1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "gdb_string.h"
27 #include "expression.h"
31 #include "breakpoint.h"
33 #include "gdb-demangle.h"
36 #include "symfile.h" /* for overlay functions */
37 #include "objfiles.h" /* ditto */
38 #include "completer.h" /* for completion functions */
40 #include "gdb_assert.h"
45 #include "exceptions.h"
48 #include "parser-defs.h"
50 #include "arch-utils.h"
51 #include "cli/cli-utils.h"
55 #include "tui/tui.h" /* For tui_active et al. */
64 /* True if the value should be printed raw -- that is, bypassing
65 python-based formatters. */
69 /* Last specified output format. */
71 static char last_format
= 0;
73 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
75 static char last_size
= 'w';
77 /* Default address to examine next, and associated architecture. */
79 static struct gdbarch
*next_gdbarch
;
80 static CORE_ADDR next_address
;
82 /* Number of delay instructions following current disassembled insn. */
84 static int branch_delay_insns
;
86 /* Last address examined. */
88 static CORE_ADDR last_examine_address
;
90 /* Contents of last address examined.
91 This is not valid past the end of the `x' command! */
93 static struct value
*last_examine_value
;
95 /* Largest offset between a symbolic value and an address, that will be
96 printed as `0x1234 <symbol+offset>'. */
98 static unsigned int max_symbolic_offset
= UINT_MAX
;
100 show_max_symbolic_offset (struct ui_file
*file
, int from_tty
,
101 struct cmd_list_element
*c
, const char *value
)
103 fprintf_filtered (file
,
104 _("The largest offset that will be "
105 "printed in <symbol+1234> form is %s.\n"),
109 /* Append the source filename and linenumber of the symbol when
110 printing a symbolic value as `<symbol at filename:linenum>' if set. */
111 static int print_symbol_filename
= 0;
113 show_print_symbol_filename (struct ui_file
*file
, int from_tty
,
114 struct cmd_list_element
*c
, const char *value
)
116 fprintf_filtered (file
, _("Printing of source filename and "
117 "line number with <symbol> is %s.\n"),
121 /* Number of auto-display expression currently being displayed.
122 So that we can disable it if we get a signal within it.
123 -1 when not doing one. */
125 int current_display_number
;
129 /* Chain link to next auto-display item. */
130 struct display
*next
;
132 /* The expression as the user typed it. */
135 /* Expression to be evaluated and displayed. */
136 struct expression
*exp
;
138 /* Item number of this auto-display item. */
141 /* Display format specified. */
142 struct format_data format
;
144 /* Program space associated with `block'. */
145 struct program_space
*pspace
;
147 /* Innermost block required by this expression when evaluated. */
150 /* Status of this display (enabled or disabled). */
154 /* Chain of expressions whose values should be displayed
155 automatically each time the program stops. */
157 static struct display
*display_chain
;
159 static int display_number
;
161 /* Walk the following statement or block through all displays.
162 ALL_DISPLAYS_SAFE does so even if the statement deletes the current
165 #define ALL_DISPLAYS(B) \
166 for (B = display_chain; B; B = B->next)
168 #define ALL_DISPLAYS_SAFE(B,TMP) \
169 for (B = display_chain; \
170 B ? (TMP = B->next, 1): 0; \
173 /* Prototypes for exported functions. */
175 void output_command (char *, int);
177 void _initialize_printcmd (void);
179 /* Prototypes for local functions. */
181 static void do_one_display (struct display
*);
184 /* Decode a format specification. *STRING_PTR should point to it.
185 OFORMAT and OSIZE are used as defaults for the format and size
186 if none are given in the format specification.
187 If OSIZE is zero, then the size field of the returned value
188 should be set only if a size is explicitly specified by the
190 The structure returned describes all the data
191 found in the specification. In addition, *STRING_PTR is advanced
192 past the specification and past all whitespace following it. */
194 static struct format_data
195 decode_format (char **string_ptr
, int oformat
, int osize
)
197 struct format_data val
;
198 char *p
= *string_ptr
;
205 if (*p
>= '0' && *p
<= '9')
206 val
.count
= atoi (p
);
207 while (*p
>= '0' && *p
<= '9')
210 /* Now process size or format letters that follow. */
214 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
221 else if (*p
>= 'a' && *p
<= 'z')
227 while (*p
== ' ' || *p
== '\t')
231 /* Set defaults for format and size if not specified. */
232 if (val
.format
== '?')
236 /* Neither has been specified. */
237 val
.format
= oformat
;
241 /* If a size is specified, any format makes a reasonable
242 default except 'i'. */
243 val
.format
= oformat
== 'i' ? 'x' : oformat
;
245 else if (val
.size
== '?')
249 /* Pick the appropriate size for an address. This is deferred
250 until do_examine when we know the actual architecture to use.
251 A special size value of 'a' is used to indicate this case. */
252 val
.size
= osize
? 'a' : osize
;
255 /* Floating point has to be word or giantword. */
256 if (osize
== 'w' || osize
== 'g')
259 /* Default it to giantword if the last used size is not
261 val
.size
= osize
? 'g' : osize
;
264 /* Characters default to one byte. */
265 val
.size
= osize
? 'b' : osize
;
268 /* Display strings with byte size chars unless explicitly
274 /* The default is the size most recently specified. */
281 /* Print value VAL on stream according to OPTIONS.
282 Do not end with a newline.
283 SIZE is the letter for the size of datum being printed.
284 This is used to pad hex numbers so they line up. SIZE is 0
285 for print / output and set for examine. */
288 print_formatted (struct value
*val
, int size
,
289 const struct value_print_options
*options
,
290 struct ui_file
*stream
)
292 struct type
*type
= check_typedef (value_type (val
));
293 int len
= TYPE_LENGTH (type
);
295 if (VALUE_LVAL (val
) == lval_memory
)
296 next_address
= value_address (val
) + len
;
300 switch (options
->format
)
304 struct type
*elttype
= value_type (val
);
306 next_address
= (value_address (val
)
307 + val_print_string (elttype
, NULL
,
308 value_address (val
), -1,
309 stream
, options
) * len
);
314 /* We often wrap here if there are long symbolic names. */
316 next_address
= (value_address (val
)
317 + gdb_print_insn (get_type_arch (type
),
318 value_address (val
), stream
,
319 &branch_delay_insns
));
324 if (options
->format
== 0 || options
->format
== 's'
325 || TYPE_CODE (type
) == TYPE_CODE_REF
326 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
327 || TYPE_CODE (type
) == TYPE_CODE_STRING
328 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
329 || TYPE_CODE (type
) == TYPE_CODE_UNION
330 || TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
331 value_print (val
, stream
, options
);
333 /* User specified format, so don't look to the type to tell us
335 val_print_scalar_formatted (type
,
336 value_contents_for_printing (val
),
337 value_embedded_offset (val
),
339 options
, size
, stream
);
342 /* Return builtin floating point type of same length as TYPE.
