1 /* Print and select stack frames for GDB, the GNU debugger.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
26 #include "gdb_string.h"
30 #include "expression.h"
37 #include "breakpoint.h"
43 /* Prototypes for exported functions. */
45 void args_info (char *, int);
47 void locals_info (char *, int);
49 void (*selected_frame_level_changed_hook) (int);
51 void _initialize_stack (void);
53 void return_command (char *, int);
55 /* Prototypes for local functions. */
57 static void down_command (char *, int);
59 static void down_silently_base (char *);
61 static void down_silently_command (char *, int);
63 static void up_command (char *, int);
65 static void up_silently_base (char *);
67 static void up_silently_command (char *, int);
69 void frame_command (char *, int);
71 static void current_frame_command (char *, int);
73 static void select_frame_command (char *, int);
75 static void print_frame_arg_vars (struct frame_info *, struct ui_file *);
77 static void catch_info (char *, int);
79 static void args_plus_locals_info (char *, int);
81 static void print_frame_label_vars (struct frame_info *, int,
84 static void print_frame_local_vars (struct frame_info *, int,
87 static int print_block_frame_labels (struct block *, int *,
90 static int print_block_frame_locals (struct block *,
95 static void print_frame (struct frame_info *fi,
99 struct symtab_and_line sal);
101 static void print_frame_info_base (struct frame_info *, int, int, int);
103 static void print_stack_frame_base (struct frame_info *, int, int);
105 static void backtrace_command (char *, int);
107 struct frame_info *parse_frame_specification (char *);
109 static void frame_info (char *, int);
111 extern int addressprint; /* Print addresses, or stay symbolic only? */
113 /* Zero means do things normally; we are interacting directly with the
114 user. One means print the full filename and linenumber when a
115 frame is printed, and do so in a format emacs18/emacs19.22 can
116 parse. Two means print similar annotations, but in many more
117 cases and in a slightly different syntax. */
119 int annotation_level = 0;
122 struct print_stack_frame_args
124 struct frame_info *fi;
130 static int print_stack_frame_base_stub (char *);
132 /* Show and print the frame arguments.
133 Pass the args the way catch_errors wants them. */
134 static int show_and_print_stack_frame_stub (void *args);
136 show_and_print_stack_frame_stub (void *args)
138 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
140 print_frame_info (p->fi, p->level, p->source, p->args);
145 /* Show or print the frame arguments.
146 Pass the args the way catch_errors wants them. */
147 static int print_stack_frame_stub (void *args);
149 print_stack_frame_stub (void *args)
151 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
153 print_frame_info_base (p->fi, p->level, p->source, p->args);
157 /* Print a stack frame briefly. FRAME_INFI should be the frame info
158 and LEVEL should be its level in the stack (or -1 for level not
161 /* Pass the args the way catch_errors wants them. */
163 print_stack_frame_base_stub (char *args)
165 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
167 print_frame_info_base (p->fi, p->level, p->source, p->args);
171 /* print the frame arguments to the terminal.
172 Pass the args the way catch_errors wants them. */
173 static int print_only_stack_frame_stub (void *);
175 print_only_stack_frame_stub (void *args)
177 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
179 print_frame_info_base (p->fi, p->level, p->source, p->args);
183 /* Print a stack frame briefly. FRAME_INFI should be the frame info
184 and LEVEL should be its level in the stack (or -1 for level not defined).
185 This prints the level, the function executing, the arguments,
186 and the file name and line number.
187 If the pc is not at the beginning of the source line,
188 the actual pc is printed at the beginning.
190 If SOURCE is 1, print the source line as well.
191 If SOURCE is -1, print ONLY the source line. */
194 print_stack_frame_base (struct frame_info *fi, int level, int source)
196 struct print_stack_frame_args args;
200 args.source = source;
203 catch_errors (print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
206 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
207 and LEVEL should be its level in the stack (or -1 for level not defined).
208 This prints the level, the function executing, the arguments,
209 and the file name and line number.
210 If the pc is not at the beginning of the source line,
211 the actual pc is printed at the beginning.
213 If SOURCE is 1, print the source line as well.
214 If SOURCE is -1, print ONLY the source line. */
217 show_and_print_stack_frame (struct frame_info *fi, int level, int source)
219 struct print_stack_frame_args args;
223 args.source = source;
226 catch_errors (show_and_print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
230 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
231 and LEVEL should be its level in the stack (or -1 for level not defined).
232 This prints the level, the function executing, the arguments,
233 and the file name and line number.
234 If the pc is not at the beginning of the source line,
235 the actual pc is printed at the beginning.
237 If SOURCE is 1, print the source line as well.
238 If SOURCE is -1, print ONLY the source line. */
241 print_stack_frame (struct frame_info *fi, int level, int source)
243 struct print_stack_frame_args args;
247 args.source = source;
250 catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL);
253 /* Print a stack frame briefly. FRAME_INFI should be the frame info
254 and LEVEL should be its level in the stack (or -1 for level not defined).
255 This prints the level, the function executing, the arguments,
256 and the file name and line number.
257 If the pc is not at the beginning of the source line,
258 the actual pc is printed at the beginning.
260 If SOURCE is 1, print the source line as well.
261 If SOURCE is -1, print ONLY the source line. */
264 print_only_stack_frame (struct frame_info *fi, int level, int source)
266 struct print_stack_frame_args args;
270 args.source = source;
273 catch_errors (print_only_stack_frame_stub, &args, "", RETURN_MASK_ALL);
276 struct print_args_args
279 struct frame_info *fi;
280 struct ui_file *stream;
283 static int print_args_stub (PTR);
285 /* Pass the args the way catch_errors wants them. */
288 print_args_stub (PTR args)
291 struct print_args_args *p = (struct print_args_args *) args;
293 numargs = FRAME_NUM_ARGS (p->fi);
294 print_frame_args (p->func, p->fi, numargs, p->stream);
298 /* Print information about a frame for frame "fi" at level "level".
299 Used in "where" output, also used to emit breakpoint or step
301 LEVEL is the level of the frame, or -1 if it is the
302 innermost frame but we don't want to print the level.
