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"
33 #include "gdb_string.h"
37 static void java_print_value_fields (struct type
* type
, char *valaddr
,
39 struct ui_file
*stream
, int format
,
41 enum val_prettyprint pretty
);
45 java_value_print (struct value
*val
, struct ui_file
*stream
, int format
,
46 enum val_prettyprint pretty
)
53 type
= VALUE_TYPE (val
);
54 address
= VALUE_ADDRESS (val
) + VALUE_OFFSET (val
);
56 if (is_object_type (type
))
60 /* Get the run-time type, and cast the object into that */
62 obj_addr
= unpack_pointer (type
, VALUE_CONTENTS (val
));
66 type
= type_from_class (java_class_from_object (val
));
67 type
= lookup_pointer_type (type
);
69 val
= value_at (type
, address
, NULL
);
73 if (TYPE_CODE (type
) == TYPE_CODE_PTR
&& !value_logical_not (val
))
74 type_print (TYPE_TARGET_TYPE (type
), "", stream
, -1);
76 name
= TYPE_TAG_NAME (type
);
77 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
&& name
!= NULL
78 && (i
= strlen (name
), name
[i
- 1] == ']'))
82 unsigned int things_printed
= 0;
84 struct type
*el_type
= java_primitive_type_from_name (name
, i
- 2);
87 read_memory (address
+ JAVA_OBJECT_SIZE
, buf4
, 4);
89 length
= (long) extract_signed_integer (buf4
, 4);
90 fprintf_filtered (stream
, "{length: %ld", length
);
95 CORE_ADDR next_element
= -1; /* dummy initial value */
97 address
+= JAVA_OBJECT_SIZE
+ 4; /* Skip object header and length. */
99 while (i
< length
&& things_printed
< print_max
)
103 buf
= alloca (TARGET_PTR_BIT
/ HOST_CHAR_BIT
);
104 fputs_filtered (", ", stream
);
105 wrap_here (n_spaces (2));
108 element
= next_element
;
111 read_memory (address
, buf
, sizeof (buf
));
112 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
113 element
= extract_address (buf
, sizeof (buf
));
116 for (reps
= 1; i
+ reps
< length
; reps
++)
118 read_memory (address
, buf
, sizeof (buf
));
119 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
120 next_element
= extract_address (buf
, sizeof (buf
));
121 if (next_element
!= element
)
126 fprintf_filtered (stream
, "%d: ", i
);
128 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
131 fprintf_filtered (stream
, "null");
133 fprintf_filtered (stream
, "@%s", paddr_nz (element
));
141 struct value
*v
= allocate_value (el_type
);
142 struct value
*next_v
= allocate_value (el_type
);
144 VALUE_ADDRESS (v
) = address
+ JAVA_OBJECT_SIZE
+ 4;
145 VALUE_ADDRESS (next_v
) = VALUE_ADDRESS (v
);
147 while (i
< length
&& things_printed
< print_max
)
149 fputs_filtered (", ", stream
);
150 wrap_here (n_spaces (2));
163 VALUE_OFFSET (v
) = 0;
166 VALUE_OFFSET (next_v
) = VALUE_OFFSET (v
);
168 for (reps
= 1; i
+ reps
< length
; reps
++)
170 VALUE_LAZY (next_v
) = 1;
171 VALUE_OFFSET (next_v
) += TYPE_LENGTH (el_type
);
172 if (memcmp (VALUE_CONTENTS (v
), VALUE_CONTENTS (next_v
),
173 TYPE_LENGTH (el_type
)) != 0)
178 fprintf_filtered (stream
, "%d: ", i
);
180 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
182 val_print (VALUE_TYPE (v
), VALUE_CONTENTS (v
), 0, 0,
183 stream
, format
, 2, 1, pretty
);
191 fprintf_filtered (stream
, "...");
193 fprintf_filtered (stream
, "}");
198 /* If it's type String, print it */
200 if (TYPE_CODE (type
) == TYPE_CODE_PTR
201 && TYPE_TARGET_TYPE (type
)
202 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
))
203 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
)),
204 "java.lang.String") == 0
205 && (format
== 0 || format
== 's')
207 && value_as_address (val
) != 0)
209 struct value
*data_val
;
211 struct value
*boffset_val
;
212 unsigned long boffset
;
213 struct value
*count_val
;
217 mark
= value_mark (); /* Remember start of new values */
219 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
220 data
= value_as_address (data_val
);
222 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
223 boffset
= value_as_address (boffset_val
);
225 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
226 count
= value_as_address (count_val
);
228 value_free_to_mark (mark
); /* Release unnecessary values */
230 val_print_string (data
+ boffset
, count
, 2, stream
);
235 return (val_print (type
, VALUE_CONTENTS (val
), 0, address
,
236 stream
, format
, 1, 0, pretty
));
239 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
240 same meanings as in cp_print_value and c_val_print.
