mirror of
https://github.com/pjh456/OxideJS.git
synced 2026-10-23 18:21:13 +08:00
761 lines
30 KiB
Rust
761 lines
30 KiB
Rust
//! MessageChannel / MessagePort 行为面：`MessageChannel` 构造器（建双向 mpsc
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//! 通道与两枚端口对象）、`MessagePort` 原型方法（postMessage 同步交付 /
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//! close / start / readyState）与 `onmessage` / `onmessageerror` / `onerror`
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//! 原型访问器属性（经 dispatchEvent 交付 MessageEvent）。
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//!
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//! 端口载荷盒（mpsc 双端与对端端口边）存于对象 `native_fn` 槽，向 GC 家族表
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//! 暴露 edges/size/drop 三自由函数。
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use std::mem;
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use oxide_kernel::message_queue;
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use oxide_kernel::shape_forge::EMPTY_SHAPE_ID;
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use oxide_types::object::{JsObject, NativeFnPtr, PropAttributes};
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use oxide_types::value::JsValue;
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use oxide_runtime_api::{NativeResult, ProtoKind, VmHost};
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use crate::message_value::{detach_message, parse_transfer_list, rehydrate_message, MessageValue};
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/// MessagePort 载荷盒：存于对象 `native_fn` 槽（`Box::into_raw`，realm 局部
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/// 单线程）。`peer` 是发往对端的 mpsc 发送端（无 GC 边），`rx` 是收自对端的
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/// mpsc 接收端（无 GC 边），`peer_port` 是对端端口对象的裸指针（双向 GC 对象
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/// 边，保对端存活），`closed` 是关闭标志。
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///
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struct MessagePortInner {
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peer: message_queue::Sender<MessageValue>,
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rx: message_queue::Receiver<MessageValue>,
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peer_port: *mut JsObject,
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closed: bool,
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}
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/// 取载荷盒指针：仅 MessagePort 标签对象返回 `Some`，其余标签返回 `None`。
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fn message_port_payload_ptr(obj: &JsObject) -> Option<*mut MessagePortInner> {
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if !obj.is_message_port() {
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return None;
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}
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obj.native_fn().map(|ptr| ptr.as_ptr() as *mut MessagePortInner)
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}
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/// 收集 MessagePort 的对端端口边（GC 根边）。
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///
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/// `peer_port` 空窗口（构造期回填之前）返回空边集；边函数自守，语义自含。
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pub fn message_port_native_edges(obj: &JsObject) -> Vec<JsValue> {
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let Some(ptr) = message_port_payload_ptr(obj) else {
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return Vec::new();
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};
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if ptr.is_null() {
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return Vec::new();
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}
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// SAFETY: ptr 指向有效载荷盒（槽位仅构造期写入、释放时置空），
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// 只读单个裸指针字段，不搬移载荷。
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let peer_port = unsafe { (*ptr).peer_port };
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if peer_port.is_null() {
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return Vec::new();
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}
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vec![JsValue::from_js_object(peer_port)]
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}
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/// 只读核算 MessagePort 载荷盒字节（不释放）。
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///
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/// mpsc 内部缓冲在 Arc 通道内、盒不可寻址，不计入（有界轻微少计，
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/// 只推迟 GC 触发，不影响触发正确性）。
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pub fn message_port_native_size(obj: &JsObject) -> u64 {
