gdb学习16：使用jump进行跳转

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 我这里是跳转到11行，跳转过去会执行，执行报错，所以终止了（例1）。也可以跳转到函数（例2）。

例1：

(gdb) b 31
Breakpoint 1 at 0x870: file mystrcopy.c, line 31.
(gdb) r
Starting program: /home/gyz/mc/mystrcopy 
copying string!

Breakpoint 1, main (argv=1, argc=0x7fffffffe238) at mystrcopy.c:31
31		MyStringCopy(str3,str2);
(gdb) s
MyStringCopy (s1=0x0, s2=0x7fffffffe0e0 "copying string!") at mystrcopy.c:7
7		if(NULL == s1)
(gdb) jump 11
Continuing at 0x555555554765.

Program received signal SIGSEGV, Segmentation fault.
0x0000555555554786 in MyStringCopy (
    s1=0x1 <error: Cannot access memory at address 0x1>, 
    s2=0x7fffffffe0e0 "copying string!") at mystrcopy.c:14
14			while(0 != (*p++ = *s1++));
(gdb) 

例2：

(gdb) jump PrintNumbers:2
Line 19 is not in `main'.  Jump anyway? (y or n) y
Continuing at 0x5555555547a0.
[Inferior 1 (process 4376) exited normally]
(gdb) 

参考：https://blog.csdn.net/dadalan/article/details/3758025