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a8a69e63 FF |
1 | /* Support for printing C values for GDB, the GNU debugger. |
2 | Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GDB. | |
5 | ||
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. | |
10 | ||
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. | |
15 | ||
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. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "symtab.h" | |
22 | #include "gdbtypes.h" | |
23 | #include "expression.h" | |
24 | #include "value.h" | |
25 | #include "demangle.h" | |
26 | #include "valprint.h" | |
27 | #include "language.h" | |
28 | ||
29 | /* BEGIN-FIXME */ | |
30 | ||
31 | extern int vtblprint; /* Controls printing of vtbl's */ | |
32 | extern int demangle; /* whether to print C++ syms raw or src-form */ | |
33 | ||
34 | extern void | |
199b2450 | 35 | cp_print_class_member PARAMS ((char *, struct type *, GDB_FILE *, char *)); |
a8a69e63 | 36 | |
c7da3ed3 | 37 | extern void |
199b2450 | 38 | cp_print_class_method PARAMS ((char *, struct type *, GDB_FILE *)); |
a8a69e63 FF |
39 | |
40 | extern void | |
199b2450 | 41 | cp_print_value_fields PARAMS ((struct type *, char *, GDB_FILE *, int, int, |
a8a69e63 FF |
42 | enum val_prettyprint, struct type **)); |
43 | ||
c7da3ed3 FF |
44 | extern int |
45 | cp_is_vtbl_ptr_type PARAMS ((struct type *)); | |
46 | ||
a8a69e63 FF |
47 | extern int |
48 | cp_is_vtbl_member PARAMS ((struct type *)); | |
49 | ||
50 | /* END-FIXME */ | |
51 | ||
52 | ||
53 | /* BEGIN-FIXME: Hooks into c-typeprint.c */ | |
54 | ||
55 | extern void | |
199b2450 | 56 | c_type_print_varspec_prefix PARAMS ((struct type *, GDB_FILE *, int, int)); |
a8a69e63 FF |
57 | |
58 | extern void | |
59 | cp_type_print_method_args PARAMS ((struct type **, char *, char *, int, | |
199b2450 | 60 | GDB_FILE *)); |
a8a69e63 FF |
61 | /* END-FIXME */ |
62 | ||
63 | ||
64 | extern struct obstack dont_print_obstack; | |
65 | ||
66 | \f | |
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 | |
70 | target byte order. | |
71 | ||
72 | If the data are a string pointer, returns the number of string characters | |
73 | printed. | |
74 | ||
75 | If DEREF_REF is nonzero, then dereference references, otherwise just print | |
76 | them like pointers. | |
77 | ||
78 | The PRETTY parameter controls prettyprinting. */ | |
79 | ||
80 | int | |
81 | c_val_print (type, valaddr, address, stream, format, deref_ref, recurse, | |
82 | pretty) | |
83 | struct type *type; | |
84 | char *valaddr; | |
85 | CORE_ADDR address; | |
199b2450 | 86 | GDB_FILE *stream; |
a8a69e63 FF |
87 | int format; |
88 | int deref_ref; | |
89 | int recurse; | |
90 | enum val_prettyprint pretty; | |
91 | { | |
c4413e2c | 92 | register unsigned int i = 0; /* Number of characters printed */ |
a8a69e63 FF |
93 | unsigned len; |
94 | struct type *elttype; | |
95 | unsigned eltlen; | |
96 | LONGEST val; | |
c4413e2c | 97 | CORE_ADDR addr; |
a8a69e63 FF |
98 | |
99 | switch (TYPE_CODE (type)) | |
100 | { | |
101 | case TYPE_CODE_ARRAY: | |
102 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0) | |
103 | { | |
104 | elttype = TYPE_TARGET_TYPE (type); | |
105 | eltlen = TYPE_LENGTH (elttype); | |
106 | len = TYPE_LENGTH (type) / eltlen; | |
107 | if (prettyprint_arrays) | |
108 | { | |
109 | print_spaces_filtered (2 + 2 * recurse, stream); | |
110 | } | |
a8a69e63 FF |
