1 /* Print values for GNU debugger GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
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 2 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, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
31 #include "expression.h"
35 #include "breakpoint.h"
39 #include "symfile.h" /* for overlay functions */
40 #include "objfiles.h" /* ditto */
41 #include "completer.h" /* for completion functions */
43 #include "gdb_assert.h"
47 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
48 extern int addressprint
; /* Whether to print hex addresses in HLL " */
57 /* Last specified output format. */
59 static char last_format
= 'x';
61 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
63 static char last_size
= 'w';
65 /* Default address to examine next. */
67 static CORE_ADDR next_address
;
69 /* Default section to examine next. */
71 static asection
*next_section
;
73 /* Last address examined. */
75 static CORE_ADDR last_examine_address
;
77 /* Contents of last address examined.
78 This is not valid past the end of the `x' command! */
80 static struct value
*last_examine_value
;
82 /* Largest offset between a symbolic value and an address, that will be
83 printed as `0x1234 <symbol+offset>'. */
85 static unsigned int max_symbolic_offset
= UINT_MAX
;
87 /* Append the source filename and linenumber of the symbol when
88 printing a symbolic value as `<symbol at filename:linenum>' if set. */
89 static int print_symbol_filename
= 0;
91 /* Number of auto-display expression currently being displayed.
92 So that we can disable it if we get an error or a signal within it.
93 -1 when not doing one. */
95 int current_display_number
;
97 /* Flag to low-level print routines that this value is being printed
98 in an epoch window. We'd like to pass this as a parameter, but
99 every routine would need to take it. Perhaps we can encapsulate
100 this in the I/O stream once we have GNU stdio. */
106 /* Chain link to next auto-display item. */
107 struct display
*next
;
108 /* Expression to be evaluated and displayed. */
109 struct expression
*exp
;
110 /* Item number of this auto-display item. */
112 /* Display format specified. */
113 struct format_data format
;
114 /* Innermost block required by this expression when evaluated */
116 /* Status of this display (enabled or disabled) */
120 /* Chain of expressions whose values should be displayed
121 automatically each time the program stops. */
123 static struct display
*display_chain
;
125 static int display_number
;
127 /* Prototypes for exported functions. */
129 void output_command (char *, int);
131 void _initialize_printcmd (void);
133 /* Prototypes for local functions. */
135 static void delete_display (int);
137 static void enable_display (char *, int);
139 static void disable_display_command (char *, int);
141 static void printf_command (char *, int);
143 static void print_frame_nameless_args (struct frame_info
*, long,
144 int, int, struct ui_file
*);
146 static void display_info (char *, int);
148 static void do_one_display (struct display
*);
150 static void undisplay_command (char *, int);
152 static void free_display (struct display
*);
154 static void display_command (char *, int);
156 void x_command (char *, int);
158 static void address_info (char *, int);
160 static void set_command (char *, int);
162 static void call_command (char *, int);
164 static void inspect_command (char *, int);
166 static void print_command (char *, int);
168 static void print_command_1 (char *, int, int);
170 static void validate_format (struct format_data
, char *);
172 static void do_examine (struct format_data
, CORE_ADDR addr
,
175 static void print_formatted (struct value
*, int, int, struct ui_file
*);
177 static struct format_data
decode_format (char **, int, int);
179 static void sym_info (char *, int);
182 /* Decode a format specification. *STRING_PTR should point to it.
183 OFORMAT and OSIZE are used as defaults for the format and size
184 if none are given in the format specification.
185 If OSIZE is zero, then the size field of the returned value
186 should be set only if a size is explicitly specified by the
188 The structure returned describes all the data
189 found in the specification. In addition, *STRING_PTR is advanced
190 past the specification and past all whitespace following it. */
192 static struct format_data
193 decode_format (char **string_ptr
, int oformat
, int osize
)
195 struct format_data val
;
196 register char *p
= *string_ptr
;
202 if (*p
>= '0' && *p
<= '9')
203 val
.count
= atoi (p
);
204 while (*p
>= '0' && *p
<= '9')
207 /* Now process size or format letters that follow. */
211 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
213 else if (*p
>= 'a' && *p
<= 'z')
219 while (*p
== ' ' || *p
== '\t')
223 /* Set defaults for format and size if not specified. */
224 if (val
.format
== '?')
228 /* Neither has been specified. */
229 val
.format
= oformat
;
233 /* If a size is specified, any format makes a reasonable
234 default except 'i'. */
235 val
.format
= oformat
== 'i' ? 'x' : oformat
;
237 else if (val
.size
== '?')
242 /* Pick the appropriate size for an address. */
243 if (TARGET_PTR_BIT
== 64)
244 val
.size
= osize
? 'g' : osize
;
245 else if (TARGET_PTR_BIT
== 32)
246 val
.size
= osize
? 'w' : osize
;
247 else if (TARGET_PTR_BIT
== 16)
248 val
.size
= osize
? 'h' : osize
;
250 /* Bad value for TARGET_PTR_BIT */
251 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
254 /* Floating point has to be word or giantword. */
255 if (osize
== 'w' || osize
== 'g')
258 /* Default it to giantword if the last used size is not
260 val
.size
= osize
? 'g' : osize
;
263 /* Characters default to one byte. */
264 val
.size
= osize
? 'b' : osize
;
267 /* The default is the size most recently specified. */
274 /* Print value VAL on stream according to FORMAT, a letter or 0.
275 Do not end with a newline.
276 0 means print VAL according to its own type.
277 SIZE is the letter for the size of datum being printed.
278 This is used to pad hex numbers so they line up. */
281 print_formatted (struct value
*val
, register int format
, int size
,
282 struct ui_file
*stream
)
284 struct type
*type
= check_typedef (VALUE_TYPE (val
));
285 int len
= TYPE_LENGTH (type
);
287 if (VALUE_LVAL (val
) == lval_memory
)
289 next_address
= VALUE_ADDRESS (val
) + len
;
290 next_section
= VALUE_BFD_SECTION (val
);
296 /* FIXME: Need to handle wchar_t's here... */
297 next_address
= VALUE_ADDRESS (val
)
298 + val_print_string (VALUE_ADDRESS (val
), -1, 1, stream
);
299 next_section
= VALUE_BFD_SECTION (val
);
303 /* The old comment says
304 "Force output out, print_insn not using _filtered".
305 I'm not completely sure what that means, I suspect most print_insn
306 now do use _filtered, so I guess it's obsolete.
307 --Yes, it does filter now, and so this is obsolete. -JB */
309 /* We often wrap here if there are long symbolic names. */
311 next_address
= VALUE_ADDRESS (val
)
312 + gdb_print_insn (VALUE_ADDRESS (val
), stream
);
313 next_section
= VALUE_BFD_SECTION (val
);
318 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
319 || TYPE_CODE (type
) == TYPE_CODE_STRING
320 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
321 || TYPE_CODE (type
) == TYPE_CODE_UNION
)
322 /* If format is 0, use the 'natural' format for
323 * that type of value. If the type is non-scalar,
324 * we have to use language rules to print it as
325 * a series of scalars.
327 value_print (val
, stream
, format
, Val_pretty_default
);
329 /* User specified format, so don't look to the
330 * the type to tell us what to do.
