1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986-2014 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/>. */
26 #include "expression.h"
30 #include "breakpoint.h"
32 #include "gdb-demangle.h"
35 #include "symfile.h" /* for overlay functions */
36 #include "objfiles.h" /* ditto */
37 #include "completer.h" /* for completion functions */
44 #include "parser-defs.h"
46 #include "arch-utils.h"
47 #include "cli/cli-utils.h"
52 #include "tui/tui.h" /* For tui_active et al. */
61 /* True if the value should be printed raw -- that is, bypassing
62 python-based formatters. */
66 /* Last specified output format. */
68 static char last_format
= 0;
70 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
72 static char last_size
= 'w';
74 /* Default address to examine next, and associated architecture. */
76 static struct gdbarch
*next_gdbarch
;
77 static CORE_ADDR next_address
;
79 /* Number of delay instructions following current disassembled insn. */
81 static int branch_delay_insns
;
83 /* Last address examined. */
85 static CORE_ADDR last_examine_address
;
87 /* Contents of last address examined.
88 This is not valid past the end of the `x' command! */
90 static struct value
*last_examine_value
;
92 /* Largest offset between a symbolic value and an address, that will be
93 printed as `0x1234 <symbol+offset>'. */
95 static unsigned int max_symbolic_offset
= UINT_MAX
;
97 show_max_symbolic_offset (struct ui_file
*file
, int from_tty
,
98 struct cmd_list_element
*c
, const char *value
)
100 fprintf_filtered (file
,
101 _("The largest offset that will be "
102 "printed in <symbol+1234> form is %s.\n"),
106 /* Append the source filename and linenumber of the symbol when
107 printing a symbolic value as `<symbol at filename:linenum>' if set. */
108 static int print_symbol_filename
= 0;
110 show_print_symbol_filename (struct ui_file
*file
, int from_tty
,
111 struct cmd_list_element
*c
, const char *value
)
113 fprintf_filtered (file
, _("Printing of source filename and "
114 "line number with <symbol> is %s.\n"),
118 /* Number of auto-display expression currently being displayed.
119 So that we can disable it if we get a signal within it.
120 -1 when not doing one. */
122 static int current_display_number
;
126 /* Chain link to next auto-display item. */
127 struct display
*next
;
129 /* The expression as the user typed it. */
132 /* Expression to be evaluated and displayed. */
133 struct expression
*exp
;
135 /* Item number of this auto-display item. */
138 /* Display format specified. */
139 struct format_data format
;
141 /* Program space associated with `block'. */
142 struct program_space
*pspace
;
144 /* Innermost block required by this expression when evaluated. */
145 const struct block
*block
;
147 /* Status of this display (enabled or disabled). */
151 /* Chain of expressions whose values should be displayed
152 automatically each time the program stops. */
154 static struct display
*display_chain
;
156 static int display_number
;
158 /* Walk the following statement or block through all displays.
159 ALL_DISPLAYS_SAFE does so even if the statement deletes the current
162 #define ALL_DISPLAYS(B) \
163 for (B = display_chain; B; B = B->next)
165 #define ALL_DISPLAYS_SAFE(B,TMP) \
166 for (B = display_chain; \
167 B ? (TMP = B->next, 1): 0; \
170 /* Prototypes for exported functions. */
172 void _initialize_printcmd (void);
174 /* Prototypes for local functions. */
176 static void do_one_display (struct display
*);
179 /* Decode a format specification. *STRING_PTR should point to it.
180 OFORMAT and OSIZE are used as defaults for the format and size
181 if none are given in the format specification.
182 If OSIZE is zero, then the size field of the returned value
183 should be set only if a size is explicitly specified by the
185 The structure returned describes all the data
186 found in the specification. In addition, *STRING_PTR is advanced
187 past the specification and past all whitespace following it. */
189 static struct format_data
190 decode_format (const char **string_ptr
, int oformat
, int osize
)
192 struct format_data val
;
193 const char *p
= *string_ptr
;
200 if (*p
>= '0' && *p
<= '9')
201 val
.count
= atoi (p
);
202 while (*p
>= '0' && *p
<= '9')
205 /* Now process size or format letters that follow. */
209 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
216 else if (*p
>= 'a' && *p
<= 'z')
222 while (*p
== ' ' || *p
== '\t')
226 /* Set defaults for format and size if not specified. */
227 if (val
.format
== '?')
231 /* Neither has been specified. */
232 val
.format
= oformat
;
236 /* If a size is specified, any format makes a reasonable
237 default except 'i'. */
238 val
.format
= oformat
== 'i' ? 'x' : oformat
;
240 else if (val
.size
== '?')
244 /* Pick the appropriate size for an address. This is deferred
245 until do_examine when we know the actual architecture to use.
246 A special size value of 'a' is used to indicate this case. */
247 val
.size
= osize
? 'a' : osize
;
250 /* Floating point has to be word or giantword. */
251 if (osize
== 'w' || osize
== 'g')
254 /* Default it to giantword if the last used size is not
256 val
.size
= osize
? 'g' : osize
;
259 /* Characters default to one byte. */
260 val
.size
= osize
? 'b' : osize
;
263 /* Display strings with byte size chars unless explicitly
269 /* The default is the size most recently specified. */
276 /* Print value VAL on stream according to OPTIONS.
277 Do not end with a newline.
278 SIZE is the letter for the size of datum being printed.
279 This is used to pad hex numbers so they line up. SIZE is 0
280 for print / output and set for examine. */
283 print_formatted (struct value
*val
, int size
,
284 const struct value_print_options
*options
,
285 struct ui_file
*stream
)
287 struct type
*type
= check_typedef (value_type (val
));
288 int len
= TYPE_LENGTH (type
);
290 if (VALUE_LVAL (val
) == lval_memory
)
291 next_address
= value_address (val
) + len
;
295 switch (options
->format
)
299 struct type
*elttype
= value_type (val
);
301 next_address
= (value_address (val
)
302 + val_print_string (elttype
, NULL
,
303 value_address (val
), -1,
304 stream
, options
) * len
);
309 /* We often wrap here if there are long symbolic names. */
311 next_address
= (value_address (val
)
312 + gdb_print_insn (get_type_arch (type
),
313 value_address (val
), stream
,
314 &branch_delay_insns
));
319 if (options
->format
== 0 || options
->format
== 's'
320 || TYPE_CODE (type
) == TYPE_CODE_REF
321 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
322 || TYPE_CODE (type
) == TYPE_CODE_STRING
323 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
324 || TYPE_CODE (type
) == TYPE_CODE_UNION
325 || TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
326 value_print (val
, stream
, options
);
328 /* User specified format, so don't look to the type to tell us
330 val_print_scalar_formatted (type
,
331 value_contents_for_printing (val
),
332 value_embedded_offset (val
),
334 options
, size
, stream
);
337 /* Return builtin floating point type of same length as TYPE.