343 If no such type is found, return TYPE itself. */
345 float_type_from_length (struct type
*type
)
347 struct gdbarch
*gdbarch
= get_type_arch (type
);
348 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
349 unsigned int len
= TYPE_LENGTH (type
);
351 if (len
== TYPE_LENGTH (builtin
->builtin_float
))
352 type
= builtin
->builtin_float
;
353 else if (len
== TYPE_LENGTH (builtin
->builtin_double
))
354 type
= builtin
->builtin_double
;
355 else if (len
== TYPE_LENGTH (builtin
->builtin_long_double
))
356 type
= builtin
->builtin_long_double
;
361 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
362 according to OPTIONS and SIZE on STREAM. Formats s and i are not
363 supported at this level. */
366 print_scalar_formatted (const void *valaddr
, struct type
*type
,
367 const struct value_print_options
*options
,
368 int size
, struct ui_file
*stream
)
370 struct gdbarch
*gdbarch
= get_type_arch (type
);
371 LONGEST val_long
= 0;
372 unsigned int len
= TYPE_LENGTH (type
);
373 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
375 /* String printing should go through val_print_scalar_formatted. */
376 gdb_assert (options
->format
!= 's');
378 if (len
> sizeof(LONGEST
) &&
379 (TYPE_CODE (type
) == TYPE_CODE_INT
380 || TYPE_CODE (type
) == TYPE_CODE_ENUM
))
382 switch (options
->format
)
385 print_octal_chars (stream
, valaddr
, len
, byte_order
);
389 print_decimal_chars (stream
, valaddr
, len
, byte_order
);
392 print_binary_chars (stream
, valaddr
, len
, byte_order
);
395 print_hex_chars (stream
, valaddr
, len
, byte_order
);
398 print_char_chars (stream
, type
, valaddr
, len
, byte_order
);
405 if (options
->format
!= 'f')
406 val_long
= unpack_long (type
, valaddr
);
408 /* If the value is a pointer, and pointers and addresses are not the
409 same, then at this point, the value's length (in target bytes) is
410 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
411 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
412 len
= gdbarch_addr_bit (gdbarch
) / TARGET_CHAR_BIT
;
414 /* If we are printing it as unsigned, truncate it in case it is actually
415 a negative signed value (e.g. "print/u (short)-1" should print 65535
416 (if shorts are 16 bits) instead of 4294967295). */
417 if (options
->format
!= 'd' || TYPE_UNSIGNED (type
))
419 if (len
< sizeof (LONGEST
))
420 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
423 switch (options
->format
)
428 /* No size specified, like in print. Print varying # of digits. */
429 print_longest (stream
, 'x', 1, val_long
);
438 print_longest (stream
, size
, 1, val_long
);
441 error (_("Undefined output size \"%c\"."), size
);
446 print_longest (stream
, 'd', 1, val_long
);
450 print_longest (stream
, 'u', 0, val_long
);
455 print_longest (stream
, 'o', 1, val_long
);
457 fprintf_filtered (stream
, "0");
462 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
464 print_address (gdbarch
, addr
, stream
);
470 struct value_print_options opts
= *options
;
473 if (TYPE_UNSIGNED (type
))
474 type
= builtin_type (gdbarch
)->builtin_true_unsigned_char
;
476 type
= builtin_type (gdbarch
)->builtin_true_char
;
478 value_print (value_from_longest (type
, val_long
), stream
, &opts
);
483 type
= float_type_from_length (type
);
484 print_floating (valaddr
, type
, stream
);
488 internal_error (__FILE__
, __LINE__
,
489 _("failed internal consistency check"));
492 /* Binary; 't' stands for "two". */
494 char bits
[8 * (sizeof val_long
) + 1];
495 char buf
[8 * (sizeof val_long
) + 32];
500 width
= 8 * (sizeof val_long
);
517 error (_("Undefined output size \"%c\"."), size
);
523 bits
[width
] = (val_long
& 1) ? '1' : '0';
528 while (*cp
&& *cp
== '0')
533 strncpy (buf
, cp
, sizeof (bits
));
534 fputs_filtered (buf
, stream
);
539 error (_("Undefined output format \"%c\"."), options
->format
);
543 /* Specify default address for `x' command.
544 The `info lines' command uses this. */
547 set_next_address (struct gdbarch
*gdbarch
, CORE_ADDR addr
)
549 struct type
*ptr_type
= builtin_type (gdbarch
)->builtin_data_ptr
;
551 next_gdbarch
= gdbarch
;
554 /* Make address available to the user as $_. */
555 set_internalvar (lookup_internalvar ("_"),
556 value_from_pointer (ptr_type
, addr
));
559 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
560 after LEADIN. Print nothing if no symbolic name is found nearby.
561 Optionally also print source file and line number, if available.
562 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
563 or to interpret it as a possible C++ name and convert it back to source
564 form. However note that DO_DEMANGLE can be overridden by the specific
565 settings of the demangle and asm_demangle variables. Returns
566 non-zero if anything was printed; zero otherwise. */
569 print_address_symbolic (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
570 struct ui_file
*stream
,
571 int do_demangle
, char *leadin
)
574 char *filename
= NULL
;
579 /* Throw away both name and filename. */
580 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
581 make_cleanup (free_current_contents
, &filename
);
583 if (build_address_symbolic (gdbarch
, addr
, do_demangle
, &name
, &offset
,
584 &filename
, &line
, &unmapped
))
586 do_cleanups (cleanup_chain
);
590 fputs_filtered (leadin
, stream
);
592 fputs_filtered ("<*", stream
);
594 fputs_filtered ("<", stream
);
595 fputs_filtered (name
, stream
);
597 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
599 /* Append source filename and line number if desired. Give specific
600 line # of this addr, if we have it; else line # of the nearest symbol. */
601 if (print_symbol_filename
&& filename
!= NULL
)
604 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
606 fprintf_filtered (stream
, " in %s", filename
);
609 fputs_filtered ("*>", stream
);
611 fputs_filtered (">", stream
);
613 do_cleanups (cleanup_chain
);
617 /* Given an address ADDR return all the elements needed to print the
618 address in a symbolic form. NAME can be mangled or not depending
619 on DO_DEMANGLE (and also on the asm_demangle global variable,
620 manipulated via ''set print asm-demangle''). Return 0 in case of
621 success, when all the info in the OUT paramters is valid. Return 1
624 build_address_symbolic (struct gdbarch
*gdbarch
,
625 CORE_ADDR addr
, /* IN */
626 int do_demangle
, /* IN */
627 char **name
, /* OUT */
628 int *offset
, /* OUT */
629 char **filename
, /* OUT */
631 int *unmapped
) /* OUT */
633 struct minimal_symbol
*msymbol
;
634 struct symbol
*symbol
;
635 CORE_ADDR name_location
= 0;
636 struct obj_section
*section
= NULL
;
637 const char *name_temp
= "";
639 /* Let's say it is mapped (not unmapped). */
642 /* Determine if the address is in an overlay, and whether it is
644 if (overlay_debugging
)
646 section
= find_pc_overlay (addr
);
647 if (pc_in_unmapped_range (addr
, section
))
650 addr
= overlay_mapped_address (addr
, section
);
654 /* First try to find the address in the symbol table, then
655 in the minsyms. Take the closest one. */
657 /* This is defective in the sense that it only finds text symbols. So
658 really this is kind of pointless--we should make sure that the
659 minimal symbols have everything we need (by changing that we could
660 save some memory, but for many debug format--ELF/DWARF or
661 anything/stabs--it would be inconvenient to eliminate those minimal
663 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
664 symbol
= find_pc_sect_function (addr
, section
);
668 /* If this is a function (i.e. a code address), strip out any
669 non-address bits. For instance, display a pointer to the
670 first instruction of a Thumb function as <function>; the
671 second instruction will be <function+2>, even though the
672 pointer is <function+3>. This matches the ISA behavior. */
673 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
675 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
676 if (do_demangle
|| asm_demangle
)
677 name_temp
= SYMBOL_PRINT_NAME (symbol
);
679 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
683 && MSYMBOL_HAS_SIZE (msymbol
)
684 && MSYMBOL_SIZE (msymbol
) == 0
685 && MSYMBOL_TYPE (msymbol
) != mst_text
686 && MSYMBOL_TYPE (msymbol
) != mst_text_gnu_ifunc
687 && MSYMBOL_TYPE (msymbol
) != mst_file_text
)
692 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
694 /* The msymbol is closer to the address than the symbol;
695 use the msymbol instead. */
697 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
698 if (do_demangle
|| asm_demangle
)
699 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
701 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
704 if (symbol
== NULL
&& msymbol
== NULL
)
707 /* If the nearest symbol is too far away, don't print anything symbolic. */
709 /* For when CORE_ADDR is larger than unsigned int, we do math in
710 CORE_ADDR. But when we detect unsigned wraparound in the
711 CORE_ADDR math, we ignore this test and print the offset,
712 because addr+max_symbolic_offset has wrapped through the end
713 of the address space back to the beginning, giving bogus comparison. */
714 if (addr
> name_location
+ max_symbolic_offset
715 && name_location
+ max_symbolic_offset
> name_location
)
718 *offset
= addr
- name_location
;
720 *name
= xstrdup (name_temp
);
722 if (print_symbol_filename
)
724 struct symtab_and_line sal
;
726 sal
= find_pc_sect_line (addr
, section
, 0);
730 *filename
= xstrdup (sal
.symtab
->filename
);
738 /* Print address ADDR symbolically on STREAM.
