1 /* Support for printing C values for GDB, the GNU debugger.
2 Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
24 #include "expression.h"
32 extern int vtblprint
; /* Controls printing of vtbl's */
33 extern int demangle
; /* whether to print C++ syms raw or src-form */
36 cp_print_class_member
PARAMS ((char *, struct type
*, GDB_FILE
*, char *));
39 cp_print_class_method
PARAMS ((char *, struct type
*, GDB_FILE
*));
42 cp_print_value_fields
PARAMS ((struct type
*, char *, GDB_FILE
*, int, int,
43 enum val_prettyprint
, struct type
**));
46 cp_is_vtbl_ptr_type
PARAMS ((struct type
*));
49 cp_is_vtbl_member
PARAMS ((struct type
*));
54 /* BEGIN-FIXME: Hooks into c-typeprint.c */
57 c_type_print_varspec_prefix
PARAMS ((struct type
*, GDB_FILE
*, int, int));
60 cp_type_print_method_args
PARAMS ((struct type
**, char *, char *, int,
65 extern struct obstack dont_print_obstack
;
68 /* Print data of type TYPE located at VALADDR (within GDB), which came from
69 the inferior at address ADDRESS, onto stdio stream STREAM according to
70 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
73 If the data are a string pointer, returns the number of string characters
76 If DEREF_REF is nonzero, then dereference references, otherwise just print
79 The PRETTY parameter controls prettyprinting. */
82 c_val_print (type
, valaddr
, address
, stream
, format
, deref_ref
, recurse
,
91 enum val_prettyprint pretty
;
93 register unsigned int i
= 0; /* Number of characters printed */
100 switch (TYPE_CODE (type
))
102 case TYPE_CODE_ARRAY
:
103 if (TYPE_LENGTH (type
) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type
)) > 0)
105 elttype
= TYPE_TARGET_TYPE (type
);
106 eltlen
= TYPE_LENGTH (elttype
);
107 len
= TYPE_LENGTH (type
) / eltlen
;
108 if (prettyprint_arrays
)
110 print_spaces_filtered (2 + 2 * recurse
, stream
);
112 /* For an array of chars, print with string syntax. */
113 if (eltlen
== 1 && TYPE_CODE (elttype
) == TYPE_CODE_INT
114 && (format
== 0 || format
== 's'))
116 LA_PRINT_STRING (stream
, valaddr
, len
, 0);
121 fprintf_filtered (stream
, "{");
122 /* If this is a virtual function table, print the 0th
123 entry specially, and the rest of the members normally. */
124 if (cp_is_vtbl_ptr_type (elttype
))
127 fprintf_filtered (stream
, "%d vtable entries", len
- 1);
133 val_print_array_elements (type
, valaddr
, address
, stream
,
134 format
, deref_ref
, recurse
, pretty
, i
);
135 fprintf_filtered (stream
, "}");
139 /* Array of unspecified length: treat like pointer to first elt. */
141 goto print_unpacked_pointer
;
144 if (format
&& format
!= 's')
146 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
149 if (vtblprint
&& cp_is_vtbl_ptr_type(type
))
151 /* Print the unmangled name if desired. */
152 /* Print vtable entry - we only get here if we ARE using
153 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
154 print_address_demangle(extract_address (valaddr
, TYPE_LENGTH (type
)),
158 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_METHOD
)
160 cp_print_class_method (valaddr
, type
, stream
);
162 else if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_MEMBER
)
164 cp_print_class_member (valaddr
,
165 TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type
)),
170 addr
= unpack_pointer (type
, valaddr
);
171 print_unpacked_pointer
:
172 elttype
= TYPE_TARGET_TYPE (type
);
174 if (TYPE_CODE (elttype
) == TYPE_CODE_FUNC
)
176 /* Try to print what function it points to. */
177 print_address_demangle (addr
, stream
, demangle
);
178 /* Return value is irrelevant except for string pointers. */
182 if (addressprint
&& format
!= 's')
184 print_address_numeric (addr
, 1, stream
);
187 /* For a pointer to char or unsigned char, also print the string
188 pointed to, unless pointer is null. */
189 if (TYPE_LENGTH (elttype
) == 1
190 && TYPE_CODE (elttype
) == TYPE_CODE_INT
191 && (format
== 0 || format
== 's')
194 i
= val_print_string (addr
, 0, stream
);
196 else if (cp_is_vtbl_member(type
))
198 /* print vtbl's nicely */
199 CORE_ADDR vt_address