338 If no such type is found, return TYPE itself. */
340 float_type_from_length (struct type
*type
)
342 struct gdbarch
*gdbarch
= get_type_arch (type
);
343 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
345 if (TYPE_LENGTH (type
) == TYPE_LENGTH (builtin
->builtin_float
))
346 type
= builtin
->builtin_float
;
347 else if (TYPE_LENGTH (type
) == TYPE_LENGTH (builtin
->builtin_double
))
348 type
= builtin
->builtin_double
;
349 else if (TYPE_LENGTH (type
) == TYPE_LENGTH (builtin
->builtin_long_double
))
350 type
= builtin
->builtin_long_double
;
355 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
356 according to OPTIONS and SIZE on STREAM. Formats s and i are not
357 supported at this level. */
360 print_scalar_formatted (const void *valaddr
, struct type
*type
,
361 const struct value_print_options
*options
,
362 int size
, struct ui_file
*stream
)
364 struct gdbarch
*gdbarch
= get_type_arch (type
);
365 LONGEST val_long
= 0;
366 unsigned int len
= TYPE_LENGTH (type
);
367 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
369 /* String printing should go through val_print_scalar_formatted. */
370 gdb_assert (options
->format
!= 's');
372 if (len
> sizeof(LONGEST
) &&
373 (TYPE_CODE (type
) == TYPE_CODE_INT
374 || TYPE_CODE (type
) == TYPE_CODE_ENUM
))
376 switch (options
->format
)
379 print_octal_chars (stream
, valaddr
, len
, byte_order
);
383 print_decimal_chars (stream
, valaddr
, len
, byte_order
);
386 print_binary_chars (stream
, valaddr
, len
, byte_order
);
389 print_hex_chars (stream
, valaddr
, len
, byte_order
);
392 print_char_chars (stream
, type
, valaddr
, len
, byte_order
);
399 if (options
->format
!= 'f')
400 val_long
= unpack_long (type
, valaddr
);
402 /* If the value is a pointer, and pointers and addresses are not the
403 same, then at this point, the value's length (in target bytes) is
404 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
405 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
406 len
= gdbarch_addr_bit (gdbarch
) / TARGET_CHAR_BIT
;
408 /* If we are printing it as unsigned, truncate it in case it is actually
409 a negative signed value (e.g. "print/u (short)-1" should print 65535
410 (if shorts are 16 bits) instead of 4294967295). */
411 if (options
->format
!= 'd' || TYPE_UNSIGNED (type
))
413 if (len
< sizeof (LONGEST
))
414 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
417 switch (options
->format
)
422 /* No size specified, like in print. Print varying # of digits. */
423 print_longest (stream
, 'x', 1, val_long
);
432 print_longest (stream
, size
, 1, val_long
);
435 error (_("Undefined output size \"%c\"."), size
);
440 print_longest (stream
, 'd', 1, val_long
);
444 print_longest (stream
, 'u', 0, val_long
);
449 print_longest (stream
, 'o', 1, val_long
);
451 fprintf_filtered (stream
, "0");
456 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
458 print_address (gdbarch
, addr
, stream
);
464 struct value_print_options opts
= *options
;
467 if (TYPE_UNSIGNED (type
))
468 type
= builtin_type (gdbarch
)->builtin_true_unsigned_char
;
470 type
= builtin_type (gdbarch
)->builtin_true_char
;
472 value_print (value_from_longest (type
, val_long
), stream
, &opts
);
477 type
= float_type_from_length (type
);
478 print_floating (valaddr
, type
, stream
);
482 internal_error (__FILE__
, __LINE__
,
483 _("failed internal consistency check"));
486 /* Binary; 't' stands for "two". */
488 char bits
[8 * (sizeof val_long
) + 1];
489 char buf
[8 * (sizeof val_long
) + 32];
494 width
= 8 * (sizeof val_long
);
511 error (_("Undefined output size \"%c\"."), size
);
517 bits
[width
] = (val_long
& 1) ? '1' : '0';
522 while (*cp
&& *cp
== '0')
527 strncpy (buf
, cp
, sizeof (bits
));
528 fputs_filtered (buf
, stream
);
533 print_hex_chars (stream
, valaddr
, len
, byte_order
);
537 error (_("Undefined output format \"%c\"."), options
->format
);
541 /* Specify default address for `x' command.
542 The `info lines' command uses this. */
545 set_next_address (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
547 struct type
*ptr_type
= builtin_type (gdbarch
)->builtin_data_ptr
;
549 next_gdbarch
= gdbarch
;
552 /* Make address available to the user as $_. */
553 set_internalvar (lookup_internalvar ("_"),
554 value_from_pointer (ptr_type
, addr
));
557 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
558 after LEADIN. Print nothing if no symbolic name is found nearby.
559 Optionally also print source file and line number, if available.
560 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
561 or to interpret it as a possible C++ name and convert it back to source
562 form. However note that DO_DEMANGLE can be overridden by the specific
563 settings of the demangle and asm_demangle variables. Returns
564 non-zero if anything was printed; zero otherwise. */
567 print_address_symbolic (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
568 struct ui_file
*stream
,
569 int do_demangle
, char *leadin
)
572 char *filename
= NULL
;
577 /* Throw away both name and filename. */
578 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
579 make_cleanup (free_current_contents
, &filename
);
581 if (build_address_symbolic (gdbarch
, addr
, do_demangle
, &name
, &offset
,
582 &filename
, &line
, &unmapped
))
584 do_cleanups (cleanup_chain
);
588 fputs_filtered (leadin
, stream
);
590 fputs_filtered ("<*", stream
);
592 fputs_filtered ("<", stream
);
593 fputs_filtered (name
, stream
);
595 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
597 /* Append source filename and line number if desired. Give specific
598 line # of this addr, if we have it; else line # of the nearest symbol. */
599 if (print_symbol_filename
&& filename
!= NULL
)
602 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
604 fprintf_filtered (stream
, " in %s", filename
);
607 fputs_filtered ("*>", stream
);
609 fputs_filtered (">", stream
);
611 do_cleanups (cleanup_chain
);
615 /* Given an address ADDR return all the elements needed to print the
616 address in a symbolic form. NAME can be mangled or not depending
617 on DO_DEMANGLE (and also on the asm_demangle global variable,
618 manipulated via ''set print asm-demangle''). Return 0 in case of
619 success, when all the info in the OUT paramters is valid. Return 1
622 build_address_symbolic (struct gdbarch
*gdbarch
,
623 CORE_ADDR addr
, /* IN */
624 int do_demangle
, /* IN */
625 char **name
, /* OUT */
626 int *offset
, /* OUT */
627 char **filename
, /* OUT */
629 int *unmapped
) /* OUT */
631 struct bound_minimal_symbol msymbol
;
632 struct symbol
*symbol
;
633 CORE_ADDR name_location
= 0;
634 struct obj_section
*section
= NULL
;
635 const char *name_temp
= "";
637 /* Let's say it is mapped (not unmapped). */
640 /* Determine if the address is in an overlay, and whether it is
642 if (overlay_debugging
)
644 section
= find_pc_overlay (addr
);
645 if (pc_in_unmapped_range (addr
, section
))
648 addr
= overlay_mapped_address (addr
, section
);
652 /* First try to find the address in the symbol table, then
653 in the minsyms. Take the closest one. */
655 /* This is defective in the sense that it only finds text symbols. So
656 really this is kind of pointless--we should make sure that the
657 minimal symbols have everything we need (by changing that we could
658 save some memory, but for many debug format--ELF/DWARF or
659 anything/stabs--it would be inconvenient to eliminate those minimal
661 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
662 symbol
= find_pc_sect_function (addr
, section
);
666 /* If this is a function (i.e. a code address), strip out any
667 non-address bits. For instance, display a pointer to the
668 first instruction of a Thumb function as <function>; the
669 second instruction will be <function+2>, even though the
670 pointer is <function+3>. This matches the ISA behavior. */
671 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
673 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
674 if (do_demangle
|| asm_demangle
)
675 name_temp
= SYMBOL_PRINT_NAME (symbol
);
677 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
680 if (msymbol
.minsym
!= NULL
681 && MSYMBOL_HAS_SIZE (msymbol
.minsym
)
682 && MSYMBOL_SIZE (msymbol
.minsym
) == 0
683 && MSYMBOL_TYPE (msymbol
.minsym
) != mst_text
684 && MSYMBOL_TYPE (msymbol
.minsym
) != mst_text_gnu_ifunc
685 && MSYMBOL_TYPE (msymbol
.minsym
) != mst_file_text
)
686 msymbol
.minsym
= NULL
;
688 if (msymbol
.minsym
!= NULL
)
690 if (BMSYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
692 /* If this is a function (i.e. a code address), strip out any
693 non-address bits. For instance, display a pointer to the
694 first instruction of a Thumb function as <function>; the
695 second instruction will be <function+2>, even though the
696 pointer is <function+3>. This matches the ISA behavior. */
697 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_text
698 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_text_gnu_ifunc
699 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_text
700 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
701 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
703 /* The msymbol is closer to the address than the symbol;
704 use the msymbol instead. */
706 name_location
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
707 if (do_demangle
|| asm_demangle
)
708 name_temp
= MSYMBOL_PRINT_NAME (msymbol
.minsym
);
710 name_temp
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
713 if (symbol
== NULL
&& msymbol
.minsym
== NULL
)
716 /* If the nearest symbol is too far away, don't print anything symbolic. */
718 /* For when CORE_ADDR is larger than unsigned int, we do math in
719 CORE_ADDR. But when we detect unsigned wraparound in the
720 CORE_ADDR math, we ignore this test and print the offset,
721 because addr+max_symbolic_offset has wrapped through the end
722 of the address space back to the beginning, giving bogus comparison. */
723 if (addr
> name_location
+ max_symbolic_offset
724 && name_location
+ max_symbolic_offset
> name_location
)
727 *offset
= addr
- name_location
;
729 *name
= xstrdup (name_temp
);
731 if (print_symbol_filename
)
733 struct symtab_and_line sal
;
735 sal
= find_pc_sect_line (addr
, section
, 0);
739 *filename
= xstrdup (symtab_to_filename_for_display (sal
.symtab
));
747 /* Print address ADDR symbolically on STREAM.
