| 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 Free Software |
| 5 | 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 "breakpoint.h" |
| 37 | #include "demangle.h" |
| 38 | #include "inferior.h" |
| 39 | #include "annotate.h" |
| 40 | #include "ui-out.h" |
| 41 | |
| 42 | /* Prototypes for exported functions. */ |
| 43 | |
| 44 | void args_info (char *, int); |
| 45 | |
| 46 | void locals_info (char *, int); |
| 47 | |
| 48 | void (*selected_frame_level_changed_hook) (int); |
| 49 | |
| 50 | void _initialize_stack (void); |
| 51 | |
| 52 | /* Prototypes for local functions. */ |
| 53 | |
| 54 | static void return_command (char *, int); |
| 55 | |
| 56 | static void down_command (char *, int); |
| 57 | |
| 58 | static void down_silently_base (char *); |
| 59 | |
| 60 | static void down_silently_command (char *, int); |
| 61 | |
| 62 | static void up_command (char *, int); |
| 63 | |
| 64 | static void up_silently_base (char *); |
| 65 | |
| 66 | static void up_silently_command (char *, int); |
| 67 | |
| 68 | void frame_command (char *, int); |
| 69 | |
| 70 | static void current_frame_command (char *, int); |
| 71 | |
| 72 | static void select_frame_command (char *, int); |
| 73 | |
| 74 | static void print_frame_arg_vars (struct frame_info *, struct ui_file *); |
| 75 | |
| 76 | static void catch_info (char *, int); |
| 77 | |
| 78 | static void args_plus_locals_info (char *, int); |
| 79 | |
| 80 | static void print_frame_label_vars (struct frame_info *, int, |
| 81 | struct ui_file *); |
| 82 | |
| 83 | static void print_frame_local_vars (struct frame_info *, int, |
| 84 | struct ui_file *); |
| 85 | |
| 86 | static int print_block_frame_labels (struct block *, int *, |
| 87 | struct ui_file *); |
| 88 | |
| 89 | static int print_block_frame_locals (struct block *, |
| 90 | struct frame_info *, |
| 91 | int, |
| 92 | struct ui_file *); |
| 93 | |
| 94 | static void print_frame (struct frame_info *fi, |
| 95 | int level, |
| 96 | int source, |
| 97 | int args, |
| 98 | struct symtab_and_line sal); |
| 99 | |
| 100 | static void print_frame_info_base (struct frame_info *, int, int, int); |
| 101 | |
| 102 | static void print_stack_frame_base (struct frame_info *, int, int); |
| 103 | |
| 104 | static void backtrace_command (char *, int); |
| 105 | |
| 106 | struct frame_info *parse_frame_specification (char *); |
| 107 | |
| 108 | static void frame_info (char *, int); |
| 109 | |
| 110 | extern int addressprint; /* Print addresses, or stay symbolic only? */ |
| 111 | extern int lines_to_list; /* # of lines "list" command shows by default */ |
| 112 | |
| 113 | /* The "selected" stack frame is used by default for local and arg access. |
| 114 | May be zero, for no selected frame. */ |
| 115 | |
| 116 | struct frame_info *selected_frame; |
| 117 | |
| 118 | /* Level of the selected frame: |
| 119 | 0 for innermost, 1 for its caller, ... |
| 120 | or -1 for frame specified by address with no defined level. */ |
| 121 | |
| 122 | int selected_frame_level; |
| 123 | |
| 124 | /* Zero means do things normally; we are interacting directly with the |
| 125 | user. One means print the full filename and linenumber when a |
| 126 | frame is printed, and do so in a format emacs18/emacs19.22 can |
| 127 | parse. Two means print similar annotations, but in many more |
| 128 | cases and in a slightly different syntax. */ |
| 129 | |
| 130 | int annotation_level = 0; |
| 131 | \f |
| 132 | |
| 133 | struct print_stack_frame_args |
| 134 | { |
| 135 | struct frame_info *fi; |
| 136 | int level; |
| 137 | int source; |
| 138 | int args; |
| 139 | }; |
| 140 | |
| 141 | static int print_stack_frame_base_stub (char *); |
| 142 | |
| 143 | /* Show and print the frame arguments. |
| 144 | Pass the args the way catch_errors wants them. */ |
| 145 | static int show_and_print_stack_frame_stub (void *args); |
| 146 | static int |
| 147 | show_and_print_stack_frame_stub (void *args) |
| 148 | { |
| 149 | struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| 150 | |
| 151 | print_frame_info (p->fi, p->level, p->source, p->args); |
| 152 | |
| 153 | return 0; |
| 154 | } |
| 155 | |
| 156 | /* Show or print the frame arguments. |
| 157 | Pass the args the way catch_errors wants them. */ |
| 158 | static int print_stack_frame_stub (void *args); |
| 159 | static int |
| 160 | print_stack_frame_stub (void *args) |
| 161 | { |
| 162 | struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| 163 | |
| 164 | print_frame_info_base (p->fi, p->level, p->source, p->args); |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | /* Print a stack frame briefly. FRAME_INFI should be the frame info |
| 169 | and LEVEL should be its level in the stack (or -1 for level not |
| 170 | defined). */ |
| 171 | |
| 172 | /* Pass the args the way catch_errors wants them. */ |
| 173 | static int |
| 174 | print_stack_frame_base_stub (char *args) |
| 175 | { |
| 176 | struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| 177 | |
| 178 | print_frame_info_base (p->fi, p->level, p->source, p->args); |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | /* print the frame arguments to the terminal. |
| 183 | Pass the args the way catch_errors wants them. */ |
| 184 | static int print_only_stack_frame_stub (void *); |
| 185 | static int |
| 186 | print_only_stack_frame_stub (void *args) |
| 187 | { |
| 188 | struct print_stack_frame_args *p = (struct print_stack_frame_args *) args; |
| 189 | |
| 190 | print_frame_info_base (p->fi, p->level, p->source, p->args); |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | /* Print a stack frame briefly. FRAME_INFI should be the frame info |
| 195 | and LEVEL should be its level in the stack (or -1 for level not defined). |
| 196 | This prints the level, the function executing, the arguments, |
| 197 | and the file name and line number. |
| 198 | If the pc is not at the beginning of the source line, |
| 199 | the actual pc is printed at the beginning. |
| 200 | |
| 201 | If SOURCE is 1, print the source line as well. |
| 202 | If SOURCE is -1, print ONLY the source line. */ |
| 203 | |
| 204 | static void |
| 205 | print_stack_frame_base (struct frame_info *fi, int level, int source) |
| 206 | { |
| 207 | struct print_stack_frame_args args; |
| 208 | |
| 209 | args.fi = fi; |
| 210 | args.level = level; |
| 211 | args.source = source; |
| 212 | args.args = 1; |
| 213 | |
| 214 | catch_errors (print_stack_frame_stub, &args, "", RETURN_MASK_ALL); |
| 215 | } |
| 216 | |
| 217 | /* Show and print a stack frame briefly. FRAME_INFI should be the frame info |
| 218 | and LEVEL should be its level in the stack (or -1 for level not defined). |
| 219 | This prints the level, the function executing, the arguments, |
| 220 | and the file name and line number. |
| 221 | If the pc is not at the beginning of the source line, |
| 222 | the actual pc is printed at the beginning. |
| 223 | |
| 224 | If SOURCE is 1, print the source line as well. |
| 225 | If SOURCE is -1, print ONLY the source line. */ |
| 226 | |
| 227 | void |
| 228 | show_and_print_stack_frame (struct frame_info *fi, int level, int source) |
| 229 | { |
| 230 | struct print_stack_frame_args args; |
| 231 | |
| 232 | args.fi = fi; |
| 233 | args.level = level; |
| 234 | args.source = source; |
| 235 | args.args = 1; |
| 236 | |
| 237 | catch_errors (show_and_print_stack_frame_stub, &args, "", RETURN_MASK_ALL); |
| 238 | } |
| 239 | |
| 240 | |
| 241 | /* Show or print a stack frame briefly. FRAME_INFI should be the frame info |
| 242 | and LEVEL should be its level in the stack (or -1 for level not defined). |
| 243 | This prints the level, the function executing, the arguments, |
| 244 | and the file name and line number. |
| 245 | If the pc is not at the beginning of the source line, |
| 246 | the actual pc is printed at the beginning. |
| 247 | |
| 248 | If SOURCE is 1, print the source line as well. |
| 249 | If SOURCE is -1, print ONLY the source line. */ |
| 250 | |
| 251 | void |
| 252 | print_stack_frame (struct frame_info *fi, int level, int source) |
| 253 | { |
| 254 | struct print_stack_frame_args args; |
| 255 | |
| 256 | args.fi = fi; |
| 257 | args.level = level; |
| 258 | args.source = source; |
| 259 | args.args = 1; |
| 260 | |
| 261 | catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL); |
| 262 | } |
| 263 | |
| 264 | /* Print a stack frame briefly. FRAME_INFI should be the frame info |
| 265 | and LEVEL should be its level in the stack (or -1 for level not defined). |
| 266 | This prints the level, the function executing, the arguments, |
| 267 | and the file name and line number. |
| 268 | If the pc is not at the beginning of the source line, |
| 269 | the actual pc is printed at the beginning. |