332 print_scalar_formatted (VALUE_CONTENTS (val
), type
,
333 format
, size
, stream
);
337 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
338 according to letters FORMAT and SIZE on STREAM.
339 FORMAT may not be zero. Formats s and i are not supported at this level.
341 This is how the elements of an array or structure are printed
345 print_scalar_formatted (void *valaddr
, struct type
*type
, int format
, int size
,
346 struct ui_file
*stream
)
349 unsigned int len
= TYPE_LENGTH (type
);
351 if (len
> sizeof (LONGEST
)
359 if (!TYPE_UNSIGNED (type
)
360 || !extract_long_unsigned_integer (valaddr
, len
, &val_long
))
362 /* We can't print it normally, but we can print it in hex.
363 Printing it in the wrong radix is more useful than saying
364 "use /x, you dummy". */
365 /* FIXME: we could also do octal or binary if that was the
367 /* FIXME: we should be using the size field to give us a
368 minimum field width to print. */
371 print_octal_chars (stream
, valaddr
, len
);
372 else if (format
== 'd')
373 print_decimal_chars (stream
, valaddr
, len
);
374 else if (format
== 't')
375 print_binary_chars (stream
, valaddr
, len
);
377 /* replace with call to print_hex_chars? Looks
378 like val_print_type_code_int is redoing
381 val_print_type_code_int (type
, valaddr
, stream
);
386 /* If we get here, extract_long_unsigned_integer set val_long. */
388 else if (format
!= 'f')
389 val_long
= unpack_long (type
, valaddr
);
391 /* If the value is a pointer, and pointers and addresses are not the
392 same, then at this point, the value's length (in target bytes) is
393 TARGET_ADDR_BIT/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
394 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
395 len
= TARGET_ADDR_BIT
/ TARGET_CHAR_BIT
;
397 /* If we are printing it as unsigned, truncate it in case it is actually
398 a negative signed value (e.g. "print/u (short)-1" should print 65535
399 (if shorts are 16 bits) instead of 4294967295). */
402 if (len
< sizeof (LONGEST
))
403 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
411 /* no size specified, like in print. Print varying # of digits. */
412 print_longest (stream
, 'x', 1, val_long
);
421 print_longest (stream
, size
, 1, val_long
);
424 error ("Undefined output size \"%c\".", size
);
429 print_longest (stream
, 'd', 1, val_long
);
433 print_longest (stream
, 'u', 0, val_long
);
438 print_longest (stream
, 'o', 1, val_long
);
440 fprintf_filtered (stream
, "0");
445 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
446 print_address (addr
, stream
);
451 value_print (value_from_longest (builtin_type_true_char
, val_long
),
452 stream
, 0, Val_pretty_default
);
456 if (len
== TYPE_LENGTH (builtin_type_float
))
457 type
= builtin_type_float
;
458 else if (len
== TYPE_LENGTH (builtin_type_double
))
459 type
= builtin_type_double
;
460 else if (len
== TYPE_LENGTH (builtin_type_long_double
))
461 type
= builtin_type_long_double
;
462 print_floating (valaddr
, type
, stream
);
466 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
469 /* Binary; 't' stands for "two". */
471 char bits
[8 * (sizeof val_long
) + 1];
472 char buf
[8 * (sizeof val_long
) + 32];
477 width
= 8 * (sizeof val_long
);
494 error ("Undefined output size \"%c\".", size
);
500 bits
[width
] = (val_long
& 1) ? '1' : '0';
505 while (*cp
&& *cp
== '0')
510 strcpy (buf
, local_binary_format_prefix ());
512 strcat (buf
, local_binary_format_suffix ());
513 fprintf_filtered (stream
, buf
);
518 error ("Undefined output format \"%c\".", format
);
522 /* Specify default address for `x' command.
523 `info lines' uses this. */
526 set_next_address (CORE_ADDR addr
)
530 /* Make address available to the user as $_. */
531 set_internalvar (lookup_internalvar ("_"),
532 value_from_pointer (lookup_pointer_type (builtin_type_void
),
536 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
537 after LEADIN. Print nothing if no symbolic name is found nearby.
538 Optionally also print source file and line number, if available.
539 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
540 or to interpret it as a possible C++ name and convert it back to source
541 form. However note that DO_DEMANGLE can be overridden by the specific
542 settings of the demangle and asm_demangle variables. */
545 print_address_symbolic (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
,
549 char *filename
= NULL
;
554 /* throw away both name and filename */
555 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
556 make_cleanup (free_current_contents
, &filename
);
558 if (build_address_symbolic (addr
, do_demangle
, &name
, &offset
, &filename
, &line
, &unmapped
))
560 do_cleanups (cleanup_chain
);
564 fputs_filtered (leadin
, stream
);
566 fputs_filtered ("<*", stream
);
568 fputs_filtered ("<", stream
);
569 fputs_filtered (name
, stream
);
571 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
573 /* Append source filename and line number if desired. Give specific
574 line # of this addr, if we have it; else line # of the nearest symbol. */
575 if (print_symbol_filename
&& filename
!= NULL
)
578 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
580 fprintf_filtered (stream
, " in %s", filename
);
583 fputs_filtered ("*>", stream
);
585 fputs_filtered (">", stream
);
587 do_cleanups (cleanup_chain
);
590 /* Given an address ADDR return all the elements needed to print the
591 address in a symbolic form. NAME can be mangled or not depending
592 on DO_DEMANGLE (and also on the asm_demangle global variable,
593 manipulated via ''set print asm-demangle''). Return 0 in case of
594 success, when all the info in the OUT paramters is valid. Return 1
597 build_address_symbolic (CORE_ADDR addr
, /* IN */
598 int do_demangle
, /* IN */
599 char **name
, /* OUT */
600 int *offset
, /* OUT */
601 char **filename
, /* OUT */
603 int *unmapped
) /* OUT */
605 struct minimal_symbol
*msymbol
;
606 struct symbol
*symbol
;
607 struct symtab
*symtab
= 0;
608 CORE_ADDR name_location
= 0;
609 asection
*section
= 0;
610 char *name_temp
= "";
612 /* Let's say it is unmapped. */
615 /* Determine if the address is in an overlay, and whether it is
617 if (overlay_debugging
)
619 section
= find_pc_overlay (addr
);
620 if (pc_in_unmapped_range (addr
, section
))
623 addr
= overlay_mapped_address (addr
, section
);
627 /* First try to find the address in the symbol table, then
628 in the minsyms. Take the closest one. */
630 /* This is defective in the sense that it only finds text symbols. So
631 really this is kind of pointless--we should make sure that the
632 minimal symbols have everything we need (by changing that we could
633 save some memory, but for many debug format--ELF/DWARF or
634 anything/stabs--it would be inconvenient to eliminate those minimal
636 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
637 symbol
= find_pc_sect_function (addr
, section
);
641 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
642 if (do_demangle
|| asm_demangle
)
643 name_temp
= SYMBOL_PRINT_NAME (symbol
);
645 name_temp
= DEPRECATED_SYMBOL_NAME (symbol
);
650 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
652 /* The msymbol is closer to the address than the symbol;
653 use the msymbol instead. */
656 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
657 if (do_demangle
|| asm_demangle
)
658 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
660 name_temp
= DEPRECATED_SYMBOL_NAME (msymbol
);
663 if (symbol
== NULL
&& msymbol
== NULL
)
666 /* If the nearest symbol is too far away, don't print anything symbolic. */
668 /* For when CORE_ADDR is larger than unsigned int, we do math in
669 CORE_ADDR. But when we detect unsigned wraparound in the
670 CORE_ADDR math, we ignore this test and print the offset,
671 because addr+max_symbolic_offset has wrapped through the end
672 of the address space back to the beginning, giving bogus comparison. */
673 if (addr
> name_location
+ max_symbolic_offset
674 && name_location
+ max_symbolic_offset
> name_location
)
677 *offset
= addr
- name_location
;
679 *name
= xstrdup (name_temp
);
681 if (print_symbol_filename
)
683 struct symtab_and_line sal
;
685 sal
= find_pc_sect_line (addr
, section
, 0);
689 *filename
= xstrdup (sal
.symtab
->filename
);
692 else if (symtab
&& symbol
&& symbol
->line
)
694 *filename
= xstrdup (symtab
->filename
);
695 *line
= symbol
->line
;
699 *filename
= xstrdup (symtab
->filename
);
706 /* Print address ADDR on STREAM. USE_LOCAL means the same thing as for
709 print_address_numeric (CORE_ADDR addr
, int use_local
, struct ui_file
*stream
)
711 /* Truncate address to the size of a target address, avoiding shifts
712 larger or equal than the width of a CORE_ADDR. The local
713 variable ADDR_BIT stops the compiler reporting a shift overflow
714 when it won't occur. */
715 /* NOTE: This assumes that the significant address information is
716 kept in the least significant bits of ADDR - the upper bits were
717 either zero or sign extended. Should ADDRESS_TO_POINTER() or
718 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
720 int addr_bit
= TARGET_ADDR_BIT
;
722 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
723 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
724 print_longest (stream
, 'x', use_local
, (ULONGEST
) addr
);
727 /* Print address ADDR symbolically on STREAM.
