feat: DisposableStack 内置对象（状态盒 + use/adopt/defer/dispose/move + GC 六处接线 + 绑定三时机）

2026-10-25 03:01:12 +08:00 · 2026-08-16 19:22:57 +08:00
parent fbfa3f5ccf
commit 7c02d3ece1
6 changed files with 594 additions and 4 deletions
@@ -0,0 +1,150 @@
+use std::sync::Arc;
+
+use oxide_kernel::kernel::{KernelCore, KernelSession};
+use oxide_kernel::shape_forge::EMPTY_SHAPE_ID;
+use oxide_types::object::{JsObject, PropAttributes};
+use oxide_types::value::JsValue;
+
+use crate::bindings::{
+    apply_binding_table, bind_accessor_getter, bind_global_value, bind_well_known_data_property,
+    bind_well_known_method_alias, configure_native_constructor,
+};
+
+/// 在 `DisposableStack.prototype` 上安装方法/别名/访问器/@@toStringTag。
+///
+/// 幂等：proto 上已有 `use` 方法（全新 proto 或已完整绑定）时整组跳过，
+/// 保留原型经 dirty reset 重复经过时安全。`@@dispose` 别名须在 `dispose`
+/// 绑定之后调用（读源槽 lookup_position，顺序敏感）。
+pub fn bind_disposable_stack_protos(core: &Arc<KernelCore>, session: &KernelSession) {
+    let world = session.builtin_world();
+    let proto_ptr = world.disposable_stack_proto.as_ptr() as *mut JsObject;
+    let proto = unsafe { &mut *proto_ptr };
+    let si_use = core.perm_interner().intern("use").0;
+    if core.shape_forge().lookup_position(proto.shape_id(), si_use).is_some() {
+        return;
+    }
+
+    apply_binding_table(
+        world,
+        proto,
+        core,
+        &[
+            ("use", oxide_builtins::disposable_stack::disposable_stack_use::<crate::vm::Vm> as *const (), 1),
+            ("adopt", oxide_builtins::disposable_stack::disposable_stack_adopt::<crate::vm::Vm> as *const (), 2),
+            ("defer", oxide_builtins::disposable_stack::disposable_stack_defer::<crate::vm::Vm> as *const (), 1),
+            ("dispose", oxide_builtins::disposable_stack::disposable_stack_dispose::<crate::vm::Vm> as *const (), 0),
+            ("move", oxide_builtins::disposable_stack::disposable_stack_move::<crate::vm::Vm> as *const (), 0),
+        ],
+    );
+    bind_accessor_getter(
+        core,
+        session,
+        proto,
+        "disposed",
+        oxide_builtins::disposable_stack::disposable_stack_disposed_getter::<crate::vm::Vm> as *const (),
+    );
+    // @@dispose 与 dispose 为同一函数对象（先绑 dispose 再取源槽）。
+    bind_well_known_method_alias(core, proto, "dispose", 12);
+    let sf = core.perm_interner().as_ref();
+    let tag = JsValue::perm_string(sf.string_ptr(sf.intern("DisposableStack").0));
+    bind_well_known_data_property(core, proto, 9, tag, PropAttributes::new(false, false, true));
+}
+
+/// 在 proto 上写 `constructor` 数据属性（非枚举，描述符 {t,f,t}）。
+fn write_proto_constructor(core: &Arc<KernelCore>, proto: &mut JsObject, ctor_val: JsValue) {
+    let sf = core.perm_interner().as_ref();
+    let sh = core.shape_forge().as_ref();
+    let si_constructor = sf.intern("constructor").0;
+    if sh.lookup_position(proto.shape_id(), si_constructor).is_some() {
+        return;
+    }
+    let new_shape = sh.make_shape(proto.shape_id(), si_constructor);
+    proto.set_shape_id(new_shape);
+    let pos = proto.push_prop(ctor_val);
+    proto.set_data_meta(pos, PropAttributes::new(true, false, true));
+    proto.bump_generation();
+}
+
+/// 把 `DisposableStack` 构造器绑定到 global（init 与 full_reset global 重建共用）。
+///
+/// proto.constructor 已有则复用（dirty reset 保留路径）；否则 Box 自建构造器
+/// （proto=Function.prototype，prototype 槽=DisposableStack.prototype，描述符按规范）。
+/// 幂等：protos 安装与 global 槽写入均自带重复跳过。
+pub fn bind_disposable_stack(core: &Arc<KernelCore>, session: &KernelSession, global: &mut JsObject) {
+    let world = session.builtin_world();
+    let proto_ptr = world.disposable_stack_proto.as_ptr() as *mut JsObject;
