aboutsummaryrefslogtreecommitdiff
path: root/gdb/proc-api.c
blob: 986691dc83ddda970895486287ef4aa299fd251f (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
/* Machine independent support for SVR4 /proc (process file system) for GDB.
   Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
   Written by Michael Snyder at Cygnus Solutions.
   Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.

This file is part of GDB.

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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

/*
 * Pretty-print trace of api calls to the /proc api
 * (ioctl or read/write calls).
 * 
 */

#include "defs.h"
#include "gdbcmd.h"
#include "completer.h"

#if defined (NEW_PROC_API)
#define _STRUCTURED_PROC 1
#endif

#include <stdio.h>
#include <sys/types.h>
#include <sys/procfs.h>
#include <sys/proc.h>	/* for struct proc */
#ifdef HAVE_SYS_USER_H
#include <sys/user.h>	/* for struct user */
#endif
#include <fcntl.h>	/* for O_RDWR etc. */
#include <sys/wait.h>

#include "proc-utils.h"

/*  Much of the information used in the /proc interface, particularly for
    printing status information, is kept as tables of structures of the
    following form.  These tables can be used to map numeric values to
    their symbolic names and to a string that describes their specific use. */

struct trans {
  long value;                   /* The numeric value */
  char *name;                   /* The equivalent symbolic value */
  char *desc;                   /* Short description of value */
};

static int   procfs_trace    = 0;
static FILE *procfs_file     = NULL;
static char *procfs_filename = "procfs_trace";

static void
prepare_to_trace (void)
{
  if (procfs_trace)			/* if procfs tracing turned on */
    if (procfs_file == NULL)		/* if output file not yet open */
      if (procfs_filename != NULL)	/* if output filename known */
	procfs_file = fopen (procfs_filename, "a");	/* open output file */
}

static void
set_procfs_trace_cmd (char *args, int from_tty, struct cmd_list_element *c)
{
#if 0	/* not sure what I might actually need to do here, if anything */
  if (procfs_file)
    fflush (procfs_file);
#endif
}

static void
set_procfs_file_cmd (char *args, int from_tty, struct cmd_list_element *c)
{
  /* Just changed the filename for procfs tracing.
     If a file was already open, close it.  */
  if (procfs_file)
    fclose (procfs_file);
  procfs_file = NULL;
}


