1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986-2013 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"
56 #include "tui/tui.h" /* For tui_active et al. */
65 /* True if the value should be printed raw -- that is, bypassing
66 python-based formatters. */
70 /* Last specified output format. */
72 static char last_format
= 0;
74 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
76 static char last_size
= 'w';
78 /* Default address to examine next, and associated architecture. */
80 static struct gdbarch
*next_gdbarch
;
81 static CORE_ADDR next_address
;
83 /* Number of delay instructions following current disassembled insn. */
85 static int branch_delay_insns
;
87 /* Last address examined. */
89 static CORE_ADDR last_examine_address
;
91 /* Contents of last address examined.
92 This is not valid past the end of the `x' command! */
94 static struct value
*last_examine_value
;
96 /* Largest offset between a symbolic value and an address, that will be
97 printed as `0x1234 <symbol+offset>'. */
99 static unsigned int max_symbolic_offset
= UINT_MAX
;
101 show_max_symbolic_offset (struct ui_file
*file
, int from_tty
,
102 struct cmd_list_element
*c
, const char *value
)
104 fprintf_filtered (file
,
105 _("The largest offset that will be "
106 "printed in <symbol+1234> form is %s.\n"),
110 /* Append the source filename and linenumber of the symbol when
111 printing a symbolic value as `<symbol at filename:linenum>' if set. */
112 static int print_symbol_filename
= 0;
114 show_print_symbol_filename (struct ui_file
*file
, int from_tty
,
115 struct cmd_list_element
*c
, const char *value
)
117 fprintf_filtered (file
, _("Printing of source filename and "
118 "line number with <symbol> is %s.\n"),
122 /* Number of auto-display expression currently being displayed.
123 So that we can disable it if we get a signal within it.
124 -1 when not doing one. */
126 static int current_display_number
;
130 /* Chain link to next auto-display item. */
131 struct display
*next
;
133 /* The expression as the user typed it. */
136 /* Expression to be evaluated and displayed. */
137 struct expression
*exp
;
139 /* Item number of this auto-display item. */
142 /* Display format specified. */
143 struct format_data format
;
145 /* Program space associated with `block'. */
146 struct program_space
*pspace
;
148 /* Innermost block required by this expression when evaluated. */
149 const struct block
*block
;
151 /* Status of this display (enabled or disabled). */
155 /* Chain of expressions whose values should be displayed
156 automatically each time the program stops. */
158 static struct display
*display_chain
;
160 static int display_number
;
162 /* Walk the following statement or block through all displays.
163 ALL_DISPLAYS_SAFE does so even if the statement deletes the current
166 #define ALL_DISPLAYS(B) \
167 for (B = display_chain; B; B = B->next)
169 #define ALL_DISPLAYS_SAFE(B,TMP) \
170 for (B = display_chain; \
171 B ? (TMP = B->next, 1): 0; \
174 /* Prototypes for exported functions. */
176 void _initialize_printcmd (void);
178 /* Prototypes for local functions. */
180 static void do_one_display (struct display
*);
183 /* Decode a format specification. *STRING_PTR should point to it.
184 OFORMAT and OSIZE are used as defaults for the format and size
185 if none are given in the format specification.
186 If OSIZE is zero, then the size field of the returned value
187 should be set only if a size is explicitly specified by the
189 The structure returned describes all the data
190 found in the specification. In addition, *STRING_PTR is advanced
191 past the specification and past all whitespace following it. */
193 static struct format_data
194 decode_format (const char **string_ptr
, int oformat
, int osize
)
196 struct format_data val
;
197 const char *p
= *string_ptr
;
204 if (*p
>= '0' && *p
<= '9')
205 val
.count
= atoi (p
);
206 while (*p
>= '0' && *p
<= '9')
209 /* Now process size or format letters that follow. */
213 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
220 else if (*p
>= 'a' && *p
<= 'z')
226 while (*p
== ' ' || *p
== '\t')
230 /* Set defaults for format and size if not specified. */
231 if (val
.format
== '?')
235 /* Neither has been specified. */
236 val
.format
= oformat
;
240 /* If a size is specified, any format makes a reasonable
241 default except 'i'. */
242 val
.format
= oformat
== 'i' ? 'x' : oformat
;
244 else if (val
.size
== '?')
248 /* Pick the appropriate size for an address. This is deferred
249 until do_examine when we know the actual architecture to use.
250 A special size value of 'a' is used to indicate this case. */
251 val
.size
= osize
? 'a' : osize
;
254 /* Floating point has to be word or giantword. */
255 if (osize
== 'w' || osize
== 'g')
258 /* Default it to giantword if the last used size is not
260 val
.size
= osize
? 'g' : osize
;
263 /* Characters default to one byte. */
264 val
.size
= osize
? 'b' : osize
;
267 /* Display strings with byte size chars unless explicitly
273 /* The default is the size most recently specified. */
280 /* Print value VAL on stream according to OPTIONS.
281 Do not end with a newline.
282 SIZE is the letter for the size of datum being printed.
283 This is used to pad hex numbers so they line up. SIZE is 0
284 for print / output and set for examine. */
287 print_formatted (struct value
*val
, int size
,
288 const struct value_print_options
*options
,
289 struct ui_file
*stream
)
291 struct type
*type
= check_typedef (value_type (val
));
292 int len
= TYPE_LENGTH (type
);
294 if (VALUE_LVAL (val
) == lval_memory
)
295 next_address
= value_address (val
) + len
;
299 switch (options
->format
)
303 struct type
*elttype
= value_type (val
);
305 next_address
= (value_address (val
)
306 + val_print_string (elttype
, NULL
,
307 value_address (val
), -1,
308 stream
, options
) * len
);
313 /* We often wrap here if there are long symbolic names. */
315 next_address
= (value_address (val
)
316 + gdb_print_insn (get_type_arch (type
),
317 value_address (val
), stream
,
318 &branch_delay_insns
));
323 if (options
->format
== 0 || options
->format
== 's'
324 || TYPE_CODE (type
) == TYPE_CODE_REF
325 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
326 || TYPE_CODE (type
) == TYPE_CODE_STRING
327 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
328 || TYPE_CODE (type
) == TYPE_CODE_UNION
329 || TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
330 value_print (val
, stream
, options
);
332 /* User specified format, so don't look to the type to tell us
334 val_print_scalar_formatted (type
,
335 value_contents_for_printing (val
),
336 value_embedded_offset (val
),
338 options
, size
, stream
);
341 /* Return builtin floating point type of same length as TYPE.
