1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "gdb_string.h"
27 #include "expression.h"
31 #include "breakpoint.h"
33 #include "gdb-demangle.h"
36 #include "symfile.h" /* for overlay functions */
37 #include "objfiles.h" /* ditto */
38 #include "completer.h" /* for completion functions */
40 #include "gdb_assert.h"
45 #include "exceptions.h"
48 #include "parser-defs.h"
50 #include "arch-utils.h"
51 #include "cli/cli-utils.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
70 /* True if the value should be printed raw -- that is, bypassing
71 python-based formatters. */
75 /* Last specified output format. */
77 static char last_format
= 0;
79 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
81 static char last_size
= 'w';
83 /* Default address to examine next, and associated architecture. */
85 static struct gdbarch
*next_gdbarch
;
86 static CORE_ADDR next_address
;
88 /* Number of delay instructions following current disassembled insn. */
90 static int branch_delay_insns
;
92 /* Last address examined. */
94 static CORE_ADDR last_examine_address
;
96 /* Contents of last address examined.
97 This is not valid past the end of the `x' command! */
99 static struct value
*last_examine_value
;
101 /* Largest offset between a symbolic value and an address, that will be
102 printed as `0x1234 <symbol+offset>'. */
104 static unsigned int max_symbolic_offset
= UINT_MAX
;
106 show_max_symbolic_offset (struct ui_file
*file
, int from_tty
,
107 struct cmd_list_element
*c
, const char *value
)
109 fprintf_filtered (file
,
110 _("The largest offset that will be "
111 "printed in <symbol+1234> form is %s.\n"),
115 /* Append the source filename and linenumber of the symbol when
116 printing a symbolic value as `<symbol at filename:linenum>' if set. */
117 static int print_symbol_filename
= 0;
119 show_print_symbol_filename (struct ui_file
*file
, int from_tty
,
120 struct cmd_list_element
*c
, const char *value
)
122 fprintf_filtered (file
, _("Printing of source filename and "
123 "line number with <symbol> is %s.\n"),
127 /* Number of auto-display expression currently being displayed.
128 So that we can disable it if we get a signal within it.
129 -1 when not doing one. */
131 int current_display_number
;
135 /* Chain link to next auto-display item. */
136 struct display
*next
;
138 /* The expression as the user typed it. */
141 /* Expression to be evaluated and displayed. */
142 struct expression
*exp
;
144 /* Item number of this auto-display item. */
147 /* Display format specified. */
148 struct format_data format
;
150 /* Program space associated with `block'. */
151 struct program_space
*pspace
;
153 /* Innermost block required by this expression when evaluated. */
156 /* Status of this display (enabled or disabled). */
160 /* Chain of expressions whose values should be displayed
161 automatically each time the program stops. */
163 static struct display
*display_chain
;
165 static int display_number
;
167 /* Walk the following statement or block through all displays.
168 ALL_DISPLAYS_SAFE does so even if the statement deletes the current
171 #define ALL_DISPLAYS(B) \
172 for (B = display_chain; B; B = B->next)
174 #define ALL_DISPLAYS_SAFE(B,TMP) \
175 for (B = display_chain; \
176 B ? (TMP = B->next, 1): 0; \
179 /* Prototypes for exported functions. */
181 void output_command (char *, int);
183 void _initialize_printcmd (void);
185 /* Prototypes for local functions. */
187 static void do_one_display (struct display
*);
190 /* Decode a format specification. *STRING_PTR should point to it.
191 OFORMAT and OSIZE are used as defaults for the format and size
192 if none are given in the format specification.
193 If OSIZE is zero, then the size field of the returned value
194 should be set only if a size is explicitly specified by the
196 The structure returned describes all the data
197 found in the specification. In addition, *STRING_PTR is advanced
198 past the specification and past all whitespace following it. */
200 static struct format_data
201 decode_format (char **string_ptr
, int oformat
, int osize
)
203 struct format_data val
;
204 char *p
= *string_ptr
;
211 if (*p
>= '0' && *p
<= '9')
212 val
.count
= atoi (p
);
213 while (*p
>= '0' && *p
<= '9')
216 /* Now process size or format letters that follow. */
220 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
227 else if (*p
>= 'a' && *p
<= 'z')
233 while (*p
== ' ' || *p
== '\t')
237 /* Set defaults for format and size if not specified. */
238 if (val
.format
== '?')
242 /* Neither has been specified. */
243 val
.format
= oformat
;
247 /* If a size is specified, any format makes a reasonable
248 default except 'i'. */
249 val
.format
= oformat
== 'i' ? 'x' : oformat
;
251 else if (val
.size
== '?')
255 /* Pick the appropriate size for an address. This is deferred
256 until do_examine when we know the actual architecture to use.
257 A special size value of 'a' is used to indicate this case. */
258 val
.size
= osize
? 'a' : osize
;
261 /* Floating point has to be word or giantword. */
262 if (osize
== 'w' || osize
== 'g')
265 /* Default it to giantword if the last used size is not
267 val
.size
= osize
? 'g' : osize
;
270 /* Characters default to one byte. */
271 val
.size
= osize
? 'b' : osize
;
274 /* Display strings with byte size chars unless explicitly
280 /* The default is the size most recently specified. */
287 /* Print value VAL on stream according to OPTIONS.
288 Do not end with a newline.
289 SIZE is the letter for the size of datum being printed.
290 This is used to pad hex numbers so they line up. SIZE is 0
291 for print / output and set for examine. */
294 print_formatted (struct value
*val
, int size
,
295 const struct value_print_options
*options
,
296 struct ui_file
*stream
)
298 struct type
*type
= check_typedef (value_type (val
));
299 int len
= TYPE_LENGTH (type
);
301 if (VALUE_LVAL (val
) == lval_memory
)
302 next_address
= value_address (val
) + len
;
306 switch (options
->format
)
310 struct type
*elttype
= value_type (val
);
312 next_address
= (value_address (val
)
313 + val_print_string (elttype
, NULL
,
314 value_address (val
), -1,
315 stream
, options
) * len
);
320 /* We often wrap here if there are long symbolic names. */
322 next_address
= (value_address (val
)
323 + gdb_print_insn (get_type_arch (type
),
324 value_address (val
), stream
,
325 &branch_delay_insns
));
330 if (options
->format
== 0 || options
->format
== 's'
331 || TYPE_CODE (type
) == TYPE_CODE_REF
332 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
333 || TYPE_CODE (type
) == TYPE_CODE_STRING
334 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
335 || TYPE_CODE (type
) == TYPE_CODE_UNION
336 || TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
337 value_print (val
, stream
, options
);
339 /* User specified format, so don't look to the type to tell us
341 val_print_scalar_formatted (type
,
342 value_contents_for_printing (val
),
343 value_embedded_offset (val
),
345 options
, size
, stream
);
348 /* Return builtin floating point type of same length as TYPE.
