SystemTap-examples/fileline-profile.stp at master · boat0/SystemTap-examples · GitHub

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#! /usr/bin/env stap

%( CONFIG_64BIT == "y" %?
global profile%[20000], pcount
%:
# On a 32-bit platform, the profile array must be smaller, otherwise
# its allocation will fail on module startup.
global profile%[5000], pcount
%)
// configurable options
global symbolname = ""

probe timer.profile {
  pcount <<< 1

  uaddrinfo = ""
  ufileline = ""
  if (user_mode()) {
    ufileline = usymfileline(uaddr())
    if (strtol(ufileline, 16))
      uaddrinfo = usymdata(uaddr())
    else {
      if (symbolname != "")
        uaddrinfo = usymname(uaddr())."@"
      uaddrinfo .= ufileline
    }
    profile[uaddrinfo, 0] <<< 1
  } else {
     profile["", addr()] <<< 1
  }
}
probe end {
  printf ("\n--- %d samples recorded:\n", @count(pcount))
  foreach ([sfl, address] in profile- limit 20) {
    if (sfl != "")
      printf ("u:%-60s\t%6d\n", sfl, @count(profile[sfl, address]))
    else {
      addrinfo = ""
      fileline = symfileline(address)
      if (strtol(fileline, 16))
        addrinfo = symdata(address)
      else {
        if (symbolname != "")
          addrinfo = symname(address)."@"
        addrinfo .= fileline
      }
      printf ("k:%-60s\t%6d\n", addrinfo, @count(profile[sfl, address]))
    }
  }
}