1 /* Support for printing Java values for GDB, the GNU debugger.
3 Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free
4 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 2 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, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
27 #include "expression.h"
35 #include "gdb_string.h"
39 static void java_print_value_fields (struct type
* type
, char *valaddr
,
41 struct ui_file
*stream
, int format
,
43 enum val_prettyprint pretty
);
47 java_value_print (struct value
*val
, struct ui_file
*stream
, int format
,
48 enum val_prettyprint pretty
)
55 type
= VALUE_TYPE (val
);
56 address
= VALUE_ADDRESS (val
) + VALUE_OFFSET (val
);
58 if (is_object_type (type
))
62 /* Get the run-time type, and cast the object into that */
64 obj_addr
= unpack_pointer (type
, VALUE_CONTENTS (val
));
68 type
= type_from_class (java_class_from_object (val
));
69 type
= lookup_pointer_type (type
);
71 val
= value_at (type
, address
);
75 if (TYPE_CODE (type
) == TYPE_CODE_PTR
&& !value_logical_not (val
))
76 type_print (TYPE_TARGET_TYPE (type
), "", stream
, -1);
78 name
= TYPE_TAG_NAME (type
);
79 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
&& name
!= NULL
80 && (i
= strlen (name
), name
[i
- 1] == ']'))
84 unsigned int things_printed
= 0;
86 struct type
*el_type
= java_primitive_type_from_name (name
, i
- 2);
89 read_memory (address
+ JAVA_OBJECT_SIZE
, buf4
, 4);
91 length
= (long) extract_signed_integer (buf4
, 4);
92 fprintf_filtered (stream
, "{length: %ld", length
);
97 CORE_ADDR next_element
= -1; /* dummy initial value */
99 address
+= JAVA_OBJECT_SIZE
+ 4; /* Skip object header and length. */
101 while (i
< length
&& things_printed
< print_max
)
105 buf
= alloca (TARGET_PTR_BIT
/ HOST_CHAR_BIT
);
106 fputs_filtered (", ", stream
);
107 wrap_here (n_spaces (2));
110 element
= next_element
;
113 read_memory (address
, buf
, sizeof (buf
));
114 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
115 /* FIXME: cagney/2003-05-24: Bogus or what. It
116 pulls a host sized pointer out of the target and
117 then extracts that as an address (while assuming
118 that the address is unsigned)! */
119 element
= extract_unsigned_integer (buf
, sizeof (buf
));
122 for (reps
= 1; i
+ reps
< length
; reps
++)
124 read_memory (address
, buf
, sizeof (buf
));
125 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
126 /* FIXME: cagney/2003-05-24: Bogus or what. It
127 pulls a host sized pointer out of the target and
128 then extracts that as an address (while assuming
129 that the address is unsigned)! */
130 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", paddr_nz (element
));
151 struct value
*v
= allocate_value (el_type
);
152 struct value
*next_v
= allocate_value (el_type
);
154 VALUE_ADDRESS (v
) = address
+ JAVA_OBJECT_SIZE
+ 4;
155 VALUE_ADDRESS (next_v
) = VALUE_ADDRESS (v
);
157 while (i
< length
&& things_printed
< print_max
)
159 fputs_filtered (", ", stream
);
160 wrap_here (n_spaces (2));
173 VALUE_OFFSET (v
) = 0;
176 VALUE_OFFSET (next_v
) = VALUE_OFFSET (v
);
178 for (reps
= 1; i
+ reps
< length
; reps
++)
180 VALUE_LAZY (next_v
) = 1;
181 VALUE_OFFSET (next_v
) += 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);
192 val_print (VALUE_TYPE (v
), VALUE_CONTENTS (v
), 0, 0,
193 stream
, format
, 2, 1, pretty
);
201 fprintf_filtered (stream
, "...");
203 fprintf_filtered (stream
, "}");
208 /* If it's type String, print it */
210 if (TYPE_CODE (type
) == TYPE_CODE_PTR
211 && TYPE_TARGET_TYPE (type
)
212 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
))
213 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
)),
214 "java.lang.String") == 0
215 && (format
== 0 || format
== 's')
217 && value_as_address (val
) != 0)
219 struct value
*data_val
;
221 struct value
*boffset_val
;
222 unsigned long boffset
;
223 struct value
*count_val
;
227 mark
= value_mark (); /* Remember start of new values */
229 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
230 data
= value_as_address (data_val
);
232 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
233 boffset
= value_as_address (boffset_val
);
235 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
236 count
= value_as_address (count_val
);
238 value_free_to_mark (mark
); /* Release unnecessary values */
240 val_print_string (data
+ boffset
, count
, 2, stream
);
245 return (val_print (type
, VALUE_CONTENTS (val
), 0, address
,
246 stream
, format
, 1, 0, pretty
));
249 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
250 same meanings as in cp_print_value and c_val_print.
