1 /* Print and select stack frames for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
28 #include "expression.h"
34 #include "breakpoint.h"
42 /* Prototypes for exported functions. */
44 void args_info (char *, int);
46 void locals_info (char *, int);
48 void (*selected_frame_level_changed_hook) (int);
50 void _initialize_stack (void);
52 /* Prototypes for local functions. */
54 static void return_command (char *, int);
56 static void down_command (char *, int);
58 static void down_silently_base (char *);
60 static void down_silently_command (char *, int);
62 static void up_command (char *, int);
64 static void up_silently_base (char *);
66 static void up_silently_command (char *, int);
68 void frame_command (char *, int);
70 static void current_frame_command (char *, int);
72 static void select_frame_command (char *, int);
74 static void print_frame_arg_vars (struct frame_info *, struct ui_file *);
76 static void catch_info (char *, int);
78 static void args_plus_locals_info (char *, int);
80 static void print_frame_label_vars (struct frame_info *, int,
83 static void print_frame_local_vars (struct frame_info *, int,
86 static int print_block_frame_labels (struct block *, int *,
89 static int print_block_frame_locals (struct block *,
94 static void print_frame (struct frame_info *fi,
98 struct symtab_and_line sal);
100 static void print_frame_info_base (struct frame_info *, int, int, int);
102 static void print_stack_frame_base (struct frame_info *, int, int);
104 static void backtrace_command (char *, int);
106 struct frame_info *parse_frame_specification (char *);
108 static void frame_info (char *, int);
110 extern int addressprint; /* Print addresses, or stay symbolic only? */
111 extern int info_verbose; /* Verbosity of symbol reading msgs */
112 extern int lines_to_list; /* # of lines "list" command shows by default */
114 /* The "selected" stack frame is used by default for local and arg access.
115 May be zero, for no selected frame. */
117 struct frame_info *selected_frame;
119 /* Level of the selected frame:
120 0 for innermost, 1 for its caller, ...
121 or -1 for frame specified by address with no defined level. */
123 int selected_frame_level;
125 /* Zero means do things normally; we are interacting directly with the
126 user. One means print the full filename and linenumber when a
127 frame is printed, and do so in a format emacs18/emacs19.22 can
128 parse. Two means print similar annotations, but in many more
129 cases and in a slightly different syntax. */
131 int annotation_level = 0;
134 struct print_stack_frame_args
136 struct frame_info *fi;
142 static int print_stack_frame_base_stub (char *);
144 /* Show and print the frame arguments.
145 Pass the args the way catch_errors wants them. */
146 static int show_and_print_stack_frame_stub (void *args);
148 show_and_print_stack_frame_stub (void *args)
150 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
152 /* Reversed order of these so tuiDo() doesn't occur
153 * in the middle of "Breakpoint 1 ... [location]" printing = RT
156 print_frame_info_base (p->fi, p->level, p->source, p->args);
157 print_frame_info (p->fi, p->level, p->source, p->args);
162 /* Show or print the frame arguments.
163 Pass the args the way catch_errors wants them. */
164 static int print_stack_frame_stub (void *args);
166 print_stack_frame_stub (void *args)
168 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
171 print_frame_info (p->fi, p->level, p->source, p->args);
173 print_frame_info_base (p->fi, p->level, p->source, p->args);
177 /* Print a stack frame briefly. FRAME_INFI should be the frame info
178 and LEVEL should be its level in the stack (or -1 for level not
181 /* Pass the args the way catch_errors wants them. */
183 print_stack_frame_base_stub (char *args)
185 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
187 print_frame_info_base (p->fi, p->level, p->source, p->args);
191 /* print the frame arguments to the terminal.
192 Pass the args the way catch_errors wants them. */
193 static int print_only_stack_frame_stub (void *);
195 print_only_stack_frame_stub (void *args)
197 struct print_stack_frame_args *p = (struct print_stack_frame_args *) args;
199 print_frame_info_base (p->fi, p->level, p->source, p->args);
203 /* Print a stack frame briefly. FRAME_INFI should be the frame info
204 and LEVEL should be its level in the stack (or -1 for level not defined).
205 This prints the level, the function executing, the arguments,
206 and the file name and line number.
207 If the pc is not at the beginning of the source line,
208 the actual pc is printed at the beginning.
210 If SOURCE is 1, print the source line as well.
211 If SOURCE is -1, print ONLY the source line. */
214 print_stack_frame_base (struct frame_info *fi, int level, int source)
216 struct print_stack_frame_args args;
220 args.source = source;
223 catch_errors (print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
226 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
227 and LEVEL should be its level in the stack (or -1 for level not defined).
228 This prints the level, the function executing, the arguments,
229 and the file name and line number.
230 If the pc is not at the beginning of the source line,
231 the actual pc is printed at the beginning.
233 If SOURCE is 1, print the source line as well.
234 If SOURCE is -1, print ONLY the source line. */
237 show_and_print_stack_frame (struct frame_info *fi, int level, int source)
239 struct print_stack_frame_args args;
243 args.source = source;
246 catch_errors (show_and_print_stack_frame_stub, &args, "", RETURN_MASK_ALL);
250 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
251 and LEVEL should be its level in the stack (or -1 for level not defined).
252 This prints the level, the function executing, the arguments,
253 and the file name and line number.
254 If the pc is not at the beginning of the source line,
255 the actual pc is printed at the beginning.
257 If SOURCE is 1, print the source line as well.
258 If SOURCE is -1, print ONLY the source line. */
261 print_stack_frame (struct frame_info *fi, int level, int source)
263 struct print_stack_frame_args args;
267 args.source = source;
270 catch_errors (print_stack_frame_stub, (char *) &args, "", RETURN_MASK_ALL);
273 /* Print a stack frame briefly. FRAME_INFI should be the frame info
274 and LEVEL should be its level in the stack (or -1 for level not defined).
275 This prints the level, the function executing, the arguments,
276 and the file name and line number.
277 If the pc is not at the beginning of the source line,
278 the actual pc is printed at the beginning.
280 If SOURCE is 1, print the source line as well.
281 If SOURCE is -1, print ONLY the source line. */
284 print_only_stack_frame (struct frame_info *fi, int level, int source)
286 struct print_stack_frame_args args;
290 args.source = source;
293 catch_errors (print_only_stack_frame_stub, &args, "", RETURN_MASK_ALL);
296 struct print_args_args
299 struct frame_info *fi;
300 struct ui_file *stream;
303 static int print_args_stub (PTR);
305 /* Pass the args the way catch_errors wants them. */
308 print_args_stub (PTR args)
311 struct print_args_args *p = (struct print_args_args *) args;
313 numargs = FRAME_NUM_ARGS (p->fi);
314 print_frame_args (p->func, p->fi, numargs, p->stream);
318 /* Print information about a frame for frame "fi" at level "level".
