| 1 | /* Print and select stack frames for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "value.h" |
| 22 | #include "symtab.h" |
| 23 | #include "gdbtypes.h" |
| 24 | #include "expression.h" |
| 25 | #include "language.h" |
| 26 | #include "frame.h" |
| 27 | #include "gdbcmd.h" |
| 28 | #include "gdbcore.h" |
| 29 | #include "target.h" |
| 30 | #include "source.h" |
| 31 | #include "breakpoint.h" |
| 32 | #include "demangle.h" |
| 33 | #include "inferior.h" |
| 34 | #include "annotate.h" |
| 35 | #include "ui-out.h" |
| 36 | #include "block.h" |
| 37 | #include "stack.h" |
| 38 | #include "dictionary.h" |
| 39 | #include "reggroups.h" |
| 40 | #include "regcache.h" |
| 41 | #include "solib.h" |
| 42 | #include "valprint.h" |
| 43 | #include "gdbthread.h" |
| 44 | #include "cp-support.h" |
| 45 | #include "disasm.h" |
| 46 | #include "inline-frame.h" |
| 47 | #include "linespec.h" |
| 48 | #include "cli/cli-utils.h" |
| 49 | #include "objfiles.h" |
| 50 | #include "annotate.h" |
| 51 | |
| 52 | #include "symfile.h" |
| 53 | #include "extension.h" |
| 54 | #include "observable.h" |
| 55 | #include "gdbsupport/def-vector.h" |
| 56 | #include "cli/cli-option.h" |
| 57 | #include "cli/cli-style.h" |
| 58 | |
| 59 | /* The possible choices of "set print frame-arguments", and the value |
| 60 | of this setting. */ |
| 61 | |
| 62 | const char print_frame_arguments_all[] = "all"; |
| 63 | const char print_frame_arguments_scalars[] = "scalars"; |
| 64 | const char print_frame_arguments_none[] = "none"; |
| 65 | const char print_frame_arguments_presence[] = "presence"; |
| 66 | |
| 67 | static const char *const print_frame_arguments_choices[] = |
| 68 | { |
| 69 | print_frame_arguments_all, |
| 70 | print_frame_arguments_scalars, |
| 71 | print_frame_arguments_none, |
| 72 | print_frame_arguments_presence, |
| 73 | NULL |
| 74 | }; |
| 75 | |
| 76 | /* The possible choices of "set print frame-info", and the value |
| 77 | of this setting. */ |
| 78 | |
| 79 | const char print_frame_info_auto[] = "auto"; |
| 80 | const char print_frame_info_source_line[] = "source-line"; |
| 81 | const char print_frame_info_location[] = "location"; |
| 82 | const char print_frame_info_source_and_location[] = "source-and-location"; |
| 83 | const char print_frame_info_location_and_address[] = "location-and-address"; |
| 84 | const char print_frame_info_short_location[] = "short-location"; |
| 85 | |
| 86 | static const char *const print_frame_info_choices[] = |
| 87 | { |
| 88 | print_frame_info_auto, |
| 89 | print_frame_info_source_line, |
| 90 | print_frame_info_location, |
| 91 | print_frame_info_source_and_location, |
| 92 | print_frame_info_location_and_address, |
| 93 | print_frame_info_short_location, |
| 94 | NULL |
| 95 | }; |
| 96 | |
| 97 | /* print_frame_info_print_what[i] maps a choice to the corresponding |
| 98 | print_what enum. */ |
| 99 | static const gdb::optional<enum print_what> print_frame_info_print_what[] = |
| 100 | {{}, /* Empty value for "auto". */ |
| 101 | SRC_LINE, LOCATION, SRC_AND_LOC, LOC_AND_ADDRESS, SHORT_LOCATION}; |
| 102 | |
| 103 | /* The possible choices of "set print entry-values", and the value |
| 104 | of this setting. */ |
| 105 | |
| 106 | const char print_entry_values_no[] = "no"; |
| 107 | const char print_entry_values_only[] = "only"; |
| 108 | const char print_entry_values_preferred[] = "preferred"; |
| 109 | const char print_entry_values_if_needed[] = "if-needed"; |
| 110 | const char print_entry_values_both[] = "both"; |
| 111 | const char print_entry_values_compact[] = "compact"; |
| 112 | const char print_entry_values_default[] = "default"; |
| 113 | static const char *const print_entry_values_choices[] = |
| 114 | { |
| 115 | print_entry_values_no, |
| 116 | print_entry_values_only, |
| 117 | print_entry_values_preferred, |
| 118 | print_entry_values_if_needed, |
| 119 | print_entry_values_both, |
| 120 | print_entry_values_compact, |
| 121 | print_entry_values_default, |
| 122 | NULL |
| 123 | }; |
| 124 | |
| 125 | /* See frame.h. */ |
| 126 | frame_print_options user_frame_print_options; |
| 127 | |
| 128 | /* Option definitions for some frame-related "set print ..." |
| 129 | settings. */ |
| 130 | |
| 131 | using boolean_option_def |
| 132 | = gdb::option::boolean_option_def<frame_print_options>; |
| 133 | using enum_option_def |
| 134 | = gdb::option::enum_option_def<frame_print_options>; |
| 135 | |
| 136 | static const gdb::option::option_def frame_print_option_defs[] = { |
| 137 | |
| 138 | enum_option_def { |
| 139 | "entry-values", |
| 140 | print_entry_values_choices, |
| 141 | [] (frame_print_options *opt) { return &opt->print_entry_values; }, |
| 142 | NULL, /* show_cmd_cb */ |
| 143 | N_("Set printing of function arguments at function entry."), |
| 144 | N_("Show printing of function arguments at function entry."), |
| 145 | N_("GDB can sometimes determine the values of function arguments at entry,\n\ |
| 146 | in addition to their current values. This option tells GDB whether\n\ |
| 147 | to print the current value, the value at entry (marked as val@entry),\n\ |
| 148 | or both. Note that one or both of these values may be <optimized out>."), |
| 149 | }, |
| 150 | |
| 151 | enum_option_def { |
| 152 | "frame-arguments", |
| 153 | print_frame_arguments_choices, |
| 154 | [] (frame_print_options *opt) { return &opt->print_frame_arguments; }, |
| 155 | NULL, /* show_cmd_cb */ |
| 156 | N_("Set printing of non-scalar frame arguments."), |
| 157 | N_("Show printing of non-scalar frame arguments."), |
| 158 | NULL /* help_doc */ |
| 159 | }, |
| 160 | |
| 161 | boolean_option_def { |
| 162 | "raw-frame-arguments", |
| 163 | [] (frame_print_options *opt) { return &opt->print_raw_frame_arguments; }, |
| 164 | NULL, /* show_cmd_cb */ |
| 165 | N_("Set whether to print frame arguments in raw form."), |
| 166 | N_("Show whether to print frame arguments in raw form."), |
| 167 | N_("If set, frame arguments are printed in raw form, bypassing any\n\ |
| 168 | pretty-printers for that value.") |
| 169 | }, |
| 170 | |
| 171 | enum_option_def { |
| 172 | "frame-info", |
| 173 | print_frame_info_choices, |
| 174 | [] (frame_print_options *opt) { return &opt->print_frame_info; }, |
| 175 | NULL, /* show_cmd_cb */ |
| 176 | N_("Set printing of frame information."), |
| 177 | N_("Show printing of frame information."), |
| 178 | NULL /* help_doc */ |
| 179 | } |
| 180 | |
| 181 | }; |
| 182 | |
| 183 | /* Options for the "backtrace" command. */ |
| 184 | |
| 185 | struct backtrace_cmd_options |
| 186 | { |
| 187 | bool full = false; |
| 188 | bool no_filters = false; |
| 189 | bool hide = false; |
| 190 | }; |
| 191 | |
| 192 | using bt_flag_option_def |
| 193 | = gdb::option::flag_option_def<backtrace_cmd_options>; |
| 194 | |
| 195 | static const gdb::option::option_def backtrace_command_option_defs[] = { |
| 196 | bt_flag_option_def { |
| 197 | "full", |
| 198 | [] (backtrace_cmd_options *opt) { return &opt->full; }, |
| 199 | N_("Print values of local variables.") |
| 200 | }, |
| 201 | |
| 202 | bt_flag_option_def { |
| 203 | "no-filters", |
| 204 | [] (backtrace_cmd_options *opt) { return &opt->no_filters; }, |
| 205 | N_("Prohibit frame filters from executing on a backtrace."), |
| 206 | }, |
| 207 | |
| 208 | bt_flag_option_def { |
| 209 | "hide", |
| 210 | [] (backtrace_cmd_options *opt) { return &opt->hide; }, |
| 211 | N_("Causes Python frame filter elided frames to not be printed."), |
| 212 | }, |
| 213 | }; |
| 214 | |
| 215 | /* Prototypes for local functions. */ |
| 216 | |
| 217 | static void print_frame_local_vars (struct frame_info *frame, |
| 218 | bool quiet, |
| 219 | const char *regexp, const char *t_regexp, |
| 220 | int num_tabs, struct ui_file *stream); |
| 221 | |
| 222 | static void print_frame (const frame_print_options &opts, |
| 223 | frame_info *frame, int print_level, |
| 224 | enum print_what print_what, int print_args, |
| 225 | struct symtab_and_line sal); |
| 226 | |
| 227 | static struct frame_info *find_frame_for_function (const char *); |
| 228 | static struct frame_info *find_frame_for_address (CORE_ADDR); |
| 229 | |
| 230 | /* Zero means do things normally; we are interacting directly with the |
| 231 | user. One means print the full filename and linenumber when a |
| 232 | frame is printed, and do so in a format emacs18/emacs19.22 can |
| 233 | parse. Two means print similar annotations, but in many more |
| 234 | cases and in a slightly different syntax. */ |
| 235 | |
| 236 | int annotation_level = 0; |
| 237 | |
| 238 | /* Class used to manage tracking the last symtab we displayed. */ |
| 239 | |
| 240 | class last_displayed_symtab_info_type |
| 241 | { |
| 242 | public: |
| 243 | /* True if the cached information is valid. */ |
| 244 | bool is_valid () const |
| 245 | { return m_valid; } |
| 246 | |
| 247 | /* Return the cached program_space. If the cache is invalid nullptr is |
| 248 | returned. */ |
| 249 | struct program_space *pspace () const |
| 250 | { return m_pspace; } |
| 251 | |
| 252 | /* Return the cached CORE_ADDR address. If the cache is invalid 0 is |
| 253 | returned. */ |
| 254 | CORE_ADDR address () const |
| 255 | { return m_address; } |
| 256 | |
| 257 | /* Return the cached symtab. If the cache is invalid nullptr is |
| 258 | returned. */ |
| 259 | struct symtab *symtab () const |
| 260 | { return m_symtab; } |
| 261 | |
| 262 | /* Return the cached line number. If the cache is invalid 0 is |
| 263 | returned. */ |
| 264 | int line () const |
| 265 | { return m_line; } |
| 266 | |
| 267 | /* Invalidate the cache, reset all the members to their default value. */ |
| 268 | void invalidate () |
| 269 | { |
| 270 | m_valid = false; |
| 271 | m_pspace = nullptr; |
| 272 | m_address = 0; |
| 273 | m_symtab = nullptr; |
| 274 | m_line = 0; |
| 275 | } |
| 276 | |
| 277 | /* Store a new set of values in the cache. */ |
| 278 | void set (struct program_space *pspace, CORE_ADDR address, |
| 279 | struct symtab *symtab, int line) |
| 280 | { |
| 281 | gdb_assert (pspace != nullptr); |
| 282 | |
| 283 | m_valid = true; |
| 284 | m_pspace = pspace; |
| 285 | m_address = address; |
| 286 | m_symtab = symtab; |
| 287 | m_line = line; |
| 288 | } |
| 289 | |
| 290 | private: |
| 291 | /* True when the cache is valid. */ |
| 292 | bool m_valid = false; |
| 293 | |
| 294 | /* The last program space displayed. */ |
| 295 | struct program_space *m_pspace = nullptr; |
| 296 | |
| 297 | /* The last address displayed. */ |
| 298 | CORE_ADDR m_address = 0; |
| 299 | |
| 300 | /* The last symtab displayed. */ |
| 301 | struct symtab *m_symtab = nullptr; |
| 302 | |
| 303 | /* The last line number displayed. */ |
| 304 | int m_line = 0; |
| 305 | }; |
| 306 | |
| 307 | /* An actual instance of the cache, holds information about the last symtab |
| 308 | displayed. */ |
| 309 | static last_displayed_symtab_info_type last_displayed_symtab_info; |
| 310 | |
| 311 | \f |
| 312 | |
| 313 | /* See stack.h. */ |
| 314 | |
| 315 | bool |
| 316 | frame_show_address (struct frame_info *frame, |
| 317 | struct symtab_and_line sal) |
| 318 | { |
| 319 | /* If there is a line number, but no PC, then there is no location |
| 320 | information associated with this sal. The only way that should |
| 321 | happen is for the call sites of inlined functions (SAL comes from |
| 322 | find_frame_sal). Otherwise, we would have some PC range if the |
| 323 | SAL came from a line table. */ |
| 324 | if (sal.line != 0 && sal.pc == 0 && sal.end == 0) |
| 325 | { |
| 326 | if (get_next_frame (frame) == NULL) |
| 327 | gdb_assert (inline_skipped_frames (inferior_thread ()) > 0); |
| 328 | else |
| 329 | gdb_assert (get_frame_type (get_next_frame (frame)) == INLINE_FRAME); |
| 330 | return false; |
| 331 | } |
| 332 | |
| 333 | return get_frame_pc (frame) != sal.pc || !sal.is_stmt; |
| 334 | } |
| 335 | |
| 336 | /* See frame.h. */ |
| 337 | |
| 338 | void |
| 339 | print_stack_frame_to_uiout (struct ui_out *uiout, struct frame_info *frame, |
| 340 | int print_level, enum print_what print_what, |
| 341 | int set_current_sal) |
| 342 | { |
| 343 | scoped_restore save_uiout = make_scoped_restore (¤t_uiout, uiout); |
| 344 | |
| 345 | print_stack_frame (frame, print_level, print_what, set_current_sal); |
| 346 | } |
| 347 | |
| 348 | /* Show or print a stack frame FRAME briefly. The output is formatted |
| 349 | according to PRINT_LEVEL and PRINT_WHAT printing the frame's |
| 350 | relative level, function name, argument list, and file name and |
| 351 | line number. If the frame's PC is not at the beginning of the |
| 352 | source line, the actual PC is printed at the beginning. */ |
| 353 | |
| 354 | void |
| 355 | print_stack_frame (struct frame_info *frame, int print_level, |
| 356 | enum print_what print_what, |
| 357 | int set_current_sal) |
| 358 | { |
| 359 | |
| 360 | /* For mi, always print location and address. */ |
| 361 | if (current_uiout->is_mi_like_p ()) |
| 362 | print_what = LOC_AND_ADDRESS; |
| 363 | |
| 364 | try |
| 365 | { |
| 366 | print_frame_info (user_frame_print_options, |
| 367 | frame, print_level, print_what, 1 /* print_args */, |
| 368 | set_current_sal); |
| 369 | if (set_current_sal) |
| 370 | set_current_sal_from_frame (frame); |
| 371 | } |
| 372 | catch (const gdb_exception_error &e) |
| 373 | { |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | /* Print nameless arguments of frame FRAME on STREAM, where START is |
| 378 | the offset of the first nameless argument, and NUM is the number of |
| 379 | nameless arguments to print. FIRST is nonzero if this is the first |
| 380 | argument (not just the first nameless argument). */ |
| 381 | |
| 382 | static void |
| 383 | print_frame_nameless_args (struct frame_info *frame, long start, int num, |
| 384 | int first, struct ui_file *stream) |
| 385 | { |
| 386 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 387 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 388 | int i; |
| 389 | CORE_ADDR argsaddr; |
| 390 | long arg_value; |
| 391 | |
| 392 | for (i = 0; i < num; i++) |
| 393 | { |
| 394 | QUIT; |
| 395 | argsaddr = get_frame_args_address (frame); |
| 396 | if (!argsaddr) |
| 397 | return; |
| 398 | arg_value = read_memory_integer (argsaddr + start, |
| 399 | sizeof (int), byte_order); |
| 400 | if (!first) |
| 401 | fprintf_filtered (stream, ", "); |
| 402 | fprintf_filtered (stream, "%ld", arg_value); |
| 403 | first = 0; |
| 404 | start += sizeof (int); |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | /* Print single argument of inferior function. ARG must be already |
| 409 | read in. |
| 410 | |
| 411 | Errors are printed as if they would be the parameter value. Use zeroed ARG |
| 412 | iff it should not be printed according to user settings. */ |
| 413 | |
| 414 | static void |
| 415 | print_frame_arg (const frame_print_options &fp_opts, |
| 416 | const struct frame_arg *arg) |
| 417 | { |
| 418 | struct ui_out *uiout = current_uiout; |
| 419 | |
| 420 | string_file stb; |
| 421 | |
| 422 | gdb_assert (!arg->val || !arg->error); |
| 423 | gdb_assert (arg->entry_kind == print_entry_values_no |
| 424 | || arg->entry_kind == print_entry_values_only |
| 425 | || (!uiout->is_mi_like_p () |
| 426 | && arg->entry_kind == print_entry_values_compact)); |
| 427 | |
| 428 | annotate_arg_emitter arg_emitter; |
| 429 | ui_out_emit_tuple tuple_emitter (uiout, NULL); |
| 430 | fprintf_symbol_filtered (&stb, arg->sym->print_name (), |
| 431 | arg->sym->language (), DMGL_PARAMS | DMGL_ANSI); |
| 432 | if (arg->entry_kind == print_entry_values_compact) |
| 433 | { |
| 434 | /* It is OK to provide invalid MI-like stream as with |
| 435 | PRINT_ENTRY_VALUE_COMPACT we never use MI. */ |
| 436 | stb.puts ("="); |
| 437 | |
| 438 | fprintf_symbol_filtered (&stb, arg->sym->print_name (), |
| 439 | arg->sym->language (), |
| 440 | DMGL_PARAMS | DMGL_ANSI); |
| 441 | } |
| 442 | if (arg->entry_kind == print_entry_values_only |
| 443 | || arg->entry_kind == print_entry_values_compact) |
| 444 | stb.puts ("@entry"); |
| 445 | uiout->field_stream ("name", stb, variable_name_style.style ()); |
| 446 | annotate_arg_name_end (); |
| 447 | uiout->text ("="); |
| 448 | |
| 449 | ui_file_style style; |
| 450 | if (!arg->val && !arg->error) |
| 451 | uiout->text ("..."); |
| 452 | else |
| 453 | { |
| 454 | if (arg->error) |
| 455 | { |
| 456 | stb.printf (_("<error reading variable: %s>"), arg->error.get ()); |
| 457 | style = metadata_style.style (); |
| 458 | } |
| 459 | else |
| 460 | { |
| 461 | try |
| 462 | { |
| 463 | const struct language_defn *language; |
| 464 | struct value_print_options vp_opts; |
| 465 | |
| 466 | /* Avoid value_print because it will deref ref parameters. We |
| 467 | just want to print their addresses. Print ??? for args whose |
