1 /* Print values for GNU debugger GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
30 #include "expression.h"
34 #include "breakpoint.h"
38 #include "symfile.h" /* for overlay functions */
39 #include "objfiles.h" /* ditto */
40 #include "completer.h" /* for completion functions */
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 is TARGET_ADDR_BIT, not
395 TYPE_LENGTH (type). */
396 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
397 len
= TARGET_ADDR_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
);
928 /* C++: figure out what type we actually want to print it as. */
929 type
= VALUE_TYPE (val
);
932 && (TYPE_CODE (type
) == TYPE_CODE_PTR
933 || TYPE_CODE (type
) == TYPE_CODE_REF
)
934 && (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_STRUCT
935 || TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_UNION
))
939 v
= value_from_vtable_info (val
, TYPE_TARGET_TYPE (type
));
943 type
= VALUE_TYPE (val
);
948 val
= access_value_history (0);
950 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
951 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
953 int histindex
= record_latest_value (val
);
956 annotate_value_history_begin (histindex
, VALUE_TYPE (val
));
958 annotate_value_begin (VALUE_TYPE (val
));
961 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
962 else if (histindex
>= 0)
963 printf_filtered ("$%d = ", histindex
);
966 annotate_value_history_value ();
968 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
969 printf_filtered ("\n");
972 annotate_value_history_end ();
974 annotate_value_end ();
977 printf_unfiltered ("\") )\030");
981 do_cleanups (old_chain
);
982 inspect_it
= 0; /* Reset print routines to normal */
987 print_command (char *exp
, int from_tty
)
989 print_command_1 (exp
, 0, 1);
992 /* Same as print, except in epoch, it gets its own window */
995 inspect_command (char *exp
, int from_tty
)
997 extern int epoch_interface
;
999 print_command_1 (exp
, epoch_interface
, 1);
1002 /* Same as print, except it doesn't print void results. */
1005 call_command (char *exp
, int from_tty
)
1007 print_command_1 (exp
, 0, 0);
1012 output_command (char *exp
, int from_tty
)
1014 struct expression
*expr
;
1015 register struct cleanup
*old_chain
;
1016 register char format
= 0;
1018 struct format_data fmt
;
1020 if (exp
&& *exp
== '/')
1023 fmt
= decode_format (&exp
, 0, 0);
1024 validate_format (fmt
, "output");
1025 format
= fmt
.format
;
1028 expr
= parse_expression (exp
);
1029 old_chain
= make_cleanup (free_current_contents
, &expr
);
1031 val
= evaluate_expression (expr
);
1033 annotate_value_begin (VALUE_TYPE (val
));
1035 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
1037 annotate_value_end ();
1040 gdb_flush (gdb_stdout
);
1042 do_cleanups (old_chain
);
1047 set_command (char *exp
, int from_tty
)
1049 struct expression
*expr
= parse_expression (exp
);
1050 register struct cleanup
*old_chain
=
1051 make_cleanup (free_current_contents
, &expr
);
1052 evaluate_expression (expr
);
1053 do_cleanups (old_chain
);
1058 sym_info (char *arg
, int from_tty
)
1060 struct minimal_symbol
*msymbol
;
1061 struct objfile
*objfile
;
1062 struct obj_section
*osect
;
1064 CORE_ADDR addr
, sect_addr
;
1066 unsigned int offset
;
1069 error_no_arg ("address");
1071 addr
= parse_and_eval_address (arg
);
1072 ALL_OBJSECTIONS (objfile
, osect
)
1074 sect
= osect
->the_bfd_section
;
1075 sect_addr
= overlay_mapped_address (addr
, sect
);
1077 if (osect
->addr
<= sect_addr
&& sect_addr
< osect
->endaddr
&&
1078 (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, sect
)))
1081 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1083 printf_filtered ("%s + %u in ",
1084 SYMBOL_SOURCE_NAME (msymbol
), offset
);
1086 printf_filtered ("%s in ",
1087 SYMBOL_SOURCE_NAME (msymbol
));
1088 if (pc_in_unmapped_range (addr
, sect
))
1089 printf_filtered ("load address range of ");
1090 if (section_is_overlay (sect
))
1091 printf_filtered ("%s overlay ",
1092 section_is_mapped (sect
) ? "mapped" : "unmapped");
1093 printf_filtered ("section %s", sect
->name
);
1094 printf_filtered ("\n");
1098 printf_filtered ("No symbol matches %s.\n", arg
);
1103 address_info (char *exp
, int from_tty
)
1105 register struct symbol
*sym
;
1106 register struct minimal_symbol
*msymbol
;
1108 register long basereg
;
1110 CORE_ADDR load_addr
;
1111 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1112 if exp is a field of `this'. */
1115 error ("Argument required.");
1117 sym
= lookup_symbol (exp
, get_selected_block (), VAR_NAMESPACE
,
1118 &is_a_field_of_this
, (struct symtab
**) NULL
);
1121 if (is_a_field_of_this
)
1123 printf_filtered ("Symbol \"");
1124 fprintf_symbol_filtered (gdb_stdout
, exp
,
1125 current_language
->la_language
, DMGL_ANSI
);
1126 printf_filtered ("\" is a field of the local class variable `this'\n");
1130 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1132 if (msymbol
!= NULL
)
1134 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1136 printf_filtered ("Symbol \"");
