1 /* Support for printing Java values for GDB, the GNU debugger.
2 Copyright 1997-2000 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., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
25 #include "expression.h"
36 static void java_print_value_fields (struct type
* type
, char *valaddr
,
38 struct ui_file
*stream
, int format
,
40 enum val_prettyprint pretty
);
44 java_value_print (value_ptr val
, struct ui_file
*stream
, int format
,
45 enum val_prettyprint pretty
)
52 type
= VALUE_TYPE (val
);
53 address
= VALUE_ADDRESS (val
) + VALUE_OFFSET (val
);
55 if (is_object_type (type
))
59 /* Get the run-time type, and cast the object into that */
61 obj_addr
= unpack_pointer (type
, VALUE_CONTENTS (val
));
65 type
= type_from_class (java_class_from_object (val
));
66 type
= lookup_pointer_type (type
);
68 val
= value_at (type
, address
, NULL
);
72 if (TYPE_CODE (type
) == TYPE_CODE_PTR
&& !value_logical_not (val
))
73 type_print (TYPE_TARGET_TYPE (type
), "", stream
, -1);
75 name
= TYPE_TAG_NAME (type
);
76 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
&& name
!= NULL
77 && (i
= strlen (name
), name
[i
- 1] == ']'))
81 unsigned int things_printed
= 0;
83 struct type
*el_type
= java_primitive_type_from_name (name
, i
- 2);
86 read_memory (address
+ JAVA_OBJECT_SIZE
, buf4
, 4);
88 length
= (long) extract_signed_integer (buf4
, 4);
89 fprintf_filtered (stream
, "{length: %ld", length
);
93 CORE_ADDR element
, next_element
;
95 address
+= JAVA_OBJECT_SIZE
+ 4; /* Skip object header and length. */
97 while (i
< length
&& things_printed
< print_max
)
101 buf
= alloca (TARGET_PTR_BIT
/ HOST_CHAR_BIT
);
102 fputs_filtered (", ", stream
);
103 wrap_here (n_spaces (2));
106 element
= next_element
;
109 read_memory (address
, buf
, sizeof (buf
));
110 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
111 element
= extract_address (buf
, sizeof (buf
));
114 for (reps
= 1; i
+ reps
< length
; reps
++)
116 read_memory (address
, buf
, sizeof (buf
));
117 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
118 next_element
= extract_address (buf
, sizeof (buf
));
119 if (next_element
!= element
)
124 fprintf_filtered (stream
, "%d: ", i
);
126 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
129 fprintf_filtered (stream
, "null");
131 fprintf_filtered (stream
, "@%s", paddr_nz (element
));
139 value_ptr v
= allocate_value (el_type
);
140 value_ptr next_v
= allocate_value (el_type
);
142 VALUE_ADDRESS (v
) = address
+ JAVA_OBJECT_SIZE
+ 4;
143 VALUE_ADDRESS (next_v
) = VALUE_ADDRESS (v
);
145 while (i
< length
&& things_printed
< print_max
)
147 fputs_filtered (", ", stream
);
148 wrap_here (n_spaces (2));
161 VALUE_OFFSET (v
) = 0;
164 VALUE_OFFSET (next_v
) = VALUE_OFFSET (v
);
166 for (reps
= 1; i
+ reps
< length
; reps
++)
168 VALUE_LAZY (next_v
) = 1;
169 VALUE_OFFSET (next_v
) += TYPE_LENGTH (el_type
);
170 if (memcmp (VALUE_CONTENTS (v
), VALUE_CONTENTS (next_v
),
171 TYPE_LENGTH (el_type
)) != 0)
176 fprintf_filtered (stream
, "%d: ", i
);
178 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
180 val_print (VALUE_TYPE (v
), VALUE_CONTENTS (v
), 0, 0,
181 stream
, format
, 2, 1, pretty
);
189 fprintf_filtered (stream
, "...");
191 fprintf_filtered (stream
, "}");
196 /* If it's type String, print it */
198 if (TYPE_CODE (type
) == TYPE_CODE_PTR
199 && TYPE_TARGET_TYPE (type
)
200 && TYPE_NAME (TYPE_TARGET_TYPE (type
))
201 && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type
)), "java.lang.String") == 0
202 && (format
== 0 || format
== 's')
204 && value_as_pointer (val
) != 0)
208 value_ptr boffset_val
;
209 unsigned long boffset
;
214 mark
= value_mark (); /* Remember start of new values */
216 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
217 data
= value_as_pointer (data_val
);
219 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
220 boffset
= value_as_pointer (boffset_val
);
222 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
223 count
= value_as_pointer (count_val
);
225 value_free_to_mark (mark
); /* Release unnecessary values */
227 val_print_string (data
+ boffset
, count
, 2, stream
);
232 return (val_print (type
, VALUE_CONTENTS (val
), 0, address
,
233 stream
, format
, 1, 0, pretty
));
236 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
237 same meanings as in cp_print_value and c_val_print.