349 If no such type is found, return TYPE itself. */
351 float_type_from_length (struct type
*type
)
353 struct gdbarch
*gdbarch
= get_type_arch (type
);
354 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
355 unsigned int len
= TYPE_LENGTH (type
);
357 if (len
== TYPE_LENGTH (builtin
->builtin_float
))
358 type
= builtin
->builtin_float
;
359 else if (len
== TYPE_LENGTH (builtin
->builtin_double
))
360 type
= builtin
->builtin_double
;
361 else if (len
== TYPE_LENGTH (builtin
->builtin_long_double
))
362 type
= builtin
->builtin_long_double
;
367 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
368 according to OPTIONS and SIZE on STREAM. Formats s and i are not
369 supported at this level. */
372 print_scalar_formatted (const void *valaddr
, struct type
*type
,
373 const struct value_print_options
*options
,
374 int size
, struct ui_file
*stream
)
376 struct gdbarch
*gdbarch
= get_type_arch (type
);
377 LONGEST val_long
= 0;
378 unsigned int len
= TYPE_LENGTH (type
);
379 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
381 /* String printing should go through val_print_scalar_formatted. */
382 gdb_assert (options
->format
!= 's');
384 if (len
> sizeof(LONGEST
) &&
385 (TYPE_CODE (type
) == TYPE_CODE_INT
386 || TYPE_CODE (type
) == TYPE_CODE_ENUM
))
388 switch (options
->format
)
391 print_octal_chars (stream
, valaddr
, len
, byte_order
);
395 print_decimal_chars (stream
, valaddr
, len
, byte_order
);
398 print_binary_chars (stream
, valaddr
, len
, byte_order
);
401 print_hex_chars (stream
, valaddr
, len
, byte_order
);
404 print_char_chars (stream
, type
, valaddr
, len
, byte_order
);
411 if (options
->format
!= 'f')
412 val_long
= unpack_long (type
, valaddr
);
414 /* If the value is a pointer, and pointers and addresses are not the
415 same, then at this point, the value's length (in target bytes) is
416 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
417 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
418 len
= gdbarch_addr_bit (gdbarch
) / TARGET_CHAR_BIT
;
420 /* If we are printing it as unsigned, truncate it in case it is actually
421 a negative signed value (e.g. "print/u (short)-1" should print 65535
422 (if shorts are 16 bits) instead of 4294967295). */
423 if (options
->format
!= 'd' || TYPE_UNSIGNED (type
))
425 if (len
< sizeof (LONGEST
))
426 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
429 switch (options
->format
)
434 /* No size specified, like in print. Print varying # of digits. */
435 print_longest (stream
, 'x', 1, val_long
);
444 print_longest (stream
, size
, 1, val_long
);
447 error (_("Undefined output size \"%c\"."), size
);
452 print_longest (stream
, 'd', 1, val_long
);
456 print_longest (stream
, 'u', 0, val_long
);
461 print_longest (stream
, 'o', 1, val_long
);
463 fprintf_filtered (stream
, "0");
468 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
470 print_address (gdbarch
, addr
, stream
);
476 struct value_print_options opts
= *options
;
479 if (TYPE_UNSIGNED (type
))
480 type
= builtin_type (gdbarch
)->builtin_true_unsigned_char
;
482 type
= builtin_type (gdbarch
)->builtin_true_char
;
484 value_print (value_from_longest (type
, val_long
), stream
, &opts
);
489 type
= float_type_from_length (type
);
490 print_floating (valaddr
, type
, stream
);
494 internal_error (__FILE__
, __LINE__
,
495 _("failed internal consistency check"));
498 /* Binary; 't' stands for "two". */
500 char bits
[8 * (sizeof val_long
) + 1];
501 char buf
[8 * (sizeof val_long
) + 32];
506 width
= 8 * (sizeof val_long
);
523 error (_("Undefined output size \"%c\"."), size
);
529 bits
[width
] = (val_long
& 1) ? '1' : '0';
534 while (*cp
&& *cp
== '0')
539 strncpy (buf
, cp
, sizeof (bits
));
540 fputs_filtered (buf
, stream
);
545 error (_("Undefined output format \"%c\"."), options
->format
);
549 /* Specify default address for `x' command.
550 The `info lines' command uses this. */
553 set_next_address (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
555 struct type
*ptr_type
= builtin_type (gdbarch
)->builtin_data_ptr
;
557 next_gdbarch
= gdbarch
;
560 /* Make address available to the user as $_. */
561 set_internalvar (lookup_internalvar ("_"),
562 value_from_pointer (ptr_type
, addr
));
565 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
566 after LEADIN. Print nothing if no symbolic name is found nearby.
567 Optionally also print source file and line number, if available.
568 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
569 or to interpret it as a possible C++ name and convert it back to source
570 form. However note that DO_DEMANGLE can be overridden by the specific
571 settings of the demangle and asm_demangle variables. */
574 print_address_symbolic (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
575 struct ui_file
*stream
,
576 int do_demangle
, char *leadin
)
579 char *filename
= NULL
;
584 /* Throw away both name and filename. */
585 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
586 make_cleanup (free_current_contents
, &filename
);
588 if (build_address_symbolic (gdbarch
, addr
, do_demangle
, &name
, &offset
,
589 &filename
, &line
, &unmapped
))
591 do_cleanups (cleanup_chain
);
595 fputs_filtered (leadin
, stream
);
597 fputs_filtered ("<*", stream
);
599 fputs_filtered ("<", stream
);
600 fputs_filtered (name
, stream
);
602 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
604 /* Append source filename and line number if desired. Give specific
605 line # of this addr, if we have it; else line # of the nearest symbol. */
606 if (print_symbol_filename
&& filename
!= NULL
)
609 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
611 fprintf_filtered (stream
, " in %s", filename
);
614 fputs_filtered ("*>", stream
);
616 fputs_filtered (">", stream
);
618 do_cleanups (cleanup_chain
);
621 /* Given an address ADDR return all the elements needed to print the
622 address in a symbolic form. NAME can be mangled or not depending
623 on DO_DEMANGLE (and also on the asm_demangle global variable,
624 manipulated via ''set print asm-demangle''). Return 0 in case of
625 success, when all the info in the OUT paramters is valid. Return 1
628 build_address_symbolic (struct gdbarch
*gdbarch
,
629 CORE_ADDR addr
, /* IN */
630 int do_demangle
, /* IN */
631 char **name
, /* OUT */
632 int *offset
, /* OUT */
633 char **filename
, /* OUT */
635 int *unmapped
) /* OUT */
637 struct minimal_symbol
*msymbol
;
638 struct symbol
*symbol
;
639 CORE_ADDR name_location
= 0;
640 struct obj_section
*section
= NULL
;
641 char *name_temp
= "";
643 /* Let's say it is mapped (not unmapped). */
646 /* Determine if the address is in an overlay, and whether it is
648 if (overlay_debugging
)
650 section
= find_pc_overlay (addr
);
651 if (pc_in_unmapped_range (addr
, section
))
654 addr
= overlay_mapped_address (addr
, section
);
658 /* First try to find the address in the symbol table, then
659 in the minsyms. Take the closest one. */
661 /* This is defective in the sense that it only finds text symbols. So
662 really this is kind of pointless--we should make sure that the
663 minimal symbols have everything we need (by changing that we could
664 save some memory, but for many debug format--ELF/DWARF or
665 anything/stabs--it would be inconvenient to eliminate those minimal
667 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
668 symbol
= find_pc_sect_function (addr
, section
);
672 /* If this is a function (i.e. a code address), strip out any
673 non-address bits. For instance, display a pointer to the
674 first instruction of a Thumb function as <function>; the
675 second instruction will be <function+2>, even though the
676 pointer is <function+3>. This matches the ISA behavior. */
677 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
679 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
680 if (do_demangle
|| asm_demangle
)
681 name_temp
= SYMBOL_PRINT_NAME (symbol
);
683 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
688 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
690 /* The msymbol is closer to the address than the symbol;
691 use the msymbol instead. */
693 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
694 if (do_demangle
|| asm_demangle
)
695 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
697 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
700 if (symbol
== NULL
&& msymbol
== NULL
)
703 /* If the nearest symbol is too far away, don't print anything symbolic. */
705 /* For when CORE_ADDR is larger than unsigned int, we do math in
706 CORE_ADDR. But when we detect unsigned wraparound in the
707 CORE_ADDR math, we ignore this test and print the offset,
708 because addr+max_symbolic_offset has wrapped through the end
709 of the address space back to the beginning, giving bogus comparison. */
710 if (addr
> name_location
+ max_symbolic_offset
711 && name_location
+ max_symbolic_offset
> name_location
)
714 *offset
= addr
- name_location
;
716 *name
= xstrdup (name_temp
);
718 if (print_symbol_filename
)
720 struct symtab_and_line sal
;
722 sal
= find_pc_sect_line (addr
, section
, 0);
726 *filename
= xstrdup (sal
.symtab
->filename
);
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 (struct gdbarch
*gdbarch
,
740 CORE_ADDR addr
, struct ui_file
*stream
)
742 fputs_filtered (paddress (gdbarch
, addr
), stream
);
743 print_address_symbolic (gdbarch
, addr
, stream
, asm_demangle
, " ");
746 /* Return a prefix for instruction address:
747 "=> " for current instruction, else " ". */
750 pc_prefix (CORE_ADDR addr
)
752 if (has_stack_frames ())
754 struct frame_info
*frame
;
757 frame
= get_selected_frame (NULL
);
758 if (get_frame_pc_if_available (frame
, &pc
) && pc
== addr
)
764 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
765 controls whether to print the symbolic name "raw" or demangled.