342 If no such type is found, return TYPE itself. */
344 float_type_from_length (struct type
*type
)
346 struct gdbarch
*gdbarch
= get_type_arch (type
);
347 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
349 if (TYPE_LENGTH (type
) == TYPE_LENGTH (builtin
->builtin_float
))
350 type
= builtin
->builtin_float
;
351 else if (TYPE_LENGTH (type
) == TYPE_LENGTH (builtin
->builtin_double
))
352 type
= builtin
->builtin_double
;
353 else if (TYPE_LENGTH (type
) == TYPE_LENGTH (builtin
->builtin_long_double
))
354 type
= builtin
->builtin_long_double
;
359 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
360 according to OPTIONS and SIZE on STREAM. Formats s and i are not
361 supported at this level. */
364 print_scalar_formatted (const void *valaddr
, struct type
*type
,
365 const struct value_print_options
*options
,
366 int size
, struct ui_file
*stream
)
368 struct gdbarch
*gdbarch
= get_type_arch (type
);
369 LONGEST val_long
= 0;
370 unsigned int len
= TYPE_LENGTH (type
);
371 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
373 /* String printing should go through val_print_scalar_formatted. */
374 gdb_assert (options
->format
!= 's');
376 if (len
> sizeof(LONGEST
) &&
377 (TYPE_CODE (type
) == TYPE_CODE_INT
378 || TYPE_CODE (type
) == TYPE_CODE_ENUM
))
380 switch (options
->format
)
383 print_octal_chars (stream
, valaddr
, len
, byte_order
);
387 print_decimal_chars (stream
, valaddr
, len
, byte_order
);
390 print_binary_chars (stream
, valaddr
, len
, byte_order
);
393 print_hex_chars (stream
, valaddr
, len
, byte_order
);
396 print_char_chars (stream
, type
, valaddr
, len
, byte_order
);
403 if (options
->format
!= 'f')
404 val_long
= unpack_long (type
, valaddr
);
406 /* If the value is a pointer, and pointers and addresses are not the
407 same, then at this point, the value's length (in target bytes) is
408 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
409 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
410 len
= gdbarch_addr_bit (gdbarch
) / TARGET_CHAR_BIT
;
412 /* If we are printing it as unsigned, truncate it in case it is actually
413 a negative signed value (e.g. "print/u (short)-1" should print 65535
414 (if shorts are 16 bits) instead of 4294967295). */
415 if (options
->format
!= 'd' || TYPE_UNSIGNED (type
))
417 if (len
< sizeof (LONGEST
))
418 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
421 switch (options
->format
)
426 /* No size specified, like in print. Print varying # of digits. */
427 print_longest (stream
, 'x', 1, val_long
);
436 print_longest (stream
, size
, 1, val_long
);
439 error (_("Undefined output size \"%c\"."), size
);
444 print_longest (stream
, 'd', 1, val_long
);
448 print_longest (stream
, 'u', 0, val_long
);
453 print_longest (stream
, 'o', 1, val_long
);
455 fprintf_filtered (stream
, "0");
460 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
462 print_address (gdbarch
, addr
, stream
);
468 struct value_print_options opts
= *options
;
471 if (TYPE_UNSIGNED (type
))
472 type
= builtin_type (gdbarch
)->builtin_true_unsigned_char
;
474 type
= builtin_type (gdbarch
)->builtin_true_char
;
476 value_print (value_from_longest (type
, val_long
), stream
, &opts
);
481 type
= float_type_from_length (type
);
482 print_floating (valaddr
, type
, stream
);
486 internal_error (__FILE__
, __LINE__
,
487 _("failed internal consistency check"));
490 /* Binary; 't' stands for "two". */
492 char bits
[8 * (sizeof val_long
) + 1];
493 char buf
[8 * (sizeof val_long
) + 32];
498 width
= 8 * (sizeof val_long
);
515 error (_("Undefined output size \"%c\"."), size
);
521 bits
[width
] = (val_long
& 1) ? '1' : '0';
526 while (*cp
&& *cp
== '0')
531 strncpy (buf
, cp
, sizeof (bits
));
532 fputs_filtered (buf
, stream
);
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 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
).minsym
;
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
);
681 && MSYMBOL_HAS_SIZE (msymbol
)
682 && MSYMBOL_SIZE (msymbol
) == 0
683 && MSYMBOL_TYPE (msymbol
) != mst_text
684 && MSYMBOL_TYPE (msymbol
) != mst_text_gnu_ifunc
685 && MSYMBOL_TYPE (msymbol
) != mst_file_text
)
690 if (SYMBOL_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
) == mst_text
698 || MSYMBOL_TYPE (msymbol
) == mst_text_gnu_ifunc
699 || MSYMBOL_TYPE (msymbol
) == mst_file_text
700 || MSYMBOL_TYPE (msymbol
) == 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
= SYMBOL_VALUE_ADDRESS (msymbol
);
707 if (do_demangle
|| asm_demangle
)
708 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
710 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
713 if (symbol
== NULL
&& msymbol
== 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
);
986 annotate_value_history_begin (histindex
, value_type (val
));
988 annotate_value_begin (value_type (val
));
991 printf_filtered ("$%d = ", histindex
);
994 annotate_value_history_value ();
996 get_formatted_print_options (&opts
, format
);
999 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
1000 printf_filtered ("\n");
1003 annotate_value_history_end ();
1005 annotate_value_end ();
1008 do_cleanups (old_chain
);
1012 print_command (char *exp
, int from_tty
)
1014 print_command_1 (exp
, 1);
1017 /* Same as print, except it doesn't print void results. */
1019 call_command (char *exp
, int from_tty
)
1021 print_command_1 (exp
, 0);
1024 /* Implementation of the "output" command. */
1027 output_command (char *exp
, int from_tty
)
1029 output_command_const (exp
, from_tty
);
1032 /* Like output_command, but takes a const string as argument. */
1035 output_command_const (const 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
)
1127 = lookup_minimal_symbol_by_pc_section (sect_addr
, osect
).minsym
))
1129 const char *obj_name
, *mapped
, *sec_name
, *msym_name
;
1131 struct cleanup
*old_chain
;
1134 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1135 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1136 sec_name
= osect
->the_bfd_section
->name
;
1137 msym_name
= SYMBOL_PRINT_NAME (msymbol
);
1139 /* Don't print the offset if it is zero.
