1 /* Support for printing Java values for GDB, the GNU debugger.
2 Copyright 1997, 1998, 1999, 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"
33 #include "gdb_string.h"
37 static void java_print_value_fields (struct type
* type
, char *valaddr
,
39 struct ui_file
*stream
, int format
,
41 enum val_prettyprint pretty
);
45 java_value_print (struct value
*val
, struct ui_file
*stream
, int format
,
46 enum val_prettyprint pretty
)
53 type
= VALUE_TYPE (val
);
54 address
= VALUE_ADDRESS (val
) + VALUE_OFFSET (val
);
56 if (is_object_type (type
))
60 /* Get the run-time type, and cast the object into that */
62 obj_addr
= unpack_pointer (type
, VALUE_CONTENTS (val
));
66 type
= type_from_class (java_class_from_object (val
));
67 type
= lookup_pointer_type (type
);
69 val
= value_at (type
, address
, NULL
);
73 if (TYPE_CODE (type
) == TYPE_CODE_PTR
&& !value_logical_not (val
))
74 type_print (TYPE_TARGET_TYPE (type
), "", stream
, -1);
76 name
= TYPE_TAG_NAME (type
);
77 if (TYPE_CODE (type
) == TYPE_CODE_STRUCT
&& name
!= NULL
78 && (i
= strlen (name
), name
[i
- 1] == ']'))
82 unsigned int things_printed
= 0;
84 struct type
*el_type
= java_primitive_type_from_name (name
, i
- 2);
87 read_memory (address
+ JAVA_OBJECT_SIZE
, buf4
, 4);
89 length
= (long) extract_signed_integer (buf4
, 4);
90 fprintf_filtered (stream
, "{length: %ld", length
);
95 CORE_ADDR next_element
= -1; /* dummy initial value */
97 address
+= JAVA_OBJECT_SIZE
+ 4; /* Skip object header and length. */
99 while (i
< length
&& things_printed
< print_max
)
103 buf
= alloca (TARGET_PTR_BIT
/ 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
+= TARGET_PTR_BIT
/ 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
));
120 for (reps
= 1; i
+ reps
< length
; reps
++)
122 read_memory (address
, buf
, sizeof (buf
));
123 address
+= TARGET_PTR_BIT
/ HOST_CHAR_BIT
;
124 /* FIXME: cagney/2003-05-24: Bogus or what. It
125 pulls a host sized pointer out of the target and
126 then extracts that as an address (while assuming
127 that the address is unsigned)! */
128 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", paddr_nz (element
));
149 struct value
*v
= allocate_value (el_type
);
150 struct value
*next_v
= allocate_value (el_type
);
152 VALUE_ADDRESS (v
) = address
+ JAVA_OBJECT_SIZE
+ 4;
153 VALUE_ADDRESS (next_v
) = VALUE_ADDRESS (v
);
155 while (i
< length
&& things_printed
< print_max
)
157 fputs_filtered (", ", stream
);
158 wrap_here (n_spaces (2));
171 VALUE_OFFSET (v
) = 0;
174 VALUE_OFFSET (next_v
) = VALUE_OFFSET (v
);
176 for (reps
= 1; i
+ reps
< length
; reps
++)
178 VALUE_LAZY (next_v
) = 1;
179 VALUE_OFFSET (next_v
) += TYPE_LENGTH (el_type
);
180 if (memcmp (VALUE_CONTENTS (v
), VALUE_CONTENTS (next_v
),
181 TYPE_LENGTH (el_type
)) != 0)
186 fprintf_filtered (stream
, "%d: ", i
);
188 fprintf_filtered (stream
, "%d..%d: ", i
, i
+ reps
- 1);
190 val_print (VALUE_TYPE (v
), VALUE_CONTENTS (v
), 0, 0,
191 stream
, format
, 2, 1, pretty
);
199 fprintf_filtered (stream
, "...");
201 fprintf_filtered (stream
, "}");
206 /* If it's type String, print it */
208 if (TYPE_CODE (type
) == TYPE_CODE_PTR
209 && TYPE_TARGET_TYPE (type
)
210 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
))
211 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type
)),
212 "java.lang.String") == 0
213 && (format
== 0 || format
== 's')
215 && value_as_address (val
) != 0)
217 struct value
*data_val
;
219 struct value
*boffset_val
;
220 unsigned long boffset
;
221 struct value
*count_val
;
225 mark
= value_mark (); /* Remember start of new values */
227 data_val
= value_struct_elt (&val
, NULL
, "data", NULL
, NULL
);
228 data
= value_as_address (data_val
);
230 boffset_val
= value_struct_elt (&val
, NULL
, "boffset", NULL
, NULL
);
231 boffset
= value_as_address (boffset_val
);
233 count_val
= value_struct_elt (&val
, NULL
, "count", NULL
, NULL
);
234 count
= value_as_address (count_val
);
236 value_free_to_mark (mark
); /* Release unnecessary values */
238 val_print_string (data
+ boffset
, count
, 2, stream
);
243 return (val_print (type
, VALUE_CONTENTS (val
), 0, address
,
244 stream
, format
, 1, 0, pretty
));
247 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
248 same meanings as in cp_print_value and c_val_print.
