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
)
99 char buf
[TARGET_PTR_BIT
/ HOST_CHAR_BIT
];
101 fputs_filtered (", ", stream
);
102 wrap_here (n_spaces (2));
105 element
= next_element
;
108 read_memory (address
, buf
, sizeof (buf
));
109 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
110 element
= extract_address (buf
, sizeof (buf
));
113 for (reps
= 1; i
+ reps
< length
; reps
++)
115 read_memory (address
, buf
, sizeof (buf
));
116 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
117 next_element
= extract_address (buf
, sizeof (buf
));
118 if (next_element
!= element
)
123 fprintf_filtered (stream
, "%d: ", i
);
125 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
128 fprintf_filtered (stream
, "null");
130 fprintf_filtered (stream
, "@%s", paddr_nz (element
));
138 value_ptr v
= allocate_value (el_type
);
139 value_ptr next_v
= allocate_value (el_type
);
141 VALUE_ADDRESS (v
) = address
+ JAVA_OBJECT_SIZE
+ 4;
142 VALUE_ADDRESS (next_v
) = VALUE_ADDRESS (v
);
144 while (i
< length
&& things_printed
< print_max
)
146 fputs_filtered (", ", stream
);
147 wrap_here (n_spaces (2));
160 VALUE_OFFSET (v
) = 0;
163 VALUE_OFFSET (next_v
) = VALUE_OFFSET (v
);
165 for (reps
= 1; i
+ reps
< length
; reps
++)
167 VALUE_LAZY (next_v
) = 1;
168 VALUE_OFFSET (next_v
) += TYPE_LENGTH (el_type
);
169 if (memcmp (VALUE_CONTENTS (v
), VALUE_CONTENTS (next_v
),
170 TYPE_LENGTH (el_type
)) != 0)
175 fprintf_filtered (stream
, "%d: ", i
);
177 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
179 val_print (VALUE_TYPE (v
), VALUE_CONTENTS (v
), 0, 0,
180 stream
, format
, 2, 1, pretty
);
188 fprintf_filtered (stream
, "...");
190 fprintf_filtered (stream
, "}");
195 /* If it's type String, print it */
197 if (TYPE_CODE (type
) == TYPE_CODE_PTR
198 && TYPE_TARGET_TYPE (type
)
199 && TYPE_NAME (TYPE_TARGET_TYPE (type
))
200 && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type
)), "java.lang.String") == 0
201 && (format
== 0 || format
== 's')
206 value_ptr boffset_val
;
207 unsigned long boffset
;
212 mark
= value_mark (); /* Remember start of new values */
214 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
215 data
= value_as_pointer (data_val
);
217 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
218 boffset
= value_as_pointer (boffset_val
);
220 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
221 count
= value_as_pointer (count_val
);
223 value_free_to_mark (mark
); /* Release unnecessary values */
225 val_print_string (data
+ boffset
, count
, 2, stream
);
230 return (val_print (type
, VALUE_CONTENTS (val
), 0, address
,
231 stream
, format
, 1, 0, pretty
));
234 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
235 same meanings as in cp_print_value and c_val_print.
237 DONT_PRINT is an array of baseclass types that we
238 should not print, or zero if called from top level. */
241 java_print_value_fields (struct type
*type
, char *valaddr
, CORE_ADDR address
,
242 struct ui_file
*stream
, int format
, int recurse
,
243 enum val_prettyprint pretty
)
245 int i
, len
, n_baseclasses
;
247 CHECK_TYPEDEF (type
);
249 fprintf_filtered (stream
, "{");
250 len
= TYPE_NFIELDS (type
);
251 n_baseclasses
= TYPE_N_BASECLASSES (type
);
253 if (n_baseclasses
> 0)
255 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
257 for (i
= 0; i
< n_baseclasses
; i
++)
260 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
261 char *basename
= TYPE_NAME (baseclass
);
264 if (BASETYPE_VIA_VIRTUAL (type
, i
))
267 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
274 fprintf_filtered (stream
, "\n");
275 print_spaces_filtered (2 * (recurse
+ 1), stream
);
277 fputs_filtered ("<", stream
);
278 /* Not sure what the best notation is in the case where there is no
280 fputs_filtered (basename
? basename
: "", stream
);
281 fputs_filtered ("> = ", stream
);
283 base_valaddr
= valaddr
;
285 java_print_value_fields (baseclass
, base_valaddr
, address
+ boffset
,
286 stream
, format
, recurse
+ 1, pretty
);
287 fputs_filtered (", ", stream
);
295 if (!len
&& n_baseclasses
== 1)
296 fprintf_filtered (stream
, "<No data fields>");
299 extern int inspect_it
;
302 for (i
= n_baseclasses
; i
< len
; i
++)
304 /* If requested, skip printing of static fields. */
305 if (TYPE_FIELD_STATIC (type
, i
))
307 char *name
= TYPE_FIELD_NAME (type
, i
);
308 if (!static_field_print
)
310 if (name
!= NULL
&& strcmp (name
, "class") == 0)
314 fprintf_filtered (stream
, ", ");
315 else if (n_baseclasses
> 0)
319 fprintf_filtered (stream
, "\n");
320 print_spaces_filtered (2 + 2 * recurse
, stream
);
321 fputs_filtered ("members of ", stream
);
322 fputs_filtered (type_name_no_tag (type
), stream
);
323 fputs_filtered (": ", stream
