| 1 | /* Print and select stack frames for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, |
| 4 | 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free |
| 5 | Software Foundation, Inc. |
| 6 | |
| 7 | This file is part of GDB. |
| 8 | |
| 9 | This program is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2 of the License, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | This program is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with this program; if not, write to the Free Software |
| 21 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 22 | Boston, MA 02111-1307, USA. */ |
| 23 | |
| 24 | #include <ctype.h> |
| 25 | #include "defs.h" |
| 26 | #include "gdb_string.h" |
| 27 | #include "value.h" |
| 28 | #include "symtab.h" |
| 29 | #include "gdbtypes.h" |
| 30 | #include "expression.h" |
| 31 | #include "language.h" |
| 32 | #include "frame.h" |
| 33 | #include "gdbcmd.h" |
| 34 | #include "gdbcore.h" |
| 35 | #include "target.h" |
| 36 | #include "source.h" |
| 37 | #include "breakpoint.h" |
| 38 | #include "demangle.h" |
| 39 | #include "inferior.h" |
| 40 | #include "annotate.h" |
| 41 | #include "ui-out.h" |
| 42 | #include "block.h" |
| 43 | #include "stack.h" |
| 44 | #include "gdb_assert.h" |
| 45 | #include "dictionary.h" |
| 46 | #include "reggroups.h" |
| 47 | #include "regcache.h" |
| 48 | |
| 49 | /* Prototypes for exported functions. */ |
| 50 | |
| 51 | void args_info (char *, int); |
| 52 | |
| 53 | void locals_info (char *, int); |
| 54 | |
| 55 | void (*selected_frame_level_changed_hook) (int); |
| 56 | |
| 57 | void _initialize_stack (void); |
| 58 | |
| 59 | /* Prototypes for local functions. */ |
| 60 | |
| 61 | static void down_command (char *, int); |
| 62 | |
| 63 | static void down_silently_base (char *); |
| 64 | |
| 65 | static void down_silently_command (char *, int); |
| 66 | |
| 67 | static void up_command (char *, int); |
| 68 | |
| 69 | static void up_silently_base (char *); |
| 70 | |
| 71 | static void up_silently_command (char *, int); |
| 72 | |
| 73 | void frame_command (char *, int); |
| 74 | |
| 75 | static void current_frame_command (char *, int); |
| 76 | |
| 77 | static void print_frame_arg_vars (struct frame_info *, struct ui_file *); |
| 78 | |
| 79 | static void catch_info (char *, int); |
| 80 | |
| 81 | static void args_plus_locals_info (char *, int); |
| 82 | |
| 83 | static void print_frame_label_vars (struct frame_info *, int, |
| 84 | struct ui_file *); |
| 85 | |
| 86 | static void print_frame_local_vars (struct frame_info *, int, |
| 87 | struct ui_file *); |
| 88 | |
| 89 | static int print_block_frame_labels (struct block *, int *, |
| 90 | struct ui_file *); |
| 91 | |
| 92 | static int print_block_frame_locals (struct block *, |
| 93 | struct frame_info *, |
| 94 | int, |
| 95 | struct ui_file *); |
| 96 | |
| 97 | static void print_frame (struct frame_info *fi, |
| 98 | int level, |
| 99 | int source, |
| 100 | int args, |
| 101 | struct symtab_and_line sal); |
| 102 | |
| 103 | static void backtrace_command (char *, int); |
| 104 | |
| 105 | struct frame_info *parse_frame_specification (char *); |
| 106 | |
| 107 | static void frame_info (char *, int); |
| 108 | |
| 109 | extern int addressprint; /* Print addresses, or stay symbolic only? */ |
| 110 | |
| 111 | /* Zero means do things normally; we are interacting directly with the |
| 112 | user. One means print the full filename and linenumber when a |
| 113 | frame is printed, and do so in a format emacs18/emacs19.22 can |
| 114 | parse. Two means print similar annotations, but in many more |
| 115 | cases and in a slightly different syntax. */ |
| 116 | |
| 117 | int annotation_level = 0; |
| 118 | \f |
| 119 | |
| 120 | struct print_stack_frame_args |
| 121 | { |
| 122 | struct frame_info *fi; |
| 123 | int level; |
| 124 | int source; |
| 125 | int args; |
| 126 | }; |
| 127 | |
| 128 | /* Show or print the frame arguments. |
| 129 | Pass the args the way catch_errors wants them. */ |
| 130 | static int print_stack_frame_stub (void *args); |
| 131 | static int |
| 132 | print_stack_frame_stub (void *args) |
| 133 | { |
| 134 | struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| 135 | |
| 136 | print_frame_info (p->fi, p->level, p->source, p->args); |
| 137 | return 0; |
| 138 | } |
| 139 | |
| 140 | /* Show or print a stack frame briefly. FRAME_INFI should be the frame info |
| 141 | and LEVEL should be its level in the stack (or -1 for level not defined). |
| 142 | This prints the level, the function executing, the arguments, |
| 143 | and the file name and line number. |
| 144 | If the pc is not at the beginning of the source line, |
| 145 | the actual pc is printed at the beginning. |
| 146 | |
| 147 | If SOURCE is 1, print the source line as well. |
| 148 | If SOURCE is -1, print ONLY the source line. */ |
| 149 | |
| 150 | void |
| 151 | print_stack_frame (struct frame_info *fi, int level, int source) |
| 152 | { |
| 153 | struct print_stack_frame_args args; |
| 154 | |
| 155 | args.fi = fi; |
| 156 | args.level = level; |
| 157 | args.source = source; |
| 158 | args.args = 1; |
| 159 | |
| 160 | catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL); |
| 161 | } |
| 162 | |
| 163 | struct print_args_args |
| 164 | { |
| 165 | struct symbol *func; |
| 166 | struct frame_info *fi; |
| 167 | struct ui_file *stream; |
| 168 | }; |
| 169 | |
| 170 | static int print_args_stub (void *); |
| 171 | |
| 172 | /* Print nameless args on STREAM. |
| 173 | FI is the frameinfo for this frame, START is the offset |
| 174 | of the first nameless arg, and NUM is the number of nameless args to |
| 175 | print. FIRST is nonzero if this is the first argument (not just |
| 176 | the first nameless arg). */ |
| 177 | |
| 178 | static void |
| 179 | print_frame_nameless_args (struct frame_info *fi, long start, int num, |
| 180 | int first, struct ui_file *stream) |
| 181 | { |
| 182 | int i; |
| 183 | CORE_ADDR argsaddr; |
| 184 | long arg_value; |
| 185 | |
| 186 | for (i = 0; i < num; i++) |
| 187 | { |
| 188 | QUIT; |
| 189 | argsaddr = get_frame_args_address (fi); |
| 190 | if (!argsaddr) |
| 191 | return; |
| 192 | arg_value = read_memory_integer (argsaddr + start, sizeof (int)); |
| 193 | if (!first) |
| 194 | fprintf_filtered (stream, ", "); |
| 195 | fprintf_filtered (stream, "%ld", arg_value); |
| 196 | first = 0; |
| 197 | start += sizeof (int); |
| 198 | } |
| 199 | } |
| 200 | |
| 201 | /* Print the arguments of a stack frame, given the function FUNC |
| 202 | running in that frame (as a symbol), the info on the frame, |
| 203 | and the number of args according to the stack frame (or -1 if unknown). */ |
| 204 | |
| 205 | /* References here and elsewhere to "number of args according to the |
| 206 | stack frame" appear in all cases to refer to "number of ints of args |
| 207 | according to the stack frame". At least for VAX, i386, isi. */ |
| 208 | |
| 209 | static void |
| 210 | print_frame_args (struct symbol *func, struct frame_info *fi, int num, |
| 211 | struct ui_file *stream) |
| 212 | { |
| 213 | struct block *b = NULL; |
| 214 | int first = 1; |
| 215 | struct dict_iterator iter; |
| 216 | struct symbol *sym; |
| 217 | struct value *val; |
| 218 | /* Offset of next stack argument beyond the one we have seen that is |
| 219 | at the highest offset. |
| 220 | -1 if we haven't come to a stack argument yet. */ |
| 221 | long highest_offset = -1; |
| 222 | int arg_size; |
| 223 | /* Number of ints of arguments that we have printed so far. */ |
| 224 | int args_printed = 0; |
| 225 | struct cleanup *old_chain, *list_chain; |
| 226 | struct ui_stream *stb; |
| 227 | |
| 228 | stb = ui_out_stream_new (uiout); |
| 229 | old_chain = make_cleanup_ui_out_stream_delete (stb); |
| 230 | |
| 231 | if (func) |
| 232 | { |
| 233 | b = SYMBOL_BLOCK_VALUE (func); |
| 234 | |
| 235 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 236 | { |
| 237 | QUIT; |
| 238 | |
| 239 | /* Keep track of the highest stack argument offset seen, and |
| 240 | skip over any kinds of symbols we don't care about. */ |
| 241 | |
| 242 | switch (SYMBOL_CLASS (sym)) |
| 243 | { |
| 244 | case LOC_ARG: |
| 245 | case LOC_REF_ARG: |
| 246 | { |
| 247 | long current_offset = SYMBOL_VALUE (sym); |
| 248 | arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym)); |
| 249 | |
| 250 | /* Compute address of next argument by adding the size of |
| 251 | this argument and rounding to an int boundary. */ |
| 252 | current_offset = |
| 253 | ((current_offset + arg_size + sizeof (int) - 1) |
| 254 | & ~(sizeof (int) - 1)); |
| 255 | |
| 256 | /* If this is the highest offset seen yet, set highest_offset. */ |
| 257 | if (highest_offset == -1 |
| 258 | || (current_offset > highest_offset)) |
| 259 | highest_offset = current_offset; |
| 260 | |
| 261 | /* Add the number of ints we're about to print to args_printed. */ |
| 262 | args_printed += (arg_size + sizeof (int) - 1) / sizeof (int); |
| 263 | } |
| 264 | |
| 265 | /* We care about types of symbols, but don't need to keep track of |
| 266 | stack offsets in them. */ |
| 267 | case LOC_REGPARM: |
| 268 | case LOC_REGPARM_ADDR: |
| 269 | case LOC_LOCAL_ARG: |
| 270 | case LOC_BASEREG_ARG: |
| 271 | case LOC_COMPUTED_ARG: |
| 272 | break; |
| 273 | |
| 274 | /* Other types of symbols we just skip over. */ |
| 275 | default: |
| 276 | continue; |
| 277 | } |
| 278 | |
| 279 | /* We have to look up the symbol because arguments can have |
| 280 | two entries (one a parameter, one a local) and the one we |
| 281 | want is the local, which lookup_symbol will find for us. |
| 282 | This includes gcc1 (not gcc2) on the sparc when passing a |
| 283 | small structure and gcc2 when the argument type is float |
| 284 | and it is passed as a double and converted to float by |
| 285 | the prologue (in the latter case the type of the LOC_ARG |
| 286 | symbol is double and the type of the LOC_LOCAL symbol is |
| 287 | float). */ |
| 288 | /* But if the parameter name is null, don't try it. |