319 Used in "where" output, also used to emit breakpoint or step
321 LEVEL is the level of the frame, or -1 if it is the
322 innermost frame but we don't want to print the level.
323 The meaning of the SOURCE argument is:
324 SRC_LINE: Print only source line
325 LOCATION: Print only location
326 LOC_AND_SRC: Print location and source line. */
329 print_frame_info_base (struct frame_info *fi, int level, int source, int args)
331 struct symtab_and_line sal;
336 char buf[MAX_REGISTER_RAW_SIZE];
339 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
341 /* Get the value of SP_REGNUM relative to the frame. */
342 get_saved_register (buf, (int *) NULL, (CORE_ADDR *) NULL,
343 FRAME_INFO_ID (fi), SP_REGNUM, (enum lval_type *) NULL);
344 sp = extract_address (buf, REGISTER_RAW_SIZE (SP_REGNUM));
346 /* This is not a perfect test, because if a function alloca's some
347 memory, puts some code there, and then jumps into it, then the test
348 will succeed even though there is no call dummy. Probably best is
349 to check for a bp_call_dummy breakpoint. */
350 if (PC_IN_CALL_DUMMY (fi->pc, sp, fi->frame))
352 if (frame_in_dummy (fi))
355 annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
357 /* Do this regardless of SOURCE because we don't have any source
358 to list for this frame. */
360 printf_filtered ("#%-2d ", level);
361 annotate_function_call ();
362 printf_filtered ("<function called from gdb>\n");
363 annotate_frame_end ();
366 if (fi->signal_handler_caller)
368 annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
370 /* Do this regardless of SOURCE because we don't have any source
371 to list for this frame. */
373 printf_filtered ("#%-2d ", level);
374 annotate_signal_handler_caller ();
375 printf_filtered ("<signal handler called>\n");
376 annotate_frame_end ();
380 /* If fi is not the innermost frame, that normally means that fi->pc
381 points to *after* the call instruction, and we want to get the line
382 containing the call, never the next line. But if the next frame is
383 a signal_handler_caller or a dummy frame, then the next frame was
384 not entered as the result of a call, and we want to get the line
385 containing fi->pc. */
387 find_pc_line (fi->pc,
389 && !fi->next->signal_handler_caller
390 && !frame_in_dummy (fi->next));
392 location_print = (source == LOCATION
393 || source == LOC_AND_ADDRESS
394 || source == SRC_AND_LOC);
396 if (location_print || !sal.symtab)
397 print_frame (fi, level, source, args, sal);
399 source_print = (source == SRC_LINE || source == SRC_AND_LOC);
401 if (source_print && sal.symtab)
404 int mid_statement = (source == SRC_LINE) && (fi->pc != sal.pc);
406 if (annotation_level)
407 done = identify_source_line (sal.symtab, sal.line, mid_statement,
411 if (addressprint && mid_statement && !tui_version)
414 ui_out_field_core_addr (uiout, "addr", fi->pc);
415 ui_out_text (uiout, "\t");
417 print_address_numeric (fi->pc, 1, gdb_stdout);
418 printf_filtered ("\t");
421 if (print_frame_info_listing_hook)
422 print_frame_info_listing_hook (sal.symtab, sal.line, sal.line + 1, 0);
423 else if (!tui_version)
424 print_source_lines (sal.symtab, sal.line, sal.line + 1, 0);
426 current_source_line = max (sal.line - lines_to_list / 2, 1);
430 set_default_breakpoint (1, fi->pc, sal.symtab, sal.line);
432 annotate_frame_end ();
434 gdb_flush (gdb_stdout);
438 print_frame (struct frame_info *fi,
442 struct symtab_and_line sal)
445 register char *funname = 0;
446 enum language funlang = language_unknown;
448 struct ui_stream *stb;
449 struct cleanup *old_chain;
450 struct cleanup *list_chain;
452 stb = ui_out_stream_new (uiout);
453 old_chain = make_cleanup_ui_out_stream_delete (stb);
456 func = find_pc_function (fi->pc);
459 /* In certain pathological cases, the symtabs give the wrong
460 function (when we are in the first function in a file which
461 is compiled without debugging symbols, the previous function
462 is compiled with debugging symbols, and the "foo.o" symbol
463 that is supposed to tell us where the file with debugging symbols
464 ends has been truncated by ar because it is longer than 15
465 characters). This also occurs if the user uses asm() to create
466 a function but not stabs for it (in a file compiled -g).
468 So look in the minimal symbol tables as well, and if it comes
469 up with a larger address for the function use that instead.