766 Global setting "addressprint" controls whether to print hex address
770 print_address_demangle (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
771 struct ui_file
*stream
, int do_demangle
)
773 struct value_print_options opts
;
775 get_user_print_options (&opts
);
778 fprintf_filtered (stream
, "0");
780 else if (opts
.addressprint
)
782 fputs_filtered (paddress (gdbarch
, addr
), stream
);
783 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, " ");
787 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, "");
792 /* Examine data at address ADDR in format FMT.
793 Fetch it from memory and print on gdb_stdout. */
796 do_examine (struct format_data fmt
, struct gdbarch
*gdbarch
, CORE_ADDR addr
)
801 struct type
*val_type
= NULL
;
804 struct value_print_options opts
;
809 next_gdbarch
= gdbarch
;
812 /* Instruction format implies fetch single bytes
813 regardless of the specified size.
814 The case of strings is handled in decode_format, only explicit
815 size operator are not changed to 'b'. */
821 /* Pick the appropriate size for an address. */
822 if (gdbarch_ptr_bit (next_gdbarch
) == 64)
824 else if (gdbarch_ptr_bit (next_gdbarch
) == 32)
826 else if (gdbarch_ptr_bit (next_gdbarch
) == 16)
829 /* Bad value for gdbarch_ptr_bit. */
830 internal_error (__FILE__
, __LINE__
,
831 _("failed internal consistency check"));
835 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
836 else if (size
== 'h')
837 val_type
= builtin_type (next_gdbarch
)->builtin_int16
;
838 else if (size
== 'w')
839 val_type
= builtin_type (next_gdbarch
)->builtin_int32
;
840 else if (size
== 'g')
841 val_type
= builtin_type (next_gdbarch
)->builtin_int64
;
845 struct type
*char_type
= NULL
;
847 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
848 if type is not found. */
850 char_type
= builtin_type (next_gdbarch
)->builtin_char16
;
851 else if (size
== 'w')
852 char_type
= builtin_type (next_gdbarch
)->builtin_char32
;
854 val_type
= char_type
;
857 if (size
!= '\0' && size
!= 'b')
858 warning (_("Unable to display strings with "
859 "size '%c', using 'b' instead."), size
);
861 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
870 if (format
== 's' || format
== 'i')
873 get_formatted_print_options (&opts
, format
);
875 /* Print as many objects as specified in COUNT, at most maxelts per line,
876 with the address of the next one at the start of each line. */
882 fputs_filtered (pc_prefix (next_address
), gdb_stdout
);
883 print_address (next_gdbarch
, next_address
, gdb_stdout
);
884 printf_filtered (":");
889 printf_filtered ("\t");
890 /* Note that print_formatted sets next_address for the next
892 last_examine_address
= next_address
;
894 if (last_examine_value
)
895 value_free (last_examine_value
);
897 /* The value to be displayed is not fetched greedily.
898 Instead, to avoid the possibility of a fetched value not
899 being used, its retrieval is delayed until the print code
900 uses it. When examining an instruction stream, the
901 disassembler will perform its own memory fetch using just
902 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
903 the disassembler be modified so that LAST_EXAMINE_VALUE
904 is left with the byte sequence from the last complete
905 instruction fetched from memory? */
906 last_examine_value
= value_at_lazy (val_type
, next_address
);
908 if (last_examine_value
)
909 release_value (last_examine_value
);
911 print_formatted (last_examine_value
, size
, &opts
, gdb_stdout
);
913 /* Display any branch delay slots following the final insn. */
914 if (format
== 'i' && count
== 1)
915 count
+= branch_delay_insns
;
917 printf_filtered ("\n");
918 gdb_flush (gdb_stdout
);
923 validate_format (struct format_data fmt
, char *cmdname
)
926 error (_("Size letters are meaningless in \"%s\" command."), cmdname
);
928 error (_("Item count other than 1 is meaningless in \"%s\" command."),
930 if (fmt
.format
== 'i')
931 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
932 fmt
.format
, cmdname
);
935 /* Evaluate string EXP as an expression in the current language and
936 print the resulting value. EXP may contain a format specifier as the
937 first argument ("/x myvar" for example, to print myvar in hex). */
940 print_command_1 (char *exp
, int inspect
, int voidprint
)
942 struct expression
*expr
;
943 struct cleanup
*old_chain
= 0;
946 struct format_data fmt
;
949 if (exp
&& *exp
== '/')
952 fmt
= decode_format (&exp
, last_format
, 0);
953 validate_format (fmt
, "print");
954 last_format
= format
= fmt
.format
;
966 expr
= parse_expression (exp
);
967 old_chain
= make_cleanup (free_current_contents
, &expr
);
969 val
= evaluate_expression (expr
);
972 val
= access_value_history (0);
974 if (voidprint
|| (val
&& value_type (val
) &&
975 TYPE_CODE (value_type (val
)) != TYPE_CODE_VOID
))
977 struct value_print_options opts
;
978 int histindex
= record_latest_value (val
);
981 annotate_value_history_begin (histindex
, value_type (val
));
983 annotate_value_begin (value_type (val
));
986 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
988 else if (histindex
>= 0)
989 printf_filtered ("$%d = ", histindex
);
992 annotate_value_history_value ();
994 get_formatted_print_options (&opts
, format
);
995 opts
.inspect_it
= inspect
;
998 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
999 printf_filtered ("\n");
1002 annotate_value_history_end ();
1004 annotate_value_end ();
1007 printf_unfiltered ("\") )\030");
1011 do_cleanups (old_chain
);
1015 print_command (char *exp
, int from_tty
)
1017 print_command_1 (exp
, 0, 1);
1020 /* Same as print, except in epoch, it gets its own window. */
1022 inspect_command (char *exp
, int from_tty
)
1024 extern int epoch_interface
;
1026 print_command_1 (exp
, epoch_interface
, 1);
1029 /* Same as print, except it doesn't print void results. */
1031 call_command (char *exp
, int from_tty
)
1033 print_command_1 (exp
, 0, 0);
1037 output_command (char *exp
, int from_tty
)
1039 struct expression
*expr
;
1040 struct cleanup
*old_chain
;
1043 struct format_data fmt
;
1044 struct value_print_options opts
;
1049 if (exp
&& *exp
== '/')
1052 fmt
= decode_format (&exp
, 0, 0);
1053 validate_format (fmt
, "output");
1054 format
= fmt
.format
;
1057 expr
= parse_expression (exp
);
1058 old_chain
= make_cleanup (free_current_contents
, &expr
);
1060 val
= evaluate_expression (expr
);
1062 annotate_value_begin (value_type (val
));
1064 get_formatted_print_options (&opts
, format
);
1066 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
1068 annotate_value_end ();
1071 gdb_flush (gdb_stdout
);
1073 do_cleanups (old_chain
);
1077 set_command (char *exp
, int from_tty
)
1079 struct expression
*expr
= parse_expression (exp
);
1080 struct cleanup
*old_chain
=
1081 make_cleanup (free_current_contents
, &expr
);
1083 evaluate_expression (expr
);
1084 do_cleanups (old_chain
);
1088 sym_info (char *arg
, int from_tty
)
1090 struct minimal_symbol
*msymbol
;
1091 struct objfile
*objfile
;
1092 struct obj_section
*osect
;
1093 CORE_ADDR addr
, sect_addr
;
1095 unsigned int offset
;
1098 error_no_arg (_("address"));
1100 addr
= parse_and_eval_address (arg
);
1101 ALL_OBJSECTIONS (objfile
, osect
)
1103 /* Only process each object file once, even if there's a separate
1105 if (objfile
->separate_debug_objfile_backlink
)
1108 sect_addr
= overlay_mapped_address (addr
, osect
);
1110 if (obj_section_addr (osect
) <= sect_addr
1111 && sect_addr
< obj_section_endaddr (osect
)
1112 && (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, osect
)))
1114 const char *obj_name
, *mapped
, *sec_name
, *msym_name
;
1116 struct cleanup
*old_chain
;
1119 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1120 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1121 sec_name
= osect
->the_bfd_section
->name
;
1122 msym_name
= SYMBOL_PRINT_NAME (msymbol
);
1124 /* Don't print the offset if it is zero.
