aboutsummaryrefslogtreecommitdiff
path: root/gprof/cg_print.c
blob: 4799bc7822ea5926793e893fce83c9877dc3a3ff (plain)
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
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
/* cg_print.c -  Print routines for displaying call graphs.

   Copyright 2000, 2001, 2002, 2004, 2007 Free Software Foundation, Inc.

   This file is part of GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#include "libiberty.h"
#include "gprof.h"
#include "search_list.h"
#include "source.h"
#include "symtab.h"
#include "cg_arcs.h"
#include "cg_print.h"
#include "hist.h"
#include "utils.h"
#include "corefile.h"

/* Return value of comparison functions used to sort tables.  */
#define	LESSTHAN	-1
#define	EQUALTO		0
#define	GREATERTHAN	1

static void print_header (void);
static void print_cycle (Sym *);
static int cmp_member (Sym *, Sym *);
static void sort_members (Sym *);
static void print_members (Sym *);
static int cmp_arc (Arc *, Arc *);
static void sort_parents (Sym *);
static void print_parents (Sym *);
static void sort_children (Sym *);
static void print_children (Sym *);
static void print_line (Sym *);
static int cmp_name (const PTR, const PTR);
static int cmp_arc_count (const PTR, const PTR);
static int cmp_fun_nuses (const PTR, const PTR);
static void order_and_dump_functions_by_arcs
  (Arc **, unsigned long, int, Arc **, unsigned long *);

/* Declarations of automatically generated functions to output blurbs.  */
extern void bsd_callg_blurb (FILE * fp);
extern void fsf_callg_blurb (FILE * fp);

double print_time = 0.0;


static void
print_header ()
{
  if (first_output)
    first_output = FALSE;
  else
    printf ("\f\n");

  if (!bsd_style_output)
    {
      if (print_descriptions)
	printf (_("\t\t     Call graph (explanation follows)\n\n"));
      else
	printf (_("\t\t\tCall graph\n\n"));
    }

  printf (_("\ngranularity: each sample hit covers %ld byte(s)"),
	  (long) hist_scale * (long) sizeof (UNIT));

  if (print_time > 0.0)
    printf (_(" for %.2f%% of %.2f seconds\n\n"),
	    100.0 / print_time, print_time / hz);
  else
    {
      printf (_(" no time propagated\n\n"));

      /* This doesn't hurt, since all the numerators will be 0.0.  */
      print_time = 1.0;
    }

  if (bsd_style_output)
    {
      printf ("%6.6s %5.5s %7.7s %11.11s %7.7s/%-7.7s     %-8.8s\n",
	      "", "", "", "", _("called"), _("total"), _("parents"));
      printf ("%-6.6s %5.5s %7.7s %11.11s %7.7s+%-7.7s %-8.8s\t%5.5s\n",
	      _("index"), _("%time"), _("self"), _("descendants"),
	      _("called"), _("self"), _("name"), _("index"));
      printf ("%6.6s %5.5s %7.7s %11.11s %7.7s/%-7.7s     %-8.8s\n",
	      "", "", "", "", _("called"), _("total"), _("children"));
      printf ("\n");
    }
  else
    {
      printf (_("index %% time    self  children    called     name\n"));
    }
}

/* Print a cycle header.  */

static void
print_cycle (Sym *cyc)
{
  char buf[BUFSIZ];

  sprintf (buf, "[%d]", cyc->cg.index);
  printf (bsd_style_output
	  ? "%-6.6s %5.1f %7.2f %11.2f %7lu"
	  : "%-6.6s %5.1f %7.2f %7.2f %7lu", buf,
	  100 * (cyc->cg.prop.self + cyc->cg.prop.child) / print_time,
	  cyc->cg.prop.self / hz, cyc->cg.prop.child / hz, cyc->ncalls);

  if (cyc->cg.self_calls != 0)
    printf ("+%-7lu", cyc->cg.self_calls);
  else
    printf (" %7.7s", "");

  printf (_(" <cycle %d as a whole> [%d]\n"), cyc->cg.cyc.num, cyc->cg.index);
}

/* Compare LEFT and RIGHT membmer.  Major comparison key is
   CG.PROP.SELF+CG.PROP.CHILD, secondary key is NCALLS+CG.SELF_CALLS.  */

static int
cmp_member (Sym *left, Sym *right)
{
  double left_time = left->cg.prop.self + left->cg.prop.child;
  double right_time = right->cg.prop.self + right->cg.prop.child;
  unsigned long left_calls = left->ncalls + left->cg.self_calls;
  unsigned long right_calls = right->ncalls + right->cg.self_calls;

  if (left_time > right_time)
    return GREATERTHAN;

  if (left_time < right_time)
    return LESSTHAN;

  if (left_calls > right_calls)
    return GREATERTHAN;

  if (left_calls < right_calls)
    return LESSTHAN;

  return EQUALTO;
}

/* Sort members of a cycle.  */

static void
sort_members (Sym *cyc)
{
  Sym *todo, *doing, *prev;