| 468 | address we do not know. We pass 2 as "recurse" to val_print |
| 469 | because our standard indentation here is 4 spaces, and |
| 470 | val_print indents 2 for each recurse. */ |
| 471 | |
| 472 | annotate_arg_value (value_type (arg->val)); |
| 473 | |
| 474 | /* Use the appropriate language to display our symbol, unless the |
| 475 | user forced the language to a specific language. */ |
| 476 | if (language_mode == language_mode_auto) |
| 477 | language = language_def (arg->sym->language ()); |
| 478 | else |
| 479 | language = current_language; |
| 480 | |
| 481 | get_no_prettyformat_print_options (&vp_opts); |
| 482 | vp_opts.deref_ref = 1; |
| 483 | vp_opts.raw = fp_opts.print_raw_frame_arguments; |
| 484 | |
| 485 | /* True in "summary" mode, false otherwise. */ |
| 486 | vp_opts.summary |
| 487 | = fp_opts.print_frame_arguments == print_frame_arguments_scalars; |
| 488 | |
| 489 | common_val_print_checked (arg->val, &stb, 2, &vp_opts, language); |
| 490 | } |
| 491 | catch (const gdb_exception_error &except) |
| 492 | { |
| 493 | stb.printf (_("<error reading variable: %s>"), |
| 494 | except.what ()); |
| 495 | style = metadata_style.style (); |
| 496 | } |
| 497 | } |
| 498 | } |
| 499 | |
| 500 | uiout->field_stream ("value", stb, style); |
| 501 | } |
| 502 | |
| 503 | /* Read in inferior function local SYM at FRAME into ARGP. Caller is |
| 504 | responsible for xfree of ARGP->ERROR. This function never throws an |
| 505 | exception. */ |
| 506 | |
| 507 | void |
| 508 | read_frame_local (struct symbol *sym, struct frame_info *frame, |
| 509 | struct frame_arg *argp) |
| 510 | { |
| 511 | argp->sym = sym; |
| 512 | argp->val = NULL; |
| 513 | argp->error = NULL; |
| 514 | |
| 515 | try |
| 516 | { |
| 517 | argp->val = read_var_value (sym, NULL, frame); |
| 518 | } |
| 519 | catch (const gdb_exception_error &except) |
| 520 | { |
| 521 | argp->error.reset (xstrdup (except.what ())); |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | /* Read in inferior function parameter SYM at FRAME into ARGP. This |
| 526 | function never throws an exception. */ |
| 527 | |
| 528 | void |
| 529 | read_frame_arg (const frame_print_options &fp_opts, |
| 530 | symbol *sym, frame_info *frame, |
| 531 | struct frame_arg *argp, struct frame_arg *entryargp) |
| 532 | { |
| 533 | struct value *val = NULL, *entryval = NULL; |
| 534 | char *val_error = NULL, *entryval_error = NULL; |
| 535 | int val_equal = 0; |
| 536 | |
| 537 | if (fp_opts.print_entry_values != print_entry_values_only |
| 538 | && fp_opts.print_entry_values != print_entry_values_preferred) |
| 539 | { |
| 540 | try |
| 541 | { |
| 542 | val = read_var_value (sym, NULL, frame); |
| 543 | } |
| 544 | catch (const gdb_exception_error &except) |
| 545 | { |
| 546 | val_error = (char *) alloca (except.message->size () + 1); |
| 547 | strcpy (val_error, except.what ()); |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | if (SYMBOL_COMPUTED_OPS (sym) != NULL |
| 552 | && SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry != NULL |
| 553 | && fp_opts.print_entry_values != print_entry_values_no |
| 554 | && (fp_opts.print_entry_values != print_entry_values_if_needed |
| 555 | || !val || value_optimized_out (val))) |
| 556 | { |
| 557 | try |
| 558 | { |
| 559 | const struct symbol_computed_ops *ops; |
| 560 | |
| 561 | ops = SYMBOL_COMPUTED_OPS (sym); |
| 562 | entryval = ops->read_variable_at_entry (sym, frame); |
| 563 | } |
| 564 | catch (const gdb_exception_error &except) |
| 565 | { |
| 566 | if (except.error != NO_ENTRY_VALUE_ERROR) |
| 567 | { |
| 568 | entryval_error = (char *) alloca (except.message->size () + 1); |
| 569 | strcpy (entryval_error, except.what ()); |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | if (entryval != NULL && value_optimized_out (entryval)) |
| 574 | entryval = NULL; |
| 575 | |
| 576 | if (fp_opts.print_entry_values == print_entry_values_compact |
| 577 | || fp_opts.print_entry_values == print_entry_values_default) |
| 578 | { |
| 579 | /* For MI do not try to use print_entry_values_compact for ARGP. */ |
| 580 | |
| 581 | if (val && entryval && !current_uiout->is_mi_like_p ()) |
| 582 | { |
| 583 | struct type *type = value_type (val); |
| 584 | |
| 585 | if (value_lazy (val)) |
| 586 | value_fetch_lazy (val); |
| 587 | if (value_lazy (entryval)) |
| 588 | value_fetch_lazy (entryval); |
| 589 | |
| 590 | if (value_contents_eq (val, 0, entryval, 0, TYPE_LENGTH (type))) |
| 591 | { |
| 592 | /* Initialize it just to avoid a GCC false warning. */ |
| 593 | struct value *val_deref = NULL, *entryval_deref; |
| 594 | |
| 595 | /* DW_AT_call_value does match with the current |
| 596 | value. If it is a reference still try to verify if |
| 597 | dereferenced DW_AT_call_data_value does not differ. */ |
| 598 | |
| 599 | try |
| 600 | { |
| 601 | struct type *type_deref; |
| 602 | |
| 603 | val_deref = coerce_ref (val); |
| 604 | if (value_lazy (val_deref)) |
| 605 | value_fetch_lazy (val_deref); |
| 606 | type_deref = value_type (val_deref); |
| 607 | |
| 608 | entryval_deref = coerce_ref (entryval); |
| 609 | if (value_lazy (entryval_deref)) |
| 610 | value_fetch_lazy (entryval_deref); |
| 611 | |
| 612 | /* If the reference addresses match but dereferenced |
| 613 | content does not match print them. */ |
| 614 | if (val != val_deref |
| 615 | && value_contents_eq (val_deref, 0, |
| 616 | entryval_deref, 0, |
| 617 | TYPE_LENGTH (type_deref))) |
| 618 | val_equal = 1; |
| 619 | } |
| 620 | catch (const gdb_exception_error &except) |
| 621 | { |
| 622 | /* If the dereferenced content could not be |
| 623 | fetched do not display anything. */ |
| 624 | if (except.error == NO_ENTRY_VALUE_ERROR) |
| 625 | val_equal = 1; |
| 626 | else if (except.message != NULL) |
| 627 | { |
| 628 | entryval_error |
| 629 | = (char *) alloca (except.message->size () + 1); |
| 630 | strcpy (entryval_error, except.what ()); |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | /* Value was not a reference; and its content matches. */ |
| 635 | if (val == val_deref) |
| 636 | val_equal = 1; |
| 637 | |
| 638 | if (val_equal) |
| 639 | entryval = NULL; |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | /* Try to remove possibly duplicate error message for ENTRYARGP even |
| 644 | in MI mode. */ |
| 645 | |
| 646 | if (val_error && entryval_error |
| 647 | && strcmp (val_error, entryval_error) == 0) |
| 648 | { |
| 649 | entryval_error = NULL; |
| 650 | |
| 651 | /* Do not se VAL_EQUAL as the same error message may be shown for |
| 652 | the entry value even if no entry values are present in the |
| 653 | inferior. */ |
| 654 | } |
| 655 | } |
| 656 | } |
| 657 | |
| 658 | if (entryval == NULL) |
| 659 | { |
| 660 | if (fp_opts.print_entry_values == print_entry_values_preferred) |
| 661 | { |
| 662 | gdb_assert (val == NULL); |
| 663 | |
| 664 | try |
| 665 | { |
| 666 | val = read_var_value (sym, NULL, frame); |
| 667 | } |
| 668 | catch (const gdb_exception_error &except) |
| 669 | { |
| 670 | val_error = (char *) alloca (except.message->size () + 1); |
| 671 | strcpy (val_error, except.what ()); |
| 672 | } |
| 673 | } |
| 674 | if (fp_opts.print_entry_values == print_entry_values_only |
| 675 | || fp_opts.print_entry_values == print_entry_values_both |
| 676 | || (fp_opts.print_entry_values == print_entry_values_preferred |
| 677 | && (!val || value_optimized_out (val)))) |
| 678 | { |
| 679 | entryval = allocate_optimized_out_value (SYMBOL_TYPE (sym)); |
| 680 | entryval_error = NULL; |
| 681 | } |
| 682 | } |
| 683 | if ((fp_opts.print_entry_values == print_entry_values_compact |
| 684 | || fp_opts.print_entry_values == print_entry_values_if_needed |
| 685 | || fp_opts.print_entry_values == print_entry_values_preferred) |
| 686 | && (!val || value_optimized_out (val)) && entryval != NULL) |
| 687 | { |
| 688 | val = NULL; |
| 689 | val_error = NULL; |
| 690 | } |
| 691 | |
| 692 | argp->sym = sym; |
| 693 | argp->val = val; |
| 694 | argp->error.reset (val_error ? xstrdup (val_error) : NULL); |
| 695 | if (!val && !val_error) |
| 696 | argp->entry_kind = print_entry_values_only; |
| 697 | else if ((fp_opts.print_entry_values == print_entry_values_compact |
| 698 | || fp_opts.print_entry_values == print_entry_values_default) |
| 699 | && val_equal) |
| 700 | { |
| 701 | argp->entry_kind = print_entry_values_compact; |
| 702 | gdb_assert (!current_uiout->is_mi_like_p ()); |
| 703 | } |
| 704 | else |
| 705 | argp->entry_kind = print_entry_values_no; |
| 706 | |
| 707 | entryargp->sym = sym; |
| 708 | entryargp->val = entryval; |
| 709 | entryargp->error.reset (entryval_error ? xstrdup (entryval_error) : NULL); |
| 710 | if (!entryval && !entryval_error) |
| 711 | entryargp->entry_kind = print_entry_values_no; |
| 712 | else |
| 713 | entryargp->entry_kind = print_entry_values_only; |
| 714 | } |
| 715 | |
| 716 | /* Print the arguments of frame FRAME on STREAM, given the function |
| 717 | FUNC running in that frame (as a symbol), where NUM is the number |
| 718 | of arguments according to the stack frame (or -1 if the number of |
| 719 | arguments is unknown). */ |
| 720 | |
| 721 | /* Note that currently the "number of arguments according to the |
| 722 | stack frame" is only known on VAX where i refers to the "number of |
| 723 | ints of arguments according to the stack frame". */ |
| 724 | |
| 725 | static void |
| 726 | print_frame_args (const frame_print_options &fp_opts, |
| 727 | struct symbol *func, struct frame_info *frame, |
| 728 | int num, struct ui_file *stream) |
| 729 | { |
| 730 | struct ui_out *uiout = current_uiout; |
| 731 | int first = 1; |
| 732 | /* Offset of next stack argument beyond the one we have seen that is |
| 733 | at the highest offset, or -1 if we haven't come to a stack |
| 734 | argument yet. */ |
| 735 | long highest_offset = -1; |
| 736 | /* Number of ints of arguments that we have printed so far. */ |
| 737 | int args_printed = 0; |
| 738 | /* True if we should print arg names. If false, we only indicate |
| 739 | the presence of arguments by printing ellipsis. */ |
| 740 | bool print_names |
| 741 | = fp_opts.print_frame_arguments != print_frame_arguments_presence; |
| 742 | /* True if we should print arguments, false otherwise. */ |
| 743 | bool print_args |
| 744 | = (print_names |
| 745 | && fp_opts.print_frame_arguments != print_frame_arguments_none); |
| 746 | |
| 747 | if (func) |
| 748 | { |
| 749 | const struct block *b = SYMBOL_BLOCK_VALUE (func); |
| 750 | struct block_iterator iter; |
| 751 | struct symbol *sym; |
| 752 | |
| 753 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 754 | { |
| 755 | struct frame_arg arg, entryarg; |
| 756 | |
| 757 | QUIT; |
| 758 | |
| 759 | /* Keep track of the highest stack argument offset seen, and |
| 760 | skip over any kinds of symbols we don't care about. */ |
| 761 | |
| 762 | if (!SYMBOL_IS_ARGUMENT (sym)) |
| 763 | continue; |
| 764 | |
| 765 | if (!print_names) |
| 766 | { |
| 767 | uiout->text ("..."); |
| 768 | first = 0; |
| 769 | break; |
| 770 | } |
| 771 | |
| 772 | switch (SYMBOL_CLASS (sym)) |
| 773 | { |
| 774 | case LOC_ARG: |
| 775 | case LOC_REF_ARG: |
| 776 | { |
| 777 | long current_offset = SYMBOL_VALUE (sym); |
| 778 | int arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym)); |
| 779 | |
| 780 | /* Compute address of next argument by adding the size of |
| 781 | this argument and rounding to an int boundary. */ |
| 782 | current_offset = |
| 783 | ((current_offset + arg_size + sizeof (int) - 1) |
| 784 | & ~(sizeof (int) - 1)); |
| 785 | |
| 786 | /* If this is the highest offset seen yet, set |
| 787 | highest_offset. */ |
| 788 | if (highest_offset == -1 |
| 789 | || (current_offset > highest_offset)) |
| 790 | highest_offset = current_offset; |
| 791 | |
| 792 | /* Add the number of ints we're about to print to |
| 793 | args_printed. */ |
| 794 | args_printed += (arg_size + sizeof (int) - 1) / sizeof (int); |
| 795 | } |
| 796 | |
| 797 | /* We care about types of symbols, but don't need to |
| 798 | keep track of stack offsets in them. */ |
| 799 | case LOC_REGISTER: |
| 800 | case LOC_REGPARM_ADDR: |
| 801 | case LOC_COMPUTED: |
| 802 | case LOC_OPTIMIZED_OUT: |
| 803 | default: |
| 804 | break; |
| 805 | } |
| 806 | |
| 807 | /* We have to look up the symbol because arguments can have |
| 808 | two entries (one a parameter, one a local) and the one we |
| 809 | want is the local, which lookup_symbol will find for us. |
| 810 | This includes gcc1 (not gcc2) on SPARC when passing a |
| 811 | small structure and gcc2 when the argument type is float |
| 812 | and it is passed as a double and converted to float by |
| 813 | the prologue (in the latter case the type of the LOC_ARG |
| 814 | symbol is double and the type of the LOC_LOCAL symbol is |
| 815 | float). */ |
| 816 | /* But if the parameter name is null, don't try it. Null |
| 817 | parameter names occur on the RS/6000, for traceback |
| 818 | tables. FIXME, should we even print them? */ |
| 819 | |
| 820 | if (*sym->linkage_name ()) |
| 821 | { |
| 822 | struct symbol *nsym; |
| 823 | |
| 824 | nsym = lookup_symbol_search_name (sym->search_name (), |
| 825 | b, VAR_DOMAIN).symbol; |
| 826 | gdb_assert (nsym != NULL); |
| 827 | if (SYMBOL_CLASS (nsym) == LOC_REGISTER |
| 828 | && !SYMBOL_IS_ARGUMENT (nsym)) |
| 829 | { |
| 830 | /* There is a LOC_ARG/LOC_REGISTER pair. This means |
| 831 | that it was passed on the stack and loaded into a |
| 832 | register, or passed in a register and stored in a |
| 833 | stack slot. GDB 3.x used the LOC_ARG; GDB |
| 834 | 4.0-4.11 used the LOC_REGISTER. |
| 835 | |
| 836 | Reasons for using the LOC_ARG: |
| 837 | |
| 838 | (1) Because find_saved_registers may be slow for |
| 839 | remote debugging. |
| 840 | |
| 841 | (2) Because registers are often re-used and stack |
| 842 | slots rarely (never?) are. Therefore using |
| 843 | the stack slot is much less likely to print |
| 844 | garbage. |
| 845 | |
| 846 | Reasons why we might want to use the LOC_REGISTER: |
| 847 | |
| 848 | (1) So that the backtrace prints the same value |
| 849 | as "print foo". I see no compelling reason |
| 850 | why this needs to be the case; having the |
| 851 | backtrace print the value which was passed |
| 852 | in, and "print foo" print the value as |
| 853 | modified within the called function, makes |
| 854 | perfect sense to me. |
| 855 | |
| 856 | Additional note: It might be nice if "info args" |
| 857 | displayed both values. |
| 858 | |
| 859 | One more note: There is a case with SPARC |
| 860 | structure passing where we need to use the |
| 861 | LOC_REGISTER, but this is dealt with by creating |
| 862 | a single LOC_REGPARM in symbol reading. */ |
| 863 | |
| 864 | /* Leave sym (the LOC_ARG) alone. */ |
| 865 | ; |
| 866 | } |
| 867 | else |
| 868 | sym = nsym; |
| 869 | } |
| 870 | |
| 871 | /* Print the current arg. */ |
| 872 | if (!first) |
| 873 | uiout->text (", "); |
| 874 | uiout->wrap_hint (" "); |
| 875 | |
| 876 | if (!print_args) |
| 877 | { |
| 878 | arg.sym = sym; |
| 879 | arg.entry_kind = print_entry_values_no; |
| 880 | entryarg.sym = sym; |
| 881 | entryarg.entry_kind = print_entry_values_no; |
| 882 | } |
| 883 | else |
| 884 | read_frame_arg (fp_opts, sym, frame, &arg, &entryarg); |
| 885 | |
| 886 | if (arg.entry_kind != print_entry_values_only) |
| 887 | print_frame_arg (fp_opts, &arg); |
| 888 | |
| 889 | if (entryarg.entry_kind != print_entry_values_no) |
| 890 | { |
| 891 | if (arg.entry_kind != print_entry_values_only) |
| 892 | { |
| 893 | uiout->text (", "); |
| 894 | uiout->wrap_hint (" "); |
| 895 | } |
| 896 | |
| 897 | print_frame_arg (fp_opts, &entryarg); |
| 898 | } |
| 899 | |
| 900 | first = 0; |
| 901 | } |
| 902 | } |
| 903 | |
| 904 | /* Don't print nameless args in situations where we don't know |
| 905 | enough about the stack to find them. */ |
| 906 | if (num != -1) |
| 907 | { |
| 908 | long start; |
| 909 | |
| 910 | if (highest_offset == -1) |
| 911 | start = gdbarch_frame_args_skip (get_frame_arch (frame)); |
| 912 | else |
| 913 | start = highest_offset; |
| 914 | |
| 915 | if (!print_names && !first && num > 0) |
| 916 | uiout->text ("..."); |
| 917 | else |
| 918 | print_frame_nameless_args (frame, start, num - args_printed, |
| 919 | first, stream); |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | /* Set the current source and line to the location given by frame |
| 924 | FRAME, if possible. When CENTER is true, adjust so the relevant |
| 925 | line is in the center of the next 'list'. */ |
| 926 | |
| 927 | void |
| 928 | set_current_sal_from_frame (struct frame_info *frame) |
| 929 | { |
| 930 | symtab_and_line sal = find_frame_sal (frame); |
| 931 | if (sal.symtab != NULL) |
| 932 | set_current_source_symtab_and_line (sal); |
