aboutsummaryrefslogtreecommitdiff
path: root/gdb/mi/mi-cmd-stack.c
blob: c0c17bce9a345923ef62832edd92cbf18c362600 (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
/* MI Command Set - stack commands.
   Copyright (C) 2000, 2002-2005, 2007-2012 Free Software Foundation,
   Inc.
   Contributed by Cygnus Solutions (a Red Hat company).

   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 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 "target.h"
#include "frame.h"
#include "value.h"
#include "mi-cmds.h"
#include "ui-out.h"
#include "symtab.h"
#include "block.h"
#include "stack.h"
#include "dictionary.h"
#include "gdb_string.h"
#include "language.h"
#include "valprint.h"
#include "exceptions.h"

enum what_to_list { locals, arguments, all };

static void list_args_or_locals (enum what_to_list what, 
				 enum print_values values,
				 struct frame_info *fi);

/* Print a list of the stack frames. Args can be none, in which case
   we want to print the whole backtrace, or a pair of numbers
   specifying the frame numbers at which to start and stop the
   display. If the two numbers are equal, a single frame will be
   displayed. */
void
mi_cmd_stack_list_frames (char *command, char **argv, int argc)
{
  int frame_low;
  int frame_high;
  int i;
  struct cleanup *cleanup_stack;
  struct frame_info *fi;

  if (argc > 2 || argc == 1)
    error (_("-stack-list-frames: Usage: [FRAME_LOW FRAME_HIGH]"));

  if (argc == 2)
    {
      frame_low = atoi (argv[0]);
      frame_high = atoi (argv[1]);
    }
  else
    {
      /* Called with no arguments, it means we want the whole
         backtrace. */
      frame_low = -1;
      frame_high = -1;
    }

  /* Let's position fi on the frame at which to start the
     display. Could be the innermost frame if the whole stack needs
     displaying, or if frame_low is 0. */
  for (i = 0, fi = get_current_frame ();
       fi && i < frame_low;
       i++, fi = get_prev_frame (fi));

  if (fi == NULL)
    error (_("-stack-list-frames: Not enough frames in stack."));

  cleanup_stack = make_cleanup_ui_out_list_begin_end (current_uiout, "stack");

  /* Now let;s print the frames up to frame_high, or until there are
     frames in the stack. */
  for (;
       fi && (i <= frame_high || frame_high == -1);
       i++, fi = get_prev_frame (fi))
    {
      QUIT;
      /* Print the location and the address always, even for level 0.
         args == 0: don't print the arguments. */
      print_frame_info (fi, 1, LOC_AND_ADDRESS, 0 /* args */ );
    }

  do_cleanups (cleanup_stack);
}

void
mi_cmd_stack_info_depth (char *command, char **argv, int argc)
{
  int frame_high;
  int i;
  struct frame_info *fi;

  if (argc > 1)
    error (_("-stack-info-depth: Usage: [MAX_DEPTH]"));

  if (argc == 1)
    frame_high = atoi (argv[0]);
  else
    /* Called with no arguments, it means we want the real depth of
       the stack. */
    frame_high = -1;

  for (i = 0, fi = get_current_frame ();
       fi && (i < frame_high || frame_high == -1);
       i++, fi = get_prev_frame (fi))
    QUIT;

  ui_out_field_int (current_uiout, "depth", i);
}

static enum print_values
parse_print_values (char *name)
{
   if (strcmp (name, "0") == 0
       || strcmp (name, mi_no_values) == 0)
     return PRINT_NO_VALUES;
   else if (strcmp (name, "1") == 0
	    || strcmp (name, mi_all_values) == 0)
     return PRINT_ALL_VALUES;
   else if (strcmp (name, "2") == 0
	    || strcmp (name, mi_simple_values) == 0)
     return PRINT_SIMPLE_VALUES;
   else
     error (_("Unknown value for PRINT_VALUES: must be: \
0 or \"%s\", 1 or \"%s\", 2 or \"%s\""),
	    mi_no_values, mi_all_values, mi_simple_values);
}

