gdb

gdb only sysbols generated by g++

Load

gdb http-client       executable file
gcc http-client.c -o http-client -g [gdb]

list function from the http-client.c

list main     symbol
list 22       show 10 lines aroud line 22
Backtrace     show call trace
break line or function
break filename:line or function

http://blog.youkuaiyun.com/hejianhua/article/details/6716193