1 /* Support for printing Java values for GDB, the GNU debugger.
3 Copyright (C) 1997-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
35 java_value_print (struct value
*val
, struct ui_file
*stream
,
36 const struct value_print_options
*options
)
38 struct gdbarch
*gdbarch
= get_type_arch (value_type (val
));
39 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
44 struct value_print_options opts
;
46 type
= value_type (val
);
47 address
= value_address (val
);
49 if (is_object_type (type
))
52 struct value
*tem
= val
;
54 /* Get the run-time type, and cast the object into that. */
55 while (TYPE_CODE (value_type (tem
)) == TYPE_CODE_PTR
)
56 tem
= value_ind (tem
);
58 obj_addr
= value_address (tem
);
62 type
= type_from_class (gdbarch
, java_class_from_object (val
));
63 type
= lookup_pointer_type (type
);
65 val
= value_at (type
, address
);
66 type
= value_type (val
);
70 if (TYPE_CODE (type
) == TYPE_CODE_PTR
&& !value_logical_not (val
))
71 type_print (TYPE_TARGET_TYPE (type
), "", stream
, -1);
73 name
= TYPE_TAG_NAME (type
);
74 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
&& name
!= NULL
75 && (i
= strlen (name
), name
[i
- 1] == ']'))
79 unsigned int things_printed
= 0;
82 = java_primitive_type_from_name (gdbarch
, name
, i
- 2);
85 read_memory (address
+ get_java_object_header_size (gdbarch
), buf4
, 4);
87 length
= (long) extract_signed_integer (buf4
, 4, byte_order
);
88 fprintf_filtered (stream
, "{length: %ld", length
);
93 CORE_ADDR next_element
= -1; /* Dummy initial value. */
95 /* Skip object header and length. */
96 address
+= get_java_object_header_size (gdbarch
) + 4;
98 while (i
< length
&& things_printed
< options
->print_max
)
103 alloca (gdbarch_ptr_bit (gdbarch
) / 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
+= gdbarch_ptr_bit (gdbarch
) / HOST_CHAR_BIT
;
113 /* FIXME: cagney/2003-05-24: Bogus or what. It
114 pulls a host sized pointer out of the target and
115 then extracts that as an address (while assuming
116 that the address is unsigned)! */
117 element
= extract_unsigned_integer (buf
, sizeof (buf
),
121 for (reps
= 1; i
+ reps
< length
; reps
++)
123 read_memory (address
, buf
, sizeof (buf
));
124 address
+= gdbarch_ptr_bit (gdbarch
) / HOST_CHAR_BIT
;
125 /* FIXME: cagney/2003-05-24: Bogus or what. It
126 pulls a host sized pointer out of the target and
127 then extracts that as an address (while assuming
128 that the address is unsigned)! */
129 next_element
= extract_unsigned_integer (buf
, sizeof (buf
),
131 if (next_element
!= element
)
136 fprintf_filtered (stream
, "%d: ", i
);
138 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
141 fprintf_filtered (stream
, "null");
143 fprintf_filtered (stream
, "@%s", paddress (gdbarch
, element
));
151 struct value
*v
= allocate_value (el_type
);
152 struct value
*next_v
= allocate_value (el_type
);
154 set_value_address (v
, (address
155 + get_java_object_header_size (gdbarch
) + 4));
156 set_value_address (next_v
, value_raw_address (v
));
158 while (i
< length
&& things_printed
< options
->print_max
)
160 fputs_filtered (", ", stream
);
161 wrap_here (n_spaces (2));
173 set_value_lazy (v
, 1);
174 set_value_offset (v
, 0);
177 set_value_offset (next_v
, value_offset (v
));
179 for (reps
= 1; i
+ reps
< length
; reps
++)
181 set_value_lazy (next_v
, 1);
182 set_value_offset (next_v
, value_offset (next_v
)
183 + TYPE_LENGTH (el_type
));
184 value_fetch_lazy (next_v
);
185 if (!value_contents_eq (v
, value_embedded_offset (v
),
187 value_embedded_offset (next_v
),
188 TYPE_LENGTH (el_type
)))
193 fprintf_filtered (stream
, "%d: ", i
);
195 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
199 common_val_print (v
, stream
, 1, &opts
, current_language
);