  /* Detach cycle members from cyclehead,
     and insertion sort them back on.  */
  todo = cyc->cg.cyc.next;
  cyc->cg.cyc.next = 0;

  for (doing = todo; doing != NULL; doing = todo)
    {
      todo = doing->cg.cyc.next;

      for (prev = cyc; prev->cg.cyc.next; prev = prev->cg.cyc.next)
	{
	  if (cmp_member (doing, prev->cg.cyc.next) == GREATERTHAN)
	    break;
	}

      doing->cg.cyc.next = prev->cg.cyc.next;
      prev->cg.cyc.next = doing;
    }
}

/* Print the members of a cycle.  */

static void
print_members (Sym *cyc)
{
  Sym *member;

  sort_members (cyc);

  for (member = cyc->cg.cyc.next; member; member = member->cg.cyc.next)
    {
      printf (bsd_style_output
	      ? "%6.6s %5.5s %7.2f %11.2f %7lu"
	      : "%6.6s %5.5s %7.2f %7.2f %7lu",
	      "", "", member->cg.prop.self / hz, member->cg.prop.child / hz,
	      member->ncalls);

      if (member->cg.self_calls != 0)
	printf ("+%-7lu", member->cg.self_calls);
      else
	printf (" %7.7s", "");

      printf ("     ");
      print_name (member);
      printf ("\n");
    }
}

/* Compare two arcs to/from the same child/parent.
	- if one arc is a self arc, it's least.
	- if one arc is within a cycle, it's less than.
	- if both arcs are within a cycle, compare arc counts.
	- if neither arc is within a cycle, compare with
		time + child_time as major key
		arc count as minor key.  */

static int
cmp_arc (Arc *left, Arc *right)
{
  Sym *left_parent = left->parent;
  Sym *left_child = left->child;
  Sym *right_parent = right->parent;
  Sym *right_child = right->child;
  double left_time, right_time;

  DBG (TIMEDEBUG,
       printf ("[cmp_arc] ");
       print_name (left_parent);
       printf (" calls ");
       print_name (left_child);
       printf (" %f + %f %lu/%lu\n", left->time, left->child_time,
	       left->count, left_child->ncalls);
       printf ("[cmp_arc] ");
       print_name (right_parent);
       printf (" calls ");
       print_name (right_child);
       printf (" %f + %f %lu/%lu\n", right->time, right->child_time,
	       right->count, right_child->ncalls);
       printf ("\n");
    );

  if (left_parent == left_child)
    return LESSTHAN;		/* Left is a self call.  */

  if (right_parent == right_child)
    return GREATERTHAN;		/* Right is a self call.  */

  if (left_parent->cg.cyc.num != 0 && left_child->cg.cyc.num != 0
      && left_parent->cg.cyc.num == left_child->cg.cyc.num)
    {
      /* Left is a call within a cycle.  */
      if (right_parent->cg.cyc.num != 0 && right_child->cg.cyc.num != 0
	  && right_parent->cg.cyc.num == right_child->cg.cyc.num)
	{
	  /* Right is a call within the cycle, too.  */
	  if (left->count < right->count)
	    return LESSTHAN;

	  if (left->count > right->count)
	    return GREATERTHAN;

	  return EQUALTO;
	}
      else
	{
	  /* Right isn't a call within the cycle.  */
	  return LESSTHAN;
	}
    }
  else
    {
      /* Left isn't a call within a cycle.  */
      if (right_parent->cg.cyc.num != 0 && right_child->cg.cyc.num != 0
	  && right_parent->cg.cyc.num == right_child->cg.cyc.num)
	{
	  /* Right is a call within a cycle.  */
	  return GREATERTHAN;
	}
      else
	{
	  /* Neither is a call within a cycle.  */
	  left_time = left->time + left->child_time;
	  right_time = right->time + right->child_time;

	  if (left_time < right_time)
	    return LESSTHAN;

	  if (left_time > right_time)
	    return GREATERTHAN;

	  if (left->count < right->count)
	    return LESSTHAN;

	  if (left->count > right->count)
	    return GREATERTHAN;

	  return EQUALTO;
	}
    }
}


static void
sort_parents (Sym * child)
{
  Arc *arc, *detached, sorted, *prev;