739 First print it as a number. Then perhaps print
740 <SYMBOL + OFFSET> after the number. */
743 print_address (struct gdbarch
*gdbarch
,
744 CORE_ADDR addr
, struct ui_file
*stream
)
746 fputs_filtered (paddress (gdbarch
, addr
), stream
);
747 print_address_symbolic (gdbarch
, addr
, stream
, asm_demangle
, " ");
750 /* Return a prefix for instruction address:
751 "=> " for current instruction, else " ". */
754 pc_prefix (CORE_ADDR addr
)
756 if (has_stack_frames ())
758 struct frame_info
*frame
;
761 frame
= get_selected_frame (NULL
);
762 if (get_frame_pc_if_available (frame
, &pc
) && pc
== addr
)
768 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
769 controls whether to print the symbolic name "raw" or demangled.
770 Return non-zero if anything was printed; zero otherwise. */
773 print_address_demangle (const struct value_print_options
*opts
,
774 struct gdbarch
*gdbarch
, CORE_ADDR addr
,
775 struct ui_file
*stream
, int do_demangle
)
777 if (opts
->addressprint
)
779 fputs_filtered (paddress (gdbarch
, addr
), stream
);
780 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, " ");
784 return print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, "");
790 /* Examine data at address ADDR in format FMT.
791 Fetch it from memory and print on gdb_stdout. */
794 do_examine (struct format_data fmt
, struct gdbarch
*gdbarch
, CORE_ADDR addr
)
799 struct type
*val_type
= NULL
;
802 struct value_print_options opts
;
807 next_gdbarch
= gdbarch
;
810 /* Instruction format implies fetch single bytes
811 regardless of the specified size.
812 The case of strings is handled in decode_format, only explicit
813 size operator are not changed to 'b'. */
819 /* Pick the appropriate size for an address. */
820 if (gdbarch_ptr_bit (next_gdbarch
) == 64)
822 else if (gdbarch_ptr_bit (next_gdbarch
) == 32)
824 else if (gdbarch_ptr_bit (next_gdbarch
) == 16)
827 /* Bad value for gdbarch_ptr_bit. */
828 internal_error (__FILE__
, __LINE__
,
829 _("failed internal consistency check"));
833 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
834 else if (size
== 'h')
835 val_type
= builtin_type (next_gdbarch
)->builtin_int16
;
836 else if (size
== 'w')
837 val_type
= builtin_type (next_gdbarch
)->builtin_int32
;
838 else if (size
== 'g')
839 val_type
= builtin_type (next_gdbarch
)->builtin_int64
;
843 struct type
*char_type
= NULL
;
845 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char
846 if type is not found. */
848 char_type
= builtin_type (next_gdbarch
)->builtin_char16
;
849 else if (size
== 'w')
850 char_type
= builtin_type (next_gdbarch
)->builtin_char32
;
852 val_type
= char_type
;
855 if (size
!= '\0' && size
!= 'b')
856 warning (_("Unable to display strings with "
857 "size '%c', using 'b' instead."), size
);
859 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
868 if (format
== 's' || format
== 'i')
871 get_formatted_print_options (&opts
, format
);
873 /* Print as many objects as specified in COUNT, at most maxelts per line,
874 with the address of the next one at the start of each line. */
880 fputs_filtered (pc_prefix (next_address
), gdb_stdout
);
881 print_address (next_gdbarch
, next_address
, gdb_stdout
);
882 printf_filtered (":");
887 printf_filtered ("\t");
888 /* Note that print_formatted sets next_address for the next
890 last_examine_address
= next_address
;
892 if (last_examine_value
)
893 value_free (last_examine_value
);
895 /* The value to be displayed is not fetched greedily.
896 Instead, to avoid the possibility of a fetched value not
897 being used, its retrieval is delayed until the print code
898 uses it. When examining an instruction stream, the
899 disassembler will perform its own memory fetch using just
900 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
901 the disassembler be modified so that LAST_EXAMINE_VALUE
902 is left with the byte sequence from the last complete
903 instruction fetched from memory? */
904 last_examine_value
= value_at_lazy (val_type
, next_address
);
906 if (last_examine_value
)
907 release_value (last_examine_value
);
909 print_formatted (last_examine_value
, size
, &opts
, gdb_stdout
);
911 /* Display any branch delay slots following the final insn. */
912 if (format
== 'i' && count
== 1)
913 count
+= branch_delay_insns
;
915 printf_filtered ("\n");
916 gdb_flush (gdb_stdout
);
921 validate_format (struct format_data fmt
, char *cmdname
)
924 error (_("Size letters are meaningless in \"%s\" command."), cmdname
);
926 error (_("Item count other than 1 is meaningless in \"%s\" command."),
928 if (fmt
.format
== 'i')
929 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
930 fmt
.format
, cmdname
);
933 /* Evaluate string EXP as an expression in the current language and
934 print the resulting value. EXP may contain a format specifier as the
935 first argument ("/x myvar" for example, to print myvar in hex). */
938 print_command_1 (char *exp
, int inspect
, int voidprint
)
940 struct expression
*expr
;
941 struct cleanup
*old_chain
= 0;
944 struct format_data fmt
;
947 if (exp
&& *exp
== '/')
950 fmt
= decode_format (&exp
, last_format
, 0);
951 validate_format (fmt
, "print");
952 last_format
= format
= fmt
.format
;
964 expr
= parse_expression (exp
);
965 old_chain
= make_cleanup (free_current_contents
, &expr
);
967 val
= evaluate_expression (expr
);
970 val
= access_value_history (0);
972 if (voidprint
|| (val
&& value_type (val
) &&
973 TYPE_CODE (value_type (val
)) != TYPE_CODE_VOID
))
975 struct value_print_options opts
;
976 int histindex
= record_latest_value (val
);
979 annotate_value_history_begin (histindex
, value_type (val
));
981 annotate_value_begin (value_type (val
));
984 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
986 else if (histindex
>= 0)
987 printf_filtered ("$%d = ", histindex
);
990 annotate_value_history_value ();
992 get_formatted_print_options (&opts
, format
);
993 opts
.inspect_it
= inspect
;
996 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
997 printf_filtered ("\n");
1000 annotate_value_history_end ();
1002 annotate_value_end ();
1005 printf_unfiltered ("\") )\030");
1009 do_cleanups (old_chain
);
1013 print_command (char *exp
, int from_tty
)
1015 print_command_1 (exp
, 0, 1);
1018 /* Same as print, except in epoch, it gets its own window. */
1020 inspect_command (char *exp
, int from_tty
)
1022 extern int epoch_interface
;
1024 print_command_1 (exp
, epoch_interface
, 1);
1027 /* Same as print, except it doesn't print void results. */
1029 call_command (char *exp
, int from_tty
)
1031 print_command_1 (exp
, 0, 0);
1035 output_command (char *exp
, int from_tty
)
1037 struct expression
*expr
;
1038 struct cleanup
*old_chain
;
1041 struct format_data fmt
;
1042 struct value_print_options opts
;
1047 if (exp
&& *exp
== '/')
1050 fmt
= decode_format (&exp
, 0, 0);
1051 validate_format (fmt
, "output");
1052 format
= fmt
.format
;
1055 expr
= parse_expression (exp
);
1056 old_chain
= make_cleanup (free_current_contents
, &expr
);
1058 val
= evaluate_expression (expr
);
1060 annotate_value_begin (value_type (val
));
1062 get_formatted_print_options (&opts
, format
);
1064 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
1066 annotate_value_end ();
1069 gdb_flush (gdb_stdout
);
1071 do_cleanups (old_chain
);
1075 set_command (char *exp
, int from_tty
)
1077 struct expression
*expr
= parse_expression (exp
);
1078 struct cleanup
*old_chain
=
1079 make_cleanup (free_current_contents
, &expr
);
1081 if (expr
->nelts
>= 1)
1082 switch (expr
->elts
[0].opcode
)
1084 case UNOP_PREINCREMENT
:
1085 case UNOP_POSTINCREMENT
:
1086 case UNOP_PREDECREMENT
:
1087 case UNOP_POSTDECREMENT
:
1089 case BINOP_ASSIGN_MODIFY
:
1094 (_("Expression is not an assignment (and might have no effect)"));
1097 evaluate_expression (expr
);
1098 do_cleanups (old_chain
);
1102 sym_info (char *arg
, int from_tty
)
1104 struct minimal_symbol
*msymbol
;
1105 struct objfile
*objfile
;
1106 struct obj_section
*osect
;
1107 CORE_ADDR addr
, sect_addr
;
1109 unsigned int offset
;
1112 error_no_arg (_("address"));
1114 addr
= parse_and_eval_address (arg
);
1115 ALL_OBJSECTIONS (objfile
, osect
)
1117 /* Only process each object file once, even if there's a separate
1119 if (objfile
->separate_debug_objfile_backlink
)
1122 sect_addr
= overlay_mapped_address (addr
, osect
);
1124 if (obj_section_addr (osect
) <= sect_addr
1125 && sect_addr
< obj_section_endaddr (osect
)
1126 && (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, osect
)))
1128 const char *obj_name
, *mapped
, *sec_name
, *msym_name
;
1130 struct cleanup
*old_chain
;
1133 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1134 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1135 sec_name
= osect
->the_bfd_section
->name
;
1136 msym_name
= SYMBOL_PRINT_NAME (msymbol
);
1138 /* Don't print the offset if it is zero.
