1 /* Print values for GNU debugger GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009, 2010 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 #include "gdb_string.h"
29 #include "expression.h"
33 #include "breakpoint.h"
37 #include "symfile.h" /* for overlay functions */
38 #include "objfiles.h" /* ditto */
39 #include "completer.h" /* for completion functions */
41 #include "gdb_assert.h"
46 #include "exceptions.h"
50 #include "parser-defs.h"
52 #include "arch-utils.h"
55 #include "tui/tui.h" /* For tui_active et.al. */
58 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG)
59 # define USE_PRINTF_I64 1
60 # define PRINTF_HAS_LONG_LONG
62 # define USE_PRINTF_I64 0
65 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
73 /* True if the value should be printed raw -- that is, bypassing
74 python-based formatters. */
78 /* Last specified output format. */
80 static char last_format
= 0;
82 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
84 static char last_size
= 'w';
86 /* Default address to examine next, and associated architecture. */
88 static struct gdbarch
*next_gdbarch
;
89 static CORE_ADDR next_address
;
91 /* Number of delay instructions following current disassembled insn. */
93 static int branch_delay_insns
;
95 /* Last address examined. */
97 static CORE_ADDR last_examine_address
;
99 /* Contents of last address examined.
100 This is not valid past the end of the `x' command! */
102 static struct value
*last_examine_value
;
104 /* Largest offset between a symbolic value and an address, that will be
105 printed as `0x1234 <symbol+offset>'. */
107 static unsigned int max_symbolic_offset
= UINT_MAX
;
109 show_max_symbolic_offset (struct ui_file
*file
, int from_tty
,
110 struct cmd_list_element
*c
, const char *value
)
112 fprintf_filtered (file
, _("\
113 The largest offset that will be printed in <symbol+1234> form is %s.\n"),
117 /* Append the source filename and linenumber of the symbol when
118 printing a symbolic value as `<symbol at filename:linenum>' if set. */
119 static int print_symbol_filename
= 0;
121 show_print_symbol_filename (struct ui_file
*file
, int from_tty
,
122 struct cmd_list_element
*c
, const char *value
)
124 fprintf_filtered (file
, _("\
125 Printing of source filename and line number with <symbol> is %s.\n"),
129 /* Number of auto-display expression currently being displayed.
130 So that we can disable it if we get an error or a signal within it.
131 -1 when not doing one. */
133 int current_display_number
;
137 /* Chain link to next auto-display item. */
138 struct display
*next
;
140 /* The expression as the user typed it. */
143 /* Expression to be evaluated and displayed. */
144 struct expression
*exp
;
146 /* Item number of this auto-display item. */
149 /* Display format specified. */
150 struct format_data format
;
152 /* Program space associated with `block'. */
153 struct program_space
*pspace
;
155 /* Innermost block required by this expression when evaluated */
158 /* Status of this display (enabled or disabled) */
162 /* Chain of expressions whose values should be displayed
163 automatically each time the program stops. */
165 static struct display
*display_chain
;
167 static int display_number
;
169 /* Prototypes for exported functions. */
171 void output_command (char *, int);
173 void _initialize_printcmd (void);
175 /* Prototypes for local functions. */
177 static void do_one_display (struct display
*);
180 /* Decode a format specification. *STRING_PTR should point to it.
181 OFORMAT and OSIZE are used as defaults for the format and size
182 if none are given in the format specification.
183 If OSIZE is zero, then the size field of the returned value
184 should be set only if a size is explicitly specified by the
186 The structure returned describes all the data
187 found in the specification. In addition, *STRING_PTR is advanced
188 past the specification and past all whitespace following it. */
190 static struct format_data
191 decode_format (char **string_ptr
, int oformat
, int osize
)
193 struct format_data val
;
194 char *p
= *string_ptr
;
201 if (*p
>= '0' && *p
<= '9')
202 val
.count
= atoi (p
);
203 while (*p
>= '0' && *p
<= '9')
206 /* Now process size or format letters that follow. */
210 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
217 else if (*p
>= 'a' && *p
<= 'z')
223 while (*p
== ' ' || *p
== '\t')
227 /* Set defaults for format and size if not specified. */
228 if (val
.format
== '?')
232 /* Neither has been specified. */
233 val
.format
= oformat
;
237 /* If a size is specified, any format makes a reasonable
238 default except 'i'. */
239 val
.format
= oformat
== 'i' ? 'x' : oformat
;
241 else if (val
.size
== '?')
245 /* Pick the appropriate size for an address. This is deferred
246 until do_examine when we know the actual architecture to use.
247 A special size value of 'a' is used to indicate this case. */
248 val
.size
= osize
? 'a' : osize
;
251 /* Floating point has to be word or giantword. */
252 if (osize
== 'w' || osize
== 'g')
255 /* Default it to giantword if the last used size is not
257 val
.size
= osize
? 'g' : osize
;
260 /* Characters default to one byte. */
261 val
.size
= osize
? 'b' : osize
;
264 /* The default is the size most recently specified. */
271 /* Print value VAL on stream according to OPTIONS.
272 Do not end with a newline.
273 SIZE is the letter for the size of datum being printed.
274 This is used to pad hex numbers so they line up. SIZE is 0
275 for print / output and set for examine. */
278 print_formatted (struct value
*val
, int size
,
279 const struct value_print_options
*options
,
280 struct ui_file
*stream
)
282 struct type
*type
= check_typedef (value_type (val
));
283 int len
= TYPE_LENGTH (type
);
285 if (VALUE_LVAL (val
) == lval_memory
)
286 next_address
= value_address (val
) + len
;
290 switch (options
->format
)
294 struct type
*elttype
= value_type (val
);
295 next_address
= (value_address (val
)
296 + val_print_string (elttype
,
297 value_address (val
), -1,
303 /* We often wrap here if there are long symbolic names. */
305 next_address
= (value_address (val
)
306 + gdb_print_insn (get_type_arch (type
),
307 value_address (val
), stream
,
308 &branch_delay_insns
));
313 if (options
->format
== 0 || options
->format
== 's'
314 || TYPE_CODE (type
) == TYPE_CODE_REF
315 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
316 || TYPE_CODE (type
) == TYPE_CODE_STRING
317 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
318 || TYPE_CODE (type
) == TYPE_CODE_UNION
319 || TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
320 value_print (val
, stream
, options
);
322 /* User specified format, so don't look to the the type to
323 tell us what to do. */
324 print_scalar_formatted (value_contents (val
), type
,
325 options
, size
, stream
);
328 /* Return builtin floating point type of same length as TYPE.
329 If no such type is found, return TYPE itself. */
331 float_type_from_length (struct type
*type
)
333 struct gdbarch
*gdbarch
= get_type_arch (type
);
334 const struct builtin_type
*builtin
= builtin_type (gdbarch
);
335 unsigned int len
= TYPE_LENGTH (type
);
337 if (len
== TYPE_LENGTH (builtin
->builtin_float
))
338 type
= builtin
->builtin_float
;
339 else if (len
== TYPE_LENGTH (builtin
->builtin_double
))
340 type
= builtin
->builtin_double
;
341 else if (len
== TYPE_LENGTH (builtin
->builtin_long_double
))
342 type
= builtin
->builtin_long_double
;
347 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
348 according to OPTIONS and SIZE on STREAM.
