（不释放），供 GC 账目核算。
+pub(crate) fn proxy_native_size(obj: &JsObject) -> u64 {
+    if !obj.is_proxy_obj() {
+        return 0;
+    }
+    let ptr = obj.native_data() as *mut ProxyState;
+    if ptr.is_null() {
+        return 0;
+    }
+    // SAFETY: 非 Proxy 与空指针已早退，ptr 非空且指向存活 Box<ProxyState>，此处只读不释放。
+    std::mem::size_of::<ProxyState>() as u64
+}
+
+/// 释放 Proxy 状态盒（对象被回收时），返回释放字节数。
+pub(crate) fn drop_proxy_native(obj: &JsObject) -> u64 {
+    let bytes = proxy_native_size(obj);
+    if bytes == 0 {
+        return 0;
+    }
+    let ptr = obj.native_data() as *mut ProxyState;
+    // SAFETY: ptr 非空（proxy_native_size 已验证），Box::from_raw 恰好释放一次。
+    let state = unsafe { Box::from_raw(ptr) };
+    drop(state);
+    bytes
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use oxide_types::shape::EMPTY_SHAPE_ID;
+
+    /// 建一个带状态盒的 Proxy 对象（测试构造路径，不经 Vm 分配）。
+    fn proxy_obj(target: JsValue, handler: JsValue) -> JsObject {
+        let mut obj = JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::undefined());
+        obj.type_tag = JsObject::OBJ_TYPE_PROXY;
+        let state = Box::new(ProxyState {
+            target,
+            handler,
+            revoked: false,
+        });
+        obj.set_native_data(Box::into_raw(state) as *mut u8);
+        obj
+    }
+
+    /// 堆分配一个普通对象值，作 GC 边占位。
+    fn plain_obj_value() -> JsValue {
+        let obj = Box::new(JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::undefined()));
+        JsValue::from_js_object(Box::into_raw(obj))
+    }
+
+    #[test]
+    fn proxy_native_edges_return_target_and_handler() {
+        let target = plain_obj_value();
+        let handler = plain_obj_value();
+        let obj = proxy_obj(target, handler);
+        assert_eq!(proxy_native_edges(&obj), vec![target, handler]);
+    }
+
+    #[test]
+    fn proxy_native_size_and_drop_account_box_bytes() {
+        let obj = proxy_obj(plain_obj_value(), plain_obj_value());
+        let bytes = proxy_native_size(&obj);
+        assert_eq!(bytes, std::mem::size_of::<ProxyState>() as u64);
+        assert_eq!(drop_proxy_native(&obj), bytes);
+    }
+
+    #[test]
+    fn proxy_native_size_is_zero_for_non_proxy() {
+        let obj = JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::undefined());
+        assert_eq!(proxy_native_size(&obj), 0);
+        assert_eq!(drop_proxy_native(&obj), 0);
+    }
+
+    #[test]
+    fn proxy_state_revoked_bit_roundtrip() {
+        let mut obj = proxy_obj(plain_obj_value(), plain_obj_value());
+        let state = proxy_state_ref(&obj).expect("状态盒");
+        assert!(!state.revoked);
+        let state = proxy_state_mut(&mut obj).expect("状态盒");
+        state.revoked = true;
+        assert!(proxy_state_ref(&obj).expect("状态盒").revoked);
+    }
+}

crates/oxide_vm/src/session_gc.rs

@@ -137,6 +137,7 @@ impl SessionGc {
         bytes += event::error_event_native_size(obj);
         bytes += event::custom_event_native_size(obj);
         bytes += crate::arguments_gc::arguments_native_size(obj);
+        bytes += crate::proxy::proxy_native_size(obj);
 
         bytes
     }
@@ -599,6 +600,7 @@ impl SessionGc {
             freed_bytes += event::drop_error_event_native(obj);
             freed_bytes += event::drop_custom_event_native(obj);
             freed_bytes += crate::arguments_gc::drop_arguments_native(obj);
+            freed_bytes += crate::proxy::drop_proxy_native(obj);
 
             freed_bytes
         }