1137 fprintf_symbol_filtered (gdb_stdout
, exp
,
1138 current_language
->la_language
, DMGL_ANSI
);
1139 printf_filtered ("\" is at ");
1140 print_address_numeric (load_addr
, 1, gdb_stdout
);
1141 printf_filtered (" in a file compiled without debugging");
1142 section
= SYMBOL_BFD_SECTION (msymbol
);
1143 if (section_is_overlay (section
))
1145 load_addr
= overlay_unmapped_address (load_addr
, section
);
1146 printf_filtered (",\n -- loaded at ");
1147 print_address_numeric (load_addr
, 1, gdb_stdout
);
1148 printf_filtered (" in overlay section %s", section
->name
);
1150 printf_filtered (".\n");
1153 error ("No symbol \"%s\" in current context.", exp
);
1157 printf_filtered ("Symbol \"");
1158 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_NAME (sym
),
1159 current_language
->la_language
, DMGL_ANSI
);
1160 printf_filtered ("\" is ");
1161 val
= SYMBOL_VALUE (sym
);
1162 basereg
= SYMBOL_BASEREG (sym
);
1163 section
= SYMBOL_BFD_SECTION (sym
);
1165 switch (SYMBOL_CLASS (sym
))
1168 case LOC_CONST_BYTES
:
1169 printf_filtered ("constant");
1173 printf_filtered ("a label at address ");
1174 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1176 if (section_is_overlay (section
))
1178 load_addr
= overlay_unmapped_address (load_addr
, section
);
1179 printf_filtered (",\n -- loaded at ");
1180 print_address_numeric (load_addr
, 1, gdb_stdout
);
1181 printf_filtered (" in overlay section %s", section
->name
);
1186 printf_filtered ("a variable in register %s", REGISTER_NAME (val
));
1190 printf_filtered ("static storage at address ");
1191 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1193 if (section_is_overlay (section
))
1195 load_addr
= overlay_unmapped_address (load_addr
, section
);
1196 printf_filtered (",\n -- loaded at ");
1197 print_address_numeric (load_addr
, 1, gdb_stdout
);
1198 printf_filtered (" in overlay section %s", section
->name
);
1203 printf_filtered ("external global (indirect addressing), at address *(");
1204 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1206 printf_filtered (")");
1207 if (section_is_overlay (section
))
1209 load_addr
= overlay_unmapped_address (load_addr
, section
);
1210 printf_filtered (",\n -- loaded at ");
1211 print_address_numeric (load_addr
, 1, gdb_stdout
);
1212 printf_filtered (" in overlay section %s", section
->name
);
1217 printf_filtered ("an argument in register %s", REGISTER_NAME (val
));
1220 case LOC_REGPARM_ADDR
:
1221 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val
));
1225 printf_filtered ("an argument at offset %ld", val
);
1229 printf_filtered ("an argument at frame offset %ld", val
);
1233 printf_filtered ("a local variable at frame offset %ld", val
);
1237 printf_filtered ("a reference argument at offset %ld", val
);
1241 printf_filtered ("a variable at offset %ld from register %s",
1242 val
, REGISTER_NAME (basereg
));
1245 case LOC_BASEREG_ARG
:
1246 printf_filtered ("an argument at offset %ld from register %s",
1247 val
, REGISTER_NAME (basereg
));
1251 printf_filtered ("a typedef");
1255 printf_filtered ("a function at address ");
1256 #ifdef GDB_TARGET_MASK_DISAS_PC
1257 print_address_numeric
1258 (load_addr
= GDB_TARGET_MASK_DISAS_PC (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
))),
1261 print_address_numeric (load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
1264 if (section_is_overlay (section
))
1266 load_addr
= overlay_unmapped_address (load_addr
, section
);
1267 printf_filtered (",\n -- loaded at ");
1268 print_address_numeric (load_addr
, 1, gdb_stdout
);
1269 printf_filtered (" in overlay section %s", section
->name
);
1273 case LOC_UNRESOLVED
:
1275 struct minimal_symbol
*msym
;
1277 msym
= lookup_minimal_symbol (SYMBOL_NAME (sym
), NULL
, NULL
);
1279 printf_filtered ("unresolved");
1282 section
= SYMBOL_BFD_SECTION (msym
);
1283 printf_filtered ("static storage at address ");
1284 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (msym
),
1286 if (section_is_overlay (section
))
1288 load_addr
= overlay_unmapped_address (load_addr
, section
);
1289 printf_filtered (",\n -- loaded at ");
1290 print_address_numeric (load_addr
, 1, gdb_stdout
);
1291 printf_filtered (" in overlay section %s", section
->name
);
1297 case LOC_THREAD_LOCAL_STATIC
:
1299 "a thread-local variable at offset %ld from the thread base register %s",
1300 val
, REGISTER_NAME (basereg
));
1303 case LOC_OPTIMIZED_OUT
:
1304 printf_filtered ("optimized out");
1308 printf_filtered ("of unknown (botched) type");
1311 printf_filtered (".\n");
1315 x_command (char *exp
, int from_tty
)
1317 struct expression
*expr
;
1318 struct format_data fmt
;
1319 struct cleanup
*old_chain
;
1322 fmt
.format
= last_format
;
1323 fmt
.size
= last_size
;
1326 if (exp
&& *exp
== '/')
1329 fmt
= decode_format (&exp
, last_format
, last_size
);
1332 /* If we have an expression, evaluate it and use it as the address. */
1334 if (exp
!= 0 && *exp
!= 0)
1336 expr
= parse_expression (exp
);
1337 /* Cause expression not to be there any more
1338 if this command is repeated with Newline.
