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 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 /* Print the location and the address always, even for level 0. 89 args == 0: don't print the arguments. */ 90 print_frame_info (fi, 1, LOC_AND_ADDRESS, 0 /* args */ ); 91 } 92 93 do_cleanups (cleanup_stack); 94 if (i < frame_high) 95 error ("mi_cmd_stack_list_frames: Not enough frames in stack."); 96 97 return MI_CMD_DONE; 98 } 99 100 enum mi_cmd_result 101 mi_cmd_stack_info_depth (char *command, char **argv, int argc) 102 { 103 int frame_high; 104 int i; 105 struct frame_info *fi; 106 107 if (!target_has_stack) 108 error ("mi_cmd_stack_info_depth: No stack."); 109 110 if (argc > 1) 111 error ("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]"); 112 113 if (argc == 1) 114 frame_high = atoi (argv[0]); 115 else 116 /* Called with no arguments, it means we want the real depth of 117 the stack. */ 118 frame_high = -1; 119 120 for (i = 0, fi = get_current_frame (); 121 fi && (i < frame_high || frame_high == -1); 122 i++, fi = get_prev_frame (fi)) 123 QUIT; 124 125 ui_out_field_int (uiout, "depth", i); 126 127 return MI_CMD_DONE; 128 } 129 130 /* Print a list of the locals for the current frame. With argument of 131 0, print only the names, with argument of 1 print also the 132 values. */ 133 enum mi_cmd_result 134 mi_cmd_stack_list_locals (char *command, char **argv, int argc) 135 { 136 struct frame_info *frame; 137 enum print_values print_values; 138 139 if (argc != 1) 140 error ("mi_cmd_stack_list_locals: Usage: PRINT_VALUES"); 141 142 frame = get_selected_frame (); 143 144 if (strcmp (argv[0], "0") == 0 145 || strcmp (argv[0], "--no-values") == 0) 146 print_values = PRINT_NO_VALUES; 147 else if (strcmp (argv[0], "1") == 0 148 || strcmp (argv[0], "--all-values") == 0) 149 print_values = PRINT_ALL_VALUES; 150 else if (strcmp (argv[0], "2") == 0 151 || strcmp (argv[0], "--simple-values") == 0) 152 print_values = PRINT_SIMPLE_VALUES; 153 else 154 error ("Unknown value for PRINT_VALUES: must be: 0 or \"--no-values\", 1 or \"--all-values\", 2 or \"--simple-values\""); 155 list_args_or_locals (1, print_values, frame); 156 return MI_CMD_DONE; 157 } 158 159 /* Print a list of the arguments for the current frame. With argument 160 of 0, print only the names, with argument of 1 print also the 161 values. */ 162 enum mi_cmd_result 163 mi_cmd_stack_list_args (char *command, char **argv, int argc) 164 { 165 int frame_low; 166 int frame_high; 167 int i; 168 struct frame_info *fi; 169 struct cleanup *cleanup_stack_args; 170 171 if (argc < 1 || argc > 3 || argc == 2) 172 error ("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]"); 173 174 if (argc == 3) 175 { 176 frame_low = atoi (argv[1]); 177 frame_high = atoi (argv[2]); 178 } 179 else 180 { 181 /* Called with no arguments, it means we want args for the whole 182 backtrace. */ 183 frame_low = -1; 184 frame_high = -1; 185 } 186 187 /* Let's position fi on the frame at which to start the 188 display. Could be the innermost frame if the whole stack needs 189 displaying, or if frame_low is 0. */ 190 for (i = 0, fi = get_current_frame (); 191 fi && i < frame_low; 192 i++, fi = get_prev_frame (fi)); 193 194 if (fi == NULL) 195 error ("mi_cmd_stack_list_args: Not enough frames in stack."); 196 197 cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args"); 198 199 /* Now let's print the frames up to frame_high, or until there are 200 frames in the stack. */ 201 for (; 202 fi && (i <= frame_high || frame_high == -1); 203 i++, fi = get_prev_frame (fi)) 204 { 205 struct cleanup *cleanup_frame; 206 QUIT; 207 cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); 208 ui_out_field_int (uiout, "level", i); 209 list_args_or_locals (0, atoi (argv[0]), fi); 210 do_cleanups (cleanup_frame); 211 } 212 213 do_cleanups (cleanup_stack_args); 214 if (i < frame_high) 215 error ("mi_cmd_stack_list_args: Not enough frames in stack."); 216 217 return MI_CMD_DONE; 218 } 219 220 /* Print a list of the locals or the arguments for the currently 221 selected frame. If the argument passed is 0, printonly the names 222 of the variables, if an argument of 1 is passed, print the values 223 as well. */ 224 static void 225 list_args_or_locals (int locals, int values, struct frame_info *fi) 226 { 227 struct block *block; 228 struct symbol *sym; 229 struct dict_iterator iter; 230 int nsyms; 231 struct cleanup *cleanup_list; 232 static struct ui_stream *stb = NULL; 233 struct type *type; 234 235 stb = ui_out_stream_new (uiout); 236 237 block = get_frame_block (fi, 0); 238 239 cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, locals ? "locals" : "args"); 240 241 while (block != 0) 242 { 243 ALL_BLOCK_SYMBOLS (block, iter, sym) 244 { 245 int print_me = 0; 246 247 switch (SYMBOL_CLASS (sym)) 248 { 249 default: 250 case LOC_UNDEF: /* catches errors */ 251 case LOC_CONST: /* constant */ 252 case LOC_TYPEDEF: /* local typedef */ 253 case LOC_LABEL: /* local label */ 254 case LOC_BLOCK: /* local function */ 255 case LOC_CONST_BYTES: /* loc. byte seq. */ 256 case LOC_UNRESOLVED: /* unresolved static */ 257 case LOC_OPTIMIZED_OUT: /* optimized out */ 258 print_me = 0; 259 break; 260 261 case LOC_ARG: /* argument */ 262 case LOC_REF_ARG: /* reference arg */ 263 case LOC_REGPARM: /* register arg */ 264 case LOC_REGPARM_ADDR: /* indirect register arg */ 265 case LOC_LOCAL_ARG: /* stack arg */ 266 case LOC_BASEREG_ARG: /* basereg arg */ 267 case LOC_COMPUTED_ARG: /* arg with computed location */ 268 if (!locals) 269 print_me = 1; 270 break; 271 272 case LOC_LOCAL: /* stack local */ 273 case LOC_BASEREG: /* basereg local */ 274 case LOC_STATIC: /* static */ 275 case LOC_REGISTER: /* register */ 276 case LOC_COMPUTED: /* computed location */ 277 if (locals) 278 print_me = 1; 279 break; 280 } 281 if (print_me) 282 { 283 struct cleanup *cleanup_tuple = NULL; 284 struct symbol *sym2; 285 if (values != PRINT_NO_VALUES) 286 cleanup_tuple = 287 make_cleanup_ui_out_tuple_begin_end (uiout, NULL); 288 ui_out_field_string (uiout, "name", SYMBOL_PRINT_NAME (sym)); 289 290 if (!locals) 291 sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym), 292 block, VAR_DOMAIN, 293 (int *) NULL, 294 (struct symtab **) NULL); 295 else 296 sym2 = sym; 297 switch (values) 298 { 299 case PRINT_SIMPLE_VALUES: 300 type = check_typedef (sym2->type); 301 type_print (sym2->type, "", stb->stream, -1); 302 ui_out_field_stream (uiout, "type", stb); 303 if (TYPE_CODE (type) != TYPE_CODE_ARRAY 304 && TYPE_CODE (type) != TYPE_CODE_STRUCT 305 && TYPE_CODE (type) != TYPE_CODE_UNION) 306 { 307 print_variable_value (sym2, fi, stb->stream); 308 ui_out_field_stream (uiout, "value", stb); 309 } 310 do_cleanups (cleanup_tuple); 311 break; 312 case PRINT_ALL_VALUES: 313 print_variable_value (sym2, fi, stb->stream); 314 ui_out_field_stream (uiout, "value", stb); 315 do_cleanups (cleanup_tuple); 316 break; 317 } 318 } 319 } 320 if (BLOCK_FUNCTION (block)) 321 break; 322 else 323 block = BLOCK_SUPERBLOCK (block); 324 } 325 do_cleanups (cleanup_list); 326 ui_out_stream_delete (stb); 327 } 328 329 enum mi_cmd_result 330 mi_cmd_stack_select_frame (char *command, char **argv, int argc) 331 { 332 if (!target_has_stack) 333 error ("mi_cmd_stack_select_frame: No stack."); 334 335 if (argc > 1) 336 error ("mi_cmd_stack_select_frame: Usage: [FRAME_SPEC]"); 337 338 /* with no args, don't change frame */ 339 if (argc == 0) 340 select_frame_command (0, 1 /* not used */ ); 341 else 342 select_frame_command (argv[0], 1 /* not used */ ); 343 return MI_CMD_DONE; 344 } 345