|
; 0x764 1892
rip 0xa875dd 0xa875dd <kslskgs+231>
(gdb) ni
0x0000000000a875df in kslskgs ()
(gdb) info regi r13 rip
r13 0x764 1892
rip 0xa875df 0xa875df <kslskgs+233>
(gdb) ni
0x0000000000a875e3 in kslskgs ()
(gdb) info regi r13 rip
r13 0x763 1891
rip 0xa875e3 0xa875e3 <kslskgs+237>
--//可以确定循环开头在0xa875be地址.也是9条指令.
(gdb) disassemble kslskgs
--//反汇编看看.
...
0x0000000000a875be <kslskgs+200>: mov $0x4000000000000000,%rsi
0x0000000000a875c8 <kslskgs+210>: cmp %rsi,%rbx
0x0000000000a875cb <kslskgs+213>: je 0xa876db <kslskgs+485>
0x0000000000a875d1 <kslskgs+219>: test %rbx,%rbx
0x0000000000a875d4 <kslskgs+222>: je 0xa876db <kslskgs+485>
0x0000000000a875da <kslskgs+228>: mov (%r14),%rbx
0x0000000000a875dd <kslskgs+231>: pause
0x0000000000a875df <kslskgs+233>: add $0xffffffffffffffff,%r13d
0x0000000000a875e3 <kslskgs+237>: jne 0xa875be <kslskgs+200>
3.重复前面测试,先写出gdb脚本:
$ cat spin_s.gdb
break kslgetl
commands
silent
printf "kslgetl %x, %d, %d, %d\n", $rdi, $rsi, $rdx, $rcx
c
end
break kslges
commands
silent
printf "kslges %x, %d, %d, %d\n", $rdi, $rsi, $rdx, $rcx
c
end
break skgpwwait
commands
silent
printf "skgpwwait %d, %d, %d, %d\n", $rdi, $rsi, $rdx, $rcx
c
end
break sskgpwwait
commands
silent
printf "sskgpwwait %d, %d, %d, %d\n", $rdi, $rsi, $rdx, $rcx
c
end
break semop
commands
silent
printf "semop %d, %d, %d, %d\n", $rdi, $rsi, $rdx, $rcx
c
end
break *0x93f9ddc
commands
silent
printf " spin count loop: %d %d %x\n", $rax,$rcx,$rip
c
end
##今天加入的内容
break ksl_get_shared_latch
commands
silent
printf "ksl_get_shared_latch laddr:%x, willing:%d, where:%d, why:%d, mode:%d\n", $rdi, $rsi, $rdx, $rcx, $r8
c
end
break kslgess
commands
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