| 289 | Null parameter names occur on the RS/6000, for traceback tables. |
| 290 | FIXME, should we even print them? */ |
| 291 | |
| 292 | if (*DEPRECATED_SYMBOL_NAME (sym)) |
| 293 | { |
| 294 | struct symbol *nsym; |
| 295 | nsym = lookup_symbol |
| 296 | (DEPRECATED_SYMBOL_NAME (sym), |
| 297 | b, VAR_DOMAIN, (int *) NULL, (struct symtab **) NULL); |
| 298 | if (SYMBOL_CLASS (nsym) == LOC_REGISTER) |
| 299 | { |
| 300 | /* There is a LOC_ARG/LOC_REGISTER pair. This means that |
| 301 | it was passed on the stack and loaded into a register, |
| 302 | or passed in a register and stored in a stack slot. |
| 303 | GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER. |
| 304 | |
| 305 | Reasons for using the LOC_ARG: |
| 306 | (1) because find_saved_registers may be slow for remote |
| 307 | debugging, |
| 308 | (2) because registers are often re-used and stack slots |
| 309 | rarely (never?) are. Therefore using the stack slot is |
| 310 | much less likely to print garbage. |
| 311 | |
| 312 | Reasons why we might want to use the LOC_REGISTER: |
| 313 | (1) So that the backtrace prints the same value as |
| 314 | "print foo". I see no compelling reason why this needs |
| 315 | to be the case; having the backtrace print the value which |
| 316 | was passed in, and "print foo" print the value as modified |
| 317 | within the called function, makes perfect sense to me. |
| 318 | |
| 319 | Additional note: It might be nice if "info args" displayed |
| 320 | both values. |
| 321 | One more note: There is a case with sparc structure passing |
| 322 | where we need to use the LOC_REGISTER, but this is dealt with |
| 323 | by creating a single LOC_REGPARM in symbol reading. */ |
| 324 | |
| 325 | /* Leave sym (the LOC_ARG) alone. */ |
| 326 | ; |
| 327 | } |
| 328 | else |
| 329 | sym = nsym; |
| 330 | } |
| 331 | |
| 332 | /* Print the current arg. */ |
| 333 | if (!first) |
| 334 | ui_out_text (uiout, ", "); |
| 335 | ui_out_wrap_hint (uiout, " "); |
| 336 | |
| 337 | annotate_arg_begin (); |
| 338 | |
| 339 | list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, NULL); |
| 340 | fprintf_symbol_filtered (stb->stream, SYMBOL_PRINT_NAME (sym), |
| 341 | SYMBOL_LANGUAGE (sym), DMGL_PARAMS | DMGL_ANSI); |
| 342 | ui_out_field_stream (uiout, "name", stb); |
| 343 | annotate_arg_name_end (); |
| 344 | ui_out_text (uiout, "="); |
| 345 | |
| 346 | /* Avoid value_print because it will deref ref parameters. We just |
| 347 | want to print their addresses. Print ??? for args whose address |
| 348 | we do not know. We pass 2 as "recurse" to val_print because our |
| 349 | standard indentation here is 4 spaces, and val_print indents |
| 350 | 2 for each recurse. */ |
| 351 | val = read_var_value (sym, fi); |
| 352 | |
| 353 | annotate_arg_value (val == NULL ? NULL : VALUE_TYPE (val)); |
| 354 | |
| 355 | if (val) |
| 356 | { |
| 357 | val_print (VALUE_TYPE (val), VALUE_CONTENTS (val), 0, |
| 358 | VALUE_ADDRESS (val), |
| 359 | stb->stream, 0, 0, 2, Val_no_prettyprint); |
| 360 | ui_out_field_stream (uiout, "value", stb); |
| 361 | } |
| 362 | else |
| 363 | ui_out_text (uiout, "???"); |
| 364 | |
| 365 | /* Invoke ui_out_tuple_end. */ |
| 366 | do_cleanups (list_chain); |
| 367 | |
| 368 | annotate_arg_end (); |
| 369 | |
| 370 | first = 0; |
| 371 | } |
| 372 | } |
| 373 | |
| 374 | /* Don't print nameless args in situations where we don't know |
| 375 | enough about the stack to find them. */ |
| 376 | if (num != -1) |
| 377 | { |
| 378 | long start; |
| 379 | |
| 380 | if (highest_offset == -1) |
| 381 | start = FRAME_ARGS_SKIP; |
| 382 | else |
| 383 | start = highest_offset; |
| 384 | |
| 385 | print_frame_nameless_args (fi, start, num - args_printed, |
| 386 | first, stream); |
| 387 | } |
| 388 | do_cleanups (old_chain); |
| 389 | } |
| 390 | |
| 391 | /* Pass the args the way catch_errors wants them. */ |
| 392 | |
| 393 | static int |
| 394 | print_args_stub (void *args) |
| 395 | { |
| 396 | int numargs; |
| 397 | struct print_args_args *p = (struct print_args_args *) args; |
| 398 | |
| 399 | if (FRAME_NUM_ARGS_P ()) |
| 400 | { |
| 401 | numargs = FRAME_NUM_ARGS (p->fi); |
| 402 | gdb_assert (numargs >= 0); |
| 403 | } |
| 404 | else |
| 405 | numargs = -1; |
| 406 | print_frame_args (p->func, p->fi, numargs, p->stream); |
| 407 | return 0; |
| 408 | } |
| 409 | |
| 410 | /* Print information about a frame for frame "fi" at level "level". |
| 411 | Used in "where" output, also used to emit breakpoint or step |
| 412 | messages. |
| 413 | LEVEL is the level of the frame, or -1 if it is the |
| 414 | innermost frame but we don't want to print the level. |
| 415 | The meaning of the SOURCE argument is: |
| 416 | SRC_LINE: Print only source line |
| 417 | LOCATION: Print only location |
| 418 | LOC_AND_SRC: Print location and source line. */ |
| 419 | |
| 420 | void |
| 421 | print_frame_info (struct frame_info *fi, int level, int source, int args) |
| 422 | { |
| 423 | struct symtab_and_line sal; |
| 424 | int source_print; |
| 425 | int location_print; |
| 426 | |
| 427 | if (get_frame_type (fi) == DUMMY_FRAME |
| 428 | || get_frame_type (fi) == SIGTRAMP_FRAME) |
| 429 | { |
| 430 | struct cleanup *uiout_cleanup |
| 431 | = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| 432 | |
| 433 | annotate_frame_begin (level == -1 ? 0 : level, get_frame_pc (fi)); |
| 434 | |
| 435 | /* Do this regardless of SOURCE because we don't have any source |
| 436 | to list for this frame. */ |
| 437 | if (level >= 0) |
| 438 | { |
| 439 | ui_out_text (uiout, "#"); |
| 440 | ui_out_field_fmt_int (uiout, 2, ui_left, "level", level); |
| 441 | } |
| 442 | if (ui_out_is_mi_like_p (uiout)) |
| 443 | { |
| 444 | annotate_frame_address (); |
| 445 | ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); |
| 446 | annotate_frame_address_end (); |
| 447 | } |
| 448 | |
| 449 | if (get_frame_type (fi) == DUMMY_FRAME) |
| 450 | { |
| 451 | annotate_function_call (); |
| 452 | ui_out_field_string (uiout, "func", "<function called from gdb>"); |
| 453 | } |
| 454 | else if (get_frame_type (fi) == SIGTRAMP_FRAME) |
| 455 | { |
| 456 | annotate_signal_handler_caller (); |
| 457 | ui_out_field_string (uiout, "func", "<signal handler called>"); |
| 458 | } |
| 459 | ui_out_text (uiout, "\n"); |
| 460 | annotate_frame_end (); |
| 461 | |
| 462 | do_cleanups (uiout_cleanup); |
| 463 | return; |
| 464 | } |
| 465 | |
| 466 | /* If fi is not the innermost frame, that normally means that fi->pc |
| 467 | points to *after* the call instruction, and we want to get the |
| 468 | line containing the call, never the next line. But if the next |
| 469 | frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame |
| 470 | was not entered as the result of a call, and we want to get the |
| 471 | line containing fi->pc. */ |
| 472 | find_frame_sal (fi, &sal); |
| 473 | |
| 474 | location_print = (source == LOCATION |
| 475 | || source == LOC_AND_ADDRESS |
| 476 | || source == SRC_AND_LOC); |
| 477 | |
| 478 | if (location_print || !sal.symtab) |
| 479 | print_frame (fi, level, source, args, sal); |
| 480 | |
| 481 | source_print = (source == SRC_LINE || source == SRC_AND_LOC); |
| 482 | |
| 483 | if (sal.symtab) |
| 484 | set_current_source_symtab_and_line (&sal); |
| 485 | |
| 486 | if (source_print && sal.symtab) |
| 487 | { |
| 488 | struct symtab_and_line cursal; |
| 489 | int done = 0; |
| 490 | int mid_statement = (source == SRC_LINE) && (get_frame_pc (fi) != sal.pc); |
| 491 | |
| 492 | if (annotation_level) |
| 493 | done = identify_source_line (sal.symtab, sal.line, mid_statement, |
| 494 | get_frame_pc (fi)); |
| 495 | if (!done) |
| 496 | { |
| 497 | if (print_frame_info_listing_hook) |
| 498 | print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0); |
| 499 | else |
| 500 | { |
| 501 | /* We used to do this earlier, but that is clearly |
| 502 | wrong. This function is used by many different |
| 503 | parts of gdb, including normal_stop in infrun.c, |
| 504 | which uses this to print out the current PC |
| 505 | when we stepi/nexti into the middle of a source |
| 506 | line. Only the command line really wants this |
| 507 | behavior. Other UIs probably would like the |
| 508 | ability to decide for themselves if it is desired. */ |
| 509 | if (addressprint && mid_statement) |
| 510 | { |
| 511 | ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); |
| 512 | ui_out_text (uiout, "\t"); |
| 513 | } |
| 514 | |
| 515 | print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); |
| 516 | } |
| 517 | } |
| 518 | /* Make sure we have at least a default source file */ |
| 519 | set_default_source_symtab_and_line (); |
| 520 | cursal = get_current_source_symtab_and_line (); |
| 521 | cursal.line = max (sal.line - get_lines_to_list () / 2, 1); |
| 522 | set_current_source_symtab_and_line (&cursal); |
| 523 | } |
| 524 | |
| 525 | if (source != 0) |
| 526 | set_default_breakpoint (1, get_frame_pc (fi), sal.symtab, sal.line); |
| 527 | |
| 528 | annotate_frame_end (); |
| 529 | |
| 530 | gdb_flush (gdb_stdout); |
| 531 | } |
| 532 | |
| 533 | static void |
| 534 | print_frame (struct frame_info *fi, |
| 535 | int level, |
| 536 | int source, |
| 537 | int args, |
| 538 | struct symtab_and_line sal) |
| 539 | { |
| 540 | struct symbol *func; |
| 541 | char *funname = 0; |
| 542 | enum language funlang = language_unknown; |
| 543 | struct ui_stream *stb; |
| 544 | struct cleanup *old_chain; |
| 545 | struct cleanup *list_chain; |
| 546 | |
| 547 | stb = ui_out_stream_new (uiout); |
| 548 | old_chain = make_cleanup_ui_out_stream_delete (stb); |
| 549 | |
| 550 | func = find_pc_function (get_frame_address_in_block (fi)); |
| 551 | if (func) |
| 552 | { |
| 553 | /* In certain pathological cases, the symtabs give the wrong |
| 554 | function (when we are in the first function in a file which |
| 555 | is compiled without debugging symbols, the previous function |
| 556 | is compiled with debugging symbols, and the "foo.o" symbol |