| 933 | } |
| 934 | |
| 935 | /* If ON, GDB will display disassembly of the next source line when |
| 936 | execution of the program being debugged stops. |
| 937 | If AUTO (which is the default), or there's no line info to determine |
| 938 | the source line of the next instruction, display disassembly of next |
| 939 | instruction instead. */ |
| 940 | |
| 941 | static enum auto_boolean disassemble_next_line; |
| 942 | |
| 943 | static void |
| 944 | show_disassemble_next_line (struct ui_file *file, int from_tty, |
| 945 | struct cmd_list_element *c, |
| 946 | const char *value) |
| 947 | { |
| 948 | fprintf_filtered (file, |
| 949 | _("Debugger's willingness to use " |
| 950 | "disassemble-next-line is %s.\n"), |
| 951 | value); |
| 952 | } |
| 953 | |
| 954 | /* Use TRY_CATCH to catch the exception from the gdb_disassembly |
| 955 | because it will be broken by filter sometime. */ |
| 956 | |
| 957 | static void |
| 958 | do_gdb_disassembly (struct gdbarch *gdbarch, |
| 959 | int how_many, CORE_ADDR low, CORE_ADDR high) |
| 960 | { |
| 961 | |
| 962 | try |
| 963 | { |
| 964 | gdb_disassembly (gdbarch, current_uiout, |
| 965 | DISASSEMBLY_RAW_INSN, how_many, |
| 966 | low, high); |
| 967 | } |
| 968 | catch (const gdb_exception_error &exception) |
| 969 | { |
| 970 | /* If an exception was thrown while doing the disassembly, print |
| 971 | the error message, to give the user a clue of what happened. */ |
| 972 | exception_print (gdb_stderr, exception); |
| 973 | } |
| 974 | } |
| 975 | |
| 976 | /* Converts the PRINT_FRAME_INFO choice to an optional enum print_what. |
| 977 | Value not present indicates to the caller to use default values |
| 978 | specific to the command being executed. */ |
| 979 | |
| 980 | static gdb::optional<enum print_what> |
| 981 | print_frame_info_to_print_what (const char *print_frame_info) |
| 982 | { |
| 983 | for (int i = 0; print_frame_info_choices[i] != NULL; i++) |
| 984 | if (print_frame_info == print_frame_info_choices[i]) |
| 985 | return print_frame_info_print_what[i]; |
| 986 | |
| 987 | internal_error (__FILE__, __LINE__, |
| 988 | "Unexpected print frame-info value `%s'.", |
| 989 | print_frame_info); |
| 990 | } |
| 991 | |
| 992 | /* Print the PC from FRAME, plus any flags, to UIOUT. */ |
| 993 | |
| 994 | static void |
| 995 | print_pc (struct ui_out *uiout, struct gdbarch *gdbarch, frame_info *frame, |
| 996 | CORE_ADDR pc) |
| 997 | { |
| 998 | uiout->field_core_addr ("addr", gdbarch, pc); |
| 999 | |
| 1000 | std::string flags = gdbarch_get_pc_address_flags (gdbarch, frame, pc); |
| 1001 | if (!flags.empty ()) |
| 1002 | { |
| 1003 | uiout->text (" ["); |
| 1004 | uiout->field_string ("addr_flags", flags); |
| 1005 | uiout->text ("]"); |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | /* See stack.h. */ |
| 1010 | |
| 1011 | void |
| 1012 | get_user_print_what_frame_info (gdb::optional<enum print_what> *what) |
| 1013 | { |
| 1014 | *what |
| 1015 | = print_frame_info_to_print_what |
| 1016 | (user_frame_print_options.print_frame_info); |
| 1017 | } |
| 1018 | |
| 1019 | /* Print information about frame FRAME. The output is format according |
| 1020 | to PRINT_LEVEL and PRINT_WHAT and PRINT_ARGS. For the meaning of |
| 1021 | PRINT_WHAT, see enum print_what comments in frame.h. |
| 1022 | Note that PRINT_WHAT is overridden if FP_OPTS.print_frame_info |
| 1023 | != print_frame_info_auto. |
| 1024 | |
| 1025 | Used in "where" output, and to emit breakpoint or step |
| 1026 | messages. */ |
| 1027 | |
| 1028 | void |
| 1029 | print_frame_info (const frame_print_options &fp_opts, |
| 1030 | frame_info *frame, int print_level, |
| 1031 | enum print_what print_what, int print_args, |
| 1032 | int set_current_sal) |
| 1033 | { |
| 1034 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 1035 | int source_print; |
| 1036 | int location_print; |
| 1037 | struct ui_out *uiout = current_uiout; |
| 1038 | |
| 1039 | if (!current_uiout->is_mi_like_p () |
| 1040 | && fp_opts.print_frame_info != print_frame_info_auto) |
| 1041 | { |
| 1042 | /* Use the specific frame information desired by the user. */ |
| 1043 | print_what = *print_frame_info_to_print_what (fp_opts.print_frame_info); |
| 1044 | } |
| 1045 | |
| 1046 | if (get_frame_type (frame) == DUMMY_FRAME |
| 1047 | || get_frame_type (frame) == SIGTRAMP_FRAME |
| 1048 | || get_frame_type (frame) == ARCH_FRAME) |
| 1049 | { |
| 1050 | ui_out_emit_tuple tuple_emitter (uiout, "frame"); |
| 1051 | |
| 1052 | annotate_frame_begin (print_level ? frame_relative_level (frame) : 0, |
| 1053 | gdbarch, get_frame_pc (frame)); |
| 1054 | |
| 1055 | /* Do this regardless of SOURCE because we don't have any source |
| 1056 | to list for this frame. */ |
| 1057 | if (print_level) |
| 1058 | { |
| 1059 | uiout->text ("#"); |
| 1060 | uiout->field_fmt_signed (2, ui_left, "level", |
| 1061 | frame_relative_level (frame)); |
| 1062 | } |
| 1063 | if (uiout->is_mi_like_p ()) |
| 1064 | { |
| 1065 | annotate_frame_address (); |
| 1066 | print_pc (uiout, gdbarch, frame, get_frame_pc (frame)); |
| 1067 | annotate_frame_address_end (); |
| 1068 | } |
| 1069 | |
| 1070 | if (get_frame_type (frame) == DUMMY_FRAME) |
| 1071 | { |
| 1072 | annotate_function_call (); |
| 1073 | uiout->field_string ("func", "<function called from gdb>", |
| 1074 | metadata_style.style ()); |
| 1075 | } |
| 1076 | else if (get_frame_type (frame) == SIGTRAMP_FRAME) |
| 1077 | { |
| 1078 | annotate_signal_handler_caller (); |
| 1079 | uiout->field_string ("func", "<signal handler called>", |
| 1080 | metadata_style.style ()); |
| 1081 | } |
| 1082 | else if (get_frame_type (frame) == ARCH_FRAME) |
| 1083 | { |
| 1084 | uiout->field_string ("func", "<cross-architecture call>", |
| 1085 | metadata_style.style ()); |
| 1086 | } |
| 1087 | uiout->text ("\n"); |
| 1088 | annotate_frame_end (); |
| 1089 | |
| 1090 | /* If disassemble-next-line is set to auto or on output the next |
| 1091 | instruction. */ |
| 1092 | if (disassemble_next_line == AUTO_BOOLEAN_AUTO |
| 1093 | || disassemble_next_line == AUTO_BOOLEAN_TRUE) |
| 1094 | do_gdb_disassembly (get_frame_arch (frame), 1, |
| 1095 | get_frame_pc (frame), get_frame_pc (frame) + 1); |
| 1096 | |
| 1097 | return; |
| 1098 | } |
| 1099 | |
| 1100 | /* If FRAME is not the innermost frame, that normally means that |
| 1101 | FRAME->pc points to *after* the call instruction, and we want to |
| 1102 | get the line containing the call, never the next line. But if |
| 1103 | the next frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the |
| 1104 | next frame was not entered as the result of a call, and we want |
| 1105 | to get the line containing FRAME->pc. */ |
| 1106 | symtab_and_line sal = find_frame_sal (frame); |
| 1107 | |
| 1108 | location_print = (print_what == LOCATION |
| 1109 | || print_what == SRC_AND_LOC |
| 1110 | || print_what == LOC_AND_ADDRESS |
| 1111 | || print_what == SHORT_LOCATION); |
| 1112 | if (location_print || !sal.symtab) |
| 1113 | print_frame (fp_opts, frame, print_level, print_what, print_args, sal); |
| 1114 | |
| 1115 | source_print = (print_what == SRC_LINE || print_what == SRC_AND_LOC); |
| 1116 | |
| 1117 | /* If disassemble-next-line is set to auto or on and doesn't have |
| 1118 | the line debug messages for $pc, output the next instruction. */ |
| 1119 | if ((disassemble_next_line == AUTO_BOOLEAN_AUTO |
| 1120 | || disassemble_next_line == AUTO_BOOLEAN_TRUE) |
| 1121 | && source_print && !sal.symtab) |
| 1122 | do_gdb_disassembly (get_frame_arch (frame), 1, |
| 1123 | get_frame_pc (frame), get_frame_pc (frame) + 1); |
| 1124 | |
| 1125 | if (source_print && sal.symtab) |
| 1126 | { |
| 1127 | int mid_statement = ((print_what == SRC_LINE) |
| 1128 | && frame_show_address (frame, sal)); |
| 1129 | if (annotation_level > 0 |
| 1130 | && annotate_source_line (sal.symtab, sal.line, mid_statement, |
| 1131 | get_frame_pc (frame))) |
| 1132 | { |
| 1133 | /* The call to ANNOTATE_SOURCE_LINE already printed the |
| 1134 | annotation for this source line, so we avoid the two cases |
| 1135 | below and do not print the actual source line. The |
| 1136 | documentation for annotations makes it clear that the source |
| 1137 | line annotation is printed __instead__ of printing the source |
| 1138 | line, not as well as. |
| 1139 | |
| 1140 | However, if we fail to print the source line, which usually |
| 1141 | means either the source file is missing, or the requested |
| 1142 | line is out of range of the file, then we don't print the |
| 1143 | source annotation, and will pass through the "normal" print |
| 1144 | source line code below, the expectation is that this code |
| 1145 | will print an appropriate error. */ |
| 1146 | } |
| 1147 | else if (deprecated_print_frame_info_listing_hook) |
| 1148 | deprecated_print_frame_info_listing_hook (sal.symtab, sal.line, |
| 1149 | sal.line + 1, 0); |
| 1150 | else |
| 1151 | { |
| 1152 | struct value_print_options opts; |
| 1153 | |
| 1154 | get_user_print_options (&opts); |
| 1155 | /* We used to do this earlier, but that is clearly |
| 1156 | wrong. This function is used by many different |
| 1157 | parts of gdb, including normal_stop in infrun.c, |
| 1158 | which uses this to print out the current PC |
| 1159 | when we stepi/nexti into the middle of a source |
| 1160 | line. Only the command line really wants this |
| 1161 | behavior. Other UIs probably would like the |
| 1162 | ability to decide for themselves if it is desired. */ |
| 1163 | if (opts.addressprint && mid_statement) |
| 1164 | { |
| 1165 | print_pc (uiout, gdbarch, frame, get_frame_pc (frame)); |
| 1166 | uiout->text ("\t"); |
| 1167 | } |
| 1168 | |
| 1169 | print_source_lines (sal.symtab, sal.line, sal.line + 1, 0); |
| 1170 | } |
| 1171 | |
| 1172 | /* If disassemble-next-line is set to on and there is line debug |
| 1173 | messages, output assembly codes for next line. */ |
| 1174 | if (disassemble_next_line == AUTO_BOOLEAN_TRUE) |
| 1175 | do_gdb_disassembly (get_frame_arch (frame), -1, sal.pc, sal.end); |
| 1176 | } |
| 1177 | |
| 1178 | if (set_current_sal) |
| 1179 | { |
| 1180 | CORE_ADDR pc; |
| 1181 | |
| 1182 | if (get_frame_pc_if_available (frame, &pc)) |
| 1183 | last_displayed_symtab_info.set (sal.pspace, pc, sal.symtab, sal.line); |
| 1184 | else |
| 1185 | last_displayed_symtab_info.invalidate (); |
| 1186 | } |
| 1187 | |
| 1188 | annotate_frame_end (); |
| 1189 | |
| 1190 | gdb_flush (gdb_stdout); |
| 1191 | } |
| 1192 | |
| 1193 | /* See stack.h. */ |
| 1194 | |
| 1195 | void |
| 1196 | clear_last_displayed_sal (void) |
| 1197 | { |
| 1198 | last_displayed_symtab_info.invalidate (); |
| 1199 | } |
| 1200 | |
| 1201 | /* See stack.h. */ |
| 1202 | |
| 1203 | bool |
| 1204 | last_displayed_sal_is_valid (void) |
| 1205 | { |
| 1206 | return last_displayed_symtab_info.is_valid (); |
| 1207 | } |
| 1208 | |
| 1209 | /* See stack.h. */ |
| 1210 | |
| 1211 | struct program_space * |
| 1212 | get_last_displayed_pspace (void) |
| 1213 | { |
| 1214 | return last_displayed_symtab_info.pspace (); |
| 1215 | } |
| 1216 | |
| 1217 | /* See stack.h. */ |
| 1218 | |
| 1219 | CORE_ADDR |
| 1220 | get_last_displayed_addr (void) |
| 1221 | { |
| 1222 | return last_displayed_symtab_info.address (); |
| 1223 | } |
| 1224 | |
| 1225 | /* See stack.h. */ |
| 1226 | |
| 1227 | struct symtab* |
| 1228 | get_last_displayed_symtab (void) |
| 1229 | { |
| 1230 | return last_displayed_symtab_info.symtab (); |
| 1231 | } |
| 1232 | |
| 1233 | /* See stack.h. */ |
| 1234 | |
| 1235 | int |
| 1236 | get_last_displayed_line (void) |
| 1237 | { |
| 1238 | return last_displayed_symtab_info.line (); |
| 1239 | } |
| 1240 | |
| 1241 | /* See stack.h. */ |
| 1242 | |
| 1243 | symtab_and_line |
| 1244 | get_last_displayed_sal () |
| 1245 | { |
| 1246 | symtab_and_line sal; |
| 1247 | |
| 1248 | if (last_displayed_symtab_info.is_valid ()) |
| 1249 | { |
| 1250 | sal.pspace = last_displayed_symtab_info.pspace (); |
| 1251 | sal.pc = last_displayed_symtab_info.address (); |
| 1252 | sal.symtab = last_displayed_symtab_info.symtab (); |
| 1253 | sal.line = last_displayed_symtab_info.line (); |
| 1254 | } |
| 1255 | |
| 1256 | return sal; |
| 1257 | } |
| 1258 | |
| 1259 | |
| 1260 | /* Attempt to obtain the name, FUNLANG and optionally FUNCP of the function |
| 1261 | corresponding to FRAME. */ |
| 1262 | |
| 1263 | gdb::unique_xmalloc_ptr<char> |
| 1264 | find_frame_funname (struct frame_info *frame, enum language *funlang, |
| 1265 | struct symbol **funcp) |
| 1266 | { |
| 1267 | struct symbol *func; |
| 1268 | gdb::unique_xmalloc_ptr<char> funname; |
| 1269 | |
| 1270 | *funlang = language_unknown; |
| 1271 | if (funcp) |
| 1272 | *funcp = NULL; |
| 1273 | |
| 1274 | func = get_frame_function (frame); |
| 1275 | if (func) |
| 1276 | { |
| 1277 | const char *print_name = func->print_name (); |
| 1278 | |
| 1279 | *funlang = func->language (); |
| 1280 | if (funcp) |
| 1281 | *funcp = func; |
| 1282 | if (*funlang == language_cplus) |
| 1283 | { |
| 1284 | /* It seems appropriate to use print_name() here, |
| 1285 | to display the demangled name that we already have |
| 1286 | stored in the symbol table, but we stored a version |
| 1287 | with DMGL_PARAMS turned on, and here we don't want to |
| 1288 | display parameters. So remove the parameters. */ |
| 1289 | funname = cp_remove_params (print_name); |
| 1290 | } |
| 1291 | |
| 1292 | /* If we didn't hit the C++ case above, set *funname |
| 1293 | here. */ |
| 1294 | if (funname == NULL) |
| 1295 | funname.reset (xstrdup (print_name)); |
| 1296 | } |
| 1297 | else |
| 1298 | { |
| 1299 | struct bound_minimal_symbol msymbol; |
| 1300 | CORE_ADDR pc; |
| 1301 | |
| 1302 | if (!get_frame_address_in_block_if_available (frame, &pc)) |
| 1303 | return funname; |
| 1304 | |
| 1305 | msymbol = lookup_minimal_symbol_by_pc (pc); |
| 1306 | if (msymbol.minsym != NULL) |
| 1307 | { |
| 1308 | funname.reset (xstrdup (msymbol.minsym->print_name ())); |
| 1309 | *funlang = msymbol.minsym->language (); |
| 1310 | } |
| 1311 | } |
| 1312 | |
| 1313 | return funname; |
| 1314 | } |
| 1315 | |
| 1316 | static void |
| 1317 | print_frame (const frame_print_options &fp_opts, |
| 1318 | frame_info *frame, int print_level, |
| 1319 | enum print_what print_what, int print_args, |
| 1320 | struct symtab_and_line sal) |
| 1321 | { |
| 1322 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 1323 | struct ui_out *uiout = current_uiout; |
| 1324 | enum language funlang = language_unknown; |
| 1325 | struct value_print_options opts; |
| 1326 | struct symbol *func; |
| 1327 | CORE_ADDR pc = 0; |
| 1328 | int pc_p; |
| 1329 | |
| 1330 | pc_p = get_frame_pc_if_available (frame, &pc); |
| 1331 | |
| 1332 | gdb::unique_xmalloc_ptr<char> funname |
| 1333 | = find_frame_funname (frame, &funlang, &func); |
| 1334 | |
| 1335 | annotate_frame_begin (print_level ? frame_relative_level (frame) : 0, |
| 1336 | gdbarch, pc); |
| 1337 | |
| 1338 | { |
| 1339 | ui_out_emit_tuple tuple_emitter (uiout, "frame"); |
| 1340 | |
| 1341 | if (print_level) |
| 1342 | { |
| 1343 | uiout->text ("#"); |
| 1344 | uiout->field_fmt_signed (2, ui_left, "level", |
| 1345 | frame_relative_level (frame)); |
| 1346 | } |
| 1347 | get_user_print_options (&opts); |
| 1348 | if (opts.addressprint) |
| 1349 | if (!sal.symtab |
| 1350 | || frame_show_address (frame, sal) |
| 1351 | || print_what == LOC_AND_ADDRESS) |
| 1352 | { |
| 1353 | annotate_frame_address (); |
| 1354 | if (pc_p) |
| 1355 | print_pc (uiout, gdbarch, frame, pc); |
| 1356 | else |
| 1357 | uiout->field_string ("addr", "<unavailable>", |
| 1358 | metadata_style.style ()); |
| 1359 | annotate_frame_address_end (); |
| 1360 | uiout->text (" in "); |
| 1361 | } |
| 1362 | annotate_frame_function_name (); |
| 1363 | |
| 1364 | string_file stb; |
| 1365 | fprintf_symbol_filtered (&stb, funname ? funname.get () : "??", |
| 1366 | funlang, DMGL_ANSI); |
| 1367 | uiout->field_stream ("func", stb, function_name_style.style ()); |
| 1368 | uiout->wrap_hint (" "); |
| 1369 | annotate_frame_args (); |
| 1370 | |
| 1371 | uiout->text (" ("); |
| 1372 | if (print_args) |
| 1373 | { |
| 1374 | int numargs; |
| 1375 | |
| 1376 | if (gdbarch_frame_num_args_p (gdbarch)) |
| 1377 | { |
| 1378 | numargs = gdbarch_frame_num_args (gdbarch, frame); |
| 1379 | gdb_assert (numargs >= 0); |
| 1380 | } |
| 1381 | else |
| 1382 | numargs = -1; |
| 1383 | |
| 1384 | { |
| 1385 | ui_out_emit_list list_emitter (uiout, "args"); |
| 1386 | try |
| 1387 | { |
| 1388 | print_frame_args (fp_opts, func, frame, numargs, gdb_stdout); |
| 1389 | } |
| 1390 | catch (const gdb_exception_error &e) |
| 1391 | { |
| 1392 | } |
| 1393 | |
| 1394 | /* FIXME: ARGS must be a list. If one argument is a string it |
| 1395 | will have " that will not be properly escaped. */ |