470 I don't think this can ever cause any problems; there shouldn't
471 be any minimal symbols in the middle of a function; if this is
472 ever changed many parts of GDB will need to be changed (and we'll
473 create a find_pc_minimal_function or some such). */
475 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
477 && (SYMBOL_VALUE_ADDRESS (msymbol)
478 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
481 /* There is no particular reason to think the line number
482 information is wrong. Someone might have just put in
483 a label with asm() but left the line numbers alone. */
484 /* In this case we have no way of knowing the source file
485 and line number, so don't print them. */
488 /* We also don't know anything about the function besides
489 its address and name. */
491 funname = SYMBOL_NAME (msymbol);
492 funlang = SYMBOL_LANGUAGE (msymbol);
496 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
497 demangled name that we already have stored in the symbol
498 table, but we stored a version with DMGL_PARAMS turned
499 on, and here we don't want to display parameters. So call
500 the demangler again, with DMGL_ANSI only. (Yes, I know
501 that printf_symbol_filtered() will again try to demangle
502 the name on the fly, but the issue is that if
503 cplus_demangle() fails here, it'll fail there too. So we
504 want to catch the failure ("demangled==NULL" case below)
505 here, while we still have our hands on the function
508 funname = SYMBOL_NAME (func);
509 funlang = SYMBOL_LANGUAGE (func);
510 if (funlang == language_cplus)
512 demangled = cplus_demangle (funname, DMGL_ANSI);
513 if (demangled == NULL)
514 /* If the demangler fails, try the demangled name from
515 the symbol table. This'll have parameters, but
516 that's preferable to diplaying a mangled name. */
517 funname = SYMBOL_SOURCE_NAME (func);
523 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
526 funname = SYMBOL_NAME (msymbol);
527 funlang = SYMBOL_LANGUAGE (msymbol);
531 annotate_frame_begin (level == -1 ? 0 : level, fi->pc);
534 ui_out_list_begin (uiout, "frame");
535 list_chain = make_cleanup_ui_out_list_end (uiout);
541 ui_out_text (uiout, "#");
542 ui_out_field_fmt (uiout, "level", "%-2d", level);
543 ui_out_spaces (uiout, 1);
545 printf_filtered ("#%-2d ", level);
549 if (fi->pc != sal.pc || !sal.symtab || source == LOC_AND_ADDRESS)
551 annotate_frame_address ();
553 ui_out_field_core_addr (uiout, "addr", fi->pc);
554 annotate_frame_address_end ();
555 ui_out_text (uiout, " in ");
557 print_address_numeric (fi->pc, 1, gdb_stdout);
558 annotate_frame_address_end ();
559 printf_filtered (" in ");
562 annotate_frame_function_name ();
564 fprintf_symbol_filtered (stb->stream, funname ? funname : "??", funlang,
566 ui_out_field_stream (uiout, "func", stb);
567 ui_out_wrap_hint (uiout, " ");
569 fprintf_symbol_filtered (gdb_stdout, funname ? funname : "??", funlang,
573 annotate_frame_args ();
576 ui_out_text (uiout, " (");
578 fputs_filtered (" (", gdb_stdout);
582 struct print_args_args args;
584 struct cleanup *args_list_chain;
588 args.stream = gdb_stdout;
590 ui_out_list_begin (uiout, "args");
591 args_list_chain = make_cleanup_ui_out_list_end (uiout);
592 catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL);
593 /* FIXME: args must be a list. If one argument is a string it will
594 have " that will not be properly escaped. */
595 /* Invoke ui_out_list_end. */
596 do_cleanups (args_list_chain);
598 catch_errors (print_args_stub, &args, "", RETURN_MASK_ALL);
603 ui_out_text (uiout, ")");
605 printf_filtered (")");
607 if (sal.symtab && sal.symtab->filename)
609 annotate_frame_source_begin ();
611 ui_out_wrap_hint (uiout, " ");
612 ui_out_text (uiout, " at ");
613 annotate_frame_source_file ();
614 ui_out_field_string (uiout, "file", sal.symtab->filename);
615 annotate_frame_source_file_end ();
616 ui_out_text (uiout, ":");
617 annotate_frame_source_line ();
618 ui_out_field_int (uiout, "line", sal.line);
621 printf_filtered (" at ");
622 annotate_frame_source_file ();
623 printf_filtered ("%s", sal.symtab->filename);
624 annotate_frame_source_file_end ();
625 printf_filtered (":");
626 annotate_frame_source_line ();
627 printf_filtered ("%d", sal.line);
629 annotate_frame_source_end ();
633 if (!funname || (!sal.symtab || !sal.symtab->filename))
635 char *lib = PC_SOLIB (fi->pc);
638 annotate_frame_where ();
640 ui_out_wrap_hint (uiout, " ");
641 ui_out_text (uiout, " from ");
642 ui_out_field_string (uiout, "from", lib);
645 printf_filtered (" from %s", lib);
649 #endif /* PC_SOLIB */
652 /* do_cleanups will call ui_out_list_end() for us. */
653 do_cleanups (list_chain);
654 ui_out_text (uiout, "\n");
655 do_cleanups (old_chain);
657 printf_filtered ("\n");
664 stack_publish_stopped_with_no_frame (void)
666 TUIDO (((TuiOpaqueFuncPtr) tuiUpdateOnEnd));
672 /* Show or print the frame info. If this is the tui, it will be shown in
673 the source display */
675 print_frame_info (struct frame_info *fi, register int level, int source,
679 print_frame_info_base (fi, level, source, args);
682 if (fi && (frame_in_dummy (fi) || fi->signal_handler_caller))
683 print_frame_info_base (fi, level, source, args);
686 TUIDO (((TuiOpaqueFuncPtr) tui_vShowFrameInfo, fi));
691 /* Show the frame info. If this is the tui, it will be shown in
692 the source display otherwise, nothing is done */
694 show_stack_frame (struct frame_info *fi)
696 TUIDO (((TuiOpaqueFuncPtr) tui_vShowFrameInfo, fi));
700 /* Read a frame specification in whatever the appropriate format is.
701 Call error() if the specification is in any way invalid (i.e.
702 this function never returns NULL). */
705 parse_frame_specification (char *frame_exp)
709 CORE_ADDR args[MAXARGS];
714 char *addr_string, *p;
715 struct cleanup *tmp_cleanup;
717 while (*frame_exp == ' ')
722 if (numargs > MAXARGS)
723 error ("Too many args in frame specification");
724 /* Parse an argument. */
725 for (p = frame_exp; *p && *p != ' '; p++)
727 addr_string = savestring (frame_exp, p - frame_exp);
732 tmp_cleanup = make_cleanup (xfree, addr_string);
734 /* NOTE: we call parse_and_eval and then both
735 value_as_long and value_as_pointer rather than calling
736 parse_and_eval_long and parse_and_eval_address because
737 of the issue of potential side effects from evaluating
739 vp = parse_and_eval (addr_string);
741 level = value_as_long (vp);
743 args[numargs++] = value_as_pointer (vp);
744 do_cleanups (tmp_cleanup);
747 /* Skip spaces, move to possible next arg. */
757 if (selected_frame == NULL)
758 error ("No selected frame.");
759 return selected_frame;
763 struct frame_info *fid =
764 find_relative_frame (get_current_frame (), &level);
765 struct frame_info *tfid;
768 /* find_relative_frame was successful */
771 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
772 take at least 2 addresses. It is important to detect this case
773 here so that "frame 100" does not give a confusing error message
774 like "frame specification requires two addresses". This of course
775 does not solve the "frame 100" problem for machines on which
776 a frame specification can be made with one address. To solve
777 that, we need a new syntax for a specifying a frame by address.
