1 /* Print values for GNU debugger GDB.
2 Copyright 1986-1991, 1993-1995, 1998, 2000 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
22 #include "gdb_string.h"
28 #include "expression.h"
32 #include "breakpoint.h"
36 #include "symfile.h" /* for overlay functions */
37 #include "objfiles.h" /* ditto */
42 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
43 extern int addressprint
; /* Whether to print hex addresses in HLL " */
52 /* Last specified output format. */
54 static char last_format
= 'x';
56 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
58 static char last_size
= 'w';
60 /* Default address to examine next. */
62 static CORE_ADDR next_address
;
64 /* Default section to examine next. */
66 static asection
*next_section
;
68 /* Last address examined. */
70 static CORE_ADDR last_examine_address
;
72 /* Contents of last address examined.
73 This is not valid past the end of the `x' command! */
75 static value_ptr last_examine_value
;
77 /* Largest offset between a symbolic value and an address, that will be
78 printed as `0x1234 <symbol+offset>'. */
80 static unsigned int max_symbolic_offset
= UINT_MAX
;
82 /* Append the source filename and linenumber of the symbol when
83 printing a symbolic value as `<symbol at filename:linenum>' if set. */
84 static int print_symbol_filename
= 0;
86 /* Number of auto-display expression currently being displayed.
87 So that we can disable it if we get an error or a signal within it.
88 -1 when not doing one. */
90 int current_display_number
;
92 /* Flag to low-level print routines that this value is being printed
93 in an epoch window. We'd like to pass this as a parameter, but
94 every routine would need to take it. Perhaps we can encapsulate
95 this in the I/O stream once we have GNU stdio. */
101 /* Chain link to next auto-display item. */
102 struct display
*next
;
103 /* Expression to be evaluated and displayed. */
104 struct expression
*exp
;
105 /* Item number of this auto-display item. */
107 /* Display format specified. */
108 struct format_data format
;
109 /* Innermost block required by this expression when evaluated */
111 /* Status of this display (enabled or disabled) */
115 /* Chain of expressions whose values should be displayed
116 automatically each time the program stops. */
118 static struct display
*display_chain
;
120 static int display_number
;
122 /* Prototypes for exported functions. */
124 void output_command
PARAMS ((char *, int));
126 void _initialize_printcmd
PARAMS ((void));
128 /* Prototypes for local functions. */
130 static void delete_display
PARAMS ((int));
132 static void enable_display
PARAMS ((char *, int));
134 static void disable_display_command
PARAMS ((char *, int));
136 static void disassemble_command
PARAMS ((char *, int));
138 static void printf_command
PARAMS ((char *, int));
140 static void print_frame_nameless_args (struct frame_info
*, long,
141 int, int, struct ui_file
*);
143 static void display_info
PARAMS ((char *, int));
145 static void do_one_display
PARAMS ((struct display
*));
147 static void undisplay_command
PARAMS ((char *, int));
149 static void free_display
PARAMS ((struct display
*));
151 static void display_command
PARAMS ((char *, int));
153 void x_command
PARAMS ((char *, int));
155 static void address_info
PARAMS ((char *, int));
157 static void set_command
PARAMS ((char *, int));
159 static void call_command
PARAMS ((char *, int));
161 static void inspect_command
PARAMS ((char *, int));
163 static void print_command
PARAMS ((char *, int));
165 static void print_command_1
PARAMS ((char *, int, int));
167 static void validate_format
PARAMS ((struct format_data
, char *));
169 static void do_examine
PARAMS ((struct format_data
, CORE_ADDR addr
, asection
* section
));
171 static void print_formatted (value_ptr
, int, int, struct ui_file
*);
173 static struct format_data decode_format
PARAMS ((char **, int, int));
175 static int print_insn (CORE_ADDR
, struct ui_file
*);
177 static void sym_info
PARAMS ((char *, int));
180 /* Decode a format specification. *STRING_PTR should point to it.
181 OFORMAT and OSIZE are used as defaults for the format and size
182 if none are given in the format specification.
183 If OSIZE is zero, then the size field of the returned value
184 should be set only if a size is explicitly specified by the
186 The structure returned describes all the data
187 found in the specification. In addition, *STRING_PTR is advanced
188 past the specification and past all whitespace following it. */
190 static struct format_data
191 decode_format (string_ptr
, oformat
, osize
)
196 struct format_data val
;
197 register char *p
= *string_ptr
;
203 if (*p
>= '0' && *p
<= '9')
204 val
.count
= atoi (p
);
205 while (*p
>= '0' && *p
<= '9')
208 /* Now process size or format letters that follow. */
212 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
214 else if (*p
>= 'a' && *p
<= 'z')
220 while (*p
== ' ' || *p
== '\t')
224 /* Set defaults for format and size if not specified. */
225 if (val
.format
== '?')
229 /* Neither has been specified. */
230 val
.format
= oformat
;
234 /* If a size is specified, any format makes a reasonable
235 default except 'i'. */
236 val
.format
= oformat
== 'i' ? 'x' : oformat
;
238 else if (val
.size
== '?')
243 /* Pick the appropriate size for an address. */
244 if (TARGET_PTR_BIT
== 64)
245 val
.size
= osize
? 'g' : osize
;
246 else if (TARGET_PTR_BIT
== 32)
247 val
.size
= osize
? 'w' : osize
;
248 else if (TARGET_PTR_BIT
== 16)
249 val
.size
= osize
? 'h' : osize
;
251 /* Bad value for TARGET_PTR_BIT */
255 /* Floating point has to be word or giantword. */
256 if (osize
== 'w' || osize
== 'g')
259 /* Default it to giantword if the last used size is not
261 val
.size
= osize
? 'g' : osize
;
264 /* Characters default to one byte. */
265 val
.size
= osize
? 'b' : osize
;
268 /* The default is the size most recently specified. */
275 /* Print value VAL on stream according to FORMAT, a letter or 0.
276 Do not end with a newline.
277 0 means print VAL according to its own type.
278 SIZE is the letter for the size of datum being printed.
279 This is used to pad hex numbers so they line up. */
282 print_formatted (val
, format
, size
, stream
)
283 register value_ptr val
;
286 struct ui_file
*stream
;
288 struct type
*type
= check_typedef (VALUE_TYPE (val
));
289 int len
= TYPE_LENGTH (type
);
291 if (VALUE_LVAL (val
) == lval_memory
)
293 next_address
= VALUE_ADDRESS (val
) + len
;
294 next_section
= VALUE_BFD_SECTION (val
);
300 /* FIXME: Need to handle wchar_t's here... */
301 next_address
= VALUE_ADDRESS (val
)
302 + val_print_string (VALUE_ADDRESS (val
), -1, 1, stream
);
303 next_section
= VALUE_BFD_SECTION (val
);
307 /* The old comment says
308 "Force output out, print_insn not using _filtered".
309 I'm not completely sure what that means, I suspect most print_insn
310 now do use _filtered, so I guess it's obsolete.
311 --Yes, it does filter now, and so this is obsolete. -JB */
313 /* We often wrap here if there are long symbolic names. */
315 next_address
= VALUE_ADDRESS (val
)
316 + print_insn (VALUE_ADDRESS (val
), stream
);
317 next_section
= VALUE_BFD_SECTION (val
);
322 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
323 || TYPE_CODE (type
) == TYPE_CODE_STRING
324 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
325 || TYPE_CODE (type
) == TYPE_CODE_UNION
)
326 /* If format is 0, use the 'natural' format for
327 * that type of value. If the type is non-scalar,
328 * we have to use language rules to print it as
329 * a series of scalars.
331 value_print (val
, stream
, format
, Val_pretty_default
);
333 /* User specified format, so don't look to the
334 * the type to tell us what to do.
336 print_scalar_formatted (VALUE_CONTENTS (val
), type
,
337 format
, size
, stream
);
341 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
342 according to letters FORMAT and SIZE on STREAM.
