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 /* The msymbol is closer to the address than the symbol;
693 use the msymbol instead. */
695 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
696 if (do_demangle
|| asm_demangle
)
697 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
699 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
702 if (symbol
== NULL
&& msymbol
== NULL
)
705 /* If the nearest symbol is too far away, don't print anything symbolic. */
707 /* For when CORE_ADDR is larger than unsigned int, we do math in
708 CORE_ADDR. But when we detect unsigned wraparound in the
709 CORE_ADDR math, we ignore this test and print the offset,
710 because addr+max_symbolic_offset has wrapped through the end
711 of the address space back to the beginning, giving bogus comparison. */
712 if (addr
> name_location
+ max_symbolic_offset
713 && name_location
+ max_symbolic_offset
> name_location
)
716 *offset
= addr
- name_location
;
718 *name
= xstrdup (name_temp
);
720 if (print_symbol_filename
)
722 struct symtab_and_line sal
;
724 sal
= find_pc_sect_line (addr
, section
, 0);
728 *filename
= xstrdup (symtab_to_filename_for_display (sal
.symtab
));
736 /* Print address ADDR symbolically on STREAM.
737 First print it as a number. Then perhaps print
738 <SYMBOL + OFFSET> after the number. */
741 print_address (struct gdbarch
*gdbarch
,
742 CORE_ADDR addr
, struct ui_file
*stream
)
744 fputs_filtered (paddress (gdbarch
, addr
), stream
);
745 print_address_symbolic (gdbarch
, addr
, stream
, asm_demangle
, " ");
748 /* Return a prefix for instruction address:
749 "=> " for current instruction, else " ". */
752 pc_prefix (CORE_ADDR addr
)
754 if (has_stack_frames ())
756 struct frame_info
*frame
;
759 frame
= get_selected_frame (NULL
);
760 if (get_frame_pc_if_available (frame
, &pc
) && pc
== addr
)
766 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
767 controls whether to print the symbolic name "raw" or demangled.
768 Return non-zero if anything was printed; zero otherwise. */
771 print_address_demangle (const struct value_print_options
*opts
,
772 struct gdbarch
*gdbarch
, CORE_ADDR addr
,
773 struct ui_file
*stream
, int do_demangle
)
775 if (opts
->addressprint
)
777 fputs_filtered (paddress (gdbarch
, addr
), stream
);
778 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, " ");
782 return print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, "");
788 /* Examine data at address ADDR in format FMT.
789 Fetch it from memory and print on gdb_stdout. */
792 do_examine (struct format_data fmt
, struct gdbarch
*gdbarch
, CORE_ADDR addr
)
797 struct type
*val_type
= NULL
;
800 struct value_print_options opts
;
805 next_gdbarch
= gdbarch
;
808 /* Instruction format implies fetch single bytes
809 regardless of the specified size.
810 The case of strings is handled in decode_format, only explicit
811 size operator are not changed to 'b'. */
817 /* Pick the appropriate size for an address. */
818 if (gdbarch_ptr_bit (next_gdbarch
) == 64)
820 else if (gdbarch_ptr_bit (next_gdbarch
) == 32)
822 else if (gdbarch_ptr_bit (next_gdbarch
) == 16)
825 /* Bad value for gdbarch_ptr_bit. */
826 internal_error (__FILE__
, __LINE__
,
827 _("failed internal consistency check"));
831 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
832 else if (size
== 'h')
833 val_type
= builtin_type (next_gdbarch
)->builtin_int16
;
834 else if (size
== 'w')
835 val_type
= builtin_type (next_gdbarch
)->builtin_int32
;
836 else if (size
== 'g')
837 val_type
= builtin_type (next_gdbarch
)->builtin_int64
;
841 struct type
*char_type
= NULL
;
843 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
844 if type is not found. */
846 char_type
= builtin_type (next_gdbarch
)->builtin_char16
;
847 else if (size
== 'w')
848 char_type
= builtin_type (next_gdbarch
)->builtin_char32
;
850 val_type
= char_type
;
853 if (size
!= '\0' && size
!= 'b')
854 warning (_("Unable to display strings with "
855 "size '%c', using 'b' instead."), size
);
857 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
866 if (format
== 's' || format
== 'i')
869 get_formatted_print_options (&opts
, format
);
871 /* Print as many objects as specified in COUNT, at most maxelts per line,
872 with the address of the next one at the start of each line. */
878 fputs_filtered (pc_prefix (next_address
), gdb_stdout
);
879 print_address (next_gdbarch
, next_address
, gdb_stdout
);
880 printf_filtered (":");
885 printf_filtered ("\t");
886 /* Note that print_formatted sets next_address for the next
888 last_examine_address
= next_address
;
890 if (last_examine_value
)
891 value_free (last_examine_value
);
893 /* The value to be displayed is not fetched greedily.