1140 We assume there's no need to handle i18n of "sym + offset". */
1142 loc_string
= xstrprintf ("%s + %u", msym_name
, offset
);
1144 loc_string
= xstrprintf ("%s", msym_name
);
1146 /* Use a cleanup to free loc_string in case the user quits
1147 a pagination request inside printf_filtered. */
1148 old_chain
= make_cleanup (xfree
, loc_string
);
1150 gdb_assert (osect
->objfile
&& osect
->objfile
->name
);
1151 obj_name
= osect
->objfile
->name
;
1153 if (MULTI_OBJFILE_P ())
1154 if (pc_in_unmapped_range (addr
, osect
))
1155 if (section_is_overlay (osect
))
1156 printf_filtered (_("%s in load address range of "
1157 "%s overlay section %s of %s\n"),
1158 loc_string
, mapped
, sec_name
, obj_name
);
1160 printf_filtered (_("%s in load address range of "
1161 "section %s of %s\n"),
1162 loc_string
, sec_name
, obj_name
);
1164 if (section_is_overlay (osect
))
1165 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1166 loc_string
, mapped
, sec_name
, obj_name
);
1168 printf_filtered (_("%s in section %s of %s\n"),
1169 loc_string
, sec_name
, obj_name
);
1171 if (pc_in_unmapped_range (addr
, osect
))
1172 if (section_is_overlay (osect
))
1173 printf_filtered (_("%s in load address range of %s overlay "
1175 loc_string
, mapped
, sec_name
);
1177 printf_filtered (_("%s in load address range of section %s\n"),
1178 loc_string
, sec_name
);
1180 if (section_is_overlay (osect
))
1181 printf_filtered (_("%s in %s overlay section %s\n"),
1182 loc_string
, mapped
, sec_name
);
1184 printf_filtered (_("%s in section %s\n"),
1185 loc_string
, sec_name
);
1187 do_cleanups (old_chain
);
1191 printf_filtered (_("No symbol matches %s.\n"), arg
);
1195 address_info (char *exp
, int from_tty
)
1197 struct gdbarch
*gdbarch
;
1200 struct minimal_symbol
*msymbol
;
1202 struct obj_section
*section
;
1203 CORE_ADDR load_addr
, context_pc
= 0;
1204 struct field_of_this_result 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
.type
!= NULL
)
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 struct objfile
*objfile
= msymbol_objfile (msymbol
);
1232 gdbarch
= get_objfile_arch (objfile
);
1233 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1235 printf_filtered ("Symbol \"");
1236 fprintf_symbol_filtered (gdb_stdout
, exp
,
1237 current_language
->la_language
, DMGL_ANSI
);
1238 printf_filtered ("\" is at ");
1239 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1240 printf_filtered (" in a file compiled without debugging");
1241 section
= SYMBOL_OBJ_SECTION (objfile
, msymbol
);
1242 if (section_is_overlay (section
))
1244 load_addr
= overlay_unmapped_address (load_addr
, section
);
1245 printf_filtered (",\n -- loaded at ");
1246 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1247 printf_filtered (" in overlay section %s",
1248 section
->the_bfd_section
->name
);
1250 printf_filtered (".\n");
1253 error (_("No symbol \"%s\" in current context."), exp
);
1257 printf_filtered ("Symbol \"");
1258 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1259 current_language
->la_language
, DMGL_ANSI
);
1260 printf_filtered ("\" is ");
1261 val
= SYMBOL_VALUE (sym
);
1262 section
= SYMBOL_OBJ_SECTION (SYMBOL_OBJFILE (sym
), sym
);
1263 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1265 if (SYMBOL_COMPUTED_OPS (sym
) != NULL
)
1267 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, context_pc
,
1269 printf_filtered (".\n");
1273 switch (SYMBOL_CLASS (sym
))
1276 case LOC_CONST_BYTES
:
1277 printf_filtered ("constant");
1281 printf_filtered ("a label at address ");
1282 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1283 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1284 if (section_is_overlay (section
))
1286 load_addr
= overlay_unmapped_address (load_addr
, section
);
1287 printf_filtered (",\n -- loaded at ");
1288 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1289 printf_filtered (" in overlay section %s",
1290 section
->the_bfd_section
->name
);
1295 gdb_assert_not_reached (_("LOC_COMPUTED variable missing a method"));
1298 /* GDBARCH is the architecture associated with the objfile the symbol
1299 is defined in; the target architecture may be different, and may
1300 provide additional registers. However, we do not know the target
1301 architecture at this point. We assume the objfile architecture
1302 will contain all the standard registers that occur in debug info
1304 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1306 if (SYMBOL_IS_ARGUMENT (sym
))
1307 printf_filtered (_("an argument in register %s"),
1308 gdbarch_register_name (gdbarch
, regno
));
1310 printf_filtered (_("a variable in register %s"),
1311 gdbarch_register_name (gdbarch
, regno
));
1315 printf_filtered (_("static storage at address "));
1316 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1317 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1318 if (section_is_overlay (section
))
1320 load_addr
= overlay_unmapped_address (load_addr
, section
);
1321 printf_filtered (_(",\n -- loaded at "));
1322 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1323 printf_filtered (_(" in overlay section %s"),
1324 section
->the_bfd_section
->name
);
1328 case LOC_REGPARM_ADDR
:
1329 /* Note comment at LOC_REGISTER. */
1330 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1331 printf_filtered (_("address of an argument in register %s"),
1332 gdbarch_register_name (gdbarch
, regno
));
1336 printf_filtered (_("an argument at offset %ld"), val
);
1340 printf_filtered (_("a local variable at frame offset %ld"), val
);
1344 printf_filtered (_("a reference argument at offset %ld"), val
);
1348 printf_filtered (_("a typedef"));
1352 printf_filtered (_("a function at address "));
1353 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1354 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1355 if (section_is_overlay (section
))
1357 load_addr
= overlay_unmapped_address (load_addr
, section
);
1358 printf_filtered (_(",\n -- loaded at "));
1359 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1360 printf_filtered (_(" in overlay section %s"),
1361 section
->the_bfd_section
->name
