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monnier |
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(* prof-control.sml
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*
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* COPYRIGHT (c) 1996 AT&T Research.
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*
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* This structure implements the interface to the run-time system's profiling
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* support library. It is not meant for general use.
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*
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*)
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structure ProfControl : PROF_CONTROL =
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struct
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structure CI = Unsafe.CInterface
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val setTimer : bool -> unit
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= CI.c_function "SMLNJ-Prof" "setTimer"
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val getQuantum : unit -> int
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= CI.c_function "SMLNJ-Prof" "getQuantum"
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val setTimeArray' : int array option -> unit
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= CI.c_function "SMLNJ-Prof" "setTimeArray"
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val profMode = ref false (* controls profile instrumentation *)
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val timingMode = ref false (* controls profile timer *)
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val times = ref (Array.array(0, 0))
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fun getTimingMode () = !timingMode
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(* set the timer count array *)
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fun setTimeArray arr = (
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if !timingMode then setTimeArray'(SOME arr) else ();
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times := arr)
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fun getTimeArray () = !times
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fun resetTimeArray () = let
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fun zero a = Array.modify (fn _ => 0) a
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in
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zero (!times)
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end
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fun profileOn () = if !timingMode
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then ()
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else (timingMode := true; setTimeArray'(SOME(!times)); setTimer true)
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fun profileOff () = if !timingMode
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then (setTimer false; setTimeArray' NONE; timingMode := false)
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else ()
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datatype compunit = UNIT of {
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base: int,
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size: int,
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counts: int Array.array,
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names: string
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}
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val runTimeIndex = 0
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val minorGCIndex = 1
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val majorGCIndex = 2
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val otherIndex = 3
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val compileIndex = 4
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val numPredefIndices = 5
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val current : int ref = Core.Assembly.profCurrent
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val _ = (
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setTimeArray(Array.array(numPredefIndices, 0));
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current := otherIndex)
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fun increase n = let
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val old = getTimeArray()
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in
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if n <= Array.length old
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then ()
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else let val new = Array.array(n+n, 0)
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in
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Array.copy{di=0, dst=new, len=NONE, si=0, src = old};
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setTimeArray new
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end
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end
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val units = ref [UNIT{
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base = 0,
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size = numPredefIndices,
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counts = Array.array(numPredefIndices, 0),
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names = "\
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\Run-time System\n\
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\Minor GC\n\
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\Major GC\n\
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\Other\n\
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\Compilation\n"
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}];
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(* count the number of newlines in a string *)
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fun newlines s = let
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fun notNL #"\n" = false | notNL _ = true
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fun f (ss, count) = let
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val ss = Substring.dropl notNL ss
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in
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if Substring.isEmpty ss
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then count
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else f (Substring.triml 1 ss, count+1)
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end
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in
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f (Substring.all s, 0)
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end
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fun register names = let
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val ref (list as UNIT{base,size,...}::_) = units
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val count = newlines names
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val a = Array.array(count,0)
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val b = base+size
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in
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increase(b+count);
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units := UNIT{base=b,size=count,counts=a,names=names}::list;
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(b,a,current)
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end
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val _ = Core.profile_register := register;
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fun reset() = let
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fun zero a = Array.modify (fn _ => 0) a
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in
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resetTimeArray();
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List.app (fn UNIT{counts,...}=> zero counts) (!units)
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end
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(* space profiling hooks *)
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val spaceProfiling = ref false
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val spaceProfRegister :
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(Unsafe.Object.object * string -> Unsafe.Object.object) ref =
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Unsafe.cast Core.profile_sregister
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end
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