gdb脚本,脚本之家


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:

 

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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