  /* Unlink parents from child, then insertion sort back on to
     sorted's parents.
	  *arc        the arc you have detached and are inserting.
	  *detached   the rest of the arcs to be sorted.
	  sorted      arc list onto which you insertion sort.
	  *prev       arc before the arc you are comparing.  */
  sorted.next_parent = 0;

  for (arc = child->cg.parents; arc; arc = detached)
    {
      detached = arc->next_parent;

      /* Consider *arc as disconnected; insert it into sorted.  */
      for (prev = &sorted; prev->next_parent; prev = prev->next_parent)
	{
	  if (cmp_arc (arc, prev->next_parent) != GREATERTHAN)
	    break;
	}

      arc->next_parent = prev->next_parent;
      prev->next_parent = arc;
    }

  /* Reattach sorted arcs to child.  */
  child->cg.parents = sorted.next_parent;
}


static void
print_parents (Sym *child)
{
  Sym *parent;
  Arc *arc;
  Sym *cycle_head;

  if (child->cg.cyc.head != 0)
    cycle_head = child->cg.cyc.head;
  else
    cycle_head = child;

  if (!child->cg.parents)
    {
      printf (bsd_style_output
	      ? _("%6.6s %5.5s %7.7s %11.11s %7.7s %7.7s     <spontaneous>\n")
	      : _("%6.6s %5.5s %7.7s %7.7s %7.7s %7.7s     <spontaneous>\n"),
	      "", "", "", "", "", "");
      return;
    }

  sort_parents (child);

  for (arc = child->cg.parents; arc; arc = arc->next_parent)
    {
      parent = arc->parent;
      if (child == parent || (child->cg.cyc.num != 0
			      && parent->cg.cyc.num == child->cg.cyc.num))
	{
	  /* Selfcall or call among siblings.  */
	  printf (bsd_style_output
		  ? "%6.6s %5.5s %7.7s %11.11s %7lu %7.7s     "
		  : "%6.6s %5.5s %7.7s %7.7s %7lu %7.7s     ",
		  "", "", "", "",
		  arc->count, "");
	  print_name (parent);
	  printf ("\n");
	}
      else
	{
	  /* Regular parent of child.  */
	  printf (bsd_style_output
		  ? "%6.6s %5.5s %7.2f %11.2f %7lu/%-7lu     "
		  : "%6.6s %5.5s %7.2f %7.2f %7lu/%-7lu     ",
		  "", "",
		  arc->time / hz, arc->child_time / hz,
		  arc->count, cycle_head->ncalls);
	  print_name (parent);
	  printf ("\n");
	}
    }
}


static void
sort_children (Sym *parent)
{
  Arc *arc, *detached, sorted, *prev;

  /* Unlink children from parent, then insertion sort back on to
     sorted's children.
	  *arc        the arc you have detached and are inserting.
	  *detached   the rest of the arcs to be sorted.
	  sorted      arc list onto which you insertion sort.
	  *prev       arc before the arc you are comparing.  */
  sorted.next_child = 0;

  for (arc = parent->cg.children; arc; arc = detached)
    {
      detached = arc->next_child;

      /* Consider *arc as disconnected; insert it into sorted.  */
      for (prev = &sorted; prev->next_child; prev = prev->next_child)
	{
	  if (cmp_arc (arc, prev->next_child) != LESSTHAN)
	    break;
	}

      arc->next_child = prev->next_child;
      prev->next_child = arc;
    }

  /* Reattach sorted children to parent.  */
  parent->cg.children = sorted.next_child;
}


static void
print_children (Sym *parent)
{
  Sym *child;
  Arc *arc;

  sort_children (parent);
  arc = parent->cg.children;

  for (arc = parent->cg.children; arc; arc = arc->next_child)
    {
      child = arc->child;
      if (child == parent || (child->cg.cyc.num != 0
			      && child->cg.cyc.num == parent->cg.cyc.num))
	{
	  /* Self call or call to sibling.  */
	  printf (bsd_style_output
		  ? "%6.6s %5.5s %7.7s %11.11s %7lu %7.7s     "
		  : "%6.6s %5.5s %7.7s %7.7s %7lu %7.7s     ",
		  "", "", "", "", arc->count, "");
	  print_name (child);
	  printf ("\n");
	}
      else
	{
	  /* Regular child of parent.  */
	  printf (bsd_style_output
		  ? "%6.6s %5.5s %7.2f %11.2f %7lu/%-7lu     "
		  : "%6.6s %5.5s %7.2f %7.2f %7lu/%-7lu     ",
		  "", "",
		  arc->time / hz, arc->child_time / hz,
		  arc->count, child->cg.cyc.head->ncalls);
	  print_name (child);
	  printf ("\n");
	}
    }
}


