aboutsummaryrefslogtreecommitdiff
path: root/gdb/skip.c
blob: 0c002ff5687a8caf769f7b51843182c7738d6c9e (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
/* Skipping uninteresting files and functions while stepping.

   Copyright (C) 2011-2013 Free Software Foundation, Inc.

   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, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "skip.h"
#include "value.h"
#include "valprint.h"
#include "ui-out.h"
#include "gdb_string.h"
#include "symtab.h"
#include "gdbcmd.h"
#include "command.h"
#include "completer.h"
#include "stack.h"
#include "cli/cli-utils.h"
#include "arch-utils.h"
#include "linespec.h"
#include "objfiles.h"
#include "exceptions.h"
#include "breakpoint.h" /* for get_sal_arch () */
#include "source.h"
#include "filenames.h"

struct skiplist_entry
{
  int number;

  /* NULL if this isn't a skiplist entry for an entire file.
     The skiplist entry owns this pointer.  */
  char *filename;

  /* The name of the marked-for-skip function, if this is a skiplist
     entry for a function.
     The skiplist entry owns this pointer.  */
  char *function_name;

  int enabled;

  struct skiplist_entry *next;
};

static void add_skiplist_entry (struct skiplist_entry *e);
static void skip_function (const char *name);

static struct skiplist_entry *skiplist_entry_chain;
static int skiplist_entry_count;

#define ALL_SKIPLIST_ENTRIES(E) \
  for (E = skiplist_entry_chain; E; E = E->next)

#define ALL_SKIPLIST_ENTRIES_SAFE(E,TMP) \
  for (E = skiplist_entry_chain;         \
       E ? (TMP = E->next, 1) : 0;       \
       E = TMP)

static void
skip_file_command (char *arg, int from_tty)
{
  struct skiplist_entry *e;
  struct symtab *symtab;
  const char *filename = NULL;

  /* If no argument was given, try to default to the last
     displayed codepoint.  */
  if (arg == NULL)
    {
      symtab = get_last_displayed_symtab ();
      if (symtab == NULL)
	error (_("No default file now."));

      /* It is not a typo, symtab_to_filename_for_display woule be needlessly
	 ambiguous.  */
      filename = symtab_to_fullname (symtab);
    }
  else
    {
      symtab = lookup_symtab (arg);
      if (symtab == NULL)
	{
	  fprintf_filtered (gdb_stderr, _("No source file named %s.\n"), arg);
	  if (!nquery (_("\
Ignore file pending future shared library load? ")))
	    return;
	}
      /* Do not use SYMTAB's filename, later loaded shared libraries may match
         given ARG but not SYMTAB's filename.  */
      filename = arg;
    }

  e = XZALLOC (struct skiplist_entry);
  e->filename = xstrdup (filename);
  e->enabled = 1;

  add_skiplist_entry (e);

  printf_filtered (_("File %s will be skipped when stepping.\n"), filename);
}

static void
skip_function_command (char *arg, int from_tty)
{
  const char *name = NULL;

  /* Default to the current function if no argument is given.  */
  if (arg == NULL)
    {
      CORE_ADDR pc;

      if (!last_displayed_sal_is_valid ())
	error (_("No default function now."));

      pc = get_last_displayed_addr ();
      if (!find_pc_partial_function (pc, &name, NULL, NULL))
	{
	  error (_("No function found containing current program point %s."),
		  paddress (get_current_arch (), pc));
	}
      skip_function (name);
    }
  else
    {
      if (lookup_symbol (arg, NULL, VAR_DOMAIN, NULL) == NULL)
        {
	  fprintf_filtered (gdb_stderr,
			    _("No function found named %s.\n"), arg);

	  if (nquery (_("\
Ignore function pending future shared library load? ")))
	    {
	      /* Add the unverified skiplist entry.  */
	      skip_function (arg);
	    }
	  return;
	}

      skip_function (arg);
    }
}

static void
skip_info (char *arg, int from_tty)
{
  struct skiplist_entry *e;
  int num_printable_entries = 0;
  struct value_print_options opts;
  struct cleanup *tbl_chain;

  get_user_print_options (&opts);

