1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
|
{- ------------------------------------------------------------------------
(c) The GHC Team, 1992-2012
DeriveConstants is a program that extracts information from the C
declarations in the header files (primarily struct field offsets)
and generates various files, such as a header file that can be #included
into non-C source containing this information.
We want to get information about code generated by the C compiler,
such as the sizes of types, and offsets of struct fields. We need
this because the layout of certain runtime objects is defined in C
headers (e.g. includes/rts/storage/Closures.h), but we need access to
the layout of these structures from a Haskell program (GHC).
One way to do this is to compile and run a C program that includes the
header files and prints out the sizes and offsets. However, when we
are cross-compiling, we can't run a C program compiled for the target
platform.
So, this program works as follows: we generate a C program that when
compiled to an object file, has the information we need encoded as
symbol sizes. This means that we can extract the information without
needing to run the program, by inspecting the object file using 'nm'.
------------------------------------------------------------------------ -}
import Control.Monad (when, unless)
import Data.Bits (shiftL)
import Data.Char (toLower)
import Data.List (stripPrefix, intercalate)
import Data.Map (Map)
import qualified Data.Map as Map
import Data.Maybe (catMaybes, mapMaybe, fromMaybe)
import Numeric (readHex)
import System.Environment (getArgs)
import System.Exit (ExitCode(ExitSuccess), exitFailure)
import System.FilePath ((</>))
import System.IO (stderr, hPutStrLn)
import System.Process (showCommandForUser, readProcess, rawSystem)
main :: IO ()
main = do opts <- parseArgs
let getOption descr opt = case opt opts of
Just x -> return x
Nothing -> die ("No " ++ descr ++ " given")
mode <- getOption "mode" o_mode
fn <- getOption "output filename" o_outputFilename
os <- getOption "target os" o_targetOS
let haskellWanteds = [ what | (wh, what) <- wanteds os
, wh `elem` [Haskell, Both] ]
case mode of
Gen_Haskell_Type -> writeHaskellType fn haskellWanteds
Gen_Haskell_Wrappers -> writeHaskellWrappers fn haskellWanteds
Gen_Haskell_Exports -> writeHaskellExports fn haskellWanteds
Gen_Computed cm ->
do tmpdir <- getOption "tmpdir" o_tmpdir
gccProg <- getOption "gcc program" o_gccProg
nmProg <- getOption "nm program" o_nmProg
let verbose = o_verbose opts
gccFlags = o_gccFlags opts
rs <- getWanted verbose os tmpdir gccProg gccFlags nmProg
(o_objdumpProg opts)
let haskellRs = [ what
| (wh, what) <- rs
, wh `elem` [Haskell, Both] ]
cRs = [ what
| (wh, what) <- rs
, wh `elem` [C, Both] ]
case cm of
ComputeHaskell -> writeHaskellValue fn haskellRs
ComputeHeader -> writeHeader fn cRs
data Options = Options {
o_verbose :: Bool,
o_mode :: Maybe Mode,
o_tmpdir :: Maybe FilePath,
o_outputFilename :: Maybe FilePath,
o_gccProg :: Maybe FilePath,
o_gccFlags :: [String],
o_nmProg :: Maybe FilePath,
o_objdumpProg :: Maybe FilePath,
o_targetOS :: Maybe String
}
parseArgs :: IO Options
parseArgs = do args <- getArgs
opts <- f emptyOptions args
return (opts {o_gccFlags = reverse (o_gccFlags opts)})
where emptyOptions = Options {
o_verbose = False,
o_mode = Nothing,
o_tmpdir = Nothing,
o_outputFilename = Nothing,
o_gccProg = Nothing,
o_gccFlags = [],
o_nmProg = Nothing,
o_objdumpProg = Nothing,
o_targetOS = Nothing
}
f opts [] = return opts
f opts ("-v" : args')
= f (opts {o_verbose = True}) args'
f opts ("--gen-haskell-type" : args')
= f (opts {o_mode = Just Gen_Haskell_Type}) args'
f opts ("--gen-haskell-value" : args')
= f (opts {o_mode = Just (Gen_Computed ComputeHaskell)}) args'
f opts ("--gen-haskell-wrappers" : args')
= f (opts {o_mode = Just Gen_Haskell_Wrappers}) args'
f opts ("--gen-haskell-exports" : args')
= f (opts {o_mode = Just Gen_Haskell_Exports}) args'
f opts ("--gen-header" : args')
= f (opts {o_mode = Just (Gen_Computed ComputeHeader)}) args'
f opts ("--tmpdir" : dir : args')
= f (opts {o_tmpdir = Just dir}) args'
f opts ("-o" : fn : args')
= f (opts {o_outputFilename = Just fn}) args'
f opts ("--gcc-program" : prog : args')
= f (opts {o_gccProg = Just prog}) args'
f opts ("--gcc-flag" : flag : args')
= f (opts {o_gccFlags = flag : o_gccFlags opts}) args'
f opts ("--nm-program" : prog : args')
= f (opts {o_nmProg = Just prog}) args'
f opts ("--objdump-program" : prog : args')
= f (opts {o_objdumpProg = Just prog}) args'
f opts ("--target-os" : os : args')
= f (opts {o_targetOS = Just os}) args'
f _ (flag : _) = die ("Unrecognised flag: " ++ show flag)
data Mode = Gen_Haskell_Type
| Gen_Haskell_Wrappers
| Gen_Haskell_Exports
| Gen_Computed ComputeMode
data ComputeMode = ComputeHaskell | ComputeHeader
type Wanteds = [(Where, What Fst)]
type Results = [(Where, What Snd)]
type Name = String
newtype CExpr = CExpr String
newtype CPPExpr = CPPExpr String
data What f = GetFieldType Name (f CExpr Integer)
| GetClosureSize Name (f CExpr Integer)
| GetWord Name (f CExpr Integer)
| GetInt Name (f CExpr Integer)
| GetNatural Name (f CExpr Integer)
| GetBool Name (f CPPExpr Bool)
| StructFieldMacro Name
| ClosureFieldMacro Name
| ClosurePayloadMacro Name
| FieldTypeGcptrMacro Name
data Fst a b = Fst a
data Snd a b = Snd b
data Where = C | Haskell | Both
deriving Eq
constantInt :: Where -> Name -> String -> Wanteds
constantInt w name expr = [(w, GetInt name (Fst (CExpr expr)))]