static void
print_line (Sym *np)
{
  char buf[BUFSIZ];

  sprintf (buf, "[%d]", np->cg.index);
  printf (bsd_style_output
	  ? "%-6.6s %5.1f %7.2f %11.2f"
	  : "%-6.6s %5.1f %7.2f %7.2f", buf,
	  100 * (np->cg.prop.self + np->cg.prop.child) / print_time,
	  np->cg.prop.self / hz, np->cg.prop.child / hz);

  if ((np->ncalls + np->cg.self_calls) != 0)
    {
      printf (" %7lu", np->ncalls);

      if (np->cg.self_calls != 0)
	  printf ("+%-7lu ", np->cg.self_calls);
      else
	  printf (" %7.7s ", "");
    }
  else
    {
      printf (" %7.7s %7.7s ", "", "");
    }

  print_name (np);
  printf ("\n");
}


/* Print dynamic call graph.  */

void
cg_print (Sym ** timesortsym)
{
  unsigned int index;
  Sym *parent;

  if (print_descriptions && bsd_style_output)
    bsd_callg_blurb (stdout);

  print_header ();

  for (index = 0; index < symtab.len + num_cycles; ++index)
    {
      parent = timesortsym[index];

      if ((ignore_zeros && parent->ncalls == 0
	   && parent->cg.self_calls == 0 && parent->cg.prop.self == 0
	   && parent->cg.prop.child == 0)
	  || !parent->cg.print_flag
	  || (line_granularity && ! parent->is_func))
	continue;

      if (!parent->name && parent->cg.cyc.num != 0)
	{
	  /* Cycle header.  */
	  print_cycle (parent);
	  print_members (parent);
	}
      else
	{
	  print_parents (parent);
	  print_line (parent);
	  print_children (parent);
	}

      if (bsd_style_output)
	printf ("\n");

      printf ("-----------------------------------------------\n");

      if (bsd_style_output)
	printf ("\n");
    }

  free (timesortsym);

  if (print_descriptions && !bsd_style_output)
    fsf_callg_blurb (stdout);
}


static int
cmp_name (const PTR left, const PTR right)
{
  const Sym **npp1 = (const Sym **) left;
  const Sym **npp2 = (const Sym **) right;

  return strcmp ((*npp1)->name, (*npp2)->name);
}


void
cg_print_index ()
{
  unsigned int index;
  unsigned int nnames, todo, i, j;
  int col, starting_col;
  Sym **name_sorted_syms, *sym;
  const char *filename;
  char buf[20];
  int column_width = (output_width - 1) / 3;	/* Don't write in last col!  */

  /* Now, sort regular function name
     alphabetically to create an index.  */
  name_sorted_syms = (Sym **) xmalloc ((symtab.len + num_cycles) * sizeof (Sym *));

  for (index = 0, nnames = 0; index < symtab.len; index++)
    {
      if (ignore_zeros && symtab.base[index].ncalls == 0
	  && symtab.base[index].hist.time == 0)
	continue;

      name_sorted_syms[nnames++] = &symtab.base[index];
    }

  qsort (name_sorted_syms, nnames, sizeof (Sym *), cmp_name);

  for (index = 1, todo = nnames; index <= num_cycles; index++)
    name_sorted_syms[todo++] = &cycle_header[index];

  printf ("\f\n");
  printf (_("Index by function name\n\n"));
  index = (todo + 2) / 3;

  for (i = 0; i < index; i++)
    {
      col = 0;
      starting_col = 0;

      for (j = i; j < todo; j += index)
	{
	  sym = name_sorted_syms[j];

	  if (sym->cg.print_flag)
	    sprintf (buf, "[%d]", sym->cg.index);
	  else
	    sprintf (buf, "(%d)", sym->cg.index);

	  if (j < nnames)
	    {
	      if (bsd_style_output)
		{
		  printf ("%6.6s %-19.19s", buf, sym->name);
		}
	      else
		{
		  col += strlen (buf);

		  for (; col < starting_col + 5; ++col)
		    putchar (' ');

		  printf (" %s ", buf);
		  col += print_name_only (sym);

		  if (!line_granularity && sym->is_static && sym->file)
		    {
		      filename = sym->file->name;

		      if (!print_path)
			{
			  filename = strrchr (filename, '/');

			  if (filename)
			    ++filename;
			  else
			    filename = sym->file->name;
			}