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let Some(ptr) = message_port_payload_ptr(obj) else {
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return 0;
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};
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if ptr.is_null() {
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return 0;
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}
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mem::size_of::<MessagePortInner>() as u64
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}
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/// 释放 MessagePort 载荷盒（`Box<MessagePortInner>`），返回释放字节数。
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///
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/// 盒 drop 时发送端与接收端各减一次 mpsc 引用计数；`peer_port` 裸指针
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/// 无 drop。槽置空保证重复调用零释放（幂等）。
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pub fn drop_message_port_native(obj: &mut JsObject) -> u64 {
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let bytes = message_port_native_size(obj);
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if bytes == 0 {
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return 0;
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}
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let Some(ptr) = message_port_payload_ptr(obj) else {
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return 0;
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};
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// SAFETY: ptr 非空（message_port_native_size 已验证），Box::from_raw 恰好释放一次。
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unsafe { drop(Box::from_raw(ptr)) };
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obj.set_native_fn(None);
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bytes
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}
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/// MessageChannel 构造器：建两条 mpsc 通道与两枚端口对象，回填双向
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/// peer_port 边，返回 `{port1, port2}` 结果对象。
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///
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/// # 步骤
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/// 1. 非构造形态（`!constructing_native`）抛 TypeError（HTML 规范只有
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/// [[Construct]]，无 [[Call]]）
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/// 2. 建两条 mpsc 通道（A→B 与 B→A），载荷类型 `MessageValue`
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/// 3. 建两枚端口对象（proto = %MessagePort.prototype%，载荷盒入 native_fn 槽）
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/// 4. 回填双向 peer_port（裸指针写，跨 JS 调用不持借用）
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/// 5. 建 plain 结果对象（proto = %Object.prototype%），define 可枚举
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/// port1 / port2
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///
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/// onmessage / onmessageerror / onerror 不在对象上建自有属性（改
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/// MessagePort.prototype 访问器属性）。
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///
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/// # 副作用
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/// - 两端口对象经 `alloc_object` 入对象表即成 GC 根；
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/// - 双向 peer_port 边闭合环（两端口自然共亡拆环）。
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///
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/// # 注意事项
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/// - 端口固定挂 %MessagePort.prototype%，不读 new.target（与 HTML 规范一致）；
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/// - 构造器不占 BuiltinWorld P 字段（绑定层就地填充占位）。
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pub fn message_channel_constructor<H: VmHost>(vm: &mut H, _args: &[u8]) -> NativeResult {
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if !vm.constructing_native() {
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return NativeResult::Err(crate::error::create_type_error(vm, "MessageChannel constructor requires new"));
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}
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let (a_to_b_tx, b_rx) = message_queue::channel::<MessageValue>();
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let (b_to_a_tx, a_rx) = message_queue::channel::<MessageValue>();
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let proto_val = JsValue::from_js_object(vm.builtin_proto(ProtoKind::MessagePortProto));
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let (a_ptr, a_inner) = make_port_object(vm, proto_val, a_to_b_tx, a_rx);
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let (b_ptr, b_inner) = make_port_object(vm, proto_val, b_to_a_tx, b_rx);
