1 /* Print and select stack frames for GDB, the GNU debugger.
3 Copyright (C) 1986-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
24 #include "expression.h"
31 #include "breakpoint.h"
38 #include "dictionary.h"
39 #include "exceptions.h"
40 #include "reggroups.h"
44 #include "gdbthread.h"
45 #include "cp-support.h"
47 #include "inline-frame.h"
49 #include "cli/cli-utils.h"
51 #include "gdb_assert.h"
53 #include "gdb_string.h"
58 void (*deprecated_selected_frame_level_changed_hook) (int);
60 /* The possible choices of "set print frame-arguments", and the value
63 static const char *const print_frame_arguments_choices[] =
64 {"all", "scalars", "none", NULL};
65 static const char *print_frame_arguments = "scalars";
67 /* The possible choices of "set print entry-values", and the value
70 const char print_entry_values_no[] = "no";
71 const char print_entry_values_only[] = "only";
72 const char print_entry_values_preferred[] = "preferred";
73 const char print_entry_values_if_needed[] = "if-needed";
74 const char print_entry_values_both[] = "both";
75 const char print_entry_values_compact[] = "compact";
76 const char print_entry_values_default[] = "default";
77 static const char *const print_entry_values_choices[] =
79 print_entry_values_no,
80 print_entry_values_only,
81 print_entry_values_preferred,
82 print_entry_values_if_needed,
83 print_entry_values_both,
84 print_entry_values_compact,
85 print_entry_values_default,
88 const char *print_entry_values = print_entry_values_default;
90 /* Prototypes for local functions. */
92 static void print_frame_local_vars (struct frame_info *, int,
95 static void print_frame (struct frame_info *frame, int print_level,
96 enum print_what print_what, int print_args,
97 struct symtab_and_line sal);
99 static void set_last_displayed_sal (int valid,
100 struct program_space *pspace,
102 struct symtab *symtab,
105 /* Zero means do things normally; we are interacting directly with the
106 user. One means print the full filename and linenumber when a
107 frame is printed, and do so in a format emacs18/emacs19.22 can
108 parse. Two means print similar annotations, but in many more
109 cases and in a slightly different syntax. */
111 int annotation_level = 0;
113 /* These variables hold the last symtab and line we displayed to the user.
114 * This is where we insert a breakpoint or a skiplist entry by default. */
115 static int last_displayed_sal_valid = 0;
116 static struct program_space *last_displayed_pspace = 0;
117 static CORE_ADDR last_displayed_addr = 0;
118 static struct symtab *last_displayed_symtab = 0;
119 static int last_displayed_line = 0;
122 /* Return 1 if we should display the address in addition to the location,
123 because we are in the middle of a statement. */
126 frame_show_address (struct frame_info *frame,
127 struct symtab_and_line sal)
129 /* If there is a line number, but no PC, then there is no location
130 information associated with this sal. The only way that should
131 happen is for the call sites of inlined functions (SAL comes from
132 find_frame_sal). Otherwise, we would have some PC range if the
133 SAL came from a line table. */
134 if (sal.line != 0 && sal.pc == 0 && sal.end == 0)
136 if (get_next_frame (frame) == NULL)
137 gdb_assert (inline_skipped_frames (inferior_ptid) > 0);
139 gdb_assert (get_frame_type (get_next_frame (frame)) == INLINE_FRAME);
143 return get_frame_pc (frame) != sal.pc;
146 /* Show or print a stack frame FRAME briefly. The output is format
147 according to PRINT_LEVEL and PRINT_WHAT printing the frame's
148 relative level, function name, argument list, and file name and
149 line number. If the frame's PC is not at the beginning of the
150 source line, the actual PC is printed at the beginning. */
153 print_stack_frame (struct frame_info *frame, int print_level,
154 enum print_what print_what)
156 volatile struct gdb_exception e;
158 /* For mi, alway print location and address. */
159 if (ui_out_is_mi_like_p (current_uiout))
160 print_what = LOC_AND_ADDRESS;
162 TRY_CATCH (e, RETURN_MASK_ERROR)
164 int center = (print_what == SRC_LINE || print_what == SRC_AND_LOC);
166 print_frame_info (frame, print_level, print_what, 1 /* print_args */);
167 set_current_sal_from_frame (frame, center);
171 /* Print nameless arguments of frame FRAME on STREAM, where START is
172 the offset of the first nameless argument, and NUM is the number of
173 nameless arguments to print. FIRST is nonzero if this is the first
174 argument (not just the first nameless argument). */
177 print_frame_nameless_args (struct frame_info *frame, long start, int num,
178 int first, struct ui_file *stream)
180 struct gdbarch *gdbarch = get_frame_arch (frame);
181 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
186 for (i = 0; i < num; i++)
189 argsaddr = get_frame_args_address (frame);
192 arg_value = read_memory_integer (argsaddr + start,
193 sizeof (int), byte_order);
195 fprintf_filtered (stream, ", ");
196 fprintf_filtered (stream, "%ld", arg_value);
198 start += sizeof (int);
202 /* Print single argument of inferior function. ARG must be already
205 Errors are printed as if they would be the parameter value. Use zeroed ARG
206 iff it should not be printed accoring to user settings. */
209 print_frame_arg (const struct frame_arg *arg)
211 struct ui_out *uiout = current_uiout;
212 volatile struct gdb_exception except;
213 struct cleanup *old_chain;
216 stb = mem_fileopen ();
217 old_chain = make_cleanup_ui_file_delete (stb);
219 gdb_assert (!arg->val || !arg->error);
220 gdb_assert (arg->entry_kind == print_entry_values_no
221 || arg->entry_kind == print_entry_values_only
222 || (!ui_out_is_mi_like_p (uiout)
223 && arg->entry_kind == print_entry_values_compact));
225 annotate_arg_begin ();
227 make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
228 fprintf_symbol_filtered (stb, SYMBOL_PRINT_NAME (arg->sym),
229 SYMBOL_LANGUAGE (arg->sym), DMGL_PARAMS | DMGL_ANSI);
230 if (arg->entry_kind == print_entry_values_compact)
232 /* It is OK to provide invalid MI-like stream as with
233 PRINT_ENTRY_VALUE_COMPACT we never use MI. */
234 fputs_filtered ("=", stb);
236 fprintf_symbol_filtered (stb, SYMBOL_PRINT_NAME (arg->sym),
237 SYMBOL_LANGUAGE (arg->sym),
238 DMGL_PARAMS | DMGL_ANSI);
240 if (arg->entry_kind == print_entry_values_only
241 || arg->entry_kind == print_entry_values_compact)
242 fputs_filtered ("@entry", stb);
243 ui_out_field_stream (uiout, "name", stb);
244 annotate_arg_name_end ();
245 ui_out_text (uiout, "=");
247 if (!arg->val && !arg->error)
248 ui_out_text (uiout, "...");
252 except.message = arg->error;
255 /* TRY_CATCH has two statements, wrap it in a block. */
257 TRY_CATCH (except, RETURN_MASK_ERROR)
259 const struct language_defn *language;
260 struct value_print_options opts;
262 /* Avoid value_print because it will deref ref parameters. We
263 just want to print their addresses. Print ??? for args whose
264 address we do not know. We pass 2 as "recurse" to val_print
265 because our standard indentation here is 4 spaces, and
266 val_print indents 2 for each recurse. */
268 annotate_arg_value (value_type (arg->val));
270 /* Use the appropriate language to display our symbol, unless the
271 user forced the language to a specific language. */
272 if (language_mode == language_mode_auto)
273 language = language_def (SYMBOL_LANGUAGE (arg->sym));
275 language = current_language;
277 get_raw_print_options (&opts);
280 /* True in "summary" mode, false otherwise. */
281 opts.summary = !strcmp (print_frame_arguments, "scalars");
283 common_val_print (arg->val, stb, 2, &opts, language);
287 fprintf_filtered (stb, _("<error reading variable: %s>"),
291 ui_out_field_stream (uiout, "value", stb);
293 /* Also invoke ui_out_tuple_end. */
294 do_cleanups (old_chain);
299 /* Read in inferior function parameter SYM at FRAME into ARGP. Caller is
300 responsible for xfree of ARGP->ERROR. This function never throws an
304 read_frame_arg (struct symbol *sym, struct frame_info *frame,
305 struct frame_arg *argp, struct frame_arg *entryargp)
307 struct value *val = NULL, *entryval = NULL;
308 char *val_error = NULL, *entryval_error = NULL;
310 volatile struct gdb_exception except;
312 if (print_entry_values != print_entry_values_only
313 && print_entry_values != print_entry_values_preferred)
315 TRY_CATCH (except, RETURN_MASK_ERROR)
317 val = read_var_value (sym, frame);
321 val_error = alloca (strlen (except.message) + 1);
322 strcpy (val_error, except.message);
326 if (SYMBOL_COMPUTED_OPS (sym) != NULL
327 && SYMBOL_COMPUTED_OPS (sym)->read_variable_at_entry != NULL
328 && print_entry_values != print_entry_values_no
329 && (print_entry_values != print_entry_values_if_needed
330 || !val || value_optimized_out (val)))
332 TRY_CATCH (except, RETURN_MASK_ERROR)
334 const struct symbol_computed_ops *ops;
336 ops = SYMBOL_COMPUTED_OPS (sym);
337 entryval = ops->read_variable_at_entry (sym, frame);
341 entryval_error = alloca (strlen (except.message) + 1);
342 strcpy (entryval_error, except.message);
345 if (except.error == NO_ENTRY_VALUE_ERROR
346 || (entryval && value_optimized_out (entryval)))
349 entryval_error = NULL;