252 DONT_PRINT is an array of baseclass types that we
253 should not print, or zero if called from top level. */
256 java_print_value_fields (struct type
*type
, char *valaddr
, CORE_ADDR address
,
257 struct ui_file
*stream
, int format
, int recurse
,
258 enum val_prettyprint pretty
)
260 int i
, len
, n_baseclasses
;
262 CHECK_TYPEDEF (type
);
264 fprintf_filtered (stream
, "{");
265 len
= TYPE_NFIELDS (type
);
266 n_baseclasses
= TYPE_N_BASECLASSES (type
);
268 if (n_baseclasses
> 0)
270 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
272 for (i
= 0; i
< n_baseclasses
; i
++)
275 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
276 char *basename
= TYPE_NAME (baseclass
);
279 if (BASETYPE_VIA_VIRTUAL (type
, i
))
282 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
289 fprintf_filtered (stream
, "\n");
290 print_spaces_filtered (2 * (recurse
+ 1), stream
);
292 fputs_filtered ("<", stream
);
293 /* Not sure what the best notation is in the case where there is no
295 fputs_filtered (basename
? basename
: "", stream
);
296 fputs_filtered ("> = ", stream
);
298 base_valaddr
= valaddr
;
300 java_print_value_fields (baseclass
, base_valaddr
, address
+ boffset
,
301 stream
, format
, recurse
+ 1, pretty
);
302 fputs_filtered (", ", stream
);
307 if (!len
&& n_baseclasses
== 1)
308 fprintf_filtered (stream
, "<No data fields>");
313 for (i
= n_baseclasses
; i
< len
; i
++)
315 /* If requested, skip printing of static fields. */
316 if (TYPE_FIELD_STATIC (type
, i
))
318 char *name
= TYPE_FIELD_NAME (type
, i
);
319 if (!static_field_print
)
321 if (name
!= NULL
&& strcmp (name
, "class") == 0)
325 fprintf_filtered (stream
, ", ");
326 else if (n_baseclasses
> 0)
330 fprintf_filtered (stream
, "\n");
331 print_spaces_filtered (2 + 2 * recurse
, stream
);
332 fputs_filtered ("members of ", stream
);
333 fputs_filtered (type_name_no_tag (type
), stream
);
334 fputs_filtered (": ", stream
);
341 fprintf_filtered (stream
, "\n");
342 print_spaces_filtered (2 + 2 * recurse
, stream
);
346 wrap_here (n_spaces (2 + 2 * recurse
));
350 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
351 fputs_filtered ("\"( ptr \"", stream
);
353 fputs_filtered ("\"( nodef \"", stream
);
354 if (TYPE_FIELD_STATIC (type
, i
))
355 fputs_filtered ("static ", stream
);
356 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
358 DMGL_PARAMS
| DMGL_ANSI
);
359 fputs_filtered ("\" \"", stream
);
360 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
362 DMGL_PARAMS
| DMGL_ANSI
);
363 fputs_filtered ("\") \"", stream
);
367 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
369 if (TYPE_FIELD_STATIC (type
, i
))
370 fputs_filtered ("static ", stream
);
371 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
373 DMGL_PARAMS
| DMGL_ANSI
);
374 annotate_field_name_end ();
375 fputs_filtered (": ", stream
);
376 annotate_field_value ();
379 if (!TYPE_FIELD_STATIC (type
, i
) && TYPE_FIELD_PACKED (type
, i
))
383 /* Bitfields require special handling, especially due to byte
385 if (TYPE_FIELD_IGNORE (type
, i
))
387 fputs_filtered ("<optimized out or zero length>", stream
);
391 v
= value_from_longest (TYPE_FIELD_TYPE (type
, i
),
392 unpack_field_as_long (type
, valaddr
, i
));
394 val_print (TYPE_FIELD_TYPE (type
, i
), VALUE_CONTENTS (v
), 0,
395 0, stream
, format
, 0, recurse
+ 1, pretty
);
400 if (TYPE_FIELD_IGNORE (type