);
1365 case LOC_UNRESOLVED
:
1367 struct bound_minimal_symbol msym
;
1369 msym
= lookup_minimal_symbol_and_objfile (SYMBOL_LINKAGE_NAME (sym
));
1370 if (msym
.minsym
== NULL
)
1371 printf_filtered ("unresolved");
1374 section
= SYMBOL_OBJ_SECTION (msym
.objfile
, msym
.minsym
);
1375 load_addr
= SYMBOL_VALUE_ADDRESS (msym
.minsym
);
1378 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1379 printf_filtered (_("a thread-local variable at offset %s "
1380 "in the thread-local storage for `%s'"),
1381 paddress (gdbarch
, load_addr
),
1382 section
->objfile
->name
);
1385 printf_filtered (_("static storage at address "));
1386 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1387 if (section_is_overlay (section
))
1389 load_addr
= overlay_unmapped_address (load_addr
, section
);
1390 printf_filtered (_(",\n -- loaded at "));
1391 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1392 printf_filtered (_(" in overlay section %s"),
1393 section
->the_bfd_section
->name
);
1400 case LOC_OPTIMIZED_OUT
:
1401 printf_filtered (_("optimized out"));
1405 printf_filtered (_("of unknown (botched) type"));
1408 printf_filtered (".\n");
1413 x_command (char *exp
, int from_tty
)
1415 struct expression
*expr
;
1416 struct format_data fmt
;
1417 struct cleanup
*old_chain
;
1420 fmt
.format
= last_format
? last_format
: 'x';
1421 fmt
.size
= last_size
;
1425 if (exp
&& *exp
== '/')
1427 const char *tmp
= exp
+ 1;
1429 fmt
= decode_format (&tmp
, last_format
, last_size
);
1433 /* If we have an expression, evaluate it and use it as the address. */
1435 if (exp
!= 0 && *exp
!= 0)
1437 expr
= parse_expression (exp
);
1438 /* Cause expression not to be there any more if this command is
1439 repeated with Newline. But don't clobber a user-defined
1440 command's definition. */
1443 old_chain
= make_cleanup (free_current_contents
, &expr
);
1444 val
= evaluate_expression (expr
);
1445 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1446 val
= coerce_ref (val
);
1447 /* In rvalue contexts, such as this, functions are coerced into
1448 pointers to functions. This makes "x/i main" work. */
1449 if (/* last_format == 'i' && */
1450 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1451 && VALUE_LVAL (val
) == lval_memory
)
1452 next_address
= value_address (val
);
1454 next_address
= value_as_address (val
);
1456 next_gdbarch
= expr
->gdbarch
;
1457 do_cleanups (old_chain
);
1461 error_no_arg (_("starting display address"));
1463 do_examine (fmt
, next_gdbarch
, next_address
);
1465 /* If the examine succeeds, we remember its size and format for next
1466 time. Set last_size to 'b' for strings. */
1467 if (fmt
.format
== 's')
1470 last_size
= fmt
.size
;
1471 last_format
= fmt
.format
;
1473 /* Set a couple of internal variables if appropriate. */
1474 if (last_examine_value
)
1476 /* Make last address examined available to the user as $_. Use
1477 the correct pointer type. */
1478 struct type
*pointer_type
1479 = lookup_pointer_type (value_type (last_examine_value
));
1480 set_internalvar (lookup_internalvar ("_"),
1481 value_from_pointer (pointer_type
,
1482 last_examine_address
));
1484 /* Make contents of last address examined available to the user
1485 as $__. If the last value has not been fetched from memory
1486 then don't fetch it now; instead mark it by voiding the $__
1488 if (value_lazy (last_examine_value
))
1489 clear_internalvar (lookup_internalvar ("__"));
1491 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1496 /* Add an expression to the auto-display chain.
1497 Specify the expression. */
1500 display_command (char *arg
, int from_tty
)
1502 struct format_data fmt
;
1503 struct expression
*expr
;
1504 struct display
*new;
1506 const char *exp
= arg
;
1509 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1511 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1512 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1526 fmt
= decode_format (&exp
, 0, 0);
1527 if (fmt
.size
&& fmt
.format
== 0)
1529 if (fmt
.format
== 'i' || fmt
.format
== 's')
1540 innermost_block
= NULL
;
1541 expr
= parse_expression (exp
);
1543 new = (struct display
*) xmalloc (sizeof (struct display
));
1545 new->exp_string
= xstrdup (exp
);
1547 new->block
= innermost_block
;
1548 new->pspace
= current_program_space
;
1549 new->next
= display_chain
;
1550 new->number
= ++display_number
;
1553 display_chain
= new;
1555 if (from_tty
&& target_has_execution
)
1556 do_one_display (new);
1563 free_display (struct display
*d
)
1565 xfree (d
->exp_string
);
1570 /* Clear out the display_chain. Done when new symtabs are loaded,
1571 since this invalidates the types stored in many expressions. */
1574 clear_displays (void)
1578 while ((d
= display_chain
) != NULL
)
1580 display_chain
= d
->next
;
1585 /* Delete the auto-display DISPLAY. */
1588 delete_display (struct display
*display
)
1592 gdb_assert (display
!= NULL
);
1594 if (display_chain
== display
)
1595 display_chain
= display
->next
;
1598 if (d
->next
== display
)
1600 d
->next
= display
->next
;
1604 free_display (display
);
1607 /* Call FUNCTION on each of the displays whose numbers are given in
1608 ARGS. DATA is passed unmodified to FUNCTION. */
1611 map_display_numbers (char *args
,
1612 void (*function
) (struct display
*,
1616 struct get_number_or_range_state state
;
1620 error_no_arg (_("one or more display numbers"));
1622 init_number_or_range (&state
, args
);
1624 while (!state
.finished
)
1626 char *p
= state
.string
;
1628 num
= get_number_or_range (&state
);
1630 warning (_("bad display number at or near '%s'"), p
);
1633 struct display
*d
, *tmp
;
1635 ALL_DISPLAYS_SAFE (d
, tmp
)
1636 if (d
->number
== num
)
1639 printf_unfiltered (_("No display number %d.\n"), num
);
1646 /* Callback for map_display_numbers, that deletes a display. */
1649 do_delete_display (struct display
*d
, void *data
)
1654 /* "undisplay" command. */
1657 undisplay_command (char *args
, int from_tty
)
1661 if (query (_("Delete all auto-display expressions? ")))
1667 map_display_numbers (args
, do_delete_display
, NULL
);
1671 /* Display a single auto-display.
