1 /* MI Command Set - stack commands.
2 Copyright 2000, 2002, 2003, 2004 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions (a Red Hat company).
4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
21
22 #include "defs.h"
23 #include "target.h"
24 #include "frame.h"
25 #include "value.h"
26 #include "mi-cmds.h"
27 #include "ui-out.h"
28 #include "symtab.h"
29 #include "block.h"
30 #include "stack.h"
31 #include "dictionary.h"
32 #include "gdb_string.h"
33
34 static void list_args_or_locals (int locals, int values, struct frame_info *fi);
35
36 /* Print a list of the stack frames. Args can be none, in which case
37 we want to print the whole backtrace, or a pair of numbers
38 specifying the frame numbers at which to start and stop the
39 display. If the two numbers are equal, a single frame will be
40 displayed. */
41 enum mi_cmd_result
mi_cmd_stack_list_frames(char * command,char ** argv,int argc)42 mi_cmd_stack_list_frames (char *command, char **argv, int argc)
43 {
44 int frame_low;
45 int frame_high;
46 int i;
47 struct cleanup *cleanup_stack;
48 struct frame_info *fi;
49
50 if (!target_has_stack)
51 error ("mi_cmd_stack_list_frames: No stack.");
52
53 if (argc > 2 || argc == 1)
54 error ("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]");
55
56 if (argc == 2)
57 {
58 frame_low = atoi (argv[0]);
59 frame_high = atoi (argv[1]);
60 }
61 else
62 {
63 /* Called with no arguments, it means we want the whole
64 backtrace. */
65 frame_low = -1;
66 frame_high = -1;
67 }
68
69 /* Let's position fi on the frame at which to start the
70 display. Could be the innermost frame if the whole stack needs
71 displaying, or if frame_low is 0. */
72 for (i = 0, fi = get_current_frame ();
73 fi && i < frame_low;
74 i++, fi = get_prev_frame (fi));
75
76 if (fi == NULL)
77 error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
78
79 cleanup_stack = make_cleanup_ui_out_list_begin_end (uiout, "stack");
80
81 /* Now let;s print the frames up to frame_high, or until there are
82 frames in the stack. */
83 for (;
84 fi && (i <= frame_high || frame_high == -1);
85 i++, fi = get_prev_frame (fi))
86 {
87 QUIT;
88 /* level == i: always print the level 'i'
89 source == LOC_AND_ADDRESS: print the location and the address
90 always, even for level 0.
91 args == 0: don't print the arguments. */
92 print_frame_info (fi /* frame info */ ,
93 i /* level */ ,
94 LOC_AND_ADDRESS /* source */ ,
95 0 /* args */ );
96 }
97
98 do_cleanups (cleanup_stack);
99 if (i < frame_high)
100 error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
101
102 return MI_CMD_DONE;
103 }
104
105 enum mi_cmd_result
mi_cmd_stack_info_depth(char * command,char ** argv,int argc)106 mi_cmd_stack_info_depth (char *command, char **argv, int argc)
107 {
108 int frame_high;
109 int i;
110 struct frame_info *fi;
111
112 if (!target_has_stack)
113 error ("mi_cmd_stack_info_depth: No stack.");
114
115 if (argc > 1)
116 error ("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]");
117
118 if (argc == 1)
119 frame_high = atoi (argv[0]);
120 else
121 /* Called with no arguments, it means we want the real depth of
122 the stack. */
123 frame_high = -1;
124
125 for (i = 0, fi = get_current_frame ();
126 fi && (i < frame_high || frame_high == -1);
127 i++, fi = get_prev_frame (fi))
128 QUIT;
129
130 ui_out_field_int (uiout, "depth", i);
