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
|
------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- D E B U G --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2010, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
package body Debug is
---------------------------------
-- Summary of Debug Flag Usage --
---------------------------------
-- Debug flags for compiler (GNAT1)
-- da Generate messages tracking semantic analyzer progress
-- db Show encoding of type names for debug output
-- dc List names of units as they are compiled
-- dd Dynamic allocation of tables messages generated
-- de List the entity table
-- df Full tree/source print (includes withed units)
-- dg Print source from tree (generated code only)
-- dh Generate listing showing loading of name table hash chains
-- di Generate messages for visibility linking/delinking
-- dj Suppress "junk null check" for access parameter values
-- dk Generate GNATBUG message on abort, even if previous errors
-- dl Generate unit load trace messages
-- dm Allow VMS features even if not OpenVMS version
-- dn Generate messages for node/list allocation
-- do Print source from tree (original code only)
-- dp Generate messages for parser scope stack push/pops
-- dq No auto-alignment of small records
-- dr Generate parser resynchronization messages
-- ds Print source from tree (including original and generated stuff)
-- dt Print full tree
-- du Uncheck categorization pragmas
-- dv Output trace of overload resolution
-- dw Print trace of semantic scope stack
-- dx Force expansion on, even if no code being generated
-- dy Print tree of package Standard
-- dz Print source of package Standard
-- dA All entities included in representation information output
-- dB Output debug encoding of type names and variants
-- dC Output debugging information on check suppression
-- dD Delete elaboration checks in inner level routines
-- dE Apply elaboration checks to predefined units
-- dF Front end data layout enabled
-- dG Generate all warnings including those normally suppressed
-- dH Hold (kill) call to gigi
-- dI Inhibit internal name numbering in gnatG listing
-- dJ Output debugging trace info for JGNAT (Java VM version of GNAT)
-- dK Kill all error messages
-- dL Output trace information on elaboration checking
-- dM Asssume all variables are modified (no current values)
-- dN No file name information in exception messages
-- dO Output immediate error messages
-- dP Do not check for controlled objects in preelaborable packages
-- dQ
-- dR Bypass check for correct version of s-rpc
-- dS Never convert numbers to machine numbers in Sem_Eval
-- dT Convert to machine numbers only for constant declarations
-- dU Enable garbage collection of unreachable entities
-- dV Enable viewing of all symbols in debugger
-- dW Disable warnings on calls for IN OUT parameters
-- dX Display messages on reads of potentially uninitialized scalars
-- dY Enable configurable run-time mode
-- dZ Generate listing showing the contents of the dispatch tables
-- d.a Force Target_Strict_Alignment mode to True
-- d.b
-- d.c Generate inline concatenation, do not call procedure
-- d.d
-- d.e
-- d.f Inhibit folding of static expressions
-- d.g Enable conversion of raise into goto
-- d.h
-- d.i Ignore Warnings pragmas
-- d.j
-- d.k
-- d.l Use Ada 95 semantics for limited function returns
-- d.m For -gnatl, print full source only for main unit
-- d.n Print source file names
-- d.o
-- d.p
-- d.q
-- d.r Enable OK_To_Reorder_Components in non-variant records
-- d.s Disable expansion of slice move, use memmove
-- d.t Disable static allocation of library level dispatch tables
-- d.u
-- d.v Enable OK_To_Reorder_Components in variant records
-- d.w Do not check for infinite loops
-- d.x No exception handlers
-- d.y
-- d.z
-- d.A
-- d.B
-- d.C Generate concatenation call, do not generate inline code
-- d.D
-- d.E
-- d.F
-- d.G
-- d.H
-- d.I SCIL generation mode
-- d.J Parallel SCIL generation mode
-- d.K
-- d.L
-- d.M
-- d.N
-- d.O Dump internal SCO tables
-- d.P
-- d.Q
-- d.R
-- d.S Force Optimize_Alignment (Space)
-- d.T Force Optimize_Alignment (Time)
-- d.U
-- d.V
-- d.W Print out debugging information for Walk_Library_Items
-- d.X Use Expression_With_Actions
-- d.Y Do not use Expression_With_Actions
-- d.Z
-- d1 Error msgs have node numbers where possible
-- d2 Eliminate error flags in verbose form error messages
-- d3 Dump bad node in Comperr on an abort
-- d4 Inhibit automatic krunch of predefined library unit files