303 The meaning of the SOURCE argument is:
304 SRC_LINE: Print only source line
305 LOCATION: Print only location
306 LOC_AND_SRC: Print location and source line. */
309 print_frame_info_base (struct frame_info *fi, int level, int source, int args)
311 struct symtab_and_line sal;
315 if (get_frame_type (fi) == DUMMY_FRAME)
317 annotate_frame_begin (level == -1 ? 0 : level, get_frame_pc (fi));
319 /* Do this regardless of SOURCE because we don't have any source
320 to list for this frame. */
323 ui_out_text (uiout, "#");
324 ui_out_field_fmt_int (uiout, 2, ui_left, "level", level);
326 annotate_function_call ();
327 printf_filtered ("<function called from gdb>\n");
328 annotate_frame_end ();
331 if ((get_frame_type (fi) == SIGTRAMP_FRAME))
333 annotate_frame_begin (level == -1 ? 0 : level, get_frame_pc (fi));
335 /* Do this regardless of SOURCE because we don't have any source
336 to list for this frame. */
339 ui_out_text (uiout, "#");
340 ui_out_field_fmt_int (uiout, 2, ui_left, "level", level);
342 annotate_signal_handler_caller ();
343 printf_filtered ("<signal handler called>\n");
344 annotate_frame_end ();
348 /* If fi is not the innermost frame, that normally means that fi->pc
349 points to *after* the call instruction, and we want to get the
350 line containing the call, never the next line. But if the next
351 frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame
352 was not entered as the result of a call, and we want to get the
353 line containing fi->pc. */
354 find_frame_sal (fi, &sal);
356 location_print = (source == LOCATION
357 || source == LOC_AND_ADDRESS
358 || source == SRC_AND_LOC);
360 if (location_print || !sal.symtab)
361 print_frame (fi, level, source, args, sal);
363 source_print = (source == SRC_LINE || source == SRC_AND_LOC);
366 set_current_source_symtab_and_line (&sal);
368 if (source_print && sal.symtab)
370 struct symtab_and_line cursal;
372 int mid_statement = (source == SRC_LINE) && (get_frame_pc (fi) != sal.pc);
374 if (annotation_level)
375 done = identify_source_line (sal.symtab, sal.line, mid_statement,
379 if (print_frame_info_listing_hook)
380 print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0);
383 /* We used to do this earlier, but that is clearly
384 wrong. This function is used by many different
385 parts of gdb, including normal_stop in infrun.c,
386 which uses this to print out the current PC
387 when we stepi/nexti into the middle of a source
388 line. Only the command line really wants this
389 behavior. Other UIs probably would like the
390 ability to decide for themselves if it is desired. */
391 if (addressprint && mid_statement)
393 ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi));
394 ui_out_text (uiout, "\t");
397 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
400 /* Make sure we have at least a default source file */
401 set_default_source_symtab_and_line ();
402 cursal = get_current_source_symtab_and_line ();
403 cursal.line = max (sal.line - get_lines_to_list () / 2, 1);
404 set_current_source_symtab_and_line (&cursal);
408 set_default_breakpoint (1, get_frame_pc (fi), sal.symtab, sal.line);
410 annotate_frame_end ();
412 gdb_flush (gdb_stdout);
416 print_frame (struct frame_info *fi,
420 struct symtab_and_line sal)
423 register char *funname = 0;
424 enum language funlang = language_unknown;
425 struct ui_stream *stb;
426 struct cleanup *old_chain;
427 struct cleanup *list_chain;
429 stb = ui_out_stream_new (uiout);
430 old_chain = make_cleanup_ui_out_stream_delete (stb);
432 func = find_pc_function (frame_address_in_block (fi));
435 /* In certain pathological cases, the symtabs give the wrong
436 function (when we are in the first function in a file which
437 is compiled without debugging symbols, the previous function
438 is compiled with debugging symbols, and the "foo.o" symbol
439 that is supposed to tell us where the file with debugging symbols
440 ends has been truncated by ar because it is longer than 15
441 characters). This also occurs if the user uses asm() to create
442 a function but not stabs for it (in a file compiled -g).
444 So look in the minimal symbol tables as well, and if it comes
445 up with a larger address for the function use that instead.
446 I don't think this can ever cause any problems; there shouldn't
447 be any minimal symbols in the middle of a function; if this is
448 ever changed many parts of GDB will need to be changed (and we'll
449 create a find_pc_minimal_function or some such). */
451 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (frame_address_in_block (fi));
453 && (SYMBOL_VALUE_ADDRESS (msymbol)
454 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
457 /* There is no particular reason to think the line number
458 information is wrong. Someone might have just put in
459 a label with asm() but left the line numbers alone. */
460 /* In this case we have no way of knowing the source file
461 and line number, so don't print them. */
464 /* We also don't know anything about the function besides
465 its address and name. */
467 funname = SYMBOL_NAME (msymbol);
468 funlang = SYMBOL_LANGUAGE (msymbol);
472 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
473 demangled name that we already have stored in the symbol
474 table, but we stored a version with DMGL_PARAMS turned
475 on, and here we don't want to display parameters. So call
476 the demangler again, with DMGL_ANSI only. (Yes, I know
477 that printf_symbol_filtered() will again try to demangle
478 the name on the fly, but the issue is that if
479 cplus_demangle() fails here, it'll fail there too. So we
480 want to catch the failure ("demangled==NULL" case below)
481 here, while we still have our hands on the function
484 funname = SYMBOL_NAME (func);
485 funlang = SYMBOL_LANGUAGE (func);
486 if (funlang == language_cplus)
488 demangled = cplus_demangle (funname, DMGL_ANSI);
489 if (demangled == NULL)
490 /* If the demangler fails, try the demangled name from
491 the symbol table. This'll have parameters, but
492 that's preferable to diplaying a mangled name. */