		      printf (" (%s)", filename);
		      col += strlen (filename) + 3;
		    }
		}
	    }
	  else
	    {
	      if (bsd_style_output)
		{
		  printf ("%6.6s ", buf);
		  sprintf (buf, _("<cycle %d>"), sym->cg.cyc.num);
		  printf ("%-19.19s", buf);
		}
	      else
		{
		  col += strlen (buf);
		  for (; col < starting_col + 5; ++col)
		    putchar (' ');
		  printf (" %s ", buf);
		  sprintf (buf, _("<cycle %d>"), sym->cg.cyc.num);
		  printf ("%s", buf);
		  col += strlen (buf);
		}
	    }

	  starting_col += column_width;
	}

      printf ("\n");
    }

  free (name_sorted_syms);
}

/* Compare two arcs based on their usage counts.
   We want to sort in descending order.  */

static int
cmp_arc_count (const PTR left, const PTR right)
{
  const Arc **npp1 = (const Arc **) left;
  const Arc **npp2 = (const Arc **) right;

  if ((*npp1)->count > (*npp2)->count)
    return -1;
  else if ((*npp1)->count < (*npp2)->count)
    return 1;
  else
    return 0;
}

/* Compare two funtions based on their usage counts.
   We want to sort in descending order.  */

static int
cmp_fun_nuses (const PTR left, const PTR right)
{
  const Sym **npp1 = (const Sym **) left;
  const Sym **npp2 = (const Sym **) right;

  if ((*npp1)->nuses > (*npp2)->nuses)
    return -1;
  else if ((*npp1)->nuses < (*npp2)->nuses)
    return 1;
  else
    return 0;
}

/* Print a suggested function ordering based on the profiling data.

   We perform 4 major steps when ordering functions:

	* Group unused functions together and place them at the
	end of the function order.

	* Search the highest use arcs (those which account for 90% of
	the total arc count) for functions which have several parents.

	Group those with the most call sites together (currently the
	top 1.25% which have at least five different call sites).

	These are emitted at the start of the function order.

	* Use a greedy placement algorithm to place functions which
	occur in the top 99% of the arcs in the profile.  Some provisions
	are made to handle high usage arcs where the parent and/or
	child has already been placed.

	* Run the same greedy placement algorithm on the remaining
	arcs to place the leftover functions.


   The various "magic numbers" should (one day) be tuneable by command
   line options.  They were arrived at by benchmarking a few applications
   with various values to see which values produced better overall function
   orderings.

   Of course, profiling errors, machine limitations (PA long calls), and
   poor cutoff values for the placement algorithm may limit the usefullness
   of the resulting function order.  Improvements would be greatly appreciated.

   Suggestions:

	* Place the functions with many callers near the middle of the
	list to reduce long calls.

	* Propagate arc usage changes as functions are placed.  Ie if
	func1 and func2 are placed together, arcs to/from those arcs
	to the same parent/child should be combined, then resort the
	arcs to choose the next one.

	* Implement some global positioning algorithm to place the
	chains made by the greedy local positioning algorithm.  Probably
	by examining arcs which haven't been placed yet to tie two
	chains together.

	* Take a function's size and time into account in the algorithm;
	size in particular is important on the PA (long calls).  Placing
	many small functions onto their own page may be wise.

	* Use better profiling information; many published algorithms
	are based on call sequences through time, rather than just
	arc counts.

	* Prodecure cloning could improve performance when a small number
	of arcs account for most of the calls to a particular function.

	* Use relocation information to avoid moving unused functions
	completely out of the code stream; this would avoid severe lossage
	when the profile data bears little resemblance to actual runs.

	* Propagation of arc usages should also improve .o link line
	ordering which shares the same arc placement algorithm with
	the function ordering code (in fact it is a degenerate case
	of function ordering).  */

void
cg_print_function_ordering ()
{
  unsigned long index, used, unused, scratch_index;
  unsigned long  unplaced_arc_count, high_arc_count, scratch_arc_count;
#ifdef __GNUC__
  unsigned long long total_arcs, tmp_arcs_count;
#else
  unsigned long total_arcs, tmp_arcs_count;
#endif
  Sym **unused_syms, **used_syms, **scratch_syms;
  Arc **unplaced_arcs, **high_arcs, **scratch_arcs;

  index = 0;
  used = 0;
  unused = 0;
  scratch_index = 0;
  unplaced_arc_count = 0;
  high_arc_count = 0;
  scratch_arc_count = 0;

  /* First group all the unused functions together.  */
  unused_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *));
  used_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *));
  scratch_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *));
  high_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *));
  scratch_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *));
  unplaced_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *));