-- d5 Debug output for tree read/write
-- d6 Default access unconstrained to thin pointers
-- d7 Do not output version & file time stamp in -gnatv or -gnatl mode
-- d8 Force opposite endianness in packed stuff
-- d9
-- Debug flags for binder (GNATBIND)
-- da All links (including internal units) listed if there is a cycle
-- db Output information from Better_Choice
-- dc List units as they are chosen
-- dd
-- de Elaboration dependencies including system units
-- df
-- dg
-- dh
-- di Ignore_Errors mode for reading ali files
-- dj
-- dk
-- dl
-- dm
-- dn List details of manipulation of Num_Pred values
-- do Use old preference for elaboration order
-- dp
-- dq
-- dr
-- ds
-- dt
-- du List units as they are acquired
-- dv
-- dw
-- dx Force binder to read xref information from ali files
-- dy
-- dz
-- Debug flags used in package Make and its clients (e.g. GNATMAKE)
-- da
-- db
-- dc
-- dd
-- de
-- df Only output file names, not path names, in log
-- dg
-- dh
-- di
-- dj
-- dk
-- dl
-- dm
-- dn Do not delete temp files created by gnatmake
-- do
-- dp Prints the contents of the Q used by Make.Compile_Sources
-- dq Prints source files as they are enqueued and dequeued
-- dr
-- ds
-- dt Display time stamps when there is a mismatch
-- du List units as their ali files are acquired
-- dv
-- dw Prints the list of units withed by the unit currently explored
-- dx
-- dy
-- dz
--------------------------------------------
-- Documentation for Compiler Debug Flags --
--------------------------------------------
-- da Generate messages tracking semantic analyzer progress. A message
-- is output showing each node as it gets analyzed, expanded,
-- resolved, or evaluated. This option is useful for finding out
-- exactly where a bomb during semantic analysis is occurring.
-- db In Exp_Dbug, certain type names are encoded to include debugging
-- information. This debug switch causes lines to be output showing
-- the encodings used.
-- dc List names of units as they are compiled. One line of output will
-- be generated at the start of compiling each unit (package or
-- subprogram).
-- dd Dynamic allocation of tables messages generated. Each time a
-- table is reallocated, a line is output indicating the expansion.
-- de List the entity table
-- df Full tree/source print (includes withed units). Normally the tree
-- output (dt) or recreated source output (dg,do,ds) includes only
-- the main unit. If df is set, then the output in either case
-- includes all compiled units (see also dg,do,ds,dt). Note that to
-- be effective, this swich must be used in combination with one or
-- more of dt, dg, do or ds.
-- dg Print the source recreated from the generated tree. In the case
-- where the tree has been rewritten this output includes only the
-- generated code, not the original code (see also df,do,ds,dz).
-- This flag differs from -gnatG in that the output also includes
-- non-source generated null statements, and freeze nodes, which
-- are normally omitted in -gnatG mode.
-- dh Generates a table at the end of a compilation showing how the hash
-- table chains built by the Namet package are loaded. This is useful
-- in ensuring that the hashing algorithm (in Namet.Hash) is working
-- effectively with typical sets of program identifiers.
-- di Generate messages for visibility linking/delinking
-- dj Suppress "junk null check" for access parameters. This flag permits
-- Ada programs to pass null parameters to access parameters, and to
-- explicitly check such access values against the null literal.
-- Neither of these is valid Ada, but both were allowed in versions of
-- GNAT before 3.10, so this switch can ease the transition process.
-- dk Immediate kill on abort. Normally on an abort (i.e. a call to
-- Comperr.Compiler_Abort), the GNATBUG message is not given if
-- there is a previous error. This debug switch bypasses this test
-- and gives the message unconditionally (useful for debugging).
-- dl Generate unit load trace messages. A line of traceback output is
-- generated each time a request is made to the library manager to
-- load a new unit.
-- dm Some features are permitted only in OpenVMS ports of GNAT (e.g.
-- the specification of passing by descriptor). Normally any use
-- of these features will be flagged as an error, but this debug
-- flag allows acceptance of these features in non OpenVMS ports.
-- Of course they may not have any useful effect, and in particular
-- attempting to generate code with this flag set may blow up.
