如何在写入“定义”时在GDB中获取我的程序名称脚本？ [英] How to get my program name in GDB when writting a "define" script?

问题描述

我发现当定义一个GDB脚本时，获取程序名称非常烦人。我找不到任何相应的信息命令，并且由于多进程/线程和框架选择，我们也不能使用argv [0]。

所以，我该怎么做？

解决方案

如果您使用的是最近的gdb（7及以上版本） Python支持非常广泛（并且可能在您定义gdb脚本时想要去的地方）。我不是专家，但是我可以使用一个测试程序/ tmp / xyz：

 （gdb）python print gdb.current_progspace（）。filename 
 / tmp / xyz 
  

请参阅 http://sourceware.org/gdb/current/onlinedocs/gdb/Python.html 更多关于Python支持的信息。

在普通gdb中，您可以使用info proc和info target获取进程名称，但我想你想要它不只是印刷出来，还能够在脚本中进一步使用它？不知道如何将python运行时的值转化为gdb变量，而不是非常丑陋的使用日志文件并获取它并希望获得最佳效果。这是如何实现的：

  define set-program-name 
设置日志文件tmp.gdb 
设置日志覆盖
设置日志重定向
设置日志记录
 python printset $ programname = \％s\％gdb.current_progspace（）。filename 
设置注销
设置日志重定向关闭
设置日志覆盖关闭
源tmp.gdb 
结束
  

并在你自己的函数中执行：

$ p $ define your-own- func
set-program-name
printf程序名称是％s\\\
，$ programname
end


我会建议全力以赴支持python，并废除gdb脚本。我相信这是值得的。

I found it's very annoying to get the program name when defining a GDB script. I can't find any corresponding "info" command, and we can't use argv[0] either, because of multi-process/thread and frame-choosing.

So, what should I do?

解决方案

If you are using a recent gdb (7 and above) you can play around with the Python support which is quite extensive (and probably where you want to go when defining gdb-scripts in general). I'm no expert at it but for a test-program /tmp/xyz I could use:

(gdb) python print gdb.current_progspace().filename
/tmp/xyz

See http://sourceware.org/gdb/current/onlinedocs/gdb/Python.html for more info on the Python support.

In "normal" gdb you could get the process name with "info proc" and "info target", but I guess you wanted it not just printed but being able to use it further in scripts? Don't know how to get the value out of the python runtime into a gdb variable other than the extremely ugly "using log files and sourcing it and hope for the best". This is how this could be done:

define set-program-name
  set logging file tmp.gdb
  set logging overwrite on
  set logging redirect on
  set logging on
  python print "set $programname = \"%s\"" % gdb.current_progspace().filename
  set logging off
  set logging redirect off
  set logging overwrite off
  source tmp.gdb
end

and in your own function doing:

define your-own-func
  set-program-name
  printf "The program name is %s\n", $programname
end

I would suggest "going all in" on the python support, and scrap gdb-scripting. I believe it is worth the effort.

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