1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
29 #include "expression.h"
33 #include "breakpoint.h"
37 #include "symfile.h" /* for overlay functions */
38 #include "objfiles.h" /* ditto */
39 #include "completer.h" /* for completion functions */
41 #include "gdb_assert.h"
46 #include "exceptions.h"
50 #include "parser-defs.h"
54 #include "tui/tui.h" /* For tui_active et.al. */
57 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG)
58 # define USE_PRINTF_I64 1
59 # define PRINTF_HAS_LONG_LONG
61 # define USE_PRINTF_I64 0
64 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
72 /* True if the value should be printed raw -- that is, bypassing
73 python-based formatters. */
77 /* Last specified output format. */
79 static char last_format
= 0;
81 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
83 static char last_size
= 'w';
85 /* Default address to examine next, and associated architecture. */
87 static struct gdbarch
*next_gdbarch
;
88 static CORE_ADDR next_address
;
90 /* Number of delay instructions following current disassembled insn. */
92 static int branch_delay_insns
;
94 /* Last address examined. */
96 static CORE_ADDR last_examine_address
;
98 /* Contents of last address examined.
99 This is not valid past the end of the `x' command! */
101 static struct value
*last_examine_value
;
103 /* Largest offset between a symbolic value and an address, that will be
104 printed as `0x1234 <symbol+offset>'. */
106 static unsigned int max_symbolic_offset
= UINT_MAX
;
108 show_max_symbolic_offset (struct ui_file
*file
, int from_tty
,
109 struct cmd_list_element
*c
, const char *value
)
111 fprintf_filtered (file
, _("\
112 The largest offset that will be printed in <symbol+1234> form is %s.\n"),
116 /* Append the source filename and linenumber of the symbol when
117 printing a symbolic value as `<symbol at filename:linenum>' if set. */
118 static int print_symbol_filename
= 0;
120 show_print_symbol_filename (struct ui_file
*file
, int from_tty
,
121 struct cmd_list_element
*c
, const char *value
)
123 fprintf_filtered (file
, _("\
124 Printing of source filename and line number with <symbol> is %s.\n"),
128 /* Number of auto-display expression currently being displayed.
129 So that we can disable it if we get an error or a signal within it.
130 -1 when not doing one. */
132 int current_display_number
;
136 /* Chain link to next auto-display item. */
137 struct display
*next
;
139 /* The expression as the user typed it. */
142 /* Expression to be evaluated and displayed. */
143 struct expression
*exp
;
145 /* Item number of this auto-display item. */
148 /* Display format specified. */
149 struct format_data format
;
151 /* Program space associated with `block'. */
152 struct program_space
*pspace
;
154 /* Innermost block required by this expression when evaluated */
157 /* Status of this display (enabled or disabled) */
161 /* Chain of expressions whose values should be displayed
162 automatically each time the program stops. */
164 static struct display
*display_chain
;
166 static int display_number
;
168 /* Prototypes for exported functions. */
170 void output_command (char *, int);
172 void _initialize_printcmd (void);
174 /* Prototypes for local functions. */
176 static void do_one_display (struct display
*);
179 /* Decode a format specification. *STRING_PTR should point to it.
180 OFORMAT and OSIZE are used as defaults for the format and size
181 if none are given in the format specification.
182 If OSIZE is zero, then the size field of the returned value
183 should be set only if a size is explicitly specified by the
185 The structure returned describes all the data
186 found in the specification. In addition, *STRING_PTR is advanced
187 past the specification and past all whitespace following it. */
189 static struct format_data
190 decode_format (char **string_ptr
, int oformat
, int osize
)
192 struct format_data val
;
193 char *p
= *string_ptr
;
200 if (*p
>= '0' && *p
<= '9')
201 val
.count
= atoi (p
);
202 while (*p
>= '0' && *p
<= '9')
205 /* Now process size or format letters that follow. */
209 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
216 else if (*p
>= 'a' && *p
<= 'z')
222 while (*p
== ' ' || *p
== '\t')
226 /* Set defaults for format and size if not specified. */
227 if (val
.format
== '?')
231 /* Neither has been specified. */
232 val
.format
= oformat
;
236 /* If a size is specified, any format makes a reasonable
237 default except 'i'. */
238 val
.format
= oformat
== 'i' ? 'x' : oformat
;
240 else if (val
.size
== '?')
244 /* Pick the appropriate size for an address. This is deferred
245 until do_examine when we know the actual architecture to use.
246 A special size value of 'a' is used to indicate this case. */
247 val
.size
= osize
? 'a' : osize
;
250 /* Floating point has to be word or giantword. */
251 if (osize
== 'w' || osize
== 'g')
254 /* Default it to giantword if the last used size is not
256 val
.size
= osize
? 'g' : osize
;
259 /* Characters default to one byte. */
260 val
.size
= osize
? 'b' : osize
;
263 /* The default is the size most recently specified. */
270 /* Print value VAL on stream according to OPTIONS.
271 Do not end with a newline.
272 SIZE is the letter for the size of datum being printed.
273 This is used to pad hex numbers so they line up. SIZE is 0
274 for print / output and set for examine. */
277 print_formatted (struct value
*val
, int size
,
278 const struct value_print_options
*options
,
279 struct ui_file
*stream
)
281 struct type
*type
= check_typedef (value_type (val
));
282 int len
= TYPE_LENGTH (type
);
284 if (VALUE_LVAL (val
) == lval_memory
)
285 next_address
= value_address (val
) + len
;
289 switch (options
->format
)
293 struct type
*elttype
= value_type (val
);
294 next_address
= (value_address (val
)
295 + val_print_string (elttype
,
296 value_address (val
), -1,
302 /* We often wrap here if there are long symbolic names. */
304 next_address
= (value_address (val
)
305 + gdb_print_insn (get_type_arch (type
),
306 value_address (val
), stream
,
307 &branch_delay_insns
));
312 if (options
->format
== 0 || options
->format
== 's'
313 || TYPE_CODE (type
) == TYPE_CODE_REF
314 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
315 || TYPE_CODE (type
) == TYPE_CODE_STRING
316 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
317 || TYPE_CODE (type
) == TYPE_CODE_UNION
318 || TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
319 value_print (val
, stream
, options
);
321 /* User specified format, so don't look to the the type to
322 tell us what to do. */
323 print_scalar_formatted (value_contents (val
), type
,
324 options
, size
, stream
);
327 /* Return builtin floating point type of same length as TYPE.
328 If no such type is found, return TYPE itself. */
330 float_type_from_length (struct type
*type
)
332 struct gdbarch
*gdbarch
= get_type_arch (type
);
333 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
334 unsigned int len
= TYPE_LENGTH (type
);
336 if (len
== TYPE_LENGTH (builtin
->builtin_float
))
337 type
= builtin
->builtin_float
;
338 else if (len
== TYPE_LENGTH (builtin
->builtin_double
))
339 type
= builtin
->builtin_double
;
340 else if (len
== TYPE_LENGTH (builtin
->builtin_long_double
))
341 type
= builtin
->builtin_long_double
;
346 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
347 according to OPTIONS and SIZE on STREAM.