/* Print a list of the locals for the current frame.  With argument of
   0, print only the names, with argument of 1 print also the
   values. */
void
mi_cmd_stack_list_locals (char *command, char **argv, int argc)
{
  struct frame_info *frame;

  if (argc != 1)
    error (_("-stack-list-locals: Usage: PRINT_VALUES"));

   frame = get_selected_frame (NULL);

   list_args_or_locals (locals, parse_print_values (argv[0]), frame);
}

/* Print a list of the arguments for the current frame.  With argument
   of 0, print only the names, with argument of 1 print also the
   values. */
void
mi_cmd_stack_list_args (char *command, char **argv, int argc)
{
  int frame_low;
  int frame_high;
  int i;
  struct frame_info *fi;
  struct cleanup *cleanup_stack_args;
  enum print_values print_values;
  struct ui_out *uiout = current_uiout;

  if (argc < 1 || argc > 3 || argc == 2)
    error (_("-stack-list-arguments: Usage: "
	     "PRINT_VALUES [FRAME_LOW FRAME_HIGH]"));

  if (argc == 3)
    {
      frame_low = atoi (argv[1]);
      frame_high = atoi (argv[2]);
    }
  else
    {
      /* Called with no arguments, it means we want args for the whole
         backtrace. */
      frame_low = -1;
      frame_high = -1;
    }

  print_values = parse_print_values (argv[0]);

  /* Let's position fi on the frame at which to start the
     display. Could be the innermost frame if the whole stack needs
     displaying, or if frame_low is 0. */
  for (i = 0, fi = get_current_frame ();
       fi && i < frame_low;
       i++, fi = get_prev_frame (fi));

  if (fi == NULL)
    error (_("-stack-list-arguments: Not enough frames in stack."));

  cleanup_stack_args
    = make_cleanup_ui_out_list_begin_end (uiout, "stack-args");

  /* Now let's print the frames up to frame_high, or until there are
     frames in the stack. */
  for (;
       fi && (i <= frame_high || frame_high == -1);
       i++, fi = get_prev_frame (fi))
    {
      struct cleanup *cleanup_frame;

      QUIT;
      cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
      ui_out_field_int (uiout, "level", i);
      list_args_or_locals (arguments, print_values, fi);
      do_cleanups (cleanup_frame);
    }

  do_cleanups (cleanup_stack_args);
}

/* Print a list of the local variables (including arguments) for the 
   current frame.  ARGC must be 1 and ARGV[0] specify if only the names,
   or both names and values of the variables must be printed.  See 
   parse_print_value for possible values.  */
void
mi_cmd_stack_list_variables (char *command, char **argv, int argc)
{
  struct frame_info *frame;

  if (argc != 1)
    error (_("Usage: PRINT_VALUES"));

  frame = get_selected_frame (NULL);

  list_args_or_locals (all, parse_print_values (argv[0]), frame);
}

/* Print single local or argument.  ARG must be already read in.  For WHAT and
   VALUES see list_args_or_locals.

   Errors are printed as if they would be the parameter value.  Use zeroed ARG
   iff it should not be printed accoring to VALUES.  */

static void
list_arg_or_local (const struct frame_arg *arg, enum what_to_list what,
		   enum print_values values)
{
  struct cleanup *cleanup_tuple = NULL;
  struct ui_out *uiout = current_uiout;
  struct ui_stream *stb = ui_out_stream_new (uiout);

  gdb_assert (!arg->val || !arg->error);
  gdb_assert ((values == PRINT_NO_VALUES && arg->val == NULL
	       && arg->error == NULL)
	      || values == PRINT_SIMPLE_VALUES
	      || (values == PRINT_ALL_VALUES
		  && (arg->val != NULL || arg->error != NULL)));
  gdb_assert (arg->entry_kind == print_entry_values_no
	      || (arg->entry_kind == print_entry_values_only
	          && (arg->val || arg->error)));

  if (values != PRINT_NO_VALUES || what == all)
    cleanup_tuple = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);

  fputs_filtered (SYMBOL_PRINT_NAME (arg->sym), stb->stream);
  if (arg->entry_kind == print_entry_values_only)
    fputs_filtered ("@entry", stb->stream);
  ui_out_field_stream (uiout, "name", stb);

  if (what == all && SYMBOL_IS_ARGUMENT (arg->sym))
    ui_out_field_int (uiout, "arg", 1);

  if (values == PRINT_SIMPLE_VALUES)
    {
      check_typedef (arg->sym->type);
      type_print (arg->sym->type, "", stb->stream, -1);
      ui_out_field_stream (uiout, "type", stb);
    }

  if (arg->val || arg->error)
    {
      volatile struct gdb_exception except;

      if (arg->error)
	except.message = arg->error;
      else
	{
	  /* TRY_CATCH has two statements, wrap it in a block.  */

	  TRY_CATCH (except, RETURN_MASK_ERROR)
	    {
	      struct value_print_options opts;

	      get_raw_print_options (&opts);
	      opts.deref_ref = 1;
	      common_val_print (arg->val, stb->stream, 0, &opts,
				language_def (SYMBOL_LANGUAGE (arg->sym)));
	    }
	}
      if (except.message)
	fprintf_filtered (stb->stream, _("<error reading variable: %s>"),
			  except.message);
      ui_out_field_stream (uiout, "value", stb);
    }

  ui_out_stream_delete (stb);
  if (values != PRINT_NO_VALUES || what == all)
    do_cleanups (cleanup_tuple);
}