constantWord :: Where -> Name -> String -> Wanteds
constantWord w name expr = [(w, GetWord name (Fst (CExpr expr)))]
constantNatural :: Where -> Name -> String -> Wanteds
constantNatural w name expr = [(w, GetNatural name (Fst (CExpr expr)))]
constantBool :: Where -> Name -> String -> Wanteds
constantBool w name expr = [(w, GetBool name (Fst (CPPExpr expr)))]
fieldOffset :: Where -> String -> String -> Wanteds
fieldOffset w theType theField = fieldOffset_ w nameBase theType theField
where nameBase = theType ++ "_" ++ theField
fieldOffset_ :: Where -> Name -> String -> String -> Wanteds
fieldOffset_ w nameBase theType theField = [(w, GetWord name (Fst (CExpr expr)))]
where name = "OFFSET_" ++ nameBase
expr = "offsetof(" ++ theType ++ ", " ++ theField ++ ")"
-- FieldType is for defining REP_x to be b32 etc
-- These are both the C-- types used in a load
-- e.g. b32[addr]
-- and the names of the CmmTypes in the compiler
-- b32 :: CmmType
fieldType' :: Where -> String -> String -> Wanteds
fieldType' w theType theField
= fieldType_' w nameBase theType theField
where nameBase = theType ++ "_" ++ theField
fieldType_' :: Where -> Name -> String -> String -> Wanteds
fieldType_' w nameBase theType theField
= [(w, GetFieldType name (Fst (CExpr expr)))]
where name = "REP_" ++ nameBase
expr = "FIELD_SIZE(" ++ theType ++ ", " ++ theField ++ ")"
structField :: Where -> String -> String -> Wanteds
structField = structFieldHelper C
structFieldH :: Where -> String -> String -> Wanteds
structFieldH w = structFieldHelper w w
structField_ :: Where -> Name -> String -> String -> Wanteds
structField_ w nameBase theType theField
= fieldOffset_ w nameBase theType theField
++ fieldType_' C nameBase theType theField
++ structFieldMacro nameBase
structFieldMacro :: Name -> Wanteds
structFieldMacro nameBase = [(C, StructFieldMacro nameBase)]
-- Outputs the byte offset and MachRep for a field
structFieldHelper :: Where -> Where -> String -> String -> Wanteds
structFieldHelper wFT w theType theField = fieldOffset w theType theField
++ fieldType' wFT theType theField
++ structFieldMacro nameBase
where nameBase = theType ++ "_" ++ theField
closureFieldMacro :: Name -> Wanteds
closureFieldMacro nameBase = [(C, ClosureFieldMacro nameBase)]
closurePayload :: Where -> String -> String -> Wanteds
closurePayload w theType theField
= closureFieldOffset_ w nameBase theType theField
++ closurePayloadMacro nameBase
where nameBase = theType ++ "_" ++ theField
closurePayloadMacro :: Name -> Wanteds
closurePayloadMacro nameBase = [(C, ClosurePayloadMacro nameBase)]
-- Byte offset and MachRep for a closure field, minus the header
closureField_ :: Where -> Name -> String -> String -> Wanteds
closureField_ w nameBase theType theField
= closureFieldOffset_ w nameBase theType theField
++ fieldType_' C nameBase theType theField
++ closureFieldMacro nameBase
closureField :: Where -> String -> String -> Wanteds
closureField w theType theField = closureField_ w nameBase theType theField
where nameBase = theType ++ "_" ++ theField
closureFieldOffset_ :: Where -> Name -> String -> String -> Wanteds
closureFieldOffset_ w nameBase theType theField
= defOffset w nameBase (CExpr ("offsetof(" ++ theType ++ ", " ++ theField ++ ") - TYPE_SIZE(StgHeader)"))
-- Size of a closure type, minus the header, named SIZEOF_<type>_NoHdr
-- Also, we #define SIZEOF_<type> to be the size of the whole closure for .cmm.
closureSize :: Where -> String -> Wanteds
closureSize w theType = defSize w (theType ++ "_NoHdr") (CExpr expr)
++ defClosureSize C theType (CExpr expr)
where expr = "TYPE_SIZE(" ++ theType ++ ") - TYPE_SIZE(StgHeader)"
-- Byte offset and MachRep for a closure field, minus the header
closureFieldGcptr :: Where -> String -> String -> Wanteds
closureFieldGcptr w theType theField
= closureFieldOffset_ w nameBase theType theField
++ fieldTypeGcptr nameBase
++ closureFieldMacro nameBase
where nameBase = theType ++ "_" ++ theField
fieldTypeGcptr :: Name -> Wanteds
fieldTypeGcptr nameBase = [(C, FieldTypeGcptrMacro nameBase)]
closureFieldOffset :: Where -> String -> String -> Wanteds
closureFieldOffset w theType theField
= defOffset w nameBase (CExpr expr)
where nameBase = theType ++ "_" ++ theField
expr = "offsetof(" ++ theType ++ ", " ++ theField ++ ") - TYPE_SIZE(StgHeader)"
thunkSize :: Where -> String -> Wanteds
thunkSize w theType
= defSize w (theType ++ "_NoThunkHdr") (CExpr expr)
++ closureSize w theType
where expr = "TYPE_SIZE(" ++ theType ++ ") - TYPE_SIZE(StgThunkHeader)"
defIntOffset :: Where -> Name -> String -> Wanteds
defIntOffset w nameBase cExpr = [(w, GetInt ("OFFSET_" ++ nameBase) (Fst (CExpr cExpr)))]
defOffset :: Where -> Name -> CExpr -> Wanteds
defOffset w nameBase cExpr = [(w, GetWord ("OFFSET_" ++ nameBase) (Fst cExpr))]
structSize :: Where -> String -> Wanteds
structSize w theType = defSize w theType (CExpr ("TYPE_SIZE(" ++ theType ++ ")"))
defSize :: Where -> Name -> CExpr -> Wanteds
defSize w nameBase cExpr = [(w, GetWord ("SIZEOF_" ++ nameBase) (Fst cExpr))]
defClosureSize :: Where -> Name -> CExpr -> Wanteds
defClosureSize w nameBase cExpr = [(w, GetClosureSize ("SIZEOF_" ++ nameBase) (Fst cExpr))]
haskellise :: Name -> Name
haskellise (c : cs) = toLower c : cs
haskellise "" = ""
wanteds :: String -> Wanteds
wanteds os = concat
[-- Control group constant for integrity check; this
-- round-tripped constant is used for testing that
-- derivedConstant works as expected
constantWord Both "CONTROL_GROUP_CONST_291" "0x123"
-- Closure header sizes.