| 270 | |
| 271 | If SOURCE is 1, print the source line as well. |
| 272 | If SOURCE is -1, print ONLY the source line. */ |
| 273 | |
| 274 | void |
| 275 | print_only_stack_frame (struct frame_info *fi, int level, int source) |
| 276 | { |
| 277 | struct print_stack_frame_args args; |
| 278 | |
| 279 | args.fi = fi; |
| 280 | args.level = level; |
| 281 | args.source = source; |
| 282 | args.args = 1; |
| 283 | |
| 284 | catch_errors (print_only_stack_frame_stub, &args, "", RETURN_MASK_ALL); |
| 285 | } |
| 286 | |
| 287 | struct print_args_args |
| 288 | { |
| 289 | struct symbol *func; |
| 290 | struct frame_info *fi; |
| 291 | struct ui_file *stream; |
| 292 | }; |
| 293 | |
| 294 | static int print_args_stub (PTR); |
| 295 | |
| 296 | /* Pass the args the way catch_errors wants them. */ |
| 297 | |
| 298 | static int |
| 299 | print_args_stub (PTR args) |
| 300 | { |
| 301 | int numargs; |
| 302 | struct print_args_args *p = (struct print_args_args *) args; |
| 303 | |
| 304 | numargs = FRAME_NUM_ARGS (p->fi); |
| 305 | print_frame_args (p->func, p->fi, numargs, p->stream); |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | /* Print information about a frame for frame "fi" at level "level". |
| 310 | Used in "where" output, also used to emit breakpoint or step |
| 311 | messages. |
| 312 | LEVEL is the level of the frame, or -1 if it is the |
| 313 | innermost frame but we don't want to print the level. |
| 314 | The meaning of the SOURCE argument is: |
| 315 | SRC_LINE: Print only source line |
| 316 | LOCATION: Print only location |
| 317 | LOC_AND_SRC: Print location and source line. */ |
| 318 | |
| 319 | static void |
| 320 | print_frame_info_base (struct frame_info *fi, int level, int source, int args) |
| 321 | { |
| 322 | struct symtab_and_line sal; |
| 323 | int source_print; |
| 324 | int location_print; |
| 325 | |
| 326 | #if 0 |
| 327 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 328 | CORE_ADDR sp; |
| 329 | |
| 330 | /* On the 68k, this spends too much time in m68k_find_saved_regs. */ |
| 331 | |
| 332 | /* Get the value of SP_REGNUM relative to the frame. */ |
| 333 | get_saved_register (buf, (int *) NULL, (CORE_ADDR *) NULL, |
| 334 | FRAME_INFO_ID (fi), SP_REGNUM, (enum lval_type *) NULL); |
| 335 | sp = extract_address (buf, REGISTER_RAW_SIZE (SP_REGNUM)); |
| 336 | |
| 337 | /* This is not a perfect test, because if a function alloca's some |
| 338 | memory, puts some code there, and then jumps into it, then the test |
| 339 | will succeed even though there is no call dummy. Probably best is |
| 340 | to check for a bp_call_dummy breakpoint. */ |
| 341 | if (PC_IN_CALL_DUMMY (fi->pc, sp, fi->frame)) |
| 342 | #else |
| 343 | if (frame_in_dummy (fi)) |
| 344 | #endif |
| 345 | { |
| 346 | annotate_frame_begin (level == -1 ? 0 : level, fi->pc); |
| 347 | |
| 348 | /* Do this regardless of SOURCE because we don't have any source |
| 349 | to list for this frame. */ |
| 350 | if (level >= 0) |
| 351 | printf_filtered ("#%-2d ", level); |
| 352 | annotate_function_call (); |
| 353 | printf_filtered ("<function called from gdb>\n"); |
| 354 | annotate_frame_end (); |
| 355 | return; |
| 356 | } |
| 357 | if (fi->signal_handler_caller) |
| 358 | { |
| 359 | annotate_frame_begin (level == -1 ? 0 : level, fi->pc); |
| 360 | |
| 361 | /* Do this regardless of SOURCE because we don't have any source |
| 362 | to list for this frame. */ |
| 363 | if (level >= 0) |
| 364 | printf_filtered ("#%-2d ", level); |
| 365 | annotate_signal_handler_caller (); |
| 366 | printf_filtered ("<signal handler called>\n"); |
| 367 | annotate_frame_end (); |
| 368 | return; |
| 369 | } |
| 370 | |
| 371 | /* If fi is not the innermost frame, that normally means that fi->pc |
| 372 | points to *after* the call instruction, and we want to get the line |
| 373 | containing the call, never the next line. But if the next frame is |
| 374 | a signal_handler_caller or a dummy frame, then the next frame was |
| 375 | not entered as the result of a call, and we want to get the line |
| 376 | containing fi->pc. */ |
| 377 | sal = |
| 378 | find_pc_line (fi->pc, |
| 379 | fi->next != NULL |
| 380 | && !fi->next->signal_handler_caller |
| 381 | && !frame_in_dummy (fi->next)); |
| 382 | |
| 383 | location_print = (source == LOCATION |
| 384 | || source == LOC_AND_ADDRESS |
| 385 | || source == SRC_AND_LOC); |
| 386 | |
| 387 | if (location_print || !sal.symtab) |
| 388 | print_frame (fi, level, source, args, sal); |
| 389 | |
| 390 | source_print = (source == SRC_LINE || source == SRC_AND_LOC); |
| 391 | |
| 392 | if (source_print && sal.symtab) |
| 393 | { |
| 394 | int done = 0; |
| 395 | int mid_statement = (source == SRC_LINE) && (fi->pc != sal.pc); |
| 396 | |
| 397 | if (annotation_level) |
| 398 | done = identify_source_line (sal.symtab, sal.line, mid_statement, |
| 399 | fi->pc); |
| 400 | if (!done) |
| 401 | { |
| 402 | if (print_frame_info_listing_hook) |
| 403 | print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0); |
| 404 | else |
| 405 | { |
| 406 | /* We used to do this earlier, but that is clearly |
| 407 | wrong. This function is used by many different |
| 408 | parts of gdb, including normal_stop in infrun.c, |
| 409 | which uses this to print out the current PC |
| 410 | when we stepi/nexti into the middle of a source |
| 411 | line. Only the command line really wants this |
| 412 | behavior. Other UIs probably would like the |
| 413 | ability to decide for themselves if it is desired. */ |
| 414 | if (addressprint && mid_statement) |
| 415 | { |
| 416 | ui_out_field_core_addr (uiout, "addr", fi->pc); |
| 417 | ui_out_text (uiout, "\t"); |
| 418 | } |
| 419 | |
| 420 | print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); |
| 421 | } |
| 422 | } |
| 423 | current_source_line = max (sal.line - lines_to_list / 2, 1); |
| 424 | } |
| 425 | |
| 426 | if (source != 0) |
| 427 | set_default_breakpoint (1, fi->pc, sal.symtab, sal.line); |
| 428 | |
| 429 | annotate_frame_end (); |
| 430 | |
| 431 | gdb_flush (gdb_stdout); |
| 432 | } |
| 433 | |
| 434 | static void |
| 435 | print_frame (struct frame_info *fi, |
| 436 | int level, |
| 437 | int source, |
| 438 | int args, |
| 439 | struct symtab_and_line sal) |
| 440 | { |
| 441 | struct symbol *func; |
| 442 | register char *funname = 0; |
| 443 | enum language funlang = language_unknown; |
| 444 | struct ui_stream *stb; |
| 445 | struct cleanup *old_chain; |
| 446 | struct cleanup *list_chain; |
| 447 | |
| 448 | stb = ui_out_stream_new (uiout); |
| 449 | old_chain = make_cleanup_ui_out_stream_delete (stb); |
| 450 | |
| 451 | func = find_pc_function (fi->pc); |
| 452 | if (func) |
| 453 | { |
| 454 | /* In certain pathological cases, the symtabs give the wrong |
| 455 | function (when we are in the first function in a file which |
| 456 | is compiled without debugging symbols, the previous function |
| 457 | is compiled with debugging symbols, and the "foo.o" symbol |
| 458 | that is supposed to tell us where the file with debugging symbols |
| 459 | ends has been truncated by ar because it is longer than 15 |
| 460 | characters). This also occurs if the user uses asm() to create |
| 461 | a function but not stabs for it (in a file compiled -g). |
| 462 | |
| 463 | So look in the minimal symbol tables as well, and if it comes |
| 464 | up with a larger address for the function use that instead. |
| 465 | I don't think this can ever cause any problems; there shouldn't |
| 466 | be any minimal symbols in the middle of a function; if this is |
| 467 | ever changed many parts of GDB will need to be changed (and we'll |
| 468 | create a find_pc_minimal_function or some such). */ |
| 469 | |
| 470 | struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc); |
| 471 | if (msymbol != NULL |
| 472 | && (SYMBOL_VALUE_ADDRESS (msymbol) |
| 473 | > BLOCK_START (SYMBOL_BLOCK_VALUE (func)))) |
| 474 | { |
| 475 | #if 0 |
| 476 | /* There is no particular reason to think the line number |
| 477 | information is wrong. Someone might have just put in |
| 478 | a label with asm() but left the line numbers alone. */ |
| 479 | /* In this case we have no way of knowing the source file |
| 480 | and line number, so don't print them. */ |
| 481 | sal.symtab = 0; |
| 482 | #endif |
| 483 | /* We also don't know anything about the function besides |
| 484 | its address and name. */ |
| 485 | func = 0; |
| 486 | funname = SYMBOL_NAME (msymbol); |
| 487 | funlang = SYMBOL_LANGUAGE (msymbol); |
| 488 | } |
| 489 | else |
| 490 | { |
| 491 | /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the |
| 492 | demangled name that we already have stored in the symbol |
| 493 | table, but we stored a version with DMGL_PARAMS turned |