1125 We assume there's no need to handle i18n of "sym + offset". */
1127 loc_string
= xstrprintf ("%s + %u", msym_name
, offset
);
1129 loc_string
= xstrprintf ("%s", msym_name
);
1131 /* Use a cleanup to free loc_string in case the user quits
1132 a pagination request inside printf_filtered. */
1133 old_chain
= make_cleanup (xfree
, loc_string
);
1135 gdb_assert (osect
->objfile
&& osect
->objfile
->name
);
1136 obj_name
= osect
->objfile
->name
;
1138 if (MULTI_OBJFILE_P ())
1139 if (pc_in_unmapped_range (addr
, osect
))
1140 if (section_is_overlay (osect
))
1141 printf_filtered (_("%s in load address range of "
1142 "%s overlay section %s of %s\n"),
1143 loc_string
, mapped
, sec_name
, obj_name
);
1145 printf_filtered (_("%s in load address range of "
1146 "section %s of %s\n"),
1147 loc_string
, sec_name
, obj_name
);
1149 if (section_is_overlay (osect
))
1150 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1151 loc_string
, mapped
, sec_name
, obj_name
);
1153 printf_filtered (_("%s in section %s of %s\n"),
1154 loc_string
, sec_name
, obj_name
);
1156 if (pc_in_unmapped_range (addr
, osect
))
1157 if (section_is_overlay (osect
))
1158 printf_filtered (_("%s in load address range of %s overlay "
1160 loc_string
, mapped
, sec_name
);
1162 printf_filtered (_("%s in load address range of section %s\n"),
1163 loc_string
, sec_name
);
1165 if (section_is_overlay (osect
))
1166 printf_filtered (_("%s in %s overlay section %s\n"),
1167 loc_string
, mapped
, sec_name
);
1169 printf_filtered (_("%s in section %s\n"),
1170 loc_string
, sec_name
);
1172 do_cleanups (old_chain
);
1176 printf_filtered (_("No symbol matches %s.\n"), arg
);
1180 address_info (char *exp
, int from_tty
)
1182 struct gdbarch
*gdbarch
;
1185 struct minimal_symbol
*msymbol
;
1187 struct obj_section
*section
;
1188 CORE_ADDR load_addr
, context_pc
= 0;
1189 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1190 if exp is a field of `this'. */
1193 error (_("Argument required."));
1195 sym
= lookup_symbol (exp
, get_selected_block (&context_pc
), VAR_DOMAIN
,
1196 &is_a_field_of_this
);
1199 if (is_a_field_of_this
)
1201 printf_filtered ("Symbol \"");
1202 fprintf_symbol_filtered (gdb_stdout
, exp
,
1203 current_language
->la_language
, DMGL_ANSI
);
1204 printf_filtered ("\" is a field of the local class variable ");
1205 if (current_language
->la_language
== language_objc
)
1206 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1208 printf_filtered ("`this'\n");
1212 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1214 if (msymbol
!= NULL
)
1216 gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
1217 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1219 printf_filtered ("Symbol \"");
1220 fprintf_symbol_filtered (gdb_stdout
, exp
,
1221 current_language
->la_language
, DMGL_ANSI
);
1222 printf_filtered ("\" is at ");
1223 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1224 printf_filtered (" in a file compiled without debugging");
1225 section
= SYMBOL_OBJ_SECTION (msymbol
);
1226 if (section_is_overlay (section
))
1228 load_addr
= overlay_unmapped_address (load_addr
, section
);
1229 printf_filtered (",\n -- loaded at ");
1230 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1231 printf_filtered (" in overlay section %s",
1232 section
->the_bfd_section
->name
);
1234 printf_filtered (".\n");
1237 error (_("No symbol \"%s\" in current context."), exp
);
1241 printf_filtered ("Symbol \"");
1242 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1243 current_language
->la_language
, DMGL_ANSI
);
1244 printf_filtered ("\" is ");
1245 val
= SYMBOL_VALUE (sym
);
1246 section
= SYMBOL_OBJ_SECTION (sym
);
1247 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1249 switch (SYMBOL_CLASS (sym
))
1252 case LOC_CONST_BYTES
:
1253 printf_filtered ("constant");
1257 printf_filtered ("a label at address ");
1258 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1259 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1260 if (section_is_overlay (section
))
1262 load_addr
= overlay_unmapped_address (load_addr
, section
);
1263 printf_filtered (",\n -- loaded at ");
1264 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1265 printf_filtered (" in overlay section %s",
1266 section
->the_bfd_section
->name
);
1271 /* FIXME: cagney/2004-01-26: It should be possible to
1272 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1273 Unfortunately DWARF 2 stores the frame-base (instead of the
1274 function) location in a function's symbol. Oops! For the
1275 moment enable this when/where applicable. */
1276 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, context_pc
,
1281 /* GDBARCH is the architecture associated with the objfile the symbol
1282 is defined in; the target architecture may be different, and may
1283 provide additional registers. However, we do not know the target
1284 architecture at this point. We assume the objfile architecture
1285 will contain all the standard registers that occur in debug info
1287 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1289 if (SYMBOL_IS_ARGUMENT (sym
))
1290 printf_filtered (_("an argument in register %s"),
1291 gdbarch_register_name (gdbarch
, regno
));
1293 printf_filtered (_("a variable in register %s"),
1294 gdbarch_register_name (gdbarch
, regno
));
1298 printf_filtered (_("static storage at address "));
1299 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1300 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1301 if (section_is_overlay (section
))
1303 load_addr
= overlay_unmapped_address (load_addr
, section
);
1304 printf_filtered (_(",\n -- loaded at "));
1305 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1306 printf_filtered (_(" in overlay section %s"),
1307 section
->the_bfd_section
->name
);
1311 case LOC_REGPARM_ADDR
:
1312 /* Note comment at LOC_REGISTER. */
1313 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1314 printf_filtered (_("address of an argument in register %s"),
1315 gdbarch_register_name (gdbarch
, regno
));
1319 printf_filtered (_("an argument at offset %ld"), val
);
1323 printf_filtered (_("a local variable at frame offset %ld"), val
);
1327 printf_filtered (_("a reference argument at offset %ld"), val
);
1331 printf_filtered (_("a typedef"));
1335 printf_filtered (_("a function at address "));
1336 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1337 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1338 if (section_is_overlay (section
))
1340 load_addr
= overlay_unmapped_address (load_addr
, section
);
1341 printf_filtered (_(",\n -- loaded at "));
1342 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1343 printf_filtered (_(" in overlay section %s"),
1344 section
->the_bfd_section
->name
);
1348 case LOC_UNRESOLVED
:
1350 struct minimal_symbol
*msym
;
1352 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, NULL
);
1354 printf_filtered ("unresolved");
1357 section
= SYMBOL_OBJ_SECTION (msym
);
1358 load_addr
= SYMBOL_VALUE_ADDRESS (msym
);
1361 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1362 printf_filtered (_("a thread-local variable at offset %s "
1363 "in the thread-local storage for `%s'"),
1364 paddress (gdbarch
, load_addr
),
1365 section
->objfile
->name
);
1368 printf_filtered (_("static storage at address "));
1369 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1370 if (section_is_overlay (section
))
1372 load_addr
= overlay_unmapped_address (load_addr
, section
);
1373 printf_filtered (_(",\n -- loaded at "));
1374 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1375 printf_filtered (_(" in overlay section %s"),
1376 section
->the_bfd_section
->name
);
1383 case LOC_OPTIMIZED_OUT
:
1384 printf_filtered (_("optimized out"));
1388 printf_filtered (_("of unknown (botched) type"));
1391 printf_filtered (".\n");
1396 x_command (char *exp
, int from_tty
)
1398 struct expression
*expr
;
1399 struct format_data fmt
;
1400 struct cleanup
*old_chain
;
1403 fmt
.format
= last_format
? last_format
: 'x';
1404 fmt
.size
= last_size
;
1408 if (exp
&& *exp
== '/')
1411 fmt
= decode_format (&exp
, last_format
, last_size
);
1414 /* If we have an expression, evaluate it and use it as the address. */
1416 if (exp
!= 0 && *exp
!= 0)
1418 expr
= parse_expression (exp
);
1419 /* Cause expression not to be there any more if this command is
1420 repeated with Newline. But don't clobber a user-defined
1421 command's definition. */
1424 old_chain
= make_cleanup (free_current_contents
, &expr
);
1425 val
= evaluate_expression (expr
);
1426 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1427 val
= coerce_ref (val
);
1428 /* In rvalue contexts, such as this, functions are coerced into
1429 pointers to functions. This makes "x/i main" work. */
1430 if (/* last_format == 'i' && */
1431 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1432 && VALUE_LVAL (val
) == lval_memory
)
1433 next_address
= value_address (val
);
1435 next_address
= value_as_address (val
);
1437 next_gdbarch
= expr
->gdbarch
;
1438 do_cleanups (old_chain
);
1442 error_no_arg (_("starting display address"));
1444 do_examine (fmt
, next_gdbarch
, next_address
);
1446 /* If the examine succeeds, we remember its size and format for next
1447 time. Set last_size to 'b' for strings. */
1448 if (fmt
.format
== 's')
1451 last_size
= fmt
.size
;
1452 last_format
= fmt
.format
;
1454 /* Set a couple of internal variables if appropriate. */
1455 if (last_examine_value
)
1457 /* Make last address examined available to the user as $_. Use
1458 the correct pointer type. */
1459 struct type
*pointer_type
1460 = lookup_pointer_type (value_type (last_examine_value
));
1461 set_internalvar (lookup_internalvar ("_"),
1462 value_from_pointer (pointer_type
,
1463 last_examine_address
));
1465 /* Make contents of last address examined available to the user
1466 as $__. If the last value has not been fetched from memory
1467 then don't fetch it now; instead mark it by voiding the $__
1469 if (value_lazy (last_examine_value
))
1470 clear_internalvar (lookup_internalvar ("__"));
1472 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1477 /* Add an expression to the auto-display chain.