111 | /* For an array of chars, print with string syntax. */ |
112 | if (eltlen == 1 && TYPE_CODE (elttype) == TYPE_CODE_INT | |
c4413e2c | 113 | && (format == 0 || format == 's')) |
a8a69e63 FF |
114 | { |
115 | LA_PRINT_STRING (stream, valaddr, len, 0); | |
ec16f701 | 116 | i = len; |
a8a69e63 FF |
117 | } |
118 | else | |
119 | { | |
c4413e2c | 120 | fprintf_filtered (stream, "{"); |
a8a69e63 FF |
121 | /* If this is a virtual function table, print the 0th |
122 | entry specially, and the rest of the members normally. */ | |
123 | if (cp_is_vtbl_ptr_type (elttype)) | |
124 | { | |
125 | i = 1; | |
126 | fprintf_filtered (stream, "%d vtable entries", len - 1); | |
127 | } | |
128 | else | |
129 | { | |
130 | i = 0; | |
131 | } | |
132 | val_print_array_elements (type, valaddr, address, stream, | |
133 | format, deref_ref, recurse, pretty, i); | |
c4413e2c | 134 | fprintf_filtered (stream, "}"); |
a8a69e63 | 135 | } |
a8a69e63 FF |
136 | break; |
137 | } | |
138 | /* Array of unspecified length: treat like pointer to first elt. */ | |
1326dace JK |
139 | addr = address; |
140 | goto print_unpacked_pointer; | |
a8a69e63 FF |
141 | |
142 | case TYPE_CODE_PTR: | |
143 | if (format && format != 's') | |
144 | { | |
145 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
146 | break; | |
147 | } | |
148 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD) | |
149 | { | |
c7da3ed3 | 150 | cp_print_class_method (valaddr, type, stream); |
a8a69e63 FF |
151 | } |
152 | else if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER) | |
153 | { | |
154 | cp_print_class_member (valaddr, | |
155 | TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)), | |
156 | stream, "&"); | |
157 | } | |
158 | else | |
159 | { | |
c4413e2c | 160 | addr = unpack_pointer (type, valaddr); |
1326dace | 161 | print_unpacked_pointer: |
a8a69e63 FF |
162 | elttype = TYPE_TARGET_TYPE (type); |
163 | ||
164 | if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) | |
165 | { | |
166 | /* Try to print what function it points to. */ | |
167 | print_address_demangle (addr, stream, demangle); | |
168 | /* Return value is irrelevant except for string pointers. */ | |
169 | return (0); | |
170 | } | |
171 | ||
172 | if (addressprint && format != 's') | |
173 | { | |
5573d7d4 | 174 | fprintf_filtered (stream, "0x%lx", (unsigned long)addr); |
a8a69e63 FF |
175 | } |
176 | ||
177 | /* For a pointer to char or unsigned char, also print the string | |
178 | pointed to, unless pointer is null. */ | |
c4413e2c FF |
179 | if (TYPE_LENGTH (elttype) == 1 |
180 | && TYPE_CODE (elttype) == TYPE_CODE_INT | |
181 | && (format == 0 || format == 's') | |
182 | && addr != 0) | |
a8a69e63 | 183 | { |
c4413e2c | 184 | i = val_print_string (addr, 0, stream); |
a8a69e63 FF |
185 | } |
186 | else if (cp_is_vtbl_member(type)) | |
187 | { | |
188 | /* print vtbl's nicely */ | |
189 | CORE_ADDR vt_address = unpack_pointer (type, valaddr); | |
190 | ||
191 | struct minimal_symbol *msymbol = | |
192 | lookup_minimal_symbol_by_pc (vt_address); | |
2e4964ad FF |
193 | if ((msymbol != NULL) && |
194 | (vt_address == SYMBOL_VALUE_ADDRESS (msymbol))) | |
a8a69e63 FF |
195 | { |
196 | fputs_filtered (" <", stream); | |
2e4964ad | 197 | fputs_filtered (SYMBOL_SOURCE_NAME (msymbol), stream); |
a8a69e63 FF |
198 | fputs_filtered (">", stream); |
199 | } | |
200 | if (vtblprint) | |
201 | { | |
202 | value vt_val; | |
1bd97ba8 KH |
