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"
45 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
46 extern int addressprint
; /* Whether to print hex addresses in HLL " */
55 /* Last specified output format. */
57 static char last_format
= 'x';
59 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
61 static char last_size
= 'w';
63 /* Default address to examine next. */
65 static CORE_ADDR next_address
;
67 /* Default section to examine next. */
69 static asection
*next_section
;
71 /* Last address examined. */
73 static CORE_ADDR last_examine_address
;
75 /* Contents of last address examined.
76 This is not valid past the end of the `x' command! */
78 static struct value
*last_examine_value
;
80 /* Largest offset between a symbolic value and an address, that will be
81 printed as `0x1234 <symbol+offset>'. */
83 static unsigned int max_symbolic_offset
= UINT_MAX
;
85 /* Append the source filename and linenumber of the symbol when
86 printing a symbolic value as `<symbol at filename:linenum>' if set. */
87 static int print_symbol_filename
= 0;
89 /* Number of auto-display expression currently being displayed.
90 So that we can disable it if we get an error or a signal within it.
91 -1 when not doing one. */
93 int current_display_number
;
95 /* Flag to low-level print routines that this value is being printed
96 in an epoch window. We'd like to pass this as a parameter, but
97 every routine would need to take it. Perhaps we can encapsulate
98 this in the I/O stream once we have GNU stdio. */
104 /* Chain link to next auto-display item. */
105 struct display
*next
;
106 /* Expression to be evaluated and displayed. */
107 struct expression
*exp
;
108 /* Item number of this auto-display item. */
110 /* Display format specified. */
111 struct format_data format
;
112 /* Innermost block required by this expression when evaluated */
114 /* Status of this display (enabled or disabled) */
118 /* Chain of expressions whose values should be displayed
119 automatically each time the program stops. */
121 static struct display
*display_chain
;
123 static int display_number
;
125 /* Prototypes for exported functions. */
127 void output_command (char *, int);
129 void _initialize_printcmd (void);
131 /* Prototypes for local functions. */
133 static void delete_display (int);
135 static void enable_display (char *, int);
137 static void disable_display_command (char *, int);
139 static void disassemble_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 int print_insn (CORE_ADDR
, struct ui_file
*);
181 static void sym_info (char *, int);
184 /* Decode a format specification. *STRING_PTR should point to it.
185 OFORMAT and OSIZE are used as defaults for the format and size
186 if none are given in the format specification.
187 If OSIZE is zero, then the size field of the returned value
188 should be set only if a size is explicitly specified by the
190 The structure returned describes all the data
191 found in the specification. In addition, *STRING_PTR is advanced
192 past the specification and past all whitespace following it. */
194 static struct format_data
195 decode_format (char **string_ptr
, int oformat
, int osize
)
197 struct format_data val
;
198 register char *p
= *string_ptr
;
204 if (*p
>= '0' && *p
<= '9')
205 val
.count
= atoi (p
);
206 while (*p
>= '0' && *p
<= '9')
209 /* Now process size or format letters that follow. */
213 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
215 else if (*p
>= 'a' && *p
<= 'z')
221 while (*p
== ' ' || *p
== '\t')
225 /* Set defaults for format and size if not specified. */
226 if (val
.format
== '?')
230 /* Neither has been specified. */
231 val
.format
= oformat
;
235 /* If a size is specified, any format makes a reasonable
236 default except 'i'. */
237 val
.format
= oformat
== 'i' ? 'x' : oformat
;
239 else if (val
.size
== '?')
244 /* Pick the appropriate size for an address. */
245 if (TARGET_PTR_BIT
== 64)
246 val
.size
= osize
? 'g' : osize
;
247 else if (TARGET_PTR_BIT
== 32)
248 val
.size
= osize
? 'w' : osize
;
249 else if (TARGET_PTR_BIT
== 16)
250 val
.size
= osize
? 'h' : osize
;
252 /* Bad value for TARGET_PTR_BIT */
253 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
256 /* Floating point has to be word or giantword. */
257 if (osize
== 'w' || osize
== 'g')
260 /* Default it to giantword if the last used size is not
262 val
.size
= osize
? 'g' : osize
;
265 /* Characters default to one byte. */
266 val
.size
= osize
? 'b' : osize
;
269 /* The default is the size most recently specified. */
276 /* Print value VAL on stream according to FORMAT, a letter or 0.
277 Do not end with a newline.
278 0 means print VAL according to its own type.
279 SIZE is the letter for the size of datum being printed.
280 This is used to pad hex numbers so they line up. */
283 print_formatted (struct value
*val
, register int format
, int size
,
284 struct ui_file
*stream
)
286 struct type
*type
= check_typedef (VALUE_TYPE (val
));
287 int len
= TYPE_LENGTH (type
);
289 if (VALUE_LVAL (val
) == lval_memory
)
291 next_address
= VALUE_ADDRESS (val
) + len
;
292 next_section
= VALUE_BFD_SECTION (val
);
298 /* FIXME: Need to handle wchar_t's here... */
299 next_address
= VALUE_ADDRESS (val
)
300 + val_print_string (VALUE_ADDRESS (val
), -1, 1, stream
);
301 next_section
= VALUE_BFD_SECTION (val
);
305 /* The old comment says
306 "Force output out, print_insn not using _filtered".
307 I'm not completely sure what that means, I suspect most print_insn
308 now do use _filtered, so I guess it's obsolete.
309 --Yes, it does filter now, and so this is obsolete. -JB */
311 /* We often wrap here if there are long symbolic names. */
313 next_address
= VALUE_ADDRESS (val
)
314 + print_insn (VALUE_ADDRESS (val
), stream
);
315 next_section
= VALUE_BFD_SECTION (val
);
320 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
321 || TYPE_CODE (type
) == TYPE_CODE_STRING
322 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
323 || TYPE_CODE (type
) == TYPE_CODE_UNION
)
324 /* If format is 0, use the 'natural' format for
325 * that type of value. If the type is non-scalar,
326 * we have to use language rules to print it as
327 * a series of scalars.
329 value_print (val
, stream
, format
, Val_pretty_default
);
331 /* User specified format, so don't look to the
332 * the type to tell us what to do.
334 print_scalar_formatted (VALUE_CONTENTS (val
), type
,
335 format
, size
, stream
);
339 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
340 according to letters FORMAT and SIZE on STREAM.
341 FORMAT may not be zero. Formats s and i are not supported at this level.
343 This is how the elements of an array or structure are printed
347 print_scalar_formatted (char *valaddr
, struct type
*type
, int format
, int size
,
348 struct ui_file
*stream
)
351 unsigned int len
= TYPE_LENGTH (type
);
353 if (len
> sizeof (LONGEST
)
361 if (!TYPE_UNSIGNED (type
)
362 || !extract_long_unsigned_integer (valaddr
, len
, &val_long
))
364 /* We can't print it normally, but we can print it in hex.
