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 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"
46 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
47 extern int addressprint
; /* Whether to print hex addresses in HLL " */
56 /* Last specified output format. */
58 static char last_format
= 'x';
60 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
62 static char last_size
= 'w';
64 /* Default address to examine next. */
66 static CORE_ADDR next_address
;
68 /* Default section to examine next. */
70 static asection
*next_section
;
72 /* Last address examined. */
74 static CORE_ADDR last_examine_address
;
76 /* Contents of last address examined.
77 This is not valid past the end of the `x' command! */
79 static struct value
*last_examine_value
;
81 /* Largest offset between a symbolic value and an address, that will be
82 printed as `0x1234 <symbol+offset>'. */
84 static unsigned int max_symbolic_offset
= UINT_MAX
;
86 /* Append the source filename and linenumber of the symbol when
87 printing a symbolic value as `<symbol at filename:linenum>' if set. */
88 static int print_symbol_filename
= 0;
90 /* Number of auto-display expression currently being displayed.
91 So that we can disable it if we get an error or a signal within it.
92 -1 when not doing one. */
94 int current_display_number
;
96 /* Flag to low-level print routines that this value is being printed
97 in an epoch window. We'd like to pass this as a parameter, but
98 every routine would need to take it. Perhaps we can encapsulate
99 this in the I/O stream once we have GNU stdio. */
105 /* Chain link to next auto-display item. */
106 struct display
*next
;
107 /* Expression to be evaluated and displayed. */
108 struct expression
*exp
;
109 /* Item number of this auto-display item. */
111 /* Display format specified. */
112 struct format_data format
;
113 /* Innermost block required by this expression when evaluated */
115 /* Status of this display (enabled or disabled) */
119 /* Chain of expressions whose values should be displayed
120 automatically each time the program stops. */
122 static struct display
*display_chain
;
124 static int display_number
;
126 /* Prototypes for exported functions. */
128 void output_command (char *, int);
130 void _initialize_printcmd (void);
132 /* Prototypes for local functions. */
134 static void delete_display (int);
136 static void enable_display (char *, int);
138 static void disable_display_command (char *, int);
140 static void printf_command (char *, int);
142 static void print_frame_nameless_args (struct frame_info
*, long,
143 int, int, struct ui_file
*);
145 static void display_info (char *, int);
147 static void do_one_display (struct display
*);
149 static void undisplay_command (char *, int);
151 static void free_display (struct display
*);
153 static void display_command (char *, int);
155 void x_command (char *, int);
157 static void address_info (char *, int);
159 static void set_command (char *, int);
161 static void call_command (char *, int);
163 static void inspect_command (char *, int);
165 static void print_command (char *, int);
167 static void print_command_1 (char *, int, int);
169 static void validate_format (struct format_data
, char *);
171 static void do_examine (struct format_data
, CORE_ADDR addr
,
174 static void print_formatted (struct value
*, int, int, struct ui_file
*);
176 static struct format_data
decode_format (char **, int, int);
178 static int print_insn (CORE_ADDR
, struct ui_file
*);
180 static void sym_info (char *, int);
183 /* Decode a format specification. *STRING_PTR should point to it.
184 OFORMAT and OSIZE are used as defaults for the format and size
185 if none are given in the format specification.
186 If OSIZE is zero, then the size field of the returned value
187 should be set only if a size is explicitly specified by the
189 The structure returned describes all the data
190 found in the specification. In addition, *STRING_PTR is advanced
191 past the specification and past all whitespace following it. */
193 static struct format_data
194 decode_format (char **string_ptr
, int oformat
, int osize
)
196 struct format_data val
;
197 register char *p
= *string_ptr
;
203 if (*p
>= '0' && *p
<= '9')
204 val
.count
= atoi (p
);
205 while (*p
>= '0' && *p
<= '9')
208 /* Now process size or format letters that follow. */
212 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
214 else if (*p
>= 'a' && *p
<= 'z')
220 while (*p
== ' ' || *p
== '\t')
224 /* Set defaults for format and size if not specified. */
225 if (val
.format
== '?')
229 /* Neither has been specified. */
230 val
.format
= oformat
;
234 /* If a size is specified, any format makes a reasonable
235 default except 'i'. */
236 val
.format
= oformat
== 'i' ? 'x' : oformat
;
238 else if (val
.size
== '?')
243 /* Pick the appropriate size for an address. */
244 if (TARGET_PTR_BIT
== 64)
245 val
.size
= osize
? 'g' : osize
;
246 else if (TARGET_PTR_BIT
== 32)
247 val
.size
= osize
? 'w' : osize
;
248 else if (TARGET_PTR_BIT
== 16)
249 val
.size
= osize
? 'h' : osize
;
251 /* Bad value for TARGET_PTR_BIT */
252 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
255 /* Floating point has to be word or giantword. */
256 if (osize
== 'w' || osize
== 'g')
259 /* Default it to giantword if the last used size is not
261 val
.size
= osize
? 'g' : osize
;
264 /* Characters default to one byte. */
265 val
.size
= osize
? 'b' : osize
;
268 /* The default is the size most recently specified. */
275 /* Print value VAL on stream according to FORMAT, a letter or 0.
276 Do not end with a newline.
277 0 means print VAL according to its own type.
278 SIZE is the letter for the size of datum being printed.
279 This is used to pad hex numbers so they line up. */
282 print_formatted (struct value
*val
, register int format
, int size
,
283 struct ui_file
*stream
)
285 struct type
*type
= check_typedef (VALUE_TYPE (val
));
286 int len
= TYPE_LENGTH (type
);
288 if (VALUE_LVAL (val
) == lval_memory
)
290 next_address
= VALUE_ADDRESS (val
) + len
;
291 next_section
= VALUE_BFD_SECTION (val
);
297 /* FIXME: Need to handle wchar_t's here... */
298 next_address
= VALUE_ADDRESS (val
)
299 + val_print_string (VALUE_ADDRESS (val
), -1, 1, stream
);
300 next_section
= VALUE_BFD_SECTION (val
);
304 /* The old comment says
305 "Force output out, print_insn not using _filtered".
306 I'm not completely sure what that means, I suspect most print_insn
307 now do use _filtered, so I guess it's obsolete.
308 --Yes, it does filter now, and so this is obsolete. -JB */
310 /* We often wrap here if there are long symbolic names. */
312 next_address
= VALUE_ADDRESS (val
)
313 + print_insn (VALUE_ADDRESS (val
), stream
);
314 next_section
= VALUE_BFD_SECTION (val
);
319 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
320 || TYPE_CODE (type
) == TYPE_CODE_STRING
321 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
322 || TYPE_CODE (type
) == TYPE_CODE_UNION
)
323 /* If format is 0, use the 'natural' format for
324 * that type of value. If the type is non-scalar,
325 * we have to use language rules to print it as
326 * a series of scalars.
328 value_print (val
, stream
, format
, Val_pretty_default
);
330 /* User specified format, so don't look to the
331 * the type to tell us what to do.
333 print_scalar_formatted (VALUE_CONTENTS (val
), type
,
334 format
, size
, stream
);
338 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
339 according to letters FORMAT and SIZE on STREAM.
