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 ");
1108 if (current_language
->la_language
== language_objc
)
1109 printf_filtered ("'self'\n"); /* ObjC equivalent of "this" */
1111 printf_filtered ("'this'\n");
1115 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1117 if (msymbol
!= NULL
)
1119 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1121 printf_filtered ("Symbol \"");
1122 fprintf_symbol_filtered (gdb_stdout
, exp
,
1123 current_language
->la_language
, DMGL_ANSI
);
1124 printf_filtered ("\" is at ");
1125 print_address_numeric (load_addr
, 1, gdb_stdout
);
1126 printf_filtered (" in a file compiled without debugging");
1127 section
= SYMBOL_BFD_SECTION (msymbol
);
1128 if (section_is_overlay (section
))
1130 load_addr
= overlay_unmapped_address (load_addr
, section
);
1131 printf_filtered (",\n -- loaded at ");
1132 print_address_numeric (load_addr
, 1, gdb_stdout
);
1133 printf_filtered (" in overlay section %s", section
->name
);
1135 printf_filtered (".\n");
1138 error ("No symbol \"%s\" in current context.", exp
);
1142 printf_filtered ("Symbol \"");
1143 fprintf_symbol_filtered (gdb_stdout
, SYMBOL_NAME (sym
),
1144 current_language
->la_language
, DMGL_ANSI
);
1145 printf_filtered ("\" is ");
1146 val
= SYMBOL_VALUE (sym
);
1147 basereg
= SYMBOL_BASEREG (sym
);
1148 section
= SYMBOL_BFD_SECTION (sym
);
1150 switch (SYMBOL_CLASS (sym
))
1153 case LOC_CONST_BYTES
:
1154 printf_filtered ("constant");
1158 printf_filtered ("a label at address ");
1159 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1161 if (section_is_overlay (section
))
1163 load_addr
= overlay_unmapped_address (load_addr
, section
);
1164 printf_filtered (",\n -- loaded at ");
1165 print_address_numeric (load_addr
, 1, gdb_stdout
);
1166 printf_filtered (" in overlay section %s", section
->name
);
1171 printf_filtered ("a variable in register %s", REGISTER_NAME (val
));
1175 printf_filtered ("static storage at address ");
1176 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1178 if (section_is_overlay (section
))
1180 load_addr
= overlay_unmapped_address (load_addr
, section
);
1181 printf_filtered (",\n -- loaded at ");
1182 print_address_numeric (load_addr
, 1, gdb_stdout
);
1183 printf_filtered (" in overlay section %s", section
->name
);
1188 printf_filtered ("external global (indirect addressing), at address *(");
1189 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1191 printf_filtered (")");
1192 if (section_is_overlay (section
))
1194 load_addr
= overlay_unmapped_address (load_addr
, section
);
1195 printf_filtered (",\n -- loaded at ");
1196 print_address_numeric (load_addr
, 1, gdb_stdout
);
1197 printf_filtered (" in overlay section %s", section
->name
);
1202 printf_filtered ("an argument in register %s", REGISTER_NAME (val
));
1205 case LOC_REGPARM_ADDR
:
1206 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val
));
1210 printf_filtered ("an argument at offset %ld", val
);
1214 printf_filtered ("an argument at frame offset %ld", val
);
1218 printf_filtered ("a local variable at frame offset %ld", val
);
1222 printf_filtered ("a reference argument at offset %ld", val
);
1226 printf_filtered ("a variable at offset %ld from register %s",
1227 val
, REGISTER_NAME (basereg
));
1230 case LOC_BASEREG_ARG
:
1231 printf_filtered ("an argument at offset %ld from register %s",
1232 val
, REGISTER_NAME (basereg
));
1236 printf_filtered ("a typedef");
1240 printf_filtered ("a function at address ");
1241 #ifdef GDB_TARGET_MASK_DISAS_PC
1242 print_address_numeric
1243 (load_addr
= GDB_TARGET_MASK_DISAS_PC (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
))),
1246 print_address_numeric (load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
1249 if (section_is_overlay (section
))
1251 load_addr
= overlay_unmapped_address (load_addr
, section
);
1252 printf_filtered (",\n -- loaded at ");
1253 print_address_numeric (load_addr
, 1, gdb_stdout
);
1254 printf_filtered (" in overlay section %s", section
->name
);
1258 case LOC_UNRESOLVED
:
1260 struct minimal_symbol
*msym
;
1262 msym
= lookup_minimal_symbol (SYMBOL_NAME (sym
), NULL
, NULL
);
1264 printf_filtered ("unresolved");
1267 section
= SYMBOL_BFD_SECTION (msym
);
1268 printf_filtered ("static storage at address ");
1269 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (msym
),
1271 if (section_is_overlay (section
))
1273 load_addr
= overlay_unmapped_address (load_addr
, section
);