748 First print it as a number. Then perhaps print
749 <SYMBOL + OFFSET> after the number. */
752 print_address (struct gdbarch
*gdbarch
,
753 CORE_ADDR addr
, struct ui_file
*stream
)
755 fputs_filtered (paddress (gdbarch
, addr
), stream
);
756 print_address_symbolic (gdbarch
, addr
, stream
, asm_demangle
, " ");
759 /* Return a prefix for instruction address:
760 "=> " for current instruction, else " ". */
763 pc_prefix (CORE_ADDR addr
)
765 if (has_stack_frames ())
767 struct frame_info
*frame
;
770 frame
= get_selected_frame (NULL
);
771 if (get_frame_pc_if_available (frame
, &pc
) && pc
== addr
)
777 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
778 controls whether to print the symbolic name "raw" or demangled.
779 Return non-zero if anything was printed; zero otherwise. */
782 print_address_demangle (const struct value_print_options
*opts
,
783 struct gdbarch
*gdbarch
, CORE_ADDR addr
,
784 struct ui_file
*stream
, int do_demangle
)
786 if (opts
->addressprint
)
788 fputs_filtered (paddress (gdbarch
, addr
), stream
);
789 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, " ");
793 return print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, "");
799 /* Examine data at address ADDR in format FMT.
800 Fetch it from memory and print on gdb_stdout. */
803 do_examine (struct format_data fmt
, struct gdbarch
*gdbarch
, CORE_ADDR addr
)
808 struct type
*val_type
= NULL
;
811 struct value_print_options opts
;
816 next_gdbarch
= gdbarch
;
819 /* Instruction format implies fetch single bytes
820 regardless of the specified size.
821 The case of strings is handled in decode_format, only explicit
822 size operator are not changed to 'b'. */
828 /* Pick the appropriate size for an address. */
829 if (gdbarch_ptr_bit (next_gdbarch
) == 64)
831 else if (gdbarch_ptr_bit (next_gdbarch
) == 32)
833 else if (gdbarch_ptr_bit (next_gdbarch
) == 16)
836 /* Bad value for gdbarch_ptr_bit. */
837 internal_error (__FILE__
, __LINE__
,
838 _("failed internal consistency check"));
842 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
843 else if (size
== 'h')
844 val_type
= builtin_type (next_gdbarch
)->builtin_int16
;
845 else if (size
== 'w')
846 val_type
= builtin_type (next_gdbarch
)->builtin_int32
;
847 else if (size
== 'g')
848 val_type
= builtin_type (next_gdbarch
)->builtin_int64
;
852 struct type
*char_type
= NULL
;
854 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
855 if type is not found. */
857 char_type
= builtin_type (next_gdbarch
)->builtin_char16
;
858 else if (size
== 'w')
859 char_type
= builtin_type (next_gdbarch
)->builtin_char32
;
861 val_type
= char_type
;
864 if (size
!= '\0' && size
!= 'b')
865 warning (_("Unable to display strings with "
866 "size '%c', using 'b' instead."), size
);
868 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
877 if (format
== 's' || format
== 'i')
880 get_formatted_print_options (&opts
, format
);
882 /* Print as many objects as specified in COUNT, at most maxelts per line,
883 with the address of the next one at the start of each line. */
889 fputs_filtered (pc_prefix (next_address
), gdb_stdout
);
890 print_address (next_gdbarch
, next_address
, gdb_stdout
);
891 printf_filtered (":");
896 printf_filtered ("\t");
897 /* Note that print_formatted sets next_address for the next
899 last_examine_address
= next_address
;
901 if (last_examine_value
)
902 value_free (last_examine_value
);
904 /* The value to be displayed is not fetched greedily.
905 Instead, to avoid the possibility of a fetched value not
906 being used, its retrieval is delayed until the print code
907 uses it. When examining an instruction stream, the
908 disassembler will perform its own memory fetch using just
909 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
910 the disassembler be modified so that LAST_EXAMINE_VALUE
911 is left with the byte sequence from the last complete
912 instruction fetched from memory? */
913 last_examine_value
= value_at_lazy (val_type
, next_address
);
915 if (last_examine_value
)
916 release_value (last_examine_value
);
918 print_formatted (last_examine_value
, size
, &opts
, gdb_stdout
);
920 /* Display any branch delay slots following the final insn. */
921 if (format
== 'i' && count
== 1)
922 count
+= branch_delay_insns
;
924 printf_filtered ("\n");
925 gdb_flush (gdb_stdout
);
930 validate_format (struct format_data fmt
, char *cmdname
)
933 error (_("Size letters are meaningless in \"%s\" command."), cmdname
);
935 error (_("Item count other than 1 is meaningless in \"%s\" command."),
937 if (fmt
.format
== 'i')
938 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
939 fmt
.format
, cmdname
);
942 /* Evaluate string EXP as an expression in the current language and
943 print the resulting value. EXP may contain a format specifier as the
944 first argument ("/x myvar" for example, to print myvar in hex). */
947 print_command_1 (const char *exp
, int voidprint
)
949 struct expression
*expr
;
950 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
953 struct format_data fmt
;
955 if (exp
&& *exp
== '/')
958 fmt
= decode_format (&exp
, last_format
, 0);
959 validate_format (fmt
, "print");
960 last_format
= format
= fmt
.format
;
972 expr
= parse_expression (exp
);
973 make_cleanup (free_current_contents
, &expr
);
974 val
= evaluate_expression (expr
);
977 val
= access_value_history (0);
979 if (voidprint
|| (val
&& value_type (val
) &&
980 TYPE_CODE (value_type (val
)) != TYPE_CODE_VOID
))
982 struct value_print_options opts
;
983 int histindex
= record_latest_value (val
);
985 annotate_value_history_begin (histindex
, value_type (val
));
987 printf_filtered ("$%d = ", histindex
);
989 annotate_value_history_value ();
991 get_formatted_print_options (&opts
, format
);
994 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
995 printf_filtered ("\n");
997 annotate_value_history_end ();
1000 do_cleanups (old_chain
);
1004 print_command (char *exp
, int from_tty
)
1006 print_command_1 (exp
, 1);
1009 /* Same as print, except it doesn't print void results. */
1011 call_command (char *exp
, int from_tty
)
1013 print_command_1 (exp
, 0);
1016 /* Implementation of the "output" command. */
1019 output_command (char *exp
, int from_tty
)
1021 output_command_const (exp
, from_tty
);
1024 /* Like output_command, but takes a const string as argument. */
1027 output_command_const (const char *exp
, int from_tty
)
1029 struct expression
*expr
;
1030 struct cleanup
*old_chain
;
1033 struct format_data fmt
;
1034 struct value_print_options opts
;
1039 if (exp
&& *exp
== '/')
1042 fmt
= decode_format (&exp
, 0, 0);
1043 validate_format (fmt
, "output");
1044 format
= fmt
.format
;
1047 expr
= parse_expression (exp
);
1048 old_chain
= make_cleanup (free_current_contents
, &expr
);
1050 val
= evaluate_expression (expr
);
1052 annotate_value_begin (value_type (val
));
1054 get_formatted_print_options (&opts
, format
);
1056 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
1058 annotate_value_end ();
1061 gdb_flush (gdb_stdout
);
1063 do_cleanups (old_chain
);
1067 set_command (char *exp
, int from_tty
)
1069 struct expression
*expr
= parse_expression (exp
);
1070 struct cleanup
*old_chain
=
1071 make_cleanup (free_current_contents
, &expr
);
1073 if (expr
->nelts
>= 1)
1074 switch (expr
->elts
[0].opcode
)
1076 case UNOP_PREINCREMENT
:
1077 case UNOP_POSTINCREMENT
:
1078 case UNOP_PREDECREMENT
:
1079 case UNOP_POSTDECREMENT
:
1081 case BINOP_ASSIGN_MODIFY
:
1086 (_("Expression is not an assignment (and might have no effect)"));
1089 evaluate_expression (expr
);
1090 do_cleanups (old_chain
);
1094 sym_info (char *arg
, int from_tty
)
1096 struct minimal_symbol
*msymbol
;
1097 struct objfile
*objfile
;
1098 struct obj_section
*osect
;
1099 CORE_ADDR addr
, sect_addr
;
1101 unsigned int offset
;
1104 error_no_arg (_("address"));
1106 addr
= parse_and_eval_address (arg
);
1107 ALL_OBJSECTIONS (objfile
, osect
)
1109 /* Only process each object file once, even if there's a separate
1111 if (objfile
->separate_debug_objfile_backlink
)
1114 sect_addr
= overlay_mapped_address (addr
, osect
);
1116 if (obj_section_addr (osect
) <= sect_addr
1117 && sect_addr
< obj_section_endaddr (osect
)
1119 = lookup_minimal_symbol_by_pc_section (sect_addr
, osect
).minsym
))
1121 const char *obj_name
, *mapped
, *sec_name
, *msym_name
;
1123 struct cleanup
*old_chain
;
1126 offset
= sect_addr
- MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
);
1127 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1128 sec_name
= osect
->the_bfd_section
->name
;
1129 msym_name
= MSYMBOL_PRINT_NAME (msymbol
);
1131 /* Don't print the offset if it is zero.