352 if (print_entry_values == print_entry_values_compact
353 || print_entry_values == print_entry_values_default)
355 /* For MI do not try to use print_entry_values_compact for ARGP. */
357 if (val && entryval && !ui_out_is_mi_like_p (current_uiout))
359 struct type *type = value_type (val);
361 if (!value_optimized_out (val) && value_lazy (val))
362 value_fetch_lazy (val);
363 if (!value_optimized_out (val) && value_lazy (entryval))
364 value_fetch_lazy (entryval);
365 if (!value_optimized_out (val)
366 && value_available_contents_eq (val, 0, entryval, 0,
369 /* Initialize it just to avoid a GCC false warning. */
370 struct value *val_deref = NULL, *entryval_deref;
372 /* DW_AT_GNU_call_site_value does match with the current
373 value. If it is a reference still try to verify if
374 dereferenced DW_AT_GNU_call_site_data_value does not
377 TRY_CATCH (except, RETURN_MASK_ERROR)
379 struct type *type_deref;
381 val_deref = coerce_ref (val);
382 if (value_lazy (val_deref))
383 value_fetch_lazy (val_deref);
384 type_deref = value_type (val_deref);
386 entryval_deref = coerce_ref (entryval);
387 if (value_lazy (entryval_deref))
388 value_fetch_lazy (entryval_deref);
390 /* If the reference addresses match but dereferenced
391 content does not match print them. */
393 && value_available_contents_eq (val_deref, 0,
395 TYPE_LENGTH (type_deref)))
399 /* Value was not a reference; and its content matches. */
400 if (val == val_deref)
402 /* If the dereferenced content could not be fetched do not
404 else if (except.error == NO_ENTRY_VALUE_ERROR)
406 else if (except.message)
408 entryval_error = alloca (strlen (except.message) + 1);
409 strcpy (entryval_error, except.message);
417 /* Try to remove possibly duplicate error message for ENTRYARGP even
420 if (val_error && entryval_error
421 && strcmp (val_error, entryval_error) == 0)
423 entryval_error = NULL;
425 /* Do not se VAL_EQUAL as the same error message may be shown for
426 the entry value even if no entry values are present in the
432 if (entryval == NULL)
434 if (print_entry_values == print_entry_values_preferred)
436 TRY_CATCH (except, RETURN_MASK_ERROR)
438 val = read_var_value (sym, frame);
442 val_error = alloca (strlen (except.message) + 1);
443 strcpy (val_error, except.message);
446 if (print_entry_values == print_entry_values_only
447 || print_entry_values == print_entry_values_both
448 || (print_entry_values == print_entry_values_preferred
449 && (!val || value_optimized_out (val))))
450 entryval = allocate_optimized_out_value (SYMBOL_TYPE (sym));
452 if ((print_entry_values == print_entry_values_compact
453 || print_entry_values == print_entry_values_if_needed
454 || print_entry_values == print_entry_values_preferred)
455 && (!val || value_optimized_out (val)) && entryval != NULL)
463 argp->error = val_error ? xstrdup (val_error) : NULL;
464 if (!val && !val_error)
465 argp->entry_kind = print_entry_values_only;
466 else if ((print_entry_values == print_entry_values_compact
467 || print_entry_values == print_entry_values_default) && val_equal)
469 argp->entry_kind = print_entry_values_compact;
470 gdb_assert (!ui_out_is_mi_like_p (current_uiout));
473 argp->entry_kind = print_entry_values_no;
475 entryargp->sym = sym;
476 entryargp->val = entryval;
477 entryargp->error = entryval_error ? xstrdup (entryval_error) : NULL;
478 if (!entryval && !entryval_error)
479 entryargp->entry_kind = print_entry_values_no;
481 entryargp->entry_kind = print_entry_values_only;
484 /* Print the arguments of frame FRAME on STREAM, given the function
485 FUNC running in that frame (as a symbol), where NUM is the number
486 of arguments according to the stack frame (or -1 if the number of
487 arguments is unknown). */
489 /* Note that currently the "number of arguments according to the
490 stack frame" is only known on VAX where i refers to the "number of
491 ints of arguments according to the stack frame". */
494 print_frame_args (struct symbol *func, struct frame_info *frame,
495 int num, struct ui_file *stream)
497 struct ui_out *uiout = current_uiout;
499 /* Offset of next stack argument beyond the one we have seen that is
500 at the highest offset, or -1 if we haven't come to a stack
502 long highest_offset = -1;
503 /* Number of ints of arguments that we have printed so far. */
504 int args_printed = 0;
505 struct cleanup *old_chain;
507 /* True if we should print arguments, false otherwise. */
508 int print_args = strcmp (print_frame_arguments, "none");
510 stb = mem_fileopen ();
511 old_chain = make_cleanup_ui_file_delete (stb);
515 struct block *b = SYMBOL_BLOCK_VALUE (func);
516 struct block_iterator iter;
519 ALL_BLOCK_SYMBOLS (b, iter, sym)
521 struct frame_arg arg, entryarg;
525 /* Keep track of the highest stack argument offset seen, and
526 skip over any kinds of symbols we don't care about. */
528 if (!SYMBOL_IS_ARGUMENT (sym))
531 switch (SYMBOL_CLASS (sym))
536 long current_offset = SYMBOL_VALUE (sym);
537 int arg_size = TYPE_LENGTH (SYMBOL_TYPE (sym));
539 /* Compute address of next argument by adding the size of
540 this argument and rounding to an int boundary. */
542 ((current_offset + arg_size + sizeof (int) - 1)
543 & ~(sizeof (int) - 1));
545 /* If this is the highest offset seen yet, set
547 if (highest_offset == -1
548 || (current_offset > highest_offset))
549 highest_offset = current_offset;
551 /* Add the number of ints we're about to print to
553 args_printed += (arg_size + sizeof (int) - 1) / sizeof (int);
556 /* We care about types of symbols, but don't need to
557 keep track of stack offsets in them. */
559 case LOC_REGPARM_ADDR:
561 case LOC_OPTIMIZED_OUT:
566 /* We have to look up the symbol because arguments can have
567 two entries (one a parameter, one a local) and the one we
568 want is the local, which lookup_symbol will find for us.
569 This includes gcc1 (not gcc2) on SPARC when passing a
570 small structure and gcc2 when the argument type is float
571 and it is passed as a double and converted to float by
572 the prologue (in the latter case the type of the LOC_ARG
573 symbol is double and the type of the LOC_LOCAL symbol is
575 /* But if the parameter name is null, don't try it. Null
576 parameter names occur on the RS/6000, for traceback
577 tables. FIXME, should we even print them? */
579 if (*SYMBOL_LINKAGE_NAME (sym))
583 nsym = lookup_symbol (SYMBOL_LINKAGE_NAME (sym),
584 b, VAR_DOMAIN, NULL);
585 gdb_assert (nsym != NULL);
586 if (SYMBOL_CLASS (nsym) == LOC_REGISTER
587 && !SYMBOL_IS_ARGUMENT (nsym))
589 /* There is a LOC_ARG/LOC_REGISTER pair. This means
590 that it was passed on the stack and loaded into a
591 register, or passed in a register and stored in a
592 stack slot. GDB 3.x used the LOC_ARG; GDB
593 4.0-4.11 used the LOC_REGISTER.
595 Reasons for using the LOC_ARG:
597 (1) Because find_saved_registers may be slow for
600 (2) Because registers are often re-used and stack
601 slots rarely (never?) are. Therefore using
602 the stack slot is much less likely to print
605 Reasons why we might want to use the LOC_REGISTER:
607 (1) So that the backtrace prints the same value
608 as "print foo". I see no compelling reason
609 why this needs to be the case; having the
610 backtrace print the value which was passed
611 in, and "print foo" print the value as
612 modified within the called function, makes
615 Additional note: It might be nice if "info args"
616 displayed both values.
618 One more note: There is a case with SPARC
619 structure passing where we need to use the
620 LOC_REGISTER, but this is dealt with by creating
621 a single LOC_REGPARM in symbol reading. */
623 /* Leave sym (the LOC_ARG) alone. */
630 /* Print the current arg. */
632 ui_out_text (uiout, ", ");
633 ui_out_wrap_hint (uiout, " ");
637 memset (&arg, 0, sizeof (arg));
639 arg.entry_kind = print_entry_values_no;
640 memset (&entryarg, 0, sizeof (entryarg));
642 entryarg.entry_kind = print_entry_values_no;
645 read_frame_arg (sym, frame, &arg, &entryarg);
647 if (arg.entry_kind != print_entry_values_only)
648 print_frame_arg (&arg);
650 if (entryarg.entry_kind != print_entry_values_no)
652 if (arg.entry_kind != print_entry_values_only)
654 ui_out_text (uiout, ", ");
655 ui_out_wrap_hint (uiout, " ");
658 print_frame_arg (&entryarg);
662 xfree (entryarg.error);
668 /* Don't print nameless args in situations where we don't know
669 enough about the stack to find them. */
674 if (highest_offset == -1)
675 start = gdbarch_frame_args_skip (get_frame_arch (frame));
677 start = highest_offset;
679 print_frame_nameless_args (frame, start, num - args_printed,
683 do_cleanups (old_chain);
686 /* Set the current source and line to the location given by frame
687 FRAME, if possible. When CENTER is true, adjust so the relevant
688 line is in the center of the next 'list'. */
691 set_current_sal_from_frame (struct frame_info *frame, int center)
693 struct symtab_and_line sal;
695 find_frame_sal (frame, &sal);
699 sal.line = max (sal.line - get_lines_to_list () / 2, 1);
700 set_current_source_symtab_and_line (&sal);
704 /* If ON, GDB will display disassembly of the next source line when
705 execution of the program being debugged stops.