| 494 | on, and here we don't want to display parameters. So call |
| 495 | the demangler again, with DMGL_ANSI only. (Yes, I know |
| 496 | that printf_symbol_filtered() will again try to demangle |
| 497 | the name on the fly, but the issue is that if |
| 498 | cplus_demangle() fails here, it'll fail there too. So we |
| 499 | want to catch the failure ("demangled==NULL" case below) |
| 500 | here, while we still have our hands on the function |
| 501 | symbol.) */ |
| 502 | char *demangled; |
| 503 | funname = SYMBOL_NAME (func); |
| 504 | funlang = SYMBOL_LANGUAGE (func); |
| 505 | if (funlang == language_cplus) |
| 506 | { |
| 507 | demangled = cplus_demangle (funname, DMGL_ANSI); |
| 508 | if (demangled == NULL) |
| 509 | /* If the demangler fails, try the demangled name from |
| 510 | the symbol table. This'll have parameters, but |
| 511 | that's preferable to diplaying a mangled name. */ |
| 512 | funname = SYMBOL_SOURCE_NAME (func); |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | else |
| 517 | { |
| 518 | struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc); |
| 519 | if (msymbol != NULL) |
| 520 | { |
| 521 | funname = SYMBOL_NAME (msymbol); |
| 522 | funlang = SYMBOL_LANGUAGE (msymbol); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | annotate_frame_begin (level == -1 ? 0 : level, fi->pc); |
| 527 | |
| 528 | list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame"); |
| 529 | |
| 530 | if (level >= 0) |
| 531 | { |
| 532 | ui_out_text (uiout, "#"); |
| 533 | ui_out_field_fmt (uiout, "level", "%-2d", level); |
| 534 | ui_out_spaces (uiout, 1); |
| 535 | } |
| 536 | if (addressprint) |
| 537 | if (fi->pc != sal.pc || !sal.symtab || source == LOC_AND_ADDRESS) |
| 538 | { |
| 539 | annotate_frame_address (); |
| 540 | ui_out_field_core_addr (uiout, "addr", fi->pc); |
| 541 | annotate_frame_address_end (); |
| 542 | ui_out_text (uiout, " in "); |
| 543 | } |
| 544 | annotate_frame_function_name (); |
| 545 | fprintf_symbol_filtered (stb->stream, funname ? funname : "??", funlang, |
| 546 | DMGL_ANSI); |
| 547 | ui_out_field_stream (uiout, "func", stb); |
| 548 | ui_out_wrap_hint (uiout, " "); |
| 549 | annotate_frame_args (); |
| 550 | |
| 551 | ui_out_text (uiout, " ("); |
| 552 | if (args) |
| 553 | { |
| 554 | struct print_args_args args; |
| 555 | struct cleanup *args_list_chain; |
| 556 | args.fi = fi; |
| 557 | args.func = func; |
| 558 | args.stream = gdb_stdout; |
| 559 | args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args"); |
| 560 | catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL); |
| 561 | /* FIXME: args must be a list. If one argument is a string it will |
| 562 | have " that will not be properly escaped. */ |
| 563 | /* Invoke ui_out_tuple_end. */ |
| 564 | do_cleanups (args_list_chain); |
| 565 | QUIT; |
| 566 | } |
| 567 | ui_out_text (uiout, ")"); |
| 568 | if (sal.symtab && sal.symtab->filename) |
| 569 | { |
| 570 | annotate_frame_source_begin (); |
| 571 | ui_out_wrap_hint (uiout, " "); |
| 572 | ui_out_text (uiout, " at "); |
| 573 | annotate_frame_source_file (); |
| 574 | ui_out_field_string (uiout, "file", sal.symtab->filename); |
| 575 | annotate_frame_source_file_end (); |
| 576 | ui_out_text (uiout, ":"); |
| 577 | annotate_frame_source_line (); |
| 578 | ui_out_field_int (uiout, "line", sal.line); |
| 579 | annotate_frame_source_end (); |
| 580 | } |
| 581 | |
| 582 | #ifdef PC_SOLIB |
| 583 | if (!funname || (!sal.symtab || !sal.symtab->filename)) |
| 584 | { |
| 585 | char *lib = PC_SOLIB (fi->pc); |
| 586 | if (lib) |
| 587 | { |
| 588 | annotate_frame_where (); |
| 589 | ui_out_wrap_hint (uiout, " "); |
| 590 | ui_out_text (uiout, " from "); |
| 591 | ui_out_field_string (uiout, "from", lib); |
| 592 | } |
| 593 | } |
| 594 | #endif /* PC_SOLIB */ |
| 595 | |
| 596 | /* do_cleanups will call ui_out_tuple_end() for us. */ |
| 597 | do_cleanups (list_chain); |
| 598 | ui_out_text (uiout, "\n"); |
| 599 | do_cleanups (old_chain); |
| 600 | } |
| 601 | \f |
| 602 | |
| 603 | /* Show or print the frame info. If this is the tui, it will be shown in |
| 604 | the source display */ |
| 605 | void |
| 606 | print_frame_info (struct frame_info *fi, register int level, int source, |
| 607 | int args) |
| 608 | { |
| 609 | print_frame_info_base (fi, level, source, args); |
| 610 | } |
| 611 | |
| 612 | /* Show the frame info. If this is the tui, it will be shown in |
| 613 | the source display otherwise, nothing is done */ |
| 614 | void |
| 615 | show_stack_frame (struct frame_info *fi) |
| 616 | { |
| 617 | } |
| 618 | \f |
| 619 | |
| 620 | /* Read a frame specification in whatever the appropriate format is. |
| 621 | Call error() if the specification is in any way invalid (i.e. |
| 622 | this function never returns NULL). */ |
| 623 | |
| 624 | struct frame_info * |
| 625 | parse_frame_specification (char *frame_exp) |
| 626 | { |
| 627 | int numargs = 0; |
| 628 | #define MAXARGS 4 |
| 629 | CORE_ADDR args[MAXARGS]; |
| 630 | int level; |
| 631 | |
| 632 | if (frame_exp) |
| 633 | { |
| 634 | char *addr_string, *p; |
| 635 | struct cleanup *tmp_cleanup; |
| 636 | |
| 637 | while (*frame_exp == ' ') |
| 638 | frame_exp++; |
| 639 | |
| 640 | while (*frame_exp) |
| 641 | { |
| 642 | if (numargs > MAXARGS) |
| 643 | error ("Too many args in frame specification"); |
| 644 | /* Parse an argument. */ |
| 645 | for (p = frame_exp; *p && *p != ' '; p++) |
| 646 | ; |
| 647 | addr_string = savestring (frame_exp, p - frame_exp); |
| 648 | |
| 649 | { |
| 650 | struct value *vp; |
| 651 | |
| 652 | tmp_cleanup = make_cleanup (xfree, addr_string); |
| 653 | |
| 654 | /* NOTE: we call parse_and_eval and then both |
| 655 | value_as_long and value_as_address rather than calling |
| 656 | parse_and_eval_long and parse_and_eval_address because |
| 657 | of the issue of potential side effects from evaluating |
| 658 | the expression. */ |
| 659 | vp = parse_and_eval (addr_string); |
| 660 | if (numargs == 0) |
| 661 | level = value_as_long (vp); |
| 662 | |
| 663 | args[numargs++] = value_as_address (vp); |
| 664 | do_cleanups (tmp_cleanup); |
| 665 | } |
| 666 | |
| 667 | /* Skip spaces, move to possible next arg. */ |
| 668 | while (*p == ' ') |
| 669 | p++; |
| 670 | frame_exp = p; |
| 671 | } |
| 672 | } |
| 673 | |
| 674 | switch (numargs) |
| 675 | { |
| 676 | case 0: |
| 677 | if (selected_frame == NULL) |
| 678 | error ("No selected frame."); |
| 679 | return selected_frame; |
| 680 | /* NOTREACHED */ |
| 681 | case 1: |
| 682 | { |
| 683 | struct frame_info *fid = |
| 684 | find_relative_frame (get_current_frame (), &level); |
| 685 | struct frame_info *tfid; |
| 686 | |
| 687 | if (level == 0) |
| 688 | /* find_relative_frame was successful */ |
| 689 | return fid; |
| 690 | |
| 691 | /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications |
| 692 | take at least 2 addresses. It is important to detect this case |
| 693 | here so that "frame 100" does not give a confusing error message |
| 694 | like "frame specification requires two addresses". This of course |
| 695 | does not solve the "frame 100" problem for machines on which |
| 696 | a frame specification can be made with one address. To solve |
| 697 | that, we need a new syntax for a specifying a frame by address. |
| 698 | I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for |
| 699 | two args, etc.), but people might think that is too much typing, |
| 700 | so I guess *0x23,0x45 would be a possible alternative (commas |
| 701 | really should be used instead of spaces to delimit; using spaces |
| 702 | normally works in an expression). */ |
| 703 | #ifdef SETUP_ARBITRARY_FRAME |
| 704 | error ("No frame %d", args[0]); |
| 705 | #endif |
| 706 | |
| 707 | /* If (s)he specifies the frame with an address, he deserves what |
| 708 | (s)he gets. Still, give the highest one that matches. */ |
| 709 | |
| 710 | for (fid = get_current_frame (); |
| 711 | fid && fid->frame != args[0]; |
| 712 | fid = get_prev_frame (fid)) |
| 713 | ; |
| 714 | |
| 715 | if (fid) |
| 716 | while ((tfid = get_prev_frame (fid)) && |
| 717 | (tfid->frame == args[0])) |
| 718 | fid = tfid; |
| 719 | |
| 720 | /* We couldn't identify the frame as an existing frame, but |
| 721 | perhaps we can create one with a single argument. */ |
| 722 | } |
| 723 | |
| 724 | default: |
| 725 | #ifdef SETUP_ARBITRARY_FRAME |
| 726 | return SETUP_ARBITRARY_FRAME (numargs, args); |
| 727 | #else |
| 728 | /* Usual case. Do it here rather than have everyone supply |
| 729 | a SETUP_ARBITRARY_FRAME that does this. */ |
| 730 | if (numargs == 1) |
| 731 | return create_new_frame (args[0], 0); |
| 732 | error ("Too many args in frame specification"); |