-- The flag also forces the use of 64-bits for Long_Integer.
-- dn Generate messages for node/list allocation. Each time a node or
-- list header is allocated, a line of output is generated. Certain
-- other basic tree operations also cause a line of output to be
-- generated. This option is useful in seeing where the parser is
-- blowing up.
-- do Print the source recreated from the generated tree. In the case
-- where the tree has been rewritten, this output includes only the
-- original code, not the generated code (see also df,dg,ds,dz).
-- dp Generate messages for parser scope stack push/pops. A line of
-- output by the parser each time the parser scope stack is either
-- pushed or popped. Useful in debugging situations where the
-- parser scope stack ends up incorrectly synchronized
-- dq In layout version 1.38, 2002/01/12, a circuit was implemented
-- to give decent default alignment to short records that had no
-- specific alignment set. This debug option restores the previous
-- behavior of giving such records poor alignments, typically 1.
-- This may be useful in dealing with transition.
-- dr Generate parser resynchronization messages. Normally the parser
-- resynchronizes quietly. With this debug option, two messages
-- are generated, one when the parser starts a resynchronization
-- skip, and another when it resumes parsing. Useful in debugging
-- inadequate error recovery situations.
-- ds Print the source recreated from the generated tree. In the case
-- where the tree has been rewritten this output includes both the
-- generated code and the original code with the generated code
-- being enlosed in curly brackets (see also df,do,ds,dz)
-- dt Print full tree. The generated tree is output (see also df,dy)
-- du Uncheck categorization pragmas. This debug switch causes the
-- categorization pragmas (Pure, Preelaborate etc) to be ignored
-- so that normal checks are not made (this is particularly useful
-- for adding temporary debugging code to units that have pragmas
-- that are inconsistent with the debugging code added.
-- dv Output trace of overload resolution. Outputs messages for
-- overload attempts that involve cascaded errors, or where
-- an interepretation is incompatible with the context.
-- dw Write semantic scope stack messages. Each time a scope is created
-- or removed, a message is output (see the Sem_Ch8.Push_Scope and
-- Sem_Ch8.Pop_Scope subprograms).
-- dx Force expansion on, even if no code being generated. Normally the
-- expander is inhibited if no code is generated. This switch forces
-- expansion to proceed normally even if the backend is not being
-- called. This is particularly useful for debugging purposes when
-- using the front-end only version of the compiler (which normally
-- would never do any expansion).
-- dy Print tree of package Standard. Normally the tree print out does
-- not include package Standard, even if the -df switch is set. This
-- switch forces output of the internal tree built for Standard.
-- dz Print source of package Standard. Normally the source print out
-- does not include package Standard, even if the -df switch is set.
-- This switch forces output of the source recreated from the internal
-- tree built for Standard. Note that this differs from -gnatS in
-- that it prints from the actual tree using the normal Sprint
-- circuitry for printing trees.
-- dA Forces output of representation information, including full
-- information for all internal type and object entities, as well
-- as all user defined type and object entities including private
-- and incomplete types. This debug switch also automatically sets
-- the equivalent of -gnatR3m.
-- dB Output debug encodings for types and variants. See Exp_Dbug for
-- exact form of the generated output.
-- dC Output trace information showing the decisions made during
-- check suppression activity in unit Checks.
-- dD Delete new elaboration checks. This flag causes GNAT to return
-- to the 3.13a elaboration semantics, and to suppress the fixing
-- of two bugs. The first is in the context of inner routines in
-- dynamic elaboration mode, when the subprogram we are in was
-- called at elaboration time by a unit that was also compiled with
-- dynamic elaboration checks. In this case, if A calls B calls C,
-- and all are in different units, we need an elaboration check at
-- each call. These nested checks were only put in recently (see
-- version 1.80 of Sem_Elab) and we provide this debug flag to
-- revert to the previous behavior in case of regressions. The
-- other behavior reverted by this flag is the treatment of the
-- Elaborate_Body pragma in static elaboration mode. This used to
-- be treated as not needing elaboration checking, but in fact in
-- general Elaborate_All is still required because of nested calls.
-- dE Apply compile time elaboration checking for with relations between
-- predefined units. Normally no checks are made (it seems that at
-- least on the SGI, such checks run into trouble).
-- dF Front end data layout enabled. Normally front end data layout
-- is only enabled if the target parameter Backend_Layout is False.