| 1396 | } |
| 1397 | QUIT; |
| 1398 | } |
| 1399 | uiout->text (")"); |
| 1400 | if (print_what != SHORT_LOCATION && sal.symtab) |
| 1401 | { |
| 1402 | const char *filename_display; |
| 1403 | |
| 1404 | filename_display = symtab_to_filename_for_display (sal.symtab); |
| 1405 | annotate_frame_source_begin (); |
| 1406 | uiout->wrap_hint (" "); |
| 1407 | uiout->text (" at "); |
| 1408 | annotate_frame_source_file (); |
| 1409 | uiout->field_string ("file", filename_display, |
| 1410 | file_name_style.style ()); |
| 1411 | if (uiout->is_mi_like_p ()) |
| 1412 | { |
| 1413 | const char *fullname = symtab_to_fullname (sal.symtab); |
| 1414 | |
| 1415 | uiout->field_string ("fullname", fullname); |
| 1416 | } |
| 1417 | annotate_frame_source_file_end (); |
| 1418 | uiout->text (":"); |
| 1419 | annotate_frame_source_line (); |
| 1420 | uiout->field_signed ("line", sal.line); |
| 1421 | annotate_frame_source_end (); |
| 1422 | } |
| 1423 | |
| 1424 | if (print_what != SHORT_LOCATION |
| 1425 | && pc_p && (funname == NULL || sal.symtab == NULL)) |
| 1426 | { |
| 1427 | char *lib = solib_name_from_address (get_frame_program_space (frame), |
| 1428 | get_frame_pc (frame)); |
| 1429 | |
| 1430 | if (lib) |
| 1431 | { |
| 1432 | annotate_frame_where (); |
| 1433 | uiout->wrap_hint (" "); |
| 1434 | uiout->text (" from "); |
| 1435 | uiout->field_string ("from", lib, file_name_style.style ()); |
| 1436 | } |
| 1437 | } |
| 1438 | if (uiout->is_mi_like_p ()) |
| 1439 | uiout->field_string ("arch", |
| 1440 | (gdbarch_bfd_arch_info (gdbarch))->printable_name); |
| 1441 | } |
| 1442 | |
| 1443 | uiout->text ("\n"); |
| 1444 | } |
| 1445 | \f |
| 1446 | |
| 1447 | /* Completion function for "frame function", "info frame function", and |
| 1448 | "select-frame function" commands. */ |
| 1449 | |
| 1450 | static void |
| 1451 | frame_selection_by_function_completer (struct cmd_list_element *ignore, |
| 1452 | completion_tracker &tracker, |
| 1453 | const char *text, const char *word) |
| 1454 | { |
| 1455 | /* This is used to complete function names within a stack. It would be |
| 1456 | nice if we only offered functions that were actually in the stack. |
| 1457 | However, this would mean unwinding the stack to completion, which |
| 1458 | could take too long, or on a corrupted stack, possibly not end. |
| 1459 | Instead, we offer all symbol names as a safer choice. */ |
| 1460 | collect_symbol_completion_matches (tracker, |
| 1461 | complete_symbol_mode::EXPRESSION, |
| 1462 | symbol_name_match_type::EXPRESSION, |
| 1463 | text, word); |
| 1464 | } |
| 1465 | |
| 1466 | /* Core of all the "info frame" sub-commands. Print information about a |
| 1467 | frame FI. If SELECTED_FRAME_P is true then the user didn't provide a |
| 1468 | frame specification, they just entered 'info frame'. If the user did |
| 1469 | provide a frame specification (for example 'info frame 0', 'info frame |
| 1470 | level 1') then SELECTED_FRAME_P will be false. */ |
| 1471 | |
| 1472 | static void |
| 1473 | info_frame_command_core (struct frame_info *fi, bool selected_frame_p) |
| 1474 | { |
| 1475 | struct symbol *func; |
| 1476 | struct symtab *s; |
| 1477 | struct frame_info *calling_frame_info; |
| 1478 | int numregs; |
| 1479 | const char *funname = 0; |
| 1480 | enum language funlang = language_unknown; |
| 1481 | const char *pc_regname; |
| 1482 | struct gdbarch *gdbarch; |
| 1483 | CORE_ADDR frame_pc; |
| 1484 | int frame_pc_p; |
| 1485 | /* Initialize it to avoid "may be used uninitialized" warning. */ |
| 1486 | CORE_ADDR caller_pc = 0; |
| 1487 | int caller_pc_p = 0; |
| 1488 | |
| 1489 | gdbarch = get_frame_arch (fi); |
| 1490 | |
| 1491 | /* Name of the value returned by get_frame_pc(). Per comments, "pc" |
| 1492 | is not a good name. */ |
| 1493 | if (gdbarch_pc_regnum (gdbarch) >= 0) |
| 1494 | /* OK, this is weird. The gdbarch_pc_regnum hardware register's value can |
| 1495 | easily not match that of the internal value returned by |
| 1496 | get_frame_pc(). */ |
| 1497 | pc_regname = gdbarch_register_name (gdbarch, gdbarch_pc_regnum (gdbarch)); |
| 1498 | else |
| 1499 | /* But then, this is weird to. Even without gdbarch_pc_regnum, an |
| 1500 | architectures will often have a hardware register called "pc", |
| 1501 | and that register's value, again, can easily not match |
| 1502 | get_frame_pc(). */ |
| 1503 | pc_regname = "pc"; |
| 1504 | |
| 1505 | frame_pc_p = get_frame_pc_if_available (fi, &frame_pc); |
| 1506 | func = get_frame_function (fi); |
| 1507 | symtab_and_line sal = find_frame_sal (fi); |
| 1508 | s = sal.symtab; |
| 1509 | gdb::unique_xmalloc_ptr<char> func_only; |
| 1510 | if (func) |
| 1511 | { |
| 1512 | funname = func->print_name (); |
| 1513 | funlang = func->language (); |
| 1514 | if (funlang == language_cplus) |
| 1515 | { |
| 1516 | /* It seems appropriate to use print_name() here, |
| 1517 | to display the demangled name that we already have |
| 1518 | stored in the symbol table, but we stored a version |
| 1519 | with DMGL_PARAMS turned on, and here we don't want to |
| 1520 | display parameters. So remove the parameters. */ |
| 1521 | func_only = cp_remove_params (funname); |
| 1522 | |
| 1523 | if (func_only) |
| 1524 | funname = func_only.get (); |
| 1525 | } |
| 1526 | } |
| 1527 | else if (frame_pc_p) |
| 1528 | { |
| 1529 | struct bound_minimal_symbol msymbol; |
| 1530 | |
| 1531 | msymbol = lookup_minimal_symbol_by_pc (frame_pc); |
| 1532 | if (msymbol.minsym != NULL) |
| 1533 | { |
| 1534 | funname = msymbol.minsym->print_name (); |
| 1535 | funlang = msymbol.minsym->language (); |
| 1536 | } |
| 1537 | } |
| 1538 | calling_frame_info = get_prev_frame (fi); |
| 1539 | |
| 1540 | if (selected_frame_p && frame_relative_level (fi) >= 0) |
| 1541 | { |
| 1542 | printf_filtered (_("Stack level %d, frame at "), |
| 1543 | frame_relative_level (fi)); |
| 1544 | } |
| 1545 | else |
| 1546 | { |
| 1547 | printf_filtered (_("Stack frame at ")); |
| 1548 | } |
| 1549 | fputs_filtered (paddress (gdbarch, get_frame_base (fi)), gdb_stdout); |
| 1550 | printf_filtered (":\n"); |
| 1551 | printf_filtered (" %s = ", pc_regname); |
| 1552 | if (frame_pc_p) |
| 1553 | fputs_filtered (paddress (gdbarch, get_frame_pc (fi)), gdb_stdout); |
| 1554 | else |
| 1555 | fputs_styled ("<unavailable>", metadata_style.style (), gdb_stdout); |
| 1556 | |
| 1557 | wrap_here (" "); |
| 1558 | if (funname) |
| 1559 | { |
| 1560 | printf_filtered (" in "); |
| 1561 | fprintf_symbol_filtered (gdb_stdout, funname, funlang, |
| 1562 | DMGL_ANSI | DMGL_PARAMS); |
| 1563 | } |
| 1564 | wrap_here (" "); |
| 1565 | if (sal.symtab) |
| 1566 | printf_filtered |
| 1567 | (" (%ps:%d)", |
| 1568 | styled_string (file_name_style.style (), |
| 1569 | symtab_to_filename_for_display (sal.symtab)), |
| 1570 | sal.line); |
| 1571 | puts_filtered ("; "); |
| 1572 | wrap_here (" "); |
| 1573 | printf_filtered ("saved %s = ", pc_regname); |
| 1574 | |
| 1575 | if (!frame_id_p (frame_unwind_caller_id (fi))) |
| 1576 | val_print_not_saved (gdb_stdout); |
| 1577 | else |
| 1578 | { |
| 1579 | try |
| 1580 | { |
| 1581 | caller_pc = frame_unwind_caller_pc (fi); |
| 1582 | caller_pc_p = 1; |
| 1583 | } |
| 1584 | catch (const gdb_exception_error &ex) |
| 1585 | { |
| 1586 | switch (ex.error) |
| 1587 | { |
| 1588 | case NOT_AVAILABLE_ERROR: |
| 1589 | val_print_unavailable (gdb_stdout); |
| 1590 | break; |
| 1591 | case OPTIMIZED_OUT_ERROR: |
| 1592 | val_print_not_saved (gdb_stdout); |
| 1593 | break; |
| 1594 | default: |
| 1595 | fprintf_styled (gdb_stdout, metadata_style.style (), |
| 1596 | _("<error: %s>"), |
| 1597 | ex.what ()); |
| 1598 | break; |
| 1599 | } |
| 1600 | } |
| 1601 | } |
| 1602 | |
| 1603 | if (caller_pc_p) |
| 1604 | fputs_filtered (paddress (gdbarch, caller_pc), gdb_stdout); |
| 1605 | printf_filtered ("\n"); |
| 1606 | |
| 1607 | if (calling_frame_info == NULL) |
| 1608 | { |
| 1609 | enum unwind_stop_reason reason; |
| 1610 | |
| 1611 | reason = get_frame_unwind_stop_reason (fi); |
| 1612 | if (reason != UNWIND_NO_REASON) |
| 1613 | printf_filtered (_(" Outermost frame: %s\n"), |
| 1614 | frame_stop_reason_string (fi)); |
| 1615 | } |
| 1616 | else if (get_frame_type (fi) == TAILCALL_FRAME) |
| 1617 | puts_filtered (" tail call frame"); |
| 1618 | else if (get_frame_type (fi) == INLINE_FRAME) |
| 1619 | printf_filtered (" inlined into frame %d", |
| 1620 | frame_relative_level (get_prev_frame (fi))); |
| 1621 | else |
| 1622 | { |
| 1623 | printf_filtered (" called by frame at "); |
| 1624 | fputs_filtered (paddress (gdbarch, get_frame_base (calling_frame_info)), |
| 1625 | gdb_stdout); |
| 1626 | } |
| 1627 | if (get_next_frame (fi) && calling_frame_info) |
| 1628 | puts_filtered (","); |
| 1629 | wrap_here (" "); |
| 1630 | if (get_next_frame (fi)) |
| 1631 | { |
| 1632 | printf_filtered (" caller of frame at "); |
| 1633 | fputs_filtered (paddress (gdbarch, get_frame_base (get_next_frame (fi))), |
| 1634 | gdb_stdout); |
| 1635 | } |
| 1636 | if (get_next_frame (fi) || calling_frame_info) |
| 1637 | puts_filtered ("\n"); |
| 1638 | |
| 1639 | if (s) |
| 1640 | printf_filtered (" source language %s.\n", |
| 1641 | language_str (s->language)); |
| 1642 | |
| 1643 | { |
| 1644 | /* Address of the argument list for this frame, or 0. */ |
| 1645 | CORE_ADDR arg_list = get_frame_args_address (fi); |
| 1646 | /* Number of args for this frame, or -1 if unknown. */ |
| 1647 | int numargs; |
| 1648 | |
| 1649 | if (arg_list == 0) |
| 1650 | printf_filtered (" Arglist at unknown address.\n"); |
| 1651 | else |
| 1652 | { |
| 1653 | printf_filtered (" Arglist at "); |
| 1654 | fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout); |
| 1655 | printf_filtered (","); |
| 1656 | |
| 1657 | if (!gdbarch_frame_num_args_p (gdbarch)) |
| 1658 | { |
| 1659 | numargs = -1; |
| 1660 | puts_filtered (" args: "); |
| 1661 | } |
| 1662 | else |
| 1663 | { |
| 1664 | numargs = gdbarch_frame_num_args (gdbarch, fi); |
| 1665 | gdb_assert (numargs >= 0); |
| 1666 | if (numargs == 0) |
| 1667 | puts_filtered (" no args."); |
| 1668 | else if (numargs == 1) |
| 1669 | puts_filtered (" 1 arg: "); |
| 1670 | else |
| 1671 | printf_filtered (" %d args: ", numargs); |
| 1672 | } |
| 1673 | print_frame_args (user_frame_print_options, |
| 1674 | func, fi, numargs, gdb_stdout); |
| 1675 | puts_filtered ("\n"); |
| 1676 | } |
| 1677 | } |
| 1678 | { |
| 1679 | /* Address of the local variables for this frame, or 0. */ |
| 1680 | CORE_ADDR arg_list = get_frame_locals_address (fi); |
| 1681 | |
| 1682 | if (arg_list == 0) |
| 1683 | printf_filtered (" Locals at unknown address,"); |
| 1684 | else |
| 1685 | { |
| 1686 | printf_filtered (" Locals at "); |
| 1687 | fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout); |
| 1688 | printf_filtered (","); |
| 1689 | } |
| 1690 | } |
| 1691 | |
| 1692 | /* Print as much information as possible on the location of all the |
| 1693 | registers. */ |
| 1694 | { |
| 1695 | int count; |
| 1696 | int i; |
| 1697 | int need_nl = 1; |
| 1698 | int sp_regnum = gdbarch_sp_regnum (gdbarch); |
| 1699 | |
| 1700 | /* The sp is special; what's displayed isn't the save address, but |
| 1701 | the value of the previous frame's sp. This is a legacy thing, |
| 1702 | at one stage the frame cached the previous frame's SP instead |
| 1703 | of its address, hence it was easiest to just display the cached |
| 1704 | value. */ |
| 1705 | if (sp_regnum >= 0) |
| 1706 | { |
| 1707 | struct value *value = frame_unwind_register_value (fi, sp_regnum); |
| 1708 | gdb_assert (value != NULL); |
| 1709 | |
| 1710 | if (!value_optimized_out (value) && value_entirely_available (value)) |
| 1711 | { |
| 1712 | if (VALUE_LVAL (value) == not_lval) |
| 1713 | { |
| 1714 | CORE_ADDR sp; |
| 1715 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1716 | int sp_size = register_size (gdbarch, sp_regnum); |
| 1717 | |
| 1718 | sp = extract_unsigned_integer (value_contents_all (value), |
| 1719 | sp_size, byte_order); |
| 1720 | |
| 1721 | printf_filtered (" Previous frame's sp is "); |
| 1722 | fputs_filtered (paddress (gdbarch, sp), gdb_stdout); |
| 1723 | printf_filtered ("\n"); |
| 1724 | } |
| 1725 | else if (VALUE_LVAL (value) == lval_memory) |
| 1726 | { |
| 1727 | printf_filtered (" Previous frame's sp at "); |
| 1728 | fputs_filtered (paddress (gdbarch, value_address (value)), |
| 1729 | gdb_stdout); |
| 1730 | printf_filtered ("\n"); |
| 1731 | } |
| 1732 | else if (VALUE_LVAL (value) == lval_register) |
| 1733 | { |
| 1734 | printf_filtered (" Previous frame's sp in %s\n", |
| 1735 | gdbarch_register_name (gdbarch, |
| 1736 | VALUE_REGNUM (value))); |
| 1737 | } |
| 1738 | |
| 1739 | release_value (value); |
| 1740 | need_nl = 0; |
| 1741 | } |
| 1742 | /* else keep quiet. */ |
| 1743 | } |
| 1744 | |
| 1745 | count = 0; |
| 1746 | numregs = gdbarch_num_cooked_regs (gdbarch); |
| 1747 | for (i = 0; i < numregs; i++) |
| 1748 | if (i != sp_regnum |
| 1749 | && gdbarch_register_reggroup_p (gdbarch, i, all_reggroup)) |
| 1750 | { |
| 1751 | enum lval_type lval; |
| 1752 | int optimized; |
| 1753 | int unavailable; |
| 1754 | CORE_ADDR addr; |
| 1755 | int realnum; |
| 1756 | |
| 1757 | /* Find out the location of the saved register without |
| 1758 | fetching the corresponding value. */ |
| 1759 | frame_register_unwind (fi, i, &optimized, &unavailable, |
| 1760 | &lval, &addr, &realnum, NULL); |
| 1761 | /* For moment, only display registers that were saved on the |
| 1762 | stack. */ |
| 1763 | if (!optimized && !unavailable && lval == lval_memory) |
| 1764 | { |
| 1765 | if (count == 0) |
| 1766 | puts_filtered (" Saved registers:\n "); |
| 1767 | else |
| 1768 | puts_filtered (","); |
| 1769 | wrap_here (" "); |
| 1770 | printf_filtered (" %s at ", |
| 1771 | gdbarch_register_name (gdbarch, i)); |
| 1772 | fputs_filtered (paddress (gdbarch, addr), gdb_stdout); |
| 1773 | count++; |
| 1774 | } |
| 1775 | } |
| 1776 | if (count || need_nl) |
| 1777 | puts_filtered ("\n"); |
| 1778 | } |
| 1779 | } |
| 1780 | |
| 1781 | /* Return the innermost frame at level LEVEL. */ |
| 1782 | |
| 1783 | static struct frame_info * |
| 1784 | leading_innermost_frame (int level) |
| 1785 | { |
| 1786 | struct frame_info *leading; |
| 1787 | |
| 1788 | leading = get_current_frame (); |
| 1789 | |
| 1790 | gdb_assert (level >= 0); |
| 1791 | |
| 1792 | while (leading != nullptr && level) |
| 1793 | { |
| 1794 | QUIT; |
| 1795 | leading = get_prev_frame (leading); |
| 1796 | level--; |
| 1797 | } |
| 1798 | |
| 1799 | return leading; |
| 1800 | } |
| 1801 | |
| 1802 | /* Return the starting frame needed to handle COUNT outermost frames. */ |
| 1803 | |
| 1804 | static struct frame_info * |
| 1805 | trailing_outermost_frame (int count) |
| 1806 | { |
| 1807 | struct frame_info *current; |
| 1808 | struct frame_info *trailing; |
| 1809 | |
| 1810 | trailing = get_current_frame (); |
| 1811 | |
| 1812 | gdb_assert (count > 0); |
| 1813 | |
| 1814 | current = trailing; |
| 1815 | while (current != nullptr && count--) |
| 1816 | { |
| 1817 | QUIT; |
| 1818 | current = get_prev_frame (current); |
| 1819 | } |
| 1820 | |
| 1821 | /* Will stop when CURRENT reaches the top of the stack. |
| 1822 | TRAILING will be COUNT below it. */ |
| 1823 | while (current != nullptr) |
| 1824 | { |
| 1825 | QUIT; |
| 1826 | trailing = get_prev_frame (trailing); |
| 1827 | current = get_prev_frame (current); |
| 1828 | } |
| 1829 | |
| 1830 | return trailing; |
| 1831 | } |
| 1832 | |
| 1833 | /* The core of all the "select-frame" sub-commands. Just wraps a call to |
| 1834 | SELECT_FRAME. */ |
| 1835 | |
| 1836 | static void |
| 1837 | select_frame_command_core (struct frame_info *fi, bool ignored) |
| 1838 | { |
| 1839 | struct frame_info *prev_frame = get_selected_frame_if_set (); |
| 1840 | select_frame (fi); |
| 1841 | if (get_selected_frame_if_set () != prev_frame) |
| 1842 | gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME); |
| 1843 | } |
| 1844 | |
| 1845 | /* See stack.h. */ |
| 1846 | |
| 1847 | void |
| 1848 | select_frame_for_mi (struct frame_info *fi) |
| 1849 | { |
| 1850 | select_frame_command_core (fi, false /* Ignored. */); |
| 1851 | } |
| 1852 | |
| 1853 | /* The core of all the "frame" sub-commands. Select frame FI, and if this |
| 1854 | means we change frame send out a change notification (otherwise, just |
| 1855 | reprint the current frame summary). */ |
| 1856 | |
| 1857 | static void |
| 1858 | frame_command_core (struct frame_info *fi, bool ignored) |
| 1859 | { |
| 1860 | struct frame_info *prev_frame = get_selected_frame_if_set (); |
| 1861 | |
| 1862 | select_frame (fi); |
| 1863 | if (get_selected_frame_if_set () != prev_frame) |
| 1864 | gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME); |