349 Formats s and i are not supported at this level.
351 This is how the elements of an array or structure are printed
355 print_scalar_formatted (const void *valaddr
, struct type
*type
,
356 const struct value_print_options
*options
,
357 int size
, struct ui_file
*stream
)
359 struct gdbarch
*gdbarch
= get_type_arch (type
);
360 LONGEST val_long
= 0;
361 unsigned int len
= TYPE_LENGTH (type
);
362 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
364 /* If we get here with a string format, try again without it. Go
365 all the way back to the language printers, which may call us
367 if (options
->format
== 's')
369 struct value_print_options opts
= *options
;
372 val_print (type
, valaddr
, 0, 0, stream
, 0, &opts
,
377 if (len
> sizeof(LONGEST
) &&
378 (TYPE_CODE (type
) == TYPE_CODE_INT
379 || TYPE_CODE (type
) == TYPE_CODE_ENUM
))
381 switch (options
->format
)
384 print_octal_chars (stream
, valaddr
, len
, byte_order
);
388 print_decimal_chars (stream
, valaddr
, len
, byte_order
);
391 print_binary_chars (stream
, valaddr
, len
, byte_order
);
394 print_hex_chars (stream
, valaddr
, len
, byte_order
);
397 print_char_chars (stream
, type
, valaddr
, len
, byte_order
);
404 if (options
->format
!= 'f')
405 val_long
= unpack_long (type
, valaddr
);
407 /* If the value is a pointer, and pointers and addresses are not the
408 same, then at this point, the value's length (in target bytes) is
409 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
410 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
411 len
= gdbarch_addr_bit (gdbarch
) / TARGET_CHAR_BIT
;
413 /* If we are printing it as unsigned, truncate it in case it is actually
414 a negative signed value (e.g. "print/u (short)-1" should print 65535
415 (if shorts are 16 bits) instead of 4294967295). */
416 if (options
->format
!= 'd' || TYPE_UNSIGNED (type
))
418 if (len
< sizeof (LONGEST
))
419 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
422 switch (options
->format
)
427 /* No size specified, like in print. Print varying # of digits. */
428 print_longest (stream
, 'x', 1, val_long
);
437 print_longest (stream
, size
, 1, val_long
);
440 error (_("Undefined output size \"%c\"."), size
);
445 print_longest (stream
, 'd', 1, val_long
);
449 print_longest (stream
, 'u', 0, val_long
);
454 print_longest (stream
, 'o', 1, val_long
);
456 fprintf_filtered (stream
, "0");
461 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')
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. */
566 print_address_symbolic (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
567 struct ui_file
*stream
,
568 int do_demangle
, char *leadin
)
571 char *filename
= NULL
;
576 /* Throw away both name and filename. */
577 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
578 make_cleanup (free_current_contents
, &filename
);
580 if (build_address_symbolic (gdbarch
, addr
, do_demangle
, &name
, &offset
,
581 &filename
, &line
, &unmapped
))
583 do_cleanups (cleanup_chain
);
587 fputs_filtered (leadin
, stream
);
589 fputs_filtered ("<*", stream
);
591 fputs_filtered ("<", stream
);
592 fputs_filtered (name
, stream
);
594 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
596 /* Append source filename and line number if desired. Give specific
597 line # of this addr, if we have it; else line # of the nearest symbol. */
598 if (print_symbol_filename
&& filename
!= NULL
)
601 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
603 fprintf_filtered (stream
, " in %s", filename
);
606 fputs_filtered ("*>", stream
);
608 fputs_filtered (">", stream
);
610 do_cleanups (cleanup_chain
);
613 /* Given an address ADDR return all the elements needed to print the
614 address in a symbolic form. NAME can be mangled or not depending
615 on DO_DEMANGLE (and also on the asm_demangle global variable,
616 manipulated via ''set print asm-demangle''). Return 0 in case of
617 success, when all the info in the OUT paramters is valid. Return 1
620 build_address_symbolic (struct gdbarch
*gdbarch
,
621 CORE_ADDR addr
, /* IN */
622 int do_demangle
, /* IN */
623 char **name
, /* OUT */
624 int *offset
, /* OUT */
625 char **filename
, /* OUT */
627 int *unmapped
) /* OUT */
629 struct minimal_symbol
*msymbol
;
630 struct symbol
*symbol
;
631 CORE_ADDR name_location
= 0;
632 struct obj_section
*section
= NULL
;
633 char *name_temp
= "";
635 /* Let's say it is mapped (not unmapped). */
638 /* Determine if the address is in an overlay, and whether it is
640 if (overlay_debugging
)
642 section
= find_pc_overlay (addr
);
643 if (pc_in_unmapped_range (addr
, section
))
646 addr
= overlay_mapped_address (addr
, section
);
650 /* First try to find the address in the symbol table, then
651 in the minsyms. Take the closest one. */
653 /* This is defective in the sense that it only finds text symbols. So
654 really this is kind of pointless--we should make sure that the
655 minimal symbols have everything we need (by changing that we could
656 save some memory, but for many debug format--ELF/DWARF or
657 anything/stabs--it would be inconvenient to eliminate those minimal
659 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
660 symbol
= find_pc_sect_function (addr
, section
);
664 /* If this is a function (i.e. a code address), strip out any
665 non-address bits. For instance, display a pointer to the
666 first instruction of a Thumb function as <function>; the
667 second instruction will be <function+2>, even though the
668 pointer is <function+3>. This matches the ISA behavior. */
669 addr
= gdbarch_addr_bits_remove (gdbarch
, addr
);
671 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
672 if (do_demangle
|| asm_demangle
)
673 name_temp
= SYMBOL_PRINT_NAME (symbol
);
675 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
680 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
682 /* The msymbol is closer to the address than the symbol;
683 use the msymbol instead. */
685 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
686 if (do_demangle
|| asm_demangle
)
687 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
689 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
692 if (symbol
== NULL
&& msymbol
== NULL
)
695 /* If the nearest symbol is too far away, don't print anything symbolic. */
697 /* For when CORE_ADDR is larger than unsigned int, we do math in
698 CORE_ADDR. But when we detect unsigned wraparound in the
699 CORE_ADDR math, we ignore this test and print the offset,
700 because addr+max_symbolic_offset has wrapped through the end
701 of the address space back to the beginning, giving bogus comparison. */
702 if (addr
> name_location
+ max_symbolic_offset
703 && name_location
+ max_symbolic_offset
> name_location
)
706 *offset
= addr
- name_location
;
708 *name
= xstrdup (name_temp
);
710 if (print_symbol_filename
)
712 struct symtab_and_line sal
;
714 sal
= find_pc_sect_line (addr
, section
, 0);
718 *filename
= xstrdup (sal
.symtab
->filename
);
726 /* Print address ADDR symbolically on STREAM.
727 First print it as a number. Then perhaps print
728 <SYMBOL + OFFSET> after the number. */
731 print_address (struct gdbarch
*gdbarch
,
732 CORE_ADDR addr
, struct ui_file
*stream
)
734 fputs_filtered (paddress (gdbarch
, addr
), stream
);
735 print_address_symbolic (gdbarch
, addr
, stream
, asm_demangle
, " ");
738 /* Return a prefix for instruction address:
739 "=> " for current instruction, else " ". */
742 pc_prefix (CORE_ADDR addr
)
744 if (has_stack_frames ())
746 struct frame_info
*frame
;
749 frame
= get_selected_frame (NULL
);
750 pc
= get_frame_pc (frame
);
758 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
759 controls whether to print the symbolic name "raw" or demangled.
760 Global setting "addressprint" controls whether to print hex address
764 print_address_demangle (struct gdbarch
*gdbarch
, CORE_ADDR addr
,
765 struct ui_file
*stream
, int do_demangle
)
767 struct value_print_options opts
;
768 get_user_print_options (&opts
);
771 fprintf_filtered (stream
, "0");
773 else if (opts
.addressprint
)
775 fputs_filtered (paddress (gdbarch
, addr
), stream
);
776 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, " ");
780 print_address_symbolic (gdbarch
, addr
, stream
, do_demangle
, "");
785 /* Examine data at address ADDR in format FMT.
