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  • gdb脚本

    一、简介

    作为UNIX/Linux下使用广泛的调试器,gdb不仅提供了丰富的命令,还引入了对脚本的支持:一种是对已存在的脚本语言支持,比如python,用户可以直接书写python脚本,由gdb调用python解释器执行;另一种是命令脚本(command file),用户可以在脚本中书写gdb已经提供的或者自定义的gdb命令,再由gdb执行。

    二、命令脚本

    自定义命令格式如下

    define commandName  
        statement  
        ......  
    end

    自定义命令帮助文档格式如下

    document commandName
         statement
         .......
    end

    提示:在gdb中执行脚本要使用source命令,例如:“source xxx.gdb”。

    三、python脚本

    脚本示例:

    1 #!/usr/bin/env python
      2 from __future__ import with_statement                                                                                    
      3 import gdb
      4 
      5 class SaveBreakpointsCommand (gdb.Command):
      6     """Save the current breakpoints to a file.
      7 This command takes a single argument, a file name.
      8 The breakpoints can be restored using the 'source' command."""
      9 
     10     def __init__ (self):
     11         super (SaveBreakpointsCommand, self).__init__ ("save breakpoints",
     12                                                        gdb.COMMAND_SUPPORT,
     13                                                        gdb.COMPLETE_FILENAME)
     14 
     15     def invoke (self, arg, from_tty):
     16         with open (arg, 'w') as f:
     17             for bp in gdb.get_breakpoints ():
     18                 print >> f, "break", bp.get_location (),
     19                 if bp.get_thread () is not None:
     20                     print >> f, " thread", bp.get_thread (),
     21                 if bp.get_condition () is not None:
     22                     print >> f, " if", bp.get_condition (),
     23                 print >> f
     24                 if not bp.is_enabled ():
     25                     print >> f, "disable $bpnum"
     26                 # Note: we don't save the ignore count; there doesn't
     27                 # seem to be much point.
     28                 commands = bp.get_commands ()
     29                 if commands is not None:
     30                     print >> f, "commands"
     31                     # Note that COMMANDS has a trailing newline.
     32                     print >> f, commands,
     33                     print >> f, "end"
     34
     35 SaveBreakpointsCommand ()

    运行:

    image

    四、脚本加载方式

    gdb加载脚本的方式有

    autoload方式            #需要把 脚本放置到/usr/share/gdb/auto-load/usr/lib/目录下
    
    gdb -x script方式
    
    gdb命令source 
    
    script方式
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  • 原文地址:https://www.cnblogs.com/274914765qq/p/4547563.html
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