| 1865 | else |
| 1866 | print_selected_thread_frame (current_uiout, USER_SELECTED_FRAME); |
| 1867 | } |
| 1868 | |
| 1869 | /* The three commands 'frame', 'select-frame', and 'info frame' all have a |
| 1870 | common set of sub-commands that allow a specific frame to be selected. |
| 1871 | All of the sub-command functions are static methods within this class |
| 1872 | template which is then instantiated below. The template parameter is a |
| 1873 | callback used to implement the functionality of the base command |
| 1874 | ('frame', 'select-frame', or 'info frame'). |
| 1875 | |
| 1876 | In the template parameter FI is the frame being selected. The |
| 1877 | SELECTED_FRAME_P flag is true if the frame being selected was done by |
| 1878 | default, which happens when the user uses the base command with no |
| 1879 | arguments. For example the commands 'info frame', 'select-frame', |
| 1880 | 'frame' will all cause SELECTED_FRAME_P to be true. In all other cases |
| 1881 | SELECTED_FRAME_P is false. */ |
| 1882 | |
| 1883 | template <void (*FPTR) (struct frame_info *fi, bool selected_frame_p)> |
| 1884 | class frame_command_helper |
| 1885 | { |
| 1886 | public: |
| 1887 | |
| 1888 | /* The "frame level" family of commands. The ARG is an integer that is |
| 1889 | the frame's level in the stack. */ |
| 1890 | static void |
| 1891 | level (const char *arg, int from_tty) |
| 1892 | { |
| 1893 | int level = value_as_long (parse_and_eval (arg)); |
| 1894 | struct frame_info *fid |
| 1895 | = find_relative_frame (get_current_frame (), &level); |
| 1896 | if (level != 0) |
| 1897 | error (_("No frame at level %s."), arg); |
| 1898 | FPTR (fid, false); |
| 1899 | } |
| 1900 | |
| 1901 | /* The "frame address" family of commands. ARG is a stack-pointer |
| 1902 | address for an existing frame. This command does not allow new |
| 1903 | frames to be created. */ |
| 1904 | |
| 1905 | static void |
| 1906 | address (const char *arg, int from_tty) |
| 1907 | { |
| 1908 | CORE_ADDR addr = value_as_address (parse_and_eval (arg)); |
| 1909 | struct frame_info *fid = find_frame_for_address (addr); |
| 1910 | if (fid == NULL) |
| 1911 | error (_("No frame at address %s."), arg); |
| 1912 | FPTR (fid, false); |
| 1913 | } |
| 1914 | |
| 1915 | /* The "frame view" family of commands. ARG is one or two addresses and |
| 1916 | is used to view a frame that might be outside the current backtrace. |
| 1917 | The addresses are stack-pointer address, and (optional) pc-address. */ |
| 1918 | |
| 1919 | static void |
| 1920 | view (const char *args, int from_tty) |
| 1921 | { |
| 1922 | struct frame_info *fid; |
| 1923 | |
| 1924 | if (args == NULL) |
| 1925 | error (_("Missing address argument to view a frame")); |
| 1926 | |
| 1927 | gdb_argv argv (args); |
| 1928 | |
| 1929 | if (argv.count () == 2) |
| 1930 | { |
| 1931 | CORE_ADDR addr[2]; |
| 1932 | |
| 1933 | addr [0] = value_as_address (parse_and_eval (argv[0])); |
| 1934 | addr [1] = value_as_address (parse_and_eval (argv[1])); |
| 1935 | fid = create_new_frame (addr[0], addr[1]); |
| 1936 | } |
| 1937 | else |
| 1938 | { |
| 1939 | CORE_ADDR addr = value_as_address (parse_and_eval (argv[0])); |
| 1940 | fid = create_new_frame (addr, false); |
| 1941 | } |
| 1942 | FPTR (fid, false); |
| 1943 | } |
| 1944 | |
| 1945 | /* The "frame function" family of commands. ARG is the name of a |
| 1946 | function within the stack, the first function (searching from frame |
| 1947 | 0) with that name will be selected. */ |
| 1948 | |
| 1949 | static void |
| 1950 | function (const char *arg, int from_tty) |
| 1951 | { |
| 1952 | if (arg == NULL) |
| 1953 | error (_("Missing function name argument")); |
| 1954 | struct frame_info *fid = find_frame_for_function (arg); |
| 1955 | if (fid == NULL) |
| 1956 | error (_("No frame for function \"%s\"."), arg); |
| 1957 | FPTR (fid, false); |
| 1958 | } |
| 1959 | |
| 1960 | /* The "frame" base command, that is, when no sub-command is specified. |
| 1961 | If one argument is provided then we assume that this is a frame's |
| 1962 | level as historically, this was the supported command syntax that was |
| 1963 | used most often. |
| 1964 | |
| 1965 | If no argument is provided, then the current frame is selected. */ |
| 1966 | |
| 1967 | static void |
| 1968 | base_command (const char *arg, int from_tty) |
| 1969 | { |
| 1970 | if (arg == NULL) |
| 1971 | FPTR (get_selected_frame (_("No stack.")), true); |
| 1972 | else |
| 1973 | level (arg, from_tty); |
| 1974 | } |
| 1975 | }; |
| 1976 | |
| 1977 | /* Instantiate three FRAME_COMMAND_HELPER instances to implement the |
| 1978 | sub-commands for 'info frame', 'frame', and 'select-frame' commands. */ |
| 1979 | |
| 1980 | static frame_command_helper <info_frame_command_core> info_frame_cmd; |
| 1981 | static frame_command_helper <frame_command_core> frame_cmd; |
| 1982 | static frame_command_helper <select_frame_command_core> select_frame_cmd; |
| 1983 | |
| 1984 | /* Print briefly all stack frames or just the innermost COUNT_EXP |
| 1985 | frames. */ |
| 1986 | |
| 1987 | static void |
| 1988 | backtrace_command_1 (const frame_print_options &fp_opts, |
| 1989 | const backtrace_cmd_options &bt_opts, |
| 1990 | const char *count_exp, int from_tty) |
| 1991 | |
| 1992 | { |
| 1993 | struct frame_info *fi; |
| 1994 | int count; |
| 1995 | int py_start = 0, py_end = 0; |
| 1996 | enum ext_lang_bt_status result = EXT_LANG_BT_ERROR; |
| 1997 | |
| 1998 | if (!target_has_stack) |
| 1999 | error (_("No stack.")); |
| 2000 | |
| 2001 | if (count_exp) |
| 2002 | { |
| 2003 | count = parse_and_eval_long (count_exp); |
| 2004 | if (count < 0) |
| 2005 | py_start = count; |
| 2006 | else |
| 2007 | { |
| 2008 | py_start = 0; |
| 2009 | /* The argument to apply_ext_lang_frame_filter is the number |
| 2010 | of the final frame to print, and frames start at 0. */ |
| 2011 | py_end = count - 1; |
| 2012 | } |
| 2013 | } |
| 2014 | else |
| 2015 | { |
| 2016 | py_end = -1; |
| 2017 | count = -1; |
| 2018 | } |
| 2019 | |
| 2020 | frame_filter_flags flags = 0; |
| 2021 | |
| 2022 | if (bt_opts.full) |
| 2023 | flags |= PRINT_LOCALS; |
| 2024 | if (bt_opts.hide) |
| 2025 | flags |= PRINT_HIDE; |
| 2026 | |
| 2027 | if (!bt_opts.no_filters) |
| 2028 | { |
| 2029 | enum ext_lang_frame_args arg_type; |
| 2030 | |
| 2031 | flags |= PRINT_LEVEL | PRINT_FRAME_INFO | PRINT_ARGS; |
| 2032 | if (from_tty) |
| 2033 | flags |= PRINT_MORE_FRAMES; |
| 2034 | |
| 2035 | if (fp_opts.print_frame_arguments == print_frame_arguments_scalars) |
| 2036 | arg_type = CLI_SCALAR_VALUES; |
| 2037 | else if (fp_opts.print_frame_arguments == print_frame_arguments_all) |
| 2038 | arg_type = CLI_ALL_VALUES; |
| 2039 | else if (fp_opts.print_frame_arguments == print_frame_arguments_presence) |
| 2040 | arg_type = CLI_PRESENCE; |
| 2041 | else if (fp_opts.print_frame_arguments == print_frame_arguments_none) |
| 2042 | arg_type = NO_VALUES; |
| 2043 | else |
| 2044 | gdb_assert (0); |
| 2045 | |
| 2046 | result = apply_ext_lang_frame_filter (get_current_frame (), flags, |
| 2047 | arg_type, current_uiout, |
| 2048 | py_start, py_end); |
| 2049 | } |
| 2050 | |
| 2051 | /* Run the inbuilt backtrace if there are no filters registered, or |
| 2052 | "-no-filters" has been specified from the command. */ |
| 2053 | if (bt_opts.no_filters || result == EXT_LANG_BT_NO_FILTERS) |
| 2054 | { |
| 2055 | struct frame_info *trailing; |
| 2056 | |
| 2057 | /* The following code must do two things. First, it must set the |
| 2058 | variable TRAILING to the frame from which we should start |
| 2059 | printing. Second, it must set the variable count to the number |
| 2060 | of frames which we should print, or -1 if all of them. */ |
| 2061 | |
| 2062 | if (count_exp != NULL && count < 0) |
| 2063 | { |
| 2064 | trailing = trailing_outermost_frame (-count); |
| 2065 | count = -1; |
| 2066 | } |
| 2067 | else |
| 2068 | trailing = get_current_frame (); |
| 2069 | |
| 2070 | for (fi = trailing; fi && count--; fi = get_prev_frame (fi)) |
| 2071 | { |
| 2072 | QUIT; |
| 2073 | |
| 2074 | /* Don't use print_stack_frame; if an error() occurs it probably |
| 2075 | means further attempts to backtrace would fail (on the other |
| 2076 | hand, perhaps the code does or could be fixed to make sure |
| 2077 | the frame->prev field gets set to NULL in that case). */ |
| 2078 | |
| 2079 | print_frame_info (fp_opts, fi, 1, LOCATION, 1, 0); |
| 2080 | if ((flags & PRINT_LOCALS) != 0) |
| 2081 | { |
| 2082 | struct frame_id frame_id = get_frame_id (fi); |
| 2083 | |
| 2084 | print_frame_local_vars (fi, false, NULL, NULL, 1, gdb_stdout); |
| 2085 | |
| 2086 | /* print_frame_local_vars invalidates FI. */ |
| 2087 | fi = frame_find_by_id (frame_id); |
| 2088 | if (fi == NULL) |
| 2089 | { |
| 2090 | trailing = NULL; |
| 2091 | warning (_("Unable to restore previously selected frame.")); |
| 2092 | break; |
| 2093 | } |
| 2094 | } |
| 2095 | |
| 2096 | /* Save the last frame to check for error conditions. */ |
| 2097 | trailing = fi; |
| 2098 | } |
| 2099 | |
| 2100 | /* If we've stopped before the end, mention that. */ |
| 2101 | if (fi && from_tty) |
| 2102 | printf_filtered (_("(More stack frames follow...)\n")); |
| 2103 | |
| 2104 | /* If we've run out of frames, and the reason appears to be an error |
| 2105 | condition, print it. */ |
| 2106 | if (fi == NULL && trailing != NULL) |
| 2107 | { |
| 2108 | enum unwind_stop_reason reason; |
| 2109 | |
| 2110 | reason = get_frame_unwind_stop_reason (trailing); |
| 2111 | if (reason >= UNWIND_FIRST_ERROR) |
| 2112 | printf_filtered (_("Backtrace stopped: %s\n"), |
| 2113 | frame_stop_reason_string (trailing)); |
| 2114 | } |
| 2115 | } |
| 2116 | } |
| 2117 | |
| 2118 | /* Create an option_def_group array grouping all the "backtrace" |
| 2119 | options, with FP_OPTS, BT_CMD_OPT, SET_BT_OPTS as contexts. */ |
| 2120 | |
| 2121 | static inline std::array<gdb::option::option_def_group, 3> |
| 2122 | make_backtrace_options_def_group (frame_print_options *fp_opts, |
| 2123 | backtrace_cmd_options *bt_cmd_opts, |
| 2124 | set_backtrace_options *set_bt_opts) |
| 2125 | { |
| 2126 | return {{ |
| 2127 | { {frame_print_option_defs}, fp_opts }, |
| 2128 | { {set_backtrace_option_defs}, set_bt_opts }, |
| 2129 | { {backtrace_command_option_defs}, bt_cmd_opts } |
| 2130 | }}; |
| 2131 | } |
| 2132 | |
| 2133 | /* Parse the backtrace command's qualifiers. Returns ARG advanced |
| 2134 | past the qualifiers, if any. BT_CMD_OPTS, if not null, is used to |
| 2135 | store the parsed qualifiers. */ |
| 2136 | |
| 2137 | static const char * |
| 2138 | parse_backtrace_qualifiers (const char *arg, |
| 2139 | backtrace_cmd_options *bt_cmd_opts = nullptr) |
| 2140 | { |
| 2141 | while (true) |
| 2142 | { |
| 2143 | const char *save_arg = arg; |
| 2144 | std::string this_arg = extract_arg (&arg); |
| 2145 | |
| 2146 | if (this_arg.empty ()) |
| 2147 | return arg; |
| 2148 | |
| 2149 | if (subset_compare (this_arg.c_str (), "no-filters")) |
| 2150 | { |
| 2151 | if (bt_cmd_opts != nullptr) |
| 2152 | bt_cmd_opts->no_filters = true; |
| 2153 | } |
| 2154 | else if (subset_compare (this_arg.c_str (), "full")) |
| 2155 | { |
| 2156 | if (bt_cmd_opts != nullptr) |
| 2157 | bt_cmd_opts->full = true; |
| 2158 | } |
| 2159 | else if (subset_compare (this_arg.c_str (), "hide")) |
| 2160 | { |
| 2161 | if (bt_cmd_opts != nullptr) |
| 2162 | bt_cmd_opts->hide = true; |
| 2163 | } |
| 2164 | else |
| 2165 | { |
| 2166 | /* Not a recognized qualifier, so stop. */ |
| 2167 | return save_arg; |
| 2168 | } |
| 2169 | } |
| 2170 | } |
| 2171 | |
| 2172 | static void |
| 2173 | backtrace_command (const char *arg, int from_tty) |
| 2174 | { |
| 2175 | frame_print_options fp_opts = user_frame_print_options; |
| 2176 | backtrace_cmd_options bt_cmd_opts; |
| 2177 | set_backtrace_options set_bt_opts = user_set_backtrace_options; |
| 2178 | |
| 2179 | auto grp |
| 2180 | = make_backtrace_options_def_group (&fp_opts, &bt_cmd_opts, &set_bt_opts); |
| 2181 | gdb::option::process_options |
| 2182 | (&arg, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 2183 | |
| 2184 | /* Parse non-'-'-prefixed qualifiers, for backwards |
| 2185 | compatibility. */ |
| 2186 | if (arg != NULL) |
| 2187 | { |
| 2188 | arg = parse_backtrace_qualifiers (arg, &bt_cmd_opts); |
| 2189 | if (*arg == '\0') |
| 2190 | arg = NULL; |
| 2191 | } |
| 2192 | |
| 2193 | /* These options are handled quite deep in the unwind machinery, so |
| 2194 | we get to pass them down by swapping globals. */ |
| 2195 | scoped_restore restore_set_backtrace_options |
| 2196 | = make_scoped_restore (&user_set_backtrace_options, set_bt_opts); |
| 2197 | |
| 2198 | backtrace_command_1 (fp_opts, bt_cmd_opts, arg, from_tty); |
| 2199 | } |
| 2200 | |
| 2201 | /* Completer for the "backtrace" command. */ |
| 2202 | |
| 2203 | static void |
| 2204 | backtrace_command_completer (struct cmd_list_element *ignore, |
| 2205 | completion_tracker &tracker, |
| 2206 | const char *text, const char */*word*/) |
| 2207 | { |
| 2208 | const auto group |
| 2209 | = make_backtrace_options_def_group (nullptr, nullptr, nullptr); |
| 2210 | if (gdb::option::complete_options |
| 2211 | (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group)) |
| 2212 | return; |
| 2213 | |
| 2214 | if (*text != '\0') |
| 2215 | { |
| 2216 | const char *p = skip_to_space (text); |
| 2217 | if (*p == '\0') |
| 2218 | { |
| 2219 | static const char *const backtrace_cmd_qualifier_choices[] = { |
| 2220 | "full", "no-filters", "hide", nullptr, |
| 2221 | }; |
| 2222 | complete_on_enum (tracker, backtrace_cmd_qualifier_choices, |
| 2223 | text, text); |
| 2224 | |
| 2225 | if (tracker.have_completions ()) |
| 2226 | return; |
| 2227 | } |
| 2228 | else |
| 2229 | { |
| 2230 | const char *cmd = parse_backtrace_qualifiers (text); |
| 2231 | tracker.advance_custom_word_point_by (cmd - text); |
| 2232 | text = cmd; |
| 2233 | } |
| 2234 | } |
| 2235 | |
| 2236 | const char *word = advance_to_expression_complete_word_point (tracker, text); |
| 2237 | expression_completer (ignore, tracker, text, word); |
| 2238 | } |
| 2239 | |
| 2240 | /* Iterate over the local variables of a block B, calling CB with |
| 2241 | CB_DATA. */ |
| 2242 | |
| 2243 | static void |
| 2244 | iterate_over_block_locals (const struct block *b, |
| 2245 | iterate_over_block_arg_local_vars_cb cb, |
| 2246 | void *cb_data) |
| 2247 | { |
| 2248 | struct block_iterator iter; |
| 2249 | struct symbol *sym; |
| 2250 | |
| 2251 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 2252 | { |
| 2253 | switch (SYMBOL_CLASS (sym)) |
| 2254 | { |
| 2255 | case LOC_CONST: |
| 2256 | case LOC_LOCAL: |
| 2257 | case LOC_REGISTER: |
| 2258 | case LOC_STATIC: |
| 2259 | case LOC_COMPUTED: |
| 2260 | case LOC_OPTIMIZED_OUT: |
| 2261 | if (SYMBOL_IS_ARGUMENT (sym)) |
| 2262 | break; |
| 2263 | if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN) |
| 2264 | break; |
| 2265 | (*cb) (sym->print_name (), sym, cb_data); |
| 2266 | break; |
| 2267 | |
| 2268 | default: |
| 2269 | /* Ignore symbols which are not locals. */ |
| 2270 | break; |
| 2271 | } |
| 2272 | } |
| 2273 | } |
| 2274 | |
| 2275 | /* Iterate over all the local variables in block B, including all its |
| 2276 | superblocks, stopping when the top-level block is reached. */ |
| 2277 | |
| 2278 | void |
| 2279 | iterate_over_block_local_vars (const struct block *block, |
| 2280 | iterate_over_block_arg_local_vars_cb cb, |
| 2281 | void *cb_data) |
| 2282 | { |
| 2283 | while (block) |
| 2284 | { |
| 2285 | iterate_over_block_locals (block, cb, cb_data); |
| 2286 | /* After handling the function's top-level block, stop. Don't |
| 2287 | continue to its superblock, the block of per-file |
| 2288 | symbols. */ |
| 2289 | if (BLOCK_FUNCTION (block)) |
| 2290 | break; |
| 2291 | block = BLOCK_SUPERBLOCK (block); |
| 2292 | } |
| 2293 | } |
| 2294 | |
| 2295 | /* Data to be passed around in the calls to the locals and args |
| 2296 | iterators. */ |
| 2297 | |
| 2298 | struct print_variable_and_value_data |
| 2299 | { |
| 2300 | gdb::optional<compiled_regex> preg; |
| 2301 | gdb::optional<compiled_regex> treg; |
| 2302 | struct frame_id frame_id; |
| 2303 | int num_tabs; |
| 2304 | struct ui_file *stream; |
| 2305 | int values_printed; |
| 2306 | }; |
| 2307 | |
| 2308 | /* The callback for the locals and args iterators. */ |
| 2309 | |
| 2310 | static void |
| 2311 | do_print_variable_and_value (const char *print_name, |
| 2312 | struct symbol *sym, |
| 2313 | void *cb_data) |
| 2314 | { |
| 2315 | struct print_variable_and_value_data *p |
| 2316 | = (struct print_variable_and_value_data *) cb_data; |
| 2317 | struct frame_info *frame; |
| 2318 | |
| 2319 | if (p->preg.has_value () |
| 2320 | && p->preg->exec (sym->natural_name (), 0, NULL, 0) != 0) |