894 Instead, to avoid the possibility of a fetched value not
895 being used, its retrieval is delayed until the print code
896 uses it. When examining an instruction stream, the
897 disassembler will perform its own memory fetch using just
898 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
899 the disassembler be modified so that LAST_EXAMINE_VALUE
900 is left with the byte sequence from the last complete
901 instruction fetched from memory? */
902 last_examine_value
= value_at_lazy (val_type
, next_address
);
904 if (last_examine_value
)
905 release_value (last_examine_value
);
907 print_formatted (last_examine_value
, size
, &opts
, gdb_stdout
);
909 /* Display any branch delay slots following the final insn. */
910 if (format
== 'i' && count
== 1)
911 count
+= branch_delay_insns
;
913 printf_filtered ("\n");
914 gdb_flush (gdb_stdout
);
919 validate_format (struct format_data fmt
, char *cmdname
)
922 error (_("Size letters are meaningless in \"%s\" command."), cmdname
);
924 error (_("Item count other than 1 is meaningless in \"%s\" command."),
926 if (fmt
.format
== 'i')
927 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
928 fmt
.format
, cmdname
);
931 /* Evaluate string EXP as an expression in the current language and
932 print the resulting value. EXP may contain a format specifier as the
933 first argument ("/x myvar" for example, to print myvar in hex). */
936 print_command_1 (const char *exp
, int voidprint
)
938 struct expression
*expr
;
939 struct cleanup
*old_chain
= 0;
942 struct format_data fmt
;
945 if (exp
&& *exp
== '/')
948 fmt
= decode_format (&exp
, last_format
, 0);
949 validate_format (fmt
, "print");
950 last_format
= format
= fmt
.format
;
962 expr
= parse_expression (exp
);
963 old_chain
= make_cleanup (free_current_contents
, &expr
);
965 val
= evaluate_expression (expr
);
968 val
= access_value_history (0);
970 if (voidprint
|| (val
&& value_type (val
) &&
971 TYPE_CODE (value_type (val
)) != TYPE_CODE_VOID
))
973 struct value_print_options opts
;
974 int histindex
= record_latest_value (val
);
977 annotate_value_history_begin (histindex
, value_type (val
));
979 annotate_value_begin (value_type (val
));
982 printf_filtered ("$%d = ", histindex
);
985 annotate_value_history_value ();
987 get_formatted_print_options (&opts
, format
);
990 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
991 printf_filtered ("\n");
994 annotate_value_history_end ();
996 annotate_value_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
- SYMBOL_VALUE_ADDRESS (msymbol
);
1127 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1128 sec_name
= osect
->the_bfd_section
->name
;
1129 msym_name
= SYMBOL_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
&& osect
->objfile
->name
);
1143 obj_name
= osect
->objfile
->name
;
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 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_minimal_symbol (exp
, NULL
, NULL
);
1220 if (msymbol
!= NULL
)
1222 gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
1223 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1225 printf_filtered ("Symbol \"");
1226 fprintf_symbol_filtered (gdb_stdout
, exp
,
1227 current_language
->la_language
, DMGL_ANSI
);
1228 printf_filtered ("\" is at ");
1229 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1230 printf_filtered (" in a file compiled without debugging");
1231 section
= SYMBOL_OBJ_SECTION (msymbol
);
1232 if (section_is_overlay (section
))
1234 load_addr
= overlay_unmapped_address (load_addr
, section
);
1235 printf_filtered (",\n -- loaded at ");
1236 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1237 printf_filtered (" in overlay section %s",
1238 section
->the_bfd_section
->name
);
1240 printf_filtered (".\n");
1243 error (_("No symbol \"%s\" in current context."), exp
);
1247 printf_filtered ("Symbol \"");
1248 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1249 current_language
->la_language
, DMGL_ANSI
);
1250 printf_filtered ("\" is ");
1251 val
= SYMBOL_VALUE (sym
);
1252 section
= SYMBOL_OBJ_SECTION (sym
);
1253 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1255 if (SYMBOL_COMPUTED_OPS (sym
) != NULL
)
1257 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, context_pc
,
1259 printf_filtered (".\n");
1263 switch (SYMBOL_CLASS (sym
))
1266 case LOC_CONST_BYTES
:
1267 printf_filtered ("constant");
1271 printf_filtered ("a label at address ");
1272 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1273 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1274 if (section_is_overlay (section
))
1276 load_addr
= overlay_unmapped_address (load_addr
, section
);
1277 printf_filtered (",\n -- loaded at ");
1278 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1279 printf_filtered (" in overlay section %s",
1280 section
->the_bfd_section
->name
);
1285 gdb_assert_not_reached (_("LOC_COMPUTED variable missing a method"));
1288 /* GDBARCH is the architecture associated with the objfile the symbol
1289 is defined in; the target architecture may be different, and may
1290 provide additional registers. However, we do not know the target
1291 architecture at this point. We assume the objfile architecture