1274 printf_filtered (",\n -- loaded at ");
1275 print_address_numeric (load_addr
, 1, gdb_stdout
);
1276 printf_filtered (" in overlay section %s", section
->name
);
1282 case LOC_HP_THREAD_LOCAL_STATIC
:
1284 "a thread-local variable at offset %ld from the thread base register %s",
1285 val
, REGISTER_NAME (basereg
));
1288 case LOC_THREAD_LOCAL_STATIC
:
1289 printf_filtered ("a thread-local variable at offset %ld in the "
1290 "thread-local storage for `%s'",
1291 val
, SYMBOL_OBJFILE (sym
)->name
);
1294 case LOC_OPTIMIZED_OUT
:
1295 printf_filtered ("optimized out");
1299 printf_filtered ("of unknown (botched) type");
1302 printf_filtered (".\n");
1306 x_command (char *exp
, int from_tty
)
1308 struct expression
*expr
;
1309 struct format_data fmt
;
1310 struct cleanup
*old_chain
;
1313 fmt
.format
= last_format
;
1314 fmt
.size
= last_size
;
1317 if (exp
&& *exp
== '/')
1320 fmt
= decode_format (&exp
, last_format
, last_size
);
1323 /* If we have an expression, evaluate it and use it as the address. */
1325 if (exp
!= 0 && *exp
!= 0)
1327 expr
= parse_expression (exp
);
1328 /* Cause expression not to be there any more
1329 if this command is repeated with Newline.
1330 But don't clobber a user-defined command's definition. */
1333 old_chain
= make_cleanup (free_current_contents
, &expr
);
1334 val
= evaluate_expression (expr
);
1335 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1336 val
= value_ind (val
);
1337 /* In rvalue contexts, such as this, functions are coerced into
1338 pointers to functions. This makes "x/i main" work. */
1339 if (/* last_format == 'i' && */
1340 TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1341 && VALUE_LVAL (val
) == lval_memory
)
1342 next_address
= VALUE_ADDRESS (val
);
1344 next_address
= value_as_address (val
);
1345 if (VALUE_BFD_SECTION (val
))
1346 next_section
= VALUE_BFD_SECTION (val
);
1347 do_cleanups (old_chain
);
1350 do_examine (fmt
, next_address
, next_section
);
1352 /* If the examine succeeds, we remember its size and format for next time. */
1353 last_size
= fmt
.size
;
1354 last_format
= fmt
.format
;
1356 /* Set a couple of internal variables if appropriate. */
1357 if (last_examine_value
)
1359 /* Make last address examined available to the user as $_. Use
1360 the correct pointer type. */
1361 struct type
*pointer_type
1362 = lookup_pointer_type (VALUE_TYPE (last_examine_value
));
1363 set_internalvar (lookup_internalvar ("_"),
1364 value_from_pointer (pointer_type
,
1365 last_examine_address
));
1367 /* Make contents of last address examined available to the user as $__. */
1368 /* If the last value has not been fetched from memory then don't
1369 fetch it now - instead mark it by voiding the $__ variable. */
1370 if (VALUE_LAZY (last_examine_value
))
1371 set_internalvar (lookup_internalvar ("__"),
1372 allocate_value (builtin_type_void
));
1374 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1379 /* Add an expression to the auto-display chain.
1380 Specify the expression. */
1383 display_command (char *exp
, int from_tty
)
1385 struct format_data fmt
;
1386 register struct expression
*expr
;
1387 register struct display
*new;
1391 if (tui_version
&& *exp
== '$')
1392 display_it
= (tui_set_layout (exp
) == TUI_FAILURE
);
1406 fmt
= decode_format (&exp
, 0, 0);
1407 if (fmt
.size
&& fmt
.format
== 0)
1409 if (fmt
.format
== 'i' || fmt
.format
== 's')
1419 innermost_block
= 0;
1420 expr
= parse_expression (exp
);
1422 new = (struct display
*) xmalloc (sizeof (struct display
));
1425 new->block
= innermost_block
;
1426 new->next
= display_chain
;
1427 new->number
= ++display_number
;
1430 display_chain
= new;
1432 if (from_tty
&& target_has_execution
)
1433 do_one_display (new);
1440 free_display (struct display
*d
)
1446 /* Clear out the display_chain.
1447 Done when new symtabs are loaded, since this invalidates
1448 the types stored in many expressions. */
1451 clear_displays (void)
1453 register struct display
*d
;
1455 while ((d
= display_chain
) != NULL
)
1458 display_chain
= d
->next
;
1463 /* Delete the auto-display number NUM. */
1466 delete_display (int num
)
1468 register struct display
*d1
, *d
;
1471 error ("No display number %d.", num
);
1473 if (display_chain
->number
== num
)
1476 display_chain
= d1
->next
;
1480 for (d
= display_chain
;; d
= d
->next
)
1483 error ("No display number %d.", num
);
1484 if (d
->next
->number
== num
)
1494 /* Delete some values from the auto-display chain.