343 FORMAT may not be zero. Formats s and i are not supported at this level.
345 This is how the elements of an array or structure are printed
349 print_scalar_formatted (valaddr
, type
, format
, size
, stream
)
354 struct ui_file
*stream
;
357 unsigned int len
= TYPE_LENGTH (type
);
359 if (len
> sizeof (LONGEST
)
367 if (!TYPE_UNSIGNED (type
)
368 || !extract_long_unsigned_integer (valaddr
, len
, &val_long
))
370 /* We can't print it normally, but we can print it in hex.
371 Printing it in the wrong radix is more useful than saying
372 "use /x, you dummy". */
373 /* FIXME: we could also do octal or binary if that was the
375 /* FIXME: we should be using the size field to give us a
376 minimum field width to print. */
379 print_octal_chars (stream
, valaddr
, len
);
380 else if (format
== 'd')
381 print_decimal_chars (stream
, valaddr
, len
);
382 else if (format
== 't')
383 print_binary_chars (stream
, valaddr
, len
);
385 /* replace with call to print_hex_chars? Looks
386 like val_print_type_code_int is redoing
389 val_print_type_code_int (type
, valaddr
, stream
);
394 /* If we get here, extract_long_unsigned_integer set val_long. */
396 else if (format
!= 'f')
397 val_long
= unpack_long (type
, valaddr
);
399 /* If we are printing it as unsigned, truncate it in case it is actually
400 a negative signed value (e.g. "print/u (short)-1" should print 65535
401 (if shorts are 16 bits) instead of 4294967295). */
404 if (len
< sizeof (LONGEST
))
405 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
413 /* no size specified, like in print. Print varying # of digits. */
414 print_longest (stream
, 'x', 1, val_long
);
423 print_longest (stream
, size
, 1, val_long
);
426 error ("Undefined output size \"%c\".", size
);
431 print_longest (stream
, 'd', 1, val_long
);
435 print_longest (stream
, 'u', 0, val_long
);
440 print_longest (stream
, 'o', 1, val_long
);
442 fprintf_filtered (stream
, "0");
446 print_address (unpack_pointer (type
, valaddr
), stream
);
450 value_print (value_from_longest (builtin_type_true_char
, val_long
),
451 stream
, 0, Val_pretty_default
);
455 if (len
== sizeof (float))
456 type
= builtin_type_float
;
457 else if (len
== sizeof (double))
458 type
= builtin_type_double
;
459 print_floating (valaddr
, type
, stream
);
466 /* Binary; 't' stands for "two". */
468 char bits
[8 * (sizeof val_long
) + 1];
469 char buf
[8 * (sizeof val_long
) + 32];
474 width
= 8 * (sizeof val_long
);
491 error ("Undefined output size \"%c\".", size
);
497 bits
[width
] = (val_long
& 1) ? '1' : '0';
502 while (*cp
&& *cp
== '0')
507 strcpy (buf
, local_binary_format_prefix ());
509 strcat (buf
, local_binary_format_suffix ());
510 fprintf_filtered (stream
, buf
);
515 error ("Undefined output format \"%c\".", format
);
519 /* Specify default address for `x' command.
520 `info lines' uses this. */
523 set_next_address (addr
)
528 /* Make address available to the user as $_. */
529 set_internalvar (lookup_internalvar ("_"),
530 value_from_longest (lookup_pointer_type (builtin_type_void
),
534 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
535 after LEADIN. Print nothing if no symbolic name is found nearby.
536 Optionally also print source file and line number, if available.
537 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
538 or to interpret it as a possible C++ name and convert it back to source
539 form. However note that DO_DEMANGLE can be overridden by the specific
540 settings of the demangle and asm_demangle variables. */
543 print_address_symbolic (addr
, stream
, do_demangle
, leadin
)
545 struct ui_file
*stream
;
550 char *filename
= NULL
;
555 struct cleanup
*cleanup_chain
= make_cleanup (free
, name
);
556 if (print_symbol_filename
)
557 make_cleanup (free
, filename
);
559 if (build_address_symbolic (addr
, do_demangle
, &name
, &offset
, &filename
, &line
, &unmapped
))
562 fputs_filtered (leadin
, stream
);
564 fputs_filtered ("<*", stream
);
566 fputs_filtered ("<", stream
);
567 fputs_filtered (name
, stream
);
569 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
571 /* Append source filename and line number if desired. Give specific
572 line # of this addr, if we have it; else line # of the nearest symbol. */
573 if (print_symbol_filename
&& filename
!= NULL
)
576 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
578 fprintf_filtered (stream
, " in %s", filename
);
581 fputs_filtered ("*>", stream
);
583 fputs_filtered (">", stream
);
585 do_cleanups (cleanup_chain
);
588 /* Given an address ADDR return all the elements needed to print the
589 address in a symbolic form. NAME can be mangled or not depending
590 on DO_DEMANGLE (and also on the asm_demangle global variable,
591 manipulated via ''set print asm-demangle''). Return 0 in case of
592 success, when all the info in the OUT paramters is valid. Return 1
595 build_address_symbolic (CORE_ADDR addr
, /* IN */
596 int do_demangle
, /* IN */
597 char **name
, /* OUT */
598 int *offset
, /* OUT */
599 char **filename
, /* OUT */
601 int *unmapped
) /* OUT */
603 struct minimal_symbol
*msymbol
;
604 struct symbol
*symbol
;
605 struct symtab
*symtab
= 0;
606 CORE_ADDR name_location
= 0;
607 asection
*section
= 0;
608 char *name_temp
= "";
610 /* Let's say it is unmapped. */
613 /* Determine if the address is in an overlay, and whether it is
615 if (overlay_debugging
)
617 section
= find_pc_overlay (addr
);
618 if (pc_in_unmapped_range (addr
, section
))
621 addr
= overlay_mapped_address (addr
, section
);
625 /* On some targets, add in extra "flag" bits to PC for
626 disassembly. This should ensure that "rounding errors" in
627 symbol addresses that are masked for disassembly favour the
628 the correct symbol. */
630 #ifdef GDB_TARGET_UNMASK_DISAS_PC
631 addr
= GDB_TARGET_UNMASK_DISAS_PC (addr
);
634 /* First try to find the address in the symbol table, then
635 in the minsyms. Take the closest one. */
637 /* This is defective in the sense that it only finds text symbols. So
638 really this is kind of pointless--we should make sure that the
639 minimal symbols have everything we need (by changing that we could
640 save some memory, but for many debug format--ELF/DWARF or
641 anything/stabs--it would be inconvenient to eliminate those minimal
643 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
644 symbol
= find_pc_sect_function (addr
, section
);
648 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
650 name_temp
= SYMBOL_SOURCE_NAME (symbol
);
652 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
657 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
659 /* The msymbol is closer to the address than the symbol;
660 use the msymbol instead. */
663 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
665 name_temp
= SYMBOL_SOURCE_NAME (msymbol
);
667 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
670 if (symbol
== NULL
&& msymbol
== NULL
)
673 /* On some targets, mask out extra "flag" bits from PC for handsome
676 #ifdef GDB_TARGET_MASK_DISAS_PC
677 name_location
= GDB_TARGET_MASK_DISAS_PC (name_location
);
678 addr
= GDB_TARGET_MASK_DISAS_PC (addr
);
681 /* If the nearest symbol is too far away, don't print anything symbolic. */
683 /* For when CORE_ADDR is larger than unsigned int, we do math in
684 CORE_ADDR. But when we detect unsigned wraparound in the
685 CORE_ADDR math, we ignore this test and print the offset,
686 because addr+max_symbolic_offset has wrapped through the end
687 of the address space back to the beginning, giving bogus comparison. */
688 if (addr
> name_location
+ max_symbolic_offset
689 && name_location
+ max_symbolic_offset
> name_location
)
692 *offset
= addr
- name_location
;
694 *name
= xstrdup (name_temp
);
696 if (print_symbol_filename
)
698 struct symtab_and_line sal
;
700 sal
= find_pc_sect_line (addr
, section
, 0);
704 *filename
= xstrdup (sal
.symtab
->filename
);
707 else if (symtab
&& symbol
&& symbol
->line
)
709 *filename
= xstrdup (symtab
->filename
);
710 *line
= symbol
->line
;
714 *filename
= xstrdup (symtab
->filename
);
721 /* Print address ADDR on STREAM. USE_LOCAL means the same thing as for
724 print_address_numeric (addr
, use_local
, stream
)
727 struct ui_file
*stream
;
729 /* This assumes a CORE_ADDR can fit in a LONGEST. Probably a safe
731 print_longest (stream
, 'x', use_local
, (ULONGEST
) addr
);
734 /* Print address ADDR symbolically on STREAM.
