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 const 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 (const struct value_print_options
*opts
,
771 struct gdbarch
*gdbarch
, CORE_ADDR addr
,
772 struct ui_file
*stream
, int do_demangle
)
776 fprintf_filtered (stream
, "0");
778 else if (opts
->addressprint
)
780 fputs_filtered (paddress (gdbarch
, addr
), stream
);
781 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, " ");
785 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, "");
790 /* Examine data at address ADDR in format FMT.
791 Fetch it from memory and print on gdb_stdout. */
794 do_examine (struct format_data fmt
, struct gdbarch
*gdbarch
, CORE_ADDR addr
)
799 struct type
*val_type
= NULL
;
802 struct value_print_options opts
;
807 next_gdbarch
= gdbarch
;
810 /* Instruction format implies fetch single bytes
811 regardless of the specified size.
812 The case of strings is handled in decode_format, only explicit
813 size operator are not changed to 'b'. */
819 /* Pick the appropriate size for an address. */
820 if (gdbarch_ptr_bit (next_gdbarch
) == 64)
822 else if (gdbarch_ptr_bit (next_gdbarch
) == 32)
824 else if (gdbarch_ptr_bit (next_gdbarch
) == 16)
827 /* Bad value for gdbarch_ptr_bit. */
828 internal_error (__FILE__
, __LINE__
,
829 _("failed internal consistency check"));
833 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
834 else if (size
== 'h')
835 val_type
= builtin_type (next_gdbarch
)->builtin_int16
;
836 else if (size
== 'w')
837 val_type
= builtin_type (next_gdbarch
)->builtin_int32
;
838 else if (size
== 'g')
839 val_type
= builtin_type (next_gdbarch
)->builtin_int64
;
843 struct type
*char_type
= NULL
;
845 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
846 if type is not found. */
848 char_type
= builtin_type (next_gdbarch
)->builtin_char16
;
849 else if (size
== 'w')
850 char_type
= builtin_type (next_gdbarch
)->builtin_char32
;
852 val_type
= char_type
;
855 if (size
!= '\0' && size
!= 'b')
856 warning (_("Unable to display strings with "
857 "size '%c', using 'b' instead."), size
);
859 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
868 if (format
== 's' || format
== 'i')
871 get_formatted_print_options (&opts
, format
);
873 /* Print as many objects as specified in COUNT, at most maxelts per line,
874 with the address of the next one at the start of each line. */
880 fputs_filtered (pc_prefix (next_address
), gdb_stdout
);
881 print_address (next_gdbarch
, next_address
, gdb_stdout
);
882 printf_filtered (":");
887 printf_filtered ("\t");
888 /* Note that print_formatted sets next_address for the next
890 last_examine_address
= next_address
;
892 if (last_examine_value
)
893 value_free (last_examine_value
);
895 /* The value to be displayed is not fetched greedily.
896 Instead, to avoid the possibility of a fetched value not
897 being used, its retrieval is delayed until the print code
898 uses it. When examining an instruction stream, the
899 disassembler will perform its own memory fetch using just
900 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
901 the disassembler be modified so that LAST_EXAMINE_VALUE
902 is left with the byte sequence from the last complete
903 instruction fetched from memory? */
904 last_examine_value
= value_at_lazy (val_type
, next_address
);
906 if (last_examine_value
)
907 release_value (last_examine_value
);
909 print_formatted (last_examine_value
, size
, &opts
, gdb_stdout
);
911 /* Display any branch delay slots following the final insn. */
912 if (format
== 'i' && count
== 1)
913 count
+= branch_delay_insns
;
915 printf_filtered ("\n");
916 gdb_flush (gdb_stdout
);
921 validate_format (struct format_data fmt
, char *cmdname
)
924 error (_("Size letters are meaningless in \"%s\" command."), cmdname
);
926 error (_("Item count other than 1 is meaningless in \"%s\" command."),
928 if (fmt
.format
== 'i')
929 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
930 fmt
.format
, cmdname
);
933 /* Evaluate string EXP as an expression in the current language and
934 print the resulting value. EXP may contain a format specifier as the
935 first argument ("/x myvar" for example, to print myvar in hex). */
938 print_command_1 (char *exp
, int inspect
, int voidprint
)
940 struct expression
*expr
;
941 struct cleanup
*old_chain
= 0;
944 struct format_data fmt
;
947 if (exp
&& *exp
== '/')
950 fmt
= decode_format (&exp
, last_format
, 0);
951 validate_format (fmt
, "print");
952 last_format
= format
= fmt
.format
;
964 expr
= parse_expression (exp
);
965 old_chain
= make_cleanup (free_current_contents
, &expr
);
967 val
= evaluate_expression (expr
);
970 val
= access_value_history (0);
972 if (voidprint
|| (val
&& value_type (val
) &&
973 TYPE_CODE (value_type (val
)) != TYPE_CODE_VOID
))
975 struct value_print_options opts
;
976 int histindex
= record_latest_value (val
);
979 annotate_value_history_begin (histindex
, value_type (val
));
981 annotate_value_begin (value_type (val
));
984 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
986 else if (histindex
>= 0)
987 printf_filtered ("$%d = ", histindex
);
990 annotate_value_history_value ();
992 get_formatted_print_options (&opts
, format
);
993 opts
.inspect_it
= inspect
;
996 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
997 printf_filtered ("\n");
1000 annotate_value_history_end ();
1002 annotate_value_end ();
1005 printf_unfiltered ("\") )\030");
1009 do_cleanups (old_chain
);
1013 print_command (char *exp
, int from_tty
)
1015 print_command_1 (exp
, 0, 1);
1018 /* Same as print, except in epoch, it gets its own window. */
1020 inspect_command (char *exp
, int from_tty
)
1022 extern int epoch_interface
;
1024 print_command_1 (exp
, epoch_interface
, 1);
1027 /* Same as print, except it doesn't print void results. */
1029 call_command (char *exp
, int from_tty
)
1031 print_command_1 (exp
, 0, 0);
1035 output_command (char *exp
, int from_tty
)
1037 struct expression
*expr
;
1038 struct cleanup
*old_chain
;
1041 struct format_data fmt
;
1042 struct value_print_options opts
;
1047 if (exp
&& *exp
== '/')
1050 fmt