365 Printing it in the wrong radix is more useful than saying
366 "use /x, you dummy". */
367 /* FIXME: we could also do octal or binary if that was the
369 /* FIXME: we should be using the size field to give us a
370 minimum field width to print. */
373 print_octal_chars (stream
, valaddr
, len
);
374 else if (format
== 'd')
375 print_decimal_chars (stream
, valaddr
, len
);
376 else if (format
== 't')
377 print_binary_chars (stream
, valaddr
, len
);
379 /* replace with call to print_hex_chars? Looks
380 like val_print_type_code_int is redoing
383 val_print_type_code_int (type
, valaddr
, stream
);
388 /* If we get here, extract_long_unsigned_integer set val_long. */
390 else if (format
!= 'f')
391 val_long
= unpack_long (type
, valaddr
);
393 /* If the value is a pointer, and pointers and addresses are not the
394 same, then at this point, the value's length (in target bytes) is
395 TARGET_ADDR_BIT/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
396 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
397 len
= TARGET_ADDR_BIT
/ TARGET_CHAR_BIT
;
399 /* If we are printing it as unsigned, truncate it in case it is actually
400 a negative signed value (e.g. "print/u (short)-1" should print 65535
401 (if shorts are 16 bits) instead of 4294967295). */
404 if (len
< sizeof (LONGEST
))
405 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
413 /* no size specified, like in print. Print varying # of digits. */
414 print_longest (stream
, 'x', 1, val_long
);
423 print_longest (stream
, size
, 1, val_long
);
426 error ("Undefined output size \"%c\".", size
);
431 print_longest (stream
, 'd', 1, val_long
);
435 print_longest (stream
, 'u', 0, val_long
);
440 print_longest (stream
, 'o', 1, val_long
);
442 fprintf_filtered (stream
, "0");
447 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
448 print_address (addr
, stream
);
453 value_print (value_from_longest (builtin_type_true_char
, val_long
),
454 stream
, 0, Val_pretty_default
);
458 if (len
== TYPE_LENGTH (builtin_type_float
))
459 type
= builtin_type_float
;
460 else if (len
== TYPE_LENGTH (builtin_type_double
))
461 type
= builtin_type_double
;
462 else if (len
== TYPE_LENGTH (builtin_type_long_double
))
463 type
= builtin_type_long_double
;
464 print_floating (valaddr
, type
, stream
);
468 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
471 /* Binary; 't' stands for "two". */
473 char bits
[8 * (sizeof val_long
) + 1];
474 char buf
[8 * (sizeof val_long
) + 32];
479 width
= 8 * (sizeof val_long
);
496 error ("Undefined output size \"%c\".", size
);
502 bits
[width
] = (val_long
& 1) ? '1' : '0';
507 while (*cp
&& *cp
== '0')
512 strcpy (buf
, local_binary_format_prefix ());
514 strcat (buf
, local_binary_format_suffix ());
515 fprintf_filtered (stream
, buf
);
520 error ("Undefined output format \"%c\".", format
);
524 /* Specify default address for `x' command.
525 `info lines' uses this. */
528 set_next_address (CORE_ADDR addr
)
532 /* Make address available to the user as $_. */
533 set_internalvar (lookup_internalvar ("_"),
534 value_from_pointer (lookup_pointer_type (builtin_type_void
),
538 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
539 after LEADIN. Print nothing if no symbolic name is found nearby.
540 Optionally also print source file and line number, if available.
541 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
542 or to interpret it as a possible C++ name and convert it back to source
543 form. However note that DO_DEMANGLE can be overridden by the specific
544 settings of the demangle and asm_demangle variables. */
547 print_address_symbolic (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
,
551 char *filename
= NULL
;
556 /* throw away both name and filename */
557 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
558 make_cleanup (free_current_contents
, &filename
);
560 if (build_address_symbolic (addr
, do_demangle
, &name
, &offset
, &filename
, &line
, &unmapped
))
562 do_cleanups (cleanup_chain
);
566 fputs_filtered (leadin
, stream
);
568 fputs_filtered ("<*", stream
);
570 fputs_filtered ("<", stream
);
571 fputs_filtered (name
, stream
);
573 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
575 /* Append source filename and line number if desired. Give specific
576 line # of this addr, if we have it; else line # of the nearest symbol. */
577 if (print_symbol_filename
&& filename
!= NULL
)
580 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
582 fprintf_filtered (stream
, " in %s", filename
);
585 fputs_filtered ("*>", stream
);
587 fputs_filtered (">", stream
);
589 do_cleanups (cleanup_chain
);
592 /* Given an address ADDR return all the elements needed to print the
593 address in a symbolic form. NAME can be mangled or not depending
594 on DO_DEMANGLE (and also on the asm_demangle global variable,
595 manipulated via ''set print asm-demangle''). Return 0 in case of
596 success, when all the info in the OUT paramters is valid. Return 1
599 build_address_symbolic (CORE_ADDR addr
, /* IN */
600 int do_demangle
, /* IN */
601 char **name
, /* OUT */
602 int *offset
, /* OUT */
603 char **filename
, /* OUT */
605 int *unmapped
) /* OUT */
607 struct minimal_symbol
*msymbol
;
608 struct symbol
*symbol
;
609 struct symtab
*symtab
= 0;
610 CORE_ADDR name_location
= 0;
611 asection
*section
= 0;
612 char *name_temp
= "";
614 /* Let's say it is unmapped. */
617 /* Determine if the address is in an overlay, and whether it is
619 if (overlay_debugging
)
621 section
= find_pc_overlay (addr
);
622 if (pc_in_unmapped_range (addr
, section
))
625 addr
= overlay_mapped_address (addr
, section
);
629 /* On some targets, add in extra "flag" bits to PC for
630 disassembly. This should ensure that "rounding errors" in
631 symbol addresses that are masked for disassembly favour the
632 the correct symbol. */
634 #ifdef GDB_TARGET_UNMASK_DISAS_PC
635 addr
= GDB_TARGET_UNMASK_DISAS_PC (addr
);
638 /* First try to find the address in the symbol table, then
639 in the minsyms. Take the closest one. */
641 /* This is defective in the sense that it only finds text symbols. So
642 really this is kind of pointless--we should make sure that the
643 minimal symbols have everything we need (by changing that we could
644 save some memory, but for many debug format--ELF/DWARF or
645 anything/stabs--it would be inconvenient to eliminate those minimal
647 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
648 symbol
= find_pc_sect_function (addr
, section
);
652 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
654 name_temp
= SYMBOL_SOURCE_NAME (symbol
);
656 name_temp
= SYMBOL_LINKAGE_NAME (symbol
);
661 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
663 /* The msymbol is closer to the address than the symbol;
664 use the msymbol instead. */
667 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
669 name_temp
= SYMBOL_SOURCE_NAME (msymbol
);
671 name_temp
= SYMBOL_LINKAGE_NAME (msymbol
);
674 if (symbol
== NULL
&& msymbol
== NULL
)
677 /* On some targets, mask out extra "flag" bits from PC for handsome
680 #ifdef GDB_TARGET_MASK_DISAS_PC
681 name_location
= GDB_TARGET_MASK_DISAS_PC (name_location
);
682 addr
= GDB_TARGET_MASK_DISAS_PC (addr
);
685 /* If the nearest symbol is too far away, don't print anything symbolic. */
687 /* For when CORE_ADDR is larger than unsigned int, we do math in
688 CORE_ADDR. But when we detect unsigned wraparound in the
689 CORE_ADDR math, we ignore this test and print the offset,
690 because addr+max_symbolic_offset has wrapped through the end
691 of the address space back to the beginning, giving bogus comparison. */
692 if (addr
> name_location
+ max_symbolic_offset
693 && name_location
+ max_symbolic_offset
> name_location
)
696 *offset
= addr
- name_location
;
698 *name
= xstrdup (name_temp
);
700 if (print_symbol_filename
)
702 struct symtab_and_line sal
;
704 sal
= find_pc_sect_line (addr
, section
, 0);
708 *filename
= xstrdup (sal
.symtab
->filename
);
711 else if (symtab
&& symbol
&& symbol
->line
)
713 *filename
= xstrdup (symtab
->filename
);
714 *line
= symbol
->line
;
718 *filename
= xstrdup (symtab
->filename
);
725 /* Print address ADDR on STREAM. USE_LOCAL means the same thing as for
728 print_address_numeric (CORE_ADDR addr
, int use_local
, struct ui_file
*stream
)
730 /* Truncate address to the size of a target address, avoiding shifts
731 larger or equal than the width of a CORE_ADDR. The local
732 variable ADDR_BIT stops the compiler reporting a shift overflow
733 when it won't occur. */
734 /* NOTE: This assumes that the significant address information is
735 kept in the least significant bits of ADDR - the upper bits were
736 either zero or sign extended. Should ADDRESS_TO_POINTER() or
737 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
739 int addr_bit
= TARGET_ADDR_BIT
;
741 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
742 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
743 print_longest (stream
, 'x', use_local
, (ULONGEST
) addr
);
746 /* Print address ADDR symbolically on STREAM.