706 If AUTO (which is the default), or there's no line info to determine
707 the source line of the next instruction, display disassembly of next
708 instruction instead. */
710 static enum auto_boolean disassemble_next_line;
713 show_disassemble_next_line (struct ui_file *file, int from_tty,
714 struct cmd_list_element *c,
717 fprintf_filtered (file,
718 _("Debugger's willingness to use "
719 "disassemble-next-line is %s.\n"),
723 /* Use TRY_CATCH to catch the exception from the gdb_disassembly
724 because it will be broken by filter sometime. */
727 do_gdb_disassembly (struct gdbarch *gdbarch,
728 int how_many, CORE_ADDR low, CORE_ADDR high)
730 volatile struct gdb_exception exception;
732 TRY_CATCH (exception, RETURN_MASK_ERROR)
734 gdb_disassembly (gdbarch, current_uiout, 0,
735 DISASSEMBLY_RAW_INSN, how_many,
738 if (exception.reason < 0)
740 /* If an exception was thrown while doing the disassembly, print
741 the error message, to give the user a clue of what happened. */
742 exception_print (gdb_stderr, exception);
746 /* Print information about frame FRAME. The output is format according
747 to PRINT_LEVEL and PRINT_WHAT and PRINT_ARGS. The meaning of
750 SRC_LINE: Print only source line.
751 LOCATION: Print only location.
752 LOC_AND_SRC: Print location and source line.
754 Used in "where" output, and to emit breakpoint or step
758 print_frame_info (struct frame_info *frame, int print_level,
759 enum print_what print_what, int print_args)
761 struct gdbarch *gdbarch = get_frame_arch (frame);
762 struct symtab_and_line sal;
765 struct ui_out *uiout = current_uiout;
767 if (get_frame_type (frame) == DUMMY_FRAME
768 || get_frame_type (frame) == SIGTRAMP_FRAME
769 || get_frame_type (frame) == ARCH_FRAME)
771 struct cleanup *uiout_cleanup
772 = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
774 annotate_frame_begin (print_level ? frame_relative_level (frame) : 0,
775 gdbarch, get_frame_pc (frame));
777 /* Do this regardless of SOURCE because we don't have any source
778 to list for this frame. */
781 ui_out_text (uiout, "#");
782 ui_out_field_fmt_int (uiout, 2, ui_left, "level",
783 frame_relative_level (frame));
785 if (ui_out_is_mi_like_p (uiout))
787 annotate_frame_address ();
788 ui_out_field_core_addr (uiout, "addr",
789 gdbarch, get_frame_pc (frame));
790 annotate_frame_address_end ();
793 if (get_frame_type (frame) == DUMMY_FRAME)
795 annotate_function_call ();
796 ui_out_field_string (uiout, "func", "<function called from gdb>");
798 else if (get_frame_type (frame) == SIGTRAMP_FRAME)
800 annotate_signal_handler_caller ();
801 ui_out_field_string (uiout, "func", "<signal handler called>");
803 else if (get_frame_type (frame) == ARCH_FRAME)
805 ui_out_field_string (uiout, "func", "<cross-architecture call>");
807 ui_out_text (uiout, "\n");
808 annotate_frame_end ();
810 do_cleanups (uiout_cleanup);
814 /* If FRAME is not the innermost frame, that normally means that
815 FRAME->pc points to *after* the call instruction, and we want to
816 get the line containing the call, never the next line. But if
817 the next frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the
818 next frame was not entered as the result of a call, and we want
819 to get the line containing FRAME->pc. */
820 find_frame_sal (frame, &sal);
822 location_print = (print_what == LOCATION
823 || print_what == LOC_AND_ADDRESS
824 || print_what == SRC_AND_LOC);
826 if (location_print || !sal.symtab)
827 print_frame (frame, print_level, print_what, print_args, sal);
829 source_print = (print_what == SRC_LINE || print_what == SRC_AND_LOC);
831 /* If disassemble-next-line is set to auto or on and doesn't have
832 the line debug messages for $pc, output the next instruction. */
833 if ((disassemble_next_line == AUTO_BOOLEAN_AUTO
834 || disassemble_next_line == AUTO_BOOLEAN_TRUE)
835 && source_print && !sal.symtab)
836 do_gdb_disassembly (get_frame_arch (frame), 1,
837 get_frame_pc (frame), get_frame_pc (frame) + 1);
839 if (source_print && sal.symtab)
842 int mid_statement = ((print_what == SRC_LINE)
843 && frame_show_address (frame, sal));
845 if (annotation_level)
846 done = identify_source_line (sal.symtab, sal.line, mid_statement,
847 get_frame_pc (frame));
850 if (deprecated_print_frame_info_listing_hook)
851 deprecated_print_frame_info_listing_hook (sal.symtab,
856 struct value_print_options opts;
858 get_user_print_options (&opts);
859 /* We used to do this earlier, but that is clearly
860 wrong. This function is used by many different
861 parts of gdb, including normal_stop in infrun.c,
862 which uses this to print out the current PC
863 when we stepi/nexti into the middle of a source
864 line. Only the command line really wants this
865 behavior. Other UIs probably would like the
866 ability to decide for themselves if it is desired. */
867 if (opts.addressprint && mid_statement)
869 ui_out_field_core_addr (uiout, "addr",
870 gdbarch, get_frame_pc (frame));
871 ui_out_text (uiout, "\t");
874 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
878 /* If disassemble-next-line is set to on and there is line debug
879 messages, output assembly codes for next line. */
880 if (disassemble_next_line == AUTO_BOOLEAN_TRUE)
881 do_gdb_disassembly (get_frame_arch (frame), -1, sal.pc, sal.end);
884 if (print_what != LOCATION)
888 if (get_frame_pc_if_available (frame, &pc))
889 set_last_displayed_sal (1, sal.pspace, pc, sal.symtab, sal.line);
891 set_last_displayed_sal (0, 0, 0, 0, 0);
894 annotate_frame_end ();
896 gdb_flush (gdb_stdout);
899 /* Remember the last symtab and line we displayed, which we use e.g.
900 * as the place to put a breakpoint when the `break' command is
901 * invoked with no arguments. */
904 set_last_displayed_sal (int valid, struct program_space *pspace,
905 CORE_ADDR addr, struct symtab *symtab,
908 last_displayed_sal_valid = valid;
909 last_displayed_pspace = pspace;
910 last_displayed_addr = addr;
911 last_displayed_symtab = symtab;
912 last_displayed_line = line;
913 if (valid && pspace == NULL)
915 clear_last_displayed_sal ();
916 internal_error (__FILE__, __LINE__,
917 _("Trying to set NULL pspace."));
921 /* Forget the last sal we displayed. */
924 clear_last_displayed_sal (void)
926 last_displayed_sal_valid = 0;
927 last_displayed_pspace = 0;
928 last_displayed_addr = 0;
929 last_displayed_symtab = 0;
930 last_displayed_line = 0;
933 /* Is our record of the last sal we displayed valid? If not,
934 * the get_last_displayed_* functions will return NULL or 0, as
938 last_displayed_sal_is_valid (void)
940 return last_displayed_sal_valid;
943 /* Get the pspace of the last sal we displayed, if it's valid. */
945 struct program_space *
946 get_last_displayed_pspace (void)
948 if (last_displayed_sal_valid)
949 return last_displayed_pspace;
953 /* Get the address of the last sal we displayed, if it's valid. */
956 get_last_displayed_addr (void)
958 if (last_displayed_sal_valid)
959 return last_displayed_addr;
963 /* Get the symtab of the last sal we displayed, if it's valid. */
966 get_last_displayed_symtab (void)
968 if (last_displayed_sal_valid)
969 return last_displayed_symtab;
973 /* Get the line of the last sal we displayed, if it's valid. */
976 get_last_displayed_line (void)
978 if (last_displayed_sal_valid)
979 return last_displayed_line;
983 /* Get the last sal we displayed, if it's valid. */
986 get_last_displayed_sal (struct symtab_and_line *sal)
988 if (last_displayed_sal_valid)
990 sal->pspace = last_displayed_pspace;
991 sal->pc = last_displayed_addr;
992 sal->symtab = last_displayed_symtab;
993 sal->line = last_displayed_line;
1005 /* Attempt to obtain the FUNNAME, FUNLANG and optionally FUNCP of the function
1006 corresponding to FRAME. */
1009 find_frame_funname (struct frame_info *frame, const char **funname,
1010 enum language *funlang, struct symbol **funcp)
1012 struct symbol *func;
1015 *funlang = language_unknown;
1019 func = get_frame_function (frame);
1022 /* In certain pathological cases, the symtabs give the wrong
1023 function (when we are in the first function in a file which
1024 is compiled without debugging symbols, the previous function
1025 is compiled with debugging symbols, and the "foo.o" symbol
1026 that is supposed to tell us where the file with debugging
1027 symbols ends has been truncated by ar because it is longer
1028 than 15 characters). This also occurs if the user uses asm()
1029 to create a function but not stabs for it (in a file compiled
1032 So look in the minimal symbol tables as well, and if it comes
1033 up with a larger address for the function use that instead.