, i
))
402 fputs_filtered ("<optimized out or zero length>", stream
);
404 else if (TYPE_FIELD_STATIC (type
, i
))
406 struct value
*v
= value_static_field (type
, i
);
408 fputs_filtered ("<optimized out>", stream
);
411 struct type
*t
= check_typedef (VALUE_TYPE (v
));
412 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
414 val_print (VALUE_TYPE (v
),
415 VALUE_CONTENTS (v
), 0, VALUE_ADDRESS (v
),
416 stream
, format
, 0, recurse
+ 1, pretty
);
419 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
420 fputs_filtered ("<unknown type>", stream
);
423 val_print (TYPE_FIELD_TYPE (type
, i
),
424 valaddr
+ TYPE_FIELD_BITPOS (type
, i
) / 8, 0,
425 address
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
426 stream
, format
, 0, recurse
+ 1, pretty
);
429 annotate_field_end ();
434 fprintf_filtered (stream
, "\n");
435 print_spaces_filtered (2 * recurse
, stream
);
438 fprintf_filtered (stream
, "}");
441 /* Print data of type TYPE located at VALADDR (within GDB), which came from
442 the inferior at address ADDRESS, onto stdio stream STREAM according to
443 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
446 If the data are a string pointer, returns the number of string characters
449 If DEREF_REF is nonzero, then dereference references, otherwise just print
452 The PRETTY parameter controls prettyprinting. */
455 java_val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
456 CORE_ADDR address
, struct ui_file
*stream
, int format
,
457 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
459 unsigned int i
= 0; /* Number of characters printed */
460 struct type
*target_type
;
463 CHECK_TYPEDEF (type
);
464 switch (TYPE_CODE (type
))
467 if (format
&& format
!= 's')
469 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
473 if (vtblprint
&& cp_is_vtbl_ptr_type (type
))
475 /* Print the unmangled name if desired. */
476 /* Print vtable entry - we only get here if we ARE using
477 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
478 /* Extract an address, assume that it is unsigned. */
479 print_address_demangle (extract_unsigned_integer (valaddr
, TYPE_LENGTH (type
)),
484 addr
= unpack_pointer (type
, valaddr
);
487 fputs_filtered ("null", stream
);
490 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
492 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
494 /* Try to print what function it points to. */
495 print_address_demangle (addr
, stream
, demangle
);
496 /* Return value is irrelevant except for string pointers. */
500 if (addressprint
&& format
!= 's')
502 fputs_filtered ("@", stream
);
503 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
510 /* Can't just call c_val_print because that prints bytes as C
512 format
= format
? format
: output_format
;
514 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
515 else if (TYPE_CODE (type
) == TYPE_CODE_CHAR
516 || (TYPE_CODE (type
) == TYPE_CODE_INT
517 && TYPE_LENGTH (type
) == 2
518 && strcmp (TYPE_NAME (type
), "char") == 0))
519 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
), stream
);
521 val_print_type_code_int (type
, valaddr
, stream
);
524 case TYPE_CODE_STRUCT
:
525 java_print_value_fields (type
, valaddr
, address
, stream
, format
,
530 return c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
531 format
, deref_ref
, recurse
, pretty
);
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