1139 We assume there's no need to handle i18n of "sym + offset". */
1141 loc_string
= xstrprintf ("%s + %u", msym_name
, offset
);
1143 loc_string
= xstrprintf ("%s", msym_name
);
1145 /* Use a cleanup to free loc_string in case the user quits
1146 a pagination request inside printf_filtered. */
1147 old_chain
= make_cleanup (xfree
, loc_string
);
1149 gdb_assert (osect
->objfile
&& osect
->objfile
->name
);
1150 obj_name
= osect
->objfile
->name
;
1152 if (MULTI_OBJFILE_P ())
1153 if (pc_in_unmapped_range (addr
, osect
))
1154 if (section_is_overlay (osect
))
1155 printf_filtered (_("%s in load address range of "
1156 "%s overlay section %s of %s\n"),
1157 loc_string
, mapped
, sec_name
, obj_name
);
1159 printf_filtered (_("%s in load address range of "
1160 "section %s of %s\n"),
1161 loc_string
, sec_name
, obj_name
);
1163 if (section_is_overlay (osect
))
1164 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1165 loc_string
, mapped
, sec_name
, obj_name
);
1167 printf_filtered (_("%s in section %s of %s\n"),
1168 loc_string
, sec_name
, obj_name
);
1170 if (pc_in_unmapped_range (addr
, osect
))
1171 if (section_is_overlay (osect
))
1172 printf_filtered (_("%s in load address range of %s overlay "
1174 loc_string
, mapped
, sec_name
);
1176 printf_filtered (_("%s in load address range of section %s\n"),
1177 loc_string
, sec_name
);
1179 if (section_is_overlay (osect
))
1180 printf_filtered (_("%s in %s overlay section %s\n"),
1181 loc_string
, mapped
, sec_name
);
1183 printf_filtered (_("%s in section %s\n"),
1184 loc_string
, sec_name
);
1186 do_cleanups (old_chain
);
1190 printf_filtered (_("No symbol matches %s.\n"), arg
);
1194 address_info (char *exp
, int from_tty
)
1196 struct gdbarch
*gdbarch
;
1199 struct minimal_symbol
*msymbol
;
1201 struct obj_section
*section
;
1202 CORE_ADDR load_addr
, context_pc
= 0;
1203 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1204 if exp is a field of `this'. */
1207 error (_("Argument required."));
1209 sym
= lookup_symbol (exp
, get_selected_block (&context_pc
), VAR_DOMAIN
,
1210 &is_a_field_of_this
);
1213 if (is_a_field_of_this
)
1215 printf_filtered ("Symbol \"");
1216 fprintf_symbol_filtered (gdb_stdout
, exp
,
1217 current_language
->la_language
, DMGL_ANSI
);
1218 printf_filtered ("\" is a field of the local class variable ");
1219 if (current_language
->la_language
== language_objc
)
1220 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1222 printf_filtered ("`this'\n");
1226 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1228 if (msymbol
!= NULL
)
1230 gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
1231 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1233 printf_filtered ("Symbol \"");
1234 fprintf_symbol_filtered (gdb_stdout
, exp
,
1235 current_language
->la_language
, DMGL_ANSI
);
1236 printf_filtered ("\" is at ");
1237 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1238 printf_filtered (" in a file compiled without debugging");
1239 section
= SYMBOL_OBJ_SECTION (msymbol
);
1240 if (section_is_overlay (section
))
1242 load_addr
= overlay_unmapped_address (load_addr
, section
);
1243 printf_filtered (",\n -- loaded at ");
1244 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1245 printf_filtered (" in overlay section %s",
1246 section
->the_bfd_section
->name
);
1248 printf_filtered (".\n");
1251 error (_("No symbol \"%s\" in current context."), exp
);
1255 printf_filtered ("Symbol \"");
1256 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1257 current_language
->la_language
, DMGL_ANSI
);
1258 printf_filtered ("\" is ");
1259 val
= SYMBOL_VALUE (sym
);
1260 section
= SYMBOL_OBJ_SECTION (sym
);
1261 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1263 switch (SYMBOL_CLASS (sym
))
1266 case LOC_CONST_BYTES
:
1267 printf_filtered ("constant");
1271 printf_filtered ("a label at address ");
1272 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1273 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1274 if (section_is_overlay (section
))
1276 load_addr
= overlay_unmapped_address (load_addr
, section
);
1277 printf_filtered (",\n -- loaded at ");
1278 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1279 printf_filtered (" in overlay section %s",
1280 section
->the_bfd_section
->name
);
1285 /* FIXME: cagney/2004-01-26: It should be possible to
1286 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1287 Unfortunately DWARF 2 stores the frame-base (instead of the
1288 function) location in a function's symbol. Oops! For the
1289 moment enable this when/where applicable. */
1290 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, context_pc
,
1295 /* GDBARCH is the architecture associated with the objfile the symbol
1296 is defined in; the target architecture may be different, and may
1297 provide additional registers. However, we do not know the target
1298 architecture at this point. We assume the objfile architecture
1299 will contain all the standard registers that occur in debug info
1301 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1303 if (SYMBOL_IS_ARGUMENT (sym
))
1304 printf_filtered (_("an argument in register %s"),
1305 gdbarch_register_name (gdbarch
, regno
));
1307 printf_filtered (_("a variable in register %s"),
1308 gdbarch_register_name (gdbarch
, regno
));
1312 printf_filtered (_("static storage at address "));
1313 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1314 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1315 if (section_is_overlay (section
))
1317 load_addr
= overlay_unmapped_address (load_addr
, section
);
1318 printf_filtered (_(",\n -- loaded at "));
1319 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1320 printf_filtered (_(" in overlay section %s"),
1321 section
->the_bfd_section
->name
);
1325 case LOC_REGPARM_ADDR
:
1326 /* Note comment at LOC_REGISTER. */
1327 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1328 printf_filtered (_("address of an argument in register %s"),
1329 gdbarch_register_name (gdbarch
, regno
));
1333 printf_filtered (_("an argument at offset %ld"), val
);
1337 printf_filtered (_("a local variable at frame offset %ld"), val
);
1341 printf_filtered (_("a reference argument at offset %ld"), val
);
1345 printf_filtered (_("a typedef"));
1349 printf_filtered (_("a function at address "));
1350 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1351 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1352 if (section_is_overlay (section
))
1354 load_addr
= overlay_unmapped_address (load_addr
, section
);
1355 printf_filtered (_(",\n -- loaded at "));