1034 I don't think this can ever cause any problems; there
1035 shouldn't be any minimal symbols in the middle of a function;
1036 if this is ever changed many parts of GDB will need to be
1037 changed (and we'll create a find_pc_minimal_function or some
1040 struct bound_minimal_symbol msymbol;
1042 /* Don't attempt to do this for inlined functions, which do not
1043 have a corresponding minimal symbol. */
1044 if (!block_inlined_p (SYMBOL_BLOCK_VALUE (func)))
1046 = lookup_minimal_symbol_by_pc (get_frame_address_in_block (frame));
1048 memset (&msymbol, 0, sizeof (msymbol));
1050 if (msymbol.minsym != NULL
1051 && (SYMBOL_VALUE_ADDRESS (msymbol.minsym)
1052 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
1054 /* We also don't know anything about the function besides
1055 its address and name. */
1057 *funname = SYMBOL_PRINT_NAME (msymbol.minsym);
1058 *funlang = SYMBOL_LANGUAGE (msymbol.minsym);
1062 *funname = SYMBOL_PRINT_NAME (func);
1063 *funlang = SYMBOL_LANGUAGE (func);
1066 if (*funlang == language_cplus)
1068 /* It seems appropriate to use SYMBOL_PRINT_NAME() here,
1069 to display the demangled name that we already have
1070 stored in the symbol table, but we stored a version
1071 with DMGL_PARAMS turned on, and here we don't want to
1072 display parameters. So remove the parameters. */
1073 char *func_only = cp_remove_params (*funname);
1077 *funname = func_only;
1078 make_cleanup (xfree, func_only);
1085 struct bound_minimal_symbol msymbol;
1088 if (!get_frame_address_in_block_if_available (frame, &pc))
1091 msymbol = lookup_minimal_symbol_by_pc (pc);
1092 if (msymbol.minsym != NULL)
1094 *funname = SYMBOL_PRINT_NAME (msymbol.minsym);
1095 *funlang = SYMBOL_LANGUAGE (msymbol.minsym);
1101 print_frame (struct frame_info *frame, int print_level,
1102 enum print_what print_what, int print_args,
1103 struct symtab_and_line sal)
1105 struct gdbarch *gdbarch = get_frame_arch (frame);
1106 struct ui_out *uiout = current_uiout;
1107 const char *funname = NULL;
1108 enum language funlang = language_unknown;
1109 struct ui_file *stb;
1110 struct cleanup *old_chain, *list_chain;
1111 struct value_print_options opts;
1112 struct symbol *func;
1116 pc_p = get_frame_pc_if_available (frame, &pc);
1118 stb = mem_fileopen ();
1119 old_chain = make_cleanup_ui_file_delete (stb);
1121 find_frame_funname (frame, &funname, &funlang, &func);
1123 annotate_frame_begin (print_level ? frame_relative_level (frame) : 0,
1126 list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
1130 ui_out_text (uiout, "#");
1131 ui_out_field_fmt_int (uiout, 2, ui_left, "level",
1132 frame_relative_level (frame));
1134 get_user_print_options (&opts);
1135 if (opts.addressprint)
1137 || frame_show_address (frame, sal)
1138 || print_what == LOC_AND_ADDRESS)
1140 annotate_frame_address ();
1142 ui_out_field_core_addr (uiout, "addr", gdbarch, pc);
1144 ui_out_field_string (uiout, "addr", "<unavailable>");
1145 annotate_frame_address_end ();
1146 ui_out_text (uiout, " in ");
1148 annotate_frame_function_name ();
1149 fprintf_symbol_filtered (stb, funname ? funname : "??",
1150 funlang, DMGL_ANSI);
1151 ui_out_field_stream (uiout, "func", stb);
1152 ui_out_wrap_hint (uiout, " ");
1153 annotate_frame_args ();
1155 ui_out_text (uiout, " (");
1158 struct gdbarch *gdbarch = get_frame_arch (frame);
1160 struct cleanup *args_list_chain;
1161 volatile struct gdb_exception e;
1163 if (gdbarch_frame_num_args_p (gdbarch))
1165 numargs = gdbarch_frame_num_args (gdbarch, frame);
1166 gdb_assert (numargs >= 0);
1171 args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args");
1172 TRY_CATCH (e, RETURN_MASK_ERROR)
1174 print_frame_args (func, frame, numargs, gdb_stdout);
1176 /* FIXME: ARGS must be a list. If one argument is a string it
1177 will have " that will not be properly escaped. */
1178 /* Invoke ui_out_tuple_end. */
1179 do_cleanups (args_list_chain);
1182 ui_out_text (uiout, ")");
1185 const char *filename_display;
1187 filename_display = symtab_to_filename_for_display (sal.symtab);
1188 annotate_frame_source_begin ();
1189 ui_out_wrap_hint (uiout, " ");
1190 ui_out_text (uiout, " at ");
1191 annotate_frame_source_file ();
1192 ui_out_field_string (uiout, "file", filename_display);
1193 if (ui_out_is_mi_like_p (uiout))
1195 const char *fullname = symtab_to_fullname (sal.symtab);
1197 ui_out_field_string (uiout, "fullname", fullname);
1199 annotate_frame_source_file_end ();
1200 ui_out_text (uiout, ":");
1201 annotate_frame_source_line ();
1202 ui_out_field_int (uiout, "line", sal.line);
1203 annotate_frame_source_end ();
1206 if (pc_p && (funname == NULL || sal.symtab == NULL))
1209 char *lib = PC_SOLIB (get_frame_pc (frame));
1211 char *lib = solib_name_from_address (get_frame_program_space (frame),
1212 get_frame_pc (frame));
1216 annotate_frame_where ();
1217 ui_out_wrap_hint (uiout, " ");
1218 ui_out_text (uiout, " from ");
1219 ui_out_field_string (uiout, "from", lib);
1223 /* do_cleanups will call ui_out_tuple_end() for us. */
1224 do_cleanups (list_chain);
1225 ui_out_text (uiout, "\n");
1226 do_cleanups (old_chain);
1230 /* Read a frame specification in whatever the appropriate format is
1231 from FRAME_EXP. Call error(), printing MESSAGE, if the
1232 specification is in any way invalid (so this function never returns
1233 NULL). When SEPECTED_P is non-NULL set its target to indicate that
1234 the default selected frame was used. */
1236 static struct frame_info *
1237 parse_frame_specification_1 (const char *frame_exp, const char *message,
1238 int *selected_frame_p)
1241 struct value *args[4];
1242 CORE_ADDR addrs[ARRAY_SIZE (args)];
1244 if (frame_exp == NULL)
1252 struct cleanup *cleanup;
1255 /* Skip leading white space, bail of EOL. */
1256 frame_exp = skip_spaces_const (frame_exp);
1260 /* Parse the argument, extract it, save it. */
1262 *p && !isspace (*p);
1264 addr_string = savestring (frame_exp, p - frame_exp);
1266 cleanup = make_cleanup (xfree, addr_string);
1268 /* NOTE: Parse and evaluate expression, but do not use
1269 functions such as parse_and_eval_long or
1270 parse_and_eval_address to also extract the value.
1271 Instead value_as_long and value_as_address are used.
1272 This avoids problems with expressions that contain
1274 if (numargs >= ARRAY_SIZE (args))
1275 error (_("Too many args in frame specification"));
1276 args[numargs++] = parse_and_eval (addr_string);
1278 do_cleanups (cleanup);
1282 /* If no args, default to the selected frame. */
1285 if (selected_frame_p != NULL)
1286 (*selected_frame_p) = 1;
1287 return get_selected_frame (message);
1290 /* None of the remaining use the selected frame. */
1291 if (selected_frame_p != NULL)
1292 (*selected_frame_p) = 0;
1294 /* Assume the single arg[0] is an integer, and try using that to
1295 select a frame relative to current. */
1298 struct frame_info *fid;
1299 int level = value_as_long (args[0]);
1301 fid = find_relative_frame (get_current_frame (), &level);
1303 /* find_relative_frame was successful. */
1307 /* Convert each value into a corresponding address. */
1311 for (i = 0; i < numargs; i++)
1312 addrs[i] = value_as_address (args[i]);
1315 /* Assume that the single arg[0] is an address, use that to identify
1316 a frame with a matching ID. Should this also accept stack/pc or
1317 stack/pc/special. */
1320 struct frame_id id = frame_id_build_wild (addrs[0]);
1321 struct frame_info *fid;
1323 /* If (s)he specifies the frame with an address, he deserves
1324 what (s)he gets. Still, give the highest one that matches.
