f0614fa4523fe8e1e4f312d00eef833a2944fa8b
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')
207 value_ptr boffset_val
;
208 unsigned long boffset
;
213 mark
= value_mark (); /* Remember start of new values */
215 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
216 data
= value_as_pointer (data_val
);
218 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
219 boffset
= value_as_pointer (boffset_val
);
221 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
222 count
= value_as_pointer (count_val
);
224 value_free_to_mark (mark
); /* Release unnecessary values */
226 val_print_string (data
+ boffset
, count
, 2, stream
);
231 return (val_print (type
, VALUE_CONTENTS (val
), 0, address
,
232 stream
, format
, 1, 0, pretty
));
235 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
236 same meanings as in cp_print_value and c_val_print.
238 DONT_PRINT is an array of baseclass types that we
239 should not print, or zero if called from top level. */
242 java_print_value_fields (struct type
*type
, char *valaddr
, CORE_ADDR address
,
243 struct ui_file
*stream
, int format
, int recurse
,
244 enum val_prettyprint pretty
)
246 int i
, len
, n_baseclasses
;
248 CHECK_TYPEDEF (type
);
250 fprintf_filtered (stream
, "{");
251 len
= TYPE_NFIELDS (type
);
252 n_baseclasses
= TYPE_N_BASECLASSES (type
);
254 if (n_baseclasses
> 0)
256 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
258 for (i
= 0; i
< n_baseclasses
; i
++)
261 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
262 char *basename
= TYPE_NAME (baseclass
);
265 if (BASETYPE_VIA_VIRTUAL (type
, i
))
268 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
275 fprintf_filtered (stream
, "\n");
276 print_spaces_filtered (2 * (recurse
+ 1), stream
);
278 fputs_filtered ("<", stream
);
279 /* Not sure what the best notation is in the case where there is no
281 fputs_filtered (basename
? basename
: "", stream
);
282 fputs_filtered ("> = ", stream
);
284 base_valaddr
= valaddr
;
286 java_print_value_fields (baseclass
, base_valaddr
, address
+ boffset
,
287 stream
, format
, recurse
+ 1, pretty
);
288 fputs_filtered (", ", stream
);
296 if (!len
&& n_baseclasses
== 1)
297 fprintf_filtered (stream
, "<No data fields>");
300 extern int inspect_it
;
303 for (i
= n_baseclasses
; i
< len
; i
++)
305 /* If requested, skip printing of static fields. */
306 if (TYPE_FIELD_STATIC (type
, i
))
308 char *name
= TYPE_FIELD_NAME (type
, i
);
309 if (!static_field_print
)
311 if (name
!= NULL
&& strcmp (name
, "class") == 0)
315 fprintf_filtered (stream
, ", ");
316 else if (n_baseclasses
> 0)
320 fprintf_filtered (stream
, "\n");
321 print_spaces_filtered (2 + 2 * recurse
, stream
);
322 fputs_filtered ("members of ", stream
);
323 fputs_filtered (type_name_no_tag (type
), stream
);
324 fputs_filtered (": ", stream
);
331 fprintf_filtered (stream
, "\n");
332 print_spaces_filtered (2 + 2 * recurse
, stream
);
336 wrap_here (n_spaces (2 + 2 * recurse
));
340 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
341 fputs_filtered ("\"( ptr \"", stream
);
343 fputs_filtered ("\"( nodef \"", stream
);
344 if (TYPE_FIELD_STATIC (type
, i
))
345 fputs_filtered ("static ", stream
);
346 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
348 DMGL_PARAMS
| DMGL_ANSI
);
349 fputs_filtered ("\" \"", stream
);
350 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
352 DMGL_PARAMS
| DMGL_ANSI
);
353 fputs_filtered ("\") \"", stream
);
357 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
359 if (TYPE_FIELD_STATIC (type
, i
))
360 fputs_filtered ("static ", stream
);
361 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
363 DMGL_PARAMS
| DMGL_ANSI
);
364 annotate_field_name_end ();
365 fputs_filtered (": ", stream
);
366 annotate_field_value ();
369 if (!TYPE_FIELD_STATIC (type
, i
) && TYPE_FIELD_PACKED (type
, i
))
373 /* Bitfields require special handling, especially due to byte
375 if (TYPE_FIELD_IGNORE (type
, i
))
377 fputs_filtered ("<optimized out or zero length>", stream
);
381 v
= value_from_longest (TYPE_FIELD_TYPE (type
, i
),
382 unpack_field_as_long (type
, valaddr
, i
));
384 val_print (TYPE_FIELD_TYPE (type
, i
), VALUE_CONTENTS (v
), 0,
385 0, stream
, format
, 0, recurse
+ 1, pretty
);
390 if (TYPE_FIELD_IGNORE (type
, i
))
392 fputs_filtered ("<optimized out or zero length>", stream
);
394 else if (TYPE_FIELD_STATIC (type
, i
))
396 value_ptr v
= value_static_field (type
, i
);
398 fputs_filtered ("<optimized out>", stream
);
401 struct type
*t
= check_typedef (VALUE_TYPE (v
));
402 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
404 val_print (VALUE_TYPE (v
),
405 VALUE_CONTENTS (v
), 0, VALUE_ADDRESS (v
),
406 stream
, format
, 0, recurse
+ 1, pretty
);
409 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
410 fputs_filtered ("<unknown type>", stream
);
413 val_print (TYPE_FIELD_TYPE (type
, i
),
414 valaddr
+ TYPE_FIELD_BITPOS (type
, i
) / 8, 0,
415 address
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
416 stream
, format
, 0, recurse
+ 1, pretty
);
419 annotate_field_end ();
424 fprintf_filtered (stream
, "\n");
425 print_spaces_filtered (2 * recurse
, stream
);
428 fprintf_filtered (stream
, "}");
431 /* Print data of type TYPE located at VALADDR (within GDB), which came from
432 the inferior at address ADDRESS, onto stdio stream STREAM according to
433 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
436 If the data are a string pointer, returns the number of string characters
439 If DEREF_REF is nonzero, then dereference references, otherwise just print
442 The PRETTY parameter controls prettyprinting. */
445 java_val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
446 CORE_ADDR address
, struct ui_file
*stream
, int format
,
447 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
449 register unsigned int i
= 0; /* Number of characters printed */
450 struct type
*target_type
;
453 CHECK_TYPEDEF (type
);
454 switch (TYPE_CODE (type
))
457 if (format
&& format
!= 's')
459 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
463 if (vtblprint
&& cp_is_vtbl_ptr_type (type
))
465 /* Print the unmangled name if desired. */
466 /* Print vtable entry - we only get here if we ARE using
467 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
468 print_address_demangle (extract_address (valaddr
, TYPE_LENGTH (type
)),
473 addr
= unpack_pointer (type
, valaddr
);
476 fputs_filtered ("null", stream
);
479 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
481 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
483 /* Try to print what function it points to. */
484 print_address_demangle (addr
, stream
, demangle
);
485 /* Return value is irrelevant except for string pointers. */
489 if (addressprint
&& format
!= 's')
491 fputs_filtered ("@", stream
);
492 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
498 format
= format
? format
: output_format
;
500 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
502 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
), stream
);
506 /* Can't just call c_val_print because that print bytes as C chars. */
507 format
= format
? format
: output_format
;
509 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
511 val_print_type_code_int (type
, valaddr
, stream
);
514 case TYPE_CODE_STRUCT
:
515 java_print_value_fields (type
, valaddr
, address
, stream
, format
,
520 return c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
521 format
, deref_ref
, recurse
, pretty
);
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