使用GDB根据段错误core dump文件定位问题

使用GDB根据段错误core dump文件定位问题

#include 
int main(void)
{
     
    char *s = "hello world";
    *s = 'H';
}

$ gcc segfault.c -g -o segfault
$ ./segfault
Segmentation fault

来自：https://en.wikipedia.org/wiki/Segmentation_fault

如何定位

$ gdb-multiarch ./segfault core
GNU gdb (Ubuntu 8.1-0ubuntu3.2) 8.1.0.20180409-git
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and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
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For help, type "help".
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Reading symbols from ./segfault...done.
[New LWP 26596]
Core was generated by `./segfault'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x0000564dbceae76e in main () at segfault.c:19
19	    *s = 'H';
(gdb) 

这样就定位到具体出错的行了。