1 /* Support for printing C values for GDB, the GNU debugger.
2 Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "expression.h"
31 extern int vtblprint
; /* Controls printing of vtbl's */
32 extern int demangle
; /* whether to print C++ syms raw or src-form */
35 cp_print_class_member
PARAMS ((char *, struct type
*, FILE *, char *));
38 cp_print_class_method
PARAMS ((char *, struct type
*, FILE *));
41 cp_print_value_fields
PARAMS ((struct type
*, char *, FILE *, int, int,
42 enum val_prettyprint
, struct type
**));
45 cp_is_vtbl_ptr_type
PARAMS ((struct type
*));
48 cp_is_vtbl_member
PARAMS ((struct type
*));
53 /* BEGIN-FIXME: Hooks into c-typeprint.c */
56 c_type_print_varspec_prefix
PARAMS ((struct type
*, FILE *, int, int));
59 cp_type_print_method_args
PARAMS ((struct type
**, char *, char *, int,
64 extern struct obstack dont_print_obstack
;
67 /* Print data of type TYPE located at VALADDR (within GDB), which came from
68 the inferior at address ADDRESS, onto stdio stream STREAM according to
69 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
72 If the data are a string pointer, returns the number of string characters
75 If DEREF_REF is nonzero, then dereference references, otherwise just print
78 The PRETTY parameter controls prettyprinting. */
81 c_val_print (type
, valaddr
, address
, stream
, format
, deref_ref
, recurse
,
90 enum val_prettyprint pretty
;
92 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 (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_METHOD
)
151 cp_print_class_method (valaddr
, type
, stream
);
153 else if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_MEMBER
)
155 cp_print_class_member (valaddr
,
156 TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type
)),
161 addr
= unpack_pointer (type
, valaddr
);
162 print_unpacked_pointer
:
163 elttype
= TYPE_TARGET_TYPE (type
);
165 if (TYPE_CODE (elttype
) == TYPE_CODE_FUNC
)
167 /* Try to print what function it points to. */
168 print_address_demangle (addr
, stream
, demangle
);
169 /* Return value is irrelevant except for string pointers. */
173 if (addressprint
&& format
!= 's')
175 fprintf_filtered (stream
, "0x%x", addr
);
178 /* For a pointer to char or unsigned char, also print the string
179 pointed to, unless pointer is null. */
180 if (TYPE_LENGTH (elttype
) == 1
181 && TYPE_CODE (elttype
) == TYPE_CODE_INT
182 && (format
== 0 || format
== 's')
185 i
= val_print_string (addr
, 0, stream
);
187 else if (cp_is_vtbl_member(type
))
189 /* print vtbl's nicely */
190 CORE_ADDR vt_address
= unpack_pointer (type
, valaddr
);
192 struct minimal_symbol
*msymbol
=
193 lookup_minimal_symbol_by_pc (vt_address
);
194 if ((msymbol
!= NULL
) &&
195 (vt_address
== SYMBOL_VALUE_ADDRESS (msymbol
)))
197 fputs_filtered (" <", stream
);
198 fputs_filtered (SYMBOL_SOURCE_NAME (msymbol
), stream
);
199 fputs_filtered (">", stream
);
205 vt_val
= value_at (TYPE_TARGET_TYPE (type
), vt_address
);
206 val_print (VALUE_TYPE (vt_val
), VALUE_CONTENTS (vt_val
),
207 VALUE_ADDRESS (vt_val
), stream
, format
,
208 deref_ref
, recurse
+ 1, pretty
);
211 fprintf_filtered (stream
, "\n");
212 print_spaces_filtered (2 + 2 * recurse
, stream
);
217 /* Return number of characters printed, plus one for the
218 terminating null if we have "reached the end". */
219 return (i
+ (print_max
&& i
!= print_max
));
223 case TYPE_CODE_MEMBER
:
224 error ("not implemented: member type in c_val_print");
228 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_MEMBER
)
230 cp_print_class_member (valaddr
,
231 TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type
)),
237 fprintf_filtered (stream
, "@0x%lx",
238 unpack_long (builtin_type_int
, valaddr
));
240 fputs_filtered (": ", stream
);
242 /* De-reference the reference. */
245 if (TYPE_CODE (TYPE_TARGET_TYPE (type
)) != TYPE_CODE_UNDEF
)
249 (TYPE_TARGET_TYPE (type
),
250 unpack_pointer (lookup_pointer_type (builtin_type_void
),
252 val_print (VALUE_TYPE (deref_val
),
253 VALUE_CONTENTS (deref_val
),
254 VALUE_ADDRESS (deref_val
), stream
, format
,
255 deref_ref
, recurse
+ 1, pretty
);
258 fputs_filtered ("???", stream
);
262 case TYPE_CODE_UNION
:
263 if (recurse
&& !unionprint
)
265 fprintf_filtered (stream
, "{...}");
269 case TYPE_CODE_STRUCT
:
270 if (vtblprint
&& cp_is_vtbl_ptr_type(type
))
272 /* Print the unmangled name if desired. */
273 print_address_demangle(*((int *) (valaddr
+ /* FIXME bytesex */
274 TYPE_FIELD_BITPOS (type
, VTBL_FNADDR_OFFSET
) / 8)),
278 cp_print_value_fields (type
, valaddr
, stream
, format
, recurse
, pretty
,
285 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
288 len
= TYPE_NFIELDS (type
);
289 val
= unpack_long (type
, valaddr
);
290 for (i
= 0; i
< len
; i
++)
293 if (val
== TYPE_FIELD_BITPOS (type
, i
))
300 fputs_filtered (TYPE_FIELD_NAME (type
, i
), stream
);
304 print_longest (stream
, 'd', 0, val
);
311 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
314 /* FIXME, we should consider, at least for ANSI C language, eliminating
315 the distinction made between FUNCs and POINTERs to FUNCs. */
316 fprintf_filtered (stream
, "{");
317 type_print (type
, "", stream
, -1);
318 fprintf_filtered (stream
, "} ");
319 /* Try to print what function it points to, and its address. */
320 print_address_demangle (address
, stream
, demangle
);
324 /* Do something at least vaguely reasonable, for example if the
325 language is set wrong. */
328 format
= format
? format
: output_format
;
331 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
335 val_print_type_code_int (type
, valaddr
, stream
);
336 /* C and C++ has no single byte int type, char is used instead.
337 Since we don't know whether the value is really intended to
338 be used as an integer or a character, print the character
339 equivalent as well. */
340 if (TYPE_LENGTH (type
) == 1)
342 fputs_filtered (" ", stream
);
343 LA_PRINT_CHAR ((unsigned char) unpack_long (type
, valaddr
),
350 format
= format
? format
: output_format
;
353 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
357 fprintf_filtered (stream
, TYPE_UNSIGNED (type
) ? "%u" : "%d",
358 unpack_long (type
, valaddr
));
359 fputs_filtered (" ", stream
);
360 LA_PRINT_CHAR ((unsigned char) unpack_long (type
, valaddr
), stream
);
367 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
371 print_floating (valaddr
, type
, stream
);
376 fprintf_filtered (stream
, "void");
379 case TYPE_CODE_ERROR
:
380 fprintf_filtered (stream
, "<error type>");
383 case TYPE_CODE_RANGE
:
384 /* FIXME, we should not ever have to print one of these yet. */
385 fprintf_filtered (stream
, "<range type>");
388 case TYPE_CODE_UNDEF
:
389 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
390 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
391 and no complete type for struct foo in that file. */
392 fprintf_filtered (stream
, "<incomplete type>");
396 error ("Invalid C/C++ type code %d in symbol table.", TYPE_CODE (type
));