340 FORMAT may not be zero. Formats s and i are not supported at this level.
342 This is how the elements of an array or structure are printed
346 print_scalar_formatted (char *valaddr
, struct type
*type
, int format
, int size
,
347 struct ui_file
*stream
)
350 unsigned int len
= TYPE_LENGTH (type
);
352 if (len
> sizeof (LONGEST
)
360 if (!TYPE_UNSIGNED (type
)
361 || !extract_long_unsigned_integer (valaddr
, len
, &val_long
))
363 /* We can't print it normally, but we can print it in hex.
364 Printing it in the wrong radix is more useful than saying
365 "use /x, you dummy". */
366 /* FIXME: we could also do octal or binary if that was the
368 /* FIXME: we should be using the size field to give us a
369 minimum field width to print. */
372 print_octal_chars (stream
, valaddr
, len
);
373 else if (format
== 'd')
374 print_decimal_chars (stream
, valaddr
, len
);
375 else if (format
== 't')
376 print_binary_chars (stream
, valaddr
, len
);
378 /* replace with call to print_hex_chars? Looks
379 like val_print_type_code_int is redoing
382 val_print_type_code_int (type
, valaddr
, stream
);
387 /* If we get here, extract_long_unsigned_integer set val_long. */
389 else if (format
!= 'f')
390 val_long
= unpack_long (type
, valaddr
);
392 /* If the value is a pointer, and pointers and addresses are not the
393 same, then at this point, the value's length (in target bytes) is
394 TARGET_ADDR_BIT/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
395 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
396 len
= TARGET_ADDR_BIT
/ TARGET_CHAR_BIT
;
398 /* If we are printing it as unsigned, truncate it in case it is actually
399 a negative signed value (e.g. "print/u (short)-1" should print 65535
400 (if shorts are 16 bits) instead of 4294967295). */
403 if (len
< sizeof (LONGEST
))
404 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
412 /* no size specified, like in print. Print varying # of digits. */
413 print_longest (stream
, 'x', 1, val_long
);
422 print_longest (stream
, size
, 1, val_long
);
425 error ("Undefined output size \"%c\".", size
);
430 print_longest (stream
, 'd', 1, val_long
);
434 print_longest (stream
, 'u', 0, val_long
);
439 print_longest (stream
, 'o', 1, val_long
);
441 fprintf_filtered (stream
, "0");
446 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
447 print_address (addr
, stream
);
452 value_print (value_from_longest (builtin_type_true_char
, val_long
),
453 stream
, 0, Val_pretty_default
);
457 if (len
== TYPE_LENGTH (builtin_type_float
))
458 type
= builtin_type_float
;
459 else if (len
== TYPE_LENGTH (builtin_type_double
))
460 type
= builtin_type_double
;
461 else if (len
== TYPE_LENGTH (builtin_type_long_double
))
462 type
= builtin_type_long_double
;
463 print_floating (valaddr
, type
, stream
);
467 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
470 /* Binary; 't' stands for "two". */
472 char bits
[8 * (sizeof val_long
) + 1];
473 char buf
[8 * (sizeof val_long
) + 32];
478 width
= 8 * (sizeof val_long
);
495 error ("Undefined output size \"%c\".", size
);
501 bits
[width
] = (val_long
& 1) ? '1' : '0';
506 while (*cp
&& *cp
== '0')
511 strcpy (buf
, local_binary_format_prefix ());
513 strcat (buf
, local_binary_format_suffix ());
514 fprintf_filtered (stream
, buf
);
519 error ("Undefined output format \"%c\".", format
);
523 /* Specify default address for `x' command.
524 `info lines' uses this. */
527 set_next_address (CORE_ADDR addr
)
531 /* Make address available to the user as $_. */
532 set_internalvar (lookup_internalvar ("_"),
533 value_from_pointer (lookup_pointer_type (builtin_type_void
),
537 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
538 after LEADIN. Print nothing if no symbolic name is found nearby.
539 Optionally also print source file and line number, if available.
540 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
541 or to interpret it as a possible C++ name and convert it back to source
542 form. However note that DO_DEMANGLE can be overridden by the specific
543 settings of the demangle and asm_demangle variables. */
546 print_address_symbolic (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
,
550 char *filename
= NULL
;
555 /* throw away both name and filename */
556 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
557 make_cleanup (free_current_contents
, &filename
);
559 if (build_address_symbolic (addr
, do_demangle
, &name
, &offset
, &filename
, &line
, &unmapped
))
561 do_cleanups (cleanup_chain
);
565 fputs_filtered (leadin
, stream
);
567 fputs_filtered ("<*", stream
);
569 fputs_filtered ("<", stream
);
570 fputs_filtered (name
, stream
);
572 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
574 /* Append source filename and line number if desired. Give specific
575 line # of this addr, if we have it; else line # of the nearest symbol. */
576 if (print_symbol_filename
&& filename
!= NULL
)
579 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
581 fprintf_filtered (stream
, " in %s", filename
);
584 fputs_filtered ("*>", stream
);
586 fputs_filtered (">", stream
);
588 do_cleanups (cleanup_chain
);
591 /* Given an address ADDR return all the elements needed to print the
592 address in a symbolic form. NAME can be mangled or not depending
593 on DO_DEMANGLE (and also on the asm_demangle global variable,
594 manipulated via ''set print asm-demangle''). Return 0 in case of
595 success, when all the info in the OUT paramters is valid. Return 1
598 build_address_symbolic (CORE_ADDR addr
, /* IN */
599 int do_demangle
, /* IN */
600 char **name
, /* OUT */
601 int *offset
, /* OUT */
602 char **filename
, /* OUT */
604 int *unmapped
) /* OUT */
606 struct minimal_symbol
*msymbol
;
607 struct symbol
*symbol
;
608 struct symtab
*symtab
= 0;
609 CORE_ADDR name_location
= 0;
610 asection
*section
= 0;
611 char *name_temp
= "";
613 /* Let's say it is unmapped. */
616 /* Determine if the address is in an overlay, and whether it is
618 if (overlay_debugging
)
620 section
= find_pc_overlay (addr
);
621 if (pc_in_unmapped_range (addr
, section
))
624 addr
= overlay_mapped_address (addr
, section
);
628 /* On some targets, add in extra "flag" bits to PC for
629 disassembly. This should ensure that "rounding errors" in
630 symbol addresses that are masked for disassembly favour the
631 the correct symbol. */
633 #ifdef GDB_TARGET_UNMASK_DISAS_PC
634 addr
= GDB_TARGET_UNMASK_DISAS_PC (addr
);
637 /* First try to find the address in the symbol table, then
638 in the minsyms. Take the closest one. */
640 /* This is defective in the sense that it only finds text symbols. So
641 really this is kind of pointless--we should make sure that the
642 minimal symbols have everything we need (by changing that we could
643 save some memory, but for many debug format--ELF/DWARF or
644 anything/stabs--it would be inconvenient to eliminate those minimal
646 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
647 symbol
= find_pc_sect_function (addr
, section
);
651 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
653 name_temp
= SYMBOL_SOURCE_NAME (symbol
);
655 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
660 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
662 /* The msymbol is closer to the address than the symbol;
663 use the msymbol instead. */
666 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
668 name_temp
= SYMBOL_SOURCE_NAME (msymbol
);
670 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
673 if (symbol
== NULL
&& msymbol
== NULL
)
676 /* On some targets, mask out extra "flag" bits from PC for handsome
679 #ifdef GDB_TARGET_MASK_DISAS_PC
680 name_location
= GDB_TARGET_MASK_DISAS_PC (name_location
);
681 addr
= GDB_TARGET_MASK_DISAS_PC (addr
);
684 /* If the nearest symbol is too far away, don't print anything symbolic. */
686 /* For when CORE_ADDR is larger than unsigned int, we do math in
687 CORE_ADDR. But when we detect unsigned wraparound in the
688 CORE_ADDR math, we ignore this test and print the offset,
689 because addr+max_symbolic_offset has wrapped through the end
690 of the address space back to the beginning, giving bogus comparison. */
691 if (addr
> name_location
+ max_symbolic_offset
692 && name_location
+ max_symbolic_offset
> name_location
)
695 *offset
= addr
- name_location
;
697 *name
= xstrdup (name_temp
);
699 if (print_symbol_filename
)
701 struct symtab_and_line sal
;
703 sal
= find_pc_sect_line (addr
, section
, 0);
707 *filename
= xstrdup (sal
.symtab
->filename
);
710 else if (symtab
&& symbol
&& symbol
->line
)
712 *filename
= xstrdup (symtab
->filename
);
713 *line
= symbol
->line
;
717 *filename
= xstrdup (symtab
->filename
);
724 /* Print address ADDR on STREAM. USE_LOCAL means the same thing as for
727 print_address_numeric (CORE_ADDR addr
, int use_local
, struct ui_file
*stream
)
729 /* Truncate address to the size of a target address, avoiding shifts
730 larger or equal than the width of a CORE_ADDR. The local
731 variable ADDR_BIT stops the compiler reporting a shift overflow
732 when it won't occur. */
733 /* NOTE: This assumes that the significant address information is
734 kept in the least significant bits of ADDR - the upper bits were
735 either zero or sign extended. Should ADDRESS_TO_POINTER() or
736 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
738 int addr_bit
= TARGET_ADDR_BIT
;
740 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
741 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
742 print_longest (stream
, 'x', use_local
, (ULONGEST
) addr
);
745 /* Print address ADDR symbolically on STREAM.