1478 Specify the expression. */
1481 display_command (char *exp
, int from_tty
)
1483 struct format_data fmt
;
1484 struct expression
*expr
;
1485 struct display
*new;
1489 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1491 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1492 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1506 fmt
= decode_format (&exp
, 0, 0);
1507 if (fmt
.size
&& fmt
.format
== 0)
1509 if (fmt
.format
== 'i' || fmt
.format
== 's')
1520 innermost_block
= NULL
;
1521 expr
= parse_expression (exp
);
1523 new = (struct display
*) xmalloc (sizeof (struct display
));
1525 new->exp_string
= xstrdup (exp
);
1527 new->block
= innermost_block
;
1528 new->pspace
= current_program_space
;
1529 new->next
= display_chain
;
1530 new->number
= ++display_number
;
1533 display_chain
= new;
1535 if (from_tty
&& target_has_execution
)
1536 do_one_display (new);
1543 free_display (struct display
*d
)
1545 xfree (d
->exp_string
);
1550 /* Clear out the display_chain. Done when new symtabs are loaded,
1551 since this invalidates the types stored in many expressions. */
1554 clear_displays (void)
1558 while ((d
= display_chain
) != NULL
)
1560 display_chain
= d
->next
;
1565 /* Delete the auto-display DISPLAY. */
1568 delete_display (struct display
*display
)
1572 gdb_assert (display
!= NULL
);
1574 if (display_chain
== display
)
1575 display_chain
= display
->next
;
1578 if (d
->next
== display
)
1580 d
->next
= display
->next
;
1584 free_display (display
);
1587 /* Call FUNCTION on each of the displays whose numbers are given in
1588 ARGS. DATA is passed unmodified to FUNCTION. */
1591 map_display_numbers (char *args
,
1592 void (*function
) (struct display
*,
1596 struct get_number_or_range_state state
;
1597 struct display
*b
, *tmp
;
1601 error_no_arg (_("one or more display numbers"));
1603 init_number_or_range (&state
, args
);
1605 while (!state
.finished
)
1607 char *p
= state
.string
;
1609 num
= get_number_or_range (&state
);
1611 warning (_("bad display number at or near '%s'"), p
);
1614 struct display
*d
, *tmp
;
1616 ALL_DISPLAYS_SAFE (d
, tmp
)
1617 if (d
->number
== num
)
1620 printf_unfiltered (_("No display number %d.\n"), num
);
1627 /* Callback for map_display_numbers, that deletes a display. */
1630 do_delete_display (struct display
*d
, void *data
)
1635 /* "undisplay" command. */
1638 undisplay_command (char *args
, int from_tty
)
1641 struct get_number_or_range_state state
;
1645 if (query (_("Delete all auto-display expressions? ")))
1651 map_display_numbers (args
, do_delete_display
, NULL
);
1655 /* Display a single auto-display.
1656 Do nothing if the display cannot be printed in the current context,
1657 or if the display is disabled. */
1660 do_one_display (struct display
*d
)
1662 struct cleanup
*old_chain
;
1663 int within_current_scope
;
1665 if (d
->enabled_p
== 0)
1668 /* The expression carries the architecture that was used at parse time.
1669 This is a problem if the expression depends on architecture features
1670 (e.g. register numbers), and the current architecture is now different.
1671 For example, a display statement like "display/i $pc" is expected to
1672 display the PC register of the current architecture, not the arch at
1673 the time the display command was given. Therefore, we re-parse the
1674 expression if the current architecture has changed. */
1675 if (d
->exp
!= NULL
&& d
->exp
->gdbarch
!= get_current_arch ())
1684 volatile struct gdb_exception ex
;
1686 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1688 innermost_block
= NULL
;
1689 d
->exp
= parse_expression (d
->exp_string
);
1690 d
->block
= innermost_block
;
1694 /* Can't re-parse the expression. Disable this display item. */
1696 warning (_("Unable to display \"%s\": %s"),
1697 d
->exp_string
, ex
.message
);
1704 if (d
->pspace
== current_program_space
)
1705 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1707 within_current_scope
= 0;
1710 within_current_scope
= 1;
1711 if (!within_current_scope
)
1714 old_chain
= make_cleanup_restore_integer (¤t_display_number
);
1715 current_display_number
= d
->number
;
1717 annotate_display_begin ();
1718 printf_filtered ("%d", d
->number
);
1719 annotate_display_number_end ();
1720 printf_filtered (": ");
1723 volatile struct gdb_exception ex
;
1725 annotate_display_format ();
1727 printf_filtered ("x/");
1728 if (d
->format
.count
!= 1)
1729 printf_filtered ("%d", d
->format
.count
);
1730 printf_filtered ("%c", d
->format
.format
);
1731 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1732 printf_filtered ("%c", d
->format
.size
);
1733 printf_filtered (" ");
1735 annotate_display_expression ();
1737 puts_filtered (d
->exp_string
);
1738 annotate_display_expression_end ();
1740 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1741 printf_filtered ("\n");
1743 printf_filtered (" ");
1745 annotate_display_value ();
1747 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1752 val
= evaluate_expression (d
->exp
);
1753 addr
= value_as_address (val
);
1754 if (d
->format
.format
== 'i')
1755 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1756 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1759 fprintf_filtered (gdb_stdout
, _("<error: %s>\n"), ex
.message
);
1763 struct value_print_options opts
;
1764 volatile struct gdb_exception ex
;
1766 annotate_display_format ();
1768 if (d
->format
.format
)
1769 printf_filtered ("/%c ", d
->format
.format
);
1771 annotate_display_expression ();
1773 puts_filtered (d
->exp_string
);
1774 annotate_display_expression_end ();
1776 printf_filtered (" = ");
1778 annotate_display_expression ();
1780 get_formatted_print_options (&opts
, d
->format
.format
);
1781 opts
.raw
= d
->format
.raw
;
1783 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1787 val
= evaluate_expression (d
->exp
);
1788 print_formatted (val
, d
->format
.size
, &opts
, gdb_stdout
);
1791 fprintf_filtered (gdb_stdout
, _("<error: %s>"), ex
.message
);
1792 printf_filtered ("\n");
1795 annotate_display_end ();
1797 gdb_flush (gdb_stdout
);
1798 do_cleanups (old_chain
);
1801 /* Display all of the values on the auto-display chain which can be
1802 evaluated in the current scope. */
1809 for (d
= display_chain
; d
; d
= d
->next
)
1813 /* Delete the auto-display which we were in the process of displaying.