,constantWord Both "STD_HDR_SIZE"
-- grrr.. PROFILING is on so we need to
-- subtract sizeofW(StgProfHeader)
"sizeofW(StgHeader) - sizeofW(StgProfHeader)"
,constantWord Both "PROF_HDR_SIZE" "sizeofW(StgProfHeader)"
-- Stack flags for C--
,constantWord C "STACK_DIRTY" "STACK_DIRTY"
-- Size of a storage manager block (in bytes).
,constantWord Both "BLOCK_SIZE" "BLOCK_SIZE"
,constantWord C "MBLOCK_SIZE" "MBLOCK_SIZE"
-- blocks that fit in an MBlock, leaving space for the block
-- descriptors
,constantWord Both "BLOCKS_PER_MBLOCK" "BLOCKS_PER_MBLOCK"
-- could be derived, but better to save doing the calculation twice
,constantWord Both "TICKY_BIN_COUNT" "TICKY_BIN_COUNT"
-- number of bins for histograms used in ticky code
,fieldOffset Both "StgRegTable" "rR1"
,fieldOffset Both "StgRegTable" "rR2"
,fieldOffset Both "StgRegTable" "rR3"
,fieldOffset Both "StgRegTable" "rR4"
,fieldOffset Both "StgRegTable" "rR5"
,fieldOffset Both "StgRegTable" "rR6"
,fieldOffset Both "StgRegTable" "rR7"
,fieldOffset Both "StgRegTable" "rR8"
,fieldOffset Both "StgRegTable" "rR9"
,fieldOffset Both "StgRegTable" "rR10"
,fieldOffset Both "StgRegTable" "rF1"
,fieldOffset Both "StgRegTable" "rF2"
,fieldOffset Both "StgRegTable" "rF3"
,fieldOffset Both "StgRegTable" "rF4"
,fieldOffset Both "StgRegTable" "rF5"
,fieldOffset Both "StgRegTable" "rF6"
,fieldOffset Both "StgRegTable" "rD1"
,fieldOffset Both "StgRegTable" "rD2"
,fieldOffset Both "StgRegTable" "rD3"
,fieldOffset Both "StgRegTable" "rD4"
,fieldOffset Both "StgRegTable" "rD5"
,fieldOffset Both "StgRegTable" "rD6"
,fieldOffset Both "StgRegTable" "rXMM1"
,fieldOffset Both "StgRegTable" "rXMM2"
,fieldOffset Both "StgRegTable" "rXMM3"
,fieldOffset Both "StgRegTable" "rXMM4"
,fieldOffset Both "StgRegTable" "rXMM5"
,fieldOffset Both "StgRegTable" "rXMM6"
,fieldOffset Both "StgRegTable" "rYMM1"
,fieldOffset Both "StgRegTable" "rYMM2"
,fieldOffset Both "StgRegTable" "rYMM3"
,fieldOffset Both "StgRegTable" "rYMM4"
,fieldOffset Both "StgRegTable" "rYMM5"
,fieldOffset Both "StgRegTable" "rYMM6"
,fieldOffset Both "StgRegTable" "rZMM1"
,fieldOffset Both "StgRegTable" "rZMM2"
,fieldOffset Both "StgRegTable" "rZMM3"
,fieldOffset Both "StgRegTable" "rZMM4"
,fieldOffset Both "StgRegTable" "rZMM5"
,fieldOffset Both "StgRegTable" "rZMM6"
,fieldOffset Both "StgRegTable" "rL1"
,fieldOffset Both "StgRegTable" "rSp"
,fieldOffset Both "StgRegTable" "rSpLim"
,fieldOffset Both "StgRegTable" "rHp"
,fieldOffset Both "StgRegTable" "rHpLim"
,fieldOffset Both "StgRegTable" "rCCCS"
,fieldOffset Both "StgRegTable" "rCurrentTSO"
,fieldOffset Both "StgRegTable" "rCurrentNursery"
,fieldOffset Both "StgRegTable" "rHpAlloc"
,structField C "StgRegTable" "rRet"
,structField C "StgRegTable" "rNursery"
,defIntOffset Both "stgEagerBlackholeInfo"
"FUN_OFFSET(stgEagerBlackholeInfo)"
,defIntOffset Both "stgGCEnter1" "FUN_OFFSET(stgGCEnter1)"
,defIntOffset Both "stgGCFun" "FUN_OFFSET(stgGCFun)"
,fieldOffset Both "Capability" "r"
,fieldOffset C "Capability" "lock"
,structField C "Capability" "no"
,structField C "Capability" "mut_lists"
,structField C "Capability" "context_switch"
,structField C "Capability" "interrupt"
,structField C "Capability" "sparks"
,structField C "Capability" "total_allocated"
,structField C "Capability" "weak_ptr_list_hd"
,structField C "Capability" "weak_ptr_list_tl"
,structField Both "bdescr" "start"
,structField Both "bdescr" "free"
,structField Both "bdescr" "blocks"
,structField C "bdescr" "gen_no"
,structField C "bdescr" "link"
,structField Both "bdescr" "flags"
,structSize C "generation"
,structField C "generation" "n_new_large_words"
,structField C "generation" "weak_ptr_list"
,structSize Both "CostCentreStack"
,structField C "CostCentreStack" "ccsID"
,structFieldH Both "CostCentreStack" "mem_alloc"
,structFieldH Both "CostCentreStack" "scc_count"
,structField C "CostCentreStack" "prevStack"
,structField C "CostCentre" "ccID"
,structField C "CostCentre" "link"
,structField C "StgHeader" "info"
