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fix: TA 构造形态改读构造入口标记替代寄存器推断

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彭俊皓
2026-09-22 19:41:55 +00:00
parent b5b456346c
commit dce132acec
10 changed files with 94 additions and 12 deletions
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crates/oxide_vm/src/vm_dispatch_misc.rs
+10 -2
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@@ -88,10 +88,14 @@ impl Vm {
// 该入口统一保存/恢复调用窗口与 253/254 槽且不触碰 255，调用方
// new.target 与 this 跨 native 构造不被污染；receiver 经 arg0 打包，
// native 侧经 reg(args[0]) 读取，构造语义不变。newTarget 快照后置入
// reg(255) 暴露给 native 构造器（调用后恢复原值）。
// reg(255) 暴露给 native 构造器（调用后恢复原值）；构造形态标记同窗
// 夹持（调用后恢复）。
let saved_new_target = self.regs[255];
let saved_constructing = self.constructing_native;
self.regs[255] = constructor;
self.constructing_native = true;
let result = self.call_function_sync(constructor, new_obj_val, &args);
self.constructing_native = saved_constructing;
self.regs[255] = saved_new_target;
match result {
Ok(v) => {
@@ -230,10 +234,14 @@ impl Vm {
if target_obj.native_fn().is_some() {
// native 构造器：receiver = 新对象，值传递调用（错误原值恢复后展开）。
// new.target 按 bound [[Construct]] 语义取最外层 bound 包装（wrapper_val），
// 快照后置入 reg(255) 暴露给 native 构造器（调用后恢复原值）。
// 快照后置入 reg(255) 暴露给 native 构造器（调用后恢复原值）；构造
// 形态标记同窗夹持（调用后恢复）。
let saved_new_target = self.regs[255];
let saved_constructing = self.constructing_native;
self.regs[255] = wrapper_val;
self.constructing_native = true;
let result = self.call_function_sync(target_val, new_obj_val, &call_args);
self.constructing_native = saved_constructing;
self.regs[255] = saved_new_target;
match result {
Ok(v) => {