1292 will contain all the standard registers that occur in debug info
1294 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1296 if (SYMBOL_IS_ARGUMENT (sym
))
1297 printf_filtered (_("an argument in register %s"),
1298 gdbarch_register_name (gdbarch
, regno
));
1300 printf_filtered (_("a variable in register %s"),
1301 gdbarch_register_name (gdbarch
, regno
));
1305 printf_filtered (_("static storage at address "));
1306 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1307 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1308 if (section_is_overlay (section
))
1310 load_addr
= overlay_unmapped_address (load_addr
, section
);
1311 printf_filtered (_(",\n -- loaded at "));
1312 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1313 printf_filtered (_(" in overlay section %s"),
1314 section
->the_bfd_section
->name
);
1318 case LOC_REGPARM_ADDR
:
1319 /* Note comment at LOC_REGISTER. */
1320 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1321 printf_filtered (_("address of an argument in register %s"),
1322 gdbarch_register_name (gdbarch
, regno
));
1326 printf_filtered (_("an argument at offset %ld"), val
);
1330 printf_filtered (_("a local variable at frame offset %ld"), val
);
1334 printf_filtered (_("a reference argument at offset %ld"), val
);
1338 printf_filtered (_("a typedef"));
1342 printf_filtered (_("a function at address "));
1343 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1344 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1345 if (section_is_overlay (section
))
1347 load_addr
= overlay_unmapped_address (load_addr
, section
);
1348 printf_filtered (_(",\n -- loaded at "));
1349 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1350 printf_filtered (_(" in overlay section %s"),
1351 section
->the_bfd_section
->name
);
1355 case LOC_UNRESOLVED
:
1357 struct minimal_symbol
*msym
;
1359 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, NULL
);
1361 printf_filtered ("unresolved");
1364 section
= SYMBOL_OBJ_SECTION (msym
);
1365 load_addr
= SYMBOL_VALUE_ADDRESS (msym
);
1368 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1369 printf_filtered (_("a thread-local variable at offset %s "
1370 "in the thread-local storage for `%s'"),
1371 paddress (gdbarch
, load_addr
),
1372 section
->objfile
->name
);
1375 printf_filtered (_("static storage at address "));
1376 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1377 if (section_is_overlay (section
))
1379 load_addr
= overlay_unmapped_address (load_addr
, section
);
1380 printf_filtered (_(",\n -- loaded at "));
1381 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1382 printf_filtered (_(" in overlay section %s"),
1383 section
->the_bfd_section
->name
);
1390 case LOC_OPTIMIZED_OUT
:
1391 printf_filtered (_("optimized out"));
1395 printf_filtered (_("of unknown (botched) type"));
1398 printf_filtered (".\n");
1403 x_command (char *exp
, int from_tty
)
1405 struct expression
*expr
;
1406 struct format_data fmt
;
1407 struct cleanup
*old_chain
;
1410 fmt
.format
= last_format
? last_format
: 'x';
1411 fmt
.size
= last_size
;
1415 if (exp
&& *exp
== '/')
1417 const char *tmp
= exp
+ 1;
1419 fmt
= decode_format (&tmp
, last_format
, last_size
);
1423 /* If we have an expression, evaluate it and use it as the address. */
1425 if (exp
!= 0 && *exp
!= 0)
1427 expr
= parse_expression (exp
);
1428 /* Cause expression not to be there any more if this command is
1429 repeated with Newline. But don't clobber a user-defined
1430 command's definition. */
1433 old_chain
= make_cleanup (free_current_contents
, &expr
);
1434 val
= evaluate_expression (expr
);
1435 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1436 val
= coerce_ref (val
);
1437 /* In rvalue contexts, such as this, functions are coerced into
1438 pointers to functions. This makes "x/i main" work. */
1439 if (/* last_format == 'i' && */
1440 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1441 && VALUE_LVAL (val
) == lval_memory
)
1442 next_address
= value_address (val
);
1444 next_address
= value_as_address (val
);
1446 next_gdbarch
= expr
->gdbarch
;
1447 do_cleanups (old_chain
);
1451 error_no_arg (_("starting display address"));
1453 do_examine (fmt
, next_gdbarch
, next_address
);
1455 /* If the examine succeeds, we remember its size and format for next
1456 time. Set last_size to 'b' for strings. */
1457 if (fmt
.format
== 's')
1460 last_size
= fmt
.size
;
1461 last_format
= fmt
.format
;
1463 /* Set a couple of internal variables if appropriate. */
1464 if (last_examine_value
)
1466 /* Make last address examined available to the user as $_. Use
1467 the correct pointer type. */
1468 struct type
*pointer_type
1469 = lookup_pointer_type (value_type (last_examine_value
));
1470 set_internalvar (lookup_internalvar ("_"),
1471 value_from_pointer (pointer_type
,
1472 last_examine_address
));
1474 /* Make contents of last address examined available to the user
1475 as $__. If the last value has not been fetched from memory
1476 then don't fetch it now; instead mark it by voiding the $__
1478 if (value_lazy (last_examine_value
))
1479 clear_internalvar (lookup_internalvar ("__"));
1481 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1486 /* Add an expression to the auto-display chain.
