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 /* Prototypes for local functions. */
55 static void return_command (char *, int);
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 /* The "selected" stack frame is used by default for local and arg access.
114 May be zero, for no selected frame. */
116 struct frame_info *selected_frame;
118 /* Level of the selected frame:
119 0 for innermost, 1 for its caller, ...
120 or -1 for frame specified by address with no defined level. */
122 /* Level of the selected frame: 0 for innermost, 1 for its caller, ...
123 or -1 for NULL frame. */
126 frame_relative_level (struct frame_info *fi)
134 /* Zero means do things normally; we are interacting directly with the
135 user. One means print the full filename and linenumber when a
136 frame is printed, and do so in a format emacs18/emacs19.22 can
137 parse. Two means print similar annotations, but in many more
138 cases and in a slightly different syntax. */
140 int annotation_level = 0;
143 struct print_stack_frame_args
145 struct frame_info *fi;
151 static int print_stack_frame_base_stub (char *);
153 /* Show and print the frame arguments.
154 Pass the args the way catch_errors wants them. */
155 static int show_and_print_stack_frame_stub (void *args);
157 show_and_print_stack_frame_stub (void *args)
159 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
161 print_frame_info (p->fi, p->level, p->source, p->args);
166 /* Show or print the frame arguments.
167 Pass the args the way catch_errors wants them. */
168 static int print_stack_frame_stub (void *args);
170 print_stack_frame_stub (void *args)
172 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
174 print_frame_info_base (p->fi, p->level, p->source, p->args);
178 /* Print a stack frame briefly. FRAME_INFI should be the frame info
179 and LEVEL should be its level in the stack (or -1 for level not
182 /* Pass the args the way catch_errors wants them. */
184 print_stack_frame_base_stub (char *args)
186 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
188 print_frame_info_base (p->fi, p->level, p->source, p->args);
192 /* print the frame arguments to the terminal.
193 Pass the args the way catch_errors wants them. */
194 static int print_only_stack_frame_stub (void *);
196 print_only_stack_frame_stub (void *args)
198 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
200 print_frame_info_base (p->fi, p->level, p->source, p->args);
204 /* Print a stack frame briefly. FRAME_INFI should be the frame info
205 and LEVEL should be its level in the stack (or -1 for level not defined).
206 This prints the level, the function executing, the arguments,
207 and the file name and line number.
208 If the pc is not at the beginning of the source line,
209 the actual pc is printed at the beginning.
211 If SOURCE is 1, print the source line as well.
212 If SOURCE is -1, print ONLY the source line. */
215 print_stack_frame_base (struct frame_info *fi, int level, int source)
217 struct print_stack_frame_args args;
221 args.source = source;
224 catch_errors (print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
227 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
228 and LEVEL should be its level in the stack (or -1 for level not defined).
229 This prints the level, the function executing, the arguments,
230 and the file name and line number.
231 If the pc is not at the beginning of the source line,
232 the actual pc is printed at the beginning.
234 If SOURCE is 1, print the source line as well.
235 If SOURCE is -1, print ONLY the source line. */
238 show_and_print_stack_frame (struct frame_info *fi, int level, int source)
240 struct print_stack_frame_args args;
244 args.source = source;
247 catch_errors (show_and_print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
251 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
252 and LEVEL should be its level in the stack (or -1 for level not defined).
253 This prints the level, the function executing, the arguments,
254 and the file name and line number.
255 If the pc is not at the beginning of the source line,
256 the actual pc is printed at the beginning.
258 If SOURCE is 1, print the source line as well.
259 If SOURCE is -1, print ONLY the source line. */
262 print_stack_frame (struct frame_info *fi, int level, int source)
264 struct print_stack_frame_args args;
268 args.source = source;
271 catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL);
274 /* Print a stack frame briefly. FRAME_INFI should be the frame info
275 and LEVEL should be its level in the stack (or -1 for level not defined).
276 This prints the level, the function executing, the arguments,
277 and the file name and line number.
278 If the pc is not at the beginning of the source line,
279 the actual pc is printed at the beginning.
281 If SOURCE is 1, print the source line as well.
282 If SOURCE is -1, print ONLY the source line. */
285 print_only_stack_frame (struct frame_info *fi, int level, int source)
287 struct print_stack_frame_args args;
291 args.source = source;
294 catch_errors (print_only_stack_frame_stub, &args, "", RETURN_MASK_ALL);
297 struct print_args_args
300 struct frame_info *fi;
301 struct ui_file *stream;
304 static int print_args_stub (PTR);
306 /* Pass the args the way catch_errors wants them. */
309 print_args_stub (PTR args)
312 struct print_args_args *p = (struct print_args_args *) args;
314 numargs = FRAME_NUM_ARGS (p->fi);
315 print_frame_args (p->func, p->fi, numargs, p->stream);
319 /* Print information about a frame for frame "fi" at level "level".
320 Used in "where" output, also used to emit breakpoint or step
322 LEVEL is the level of the frame, or -1 if it is the
323 innermost frame but we don't want to print the level.