,structField_ Both "StgHeader_ccs" "StgHeader" "prof.ccs"
,structField_ Both "StgHeader_ldvw" "StgHeader" "prof.hp.ldvw"
,structSize Both "StgSMPThunkHeader"
,closurePayload C "StgClosure" "payload"
,structFieldH Both "StgEntCounter" "allocs"
,structFieldH Both "StgEntCounter" "allocd"
,structField Both "StgEntCounter" "registeredp"
,structField Both "StgEntCounter" "link"
,structField Both "StgEntCounter" "entry_count"
,closureSize Both "StgUpdateFrame"
,closureSize C "StgCatchFrame"
,closureSize C "StgStopFrame"
,closureSize Both "StgMutArrPtrs"
,closureField Both "StgMutArrPtrs" "ptrs"
,closureField Both "StgMutArrPtrs" "size"
,closureSize Both "StgSmallMutArrPtrs"
,closureField Both "StgSmallMutArrPtrs" "ptrs"
,closureSize Both "StgArrBytes"
,closureField Both "StgArrBytes" "bytes"
,closurePayload C "StgArrBytes" "payload"
,closureField C "StgTSO" "_link"
,closureField C "StgTSO" "global_link"
,closureField C "StgTSO" "what_next"
,closureField C "StgTSO" "why_blocked"
,closureField C "StgTSO" "block_info"
,closureField C "StgTSO" "blocked_exceptions"
,closureField C "StgTSO" "id"
,closureField C "StgTSO" "cap"
,closureField C "StgTSO" "saved_errno"
,closureField C "StgTSO" "trec"
,closureField C "StgTSO" "flags"
,closureField C "StgTSO" "dirty"
,closureField C "StgTSO" "bq"
,closureField Both "StgTSO" "alloc_limit"
,closureField_ Both "StgTSO_cccs" "StgTSO" "prof.cccs"
,closureField Both "StgTSO" "stackobj"
,closureField Both "StgStack" "sp"
,closureFieldOffset Both "StgStack" "stack"
,closureField C "StgStack" "stack_size"
,closureField C "StgStack" "dirty"
,structSize C "StgTSOProfInfo"
,closureField Both "StgUpdateFrame" "updatee"
,closureField C "StgCatchFrame" "handler"
,closureField C "StgCatchFrame" "exceptions_blocked"
,closureSize C "StgPAP"
,closureField C "StgPAP" "n_args"
,closureFieldGcptr C "StgPAP" "fun"
,closureField C "StgPAP" "arity"
,closurePayload C "StgPAP" "payload"
,thunkSize C "StgAP"
,closureField C "StgAP" "n_args"
,closureFieldGcptr C "StgAP" "fun"
,closurePayload C "StgAP" "payload"
,thunkSize C "StgAP_STACK"
,closureField C "StgAP_STACK" "size"
,closureFieldGcptr C "StgAP_STACK" "fun"
,closurePayload C "StgAP_STACK" "payload"
,thunkSize C "StgSelector"
,closureFieldGcptr C "StgInd" "indirectee"
,closureSize C "StgMutVar"
,closureField C "StgMutVar" "var"
,closureSize C "StgAtomicallyFrame"
,closureField C "StgAtomicallyFrame" "code"
,closureField C "StgAtomicallyFrame" "result"
,closureField C "StgTRecHeader" "enclosing_trec"
,closureSize C "StgCatchSTMFrame"
,closureField C "StgCatchSTMFrame" "handler"
,closureField C "StgCatchSTMFrame" "code"
,closureSize C "StgCatchRetryFrame"
,closureField C "StgCatchRetryFrame" "running_alt_code"
,closureField C "StgCatchRetryFrame" "first_code"
,closureField C "StgCatchRetryFrame" "alt_code"
,closureField C "StgTVarWatchQueue" "closure"
,closureField C "StgTVarWatchQueue" "next_queue_entry"
,closureField C "StgTVarWatchQueue" "prev_queue_entry"
,closureSize C "StgTVar"
,closureField C "StgTVar" "current_value"
,closureField C "StgTVar" "first_watch_queue_entry"
,closureField C "StgTVar" "num_updates"
,closureSize C "StgWeak"
,closureField C "StgWeak" "link"
,closureField C "StgWeak" "key"
,closureField C "StgWeak" "value"
,closureField C "StgWeak" "finalizer"
,closureField C "StgWeak" "cfinalizers"
,closureSize C "StgCFinalizerList"
,closureField C "StgCFinalizerList" "link"
,closureField C "StgCFinalizerList" "fptr"
,closureField C "StgCFinalizerList" "ptr"
,closureField C "StgCFinalizerList" "eptr"
,closureField C "StgCFinalizerList" "flag"
,closureSize C "StgMVar"
,closureField C "StgMVar" "head"
,closureField C "StgMVar" "tail"
,closureField C "StgMVar" "value"
,closureSize C "StgMVarTSOQueue"
,closureField C "StgMVarTSOQueue" "link"
,closureField C "StgMVarTSOQueue" "tso"
,closureSize C "StgBCO"
,closureField C "StgBCO" "instrs"
,closureField C "StgBCO" "literals"
,closureField C "StgBCO" "ptrs"
,closureField C "StgBCO" "arity"
,closureField C "StgBCO" "size"
,closurePayload C "StgBCO" "bitmap"