| 557 | that is supposed to tell us where the file with debugging symbols |
| 558 | ends has been truncated by ar because it is longer than 15 |
| 559 | characters). This also occurs if the user uses asm() to create |
| 560 | a function but not stabs for it (in a file compiled -g). |
| 561 | |
| 562 | So look in the minimal symbol tables as well, and if it comes |
| 563 | up with a larger address for the function use that instead. |
| 564 | I don't think this can ever cause any problems; there shouldn't |
| 565 | be any minimal symbols in the middle of a function; if this is |
| 566 | ever changed many parts of GDB will need to be changed (and we'll |
| 567 | create a find_pc_minimal_function or some such). */ |
| 568 | |
| 569 | struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi)); |
| 570 | if (msymbol != NULL |
| 571 | && (SYMBOL_VALUE_ADDRESS (msymbol) |
| 572 | > BLOCK_START (SYMBOL_BLOCK_VALUE (func)))) |
| 573 | { |
| 574 | #if 0 |
| 575 | /* There is no particular reason to think the line number |
| 576 | information is wrong. Someone might have just put in |
| 577 | a label with asm() but left the line numbers alone. */ |
| 578 | /* In this case we have no way of knowing the source file |
| 579 | and line number, so don't print them. */ |
| 580 | sal.symtab = 0; |
| 581 | #endif |
| 582 | /* We also don't know anything about the function besides |
| 583 | its address and name. */ |
| 584 | func = 0; |
| 585 | funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| 586 | funlang = SYMBOL_LANGUAGE (msymbol); |
| 587 | } |
| 588 | else |
| 589 | { |
| 590 | /* I'd like to use SYMBOL_PRINT_NAME() here, to display the |
| 591 | demangled name that we already have stored in the symbol |
| 592 | table, but we stored a version with DMGL_PARAMS turned |
| 593 | on, and here we don't want to display parameters. So call |
| 594 | the demangler again, with DMGL_ANSI only. (Yes, I know |
| 595 | that printf_symbol_filtered() will again try to demangle |
| 596 | the name on the fly, but the issue is that if |
| 597 | cplus_demangle() fails here, it'll fail there too. So we |
| 598 | want to catch the failure ("demangled==NULL" case below) |
| 599 | here, while we still have our hands on the function |
| 600 | symbol.) */ |
| 601 | char *demangled; |
| 602 | funname = DEPRECATED_SYMBOL_NAME (func); |
| 603 | funlang = SYMBOL_LANGUAGE (func); |
| 604 | if (funlang == language_cplus) |
| 605 | { |
| 606 | demangled = cplus_demangle (funname, DMGL_ANSI); |
| 607 | if (demangled == NULL) |
| 608 | /* If the demangler fails, try the demangled name from |
| 609 | the symbol table. This'll have parameters, but |
| 610 | that's preferable to diplaying a mangled name. */ |
| 611 | funname = SYMBOL_PRINT_NAME (func); |
| 612 | } |
| 613 | } |
| 614 | } |
| 615 | else |
| 616 | { |
| 617 | struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi)); |
| 618 | if (msymbol != NULL) |
| 619 | { |
| 620 | funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| 621 | funlang = SYMBOL_LANGUAGE (msymbol); |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | annotate_frame_begin (level == -1 ? 0 : level, get_frame_pc (fi)); |
| 626 | |
| 627 | list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| 628 | |
| 629 | if (level >= 0) |
| 630 | { |
| 631 | ui_out_text (uiout, "#"); |
| 632 | ui_out_field_fmt_int (uiout, 2, ui_left, "level", level); |
| 633 | } |
| 634 | if (addressprint) |
| 635 | if (get_frame_pc (fi) != sal.pc |
| 636 | || !sal.symtab |
| 637 | || source == LOC_AND_ADDRESS) |
| 638 | { |
| 639 | annotate_frame_address (); |
| 640 | ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi)); |
| 641 | annotate_frame_address_end (); |
| 642 | ui_out_text (uiout, " in "); |
| 643 | } |
| 644 | annotate_frame_function_name (); |
| 645 | fprintf_symbol_filtered (stb->stream, funname ? funname : "??", funlang, |
| 646 | DMGL_ANSI); |
| 647 | ui_out_field_stream (uiout, "func", stb); |
| 648 | ui_out_wrap_hint (uiout, " "); |
| 649 | annotate_frame_args (); |
| 650 | |
| 651 | ui_out_text (uiout, " ("); |
| 652 | if (args) |
| 653 | { |
| 654 | struct print_args_args args; |
| 655 | struct cleanup *args_list_chain; |
| 656 | args.fi = fi; |
| 657 | args.func = func; |
| 658 | args.stream = gdb_stdout; |
| 659 | args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args"); |
| 660 | catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL); |
| 661 | /* FIXME: args must be a list. If one argument is a string it will |
| 662 | have " that will not be properly escaped. */ |
| 663 | /* Invoke ui_out_tuple_end. */ |
| 664 | do_cleanups (args_list_chain); |
| 665 | QUIT; |
| 666 | } |
| 667 | ui_out_text (uiout, ")"); |
| 668 | if (sal.symtab && sal.symtab->filename) |
| 669 | { |
| 670 | annotate_frame_source_begin (); |
| 671 | ui_out_wrap_hint (uiout, " "); |
| 672 | ui_out_text (uiout, " at "); |
| 673 | annotate_frame_source_file (); |
| 674 | ui_out_field_string (uiout, "file", sal.symtab->filename); |
| 675 | annotate_frame_source_file_end (); |
| 676 | ui_out_text (uiout, ":"); |
| 677 | annotate_frame_source_line (); |
| 678 | ui_out_field_int (uiout, "line", sal.line); |
| 679 | annotate_frame_source_end (); |
| 680 | } |
| 681 | |
| 682 | #ifdef PC_SOLIB |
| 683 | if (!funname || (!sal.symtab || !sal.symtab->filename)) |
| 684 | { |
| 685 | char *lib = PC_SOLIB (get_frame_pc (fi)); |
| 686 | if (lib) |
| 687 | { |
| 688 | annotate_frame_where (); |
| 689 | ui_out_wrap_hint (uiout, " "); |
| 690 | ui_out_text (uiout, " from "); |
| 691 | ui_out_field_string (uiout, "from", lib); |
| 692 | } |
| 693 | } |
| 694 | #endif /* PC_SOLIB */ |
| 695 | |
| 696 | /* do_cleanups will call ui_out_tuple_end() for us. */ |
| 697 | do_cleanups (list_chain); |
| 698 | ui_out_text (uiout, "\n"); |
| 699 | do_cleanups (old_chain); |
| 700 | } |
| 701 | \f |
| 702 | /* Show the frame info. If this is the tui, it will be shown in |
| 703 | the source display otherwise, nothing is done */ |
| 704 | void |
| 705 | show_stack_frame (struct frame_info *fi) |
| 706 | { |
| 707 | } |
| 708 | \f |
| 709 | |
| 710 | /* Read a frame specification in whatever the appropriate format is. |
| 711 | Call error() if the specification is in any way invalid (i.e. |
| 712 | this function never returns NULL). */ |
| 713 | |
| 714 | struct frame_info * |
| 715 | parse_frame_specification (char *frame_exp) |
| 716 | { |
| 717 | int numargs = 0; |
| 718 | #define MAXARGS 4 |
| 719 | CORE_ADDR args[MAXARGS]; |
| 720 | int level; |
| 721 | |
| 722 | if (frame_exp) |
| 723 | { |
| 724 | char *addr_string, *p; |
| 725 | struct cleanup *tmp_cleanup; |
| 726 | |
| 727 | while (*frame_exp == ' ') |
| 728 | frame_exp++; |
| 729 | |
| 730 | while (*frame_exp) |
| 731 | { |
| 732 | if (numargs > MAXARGS) |
| 733 | error ("Too many args in frame specification"); |
| 734 | /* Parse an argument. */ |
| 735 | for (p = frame_exp; *p && *p != ' '; p++) |
| 736 | ; |
| 737 | addr_string = savestring (frame_exp, p - frame_exp); |
| 738 | |
| 739 | { |
| 740 | struct value *vp; |
| 741 | |
| 742 | tmp_cleanup = make_cleanup (xfree, addr_string); |
| 743 | |
| 744 | /* NOTE: we call parse_and_eval and then both |
| 745 | value_as_long and value_as_address rather than calling |
| 746 | parse_and_eval_long and parse_and_eval_address because |
| 747 | of the issue of potential side effects from evaluating |
| 748 | the expression. */ |
| 749 | vp = parse_and_eval (addr_string); |
| 750 | if (numargs == 0) |
| 751 | level = value_as_long (vp); |
| 752 | |
| 753 | args[numargs++] = value_as_address (vp); |
| 754 | do_cleanups (tmp_cleanup); |
| 755 | } |
| 756 | |
| 757 | /* Skip spaces, move to possible next arg. */ |
| 758 | while (*p == ' ') |
| 759 | p++; |
| 760 | frame_exp = p; |
| 761 | } |
| 762 | } |
| 763 | |
| 764 | switch (numargs) |
| 765 | { |
| 766 | case 0: |
| 767 | if (deprecated_selected_frame == NULL) |
| 768 | error ("No selected frame."); |
| 769 | return deprecated_selected_frame; |
| 770 | /* NOTREACHED */ |
| 771 | case 1: |
| 772 | { |
| 773 | struct frame_info *fid = |
| 774 | find_relative_frame (get_current_frame (), &level); |
| 775 | struct frame_info *tfid; |
| 776 | |
| 777 | if (level == 0) |
| 778 | /* find_relative_frame was successful */ |
| 779 | return fid; |
| 780 | |
| 781 | /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications |
| 782 | take at least 2 addresses. It is important to detect this case |
| 783 | here so that "frame 100" does not give a confusing error message |
| 784 | like "frame specification requires two addresses". This of course |
| 785 | does not solve the "frame 100" problem for machines on which |
| 786 | a frame specification can be made with one address. To solve |
| 787 | that, we need a new syntax for a specifying a frame by address. |
| 788 | I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for |
| 789 | two args, etc.), but people might think that is too much typing, |
| 790 | so I guess *0x23,0x45 would be a possible alternative (commas |
| 791 | really should be used instead of spaces to delimit; using spaces |
| 792 | normally works in an expression). */ |
| 793 | #ifdef SETUP_ARBITRARY_FRAME |
| 794 | error ("No frame %s", paddr_d (args[0])); |
| 795 | #endif |
| 796 | |
| 797 | /* If (s)he specifies the frame with an address, he deserves what |
| 798 | (s)he gets. Still, give the highest one that matches. */ |
| 799 | |
| 800 | for (fid = get_current_frame (); |
| 801 | fid && get_frame_base (fid) != args[0]; |
| 802 | fid = get_prev_frame (fid)) |
| 803 | ; |
| 804 | |
| 805 | if (fid) |
| 806 | while ((tfid = get_prev_frame (fid)) && |
| 807 | (get_frame_base (tfid) == args[0])) |
| 808 | fid = tfid; |
| 809 | |
| 810 | /* We couldn't identify the frame as an existing frame, but |
| 811 | perhaps we can create one with a single argument. */ |
| 812 | } |
| 813 | |
| 814 | default: |
| 815 | #ifdef SETUP_ARBITRARY_FRAME |
| 816 | return SETUP_ARBITRARY_FRAME (numargs, args); |
| 817 | #else |
