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[smlnj] Annotation of /sml/trunk/src/cm/compile/compile.sml
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Annotation of /sml/trunk/src/cm/compile/compile.sml

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1 : blume 402 (*
2 :     * Compilation traversals.
3 :     *
4 :     * (C) 1999 Lucent Technologies, Bell Laboratories
5 :     *
6 :     * Author: Matthias Blume (blume@kurims.kyoto-u.ac.jp)
7 :     *)
8 : blume 398 local
9 :     structure GP = GeneralParams
10 :     structure DG = DependencyGraph
11 :     structure GG = GroupGraph
12 :     structure E = GenericVC.Environment
13 : blume 587 structure SE = GenericVC.StaticEnv
14 : blume 398 structure Pid = GenericVC.PersStamps
15 :     structure DE = GenericVC.DynamicEnv
16 :     structure PP = PrettyPrint
17 :     structure EM = GenericVC.ErrorMsg
18 : blume 757 structure SF = GenericVC.SmlFile
19 : blume 398
20 :     type pid = Pid.persstamp
21 :     type statenv = E.staticEnv
22 :     type symenv = E.symenv
23 :     type result = { stat: statenv, sym: symenv }
24 : blume 460 type ed = IInfo.info
25 : blume 398 in
26 :     signature COMPILE = sig
27 : blume 402
28 : blume 400 type bfc
29 : blume 771 type stats
30 : blume 400
31 : blume 398 (* reset internal persistent state *)
32 :     val reset : unit -> unit
33 : blume 399
34 :     (* notify linkage module about recompilation *)
35 : blume 400 type notifier = GP.info -> SmlInfo.info -> unit
36 : blume 399
37 : blume 403 (* type of a function to store away the binfile contents *)
38 : blume 771 type bfcReceiver =
39 :     SmlInfo.info * { content: bfc, stats: stats } -> unit
40 : blume 403
41 : blume 398 val getII : SmlInfo.info -> IInfo.info
42 : blume 399
43 : blume 537 val evictStale : unit -> unit
44 : blume 402 val evictAll : unit -> unit
45 : blume 399
46 : blume 771 val newSbnodeTraversal : unit -> DG.sbnode -> GP.info -> ed option
47 : blume 400
48 : blume 403 val newTraversal : notifier * bfcReceiver * GG.group ->
49 : blume 399 { group: GP.info -> result option,
50 : blume 801 allgroups: GP.info -> bool,
51 : blume 399 exports: (GP.info -> result option) SymbolMap.map }
52 : blume 398 end
53 :    
54 : blume 448 functor CompileFn (structure MachDepVC : MACHDEP_VC
55 : blume 588 structure StabModmap : STAB_MODMAP
56 : blume 677 val useStream : TextIO.instream -> unit
57 : blume 666 val compile_there : SrcPath.file -> bool) :>
58 : blume 771 COMPILE where type bfc = MachDepVC.Binfile.bfContent
59 :     where type stats = MachDepVC.Binfile.stats =
60 : blume 400 struct
61 : blume 398
62 : blume 400 type notifier = GP.info -> SmlInfo.info -> unit
63 : blume 399
64 : blume 398 structure BF = MachDepVC.Binfile
65 :    
66 :     type bfc = BF.bfContent
67 : blume 771 type stats = BF.stats
68 : blume 398
69 : blume 771 type bfcReceiver =
70 :     SmlInfo.info * { content: bfc, stats: stats } -> unit
71 : blume 403
72 : blume 447 structure FilterMap = MapFn
73 : blume 398 (struct
74 :     type ord_key = pid * SymbolSet.set
75 :     fun compare ((u, f), (u', f')) =
76 :     case Pid.compare (u, u') of
77 :     EQUAL => SymbolSet.compare (f, f')
78 :     | unequal => unequal
79 :     end)
80 :    
81 : blume 403 type bfinfo =
82 :     { cmdata: PidSet.set,
83 :     statenv: unit -> statenv,
84 :     symenv: unit -> symenv,
85 :     statpid: pid,
86 :     sympid: pid }
87 :    
88 : blume 399 type env = { envs: unit -> result, pids: PidSet.set }
89 : blume 460 type envdelta = IInfo.info
90 : blume 398
91 : blume 460 type memo = { ii: IInfo.info, ts: TStamp.t, cmdata: PidSet.set }
92 : blume 398
93 :     (* persistent state! *)
