lptrace本質上是基于GDB的，進入到進程內存空間，然后執行了一段python指令把當時的trace給print出來

使用工具：https://github.com/khamidou/lptrace

1、linux上很簡單：

安裝

yum install gdb

pip install lptrace

使用：

vagrant@precise32:/vagrant$ python -m SimpleHTTPServer 8080 &

[1] 1818

vagrant@precise32:/vagrant$ Serving HTTP on 0.0.0.0 port 8080 ...

vagrant@precise32:/vagrant$ sudo python lptrace -p 1818

...

fileno (/usr/lib/python2.7/SocketServer.py:438)

meth (/usr/lib/python2.7/socket.py:223)

fileno (/usr/lib/python2.7/SocketServer.py:438)

meth (/usr/lib/python2.7/socket.py:223)

_handle_request_noblock (/usr/lib/python2.7/SocketServer.py:271)

get_request (/usr/lib/python2.7/SocketServer.py:446)

accept (/usr/lib/python2.7/socket.py:201)

__init__ (/usr/lib/python2.7/socket.py:185)

verify_request (/usr/lib/python2.7/SocketServer.py:296)

process_request (/usr/lib/python2.7/SocketServer.py:304)

finish_request (/usr/lib/python2.7/SocketServer.py:321)

__init__ (/usr/lib/python2.7/SocketServer.py:632)

setup (/usr/lib/python2.7/SocketServer.py:681)

makefile (/usr/lib/python2.7/socket.py:212)

__init__ (/usr/lib/python2.7/socket.py:246)

makefile (/usr/lib/python2.7/socket.py:212)

__init__ (/usr/lib/python2.7/socket.py:246)

handle (/usr/lib/python2.7/BaseHTTPServer.py:336)

handle_one_request (/usr/lib/python2.7/BaseHTTPServer.py:301)

^CReceived Ctrl-C, quitting

vagrant@precise32:/vagrant$

You can see that the server is handling the request in real time! After pressing Ctrl-C, the trace is removed and the program execution resumes normally.

2、mac上有點復雜：關鍵我也沒有嘗試成功

設置方法參考：http://www.jianshu.com/p/ce2d77d7d1c4

https://sourceware.org/gdb/wiki/BuildingOnDarwin

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