1339 But don't clobber a user-defined command's definition. */
1342 old_chain
= make_cleanup (free_current_contents
, &expr
);
1343 val
= evaluate_expression (expr
);
1344 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1345 val
= value_ind (val
);
1346 /* In rvalue contexts, such as this, functions are coerced into
1347 pointers to functions. This makes "x/i main" work. */
1348 if (/* last_format == 'i' && */
1349 TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1350 && VALUE_LVAL (val
) == lval_memory
)
1351 next_address
= VALUE_ADDRESS (val
);
1353 next_address
= value_as_address (val
);
1354 if (VALUE_BFD_SECTION (val
))
1355 next_section
= VALUE_BFD_SECTION (val
);
1356 do_cleanups (old_chain
);
1359 do_examine (fmt
, next_address
, next_section
);
1361 /* If the examine succeeds, we remember its size and format for next time. */
1362 last_size
= fmt
.size
;
1363 last_format
= fmt
.format
;
1365 /* Set a couple of internal variables if appropriate. */
1366 if (last_examine_value
)
1368 /* Make last address examined available to the user as $_. Use
1369 the correct pointer type. */
1370 struct type
*pointer_type
1371 = lookup_pointer_type (VALUE_TYPE (last_examine_value
));
1372 set_internalvar (lookup_internalvar ("_"),
1373 value_from_pointer (pointer_type
,
1374 last_examine_address
));
1376 /* Make contents of last address examined available to the user as $__. */
1377 /* If the last value has not been fetched from memory then don't
1378 fetch it now - instead mark it by voiding the $__ variable. */
1379 if (VALUE_LAZY (last_examine_value
))
1380 set_internalvar (lookup_internalvar ("__"),
1381 allocate_value (builtin_type_void
));
1383 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1388 /* Add an expression to the auto-display chain.
1389 Specify the expression. */
1392 display_command (char *exp
, int from_tty
)
1394 struct format_data fmt
;
1395 register struct expression
*expr
;
1396 register struct display
*new;
1400 if (tui_version
&& *exp
== '$')
1401 display_it
= (tui_set_layout (exp
) == TUI_FAILURE
);
1415 fmt
= decode_format (&exp
, 0, 0);
1416 if (fmt
.size
&& fmt
.format
== 0)
1418 if (fmt
.format
== 'i' || fmt
.format
== 's')
1428 innermost_block
= 0;
1429 expr
= parse_expression (exp
);
1431 new = (struct display
*) xmalloc (sizeof (struct display
));
1434 new->block
= innermost_block
;
1435 new->next
= display_chain
;
1436 new->number
= ++display_number
;
1439 display_chain
= new;
1441 if (from_tty
&& target_has_execution
)
1442 do_one_display (new);
1449 free_display (struct display
*d
)
1455 /* Clear out the display_chain.
1456 Done when new symtabs are loaded, since this invalidates
1457 the types stored in many expressions. */
1460 clear_displays (void)
1462 register struct display
*d
;
1464 while ((d
= display_chain
) != NULL
)
1467 display_chain
= d
->next
;
1472 /* Delete the auto-display number NUM. */
1475 delete_display (int num
)
1477 register struct display
*d1
, *d
;
1480 error ("No display number %d.", num
);
1482 if (display_chain
->number
== num
)
1485 display_chain
= d1
->next
;
1489 for (d
= display_chain
;; d
= d
->next
)
1492 error ("No display number %d.", num
);
1493 if (d
->next
->number
== num
)
1503 /* Delete some values from the auto-display chain.
1504 Specify the element numbers. */
1507 undisplay_command (char *args
, int from_tty
)
1509 register char *p
= args
;
1515 if (query ("Delete all auto-display expressions? "))
1524 while (*p1
>= '0' && *p1
<= '9')
1526 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1527 error ("Arguments must be display numbers.");
1531 delete_display (num
);
1534 while (*p
== ' ' || *p
== '\t')
1540 /* Display a single auto-display.
1541 Do nothing if the display cannot be printed in the current context,
1542 or if the display is disabled. */
1545 do_one_display (struct display
*d
)
1547 int within_current_scope
;
1549 if (d
->enabled_p
== 0)
1553 within_current_scope
= contained_in (get_selected_block (), d
->block
);
1555 within_current_scope
= 1;
1556 if (!within_current_scope
)
1559 current_display_number
= d
->number
;
1561 annotate_display_begin ();
1562 printf_filtered ("%d", d
->number
);
1563 annotate_display_number_end ();
1564 printf_filtered (": ");
1570 annotate_display_format ();
1572 printf_filtered ("x/");
1573 if (d
->format
.count
!= 1)
1574 printf_filtered ("%d", d
->format
.count
);
1575 printf_filtered ("%c", d
->format
.format
);
1576 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1577 printf_filtered ("%c", d
->format
.size
);
1578 printf_filtered (" ");
1580 annotate_display_expression ();
1582 print_expression (d
->exp
, gdb_stdout
);
1583 annotate_display_expression_end ();
1585 if (d
->format
.count
!= 1)
1586 printf_filtered ("\n");
1588 printf_filtered (" ");
1590 val
= evaluate_expression (d
->exp
);
1591 addr
= value_as_address (val
);
1592 if (d
->format
.format
== 'i')
1593 addr
= ADDR_BITS_REMOVE (addr
);
1595 annotate_display_value ();
1597 do_examine (d
->format
, addr
, VALUE_BFD_SECTION (val
));
1601 annotate_display_format ();
1603 if (d
->format
.format
)
1604 printf_filtered ("/%c ", d
->format
.format
);
1606 annotate_display_expression ();
1608 print_expression (d
->exp
, gdb_stdout
);
1609 annotate_display_expression_end ();
1611 printf_filtered (" = ");
1613 annotate_display_expression ();
1615 print_formatted (evaluate_expression (d
->exp
),
1616 d
->format
.format
, d
->format
.size
, gdb_stdout
);
1617 printf_filtered ("\n");
1620 annotate_display_end ();
1622 gdb_flush (gdb_stdout
);
1623 current_display_number
= -1;
1626 /* Display all of the values on the auto-display chain which can be
1627 evaluated in the current scope. */
1632 register struct display
*d
;
1634 for (d
= display_chain
; d
; d
= d
->next
)
1638 /* Delete the auto-display which we were in the process of displaying.