786 Fetch it from memory and print on gdb_stdout. */
789 do_examine (struct format_data fmt
, struct gdbarch
*gdbarch
, CORE_ADDR addr
)
794 struct type
*val_type
= NULL
;
797 struct value_print_options opts
;
802 next_gdbarch
= gdbarch
;
805 /* String or instruction format implies fetch single bytes
806 regardless of the specified size. */
807 if (format
== 's' || format
== 'i')
812 /* Pick the appropriate size for an address. */
813 if (gdbarch_ptr_bit (next_gdbarch
) == 64)
815 else if (gdbarch_ptr_bit (next_gdbarch
) == 32)
817 else if (gdbarch_ptr_bit (next_gdbarch
) == 16)
820 /* Bad value for gdbarch_ptr_bit. */
821 internal_error (__FILE__
, __LINE__
,
822 _("failed internal consistency check"));
826 val_type
= builtin_type (next_gdbarch
)->builtin_int8
;
827 else if (size
== 'h')
828 val_type
= builtin_type (next_gdbarch
)->builtin_int16
;
829 else if (size
== 'w')
830 val_type
= builtin_type (next_gdbarch
)->builtin_int32
;
831 else if (size
== 'g')
832 val_type
= builtin_type (next_gdbarch
)->builtin_int64
;
839 if (format
== 's' || format
== 'i')
842 get_formatted_print_options (&opts
, format
);
844 /* Print as many objects as specified in COUNT, at most maxelts per line,
845 with the address of the next one at the start of each line. */
851 fputs_filtered (pc_prefix (next_address
), gdb_stdout
);
852 print_address (next_gdbarch
, next_address
, gdb_stdout
);
853 printf_filtered (":");
858 printf_filtered ("\t");
859 /* Note that print_formatted sets next_address for the next
861 last_examine_address
= next_address
;
863 if (last_examine_value
)
864 value_free (last_examine_value
);
866 /* The value to be displayed is not fetched greedily.
867 Instead, to avoid the possibility of a fetched value not
868 being used, its retrieval is delayed until the print code
869 uses it. When examining an instruction stream, the
870 disassembler will perform its own memory fetch using just
871 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
872 the disassembler be modified so that LAST_EXAMINE_VALUE
873 is left with the byte sequence from the last complete
874 instruction fetched from memory? */
875 last_examine_value
= value_at_lazy (val_type
, next_address
);
877 if (last_examine_value
)
878 release_value (last_examine_value
);
880 print_formatted (last_examine_value
, size
, &opts
, gdb_stdout
);
882 /* Display any branch delay slots following the final insn. */
883 if (format
== 'i' && count
== 1)
884 count
+= branch_delay_insns
;
886 printf_filtered ("\n");
887 gdb_flush (gdb_stdout
);
892 validate_format (struct format_data fmt
, char *cmdname
)
895 error (_("Size letters are meaningless in \"%s\" command."), cmdname
);
897 error (_("Item count other than 1 is meaningless in \"%s\" command."),
899 if (fmt
.format
== 'i')
900 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
901 fmt
.format
, cmdname
);
904 /* Evaluate string EXP as an expression in the current language and
905 print the resulting value. EXP may contain a format specifier as the
906 first argument ("/x myvar" for example, to print myvar in hex). */
909 print_command_1 (char *exp
, int inspect
, int voidprint
)
911 struct expression
*expr
;
912 struct cleanup
*old_chain
= 0;
915 struct format_data fmt
;
918 if (exp
&& *exp
== '/')
921 fmt
= decode_format (&exp
, last_format
, 0);
922 validate_format (fmt
, "print");
923 last_format
= format
= fmt
.format
;
936 expr
= parse_expression (exp
);
937 old_chain
= make_cleanup (free_current_contents
, &expr
);
939 val
= evaluate_expression (expr
);
942 val
= access_value_history (0);
944 if (voidprint
|| (val
&& value_type (val
) &&
945 TYPE_CODE (value_type (val
)) != TYPE_CODE_VOID
))
947 struct value_print_options opts
;
948 int histindex
= record_latest_value (val
);
951 annotate_value_history_begin (histindex
, value_type (val
));
953 annotate_value_begin (value_type (val
));
956 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
958 else if (histindex
>= 0)
959 printf_filtered ("$%d = ", histindex
);
962 annotate_value_history_value ();
964 get_formatted_print_options (&opts
, format
);
965 opts
.inspect_it
= inspect
;
968 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
969 printf_filtered ("\n");
972 annotate_value_history_end ();
974 annotate_value_end ();
977 printf_unfiltered ("\") )\030");
981 do_cleanups (old_chain
);
985 print_command (char *exp
, int from_tty
)
987 print_command_1 (exp
, 0, 1);
990 /* Same as print, except in epoch, it gets its own window. */
992 inspect_command (char *exp
, int from_tty
)
994 extern int epoch_interface
;
996 print_command_1 (exp
, epoch_interface
, 1);
999 /* Same as print, except it doesn't print void results. */
1001 call_command (char *exp
, int from_tty
)
1003 print_command_1 (exp
, 0, 0);
1007 output_command (char *exp
, int from_tty
)
1009 struct expression
*expr
;
1010 struct cleanup
*old_chain
;
1013 struct format_data fmt
;
1014 struct value_print_options opts
;
1019 if (exp
&& *exp
== '/')
1022 fmt
= decode_format (&exp
, 0, 0);
1023 validate_format (fmt
, "output");
1024 format
= fmt
.format
;
1027 expr
= parse_expression (exp
);
1028 old_chain
= make_cleanup (free_current_contents
, &expr
);
1030 val
= evaluate_expression (expr
);
1032 annotate_value_begin (value_type (val
));
1034 get_formatted_print_options (&opts
, format
);
1036 print_formatted (val
, fmt
.size
, &opts
, gdb_stdout
);
1038 annotate_value_end ();
1041 gdb_flush (gdb_stdout
);
1043 do_cleanups (old_chain
);
1047 set_command (char *exp
, int from_tty
)
1049 struct expression
*expr
= parse_expression (exp
);
1050 struct cleanup
*old_chain
=
1051 make_cleanup (free_current_contents
, &expr
);
1052 evaluate_expression (expr
);
1053 do_cleanups (old_chain
);
1057 sym_info (char *arg
, int from_tty
)
1059 struct minimal_symbol
*msymbol
;
1060 struct objfile
*objfile
;
1061 struct obj_section
*osect
;
1062 CORE_ADDR addr
, sect_addr
;
1064 unsigned int offset
;
1067 error_no_arg (_("address"));
1069 addr
= parse_and_eval_address (arg
);
1070 ALL_OBJSECTIONS (objfile
, osect
)
1072 /* Only process each object file once, even if there's a separate
1074 if (objfile
->separate_debug_objfile_backlink
)
1077 sect_addr
= overlay_mapped_address (addr
, osect
);
1079 if (obj_section_addr (osect
) <= sect_addr
1080 && sect_addr
< obj_section_endaddr (osect
)
1081 && (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, osect
)))
1083 const char *obj_name
, *mapped
, *sec_name
, *msym_name
;
1085 struct cleanup
*old_chain
;
1088 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1089 mapped
= section_is_mapped (osect
) ? _("mapped") : _("unmapped");
1090 sec_name
= osect
->the_bfd_section
->name
;
1091 msym_name
= SYMBOL_PRINT_NAME (msymbol
);
1093 /* Don't print the offset if it is zero.