728 First print it as a number. Then perhaps print
729 <SYMBOL + OFFSET> after the number. */
732 print_address (CORE_ADDR addr
, struct ui_file
*stream
)
734 print_address_numeric (addr
, 1, stream
);
735 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
738 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
739 controls whether to print the symbolic name "raw" or demangled.
740 Global setting "addressprint" controls whether to print hex address
744 print_address_demangle (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
)
748 fprintf_filtered (stream
, "0");
750 else if (addressprint
)
752 print_address_numeric (addr
, 1, stream
);
753 print_address_symbolic (addr
, stream
, do_demangle
, " ");
757 print_address_symbolic (addr
, stream
, do_demangle
, "");
762 /* These are the types that $__ will get after an examine command of one
765 static struct type
*examine_i_type
;
767 static struct type
*examine_b_type
;
768 static struct type
*examine_h_type
;
769 static struct type
*examine_w_type
;
770 static struct type
*examine_g_type
;
772 /* Examine data at address ADDR in format FMT.
773 Fetch it from memory and print on gdb_stdout. */
776 do_examine (struct format_data fmt
, CORE_ADDR addr
, asection
*sect
)
778 register char format
= 0;
780 register int count
= 1;
781 struct type
*val_type
= NULL
;
783 register int maxelts
;
791 /* String or instruction format implies fetch single bytes
792 regardless of the specified size. */
793 if (format
== 's' || format
== 'i')
797 val_type
= examine_i_type
;
798 else if (size
== 'b')
799 val_type
= examine_b_type
;
800 else if (size
== 'h')
801 val_type
= examine_h_type
;
802 else if (size
== 'w')
803 val_type
= examine_w_type
;
804 else if (size
== 'g')
805 val_type
= examine_g_type
;
812 if (format
== 's' || format
== 'i')
815 /* Print as many objects as specified in COUNT, at most maxelts per line,
816 with the address of the next one at the start of each line. */
821 print_address (next_address
, gdb_stdout
);
822 printf_filtered (":");
827 printf_filtered ("\t");
828 /* Note that print_formatted sets next_address for the next
830 last_examine_address
= next_address
;
832 if (last_examine_value
)
833 value_free (last_examine_value
);
835 /* The value to be displayed is not fetched greedily.
836 Instead, to avoid the posibility of a fetched value not
837 being used, its retreval is delayed until the print code
838 uses it. When examining an instruction stream, the
839 disassembler will perform its own memory fetch using just
840 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
841 the disassembler be modified so that LAST_EXAMINE_VALUE
842 is left with the byte sequence from the last complete
843 instruction fetched from memory? */
844 last_examine_value
= value_at_lazy (val_type
, next_address
, sect
);
846 if (last_examine_value
)
847 release_value (last_examine_value
);
849 print_formatted (last_examine_value
, format
, size
, gdb_stdout
);
851 printf_filtered ("\n");
852 gdb_flush (gdb_stdout
);
857 validate_format (struct format_data fmt
, char *cmdname
)
860 error ("Size letters are meaningless in \"%s\" command.", cmdname
);
862 error ("Item count other than 1 is meaningless in \"%s\" command.",
864 if (fmt
.format
== 'i' || fmt
.format
== 's')
865 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
866 fmt
.format
, cmdname
);
869 /* Evaluate string EXP as an expression in the current language and
870 print the resulting value. EXP may contain a format specifier as the
871 first argument ("/x myvar" for example, to print myvar in hex).
