如何更改 gdb 使用的 Python 解释器?

2022-01-20 00:00:00 python python-2.7 gdb

问题描述

我使用的是 ubuntu 14.04，其中 python3 是默认系统包.

I'm using ubuntu 14.04, where python3 is a default system package.

我想用gdb调试Python2.7程序，但是我好像遇到了这个问题:

I want to debug Python2.7 programs with gdb, but I seem to encounter this issue:

当我在 gdb 中时，使用 py 命令会将我置于解释器中，因此我在解释器中运行了这些命令:

When i'm in gdb, using the py command puts me in an interpreter, so i ran these commands in the interpreter:

首先我检查解释器版本:

First I check the interpreter version:

(gdb) py
>import sys
>print(sys.version)
>end
3.4.0 (default, Apr 11 2014, 13:08:40) 
[GCC 4.8.2]

然后我检查正在使用的解释器可执行文件

Then I check what interpreter executable is being used

(gdb) py
>import sys
>print(sys.executable)
>end
/usr/bin/python
(gdb)

然后在 bash 中，我检查解释器:

Then in bash, I check the interpreter:

12:34]hostname ~ $ls -l /usr/bin/python 
lrwxrwxrwx 1 root root 9 Dec 21  2013 /usr/bin/python -> python2.7

虽然 gdb 说它使用的是我的 2.7 解释器，但实际上它使用的是另一个解释器.我需要一个 2.7 解释器才能将它与 ubuntu 包python2.7-dbg"提供的 python 特定扩展一起使用，因为据我所知，python 3.4 还没有这样的包，即使有，我要调试的程序运行 python 2.7

So although gdb says it's using my 2.7 interpreter, it's actually using another one. I need a 2.7 interpreter to be able to use it with the python specific extensions that the ubuntu package 'python2.7-dbg' provides, because as far as i know there's no such package for python 3.4 yet, and even if there was, the programs that i want to debug run python 2.7

我的问题是如何让它使用我想要的解释器?

My question is how do i make it use the interpreter I want?

不要卸载 python3 顺便说一句.我在 ubuntu 14.04 上完成了它，它破坏了我的系统.没能重新站起来.我目前正在使用它而没有窗口管理器(它很酷，1337)，但你明白了.

Do not uninstall python3 btw. I did it on ubuntu 14.04 and it wrecked my system. Couldn't manage to get it up again. I'm currently using it with no window-manager (it's cool and 1337), but you get the idea.

解决方案

虽然 gdb 说它使用的是我的 2.7 解释器

So although gdb says it's using my 2.7 interpreter

GDB 没有这么说.它说它使用的是 3.4.0，并且解释器以 libpython3.4.a 或 libpython3.4.so.

GDB doesn't say that. It says it's using 3.4.0, and that interpreter is linked into GDB, in the form of libpython3.4.a or libpython3.4.so.

由于不涉及实际的 Python 二进制文件，这里的(小)错误是 sys.executable 返回 /usr/bin/python.返回 /usr/bin/gdb 可能会更好.

Since there is no actual Python binary involved, the (minor) bug here is that sys.executable returns /usr/bin/python. It would possibly be better for it to return /usr/bin/gdb instead.

我需要一个 2.7 的解释器

I need a 2.7 interpreter

在这种情况下，您必须在使用适当的 --with-python 值配置之后，从源代码重建 gdb.

In that case, you'll have to rebuild gdb from source, after configuring it with appropriate --with-python value.

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