  /* Walk through all the functions; mark those which are never
     called as placed (we'll emit them as a group later).  */
  for (index = 0, used = 0, unused = 0; index < symtab.len; index++)
    {
      if (symtab.base[index].ncalls == 0)
	{
	  /* Filter out gprof generated names.  */
	  if (strcmp (symtab.base[index].name, "<locore>")
	      && strcmp (symtab.base[index].name, "<hicore>"))
	    {
	      unused_syms[unused++] = &symtab.base[index];
	      symtab.base[index].has_been_placed = 1;
	    }
	}
      else
	{
	  used_syms[used++] = &symtab.base[index];
	  symtab.base[index].has_been_placed = 0;
	  symtab.base[index].next = 0;
	  symtab.base[index].prev = 0;
	  symtab.base[index].nuses = 0;
	}
    }

  /* Sort the arcs from most used to least used.  */
  qsort (arcs, numarcs, sizeof (Arc *), cmp_arc_count);

  /* Compute the total arc count.  Also mark arcs as unplaced.

     Note we don't compensate for overflow if that happens!
     Overflow is much less likely when this file is compiled
     with GCC as it can double-wide integers via long long.  */
  total_arcs = 0;
  for (index = 0; index < numarcs; index++)
    {
      total_arcs += arcs[index]->count;
      arcs[index]->has_been_placed = 0;
    }

  /* We want to pull out those functions which are referenced
     by many highly used arcs and emit them as a group.  This
     could probably use some tuning.  */
  tmp_arcs_count = 0;
  for (index = 0; index < numarcs; index++)
    {
      tmp_arcs_count += arcs[index]->count;

      /* Count how many times each parent and child are used up
	 to our threshhold of arcs (90%).  */
      if ((double)tmp_arcs_count / (double)total_arcs > 0.90)
	break;

      arcs[index]->child->nuses++;
    }

  /* Now sort a temporary symbol table based on the number of
     times each function was used in the highest used arcs.  */
  memcpy (scratch_syms, used_syms, used * sizeof (Sym *));
  qsort (scratch_syms, used, sizeof (Sym *), cmp_fun_nuses);

  /* Now pick out those symbols we're going to emit as
     a group.  We take up to 1.25% of the used symbols.  */
  for (index = 0; index < used / 80; index++)
    {
      Sym *sym = scratch_syms[index];
      Arc *arc;

      /* If we hit symbols that aren't used from many call sites,
	 then we can quit.  We choose five as the low limit for
	 no particular reason.  */
      if (sym->nuses == 5)
	break;

      /* We're going to need the arcs between these functions.
	 Unfortunately, we don't know all these functions
	 until we're done.  So we keep track of all the arcs
	 to the functions we care about, then prune out those
	 which are uninteresting.

	 An interesting variation would be to quit when we found
	 multi-call site functions which account for some percentage
	 of the arcs.  */
      arc = sym->cg.children;

      while (arc)
	{
	  if (arc->parent != arc->child)
	    scratch_arcs[scratch_arc_count++] = arc;
	  arc->has_been_placed = 1;
	  arc = arc->next_child;
	}

      arc = sym->cg.parents;

      while (arc)
	{
	  if (arc->parent != arc->child)
	    scratch_arcs[scratch_arc_count++] = arc;
	  arc->has_been_placed = 1;
	  arc = arc->next_parent;
	}

      /* Keep track of how many symbols we're going to place.  */
      scratch_index = index;

      /* A lie, but it makes identifying
	 these functions easier later.  */
      sym->has_been_placed = 1;
    }

  /* Now walk through the temporary arcs and copy
     those we care about into the high arcs array.  */
  for (index = 0; index < scratch_arc_count; index++)
    {
      Arc *arc = scratch_arcs[index];

      /* If this arc refers to highly used functions, then
	 then we want to keep it.  */
      if (arc->child->has_been_placed
	  && arc->parent->has_been_placed)
	{
	  high_arcs[high_arc_count++] = scratch_arcs[index];

	  /* We need to turn of has_been_placed since we're going to
	     use the main arc placement algorithm on these arcs.  */
	  arc->child->has_been_placed = 0;
	  arc->parent->has_been_placed = 0;
	}
    }

  /* Dump the multi-site high usage functions which are not
     going to be ordered by the main ordering algorithm.  */
  for (index = 0; index < scratch_index; index++)
    {
      if (scratch_syms[index]->has_been_placed)
	printf ("%s\n", scratch_syms[index]->name);
    }

  /* Now we can order the multi-site high use
     functions based on the arcs between them.  */
  qsort (high_arcs, high_arc_count, sizeof (Arc *), cmp_arc_count);
  order_and_dump_functions_by_arcs (high_arcs, high_arc_count, 1,
				    unplaced_arcs, &unplaced_arc_count);

