feat(vm): arguments 对象绑定（CREATE_ARGUMENTS + 帧实参 spill 区）

2026-08-08 00:01:22 +08:00
parent 820de00d79
commit a206d0ef82
12 changed files with 267 additions and 7 deletions
@@ -113,6 +113,14 @@ impl Vm {
            let saved_this = self.regs[254];
            let saved_new_target = self.regs[255];

+            // 完整实参写入 spill 栈实参区（在帧的 spill 区之前），供 CREATE_ARGUMENTS 使用。
+            let args_base = self.spill_stack.len() as u32;
+            for i in 0..arg_count {
+                let src_reg = first_arg_reg.wrapping_add(i as u8) as usize;
+                self.spill_stack.push(self.regs[src_reg]);
+            }
+            let args_count = arg_count.min(u16::MAX as usize) as u16;
+
            for i in 0..sub_n_args {
                let src_reg = first_arg_reg.wrapping_add(i as u8) as usize;
                self.regs[sub_param_base + i] = self.regs[src_reg];
@@ -137,6 +145,8 @@ impl Vm {
                caller_reg_limit,
                saved_reg_offset,
                spill_offset: self.spill_stack.len() as u32,
+                arguments_base: args_base,
+                arguments_count: args_count,
                saved_this,
                saved_new_target,
                callee: constructor,