-- This debugging switch enables it unconditionally.
-- dG Generate all warnings. Normally Errout suppresses warnings on
-- units that are not part of the main extended source, and also
-- suppresses warnings on instantiations in the main extended
-- source that duplicate warnings already posted on the template.
-- This switch stops both kinds of deletion and causes Errout to
-- post all warnings sent to it.
-- dH Inhibit call to gigi. This is useful for testing front end data
-- layout, and may be useful in other debugging situations where
-- you do not want gigi to intefere with the testing.
-- dI Inhibit internal name numbering in gnatDG listing. Any sequence of
-- the form <uppercase-letter><digits><lowercase-letter> appearing in
-- a name is replaced by <uppercase-letter>...<lowercase-letter>. This
-- is used in the fixed bugs run to minimize system and version
-- dependency in filed -gnatD or -gnatG output.
-- dJ Generate debugging trace output for the JGNAT back end. This
-- consists of symbolic Java Byte Code sequences for all generated
-- classes plus additional information to indicate local variables
-- and methods.
-- dK Kill all error messages. This debug flag suppresses the output
-- of all error messages. It is used in regression tests where the
-- error messages are target dependent and irrelevant.
-- dL Output trace information on elaboration checking. This debug
-- switch causes output to be generated showing each call or
-- instantiation as it is checked, and the progress of the recursive
-- trace through calls at elaboration time.
-- dM Assume all variables have been modified, and ignore current value
-- indications. This debug flag disconnects the tracking of constant
-- values (see Exp_Ch2.Expand_Current_Value).
-- dN Do not generate file name information in exception messages
-- dO Output immediate error messages. This causes error messages to
-- be output as soon as they are generated (disconnecting several
-- circuits for improvement of messages, deletion of duplicate
-- messages etc). Useful to diagnose compiler bombs caused by
-- erroneous handling of error situations
-- dP Do not check for controlled objects in preelaborable packages.
-- RM 10.2.1(9) forbids the use of library level controlled objects
-- in preelaborable packages, but this restriction is a huge pain,
-- especially in the predefined library units.
-- dR Bypass the check for a proper version of s-rpc being present
-- to use the -gnatz? switch. This allows debugging of the use
-- of stubs generation without needing to have GLADE (or some
-- other PCS installed).
-- dS Omit conversion of fpt numbers to exact machine numbers in
-- non-static evaluation contexts (see Check_Non_Static_Context).
-- This is intended for testing out timing problems with this
-- conversion circuit.
-- dT Similar to dS, but omits the conversions only in the case where
-- the parent is not a constant declaration.
-- dU Enable garbage collection of unreachable entities. This enables
-- both the reachability analysis and changing the Is_Public and
-- Is_Eliminated flags.
-- dV Enable viewing of all symbols in debugger. Causes debug information
-- to be generated for all symbols, including internal symbols. This
-- is enabled by default for -gnatD, but this switch allows this to
-- be enabled without generating modified source files. Note that the
-- use of -gnatdV ensures in the dwarf/elf case that all symbols that
-- are present in the elf tables are also in the dwarf tables (which
-- seems to be required by some tools). Another effect of dV is to
-- generate full qualified names, including internal names generated
-- for blocks and loops.
-- dW Disable warnings when a possibly uninitialized scalar value is
-- passed to an IN OUT parameter of a procedure. This usage is a
-- quite improper bounded error [erroneous in Ada 83] situation,
-- and would normally generate a warning. However, to ease the
-- task of transitioning incorrect legacy code, we provide this
-- undocumented feature for suppressing these warnings.
-- dY Enable configurable run-time mode, just as though the System file
-- had Configurable_Run_Time_Mode set to True. This is useful in
-- testing high integrity mode.
-- dZ Generate listing showing the contents of the dispatch tables. Each
-- line has an internally generated number used for references between
-- tagged types and primitives. For each primitive the output has the
-- following fields:
--
-- - Letter 'P' or letter 's': The former indicates that this
-- primitive will be located in a primary dispatch table. The
-- latter indicates that it will be located in a secondary
-- dispatch table.