1325 (NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't
1327 for (fid = get_current_frame ();
1329 fid = get_prev_frame (fid))
1331 if (frame_id_eq (id, get_frame_id (fid)))
1333 struct frame_info *prev_frame;
1337 prev_frame = get_prev_frame (fid);
1339 || !frame_id_eq (id, get_frame_id (prev_frame)))
1348 /* We couldn't identify the frame as an existing frame, but
1349 perhaps we can create one with a single argument. */
1351 return create_new_frame (addrs[0], 0);
1352 else if (numargs == 2)
1353 return create_new_frame (addrs[0], addrs[1]);
1355 error (_("Too many args in frame specification"));
1358 static struct frame_info *
1359 parse_frame_specification (char *frame_exp)
1361 return parse_frame_specification_1 (frame_exp, NULL, NULL);
1364 /* Print verbosely the selected frame or the frame at address
1365 ADDR_EXP. Absolutely all information in the frame is printed. */
1368 frame_info (char *addr_exp, int from_tty)
1370 struct frame_info *fi;
1371 struct symtab_and_line sal;
1372 struct symbol *func;
1374 struct frame_info *calling_frame_info;
1376 const char *funname = 0;
1377 enum language funlang = language_unknown;
1378 const char *pc_regname;
1379 int selected_frame_p;
1380 struct gdbarch *gdbarch;
1381 struct cleanup *back_to = make_cleanup (null_cleanup, NULL);
1384 CORE_ADDR caller_pc;
1386 fi = parse_frame_specification_1 (addr_exp, "No stack.", &selected_frame_p);
1387 gdbarch = get_frame_arch (fi);
1389 /* Name of the value returned by get_frame_pc(). Per comments, "pc"
1390 is not a good name. */
1391 if (gdbarch_pc_regnum (gdbarch) >= 0)
1392 /* OK, this is weird. The gdbarch_pc_regnum hardware register's value can
1393 easily not match that of the internal value returned by
1395 pc_regname = gdbarch_register_name (gdbarch, gdbarch_pc_regnum (gdbarch));
1397 /* But then, this is weird to. Even without gdbarch_pc_regnum, an
1398 architectures will often have a hardware register called "pc",
1399 and that register's value, again, can easily not match
1403 frame_pc_p = get_frame_pc_if_available (fi, &frame_pc);
1404 find_frame_sal (fi, &sal);
1405 func = get_frame_function (fi);
1409 funname = SYMBOL_PRINT_NAME (func);
1410 funlang = SYMBOL_LANGUAGE (func);
1411 if (funlang == language_cplus)
1413 /* It seems appropriate to use SYMBOL_PRINT_NAME() here,
1414 to display the demangled name that we already have
1415 stored in the symbol table, but we stored a version
1416 with DMGL_PARAMS turned on, and here we don't want to
1417 display parameters. So remove the parameters. */
1418 char *func_only = cp_remove_params (funname);
1422 funname = func_only;
1423 make_cleanup (xfree, func_only);
1427 else if (frame_pc_p)
1429 struct bound_minimal_symbol msymbol;
1431 msymbol = lookup_minimal_symbol_by_pc (frame_pc);
1432 if (msymbol.minsym != NULL)
1434 funname = SYMBOL_PRINT_NAME (msymbol.minsym);
1435 funlang = SYMBOL_LANGUAGE (msymbol.minsym);
1438 calling_frame_info = get_prev_frame (fi);
1440 if (selected_frame_p && frame_relative_level (fi) >= 0)
1442 printf_filtered (_("Stack level %d, frame at "),
1443 frame_relative_level (fi));
1447 printf_filtered (_("Stack frame at "));
1449 fputs_filtered (paddress (gdbarch, get_frame_base (fi)), gdb_stdout);
1450 printf_filtered (":\n");
1451 printf_filtered (" %s = ", pc_regname);
1453 fputs_filtered (paddress (gdbarch, get_frame_pc (fi)), gdb_stdout);
1455 fputs_filtered ("<unavailable>", gdb_stdout);
1460 printf_filtered (" in ");
1461 fprintf_symbol_filtered (gdb_stdout, funname, funlang,
1462 DMGL_ANSI | DMGL_PARAMS);
1466 printf_filtered (" (%s:%d)", symtab_to_filename_for_display (sal.symtab),
1468 puts_filtered ("; ");
1470 printf_filtered ("saved %s ", pc_regname);
1471 if (frame_unwind_caller_pc_if_available (fi, &caller_pc))
1472 fputs_filtered (paddress (gdbarch, caller_pc), gdb_stdout);
1474 fputs_filtered ("<unavailable>", gdb_stdout);
1475 printf_filtered ("\n");
1477 if (calling_frame_info == NULL)
1479 enum unwind_stop_reason reason;
1481 reason = get_frame_unwind_stop_reason (fi);
1482 if (reason != UNWIND_NO_REASON)
1483 printf_filtered (_(" Outermost frame: %s\n"),
1484 frame_stop_reason_string (reason));
1486 else if (get_frame_type (fi) == TAILCALL_FRAME)
1487 puts_filtered (" tail call frame");
1488 else if (get_frame_type (fi) == INLINE_FRAME)
1489 printf_filtered (" inlined into frame %d",
1490 frame_relative_level (get_prev_frame (fi)));
1493 printf_filtered (" called by frame at ");
1494 fputs_filtered (paddress (gdbarch, get_frame_base (calling_frame_info)),
1497 if (get_next_frame (fi) && calling_frame_info)
1498 puts_filtered (",");
1500 if (get_next_frame (fi))
1502 printf_filtered (" caller of frame at ");
1503 fputs_filtered (paddress (gdbarch, get_frame_base (get_next_frame (fi))),
1506 if (get_next_frame (fi) || calling_frame_info)
1507 puts_filtered ("\n");
1510 printf_filtered (" source language %s.\n",
1511 language_str (s->language));
1514 /* Address of the argument list for this frame, or 0. */
1515 CORE_ADDR arg_list = get_frame_args_address (fi);
1516 /* Number of args for this frame, or -1 if unknown. */
1520 printf_filtered (" Arglist at unknown address.\n");
1523 printf_filtered (" Arglist at ");
1524 fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout);
1525 printf_filtered (",");
1527 if (!gdbarch_frame_num_args_p (gdbarch))
1530 puts_filtered (" args: ");
1534 numargs = gdbarch_frame_num_args (gdbarch, fi);
1535 gdb_assert (numargs >= 0);
1537 puts_filtered (" no args.");
1538 else if (numargs == 1)
1539 puts_filtered (" 1 arg: ");
1541 printf_filtered (" %d args: ", numargs);
1543 print_frame_args (func, fi, numargs, gdb_stdout);
1544 puts_filtered ("\n");
1548 /* Address of the local variables for this frame, or 0. */
1549 CORE_ADDR arg_list = get_frame_locals_address (fi);
1552 printf_filtered (" Locals at unknown address,");
1555 printf_filtered (" Locals at ");
1556 fputs_filtered (paddress (gdbarch, arg_list), gdb_stdout);
1557 printf_filtered (",");
1561 /* Print as much information as possible on the location of all the
1564 enum lval_type lval;
1573 /* The sp is special; what's displayed isn't the save address, but
1574 the value of the previous frame's sp. This is a legacy thing,
1575 at one stage the frame cached the previous frame's SP instead
1576 of its address, hence it was easiest to just display the cached
1578 if (gdbarch_sp_regnum (gdbarch) >= 0)
1580 /* Find out the location of the saved stack pointer with out
1581 actually evaluating it. */
1582 frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch),
1583 &optimized, &unavailable, &lval, &addr,
1585 if (!optimized && !unavailable && lval == not_lval)
1587 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1588 int sp_size = register_size (gdbarch, gdbarch_sp_regnum (gdbarch));
1589 gdb_byte value[MAX_REGISTER_SIZE];
1592 frame_register_unwind (fi, gdbarch_sp_regnum (gdbarch),
1593 &optimized, &unavailable, &lval, &addr,
1595 /* NOTE: cagney/2003-05-22: This is assuming that the
1596 stack pointer was packed as an unsigned integer. That
1597 may or may not be valid. */
1598 sp = extract_unsigned_integer (value, sp_size, byte_order);
1599 printf_filtered (" Previous frame's sp is ");
1600 fputs_filtered (paddress (gdbarch, sp), gdb_stdout);
1601 printf_filtered ("\n");
1604 else if (!optimized && !unavailable && lval == lval_memory)
1606 printf_filtered (" Previous frame's sp at ");
1607 fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
1608 printf_filtered ("\n");
1611 else if (!optimized && !unavailable && lval == lval_register)
1613 printf_filtered (" Previous frame's sp in %s\n",
1614 gdbarch_register_name (gdbarch, realnum));
1617 /* else keep quiet. */
1621 numregs = gdbarch_num_regs (gdbarch)
1622 + gdbarch_num_pseudo_regs (gdbarch);
1623 for (i = 0; i < numregs; i++)
1624 if (i != gdbarch_sp_regnum (gdbarch)
1625 && gdbarch_register_reggroup_p (gdbarch, i, all_reggroup))
1627 /* Find out the location of the saved register without
1628 fetching the corresponding value. */
1629 frame_register_unwind (fi, i, &optimized, &unavailable,
1630 &lval, &addr, &realnum, NULL);
1631 /* For moment, only display registers that were saved on the
1633 if (!optimized && !unavailable && lval == lval_memory)
1636 puts_filtered (" Saved registers:\n ");
1638 puts_filtered (",");
1640 printf_filtered (" %s at ",
1641 gdbarch_register_name (gdbarch, i));
1642 fputs_filtered (paddress (gdbarch, addr), gdb_stdout);
1646 if (count || need_nl)
1647 puts_filtered ("\n");
1650 do_cleanups (back_to);
1653 /* Print briefly all stack frames or just the innermost COUNT_EXP
1657 backtrace_command_1 (char *count_exp, int show_locals, int from_tty)
1659 struct frame_info *fi;
1662 struct frame_info *trailing;
1665 if (!target_has_stack)
1666 error (_("No stack."));
1668 /* The following code must do two things. First, it must set the
1669 variable TRAILING to the frame from which we should start
1670 printing. Second, it must set the variable count to the number
1671 of frames which we should print, or -1 if all of them. */
1672 trailing = get_current_frame ();
1677 count = parse_and_eval_long (count_exp);
1680 struct frame_info *current;
1685 while (current && count--)
1688 current = get_prev_frame (current);
1691 /* Will stop when CURRENT reaches the top of the stack.
