如何使用Python创建GDB子流程并根据输出动态发送命令？ [英] How to use Python to create GDB subprocess and send commands dynamically based on output?

问题描述

下面是我需要做的一个通用示例：例如，我会通过从程序向GDB发送命令bt来启动回溯。然后，我将搜索pardrivr之类的单词，并使用正则表达式获取与其关联的行号。然后我会输入f [line_number_of_pardriver]到GDB中。这个过程将被重复，直到最终提取正确的信息为止。

我想通过创建GDB的子进程来使用Python来实现这一点。然后我想发送命令到GDB并从GDB读取输出。我会使用输出来根据输出的内容动态地发送更多的命令给GDB。

有人可以提供一个简单的例子来说明如何做到这一点吗？

非常感谢您！

解决方案

使用Pexpect： http://pexpect.readthedocs.org/en/latest/examples.html

更基本的选择是使用 subprocess.Popen（）。communicate（）：

http://pymotw.com/2/subprocess/#popen2

Here's a general example of what I need to do:

For example, I would initiate a back trace by sending the command "bt" to GDB from the program. Then I would search for a word such as "pardrivr" and get the line number associated with it by using regular expressions. Then I would input "f [line_number_of_pardriver]" into GDB. This process would be repeated until the correct information is eventually extracted.

I want to use Python to accomplish this by creating a subprocess of GDB. Then I want to send commands to GDB and read output from GDB. I would use the output to send more commands to GDB dynamically based on the content of the output.

Could someone please provide a simple example of how to do this?

Thank you so much!

解决方案

Use Pexpect: http://pexpect.readthedocs.org/en/latest/examples.html

A more basic option is using subprocess.Popen().communicate():

http://pymotw.com/2/subprocess/#popen2

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