| 2321 | return; |
| 2322 | if (p->treg.has_value () |
| 2323 | && !treg_matches_sym_type_name (*p->treg, sym)) |
| 2324 | return; |
| 2325 | |
| 2326 | frame = frame_find_by_id (p->frame_id); |
| 2327 | if (frame == NULL) |
| 2328 | { |
| 2329 | warning (_("Unable to restore previously selected frame.")); |
| 2330 | return; |
| 2331 | } |
| 2332 | |
| 2333 | print_variable_and_value (print_name, sym, frame, p->stream, p->num_tabs); |
| 2334 | |
| 2335 | /* print_variable_and_value invalidates FRAME. */ |
| 2336 | frame = NULL; |
| 2337 | |
| 2338 | p->values_printed = 1; |
| 2339 | } |
| 2340 | |
| 2341 | /* Prepares the regular expression REG from REGEXP. |
| 2342 | If REGEXP is NULL, it results in an empty regular expression. */ |
| 2343 | |
| 2344 | static void |
| 2345 | prepare_reg (const char *regexp, gdb::optional<compiled_regex> *reg) |
| 2346 | { |
| 2347 | if (regexp != NULL) |
| 2348 | { |
| 2349 | int cflags = REG_NOSUB | (case_sensitivity == case_sensitive_off |
| 2350 | ? REG_ICASE : 0); |
| 2351 | reg->emplace (regexp, cflags, _("Invalid regexp")); |
| 2352 | } |
| 2353 | else |
| 2354 | reg->reset (); |
| 2355 | } |
| 2356 | |
| 2357 | /* Print all variables from the innermost up to the function block of FRAME. |
| 2358 | Print them with values to STREAM indented by NUM_TABS. |
| 2359 | If REGEXP is not NULL, only print local variables whose name |
| 2360 | matches REGEXP. |
| 2361 | If T_REGEXP is not NULL, only print local variables whose type |
| 2362 | matches T_REGEXP. |
| 2363 | If no local variables have been printed and !QUIET, prints a message |
| 2364 | explaining why no local variables could be printed. |
| 2365 | |
| 2366 | This function will invalidate FRAME. */ |
| 2367 | |
| 2368 | static void |
| 2369 | print_frame_local_vars (struct frame_info *frame, |
| 2370 | bool quiet, |
| 2371 | const char *regexp, const char *t_regexp, |
| 2372 | int num_tabs, struct ui_file *stream) |
| 2373 | { |
| 2374 | struct print_variable_and_value_data cb_data; |
| 2375 | const struct block *block; |
| 2376 | CORE_ADDR pc; |
| 2377 | |
| 2378 | if (!get_frame_pc_if_available (frame, &pc)) |
| 2379 | { |
| 2380 | if (!quiet) |
| 2381 | fprintf_filtered (stream, |
| 2382 | _("PC unavailable, cannot determine locals.\n")); |
| 2383 | return; |
| 2384 | } |
| 2385 | |
| 2386 | block = get_frame_block (frame, 0); |
| 2387 | if (block == 0) |
| 2388 | { |
| 2389 | if (!quiet) |
| 2390 | fprintf_filtered (stream, "No symbol table info available.\n"); |
| 2391 | return; |
| 2392 | } |
| 2393 | |
| 2394 | prepare_reg (regexp, &cb_data.preg); |
| 2395 | prepare_reg (t_regexp, &cb_data.treg); |
| 2396 | cb_data.frame_id = get_frame_id (frame); |
| 2397 | cb_data.num_tabs = 4 * num_tabs; |
| 2398 | cb_data.stream = stream; |
| 2399 | cb_data.values_printed = 0; |
| 2400 | |
| 2401 | /* Temporarily change the selected frame to the given FRAME. |
| 2402 | This allows routines that rely on the selected frame instead |
| 2403 | of being given a frame as parameter to use the correct frame. */ |
| 2404 | scoped_restore_selected_frame restore_selected_frame; |
| 2405 | select_frame (frame); |
| 2406 | |
| 2407 | iterate_over_block_local_vars (block, |
| 2408 | do_print_variable_and_value, |
| 2409 | &cb_data); |
| 2410 | |
| 2411 | if (!cb_data.values_printed && !quiet) |
| 2412 | { |
| 2413 | if (regexp == NULL && t_regexp == NULL) |
| 2414 | fprintf_filtered (stream, _("No locals.\n")); |
| 2415 | else |
| 2416 | fprintf_filtered (stream, _("No matching locals.\n")); |
| 2417 | } |
| 2418 | } |
| 2419 | |
| 2420 | /* Structure to hold the values of the options used by the 'info |
| 2421 | variables' command and other similar commands. These correspond to the |
| 2422 | -q and -t options. */ |
| 2423 | |
| 2424 | struct info_print_options |
| 2425 | { |
| 2426 | bool quiet = false; |
| 2427 | char *type_regexp = nullptr; |
| 2428 | |
| 2429 | ~info_print_options () |
| 2430 | { |
| 2431 | xfree (type_regexp); |
| 2432 | } |
| 2433 | }; |
| 2434 | |
| 2435 | /* The options used by the 'info locals' and 'info args' commands. */ |
| 2436 | |
| 2437 | static const gdb::option::option_def info_print_options_defs[] = { |
| 2438 | gdb::option::boolean_option_def<info_print_options> { |
| 2439 | "q", |
| 2440 | [] (info_print_options *opt) { return &opt->quiet; }, |
| 2441 | nullptr, /* show_cmd_cb */ |
| 2442 | nullptr /* set_doc */ |
| 2443 | }, |
| 2444 | |
| 2445 | gdb::option::string_option_def<info_print_options> { |
| 2446 | "t", |
| 2447 | [] (info_print_options *opt) { return &opt->type_regexp; }, |
| 2448 | nullptr, /* show_cmd_cb */ |
| 2449 | nullptr /* set_doc */ |
| 2450 | } |
| 2451 | }; |
| 2452 | |
| 2453 | /* Returns the option group used by 'info locals' and 'info args' |
| 2454 | commands. */ |
| 2455 | |
| 2456 | static gdb::option::option_def_group |
| 2457 | make_info_print_options_def_group (info_print_options *opts) |
| 2458 | { |
| 2459 | return {{info_print_options_defs}, opts}; |
| 2460 | } |
| 2461 | |
| 2462 | /* Command completer for 'info locals' and 'info args'. */ |
| 2463 | |
| 2464 | static void |
| 2465 | info_print_command_completer (struct cmd_list_element *ignore, |
| 2466 | completion_tracker &tracker, |
| 2467 | const char *text, const char * /* word */) |
| 2468 | { |
| 2469 | const auto group |
| 2470 | = make_info_print_options_def_group (nullptr); |
| 2471 | if (gdb::option::complete_options |
| 2472 | (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group)) |
| 2473 | return; |
| 2474 | |
| 2475 | const char *word = advance_to_expression_complete_word_point (tracker, text); |
| 2476 | symbol_completer (ignore, tracker, text, word); |
| 2477 | } |
| 2478 | |
| 2479 | /* Implement the 'info locals' command. */ |
| 2480 | |
| 2481 | void |
| 2482 | info_locals_command (const char *args, int from_tty) |
| 2483 | { |
| 2484 | info_print_options opts; |
| 2485 | auto grp = make_info_print_options_def_group (&opts); |
| 2486 | gdb::option::process_options |
| 2487 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 2488 | if (args != nullptr && *args == '\0') |
| 2489 | args = nullptr; |
| 2490 | |
| 2491 | print_frame_local_vars (get_selected_frame (_("No frame selected.")), |
| 2492 | opts.quiet, args, opts.type_regexp, |
| 2493 | 0, gdb_stdout); |
| 2494 | } |
| 2495 | |
| 2496 | /* Iterate over all the argument variables in block B. */ |
| 2497 | |
| 2498 | void |
| 2499 | iterate_over_block_arg_vars (const struct block *b, |
| 2500 | iterate_over_block_arg_local_vars_cb cb, |
| 2501 | void *cb_data) |
| 2502 | { |
| 2503 | struct block_iterator iter; |
| 2504 | struct symbol *sym, *sym2; |
| 2505 | |
| 2506 | ALL_BLOCK_SYMBOLS (b, iter, sym) |
| 2507 | { |
| 2508 | /* Don't worry about things which aren't arguments. */ |
| 2509 | if (SYMBOL_IS_ARGUMENT (sym)) |
| 2510 | { |
| 2511 | /* We have to look up the symbol because arguments can have |
| 2512 | two entries (one a parameter, one a local) and the one we |
| 2513 | want is the local, which lookup_symbol will find for us. |
| 2514 | This includes gcc1 (not gcc2) on the sparc when passing a |
| 2515 | small structure and gcc2 when the argument type is float |
| 2516 | and it is passed as a double and converted to float by |
| 2517 | the prologue (in the latter case the type of the LOC_ARG |
| 2518 | symbol is double and the type of the LOC_LOCAL symbol is |
| 2519 | float). There are also LOC_ARG/LOC_REGISTER pairs which |
| 2520 | are not combined in symbol-reading. */ |
| 2521 | |
| 2522 | sym2 = lookup_symbol_search_name (sym->search_name (), |
| 2523 | b, VAR_DOMAIN).symbol; |
| 2524 | (*cb) (sym->print_name (), sym2, cb_data); |
| 2525 | } |
| 2526 | } |
| 2527 | } |
| 2528 | |
| 2529 | /* Print all argument variables of the function of FRAME. |
| 2530 | Print them with values to STREAM. |
| 2531 | If REGEXP is not NULL, only print argument variables whose name |
| 2532 | matches REGEXP. |
| 2533 | If T_REGEXP is not NULL, only print argument variables whose type |
| 2534 | matches T_REGEXP. |
| 2535 | If no argument variables have been printed and !QUIET, prints a message |
| 2536 | explaining why no argument variables could be printed. |
| 2537 | |
| 2538 | This function will invalidate FRAME. */ |
| 2539 | |
| 2540 | static void |
| 2541 | print_frame_arg_vars (struct frame_info *frame, |
| 2542 | bool quiet, |
| 2543 | const char *regexp, const char *t_regexp, |
| 2544 | struct ui_file *stream) |
| 2545 | { |
| 2546 | struct print_variable_and_value_data cb_data; |
| 2547 | struct symbol *func; |
| 2548 | CORE_ADDR pc; |
| 2549 | gdb::optional<compiled_regex> preg; |
| 2550 | gdb::optional<compiled_regex> treg; |
| 2551 | |
| 2552 | if (!get_frame_pc_if_available (frame, &pc)) |
| 2553 | { |
| 2554 | if (!quiet) |
| 2555 | fprintf_filtered (stream, |
| 2556 | _("PC unavailable, cannot determine args.\n")); |
| 2557 | return; |
| 2558 | } |
| 2559 | |
| 2560 | func = get_frame_function (frame); |
| 2561 | if (func == NULL) |
| 2562 | { |
| 2563 | if (!quiet) |
| 2564 | fprintf_filtered (stream, _("No symbol table info available.\n")); |
| 2565 | return; |
| 2566 | } |
| 2567 | |
| 2568 | prepare_reg (regexp, &cb_data.preg); |
| 2569 | prepare_reg (t_regexp, &cb_data.treg); |
| 2570 | cb_data.frame_id = get_frame_id (frame); |
| 2571 | cb_data.num_tabs = 0; |
| 2572 | cb_data.stream = stream; |
| 2573 | cb_data.values_printed = 0; |
| 2574 | |
| 2575 | iterate_over_block_arg_vars (SYMBOL_BLOCK_VALUE (func), |
| 2576 | do_print_variable_and_value, &cb_data); |
| 2577 | |
| 2578 | /* do_print_variable_and_value invalidates FRAME. */ |
| 2579 | frame = NULL; |
| 2580 | |
| 2581 | if (!cb_data.values_printed && !quiet) |
| 2582 | { |
| 2583 | if (regexp == NULL && t_regexp == NULL) |
| 2584 | fprintf_filtered (stream, _("No arguments.\n")); |
| 2585 | else |
| 2586 | fprintf_filtered (stream, _("No matching arguments.\n")); |
| 2587 | } |
| 2588 | } |
| 2589 | |
| 2590 | /* Implement the 'info args' command. */ |
| 2591 | |
| 2592 | void |
| 2593 | info_args_command (const char *args, int from_tty) |
| 2594 | { |
| 2595 | info_print_options opts; |
| 2596 | auto grp = make_info_print_options_def_group (&opts); |
| 2597 | gdb::option::process_options |
| 2598 | (&args, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, grp); |
| 2599 | if (args != nullptr && *args == '\0') |
| 2600 | args = nullptr; |
| 2601 | |
| 2602 | print_frame_arg_vars (get_selected_frame (_("No frame selected.")), |
| 2603 | opts.quiet, args, opts.type_regexp, gdb_stdout); |
| 2604 | } |
| 2605 | \f |
| 2606 | /* Return the symbol-block in which the selected frame is executing. |
| 2607 | Can return zero under various legitimate circumstances. |
| 2608 | |
| 2609 | If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant |
| 2610 | code address within the block returned. We use this to decide |
| 2611 | which macros are in scope. */ |
| 2612 | |
| 2613 | const struct block * |
| 2614 | get_selected_block (CORE_ADDR *addr_in_block) |
| 2615 | { |
| 2616 | if (!has_stack_frames ()) |
| 2617 | return 0; |
| 2618 | |
| 2619 | return get_frame_block (get_selected_frame (NULL), addr_in_block); |
| 2620 | } |
| 2621 | |
| 2622 | /* Find a frame a certain number of levels away from FRAME. |
| 2623 | LEVEL_OFFSET_PTR points to an int containing the number of levels. |
| 2624 | Positive means go to earlier frames (up); negative, the reverse. |
| 2625 | The int that contains the number of levels is counted toward |
| 2626 | zero as the frames for those levels are found. |
| 2627 | If the top or bottom frame is reached, that frame is returned, |
| 2628 | but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates |
| 2629 | how much farther the original request asked to go. */ |
| 2630 | |
| 2631 | struct frame_info * |
| 2632 | find_relative_frame (struct frame_info *frame, int *level_offset_ptr) |
| 2633 | { |
| 2634 | /* Going up is simple: just call get_prev_frame enough times or |
| 2635 | until the initial frame is reached. */ |
| 2636 | while (*level_offset_ptr > 0) |
| 2637 | { |
| 2638 | struct frame_info *prev = get_prev_frame (frame); |
| 2639 | |
| 2640 | if (!prev) |
| 2641 | break; |
| 2642 | (*level_offset_ptr)--; |
| 2643 | frame = prev; |
| 2644 | } |
| 2645 | |
| 2646 | /* Going down is just as simple. */ |
| 2647 | while (*level_offset_ptr < 0) |
| 2648 | { |
| 2649 | struct frame_info *next = get_next_frame (frame); |
| 2650 | |
| 2651 | if (!next) |
| 2652 | break; |
| 2653 | (*level_offset_ptr)++; |
| 2654 | frame = next; |
| 2655 | } |
| 2656 | |
| 2657 | return frame; |
| 2658 | } |
| 2659 | |
| 2660 | /* Select the frame up one or COUNT_EXP stack levels from the |
| 2661 | previously selected frame, and print it briefly. */ |
| 2662 | |
| 2663 | static void |
| 2664 | up_silently_base (const char *count_exp) |
| 2665 | { |
| 2666 | struct frame_info *frame; |
| 2667 | int count = 1; |
| 2668 | |
| 2669 | if (count_exp) |
| 2670 | count = parse_and_eval_long (count_exp); |
| 2671 | |
| 2672 | frame = find_relative_frame (get_selected_frame ("No stack."), &count); |
| 2673 | if (count != 0 && count_exp == NULL) |
| 2674 | error (_("Initial frame selected; you cannot go up.")); |
| 2675 | select_frame (frame); |
| 2676 | } |
| 2677 | |
| 2678 | static void |
| 2679 | up_silently_command (const char *count_exp, int from_tty) |
| 2680 | { |
| 2681 | up_silently_base (count_exp); |
| 2682 | } |
| 2683 | |
| 2684 | static void |
| 2685 | up_command (const char *count_exp, int from_tty) |
| 2686 | { |
| 2687 | up_silently_base (count_exp); |
| 2688 | gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME); |
| 2689 | } |
| 2690 | |
| 2691 | /* Select the frame down one or COUNT_EXP stack levels from the previously |
| 2692 | selected frame, and print it briefly. */ |
| 2693 | |
| 2694 | static void |
| 2695 | down_silently_base (const char *count_exp) |
| 2696 | { |
| 2697 | struct frame_info *frame; |
| 2698 | int count = -1; |
| 2699 | |
| 2700 | if (count_exp) |
| 2701 | count = -parse_and_eval_long (count_exp); |
| 2702 | |
| 2703 | frame = find_relative_frame (get_selected_frame ("No stack."), &count); |
| 2704 | if (count != 0 && count_exp == NULL) |
| 2705 | { |
| 2706 | /* We only do this if COUNT_EXP is not specified. That way |
| 2707 | "down" means to really go down (and let me know if that is |
| 2708 | impossible), but "down 9999" can be used to mean go all the |
| 2709 | way down without getting an error. */ |
| 2710 | |
| 2711 | error (_("Bottom (innermost) frame selected; you cannot go down.")); |
| 2712 | } |
| 2713 | |
| 2714 | select_frame (frame); |
| 2715 | } |
| 2716 | |
| 2717 | static void |
| 2718 | down_silently_command (const char *count_exp, int from_tty) |
| 2719 | { |
| 2720 | down_silently_base (count_exp); |
| 2721 | } |
| 2722 | |
| 2723 | static void |
| 2724 | down_command (const char *count_exp, int from_tty) |
| 2725 | { |
| 2726 | down_silently_base (count_exp); |
| 2727 | gdb::observers::user_selected_context_changed.notify (USER_SELECTED_FRAME); |
| 2728 | } |
| 2729 | |
| 2730 | void |
| 2731 | return_command (const char *retval_exp, int from_tty) |
| 2732 | { |
| 2733 | /* Initialize it just to avoid a GCC false warning. */ |
| 2734 | enum return_value_convention rv_conv = RETURN_VALUE_STRUCT_CONVENTION; |
| 2735 | struct frame_info *thisframe; |
| 2736 | struct gdbarch *gdbarch; |
| 2737 | struct symbol *thisfun; |
| 2738 | struct value *return_value = NULL; |
| 2739 | struct value *function = NULL; |
| 2740 | const char *query_prefix = ""; |
| 2741 | |
| 2742 | thisframe = get_selected_frame ("No selected frame."); |
| 2743 | thisfun = get_frame_function (thisframe); |
| 2744 | gdbarch = get_frame_arch (thisframe); |
| 2745 | |
| 2746 | if (get_frame_type (get_current_frame ()) == INLINE_FRAME) |
| 2747 | error (_("Can not force return from an inlined function.")); |
| 2748 | |
| 2749 | /* Compute the return value. If the computation triggers an error, |
| 2750 | let it bail. If the return type can't be handled, set |
| 2751 | RETURN_VALUE to NULL, and QUERY_PREFIX to an informational |
| 2752 | message. */ |
| 2753 | if (retval_exp) |
| 2754 | { |
| 2755 | expression_up retval_expr = parse_expression (retval_exp); |
| 2756 | struct type *return_type = NULL; |
| 2757 | |
| 2758 | /* Compute the return value. Should the computation fail, this |
| 2759 | call throws an error. */ |
| 2760 | return_value = evaluate_expression (retval_expr.get ()); |
| 2761 | |
| 2762 | /* Cast return value to the return type of the function. Should |
| 2763 | the cast fail, this call throws an error. */ |
| 2764 | if (thisfun != NULL) |
| 2765 | return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun)); |
| 2766 | if (return_type == NULL) |
| 2767 | { |