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// 回填双向 peer_port：peer_port 空窗口的唯一来源，回填后双向 GC 边环闭合。
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// SAFETY: a_inner / b_inner 是刚建的载荷盒，本段存活，只写单个裸指针字段。
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unsafe {
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(*a_inner).peer_port = b_ptr;
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(*b_inner).peer_port = a_ptr;
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}
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// onmessage / onmessageerror / onerror 不在对象上建自有属性：改
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// MessagePort.prototype 访问器属性（getter 读注册表属性条目、setter 写），
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// 经既有 dispatchEvent 路径交付。
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// 结果对象：plain 对象（proto = %Object.prototype%），两枚可枚举 port1 / port2。
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let object_proto = JsValue::from_js_object(vm.builtin_proto(ProtoKind::ObjectProto));
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let result_ptr = vm.alloc_object(JsObject::new_empty(EMPTY_SHAPE_ID, object_proto));
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// SAFETY: result_ptr 是本函数刚 alloc_object 的对象，存活且本段无别名。
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let result_obj = unsafe { &mut *result_ptr };
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let si_port1 = vm.perm_intern("port1");
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let _ = vm.define_data_property(result_obj, si_port1, JsValue::from_js_object(a_ptr), PropAttributes::DEFAULT_DATA);
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let si_port2 = vm.perm_intern("port2");
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let _ = vm.define_data_property(result_obj, si_port2, JsValue::from_js_object(b_ptr), PropAttributes::DEFAULT_DATA);
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NativeResult::Ok(JsValue::from_js_object(result_ptr))
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}
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/// 建单枚端口对象：空形状对象挂载荷盒，`alloc_object` 入对象表。
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fn make_port_object<H: VmHost>(
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vm: &mut H, proto_val: JsValue, peer: message_queue::Sender<MessageValue>,
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rx: message_queue::Receiver<MessageValue>,
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) -> (*mut JsObject, *mut MessagePortInner) {
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let mut obj = JsObject::new_empty(EMPTY_SHAPE_ID, proto_val);
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obj.type_tag = JsObject::OBJ_TYPE_MESSAGE_PORT;
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let inner = Box::into_raw(Box::new(MessagePortInner {
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peer,
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rx,
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peer_port: std::ptr::null_mut(),
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closed: false,
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}));
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// SAFETY: 端口对象不可调用，native_fn 存不透明 `Box<MessagePortInner>` 指针，
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// 与 ArrayBuffer / RegExp 的类型化存储模式一致。
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obj.set_native_fn(Some(unsafe { NativeFnPtr::from_raw(inner as *const ()) }));
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let ptr = vm.alloc_object(obj);
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(ptr, inner)
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}
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/// MessagePort.postMessage(message, transfer)：detach 消息、入队对端 mpsc、
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/// 同步 `drain_port` 排空对端队列触发对端 onmessage。
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///
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/// # 步骤
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/// 1. this 须为 MessagePort，closed 则 TypeError
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/// 2. 解析 transfer 列表（undefined → 空集；违例报 DataCloneError）
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/// 3. `detach_message` 产 `MessageValue`（失败原值透传）
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/// 4. 入队对端 mpsc（SendError 理论不达，防御性报 TypeError）
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/// 5. `drain_port` 排空对端队列并触发对端 onmessage
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///
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/// # 边界与前提
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/// - 源对象由调用方寄存器保活；