| 818 | /* Usual case. Do it here rather than have everyone supply |
| 819 | a SETUP_ARBITRARY_FRAME that does this. */ |
| 820 | if (numargs == 1) |
| 821 | return create_new_frame (args[0], 0); |
| 822 | error ("Too many args in frame specification"); |
| 823 | #endif |
| 824 | /* NOTREACHED */ |
| 825 | } |
| 826 | /* NOTREACHED */ |
| 827 | } |
| 828 | |
| 829 | /* Print verbosely the selected frame or the frame at address ADDR. |
| 830 | This means absolutely all information in the frame is printed. */ |
| 831 | |
| 832 | static void |
| 833 | frame_info (char *addr_exp, int from_tty) |
| 834 | { |
| 835 | struct frame_info *fi; |
| 836 | struct symtab_and_line sal; |
| 837 | struct symbol *func; |
| 838 | struct symtab *s; |
| 839 | struct frame_info *calling_frame_info; |
| 840 | int i, count, numregs; |
| 841 | char *funname = 0; |
| 842 | enum language funlang = language_unknown; |
| 843 | const char *pc_regname; |
| 844 | |
| 845 | if (!target_has_stack) |
| 846 | error ("No stack."); |
| 847 | |
| 848 | /* Name of the value returned by get_frame_pc(). Per comments, "pc" |
| 849 | is not a good name. */ |
| 850 | if (PC_REGNUM >= 0) |
| 851 | /* OK, this is weird. The PC_REGNUM hardware register's value can |
| 852 | easily not match that of the internal value returned by |
| 853 | get_frame_pc(). */ |
| 854 | pc_regname = REGISTER_NAME (PC_REGNUM); |
| 855 | else |
| 856 | /* But then, this is weird to. Even without PC_REGNUM, an |
| 857 | architectures will often have a hardware register called "pc", |
| 858 | and that register's value, again, can easily not match |
| 859 | get_frame_pc(). */ |
| 860 | pc_regname = "pc"; |
| 861 | |
| 862 | fi = parse_frame_specification (addr_exp); |
| 863 | if (fi == NULL) |
| 864 | error ("Invalid frame specified."); |
| 865 | |
| 866 | find_frame_sal (fi, &sal); |
| 867 | func = get_frame_function (fi); |
| 868 | /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain |
| 869 | the same value. */ |
| 870 | s = find_pc_symtab (get_frame_pc (fi)); |
| 871 | if (func) |
| 872 | { |
| 873 | /* I'd like to use SYMBOL_PRINT_NAME() here, to display |
| 874 | * the demangled name that we already have stored in |
| 875 | * the symbol table, but we stored a version with |
| 876 | * DMGL_PARAMS turned on, and here we don't want |
| 877 | * to display parameters. So call the demangler again, |
| 878 | * with DMGL_ANSI only. RT |
| 879 | * (Yes, I know that printf_symbol_filtered() will |
| 880 | * again try to demangle the name on the fly, but |
| 881 | * the issue is that if cplus_demangle() fails here, |
| 882 | * it'll fail there too. So we want to catch the failure |
| 883 | * ("demangled==NULL" case below) here, while we still |
| 884 | * have our hands on the function symbol.) |
| 885 | */ |
| 886 | char *demangled; |
| 887 | funname = DEPRECATED_SYMBOL_NAME (func); |
| 888 | funlang = SYMBOL_LANGUAGE (func); |
| 889 | if (funlang == language_cplus) |
| 890 | { |
| 891 | demangled = cplus_demangle (funname, DMGL_ANSI); |
| 892 | /* If the demangler fails, try the demangled name |
| 893 | * from the symbol table. This'll have parameters, |
| 894 | * but that's preferable to diplaying a mangled name. |
| 895 | */ |
| 896 | if (demangled == NULL) |
| 897 | funname = SYMBOL_PRINT_NAME (func); |
| 898 | } |
| 899 | } |
| 900 | else |
| 901 | { |
| 902 | struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_pc (fi)); |
| 903 | if (msymbol != NULL) |
| 904 | { |
| 905 | funname = DEPRECATED_SYMBOL_NAME (msymbol); |
| 906 | funlang = SYMBOL_LANGUAGE (msymbol); |
| 907 | } |
| 908 | } |
| 909 | calling_frame_info = get_prev_frame (fi); |
| 910 | |
| 911 | if (!addr_exp && frame_relative_level (deprecated_selected_frame) >= 0) |
| 912 | { |
| 913 | printf_filtered ("Stack level %d, frame at ", |
| 914 | frame_relative_level (deprecated_selected_frame)); |
| 915 | print_address_numeric (get_frame_base (fi), 1, gdb_stdout); |
| 916 | printf_filtered (":\n"); |
| 917 | } |
| 918 | else |
| 919 | { |
| 920 | printf_filtered ("Stack frame at "); |
| 921 | print_address_numeric (get_frame_base (fi), 1, gdb_stdout); |
| 922 | printf_filtered (":\n"); |
| 923 | } |
| 924 | printf_filtered (" %s = ", pc_regname); |
| 925 | print_address_numeric (get_frame_pc (fi), 1, gdb_stdout); |
| 926 | |
| 927 | wrap_here (" "); |
| 928 | if (funname) |
| 929 | { |
| 930 | printf_filtered (" in "); |
| 931 | fprintf_symbol_filtered (gdb_stdout, funname, funlang, |
| 932 | DMGL_ANSI | DMGL_PARAMS); |
| 933 | } |
| 934 | wrap_here (" "); |
| 935 | if (sal.symtab) |
| 936 | printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line); |
| 937 | puts_filtered ("; "); |
| 938 | wrap_here (" "); |
| 939 | printf_filtered ("saved %s ", pc_regname); |
| 940 | print_address_numeric (frame_pc_unwind (fi), 1, gdb_stdout); |
| 941 | printf_filtered ("\n"); |
| 942 | |
| 943 | { |
| 944 | int frameless; |
| 945 | frameless = (DEPRECATED_FRAMELESS_FUNCTION_INVOCATION_P () |
| 946 | && DEPRECATED_FRAMELESS_FUNCTION_INVOCATION (fi)); |
| 947 | if (frameless) |
| 948 | printf_filtered (" (FRAMELESS),"); |
| 949 | } |
| 950 | |
| 951 | if (calling_frame_info) |
| 952 | { |
| 953 | printf_filtered (" called by frame at "); |
| 954 | print_address_numeric (get_frame_base (calling_frame_info), |
| 955 | 1, gdb_stdout); |
| 956 | } |
| 957 | if (get_next_frame (fi) && calling_frame_info) |
| 958 | puts_filtered (","); |
| 959 | wrap_here (" "); |
| 960 | if (get_next_frame (fi)) |
| 961 | { |
| 962 | printf_filtered (" caller of frame at "); |
| 963 | print_address_numeric (get_frame_base (get_next_frame (fi)), 1, |
| 964 | gdb_stdout); |
| 965 | } |
| 966 | if (get_next_frame (fi) || calling_frame_info) |
| 967 | puts_filtered ("\n"); |
| 968 | if (s) |
| 969 | printf_filtered (" source language %s.\n", |
| 970 | language_str (s->language)); |
| 971 | |
| 972 | { |
| 973 | /* Address of the argument list for this frame, or 0. */ |
| 974 | CORE_ADDR arg_list = get_frame_args_address (fi); |
| 975 | /* Number of args for this frame, or -1 if unknown. */ |
| 976 | int numargs; |
| 977 | |
| 978 | if (arg_list == 0) |
| 979 | printf_filtered (" Arglist at unknown address.\n"); |
| 980 | else |
| 981 | { |
| 982 | printf_filtered (" Arglist at "); |
| 983 | print_address_numeric (arg_list, 1, gdb_stdout); |
| 984 | printf_filtered (","); |
| 985 | |
| 986 | if (!FRAME_NUM_ARGS_P ()) |
| 987 | { |
| 988 | numargs = -1; |
| 989 | puts_filtered (" args: "); |
| 990 | } |
| 991 | else |
| 992 | { |
| 993 | numargs = FRAME_NUM_ARGS (fi); |
| 994 | gdb_assert (numargs >= 0); |
| 995 | if (numargs == 0) |
| 996 | puts_filtered (" no args."); |
| 997 | else if (numargs == 1) |
| 998 | puts_filtered (" 1 arg: "); |
| 999 | else |
| 1000 | printf_filtered (" %d args: ", numargs); |
| 1001 | } |
| 1002 | print_frame_args (func, fi, numargs, gdb_stdout); |
| 1003 | puts_filtered ("\n"); |
| 1004 | } |
| 1005 | } |
| 1006 | { |
| 1007 | /* Address of the local variables for this frame, or 0. */ |
| 1008 | CORE_ADDR arg_list = get_frame_locals_address (fi); |
| 1009 | |
| 1010 | if (arg_list == 0) |
| 1011 | printf_filtered (" Locals at unknown address,"); |
| 1012 | else |
| 1013 | { |
| 1014 | printf_filtered (" Locals at "); |
| 1015 | print_address_numeric (arg_list, 1, gdb_stdout); |
| 1016 | printf_filtered (","); |
| 1017 | } |
| 1018 | } |
| 1019 | |
| 1020 | if (DEPRECATED_FRAME_INIT_SAVED_REGS_P () |
| 1021 | && deprecated_get_frame_saved_regs (fi) == NULL) |
| 1022 | DEPRECATED_FRAME_INIT_SAVED_REGS (fi); |
| 1023 | /* Print as much information as possible on the location of all the |
| 1024 | registers. */ |
| 1025 | { |
| 1026 | enum lval_type lval; |
| 1027 | int optimized; |
| 1028 | CORE_ADDR addr; |
| 1029 | int realnum; |
| 1030 | int count; |
| 1031 | int i; |
| 1032 | int need_nl = 1; |
| 1033 | |
| 1034 | /* The sp is special; what's displayed isn't the save address, but |
| 1035 | the value of the previous frame's sp. This is a legacy thing, |
| 1036 | at one stage the frame cached the previous frame's SP instead |
| 1037 | of its address, hence it was easiest to just display the cached |
| 1038 | value. */ |
| 1039 | if (SP_REGNUM >= 0) |
| 1040 | { |
| 1041 | /* Find out the location of the saved stack pointer with out |
| 1042 | actually evaluating it. */ |
| 1043 | frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr, |
| 1044 | &realnum, NULL); |
| 1045 | if (!optimized && lval == not_lval) |
| 1046 | { |
| 1047 | char value[MAX_REGISTER_SIZE]; |
| 1048 | CORE_ADDR sp; |
| 1049 | frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr, |
| 1050 | &realnum, value); |
| 1051 | /* NOTE: cagney/2003-05-22: This is assuming that the |
| 1052 | stack pointer was packed as an unsigned integer. That |
| 1053 | may or may not be valid. */ |
| 1054 | sp = extract_unsigned_integer (value, DEPRECATED_REGISTER_RAW_SIZE (SP_REGNUM)); |
| 1055 | printf_filtered (" Previous frame's sp is "); |
| 1056 | print_address_numeric (sp, 1, gdb_stdout); |
| 1057 | printf_filtered ("\n"); |
| 1058 | need_nl = 0; |
| 1059 | } |
| 1060 | else if (!optimized && lval == lval_memory) |
| 1061 | { |
| 1062 | printf_filtered (" Previous frame's sp at "); |
| 1063 | print_address_numeric (addr, 1, gdb_stdout); |
| 1064 | printf_filtered ("\n"); |
| 1065 | need_nl = 0; |
| 1066 | } |
| 1067 | else if (!optimized && lval == lval_register) |
| 1068 | { |
| 1069 | printf_filtered (" Previous frame's sp in %s\n", |
| 1070 | REGISTER_NAME (realnum)); |
| 1071 | need_nl = 0; |
| 1072 | } |
| 1073 | /* else keep quiet. */ |
| 1074 | } |
| 1075 | |
| 1076 | count = 0; |
| 1077 | numregs = NUM_REGS + NUM_PSEUDO_REGS; |
| 1078 | for (i = 0; i < numregs; i++) |
| 1079 | if (i != SP_REGNUM |
| 1080 | && gdbarch_register_reggroup_p (current_gdbarch, i, all_reggroup)) |
| 1081 | { |
| 1082 | /* Find out the location of the saved register without |
| 1083 | fetching the corresponding value. */ |
| 1084 | frame_register_unwind (fi, i, &optimized, &lval, &addr, &realnum, |
| 1085 | NULL); |