1495 Specify the element numbers. */
1498 undisplay_command (char *args
, int from_tty
)
1500 register char *p
= args
;
1506 if (query ("Delete all auto-display expressions? "))
1515 while (*p1
>= '0' && *p1
<= '9')
1517 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1518 error ("Arguments must be display numbers.");
1522 delete_display (num
);
1525 while (*p
== ' ' || *p
== '\t')
1531 /* Display a single auto-display.
1532 Do nothing if the display cannot be printed in the current context,
1533 or if the display is disabled. */
1536 do_one_display (struct display
*d
)
1538 int within_current_scope
;
1540 if (d
->enabled_p
== 0)
1544 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1546 within_current_scope
= 1;
1547 if (!within_current_scope
)
1550 current_display_number
= d
->number
;
1552 annotate_display_begin ();
1553 printf_filtered ("%d", d
->number
);
1554 annotate_display_number_end ();
1555 printf_filtered (": ");
1561 annotate_display_format ();
1563 printf_filtered ("x/");
1564 if (d
->format
.count
!= 1)
1565 printf_filtered ("%d", d
->format
.count
);
1566 printf_filtered ("%c", d
->format
.format
);
1567 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1568 printf_filtered ("%c", d
->format
.size
);
1569 printf_filtered (" ");
1571 annotate_display_expression ();
1573 print_expression (d
->exp
, gdb_stdout
);
1574 annotate_display_expression_end ();
1576 if (d
->format
.count
!= 1)
1577 printf_filtered ("\n");
1579 printf_filtered (" ");
1581 val
= evaluate_expression (d
->exp
);
1582 addr
= value_as_address (val
);
1583 if (d
->format
.format
== 'i')
1584 addr
= ADDR_BITS_REMOVE (addr
);
1586 annotate_display_value ();
1588 do_examine (d
->format
, addr
, VALUE_BFD_SECTION (val
));
1592 annotate_display_format ();
1594 if (d
->format
.format
)
1595 printf_filtered ("/%c ", d
->format
.format
);
1597 annotate_display_expression ();
1599 print_expression (d
->exp
, gdb_stdout
);
1600 annotate_display_expression_end ();
1602 printf_filtered (" = ");
1604 annotate_display_expression ();
1606 print_formatted (evaluate_expression (d
->exp
),
1607 d
->format
.format
, d
->format
.size
, gdb_stdout
);
1608 printf_filtered ("\n");
1611 annotate_display_end ();
1613 gdb_flush (gdb_stdout
);
1614 current_display_number
= -1;
1617 /* Display all of the values on the auto-display chain which can be
1618 evaluated in the current scope. */
1623 register struct display
*d
;
1625 for (d
= display_chain
; d
; d
= d
->next
)
1629 /* Delete the auto-display which we were in the process of displaying.
1630 This is done when there is an error or a signal. */
1633 disable_display (int num
)
1635 register struct display
*d
;
1637 for (d
= display_chain
; d
; d
= d
->next
)
1638 if (d
->number
== num
)
1643 printf_unfiltered ("No display number %d.\n", num
);
1647 disable_current_display (void)
1649 if (current_display_number
>= 0)
1651 disable_display (current_display_number
);
1652 fprintf_unfiltered (gdb_stderr
, "Disabling display %d to avoid infinite recursion.\n",
1653 current_display_number
);
1655 current_display_number
= -1;
1659 display_info (char *ignore
, int from_tty
)
1661 register struct display
*d
;
1664 printf_unfiltered ("There are no auto-display expressions now.\n");
1666 printf_filtered ("Auto-display expressions now in effect:\n\
1667 Num Enb Expression\n");
1669 for (d
= display_chain
; d
; d
= d
->next
)
1671 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1673 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1675 else if (d
->format
.format
)
1676 printf_filtered ("/%c ", d
->format
.format
);
1677 print_expression (d
->exp
, gdb_stdout
);
1678 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1679 printf_filtered (" (cannot be evaluated in the current context)");
1680 printf_filtered ("\n");
1681 gdb_flush (gdb_stdout
);
1686 enable_display (char *args
, int from_tty
)
1688 register char *p
= args
;
1691 register struct display
*d
;
1695 for (d
= display_chain
; d
; d
= d
->next
)
1702 while (*p1
>= '0' && *p1
<= '9')
1704 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1705 error ("Arguments must be display numbers.");
1709 for (d
= display_chain
; d
; d
= d
->next
)
1710 if (d
->number
== num
)
1715 printf_unfiltered ("No display number %d.\n", num
);
1718 while (*p
== ' ' || *p
== '\t')
1725 disable_display_command (char *args
, int from_tty
)
1727 register char *p
= args
;
1729 register struct display
*d
;
1733 for (d
= display_chain
; d
; d
= d
->next
)
1740 while (*p1