348 Formats s and i are not supported at this level.
350 This is how the elements of an array or structure are printed
354 print_scalar_formatted (const void *valaddr
, struct type
*type
,
355 const struct value_print_options
*options
,
356 int size
, struct ui_file
*stream
)
358 struct gdbarch
*gdbarch
= get_type_arch (type
);
359 LONGEST val_long
= 0;
360 unsigned int len
= TYPE_LENGTH (type
);
361 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
363 /* If we get here with a string format, try again without it. Go
364 all the way back to the language printers, which may call us
366 if (options
->format
== 's')
368 struct value_print_options opts
= *options
;
371 val_print (type
, valaddr
, 0, 0, stream
, 0, &opts
,
376 if (len
> sizeof(LONGEST
) &&
377 (TYPE_CODE (type
) == TYPE_CODE_INT
378 || TYPE_CODE (type
) == TYPE_CODE_ENUM
))
380 switch (options
->format
)
383 print_octal_chars (stream
, valaddr
, len
, byte_order
);
387 print_decimal_chars (stream
, valaddr
, len
, byte_order
);
390 print_binary_chars (stream
, valaddr
, len
, byte_order
);
393 print_hex_chars (stream
, valaddr
, len
, byte_order
);
396 print_char_chars (stream
, type
, valaddr
, len
, byte_order
);
403 if (options
->format
!= 'f')
404 val_long
= unpack_long (type
, valaddr
);
406 /* If the value is a pointer, and pointers and addresses are not the
407 same, then at this point, the value's length (in target bytes) is
408 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
409 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
410 len
= gdbarch_addr_bit (gdbarch
) / TARGET_CHAR_BIT
;
412 /* If we are printing it as unsigned, truncate it in case it is actually
413 a negative signed value (e.g. "print/u (short)-1" should print 65535
414 (if shorts are 16 bits) instead of 4294967295). */
415 if (options
->format
!= 'd' || TYPE_UNSIGNED (type
))
417 if (len
< sizeof (LONGEST
))
418 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
421 switch (options
->format
)
426 /* No size specified, like in print. Print varying # of digits. */
427 print_longest (stream
, 'x', 1, val_long
);
436 print_longest (stream
, size
, 1, val_long
);
439 error (_("Undefined output size \"%c\"."), size
);
444 print_longest (stream
, 'd', 1, val_long
);
448 print_longest (stream
, 'u', 0, val_long
);
453 print_longest (stream
, 'o', 1, val_long
);
455 fprintf_filtered (stream
, "0");
460 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
461 print_address (gdbarch
, addr
, stream
);
467 struct value_print_options opts
= *options
;
470 if (TYPE_UNSIGNED (type
))
471 type
= builtin_type (gdbarch
)->builtin_true_unsigned_char
;
473 type
= builtin_type (gdbarch
)->builtin_true_char
;
475 value_print (value_from_longest (type
, val_long
), stream
, &opts
);
480 type
= float_type_from_length (type
);
481 print_floating (valaddr
, type
, stream
);
485 internal_error (__FILE__
, __LINE__
,
486 _("failed internal consistency check"));
489 /* Binary; 't' stands for "two". */
491 char bits
[8 * (sizeof val_long
) + 1];
492 char buf
[8 * (sizeof val_long
) + 32];
497 width
= 8 * (sizeof val_long
);
514 error (_("Undefined output size \"%c\"."), size
);
520 bits
[width
] = (val_long
& 1) ? '1' : '0';
525 while (*cp
&& *cp
== '0')
531 fputs_filtered (buf
, stream
);
536 error (_("Undefined output format \"%c\"."), options
->format
);
540 /* Specify default address for `x' command.
541 The `info lines' command uses this. */
544 set_next_address (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
546 struct type
*ptr_type
= builtin_type (gdbarch
)->builtin_data_ptr
;
548 next_gdbarch
= gdbarch
;
551 /* Make address available to the user as $_. */
552 set_internalvar (lookup_internalvar ("_"),
553 value_from_pointer (ptr_type
, addr
));
556 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
557 after LEADIN. Print nothing if no symbolic name is found nearby.
558 Optionally also print source file and line number, if available.
559 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
560 or to interpret it as a possible C++ name and convert it back to source
561 form. However note that DO_DEMANGLE can be overridden by the specific
562 settings of the demangle and asm_demangle variables. */
565 print_address_symbolic (CORE_ADDR addr
, struct ui_file
*stream
,
566 int do_demangle
, char *leadin
)
569 char *filename
= NULL
;
574 /* Throw away both name and filename. */
575 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
576 make_cleanup (free_current_contents
, &filename
);
578 if (build_address_symbolic (addr
, do_demangle
, &name
, &offset
,
579 &filename
, &line
, &unmapped
))
581 do_cleanups (cleanup_chain
);
585 fputs_filtered (leadin
, stream
);
587 fputs_filtered ("<*", stream
);
589 fputs_filtered ("<", stream
);
590 fputs_filtered (name
, stream
);
592 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
594 /* Append source filename and line number if desired. Give specific
595 line # of this addr, if we have it; else line # of the nearest symbol. */
596 if (print_symbol_filename
&& filename
!= NULL
)
599 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
601 fprintf_filtered (stream
, " in %s", filename
);
604 fputs_filtered ("*>", stream
);
606 fputs_filtered (">", stream
);
608 do_cleanups (cleanup_chain
);
611 /* Given an address ADDR return all the elements needed to print the
612 address in a symbolic form. NAME can be mangled or not depending
613 on DO_DEMANGLE (and also on the asm_demangle global variable,
614 manipulated via ''set print asm-demangle''). Return 0 in case of
615 success, when all the info in the OUT paramters is valid. Return 1
618 build_address_symbolic (CORE_ADDR addr
, /* IN */
619 int do_demangle
, /* IN */
620 char **name
, /* OUT */
621 int *offset
, /* OUT */
622 char **filename
, /* OUT */
624 int *unmapped
) /* OUT */
626 struct minimal_symbol
*msymbol
;
627 struct symbol
*symbol
;
628 CORE_ADDR name_location
= 0;
629 struct obj_section
*section
= NULL
;
630 char *name_temp
= "";
632 /* Let's say it is mapped (not unmapped). */
635 /* Determine if the address is in an overlay, and whether it is
637 if (overlay_debugging
)
639 section
= find_pc_overlay (addr
);
640 if (pc_in_unmapped_range (addr
, section
))
643 addr
= overlay_mapped_address (addr
, section
);
647 /* First try to find the address in the symbol table, then
648 in the minsyms. Take the closest one. */
650 /* This is defective in the sense that it only finds text symbols. So
651 really this is kind of pointless--we should make sure that the
652 minimal symbols have everything we need (by changing that we could
653 save some memory, but for many debug format--ELF/DWARF or
654 anything/stabs--it would be inconvenient to eliminate those minimal
656 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
657 symbol
= find_pc_sect_function (addr
, section
);
661 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
662 if (do_demangle
|| asm_demangle
)
663 name_temp
= SYMBOL_PRINT_NAME (symbol
);
665 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
670 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
672 /* The msymbol is closer to the address than the symbol;
673 use the msymbol instead. */
675 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
676 if (do_demangle
|| asm_demangle
)
677 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
679 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
682 if (symbol
== NULL
&& msymbol
== NULL
)
685 /* If the nearest symbol is too far away, don't print anything symbolic. */
687 /* For when CORE_ADDR is larger than unsigned int, we do math in
688 CORE_ADDR. But when we detect unsigned wraparound in the
689 CORE_ADDR math, we ignore this test and print the offset,
690 because addr+max_symbolic_offset has wrapped through the end
691 of the address space back to the beginning, giving bogus comparison. */
692 if (addr
> name_location
+ max_symbolic_offset
693 && name_location
+ max_symbolic_offset
> name_location
)
696 *offset
= addr
- name_location
;
698 *name
= xstrdup (name_temp
);
700 if (print_symbol_filename
)
702 struct symtab_and_line sal
;
704 sal
= find_pc_sect_line (addr
, section
, 0);
708 *filename
= xstrdup (sal
.symtab
->filename
);
716 /* Print address ADDR symbolically on STREAM.
717 First print it as a number. Then perhaps print
718 <SYMBOL + OFFSET> after the number. */
721 print_address (struct gdbarch
*gdbarch
,
722 CORE_ADDR addr
, struct ui_file
*stream
)
724 fputs_filtered (paddress (gdbarch
, addr
), stream
);
725 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
728 /* Return a prefix for instruction address:
729 "=> " for current instruction, else " ". */
732 pc_prefix (CORE_ADDR addr
)
734 if (has_stack_frames ())
736 struct frame_info
*frame
;
739 frame
= get_selected_frame (NULL
);
740 pc
= get_frame_pc (frame
);
748 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
749 controls whether to print the symbolic name "raw" or demangled.