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/// - 同步重入：handler 内再 postMessage 同通道则嵌套 drain（try_recv 非阻塞，无死锁）。
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pub fn message_port_post_message<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let this_val = vm.reg(args[0]);
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if !this_val.is_object() {
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return NativeResult::Err(crate::error::create_type_error(vm, "postMessage called on a non-object"));
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}
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let this_ptr = this_val.as_js_object_ptr();
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// SAFETY: is_object 保证非空指针；对象在 native 执行期间被根保持、不被回收。
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let this_obj = unsafe { &*this_ptr };
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let Some(inner_ptr) = message_port_payload_ptr(this_obj) else {
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return NativeResult::Err(crate::error::create_type_error(vm, "postMessage called on a non-MessagePort"));
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};
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// SAFETY: inner_ptr 经 message_port_payload_ptr 校验为存活载荷盒；标量读取
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// 短命，不跨 JS 调用。
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if unsafe { (*inner_ptr).closed } {
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return NativeResult::Err(crate::error::create_type_error(vm, "port is closed"));
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}
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let message = if args.len() > 1 { vm.reg(args[1]) } else { JsValue::undefined() };
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let transfer = if args.len() > 2 { vm.reg(args[2]) } else { JsValue::undefined() };
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let transfer_set = match parse_transfer_list(vm, transfer) {
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Ok(s) => s,
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Err(e) => return NativeResult::Err(e),
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};
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let mv = match detach_message(vm, message, &transfer_set) {
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Ok(m) => m,
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Err(e) => return NativeResult::Err(e),
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};
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// SAFETY: 同 inner_ptr 校验；peer_port 构造期回填完成，指针有效。
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let peer_port = unsafe { (*inner_ptr).peer_port };
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if peer_port.is_null() {
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return NativeResult::Err(crate::error::create_type_error(vm, "port has no peer"));
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}
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// SAFETY: 对端 rx 由对端载荷盒保活，对端存活则接收端存活，SendError 理论
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// 不达（防御性报 TypeError）。
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if unsafe { (*inner_ptr).peer.send(mv) }.is_err() {
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return NativeResult::Err(crate::error::create_type_error(vm, "peer port is gone"));
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}
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match drain_port(vm, peer_port) {
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Ok(()) => NativeResult::Ok(JsValue::undefined()),
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Err(e) => NativeResult::Err(e),
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}
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}
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/// 排空对端队列：逐条 rehydrate 建 MessageEvent 并经 `dispatchEvent` 交付
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/// 到对端端口（注册表查监听器，addEventListener 与属性 handler 同权）。
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///
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/// # 步骤
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/// 1. 读对端载荷盒（对端必存活——双向 GC 边），盒缺失防御性返回 Ok
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/// 2. try_recv 循环：Empty / Disconnected 退出；`rehydrate_message` 得 data；
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/// 建真实 MessageEvent（data + type "message"，ports 空数组）
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/// 3. 经 `dispatchEvent` 交付（this = 对端端口，实参 = 事件）；监听器异常
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/// 原值透传（返回 Err 结束 drain）；无监听器时 no-op
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///
