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feat: Promise 基础子系统 + 微任务队列（resolve/reject/then/catch/finally + run() drain）

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彭俊皓
2026-08-09 21:08:53 +08:00
parent 464712f7ba
commit 538a5670dc
11 changed files with 1265 additions and 40 deletions
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crates/oxide_vm/src/generator.rs
+31 -28
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@@ -459,36 +459,36 @@ impl Vm {
} else {
// 注入模式：next(v) 写 reg 0；throw(e) 恢复异常上下文；return(v) 完成穿越。
match mode {
GeneratorResumeMode::Next(arg) => {
self.regs[0] = arg;
}
GeneratorResumeMode::Throw(exc) => {
self.exception_value = Some(exc);
self.pending_error_kind = Some(self.thrown_error_kind(exc));
if self.unwind().is_err() {
self.restore_inline_state(saved);
self.native_call_depth -= 1;
let thrown = self.last_uncaught_value.take().unwrap_or(exc);
unsafe { (*state_ptr).phase = GeneratorPhase::Completed };
return Ok(GeneratorStep::Thrown { value: thrown });
GeneratorResumeMode::Next(arg) => {
self.regs[0] = arg;
}
}
GeneratorResumeMode::Return(value) => {
// 等价于在挂起点执行 return：穿越 finally 或直接交付返回值。
// 直接交付路径走 do_return（帧弹出后需按内嵌 dispatch 语义返回）。
let prev_dispatch = self.generator_dispatch;
self.generator_dispatch = true;
let completed = self.complete_generator_return(value);
self.generator_dispatch = prev_dispatch;
if let Some(completed) = completed? {
self.restore_inline_state(saved);
self.native_call_depth -= 1;
let state = unsafe { &mut *state_ptr };
state.phase = GeneratorPhase::Completed;
state.result = completed;
return Ok(GeneratorStep::Completed { value: completed });
GeneratorResumeMode::Throw(exc) => {
self.exception_value = Some(exc);
self.pending_error_kind = Some(self.thrown_error_kind(exc));
if self.unwind().is_err() {
self.restore_inline_state(saved);
self.native_call_depth -= 1;
let thrown = self.last_uncaught_value.take().unwrap_or(exc);
unsafe { (*state_ptr).phase = GeneratorPhase::Completed };
return Ok(GeneratorStep::Thrown { value: thrown });
}
}
GeneratorResumeMode::Return(value) => {
// 等价于在挂起点执行 return：穿越 finally 或直接交付返回值。
// 直接交付路径走 do_return（帧弹出后需按内嵌 dispatch 语义返回）。
let prev_dispatch = self.generator_dispatch;
self.generator_dispatch = true;
let completed = self.complete_generator_return(value);
self.generator_dispatch = prev_dispatch;
if let Some(completed) = completed? {
self.restore_inline_state(saved);
self.native_call_depth -= 1;
let state = unsafe { &mut *state_ptr };
state.phase = GeneratorPhase::Completed;
state.result = completed;
return Ok(GeneratorStep::Completed { value: completed });
}
}
}
}
}
}
@@ -1039,6 +1039,9 @@ pub(crate) fn rewrite_generator_native(obj: &JsObject, mut rewrite: impl FnMut(J
/// 释放生成器状态盒（对象被 GC 回收时），返回释放字节数。
pub(crate) fn drop_generator_native(obj: &JsObject) -> u64 {
if !obj.is_generator_obj() {
return 0;
}
let ptr = obj.native_data() as *mut GeneratorState;
if ptr.is_null() {
return 0;