1094 We assume there's no need to handle i18n of "sym + offset". */
1096 loc_string
= xstrprintf ("%s + %u", msym_name
, offset
);
1098 loc_string
= xstrprintf ("%s", msym_name
);
1100 /* Use a cleanup to free loc_string in case the user quits
1101 a pagination request inside printf_filtered. */
1102 old_chain
= make_cleanup (xfree
, loc_string
);
1104 gdb_assert (osect
->objfile
&& osect
->objfile
->name
);
1105 obj_name
= osect
->objfile
->name
;
1107 if (MULTI_OBJFILE_P ())
1108 if (pc_in_unmapped_range (addr
, osect
))
1109 if (section_is_overlay (osect
))
1110 printf_filtered (_("%s in load address range of "
1111 "%s overlay section %s of %s\n"),
1112 loc_string
, mapped
, sec_name
, obj_name
);
1114 printf_filtered (_("%s in load address range of "
1115 "section %s of %s\n"),
1116 loc_string
, sec_name
, obj_name
);
1118 if (section_is_overlay (osect
))
1119 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1120 loc_string
, mapped
, sec_name
, obj_name
);
1122 printf_filtered (_("%s in section %s of %s\n"),
1123 loc_string
, sec_name
, obj_name
);
1125 if (pc_in_unmapped_range (addr
, osect
))
1126 if (section_is_overlay (osect
))
1127 printf_filtered (_("%s in load address range of %s overlay "
1129 loc_string
, mapped
, sec_name
);
1131 printf_filtered (_("%s in load address range of section %s\n"),
1132 loc_string
, sec_name
);
1134 if (section_is_overlay (osect
))
1135 printf_filtered (_("%s in %s overlay section %s\n"),
1136 loc_string
, mapped
, sec_name
);
1138 printf_filtered (_("%s in section %s\n"),
1139 loc_string
, sec_name
);
1141 do_cleanups (old_chain
);
1145 printf_filtered (_("No symbol matches %s.\n"), arg
);
1149 address_info (char *exp
, int from_tty
)
1151 struct gdbarch
*gdbarch
;
1154 struct minimal_symbol
*msymbol
;
1156 struct obj_section
*section
;
1157 CORE_ADDR load_addr
;
1158 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1159 if exp is a field of `this'. */
1162 error (_("Argument required."));
1164 sym
= lookup_symbol (exp
, get_selected_block (0), VAR_DOMAIN
,
1165 &is_a_field_of_this
);
1168 if (is_a_field_of_this
)
1170 printf_filtered ("Symbol \"");
1171 fprintf_symbol_filtered (gdb_stdout
, exp
,
1172 current_language
->la_language
, DMGL_ANSI
);
1173 printf_filtered ("\" is a field of the local class variable ");
1174 if (current_language
->la_language
== language_objc
)
1175 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1177 printf_filtered ("`this'\n");
1181 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1183 if (msymbol
!= NULL
)
1185 gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
1186 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1188 printf_filtered ("Symbol \"");
1189 fprintf_symbol_filtered (gdb_stdout
, exp
,
1190 current_language
->la_language
, DMGL_ANSI
);
1191 printf_filtered ("\" is at ");
1192 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1193 printf_filtered (" in a file compiled without debugging");
1194 section
= SYMBOL_OBJ_SECTION (msymbol
);
1195 if (section_is_overlay (section
))
1197 load_addr
= overlay_unmapped_address (load_addr
, section
);
1198 printf_filtered (",\n -- loaded at ");
1199 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1200 printf_filtered (" in overlay section %s",
1201 section
->the_bfd_section
->name
);
1203 printf_filtered (".\n");
1206 error (_("No symbol \"%s\" in current context."), exp
);
1210 printf_filtered ("Symbol \"");
1211 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_PRINT_NAME (sym
),
1212 current_language
->la_language
, DMGL_ANSI
);
1213 printf_filtered ("\" is ");
1214 val
= SYMBOL_VALUE (sym
);
1215 section
= SYMBOL_OBJ_SECTION (sym
);
1216 gdbarch
= get_objfile_arch (SYMBOL_SYMTAB (sym
)->objfile
);
1218 switch (SYMBOL_CLASS (sym
))
1221 case LOC_CONST_BYTES
:
1222 printf_filtered ("constant");
1226 printf_filtered ("a label at address ");
1227 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1228 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1229 if (section_is_overlay (section
))
1231 load_addr
= overlay_unmapped_address (load_addr
, section
);
1232 printf_filtered (",\n -- loaded at ");
1233 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1234 printf_filtered (" in overlay section %s",
1235 section
->the_bfd_section
->name
);
1240 /* FIXME: cagney/2004-01-26: It should be possible to
1241 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1242 Unfortunately DWARF 2 stores the frame-base (instead of the
1243 function) location in a function's symbol. Oops! For the
1244 moment enable this when/where applicable. */
1245 SYMBOL_COMPUTED_OPS (sym
)->describe_location (sym
, gdb_stdout
);
1249 /* GDBARCH is the architecture associated with the objfile the symbol
1250 is defined in; the target architecture may be different, and may
1251 provide additional registers. However, we do not know the target
1252 architecture at this point. We assume the objfile architecture
1253 will contain all the standard registers that occur in debug info
1255 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1257 if (SYMBOL_IS_ARGUMENT (sym
))
1258 printf_filtered (_("an argument in register %s"),
1259 gdbarch_register_name (gdbarch
, regno
));
1261 printf_filtered (_("a variable in register %s"),
1262 gdbarch_register_name (gdbarch
, regno
));
1266 printf_filtered (_("static storage at address "));
1267 load_addr
= SYMBOL_VALUE_ADDRESS (sym
);
1268 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1269 if (section_is_overlay (section
))
1271 load_addr
= overlay_unmapped_address (load_addr
, section
);
1272 printf_filtered (_(",\n -- loaded at "));
1273 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1274 printf_filtered (_(" in overlay section %s"),
1275 section
->the_bfd_section
->name
);
1279 case LOC_REGPARM_ADDR
:
1280 /* Note comment at LOC_REGISTER. */
1281 regno
= SYMBOL_REGISTER_OPS (sym
)->register_number (sym
, gdbarch
);
1282 printf_filtered (_("address of an argument in register %s"),
1283 gdbarch_register_name (gdbarch
, regno
));
1287 printf_filtered (_("an argument at offset %ld"), val
);
1291 printf_filtered (_("a local variable at frame offset %ld"), val
);
1295 printf_filtered (_("a reference argument at offset %ld"), val
);
1299 printf_filtered (_("a typedef"));
1303 printf_filtered (_("a function at address "));
1304 load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1305 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1306 if (section_is_overlay (section
))
1308 load_addr
= overlay_unmapped_address (load_addr
, section
);
1309 printf_filtered (_(",\n -- loaded at "));
1310 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1311 printf_filtered (_(" in overlay section %s"),
1312 section
->the_bfd_section
->name
);
1316 case LOC_UNRESOLVED
:
1318 struct minimal_symbol
*msym
;
1320 msym
= lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym
), NULL
, NULL
);
1322 printf_filtered ("unresolved");
1325 section
= SYMBOL_OBJ_SECTION (msym
);
1326 load_addr
= SYMBOL_VALUE_ADDRESS (msym
);
1329 && (section
->the_bfd_section
->flags
& SEC_THREAD_LOCAL
) != 0)
1330 printf_filtered (_("a thread-local variable at offset %s "
1331 "in the thread-local storage for `%s'"),
1332 paddress (gdbarch
, load_addr
),
1333 section
->objfile
->name
);
1336 printf_filtered (_("static storage at address "));
1337 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1338 if (section_is_overlay (section
))
1340 load_addr
= overlay_unmapped_address (load_addr
, section
);
1341 printf_filtered (_(",\n -- loaded at "));
1342 fputs_filtered (paddress (gdbarch
, load_addr
), gdb_stdout
);
1343 printf_filtered (_(" in overlay section %s"),
1344 section
->the_bfd_section
->name
);
1351 case LOC_OPTIMIZED_OUT
:
1352 printf_filtered (_("optimized out"));
1356 printf_filtered (_("of unknown (botched) type"));
1359 printf_filtered (".\n");
1364 x_command (char *exp
, int from_tty
)
1366 struct expression
*expr
;
1367 struct format_data fmt
;
1368 struct cleanup
*old_chain
;
1371 fmt
.format
= last_format
? last_format
: 'x';
1372 fmt
.size
= last_size
;
1376 if (exp
&& *exp
== '/')
1379 fmt
= decode_format (&exp
, last_format
, last_size
);
1382 /* If we have an expression, evaluate it and use it as the address. */
1384 if (exp
!= 0 && *exp
!= 0)
1386 expr
= parse_expression (exp
);
1387 /* Cause expression not to be there any more if this command is
1388 repeated with Newline. But don't clobber a user-defined
1389 command's definition. */
1392 old_chain
= make_cleanup (free_current_contents
, &expr
);
1393 val
= evaluate_expression (expr
);
1394 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_REF
)
1395 val
= value_ind (val
);
1396 /* In rvalue contexts, such as this, functions are coerced into
1397 pointers to functions. This makes "x/i main" work. */
1398 if (/* last_format == 'i' && */
1399 TYPE_CODE (value_type (val
)) == TYPE_CODE_FUNC
1400 && VALUE_LVAL (val
) == lval_memory
)
1401 next_address
= value_address (val
);
1403 next_address
= value_as_address (val
);
1405 next_gdbarch
= expr
->gdbarch
;
1406 do_cleanups (old_chain
);
1410 error_no_arg (_("starting display address"));
1412 do_examine (fmt
, next_gdbarch
, next_address
);
1414 /* If the examine succeeds, we remember its size and format for next
1416 last_size
= fmt
.size
;
1417 last_format
= fmt
.format
;
1419 /* Set a couple of internal variables if appropriate. */
1420 if (last_examine_value
)
1422 /* Make last address examined available to the user as $_. Use
1423 the correct pointer type. */
1424 struct type
*pointer_type
1425 = lookup_pointer_type (value_type (last_examine_value
));
1426 set_internalvar (lookup_internalvar ("_"),
1427 value_from_pointer (pointer_type
,
1428 last_examine_address
));
1430 /* Make contents of last address examined available to the user
1431 as $__. If the last value has not been fetched from memory
1432 then don't fetch it now; instead mark it by voiding the $__
1434 if (value_lazy (last_examine_value
))
1435 clear_internalvar (lookup_internalvar ("__"));
1437 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1442 /* Add an expression to the auto-display chain.