1639 This is done when there is an error or a signal. */
1642 disable_display (int num
)
1644 register struct display
*d
;
1646 for (d
= display_chain
; d
; d
= d
->next
)
1647 if (d
->number
== num
)
1652 printf_unfiltered ("No display number %d.\n", num
);
1656 disable_current_display (void)
1658 if (current_display_number
>= 0)
1660 disable_display (current_display_number
);
1661 fprintf_unfiltered (gdb_stderr
, "Disabling display %d to avoid infinite recursion.\n",
1662 current_display_number
);
1664 current_display_number
= -1;
1668 display_info (char *ignore
, int from_tty
)
1670 register struct display
*d
;
1673 printf_unfiltered ("There are no auto-display expressions now.\n");
1675 printf_filtered ("Auto-display expressions now in effect:\n\
1676 Num Enb Expression\n");
1678 for (d
= display_chain
; d
; d
= d
->next
)
1680 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1682 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1684 else if (d
->format
.format
)
1685 printf_filtered ("/%c ", d
->format
.format
);
1686 print_expression (d
->exp
, gdb_stdout
);
1687 if (d
->block
&& !contained_in (get_selected_block (), d
->block
))
1688 printf_filtered (" (cannot be evaluated in the current context)");
1689 printf_filtered ("\n");
1690 gdb_flush (gdb_stdout
);
1695 enable_display (char *args
, int from_tty
)
1697 register char *p
= args
;
1700 register struct display
*d
;
1704 for (d
= display_chain
; d
; d
= d
->next
)
1711 while (*p1
>= '0' && *p1
<= '9')
1713 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1714 error ("Arguments must be display numbers.");
1718 for (d
= display_chain
; d
; d
= d
->next
)
1719 if (d
->number
== num
)
1724 printf_unfiltered ("No display number %d.\n", num
);
1727 while (*p
== ' ' || *p
== '\t')
1734 disable_display_command (char *args
, int from_tty
)
1736 register char *p
= args
;
1738 register struct display
*d
;
1742 for (d
= display_chain
; d
; d
= d
->next
)
1749 while (*p1
>= '0' && *p1
<= '9')
1751 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1752 error ("Arguments must be display numbers.");
1754 disable_display (atoi (p
));
1757 while (*p
== ' ' || *p
== '\t')
1763 /* Print the value in stack frame FRAME of a variable
1764 specified by a struct symbol. */
1767 print_variable_value (struct symbol
*var
, struct frame_info
*frame
,
1768 struct ui_file
*stream
)
1770 struct value
*val
= read_var_value (var
, frame
);
1772 value_print (val
, stream
, 0, Val_pretty_default
);
1775 /* Print the arguments of a stack frame, given the function FUNC
1776 running in that frame (as a symbol), the info on the frame,
1777 and the number of args according to the stack frame (or -1 if unknown). */
1779 /* References here and elsewhere to "number of args according to the
1780 stack frame" appear in all cases to refer to "number of ints of args
1781 according to the stack frame". At least for VAX, i386, isi. */
1784 print_frame_args (struct symbol
*func
, struct frame_info
*fi
, int num
,
1785 struct ui_file
*stream
)
1787 struct block
*b
= NULL
;
1790 register struct symbol
*sym
;
1792 /* Offset of next stack argument beyond the one we have seen that is
1793 at the highest offset.
1794 -1 if we haven't come to a stack argument yet. */
1795 long highest_offset
= -1;
1797 /* Number of ints of arguments that we have printed so far. */
1798 int args_printed
= 0;
1800 struct cleanup
*old_chain
, *list_chain
;
1801 struct ui_stream
*stb
;
1803 stb
= ui_out_stream_new (uiout
);
1804 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1809 b
= SYMBOL_BLOCK_VALUE (func
);
1810 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1814 /* Keep track of the highest stack argument offset seen, and
1815 skip over any kinds of symbols we don't care about. */
1817 switch (SYMBOL_CLASS (sym
))
1822 long current_offset
= SYMBOL_VALUE (sym
);
1823 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1825 /* Compute address of next argument by adding the size of
1826 this argument and rounding to an int boundary. */
1828 ((current_offset
+ arg_size
+ sizeof (int) - 1)
1829 & ~(sizeof (int) - 1));
1831 /* If this is the highest offset seen yet, set highest_offset. */
1832 if (highest_offset
== -1
1833 || (current_offset
> highest_offset
))
1834 highest_offset
= current_offset
;
1836 /* Add the number of ints we're about to print to args_printed. */
1837 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1840 /* We care about types of symbols, but don't need to keep track of
1841 stack offsets in them. */
1843 case LOC_REGPARM_ADDR
:
1845 case LOC_BASEREG_ARG
:
1848 /* Other types of symbols we just skip over. */
1853 /* We have to look up the symbol because arguments can have
1854 two entries (one a parameter, one a local) and the one we
1855 want is the local, which lookup_symbol will find for us.