493 funname = SYMBOL_SOURCE_NAME (func);
499 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (frame_address_in_block (fi));
502 funname = SYMBOL_NAME (msymbol);
503 funlang = SYMBOL_LANGUAGE (msymbol);
507 annotate_frame_begin (level == -1 ? 0 : level, get_frame_pc (fi));
509 list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
513 ui_out_text (uiout, "#");
514 ui_out_field_fmt_int (uiout, 2, ui_left, "level", level);
517 if (get_frame_pc (fi) != sal.pc
519 || source == LOC_AND_ADDRESS)
521 annotate_frame_address ();
522 ui_out_field_core_addr (uiout, "addr", get_frame_pc (fi));
523 annotate_frame_address_end ();
524 ui_out_text (uiout, " in ");
526 annotate_frame_function_name ();
527 fprintf_symbol_filtered (stb->stream, funname ? funname : "??", funlang,
529 ui_out_field_stream (uiout, "func", stb);
530 ui_out_wrap_hint (uiout, " ");
531 annotate_frame_args ();
533 ui_out_text (uiout, " (");
536 struct print_args_args args;
537 struct cleanup *args_list_chain;
540 args.stream = gdb_stdout;
541 args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args");
542 catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL);
543 /* FIXME: args must be a list. If one argument is a string it will
544 have " that will not be properly escaped. */
545 /* Invoke ui_out_tuple_end. */
546 do_cleanups (args_list_chain);
549 ui_out_text (uiout, ")");
550 if (sal.symtab && sal.symtab->filename)
552 annotate_frame_source_begin ();
553 ui_out_wrap_hint (uiout, " ");
554 ui_out_text (uiout, " at ");
555 annotate_frame_source_file ();
556 ui_out_field_string (uiout, "file", sal.symtab->filename);
557 annotate_frame_source_file_end ();
558 ui_out_text (uiout, ":");
559 annotate_frame_source_line ();
560 ui_out_field_int (uiout, "line", sal.line);
561 annotate_frame_source_end ();
565 if (!funname || (!sal.symtab || !sal.symtab->filename))
567 char *lib = PC_SOLIB (get_frame_pc (fi));
570 annotate_frame_where ();
571 ui_out_wrap_hint (uiout, " ");
572 ui_out_text (uiout, " from ");
573 ui_out_field_string (uiout, "from", lib);
576 #endif /* PC_SOLIB */
578 /* do_cleanups will call ui_out_tuple_end() for us. */
579 do_cleanups (list_chain);
580 ui_out_text (uiout, "\n");
581 do_cleanups (old_chain);
585 /* Show or print the frame info. If this is the tui, it will be shown in
586 the source display */
588 print_frame_info (struct frame_info *fi, register int level, int source,
591 print_frame_info_base (fi, level, source, args);
594 /* Show the frame info. If this is the tui, it will be shown in
595 the source display otherwise, nothing is done */
597 show_stack_frame (struct frame_info *fi)
602 /* Read a frame specification in whatever the appropriate format is.
603 Call error() if the specification is in any way invalid (i.e.
604 this function never returns NULL). */
607 parse_frame_specification (char *frame_exp)
611 CORE_ADDR args[MAXARGS];
616 char *addr_string, *p;
617 struct cleanup *tmp_cleanup;
619 while (*frame_exp == ' ')
624 if (numargs > MAXARGS)
625 error ("Too many args in frame specification");
626 /* Parse an argument. */
627 for (p = frame_exp; *p && *p != ' '; p++)
629 addr_string = savestring (frame_exp, p - frame_exp);
634 tmp_cleanup = make_cleanup (xfree, addr_string);
636 /* NOTE: we call parse_and_eval and then both
637 value_as_long and value_as_address rather than calling
638 parse_and_eval_long and parse_and_eval_address because
639 of the issue of potential side effects from evaluating
641 vp = parse_and_eval (addr_string);
643 level = value_as_long (vp);
645 args[numargs++] = value_as_address (vp);
646 do_cleanups (tmp_cleanup);
649 /* Skip spaces, move to possible next arg. */
659 if (deprecated_selected_frame == NULL)
660 error ("No selected frame.");
661 return deprecated_selected_frame;
665 struct frame_info *fid =
666 find_relative_frame (get_current_frame (), &level);
667 struct frame_info *tfid;
670 /* find_relative_frame was successful */
673 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
674 take at least 2 addresses. It is important to detect this case
675 here so that "frame 100" does not give a confusing error message
676 like "frame specification requires two addresses". This of course
677 does not solve the "frame 100" problem for machines on which
678 a frame specification can be made with one address. To solve
679 that, we need a new syntax for a specifying a frame by address.
680 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
681 two args, etc.), but people might think that is too much typing,
682 so I guess *0x23,0x45 would be a possible alternative (commas
683 really should be used instead of spaces to delimit; using spaces
684 normally works in an expression). */
685 #ifdef SETUP_ARBITRARY_FRAME
686 error ("No frame %s", paddr_d (args[0]));
689 /* If (s)he specifies the frame with an address, he deserves what
690 (s)he gets. Still, give the highest one that matches. */
692 for (fid = get_current_frame ();
693 fid && get_frame_base (fid) != args[0];
694 fid = get_prev_frame (fid))
698 while ((tfid = get_prev_frame (fid)) &&
699 (get_frame_base (tfid) == args[0]))
702 /* We couldn't identify the frame as an existing frame, but
703 perhaps we can create one with a single argument. */
707 #ifdef SETUP_ARBITRARY_FRAME
708 return SETUP_ARBITRARY_FRAME (numargs, args);
710 /* Usual case. Do it here rather than have everyone supply
711 a SETUP_ARBITRARY_FRAME that does this. */
713 return create_new_frame (args[0], 0);
714 error ("Too many args in frame specification");
721 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
722 that if it is unsure about the answer, it returns 0
723 instead of guessing (this happens on the VAX and i960, for example).
725 On most machines, we never have to guess about the args address,
726 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
727 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
728 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
731 /* Print verbosely the selected frame or the frame at address ADDR.
