Commit | Line | Data |
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a8a69e63 | 1 | /* Support for printing C values for GDB, the GNU debugger. |
67e9b3b3 PS |
2 | Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994 |
3 | Free Software Foundation, Inc. | |
a8a69e63 FF |
4 | |
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. */ | |
20 | ||
21 | #include "defs.h" | |
22 | #include "symtab.h" | |
23 | #include "gdbtypes.h" | |
24 | #include "expression.h" | |
25 | #include "value.h" | |
26 | #include "demangle.h" | |
27 | #include "valprint.h" | |
28 | #include "language.h" | |
29 | ||
30 | /* BEGIN-FIXME */ | |
31 | ||
32 | extern int vtblprint; /* Controls printing of vtbl's */ | |
33 | extern int demangle; /* whether to print C++ syms raw or src-form */ | |
34 | ||
35 | extern void | |
199b2450 | 36 | cp_print_class_member PARAMS ((char *, struct type *, GDB_FILE *, char *)); |
a8a69e63 | 37 | |
c7da3ed3 | 38 | extern void |
199b2450 | 39 | cp_print_class_method PARAMS ((char *, struct type *, GDB_FILE *)); |
a8a69e63 FF |
40 | |
41 | extern void | |
199b2450 | 42 | cp_print_value_fields PARAMS ((struct type *, char *, GDB_FILE *, int, int, |
a8a69e63 FF |
43 | enum val_prettyprint, struct type **)); |
44 | ||
c7da3ed3 FF |
45 | extern int |
46 | cp_is_vtbl_ptr_type PARAMS ((struct type *)); | |
47 | ||
a8a69e63 FF |
48 | extern int |
49 | cp_is_vtbl_member PARAMS ((struct type *)); | |
50 | ||
51 | /* END-FIXME */ | |
52 | ||
53 | ||
54 | /* BEGIN-FIXME: Hooks into c-typeprint.c */ | |
55 | ||
56 | extern void | |
199b2450 | 57 | c_type_print_varspec_prefix PARAMS ((struct type *, GDB_FILE *, int, int)); |
a8a69e63 FF |
58 | |
59 | extern void | |
60 | cp_type_print_method_args PARAMS ((struct type **, char *, char *, int, | |
199b2450 | 61 | GDB_FILE *)); |
a8a69e63 FF |
62 | /* END-FIXME */ |
63 | ||
64 | ||
65 | extern struct obstack dont_print_obstack; | |
66 | ||
67 | \f | |
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 | |
71 | target byte order. | |
72 | ||
73 | If the data are a string pointer, returns the number of string characters | |
74 | printed. | |
75 | ||
76 | If DEREF_REF is nonzero, then dereference references, otherwise just print | |
77 | them like pointers. | |
78 | ||
79 | The PRETTY parameter controls prettyprinting. */ | |
80 | ||
81 | int | |
82 | c_val_print (type, valaddr, address, stream, format, deref_ref, recurse, | |
83 | pretty) | |
84 | struct type *type; | |
85 | char *valaddr; | |
86 | CORE_ADDR address; | |
199b2450 | 87 | GDB_FILE *stream; |
a8a69e63 FF |
88 | int format; |
89 | int deref_ref; | |
90 | int recurse; | |
91 | enum val_prettyprint pretty; | |
92 | { | |
c4413e2c | 93 | register unsigned int i = 0; /* Number of characters printed */ |
a8a69e63 FF |
94 | unsigned len; |
95 | struct type *elttype; | |
96 | unsigned eltlen; | |
97 | LONGEST val; | |
c4413e2c | 98 | CORE_ADDR addr; |
a8a69e63 FF |
99 | |
100 | switch (TYPE_CODE (type)) | |
101 | { | |
102 | case TYPE_CODE_ARRAY: | |
103 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0) | |
104 | { | |
105 | elttype = TYPE_TARGET_TYPE (type); | |
106 | eltlen = TYPE_LENGTH (elttype); | |
107 | len = TYPE_LENGTH (type) / eltlen; | |
108 | if (prettyprint_arrays) | |
109 | { | |
110 | print_spaces_filtered (2 + 2 * recurse, stream); | |
111 | } | |
a8a69e63 FF |
112 | /* For an array of chars, print with string syntax. */ |
113 | if (eltlen == 1 && TYPE_CODE (elttype) == TYPE_CODE_INT | |