239 DONT_PRINT is an array of baseclass types that we
240 should not print, or zero if called from top level. */
243 java_print_value_fields (struct type
*type
, char *valaddr
, CORE_ADDR address
,
244 struct ui_file
*stream
, int format
, int recurse
,
245 enum val_prettyprint pretty
)
247 int i
, len
, n_baseclasses
;
249 CHECK_TYPEDEF (type
);
251 fprintf_filtered (stream
, "{");
252 len
= TYPE_NFIELDS (type
);
253 n_baseclasses
= TYPE_N_BASECLASSES (type
);
255 if (n_baseclasses
> 0)
257 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
259 for (i
= 0; i
< n_baseclasses
; i
++)
262 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
263 char *basename
= TYPE_NAME (baseclass
);
266 if (BASETYPE_VIA_VIRTUAL (type
, i
))
269 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
276 fprintf_filtered (stream
, "\n");
277 print_spaces_filtered (2 * (recurse
+ 1), stream
);
279 fputs_filtered ("<", stream
);
280 /* Not sure what the best notation is in the case where there is no
282 fputs_filtered (basename
? basename
: "", stream
);
283 fputs_filtered ("> = ", stream
);
285 base_valaddr
= valaddr
;
287 java_print_value_fields (baseclass
, base_valaddr
, address
+ boffset
,
288 stream
, format
, recurse
+ 1, pretty
);
289 fputs_filtered (", ", stream
);
297 if (!len
&& n_baseclasses
== 1)
298 fprintf_filtered (stream
, "<No data fields>");
301 extern int inspect_it
;
304 for (i
= n_baseclasses
; i
< len
; i
++)
306 /* If requested, skip printing of static fields. */
307 if (TYPE_FIELD_STATIC (type
, i
))
309 char *name
= TYPE_FIELD_NAME (type
, i
);
310 if (!static_field_print
)
312 if (name
!= NULL
&& strcmp (name
, "class") == 0)
316 fprintf_filtered (stream
, ", ");
317 else if (n_baseclasses
> 0)
321 fprintf_filtered (stream
, "\n");
322 print_spaces_filtered (2 + 2 * recurse
, stream
);
323 fputs_filtered ("members of ", stream
);
324 fputs_filtered (type_name_no_tag (type
), stream
);
325 fputs_filtered (": ", stream
);
332 fprintf_filtered (stream
, "\n");
333 print_spaces_filtered (2 + 2 * recurse
, stream
);
337 wrap_here (n_spaces (2 + 2 * recurse
));
341 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
342 fputs_filtered ("\"( ptr \"", stream
);
344 fputs_filtered ("\"( nodef \"", stream
);
345 if (TYPE_FIELD_STATIC (type
, i
))
346 fputs_filtered ("static ", stream
);
347 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
349 DMGL_PARAMS
| DMGL_ANSI
);
350 fputs_filtered ("\" \"", stream
);
351 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
353 DMGL_PARAMS
| DMGL_ANSI
);
354 fputs_filtered ("\") \"", stream
);
358 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
360 if (TYPE_FIELD_STATIC (type
, i
))
361 fputs_filtered ("static ", stream
);
362 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
364 DMGL_PARAMS
| DMGL_ANSI
);
365 annotate_field_name_end ();
366 fputs_filtered (": ", stream
);
367 annotate_field_value ();
370 if (!TYPE_FIELD_STATIC (type
, i
) && TYPE_FIELD_PACKED (type
, i
))
374 /* Bitfields require special handling, especially due to byte
376 if (TYPE_FIELD_IGNORE (type
, i
))
378 fputs_filtered ("<optimized out or zero length>", stream
);
382 v
= value_from_longest (TYPE_FIELD_TYPE (type
, i
),
383 unpack_field_as_long (type
, valaddr
, i
));
385 val_print (TYPE_FIELD_TYPE (type
, i
), VALUE_CONTENTS (v
), 0,