207 fprintf_filtered (stream
, "...");
209 fprintf_filtered (stream
, "}");
214 /* If it's type String, print it. */
216 if (TYPE_CODE (type
) == TYPE_CODE_PTR
217 && TYPE_TARGET_TYPE (type
)
218 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
))
219 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
)),
220 "java.lang.String") == 0
221 && (options
->format
== 0 || options
->format
== 's')
223 && value_as_address (val
) != 0)
225 struct type
*char_type
;
226 struct value
*data_val
;
228 struct value
*boffset_val
;
229 unsigned long boffset
;
230 struct value
*count_val
;
234 fputs_filtered (" ", stream
);
236 mark
= value_mark (); /* Remember start of new values. */
238 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
239 data
= value_as_address (data_val
);
241 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
242 boffset
= value_as_address (boffset_val
);
244 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
245 count
= value_as_address (count_val
);
247 value_free_to_mark (mark
); /* Release unnecessary values. */
249 char_type
= builtin_java_type (gdbarch
)->builtin_char
;
250 val_print_string (char_type
, NULL
, data
+ boffset
, count
, stream
,
258 common_val_print (val
, stream
, 0, &opts
, current_language
);
261 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the
262 same meanings as in cp_print_value and c_val_print.
264 DONT_PRINT is an array of baseclass types that we
265 should not print, or zero if called from top level. */
268 java_print_value_fields (struct type
*type
, const gdb_byte
*valaddr
,
270 CORE_ADDR address
, struct ui_file
*stream
,
272 const struct value
*val
,
273 const struct value_print_options
*options
)
275 int i
, len
, n_baseclasses
;
277 type
= check_typedef (type
);
279 fprintf_filtered (stream
, "{");
280 len
= TYPE_NFIELDS (type
);
281 n_baseclasses
= TYPE_N_BASECLASSES (type
);
283 if (n_baseclasses
> 0)
285 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
287 for (i
= 0; i
< n_baseclasses
; i
++)
290 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
291 const char *basename
= TYPE_NAME (baseclass
);
292 const gdb_byte
*base_valaddr
;
294 if (BASETYPE_VIA_VIRTUAL (type
, i
))
297 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
302 if (options
->prettyformat
)
304 fprintf_filtered (stream
, "\n");
305 print_spaces_filtered (2 * (recurse
+ 1), stream
);
307 fputs_filtered ("<", stream
);
308 /* Not sure what the best notation is in the case where there is no
310 fputs_filtered (basename
? basename
: "", stream
);
311 fputs_filtered ("> = ", stream
);
313 base_valaddr
= valaddr
;
315 java_print_value_fields (baseclass
, base_valaddr
,
316 offset
+ boffset
, address
,
317 stream
, recurse
+ 1, val
, options
);
318 fputs_filtered (", ", stream
);
322 if (!len
&& n_baseclasses
== 1)
323 fprintf_filtered (stream
, "<No data fields>");
328 for (i
= n_baseclasses
; i
< len
; i
++)
330 /* If requested, skip printing of static fields. */
331 if (field_is_static (&TYPE_FIELD (type
, i
)))
333 const char *name
= TYPE_FIELD_NAME (type
, i
);
335 if (!options
->static_field_print
)
337 if (name
!= NULL
&& strcmp (name
, "class") == 0)
341 fprintf_filtered (stream
, ", ");
342 else if (n_baseclasses
> 0)
344 if (options
->prettyformat
)
346 fprintf_filtered (stream
, "\n");
347 print_spaces_filtered (2 + 2 * recurse
, stream
);
348 fputs_filtered ("members of ", stream
);
349 fputs_filtered (type_name_no_tag (type
), stream
);
350 fputs_filtered (": ", stream
);
355 if (options
->prettyformat
)
357 fprintf_filtered (stream
, "\n");
358 print_spaces_filtered (2 + 2 * recurse
, stream
);
362 wrap_here (n_spaces (2 + 2 * recurse
));
365 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
367 if (field_is_static (&TYPE_FIELD (type