| 2768 | if (retval_expr->elts[0].opcode != UNOP_CAST |
| 2769 | && retval_expr->elts[0].opcode != UNOP_CAST_TYPE) |
| 2770 | error (_("Return value type not available for selected " |
| 2771 | "stack frame.\n" |
| 2772 | "Please use an explicit cast of the value to return.")); |
| 2773 | return_type = value_type (return_value); |
| 2774 | } |
| 2775 | return_type = check_typedef (return_type); |
| 2776 | return_value = value_cast (return_type, return_value); |
| 2777 | |
| 2778 | /* Make sure the value is fully evaluated. It may live in the |
| 2779 | stack frame we're about to pop. */ |
| 2780 | if (value_lazy (return_value)) |
| 2781 | value_fetch_lazy (return_value); |
| 2782 | |
| 2783 | if (thisfun != NULL) |
| 2784 | function = read_var_value (thisfun, NULL, thisframe); |
| 2785 | |
| 2786 | rv_conv = RETURN_VALUE_REGISTER_CONVENTION; |
| 2787 | if (return_type->code () == TYPE_CODE_VOID) |
| 2788 | /* If the return-type is "void", don't try to find the |
| 2789 | return-value's location. However, do still evaluate the |
| 2790 | return expression so that, even when the expression result |
| 2791 | is discarded, side effects such as "return i++" still |
| 2792 | occur. */ |
| 2793 | return_value = NULL; |
| 2794 | else if (thisfun != NULL) |
| 2795 | { |
| 2796 | rv_conv = struct_return_convention (gdbarch, function, return_type); |
| 2797 | if (rv_conv == RETURN_VALUE_STRUCT_CONVENTION |
| 2798 | || rv_conv == RETURN_VALUE_ABI_RETURNS_ADDRESS) |
| 2799 | { |
| 2800 | query_prefix = "The location at which to store the " |
| 2801 | "function's return value is unknown.\n" |
| 2802 | "If you continue, the return value " |
| 2803 | "that you specified will be ignored.\n"; |
| 2804 | return_value = NULL; |
| 2805 | } |
| 2806 | } |
| 2807 | } |
| 2808 | |
| 2809 | /* Does an interactive user really want to do this? Include |
| 2810 | information, such as how well GDB can handle the return value, in |
| 2811 | the query message. */ |
| 2812 | if (from_tty) |
| 2813 | { |
| 2814 | int confirmed; |
| 2815 | |
| 2816 | if (thisfun == NULL) |
| 2817 | confirmed = query (_("%sMake selected stack frame return now? "), |
| 2818 | query_prefix); |
| 2819 | else |
| 2820 | { |
| 2821 | if (TYPE_NO_RETURN (thisfun->type)) |
| 2822 | warning (_("Function does not return normally to caller.")); |
| 2823 | confirmed = query (_("%sMake %s return now? "), query_prefix, |
| 2824 | thisfun->print_name ()); |
| 2825 | } |
| 2826 | if (!confirmed) |
| 2827 | error (_("Not confirmed")); |
| 2828 | } |
| 2829 | |
| 2830 | /* Discard the selected frame and all frames inner-to it. */ |
| 2831 | frame_pop (get_selected_frame (NULL)); |
| 2832 | |
| 2833 | /* Store RETURN_VALUE in the just-returned register set. */ |
| 2834 | if (return_value != NULL) |
| 2835 | { |
| 2836 | struct type *return_type = value_type (return_value); |
| 2837 | struct gdbarch *cache_arch = get_current_regcache ()->arch (); |
| 2838 | |
| 2839 | gdb_assert (rv_conv != RETURN_VALUE_STRUCT_CONVENTION |
| 2840 | && rv_conv != RETURN_VALUE_ABI_RETURNS_ADDRESS); |
| 2841 | gdbarch_return_value (cache_arch, function, return_type, |
| 2842 | get_current_regcache (), NULL /*read*/, |
| 2843 | value_contents (return_value) /*write*/); |
| 2844 | } |
| 2845 | |
| 2846 | /* If we are at the end of a call dummy now, pop the dummy frame |
| 2847 | too. */ |
| 2848 | if (get_frame_type (get_current_frame ()) == DUMMY_FRAME) |
| 2849 | frame_pop (get_current_frame ()); |
| 2850 | |
| 2851 | select_frame (get_current_frame ()); |
| 2852 | /* If interactive, print the frame that is now current. */ |
| 2853 | if (from_tty) |
| 2854 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
| 2855 | } |
| 2856 | |
| 2857 | /* Find the most inner frame in the current stack for a function called |
| 2858 | FUNCTION_NAME. If no matching frame is found return NULL. */ |
| 2859 | |
| 2860 | static struct frame_info * |
| 2861 | find_frame_for_function (const char *function_name) |
| 2862 | { |
| 2863 | /* Used to hold the lower and upper addresses for each of the |
| 2864 | SYMTAB_AND_LINEs found for functions matching FUNCTION_NAME. */ |
| 2865 | struct function_bounds |
| 2866 | { |
| 2867 | CORE_ADDR low, high; |
| 2868 | }; |
| 2869 | struct frame_info *frame; |
| 2870 | bool found = false; |
| 2871 | int level = 1; |
| 2872 | |
| 2873 | gdb_assert (function_name != NULL); |
| 2874 | |
| 2875 | frame = get_current_frame (); |
| 2876 | std::vector<symtab_and_line> sals |
| 2877 | = decode_line_with_current_source (function_name, |
| 2878 | DECODE_LINE_FUNFIRSTLINE); |
| 2879 | gdb::def_vector<function_bounds> func_bounds (sals.size ()); |
| 2880 | for (size_t i = 0; i < sals.size (); i++) |
| 2881 | { |
| 2882 | if (sals[i].pspace != current_program_space) |
| 2883 | func_bounds[i].low = func_bounds[i].high = 0; |
| 2884 | else if (sals[i].pc == 0 |
| 2885 | || find_pc_partial_function (sals[i].pc, NULL, |
| 2886 | &func_bounds[i].low, |
| 2887 | &func_bounds[i].high) == 0) |
| 2888 | func_bounds[i].low = func_bounds[i].high = 0; |
| 2889 | } |
| 2890 | |
| 2891 | do |
| 2892 | { |
| 2893 | for (size_t i = 0; (i < sals.size () && !found); i++) |
| 2894 | found = (get_frame_pc (frame) >= func_bounds[i].low |
| 2895 | && get_frame_pc (frame) < func_bounds[i].high); |
| 2896 | if (!found) |
| 2897 | { |
| 2898 | level = 1; |
| 2899 | frame = find_relative_frame (frame, &level); |
| 2900 | } |
| 2901 | } |
| 2902 | while (!found && level == 0); |
| 2903 | |
| 2904 | if (!found) |
| 2905 | frame = NULL; |
| 2906 | |
| 2907 | return frame; |
| 2908 | } |
| 2909 | |
| 2910 | /* Implements the dbx 'func' command. */ |
| 2911 | |
| 2912 | static void |
| 2913 | func_command (const char *arg, int from_tty) |
| 2914 | { |
| 2915 | if (arg == NULL) |
| 2916 | return; |
| 2917 | |
| 2918 | struct frame_info *frame = find_frame_for_function (arg); |
| 2919 | if (frame == NULL) |
| 2920 | error (_("'%s' not within current stack frame."), arg); |
| 2921 | if (frame != get_selected_frame (NULL)) |
| 2922 | { |
| 2923 | select_frame (frame); |
| 2924 | print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC, 1); |
| 2925 | } |
| 2926 | } |
| 2927 | |
| 2928 | /* The qcs command line flags for the "frame apply" commands. Keep |
| 2929 | this in sync with the "thread apply" commands. */ |
| 2930 | |
| 2931 | using qcs_flag_option_def |
| 2932 | = gdb::option::flag_option_def<qcs_flags>; |
| 2933 | |
| 2934 | static const gdb::option::option_def fr_qcs_flags_option_defs[] = { |
| 2935 | qcs_flag_option_def { |
| 2936 | "q", [] (qcs_flags *opt) { return &opt->quiet; }, |
| 2937 | N_("Disables printing the frame location information."), |
| 2938 | }, |
| 2939 | |
| 2940 | qcs_flag_option_def { |
| 2941 | "c", [] (qcs_flags *opt) { return &opt->cont; }, |
| 2942 | N_("Print any error raised by COMMAND and continue."), |
| 2943 | }, |
| 2944 | |
| 2945 | qcs_flag_option_def { |
| 2946 | "s", [] (qcs_flags *opt) { return &opt->silent; }, |
| 2947 | N_("Silently ignore any errors or empty output produced by COMMAND."), |
| 2948 | }, |
| 2949 | }; |
| 2950 | |
| 2951 | /* Create an option_def_group array for all the "frame apply" options, |
| 2952 | with FLAGS and SET_BT_OPTS as context. */ |
| 2953 | |
| 2954 | static inline std::array<gdb::option::option_def_group, 2> |
| 2955 | make_frame_apply_options_def_group (qcs_flags *flags, |
| 2956 | set_backtrace_options *set_bt_opts) |
| 2957 | { |
| 2958 | return {{ |
| 2959 | { {fr_qcs_flags_option_defs}, flags }, |
| 2960 | { {set_backtrace_option_defs}, set_bt_opts }, |
| 2961 | }}; |
| 2962 | } |
| 2963 | |
| 2964 | /* Apply a GDB command to all stack frames, or a set of identified frames, |
| 2965 | or innermost COUNT frames. |
| 2966 | With a negative COUNT, apply command on outermost -COUNT frames. |
| 2967 | |
| 2968 | frame apply 3 info frame Apply 'info frame' to frames 0, 1, 2 |
| 2969 | frame apply -3 info frame Apply 'info frame' to outermost 3 frames. |
| 2970 | frame apply all x/i $pc Apply 'x/i $pc' cmd to all frames. |
| 2971 | frame apply all -s p local_var_no_idea_in_which_frame |
| 2972 | If a frame has a local variable called |
| 2973 | local_var_no_idea_in_which_frame, print frame |
| 2974 | and value of local_var_no_idea_in_which_frame. |
| 2975 | frame apply all -s -q p local_var_no_idea_in_which_frame |
| 2976 | Same as before, but only print the variable value. |
| 2977 | frame apply level 2-5 0 4-7 -s p i = i + 1 |
| 2978 | Adds 1 to the variable i in the specified frames. |
| 2979 | Note that i will be incremented twice in |
| 2980 | frames 4 and 5. */ |
| 2981 | |
| 2982 | /* Apply a GDB command to COUNT stack frames, starting at TRAILING. |
| 2983 | CMD starts with 0 or more qcs flags followed by the GDB command to apply. |
| 2984 | COUNT -1 means all frames starting at TRAILING. WHICH_COMMAND is used |
| 2985 | for error messages. */ |
| 2986 | |
| 2987 | static void |
| 2988 | frame_apply_command_count (const char *which_command, |
| 2989 | const char *cmd, int from_tty, |
| 2990 | struct frame_info *trailing, int count) |
| 2991 | { |
| 2992 | qcs_flags flags; |
| 2993 | set_backtrace_options set_bt_opts = user_set_backtrace_options; |
| 2994 | |
| 2995 | auto group = make_frame_apply_options_def_group (&flags, &set_bt_opts); |
| 2996 | gdb::option::process_options |
| 2997 | (&cmd, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group); |
| 2998 | |
| 2999 | validate_flags_qcs (which_command, &flags); |
| 3000 | |
| 3001 | if (cmd == NULL || *cmd == '\0') |
| 3002 | error (_("Please specify a command to apply on the selected frames")); |
| 3003 | |
| 3004 | /* The below will restore the current inferior/thread/frame. |
| 3005 | Usually, only the frame is effectively to be restored. |
| 3006 | But in case CMD switches of inferior/thread, better restore |
| 3007 | these also. */ |
| 3008 | scoped_restore_current_thread restore_thread; |
| 3009 | |
| 3010 | /* These options are handled quite deep in the unwind machinery, so |
| 3011 | we get to pass them down by swapping globals. */ |
| 3012 | scoped_restore restore_set_backtrace_options |
| 3013 | = make_scoped_restore (&user_set_backtrace_options, set_bt_opts); |
| 3014 | |
| 3015 | for (frame_info *fi = trailing; fi && count--; fi = get_prev_frame (fi)) |
| 3016 | { |
| 3017 | QUIT; |
| 3018 | |
| 3019 | select_frame (fi); |
| 3020 | try |
| 3021 | { |
| 3022 | std::string cmd_result; |
| 3023 | { |
| 3024 | /* In case CMD switches of inferior/thread/frame, the below |
| 3025 | restores the inferior/thread/frame. FI can then be |
| 3026 | set to the selected frame. */ |
| 3027 | scoped_restore_current_thread restore_fi_current_frame; |
| 3028 | |
| 3029 | cmd_result = execute_command_to_string |
| 3030 | (cmd, from_tty, gdb_stdout->term_out ()); |
| 3031 | } |
| 3032 | fi = get_selected_frame (_("frame apply " |
| 3033 | "unable to get selected frame.")); |
| 3034 | if (!flags.silent || cmd_result.length () > 0) |
| 3035 | { |
| 3036 | if (!flags.quiet) |
| 3037 | print_stack_frame (fi, 1, LOCATION, 0); |
| 3038 | printf_filtered ("%s", cmd_result.c_str ()); |
| 3039 | } |
| 3040 | } |
| 3041 | catch (const gdb_exception_error &ex) |
| 3042 | { |
| 3043 | fi = get_selected_frame (_("frame apply " |
| 3044 | "unable to get selected frame.")); |
| 3045 | if (!flags.silent) |
| 3046 | { |
| 3047 | if (!flags.quiet) |
| 3048 | print_stack_frame (fi, 1, LOCATION, 0); |
| 3049 | if (flags.cont) |
| 3050 | printf_filtered ("%s\n", ex.what ()); |
| 3051 | else |
| 3052 | throw; |
| 3053 | } |
| 3054 | } |
| 3055 | } |
| 3056 | } |
| 3057 | |
| 3058 | /* Completer for the "frame apply ..." commands. */ |
| 3059 | |
| 3060 | static void |
| 3061 | frame_apply_completer (completion_tracker &tracker, const char *text) |
| 3062 | { |
| 3063 | const auto group = make_frame_apply_options_def_group (nullptr, nullptr); |
| 3064 | if (gdb::option::complete_options |
| 3065 | (tracker, &text, gdb::option::PROCESS_OPTIONS_UNKNOWN_IS_OPERAND, group)) |
| 3066 | return; |
| 3067 | |
| 3068 | complete_nested_command_line (tracker, text); |
| 3069 | } |
| 3070 | |
| 3071 | /* Completer for the "frame apply" commands. */ |
| 3072 | |
| 3073 | static void |
| 3074 | frame_apply_level_cmd_completer (struct cmd_list_element *ignore, |
| 3075 | completion_tracker &tracker, |
| 3076 | const char *text, const char */*word*/) |
| 3077 | { |
| 3078 | /* Do this explicitly because there's an early return below. */ |
| 3079 | tracker.set_use_custom_word_point (true); |
| 3080 | |
| 3081 | number_or_range_parser levels (text); |
| 3082 | |
| 3083 | /* Skip the LEVEL list to find the options and command args. */ |
| 3084 | try |
| 3085 | { |
| 3086 | while (!levels.finished ()) |
| 3087 | { |
| 3088 | /* Call for effect. */ |
| 3089 | levels.get_number (); |
| 3090 | |
| 3091 | if (levels.in_range ()) |
| 3092 | levels.skip_range (); |
| 3093 | } |
| 3094 | } |
| 3095 | catch (const gdb_exception_error &ex) |
| 3096 | { |
| 3097 | /* get_number throws if it parses a negative number, for |
| 3098 | example. But a seemingly negative number may be the start of |
| 3099 | an option instead. */ |
| 3100 | } |
| 3101 | |
| 3102 | const char *cmd = levels.cur_tok (); |
| 3103 | |
| 3104 | if (cmd == text) |
| 3105 | { |
| 3106 | /* No level list yet. */ |
| 3107 | return; |
| 3108 | } |
| 3109 | |
| 3110 | /* Check if we're past a valid LEVEL already. */ |
| 3111 | if (levels.finished () |
| 3112 | && cmd > text && !isspace (cmd[-1])) |
| 3113 | return; |
| 3114 | |
| 3115 | /* We're past LEVELs, advance word point. */ |
| 3116 | tracker.advance_custom_word_point_by (cmd - text); |
| 3117 | text = cmd; |
| 3118 | |
| 3119 | frame_apply_completer (tracker, text); |
| 3120 | } |
| 3121 | |
| 3122 | /* Completer for the "frame apply all" command. */ |
| 3123 | |
| 3124 | void |
| 3125 | frame_apply_all_cmd_completer (struct cmd_list_element *ignore, |
| 3126 | completion_tracker &tracker, |
| 3127 | const char *text, const char */*word*/) |
| 3128 | { |
| 3129 | frame_apply_completer (tracker, text); |
| 3130 | } |
| 3131 | |
| 3132 | /* Completer for the "frame apply COUNT" command. */ |
| 3133 | |
| 3134 | static void |
| 3135 | frame_apply_cmd_completer (struct cmd_list_element *ignore, |
| 3136 | completion_tracker &tracker, |
| 3137 | const char *text, const char */*word*/) |
| 3138 | { |
| 3139 | const char *cmd = text; |
| 3140 | |
| 3141 | int count = get_number_trailer (&cmd, 0); |
| 3142 | if (count == 0) |
| 3143 | return; |
| 3144 | |
| 3145 | /* Check if we're past a valid COUNT already. */ |
| 3146 | if (cmd > text && !isspace (cmd[-1])) |
| 3147 | return; |
| 3148 | |
| 3149 | /* We're past COUNT, advance word point. */ |
| 3150 | tracker.advance_custom_word_point_by (cmd - text); |
| 3151 | text = cmd; |
| 3152 | |
| 3153 | frame_apply_completer (tracker, text); |
| 3154 | } |
| 3155 | |
| 3156 | /* Implementation of the "frame apply level" command. */ |
| 3157 | |
| 3158 | static void |
| 3159 | frame_apply_level_command (const char *cmd, int from_tty) |
| 3160 | { |
| 3161 | if (!target_has_stack) |
| 3162 | error (_("No stack.")); |
| 3163 | |
| 3164 | bool level_found = false; |
| 3165 | const char *levels_str = cmd; |
| 3166 | number_or_range_parser levels (levels_str); |
| 3167 | |
| 3168 | /* Skip the LEVEL list to find the flags and command args. */ |
| 3169 | while (!levels.finished ()) |
| 3170 | { |
| 3171 | /* Call for effect. */ |
| 3172 | levels.get_number (); |
| 3173 | |
| 3174 | level_found = true; |
| 3175 | if (levels.in_range ()) |
| 3176 | levels.skip_range (); |
| 3177 | } |
| 3178 | |
| 3179 | if (!level_found) |
| 3180 | error (_("Missing or invalid LEVEL... argument")); |
| 3181 | |
| 3182 | cmd = levels.cur_tok (); |
| 3183 | |
| 3184 | /* Redo the LEVELS parsing, but applying COMMAND. */ |
| 3185 | levels.init (levels_str); |
| 3186 | while (!levels.finished ()) |
| 3187 | { |
| 3188 | const int level_beg = levels.get_number (); |
| 3189 | int n_frames; |
| 3190 | |
| 3191 | if (levels.in_range ()) |
| 3192 | { |
| 3193 | n_frames = levels.end_value () - level_beg + 1; |
| 3194 | levels.skip_range (); |
| 3195 | } |
| 3196 | else |
| 3197 | n_frames = 1; |
| 3198 | |
| 3199 | frame_apply_command_count ("frame apply level", cmd, from_tty, |
| 3200 | leading_innermost_frame (level_beg), n_frames); |
| 3201 | } |
| 3202 | } |
| 3203 | |
| 3204 | /* Implementation of the "frame apply all" command. */ |
| 3205 | |
| 3206 | static void |
| 3207 | frame_apply_all_command (const char *cmd, int from_tty) |
| 3208 | { |
| 3209 | if (!target_has_stack) |
| 3210 | error (_("No stack.")); |
| 3211 | |
| 3212 | frame_apply_command_count ("frame apply all", cmd, from_tty, |
| 3213 | get_current_frame (), INT_MAX); |
| 3214 | } |
| 3215 | |