732 This means absolutely all information in the frame is printed. */
735 frame_info (char *addr_exp, int from_tty)
737 struct frame_info *fi;
738 struct symtab_and_line sal;
741 struct frame_info *calling_frame_info;
742 int i, count, numregs;
744 enum language funlang = language_unknown;
746 if (!target_has_stack)
749 fi = parse_frame_specification (addr_exp);
751 error ("Invalid frame specified.");
753 find_frame_sal (fi, &sal);
754 func = get_frame_function (fi);
755 /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain
757 s = find_pc_symtab (get_frame_pc (fi));
760 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
761 * the demangled name that we already have stored in
762 * the symbol table, but we stored a version with
763 * DMGL_PARAMS turned on, and here we don't want
764 * to display parameters. So call the demangler again,
765 * with DMGL_ANSI only. RT
766 * (Yes, I know that printf_symbol_filtered() will
767 * again try to demangle the name on the fly, but
768 * the issue is that if cplus_demangle() fails here,
769 * it'll fail there too. So we want to catch the failure
770 * ("demangled==NULL" case below) here, while we still
771 * have our hands on the function symbol.)
774 funname = SYMBOL_NAME (func);
775 funlang = SYMBOL_LANGUAGE (func);
776 if (funlang == language_cplus)
778 demangled = cplus_demangle (funname, DMGL_ANSI);
779 /* If the demangler fails, try the demangled name
780 * from the symbol table. This'll have parameters,
781 * but that's preferable to diplaying a mangled name.
783 if (demangled == NULL)
784 funname = SYMBOL_SOURCE_NAME (func);
789 register struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (get_frame_pc (fi));
792 funname = SYMBOL_NAME (msymbol);
793 funlang = SYMBOL_LANGUAGE (msymbol);
796 calling_frame_info = get_prev_frame (fi);
798 if (!addr_exp && frame_relative_level (deprecated_selected_frame) >= 0)
800 printf_filtered ("Stack level %d, frame at ",
801 frame_relative_level (deprecated_selected_frame));
802 print_address_numeric (get_frame_base (fi), 1, gdb_stdout);
803 printf_filtered (":\n");
807 printf_filtered ("Stack frame at ");
808 print_address_numeric (get_frame_base (fi), 1, gdb_stdout);
809 printf_filtered (":\n");
811 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM));
812 print_address_numeric (get_frame_pc (fi), 1, gdb_stdout);
817 printf_filtered (" in ");
818 fprintf_symbol_filtered (gdb_stdout, funname, funlang,
819 DMGL_ANSI | DMGL_PARAMS);
823 printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line);
824 puts_filtered ("; ");
826 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM));
827 print_address_numeric (frame_pc_unwind (fi), 1, gdb_stdout);
828 printf_filtered ("\n");
832 frameless = FRAMELESS_FUNCTION_INVOCATION (fi);
834 printf_filtered (" (FRAMELESS),");
837 if (calling_frame_info)
839 printf_filtered (" called by frame at ");
840 print_address_numeric (get_frame_base (calling_frame_info),
843 if (get_next_frame (fi) && calling_frame_info)
846 if (get_next_frame (fi))
848 printf_filtered (" caller of frame at ");
849 print_address_numeric (get_frame_base (get_next_frame (fi)), 1,
852 if (get_next_frame (fi) || calling_frame_info)
853 puts_filtered ("\n");
855 printf_filtered (" source language %s.\n",
856 language_str (s->language));
858 #ifdef PRINT_EXTRA_FRAME_INFO
859 PRINT_EXTRA_FRAME_INFO (fi);
863 /* Address of the argument list for this frame, or 0. */
864 CORE_ADDR arg_list = FRAME_ARGS_ADDRESS_CORRECT (fi);
865 /* Number of args for this frame, or -1 if unknown. */
869 printf_filtered (" Arglist at unknown address.\n");
872 printf_filtered (" Arglist at ");
873 print_address_numeric (arg_list, 1, gdb_stdout);
874 printf_filtered (",");
876 numargs = FRAME_NUM_ARGS (fi);
878 puts_filtered (" args: ");
879 else if (numargs == 0)
880 puts_filtered (" no args.");
881 else if (numargs == 1)
882 puts_filtered (" 1 arg: ");
884 printf_filtered (" %d args: ", numargs);
885 print_frame_args (func, fi, numargs, gdb_stdout);
886 puts_filtered ("\n");
890 /* Address of the local variables for this frame, or 0. */
891 CORE_ADDR arg_list = FRAME_LOCALS_ADDRESS (fi);
894 printf_filtered (" Locals at unknown address,");
897 printf_filtered (" Locals at ");
898 print_address_numeric (arg_list, 1, gdb_stdout);
899 printf_filtered (",");
903 if (FRAME_INIT_SAVED_REGS_P ()
904 && get_frame_saved_regs (fi) == NULL)
905 FRAME_INIT_SAVED_REGS (fi);
906 /* Print as much information as possible on the location of all the
917 /* The sp is special; what's displayed isn't the save address, but
918 the value of the previous frame's sp. This is a legacy thing,
919 at one stage the frame cached the previous frame's SP instead
920 of its address, hence it was easiest to just display the cached
924 /* Find out the location of the saved stack pointer with out
925 actually evaluating it. */
926 frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr,
928 if (!optimized && lval == not_lval)
930 void *value = alloca (MAX_REGISTER_RAW_SIZE);
932 frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr,
934 sp = extract_address (value, REGISTER_RAW_SIZE (SP_REGNUM));
935 printf_filtered (" Previous frame's sp is ");
936 print_address_numeric (sp, 1, gdb_stdout);
937 printf_filtered ("\n");
940 else if (!optimized && lval == lval_memory)
942 printf_filtered (" Previous frame's sp at ");
943 print_address_numeric (addr, 1, gdb_stdout);
944 printf_filtered ("\n");
947 else if (!optimized && lval == lval_register)
949 printf_filtered (" Previous frame's sp in %s\n",
950 REGISTER_NAME (realnum));
953 /* else keep quiet. */
957 numregs = NUM_REGS + NUM_PSEUDO_REGS;
958 for (i = 0; i < numregs; i++)
961 /* Find out the location of the saved register without
962 fetching the corresponding value. */
963 frame_register_unwind (fi, i, &optimized, &lval, &addr, &realnum,
965 /* For moment, only display registers that were saved on the
967 if (!optimized && lval == lval_memory)
970 puts_filtered (" Saved registers:\n ");
974 printf_filtered (" %s at ", REGISTER_NAME (i));