#ifndef NEW_PROC_API

static struct trans ioctl_table[] = {
#ifdef PIOCACINFO			/* irix */
  { PIOCACINFO,    "PIOCACINFO",   "get process account info" },
#endif
  { PIOCACTION,    "PIOCACTION",   "get signal action structs" },
#ifdef PIOCARGUMENTS			/* osf */
  { PIOCARGUMENTS, "PIOCARGUMENTS", "command line args" },
#endif
#ifdef PIOCAUXV				/* solaris aux vectors */
  { PIOCAUXV,      "PIOCAUXV",     "get aux vector" },
  { PIOCNAUXV,     "PIOCNAUXV",    "get number of aux vector entries" },
#endif /* AUXV */
  { PIOCCFAULT,    "PIOCCFAULT",   "clear current fault" },
  { PIOCCRED,      "PIOCCRED",     "get process credentials" },
#ifdef PIOCENEVCTRS			/* irix event counters */
  { PIOCENEVCTRS,    "PIOCENEVCTRS",    "acquire and start event counters" },
  { PIOCGETEVCTRL,   "PIOCGETEVCTRL",   "get control info of event counters" },
  { PIOCGETEVCTRS,   "PIOCGETEVCTRS",   "dump event counters" },
  { PIOCGETPREVCTRS, "PIOCGETPREVCTRS", "dump event counters & prusage info" },
  { PIOCRELEVCTRS,   "PIOCRELEVCTRS",   "release/stop event counters" },
  { PIOCSETEVCTRL,   "PIOCSETEVCTRL",   "set control info of event counters" },
  { PIOCGETPTIMER,   "PIOCGETPTIMER",   "get process timers" },
#endif	/* irix event counters */
  { PIOCGENTRY,    "PIOCGENTRY",   "get traced syscall entry set" },
#if defined (PIOCGETPR)
  { PIOCGETPR,     "PIOCGETPR",    "read struct proc" },
#endif
#if defined (PIOCGETU)
  { PIOCGETU,      "PIOCGETU",     "read user area" },
#endif
#if defined (PIOCGETUTK) && (defined(KERNEL) || defined(SHOW_UTT)) /* osf */
  { PIOCGETUTK,  "PIOCGETUTK", "get the utask struct" },
#endif
  { PIOCGEXIT,     "PIOCGEXIT",    "get traced syscall exit  set" },
  { PIOCGFAULT,    "PIOCGFAULT",   "get traced fault set" },
#ifdef PIOCGFPCR			/* osf */
  { PIOCGFPCR,     "PIOCGFPCR",    "get FP control register" },
  { PIOCSFPCR,     "PIOCSFPCR",    "set FP conrtol register" },
#endif
  { PIOCGFPREG,    "PIOCGFPREG",   "get floating point registers" },
  { PIOCGHOLD,     "PIOCGHOLD",    "get held signal set" },
  { PIOCGREG,      "PIOCGREG",     "get general registers" },
  { PIOCGROUPS,    "PIOCGROUPS",   "get supplementary groups" },
#ifdef PIOCGSPCACT			/* osf */
  { PIOCGSPCACT,   "PIOCGSPCACT",  "get special action" },
  { PIOCSSPCACT,   "PIOCSSPCACT",  "set special action" },
#endif
  { PIOCGTRACE,    "PIOCGTRACE",   "get traced signal set" },
#ifdef PIOCGWATCH			/* irix watchpoints */
  { PIOCGWATCH,    "PIOCGWATCH",   "get watchpoint" },
  { PIOCSWATCH,    "PIOCSWATCH",   "set watchpoint" },
  { PIOCNWATCH,    "PIOCNWATCH",   "get number of watchpoints" },
#endif	/* irix watchpoints */
#ifdef PIOCGWIN				/* solaris sparc */
  { PIOCGWIN,      "PIOCGWIN",     "get gwindows_t" },
#endif
#ifdef PIOCGXREG			/* solaris sparc extra regs */
  { PIOCGXREGSIZE, "PIOCXREGSIZE", "get extra register state size" },
  { PIOCGXREG,     "PIOCGXREG",    "get extra register state" },
  { PIOCSXREG,     "PIOCSXREG",    "set extra register state" },
#endif /* XREG */
  { PIOCKILL,      "PIOCKILL",     "send signal" },
#ifdef PIOCLDT				/* solaris i386 */
  { PIOCLDT,       "PIOCLDT",      "get LDT" },
  { PIOCNLDT,      "PIOCNLDT",     "get number of LDT entries" },
#endif
#ifdef PIOCLSTATUS			/* solaris and unixware */
  { PIOCLSTATUS,   "PIOCLSTATUS",  "get status of all lwps" },
  { PIOCLUSAGE,    "PIOCLUSAGE",   "get resource usage of all lwps" },
  { PIOCOPENLWP,   "PIOCOPENLWP",  "get lwp file descriptor" },
  { PIOCLWPIDS,    "PIOCLWPIDS",   "get lwp identifiers" },
#endif /* LWP */
  { PIOCMAP,       "PIOCMAP",      "get memory map information" },
  { PIOCMAXSIG,    "PIOCMAXSIG",   "get max signal number" },
  { PIOCNICE,      "PIOCNICE",     "set nice priority" },
  { PIOCNMAP,      "PIOCNMAP",     "get number of memory mappings" },
  { PIOCOPENM,     "PIOCOPENM",    "open mapped object for reading" },
#ifdef PIOCOPENMOBS			/* osf */
  { PIOCOPENMOBS,  "PIOCOPENMOBS", "open mapped object" },
#endif
#ifdef PIOCOPENPD	/* solaris */
  { PIOCOPENPD,    "PIOCOPENPD",   "get page data file descriptor" },
#endif
  { PIOCPSINFO,    "PIOCPSINFO",   "get ps(1) information" },
  { PIOCRESET,     "PIOCRESET",    "reset process flags" },
  { PIOCRFORK,     "PIOCRFORK",    "reset inherit-on-fork flag" },
  { PIOCRRLC,      "PIOCRRLC",     "reset run-on-last-close flag" },
  { PIOCRUN,       "PIOCRUN",      "make process runnable" },
#ifdef PIOCSAVECCNTRS			/* irix */
  { PIOCSAVECCNTRS, "PIOCSAVECCNTRS", "parent gets child cntrs" },
#endif
  { PIOCSENTRY,    "PIOCSENTRY",   "set traced syscall entry set" },
  { PIOCSET,       "PIOCSET",      "set process flags" },
  { PIOCSEXIT,     "PIOCSEXIT",    "set traced syscall exit  set" },
  { PIOCSFAULT,    "PIOCSFAULT",   "set traced fault set" },
  { PIOCSFORK,     "PIOCSFORK",    "set inherit-on-fork flag" },
  { PIOCSFPREG,    "PIOCSFPREG",   "set floating point registers" },
  { PIOCSHOLD,     "PIOCSHOLD",    "set held signal set" },
  { PIOCSREG,      "PIOCSREG",     "set general registers" },
  { PIOCSRLC,      "PIOCSRLC",     "set run-on-last-close flag" },
  { PIOCSSIG,      "PIOCSSIG",     "set current signal" },
  { PIOCSTATUS,    "PIOCSTATUS",   "get process status" },
  { PIOCSTOP,      "PIOCSTOP",     "post stop request" },
  { PIOCSTRACE,    "PIOCSTRACE",   "set traced signal set" },
  { PIOCUNKILL,    "PIOCUNKILL",   "delete a signal" },
#ifdef PIOCUSAGE	/* solaris */
  { PIOCUSAGE,     "PIOCUSAGE",    "get resource usage" },
#endif
  { PIOCWSTOP,     "PIOCWSTOP",    "wait for process to stop" },