750 Global setting "addressprint" controls whether to print hex address
754 print_address_demangle (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
755 struct ui_file
*stream
, int do_demangle
)
757 struct value_print_options opts
;
758 get_user_print_options (&opts
);
761 fprintf_filtered (stream
, "0");
763 else if (opts
.addressprint
)
765 fputs_filtered (paddress (gdbarch
, addr
), stream
);
766 print_address_symbolic (addr
, stream
, do_demangle
, " ");
770 print_address_symbolic (addr
, stream
, do_demangle
, "");
775 /* Examine data at address ADDR in format FMT.
776 Fetch it from memory and print on gdb_stdout. */
779 do_examine (struct format_data fmt
, struct gdbarch
*gdbarch
, CORE_ADDR addr
)
784 struct type
*val_type
= NULL
;
787 struct value_print_options opts
;
792 next_gdbarch
= gdbarch
;
795 /* String or instruction format implies fetch single bytes
796 regardless of the specified size. */
797 if (format
== 's' || format
== 'i')
802 /* Pick the appropriate size for an address. */
803 if (gdbarch_ptr_bit (next_gdbarch
) == 64)
805 else if (gdbarch_ptr_bit (next_gdbarch
) == 32)
807 else if (gdbarch_ptr_bit (next_gdbarch
) == 16)
810 /* Bad value for gdbarch_ptr_bit. */
811 internal_error (__FILE__
, __LINE__
,
812 _("failed internal consistency check"));
816 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
817 else if (size
== 'h')
818 val_type
= builtin_type (next_gdbarch
)->builtin_int16
;
819 else if (size
== 'w')
820 val_type
= builtin_type (next_gdbarch
)->builtin_int32
;
821 else if (size
== 'g')
822 val_type
= builtin_type (next_gdbarch
)->builtin_int64
;
829 if (format
== 's' || format
== 'i')
832 get_formatted_print_options (&opts
, format
);
834 /* Print as many objects as specified in COUNT, at most maxelts per line,
835 with the address of the next one at the start of each line. */
841 fputs_filtered (pc_prefix (next_address
), gdb_stdout
);
842 print_address (next_gdbarch
, next_address
, gdb_stdout
);
843 printf_filtered (":");
848 printf_filtered ("\t");
849 /* Note that print_formatted sets next_address for the next
851 last_examine_address
= next_address
;
853 if (last_examine_value
)
854 value_free (last_examine_value
);
856 /* The value to be displayed is not fetched greedily.
857 Instead, to avoid the possibility of a fetched value not
858 being used, its retrieval is delayed until the print code
859 uses it. When examining an instruction stream, the
860 disassembler will perform its own memory fetch using just
861 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
862 the disassembler be modified so that LAST_EXAMINE_VALUE
863 is left with the byte sequence from the last complete
864 instruction fetched from memory? */
865 last_examine_value
= value_at_lazy (val_type
, next_address
);
867 if (last_examine_value
)
868 release_value (last_examine_value
);
870 print_formatted (last_examine_value
, size
, &opts
, gdb_stdout
);
872 /* Display any branch delay slots following the final insn. */
873 if (format
== 'i' && count
== 1)
874 count
+= branch_delay_insns
;
876 printf_filtered ("\n");
877 gdb_flush (gdb_stdout
);
882 validate_format (struct format_data fmt
, char *cmdname
)
885 error (_("Size letters are meaningless in \"%s\" command."), cmdname
);
887 error (_("Item count other than 1 is meaningless in \"%s\" command."),
889 if (fmt
.format
== 'i')
890 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
891 fmt
.format
, cmdname
);
894 /* Evaluate string EXP as an expression in the current language and
895 print the resulting value. EXP may contain a format specifier as the
896 first argument ("/x myvar" for example, to print myvar in hex). */
899 print_command_1 (char *exp
, int inspect
, int voidprint
)
901 struct expression
*expr
;
902 struct cleanup
*old_chain
= 0;
905 struct format_data fmt
;
908 if (exp
&& *exp
== '/')
911 fmt
= decode_format (&exp
, last_format
, 0);
912 validate_format (fmt
, "print");
913 last_format
= format
= fmt
.format
;
926 expr
= parse_expression (exp
);
927 old_chain
= make_cleanup (free_current_contents
, &expr
);
929 val
= evaluate_expression (expr
);
932 val
= access_value_history (0);
934 if (voidprint
|| (val
&& value_type (val
) &&
935 TYPE_CODE (value_type (val
)) != TYPE_CODE_VOID
))
937 struct value_print_options opts
;
938 int histindex
= record_latest_value (val
);
941 annotate_value_history_begin (histindex
, value_type (val
));
943 annotate_value_begin (value_type (val
));
946 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
948 else if (histindex
>= 0)
949 printf_filtered ("$%d = ", histindex
);
952 annotate_value_history_value ();
954 get_formatted_print_options (&opts
, format
);
955 opts
.inspect_it
= inspect
;
958 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
959 printf_filtered ("\n");
962 annotate_value_history_end ();
964 annotate_value_end ();
967 printf_unfiltered ("\") )\030");
971 do_cleanups (old_chain
);
975 print_command (char *exp
, int from_tty
)
977 print_command_1 (exp
, 0, 1);
980 /* Same as print, except in epoch, it gets its own window. */
982 inspect_command (char *exp
, int from_tty
)
984 extern int epoch_interface
;
986 print_command_1 (exp
, epoch_interface
, 1);
989 /* Same as print, except it doesn't print void results. */
991 call_command (char *exp
, int from_tty
)
993 print_command_1 (exp
, 0, 0);
997 output_command (char *exp
, int from_tty
)
999 struct expression
*expr
;
1000 struct cleanup
*old_chain
;
1003 struct format_data fmt
;
1004 struct value_print_options opts
;
1009 if (exp
&& *exp
== '/')
1012 fmt
= decode_format (&exp
, 0, 0);
1013 validate_format (fmt
, "output");
1014 format
= fmt
.format
;
1017 expr
= parse_expression (exp
);
1018 old_chain
= make_cleanup (free_current_contents
, &expr
);
1020 val
= evaluate_expression (expr
);
1022 annotate_value_begin (value_type (val
));
1024 get_formatted_print_options (&opts
, format
);
1026 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
1028 annotate_value_end ();
1031 gdb_flush (gdb_stdout
);
1033 do_cleanups (old_chain
);
1037 set_command (char *exp
, int from_tty
)
1039 struct expression
*expr
= parse_expression (exp
);
1040 struct cleanup
*old_chain
=
1041 make_cleanup (free_current_contents
, &expr
);
1042 evaluate_expression (expr
);
1043 do_cleanups (old_chain
);
1047 sym_info (char *arg
, int from_tty
)
1049 struct minimal_symbol
*msymbol
;
1050 struct objfile
*objfile
;
1051 struct obj_section
*osect
;
1052 CORE_ADDR addr
, sect_addr
;
1054 unsigned int offset
;
1057 error_no_arg (_("address"));
1059 addr
= parse_and_eval_address (arg
);
1060 ALL_OBJSECTIONS (objfile
, osect
)
1062 /* Only process each object file once, even if there's a separate
1064 if (objfile
->separate_debug_objfile_backlink
)
1067 sect_addr
= overlay_mapped_address (addr
, osect
);
1069 if (obj_section_addr (osect
) <= sect_addr
1070 && sect_addr
< obj_section_endaddr (osect
)
1071 && (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, osect
)))
1073 const char *obj_name
, *mapped
, *sec_name
, *msym_name
;
1075 struct cleanup
*old_chain
;
1078 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1079 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1080 sec_name
= osect
->the_bfd_section
->name
;
1081 msym_name
= SYMBOL_PRINT_NAME (msymbol
);
1083 /* Don't print the offset if it is zero.
