1 /* Support for printing Java values for GDB, the GNU debugger.
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007,
4 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "expression.h"
33 #include "gdb_string.h"
38 java_value_print (struct value
*val
, struct ui_file
*stream
,
39 const struct value_print_options
*options
)
41 struct gdbarch
*gdbarch
= get_type_arch (value_type (val
));
42 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
47 struct value_print_options opts
;
49 type
= value_type (val
);
50 address
= value_address (val
);
52 if (is_object_type (type
))
56 /* Get the run-time type, and cast the object into that. */
58 obj_addr
= unpack_pointer (type
, value_contents (val
));
62 type
= type_from_class (gdbarch
, java_class_from_object (val
));
63 type
= lookup_pointer_type (type
);
65 val
= value_at (type
, address
);
69 if (TYPE_CODE (type
) == TYPE_CODE_PTR
&& !value_logical_not (val
))
70 type_print (TYPE_TARGET_TYPE (type
), "", stream
, -1);
72 name
= TYPE_TAG_NAME (type
);
73 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
&& name
!= NULL
74 && (i
= strlen (name
), name
[i
- 1] == ']'))
78 unsigned int things_printed
= 0;
81 = java_primitive_type_from_name (gdbarch
, name
, i
- 2);
84 read_memory (address
+ get_java_object_header_size (gdbarch
), buf4
, 4);
86 length
= (long) extract_signed_integer (buf4
, 4, byte_order
);
87 fprintf_filtered (stream
, "{length: %ld", length
);
92 CORE_ADDR next_element
= -1; /* Dummy initial value. */
94 /* Skip object header and length. */
95 address
+= get_java_object_header_size (gdbarch
) + 4;
97 while (i
< length
&& things_printed
< options
->print_max
)
101 buf
= alloca (gdbarch_ptr_bit (gdbarch
) / 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
+= gdbarch_ptr_bit (gdbarch
) / HOST_CHAR_BIT
;
111 /* FIXME: cagney/2003-05-24: Bogus or what. It
112 pulls a host sized pointer out of the target and
113 then extracts that as an address (while assuming
114 that the address is unsigned)! */
115 element
= extract_unsigned_integer (buf
, sizeof (buf
),
119 for (reps
= 1; i
+ reps
< length
; reps
++)
121 read_memory (address
, buf
, sizeof (buf
));
122 address
+= gdbarch_ptr_bit (gdbarch
) / HOST_CHAR_BIT
;
123 /* FIXME: cagney/2003-05-24: Bogus or what. It
124 pulls a host sized pointer out of the target and
125 then extracts that as an address (while assuming
126 that the address is unsigned)! */
127 next_element
= extract_unsigned_integer (buf
, sizeof (buf
),
129 if (next_element
!= element
)
134 fprintf_filtered (stream
, "%d: ", i
);
136 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
139 fprintf_filtered (stream
, "null");
141 fprintf_filtered (stream
, "@%s", paddress (gdbarch
, element
));
149 struct value
*v
= allocate_value (el_type
);
150 struct value
*next_v
= allocate_value (el_type
);
152 set_value_address (v
, (address
153 + get_java_object_header_size (gdbarch
) + 4));
154 set_value_address (next_v
, value_raw_address (v
));
156 while (i
< length
&& things_printed
< options
->print_max
)
158 fputs_filtered (", ", stream
);
159 wrap_here (n_spaces (2));
171 set_value_lazy (v
, 1);
172 set_value_offset (v
, 0);
175 set_value_offset (next_v
, value_offset (v
));
177 for (reps
= 1; i
+ reps
< length
; reps
++)
179 set_value_lazy (next_v
, 1);
180 set_value_offset (next_v
, value_offset (next_v
)
181 + TYPE_LENGTH (el_type
));
182 if (memcmp (value_contents (v
), value_contents (next_v
),
183 TYPE_LENGTH (el_type
)) != 0)
188 fprintf_filtered (stream
, "%d: ", i
);
190 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
194 common_val_print (v
, stream
, 1, &opts
, current_language
);
202 fprintf_filtered (stream
, "...");
204 fprintf_filtered (stream
, "}");
209 /* If it's type String, print it. */
211 if (TYPE_CODE (type
) == TYPE_CODE_PTR
212 && TYPE_TARGET_TYPE (type
)
213 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
))
214 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
)),
215 "java.lang.String") == 0
216 && (options
->format
== 0 || options
->format
== 's')
218 && value_as_address (val
) != 0)
220 struct type
*char_type
;
221 struct value
*data_val
;
223 struct value
*boffset_val
;
224 unsigned long boffset
;
225 struct value
*count_val
;
229 mark
= value_mark (); /* Remember start of new values. */
231 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
232 data
= value_as_address (data_val
);
234 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
235 boffset
= value_as_address (boffset_val
);
237 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
238 count
= value_as_address (count_val
);
240 value_free_to_mark (mark
); /* Release unnecessary values. */
242 char_type
= builtin_java_type (gdbarch
)->builtin_char
;
243 val_print_string (char_type
, NULL
, data
+ boffset
, count
, stream
,
251 return common_val_print (val
, stream
, 0, &opts
, current_language
);
254 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the
255 same meanings as in cp_print_value and c_val_print.