+    let proto = unsafe { &mut *proto_ptr };
+    let si_constructor = core.perm_interner().intern("constructor").0;
+    let ctor_val = match core.shape_forge().lookup_position(proto.shape_id(), si_constructor) {
+        Some(pos) => {
+            let existing = proto.get_prop_at(pos);
+            if existing.is_object() {
+                existing
+            } else {
+                JsValue::undefined()
+            }
+        }
+        None => JsValue::undefined(),
+    };
+    let ctor_val = if ctor_val.is_object() {
+        ctor_val
+    } else {
+        // Box 自建：[[Prototype]] 指向 Function.prototype，prototype/name 描述符按规范。
+        let function_proto = world.function_proto.as_ptr() as *mut JsObject;
+        let mut ctor = Box::new(JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::from_js_object(function_proto)));
+        ctor.set_function(true);
+        configure_native_constructor(
+            &mut ctor,
+            oxide_builtins::disposable_stack::disposable_stack_constructor::<crate::vm::Vm> as *const (),
+            0,
+        );
+        let sf = core.perm_interner().as_ref();
+        let sh = core.shape_forge().as_ref();
+        let si_prototype = sf.intern("prototype").0;
+        let si_name = sf.intern("name").0;
+        let si_length = sf.intern("length").0;
+        let ctor_shape1 = sh.make_shape(EMPTY_SHAPE_ID, si_prototype);
+        let ctor_shape2 = sh.make_shape(ctor_shape1, si_name);
+        let ctor_shape3 = sh.make_shape(ctor_shape2, si_length);
+        ctor.set_shape_id(ctor_shape3);
+        ctor.ensure_hash_props()
+            .push(JsValue::from_js_object(world.disposable_stack_proto.as_ptr() as *mut JsObject));
+        ctor.ensure_hash_props().push(JsValue::perm_string(sf.string_ptr(sf.intern("DisposableStack").0)));
+        ctor.ensure_hash_props().push(JsValue::int(0));
+        ctor.set_data_meta(0u32, PropAttributes::new(false, false, false));
+        ctor.set_data_meta(1u32, PropAttributes::new(false, false, true));
+        ctor.set_data_meta(2u32, PropAttributes::new(false, false, true));
+        JsValue::from_js_object(Box::into_raw(ctor))
+    };
+
+    write_proto_constructor(core, proto, ctor_val);
+    bind_disposable_stack_protos(core, session);
+    bind_global_value(core, global, "DisposableStack", ctor_val);
+}
+
+/// 对齐保留 global 上 `DisposableStack` 函数对象的 `prototype` 属性：object 家族
+/// 重建会产生新的 `DisposableStack.prototype`，保留的构造器须指向新原型，
+/// 否则 reset 后 `instanceof` 沿旧原型链恒 false。
+///
+/// global 同时重建（global dirty）或初始化时无 `DisposableStack` 属性，直接跳过
+/// ——彼时由 `bind_disposable_stack` 以新原型创建函数对象。
+pub fn sync_disposable_stack_ctor(core: &Arc<KernelCore>, session: &KernelSession, global: &mut JsObject) {
+    let si_stack = core.perm_interner().intern("DisposableStack").0;
+    let Some(pos) = core.shape_forge().lookup_position(global.shape_id(), si_stack) else {
+        return;
+    };
+    let stack_val = global.get_prop_at(pos);
+    if !stack_val.is_object() {
+        return;
+    }
+    let ctor = unsafe { &mut *stack_val.as_js_object_ptr() };
+    let si_prototype = core.perm_interner().intern("prototype").0;
+    let Some(proto_pos) = core.shape_forge().lookup_position(ctor.shape_id(), si_prototype) else {
+        return;
+    };
+    let new_proto = JsValue::from_js_object(session.builtin_world().disposable_stack_proto.as_ptr() as *mut JsObject);
+    ctor.set_prop_at(proto_pos, new_proto);
+
+    let proto_ptr = session.builtin_world().disposable_stack_proto.as_ptr() as *mut JsObject;
+    write_proto_constructor(core, unsafe { &mut *proto_ptr }, stack_val);
+}