746 First print it as a number. Then perhaps print
747 <SYMBOL + OFFSET> after the number. */
750 print_address (CORE_ADDR addr
, struct ui_file
*stream
)
752 print_address_numeric (addr
, 1, stream
);
753 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
756 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
757 controls whether to print the symbolic name "raw" or demangled.
758 Global setting "addressprint" controls whether to print hex address
762 print_address_demangle (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
)
766 fprintf_filtered (stream
, "0");
768 else if (addressprint
)
770 print_address_numeric (addr
, 1, stream
);
771 print_address_symbolic (addr
, stream
, do_demangle
, " ");
775 print_address_symbolic (addr
, stream
, do_demangle
, "");
780 /* These are the types that $__ will get after an examine command of one
783 static struct type
*examine_i_type
;
785 static struct type
*examine_b_type
;
786 static struct type
*examine_h_type
;
787 static struct type
*examine_w_type
;
788 static struct type
*examine_g_type
;
790 /* Examine data at address ADDR in format FMT.
791 Fetch it from memory and print on gdb_stdout. */
794 do_examine (struct format_data fmt
, CORE_ADDR addr
, asection
*sect
)
796 register char format
= 0;
798 register int count
= 1;
799 struct type
*val_type
= NULL
;
801 register int maxelts
;
809 /* String or instruction format implies fetch single bytes
810 regardless of the specified size. */
811 if (format
== 's' || format
== 'i')
815 val_type
= examine_i_type
;
816 else if (size
== 'b')
817 val_type
= examine_b_type
;
818 else if (size
== 'h')
819 val_type
= examine_h_type
;
820 else if (size
== 'w')
821 val_type
= examine_w_type
;
822 else if (size
== 'g')
823 val_type
= examine_g_type
;
830 if (format
== 's' || format
== 'i')
833 /* Print as many objects as specified in COUNT, at most maxelts per line,
834 with the address of the next one at the start of each line. */
839 print_address (next_address
, gdb_stdout
);
840 printf_filtered (":");
845 printf_filtered ("\t");
846 /* Note that print_formatted sets next_address for the next
848 last_examine_address
= next_address
;
850 if (last_examine_value
)
851 value_free (last_examine_value
);
853 /* The value to be displayed is not fetched greedily.
854 Instead, to avoid the posibility of a fetched value not
855 being used, its retreval is delayed until the print code
856 uses it. When examining an instruction stream, the
857 disassembler will perform its own memory fetch using just
858 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
859 the disassembler be modified so that LAST_EXAMINE_VALUE
860 is left with the byte sequence from the last complete
861 instruction fetched from memory? */
862 last_examine_value
= value_at_lazy (val_type
, next_address
, sect
);
864 if (last_examine_value
)
865 release_value (last_examine_value
);
867 print_formatted (last_examine_value
, format
, size
, gdb_stdout
);
869 printf_filtered ("\n");
870 gdb_flush (gdb_stdout
);
875 validate_format (struct format_data fmt
, char *cmdname
)
878 error ("Size letters are meaningless in \"%s\" command.", cmdname
);
880 error ("Item count other than 1 is meaningless in \"%s\" command.",
882 if (fmt
.format
== 'i' || fmt
.format
== 's')
883 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
884 fmt
.format
, cmdname
);
887 /* Evaluate string EXP as an expression in the current language and
888 print the resulting value. EXP may contain a format specifier as the
889 first argument ("/x myvar" for example, to print myvar in hex).
