http://tromey.com/blog/?cat=17
http://blog.****.net/cnsword/article/details/16337031
http://blog.****.net/woohello/article/details/7326615
转换GDB调用栈到流程图
http://blog.****.net/HorkyChen/article/details/23307921
http://blog.****.net/horkychen/article/details/9372039
http://blog.****.net/horkychen/article/details/7800048