how to get python eventlet stack throuth gdb

Question

I have a python program. It has many eventlet coroutine. It seems that the program have dead lock someday. I have dumped its memory. I want to find reason. The question is how to get eventlet coroutine stack using gdb.

Additional Information:

1. I know how to get all thread stack through gdb. But it comes to eventlet coroutine，it became difficult. Because I have not enough info about python interpreter.
2. I also know how to get all eventlet coroutine stack in a python program by iterating all object. But it is useless to the situation we should check all object through gdb.

Answer 1

There is no simple way as with regular threads.

Here are some hints to help you, though:

• Multiple useful lessons on debugging Python with GDB http://grapsus.net/blog/post/Low-level-Python-debugging-with-GDB
• Use eventlet.backdoor to have emergency in-process interpreter for debugging http://eventlet.net/doc/modules/backdoor.html
• Search gc.get_objects() for instances of greenlet, print stack of x.gr_frame In gevent, how can I dump stack traces of all running greenlets?
• Setup signal handler (e.g. USR1) that iterates all greenthreads and prints their stack to stderr