,closureSize C "StgStableName"
,closureField C "StgStableName" "sn"
,closureSize C "StgBlockingQueue"
,closureField C "StgBlockingQueue" "bh"
,closureField C "StgBlockingQueue" "owner"
,closureField C "StgBlockingQueue" "queue"
,closureField C "StgBlockingQueue" "link"
,closureSize C "MessageBlackHole"
,closureField C "MessageBlackHole" "link"
,closureField C "MessageBlackHole" "tso"
,closureField C "MessageBlackHole" "bh"
,closureSize C "StgCompactNFData"
,closureField C "StgCompactNFData" "totalW"
,closureField C "StgCompactNFData" "autoBlockW"
,closureField C "StgCompactNFData" "nursery"
,closureField C "StgCompactNFData" "last"
,closureField C "StgCompactNFData" "hp"
,closureField C "StgCompactNFData" "hpLim"
,closureField C "StgCompactNFData" "hash"
,closureField C "StgCompactNFData" "result"
,structSize C "StgCompactNFDataBlock"
,structField C "StgCompactNFDataBlock" "self"
,structField C "StgCompactNFDataBlock" "owner"
,structField C "StgCompactNFDataBlock" "next"
,structField_ C "RtsFlags_ProfFlags_showCCSOnException"
"RTS_FLAGS" "ProfFlags.showCCSOnException"
,structField_ C "RtsFlags_DebugFlags_apply"
"RTS_FLAGS" "DebugFlags.apply"
,structField_ C "RtsFlags_DebugFlags_sanity"
"RTS_FLAGS" "DebugFlags.sanity"
,structField_ C "RtsFlags_DebugFlags_weak"
"RTS_FLAGS" "DebugFlags.weak"
,structField_ C "RtsFlags_GcFlags_initialStkSize"
"RTS_FLAGS" "GcFlags.initialStkSize"
,structField_ C "RtsFlags_MiscFlags_tickInterval"
"RTS_FLAGS" "MiscFlags.tickInterval"
,structSize C "StgFunInfoExtraFwd"
,structField C "StgFunInfoExtraFwd" "slow_apply"
,structField C "StgFunInfoExtraFwd" "fun_type"
,structFieldH Both "StgFunInfoExtraFwd" "arity"
,structField_ C "StgFunInfoExtraFwd_bitmap" "StgFunInfoExtraFwd" "b.bitmap"
,structSize Both "StgFunInfoExtraRev"
,structField C "StgFunInfoExtraRev" "slow_apply_offset"
,structField C "StgFunInfoExtraRev" "fun_type"
,structFieldH Both "StgFunInfoExtraRev" "arity"
,structField_ C "StgFunInfoExtraRev_bitmap" "StgFunInfoExtraRev" "b.bitmap"
,structField_ C "StgFunInfoExtraRev_bitmap_offset" "StgFunInfoExtraRev" "b.bitmap_offset"
,structField C "StgLargeBitmap" "size"
,fieldOffset C "StgLargeBitmap" "bitmap"
,structSize C "snEntry"
,structField C "snEntry" "sn_obj"
,structField C "snEntry" "addr"
,structSize C "spEntry"
,structField C "spEntry" "addr"
-- Note that this conditional part only affects the C headers.
-- That's important, as it means we get the same PlatformConstants
-- type on all platforms.
,if os == "mingw32"
then concat [structSize C "StgAsyncIOResult"
,structField C "StgAsyncIOResult" "reqID"
,structField C "StgAsyncIOResult" "len"
,structField C "StgAsyncIOResult" "errCode"]
else []
-- pre-compiled thunk types
,constantWord Haskell "MAX_SPEC_SELECTEE_SIZE" "MAX_SPEC_SELECTEE_SIZE"
,constantWord Haskell "MAX_SPEC_AP_SIZE" "MAX_SPEC_AP_SIZE"
-- closure sizes: these do NOT include the header (see below for
-- header sizes)
,constantWord Haskell "MIN_PAYLOAD_SIZE" "MIN_PAYLOAD_SIZE"
,constantInt Haskell "MIN_INTLIKE" "MIN_INTLIKE"
,constantWord Haskell "MAX_INTLIKE" "MAX_INTLIKE"
,constantWord Haskell "MIN_CHARLIKE" "MIN_CHARLIKE"
,constantWord Haskell "MAX_CHARLIKE" "MAX_CHARLIKE"
,constantWord Haskell "MUT_ARR_PTRS_CARD_BITS" "MUT_ARR_PTRS_CARD_BITS"
-- A section of code-generator-related MAGIC CONSTANTS.
,constantWord Haskell "MAX_Vanilla_REG" "MAX_VANILLA_REG"
,constantWord Haskell "MAX_Float_REG" "MAX_FLOAT_REG"
,constantWord Haskell "MAX_Double_REG" "MAX_DOUBLE_REG"
,constantWord Haskell "MAX_Long_REG" "MAX_LONG_REG"
,constantWord Haskell "MAX_XMM_REG" "MAX_XMM_REG"
,constantWord Haskell "MAX_Real_Vanilla_REG" "MAX_REAL_VANILLA_REG"
,constantWord Haskell "MAX_Real_Float_REG" "MAX_REAL_FLOAT_REG"
,constantWord Haskell "MAX_Real_Double_REG" "MAX_REAL_DOUBLE_REG"
,constantWord Haskell "MAX_Real_XMM_REG" "MAX_REAL_XMM_REG"
,constantWord Haskell "MAX_Real_Long_REG" "MAX_REAL_LONG_REG"
-- This tells the native code generator the size of the spill
-- area it has available.