);
330 fprintf_filtered (stream
, "\n");
331 print_spaces_filtered (2 + 2 * recurse
, stream
);
335 wrap_here (n_spaces (2 + 2 * recurse
));
339 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
340 fputs_filtered ("\"( ptr \"", stream
);
342 fputs_filtered ("\"( nodef \"", stream
);
343 if (TYPE_FIELD_STATIC (type
, i
))
344 fputs_filtered ("static ", stream
);
345 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
347 DMGL_PARAMS
| DMGL_ANSI
);
348 fputs_filtered ("\" \"", stream
);
349 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
351 DMGL_PARAMS
| DMGL_ANSI
);
352 fputs_filtered ("\") \"", stream
);
356 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
358 if (TYPE_FIELD_STATIC (type
, i
))
359 fputs_filtered ("static ", stream
);
360 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
362 DMGL_PARAMS
| DMGL_ANSI
);
363 annotate_field_name_end ();
364 fputs_filtered (": ", stream
);
365 annotate_field_value ();
368 if (!TYPE_FIELD_STATIC (type
, i
) && TYPE_FIELD_PACKED (type
, i
))
372 /* Bitfields require special handling, especially due to byte
374 if (TYPE_FIELD_IGNORE (type
, i
))
376 fputs_filtered ("<optimized out or zero length>", stream
);
380 v
= value_from_longest (TYPE_FIELD_TYPE (type
, i
),
381 unpack_field_as_long (type
, valaddr
, i
));
383 val_print (TYPE_FIELD_TYPE (type
, i
), VALUE_CONTENTS (v
), 0,
384 0, stream
, format
, 0, recurse
+ 1, pretty
);
389 if (TYPE_FIELD_IGNORE (type
, i
))
391 fputs_filtered ("<optimized out or zero length>", stream
);
393 else if (TYPE_FIELD_STATIC (type
, i
))
395 value_ptr v
= value_static_field (type
, i
);
397 fputs_filtered ("<optimized out>", stream
);
400 struct type
*t
= check_typedef (VALUE_TYPE (v
));
401 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
403 val_print (VALUE_TYPE (v
),
404 VALUE_CONTENTS (v
), 0, VALUE_ADDRESS (v
),
405 stream
, format
, 0, recurse
+ 1, pretty
);
408 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
409 fputs_filtered ("<unknown type>", stream
);
412 val_print (TYPE_FIELD_TYPE (type
, i
),
413 valaddr
+ TYPE_FIELD_BITPOS (type
, i
) / 8, 0,
414 address
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
415 stream
, format
, 0, recurse
+ 1, pretty
);
418 annotate_field_end ();
423 fprintf_filtered (stream
, "\n");
424 print_spaces_filtered (2 * recurse
, stream
);
427 fprintf_filtered (stream
, "}");
430 /* Print data of type TYPE located at VALADDR (within GDB), which came from
431 the inferior at address ADDRESS, onto stdio stream STREAM according to
432 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
435 If the data are a string pointer, returns the number of string characters
438 If DEREF_REF is nonzero, then dereference references, otherwise just print
441 The PRETTY parameter controls prettyprinting. */
444 java_val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
445 CORE_ADDR address
, struct ui_file
*stream
, int format
,
446 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
448 register unsigned int i
= 0; /* Number of characters printed */
449 struct type
*target_type
;
452 CHECK_TYPEDEF (type
);
453 switch (TYPE_CODE (type
))
456 if (format
&& format
!= 's')
458 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
462 if (vtblprint
&& cp_is_vtbl_ptr_type (type
))
464 /* Print the unmangled name if desired. */
465 /* Print vtable entry - we only get here if we ARE using
466 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
467 print_address_demangle (extract_address (valaddr
, TYPE_LENGTH (type
)),
472 addr
= unpack_pointer (type
, valaddr
);
475 fputs_filtered ("null", stream
);
478 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
480 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
482 /* Try to print what function it points to. */
483 print_address_demangle (addr
, stream
, demangle
);
484 /* Return value is irrelevant except for string pointers. */
488 if (addressprint
&& format
!= 's')
490 fputs_filtered ("@", stream
);
491 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
497 format
= format
? format
: output_format
;
499 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
501 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
), stream
);
505 /* Can't just call c_val_print because that print bytes as C chars. */
506 format
= format
? format
: output_format
;
508 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
510 val_print_type_code_int (type
, valaddr
, stream
);
513 case TYPE_CODE_STRUCT
:
514 java_print_value_fields (type
, valaddr
, address
, stream
, format
,
519 return c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
520 format
, deref_ref
, recurse
, pretty
);
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