1443 Specify the expression. */
1446 display_command (char *exp
, int from_tty
)
1448 struct format_data fmt
;
1449 struct expression
*expr
;
1450 struct display
*new;
1454 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1456 if (tui_active
&& exp
!= NULL
&& *exp
== '$')
1457 display_it
= (tui_set_layout_for_display_command (exp
) == TUI_FAILURE
);
1471 fmt
= decode_format (&exp
, 0, 0);
1472 if (fmt
.size
&& fmt
.format
== 0)
1474 if (fmt
.format
== 'i' || fmt
.format
== 's')
1485 innermost_block
= NULL
;
1486 expr
= parse_expression (exp
);
1488 new = (struct display
*) xmalloc (sizeof (struct display
));
1490 new->exp_string
= xstrdup (exp
);
1492 new->block
= innermost_block
;
1493 new->pspace
= current_program_space
;
1494 new->next
= display_chain
;
1495 new->number
= ++display_number
;
1498 display_chain
= new;
1500 if (from_tty
&& target_has_execution
)
1501 do_one_display (new);
1508 free_display (struct display
*d
)
1510 xfree (d
->exp_string
);
1515 /* Clear out the display_chain. Done when new symtabs are loaded,
1516 since this invalidates the types stored in many expressions. */
1519 clear_displays (void)
1523 while ((d
= display_chain
) != NULL
)
1525 display_chain
= d
->next
;
1530 /* Delete the auto-display number NUM. */
1533 delete_display (int num
)
1535 struct display
*d1
, *d
;
1538 error (_("No display number %d."), num
);
1540 if (display_chain
->number
== num
)
1543 display_chain
= d1
->next
;
1547 for (d
= display_chain
;; d
= d
->next
)
1550 error (_("No display number %d."), num
);
1551 if (d
->next
->number
== num
)
1561 /* Delete some values from the auto-display chain.
1562 Specify the element numbers. */
1565 undisplay_command (char *args
, int from_tty
)
1573 if (query (_("Delete all auto-display expressions? ")))
1582 while (*p1
>= '0' && *p1
<= '9')
1584 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1585 error (_("Arguments must be display numbers."));
1589 delete_display (num
);
1592 while (*p
== ' ' || *p
== '\t')
1598 /* Display a single auto-display.
1599 Do nothing if the display cannot be printed in the current context,
1600 or if the display is disabled. */
1603 do_one_display (struct display
*d
)
1605 int within_current_scope
;
1607 if (d
->enabled_p
== 0)
1610 /* The expression carries the architecture that was used at parse time.
1611 This is a problem if the expression depends on architecture features
1612 (e.g. register numbers), and the current architecture is now different.
1613 For example, a display statement like "display/i $pc" is expected to
1614 display the PC register of the current architecture, not the arch at
1615 the time the display command was given. Therefore, we re-parse the
1616 expression if the current architecture has changed. */
1617 if (d
->exp
!= NULL
&& d
->exp
->gdbarch
!= get_current_arch ())
1626 volatile struct gdb_exception ex
;
1627 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1629 innermost_block
= NULL
;
1630 d
->exp
= parse_expression (d
->exp_string
);
1631 d
->block
= innermost_block
;
1635 /* Can't re-parse the expression. Disable this display item. */
1637 warning (_("Unable to display \"%s\": %s"),
1638 d
->exp_string
, ex
.message
);
1645 if (d
->pspace
== current_program_space
)
1646 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1648 within_current_scope
= 0;
1651 within_current_scope
= 1;
1652 if (!within_current_scope
)
1655 current_display_number
= d
->number
;
1657 annotate_display_begin ();
1658 printf_filtered ("%d", d
->number
);
1659 annotate_display_number_end ();
1660 printf_filtered (": ");
1666 annotate_display_format ();
1668 printf_filtered ("x/");
1669 if (d
->format
.count
!= 1)
1670 printf_filtered ("%d", d
->format
.count
);
1671 printf_filtered ("%c", d
->format
.format
);
1672 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1673 printf_filtered ("%c", d
->format
.size
);
1674 printf_filtered (" ");
1676 annotate_display_expression ();
1678 puts_filtered (d
->exp_string
);
1679 annotate_display_expression_end ();
1681 if (d
->format
.count
!= 1 || d
->format
.format
== 'i')
1682 printf_filtered ("\n");
1684 printf_filtered (" ");
1686 val
= evaluate_expression (d
->exp
);
1687 addr
= value_as_address (val
);
1688 if (d
->format
.format
== 'i')
1689 addr
= gdbarch_addr_bits_remove (d
->exp
->gdbarch
, addr
);
1691 annotate_display_value ();
1693 do_examine (d
->format
, d
->exp
->gdbarch
, addr
);
1697 struct value_print_options opts
;
1699 annotate_display_format ();
1701 if (d
->format
.format
)
1702 printf_filtered ("/%c ", d
->format
.format
);
1704 annotate_display_expression ();
1706 puts_filtered (d
->exp_string
);
1707 annotate_display_expression_end ();
1709 printf_filtered (" = ");
1711 annotate_display_expression ();
1713 get_formatted_print_options (&opts
, d
->format
.format
);
1714 opts
.raw
= d
->format
.raw
;
1715 print_formatted (evaluate_expression (d
->exp
),
1716 d
->format
.size
, &opts
, gdb_stdout
);
1717 printf_filtered ("\n");
1720 annotate_display_end ();
1722 gdb_flush (gdb_stdout
);
1723 current_display_number
= -1;
1726 /* Display all of the values on the auto-display chain which can be
1727 evaluated in the current scope. */
1734 for (d
= display_chain
; d
; d
= d
->next
)
1738 /* Delete the auto-display which we were in the process of displaying.
1739 This is done when there is an error or a signal. */
1742 disable_display (int num
)
1746 for (d
= display_chain
; d
; d
= d
->next
)
1747 if (d
->number
== num
)
1752 printf_unfiltered (_("No display number %d.\n"), num
);
1756 disable_current_display (void)
1758 if (current_display_number
>= 0)
1760 disable_display (current_display_number
);
1761 fprintf_unfiltered (gdb_stderr
, _("\
1762 Disabling display %d to avoid infinite recursion.\n"),
1763 current_display_number
);
1765 current_display_number
= -1;
1769 display_info (char *ignore
, int from_tty
)
1774 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1776 printf_filtered (_("Auto-display expressions now in effect:\n\
1777 Num Enb Expression\n"));
1779 for (d
= display_chain
; d
; d
= d
->next
)
1781 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1783 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1785 else if (d
->format
.format
)
1786 printf_filtered ("/%c ", d
->format
.format
);
1787 puts_filtered (d
->exp_string
);
1788 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1789 printf_filtered (_(" (cannot be evaluated in the current context)"));
1790 printf_filtered ("\n");
1791 gdb_flush (gdb_stdout
);
1796 enable_display (char *args
, int from_tty
)
1805 for (d
= display_chain
; d
; d
= d
->next
)
1812 while (*p1
>= '0' && *p1
<= '9')
1814 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1815 error (_("Arguments must be display numbers."));
1819 for (d
= display_chain
; d
; d
= d
->next
)
1820 if (d
->number
== num
)
1825 printf_unfiltered (_("No display number %d.\n"), num
);
1828 while (*p
== ' ' || *p
== '\t')
1834 disable_display_command (char *args
, int from_tty
)
1842 for (d
= display_chain
; d
; d
= d
->next
)
1849 while (*p1
>= '0' && *p1
<= '9')
1851 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1852 error (_("Arguments must be display numbers."));
1854 disable_display (atoi (p
));
1857 while (*p
== ' ' || *p
== '\t')
1862 /* Return 1 if D uses SOLIB (and will become dangling when SOLIB
1863 is unloaded), otherwise return 0. */
1866 display_uses_solib_p (const struct display
*d
,
1867 const struct so_list
*solib
)
1870 struct expression
*const exp
= d
->exp
;
1871 const union exp_element
*const elts
= exp
->elts
;
1873 if (d
->block
!= NULL
1874 && d
->pspace
== solib
->pspace
1875 && solib_contains_address_p (solib
, d
->block
->startaddr
))
1878 for (endpos
= exp
->nelts
; endpos
> 0; )
1880 int i
, args
, oplen
= 0;
1882 exp
->language_defn
->la_exp_desc
->operator_length (exp
, endpos
,
1884 gdb_assert (oplen
> 0);
1887 if (elts
[i
].opcode
== OP_VAR_VALUE
)
1889 const struct block
*const block
= elts
[i
+ 1].block
;
1890 const struct symbol
*const symbol
= elts
[i
+ 2].symbol
;
1893 && solib_contains_address_p (solib
,
1897 /* SYMBOL_OBJ_SECTION (symbol) may be NULL. */
1898 if (SYMBOL_SYMTAB (symbol
)->objfile
== solib
->objfile
)
1907 /* display_chain items point to blocks and expressions. Some expressions in
1908 turn may point to symbols.