= decode_format (&exp
, 0, 0);
1051 validate_format (fmt
, "output");
1052 format
= fmt
.format
;
1055 expr
= parse_expression (exp
);
1056 old_chain
= make_cleanup (free_current_contents
, &expr
);
1058 val
= evaluate_expression (expr
);
1060 annotate_value_begin (value_type (val
));
1062 get_formatted_print_options (&opts
, format
);
1064 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
1066 annotate_value_end ();
1069 gdb_flush (gdb_stdout
);
1071 do_cleanups (old_chain
);
1075 set_command (char *exp
, int from_tty
)
1077 struct expression
*expr
= parse_expression (exp
);
1078 struct cleanup
*old_chain
=
1079 make_cleanup (free_current_contents
, &expr
);
1081 if (expr
->nelts
>= 1)
1082 switch (expr
->elts
[0].opcode
)
1084 case UNOP_PREINCREMENT
:
1085 case UNOP_POSTINCREMENT
:
1086 case UNOP_PREDECREMENT
:
1087 case UNOP_POSTDECREMENT
:
1089 case BINOP_ASSIGN_MODIFY
:
1094 (_("Expression is not an assignment (and might have no effect)"));
1097 evaluate_expression (expr
);
1098 do_cleanups (old_chain
);
1102 sym_info (char *arg
, int from_tty
)
1104 struct minimal_symbol
*msymbol
;
1105 struct objfile
*objfile
;
1106 struct obj_section
*osect
;
1107 CORE_ADDR addr
, sect_addr
;
1109 unsigned int offset
;
1112 error_no_arg (_("address"));
1114 addr
= parse_and_eval_address (arg
);
1115 ALL_OBJSECTIONS (objfile
, osect
)
1117 /* Only process each object file once, even if there's a separate
1119 if (objfile
->separate_debug_objfile_backlink
)
1122 sect_addr
= overlay_mapped_address (addr
, osect
);
1124 if (obj_section_addr (osect
) <= sect_addr
1125 && sect_addr
< obj_section_endaddr (osect
)
1126 && (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, osect
)))
1128 const char *obj_name
, *mapped
, *sec_name
, *msym_name
;
1130 struct cleanup
*old_chain
;
1133 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1134 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1135 sec_name
= osect
->the_bfd_section
->name
;
1136 msym_name
= SYMBOL_PRINT_NAME (msymbol
);
1138 /* Don't print the offset if it is zero.
1139 We assume there's no need to handle i18n of "sym + offset". */
1141 loc_string
= xstrprintf ("%s + %u", msym_name
, offset
);
1143 loc_string
= xstrprintf ("%s", msym_name
);
1145 /* Use a cleanup to free loc_string in case the user quits
1146 a pagination request inside printf_filtered. */
1147 old_chain
= make_cleanup (xfree
, loc_string
);
1149 gdb_assert (osect
->objfile
&& osect
->objfile
->name
);
1150 obj_name
= osect
->objfile
->name
;
1152 if (MULTI_OBJFILE_P ())
1153 if (pc_in_unmapped_range (addr
, osect
))
1154 if (section_is_overlay (osect
))
1155 printf_filtered (_("%s in load address range of "
1156 "%s overlay section %s of %s\n"),
1157 loc_string
, mapped
, sec_name
, obj_name
);
1159 printf_filtered (_("%s in load address range of "
1160 "section %s of %s\n"),
1161 loc_string
, sec_name
, obj_name
);
1163 if (section_is_overlay (osect
))
1164 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1165 loc_string
, mapped
, sec_name
, obj_name
);
1167 printf_filtered (_("%s in section %s of %s\n"),
1168 loc_string
, sec_name
, obj_name
);
1170 if (pc_in_unmapped_range (addr
, osect
))
1171 if (section_is_overlay (osect
))
1172 printf_filtered (_("%s in load address range of %s overlay "
1174 loc_string
, mapped
, sec_name
);
1176 printf_filtered (_("%s in load address range of section %s\n"),
1177 loc_string
, sec_name
);
1179 if (section_is_overlay (osect
))
1180 printf_filtered (_("%s in %s overlay section %s\n"),
1181 loc_string
, mapped
, sec_name
);
1183 printf_filtered (_("%s in section %s\n"),
1184 loc_string
, sec_name
);
1186 do_cleanups (old_chain
);
1190 printf_filtered (_("No symbol matches %s.\n"), arg
);
1194 address_info (char *exp
, int from_tty
)
1196 struct gdbarch
*gdbarch
;
1199 struct minimal_symbol
*msymbol
;
1201 struct obj_section
*section
;
1202 CORE_ADDR load_addr
, context_pc
= 0;
1203 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1204 if exp is a field of `this'. */
1207 error (_("Argument required."));
1209 sym
= lookup_symbol (exp
, get_selected_block (&context_pc
), VAR_DOMAIN
,
1210 &is_a_field_of_this
);
1213 if (is_a_field_of_this
)
1215 printf_filtered ("Symbol \"");
1216 fprintf_symbol_filtered (gdb_stdout
, exp
,
1217 current_language
->la_language
, DMGL_ANSI
);
1218 printf_filtered ("\" is a field of the local class variable ");
1219 if (current_language
->la_language
== language_objc
)
1220 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1222 printf_filtered ("`this'\n");
1226 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1228 if (msymbol
!= NULL
)
1230 gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
1231 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1233 printf_filtered ("Symbol \"");
1234 fprintf_symbol_filtered (gdb_stdout
, exp
,
1235 current_language
->la_language
, DMGL_ANSI
);
1236 printf_filtered ("\" is at ");
1237 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1238 printf_filtered (" in a file compiled without debugging");
1239 section
= SYMBOL_OBJ_SECTION (msymbol
);
1240 if (section_is_overlay (section
))
1242 load_addr
= overlay_unmapped_address (load_addr
, section
);
1243 printf_filtered (",\n -- loaded at ");
1244 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1245 printf_filtered (" in overlay section %s",
1246 section
->the_bfd_section
->name
);
1248 printf_filtered (".\n");
1251 error (_("No symbol \"%s\" in current context."), exp
);
1255 printf_filtered ("Symbol \"");
1256 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1257 current_language
->la_language
, DMGL_ANSI
);
1258 printf_filtered ("\" is ");
1259 val
= SYMBOL_VALUE (sym
);
1260 section
= SYMBOL_OBJ_SECTION (sym
);
1261 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1263 switch (SYMBOL_CLASS (sym
))
1266 case LOC_CONST_BYTES
:
1267 printf_filtered ("constant");
1271 printf_filtered ("a label at address ");
1272 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1273 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1274 if (section_is_overlay (section
))
1276 load_addr