1132 We assume there's no need to handle i18n of "sym + offset". */
1134 loc_string
= xstrprintf ("%s + %u", msym_name
, offset
);
1136 loc_string
= xstrprintf ("%s", msym_name
);
1138 /* Use a cleanup to free loc_string in case the user quits
1139 a pagination request inside printf_filtered. */
1140 old_chain
= make_cleanup (xfree
, loc_string
);
1142 gdb_assert (osect
->objfile
&& objfile_name (osect
->objfile
));
1143 obj_name
= objfile_name (osect
->objfile
);
1145 if (MULTI_OBJFILE_P ())
1146 if (pc_in_unmapped_range (addr
, osect
))
1147 if (section_is_overlay (osect
))
1148 printf_filtered (_("%s in load address range of "
1149 "%s overlay section %s of %s\n"),
1150 loc_string
, mapped
, sec_name
, obj_name
);
1152 printf_filtered (_("%s in load address range of "
1153 "section %s of %s\n"),
1154 loc_string
, sec_name
, obj_name
);
1156 if (section_is_overlay (osect
))
1157 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1158 loc_string
, mapped
, sec_name
, obj_name
);
1160 printf_filtered (_("%s in section %s of %s\n"),
1161 loc_string
, sec_name
, obj_name
);
1163 if (pc_in_unmapped_range (addr
, osect
))
1164 if (section_is_overlay (osect
))
1165 printf_filtered (_("%s in load address range of %s overlay "
1167 loc_string
, mapped
, sec_name
);
1169 printf_filtered (_("%s in load address range of section %s\n"),
1170 loc_string
, sec_name
);
1172 if (section_is_overlay (osect
))
1173 printf_filtered (_("%s in %s overlay section %s\n"),
1174 loc_string
, mapped
, sec_name
);
1176 printf_filtered (_("%s in section %s\n"),
1177 loc_string
, sec_name
);
1179 do_cleanups (old_chain
);
1183 printf_filtered (_("No symbol matches %s.\n"), arg
);
1187 address_info (char *exp
, int from_tty
)
1189 struct gdbarch
*gdbarch
;
1192 struct bound_minimal_symbol msymbol
;
1194 struct obj_section
*section
;
1195 CORE_ADDR load_addr
, context_pc
= 0;
1196 struct field_of_this_result is_a_field_of_this
;
1199 error (_("Argument required."));
1201 sym
= lookup_symbol (exp
, get_selected_block (&context_pc
), VAR_DOMAIN
,
1202 &is_a_field_of_this
);
1205 if (is_a_field_of_this
.type
!= NULL
)
1207 printf_filtered ("Symbol \"");
1208 fprintf_symbol_filtered (gdb_stdout
, exp
,
1209 current_language
->la_language
, DMGL_ANSI
);
1210 printf_filtered ("\" is a field of the local class variable ");
1211 if (current_language
->la_language
== language_objc
)
1212 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1214 printf_filtered ("`this'\n");
1218 msymbol
= lookup_bound_minimal_symbol (exp
);
1220 if (msymbol
.minsym
!= NULL
)
1222 struct objfile
*objfile
= msymbol
.objfile
;
1224 gdbarch
= get_objfile_arch (objfile
);
1225 load_addr
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1227 printf_filtered ("Symbol \"");
1228 fprintf_symbol_filtered (gdb_stdout
, exp
,
1229 current_language
->la_language
, DMGL_ANSI
);
1230 printf_filtered ("\" is at ");
1231 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1232 printf_filtered (" in a file compiled without debugging");
1233 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
1234 if (section_is_overlay (section
))
1236 load_addr
= overlay_unmapped_address (load_addr
, section
);
1237 printf_filtered (",\n -- loaded at ");
1238 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1239 printf_filtered (" in overlay section %s",
1240 section
->the_bfd_section
->name
);
1242 printf_filtered (".\n");
1245 error (_("No symbol \"%s\" in current context."), exp
);
1249 printf_filtered ("Symbol \"");
1250 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1251 current_language
->la_language
, DMGL_ANSI
);
1252 printf_filtered ("\" is ");
1253 val
= SYMBOL_VALUE (sym
);
1254 section
= SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
);
1255 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1257 if (SYMBOL_COMPUTED_OPS (sym
) != NULL
)
1259 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, context_pc
,
1261 printf_filtered (".\n");
1265 switch (SYMBOL_CLASS (sym
))
1268 case LOC_CONST_BYTES
:
1269 printf_filtered ("constant");
1273 printf_filtered ("a label at address ");
1274 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1275 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1276 if (section_is_overlay (section
))
1278 load_addr
= overlay_unmapped_address (load_addr
, section
);
1279 printf_filtered (",\n -- loaded at ");
1280 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1281 printf_filtered (" in overlay section %s",
1282 section
->the_bfd_section
->name
);
1287 gdb_assert_not_reached (_("LOC_COMPUTED variable missing a method"));
1290 /* GDBARCH is the architecture associated with the objfile the symbol
1291 is defined in; the target architecture may be different, and may
1292 provide additional registers. However, we do not know the target
1293 architecture at this point. We assume the objfile architecture
1294 will contain all the standard registers that occur in debug info
1296 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1298 if (SYMBOL_IS_ARGUMENT (sym
))
1299 printf_filtered (_("an argument in register %s"),
1300 gdbarch_register_name (gdbarch
, regno
));
1302 printf_filtered (_("a variable in register %s"),
1303 gdbarch_register_name (gdbarch
, regno
));
1307 printf_filtered (_("static storage at address "));
1308 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1309 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1310 if (section_is_overlay (section
))
1312 load_addr
= overlay_unmapped_address (load_addr
, section
);
1313 printf_filtered (_(",\n -- loaded at "));
1314 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1315 printf_filtered (_(" in overlay section %s"),
1316 section
->the_bfd_section
->name
);
1320 case LOC_REGPARM_ADDR
:
1321 /* Note comment at LOC_REGISTER. */
1322 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1323 printf_filtered (_("address of an argument in register %s"),
1324 gdbarch_register_name (gdbarch
, regno
));
1328 printf_filtered (_("an argument at offset %ld"), val
);
1332 printf_filtered (_("a local variable at frame offset %ld"), val
);
1336 printf_filtered (_("a reference argument at offset %ld"), val
);
1340 printf_filtered (_("a typedef"));
1344 printf_filtered (_("a function at address "));
1345 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1346 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1347 if (section_is_overlay (section
))
1349 load_addr
= overlay_unmapped_address (load_addr
, section
);
1350 printf_filtered (_(",\n -- loaded at "));
1351 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1352 printf_filtered (_(" in overlay section %s"),