1084 We assume there's no need to handle i18n of "sym + offset". */
1086 loc_string
= xstrprintf ("%s + %u", msym_name
, offset
);
1088 loc_string
= xstrprintf ("%s", msym_name
);
1090 /* Use a cleanup to free loc_string in case the user quits
1091 a pagination request inside printf_filtered. */
1092 old_chain
= make_cleanup (xfree
, loc_string
);
1094 gdb_assert (osect
->objfile
&& osect
->objfile
->name
);
1095 obj_name
= osect
->objfile
->name
;
1097 if (MULTI_OBJFILE_P ())
1098 if (pc_in_unmapped_range (addr
, osect
))
1099 if (section_is_overlay (osect
))
1100 printf_filtered (_("%s in load address range of "
1101 "%s overlay section %s of %s\n"),
1102 loc_string
, mapped
, sec_name
, obj_name
);
1104 printf_filtered (_("%s in load address range of "
1105 "section %s of %s\n"),
1106 loc_string
, sec_name
, obj_name
);
1108 if (section_is_overlay (osect
))
1109 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1110 loc_string
, mapped
, sec_name
, obj_name
);
1112 printf_filtered (_("%s in section %s of %s\n"),
1113 loc_string
, sec_name
, obj_name
);
1115 if (pc_in_unmapped_range (addr
, osect
))
1116 if (section_is_overlay (osect
))
1117 printf_filtered (_("%s in load address range of %s overlay "
1119 loc_string
, mapped
, sec_name
);
1121 printf_filtered (_("%s in load address range of section %s\n"),
1122 loc_string
, sec_name
);
1124 if (section_is_overlay (osect
))
1125 printf_filtered (_("%s in %s overlay section %s\n"),
1126 loc_string
, mapped
, sec_name
);
1128 printf_filtered (_("%s in section %s\n"),
1129 loc_string
, sec_name
);
1131 do_cleanups (old_chain
);
1135 printf_filtered (_("No symbol matches %s.\n"), arg
);
1139 address_info (char *exp
, int from_tty
)
1141 struct gdbarch
*gdbarch
;
1144 struct minimal_symbol
*msymbol
;
1146 struct obj_section
*section
;
1147 CORE_ADDR load_addr
;
1148 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1149 if exp is a field of `this'. */
1152 error (_("Argument required."));
1154 sym
= lookup_symbol (exp
, get_selected_block (0), VAR_DOMAIN
,
1155 &is_a_field_of_this
);
1158 if (is_a_field_of_this
)
1160 printf_filtered ("Symbol \"");
1161 fprintf_symbol_filtered (gdb_stdout
, exp
,
1162 current_language
->la_language
, DMGL_ANSI
);
1163 printf_filtered ("\" is a field of the local class variable ");
1164 if (current_language
->la_language
== language_objc
)
1165 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1167 printf_filtered ("`this'\n");
1171 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1173 if (msymbol
!= NULL
)
1175 gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
1176 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1178 printf_filtered ("Symbol \"");
1179 fprintf_symbol_filtered (gdb_stdout
, exp
,
1180 current_language
->la_language
, DMGL_ANSI
);
1181 printf_filtered ("\" is at ");
1182 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1183 printf_filtered (" in a file compiled without debugging");
1184 section
= SYMBOL_OBJ_SECTION (msymbol
);
1185 if (section_is_overlay (section
))
1187 load_addr
= overlay_unmapped_address (load_addr
, section
);
1188 printf_filtered (",\n -- loaded at ");
1189 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1190 printf_filtered (" in overlay section %s",
1191 section
->the_bfd_section
->name
);
1193 printf_filtered (".\n");
1196 error (_("No symbol \"%s\" in current context."), exp
);
1200 printf_filtered ("Symbol \"");
1201 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1202 current_language
->la_language
, DMGL_ANSI
);
1203 printf_filtered ("\" is ");
1204 val
= SYMBOL_VALUE (sym
);
1205 section
= SYMBOL_OBJ_SECTION (sym
);
1206 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1208 switch (SYMBOL_CLASS (sym
))
1211 case LOC_CONST_BYTES
:
1212 printf_filtered ("constant");
1216 printf_filtered ("a label at address ");
1217 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1218 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1219 if (section_is_overlay (section
))
1221 load_addr
= overlay_unmapped_address (load_addr
, section
);
1222 printf_filtered (",\n -- loaded at ");
1223 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1224 printf_filtered (" in overlay section %s",
1225 section
->the_bfd_section
->name
);
1230 /* FIXME: cagney/2004-01-26: It should be possible to
1231 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1232 Unfortunately DWARF 2 stores the frame-base (instead of the
1233 function) location in a function's symbol. Oops! For the
1234 moment enable this when/where applicable. */
1235 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, gdb_stdout
);
1239 /* GDBARCH is the architecture associated with the objfile the symbol
1240 is defined in; the target architecture may be different, and may
1241 provide additional registers. However, we do not know the target
1242 architecture at this point. We assume the objfile architecture
1243 will contain all the standard registers that occur in debug info
1245 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1247 if (SYMBOL_IS_ARGUMENT (sym
))
1248 printf_filtered (_("an argument in register %s"),
1249 gdbarch_register_name (gdbarch
, regno
));
1251 printf_filtered (_("a variable in register %s"),
1252 gdbarch_register_name (gdbarch
, regno
));
1256 printf_filtered (_("static storage at address "));
1257 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1258 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1259 if (section_is_overlay (section
))
1261 load_addr
= overlay_unmapped_address (load_addr
, section
);
1262 printf_filtered (_(",\n -- loaded at "));
1263 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1264 printf_filtered (_(" in overlay section %s"),
1265 section
->the_bfd_section
->name
);
1269 case LOC_REGPARM_ADDR
:
1270 /* Note comment at LOC_REGISTER. */
1271 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1272 printf_filtered (_("address of an argument in register %s"),
1273 gdbarch_register_name (gdbarch
, regno
));
1277 printf_filtered (_("an argument at offset %ld"), val
);
1281 printf_filtered (_("a local variable at frame offset %ld"), val
);
1285 printf_filtered (_("a reference argument at offset %ld"), val
);
1289 printf_filtered (_("a typedef"));
1293 printf_filtered (_("a function at address "));
1294 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1295 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1296 if (section_is_overlay (section
))
1298 load_addr
= overlay_unmapped_address (load_addr
, section
);
1299 printf_filtered (_(",\n -- loaded at "));
1300 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1301 printf_filtered (_(" in overlay section %s"),
1302 section
->the_bfd_section
->name
);
1306 case LOC_UNRESOLVED
:
1308 struct minimal_symbol
*msym
;
1310 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, NULL
);
1312 printf_filtered ("unresolved");
1315 section
= SYMBOL_OBJ_SECTION (msym
);
1316 load_addr
= SYMBOL_VALUE_ADDRESS (msym
);
1319 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1320 printf_filtered (_("a thread-local variable at offset %s "
1321 "in the thread-local storage for `%s'"),
1322 paddress (gdbarch
, load_addr
),
1323 section
->objfile
->name
);
1326 printf_filtered (_("static storage at address "));
1327 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1328 if (section_is_overlay (section
))
1330 load_addr
= overlay_unmapped_address (load_addr
, section
);
1331 printf_filtered (_(",\n -- loaded at "));
1332 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1333 printf_filtered (_(" in overlay section %s"),
1334 section
->the_bfd_section
->name
);
1341 case LOC_OPTIMIZED_OUT
:
1342 printf_filtered (_("optimized out"));
1346 printf_filtered (_("of unknown (botched) type"));
1349 printf_filtered (".\n");
1354 x_command (char *exp
, int from_tty
)
1356 struct expression
*expr
;
1357 struct format_data fmt
;
1358 struct cleanup
*old_chain
;
1361 fmt
.format
= last_format
? last_format
: 'x';
1362 fmt
.size
= last_size
;
1366 if (exp
&& *exp
== '/')
1369 fmt
= decode_format (&exp
, last_format
, last_size
);
1372 /* If we have an expression, evaluate it and use it as the address. */
1374 if (exp
!= 0 && *exp
!= 0)
1376 expr
= parse_expression (exp
);
1377 /* Cause expression not to be there any more if this command is
1378 repeated with Newline. But don't clobber a user-defined
1379 command's definition. */
1382 old_chain
= make_cleanup (free_current_contents
, &expr
);
1383 val
= evaluate_expression (expr
);
1384 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1385 val
= value_ind (val
);
1386 /* In rvalue contexts, such as this, functions are coerced into
1387 pointers to functions. This makes "x/i main" work. */
1388 if (/* last_format == 'i' && */
1389 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1390 && VALUE_LVAL (val
) == lval_memory
)
1391 next_address
= value_address (val
);
1393 next_address
= value_as_address (val
);
1395 next_gdbarch
= expr
->gdbarch
;
1396 do_cleanups (old_chain
);
1400 error_no_arg (_("starting display address"));
1402 do_examine (fmt
, next_gdbarch
, next_address
);
1404 /* If the examine succeeds, we remember its size and format for next
1406 last_size
= fmt
.size
;
1407 last_format
= fmt
.format
;
1409 /* Set a couple of internal variables if appropriate. */
1410 if (last_examine_value
)
1412 /* Make last address examined available to the user as $_. Use
1413 the correct pointer type. */
1414 struct type
*pointer_type
1415 = lookup_pointer_type (value_type (last_examine_value
));
1416 set_internalvar (lookup_internalvar ("_"),
1417 value_from_pointer (pointer_type
,
1418 last_examine_address
));
1420 /* Make contents of last address examined available to the user
1421 as $__. If the last value has not been fetched from memory
1422 then don't fetch it now; instead mark it by voiding the $__
1424 if (value_lazy (last_examine_value
))
1425 clear_internalvar (lookup_internalvar ("__"));
1427 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1432 /* Add an expression to the auto-display chain.