250 DONT_PRINT is an array of baseclass types that we
251 should not print, or zero if called from top level. */
254 java_print_value_fields (struct type
*type
, char *valaddr
, CORE_ADDR address
,
255 struct ui_file
*stream
, int format
, int recurse
,
256 enum val_prettyprint pretty
)
258 int i
, len
, n_baseclasses
;
260 CHECK_TYPEDEF (type
);
262 fprintf_filtered (stream
, "{");
263 len
= TYPE_NFIELDS (type
);
264 n_baseclasses
= TYPE_N_BASECLASSES (type
);
266 if (n_baseclasses
> 0)
268 int i
, n_baseclasses
= TYPE_N_BASECLASSES (type
);
270 for (i
= 0; i
< n_baseclasses
; i
++)
273 struct type
*baseclass
= check_typedef (TYPE_BASECLASS (type
, i
));
274 char *basename
= TYPE_NAME (baseclass
);
277 if (BASETYPE_VIA_VIRTUAL (type
, i
))
280 if (basename
!= NULL
&& strcmp (basename
, "java.lang.Object") == 0)
287 fprintf_filtered (stream
, "\n");
288 print_spaces_filtered (2 * (recurse
+ 1), stream
);
290 fputs_filtered ("<", stream
);
291 /* Not sure what the best notation is in the case where there is no
293 fputs_filtered (basename
? basename
: "", stream
);
294 fputs_filtered ("> = ", stream
);
296 base_valaddr
= valaddr
;
298 java_print_value_fields (baseclass
, base_valaddr
, address
+ boffset
,
299 stream
, format
, recurse
+ 1, pretty
);
300 fputs_filtered (", ", stream
);
308 if (!len
&& n_baseclasses
== 1)
309 fprintf_filtered (stream
, "<No data fields>");
314 for (i
= n_baseclasses
; i
< len
; i
++)
316 /* If requested, skip printing of static fields. */
317 if (TYPE_FIELD_STATIC (type
, i
))
319 char *name
= TYPE_FIELD_NAME (type
, i
);
320 if (!static_field_print
)
322 if (name
!= NULL
&& strcmp (name
, "class") == 0)
326 fprintf_filtered (stream
, ", ");
327 else if (n_baseclasses
> 0)
331 fprintf_filtered (stream
, "\n");
332 print_spaces_filtered (2 + 2 * recurse
, stream
);
333 fputs_filtered ("members of ", stream
);
334 fputs_filtered (type_name_no_tag (type
), stream
);
335 fputs_filtered (": ", stream
);
342 fprintf_filtered (stream
, "\n");
343 print_spaces_filtered (2 + 2 * recurse
, stream
);
347 wrap_here (n_spaces (2 + 2 * recurse
));
351 if (TYPE_CODE (TYPE_FIELD_TYPE (type
, i
)) == TYPE_CODE_PTR
)
352 fputs_filtered ("\"( ptr \"", stream
);
354 fputs_filtered ("\"( nodef \"", stream
);
355 if (TYPE_FIELD_STATIC (type
, i
))
356 fputs_filtered ("static ", stream
);
357 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
359 DMGL_PARAMS
| DMGL_ANSI
);
360 fputs_filtered ("\" \"", stream
);
361 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
363 DMGL_PARAMS
| DMGL_ANSI
);
364 fputs_filtered ("\") \"", stream
);
368 annotate_field_begin (TYPE_FIELD_TYPE (type
, i
));
370 if (TYPE_FIELD_STATIC (type
, i
))
371 fputs_filtered ("static ", stream
);
372 fprintf_symbol_filtered (stream
, TYPE_FIELD_NAME (type
, i
),
374 DMGL_PARAMS
| DMGL_ANSI
);
375 annotate_field_name_end ();
376 fputs_filtered (": ", stream
);
377 annotate_field_value ();
380 if (!TYPE_FIELD_STATIC (type
, i
) && TYPE_FIELD_PACKED (type
, i
))
384 /* Bitfields require special handling, especially due to byte
386 if (TYPE_FIELD_IGNORE (type
, i
))
388 fputs_filtered ("<optimized out or zero length>", stream
);
392 v
= value_from_longest (TYPE_FIELD_TYPE (type
, i
),
393 unpack_field_as_long (type
, valaddr
, i
));
395 val_print (TYPE_FIELD_TYPE (type
, i
), VALUE_CONTENTS (v
), 0,
396 0, stream
, format
, 0, recurse
+ 1, pretty