1814 This is done when there is an error or a signal. */
1817 disable_display (int num
)
1821 for (d
= display_chain
; d
; d
= d
->next
)
1822 if (d
->number
== num
)
1827 printf_unfiltered (_("No display number %d.\n"), num
);
1831 disable_current_display (void)
1833 if (current_display_number
>= 0)
1835 disable_display (current_display_number
);
1836 fprintf_unfiltered (gdb_stderr
,
1837 _("Disabling display %d to "
1838 "avoid infinite recursion.\n"),
1839 current_display_number
);
1841 current_display_number
= -1;
1845 display_info (char *ignore
, int from_tty
)
1850 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1852 printf_filtered (_("Auto-display expressions now in effect:\n\
1853 Num Enb Expression\n"));
1855 for (d
= display_chain
; d
; d
= d
->next
)
1857 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1859 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1861 else if (d
->format
.format
)
1862 printf_filtered ("/%c ", d
->format
.format
);
1863 puts_filtered (d
->exp_string
);
1864 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1865 printf_filtered (_(" (cannot be evaluated in the current context)"));
1866 printf_filtered ("\n");
1867 gdb_flush (gdb_stdout
);
1871 /* Callback fo map_display_numbers, that enables or disables the
1872 passed in display D. */
1875 do_enable_disable_display (struct display
*d
, void *data
)
1877 d
->enabled_p
= *(int *) data
;
1880 /* Implamentation of both the "disable display" and "enable display"
1881 commands. ENABLE decides what to do. */
1884 enable_disable_display_command (char *args
, int from_tty
, int enable
)
1891 d
->enabled_p
= enable
;
1895 map_display_numbers (args
, do_enable_disable_display
, &enable
);
1898 /* The "enable display" command. */
1901 enable_display_command (char *args
, int from_tty
)
1903 enable_disable_display_command (args
, from_tty
, 1);
1906 /* The "disable display" command. */
1909 disable_display_command (char *args
, int from_tty
)
1911 enable_disable_display_command (args
, from_tty
, 0);
1914 /* display_chain items point to blocks and expressions. Some expressions in
1915 turn may point to symbols.
1916 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1917 obstack_free'd when a shared library is unloaded.
1918 Clear pointers that are about to become dangling.
1919 Both .exp and .block fields will be restored next time we need to display
1920 an item by re-parsing .exp_string field in the new execution context. */
1923 clear_dangling_display_expressions (struct so_list
*solib
)
1925 struct objfile
*objfile
= solib
->objfile
;
1928 /* With no symbol file we cannot have a block or expression from it. */
1929 if (objfile
== NULL
)
1931 if (objfile
->separate_debug_objfile_backlink
)
1932 objfile
= objfile
->separate_debug_objfile_backlink
;
1933 gdb_assert (objfile
->pspace
== solib
->pspace
);
1935 for (d
= display_chain
; d
!= NULL
; d
= d
->next
)
1937 if (d
->pspace
!= solib
->pspace
)
1940 if (lookup_objfile_from_block (d
->block
) == objfile
1941 || (d
->exp
&& exp_uses_objfile (d
->exp
, objfile
)))
1951 /* Print the value in stack frame FRAME of a variable specified by a
1952 struct symbol. NAME is the name to print; if NULL then VAR's print
1953 name will be used. STREAM is the ui_file on which to print the
1954 value. INDENT specifies the number of indent levels to print
1955 before printing the variable name. */
1958 print_variable_and_value (const char *name
, struct symbol
*var
,
1959 struct frame_info
*frame
,
1960 struct ui_file
*stream
, int indent
)
1962 volatile struct gdb_exception except
;
1965 name
= SYMBOL_PRINT_NAME (var
);
1967 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1968 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1971 struct value_print_options opts
;
1973 val
= read_var_value (var
, frame
);
1974 get_user_print_options (&opts
);
1976 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1978 if (except
.reason
< 0)
1979 fprintf_filtered(stream
, "<error reading variable %s (%s)>", name
,
1981 fprintf_filtered (stream
, "\n");
1984 /* printf "printf format string" ARG to STREAM. */
1987 ui_printf (char *arg
, struct ui_file
*stream
)
1991 char *string
= NULL
;
1992 struct value
**val_args
;
1994 char *current_substring
;
1996 int allocated_args
= 20;
1997 struct cleanup
*old_cleanups
;
1999 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
2000 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2003 error_no_arg (_("format-control string and values to print"));
2005 s
= skip_spaces (s
);
2007 /* A format string should follow, enveloped in double quotes. */
2009 error (_("Bad format string, missing '\"'."));
2011 /* Parse the format-control string and copy it into the string STRING,
2012 processing some kinds of escape sequence. */
2014 f
= string
= (char *) alloca (strlen (s
) + 1);
2022 error (_("Bad format string, non-terminated '\"'."));
2055 /* ??? TODO: handle other escape sequences. */
2056 error (_("Unrecognized escape character \\%c in format string."),
2066 /* Skip over " and following space and comma. */
2069 s
= skip_spaces (s
);
2071 if (*s
!= ',' && *s
!= 0)
2072 error (_("Invalid argument syntax"));
2076 s
= skip_spaces (s
);
2078 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2079 substrings
= alloca (strlen (string
) * 2);
2080 current_substring
= substrings
;
2083 /* Now scan the string for %-specs and see what kinds of args they want.
2084 argclass[I] classifies the %-specs so we can give printf_filtered
2085 something of the right size. */
2089 int_arg
, long_arg
, long_long_arg
, ptr_arg
,
2090 string_arg
, wide_string_arg
, wide_char_arg
,
2091 double_arg
, long_double_arg
, decfloat_arg
2093 enum argclass
*argclass
;
2094 enum argclass this_argclass
;
2099 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2106 int seen_hash
= 0, seen_zero
= 0, lcount
= 0, seen_prec
= 0;
2107 int seen_space
= 0, seen_plus
= 0;
2108 int seen_big_l
= 0, seen_h
= 0, seen_big_h
= 0;
2109 int seen_big_d
= 0, seen_double_big_d
= 0;
2112 /* Check the validity of the format specifier, and work
2113 out what argument it expects. We only accept C89
2114 format strings, with the exception of long long (which
2115 we autoconf for). */
2117 /* Skip over "%%". */
2124 /* The first part of a format specifier is a set of flag
2126 while (strchr ("0-+ #", *f
))
2139 /* The next part of a format specifier is a width. */
2140 while (strchr ("0123456789", *f
))
2143 /* The next part of a format specifier is a precision. */
2148 while (strchr ("0123456789", *f
))
2152 /* The next part of a format specifier is a length modifier. */
2173 /* Decimal32 modifier. */
2179 /* Decimal64 and Decimal128 modifiers. */
2184 /* Check for a Decimal128. */
2188 seen_double_big_d
= 1;
2204 if (seen_space
|| seen_plus
)
2211 this_argclass
= int_arg
;
2212 else if (lcount
== 1)
2213 this_argclass
= long_arg
;
2215 this_argclass
= long_long_arg
;
2222 this_argclass
= lcount
== 0 ? int_arg
: wide_char_arg
;
2223 if (lcount
> 1 || seen_h
|| seen_big_l
)
2225 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2230 this_argclass
= ptr_arg
;
2231 if (lcount
|| seen_h
|| seen_big_l
)
2233 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2238 this_argclass
= lcount
== 0 ? string_arg
: wide_string_arg
;
2239 if (lcount
> 1 || seen_h
|| seen_big_l
)
2241 if (seen_zero
|| seen_space
|| seen_plus
)
2250 if (seen_big_h
|| seen_big_d
|| seen_double_big_d
)
2251 this_argclass
= decfloat_arg
;
2252 else if (seen_big_l
)
2253 this_argclass
= long_double_arg
;
2255 this_argclass
= double_arg
;
2257 if (lcount
|| seen_h
)
2262 error (_("`*' not supported for precision or width in printf"));
2265 error (_("Format specifier `n' not supported in printf"));
2268 error (_("Incomplete format specifier at end of format string"));
2271 error (_("Unrecognized format specifier '%c' in printf"), *f
);
2275 error (_("Inappropriate modifiers to "
2276 "format specifier '%c' in printf"),
2281 if (lcount
> 1 && USE_PRINTF_I64
)
2283 /* Windows' printf does support long long, but not the usual way.