--
-- - Name of the primitive. In case of predefined Ada primitives
-- the text "(predefined)" is added before the name, and these
-- acronyms are used: SR (Stream_Read), SW (Stream_Write), SI
-- (Stream_Input), SO (Stream_Output), DA (Deep_Adjust), DF
-- (Deep_Finalize). In addition Oeq identifies the equality
-- operator, and "_assign" the assignment.
--
-- - If the primitive covers interface types, two extra fields
-- referencing other primitives are generated: "Alias" references
-- the primitive of the tagged type that covers an interface
-- primitive, and "AI_Alias" references the covered interface
-- primitive.
--
-- - The expression "at #xx" indicates the slot of the dispatch
-- table occupied by such primitive in its corresponding primary
-- or secondary dispatch table.
--
-- - In case of abstract subprograms the text "is abstract" is
-- added at the end of the line.
-- d.a Force Target_Strict_Alignment to True, even on targets where it
-- would normally be false. Can be used for testing strict alignment
-- circuitry in the compiler.
-- d.c Generate inline concatenation, instead of calling one of the
-- System.Concat_n.Str_Concat_n routines in cases where the latter
-- routines would normally be called.
-- d.f Suppress folding of static expressions. This of course results
-- in seriously non-conforming behavior, but is useful sometimes
-- when tracking down handling of complex expressions.
-- d.g Enables conversion of a raise statement into a goto when the
-- relevant handler is statically determinable. For now we only try
-- this if this debug flag is set. Later we will enable this more
-- generally by default.
-- d.i Ignore all occurrences of pragma Warnings in the sources. This can
-- be used in particular to disable Warnings (Off) to check if any of
-- these statements are inappropriate.
-- d.l Use Ada 95 semantics for limited function returns. This may be
-- used to work around the incompatibility introduced by AI-318-2.
-- It is useful only in -gnat05 mode.
-- d.m When -gnatl is used, the normal output includes full listings of
-- all files in the extended main source (body/spec/subunits). If this
-- debug switch is used, then the full listing is given only for the
-- main source (this corresponds to a previous behavior of -gnatl and
-- is used for running the ACATS tests).
-- d.n Print source file names as they are loaded. This is useful if the
-- compiler has a bug -- these are the files that need to be included
-- in a bug report.
-- d.r Forces the flag OK_To_Reorder_Components to be set in all record
-- base types that have no discriminants.
-- d.s Normally the compiler expands slice moves into loops if overlap
-- might be possible. This debug flag inhibits that expansion, and
-- the back end is expected to use an appropriate routine to handle
-- overlap, based on Forward_OK and Backwards_OK flags.
-- d.t The compiler has been modified (a fairly extensive modification)
-- to generate static dispatch tables for library level tagged types.
-- This debug switch disables this modification and reverts to the
-- previous dynamic construction of tables. It is there as a possible
-- work around if we run into trouble with the new implementation.
-- d.v Forces the flag OK_To_Reorder_Components to be set in all record
-- base types that have at least one discriminant (v = variant).
-- d.w This flag turns off the scanning of loops to detect possible
-- infinite loops.
-- d.x No exception handlers in generated code. This causes exception
-- handlers to be eliminated from the generated code. They are still
-- fully compiled and analyzed, they just get eliminated from the
-- code generation step.
-- d.C Generate call to System.Concat_n.Str_Concat_n routines in cases
-- where we would normally generate inline concatenation code.
-- d.I Generate SCIL mode. Generate intermediate code for the sake of
-- of static analysis tools, and ensure additional tree consistency
-- between different compilations of specs.
-- d.J Ensure the SCIL generated is compatible with parallel builds.
-- This means in particular not writing the same files under the
-- same directory.
-- d.O Dump internal SCO tables. Before outputting the SCO information to
-- the ALI file, the internal SCO tables (SCO_Table/SCO_Unit_Table)
-- are dumped for debugging purposes.
-- d.S Force Optimize_Alignment (Space) mode as the default
-- d.T Force Optimize_Alignment (Time) mode as the default
-- d.W Print out debugging information for Walk_Library_Items, including
-- the order in which units are walked. This is primarily for SofCheck
-- Inspector.
-- d.X By default, the compiler uses an elaborate rewriting framework for
-- short-circuited forms where the right hand condition generates
-- actions to be inserted. With the gcc backend, we now use the new
-- N_Expression_With_Actions node for this expansion, but we still use
-- the old method for other backends and in SCIL mode. This debug flag
-- forces use of the new N_Expression_With_Actions node in these other
-- cases and is intended for transitional use.