778 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
779 two args, etc.), but people might think that is too much typing,
780 so I guess *0x23,0x45 would be a possible alternative (commas
781 really should be used instead of spaces to delimit; using spaces
782 normally works in an expression). */
783 #ifdef SETUP_ARBITRARY_FRAME
784 error ("No frame %d", args[0]);
787 /* If (s)he specifies the frame with an address, he deserves what
788 (s)he gets. Still, give the highest one that matches. */
790 for (fid = get_current_frame ();
791 fid && fid->frame != args[0];
792 fid = get_prev_frame (fid))
796 while ((tfid = get_prev_frame (fid)) &&
797 (tfid->frame == args[0]))
800 /* We couldn't identify the frame as an existing frame, but
801 perhaps we can create one with a single argument. */
805 #ifdef SETUP_ARBITRARY_FRAME
806 return SETUP_ARBITRARY_FRAME (numargs, args);
808 /* Usual case. Do it here rather than have everyone supply
809 a SETUP_ARBITRARY_FRAME that does this. */
811 return create_new_frame (args[0], 0);
812 error ("Too many args in frame specification");
819 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
820 that if it is unsure about the answer, it returns 0
821 instead of guessing (this happens on the VAX and i960, for example).
823 On most machines, we never have to guess about the args address,
824 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
825 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
826 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
829 /* Print verbosely the selected frame or the frame at address ADDR.
830 This means absolutely all information in the frame is printed. */
833 frame_info (char *addr_exp, int from_tty)
835 struct frame_info *fi;
836 struct symtab_and_line sal;
839 struct frame_info *calling_frame_info;
840 int i, count, numregs;
842 enum language funlang = language_unknown;
844 if (!target_has_stack)
847 fi = parse_frame_specification (addr_exp);
849 error ("Invalid frame specified.");
851 sal = find_pc_line (fi->pc,
853 && !fi->next->signal_handler_caller
854 && !frame_in_dummy (fi->next));
855 func = get_frame_function (fi);
856 s = find_pc_symtab (fi->pc);
859 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
860 * the demangled name that we already have stored in
861 * the symbol table, but we stored a version with
862 * DMGL_PARAMS turned on, and here we don't want
863 * to display parameters. So call the demangler again,
864 * with DMGL_ANSI only. RT
865 * (Yes, I know that printf_symbol_filtered() will
866 * again try to demangle the name on the fly, but
867 * the issue is that if cplus_demangle() fails here,
868 * it'll fail there too. So we want to catch the failure
869 * ("demangled==NULL" case below) here, while we still
870 * have our hands on the function symbol.)
873 funname = SYMBOL_NAME (func);
874 funlang = SYMBOL_LANGUAGE (func);
875 if (funlang == language_cplus)
877 demangled = cplus_demangle (funname, DMGL_ANSI);
878 /* If the demangler fails, try the demangled name
879 * from the symbol table. This'll have parameters,
880 * but that's preferable to diplaying a mangled name.
882 if (demangled == NULL)
883 funname = SYMBOL_SOURCE_NAME (func);
888 register struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
891 funname = SYMBOL_NAME (msymbol);
892 funlang = SYMBOL_LANGUAGE (msymbol);
895 calling_frame_info = get_prev_frame (fi);
897 if (!addr_exp && selected_frame_level >= 0)
899 printf_filtered ("Stack level %d, frame at ", selected_frame_level);
900 print_address_numeric (fi->frame, 1, gdb_stdout);
901 printf_filtered (":\n");
905 printf_filtered ("Stack frame at ");
906 print_address_numeric (fi->frame, 1, gdb_stdout);
907 printf_filtered (":\n");
909 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM));
910 print_address_numeric (fi->pc, 1, gdb_stdout);
915 printf_filtered (" in ");
916 fprintf_symbol_filtered (gdb_stdout, funname, funlang,
917 DMGL_ANSI | DMGL_PARAMS);
921 printf_filtered (" (%s:%d)", sal.symtab->filename, sal.line);
922 puts_filtered ("; ");
924 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM));
925 print_address_numeric (FRAME_SAVED_PC (fi), 1, gdb_stdout);
926 printf_filtered ("\n");
930 frameless = FRAMELESS_FUNCTION_INVOCATION (fi);
932 printf_filtered (" (FRAMELESS),");
935 if (calling_frame_info)
937 printf_filtered (" called by frame at ");
938 print_address_numeric (calling_frame_info->frame, 1, gdb_stdout);
940 if (fi->next && calling_frame_info)
945 printf_filtered (" caller of frame at ");
946 print_address_numeric (fi->next->frame, 1, gdb_stdout);
948 if (fi->next || calling_frame_info)
949 puts_filtered ("\n");
951 printf_filtered (" source language %s.\n", language_str (s->language));
953 #ifdef PRINT_EXTRA_FRAME_INFO
954 PRINT_EXTRA_FRAME_INFO (fi);
958 /* Address of the argument list for this frame, or 0. */
959 CORE_ADDR arg_list = FRAME_ARGS_ADDRESS_CORRECT (fi);
960 /* Number of args for this frame, or -1 if unknown. */
964 printf_filtered (" Arglist at unknown address.\n");
967 printf_filtered (" Arglist at ");
968 print_address_numeric (arg_list, 1, gdb_stdout);
969 printf_filtered (",");
971 numargs = FRAME_NUM_ARGS (fi);
973 puts_filtered (" args: ");
974 else if (numargs == 0)
975 puts_filtered (" no args.");
976 else if (numargs == 1)
977 puts_filtered (" 1 arg: ");
979 printf_filtered (" %d args: ", numargs);
980 print_frame_args (func, fi, numargs, gdb_stdout);
981 puts_filtered ("\n");
985 /* Address of the local variables for this frame, or 0. */
986 CORE_ADDR arg_list = FRAME_LOCALS_ADDRESS (fi);
989 printf_filtered (" Locals at unknown address,");
992 printf_filtered (" Locals at ");
993 print_address_numeric (arg_list, 1, gdb_stdout);
994 printf_filtered (",");
998 FRAME_INIT_SAVED_REGS (fi);
999 if (fi->saved_regs != NULL)
1001 /* The sp is special; what's returned isn't the save address, but
1002 actually the value of the previous frame's sp. */
1003 printf_filtered (" Previous frame's sp is ");
1004 print_address_numeric (fi->saved_regs[SP_REGNUM], 1, gdb_stdout);
1005 printf_filtered ("\n");
1007 numregs = NUM_REGS + NUM_PSEUDO_REGS;
1008 for (i = 0; i < numregs; i++)
1009 if (fi->saved_regs[i] && i != SP_REGNUM)
1012 puts_filtered (" Saved registers:\n ");
1014 puts_filtered (",");
1016 printf_filtered (" %s at ", REGISTER_NAME (i));
1017 print_address_numeric (fi->saved_regs[i], 1, gdb_stdout);