386 0, stream
, format
, 0, recurse
+ 1, pretty
);
391 if (TYPE_FIELD_IGNORE (type
, i
))
393 fputs_filtered ("<optimized out or zero length>", stream
);
395 else if (TYPE_FIELD_STATIC (type
, i
))
397 value_ptr v
= value_static_field (type
, i
);
399 fputs_filtered ("<optimized out>", stream
);
402 struct type
*t
= check_typedef (VALUE_TYPE (v
));
403 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
405 val_print (VALUE_TYPE (v
),
406 VALUE_CONTENTS (v
), 0, VALUE_ADDRESS (v
),
407 stream
, format
, 0, recurse
+ 1, pretty
);
410 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
411 fputs_filtered ("<unknown type>", stream
);
414 val_print (TYPE_FIELD_TYPE (type
, i
),
415 valaddr
+ TYPE_FIELD_BITPOS (type
, i
) / 8, 0,
416 address
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
417 stream
, format
, 0, recurse
+ 1, pretty
);
420 annotate_field_end ();
425 fprintf_filtered (stream
, "\n");
426 print_spaces_filtered (2 * recurse
, stream
);
429 fprintf_filtered (stream
, "}");
432 /* Print data of type TYPE located at VALADDR (within GDB), which came from
433 the inferior at address ADDRESS, onto stdio stream STREAM according to
434 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
437 If the data are a string pointer, returns the number of string characters
440 If DEREF_REF is nonzero, then dereference references, otherwise just print
443 The PRETTY parameter controls prettyprinting. */
446 java_val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
447 CORE_ADDR address
, struct ui_file
*stream
, int format
,
448 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
450 register unsigned int i
= 0; /* Number of characters printed */
451 struct type
*target_type
;
454 CHECK_TYPEDEF (type
);
455 switch (TYPE_CODE (type
))
458 if (format
&& format
!= 's')
460 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
464 if (vtblprint
&& cp_is_vtbl_ptr_type (type
))
466 /* Print the unmangled name if desired. */
467 /* Print vtable entry - we only get here if we ARE using
468 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
469 print_address_demangle (extract_address (valaddr
, TYPE_LENGTH (type
)),
474 addr
= unpack_pointer (type
, valaddr
);
477 fputs_filtered ("null", stream
);
480 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
482 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
484 /* Try to print what function it points to. */
485 print_address_demangle (addr
, stream
, demangle
);
486 /* Return value is irrelevant except for string pointers. */
490 if (addressprint
&& format
!= 's')
492 fputs_filtered ("@", stream
);
493 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
499 format
= format
? format
: output_format
;
501 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
503 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
), stream
);
507 /* Can't just call c_val_print because that print bytes as C chars. */
508 format
= format
? format
: output_format
;
510 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
512 val_print_type_code_int (type
, valaddr
, stream
);
515 case TYPE_CODE_STRUCT
:
516 java_print_value_fields (type
, valaddr
, address
, stream
, format
,
521 return c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
522 format
, deref_ref
, recurse
, pretty
);
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