gdb调试点滴，使用gdb调试工具

1.complileGCC:gcc -Wall -o2 -g  file.cppMAKEFILE:CFLAGS = -Wall -o2 -gconfigure:./configure CFLAGS='-Wall -o2 -g'

2.gdb filename [core file]             file core.29724              core.29724: ELF 64-bit LSB core file x86-64, version 1 (SYSV), SVR4-style, from './a.out'

3.commandset breakpoint : break -> bb function-nameb line-numberb file-name:line-numberb file-name:function-nameb +/- offsetb *address

注释：+/- offset :从当前位置的偏移行数*address 代码段内的地址example：info breakNum     Type           Disp Enb Address            What2       breakpoint     keep y   0x4112 in main(int, char**) at /home/lt/src/test/src/test.cpp:27

run -a(gdb)run -a

backtrace -> btbtbt N/-Nbt fullbt full N/-Nbt number

.info register -> info regrax            0x7ffff102cf40   1216rbx            0x4940d0 4800720rcx            0xb      11rdx            0x7fffffffe248   7720rsi            0x1      1rdi            0x7fffffffe10f   7407rbp            0x7fffffffe0c0   0x7fffffffe0c0rsp            0x7fffffffd040   0x7fffffffd040r8             0x0      0r9             0x5241564e20524148       59271792r10            0x4c422       5494989895845890115r11            0x7ffff0d3e740   7168r12            0x40f840 4257856r13            0x7fffffffe240   7712r14            0x0      0r15            0x0      0rip            0x453c98 0x453c98 eflags         0x202    [ IF ]cs             0x33     51ss             0x2b     43ds             0x0      0es             0x0      0fs             0x0      0gs             0x0      0

显示register内容，使用$号：p $raxp/格式x 16进制d 10u  无符号十进制o 8t  2进制，twoa 地址c asciif 浮点s 字串i  机器语言