242 DONT_PRINT is an array of baseclass types that we
243 should not print, or zero if called from top level. */
246 java_print_value_fields (struct type
*type
, char *valaddr
, CORE_ADDR address
,
247 struct ui_file
*stream
, int format
, int recurse
,
248 enum val_prettyprint pretty
)
250 int i
, len
, n_baseclasses
;
252 CHECK_TYPEDEF (type
);
254 fprintf_filtered (stream
, "{");
255 len
= TYPE_NFIELDS (type
);
256 n_baseclasses
= TYPE_N_BASECLASSES (type
);
258 if (n_baseclasses
> 0)
260 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
262 for (i
= 0; i
< n_baseclasses
; i
++)
265 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
266 char *basename
= TYPE_NAME (baseclass
);
269 if (BASETYPE_VIA_VIRTUAL (type
, i
))
272 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
279 fprintf_filtered (stream
, "\n");
280 print_spaces_filtered (2 * (recurse
+ 1), stream
);
282 fputs_filtered ("<", stream
);
283 /* Not sure what the best notation is in the case where there is no
285 fputs_filtered (basename
? basename
: "", stream
);
286 fputs_filtered ("> = ", stream
);
288 base_valaddr
= valaddr
;
290 java_print_value_fields (baseclass
, base_valaddr
, address
+ boffset
,
291 stream
, format
, recurse
+ 1, pretty
);
292 fputs_filtered (", ", stream
);
300 if (!len
&& n_baseclasses
== 1)
301 fprintf_filtered (stream
, "<No data fields>");
304 extern int inspect_it
;
307 for (i
= n_baseclasses
; i
< len
; i
++)
309 /* If requested, skip printing of static fields. */
310 if (TYPE_FIELD_STATIC (type
, i
))
312 char *name
= TYPE_FIELD_NAME (type
, i
);
313 if (!static_field_print
)
315 if (name
!= NULL
&& strcmp (name
, "class") == 0)
319 fprintf_filtered (stream
, ", ");
320 else if (n_baseclasses
> 0)
324 fprintf_filtered (stream
, "\n");
325 print_spaces_filtered (2 + 2 * recurse
, stream
);
326 fputs_filtered ("members of ", stream
);
327 fputs_filtered (type_name_no_tag (type
), stream
);
328 fputs_filtered (": ", stream
);
335 fprintf_filtered (stream
, "\n");
336 print_spaces_filtered (2 + 2 * recurse
, stream
);
340 wrap_here (n_spaces (2 + 2 * recurse
));
344 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
345 fputs_filtered ("\"( ptr \"", stream
);
347 fputs_filtered ("\"( nodef \"", stream
);
348 if (TYPE_FIELD_STATIC (type
, i
))
349 fputs_filtered ("static ", stream
);
350 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
352 DMGL_PARAMS
| DMGL_ANSI
);
353 fputs_filtered ("\" \"", stream
);
354 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
356 DMGL_PARAMS
| DMGL_ANSI
);
357 fputs_filtered ("\") \"", stream
);
361 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
363 if (TYPE_FIELD_STATIC (type
, i
))
364 fputs_filtered ("static ", stream
);
365 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
367 DMGL_PARAMS
| DMGL_ANSI
);
368 annotate_field_name_end ();
369 fputs_filtered (": ", stream
);
370 annotate_field_value ();
373 if (!TYPE_FIELD_STATIC (type
, i
) && TYPE_FIELD_PACKED (type
, i
))
377 /* Bitfields require special handling, especially due to byte
379 if (TYPE_FIELD_IGNORE (type
, i
))
381 fputs_filtered ("<optimized out or zero length>", stream
);
385 v
= value_from_longest (TYPE_FIELD_TYPE (type
, i
),
386 unpack_field_as_long (type
, valaddr
, i
));
388 val_print (TYPE_FIELD_TYPE (type
, i
), VALUE_CONTENTS (v
), 0,
389 0, stream
, format
, 0, recurse