= unpack_pointer (type
, valaddr
);
201 struct minimal_symbol
*msymbol
=
202 lookup_minimal_symbol_by_pc (vt_address
);
203 if ((msymbol
!= NULL
) &&
204 (vt_address
== SYMBOL_VALUE_ADDRESS (msymbol
)))
206 fputs_filtered (" <", stream
);
207 fputs_filtered (SYMBOL_SOURCE_NAME (msymbol
), stream
);
208 fputs_filtered (">", stream
);
210 if (vt_address
&& vtblprint
)
213 struct symbol
*wsym
= (struct symbol
*)NULL
;
216 struct block
*block
= (struct block
*)NULL
;
220 wsym
= lookup_symbol (SYMBOL_NAME(msymbol
), block
,
221 VAR_NAMESPACE
, &is_this_fld
, &s
);
225 wtype
= SYMBOL_TYPE(wsym
);
229 wtype
= TYPE_TARGET_TYPE(type
);
231 vt_val
= value_at (wtype
, vt_address
);
232 val_print (VALUE_TYPE (vt_val
), VALUE_CONTENTS (vt_val
),
233 VALUE_ADDRESS (vt_val
), stream
, format
,
234 deref_ref
, recurse
+ 1, pretty
);
237 fprintf_filtered (stream
, "\n");
238 print_spaces_filtered (2 + 2 * recurse
, stream
);
243 /* Return number of characters printed, including the terminating
244 '\0' if we reached the end. val_print_string takes care including
245 the terminating '\0' if necessary. */
250 case TYPE_CODE_MEMBER
:
251 error ("not implemented: member type in c_val_print");
255 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_MEMBER
)
257 cp_print_class_member (valaddr
,
258 TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type
)),
264 fprintf_filtered (stream
, "@");
265 print_address_numeric
266 (extract_address (valaddr
,
267 TARGET_PTR_BIT
/ HOST_CHAR_BIT
), 1, stream
);
269 fputs_filtered (": ", stream
);
271 /* De-reference the reference. */
274 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_UNDEF
)
276 value_ptr deref_val
=
278 (TYPE_TARGET_TYPE (type
),
279 unpack_pointer (lookup_pointer_type (builtin_type_void
),
281 val_print (VALUE_TYPE (deref_val
),
282 VALUE_CONTENTS (deref_val
),
283 VALUE_ADDRESS (deref_val
), stream
, format
,
284 deref_ref
, recurse
+ 1, pretty
);
287 fputs_filtered ("???", stream
);
291 case TYPE_CODE_UNION
:
292 if (recurse
&& !unionprint
)
294 fprintf_filtered (stream
, "{...}");
298 case TYPE_CODE_STRUCT
:
299 if (vtblprint
&& cp_is_vtbl_ptr_type(type
))
301 /* Print the unmangled name if desired. */
302 /* Print vtable entry - we only get here if NOT using
303 -fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */
304 print_address_demangle(*((int *) (valaddr
+ /* FIXME bytesex */
305 TYPE_FIELD_BITPOS (type
, VTBL_FNADDR_OFFSET
) / 8)),
309 cp_print_value_fields (type
, valaddr
, stream
, format
, recurse
, pretty
,
316 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
319 len
= TYPE_NFIELDS (type
);
320 val
= unpack_long (type
, valaddr
);
321 for (i
= 0; i
< len
; i
++)
324 if (val
== TYPE_FIELD_BITPOS (type
, i
))
331 fputs_filtered (TYPE_FIELD_NAME (type
, i
), stream
);
335 print_longest (stream
, 'd', 0, val
);
342 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
345 /* FIXME, we should consider, at least for ANSI C language, eliminating
346 the distinction made between FUNCs and POINTERs to FUNCs. */
347 fprintf_filtered (stream
, "{");
348 type_print (type
, "", stream
, -1);
349 fprintf_filtered (stream
, "} ");
350 /* Try to print what function it points to, and its address. */
351 print_address_demangle (address
, stream
, demangle
);
355 /* Do something at least vaguely reasonable, for example if the
356 language is set wrong. */
358 case TYPE_CODE_RANGE
:
359 /* FIXME: create_range_type does not set the unsigned bit in a
360 range type (I think it probably should copy it from the target
361 type), so we won't print values which are too large to
362 fit in a signed integer correctly. */
363 /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
364 print with the target type, though, because the size of our type
365 and the target type might differ). */
369 format
= format
? format
: output_format
;
372 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
376 val_print_type_code_int (type
, valaddr
, stream
);
377 /* C and C++ has no single byte int type, char is used instead.