#ifdef PIOCNTHR				/* osf threads */
  { PIOCNTHR,      "PIOCNTHR",     "get thread count" },
  { PIOCRTINH,     "PIOCRTINH",    "reset inherit-on-thread-creation" },
  { PIOCSTINH,     "PIOCSTINH",    "set   inherit-on-thread-creation" },
  { PIOCTLIST,     "PIOCTLIST",    "get thread ids" },
  { PIOCXPTH,      "PIOCXPTH",     "translate port to thread handle" },
  { PIOCTRUN,      "PIOCTRUN",     "make thread runnable" },
  { PIOCTSTATUS,   "PIOCTSTATUS",  "get thread status" },
  { PIOCTSTOP,     "PIOCTSTOP",    "stop a thread" },
  /* ... TGTRACE TSTRACE TSSIG TKILL TUNKILL TCFAULT TGFAULT TSFAULT
     TGFPREG TSFPREG TGREG TSREG TACTION TTERM TABRUN TGENTRY TSENTRY
     TGEXIT TSEXIT TSHOLD ... thread functions */
#endif /* osf threads */
  { -1,            NULL,           NULL }
};

int
ioctl_with_trace (int fd, long opcode, void *ptr, char *file, int line)
{
  int i = 0;
  int ret;
  int arg1;

  prepare_to_trace ();

  if (procfs_trace)
    {
      for (i = 0; ioctl_table[i].name != NULL; i++)
	if (ioctl_table[i].value == opcode)
	  break;

      if (info_verbose)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "%s:%d -- ", file, line);
      switch (opcode) {
      case PIOCSET:
	arg1 = ptr ? *(long *) ptr : 0;
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (PIOCSET,   %s) %s\n", 
		 arg1 == PR_FORK  ? "PR_FORK"  :
		 arg1 == PR_RLC   ? "PR_RLC"   :
#ifdef PR_ASYNC
		 arg1 == PR_ASYNC ? "PR_ASYNC" :
#endif
		 "<unknown flag>",
		 info_verbose ? ioctl_table[i].desc : "");
	break;
      case PIOCRESET:
	arg1 = ptr ? *(long *) ptr : 0;
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (PIOCRESET, %s) %s\n", 
		 arg1 == PR_FORK  ? "PR_FORK"  :
		 arg1 == PR_RLC   ? "PR_RLC"   :
#ifdef PR_ASYNC
		 arg1 == PR_ASYNC ? "PR_ASYNC" :
#endif
		 "<unknown flag>",
		 info_verbose ? ioctl_table[i].desc : "");
	break;
      case PIOCSTRACE:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (PIOCSTRACE) ");
	proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,
				     (sigset_t *) ptr, 0);
	break;
      case PIOCSFAULT:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (%s) ", 
		 opcode == PIOCSFAULT ? "PIOCSFAULT" : "PIOCGFAULT");
	proc_prettyfprint_faultset (procfs_file ? procfs_file : stdout,
				    (fltset_t *) ptr, 0);
	break;
      case PIOCSENTRY:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (%s) ", 
		 opcode == PIOCSENTRY ? "PIOCSENTRY" : "PIOCGENTRY");
	proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,
				    (sysset_t *) ptr, 0);
	break;
      case PIOCSEXIT:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (%s) ", 
		 opcode == PIOCSEXIT ? "PIOCSEXIT" : "PIOCGEXIT");
	proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,
				    (sysset_t *) ptr, 0);
	break;
      case PIOCSHOLD:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (%s) ", 
		 opcode == PIOCSHOLD ? "PIOCSHOLD" : "PIOCGHOLD");
	proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,
				     (sigset_t *) ptr, 0);
	break;
      case PIOCSSIG:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (PIOCSSIG) ");
	proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,
				  ptr ? ((siginfo_t *) ptr)->si_signo : 0, 
				  0);
	fprintf (procfs_file ? procfs_file : stdout, "\n");
	break;
      case PIOCRUN:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (PIOCRUN) ");
	