1672 Do nothing if the display cannot be printed in the current context,
1673 or if the display is disabled. */
1676 do_one_display (struct display
*d
)
1678 struct cleanup
*old_chain
;
1679 int within_current_scope
;
1681 if (d
->enabled_p
== 0)
1684 /* The expression carries the architecture that was used at parse time.
1685 This is a problem if the expression depends on architecture features
1686 (e.g. register numbers), and the current architecture is now different.
1687 For example, a display statement like "display/i $pc" is expected to
1688 display the PC register of the current architecture, not the arch at
1689 the time the display command was given. Therefore, we re-parse the
1690 expression if the current architecture has changed. */
1691 if (d
->exp
!= NULL
&& d
->exp
->gdbarch
!= get_current_arch ())
1700 volatile struct gdb_exception ex
;
1702 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1704 innermost_block
= NULL
;
1705 d
->exp
= parse_expression (d
->exp_string
);
1706 d
->block
= innermost_block
;
1710 /* Can't re-parse the expression. Disable this display item. */
1712 warning (_("Unable to display \"%s\": %s"),
1713 d
->exp_string
, ex
.message
);
1720 if (d
->pspace
== current_program_space
)
1721 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1723 within_current_scope
= 0;
1726 within_current_scope
= 1;
1727 if (!within_current_scope
)
1730 old_chain
= make_cleanup_restore_integer (¤t_display_number
);
1731 current_display_number
= d
->number
;
1733 annotate_display_begin ();
1734 printf_filtered ("%d", d
->number
);
1735 annotate_display_number_end ();
1736 printf_filtered (": ");
1739 volatile struct gdb_exception ex
;
1741 annotate_display_format ();
1743 printf_filtered ("x/");
1744 if (d
->format
.count
!= 1)
1745 printf_filtered ("%d", d
->format
.count
);
1746 printf_filtered ("%c", d
->format
.format
);
1747 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1748 printf_filtered ("%c", d
->format
.size
);
1749 printf_filtered (" ");
1751 annotate_display_expression ();
1753 puts_filtered (d
->exp_string
);
1754 annotate_display_expression_end ();
1756 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1757 printf_filtered ("\n");
1759 printf_filtered (" ");
1761 annotate_display_value ();
1763 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1768 val
= evaluate_expression (d
->exp
);
1769 addr
= value_as_address (val
);
1770 if (d
->format
.format
== 'i')
1771 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1772 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1775 fprintf_filtered (gdb_stdout
, _("<error: %s>\n"), ex
.message
);
1779 struct value_print_options opts
;
1780 volatile struct gdb_exception ex
;
1782 annotate_display_format ();
1784 if (d
->format
.format
)
1785 printf_filtered ("/%c ", d
->format
.format
);
1787 annotate_display_expression ();
1789 puts_filtered (d
->exp_string
);
1790 annotate_display_expression_end ();
1792 printf_filtered (" = ");
1794 annotate_display_expression ();
1796 get_formatted_print_options (&opts
, d
->format
.format
);
1797 opts
.raw
= d
->format
.raw
;
1799 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1803 val
= evaluate_expression (d
->exp
);
1804 print_formatted (val
, d
->format
.size
, &opts
, gdb_stdout
);
1807 fprintf_filtered (gdb_stdout
, _("<error: %s>"), ex
.message
);
1808 printf_filtered ("\n");
1811 annotate_display_end ();
1813 gdb_flush (gdb_stdout
);
1814 do_cleanups (old_chain
);
1817 /* Display all of the values on the auto-display chain which can be
1818 evaluated in the current scope. */
1825 for (d
= display_chain
; d
; d
= d
->next
)
1829 /* Delete the auto-display which we were in the process of displaying.
1830 This is done when there is an error or a signal. */
1833 disable_display (int num
)
1837 for (d
= display_chain
; d
; d
= d
->next
)
1838 if (d
->number
== num
)
1843 printf_unfiltered (_("No display number %d.\n"), num
);
1847 disable_current_display (void)
1849 if (current_display_number
>= 0)
1851 disable_display (current_display_number
);
1852 fprintf_unfiltered (gdb_stderr
,
1853 _("Disabling display %d to "
1854 "avoid infinite recursion.\n"),
1855 current_display_number
);
1857 current_display_number
= -1;
1861 display_info (char *ignore
, int from_tty
)
1866 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1868 printf_filtered (_("Auto-display expressions now in effect:\n\
1869 Num Enb Expression\n"));
1871 for (d
= display_chain
; d
; d
= d
->next
)
1873 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1875 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1877 else if (d
->format
.format
)
1878 printf_filtered ("/%c ", d
->format
.format
);
1879 puts_filtered (d
->exp_string
);
1880 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1881 printf_filtered (_(" (cannot be evaluated in the current context)"));
1882 printf_filtered ("\n");
1883 gdb_flush (gdb_stdout
);
1887 /* Callback fo map_display_numbers, that enables or disables the
1888 passed in display D. */
1891 do_enable_disable_display (struct display
*d
, void *data
)
1893 d
->enabled_p
= *(int *) data
;
1896 /* Implamentation of both the "disable display" and "enable display"
1897 commands. ENABLE decides what to do. */
1900 enable_disable_display_command (char *args
, int from_tty
, int enable
)
1907 d
->enabled_p
= enable
;
1911 map_display_numbers (args
, do_enable_disable_display
, &enable
);
1914 /* The "enable display" command. */
1917 enable_display_command (char *args
, int from_tty
)
1919 enable_disable_display_command (args
, from_tty
, 1);
1922 /* The "disable display" command. */
1925 disable_display_command (char *args
, int from_tty
)
1927 enable_disable_display_command (args
, from_tty
, 0);
1930 /* display_chain items point to blocks and expressions. Some expressions in
1931 turn may point to symbols.
1932 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1933 obstack_free'd when a shared library is unloaded.