1909 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1910 obstack_free'd when a shared library is unloaded.
1911 Clear pointers that are about to become dangling.
1912 Both .exp and .block fields will be restored next time we need to display
1913 an item by re-parsing .exp_string field in the new execution context. */
1916 clear_dangling_display_expressions (struct so_list
*solib
)
1919 struct objfile
*objfile
= NULL
;
1921 for (d
= display_chain
; d
; d
= d
->next
)
1923 if (d
->exp
&& display_uses_solib_p (d
, solib
))
1933 /* Print the value in stack frame FRAME of a variable specified by a
1934 struct symbol. NAME is the name to print; if NULL then VAR's print
1935 name will be used. STREAM is the ui_file on which to print the
1936 value. INDENT specifies the number of indent levels to print
1937 before printing the variable name. */
1940 print_variable_and_value (const char *name
, struct symbol
*var
,
1941 struct frame_info
*frame
,
1942 struct ui_file
*stream
, int indent
)
1945 struct value_print_options opts
;
1948 name
= SYMBOL_PRINT_NAME (var
);
1950 fprintf_filtered (stream
, "%s%s = ", n_spaces (2 * indent
), name
);
1952 val
= read_var_value (var
, frame
);
1953 get_user_print_options (&opts
);
1954 common_val_print (val
, stream
, indent
, &opts
, current_language
);
1955 fprintf_filtered (stream
, "\n");
1959 printf_command (char *arg
, int from_tty
)
1963 char *string
= NULL
;
1964 struct value
**val_args
;
1966 char *current_substring
;
1968 int allocated_args
= 20;
1969 struct cleanup
*old_cleanups
;
1971 val_args
= xmalloc (allocated_args
* sizeof (struct value
*));
1972 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
1975 error_no_arg (_("format-control string and values to print"));
1977 /* Skip white space before format string */
1978 while (*s
== ' ' || *s
== '\t')
1981 /* A format string should follow, enveloped in double quotes. */
1983 error (_("Bad format string, missing '\"'."));
1985 /* Parse the format-control string and copy it into the string STRING,
1986 processing some kinds of escape sequence. */
1988 f
= string
= (char *) alloca (strlen (s
) + 1);
1996 error (_("Bad format string, non-terminated '\"'."));
2029 /* ??? TODO: handle other escape sequences */
2030 error (_("Unrecognized escape character \\%c in format string."),
2040 /* Skip over " and following space and comma. */
2043 while (*s
== ' ' || *s
== '\t')
2046 if (*s
!= ',' && *s
!= 0)
2047 error (_("Invalid argument syntax"));
2051 while (*s
== ' ' || *s
== '\t')
2054 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2055 substrings
= alloca (strlen (string
) * 2);
2056 current_substring
= substrings
;
2059 /* Now scan the string for %-specs and see what kinds of args they want.
2060 argclass[I] classifies the %-specs so we can give printf_filtered
2061 something of the right size. */
2065 int_arg
, long_arg
, long_long_arg
, ptr_arg
,
2066 string_arg
, wide_string_arg
, wide_char_arg
,
2067 double_arg
, long_double_arg
, decfloat_arg
2069 enum argclass
*argclass
;
2070 enum argclass this_argclass
;
2075 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2082 int seen_hash
= 0, seen_zero
= 0, lcount
= 0, seen_prec
= 0;
2083 int seen_space
= 0, seen_plus
= 0;
2084 int seen_big_l
= 0, seen_h
= 0, seen_big_h
= 0;
2085 int seen_big_d
= 0, seen_double_big_d
= 0;
2088 /* Check the validity of the format specifier, and work
2089 out what argument it expects. We only accept C89
2090 format strings, with the exception of long long (which
2091 we autoconf for). */
2093 /* Skip over "%%". */
2100 /* The first part of a format specifier is a set of flag
2102 while (strchr ("0-+ #", *f
))
2115 /* The next part of a format specifier is a width. */
2116 while (strchr ("0123456789", *f
))
2119 /* The next part of a format specifier is a precision. */
2124 while (strchr ("0123456789", *f
))
2128 /* The next part of a format specifier is a length modifier. */
2149 /* Decimal32 modifier. */
2155 /* Decimal64 and Decimal128 modifiers. */
2160 /* Check for a Decimal128. */
2164 seen_double_big_d
= 1;
2180 if (seen_space
|| seen_plus
)
2187 this_argclass
= int_arg
;
2188 else if (lcount
== 1)
2189 this_argclass
= long_arg
;
2191 this_argclass
= long_long_arg
;
2198 this_argclass
= lcount
== 0 ? int_arg
: wide_char_arg
;
2199 if (lcount
> 1 || seen_h
|| seen_big_l
)
2201 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2206 this_argclass
= ptr_arg
;
2207 if (lcount
|| seen_h
|| seen_big_l
)
2209 if (seen_prec
|| seen_zero
|| seen_space
|| seen_plus
)
2214 this_argclass
= lcount
== 0 ? string_arg
: wide_string_arg
;
2215 if (lcount
> 1 || seen_h
|| seen_big_l
)
2217 if (seen_zero
|| seen_space
|| seen_plus
)
2226 if (seen_big_h
|| seen_big_d
|| seen_double_big_d
)
2227 this_argclass
= decfloat_arg
;
2228 else if (seen_big_l
)
2229 this_argclass
= long_double_arg
;
2231 this_argclass
= double_arg
;
2233 if (lcount
|| seen_h
)
2238 error (_("`*' not supported for precision or width in printf"));
2241 error (_("Format specifier `n' not supported in printf"));
2244 error (_("Incomplete format specifier at end of format string"));
2247 error (_("Unrecognized format specifier '%c' in printf"), *f
);
2251 error (_("Inappropriate modifiers to format specifier '%c' in printf"),
2256 if (lcount
> 1 && USE_PRINTF_I64
)
2258 /* Windows' printf does support long long, but not the usual way.
2259 Convert %lld to %I64d. */
2260 int length_before_ll
= f
- last_arg
- 1 - lcount
;
2261 strncpy (current_substring
, last_arg
, length_before_ll
);
2262 strcpy (current_substring
+ length_before_ll
, "I64");
2263 current_substring
[length_before_ll
+ 3] =
2264 last_arg
[length_before_ll
+ lcount
];
2265 current_substring
+= length_before_ll
+ 4;
2267 else if (this_argclass
== wide_string_arg
2268 || this_argclass
== wide_char_arg
)
2270 /* Convert %ls or %lc to %s. */
2271 int length_before_ls
= f
- last_arg
- 2;
2272 strncpy (current_substring
, last_arg
, length_before_ls
);
2273 strcpy (current_substring
+ length_before_ls
, "s");
2274 current_substring
+= length_before_ls
+ 2;
2278 strncpy (current_substring
, last_arg
, f
- last_arg
);
2279 current_substring
+= f
- last_arg
;
2281 *current_substring
++ = '\0';
2283 argclass
[nargs_wanted
++] = this_argclass
;
2286 /* Now, parse all arguments and evaluate them.