| 3216 | /* Implementation of the "frame apply" command. */ |
| 3217 | |
| 3218 | static void |
| 3219 | frame_apply_command (const char* cmd, int from_tty) |
| 3220 | { |
| 3221 | int count; |
| 3222 | struct frame_info *trailing; |
| 3223 | |
| 3224 | if (!target_has_stack) |
| 3225 | error (_("No stack.")); |
| 3226 | |
| 3227 | if (cmd == NULL) |
| 3228 | error (_("Missing COUNT argument.")); |
| 3229 | count = get_number_trailer (&cmd, 0); |
| 3230 | if (count == 0) |
| 3231 | error (_("Invalid COUNT argument.")); |
| 3232 | |
| 3233 | if (count < 0) |
| 3234 | { |
| 3235 | trailing = trailing_outermost_frame (-count); |
| 3236 | count = -1; |
| 3237 | } |
| 3238 | else |
| 3239 | trailing = get_current_frame (); |
| 3240 | |
| 3241 | frame_apply_command_count ("frame apply", cmd, from_tty, |
| 3242 | trailing, count); |
| 3243 | } |
| 3244 | |
| 3245 | /* Implementation of the "faas" command. */ |
| 3246 | |
| 3247 | static void |
| 3248 | faas_command (const char *cmd, int from_tty) |
| 3249 | { |
| 3250 | if (cmd == NULL || *cmd == '\0') |
| 3251 | error (_("Please specify a command to apply on all frames")); |
| 3252 | std::string expanded = std::string ("frame apply all -s ") + cmd; |
| 3253 | execute_command (expanded.c_str (), from_tty); |
| 3254 | } |
| 3255 | |
| 3256 | |
| 3257 | /* Find inner-mode frame with frame address ADDRESS. Return NULL if no |
| 3258 | matching frame can be found. */ |
| 3259 | |
| 3260 | static struct frame_info * |
| 3261 | find_frame_for_address (CORE_ADDR address) |
| 3262 | { |
| 3263 | struct frame_id id; |
| 3264 | struct frame_info *fid; |
| 3265 | |
| 3266 | id = frame_id_build_wild (address); |
| 3267 | |
| 3268 | /* If (s)he specifies the frame with an address, he deserves |
| 3269 | what (s)he gets. Still, give the highest one that matches. |
| 3270 | (NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't |
| 3271 | know). */ |
| 3272 | for (fid = get_current_frame (); |
| 3273 | fid != NULL; |
| 3274 | fid = get_prev_frame (fid)) |
| 3275 | { |
| 3276 | if (frame_id_eq (id, get_frame_id (fid))) |
| 3277 | { |
| 3278 | struct frame_info *prev_frame; |
| 3279 | |
| 3280 | while (1) |
| 3281 | { |
| 3282 | prev_frame = get_prev_frame (fid); |
| 3283 | if (!prev_frame |
| 3284 | || !frame_id_eq (id, get_frame_id (prev_frame))) |
| 3285 | break; |
| 3286 | fid = prev_frame; |
| 3287 | } |
| 3288 | return fid; |
| 3289 | } |
| 3290 | } |
| 3291 | return NULL; |
| 3292 | } |
| 3293 | |
| 3294 | \f |
| 3295 | |
| 3296 | /* Commands with a prefix of `frame apply'. */ |
| 3297 | static struct cmd_list_element *frame_apply_cmd_list = NULL; |
| 3298 | |
| 3299 | /* Commands with a prefix of `frame'. */ |
| 3300 | static struct cmd_list_element *frame_cmd_list = NULL; |
| 3301 | |
| 3302 | /* Commands with a prefix of `select frame'. */ |
| 3303 | static struct cmd_list_element *select_frame_cmd_list = NULL; |
| 3304 | |
| 3305 | /* Commands with a prefix of `info frame'. */ |
| 3306 | static struct cmd_list_element *info_frame_cmd_list = NULL; |
| 3307 | |
| 3308 | void _initialize_stack (); |
| 3309 | void |
| 3310 | _initialize_stack () |
| 3311 | { |
| 3312 | struct cmd_list_element *cmd; |
| 3313 | |
| 3314 | add_com ("return", class_stack, return_command, _("\ |
| 3315 | Make selected stack frame return to its caller.\n\ |
| 3316 | Control remains in the debugger, but when you continue\n\ |
| 3317 | execution will resume in the frame above the one now selected.\n\ |
| 3318 | If an argument is given, it is an expression for the value to return.")); |
| 3319 | |
| 3320 | add_com ("up", class_stack, up_command, _("\ |
| 3321 | Select and print stack frame that called this one.\n\ |
| 3322 | An argument says how many frames up to go.")); |
| 3323 | add_com ("up-silently", class_support, up_silently_command, _("\ |
| 3324 | Same as the `up' command, but does not print anything.\n\ |
| 3325 | This is useful in command scripts.")); |
| 3326 | |
| 3327 | add_com ("down", class_stack, down_command, _("\ |
| 3328 | Select and print stack frame called by this one.\n\ |
| 3329 | An argument says how many frames down to go.")); |
| 3330 | add_com_alias ("do", "down", class_stack, 1); |
| 3331 | add_com_alias ("dow", "down", class_stack, 1); |
| 3332 | add_com ("down-silently", class_support, down_silently_command, _("\ |
| 3333 | Same as the `down' command, but does not print anything.\n\ |
| 3334 | This is useful in command scripts.")); |
| 3335 | |
| 3336 | add_prefix_cmd ("frame", class_stack, |
| 3337 | &frame_cmd.base_command, _("\ |
| 3338 | Select and print a stack frame.\n\ |
| 3339 | With no argument, print the selected stack frame. (See also \"info frame\").\n\ |
| 3340 | A single numerical argument specifies the frame to select."), |
| 3341 | &frame_cmd_list, "frame ", 1, &cmdlist); |
| 3342 | add_com_alias ("f", "frame", class_stack, 1); |
| 3343 | |
| 3344 | #define FRAME_APPLY_OPTION_HELP "\ |
| 3345 | Prints the frame location information followed by COMMAND output.\n\ |
| 3346 | \n\ |
| 3347 | By default, an error raised during the execution of COMMAND\n\ |
| 3348 | aborts \"frame apply\".\n\ |
| 3349 | \n\ |
| 3350 | Options:\n\ |
| 3351 | %OPTIONS%" |
| 3352 | |
| 3353 | const auto frame_apply_opts |
| 3354 | = make_frame_apply_options_def_group (nullptr, nullptr); |
| 3355 | |
| 3356 | static std::string frame_apply_cmd_help = gdb::option::build_help (_("\ |
| 3357 | Apply a command to a number of frames.\n\ |
| 3358 | Usage: frame apply COUNT [OPTION]... COMMAND\n\ |
| 3359 | With a negative COUNT argument, applies the command on outermost -COUNT frames.\n" |
| 3360 | FRAME_APPLY_OPTION_HELP), |
| 3361 | frame_apply_opts); |
| 3362 | |
| 3363 | cmd = add_prefix_cmd ("apply", class_stack, frame_apply_command, |
| 3364 | frame_apply_cmd_help.c_str (), |
| 3365 | &frame_apply_cmd_list, "frame apply ", 1, |
| 3366 | &frame_cmd_list); |
| 3367 | set_cmd_completer_handle_brkchars (cmd, frame_apply_cmd_completer); |
| 3368 | |
| 3369 | static std::string frame_apply_all_cmd_help = gdb::option::build_help (_("\ |
| 3370 | Apply a command to all frames.\n\ |
| 3371 | \n\ |
| 3372 | Usage: frame apply all [OPTION]... COMMAND\n" |
| 3373 | FRAME_APPLY_OPTION_HELP), |
| 3374 | frame_apply_opts); |
| 3375 | |
| 3376 | cmd = add_cmd ("all", class_stack, frame_apply_all_command, |
| 3377 | frame_apply_all_cmd_help.c_str (), |
| 3378 | &frame_apply_cmd_list); |
| 3379 | set_cmd_completer_handle_brkchars (cmd, frame_apply_all_cmd_completer); |
| 3380 | |
| 3381 | static std::string frame_apply_level_cmd_help = gdb::option::build_help (_("\ |
| 3382 | Apply a command to a list of frames.\n\ |
| 3383 | \n\ |
| 3384 | Usage: frame apply level LEVEL... [OPTION]... COMMAND\n\ |
| 3385 | LEVEL is a space-separated list of levels of frames to apply COMMAND on.\n" |
| 3386 | FRAME_APPLY_OPTION_HELP), |
| 3387 | frame_apply_opts); |
| 3388 | |
| 3389 | cmd = add_cmd ("level", class_stack, frame_apply_level_command, |
| 3390 | frame_apply_level_cmd_help.c_str (), |
| 3391 | &frame_apply_cmd_list); |
| 3392 | set_cmd_completer_handle_brkchars (cmd, frame_apply_level_cmd_completer); |
| 3393 | |
| 3394 | cmd = add_com ("faas", class_stack, faas_command, _("\ |
| 3395 | Apply a command to all frames (ignoring errors and empty output).\n\ |
| 3396 | Usage: faas [OPTION]... COMMAND\n\ |
| 3397 | shortcut for 'frame apply all -s [OPTION]... COMMAND'\n\ |
| 3398 | See \"help frame apply all\" for available options.")); |
| 3399 | set_cmd_completer_handle_brkchars (cmd, frame_apply_all_cmd_completer); |
| 3400 | |
| 3401 | add_cmd ("address", class_stack, &frame_cmd.address, |
| 3402 | _("\ |
| 3403 | Select and print a stack frame by stack address.\n\ |
| 3404 | \n\ |
| 3405 | Usage: frame address STACK-ADDRESS"), |
| 3406 | &frame_cmd_list); |
| 3407 | |
| 3408 | add_cmd ("view", class_stack, &frame_cmd.view, |
| 3409 | _("\ |
| 3410 | View a stack frame that might be outside the current backtrace.\n\ |
| 3411 | \n\ |
| 3412 | Usage: frame view STACK-ADDRESS\n\ |
| 3413 | frame view STACK-ADDRESS PC-ADDRESS"), |
| 3414 | &frame_cmd_list); |
| 3415 | |
| 3416 | cmd = add_cmd ("function", class_stack, &frame_cmd.function, |
| 3417 | _("\ |
| 3418 | Select and print a stack frame by function name.\n\ |
| 3419 | \n\ |
| 3420 | Usage: frame function NAME\n\ |
| 3421 | \n\ |
| 3422 | The innermost frame that visited function NAME is selected."), |
| 3423 | &frame_cmd_list); |
| 3424 | set_cmd_completer (cmd, frame_selection_by_function_completer); |
| 3425 | |
| 3426 | |
| 3427 | add_cmd ("level", class_stack, &frame_cmd.level, |
| 3428 | _("\ |
| 3429 | Select and print a stack frame by level.\n\ |
| 3430 | \n\ |
| 3431 | Usage: frame level LEVEL"), |
| 3432 | &frame_cmd_list); |
| 3433 | |
| 3434 | cmd = add_prefix_cmd_suppress_notification ("select-frame", class_stack, |
| 3435 | &select_frame_cmd.base_command, _("\ |
| 3436 | Select a stack frame without printing anything.\n\ |
| 3437 | A single numerical argument specifies the frame to select."), |
| 3438 | &select_frame_cmd_list, "select-frame ", 1, &cmdlist, |
| 3439 | &cli_suppress_notification.user_selected_context); |
| 3440 | |
| 3441 | add_cmd_suppress_notification ("address", class_stack, |
| 3442 | &select_frame_cmd.address, _("\ |
| 3443 | Select a stack frame by stack address.\n\ |
| 3444 | \n\ |
| 3445 | Usage: select-frame address STACK-ADDRESS"), |
| 3446 | &select_frame_cmd_list, |
| 3447 | &cli_suppress_notification.user_selected_context); |
| 3448 | |
| 3449 | |
| 3450 | add_cmd_suppress_notification ("view", class_stack, |
| 3451 | &select_frame_cmd.view, _("\ |
| 3452 | Select a stack frame that might be outside the current backtrace.\n\ |
| 3453 | \n\ |
| 3454 | Usage: select-frame view STACK-ADDRESS\n\ |
| 3455 | select-frame view STACK-ADDRESS PC-ADDRESS"), |
| 3456 | &select_frame_cmd_list, |
| 3457 | &cli_suppress_notification.user_selected_context); |
| 3458 | |
| 3459 | cmd = add_cmd_suppress_notification ("function", class_stack, |
| 3460 | &select_frame_cmd.function, _("\ |
| 3461 | Select a stack frame by function name.\n\ |
| 3462 | \n\ |
| 3463 | Usage: select-frame function NAME"), |
| 3464 | &select_frame_cmd_list, |
| 3465 | &cli_suppress_notification.user_selected_context); |
| 3466 | set_cmd_completer (cmd, frame_selection_by_function_completer); |
| 3467 | |
| 3468 | add_cmd_suppress_notification ("level", class_stack, |
| 3469 | &select_frame_cmd.level, _("\ |
| 3470 | Select a stack frame by level.\n\ |
| 3471 | \n\ |
| 3472 | Usage: select-frame level LEVEL"), |
| 3473 | &select_frame_cmd_list, |
| 3474 | &cli_suppress_notification.user_selected_context); |
| 3475 | |
| 3476 | const auto backtrace_opts |
| 3477 | = make_backtrace_options_def_group (nullptr, nullptr, nullptr); |
| 3478 | |
| 3479 | static std::string backtrace_help |
| 3480 | = gdb::option::build_help (_("\ |
| 3481 | Print backtrace of all stack frames, or innermost COUNT frames.\n\ |
| 3482 | Usage: backtrace [OPTION]... [QUALIFIER]... [COUNT | -COUNT]\n\ |
| 3483 | \n\ |
| 3484 | Options:\n\ |
| 3485 | %OPTIONS%\n\ |
| 3486 | \n\ |
| 3487 | For backward compatibility, the following qualifiers are supported:\n\ |
| 3488 | \n\ |
| 3489 | full - same as -full option.\n\ |
| 3490 | no-filters - same as -no-filters option.\n\ |
| 3491 | hide - same as -hide.\n\ |
| 3492 | \n\ |
| 3493 | With a negative COUNT, print outermost -COUNT frames."), |
| 3494 | backtrace_opts); |
| 3495 | |
| 3496 | cmd_list_element *c = add_com ("backtrace", class_stack, |
| 3497 | backtrace_command, |
| 3498 | backtrace_help.c_str ()); |
| 3499 | set_cmd_completer_handle_brkchars (c, backtrace_command_completer); |
| 3500 | |
| 3501 | add_com_alias ("bt", "backtrace", class_stack, 0); |
| 3502 | |
| 3503 | add_com_alias ("where", "backtrace", class_stack, 0); |
| 3504 | add_info ("stack", backtrace_command, |
| 3505 | _("Backtrace of the stack, or innermost COUNT frames.")); |
| 3506 | add_info_alias ("s", "stack", 1); |
| 3507 | |
| 3508 | add_prefix_cmd ("frame", class_info, &info_frame_cmd.base_command, |
| 3509 | _("All about the selected stack frame.\n\ |
| 3510 | With no arguments, displays information about the currently selected stack\n\ |
| 3511 | frame. Alternatively a frame specification may be provided (See \"frame\")\n\ |
| 3512 | the information is then printed about the specified frame."), |
| 3513 | &info_frame_cmd_list, "info frame ", 1, &infolist); |
| 3514 | add_info_alias ("f", "frame", 1); |
| 3515 | |
| 3516 | add_cmd ("address", class_stack, &info_frame_cmd.address, |
| 3517 | _("\ |
| 3518 | Print information about a stack frame selected by stack address.\n\ |
| 3519 | \n\ |
| 3520 | Usage: info frame address STACK-ADDRESS"), |
| 3521 | &info_frame_cmd_list); |
| 3522 | |
| 3523 | add_cmd ("view", class_stack, &info_frame_cmd.view, |
| 3524 | _("\ |
| 3525 | Print information about a stack frame outside the current backtrace.\n\ |
| 3526 | \n\ |
| 3527 | Usage: info frame view STACK-ADDRESS\n\ |
| 3528 | info frame view STACK-ADDRESS PC-ADDRESS"), |
| 3529 | &info_frame_cmd_list); |
| 3530 | |
| 3531 | cmd = add_cmd ("function", class_stack, &info_frame_cmd.function, |
| 3532 | _("\ |
| 3533 | Print information about a stack frame selected by function name.\n\ |
| 3534 | \n\ |
| 3535 | Usage: info frame function NAME"), |
| 3536 | &info_frame_cmd_list); |
| 3537 | set_cmd_completer (cmd, frame_selection_by_function_completer); |
| 3538 | |
| 3539 | add_cmd ("level", class_stack, &info_frame_cmd.level, |
| 3540 | _("\ |
| 3541 | Print information about a stack frame selected by level.\n\ |
| 3542 | \n\ |
| 3543 | Usage: info frame level LEVEL"), |
| 3544 | &info_frame_cmd_list); |
| 3545 | |
| 3546 | cmd = add_info ("locals", info_locals_command, |
| 3547 | info_print_args_help (_("\ |
| 3548 | All local variables of current stack frame or those matching REGEXPs.\n\ |
| 3549 | Usage: info locals [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\ |
| 3550 | Prints the local variables of the current stack frame.\n"), |
| 3551 | _("local variables"), |
| 3552 | false)); |
| 3553 | set_cmd_completer_handle_brkchars (cmd, info_print_command_completer); |
| 3554 | cmd = add_info ("args", info_args_command, |
| 3555 | info_print_args_help (_("\ |
| 3556 | All argument variables of current stack frame or those matching REGEXPs.\n\ |
| 3557 | Usage: info args [-q] [-t TYPEREGEXP] [NAMEREGEXP]\n\ |
| 3558 | Prints the argument variables of the current stack frame.\n"), |
| 3559 | _("argument variables"), |
| 3560 | false)); |
| 3561 | set_cmd_completer_handle_brkchars (cmd, info_print_command_completer); |
| 3562 | |
| 3563 | if (dbx_commands) |
| 3564 | add_com ("func", class_stack, func_command, _("\ |
| 3565 | Select the stack frame that contains NAME.\n\ |
| 3566 | Usage: func NAME")); |
| 3567 | |
| 3568 | /* Install "set print raw frame-arguments", a deprecated spelling of |
| 3569 | "set print raw-frame-arguments". */ |
| 3570 | cmd = add_setshow_boolean_cmd |
| 3571 | ("frame-arguments", no_class, |
| 3572 | &user_frame_print_options.print_raw_frame_arguments, |
| 3573 | _("\ |
| 3574 | Set whether to print frame arguments in raw form."), _("\ |
| 3575 | Show whether to print frame arguments in raw form."), _("\ |
| 3576 | If set, frame arguments are printed in raw form, bypassing any\n\ |
| 3577 | pretty-printers for that value."), |
| 3578 | NULL, NULL, |
| 3579 | &setprintrawlist, &showprintrawlist); |
| 3580 | deprecate_cmd (cmd, "set print raw-frame-arguments"); |
| 3581 | |
| 3582 | add_setshow_auto_boolean_cmd ("disassemble-next-line", class_stack, |
| 3583 | &disassemble_next_line, _("\ |
| 3584 | Set whether to disassemble next source line or insn when execution stops."), |
| 3585 | _("\ |
| 3586 | Show whether to disassemble next source line or insn when execution stops."), |
| 3587 | _("\ |
| 3588 | If ON, GDB will display disassembly of the next source line, in addition\n\ |
| 3589 | to displaying the source line itself. If the next source line cannot\n\ |
| 3590 | be displayed (e.g., source is unavailable or there's no line info), GDB\n\ |
| 3591 | will display disassembly of next instruction instead of showing the\n\ |
| 3592 | source line.\n\ |
| 3593 | If AUTO, display disassembly of next instruction only if the source line\n\ |
| 3594 | cannot be displayed.\n\ |
| 3595 | If OFF (which is the default), never display the disassembly of the next\n\ |
| 3596 | source line."), |
| 3597 | NULL, |
| 3598 | show_disassemble_next_line, |
| 3599 | &setlist, &showlist); |
| 3600 | disassemble_next_line = AUTO_BOOLEAN_FALSE; |
| 3601 | |
| 3602 | gdb::option::add_setshow_cmds_for_options |
| 3603 | (class_stack, &user_frame_print_options, |
| 3604 | frame_print_option_defs, &setprintlist, &showprintlist); |
| 3605 | } |