);
401 if (TYPE_FIELD_IGNORE (type
, i
))
403 fputs_filtered ("<optimized out or zero length>", stream
);
405 else if (TYPE_FIELD_STATIC (type
, i
))
407 struct value
*v
= value_static_field (type
, i
);
409 fputs_filtered ("<optimized out>", stream
);
412 struct type
*t
= check_typedef (VALUE_TYPE (v
));
413 if (TYPE_CODE (t
) == TYPE_CODE_STRUCT
)
415 val_print (VALUE_TYPE (v
),
416 VALUE_CONTENTS (v
), 0, VALUE_ADDRESS (v
),
417 stream
, format
, 0, recurse
+ 1, pretty
);
420 else if (TYPE_FIELD_TYPE (type
, i
) == NULL
)
421 fputs_filtered ("<unknown type>", stream
);
424 val_print (TYPE_FIELD_TYPE (type
, i
),
425 valaddr
+ TYPE_FIELD_BITPOS (type
, i
) / 8, 0,
426 address
+ TYPE_FIELD_BITPOS (type
, i
) / 8,
427 stream
, format
, 0, recurse
+ 1, pretty
);
430 annotate_field_end ();
435 fprintf_filtered (stream
, "\n");
436 print_spaces_filtered (2 * recurse
, stream
);
439 fprintf_filtered (stream
, "}");
442 /* Print data of type TYPE located at VALADDR (within GDB), which came from
443 the inferior at address ADDRESS, onto stdio stream STREAM according to
444 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
447 If the data are a string pointer, returns the number of string characters
450 If DEREF_REF is nonzero, then dereference references, otherwise just print
453 The PRETTY parameter controls prettyprinting. */
456 java_val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
457 CORE_ADDR address
, struct ui_file
*stream
, int format
,
458 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
460 unsigned int i
= 0; /* Number of characters printed */
461 struct type
*target_type
;
464 CHECK_TYPEDEF (type
);
465 switch (TYPE_CODE (type
))
468 if (format
&& format
!= 's')
470 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
474 if (vtblprint
&& cp_is_vtbl_ptr_type (type
))
476 /* Print the unmangled name if desired. */
477 /* Print vtable entry - we only get here if we ARE using
478 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
479 /* Extract an address, assume that it is unsigned. */
480 print_address_demangle (extract_unsigned_integer (valaddr
, TYPE_LENGTH (type
)),
485 addr
= unpack_pointer (type
, valaddr
);
488 fputs_filtered ("null", stream
);
491 target_type
= check_typedef (TYPE_TARGET_TYPE (type
));
493 if (TYPE_CODE (target_type
) == TYPE_CODE_FUNC
)
495 /* Try to print what function it points to. */
496 print_address_demangle (addr
, stream
, demangle
);
497 /* Return value is irrelevant except for string pointers. */
501 if (addressprint
&& format
!= 's')
503 fputs_filtered ("@", stream
);
504 print_longest (stream
, 'x', 0, (ULONGEST
) addr
);
511 /* Can't just call c_val_print because that prints bytes as C
513 format
= format
? format
: output_format
;
515 print_scalar_formatted (valaddr
, type
, format
, 0, stream
);
516 else if (TYPE_CODE (type
) == TYPE_CODE_CHAR
517 || (TYPE_CODE (type
) == TYPE_CODE_INT
518 && TYPE_LENGTH (type
) == 2
519 && strcmp (TYPE_NAME (type
), "char") == 0))
520 LA_PRINT_CHAR ((int) unpack_long (type
, valaddr
), stream
);
522 val_print_type_code_int (type
, valaddr
, stream
);
525 case TYPE_CODE_STRUCT
:
526 java_print_value_fields (type
, valaddr
, address
, stream
, format
,
531 return c_val_print (type
, valaddr
, embedded_offset
, address
, stream
,
532 format
, deref_ref
, recurse
, pretty
);
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