= overlay_unmapped_address (load_addr
, section
);
1277 printf_filtered (",\n -- loaded at ");
1278 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1279 printf_filtered (" in overlay section %s",
1280 section
->the_bfd_section
->name
);
1285 /* FIXME: cagney/2004-01-26: It should be possible to
1286 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1287 Unfortunately DWARF 2 stores the frame-base (instead of the
1288 function) location in a function's symbol. Oops! For the
1289 moment enable this when/where applicable. */
1290 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, context_pc
,
1295 /* GDBARCH is the architecture associated with the objfile the symbol
1296 is defined in; the target architecture may be different, and may
1297 provide additional registers. However, we do not know the target
1298 architecture at this point. We assume the objfile architecture
1299 will contain all the standard registers that occur in debug info
1301 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1303 if (SYMBOL_IS_ARGUMENT (sym
))
1304 printf_filtered (_("an argument in register %s"),
1305 gdbarch_register_name (gdbarch
, regno
));
1307 printf_filtered (_("a variable in register %s"),
1308 gdbarch_register_name (gdbarch
, regno
));
1312 printf_filtered (_("static storage at address "));
1313 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1314 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1315 if (section_is_overlay (section
))
1317 load_addr
= overlay_unmapped_address (load_addr
, section
);
1318 printf_filtered (_(",\n -- loaded at "));
1319 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1320 printf_filtered (_(" in overlay section %s"),
1321 section
->the_bfd_section
->name
);
1325 case LOC_REGPARM_ADDR
:
1326 /* Note comment at LOC_REGISTER. */
1327 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1328 printf_filtered (_("address of an argument in register %s"),
1329 gdbarch_register_name (gdbarch
, regno
));
1333 printf_filtered (_("an argument at offset %ld"), val
);
1337 printf_filtered (_("a local variable at frame offset %ld"), val
);
1341 printf_filtered (_("a reference argument at offset %ld"), val
);
1345 printf_filtered (_("a typedef"));
1349 printf_filtered (_("a function at address "));
1350 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1351 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1352 if (section_is_overlay (section
))
1354 load_addr
= overlay_unmapped_address (load_addr
, section
);
1355 printf_filtered (_(",\n -- loaded at "));
1356 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1357 printf_filtered (_(" in overlay section %s"),
1358 section
->the_bfd_section
->name
);
1362 case LOC_UNRESOLVED
:
1364 struct minimal_symbol
*msym
;
1366 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, NULL
);
1368 printf_filtered ("unresolved");
1371 section
= SYMBOL_OBJ_SECTION (msym
);
1372 load_addr
= SYMBOL_VALUE_ADDRESS (msym
);
1375 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1376 printf_filtered (_("a thread-local variable at offset %s "
1377 "in the thread-local storage for `%s'"),
1378 paddress (gdbarch
, load_addr
),
1379 section
->objfile
->name
);
1382 printf_filtered (_("static storage at address "));
1383 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1384 if (section_is_overlay (section
))
1386 load_addr
= overlay_unmapped_address (load_addr
, section
);
1387 printf_filtered (_(",\n -- loaded at "));
1388 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1389 printf_filtered (_(" in overlay section %s"),
1390 section
->the_bfd_section
->name
);
1397 case LOC_OPTIMIZED_OUT
:
1398 printf_filtered (_("optimized out"));
1402 printf_filtered (_("of unknown (botched) type"));
1405 printf_filtered (".\n");
1410 x_command (char *exp
, int from_tty
)
1412 struct expression
*expr
;
1413 struct format_data fmt
;
1414 struct cleanup
*old_chain
;
1417 fmt
.format
= last_format
? last_format
: 'x';
1418 fmt
.size
= last_size
;
1422 if (exp
&& *exp
== '/')
1425 fmt
= decode_format (&exp
, last_format
, last_size
);
1428 /* If we have an expression, evaluate it and use it as the address. */
1430 if (exp
!= 0 && *exp
!= 0)
1432 expr
= parse_expression (exp
);
1433 /* Cause expression not to be there any more if this command is
1434 repeated with Newline. But don't clobber a user-defined
1435 command's definition. */
1438 old_chain
= make_cleanup (free_current_contents
, &expr
);
1439 val
= evaluate_expression (expr
);
1440 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1441 val
= coerce_ref (val
);
1442 /* In rvalue contexts, such as this, functions are coerced into
1443 pointers to functions. This makes "x/i main" work. */
1444 if (/* last_format == 'i' && */
1445 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1446 && VALUE_LVAL (val
) == lval_memory
)
1447 next_address
= value_address (val
);
1449 next_address
= value_as_address (val
);
1451 next_gdbarch
= expr
->gdbarch
;
1452 do_cleanups (old_chain
);
1456 error_no_arg (_("starting display address"));
1458 do_examine (fmt
, next_gdbarch
, next_address
);
1460 /* If the examine succeeds, we remember its size and format for next
1461 time. Set last_size to 'b' for strings. */
1462 if (fmt
.format
== 's')
1465 last_size
= fmt
.size
;
1466 last_format
= fmt
.format
;
1468 /* Set a couple of internal variables if appropriate. */
1469 if (last_examine_value
)
1471 /* Make last address examined available to the user as $_. Use
1472 the correct pointer type. */
1473 struct type
*pointer_type
1474 = lookup_pointer_type (value_type (last_examine_value
));
1475 set_internalvar (lookup_internalvar ("_"),
1476 value_from_pointer (pointer_type
,
1477 last_examine_address
));
1479 /* Make contents of last address examined available to the user
1480 as $__. If the last value has not been fetched from memory
1481 then don't fetch it now; instead mark it by voiding the $__
1483 if (value_lazy (last_examine_value
))
1484 clear_internalvar (lookup_internalvar ("__"));
1486 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1491 /* Add an expression to the auto-display chain.