747 First print it as a number. Then perhaps print
748 <SYMBOL + OFFSET> after the number. */
751 print_address (CORE_ADDR addr
, struct ui_file
*stream
)
753 print_address_numeric (addr
, 1, stream
);
754 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
757 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
758 controls whether to print the symbolic name "raw" or demangled.
759 Global setting "addressprint" controls whether to print hex address
763 print_address_demangle (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
)
767 fprintf_filtered (stream
, "0");
769 else if (addressprint
)
771 print_address_numeric (addr
, 1, stream
);
772 print_address_symbolic (addr
, stream
, do_demangle
, " ");
776 print_address_symbolic (addr
, stream
, do_demangle
, "");
781 /* These are the types that $__ will get after an examine command of one
784 static struct type
*examine_i_type
;
786 static struct type
*examine_b_type
;
787 static struct type
*examine_h_type
;
788 static struct type
*examine_w_type
;
789 static struct type
*examine_g_type
;
791 /* Examine data at address ADDR in format FMT.
792 Fetch it from memory and print on gdb_stdout. */
795 do_examine (struct format_data fmt
, CORE_ADDR addr
, asection
*sect
)
797 register char format
= 0;
799 register int count
= 1;
800 struct type
*val_type
= NULL
;
802 register int maxelts
;
810 /* String or instruction format implies fetch single bytes
811 regardless of the specified size. */
812 if (format
== 's' || format
== 'i')
816 val_type
= examine_i_type
;
817 else if (size
== 'b')
818 val_type
= examine_b_type
;
819 else if (size
== 'h')
820 val_type
= examine_h_type
;
821 else if (size
== 'w')
822 val_type
= examine_w_type
;
823 else if (size
== 'g')
824 val_type
= examine_g_type
;
831 if (format
== 's' || format
== 'i')
834 /* Print as many objects as specified in COUNT, at most maxelts per line,
835 with the address of the next one at the start of each line. */
840 print_address (next_address
, gdb_stdout
);
841 printf_filtered (":");
846 printf_filtered ("\t");
847 /* Note that print_formatted sets next_address for the next
849 last_examine_address
= next_address
;
851 if (last_examine_value
)
852 value_free (last_examine_value
);
854 /* The value to be displayed is not fetched greedily.
855 Instead, to avoid the posibility of a fetched value not
856 being used, its retreval is delayed until the print code
857 uses it. When examining an instruction stream, the
858 disassembler will perform its own memory fetch using just
859 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
860 the disassembler be modified so that LAST_EXAMINE_VALUE
861 is left with the byte sequence from the last complete
862 instruction fetched from memory? */
863 last_examine_value
= value_at_lazy (val_type
, next_address
, sect
);
865 if (last_examine_value
)
866 release_value (last_examine_value
);
868 print_formatted (last_examine_value
, format
, size
, gdb_stdout
);
870 printf_filtered ("\n");
871 gdb_flush (gdb_stdout
);
876 validate_format (struct format_data fmt
, char *cmdname
)
879 error ("Size letters are meaningless in \"%s\" command.", cmdname
);
881 error ("Item count other than 1 is meaningless in \"%s\" command.",
883 if (fmt
.format
== 'i' || fmt
.format
== 's')
884 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
885 fmt
.format
, cmdname
);
888 /* Evaluate string EXP as an expression in the current language and
889 print the resulting value. EXP may contain a format specifier as the
890 first argument ("/x myvar" for example, to print myvar in hex).
894 print_command_1 (char *exp
, int inspect
, int voidprint
)
896 struct expression
*expr
;
897 register struct cleanup
*old_chain
= 0;
898 register char format
= 0;
900 struct format_data fmt
;
903 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
904 inspect_it
= inspect
;
906 if (exp
&& *exp
== '/')
909 fmt
= decode_format (&exp
, last_format
, 0);
910 validate_format (fmt
, "print");
911 last_format
= format
= fmt
.format
;
923 expr
= parse_expression (exp
);
924 old_chain
= make_cleanup (free_current_contents
, &expr
);
926 val
= evaluate_expression (expr
);
929 val
= access_value_history (0);
931 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
932 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
934 int histindex
= record_latest_value (val
);
937 annotate_value_history_begin (histindex
, VALUE_TYPE (val
));
939 annotate_value_begin (VALUE_TYPE (val
));
942 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
943 else if (histindex
>= 0)
944 printf_filtered ("$%d = ", histindex
);
947 annotate_value_history_value ();
949 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
950 printf_filtered ("\n");
953 annotate_value_history_end ();
955 annotate_value_end ();
958 printf_unfiltered ("\") )\030");
962 do_cleanups (old_chain
);
963 inspect_it
= 0; /* Reset print routines to normal */
968 print_command (char *exp
, int from_tty
)
970 print_command_1 (exp
, 0, 1);
973 /* Same as print, except in epoch, it gets its own window */
976 inspect_command (char *exp
, int from_tty
)
978 extern int epoch_interface
;
980 print_command_1 (exp
, epoch_interface
, 1);
983 /* Same as print, except it doesn't print void results. */
986 call_command (char *exp
, int from_tty
)
988 print_command_1 (exp
, 0, 0);
993 output_command (char *exp
, int from_tty
)
995 struct expression
*expr
;
996 register struct cleanup
*old_chain
;
997 register char format
= 0;
999 struct format_data fmt
;
1001 if (exp
&& *exp
== '/')
1004 fmt
= decode_format (&exp
, 0, 0);
1005 validate_format (fmt
, "output");
1006 format
= fmt
.format
;
1009 expr
= parse_expression (exp
);
1010 old_chain
= make_cleanup (free_current_contents
, &expr
);
1012 val
= evaluate_expression (expr
);
1014 annotate_value_begin (VALUE_TYPE (val
));
1016 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
1018 annotate_value_end ();
1021 gdb_flush (gdb_stdout
);
1023 do_cleanups (old_chain
);
1028 set_command (char *exp
, int from_tty
)
1030 struct expression
*expr
= parse_expression (exp
);
1031 register struct cleanup
*old_chain
=
1032 make_cleanup (free_current_contents
, &expr
);
1033 evaluate_expression (expr
);
1034 do_cleanups (old_chain
);
1039 sym_info (char *arg
, int from_tty
)
1041 struct minimal_symbol
*msymbol
;
1042 struct objfile
*objfile
;
1043 struct obj_section
*osect
;
1045 CORE_ADDR addr
, sect_addr
;
1047 unsigned int offset
;
1050 error_no_arg ("address");
1052 addr
= parse_and_eval_address (arg
);
1053 ALL_OBJSECTIONS (objfile
, osect
)
1055 sect
= osect
->the_bfd_section
;
1056 sect_addr
= overlay_mapped_address (addr
, sect