975 print_address_numeric (addr, 1, gdb_stdout);
979 if (count || need_nl)
980 puts_filtered ("\n");
985 /* Set a limit on the number of frames printed by default in a
988 static int backtrace_limit;
991 set_backtrace_limit_command (char *count_exp, int from_tty)
993 int count = parse_and_eval_long (count_exp);
996 error ("Negative argument not meaningful as backtrace limit.");
998 backtrace_limit = count;
1002 backtrace_limit_info (char *arg, int from_tty)
1005 error ("\"Info backtrace-limit\" takes no arguments.");
1007 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit);
1011 /* Print briefly all stack frames or just the innermost COUNT frames. */
1013 static void backtrace_command_1 (char *count_exp, int show_locals,
1016 backtrace_command_1 (char *count_exp, int show_locals, int from_tty)
1018 struct frame_info *fi;
1021 register struct frame_info *trailing;
1022 register int trailing_level;
1024 if (!target_has_stack)
1025 error ("No stack.");
1027 /* The following code must do two things. First, it must
1028 set the variable TRAILING to the frame from which we should start
1029 printing. Second, it must set the variable count to the number
1030 of frames which we should print, or -1 if all of them. */
1031 trailing = get_current_frame ();
1033 /* The target can be in a state where there is no valid frames
1034 (e.g., just connected). */
1035 if (trailing == NULL)
1036 error ("No stack.");
1041 count = parse_and_eval_long (count_exp);
1044 struct frame_info *current;
1049 while (current && count--)
1052 current = get_prev_frame (current);
1055 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1056 will be COUNT below it. */
1060 trailing = get_prev_frame (trailing);
1061 current = get_prev_frame (current);
1073 struct partial_symtab *ps;
1075 /* Read in symbols for all of the frames. Need to do this in
1076 a separate pass so that "Reading in symbols for xxx" messages
1077 don't screw up the appearance of the backtrace. Also
1078 if people have strong opinions against reading symbols for
1079 backtrace this may have to be an option. */
1083 fi = get_prev_frame (fi))
1086 ps = find_pc_psymtab (frame_address_in_block (fi));
1088 PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */
1092 for (i = 0, fi = trailing;
1094 i++, fi = get_prev_frame (fi))
1098 /* Don't use print_stack_frame; if an error() occurs it probably
1099 means further attempts to backtrace would fail (on the other
1100 hand, perhaps the code does or could be fixed to make sure
1101 the frame->prev field gets set to NULL in that case). */
1102 print_frame_info_base (fi, trailing_level + i, 0, 1);
1104 print_frame_local_vars (fi, 1, gdb_stdout);
1107 /* If we've stopped before the end, mention that. */
1109 printf_filtered ("(More stack frames follow...)\n");
1113 backtrace_command (char *arg, int from_tty)
1115 struct cleanup *old_chain = (struct cleanup *) NULL;
1116 char **argv = (char **) NULL;
1117 int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0;
1120 if (arg != (char *) NULL)
1124 argv = buildargv (arg);
1125 old_chain = make_cleanup_freeargv (argv);
1127 for (i = 0; (argv[i] != (char *) NULL); i++)
1131 for (j = 0; (j < strlen (argv[i])); j++)
1132 argv[i][j] = tolower (argv[i][j]);
1134 if (argIndicatingFullTrace < 0 && subset_compare (argv[i], "full"))
1135 argIndicatingFullTrace = argc;
1139 totArgLen += strlen (argv[i]);
1143 if (argIndicatingFullTrace >= 0)
1147 argPtr = (char *) xmalloc (totArgLen + 1);
1152 memset (argPtr, 0, totArgLen + 1);
1153 for (i = 0; (i < (argc + 1)); i++)
1155 if (i != argIndicatingFullTrace)
1157 strcat (argPtr, argv[i]);
1158 strcat (argPtr, " ");
1164 argPtr = (char *) NULL;
1168 backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty);
1170 if (argIndicatingFullTrace >= 0 && totArgLen > 0)
1174 do_cleanups (old_chain);
1177 static void backtrace_full_command (char *arg, int from_tty);
1179 backtrace_full_command (char *arg, int from_tty)
1181 backtrace_command_1 (arg, 1, from_tty);
1185 /* Print the local variables of a block B active in FRAME.
1186 Return 1 if any variables were printed; 0 otherwise. */
1189 print_block_frame_locals (struct block *b, register struct frame_info *fi,
1190 int num_tabs, register struct ui_file *stream)
1193 register struct symbol *sym;
1194 register int values_printed = 0;
1196 ALL_BLOCK_SYMBOLS (b, i, sym)
1198 switch (SYMBOL_CLASS (sym))
1205 for (j = 0; j < num_tabs; j++)
1206 fputs_filtered ("\t", stream);
1207 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1208 fputs_filtered (" = ", stream);
1209 print_variable_value (sym, fi, stream);
1210 fprintf_filtered (stream, "\n");
1214 /* Ignore symbols which are not locals. */
1218 return values_printed;
1221 /* Same, but print labels. */
1224 print_block_frame_labels (struct block *b, int *have_default,
1225 register struct ui_file *stream)
1228 register struct symbol *sym;
1229 register int values_printed = 0;
1231 ALL_BLOCK_SYMBOLS (b, i, sym)
1233 if (STREQ (SYMBOL_NAME (sym), "default"))
1239 if (SYMBOL_CLASS (sym) == LOC_LABEL)
1241 struct symtab_and_line sal;
1242 sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
1244 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1247 fprintf_filtered (stream, " ");
1248 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, stream);
1250 fprintf_filtered (stream, " in file %s, line %d\n",
1251 sal.symtab->filename, sal.line);
1254 return values_printed;
1257 /* Print on STREAM all the local variables in frame FRAME,
1258 including all the blocks active in that frame
1261 Returns 1 if the job was done,
1262 or 0 if nothing was printed because we have no info
1263 on the function running in FRAME. */
1266 print_frame_local_vars (register struct frame_info *fi, register int num_tabs,
1267 register struct ui_file *stream)
1269 register struct block *block = get_frame_block (fi, 0);
1270 register int values_printed = 0;
1274 fprintf_filtered (stream, "No symbol table info available.\n");
1280 if (print_block_frame_locals (block, fi, num_tabs, stream))
1282 /* After handling the function's top-level block, stop.