94 :     val filtermap = ref (FilterMap.empty: pid FilterMap.map)
95 :    
96 :     (* more persistent state! *)
97 : blume 402 val globalstate = ref (SmlInfoMap.empty: memo SmlInfoMap.map)
98 : blume 398
99 :     fun reset () =
100 :     (filtermap := FilterMap.empty;
101 : blume 402 globalstate := SmlInfoMap.empty)
102 : blume 398
103 :     fun isValidMemo (memo: memo, provided, smlinfo) =
104 :     not (TStamp.needsUpdate { source = SmlInfo.lastseen smlinfo,
105 :     target = #ts memo })
106 : blume 403 andalso PidSet.equal (provided, #cmdata memo)
107 : blume 398
108 : blume 587 fun memo2ii (memo: memo) = #ii memo
109 : blume 398
110 : blume 460 fun memo2ed memo = memo2ii memo
111 : blume 398
112 : blume 460 fun bfc2memo (bfc, ts) = let
113 : blume 403 val ii = { statenv = fn () => BF.senvOf bfc,
114 :     symenv = fn () => BF.symenvOf bfc,
115 :     statpid = BF.staticPidOf bfc,
116 :     sympid = BF.lambdaPidOf bfc }
117 :     val cmdata = PidSet.addList (PidSet.empty, BF.cmDataOf bfc)
118 :     in
119 : blume 460 { ii = ii, ts = ts, cmdata = cmdata }
120 : blume 403 end
121 :    
122 : blume 398 fun pidset (p1, p2) = PidSet.add (PidSet.singleton p1, p2)
123 :    
124 :     fun nofilter (ed: envdelta) = let
125 : blume 460 val { statenv, symenv, statpid, sympid } = ed
126 : blume 587 val statenv' = Memoize.memoize statenv
127 : blume 398 in
128 : blume 587 { envs = fn () => { stat = statenv' (), sym = symenv () },
129 : blume 398 pids = pidset (statpid, sympid) }
130 :     end
131 :    
132 : blume 735 fun requiredFiltering set se = let
133 :     val dom = SymbolSet.addList (SymbolSet.empty, E.catalogEnv se)
134 :     val filt = SymbolSet.intersection (set, dom)
135 :     in
136 :     if SymbolSet.equal (dom, filt) then NONE
137 :     else SOME filt
138 :     end
139 : blume 398
140 : blume 460 fun filter (ii, s) = let
141 : blume 398 val { statenv, symenv, statpid, sympid } = ii
142 : blume 587 val ste = statenv ()
143 : blume 398 in
144 : blume 735 case requiredFiltering s ste of
145 :     NONE => { envs = fn () => { stat = ste, sym = symenv () },
146 :     pids = pidset (statpid, sympid) }
147 :     | SOME s => let
148 : blume 587 val ste' = E.filterStaticEnv (ste, SymbolSet.listItems s)
149 :     val key = (statpid, s)
150 :     val statpid' =
151 :     case FilterMap.find (!filtermap, key) of
152 :     SOME statpid' => statpid'
153 :     | NONE => let
154 :     val statpid' = GenericVC.Rehash.rehash
155 :     { env = ste', orig_hash = statpid }
156 :     in
157 :     filtermap :=
158 :     FilterMap.insert (!filtermap, key, statpid');
159 :     statpid'
160 :     end
161 :     in
162 :     { envs = fn () => { stat = ste', sym = symenv () },
163 :     pids = pidset (statpid', sympid) }
164 :     end
165 : blume 398 end
166 :    
167 : blume 399 local
168 : blume 398 fun r2e { stat, sym } = E.mkenv { static = stat, symbolic = sym,
169 :     dynamic = DE.empty }
170 :     fun e2r e = { stat = E.staticPart e, sym = E.symbolicPart e }
171 :     in
172 : blume 399 (* This is a bit ugly because somehow we need to mix dummy
173 :     * dynamic envs into the equation just to be able to use
174 :     * concatEnv. But, alas', that's life... *)
175 :     fun rlayer (r, r') = e2r (E.concatEnv (r2e r, r2e r'))
176 :    
177 :     val emptyEnv =
178 :     { envs = fn () => e2r E.emptyEnv, pids = PidSet.empty }
179 : blume 398 end
180 :    
181 :     fun layer ({ envs = e, pids = p }, { envs = e', pids = p' }) =
182 :     { envs = fn () => rlayer (e (), e' ()),
183 :     pids = PidSet.union (p, p') }
184 :    
185 : blume 462 (* I would rather not use an exception here, but short of a better
186 :     * implementation of concurrency I see no choice.