1021 puts_filtered ("\n");
1025 /* We could get some information about saved registers by
1026 calling get_saved_register on each register. Which info goes
1027 with which frame is necessarily lost, however, and I suspect
1028 that the users don't care whether they get the info. */
1029 puts_filtered ("\n");
1034 /* Set a limit on the number of frames printed by default in a
1037 static int backtrace_limit;
1040 set_backtrace_limit_command (char *count_exp, int from_tty)
1042 int count = parse_and_eval_long (count_exp);
1045 error ("Negative argument not meaningful as backtrace limit.");
1047 backtrace_limit = count;
1051 backtrace_limit_info (char *arg, int from_tty)
1054 error ("\"Info backtrace-limit\" takes no arguments.");
1056 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit);
1060 /* Print briefly all stack frames or just the innermost COUNT frames. */
1062 static void backtrace_command_1 (char *count_exp, int show_locals,
1065 backtrace_command_1 (char *count_exp, int show_locals, int from_tty)
1067 struct frame_info *fi;
1070 register struct frame_info *trailing;
1071 register int trailing_level;
1073 if (!target_has_stack)
1074 error ("No stack.");
1076 /* The following code must do two things. First, it must
1077 set the variable TRAILING to the frame from which we should start
1078 printing. Second, it must set the variable count to the number
1079 of frames which we should print, or -1 if all of them. */
1080 trailing = get_current_frame ();
1082 /* The target can be in a state where there is no valid frames
1083 (e.g., just connected). */
1084 if (trailing == NULL)
1085 error ("No stack.");
1090 count = parse_and_eval_long (count_exp);
1093 struct frame_info *current;
1098 while (current && count--)
1101 current = get_prev_frame (current);
1104 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1105 will be COUNT below it. */
1109 trailing = get_prev_frame (trailing);
1110 current = get_prev_frame (current);
1122 struct partial_symtab *ps;
1124 /* Read in symbols for all of the frames. Need to do this in
1125 a separate pass so that "Reading in symbols for xxx" messages
1126 don't screw up the appearance of the backtrace. Also
1127 if people have strong opinions against reading symbols for
1128 backtrace this may have to be an option. */
1132 fi = get_prev_frame (fi))
1135 ps = find_pc_psymtab (fi->pc);
1137 PSYMTAB_TO_SYMTAB (ps); /* Force syms to come in */
1141 for (i = 0, fi = trailing;
1143 i++, fi = get_prev_frame (fi))
1147 /* Don't use print_stack_frame; if an error() occurs it probably
1148 means further attempts to backtrace would fail (on the other
1149 hand, perhaps the code does or could be fixed to make sure
1150 the frame->prev field gets set to NULL in that case). */
1151 print_frame_info_base (fi, trailing_level + i, 0, 1);
1153 print_frame_local_vars (fi, 1, gdb_stdout);
1156 /* If we've stopped before the end, mention that. */
1158 printf_filtered ("(More stack frames follow...)\n");
1162 backtrace_command (char *arg, int from_tty)
1164 struct cleanup *old_chain = (struct cleanup *) NULL;
1165 char **argv = (char **) NULL;
1166 int argIndicatingFullTrace = (-1), totArgLen = 0, argc = 0;
1169 if (arg != (char *) NULL)
1173 argv = buildargv (arg);
1174 old_chain = make_cleanup_freeargv (argv);
1176 for (i = 0; (argv[i] != (char *) NULL); i++)
1180 for (j = 0; (j < strlen (argv[i])); j++)
1181 argv[i][j] = tolower (argv[i][j]);
1183 if (argIndicatingFullTrace < 0 && subset_compare (argv[i], "full"))
1184 argIndicatingFullTrace = argc;
1188 totArgLen += strlen (argv[i]);
1192 if (argIndicatingFullTrace >= 0)
1196 argPtr = (char *) xmalloc (totArgLen + 1);
1201 memset (argPtr, 0, totArgLen + 1);
1202 for (i = 0; (i < (argc + 1)); i++)
1204 if (i != argIndicatingFullTrace)
1206 strcat (argPtr, argv[i]);
1207 strcat (argPtr, " ");
1213 argPtr = (char *) NULL;
1217 backtrace_command_1 (argPtr, (argIndicatingFullTrace >= 0), from_tty);
1219 if (argIndicatingFullTrace >= 0 && totArgLen > 0)
1223 do_cleanups (old_chain);
1226 static void backtrace_full_command (char *arg, int from_tty);
1228 backtrace_full_command (char *arg, int from_tty)
1230 backtrace_command_1 (arg, 1, from_tty);
1234 /* Print the local variables of a block B active in FRAME.
1235 Return 1 if any variables were printed; 0 otherwise. */
1238 print_block_frame_locals (struct block *b, register struct frame_info *fi,
1239 int num_tabs, register struct ui_file *stream)
1243 register struct symbol *sym;
1244 register int values_printed = 0;
1246 nsyms = BLOCK_NSYMS (b);
1248 for (i = 0; i < nsyms; i++)
1250 sym = BLOCK_SYM (b, i);
1251 switch (SYMBOL_CLASS (sym))
1258 for (j = 0; j < num_tabs; j++)
1259 fputs_filtered ("\t", stream);
1260 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1261 fputs_filtered (" = ", stream);
1262 print_variable_value (sym, fi, stream);
1263 fprintf_filtered (stream, "\n");
1267 /* Ignore symbols which are not locals. */
1271 return values_printed;
1274 /* Same, but print labels. */
1277 print_block_frame_labels (struct block *b, int *have_default,
1278 register struct ui_file *stream)
1282 register struct symbol *sym;
1283 register int values_printed = 0;
1285 nsyms = BLOCK_NSYMS (b);
1287 for (i = 0; i < nsyms; i++)
1289 sym = BLOCK_SYM (b, i);
1290 if (STREQ (SYMBOL_NAME (sym), "default"))
1296 if (SYMBOL_CLASS (sym) == LOC_LABEL)
1298 struct symtab_and_line sal;
1299 sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
1301 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1304 fprintf_filtered (stream, " ");
1305 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym), 1, stream);
1307 fprintf_filtered (stream, " in file %s, line %d\n",
1308 sal.symtab->filename, sal.line);
1311 return values_printed;
1314 /* Print on STREAM all the local variables in frame FRAME,
1315 including all the blocks active in that frame
1318 Returns 1 if the job was done,
1319 or 0 if nothing was printed because we have no info
1320 on the function running in FRAME. */
1323 print_frame_local_vars (register struct frame_info *fi, register int num_tabs,
1324 register struct ui_file *stream)
1326 register struct block *block = get_frame_block (fi);
1327 register int values_printed = 0;
1331 fprintf_filtered (stream, "No symbol table info available.\n");
1337 if (print_block_frame_locals (block, fi, num_tabs, stream))
1339 /* After handling the function's top-level block, stop.