875 print_command_1 (char *exp
, int inspect
, int voidprint
)
877 struct expression
*expr
;
878 register struct cleanup
*old_chain
= 0;
879 register char format
= 0;
881 struct format_data fmt
;
884 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
885 inspect_it
= inspect
;
887 if (exp
&& *exp
== '/')
890 fmt
= decode_format (&exp
, last_format
, 0);
891 validate_format (fmt
, "print");
892 last_format
= format
= fmt
.format
;
904 expr
= parse_expression (exp
);
905 old_chain
= make_cleanup (free_current_contents
, &expr
);
907 val
= evaluate_expression (expr
);
910 val
= access_value_history (0);
912 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
913 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
915 int histindex
= record_latest_value (val
);
918 annotate_value_history_begin (histindex
, VALUE_TYPE (val
));
920 annotate_value_begin (VALUE_TYPE (val
));
923 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
924 else if (histindex
>= 0)
925 printf_filtered ("$%d = ", histindex
);
928 annotate_value_history_value ();
930 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
931 printf_filtered ("\n");
934 annotate_value_history_end ();
936 annotate_value_end ();
939 printf_unfiltered ("\") )\030");
943 do_cleanups (old_chain
);
944 inspect_it
= 0; /* Reset print routines to normal */
949 print_command (char *exp
, int from_tty
)
951 print_command_1 (exp
, 0, 1);
954 /* Same as print, except in epoch, it gets its own window */
957 inspect_command (char *exp
, int from_tty
)
959 extern int epoch_interface
;
961 print_command_1 (exp
, epoch_interface
, 1);
964 /* Same as print, except it doesn't print void results. */
967 call_command (char *exp
, int from_tty
)
969 print_command_1 (exp
, 0, 0);
974 output_command (char *exp
, int from_tty
)
976 struct expression
*expr
;
977 register struct cleanup
*old_chain
;
978 register char format
= 0;
980 struct format_data fmt
;
982 if (exp
&& *exp
== '/')
985 fmt
= decode_format (&exp
, 0, 0);
986 validate_format (fmt
, "output");
990 expr
= parse_expression (exp
);
991 old_chain
= make_cleanup (free_current_contents
, &expr
);
993 val
= evaluate_expression (expr
);
995 annotate_value_begin (VALUE_TYPE (val
));
997 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
999 annotate_value_end ();
1002 gdb_flush (gdb_stdout
);
1004 do_cleanups (old_chain
);
1009 set_command (char *exp
, int from_tty
)
1011 struct expression
*expr
= parse_expression (exp
);
1012 register struct cleanup
*old_chain
=
1013 make_cleanup (free_current_contents
, &expr
);
1014 evaluate_expression (expr
);
1015 do_cleanups (old_chain
);
1020 sym_info (char *arg
, int from_tty
)
1022 struct minimal_symbol
*msymbol
;
1023 struct objfile
*objfile
;
1024 struct obj_section
*osect
;
1026 CORE_ADDR addr
, sect_addr
;
1028 unsigned int offset
;
1031 error_no_arg ("address");
1033 addr
= parse_and_eval_address (arg
);
1034 ALL_OBJSECTIONS (objfile
, osect
)
1036 sect
= osect
->the_bfd_section
;
1037 sect_addr
= overlay_mapped_address (addr
, sect
);
1039 if (osect
->addr
<= sect_addr
&& sect_addr
< osect
->endaddr
&&
1040 (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, sect
)))
1043 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1045 printf_filtered ("%s + %u in ",
1046 SYMBOL_PRINT_NAME (msymbol
), offset
);
1048 printf_filtered ("%s in ",
1049 SYMBOL_PRINT_NAME (msymbol
));
1050 if (pc_in_unmapped_range (addr
, sect
))
1051 printf_filtered ("load address range of ");
1052 if (section_is_overlay (sect
))
1053 printf_filtered ("%s overlay ",
1054 section_is_mapped (sect
) ? "mapped" : "unmapped");
1055 printf_filtered ("section %s", sect
->name
);
1056 printf_filtered ("\n");
1060 printf_filtered ("No symbol matches %s.\n", arg
);
1065 address_info (char *exp
, int from_tty
)
1067 register struct symbol
*sym
;
1068 register struct minimal_symbol
*msymbol
;
1070 register long basereg
;
1072 CORE_ADDR load_addr
;
1073 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1074 if exp is a field of `this'. */
1077 error ("Argument required.");
1079 sym
= lookup_symbol (exp
, get_selected_block (0), VAR_DOMAIN
,
1080 &is_a_field_of_this
, (struct symtab
**) NULL
);
1083 if (is_a_field_of_this
)
1085 printf_filtered ("Symbol \"");
1086 fprintf_symbol_filtered (gdb_stdout
, exp
,
1087 current_language
->la_language
, DMGL_ANSI
);
1088 printf_filtered ("\" is a field of the local class variable ");
1089 if (current_language
->la_language
== language_objc
)
1090 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1092 printf_filtered ("`this'\n");
1096 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1098 if (msymbol
!= NULL
)
1100 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1102 printf_filtered ("Symbol \"");
1103 fprintf_symbol_filtered (gdb_stdout
, exp
,
1104 current_language
->la_language
, DMGL_ANSI
);
1105 printf_filtered ("\" is at ");
1106 print_address_numeric (load_addr
, 1, gdb_stdout
);
1107 printf_filtered (" in a file compiled without debugging");
1108 section
= SYMBOL_BFD_SECTION (msymbol
);
1109 if (section_is_overlay (section
))
1111 load_addr
= overlay_unmapped_address (load_addr
, section
);
1112 printf_filtered (",\n -- loaded at ");
1113 print_address_numeric (load_addr
, 1, gdb_stdout
);
1114 printf_filtered (" in overlay section %s", section
->name
);
1116 printf_filtered (".\n");
1119 error ("No symbol \"%s\" in current context.", exp
);
1123 printf_filtered ("Symbol \"");
1124 fprintf_symbol_filtered (gdb_stdout
, DEPRECATED_SYMBOL_NAME (sym
),
1125 current_language
->la_language
, DMGL_ANSI
);
1126 printf_filtered ("\" is ");
1127 val
= SYMBOL_VALUE (sym
);
1128 basereg
= SYMBOL_BASEREG (sym
);
1129 section
= SYMBOL_BFD_SECTION (sym
);
1131 switch (SYMBOL_CLASS (sym
))
1134 case LOC_CONST_BYTES
:
1135 printf_filtered ("constant");
1139 printf_filtered ("a label at address ");
1140 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1142 if (section_is_overlay (section
))
1144 load_addr
= overlay_unmapped_address (load_addr
, section
);
1145 printf_filtered (",\n -- loaded at ");
1146 print_address_numeric (load_addr
, 1, gdb_stdout
);
1147 printf_filtered (" in overlay section %s", section
->name
);
1152 case LOC_COMPUTED_ARG
:
1153 (SYMBOL_LOCATION_FUNCS (sym
)->describe_location
) (sym
, gdb_stdout
);
1157 printf_filtered ("a variable in register %s", REGISTER_NAME (val
));
1161 printf_filtered ("static storage at address ");
1162 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1164 if (section_is_overlay (section
))
1166 load_addr
= overlay_unmapped_address (load_addr
, section
);
1167 printf_filtered (",\n -- loaded at ");
1168 print_address_numeric (load_addr
, 1, gdb_stdout
);
1169 printf_filtered (" in overlay section %s", section
->name
);
1174 printf_filtered ("external global (indirect addressing), at address *(");
1175 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1177 printf_filtered (")");
1178 if (section_is_overlay (section
))
1180 load_addr
= overlay_unmapped_address (load_addr
, section
);
1181 printf_filtered (",\n -- loaded at ");
1182 print_address_numeric (load_addr
, 1, gdb_stdout
);
1183 printf_filtered (" in overlay section %s", section
->name
);
1188 printf_filtered ("an argument in register %s", REGISTER_NAME (val
));
1191 case LOC_REGPARM_ADDR
:
1192 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val
));
1196 printf_filtered ("an argument at offset %ld", val
);
1200 printf_filtered ("an argument at frame offset %ld", val
);
1204 printf_filtered ("a local variable at frame offset %ld", val
);
1208 printf_filtered ("a reference argument at offset %ld", val
);
1212 printf_filtered ("a variable at offset %ld from register %s",
1213 val
, REGISTER_NAME (basereg
));
1216 case LOC_BASEREG_ARG
:
1217 printf_filtered ("an argument at offset %ld from register %s",
1218 val
, REGISTER_NAME (basereg
));
1222 printf_filtered ("a typedef");
1226 printf_filtered ("a function at address ");
1227 print_address_numeric (load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
1229 if (section_is_overlay (section
))
1231 load_addr
= overlay_unmapped_address (load_addr
, section
);
1232 printf_filtered (",\n -- loaded at ");
1233 print_address_numeric (load_addr
, 1, gdb_stdout
);
1234 printf_filtered (" in overlay section %s", section
->name
);
1238 case LOC_UNRESOLVED
:
1240 struct minimal_symbol
*msym
;
1242 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, NULL
);
1244 printf_filtered ("unresolved");
1247 section
= SYMBOL_BFD_SECTION (msym
);
1248 printf_filtered ("static storage at address ");
1249 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (msym
),
1251 if (section_is_overlay (section
))
1253 load_addr
= overlay_unmapped_address (load_addr
, section
);
1254 printf_filtered (",\n -- loaded at ");
1255 print_address_numeric (load_addr
, 1, gdb_stdout
);
1256 printf_filtered (" in overlay section %s", section
->name
);
1262 case LOC_HP_THREAD_LOCAL_STATIC
:
1264 "a thread-local variable at offset %ld from the thread base register %s",
1265 val
, REGISTER_NAME (basereg
));
1268 case LOC_THREAD_LOCAL_STATIC
:
1269 printf_filtered ("a thread-local variable at offset %ld in the "
1270 "thread-local storage for `%s'",
1271 val
, SYMBOL_OBJFILE (sym
)->name
);
1274 case LOC_OPTIMIZED_OUT
:
1275 printf_filtered ("optimized out");
1279 printf_filtered ("of unknown (botched) type");
1282 printf_filtered (".\n");
1286 x_command (char *exp
, int from_tty
)
1288 struct expression
*expr
;
1289 struct format_data fmt
;
1290 struct cleanup
*old_chain
;
1293 fmt
.format
= last_format
;
1294 fmt
.size
= last_size
;
1297 if (exp
&& *exp
== '/')
1300 fmt
= decode_format (&exp
, last_format
, last_size
);
1303 /* If we have an expression, evaluate it and use it as the address. */
1305 if (exp
!= 0 && *exp
!= 0)
1307 expr
= parse_expression (exp
);
1308 /* Cause expression not to be there any more
1309 if this command is repeated with Newline.