1356 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1357 printf_filtered (_(" in overlay section %s"),
1358 section
->the_bfd_section
->name
);
1362 case LOC_UNRESOLVED
:
1364 struct minimal_symbol
*msym
;
1366 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, NULL
);
1368 printf_filtered ("unresolved");
1371 section
= SYMBOL_OBJ_SECTION (msym
);
1372 load_addr
= SYMBOL_VALUE_ADDRESS (msym
);
1375 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1376 printf_filtered (_("a thread-local variable at offset %s "
1377 "in the thread-local storage for `%s'"),
1378 paddress (gdbarch
, load_addr
),
1379 section
->objfile
->name
);
1382 printf_filtered (_("static storage at address "));
1383 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1384 if (section_is_overlay (section
))
1386 load_addr
= overlay_unmapped_address (load_addr
, section
);
1387 printf_filtered (_(",\n -- loaded at "));
1388 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1389 printf_filtered (_(" in overlay section %s"),
1390 section
->the_bfd_section
->name
);
1397 case LOC_OPTIMIZED_OUT
:
1398 printf_filtered (_("optimized out"));
1402 printf_filtered (_("of unknown (botched) type"));
1405 printf_filtered (".\n");
1410 x_command (char *exp
, int from_tty
)
1412 struct expression
*expr
;
1413 struct format_data fmt
;
1414 struct cleanup
*old_chain
;
1417 fmt
.format
= last_format
? last_format
: 'x';
1418 fmt
.size
= last_size
;
1422 if (exp
&& *exp
== '/')
1425 fmt
= decode_format (&exp
, last_format
, last_size
);
1428 /* If we have an expression, evaluate it and use it as the address. */
1430 if (exp
!= 0 && *exp
!= 0)
1432 expr
= parse_expression (exp
);
1433 /* Cause expression not to be there any more if this command is
1434 repeated with Newline. But don't clobber a user-defined
1435 command's definition. */
1438 old_chain
= make_cleanup (free_current_contents
, &expr
);
1439 val
= evaluate_expression (expr
);
1440 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1441 val
= coerce_ref (val
);
1442 /* In rvalue contexts, such as this, functions are coerced into
1443 pointers to functions. This makes "x/i main" work. */
1444 if (/* last_format == 'i' && */
1445 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1446 && VALUE_LVAL (val
) == lval_memory
)
1447 next_address
= value_address (val
);
1449 next_address
= value_as_address (val
);
1451 next_gdbarch
= expr
->gdbarch
;
1452 do_cleanups (old_chain
);
1456 error_no_arg (_("starting display address"));
1458 do_examine (fmt
, next_gdbarch
, next_address
);
1460 /* If the examine succeeds, we remember its size and format for next
1461 time. Set last_size to 'b' for strings. */
1462 if (fmt
.format
== 's')
1465 last_size
= fmt
.size
;
1466 last_format
= fmt
.format
;
1468 /* Set a couple of internal variables if appropriate. */
1469 if (last_examine_value
)
1471 /* Make last address examined available to the user as $_. Use
1472 the correct pointer type. */
1473 struct type
*pointer_type
1474 = lookup_pointer_type (value_type (last_examine_value
));
1475 set_internalvar (lookup_internalvar ("_"),
1476 value_from_pointer (pointer_type
,
1477 last_examine_address
));
1479 /* Make contents of last address examined available to the user
1480 as $__. If the last value has not been fetched from memory
1481 then don't fetch it now; instead mark it by voiding the $__
1483 if (value_lazy (last_examine_value
))
1484 clear_internalvar (lookup_internalvar ("__"));
1486 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1491 /* Add an expression to the auto-display chain.
1492 Specify the expression. */
1495 display_command (char *exp
, int from_tty
)
1497 struct format_data fmt
;
1498 struct expression
*expr
;
1499 struct display
*new;
1503 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1505 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1506 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1520 fmt
= decode_format (&exp
, 0, 0);
1521 if (fmt
.size
&& fmt
.format
== 0)
1523 if (fmt
.format
== 'i' || fmt
.format
== 's')
1534 innermost_block
= NULL
;
1535 expr
= parse_expression (exp
);
1537 new = (struct display
*) xmalloc (sizeof (struct display
));
1539 new->exp_string
= xstrdup (exp
);
1541 new->block
= innermost_block
;
1542 new->pspace
= current_program_space
;
1543 new->next
= display_chain
;
1544 new->number
= ++display_number
;
1547 display_chain
= new;
1549 if (from_tty
&& target_has_execution
)
1550 do_one_display (new);
1557 free_display (struct display
*d
)
1559 xfree (d
->exp_string
);
1564 /* Clear out the display_chain. Done when new symtabs are loaded,
1565 since this invalidates the types stored in many expressions. */
1568 clear_displays (void)
1572 while ((d
= display_chain
) != NULL
)
1574 display_chain
= d
->next
;
1579 /* Delete the auto-display DISPLAY. */
1582 delete_display (struct display
*display
)
1586 gdb_assert (display
!= NULL
);
1588 if (display_chain
== display
)
1589 display_chain
= display
->next
;
1592 if (d
->next
== display
)
1594 d
->next
= display
->next
;
1598 free_display (display
);
1601 /* Call FUNCTION on each of the displays whose numbers are given in
1602 ARGS. DATA is passed unmodified to FUNCTION. */
1605 map_display_numbers (char *args
,
1606 void (*function
) (struct display
*,
1610 struct get_number_or_range_state state
;
1614 error_no_arg (_("one or more display numbers"));
1616 init_number_or_range (&state
, args
);
1618 while (!state
.finished
)
1620 char *p
= state
.string
;
1622 num
= get_number_or_range (&state
);
1624 warning (_("bad display number at or near '%s'"), p
);
1627 struct display
*d
, *tmp
;
1629 ALL_DISPLAYS_SAFE (d
, tmp
)
1630 if (d
->number
== num
)
1633 printf_unfiltered (_("No display number %d.\n"), num
);
1640 /* Callback for map_display_numbers, that deletes a display. */
1643 do_delete_display (struct display
*d
, void *data
)
1648 /* "undisplay" command. */
1651 undisplay_command (char *args
, int from_tty
)
1655 if (query (_("Delete all auto-display expressions? ")))
1661 map_display_numbers (args
, do_delete_display
, NULL
);
1665 /* Display a single auto-display.
1666 Do nothing if the display cannot be printed in the current context,
1667 or if the display is disabled. */
1670 do_one_display (struct display
*d
)
1672 struct cleanup
*old_chain
;
1673 int within_current_scope
;
1675 if (d
->enabled_p
== 0)
1678 /* The expression carries the architecture that was used at parse time.
1679 This is a problem if the expression depends on architecture features
1680 (e.g. register numbers), and the current architecture is now different.
