Linux/Android 2.6.29에서 시스템 호출 후크가 매번 다른 결과를 생성하는 이유는 무엇입니까?

Android 2.6.29를 통과했습니다 . LKM moduleAndroid 애플리케이션의 시스템 호출을 추적하고 있습니다. 하지만 재미있는 점은 시스템 호출 목록을 얻을 때마다 다른 결과가 반환된다는 것입니다.

코드 섹션에서는 굵은 텍스트를 사용할 수 없으므로 차이점이 시작되는 위치를 표시하기 위해 **를 사용합니다.

예를 들어,

첫 번째 실행:

our_sys_gettid ---> uid = 10028  
 our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0 
 our_sys_write ---> uid = 10028 with fd= 30, buf = 230 and count=3 
 our_sys_close ---> uid = 10028 with fd= 30  
 our_sys_setpriority ---> uid = 10028 with which= 0, who=230 and niceval=0 
 our_sys_futex ---> uid = 10028 with uadd=������, op=1, val=1, utime=<NULL>, uaddr2=������ and val3=  
 **our_sys_gettid ---> uid = 10028  
 our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0 
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196467192 
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196467192 **
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196466496 
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3196466496 
 our_sys_dup ---> uid = 10028 with fildes=32 
 our_sys_close ---> uid = 10028 with fd= 32  
 .....................

두 번째 실행:

our_sys_gettid ---> uid = 10028  
 our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0 
 our_sys_write ---> uid = 10028 with fd= 30, buf = 228 and count=3 
 our_sys_close ---> uid = 10028 with fd= 30  
 our_sys_setpriority ---> uid = 10028 with which= 0, who=228 and niceval=0 
 our_sys_futex ---> uid = 10028 with uadd=������, op=1, val=1, utime=<NULL>, uaddr2=������ and val3=  
 **our_sys_gettid ---> uid = 10028  
 our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0 
 our_sys_write ---> uid = 10028 with fd= 30, buf = 228 and count=3 
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198662648 
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198662648 
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198661952** 
 our_sys_close ---> uid = 10028 with fd= 30  
 our_sys_setpriority ---> uid = 10028 with which= 0, who=228 and niceval=0 
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=1181359656 
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198661952 
 our_sys_dup ---> uid = 10028 with fildes=32 
 our_sys_close ---> uid = 10028 with fd= 32  
 ....................

세 번째 실행:

our_sys_gettid ---> uid = 10028  
 our_sys_open ---> uid = 10028 with filename= /dev/cpuctl//tasks, flags= 131073, mode=0 
 our_sys_write ---> uid = 10028 with fd= 31, buf = 228 and count=3 
 our_sys_close ---> uid = 10028 with fd= 31  
 our_sys_setpriority ---> uid = 10028 with which= 0, who=228 and niceval=0 
 our_sys_futex ---> uid = 10028 with uadd=������, op=1, val=1, utime=<NULL>, uaddr2=������ and val3=X{�D  
 **our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035960 
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035960 
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_clock_gettime ---> uid = 10028 with which_clock=<NULL>, tp =   
 our_sys_munmap ---> uid = 10028 with addr=1183178752 and len=770048 
 our_sys_close ---> uid = 10028 with fd= 32**  
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035264 
 our_sys_ioctl ---> uid = 10028 with fd=21, cmd=3222823425 and arg=3198035264 
 our_sys_dup ---> uid = 10028 with fildes=31 
 our_sys_close ---> uid = 10028 with fd= 31  
 ........................

왜 매번 다른 결과가 나오는지 아시나요?

시스템 호출을 추적하는 데 더 좋은 도구가 있습니까? 등등에 대해 들어봤지만 strace/ptraceAndroid auditd에서 작동하는지 확실하지 않습니다.