1 /* Support for printing Java values for GDB, the GNU debugger.
2 Copyright 1997, 1998, 1999, 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 (struct value
*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
);
94 CORE_ADDR next_element
= -1; /* dummy initial value */
96 address
+= JAVA_OBJECT_SIZE
+ 4; /* Skip object header and length. */
98 while (i
< length
&& things_printed
< print_max
)
102 buf
= alloca (TARGET_PTR_BIT
/ HOST_CHAR_BIT
);
103 fputs_filtered (", ", stream
);
104 wrap_here (n_spaces (2));
107 element
= next_element
;
110 read_memory (address
, buf
, sizeof (buf
));
111 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
112 element
= extract_address (buf
, sizeof (buf
));
115 for (reps
= 1; i
+ reps
< length
; reps
++)
117 read_memory (address
, buf
, sizeof (buf
));
118 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
119 next_element
= extract_address (buf
, sizeof (buf
));
120 if (next_element
!= element
)
125 fprintf_filtered (stream
, "%d: ", i
);
127 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
130 fprintf_filtered (stream
, "null");
132 fprintf_filtered (stream
, "@%s", paddr_nz (element
));
140 struct value
*v
= allocate_value (el_type
);
141 struct value
*next_v
= allocate_value (el_type
);
143 VALUE_ADDRESS (v
) = address
+ JAVA_OBJECT_SIZE
+ 4;
144 VALUE_ADDRESS (next_v
) = VALUE_ADDRESS (v
);
146 while (i
< length
&& things_printed
< print_max
)
148 fputs_filtered (", ", stream
);
149 wrap_here (n_spaces (2));
162 VALUE_OFFSET (v
) = 0;
165 VALUE_OFFSET (next_v
) = VALUE_OFFSET (v
);
167 for (reps
= 1; i
+ reps
< length
; reps
++)
169 VALUE_LAZY (next_v
) = 1;
170 VALUE_OFFSET (next_v
) += TYPE_LENGTH (el_type
);
171 if (memcmp (VALUE_CONTENTS (v
), VALUE_CONTENTS (next_v
),
172 TYPE_LENGTH (el_type
)) != 0)
177 fprintf_filtered (stream
, "%d: ", i
);
179 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
181 val_print (VALUE_TYPE (v
), VALUE_CONTENTS (v
), 0, 0,
182 stream
, format
, 2, 1, pretty
);
190 fprintf_filtered (stream
, "...");
192 fprintf_filtered (stream
, "}");
197 /* If it's type String, print it */
199 if (TYPE_CODE (type
) == TYPE_CODE_PTR
200 && TYPE_TARGET_TYPE (type
)
201 && TYPE_NAME (TYPE_TARGET_TYPE (type
))
202 && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type
)), "java.lang.String") == 0
203 && (format
== 0 || format
== 's')
205 && value_as_address (val
) != 0)
207 struct value
*data_val
;
209 struct value
*boffset_val
;
210 unsigned long boffset
;
211 struct value
*count_val
;
215 mark
= value_mark (); /* Remember start of new values */
217 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
218 data
= value_as_address (data_val
);
220 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
221 boffset
= value_as_address (boffset_val
);
223 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
224 count
= value_as_address (count_val
);
226 value_free_to_mark (mark
); /* Release unnecessary values */
228 val_print_string (data
+ boffset
, count
, 2, stream
);
233 return (val_print (type
, VALUE_CONTENTS (val
), 0, address
,
234 stream
, format
, 1, 0, pretty
));
237 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
238 same meanings as in cp_print_value and c_val_print.
240 DONT_PRINT is an array of baseclass types that we
241 should not print, or zero if called from top level. */
244 java_print_value_fields (struct type
*type
, char *valaddr
, CORE_ADDR address
,
245 struct ui_file
*stream
, int format
, int recurse
,
246 enum val_prettyprint pretty
)
248 int i
, len
, n_baseclasses
;
250 CHECK_TYPEDEF (type
);
252 fprintf_filtered (stream
, "{");
253 len
= TYPE_NFIELDS (type
);
254 n_baseclasses
= TYPE_N_BASECLASSES (type
);
256 if (n_baseclasses
> 0)
258 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
260 for (i
= 0; i
< n_baseclasses
; i
++)
263 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
264 char *basename
= TYPE_NAME (baseclass
);
267 if (BASETYPE_VIA_VIRTUAL (type
, i
))
270 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
277 fprintf_filtered (stream
, "\n");
278 print_spaces_filtered (2 * (recurse
+ 1), stream
);
280 fputs_filtered ("<", stream
);
281 /* Not sure what the best notation is in the case where there is no
283 fputs_filtered (basename
? basename
: "", stream
);
284 fputs_filtered ("> = ", stream
);
286 base_valaddr
= valaddr
;
288 java_print_value_fields (baseclass
, base_valaddr
, address
+ boffset
,
289 stream
, format
, recurse
+ 1, pretty
);
290 fputs_filtered (", ", stream
);
298 if (!len
&& n_baseclasses
== 1)
299 fprintf_filtered (stream
, "<No data fields>");
302 extern int inspect_it
;
305 for (i
= n_baseclasses
; i
< len
; i
++)
307 /* If requested, skip printing of static fields. */
308 if (TYPE_FIELD_STATIC (type
, i
))
310 char *name
= TYPE_FIELD_NAME (type
, i
);
311 if (!static_field_print
)
313 if (name
!= NULL