1681 For example, a display statement like "display/i $pc" is expected to
1682 display the PC register of the current architecture, not the arch at
1683 the time the display command was given. Therefore, we re-parse the
1684 expression if the current architecture has changed. */
1685 if (d
->exp
!= NULL
&& d
->exp
->gdbarch
!= get_current_arch ())
1694 volatile struct gdb_exception ex
;
1696 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1698 innermost_block
= NULL
;
1699 d
->exp
= parse_expression (d
->exp_string
);
1700 d
->block
= innermost_block
;
1704 /* Can't re-parse the expression. Disable this display item. */
1706 warning (_("Unable to display \"%s\": %s"),
1707 d
->exp_string
, ex
.message
);
1714 if (d
->pspace
== current_program_space
)
1715 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1717 within_current_scope
= 0;
1720 within_current_scope
= 1;
1721 if (!within_current_scope
)
1724 old_chain
= make_cleanup_restore_integer (¤t_display_number
);
1725 current_display_number
= d
->number
;
1727 annotate_display_begin ();
1728 printf_filtered ("%d", d
->number
);
1729 annotate_display_number_end ();
1730 printf_filtered (": ");
1733 volatile struct gdb_exception ex
;
1735 annotate_display_format ();
1737 printf_filtered ("x/");
1738 if (d
->format
.count
!= 1)
1739 printf_filtered ("%d", d
->format
.count
);
1740 printf_filtered ("%c", d
->format
.format
);
1741 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1742 printf_filtered ("%c", d
->format
.size
);
1743 printf_filtered (" ");
1745 annotate_display_expression ();
1747 puts_filtered (d
->exp_string
);
1748 annotate_display_expression_end ();
1750 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1751 printf_filtered ("\n");
1753 printf_filtered (" ");
1755 annotate_display_value ();
1757 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1762 val
= evaluate_expression (d
->exp
);
1763 addr
= value_as_address (val
);
1764 if (d
->format
.format
== 'i')
1765 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1766 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1769 fprintf_filtered (gdb_stdout
, _("<error: %s>\n"), ex
.message
);
1773 struct value_print_options opts
;
1774 volatile struct gdb_exception ex
;
1776 annotate_display_format ();
1778 if (d
->format
.format
)
1779 printf_filtered ("/%c ", d
->format
.format
);
1781 annotate_display_expression ();
1783 puts_filtered (d
->exp_string
);
1784 annotate_display_expression_end ();
1786 printf_filtered (" = ");
1788 annotate_display_expression ();
1790 get_formatted_print_options (&opts
, d
->format
.format
);
1791 opts
.raw
= d
->format
.raw
;
1793 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
1797 val
= evaluate_expression (d
->exp
);
1798 print_formatted (val
, d
->format
.size
, &opts
, gdb_stdout
);
1801 fprintf_filtered (gdb_stdout
, _("<error: %s>"), ex
.message
);
1802 printf_filtered ("\n");
1805 annotate_display_end ();
1807 gdb_flush (gdb_stdout
);
1808 do_cleanups (old_chain
);
1811 /* Display all of the values on the auto-display chain which can be
1812 evaluated in the current scope. */
1819 for (d
= display_chain
; d
; d
= d
->next
)
1823 /* Delete the auto-display which we were in the process of displaying.
1824 This is done when there is an error or a signal. */
1827 disable_display (int num
)
1831 for (d
= display_chain
; d
; d
= d
->next
)
1832 if (d
->number
== num
)
1837 printf_unfiltered (_("No display number %d.\n"), num
);
1841 disable_current_display (void)
1843 if (current_display_number
>= 0)
1845 disable_display (current_display_number
);
1846 fprintf_unfiltered (gdb_stderr
,
1847 _("Disabling display %d to "
1848 "avoid infinite recursion.\n"),
1849 current_display_number
);
1851 current_display_number
= -1;
1855 display_info (char *ignore
, int from_tty
)
1860 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1862 printf_filtered (_("Auto-display expressions now in effect:\n\
1863 Num Enb Expression\n"));
1865 for (d
= display_chain
; d
; d
= d
->next
)
1867 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1869 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1871 else if (d
->format
.format
)
1872 printf_filtered ("/%c ", d
->format
.format
);
1873 puts_filtered (d
->exp_string
);
1874 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1875 printf_filtered (_(" (cannot be evaluated in the current context)"));
1876 printf_filtered ("\n");
1877 gdb_flush (gdb_stdout
);
1881 /* Callback fo map_display_numbers, that enables or disables the
1882 passed in display D. */
1885 do_enable_disable_display (struct display
*d
, void *data
)
1887 d
->enabled_p
= *(int *) data
;
1890 /* Implamentation of both the "disable display" and "enable display"
1891 commands. ENABLE decides what to do. */
1894 enable_disable_display_command (char *args
, int from_tty
, int enable
)
1901 d
->enabled_p
= enable
;
1905 map_display_numbers (args
, do_enable_disable_display
, &enable
);
1908 /* The "enable display" command. */
1911 enable_display_command (char *args
, int from_tty
)
1913 enable_disable_display_command (args
, from_tty
, 1);
1916 /* The "disable display" command. */
1919 disable_display_command (char *args
, int from_tty
)
1921 enable_disable_display_command (args
, from_tty
, 0);
1924 /* display_chain items point to blocks and expressions. Some expressions in
1925 turn may point to symbols.
1926 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1927 obstack_free'd when a shared library is unloaded.
1928 Clear pointers that are about to become dangling.
1929 Both .exp and .block fields will be restored next time we need to display
1930 an item by re-parsing .exp_string field in the new execution context. */
1933 clear_dangling_display_expressions (struct so_list
*solib
)
1935 struct objfile
*objfile
= solib
->objfile
;
1938 /* With no symbol file we cannot have a block or expression from it. */
1939 if (objfile
== NULL
)
1941 if (objfile
->separate_debug_objfile_backlink
)
1942 objfile
= objfile
->separate_debug_objfile_backlink
;
1943 gdb_assert (objfile
->pspace
== solib
->pspace
);
1945 for (d
= display_chain
; d
!= NULL
; d
= d
->next
)
1947 if (d
->pspace
!= solib
->pspace
)
1950 if (lookup_objfile_from_block (d
->block
) == objfile
1951 || (d
->exp
&& exp_uses_objfile (d
->exp
, objfile
)))
1961 /* Print the value in stack frame FRAME of a variable specified by a
1962 struct symbol. NAME is the name to print; if NULL then VAR's print
1963 name will be used. STREAM is the ui_file on which to print the
1964 value. INDENT specifies the number of indent levels to print
1965 before printing the variable name.
1967 This function invalidates FRAME. */
1970 print_variable_and_value (const char *name
, struct symbol
*var
,
1971 struct frame_info
*frame
,
1972 struct ui_file
*stream
, int indent
)
1974 volatile struct gdb_exception except
;
1977 name
= SYMBOL_PRINT_NAME (var
);
1979 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1980 TRY_CATCH (except
, RETURN_MASK_ERROR
)
1983 struct value_print_options opts
;
1985 val
= read_var_value (var
, frame
);
1986 get_user_print_options (&opts
);
1988 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1990 /* common_val_print invalidates FRAME when a pretty printer calls inferior
1994 if (except
.reason
< 0)
1995 fprintf_filtered(stream
, "<error reading variable %s (%s)>", name
,
1997 fprintf_filtered (stream
, "\n");
2000 /* printf "printf format string" ARG to STREAM. */
2003 ui_printf (char *arg
, struct ui_file
*stream
)
2005 struct format_piece
*fpieces
;
2007 struct value
**val_args
;
2008 int allocated_args
= 20;
2009 struct cleanup
*old_cleanups
;
2011 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
2012 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2015 error_no_arg (_("format-control string and values to print"));
2017 s
= skip_spaces (s
);
2019 /* A format string should follow, enveloped in double quotes. */
2021 error (_("Bad format string, missing '\"'."));
2023 fpieces
= parse_format_string (&s
);
2025 make_cleanup (free_format_pieces_cleanup
, &fpieces
);
2028 error (_("Bad format string, non-terminated '\"'."));
2030 s
= skip_spaces (s
);
2032 if (*s
!= ',' && *s
!= 0)
2033 error (_("Invalid argument syntax"));
2037 s
= skip_spaces (s
);
2043 char *current_substring
;
2046 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2047 if (fpieces
[fr
].argclass
!= literal_piece
)
2050 /* Now, parse all arguments and evaluate them.