1353 section
->the_bfd_section
->name
);
1357 case LOC_UNRESOLVED
:
1359 struct bound_minimal_symbol msym
;
1361 msym
= lookup_minimal_symbol_and_objfile (SYMBOL_LINKAGE_NAME (sym
));
1362 if (msym
.minsym
== NULL
)
1363 printf_filtered ("unresolved");
1366 section
= MSYMBOL_OBJ_SECTION (msym
.objfile
, msym
.minsym
);
1367 load_addr
= BMSYMBOL_VALUE_ADDRESS (msym
);
1370 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1371 printf_filtered (_("a thread-local variable at offset %s "
1372 "in the thread-local storage for `%s'"),
1373 paddress (gdbarch
, load_addr
),
1374 objfile_name (section
->objfile
));
1377 printf_filtered (_("static storage at address "));
1378 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1379 if (section_is_overlay (section
))
1381 load_addr
= overlay_unmapped_address (load_addr
, section
);
1382 printf_filtered (_(",\n -- loaded at "));
1383 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1384 printf_filtered (_(" in overlay section %s"),
1385 section
->the_bfd_section
->name
);
1392 case LOC_OPTIMIZED_OUT
:
1393 printf_filtered (_("optimized out"));
1397 printf_filtered (_("of unknown (botched) type"));
1400 printf_filtered (".\n");
1405 x_command (char *exp
, int from_tty
)
1407 struct expression
*expr
;
1408 struct format_data fmt
;
1409 struct cleanup
*old_chain
;
1412 fmt
.format
= last_format
? last_format
: 'x';
1413 fmt
.size
= last_size
;
1417 if (exp
&& *exp
== '/')
1419 const char *tmp
= exp
+ 1;
1421 fmt
= decode_format (&tmp
, last_format
, last_size
);
1425 /* If we have an expression, evaluate it and use it as the address. */
1427 if (exp
!= 0 && *exp
!= 0)
1429 expr
= parse_expression (exp
);
1430 /* Cause expression not to be there any more if this command is
1431 repeated with Newline. But don't clobber a user-defined
1432 command's definition. */
1435 old_chain
= make_cleanup (free_current_contents
, &expr
);
1436 val
= evaluate_expression (expr
);
1437 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1438 val
= coerce_ref (val
);
1439 /* In rvalue contexts, such as this, functions are coerced into
1440 pointers to functions. This makes "x/i main" work. */
1441 if (/* last_format == 'i' && */
1442 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1443 && VALUE_LVAL (val
) == lval_memory
)
1444 next_address
= value_address (val
);
1446 next_address
= value_as_address (val
);
1448 next_gdbarch
= expr
->gdbarch
;
1449 do_cleanups (old_chain
);
1453 error_no_arg (_("starting display address"));
1455 do_examine (fmt
, next_gdbarch
, next_address
);
1457 /* If the examine succeeds, we remember its size and format for next
1458 time. Set last_size to 'b' for strings. */
1459 if (fmt
.format
== 's')
1462 last_size
= fmt
.size
;
1463 last_format
= fmt
.format
;
1465 /* Set a couple of internal variables if appropriate. */
1466 if (last_examine_value
)
1468 /* Make last address examined available to the user as $_. Use
1469 the correct pointer type. */
1470 struct type
*pointer_type
1471 = lookup_pointer_type (value_type (last_examine_value
));
1472 set_internalvar (lookup_internalvar ("_"),
1473 value_from_pointer (pointer_type
,
1474 last_examine_address
));
1476 /* Make contents of last address examined available to the user
1477 as $__. If the last value has not been fetched from memory
1478 then don't fetch it now; instead mark it by voiding the $__
1480 if (value_lazy (last_examine_value
))
1481 clear_internalvar (lookup_internalvar ("__"));
1483 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1488 /* Add an expression to the auto-display chain.
1489 Specify the expression. */
1492 display_command (char *arg
, int from_tty
)
1494 struct format_data fmt
;
1495 struct expression
*expr
;
1496 struct display
*new;
1498 const char *exp
= arg
;
1501 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1503 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1504 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1518 fmt
= decode_format (&exp
, 0, 0);
1519 if (fmt
.size
&& fmt
.format
== 0)
1521 if (fmt
.format
== 'i' || fmt
.format
== 's')
1532 innermost_block
= NULL
;
1533 expr
= parse_expression (exp
);
1535 new = (struct display
*) xmalloc (sizeof (struct display
));
1537 new->exp_string
= xstrdup (exp
);
1539 new->block
= innermost_block
;
1540 new->pspace
= current_program_space
;
1541 new->next
= display_chain
;
1542 new->number
= ++display_number
;
1545 display_chain
= new;
1548 do_one_display (new);
1555 free_display (struct display
*d
)
1557 xfree (d
->exp_string
);
1562 /* Clear out the display_chain. Done when new symtabs are loaded,
1563 since this invalidates the types stored in many expressions. */
1566 clear_displays (void)
1570 while ((d
= display_chain
) != NULL
)
1572 display_chain
= d
->next
;
1577 /* Delete the auto-display DISPLAY. */
1580 delete_display (struct display
*display
)
1584 gdb_assert (display
!= NULL
);
1586 if (display_chain
== display
)
1587 display_chain
= display
->next
;
1590 if (d
->next
== display
)
1592 d
->next
= display
->next
;
1596 free_display (display
);
1599 /* Call FUNCTION on each of the displays whose numbers are given in
1600 ARGS. DATA is passed unmodified to FUNCTION. */
1603 map_display_numbers (char *args
,
1604 void (*function
) (struct display
*,
1608 struct get_number_or_range_state state
;
1612 error_no_arg (_("one or more display numbers"));
1614 init_number_or_range (&state
, args
);
1616 while (!state
.finished
)
1618 const char *p
= state
.string
;
1620 num
= get_number_or_range (&state
);
1622 warning (_("bad display number at or near '%s'"), p
);
1625 struct display
*d
, *tmp
;
1627 ALL_DISPLAYS_SAFE (d
, tmp
)
1628 if (d
->number
== num
)
1631 printf_unfiltered (_("No display number %d.\n"), num
);
1638 /* Callback for map_display_numbers, that deletes a display. */
1641 do_delete_display (struct display
*d
, void *data
)
1646 /* "undisplay" command. */
1649 undisplay_command (char *args
, int from_tty
)
1653 if (query (_("Delete all auto-display expressions? ")))
1659 map_display_numbers (args
, do_delete_display
, NULL
);
1663 /* Display a single auto-display.
1664 Do nothing if the display cannot be printed in the current context,
1665 or if the display is disabled. */
1668 do_one_display (struct display
*d
)
1670 struct cleanup
*old_chain
;
1671 int within_current_scope
;
1673 if (d
->enabled_p
== 0)
1676 /* The expression carries the architecture that was used at parse time.
1677 This is a problem if the expression depends on architecture features
1678 (e.g. register numbers), and the current architecture is now different.
