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feat: 生成器基础支持（YIELD 帧快照挂起/恢复 + GeneratorPrototype next/return/throw）

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- 新增 YIELD/SUSPEND_BODY opcode；function* 识别与 yield emit
- GeneratorState 全量快照 VM 执行上下文（regs/pc/bytecode/spill/save/try/cell 栈段/迭代器）
- 调用时参数初始化（默认值/解构副作用与异常在 g() 时刻生效）
- %GeneratorPrototype%/%GeneratorFunction.prototype% 内建对象与 next/return/throw
- session GC trace 生成器状态 JsValues；闭包捕获分析补 yield/赋值目标扫描
This commit is contained in:
爱特每羊队
2026-08-09 18:02:08 +08:00
parent 7c2e9ec1ff
commit 6f80c12ac9
26 changed files with 1265 additions and 107 deletions
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crates/oxide_vm/src/vm_runtime.rs
+64 -49
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@@ -26,6 +26,64 @@ fn place_flat(module: &CompiledModule, out: &mut Vec<Option<CompiledModule>>) {
}
impl Vm {
/// 保存当前完整 VM 执行状态到堆上（内联同步调用与生成器恢复共用）。
pub(crate) fn save_inline_state(&mut self) -> Box<InlineSyncState> {
vm_trace!("save_inline_state: pc={} depth={}", self.pc, self.frames.len());
Box::new(InlineSyncState {
regs: Box::new(self.regs),
pc: self.pc,
bytecode: std::mem::take(&mut self.bytecode),
active_immutables: self.active_immutables,
active_reg_limit: self.active_reg_limit,
root_reg_limit: self.root_reg_limit,
try_stack: std::mem::take(&mut self.try_stack),
frames: std::mem::take(&mut self.frames),
exception_value: self.exception_value.take(),
pending_exception: self.pending_exception.take(),
pending_error_kind: self.pending_error_kind.take(),
pending_completion: self.pending_completion,
for_in_iters: std::mem::take(&mut self.iters.for_in_iters),
for_of_iters: std::mem::take(&mut self.iters.for_of_iters),
last_for_of_result: self.iters.last_for_of_result,
saved_bytecode_stack: std::mem::take(&mut self.saved_bytecode_stack),
saved_immutables_stack: std::mem::take(&mut self.saved_immutables_stack),
save_stack: std::mem::take(&mut self.save_stack),
spill_stack: std::mem::take(&mut self.spill_stack),
cell_stack: std::mem::take(&mut self.cell_stack),
inline_callee: self.inline_callee,
inline_args_base: self.inline_args_base,
inline_args_count: self.inline_args_count,
})
}
/// 把 [`save_inline_state`] 保存的状态完整恢复回 VM。
pub(crate) fn restore_inline_state(&mut self, saved: Box<InlineSyncState>) {
vm_trace!("restore_inline_state: pc={}", saved.pc);
self.regs = *saved.regs;
self.pc = saved.pc;
self.bytecode = saved.bytecode;
self.active_immutables = saved.active_immutables;
self.active_reg_limit = saved.active_reg_limit;
self.root_reg_limit = saved.root_reg_limit;
self.try_stack = saved.try_stack;
self.frames = saved.frames;
self.exception_value = saved.exception_value;
self.pending_exception = saved.pending_exception;
self.pending_error_kind = saved.pending_error_kind;
self.pending_completion = saved.pending_completion;
self.iters.for_in_iters = saved.for_in_iters;
self.iters.for_of_iters = saved.for_of_iters;
self.iters.last_for_of_result = saved.last_for_of_result;
self.saved_bytecode_stack = saved.saved_bytecode_stack;
self.saved_immutables_stack = saved.saved_immutables_stack;
self.save_stack = saved.save_stack;
self.spill_stack = saved.spill_stack;
self.cell_stack = saved.cell_stack;
self.inline_callee = saved.inline_callee;
self.inline_args_base = saved.inline_args_base;
self.inline_args_count = saved.inline_args_count;
}
pub(crate) fn call_bytecode_function_inline(
&mut self, callee: JsValue, callee_obj: &JsObject, receiver: JsValue, args: &[JsValue],
) -> Result<JsValue, String> {
@@ -54,37 +112,17 @@ impl Vm {
self.raise_error_kind("RangeError", "Maximum call stack size exceeded")?;
return Ok(JsValue::undefined());
}
// 生成器函数调用返回迭代器对象，不执行函数体。
if self.sub_modules[sub_idx].is_generator {
return self.create_generator_object(callee, receiver, args);
}
self.native_call_depth += 1;
let subs = Arc::clone(&self.sub_modules);
let sub = &subs[sub_idx];
vm_trace!("call_bytecode: saving state pc={} depth={}", self.pc, self.frames.len());
let saved = Box::new(InlineSyncState {
regs: Box::new(self.regs),
pc: self.pc,
bytecode: std::mem::take(&mut self.bytecode),
active_immutables: self.active_immutables,
active_reg_limit: self.active_reg_limit,
root_reg_limit: self.root_reg_limit,
try_stack: std::mem::take(&mut self.try_stack),
frames: std::mem::take(&mut self.frames),
exception_value: self.exception_value.take(),
pending_exception: self.pending_exception.take(),
pending_error_kind: self.pending_error_kind.take(),
pending_completion: self.pending_completion,
for_in_iters: std::mem::take(&mut self.iters.for_in_iters),
for_of_iters: std::mem::take(&mut self.iters.for_of_iters),
last_for_of_result: self.iters.last_for_of_result,
saved_bytecode_stack: std::mem::take(&mut self.saved_bytecode_stack),
saved_immutables_stack: std::mem::take(&mut self.saved_immutables_stack),
save_stack: std::mem::take(&mut self.save_stack),
spill_stack: std::mem::take(&mut self.spill_stack),
cell_stack: std::mem::take(&mut self.cell_stack),
inline_callee: self.inline_callee,
inline_args_base: self.inline_args_base,
inline_args_count: self.inline_args_count,
});
let saved = self.save_inline_state();
self.regs = [JsValue::undefined(); 256];
self.pc = 0;
@@ -123,30 +161,7 @@ impl Vm {
self.native_call_depth -= 1;
vm_trace!("call_bytecode: restoring state pc={} result={:?}", saved.pc, result.as_ref().ok());
self.regs = *saved.regs;
self.pc = saved.pc;
self.bytecode = saved.bytecode;
self.active_immutables = saved.active_immutables;
self.active_reg_limit = saved.active_reg_limit;
self.root_reg_limit = saved.root_reg_limit;
self.try_stack = saved.try_stack;
self.frames = saved.frames;
self.exception_value = saved.exception_value;
self.pending_exception = saved.pending_exception;
self.pending_error_kind = saved.pending_error_kind;
self.pending_completion = saved.pending_completion;
self.iters.for_in_iters = saved.for_in_iters;
self.iters.for_of_iters = saved.for_of_iters;
self.iters.last_for_of_result = saved.last_for_of_result;
self.saved_bytecode_stack = saved.saved_bytecode_stack;
self.saved_immutables_stack = saved.saved_immutables_stack;
self.save_stack = saved.save_stack;
self.spill_stack = saved.spill_stack;
self.cell_stack = saved.cell_stack;
self.inline_callee = saved.inline_callee;
self.inline_args_base = saved.inline_args_base;
self.inline_args_count = saved.inline_args_count;
self.restore_inline_state(saved);
result
}