1856 This includes gcc1 (not gcc2) on the sparc when passing a
1857 small structure and gcc2 when the argument type is float
1858 and it is passed as a double and converted to float by
1859 the prologue (in the latter case the type of the LOC_ARG
1860 symbol is double and the type of the LOC_LOCAL symbol is
1862 /* But if the parameter name is null, don't try it.
1863 Null parameter names occur on the RS/6000, for traceback tables.
1864 FIXME, should we even print them? */
1866 if (*SYMBOL_NAME (sym
))
1868 struct symbol
*nsym
;
1869 nsym
= lookup_symbol
1871 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1872 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
1874 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
1875 it was passed on the stack and loaded into a register,
1876 or passed in a register and stored in a stack slot.
1877 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
1879 Reasons for using the LOC_ARG:
1880 (1) because find_saved_registers may be slow for remote
1882 (2) because registers are often re-used and stack slots
1883 rarely (never?) are. Therefore using the stack slot is
1884 much less likely to print garbage.
1886 Reasons why we might want to use the LOC_REGISTER:
1887 (1) So that the backtrace prints the same value as
1888 "print foo". I see no compelling reason why this needs
1889 to be the case; having the backtrace print the value which
1890 was passed in, and "print foo" print the value as modified
1891 within the called function, makes perfect sense to me.
1893 Additional note: It might be nice if "info args" displayed
1895 One more note: There is a case with sparc structure passing
1896 where we need to use the LOC_REGISTER, but this is dealt with
1897 by creating a single LOC_REGPARM in symbol reading. */
1899 /* Leave sym (the LOC_ARG) alone. */
1907 /* Print the current arg. */
1909 ui_out_text (uiout
, ", ");
1910 ui_out_wrap_hint (uiout
, " ");
1912 annotate_arg_begin ();
1914 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
1915 fprintf_symbol_filtered (stb
->stream
, SYMBOL_SOURCE_NAME (sym
),
1916 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1917 ui_out_field_stream (uiout
, "name", stb
);
1918 annotate_arg_name_end ();
1919 ui_out_text (uiout
, "=");
1921 /* Print the current arg. */
1923 fprintf_filtered (stream
, ", ");
1926 annotate_arg_begin ();
1928 fprintf_symbol_filtered (stream
, SYMBOL_SOURCE_NAME (sym
),
1929 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1930 annotate_arg_name_end ();
1931 fputs_filtered ("=", stream
);
1934 /* Avoid value_print because it will deref ref parameters. We just
1935 want to print their addresses. Print ??? for args whose address
1936 we do not know. We pass 2 as "recurse" to val_print because our
1937 standard indentation here is 4 spaces, and val_print indents
1938 2 for each recurse. */
1939 val
= read_var_value (sym
, fi
);
1941 annotate_arg_value (val
== NULL
? NULL
: VALUE_TYPE (val
));
1946 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
1947 VALUE_ADDRESS (val
),
1948 stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
1949 ui_out_field_stream (uiout
, "value", stb
);
1952 ui_out_text (uiout
, "???");
1954 /* Invoke ui_out_tuple_end. */
1955 do_cleanups (list_chain
);
1957 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
1958 VALUE_ADDRESS (val
),
1959 stream
, 0, 0, 2, Val_no_prettyprint
);
1962 fputs_filtered ("???", stream
);
1965 annotate_arg_end ();
1971 /* Don't print nameless args in situations where we don't know
1972 enough about the stack to find them. */
1977 if (highest_offset
== -1)
1978 start
= FRAME_ARGS_SKIP
;
1980 start
= highest_offset
;
1982 print_frame_nameless_args (fi
, start
, num
- args_printed
,
1986 do_cleanups (old_chain
);
1987 #endif /* no UI_OUT */
1990 /* Print nameless args on STREAM.