324 The meaning of the SOURCE argument is:
325 SRC_LINE: Print only source line
326 LOCATION: Print only location
327 LOC_AND_SRC: Print location and source line. */
330 print_frame_info_base (struct frame_info *fi, int level, int source, int args)
332 struct symtab_and_line sal;
337 char buf[MAX_REGISTER_RAW_SIZE];
340 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
342 /* Get the value of SP_REGNUM relative to the frame. */
343 get_saved_register (buf, (int *) NULL, (CORE_ADDR *) NULL,
344 FRAME_INFO_ID (fi), SP_REGNUM, (enum lval_type *) NULL);
345 sp = extract_address (buf, REGISTER_RAW_SIZE (SP_REGNUM));
347 /* This is not a perfect test, because if a function alloca's some
348 memory, puts some code there, and then jumps into it, then the test
349 will succeed even though there is no call dummy. Probably best is
350 to check for a bp_call_dummy breakpoint. */
351 if (PC_IN_CALL_DUMMY (fi->pc, sp, fi->frame))
353 if (frame_in_dummy (fi))
356 annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
358 /* Do this regardless of SOURCE because we don't have any source
359 to list for this frame. */
361 printf_filtered ("#%-2d ", level);
362 annotate_function_call ();
363 printf_filtered ("<function called from gdb>\n");
364 annotate_frame_end ();
367 if (fi->signal_handler_caller)
369 annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
371 /* Do this regardless of SOURCE because we don't have any source
372 to list for this frame. */
374 printf_filtered ("#%-2d ", level);
375 annotate_signal_handler_caller ();
376 printf_filtered ("<signal handler called>\n");
377 annotate_frame_end ();
381 /* If fi is not the innermost frame, that normally means that fi->pc
382 points to *after* the call instruction, and we want to get the line
383 containing the call, never the next line. But if the next frame is
384 a signal_handler_caller or a dummy frame, then the next frame was
385 not entered as the result of a call, and we want to get the line
386 containing fi->pc. */
388 find_pc_line (fi->pc,
390 && !fi->next->signal_handler_caller
391 && !frame_in_dummy (fi->next));
393 location_print = (source == LOCATION
394 || source == LOC_AND_ADDRESS
395 || source == SRC_AND_LOC);
397 if (location_print || !sal.symtab)
398 print_frame (fi, level, source, args, sal);
400 source_print = (source == SRC_LINE || source == SRC_AND_LOC);
403 set_current_source_symtab_and_line (&sal);
405 if (source_print && sal.symtab)
407 struct symtab_and_line cursal;
409 int mid_statement = (source == SRC_LINE) && (fi->pc != sal.pc);
411 if (annotation_level)
412 done = identify_source_line (sal.symtab, sal.line, mid_statement,
416 if (print_frame_info_listing_hook)
417 print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0);
420 /* We used to do this earlier, but that is clearly
421 wrong. This function is used by many different
422 parts of gdb, including normal_stop in infrun.c,
423 which uses this to print out the current PC
424 when we stepi/nexti into the middle of a source
425 line. Only the command line really wants this
426 behavior. Other UIs probably would like the
427 ability to decide for themselves if it is desired. */
428 if (addressprint && mid_statement)
430 ui_out_field_core_addr (uiout, "addr", fi->pc);
431 ui_out_text (uiout, "\t");
434 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
437 cursal = get_current_or_default_source_symtab_and_line ();
438 cursal.line = max (sal.line - get_lines_to_list () / 2, 1);
439 set_current_source_symtab_and_line (&cursal);
443 set_default_breakpoint (1, fi->pc, sal.symtab, sal.line);
445 annotate_frame_end ();
447 gdb_flush (gdb_stdout);
451 print_frame (struct frame_info *fi,
455 struct symtab_and_line sal)
458 register char *funname = 0;
459 enum language funlang = language_unknown;
460 struct ui_stream *stb;
461 struct cleanup *old_chain;
462 struct cleanup *list_chain;
464 stb = ui_out_stream_new (uiout);
465 old_chain = make_cleanup_ui_out_stream_delete (stb);
467 func = find_pc_function (frame_address_in_block (fi));
470 /* In certain pathological cases, the symtabs give the wrong
471 function (when we are in the first function in a file which
472 is compiled without debugging symbols, the previous function
473 is compiled with debugging symbols, and the "foo.o" symbol
474 that is supposed to tell us where the file with debugging symbols
475 ends has been truncated by ar because it is longer than 15
476 characters). This also occurs if the user uses asm() to create
477 a function but not stabs for it (in a file compiled -g).
479 So look in the minimal symbol tables as well, and if it comes
480 up with a larger address for the function use that instead.
481 I don't think this can ever cause any problems; there shouldn't
482 be any minimal symbols in the middle of a function; if this is
483 ever changed many parts of GDB will need to be changed (and we'll
484 create a find_pc_minimal_function or some such). */
486 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (frame_address_in_block (fi));
488 && (SYMBOL_VALUE_ADDRESS (msymbol)
489 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
492 /* There is no particular reason to think the line number
493 information is wrong. Someone might have just put in
494 a label with asm() but left the line numbers alone. */
495 /* In this case we have no way of knowing the source file
496 and line number, so don't print them. */
499 /* We also don't know anything about the function besides
500 its address and name. */
502 funname = SYMBOL_NAME (msymbol);
503 funlang = SYMBOL_LANGUAGE (msymbol);
507 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
508 demangled name that we already have stored in the symbol
509 table, but we stored a version with DMGL_PARAMS turned
510 on, and here we don't want to display parameters. So call
511 the demangler again, with DMGL_ANSI only. (Yes, I know
512 that printf_symbol_filtered() will again try to demangle
513 the name on the fly, but the issue is that if
514 cplus_demangle() fails here, it'll fail there too. So we
515 want to catch the failure ("demangled==NULL" case below)
516 here, while we still have our hands on the function
519 funname = SYMBOL_NAME (func);
520 funlang = SYMBOL_LANGUAGE (func);
521 if (funlang == language_cplus)
523 demangled = cplus_demangle (funname, DMGL_ANSI);
524 if (demangled == NULL)
525 /* If the demangler fails, try the demangled name from
526 the symbol table. This'll have parameters, but
527 that's preferable to diplaying a mangled name. */
528 funname = SYMBOL_SOURCE_NAME (func);
534 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (frame_address_in_block (fi));
537 funname = SYMBOL_NAME (msymbol);
538 funlang = SYMBOL_LANGUAGE (msymbol);
542 annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
544 list_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