,constantWord Haskell "RESERVED_C_STACK_BYTES" "RESERVED_C_STACK_BYTES"
-- The amount of (Haskell) stack to leave free for saving
-- registers when returning to the scheduler.
,constantWord Haskell "RESERVED_STACK_WORDS" "RESERVED_STACK_WORDS"
-- Continuations that need more than this amount of stack
-- should do their own stack check (see bug #1466).
,constantWord Haskell "AP_STACK_SPLIM" "AP_STACK_SPLIM"
-- Size of a word, in bytes
,constantWord Haskell "WORD_SIZE" "SIZEOF_HSWORD"
-- Size of a C int, in bytes. May be smaller than wORD_SIZE.
,constantWord Haskell "CINT_SIZE" "SIZEOF_INT"
,constantWord Haskell "CLONG_SIZE" "SIZEOF_LONG"
,constantWord Haskell "CLONG_LONG_SIZE" "SIZEOF_LONG_LONG"
-- Number of bits to shift a bitfield left by in an info table.
,constantWord Haskell "BITMAP_BITS_SHIFT" "BITMAP_BITS_SHIFT"
-- Amount of pointer bits used for semi-tagging constructor closures
,constantWord Haskell "TAG_BITS" "TAG_BITS"
,constantBool Haskell "DYNAMIC_BY_DEFAULT" "defined(DYNAMIC_BY_DEFAULT)"
,constantWord Haskell "LDV_SHIFT" "LDV_SHIFT"
,constantNatural Haskell "ILDV_CREATE_MASK" "LDV_CREATE_MASK"
,constantNatural Haskell "ILDV_STATE_CREATE" "LDV_STATE_CREATE"
,constantNatural Haskell "ILDV_STATE_USE" "LDV_STATE_USE"
]
getWanted :: Bool -> String -> FilePath -> FilePath -> [String] -> FilePath -> Maybe FilePath
-> IO Results
getWanted verbose os tmpdir gccProgram gccFlags nmProgram mobjdumpProgram
= do let cStuff = unlines (headers ++ concatMap (doWanted . snd) (wanteds os))
cFile = tmpdir </> "tmp.c"
oFile = tmpdir </> "tmp.o"
writeFile cFile cStuff
execute verbose gccProgram (gccFlags ++ ["-c", cFile, "-o", oFile])
xs <- case os of
"openbsd" -> readProcess objdumpProgam ["--syms", oFile] ""
"aix" -> readProcess objdumpProgam ["--syms", oFile] ""
_ -> readProcess nmProgram ["-P", oFile] ""
let ls = lines xs
m = Map.fromList $ case os of
"aix" -> parseAixObjdump ls
_ -> mapMaybe parseNmLine ls
case Map.lookup "CONTROL_GROUP_CONST_291" m of
Just 292 -> return () -- OK
Nothing -> die "CONTROL_GROUP_CONST_291 missing!"
Just 0x292 -> die $ "broken 'nm' detected, see https://gitlab.haskell.org/ghc/ghc/issues/11744.\n"
++ "\n"
++ "Workaround: You may want to pass\n"
++ " --with-nm=$(xcrun --find nm-classic)\n"
++ "to 'configure'.\n"
Just x -> die ("unexpected value round-tripped for CONTROL_GROUP_CONST_291: " ++ show x)
mapM (lookupResult m) (wanteds os)
where headers = ["#define IN_STG_CODE 0",
"",
"/*",
" * We need offsets of profiled things...",
" * better be careful that this doesn't",
" * affect the offsets of anything else.",
" */",
"",
"#define PROFILING",
"#define THREADED_RTS",
"",
"#include \"PosixSource.h\"",
"#include \"Rts.h\"",
"#include \"StableName.h\"",
"#include \"Capability.h\"",
"",
"#include <inttypes.h>",
"#include <stddef.h>",
"#include <stdio.h>",
"#include <string.h>",
"",
"#define FIELD_SIZE(s_type, field) ((size_t)sizeof(((s_type*)0)->field))",
"#define TYPE_SIZE(type) (sizeof(type))",
"#define FUN_OFFSET(sym) (offsetof(Capability,f.sym) - offsetof(Capability,r))",
"",
"#pragma GCC poison sizeof"
]
objdumpProgam = fromMaybe (error "no objdump program given") mobjdumpProgram
prefix = "derivedConstant"
mkFullName name = prefix ++ name
-- We add 1 to the value, as some platforms will make a symbol
-- of size 1 when for
-- char foo[0];
-- We then subtract 1 again when parsing.