1487 Specify the expression. */
1490 display_command (char *arg
, int from_tty
)
1492 struct format_data fmt
;
1493 struct expression
*expr
;
1494 struct display
*new;
1496 const char *exp
= arg
;
1499 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1501 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1502 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1516 fmt
= decode_format (&exp
, 0, 0);
1517 if (fmt
.size
&& fmt
.format
== 0)
1519 if (fmt
.format
== 'i' || fmt
.format
== 's')
1530 innermost_block
= NULL
;
1531 expr
= parse_expression (exp
);
1533 new = (struct display
*) xmalloc (sizeof (struct display
));
1535 new->exp_string
= xstrdup (exp
);
1537 new->block
= innermost_block
;
1538 new->pspace
= current_program_space
;
1539 new->next
= display_chain
;
1540 new->number
= ++display_number
;
1543 display_chain
= new;
1545 if (from_tty
&& target_has_execution
)
1546 do_one_display (new);
1553 free_display (struct display
*d
)
1555 xfree (d
->exp_string
);
1560 /* Clear out the display_chain. Done when new symtabs are loaded,
1561 since this invalidates the types stored in many expressions. */
1564 clear_displays (void)
1568 while ((d
= display_chain
) != NULL
)
1570 display_chain
= d
->next
;
1575 /* Delete the auto-display DISPLAY. */
1578 delete_display (struct display
*display
)
1582 gdb_assert (display
!= NULL
);
1584 if (display_chain
== display
)
1585 display_chain
= display
->next
;
1588 if (d
->next
== display
)
1590 d
->next
= display
->next
;
1594 free_display (display
);
1597 /* Call FUNCTION on each of the displays whose numbers are given in
1598 ARGS. DATA is passed unmodified to FUNCTION. */
1601 map_display_numbers (char *args
,
1602 void (*function
) (struct display
*,
1606 struct get_number_or_range_state state
;
1610 error_no_arg (_("one or more display numbers"));
1612 init_number_or_range (&state
, args
);
1614 while (!state
.finished
)
1616 char *p
= state
.string
;
1618 num
= get_number_or_range (&state
);
1620 warning (_("bad display number at or near '%s'"), p
);
1623 struct display
*d
, *tmp
;
1625 ALL_DISPLAYS_SAFE (d
, tmp
)
1626 if (d
->number
== num
)
1629 printf_unfiltered (_("No display number %d.\n"), num
);
1636 /* Callback for map_display_numbers, that deletes a display. */
1639 do_delete_display (struct display
*d
, void *data
)
1644 /* "undisplay" command. */
1647 undisplay_command (char *args
, int from_tty
)
1651 if (query (_("Delete all auto-display expressions? ")))
1657 map_display_numbers (args
, do_delete_display
, NULL
);
1661 /* Display a single auto-display.
1662 Do nothing if the display cannot be printed in the current context,
1663 or if the display is disabled. */
1666 do_one_display (struct display
*d
)
1668 struct cleanup
*old_chain
;
1669 int within_current_scope
;
1671 if (d
->enabled_p
== 0)
1674 /* The expression carries the architecture that was used at parse time.
1675 This is a problem if the expression depends on architecture features
1676 (e.g. register numbers), and the current architecture is now different.
1677 For example, a display statement like "display/i $pc" is expected to
1678 display the PC register of the current architecture, not the arch at
1679 the time the display command was given. Therefore, we re-parse the
1680 expression if the current architecture has changed. */
1681 if (d
->exp
!= NULL
&& d
->exp
->gdbarch
!= get_current_arch ())
1690 volatile struct gdb_exception ex
;
1692 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1694 innermost_block
= NULL
;
1695 d
->exp
= parse_expression (d
->exp_string
);
1696 d
->block
= innermost_block
;
1700 /* Can't re-parse the expression. Disable this display item. */
1702 warning (_("Unable to display \"%s\": %s"),
1703 d
->exp_string
, ex
.message
);
1710 if (d
->pspace
== current_program_space
)
1711 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1713 within_current_scope
= 0;
1716 within_current_scope
= 1;
1717 if (!within_current_scope
)
1720 old_chain
= make_cleanup_restore_integer (¤t_display_number
);
1721 current_display_number
= d
->number
;
1723 annotate_display_begin ();
1724 printf_filtered ("%d", d
->number
);
1725 annotate_display_number_end ();
1726 printf_filtered (": ");
1729 volatile struct gdb_exception ex
;
1731 annotate_display_format ();
1733 printf_filtered ("x/");
1734 if (d
->format
.count
!= 1)
1735 printf_filtered ("%d", d
->format
.count
);
1736 printf_filtered ("%c", d
->format
.format
);
1737 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1738 printf_filtered ("%c", d
->format
.size
);
1739 printf_filtered (" ");
1741 annotate_display_expression ();
1743 puts_filtered (d
->exp_string
);
1744 annotate_display_expression_end ();
1746 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1747 printf_filtered ("\n");
1749 printf_filtered (" ");
1751 annotate_display_value ();
1753 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1758 val
= evaluate_expression (d
->exp
);
1759 addr
= value_as_address (val
);
1760 if (d
->format
.format
== 'i')
1761 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1762 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1765 fprintf_filtered (gdb_stdout
, _("<error: %s>\n"), ex
.message
);
1769 struct value_print_options opts
;
1770 volatile struct gdb_exception ex
;
1772 annotate_display_format ();
1774 if (d
->format
.format
)
1775 printf_filtered ("/%c ", d
->format
.format
);
1777 annotate_display_expression ();
1779 puts_filtered (d
->exp_string
);
1780 annotate_display_expression_end ();
1782 printf_filtered (" = ");
1784 annotate_display_expression ();
1786 get_formatted_print_options (&opts
, d
->format
.format
);
1787 opts
.raw
= d
->format
.raw
;
1789 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1793 val
= evaluate_expression (d
->exp
);
1794 print_formatted (val
, d
->format
.size
, &opts
, gdb_stdout
);
1797 fprintf_filtered (gdb_stdout
, _("<error: %s>"), ex
.message
);
1798 printf_filtered ("\n");
1801 annotate_display_end ();
1803 gdb_flush (gdb_stdout
);
1804 do_cleanups (old_chain
);
1807 /* Display all of the values on the auto-display chain which can be
1808 evaluated in the current scope. */
1815 for (d
= display_chain
; d
; d
= d
->next
)
1819 /* Delete the auto-display which we were in the process of displaying.