548 ui_out_text (uiout, "#");
549 ui_out_field_fmt (uiout, "level", "%-2d", level);
550 ui_out_spaces (uiout, 1);
553 if (fi->pc != sal.pc || !sal.symtab || source == LOC_AND_ADDRESS)
555 annotate_frame_address ();
556 ui_out_field_core_addr (uiout, "addr", fi->pc);
557 annotate_frame_address_end ();
558 ui_out_text (uiout, " in ");
560 annotate_frame_function_name ();
561 fprintf_symbol_filtered (stb->stream, funname ? funname : "??", funlang,
563 ui_out_field_stream (uiout, "func", stb);
564 ui_out_wrap_hint (uiout, " ");
565 annotate_frame_args ();
567 ui_out_text (uiout, " (");
570 struct print_args_args args;
571 struct cleanup *args_list_chain;
574 args.stream = gdb_stdout;
575 args_list_chain = make_cleanup_ui_out_list_begin_end (uiout, "args");
576 catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL);
577 /* FIXME: args must be a list. If one argument is a string it will
578 have " that will not be properly escaped. */
579 /* Invoke ui_out_tuple_end. */
580 do_cleanups (args_list_chain);
583 ui_out_text (uiout, ")");
584 if (sal.symtab && sal.symtab->filename)
586 annotate_frame_source_begin ();
587 ui_out_wrap_hint (uiout, " ");
588 ui_out_text (uiout, " at ");
589 annotate_frame_source_file ();
590 ui_out_field_string (uiout, "file", sal.symtab->filename);
591 annotate_frame_source_file_end ();
592 ui_out_text (uiout, ":");
593 annotate_frame_source_line ();
594 ui_out_field_int (uiout, "line", sal.line);
595 annotate_frame_source_end ();
599 if (!funname || (!sal.symtab || !sal.symtab->filename))
601 char *lib = PC_SOLIB (fi->pc);
604 annotate_frame_where ();
605 ui_out_wrap_hint (uiout, " ");
606 ui_out_text (uiout, " from ");
607 ui_out_field_string (uiout, "from", lib);
610 #endif /* PC_SOLIB */
612 /* do_cleanups will call ui_out_tuple_end() for us. */
613 do_cleanups (list_chain);
614 ui_out_text (uiout, "\n");
615 do_cleanups (old_chain);
619 /* Show or print the frame info. If this is the tui, it will be shown in
620 the source display */
622 print_frame_info (struct frame_info *fi, register int level, int source,
625 print_frame_info_base (fi, level, source, args);
628 /* Show the frame info. If this is the tui, it will be shown in
629 the source display otherwise, nothing is done */
631 show_stack_frame (struct frame_info *fi)
636 /* Read a frame specification in whatever the appropriate format is.
637 Call error() if the specification is in any way invalid (i.e.
638 this function never returns NULL). */
641 parse_frame_specification (char *frame_exp)
645 CORE_ADDR args[MAXARGS];
650 char *addr_string, *p;
651 struct cleanup *tmp_cleanup;
653 while (*frame_exp == ' ')
658 if (numargs > MAXARGS)
659 error ("Too many args in frame specification");
660 /* Parse an argument. */
661 for (p = frame_exp; *p && *p != ' '; p++)
663 addr_string = savestring (frame_exp, p - frame_exp);
668 tmp_cleanup = make_cleanup (xfree, addr_string);
670 /* NOTE: we call parse_and_eval and then both
671 value_as_long and value_as_address rather than calling
672 parse_and_eval_long and parse_and_eval_address because
673 of the issue of potential side effects from evaluating
675 vp = parse_and_eval (addr_string);
677 level = value_as_long (vp);
679 args[numargs++] = value_as_address (vp);
680 do_cleanups (tmp_cleanup);
683 /* Skip spaces, move to possible next arg. */
693 if (selected_frame == NULL)
694 error ("No selected frame.");
695 return selected_frame;
699 struct frame_info *fid =
700 find_relative_frame (get_current_frame (), &level);
701 struct frame_info *tfid;
704 /* find_relative_frame was successful */
707 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
708 take at least 2 addresses. It is important to detect this case
709 here so that "frame 100" does not give a confusing error message
710 like "frame specification requires two addresses". This of course
711 does not solve the "frame 100" problem for machines on which
712 a frame specification can be made with one address. To solve
713 that, we need a new syntax for a specifying a frame by address.
714 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
715 two args, etc.), but people might think that is too much typing,
716 so I guess *0x23,0x45 would be a possible alternative (commas
717 really should be used instead of spaces to delimit; using spaces
718 normally works in an expression). */
719 #ifdef SETUP_ARBITRARY_FRAME
720 error ("No frame %s", paddr_d (args[0]));
723 /* If (s)he specifies the frame with an address, he deserves what
724 (s)he gets. Still, give the highest one that matches. */
726 for (fid = get_current_frame ();
727 fid && fid->frame != args[0];
728 fid = get_prev_frame (fid))
732 while ((tfid = get_prev_frame (fid)) &&
733 (tfid->frame == args[0]))
736 /* We couldn't identify the frame as an existing frame, but
737 perhaps we can create one with a single argument. */
741 #ifdef SETUP_ARBITRARY_FRAME
742 return SETUP_ARBITRARY_FRAME (numargs, args);
744 /* Usual case. Do it here rather than have everyone supply
745 a SETUP_ARBITRARY_FRAME that does this. */
747 return create_new_frame (args[0], 0);
748 error ("Too many args in frame specification");
755 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
756 that if it is unsure about the answer, it returns 0
757 instead of guessing (this happens on the VAX and i960, for example).
759 On most machines, we never have to guess about the args address,
760 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
761 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
762 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
765 /* Print verbosely the selected frame or the frame at address ADDR.
766 This means absolutely all information in the frame is printed. */
769 frame_info (char *addr_exp, int from_tty)
771 struct frame_info *fi;
772 struct symtab_and_line sal;
775 struct frame_info *calling_frame_info;
776 int i, count, numregs;
778 enum language funlang = language_unknown;
780 if (!target_has_stack)
783 fi = parse_frame_specification (addr_exp);
785 error ("Invalid frame specified.");
787 sal = find_pc_line (fi->pc,
789 && !fi->next->signal_handler_caller
790 && !frame_in_dummy (fi->next));
791 func = get_frame_function (fi);
792 s = find_pc_symtab (fi->pc);
795 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
796 * the demangled name that we already have stored in
797 * the symbol table, but we stored a version with
798 * DMGL_PARAMS turned on, and here we don't want
799 * to display parameters. So call the demangler again,
800 * with DMGL_ANSI only. RT
801 * (Yes, I know that printf_symbol_filtered() will
802 * again try to demangle the name on the fly, but
803 * the issue is that if cplus_demangle() fails here,
804 * it'll fail there too. So we want to catch the failure
805 * ("demangled==NULL" case below) here, while we still
806 * have our hands on the function symbol.)