  /* Order and dump the high use functions left,
     these typically have only a few call sites.  */
  order_and_dump_functions_by_arcs (arcs, numarcs, 0,
				    unplaced_arcs, &unplaced_arc_count);

  /* Now place the rarely used functions.  */
  order_and_dump_functions_by_arcs (unplaced_arcs, unplaced_arc_count, 1,
				    scratch_arcs, &scratch_arc_count);

  /* Output any functions not emitted by the order_and_dump calls.  */
  for (index = 0; index < used; index++)
    if (used_syms[index]->has_been_placed == 0)
      printf("%s\n", used_syms[index]->name);

  /* Output the unused functions.  */
  for (index = 0; index < unused; index++)
    printf("%s\n", unused_syms[index]->name);

  unused_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *));
  used_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *));
  scratch_syms = (Sym **) xmalloc (symtab.len * sizeof (Sym *));
  high_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *));
  scratch_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *));
  unplaced_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *));

  free (unused_syms);
  free (used_syms);
  free (scratch_syms);
  free (high_arcs);
  free (scratch_arcs);
  free (unplaced_arcs);
}

/* Place functions based on the arcs in THE_ARCS with ARC_COUNT entries;
   place unused arcs into UNPLACED_ARCS/UNPLACED_ARC_COUNT.

   If ALL is nonzero, then place all functions referenced by THE_ARCS,
   else only place those referenced in the top 99% of the arcs in THE_ARCS.  */

#define MOST 0.99
static void
order_and_dump_functions_by_arcs (the_arcs, arc_count, all,
				  unplaced_arcs, unplaced_arc_count)
     Arc **the_arcs;
     unsigned long arc_count;
     int all;
     Arc **unplaced_arcs;
     unsigned long *unplaced_arc_count;
{
#ifdef __GNUC__
  unsigned long long tmp_arcs, total_arcs;
#else
  unsigned long tmp_arcs, total_arcs;
#endif
  unsigned int index;

  /* If needed, compute the total arc count.

     Note we don't compensate for overflow if that happens!  */
  if (! all)
    {
      total_arcs = 0;
      for (index = 0; index < arc_count; index++)
	total_arcs += the_arcs[index]->count;
    }
  else
    total_arcs = 0;

  tmp_arcs = 0;

  for (index = 0; index < arc_count; index++)
    {
      Sym *sym1, *sym2;
      Sym *child, *parent;

      tmp_arcs += the_arcs[index]->count;

      /* Ignore this arc if it's already been placed.  */
      if (the_arcs[index]->has_been_placed)
	continue;

      child = the_arcs[index]->child;
      parent = the_arcs[index]->parent;

      /* If we're not using all arcs, and this is a rarely used
	 arc, then put it on the unplaced_arc list.  Similarly
	 if both the parent and child of this arc have been placed.  */
      if ((! all && (double)tmp_arcs / (double)total_arcs > MOST)
	  || child->has_been_placed || parent->has_been_placed)
	{
	  unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[index];
	  continue;
	}

      /* If all slots in the parent and child are full, then there isn't
	 anything we can do right now.  We'll place this arc on the
	 unplaced arc list in the hope that a global positioning
	 algorithm can use it to place function chains.  */
      if (parent->next && parent->prev && child->next && child->prev)
	{
	  unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[index];
	  continue;
	}

      /* If the parent is unattached, then find the closest
	 place to attach it onto child's chain.   Similarly
	 for the opposite case.  */
      if (!parent->next && !parent->prev)
	{
	  int next_count = 0;
	  int prev_count = 0;
	  Sym *prev = child;
	  Sym *next = child;

	  /* Walk to the beginning and end of the child's chain.  */
	  while (next->next)
	    {
	      next = next->next;
	      next_count++;
	    }

	  while (prev->prev)
	    {
	      prev = prev->prev;
	      prev_count++;
	    }

	  /* Choose the closest.  */
	  child = next_count < prev_count ? next : prev;
	}
      else if (! child->next && !child->prev)
	{
	  int next_count = 0;
	  int prev_count = 0;
	  Sym *prev = parent;
	  Sym *next = parent;

	  while (next->next)
	    {
	      next = next->next;
	      next_count++;
	    }

	  while (prev->prev)
	    {
	      prev = prev->prev;
	      prev_count++;
	    }

	  parent = prev_count < next_count ? prev : next;
	}
      else
	{
	  /* Couldn't find anywhere to attach the functions,
	     put the arc on the unplaced arc list.  */
	  unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[index];
	  continue;
	}