735 First print it as a number. Then perhaps print
736 <SYMBOL + OFFSET> after the number. */
739 print_address (addr
, stream
)
741 struct ui_file
*stream
;
743 print_address_numeric (addr
, 1, stream
);
744 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
747 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
748 controls whether to print the symbolic name "raw" or demangled.
749 Global setting "addressprint" controls whether to print hex address
753 print_address_demangle (addr
, stream
, do_demangle
)
755 struct ui_file
*stream
;
760 fprintf_filtered (stream
, "0");
762 else if (addressprint
)
764 print_address_numeric (addr
, 1, stream
);
765 print_address_symbolic (addr
, stream
, do_demangle
, " ");
769 print_address_symbolic (addr
, stream
, do_demangle
, "");
774 /* These are the types that $__ will get after an examine command of one
777 static struct type
*examine_i_type
;
779 static struct type
*examine_b_type
;
780 static struct type
*examine_h_type
;
781 static struct type
*examine_w_type
;
782 static struct type
*examine_g_type
;
784 /* Examine data at address ADDR in format FMT.
785 Fetch it from memory and print on gdb_stdout. */
788 do_examine (fmt
, addr
, sect
)
789 struct format_data fmt
;
793 register char format
= 0;
795 register int count
= 1;
796 struct type
*val_type
= NULL
;
798 register int maxelts
;
806 /* String or instruction format implies fetch single bytes
807 regardless of the specified size. */
808 if (format
== 's' || format
== 'i')
812 val_type
= examine_i_type
;
813 else if (size
== 'b')
814 val_type
= examine_b_type
;
815 else if (size
== 'h')
816 val_type
= examine_h_type
;
817 else if (size
== 'w')
818 val_type
= examine_w_type
;
819 else if (size
== 'g')
820 val_type
= examine_g_type
;
827 if (format
== 's' || format
== 'i')
830 /* Print as many objects as specified in COUNT, at most maxelts per line,
831 with the address of the next one at the start of each line. */
836 print_address (next_address
, gdb_stdout
);
837 printf_filtered (":");
842 printf_filtered ("\t");
843 /* Note that print_formatted sets next_address for the next
845 last_examine_address
= next_address
;
847 if (last_examine_value
)
848 value_free (last_examine_value
);
850 /* The value to be displayed is not fetched greedily.
851 Instead, to avoid the posibility of a fetched value not
852 being used, its retreval is delayed until the print code
853 uses it. When examining an instruction stream, the
854 disassembler will perform its own memory fetch using just
855 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
856 the disassembler be modified so that LAST_EXAMINE_VALUE
857 is left with the byte sequence from the last complete
858 instruction fetched from memory? */
859 last_examine_value
= value_at_lazy (val_type
, next_address
, sect
);
861 if (last_examine_value
)
862 release_value (last_examine_value
);
864 print_formatted (last_examine_value
, format
, size
, gdb_stdout
);
866 printf_filtered ("\n");
867 gdb_flush (gdb_stdout
);
872 validate_format (fmt
, cmdname
)
873 struct format_data fmt
;
877 error ("Size letters are meaningless in \"%s\" command.", cmdname
);
879 error ("Item count other than 1 is meaningless in \"%s\" command.",
881 if (fmt
.format
== 'i' || fmt
.format
== 's')
882 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
883 fmt
.format
, cmdname
);
886 /* Evaluate string EXP as an expression in the current language and
887 print the resulting value. EXP may contain a format specifier as the
888 first argument ("/x myvar" for example, to print myvar in hex).
892 print_command_1 (exp
, inspect
, voidprint
)
897 struct expression
*expr
;
898 register struct cleanup
*old_chain
= 0;
899 register char format
= 0;
900 register value_ptr val
;
901 struct format_data fmt
;
904 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
905 inspect_it
= inspect
;
907 if (exp
&& *exp
== '/')
910 fmt
= decode_format (&exp
, last_format
, 0);
911 validate_format (fmt
, "print");
912 last_format
= format
= fmt
.format
;
924 expr
= parse_expression (exp
);
925 old_chain
= make_cleanup ((make_cleanup_func
) free_current_contents
,
928 val
= evaluate_expression (expr
);
930 /* C++: figure out what type we actually want to print it as. */
931 type
= VALUE_TYPE (val
);
934 && (TYPE_CODE (type
) == TYPE_CODE_PTR
935 || TYPE_CODE (type
) == TYPE_CODE_REF
)
936 && (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_STRUCT
937 || TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_UNION
))
941 v
= value_from_vtable_info (val
, TYPE_TARGET_TYPE (type
));
945 type
= VALUE_TYPE (val
);
950 val
= access_value_history (0);
952 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
953 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
955 int histindex
= record_latest_value (val
);
958 annotate_value_history_begin (histindex
, VALUE_TYPE (val
));
960 annotate_value_begin (VALUE_TYPE (val
));
963 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
964 else if (histindex
>= 0)
965 printf_filtered ("$%d = ", histindex
);
968 annotate_value_history_value ();
970 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
971 printf_filtered ("\n");
974 annotate_value_history_end ();
976 annotate_value_end ();
979 printf_unfiltered ("\") )\030");
983 do_cleanups (old_chain
);
984 inspect_it
= 0; /* Reset print routines to normal */
989 print_command (exp
, from_tty
)
993 print_command_1 (exp
, 0, 1);
996 /* Same as print, except in epoch, it gets its own window */
999 inspect_command (exp
, from_tty
)
1003 extern int epoch_interface
;
1005 print_command_1 (exp
, epoch_interface
, 1);
1008 /* Same as print, except it doesn't print void results. */
1011 call_command (exp
, from_tty
)
1015 print_command_1 (exp
, 0, 0);
1020 output_command (exp
, from_tty
)
1024 struct expression
*expr
;
1025 register struct cleanup
*old_chain
;
1026 register char format
= 0;
1027 register value_ptr val
;
1028 struct format_data fmt
;
1030 if (exp
&& *exp
== '/')
1033 fmt
= decode_format (&exp
, 0, 0);
1034 validate_format (fmt
, "output");
1035 format
= fmt
.format
;
1038 expr
= parse_expression (exp
);
1039 old_chain
= make_cleanup ((make_cleanup_func
) free_current_contents
, &expr
);
1041 val
= evaluate_expression (expr
);
1043 annotate_value_begin (VALUE_TYPE (val
));
1045 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
1047 annotate_value_end ();
1050 gdb_flush (gdb_stdout
);
1052 do_cleanups (old_chain
);
1057 set_command (exp
, from_tty
)
1061 struct expression
*expr
= parse_expression (exp
);
1062 register struct cleanup
*old_chain
1063 = make_cleanup ((make_cleanup_func
) free_current_contents
, &expr
);
1064 evaluate_expression (expr
);
1065 do_cleanups (old_chain
);
1070 sym_info (arg
, from_tty
)
1074 struct minimal_symbol
*msymbol
;
1075 struct objfile
*objfile
;
1076 struct obj_section
*osect
;
1078 CORE_ADDR addr
, sect_addr
;
1080 unsigned int offset
;
1083 error_no_arg ("address");
1085 addr
= parse_and_eval_address (arg
);
1086 ALL_OBJSECTIONS (objfile
, osect
)
1088 sect
= osect
->the_bfd_section
;
1089 sect_addr
= overlay_mapped_address (addr
, sect
);
1091 if (osect
->addr
<= sect_addr
&& sect_addr
< osect
->endaddr
&&
1092 (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, sect
)))
1095 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1097 printf_filtered ("%s + %u in ",
1098 SYMBOL_SOURCE_NAME (msymbol
), offset
);
1100 printf_filtered ("%s in ",
1101 SYMBOL_SOURCE_NAME (msymbol
));
1102 if (pc_in_unmapped_range (addr
, sect
))
1103 printf_filtered ("load address range of ");
1104 if (section_is_overlay (sect
))
1105 printf_filtered ("%s overlay ",
1106 section_is_mapped (sect
) ? "mapped" : "unmapped");
1107 printf_filtered ("section %s", sect
->name
);