809 funname = SYMBOL_NAME (func);
810 funlang = SYMBOL_LANGUAGE (func);
811 if (funlang == language_cplus)
813 demangled = cplus_demangle (funname, DMGL_ANSI);
814 /* If the demangler fails, try the demangled name
815 * from the symbol table. This'll have parameters,
816 * but that's preferable to diplaying a mangled name.
818 if (demangled == NULL)
819 funname = SYMBOL_SOURCE_NAME (func);
824 register struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
827 funname = SYMBOL_NAME (msymbol);
828 funlang = SYMBOL_LANGUAGE (msymbol);
831 calling_frame_info = get_prev_frame (fi);
833 if (!addr_exp && frame_relative_level (selected_frame) >= 0)
835 printf_filtered ("Stack level %d, frame at ",
836 frame_relative_level (selected_frame));
837 print_address_numeric (fi->frame, 1, gdb_stdout);
838 printf_filtered (":\n");
842 printf_filtered ("Stack frame at ");
843 print_address_numeric (fi->frame, 1, gdb_stdout);
844 printf_filtered (":\n");
846 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM));
847 print_address_numeric (fi->pc, 1, gdb_stdout);
852 printf_filtered (" in ");
853 fprintf_symbol_filtered (gdb_stdout, funname, funlang,
854 DMGL_ANSI | DMGL_PARAMS);
858 printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line);
859 puts_filtered ("; ");
861 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM));
862 print_address_numeric (FRAME_SAVED_PC (fi), 1, gdb_stdout);
863 printf_filtered ("\n");
867 frameless = FRAMELESS_FUNCTION_INVOCATION (fi);
869 printf_filtered (" (FRAMELESS),");
872 if (calling_frame_info)
874 printf_filtered (" called by frame at ");
875 print_address_numeric (calling_frame_info->frame, 1, gdb_stdout);
877 if (fi->next && calling_frame_info)
882 printf_filtered (" caller of frame at ");
883 print_address_numeric (fi->next->frame, 1, gdb_stdout);
885 if (fi->next || calling_frame_info)
886 puts_filtered ("\n");
888 printf_filtered (" source language %s.\n", language_str (s->language));
890 #ifdef PRINT_EXTRA_FRAME_INFO
891 PRINT_EXTRA_FRAME_INFO (fi);
895 /* Address of the argument list for this frame, or 0. */
896 CORE_ADDR arg_list = FRAME_ARGS_ADDRESS_CORRECT (fi);
897 /* Number of args for this frame, or -1 if unknown. */
901 printf_filtered (" Arglist at unknown address.\n");
904 printf_filtered (" Arglist at ");
905 print_address_numeric (arg_list, 1, gdb_stdout);
906 printf_filtered (",");
908 numargs = FRAME_NUM_ARGS (fi);
910 puts_filtered (" args: ");
911 else if (numargs == 0)
912 puts_filtered (" no args.");
913 else if (numargs == 1)
914 puts_filtered (" 1 arg: ");
916 printf_filtered (" %d args: ", numargs);
917 print_frame_args (func, fi, numargs, gdb_stdout);
918 puts_filtered ("\n");
922 /* Address of the local variables for this frame, or 0. */
923 CORE_ADDR arg_list = FRAME_LOCALS_ADDRESS (fi);
926 printf_filtered (" Locals at unknown address,");
929 printf_filtered (" Locals at ");
930 print_address_numeric (arg_list, 1, gdb_stdout);
931 printf_filtered (",");
935 if (fi->saved_regs == NULL)
936 FRAME_INIT_SAVED_REGS (fi);
937 /* Print as much information as possible on the location of all the
948 /* The sp is special; what's displayed isn't the save address, but
949 the value of the previous frame's sp. This is a legacy thing,
950 at one stage the frame cached the previous frame's SP instead
951 of its address, hence it was easiest to just display the cached
955 /* Find out the location of the saved stack pointer with out
956 actually evaluating it. */
957 frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr,
959 if (!optimized && lval == not_lval)
961 void *value = alloca (MAX_REGISTER_RAW_SIZE);
963 frame_register_unwind (fi, SP_REGNUM, &optimized, &lval, &addr,
965 sp = extract_address (value, REGISTER_RAW_SIZE (SP_REGNUM));
966 printf_filtered (" Previous frame's sp is ");
967 print_address_numeric (sp, 1, gdb_stdout);
968 printf_filtered ("\n");
971 else if (!optimized && lval == lval_memory)
973 printf_filtered (" Previous frame's sp at ");
974 print_address_numeric (addr, 1, gdb_stdout);
975 printf_filtered ("\n");
978 else if (!optimized && lval == lval_register)
980 printf_filtered (" Previous frame's sp in %s\n",
981 REGISTER_NAME (realnum));
984 /* else keep quiet. */
988 numregs = NUM_REGS + NUM_PSEUDO_REGS;
989 for (i = 0; i < numregs; i++)
992 /* Find out the location of the saved register without
993 fetching the corresponding value. */
994 frame_register_unwind (fi, i, &optimized, &lval, &addr, &realnum,
996 /* For moment, only display registers that were saved on the
998 if (!optimized && lval == lval_memory)
1001 puts_filtered (" Saved registers:\n ");
1003 puts_filtered (",");
1005 printf_filtered (" %s at ", REGISTER_NAME (i));
1006 print_address_numeric (addr, 1, gdb_stdout);
1010 if (count || need_nl)
1011 puts_filtered ("\n");
1016 /* Set a limit on the number of frames printed by default in a
1019 static int backtrace_limit;
1022 set_backtrace_limit_command (char *count_exp, int from_tty)
1024 int count = parse_and_eval_long (count_exp);
1027 error ("Negative argument not meaningful as backtrace limit.");
1029 backtrace_limit = count;
1033 backtrace_limit_info (char *arg, int from_tty)
1036 error ("\"Info backtrace-limit\" takes no arguments.");
1038 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit);
1042 /* Print briefly all stack frames or just the innermost COUNT frames. */