c4413e2c | 114 | && (format == 0 || format == 's')) |
a8a69e63 FF |
115 | { |
116 | LA_PRINT_STRING (stream, valaddr, len, 0); | |
ec16f701 | 117 | i = len; |
a8a69e63 FF |
118 | } |
119 | else | |
120 | { | |
c4413e2c | 121 | fprintf_filtered (stream, "{"); |
a8a69e63 FF |
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)) | |
125 | { | |
126 | i = 1; | |
127 | fprintf_filtered (stream, "%d vtable entries", len - 1); | |
128 | } | |
129 | else | |
130 | { | |
131 | i = 0; | |
132 | } | |
133 | val_print_array_elements (type, valaddr, address, stream, | |
134 | format, deref_ref, recurse, pretty, i); | |
c4413e2c | 135 | fprintf_filtered (stream, "}"); |
a8a69e63 | 136 | } |
a8a69e63 FF |
137 | break; |
138 | } | |
139 | /* Array of unspecified length: treat like pointer to first elt. */ | |
1326dace JK |
140 | addr = address; |
141 | goto print_unpacked_pointer; | |
a8a69e63 FF |
142 | |
143 | case TYPE_CODE_PTR: | |
144 | if (format && format != 's') | |
145 | { | |
146 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
147 | break; | |
148 | } | |
149 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_METHOD) | |
150 | { | |
c7da3ed3 | 151 | cp_print_class_method (valaddr, type, stream); |
a8a69e63 FF |
152 | } |
153 | else if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER) | |
154 | { | |
155 | cp_print_class_member (valaddr, | |
156 | TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)), | |
157 | stream, "&"); | |
158 | } | |
159 | else | |
160 | { | |
c4413e2c | 161 | addr = unpack_pointer (type, valaddr); |
1326dace | 162 | print_unpacked_pointer: |
a8a69e63 FF |
163 | elttype = TYPE_TARGET_TYPE (type); |
164 | ||
165 | if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) | |
166 | { | |
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. */ | |
170 | return (0); | |
171 | } | |
172 | ||
173 | if (addressprint && format != 's') | |
174 | { | |
833e0d94 | 175 | print_address_numeric (addr, stream); |
a8a69e63 FF |
176 | } |
177 | ||
178 | /* For a pointer to char or unsigned char, also print the string | |
179 | pointed to, unless pointer is null. */ | |
c4413e2c FF |
180 | if (TYPE_LENGTH (elttype) == 1 |
181 | && TYPE_CODE (elttype) == TYPE_CODE_INT | |
182 | && (format == 0 || format == 's') | |
183 | && addr != 0) | |
a8a69e63 | 184 | { |
c4413e2c | 185 | i = val_print_string (addr, 0, stream); |
a8a69e63 FF |
186 | } |
187 | else if (cp_is_vtbl_member(type)) | |
188 | { | |
189 | /* print vtbl's nicely */ | |
190 | CORE_ADDR vt_address = unpack_pointer (type, valaddr); | |
191 | ||
192 | struct minimal_symbol *msymbol = | |
193 | lookup_minimal_symbol_by_pc (vt_address); | |
2e4964ad FF |
194 | if ((msymbol != NULL) && |
195 | (vt_address == SYMBOL_VALUE_ADDRESS (msymbol))) | |
a8a69e63 FF |
196 | { |
197 | fputs_filtered (" <", stream); | |
2e4964ad | 198 | fputs_filtered (SYMBOL_SOURCE_NAME (msymbol), stream); |
a8a69e63 FF |
199 | fputs_filtered (">", stream); |
200 | } | |
40f24469 | 201 | if (vt_address && vtblprint) |
a8a69e63 | 202 | { |
82a2edfb | 203 | value_ptr vt_val; |
1bd97ba8 KH |
204 | struct symbol *wsym = (struct symbol *)NULL; |
205 | struct type *wtype; | |
206 | struct symtab *s; | |
207 | struct block *block = (struct block *)NULL; | |
208 | int is_this_fld; | |
209 | ||
40f24469 KH |
210 | if (msymbol != NULL) |
211 | wsym = lookup_symbol (SYMBOL_NAME(msymbol), block, | |
1bd97ba8 KH |
212 | VAR_NAMESPACE, &is_this_fld, &s); |
213 | ||
214 | if (wsym) | |
215 | { | |
216 | wtype = SYMBOL_TYPE(wsym); | |