doWanted (GetFieldType name (Fst (CExpr cExpr)))
= ["char " ++ mkFullName name ++ "[1 + " ++ cExpr ++ "];"]
doWanted (GetClosureSize name (Fst (CExpr cExpr)))
= ["char " ++ mkFullName name ++ "[1 + " ++ cExpr ++ "];"]
doWanted (GetWord name (Fst (CExpr cExpr)))
= ["char " ++ mkFullName name ++ "[1 + " ++ cExpr ++ "];"]
doWanted (GetInt name (Fst (CExpr cExpr)))
= ["char " ++ mkFullName name ++ "Mag[1 + ((intptr_t)(" ++ cExpr ++ ") >= 0 ? (" ++ cExpr ++ ") : -(" ++ cExpr ++ "))];",
"char " ++ mkFullName name ++ "Sig[(intptr_t)(" ++ cExpr ++ ") >= 0 ? 3 : 1];"]
doWanted (GetNatural name (Fst (CExpr cExpr)))
= -- These casts fix "right shift count >= width of type"
-- warnings
let cExpr' = "(uint64_t)(size_t)(" ++ cExpr ++ ")"
in ["char " ++ mkFullName name ++ "0[1 + ((" ++ cExpr' ++ ") & 0xFFFF)];",
"char " ++ mkFullName name ++ "1[1 + (((" ++ cExpr' ++ ") >> 16) & 0xFFFF)];",
"char " ++ mkFullName name ++ "2[1 + (((" ++ cExpr' ++ ") >> 32) & 0xFFFF)];",
"char " ++ mkFullName name ++ "3[1 + (((" ++ cExpr' ++ ") >> 48) & 0xFFFF)];"]
doWanted (GetBool name (Fst (CPPExpr cppExpr)))
= ["#if " ++ cppExpr,
"char " ++ mkFullName name ++ "[1];",
"#else",
"char " ++ mkFullName name ++ "[2];",
"#endif"]
doWanted (StructFieldMacro {}) = []
doWanted (ClosureFieldMacro {}) = []
doWanted (ClosurePayloadMacro {}) = []
doWanted (FieldTypeGcptrMacro {}) = []
-- parseNmLine parses "nm -P" output that looks like
-- "derivedConstantMAX_Vanilla_REG C 0000000b 0000000b" (GNU nm)
-- "_derivedConstantMAX_Vanilla_REG C b 0" (Mac OS X)
-- "_derivedConstantMAX_Vanilla_REG C 000000b" (MinGW)
-- "derivedConstantMAX_Vanilla_REG D 1 b" (Solaris)
-- and returns ("MAX_Vanilla_REG", 11)
parseNmLine line
= case words line of
('_' : n) : "C" : s : _ -> mkP n s
n : "C" : s : _ -> mkP n s
[n, "D", _, s] -> mkP n s
[s, "O", "*COM*", _, n] -> mkP n s
_ -> Nothing
where mkP r s = case (stripPrefix prefix r, readHex s) of
(Just name, [(size, "")]) -> Just (name, size)
_ -> Nothing
-- On AIX, `nm` isn't able to tell us the symbol size, so we
-- need to use `objdump --syms`. However, unlike on OpenBSD,
-- `objdump --syms` outputs entries spanning two lines, e.g.
--
-- [ 50](sec 3)(fl 0x00)(ty 0)(scl 2) (nx 1) 0x00000318 derivedConstantBLOCK_SIZE
-- AUX val 4097 prmhsh 0 snhsh 0 typ 3 algn 3 clss 5 stb 0 snstb 0
--
parseAixObjdump :: [String] -> [(String,Integer)]
parseAixObjdump = catMaybes . goAix
where
goAix (l1@('[':_):l2@('A':'U':'X':_):ls')
= parseObjDumpEntry l1 l2 : goAix ls'
goAix (_:ls') = goAix ls'
goAix [] = []
parseObjDumpEntry l1 l2
| ["val",n] <- take 2 (tail $ words l2)
, Just sym <- stripPrefix prefix sym0 = Just (sym, read n)
| otherwise = Nothing
where
[sym0, _] = take 2 (reverse $ words l1)
-- If an Int value is larger than 2^28 or smaller
-- than -2^28, then fail.
-- This test is a bit conservative, but if any
-- constants are roughly maxBound or minBound then
-- we probably need them to be Integer rather than
-- Int so that -- cross-compiling between 32bit and
-- 64bit platforms works.
lookupSmall :: Map String Integer -> Name -> IO Integer
lookupSmall m name
= case Map.lookup name m of
Just v
| v > 2^(28 :: Int) ||
v < -(2^(28 :: Int)) ->
die ("Value too large for GetWord: " ++ show v)
| otherwise -> return v
Nothing -> die ("Can't find " ++ show name)
lookupResult :: Map String Integer -> (Where, What Fst)
-> IO (Where, What Snd)
lookupResult m (w, GetWord name _)
= do v <- lookupSmall m name
return (w, GetWord name (Snd (v - 1)))
lookupResult m (w, GetInt name _)
= do mag <- lookupSmall m (name ++ "Mag")
sig <- lookupSmall m (name ++ "Sig")
return (w, GetWord name (Snd ((mag - 1) * (sig - 2))))
lookupResult m (w, GetNatural name _)
= do v0 <- lookupSmall m (name ++ "0")
v1 <- lookupSmall m (name ++ "1")
v2 <- lookupSmall m (name ++ "2")
v3 <- lookupSmall m (name ++ "3")
let v = (v0 - 1)
+ shiftL (v1 - 1) 16
+ shiftL (v2 - 1) 32
+ shiftL (v3 - 1) 48
return (w, GetWord name (Snd v))
lookupResult m (w, GetBool name _)
= do v <- lookupSmall m name
case v of
1 -> return (w, GetBool name (Snd True))
2 -> return (w, GetBool name (Snd False))
_ -> die ("Bad boolean: " ++ show v)
lookupResult m (w, GetFieldType name _)
= do v <- lookupSmall m name
return (w, GetFieldType name (Snd (v - 1)))
lookupResult m (w, GetClosureSize name _)
= do v <- lookupSmall m name
return (w, GetClosureSize name (Snd (v - 1)))
lookupResult _ (w, StructFieldMacro name)
= return (w, StructFieldMacro name)
lookupResult _ (w, ClosureFieldMacro name)
= return (w, ClosureFieldMacro name)
lookupResult _ (w, ClosurePayloadMacro name)
= return (w, ClosurePayloadMacro name)
lookupResult _ (w, FieldTypeGcptrMacro name)
