For each line in the line buffer for a CU, we need to check for the lowaddress match to find the first line number.
要获得 CU 的行缓冲的每一行，我们需要检查低位地址匹配以找到函数的第一行的行号。
2
For each line in the line buffer for a CU, check for the lowaddress match to find the first line number for the function.
要获得CU的行缓冲的每一行，则需要检查低位地址匹配以找到函数的第一行的行号。
3
From the attributes of the subprogram, get the lowaddress and high address corresponding to this subprogram. This represents the addresses corresponding to the start and end of that subprogram.