>= '0' && *p1
<= '9')
1742 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1743 error ("Arguments must be display numbers.");
1745 disable_display (atoi (p
));
1748 while (*p
== ' ' || *p
== '\t')
1754 /* Print the value in stack frame FRAME of a variable
1755 specified by a struct symbol. */
1758 print_variable_value (struct symbol
*var
, struct frame_info
*frame
,
1759 struct ui_file
*stream
)
1761 struct value
*val
= read_var_value (var
, frame
);
1763 value_print (val
, stream
, 0, Val_pretty_default
);
1766 /* Print the arguments of a stack frame, given the function FUNC
1767 running in that frame (as a symbol), the info on the frame,
1768 and the number of args according to the stack frame (or -1 if unknown). */
1770 /* References here and elsewhere to "number of args according to the
1771 stack frame" appear in all cases to refer to "number of ints of args
1772 according to the stack frame". At least for VAX, i386, isi. */
1775 print_frame_args (struct symbol
*func
, struct frame_info
*fi
, int num
,
1776 struct ui_file
*stream
)
1778 struct block
*b
= NULL
;
1781 register struct symbol
*sym
;
1783 /* Offset of next stack argument beyond the one we have seen that is
1784 at the highest offset.
1785 -1 if we haven't come to a stack argument yet. */
1786 long highest_offset
= -1;
1788 /* Number of ints of arguments that we have printed so far. */
1789 int args_printed
= 0;
1790 struct cleanup
*old_chain
, *list_chain
;
1791 struct ui_stream
*stb
;
1793 stb
= ui_out_stream_new (uiout
);
1794 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1798 b
= SYMBOL_BLOCK_VALUE (func
);
1799 /* Function blocks are order sensitive, and thus should not be
1801 gdb_assert (BLOCK_HASHTABLE (b
) == 0);
1803 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1807 /* Keep track of the highest stack argument offset seen, and
1808 skip over any kinds of symbols we don't care about. */
1810 switch (SYMBOL_CLASS (sym
))
1815 long current_offset
= SYMBOL_VALUE (sym
);
1816 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1818 /* Compute address of next argument by adding the size of
1819 this argument and rounding to an int boundary. */
1821 ((current_offset
+ arg_size
+ sizeof (int) - 1)
1822 & ~(sizeof (int) - 1));
1824 /* If this is the highest offset seen yet, set highest_offset. */
1825 if (highest_offset
== -1
1826 || (current_offset
> highest_offset
))
1827 highest_offset
= current_offset
;
1829 /* Add the number of ints we're about to print to args_printed. */
1830 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1833 /* We care about types of symbols, but don't need to keep track of
1834 stack offsets in them. */
1836 case LOC_REGPARM_ADDR
:
1838 case LOC_BASEREG_ARG
:
1841 /* Other types of symbols we just skip over. */
1846 /* We have to look up the symbol because arguments can have
1847 two entries (one a parameter, one a local) and the one we
1848 want is the local, which lookup_symbol will find for us.
1849 This includes gcc1 (not gcc2) on the sparc when passing a
1850 small structure and gcc2 when the argument type is float
1851 and it is passed as a double and converted to float by
1852 the prologue (in the latter case the type of the LOC_ARG
1853 symbol is double and the type of the LOC_LOCAL symbol is
1855 /* But if the parameter name is null, don't try it.
1856 Null parameter names occur on the RS/6000, for traceback tables.
1857 FIXME, should we even print them? */
1859 if (*SYMBOL_NAME (sym
))
1861 struct symbol
*nsym
;
1862 nsym
= lookup_symbol
1864 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1865 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
1867 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
1868 it was passed on the stack and loaded into a register,
1869 or passed in a register and stored in a stack slot.
1870 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
1872 Reasons for using the LOC_ARG:
1873 (1) because find_saved_registers may be slow for remote
1875 (2) because registers are often re-used and stack slots
1876 rarely (never?) are. Therefore using the stack slot is
1877 much less likely to print garbage.
1879 Reasons why we might want to use the LOC_REGISTER:
1880 (1) So that the backtrace prints the same value as
1881 "print foo". I see no compelling reason why this needs
1882 to be the case; having the backtrace print the value which
1883 was passed in, and "print foo" print the value as modified
1884 within the called function, makes perfect sense to me.