1044 static void backtrace_command_1 (char *count_exp, int show_locals,
1047 backtrace_command_1 (char *count_exp, int show_locals, int from_tty)
1049 struct frame_info *fi;
1052 register struct frame_info *trailing;
1053 register int trailing_level;
1055 if (!target_has_stack)
1056 error ("No stack.");
1058 /* The following code must do two things. First, it must
1059 set the variable TRAILING to the frame from which we should start
1060 printing. Second, it must set the variable count to the number
1061 of frames which we should print, or -1 if all of them. */
1062 trailing = get_current_frame ();
1064 /* The target can be in a state where there is no valid frames
1065 (e.g., just connected). */
1066 if (trailing == NULL)
1067 error ("No stack.");
1072 count = parse_and_eval_long (count_exp);
1075 struct frame_info *current;
1080 while (current && count--)
1083 current = get_prev_frame (current);
1086 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1087 will be COUNT below it. */
1091 trailing = get_prev_frame (trailing);
1092 current = get_prev_frame (current);
1104 struct partial_symtab *ps;
1106 /* Read in symbols for all of the frames. Need to do this in
1107 a separate pass so that "Reading in symbols for xxx" messages
1108 don't screw up the appearance of the backtrace. Also
1109 if people have strong opinions against reading symbols for
1110 backtrace this may have to be an option. */
1114 fi = get_prev_frame (fi))
1117 ps = find_pc_psymtab (frame_address_in_block (fi));
1119 PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */
1123 for (i = 0, fi = trailing;
1125 i++, fi = get_prev_frame (fi))
1129 /* Don't use print_stack_frame; if an error() occurs it probably
1130 means further attempts to backtrace would fail (on the other
1131 hand, perhaps the code does or could be fixed to make sure
1132 the frame->prev field gets set to NULL in that case). */
1133 print_frame_info_base (fi, trailing_level + i, 0, 1);
1135 print_frame_local_vars (fi, 1, gdb_stdout);
1138 /* If we've stopped before the end, mention that. */
1140 printf_filtered ("(More stack frames follow...)\n");
1144 backtrace_command (char *arg, int from_tty)
1146 struct cleanup *old_chain = (struct cleanup *) NULL;
1147 char **argv = (char **) NULL;
1148 int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0;
1151 if (arg != (char *) NULL)
1155 argv = buildargv (arg);
1156 old_chain = make_cleanup_freeargv (argv);
1158 for (i = 0; (argv[i] != (char *) NULL); i++)
1162 for (j = 0; (j < strlen (argv[i])); j++)
1163 argv[i][j] = tolower (argv[i][j]);
1165 if (argIndicatingFullTrace < 0 && subset_compare (argv[i], "full"))
1166 argIndicatingFullTrace = argc;
1170 totArgLen += strlen (argv[i]);
1174 if (argIndicatingFullTrace >= 0)
1178 argPtr = (char *) xmalloc (totArgLen + 1);
1183 memset (argPtr, 0, totArgLen + 1);
1184 for (i = 0; (i < (argc + 1)); i++)
1186 if (i != argIndicatingFullTrace)
1188 strcat (argPtr, argv[i]);
1189 strcat (argPtr, " ");
1195 argPtr = (char *) NULL;
1199 backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty);
1201 if (argIndicatingFullTrace >= 0 && totArgLen > 0)
1205 do_cleanups (old_chain);
1208 static void backtrace_full_command (char *arg, int from_tty);
1210 backtrace_full_command (char *arg, int from_tty)
1212 backtrace_command_1 (arg, 1, from_tty);
1216 /* Print the local variables of a block B active in FRAME.
1217 Return 1 if any variables were printed; 0 otherwise. */
1220 print_block_frame_locals (struct block *b, register struct frame_info *fi,
1221 int num_tabs, register struct ui_file *stream)
1224 register struct symbol *sym;
1225 register int values_printed = 0;
1227 ALL_BLOCK_SYMBOLS (b, i, sym)
1229 switch (SYMBOL_CLASS (sym))
1236 for (j = 0; j < num_tabs; j++)
1237 fputs_filtered ("\t", stream);
1238 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1239 fputs_filtered (" = ", stream);
1240 print_variable_value (sym, fi, stream);
1241 fprintf_filtered (stream, "\n");
1245 /* Ignore symbols which are not locals. */
1249 return values_printed;
1252 /* Same, but print labels. */
1255 print_block_frame_labels (struct block *b, int *have_default,
1256 register struct ui_file *stream)
1259 register struct symbol *sym;
1260 register int values_printed = 0;
1262 ALL_BLOCK_SYMBOLS (b, i, sym)
1264 if (STREQ (SYMBOL_NAME (sym), "default"))
1270 if (SYMBOL_CLASS (sym) == LOC_LABEL)
1272 struct symtab_and_line sal;
1273 sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
1275 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1278 fprintf_filtered (stream, " ");
1279 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, stream);
1281 fprintf_filtered (stream, " in file %s, line %d\n",
1282 sal.symtab->filename, sal.line);
1285 return values_printed;
1288 /* Print on STREAM all the local variables in frame FRAME,
1289 including all the blocks active in that frame
1292 Returns 1 if the job was done,
1293 or 0 if nothing was printed because we have no info
1294 on the function running in FRAME. */
1297 print_frame_local_vars (register struct frame_info *fi, register int num_tabs,
1298 register struct ui_file *stream)
1300 register struct block *block = get_frame_block (fi, 0);
1301 register int values_printed = 0;
1305 fprintf_filtered (stream, "No symbol table info available.\n");
1311 if (print_block_frame_locals (block, fi, num_tabs, stream))
1313 /* After handling the function's top-level block, stop.