1310 But don't clobber a user-defined command's definition. */
1313 old_chain
= make_cleanup (free_current_contents
, &expr
);
1314 val
= evaluate_expression (expr
);
1315 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1316 val
= value_ind (val
);
1317 /* In rvalue contexts, such as this, functions are coerced into
1318 pointers to functions. This makes "x/i main" work. */
1319 if (/* last_format == 'i' && */
1320 TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1321 && VALUE_LVAL (val
) == lval_memory
)
1322 next_address
= VALUE_ADDRESS (val
);
1324 next_address
= value_as_address (val
);
1325 if (VALUE_BFD_SECTION (val
))
1326 next_section
= VALUE_BFD_SECTION (val
);
1327 do_cleanups (old_chain
);
1330 do_examine (fmt
, next_address
, next_section
);
1332 /* If the examine succeeds, we remember its size and format for next time. */
1333 last_size
= fmt
.size
;
1334 last_format
= fmt
.format
;
1336 /* Set a couple of internal variables if appropriate. */
1337 if (last_examine_value
)
1339 /* Make last address examined available to the user as $_. Use
1340 the correct pointer type. */
1341 struct type
*pointer_type
1342 = lookup_pointer_type (VALUE_TYPE (last_examine_value
));
1343 set_internalvar (lookup_internalvar ("_"),
1344 value_from_pointer (pointer_type
,
1345 last_examine_address
));
1347 /* Make contents of last address examined available to the user as $__. */
1348 /* If the last value has not been fetched from memory then don't
1349 fetch it now - instead mark it by voiding the $__ variable. */
1350 if (VALUE_LAZY (last_examine_value
))
1351 set_internalvar (lookup_internalvar ("__"),
1352 allocate_value (builtin_type_void
));
1354 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1359 /* Add an expression to the auto-display chain.
1360 Specify the expression. */
1363 display_command (char *exp
, int from_tty
)
1365 struct format_data fmt
;
1366 register struct expression
*expr
;
1367 register struct display
*new;
1371 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1373 if (tui_active
&& *exp
== '$')
1374 display_it
= (tui_set_layout (exp
) == TUI_FAILURE
);
1388 fmt
= decode_format (&exp
, 0, 0);
1389 if (fmt
.size
&& fmt
.format
== 0)
1391 if (fmt
.format
== 'i' || fmt
.format
== 's')
1401 innermost_block
= 0;
1402 expr
= parse_expression (exp
);
1404 new = (struct display
*) xmalloc (sizeof (struct display
));
1407 new->block
= innermost_block
;
1408 new->next
= display_chain
;
1409 new->number
= ++display_number
;
1412 display_chain
= new;
1414 if (from_tty
&& target_has_execution
)
1415 do_one_display (new);
1422 free_display (struct display
*d
)
1428 /* Clear out the display_chain.
1429 Done when new symtabs are loaded, since this invalidates
1430 the types stored in many expressions. */
1433 clear_displays (void)
1435 register struct display
*d
;
1437 while ((d
= display_chain
) != NULL
)
1440 display_chain
= d
->next
;
1445 /* Delete the auto-display number NUM. */
1448 delete_display (int num
)
1450 register struct display
*d1
, *d
;
1453 error ("No display number %d.", num
);
1455 if (display_chain
->number
== num
)
1458 display_chain
= d1
->next
;
1462 for (d
= display_chain
;; d
= d
->next
)
1465 error ("No display number %d.", num
);
1466 if (d
->next
->number
== num
)
1476 /* Delete some values from the auto-display chain.
1477 Specify the element numbers. */
1480 undisplay_command (char *args
, int from_tty
)
1482 register char *p
= args
;
1488 if (query ("Delete all auto-display expressions? "))
1497 while (*p1
>= '0' && *p1
<= '9')
1499 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1500 error ("Arguments must be display numbers.");
1504 delete_display (num
);
1507 while (*p
== ' ' || *p
== '\t')
1513 /* Display a single auto-display.
1514 Do nothing if the display cannot be printed in the current context,
1515 or if the display is disabled. */
1518 do_one_display (struct display
*d
)
1520 int within_current_scope
;
1522 if (d
->enabled_p
== 0)
1526 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1528 within_current_scope
= 1;
1529 if (!within_current_scope
)
1532 current_display_number
= d
->number
;
1534 annotate_display_begin ();
1535 printf_filtered ("%d", d
->number
);
1536 annotate_display_number_end ();
1537 printf_filtered (": ");
1543 annotate_display_format ();
1545 printf_filtered ("x/");
1546 if (d
->format
.count
!= 1)
1547 printf_filtered ("%d", d
->format
.count
);
1548 printf_filtered ("%c", d
->format
.format
);
1549 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1550 printf_filtered ("%c", d
->format
.size
);
1551 printf_filtered (" ");
1553 annotate_display_expression ();
1555 print_expression (d
->exp
, gdb_stdout
);
1556 annotate_display_expression_end ();
1558 if (d
->format
.count
!= 1)
1559 printf_filtered ("\n");
1561 printf_filtered (" ");
1563 val
= evaluate_expression (d
->exp
);
1564 addr
= value_as_address (val
);
1565 if (d
->format
.format
== 'i')
1566 addr
= ADDR_BITS_REMOVE (addr
);
1568 annotate_display_value ();
1570 do_examine (d
->format
, addr
, VALUE_BFD_SECTION (val
));
1574 annotate_display_format ();
1576 if (d
->format
.format
)
1577 printf_filtered ("/%c ", d
->format
.format
);
1579 annotate_display_expression ();
1581 print_expression (d
->exp
, gdb_stdout
);
1582 annotate_display_expression_end ();
1584 printf_filtered (" = ");
1586 annotate_display_expression ();
1588 print_formatted (evaluate_expression (d
->exp
),
1589 d
->format
.format
, d
->format
.size
, gdb_stdout
);
1590 printf_filtered ("\n");
1593 annotate_display_end ();
1595 gdb_flush (gdb_stdout
);
1596 current_display_number
= -1;
1599 /* Display all of the values on the auto-display chain which can be
1600 evaluated in the current scope. */
1605 register struct display
*d
;
1607 for (d
= display_chain
; d
; d
= d
->next
)
1611 /* Delete the auto-display which we were in the process of displaying.
