Annotation of /sml/trunk/src/compiler/MiscUtil/profile/btrace.sml

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1 :	blume	675	(*
2 :			* Perform Absyn annotations for back-tracing support.
3 :			* This adds a bt_add at the entry point of each FNexp,
4 :			* a push-restore sequence (bt_push) at each non-tail call site of
5 :			* a non-primitive function, and a save-restore sequence to each HANDLEexp.
6 :			*
7 :			* Copyright (c) 2000 by Lucent Bell Laboratories
8 :			*
9 :			* author: Matthias Blume (blume@kurims.kyoto-u.ac.jp)
10 :			*)
11 :			local
12 :			structure A = Absyn
13 :			structure SE = StaticEnv
14 :			structure CB = CompBasic
15 :			structure SP = SymPath
16 :			structure EM = ErrorMsg
17 :			structure VC = VarCon
18 :			structure BT = BasicTypes
19 :			structure II = InlInfo
20 :			structure EU = ElabUtil
21 :
22 :			structure Dummy = BTImp (* mention it, so it gets made! *)
23 :			in
24 :
25 :			signature BTRACE = sig
26 :			val instrument : SE.staticEnv * CB.compInfo -> A.dec -> A.dec
27 :			end
28 :
29 :			structure BTrace :> BTRACE = struct
30 :
31 :	blume	677	exception NoCore
32 :
33 :	blume	675	fun impossible s = EM.impossible ("BTrace: " ^ s)
34 :
35 :			infix -->
36 :			val op --> = BT.-->
37 :
38 :	blume	677	val i_i_Ty = BT.intTy --> BT.intTy
39 :			val ii_u_Ty = BT.tupleTy [BT.intTy, BT.intTy] --> BT.unitTy
40 :	blume	675	val u_u_Ty = BT.unitTy --> BT.unitTy
41 :			val u_u_u_Ty = BT.unitTy --> u_u_Ty
42 :	blume	677	val iis_u_Ty = BT.tupleTy [BT.intTy, BT.intTy, BT.unitTy] --> BT.unitTy
43 :	blume	675
44 :			fun instrument0 (senv, cinfo: CB.compInfo) d = let
45 :
46 :			val matchstring = #errorMatch cinfo
47 :
48 :			val mkv = #mkLvar cinfo
49 :
50 :			fun tmpvar (n, t) = let
51 :			val sy = Symbol.varSymbol n
52 :			in
53 :			VC.VALvar { access = Access.namedAcc (sy, mkv), info = II.nullInfo,
54 :			path = SP.SPATH [sy], typ = ref t }
55 :			end
56 :
57 :			val isSpecial = let
58 :			val l = [SpecialSymbols.paramId,
59 :			SpecialSymbols.functorId,
60 :			SpecialSymbols.hiddenId,
61 :			SpecialSymbols.tempStrId,
62 :			SpecialSymbols.tempFctId,
63 :			SpecialSymbols.fctbodyId,
64 :			SpecialSymbols.anonfsigId,
65 :			SpecialSymbols.resultId,
66 :			SpecialSymbols.returnId,
67 :			SpecialSymbols.internalVarId]
68 :			in
69 :			fn s => List.exists (fn s' => Symbol.eq (s, s')) l
70 :			end
71 :
72 :			fun cons (s, []) = if isSpecial s then [] else [(s, 0)]
73 :			| cons (s, l as ((s', m) :: t)) =
74 :			if isSpecial s then l
75 :			else if Symbol.eq (s, s') then (s, m+1) :: t
76 :			else (s, 0) :: l
77 :
78 :			fun getCore s = let
79 :	blume	677	fun err _ _ _ = raise NoCore
80 :	blume	675	in
81 :			Lookup.lookVal (senv, SP.SPATH [CoreSym.coreSym,
82 :			Symbol.varSymbol s], err)
83 :			end
84 :
85 :			fun getCoreVal s =
86 :			case getCore s of
87 :			VC.VAL r => r
88 :			| _ => impossible "getCoreVal"
89 :
90 :			fun getCoreCon s =
91 :			case getCore s of
92 :			VC.CON c => c
93 :			| _ => impossible "getCoreCon"
94 :
