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：





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[code]/usr/share/gdb/auto-load/usr/lib/

目录下

gdb -x script方式

gdb命令source

script方式[/code]