1991 FI is the frameinfo for this frame, START is the offset
1992 of the first nameless arg, and NUM is the number of nameless args to
1993 print. FIRST is nonzero if this is the first argument (not just
1994 the first nameless arg). */
1997 print_frame_nameless_args (struct frame_info
*fi
, long start
, int num
,
1998 int first
, struct ui_file
*stream
)
2004 for (i
= 0; i
< num
; i
++)
2007 #ifdef NAMELESS_ARG_VALUE
2008 NAMELESS_ARG_VALUE (fi
, start
, &arg_value
);
2010 argsaddr
= FRAME_ARGS_ADDRESS (fi
);
2014 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
2018 fprintf_filtered (stream
, ", ");
2020 #ifdef PRINT_NAMELESS_INTEGER
2021 PRINT_NAMELESS_INTEGER (stream
, arg_value
);
2023 #ifdef PRINT_TYPELESS_INTEGER
2024 PRINT_TYPELESS_INTEGER (stream
, builtin_type_int
, (LONGEST
) arg_value
);
2026 fprintf_filtered (stream
, "%ld", arg_value
);
2027 #endif /* PRINT_TYPELESS_INTEGER */
2028 #endif /* PRINT_NAMELESS_INTEGER */
2030 start
+= sizeof (int);
2036 printf_command (char *arg
, int from_tty
)
2038 register char *f
= NULL
;
2039 register char *s
= arg
;
2040 char *string
= NULL
;
2041 struct value
**val_args
;
2043 char *current_substring
;
2045 int allocated_args
= 20;
2046 struct cleanup
*old_cleanups
;
2048 val_args
= (struct value
**) xmalloc (allocated_args
2049 * sizeof (struct value
*));
2050 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2053 error_no_arg ("format-control string and values to print");
2055 /* Skip white space before format string */
2056 while (*s
== ' ' || *s
== '\t')
2059 /* A format string should follow, enveloped in double quotes */
2061 error ("Bad format string, missing '\"'.");
2063 /* Parse the format-control string and copy it into the string STRING,
2064 processing some kinds of escape sequence. */
2066 f
= string
= (char *) alloca (strlen (s
) + 1);
2074 error ("Bad format string, non-terminated '\"'.");
2107 /* ??? TODO: handle other escape sequences */
2108 error ("Unrecognized escape character \\%c in format string.",
2118 /* Skip over " and following space and comma. */
2121 while (*s
== ' ' || *s
== '\t')
2124 if (*s
!= ',' && *s
!= 0)
2125 error ("Invalid argument syntax");
2129 while (*s
== ' ' || *s
== '\t')
2132 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2133 substrings
= alloca (strlen (string
) * 2);
2134 current_substring
= substrings
;
2137 /* Now scan the string for %-specs and see what kinds of args they want.
2138 argclass[I] classifies the %-specs so we can give printf_filtered
2139 something of the right size. */
2143 no_arg
, int_arg
, string_arg
, double_arg
, long_long_arg
2145 enum argclass
*argclass
;
2146 enum argclass this_argclass
;
2152 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2160 while (strchr ("0123456789.hlL-+ #", *f
))
2162 if (*f
== 'l' || *f
== 'L')
2169 this_argclass
= string_arg
;
2175 this_argclass
= double_arg
;
2179 error ("`*' not supported for precision or width in printf");
2182 error ("Format specifier `n' not supported in printf");
2185 this_argclass
= no_arg
;
2190 this_argclass
= long_long_arg
;
2192 this_argclass
= int_arg
;
2196 if (this_argclass
!= no_arg
)
2198 strncpy (current_substring
, last_arg
, f
- last_arg
);
2199 current_substring
+= f
- last_arg
;
2200 *current_substring
++ = '\0';
2202 argclass
[nargs_wanted
++] = this_argclass
;
2206 /* Now, parse all arguments and evaluate them.
2207 Store the VALUEs in VAL_ARGS. */
2212 if (nargs
== allocated_args
)
2213 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2214 (allocated_args
*= 2)
2215 * sizeof (struct value
*));
2217 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2219 /* If format string wants a float, unchecked-convert the value to
2220 floating point of the same size */
2222 if (argclass
[nargs
] == double_arg
)
2224 struct type
*type
= VALUE_TYPE (val_args
[nargs
]);
2225 if (TYPE_LENGTH (type
) == sizeof (float))
2226 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
2227 if (TYPE_LENGTH (type
) == sizeof (double))
2228 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
2236 if (nargs
!= nargs_wanted
)
2237 error ("Wrong number of arguments for specified format-string");
2239 /* Now actually print them. */
2240 current_substring
= substrings
;
2241 for (i
= 0; i
< nargs
; i
++)
2243 switch (argclass
[i
])
2250 tem
= value_as_address (val_args
[i
]);
2252 /* This is a %s argument. Find the length of the string. */
2257 read_memory (tem
+ j
, &c
, 1);
2262 /* Copy the string contents into a string inside GDB. */
2263 str
= (char *) alloca (j
+ 1);
2265 read_memory (tem
, str
, j
);
2268 printf_filtered (current_substring
, str
);
2273 double val
= value_as_double (val_args
[i
]);
2274 printf_filtered (current_substring
, val
);
2278 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2280 long long val
= value_as_long (val_args
[i
]);
2281 printf_filtered (current_substring
, val
);
2285 error ("long long not supported in printf");
2289 /* FIXME: there should be separate int_arg and long_arg. */
2290 long val
= value_as_long (val_args
[i
]);
2291 printf_filtered (current_substring
, val
);
2294 default: /* purecov: deadcode */
2295 error ("internal error in printf_command"); /* purecov: deadcode */
2297 /* Skip to the next substring. */
2298 current_substring
+= strlen (current_substring
) + 1;
2300 /* Print the portion of the format string after the last argument. */
2301 printf_filtered (last_arg
);
2303 do_cleanups (old_cleanups
);
2306 /* Dump a specified section of assembly code. With no command line
2307 arguments, this command will dump the assembly code for the
2308 function surrounding the pc value in the selected frame. With one
2309 argument, it will dump the assembly code surrounding that pc value.