1492 Specify the expression. */
1495 display_command (char *exp
, int from_tty
)
1497 struct format_data fmt
;
1498 struct expression
*expr
;
1499 struct display
*new;
1503 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1505 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1506 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1520 fmt
= decode_format (&exp
, 0, 0);
1521 if (fmt
.size
&& fmt
.format
== 0)
1523 if (fmt
.format
== 'i' || fmt
.format
== 's')
1534 innermost_block
= NULL
;
1535 expr
= parse_expression (exp
);
1537 new = (struct display
*) xmalloc (sizeof (struct display
));
1539 new->exp_string
= xstrdup (exp
);
1541 new->block
= innermost_block
;
1542 new->pspace
= current_program_space
;
1543 new->next
= display_chain
;
1544 new->number
= ++display_number
;
1547 display_chain
= new;
1549 if (from_tty
&& target_has_execution
)
1550 do_one_display (new);
1557 free_display (struct display
*d
)
1559 xfree (d
->exp_string
);
1564 /* Clear out the display_chain. Done when new symtabs are loaded,
1565 since this invalidates the types stored in many expressions. */
1568 clear_displays (void)
1572 while ((d
= display_chain
) != NULL
)
1574 display_chain
= d
->next
;
1579 /* Delete the auto-display DISPLAY. */
1582 delete_display (struct display
*display
)
1586 gdb_assert (display
!= NULL
);
1588 if (display_chain
== display
)
1589 display_chain
= display
->next
;
1592 if (d
->next
== display
)
1594 d
->next
= display
->next
;
1598 free_display (display
);
1601 /* Call FUNCTION on each of the displays whose numbers are given in
1602 ARGS. DATA is passed unmodified to FUNCTION. */
1605 map_display_numbers (char *args
,
1606 void (*function
) (struct display
*,
1610 struct get_number_or_range_state state
;
1611 struct display
*b
, *tmp
;
1615 error_no_arg (_("one or more display numbers"));
1617 init_number_or_range (&state
, args
);
1619 while (!state
.finished
)
1621 char *p
= state
.string
;
1623 num
= get_number_or_range (&state
);
1625 warning (_("bad display number at or near '%s'"), p
);
1628 struct display
*d
, *tmp
;
1630 ALL_DISPLAYS_SAFE (d
, tmp
)
1631 if (d
->number
== num
)
1634 printf_unfiltered (_("No display number %d.\n"), num
);
1641 /* Callback for map_display_numbers, that deletes a display. */
1644 do_delete_display (struct display
*d
, void *data
)
1649 /* "undisplay" command. */
1652 undisplay_command (char *args
, int from_tty
)
1655 struct get_number_or_range_state state
;
1659 if (query (_("Delete all auto-display expressions? ")))
1665 map_display_numbers (args
, do_delete_display
, NULL
);
1669 /* Display a single auto-display.
1670 Do nothing if the display cannot be printed in the current context,
1671 or if the display is disabled. */
1674 do_one_display (struct display
*d
)
1676 struct cleanup
*old_chain
;
1677 int within_current_scope
;
1679 if (d
->enabled_p
== 0)
1682 /* The expression carries the architecture that was used at parse time.
1683 This is a problem if the expression depends on architecture features
1684 (e.g. register numbers), and the current architecture is now different.
1685 For example, a display statement like "display/i $pc" is expected to
1686 display the PC register of the current architecture, not the arch at
1687 the time the display command was given. Therefore, we re-parse the
1688 expression if the current architecture has changed. */
1689 if (d
->exp
!= NULL
&& d
->exp
->gdbarch
!= get_current_arch ())
1698 volatile struct gdb_exception ex
;
1700 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1702 innermost_block
= NULL
;
1703 d
->exp
= parse_expression (d
->exp_string
);
1704 d
->block
= innermost_block
;
1708 /* Can't re-parse the expression. Disable this display item. */
1710 warning (_("Unable to display \"%s\": %s"),
1711 d
->exp_string
, ex
.message
);
1718 if (d
->pspace
== current_program_space
)
1719 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1721 within_current_scope
= 0;
1724 within_current_scope
= 1;
1725 if (!within_current_scope
)
1728 old_chain
= make_cleanup_restore_integer (¤t_display_number
);
1729 current_display_number
= d
->number
;
1731 annotate_display_begin ();
1732 printf_filtered ("%d", d
->number
);
1733 annotate_display_number_end ();
1734 printf_filtered (": ");
1737 volatile struct gdb_exception ex
;
1739 annotate_display_format ();
1741 printf_filtered ("x/");
1742 if (d
->format
.count
!= 1)
1743 printf_filtered ("%d", d
->format
.count
);
1744 printf_filtered ("%c", d
->format
.format
);
1745 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1746 printf_filtered ("%c", d
->format
.size
);
1747 printf_filtered (" ");
1749 annotate_display_expression ();
1751 puts_filtered (d
->exp_string
);
1752 annotate_display_expression_end ();
1754 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1755 printf_filtered ("\n");
1757 printf_filtered (" ");
1759 annotate_display_value ();
1761 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1766 val
= evaluate_expression (d
->exp
);
1767 addr
= value_as_address (val
);
1768 if (d
->format
.format
== 'i')
1769 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1770 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1773 fprintf_filtered (gdb_stdout
, _("<error: %s>\n"), ex
.message
);
1777 struct value_print_options opts
;
1778 volatile struct gdb_exception ex
;
1780 annotate_display_format ();
1782 if (d
->format
.format
)
1783 printf_filtered ("/%c ", d
->format
.format
);
1785 annotate_display_expression ();
1787 puts_filtered (d
->exp_string
);
1788 annotate_display_expression_end ();
1790 printf_filtered (" = ");
1792 annotate_display_expression ();
1794 get_formatted_print_options (&opts
, d
->format
.format
);
1795 opts
.raw
= d
->format
.raw
;
1797 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1801 val
= evaluate_expression (d
->exp
);
1802 print_formatted (val
, d
->format
.size
, &opts
, gdb_stdout
);
1805 fprintf_filtered (gdb_stdout
, _("<error: %s>"), ex
.message
);
1806 printf_filtered ("\n");
1809 annotate_display_end ();
1811 gdb_flush (gdb_stdout
);
1812 do_cleanups (old_chain
);
1815 /* Display all of the values on the auto-display chain which can be
1816 evaluated in the current scope. */
1823 for (d
= display_chain
; d
; d
= d
->next
)
1827 /* Delete the auto-display which we were in the process of displaying.