1820 This is done when there is an error or a signal. */
1823 disable_display (int num
)
1827 for (d
= display_chain
; d
; d
= d
->next
)
1828 if (d
->number
== num
)
1833 printf_unfiltered (_("No display number %d.\n"), num
);
1837 disable_current_display (void)
1839 if (current_display_number
>= 0)
1841 disable_display (current_display_number
);
1842 fprintf_unfiltered (gdb_stderr
,
1843 _("Disabling display %d to "
1844 "avoid infinite recursion.\n"),
1845 current_display_number
);
1847 current_display_number
= -1;
1851 display_info (char *ignore
, int from_tty
)
1856 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1858 printf_filtered (_("Auto-display expressions now in effect:\n\
1859 Num Enb Expression\n"));
1861 for (d
= display_chain
; d
; d
= d
->next
)
1863 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1865 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1867 else if (d
->format
.format
)
1868 printf_filtered ("/%c ", d
->format
.format
);
1869 puts_filtered (d
->exp_string
);
1870 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1871 printf_filtered (_(" (cannot be evaluated in the current context)"));
1872 printf_filtered ("\n");
1873 gdb_flush (gdb_stdout
);
1877 /* Callback fo map_display_numbers, that enables or disables the
1878 passed in display D. */
1881 do_enable_disable_display (struct display
*d
, void *data
)
1883 d
->enabled_p
= *(int *) data
;
1886 /* Implamentation of both the "disable display" and "enable display"
1887 commands. ENABLE decides what to do. */
1890 enable_disable_display_command (char *args
, int from_tty
, int enable
)
1897 d
->enabled_p
= enable
;
1901 map_display_numbers (args
, do_enable_disable_display
, &enable
);
1904 /* The "enable display" command. */
1907 enable_display_command (char *args
, int from_tty
)
1909 enable_disable_display_command (args
, from_tty
, 1);
1912 /* The "disable display" command. */
1915 disable_display_command (char *args
, int from_tty
)
1917 enable_disable_display_command (args
, from_tty
, 0);
1920 /* display_chain items point to blocks and expressions. Some expressions in
1921 turn may point to symbols.
1922 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1923 obstack_free'd when a shared library is unloaded.
1924 Clear pointers that are about to become dangling.
1925 Both .exp and .block fields will be restored next time we need to display
1926 an item by re-parsing .exp_string field in the new execution context. */
1929 clear_dangling_display_expressions (struct so_list
*solib
)
1931 struct objfile
*objfile
= solib
->objfile
;
1934 /* With no symbol file we cannot have a block or expression from it. */
1935 if (objfile
== NULL
)
1937 if (objfile
->separate_debug_objfile_backlink
)
1938 objfile
= objfile
->separate_debug_objfile_backlink
;
1939 gdb_assert (objfile
->pspace
== solib
->pspace
);
1941 for (d
= display_chain
; d
!= NULL
; d
= d
->next
)
1943 if (d
->pspace
!= solib
->pspace
)
1946 if (lookup_objfile_from_block (d
->block
) == objfile
1947 || (d
->exp
&& exp_uses_objfile (d
->exp
, objfile
)))
1957 /* Print the value in stack frame FRAME of a variable specified by a
1958 struct symbol. NAME is the name to print; if NULL then VAR's print
1959 name will be used. STREAM is the ui_file on which to print the
1960 value. INDENT specifies the number of indent levels to print
1961 before printing the variable name.
1963 This function invalidates FRAME. */
1966 print_variable_and_value (const char *name
, struct symbol
*var
,
1967 struct frame_info
*frame
,
1968 struct ui_file
*stream
, int indent
)
1970 volatile struct gdb_exception except
;
1973 name
= SYMBOL_PRINT_NAME (var
);
1975 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1976 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1979 struct value_print_options opts
;
1981 val
= read_var_value (var
, frame
);
1982 get_user_print_options (&opts
);
1984 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1986 /* common_val_print invalidates FRAME when a pretty printer calls inferior
1990 if (except
.reason
< 0)
1991 fprintf_filtered(stream
, "<error reading variable %s (%s)>", name
,
1993 fprintf_filtered (stream
, "\n");
1996 /* Subroutine of ui_printf to simplify it.
1997 Print VALUE to STREAM using FORMAT.
1998 VALUE is a C-style string on the target. */
2001 printf_c_string (struct ui_file
*stream
, const char *format
,
2002 struct value
*value
)
2008 tem
= value_as_address (value
);
2010 /* This is a %s argument. Find the length of the string. */
2016 read_memory (tem
+ j
, &c
, 1);
2021 /* Copy the string contents into a string inside GDB. */
2022 str
= (gdb_byte
*) alloca (j
+ 1);
2024 read_memory (tem
, str
, j
);
2027 fprintf_filtered (stream
, format
, (char *) str
);
2030 /* Subroutine of ui_printf to simplify it.