2310 Two arguments are interpeted as bounds within which to dump
2315 disassemble_command (char *arg
, int from_tty
)
2317 CORE_ADDR low
, high
;
2319 CORE_ADDR pc
, pc_masked
;
2328 if (!selected_frame
)
2329 error ("No frame selected.\n");
2331 pc
= get_frame_pc (selected_frame
);
2332 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2333 error ("No function contains program counter for selected frame.\n");
2335 else if (tui_version
)
2336 low
= tuiGetLowDisassemblyAddress (low
, pc
);
2338 low
+= FUNCTION_START_OFFSET
;
2340 else if (!(space_index
= (char *) strchr (arg
, ' ')))
2343 pc
= parse_and_eval_address (arg
);
2344 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2345 error ("No function contains specified address.\n");
2347 else if (tui_version
)
2348 low
= tuiGetLowDisassemblyAddress (low
, pc
);
2351 if (overlay_debugging
)
2353 section
= find_pc_overlay (pc
);
2354 if (pc_in_unmapped_range (pc
, section
))
2356 /* find_pc_partial_function will have returned low and high
2357 relative to the symbolic (mapped) address range. Need to
2358 translate them back to the unmapped range where PC is. */
2359 low
= overlay_unmapped_address (low
, section
);
2360 high
= overlay_unmapped_address (high
, section
);
2364 low
+= FUNCTION_START_OFFSET
;
2368 /* Two arguments. */
2369 *space_index
= '\0';
2370 low
= parse_and_eval_address (arg
);
2371 high
= parse_and_eval_address (space_index
+ 1);
2375 if (!tui_is_window_visible (DISASSEM_WIN
))
2378 printf_filtered ("Dump of assembler code ");
2381 printf_filtered ("for function %s:\n", name
);
2385 printf_filtered ("from ");
2386 print_address_numeric (low
, 1, gdb_stdout
);
2387 printf_filtered (" to ");
2388 print_address_numeric (high
, 1, gdb_stdout
);
2389 printf_filtered (":\n");
2392 /* Dump the specified range. */
2395 #ifdef GDB_TARGET_MASK_DISAS_PC
2396 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2401 while (pc_masked
< high
)
2404 print_address (pc_masked
, gdb_stdout
);
2405 printf_filtered (":\t");
2406 /* We often wrap here if there are long symbolic names. */
2408 pc
+= print_insn (pc
, gdb_stdout
);
2409 printf_filtered ("\n");
2411 #ifdef GDB_TARGET_MASK_DISAS_PC
2412 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2417 printf_filtered ("End of assembler dump.\n");
2418 gdb_flush (gdb_stdout
);
2423 tui_show_assembly (low
);
2428 /* Print the instruction at address MEMADDR in debugged memory,
2429 on STREAM. Returns length of the instruction, in bytes. */
2432 print_insn (CORE_ADDR memaddr
, struct ui_file
*stream
)
2434 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
2435 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_BIG
;
2437 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_LITTLE
;
2439 if (TARGET_ARCHITECTURE
!= NULL
)
2440 TARGET_PRINT_INSN_INFO
->mach
= TARGET_ARCHITECTURE
->mach
;
2441 /* else: should set .mach=0 but some disassemblers don't grok this */
2443 TARGET_PRINT_INSN_INFO
->stream
= stream
;
2445 return TARGET_PRINT_INSN (memaddr
, TARGET_PRINT_INSN_INFO
);
2450 _initialize_printcmd (void)
2452 struct cmd_list_element
*c
;
2454 current_display_number
= -1;
2456 add_info ("address", address_info
,
2457 "Describe where symbol SYM is stored.");
2459 add_info ("symbol", sym_info
,
2460 "Describe what symbol is at location ADDR.\n\
2461 Only for symbols with fixed locations (global or static scope).");
2463 add_com ("x", class_vars
, x_command
,
2464 concat ("Examine memory: x/FMT ADDRESS.\n\
2465 ADDRESS is an expression for the memory address to examine.\n\
2466 FMT is a repeat count followed by a format letter and a size letter.\n\
2467 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2468 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2469 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2470 The specified number of objects of the specified size are printed\n\
2471 according to the format.\n\n\
2472 Defaults for format and size letters are those previously used.\n\
2473 Default count is 1. Default address is following last thing printed\n\
2474 with this command or \"print\".", NULL
));
2476 c
= add_com ("disassemble", class_vars
, disassemble_command
,
2477 "Disassemble a specified section of memory.\n\
2478 Default is the function surrounding the pc of the selected frame.\n\
2479 With a single argument, the function surrounding that address is dumped.\n\
2480 Two arguments are taken as a range of memory to dump.");
2481 c
->completer
= location_completer
;
2483 add_com_alias ("va", "disassemble", class_xdb
, 0);
2486 add_com ("whereis", class_vars
, whereis_command
,
2487 "Print line number and file of definition of variable.");
2490 add_info ("display", display_info
,
2491 "Expressions to display when program stops, with code numbers.");
2493 add_cmd ("undisplay", class_vars
, undisplay_command
,
2494 "Cancel some expressions to be displayed when program stops.\n\
2495 Arguments are the code numbers of the expressions to stop displaying.\n\
2496 No argument means cancel all automatic-display expressions.\n\
2497 \"delete display\" has the same effect as this command.\n\
2498 Do \"info display\" to see current list of code numbers.",
2501 add_com ("display", class_vars
, display_command
,
2502 "Print value of expression EXP each time the program stops.\n\
2503 /FMT may be used before EXP as in the \"print\" command.\n\
2504 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2505 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2506 and examining is done as in the \"x\" command.\n\n\