95 :	blume	677	val bt_reserve = getCoreVal "bt_reserve"
96 :	blume	675	val bt_register = getCoreVal "bt_register"
97 :			val bt_save = getCoreVal "bt_save"
98 :			val bt_push = getCoreVal "bt_push"
99 :			val bt_add = getCoreVal "bt_add"
100 :			val matchcon = getCoreCon "Match"
101 :
102 :	blume	677	val bt_register_var = tmpvar ("<bt_register>", iis_u_Ty)
103 :	blume	675	val bt_save_var = tmpvar ("<bt_save>", u_u_u_Ty)
104 :			val bt_push_var = tmpvar ("<bt_push>", u_u_u_Ty)
105 :	blume	677	val bt_add_var = tmpvar ("<bt_add>", ii_u_Ty)
106 :			val bt_reserve_var = tmpvar ("<bt_reserve>", i_i_Ty)
107 :			val bt_module_var = tmpvar ("<bt_module>", BT.intTy)
108 :	blume	675
109 :			fun VARexp v = A.VARexp (ref v, [])
110 :			fun INTexp i = A.INTexp (IntInf.fromInt i, BT.intTy)
111 :
112 :			val uExp = EU.unitExp
113 :			val pushexp = A.APPexp (VARexp bt_push_var, uExp)
114 :			val saveexp = A.APPexp (VARexp bt_save_var, uExp)
115 :
116 :	blume	677	fun mkaddexp id = A.APPexp (VARexp bt_add_var,
117 :			EU.TUPLEexp [VARexp bt_module_var,
118 :			INTexp id])
119 :	blume	675	fun mkregexp (id, s) =
120 :			A.APPexp (VARexp bt_register_var,
121 :	blume	677	EU.TUPLEexp [VARexp bt_module_var,
122 :			INTexp id, A.STRINGexp s])
123 :	blume	675
124 :			val regexps = ref []
125 :	blume	677	val next = ref 0
126 :	blume	675
127 :			fun mkadd (id, s) =
128 :			(regexps := mkregexp (id, s) :: !regexps;
129 :			mkaddexp id)
130 :
131 :			fun VALdec (v, e) =
132 :			A.VALdec [A.VB { pat = A.VARpat v, exp = e,
133 :			tyvars = ref [], boundtvs = [] }]
134 :			fun LETexp (v, e, b) = A.LETexp (VALdec (v, e), b)
135 :			fun AUexp v = A.APPexp (VARexp v, uExp) (* apply to unit *)
136 :
137 :			fun is_prim_exp (A.VARexp (ref (VC.VALvar v), _)) =
138 :			II.isPrimInfo (#info v)
139 :			| is_prim_exp (A.CONexp _) = true
140 :			| is_prim_exp (A.CONSTRAINTexp (e, _)) = is_prim_exp e
141 :			| is_prim_exp (A.MARKexp (e, _)) = is_prim_exp e
142 :			| is_prim_exp _ = false
143 :
144 :	blume	678	fun is_raise_exp (A.RAISEexp _) = true
145 :			| is_raise_exp (A.MARKexp (e, _) |
146 :			A.CONSTRAINTexp (e, _) |
147 :			A.SEQexp [e]) = is_raise_exp e
148 :			| is_raise_exp _ = false
149 :
150 :	blume	675	fun i_exp _ loc (A.RECORDexp l) =
151 :			A.RECORDexp (map (fn (l, e) => (l, i_exp false loc e)) l)
152 :			| i_exp _ loc (A.SELECTexp (l, e)) =
153 :			A.SELECTexp (l, i_exp false loc e)
154 :			| i_exp _ loc (A.VECTORexp (l, t)) =
155 :			A.VECTORexp (map (i_exp false loc) l, t)
156 :			| i_exp tail loc (A.PACKexp (e, t, tcl)) =
157 :			A.PACKexp (i_exp tail loc e, t, tcl)
158 :			| i_exp tail loc (e as A.APPexp (f, a)) =
159 :			if tail orelse is_prim_exp f then
160 :			A.APPexp (i_exp false loc f, i_exp false loc a)
161 :			else let
162 :			val mainexp = A.APPexp (i_exp false loc f,
163 :			i_exp false loc a)
164 :			val ty = Reconstruct.expType e
165 :			val result = tmpvar ("tmpresult", ty)
166 :			val restore = tmpvar ("tmprestore", u_u_Ty)
167 :			in
168 :			LETexp (restore, pushexp,
169 :			LETexp (result, mainexp,