2031 Print VALUE to STREAM using FORMAT.
2032 VALUE is a wide C-style string on the target. */
2035 printf_wide_c_string (struct ui_file
*stream
, const char *format
,
2036 struct value
*value
)
2041 struct gdbarch
*gdbarch
= get_type_arch (value_type (value
));
2042 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2043 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2044 "wchar_t", NULL
, 0);
2045 int wcwidth
= TYPE_LENGTH (wctype
);
2046 gdb_byte
*buf
= alloca (wcwidth
);
2047 struct obstack output
;
2048 struct cleanup
*inner_cleanup
;
2050 tem
= value_as_address (value
);
2052 /* This is a %s argument. Find the length of the string. */
2053 for (j
= 0;; j
+= wcwidth
)
2056 read_memory (tem
+ j
, buf
, wcwidth
);
2057 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2061 /* Copy the string contents into a string inside GDB. */
2062 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2064 read_memory (tem
, str
, j
);
2065 memset (&str
[j
], 0, wcwidth
);
2067 obstack_init (&output
);
2068 inner_cleanup
= make_cleanup_obstack_free (&output
);
2070 convert_between_encodings (target_wide_charset (gdbarch
),
2073 &output
, translit_char
);
2074 obstack_grow_str0 (&output
, "");
2076 fprintf_filtered (stream
, format
, obstack_base (&output
));
2077 do_cleanups (inner_cleanup
);
2080 /* Subroutine of ui_printf to simplify it.
2081 Print VALUE, a decimal floating point value, to STREAM using FORMAT. */
2084 printf_decfloat (struct ui_file
*stream
, const char *format
,
2085 struct value
*value
)
2087 const gdb_byte
*param_ptr
= value_contents (value
);
2089 #if defined (PRINTF_HAS_DECFLOAT)
2090 /* If we have native support for Decimal floating
2091 printing, handle it here. */
2092 fprintf_filtered (stream
, format
, param_ptr
);
2094 /* As a workaround until vasprintf has native support for DFP
2095 we convert the DFP values to string and print them using
2096 the %s format specifier. */
2099 /* Parameter data. */
2100 struct type
*param_type
= value_type (value
);
2101 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2102 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2104 /* DFP output data. */
2105 struct value
*dfp_value
= NULL
;
2109 struct type
*dfp_type
= NULL
;
2110 char decstr
[MAX_DECIMAL_STRING
];
2112 /* Points to the end of the string so that we can go back
2113 and check for DFP length modifiers. */
2114 p
= format
+ strlen (format
);
2116 /* Look for the float/double format specifier. */
2117 while (*p
!= 'f' && *p
!= 'e' && *p
!= 'E'
2118 && *p
!= 'g' && *p
!= 'G')
2121 /* Search for the '%' char and extract the size and type of
2122 the output decimal value based on its modifiers
2123 (%Hf, %Df, %DDf). */
2129 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2131 else if (*p
== 'D' && *(p
- 1) == 'D')
2134 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2140 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2144 /* Conversion between different DFP types. */
2145 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2146 decimal_convert (param_ptr
, TYPE_LENGTH (param_type
),
2147 byte_order
, dec
, dfp_len
, byte_order
);
2149 /* If this is a non-trivial conversion, just output 0.
2150 A correct converted value can be displayed by explicitly
2151 casting to a DFP type. */
2152 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2154 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2156 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2158 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2160 /* Print the DFP value. */
2161 fprintf_filtered (stream
, "%s", decstr
);
2165 /* Subroutine of ui_printf to simplify it.
2166 Print VALUE, a target pointer, to STREAM using FORMAT. */
2169 printf_pointer (struct ui_file
*stream
, const char *format
,
2170 struct value
*value
)
2172 /* We avoid the host's %p because pointers are too
2173 likely to be the wrong size. The only interesting
2174 modifier for %p is a width; extract that, and then
2175 handle %p as glibc would: %#x or a literal "(nil)". */
2179 #ifdef PRINTF_HAS_LONG_LONG
2180 long long val
= value_as_long (value
);
2182 long val
= value_as_long (value
);
2185 fmt
= alloca (strlen (format
) + 5);
2187 /* Copy up to the leading %. */
2192 int is_percent
= (*p
== '%');
2207 /* Copy any width. */
2208 while (*p
>= '0' && *p
< '9')
2211 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2214 #ifdef PRINTF_HAS_LONG_LONG
2220 fprintf_filtered (stream
, fmt
, val
);
2226 fprintf_filtered (stream
, fmt
, "(nil)");
2230 /* printf "printf format string" ARG to STREAM. */
2233 ui_printf (const char *arg
, struct ui_file
*stream
)
2235 struct format_piece
*fpieces
;
2236 const char *s
= arg
;
2237 struct value
**val_args
;
2238 int allocated_args
= 20;
2239 struct cleanup
*old_cleanups
;
2241 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
2242 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2245 error_no_arg (_("format-control string and values to print"));
2247 s
= skip_spaces_const (s
);
2249 /* A format string should follow, enveloped in double quotes. */
2251 error (_("Bad format string, missing '\"'."));
2253 fpieces
= parse_format_string (&s
);
2255 make_cleanup (free_format_pieces_cleanup
, &fpieces
);
2258 error (_("Bad format string, non-terminated '\"'."));
2260 s
= skip_spaces_const (s
);
2262 if (*s
!= ',' && *s
!= 0)
2263 error (_("Invalid argument syntax"));
2267 s
= skip_spaces_const (s
);
2273 char *current_substring
;
2276 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2277 if (fpieces
[fr
].argclass
!= literal_piece
)
2280 /* Now, parse all arguments and evaluate them.