1108 printf_filtered ("\n");
1112 printf_filtered ("No symbol matches %s.\n", arg
);
1117 address_info (exp
, from_tty
)
1121 register struct symbol
*sym
;
1122 register struct minimal_symbol
*msymbol
;
1124 register long basereg
;
1126 CORE_ADDR load_addr
;
1127 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1128 if exp is a field of `this'. */
1131 error ("Argument required.");
1133 sym
= lookup_symbol (exp
, get_selected_block (), VAR_NAMESPACE
,
1134 &is_a_field_of_this
, (struct symtab
**) NULL
);
1137 if (is_a_field_of_this
)
1139 printf_filtered ("Symbol \"");
1140 fprintf_symbol_filtered (gdb_stdout
, exp
,
1141 current_language
->la_language
, DMGL_ANSI
);
1142 printf_filtered ("\" is a field of the local class variable `this'\n");
1146 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1148 if (msymbol
!= NULL
)
1150 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1152 printf_filtered ("Symbol \"");
1153 fprintf_symbol_filtered (gdb_stdout
, exp
,
1154 current_language
->la_language
, DMGL_ANSI
);
1155 printf_filtered ("\" is at ");
1156 print_address_numeric (load_addr
, 1, gdb_stdout
);
1157 printf_filtered (" in a file compiled without debugging");
1158 section
= SYMBOL_BFD_SECTION (msymbol
);
1159 if (section_is_overlay (section
))
1161 load_addr
= overlay_unmapped_address (load_addr
, section
);
1162 printf_filtered (",\n -- loaded at ");
1163 print_address_numeric (load_addr
, 1, gdb_stdout
);
1164 printf_filtered (" in overlay section %s", section
->name
);
1166 printf_filtered (".\n");
1169 error ("No symbol \"%s\" in current context.", exp
);
1173 printf_filtered ("Symbol \"");
1174 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_NAME (sym
),
1175 current_language
->la_language
, DMGL_ANSI
);
1176 printf_filtered ("\" is ");
1177 val
= SYMBOL_VALUE (sym
);
1178 basereg
= SYMBOL_BASEREG (sym
);
1179 section
= SYMBOL_BFD_SECTION (sym
);
1181 switch (SYMBOL_CLASS (sym
))
1184 case LOC_CONST_BYTES
:
1185 printf_filtered ("constant");
1189 printf_filtered ("a label at address ");
1190 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1192 if (section_is_overlay (section
))
1194 load_addr
= overlay_unmapped_address (load_addr
, section
);
1195 printf_filtered (",\n -- loaded at ");
1196 print_address_numeric (load_addr
, 1, gdb_stdout
);
1197 printf_filtered (" in overlay section %s", section
->name
);
1202 printf_filtered ("a variable in register %s", REGISTER_NAME (val
));
1206 printf_filtered ("static storage at address ");
1207 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1209 if (section_is_overlay (section
))
1211 load_addr
= overlay_unmapped_address (load_addr
, section
);
1212 printf_filtered (",\n -- loaded at ");
1213 print_address_numeric (load_addr
, 1, gdb_stdout
);
1214 printf_filtered (" in overlay section %s", section
->name
);
1219 printf_filtered ("external global (indirect addressing), at address *(");
1220 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1222 printf_filtered (")");
1223 if (section_is_overlay (section
))
1225 load_addr
= overlay_unmapped_address (load_addr
, section
);
1226 printf_filtered (",\n -- loaded at ");
1227 print_address_numeric (load_addr
, 1, gdb_stdout
);
1228 printf_filtered (" in overlay section %s", section
->name
);
1233 printf_filtered ("an argument in register %s", REGISTER_NAME (val
));
1236 case LOC_REGPARM_ADDR
:
1237 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val
));
1241 printf_filtered ("an argument at offset %ld", val
);
1245 printf_filtered ("an argument at frame offset %ld", val
);
1249 printf_filtered ("a local variable at frame offset %ld", val
);
1253 printf_filtered ("a reference argument at offset %ld", val
);
1257 printf_filtered ("a variable at offset %ld from register %s",
1258 val
, REGISTER_NAME (basereg
));
1261 case LOC_BASEREG_ARG
:
1262 printf_filtered ("an argument at offset %ld from register %s",
1263 val
, REGISTER_NAME (basereg
));
1267 printf_filtered ("a typedef");
1271 printf_filtered ("a function at address ");
1272 #ifdef GDB_TARGET_MASK_DISAS_PC
1273 print_address_numeric
1274 (load_addr
= GDB_TARGET_MASK_DISAS_PC (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
))),
1277 print_address_numeric (load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
1280 if (section_is_overlay (section
))
1282 load_addr
= overlay_unmapped_address (load_addr
, section
);
1283 printf_filtered (",\n -- loaded at ");
1284 print_address_numeric (load_addr
, 1, gdb_stdout
);
1285 printf_filtered (" in overlay section %s", section
->name
);
1289 case LOC_UNRESOLVED
:
1291 struct minimal_symbol
*msym
;
1293 msym
= lookup_minimal_symbol (SYMBOL_NAME (sym
), NULL
, NULL
);
1295 printf_filtered ("unresolved");
1298 section
= SYMBOL_BFD_SECTION (msym
);
1299 printf_filtered ("static storage at address ");
1300 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (msym
),
1302 if (section_is_overlay (section
))
1304 load_addr
= overlay_unmapped_address (load_addr
, section
);
1305 printf_filtered (",\n -- loaded at ");
1306 print_address_numeric (load_addr
, 1, gdb_stdout
);
1307 printf_filtered (" in overlay section %s", section
->name
);
1313 case LOC_THREAD_LOCAL_STATIC
:
1315 "a thread-local variable at offset %ld from the thread base register %s",
1316 val
, REGISTER_NAME (basereg
));
1319 case LOC_OPTIMIZED_OUT
:
1320 printf_filtered ("optimized out");
1324 printf_filtered ("of unknown (botched) type");
1327 printf_filtered (".\n");
1331 x_command (exp
, from_tty
)
1335 struct expression
*expr
;
1336 struct format_data fmt
;
1337 struct cleanup
*old_chain
;
1340 fmt
.format
= last_format
;
1341 fmt
.size
= last_size
;
1344 if (exp
&& *exp
== '/')
1347 fmt
= decode_format (&exp
, last_format
, last_size
);
1350 /* If we have an expression, evaluate it and use it as the address. */
1352 if (exp
!= 0 && *exp
!= 0)
1354 expr
= parse_expression (exp
);
1355 /* Cause expression not to be there any more
1356 if this command is repeated with Newline.
1357 But don't clobber a user-defined command's definition. */
1360 old_chain
= make_cleanup ((make_cleanup_func
) free_current_contents
,
1362 val
= evaluate_expression (expr
);
1363 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1364 val
= value_ind (val
);
1365 /* In rvalue contexts, such as this, functions are coerced into
1366 pointers to functions. This makes "x/i main" work. */
1367 if ( /* last_format == 'i'
1368 && */ TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1369 && VALUE_LVAL (val
) == lval_memory
)
1370 next_address
= VALUE_ADDRESS (val
);
1372 next_address
= value_as_pointer (val
);
1373 if (VALUE_BFD_SECTION (val
))
1374 next_section
= VALUE_BFD_SECTION (val
);
1375 do_cleanups (old_chain
);
1378 do_examine (fmt
, next_address
, next_section
);
1380 /* If the examine succeeds, we remember its size and format for next time. */
1381 last_size
= fmt
.size
;
1382 last_format
= fmt
.format
;
1384 /* Set a couple of internal variables if appropriate. */
1385 if (last_examine_value
)
1387 /* Make last address examined available to the user as $_. Use
1388 the correct pointer type. */
1389 set_internalvar (lookup_internalvar ("_"),
1390 value_from_longest (
1391 lookup_pointer_type (VALUE_TYPE (last_examine_value
)),
1392 (LONGEST
) last_examine_address
));
1394 /* Make contents of last address examined available to the user as $__. */
1395 /* If the last value has not been fetched from memory then don't
1396 fetch it now - instead mark it by voiding the $__ variable. */
1397 if (VALUE_LAZY (last_examine_value
))
1398 set_internalvar (lookup_internalvar ("__"),
1399 allocate_value (builtin_type_void
));
1401 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1406 /* Add an expression to the auto-display chain.