203 | struct symbol *wsym = (struct symbol *)NULL; |
204 | struct type *wtype; | |
205 | struct symtab *s; | |
206 | struct block *block = (struct block *)NULL; | |
207 | int is_this_fld; | |
208 | ||
209 | ||
210 | wsym = lookup_symbol (SYMBOL_NAME(msymbol), block, | |
211 | VAR_NAMESPACE, &is_this_fld, &s); | |
212 | ||
213 | if (wsym) | |
214 | { | |
215 | wtype = SYMBOL_TYPE(wsym); | |
216 | } | |
217 | else | |
218 | { | |
219 | wtype = TYPE_TARGET_TYPE(type); | |
220 | } | |
221 | vt_val = value_at (wtype, vt_address); | |
a8a69e63 FF |
222 | val_print (VALUE_TYPE (vt_val), VALUE_CONTENTS (vt_val), |
223 | VALUE_ADDRESS (vt_val), stream, format, | |
224 | deref_ref, recurse + 1, pretty); | |
225 | if (pretty) | |
226 | { | |
227 | fprintf_filtered (stream, "\n"); | |
228 | print_spaces_filtered (2 + 2 * recurse, stream); | |
229 | } | |
230 | } | |
231 | } | |
232 | ||
233 | /* Return number of characters printed, plus one for the | |
234 | terminating null if we have "reached the end". */ | |
235 | return (i + (print_max && i != print_max)); | |
236 | } | |
237 | break; | |
238 | ||
239 | case TYPE_CODE_MEMBER: | |
240 | error ("not implemented: member type in c_val_print"); | |
241 | break; | |
242 | ||
243 | case TYPE_CODE_REF: | |
244 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER) | |
245 | { | |
246 | cp_print_class_member (valaddr, | |
247 | TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)), | |
248 | stream, ""); | |
249 | break; | |
250 | } | |
251 | if (addressprint) | |
252 | { | |
253 | fprintf_filtered (stream, "@0x%lx", | |
254 | unpack_long (builtin_type_int, valaddr)); | |
255 | if (deref_ref) | |
256 | fputs_filtered (": ", stream); | |
257 | } | |
258 | /* De-reference the reference. */ | |
259 | if (deref_ref) | |
260 | { | |
261 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_UNDEF) | |
262 | { | |
263 | value deref_val = | |
264 | value_at | |
265 | (TYPE_TARGET_TYPE (type), | |
266 | unpack_pointer (lookup_pointer_type (builtin_type_void), | |
267 | valaddr)); | |
268 | val_print (VALUE_TYPE (deref_val), | |
269 | VALUE_CONTENTS (deref_val), | |
270 | VALUE_ADDRESS (deref_val), stream, format, | |
271 | deref_ref, recurse + 1, pretty); | |
272 | } | |
273 | else | |
274 | fputs_filtered ("???", stream); | |
275 | } | |
276 | break; | |
277 | ||
278 | case TYPE_CODE_UNION: | |
279 | if (recurse && !unionprint) | |
280 | { | |
281 | fprintf_filtered (stream, "{...}"); | |
282 | break; | |
283 | } | |
284 | /* Fall through. */ | |
285 | case TYPE_CODE_STRUCT: | |
286 | if (vtblprint && cp_is_vtbl_ptr_type(type)) | |
287 | { | |
288 | /* Print the unmangled name if desired. */ | |
289 | print_address_demangle(*((int *) (valaddr + /* FIXME bytesex */ | |
290 | TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8)), | |
291 | stream, demangle); | |
292 | break; | |
293 | } | |
294 | cp_print_value_fields (type, valaddr, stream, format, recurse, pretty, | |
295 | 0); | |
296 | break; | |
297 | ||
298 | case TYPE_CODE_ENUM: | |
299 | if (format) | |
300 | { | |
301 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
302 | break; | |
303 | } | |
304 | len = TYPE_NFIELDS (type); | |
1d9449ab | 305 | val = unpack_long (type, valaddr); |
a8a69e63 FF |
306 | for (i = 0; i < len; i++) |
307 | { | |
308 | QUIT; | |
309 | if (val == TYPE_FIELD_BITPOS (type, i)) | |
310 | { | |
311 | break; | |
312 | } | |
313 | } | |