  /* Count the number of rows in the table and see if we need space for a
     64-bit address anywhere.  */
  ALL_SKIPLIST_ENTRIES (e)
    if (arg == NULL || number_is_in_list (arg, e->number))
      num_printable_entries++;

  if (num_printable_entries == 0)
    {
      if (arg == NULL)
	ui_out_message (current_uiout, 0, _("\
Not skipping any files or functions.\n"));
      else
	ui_out_message (current_uiout, 0,
			_("No skiplist entries found with number %s.\n"), arg);

      return;
    }

  tbl_chain = make_cleanup_ui_out_table_begin_end (current_uiout, 4,
						   num_printable_entries,
						   "SkiplistTable");

  ui_out_table_header (current_uiout, 7, ui_left, "number", "Num");      /* 1 */
  ui_out_table_header (current_uiout, 14, ui_left, "type", "Type");      /* 2 */
  ui_out_table_header (current_uiout, 3, ui_left, "enabled", "Enb");     /* 3 */
  ui_out_table_header (current_uiout, 40, ui_noalign, "what", "What");   /* 4 */
  ui_out_table_body (current_uiout);

  ALL_SKIPLIST_ENTRIES (e)
    {
      struct cleanup *entry_chain;

      QUIT;
      if (arg != NULL && !number_is_in_list (arg, e->number))
	continue;

      entry_chain = make_cleanup_ui_out_tuple_begin_end (current_uiout,
							 "blklst-entry");
      ui_out_field_int (current_uiout, "number", e->number);             /* 1 */

      if (e->function_name != NULL)
	ui_out_field_string (current_uiout, "type", "function");         /* 2 */
      else if (e->filename != NULL)
	ui_out_field_string (current_uiout, "type", "file");             /* 2 */
      else
	internal_error (__FILE__, __LINE__, _("\
Skiplist entry should have either a filename or a function name."));

      if (e->enabled)
	ui_out_field_string (current_uiout, "enabled", "y");             /* 3 */
      else
	ui_out_field_string (current_uiout, "enabled", "n");             /* 3 */

      if (e->function_name != NULL)
	ui_out_field_string (current_uiout, "what", e->function_name);	 /* 4 */
      else if (e->filename != NULL)
	ui_out_field_string (current_uiout, "what", e->filename);	 /* 4 */

      ui_out_text (current_uiout, "\n");
      do_cleanups (entry_chain);
    }

  do_cleanups (tbl_chain);
}

static void
skip_enable_command (char *arg, int from_tty)
{
  struct skiplist_entry *e;
  int found = 0;

  ALL_SKIPLIST_ENTRIES (e)
    if (arg == NULL || number_is_in_list (arg, e->number))
      {
        e->enabled = 1;
        found = 1;
      }

  if (!found)
    error (_("No skiplist entries found with number %s."), arg);
}

static void
skip_disable_command (char *arg, int from_tty)
{
  struct skiplist_entry *e;
  int found = 0;

  ALL_SKIPLIST_ENTRIES (e)
    if (arg == NULL || number_is_in_list (arg, e->number))
      {
	e->enabled = 0;
        found = 1;
      }

  if (!found)
    error (_("No skiplist entries found with number %s."), arg);
}

static void
skip_delete_command (char *arg, int from_tty)
{
  struct skiplist_entry *e, *temp, *b_prev;
  int found = 0;

  b_prev = 0;
  ALL_SKIPLIST_ENTRIES_SAFE (e, temp)
    if (arg == NULL || number_is_in_list (arg, e->number))
      {
	if (b_prev != NULL)
	  b_prev->next = e->next;
	else
	  skiplist_entry_chain = e->next;

	xfree (e->function_name);
	xfree (e->filename);
	xfree (e);
        found = 1;
      }
    else
      {
	b_prev = e;
      }

  if (!found)
    error (_("No skiplist entries found with number %s."), arg);
}

/* Create a skiplist entry for the given function NAME and add it to the
   list.  */

static void
skip_function (const char *name)
{
  struct skiplist_entry *e = XZALLOC (struct skiplist_entry);

  e->enabled = 1;
  e->function_name = xstrdup (name);

  add_skiplist_entry (e);

  printf_filtered (_("Function %s will be skipped when stepping.\n"), name);
}

/* Add the given skiplist entry to our list, and set the entry's number.  */

static void
add_skiplist_entry (struct skiplist_entry *e)
{
  struct skiplist_entry *e1;

  e->number = ++skiplist_entry_count;

  /* Add to the end of the chain so that the list of
     skiplist entries will be in numerical order.  */

  e1 = skiplist_entry_chain;
  if (e1 == NULL)
    skiplist_entry_chain = e;
  else
    {
      while (e1->next)
	e1 = e1->next;
      e1->next = e;
    }
}


