如何使用systemtap抓取golang用户态程序系统堆栈

首先是在systemtap脚本中定义能够抓取golang堆栈的功能函数：

```function print_time_now() {

  ms = gettimeofday_us()

  sec = gettimeofday_s()

  printf(“%s %d\(us\)\n”,ctime(sec),ms-sec*1000000 )

}

function print_x8664_gostack(){

  goBaseName = “runtime.go exit”

  rip = u_register(“rip”)

  rbp_itr = u_register(“rbp”)

  funcName = usymname(rip)

  fileLine = usymline(rip)

  printf(“%p: %s\n”,rip,funcName)

  while(funcName != goBaseName && rbp_itr !=0){

  funcName = usymname(user_long(rbp_itr+8))

  fileLine = usymline(user_long(rbp_itr+8))

  printf(“%p: %s \n”,user_long(rbp_itr+8),funcName)

  rbp_itr = user_long(rbp_itr)

  }

  printf(“……….……..\n”) 

}

function dumpProccessInfo(){

  printf(“pid:%d, tid:%d, pid name:%s, ppid:%d, ppid name:%s, func:%s, cmd:%s \n”,pid(),tid(),pid2execname(pid()),ppid(), pid2execname(ppid()), ppfunc(), cmdline_str())

)

}```

/*实际使用上述函数的例子*/

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