);
1058 if (osect
->addr
<= sect_addr
&& sect_addr
< osect
->endaddr
&&
1059 (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, sect
)))
1062 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1064 printf_filtered ("%s + %u in ",
1065 SYMBOL_SOURCE_NAME (msymbol
), offset
);
1067 printf_filtered ("%s in ",
1068 SYMBOL_SOURCE_NAME (msymbol
));
1069 if (pc_in_unmapped_range (addr
, sect
))
1070 printf_filtered ("load address range of ");
1071 if (section_is_overlay (sect
))
1072 printf_filtered ("%s overlay ",
1073 section_is_mapped (sect
) ? "mapped" : "unmapped");
1074 printf_filtered ("section %s", sect
->name
);
1075 printf_filtered ("\n");
1079 printf_filtered ("No symbol matches %s.\n", arg
);
1084 address_info (char *exp
, int from_tty
)
1086 register struct symbol
*sym
;
1087 register struct minimal_symbol
*msymbol
;
1089 register long basereg
;
1091 CORE_ADDR load_addr
;
1092 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1093 if exp is a field of `this'. */
1096 error ("Argument required.");
1098 sym
= lookup_symbol (exp
, get_selected_block (0), VAR_NAMESPACE
,
1099 &is_a_field_of_this
, (struct symtab
**) NULL
);
1102 if (is_a_field_of_this
)
1104 printf_filtered ("Symbol \"");
1105 fprintf_symbol_filtered (gdb_stdout
, exp
,
1106 current_language
->la_language
, DMGL_ANSI
);
1107 printf_filtered ("\" is a field of the local class variable `this'\n");
1111 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1113 if (msymbol
!= NULL
)
1115 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1117 printf_filtered ("Symbol \"");
1118 fprintf_symbol_filtered (gdb_stdout
, exp
,
1119 current_language
->la_language
, DMGL_ANSI
);
1120 printf_filtered ("\" is at ");
1121 print_address_numeric (load_addr
, 1, gdb_stdout
);
1122 printf_filtered (" in a file compiled without debugging");
1123 section
= SYMBOL_BFD_SECTION (msymbol
);
1124 if (section_is_overlay (section
))
1126 load_addr
= overlay_unmapped_address (load_addr
, section
);
1127 printf_filtered (",\n -- loaded at ");
1128 print_address_numeric (load_addr
, 1, gdb_stdout
);
1129 printf_filtered (" in overlay section %s", section
->name
);
1131 printf_filtered (".\n");
1134 error ("No symbol \"%s\" in current context.", exp
);
1138 printf_filtered ("Symbol \"");
1139 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_NAME (sym
),
1140 current_language
->la_language
, DMGL_ANSI
);
1141 printf_filtered ("\" is ");
1142 val
= SYMBOL_VALUE (sym
);
1143 basereg
= SYMBOL_BASEREG (sym
);
1144 section
= SYMBOL_BFD_SECTION (sym
);
1146 switch (SYMBOL_CLASS (sym
))
1149 case LOC_CONST_BYTES
:
1150 printf_filtered ("constant");
1154 printf_filtered ("a label at address ");
1155 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1157 if (section_is_overlay (section
))
1159 load_addr
= overlay_unmapped_address (load_addr
, section
);
1160 printf_filtered (",\n -- loaded at ");
1161 print_address_numeric (load_addr
, 1, gdb_stdout
);
1162 printf_filtered (" in overlay section %s", section
->name
);
1167 printf_filtered ("a variable in register %s", REGISTER_NAME (val
));
1171 printf_filtered ("static storage at address ");
1172 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1174 if (section_is_overlay (section
))
1176 load_addr
= overlay_unmapped_address (load_addr
, section
);
1177 printf_filtered (",\n -- loaded at ");
1178 print_address_numeric (load_addr
, 1, gdb_stdout
);
1179 printf_filtered (" in overlay section %s", section
->name
);
1184 printf_filtered ("external global (indirect addressing), at address *(");
1185 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1187 printf_filtered (")");
1188 if (section_is_overlay (section
))
1190 load_addr
= overlay_unmapped_address (load_addr
, section
);
1191 printf_filtered (",\n -- loaded at ");
1192 print_address_numeric (load_addr
, 1, gdb_stdout
);
1193 printf_filtered (" in overlay section %s", section
->name
);
1198 printf_filtered ("an argument in register %s", REGISTER_NAME (val
));
1201 case LOC_REGPARM_ADDR
:
1202 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val
));
1206 printf_filtered ("an argument at offset %ld", val
);
1210 printf_filtered ("an argument at frame offset %ld", val
);
1214 printf_filtered ("a local variable at frame offset %ld", val
);
1218 printf_filtered ("a reference argument at offset %ld", val
);
1222 printf_filtered ("a variable at offset %ld from register %s",
1223 val
, REGISTER_NAME (basereg
));
1226 case LOC_BASEREG_ARG
:
1227 printf_filtered ("an argument at offset %ld from register %s",
1228 val
, REGISTER_NAME (basereg
));
1232 printf_filtered ("a typedef");
1236 printf_filtered ("a function at address ");
1237 #ifdef GDB_TARGET_MASK_DISAS_PC
1238 print_address_numeric
1239 (load_addr
= GDB_TARGET_MASK_DISAS_PC (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
))),
1242 print_address_numeric (load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
1245 if (section_is_overlay (section
))
1247 load_addr
= overlay_unmapped_address (load_addr
, section
);
1248 printf_filtered (",\n -- loaded at ");
1249 print_address_numeric (load_addr
, 1, gdb_stdout
);
1250 printf_filtered (" in overlay section %s", section
->name
);
1254 case LOC_UNRESOLVED
:
1256 struct minimal_symbol
*msym
;
1258 msym
= lookup_minimal_symbol (SYMBOL_NAME (sym
), NULL
, NULL
);
1260 printf_filtered ("unresolved");
1263 section
= SYMBOL_BFD_SECTION (msym
);
1264 printf_filtered ("static storage at address ");
1265 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (msym
),
1267 if (section_is_overlay (section
))
1269 load_addr
= overlay_unmapped_address (load_addr
, section
);
1270 printf_filtered (",\n -- loaded at ");
1271 print_address_numeric (load_addr
, 1, gdb_stdout
);
1272 printf_filtered (" in overlay section %s", section
->name
);
1278 case LOC_THREAD_LOCAL_STATIC
:
1280 "a thread-local variable at offset %ld from the thread base register %s",
1281 val
, REGISTER_NAME (basereg
));
1284 case LOC_OPTIMIZED_OUT
:
1285 printf_filtered ("optimized out");
1289 printf_filtered ("of unknown (botched) type");
1292 printf_filtered (".\n");
1296 x_command (char *exp
, int from_tty
)
1298 struct expression
*expr
;
1299 struct format_data fmt
;
1300 struct cleanup
*old_chain
;
1303 fmt
.format
= last_format
;
1304 fmt
.size
= last_size
;
1307 if (exp
&& *exp
== '/')
1310 fmt
= decode_format (&exp
, last_format
, last_size
);
1313 /* If we have an expression, evaluate it and use it as the address. */
1315 if (exp
!= 0 && *exp
!= 0)
1317 expr
= parse_expression (exp
);
1318 /* Cause expression not to be there any more
1319 if this command is repeated with Newline.