| 1086 | /* For moment, only display registers that were saved on the |
| 1087 | stack. */ |
| 1088 | if (!optimized && lval == lval_memory) |
| 1089 | { |
| 1090 | if (count == 0) |
| 1091 | puts_filtered (" Saved registers:\n "); |
| 1092 | else |
| 1093 | puts_filtered (","); |
| 1094 | wrap_here (" "); |
| 1095 | printf_filtered (" %s at ", REGISTER_NAME (i)); |
| 1096 | print_address_numeric (addr, 1, gdb_stdout); |
| 1097 | count++; |
| 1098 | } |
| 1099 | } |
| 1100 | if (count || need_nl) |
| 1101 | puts_filtered ("\n"); |
| 1102 | } |
| 1103 | } |
| 1104 | |
| 1105 | #if 0 |
| 1106 | /* Set a limit on the number of frames printed by default in a |
| 1107 | backtrace. */ |
| 1108 | |
| 1109 | static int backtrace_limit; |
| 1110 | |
| 1111 | static void |
| 1112 | set_backtrace_limit_command (char *count_exp, int from_tty) |
| 1113 | { |
| 1114 | int count = parse_and_eval_long (count_exp); |
| 1115 | |
| 1116 | if (count < 0) |
| 1117 | error ("Negative argument not meaningful as backtrace limit."); |
| 1118 | |
| 1119 | backtrace_limit = count; |
| 1120 | } |
| 1121 | |
| 1122 | static void |
| 1123 | backtrace_limit_info (char *arg, int from_tty) |
| 1124 | { |
| 1125 | if (arg) |
| 1126 | error ("\"Info backtrace-limit\" takes no arguments."); |
| 1127 | |
| 1128 | printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit); |
| 1129 | } |
| 1130 | #endif |
| 1131 | |
| 1132 | /* Print briefly all stack frames or just the innermost COUNT frames. */ |
| 1133 | |
| 1134 | static void backtrace_command_1 (char *count_exp, int show_locals, |
| 1135 | int from_tty); |
| 1136 | static void |
| 1137 | backtrace_command_1 (char *count_exp, int show_locals, int from_tty) |
| 1138 | { |
| 1139 | struct frame_info *fi; |
| 1140 | int count; |
| 1141 | int i; |
| 1142 | struct frame_info *trailing; |
| 1143 | int trailing_level; |
| 1144 | |
| 1145 | if (!target_has_stack) |
| 1146 | error ("No stack."); |
| 1147 | |
| 1148 | /* The following code must do two things. First, it must |
| 1149 | set the variable TRAILING to the frame from which we should start |
| 1150 | printing. Second, it must set the variable count to the number |
| 1151 | of frames which we should print, or -1 if all of them. */ |
| 1152 | trailing = get_current_frame (); |
| 1153 | |
| 1154 | /* The target can be in a state where there is no valid frames |
| 1155 | (e.g., just connected). */ |
| 1156 | if (trailing == NULL) |
| 1157 | error ("No stack."); |
| 1158 | |
| 1159 | trailing_level = 0; |
| 1160 | if (count_exp) |
| 1161 | { |
| 1162 | count = parse_and_eval_long (count_exp); |
| 1163 | if (count < 0) |
| 1164 | { |
| 1165 | struct frame_info *current; |
| 1166 | |
| 1167 | count = -count; |
| 1168 | |
| 1169 | current = trailing; |
| 1170 | while (current && count--) |
| 1171 | { |
| 1172 | QUIT; |
| 1173 | current = get_prev_frame (current); |
| 1174 | } |
| 1175 | |
| 1176 | /* Will stop when CURRENT reaches the top of the stack. TRAILING |
| 1177 | will be COUNT below it. */ |
| 1178 | while (current) |
| 1179 | { |
| 1180 | QUIT; |
| 1181 | trailing = get_prev_frame (trailing); |
| 1182 | current = get_prev_frame (current); |
| 1183 | trailing_level++; |
| 1184 | } |
| 1185 | |
| 1186 | count = -1; |
| 1187 | } |
| 1188 | } |
| 1189 | else |
| 1190 | count = -1; |
| 1191 | |
| 1192 | if (info_verbose) |
| 1193 | { |
| 1194 | struct partial_symtab *ps; |
| 1195 | |
| 1196 | /* Read in symbols for all of the frames. Need to do this in |
| 1197 | a separate pass so that "Reading in symbols for xxx" messages |
| 1198 | don't screw up the appearance of the backtrace. Also |
| 1199 | if people have strong opinions against reading symbols for |
| 1200 | backtrace this may have to be an option. */ |
| 1201 | i = count; |
| 1202 | for (fi = trailing; |
| 1203 | fi != NULL && i--; |
| 1204 | fi = get_prev_frame (fi)) |
| 1205 | { |
| 1206 | QUIT; |
| 1207 | ps = find_pc_psymtab (get_frame_address_in_block (fi)); |
| 1208 | if (ps) |
| 1209 | PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */ |
| 1210 | } |
| 1211 | } |
| 1212 | |
| 1213 | for (i = 0, fi = trailing; |
| 1214 | fi && count--; |
| 1215 | i++, fi = get_prev_frame (fi)) |
| 1216 | { |
| 1217 | QUIT; |
| 1218 | |
| 1219 | /* Don't use print_stack_frame; if an error() occurs it probably |
| 1220 | means further attempts to backtrace would fail (on the other |
| 1221 | hand, perhaps the code does or could be fixed to make sure |
| 1222 | the frame->prev field gets set to NULL in that case). */ |
| 1223 | print_frame_info (fi, trailing_level + i, 0, 1); |
| 1224 | if (show_locals) |
| 1225 | print_frame_local_vars (fi, 1, gdb_stdout); |
| 1226 | } |
| 1227 | |
| 1228 | /* If we've stopped before the end, mention that. */ |
| 1229 | if (fi && from_tty) |
| 1230 | printf_filtered ("(More stack frames follow...)\n"); |
| 1231 | } |
| 1232 | |
| 1233 | static void |
| 1234 | backtrace_command (char *arg, int from_tty) |
| 1235 | { |
| 1236 | struct cleanup *old_chain = (struct cleanup *) NULL; |
| 1237 | char **argv = (char **) NULL; |
| 1238 | int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0; |
| 1239 | char *argPtr = arg; |
| 1240 | |
| 1241 | if (arg != (char *) NULL) |
| 1242 | { |
| 1243 | int i; |
| 1244 | |
| 1245 | argv = buildargv (arg); |
| 1246 | old_chain = make_cleanup_freeargv (argv); |
| 1247 | argc = 0; |
| 1248 | for (i = 0; (argv[i] != (char *) NULL); i++) |
| 1249 | { |
| 1250 | unsigned int j; |
| 1251 | |
| 1252 | for (j = 0; (j < strlen (argv[i])); j++) |
| 1253 | argv[i][j] = tolower (argv[i][j]); |
| 1254 | |
| 1255 | if (argIndicatingFullTrace < 0 && subset_compare (argv[i], "full")) |
| 1256 | argIndicatingFullTrace = argc; |
| 1257 | else |
| 1258 | { |
| 1259 | argc++; |
| 1260 | totArgLen += strlen (argv[i]); |
| 1261 | } |
| 1262 | } |
| 1263 | totArgLen += argc; |
| 1264 | if (argIndicatingFullTrace >= 0) |
| 1265 | { |
| 1266 | if (totArgLen > 0) |
| 1267 | { |
| 1268 | argPtr = (char *) xmalloc (totArgLen + 1); |
| 1269 | if (!argPtr) |
| 1270 | nomem (0); |
| 1271 | else |
| 1272 | { |
| 1273 | memset (argPtr, 0, totArgLen + 1); |
| 1274 | for (i = 0; (i < (argc + 1)); i++) |
| 1275 | { |
| 1276 | if (i != argIndicatingFullTrace) |
| 1277 | { |
| 1278 | strcat (argPtr, argv[i]); |
| 1279 | strcat (argPtr, " "); |
| 1280 | } |
| 1281 | } |
| 1282 | } |
| 1283 | } |
| 1284 | else |
| 1285 | argPtr = (char *) NULL; |
| 1286 | } |
| 1287 | } |
| 1288 | |
| 1289 | backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty); |
| 1290 | |
| 1291 | if (argIndicatingFullTrace >= 0 && totArgLen > 0) |
| 1292 | xfree (argPtr); |
| 1293 | |
| 1294 | if (old_chain) |
| 1295 | do_cleanups (old_chain); |
| 1296 | } |
| 1297 | |
| 1298 | static void backtrace_full_command (char *arg, int from_tty); |
| 1299 | static void |
| 1300 | backtrace_full_command (char *arg, int from_tty) |
| 1301 | { |
| 1302 | backtrace_command_1 (arg, 1, from_tty); |
| 1303 | } |
| 1304 | \f |
| 1305 | |
| 1306 | /* Print the local variables of a block B active in FRAME. |
| 1307 | Return 1 if any variables were printed; 0 otherwise. */ |
| 1308 | |
| 1309 | static int |
| 1310 | print_block_frame_locals (struct block *b, struct frame_info *fi, |
| 1311 | int num_tabs, struct ui_file *stream) |
| 1312 | { |
| 1313 | struct dict_iterator iter; |
| 1314 | int j; |
| 1315 | struct symbol *sym; |
| 1316 | int values_printed = 0; |
| 1317 | |
| 1318 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 1319 | { |
| 1320 | switch (SYMBOL_CLASS (sym)) |
| 1321 | { |
| 1322 | case LOC_LOCAL: |
| 1323 | case LOC_REGISTER: |
| 1324 | case LOC_STATIC: |
| 1325 | case LOC_BASEREG: |
| 1326 | case LOC_COMPUTED: |
| 1327 | values_printed = 1; |
| 1328 | for (j = 0; j < num_tabs; j++) |
| 1329 | fputs_filtered ("\t", stream); |
| 1330 | fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| 1331 | fputs_filtered (" = ", stream); |
| 1332 | print_variable_value (sym, fi, stream); |
| 1333 | fprintf_filtered (stream, "\n"); |
| 1334 | break; |
| 1335 | |
| 1336 | default: |
| 1337 | /* Ignore symbols which are not locals. */ |
| 1338 | break; |
| 1339 | } |
| 1340 | } |
| 1341 | return values_printed; |
| 1342 | } |
| 1343 | |
| 1344 | /* Same, but print labels. */ |
| 1345 | |
| 1346 | static int |
| 1347 | print_block_frame_labels (struct block *b, int *have_default, |
| 1348 | struct ui_file *stream) |
| 1349 | { |
| 1350 | struct dict_iterator iter; |
| 1351 | struct symbol *sym; |
| 1352 | int values_printed = 0; |
| 1353 | |
| 1354 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 1355 | { |
| 1356 | if (DEPRECATED_STREQ (DEPRECATED_SYMBOL_NAME (sym), "default")) |
| 1357 | { |
| 1358 | if (*have_default) |
| 1359 | continue; |
| 1360 | *have_default = 1; |
| 1361 | } |
| 1362 | if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| 1363 | { |
| 1364 | struct symtab_and_line sal; |
| 1365 | sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| 1366 | values_printed = 1; |
| 1367 | fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| 1368 | if (addressprint) |
| 1369 | { |
| 1370 | fprintf_filtered (stream, " "); |
| 1371 | print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, stream); |
| 1372 | } |
| 1373 | fprintf_filtered (stream, " in file %s, line %d\n", |
| 1374 | sal.symtab->filename, sal.line); |
| 1375 | } |
| 1376 | } |
| 1377 | return values_printed; |
| 1378 | } |
| 1379 | |
| 1380 | /* Print on STREAM all the local variables in frame FRAME, |
| 1381 | including all the blocks active in that frame |
| 1382 | at its current pc. |
| 1383 | |
| 1384 | Returns 1 if the job was done, |
| 1385 | or 0 if nothing was printed because we have no info |
| 1386 | on the function running in FRAME. */ |
| 1387 | |
| 1388 | static void |
| 1389 | print_frame_local_vars (struct frame_info *fi, int num_tabs, |
| 1390 | struct ui_file *stream) |
| 1391 | { |
| 1392 | struct block *block = get_frame_block (fi, 0); |
| 1393 | int values_printed = 0; |
| 1394 | |
| 1395 | if (block == 0) |