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/// # 边界与前提
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/// - rehydrate 新对象与事件盒经 `alloc_object` 入对象表即成根，交付后无引用自然回收；
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/// - 同步重入：handler 内再 postMessage 同通道则嵌套 drain（try_recv 非阻塞，无死锁）；
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/// - messageerror 交付路径为前向钩子（rehydrate 当前不可失败，触发点不可达）。
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fn drain_port<H: VmHost>(vm: &mut H, peer_port: *mut JsObject) -> Result<(), JsValue> {
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// SAFETY: peer_port 是有效端口对象（双向 GC 边保活）。
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let peer_obj = unsafe { &*peer_port };
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let Some(inner_ptr) = message_port_payload_ptr(peer_obj) else {
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return Ok(());
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};
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let peer_val = JsValue::from_js_object(peer_port);
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// SAFETY: inner_ptr 是有效载荷盒，rx 的 try_recv 非阻塞、不跨 JS 调用。
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while let Ok(mv) = unsafe { (*inner_ptr).rx.try_recv() } {
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let data = rehydrate_message(vm, &mv);
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// 建真实 MessageEvent（data + type "message"，ports 空数组）。
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let event_ptr = crate::event::create_message_event_box(vm, data, "message");
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let event_val = JsValue::from_js_object(event_ptr);
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// 经 dispatchEvent 交付（注册表查监听器，addEventListener 与属性 handler 同权）。
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vm.set_reg(0, peer_val);
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vm.set_reg(1, event_val);
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match crate::event_target::event_target_dispatch_event(vm, &[0, 1]) {
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NativeResult::Ok(_) => {}
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NativeResult::Err(e) => return Err(e),
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NativeResult::TailCall { .. } => {}
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}
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}
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Ok(())
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}
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/// MessagePort.close()：置 closed 标志（幂等，重复关闭 no-op）。
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///
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/// # 边界
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/// - this 须为 MessagePort；
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/// - 不拆 peer_port 环（两端口自然共亡拆环）；对端 close 事件延后。
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pub fn message_port_close<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let this_val = vm.reg(args[0]);
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if !this_val.is_object() {
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return NativeResult::Err(crate::error::create_type_error(vm, "close called on a non-object"));
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}
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let this_ptr = this_val.as_js_object_ptr();
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// SAFETY: is_object 保证非空指针；对象在 native 执行期间被根保持、不被回收。
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let this_obj = unsafe { &*this_ptr };
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let Some(inner_ptr) = message_port_payload_ptr(this_obj) else {
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return NativeResult::Err(crate::error::create_type_error(vm, "close called on a non-MessagePort"));
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};
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// SAFETY: inner_ptr 是有效载荷盒，标志写短命、不跨 JS 调用。
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unsafe { (*inner_ptr).closed = true };
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NativeResult::Ok(JsValue::undefined())
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}
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/// MessagePort.start()：no-op（端口自动激活，无需显式启动）。
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pub fn message_port_start<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let this_val = vm.reg(args[0]);
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if !this_val.is_object() {
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return NativeResult::Err(crate::error::create_type_error(vm, "start called on a non-object"));
