feat: SharedArrayBuffer 原型对象与构造器 meta 正式绑定

crates/oxide_vm/src/bindings/bind_shared_array_buffer.rs

@@ -0,0 +1,57 @@
+use std::sync::Arc;
+
+use crate::bind_constructor;
+use crate::bindings::{bind_accessor_getter, configure_native_constructor};
+use oxide_kernel::kernel::{KernelCore, KernelSession};
+use oxide_types::object::JsObject;
+
+/// 把 SharedArrayBuffer 构造器与原型访问器绑定到 global。
+pub fn bind_shared_array_buffer(core: &Arc<KernelCore>, session: &KernelSession, global: &mut JsObject) {
+    let ctor_ptr = session.builtin_world().shared_array_buffer_constructor.as_ptr() as *mut JsObject;
+    let ctor = unsafe { &mut *ctor_ptr };
+    let proto_ptr = session.builtin_world().shared_array_buffer_proto.as_ptr() as *mut JsObject;
+    let proto = unsafe { &mut *proto_ptr };
+
+    configure_native_constructor(
+        ctor,
+        oxide_builtins::array_buffer::shared_array_buffer_constructor::<crate::vm::Vm> as *const (),
+        1,
+    );
+
+    // SAB 原型当前无静态方法（grow/growable 臂与 slice 归后续面）；
+    // byteLength/maxByteLength 两枚访问器（set 恒 undefined）读载荷字节数。
+    bind_accessor_getter(
+        core,
+        session,
+        proto,
+        "byteLength",
+        oxide_builtins::array_buffer::shared_array_buffer_byte_length::<crate::vm::Vm> as *const (),
+    );
+
+    bind_accessor_getter(
+        core,
+        session,
+        proto,
+        "maxByteLength",
+        oxide_builtins::array_buffer::shared_array_buffer_max_byte_length::<crate::vm::Vm> as *const (),
+    );
+
+    // growable 定长臂：恒 false，品牌校验抛 TypeError（proto 自身访问即抛）。
+    bind_accessor_getter(
+        core,
+        session,
+        proto,
+        "growable",
+        oxide_builtins::array_buffer::shared_array_buffer_growable::<crate::vm::Vm> as *const (),
+    );
+
+    bind_constructor!(
+        core,
+        global,
+        "SharedArrayBuffer",
+        ctor_ptr,
+        oxide_builtins::array_buffer::shared_array_buffer_constructor::<crate::vm::Vm>,
+        1,
+        hash: true
+    );
+}

crates/oxide_vm/src/bindings/bind_stubs.rs

@@ -8,7 +8,7 @@ use oxide_types::value::JsValue;
 
 use crate::bindings::{bind_global_value, configure_native_constructor};
 
-const STUBS: [(&str, *const (), u8); 7] = [
+const STUBS: [(&str, *const (), u8); 6] = [
     ("Proxy", oxide_builtins::stubs::proxy_stub::<crate::vm::Vm> as *const (), 2),
     ("WeakMap", oxide_builtins::stubs::weakmap_stub::<crate::vm::Vm> as *const (), 0),
     ("WeakSet", oxide_builtins::stubs::weakset_stub::<crate::vm::Vm> as *const (), 0),
@@ -18,15 +18,10 @@ const STUBS: [(&str, *const (), u8); 7] = [
         oxide_builtins::stubs::finalization_registry_stub::<crate::vm::Vm> as *const (),
         1,
     ),
-    (
-        "SharedArrayBuffer",
-        oxide_builtins::array_buffer::shared_array_buffer_constructor::<crate::vm::Vm> as *const (),
-        1,
-    ),
     ("Atomics", oxide_builtins::stubs::atomics_stub::<crate::vm::Vm> as *const (), 0),
 ];
 