187 :     * The problem is that at each node we sequentiallay wait for the
188 :     * children nodes. But the scheduler might (and probably will)
189 :     * let a child run that we are not currently waiting for, so an
190 :     * error there will not result in "wait" to immediately return
191 :     * as it should for clean error recovery.
192 :     * Using the exception avoids having to implement a
193 :     * "wait for any child -- whichever finishes first" kind of call. *)
194 :     exception Abort
195 : blume 399
196 : blume 462 fun layer'wait u (p, NONE) =
197 :     (ignore (Concur.waitU u p); NONE)
198 :     | layer'wait u (p, SOME e) =
199 :     (case Concur.waitU u p of
200 :     SOME e' => SOME (layer (e', e))
201 :     | NONE => NONE)
202 :    
203 : blume 454 fun mkTraversal (notify, storeBFC, getUrgency) = let
204 : blume 402 val localstate = ref SmlInfoMap.empty
205 : blume 398
206 : blume 537 fun sbnode gp (DG.SB_SNODE n) = snode gp n
207 :     (* The beauty of this scheme is that we don't have
208 :     * to do anything at all for SB_BNODEs: Everything
209 :     * is prepared ready to be used when the library
210 :     * is unpickled: *)
211 : blume 737 | sbnode gp (DG.SB_BNODE (_, ii, _)) = SOME ii
212 : blume 398
213 :     and fsbnode gp (f, n) =
214 :     case (sbnode gp n, f) of
215 :     (NONE, _) => NONE
216 :     | (SOME d, NONE) => SOME (nofilter d)
217 :     | (SOME d, SOME s) => SOME (filter (d, s))
218 :    
219 :     and snode gp (DG.SNODE n) = let
220 : blume 692 val youngest = #youngest gp
221 : blume 398 val { smlinfo = i, localimports = li, globalimports = gi } = n
222 :     val binname = SmlInfo.binname i
223 : blume 771 val descr = SmlInfo.descr i
224 : blume 398
225 : blume 771 fun pstats (s: BF.stats) = let
226 :     fun info ((sel, lab), (l, t)) =
227 :     case sel s of
228 :     0 => (l, t)
229 :     | n => (lab :: ": " :: Int.toString n ::
230 :     t :: " " :: l,
231 :     ",")
232 :     in
233 :     Say.vsay ("[" :: #1 (foldr info
234 :     (["bytes]\n"], "")
235 :     [(#code, "code"),
236 :     (#data, "data"),
237 :     (#env, "env"),
238 :     (#inlinfo, "inlinable")]))
239 :     end
240 :    
241 : blume 801 fun loaded _ = Say.vsay ["[loading ", descr, "]\n"]
242 :     fun received s =
243 :     (Say.vsay ["[receiving ", descr, "]\n"];
244 :     pstats s)
245 : blume 771
246 : blume 462 fun fail () =
247 :     if #keep_going (#param gp) then NONE else raise Abort
248 :    
249 : blume 537 fun compile_here (stat, sym, pids, split) = let
250 : blume 677 fun perform_setup _ NONE = ()
251 :     | perform_setup what (SOME code) =
252 :     (Say.vsay ["[setup (", what, "): ", code, "]\n"];
253 :     SafeIO.perform
254 :     { openIt = fn () => TextIO.openString code,
255 :     closeIt = TextIO.closeIn,
256 :     work = useStream,
257 :     cleanup = fn _ => () })
258 : blume 398 fun save bfc = let
259 : blume 757 fun writer s = let
260 : blume 771 val s = BF.write { stream = s, content = bfc,
261 :     nopickle = false }
262 :     in pstats s; s
263 : blume 757 end
264 : blume 459 fun cleanup _ =
265 : blume 398 OS.FileSys.remove binname handle _ => ()
266 :     in
267 : blume 400 notify gp i;
268 : blume 771 (SafeIO.perform { openIt =
269 : blume 398 fn () => AutoDir.openBinOut binname,
270 : blume 771 closeIt = BinIO.closeOut,
271 :     work = writer,
272 :     cleanup = cleanup }
273 :     before TStamp.setTime (binname, SmlInfo.lastseen i))