	arg1 = ptr ? *(long *) ptr : 0;
	if (arg1 & PRCSIG)
	  fprintf (procfs_file ? procfs_file : stdout, "clearSig ");
	if (arg1 & PRCFAULT)
	  fprintf (procfs_file ? procfs_file : stdout, "clearFlt ");
	if (arg1 & PRSTRACE)
	  fprintf (procfs_file ? procfs_file : stdout, "setTrace ");
	if (arg1 & PRSHOLD)
	  fprintf (procfs_file ? procfs_file : stdout, "setHold ");
	if (arg1 & PRSFAULT)
	  fprintf (procfs_file ? procfs_file : stdout, "setFlt ");
	if (arg1 & PRSVADDR)
	  fprintf (procfs_file ? procfs_file : stdout, "setVaddr ");
	if (arg1 & PRSTEP)
	  fprintf (procfs_file ? procfs_file : stdout, "step ");
	if (arg1 & PRSABORT)
	  fprintf (procfs_file ? procfs_file : stdout, "syscallAbort ");
	if (arg1 & PRSTOP)
	  fprintf (procfs_file ? procfs_file : stdout, "stopReq ");
	  
	fprintf (procfs_file ? procfs_file : stdout, "\n");
	break;
      case PIOCKILL:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (PIOCKILL) ");
	proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,
				  ptr ? *(long *) ptr : 0, 0);
	fprintf (procfs_file ? procfs_file : stdout, "\n");
	break;
#ifdef PIOCSSPCACT
      case PIOCSSPCACT:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "ioctl (PIOCSSPCACT) ");
	arg1 = ptr ? *(long *) ptr : 0;
	if (arg1 & PRFS_STOPFORK)
	  fprintf (procfs_file ? procfs_file : stdout, "stopFork ");
	if (arg1 & PRFS_STOPEXEC)
	  fprintf (procfs_file ? procfs_file : stdout, "stopExec ");
	if (arg1 & PRFS_STOPTERM)
	  fprintf (procfs_file ? procfs_file : stdout, "stopTerm ");
	if (arg1 & PRFS_STOPTCR)
	  fprintf (procfs_file ? procfs_file : stdout, "stopThreadCreate ");
	if (arg1 & PRFS_STOPTTERM)
	  fprintf (procfs_file ? procfs_file : stdout, "stopThreadTerm ");
	if (arg1 & PRFS_KOLC)
	  fprintf (procfs_file ? procfs_file : stdout, "killOnLastClose ");
	fprintf (procfs_file ? procfs_file : stdout, "\n");
	break;
#endif /* PIOCSSPCACT */
      default:
	if (ioctl_table[i].name)
	  fprintf (procfs_file ? procfs_file : stdout, 
		   "ioctl (%s) %s\n", 
		   ioctl_table[i].name,
		   info_verbose ? ioctl_table[i].desc : "");
	else
	  fprintf (procfs_file ? procfs_file : stdout, 
		   "ioctl (<unknown %ld (0x%lx)) \n", opcode, opcode);
	break;
      }
      if (procfs_file)
	fflush (procfs_file);
    }
  errno = 0;
  ret = ioctl (fd, opcode, ptr);
  if (procfs_trace && ret < 0)
    {
      fprintf (procfs_file ? procfs_file : stdout, 
	       "[ioctl (%s) FAILED! (%s)]\n",
	       ioctl_table[i].name != NULL ? 
	       ioctl_table[i].name : "<unknown>",
	       safe_strerror (errno));
      if (procfs_file)
	fflush (procfs_file);
    }