-/// 把未实现内置（Proxy/WeakMap/WeakSet/WeakRef/FinalizationRegistry/SharedArrayBuffer/Atomics）
+/// 把未实现内置（Proxy/WeakMap/WeakSet/WeakRef/FinalizationRegistry/Atomics）
 /// 的 stub 构造器绑定到 global，并登记到 `stub_objects` 供快照跟踪。
 pub fn bind_stubs(core: &Arc<KernelCore>, session: &mut KernelSession, global: &mut JsObject) {
     let builtin_world = Arc::get_mut(&mut session.builtin_world)

crates/oxide_vm/src/bindings/mod.rs

@@ -44,6 +44,8 @@ pub mod bind_reflect;
 pub mod bind_regexp;
 /// Set 构造器与原型的 native 方法绑定。
 pub mod bind_set;
+/// SharedArrayBuffer 构造器与原型的 native 方法绑定。
+pub mod bind_shared_array_buffer;
 /// String 构造器与原型的 native 方法绑定。
 pub mod bind_string;
 /// 未实现内置（Proxy/BigInt/WeakMap 等）的 stub 构造器绑定。
@@ -632,9 +634,10 @@ fn install_to_string_tags(core: &Arc<KernelCore>, session: &KernelSession) {
     let sh = core.shape_forge().as_ref();
     let tag_id = oxide_types::private_key::WELL_KNOWN_SYMBOL_TO_STRING_TAG;
     let tag_key = oxide_types::private_key::make_well_known_symbol_key(tag_id);
-    let cases: [(*mut JsObject, &str); 12] = [
+    let cases: [(*mut JsObject, &str); 13] = [
         (world.map_proto.as_ptr() as *mut JsObject, "Map"),
         (world.array_buffer_proto.as_ptr() as *mut JsObject, "ArrayBuffer"),
+        (world.shared_array_buffer_proto.as_ptr() as *mut JsObject, "SharedArrayBuffer"),
         (world.set_proto.as_ptr() as *mut JsObject, "Set"),
         (world.data_view_proto.as_ptr() as *mut JsObject, "DataView"),
         (world.array_iterator_proto.as_ptr() as *mut JsObject, "Array Iterator"),
@@ -884,11 +887,6 @@ fn bind_stub_globals(core: &Arc<KernelCore>, session: &KernelSession, global: &m
             oxide_builtins::stubs::finalization_registry_stub::<crate::vm::Vm> as *const (),
             1,
         ),
-        (
-            "SharedArrayBuffer",
-            oxide_builtins::array_buffer::shared_array_buffer_constructor::<crate::vm::Vm> as *const (),
-            1,
-        ),
         ("Atomics", oxide_builtins::stubs::atomics_stub::<crate::vm::Vm> as *const (), 0),
     ]
     .into_iter()
@@ -923,6 +921,11 @@ pub fn bind_global_builtin_slots(core: &Arc<KernelCore>, session: &KernelSession
         oxide_builtins::array_buffer::array_buffer_constructor::<crate::vm::Vm> as *const (),
         1,
     );
+    configure_existing_ctor(
+        &world.shared_array_buffer_constructor,
+        oxide_builtins::array_buffer::shared_array_buffer_constructor::<crate::vm::Vm> as *const (),
+        1,
+    );
     configure_existing_ctor(
         &world.data_view_constructor,
         oxide_builtins::data_view::data_view_constructor::<crate::vm::Vm> as *const (),
@@ -976,6 +979,10 @@ pub fn bind_global_builtin_slots(core: &Arc<KernelCore>, session: &KernelSession
             "ArrayBuffer",
             JsValue::from_js_object(world.array_buffer_constructor.as_ptr() as *mut JsObject),
         ),
+        (
+            "SharedArrayBuffer",
+            JsValue::from_js_object(world.shared_array_buffer_constructor.as_ptr() as *mut JsObject),
+        ),
         ("DataView", JsValue::from_js_object(world.data_view_constructor.as_ptr() as *mut JsObject)),
         ("Error", JsValue::from_js_object(world.error_constructor.as_ptr() as *mut JsObject)),
         ("String", JsValue::from_js_object(world.string_constructor.as_ptr() as *mut JsObject)),
@@ -1160,6 +1167,9 @@ pub fn rebind_dirty_builtins(core: &Arc<KernelCore>, session: &mut KernelSession
     if dirty.map_or(true, |d| d.array_buffer) {
         bind_array_buffer::bind_array_buffer(core, session, global);
     }
+    if dirty.map_or(true, |d| d.shared_array_buffer) {
+        bind_shared_array_buffer::bind_shared_array_buffer(core, session, global);
+    }
     if dirty.map_or(true, |d| d.data_view) {
         bind_data_view::bind_data_view(core, session, global);
     }