1340 Don't continue to its superblock, the block of
1341 per-file symbols. */
1342 if (BLOCK_FUNCTION (block))
1344 block = BLOCK_SUPERBLOCK (block);
1347 if (!values_printed)
1349 fprintf_filtered (stream, "No locals.\n");
1353 /* Same, but print labels. */
1356 print_frame_label_vars (register struct frame_info *fi, int this_level_only,
1357 register struct ui_file *stream)
1359 register struct blockvector *bl;
1360 register struct block *block = get_frame_block (fi);
1361 register int values_printed = 0;
1362 int index, have_default = 0;
1363 char *blocks_printed;
1364 CORE_ADDR pc = fi->pc;
1368 fprintf_filtered (stream, "No symbol table info available.\n");
1372 bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
1373 blocks_printed = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
1374 memset (blocks_printed, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
1378 CORE_ADDR end = BLOCK_END (block) - 4;
1381 if (bl != blockvector_for_pc (end, &index))
1382 error ("blockvector blotch");
1383 if (BLOCKVECTOR_BLOCK (bl, index) != block)
1384 error ("blockvector botch");
1385 last_index = BLOCKVECTOR_NBLOCKS (bl);
1388 /* Don't print out blocks that have gone by. */
1389 while (index < last_index
1390 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
1393 while (index < last_index
1394 && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
1396 if (blocks_printed[index] == 0)
1398 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl, index), &have_default, stream))
1400 blocks_printed[index] = 1;
1406 if (values_printed && this_level_only)
1409 /* After handling the function's top-level block, stop.
1410 Don't continue to its superblock, the block of
1411 per-file symbols. */
1412 if (BLOCK_FUNCTION (block))
1414 block = BLOCK_SUPERBLOCK (block);
1417 if (!values_printed && !this_level_only)
1419 fprintf_filtered (stream, "No catches.\n");
1425 locals_info (char *args, int from_tty)
1427 if (!selected_frame)
1428 error ("No frame selected.");
1429 print_frame_local_vars (selected_frame, 0, gdb_stdout);
1433 catch_info (char *ignore, int from_tty)
1435 struct symtab_and_line *sal;
1437 /* Check for target support for exception handling */
1438 sal = target_enable_exception_callback (EX_EVENT_CATCH, 1);
1441 /* Currently not handling this */
1442 /* Ideally, here we should interact with the C++ runtime
1443 system to find the list of active handlers, etc. */
1444 fprintf_filtered (gdb_stdout, "Info catch not supported with this target/compiler combination.\n");
1446 if (!selected_frame)
1447 error ("No frame selected.");
1452 /* Assume g++ compiled code -- old v 4.16 behaviour */
1453 if (!selected_frame)
1454 error ("No frame selected.");
1456 print_frame_label_vars (selected_frame, 0, gdb_stdout);
1461 print_frame_arg_vars (register struct frame_info *fi,
1462 register struct ui_file *stream)
1464 struct symbol *func = get_frame_function (fi);
1465 register struct block *b;
1468 register struct symbol *sym, *sym2;
1469 register int values_printed = 0;
1473 fprintf_filtered (stream, "No symbol table info available.\n");
1477 b = SYMBOL_BLOCK_VALUE (func);
1478 nsyms = BLOCK_NSYMS (b);
1480 for (i = 0; i < nsyms; i++)
1482 sym = BLOCK_SYM (b, i);
1483 switch (SYMBOL_CLASS (sym))
1489 case LOC_REGPARM_ADDR:
1490 case LOC_BASEREG_ARG:
1492 fputs_filtered (SYMBOL_SOURCE_NAME (sym), stream);
1493 fputs_filtered (" = ", stream);
1495 /* We have to look up the symbol because arguments can have
1496 two entries (one a parameter, one a local) and the one we
1497 want is the local, which lookup_symbol will find for us.
1498 This includes gcc1 (not gcc2) on the sparc when passing a
1499 small structure and gcc2 when the argument type is float
1500 and it is passed as a double and converted to float by
1501 the prologue (in the latter case the type of the LOC_ARG
1502 symbol is double and the type of the LOC_LOCAL symbol is
1503 float). There are also LOC_ARG/LOC_REGISTER pairs which
1504 are not combined in symbol-reading. */
1506 sym2 = lookup_symbol (SYMBOL_NAME (sym),
1507 b, VAR_NAMESPACE, (int *) NULL, (struct symtab **) NULL);
1508 print_variable_value (sym2, fi, stream);
1509 fprintf_filtered (stream, "\n");
1513 /* Don't worry about things which aren't arguments. */
1518 if (!values_printed)
1520 fprintf_filtered (stream, "No arguments.\n");
1525 args_info (char *ignore, int from_tty)
1527 if (!selected_frame)
1528 error ("No frame selected.");
1529 print_frame_arg_vars (selected_frame, gdb_stdout);
1534 args_plus_locals_info (char *ignore, int from_tty)
1536 args_info (ignore, from_tty);
1537 locals_info (ignore, from_tty);
1541 /* Select frame FI, and note that its stack level is LEVEL.
1542 LEVEL may be -1 if an actual level number is not known. */
1545 select_frame (struct frame_info *fi, int level)
1547 register struct symtab *s;
1549 selected_frame = fi;
1550 selected_frame_level = level;
1551 if (selected_frame_level_changed_hook)
1552 selected_frame_level_changed_hook (level);
1554 /* Ensure that symbols for this frame are read in. Also, determine the
1555 source language of this frame, and switch to it if desired. */
1558 s = find_pc_symtab (fi->pc);
1560 && s->language != current_language->la_language
1561 && s->language != language_unknown
1562 && language_mode == language_mode_auto)
1564 set_language (s->language);
1566 /* elz: this if here fixes the problem with the pc not being displayed
1567 in the tui asm layout, with no debug symbols. The value of s
1568 would be 0 here, and select_source_symtab would abort the
1569 command by calling the 'error' function */
1572 TUIDO (((TuiOpaqueFuncPtr) tui_vSelectSourceSymtab, s));
1578 /* Select frame FI, noting that its stack level is LEVEL. Also print
1579 the stack frame and show the source if this is the tui version. */
1581 select_and_print_frame (struct frame_info *fi, int level)
1583 select_frame (fi, level);
1586 print_stack_frame (fi, level, 1);
1587 TUIDO (((TuiOpaqueFuncPtr) tui_vCheckDataValues, fi));
1592 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1596 select_and_maybe_print_frame (struct frame_info *fi, int level)
1599 select_frame (fi, level);
1601 select_and_print_frame (fi, level);
1606 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1607 If there is no selected frame, *FRAMEP is set to NULL. */
1610 record_selected_frame (CORE_ADDR *frameaddrp, int *levelp)
1612 *frameaddrp = selected_frame ? selected_frame->frame : 0;
1613 *levelp = selected_frame_level;
1616 /* Return the symbol-block in which the selected frame is executing.