-- d.Y Prevents the use of the N_Expression_With_Actions node even in the
-- case of the gcc back end. Provided as a back up in case the new
-- scheme has problems.
-- d1 Error messages have node numbers where possible. Normally error
-- messages have only source locations. This option is useful when
-- debugging errors caused by expanded code, where the source location
-- does not give enough information.
-- d2 Suppress output of the error position flags for verbose form error
-- messages. The messages are still interspersed in the listing, but
-- without any error flags or extra blank lines. Also causes an extra
-- <<< to be output at the right margin. This is intended to be the
-- easiest format for checking conformance of ACATS B tests. This
-- flag also suppresses the additional messages explaining why a
-- non-static expression is non-static (see Sem_Eval.Why_Not_Static).
-- This avoids having to worry about these messages in ACATS testing.
-- d3 Causes Comperr to dump the contents of the node for which an abort
-- was detected (normally only the Node_Id of the node is output).
-- d4 Inhibits automatic krunching of predefined library unit file names.
-- Normally, as described in the spec of package Krunch, such files
-- are automatically krunched to 8 characters, with special treatment
-- of the prefixes Ada, System, and Interfaces. Setting this debug
-- switch disables this special treatment.
-- d5 Causes the tree read/write circuit to output detailed information
-- tracking the data that is read and written element by element.
-- d6 Normally access-to-unconstrained-array types are represented
-- using fat (double) pointers. Using this debug flag causes them
-- to default to thin. This can be used to test the performance
-- implications of using thin pointers, and also to test that the
-- compiler functions correctly with this choice.
-- d7 Normally a -gnatl or -gnatv listing includes the time stamp
-- of the source file. This debug flag suppresses this output,
-- and also suppresses the message with the version number.
-- This is useful in certain regression tests.
-- d8 This forces the packed stuff to generate code assuming the
-- opposite endianness from the actual correct value. Useful in
-- testing out code generation from the packed routines.
------------------------------------------
-- Documentation for Binder Debug Flags --
------------------------------------------
-- da Normally if there is an elaboration circularity, then in describing
-- the cycle, links involving internal units are omitted, since they
-- are irrelevant and confusing. This debug flag causes all links to
-- be listed, and is useful when diagnosing circularities introduced
-- by incorrect changes to the run-time library itself.
-- db Output debug information from Better_Choice in Binde, which uses
-- various heuristics to determine elaboration order in cases where
-- multiple orders are valid.
-- dc List units as they are chosen. As units are selected for addition to
-- the elaboration order, a line of output is generated showing which
-- unit has been selected.
-- de Similar to the effect of -e (output complete list of elaboration
-- dependencies) except that internal units are included in the
-- listing.
-- di Normally gnatbind calls Read_Ali with Ignore_Errors set to
-- False, since the binder really needs correct version ALI
-- files to do its job. This debug flag causes Ignore_Errors
-- mode to be set for the binder (and is particularly useful
-- for testing ignore errors mode).
-- dn List details of manipulation of Num_Pred values during execution of
-- the algorithm used to determine a correct order of elaboration. This
-- is useful in diagnosing any problems in its behavior.
-- do Use old elaboration order preference. The new preference rules
-- prefer specs with no bodies to specs with bodies, and between two
-- specs with bodies, prefers the one whose body is closer to being
-- able to be elaborated. This is a clear improvement, but we provide
-- this debug flag in case of regressions.
-- du List unit name and file name for each unit as it is read in
-- dx Force the binder to read (and then ignore) the xref information
-- in ali files (used to check that read circuit is working OK).
--------------------------------------------
-- Documentation for gnatmake Debug Flags --
--------------------------------------------
-- df Only output file names, not path names, in log
-- dn Do not delete temporary files created by gnatmake at the end
-- of execution, such as temporary config pragma files, mapping
-- files or project path files.
-- dp Prints the Q used by routine Make.Compile_Sources every time
-- we go around the main compile loop of Make.Compile_Sources
-- dq Prints source files as they are enqueued and dequeued in the Q
-- used by routine Make.Compile_Sources. Useful to figure out the
-- order in which sources are recompiled.
