Coredump-X：sprintf，不安全函数，导致字符串溢出破坏栈空间

典型现象

栈无法展开，全是问号

[Current thread is 1 (Thread 0xf73cd940 (LWP 7992))]
(gdb) bt
#0 0x2e736964 in ?? ()
#1 0x0070697a in ?? ()
#2 0xffe3d5c0 in ?? ()

很多寄存器变成了字符串。

(gdb) disass 0x02cf3e47
No function contains specified address.
(gdb) info reg
eax            0x0                 0
ecx            0xf55375c4          -179079740
edx            0x1                 1
ebx