| 1396 | { |
| 1397 | fprintf_filtered (stream, "No symbol table info available.\n"); |
| 1398 | return; |
| 1399 | } |
| 1400 | |
| 1401 | while (block != 0) |
| 1402 | { |
| 1403 | if (print_block_frame_locals (block, fi, num_tabs, stream)) |
| 1404 | values_printed = 1; |
| 1405 | /* After handling the function's top-level block, stop. |
| 1406 | Don't continue to its superblock, the block of |
| 1407 | per-file symbols. */ |
| 1408 | if (BLOCK_FUNCTION (block)) |
| 1409 | break; |
| 1410 | block = BLOCK_SUPERBLOCK (block); |
| 1411 | } |
| 1412 | |
| 1413 | if (!values_printed) |
| 1414 | { |
| 1415 | fprintf_filtered (stream, "No locals.\n"); |
| 1416 | } |
| 1417 | } |
| 1418 | |
| 1419 | /* Same, but print labels. */ |
| 1420 | |
| 1421 | static void |
| 1422 | print_frame_label_vars (struct frame_info *fi, int this_level_only, |
| 1423 | struct ui_file *stream) |
| 1424 | { |
| 1425 | struct blockvector *bl; |
| 1426 | struct block *block = get_frame_block (fi, 0); |
| 1427 | int values_printed = 0; |
| 1428 | int index, have_default = 0; |
| 1429 | char *blocks_printed; |
| 1430 | CORE_ADDR pc = get_frame_pc (fi); |
| 1431 | |
| 1432 | if (block == 0) |
| 1433 | { |
| 1434 | fprintf_filtered (stream, "No symbol table info available.\n"); |
| 1435 | return; |
| 1436 | } |
| 1437 | |
| 1438 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); |
| 1439 | blocks_printed = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 1440 | memset (blocks_printed, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 1441 | |
| 1442 | while (block != 0) |
| 1443 | { |
| 1444 | CORE_ADDR end = BLOCK_END (block) - 4; |
| 1445 | int last_index; |
| 1446 | |
| 1447 | if (bl != blockvector_for_pc (end, &index)) |
| 1448 | error ("blockvector blotch"); |
| 1449 | if (BLOCKVECTOR_BLOCK (bl, index) != block) |
| 1450 | error ("blockvector botch"); |
| 1451 | last_index = BLOCKVECTOR_NBLOCKS (bl); |
| 1452 | index += 1; |
| 1453 | |
| 1454 | /* Don't print out blocks that have gone by. */ |
| 1455 | while (index < last_index |
| 1456 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) |
| 1457 | index++; |
| 1458 | |
| 1459 | while (index < last_index |
| 1460 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) |
| 1461 | { |
| 1462 | if (blocks_printed[index] == 0) |
| 1463 | { |
| 1464 | if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl, index), &have_default, stream)) |
| 1465 | values_printed = 1; |
| 1466 | blocks_printed[index] = 1; |
| 1467 | } |
| 1468 | index++; |
| 1469 | } |
| 1470 | if (have_default) |
| 1471 | return; |
| 1472 | if (values_printed && this_level_only) |
| 1473 | return; |
| 1474 | |
| 1475 | /* After handling the function's top-level block, stop. |
| 1476 | Don't continue to its superblock, the block of |
| 1477 | per-file symbols. */ |
| 1478 | if (BLOCK_FUNCTION (block)) |
| 1479 | break; |
| 1480 | block = BLOCK_SUPERBLOCK (block); |
| 1481 | } |
| 1482 | |
| 1483 | if (!values_printed && !this_level_only) |
| 1484 | { |
| 1485 | fprintf_filtered (stream, "No catches.\n"); |
| 1486 | } |
| 1487 | } |
| 1488 | |
| 1489 | void |
| 1490 | locals_info (char *args, int from_tty) |
| 1491 | { |
| 1492 | if (!deprecated_selected_frame) |
| 1493 | error ("No frame selected."); |
| 1494 | print_frame_local_vars (deprecated_selected_frame, 0, gdb_stdout); |
| 1495 | } |
| 1496 | |
| 1497 | static void |
| 1498 | catch_info (char *ignore, int from_tty) |
| 1499 | { |
| 1500 | struct symtab_and_line *sal; |
| 1501 | |
| 1502 | /* Check for target support for exception handling */ |
| 1503 | sal = target_enable_exception_callback (EX_EVENT_CATCH, 1); |
| 1504 | if (sal) |
| 1505 | { |
| 1506 | /* Currently not handling this */ |
| 1507 | /* Ideally, here we should interact with the C++ runtime |
| 1508 | system to find the list of active handlers, etc. */ |
| 1509 | fprintf_filtered (gdb_stdout, "Info catch not supported with this target/compiler combination.\n"); |
| 1510 | #if 0 |
| 1511 | if (!deprecated_selected_frame) |
| 1512 | error ("No frame selected."); |
| 1513 | #endif |
| 1514 | } |
| 1515 | else |
| 1516 | { |
| 1517 | /* Assume g++ compiled code -- old v 4.16 behaviour */ |
| 1518 | if (!deprecated_selected_frame) |
| 1519 | error ("No frame selected."); |
| 1520 | |
| 1521 | print_frame_label_vars (deprecated_selected_frame, 0, gdb_stdout); |
| 1522 | } |
| 1523 | } |
| 1524 | |
| 1525 | static void |
| 1526 | print_frame_arg_vars (struct frame_info *fi, |
| 1527 | struct ui_file *stream) |
| 1528 | { |
| 1529 | struct symbol *func = get_frame_function (fi); |
| 1530 | struct block *b; |
| 1531 | struct dict_iterator iter; |
| 1532 | struct symbol *sym, *sym2; |
| 1533 | int values_printed = 0; |
| 1534 | |
| 1535 | if (func == 0) |
| 1536 | { |
| 1537 | fprintf_filtered (stream, "No symbol table info available.\n"); |
| 1538 | return; |
| 1539 | } |
| 1540 | |
| 1541 | b = SYMBOL_BLOCK_VALUE (func); |
| 1542 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 1543 | { |
| 1544 | switch (SYMBOL_CLASS (sym)) |
| 1545 | { |
| 1546 | case LOC_ARG: |
| 1547 | case LOC_LOCAL_ARG: |
| 1548 | case LOC_REF_ARG: |
| 1549 | case LOC_REGPARM: |
| 1550 | case LOC_REGPARM_ADDR: |
| 1551 | case LOC_BASEREG_ARG: |
| 1552 | case LOC_COMPUTED_ARG: |
| 1553 | values_printed = 1; |
| 1554 | fputs_filtered (SYMBOL_PRINT_NAME (sym), stream); |
| 1555 | fputs_filtered (" = ", stream); |
| 1556 | |
| 1557 | /* We have to look up the symbol because arguments can have |
| 1558 | two entries (one a parameter, one a local) and the one we |
| 1559 | want is the local, which lookup_symbol will find for us. |
| 1560 | This includes gcc1 (not gcc2) on the sparc when passing a |
| 1561 | small structure and gcc2 when the argument type is float |
| 1562 | and it is passed as a double and converted to float by |
| 1563 | the prologue (in the latter case the type of the LOC_ARG |
| 1564 | symbol is double and the type of the LOC_LOCAL symbol is |
| 1565 | float). There are also LOC_ARG/LOC_REGISTER pairs which |
| 1566 | are not combined in symbol-reading. */ |
| 1567 | |
| 1568 | sym2 = lookup_symbol (DEPRECATED_SYMBOL_NAME (sym), |
| 1569 | b, VAR_DOMAIN, (int *) NULL, (struct symtab **) NULL); |
| 1570 | print_variable_value (sym2, fi, stream); |
| 1571 | fprintf_filtered (stream, "\n"); |
| 1572 | break; |
| 1573 | |
| 1574 | default: |
| 1575 | /* Don't worry about things which aren't arguments. */ |
| 1576 | break; |
| 1577 | } |
| 1578 | } |
| 1579 | if (!values_printed) |
| 1580 | { |
| 1581 | fprintf_filtered (stream, "No arguments.\n"); |
| 1582 | } |
| 1583 | } |
| 1584 | |
| 1585 | void |
| 1586 | args_info (char *ignore, int from_tty) |
| 1587 | { |
| 1588 | if (!deprecated_selected_frame) |
| 1589 | error ("No frame selected."); |
| 1590 | print_frame_arg_vars (deprecated_selected_frame, gdb_stdout); |
| 1591 | } |
| 1592 | |
| 1593 | |
| 1594 | static void |
| 1595 | args_plus_locals_info (char *ignore, int from_tty) |
| 1596 | { |
| 1597 | args_info (ignore, from_tty); |
| 1598 | locals_info (ignore, from_tty); |
| 1599 | } |
| 1600 | \f |
| 1601 | |
| 1602 | /* Select frame FI. Also print the stack frame and show the source if |
| 1603 | this is the tui version. */ |
| 1604 | static void |
| 1605 | select_and_print_frame (struct frame_info *fi) |
| 1606 | { |
| 1607 | select_frame (fi); |
| 1608 | if (fi) |
| 1609 | { |
| 1610 | print_stack_frame (fi, frame_relative_level (fi), 1); |
| 1611 | } |
| 1612 | } |
| 1613 | \f |
| 1614 | /* Return the symbol-block in which the selected frame is executing. |
| 1615 | Can return zero under various legitimate circumstances. |
| 1616 | |
| 1617 | If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant |
| 1618 | code address within the block returned. We use this to decide |
| 1619 | which macros are in scope. */ |
| 1620 | |
| 1621 | struct block * |
| 1622 | get_selected_block (CORE_ADDR *addr_in_block) |
| 1623 | { |
| 1624 | if (!target_has_stack) |
| 1625 | return 0; |
| 1626 | |
| 1627 | /* NOTE: cagney/2002-11-28: Why go to all this effort to not create |
| 1628 | a selected/current frame? Perhaphs this function is called, |
| 1629 | indirectly, by WFI in "infrun.c" where avoiding the creation of |
| 1630 | an inner most frame is very important (it slows down single |
| 1631 | step). I suspect, though that this was true in the deep dark |
| 1632 | past but is no longer the case. A mindless look at all the |
| 1633 | callers tends to support this theory. I think we should be able |
| 1634 | to assume that there is always a selcted frame. */ |
| 1635 | /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel |
| 1636 | lucky? */ |
| 1637 | if (!deprecated_selected_frame) |
| 1638 | { |
| 1639 | CORE_ADDR pc = read_pc (); |
| 1640 | if (addr_in_block != NULL) |
| 1641 | *addr_in_block = pc; |
| 1642 | return block_for_pc (pc); |
| 1643 | } |
| 1644 | return get_frame_block (deprecated_selected_frame, addr_in_block); |
| 1645 | } |
| 1646 | |
| 1647 | /* Find a frame a certain number of levels away from FRAME. |
| 1648 | LEVEL_OFFSET_PTR points to an int containing the number of levels. |
| 1649 | Positive means go to earlier frames (up); negative, the reverse. |
| 1650 | The int that contains the number of levels is counted toward |
| 1651 | zero as the frames for those levels are found. |
| 1652 | If the top or bottom frame is reached, that frame is returned, |
| 1653 | but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates |
| 1654 | how much farther the original request asked to go. */ |
| 1655 | |
| 1656 | struct frame_info * |
| 1657 | find_relative_frame (struct frame_info *frame, |
| 1658 | int *level_offset_ptr) |
| 1659 | { |
| 1660 | struct frame_info *prev; |
| 1661 | struct frame_info *frame1; |
| 1662 | |
| 1663 | /* Going up is simple: just do get_prev_frame enough times |
| 1664 | or until initial frame is reached. */ |
| 1665 | while (*level_offset_ptr > 0) |
| 1666 | { |
| 1667 | prev = get_prev_frame (frame); |
| 1668 | if (prev == 0) |