257 DONT_PRINT is an array of baseclass types that we
258 should not print, or zero if called from top level. */
261 java_print_value_fields (struct type
*type
, const gdb_byte
*valaddr
,
263 CORE_ADDR address
, struct ui_file
*stream
,
265 const struct value
*val
,
266 const struct value_print_options
*options
)
268 int i
, len
, n_baseclasses
;
270 CHECK_TYPEDEF (type
);
272 fprintf_filtered (stream
, "{");
273 len
= TYPE_NFIELDS (type
);
274 n_baseclasses
= TYPE_N_BASECLASSES (type
);
276 if (n_baseclasses
> 0)
278 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
280 for (i
= 0; i
< n_baseclasses
; i
++)
283 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
284 char *basename
= TYPE_NAME (baseclass
);
285 const gdb_byte
*base_valaddr
;
287 if (BASETYPE_VIA_VIRTUAL (type
, i
))
290 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
297 fprintf_filtered (stream
, "\n");
298 print_spaces_filtered (2 * (recurse
+ 1), stream
);
300 fputs_filtered ("<", stream
);
301 /* Not sure what the best notation is in the case where there is no
303 fputs_filtered (basename
? basename
: "", stream
);
304 fputs_filtered ("> = ", stream
);
306 base_valaddr
= valaddr
;
308 java_print_value_fields (baseclass
, base_valaddr
,
309 offset
+ boffset
, address
,
310 stream
, recurse
+ 1, val
, options
);
311 fputs_filtered (", ", stream
);
315 if (!len
&& n_baseclasses
== 1)
316 fprintf_filtered (stream
, "<No data fields>");
321 for (i
= n_baseclasses
; i
< len
; i
++)
323 /* If requested, skip printing of static fields. */
324 if (field_is_static (&TYPE_FIELD (type
, i
)))
326 char *name
= TYPE_FIELD_NAME (type
, i
);
328 if (!options
->static_field_print
)
330 if (name
!= NULL
&& strcmp (name
, "class") == 0)
334 fprintf_filtered (stream
, ", ");
335 else if (n_baseclasses
> 0)
339 fprintf_filtered (stream
, "\n");
340 print_spaces_filtered (2 + 2 * recurse
, stream
);
341 fputs_filtered ("members of ", stream
);
342 fputs_filtered (type_name_no_tag (type
), stream
);
343 fputs_filtered (": ", stream
);
350 fprintf_filtered (stream
, "\n");
351 print_spaces_filtered (2 + 2 * recurse
, stream
);
355 wrap_here (n_spaces (2 + 2 * recurse
));
357 if (options
->inspect_it
)
359 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
360 fputs_filtered ("\"( ptr \"", stream
);
362 fputs_filtered ("\"( nodef \"", stream
);
363 if (field_is_static (&TYPE_FIELD (type
, i
)))
364 fputs_filtered ("static ", stream
);
365 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
367 DMGL_PARAMS
| DMGL_ANSI
);
368 fputs_filtered ("\" \"", stream
);
369 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
371 DMGL_PARAMS
| DMGL_ANSI
);
372 fputs_filtered ("\") \"", stream
);
376 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
378 if (field_is_static (&TYPE_FIELD (type
, i
)))
379 fputs_filtered ("static ", stream
);
380 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
382 DMGL_PARAMS
| DMGL_ANSI
);
383 annotate_field_name_end ();
384 fputs_filtered (": ", stream
);
385 annotate_field_value ();
388 if (!field_is_static (&TYPE_FIELD (type
, i
))
389 && TYPE_FIELD_PACKED (type
, i
))
393 /* Bitfields require special handling, especially due to byte
395 if (TYPE_FIELD_IGNORE (type
, i
))
397 fputs_filtered ("<optimized out or zero length>", stream
);
399 else if (value_bits_synthetic_pointer (val
,
400 TYPE_FIELD_BITPOS (type
,
402 TYPE_FIELD_BITSIZE (type
,
405 fputs_filtered (_("<synthetic pointer>"), stream
);
407 else if (!value_bits_valid (val
, TYPE_FIELD_BITPOS (type
, i
),
408 TYPE_FIELD_BITSIZE (type
, i
)))
410 val_print_optimized_out (stream
);
414 struct value_print_options opts
;
416 v
= value_from_longest
417 (TYPE_FIELD_TYPE (type
, i
),
418 unpack_field_as_long (type