1679 For example, a display statement like "display/i $pc" is expected to
1680 display the PC register of the current architecture, not the arch at
1681 the time the display command was given. Therefore, we re-parse the
1682 expression if the current architecture has changed. */
1683 if (d
->exp
!= NULL
&& d
->exp
->gdbarch
!= get_current_arch ())
1692 volatile struct gdb_exception ex
;
1694 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1696 innermost_block
= NULL
;
1697 d
->exp
= parse_expression (d
->exp_string
);
1698 d
->block
= innermost_block
;
1702 /* Can't re-parse the expression. Disable this display item. */
1704 warning (_("Unable to display \"%s\": %s"),
1705 d
->exp_string
, ex
.message
);
1712 if (d
->pspace
== current_program_space
)
1713 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1715 within_current_scope
= 0;
1718 within_current_scope
= 1;
1719 if (!within_current_scope
)
1722 old_chain
= make_cleanup_restore_integer (¤t_display_number
);
1723 current_display_number
= d
->number
;
1725 annotate_display_begin ();
1726 printf_filtered ("%d", d
->number
);
1727 annotate_display_number_end ();
1728 printf_filtered (": ");
1731 volatile struct gdb_exception ex
;
1733 annotate_display_format ();
1735 printf_filtered ("x/");
1736 if (d
->format
.count
!= 1)
1737 printf_filtered ("%d", d
->format
.count
);
1738 printf_filtered ("%c", d
->format
.format
);
1739 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1740 printf_filtered ("%c", d
->format
.size
);
1741 printf_filtered (" ");
1743 annotate_display_expression ();
1745 puts_filtered (d
->exp_string
);
1746 annotate_display_expression_end ();
1748 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1749 printf_filtered ("\n");
1751 printf_filtered (" ");
1753 annotate_display_value ();
1755 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1760 val
= evaluate_expression (d
->exp
);
1761 addr
= value_as_address (val
);
1762 if (d
->format
.format
== 'i')
1763 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1764 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1767 fprintf_filtered (gdb_stdout
, _("<error: %s>\n"), ex
.message
);
1771 struct value_print_options opts
;
1772 volatile struct gdb_exception ex
;
1774 annotate_display_format ();
1776 if (d
->format
.format
)
1777 printf_filtered ("/%c ", d
->format
.format
);
1779 annotate_display_expression ();
1781 puts_filtered (d
->exp_string
);
1782 annotate_display_expression_end ();
1784 printf_filtered (" = ");
1786 annotate_display_expression ();
1788 get_formatted_print_options (&opts
, d
->format
.format
);
1789 opts
.raw
= d
->format
.raw
;
1791 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1795 val
= evaluate_expression (d
->exp
);
1796 print_formatted (val
, d
->format
.size
, &opts
, gdb_stdout
);
1799 fprintf_filtered (gdb_stdout
, _("<error: %s>"), ex
.message
);
1800 printf_filtered ("\n");
1803 annotate_display_end ();
1805 gdb_flush (gdb_stdout
);
1806 do_cleanups (old_chain
);
1809 /* Display all of the values on the auto-display chain which can be
1810 evaluated in the current scope. */
1817 for (d
= display_chain
; d
; d
= d
->next
)
1821 /* Delete the auto-display which we were in the process of displaying.
1822 This is done when there is an error or a signal. */
1825 disable_display (int num
)
1829 for (d
= display_chain
; d
; d
= d
->next
)
1830 if (d
->number
== num
)
1835 printf_unfiltered (_("No display number %d.\n"), num
);
1839 disable_current_display (void)
1841 if (current_display_number
>= 0)
1843 disable_display (current_display_number
);
1844 fprintf_unfiltered (gdb_stderr
,
1845 _("Disabling display %d to "
1846 "avoid infinite recursion.\n"),
1847 current_display_number
);
1849 current_display_number
= -1;
1853 display_info (char *ignore
, int from_tty
)
1858 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1860 printf_filtered (_("Auto-display expressions now in effect:\n\
1861 Num Enb Expression\n"));
1863 for (d
= display_chain
; d
; d
= d
->next
)
1865 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1867 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1869 else if (d
->format
.format
)
1870 printf_filtered ("/%c ", d
->format
.format
);
1871 puts_filtered (d
->exp_string
);
1872 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1873 printf_filtered (_(" (cannot be evaluated in the current context)"));
1874 printf_filtered ("\n");
1875 gdb_flush (gdb_stdout
);
1879 /* Callback fo map_display_numbers, that enables or disables the
1880 passed in display D. */
1883 do_enable_disable_display (struct display
*d
, void *data
)
1885 d
->enabled_p
= *(int *) data
;
1888 /* Implamentation of both the "disable display" and "enable display"
1889 commands. ENABLE decides what to do. */
1892 enable_disable_display_command (char *args
, int from_tty
, int enable
)
1899 d
->enabled_p
= enable
;
1903 map_display_numbers (args
, do_enable_disable_display
, &enable
);
1906 /* The "enable display" command. */
1909 enable_display_command (char *args
, int from_tty
)
1911 enable_disable_display_command (args
, from_tty
, 1);
1914 /* The "disable display" command. */
1917 disable_display_command (char *args
, int from_tty
)
1919 enable_disable_display_command (args
, from_tty
, 0);
1922 /* display_chain items point to blocks and expressions. Some expressions in
1923 turn may point to symbols.
1924 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1925 obstack_free'd when a shared library is unloaded.
1926 Clear pointers that are about to become dangling.
1927 Both .exp and .block fields will be restored next time we need to display
1928 an item by re-parsing .exp_string field in the new execution context. */
1931 clear_dangling_display_expressions (struct objfile
*objfile
)
1934 struct program_space
*pspace
;
1936 /* With no symbol file we cannot have a block or expression from it. */
1937 if (objfile
== NULL
)
1939 pspace
= objfile
->pspace
;
1940 if (objfile
->separate_debug_objfile_backlink
)
1942 objfile
= objfile
->separate_debug_objfile_backlink
;
1943 gdb_assert (objfile
->pspace
== pspace
);
1946 for (d
= display_chain
; d
!= NULL
; d
= d
->next
)
1948 if (d
->pspace
!= pspace
)
1951 if (lookup_objfile_from_block (d
->block
) == objfile
1952 || (d
->exp
&& exp_uses_objfile (d
->exp
, objfile
)))
1962 /* Print the value in stack frame FRAME of a variable specified by a
1963 struct symbol. NAME is the name to print; if NULL then VAR's print
1964 name will be used. STREAM is the ui_file on which to print the
1965 value. INDENT specifies the number of indent levels to print
1966 before printing the variable name.
1968 This function invalidates FRAME. */
1971 print_variable_and_value (const char *name
, struct symbol
*var
,
1972 struct frame_info
*frame
,
1973 struct ui_file
*stream
, int indent
)
1975 volatile struct gdb_exception except
;
1978 name
= SYMBOL_PRINT_NAME (var
);
1980 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1981 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1984 struct value_print_options opts
;
1986 val
= read_var_value (var
, frame
);
1987 get_user_print_options (&opts
);
1989 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1991 /* common_val_print invalidates FRAME when a pretty printer calls inferior
1995 if (except
.reason
< 0)
1996 fprintf_filtered(stream
, "<error reading variable %s (%s)>", name
,
1998 fprintf_filtered (stream
, "\n");
2001 /* Subroutine of ui_printf to simplify it.
2002 Print VALUE to STREAM using FORMAT.
2003 VALUE is a C-style string on the target. */
2006 printf_c_string (struct ui_file
*stream
, const char *format
,
2007 struct value
*value
)
2013 tem
= value_as_address (value
);
2015 /* This is a %s argument. Find the length of the string. */
2021 read_memory (tem
+ j
, &c
, 1);
2026 /* Copy the string contents into a string inside GDB. */
2027 str
= (gdb_byte
*) alloca (j
+ 1);
2029 read_memory (tem
, str
, j
);
2032 fprintf_filtered (stream
, format
, (char *) str
);
2035 /* Subroutine of ui_printf to simplify it.
2036 Print VALUE to STREAM using FORMAT.
2037 VALUE is a wide C-style string on the target. */
2040 printf_wide_c_string (struct ui_file
*stream
, const char *format
,
2041 struct value
*value
)
2046 struct gdbarch
*gdbarch
= get_type_arch (value_type (value
));
2047 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2048 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2049 "wchar_t", NULL
, 0);
2050 int wcwidth
= TYPE_LENGTH (wctype
);
2051 gdb_byte
*buf
= alloca (wcwidth
);
2052 struct obstack output
;
2053 struct cleanup
*inner_cleanup
;
2055 tem
= value_as_address (value
);
2057 /* This is a %s argument. Find the length of the string. */
2058 for (j
= 0;; j
+= wcwidth
)
2061 read_memory (tem
+ j
, buf
, wcwidth
);
2062 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2066 /* Copy the string contents into a string inside GDB. */
2067 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2069 read_memory (tem
, str
, j
);
2070 memset (&str
[j
], 0, wcwidth
);
2072 obstack_init (&output
);
2073 inner_cleanup
= make_cleanup_obstack_free (&output
);
2075 convert_between_encodings (target_wide_charset (gdbarch
),
2078 &output
, translit_char
);
2079 obstack_grow_str0 (&output
, "");
2081 fprintf_filtered (stream
, format
, obstack_base (&output
));
2082 do_cleanups (inner_cleanup
);
2085 /* Subroutine of ui_printf to simplify it.