1612 This is done when there is an error or a signal. */
1615 disable_display (int num
)
1617 register struct display
*d
;
1619 for (d
= display_chain
; d
; d
= d
->next
)
1620 if (d
->number
== num
)
1625 printf_unfiltered ("No display number %d.\n", num
);
1629 disable_current_display (void)
1631 if (current_display_number
>= 0)
1633 disable_display (current_display_number
);
1634 fprintf_unfiltered (gdb_stderr
, "Disabling display %d to avoid infinite recursion.\n",
1635 current_display_number
);
1637 current_display_number
= -1;
1641 display_info (char *ignore
, int from_tty
)
1643 register struct display
*d
;
1646 printf_unfiltered ("There are no auto-display expressions now.\n");
1648 printf_filtered ("Auto-display expressions now in effect:\n\
1649 Num Enb Expression\n");
1651 for (d
= display_chain
; d
; d
= d
->next
)
1653 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1655 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1657 else if (d
->format
.format
)
1658 printf_filtered ("/%c ", d
->format
.format
);
1659 print_expression (d
->exp
, gdb_stdout
);
1660 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1661 printf_filtered (" (cannot be evaluated in the current context)");
1662 printf_filtered ("\n");
1663 gdb_flush (gdb_stdout
);
1668 enable_display (char *args
, int from_tty
)
1670 register char *p
= args
;
1673 register struct display
*d
;
1677 for (d
= display_chain
; d
; d
= d
->next
)
1684 while (*p1
>= '0' && *p1
<= '9')
1686 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1687 error ("Arguments must be display numbers.");
1691 for (d
= display_chain
; d
; d
= d
->next
)
1692 if (d
->number
== num
)
1697 printf_unfiltered ("No display number %d.\n", num
);
1700 while (*p
== ' ' || *p
== '\t')
1707 disable_display_command (char *args
, int from_tty
)
1709 register char *p
= args
;
1711 register struct display
*d
;
1715 for (d
= display_chain
; d
; d
= d
->next
)
1722 while (*p1
>= '0' && *p1
<= '9')
1724 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1725 error ("Arguments must be display numbers.");
1727 disable_display (atoi (p
));
1730 while (*p
== ' ' || *p
== '\t')
1736 /* Print the value in stack frame FRAME of a variable
1737 specified by a struct symbol. */
1740 print_variable_value (struct symbol
*var
, struct frame_info
*frame
,
1741 struct ui_file
*stream
)
1743 struct value
*val
= read_var_value (var
, frame
);
1745 value_print (val
, stream
, 0, Val_pretty_default
);
1748 /* Print the arguments of a stack frame, given the function FUNC
1749 running in that frame (as a symbol), the info on the frame,
1750 and the number of args according to the stack frame (or -1 if unknown). */
1752 /* References here and elsewhere to "number of args according to the
1753 stack frame" appear in all cases to refer to "number of ints of args
1754 according to the stack frame". At least for VAX, i386, isi. */
1757 print_frame_args (struct symbol
*func
, struct frame_info
*fi
, int num
,
1758 struct ui_file
*stream
)
1760 struct block
*b
= NULL
;
1763 register struct symbol
*sym
;
1765 /* Offset of next stack argument beyond the one we have seen that is
1766 at the highest offset.
1767 -1 if we haven't come to a stack argument yet. */
1768 long highest_offset
= -1;
1770 /* Number of ints of arguments that we have printed so far. */
1771 int args_printed
= 0;
1772 struct cleanup
*old_chain
, *list_chain
;
1773 struct ui_stream
*stb
;
1775 stb
= ui_out_stream_new (uiout
);
1776 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1780 b
= SYMBOL_BLOCK_VALUE (func
);
1781 /* Function blocks are order sensitive, and thus should not be
1783 gdb_assert (BLOCK_HASHTABLE (b
) == 0);
1785 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1789 /* Keep track of the highest stack argument offset seen, and
1790 skip over any kinds of symbols we don't care about. */
1792 switch (SYMBOL_CLASS (sym
))
1797 long current_offset
= SYMBOL_VALUE (sym
);
1798 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1800 /* Compute address of next argument by adding the size of
1801 this argument and rounding to an int boundary. */
1803 ((current_offset
+ arg_size
+ sizeof (int) - 1)
1804 & ~(sizeof (int) - 1));
1806 /* If this is the highest offset seen yet, set highest_offset. */
1807 if (highest_offset
== -1
1808 || (current_offset
> highest_offset
))
1809 highest_offset
= current_offset
;
1811 /* Add the number of ints we're about to print to args_printed. */
1812 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1815 /* We care about types of symbols, but don't need to keep track of
1816 stack offsets in them. */
1818 case LOC_REGPARM_ADDR
:
1820 case LOC_BASEREG_ARG
:
1821 case LOC_COMPUTED_ARG
:
1824 /* Other types of symbols we just skip over. */
1829 /* We have to look up the symbol because arguments can have
1830 two entries (one a parameter, one a local) and the one we
1831 want is the local, which lookup_symbol will find for us.
1832 This includes gcc1 (not gcc2) on the sparc when passing a
1833 small structure and gcc2 when the argument type is float
1834 and it is passed as a double and converted to float by
1835 the prologue (in the latter case the type of the LOC_ARG
1836 symbol is double and the type of the LOC_LOCAL symbol is
1838 /* But if the parameter name is null, don't try it.
1839 Null parameter names occur on the RS/6000, for traceback tables.
1840 FIXME, should we even print them? */
1842 if (*DEPRECATED_SYMBOL_NAME (sym
))
1844 struct symbol
*nsym
;
1845 nsym
= lookup_symbol
1846 (DEPRECATED_SYMBOL_NAME (sym
),
1847 b
, VAR_DOMAIN
, (int *) NULL
, (struct symtab
**) NULL
);
1848 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
1850 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
1851 it was passed on the stack and loaded into a register,
1852 or passed in a register and stored in a stack slot.
1853 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
1855 Reasons for using the LOC_ARG:
1856 (1) because find_saved_registers may be slow for remote
1858 (2) because registers are often re-used and stack slots
1859 rarely (never?) are. Therefore using the stack slot is
1860 much less likely to print garbage.