1407 Specify the expression. */
1410 display_command (exp
, from_tty
)
1414 struct format_data fmt
;
1415 register struct expression
*expr
;
1416 register struct display
*new;
1420 if (tui_version
&& *exp
== '$')
1421 display_it
= ((TuiStatus
) tuiDo (
1422 (TuiOpaqueFuncPtr
) tui_vSetLayoutTo
, exp
) == TUI_FAILURE
);
1436 fmt
= decode_format (&exp
, 0, 0);
1437 if (fmt
.size
&& fmt
.format
== 0)
1439 if (fmt
.format
== 'i' || fmt
.format
== 's')
1449 innermost_block
= 0;
1450 expr
= parse_expression (exp
);
1452 new = (struct display
*) xmalloc (sizeof (struct display
));
1455 new->block
= innermost_block
;
1456 new->next
= display_chain
;
1457 new->number
= ++display_number
;
1459 new->status
= enabled
;
1460 display_chain
= new;
1462 if (from_tty
&& target_has_execution
)
1463 do_one_display (new);
1473 free ((PTR
) d
->exp
);
1477 /* Clear out the display_chain.
1478 Done when new symtabs are loaded, since this invalidates
1479 the types stored in many expressions. */
1484 register struct display
*d
;
1486 while ((d
= display_chain
) != NULL
)
1488 free ((PTR
) d
->exp
);
1489 display_chain
= d
->next
;
1494 /* Delete the auto-display number NUM. */
1497 delete_display (num
)
1500 register struct display
*d1
, *d
;
1503 error ("No display number %d.", num
);
1505 if (display_chain
->number
== num
)
1508 display_chain
= d1
->next
;
1512 for (d
= display_chain
;; d
= d
->next
)
1515 error ("No display number %d.", num
);
1516 if (d
->next
->number
== num
)
1526 /* Delete some values from the auto-display chain.
1527 Specify the element numbers. */
1530 undisplay_command (args
, from_tty
)
1534 register char *p
= args
;
1540 if (query ("Delete all auto-display expressions? "))
1549 while (*p1
>= '0' && *p1
<= '9')
1551 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1552 error ("Arguments must be display numbers.");
1556 delete_display (num
);
1559 while (*p
== ' ' || *p
== '\t')
1565 /* Display a single auto-display.
1566 Do nothing if the display cannot be printed in the current context,
1567 or if the display is disabled. */
1573 int within_current_scope
;
1575 if (d
->status
== disabled
)
1579 within_current_scope
= contained_in (get_selected_block (), d
->block
);
1581 within_current_scope
= 1;
1582 if (!within_current_scope
)
1585 current_display_number
= d
->number
;
1587 annotate_display_begin ();
1588 printf_filtered ("%d", d
->number
);
1589 annotate_display_number_end ();
1590 printf_filtered (": ");
1596 annotate_display_format ();
1598 printf_filtered ("x/");
1599 if (d
->format
.count
!= 1)
1600 printf_filtered ("%d", d
->format
.count
);
1601 printf_filtered ("%c", d
->format
.format
);
1602 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1603 printf_filtered ("%c", d
->format
.size
);
1604 printf_filtered (" ");
1606 annotate_display_expression ();
1608 print_expression (d
->exp
, gdb_stdout
);
1609 annotate_display_expression_end ();
1611 if (d
->format
.count
!= 1)
1612 printf_filtered ("\n");
1614 printf_filtered (" ");
1616 val
= evaluate_expression (d
->exp
);
1617 addr
= value_as_pointer (val
);
1618 if (d
->format
.format
== 'i')
1619 addr
= ADDR_BITS_REMOVE (addr
);
1621 annotate_display_value ();
1623 do_examine (d
->format
, addr
, VALUE_BFD_SECTION (val
));
1627 annotate_display_format ();
1629 if (d
->format
.format
)
1630 printf_filtered ("/%c ", d
->format
.format
);
1632 annotate_display_expression ();
1634 print_expression (d
->exp
, gdb_stdout
);
1635 annotate_display_expression_end ();
1637 printf_filtered (" = ");
1639 annotate_display_expression ();
1641 print_formatted (evaluate_expression (d
->exp
),
1642 d
->format
.format
, d
->format
.size
, gdb_stdout
);
1643 printf_filtered ("\n");
1646 annotate_display_end ();
1648 gdb_flush (gdb_stdout
);
1649 current_display_number
= -1;
1652 /* Display all of the values on the auto-display chain which can be
1653 evaluated in the current scope. */
1658 register struct display
*d
;
1660 for (d
= display_chain
; d
; d
= d
->next
)
1664 /* Delete the auto-display which we were in the process of displaying.
1665 This is done when there is an error or a signal. */
1668 disable_display (num
)
1671 register struct display
*d
;
1673 for (d
= display_chain
; d
; d
= d
->next
)
1674 if (d
->number
== num
)
1676 d
->status
= disabled
;
1679 printf_unfiltered ("No display number %d.\n", num
);
1683 disable_current_display ()
1685 if (current_display_number
>= 0)
1687 disable_display (current_display_number
);
1688 fprintf_unfiltered (gdb_stderr
, "Disabling display %d to avoid infinite recursion.\n",
1689 current_display_number
);
1691 current_display_number
= -1;
1695 display_info (ignore
, from_tty
)
1699 register struct display
*d
;
1702 printf_unfiltered ("There are no auto-display expressions now.\n");
1704 printf_filtered ("Auto-display expressions now in effect:\n\
1705 Num Enb Expression\n");
1707 for (d
= display_chain
; d
; d
= d
->next
)
1709 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->status
]);
1711 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1713 else if (d
->format
.format
)
1714 printf_filtered ("/%c ", d
->format
.format
);
1715 print_expression (d
->exp
, gdb_stdout
);
1716 if (d
->block
&& !contained_in (get_selected_block (), d
->block
))
1717 printf_filtered (" (cannot be evaluated in the current context)");
1718 printf_filtered ("\n");
1719 gdb_flush (gdb_stdout
);
1724 enable_display (args
, from_tty
)
1728 register char *p
= args
;
1731 register struct display
*d
;
1735 for (d
= display_chain
; d
; d
= d
->next
)
1736 d
->status
= enabled
;
1742 while (*p1
>= '0' && *p1
<= '9')
1744 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1745 error ("Arguments must be display numbers.");
1749 for (d
= display_chain
; d
; d
= d
->next
)
1750 if (d
->number
== num
)
1752 d
->status
= enabled
;
1755 printf_unfiltered ("No display number %d.\n", num
);
1758 while (*p
== ' ' || *p
== '\t')
1765 disable_display_command (args
, from_tty
)
1769 register char *p
= args
;
1771 register struct display
*d
;
1775 for (d
= display_chain
; d
; d
= d
->next
)
1776 d
->status
= disabled
;
1782 while (*p1
>= '0' && *p1
<= '9')
1784 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1785 error ("Arguments must be display numbers.");
1787 disable_display (atoi (p
));
1790 while (*p
== ' ' || *p
== '\t')
1796 /* Print the value in stack frame FRAME of a variable
1797 specified by a struct symbol. */
1800 print_variable_value (var
, frame
, stream
)
1802 struct frame_info
*frame
;
1803 struct ui_file
*stream
;
1805 value_ptr val
= read_var_value (var
, frame
);
1807 value_print (val
, stream
, 0, Val_pretty_default
);
1810 /* Print the arguments of a stack frame, given the function FUNC
1811 running in that frame (as a symbol), the info on the frame,
1812 and the number of args according to the stack frame (or -1 if unknown). */
1814 /* References here and elsewhere to "number of args according to the
1815 stack frame" appear in all cases to refer to "number of ints of args
1816 according to the stack frame". At least for VAX, i386, isi. */
1819 print_frame_args (func
, fi
, num
, stream
)
1820 struct symbol
*func
;
1821 struct frame_info
*fi
;
1823 struct ui_file
*stream
;
1825 struct block
*b
= NULL
;
1829 register struct symbol
*sym
;
1830 register value_ptr val
;
1831 /* Offset of next stack argument beyond the one we have seen that is
1832 at the highest offset.