= return (w, FieldTypeGcptrMacro name)
writeHaskellType :: FilePath -> [What Fst] -> IO ()
writeHaskellType fn ws = writeFile fn xs
where xs = unlines [header, body, footer]
header = "data PlatformConstants = PlatformConstants {"
footer = " } deriving Read"
body = intercalate ",\n" (concatMap doWhat ws)
doWhat (GetClosureSize name _) = [" pc_" ++ name ++ " :: Int"]
doWhat (GetFieldType name _) = [" pc_" ++ name ++ " :: Int"]
doWhat (GetWord name _) = [" pc_" ++ name ++ " :: Int"]
doWhat (GetInt name _) = [" pc_" ++ name ++ " :: Int"]
doWhat (GetNatural name _) = [" pc_" ++ name ++ " :: Integer"]
doWhat (GetBool name _) = [" pc_" ++ name ++ " :: Bool"]
doWhat (StructFieldMacro {}) = []
doWhat (ClosureFieldMacro {}) = []
doWhat (ClosurePayloadMacro {}) = []
doWhat (FieldTypeGcptrMacro {}) = []
writeHaskellValue :: FilePath -> [What Snd] -> IO ()
writeHaskellValue fn rs = writeFile fn xs
where xs = unlines [header, body, footer]
header = "PlatformConstants {"
footer = " }"
body = intercalate ",\n" (concatMap doWhat rs)
doWhat (GetClosureSize name (Snd v)) = [" pc_" ++ name ++ " = " ++ show v]
doWhat (GetFieldType name (Snd v)) = [" pc_" ++ name ++ " = " ++ show v]
doWhat (GetWord name (Snd v)) = [" pc_" ++ name ++ " = " ++ show v]
doWhat (GetInt name (Snd v)) = [" pc_" ++ name ++ " = " ++ show v]
doWhat (GetNatural name (Snd v)) = [" pc_" ++ name ++ " = " ++ show v]
doWhat (GetBool name (Snd v)) = [" pc_" ++ name ++ " = " ++ show v]
doWhat (StructFieldMacro {}) = []
doWhat (ClosureFieldMacro {}) = []
doWhat (ClosurePayloadMacro {}) = []
doWhat (FieldTypeGcptrMacro {}) = []
writeHaskellWrappers :: FilePath -> [What Fst] -> IO ()
writeHaskellWrappers fn ws = writeFile fn xs
where xs = unlines body
body = concatMap doWhat ws
doWhat (GetFieldType {}) = []
doWhat (GetClosureSize {}) = []
doWhat (GetWord name _) = [haskellise name ++ " :: DynFlags -> Int",
haskellise name ++ " dflags = pc_" ++ name ++ " (platformConstants dflags)"]
doWhat (GetInt name _) = [haskellise name ++ " :: DynFlags -> Int",
haskellise name ++ " dflags = pc_" ++ name ++ " (platformConstants dflags)"]
doWhat (GetNatural name _) = [haskellise name ++ " :: DynFlags -> Integer",
haskellise name ++ " dflags = pc_" ++ name ++ " (platformConstants dflags)"]
doWhat (GetBool name _) = [haskellise name ++ " :: DynFlags -> Bool",
haskellise name ++ " dflags = pc_" ++ name ++ " (platformConstants dflags)"]
doWhat (StructFieldMacro {}) = []
doWhat (ClosureFieldMacro {}) = []
doWhat (ClosurePayloadMacro {}) = []
doWhat (FieldTypeGcptrMacro {}) = []
writeHaskellExports :: FilePath -> [What Fst] -> IO ()
writeHaskellExports fn ws = writeFile fn xs
where xs = unlines body
body = concatMap doWhat ws
doWhat (GetFieldType {}) = []
doWhat (GetClosureSize {}) = []
doWhat (GetWord name _) = [" " ++ haskellise name ++ ","]
doWhat (GetInt name _) = [" " ++ haskellise name ++ ","]
doWhat (GetNatural name _) = [" " ++ haskellise name ++ ","]
doWhat (GetBool name _) = [" " ++ haskellise name ++ ","]
doWhat (StructFieldMacro {}) = []
doWhat (ClosureFieldMacro {}) = []
doWhat (ClosurePayloadMacro {}) = []
doWhat (FieldTypeGcptrMacro {}) = []
writeHeader :: FilePath -> [What Snd] -> IO ()
writeHeader fn rs = writeFile fn xs
where xs = unlines (headers ++ body)
headers = ["/* This file is created automatically. Do not edit by hand.*/", ""]
body = map doWhat rs
doWhat (GetFieldType name (Snd v)) = "#define " ++ name ++ " b" ++ show (v * 8)
doWhat (GetClosureSize name (Snd v)) = "#define " ++ name ++ " (SIZEOF_StgHeader+" ++ show v ++ ")"
doWhat (GetWord name (Snd v)) = "#define " ++ name ++ " " ++ show v
doWhat (GetInt name (Snd v)) = "#define " ++ name ++ " " ++ show v
doWhat (GetNatural name (Snd v)) = "#define " ++ name ++ " " ++ show v
doWhat (GetBool name (Snd v)) = "#define " ++ name ++ " " ++ show (fromEnum v)
doWhat (StructFieldMacro nameBase) =
"#define " ++ nameBase ++ "(__ptr__) REP_" ++ nameBase ++ "[__ptr__+OFFSET_" ++ nameBase ++ "]"
doWhat (ClosureFieldMacro nameBase) =
"#define " ++ nameBase ++ "(__ptr__) REP_" ++ nameBase ++ "[__ptr__+SIZEOF_StgHeader+OFFSET_" ++ nameBase ++ "]"
doWhat (ClosurePayloadMacro nameBase) =
"#define " ++ nameBase ++ "(__ptr__,__ix__) W_[__ptr__+SIZEOF_StgHeader+OFFSET_" ++ nameBase ++ " + WDS(__ix__)]"
doWhat (FieldTypeGcptrMacro nameBase) =
"#define REP_" ++ nameBase ++ " gcptr"
die :: String -> IO a
die err = do hPutStrLn stderr err
exitFailure
execute :: Bool -> FilePath -> [String] -> IO ()
execute verbose prog args
= do when verbose $ putStrLn $ showCommandForUser prog args
ec <- rawSystem prog args
unless (ec == ExitSuccess) $
die ("Executing " ++ show prog ++ " failed")
|