1862 Reasons why we might want to use the LOC_REGISTER:
1863 (1) So that the backtrace prints the same value as
1864 "print foo". I see no compelling reason why this needs
1865 to be the case; having the backtrace print the value which
1866 was passed in, and "print foo" print the value as modified
1867 within the called function, makes perfect sense to me.
1869 Additional note: It might be nice if "info args" displayed
1871 One more note: There is a case with sparc structure passing
1872 where we need to use the LOC_REGISTER, but this is dealt with
1873 by creating a single LOC_REGPARM in symbol reading. */
1875 /* Leave sym (the LOC_ARG) alone. */
1882 /* Print the current arg. */
1884 ui_out_text (uiout
, ", ");
1885 ui_out_wrap_hint (uiout
, " ");
1887 annotate_arg_begin ();
1889 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
1890 fprintf_symbol_filtered (stb
->stream
, SYMBOL_PRINT_NAME (sym
),
1891 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1892 ui_out_field_stream (uiout
, "name", stb
);
1893 annotate_arg_name_end ();
1894 ui_out_text (uiout
, "=");
1896 /* Avoid value_print because it will deref ref parameters. We just
1897 want to print their addresses. Print ??? for args whose address
1898 we do not know. We pass 2 as "recurse" to val_print because our
1899 standard indentation here is 4 spaces, and val_print indents
1900 2 for each recurse. */
1901 val
= read_var_value (sym
, fi
);
1903 annotate_arg_value (val
== NULL
? NULL
: VALUE_TYPE (val
));
1907 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
1908 VALUE_ADDRESS (val
),
1909 stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
1910 ui_out_field_stream (uiout
, "value", stb
);
1913 ui_out_text (uiout
, "???");
1915 /* Invoke ui_out_tuple_end. */
1916 do_cleanups (list_chain
);
1918 annotate_arg_end ();
1924 /* Don't print nameless args in situations where we don't know
1925 enough about the stack to find them. */
1930 if (highest_offset
== -1)
1931 start
= FRAME_ARGS_SKIP
;
1933 start
= highest_offset
;
1935 print_frame_nameless_args (fi
, start
, num
- args_printed
,
1938 do_cleanups (old_chain
);
1941 /* Print nameless args on STREAM.
1942 FI is the frameinfo for this frame, START is the offset
1943 of the first nameless arg, and NUM is the number of nameless args to
1944 print. FIRST is nonzero if this is the first argument (not just
1945 the first nameless arg). */
1948 print_frame_nameless_args (struct frame_info
*fi
, long start
, int num
,
1949 int first
, struct ui_file
*stream
)
1955 for (i
= 0; i
< num
; i
++)
1958 argsaddr
= get_frame_args_address (fi
);
1961 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
1963 fprintf_filtered (stream
, ", ");
1964 fprintf_filtered (stream
, "%ld", arg_value
);
1966 start
+= sizeof (int);
1972 printf_command (char *arg
, int from_tty
)
1974 register char *f
= NULL
;
1975 register char *s
= arg
;
1976 char *string
= NULL
;
1977 struct value
**val_args
;
1979 char *current_substring
;
1981 int allocated_args
= 20;
1982 struct cleanup
*old_cleanups
;
1984 val_args
= (struct value
**) xmalloc (allocated_args
1985 * sizeof (struct value
*));
1986 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
1989 error_no_arg ("format-control string and values to print");
1991 /* Skip white space before format string */
1992 while (*s
== ' ' || *s
== '\t')
1995 /* A format string should follow, enveloped in double quotes */
1997 error ("Bad format string, missing '\"'.");
1999 /* Parse the format-control string and copy it into the string STRING,
2000 processing some kinds of escape sequence. */
2002 f
= string
= (char *) alloca (strlen (s
) + 1);
2010 error ("Bad format string, non-terminated '\"'.");
2043 /* ??? TODO: handle other escape sequences */
2044 error ("Unrecognized escape character \\%c in format string.",
2054 /* Skip over " and following space and comma. */
2057 while (*s
== ' ' || *s
== '\t')
2060 if (*s
!= ',' && *s
!= 0)
2061 error ("Invalid argument syntax");
2065 while (*s
== ' ' || *s
== '\t')
2068 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2069 substrings
= alloca (strlen (string
) * 2);
2070 current_substring
= substrings
;
2073 /* Now scan the string for %-specs and see what kinds of args they want.
2074 argclass[I] classifies the %-specs so we can give printf_filtered
2075 something of the right size. */
2079 no_arg
, int_arg
, string_arg
, double_arg
, long_long_arg
2081 enum argclass
*argclass
;
2082 enum argclass this_argclass
;
2088 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2096 while (strchr ("0123456789.hlL-+ #", *f
))
2098 if (*f
== 'l' || *f
== 'L')
2105 this_argclass
= string_arg
;
2111 this_argclass
= double_arg
;
2115 error ("`*' not supported for precision or width in printf");
2118 error ("Format specifier `n' not supported in printf");
2121 this_argclass
= no_arg
;
2126 this_argclass
= long_long_arg
;
2128 this_argclass
= int_arg
;
2132 if (this_argclass
!= no_arg
)
2134 strncpy (current_substring
, last_arg
, f
- last_arg
);
2135 current_substring
+= f
- last_arg
;
2136 *current_substring
++ = '\0';
2138 argclass
[nargs_wanted
++] = this_argclass
;
2142 /* Now, parse all arguments and evaluate them.