1314 Don't continue to its superblock, the block of
1315 per-file symbols. */
1316 if (BLOCK_FUNCTION (block))
1318 block = BLOCK_SUPERBLOCK (block);
1321 if (!values_printed)
1323 fprintf_filtered (stream, "No locals.\n");
1327 /* Same, but print labels. */
1330 print_frame_label_vars (register struct frame_info *fi, int this_level_only,
1331 register struct ui_file *stream)
1333 register struct blockvector *bl;
1334 register struct block *block = get_frame_block (fi, 0);
1335 register int values_printed = 0;
1336 int index, have_default = 0;
1337 char *blocks_printed;
1338 CORE_ADDR pc = fi->pc;
1342 fprintf_filtered (stream, "No symbol table info available.\n");
1346 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
1347 blocks_printed = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
1348 memset (blocks_printed, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
1352 CORE_ADDR end = BLOCK_END (block) - 4;
1355 if (bl != blockvector_for_pc (end, &index))
1356 error ("blockvector blotch");
1357 if (BLOCKVECTOR_BLOCK (bl, index) != block)
1358 error ("blockvector botch");
1359 last_index = BLOCKVECTOR_NBLOCKS (bl);
1362 /* Don't print out blocks that have gone by. */
1363 while (index < last_index
1364 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
1367 while (index < last_index
1368 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
1370 if (blocks_printed[index] == 0)
1372 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl, index), &have_default, stream))
1374 blocks_printed[index] = 1;
1380 if (values_printed && this_level_only)
1383 /* After handling the function's top-level block, stop.
1384 Don't continue to its superblock, the block of
1385 per-file symbols. */
1386 if (BLOCK_FUNCTION (block))
1388 block = BLOCK_SUPERBLOCK (block);
1391 if (!values_printed && !this_level_only)
1393 fprintf_filtered (stream, "No catches.\n");
1399 locals_info (char *args, int from_tty)
1401 if (!selected_frame)
1402 error ("No frame selected.");
1403 print_frame_local_vars (selected_frame, 0, gdb_stdout);
1407 catch_info (char *ignore, int from_tty)
1409 struct symtab_and_line *sal;
1411 /* Check for target support for exception handling */
1412 sal = target_enable_exception_callback (EX_EVENT_CATCH, 1);
1415 /* Currently not handling this */
1416 /* Ideally, here we should interact with the C++ runtime
1417 system to find the list of active handlers, etc. */
1418 fprintf_filtered (gdb_stdout, "Info catch not supported with this target/compiler combination.\n");
1420 if (!selected_frame)
1421 error ("No frame selected.");
1426 /* Assume g++ compiled code -- old v 4.16 behaviour */
1427 if (!selected_frame)
1428 error ("No frame selected.");
1430 print_frame_label_vars (selected_frame, 0, gdb_stdout);
1435 print_frame_arg_vars (register struct frame_info *fi,
1436 register struct ui_file *stream)
1438 struct symbol *func = get_frame_function (fi);
1439 register struct block *b;
1441 register struct symbol *sym, *sym2;
1442 register int values_printed = 0;
1446 fprintf_filtered (stream, "No symbol table info available.\n");
1450 b = SYMBOL_BLOCK_VALUE (func);
1451 ALL_BLOCK_SYMBOLS (b, i, sym)
1453 switch (SYMBOL_CLASS (sym))
1459 case LOC_REGPARM_ADDR:
1460 case LOC_BASEREG_ARG:
1462 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1463 fputs_filtered (" = ", stream);
1465 /* We have to look up the symbol because arguments can have
1466 two entries (one a parameter, one a local) and the one we
1467 want is the local, which lookup_symbol will find for us.
1468 This includes gcc1 (not gcc2) on the sparc when passing a
1469 small structure and gcc2 when the argument type is float
1470 and it is passed as a double and converted to float by
1471 the prologue (in the latter case the type of the LOC_ARG
1472 symbol is double and the type of the LOC_LOCAL symbol is
1473 float). There are also LOC_ARG/LOC_REGISTER pairs which
1474 are not combined in symbol-reading. */
1476 sym2 = lookup_symbol (SYMBOL_NAME (sym),
1477 b, VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL);
1478 print_variable_value (sym2, fi, stream);
1479 fprintf_filtered (stream, "\n");
1483 /* Don't worry about things which aren't arguments. */
1487 if (!values_printed)
1489 fprintf_filtered (stream, "No arguments.\n");
1494 args_info (char *ignore, int from_tty)
1496 if (!selected_frame)
1497 error ("No frame selected.");
1498 print_frame_arg_vars (selected_frame, gdb_stdout);
1503 args_plus_locals_info (char *ignore, int from_tty)
1505 args_info (ignore, from_tty);
1506 locals_info (ignore, from_tty);
1510 /* Select frame FI (or NULL - to invalidate the current frame). */
1513 select_frame (struct frame_info *fi)
1515 register struct symtab *s;
1517 selected_frame = fi;
1518 /* NOTE: cagney/2002-05-04: FI can be NULL. This occures when the
1519 frame is being invalidated. */
1520 if (selected_frame_level_changed_hook)
1521 selected_frame_level_changed_hook (frame_relative_level (fi));
1523 /* FIXME: kseitz/2002-08-28: It would be nice to call
1524 selected_frame_level_changed_event right here, but due to limitations
1525 in the current interfaces, we would end up flooding UIs with events
1526 because select_frame is used extensively internally.
1528 Once we have frame-parameterized frame (and frame-related) commands,
1529 the event notification can be moved here, since this function will only
1530 be called when the users selected frame is being changed. */
1532 /* Ensure that symbols for this frame are read in. Also, determine the
1533 source language of this frame, and switch to it if desired. */
1536 s = find_pc_symtab (fi->pc);
1538 && s->language != current_language->la_language
1539 && s->language != language_unknown
1540 && language_mode == language_mode_auto)
1542 set_language (s->language);
1548 /* Select frame FI. Also print the stack frame and show the source if
1549 this is the tui version. */
1551 select_and_print_frame (struct frame_info *fi)
1556 print_stack_frame (fi, frame_relative_level (fi), 1);
1560 /* Return the symbol-block in which the selected frame is executing.