1283 Don't continue to its superblock, the block of
1284 per-file symbols. */
1285 if (BLOCK_FUNCTION (block))
1287 block = BLOCK_SUPERBLOCK (block);
1290 if (!values_printed)
1292 fprintf_filtered (stream, "No locals.\n");
1296 /* Same, but print labels. */
1299 print_frame_label_vars (register struct frame_info *fi, int this_level_only,
1300 register struct ui_file *stream)
1302 register struct blockvector *bl;
1303 register struct block *block = get_frame_block (fi, 0);
1304 register int values_printed = 0;
1305 int index, have_default = 0;
1306 char *blocks_printed;
1307 CORE_ADDR pc = get_frame_pc (fi);
1311 fprintf_filtered (stream, "No symbol table info available.\n");
1315 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
1316 blocks_printed = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
1317 memset (blocks_printed, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
1321 CORE_ADDR end = BLOCK_END (block) - 4;
1324 if (bl != blockvector_for_pc (end, &index))
1325 error ("blockvector blotch");
1326 if (BLOCKVECTOR_BLOCK (bl, index) != block)
1327 error ("blockvector botch");
1328 last_index = BLOCKVECTOR_NBLOCKS (bl);
1331 /* Don't print out blocks that have gone by. */
1332 while (index < last_index
1333 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
1336 while (index < last_index
1337 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
1339 if (blocks_printed[index] == 0)
1341 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl, index), &have_default, stream))
1343 blocks_printed[index] = 1;
1349 if (values_printed && this_level_only)
1352 /* After handling the function's top-level block, stop.
1353 Don't continue to its superblock, the block of
1354 per-file symbols. */
1355 if (BLOCK_FUNCTION (block))
1357 block = BLOCK_SUPERBLOCK (block);
1360 if (!values_printed && !this_level_only)
1362 fprintf_filtered (stream, "No catches.\n");
1368 locals_info (char *args, int from_tty)
1370 if (!deprecated_selected_frame)
1371 error ("No frame selected.");
1372 print_frame_local_vars (deprecated_selected_frame, 0, gdb_stdout);
1376 catch_info (char *ignore, int from_tty)
1378 struct symtab_and_line *sal;
1380 /* Check for target support for exception handling */
1381 sal = target_enable_exception_callback (EX_EVENT_CATCH, 1);
1384 /* Currently not handling this */
1385 /* Ideally, here we should interact with the C++ runtime
1386 system to find the list of active handlers, etc. */
1387 fprintf_filtered (gdb_stdout, "Info catch not supported with this target/compiler combination.\n");
1389 if (!deprecated_selected_frame)
1390 error ("No frame selected.");
1395 /* Assume g++ compiled code -- old v 4.16 behaviour */
1396 if (!deprecated_selected_frame)
1397 error ("No frame selected.");
1399 print_frame_label_vars (deprecated_selected_frame, 0, gdb_stdout);
1404 print_frame_arg_vars (register struct frame_info *fi,
1405 register struct ui_file *stream)
1407 struct symbol *func = get_frame_function (fi);
1408 register struct block *b;
1410 register struct symbol *sym, *sym2;
1411 register int values_printed = 0;
1415 fprintf_filtered (stream, "No symbol table info available.\n");
1419 b = SYMBOL_BLOCK_VALUE (func);
1420 ALL_BLOCK_SYMBOLS (b, i, sym)
1422 switch (SYMBOL_CLASS (sym))
1428 case LOC_REGPARM_ADDR:
1429 case LOC_BASEREG_ARG:
1431 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1432 fputs_filtered (" = ", stream);
1434 /* We have to look up the symbol because arguments can have
1435 two entries (one a parameter, one a local) and the one we
1436 want is the local, which lookup_symbol will find for us.
1437 This includes gcc1 (not gcc2) on the sparc when passing a
1438 small structure and gcc2 when the argument type is float
1439 and it is passed as a double and converted to float by
1440 the prologue (in the latter case the type of the LOC_ARG
1441 symbol is double and the type of the LOC_LOCAL symbol is
1442 float). There are also LOC_ARG/LOC_REGISTER pairs which
1443 are not combined in symbol-reading. */
1445 sym2 = lookup_symbol (SYMBOL_NAME (sym),
1446 b, VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL);
1447 print_variable_value (sym2, fi, stream);
1448 fprintf_filtered (stream, "\n");
1452 /* Don't worry about things which aren't arguments. */
1456 if (!values_printed)
1458 fprintf_filtered (stream, "No arguments.\n");
1463 args_info (char *ignore, int from_tty)
1465 if (!deprecated_selected_frame)
1466 error ("No frame selected.");
1467 print_frame_arg_vars (deprecated_selected_frame, gdb_stdout);
1472 args_plus_locals_info (char *ignore, int from_tty)
1474 args_info (ignore, from_tty);
1475 locals_info (ignore, from_tty);
1479 /* Select frame FI. Also print the stack frame and show the source if
1480 this is the tui version. */
1482 select_and_print_frame (struct frame_info *fi)
1487 print_stack_frame (fi, frame_relative_level (fi), 1);
1491 /* Return the symbol-block in which the selected frame is executing.
1492 Can return zero under various legitimate circumstances.
1494 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1495 code address within the block returned. We use this to decide
1496 which macros are in scope. */
1499 get_selected_block (CORE_ADDR *addr_in_block)
1501 if (!target_has_stack)
1504 /* NOTE: cagney/2002-11-28: Why go to all this effort to not create
1505 a selected/current frame? Perhaphs this function is called,
1506 indirectly, by WFI in "infrun.c" where avoiding the creation of
1507 an inner most frame is very important (it slows down single
1508 step). I suspect, though that this was true in the deep dark
1509 past but is no longer the case. A mindless look at all the
1510 callers tends to support this theory. I think we should be able
1511 to assume that there is always a selcted frame. */
1512 /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel
1514 if (!deprecated_selected_frame)
1516 CORE_ADDR pc = read_pc ();
1517 if (addr_in_block != NULL)
1518 *addr_in_block = pc;
1519 return block_for_pc (pc);
1521 return get_frame_block (deprecated_selected_frame, addr_in_block);
1524 /* Find a frame a certain number of levels away from FRAME.