893 print_command_1 (char *exp
, int inspect
, int voidprint
)
895 struct expression
*expr
;
896 register struct cleanup
*old_chain
= 0;
897 register char format
= 0;
899 struct format_data fmt
;
902 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
903 inspect_it
= inspect
;
905 if (exp
&& *exp
== '/')
908 fmt
= decode_format (&exp
, last_format
, 0);
909 validate_format (fmt
, "print");
910 last_format
= format
= fmt
.format
;
922 expr
= parse_expression (exp
);
923 old_chain
= make_cleanup (free_current_contents
, &expr
);
925 val
= evaluate_expression (expr
);
928 val
= access_value_history (0);
930 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
931 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
933 int histindex
= record_latest_value (val
);
936 annotate_value_history_begin (histindex
, VALUE_TYPE (val
));
938 annotate_value_begin (VALUE_TYPE (val
));
941 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
942 else if (histindex
>= 0)
943 printf_filtered ("$%d = ", histindex
);
946 annotate_value_history_value ();
948 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
949 printf_filtered ("\n");
952 annotate_value_history_end ();
954 annotate_value_end ();
957 printf_unfiltered ("\") )\030");
961 do_cleanups (old_chain
);
962 inspect_it
= 0; /* Reset print routines to normal */
967 print_command (char *exp
, int from_tty
)
969 print_command_1 (exp
, 0, 1);
972 /* Same as print, except in epoch, it gets its own window */
975 inspect_command (char *exp
, int from_tty
)
977 extern int epoch_interface
;
979 print_command_1 (exp
, epoch_interface
, 1);
982 /* Same as print, except it doesn't print void results. */
985 call_command (char *exp
, int from_tty
)
987 print_command_1 (exp
, 0, 0);
992 output_command (char *exp
, int from_tty
)
994 struct expression
*expr
;
995 register struct cleanup
*old_chain
;
996 register char format
= 0;
998 struct format_data fmt
;
1000 if (exp
&& *exp
== '/')
1003 fmt
= decode_format (&exp
, 0, 0);
1004 validate_format (fmt
, "output");
1005 format
= fmt
.format
;
1008 expr
= parse_expression (exp
);
1009 old_chain
= make_cleanup (free_current_contents
, &expr
);
1011 val
= evaluate_expression (expr
);
1013 annotate_value_begin (VALUE_TYPE (val
));
1015 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
1017 annotate_value_end ();
1020 gdb_flush (gdb_stdout
);
1022 do_cleanups (old_chain
);
1027 set_command (char *exp
, int from_tty
)
1029 struct expression
*expr
= parse_expression (exp
);
1030 register struct cleanup
*old_chain
=
1031 make_cleanup (free_current_contents
, &expr
);
1032 evaluate_expression (expr
);
1033 do_cleanups (old_chain
);
1038 sym_info (char *arg
, int from_tty
)
1040 struct minimal_symbol
*msymbol
;
1041 struct objfile
*objfile
;
1042 struct obj_section
*osect
;
1044 CORE_ADDR addr
, sect_addr
;
1046 unsigned int offset
;
1049 error_no_arg ("address");
1051 addr
= parse_and_eval_address (arg
);
1052 ALL_OBJSECTIONS (objfile
, osect
)
1054 sect
= osect
->the_bfd_section
;
1055 sect_addr
= overlay_mapped_address (addr
, sect
);
1057 if (osect
->addr
<= sect_addr
&& sect_addr
< osect
->endaddr
&&
1058 (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, sect
)))
1061 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1063 printf_filtered ("%s + %u in ",
1064 SYMBOL_SOURCE_NAME (msymbol
), offset
);
1066 printf_filtered ("%s in ",
1067 SYMBOL_SOURCE_NAME (msymbol
));
1068 if (pc_in_unmapped_range (addr
, sect
))
1069 printf_filtered ("load address range of ");
1070 if (section_is_overlay (sect
))
1071 printf_filtered ("%s overlay ",
1072 section_is_mapped (sect
) ? "mapped" : "unmapped");
1073 printf_filtered ("section %s", sect
->name
);
1074 printf_filtered ("\n");
1078 printf_filtered ("No symbol matches %s.\n", arg
);
1083 address_info (char *exp
, int from_tty
)
1085 register struct symbol
*sym
;
1086 register struct minimal_symbol
*msymbol
;
1088 register long basereg
;
1090 CORE_ADDR load_addr
;
1091 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1092 if exp is a field of `this'. */
1095 error ("Argument required.");
1097 sym
= lookup_symbol (exp
, get_selected_block (0), VAR_NAMESPACE
,
1098 &is_a_field_of_this
, (struct symtab
**) NULL
);
1101 if (is_a_field_of_this
)
1103 printf_filtered ("Symbol \"");
1104 fprintf_symbol_filtered (gdb_stdout
, exp
,
1105 current_language
->la_language
, DMGL_ANSI
);
1106 printf_filtered ("\" is a field of the local class variable ");
1107 if (current_language
->la_language
== language_objc
)
1108 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1110 printf_filtered ("`this'\n");
1114 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1116 if (msymbol
!= NULL
)
1118 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1120 printf_filtered ("Symbol \"");
1121 fprintf_symbol_filtered (gdb_stdout
, exp
,
1122 current_language
->la_language
, DMGL_ANSI
);
1123 printf_filtered ("\" is at ");
1124 print_address_numeric (load_addr
, 1, gdb_stdout
);
1125 printf_filtered (" in a file compiled without debugging");
1126 section
= SYMBOL_BFD_SECTION (msymbol
);
1127 if (section_is_overlay (section
))
1129 load_addr
= overlay_unmapped_address (load_addr
, section
);
1130 printf_filtered (",\n -- loaded at ");
1131 print_address_numeric (load_addr
, 1, gdb_stdout
);
1132 printf_filtered (" in overlay section %s", section
->name
);
1134 printf_filtered (".\n");
1137 error ("No symbol \"%s\" in current context.", exp
);
1141 printf_filtered ("Symbol \"");
1142 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_NAME (sym
),
1143 current_language
->la_language
, DMGL_ANSI
);
1144 printf_filtered ("\" is ");
1145 val
= SYMBOL_VALUE (sym
);
1146 basereg
= SYMBOL_BASEREG (sym
);
1147 section
= SYMBOL_BFD_SECTION (sym
);
1149 switch (SYMBOL_CLASS (sym
))
1152 case LOC_CONST_BYTES
:
1153 printf_filtered ("constant");
1157 printf_filtered ("a label at address ");
1158 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1160 if (section_is_overlay (section
))
1162 load_addr
= overlay_unmapped_address (load_addr
, section
);
1163 printf_filtered (",\n -- loaded at ");
1164 print_address_numeric (load_addr
, 1, gdb_stdout
);
1165 printf_filtered (" in overlay section %s", section
->name
);
1170 printf_filtered ("a variable in register %s", REGISTER_NAME (val
));
1174 printf_filtered ("static storage at address ");
1175 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1177 if (section_is_overlay (section
))
1179 load_addr
= overlay_unmapped_address (load_addr
, section
);
1180 printf_filtered (",\n -- loaded at ");
1181 print_address_numeric (load_addr
, 1, gdb_stdout
);
1182 printf_filtered (" in overlay section %s", section
->name
);
1187 printf_filtered ("external global (indirect addressing), at address *(");
1188 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1190 printf_filtered (")");
1191 if (section_is_overlay (section
))
1193 load_addr
= overlay_unmapped_address (load_addr
, section
);
1194 printf_filtered (",\n -- loaded at ");
1195 print_address_numeric (load_addr
, 1, gdb_stdout
);
1196 printf_filtered (" in overlay section %s", section
->name
);
1201 printf_filtered ("an argument in register %s", REGISTER_NAME (val
));
1204 case LOC_REGPARM_ADDR
:
1205 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val
));
1209 printf_filtered ("an argument at offset %ld", val
);
1213 printf_filtered ("an argument at frame offset %ld", val
);
1217 printf_filtered ("a local variable at frame offset %ld", val
);
1221 printf_filtered ("a reference argument at offset %ld", val
);
1225 printf_filtered ("a variable at offset %ld from register %s",
1226 val
, REGISTER_NAME (basereg
));
1229 case LOC_BASEREG_ARG
:
1230 printf_filtered ("an argument at offset %ld from register %s",
1231 val
, REGISTER_NAME (basereg
));
1235 printf_filtered ("a typedef");
1239 printf_filtered ("a function at address ");
1240 #ifdef GDB_TARGET_MASK_DISAS_PC
1241 print_address_numeric
1242 (load_addr
= GDB_TARGET_MASK_DISAS_PC (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
))),
1245 print_address_numeric (load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
1248 if (section_is_overlay (section
))
1250 load_addr
= overlay_unmapped_address (load_addr
, section
);
1251 printf_filtered (",\n -- loaded at ");
1252 print_address_numeric (load_addr
, 1, gdb_stdout
);
1253 printf_filtered (" in overlay section %s", section
->name
);
1257 case LOC_UNRESOLVED
:
1259 struct minimal_symbol
*msym
;
1261 msym
= lookup_minimal_symbol (SYMBOL_NAME (sym
), NULL
, NULL
);
1263 printf_filtered ("unresolved");
1266 section
= SYMBOL_BFD_SECTION (msym
);
1267 printf_filtered ("static storage at address ");
1268 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (msym
),
1270 if (section_is_overlay (section
))
1272 load_addr
= overlay_unmapped_address (load_addr
, section
);
1273 printf_filtered (",\n -- loaded at ");
1274 print_address_numeric (load_addr
, 1, gdb_stdout
);
1275 printf_filtered (" in overlay section %s", section
->name
);
1281 case LOC_HP_THREAD_LOCAL_STATIC
:
1283 "a thread-local variable at offset %ld from the thread base register %s",
1284 val
, REGISTER_NAME (basereg
));
1287 case LOC_THREAD_LOCAL_STATIC
:
1288 printf_filtered ("a thread-local variable at offset %ld in the "
1289 "thread-local storage for `%s'",
1290 val
, SYMBOL_OBJFILE (sym
)->name
);
1293 case LOC_OPTIMIZED_OUT
:
1294 printf_filtered ("optimized out");
1298 printf_filtered ("of unknown (botched) type");
1301 printf_filtered (".\n");
1305 x_command (char *exp
, int from_tty
)
1307 struct expression
*expr
;
1308 struct format_data fmt
;
1309 struct cleanup
*old_chain
;
1312 fmt
.format
= last_format
;
1313 fmt
.size
= last_size
;
1316 if (exp
&& *exp
== '/')
1319 fmt
= decode_format (&exp
, last_format
, last_size
);
1322 /* If we have an expression, evaluate it and use it as the address. */
1324 if (exp
!= 0 && *exp
!= 0)
1326 expr
= parse_expression (exp
);
1327 /* Cause expression not to be there any more
1328 if this command is repeated with Newline.