/* See skip.h.  */

int
function_name_is_marked_for_skip (const char *function_name,
				  const struct symtab_and_line *function_sal)
{
  int searched_for_fullname = 0;
  const char *fullname = NULL;
  struct skiplist_entry *e;

  if (function_name == NULL)
    return 0;

  ALL_SKIPLIST_ENTRIES (e)
    {
      if (!e->enabled)
	continue;

      /* Does the pc we're stepping into match e's stored pc? */
      if (e->function_name != NULL
	  && strcmp_iw (function_name, e->function_name) == 0)
	return 1;

      if (e->filename != NULL)
	{
	  /* Check first sole SYMTAB->FILENAME.  It does not need to be
	     a substring of symtab_to_fullname as it may contain "./" etc.  */
	  if (function_sal->symtab != NULL
	      && compare_filenames_for_search (function_sal->symtab->filename,
					       e->filename))
	    return 1;

	  /* Before we invoke realpath, which can get expensive when many
	     files are involved, do a quick comparison of the basenames.  */
	  if (!basenames_may_differ
	      && (function_sal->symtab == NULL
	          || filename_cmp (lbasename (function_sal->symtab->filename),
				   lbasename (e->filename)) != 0))
	    continue;

	  /* Get the filename corresponding to this FUNCTION_SAL, if we haven't
	     yet.  */
	  if (!searched_for_fullname)
	    {
	      if (function_sal->symtab != NULL)
		fullname = symtab_to_fullname (function_sal->symtab);
	      searched_for_fullname = 1;
	    }
	  if (fullname != NULL
	      && compare_filenames_for_search (fullname, e->filename))
	    return 1;
	}
    }

  return 0;
}

/* Provide a prototype to silence -Wmissing-prototypes.  */
extern initialize_file_ftype _initialize_step_skip;

void
_initialize_step_skip (void)
{
  static struct cmd_list_element *skiplist = NULL;
  struct cmd_list_element *c;

  skiplist_entry_chain = 0;
  skiplist_entry_count = 0;

  add_prefix_cmd ("skip", class_breakpoint, skip_function_command, _("\
Ignore a function while stepping.\n\
Usage: skip [FUNCTION NAME]\n\
If no function name is given, ignore the current function."),
                  &skiplist, "skip ", 1, &cmdlist);

  c = add_cmd ("file", class_breakpoint, skip_file_command, _("\
Ignore a file while stepping.\n\
Usage: skip file [FILENAME]\n\
If no filename is given, ignore the current file."),
	       &skiplist);
  set_cmd_completer (c, filename_completer);

  c = add_cmd ("function", class_breakpoint, skip_function_command, _("\
Ignore a function while stepping.\n\
Usage: skip function [FUNCTION NAME]\n\
If no function name is given, skip the current function."),
	       &skiplist);
  set_cmd_completer (c, location_completer);

  add_cmd ("enable", class_breakpoint, skip_enable_command, _("\
Enable skip entries.  You can specify numbers (e.g. \"skip enable 1 3\"), \
ranges (e.g. \"skip enable 4-8\"), or both (e.g. \"skip enable 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll enable all skip entries.\n\n\
Usage: skip enable [NUMBERS AND/OR RANGES]"),
	   &skiplist);

  add_cmd ("disable", class_breakpoint, skip_disable_command, _("\
Disable skip entries.  You can specify numbers (e.g. \"skip disable 1 3\"), \
ranges (e.g. \"skip disable 4-8\"), or both (e.g. \"skip disable 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll disable all skip entries.\n\n\
Usage: skip disable [NUMBERS AND/OR RANGES]"),
	   &skiplist);

  add_cmd ("delete", class_breakpoint, skip_delete_command, _("\
Delete skip entries.  You can specify numbers (e.g. \"skip delete 1 3\"), \
ranges (e.g. \"skip delete 4-8\"), or both (e.g. \"skip delete 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll delete all skip entries.\n\n\
Usage: skip delete [NUMBERS AND/OR RANGES]"),
           &skiplist);

  add_info ("skip", skip_info, _("\
Display the status of skips.  You can specify numbers (e.g. \"skip info 1 3\"), \
ranges (e.g. \"skip info 4-8\"), or both (e.g. \"skip info 1 3 4-8\").\n\n\
If you don't specify any numbers or ranges, we'll show all skips.\n\n\
Usage: skip info [NUMBERS AND/OR RANGES]\n\
The \"Type\" column indicates one of:\n\
\tfile        - ignored file\n\
\tfunction    - ignored function"));
}