1886 Additional note: It might be nice if "info args" displayed
1888 One more note: There is a case with sparc structure passing
1889 where we need to use the LOC_REGISTER, but this is dealt with
1890 by creating a single LOC_REGPARM in symbol reading. */
1892 /* Leave sym (the LOC_ARG) alone. */
1899 /* Print the current arg. */
1901 ui_out_text (uiout
, ", ");
1902 ui_out_wrap_hint (uiout
, " ");
1904 annotate_arg_begin ();
1906 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
1907 fprintf_symbol_filtered (stb
->stream
, SYMBOL_SOURCE_NAME (sym
),
1908 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
1909 ui_out_field_stream (uiout
, "name", stb
);
1910 annotate_arg_name_end ();
1911 ui_out_text (uiout
, "=");
1913 /* Avoid value_print because it will deref ref parameters. We just
1914 want to print their addresses. Print ??? for args whose address
1915 we do not know. We pass 2 as "recurse" to val_print because our
1916 standard indentation here is 4 spaces, and val_print indents
1917 2 for each recurse. */
1918 val
= read_var_value (sym
, fi
);
1920 annotate_arg_value (val
== NULL
? NULL
: VALUE_TYPE (val
));
1924 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
1925 VALUE_ADDRESS (val
),
1926 stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
1927 ui_out_field_stream (uiout
, "value", stb
);
1930 ui_out_text (uiout
, "???");
1932 /* Invoke ui_out_tuple_end. */
1933 do_cleanups (list_chain
);
1935 annotate_arg_end ();
1941 /* Don't print nameless args in situations where we don't know
1942 enough about the stack to find them. */
1947 if (highest_offset
== -1)
1948 start
= FRAME_ARGS_SKIP
;
1950 start
= highest_offset
;
1952 print_frame_nameless_args (fi
, start
, num
- args_printed
,
1955 do_cleanups (old_chain
);
1958 /* Print nameless args on STREAM.
1959 FI is the frameinfo for this frame, START is the offset
1960 of the first nameless arg, and NUM is the number of nameless args to
1961 print. FIRST is nonzero if this is the first argument (not just
1962 the first nameless arg). */
1965 print_frame_nameless_args (struct frame_info
*fi
, long start
, int num
,
1966 int first
, struct ui_file
*stream
)
1972 for (i
= 0; i
< num
; i
++)
1975 #ifdef NAMELESS_ARG_VALUE
1976 NAMELESS_ARG_VALUE (fi
, start
, &arg_value
);
1978 argsaddr
= FRAME_ARGS_ADDRESS (fi
);
1982 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
1986 fprintf_filtered (stream
, ", ");
1988 #ifdef PRINT_NAMELESS_INTEGER
1989 PRINT_NAMELESS_INTEGER (stream
, arg_value
);
1991 #ifdef PRINT_TYPELESS_INTEGER
1992 PRINT_TYPELESS_INTEGER (stream
, builtin_type_int
, (LONGEST
) arg_value
);
1994 fprintf_filtered (stream
, "%ld", arg_value
);
1995 #endif /* PRINT_TYPELESS_INTEGER */
1996 #endif /* PRINT_NAMELESS_INTEGER */
1998 start
+= sizeof (int);
2004 printf_command (char *arg
, int from_tty
)
2006 register char *f
= NULL
;
2007 register char *s
= arg
;
2008 char *string
= NULL
;
2009 struct value
**val_args
;
2011 char *current_substring
;
2013 int allocated_args
= 20;
2014 struct cleanup
*old_cleanups
;
2016 val_args
= (struct value
**) xmalloc (allocated_args
2017 * sizeof (struct value
*));
2018 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
2021 error_no_arg ("format-control string and values to print");
2023 /* Skip white space before format string */
2024 while (*s
== ' ' || *s
== '\t')
2027 /* A format string should follow, enveloped in double quotes */
2029 error ("Bad format string, missing '\"'.");
2031 /* Parse the format-control string and copy it into the string STRING,
2032 processing some kinds of escape sequence. */
2034 f
= string
= (char *) alloca (strlen (s
) + 1);
2042 error ("Bad format string, non-terminated '\"'.");
2075 /* ??? TODO: handle other escape sequences */
2076 error ("Unrecognized escape character \\%c in format string.",
2086 /* Skip over " and following space and comma. */
2089 while (*s
== ' ' || *s
== '\t')
2092 if (*s
!= ',' && *s
!= 0)
2093 error ("Invalid argument syntax");
2097 while (*s
== ' ' || *s
== '\t')
2100 /* Need extra space for the '\0's. Doubling the size is sufficient. */
2101 substrings
= alloca (strlen (string
) * 2);
2102 current_substring
= substrings
;
2105 /* Now scan the string for %-specs and see what kinds of args they want.