378 Since we don't know whether the value is really intended to
379 be used as an integer or a character, print the character
380 equivalent as well. */
381 if (TYPE_LENGTH (type
) == 1)
383 fputs_filtered (" ", stream
);
384 LA_PRINT_CHAR ((unsigned char) unpack_long (type
, valaddr
),
391 format
= format
? format
: output_format
;
394 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
398 fprintf_filtered (stream
, TYPE_UNSIGNED (type
) ? "%u" : "%d",
399 unpack_long (type
, valaddr
));
400 fputs_filtered (" ", stream
);
401 LA_PRINT_CHAR ((unsigned char) unpack_long (type
, valaddr
), stream
);
408 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
412 print_floating (valaddr
, type
, stream
);
417 fprintf_filtered (stream
, "void");
420 case TYPE_CODE_ERROR
:
421 fprintf_filtered (stream
, "<error type>");
424 case TYPE_CODE_UNDEF
:
425 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
426 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
427 and no complete type for struct foo in that file. */
428 fprintf_filtered (stream
, "<incomplete type>");
432 error ("Invalid C/C++ type code %d in symbol table.", TYPE_CODE (type
));
439 c_value_print (val
, stream
, format
, pretty
)
443 enum val_prettyprint pretty
;
445 /* A "repeated" value really contains several values in a row.
446 They are made by the @ operator.
447 Print such values as if they were arrays. */
449 if (VALUE_REPEATED (val
))
451 register unsigned int n
= VALUE_REPETITIONS (val
);
452 register unsigned int typelen
= TYPE_LENGTH (VALUE_TYPE (val
));
453 fprintf_filtered (stream
, "{");
454 /* Print arrays of characters using string syntax. */
455 if (typelen
== 1 && TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_INT
457 LA_PRINT_STRING (stream
, VALUE_CONTENTS (val
), n
, 0);
460 value_print_array_elements (val
, stream
, format
, pretty
);
462 fprintf_filtered (stream
, "}");
463 return (n
* typelen
);
467 struct type
*type
= VALUE_TYPE (val
);
469 /* If it is a pointer, indicate what it points to.
471 Print type also if it is a reference.
473 C++: if it is a member pointer, we will take care
474 of that when we print it. */
475 if (TYPE_CODE (type
) == TYPE_CODE_PTR
||
476 TYPE_CODE (type
) == TYPE_CODE_REF
)
478 /* Hack: remove (char *) for char strings. Their
479 type is indicated by the quoted string anyway. */
480 if (TYPE_CODE (type
) == TYPE_CODE_PTR
&&
481 TYPE_LENGTH (TYPE_TARGET_TYPE (type
)) == sizeof(char) &&
482 TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_INT
&&
483 !TYPE_UNSIGNED (TYPE_TARGET_TYPE (type
)))
489 fprintf_filtered (stream
, "(");
490 type_print (type
, "", stream
, -1);
491 fprintf_filtered (stream
, ") ");
494 return (val_print (type
, VALUE_CONTENTS (val
),
495 VALUE_ADDRESS (val
), stream
, format
, 1, 0, pretty
));