, i
)))
368 fputs_filtered ("static ", stream
);
369 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
371 DMGL_PARAMS
| DMGL_ANSI
);
372 annotate_field_name_end ();
373 fputs_filtered (": ", stream
);
374 annotate_field_value ();
376 if (!field_is_static (&TYPE_FIELD (type
, i
))
377 && TYPE_FIELD_PACKED (type
, i
))
381 /* Bitfields require special handling, especially due to byte
383 if (TYPE_FIELD_IGNORE (type
, i
))
385 fputs_filtered ("<optimized out or zero length>", stream
);
387 else if (value_bits_synthetic_pointer (val
,
388 TYPE_FIELD_BITPOS (type
,
390 TYPE_FIELD_BITSIZE (type
,
393 fputs_filtered (_("<synthetic pointer>"), stream
);
397 struct value_print_options opts
;
399 v
= value_field_bitfield (type
, i
, valaddr
, offset
, val
);
403 common_val_print (v
, stream
, recurse
+ 1,
404 &opts
, current_language
);
409 if (TYPE_FIELD_IGNORE (type
, i
))
411 fputs_filtered ("<optimized out or zero length>", stream
);
413 else if (field_is_static (&TYPE_FIELD (type
, i
)))
415 struct value_print_options opts
;
416 struct value
*v
= value_static_field (type
, i
);
417 struct type
*t
= check_typedef (value_type (v
));
419 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
423 common_val_print (v
, stream
, recurse
+ 1,
424 &opts
, current_language
);
426 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
427 fputs_filtered ("<unknown type>", stream
);
430 struct value_print_options opts
= *options
;
433 val_print (TYPE_FIELD_TYPE (type
, i
),
435 offset
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
436 address
, stream
, recurse
+ 1, val
, &opts
,
440 annotate_field_end ();
443 if (options
->prettyformat
)
445 fprintf_filtered (stream
, "\n");
446 print_spaces_filtered (2 * recurse
, stream
);
449 fprintf_filtered (stream
, "}");
452 /* See val_print for a description of the various parameters of this
453 function; they are identical. */
456 java_val_print (struct type
*type
, const gdb_byte
*valaddr
,
457 int embedded_offset
, CORE_ADDR address
,
458 struct ui_file
*stream
, int recurse
,
459 const struct value
*val
,
460 const struct value_print_options
*options
)
462 struct gdbarch
*gdbarch
= get_type_arch (type
);
463 struct type
*target_type
;
466 type
= check_typedef (type
);
467 switch (TYPE_CODE (type
))
470 if (options
->format
&& options
->format
!= 's')
472 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
473 val
, options
, 0, stream
);
476 addr
= unpack_pointer (type
, valaddr
+ embedded_offset
);
479 fputs_filtered ("null", stream
);
482 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
484 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
486 /* Try to print what function it points to. */
487 print_address_demangle (options
, gdbarch
, addr
, stream
, demangle
);
491 if (options
->addressprint
&& options
->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 if (options
->format
|| options
->output_format
)
505 struct value_print_options opts
= *options
;
507 opts
.format
= (options
->format
? options
->format
508 : options
->output_format
);
509 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
510 val
, &opts
, 0, stream
);
512 else if (TYPE_CODE (type
) == TYPE_CODE_CHAR
513 || (TYPE_CODE (type
) == TYPE_CODE_INT
514 && TYPE_LENGTH (type
) == 2
515 && strcmp (TYPE_NAME (type
), "char") == 0))
516 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
+ embedded_offset
),
519 val_print_type_code_int (type
, valaddr
+ embedded_offset
, stream
);
522 case TYPE_CODE_STRUCT
:
523 java_print_value_fields (type
, valaddr
, embedded_offset
,
524 address
, stream
, recurse
, val
, options
);
528 c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
529 recurse
, val
, options
);
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