-- dt When a time stamp mismatch has been found for an ALI file,
-- display the source file name, the time stamp expected and
-- the time stamp found.
-- du List unit name and file name for each unit as it is read in
-- dw Prints the list of units withed by the unit currently explored
-- during the main loop of Make.Compile_Sources.
---------------------------------------------
-- Documentation for gprbuild Debug Flags --
---------------------------------------------
-- dn Do not delete temporary files createed by gprbuild at the end
-- of execution, such as temporary config pragma files, mapping
-- files or project path files.
-- dt When a time stamp mismatch has been found for an ALI file,
-- display the source file name, the time stamp expected and
-- the time stamp found.
--------------------
-- Set_Debug_Flag --
--------------------
procedure Set_Debug_Flag (C : Character; Val : Boolean := True) is
subtype Dig is Character range '1' .. '9';
subtype LLet is Character range 'a' .. 'z';
subtype ULet is Character range 'A' .. 'Z';
begin
if C in Dig then
case Dig (C) is
when '1' => Debug_Flag_1 := Val;
when '2' => Debug_Flag_2 := Val;
when '3' => Debug_Flag_3 := Val;
when '4' => Debug_Flag_4 := Val;
when '5' => Debug_Flag_5 := Val;
when '6' => Debug_Flag_6 := Val;
when '7' => Debug_Flag_7 := Val;
when '8' => Debug_Flag_8 := Val;
when '9' => Debug_Flag_9 := Val;
end case;
elsif C in ULet then
case ULet (C) is
when 'A' => Debug_Flag_AA := Val;
when 'B' => Debug_Flag_BB := Val;
when 'C' => Debug_Flag_CC := Val;
when 'D' => Debug_Flag_DD := Val;
when 'E' => Debug_Flag_EE := Val;
when 'F' => Debug_Flag_FF := Val;
when 'G' => Debug_Flag_GG := Val;
when 'H' => Debug_Flag_HH := Val;
when 'I' => Debug_Flag_II := Val;
when 'J' => Debug_Flag_JJ := Val;
when 'K' => Debug_Flag_KK := Val;
when 'L' => Debug_Flag_LL := Val;
when 'M' => Debug_Flag_MM := Val;
when 'N' => Debug_Flag_NN := Val;
when 'O' => Debug_Flag_OO := Val;
when 'P' => Debug_Flag_PP := Val;
when 'Q' => Debug_Flag_QQ := Val;
when 'R' => Debug_Flag_RR := Val;
when 'S' => Debug_Flag_SS := Val;
when 'T' => Debug_Flag_TT := Val;
when 'U' => Debug_Flag_UU := Val;
when 'V' => Debug_Flag_VV := Val;
when 'W' => Debug_Flag_WW := Val;
when 'X' => Debug_Flag_XX := Val;
when 'Y' => Debug_Flag_YY := Val;
when 'Z' => Debug_Flag_ZZ := Val;
end case;
else
case LLet (C) is
when 'a' => Debug_Flag_A := Val;
when 'b' => Debug_Flag_B := Val;
when 'c' => Debug_Flag_C := Val;
when 'd' => Debug_Flag_D := Val;
when 'e' => Debug_Flag_E := Val;
when 'f' => Debug_Flag_F := Val;
when 'g' => Debug_Flag_G := Val;
when 'h' => Debug_Flag_H := Val;
when 'i' => Debug_Flag_I := Val;
when 'j' => Debug_Flag_J := Val;
when 'k' => Debug_Flag_K := Val;
when 'l' => Debug_Flag_L := Val;
when 'm' => Debug_Flag_M := Val;
when 'n' => Debug_Flag_N := Val;
when 'o' => Debug_Flag_O := Val;
when 'p' => Debug_Flag_P := Val;
when 'q' => Debug_Flag_Q := Val;
when 'r' => Debug_Flag_R := Val;
when 's' => Debug_Flag_S := Val;
when 't' => Debug_Flag_T := Val;