| 733 | #endif |
| 734 | /* NOTREACHED */ |
| 735 | } |
| 736 | /* NOTREACHED */ |
| 737 | } |
| 738 | |
| 739 | /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except |
| 740 | that if it is unsure about the answer, it returns 0 |
| 741 | instead of guessing (this happens on the VAX and i960, for example). |
| 742 | |
| 743 | On most machines, we never have to guess about the args address, |
| 744 | so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */ |
| 745 | #if !defined (FRAME_ARGS_ADDRESS_CORRECT) |
| 746 | #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS |
| 747 | #endif |
| 748 | |
| 749 | /* Print verbosely the selected frame or the frame at address ADDR. |
| 750 | This means absolutely all information in the frame is printed. */ |
| 751 | |
| 752 | static void |
| 753 | frame_info (char *addr_exp, int from_tty) |
| 754 | { |
| 755 | struct frame_info *fi; |
| 756 | struct symtab_and_line sal; |
| 757 | struct symbol *func; |
| 758 | struct symtab *s; |
| 759 | struct frame_info *calling_frame_info; |
| 760 | int i, count, numregs; |
| 761 | char *funname = 0; |
| 762 | enum language funlang = language_unknown; |
| 763 | |
| 764 | if (!target_has_stack) |
| 765 | error ("No stack."); |
| 766 | |
| 767 | fi = parse_frame_specification (addr_exp); |
| 768 | if (fi == NULL) |
| 769 | error ("Invalid frame specified."); |
| 770 | |
| 771 | sal = find_pc_line (fi->pc, |
| 772 | fi->next != NULL |
| 773 | && !fi->next->signal_handler_caller |
| 774 | && !frame_in_dummy (fi->next)); |
| 775 | func = get_frame_function (fi); |
| 776 | s = find_pc_symtab (fi->pc); |
| 777 | if (func) |
| 778 | { |
| 779 | /* I'd like to use SYMBOL_SOURCE_NAME() here, to display |
| 780 | * the demangled name that we already have stored in |
| 781 | * the symbol table, but we stored a version with |
| 782 | * DMGL_PARAMS turned on, and here we don't want |
| 783 | * to display parameters. So call the demangler again, |
| 784 | * with DMGL_ANSI only. RT |
| 785 | * (Yes, I know that printf_symbol_filtered() will |
| 786 | * again try to demangle the name on the fly, but |
| 787 | * the issue is that if cplus_demangle() fails here, |
| 788 | * it'll fail there too. So we want to catch the failure |
| 789 | * ("demangled==NULL" case below) here, while we still |
| 790 | * have our hands on the function symbol.) |
| 791 | */ |
| 792 | char *demangled; |
| 793 | funname = SYMBOL_NAME (func); |
| 794 | funlang = SYMBOL_LANGUAGE (func); |
| 795 | if (funlang == language_cplus) |
| 796 | { |
| 797 | demangled = cplus_demangle (funname, DMGL_ANSI); |
| 798 | /* If the demangler fails, try the demangled name |
| 799 | * from the symbol table. This'll have parameters, |
| 800 | * but that's preferable to diplaying a mangled name. |
| 801 | */ |
| 802 | if (demangled == NULL) |
| 803 | funname = SYMBOL_SOURCE_NAME (func); |
| 804 | } |
| 805 | } |
| 806 | else |
| 807 | { |
| 808 | register struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc); |
| 809 | if (msymbol != NULL) |
| 810 | { |
| 811 | funname = SYMBOL_NAME (msymbol); |
| 812 | funlang = SYMBOL_LANGUAGE (msymbol); |
| 813 | } |
| 814 | } |
| 815 | calling_frame_info = get_prev_frame (fi); |
| 816 | |
| 817 | if (!addr_exp && selected_frame_level >= 0) |
| 818 | { |
| 819 | printf_filtered ("Stack level %d, frame at ", selected_frame_level); |
| 820 | print_address_numeric (fi->frame, 1, gdb_stdout); |
| 821 | printf_filtered (":\n"); |
| 822 | } |
| 823 | else |
| 824 | { |
| 825 | printf_filtered ("Stack frame at "); |
| 826 | print_address_numeric (fi->frame, 1, gdb_stdout); |
| 827 | printf_filtered (":\n"); |
| 828 | } |
| 829 | printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM)); |
| 830 | print_address_numeric (fi->pc, 1, gdb_stdout); |
| 831 | |
| 832 | wrap_here (" "); |
| 833 | if (funname) |
| 834 | { |
| 835 | printf_filtered (" in "); |
| 836 | fprintf_symbol_filtered (gdb_stdout, funname, funlang, |
| 837 | DMGL_ANSI | DMGL_PARAMS); |
| 838 | } |
| 839 | wrap_here (" "); |
| 840 | if (sal.symtab) |
| 841 | printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line); |
| 842 | puts_filtered ("; "); |
| 843 | wrap_here (" "); |
| 844 | printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM)); |
| 845 | print_address_numeric (FRAME_SAVED_PC (fi), 1, gdb_stdout); |
| 846 | printf_filtered ("\n"); |
| 847 | |
| 848 | { |
| 849 | int frameless; |
| 850 | frameless = FRAMELESS_FUNCTION_INVOCATION (fi); |
| 851 | if (frameless) |
| 852 | printf_filtered (" (FRAMELESS),"); |
| 853 | } |
| 854 | |
| 855 | if (calling_frame_info) |
| 856 | { |
| 857 | printf_filtered (" called by frame at "); |
| 858 | print_address_numeric (calling_frame_info->frame, 1, gdb_stdout); |
| 859 | } |
| 860 | if (fi->next && calling_frame_info) |
| 861 | puts_filtered (","); |
| 862 | wrap_here (" "); |
| 863 | if (fi->next) |
| 864 | { |
| 865 | printf_filtered (" caller of frame at "); |
| 866 | print_address_numeric (fi->next->frame, 1, gdb_stdout); |
| 867 | } |
| 868 | if (fi->next || calling_frame_info) |
| 869 | puts_filtered ("\n"); |
| 870 | if (s) |
| 871 | printf_filtered (" source language %s.\n", language_str (s->language)); |
| 872 | |
| 873 | #ifdef PRINT_EXTRA_FRAME_INFO |
| 874 | PRINT_EXTRA_FRAME_INFO (fi); |
| 875 | #endif |
| 876 | |
| 877 | { |
| 878 | /* Address of the argument list for this frame, or 0. */ |
| 879 | CORE_ADDR arg_list = FRAME_ARGS_ADDRESS_CORRECT (fi); |
| 880 | /* Number of args for this frame, or -1 if unknown. */ |
| 881 | int numargs; |
| 882 | |
| 883 | if (arg_list == 0) |
| 884 | printf_filtered (" Arglist at unknown address.\n"); |
| 885 | else |
| 886 | { |
| 887 | printf_filtered (" Arglist at "); |
| 888 | print_address_numeric (arg_list, 1, gdb_stdout); |
| 889 | printf_filtered (","); |
| 890 | |
| 891 | numargs = FRAME_NUM_ARGS (fi); |
| 892 | if (numargs < 0) |
| 893 | puts_filtered (" args: "); |
| 894 | else if (numargs == 0) |
| 895 | puts_filtered (" no args."); |
| 896 | else if (numargs == 1) |
| 897 | puts_filtered (" 1 arg: "); |
| 898 | else |
| 899 | printf_filtered (" %d args: ", numargs); |
| 900 | print_frame_args (func, fi, numargs, gdb_stdout); |
| 901 | puts_filtered ("\n"); |
| 902 | } |
| 903 | } |
| 904 | { |
| 905 | /* Address of the local variables for this frame, or 0. */ |
| 906 | CORE_ADDR arg_list = FRAME_LOCALS_ADDRESS (fi); |
| 907 | |
| 908 | if (arg_list == 0) |
| 909 | printf_filtered (" Locals at unknown address,"); |
| 910 | else |
| 911 | { |
| 912 | printf_filtered (" Locals at "); |
| 913 | print_address_numeric (arg_list, 1, gdb_stdout); |
| 914 | printf_filtered (","); |
| 915 | } |
| 916 | } |
| 917 | |
| 918 | FRAME_INIT_SAVED_REGS (fi); |
| 919 | if (fi->saved_regs != NULL) |
| 920 | { |
| 921 | /* The sp is special; what's returned isn't the save address, but |
| 922 | actually the value of the previous frame's sp. */ |
| 923 | printf_filtered (" Previous frame's sp is "); |
| 924 | print_address_numeric (fi->saved_regs[SP_REGNUM], 1, gdb_stdout); |
| 925 | printf_filtered ("\n"); |
| 926 | count = 0; |
| 927 | numregs = NUM_REGS + NUM_PSEUDO_REGS; |
| 928 | for (i = 0; i < numregs; i++) |
| 929 | if (fi->saved_regs[i] && i != SP_REGNUM) |
| 930 | { |
| 931 | if (count == 0) |
| 932 | puts_filtered (" Saved registers:\n "); |
| 933 | else |
| 934 | puts_filtered (","); |
| 935 | wrap_here (" "); |
| 936 | printf_filtered (" %s at ", REGISTER_NAME (i)); |
| 937 | print_address_numeric (fi->saved_regs[i], 1, gdb_stdout); |
| 938 | count++; |
| 939 | } |
| 940 | if (count) |
| 941 | puts_filtered ("\n"); |
| 942 | } |
| 943 | else |
| 944 | { |
| 945 | /* We could get some information about saved registers by |
| 946 | calling get_saved_register on each register. Which info goes |
| 947 | with which frame is necessarily lost, however, and I suspect |
| 948 | that the users don't care whether they get the info. */ |
| 949 | puts_filtered ("\n"); |
| 950 | } |
| 951 | } |
| 952 | |
| 953 | #if 0 |
| 954 | /* Set a limit on the number of frames printed by default in a |
| 955 | backtrace. */ |
| 956 | |
| 957 | static int backtrace_limit; |
| 958 | |
| 959 | static void |
| 960 | set_backtrace_limit_command (char *count_exp, int from_tty) |
| 961 | { |
| 962 | int count = parse_and_eval_long (count_exp); |
| 963 | |
| 964 | if (count < 0) |
| 965 | error ("Negative argument not meaningful as backtrace limit."); |
| 966 | |
| 967 | backtrace_limit = count; |
| 968 | } |
| 969 | |
| 970 | static void |
| 971 | backtrace_limit_info (char *arg, int from_tty) |
| 972 | { |
| 973 | if (arg) |
| 974 | error ("\"Info backtrace-limit\" takes no arguments."); |
| 975 | |
| 976 | printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit); |