1320 But don't clobber a user-defined command's definition. */
1323 old_chain
= make_cleanup (free_current_contents
, &expr
);
1324 val
= evaluate_expression (expr
);
1325 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1326 val
= value_ind (val
);
1327 /* In rvalue contexts, such as this, functions are coerced into
1328 pointers to functions. This makes "x/i main" work. */
1329 if (/* last_format == 'i' && */
1330 TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1331 && VALUE_LVAL (val
) == lval_memory
)
1332 next_address
= VALUE_ADDRESS (val
);
1334 next_address
= value_as_address (val
);
1335 if (VALUE_BFD_SECTION (val
))
1336 next_section
= VALUE_BFD_SECTION (val
);
1337 do_cleanups (old_chain
);
1340 do_examine (fmt
, next_address
, next_section
);
1342 /* If the examine succeeds, we remember its size and format for next time. */
1343 last_size
= fmt
.size
;
1344 last_format
= fmt
.format
;
1346 /* Set a couple of internal variables if appropriate. */
1347 if (last_examine_value
)
1349 /* Make last address examined available to the user as $_. Use
1350 the correct pointer type. */
1351 struct type
*pointer_type
1352 = lookup_pointer_type (VALUE_TYPE (last_examine_value
));
1353 set_internalvar (lookup_internalvar ("_"),
1354 value_from_pointer (pointer_type
,
1355 last_examine_address
));
1357 /* Make contents of last address examined available to the user as $__. */
1358 /* If the last value has not been fetched from memory then don't
1359 fetch it now - instead mark it by voiding the $__ variable. */
1360 if (VALUE_LAZY (last_examine_value
))
1361 set_internalvar (lookup_internalvar ("__"),
1362 allocate_value (builtin_type_void
));
1364 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1369 /* Add an expression to the auto-display chain.
1370 Specify the expression. */
1373 display_command (char *exp
, int from_tty
)
1375 struct format_data fmt
;
1376 register struct expression
*expr
;
1377 register struct display
*new;
1381 if (tui_version
&& *exp
== '$')
1382 display_it
= (tui_set_layout (exp
) == TUI_FAILURE
);
1396 fmt
= decode_format (&exp
, 0, 0);
1397 if (fmt
.size
&& fmt
.format
== 0)
1399 if (fmt
.format
== 'i' || fmt
.format
== 's')
1409 innermost_block
= 0;
1410 expr
= parse_expression (exp
);
1412 new = (struct display
*) xmalloc (sizeof (struct display
));
1415 new->block
= innermost_block
;
1416 new->next
= display_chain
;
1417 new->number
= ++display_number
;
1420 display_chain
= new;
1422 if (from_tty
&& target_has_execution
)
1423 do_one_display (new);
1430 free_display (struct display
*d
)
1436 /* Clear out the display_chain.
1437 Done when new symtabs are loaded, since this invalidates
1438 the types stored in many expressions. */
1441 clear_displays (void)
1443 register struct display
*d
;
1445 while ((d
= display_chain
) != NULL
)
1448 display_chain
= d
->next
;
1453 /* Delete the auto-display number NUM. */
1456 delete_display (int num
)
1458 register struct display
*d1
, *d
;
1461 error ("No display number %d.", num
);
1463 if (display_chain
->number
== num
)
1466 display_chain
= d1
->next
;
1470 for (d
= display_chain
;; d
= d
->next
)
1473 error ("No display number %d.", num
);
1474 if (d
->next
->number
== num
)
1484 /* Delete some values from the auto-display chain.
1485 Specify the element numbers. */
1488 undisplay_command (char *args
, int from_tty
)
1490 register char *p
= args
;
1496 if (query ("Delete all auto-display expressions? "))
1505 while (*p1
>= '0' && *p1
<= '9')
1507 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1508 error ("Arguments must be display numbers.");
1512 delete_display (num
);
1515 while (*p
== ' ' || *p
== '\t')
1521 /* Display a single auto-display.
1522 Do nothing if the display cannot be printed in the current context,
1523 or if the display is disabled. */
1526 do_one_display (struct display
*d
)
1528 int within_current_scope
;
1530 if (d
->enabled_p
== 0)
1534 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1536 within_current_scope
= 1;
1537 if (!within_current_scope
)
1540 current_display_number
= d
->number
;
1542 annotate_display_begin ();
1543 printf_filtered ("%d", d
->number
);
1544 annotate_display_number_end ();
1545 printf_filtered (": ");
1551 annotate_display_format ();
1553 printf_filtered ("x/");
1554 if (d
->format
.count
!= 1)
1555 printf_filtered ("%d", d
->format
.count
);
1556 printf_filtered ("%c", d
->format
.format
);
1557 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1558 printf_filtered ("%c", d
->format
.size
);
1559 printf_filtered (" ");
1561 annotate_display_expression ();
1563 print_expression (d
->exp
, gdb_stdout
);
1564 annotate_display_expression_end ();
1566 if (d
->format
.count
!= 1)
1567 printf_filtered ("\n");
1569 printf_filtered (" ");
1571 val
= evaluate_expression (d
->exp
);
1572 addr
= value_as_address (val
);
1573 if (d
->format
.format
== 'i')
1574 addr
= ADDR_BITS_REMOVE (addr
);
1576 annotate_display_value ();
1578 do_examine (d
->format
, addr
, VALUE_BFD_SECTION (val
));
1582 annotate_display_format ();
1584 if (d
->format
.format
)
1585 printf_filtered ("/%c ", d
->format
.format
);
1587 annotate_display_expression ();
1589 print_expression (d
->exp
, gdb_stdout
);
1590 annotate_display_expression_end ();
1592 printf_filtered (" = ");
1594 annotate_display_expression ();
1596 print_formatted (evaluate_expression (d
->exp
),
1597 d
->format
.format
, d
->format
.size
, gdb_stdout
);
1598 printf_filtered ("\n");
1601 annotate_display_end ();
1603 gdb_flush (gdb_stdout
);
1604 current_display_number
= -1;
1607 /* Display all of the values on the auto-display chain which can be
1608 evaluated in the current scope. */
1613 register struct display
*d
;
1615 for (d
= display_chain
; d
; d
= d
->next
)
1619 /* Delete the auto-display which we were in the process of displaying.
1620 This is done when there is an error or a signal. */
1623 disable_display (int num
)
1625 register struct display
*d
;
1627 for (d
= display_chain
; d
; d
= d
->next
)
1628 if (d
->number
== num
)
1633 printf_unfiltered ("No display number %d.\n", num
);
1637 disable_current_display (void)
1639 if (current_display_number
>= 0)
1641 disable_display (current_display_number
);
1642 fprintf_unfiltered (gdb_stderr
, "Disabling display %d to avoid infinite recursion.\n",
1643 current_display_number
);
1645 current_display_number
= -1;
1649 display_info (char *ignore
, int from_tty
)
1651 register struct display
*d
;
1654 printf_unfiltered ("There are no auto-display expressions now.\n");
1656 printf_filtered ("Auto-display expressions now in effect:\n\
1657 Num Enb Expression\n");
1659 for (d
= display_chain
; d
; d
= d
->next
)
1661 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1663 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1665 else if (d
->format
.format
)
1666 printf_filtered ("/%c ", d
->format
.format
);
1667 print_expression (d
->exp
, gdb_stdout
);
1668 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1669 printf_filtered (" (cannot be evaluated in the current context)");
1670 printf_filtered ("\n");
1671 gdb_flush (gdb_stdout
);
1676 enable_display (char *args
, int from_tty
)
1678 register char *p
= args
;
1681 register struct display
*d
;
1685 for (d
= display_chain
; d
; d
= d
->next
)
1692 while (*p1
>= '0' && *p1
<= '9')
1694 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1695 error ("Arguments must be display numbers.");
1699 for (d
= display_chain
; d
; d
= d
->next
)
1700 if (d
->number
== num
)
1705 printf_unfiltered ("No display number %d.\n", num
);
1708 while (*p
== ' ' || *p
== '\t')
1715 disable_display_command (char *args
, int from_tty
)
1717 register char *p
= args
;
1719 register struct display
*d
;
1723 for (d
= display_chain
; d
; d
= d
->next
)
1730 while (*p1
>= '0' && *p1
<= '9')
1732 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1733 error ("Arguments must be display numbers.");
1735 disable_display (atoi (p
));
1738 while (*p
== ' ' || *p
== '\t')
1744 /* Print the value in stack frame FRAME of a variable
1745 specified by a struct symbol. */
1748 print_variable_value (struct symbol
*var
, struct frame_info
*frame
,
1749 struct ui_file
*stream
)
1751 struct value
*val
= read_var_value (var
, frame
);
1753 value_print (val
, stream
, 0, Val_pretty_default
);
1756 /* Print the arguments of a stack frame, given the function FUNC
1757 running in that frame (as a symbol), the info on the frame,
1758 and the number of args according to the stack frame (or -1 if unknown). */
1760 /* References here and elsewhere to "number of args according to the
1761 stack frame" appear in all cases to refer to "number of ints of args
1762 according to the stack frame". At least for VAX, i386, isi. */
1765 print_frame_args (struct symbol
*func
, struct frame_info
*fi
, int num
,
1766 struct ui_file
*stream
)
1768 struct block
*b
= NULL
;
1771 register struct symbol
*sym
;
1773 /* Offset of next stack argument beyond the one we have seen that is
1774 at the highest offset.