1692 TRAILING will be COUNT below it. */
1696 trailing = get_prev_frame (trailing);
1697 current = get_prev_frame (current);
1709 /* Read in symbols for all of the frames. Need to do this in a
1710 separate pass so that "Reading in symbols for xxx" messages
1711 don't screw up the appearance of the backtrace. Also if
1712 people have strong opinions against reading symbols for
1713 backtrace this may have to be an option. */
1715 for (fi = trailing; fi != NULL && i--; fi = get_prev_frame (fi))
1720 pc = get_frame_address_in_block (fi);
1721 find_pc_sect_symtab_via_partial (pc, find_pc_mapped_section (pc));
1725 for (i = 0, fi = trailing; fi && count--; i++, fi = get_prev_frame (fi))
1729 /* Don't use print_stack_frame; if an error() occurs it probably
1730 means further attempts to backtrace would fail (on the other
1731 hand, perhaps the code does or could be fixed to make sure
1732 the frame->prev field gets set to NULL in that case). */
1733 print_frame_info (fi, 1, LOCATION, 1);
1736 struct frame_id frame_id = get_frame_id (fi);
1738 print_frame_local_vars (fi, 1, gdb_stdout);
1740 /* print_frame_local_vars invalidates FI. */
1741 fi = frame_find_by_id (frame_id);
1745 warning (_("Unable to restore previously selected frame."));
1750 /* Save the last frame to check for error conditions. */
1754 /* If we've stopped before the end, mention that. */
1756 printf_filtered (_("(More stack frames follow...)\n"));
1758 /* If we've run out of frames, and the reason appears to be an error
1759 condition, print it. */
1760 if (fi == NULL && trailing != NULL)
1762 enum unwind_stop_reason reason;
1764 reason = get_frame_unwind_stop_reason (trailing);
1765 if (reason >= UNWIND_FIRST_ERROR)
1766 printf_filtered (_("Backtrace stopped: %s\n"),
1767 frame_stop_reason_string (reason));
1772 backtrace_command (char *arg, int from_tty)
1774 struct cleanup *old_chain = make_cleanup (null_cleanup, NULL);
1775 int fulltrace_arg = -1, arglen = 0, argc = 0;
1782 argv = gdb_buildargv (arg);
1783 make_cleanup_freeargv (argv);
1785 for (i = 0; argv[i]; i++)
1789 for (j = 0; j < strlen (argv[i]); j++)
1790 argv[i][j] = tolower (argv[i][j]);
1792 if (fulltrace_arg < 0 && subset_compare (argv[i], "full"))
1793 fulltrace_arg = argc;
1796 arglen += strlen (argv[i]);
1801 if (fulltrace_arg >= 0)
1805 arg = xmalloc (arglen + 1);
1806 make_cleanup (xfree, arg);
1808 for (i = 0; i < (argc + 1); i++)
1810 if (i != fulltrace_arg)
1812 strcat (arg, argv[i]);
1822 backtrace_command_1 (arg, fulltrace_arg >= 0 /* show_locals */, from_tty);
1824 do_cleanups (old_chain);
1828 backtrace_full_command (char *arg, int from_tty)
1830 backtrace_command_1 (arg, 1 /* show_locals */, from_tty);
1834 /* Iterate over the local variables of a block B, calling CB with
1838 iterate_over_block_locals (struct block *b,
1839 iterate_over_block_arg_local_vars_cb cb,
1842 struct block_iterator iter;
1845 ALL_BLOCK_SYMBOLS (b, iter, sym)
1847 switch (SYMBOL_CLASS (sym))
1853 if (SYMBOL_IS_ARGUMENT (sym))
1855 if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN)
1857 (*cb) (SYMBOL_PRINT_NAME (sym), sym, cb_data);
1861 /* Ignore symbols which are not locals. */
1868 /* Same, but print labels. */
1871 /* Commented out, as the code using this function has also been
1872 commented out. FIXME:brobecker/2009-01-13: Find out why the code
1873 was commented out in the first place. The discussion introducing
1874 this change (2007-12-04: Support lexical blocks and function bodies
1875 that occupy non-contiguous address ranges) did not explain why
1876 this change was made. */
1878 print_block_frame_labels (struct gdbarch *gdbarch, struct block *b,
1879 int *have_default, struct ui_file *stream)
1881 struct block_iterator iter;
1883 int values_printed = 0;
1885 ALL_BLOCK_SYMBOLS (b, iter, sym)
1887 if (strcmp (SYMBOL_LINKAGE_NAME (sym), "default") == 0)
1893 if (SYMBOL_CLASS (sym) == LOC_LABEL)
1895 struct symtab_and_line sal;
1896 struct value_print_options opts;
1898 sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
1900 fputs_filtered (SYMBOL_PRINT_NAME (sym), stream);
1901 get_user_print_options (&opts);
1902 if (opts.addressprint)
1904 fprintf_filtered (stream, " ");
1905 fputs_filtered (paddress (gdbarch, SYMBOL_VALUE_ADDRESS (sym)),
1908 fprintf_filtered (stream, " in file %s, line %d\n",
1909 sal.symtab->filename, sal.line);
1913 return values_printed;
1917 /* Iterate over all the local variables in block B, including all its
1918 superblocks, stopping when the top-level block is reached. */
1921 iterate_over_block_local_vars (struct block *block,
1922 iterate_over_block_arg_local_vars_cb cb,
1927 iterate_over_block_locals (block, cb, cb_data);
1928 /* After handling the function's top-level block, stop. Don't
1929 continue to its superblock, the block of per-file
1931 if (BLOCK_FUNCTION (block))
1933 block = BLOCK_SUPERBLOCK (block);
1937 /* Data to be passed around in the calls to the locals and args
1940 struct print_variable_and_value_data
1942 struct frame_id frame_id;
1944 struct ui_file *stream;
1948 /* The callback for the locals and args iterators. */
1951 do_print_variable_and_value (const char *print_name,
1955 struct print_variable_and_value_data *p = cb_data;
1956 struct frame_info *frame;
1958 frame = frame_find_by_id (p->frame_id);
1961 warning (_("Unable to restore previously selected frame."));
1965 print_variable_and_value (print_name, sym, frame, p->stream, p->num_tabs);
1967 /* print_variable_and_value invalidates FRAME. */
1970 p->values_printed = 1;
1973 /* Print all variables from the innermost up to the function block of FRAME.
1974 Print them with values to STREAM indented by NUM_TABS.
1976 This function will invalidate FRAME. */
1979 print_frame_local_vars (struct frame_info *frame, int num_tabs,
1980 struct ui_file *stream)
1982 struct print_variable_and_value_data cb_data;
1983 struct block *block;
1986 if (!get_frame_pc_if_available (frame, &pc))
1988 fprintf_filtered (stream,
1989 _("PC unavailable, cannot determine locals.\n"));
1993 block = get_frame_block (frame, 0);
1996 fprintf_filtered (stream, "No symbol table info available.\n");
2000 cb_data.frame_id = get_frame_id (frame);
2001 cb_data.num_tabs = 4 * num_tabs;
2002 cb_data.stream = stream;
2003 cb_data.values_printed = 0;
2005 iterate_over_block_local_vars (block,
2006 do_print_variable_and_value,
2009 /* do_print_variable_and_value invalidates FRAME. */
2012 if (!cb_data.values_printed)
2013 fprintf_filtered (stream, _("No locals.\n"));
2017 locals_info (char *args, int from_tty)
2019 print_frame_local_vars (get_selected_frame (_("No frame selected.")),
2023 /* Iterate over all the argument variables in block B.
2025 Returns 1 if any argument was walked; 0 otherwise. */
2028 iterate_over_block_arg_vars (struct block *b,
2029 iterate_over_block_arg_local_vars_cb cb,
2032 struct block_iterator iter;
2033 struct symbol *sym, *sym2;
2035 ALL_BLOCK_SYMBOLS (b, iter, sym)
2037 /* Don't worry about things which aren't arguments. */
2038 if (SYMBOL_IS_ARGUMENT (sym))
2040 /* We have to look up the symbol because arguments can have
2041 two entries (one a parameter, one a local) and the one we
2042 want is the local, which lookup_symbol will find for us.