2507 With no argument, display all currently requested auto-display expressions.\n\
2508 Use \"undisplay\" to cancel display requests previously made."
2511 add_cmd ("display", class_vars
, enable_display
,
2512 "Enable some expressions to be displayed when program stops.\n\
2513 Arguments are the code numbers of the expressions to resume displaying.\n\
2514 No argument means enable all automatic-display expressions.\n\
2515 Do \"info display\" to see current list of code numbers.", &enablelist
);
2517 add_cmd ("display", class_vars
, disable_display_command
,
2518 "Disable some expressions to be displayed when program stops.\n\
2519 Arguments are the code numbers of the expressions to stop displaying.\n\
2520 No argument means disable all automatic-display expressions.\n\
2521 Do \"info display\" to see current list of code numbers.", &disablelist
);
2523 add_cmd ("display", class_vars
, undisplay_command
,
2524 "Cancel some expressions to be displayed when program stops.\n\
2525 Arguments are the code numbers of the expressions to stop displaying.\n\
2526 No argument means cancel all automatic-display expressions.\n\
2527 Do \"info display\" to see current list of code numbers.", &deletelist
);
2529 add_com ("printf", class_vars
, printf_command
,
2530 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2531 This is useful for formatted output in user-defined commands.");
2533 add_com ("output", class_vars
, output_command
,
2534 "Like \"print\" but don't put in value history and don't print newline.\n\
2535 This is useful in user-defined commands.");
2537 add_prefix_cmd ("set", class_vars
, set_command
,
2538 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2539 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2540 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2541 with $), a register (a few standard names starting with $), or an actual\n\
2542 variable in the program being debugged. EXP is any valid expression.\n",
2543 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2544 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2545 You can see these environment settings with the \"show\" command.", NULL
),
2546 &setlist
, "set ", 1, &cmdlist
);
2548 add_com ("assign", class_vars
, set_command
, concat ("Evaluate expression \
2549 EXP and assign result to variable VAR, using assignment\n\
2550 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2551 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2552 with $), a register (a few standard names starting with $), or an actual\n\
2553 variable in the program being debugged. EXP is any valid expression.\n",
2554 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2555 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2556 You can see these environment settings with the \"show\" command.", NULL
));
2558 /* "call" is the same as "set", but handy for dbx users to call fns. */
2559 c
= add_com ("call", class_vars
, call_command
,
2560 "Call a function in the program.\n\
2561 The argument is the function name and arguments, in the notation of the\n\
2562 current working language. The result is printed and saved in the value\n\
2563 history, if it is not void.");
2564 c
->completer
= location_completer
;
2566 add_cmd ("variable", class_vars
, set_command
,
2567 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2568 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2569 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2570 with $), a register (a few standard names starting with $), or an actual\n\
2571 variable in the program being debugged. EXP is any valid expression.\n\
2572 This may usually be abbreviated to simply \"set\".",
2575 c
= add_com ("print", class_vars
, print_command
,
2576 concat ("Print value of expression EXP.\n\
2577 Variables accessible are those of the lexical environment of the selected\n\
2578 stack frame, plus all those whose scope is global or an entire file.\n\
2580 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2581 $$NUM refers to NUM'th value back from the last one.\n\
2582 Names starting with $ refer to registers (with the values they would have\n",
2583 "if the program were to return to the stack frame now selected, restoring\n\
2584 all registers saved by frames farther in) or else to debugger\n\
2585 \"convenience\" variables (any such name not a known register).\n\
2586 Use assignment expressions to give values to convenience variables.\n",
2588 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2589 @ is a binary operator for treating consecutive data objects\n\
2590 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2591 element is FOO, whose second element is stored in the space following\n\
2592 where FOO is stored, etc. FOO must be an expression whose value\n\
2593 resides in memory.\n",
2595 EXP may be preceded with /FMT, where FMT is a format letter\n\
2596 but no count or size letter (see \"x\" command).", NULL
));
2597 c
->completer
= location_completer
;
2598 add_com_alias ("p", "print", class_vars
, 1);
2600 c
= add_com ("inspect", class_vars
, inspect_command
,
2601 "Same as \"print\" command, except that if you are running in the epoch\n\
2602 environment, the value is printed in its own window.");
2603 c
->completer
= location_completer
;
2606 add_set_cmd ("max-symbolic-offset", no_class
, var_uinteger
,
2607 (char *) &max_symbolic_offset
,
2608 "Set the largest offset that will be printed in <symbol+1234> form.",
2612 add_set_cmd ("symbol-filename", no_class
, var_boolean
,
2613 (char *) &print_symbol_filename
,
2614 "Set printing of source filename and line number with <symbol>.",
2618 /* For examine/instruction a single byte quantity is specified as
2619 the data. This avoids problems with value_at_lazy() requiring a
2620 valid data type (and rejecting VOID). */
2621 examine_i_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_i_type", NULL
);
2623 examine_b_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_b_type", NULL
);
2624 examine_h_type
= init_type (TYPE_CODE_INT
, 2, 0, "examine_h_type", NULL
);
2625 examine_w_type
= init_type (TYPE_CODE_INT
, 4, 0, "examine_w_type", NULL
);
2626 examine_g_type
= init_type (TYPE_CODE_INT
, 8, 0, "examine_g_type", NULL
);