1775 -1 if we haven't come to a stack argument yet. */
1776 long highest_offset
= -1;
1778 /* Number of ints of arguments that we have printed so far. */
1779 int args_printed
= 0;
1780 struct cleanup
*old_chain
, *list_chain
;
1781 struct ui_stream
*stb
;
1783 stb
= ui_out_stream_new (uiout
);
1784 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1788 b
= SYMBOL_BLOCK_VALUE (func
);
1789 /* Function blocks are order sensitive, and thus should not be
1791 gdb_assert (BLOCK_HASHTABLE (b
) == 0);
1793 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1797 /* Keep track of the highest stack argument offset seen, and
1798 skip over any kinds of symbols we don't care about. */
1800 switch (SYMBOL_CLASS (sym
))
1805 long current_offset
= SYMBOL_VALUE (sym
);
1806 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1808 /* Compute address of next argument by adding the size of
1809 this argument and rounding to an int boundary. */
1811 ((current_offset
+ arg_size
+ sizeof (int) - 1)
1812 & ~(sizeof (int) - 1));
1814 /* If this is the highest offset seen yet, set highest_offset. */
1815 if (highest_offset
== -1
1816 || (current_offset
> highest_offset
))
1817 highest_offset
= current_offset
;
1819 /* Add the number of ints we're about to print to args_printed. */
1820 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1823 /* We care about types of symbols, but don't need to keep track of
1824 stack offsets in them. */
1826 case LOC_REGPARM_ADDR
:
1828 case LOC_BASEREG_ARG
:
1831 /* Other types of symbols we just skip over. */
1836 /* We have to look up the symbol because arguments can have
1837 two entries (one a parameter, one a local) and the one we
1838 want is the local, which lookup_symbol will find for us.
1839 This includes gcc1 (not gcc2) on the sparc when passing a
1840 small structure and gcc2 when the argument type is float
1841 and it is passed as a double and converted to float by
1842 the prologue (in the latter case the type of the LOC_ARG
1843 symbol is double and the type of the LOC_LOCAL symbol is
1845 /* But if the parameter name is null, don't try it.
1846 Null parameter names occur on the RS/6000, for traceback tables.
1847 FIXME, should we even print them? */
1849 if (*SYMBOL_NAME (sym
))
1851 struct symbol
*nsym
;
1852 nsym
= lookup_symbol
1854 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1855 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
1857 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
1858 it was passed on the stack and loaded into a register,
1859 or passed in a register and stored in a stack slot.
1860 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
1862 Reasons for using the LOC_ARG:
1863 (1) because find_saved_registers may be slow for remote
1865 (2) because registers are often re-used and stack slots
1866 rarely (never?) are. Therefore using the stack slot is
1867 much less likely to print garbage.
1869 Reasons why we might want to use the LOC_REGISTER:
1870 (1) So that the backtrace prints the same value as
1871 "print foo". I see no compelling reason why this needs
1872 to be the case; having the backtrace print the value which
1873 was passed in, and "print foo" print the value as modified
1874 within the called function, makes perfect sense to me.
1876 Additional note: It might be nice if "info args" displayed
1878 One more note: There is a case with sparc structure passing
1879 where we need to use the LOC_REGISTER, but this is dealt with
1880 by creating a single LOC_REGPARM in symbol reading. */
1882 /* Leave sym (the LOC_ARG) alone. */
1889 /* Print the current arg. */
1891 ui_out_text (uiout
, ", ");
1892 ui_out_wrap_hint (uiout
, " ");
1894 annotate_arg_begin ();
1896 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
1897 fprintf_symbol_filtered (stb
->stream
, SYMBOL_SOURCE_NAME (sym
),
1898 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1899 ui_out_field_stream (uiout
, "name", stb
);
1900 annotate_arg_name_end ();
1901 ui_out_text (uiout
, "=");
1903 /* Avoid value_print because it will deref ref parameters. We just
1904 want to print their addresses. Print ??? for args whose address
1905 we do not know. We pass 2 as "recurse" to val_print because our
1906 standard indentation here is 4 spaces, and val_print indents
1907 2 for each recurse. */
1908 val
= read_var_value (sym
, fi
);
1910 annotate_arg_value (val
== NULL
? NULL
: VALUE_TYPE (val
));
1914 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
1915 VALUE_ADDRESS (val
),
1916 stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
1917 ui_out_field_stream (uiout
, "value", stb
);
1920 ui_out_text (uiout
, "???");
1922 /* Invoke ui_out_tuple_end. */
1923 do_cleanups (list_chain
);
1925 annotate_arg_end ();
1931 /* Don't print nameless args in situations where we don't know
1932 enough about the stack to find them. */
1937 if (highest_offset
== -1)
1938 start
= FRAME_ARGS_SKIP
;
1940 start
= highest_offset
;
1942 print_frame_nameless_args (fi
, start
, num
- args_printed
,
1945 do_cleanups (old_chain
);
1948 /* Print nameless args on STREAM.