2051 Store the VALUEs in VAL_ARGS. */
2057 if (nargs
== allocated_args
)
2058 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2059 (allocated_args
*= 2)
2060 * sizeof (struct value
*));
2062 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2070 if (nargs
!= nargs_wanted
)
2071 error (_("Wrong number of arguments for specified format-string"));
2073 /* Now actually print them. */
2075 for (fr
= 0; fpieces
[fr
].string
!= NULL
; fr
++)
2077 current_substring
= fpieces
[fr
].string
;
2078 switch (fpieces
[fr
].argclass
)
2086 tem
= value_as_address (val_args
[i
]);
2088 /* This is a %s argument. Find the length of the string. */
2094 read_memory (tem
+ j
, &c
, 1);
2099 /* Copy the string contents into a string inside GDB. */
2100 str
= (gdb_byte
*) alloca (j
+ 1);
2102 read_memory (tem
, str
, j
);
2105 fprintf_filtered (stream
, current_substring
, (char *) str
);
2108 case wide_string_arg
:
2113 struct gdbarch
*gdbarch
2114 = get_type_arch (value_type (val_args
[i
]));
2115 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2116 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2117 "wchar_t", NULL
, 0);
2118 int wcwidth
= TYPE_LENGTH (wctype
);
2119 gdb_byte
*buf
= alloca (wcwidth
);
2120 struct obstack output
;
2121 struct cleanup
*inner_cleanup
;
2123 tem
= value_as_address (val_args
[i
]);
2125 /* This is a %s argument. Find the length of the string. */
2126 for (j
= 0;; j
+= wcwidth
)
2129 read_memory (tem
+ j
, buf
, wcwidth
);
2130 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2134 /* Copy the string contents into a string inside GDB. */
2135 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2137 read_memory (tem
, str
, j
);
2138 memset (&str
[j
], 0, wcwidth
);
2140 obstack_init (&output
);
2141 inner_cleanup
= make_cleanup_obstack_free (&output
);
2143 convert_between_encodings (target_wide_charset (gdbarch
),
2146 &output
, translit_char
);
2147 obstack_grow_str0 (&output
, "");
2149 fprintf_filtered (stream
, current_substring
,
2150 obstack_base (&output
));
2151 do_cleanups (inner_cleanup
);
2156 struct gdbarch
*gdbarch
2157 = get_type_arch (value_type (val_args
[i
]));
2158 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2159 "wchar_t", NULL
, 0);
2160 struct type
*valtype
;
2161 struct obstack output
;
2162 struct cleanup
*inner_cleanup
;
2163 const gdb_byte
*bytes
;
2165 valtype
= value_type (val_args
[i
]);
2166 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2167 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2168 error (_("expected wchar_t argument for %%lc"));
2170 bytes
= value_contents (val_args
[i
]);
2172 obstack_init (&output
);
2173 inner_cleanup
= make_cleanup_obstack_free (&output
);
2175 convert_between_encodings (target_wide_charset (gdbarch
),
2177 bytes
, TYPE_LENGTH (valtype
),
2178 TYPE_LENGTH (valtype
),
2179 &output
, translit_char
);
2180 obstack_grow_str0 (&output
, "");
2182 fprintf_filtered (stream
, current_substring
,
2183 obstack_base (&output
));
2184 do_cleanups (inner_cleanup
);
2189 struct type
*type
= value_type (val_args
[i
]);
2193 /* If format string wants a float, unchecked-convert the value
2194 to floating point of the same size. */
2195 type
= float_type_from_length (type
);
2196 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2198 error (_("Invalid floating value found in program."));
2200 fprintf_filtered (stream
, current_substring
, (double) val
);
2203 case long_double_arg
:
2204 #ifdef HAVE_LONG_DOUBLE
2206 struct type
*type
= value_type (val_args
[i
]);
2210 /* If format string wants a float, unchecked-convert the value
2211 to floating point of the same size. */
2212 type
= float_type_from_length (type
);
2213 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2215 error (_("Invalid floating value found in program."));
2217 fprintf_filtered (stream
, current_substring
,
2222 error (_("long double not supported in printf"));
2225 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2227 long long val
= value_as_long (val_args
[i
]);
2229 fprintf_filtered (stream
, current_substring
, val
);
2233 error (_("long long not supported in printf"));
2237 int val
= value_as_long (val_args
[i
]);
2239 fprintf_filtered (stream
, current_substring
, val
);
2244 long val
= value_as_long (val_args
[i
]);
2246 fprintf_filtered (stream
, current_substring
, val
);
2250 /* Handles decimal floating values. */
2253 const gdb_byte
*param_ptr
= value_contents (val_args
[i
]);
2255 #if defined (PRINTF_HAS_DECFLOAT)
2256 /* If we have native support for Decimal floating
2257 printing, handle it here. */
2258 fprintf_filtered (stream
, current_substring
, param_ptr
);
2261 /* As a workaround until vasprintf has native support for DFP
2262 we convert the DFP values to string and print them using
2263 the %s format specifier. */
2266 int nnull_chars
= 0;
2268 /* Parameter data. */
2269 struct type
*param_type
= value_type (val_args
[i
]);
2270 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2271 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2273 /* DFP output data. */
2274 struct value
*dfp_value
= NULL
;
2278 struct type
*dfp_type
= NULL
;
2279 char decstr
[MAX_DECIMAL_STRING
];
2281 /* Points to the end of the string so that we can go back
2282 and check for DFP length modifiers. */
2283 eos
= current_substring
+ strlen (current_substring
);
2285 /* Look for the float/double format specifier. */
2286 while (*eos
!= 'f' && *eos
!= 'e' && *eos
!= 'E'
2287 && *eos
!= 'g' && *eos
!= 'G')
2292 /* Search for the '%' char and extract the size and type of
2293 the output decimal value based on its modifiers
2294 (%Hf, %Df, %DDf). */
2295 while (*--sos
!= '%')
2300 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2302 else if (*sos
== 'D' && *(sos
- 1) == 'D')
2305 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2311 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2315 /* Replace %Hf, %Df and %DDf with %s's. */
2318 /* Go through the whole format string and pull the correct
2319 number of chars back to compensate for the change in the
2320 format specifier. */
2321 while (nnull_chars
< nargs
- i
)
2329 /* Conversion between different DFP types. */
2330 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2331 decimal_convert (param_ptr
, TYPE_LENGTH (param_type
),
2332 byte_order
, dec
, dfp_len
, byte_order
);
2334 /* If this is a non-trivial conversion, just output 0.
2335 A correct converted value can be displayed by explicitly
2336 casting to a DFP type. */
2337 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2339 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2341 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2343 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2345 /* Print the DFP value. */
2346 fprintf_filtered (stream
, current_substring
, decstr
);
2354 /* We avoid the host's %p because pointers are too
2355 likely to be the wrong size. The only interesting
2356 modifier for %p is a width; extract that, and then
2357 handle %p as glibc would: %#x or a literal "(nil)". */
2359 char *p
, *fmt
, *fmt_p
;
2360 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2361 long long val
= value_as_long (val_args
[i
]);
2363 long val
= value_as_long (val_args
[i
]);
2366 fmt
= alloca (strlen (current_substring
) + 5);
2368 /* Copy up to the leading %. */
2369 p
= current_substring
;
2373 int is_percent
= (*p
== '%');
2388 /* Copy any width. */
2389 while (*p
>= '0' && *p
< '9')
2392 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2395 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2401 fprintf_filtered (stream
, fmt
, val
);
2407 fprintf_filtered (stream
, fmt
, "(nil)");
2413 /* Print a portion of the format string that has no
2414 directives. Note that this will not include any
2415 ordinary %-specs, but it might include "%%". That is
2416 why we use printf_filtered and not puts_filtered here.