1828 This is done when there is an error or a signal. */
1831 disable_display (int num
)
1835 for (d
= display_chain
; d
; d
= d
->next
)
1836 if (d
->number
== num
)
1841 printf_unfiltered (_("No display number %d.\n"), num
);
1845 disable_current_display (void)
1847 if (current_display_number
>= 0)
1849 disable_display (current_display_number
);
1850 fprintf_unfiltered (gdb_stderr
,
1851 _("Disabling display %d to "
1852 "avoid infinite recursion.\n"),
1853 current_display_number
);
1855 current_display_number
= -1;
1859 display_info (char *ignore
, int from_tty
)
1864 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1866 printf_filtered (_("Auto-display expressions now in effect:\n\
1867 Num Enb Expression\n"));
1869 for (d
= display_chain
; d
; d
= d
->next
)
1871 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1873 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1875 else if (d
->format
.format
)
1876 printf_filtered ("/%c ", d
->format
.format
);
1877 puts_filtered (d
->exp_string
);
1878 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1879 printf_filtered (_(" (cannot be evaluated in the current context)"));
1880 printf_filtered ("\n");
1881 gdb_flush (gdb_stdout
);
1885 /* Callback fo map_display_numbers, that enables or disables the
1886 passed in display D. */
1889 do_enable_disable_display (struct display
*d
, void *data
)
1891 d
->enabled_p
= *(int *) data
;
1894 /* Implamentation of both the "disable display" and "enable display"
1895 commands. ENABLE decides what to do. */
1898 enable_disable_display_command (char *args
, int from_tty
, int enable
)
1905 d
->enabled_p
= enable
;
1909 map_display_numbers (args
, do_enable_disable_display
, &enable
);
1912 /* The "enable display" command. */
1915 enable_display_command (char *args
, int from_tty
)
1917 enable_disable_display_command (args
, from_tty
, 1);
1920 /* The "disable display" command. */
1923 disable_display_command (char *args
, int from_tty
)
1925 enable_disable_display_command (args
, from_tty
, 0);
1928 /* display_chain items point to blocks and expressions. Some expressions in
1929 turn may point to symbols.
1930 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1931 obstack_free'd when a shared library is unloaded.
1932 Clear pointers that are about to become dangling.
1933 Both .exp and .block fields will be restored next time we need to display
1934 an item by re-parsing .exp_string field in the new execution context. */
1937 clear_dangling_display_expressions (struct so_list
*solib
)
1939 struct objfile
*objfile
= solib
->objfile
;
1942 /* With no symbol file we cannot have a block or expression from it. */
1943 if (objfile
== NULL
)
1945 if (objfile
->separate_debug_objfile_backlink
)
1946 objfile
= objfile
->separate_debug_objfile_backlink
;
1947 gdb_assert (objfile
->pspace
== solib
->pspace
);
1949 for (d
= display_chain
; d
!= NULL
; d
= d
->next
)
1951 if (d
->pspace
!= solib
->pspace
)
1954 if (lookup_objfile_from_block (d
->block
) == objfile
1955 || (d
->exp
&& exp_uses_objfile (d
->exp
, objfile
)))
1965 /* Print the value in stack frame FRAME of a variable specified by a
1966 struct symbol. NAME is the name to print; if NULL then VAR's print
1967 name will be used. STREAM is the ui_file on which to print the
1968 value. INDENT specifies the number of indent levels to print
1969 before printing the variable name. */
1972 print_variable_and_value (const char *name
, struct symbol
*var
,
1973 struct frame_info
*frame
,
1974 struct ui_file
*stream
, int indent
)
1976 volatile struct gdb_exception except
;
1979 name
= SYMBOL_PRINT_NAME (var
);
1981 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1982 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1985 struct value_print_options opts
;
1987 val
= read_var_value (var
, frame
);
1988 get_user_print_options (&opts
);
1990 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1992 if (except
.reason
< 0)
1993 fprintf_filtered(stream
, "<error reading variable %s (%s)>", name
,
1995 fprintf_filtered (stream
, "\n");
1998 /* printf "printf format string" ARG to STREAM. */
2001 ui_printf (char *arg
, struct ui_file
*stream
)
2005 char *string
= NULL
;
2006 struct value
**val_args
;
2008 char *current_substring
;
2010 int allocated_args
= 20;
2011 struct cleanup
*old_cleanups
;
2013 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
2014 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2017 error_no_arg (_("format-control string and values to print"));
2019 s
= skip_spaces (s
);
2021 /* A format string should follow, enveloped in double quotes. */
2023 error (_("Bad format string, missing '\"'."));
2025 /* Parse the format-control string and copy it into the string STRING,
2026 processing some kinds of escape sequence. */
2028 f
= string
= (char *) alloca (strlen (s
) + 1);
2036 error (_("Bad format string, non-terminated '\"'."));
2069 /* ??? TODO: handle other escape sequences. */
2070 error (_("Unrecognized escape character \\%c in format string."),
2080 /* Skip over " and following space and comma. */
2083 s
= skip_spaces (s
);
2085 if (*s
!= ',' && *s
!= 0)
2086 error (_("Invalid argument syntax"));
2090 s
= skip_spaces (s
);
2092 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2093 substrings
= alloca (strlen (string
) * 2);
2094 current_substring
= substrings
;
2097 /* Now scan the string for %-specs and see what kinds of args they want.
