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papertigers/dtrace fun

Created December 3, 2015 22:26
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Swift on lx with dtrace!
Raw
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
Raw
main.swift
func findMe() -> Int {
let value = b()
return value
}
func b() -> Int {
let result = 1 + 1
return result
}
while 1 == 1 {
findMe()
}
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