1 /* MI Command Set - stack commands. 2 Copyright (C) 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009 3 Free Software Foundation, Inc. 4 Contributed by Cygnus Solutions (a Red Hat company). 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #include "defs.h" 22 #include "target.h" 23 #include "frame.h" 24 #include "value.h" 25 #include "mi-cmds.h" 26 #include "ui-out.h" 27 #include "symtab.h" 28 #include "block.h" 29 #include "stack.h" 30 #include "dictionary.h" 31 #include "gdb_string.h" 32 #include "language.h" 33 #include "valprint.h" 34 35 static void list_args_or_locals (int locals, int values, struct frame_info *fi); 36 37 /* Print a list of the stack frames. Args can be none, in which case 38 we want to print the whole backtrace, or a pair of numbers 39 specifying the frame numbers at which to start and stop the 40 display. If the two numbers are equal, a single frame will be 41 displayed. */ 42 void 43 mi_cmd_stack_list_frames (char *command, char **argv, int argc) 44 { 45 int frame_low; 46 int frame_high; 47 int i; 48 struct cleanup *cleanup_stack; 49 struct frame_info *fi; 50 51 if (argc > 2 || argc == 1) 52 error (_("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]")); 53 54 if (argc == 2) 55 { 56 frame_low = atoi (argv[0]); 57 frame_high = atoi (argv[1]); 58 } 59 else 60 { 61 /* Called with no arguments, it means we want the whole 62 backtrace. */ 63 frame_low = -1; 64 frame_high = -1; 65 } 66 67 /* Let's position fi on the frame at which to start the 68 display. Could be the innermost frame if the whole stack needs 69 displaying, or if frame_low is 0. */ 70 for (i = 0, fi = get_current_frame (); 71 fi && i < frame_low; 72 i++, fi = get_prev_frame (fi)); 73 74 if (fi == NULL) 75 error (_("mi_cmd_stack_list_frames: Not enough frames in stack.")); 76 77 cleanup_stack = make_cleanup_ui_out_list_begin_end (uiout, "stack"); 78 79 /* Now let;s print the frames up to frame_high, or until there are 80 frames in the stack. */ 81 for (; 82 fi && (i <= frame_high || frame_high == -1); 83 i++, fi = get_prev_frame (fi)) 84 { 85 QUIT; 86 /* Print the location and the address always, even for level 0. 87 args == 0: don't print the arguments. */ 88 print_frame_info (fi, 1, LOC_AND_ADDRESS, 0 /* args */ ); 89 } 90 91 do_cleanups (cleanup_stack); 92 } 93 94 void 95 mi_cmd_stack_info_depth (char *command, char **argv, int argc) 96 { 97 int frame_high; 98 int i; 99 struct frame_info *fi; 100 101 if (argc > 1) 102 error (_("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]")); 103 104 if (argc == 1) 105 frame_high = atoi (argv[0]); 106 else 107 /* Called with no arguments, it means we want the real depth of 108 the stack. */ 109 frame_high = -1; 110 111 for (i = 0, fi = get_current_frame (); 112 fi && (i < frame_high || frame_high == -1); 113 i++, fi = get_prev_frame (fi)) 114 QUIT; 115 116 ui_out_field_int (uiout, "depth", i); 117 } 118 119 static enum print_values 120 parse_print_values (char *name) 121 { 122 if (strcmp (name, "0") == 0 123 || strcmp (name, mi_no_values) == 0) 124 return PRINT_NO_VALUES; 125 else if (strcmp (name, "1") == 0 126 || strcmp (name, mi_all_values) == 0) 127 return PRINT_ALL_VALUES; 128 else if (strcmp (name, "2") == 0 129 || strcmp (name, mi_simple_values) == 0) 130 return PRINT_SIMPLE_VALUES; 131 else 132 error (_("Unknown value for PRINT_VALUES: must be: \ 133 0 or \"%s\", 1 or \"%s\", 2 or \"%s\""), 134 mi_no_values, mi_all_values, mi_simple_values); 135 } 136 137 /* Print a list of the locals for the current frame. With argument of 138 0, print only the names, with argument of 1 print also the 139 values. */ 140 void 141 mi_cmd_stack_list_locals (char *command, char **argv, int argc) 142 { 143 struct frame_info *frame; 144 enum print_values print_values; 145 146 if (argc != 1) 147 error (_("mi_cmd_stack_list_locals: Usage: PRINT_VALUES")); 148 149 frame = get_selected_frame (NULL); 150 151 list_args_or_locals (1, parse_print_values (argv[0]), frame); 152 } 153 154 /* Print a list of the arguments for the current frame. With argument 155 of 0, print only the names, with argument of 1 print also the 156 values. */ 157 void 158 mi_cmd_stack_list_args (char *command, char **argv, int argc) 159 { 160 int frame_low; 161 int frame_high; 162 int i; 163 struct frame_info *fi; 164 struct cleanup *cleanup_stack_args; 165 enum print_values print_values; 166 167 if (argc < 1 || argc > 3 || argc == 2) 168 error (_("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]")); 169 170 if (argc == 3) 171 { 172 frame_low = atoi (argv[1]); 173 frame_high = atoi (argv[2]); 174 } 175 else 176 { 177 /* Called with no arguments, it means we want args for the whole 178 backtrace. */ 179 frame_low = -1; 180 frame_high = -1; 181 } 182 183 print_values = parse_print_values (argv[0]); 184 185 /* Let's position fi on the frame at which to start the 186 display. Could be the innermost frame if the whole stack needs 187 displaying, or if frame_low is 0. */ 188 for (i = 0, fi = get_current_frame (); 189 fi && i < frame_low; 190 i++, fi = get_prev_frame (fi)); 191 192 if (fi == NULL) 193 error (_("mi_cmd_stack_list_args: Not enough frames in stack.")); 194 195 cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args"); 196 197 /* Now let's print the frames up to frame_high, or until there are 198 frames in the stack. */ 199 for (; 200 fi && (i <= frame_high || frame_high == -1); 201 i++, fi = get_prev_frame (fi)) 202 { 203 struct cleanup *cleanup_frame; 204 QUIT; 205 cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); 206 ui_out_field_int (uiout, "level", i); 207 list_args_or_locals (0, print_values, fi); 208 do_cleanups (cleanup_frame); 209 } 210 211 do_cleanups (cleanup_stack_args); 212 } 213 214 /* Print a list of the locals or the arguments for the currently 215 selected frame. If the argument passed is 0, printonly the names 216 of the variables, if an argument of 1 is passed, print the values 217 as well. */ 218 static void 219 list_args_or_locals (int locals, int values, struct frame_info *fi) 220 { 221 struct block *block; 222 struct symbol *sym; 223 struct dict_iterator iter; 224 int nsyms; 225 struct cleanup *cleanup_list; 226 static struct ui_stream *stb = NULL; 227 struct type *type; 228 229 stb = ui_out_stream_new (uiout); 230 231 block = get_frame_block (fi, 0); 232 233 cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, locals ? "locals" : "args"); 234 235 while (block != 0) 236 { 237 ALL_BLOCK_SYMBOLS (block, iter, sym) 238 { 239 int print_me = 0; 240 241 switch (SYMBOL_CLASS (sym)) 242 { 243 default: 244 case LOC_UNDEF: /* catches errors */ 245 case LOC_CONST: /* constant */ 246 case LOC_TYPEDEF: /* local typedef */ 247 case LOC_LABEL: /* local label */ 248 case LOC_BLOCK: /* local function */ 249 case LOC_CONST_BYTES: /* loc. byte seq. */ 250 case LOC_UNRESOLVED: /* unresolved static */ 251 case LOC_OPTIMIZED_OUT: /* optimized out */ 252 print_me = 0; 253 break; 254 255 case LOC_ARG: /* argument */ 256 case LOC_REF_ARG: /* reference arg */ 257 case LOC_REGPARM_ADDR: /* indirect register arg */ 258 case LOC_LOCAL: /* stack local */ 259 case LOC_STATIC: /* static */ 260 case LOC_REGISTER: /* register */ 261 case LOC_COMPUTED: /* computed location */ 262 if (SYMBOL_IS_ARGUMENT (sym) ? !locals : locals) 263 print_me = 1; 264 break; 265 } 266 if (print_me) 267 { 268 struct cleanup *cleanup_tuple = NULL; 269 struct symbol *sym2; 270 struct value *val; 271 if (values != PRINT_NO_VALUES) 272 cleanup_tuple = 273 make_cleanup_ui_out_tuple_begin_end (uiout, NULL); 274 ui_out_field_string (uiout, "name", SYMBOL_PRINT_NAME (sym)); 275 276 if (!locals) 277 sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym), 278 block, VAR_DOMAIN, 279 (int *) NULL); 280 else 281 sym2 = sym; 282 switch (values) 283 { 284 case PRINT_SIMPLE_VALUES: 285 type = check_typedef (sym2->type); 286 type_print (sym2->type, "", stb->stream, -1); 287 ui_out_field_stream (uiout, "type", stb); 288 if (TYPE_CODE (type) != TYPE_CODE_ARRAY 289 && TYPE_CODE (type) != TYPE_CODE_STRUCT 290 && TYPE_CODE (type) != TYPE_CODE_UNION) 291 { 292 struct value_print_options opts; 293 val = read_var_value (sym2, fi); 294 get_raw_print_options (&opts); 295 opts.deref_ref = 1; 296 common_val_print 297 (val, stb->stream, 0, &opts, 298 language_def (SYMBOL_LANGUAGE (sym2))); 299 ui_out_field_stream (uiout, "value", stb); 300 } 301 do_cleanups (cleanup_tuple); 302 break; 303 case PRINT_ALL_VALUES: 304 { 305 struct value_print_options opts; 306 val = read_var_value (sym2, fi); 307 get_raw_print_options (&opts); 308 opts.deref_ref = 1; 309 common_val_print 310 (val, stb->stream, 0, &opts, 311 language_def (SYMBOL_LANGUAGE (sym2))); 312 ui_out_field_stream (uiout, "value", stb); 313 do_cleanups (cleanup_tuple); 314 } 315 break; 316 } 317 } 318 } 319 if (BLOCK_FUNCTION (block)) 320 break; 321 else 322 block = BLOCK_SUPERBLOCK (block); 323 } 324 do_cleanups (cleanup_list); 325 ui_out_stream_delete (stb); 326 } 327 328 void 329 mi_cmd_stack_select_frame (char *command, char **argv, int argc) 330 { 331 if (argc == 0 || argc > 1) 332 error (_("mi_cmd_stack_select_frame: Usage: FRAME_SPEC")); 333 334 select_frame_command (argv[0], 1 /* not used */ ); 335 } 336 337 void 338 mi_cmd_stack_info_frame (char *command, char **argv, int argc) 339 { 340 if (argc > 0) 341 error (_("mi_cmd_stack_info_frame: No arguments required")); 342 343 print_frame_info (get_selected_frame (NULL), 1, LOC_AND_ADDRESS, 0); 344 } 345