2284 Convert %lld to %I64d. */
2285 int length_before_ll
= f
- last_arg
- 1 - lcount
;
2287 strncpy (current_substring
, last_arg
, length_before_ll
);
2288 strcpy (current_substring
+ length_before_ll
, "I64");
2289 current_substring
[length_before_ll
+ 3] =
2290 last_arg
[length_before_ll
+ lcount
];
2291 current_substring
+= length_before_ll
+ 4;
2293 else if (this_argclass
== wide_string_arg
2294 || this_argclass
== wide_char_arg
)
2296 /* Convert %ls or %lc to %s. */
2297 int length_before_ls
= f
- last_arg
- 2;
2299 strncpy (current_substring
, last_arg
, length_before_ls
);
2300 strcpy (current_substring
+ length_before_ls
, "s");
2301 current_substring
+= length_before_ls
+ 2;
2305 strncpy (current_substring
, last_arg
, f
- last_arg
);
2306 current_substring
+= f
- last_arg
;
2308 *current_substring
++ = '\0';
2310 argclass
[nargs_wanted
++] = this_argclass
;
2313 /* Now, parse all arguments and evaluate them.
2314 Store the VALUEs in VAL_ARGS. */
2320 if (nargs
== allocated_args
)
2321 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2322 (allocated_args
*= 2)
2323 * sizeof (struct value
*));
2325 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2333 if (nargs
!= nargs_wanted
)
2334 error (_("Wrong number of arguments for specified format-string"));
2336 /* Now actually print them. */
2337 current_substring
= substrings
;
2338 for (i
= 0; i
< nargs
; i
++)
2340 switch (argclass
[i
])
2348 tem
= value_as_address (val_args
[i
]);
2350 /* This is a %s argument. Find the length of the string. */
2356 read_memory (tem
+ j
, &c
, 1);
2361 /* Copy the string contents into a string inside GDB. */
2362 str
= (gdb_byte
*) alloca (j
+ 1);
2364 read_memory (tem
, str
, j
);
2367 fprintf_filtered (stream
, current_substring
, (char *) str
);
2370 case wide_string_arg
:
2375 struct gdbarch
*gdbarch
2376 = get_type_arch (value_type (val_args
[i
]));
2377 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2378 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2379 "wchar_t", NULL
, 0);
2380 int wcwidth
= TYPE_LENGTH (wctype
);
2381 gdb_byte
*buf
= alloca (wcwidth
);
2382 struct obstack output
;
2383 struct cleanup
*inner_cleanup
;
2385 tem
= value_as_address (val_args
[i
]);
2387 /* This is a %s argument. Find the length of the string. */
2388 for (j
= 0;; j
+= wcwidth
)
2391 read_memory (tem
+ j
, buf
, wcwidth
);
2392 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2396 /* Copy the string contents into a string inside GDB. */
2397 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2399 read_memory (tem
, str
, j
);
2400 memset (&str
[j
], 0, wcwidth
);
2402 obstack_init (&output
);
2403 inner_cleanup
= make_cleanup_obstack_free (&output
);
2405 convert_between_encodings (target_wide_charset (gdbarch
),
2408 &output
, translit_char
);
2409 obstack_grow_str0 (&output
, "");
2411 fprintf_filtered (stream
, current_substring
,
2412 obstack_base (&output
));
2413 do_cleanups (inner_cleanup
);
2418 struct gdbarch
*gdbarch
2419 = get_type_arch (value_type (val_args
[i
]));
2420 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2421 "wchar_t", NULL
, 0);
2422 struct type
*valtype
;
2423 struct obstack output
;
2424 struct cleanup
*inner_cleanup
;
2425 const gdb_byte
*bytes
;
2427 valtype
= value_type (val_args
[i
]);
2428 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2429 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2430 error (_("expected wchar_t argument for %%lc"));
2432 bytes
= value_contents (val_args
[i
]);
2434 obstack_init (&output
);
2435 inner_cleanup
= make_cleanup_obstack_free (&output
);
2437 convert_between_encodings (target_wide_charset (gdbarch
),
2439 bytes
, TYPE_LENGTH (valtype
),
2440 TYPE_LENGTH (valtype
),
2441 &output
, translit_char
);
2442 obstack_grow_str0 (&output
, "");
2444 fprintf_filtered (stream
, current_substring
,
2445 obstack_base (&output
));
2446 do_cleanups (inner_cleanup
);
2451 struct type
*type
= value_type (val_args
[i
]);
2455 /* If format string wants a float, unchecked-convert the value
2456 to floating point of the same size. */
2457 type
= float_type_from_length (type
);
2458 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2460 error (_("Invalid floating value found in program."));
2462 fprintf_filtered (stream
, current_substring
, (double) val
);
2465 case long_double_arg
:
2466 #ifdef HAVE_LONG_DOUBLE
2468 struct type
*type
= value_type (val_args
[i
]);
2472 /* If format string wants a float, unchecked-convert the value
2473 to floating point of the same size. */
2474 type
= float_type_from_length (type
);
2475 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2477 error (_("Invalid floating value found in program."));
2479 fprintf_filtered (stream
, current_substring
,
2484 error (_("long double not supported in printf"));
2487 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2489 long long val
= value_as_long (val_args
[i
]);
2491 fprintf_filtered (stream
, current_substring
, val
);
2495 error (_("long long not supported in printf"));
2499 int val
= value_as_long (val_args
[i
]);
2501 fprintf_filtered (stream
, current_substring
, val
);
2506 long val
= value_as_long (val_args
[i
]);
2508 fprintf_filtered (stream
, current_substring
, val
);
2512 /* Handles decimal floating values. */
2515 const gdb_byte
*param_ptr
= value_contents (val_args
[i
]);
2517 #if defined (PRINTF_HAS_DECFLOAT)
2518 /* If we have native support for Decimal floating
2519 printing, handle it here. */
2520 fprintf_filtered (stream
, current_substring
, param_ptr
);
2523 /* As a workaround until vasprintf has native support for DFP
2524 we convert the DFP values to string and print them using
2525 the %s format specifier. */
2528 int nnull_chars
= 0;
2530 /* Parameter data. */
2531 struct type
*param_type
= value_type (val_args
[i
]);
2532 unsigned int param_len
= TYPE_LENGTH (param_type
);
2533 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2534 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2536 /* DFP output data. */
2537 struct value
*dfp_value
= NULL
;
2541 struct type
*dfp_type
= NULL
;
2542 char decstr
[MAX_DECIMAL_STRING
];
2544 /* Points to the end of the string so that we can go back
2545 and check for DFP length modifiers. */
2546 eos
= current_substring
+ strlen (current_substring
);
2548 /* Look for the float/double format specifier. */
2549 while (*eos
!= 'f' && *eos
!= 'e' && *eos
!= 'E'
2550 && *eos
!= 'g' && *eos
!= 'G')
2555 /* Search for the '%' char and extract the size and type of
2556 the output decimal value based on its modifiers
2557 (%Hf, %Df, %DDf). */
2558 while (*--sos
!= '%')
2563 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2565 else if (*sos
== 'D' && *(sos
- 1) == 'D')
2568 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2574 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2578 /* Replace %Hf, %Df and %DDf with %s's. */
2581 /* Go through the whole format string and pull the correct
2582 number of chars back to compensate for the change in the
2583 format specifier. */
2584 while (nnull_chars
< nargs
- i
)
2592 /* Conversion between different DFP types. */
2593 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2594 decimal_convert (param_ptr
, param_len
, byte_order
,
2595 dec
, dfp_len
, byte_order
);
2597 /* If this is a non-trivial conversion, just output 0.
2598 A correct converted value can be displayed by explicitly
2599 casting to a DFP type. */
2600 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2602 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2604 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2606 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2608 /* Print the DFP value. */
2609 fprintf_filtered (stream
, current_substring
, decstr
);
2617 /* We avoid the host's %p because pointers are too
2618 likely to be the wrong size. The only interesting
2619 modifier for %p is a width; extract that, and then
2620 handle %p as glibc would: %#x or a literal "(nil)". */
2622 char *p
, *fmt
, *fmt_p
;
2623 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2624 long long val
= value_as_long (val_args
[i
]);
2626 long val
= value_as_long (val_args
[i
]);
2629 fmt
= alloca (strlen (current_substring
) + 5);
2631 /* Copy up to the leading %. */
2632 p
= current_substring
;
2636 int is_percent
= (*p
== '%');
2651 /* Copy any width. */
2652 while (*p
>= '0' && *p
< '9')
2655 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2658 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2664 fprintf_filtered (stream
, fmt
, val
);
2670 fprintf_filtered (stream
, fmt
, "(nil)");
2676 internal_error (__FILE__
, __LINE__
,
2677 _("failed internal consistency check"));
2679 /* Skip to the next substring. */
2680 current_substring
+= strlen (current_substring
) + 1;
2682 /* Print the portion of the format string after the last argument.