1561 Can return zero under various legitimate circumstances.
1563 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1564 code address within the block returned. We use this to decide
1565 which macros are in scope. */
1568 get_selected_block (CORE_ADDR *addr_in_block)
1570 if (!target_has_stack)
1573 if (!selected_frame)
1574 return get_current_block (addr_in_block);
1575 return get_frame_block (selected_frame, addr_in_block);
1578 /* Find a frame a certain number of levels away from FRAME.
1579 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1580 Positive means go to earlier frames (up); negative, the reverse.
1581 The int that contains the number of levels is counted toward
1582 zero as the frames for those levels are found.
1583 If the top or bottom frame is reached, that frame is returned,
1584 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1585 how much farther the original request asked to go. */
1588 find_relative_frame (register struct frame_info *frame,
1589 register int *level_offset_ptr)
1591 register struct frame_info *prev;
1592 register struct frame_info *frame1;
1594 /* Going up is simple: just do get_prev_frame enough times
1595 or until initial frame is reached. */
1596 while (*level_offset_ptr > 0)
1598 prev = get_prev_frame (frame);
1601 (*level_offset_ptr)--;
1604 /* Going down is just as simple. */
1605 if (*level_offset_ptr < 0)
1607 while (*level_offset_ptr < 0)
1609 frame1 = get_next_frame (frame);
1613 (*level_offset_ptr)++;
1619 /* The "select_frame" command. With no arg, NOP.
1620 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1621 valid level. Otherwise, treat level_exp as an address expression
1622 and select it. See parse_frame_specification for more info on proper
1623 frame expressions. */
1627 select_frame_command_wrapper (char *level_exp, int from_tty)
1629 select_frame_command (level_exp, from_tty);
1633 select_frame_command (char *level_exp, int from_tty)
1635 struct frame_info *frame;
1636 int level = frame_relative_level (selected_frame);
1638 if (!target_has_stack)
1639 error ("No stack.");
1641 frame = parse_frame_specification (level_exp);
1643 select_frame (frame);
1644 if (level != frame_relative_level (selected_frame))
1645 selected_frame_level_changed_event (frame_relative_level (selected_frame));
1648 /* The "frame" command. With no arg, print selected frame briefly.
1649 With arg, behaves like select_frame and then prints the selected
1653 frame_command (char *level_exp, int from_tty)
1655 select_frame_command (level_exp, from_tty);
1656 show_and_print_stack_frame (selected_frame,
1657 frame_relative_level (selected_frame), 1);
1660 /* The XDB Compatibility command to print the current frame. */
1663 current_frame_command (char *level_exp, int from_tty)
1665 if (target_has_stack == 0 || selected_frame == 0)
1666 error ("No stack.");
1667 print_only_stack_frame (selected_frame,
1668 frame_relative_level (selected_frame), 1);
1671 /* Select the frame up one or COUNT stack levels
1672 from the previously selected frame, and print it briefly. */
1676 up_silently_base (char *count_exp)
1678 register struct frame_info *fi;
1679 int count = 1, count1;
1681 count = parse_and_eval_long (count_exp);
1684 if (target_has_stack == 0 || selected_frame == 0)
1685 error ("No stack.");
1687 fi = find_relative_frame (selected_frame, &count1);
1688 if (count1 != 0 && count_exp == 0)
1689 error ("Initial frame selected; you cannot go up.");
1691 selected_frame_level_changed_event (frame_relative_level (selected_frame));
1695 up_silently_command (char *count_exp, int from_tty)
1697 up_silently_base (count_exp);
1701 up_command (char *count_exp, int from_tty)
1703 up_silently_base (count_exp);
1704 show_and_print_stack_frame (selected_frame,
1705 frame_relative_level (selected_frame), 1);
1708 /* Select the frame down one or COUNT stack levels
1709 from the previously selected frame, and print it briefly. */
1713 down_silently_base (char *count_exp)
1715 register struct frame_info *frame;
1716 int count = -1, count1;
1718 count = -parse_and_eval_long (count_exp);
1721 if (target_has_stack == 0 || selected_frame == 0)
1722 error ("No stack.");
1724 frame = find_relative_frame (selected_frame, &count1);
1725 if (count1 != 0 && count_exp == 0)
1728 /* We only do this if count_exp is not specified. That way "down"
1729 means to really go down (and let me know if that is
1730 impossible), but "down 9999" can be used to mean go all the way
1731 down without getting an error. */
1733 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1736 select_frame (frame);
1737 selected_frame_level_changed_event (frame_relative_level (selected_frame));
1742 down_silently_command (char *count_exp, int from_tty)
1744 down_silently_base (count_exp);
1748 down_command (char *count_exp, int from_tty)
1750 down_silently_base (count_exp);
1751 show_and_print_stack_frame (selected_frame,
1752 frame_relative_level (selected_frame), 1);
1756 return_command_wrapper (char *retval_exp, int from_tty)
1758 return_command (retval_exp, from_tty);
1762 return_command (char *retval_exp, int from_tty)
1764 struct symbol *thisfun;
1765 CORE_ADDR selected_frame_addr;
1766 CORE_ADDR selected_frame_pc;
1767 struct frame_info *frame;
1768 struct value *return_value = NULL;
1770 if (selected_frame == NULL)
1771 error ("No selected frame.");
1772 thisfun = get_frame_function (selected_frame);
1773 selected_frame_addr = FRAME_FP (selected_frame);
1774 selected_frame_pc = selected_frame->pc;
1776 /* Compute the return value (if any -- possibly getting errors here). */
1780 struct type *return_type = NULL;
1782 return_value = parse_and_eval (retval_exp);
1784 /* Cast return value to the return type of the function. */
1785 if (thisfun != NULL)
1786 return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun));
1787 if (return_type == NULL)
1788 return_type = builtin_type_int;
1789 return_value = value_cast (return_type, return_value);
1791 /* Make sure we have fully evaluated it, since
1792 it might live in the stack frame we're about to pop. */
1793 if (VALUE_LAZY (return_value))
1794 value_fetch_lazy (return_value);
1797 /* If interactive, require confirmation. */
1803 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun)))