1525 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1526 Positive means go to earlier frames (up); negative, the reverse.
1527 The int that contains the number of levels is counted toward
1528 zero as the frames for those levels are found.
1529 If the top or bottom frame is reached, that frame is returned,
1530 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1531 how much farther the original request asked to go. */
1534 find_relative_frame (register struct frame_info *frame,
1535 register int *level_offset_ptr)
1537 register struct frame_info *prev;
1538 register struct frame_info *frame1;
1540 /* Going up is simple: just do get_prev_frame enough times
1541 or until initial frame is reached. */
1542 while (*level_offset_ptr > 0)
1544 prev = get_prev_frame (frame);
1547 (*level_offset_ptr)--;
1550 /* Going down is just as simple. */
1551 if (*level_offset_ptr < 0)
1553 while (*level_offset_ptr < 0)
1555 frame1 = get_next_frame (frame);
1559 (*level_offset_ptr)++;
1565 /* The "select_frame" command. With no arg, NOP.
1566 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1567 valid level. Otherwise, treat level_exp as an address expression
1568 and select it. See parse_frame_specification for more info on proper
1569 frame expressions. */
1573 select_frame_command_wrapper (char *level_exp, int from_tty)
1575 select_frame_command (level_exp, from_tty);
1579 select_frame_command (char *level_exp, int from_tty)
1581 struct frame_info *frame;
1582 int level = frame_relative_level (deprecated_selected_frame);
1584 if (!target_has_stack)
1585 error ("No stack.");
1587 frame = parse_frame_specification (level_exp);
1589 select_frame (frame);
1590 if (level != frame_relative_level (deprecated_selected_frame))
1591 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame));
1594 /* The "frame" command. With no arg, print selected frame briefly.
1595 With arg, behaves like select_frame and then prints the selected
1599 frame_command (char *level_exp, int from_tty)
1601 select_frame_command (level_exp, from_tty);
1602 show_and_print_stack_frame (deprecated_selected_frame,
1603 frame_relative_level (deprecated_selected_frame), 1);
1606 /* The XDB Compatibility command to print the current frame. */
1609 current_frame_command (char *level_exp, int from_tty)
1611 if (target_has_stack == 0 || deprecated_selected_frame == 0)
1612 error ("No stack.");
1613 print_only_stack_frame (deprecated_selected_frame,
1614 frame_relative_level (deprecated_selected_frame), 1);
1617 /* Select the frame up one or COUNT stack levels
1618 from the previously selected frame, and print it briefly. */
1622 up_silently_base (char *count_exp)
1624 register struct frame_info *fi;
1625 int count = 1, count1;
1627 count = parse_and_eval_long (count_exp);
1630 if (target_has_stack == 0 || deprecated_selected_frame == 0)
1631 error ("No stack.");
1633 fi = find_relative_frame (deprecated_selected_frame, &count1);
1634 if (count1 != 0 && count_exp == 0)
1635 error ("Initial frame selected; you cannot go up.");
1637 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame));
1641 up_silently_command (char *count_exp, int from_tty)
1643 up_silently_base (count_exp);
1647 up_command (char *count_exp, int from_tty)
1649 up_silently_base (count_exp);
1650 show_and_print_stack_frame (deprecated_selected_frame,
1651 frame_relative_level (deprecated_selected_frame), 1);
1654 /* Select the frame down one or COUNT stack levels
1655 from the previously selected frame, and print it briefly. */
1659 down_silently_base (char *count_exp)
1661 register struct frame_info *frame;
1662 int count = -1, count1;
1664 count = -parse_and_eval_long (count_exp);
1667 if (target_has_stack == 0 || deprecated_selected_frame == 0)
1668 error ("No stack.");
1670 frame = find_relative_frame (deprecated_selected_frame, &count1);
1671 if (count1 != 0 && count_exp == 0)
1674 /* We only do this if count_exp is not specified. That way "down"
1675 means to really go down (and let me know if that is
1676 impossible), but "down 9999" can be used to mean go all the way
1677 down without getting an error. */
1679 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1682 select_frame (frame);
1683 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame));
1688 down_silently_command (char *count_exp, int from_tty)
1690 down_silently_base (count_exp);
1694 down_command (char *count_exp, int from_tty)
1696 down_silently_base (count_exp);
1697 show_and_print_stack_frame (deprecated_selected_frame,
1698 frame_relative_level (deprecated_selected_frame), 1);
1702 return_command (char *retval_exp, int from_tty)
1704 struct symbol *thisfun;
1705 CORE_ADDR selected_frame_addr;
1706 CORE_ADDR selected_frame_pc;
1707 struct frame_info *frame;
1708 struct value *return_value = NULL;
1710 if (deprecated_selected_frame == NULL)
1711 error ("No selected frame.");
1712 thisfun = get_frame_function (deprecated_selected_frame);
1713 selected_frame_addr = get_frame_base (deprecated_selected_frame);
1714 selected_frame_pc = get_frame_pc (deprecated_selected_frame);
1716 /* Compute the return value (if any -- possibly getting errors here). */
1720 struct type *return_type = NULL;
1722 return_value = parse_and_eval (retval_exp);
1724 /* Cast return value to the return type of the function. */
1725 if (thisfun != NULL)
1726 return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun));
1727 if (return_type == NULL)
1728 return_type = builtin_type_int;
1729 return_value = value_cast (return_type, return_value);
1731 /* Make sure we have fully evaluated it, since
1732 it might live in the stack frame we're about to pop. */
1733 if (VALUE_LAZY (return_value))
1734 value_fetch_lazy (return_value);
1737 /* If interactive, require confirmation. */
1743 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun)))
1745 error ("Not confirmed.");
1749 else if (!query ("Make selected stack frame return now? "))
1750 error ("Not confirmed.");
1753 /* Do the real work. Pop until the specified frame is current. We
1754 use this method because the deprecated_selected_frame is not valid after
