Home Database Mysql Tutorial 使用 Addr2line 将函数地址解析为函数名

使用 Addr2line 将函数地址解析为函数名

Jun 07, 2016 pm 03:00 PM
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用 Addr2line 将函数地址解析为函数名 http://www.ibm.com/developerworks/cn/linux/l-graphvis/ Addr2line 工具(它是标准的 GNU Binutils 中的一部分)是一个可以将指令的地址和可执行映像转换成文件名、函数名和源代码行数的工具。这种功能对于将跟踪地址

用 Addr2line 将函数地址解析为函数名

http://www.ibm.com/developerworks/cn/linux/l-graphvis/ 

Addr2line 工具(它是标准的 GNU Binutils 中的一部分)是一个可以将指令的地址和可执行映像转换成文件名、函数名和源代码行数的工具。这种功能对于将跟踪地址转换成更有意义的内容来说简直是太棒了。

要了解这个过程是怎样工作的,我们可以试验一个简单的交互式的例子。(我直接从 shell 中进行操作,因为这是最简单地展示这个过程的方法,如清单 4 所示。)这个示例 C 文件(test.c)是通过 cat 一个简单的应用程序实现的(也就是说,将标准输出的文本重定向到一个文件中)。然后使用 gcc 来编译这个文件,它会传递一些特殊的选项。首先,要(使用 -Wl 选项)通知链接器生成一个映像文件,并(使用 -g 选项)通知编译器生成调试符号。最终生成可执行文件 test。得到新的可执行应用程序之后,您就可以使用grep 工具在映像文件中查找 main 来寻找它的地址了。使用这个地址和 Addr2line 工具,就可以判断出函数名(main)、源文件(/home/mtj/test/test.c)以及它在源文件中的行号(4)。

在调用 Addr2line 工具时,要使用 -e 选项来指定可执行映像是 test。通过使用 -f 选项,可以告诉工具输出函数名。

$ cat >> test.c
#include <stdio.h>
int main()
{
  printf("Hello World\n");
  return 0;
}
<ctld-d>
$ gcc -Wl,-Map=test.map -g -o test test.c
$ grep main test.map
	0x08048258		__libc_start_main@@GLIBC_2.0
	0x08048258		main
$ addr2line 0x08048258 -e test -f
main
/home/mtj/test/test.c:4
$</ctld-d></stdio.h>
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