1949 FI is the frameinfo for this frame, START is the offset
1950 of the first nameless arg, and NUM is the number of nameless args to
1951 print. FIRST is nonzero if this is the first argument (not just
1952 the first nameless arg). */
1955 print_frame_nameless_args (struct frame_info
*fi
, long start
, int num
,
1956 int first
, struct ui_file
*stream
)
1962 for (i
= 0; i
< num
; i
++)
1965 #ifdef NAMELESS_ARG_VALUE
1966 NAMELESS_ARG_VALUE (fi
, start
, &arg_value
);
1968 argsaddr
= FRAME_ARGS_ADDRESS (fi
);
1972 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
1976 fprintf_filtered (stream
, ", ");
1978 #ifdef PRINT_NAMELESS_INTEGER
1979 PRINT_NAMELESS_INTEGER (stream
, arg_value
);
1981 #ifdef PRINT_TYPELESS_INTEGER
1982 PRINT_TYPELESS_INTEGER (stream
, builtin_type_int
, (LONGEST
) arg_value
);
1984 fprintf_filtered (stream
, "%ld", arg_value
);
1985 #endif /* PRINT_TYPELESS_INTEGER */
1986 #endif /* PRINT_NAMELESS_INTEGER */
1988 start
+= sizeof (int);
1994 printf_command (char *arg
, int from_tty
)
1996 register char *f
= NULL
;
1997 register char *s
= arg
;
1998 char *string
= NULL
;
1999 struct value
**val_args
;
2001 char *current_substring
;
2003 int allocated_args
= 20;
2004 struct cleanup
*old_cleanups
;
2006 val_args
= (struct value
**) xmalloc (allocated_args
2007 * sizeof (struct value
*));
2008 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2011 error_no_arg ("format-control string and values to print");
2013 /* Skip white space before format string */
2014 while (*s
== ' ' || *s
== '\t')
2017 /* A format string should follow, enveloped in double quotes */
2019 error ("Bad format string, missing '\"'.");
2021 /* Parse the format-control string and copy it into the string STRING,
2022 processing some kinds of escape sequence. */
2024 f
= string
= (char *) alloca (strlen (s
) + 1);
2032 error ("Bad format string, non-terminated '\"'.");
2065 /* ??? TODO: handle other escape sequences */
2066 error ("Unrecognized escape character \\%c in format string.",
2076 /* Skip over " and following space and comma. */
2079 while (*s
== ' ' || *s
== '\t')
2082 if (*s
!= ',' && *s
!= 0)
2083 error ("Invalid argument syntax");
2087 while (*s
== ' ' || *s
== '\t')
2090 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2091 substrings
= alloca (strlen (string
) * 2);
2092 current_substring
= substrings
;
2095 /* Now scan the string for %-specs and see what kinds of args they want.
2096 argclass[I] classifies the %-specs so we can give printf_filtered
2097 something of the right size. */
2101 no_arg
, int_arg
, string_arg
, double_arg
, long_long_arg
2103 enum argclass
*argclass
;
2104 enum argclass this_argclass
;
2110 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2118 while (strchr ("0123456789.hlL-+ #", *f
))
2120 if (*f
== 'l' || *f
== 'L')
2127 this_argclass
= string_arg
;
2133 this_argclass
= double_arg
;
2137 error ("`*' not supported for precision or width in printf");
2140 error ("Format specifier `n' not supported in printf");
2143 this_argclass
= no_arg
;
2148 this_argclass
= long_long_arg
;
2150 this_argclass
= int_arg
;
2154 if (this_argclass
!= no_arg
)
2156 strncpy (current_substring
, last_arg
, f
- last_arg
);
2157 current_substring
+= f
- last_arg
;
2158 *current_substring
++ = '\0';
2160 argclass
[nargs_wanted
++] = this_argclass
;
2164 /* Now, parse all arguments and evaluate them.
2165 Store the VALUEs in VAL_ARGS. */
2170 if (nargs
== allocated_args
)
2171 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2172 (allocated_args
*= 2)
2173 * sizeof (struct value
*));
2175 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2177 /* If format string wants a float, unchecked-convert the value to
2178 floating point of the same size */
2180 if (argclass
[nargs
] == double_arg
)
2182 struct type
*type
= VALUE_TYPE (val_args
[nargs
]);
2183 if (TYPE_LENGTH (type
) == sizeof (float))
2184 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
2185 if (TYPE_LENGTH (type
) == sizeof (double))
2186 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
2194 if (nargs
!= nargs_wanted
)
2195 error ("Wrong number of arguments for specified format-string");
2197 /* Now actually print them. */
2198 current_substring
= substrings
;
2199 for (i
= 0; i
< nargs
; i
++)
2201 switch (argclass
[i
])
2208 tem
= value_as_address (val_args
[i
]);
2210 /* This is a %s argument. Find the length of the string. */
2215 read_memory (tem
+ j
, &c
, 1);
2220 /* Copy the string contents into a string inside GDB. */
2221 str
= (char *) alloca (j
+ 1);
2223 read_memory (tem
, str
, j
);
2226 printf_filtered (current_substring
, str
);
2231 double val
= value_as_double (val_args
[i
]);
2232 printf_filtered (current_substring
, val
);
2236 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2238 long long val
= value_as_long (val_args
[i
]);
2239 printf_filtered (current_substring
, val
);
2243 error ("long long not supported in printf");
2247 /* FIXME: there should be separate int_arg and long_arg. */
2248 long val
= value_as_long (val_args
[i
]);
2249 printf_filtered (current_substring
, val
);
2252 default: /* purecov: deadcode */
2253 error ("internal error in printf_command"); /* purecov: deadcode */
2255 /* Skip to the next substring. */
2256 current_substring
+= strlen (current_substring
) + 1;
2258 /* Print the portion of the format string after the last argument. */
2259 printf_filtered (last_arg
);
2261 do_cleanups (old_cleanups
);
2264 /* Dump a specified section of assembly code. With no command line
2265 arguments, this command will dump the assembly code for the
2266 function surrounding the pc value in the selected frame. With one
2267 argument, it will dump the assembly code surrounding that pc value.
2268 Two arguments are interpeted as bounds within which to dump
2273 disassemble_command (char *arg
, int from_tty
)
2275 CORE_ADDR low
, high
;
2277 CORE_ADDR pc
, pc_masked
;
2286 if (!selected_frame
)
2287 error ("No frame selected.\n");
2289 pc
= get_frame_pc (selected_frame
);
2290 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2291 error ("No function contains program counter for selected frame.\n");
2293 else if (tui_version
)
2294 low
= tuiGetLowDisassemblyAddress (low
, pc
);
2296 low
+= FUNCTION_START_OFFSET
;
2298 else if (!(space_index
= (char *) strchr (arg
, ' ')))
2301 pc
= parse_and_eval_address (arg
);
2302 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2303 error ("No function contains specified address.\n");
2305 else if (tui_version
)
2306 low
= tuiGetLowDisassemblyAddress (low
, pc
);
2308 low
+= FUNCTION_START_OFFSET
;
2312 /* Two arguments. */
2313 *space_index
= '\0';
2314 low
= parse_and_eval_address (arg
);
2315 high
= parse_and_eval_address (space_index
+ 1);
2319 if (!tui_is_window_visible (DISASSEM_WIN
))
2322 printf_filtered ("Dump of assembler code ");
2325 printf_filtered ("for function %s:\n", name
);
2329 printf_filtered ("from ");
2330 print_address_numeric (low
, 1, gdb_stdout
);
2331 printf_filtered (" to ");
2332 print_address_numeric (high
, 1, gdb_stdout
);
2333 printf_filtered (":\n");
2336 /* Dump the specified range. */
2339 #ifdef GDB_TARGET_MASK_DISAS_PC
2340 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2345 while (pc_masked
< high
)
2348 print_address (pc_masked
, gdb_stdout
);
2349 printf_filtered (":\t");
2350 /* We often wrap here if there are long symbolic names. */
2352 pc
+= print_insn (pc
, gdb_stdout
);
2353 printf_filtered ("\n");
2355 #ifdef GDB_TARGET_MASK_DISAS_PC
2356 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2361 printf_filtered ("End of assembler dump.\n");
2362 gdb_flush (gdb_stdout
);
2367 tui_show_assembly (low
);
2372 /* Print the instruction at address MEMADDR in debugged memory,
2373 on STREAM. Returns length of the instruction, in bytes. */
2376 print_insn (CORE_ADDR memaddr
, struct ui_file
*stream
)
2378 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
2379 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_BIG
;
2381 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_LITTLE
;
2383 if (TARGET_ARCHITECTURE
!= NULL
)
2384 TARGET_PRINT_INSN_INFO
->mach
= TARGET_ARCHITECTURE
->mach
;
2385 /* else: should set .mach=0 but some disassemblers don't grok this */
2387 TARGET_PRINT_INSN_INFO
->stream
= stream
;
2389 return TARGET_PRINT_INSN (memaddr
, TARGET_PRINT_INSN_INFO
);
2394 _initialize_printcmd (void)
2396 struct cmd_list_element
*c
;
2398 current_display_number
= -1;
2400 add_info ("address", address_info
,
2401 "Describe where symbol SYM is stored.");