217 | } | |
218 | else | |
219 | { | |
220 | wtype = TYPE_TARGET_TYPE(type); | |
221 | } | |
222 | vt_val = value_at (wtype, vt_address); | |
a8a69e63 FF |
223 | val_print (VALUE_TYPE (vt_val), VALUE_CONTENTS (vt_val), |
224 | VALUE_ADDRESS (vt_val), stream, format, | |
225 | deref_ref, recurse + 1, pretty); | |
226 | if (pretty) | |
227 | { | |
228 | fprintf_filtered (stream, "\n"); | |
229 | print_spaces_filtered (2 + 2 * recurse, stream); | |
230 | } | |
231 | } | |
232 | } | |
233 | ||
79f3d586 JK |
234 | /* Return number of characters printed, including the terminating |
235 | '\0' if we reached the end. val_print_string takes care including | |
236 | the terminating '\0' if necessary. */ | |
237 | return i; | |
a8a69e63 FF |
238 | } |
239 | break; | |
240 | ||
241 | case TYPE_CODE_MEMBER: | |
242 | error ("not implemented: member type in c_val_print"); | |
243 | break; | |
244 | ||
245 | case TYPE_CODE_REF: | |
246 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_MEMBER) | |
247 | { | |
248 | cp_print_class_member (valaddr, | |
249 | TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type)), | |
250 | stream, ""); | |
251 | break; | |
252 | } | |
253 | if (addressprint) | |
254 | { | |
833e0d94 JK |
255 | fprintf_filtered (stream, "@"); |
256 | print_address_numeric | |
257 | (extract_address (valaddr, | |
258 | TARGET_PTR_BIT / HOST_CHAR_BIT), stream); | |
a8a69e63 FF |
259 | if (deref_ref) |
260 | fputs_filtered (": ", stream); | |
261 | } | |
262 | /* De-reference the reference. */ | |
263 | if (deref_ref) | |
264 | { | |
265 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_UNDEF) | |
266 | { | |
82a2edfb | 267 | value_ptr deref_val = |
a8a69e63 FF |
268 | value_at |
269 | (TYPE_TARGET_TYPE (type), | |
270 | unpack_pointer (lookup_pointer_type (builtin_type_void), | |
271 | valaddr)); | |
272 | val_print (VALUE_TYPE (deref_val), | |
273 | VALUE_CONTENTS (deref_val), | |
274 | VALUE_ADDRESS (deref_val), stream, format, | |
275 | deref_ref, recurse + 1, pretty); | |
276 | } | |
277 | else | |
278 | fputs_filtered ("???", stream); | |
279 | } | |
280 | break; | |
281 | ||
282 | case TYPE_CODE_UNION: | |
283 | if (recurse && !unionprint) | |
284 | { | |
285 | fprintf_filtered (stream, "{...}"); | |
286 | break; | |
287 | } | |
288 | /* Fall through. */ | |
289 | case TYPE_CODE_STRUCT: | |
290 | if (vtblprint && cp_is_vtbl_ptr_type(type)) | |
291 | { | |
292 | /* Print the unmangled name if desired. */ | |
293 | print_address_demangle(*((int *) (valaddr + /* FIXME bytesex */ | |
294 | TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8)), | |
295 | stream, demangle); | |
296 | break; | |
297 | } | |
298 | cp_print_value_fields (type, valaddr, stream, format, recurse, pretty, | |
299 | 0); | |
300 | break; | |
301 | ||
302 | case TYPE_CODE_ENUM: | |
303 | if (format) | |
304 | { | |
305 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
306 | break; | |
307 | } | |
308 | len = TYPE_NFIELDS (type); | |
1d9449ab | 309 | val = unpack_long (type, valaddr); |
a8a69e63 FF |
310 | for (i = 0; i < len; i++) |
311 | { | |
312 | QUIT; | |
313 | if (val == TYPE_FIELD_BITPOS (type, i)) | |
314 | { | |
315 | break; | |
316 | } | |
317 | } | |
318 | if (i < len) | |
319 | { | |
320 | fputs_filtered (TYPE_FIELD_NAME (type, i), stream); | |
321 | } | |
322 | else | |
323 | { | |
7efb57c3 | 324 | print_longest (stream, 'd', 0, val); |
a8a69e63 FF |
325 | } |
326 | break; | |
327 | ||
328 | case TYPE_CODE_FUNC: | |
329 | if (format) | |