274 : blume 398 handle exn => let
275 :     fun ppb pps =
276 :     (PP.add_newline pps;
277 :     PP.add_string pps (General.exnMessage exn))
278 :     in
279 :     SmlInfo.error gp i EM.WARN
280 : blume 771 ("failed to write " ^ binname) ppb;
281 :     { code = 0, env = 0, inlinfo = 0, data = 0 }
282 :     end
283 : blume 398 end (* save *)
284 :     in
285 :     case SmlInfo.parsetree gp i of
286 : blume 462 NONE => fail ()
287 : blume 398 | SOME (ast, source) => let
288 : blume 592 val ast =
289 :     case #explicit_core_sym (SmlInfo.attribs i) of
290 :     NONE => ast
291 :     | SOME sy => CoreHack.rewrite (ast, sy)
292 : blume 398 val cmData = PidSet.listItems pids
293 : blume 677 val (pre, post) = SmlInfo.setup i
294 :     val toplenv = #get GenericVC.EnvRef.topLevel ()
295 :     before perform_setup "pre" pre
296 : blume 398 (* clear error flag (could still be set from
297 :     * earlier run) *)
298 :     val _ = #anyErrors source := false
299 : blume 537 val bfc = BF.create
300 : blume 587 { splitting = split,
301 : blume 537 cmData = cmData,
302 :     ast = ast,
303 :     source = source,
304 :     senv = stat,
305 : blume 592 symenv = sym }
306 : blume 460 val memo = bfc2memo (bfc, SmlInfo.lastseen i)
307 : blume 398 in
308 : blume 677 perform_setup "post" post;
309 :     #set GenericVC.EnvRef.topLevel toplenv;
310 : blume 771 storeBFC (i, { content = bfc, stats = save bfc });
311 : blume 402 SOME memo
312 : blume 757 end handle (EM.Error | SF.Compile _)
313 :     (* At this point we handle only
314 :     * explicit compiler bugs and ordinary
315 :     * compilation errors because for those
316 :     * there will already have been
317 :     * explanatory messages. Everything
318 :     * else "falls through" and will be
319 :     * treated at top level. *)
320 :     => fail ()
321 : blume 448 end (* compile_here *)
322 : blume 398 fun notlocal () = let
323 : blume 692 val _ = youngest := TStamp.max (!youngest,
324 :     SmlInfo.lastseen i)
325 : blume 454 val urgency = getUrgency i
326 : blume 402 (* Ok, it is not in the local state, so we first have
327 : blume 398 * to traverse all children before we can proceed... *)
328 :     fun loc li_n = Option.map nofilter (snode gp li_n)
329 :     fun glob gi_n = fsbnode gp gi_n
330 : blume 448 val gi_cl =
331 :     map (fn gi_n => Concur.fork (fn () => glob gi_n)) gi
332 :     val li_cl =
333 :     map (fn li_n => Concur.fork (fn () => loc li_n)) li
334 : blume 398 val e =
335 : blume 462 foldl (layer'wait urgency)
336 :     (foldl (layer'wait urgency)
337 : blume 537 (SOME emptyEnv)
338 : blume 462 gi_cl)
339 :     li_cl
340 : blume 398 in
341 :     case e of
342 :     NONE => NONE
343 :     | SOME { envs, pids } => let
344 :     (* We have successfully traversed all
345 :     * children. Now it is time to check the
346 :     * global map... *)
347 :     fun fromfile () = let
348 :     val { stat, sym } = envs ()
349 : blume 537 val { split, extra_compenv, ... } =
350 :     SmlInfo.attribs i
351 :     val stat =
352 :     case extra_compenv of
353 :     NONE => stat
354 :     | SOME s => E.layerStatic (stat, s)
355 : blume 398 fun load () = let
356 :     val ts = TStamp.fmodTime binname
357 :     fun openIt () = BinIO.openIn binname
358 : blume 588 fun reader s = let
359 :     val mm0 = StabModmap.get ()
360 :     val m = GenModIdMap.mkMap' (stat, mm0)
361 : blume 771 val { content, stats } =