| 1669 | break; |
| 1670 | (*level_offset_ptr)--; |
| 1671 | frame = prev; |
| 1672 | } |
| 1673 | /* Going down is just as simple. */ |
| 1674 | if (*level_offset_ptr < 0) |
| 1675 | { |
| 1676 | while (*level_offset_ptr < 0) |
| 1677 | { |
| 1678 | frame1 = get_next_frame (frame); |
| 1679 | if (!frame1) |
| 1680 | break; |
| 1681 | frame = frame1; |
| 1682 | (*level_offset_ptr)++; |
| 1683 | } |
| 1684 | } |
| 1685 | return frame; |
| 1686 | } |
| 1687 | |
| 1688 | /* The "select_frame" command. With no arg, NOP. |
| 1689 | With arg LEVEL_EXP, select the frame at level LEVEL if it is a |
| 1690 | valid level. Otherwise, treat level_exp as an address expression |
| 1691 | and select it. See parse_frame_specification for more info on proper |
| 1692 | frame expressions. */ |
| 1693 | |
| 1694 | void |
| 1695 | select_frame_command (char *level_exp, int from_tty) |
| 1696 | { |
| 1697 | struct frame_info *frame; |
| 1698 | int level = frame_relative_level (deprecated_selected_frame); |
| 1699 | |
| 1700 | if (!target_has_stack) |
| 1701 | error ("No stack."); |
| 1702 | |
| 1703 | frame = parse_frame_specification (level_exp); |
| 1704 | |
| 1705 | select_frame (frame); |
| 1706 | if (level != frame_relative_level (deprecated_selected_frame)) |
| 1707 | selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame)); |
| 1708 | } |
| 1709 | |
| 1710 | /* The "frame" command. With no arg, print selected frame briefly. |
| 1711 | With arg, behaves like select_frame and then prints the selected |
| 1712 | frame. */ |
| 1713 | |
| 1714 | void |
| 1715 | frame_command (char *level_exp, int from_tty) |
| 1716 | { |
| 1717 | select_frame_command (level_exp, from_tty); |
| 1718 | print_stack_frame (deprecated_selected_frame, |
| 1719 | frame_relative_level (deprecated_selected_frame), 1); |
| 1720 | } |
| 1721 | |
| 1722 | /* The XDB Compatibility command to print the current frame. */ |
| 1723 | |
| 1724 | static void |
| 1725 | current_frame_command (char *level_exp, int from_tty) |
| 1726 | { |
| 1727 | if (target_has_stack == 0 || deprecated_selected_frame == 0) |
| 1728 | error ("No stack."); |
| 1729 | print_stack_frame (deprecated_selected_frame, |
| 1730 | frame_relative_level (deprecated_selected_frame), 1); |
| 1731 | } |
| 1732 | |
| 1733 | /* Select the frame up one or COUNT stack levels |
| 1734 | from the previously selected frame, and print it briefly. */ |
| 1735 | |
| 1736 | static void |
| 1737 | up_silently_base (char *count_exp) |
| 1738 | { |
| 1739 | struct frame_info *fi; |
| 1740 | int count = 1, count1; |
| 1741 | if (count_exp) |
| 1742 | count = parse_and_eval_long (count_exp); |
| 1743 | count1 = count; |
| 1744 | |
| 1745 | if (target_has_stack == 0 || deprecated_selected_frame == 0) |
| 1746 | error ("No stack."); |
| 1747 | |
| 1748 | fi = find_relative_frame (deprecated_selected_frame, &count1); |
| 1749 | if (count1 != 0 && count_exp == 0) |
| 1750 | error ("Initial frame selected; you cannot go up."); |
| 1751 | select_frame (fi); |
| 1752 | selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame)); |
| 1753 | } |
| 1754 | |
| 1755 | static void |
| 1756 | up_silently_command (char *count_exp, int from_tty) |
| 1757 | { |
| 1758 | up_silently_base (count_exp); |
| 1759 | } |
| 1760 | |
| 1761 | static void |
| 1762 | up_command (char *count_exp, int from_tty) |
| 1763 | { |
| 1764 | up_silently_base (count_exp); |
| 1765 | print_stack_frame (deprecated_selected_frame, |
| 1766 | frame_relative_level (deprecated_selected_frame), 1); |
| 1767 | } |
| 1768 | |
| 1769 | /* Select the frame down one or COUNT stack levels |
| 1770 | from the previously selected frame, and print it briefly. */ |
| 1771 | |
| 1772 | static void |
| 1773 | down_silently_base (char *count_exp) |
| 1774 | { |
| 1775 | struct frame_info *frame; |
| 1776 | int count = -1, count1; |
| 1777 | if (count_exp) |
| 1778 | count = -parse_and_eval_long (count_exp); |
| 1779 | count1 = count; |
| 1780 | |
| 1781 | if (target_has_stack == 0 || deprecated_selected_frame == 0) |
| 1782 | error ("No stack."); |
| 1783 | |
| 1784 | frame = find_relative_frame (deprecated_selected_frame, &count1); |
| 1785 | if (count1 != 0 && count_exp == 0) |
| 1786 | { |
| 1787 | |
| 1788 | /* We only do this if count_exp is not specified. That way "down" |
| 1789 | means to really go down (and let me know if that is |
| 1790 | impossible), but "down 9999" can be used to mean go all the way |
| 1791 | down without getting an error. */ |
| 1792 | |
| 1793 | error ("Bottom (i.e., innermost) frame selected; you cannot go down."); |
| 1794 | } |
| 1795 | |
| 1796 | select_frame (frame); |
| 1797 | selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame)); |
| 1798 | } |
| 1799 | |
| 1800 | static void |
| 1801 | down_silently_command (char *count_exp, int from_tty) |
| 1802 | { |
| 1803 | down_silently_base (count_exp); |
| 1804 | } |
| 1805 | |
| 1806 | static void |
| 1807 | down_command (char *count_exp, int from_tty) |
| 1808 | { |
| 1809 | down_silently_base (count_exp); |
| 1810 | print_stack_frame (deprecated_selected_frame, |
| 1811 | frame_relative_level (deprecated_selected_frame), 1); |
| 1812 | } |
| 1813 | \f |
| 1814 | void |
| 1815 | return_command (char *retval_exp, int from_tty) |
| 1816 | { |
| 1817 | struct symbol *thisfun; |
| 1818 | struct value *return_value = NULL; |
| 1819 | const char *query_prefix = ""; |
| 1820 | |
| 1821 | /* FIXME: cagney/2003-10-20: Perform a minimal existance test on the |
| 1822 | target. If that fails, error out. For the moment don't rely on |
| 1823 | get_selected_frame as it's error message is the the singularly |
| 1824 | obscure "No registers". */ |
| 1825 | if (!target_has_registers) |
| 1826 | error ("No selected frame."); |
| 1827 | thisfun = get_frame_function (get_selected_frame ()); |
| 1828 | |
| 1829 | /* Compute the return value. If the computation triggers an error, |
| 1830 | let it bail. If the return type can't be handled, set |
| 1831 | RETURN_VALUE to NULL, and QUERY_PREFIX to an informational |
| 1832 | message. */ |
| 1833 | if (retval_exp) |
| 1834 | { |
| 1835 | struct type *return_type = NULL; |
| 1836 | |
| 1837 | /* Compute the return value. Should the computation fail, this |
| 1838 | call throws an error. */ |
| 1839 | return_value = parse_and_eval (retval_exp); |
| 1840 | |
| 1841 | /* Cast return value to the return type of the function. Should |
| 1842 | the cast fail, this call throws an error. */ |
| 1843 | if (thisfun != NULL) |
| 1844 | return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun)); |
| 1845 | if (return_type == NULL) |
| 1846 | return_type = builtin_type_int; |
| 1847 | return_value = value_cast (return_type, return_value); |
| 1848 | |
| 1849 | /* Make sure the value is fully evaluated. It may live in the |
| 1850 | stack frame we're about to pop. */ |
| 1851 | if (VALUE_LAZY (return_value)) |
| 1852 | value_fetch_lazy (return_value); |
| 1853 | |
| 1854 | if (TYPE_CODE (return_type) == TYPE_CODE_VOID) |
| 1855 | /* If the return-type is "void", don't try to find the |
| 1856 | return-value's location. However, do still evaluate the |
| 1857 | return expression so that, even when the expression result |
| 1858 | is discarded, side effects such as "return i++" still |
| 1859 | occure. */ |
| 1860 | return_value = NULL; |
| 1861 | /* FIXME: cagney/2004-01-17: If the architecture implements both |
| 1862 | return_value and extract_returned_value_address, should allow |
| 1863 | "return" to work - don't set return_value to NULL. */ |
| 1864 | else if (!gdbarch_return_value_p (current_gdbarch) |
| 1865 | && (TYPE_CODE (return_type) == TYPE_CODE_STRUCT |
| 1866 | || TYPE_CODE (return_type) == TYPE_CODE_UNION)) |
| 1867 | { |
| 1868 | /* NOTE: cagney/2003-10-20: Compatibility hack for legacy |
| 1869 | code. Old architectures don't expect STORE_RETURN_VALUE |
| 1870 | to be called with with a small struct that needs to be |
| 1871 | stored in registers. Don't start doing it now. */ |
| 1872 | query_prefix = "\ |
| 1873 | A structure or union return type is not supported by this architecture.\n\ |
| 1874 | If you continue, the return value that you specified will be ignored.\n"; |
| 1875 | return_value = NULL; |
| 1876 | } |
| 1877 | else if (using_struct_return (return_type, 0)) |
| 1878 | { |
| 1879 | query_prefix = "\ |
| 1880 | The location at which to store the function's return value is unknown.\n\ |
| 1881 | If you continue, the return value that you specified will be ignored.\n"; |
| 1882 | return_value = NULL; |
| 1883 | } |
| 1884 | } |
| 1885 | |
| 1886 | /* Does an interactive user really want to do this? Include |
| 1887 | information, such as how well GDB can handle the return value, in |
| 1888 | the query message. */ |
| 1889 | if (from_tty) |
| 1890 | { |
| 1891 | int confirmed; |
| 1892 | if (thisfun == NULL) |
| 1893 | confirmed = query ("%sMake selected stack frame return now? ", |
| 1894 | query_prefix); |
| 1895 | else |
| 1896 | confirmed = query ("%sMake %s return now? ", query_prefix, |
| 1897 | SYMBOL_PRINT_NAME (thisfun)); |
| 1898 | if (!confirmed) |
| 1899 | error ("Not confirmed"); |
| 1900 | } |
| 1901 | |
| 1902 | /* NOTE: cagney/2003-01-18: Is this silly? Rather than pop each |
| 1903 | frame in turn, should this code just go straight to the relevant |
| 1904 | frame and pop that? */ |
| 1905 | |
| 1906 | /* First discard all frames inner-to the selected frame (making the |
| 1907 | selected frame current). */ |
| 1908 | { |
| 1909 | struct frame_id selected_id = get_frame_id (get_selected_frame ()); |
| 1910 | while (!frame_id_eq (selected_id, get_frame_id (get_current_frame ()))) |
| 1911 | { |
| 1912 | if (frame_id_inner (selected_id, get_frame_id (get_current_frame ()))) |
| 1913 | /* Caught in the safety net, oops! We've gone way past the |
| 1914 | selected frame. */ |
| 1915 | error ("Problem while popping stack frames (corrupt stack?)"); |
| 1916 | frame_pop (get_current_frame ()); |
| 1917 | } |
| 1918 | } |
| 1919 | |