&& strcmp (name
, "class") == 0)
317 fprintf_filtered (stream
, ", ");
318 else if (n_baseclasses
> 0)
322 fprintf_filtered (stream
, "\n");
323 print_spaces_filtered (2 + 2 * recurse
, stream
);
324 fputs_filtered ("members of ", stream
);
325 fputs_filtered (type_name_no_tag (type
), stream
);
326 fputs_filtered (": ", stream
);
333 fprintf_filtered (stream
, "\n");
334 print_spaces_filtered (2 + 2 * recurse
, stream
);
338 wrap_here (n_spaces (2 + 2 * recurse
));
342 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
343 fputs_filtered ("\"( ptr \"", stream
);
345 fputs_filtered ("\"( nodef \"", stream
);
346 if (TYPE_FIELD_STATIC (type
, i
))
347 fputs_filtered ("static ", stream
);
348 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
350 DMGL_PARAMS
| DMGL_ANSI
);
351 fputs_filtered ("\" \"", stream
);
352 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
354 DMGL_PARAMS
| DMGL_ANSI
);
355 fputs_filtered ("\") \"", stream
);
359 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
361 if (TYPE_FIELD_STATIC (type
, i
))
362 fputs_filtered ("static ", stream
);
363 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
365 DMGL_PARAMS
| DMGL_ANSI
);
366 annotate_field_name_end ();
367 fputs_filtered (": ", stream
);
368 annotate_field_value ();
371 if (!TYPE_FIELD_STATIC (type
, i
) && TYPE_FIELD_PACKED (type
, i
))
375 /* Bitfields require special handling, especially due to byte
377 if (TYPE_FIELD_IGNORE (type
, i
))
379 fputs_filtered ("<optimized out or zero length>", stream
);
383 v
= value_from_longest (TYPE_FIELD_TYPE (type
, i
),
384 unpack_field_as_long (type
, valaddr
, i
));
386 val_print (TYPE_FIELD_TYPE (type
, i
), VALUE_CONTENTS (v
), 0,
387 0, stream
, format
, 0, recurse
+ 1, pretty
);
392 if (TYPE_FIELD_IGNORE (type
, i
))
394 fputs_filtered ("<optimized out or zero length>", stream
);
396 else if (TYPE_FIELD_STATIC (type
, i
))
398 struct value
*v
= value_static_field (type
, i
);
400 fputs_filtered ("<optimized out>", stream
);
403 struct type
*t
= check_typedef (VALUE_TYPE (v
));
404 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
406 val_print (VALUE_TYPE (v
),
407 VALUE_CONTENTS (v
), 0, VALUE_ADDRESS (v
),
408 stream
, format
, 0, recurse
+ 1, pretty
);
411 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
412 fputs_filtered ("<unknown type>", stream
);
415 val_print (TYPE_FIELD_TYPE (type
, i
),
416 valaddr
+ TYPE_FIELD_BITPOS (type
, i
) / 8, 0,
417 address
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
418 stream
, format
, 0, recurse
+ 1, pretty
);
421 annotate_field_end ();
426 fprintf_filtered (stream
, "\n");
427 print_spaces_filtered (2 * recurse
, stream
);
430 fprintf_filtered (stream
, "}");
433 /* Print data of type TYPE located at VALADDR (within GDB), which came from
434 the inferior at address ADDRESS, onto stdio stream STREAM according to
435 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
438 If the data are a string pointer, returns the number of string characters
441 If DEREF_REF is nonzero, then dereference references, otherwise just print
444 The PRETTY parameter controls prettyprinting. */
447 java_val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
448 CORE_ADDR address
, struct ui_file
*stream
, int format
,
449 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
451 register unsigned int i
= 0; /* Number of characters printed */
452 struct type
*target_type
;
455 CHECK_TYPEDEF (type
);
456 switch (TYPE_CODE (type
))
459 if (format
&& format
!= 's')
461 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
465 if (vtblprint
&& cp_is_vtbl_ptr_type (type
))
467 /* Print the unmangled name if desired. */
468 /* Print vtable entry - we only get here if we ARE using
469 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
470 print_address_demangle (extract_address (valaddr
, TYPE_LENGTH (type
)),
475 addr
= unpack_pointer (type
, valaddr
);
478 fputs_filtered ("null", stream
);
481 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
483 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
485 /* Try to print what function it points to. */
486 print_address_demangle (addr
, stream
, demangle
);
487 /* Return value is irrelevant except for string pointers. */
491 if (addressprint
&& format
!= 's')
493 fputs_filtered ("@", stream
);
494 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
501 /* Can't just call c_val_print because that prints bytes as C
503 format
= format
? format
: output_format
;
505 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
506 else if (TYPE_CODE (type
) == TYPE_CODE_CHAR
507 || (TYPE_CODE (type
) == TYPE_CODE_INT
508 && TYPE_LENGTH (type
) == 2
509 && strcmp (TYPE_NAME (type
), "char") == 0))
510 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
), 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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