1833 -1 if we haven't come to a stack argument yet. */
1834 long highest_offset
= -1;
1836 /* Number of ints of arguments that we have printed so far. */
1837 int args_printed
= 0;
1839 struct cleanup
*old_chain
;
1840 struct ui_stream
*stb
;
1842 stb
= ui_out_stream_new (uiout
);
1843 old_chain
= make_cleanup ((make_cleanup_func
) ui_out_stream_delete
, stb
);
1848 b
= SYMBOL_BLOCK_VALUE (func
);
1849 nsyms
= BLOCK_NSYMS (b
);
1852 for (i
= 0; i
< nsyms
; i
++)
1855 sym
= BLOCK_SYM (b
, i
);
1857 /* Keep track of the highest stack argument offset seen, and
1858 skip over any kinds of symbols we don't care about. */
1860 switch (SYMBOL_CLASS (sym
))
1865 long current_offset
= SYMBOL_VALUE (sym
);
1866 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1868 /* Compute address of next argument by adding the size of
1869 this argument and rounding to an int boundary. */
1871 = ((current_offset
+ arg_size
+ sizeof (int) - 1)
1872 & ~(sizeof (int) - 1));
1874 /* If this is the highest offset seen yet, set highest_offset. */
1875 if (highest_offset
== -1
1876 || (current_offset
> highest_offset
))
1877 highest_offset
= current_offset
;
1879 /* Add the number of ints we're about to print to args_printed. */
1880 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1883 /* We care about types of symbols, but don't need to keep track of
1884 stack offsets in them. */
1886 case LOC_REGPARM_ADDR
:
1888 case LOC_BASEREG_ARG
:
1891 /* Other types of symbols we just skip over. */
1896 /* We have to look up the symbol because arguments can have
1897 two entries (one a parameter, one a local) and the one we
1898 want is the local, which lookup_symbol will find for us.
1899 This includes gcc1 (not gcc2) on the sparc when passing a
1900 small structure and gcc2 when the argument type is float
1901 and it is passed as a double and converted to float by
1902 the prologue (in the latter case the type of the LOC_ARG
1903 symbol is double and the type of the LOC_LOCAL symbol is
1905 /* But if the parameter name is null, don't try it.
1906 Null parameter names occur on the RS/6000, for traceback tables.
1907 FIXME, should we even print them? */
1909 if (*SYMBOL_NAME (sym
))
1911 struct symbol
*nsym
;
1912 nsym
= lookup_symbol
1914 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1915 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
1917 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
1918 it was passed on the stack and loaded into a register,
1919 or passed in a register and stored in a stack slot.
1920 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
1922 Reasons for using the LOC_ARG:
1923 (1) because find_saved_registers may be slow for remote
1925 (2) because registers are often re-used and stack slots
1926 rarely (never?) are. Therefore using the stack slot is
1927 much less likely to print garbage.
1929 Reasons why we might want to use the LOC_REGISTER:
1930 (1) So that the backtrace prints the same value as
1931 "print foo". I see no compelling reason why this needs
1932 to be the case; having the backtrace print the value which
1933 was passed in, and "print foo" print the value as modified
1934 within the called function, makes perfect sense to me.
1936 Additional note: It might be nice if "info args" displayed
1938 One more note: There is a case with sparc structure passing
1939 where we need to use the LOC_REGISTER, but this is dealt with
1940 by creating a single LOC_REGPARM in symbol reading. */
1942 /* Leave sym (the LOC_ARG) alone. */
1950 /* Print the current arg. */
1952 ui_out_text (uiout
, ", ");
1953 ui_out_wrap_hint (uiout
, " ");
1955 annotate_arg_begin ();
1957 ui_out_list_begin (uiout
, NULL
);
1958 fprintf_symbol_filtered (stb
->stream
, SYMBOL_SOURCE_NAME (sym
),
1959 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1960 ui_out_field_stream (uiout
, "name", stb
);
1961 annotate_arg_name_end ();
1962 ui_out_text (uiout
, "=");
1964 /* Print the current arg. */
1966 fprintf_filtered (stream
, ", ");
1969 annotate_arg_begin ();
1971 fprintf_symbol_filtered (stream
, SYMBOL_SOURCE_NAME (sym
),
1972 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1973 annotate_arg_name_end ();
1974 fputs_filtered ("=", stream
);
1977 /* Avoid value_print because it will deref ref parameters. We just
1978 want to print their addresses. Print ??? for args whose address
1979 we do not know. We pass 2 as "recurse" to val_print because our
1980 standard indentation here is 4 spaces, and val_print indents
1981 2 for each recurse. */
1982 val
= read_var_value (sym
, fi
);
1984 annotate_arg_value (val
== NULL
? NULL
: VALUE_TYPE (val
));
1988 if (GDB_TARGET_IS_D10V
1989 && SYMBOL_CLASS (sym
) == LOC_REGPARM
&& TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_PTR
)
1990 TYPE_LENGTH (VALUE_TYPE (val
)) = 2;
1992 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
1993 VALUE_ADDRESS (val
),
1994 stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
1995 ui_out_field_stream (uiout
, "value", stb
);
1998 ui_out_text (uiout
, "???");
2000 ui_out_list_end (uiout
);
2002 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
2003 VALUE_ADDRESS (val
),
2004 stream
, 0, 0, 2, Val_no_prettyprint
);
2007 fputs_filtered ("???", stream
);
2010 annotate_arg_end ();
2015 /* Don't print nameless args in situations where we don't know
2016 enough about the stack to find them. */
2021 if (highest_offset
== -1)
2022 start
= FRAME_ARGS_SKIP
;
2024 start
= highest_offset
;
2026 print_frame_nameless_args (fi
, start
, num
- args_printed
,
2030 do_cleanups (old_chain
);
2031 #endif /* no UI_OUT */
2034 /* Print nameless args on STREAM.