  return ret;
}

#else	/* NEW_PROC_API */

static struct trans rw_table[] = {
#ifdef PCAGENT			/* solaris */
  { PCAGENT,  "PCAGENT",  "create agent lwp with regs from argument" },
#endif
  { PCCFAULT, "PCCFAULT", "clear current fault" },
#ifdef PCCSIG			/* solaris */
  { PCCSIG,   "PCCSIG",   "clear current signal" },
#endif
  { PCDSTOP,  "PCDSTOP",  "post stop request" },
  { PCKILL,   "PCKILL",   "post a signal" },
  { PCNICE,   "PCNICE",   "set nice priority" },
#ifdef PCREAD			/* solaris */
  { PCREAD,   "PCREAD",   "read from the address space" },
  { PCWRITE,  "PCWRITE",  "write to the address space" },
#endif
#ifdef PCRESET			/* unixware */
  { PCRESET,  "PCRESET",  "unset modes" },
#endif
  { PCRUN,    "PCRUN",    "make process/lwp runnable" },
#ifdef PCSASRS			/* solaris 2.7 only */
  { PCSASRS,  "PCSASRS",  "set ancillary state registers" },
#endif
#ifdef PCSCRED			/* solaris */
  { PCSCRED,  "PCSCRED",  "set process credentials" },
#endif
  { PCSENTRY, "PCSENTRY", "set traced syscall entry set" },
  { PCSET,    "PCSET",    "set modes" },
  { PCSEXIT,  "PCSEXIT",  "set traced syscall exit  set" },
  { PCSFAULT, "PCSFAULT", "set traced fault set" },
  { PCSFPREG, "PCSFPREG", "set floating point registers" },
  { PCSHOLD,  "PCSHOLD",  "set signal mask" },
  { PCSREG,   "PCSREG",   "set general registers" },
  { PCSSIG,   "PCSSIG",   "set current signal" },
  { PCSTOP,   "PCSTOP",   "post stop request and wait" },
  { PCSTRACE, "PCSTRACE", "set traced signal set" },
#ifdef PCSVADDR			/* solaris */
  { PCSVADDR, "PCSVADDR", "set pc virtual address" },
#endif
#ifdef PCSXREG			/* solaris sparc only */
  { PCSXREG,  "PCSXREG",  "set extra registers" },
#endif
#ifdef PCTWSTOP			/* solaris */
  { PCTWSTOP, "PCTWSTOP", "wait for stop, with timeout arg" },
#endif
  { PCUNKILL, "PCUNKILL", "delete a pending signal" },
#ifdef PCUNSET			/* solaris */
  { PCUNSET,  "PCUNSET",  "unset modes" },
#endif
#ifdef PCWATCH			/* solaris */
  { PCWATCH,  "PCWATCH",  "set/unset watched memory area" },
#endif
  { PCWSTOP,  "PCWSTOP",  "wait for process/lwp to stop, no timeout" },
  { 0,        NULL,      NULL }
};

static off_t lseek_offset;

int
write_with_trace (int fd, void *varg, size_t len, char *file, int line)
{
  int  i;
  int ret;
  procfs_ctl_t *arg = (procfs_ctl_t *) varg;

  prepare_to_trace ();
  if (procfs_trace)
    {
      procfs_ctl_t opcode = arg[0];
      for (i = 0; rw_table[i].name != NULL; i++)
	if (rw_table[i].value == opcode)
	  break;