2106 argclass[I] classifies the %-specs so we can give printf_filtered
2107 something of the right size. */
2111 no_arg
, int_arg
, string_arg
, double_arg
, long_long_arg
2113 enum argclass
*argclass
;
2114 enum argclass this_argclass
;
2120 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
2128 while (strchr ("0123456789.hlL-+ #", *f
))
2130 if (*f
== 'l' || *f
== 'L')
2137 this_argclass
= string_arg
;
2143 this_argclass
= double_arg
;
2147 error ("`*' not supported for precision or width in printf");
2150 error ("Format specifier `n' not supported in printf");
2153 this_argclass
= no_arg
;
2158 this_argclass
= long_long_arg
;
2160 this_argclass
= int_arg
;
2164 if (this_argclass
!= no_arg
)
2166 strncpy (current_substring
, last_arg
, f
- last_arg
);
2167 current_substring
+= f
- last_arg
;
2168 *current_substring
++ = '\0';
2170 argclass
[nargs_wanted
++] = this_argclass
;
2174 /* Now, parse all arguments and evaluate them.
2175 Store the VALUEs in VAL_ARGS. */
2180 if (nargs
== allocated_args
)
2181 val_args
= (struct value
**) xrealloc ((char *) val_args
,
2182 (allocated_args
*= 2)
2183 * sizeof (struct value
*));
2185 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
2187 /* If format string wants a float, unchecked-convert the value to
2188 floating point of the same size */
2190 if (argclass
[nargs
] == double_arg
)
2192 struct type
*type
= VALUE_TYPE (val_args
[nargs
]);
2193 if (TYPE_LENGTH (type
) == sizeof (float))
2194 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
2195 if (TYPE_LENGTH (type
) == sizeof (double))
2196 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
2204 if (nargs
!= nargs_wanted
)
2205 error ("Wrong number of arguments for specified format-string");
2207 /* Now actually print them. */
2208 current_substring
= substrings
;
2209 for (i
= 0; i
< nargs
; i
++)
2211 switch (argclass
[i
])
2218 tem
= value_as_address (val_args
[i
]);
2220 /* This is a %s argument. Find the length of the string. */
2225 read_memory (tem
+ j
, &c
, 1);
2230 /* Copy the string contents into a string inside GDB. */
2231 str
= (char *) alloca (j
+ 1);
2233 read_memory (tem
, str
, j
);
2236 printf_filtered (current_substring
, str
);
2241 double val
= value_as_double (val_args
[i
]);
2242 printf_filtered (current_substring
, val
);
2246 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2248 long long val
= value_as_long (val_args
[i
]);
2249 printf_filtered (current_substring
, val
);
2253 error ("long long not supported in printf");
2257 /* FIXME: there should be separate int_arg and long_arg. */
2258 long val
= value_as_long (val_args
[i
]);
2259 printf_filtered (current_substring
, val
);
2262 default: /* purecov: deadcode */
2263 error ("internal error in printf_command"); /* purecov: deadcode */
2265 /* Skip to the next substring. */
2266 current_substring
+= strlen (current_substring
) + 1;
2268 /* Print the portion of the format string after the last argument. */
2269 printf_filtered (last_arg
);
2271 do_cleanups (old_cleanups
);
2274 /* Dump a specified section of assembly code. With no command line
2275 arguments, this command will dump the assembly code for the
2276 function surrounding the pc value in the selected frame. With one
2277 argument, it will dump the assembly code surrounding that pc value.