2098 argclass[I] classifies the %-specs so we can give printf_filtered
2099 something of the right size. */
2103 int_arg
, long_arg
, long_long_arg
, ptr_arg
,
2104 string_arg
, wide_string_arg
, wide_char_arg
,
2105 double_arg
, long_double_arg
, decfloat_arg
2107 enum argclass
*argclass
;
2108 enum argclass this_argclass
;
2113 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2120 int seen_hash
= 0, seen_zero
= 0, lcount
= 0, seen_prec
= 0;
2121 int seen_space
= 0, seen_plus
= 0;
2122 int seen_big_l
= 0, seen_h
= 0, seen_big_h
= 0;
2123 int seen_big_d
= 0, seen_double_big_d
= 0;
2126 /* Check the validity of the format specifier, and work
2127 out what argument it expects. We only accept C89
2128 format strings, with the exception of long long (which
2129 we autoconf for). */
2131 /* Skip over "%%". */
2138 /* The first part of a format specifier is a set of flag
2140 while (strchr ("0-+ #", *f
))
2153 /* The next part of a format specifier is a width. */
2154 while (strchr ("0123456789", *f
))
2157 /* The next part of a format specifier is a precision. */
2162 while (strchr ("0123456789", *f
))
2166 /* The next part of a format specifier is a length modifier. */
2187 /* Decimal32 modifier. */
2193 /* Decimal64 and Decimal128 modifiers. */
2198 /* Check for a Decimal128. */
2202 seen_double_big_d
= 1;
2218 if (seen_space
|| seen_plus
)
2225 this_argclass
= int_arg
;
2226 else if (lcount
== 1)
2227 this_argclass
= long_arg
;
2229 this_argclass
= long_long_arg
;
2236 this_argclass
= lcount
== 0 ? int_arg
: wide_char_arg
;
2237 if (lcount
> 1 || seen_h
|| seen_big_l
)
2239 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2244 this_argclass
= ptr_arg
;
2245 if (lcount
|| seen_h
|| seen_big_l
)
2247 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2252 this_argclass
= lcount
== 0 ? string_arg
: wide_string_arg
;
2253 if (lcount
> 1 || seen_h
|| seen_big_l
)
2255 if (seen_zero
|| seen_space
|| seen_plus
)
2264 if (seen_big_h
|| seen_big_d
|| seen_double_big_d
)
2265 this_argclass
= decfloat_arg
;
2266 else if (seen_big_l
)
2267 this_argclass
= long_double_arg
;
2269 this_argclass
= double_arg
;
2271 if (lcount
|| seen_h
)
2276 error (_("`*' not supported for precision or width in printf"));
2279 error (_("Format specifier `n' not supported in printf"));
2282 error (_("Incomplete format specifier at end of format string"));
2285 error (_("Unrecognized format specifier '%c' in printf"), *f
);
2289 error (_("Inappropriate modifiers to "
2290 "format specifier '%c' in printf"),
2295 if (lcount
> 1 && USE_PRINTF_I64
)
2297 /* Windows' printf does support long long, but not the usual way.
2298 Convert %lld to %I64d. */
2299 int length_before_ll
= f
- last_arg
- 1 - lcount
;
2301 strncpy (current_substring
, last_arg
, length_before_ll
);
2302 strcpy (current_substring
+ length_before_ll
, "I64");
2303 current_substring
[length_before_ll
+ 3] =
2304 last_arg
[length_before_ll
+ lcount
];
2305 current_substring
+= length_before_ll
+ 4;
2307 else if (this_argclass
== wide_string_arg
2308 || this_argclass
== wide_char_arg
)
2310 /* Convert %ls or %lc to %s. */
2311 int length_before_ls
= f
- last_arg
- 2;
2313 strncpy (current_substring
, last_arg
, length_before_ls
);
2314 strcpy (current_substring
+ length_before_ls
, "s");
2315 current_substring
+= length_before_ls
+ 2;
2319 strncpy (current_substring
, last_arg
, f
- last_arg
);
2320 current_substring
+= f
- last_arg
;
2322 *current_substring
++ = '\0';
2324 argclass
[nargs_wanted
++] = this_argclass
;
2327 /* Now, parse all arguments and evaluate them.
2328 Store the VALUEs in VAL_ARGS. */
2334 if (nargs
== allocated_args
)
2335 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2336 (allocated_args
*= 2)
2337 * sizeof (struct value
*));
2339 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2347 if (nargs
!= nargs_wanted
)
2348 error (_("Wrong number of arguments for specified format-string"));
2350 /* Now actually print them. */
2351 current_substring
= substrings
;
2352 for (i
= 0; i
< nargs
; i
++)
2354 switch (argclass
[i
])
2362 tem
= value_as_address (val_args
[i
]);
2364 /* This is a %s argument. Find the length of the string. */
2370 read_memory (tem
+ j
, &c
, 1);
2375 /* Copy the string contents into a string inside GDB. */
2376 str
= (gdb_byte
*) alloca (j
+ 1);
2378 read_memory (tem
, str
, j
);
2381 fprintf_filtered (stream
, current_substring
, (char *) str
);
2384 case wide_string_arg
:
2389 struct gdbarch
*gdbarch
2390 = get_type_arch (value_type (val_args
[i
]));
2391 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2392 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2393 "wchar_t", NULL
, 0);
2394 int wcwidth
= TYPE_LENGTH (wctype
);
2395 gdb_byte
*buf
= alloca (wcwidth
);
2396 struct obstack output
;
2397 struct cleanup
*inner_cleanup
;
2399 tem
= value_as_address (val_args
[i
]);
2401 /* This is a %s argument. Find the length of the string. */
2402 for (j
= 0;; j
+= wcwidth
)
2405 read_memory (tem
+ j
, buf
, wcwidth
);
2406 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2410 /* Copy the string contents into a string inside GDB. */
2411 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2413 read_memory (tem
, str
, j
);
2414 memset (&str
[j
], 0, wcwidth
);
2416 obstack_init (&output
);
2417 inner_cleanup
= make_cleanup_obstack_free (&output
);
2419 convert_between_encodings (target_wide_charset (gdbarch
),
2422 &output
, translit_char
);
2423 obstack_grow_str0 (&output
, "");
2425 fprintf_filtered (stream
, current_substring
,
2426 obstack_base (&output
));
2427 do_cleanups (inner_cleanup
);
2432 struct gdbarch
*gdbarch
2433 = get_type_arch (value_type (val_args
[i
]));
2434 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2435 "wchar_t", NULL