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}
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let this_ptr = this_val.as_js_object_ptr();
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// SAFETY: is_object 保证非空指针；对象在 native 执行期间被根保持、不被回收。
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let this_obj = unsafe { &*this_ptr };
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if message_port_payload_ptr(this_obj).is_none() {
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return NativeResult::Err(crate::error::create_type_error(vm, "start called on a non-MessagePort"));
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}
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NativeResult::Ok(JsValue::undefined())
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}
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/// MessagePort.readyState：读 closed 标志返 "open" / "closed"。
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pub fn message_port_ready_state<H: VmHost>(vm: &mut H, args: &[u8]) -> NativeResult {
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let this_val = vm.reg(args[0]);
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if !this_val.is_object() {
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return NativeResult::Err(crate::error::create_type_error(vm, "readyState called on a non-object"));
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}
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let this_ptr = this_val.as_js_object_ptr();
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// SAFETY: is_object 保证非空指针；对象在 native 执行期间被根保持、不被回收。
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let this_obj = unsafe { &*this_ptr };
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let Some(inner_ptr) = message_port_payload_ptr(this_obj) else {
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return NativeResult::Err(crate::error::create_type_error(vm, "readyState called on a non-MessagePort"));
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};
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// SAFETY: inner_ptr 是有效载荷盒，标志读短命、不跨 JS 调用。
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let closed = unsafe { (*inner_ptr).closed };
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NativeResult::Ok(vm.new_string(if closed { "closed" } else { "open" }))
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use oxide_kernel::shape_forge::EMPTY_SHAPE_ID;
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use oxide_types::object::NativeFnPtr;
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/// 构造真实通道并把双端移入载荷盒。
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fn port_payload() -> MessagePortInner {
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let (peer, rx) = message_queue::channel::<MessageValue>();
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MessagePortInner {
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peer,
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rx,
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peer_port: std::ptr::null_mut(),
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closed: false,
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}
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}
|
||
|
||
/// 手工构造带载荷盒的 MessagePort 对象（不经 Vm，只验 GC 三自由函数）。
|
||
fn port_object_with_payload(inner: MessagePortInner) -> JsObject {
|
||
let mut obj = JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::undefined());
|
||
obj.type_tag = JsObject::OBJ_TYPE_MESSAGE_PORT;
|
||
let payload_ptr = Box::into_raw(Box::new(inner));
|
||
// SAFETY: 载荷盒形态与 native_fn 槽存储约定一致，测试结束前恰好释放一次。
|
||
obj.set_native_fn(Some(unsafe { NativeFnPtr::from_raw(payload_ptr as *const ()) }));
|
||
obj
|
||
}
|
||
|
||
#[test]
|
||
fn size_and_drop_idempotent() {
|
||
let mut obj = port_object_with_payload(port_payload());
|
||
let struct_bytes = mem::size_of::<MessagePortInner>() as u64;
|
||
assert_eq!(message_port_native_size(&obj), struct_bytes);
|
||
// 首次 drop 释放结构体；槽置空后二次 drop 零释放。
|
||
assert_eq!(drop_message_port_native(&mut obj), struct_bytes);
|
||
assert_eq!(drop_message_port_native(&mut obj), 0);
|
||
}
|
||
|
||
#[test]
|
||
fn edges_peer_port_null_and_present() {
|
||
let mut obj = port_object_with_payload(port_payload());
|
||
// peer_port 空窗口（构造期回填之前）：边函数返回零条边。
|
||
assert!(message_port_native_edges(&obj).is_empty());
|
||
|
||
// 回填对端端口边：一条对象边。
|
||
let peer = Box::leak(Box::new(JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::undefined())));
|
||
peer.type_tag = JsObject::OBJ_TYPE_MESSAGE_PORT;
|
||
let ptr = message_port_payload_ptr(&obj).unwrap();
|
||
// SAFETY: peer 是测试局部对象，测试期间存活，边只读不搬移。
|
||
unsafe { (*ptr).peer_port = peer as *mut JsObject };
|
||
let edges = message_port_native_edges(&obj);
|
||
assert_eq!(edges.len(), 1);