2417 Also, we pass a dummy argument because some platforms
2418 have modified GCC to include -Wformat-security by
2419 default, which will warn here if there is no
2421 fprintf_filtered (stream
, current_substring
, 0);
2424 internal_error (__FILE__
, __LINE__
,
2425 _("failed internal consistency check"));
2427 /* Maybe advance to the next argument. */
2428 if (fpieces
[fr
].argclass
!= literal_piece
)
2432 do_cleanups (old_cleanups
);
2435 /* Implement the "printf" command. */
2438 printf_command (char *arg
, int from_tty
)
2440 ui_printf (arg
, gdb_stdout
);
2443 /* Implement the "eval" command. */
2446 eval_command (char *arg
, int from_tty
)
2448 struct ui_file
*ui_out
= mem_fileopen ();
2449 struct cleanup
*cleanups
= make_cleanup_ui_file_delete (ui_out
);
2452 ui_printf (arg
, ui_out
);
2454 expanded
= ui_file_xstrdup (ui_out
, NULL
);
2455 make_cleanup (xfree
, expanded
);
2457 execute_command (expanded
, from_tty
);
2459 do_cleanups (cleanups
);
2463 _initialize_printcmd (void)
2465 struct cmd_list_element
*c
;
2467 current_display_number
= -1;
2469 observer_attach_solib_unloaded (clear_dangling_display_expressions
);
2471 add_info ("address", address_info
,
2472 _("Describe where symbol SYM is stored."));
2474 add_info ("symbol", sym_info
, _("\
2475 Describe what symbol is at location ADDR.\n\
2476 Only for symbols with fixed locations (global or static scope)."));
2478 add_com ("x", class_vars
, x_command
, _("\
2479 Examine memory: x/FMT ADDRESS.\n\
2480 ADDRESS is an expression for the memory address to examine.\n\
2481 FMT is a repeat count followed by a format letter and a size letter.\n\
2482 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2483 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2484 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2485 The specified number of objects of the specified size are printed\n\
2486 according to the format.\n\n\
2487 Defaults for format and size letters are those previously used.\n\
2488 Default count is 1. Default address is following last thing printed\n\
2489 with this command or \"print\"."));
2492 add_com ("whereis", class_vars
, whereis_command
,
2493 _("Print line number and file of definition of variable."));
2496 add_info ("display", display_info
, _("\
2497 Expressions to display when program stops, with code numbers."));
2499 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2500 Cancel some expressions to be displayed when program stops.\n\
2501 Arguments are the code numbers of the expressions to stop displaying.\n\
2502 No argument means cancel all automatic-display expressions.\n\
2503 \"delete display\" has the same effect as this command.\n\
2504 Do \"info display\" to see current list of code numbers."),
2507 add_com ("display", class_vars
, display_command
, _("\
2508 Print value of expression EXP each time the program stops.\n\
2509 /FMT may be used before EXP as in the \"print\" command.\n\
2510 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2511 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2512 and examining is done as in the \"x\" command.\n\n\
2513 With no argument, display all currently requested auto-display expressions.\n\
2514 Use \"undisplay\" to cancel display requests previously made."));
2516 add_cmd ("display", class_vars
, enable_display_command
, _("\
2517 Enable some expressions to be displayed when program stops.\n\
2518 Arguments are the code numbers of the expressions to resume displaying.\n\
2519 No argument means enable all automatic-display expressions.\n\
2520 Do \"info display\" to see current list of code numbers."), &enablelist
);
2522 add_cmd ("display", class_vars
, disable_display_command
, _("\
2523 Disable some expressions to be displayed when program stops.\n\
2524 Arguments are the code numbers of the expressions to stop displaying.\n\
2525 No argument means disable all automatic-display expressions.\n\
2526 Do \"info display\" to see current list of code numbers."), &disablelist
);
2528 add_cmd ("display", class_vars
, undisplay_command
, _("\
2529 Cancel 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 cancel all automatic-display expressions.\n\
2532 Do \"info display\" to see current list of code numbers."), &deletelist
);
2534 add_com ("printf", class_vars
, printf_command
, _("\
2535 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2536 This is useful for formatted output in user-defined commands."));
2538 add_com ("output", class_vars
, output_command
, _("\
2539 Like \"print\" but don't put in value history and don't print newline.\n\
2540 This is useful in user-defined commands."));
2542 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2543 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2544 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2545 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2546 with $), a register (a few standard names starting with $), or an actual\n\
2547 variable in the program being debugged. EXP is any valid expression.\n\
2548 Use \"set variable\" for variables with names identical to set subcommands.\n\
2550 With a subcommand, this command modifies parts of the gdb environment.\n\
2551 You can see these environment settings with the \"show\" command."),
2552 &setlist
, "set ", 1, &cmdlist
);
2554 add_com ("assign", class_vars
, set_command
, _("\
2555 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2556 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2557 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2558 with $), a register (a few standard names starting with $), or an actual\n\
2559 variable in the program being debugged. EXP is any valid expression.\n\
2560 Use \"set variable\" for variables with names identical to set subcommands.\n\
2561 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2562 You can see these environment settings with the \"show\" command."));
2564 /* "call" is the same as "set", but handy for dbx users to call fns. */
2565 c
= add_com ("call", class_vars
, call_command
, _("\
2566 Call a function in the program.\n\
2567 The argument is the function name and arguments, in the notation of the\n\
2568 current working language. The result is printed and saved in the value\n\
2569 history, if it is not void."));
2570 set_cmd_completer (c
, expression_completer
);
2572 add_cmd ("variable", class_vars
, set_command
, _("\
2573 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2574 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2575 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2576 with $), a register (a few standard names starting with $), or an actual\n\
2577 variable in the program being debugged. EXP is any valid expression.\n\
2578 This may usually be abbreviated to simply \"set\"."),
2581 c
= add_com ("print", class_vars
, print_command
, _("\
2582 Print value of expression EXP.\n\
2583 Variables accessible are those of the lexical environment of the selected\n\
2584 stack frame, plus all those whose scope is global or an entire file.\n\
2586 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2587 $$NUM refers to NUM'th value back from the last one.\n\
2588 Names starting with $ refer to registers (with the values they would have\n\
2589 if the program were to return to the stack frame now selected, restoring\n\
2590 all registers saved by frames farther in) or else to debugger\n\
2591 \"convenience\" variables (any such name not a known register).\n\
2592 Use assignment expressions to give values to convenience variables.\n\
2594 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2595 @ is a binary operator for treating consecutive data objects\n\
2596 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2597 element is FOO, whose second element is stored in the space following\n\
2598 where FOO is stored, etc. FOO must be an expression whose value\n\
2599 resides in memory.\n\
2601 EXP may be preceded with /FMT, where FMT is a format letter\n\
2602 but no count or size letter (see \"x\" command)."));
2603 set_cmd_completer (c
, expression_completer
);
2604 add_com_alias ("p", "print", class_vars
, 1);
2606 c
= add_com ("inspect", class_vars
, inspect_command
, _("\
2607 Same as \"print\" command, except that if you are running in the epoch\n\
2608 environment, the value is printed in its own window."));
2609 set_cmd_completer (c
, expression_completer
);
2611 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2612 &max_symbolic_offset
, _("\
2613 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2614 Show the largest offset that will be printed in <symbol+1234> form."), NULL
,
2616 show_max_symbolic_offset
,
2617 &setprintlist
, &showprintlist
);
2618 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2619 &print_symbol_filename
, _("\
2620 Set printing of source filename and line number with <symbol>."), _("\
2621 Show printing of source filename and line number with <symbol>."), NULL
,
2623 show_print_symbol_filename
,
2624 &setprintlist
, &showprintlist
);
2626 add_com ("eval", no_class
, eval_command
, _("\
2627 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\
2628 a command line, and call it."));