1329 But don't clobber a user-defined command's definition. */
1332 old_chain
= make_cleanup (free_current_contents
, &expr
);
1333 val
= evaluate_expression (expr
);
1334 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1335 val
= value_ind (val
);
1336 /* In rvalue contexts, such as this, functions are coerced into
1337 pointers to functions. This makes "x/i main" work. */
1338 if (/* last_format == 'i' && */
1339 TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1340 && VALUE_LVAL (val
) == lval_memory
)
1341 next_address
= VALUE_ADDRESS (val
);
1343 next_address
= value_as_address (val
);
1344 if (VALUE_BFD_SECTION (val
))
1345 next_section
= VALUE_BFD_SECTION (val
);
1346 do_cleanups (old_chain
);
1349 do_examine (fmt
, next_address
, next_section
);
1351 /* If the examine succeeds, we remember its size and format for next time. */
1352 last_size
= fmt
.size
;
1353 last_format
= fmt
.format
;
1355 /* Set a couple of internal variables if appropriate. */
1356 if (last_examine_value
)
1358 /* Make last address examined available to the user as $_. Use
1359 the correct pointer type. */
1360 struct type
*pointer_type
1361 = lookup_pointer_type (VALUE_TYPE (last_examine_value
));
1362 set_internalvar (lookup_internalvar ("_"),
1363 value_from_pointer (pointer_type
,
1364 last_examine_address
));
1366 /* Make contents of last address examined available to the user as $__. */
1367 /* If the last value has not been fetched from memory then don't
1368 fetch it now - instead mark it by voiding the $__ variable. */
1369 if (VALUE_LAZY (last_examine_value
))
1370 set_internalvar (lookup_internalvar ("__"),
1371 allocate_value (builtin_type_void
));
1373 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1378 /* Add an expression to the auto-display chain.
1379 Specify the expression. */
1382 display_command (char *exp
, int from_tty
)
1384 struct format_data fmt
;
1385 register struct expression
*expr
;
1386 register struct display
*new;
1390 if (tui_version
&& *exp
== '$')
1391 display_it
= (tui_set_layout (exp
) == TUI_FAILURE
);
1405 fmt
= decode_format (&exp
, 0, 0);
1406 if (fmt
.size
&& fmt
.format
== 0)
1408 if (fmt
.format
== 'i' || fmt
.format
== 's')
1418 innermost_block
= 0;
1419 expr
= parse_expression (exp
);
1421 new = (struct display
*) xmalloc (sizeof (struct display
));
1424 new->block
= innermost_block
;
1425 new->next
= display_chain
;
1426 new->number
= ++display_number
;
1429 display_chain
= new;
1431 if (from_tty
&& target_has_execution
)
1432 do_one_display (new);
1439 free_display (struct display
*d
)
1445 /* Clear out the display_chain.
1446 Done when new symtabs are loaded, since this invalidates
1447 the types stored in many expressions. */
1450 clear_displays (void)
1452 register struct display
*d
;
1454 while ((d
= display_chain
) != NULL
)
1457 display_chain
= d
->next
;
1462 /* Delete the auto-display number NUM. */
1465 delete_display (int num
)
1467 register struct display
*d1
, *d
;
1470 error ("No display number %d.", num
);
1472 if (display_chain
->number
== num
)
1475 display_chain
= d1
->next
;
1479 for (d
= display_chain
;; d
= d
->next
)
1482 error ("No display number %d.", num
);
1483 if (d
->next
->number
== num
)
1493 /* Delete some values from the auto-display chain.
1494 Specify the element numbers. */
1497 undisplay_command (char *args
, int from_tty
)
1499 register char *p
= args
;
1505 if (query ("Delete all auto-display expressions? "))
1514 while (*p1
>= '0' && *p1
<= '9')
1516 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1517 error ("Arguments must be display numbers.");
1521 delete_display (num
);
1524 while (*p
== ' ' || *p
== '\t')
1530 /* Display a single auto-display.
1531 Do nothing if the display cannot be printed in the current context,
1532 or if the display is disabled. */
1535 do_one_display (struct display
*d
)
1537 int within_current_scope
;
1539 if (d
->enabled_p
== 0)
1543 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1545 within_current_scope
= 1;
1546 if (!within_current_scope
)
1549 current_display_number
= d
->number
;
1551 annotate_display_begin ();
1552 printf_filtered ("%d", d
->number
);
1553 annotate_display_number_end ();
1554 printf_filtered (": ");
1560 annotate_display_format ();
1562 printf_filtered ("x/");
1563 if (d
->format
.count
!= 1)
1564 printf_filtered ("%d", d
->format
.count
);
1565 printf_filtered ("%c", d
->format
.format
);
1566 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1567 printf_filtered ("%c", d
->format
.size
);
1568 printf_filtered (" ");
1570 annotate_display_expression ();
1572 print_expression (d
->exp
, gdb_stdout
);
1573 annotate_display_expression_end ();
1575 if (d
->format
.count
!= 1)
1576 printf_filtered ("\n");
1578 printf_filtered (" ");
1580 val
= evaluate_expression (d
->exp
);
1581 addr
= value_as_address (val
);
1582 if (d
->format
.format
== 'i')
1583 addr
= ADDR_BITS_REMOVE (addr
);
1585 annotate_display_value ();
1587 do_examine (d
->format
, addr
, VALUE_BFD_SECTION (val
));
1591 annotate_display_format ();
1593 if (d
->format
.format
)
1594 printf_filtered ("/%c ", d
->format
.format
);
1596 annotate_display_expression ();
1598 print_expression (d
->exp
, gdb_stdout
);
1599 annotate_display_expression_end ();
1601 printf_filtered (" = ");
1603 annotate_display_expression ();
1605 print_formatted (evaluate_expression (d
->exp
),
1606 d
->format
.format
, d
->format
.size
, gdb_stdout
);
1607 printf_filtered ("\n");
1610 annotate_display_end ();
1612 gdb_flush (gdb_stdout
);
1613 current_display_number
= -1;
1616 /* Display all of the values on the auto-display chain which can be
1617 evaluated in the current scope. */
1622 register struct display
*d
;
1624 for (d
= display_chain
; d
; d
= d
->next
)
1628 /* Delete the auto-display which we were in the process of displaying.