| 977 | } |
| 978 | #endif |
| 979 | |
| 980 | /* Print briefly all stack frames or just the innermost COUNT frames. */ |
| 981 | |
| 982 | static void backtrace_command_1 (char *count_exp, int show_locals, |
| 983 | int from_tty); |
| 984 | static void |
| 985 | backtrace_command_1 (char *count_exp, int show_locals, int from_tty) |
| 986 | { |
| 987 | struct frame_info *fi; |
| 988 | register int count; |
| 989 | register int i; |
| 990 | register struct frame_info *trailing; |
| 991 | register int trailing_level; |
| 992 | |
| 993 | if (!target_has_stack) |
| 994 | error ("No stack."); |
| 995 | |
| 996 | /* The following code must do two things. First, it must |
| 997 | set the variable TRAILING to the frame from which we should start |
| 998 | printing. Second, it must set the variable count to the number |
| 999 | of frames which we should print, or -1 if all of them. */ |
| 1000 | trailing = get_current_frame (); |
| 1001 | |
| 1002 | /* The target can be in a state where there is no valid frames |
| 1003 | (e.g., just connected). */ |
| 1004 | if (trailing == NULL) |
| 1005 | error ("No stack."); |
| 1006 | |
| 1007 | trailing_level = 0; |
| 1008 | if (count_exp) |
| 1009 | { |
| 1010 | count = parse_and_eval_long (count_exp); |
| 1011 | if (count < 0) |
| 1012 | { |
| 1013 | struct frame_info *current; |
| 1014 | |
| 1015 | count = -count; |
| 1016 | |
| 1017 | current = trailing; |
| 1018 | while (current && count--) |
| 1019 | { |
| 1020 | QUIT; |
| 1021 | current = get_prev_frame (current); |
| 1022 | } |
| 1023 | |
| 1024 | /* Will stop when CURRENT reaches the top of the stack. TRAILING |
| 1025 | will be COUNT below it. */ |
| 1026 | while (current) |
| 1027 | { |
| 1028 | QUIT; |
| 1029 | trailing = get_prev_frame (trailing); |
| 1030 | current = get_prev_frame (current); |
| 1031 | trailing_level++; |
| 1032 | } |
| 1033 | |
| 1034 | count = -1; |
| 1035 | } |
| 1036 | } |
| 1037 | else |
| 1038 | count = -1; |
| 1039 | |
| 1040 | if (info_verbose) |
| 1041 | { |
| 1042 | struct partial_symtab *ps; |
| 1043 | |
| 1044 | /* Read in symbols for all of the frames. Need to do this in |
| 1045 | a separate pass so that "Reading in symbols for xxx" messages |
| 1046 | don't screw up the appearance of the backtrace. Also |
| 1047 | if people have strong opinions against reading symbols for |
| 1048 | backtrace this may have to be an option. */ |
| 1049 | i = count; |
| 1050 | for (fi = trailing; |
| 1051 | fi != NULL && i--; |
| 1052 | fi = get_prev_frame (fi)) |
| 1053 | { |
| 1054 | QUIT; |
| 1055 | ps = find_pc_psymtab (fi->pc); |
| 1056 | if (ps) |
| 1057 | PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */ |
| 1058 | } |
| 1059 | } |
| 1060 | |
| 1061 | for (i = 0, fi = trailing; |
| 1062 | fi && count--; |
| 1063 | i++, fi = get_prev_frame (fi)) |
| 1064 | { |
| 1065 | QUIT; |
| 1066 | |
| 1067 | /* Don't use print_stack_frame; if an error() occurs it probably |
| 1068 | means further attempts to backtrace would fail (on the other |
| 1069 | hand, perhaps the code does or could be fixed to make sure |
| 1070 | the frame->prev field gets set to NULL in that case). */ |
| 1071 | print_frame_info_base (fi, trailing_level + i, 0, 1); |
| 1072 | if (show_locals) |
| 1073 | print_frame_local_vars (fi, 1, gdb_stdout); |
| 1074 | } |
| 1075 | |
| 1076 | /* If we've stopped before the end, mention that. */ |
| 1077 | if (fi && from_tty) |
| 1078 | printf_filtered ("(More stack frames follow...)\n"); |
| 1079 | } |
| 1080 | |
| 1081 | static void |
| 1082 | backtrace_command (char *arg, int from_tty) |
| 1083 | { |
| 1084 | struct cleanup *old_chain = (struct cleanup *) NULL; |
| 1085 | char **argv = (char **) NULL; |
| 1086 | int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0; |
| 1087 | char *argPtr = arg; |
| 1088 | |
| 1089 | if (arg != (char *) NULL) |
| 1090 | { |
| 1091 | int i; |
| 1092 | |
| 1093 | argv = buildargv (arg); |
| 1094 | old_chain = make_cleanup_freeargv (argv); |
| 1095 | argc = 0; |
| 1096 | for (i = 0; (argv[i] != (char *) NULL); i++) |
| 1097 | { |
| 1098 | unsigned int j; |
| 1099 | |
| 1100 | for (j = 0; (j < strlen (argv[i])); j++) |
| 1101 | argv[i][j] = tolower (argv[i][j]); |
| 1102 | |
| 1103 | if (argIndicatingFullTrace < 0 && subset_compare (argv[i], "full")) |
| 1104 | argIndicatingFullTrace = argc; |
| 1105 | else |
| 1106 | { |
| 1107 | argc++; |
| 1108 | totArgLen += strlen (argv[i]); |
| 1109 | } |
| 1110 | } |
| 1111 | totArgLen += argc; |
| 1112 | if (argIndicatingFullTrace >= 0) |
| 1113 | { |
| 1114 | if (totArgLen > 0) |
| 1115 | { |
| 1116 | argPtr = (char *) xmalloc (totArgLen + 1); |
| 1117 | if (!argPtr) |
| 1118 | nomem (0); |
| 1119 | else |
| 1120 | { |
| 1121 | memset (argPtr, 0, totArgLen + 1); |
| 1122 | for (i = 0; (i < (argc + 1)); i++) |
| 1123 | { |
| 1124 | if (i != argIndicatingFullTrace) |
| 1125 | { |
| 1126 | strcat (argPtr, argv[i]); |
| 1127 | strcat (argPtr, " "); |
| 1128 | } |
| 1129 | } |
| 1130 | } |
| 1131 | } |
| 1132 | else |
| 1133 | argPtr = (char *) NULL; |
| 1134 | } |
| 1135 | } |
| 1136 | |
| 1137 | backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty); |
| 1138 | |
| 1139 | if (argIndicatingFullTrace >= 0 && totArgLen > 0) |
| 1140 | xfree (argPtr); |
| 1141 | |
| 1142 | if (old_chain) |
| 1143 | do_cleanups (old_chain); |
| 1144 | } |
| 1145 | |
| 1146 | static void backtrace_full_command (char *arg, int from_tty); |
| 1147 | static void |
| 1148 | backtrace_full_command (char *arg, int from_tty) |
| 1149 | { |
| 1150 | backtrace_command_1 (arg, 1, from_tty); |
| 1151 | } |
| 1152 | \f |
| 1153 | |
| 1154 | /* Print the local variables of a block B active in FRAME. |
| 1155 | Return 1 if any variables were printed; 0 otherwise. */ |
| 1156 | |
| 1157 | static int |
| 1158 | print_block_frame_locals (struct block *b, register struct frame_info *fi, |
| 1159 | int num_tabs, register struct ui_file *stream) |
| 1160 | { |
| 1161 | register int i, j; |
| 1162 | register struct symbol *sym; |
| 1163 | register int values_printed = 0; |
| 1164 | |
| 1165 | ALL_BLOCK_SYMBOLS (b, i, sym) |
| 1166 | { |
| 1167 | switch (SYMBOL_CLASS (sym)) |
| 1168 | { |
| 1169 | case LOC_LOCAL: |
| 1170 | case LOC_REGISTER: |
| 1171 | case LOC_STATIC: |
| 1172 | case LOC_BASEREG: |
| 1173 | values_printed = 1; |
| 1174 | for (j = 0; j < num_tabs; j++) |
| 1175 | fputs_filtered ("\t", stream); |
| 1176 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream); |
| 1177 | fputs_filtered (" = ", stream); |
| 1178 | print_variable_value (sym, fi, stream); |
| 1179 | fprintf_filtered (stream, "\n"); |
| 1180 | break; |
| 1181 | |
| 1182 | default: |
| 1183 | /* Ignore symbols which are not locals. */ |
| 1184 | break; |
| 1185 | } |
| 1186 | } |
| 1187 | return values_printed; |
| 1188 | } |
| 1189 | |
| 1190 | /* Same, but print labels. */ |
| 1191 | |
| 1192 | static int |
| 1193 | print_block_frame_labels (struct block *b, int *have_default, |
| 1194 | register struct ui_file *stream) |
| 1195 | { |
| 1196 | register int i; |
| 1197 | register struct symbol *sym; |
| 1198 | register int values_printed = 0; |
| 1199 | |
| 1200 | ALL_BLOCK_SYMBOLS (b, i, sym) |
| 1201 | { |
| 1202 | if (STREQ (SYMBOL_NAME (sym), "default")) |
| 1203 | { |
| 1204 | if (*have_default) |
| 1205 | continue; |
| 1206 | *have_default = 1; |
| 1207 | } |
| 1208 | if (SYMBOL_CLASS (sym) == LOC_LABEL) |
| 1209 | { |
| 1210 | struct symtab_and_line sal; |
| 1211 | sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0); |
| 1212 | values_printed = 1; |
| 1213 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream); |
| 1214 | if (addressprint) |
| 1215 | { |
| 1216 | fprintf_filtered (stream, " "); |
| 1217 | print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, stream); |
| 1218 | } |
| 1219 | fprintf_filtered (stream, " in file %s, line %d\n", |
| 1220 | sal.symtab->filename, sal.line); |
| 1221 | } |
| 1222 | } |
| 1223 | return values_printed; |
| 1224 | } |
| 1225 | |
| 1226 | /* Print on STREAM all the local variables in frame FRAME, |
| 1227 | including all the blocks active in that frame |
| 1228 | at its current pc. |
| 1229 | |
| 1230 | Returns 1 if the job was done, |
| 1231 | or 0 if nothing was printed because we have no info |
| 1232 | on the function running in FRAME. */ |
| 1233 | |
| 1234 | static void |
| 1235 | print_frame_local_vars (register struct frame_info *fi, register int num_tabs, |
| 1236 | register struct ui_file *stream) |
| 1237 | { |
| 1238 | register struct block *block = get_frame_block (fi); |
| 1239 | register int values_printed = 0; |
| 1240 | |
| 1241 | if (block == 0) |
| 1242 | { |
| 1243 | fprintf_filtered (stream, "No symbol table info available.\n"); |
| 1244 | return; |