2278 Two arguments are interpeted as bounds within which to dump
2283 disassemble_command (char *arg
, int from_tty
)
2285 CORE_ADDR low
, high
;
2287 CORE_ADDR pc
, pc_masked
;
2296 if (!selected_frame
)
2297 error ("No frame selected.\n");
2299 pc
= get_frame_pc (selected_frame
);
2300 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2301 error ("No function contains program counter for selected frame.\n");
2303 else if (tui_version
)
2304 low
= tuiGetLowDisassemblyAddress (low
, pc
);
2306 low
+= FUNCTION_START_OFFSET
;
2308 else if (!(space_index
= (char *) strchr (arg
, ' ')))
2311 pc
= parse_and_eval_address (arg
);
2312 if (find_pc_partial_function (pc
, &name
, &low
, &high
) == 0)
2313 error ("No function contains specified address.\n");
2315 else if (tui_version
)
2316 low
= tuiGetLowDisassemblyAddress (low
, pc
);
2318 low
+= FUNCTION_START_OFFSET
;
2322 /* Two arguments. */
2323 *space_index
= '\0';
2324 low
= parse_and_eval_address (arg
);
2325 high
= parse_and_eval_address (space_index
+ 1);
2329 if (!tui_is_window_visible (DISASSEM_WIN
))
2332 printf_filtered ("Dump of assembler code ");
2335 printf_filtered ("for function %s:\n", name
);
2339 printf_filtered ("from ");
2340 print_address_numeric (low
, 1, gdb_stdout
);
2341 printf_filtered (" to ");
2342 print_address_numeric (high
, 1, gdb_stdout
);
2343 printf_filtered (":\n");
2346 /* Dump the specified range. */
2349 #ifdef GDB_TARGET_MASK_DISAS_PC
2350 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2355 while (pc_masked
< high
)
2358 print_address (pc_masked
, gdb_stdout
);
2359 printf_filtered (":\t");
2360 /* We often wrap here if there are long symbolic names. */
2362 pc
+= print_insn (pc
, gdb_stdout
);
2363 printf_filtered ("\n");
2365 #ifdef GDB_TARGET_MASK_DISAS_PC
2366 pc_masked
= GDB_TARGET_MASK_DISAS_PC (pc
);
2371 printf_filtered ("End of assembler dump.\n");
2372 gdb_flush (gdb_stdout
);
2377 tui_show_assembly (low
);
2382 /* Print the instruction at address MEMADDR in debugged memory,
2383 on STREAM. Returns length of the instruction, in bytes. */
2386 print_insn (CORE_ADDR memaddr
, struct ui_file
*stream
)
2388 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
2389 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_BIG
;
2391 TARGET_PRINT_INSN_INFO
->endian
= BFD_ENDIAN_LITTLE
;
2393 if (TARGET_ARCHITECTURE
!= NULL
)
2394 TARGET_PRINT_INSN_INFO
->mach
= TARGET_ARCHITECTURE
->mach
;
2395 /* else: should set .mach=0 but some disassemblers don't grok this */
2397 TARGET_PRINT_INSN_INFO
->stream
= stream
;
2399 return TARGET_PRINT_INSN (memaddr
, TARGET_PRINT_INSN_INFO
);
2404 _initialize_printcmd (void)
2406 struct cmd_list_element
*c
;
2408 current_display_number
= -1;
2410 add_info ("address", address_info
,
2411 "Describe where symbol SYM is stored.");
2413 add_info ("symbol", sym_info
,
2414 "Describe what symbol is at location ADDR.\n\
2415 Only for symbols with fixed locations (global or static scope).");
2417 add_com ("x", class_vars
, x_command
,
2418 concat ("Examine memory: x/FMT ADDRESS.\n\
2419 ADDRESS is an expression for the memory address to examine.\n\
2420 FMT is a repeat count followed by a format letter and a size letter.\n\
2421 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2422 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2423 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2424 The specified number of objects of the specified size are printed\n\
2425 according to the format.\n\n\
2426 Defaults for format and size letters are those previously used.\n\
2427 Default count is 1. Default address is following last thing printed\n\
2428 with this command or \"print\".", NULL
));
2430 c
= add_com ("disassemble", class_vars
, disassemble_command
,
2431 "Disassemble a specified section of memory.\n\
2432 Default is the function surrounding the pc of the selected frame.\n\
2433 With a single argument, the function surrounding that address is dumped.\n\
2434 Two arguments are taken as a range of memory to dump.");
2435 set_cmd_completer (c
, location_completer
);
2437 add_com_alias ("va", "disassemble", class_xdb
, 0);
2440 add_com ("whereis", class_vars
, whereis_command
,
2441 "Print line number and file of definition of variable.");
2444 add_info ("display", display_info
,
2445 "Expressions to display when program stops, with code numbers.");
2447 add_cmd ("undisplay", class_vars
, undisplay_command
,
2448 "Cancel some expressions to be displayed when program stops.\n\
2449 Arguments are the code numbers of the expressions to stop displaying.\n\
2450 No argument means cancel all automatic-display expressions.\n\
2451 \"delete display\" has the same effect as this command.\n\
2452 Do \"info display\" to see current list of code numbers.",
2455 add_com ("display", class_vars
, display_command
,
2456 "Print value of expression EXP each time the program stops.\n\
2457 /FMT may be used before EXP as in the \"print\" command.\n\
2458 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2459 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2460 and examining is done as in the \"x\" command.\n\n\