2287 Store the VALUEs in VAL_ARGS. */
2292 if (nargs
== allocated_args
)
2293 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2294 (allocated_args
*= 2)
2295 * sizeof (struct value
*));
2297 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2305 if (nargs
!= nargs_wanted
)
2306 error (_("Wrong number of arguments for specified format-string"));
2308 /* Now actually print them. */
2309 current_substring
= substrings
;
2310 for (i
= 0; i
< nargs
; i
++)
2312 switch (argclass
[i
])
2319 tem
= value_as_address (val_args
[i
]);
2321 /* This is a %s argument. Find the length of the string. */
2326 read_memory (tem
+ j
, &c
, 1);
2331 /* Copy the string contents into a string inside GDB. */
2332 str
= (gdb_byte
*) alloca (j
+ 1);
2334 read_memory (tem
, str
, j
);
2337 printf_filtered (current_substring
, (char *) str
);
2340 case wide_string_arg
:
2345 struct gdbarch
*gdbarch
2346 = get_type_arch (value_type (val_args
[i
]));
2347 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2348 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2349 "wchar_t", NULL
, 0);
2350 int wcwidth
= TYPE_LENGTH (wctype
);
2351 gdb_byte
*buf
= alloca (wcwidth
);
2352 struct obstack output
;
2353 struct cleanup
*inner_cleanup
;
2355 tem
= value_as_address (val_args
[i
]);
2357 /* This is a %s argument. Find the length of the string. */
2358 for (j
= 0;; j
+= wcwidth
)
2361 read_memory (tem
+ j
, buf
, wcwidth
);
2362 if (extract_unsigned_integer (buf
, wcwidth
, byte_order
) == 0)
2366 /* Copy the string contents into a string inside GDB. */
2367 str
= (gdb_byte
*) alloca (j
+ wcwidth
);
2369 read_memory (tem
, str
, j
);
2370 memset (&str
[j
], 0, wcwidth
);
2372 obstack_init (&output
);
2373 inner_cleanup
= make_cleanup_obstack_free (&output
);
2375 convert_between_encodings (target_wide_charset (gdbarch
),
2378 &output
, translit_char
);
2379 obstack_grow_str0 (&output
, "");
2381 printf_filtered (current_substring
, obstack_base (&output
));
2382 do_cleanups (inner_cleanup
);
2387 struct gdbarch
*gdbarch
2388 = get_type_arch (value_type (val_args
[i
]));
2389 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2390 struct type
*wctype
= lookup_typename (current_language
, gdbarch
,
2391 "wchar_t", NULL
, 0);
2392 struct type
*valtype
;
2393 struct obstack output
;
2394 struct cleanup
*inner_cleanup
;
2395 const gdb_byte
*bytes
;
2397 valtype
= value_type (val_args
[i
]);
2398 if (TYPE_LENGTH (valtype
) != TYPE_LENGTH (wctype
)
2399 || TYPE_CODE (valtype
) != TYPE_CODE_INT
)
2400 error (_("expected wchar_t argument for %%lc"));
2402 bytes
= value_contents (val_args
[i
]);
2404 obstack_init (&output
);
2405 inner_cleanup
= make_cleanup_obstack_free (&output
);
2407 convert_between_encodings (target_wide_charset (gdbarch
),
2409 bytes
, TYPE_LENGTH (valtype
),
2410 TYPE_LENGTH (valtype
),
2411 &output
, translit_char
);
2412 obstack_grow_str0 (&output
, "");
2414 printf_filtered (current_substring
, obstack_base (&output
));
2415 do_cleanups (inner_cleanup
);
2420 struct type
*type
= value_type (val_args
[i
]);
2424 /* If format string wants a float, unchecked-convert the value
2425 to floating point of the same size. */
2426 type
= float_type_from_length (type
);
2427 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2429 error (_("Invalid floating value found in program."));
2431 printf_filtered (current_substring
, (double) val
);
2434 case long_double_arg
:
2435 #ifdef HAVE_LONG_DOUBLE
2437 struct type
*type
= value_type (val_args
[i
]);
2441 /* If format string wants a float, unchecked-convert the value
2442 to floating point of the same size. */
2443 type
= float_type_from_length (type
);
2444 val
= unpack_double (type
, value_contents (val_args
[i
]), &inv
);
2446 error (_("Invalid floating value found in program."));
2448 printf_filtered (current_substring
, (long double) val
);
2452 error (_("long double not supported in printf"));
2455 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2457 long long val
= value_as_long (val_args
[i
]);
2458 printf_filtered (current_substring
, val
);
2462 error (_("long long not supported in printf"));
2466 int val
= value_as_long (val_args
[i
]);
2467 printf_filtered (current_substring
, val
);
2472 long val
= value_as_long (val_args
[i
]);
2473 printf_filtered (current_substring
, val
);
2477 /* Handles decimal floating values. */
2480 const gdb_byte
*param_ptr
= value_contents (val_args
[i
]);
2481 #if defined (PRINTF_HAS_DECFLOAT)
2482 /* If we have native support for Decimal floating
2483 printing, handle it here. */
2484 printf_filtered (current_substring
, param_ptr
);
2487 /* As a workaround until vasprintf has native support for DFP
2488 we convert the DFP values to string and print them using
2489 the %s format specifier. */
2492 int nnull_chars
= 0;
2494 /* Parameter data. */
2495 struct type
*param_type
= value_type (val_args
[i
]);
2496 unsigned int param_len
= TYPE_LENGTH (param_type
);
2497 struct gdbarch
*gdbarch
= get_type_arch (param_type
);
2498 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
2500 /* DFP output data. */
2501 struct value
*dfp_value
= NULL
;
2505 struct type
*dfp_type
= NULL
;
2506 char decstr
[MAX_DECIMAL_STRING
];
2508 /* Points to the end of the string so that we can go back
2509 and check for DFP length modifiers. */
2510 eos
= current_substring
+ strlen (current_substring
);
2512 /* Look for the float/double format specifier. */
2513 while (*eos
!= 'f' && *eos
!= 'e' && *eos
!= 'E'
2514 && *eos
!= 'g' && *eos
!= 'G')
2519 /* Search for the '%' char and extract the size and type of
2520 the output decimal value based on its modifiers
2521 (%Hf, %Df, %DDf). */
2522 while (*--sos
!= '%')
2527 dfp_type
= builtin_type (gdbarch
)->builtin_decfloat
;
2529 else if (*sos
== 'D' && *(sos
- 1) == 'D')
2532 dfp_type
= builtin_type (gdbarch
)->builtin_declong
;
2538 dfp_type
= builtin_type (gdbarch
)->builtin_decdouble
;
2542 /* Replace %Hf, %Df and %DDf with %s's. */
2545 /* Go through the whole format string and pull the correct
2546 number of chars back to compensate for the change in the
2547 format specifier. */
2548 while (nnull_chars
< nargs
- i
)
2556 /* Conversion between different DFP types. */
2557 if (TYPE_CODE (param_type
) == TYPE_CODE_DECFLOAT
)
2558 decimal_convert (param_ptr
, param_len
, byte_order
,
2559 dec
, dfp_len
, byte_order
);
2561 /* If this is a non-trivial conversion, just output 0.