|
||
assert!(edges[0].is_object());
|
||
// 对端对象是测试局部泄漏，不随端口 drop 释放（裸指针无 drop）。
|
||
drop_message_port_native(&mut obj);
|
||
}
|
||
|
||
#[test]
|
||
fn channel_roundtrip_through_box() {
|
||
let mut obj = port_object_with_payload(port_payload());
|
||
let ptr = message_port_payload_ptr(&obj).unwrap();
|
||
// SAFETY: 载荷盒测试期间存活。
|
||
unsafe {
|
||
assert!(!(*ptr).closed);
|
||
(*ptr).peer.send(MessageValue::Number(1.0)).unwrap();
|
||
assert!(matches!((*ptr).rx.try_recv().unwrap(), MessageValue::Number(n) if n == 1.0));
|
||
}
|
||
drop_message_port_native(&mut obj);
|
||
}
|
||
|
||
#[test]
|
||
fn payload_ptr_brand_guard() {
|
||
// 非 MessagePort 类型标签（PLAIN）对象取载荷指针恒 None。
|
||
let mut obj = JsObject::new_empty(EMPTY_SHAPE_ID, JsValue::undefined());
|
||
let payload_ptr = Box::into_raw(Box::new(port_payload()));
|
||
// SAFETY: 同 port_object_with_payload 的载荷盒形态。
|
||
obj.set_native_fn(Some(unsafe { NativeFnPtr::from_raw(payload_ptr as *const ()) }));
|
||
assert!(message_port_payload_ptr(&obj).is_none());
|
||
// SAFETY: 测试构造的盒，恰好释放一次。
|
||
unsafe { drop(Box::from_raw(payload_ptr)) };
|
||
}
|
||
|
||
// ---- 端到端行为面（经 Vm 跑脚本，验证构造器与方法绑定）----
|
||
|
||
use oxide_vm::vm::Vm;
|
||
|
||
/// 编译并执行单脚本，返回 VM 与完成值。
|
||
fn eval(source: &str) -> Result<(Vm, JsValue), String> {
|
||
let allocator = oxide_parser::Allocator::default();
|
||
let program = oxide_parser::parse(&allocator, source).map_err(|e| format!("parse: {:?}", e))?;
|
||
let module = oxide_compiler::compiler::Compiler::new()
|
||
.compile(&program)
|
||
.map_err(|e| format!("compile: {e}"))?;
|
||
let mut vm = Vm::new();
|
||
let result = vm.run(&std::sync::Arc::new(module))?;
|
||
Ok((vm, result))
|
||
}
|
||
|
||
/// 跑一段返回布尔的断言脚本，断言为真。
|
||
fn assert_script(source: &str) {
|
||
let (_vm, result) = eval(source).unwrap();
|
||
assert!(result.as_bool(), "script failed: {source}");
|
||
}
|
||
|
||
#[test]
|
||
fn constructor_shape_and_identity() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
return (
|
||
typeof ch.port1 === 'object' &&
|
||
typeof ch.port2 === 'object' &&
|
||
ch.port1 !== ch.port2 &&
|
||
MessageChannel.length === 0 &&
|
||
MessageChannel.name === 'MessageChannel' &&
|
||
Object.getPrototypeOf(ch.port1).constructor === MessageChannel
|
||
);
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn port_type_tag_is_message_port() {
|
||
let (_vm, result) = eval("new MessageChannel().port1").unwrap();
|
||
assert!(result.is_object());
|
||
// SAFETY: result 是脚本返回的端口对象，测试期间存活。
|
||
let obj = unsafe { &*result.as_js_object_ptr() };
|
||
assert_eq!(obj.type_tag, JsObject::OBJ_TYPE_MESSAGE_PORT);
|
||
}
|
||
|
||
#[test]
|
||
fn port_onmessage_is_prototype_accessor() {
|
||
// onmessage 是原型访问器属性（非自有属性）：getOwnPropertyDescriptor
|
||
// 返 undefined，原型描述符带 get / set 函数。
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var p = ch.port1;
|
||
var ownDesc = Object.getOwnPropertyDescriptor(p, 'onmessage');
|
||
var protoDesc = Object.getOwnPropertyDescriptor(Object.getPrototypeOf(p), 'onmessage');
|
||
return (
|
||
ownDesc === undefined &&
|
||
p.onmessage === null &&
|
||
protoDesc !== undefined &&
|
||
typeof protoDesc.get === 'function' &&
|
||
typeof protoDesc.set === 'function' &&
|
||
protoDesc.enumerable === false &&
|
||
protoDesc.configurable === true
|
||
);
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn basic_delivery_object() {
|
||
// handler 收到 MessageEvent，消息值经 e.data 访问。
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var received = null;
|
||
ch.port2.onmessage = function(e) { received = e.data; };
|
||
ch.port1.postMessage({a: 1});
|
||
return received !== null && received.a === 1;
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn roundtrip_all_cloneable_types() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var got = null;
|
||
ch.port2.onmessage = function(e) { got = e.data; };
|
||
ch.port1.postMessage({
|
||
num: 42,
|
||
neg: -1.5,
|
||
big: 10n,
|
||
str: 'hello',
|
||
bool: true,
|
||
nil: null,
|
||
undef: undefined,
|
||
arr: [1, 2, 3],
|
||
obj: {x: 1, y: 'z'},
|
||
map: new Map([['k', 1]]),
|
||
set: new Set([1, 2]),
|
||
date: new Date(1700000000000),
|
||
re: /ab+c/g,
|
||
err: new Error('boom')
|
||
});
|
||
if (got.num !== 42 || got.neg !== -1.5 || got.big !== 10n) return false;
|
||
if (got.str !== 'hello' || got.bool !== true || got.nil !== null) return false;
|
||
if (!('undef' in got) || got.undef !== undefined) return false;
|
||
if (got.arr.length !== 3 || got.arr[1] !== 2) return false;
|
||
if (got.obj.x !== 1 || got.obj.y !== 'z') return false;
|
||
if (got.map.get('k') !== 1) return false;
|
||
if (got.set.size !== 2 || !got.set.has(2)) return false;
|
||
if (got.date.getTime() !== 1700000000000) return false;
|
||
if (got.re.source !== 'ab+c' || got.re.flags !== 'g') return false;
|
||
if (got.err.name !== 'Error' || got.err.message !== 'boom') return false;