| 1245 | } |
| 1246 | |
| 1247 | while (block != 0) |
| 1248 | { |
| 1249 | if (print_block_frame_locals (block, fi, num_tabs, stream)) |
| 1250 | values_printed = 1; |
| 1251 | /* After handling the function's top-level block, stop. |
| 1252 | Don't continue to its superblock, the block of |
| 1253 | per-file symbols. */ |
| 1254 | if (BLOCK_FUNCTION (block)) |
| 1255 | break; |
| 1256 | block = BLOCK_SUPERBLOCK (block); |
| 1257 | } |
| 1258 | |
| 1259 | if (!values_printed) |
| 1260 | { |
| 1261 | fprintf_filtered (stream, "No locals.\n"); |
| 1262 | } |
| 1263 | } |
| 1264 | |
| 1265 | /* Same, but print labels. */ |
| 1266 | |
| 1267 | static void |
| 1268 | print_frame_label_vars (register struct frame_info *fi, int this_level_only, |
| 1269 | register struct ui_file *stream) |
| 1270 | { |
| 1271 | register struct blockvector *bl; |
| 1272 | register struct block *block = get_frame_block (fi); |
| 1273 | register int values_printed = 0; |
| 1274 | int index, have_default = 0; |
| 1275 | char *blocks_printed; |
| 1276 | CORE_ADDR pc = fi->pc; |
| 1277 | |
| 1278 | if (block == 0) |
| 1279 | { |
| 1280 | fprintf_filtered (stream, "No symbol table info available.\n"); |
| 1281 | return; |
| 1282 | } |
| 1283 | |
| 1284 | bl = blockvector_for_pc (BLOCK_END (block) - 4, &index); |
| 1285 | blocks_printed = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 1286 | memset (blocks_printed, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char)); |
| 1287 | |
| 1288 | while (block != 0) |
| 1289 | { |
| 1290 | CORE_ADDR end = BLOCK_END (block) - 4; |
| 1291 | int last_index; |
| 1292 | |
| 1293 | if (bl != blockvector_for_pc (end, &index)) |
| 1294 | error ("blockvector blotch"); |
| 1295 | if (BLOCKVECTOR_BLOCK (bl, index) != block) |
| 1296 | error ("blockvector botch"); |
| 1297 | last_index = BLOCKVECTOR_NBLOCKS (bl); |
| 1298 | index += 1; |
| 1299 | |
| 1300 | /* Don't print out blocks that have gone by. */ |
| 1301 | while (index < last_index |
| 1302 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc) |
| 1303 | index++; |
| 1304 | |
| 1305 | while (index < last_index |
| 1306 | && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end) |
| 1307 | { |
| 1308 | if (blocks_printed[index] == 0) |
| 1309 | { |
| 1310 | if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl, index), &have_default, stream)) |
| 1311 | values_printed = 1; |
| 1312 | blocks_printed[index] = 1; |
| 1313 | } |
| 1314 | index++; |
| 1315 | } |
| 1316 | if (have_default) |
| 1317 | return; |
| 1318 | if (values_printed && this_level_only) |
| 1319 | return; |
| 1320 | |
| 1321 | /* After handling the function's top-level block, stop. |
| 1322 | Don't continue to its superblock, the block of |
| 1323 | per-file symbols. */ |
| 1324 | if (BLOCK_FUNCTION (block)) |
| 1325 | break; |
| 1326 | block = BLOCK_SUPERBLOCK (block); |
| 1327 | } |
| 1328 | |
| 1329 | if (!values_printed && !this_level_only) |
| 1330 | { |
| 1331 | fprintf_filtered (stream, "No catches.\n"); |
| 1332 | } |
| 1333 | } |
| 1334 | |
| 1335 | /* ARGSUSED */ |
| 1336 | void |
| 1337 | locals_info (char *args, int from_tty) |
| 1338 | { |
| 1339 | if (!selected_frame) |
| 1340 | error ("No frame selected."); |
| 1341 | print_frame_local_vars (selected_frame, 0, gdb_stdout); |
| 1342 | } |
| 1343 | |
| 1344 | static void |
| 1345 | catch_info (char *ignore, int from_tty) |
| 1346 | { |
| 1347 | struct symtab_and_line *sal; |
| 1348 | |
| 1349 | /* Check for target support for exception handling */ |
| 1350 | sal = target_enable_exception_callback (EX_EVENT_CATCH, 1); |
| 1351 | if (sal) |
| 1352 | { |
| 1353 | /* Currently not handling this */ |
| 1354 | /* Ideally, here we should interact with the C++ runtime |
| 1355 | system to find the list of active handlers, etc. */ |
| 1356 | fprintf_filtered (gdb_stdout, "Info catch not supported with this target/compiler combination.\n"); |
| 1357 | #if 0 |
| 1358 | if (!selected_frame) |
| 1359 | error ("No frame selected."); |
| 1360 | #endif |
| 1361 | } |
| 1362 | else |
| 1363 | { |
| 1364 | /* Assume g++ compiled code -- old v 4.16 behaviour */ |
| 1365 | if (!selected_frame) |
| 1366 | error ("No frame selected."); |
| 1367 | |
| 1368 | print_frame_label_vars (selected_frame, 0, gdb_stdout); |
| 1369 | } |
| 1370 | } |
| 1371 | |
| 1372 | static void |
| 1373 | print_frame_arg_vars (register struct frame_info *fi, |
| 1374 | register struct ui_file *stream) |
| 1375 | { |
| 1376 | struct symbol *func = get_frame_function (fi); |
| 1377 | register struct block *b; |
| 1378 | register int i; |
| 1379 | register struct symbol *sym, *sym2; |
| 1380 | register int values_printed = 0; |
| 1381 | |
| 1382 | if (func == 0) |
| 1383 | { |
| 1384 | fprintf_filtered (stream, "No symbol table info available.\n"); |
| 1385 | return; |
| 1386 | } |
| 1387 | |
| 1388 | b = SYMBOL_BLOCK_VALUE (func); |
| 1389 | ALL_BLOCK_SYMBOLS (b, i, sym) |
| 1390 | { |
| 1391 | switch (SYMBOL_CLASS (sym)) |
| 1392 | { |
| 1393 | case LOC_ARG: |
| 1394 | case LOC_LOCAL_ARG: |
| 1395 | case LOC_REF_ARG: |
| 1396 | case LOC_REGPARM: |
| 1397 | case LOC_REGPARM_ADDR: |
| 1398 | case LOC_BASEREG_ARG: |
| 1399 | values_printed = 1; |
| 1400 | fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream); |
| 1401 | fputs_filtered (" = ", stream); |
| 1402 | |
| 1403 | /* We have to look up the symbol because arguments can have |
| 1404 | two entries (one a parameter, one a local) and the one we |
| 1405 | want is the local, which lookup_symbol will find for us. |
| 1406 | This includes gcc1 (not gcc2) on the sparc when passing a |
| 1407 | small structure and gcc2 when the argument type is float |
| 1408 | and it is passed as a double and converted to float by |
| 1409 | the prologue (in the latter case the type of the LOC_ARG |
| 1410 | symbol is double and the type of the LOC_LOCAL symbol is |
| 1411 | float). There are also LOC_ARG/LOC_REGISTER pairs which |
| 1412 | are not combined in symbol-reading. */ |
| 1413 | |
| 1414 | sym2 = lookup_symbol (SYMBOL_NAME (sym), |
| 1415 | b, VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL); |
| 1416 | print_variable_value (sym2, fi, stream); |
| 1417 | fprintf_filtered (stream, "\n"); |
| 1418 | break; |
| 1419 | |
| 1420 | default: |
| 1421 | /* Don't worry about things which aren't arguments. */ |
| 1422 | break; |
| 1423 | } |
| 1424 | } |
| 1425 | if (!values_printed) |
| 1426 | { |
| 1427 | fprintf_filtered (stream, "No arguments.\n"); |
| 1428 | } |
| 1429 | } |
| 1430 | |
| 1431 | void |
| 1432 | args_info (char *ignore, int from_tty) |
| 1433 | { |
| 1434 | if (!selected_frame) |
| 1435 | error ("No frame selected."); |
| 1436 | print_frame_arg_vars (selected_frame, gdb_stdout); |
| 1437 | } |
| 1438 | |
| 1439 | |
| 1440 | static void |
| 1441 | args_plus_locals_info (char *ignore, int from_tty) |
| 1442 | { |
| 1443 | args_info (ignore, from_tty); |
| 1444 | locals_info (ignore, from_tty); |
| 1445 | } |
| 1446 | \f |
| 1447 | |
| 1448 | /* Select frame FI, and note that its stack level is LEVEL. |
| 1449 | LEVEL may be -1 if an actual level number is not known. */ |
| 1450 | |
| 1451 | void |
| 1452 | select_frame (struct frame_info *fi, int level) |
| 1453 | { |
| 1454 | register struct symtab *s; |
| 1455 | |
| 1456 | selected_frame = fi; |
| 1457 | selected_frame_level = level; |
| 1458 | if (selected_frame_level_changed_hook) |
| 1459 | selected_frame_level_changed_hook (level); |
| 1460 | |
| 1461 | /* Ensure that symbols for this frame are read in. Also, determine the |
| 1462 | source language of this frame, and switch to it if desired. */ |
| 1463 | if (fi) |
| 1464 | { |
| 1465 | s = find_pc_symtab (fi->pc); |
| 1466 | if (s |
| 1467 | && s->language != current_language->la_language |
| 1468 | && s->language != language_unknown |
| 1469 | && language_mode == language_mode_auto) |
| 1470 | { |
| 1471 | set_language (s->language); |
| 1472 | } |
| 1473 | } |
| 1474 | } |
| 1475 | \f |
| 1476 | |
| 1477 | /* Select frame FI, noting that its stack level is LEVEL. Also print |
| 1478 | the stack frame and show the source if this is the tui version. */ |
| 1479 | void |
| 1480 | select_and_print_frame (struct frame_info *fi, int level) |
| 1481 | { |
| 1482 | select_frame (fi, level); |
| 1483 | if (fi) |
| 1484 | { |
| 1485 | print_stack_frame (fi, level, 1); |
| 1486 | } |
| 1487 | } |
| 1488 | \f |
| 1489 | |
| 1490 | /* Store the selected frame and its level into *FRAMEP and *LEVELP. |
| 1491 | If there is no selected frame, *FRAMEP is set to NULL. */ |
| 1492 | |
| 1493 | void |
| 1494 | record_selected_frame (CORE_ADDR *frameaddrp, int *levelp) |
| 1495 | { |
| 1496 | *frameaddrp = selected_frame ? selected_frame->frame : 0; |
