在Linux上从核心转储中查找崩溃的汇编指令

发布时间：2020-12-14 00:31:52 所属栏目：Linux 来源：网络整理

导读：如果我将崩溃程序和核心转储加载到gdb中,它会向我显示堆栈跟踪和崩溃点,如下所示. Core was generated by `./cut --output-d=: -b1,1234567890- /dev/fd/63'.Program terminated with signal SIGSEGV,Segmentation fault.#0 is_printable_field (i=123456789

如果我将崩溃程序和核心转储加载到gdb中,它会向我显示堆栈跟踪和崩溃点,如下所示.

Core was generated by `./cut --output-d=: -b1,1234567890- /dev/fd/63'.
Program terminated with signal SIGSEGV,Segmentation fault.
#0  is_printable_field (i=1234567890) at src/cut.c:266
266   return (printable_field[n] >> (i % CHAR_BIT)) & 1;
(gdb) bt
#0  is_printable_field (i=1234567890) at src/cut.c:266
#1  set_fields (fieldstr=0x7ffccb0561c4 "") at src/cut.c:533
#2  main (argc=4,argv=0x7ffccb055cf8) at src/cut.c:865

有没有办法知道导致段错误的确切汇编指令？

解决方法

一种可能性是设置：

(gdb)layout asm

当GDB停止时,指向相应的装配线.

例：

│0x7ffff7aa441d <strtok+45>      je     0x7ffff7aa44d6 <strtok+230>                                                                                       │
   │0x7ffff7aa4423 <strtok+51>      mov    %rsi,%rax                                                                                                         │
  >│0x7ffff7aa4426 <strtok+54>      mov    (%rax),%cl                                                                                                        │
   │0x7ffff7aa4428 <strtok+56>      test   %cl,%cl                                                                                                           │
   │0x7ffff7aa442a <strtok+58>      je     0x7ffff7aa4454 <strtok+100>


Program received signal SIGSEGV,Segmentation fault.
0x00007ffff7aa4426 in strtok () from /lib64/libc.so.6
(gdb)

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!