2035 FI is the frameinfo for this frame, START is the offset
2036 of the first nameless arg, and NUM is the number of nameless args to
2037 print. FIRST is nonzero if this is the first argument (not just
2038 the first nameless arg). */
2041 print_frame_nameless_args (fi
, start
, num
, first
, stream
)
2042 struct frame_info
*fi
;
2046 struct ui_file
*stream
;
2052 for (i
= 0; i
< num
; i
++)
2055 #ifdef NAMELESS_ARG_VALUE
2056 NAMELESS_ARG_VALUE (fi
, start
, &arg_value
);
2058 argsaddr
= FRAME_ARGS_ADDRESS (fi
);
2062 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
2066 fprintf_filtered (stream
, ", ");
2068 #ifdef PRINT_NAMELESS_INTEGER
2069 PRINT_NAMELESS_INTEGER (stream
, arg_value
);
2071 #ifdef PRINT_TYPELESS_INTEGER
2072 PRINT_TYPELESS_INTEGER (stream
, builtin_type_int
, (LONGEST
) arg_value
);
2074 fprintf_filtered (stream
, "%ld", arg_value
);
2075 #endif /* PRINT_TYPELESS_INTEGER */
2076 #endif /* PRINT_NAMELESS_INTEGER */
2078 start
+= sizeof (int);
2084 printf_command (arg
, from_tty
)
2088 register char *f
= NULL
;
2089 register char *s
= arg
;
2090 char *string
= NULL
;
2091 value_ptr
*val_args
;
2093 char *current_substring
;
2095 int allocated_args
= 20;
2096 struct cleanup
*old_cleanups
;
2098 val_args
= (value_ptr
*) xmalloc (allocated_args
* sizeof (value_ptr
));
2099 old_cleanups
= make_cleanup ((make_cleanup_func
) free_current_contents
,
2103 error_no_arg ("format-control string and values to print");
2105 /* Skip white space before format string */
2106 while (*s
== ' ' || *s
== '\t')
2109 /* A format string should follow, enveloped in double quotes */
2111 error ("Bad format string, missing '\"'.");
2113 /* Parse the format-control string and copy it into the string STRING,
2114 processing some kinds of escape sequence. */
2116 f
= string
= (char *) alloca (strlen (s
) + 1);
2124 error ("Bad format string, non-terminated '\"'.");
2136 *f
++ = '\007'; /* Bell */
2161 /* ??? TODO: handle other escape sequences */
2162 error ("Unrecognized escape character \\%c in format string.",
2172 /* Skip over " and following space and comma. */
2175 while (*s
== ' ' || *s
== '\t')
2178 if (*s
!= ',' && *s
!= 0)
2179 error ("Invalid argument syntax");
2183 while (*s
== ' ' || *s
== '\t')
2186 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2187 substrings
= alloca (strlen (string
) * 2);
2188 current_substring
= substrings
;
2191 /* Now scan the string for %-specs and see what kinds of args they want.
2192 argclass[I] classifies the %-specs so we can give printf_filtered
2193 something of the right size. */
2197 no_arg
, int_arg
, string_arg
, double_arg
, long_long_arg
2199 enum argclass
*argclass
;
2200 enum argclass this_argclass
;
2206 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2214 while (strchr ("0123456789.hlL-+ #", *f
))
2216 if (*f
== 'l' || *f
== 'L')
2223 this_argclass
= string_arg
;
2229 this_argclass
= double_arg
;
2233 error ("`*' not supported for precision or width in printf");
2236 error ("Format specifier `n' not supported in printf");
2239 this_argclass
= no_arg
;
2244 this_argclass
= long_long_arg
;
2246 this_argclass
= int_arg
;
2250 if (this_argclass
!= no_arg
)
2252 strncpy (current_substring
, last_arg
, f
- last_arg
);
2253 current_substring
+= f
- last_arg
;
2254 *current_substring
++ = '\0';
2256 argclass
[nargs_wanted
++] = this_argclass
;
2260 /* Now, parse all arguments and evaluate them.
2261 Store the VALUEs in VAL_ARGS. */
2266 if (nargs
== allocated_args
)
2267 val_args
= (value_ptr
*) xrealloc ((char *) val_args
,
2268 (allocated_args
*= 2)
2269 * sizeof (value_ptr
));
2271 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2273 /* If format string wants a float, unchecked-convert the value to
2274 floating point of the same size */
2276 if (argclass
[nargs
] == double_arg
)
2278 struct type
*type
= VALUE_TYPE (val_args
[nargs
]);
2279 if (TYPE_LENGTH (type
) == sizeof (float))
2280 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
2281 if (TYPE_LENGTH (type
) == sizeof (double))
2282 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
2290 if (nargs
!= nargs_wanted
)
2291 error ("Wrong number of arguments for specified format-string");
2293 /* Now actually print them. */
2294 current_substring
= substrings
;
2295 for (i
= 0; i
< nargs
; i
++)
2297 switch (argclass
[i
])
2304 tem
= value_as_pointer (val_args
[i
]);
2306 /* This is a %s argument. Find the length of the string. */
2311 read_memory_section (tem
+ j
, &c
, 1,
2312 VALUE_BFD_SECTION (val_args
[i
]));
2317 /* Copy the string contents into a string inside GDB. */
2318 str
= (char *) alloca (j
+ 1);
2319 read_memory_section (tem
, str
, j
, VALUE_BFD_SECTION (val_args
[i
]));
2322 printf_filtered (current_substring
, str
);
2327 double val
= value_as_double (val_args
[i
]);
2328 printf_filtered (current_substring
, val
);
2332 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2334 long long val
= value_as_long (val_args
[i
]);
2335 printf_filtered (current_substring
, val
);
2339 error ("long long not supported in printf");
2343 /* FIXME: there should be separate int_arg and long_arg. */
2344 long val
= value_as_long (val_args
[i
]);
2345 printf_filtered (current_substring
, val
);
2348 default: /* purecov: deadcode */
2349 error ("internal error in printf_command"); /* purecov: deadcode */
2351 /* Skip to the next substring. */
2352 current_substring
+= strlen (current_substring
) + 1;
2354 /* Print the portion of the format string after the last argument. */
2355 printf_filtered (last_arg
);
2357 do_cleanups (old_cleanups
);
2360 /* Dump a specified section of assembly code. With no command line
2361 arguments, this command will dump the assembly code for the
2362 function surrounding the pc value in the selected frame. With one
2363 argument, it will dump the assembly code surrounding that pc value.
2364 Two arguments are interpeted as bounds within which to dump
2369 disassemble_command (arg
, from_tty
)
2373 CORE_ADDR low
, high
;
2375 CORE_ADDR pc
, pc_masked
;
2384 if (!selected_frame
)
2385 error ("No frame selected.\n");
2387 pc
= get_frame_pc (selected_frame
);
2388 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2389 error ("No function contains program counter for selected frame.\n");
2391 else if (tui_version
)
2392 low
= (CORE_ADDR
) tuiDo ((TuiOpaqueFuncPtr
) tui_vGetLowDisassemblyAddress
,
2396 low
+= FUNCTION_START_OFFSET
;
2398 else if (!(space_index
= (char *) strchr (arg
, ' ')))
2401 pc
= parse_and_eval_address (arg
);
2402 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2403 error ("No function contains specified address.\n");
2405 else if (tui_version
)
2406 low
= (CORE_ADDR
) tuiDo ((TuiOpaqueFuncPtr
) tui_vGetLowDisassemblyAddress
,
2411 if (overlay_debugging
)
2413 section
= find_pc_overlay (pc
);
2414 if (pc_in_unmapped_range (pc
, section
))
2416 /* find_pc_partial_function will have returned low and high
2417 relative to the symbolic (mapped) address range. Need to
2418 translate them back to the unmapped range where PC is. */
2419 low
= overlay_unmapped_address (low
, section
);
2420 high
= overlay_unmapped_address (high
, section
);
2424 low
+= FUNCTION_START_OFFSET
;
2428 /* Two arguments. */
2429 *space_index
= '\0';
2430 low
= parse_and_eval_address (arg
);
2431 high
= parse_and_eval_address (space_index
+ 1);
2436 m_winPtrIsNull (disassemWin
) || !disassemWin
->generic
.isVisible
)
2439 printf_filtered ("Dump of assembler code ");
2442 printf_filtered ("for function %s:\n", name
);
2446 printf_filtered ("from ");
2447 print_address_numeric (low
, 1, gdb_stdout
);
2448 printf_filtered (" to ");
2449 print_address_numeric (high
, 1, gdb_stdout
);
2450 printf_filtered (":\n");
2453 /* Dump the specified range. */
2456 #ifdef GDB_TARGET_MASK_DISAS_PC
2457 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2462 while (pc_masked
< high
)
2465 print_address (pc_masked
, gdb_stdout
);
2466 printf_filtered (":\t");
2467 /* We often wrap here if there are long symbolic names. */
2469 pc
+= print_insn (pc
, gdb_stdout
);
2470 printf_filtered ("\n");
2472 #ifdef GDB_TARGET_MASK_DISAS_PC
2473 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2478 printf_filtered ("End of assembler dump.\n");
2479 gdb_flush (gdb_stdout
);
2484 tuiDo ((TuiOpaqueFuncPtr
) tui_vAddWinToLayout
, DISASSEM_WIN
);
2485 tuiDo ((TuiOpaqueFuncPtr
) tui_vUpdateSourceWindowsWithAddr
, low
);
2490 /* Print the instruction at address MEMADDR in debugged memory,
2491 on STREAM. Returns length of the instruction, in bytes. */
2494 print_insn (memaddr
, stream
)
2496 struct ui_file
*stream
;
2498 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
2499 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_BIG
;
2501 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_LITTLE