| 1497 | *levelp = selected_frame_level; |
| 1498 | } |
| 1499 | |
| 1500 | /* Return the symbol-block in which the selected frame is executing. |
| 1501 | Can return zero under various legitimate circumstances. */ |
| 1502 | |
| 1503 | struct block * |
| 1504 | get_selected_block (void) |
| 1505 | { |
| 1506 | if (!target_has_stack) |
| 1507 | return 0; |
| 1508 | |
| 1509 | if (!selected_frame) |
| 1510 | return get_current_block (); |
| 1511 | return get_frame_block (selected_frame); |
| 1512 | } |
| 1513 | |
| 1514 | /* Find a frame a certain number of levels away from FRAME. |
| 1515 | LEVEL_OFFSET_PTR points to an int containing the number of levels. |
| 1516 | Positive means go to earlier frames (up); negative, the reverse. |
| 1517 | The int that contains the number of levels is counted toward |
| 1518 | zero as the frames for those levels are found. |
| 1519 | If the top or bottom frame is reached, that frame is returned, |
| 1520 | but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates |
| 1521 | how much farther the original request asked to go. */ |
| 1522 | |
| 1523 | struct frame_info * |
| 1524 | find_relative_frame (register struct frame_info *frame, |
| 1525 | register int *level_offset_ptr) |
| 1526 | { |
| 1527 | register struct frame_info *prev; |
| 1528 | register struct frame_info *frame1; |
| 1529 | |
| 1530 | /* Going up is simple: just do get_prev_frame enough times |
| 1531 | or until initial frame is reached. */ |
| 1532 | while (*level_offset_ptr > 0) |
| 1533 | { |
| 1534 | prev = get_prev_frame (frame); |
| 1535 | if (prev == 0) |
| 1536 | break; |
| 1537 | (*level_offset_ptr)--; |
| 1538 | frame = prev; |
| 1539 | } |
| 1540 | /* Going down is just as simple. */ |
| 1541 | if (*level_offset_ptr < 0) |
| 1542 | { |
| 1543 | while (*level_offset_ptr < 0) |
| 1544 | { |
| 1545 | frame1 = get_next_frame (frame); |
| 1546 | if (!frame1) |
| 1547 | break; |
| 1548 | frame = frame1; |
| 1549 | (*level_offset_ptr)++; |
| 1550 | } |
| 1551 | } |
| 1552 | return frame; |
| 1553 | } |
| 1554 | |
| 1555 | /* The "select_frame" command. With no arg, NOP. |
| 1556 | With arg LEVEL_EXP, select the frame at level LEVEL if it is a |
| 1557 | valid level. Otherwise, treat level_exp as an address expression |
| 1558 | and select it. See parse_frame_specification for more info on proper |
| 1559 | frame expressions. */ |
| 1560 | |
| 1561 | /* ARGSUSED */ |
| 1562 | void |
| 1563 | select_frame_command_wrapper (char *level_exp, int from_tty) |
| 1564 | { |
| 1565 | select_frame_command (level_exp, from_tty); |
| 1566 | } |
| 1567 | |
| 1568 | static void |
| 1569 | select_frame_command (char *level_exp, int from_tty) |
| 1570 | { |
| 1571 | register struct frame_info *frame, *frame1; |
| 1572 | unsigned int level = 0; |
| 1573 | |
| 1574 | if (!target_has_stack) |
| 1575 | error ("No stack."); |
| 1576 | |
| 1577 | frame = parse_frame_specification (level_exp); |
| 1578 | |
| 1579 | /* Try to figure out what level this frame is. But if there is |
| 1580 | no current stack, don't error out -- let the user set one. */ |
| 1581 | frame1 = 0; |
| 1582 | if (get_current_frame ()) |
| 1583 | { |
| 1584 | for (frame1 = get_prev_frame (0); |
| 1585 | frame1 && frame1 != frame; |
| 1586 | frame1 = get_prev_frame (frame1)) |
| 1587 | level++; |
| 1588 | } |
| 1589 | |
| 1590 | if (!frame1) |
| 1591 | level = 0; |
| 1592 | |
| 1593 | select_frame (frame, level); |
| 1594 | } |
| 1595 | |
| 1596 | /* The "frame" command. With no arg, print selected frame briefly. |
| 1597 | With arg, behaves like select_frame and then prints the selected |
| 1598 | frame. */ |
| 1599 | |
| 1600 | void |
| 1601 | frame_command (char *level_exp, int from_tty) |
| 1602 | { |
| 1603 | select_frame_command (level_exp, from_tty); |
| 1604 | show_and_print_stack_frame (selected_frame, selected_frame_level, 1); |
| 1605 | } |
| 1606 | |
| 1607 | /* The XDB Compatibility command to print the current frame. */ |
| 1608 | |
| 1609 | static void |
| 1610 | current_frame_command (char *level_exp, int from_tty) |
| 1611 | { |
| 1612 | if (target_has_stack == 0 || selected_frame == 0) |
| 1613 | error ("No stack."); |
| 1614 | print_only_stack_frame (selected_frame, selected_frame_level, 1); |
| 1615 | } |
| 1616 | |
| 1617 | /* Select the frame up one or COUNT stack levels |
| 1618 | from the previously selected frame, and print it briefly. */ |
| 1619 | |
| 1620 | /* ARGSUSED */ |
| 1621 | static void |
| 1622 | up_silently_base (char *count_exp) |
| 1623 | { |
| 1624 | register struct frame_info *fi; |
| 1625 | int count = 1, count1; |
| 1626 | if (count_exp) |
| 1627 | count = parse_and_eval_long (count_exp); |
| 1628 | count1 = count; |
| 1629 | |
| 1630 | if (target_has_stack == 0 || selected_frame == 0) |
| 1631 | error ("No stack."); |
| 1632 | |
| 1633 | fi = find_relative_frame (selected_frame, &count1); |
| 1634 | if (count1 != 0 && count_exp == 0) |
| 1635 | error ("Initial frame selected; you cannot go up."); |
| 1636 | select_frame (fi, selected_frame_level + count - count1); |
| 1637 | } |
| 1638 | |
| 1639 | static void |
| 1640 | up_silently_command (char *count_exp, int from_tty) |
| 1641 | { |
| 1642 | up_silently_base (count_exp); |
| 1643 | } |
| 1644 | |
| 1645 | static void |
| 1646 | up_command (char *count_exp, int from_tty) |
| 1647 | { |
| 1648 | up_silently_base (count_exp); |
| 1649 | show_and_print_stack_frame (selected_frame, selected_frame_level, 1); |
| 1650 | } |
| 1651 | |
| 1652 | /* Select the frame down one or COUNT stack levels |
| 1653 | from the previously selected frame, and print it briefly. */ |
| 1654 | |
| 1655 | /* ARGSUSED */ |
| 1656 | static void |
| 1657 | down_silently_base (char *count_exp) |
| 1658 | { |
| 1659 | register struct frame_info *frame; |
| 1660 | int count = -1, count1; |
| 1661 | if (count_exp) |
| 1662 | count = -parse_and_eval_long (count_exp); |
| 1663 | count1 = count; |
| 1664 | |
| 1665 | if (target_has_stack == 0 || selected_frame == 0) |
| 1666 | error ("No stack."); |
| 1667 | |
| 1668 | frame = find_relative_frame (selected_frame, &count1); |
| 1669 | if (count1 != 0 && count_exp == 0) |
| 1670 | { |
| 1671 | |
| 1672 | /* We only do this if count_exp is not specified. That way "down" |
| 1673 | means to really go down (and let me know if that is |
| 1674 | impossible), but "down 9999" can be used to mean go all the way |
| 1675 | down without getting an error. */ |
| 1676 | |
| 1677 | error ("Bottom (i.e., innermost) frame selected; you cannot go down."); |
| 1678 | } |
| 1679 | |
| 1680 | select_frame (frame, selected_frame_level + count - count1); |
| 1681 | } |
| 1682 | |
| 1683 | /* ARGSUSED */ |
| 1684 | static void |
| 1685 | down_silently_command (char *count_exp, int from_tty) |
| 1686 | { |
| 1687 | down_silently_base (count_exp); |
| 1688 | } |
| 1689 | |
| 1690 | static void |
| 1691 | down_command (char *count_exp, int from_tty) |
| 1692 | { |
| 1693 | down_silently_base (count_exp); |
| 1694 | show_and_print_stack_frame (selected_frame, selected_frame_level, 1); |
| 1695 | } |
| 1696 | \f |
| 1697 | void |
| 1698 | return_command_wrapper (char *retval_exp, int from_tty) |
| 1699 | { |
| 1700 | return_command (retval_exp, from_tty); |
| 1701 | } |
| 1702 | |
| 1703 | static void |
| 1704 | return_command (char *retval_exp, int from_tty) |
| 1705 | { |
| 1706 | struct symbol *thisfun; |
| 1707 | CORE_ADDR selected_frame_addr; |
| 1708 | CORE_ADDR selected_frame_pc; |
| 1709 | struct frame_info *frame; |
| 1710 | struct value *return_value = NULL; |
| 1711 | |
| 1712 | if (selected_frame == NULL) |
| 1713 | error ("No selected frame."); |
| 1714 | thisfun = get_frame_function (selected_frame); |
| 1715 | selected_frame_addr = FRAME_FP (selected_frame); |
| 1716 | selected_frame_pc = selected_frame->pc; |
| 1717 | |
| 1718 | /* Compute the return value (if any -- possibly getting errors here). */ |
| 1719 | |
| 1720 | if (retval_exp) |
| 1721 | { |
| 1722 | struct type *return_type = NULL; |
| 1723 | |
| 1724 | return_value = parse_and_eval (retval_exp); |
| 1725 | |
| 1726 | /* Cast return value to the return type of the function. */ |
| 1727 | if (thisfun != NULL) |
| 1728 | return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun)); |
| 1729 | if (return_type == NULL) |
| 1730 | return_type = builtin_type_int; |
| 1731 | return_value = value_cast (return_type, return_value); |
| 1732 | |
| 1733 | /* Make sure we have fully evaluated it, since |
| 1734 | it might live in the stack frame we're about to pop. */ |
| 1735 | if (VALUE_LAZY (return_value)) |
| 1736 | value_fetch_lazy (return_value); |
| 1737 | } |
| 1738 | |
| 1739 | /* If interactive, require confirmation. */ |
| 1740 | |
| 1741 | if (from_tty) |