362 :     BF.read { stream = s,
363 :     name = binname,
364 :     modmap = m }
365 : blume 588 in
366 : blume 771 (content, ts, stats)
367 : blume 588 end
368 : blume 403
369 : blume 398 in
370 :     SOME (SafeIO.perform
371 :     { openIt = openIt,
372 :     closeIt = BinIO.closeIn,
373 :     work = reader,
374 : blume 459 cleanup = fn _ => () })
375 : blume 398 handle _ => NONE
376 :     end (* load *)
377 : blume 801 fun tryload (sync, report, otherwise) =
378 :     case (sync (); load ()) of
379 : blume 448 NONE => otherwise ()
380 : blume 771 | SOME (bfc, ts, stats) => let
381 : blume 460 val memo = bfc2memo (bfc, ts)
382 : blume 771 val contst = { content = bfc,
383 :     stats = stats }
384 : blume 448 in
385 :     if isValidMemo (memo, pids, i) then
386 : blume 771 (report stats;
387 :     storeBFC (i, contst);
388 : blume 448 SOME memo)
389 :     else otherwise ()
390 :     end
391 : blume 801 fun sy0 () = ()
392 : blume 632 fun bottleneck () =
393 :     (* Are we the only runable task? *)
394 :     Servers.allIdle () andalso
395 :     Concur.noTasks ()
396 : blume 448 fun compile_again () =
397 : blume 771 (Say.vsay ["[compiling ", descr, "]\n"];
398 : blume 537 compile_here (stat, sym, pids, split))
399 : blume 632 fun compile_there' p =
400 :     not (bottleneck ()) andalso
401 :     compile_there p
402 : blume 448 fun compile () = let
403 :     val sp = SmlInfo.sourcepath i
404 : blume 801 fun sy () = let
405 :     fun ready () =
406 :     OS.FileSys.fileSize binname > 0
407 :     handle _ => false
408 :     in
409 :     (***** busy wait for file to appear;
410 :     * this is obviously very bad! *)
411 :     while not (ready ()) do ()
412 :     end
413 : blume 448 in
414 : blume 801 OS.FileSys.remove binname handle _ => ();
415 : blume 692 youngest := TStamp.NOTSTAMP;
416 : blume 632 if compile_there' sp then
417 : blume 801 tryload (sy, received, compile_again)
418 : blume 448 else compile_again ()
419 :     end
420 : blume 398 in
421 : blume 448 (* If anything goes wrong loading the first
422 :     * time, we go and compile. Compiling
423 :     * may mean compiling externally, and if so,
424 :     * we must load the result of that.
425 :     * If the second load also goes wrong, we
426 :     * compile locally to gather error messages
427 :     * and make everything look "normal". *)
428 : blume 801 tryload (sy0, loaded, compile)
429 : blume 398 end (* fromfile *)
430 : blume 402 fun notglobal () =
431 :     case fromfile () of
432 :     NONE => NONE
433 :     | SOME memo =>
434 :     (globalstate :=
435 :     SmlInfoMap.insert (!globalstate, i,
436 :     memo);
437 :     SOME memo)
438 : blume 398 in
439 : blume 402 case SmlInfoMap.find (!globalstate, i) of
440 :     NONE => notglobal ()
441 : blume 398 | SOME memo =>
442 :     if isValidMemo (memo, pids, i) then
443 : blume 402 SOME memo
444 :     else notglobal ()
445 : blume 398 end
446 :     end (* notlocal *)
447 :     in
448 : blume 462 (* Here we just wait (no "waitU") so we don't get
449 :     * priority over threads that may have to clean up after
450 :     * errors. *)
451 : blume 402 case SmlInfoMap.find (!localstate, i) of
452 : blume 448 SOME mopt_c => Option.map memo2ed (Concur.wait mopt_c)
453 : blume 398 | NONE => let
454 : blume 448 val mopt_c = Concur.fork
455 :     (fn () => notlocal () before
456 :     (* "Not local" means that we have not processed
457 :     * this file before. Therefore, we should now
