fix: 清理 CallFrame 无效字段并接入函数名元数据

crates/oxide_compiler/src/emitter.rs

@@ -377,8 +377,9 @@ impl Compiler {
                 };
 
                 // Compile body into sub-module
-                let sub_module =
+                let mut sub_module =
                     self.compile_function_body(&param_names, body_stmts, ctx, false)?;
+                sub_module.function_name = Some(name.clone());
                 ctx.sub_modules.push(sub_module);
                 // 1-indexed: 0 = no sub_module (sentinel)
                 let sub_idx = ctx.sub_modules.len() as u32;
@@ -1223,8 +1224,11 @@ impl Compiler {
                     &[]
                 };
 
-                let sub_module =
+                let mut sub_module =
                     self.compile_function_body(&param_names, body_stmts, ctx, false)?;
+                if let Some(id) = &fe.id {
+                    sub_module.function_name = Some(id.name.to_string());
+                }
                 ctx.sub_modules.push(sub_module);
                 // 1-indexed: 0 = no sub_module (sentinel)
                 let sub_idx = ctx.sub_modules.len() as u32;

crates/oxide_vm/src/builtins/error.rs

@@ -163,3 +163,35 @@ pub fn error_stack_getter(vm: &mut Vm, _args: &[u8]) -> NativeResult {
     let si = vm.kernel().string_forge().intern(&result).0;
     Ok(JsValue::string(si, 0))
 }
+
+#[cfg(test)]
+mod tests {
+    use super::error_stack_getter;
+    use crate::vm::{CallFrame, Vm};
+    use oxide_types::value::JsValue;
+
+    #[test]
+    fn error_stack_uses_call_frame_function_name() {
+        let mut vm = Vm::new();
+        let name_si = vm.kernel().string_forge().intern("foo").0;
+        vm.frames.push(CallFrame {
+            return_addr: 0,
+            function_name: name_si,
+            caller_reg_limit: 1,
+            saved_regs: vec![JsValue::undefined()].into_boxed_slice(),
+            saved_this: JsValue::undefined(),
+            saved_new_target: JsValue::undefined(),
+        });
+
+        let stack = error_stack_getter(&mut vm, &[0]).unwrap();
+        let stack_str = vm
+            .kernel()
+            .string_forge()
+            .lookup(stack.as_string_index())
+            .unwrap_or_default();
+        assert!(
+            stack_str.contains("foo"),
+            "expected function name in stack: {stack_str}"
+        );
+    }
+}

crates/oxide_vm/src/vm.rs

@@ -135,10 +135,6 @@ macro_rules! member_read_prop {
 
 pub struct CallFrame {
     pub return_addr: usize,
-    pub n_locals: u8,
-    pub n_args: u8,
-    pub function_obj_reg: u8,
-    pub frame_base: u8,
     pub function_name: u32,
     pub caller_reg_limit: u8,
     pub saved_regs: Box<[JsValue]>,
@@ -779,11 +775,11 @@ impl Vm {
                                     // Push call frame
                                     self.frames.push(CallFrame {
                                         return_addr: self.pc,
-                                        n_locals: sub_n_args as u8,
-                                        n_args: sub_n_args as u8,
-                                        function_obj_reg: callee_reg as u8,
-                                        frame_base: sub_param_base as u8,
-                                        function_name: 0,
+                                        function_name: self.sub_modules[sub_idx]
+                                            .function_name
+                                            .as_deref()
+                                            .map(|name| self.kernel.string_forge().intern(name).0)
+                                            .unwrap_or(0),
                                         caller_reg_limit,
                                         saved_regs,
                                         saved_this,