2086 Print VALUE, a decimal floating point value, to STREAM using FORMAT. */
2089 printf_decfloat (struct ui_file
*stream
, const char *format
,
2090 struct value
*value
)
2092 const gdb_byte
*param_ptr
= value_contents (value
);
2094 #if defined (PRINTF_HAS_DECFLOAT)
2095 /* If we have native support for Decimal floating
2096 printing, handle it here. */
2097 fprintf_filtered (stream
, format
, param_ptr
);
2099 /* As a workaround until vasprintf has native support for DFP
2100 we convert the DFP values to string and print them using
2101 the %s format specifier. */
2104 /* Parameter data. */
2105 struct type
*param_type
= value_type (value
);
2106 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2107 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2109 /* DFP output data. */
2110 struct value
*dfp_value
= NULL
;
2114 struct type
*dfp_type
= NULL
;
2115 char decstr
[MAX_DECIMAL_STRING
];
2117 /* Points to the end of the string so that we can go back
2118 and check for DFP length modifiers. */
2119 p
= format
+ strlen (format
);
2121 /* Look for the float/double format specifier. */
2122 while (*p
!= 'f' && *p
!= 'e' && *p
!= 'E'
2123 && *p
!= 'g' && *p
!= 'G')
2126 /* Search for the '%' char and extract the size and type of
2127 the output decimal value based on its modifiers
2128 (%Hf, %Df, %DDf). */
2134 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2136 else if (*p
== 'D' && *(p
- 1) == 'D')
2139 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2145 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2149 /* Conversion between different DFP types. */
2150 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2151 decimal_convert (param_ptr
, TYPE_LENGTH (param_type
),
2152 byte_order
, dec
, dfp_len
, byte_order
);
2154 /* If this is a non-trivial conversion, just output 0.
2155 A correct converted value can be displayed by explicitly
2156 casting to a DFP type. */
2157 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2159 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2161 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2163 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2165 /* Print the DFP value. */
2166 fprintf_filtered (stream
, "%s", decstr
);
2170 /* Subroutine of ui_printf to simplify it.
2171 Print VALUE, a target pointer, to STREAM using FORMAT. */
2174 printf_pointer (struct ui_file
*stream
, const char *format
,
2175 struct value
*value
)
2177 /* We avoid the host's %p because pointers are too
2178 likely to be the wrong size. The only interesting
2179 modifier for %p is a width; extract that, and then
2180 handle %p as glibc would: %#x or a literal "(nil)". */
2184 #ifdef PRINTF_HAS_LONG_LONG
2185 long long val
= value_as_long (value
);
2187 long val
= value_as_long (value
);
2190 fmt
= alloca (strlen (format
) + 5);
2192 /* Copy up to the leading %. */
2197 int is_percent
= (*p
== '%');
2212 /* Copy any width. */
2213 while (*p
>= '0' && *p
< '9')
2216 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2219 #ifdef PRINTF_HAS_LONG_LONG
2225 fprintf_filtered (stream
, fmt
, val
);
2231 fprintf_filtered (stream
, fmt
, "(nil)");
2235 /* printf "printf format string" ARG to STREAM. */
2238 ui_printf (const char *arg
, struct ui_file
*stream
)
2240 struct format_piece
*fpieces
;
2241 const char *s
= arg
;
2242 struct value
**val_args
;
2243 int allocated_args
= 20;
2244 struct cleanup
*old_cleanups
;
2246 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
2247 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2250 error_no_arg (_("format-control string and values to print"));
2252 s
= skip_spaces_const (s
);
2254 /* A format string should follow, enveloped in double quotes. */
2256 error (_("Bad format string, missing '\"'."));
2258 fpieces
= parse_format_string (&s
);
2260 make_cleanup (free_format_pieces_cleanup
, &fpieces
);
2263 error (_("Bad format string, non-terminated '\"'."));
2265 s
= skip_spaces_const (s
);
2267 if (*s
!= ',' && *s
!= 0)
2268 error (_("Invalid argument syntax"));
2272 s
= skip_spaces_const (s
);
2278 char *current_substring
;
2281 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2282 if (fpieces
[fr
].argclass
!= literal_piece
)
2285 /* Now, parse all arguments and evaluate them.
2286 Store the VALUEs in VAL_ARGS. */
2292 if (nargs
== allocated_args
)
2293 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2294 (allocated_args
*= 2)
2295 * sizeof (struct value
*));
2297 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2305 if (nargs
!= nargs_wanted
)
2306 error (_("Wrong number of arguments for specified format-string"));
2308 /* Now actually print them. */
2310 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2312 current_substring
= fpieces
[fr
].string
;
2313 switch (fpieces
[fr
].argclass
)
2316 printf_c_string (stream
, current_substring
, val_args
[i
]);
2318 case wide_string_arg
:
2319 printf_wide_c_string (stream
, current_substring
, val_args
[i
]);
2323 struct gdbarch
*gdbarch
2324 = get_type_arch (value_type (val_args
[i
]));
2325 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2326 "wchar_t", NULL
, 0);
2327 struct type
*valtype
;
2328 struct obstack output
;
2329 struct cleanup
*inner_cleanup
;
2330 const gdb_byte
*bytes
;
2332 valtype
= value_type (val_args
[i
]);
2333 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2334 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2335 error (_("expected wchar_t argument for %%lc"));
2337 bytes
= value_contents (val_args
[i
]);
2339 obstack_init (&output
);
2340 inner_cleanup
= make_cleanup_obstack_free (&output
);
2342 convert_between_encodings (target_wide_charset (gdbarch
),
2344 bytes
, TYPE_LENGTH (valtype
),
2345 TYPE_LENGTH (valtype
),
2346 &output
, translit_char
);
2347 obstack_grow_str0 (&output
, "");
2349 fprintf_filtered (stream
, current_substring
,
2350 obstack_base (&output
));
2351 do_cleanups (inner_cleanup
);
2356 struct type
*type
= value_type (val_args
[i
]);
2360 /* If format string wants a float, unchecked-convert the value
2361 to floating point of the same size. */
2362 type
= float_type_from_length (type
);
2363 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2365 error (_("Invalid floating value found in program."));
2367 fprintf_filtered (stream
, current_substring
, (double) val
);
2370 case long_double_arg
:
2371 #ifdef HAVE_LONG_DOUBLE
2373 struct type
*type
= value_type (val_args
[i
]);
2377 /* If format string wants a float, unchecked-convert the value
2378 to floating point of the same size. */
2379 type
= float_type_from_length (type
);
2380 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2382 error (_("Invalid floating value found in program."));
2384 fprintf_filtered (stream
, current_substring
,
2389 error (_("long double not supported in printf"));
2392 #ifdef PRINTF_HAS_LONG_LONG
2394 long long val
= value_as_long (val_args
[i
]);
2396 fprintf_filtered (stream
, current_substring
, val
);
2400 error (_("long long not supported in printf"));
2404 int val
= value_as_long (val_args
[i
]);
2406 fprintf_filtered (stream
, current_substring
, val
);
2411 long val
= value_as_long (val_args
[i
]);
2413 fprintf_filtered (stream
, current_substring
, val
);
2416 /* Handles decimal floating values. */
2418 printf_decfloat (stream
, current_substring
, val_args
[i
]);
2421 printf_pointer (stream
, current_substring
, val_args
[i
]);
2424 /* Print a portion of the format string that has no
2425 directives. Note that this will not include any
2426 ordinary %-specs, but it might include "%%". That is
2427 why we use printf_filtered and not puts_filtered here.