1629 This is done when there is an error or a signal. */
1632 disable_display (int num
)
1634 register struct display
*d
;
1636 for (d
= display_chain
; d
; d
= d
->next
)
1637 if (d
->number
== num
)
1642 printf_unfiltered ("No display number %d.\n", num
);
1646 disable_current_display (void)
1648 if (current_display_number
>= 0)
1650 disable_display (current_display_number
);
1651 fprintf_unfiltered (gdb_stderr
, "Disabling display %d to avoid infinite recursion.\n",
1652 current_display_number
);
1654 current_display_number
= -1;
1658 display_info (char *ignore
, int from_tty
)
1660 register struct display
*d
;
1663 printf_unfiltered ("There are no auto-display expressions now.\n");
1665 printf_filtered ("Auto-display expressions now in effect:\n\
1666 Num Enb Expression\n");
1668 for (d
= display_chain
; d
; d
= d
->next
)
1670 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1672 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1674 else if (d
->format
.format
)
1675 printf_filtered ("/%c ", d
->format
.format
);
1676 print_expression (d
->exp
, gdb_stdout
);
1677 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1678 printf_filtered (" (cannot be evaluated in the current context)");
1679 printf_filtered ("\n");
1680 gdb_flush (gdb_stdout
);
1685 enable_display (char *args
, int from_tty
)
1687 register char *p
= args
;
1690 register struct display
*d
;
1694 for (d
= display_chain
; d
; d
= d
->next
)
1701 while (*p1
>= '0' && *p1
<= '9')
1703 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1704 error ("Arguments must be display numbers.");
1708 for (d
= display_chain
; d
; d
= d
->next
)
1709 if (d
->number
== num
)
1714 printf_unfiltered ("No display number %d.\n", num
);
1717 while (*p
== ' ' || *p
== '\t')
1724 disable_display_command (char *args
, int from_tty
)
1726 register char *p
= args
;
1728 register struct display
*d
;
1732 for (d
= display_chain
; d
; d
= d
->next
)
1739 while (*p1
>= '0' && *p1
<= '9')
1741 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1742 error ("Arguments must be display numbers.");
1744 disable_display (atoi (p
));
1747 while (*p
== ' ' || *p
== '\t')
1753 /* Print the value in stack frame FRAME of a variable
1754 specified by a struct symbol. */
1757 print_variable_value (struct symbol
*var
, struct frame_info
*frame
,
1758 struct ui_file
*stream
)
1760 struct value
*val
= read_var_value (var
, frame
);
1762 value_print (val
, stream
, 0, Val_pretty_default
);
1765 /* Print the arguments of a stack frame, given the function FUNC
1766 running in that frame (as a symbol), the info on the frame,
1767 and the number of args according to the stack frame (or -1 if unknown). */
1769 /* References here and elsewhere to "number of args according to the
1770 stack frame" appear in all cases to refer to "number of ints of args
1771 according to the stack frame". At least for VAX, i386, isi. */
1774 print_frame_args (struct symbol
*func
, struct frame_info
*fi
, int num
,
1775 struct ui_file
*stream
)
1777 struct block
*b
= NULL
;
1780 register struct symbol
*sym
;
1782 /* Offset of next stack argument beyond the one we have seen that is
1783 at the highest offset.
1784 -1 if we haven't come to a stack argument yet. */
1785 long highest_offset
= -1;
1787 /* Number of ints of arguments that we have printed so far. */
1788 int args_printed
= 0;
1789 struct cleanup
*old_chain
, *list_chain
;
1790 struct ui_stream
*stb
;
1792 stb
= ui_out_stream_new (uiout
);
1793 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1797 b
= SYMBOL_BLOCK_VALUE (func
);
1798 /* Function blocks are order sensitive, and thus should not be
1800 gdb_assert (BLOCK_HASHTABLE (b
) == 0);
1802 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1806 /* Keep track of the highest stack argument offset seen, and
1807 skip over any kinds of symbols we don't care about. */
1809 switch (SYMBOL_CLASS (sym
))
1814 long current_offset
= SYMBOL_VALUE (sym
);
1815 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1817 /* Compute address of next argument by adding the size of
1818 this argument and rounding to an int boundary. */
1820 ((current_offset
+ arg_size
+ sizeof (int) - 1)
1821 & ~(sizeof (int) - 1));
1823 /* If this is the highest offset seen yet, set highest_offset. */
1824 if (highest_offset
== -1
1825 || (current_offset
> highest_offset
))
1826 highest_offset
= current_offset
;
1828 /* Add the number of ints we're about to print to args_printed. */
1829 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1832 /* We care about types of symbols, but don't need to keep track of
1833 stack offsets in them. */
1835 case LOC_REGPARM_ADDR
:
1837 case LOC_BASEREG_ARG
:
1840 /* Other types of symbols we just skip over. */
1845 /* We have to look up the symbol because arguments can have
1846 two entries (one a parameter, one a local) and the one we
1847 want is the local, which lookup_symbol will find for us.
1848 This includes gcc1 (not gcc2) on the sparc when passing a
1849 small structure and gcc2 when the argument type is float
1850 and it is passed as a double and converted to float by
1851 the prologue (in the latter case the type of the LOC_ARG
1852 symbol is double and the type of the LOC_LOCAL symbol is
1854 /* But if the parameter name is null, don't try it.
1855 Null parameter names occur on the RS/6000, for traceback tables.
1856 FIXME, should we even print them? */
1858 if (*SYMBOL_NAME (sym
))
1860 struct symbol
*nsym
;
1861 nsym
= lookup_symbol
1863 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1864 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
1866 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
1867 it was passed on the stack and loaded into a register,
1868 or passed in a register and stored in a stack slot.
1869 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
1871 Reasons for using the LOC_ARG:
1872 (1) because find_saved_registers may be slow for remote
1874 (2) because registers are often re-used and stack slots
1875 rarely (never?) are. Therefore using the stack slot is
1876 much less likely to print garbage.
1878 Reasons why we might want to use the LOC_REGISTER:
1879 (1) So that the backtrace prints the same value as
1880 "print foo". I see no compelling reason why this needs
1881 to be the case; having the backtrace print the value which
1882 was passed in, and "print foo" print the value as modified
1883 within the called function, makes perfect sense to me.