1433 Specify the expression. */
1436 display_command (char *exp
, int from_tty
)
1438 struct format_data fmt
;
1439 struct expression
*expr
;
1440 struct display
*new;
1444 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1446 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1447 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1461 fmt
= decode_format (&exp
, 0, 0);
1462 if (fmt
.size
&& fmt
.format
== 0)
1464 if (fmt
.format
== 'i' || fmt
.format
== 's')
1475 innermost_block
= NULL
;
1476 expr
= parse_expression (exp
);
1478 new = (struct display
*) xmalloc (sizeof (struct display
));
1480 new->exp_string
= xstrdup (exp
);
1482 new->block
= innermost_block
;
1483 new->pspace
= current_program_space
;
1484 new->next
= display_chain
;
1485 new->number
= ++display_number
;
1488 display_chain
= new;
1490 if (from_tty
&& target_has_execution
)
1491 do_one_display (new);
1498 free_display (struct display
*d
)
1500 xfree (d
->exp_string
);
1505 /* Clear out the display_chain. Done when new symtabs are loaded,
1506 since this invalidates the types stored in many expressions. */
1509 clear_displays (void)
1513 while ((d
= display_chain
) != NULL
)
1515 display_chain
= d
->next
;
1520 /* Delete the auto-display number NUM. */
1523 delete_display (int num
)
1525 struct display
*d1
, *d
;
1528 error (_("No display number %d."), num
);
1530 if (display_chain
->number
== num
)
1533 display_chain
= d1
->next
;
1537 for (d
= display_chain
;; d
= d
->next
)
1540 error (_("No display number %d."), num
);
1541 if (d
->next
->number
== num
)
1551 /* Delete some values from the auto-display chain.
1552 Specify the element numbers. */
1555 undisplay_command (char *args
, int from_tty
)
1563 if (query (_("Delete all auto-display expressions? ")))
1572 while (*p1
>= '0' && *p1
<= '9')
1574 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1575 error (_("Arguments must be display numbers."));
1579 delete_display (num
);
1582 while (*p
== ' ' || *p
== '\t')
1588 /* Display a single auto-display.
1589 Do nothing if the display cannot be printed in the current context,
1590 or if the display is disabled. */
1593 do_one_display (struct display
*d
)
1595 int within_current_scope
;
1597 if (d
->enabled_p
== 0)
1602 volatile struct gdb_exception ex
;
1603 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1605 innermost_block
= NULL
;
1606 d
->exp
= parse_expression (d
->exp_string
);
1607 d
->block
= innermost_block
;
1611 /* Can't re-parse the expression. Disable this display item. */
1613 warning (_("Unable to display \"%s\": %s"),
1614 d
->exp_string
, ex
.message
);
1621 if (d
->pspace
== current_program_space
)
1622 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1624 within_current_scope
= 0;
1627 within_current_scope
= 1;
1628 if (!within_current_scope
)
1631 current_display_number
= d
->number
;
1633 annotate_display_begin ();
1634 printf_filtered ("%d", d
->number
);
1635 annotate_display_number_end ();
1636 printf_filtered (": ");
1642 annotate_display_format ();
1644 printf_filtered ("x/");
1645 if (d
->format
.count
!= 1)
1646 printf_filtered ("%d", d
->format
.count
);
1647 printf_filtered ("%c", d
->format
.format
);
1648 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1649 printf_filtered ("%c", d
->format
.size
);
1650 printf_filtered (" ");
1652 annotate_display_expression ();
1654 puts_filtered (d
->exp_string
);
1655 annotate_display_expression_end ();
1657 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1658 printf_filtered ("\n");
1660 printf_filtered (" ");
1662 val
= evaluate_expression (d
->exp
);
1663 addr
= value_as_address (val
);
1664 if (d
->format
.format
== 'i')
1665 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1667 annotate_display_value ();
1669 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1673 struct value_print_options opts
;
1675 annotate_display_format ();
1677 if (d
->format
.format
)
1678 printf_filtered ("/%c ", d
->format
.format
);
1680 annotate_display_expression ();
1682 puts_filtered (d
->exp_string
);
1683 annotate_display_expression_end ();
1685 printf_filtered (" = ");
1687 annotate_display_expression ();
1689 get_formatted_print_options (&opts
, d
->format
.format
);
1690 opts
.raw
= d
->format
.raw
;
1691 print_formatted (evaluate_expression (d
->exp
),
1692 d
->format
.size
, &opts
, gdb_stdout
);
1693 printf_filtered ("\n");
1696 annotate_display_end ();
1698 gdb_flush (gdb_stdout
);
1699 current_display_number
= -1;
1702 /* Display all of the values on the auto-display chain which can be
1703 evaluated in the current scope. */
1710 for (d
= display_chain
; d
; d
= d
->next
)
1714 /* Delete the auto-display which we were in the process of displaying.