2461 With no argument, display all currently requested auto-display expressions.\n\
2462 Use \"undisplay\" to cancel display requests previously made."
2465 add_cmd ("display", class_vars
, enable_display
,
2466 "Enable some expressions to be displayed when program stops.\n\
2467 Arguments are the code numbers of the expressions to resume displaying.\n\
2468 No argument means enable all automatic-display expressions.\n\
2469 Do \"info display\" to see current list of code numbers.", &enablelist
);
2471 add_cmd ("display", class_vars
, disable_display_command
,
2472 "Disable some expressions to be displayed when program stops.\n\
2473 Arguments are the code numbers of the expressions to stop displaying.\n\
2474 No argument means disable all automatic-display expressions.\n\
2475 Do \"info display\" to see current list of code numbers.", &disablelist
);
2477 add_cmd ("display", class_vars
, undisplay_command
,
2478 "Cancel some expressions to be displayed when program stops.\n\
2479 Arguments are the code numbers of the expressions to stop displaying.\n\
2480 No argument means cancel all automatic-display expressions.\n\
2481 Do \"info display\" to see current list of code numbers.", &deletelist
);
2483 add_com ("printf", class_vars
, printf_command
,
2484 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2485 This is useful for formatted output in user-defined commands.");
2487 add_com ("output", class_vars
, output_command
,
2488 "Like \"print\" but don't put in value history and don't print newline.\n\
2489 This is useful in user-defined commands.");
2491 add_prefix_cmd ("set", class_vars
, set_command
,
2492 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2493 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2494 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2495 with $), a register (a few standard names starting with $), or an actual\n\
2496 variable in the program being debugged. EXP is any valid expression.\n",
2497 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2498 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2499 You can see these environment settings with the \"show\" command.", NULL
),
2500 &setlist
, "set ", 1, &cmdlist
);
2502 add_com ("assign", class_vars
, set_command
, concat ("Evaluate expression \
2503 EXP and assign result to variable VAR, using assignment\n\
2504 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2505 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2506 with $), a register (a few standard names starting with $), or an actual\n\
2507 variable in the program being debugged. EXP is any valid expression.\n",
2508 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2509 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2510 You can see these environment settings with the \"show\" command.", NULL
));
2512 /* "call" is the same as "set", but handy for dbx users to call fns. */
2513 c
= add_com ("call", class_vars
, call_command
,
2514 "Call a function in the program.\n\
2515 The argument is the function name and arguments, in the notation of the\n\
2516 current working language. The result is printed and saved in the value\n\
2517 history, if it is not void.");
2518 set_cmd_completer (c
, location_completer
);
2520 add_cmd ("variable", class_vars
, set_command
,
2521 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2522 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2523 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2524 with $), a register (a few standard names starting with $), or an actual\n\
2525 variable in the program being debugged. EXP is any valid expression.\n\
2526 This may usually be abbreviated to simply \"set\".",
2529 c
= add_com ("print", class_vars
, print_command
,
2530 concat ("Print value of expression EXP.\n\
2531 Variables accessible are those of the lexical environment of the selected\n\
2532 stack frame, plus all those whose scope is global or an entire file.\n\
2534 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2535 $$NUM refers to NUM'th value back from the last one.\n\
2536 Names starting with $ refer to registers (with the values they would have\n",
2537 "if the program were to return to the stack frame now selected, restoring\n\
2538 all registers saved by frames farther in) or else to debugger\n\
2539 \"convenience\" variables (any such name not a known register).\n\
2540 Use assignment expressions to give values to convenience variables.\n",
2542 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2543 @ is a binary operator for treating consecutive data objects\n\
2544 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2545 element is FOO, whose second element is stored in the space following\n\
2546 where FOO is stored, etc. FOO must be an expression whose value\n\
2547 resides in memory.\n",
2549 EXP may be preceded with /FMT, where FMT is a format letter\n\
2550 but no count or size letter (see \"x\" command).", NULL
));
2551 set_cmd_completer (c
, location_completer
);
2552 add_com_alias ("p", "print", class_vars
, 1);
2554 c
= add_com ("inspect", class_vars
, inspect_command
,
2555 "Same as \"print\" command, except that if you are running in the epoch\n\
2556 environment, the value is printed in its own window.");
2557 set_cmd_completer (c
, location_completer
);
2560 add_set_cmd ("max-symbolic-offset", no_class
, var_uinteger
,
2561 (char *) &max_symbolic_offset
,
2562 "Set the largest offset that will be printed in <symbol+1234> form.",
2566 add_set_cmd ("symbol-filename", no_class
, var_boolean
,
2567 (char *) &print_symbol_filename
,
2568 "Set printing of source filename and line number with <symbol>.",
2572 /* For examine/instruction a single byte quantity is specified as
2573 the data. This avoids problems with value_at_lazy() requiring a
2574 valid data type (and rejecting VOID). */
2575 examine_i_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_i_type", NULL
);
2577 examine_b_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_b_type", NULL
);
2578 examine_h_type
= init_type (TYPE_CODE_INT
, 2, 0, "examine_h_type", NULL
);
2579 examine_w_type
= init_type (TYPE_CODE_INT
, 4, 0, "examine_w_type", NULL
);
2580 examine_g_type
= init_type (TYPE_CODE_INT
, 8, 0, "examine_g_type", NULL
);