170 :			A.SEQexp [AUexp restore, VARexp result]))
171 :			end
172 :			| i_exp tail loc (A.HANDLEexp (e, A.HANDLER (A.FNexp (rl, t)))) = let
173 :			val restore = tmpvar ("tmprestore", u_u_Ty)
174 :	blume	678	fun rule (r as A.RULE (p, e)) =
175 :			if is_raise_exp e then r
176 :			else A.RULE (p, A.SEQexp [AUexp restore, i_exp tail loc e])
177 :	blume	675	in
178 :			LETexp (restore, saveexp,
179 :			A.HANDLEexp (i_exp false loc e,
180 :			A.HANDLER (A.FNexp (map rule rl, t))))
181 :			end
182 :			| i_exp _ _ (A.HANDLEexp _) = impossible "bad HANDLEexp"
183 :			| i_exp _ loc (A.RAISEexp (e, t)) =
184 :			A.RAISEexp (i_exp false loc e, t)
185 :			| i_exp tail loc (A.CASEexp (e, rl, b)) =
186 :			A.CASEexp (i_exp false loc e, map (i_rule tail loc) rl, b)
187 :			| i_exp tail loc (A.FNexp (rl, t)) = let
188 :			fun name ((s, 0), a) = Symbol.name s :: a
189 :			| name ((s, m), a) = Symbol.name s :: "[" ::
190 :			Int.toString (m + 1) :: "]" :: a
191 :			fun dot ([z], a) = name (z, a)
192 :			| dot (h :: t, a) = dot (t, "." :: name (h, a))
193 :			| dot ([], a) = impossible "FNexp: no path"
194 :			val (n, r) = loc
195 :			val ms = matchstring r
196 :			val descr = concat (ms :: ": " :: dot (n, []))
197 :	blume	677	val id = !next
198 :			val _ = next := id + 1
199 :	blume	675	val addexp = mkadd (id, descr)
200 :			val arg = tmpvar ("fnvar", t)
201 :			val rl' = map (i_rule true loc) rl
202 :			val re = let
203 :			val A.RULE (_, lst) = List.last rl
204 :			val t = Reconstruct.expType lst
205 :			in
206 :			A.RAISEexp (A.CONexp (matchcon, []), t)
207 :			end
208 :			in
209 :			A.FNexp ([A.RULE (A.VARpat arg,
210 :			A.SEQexp [addexp,
211 :			A.CASEexp (A.VARexp (ref arg, []),
212 :			rl', true)]),
213 :			A.RULE (A.WILDpat, re)],
214 :			t)
215 :			end
216 :			| i_exp tail loc (A.LETexp (d, e)) =
217 :			A.LETexp (i_dec loc d, i_exp tail loc e)
218 :			| i_exp tail loc (A.SEQexp l) =
219 :			A.SEQexp (#1 (foldr (fn (e, (l, t)) => (i_exp t loc e :: l, false))
220 :			([], tail) l))
221 :			| i_exp tail loc (A.CONSTRAINTexp (e, t)) =
222 :			A.CONSTRAINTexp (i_exp tail loc e, t)
223 :			| i_exp tail (n, _) (A.MARKexp (e, r)) =
224 :			A.MARKexp (i_exp tail (n, r) e, r)
225 :			| i_exp _ _ e = e
226 :
227 :			and i_dec loc (A.VALdec l) = A.VALdec (map (i_vb loc) l)
228 :			| i_dec loc (A.VALRECdec l) = A.VALRECdec (map (i_rvb loc) l)
229 :			| i_dec loc (A.ABSTYPEdec { abstycs, withtycs, body }) =
230 :			A.ABSTYPEdec { abstycs = abstycs, withtycs = withtycs,
231 :			body = i_dec loc body }
232 :			| i_dec loc (A.EXCEPTIONdec l) = A.EXCEPTIONdec (map (i_eb loc) l)
233 :			| i_dec loc (A.STRdec l) = A.STRdec (map (i_strb loc) l)
234 :			| i_dec loc (A.ABSdec l) = A.ABSdec (map (i_strb loc) l)
235 :			| i_dec loc (A.FCTdec l) = A.FCTdec (map (i_fctb loc) l)
236 :			| i_dec loc (A.LOCALdec (d, d')) =
237 :			A.LOCALdec (i_dec loc d, i_dec loc d')
238 :			| i_dec loc (A.SEQdec l) = A.SEQdec (map (i_dec loc) l)
239 :			| i_dec (n, _) (A.MARKdec (d, r)) = A.MARKdec (i_dec (n, r) d, r)