2043 This includes gcc1 (not gcc2) on the sparc when passing a
2044 small structure and gcc2 when the argument type is float
2045 and it is passed as a double and converted to float by
2046 the prologue (in the latter case the type of the LOC_ARG
2047 symbol is double and the type of the LOC_LOCAL symbol is
2048 float). There are also LOC_ARG/LOC_REGISTER pairs which
2049 are not combined in symbol-reading. */
2051 sym2 = lookup_symbol (SYMBOL_LINKAGE_NAME (sym),
2052 b, VAR_DOMAIN, NULL);
2053 (*cb) (SYMBOL_PRINT_NAME (sym), sym2, cb_data);
2058 /* Print all argument variables of the function of FRAME.
2059 Print them with values to STREAM.
2061 This function will invalidate FRAME. */
2064 print_frame_arg_vars (struct frame_info *frame, struct ui_file *stream)
2066 struct print_variable_and_value_data cb_data;
2067 struct symbol *func;
2070 if (!get_frame_pc_if_available (frame, &pc))
2072 fprintf_filtered (stream, _("PC unavailable, cannot determine args.\n"));
2076 func = get_frame_function (frame);
2079 fprintf_filtered (stream, _("No symbol table info available.\n"));
2083 cb_data.frame_id = get_frame_id (frame);
2084 cb_data.num_tabs = 0;
2085 cb_data.stream = gdb_stdout;
2086 cb_data.values_printed = 0;
2088 iterate_over_block_arg_vars (SYMBOL_BLOCK_VALUE (func),
2089 do_print_variable_and_value, &cb_data);
2091 /* do_print_variable_and_value invalidates FRAME. */
2094 if (!cb_data.values_printed)
2095 fprintf_filtered (stream, _("No arguments.\n"));
2099 args_info (char *ignore, int from_tty)
2101 print_frame_arg_vars (get_selected_frame (_("No frame selected.")),
2107 args_plus_locals_info (char *ignore, int from_tty)
2109 args_info (ignore, from_tty);
2110 locals_info (ignore, from_tty);
2114 /* Select frame FRAME. Also print the stack frame and show the source
2115 if this is the tui version. */
2117 select_and_print_frame (struct frame_info *frame)
2119 select_frame (frame);
2121 print_stack_frame (frame, 1, SRC_AND_LOC);
2124 /* Return the symbol-block in which the selected frame is executing.
2125 Can return zero under various legitimate circumstances.
2127 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
2128 code address within the block returned. We use this to decide
2129 which macros are in scope. */
2132 get_selected_block (CORE_ADDR *addr_in_block)
2134 if (!has_stack_frames ())
2137 return get_frame_block (get_selected_frame (NULL), addr_in_block);
2140 /* Find a frame a certain number of levels away from FRAME.
2141 LEVEL_OFFSET_PTR points to an int containing the number of levels.
2142 Positive means go to earlier frames (up); negative, the reverse.
2143 The int that contains the number of levels is counted toward
2144 zero as the frames for those levels are found.
2145 If the top or bottom frame is reached, that frame is returned,
2146 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
2147 how much farther the original request asked to go. */
2150 find_relative_frame (struct frame_info *frame, int *level_offset_ptr)
2152 /* Going up is simple: just call get_prev_frame enough times or
2153 until the initial frame is reached. */
2154 while (*level_offset_ptr > 0)
2156 struct frame_info *prev = get_prev_frame (frame);
2160 (*level_offset_ptr)--;
2164 /* Going down is just as simple. */
2165 while (*level_offset_ptr < 0)
2167 struct frame_info *next = get_next_frame (frame);
2171 (*level_offset_ptr)++;
2178 /* The "select_frame" command. With no argument this is a NOP.
2179 Select the frame at level LEVEL_EXP if it is a valid level.
2180 Otherwise, treat LEVEL_EXP as an address expression and select it.
2182 See parse_frame_specification for more info on proper frame
2186 select_frame_command (char *level_exp, int from_tty)
2188 select_frame (parse_frame_specification_1 (level_exp, "No stack.", NULL));
2191 /* The "frame" command. With no argument, print the selected frame
2192 briefly. With an argument, behave like select_frame and then print
2193 the selected frame. */
2196 frame_command (char *level_exp, int from_tty)
2198 select_frame_command (level_exp, from_tty);
2199 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
2202 /* The XDB Compatibility command to print the current frame. */
2205 current_frame_command (char *level_exp, int from_tty)
2207 print_stack_frame (get_selected_frame (_("No stack.")), 1, SRC_AND_LOC);
2210 /* Select the frame up one or COUNT_EXP stack levels from the
2211 previously selected frame, and print it briefly. */
2214 up_silently_base (char *count_exp)
2216 struct frame_info *frame;
2220 count = parse_and_eval_long (count_exp);
2222 frame = find_relative_frame (get_selected_frame ("No stack."), &count);
2223 if (count != 0 && count_exp == NULL)
2224 error (_("Initial frame selected; you cannot go up."));
2225 select_frame (frame);
2229 up_silently_command (char *count_exp, int from_tty)
2231 up_silently_base (count_exp);
2235 up_command (char *count_exp, int from_tty)
2237 up_silently_base (count_exp);
2238 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
2241 /* Select the frame down one or COUNT_EXP stack levels from the previously
2242 selected frame, and print it briefly. */
2245 down_silently_base (char *count_exp)
2247 struct frame_info *frame;
2251 count = -parse_and_eval_long (count_exp);
2253 frame = find_relative_frame (get_selected_frame ("No stack."), &count);
2254 if (count != 0 && count_exp == NULL)
2256 /* We only do this if COUNT_EXP is not specified. That way
2257 "down" means to really go down (and let me know if that is
2258 impossible), but "down 9999" can be used to mean go all the
2259 way down without getting an error. */
2261 error (_("Bottom (innermost) frame selected; you cannot go down."));
2264 select_frame (frame);
2268 down_silently_command (char *count_exp, int from_tty)
2270 down_silently_base (count_exp);
2274 down_command (char *count_exp, int from_tty)
2276 down_silently_base (count_exp);
2277 print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
2282 return_command (char *retval_exp, int from_tty)
2284 /* Initialize it just to avoid a GCC false warning. */
2285 enum return_value_convention rv_conv = RETURN_VALUE_STRUCT_CONVENTION;
2286 struct frame_info *thisframe;
2287 struct gdbarch *gdbarch;
2288 struct symbol *thisfun;
2289 struct value *return_value = NULL;
2290 struct value *function = NULL;
2291 const char *query_prefix = "";
2293 thisframe = get_selected_frame ("No selected frame.");
2294 thisfun = get_frame_function (thisframe);
2295 gdbarch = get_frame_arch (thisframe);
2297 if (get_frame_type (get_current_frame ()) == INLINE_FRAME)
2298 error (_("Can not force return from an inlined function."));
2300 /* Compute the return value. If the computation triggers an error,
2301 let it bail. If the return type can't be handled, set
2302 RETURN_VALUE to NULL, and QUERY_PREFIX to an informational
2306 struct expression *retval_expr = parse_expression (retval_exp);
2307 struct cleanup *old_chain = make_cleanup (xfree, retval_expr);
2308 struct type *return_type = NULL;
2310 /* Compute the return value. Should the computation fail, this
2311 call throws an error. */
2312 return_value = evaluate_expression (retval_expr);
2314 /* Cast return value to the return type of the function. Should
2315 the cast fail, this call throws an error. */
2316 if (thisfun != NULL)
2317 return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun));
2318 if (return_type == NULL)
2320 if (retval_expr->elts[0].opcode != UNOP_CAST
2321 && retval_expr->elts[0].opcode != UNOP_CAST_TYPE)
2322 error (_("Return value type not available for selected "
2324 "Please use an explicit cast of the value to return."));
2325 return_type = value_type (return_value);
2327 do_cleanups (old_chain);
2328 CHECK_TYPEDEF (return_type);
2329 return_value = value_cast (return_type, return_value);
2331 /* Make sure the value is fully evaluated. It may live in the
2332 stack frame we're about to pop. */
2333 if (value_lazy (return_value))
2334 value_fetch_lazy (return_value);
2336 if (thisfun != NULL)
2337 function = read_var_value (thisfun, thisframe);
2339 rv_conv = RETURN_VALUE_REGISTER_CONVENTION;
2340 if (TYPE_CODE (return_type) == TYPE_CODE_VOID)
2341 /* If the return-type is "void", don't try to find the
2342 return-value's location. However, do still evaluate the
2343 return expression so that, even when the expression result
2344 is discarded, side effects such as "return i++" still
2346 return_value = NULL;
2347 else if (thisfun != NULL)
2349 rv_conv = struct_return_convention (gdbarch, function, return_type);
2350 if (rv_conv == RETURN_VALUE_STRUCT_CONVENTION
2351 || rv_conv == RETURN_VALUE_ABI_RETURNS_ADDRESS)
2353 query_prefix = "The location at which to store the "
2354 "function's return value is unknown.\n"
2355 "If you continue, the return value "
2356 "that you specified will be ignored.\n";
2357 return_value = NULL;
2362 /* Does an interactive user really want to do this? Include