| 1920 | /* Second discard the selected frame (which is now also the current |
| 1921 | frame). */ |
| 1922 | frame_pop (get_current_frame ()); |
| 1923 | |
| 1924 | /* Store RETURN_VAUE in the just-returned register set. */ |
| 1925 | if (return_value != NULL) |
| 1926 | { |
| 1927 | struct type *return_type = VALUE_TYPE (return_value); |
| 1928 | if (!gdbarch_return_value_p (current_gdbarch)) |
| 1929 | { |
| 1930 | STORE_RETURN_VALUE (return_type, current_regcache, |
| 1931 | VALUE_CONTENTS (return_value)); |
| 1932 | } |
| 1933 | /* FIXME: cagney/2004-01-17: If extract_returned_value_address |
| 1934 | is available and the function is using |
| 1935 | RETURN_VALUE_STRUCT_CONVENTION, should use it to find the |
| 1936 | address of the returned value so that it can be assigned. */ |
| 1937 | else |
| 1938 | { |
| 1939 | gdb_assert (gdbarch_return_value (current_gdbarch, return_type, |
| 1940 | NULL, NULL, NULL) |
| 1941 | == RETURN_VALUE_REGISTER_CONVENTION); |
| 1942 | gdbarch_return_value (current_gdbarch, return_type, |
| 1943 | current_regcache, NULL /*read*/, |
| 1944 | VALUE_CONTENTS (return_value) /*write*/); |
| 1945 | } |
| 1946 | } |
| 1947 | |
| 1948 | /* If we are at the end of a call dummy now, pop the dummy frame |
| 1949 | too. */ |
| 1950 | /* NOTE: cagney/2003-01-18: Is this silly? Instead of popping all |
| 1951 | the frames in sequence, should this code just pop the dummy frame |
| 1952 | directly? */ |
| 1953 | #ifdef DEPRECATED_CALL_DUMMY_HAS_COMPLETED |
| 1954 | /* Since all up-to-date architectures return direct to the dummy |
| 1955 | breakpoint address, a dummy frame has, by definition, always |
| 1956 | completed. Hence this method is no longer needed. */ |
| 1957 | if (DEPRECATED_CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (), |
| 1958 | get_frame_base (get_current_frame ()))) |
| 1959 | frame_pop (get_current_frame ()); |
| 1960 | #else |
| 1961 | if (get_frame_type (get_current_frame ()) == DUMMY_FRAME) |
| 1962 | frame_pop (get_current_frame ()); |
| 1963 | #endif |
| 1964 | |
| 1965 | /* If interactive, print the frame that is now current. */ |
| 1966 | if (from_tty) |
| 1967 | frame_command ("0", 1); |
| 1968 | else |
| 1969 | select_frame_command ("0", 0); |
| 1970 | } |
| 1971 | |
| 1972 | /* Sets the scope to input function name, provided that the |
| 1973 | function is within the current stack frame */ |
| 1974 | |
| 1975 | struct function_bounds |
| 1976 | { |
| 1977 | CORE_ADDR low, high; |
| 1978 | }; |
| 1979 | |
| 1980 | static void func_command (char *arg, int from_tty); |
| 1981 | static void |
| 1982 | func_command (char *arg, int from_tty) |
| 1983 | { |
| 1984 | struct frame_info *fp; |
| 1985 | int found = 0; |
| 1986 | struct symtabs_and_lines sals; |
| 1987 | int i; |
| 1988 | int level = 1; |
| 1989 | struct function_bounds *func_bounds = (struct function_bounds *) NULL; |
| 1990 | |
| 1991 | if (arg != (char *) NULL) |
| 1992 | return; |
| 1993 | |
| 1994 | fp = parse_frame_specification ("0"); |
| 1995 | sals = decode_line_spec (arg, 1); |
| 1996 | func_bounds = (struct function_bounds *) xmalloc ( |
| 1997 | sizeof (struct function_bounds) * sals.nelts); |
| 1998 | for (i = 0; (i < sals.nelts && !found); i++) |
| 1999 | { |
| 2000 | if (sals.sals[i].pc == (CORE_ADDR) 0 || |
| 2001 | find_pc_partial_function (sals.sals[i].pc, |
| 2002 | (char **) NULL, |
| 2003 | &func_bounds[i].low, |
| 2004 | &func_bounds[i].high) == 0) |
| 2005 | { |
| 2006 | func_bounds[i].low = |
| 2007 | func_bounds[i].high = (CORE_ADDR) NULL; |
| 2008 | } |
| 2009 | } |
| 2010 | |
| 2011 | do |
| 2012 | { |
| 2013 | for (i = 0; (i < sals.nelts && !found); i++) |
| 2014 | found = (get_frame_pc (fp) >= func_bounds[i].low && |
| 2015 | get_frame_pc (fp) < func_bounds[i].high); |
| 2016 | if (!found) |
| 2017 | { |
| 2018 | level = 1; |
| 2019 | fp = find_relative_frame (fp, &level); |
| 2020 | } |
| 2021 | } |
| 2022 | while (!found && level == 0); |
| 2023 | |
| 2024 | if (func_bounds) |
| 2025 | xfree (func_bounds); |
| 2026 | |
| 2027 | if (!found) |
| 2028 | printf_filtered ("'%s' not within current stack frame.\n", arg); |
| 2029 | else if (fp != deprecated_selected_frame) |
| 2030 | select_and_print_frame (fp); |
| 2031 | } |
| 2032 | |
| 2033 | /* Gets the language of the current frame. */ |
| 2034 | |
| 2035 | enum language |
| 2036 | get_frame_language (void) |
| 2037 | { |
| 2038 | struct symtab *s; |
| 2039 | enum language flang; /* The language of the current frame */ |
| 2040 | |
| 2041 | if (deprecated_selected_frame) |
| 2042 | { |
| 2043 | /* We determine the current frame language by looking up its |
| 2044 | associated symtab. To retrieve this symtab, we use the frame PC. |
| 2045 | However we cannot use the frame pc as is, because it usually points |
| 2046 | to the instruction following the "call", which is sometimes the first |
| 2047 | instruction of another function. So we rely on |
| 2048 | get_frame_address_in_block(), it provides us with a PC which is |
| 2049 | guaranteed to be inside the frame's code block. */ |
| 2050 | s = find_pc_symtab (get_frame_address_in_block (deprecated_selected_frame)); |
| 2051 | if (s) |
| 2052 | flang = s->language; |
| 2053 | else |
| 2054 | flang = language_unknown; |
| 2055 | } |
| 2056 | else |
| 2057 | flang = language_unknown; |
| 2058 | |
| 2059 | return flang; |
| 2060 | } |
| 2061 | \f |
| 2062 | void |
| 2063 | _initialize_stack (void) |
| 2064 | { |
| 2065 | #if 0 |
| 2066 | backtrace_limit = 30; |
| 2067 | #endif |
| 2068 | |
| 2069 | add_com ("return", class_stack, return_command, |
| 2070 | "Make selected stack frame return to its caller.\n\ |
| 2071 | Control remains in the debugger, but when you continue\n\ |
| 2072 | execution will resume in the frame above the one now selected.\n\ |
| 2073 | If an argument is given, it is an expression for the value to return."); |
| 2074 | |
| 2075 | add_com ("up", class_stack, up_command, |
| 2076 | "Select and print stack frame that called this one.\n\ |
| 2077 | An argument says how many frames up to go."); |
| 2078 | add_com ("up-silently", class_support, up_silently_command, |
| 2079 | "Same as the `up' command, but does not print anything.\n\ |
| 2080 | This is useful in command scripts."); |
| 2081 | |
| 2082 | add_com ("down", class_stack, down_command, |
| 2083 | "Select and print stack frame called by this one.\n\ |
| 2084 | An argument says how many frames down to go."); |
| 2085 | add_com_alias ("do", "down", class_stack, 1); |
| 2086 | add_com_alias ("dow", "down", class_stack, 1); |
| 2087 | add_com ("down-silently", class_support, down_silently_command, |
| 2088 | "Same as the `down' command, but does not print anything.\n\ |
| 2089 | This is useful in command scripts."); |
| 2090 | |
| 2091 | add_com ("frame", class_stack, frame_command, |
| 2092 | "Select and print a stack frame.\n\ |
| 2093 | With no argument, print the selected stack frame. (See also \"info frame\").\n\ |
| 2094 | An argument specifies the frame to select.\n\ |
| 2095 | It can be a stack frame number or the address of the frame.\n\ |
| 2096 | With argument, nothing is printed if input is coming from\n\ |
| 2097 | a command file or a user-defined command."); |
| 2098 | |
| 2099 | add_com_alias ("f", "frame", class_stack, 1); |
| 2100 | |
| 2101 | if (xdb_commands) |
| 2102 | { |
| 2103 | add_com ("L", class_stack, current_frame_command, |
| 2104 | "Print the current stack frame.\n"); |
| 2105 | add_com_alias ("V", "frame", class_stack, 1); |
| 2106 | } |
| 2107 | add_com ("select-frame", class_stack, select_frame_command, |
| 2108 | "Select a stack frame without printing anything.\n\ |
| 2109 | An argument specifies the frame to select.\n\ |
| 2110 | It can be a stack frame number or the address of the frame.\n"); |
| 2111 | |
| 2112 | add_com ("backtrace", class_stack, backtrace_command, |
| 2113 | "Print backtrace of all stack frames, or innermost COUNT frames.\n\ |
| 2114 | With a negative argument, print outermost -COUNT frames.\n\ |
| 2115 | Use of the 'full' qualifier also prints the values of the local variables.\n"); |
| 2116 | add_com_alias ("bt", "backtrace", class_stack, 0); |
| 2117 | if (xdb_commands) |
| 2118 | { |
| 2119 | add_com_alias ("t", "backtrace", class_stack, 0); |
| 2120 | add_com ("T", class_stack, backtrace_full_command, |
| 2121 | "Print backtrace of all stack frames, or innermost COUNT frames \n\ |
| 2122 | and the values of the local variables.\n\ |
| 2123 | With a negative argument, print outermost -COUNT frames.\n\ |
| 2124 | Usage: T <count>\n"); |
| 2125 | } |
| 2126 | |
| 2127 | add_com_alias ("where", "backtrace", class_alias, 0); |
| 2128 | add_info ("stack", backtrace_command, |
| 2129 | "Backtrace of the stack, or innermost COUNT frames."); |
| 2130 | add_info_alias ("s", "stack", 1); |
| 2131 | add_info ("frame", frame_info, |
| 2132 | "All about selected stack frame, or frame at ADDR."); |
| 2133 | add_info_alias ("f", "frame", 1); |
| 2134 | add_info ("locals", locals_info, |
| 2135 | "Local variables of current stack frame."); |
| 2136 | add_info ("args", args_info, |
| 2137 | "Argument variables of current stack frame."); |
| 2138 | if (xdb_commands) |
| 2139 | add_com ("l", class_info, args_plus_locals_info, |
| 2140 | "Argument and local variables of current stack frame."); |
| 2141 | |
| 2142 | if (dbx_commands) |
| 2143 | add_com ("func", class_stack, func_command, |
| 2144 | "Select the stack frame that contains <func>.\nUsage: func <name>\n"); |
| 2145 | |
| 2146 | add_info ("catch", catch_info, |
| 2147 | "Exceptions that can be caught in the current stack frame."); |
| 2148 | |
| 2149 | #if 0 |
| 2150 | add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command, |
| 2151 | "Specify maximum number of frames for \"backtrace\" to print by default.", |
| 2152 | &setlist); |
| 2153 | add_info ("backtrace-limit", backtrace_limit_info, |
| 2154 | "The maximum number of frames for \"backtrace\" to print by default."); |
| 2155 | #endif |
| 2156 | } |