240 :			| i_dec _ d = d
241 :
242 :			and i_rule tail loc (A.RULE (p, e)) = A.RULE (p, i_exp tail loc e)
243 :
244 :			and i_vb (n, r) (vb as A.VB { pat, exp, boundtvs, tyvars }) = let
245 :			fun gv (A.VARpat v) = SOME v
246 :			| gv (A.CONSTRAINTpat (p, _)) = gv p
247 :			| gv (A.LAYEREDpat (p, p')) =
248 :			(case gv p of
249 :			SOME v => SOME v
250 :			| NONE => gv p')
251 :			| gv _ = NONE
252 :			fun recur n = A.VB { pat = pat, exp = i_exp false (n, r) exp,
253 :			boundtvs = boundtvs, tyvars = tyvars }
254 :			in
255 :			case gv pat of
256 :			SOME (VC.VALvar { path = SP.SPATH [x], info, ... }) =>
257 :			if II.isPrimInfo info then vb else recur (cons (x, n))
258 :			| SOME (VC.VALvar { info, ... }) =>
259 :			if II.isPrimInfo info then vb else recur n
260 :			| _ => recur n
261 :			end
262 :
263 :			and i_rvb (n, r) (A.RVB { var, exp, boundtvs, resultty, tyvars }) = let
264 :			val x =
265 :			case var of
266 :			VC.VALvar { path = SymPath.SPATH [x], ... } => x
267 :			| _ => impossible "VALRECdec"
268 :			in
269 :			A.RVB { var = var, exp = i_exp false (cons (x, n), r) exp,
270 :			boundtvs = boundtvs, resultty = resultty, tyvars = tyvars }
271 :			end
272 :
273 :			and i_eb loc (A.EBgen { exn, etype, ident }) =
274 :			A.EBgen { exn = exn, etype = etype, ident = i_exp false loc ident }
275 :			| i_eb _ eb = eb
276 :
277 :			and i_strb (n, r) (A.STRB { name, str, def }) =
278 :			A.STRB { name = name, str = str,
279 :			def = i_strexp (cons (name, n), r) def }
280 :
281 :			and i_fctb (n, r) (A.FCTB { name, fct, def }) =
282 :			A.FCTB { name = name, fct = fct,
283 :			def = i_fctexp (cons (name, n), r) def }
284 :
285 :			and i_strexp loc (A.LETstr (d, s)) =
286 :			A.LETstr (i_dec loc d, i_strexp loc s)
287 :			| i_strexp (n, _) (A.MARKstr (s, r)) =
288 :			A.MARKstr (i_strexp (n, r) s, r)
289 :			| i_strexp _ s = s
290 :
291 :			and i_fctexp loc (A.FCTfct { param, argtycs, def }) =
292 :			A.FCTfct { param = param, argtycs = argtycs,
293 :			def = i_strexp loc def }
294 :			| i_fctexp loc (A.LETfct (d, f)) =
295 :			A.LETfct (i_dec loc d, i_fctexp loc f)
296 :			| i_fctexp (n, _) (A.MARKfct (f, r)) =
297 :			A.MARKfct (i_fctexp (n, r) f, r)
298 :			| i_fctexp _ f = f
299 :
300 :			val d' = i_dec ([], (0, 0)) d
301 :			in
302 :	blume	677	A.LOCALdec (A.SEQdec [VALdec (bt_reserve_var, AUexp bt_reserve),
303 :			VALdec (bt_module_var,
304 :			A.APPexp (VARexp bt_reserve_var,
305 :			INTexp (!next))),
306 :			VALdec (bt_save_var, AUexp bt_save),
307 :	blume	675	VALdec (bt_push_var, AUexp bt_push),
308 :			VALdec (bt_register_var, AUexp bt_register),
309 :			VALdec (bt_add_var,
310 :			A.SEQexp (!regexps @ [AUexp bt_add]))],
311 :			d')
312 :			end
313 :
314 :			fun instrument params d =
315 :	blume	677	if SMLofNJ.Internals.BTrace.mode NONE then
316 :			instrument0 params d
317 :			handle NoCore => d (* this takes care of core.sml *)
318 :	blume	675	else d
319 :			end
320 :
321 :			end (* local *)

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