1715 This is done when there is an error or a signal. */
1718 disable_display (int num
)
1722 for (d
= display_chain
; d
; d
= d
->next
)
1723 if (d
->number
== num
)
1728 printf_unfiltered (_("No display number %d.\n"), num
);
1732 disable_current_display (void)
1734 if (current_display_number
>= 0)
1736 disable_display (current_display_number
);
1737 fprintf_unfiltered (gdb_stderr
, _("\
1738 Disabling display %d to avoid infinite recursion.\n"),
1739 current_display_number
);
1741 current_display_number
= -1;
1745 display_info (char *ignore
, int from_tty
)
1750 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1752 printf_filtered (_("Auto-display expressions now in effect:\n\
1753 Num Enb Expression\n"));
1755 for (d
= display_chain
; d
; d
= d
->next
)
1757 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1759 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1761 else if (d
->format
.format
)
1762 printf_filtered ("/%c ", d
->format
.format
);
1763 puts_filtered (d
->exp_string
);
1764 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1765 printf_filtered (_(" (cannot be evaluated in the current context)"));
1766 printf_filtered ("\n");
1767 gdb_flush (gdb_stdout
);
1772 enable_display (char *args
, int from_tty
)
1781 for (d
= display_chain
; d
; d
= d
->next
)
1788 while (*p1
>= '0' && *p1
<= '9')
1790 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1791 error (_("Arguments must be display numbers."));
1795 for (d
= display_chain
; d
; d
= d
->next
)
1796 if (d
->number
== num
)
1801 printf_unfiltered (_("No display number %d.\n"), num
);
1804 while (*p
== ' ' || *p
== '\t')
1810 disable_display_command (char *args
, int from_tty
)
1818 for (d
= display_chain
; d
; d
= d
->next
)
1825 while (*p1
>= '0' && *p1
<= '9')
1827 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1828 error (_("Arguments must be display numbers."));
1830 disable_display (atoi (p
));
1833 while (*p
== ' ' || *p
== '\t')
1838 /* Return 1 if D uses SOLIB (and will become dangling when SOLIB
1839 is unloaded), otherwise return 0. */
1842 display_uses_solib_p (const struct display
*d
,
1843 const struct so_list
*solib
)
1846 struct expression
*const exp
= d
->exp
;
1847 const union exp_element
*const elts
= exp
->elts
;
1849 if (d
->block
!= NULL
1850 && d
->pspace
== solib
->pspace
1851 && solib_contains_address_p (solib
, d
->block
->startaddr
))
1854 for (endpos
= exp
->nelts
; endpos
> 0; )
1856 int i
, args
, oplen
= 0;
1858 exp
->language_defn
->la_exp_desc
->operator_length (exp
, endpos
,
1860 gdb_assert (oplen
> 0);
1863 if (elts
[i
].opcode
== OP_VAR_VALUE
)
1865 const struct block
*const block
= elts
[i
+ 1].block
;
1866 const struct symbol
*const symbol
= elts
[i
+ 2].symbol
;
1867 const struct obj_section
*const section
=
1868 SYMBOL_OBJ_SECTION (symbol
);
1871 && solib_contains_address_p (solib
,
1875 if (section
&& section
->objfile
== solib
->objfile
)
1884 /* display_chain items point to blocks and expressions. Some expressions in
1885 turn may point to symbols.
1886 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1887 obstack_free'd when a shared library is unloaded.
1888 Clear pointers that are about to become dangling.
1889 Both .exp and .block fields will be restored next time we need to display
1890 an item by re-parsing .exp_string field in the new execution context. */
1893 clear_dangling_display_expressions (struct so_list
*solib
)
1896 struct objfile
*objfile
= NULL
;
1898 for (d
= display_chain
; d
; d
= d
->next
)
1900 if (d
->exp
&& display_uses_solib_p (d
, solib
))
1910 /* Print the value in stack frame FRAME of a variable specified by a
1911 struct symbol. NAME is the name to print; if NULL then VAR's print
1912 name will be used. STREAM is the ui_file on which to print the
1913 value. INDENT specifies the number of indent levels to print
1914 before printing the variable name. */
1917 print_variable_and_value (const char *name
, struct symbol
*var
,
1918 struct frame_info
*frame
,
1919 struct ui_file
*stream
, int indent
)
1922 struct value_print_options opts
;
1925 name
= SYMBOL_PRINT_NAME (var
);
1927 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1929 val
= read_var_value (var
, frame
);
1930 get_user_print_options (&opts
);
1931 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1932 fprintf_filtered (stream
, "\n");
1936 printf_command (char *arg
, int from_tty
)
1940 char *string
= NULL
;
1941 struct value
**val_args
;
1943 char *current_substring
;
1945 int allocated_args
= 20;
1946 struct cleanup
*old_cleanups
;
1948 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
1949 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
1952 error_no_arg (_("format-control string and values to print"));
1954 /* Skip white space before format string */
1955 while (*s
== ' ' || *s
== '\t')
1958 /* A format string should follow, enveloped in double quotes. */
1960 error (_("Bad format string, missing '\"'."));
1962 /* Parse the format-control string and copy it into the string STRING,
1963 processing some kinds of escape sequence. */
1965 f
= string
= (char *) alloca (strlen (s
) + 1);
1973 error (_("Bad format string, non-terminated '\"'."));
2006 /* ??? TODO: handle other escape sequences */
2007 error (_("Unrecognized escape character \\%c in format string."),
2017 /* Skip over " and following space and comma. */
2020 while (*s
== ' ' || *s
== '\t')
2023 if (*s
!= ',' && *s
!= 0)
2024 error (_("Invalid argument syntax"));
2028 while (*s
== ' ' || *s
== '\t')
2031 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2032 substrings
= alloca (strlen (string
) * 2);
2033 current_substring
= substrings
;
2036 /* Now scan the string for %-specs and see what kinds of args they want.
2037 argclass[I] classifies the %-specs so we can give printf_filtered
2038 something of the right size. */
2042 int_arg
, long_arg
, long_long_arg
, ptr_arg
,
2043 string_arg
, wide_string_arg
, wide_char_arg
,
2044 double_arg
, long_double_arg
, decfloat_arg
2046 enum argclass
*argclass
;
2047 enum argclass this_argclass
;
2052 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2059 int seen_hash
= 0, seen_zero
= 0, lcount
= 0, seen_prec
= 0;
2060 int seen_space
= 0, seen_plus
= 0;
2061 int seen_big_l
= 0, seen_h
= 0, seen_big_h
= 0;
2062 int seen_big_d
= 0, seen_double_big_d
= 0;
2065 /* Check the validity of the format specifier, and work
2066 out what argument it expects. We only accept C89
2067 format strings, with the exception of long long (which
2068 we autoconf for). */
2070 /* Skip over "%%". */
2077 /* The first part of a format specifier is a set of flag
2079 while (strchr ("0-+ #", *f
))
2092 /* The next part of a format specifier is a width. */
2093 while (strchr ("0123456789", *f
))
2096 /* The next part of a format specifier is a precision. */
2101 while (strchr ("0123456789", *f
))
2105 /* The next part of a format specifier is a length modifier. */
2126 /* Decimal32 modifier. */
2132 /* Decimal64 and Decimal128 modifiers. */
2137 /* Check for a Decimal128. */
2141 seen_double_big_d
= 1;
2157 if (seen_space
|| seen_plus
)
2164 this_argclass
= int_arg
;
2165 else if (lcount
== 1)
2166 this_argclass
= long_arg
;
2168 this_argclass
= long_long_arg
;
2175 this_argclass
= lcount
== 0 ? int_arg
: wide_char_arg
;
2176 if (lcount
> 1 || seen_h
|| seen_big_l
)
2178 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2183 this_argclass
= ptr_arg
;
2184 if (lcount
|| seen_h
|| seen_big_l
)
2186 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2191 this_argclass
= lcount
== 0 ? string_arg
: wide_string_arg
;
2192 if (lcount
> 1 || seen_h
|| seen_big_l
)
2194 if (seen_zero
|| seen_space
|| seen_plus
)
2203 if (seen_big_h
|| seen_big_d
|| seen_double_big_d
)
2204 this_argclass
= decfloat_arg
;
2205 else if (seen_big_l
)
2206 this_argclass
= long_double_arg
;
2208 this_argclass
= double_arg
;
2210 if (lcount
|| seen_h
)
2215 error (_("`*' not supported for precision or width in printf"));
2218 error (_("Format specifier `n' not supported in printf"));
2221 error (_("Incomplete format specifier at end of format string"));
2224 error (_("Unrecognized format specifier '%c' in printf"), *f
);
2228 error (_("Inappropriate modifiers to format specifier '%c' in printf"),
2233 if (lcount
> 1 && USE_PRINTF_I64
)
2235 /* Windows' printf does support long long, but not the usual way.