314 | if (i < len) | |
315 | { | |
316 | fputs_filtered (TYPE_FIELD_NAME (type, i), stream); | |
317 | } | |
318 | else | |
319 | { | |
7efb57c3 | 320 | print_longest (stream, 'd', 0, val); |
a8a69e63 FF |
321 | } |
322 | break; | |
323 | ||
324 | case TYPE_CODE_FUNC: | |
325 | if (format) | |
326 | { | |
327 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
328 | break; | |
329 | } | |
330 | /* FIXME, we should consider, at least for ANSI C language, eliminating | |
331 | the distinction made between FUNCs and POINTERs to FUNCs. */ | |
332 | fprintf_filtered (stream, "{"); | |
333 | type_print (type, "", stream, -1); | |
334 | fprintf_filtered (stream, "} "); | |
335 | /* Try to print what function it points to, and its address. */ | |
336 | print_address_demangle (address, stream, demangle); | |
337 | break; | |
338 | ||
7e71985c JK |
339 | case TYPE_CODE_BOOL: |
340 | /* Do something at least vaguely reasonable, for example if the | |
341 | language is set wrong. */ | |
342 | ||
a8a69e63 FF |
343 | case TYPE_CODE_INT: |
344 | format = format ? format : output_format; | |
345 | if (format) | |
346 | { | |
347 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
348 | } | |
349 | else | |
350 | { | |
351 | val_print_type_code_int (type, valaddr, stream); | |
352 | /* C and C++ has no single byte int type, char is used instead. | |
353 | Since we don't know whether the value is really intended to | |
354 | be used as an integer or a character, print the character | |
355 | equivalent as well. */ | |
356 | if (TYPE_LENGTH (type) == 1) | |
357 | { | |
358 | fputs_filtered (" ", stream); | |
359 | LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr), | |
360 | stream); | |
361 | } | |
362 | } | |
363 | break; | |
364 | ||
365 | case TYPE_CODE_CHAR: | |
366 | format = format ? format : output_format; | |
367 | if (format) | |
368 | { | |
369 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
370 | } | |
371 | else | |
372 | { | |
373 | fprintf_filtered (stream, TYPE_UNSIGNED (type) ? "%u" : "%d", | |
374 | unpack_long (type, valaddr)); | |
375 | fputs_filtered (" ", stream); | |
376 | LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr), stream); | |
377 | } | |
378 | break; | |
379 | ||
380 | case TYPE_CODE_FLT: | |
381 | if (format) | |
382 | { | |
383 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
384 | } | |
385 | else | |
386 | { | |
387 | print_floating (valaddr, type, stream); | |
388 | } | |
389 | break; | |
390 | ||
391 | case TYPE_CODE_VOID: | |
392 | fprintf_filtered (stream, "void"); | |
393 | break; | |
394 | ||
395 | case TYPE_CODE_ERROR: | |
396 | fprintf_filtered (stream, "<error type>"); | |
397 | break; | |
398 | ||
399 | case TYPE_CODE_RANGE: | |
400 | /* FIXME, we should not ever have to print one of these yet. */ | |
401 | fprintf_filtered (stream, "<range type>"); | |
402 | break; | |
403 | ||
404 | case TYPE_CODE_UNDEF: | |
405 | /* This happens (without TYPE_FLAG_STUB set) on systems which don't use | |
406 | dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar" | |
407 | and no complete type for struct foo in that file. */ | |
408 | fprintf_filtered (stream, "<incomplete type>"); | |
409 | break; | |
410 | ||
411 | default: | |
412 | error ("Invalid C/C++ type code %d in symbol table.", TYPE_CODE (type)); | |
413 | } | |
199b2450 | 414 | gdb_flush (stream); |
a8a69e63 FF |
415 | return (0); |
416 | } |