, valaddr
+ offset
, i
));
422 common_val_print (v
, stream
, recurse
+ 1,
423 &opts
, current_language
);
428 if (TYPE_FIELD_IGNORE (type
, i
))
430 fputs_filtered ("<optimized out or zero length>", stream
);
432 else if (field_is_static (&TYPE_FIELD (type
, i
)))
434 struct value
*v
= value_static_field (type
, i
);
437 val_print_optimized_out (stream
);
440 struct value_print_options opts
;
441 struct type
*t
= check_typedef (value_type (v
));
443 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
447 common_val_print (v
, stream
, recurse
+ 1,
448 &opts
, current_language
);
451 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
452 fputs_filtered ("<unknown type>", stream
);
455 struct value_print_options opts
= *options
;
458 val_print (TYPE_FIELD_TYPE (type
, i
),
460 offset
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
461 address
, stream
, recurse
+ 1, val
, &opts
,
465 annotate_field_end ();
470 fprintf_filtered (stream
, "\n");
471 print_spaces_filtered (2 * recurse
, stream
);
474 fprintf_filtered (stream
, "}");
477 /* See val_print for a description of the various parameters of this
478 function; they are identical. The semantics of the return value is
479 also identical to val_print. */
482 java_val_print (struct type
*type
, const gdb_byte
*valaddr
,
483 int embedded_offset
, CORE_ADDR address
,
484 struct ui_file
*stream
, int recurse
,
485 const struct value
*val
,
486 const struct value_print_options
*options
)
488 struct gdbarch
*gdbarch
= get_type_arch (type
);
489 unsigned int i
= 0; /* Number of characters printed. */
490 struct type
*target_type
;
493 CHECK_TYPEDEF (type
);
494 switch (TYPE_CODE (type
))
497 if (options
->format
&& options
->format
!= 's')
499 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
500 val
, options
, 0, stream
);
504 if (options
->vtblprint
&& cp_is_vtbl_ptr_type (type
))
506 /* Print the unmangled name if desired. */
507 /* Print vtable entry - we only get here if we ARE using
508 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
509 /* Extract an address, assume that it is unsigned. */
510 print_address_demangle
512 extract_unsigned_integer (valaddr
+ embedded_offset
,
518 addr
= unpack_pointer (type
, valaddr
+ embedded_offset
);
521 fputs_filtered ("null", stream
);
524 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
526 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
528 /* Try to print what function it points to. */
529 print_address_demangle (gdbarch
, addr
, stream
, demangle
);
530 /* Return value is irrelevant except for string pointers. */
534 if (options
->addressprint
&& options
->format
!= 's')
536 fputs_filtered ("@", stream
);
537 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
544 /* Can't just call c_val_print because that prints bytes as C
546 if (options
->format
|| options
->output_format
)
548 struct value_print_options opts
= *options
;
550 opts
.format
= (options
->format
? options
->format
551 : options
->output_format
);
552 val_print_scalar_formatted (type
, valaddr
, embedded_offset
,
553 val
, &opts
, 0, stream
);
555 else if (TYPE_CODE (type
) == TYPE_CODE_CHAR
556 || (TYPE_CODE (type
) == TYPE_CODE_INT
557 && TYPE_LENGTH (type
) == 2
558 && strcmp (TYPE_NAME (type
), "char") == 0))
559 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
+ embedded_offset
),
562 val_print_type_code_int (type
, valaddr
+ embedded_offset
, stream
);
565 case TYPE_CODE_STRUCT
:
566 java_print_value_fields (type
, valaddr
, embedded_offset
,
567 address
, stream
, recurse
, val
, options
);
571 return c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
572 recurse
, val
, options
);
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