2428 Also, we pass a dummy argument because some platforms
2429 have modified GCC to include -Wformat-security by
2430 default, which will warn here if there is no
2432 fprintf_filtered (stream
, current_substring
, 0);
2435 internal_error (__FILE__
, __LINE__
,
2436 _("failed internal consistency check"));
2438 /* Maybe advance to the next argument. */
2439 if (fpieces
[fr
].argclass
!= literal_piece
)
2443 do_cleanups (old_cleanups
);
2446 /* Implement the "printf" command. */
2449 printf_command (char *arg
, int from_tty
)
2451 ui_printf (arg
, gdb_stdout
);
2452 gdb_flush (gdb_stdout
);
2455 /* Implement the "eval" command. */
2458 eval_command (char *arg
, int from_tty
)
2460 struct ui_file
*ui_out
= mem_fileopen ();
2461 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (ui_out
);
2464 ui_printf (arg
, ui_out
);
2466 expanded
= ui_file_xstrdup (ui_out
, NULL
);
2467 make_cleanup (xfree
, expanded
);
2469 execute_command (expanded
, from_tty
);
2471 do_cleanups (cleanups
);
2475 _initialize_printcmd (void)
2477 struct cmd_list_element
*c
;
2479 current_display_number
= -1;
2481 observer_attach_free_objfile (clear_dangling_display_expressions
);
2483 add_info ("address", address_info
,
2484 _("Describe where symbol SYM is stored."));
2486 add_info ("symbol", sym_info
, _("\
2487 Describe what symbol is at location ADDR.\n\
2488 Only for symbols with fixed locations (global or static scope)."));
2490 add_com ("x", class_vars
, x_command
, _("\
2491 Examine memory: x/FMT ADDRESS.\n\
2492 ADDRESS is an expression for the memory address to examine.\n\
2493 FMT is a repeat count followed by a format letter and a size letter.\n\
2494 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2495 t(binary), f(float), a(address), i(instruction), c(char), s(string)\n\
2496 and z(hex, zero padded on the left).\n\
2497 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2498 The specified number of objects of the specified size are printed\n\
2499 according to the format.\n\n\
2500 Defaults for format and size letters are those previously used.\n\
2501 Default count is 1. Default address is following last thing printed\n\
2502 with this command or \"print\"."));
2505 add_com ("whereis", class_vars
, whereis_command
,
2506 _("Print line number and file of definition of variable."));
2509 add_info ("display", display_info
, _("\
2510 Expressions to display when program stops, with code numbers."));
2512 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2513 Cancel some expressions to be displayed when program stops.\n\
2514 Arguments are the code numbers of the expressions to stop displaying.\n\
2515 No argument means cancel all automatic-display expressions.\n\
2516 \"delete display\" has the same effect as this command.\n\
2517 Do \"info display\" to see current list of code numbers."),
2520 add_com ("display", class_vars
, display_command
, _("\
2521 Print value of expression EXP each time the program stops.\n\
2522 /FMT may be used before EXP as in the \"print\" command.\n\
2523 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2524 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2525 and examining is done as in the \"x\" command.\n\n\
2526 With no argument, display all currently requested auto-display expressions.\n\
2527 Use \"undisplay\" to cancel display requests previously made."));
2529 add_cmd ("display", class_vars
, enable_display_command
, _("\
2530 Enable some expressions to be displayed when program stops.\n\
2531 Arguments are the code numbers of the expressions to resume displaying.\n\
2532 No argument means enable all automatic-display expressions.\n\
2533 Do \"info display\" to see current list of code numbers."), &enablelist
);
2535 add_cmd ("display", class_vars
, disable_display_command
, _("\
2536 Disable some expressions to be displayed when program stops.\n\
2537 Arguments are the code numbers of the expressions to stop displaying.\n\
2538 No argument means disable all automatic-display expressions.\n\
2539 Do \"info display\" to see current list of code numbers."), &disablelist
);
2541 add_cmd ("display", class_vars
, undisplay_command
, _("\
2542 Cancel some expressions to be displayed when program stops.\n\
2543 Arguments are the code numbers of the expressions to stop displaying.\n\
2544 No argument means cancel all automatic-display expressions.\n\
2545 Do \"info display\" to see current list of code numbers."), &deletelist
);
2547 add_com ("printf", class_vars
, printf_command
, _("\
2548 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2549 This is useful for formatted output in user-defined commands."));
2551 add_com ("output", class_vars
, output_command
, _("\
2552 Like \"print\" but don't put in value history and don't print newline.\n\
2553 This is useful in user-defined commands."));
2555 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2556 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2557 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2558 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2559 with $), a register (a few standard names starting with $), or an actual\n\
2560 variable in the program being debugged. EXP is any valid expression.\n\
2561 Use \"set variable\" for variables with names identical to set subcommands.\n\
2563 With a subcommand, this command modifies parts of the gdb environment.\n\
2564 You can see these environment settings with the \"show\" command."),
2565 &setlist
, "set ", 1, &cmdlist
);
2567 add_com ("assign", class_vars
, set_command
, _("\
2568 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2569 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2570 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2571 with $), a register (a few standard names starting with $), or an actual\n\
2572 variable in the program being debugged. EXP is any valid expression.\n\
2573 Use \"set variable\" for variables with names identical to set subcommands.\n\
2574 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2575 You can see these environment settings with the \"show\" command."));
2577 /* "call" is the same as "set", but handy for dbx users to call fns. */
2578 c
= add_com ("call", class_vars
, call_command
, _("\
2579 Call a function in the program.\n\
2580 The argument is the function name and arguments, in the notation of the\n\
2581 current working language. The result is printed and saved in the value\n\
2582 history, if it is not void."));
2583 set_cmd_completer (c
, expression_completer
);
2585 add_cmd ("variable", class_vars
, set_command
, _("\
2586 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2587 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2588 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2589 with $), a register (a few standard names starting with $), or an actual\n\
2590 variable in the program being debugged. EXP is any valid expression.\n\
2591 This may usually be abbreviated to simply \"set\"."),
2594 c
= add_com ("print", class_vars
, print_command
, _("\
2595 Print value of expression EXP.\n\
2596 Variables accessible are those of the lexical environment of the selected\n\
2597 stack frame, plus all those whose scope is global or an entire file.\n\
2599 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2600 $$NUM refers to NUM'th value back from the last one.\n\
2601 Names starting with $ refer to registers (with the values they would have\n\
2602 if the program were to return to the stack frame now selected, restoring\n\
2603 all registers saved by frames farther in) or else to debugger\n\
2604 \"convenience\" variables (any such name not a known register).\n\
2605 Use assignment expressions to give values to convenience variables.\n\
2607 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2608 @ is a binary operator for treating consecutive data objects\n\
2609 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2610 element is FOO, whose second element is stored in the space following\n\
2611 where FOO is stored, etc. FOO must be an expression whose value\n\
2612 resides in memory.\n\
2614 EXP may be preceded with /FMT, where FMT is a format letter\n\
2615 but no count or size letter (see \"x\" command)."));
2616 set_cmd_completer (c
, expression_completer
);
2617 add_com_alias ("p", "print", class_vars
, 1);
2618 add_com_alias ("inspect", "print", class_vars
, 1);
2620 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2621 &max_symbolic_offset
, _("\
2622 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2623 Show the largest offset that will be printed in <symbol+1234> form."), _("\
2624 Tell GDB to only display the symbolic form of an address if the\n\
2625 offset between the closest earlier symbol and the address is less than\n\
2626 the specified maximum offset. The default is \"unlimited\", which tells GDB\n\
2627 to always print the symbolic form of an address if any symbol precedes\n\
2628 it. Zero is equivalent to \"unlimited\"."),
2630 show_max_symbolic_offset
,
2631 &setprintlist
, &showprintlist
);
2632 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2633 &print_symbol_filename
, _("\
2634 Set printing of source filename and line number with <symbol>."), _("\
2635 Show printing of source filename and line number with <symbol>."), NULL
,
2637 show_print_symbol_filename
,
2638 &setprintlist
, &showprintlist
);
2640 add_com ("eval", no_class
, eval_command
, _("\
2641 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2642 a command line, and call it."));