1934 Clear pointers that are about to become dangling.
1935 Both .exp and .block fields will be restored next time we need to display
1936 an item by re-parsing .exp_string field in the new execution context. */
1939 clear_dangling_display_expressions (struct so_list
*solib
)
1941 struct objfile
*objfile
= solib
->objfile
;
1944 /* With no symbol file we cannot have a block or expression from it. */
1945 if (objfile
== NULL
)
1947 if (objfile
->separate_debug_objfile_backlink
)
1948 objfile
= objfile
->separate_debug_objfile_backlink
;
1949 gdb_assert (objfile
->pspace
== solib
->pspace
);
1951 for (d
= display_chain
; d
!= NULL
; d
= d
->next
)
1953 if (d
->pspace
!= solib
->pspace
)
1956 if (lookup_objfile_from_block (d
->block
) == objfile
1957 || (d
->exp
&& exp_uses_objfile (d
->exp
, objfile
)))
1967 /* Print the value in stack frame FRAME of a variable specified by a
1968 struct symbol. NAME is the name to print; if NULL then VAR's print
1969 name will be used. STREAM is the ui_file on which to print the
1970 value. INDENT specifies the number of indent levels to print
1971 before printing the variable name.
1973 This function invalidates FRAME. */
1976 print_variable_and_value (const char *name
, struct symbol
*var
,
1977 struct frame_info
*frame
,
1978 struct ui_file
*stream
, int indent
)
1980 volatile struct gdb_exception except
;
1983 name
= SYMBOL_PRINT_NAME (var
);
1985 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1986 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1989 struct value_print_options opts
;
1991 val
= read_var_value (var
, frame
);
1992 get_user_print_options (&opts
);
1994 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1996 /* common_val_print invalidates FRAME when a pretty printer calls inferior
2000 if (except
.reason
< 0)
2001 fprintf_filtered(stream
, "<error reading variable %s (%s)>", name
,
2003 fprintf_filtered (stream
, "\n");
2006 /* Subroutine of ui_printf to simplify it.
2007 Print VALUE to STREAM using FORMAT.
2008 VALUE is a C-style string on the target. */
2011 printf_c_string (struct ui_file
*stream
, const char *format
,
2012 struct value
*value
)
2018 tem
= value_as_address (value
);
2020 /* This is a %s argument. Find the length of the string. */
2026 read_memory (tem
+ j
, &c
, 1);
2031 /* Copy the string contents into a string inside GDB. */
2032 str
= (gdb_byte
*) alloca (j
+ 1);
2034 read_memory (tem
, str
, j
);
2037 fprintf_filtered (stream
, format
, (char *) str
);
2040 /* Subroutine of ui_printf to simplify it.
2041 Print VALUE to STREAM using FORMAT.
2042 VALUE is a wide C-style string on the target. */
2045 printf_wide_c_string (struct ui_file
*stream
, const char *format
,
2046 struct value
*value
)
2051 struct gdbarch
*gdbarch
= get_type_arch (value_type (value
));
2052 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2053 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2054 "wchar_t", NULL
, 0);
2055 int wcwidth
= TYPE_LENGTH (wctype
);
2056 gdb_byte
*buf
= alloca (wcwidth
);
2057 struct obstack output
;
2058 struct cleanup
*inner_cleanup
;
2060 tem
= value_as_address (value
);
2062 /* This is a %s argument. Find the length of the string. */
2063 for (j
= 0;; j
+= wcwidth
)
2066 read_memory (tem
+ j
, buf
, wcwidth
);
2067 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2071 /* Copy the string contents into a string inside GDB. */
2072 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2074 read_memory (tem
, str
, j
);
2075 memset (&str
[j
], 0, wcwidth
);
2077 obstack_init (&output
);
2078 inner_cleanup
= make_cleanup_obstack_free (&output
);
2080 convert_between_encodings (target_wide_charset (gdbarch
),
2083 &output
, translit_char
);
2084 obstack_grow_str0 (&output
, "");
2086 fprintf_filtered (stream
, format
, obstack_base (&output
));
2087 do_cleanups (inner_cleanup
);
2090 /* Subroutine of ui_printf to simplify it.
2091 Print VALUE, a decimal floating point value, to STREAM using FORMAT. */
2094 printf_decfloat (struct ui_file
*stream
, const char *format
,
2095 struct value
*value
)
2097 const gdb_byte
*param_ptr
= value_contents (value
);
2099 #if defined (PRINTF_HAS_DECFLOAT)
2100 /* If we have native support for Decimal floating
2101 printing, handle it here. */
2102 fprintf_filtered (stream
, format
, param_ptr
);
2104 /* As a workaround until vasprintf has native support for DFP
2105 we convert the DFP values to string and print them using
2106 the %s format specifier. */
2109 /* Parameter data. */
2110 struct type
*param_type
= value_type (value
);
2111 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2112 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2114 /* DFP output data. */
2115 struct value
*dfp_value
= NULL
;
2119 struct type
*dfp_type
= NULL
;
2120 char decstr
[MAX_DECIMAL_STRING
];
2122 /* Points to the end of the string so that we can go back
2123 and check for DFP length modifiers. */
2124 p
= format
+ strlen (format
);
2126 /* Look for the float/double format specifier. */
2127 while (*p
!= 'f' && *p
!= 'e' && *p
!= 'E'
2128 && *p
!= 'g' && *p
!= 'G')
2131 /* Search for the '%' char and extract the size and type of
2132 the output decimal value based on its modifiers
2133 (%Hf, %Df, %DDf). */
2139 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2141 else if (*p
== 'D' && *(p
- 1) == 'D')
2144 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2150 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2154 /* Conversion between different DFP types. */
2155 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2156 decimal_convert (param_ptr
, TYPE_LENGTH (param_type
),
2157 byte_order
, dec
, dfp_len
, byte_order
);
2159 /* If this is a non-trivial conversion, just output 0.
2160 A correct converted value can be displayed by explicitly
2161 casting to a DFP type. */
2162 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2164 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2166 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2168 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2170 /* Print the DFP value. */
2171 fprintf_filtered (stream
, "%s", decstr
);
2175 /* Subroutine of ui_printf to simplify it.