1885 Additional note: It might be nice if "info args" displayed
1887 One more note: There is a case with sparc structure passing
1888 where we need to use the LOC_REGISTER, but this is dealt with
1889 by creating a single LOC_REGPARM in symbol reading. */
1891 /* Leave sym (the LOC_ARG) alone. */
1898 /* Print the current arg. */
1900 ui_out_text (uiout
, ", ");
1901 ui_out_wrap_hint (uiout
, " ");
1903 annotate_arg_begin ();
1905 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
1906 fprintf_symbol_filtered (stb
->stream
, SYMBOL_SOURCE_NAME (sym
),
1907 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1908 ui_out_field_stream (uiout
, "name", stb
);
1909 annotate_arg_name_end ();
1910 ui_out_text (uiout
, "=");
1912 /* Avoid value_print because it will deref ref parameters. We just
1913 want to print their addresses. Print ??? for args whose address
1914 we do not know. We pass 2 as "recurse" to val_print because our
1915 standard indentation here is 4 spaces, and val_print indents
1916 2 for each recurse. */
1917 val
= read_var_value (sym
, fi
);
1919 annotate_arg_value (val
== NULL
? NULL
: VALUE_TYPE (val
));
1923 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
1924 VALUE_ADDRESS (val
),
1925 stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
1926 ui_out_field_stream (uiout
, "value", stb
);
1929 ui_out_text (uiout
, "???");
1931 /* Invoke ui_out_tuple_end. */
1932 do_cleanups (list_chain
);
1934 annotate_arg_end ();
1940 /* Don't print nameless args in situations where we don't know
1941 enough about the stack to find them. */
1946 if (highest_offset
== -1)
1947 start
= FRAME_ARGS_SKIP
;
1949 start
= highest_offset
;
1951 print_frame_nameless_args (fi
, start
, num
- args_printed
,
1954 do_cleanups (old_chain
);
1957 /* Print nameless args on STREAM.
1958 FI is the frameinfo for this frame, START is the offset
1959 of the first nameless arg, and NUM is the number of nameless args to
1960 print. FIRST is nonzero if this is the first argument (not just
1961 the first nameless arg). */
1964 print_frame_nameless_args (struct frame_info
*fi
, long start
, int num
,
1965 int first
, struct ui_file
*stream
)
1971 for (i
= 0; i
< num
; i
++)
1974 #ifdef NAMELESS_ARG_VALUE
1975 NAMELESS_ARG_VALUE (fi
, start
, &arg_value
);
1977 argsaddr
= FRAME_ARGS_ADDRESS (fi
);
1981 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
1985 fprintf_filtered (stream
, ", ");
1987 #ifdef PRINT_NAMELESS_INTEGER
1988 PRINT_NAMELESS_INTEGER (stream
, arg_value
);
1990 #ifdef PRINT_TYPELESS_INTEGER
1991 PRINT_TYPELESS_INTEGER (stream
, builtin_type_int
, (LONGEST
) arg_value
);
1993 fprintf_filtered (stream
, "%ld", arg_value
);
1994 #endif /* PRINT_TYPELESS_INTEGER */
1995 #endif /* PRINT_NAMELESS_INTEGER */
1997 start
+= sizeof (int);
2003 printf_command (char *arg
, int from_tty
)
2005 register char *f
= NULL
;
2006 register char *s
= arg
;
2007 char *string
= NULL
;
2008 struct value
**val_args
;
2010 char *current_substring
;
2012 int allocated_args
= 20;
2013 struct cleanup
*old_cleanups
;
2015 val_args
= (struct value
**) xmalloc (allocated_args
2016 * sizeof (struct value
*));
2017 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2020 error_no_arg ("format-control string and values to print");
2022 /* Skip white space before format string */
2023 while (*s
== ' ' || *s
== '\t')
2026 /* A format string should follow, enveloped in double quotes */
2028 error ("Bad format string, missing '\"'.");
2030 /* Parse the format-control string and copy it into the string STRING,
2031 processing some kinds of escape sequence. */
2033 f
= string
= (char *) alloca (strlen (s
) + 1);
2041 error ("Bad format string, non-terminated '\"'.");
2074 /* ??? TODO: handle other escape sequences */
2075 error ("Unrecognized escape character \\%c in format string.",
2085 /* Skip over " and following space and comma. */
2088 while (*s
== ' ' || *s
== '\t')
2091 if (*s
!= ',' && *s
!= 0)
2092 error ("Invalid argument syntax");
2096 while (*s
== ' ' || *s
== '\t')
2099 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2100 substrings
= alloca (strlen (string
) * 2);
2101 current_substring
= substrings
;
2104 /* Now scan the string for %-specs and see what kinds of args they want.
2105 argclass[I] classifies the %-specs so we can give printf_filtered
2106 something of the right size. */
2110 no_arg
, int_arg
, string_arg
, double_arg
, long_long_arg
2112 enum argclass
*argclass
;
2113 enum argclass this_argclass
;
2119 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2127 while (strchr ("0123456789.hlL-+ #", *f
))
2129 if (*f
== 'l' || *f
== 'L')
2136 this_argclass
= string_arg
;
2142 this_argclass
= double_arg
;
2146 error ("`*' not supported for precision or width in printf");
2149 error ("Format specifier `n' not supported in printf");
2152 this_argclass
= no_arg
;
2157 this_argclass
= long_long_arg
;
2159 this_argclass
= int_arg
;
2163 if (this_argclass
!= no_arg
)
2165 strncpy (current_substring
, last_arg
, f
- last_arg
);
2166 current_substring
+= f
- last_arg
;
2167 *current_substring
++ = '\0';
2169 argclass
[nargs_wanted
++] = this_argclass
;
2173 /* Now, parse all arguments and evaluate them.
2174 Store the VALUEs in VAL_ARGS. */
2179 if (nargs
== allocated_args
)
2180 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2181 (allocated_args
*= 2)
2182 * sizeof (struct value
*));
2184 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2186 /* If format string wants a float, unchecked-convert the value to
2187 floating point of the same size */
2189 if (argclass
[nargs
] == double_arg
)
2191 struct type
*type
= VALUE_TYPE (val_args
[nargs
]);
2192 if (TYPE_LENGTH (type
) == sizeof (float))
2193 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
2194 if (TYPE_LENGTH (type
) == sizeof (double))
2195 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
2203 if (nargs
!= nargs_wanted
)
2204 error ("Wrong number of arguments for specified format-string");
2206 /* Now actually print them. */
2207 current_substring
= substrings
;
2208 for (i
= 0; i
< nargs
; i
++)
2210 switch (argclass
[i
])
2217 tem
= value_as_address (val_args
[i
]);
2219 /* This is a %s argument. Find the length of the string. */
2224 read_memory (tem
+ j
, &c
, 1);
2229 /* Copy the string contents into a string inside GDB. */
2230 str
= (char *) alloca (j
+ 1);
2232 read_memory (tem
, str
, j
);
2235 printf_filtered (current_substring
, str
);
2240 double val
= value_as_double (val_args
[i
]);
2241 printf_filtered (current_substring
, val
);
2245 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2247 long long val
= value_as_long (val_args
[i
]);
2248 printf_filtered (current_substring
, val
);
2252 error ("long long not supported in printf");
2256 /* FIXME: there should be separate int_arg and long_arg. */
2257 long val
= value_as_long (val_args
[i
]);
2258 printf_filtered (current_substring
, val
);
2261 default: /* purecov: deadcode */
2262 error ("internal error in printf_command"); /* purecov: deadcode */
2264 /* Skip to the next substring. */
2265 current_substring
+= strlen (current_substring
) + 1;
2267 /* Print the portion of the format string after the last argument. */
2268 printf_filtered (last_arg
);
2270 do_cleanups (old_cleanups
);
2273 /* Print the instruction at address MEMADDR in debugged memory,
2274 on STREAM. Returns length of the instruction, in bytes. */
2277 print_insn (CORE_ADDR memaddr
, struct ui_file
*stream
)
2279 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
2280 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_BIG
;
2282 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_LITTLE
;
2284 if (TARGET_ARCHITECTURE
!= NULL
)
2285 TARGET_PRINT_INSN_INFO
->mach
= TARGET_ARCHITECTURE
->mach
;
2286 /* else: should set .mach=0 but some disassemblers don't grok this */
2288 TARGET_PRINT_INSN_INFO
->stream
= stream
;
2290 return TARGET_PRINT_INSN (memaddr
, TARGET_PRINT_INSN_INFO
);
2295 _initialize_printcmd (void)
2297 struct cmd_list_element
*c
;
2299 current_display_number
= -1;
2301 add_info ("address", address_info
,
2302 "Describe where symbol SYM is stored.");
