feat: 增加 CreateClosure 字节码,函数字面量每次执行创建新闭包

crates/oxide_vm/src/vm.rs

@@ -739,6 +739,20 @@ impl Vm {
                     self.dispatch_load_const(rd, instr)?;
                 }
 
+                OpCode::CREATE_CLOSURE => {
+                    let sub_idx = opcode::imm16(instr) as u32;
+                    debug_assert!(sub_idx > 0 && (sub_idx as usize) <= self.sub_modules.len());
+                    let sub = &self.sub_modules[sub_idx as usize - 1];
+                    let result = self.create_function_object(
+                        sub_idx,
+                        sub.is_arrow,
+                        sub.is_class_constructor,
+                        sub.is_derived_constructor,
+                        sub.needs_home_object,
+                    );
+                    self.regs[rd] = result;
+                }
+
                 OpCode::ADD => {
                     self.dispatch_add(rd, a, b)?;
                 }

crates/oxide_vm/src/vm_runtime.rs

@@ -158,8 +158,7 @@ impl Vm {
             }
         }
 
-        let global_ptr = self.session.global_object().as_ptr() as *mut JsObject;
-        self.regs[254] = JsValue::from_js_object(global_ptr);
+        self.regs[254] = JsValue::undefined();
 
         self.dispatch()
     }

crates/oxide_vm/src/vm_support.rs

@@ -235,7 +235,7 @@ impl Vm {
     /// Create a function JsObject for a BytecodeFunc constant.
     /// When `is_arrow` is true, captures the current `this` (regs[254])
     /// for lexical this binding at call time.
-    fn create_function_object(
+    pub(crate) fn create_function_object(
         &mut self, sub_idx: u32, is_arrow: bool, is_class_constructor: bool, is_derived_constructor: bool,
         needs_home_object: bool,
     ) -> JsValue {