2176 Print VALUE, a target pointer, to STREAM using FORMAT. */
2179 printf_pointer (struct ui_file
*stream
, const char *format
,
2180 struct value
*value
)
2182 /* We avoid the host's %p because pointers are too
2183 likely to be the wrong size. The only interesting
2184 modifier for %p is a width; extract that, and then
2185 handle %p as glibc would: %#x or a literal "(nil)". */
2189 #ifdef PRINTF_HAS_LONG_LONG
2190 long long val
= value_as_long (value
);
2192 long val
= value_as_long (value
);
2195 fmt
= alloca (strlen (format
) + 5);
2197 /* Copy up to the leading %. */
2202 int is_percent
= (*p
== '%');
2217 /* Copy any width. */
2218 while (*p
>= '0' && *p
< '9')
2221 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2224 #ifdef PRINTF_HAS_LONG_LONG
2230 fprintf_filtered (stream
, fmt
, val
);
2236 fprintf_filtered (stream
, fmt
, "(nil)");
2240 /* printf "printf format string" ARG to STREAM. */
2243 ui_printf (const char *arg
, struct ui_file
*stream
)
2245 struct format_piece
*fpieces
;
2246 const char *s
= arg
;
2247 struct value
**val_args
;
2248 int allocated_args
= 20;
2249 struct cleanup
*old_cleanups
;
2251 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
2252 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2255 error_no_arg (_("format-control string and values to print"));
2257 s
= skip_spaces_const (s
);
2259 /* A format string should follow, enveloped in double quotes. */
2261 error (_("Bad format string, missing '\"'."));
2263 fpieces
= parse_format_string (&s
);
2265 make_cleanup (free_format_pieces_cleanup
, &fpieces
);
2268 error (_("Bad format string, non-terminated '\"'."));
2270 s
= skip_spaces_const (s
);
2272 if (*s
!= ',' && *s
!= 0)
2273 error (_("Invalid argument syntax"));
2277 s
= skip_spaces_const (s
);
2283 char *current_substring
;
2286 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2287 if (fpieces
[fr
].argclass
!= literal_piece
)
2290 /* Now, parse all arguments and evaluate them.
2291 Store the VALUEs in VAL_ARGS. */
2297 if (nargs
== allocated_args
)
2298 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2299 (allocated_args
*= 2)
2300 * sizeof (struct value
*));
2302 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2310 if (nargs
!= nargs_wanted
)
2311 error (_("Wrong number of arguments for specified format-string"));
2313 /* Now actually print them. */
2315 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2317 current_substring
= fpieces
[fr
].string
;
2318 switch (fpieces
[fr
].argclass
)
2321 printf_c_string (stream
, current_substring
, val_args
[i
]);
2323 case wide_string_arg
:
2324 printf_wide_c_string (stream
, current_substring
, val_args
[i
]);
2328 struct gdbarch
*gdbarch
2329 = get_type_arch (value_type (val_args
[i
]));
2330 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2331 "wchar_t", NULL
, 0);
2332 struct type
*valtype
;
2333 struct obstack output
;
2334 struct cleanup
*inner_cleanup
;
2335 const gdb_byte
*bytes
;
2337 valtype
= value_type (val_args
[i
]);
2338 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2339 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2340 error (_("expected wchar_t argument for %%lc"));
2342 bytes
= value_contents (val_args
[i
]);
2344 obstack_init (&output
);
2345 inner_cleanup
= make_cleanup_obstack_free (&output
);
2347 convert_between_encodings (target_wide_charset (gdbarch
),
2349 bytes
, TYPE_LENGTH (valtype
),
2350 TYPE_LENGTH (valtype
),
2351 &output
, translit_char
);
2352 obstack_grow_str0 (&output
, "");
2354 fprintf_filtered (stream
, current_substring
,
2355 obstack_base (&output
));
2356 do_cleanups (inner_cleanup
);
2361 struct type
*type
= value_type (val_args
[i
]);
2365 /* If format string wants a float, unchecked-convert the value
2366 to floating point of the same size. */
2367 type
= float_type_from_length (type
);
2368 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2370 error (_("Invalid floating value found in program."));
2372 fprintf_filtered (stream
, current_substring
, (double) val
);
2375 case long_double_arg
:
2376 #ifdef HAVE_LONG_DOUBLE
2378 struct type
*type
= value_type (val_args
[i
]);
2382 /* If format string wants a float, unchecked-convert the value
2383 to floating point of the same size. */
2384 type
= float_type_from_length (type
);
2385 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2387 error (_("Invalid floating value found in program."));
2389 fprintf_filtered (stream
, current_substring
,
2394 error (_("long double not supported in printf"));
2397 #ifdef PRINTF_HAS_LONG_LONG
2399 long long val
= value_as_long (val_args
[i
]);
2401 fprintf_filtered (stream
, current_substring
, val
);
2405 error (_("long long not supported in printf"));
2409 int val
= value_as_long (val_args
[i
]);
2411 fprintf_filtered (stream
, current_substring
, val
);
2416 long val
= value_as_long (val_args
[i
]);
2418 fprintf_filtered (stream
, current_substring
, val
);
2421 /* Handles decimal floating values. */
2423 printf_decfloat (stream
, current_substring
, val_args
[i
]);
2426 printf_pointer (stream
, current_substring
, val_args
[i
]);
2429 /* Print a portion of the format string that has no
2430 directives. Note that this will not include any
2431 ordinary %-specs, but it might include "%%". That is
2432 why we use printf_filtered and not puts_filtered here.