| 1742 | { |
| 1743 | if (thisfun != 0) |
| 1744 | { |
| 1745 | if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun))) |
| 1746 | { |
| 1747 | error ("Not confirmed."); |
| 1748 | /* NOTREACHED */ |
| 1749 | } |
| 1750 | } |
| 1751 | else if (!query ("Make selected stack frame return now? ")) |
| 1752 | error ("Not confirmed."); |
| 1753 | } |
| 1754 | |
| 1755 | /* Do the real work. Pop until the specified frame is current. We |
| 1756 | use this method because the selected_frame is not valid after |
| 1757 | a POP_FRAME. The pc comparison makes this work even if the |
| 1758 | selected frame shares its fp with another frame. */ |
| 1759 | |
| 1760 | while (selected_frame_addr != (frame = get_current_frame ())->frame |
| 1761 | || selected_frame_pc != frame->pc) |
| 1762 | POP_FRAME; |
| 1763 | |
| 1764 | /* Then pop that frame. */ |
| 1765 | |
| 1766 | POP_FRAME; |
| 1767 | |
| 1768 | /* Compute the return value (if any) and store in the place |
| 1769 | for return values. */ |
| 1770 | |
| 1771 | if (retval_exp) |
| 1772 | set_return_value (return_value); |
| 1773 | |
| 1774 | /* If we are at the end of a call dummy now, pop the dummy frame too. */ |
| 1775 | |
| 1776 | if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (), |
| 1777 | FRAME_FP (get_current_frame ()))) |
| 1778 | POP_FRAME; |
| 1779 | |
| 1780 | /* If interactive, print the frame that is now current. */ |
| 1781 | |
| 1782 | if (from_tty) |
| 1783 | frame_command ("0", 1); |
| 1784 | else |
| 1785 | select_frame_command ("0", 0); |
| 1786 | } |
| 1787 | |
| 1788 | /* Sets the scope to input function name, provided that the |
| 1789 | function is within the current stack frame */ |
| 1790 | |
| 1791 | struct function_bounds |
| 1792 | { |
| 1793 | CORE_ADDR low, high; |
| 1794 | }; |
| 1795 | |
| 1796 | static void func_command (char *arg, int from_tty); |
| 1797 | static void |
| 1798 | func_command (char *arg, int from_tty) |
| 1799 | { |
| 1800 | struct frame_info *fp; |
| 1801 | int found = 0; |
| 1802 | struct symtabs_and_lines sals; |
| 1803 | int i; |
| 1804 | int level = 1; |
| 1805 | struct function_bounds *func_bounds = (struct function_bounds *) NULL; |
| 1806 | |
| 1807 | if (arg != (char *) NULL) |
| 1808 | return; |
| 1809 | |
| 1810 | fp = parse_frame_specification ("0"); |
| 1811 | sals = decode_line_spec (arg, 1); |
| 1812 | func_bounds = (struct function_bounds *) xmalloc ( |
| 1813 | sizeof (struct function_bounds) * sals.nelts); |
| 1814 | for (i = 0; (i < sals.nelts && !found); i++) |
| 1815 | { |
| 1816 | if (sals.sals[i].pc == (CORE_ADDR) 0 || |
| 1817 | find_pc_partial_function (sals.sals[i].pc, |
| 1818 | (char **) NULL, |
| 1819 | &func_bounds[i].low, |
| 1820 | &func_bounds[i].high) == 0) |
| 1821 | { |
| 1822 | func_bounds[i].low = |
| 1823 | func_bounds[i].high = (CORE_ADDR) NULL; |
| 1824 | } |
| 1825 | } |
| 1826 | |
| 1827 | do |
| 1828 | { |
| 1829 | for (i = 0; (i < sals.nelts && !found); i++) |
| 1830 | found = (fp->pc >= func_bounds[i].low && |
| 1831 | fp->pc < func_bounds[i].high); |
| 1832 | if (!found) |
| 1833 | { |
| 1834 | level = 1; |
| 1835 | fp = find_relative_frame (fp, &level); |
| 1836 | } |
| 1837 | } |
| 1838 | while (!found && level == 0); |
| 1839 | |
| 1840 | if (func_bounds) |
| 1841 | xfree (func_bounds); |
| 1842 | |
| 1843 | if (!found) |
| 1844 | printf_filtered ("'%s' not within current stack frame.\n", arg); |
| 1845 | else if (fp != selected_frame) |
| 1846 | select_and_print_frame (fp, level); |
| 1847 | } |
| 1848 | |
| 1849 | /* Gets the language of the current frame. */ |
| 1850 | |
| 1851 | enum language |
| 1852 | get_frame_language (void) |
| 1853 | { |
| 1854 | register struct symtab *s; |
| 1855 | enum language flang; /* The language of the current frame */ |
| 1856 | |
| 1857 | if (selected_frame) |
| 1858 | { |
| 1859 | s = find_pc_symtab (selected_frame->pc); |
| 1860 | if (s) |
| 1861 | flang = s->language; |
| 1862 | else |
| 1863 | flang = language_unknown; |
| 1864 | } |
| 1865 | else |
| 1866 | flang = language_unknown; |
| 1867 | |
| 1868 | return flang; |
| 1869 | } |
| 1870 | \f |
| 1871 | void |
| 1872 | _initialize_stack (void) |
| 1873 | { |
| 1874 | #if 0 |
| 1875 | backtrace_limit = 30; |
| 1876 | #endif |
| 1877 | |
| 1878 | add_com ("return", class_stack, return_command, |
| 1879 | "Make selected stack frame return to its caller.\n\ |
| 1880 | Control remains in the debugger, but when you continue\n\ |
| 1881 | execution will resume in the frame above the one now selected.\n\ |
| 1882 | If an argument is given, it is an expression for the value to return."); |
| 1883 | |
| 1884 | add_com ("up", class_stack, up_command, |
| 1885 | "Select and print stack frame that called this one.\n\ |
| 1886 | An argument says how many frames up to go."); |
| 1887 | add_com ("up-silently", class_support, up_silently_command, |
| 1888 | "Same as the `up' command, but does not print anything.\n\ |
| 1889 | This is useful in command scripts."); |
| 1890 | |
| 1891 | add_com ("down", class_stack, down_command, |
| 1892 | "Select and print stack frame called by this one.\n\ |
| 1893 | An argument says how many frames down to go."); |
| 1894 | add_com_alias ("do", "down", class_stack, 1); |
| 1895 | add_com_alias ("dow", "down", class_stack, 1); |
| 1896 | add_com ("down-silently", class_support, down_silently_command, |
| 1897 | "Same as the `down' command, but does not print anything.\n\ |
| 1898 | This is useful in command scripts."); |
| 1899 | |
| 1900 | add_com ("frame", class_stack, frame_command, |
| 1901 | "Select and print a stack frame.\n\ |
| 1902 | With no argument, print the selected stack frame. (See also \"info frame\").\n\ |
| 1903 | An argument specifies the frame to select.\n\ |
| 1904 | It can be a stack frame number or the address of the frame.\n\ |
| 1905 | With argument, nothing is printed if input is coming from\n\ |
| 1906 | a command file or a user-defined command."); |
| 1907 | |
| 1908 | add_com_alias ("f", "frame", class_stack, 1); |
| 1909 | |
| 1910 | if (xdb_commands) |
| 1911 | { |
| 1912 | add_com ("L", class_stack, current_frame_command, |
| 1913 | "Print the current stack frame.\n"); |
| 1914 | add_com_alias ("V", "frame", class_stack, 1); |
| 1915 | } |
| 1916 | add_com ("select-frame", class_stack, select_frame_command, |
| 1917 | "Select a stack frame without printing anything.\n\ |
| 1918 | An argument specifies the frame to select.\n\ |
| 1919 | It can be a stack frame number or the address of the frame.\n"); |
| 1920 | |
| 1921 | add_com ("backtrace", class_stack, backtrace_command, |
| 1922 | "Print backtrace of all stack frames, or innermost COUNT frames.\n\ |
| 1923 | With a negative argument, print outermost -COUNT frames.\n\ |
| 1924 | Use of the 'full' qualifier also prints the values of the local variables.\n"); |
| 1925 | add_com_alias ("bt", "backtrace", class_stack, 0); |
| 1926 | if (xdb_commands) |
| 1927 | { |
| 1928 | add_com_alias ("t", "backtrace", class_stack, 0); |
| 1929 | add_com ("T", class_stack, backtrace_full_command, |
| 1930 | "Print backtrace of all stack frames, or innermost COUNT frames \n\ |
| 1931 | and the values of the local variables.\n\ |
| 1932 | With a negative argument, print outermost -COUNT frames.\n\ |
| 1933 | Usage: T <count>\n"); |
| 1934 | } |
| 1935 | |
| 1936 | add_com_alias ("where", "backtrace", class_alias, 0); |
| 1937 | add_info ("stack", backtrace_command, |
| 1938 | "Backtrace of the stack, or innermost COUNT frames."); |
| 1939 | add_info_alias ("s", "stack", 1); |
| 1940 | add_info ("frame", frame_info, |
| 1941 | "All about selected stack frame, or frame at ADDR."); |
| 1942 | add_info_alias ("f", "frame", 1); |
| 1943 | add_info ("locals", locals_info, |
| 1944 | "Local variables of current stack frame."); |
| 1945 | add_info ("args", args_info, |
| 1946 | "Argument variables of current stack frame."); |
| 1947 | if (xdb_commands) |
| 1948 | add_com ("l", class_info, args_plus_locals_info, |
| 1949 | "Argument and local variables of current stack frame."); |
| 1950 | |
| 1951 | if (dbx_commands) |
| 1952 | add_com ("func", class_stack, func_command, |
| 1953 | "Select the stack frame that contains <func>.\nUsage: func <name>\n"); |
| 1954 | |
| 1955 | add_info ("catch", catch_info, |
| 1956 | "Exceptions that can be caught in the current stack frame."); |
| 1957 | |
| 1958 | #if 0 |
| 1959 | add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command, |
| 1960 | "Specify maximum number of frames for \"backtrace\" to print by default.", |
| 1961 | &setlist); |
| 1962 | add_info ("backtrace-limit", backtrace_limit_info, |
| 1963 | "The maximum number of frames for \"backtrace\" to print by default."); |
| 1964 | #endif |
| 1965 | } |