+ 1, pretty
);
394 if (TYPE_FIELD_IGNORE (type
, i
))
396 fputs_filtered ("<optimized out or zero length>", stream
);
398 else if (TYPE_FIELD_STATIC (type
, i
))
400 struct value
*v
= value_static_field (type
, i
);
402 fputs_filtered ("<optimized out>", stream
);
405 struct type
*t
= check_typedef (VALUE_TYPE (v
));
406 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
408 val_print (VALUE_TYPE (v
),
409 VALUE_CONTENTS (v
), 0, VALUE_ADDRESS (v
),
410 stream
, format
, 0, recurse
+ 1, pretty
);
413 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
414 fputs_filtered ("<unknown type>", stream
);
417 val_print (TYPE_FIELD_TYPE (type
, i
),
418 valaddr
+ TYPE_FIELD_BITPOS (type
, i
) / 8, 0,
419 address
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
420 stream
, format
, 0, recurse
+ 1, pretty
);
423 annotate_field_end ();
428 fprintf_filtered (stream
, "\n");
429 print_spaces_filtered (2 * recurse
, stream
);
432 fprintf_filtered (stream
, "}");
435 /* Print data of type TYPE located at VALADDR (within GDB), which came from
436 the inferior at address ADDRESS, onto stdio stream STREAM according to
437 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
440 If the data are a string pointer, returns the number of string characters
443 If DEREF_REF is nonzero, then dereference references, otherwise just print
446 The PRETTY parameter controls prettyprinting. */
449 java_val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
450 CORE_ADDR address
, struct ui_file
*stream
, int format
,
451 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
453 register unsigned int i
= 0; /* Number of characters printed */
454 struct type
*target_type
;
457 CHECK_TYPEDEF (type
);
458 switch (TYPE_CODE (type
))
461 if (format
&& format
!= 's')
463 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
467 if (vtblprint
&& cp_is_vtbl_ptr_type (type
))
469 /* Print the unmangled name if desired. */
470 /* Print vtable entry - we only get here if we ARE using
471 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
472 print_address_demangle (extract_address (valaddr
, TYPE_LENGTH (type
)),
477 addr
= unpack_pointer (type
, valaddr
);
480 fputs_filtered ("null", stream
);
483 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
485 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
487 /* Try to print what function it points to. */
488 print_address_demangle (addr
, stream
, demangle
);
489 /* Return value is irrelevant except for string pointers. */
493 if (addressprint
&& format
!= 's')
495 fputs_filtered ("@", stream
);
496 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
503 /* Can't just call c_val_print because that prints bytes as C
505 format
= format
? format
: output_format
;
507 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
508 else if (TYPE_CODE (type
) == TYPE_CODE_CHAR
509 || (TYPE_CODE (type
) == TYPE_CODE_INT
510 && TYPE_LENGTH (type
) == 2
511 && strcmp (TYPE_NAME (type
), "char") == 0))
512 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
), stream
);
514 val_print_type_code_int (type
, valaddr
, stream
);
517 case TYPE_CODE_STRUCT
:
518 java_print_value_fields (type
, valaddr
, address
, stream
, format
,
523 return c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
524 format
, deref_ref
, recurse
, pretty
);
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