diff --git a/App/lib/core/Gen/FuncGenBase.vp b/App/lib/core/Gen/FuncGenBase.vp
index 0f1cbdb..12943b3 100644
--- a/App/lib/core/Gen/FuncGenBase.vp
+++ b/App/lib/core/Gen/FuncGenBase.vp
@@ -134,8 +134,8 @@ class FuncGenBase(CallGenBase.CallGenBase):
 
                 # 映射到 LLVM 属性名并追加
                 ar: int = self._append_llvm_attr(attrs_buf, attr_name)
-                stdio.printf("[ATTR]   arg[%d] name='%s' append=%d buf='%s'\n",
-                             ai, attr_name, ar, attrs_buf)
+                stdio.printf("[ATTR]   arg[%d] name='%s' append=%d buf='%s' blen=%zu b0=0x%02x\n",
+                             ai, attr_name, ar, attrs_buf, string.strlen(attrs_buf), attrs_buf[0])
                 if ar != 0:
                     found_any = 1
                     # 追加成功后，如果不是最后一个属性，添加空格分隔
@@ -221,6 +221,7 @@ class FuncGenBase(CallGenBase.CallGenBase):
             return
         cur_len: t.CSizeT = string.strlen(buf)
         s_len: t.CSizeT = string.strlen(s)
+        stdio.printf("[ATTR]   _append_str: max_len=%zu cur=%zu slen=%zu s='%s'\n", max_len, cur_len, s_len, s)
         if cur_len + s_len + 1 > max_len:
             return  # 无剩余容量：丢弃本次追加，避免越界写
         string.strcpy(buf + cur_len, s)