;
2503 if (TARGET_ARCHITECTURE
!= NULL
)
2504 TARGET_PRINT_INSN_INFO
->mach
= TARGET_ARCHITECTURE
->mach
;
2505 /* else: should set .mach=0 but some disassemblers don't grok this */
2507 return TARGET_PRINT_INSN (memaddr
, TARGET_PRINT_INSN_INFO
);
2512 _initialize_printcmd ()
2514 current_display_number
= -1;
2516 add_info ("address", address_info
,
2517 "Describe where symbol SYM is stored.");
2519 add_info ("symbol", sym_info
,
2520 "Describe what symbol is at location ADDR.\n\
2521 Only for symbols with fixed locations (global or static scope).");
2523 add_com ("x", class_vars
, x_command
,
2524 concat ("Examine memory: x/FMT ADDRESS.\n\
2525 ADDRESS is an expression for the memory address to examine.\n\
2526 FMT is a repeat count followed by a format letter and a size letter.\n\
2527 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2528 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2529 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2530 The specified number of objects of the specified size are printed\n\
2531 according to the format.\n\n\
2532 Defaults for format and size letters are those previously used.\n\
2533 Default count is 1. Default address is following last thing printed\n\
2534 with this command or \"print\".", NULL
));
2536 add_com ("disassemble", class_vars
, disassemble_command
,
2537 "Disassemble a specified section of memory.\n\
2538 Default is the function surrounding the pc of the selected frame.\n\
2539 With a single argument, the function surrounding that address is dumped.\n\
2540 Two arguments are taken as a range of memory to dump.");
2542 add_com_alias ("va", "disassemble", class_xdb
, 0);
2545 add_com ("whereis", class_vars
, whereis_command
,
2546 "Print line number and file of definition of variable.");
2549 add_info ("display", display_info
,
2550 "Expressions to display when program stops, with code numbers.");
2552 add_cmd ("undisplay", class_vars
, undisplay_command
,
2553 "Cancel some expressions to be displayed when program stops.\n\
2554 Arguments are the code numbers of the expressions to stop displaying.\n\
2555 No argument means cancel all automatic-display expressions.\n\
2556 \"delete display\" has the same effect as this command.\n\
2557 Do \"info display\" to see current list of code numbers.",
2560 add_com ("display", class_vars
, display_command
,
2561 "Print value of expression EXP each time the program stops.\n\
2562 /FMT may be used before EXP as in the \"print\" command.\n\
2563 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2564 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2565 and examining is done as in the \"x\" command.\n\n\
2566 With no argument, display all currently requested auto-display expressions.\n\
2567 Use \"undisplay\" to cancel display requests previously made."
2570 add_cmd ("display", class_vars
, enable_display
,
2571 "Enable some expressions to be displayed when program stops.\n\
2572 Arguments are the code numbers of the expressions to resume displaying.\n\
2573 No argument means enable all automatic-display expressions.\n\
2574 Do \"info display\" to see current list of code numbers.", &enablelist
);
2576 add_cmd ("display", class_vars
, disable_display_command
,
2577 "Disable some expressions to be displayed when program stops.\n\
2578 Arguments are the code numbers of the expressions to stop displaying.\n\
2579 No argument means disable all automatic-display expressions.\n\
2580 Do \"info display\" to see current list of code numbers.", &disablelist
);
2582 add_cmd ("display", class_vars
, undisplay_command
,
2583 "Cancel some expressions to be displayed when program stops.\n\
2584 Arguments are the code numbers of the expressions to stop displaying.\n\
2585 No argument means cancel all automatic-display expressions.\n\
2586 Do \"info display\" to see current list of code numbers.", &deletelist
);
2588 add_com ("printf", class_vars
, printf_command
,
2589 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2590 This is useful for formatted output in user-defined commands.");
2592 add_com ("output", class_vars
, output_command
,
2593 "Like \"print\" but don't put in value history and don't print newline.\n\
2594 This is useful in user-defined commands.");
2596 add_prefix_cmd ("set", class_vars
, set_command
,
2597 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2598 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2599 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2600 with $), a register (a few standard names starting with $), or an actual\n\
2601 variable in the program being debugged. EXP is any valid expression.\n",
2602 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2603 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2604 You can see these environment settings with the \"show\" command.", NULL
),
2605 &setlist
, "set ", 1, &cmdlist
);
2607 add_com ("assign", class_vars
, set_command
, concat ("Evaluate expression \
2608 EXP and assign result to variable VAR, using assignment\n\
2609 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2610 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2611 with $), a register (a few standard names starting with $), or an actual\n\
2612 variable in the program being debugged. EXP is any valid expression.\n",
2613 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2614 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2615 You can see these environment settings with the \"show\" command.", NULL
));
2617 /* "call" is the same as "set", but handy for dbx users to call fns. */
2618 add_com ("call", class_vars
, call_command
,
2619 "Call a function in the program.\n\
2620 The argument is the function name and arguments, in the notation of the\n\
2621 current working language. The result is printed and saved in the value\n\
2622 history, if it is not void.");
2624 add_cmd ("variable", class_vars
, set_command
,
2625 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2626 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2627 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2628 with $), a register (a few standard names starting with $), or an actual\n\
2629 variable in the program being debugged. EXP is any valid expression.\n\
2630 This may usually be abbreviated to simply \"set\".",
2633 add_com ("print", class_vars
, print_command
,
2634 concat ("Print value of expression EXP.\n\
2635 Variables accessible are those of the lexical environment of the selected\n\
2636 stack frame, plus all those whose scope is global or an entire file.\n\
2638 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2639 $$NUM refers to NUM'th value back from the last one.\n\
2640 Names starting with $ refer to registers (with the values they would have\n",
2641 "if the program were to return to the stack frame now selected, restoring\n\
2642 all registers saved by frames farther in) or else to debugger\n\
2643 \"convenience\" variables (any such name not a known register).\n\
2644 Use assignment expressions to give values to convenience variables.\n",
2646 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2647 @ is a binary operator for treating consecutive data objects\n\
2648 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2649 element is FOO, whose second element is stored in the space following\n\
2650 where FOO is stored, etc. FOO must be an expression whose value\n\
2651 resides in memory.\n",
2653 EXP may be preceded with /FMT, where FMT is a format letter\n\
2654 but no count or size letter (see \"x\" command).", NULL
));
2655 add_com_alias ("p", "print", class_vars
, 1);
2657 add_com ("inspect", class_vars
, inspect_command
,
2658 "Same as \"print\" command, except that if you are running in the epoch\n\
2659 environment, the value is printed in its own window.");
2662 add_set_cmd ("max-symbolic-offset", no_class
, var_uinteger
,
2663 (char *) &max_symbolic_offset
,
2664 "Set the largest offset that will be printed in <symbol+1234> form.",
2668 add_set_cmd ("symbol-filename", no_class
, var_boolean
,
2669 (char *) &print_symbol_filename
,
2670 "Set printing of source filename and line number with <symbol>.",
2674 /* For examine/instruction a single byte quantity is specified as
2675 the data. This avoids problems with value_at_lazy() requiring a
2676 valid data type (and rejecting VOID). */
2677 examine_i_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_i_type", NULL
);
2679 examine_b_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_b_type", NULL
);
2680 examine_h_type
= init_type (TYPE_CODE_INT
, 2, 0, "examine_h_type", NULL
);
2681 examine_w_type
= init_type (TYPE_CODE_INT
, 4, 0, "examine_w_type", NULL
);
2682 examine_g_type
= init_type (TYPE_CODE_INT
, 8, 0, "examine_g_type", NULL
);