gdb 调试 c++ 程序的 core dump 遇到"??"能用什么方法显示吗

Program terminated with signal 11, Segmentation fault.
#0  0x00007fe9cf7f0fad in malloc_consolidate () from /lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.212.el6_10.3.x86_64 libgcc-4.4.7-23.el6.x86_64 libstdc++-4.4.7-23.el6.x86_64
(gdb) bt
#0  0x00007fe9cf7f0fad in malloc_consolidate () from /lib64/libc.so.6
#1  0x00007fe9cf7f4125 in _int_free () from /lib64/libc.so.6
#2  0x00007fe9b018de03 in ?? ()
#3  0x000000000000082e in ?? ()
#4  0x00007fe9b0000020 in ?? ()
#5  0x0000000000000000 in ?? ()

比如上面那样，有什么指令可以显示更多调试信息吗？