2143 Store the VALUEs in VAL_ARGS. */
2148 if (nargs
== allocated_args
)
2149 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2150 (allocated_args
*= 2)
2151 * sizeof (struct value
*));
2153 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2155 /* If format string wants a float, unchecked-convert the value to
2156 floating point of the same size */
2158 if (argclass
[nargs
] == double_arg
)
2160 struct type
*type
= VALUE_TYPE (val_args
[nargs
]);
2161 if (TYPE_LENGTH (type
) == sizeof (float))
2162 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
2163 if (TYPE_LENGTH (type
) == sizeof (double))
2164 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
2172 if (nargs
!= nargs_wanted
)
2173 error ("Wrong number of arguments for specified format-string");
2175 /* Now actually print them. */
2176 current_substring
= substrings
;
2177 for (i
= 0; i
< nargs
; i
++)
2179 switch (argclass
[i
])
2186 tem
= value_as_address (val_args
[i
]);
2188 /* This is a %s argument. Find the length of the string. */
2193 read_memory (tem
+ j
, &c
, 1);
2198 /* Copy the string contents into a string inside GDB. */
2199 str
= (char *) alloca (j
+ 1);
2201 read_memory (tem
, str
, j
);
2204 printf_filtered (current_substring
, str
);
2209 double val
= value_as_double (val_args
[i
]);
2210 printf_filtered (current_substring
, val
);
2214 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2216 long long val
= value_as_long (val_args
[i
]);
2217 printf_filtered (current_substring
, val
);
2221 error ("long long not supported in printf");
2225 /* FIXME: there should be separate int_arg and long_arg. */
2226 long val
= value_as_long (val_args
[i
]);
2227 printf_filtered (current_substring
, val
);
2230 default: /* purecov: deadcode */
2231 error ("internal error in printf_command"); /* purecov: deadcode */
2233 /* Skip to the next substring. */
2234 current_substring
+= strlen (current_substring
) + 1;
2236 /* Print the portion of the format string after the last argument. */
2237 printf_filtered (last_arg
);
2239 do_cleanups (old_cleanups
);
2243 _initialize_printcmd (void)
2245 struct cmd_list_element
*c
;
2247 current_display_number
= -1;
2249 add_info ("address", address_info
,
2250 "Describe where symbol SYM is stored.");
2252 add_info ("symbol", sym_info
,
2253 "Describe what symbol is at location ADDR.\n\
2254 Only for symbols with fixed locations (global or static scope).");
2256 add_com ("x", class_vars
, x_command
,
2257 concat ("Examine memory: x/FMT ADDRESS.\n\
2258 ADDRESS is an expression for the memory address to examine.\n\
2259 FMT is a repeat count followed by a format letter and a size letter.\n\
2260 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2261 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2262 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2263 The specified number of objects of the specified size are printed\n\
2264 according to the format.\n\n\
2265 Defaults for format and size letters are those previously used.\n\
2266 Default count is 1. Default address is following last thing printed\n\
2267 with this command or \"print\".", NULL
));
2270 add_com ("whereis", class_vars
, whereis_command
,
2271 "Print line number and file of definition of variable.");
2274 add_info ("display", display_info
,
2275 "Expressions to display when program stops, with code numbers.");
2277 add_cmd ("undisplay", class_vars
, undisplay_command
,
2278 "Cancel some expressions to be displayed when program stops.\n\
2279 Arguments are the code numbers of the expressions to stop displaying.\n\
2280 No argument means cancel all automatic-display expressions.\n\
2281 \"delete display\" has the same effect as this command.\n\
2282 Do \"info display\" to see current list of code numbers.",
2285 add_com ("display", class_vars
, display_command
,
2286 "Print value of expression EXP each time the program stops.\n\
2287 /FMT may be used before EXP as in the \"print\" command.\n\
2288 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2289 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2290 and examining is done as in the \"x\" command.\n\n\
2291 With no argument, display all currently requested auto-display expressions.\n\
2292 Use \"undisplay\" to cancel display requests previously made."
2295 add_cmd ("display", class_vars
, enable_display
,
2296 "Enable some expressions to be displayed when program stops.\n\
2297 Arguments are the code numbers of the expressions to resume displaying.\n\
2298 No argument means enable all automatic-display expressions.\n\
2299 Do \"info display\" to see current list of code numbers.", &enablelist
);
2301 add_cmd ("display", class_vars
, disable_display_command
,
2302 "Disable some expressions to be displayed when program stops.\n\
2303 Arguments are the code numbers of the expressions to stop displaying.\n\
2304 No argument means disable all automatic-display expressions.\n\
2305 Do \"info display\" to see current list of code numbers.", &disablelist
);
2307 add_cmd ("display", class_vars
, undisplay_command
,
2308 "Cancel some expressions to be displayed when program stops.\n\
2309 Arguments are the code numbers of the expressions to stop displaying.\n\
2310 No argument means cancel all automatic-display expressions.\n\
2311 Do \"info display\" to see current list of code numbers.", &deletelist
);
2313 add_com ("printf", class_vars
, printf_command
,
2314 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2315 This is useful for formatted output in user-defined commands.");
2317 add_com ("output", class_vars
, output_command
,
2318 "Like \"print\" but don't put in value history and don't print newline.\n\
2319 This is useful in user-defined commands.");
2321 add_prefix_cmd ("set", class_vars
, set_command
,
2322 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2323 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2324 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2325 with $), a register (a few standard names starting with $), or an actual\n\
2326 variable in the program being debugged. EXP is any valid expression.\n",
2327 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2328 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2329 You can see these environment settings with the \"show\" command.", NULL
),
2330 &setlist
, "set ", 1, &cmdlist
);
2332 add_com ("assign", class_vars
, set_command
, concat ("Evaluate expression \
2333 EXP and assign result to variable VAR, using assignment\n\
2334 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2335 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2336 with $), a register (a few standard names starting with $), or an actual\n\
2337 variable in the program being debugged. EXP is any valid expression.\n",
2338 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2339 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2340 You can see these environment settings with the \"show\" command.", NULL
));
2342 /* "call" is the same as "set", but handy for dbx users to call fns. */
2343 c
= add_com ("call", class_vars
, call_command
,
2344 "Call a function in the program.\n\
2345 The argument is the function name and arguments, in the notation of the\n\
2346 current working language. The result is printed and saved in the value\n\
2347 history, if it is not void.");
2348 set_cmd_completer (c
, location_completer
);
2350 add_cmd ("variable", class_vars
, set_command
,
2351 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2352 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2353 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2354 with $), a register (a few standard names starting with $), or an actual\n\
2355 variable in the program being debugged. EXP is any valid expression.\n\
2356 This may usually be abbreviated to simply \"set\".",
2359 c
= add_com ("print", class_vars
, print_command
,
2360 concat ("Print value of expression EXP.\n\
2361 Variables accessible are those of the lexical environment of the selected\n\
2362 stack frame, plus all those whose scope is global or an entire file.\n\
2364 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2365 $$NUM refers to NUM'th value back from the last one.\n\
2366 Names starting with $ refer to registers (with the values they would have\n",
2367 "if the program were to return to the stack frame now selected, restoring\n\
2368 all registers saved by frames farther in) or else to debugger\n\
2369 \"convenience\" variables (any such name not a known register).\n\
2370 Use assignment expressions to give values to convenience variables.\n",
2372 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2373 @ is a binary operator for treating consecutive data objects\n\
2374 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2375 element is FOO, whose second element is stored in the space following\n\
2376 where FOO is stored, etc. FOO must be an expression whose value\n\
2377 resides in memory.\n",
2379 EXP may be preceded with /FMT, where FMT is a format letter\n\
2380 but no count or size letter (see \"x\" command).", NULL
));
2381 set_cmd_completer (c
, location_completer
);
2382 add_com_alias ("p", "print", class_vars
, 1);
2384 c
= add_com ("inspect", class_vars
, inspect_command
,
2385 "Same as \"print\" command, except that if you are running in the epoch\n\
2386 environment, the value is printed in its own window.");
2387 set_cmd_completer (c
, location_completer
);
2390 add_set_cmd ("max-symbolic-offset", no_class
, var_uinteger
,
2391 (char *) &max_symbolic_offset
,
2392 "Set the largest offset that will be printed in <symbol+1234> form.",
2396 add_set_cmd ("symbol-filename", no_class
, var_boolean
,
2397 (char *) &print_symbol_filename
,
2398 "Set printing of source filename and line number with <symbol>.",
2402 /* For examine/instruction a single byte quantity is specified as
2403 the data. This avoids problems with value_at_lazy() requiring a
2404 valid data type (and rejecting VOID). */
2405 examine_i_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_i_type", NULL
);
2407 examine_b_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_b_type", NULL
);
2408 examine_h_type
= init_type (TYPE_CODE_INT
, 2, 0, "examine_h_type", NULL
);
2409 examine_w_type
= init_type (TYPE_CODE_INT
, 4, 0, "examine_w_type", NULL
);
2410 examine_g_type
= init_type (TYPE_CODE_INT
, 8, 0, "examine_g_type", NULL
);