2433 Also, we pass a dummy argument because some platforms
2434 have modified GCC to include -Wformat-security by
2435 default, which will warn here if there is no
2437 fprintf_filtered (stream
, current_substring
, 0);
2440 internal_error (__FILE__
, __LINE__
,
2441 _("failed internal consistency check"));
2443 /* Maybe advance to the next argument. */
2444 if (fpieces
[fr
].argclass
!= literal_piece
)
2448 do_cleanups (old_cleanups
);
2451 /* Implement the "printf" command. */
2454 printf_command (char *arg
, int from_tty
)
2456 ui_printf (arg
, gdb_stdout
);
2459 /* Implement the "eval" command. */
2462 eval_command (char *arg
, int from_tty
)
2464 struct ui_file
*ui_out
= mem_fileopen ();
2465 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (ui_out
);
2468 ui_printf (arg
, ui_out
);
2470 expanded
= ui_file_xstrdup (ui_out
, NULL
);
2471 make_cleanup (xfree
, expanded
);
2473 execute_command (expanded
, from_tty
);
2475 do_cleanups (cleanups
);
2479 _initialize_printcmd (void)
2481 struct cmd_list_element
*c
;
2483 current_display_number
= -1;
2485 observer_attach_solib_unloaded (clear_dangling_display_expressions
);
2487 add_info ("address", address_info
,
2488 _("Describe where symbol SYM is stored."));
2490 add_info ("symbol", sym_info
, _("\
2491 Describe what symbol is at location ADDR.\n\
2492 Only for symbols with fixed locations (global or static scope)."));
2494 add_com ("x", class_vars
, x_command
, _("\
2495 Examine memory: x/FMT ADDRESS.\n\
2496 ADDRESS is an expression for the memory address to examine.\n\
2497 FMT is a repeat count followed by a format letter and a size letter.\n\
2498 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2499 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2500 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2501 The specified number of objects of the specified size are printed\n\
2502 according to the format.\n\n\
2503 Defaults for format and size letters are those previously used.\n\
2504 Default count is 1. Default address is following last thing printed\n\
2505 with this command or \"print\"."));
2508 add_com ("whereis", class_vars
, whereis_command
,
2509 _("Print line number and file of definition of variable."));
2512 add_info ("display", display_info
, _("\
2513 Expressions to display when program stops, with code numbers."));
2515 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2516 Cancel some expressions to be displayed when program stops.\n\
2517 Arguments are the code numbers of the expressions to stop displaying.\n\
2518 No argument means cancel all automatic-display expressions.\n\
2519 \"delete display\" has the same effect as this command.\n\
2520 Do \"info display\" to see current list of code numbers."),
2523 add_com ("display", class_vars
, display_command
, _("\
2524 Print value of expression EXP each time the program stops.\n\
2525 /FMT may be used before EXP as in the \"print\" command.\n\
2526 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2527 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2528 and examining is done as in the \"x\" command.\n\n\
2529 With no argument, display all currently requested auto-display expressions.\n\
2530 Use \"undisplay\" to cancel display requests previously made."));
2532 add_cmd ("display", class_vars
, enable_display_command
, _("\
2533 Enable some expressions to be displayed when program stops.\n\
2534 Arguments are the code numbers of the expressions to resume displaying.\n\
2535 No argument means enable all automatic-display expressions.\n\
2536 Do \"info display\" to see current list of code numbers."), &enablelist
);
2538 add_cmd ("display", class_vars
, disable_display_command
, _("\
2539 Disable some expressions to be displayed when program stops.\n\
2540 Arguments are the code numbers of the expressions to stop displaying.\n\
2541 No argument means disable all automatic-display expressions.\n\
2542 Do \"info display\" to see current list of code numbers."), &disablelist
);
2544 add_cmd ("display", class_vars
, undisplay_command
, _("\
2545 Cancel some expressions to be displayed when program stops.\n\
2546 Arguments are the code numbers of the expressions to stop displaying.\n\
2547 No argument means cancel all automatic-display expressions.\n\
2548 Do \"info display\" to see current list of code numbers."), &deletelist
);
2550 add_com ("printf", class_vars
, printf_command
, _("\
2551 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2552 This is useful for formatted output in user-defined commands."));
2554 add_com ("output", class_vars
, output_command
, _("\
2555 Like \"print\" but don't put in value history and don't print newline.\n\
2556 This is useful in user-defined commands."));
2558 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2559 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2560 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2561 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2562 with $), a register (a few standard names starting with $), or an actual\n\
2563 variable in the program being debugged. EXP is any valid expression.\n\
2564 Use \"set variable\" for variables with names identical to set subcommands.\n\
2566 With a subcommand, this command modifies parts of the gdb environment.\n\
2567 You can see these environment settings with the \"show\" command."),
2568 &setlist
, "set ", 1, &cmdlist
);
2570 add_com ("assign", class_vars
, set_command
, _("\
2571 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2572 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2573 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2574 with $), a register (a few standard names starting with $), or an actual\n\
2575 variable in the program being debugged. EXP is any valid expression.\n\
2576 Use \"set variable\" for variables with names identical to set subcommands.\n\
2577 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2578 You can see these environment settings with the \"show\" command."));
2580 /* "call" is the same as "set", but handy for dbx users to call fns. */
2581 c
= add_com ("call", class_vars
, call_command
, _("\
2582 Call a function in the program.\n\
2583 The argument is the function name and arguments, in the notation of the\n\
2584 current working language. The result is printed and saved in the value\n\
2585 history, if it is not void."));
2586 set_cmd_completer (c
, expression_completer
);
2588 add_cmd ("variable", class_vars
, set_command
, _("\
2589 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2590 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2591 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2592 with $), a register (a few standard names starting with $), or an actual\n\
2593 variable in the program being debugged. EXP is any valid expression.\n\
2594 This may usually be abbreviated to simply \"set\"."),
2597 c
= add_com ("print", class_vars
, print_command
, _("\
2598 Print value of expression EXP.\n\
2599 Variables accessible are those of the lexical environment of the selected\n\
2600 stack frame, plus all those whose scope is global or an entire file.\n\
2602 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2603 $$NUM refers to NUM'th value back from the last one.\n\
2604 Names starting with $ refer to registers (with the values they would have\n\
2605 if the program were to return to the stack frame now selected, restoring\n\
2606 all registers saved by frames farther in) or else to debugger\n\
2607 \"convenience\" variables (any such name not a known register).\n\
2608 Use assignment expressions to give values to convenience variables.\n\
2610 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2611 @ is a binary operator for treating consecutive data objects\n\
2612 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2613 element is FOO, whose second element is stored in the space following\n\
2614 where FOO is stored, etc. FOO must be an expression whose value\n\
2615 resides in memory.\n\
2617 EXP may be preceded with /FMT, where FMT is a format letter\n\
2618 but no count or size letter (see \"x\" command)."));
2619 set_cmd_completer (c
, expression_completer
);
2620 add_com_alias ("p", "print", class_vars
, 1);
2621 add_com_alias ("inspect", "print", class_vars
, 1);
2623 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2624 &max_symbolic_offset
, _("\
2625 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2626 Show the largest offset that will be printed in <symbol+1234> form."), _("\
2627 Tell GDB to only display the symbolic form of an address if the\n\
2628 offset between the closest earlier symbol and the address is less than\n\
2629 the specified maximum offset. The default is \"unlimited\", which tells GDB\n\
2630 to always print the symbolic form of an address if any symbol precedes\n\
2631 it. Zero is equivalent to \"unlimited\"."),
2633 show_max_symbolic_offset
,
2634 &setprintlist
, &showprintlist
);
2635 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2636 &print_symbol_filename
, _("\
2637 Set printing of source filename and line number with <symbol>."), _("\
2638 Show printing of source filename and line number with <symbol>."), NULL
,
2640 show_print_symbol_filename
,
2641 &setprintlist
, &showprintlist
);
2643 add_com ("eval", no_class
, eval_command
, _("\
2644 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2645 a command line, and call it."));