feat: BroadcastChannel 内核接线两 P 字段加 BuiltinId 加脏家族位加注册表字段

crates/oxide_kernel/src/kernel/builtin_id.rs

@@ -1,4 +1,4 @@
-//! 内置对象 id 枚举（`BuiltinId` 87 变体 + `ALL` 顺序钉表）、世代快照
+//! 内置对象 id 枚举（`BuiltinId` 89 变体 + `ALL` 顺序钉表）、世代快照
 //! （`BuiltinSnapshot`）与按家族划分的脏标记位集（`BuiltinDirtySet`）；
 //! `NUM_BUILTINS` 文档承载"新增 BuiltinWorld 字段须同步"四处约束注记。
 
@@ -11,7 +11,7 @@ use crate::builtin::BuiltinWorld;
 /// 维护注意：每个新增的 `BuiltinWorld` 对象字段都必须加到这里以及
 /// `KernelSession::dirty_since_snapshot()`，以便选择性重置重建正确的
 /// builtin 家族。
-pub const NUM_BUILTINS: usize = 87;
+pub const NUM_BUILTINS: usize = 89;
 
 /// 内置对象枚举 id，与 `BuiltinWorld` 中的存储槽一一对应。
 ///
@@ -107,6 +107,8 @@ pub enum BuiltinId {
     AsyncIteratorProto = 84,
     MessagePortProto = 85,
     MessageChannelCtor = 86,
+    BroadcastChannelProto = 87,
+    BroadcastChannelCtor = 88,
 }
 
 impl BuiltinId {
@@ -201,6 +203,8 @@ impl BuiltinId {
         BuiltinId::AsyncIteratorProto,
         BuiltinId::MessagePortProto,
         BuiltinId::MessageChannelCtor,
+        BuiltinId::BroadcastChannelProto,
+        BuiltinId::BroadcastChannelCtor,
     ];
 }
 
@@ -277,6 +281,7 @@ pub struct BuiltinDirtySet {
     pub global: bool,
     pub console: bool,
     pub message_channel: bool,
+    pub broadcast_channel: bool,
 }
 
 impl BuiltinDirtySet {
@@ -311,6 +316,7 @@ impl BuiltinDirtySet {
             global: true,
             console: true,
             message_channel: true,
+            broadcast_channel: true,
         }
     }
 
@@ -339,6 +345,7 @@ impl BuiltinDirtySet {
             || self.stubs
             || self.console
             || self.message_channel
+            || self.broadcast_channel
     }
 
     /// 是否存在任何污染（builtin world 或 global object）。
@@ -351,13 +358,13 @@ impl BuiltinDirtySet {
 mod tests {
     use super::*;
 
-    /// 槽对齐面：ALL 表与判别值 0..86 严格同序，快照数组随 NUM_BUILTINS
+    /// 槽对齐面：ALL 表与判别值 0..88 严格同序，快照数组随 NUM_BUILTINS
     /// 自动扩维、逐槽对齐。
     #[test]
     fn builtin_snapshot_all_slots_aligned() {
-        assert_eq!(NUM_BUILTINS, 87);
+        assert_eq!(NUM_BUILTINS, 89);
         assert_eq!(BuiltinId::ALL.len(), NUM_BUILTINS);
-        for i in 0..86usize {
+        for i in 0..88usize {
             assert_eq!(BuiltinId::ALL[i] as usize, i);
         }
         assert_eq!(BuiltinId::ALL[81], BuiltinId::SharedArrayBufferProto);
@@ -366,6 +373,8 @@ mod tests {
         assert_eq!(BuiltinId::ALL[84], BuiltinId::AsyncIteratorProto);
         assert_eq!(BuiltinId::ALL[85], BuiltinId::MessagePortProto);
         assert_eq!(BuiltinId::ALL[86], BuiltinId::MessageChannelCtor);
+        assert_eq!(BuiltinId::ALL[87], BuiltinId::BroadcastChannelProto);
+        assert_eq!(BuiltinId::ALL[88], BuiltinId::BroadcastChannelCtor);
 
         // 快照经 session 全量构造路径采集，generations 数组维度 = 槽数。
         use crate::kernel::{KernelConfig, KernelCore, KernelSession};

crates/oxide_kernel/src/kernel/session.rs

@@ -198,6 +198,9 @@ impl KernelSession {
             console: gen(BuiltinId::Console) != snap(BuiltinId::Console),
             message_channel: gen(BuiltinId::MessagePortProto) != snap(BuiltinId::MessagePortProto)
                 || gen(BuiltinId::MessageChannelCtor) != snap(BuiltinId::MessageChannelCtor),
+            broadcast_channel: gen(BuiltinId::BroadcastChannelProto)
+                != snap(BuiltinId::BroadcastChannelProto)
+                || gen(BuiltinId::BroadcastChannelCtor) != snap(BuiltinId::BroadcastChannelCtor),
         };
         // wrapper 本体被写不落在任何家族位上（写的是 wrapper 自身而非所属 P
         // 对象）：收缩为全脏，强制重建全部家族与 global，使被写的可复用