2562 A correct converted value can be displayed by explicitly
2563 casting to a DFP type. */
2564 decimal_from_string (dec
, dfp_len
, byte_order
, "0");
2566 dfp_value
= value_from_decfloat (dfp_type
, dec
);
2568 dfp_ptr
= (gdb_byte
*) value_contents (dfp_value
);
2570 decimal_to_string (dfp_ptr
, dfp_len
, byte_order
, decstr
);
2572 /* Print the DFP value. */
2573 printf_filtered (current_substring
, decstr
);
2581 /* We avoid the host's %p because pointers are too
2582 likely to be the wrong size. The only interesting
2583 modifier for %p is a width; extract that, and then
2584 handle %p as glibc would: %#x or a literal "(nil)". */
2586 char *p
, *fmt
, *fmt_p
;
2587 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2588 long long val
= value_as_long (val_args
[i
]);
2590 long val
= value_as_long (val_args
[i
]);
2593 fmt
= alloca (strlen (current_substring
) + 5);
2595 /* Copy up to the leading %. */
2596 p
= current_substring
;
2600 int is_percent
= (*p
== '%');
2614 /* Copy any width. */
2615 while (*p
>= '0' && *p
< '9')
2618 gdb_assert (*p
== 'p' && *(p
+ 1) == '\0');
2621 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2627 printf_filtered (fmt
, val
);
2633 printf_filtered (fmt
, "(nil)");
2639 internal_error (__FILE__
, __LINE__
,
2640 _("failed internal consistency check"));
2642 /* Skip to the next substring. */
2643 current_substring
+= strlen (current_substring
) + 1;
2645 /* Print the portion of the format string after the last argument.
2646 Note that this will not include any ordinary %-specs, but it
2647 might include "%%". That is why we use printf_filtered and not
2648 puts_filtered here. Also, we pass a dummy argument because
2649 some platforms have modified GCC to include -Wformat-security
2650 by default, which will warn here if there is no argument. */
2651 printf_filtered (last_arg
, 0);
2653 do_cleanups (old_cleanups
);
2657 _initialize_printcmd (void)
2659 struct cmd_list_element
*c
;
2661 current_display_number
= -1;
2663 observer_attach_solib_unloaded (clear_dangling_display_expressions
);
2665 add_info ("address", address_info
,
2666 _("Describe where symbol SYM is stored."));
2668 add_info ("symbol", sym_info
, _("\
2669 Describe what symbol is at location ADDR.\n\
2670 Only for symbols with fixed locations (global or static scope)."));
2672 add_com ("x", class_vars
, x_command
, _("\
2673 Examine memory: x/FMT ADDRESS.\n\
2674 ADDRESS is an expression for the memory address to examine.\n\
2675 FMT is a repeat count followed by a format letter and a size letter.\n\
2676 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2677 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2678 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2679 The specified number of objects of the specified size are printed\n\
2680 according to the format.\n\n\
2681 Defaults for format and size letters are those previously used.\n\
2682 Default count is 1. Default address is following last thing printed\n\
2683 with this command or \"print\"."));
2686 add_com ("whereis", class_vars
, whereis_command
,
2687 _("Print line number and file of definition of variable."));
2690 add_info ("display", display_info
, _("\
2691 Expressions to display when program stops, with code numbers."));
2693 add_cmd ("undisplay", class_vars
, undisplay_command
, _("\
2694 Cancel some expressions to be displayed when program stops.\n\
2695 Arguments are the code numbers of the expressions to stop displaying.\n\
2696 No argument means cancel all automatic-display expressions.\n\
2697 \"delete display\" has the same effect as this command.\n\
2698 Do \"info display\" to see current list of code numbers."),
2701 add_com ("display", class_vars
, display_command
, _("\
2702 Print value of expression EXP each time the program stops.\n\
2703 /FMT may be used before EXP as in the \"print\" command.\n\
2704 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2705 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2706 and examining is done as in the \"x\" command.\n\n\
2707 With no argument, display all currently requested auto-display expressions.\n\
2708 Use \"undisplay\" to cancel display requests previously made."));
2710 add_cmd ("display", class_vars
, enable_display
, _("\
2711 Enable some expressions to be displayed when program stops.\n\
2712 Arguments are the code numbers of the expressions to resume displaying.\n\
2713 No argument means enable all automatic-display expressions.\n\
2714 Do \"info display\" to see current list of code numbers."), &enablelist
);
2716 add_cmd ("display", class_vars
, disable_display_command
, _("\
2717 Disable some expressions to be displayed when program stops.\n\
2718 Arguments are the code numbers of the expressions to stop displaying.\n\
2719 No argument means disable all automatic-display expressions.\n\
2720 Do \"info display\" to see current list of code numbers."), &disablelist
);
2722 add_cmd ("display", class_vars
, undisplay_command
, _("\
2723 Cancel some expressions to be displayed when program stops.\n\
2724 Arguments are the code numbers of the expressions to stop displaying.\n\
2725 No argument means cancel all automatic-display expressions.\n\
2726 Do \"info display\" to see current list of code numbers."), &deletelist
);
2728 add_com ("printf", class_vars
, printf_command
, _("\
2729 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2730 This is useful for formatted output in user-defined commands."));
2732 add_com ("output", class_vars
, output_command
, _("\
2733 Like \"print\" but don't put in value history and don't print newline.\n\
2734 This is useful in user-defined commands."));
2736 add_prefix_cmd ("set", class_vars
, set_command
, _("\
2737 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2738 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2739 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2740 with $), a register (a few standard names starting with $), or an actual\n\
2741 variable in the program being debugged. EXP is any valid expression.\n\
2742 Use \"set variable\" for variables with names identical to set subcommands.\n\
2744 With a subcommand, this command modifies parts of the gdb environment.\n\
2745 You can see these environment settings with the \"show\" command."),
2746 &setlist
, "set ", 1, &cmdlist
);
2748 add_com ("assign", class_vars
, set_command
, _("\
2749 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2750 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2751 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2752 with $), a register (a few standard names starting with $), or an actual\n\
2753 variable in the program being debugged. EXP is any valid expression.\n\
2754 Use \"set variable\" for variables with names identical to set subcommands.\n\
2755 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2756 You can see these environment settings with the \"show\" command."));
2758 /* "call" is the same as "set", but handy for dbx users to call fns. */
2759 c
= add_com ("call", class_vars
, call_command
, _("\
2760 Call a function in the program.\n\
2761 The argument is the function name and arguments, in the notation of the\n\
2762 current working language. The result is printed and saved in the value\n\
2763 history, if it is not void."));
2764 set_cmd_completer (c
, expression_completer
);
2766 add_cmd ("variable", class_vars
, set_command
, _("\
2767 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2768 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2769 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2770 with $), a register (a few standard names starting with $), or an actual\n\
2771 variable in the program being debugged. EXP is any valid expression.\n\
2772 This may usually be abbreviated to simply \"set\"."),
2775 c
= add_com ("print", class_vars
, print_command
, _("\
2776 Print value of expression EXP.\n\
2777 Variables accessible are those of the lexical environment of the selected\n\
2778 stack frame, plus all those whose scope is global or an entire file.\n\
2780 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2781 $$NUM refers to NUM'th value back from the last one.\n\
2782 Names starting with $ refer to registers (with the values they would have\n\
2783 if the program were to return to the stack frame now selected, restoring\n\
2784 all registers saved by frames farther in) or else to debugger\n\
2785 \"convenience\" variables (any such name not a known register).\n\
2786 Use assignment expressions to give values to convenience variables.\n\
2788 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2789 @ is a binary operator for treating consecutive data objects\n\
2790 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2791 element is FOO, whose second element is stored in the space following\n\
2792 where FOO is stored, etc. FOO must be an expression whose value\n\
2793 resides in memory.\n\
2795 EXP may be preceded with /FMT, where FMT is a format letter\n\
2796 but no count or size letter (see \"x\" command)."));
2797 set_cmd_completer (c
, expression_completer
);
2798 add_com_alias ("p", "print", class_vars
, 1);
2800 c
= add_com ("inspect", class_vars
, inspect_command
, _("\
2801 Same as \"print\" command, except that if you are running in the epoch\n\
2802 environment, the value is printed in its own window."));
2803 set_cmd_completer (c
, expression_completer
);
2805 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class
,
2806 &max_symbolic_offset
, _("\
2807 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2808 Show the largest offset that will be printed in <symbol+1234> form."), NULL
,
2810 show_max_symbolic_offset
,
2811 &setprintlist
, &showprintlist
);
2812 add_setshow_boolean_cmd ("symbol-filename", no_class
,
2813 &print_symbol_filename
, _("\
2814 Set printing of source filename and line number with <symbol>."), _("\
2815 Show printing of source filename and line number with <symbol>."), NULL
,
2817 show_print_symbol_filename
,
2818 &setprintlist
, &showprintlist
);