2236 Convert %lld to %I64d. */
2237 int length_before_ll
= f
- last_arg
- 1 - lcount
;
2238 strncpy (current_substring
, last_arg
, length_before_ll
);
2239 strcpy (current_substring
+ length_before_ll
, "I64");
2240 current_substring
[length_before_ll
+ 3] =
2241 last_arg
[length_before_ll
+ lcount
];
2242 current_substring
+= length_before_ll
+ 4;
2244 else if (this_argclass
== wide_string_arg
2245 || this_argclass
== wide_char_arg
)
2247 /* Convert %ls or %lc to %s. */
2248 int length_before_ls
= f
- last_arg
- 2;
2249 strncpy (current_substring
, last_arg
, length_before_ls
);
2250 strcpy (current_substring
+ length_before_ls
, "s");
2251 current_substring
+= length_before_ls
+ 2;
2255 strncpy (current_substring
, last_arg
, f
- last_arg
);
2256 current_substring
+= f
- last_arg
;
2258 *current_substring
++ = '\0';
2260 argclass
[nargs_wanted
++] = this_argclass
;
2263 /* Now, parse all arguments and evaluate them.
2264 Store the VALUEs in VAL_ARGS. */
2269 if (nargs
== allocated_args
)
2270 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2271 (allocated_args
*= 2)
2272 * sizeof (struct value
*));
2274 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2282 if (nargs
!= nargs_wanted
)
2283 error (_("Wrong number of arguments for specified format-string"));
2285 /* Now actually print them. */
2286 current_substring
= substrings
;
2287 for (i
= 0; i
< nargs
; i
++)
2289 switch (argclass
[i
])
2296 tem
= value_as_address (val_args
[i
]);
2298 /* This is a %s argument. Find the length of the string. */
2303 read_memory (tem
+ j
, &c
, 1);
2308 /* Copy the string contents into a string inside GDB. */
2309 str
= (gdb_byte
*) alloca (j
+ 1);
2311 read_memory (tem
, str
, j
);
2314 printf_filtered (current_substring
, (char *) str
);
2317 case wide_string_arg
:
2322 struct gdbarch
*gdbarch
2323 = get_type_arch (value_type (val_args
[i
]));
2324 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2325 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2326 "wchar_t", NULL
, 0);
2327 int wcwidth
= TYPE_LENGTH (wctype
);
2328 gdb_byte
*buf
= alloca (wcwidth
);
2329 struct obstack output
;
2330 struct cleanup
*inner_cleanup
;
2332 tem
= value_as_address (val_args
[i
]);
2334 /* This is a %s argument. Find the length of the string. */
2335 for (j
= 0;; j
+= wcwidth
)
2338 read_memory (tem
+ j
, buf
, wcwidth
);
2339 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2343 /* Copy the string contents into a string inside GDB. */
2344 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2346 read_memory (tem
, str
, j
);
2347 memset (&str
[j
], 0, wcwidth
);
2349 obstack_init (&output
);
2350 inner_cleanup
= make_cleanup_obstack_free (&output
);
2352 convert_between_encodings (target_wide_charset (byte_order
),
2355 &output
, translit_char
);
2356 obstack_grow_str0 (&output
, "");
2358 printf_filtered (current_substring
, obstack_base (&output
));
2359 do_cleanups (inner_cleanup
);
2364 struct gdbarch
*gdbarch
2365 = get_type_arch (value_type (val_args
[i
]));
2366 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2367 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2368 "wchar_t", NULL
, 0);
2369 struct type
*valtype
;
2370 struct obstack output
;
2371 struct cleanup
*inner_cleanup
;
2372 const gdb_byte
*bytes
;
2374 valtype
= value_type (val_args
[i
]);
2375 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2376 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2377 error (_("expected wchar_t argument for %%lc"));
2379 bytes
= value_contents (val_args
[i
]);
2381 obstack_init (&output
);
2382 inner_cleanup
= make_cleanup_obstack_free (&output
);
2384 convert_between_encodings (target_wide_charset (byte_order
),
2386 bytes
, TYPE_LENGTH (valtype
),
2387 TYPE_LENGTH (valtype
),
2388 &output
, translit_char
);
2389 obstack_grow_str0 (&output
, "");
2391 printf_filtered (current_substring
, obstack_base (&output
));
2392 do_cleanups (inner_cleanup
);
2397 struct type
*type
= value_type (val_args
[i
]);
2401 /* If format string wants a float, unchecked-convert the value
2402 to floating point of the same size. */
2403 type
= float_type_from_length (type
);
2404 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2406 error (_("Invalid floating value found in program."));
2408 printf_filtered (current_substring
, (double) val
);
2411 case long_double_arg
:
2412 #ifdef HAVE_LONG_DOUBLE
2414 struct type
*type
= value_type (val_args
[i
]);
2418 /* If format string wants a float, unchecked-convert the value
2419 to floating point of the same size. */
2420 type
= float_type_from_length (type
);
2421 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2423 error (_("Invalid floating value found in program."));
2425 printf_filtered (current_substring
, (long double) val
);
2429 error (_("long double not supported in printf"));
2432 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2434 long long val
= value_as_long (val_args
[i
]);
2435 printf_filtered (current_substring
, val
);
2439 error (_("long long not supported in printf"));
2443 int val
= value_as_long (val_args
[i
]);
2444 printf_filtered (current_substring
, val
);
2449 long val
= value_as_long (val_args
[i
]);
2450 printf_filtered (current_substring
, val
);
2454 /* Handles decimal floating values. */
2457 const gdb_byte
*param_ptr
= value_contents (val_args
[i
]);
2458 #if defined (PRINTF_HAS_DECFLOAT)
2459 /* If we have native support for Decimal floating
2460 printing, handle it here. */
2461 printf_filtered (current_substring
, param_ptr
);
2464 /* As a workaround until vasprintf has native support for DFP
2465 we convert the DFP values to string and print them using
2466 the %s format specifier. */
2469 int nnull_chars
= 0;
2471 /* Parameter data. */
2472 struct type
*param_type
= value_type (val_args
[i
]);
2473 unsigned int param_len
= TYPE_LENGTH (param_type
);
2474 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2475 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2477 /* DFP output data. */
2478 struct value
*dfp_value
= NULL
;
2482 struct type
*dfp_type
= NULL
;
2483 char decstr
[MAX_DECIMAL_STRING
];
2485 /* Points to the end of the string so that we can go back
2486 and check for DFP length modifiers. */
2487 eos
= current_substring
+ strlen (current_substring
);
2489 /* Look for the float/double format specifier. */
2490 while (*eos
!= 'f' && *eos
!= 'e' && *eos
!= 'E'
2491 && *eos
!= 'g' && *eos
!= 'G')
2496 /* Search for the '%' char and extract the size and type of
2497 the output decimal value based on its modifiers
2498 (%Hf, %Df, %DDf). */
2499 while (*--sos
!= '%')
2504 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2506 else if (*sos
== 'D' && *(sos
- 1) == 'D')
2509 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2515 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2519 /* Replace %Hf, %Df and %DDf with %s's. */
2522 /* Go through the whole format string and pull the correct
2523 number of chars back to compensate for the change in the
2524 format specifier. */
2525 while (nnull_chars
< nargs
- i
)
2533 /* Conversion between different DFP types. */
2534 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2535 decimal_convert (param_ptr
, param_len
, byte_order
,
2536 dec
, dfp_len
, byte_order
);
2538 /* If this is a non-trivial conversion, just output 0.