|
||
return true;
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn transfer_detaches_source() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var ab = new ArrayBuffer(8);
|
||
var received = null;
|
||
ch.port2.onmessage = function(e) { received = e.data; };
|
||
ch.port1.postMessage(ab, [ab]);
|
||
return ab.byteLength === 0 && received.byteLength === 8;
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn clone_path_keeps_source_alive() {
|
||
// 未列入 transfer 的 ArrayBuffer 走克隆路径：源不 detach。
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var ab = new ArrayBuffer(4);
|
||
var received = null;
|
||
ch.port2.onmessage = function(e) { received = e.data; };
|
||
ch.port1.postMessage(ab);
|
||
return ab.byteLength === 4 && received.byteLength === 4 && received !== ab;
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn data_clone_error_on_function() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
try {
|
||
ch.port1.postMessage(function(){});
|
||
return false;
|
||
} catch (e) {
|
||
return e.name === 'DataCloneError';
|
||
}
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn data_clone_error_on_circular() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var a = {};
|
||
a.self = a;
|
||
try {
|
||
ch.port1.postMessage(a);
|
||
return false;
|
||
} catch (e) {
|
||
return e.name === 'DataCloneError';
|
||
}
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn data_clone_error_on_shared_array_buffer() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
try {
|
||
ch.port1.postMessage(new SharedArrayBuffer(8));
|
||
return false;
|
||
} catch (e) {
|
||
return e.name === 'DataCloneError';
|
||
}
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn transfer_violation_is_data_clone_error() {
|
||
// 非 AB 元素与重复元素均报 DataCloneError（与 structuredClone 口径统一）。
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var ab = new ArrayBuffer(4);
|
||
try {
|
||
ch.port1.postMessage(1, [ab, 'not-a-buffer']);
|
||
return false;
|
||
} catch (e) {
|
||
if (e.name !== 'DataCloneError') return false;
|
||
}
|
||
try {
|
||
ch.port1.postMessage(1, [ab, ab]);
|
||
return false;
|
||
} catch (e) {
|
||
return e.name === 'DataCloneError';
|
||
}
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn close_semantics() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var p = ch.port1;
|
||
if (p.readyState !== 'open') return false;
|
||
p.close();
|
||
if (p.readyState !== 'closed') return false;
|
||
// 重复关闭幂等 no-op。
|
||
p.close();
|
||
try {
|
||
p.postMessage(1);
|
||
return false;
|
||
} catch (e) {
|
||
return e.name === 'TypeError';
|
||
}
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn start_is_noop() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
ch.port1.start();
|
||
ch.port2.start();
|
||
return ch.port1.readyState === 'open' && ch.port2.readyState === 'open';
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn no_handler_silently_drops() {
|
||
// 未设 handler 时 postMessage 不抛错、不派发。
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
ch.port1.postMessage({a: 1});
|
||
ch.port1.postMessage('x');
|
||
return ch.port1.readyState === 'open';
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn non_construct_form_type_error() {
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
try {
|
||
MessageChannel();
|
||
return false;
|
||
} catch (e) {
|
||
return e.name === 'TypeError';
|
||
}
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
|
||
#[test]
|
||
fn non_port_receiver_type_error() {
|
||
// 对非对象 this 直调 native 入口抛 TypeError。
|
||
let (mut vm, _result) = eval("new MessageChannel()").unwrap();
|
||
vm.set_reg(0, JsValue::int(1));
|
||
vm.set_reg(1, JsValue::int(42));
|
||
let args = [0u8, 1];
|
||
match message_port_post_message(&mut vm, &args) {
|
||
NativeResult::Err(e) => {
|
||
assert!(e.is_object());
|
||
}
|
||
_ => panic!("expected TypeError"),
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn non_port_object_type_error() {
|
||
// 对象但非 MessagePort（plain 对象）调 postMessage 抛 TypeError。
|
||
let (mut vm, plain) = eval("({})").unwrap();
|
||
vm.set_reg(0, plain);
|
||
vm.set_reg(1, JsValue::int(42));
|
||
let args = [0u8, 1];
|
||
match message_port_post_message(&mut vm, &args) {
|
||
NativeResult::Err(e) => {
|
||
assert!(e.is_object());
|
||
}
|
||
_ => panic!("expected TypeError"),
|
||
}
|
||
}
|
||
|
||
#[test]
|
||
fn gc_edge_keeps_peer_alive() {
|
||
// 仅持 port1 时 port2 不被回收：双向 GC 边保活对端，
|
||
// 强制收集后对端 handler 仍可触发。
|
||
assert_script(
|
||
r#"
|
||
(function() {
|
||
var ch = new MessageChannel();
|
||
var p1 = ch.port1;
|
||
var received = null;
|
||
(function() {
|
||
var p2 = ch.port2;
|
||
p2.onmessage = function(e) { received = e.data; };
|
||
})();
|
||
$262.gc();
|
||
p1.postMessage({x: 42});
|
||
return received !== null && received.x === 42;
|
||
})()
|
||
"#,
|
||
);
|
||
}
|
||
}
|