1805 error ("Not confirmed.");
1809 else if (!query ("Make selected stack frame return now? "))
1810 error ("Not confirmed.");
1813 /* Do the real work. Pop until the specified frame is current. We
1814 use this method because the selected_frame is not valid after
1815 a POP_FRAME. The pc comparison makes this work even if the
1816 selected frame shares its fp with another frame. */
1818 while (selected_frame_addr != (frame = get_current_frame ())->frame
1819 || selected_frame_pc != frame->pc)
1822 /* Then pop that frame. */
1826 /* Compute the return value (if any) and store in the place
1827 for return values. */
1830 set_return_value (return_value);
1832 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1834 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1835 FRAME_FP (get_current_frame ())))
1838 /* If interactive, print the frame that is now current. */
1841 frame_command ("0", 1);
1843 select_frame_command ("0", 0);
1846 /* Sets the scope to input function name, provided that the
1847 function is within the current stack frame */
1849 struct function_bounds
1851 CORE_ADDR low, high;
1854 static void func_command (char *arg, int from_tty);
1856 func_command (char *arg, int from_tty)
1858 struct frame_info *fp;
1860 struct symtabs_and_lines sals;
1863 struct function_bounds *func_bounds = (struct function_bounds *) NULL;
1865 if (arg != (char *) NULL)
1868 fp = parse_frame_specification ("0");
1869 sals = decode_line_spec (arg, 1);
1870 func_bounds = (struct function_bounds *) xmalloc (
1871 sizeof (struct function_bounds) * sals.nelts);
1872 for (i = 0; (i < sals.nelts && !found); i++)
1874 if (sals.sals[i].pc == (CORE_ADDR) 0 ||
1875 find_pc_partial_function (sals.sals[i].pc,
1877 &func_bounds[i].low,
1878 &func_bounds[i].high) == 0)
1880 func_bounds[i].low =
1881 func_bounds[i].high = (CORE_ADDR) NULL;
1887 for (i = 0; (i < sals.nelts && !found); i++)
1888 found = (fp->pc >= func_bounds[i].low &&
1889 fp->pc < func_bounds[i].high);
1893 fp = find_relative_frame (fp, &level);
1896 while (!found && level == 0);
1899 xfree (func_bounds);
1902 printf_filtered ("'%s' not within current stack frame.\n", arg);
1903 else if (fp != selected_frame)
1904 select_and_print_frame (fp);
1907 /* Gets the language of the current frame. */
1910 get_frame_language (void)
1912 register struct symtab *s;
1913 enum language flang; /* The language of the current frame */
1917 s = find_pc_symtab (selected_frame->pc);
1919 flang = s->language;
1921 flang = language_unknown;
1924 flang = language_unknown;
1930 _initialize_stack (void)
1933 backtrace_limit = 30;
1936 add_com ("return", class_stack, return_command,
1937 "Make selected stack frame return to its caller.\n\
1938 Control remains in the debugger, but when you continue\n\
1939 execution will resume in the frame above the one now selected.\n\
1940 If an argument is given, it is an expression for the value to return.");
1942 add_com ("up", class_stack, up_command,
1943 "Select and print stack frame that called this one.\n\
1944 An argument says how many frames up to go.");
1945 add_com ("up-silently", class_support, up_silently_command,
1946 "Same as the `up' command, but does not print anything.\n\
1947 This is useful in command scripts.");
1949 add_com ("down", class_stack, down_command,
1950 "Select and print stack frame called by this one.\n\
1951 An argument says how many frames down to go.");
1952 add_com_alias ("do", "down", class_stack, 1);
1953 add_com_alias ("dow", "down", class_stack, 1);
1954 add_com ("down-silently", class_support, down_silently_command,
1955 "Same as the `down' command, but does not print anything.\n\
1956 This is useful in command scripts.");
1958 add_com ("frame", class_stack, frame_command,
1959 "Select and print a stack frame.\n\
1960 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1961 An argument specifies the frame to select.\n\
1962 It can be a stack frame number or the address of the frame.\n\
1963 With argument, nothing is printed if input is coming from\n\
1964 a command file or a user-defined command.");
1966 add_com_alias ("f", "frame", class_stack, 1);
1970 add_com ("L", class_stack, current_frame_command,
1971 "Print the current stack frame.\n");
1972 add_com_alias ("V", "frame", class_stack, 1);
1974 add_com ("select-frame", class_stack, select_frame_command,
1975 "Select a stack frame without printing anything.\n\
1976 An argument specifies the frame to select.\n\
1977 It can be a stack frame number or the address of the frame.\n");
1979 add_com ("backtrace", class_stack, backtrace_command,
1980 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1981 With a negative argument, print outermost -COUNT frames.\n\
1982 Use of the 'full' qualifier also prints the values of the local variables.\n");
1983 add_com_alias ("bt", "backtrace", class_stack, 0);
1986 add_com_alias ("t", "backtrace", class_stack, 0);
1987 add_com ("T", class_stack, backtrace_full_command,
1988 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1989 and the values of the local variables.\n\
1990 With a negative argument, print outermost -COUNT frames.\n\
1991 Usage: T <count>\n");
1994 add_com_alias ("where", "backtrace", class_alias, 0);
1995 add_info ("stack", backtrace_command,
1996 "Backtrace of the stack, or innermost COUNT frames.");
1997 add_info_alias ("s", "stack", 1);
1998 add_info ("frame", frame_info,
1999 "All about selected stack frame, or frame at ADDR.");
2000 add_info_alias ("f", "frame", 1);
2001 add_info ("locals", locals_info,
2002 "Local variables of current stack frame.");
2003 add_info ("args", args_info,
2004 "Argument variables of current stack frame.");
2006 add_com ("l", class_info, args_plus_locals_info,
2007 "Argument and local variables of current stack frame.");
2010 add_com ("func", class_stack, func_command,
2011 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2013 add_info ("catch", catch_info,
2014 "Exceptions that can be caught in the current stack frame.");
2017 add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command,
2018 "Specify maximum number of frames for \"backtrace\" to print by default.",
2020 add_info ("backtrace-limit", backtrace_limit_info,
2021 "The maximum number of frames for \"backtrace\" to print by default.");