131
132 return MI_CMD_DONE;
133 }
134
135 /* Print a list of the locals for the current frame. With argument of
136 0, print only the names, with argument of 1 print also the
137 values. */
138 enum mi_cmd_result
mi_cmd_stack_list_locals(char * command,char ** argv,int argc)139 mi_cmd_stack_list_locals (char *command, char **argv, int argc)
140 {
141 struct frame_info *frame;
142 enum print_values print_values;
143
144 if (argc != 1)
145 error ("mi_cmd_stack_list_locals: Usage: PRINT_VALUES");
146
147 frame = get_selected_frame ();
148
149 if (strcmp (argv[0], "0") == 0
150 || strcmp (argv[0], "--no-values") == 0)
151 print_values = PRINT_NO_VALUES;
152 else if (strcmp (argv[0], "1") == 0
153 || strcmp (argv[0], "--all-values") == 0)
154 print_values = PRINT_ALL_VALUES;
155 else if (strcmp (argv[0], "2") == 0
156 || strcmp (argv[0], "--simple-values") == 0)
157 print_values = PRINT_SIMPLE_VALUES;
158 else
159 error ("Unknown value for PRINT_VALUES: must be: 0 or \"--no-values\", 1 or \"--all-values\", 2 or \"--simple-values\"");
160 list_args_or_locals (1, print_values, frame);
161 return MI_CMD_DONE;
162 }
163
164 /* Print a list of the arguments for the current frame. With argument
165 of 0, print only the names, with argument of 1 print also the
166 values. */
167 enum mi_cmd_result
mi_cmd_stack_list_args(char * command,char ** argv,int argc)168 mi_cmd_stack_list_args (char *command, char **argv, int argc)
169 {
170 int frame_low;
171 int frame_high;
172 int i;
173 struct frame_info *fi;
174 struct cleanup *cleanup_stack_args;
175
176 if (argc < 1 || argc > 3 || argc == 2)
177 error ("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]");
178
179 if (argc == 3)
180 {
181 frame_low = atoi (argv[1]);
182 frame_high = atoi (argv[2]);
183 }
184 else
185 {
186 /* Called with no arguments, it means we want args for the whole
187 backtrace. */
188 frame_low = -1;
189 frame_high = -1;
190 }
191
192 /* Let's position fi on the frame at which to start the
193 display. Could be the innermost frame if the whole stack needs
194 displaying, or if frame_low is 0. */
195 for (i = 0, fi = get_current_frame ();
196 fi && i < frame_low;
197 i++, fi = get_prev_frame (fi));
198
199 if (fi == NULL)
200 error ("mi_cmd_stack_list_args: Not enough frames in stack.");
201
202 cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args");
203
204 /* Now let's print the frames up to frame_high, or until there are
205 frames in the stack. */
206 for (;
207 fi && (i <= frame_high || frame_high == -1);
208 i++, fi = get_prev_frame (fi))
209 {
210 struct cleanup *cleanup_frame;
211 QUIT;
212 cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
213 ui_out_field_int (uiout, "level", i);
214 list_args_or_locals (0, atoi (argv[0]), fi);
215 do_cleanups (cleanup_frame);
216 }
217
218 do_cleanups (cleanup_stack_args);
219 if (i < frame_high)
220 error ("mi_cmd_stack_list_args: Not enough frames in stack.");
221
222 return MI_CMD_DONE;
223 }
224
225 /* Print a list of the locals or the arguments for the currently
226 selected frame. If the argument passed is 0, printonly the names
227 of the variables, if an argument of 1 is passed, print the values
228 as well. */
229 static void
list_args_or_locals(int locals,int values,struct frame_info * fi)230 list_args_or_locals (int locals, int values, struct frame_info *fi)