1755 a POP_FRAME. The pc comparison makes this work even if the
1756 selected frame shares its fp with another frame. */
1758 while (selected_frame_addr != get_frame_base (frame = get_current_frame ())
1759 || selected_frame_pc != get_frame_pc (frame))
1762 /* Then pop that frame. */
1766 /* Compute the return value (if any) and store in the place
1767 for return values. */
1770 set_return_value (return_value);
1772 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1774 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1775 get_frame_base (get_current_frame ())))
1778 /* If interactive, print the frame that is now current. */
1781 frame_command ("0", 1);
1783 select_frame_command ("0", 0);
1786 /* Sets the scope to input function name, provided that the
1787 function is within the current stack frame */
1789 struct function_bounds
1791 CORE_ADDR low, high;
1794 static void func_command (char *arg, int from_tty);
1796 func_command (char *arg, int from_tty)
1798 struct frame_info *fp;
1800 struct symtabs_and_lines sals;
1803 struct function_bounds *func_bounds = (struct function_bounds *) NULL;
1805 if (arg != (char *) NULL)
1808 fp = parse_frame_specification ("0");
1809 sals = decode_line_spec (arg, 1);
1810 func_bounds = (struct function_bounds *) xmalloc (
1811 sizeof (struct function_bounds) * sals.nelts);
1812 for (i = 0; (i < sals.nelts && !found); i++)
1814 if (sals.sals[i].pc == (CORE_ADDR) 0 ||
1815 find_pc_partial_function (sals.sals[i].pc,
1817 &func_bounds[i].low,
1818 &func_bounds[i].high) == 0)
1820 func_bounds[i].low =
1821 func_bounds[i].high = (CORE_ADDR) NULL;
1827 for (i = 0; (i < sals.nelts && !found); i++)
1828 found = (get_frame_pc (fp) >= func_bounds[i].low &&
1829 get_frame_pc (fp) < func_bounds[i].high);
1833 fp = find_relative_frame (fp, &level);
1836 while (!found && level == 0);
1839 xfree (func_bounds);
1842 printf_filtered ("'%s' not within current stack frame.\n", arg);
1843 else if (fp != deprecated_selected_frame)
1844 select_and_print_frame (fp);
1847 /* Gets the language of the current frame. */
1850 get_frame_language (void)
1852 register struct symtab *s;
1853 enum language flang; /* The language of the current frame */
1855 if (deprecated_selected_frame)
1857 s = find_pc_symtab (get_frame_pc (deprecated_selected_frame));
1859 flang = s->language;
1861 flang = language_unknown;
1864 flang = language_unknown;
1870 _initialize_stack (void)
1873 backtrace_limit = 30;
1876 add_com ("return", class_stack, return_command,
1877 "Make selected stack frame return to its caller.\n\
1878 Control remains in the debugger, but when you continue\n\
1879 execution will resume in the frame above the one now selected.\n\
1880 If an argument is given, it is an expression for the value to return.");
1882 add_com ("up", class_stack, up_command,
1883 "Select and print stack frame that called this one.\n\
1884 An argument says how many frames up to go.");
1885 add_com ("up-silently", class_support, up_silently_command,
1886 "Same as the `up' command, but does not print anything.\n\
1887 This is useful in command scripts.");
1889 add_com ("down", class_stack, down_command,
1890 "Select and print stack frame called by this one.\n\
1891 An argument says how many frames down to go.");
1892 add_com_alias ("do", "down", class_stack, 1);
1893 add_com_alias ("dow", "down", class_stack, 1);
1894 add_com ("down-silently", class_support, down_silently_command,
1895 "Same as the `down' command, but does not print anything.\n\
1896 This is useful in command scripts.");
1898 add_com ("frame", class_stack, frame_command,
1899 "Select and print a stack frame.\n\
1900 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1901 An argument specifies the frame to select.\n\
1902 It can be a stack frame number or the address of the frame.\n\
1903 With argument, nothing is printed if input is coming from\n\
1904 a command file or a user-defined command.");
1906 add_com_alias ("f", "frame", class_stack, 1);
1910 add_com ("L", class_stack, current_frame_command,
1911 "Print the current stack frame.\n");
1912 add_com_alias ("V", "frame", class_stack, 1);
1914 add_com ("select-frame", class_stack, select_frame_command,
1915 "Select a stack frame without printing anything.\n\
1916 An argument specifies the frame to select.\n\
1917 It can be a stack frame number or the address of the frame.\n");
1919 add_com ("backtrace", class_stack, backtrace_command,
1920 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1921 With a negative argument, print outermost -COUNT frames.\n\
1922 Use of the 'full' qualifier also prints the values of the local variables.\n");
1923 add_com_alias ("bt", "backtrace", class_stack, 0);
1926 add_com_alias ("t", "backtrace", class_stack, 0);
1927 add_com ("T", class_stack, backtrace_full_command,
1928 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1929 and the values of the local variables.\n\
1930 With a negative argument, print outermost -COUNT frames.\n\
1931 Usage: T <count>\n");
1934 add_com_alias ("where", "backtrace", class_alias, 0);
1935 add_info ("stack", backtrace_command,
1936 "Backtrace of the stack, or innermost COUNT frames.");
1937 add_info_alias ("s", "stack", 1);
1938 add_info ("frame", frame_info,
1939 "All about selected stack frame, or frame at ADDR.");
1940 add_info_alias ("f", "frame", 1);
1941 add_info ("locals", locals_info,
1942 "Local variables of current stack frame.");
1943 add_info ("args", args_info,
1944 "Argument variables of current stack frame.");
1946 add_com ("l", class_info, args_plus_locals_info,
1947 "Argument and local variables of current stack frame.");
1950 add_com ("func", class_stack, func_command,
1951 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
1953 add_info ("catch", catch_info,
1954 "Exceptions that can be caught in the current stack frame.");
1957 add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command,
1958 "Specify maximum number of frames for \"backtrace\" to print by default.",
1960 add_info ("backtrace-limit", backtrace_limit_info,
1961 "The maximum number of frames for \"backtrace\" to print by default.");