2403 add_info ("symbol", sym_info
,
2404 "Describe what symbol is at location ADDR.\n\
2405 Only for symbols with fixed locations (global or static scope).");
2407 add_com ("x", class_vars
, x_command
,
2408 concat ("Examine memory: x/FMT ADDRESS.\n\
2409 ADDRESS is an expression for the memory address to examine.\n\
2410 FMT is a repeat count followed by a format letter and a size letter.\n\
2411 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2412 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2413 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2414 The specified number of objects of the specified size are printed\n\
2415 according to the format.\n\n\
2416 Defaults for format and size letters are those previously used.\n\
2417 Default count is 1. Default address is following last thing printed\n\
2418 with this command or \"print\".", NULL
));
2420 c
= add_com ("disassemble", class_vars
, disassemble_command
,
2421 "Disassemble a specified section of memory.\n\
2422 Default is the function surrounding the pc of the selected frame.\n\
2423 With a single argument, the function surrounding that address is dumped.\n\
2424 Two arguments are taken as a range of memory to dump.");
2425 set_cmd_completer (c
, location_completer
);
2427 add_com_alias ("va", "disassemble", class_xdb
, 0);
2430 add_com ("whereis", class_vars
, whereis_command
,
2431 "Print line number and file of definition of variable.");
2434 add_info ("display", display_info
,
2435 "Expressions to display when program stops, with code numbers.");
2437 add_cmd ("undisplay", class_vars
, undisplay_command
,
2438 "Cancel some expressions to be displayed when program stops.\n\
2439 Arguments are the code numbers of the expressions to stop displaying.\n\
2440 No argument means cancel all automatic-display expressions.\n\
2441 \"delete display\" has the same effect as this command.\n\
2442 Do \"info display\" to see current list of code numbers.",
2445 add_com ("display", class_vars
, display_command
,
2446 "Print value of expression EXP each time the program stops.\n\
2447 /FMT may be used before EXP as in the \"print\" command.\n\
2448 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2449 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2450 and examining is done as in the \"x\" command.\n\n\
2451 With no argument, display all currently requested auto-display expressions.\n\
2452 Use \"undisplay\" to cancel display requests previously made."
2455 add_cmd ("display", class_vars
, enable_display
,
2456 "Enable some expressions to be displayed when program stops.\n\
2457 Arguments are the code numbers of the expressions to resume displaying.\n\
2458 No argument means enable all automatic-display expressions.\n\
2459 Do \"info display\" to see current list of code numbers.", &enablelist
);
2461 add_cmd ("display", class_vars
, disable_display_command
,
2462 "Disable some expressions to be displayed when program stops.\n\
2463 Arguments are the code numbers of the expressions to stop displaying.\n\
2464 No argument means disable all automatic-display expressions.\n\
2465 Do \"info display\" to see current list of code numbers.", &disablelist
);
2467 add_cmd ("display", class_vars
, undisplay_command
,
2468 "Cancel some expressions to be displayed when program stops.\n\
2469 Arguments are the code numbers of the expressions to stop displaying.\n\
2470 No argument means cancel all automatic-display expressions.\n\
2471 Do \"info display\" to see current list of code numbers.", &deletelist
);
2473 add_com ("printf", class_vars
, printf_command
,
2474 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2475 This is useful for formatted output in user-defined commands.");
2477 add_com ("output", class_vars
, output_command
,
2478 "Like \"print\" but don't put in value history and don't print newline.\n\
2479 This is useful in user-defined commands.");
2481 add_prefix_cmd ("set", class_vars
, set_command
,
2482 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2483 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2484 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2485 with $), a register (a few standard names starting with $), or an actual\n\
2486 variable in the program being debugged. EXP is any valid expression.\n",
2487 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2488 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2489 You can see these environment settings with the \"show\" command.", NULL
),
2490 &setlist
, "set ", 1, &cmdlist
);
2492 add_com ("assign", class_vars
, set_command
, concat ("Evaluate expression \
2493 EXP and assign result to variable VAR, using assignment\n\
2494 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2495 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2496 with $), a register (a few standard names starting with $), or an actual\n\
2497 variable in the program being debugged. EXP is any valid expression.\n",
2498 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2499 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2500 You can see these environment settings with the \"show\" command.", NULL
));
2502 /* "call" is the same as "set", but handy for dbx users to call fns. */
2503 c
= add_com ("call", class_vars
, call_command
,
2504 "Call a function in the program.\n\
2505 The argument is the function name and arguments, in the notation of the\n\
2506 current working language. The result is printed and saved in the value\n\
2507 history, if it is not void.");
2508 set_cmd_completer (c
, location_completer
);
2510 add_cmd ("variable", class_vars
, set_command
,
2511 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2512 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2513 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2514 with $), a register (a few standard names starting with $), or an actual\n\
2515 variable in the program being debugged. EXP is any valid expression.\n\
2516 This may usually be abbreviated to simply \"set\".",
2519 c
= add_com ("print", class_vars
, print_command
,
2520 concat ("Print value of expression EXP.\n\
2521 Variables accessible are those of the lexical environment of the selected\n\
2522 stack frame, plus all those whose scope is global or an entire file.\n\
2524 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2525 $$NUM refers to NUM'th value back from the last one.\n\
2526 Names starting with $ refer to registers (with the values they would have\n",
2527 "if the program were to return to the stack frame now selected, restoring\n\
2528 all registers saved by frames farther in) or else to debugger\n\
2529 \"convenience\" variables (any such name not a known register).\n\
2530 Use assignment expressions to give values to convenience variables.\n",
2532 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2533 @ is a binary operator for treating consecutive data objects\n\
2534 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2535 element is FOO, whose second element is stored in the space following\n\
2536 where FOO is stored, etc. FOO must be an expression whose value\n\
2537 resides in memory.\n",
2539 EXP may be preceded with /FMT, where FMT is a format letter\n\
2540 but no count or size letter (see \"x\" command).", NULL
));
2541 set_cmd_completer (c
, location_completer
);
2542 add_com_alias ("p", "print", class_vars
, 1);
2544 c
= add_com ("inspect", class_vars
, inspect_command
,
2545 "Same as \"print\" command, except that if you are running in the epoch\n\
2546 environment, the value is printed in its own window.");
2547 set_cmd_completer (c
, location_completer
);
2550 add_set_cmd ("max-symbolic-offset", no_class
, var_uinteger
,
2551 (char *) &max_symbolic_offset
,
2552 "Set the largest offset that will be printed in <symbol+1234> form.",
2556 add_set_cmd ("symbol-filename", no_class
, var_boolean
,
2557 (char *) &print_symbol_filename
,
2558 "Set printing of source filename and line number with <symbol>.",
2562 /* For examine/instruction a single byte quantity is specified as
2563 the data. This avoids problems with value_at_lazy() requiring a
2564 valid data type (and rejecting VOID). */
2565 examine_i_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_i_type", NULL
);
2567 examine_b_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_b_type", NULL
);
2568 examine_h_type
= init_type (TYPE_CODE_INT
, 2, 0, "examine_h_type", NULL
);
2569 examine_w_type
= init_type (TYPE_CODE_INT
, 4, 0, "examine_w_type", NULL
);
2570 examine_g_type
= init_type (TYPE_CODE_INT
, 8, 0, "examine_g_type", NULL
);