2281 Store the VALUEs in VAL_ARGS. */
2287 if (nargs
== allocated_args
)
2288 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2289 (allocated_args
*= 2)
2290 * sizeof (struct value
*));
2292 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2300 if (nargs
!= nargs_wanted
)
2301 error (_("Wrong number of arguments for specified format-string"));
2303 /* Now actually print them. */
2305 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2307 current_substring
= fpieces
[fr
].string
;
2308 switch (fpieces
[fr
].argclass
)
2311 printf_c_string (stream
, current_substring
, val_args
[i
]);
2313 case wide_string_arg
:
2314 printf_wide_c_string (stream
, current_substring
, val_args
[i
]);
2318 struct gdbarch
*gdbarch
2319 = get_type_arch (value_type (val_args
[i
]));
2320 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2321 "wchar_t", NULL
, 0);
2322 struct type
*valtype
;
2323 struct obstack output
;
2324 struct cleanup
*inner_cleanup
;
2325 const gdb_byte
*bytes
;
2327 valtype
= value_type (val_args
[i
]);
2328 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2329 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2330 error (_("expected wchar_t argument for %%lc"));
2332 bytes
= value_contents (val_args
[i
]);
2334 obstack_init (&output
);
2335 inner_cleanup
= make_cleanup_obstack_free (&output
);
2337 convert_between_encodings (target_wide_charset (gdbarch
),
2339 bytes
, TYPE_LENGTH (valtype
),
2340 TYPE_LENGTH (valtype
),
2341 &output
, translit_char
);
2342 obstack_grow_str0 (&output
, "");
2344 fprintf_filtered (stream
, current_substring
,
2345 obstack_base (&output
));
2346 do_cleanups (inner_cleanup
);
2351 struct type
*type
= value_type (val_args
[i
]);
2355 /* If format string wants a float, unchecked-convert the value
2356 to floating point of the same size. */
2357 type
= float_type_from_length (type
);
2358 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2360 error (_("Invalid floating value found in program."));
2362 fprintf_filtered (stream
, current_substring
, (double) val
);
2365 case long_double_arg
:
2366 #ifdef HAVE_LONG_DOUBLE
2368 struct type
*type
= value_type (val_args
[i
]);
2372 /* If format string wants a float, unchecked-convert the value
2373 to floating point of the same size. */
2374 type
= float_type_from_length (type
);
2375 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2377 error (_("Invalid floating value found in program."));
2379 fprintf_filtered (stream
, current_substring
,
2384 error (_("long double not supported in printf"));
2387 #ifdef PRINTF_HAS_LONG_LONG
2389 long long val
= value_as_long (val_args
[i
]);
2391 fprintf_filtered (stream
, current_substring
, val
);
2395 error (_("long long not supported in printf"));
2399 int val
= value_as_long (val_args
[i
]);
2401 fprintf_filtered (stream
, current_substring
, val
);
2406 long val
= value_as_long (val_args
[i
]);
2408 fprintf_filtered (stream
, current_substring
, val
);
2411 /* Handles decimal floating values. */
2413 printf_decfloat (stream
, current_substring
, val_args
[i
]);
2416 printf_pointer (stream
, current_substring
, val_args
[i
]);
2419 /* Print a portion of the format string that has no
2420 directives. Note that this will not include any
2421 ordinary %-specs, but it might include "%%". That is
2422 why we use printf_filtered and not puts_filtered here.
2423 Also, we pass a dummy argument because some platforms
2424 have modified GCC to include -Wformat-security by
2425 default, which will warn here if there is no
2427 fprintf_filtered (stream
, current_substring
, 0);
2430 internal_error (__FILE__
, __LINE__
,
2431 _("failed internal consistency check"));
2433 /* Maybe advance to the next argument. */
2434 if (fpieces
[fr
].argclass
!= literal_piece
)
2438 do_cleanups (old_cleanups
);
2441 /* Implement the "printf" command. */
2444 printf_command (char *arg
, int from_tty
)
2446 ui_printf (arg
, gdb_stdout
);
2449 /* Implement the "eval" command. */
2452 eval_command (char *arg
, int from_tty
)
2454 struct ui_file
*ui_out
= mem_fileopen ();
2455 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (ui_out
);
2458 ui_printf (arg
, ui_out
);
2460 expanded
= ui_file_xstrdup (ui_out
, NULL
);
2461 make_cleanup (xfree
, expanded
);
2463 execute_command (expanded
, from_tty
);
2465 do_cleanups (cleanups
);
2469 _initialize_printcmd (void)
2471 struct cmd_list_element
*c
;
2473 current_display_number
= -1;
2475 observer_attach_solib_unloaded (clear_dangling_display_expressions
);
2477 add_info ("address", address_info
,
2478 _("Describe where symbol SYM is stored."));
2480 add_info ("symbol", sym_info
, _("\
2481 Describe what symbol is at location ADDR.\n\
2482 Only for symbols with fixed locations (global or static scope)."));
2484 add_com ("x", class_vars
, x_command
, _("\
2485 Examine memory: x/FMT ADDRESS.\n\
2486 ADDRESS is an expression for the memory address to examine.\n\
2487 FMT is a repeat count followed by a format letter and a size letter.\n\
2488 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2489 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2490 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2491 The specified number of objects of the specified size are printed\n\
2492 according to the format.\n\n\
2493 Defaults for format and size letters are those previously used.\n\
2494 Default count is 1. Default address is following last thing printed\n\
2495 with this command or \"print\"."));
2498 add_com ("whereis", class_vars
, whereis_command
,
2499 _("Print line number and file of definition of variable."));
2502 add_info ("display", display_info
, _("\
2503 Expressions to display when program stops, with code numbers."));
2505 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2506 Cancel some expressions to be displayed when program stops.\n\
2507 Arguments are the code numbers of the expressions to stop displaying.\n\
2508 No argument means cancel all automatic-display expressions.\n\
2509 \"delete display\" has the same effect as this command.\n\
2510 Do \"info display\" to see current list of code numbers."),
2513 add_com ("display", class_vars
, display_command
, _("\
2514 Print value of expression EXP each time the program stops.\n\