      if (info_verbose)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "%s:%d -- ", file, line);
      switch (opcode) {
      case PCSET:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCSET,   %s) %s\n", 
		 arg[1] == PR_FORK  ? "PR_FORK"  :
		 arg[1] == PR_RLC   ? "PR_RLC"   :
#ifdef PR_ASYNC
		 arg[1] == PR_ASYNC ? "PR_ASYNC" :
#endif
		 "<unknown flag>",
		 info_verbose ? rw_table[i].desc : "");
	break;
#ifdef PCUNSET
      case PCUNSET:
#endif
#ifdef PCRESET
#if PCRESET != PCUNSET
      case PCRESET:
#endif
#endif
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCRESET, %s) %s\n", 
		 arg[1] == PR_FORK  ? "PR_FORK"  :
		 arg[1] == PR_RLC   ? "PR_RLC"   :
#ifdef PR_ASYNC
		 arg[1] == PR_ASYNC ? "PR_ASYNC" :
#endif
		 "<unknown flag>",
		 info_verbose ? rw_table[i].desc : "");
	break;
      case PCSTRACE:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCSTRACE) ");
	proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,
				     (sigset_t *) &arg[1], 0);
	break;
      case PCSFAULT:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCSFAULT) ");
	proc_prettyfprint_faultset (procfs_file ? procfs_file : stdout,
				    (fltset_t *) &arg[1], 0);
	break;
      case PCSENTRY:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCSENTRY) ");
	proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,
				    (sysset_t *) &arg[1], 0);
	break;
      case PCSEXIT:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCSEXIT) ");
	proc_prettyfprint_syscalls (procfs_file ? procfs_file : stdout,
				    (sysset_t *) &arg[1], 0);
	break;
      case PCSHOLD:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCSHOLD) ");
	proc_prettyfprint_signalset (procfs_file ? procfs_file : stdout,
				     (sigset_t *) &arg[1], 0);
	break;
      case PCSSIG:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCSSIG) ");
	proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,
				  arg[1] ? ((siginfo_t *) &arg[1])->si_signo 
				         : 0, 
				  0);
	fprintf (procfs_file ? procfs_file : stdout, "\n");
	break;
      case PCRUN:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCRUN) ");
	if (arg[1] & PRCSIG)
	  fprintf (procfs_file ? procfs_file : stdout, "clearSig ");
	if (arg[1] & PRCFAULT)
	  fprintf (procfs_file ? procfs_file : stdout, "clearFlt ");
	if (arg[1] & PRSTEP)
	  fprintf (procfs_file ? procfs_file : stdout, "step ");
	if (arg[1] & PRSABORT)
	  fprintf (procfs_file ? procfs_file : stdout, "syscallAbort ");
	if (arg[1] & PRSTOP)
	  fprintf (procfs_file ? procfs_file : stdout, "stopReq ");
	  
	fprintf (procfs_file ? procfs_file : stdout, "\n");
	break;
      case PCKILL:
	fprintf (procfs_file ? procfs_file : stdout, 
		 "write (PCKILL) ");
	proc_prettyfprint_signal (procfs_file ? procfs_file : stdout,
				  arg[1], 0);
	fprintf (procfs_file ? procfs_file : stdout, "\n");
	break;
      default:
	{
#ifdef BREAKPOINT
	  static unsigned char break_insn[] = BREAKPOINT;

	  if (len == sizeof (break_insn) &&
	      memcmp (arg, &break_insn, len) == 0)
	    fprintf (procfs_file ? procfs_file : stdout, 
		     "write (<breakpoint at 0x%08lx>) \n", 
		     (unsigned long) lseek_offset);
	  else 
#endif
	  if (rw_table[i].name)
	    fprintf (procfs_file ? procfs_file : stdout, 
		     "write (%s) %s\n", 
		     rw_table[i].name, 
		     info_verbose ? rw_table[i].desc : "");
	  else
	    {
	      if (lseek_offset != -1)
		fprintf (procfs_file ? procfs_file : stdout, 
			 "write (<unknown>, %lud bytes at 0x%08lx) \n", 
			 (unsigned long) len, (unsigned long) lseek_offset);
	      else
		fprintf (procfs_file ? procfs_file : stdout, 
			 "write (<unknown>, %lud bytes) \n", 
			 (unsigned long) len);
	    }
	  break;
	}
      }
      if (procfs_file)
	fflush (procfs_file);
    }
  errno = 0;
  ret = write (fd, (void *) arg, len);
  if (procfs_trace && ret != len)
    {
      fprintf (procfs_file ? procfs_file : stdout, 
	       "[write (%s) FAILED! (%s)]\n",
	       rw_table[i].name != NULL ? 
	       rw_table[i].name : "<unknown>", 
	       safe_strerror (errno));
      if (procfs_file)
	fflush (procfs_file);
    }

  lseek_offset = -1;
  return ret;
}

off_t
lseek_with_trace (int fd, off_t offset, int whence, char *file, int line)
{
  off_t ret;

  prepare_to_trace ();
  errno = 0;
  ret = lseek (fd, offset, whence);
  lseek_offset = ret;
  if (procfs_trace && (ret == -1 || errno != 0))
    {
      fprintf (procfs_file ? procfs_file : stdout, 
	       "[lseek (0x%08lx) FAILED! (%s)]\n", 
	       (unsigned long) offset, safe_strerror (errno));
      if (procfs_file)
	fflush (procfs_file);
    }