when 'u' => Debug_Flag_U := Val;
when 'v' => Debug_Flag_V := Val;
when 'w' => Debug_Flag_W := Val;
when 'x' => Debug_Flag_X := Val;
when 'y' => Debug_Flag_Y := Val;
when 'z' => Debug_Flag_Z := Val;
end case;
end if;
end Set_Debug_Flag;
---------------------------
-- Set_Dotted_Debug_Flag --
---------------------------
procedure Set_Dotted_Debug_Flag (C : Character; Val : Boolean := True) is
subtype Dig is Character range '1' .. '9';
subtype LLet is Character range 'a' .. 'z';
subtype ULet is Character range 'A' .. 'Z';
begin
if C in Dig then
case Dig (C) is
when '1' => Debug_Flag_Dot_1 := Val;
when '2' => Debug_Flag_Dot_2 := Val;
when '3' => Debug_Flag_Dot_3 := Val;
when '4' => Debug_Flag_Dot_4 := Val;
when '5' => Debug_Flag_Dot_5 := Val;
when '6' => Debug_Flag_Dot_6 := Val;
when '7' => Debug_Flag_Dot_7 := Val;
when '8' => Debug_Flag_Dot_8 := Val;
when '9' => Debug_Flag_Dot_9 := Val;
end case;
elsif C in ULet then
case ULet (C) is
when 'A' => Debug_Flag_Dot_AA := Val;
when 'B' => Debug_Flag_Dot_BB := Val;
when 'C' => Debug_Flag_Dot_CC := Val;
when 'D' => Debug_Flag_Dot_DD := Val;
when 'E' => Debug_Flag_Dot_EE := Val;
when 'F' => Debug_Flag_Dot_FF := Val;
when 'G' => Debug_Flag_Dot_GG := Val;
when 'H' => Debug_Flag_Dot_HH := Val;
when 'I' => Debug_Flag_Dot_II := Val;
when 'J' => Debug_Flag_Dot_JJ := Val;
when 'K' => Debug_Flag_Dot_KK := Val;
when 'L' => Debug_Flag_Dot_LL := Val;
when 'M' => Debug_Flag_Dot_MM := Val;
when 'N' => Debug_Flag_Dot_NN := Val;
when 'O' => Debug_Flag_Dot_OO := Val;
when 'P' => Debug_Flag_Dot_PP := Val;
when 'Q' => Debug_Flag_Dot_QQ := Val;
when 'R' => Debug_Flag_Dot_RR := Val;
when 'S' => Debug_Flag_Dot_SS := Val;
when 'T' => Debug_Flag_Dot_TT := Val;
when 'U' => Debug_Flag_Dot_UU := Val;
when 'V' => Debug_Flag_Dot_VV := Val;
when 'W' => Debug_Flag_Dot_WW := Val;
when 'X' => Debug_Flag_Dot_XX := Val;
when 'Y' => Debug_Flag_Dot_YY := Val;
when 'Z' => Debug_Flag_Dot_ZZ := Val;
end case;
else
case LLet (C) is
when 'a' => Debug_Flag_Dot_A := Val;
when 'b' => Debug_Flag_Dot_B := Val;
when 'c' => Debug_Flag_Dot_C := Val;
when 'd' => Debug_Flag_Dot_D := Val;
when 'e' => Debug_Flag_Dot_E := Val;
when 'f' => Debug_Flag_Dot_F := Val;
when 'g' => Debug_Flag_Dot_G := Val;
when 'h' => Debug_Flag_Dot_H := Val;
when 'i' => Debug_Flag_Dot_I := Val;
when 'j' => Debug_Flag_Dot_J := Val;
when 'k' => Debug_Flag_Dot_K := Val;
when 'l' => Debug_Flag_Dot_L := Val;
when 'm' => Debug_Flag_Dot_M := Val;
when 'n' => Debug_Flag_Dot_N := Val;
when 'o' => Debug_Flag_Dot_O := Val;
when 'p' => Debug_Flag_Dot_P := Val;
when 'q' => Debug_Flag_Dot_Q := Val;
when 'r' => Debug_Flag_Dot_R := Val;
when 's' => Debug_Flag_Dot_S := Val;
when 't' => Debug_Flag_Dot_T := Val;
when 'u' => Debug_Flag_Dot_U := Val;
when 'v' => Debug_Flag_Dot_V := Val;
when 'w' => Debug_Flag_Dot_W := Val;
when 'x' => Debug_Flag_Dot_X := Val;
when 'y' => Debug_Flag_Dot_Y := Val;
when 'z' => Debug_Flag_Dot_Z := Val;
end case;
end if;
end Set_Dotted_Debug_Flag;
end Debug;
|