1617 Can return zero under various legitimate circumstances. */
1620 get_selected_block (void)
1622 if (!target_has_stack)
1625 if (!selected_frame)
1626 return get_current_block ();
1627 return get_frame_block (selected_frame);
1630 /* Find a frame a certain number of levels away from FRAME.
1631 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1632 Positive means go to earlier frames (up); negative, the reverse.
1633 The int that contains the number of levels is counted toward
1634 zero as the frames for those levels are found.
1635 If the top or bottom frame is reached, that frame is returned,
1636 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1637 how much farther the original request asked to go. */
1640 find_relative_frame (register struct frame_info *frame,
1641 register int *level_offset_ptr)
1643 register struct frame_info *prev;
1644 register struct frame_info *frame1;
1646 /* Going up is simple: just do get_prev_frame enough times
1647 or until initial frame is reached. */
1648 while (*level_offset_ptr > 0)
1650 prev = get_prev_frame (frame);
1653 (*level_offset_ptr)--;
1656 /* Going down is just as simple. */
1657 if (*level_offset_ptr < 0)
1659 while (*level_offset_ptr < 0)
1661 frame1 = get_next_frame (frame);
1665 (*level_offset_ptr)++;
1671 /* The "select_frame" command. With no arg, NOP.
1672 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1673 valid level. Otherwise, treat level_exp as an address expression
1674 and select it. See parse_frame_specification for more info on proper
1675 frame expressions. */
1680 select_frame_command_wrapper (char *level_exp, int from_tty)
1682 select_frame_command (level_exp, from_tty);
1686 select_frame_command (char *level_exp, int from_tty)
1688 register struct frame_info *frame, *frame1;
1689 unsigned int level = 0;
1691 if (!target_has_stack)
1692 error ("No stack.");
1694 frame = parse_frame_specification (level_exp);
1696 /* Try to figure out what level this frame is. But if there is
1697 no current stack, don't error out -- let the user set one. */
1699 if (get_current_frame ())
1701 for (frame1 = get_prev_frame (0);
1702 frame1 && frame1 != frame;
1703 frame1 = get_prev_frame (frame1))
1710 select_frame (frame, level);
1713 /* The "frame" command. With no arg, print selected frame briefly.
1714 With arg, behaves like select_frame and then prints the selected
1718 frame_command (char *level_exp, int from_tty)
1720 select_frame_command (level_exp, from_tty);
1721 show_and_print_stack_frame (selected_frame, selected_frame_level, 1);
1724 /* The XDB Compatibility command to print the current frame. */
1727 current_frame_command (char *level_exp, int from_tty)
1729 if (target_has_stack == 0 || selected_frame == 0)
1730 error ("No stack.");
1731 print_only_stack_frame (selected_frame, selected_frame_level, 1);
1734 /* Select the frame up one or COUNT stack levels
1735 from the previously selected frame, and print it briefly. */
1739 up_silently_base (char *count_exp)
1741 register struct frame_info *fi;
1742 int count = 1, count1;
1744 count = parse_and_eval_long (count_exp);
1747 if (target_has_stack == 0 || selected_frame == 0)
1748 error ("No stack.");
1750 fi = find_relative_frame (selected_frame, &count1);
1751 if (count1 != 0 && count_exp == 0)
1752 error ("Initial frame selected; you cannot go up.");
1753 select_frame (fi, selected_frame_level + count - count1);
1757 up_silently_command (char *count_exp, int from_tty)
1759 up_silently_base (count_exp);
1761 print_stack_frame (selected_frame, selected_frame_level, 1);
1765 up_command (char *count_exp, int from_tty)
1767 up_silently_base (count_exp);
1768 show_and_print_stack_frame (selected_frame, selected_frame_level, 1);
1771 /* Select the frame down one or COUNT stack levels
1772 from the previously selected frame, and print it briefly. */
1776 down_silently_base (char *count_exp)
1778 register struct frame_info *frame;
1779 int count = -1, count1;
1781 count = -parse_and_eval_long (count_exp);
1784 if (target_has_stack == 0 || selected_frame == 0)
1785 error ("No stack.");
1787 frame = find_relative_frame (selected_frame, &count1);
1788 if (count1 != 0 && count_exp == 0)
1791 /* We only do this if count_exp is not specified. That way "down"
1792 means to really go down (and let me know if that is
1793 impossible), but "down 9999" can be used to mean go all the way
1794 down without getting an error. */
1796 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1799 select_frame (frame, selected_frame_level + count - count1);
1804 down_silently_command (char *count_exp, int from_tty)
1806 down_silently_base (count_exp);
1808 print_stack_frame (selected_frame, selected_frame_level, 1);
1812 down_command (char *count_exp, int from_tty)
1814 down_silently_base (count_exp);
1815 show_and_print_stack_frame (selected_frame, selected_frame_level, 1);
1820 return_command_wrapper (char *retval_exp, int from_tty)
1822 return_command (retval_exp, from_tty);
1826 return_command (char *retval_exp, int from_tty)
1828 struct symbol *thisfun;
1829 CORE_ADDR selected_frame_addr;
1830 CORE_ADDR selected_frame_pc;
1831 struct frame_info *frame;
1832 value_ptr return_value = NULL;
1834 if (selected_frame == NULL)
1835 error ("No selected frame.");
1836 thisfun = get_frame_function (selected_frame);
1837 selected_frame_addr = FRAME_FP (selected_frame);
1838 selected_frame_pc = selected_frame->pc;
1840 /* Compute the return value (if any -- possibly getting errors here). */
1844 struct type *return_type = NULL;
1846 return_value = parse_and_eval (retval_exp);
1848 /* Cast return value to the return type of the function. */
1849 if (thisfun != NULL)
1850 return_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun));
1851 if (return_type == NULL)
1852 return_type = builtin_type_int;
1853 return_value = value_cast (return_type, return_value);
1855 /* Make sure we have fully evaluated it, since
1856 it might live in the stack frame we're about to pop. */
1857 if (VALUE_LAZY (return_value))
1858 value_fetch_lazy (return_value);
1861 /* If interactive, require confirmation. */
1867 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun)))
1869 error ("Not confirmed.");