2683 Note that this will not include any ordinary %-specs, but it
2684 might include "%%". That is why we use printf_filtered and not
2685 puts_filtered here. Also, we pass a dummy argument because
2686 some platforms have modified GCC to include -Wformat-security
2687 by default, which will warn here if there is no argument. */
2688 fprintf_filtered (stream
, last_arg
, 0);
2690 do_cleanups (old_cleanups
);
2693 /* Implement the "printf" command. */
2696 printf_command (char *arg
, int from_tty
)
2698 ui_printf (arg
, gdb_stdout
);
2701 /* Implement the "eval" command. */
2704 eval_command (char *arg
, int from_tty
)
2706 struct ui_file
*ui_out
= mem_fileopen ();
2707 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (ui_out
);
2710 ui_printf (arg
, ui_out
);
2712 expanded
= ui_file_xstrdup (ui_out
, NULL
);
2713 make_cleanup (xfree
, expanded
);
2715 execute_command (expanded
, from_tty
);
2717 do_cleanups (cleanups
);
2721 _initialize_printcmd (void)
2723 struct cmd_list_element
*c
;
2725 current_display_number
= -1;
2727 observer_attach_solib_unloaded (clear_dangling_display_expressions
);
2729 add_info ("address", address_info
,
2730 _("Describe where symbol SYM is stored."));
2732 add_info ("symbol", sym_info
, _("\
2733 Describe what symbol is at location ADDR.\n\
2734 Only for symbols with fixed locations (global or static scope)."));
2736 add_com ("x", class_vars
, x_command
, _("\
2737 Examine memory: x/FMT ADDRESS.\n\
2738 ADDRESS is an expression for the memory address to examine.\n\
2739 FMT is a repeat count followed by a format letter and a size letter.\n\
2740 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2741 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2742 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2743 The specified number of objects of the specified size are printed\n\
2744 according to the format.\n\n\
2745 Defaults for format and size letters are those previously used.\n\
2746 Default count is 1. Default address is following last thing printed\n\
2747 with this command or \"print\"."));
2750 add_com ("whereis", class_vars
, whereis_command
,
2751 _("Print line number and file of definition of variable."));
2754 add_info ("display", display_info
, _("\
2755 Expressions to display when program stops, with code numbers."));
2757 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2758 Cancel some expressions to be displayed when program stops.\n\
2759 Arguments are the code numbers of the expressions to stop displaying.\n\
2760 No argument means cancel all automatic-display expressions.\n\
2761 \"delete display\" has the same effect as this command.\n\
2762 Do \"info display\" to see current list of code numbers."),
2765 add_com ("display", class_vars
, display_command
, _("\
2766 Print value of expression EXP each time the program stops.\n\
2767 /FMT may be used before EXP as in the \"print\" command.\n\
2768 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2769 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2770 and examining is done as in the \"x\" command.\n\n\
2771 With no argument, display all currently requested auto-display expressions.\n\
2772 Use \"undisplay\" to cancel display requests previously made."));
2774 add_cmd ("display", class_vars
, enable_display_command
, _("\
2775 Enable some expressions to be displayed when program stops.\n\
2776 Arguments are the code numbers of the expressions to resume displaying.\n\
2777 No argument means enable all automatic-display expressions.\n\
2778 Do \"info display\" to see current list of code numbers."), &enablelist
);
2780 add_cmd ("display", class_vars
, disable_display_command
, _("\
2781 Disable some expressions to be displayed when program stops.\n\
2782 Arguments are the code numbers of the expressions to stop displaying.\n\
2783 No argument means disable all automatic-display expressions.\n\
2784 Do \"info display\" to see current list of code numbers."), &disablelist
);
2786 add_cmd ("display", class_vars
, undisplay_command
, _("\
2787 Cancel some expressions to be displayed when program stops.\n\
2788 Arguments are the code numbers of the expressions to stop displaying.\n\
2789 No argument means cancel all automatic-display expressions.\n\
2790 Do \"info display\" to see current list of code numbers."), &deletelist
);
2792 add_com ("printf", class_vars
, printf_command
, _("\
2793 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2794 This is useful for formatted output in user-defined commands."));
2796 add_com ("output", class_vars
, output_command
, _("\
2797 Like \"print\" but don't put in value history and don't print newline.\n\
2798 This is useful in user-defined commands."));
2800 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2801 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2802 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2803 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2804 with $), a register (a few standard names starting with $), or an actual\n\
2805 variable in the program being debugged. EXP is any valid expression.\n\
2806 Use \"set variable\" for variables with names identical to set subcommands.\n\
2808 With a subcommand, this command modifies parts of the gdb environment.\n\
2809 You can see these environment settings with the \"show\" command."),
2810 &setlist
, "set ", 1, &cmdlist
);
2812 add_com ("assign", class_vars
, set_command
, _("\
2813 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2814 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2815 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2816 with $), a register (a few standard names starting with $), or an actual\n\
2817 variable in the program being debugged. EXP is any valid expression.\n\
2818 Use \"set variable\" for variables with names identical to set subcommands.\n\
2819 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2820 You can see these environment settings with the \"show\" command."));
2822 /* "call" is the same as "set", but handy for dbx users to call fns. */
2823 c
= add_com ("call", class_vars
, call_command
, _("\
2824 Call a function in the program.\n\
2825 The argument is the function name and arguments, in the notation of the\n\
2826 current working language. The result is printed and saved in the value\n\
2827 history, if it is not void."));
2828 set_cmd_completer (c
, expression_completer
);
2830 add_cmd ("variable", class_vars
, set_command
, _("\
2831 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2832 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2833 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2834 with $), a register (a few standard names starting with $), or an actual\n\
2835 variable in the program being debugged. EXP is any valid expression.\n\
2836 This may usually be abbreviated to simply \"set\"."),
2839 c
= add_com ("print", class_vars
, print_command
, _("\
2840 Print value of expression EXP.\n\
2841 Variables accessible are those of the lexical environment of the selected\n\
2842 stack frame, plus all those whose scope is global or an entire file.\n\
2844 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2845 $$NUM refers to NUM'th value back from the last one.\n\
2846 Names starting with $ refer to registers (with the values they would have\n\
2847 if the program were to return to the stack frame now selected, restoring\n\
2848 all registers saved by frames farther in) or else to debugger\n\
2849 \"convenience\" variables (any such name not a known register).\n\
2850 Use assignment expressions to give values to convenience variables.\n\
2852 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2853 @ is a binary operator for treating consecutive data objects\n\
2854 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2855 element is FOO, whose second element is stored in the space following\n\
2856 where FOO is stored, etc. FOO must be an expression whose value\n\
2857 resides in memory.\n\
2859 EXP may be preceded with /FMT, where FMT is a format letter\n\
2860 but no count or size letter (see \"x\" command)."));
2861 set_cmd_completer (c
, expression_completer
);
2862 add_com_alias ("p", "print", class_vars
, 1);
2864 c
= add_com ("inspect", class_vars
, inspect_command
, _("\
2865 Same as \"print\" command, except that if you are running in the epoch\n\
2866 environment, the value is printed in its own window."));
2867 set_cmd_completer (c
, expression_completer
);
2869 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2870 &max_symbolic_offset
, _("\
2871 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2872 Show the largest offset that will be printed in <symbol+1234> form."), NULL
,
2874 show_max_symbolic_offset
,
2875 &setprintlist
, &showprintlist
);
2876 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2877 &print_symbol_filename
, _("\
2878 Set printing of source filename and line number with <symbol>."), _("\
2879 Show printing of source filename and line number with <symbol>."), NULL
,
2881 show_print_symbol_filename
,
2882 &setprintlist
, &showprintlist
);
2884 add_com ("eval", no_class
, eval_command
, _("\
2885 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2886 a command line, and call it."));