/* Print a list of the locals or the arguments for the currently
   selected frame.  If the argument passed is 0, printonly the names
   of the variables, if an argument of 1 is passed, print the values
   as well. */
static void
list_args_or_locals (enum what_to_list what, enum print_values values,
		     struct frame_info *fi)
{
  struct block *block;
  struct symbol *sym;
  struct dict_iterator iter;
  struct cleanup *cleanup_list;
  struct ui_stream *stb;
  struct type *type;
  char *name_of_result;
  struct ui_out *uiout = current_uiout;

  stb = ui_out_stream_new (uiout);

  block = get_frame_block (fi, 0);

  switch (what)
    {
    case locals:
      name_of_result = "locals";
      break;
    case arguments:
      name_of_result = "args";
      break;
    case all:
      name_of_result = "variables";
      break;
    default:
      internal_error (__FILE__, __LINE__,
		      "unexpected what_to_list: %d", (int) what);
    }

  cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, name_of_result);

  while (block != 0)
    {
      ALL_BLOCK_SYMBOLS (block, iter, sym)
	{
          int print_me = 0;

	  switch (SYMBOL_CLASS (sym))
	    {
	    default:
	    case LOC_UNDEF:	/* catches errors        */
	    case LOC_CONST:	/* constant              */
	    case LOC_TYPEDEF:	/* local typedef         */
	    case LOC_LABEL:	/* local label           */
	    case LOC_BLOCK:	/* local function        */
	    case LOC_CONST_BYTES:	/* loc. byte seq.        */
	    case LOC_UNRESOLVED:	/* unresolved static     */
	    case LOC_OPTIMIZED_OUT:	/* optimized out         */
	      print_me = 0;
	      break;

	    case LOC_ARG:	/* argument              */
	    case LOC_REF_ARG:	/* reference arg         */
	    case LOC_REGPARM_ADDR:	/* indirect register arg */
	    case LOC_LOCAL:	/* stack local           */
	    case LOC_STATIC:	/* static                */
	    case LOC_REGISTER:	/* register              */
	    case LOC_COMPUTED:	/* computed location     */
	      if (what == all)
		print_me = 1;
	      else if (what == locals)
		print_me = !SYMBOL_IS_ARGUMENT (sym);
	      else
		print_me = SYMBOL_IS_ARGUMENT (sym);
	      break;
	    }
	  if (print_me)
	    {
	      struct symbol *sym2;
	      struct frame_arg arg, entryarg;

	      if (SYMBOL_IS_ARGUMENT (sym))
		sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym),
				      block, VAR_DOMAIN,
				      (int *) NULL);
	      else
		sym2 = sym;

	      memset (&arg, 0, sizeof (arg));
	      arg.sym = sym2;
	      arg.entry_kind = print_entry_values_no;
	      memset (&entryarg, 0, sizeof (entryarg));
	      entryarg.sym = sym2;
	      entryarg.entry_kind = print_entry_values_no;

	      switch (values)
		{
		case PRINT_SIMPLE_VALUES:
		  type = check_typedef (sym2->type);
		  if (TYPE_CODE (type) != TYPE_CODE_ARRAY
		      && TYPE_CODE (type) != TYPE_CODE_STRUCT
		      && TYPE_CODE (type) != TYPE_CODE_UNION)
		    {
		case PRINT_ALL_VALUES:
		      read_frame_arg (sym2, fi, &arg, &entryarg);
		    }
		  break;
		}

	      if (arg.entry_kind != print_entry_values_only)
		list_arg_or_local (&arg, what, values);
	      if (entryarg.entry_kind != print_entry_values_no)
		list_arg_or_local (&entryarg, what, values);
	      xfree (arg.error);
	      xfree (entryarg.error);
	    }
	}
      if (BLOCK_FUNCTION (block))
	break;
      else
	block = BLOCK_SUPERBLOCK (block);
    }
  do_cleanups (cleanup_list);
  ui_out_stream_delete (stb);
}

void
mi_cmd_stack_select_frame (char *command, char **argv, int argc)
{
  if (argc == 0 || argc > 1)
    error (_("-stack-select-frame: Usage: FRAME_SPEC"));

  select_frame_command (argv[0], 1 /* not used */ );
}

void
mi_cmd_stack_info_frame (char *command, char **argv, int argc)
{
  if (argc > 0)
    error (_("-stack-info-frame: No arguments required"));

  print_frame_info (get_selected_frame (NULL), 1, LOC_AND_ADDRESS, 0);
}