常用LLDB指令

• print , p
  打印内存地址

(lldb) p a
(int) $0 = 10
(lldb) p obj
(NSObject *) $1 = 0x0000000100573f70
(lldb) print obj
(NSObject *) $2 = 0x0000000100573f70

• po
  打印对象

(lldb) po a
10
(lldb) po obj
<NSObject: 0x100573f70>

• memory read 或者 x
  读取内存

<NSObject: 0x100573f70>
(lldb) memory read 0x100573f70
0x100573f70: 41 d1 a9 8d ff ff 1d 00 00 00 00 00 00 00 00 00  A...............
0x100573f80: 50 40 57 00 01 00 00 00 90 42 57 00 01 00 00 00  P@W......BW.....

(lldb) x 0x100573f70

memory read后边可以增加数量、格式、字节数三个参数，
格式：x是16进制，f是浮点，d是10进制
字节大小：b：byte 1字节，h：half word 2字节，w：word 4字节，g：giant word 8字节

(lldb) memory read/4xg 0x100573f70
0x100573f70: 0x001dffff8da9d141 0x0000000000000000
0x100573f80: 0x0000000100574050 0x0000000100574290

(lldb) x/4xg 0x100573f70

• memory write
  修改内存中的值

(lldb) memory write 0x100573f79 9
(lldb) x 0x100573f70
0x100573f70: 41 d1 a9 8d ff ff 1d 00 00 09 00 00 00 00 00 00  A...............
0x100573f80: 50 40 57 00 01 00 00 00 90 42 57 00 01 00 00 00  P@W......BW.....

• register read
  读取寄存器

register read x0     //读取x0寄存器的值，这里不再需要附加$符号了
register read     //读取所有寄存器的值  
register write x10 100    //将寄存器的x10的值设置为100 

• bt
  打印堆栈