, 0);
2436 struct type
*valtype
;
2437 struct obstack output
;
2438 struct cleanup
*inner_cleanup
;
2439 const gdb_byte
*bytes
;
2441 valtype
= value_type (val_args
[i
]);
2442 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2443 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2444 error (_("expected wchar_t argument for %%lc"));
2446 bytes
= value_contents (val_args
[i
]);
2448 obstack_init (&output
);
2449 inner_cleanup
= make_cleanup_obstack_free (&output
);
2451 convert_between_encodings (target_wide_charset (gdbarch
),
2453 bytes
, TYPE_LENGTH (valtype
),
2454 TYPE_LENGTH (valtype
),
2455 &output
, translit_char
);
2456 obstack_grow_str0 (&output
, "");
2458 fprintf_filtered (stream
, current_substring
,
2459 obstack_base (&output
));
2460 do_cleanups (inner_cleanup
);
2465 struct type
*type
= value_type (val_args
[i
]);
2469 /* If format string wants a float, unchecked-convert the value
2470 to floating point of the same size. */
2471 type
= float_type_from_length (type
);
2472 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2474 error (_("Invalid floating value found in program."));
2476 fprintf_filtered (stream
, current_substring
, (double) val
);
2479 case long_double_arg
:
2480 #ifdef HAVE_LONG_DOUBLE
2482 struct type
*type
= value_type (val_args
[i
]);
2486 /* If format string wants a float, unchecked-convert the value
2487 to floating point of the same size. */
2488 type
= float_type_from_length (type
);
2489 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2491 error (_("Invalid floating value found in program."));
2493 fprintf_filtered (stream
, current_substring
,
2498 error (_("long double not supported in printf"));
2501 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2503 long long val
= value_as_long (val_args
[i
]);
2505 fprintf_filtered (stream
, current_substring
, val
);
2509 error (_("long long not supported in printf"));
2513 int val
= value_as_long (val_args
[i
]);
2515 fprintf_filtered (stream
, current_substring
, val
);
2520 long val
= value_as_long (val_args
[i
]);
2522 fprintf_filtered (stream
, current_substring
, val
);
2526 /* Handles decimal floating values. */
2529 const gdb_byte
*param_ptr
= value_contents (val_args
[i
]);
2531 #if defined (PRINTF_HAS_DECFLOAT)
2532 /* If we have native support for Decimal floating
2533 printing, handle it here. */
2534 fprintf_filtered (stream
, current_substring
, param_ptr
);
2537 /* As a workaround until vasprintf has native support for DFP
2538 we convert the DFP values to string and print them using
2539 the %s format specifier. */
2542 int nnull_chars
= 0;
2544 /* Parameter data. */
2545 struct type
*param_type
= value_type (val_args
[i
]);
2546 unsigned int param_len
= TYPE_LENGTH (param_type
);
2547 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2548 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2550 /* DFP output data. */
2551 struct value
*dfp_value
= NULL
;
2555 struct type
*dfp_type
= NULL
;
2556 char decstr
[MAX_DECIMAL_STRING
];
2558 /* Points to the end of the string so that we can go back
2559 and check for DFP length modifiers. */
2560 eos
= current_substring
+ strlen (current_substring
);
2562 /* Look for the float/double format specifier. */
2563 while (*eos
!= 'f' && *eos
!= 'e' && *eos
!= 'E'
2564 && *eos
!= 'g' && *eos
!= 'G')
2569 /* Search for the '%' char and extract the size and type of
2570 the output decimal value based on its modifiers
2571 (%Hf, %Df, %DDf). */
2572 while (*--sos
!= '%')
2577 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2579 else if (*sos
== 'D' && *(sos
- 1) == 'D')
2582 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2588 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2592 /* Replace %Hf, %Df and %DDf with %s's. */
2595 /* Go through the whole format string and pull the correct
2596 number of chars back to compensate for the change in the
2597 format specifier. */
2598 while (nnull_chars
< nargs
- i
)
2606 /* Conversion between different DFP types. */
2607 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2608 decimal_convert (param_ptr
, param_len
, byte_order
,
2609 dec
, dfp_len
, byte_order
);
2611 /* If this is a non-trivial conversion, just output 0.
2612 A correct converted value can be displayed by explicitly
2613 casting to a DFP type. */
2614 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2616 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2618 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2620 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2622 /* Print the DFP value. */
2623 fprintf_filtered (stream
, current_substring
, decstr
);
2631 /* We avoid the host's %p because pointers are too
2632 likely to be the wrong size. The only interesting
2633 modifier for %p is a width; extract that, and then
2634 handle %p as glibc would: %#x or a literal "(nil)". */
2636 char *p
, *fmt
, *fmt_p
;
2637 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2638 long long val
= value_as_long (val_args
[i
]);
2640 long val
= value_as_long (val_args
[i
]);
2643 fmt
= alloca (strlen (current_substring
) + 5);
2645 /* Copy up to the leading %. */
2646 p
= current_substring
;
2650 int is_percent
= (*p
== '%');
2665 /* Copy any width. */
2666 while (*p
>= '0' && *p
< '9')
2669 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2672 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2678 fprintf_filtered (stream
, fmt
, val
);
2684 fprintf_filtered (stream
, fmt
, "(nil)");
2690 internal_error (__FILE__
, __LINE__
,
2691 _("failed internal consistency check"));
2693 /* Skip to the next substring. */
2694 current_substring
+= strlen (current_substring
) + 1;
2696 /* Print the portion of the format string after the last argument.