330 | { | |
331 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
332 | break; | |
333 | } | |
334 | /* FIXME, we should consider, at least for ANSI C language, eliminating | |
335 | the distinction made between FUNCs and POINTERs to FUNCs. */ | |
336 | fprintf_filtered (stream, "{"); | |
337 | type_print (type, "", stream, -1); | |
338 | fprintf_filtered (stream, "} "); | |
339 | /* Try to print what function it points to, and its address. */ | |
340 | print_address_demangle (address, stream, demangle); | |
341 | break; | |
342 | ||
7e71985c JK |
343 | case TYPE_CODE_BOOL: |
344 | /* Do something at least vaguely reasonable, for example if the | |
345 | language is set wrong. */ | |
346 | ||
85b8aa88 JK |
347 | case TYPE_CODE_RANGE: |
348 | /* FIXME: create_range_type does not set the unsigned bit in a | |
349 | range type (I think it probably should copy it from the target | |
350 | type), so we won't print values which are too large to | |
351 | fit in a signed integer correctly. */ | |
352 | /* FIXME: Doesn't handle ranges of enums correctly. (Can't just | |
353 | print with the target type, though, because the size of our type | |
354 | and the target type might differ). */ | |
355 | /* FALLTHROUGH */ | |
356 | ||
a8a69e63 FF |
357 | case TYPE_CODE_INT: |
358 | format = format ? format : output_format; | |
359 | if (format) | |
360 | { | |
361 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
362 | } | |
363 | else | |
364 | { | |
365 | val_print_type_code_int (type, valaddr, stream); | |
366 | /* C and C++ has no single byte int type, char is used instead. | |
367 | Since we don't know whether the value is really intended to | |
368 | be used as an integer or a character, print the character | |
369 | equivalent as well. */ | |
370 | if (TYPE_LENGTH (type) == 1) | |
371 | { | |
372 | fputs_filtered (" ", stream); | |
373 | LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr), | |
374 | stream); | |
375 | } | |
376 | } | |
377 | break; | |
378 | ||
379 | case TYPE_CODE_CHAR: | |
380 | format = format ? format : output_format; | |
381 | if (format) | |
382 | { | |
383 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
384 | } | |
385 | else | |
386 | { | |
387 | fprintf_filtered (stream, TYPE_UNSIGNED (type) ? "%u" : "%d", | |
388 | unpack_long (type, valaddr)); | |
389 | fputs_filtered (" ", stream); | |
390 | LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr), stream); | |
391 | } | |
392 | break; | |
393 | ||
394 | case TYPE_CODE_FLT: | |
395 | if (format) | |
396 | { | |
397 | print_scalar_formatted (valaddr, type, format, 0, stream); | |
398 | } | |
399 | else | |
400 | { | |
401 | print_floating (valaddr, type, stream); | |
402 | } | |
403 | break; | |
404 | ||
405 | case TYPE_CODE_VOID: | |
406 | fprintf_filtered (stream, "void"); | |
407 | break; | |
408 | ||
409 | case TYPE_CODE_ERROR: | |
410 | fprintf_filtered (stream, "<error type>"); | |
411 | break; | |
412 | ||
a8a69e63 FF |
413 | case TYPE_CODE_UNDEF: |
414 | /* This happens (without TYPE_FLAG_STUB set) on systems which don't use | |
415 | dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar" | |
416 | and no complete type for struct foo in that file. */ | |
417 | fprintf_filtered (stream, "<incomplete type>"); | |
418 | break; | |
419 | ||
420 | default: | |
421 | error ("Invalid C/C++ type code %d in symbol table.", TYPE_CODE (type)); | |
422 | } | |
199b2450 | 423 | gdb_flush (stream); |
a8a69e63 FF |
424 | return (0); |
425 | } |