  return ret;
}

#endif /* NEW_PROC_API */

int
open_with_trace (char *filename, int mode, char *file, int line)
{
  int ret;

  prepare_to_trace ();
  errno = 0;
  ret = open (filename, mode);
  if (procfs_trace)
    {
      if (info_verbose)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "%s:%d -- ", file, line);

      if (errno)
	{
	  fprintf (procfs_file ? procfs_file : stdout, 
		   "[open FAILED! (%s) line %d]\\n", 
		   safe_strerror (errno), line);
	}
      else
	{
	  fprintf (procfs_file ? procfs_file : stdout, 
		   "%d = open (%s, ", ret, filename);
	  if (mode == O_RDONLY)
	    fprintf (procfs_file ? procfs_file : stdout, "O_RDONLY) %d\n",
		     line);
	  else if (mode == O_WRONLY)
	    fprintf (procfs_file ? procfs_file : stdout, "O_WRONLY) %d\n",
		     line);
	  else if (mode == O_RDWR)
	    fprintf (procfs_file ? procfs_file : stdout, "O_RDWR)   %d\n",
		     line);
	}
      if (procfs_file)
	fflush (procfs_file);
    }

  return ret;
}

int
close_with_trace (int fd, char *file, int line)
{
  int ret;

  prepare_to_trace ();
  errno = 0;
  ret = close (fd);
  if (procfs_trace)
    {
      if (info_verbose)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "%s:%d -- ", file, line);
      if (errno)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "[close FAILED! (%s)]\n", safe_strerror (errno));
      else
	fprintf (procfs_file ? procfs_file : stdout, 
		 "%d = close (%d)\n", ret, fd);
      if (procfs_file)
	fflush (procfs_file);
    }

  return ret;
}

pid_t
wait_with_trace (int *wstat, char *file, int line)
{
  int ret, lstat = 0;

  prepare_to_trace ();
  if (procfs_trace)
    {
      if (info_verbose)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "%s:%d -- ", file, line);
      fprintf (procfs_file ? procfs_file : stdout, 
	       "wait (line %d) ", line);
      if (procfs_file)
	fflush (procfs_file);
    }
  errno = 0;
  ret = wait (&lstat);
  if (procfs_trace)
    {
      if (errno)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "[wait FAILED! (%s)]\n", safe_strerror (errno));
      else
	fprintf (procfs_file ? procfs_file : stdout, 
		 "returned pid %d, status 0x%x\n", ret, lstat);
      if (procfs_file)
	fflush (procfs_file);
    }
  if (wstat)
    *wstat = lstat;

  return ret;
}

void
procfs_note (char *msg, char *file, int line)
{
  prepare_to_trace ();
  if (procfs_trace)
    {
      if (info_verbose)
	fprintf (procfs_file ? procfs_file : stdout, 
		 "%s:%d -- ", file, line);
      fprintf (procfs_file ? procfs_file : stdout, msg);
      if (procfs_file)
	fflush (procfs_file);
    }
}

void
proc_prettyfprint_status (long flags, int why, int what, int thread)
{
  prepare_to_trace ();
  if (procfs_trace)
    {
      if (thread)
	fprintf (procfs_file ? procfs_file : stdout,
		 "Thread %d: ", thread);

      proc_prettyfprint_flags (procfs_file ? procfs_file : stdout, 
			       flags, 0);

      if (flags & (PR_STOPPED | PR_ISTOP))
	proc_prettyfprint_why (procfs_file ? procfs_file : stdout, 
			       why, what, 0);
      if (procfs_file)
	fflush (procfs_file);
    }
}


void
_initialize_proc_api (void)
{
  struct cmd_list_element *c;

  c = add_set_cmd ("procfs-trace", no_class,
		   var_boolean, (char *) &procfs_trace, 
		   "Set tracing for /proc api calls.\n", &setlist);

  add_show_from_set (c, &showlist);
  set_cmd_sfunc (c, set_procfs_trace_cmd);
  c->completer = filename_completer;

  c = add_set_cmd ("procfs-file", no_class, var_filename,
		   (char *) &procfs_filename, 
		   "Set filename for /proc tracefile.\n", &setlist);

  add_show_from_set (c, &showlist);
  set_cmd_sfunc (c, set_procfs_file_cmd);
}