458 :     * remove its parse tree... *)
459 :     SmlInfo.forgetParsetree i)
460 : blume 398 in
461 : blume 402 localstate :=
462 : blume 632 SmlInfoMap.insert (!localstate, i, mopt_c);
463 : blume 448 Option.map memo2ed (Concur.wait mopt_c)
464 : blume 398 end
465 :     end (* snode *)
466 :    
467 : blume 652 fun impexp gp (nth, _, _) = fsbnode gp (nth ())
468 : blume 399 in
469 :     { sbnode = sbnode, impexp = impexp }
470 :     end
471 : blume 398
472 : blume 587 fun newTraversal (_, _, GG.ERRORGROUP) =
473 : blume 801 { group = fn _ => NONE,
474 :     allgroups = fn _ => false,
475 :     exports = SymbolMap.empty }
476 : blume 587 | newTraversal (notify, storeBFC, g as GG.GROUP grec) = let
477 :     val { exports, ... } = grec
478 : blume 652 val um = Memoize.memoize (fn () => Indegree.indegrees g)
479 :     fun getUrgency i = getOpt (SmlInfoMap.find (um (), i), 0)
480 :     (* generate the traversal -- lazily *)
481 :     val impexpth =
482 :     Memoize.memoize
483 :     (fn () =>
484 :     #impexp
485 :     (mkTraversal (notify, storeBFC, getUrgency)))
486 : blume 801
487 :     fun many (gp, iel) = let
488 : blume 587 val eo_cl =
489 : blume 652 map (fn x => Concur.fork (fn () => impexpth () gp x))
490 : blume 801 iel
491 : blume 587 val eo = foldl (layer'wait 0) (SOME emptyEnv) eo_cl
492 :     in
493 :     case eo of
494 :     NONE => (Servers.reset false; NONE)
495 :     | SOME e => SOME (#envs e ())
496 :     end handle Abort => (Servers.reset false; NONE)
497 : blume 801
498 :     fun group gp = many (gp, SymbolMap.listItems exports)
499 :    
500 :     fun allgroups gp = let
501 :     fun addgroup ((_, th, _), gl) = th () :: gl
502 :     fun collect ([], _, l) = l
503 :     | collect (GG.ERRORGROUP :: gl, done, l) =
504 :     collect (gl, done, l)
505 :     | collect (GG.GROUP g :: gl, done, l) =
506 :     if SrcPathSet.member (done, #grouppath g) then
507 :     collect (gl, done, l)
508 :     else
509 :     collect (foldl addgroup gl (#sublibs g),
510 :     SrcPathSet.add (done, #grouppath g),
511 :     SymbolMap.foldl (op ::) l (#exports g))
512 :     val l = collect ([g], SrcPathSet.empty, [])
513 :     in
514 :     isSome (many (gp, l))
515 :     end
516 :    
517 : blume 587 fun mkExport ie gp =
518 : blume 652 case impexpth () gp ie handle Abort => NONE of
519 : blume 587 NONE => (Servers.reset false; NONE)
520 :     | SOME e => SOME (#envs e ())
521 : blume 399 in
522 : blume 587 { group = group,
523 : blume 801 allgroups = allgroups,
524 : blume 587 exports = SymbolMap.map mkExport exports }
525 :     end
526 : blume 398
527 : blume 400 fun newSbnodeTraversal () = let
528 : blume 537 val { sbnode, ... } =
529 :     mkTraversal (fn _ => fn _ => (), fn _ => (), fn _ => 0)
530 : blume 771 fun sbn_trav n gp = let
531 :     val r = sbnode gp n handle Abort => NONE
532 : blume 461 in
533 :     if isSome r then () else Servers.reset false;
534 :     r
535 :     end
536 : blume 398 in
537 : blume 461 sbn_trav
538 : blume 398 end
539 :    
540 : blume 537 fun evictStale () =
541 :     globalstate :=
542 :     SmlInfoMap.filteri (SmlInfo.isKnown o #1) (!globalstate)
543 : blume 400
544 : blume 403 fun evictAll () = globalstate := SmlInfoMap.empty
545 : blume 402
546 : blume 403 fun getII i = memo2ii (valOf (SmlInfoMap.find (!globalstate, i)))
547 : blume 398 end
548 :     end

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