2363 information, such as how well GDB can handle the return value, in
2364 the query message. */
2369 if (thisfun == NULL)
2370 confirmed = query (_("%sMake selected stack frame return now? "),
2373 confirmed = query (_("%sMake %s return now? "), query_prefix,
2374 SYMBOL_PRINT_NAME (thisfun));
2376 error (_("Not confirmed"));
2379 /* Discard the selected frame and all frames inner-to it. */
2380 frame_pop (get_selected_frame (NULL));
2382 /* Store RETURN_VALUE in the just-returned register set. */
2383 if (return_value != NULL)
2385 struct type *return_type = value_type (return_value);
2386 struct gdbarch *gdbarch = get_regcache_arch (get_current_regcache ());
2388 gdb_assert (rv_conv != RETURN_VALUE_STRUCT_CONVENTION
2389 && rv_conv != RETURN_VALUE_ABI_RETURNS_ADDRESS);
2390 gdbarch_return_value (gdbarch, function, return_type,
2391 get_current_regcache (), NULL /*read*/,
2392 value_contents (return_value) /*write*/);
2395 /* If we are at the end of a call dummy now, pop the dummy frame
2397 if (get_frame_type (get_current_frame ()) == DUMMY_FRAME)
2398 frame_pop (get_current_frame ());
2400 /* If interactive, print the frame that is now current. */
2402 frame_command ("0", 1);
2404 select_frame_command ("0", 0);
2407 /* Sets the scope to input function name, provided that the function
2408 is within the current stack frame. */
2410 struct function_bounds
2412 CORE_ADDR low, high;
2416 func_command (char *arg, int from_tty)
2418 struct frame_info *frame;
2420 struct symtabs_and_lines sals;
2423 struct function_bounds *func_bounds = NULL;
2424 struct cleanup *cleanups;
2429 frame = parse_frame_specification ("0");
2430 sals = decode_line_with_current_source (arg, DECODE_LINE_FUNFIRSTLINE);
2431 cleanups = make_cleanup (xfree, sals.sals);
2432 func_bounds = (struct function_bounds *) xmalloc (
2433 sizeof (struct function_bounds) * sals.nelts);
2434 make_cleanup (xfree, func_bounds);
2435 for (i = 0; (i < sals.nelts && !found); i++)
2437 if (sals.sals[i].pspace != current_program_space)
2438 func_bounds[i].low = func_bounds[i].high = 0;
2439 else if (sals.sals[i].pc == 0
2440 || find_pc_partial_function (sals.sals[i].pc, NULL,
2441 &func_bounds[i].low,
2442 &func_bounds[i].high) == 0)
2444 func_bounds[i].low = func_bounds[i].high = 0;
2450 for (i = 0; (i < sals.nelts && !found); i++)
2451 found = (get_frame_pc (frame) >= func_bounds[i].low
2452 && get_frame_pc (frame) < func_bounds[i].high);
2456 frame = find_relative_frame (frame, &level);
2459 while (!found && level == 0);
2461 do_cleanups (cleanups);
2464 printf_filtered (_("'%s' not within current stack frame.\n"), arg);
2465 else if (frame != get_selected_frame (NULL))
2466 select_and_print_frame (frame);
2469 /* Gets the language of the current frame. */
2472 get_frame_language (void)
2474 struct frame_info *frame = deprecated_safe_get_selected_frame ();
2478 volatile struct gdb_exception ex;
2482 /* We determine the current frame language by looking up its
2483 associated symtab. To retrieve this symtab, we use the frame
2484 PC. However we cannot use the frame PC as is, because it
2485 usually points to the instruction following the "call", which
2486 is sometimes the first instruction of another function. So
2487 we rely on get_frame_address_in_block(), it provides us with
2488 a PC that is guaranteed to be inside the frame's code
2491 TRY_CATCH (ex, RETURN_MASK_ERROR)
2493 pc = get_frame_address_in_block (frame);
2497 if (ex.error != NOT_AVAILABLE_ERROR)
2498 throw_exception (ex);
2502 s = find_pc_symtab (pc);
2508 return language_unknown;
2512 /* Provide a prototype to silence -Wmissing-prototypes. */
2513 void _initialize_stack (void);
2516 _initialize_stack (void)
2518 add_com ("return", class_stack, return_command, _("\
2519 Make selected stack frame return to its caller.\n\
2520 Control remains in the debugger, but when you continue\n\
2521 execution will resume in the frame above the one now selected.\n\
2522 If an argument is given, it is an expression for the value to return."));
2524 add_com ("up", class_stack, up_command, _("\
2525 Select and print stack frame that called this one.\n\
2526 An argument says how many frames up to go."));
2527 add_com ("up-silently", class_support, up_silently_command, _("\
2528 Same as the `up' command, but does not print anything.\n\
2529 This is useful in command scripts."));
2531 add_com ("down", class_stack, down_command, _("\
2532 Select and print stack frame called by this one.\n\
2533 An argument says how many frames down to go."));
2534 add_com_alias ("do", "down", class_stack, 1);
2535 add_com_alias ("dow", "down", class_stack, 1);
2536 add_com ("down-silently", class_support, down_silently_command, _("\
2537 Same as the `down' command, but does not print anything.\n\
2538 This is useful in command scripts."));
2540 add_com ("frame", class_stack, frame_command, _("\
2541 Select and print a stack frame.\nWith no argument, \
2542 print the selected stack frame. (See also \"info frame\").\n\
2543 An argument specifies the frame to select.\n\
2544 It can be a stack frame number or the address of the frame.\n\
2545 With argument, nothing is printed if input is coming from\n\
2546 a command file or a user-defined command."));
2548 add_com_alias ("f", "frame", class_stack, 1);
2552 add_com ("L", class_stack, current_frame_command,
2553 _("Print the current stack frame.\n"));
2554 add_com_alias ("V", "frame", class_stack, 1);
2556 add_com ("select-frame", class_stack, select_frame_command, _("\
2557 Select a stack frame without printing anything.\n\
2558 An argument specifies the frame to select.\n\
2559 It can be a stack frame number or the address of the frame.\n"));
2561 add_com ("backtrace", class_stack, backtrace_command, _("\
2562 Print backtrace of all stack frames, or innermost COUNT frames.\n\
2563 With a negative argument, print outermost -COUNT frames.\nUse of the \
2564 'full' qualifier also prints the values of the local variables.\n"));
2565 add_com_alias ("bt", "backtrace", class_stack, 0);
2568 add_com_alias ("t", "backtrace", class_stack, 0);
2569 add_com ("T", class_stack, backtrace_full_command, _("\
2570 Print backtrace of all stack frames, or innermost COUNT frames\n\
2571 and the values of the local variables.\n\
2572 With a negative argument, print outermost -COUNT frames.\n\
2573 Usage: T <count>\n"));
2576 add_com_alias ("where", "backtrace", class_alias, 0);
2577 add_info ("stack", backtrace_command,
2578 _("Backtrace of the stack, or innermost COUNT frames."));
2579 add_info_alias ("s", "stack", 1);
2580 add_info ("frame", frame_info,
2581 _("All about selected stack frame, or frame at ADDR."));
2582 add_info_alias ("f", "frame", 1);
2583 add_info ("locals", locals_info,
2584 _("Local variables of current stack frame."));
2585 add_info ("args", args_info,
2586 _("Argument variables of current stack frame."));
2588 add_com ("l", class_info, args_plus_locals_info,
2589 _("Argument and local variables of current stack frame."));
2592 add_com ("func", class_stack, func_command, _("\
2593 Select the stack frame that contains <func>.\n\
2594 Usage: func <name>\n"));
2596 add_setshow_enum_cmd ("frame-arguments", class_stack,
2597 print_frame_arguments_choices, &print_frame_arguments,
2598 _("Set printing of non-scalar frame arguments"),
2599 _("Show printing of non-scalar frame arguments"),
2600 NULL, NULL, NULL, &setprintlist, &showprintlist);
2602 add_setshow_auto_boolean_cmd ("disassemble-next-line", class_stack,
2603 &disassemble_next_line, _("\
2604 Set whether to disassemble next source line or insn when execution stops."),
2606 Show whether to disassemble next source line or insn when execution stops."),
2608 If ON, GDB will display disassembly of the next source line, in addition\n\
2609 to displaying the source line itself. If the next source line cannot\n\
2610 be displayed (e.g., source is unavailable or there's no line info), GDB\n\
2611 will display disassembly of next instruction instead of showing the\n\
2613 If AUTO, display disassembly of next instruction only if the source line\n\
2614 cannot be displayed.\n\
2615 If OFF (which is the default), never display the disassembly of the next\n\
2618 show_disassemble_next_line,
2619 &setlist, &showlist);
2620 disassemble_next_line = AUTO_BOOLEAN_FALSE;
2622 add_setshow_enum_cmd ("entry-values", class_stack,
2623 print_entry_values_choices, &print_entry_values,
2624 _("Set printing of function arguments at function "
2626 _("Show printing of function arguments at function "
2629 GDB can sometimes determine the values of function arguments at entry,\n\
2630 in addition to their current values. This option tells GDB whether\n\
2631 to print the current value, the value at entry (marked as val@entry),\n\
2632 or both. Note that one or both of these values may be <optimized out>."),
2633 NULL, NULL, &setprintlist, &showprintlist);