2304 add_info ("symbol", sym_info
,
2305 "Describe what symbol is at location ADDR.\n\
2306 Only for symbols with fixed locations (global or static scope).");
2308 add_com ("x", class_vars
, x_command
,
2309 concat ("Examine memory: x/FMT ADDRESS.\n\
2310 ADDRESS is an expression for the memory address to examine.\n\
2311 FMT is a repeat count followed by a format letter and a size letter.\n\
2312 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2313 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2314 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2315 The specified number of objects of the specified size are printed\n\
2316 according to the format.\n\n\
2317 Defaults for format and size letters are those previously used.\n\
2318 Default count is 1. Default address is following last thing printed\n\
2319 with this command or \"print\".", NULL
));
2322 add_com ("whereis", class_vars
, whereis_command
,
2323 "Print line number and file of definition of variable.");
2326 add_info ("display", display_info
,
2327 "Expressions to display when program stops, with code numbers.");
2329 add_cmd ("undisplay", class_vars
, undisplay_command
,
2330 "Cancel some expressions to be displayed when program stops.\n\
2331 Arguments are the code numbers of the expressions to stop displaying.\n\
2332 No argument means cancel all automatic-display expressions.\n\
2333 \"delete display\" has the same effect as this command.\n\
2334 Do \"info display\" to see current list of code numbers.",
2337 add_com ("display", class_vars
, display_command
,
2338 "Print value of expression EXP each time the program stops.\n\
2339 /FMT may be used before EXP as in the \"print\" command.\n\
2340 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2341 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2342 and examining is done as in the \"x\" command.\n\n\
2343 With no argument, display all currently requested auto-display expressions.\n\
2344 Use \"undisplay\" to cancel display requests previously made."
2347 add_cmd ("display", class_vars
, enable_display
,
2348 "Enable some expressions to be displayed when program stops.\n\
2349 Arguments are the code numbers of the expressions to resume displaying.\n\
2350 No argument means enable all automatic-display expressions.\n\
2351 Do \"info display\" to see current list of code numbers.", &enablelist
);
2353 add_cmd ("display", class_vars
, disable_display_command
,
2354 "Disable some expressions to be displayed when program stops.\n\
2355 Arguments are the code numbers of the expressions to stop displaying.\n\
2356 No argument means disable all automatic-display expressions.\n\
2357 Do \"info display\" to see current list of code numbers.", &disablelist
);
2359 add_cmd ("display", class_vars
, undisplay_command
,
2360 "Cancel some expressions to be displayed when program stops.\n\
2361 Arguments are the code numbers of the expressions to stop displaying.\n\
2362 No argument means cancel all automatic-display expressions.\n\
2363 Do \"info display\" to see current list of code numbers.", &deletelist
);
2365 add_com ("printf", class_vars
, printf_command
,
2366 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2367 This is useful for formatted output in user-defined commands.");
2369 add_com ("output", class_vars
, output_command
,
2370 "Like \"print\" but don't put in value history and don't print newline.\n\
2371 This is useful in user-defined commands.");
2373 add_prefix_cmd ("set", class_vars
, set_command
,
2374 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2375 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2376 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2377 with $), a register (a few standard names starting with $), or an actual\n\
2378 variable in the program being debugged. EXP is any valid expression.\n",
2379 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2380 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2381 You can see these environment settings with the \"show\" command.", NULL
),
2382 &setlist
, "set ", 1, &cmdlist
);
2384 add_com ("assign", class_vars
, set_command
, concat ("Evaluate expression \
2385 EXP and assign result to variable VAR, using assignment\n\
2386 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2387 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2388 with $), a register (a few standard names starting with $), or an actual\n\
2389 variable in the program being debugged. EXP is any valid expression.\n",
2390 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2391 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2392 You can see these environment settings with the \"show\" command.", NULL
));
2394 /* "call" is the same as "set", but handy for dbx users to call fns. */
2395 c
= add_com ("call", class_vars
, call_command
,
2396 "Call a function in the program.\n\
2397 The argument is the function name and arguments, in the notation of the\n\
2398 current working language. The result is printed and saved in the value\n\
2399 history, if it is not void.");
2400 set_cmd_completer (c
, location_completer
);
2402 add_cmd ("variable", class_vars
, set_command
,
2403 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2404 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2405 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2406 with $), a register (a few standard names starting with $), or an actual\n\
2407 variable in the program being debugged. EXP is any valid expression.\n\
2408 This may usually be abbreviated to simply \"set\".",
2411 c
= add_com ("print", class_vars
, print_command
,
2412 concat ("Print value of expression EXP.\n\
2413 Variables accessible are those of the lexical environment of the selected\n\
2414 stack frame, plus all those whose scope is global or an entire file.\n\
2416 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2417 $$NUM refers to NUM'th value back from the last one.\n\
2418 Names starting with $ refer to registers (with the values they would have\n",
2419 "if the program were to return to the stack frame now selected, restoring\n\
2420 all registers saved by frames farther in) or else to debugger\n\
2421 \"convenience\" variables (any such name not a known register).\n\
2422 Use assignment expressions to give values to convenience variables.\n",
2424 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2425 @ is a binary operator for treating consecutive data objects\n\
2426 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2427 element is FOO, whose second element is stored in the space following\n\
2428 where FOO is stored, etc. FOO must be an expression whose value\n\
2429 resides in memory.\n",
2431 EXP may be preceded with /FMT, where FMT is a format letter\n\
2432 but no count or size letter (see \"x\" command).", NULL
));
2433 set_cmd_completer (c
, location_completer
);
2434 add_com_alias ("p", "print", class_vars
, 1);
2436 c
= add_com ("inspect", class_vars
, inspect_command
,
2437 "Same as \"print\" command, except that if you are running in the epoch\n\
2438 environment, the value is printed in its own window.");
2439 set_cmd_completer (c
, location_completer
);
2442 add_set_cmd ("max-symbolic-offset", no_class
, var_uinteger
,
2443 (char *) &max_symbolic_offset
,
2444 "Set the largest offset that will be printed in <symbol+1234> form.",
2448 add_set_cmd ("symbol-filename", no_class
, var_boolean
,
2449 (char *) &print_symbol_filename
,
2450 "Set printing of source filename and line number with <symbol>.",
2454 /* For examine/instruction a single byte quantity is specified as
2455 the data. This avoids problems with value_at_lazy() requiring a
2456 valid data type (and rejecting VOID). */
2457 examine_i_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_i_type", NULL
);
2459 examine_b_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_b_type", NULL
);
2460 examine_h_type
= init_type (TYPE_CODE_INT
, 2, 0, "examine_h_type", NULL
);
2461 examine_w_type
= init_type (TYPE_CODE_INT
, 4, 0, "examine_w_type", NULL
);
2462 examine_g_type
= init_type (TYPE_CODE_INT
, 8, 0, "examine_g_type", NULL
);