231 {
232 struct block *block;
233 struct symbol *sym;
234 struct dict_iterator iter;
235 int nsyms;
236 struct cleanup *cleanup_list;
237 static struct ui_stream *stb = NULL;
238 struct type *type;
239
240 stb = ui_out_stream_new (uiout);
241
242 block = get_frame_block (fi, 0);
243
244 cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, locals ? "locals" : "args");
245
246 while (block != 0)
247 {
248 ALL_BLOCK_SYMBOLS (block, iter, sym)
249 {
250 int print_me = 0;
251
252 switch (SYMBOL_CLASS (sym))
253 {
254 default:
255 case LOC_UNDEF: /* catches errors */
256 case LOC_CONST: /* constant */
257 case LOC_TYPEDEF: /* local typedef */
258 case LOC_LABEL: /* local label */
259 case LOC_BLOCK: /* local function */
260 case LOC_CONST_BYTES: /* loc. byte seq. */
261 case LOC_UNRESOLVED: /* unresolved static */
262 case LOC_OPTIMIZED_OUT: /* optimized out */
263 print_me = 0;
264 break;
265
266 case LOC_ARG: /* argument */
267 case LOC_REF_ARG: /* reference arg */
268 case LOC_REGPARM: /* register arg */
269 case LOC_REGPARM_ADDR: /* indirect register arg */
270 case LOC_LOCAL_ARG: /* stack arg */
271 case LOC_BASEREG_ARG: /* basereg arg */
272 case LOC_COMPUTED_ARG: /* arg with computed location */
273 if (!locals)
274 print_me = 1;
275 break;
276
277 case LOC_LOCAL: /* stack local */
278 case LOC_BASEREG: /* basereg local */
279 case LOC_STATIC: /* static */
280 case LOC_REGISTER: /* register */
281 case LOC_COMPUTED: /* computed location */
282 if (locals)
283 print_me = 1;
284 break;
285 }
286 if (print_me)
287 {
288 struct cleanup *cleanup_tuple = NULL;
289 struct symbol *sym2;
290 if (values != PRINT_NO_VALUES)
291 cleanup_tuple =
292 make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
293 ui_out_field_string (uiout, "name", SYMBOL_PRINT_NAME (sym));
294
295 if (!locals)
296 sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym),
297 block, VAR_DOMAIN,
298 (int *) NULL,
299 (struct symtab **) NULL);
300 else
301 sym2 = sym;
302 switch (values)
303 {
304 case PRINT_SIMPLE_VALUES:
305 type = check_typedef (sym2->type);
306 type_print (sym2->type, "", stb->stream, -1);
307 ui_out_field_stream (uiout, "type", stb);
308 if (TYPE_CODE (type) != TYPE_CODE_ARRAY
309 && TYPE_CODE (type) != TYPE_CODE_STRUCT
310 && TYPE_CODE (type) != TYPE_CODE_UNION)
311 {
312 print_variable_value (sym2, fi, stb->stream);
313 ui_out_field_stream (uiout, "value", stb);
314 }
315 do_cleanups (cleanup_tuple);
316 break;
317 case PRINT_ALL_VALUES:
318 print_variable_value (sym2, fi, stb->stream);
319 ui_out_field_stream (uiout, "value", stb);
320 do_cleanups (cleanup_tuple);
321 break;
322 }
323 }
324 }
325 if (BLOCK_FUNCTION (block))
326 break;
327 else
328 block = BLOCK_SUPERBLOCK (block);
329 }
330 do_cleanups (cleanup_list);
331 ui_out_stream_delete (stb);
332 }
333
334 enum mi_cmd_result
mi_cmd_stack_select_frame(char * command,char ** argv,int argc)335 mi_cmd_stack_select_frame (char *command, char **argv, int argc)
336 {
337 if (!target_has_stack)
338 error ("mi_cmd_stack_select_frame: No stack.");
339
340 if (argc > 1)
341 error ("mi_cmd_stack_select_frame: Usage: [FRAME_SPEC]");
342
343 /* with no args, don't change frame */
344 if (argc == 0)
345 select_frame_command (0, 1 /* not used */ );
346 else
347 select_frame_command (argv[0], 1 /* not used */ );
348 return MI_CMD_DONE;
349 }
350