2515 /FMT may be used before EXP as in the \"print\" command.\n\
2516 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2517 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2518 and examining is done as in the \"x\" command.\n\n\
2519 With no argument, display all currently requested auto-display expressions.\n\
2520 Use \"undisplay\" to cancel display requests previously made."));
2522 add_cmd ("display", class_vars
, enable_display_command
, _("\
2523 Enable some expressions to be displayed when program stops.\n\
2524 Arguments are the code numbers of the expressions to resume displaying.\n\
2525 No argument means enable all automatic-display expressions.\n\
2526 Do \"info display\" to see current list of code numbers."), &enablelist
);
2528 add_cmd ("display", class_vars
, disable_display_command
, _("\
2529 Disable some expressions to be displayed when program stops.\n\
2530 Arguments are the code numbers of the expressions to stop displaying.\n\
2531 No argument means disable all automatic-display expressions.\n\
2532 Do \"info display\" to see current list of code numbers."), &disablelist
);
2534 add_cmd ("display", class_vars
, undisplay_command
, _("\
2535 Cancel some expressions to be displayed when program stops.\n\
2536 Arguments are the code numbers of the expressions to stop displaying.\n\
2537 No argument means cancel all automatic-display expressions.\n\
2538 Do \"info display\" to see current list of code numbers."), &deletelist
);
2540 add_com ("printf", class_vars
, printf_command
, _("\
2541 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2542 This is useful for formatted output in user-defined commands."));
2544 add_com ("output", class_vars
, output_command
, _("\
2545 Like \"print\" but don't put in value history and don't print newline.\n\
2546 This is useful in user-defined commands."));
2548 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2549 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2550 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2551 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2552 with $), a register (a few standard names starting with $), or an actual\n\
2553 variable in the program being debugged. EXP is any valid expression.\n\
2554 Use \"set variable\" for variables with names identical to set subcommands.\n\
2556 With a subcommand, this command modifies parts of the gdb environment.\n\
2557 You can see these environment settings with the \"show\" command."),
2558 &setlist
, "set ", 1, &cmdlist
);
2560 add_com ("assign", class_vars
, set_command
, _("\
2561 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2562 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2563 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2564 with $), a register (a few standard names starting with $), or an actual\n\
2565 variable in the program being debugged. EXP is any valid expression.\n\
2566 Use \"set variable\" for variables with names identical to set subcommands.\n\
2567 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2568 You can see these environment settings with the \"show\" command."));
2570 /* "call" is the same as "set", but handy for dbx users to call fns. */
2571 c
= add_com ("call", class_vars
, call_command
, _("\
2572 Call a function in the program.\n\
2573 The argument is the function name and arguments, in the notation of the\n\
2574 current working language. The result is printed and saved in the value\n\
2575 history, if it is not void."));
2576 set_cmd_completer (c
, expression_completer
);
2578 add_cmd ("variable", class_vars
, set_command
, _("\
2579 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2580 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2581 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2582 with $), a register (a few standard names starting with $), or an actual\n\
2583 variable in the program being debugged. EXP is any valid expression.\n\
2584 This may usually be abbreviated to simply \"set\"."),
2587 c
= add_com ("print", class_vars
, print_command
, _("\
2588 Print value of expression EXP.\n\
2589 Variables accessible are those of the lexical environment of the selected\n\
2590 stack frame, plus all those whose scope is global or an entire file.\n\
2592 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2593 $$NUM refers to NUM'th value back from the last one.\n\
2594 Names starting with $ refer to registers (with the values they would have\n\
2595 if the program were to return to the stack frame now selected, restoring\n\
2596 all registers saved by frames farther in) or else to debugger\n\
2597 \"convenience\" variables (any such name not a known register).\n\
2598 Use assignment expressions to give values to convenience variables.\n\
2600 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2601 @ is a binary operator for treating consecutive data objects\n\
2602 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2603 element is FOO, whose second element is stored in the space following\n\
2604 where FOO is stored, etc. FOO must be an expression whose value\n\
2605 resides in memory.\n\
2607 EXP may be preceded with /FMT, where FMT is a format letter\n\
2608 but no count or size letter (see \"x\" command)."));
2609 set_cmd_completer (c
, expression_completer
);
2610 add_com_alias ("p", "print", class_vars
, 1);
2611 add_com_alias ("inspect", "print", class_vars
, 1);
2613 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2614 &max_symbolic_offset
, _("\
2615 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2616 Show the largest offset that will be printed in <symbol+1234> form."), NULL
,
2618 show_max_symbolic_offset
,
2619 &setprintlist
, &showprintlist
);
2620 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2621 &print_symbol_filename
, _("\
2622 Set printing of source filename and line number with <symbol>."), _("\
2623 Show printing of source filename and line number with <symbol>."), NULL
,
2625 show_print_symbol_filename
,
2626 &setprintlist
, &showprintlist
);
2628 add_com ("eval", no_class
, eval_command
, _("\
2629 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2630 a command line, and call it."));