1873 else if (!query ("Make selected stack frame return now? "))
1874 error ("Not confirmed.");
1877 /* Do the real work. Pop until the specified frame is current. We
1878 use this method because the selected_frame is not valid after
1879 a POP_FRAME. The pc comparison makes this work even if the
1880 selected frame shares its fp with another frame. */
1882 while (selected_frame_addr != (frame = get_current_frame ())->frame
1883 || selected_frame_pc != frame->pc)
1886 /* Then pop that frame. */
1890 /* Compute the return value (if any) and store in the place
1891 for return values. */
1894 set_return_value (return_value);
1896 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1898 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1899 FRAME_FP (get_current_frame ())))
1902 /* If interactive, print the frame that is now current. */
1905 frame_command ("0", 1);
1907 select_frame_command ("0", 0);
1910 /* Sets the scope to input function name, provided that the
1911 function is within the current stack frame */
1913 struct function_bounds
1915 CORE_ADDR low, high;
1918 static void func_command (char *arg, int from_tty);
1920 func_command (char *arg, int from_tty)
1922 struct frame_info *fp;
1924 struct symtabs_and_lines sals;
1927 struct function_bounds *func_bounds = (struct function_bounds *) NULL;
1929 if (arg != (char *) NULL)
1932 fp = parse_frame_specification ("0");
1933 sals = decode_line_spec (arg, 1);
1934 func_bounds = (struct function_bounds *) xmalloc (
1935 sizeof (struct function_bounds) * sals.nelts);
1936 for (i = 0; (i < sals.nelts && !found); i++)
1938 if (sals.sals[i].pc == (CORE_ADDR) 0 ||
1939 find_pc_partial_function (sals.sals[i].pc,
1941 &func_bounds[i].low,
1942 &func_bounds[i].high) == 0)
1944 func_bounds[i].low =
1945 func_bounds[i].high = (CORE_ADDR) NULL;
1951 for (i = 0; (i < sals.nelts && !found); i++)
1952 found = (fp->pc >= func_bounds[i].low &&
1953 fp->pc < func_bounds[i].high);
1957 fp = find_relative_frame (fp, &level);
1960 while (!found && level == 0);
1963 xfree (func_bounds);
1966 printf_filtered ("'%s' not within current stack frame.\n", arg);
1967 else if (fp != selected_frame)
1968 select_and_print_frame (fp, level);
1971 /* Gets the language of the current frame. */
1974 get_frame_language (void)
1976 register struct symtab *s;
1977 enum language flang; /* The language of the current frame */
1981 s = find_pc_symtab (selected_frame->pc);
1983 flang = s->language;
1985 flang = language_unknown;
1988 flang = language_unknown;
1994 _initialize_stack (void)
1997 backtrace_limit = 30;
2000 add_com ("return", class_stack, return_command,
2001 "Make selected stack frame return to its caller.\n\
2002 Control remains in the debugger, but when you continue\n\
2003 execution will resume in the frame above the one now selected.\n\
2004 If an argument is given, it is an expression for the value to return.");
2006 add_com ("up", class_stack, up_command,
2007 "Select and print stack frame that called this one.\n\
2008 An argument says how many frames up to go.");
2009 add_com ("up-silently", class_support, up_silently_command,
2010 "Same as the `up' command, but does not print anything.\n\
2011 This is useful in command scripts.");
2013 add_com ("down", class_stack, down_command,
2014 "Select and print stack frame called by this one.\n\
2015 An argument says how many frames down to go.");
2016 add_com_alias ("do", "down", class_stack, 1);
2017 add_com_alias ("dow", "down", class_stack, 1);
2018 add_com ("down-silently", class_support, down_silently_command,
2019 "Same as the `down' command, but does not print anything.\n\
2020 This is useful in command scripts.");
2022 add_com ("frame", class_stack, frame_command,
2023 "Select and print a stack frame.\n\
2024 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2025 An argument specifies the frame to select.\n\
2026 It can be a stack frame number or the address of the frame.\n\
2027 With argument, nothing is printed if input is coming from\n\
2028 a command file or a user-defined command.");
2030 add_com_alias ("f", "frame", class_stack, 1);
2034 add_com ("L", class_stack, current_frame_command,
2035 "Print the current stack frame.\n");
2036 add_com_alias ("V", "frame", class_stack, 1);
2038 add_com ("select-frame", class_stack, select_frame_command,
2039 "Select a stack frame without printing anything.\n\
2040 An argument specifies the frame to select.\n\
2041 It can be a stack frame number or the address of the frame.\n");
2043 add_com ("backtrace", class_stack, backtrace_command,
2044 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2045 With a negative argument, print outermost -COUNT frames.\n\
2046 Use of the 'full' qualifier also prints the values of the local variables.\n");
2047 add_com_alias ("bt", "backtrace", class_stack, 0);
2050 add_com_alias ("t", "backtrace", class_stack, 0);
2051 add_com ("T", class_stack, backtrace_full_command,
2052 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2053 and the values of the local variables.\n\
2054 With a negative argument, print outermost -COUNT frames.\n\
2055 Usage: T <count>\n");
2058 add_com_alias ("where", "backtrace", class_alias, 0);
2059 add_info ("stack", backtrace_command,
2060 "Backtrace of the stack, or innermost COUNT frames.");
2061 add_info_alias ("s", "stack", 1);
2062 add_info ("frame", frame_info,
2063 "All about selected stack frame, or frame at ADDR.");
2064 add_info_alias ("f", "frame", 1);
2065 add_info ("locals", locals_info,
2066 "Local variables of current stack frame.");
2067 add_info ("args", args_info,
2068 "Argument variables of current stack frame.");
2070 add_com ("l", class_info, args_plus_locals_info,
2071 "Argument and local variables of current stack frame.");
2074 add_com ("func", class_stack, func_command,
2075 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2077 add_info ("catch", catch_info,
2078 "Exceptions that can be caught in the current stack frame.");
2081 add_cmd ("backtrace-limit", class_stack, set_backtrace_limit_command,
2082 "Specify maximum number of frames for \"backtrace\" to print by default.",
2084 add_info ("backtrace-limit", backtrace_limit_info,
2085 "The maximum number of frames for \"backtrace\" to print by default.");