      /* Make sure we don't tie two ends together.  */
      sym1 = parent;
      if (sym1->next)
	while (sym1->next)
	  sym1 = sym1->next;
      else
	while (sym1->prev)
	  sym1 = sym1->prev;

      sym2 = child;
      if (sym2->next)
	while (sym2->next)
	  sym2 = sym2->next;
      else
	while (sym2->prev)
	  sym2 = sym2->prev;

      if (sym1 == child
	  && sym2 == parent)
	{
	  /* This would tie two ends together.  */
	  unplaced_arcs[(*unplaced_arc_count)++] = the_arcs[index];
	  continue;
	}

      if (parent->next)
	{
	  /* Must attach to the parent's prev field.  */
	  if (! child->next)
	    {
	      /* parent-prev and child-next */
	      parent->prev = child;
	      child->next = parent;
	      the_arcs[index]->has_been_placed = 1;
	    }
	}
      else if (parent->prev)
	{
	  /* Must attach to the parent's next field.  */
	  if (! child->prev)
	    {
	      /* parent-next and child-prev */
	      parent->next = child;
	      child->prev = parent;
	      the_arcs[index]->has_been_placed = 1;
	    }
	}
      else
	{
	  /* Can attach to either field in the parent, depends
	     on where we've got space in the child.  */
	  if (child->prev)
	    {
	      /* parent-prev and child-next.  */
	      parent->prev = child;
	      child->next = parent;
	      the_arcs[index]->has_been_placed = 1;
	    }
	  else
	    {
	      /* parent-next and child-prev.  */
	      parent->next = child;
	      child->prev = parent;
	      the_arcs[index]->has_been_placed = 1;
	    }
	}
    }

  /* Dump the chains of functions we've made.  */
  for (index = 0; index < arc_count; index++)
    {
      Sym *sym;
      if (the_arcs[index]->parent->has_been_placed
	  || the_arcs[index]->child->has_been_placed)
	continue;

      sym = the_arcs[index]->parent;

      /* If this symbol isn't attached to any other
	 symbols, then we've got a rarely used arc.

	 Skip it for now, we'll deal with them later.  */
      if (sym->next == NULL
	  && sym->prev == NULL)
	continue;

      /* Get to the start of this chain.  */
      while (sym->prev)
	sym = sym->prev;

      while (sym)
	{
	  /* Mark it as placed.  */
	  sym->has_been_placed = 1;
	  printf ("%s\n", sym->name);
	  sym = sym->next;
	}
    }

  /* If we want to place all the arcs, then output
     those which weren't placed by the main algorithm.  */
  if (all)
    for (index = 0; index < arc_count; index++)
      {
	Sym *sym;
	if (the_arcs[index]->parent->has_been_placed
	    || the_arcs[index]->child->has_been_placed)
	  continue;

	sym = the_arcs[index]->parent;

	sym->has_been_placed = 1;
	printf ("%s\n", sym->name);
      }
}

/* Print a suggested .o ordering for files on a link line based
   on profiling information.  This uses the function placement
   code for the bulk of its work.  */

void
cg_print_file_ordering ()
{
  unsigned long scratch_arc_count, index;
  Arc **scratch_arcs;
  char *last;

  scratch_arc_count = 0;

  scratch_arcs = (Arc **) xmalloc (numarcs * sizeof (Arc *));
  for (index = 0; index < numarcs; index++)
    {
      if (! arcs[index]->parent->mapped
	  || ! arcs[index]->child->mapped)
	arcs[index]->has_been_placed = 1;
    }

  order_and_dump_functions_by_arcs (arcs, numarcs, 0,
				    scratch_arcs, &scratch_arc_count);

  /* Output .o's not handled by the main placement algorithm.  */
  for (index = 0; index < symtab.len; index++)
    {
      if (symtab.base[index].mapped
	  && ! symtab.base[index].has_been_placed)
	printf ("%s\n", symtab.base[index].name);
    }

  /* Now output any .o's that didn't have any text symbols.  */
  last = NULL;
  for (index = 0; index < symbol_map_count; index++)
    {
      unsigned int index2;

      /* Don't bother searching if this symbol
	 is the same as the previous one.  */
      if (last && !strcmp (last, symbol_map[index].file_name))
	continue;

      for (index2 = 0; index2 < symtab.len; index2++)
	{
	  if (! symtab.base[index2].mapped)
	    continue;

	  if (!strcmp (symtab.base[index2].name, symbol_map[index].file_name))
	    break;
	}

      /* If we didn't find it in the symbol table, then it must
	 be a .o with no text symbols.  Output it last.  */
      if (index2 == symtab.len)
	printf ("%s\n", symbol_map[index].file_name);
      last = symbol_map[index].file_name;
    }
}