2539 A correct converted value can be displayed by explicitly
2540 casting to a DFP type. */
2541 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2543 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2545 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2547 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2549 /* Print the DFP value. */
2550 printf_filtered (current_substring
, decstr
);
2558 /* We avoid the host's %p because pointers are too
2559 likely to be the wrong size. The only interesting
2560 modifier for %p is a width; extract that, and then
2561 handle %p as glibc would: %#x or a literal "(nil)". */
2563 char *p
, *fmt
, *fmt_p
;
2564 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2565 long long val
= value_as_long (val_args
[i
]);
2567 long val
= value_as_long (val_args
[i
]);
2570 fmt
= alloca (strlen (current_substring
) + 5);
2572 /* Copy up to the leading %. */
2573 p
= current_substring
;
2577 int is_percent
= (*p
== '%');
2591 /* Copy any width. */
2592 while (*p
>= '0' && *p
< '9')
2595 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2598 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2604 printf_filtered (fmt
, val
);
2610 printf_filtered (fmt
, "(nil)");
2616 internal_error (__FILE__
, __LINE__
,
2617 _("failed internal consistency check"));
2619 /* Skip to the next substring. */
2620 current_substring
+= strlen (current_substring
) + 1;
2622 /* Print the portion of the format string after the last argument. */
2623 puts_filtered (last_arg
);
2625 do_cleanups (old_cleanups
);
2629 _initialize_printcmd (void)
2631 struct cmd_list_element
*c
;
2633 current_display_number
= -1;
2635 observer_attach_solib_unloaded (clear_dangling_display_expressions
);
2637 add_info ("address", address_info
,
2638 _("Describe where symbol SYM is stored."));
2640 add_info ("symbol", sym_info
, _("\
2641 Describe what symbol is at location ADDR.\n\
2642 Only for symbols with fixed locations (global or static scope)."));
2644 add_com ("x", class_vars
, x_command
, _("\
2645 Examine memory: x/FMT ADDRESS.\n\
2646 ADDRESS is an expression for the memory address to examine.\n\
2647 FMT is a repeat count followed by a format letter and a size letter.\n\
2648 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2649 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2650 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2651 The specified number of objects of the specified size are printed\n\
2652 according to the format.\n\n\
2653 Defaults for format and size letters are those previously used.\n\
2654 Default count is 1. Default address is following last thing printed\n\
2655 with this command or \"print\"."));
2658 add_com ("whereis", class_vars
, whereis_command
,
2659 _("Print line number and file of definition of variable."));
2662 add_info ("display", display_info
, _("\
2663 Expressions to display when program stops, with code numbers."));
2665 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2666 Cancel some expressions to be displayed when program stops.\n\
2667 Arguments are the code numbers of the expressions to stop displaying.\n\
2668 No argument means cancel all automatic-display expressions.\n\
2669 \"delete display\" has the same effect as this command.\n\
2670 Do \"info display\" to see current list of code numbers."),
2673 add_com ("display", class_vars
, display_command
, _("\
2674 Print value of expression EXP each time the program stops.\n\
2675 /FMT may be used before EXP as in the \"print\" command.\n\
2676 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2677 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2678 and examining is done as in the \"x\" command.\n\n\
2679 With no argument, display all currently requested auto-display expressions.\n\
2680 Use \"undisplay\" to cancel display requests previously made."));
2682 add_cmd ("display", class_vars
, enable_display
, _("\
2683 Enable some expressions to be displayed when program stops.\n\
2684 Arguments are the code numbers of the expressions to resume displaying.\n\
2685 No argument means enable all automatic-display expressions.\n\
2686 Do \"info display\" to see current list of code numbers."), &enablelist
);
2688 add_cmd ("display", class_vars
, disable_display_command
, _("\
2689 Disable some expressions to be displayed when program stops.\n\
2690 Arguments are the code numbers of the expressions to stop displaying.\n\
2691 No argument means disable all automatic-display expressions.\n\
2692 Do \"info display\" to see current list of code numbers."), &disablelist
);
2694 add_cmd ("display", class_vars
, undisplay_command
, _("\
2695 Cancel some expressions to be displayed when program stops.\n\
2696 Arguments are the code numbers of the expressions to stop displaying.\n\
2697 No argument means cancel all automatic-display expressions.\n\
2698 Do \"info display\" to see current list of code numbers."), &deletelist
);
2700 add_com ("printf", class_vars
, printf_command
, _("\
2701 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2702 This is useful for formatted output in user-defined commands."));
2704 add_com ("output", class_vars
, output_command
, _("\
2705 Like \"print\" but don't put in value history and don't print newline.\n\
2706 This is useful in user-defined commands."));
2708 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2709 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2710 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2711 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2712 with $), a register (a few standard names starting with $), or an actual\n\
2713 variable in the program being debugged. EXP is any valid expression.\n\
2714 Use \"set variable\" for variables with names identical to set subcommands.\n\
2716 With a subcommand, this command modifies parts of the gdb environment.\n\
2717 You can see these environment settings with the \"show\" command."),
2718 &setlist
, "set ", 1, &cmdlist
);
2720 add_com ("assign", class_vars
, set_command
, _("\
2721 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2722 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2723 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2724 with $), a register (a few standard names starting with $), or an actual\n\
2725 variable in the program being debugged. EXP is any valid expression.\n\
2726 Use \"set variable\" for variables with names identical to set subcommands.\n\
2727 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2728 You can see these environment settings with the \"show\" command."));
2730 /* "call" is the same as "set", but handy for dbx users to call fns. */
2731 c
= add_com ("call", class_vars
, call_command
, _("\
2732 Call a function in the program.\n\
2733 The argument is the function name and arguments, in the notation of the\n\
2734 current working language. The result is printed and saved in the value\n\
2735 history, if it is not void."));
2736 set_cmd_completer (c
, expression_completer
);
2738 add_cmd ("variable", class_vars
, set_command
, _("\
2739 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2740 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2741 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2742 with $), a register (a few standard names starting with $), or an actual\n\
2743 variable in the program being debugged. EXP is any valid expression.\n\
2744 This may usually be abbreviated to simply \"set\"."),
2747 c
= add_com ("print", class_vars
, print_command
, _("\
2748 Print value of expression EXP.\n\
2749 Variables accessible are those of the lexical environment of the selected\n\
2750 stack frame, plus all those whose scope is global or an entire file.\n\
2752 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2753 $$NUM refers to NUM'th value back from the last one.\n\
2754 Names starting with $ refer to registers (with the values they would have\n\
2755 if the program were to return to the stack frame now selected, restoring\n\
2756 all registers saved by frames farther in) or else to debugger\n\
2757 \"convenience\" variables (any such name not a known register).\n\
2758 Use assignment expressions to give values to convenience variables.\n\
2760 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2761 @ is a binary operator for treating consecutive data objects\n\
2762 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2763 element is FOO, whose second element is stored in the space following\n\
2764 where FOO is stored, etc. FOO must be an expression whose value\n\
2765 resides in memory.\n\
2767 EXP may be preceded with /FMT, where FMT is a format letter\n\
2768 but no count or size letter (see \"x\" command)."));
2769 set_cmd_completer (c
, expression_completer
);
2770 add_com_alias ("p", "print", class_vars
, 1);
2772 c
= add_com ("inspect", class_vars
, inspect_command
, _("\
2773 Same as \"print\" command, except that if you are running in the epoch\n\
2774 environment, the value is printed in its own window."));
2775 set_cmd_completer (c
, expression_completer
);
2777 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2778 &max_symbolic_offset
, _("\
2779 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2780 Show the largest offset that will be printed in <symbol+1234> form."), NULL
,
2782 show_max_symbolic_offset
,
2783 &setprintlist
, &showprintlist
);
2784 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2785 &print_symbol_filename
, _("\
2786 Set printing of source filename and line number with <symbol>."), _("\
2787 Show printing of source filename and line number with <symbol>."), NULL
,
2789 show_print_symbol_filename
,
2790 &setprintlist
, &showprintlist
);