文章来源：http://blog.csdn.net/xzz_hust/article/details/8894836
在看CSAPP的chapter 8 Exceptional Control Flow时发现用GDB调试程序时程序无法接收到ctrl-c发送的终止信号, 上网查了一下, 原来是因为GDB默认会截获信号, 使调试程序无法接收到信号, 要使调试程序能够接收到信号有两种办法:
（1）改变gdb信号处理的设置 比如,以下设置会告诉gdb在接收到SIGINT时不要停止、打印出来、传递给调试目标程序 ===================================== (gdb) handle SIGINT nostop print pass SIGINT is used by the debugger. Are you sure you want to change it? (y or n) y Signal Stop Print Pass to program Description SIGINT No Yes Yes Interrupt (gdb) ===================================== （2）使用gdb命令直接向调试的应用程序发送信号 首先在你希望发送信号的语句处设置断点，然后运行程序，当停止到断点所在位置后，用gdb的signal命令发送信号给调试目标程序 ==================================== (gdb) signal SIGINT Continuing with signal SIGINT. Breakpoint 1, handler (signal=2) at main.cpp:15 15 printf("Signal handler...\n"); ====================================
参考文章:
http://bbs.csdn.net/topics/50456838
http://stackoverflow.com/questions/553956/debugging-a-segmentation-fault-when-i-do-ctrl-c