2697 Note that this will not include any ordinary %-specs, but it
2698 might include "%%". That is why we use printf_filtered and not
2699 puts_filtered here. Also, we pass a dummy argument because
2700 some platforms have modified GCC to include -Wformat-security
2701 by default, which will warn here if there is no argument. */
2702 fprintf_filtered (stream
, last_arg
, 0);
2704 do_cleanups (old_cleanups
);
2707 /* Implement the "printf" command. */
2710 printf_command (char *arg
, int from_tty
)
2712 ui_printf (arg
, gdb_stdout
);
2715 /* Implement the "eval" command. */
2718 eval_command (char *arg
, int from_tty
)
2720 struct ui_file
*ui_out
= mem_fileopen ();
2721 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (ui_out
);
2724 ui_printf (arg
, ui_out
);
2726 expanded
= ui_file_xstrdup (ui_out
, NULL
);
2727 make_cleanup (xfree
, expanded
);
2729 execute_command (expanded
, from_tty
);
2731 do_cleanups (cleanups
);
2735 _initialize_printcmd (void)
2737 struct cmd_list_element
*c
;
2739 current_display_number
= -1;
2741 observer_attach_solib_unloaded (clear_dangling_display_expressions
);
2743 add_info ("address", address_info
,
2744 _("Describe where symbol SYM is stored."));
2746 add_info ("symbol", sym_info
, _("\
2747 Describe what symbol is at location ADDR.\n\
2748 Only for symbols with fixed locations (global or static scope)."));
2750 add_com ("x", class_vars
, x_command
, _("\
2751 Examine memory: x/FMT ADDRESS.\n\
2752 ADDRESS is an expression for the memory address to examine.\n\
2753 FMT is a repeat count followed by a format letter and a size letter.\n\
2754 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2755 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2756 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2757 The specified number of objects of the specified size are printed\n\
2758 according to the format.\n\n\
2759 Defaults for format and size letters are those previously used.\n\
2760 Default count is 1. Default address is following last thing printed\n\
2761 with this command or \"print\"."));
2764 add_com ("whereis", class_vars
, whereis_command
,
2765 _("Print line number and file of definition of variable."));
2768 add_info ("display", display_info
, _("\
2769 Expressions to display when program stops, with code numbers."));
2771 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2772 Cancel some expressions to be displayed when program stops.\n\
2773 Arguments are the code numbers of the expressions to stop displaying.\n\
2774 No argument means cancel all automatic-display expressions.\n\
2775 \"delete display\" has the same effect as this command.\n\
2776 Do \"info display\" to see current list of code numbers."),
2779 add_com ("display", class_vars
, display_command
, _("\
2780 Print value of expression EXP each time the program stops.\n\
2781 /FMT may be used before EXP as in the \"print\" command.\n\
2782 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2783 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2784 and examining is done as in the \"x\" command.\n\n\
2785 With no argument, display all currently requested auto-display expressions.\n\
2786 Use \"undisplay\" to cancel display requests previously made."));
2788 add_cmd ("display", class_vars
, enable_display_command
, _("\
2789 Enable some expressions to be displayed when program stops.\n\
2790 Arguments are the code numbers of the expressions to resume displaying.\n\
2791 No argument means enable all automatic-display expressions.\n\
2792 Do \"info display\" to see current list of code numbers."), &enablelist
);
2794 add_cmd ("display", class_vars
, disable_display_command
, _("\
2795 Disable some expressions to be displayed when program stops.\n\
2796 Arguments are the code numbers of the expressions to stop displaying.\n\
2797 No argument means disable all automatic-display expressions.\n\
2798 Do \"info display\" to see current list of code numbers."), &disablelist
);
2800 add_cmd ("display", class_vars
, undisplay_command
, _("\
2801 Cancel some expressions to be displayed when program stops.\n\
2802 Arguments are the code numbers of the expressions to stop displaying.\n\
2803 No argument means cancel all automatic-display expressions.\n\
2804 Do \"info display\" to see current list of code numbers."), &deletelist
);
2806 add_com ("printf", class_vars
, printf_command
, _("\
2807 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2808 This is useful for formatted output in user-defined commands."));
2810 add_com ("output", class_vars
, output_command
, _("\
2811 Like \"print\" but don't put in value history and don't print newline.\n\
2812 This is useful in user-defined commands."));
2814 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2815 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2816 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2817 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2818 with $), a register (a few standard names starting with $), or an actual\n\
2819 variable in the program being debugged. EXP is any valid expression.\n\
2820 Use \"set variable\" for variables with names identical to set subcommands.\n\
2822 With a subcommand, this command modifies parts of the gdb environment.\n\
2823 You can see these environment settings with the \"show\" command."),
2824 &setlist
, "set ", 1, &cmdlist
);
2826 add_com ("assign", class_vars
, set_command
, _("\
2827 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2828 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2829 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2830 with $), a register (a few standard names starting with $), or an actual\n\
2831 variable in the program being debugged. EXP is any valid expression.\n\
2832 Use \"set variable\" for variables with names identical to set subcommands.\n\
2833 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2834 You can see these environment settings with the \"show\" command."));
2836 /* "call" is the same as "set", but handy for dbx users to call fns. */
2837 c
= add_com ("call", class_vars
, call_command
, _("\
2838 Call a function in the program.\n\
2839 The argument is the function name and arguments, in the notation of the\n\
2840 current working language. The result is printed and saved in the value\n\
2841 history, if it is not void."));
2842 set_cmd_completer (c
, expression_completer
);
2844 add_cmd ("variable", class_vars
, set_command
, _("\
2845 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2846 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2847 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2848 with $), a register (a few standard names starting with $), or an actual\n\
2849 variable in the program being debugged. EXP is any valid expression.\n\
2850 This may usually be abbreviated to simply \"set\"."),
2853 c
= add_com ("print", class_vars
, print_command
, _("\
2854 Print value of expression EXP.\n\
2855 Variables accessible are those of the lexical environment of the selected\n\
2856 stack frame, plus all those whose scope is global or an entire file.\n\
2858 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2859 $$NUM refers to NUM'th value back from the last one.\n\
2860 Names starting with $ refer to registers (with the values they would have\n\
2861 if the program were to return to the stack frame now selected, restoring\n\
2862 all registers saved by frames farther in) or else to debugger\n\
2863 \"convenience\" variables (any such name not a known register).\n\
2864 Use assignment expressions to give values to convenience variables.\n\
2866 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2867 @ is a binary operator for treating consecutive data objects\n\
2868 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2869 element is FOO, whose second element is stored in the space following\n\
2870 where FOO is stored, etc. FOO must be an expression whose value\n\
2871 resides in memory.\n\
2873 EXP may be preceded with /FMT, where FMT is a format letter\n\
2874 but no count or size letter (see \"x\" command)."));
2875 set_cmd_completer (c
, expression_completer
);
2876 add_com_alias ("p", "print", class_vars
, 1);
2878 c
= add_com ("inspect", class_vars
, inspect_command
, _("\
2879 Same as \"print\" command, except that if you are running in the epoch\n\
2880 environment, the value is printed in its own window."));
2881 set_cmd_completer (c
, expression_completer
);
2883 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2884 &max_symbolic_offset
, _("\
2885 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2886 Show the largest offset that will be printed in <symbol+1234> form."), NULL
,
2888 show_max_symbolic_offset
,
2889 &setprintlist
, &showprintlist
);
2890 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2891 &print_symbol_filename
, _("\
2892 Set printing of source filename and line number with <symbol>."), _("\
2893 Show printing of source filename and line number with <symbol>."), NULL
,
2895 show_print_symbol_filename
,
2896 &setprintlist
, &showprintlist
);
2898 add_com ("eval", no_class
, eval_command
, _("\
2899 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2900 a command line, and call it."));