Swift on lx with dtrace!

dtrace fun

root@3e4601c0-00af-4d93-c8b2-f4584487aa7c:~# dtrace -ln pid18959:main::entry
   ID   PROVIDER            MODULE                          FUNCTION NAME
14543   pid18959              main                              main entry
14693   pid18959              main              _TF4main6findMeFT_Si entry
14694   pid18959              main                   _TF4main1bFT_Si entry
14695   pid18959              main                   __libc_csu_init entry
14696   pid18959              main                   __libc_csu_fini entry

root@3e4601c0-00af-4d93-c8b2-f4584487aa7c:~# dtrace -ln pid18959:main::entry | swift-demangle
   ID   PROVIDER            MODULE                          FUNCTION NAME
14543   pid18959              main                              main entry
14693   pid18959              main              main.findMe () -> Swift.Int entry
14694   pid18959              main                   main.b () -> Swift.Int entry
14695   pid18959              main                   __libc_csu_init entry
14696   pid18959              main                   __libc_csu_fini entry


root@3e4601c0-00af-4d93-c8b2-f4584487aa7c:~# dtrace -Fn 'pid$target:main::entry, pid$target:main::return' -p `pgrep main`
dtrace: description 'pid$target:main::entry, pid$target:main::return' matched 9 probes
CPU FUNCTION
 20  -> _TF4main6findMeFT_Si
 20    -> _TF4main1bFT_Si
 20    <- _TF4main1bFT_Si
 20  <- _TF4main6findMeFT_Si
 20  -> _TF4main6findMeFT_Si
 20    -> _TF4main1bFT_Si
 20    <- _TF4main1bFT_Si
 20  <- _TF4main6findMeFT_Si
 20  -> _TF4main6findMeFT_Si
 
 
 
 root@3e4601c0-00af-4d93-c8b2-f4584487aa7c:~# swift-demangle < output.txt
 20  -> main.findMe () -> Swift.Int
 20    -> main.b () -> Swift.Int
 20    <- main.b () -> Swift.Int
 20  <- main.findMe () -> Swift.Int
 20  -> main.findMe () -> Swift.Int
 20    -> main.b () -> Swift.Int
 20    <- main.b () -> Swift.Int
 20  <- main.findMe () -> Swift.Int
 20  -> main.findMe () -> Swift.Int

main.swift

func findMe() -> Int {
  let value = b()
  return value
}

func b() -> Int {
  let result = 1 + 1
  return result
}

while 1 == 1 {
  findMe()
}