1 /* Support for printing Java values for GDB, the GNU debugger.
3 Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 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"
40 java_value_print (struct value *val, struct ui_file *stream, int format,
41 enum val_prettyprint pretty)
48 type = value_type (val);
49 address = VALUE_ADDRESS (val) + value_offset (val);
51 if (is_object_type (type))
55 /* Get the run-time type, and cast the object into that */
57 obj_addr = unpack_pointer (type, value_contents (val));
61 type = type_from_class (java_class_from_object (val));
62 type = lookup_pointer_type (type);
64 val = value_at (type, address);
68 if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))
69 type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
71 name = TYPE_TAG_NAME (type);
72 if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
73 && (i = strlen (name), name[i - 1] == ']'))
77 unsigned int things_printed = 0;
79 struct type *el_type = java_primitive_type_from_name (name, i - 2);
82 read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
84 length = (long) extract_signed_integer (buf4, 4);
85 fprintf_filtered (stream, "{length: %ld", length);
90 CORE_ADDR next_element = -1; /* dummy initial value */
92 address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */
94 while (i < length && things_printed < print_max)
98 buf = alloca (TARGET_PTR_BIT / HOST_CHAR_BIT);
99 fputs_filtered (", ", stream);
100 wrap_here (n_spaces (2));
103 element = next_element;
106 read_memory (address, buf, sizeof (buf));
107 address += TARGET_PTR_BIT / HOST_CHAR_BIT;
108 /* FIXME: cagney/2003-05-24: Bogus or what. It
109 pulls a host sized pointer out of the target and
110 then extracts that as an address (while assuming
111 that the address is unsigned)! */
112 element = extract_unsigned_integer (buf, sizeof (buf));
115 for (reps = 1; i + reps < length; reps++)
117 read_memory (address, buf, sizeof (buf));
118 address += TARGET_PTR_BIT / HOST_CHAR_BIT;
119 /* FIXME: cagney/2003-05-24: Bogus or what. It
120 pulls a host sized pointer out of the target and
121 then extracts that as an address (while assuming
122 that the address is unsigned)! */
123 next_element = extract_unsigned_integer (buf, sizeof (buf));
124 if (next_element != element)
129 fprintf_filtered (stream, "%d: ", i);
131 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
134 fprintf_filtered (stream, "null");
136 fprintf_filtered (stream, "@%s", paddr_nz (element));
144 struct value *v = allocate_value (el_type);
145 struct value *next_v = allocate_value (el_type);
147 VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
148 VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
150 while (i < length && things_printed < print_max)
152 fputs_filtered (", ", stream);
153 wrap_here (n_spaces (2));
169 next_v->offset = value_offset (v);
171 for (reps = 1; i + reps < length; reps++)
173 VALUE_LAZY (next_v) = 1;
174 next_v->offset += TYPE_LENGTH (el_type);
175 if (memcmp (value_contents (v), value_contents (next_v),
176 TYPE_LENGTH (el_type)) != 0)
181 fprintf_filtered (stream, "%d: ", i);
183 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
185 val_print (value_type (v), value_contents (v), 0, 0,
186 stream, format, 2, 1, pretty);
194 fprintf_filtered (stream, "...");
196 fprintf_filtered (stream, "}");
201 /* If it's type String, print it */
203 if (TYPE_CODE (type) == TYPE_CODE_PTR
204 && TYPE_TARGET_TYPE (type)
205 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type))
206 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type)),
207 "java.lang.String") == 0
208 && (format == 0 || format == 's')
210 && value_as_address (val) != 0)
212 struct value *data_val;
214 struct value *boffset_val;
215 unsigned long boffset;
216 struct value *count_val;
220 mark = value_mark (); /* Remember start of new values */
222 data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
223 data = value_as_address (data_val);
225 boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
226 boffset = value_as_address (boffset_val);
228 count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
229 count = value_as_address (count_val);
231 value_free_to_mark (mark); /* Release unnecessary values */
233 val_print_string (data + boffset, count, 2, stream);
238 return (val_print (type, value_contents (val), 0, address,
239 stream, format, 1, 0, pretty));
242 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
243 same meanings as in cp_print_value and c_val_print.
245 DONT_PRINT is an array of baseclass types that we
246 should not print, or zero if called from top level. */
249 java_print_value_fields (struct type *type, const bfd_byte *valaddr,
250 CORE_ADDR address, struct ui_file *stream,
251 int format, int recurse, enum val_prettyprint pretty)
253 int i, len, n_baseclasses;
255 CHECK_TYPEDEF (type);
257 fprintf_filtered (stream, "{");
258 len = TYPE_NFIELDS (type);
259 n_baseclasses = TYPE_N_BASECLASSES (type);
261 if (n_baseclasses > 0)
263 int i, n_baseclasses = TYPE_N_BASECLASSES (type);
265 for (i = 0; i < n_baseclasses; i++)
268 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
269 char *basename = TYPE_NAME (baseclass);
270 const bfd_byte *base_valaddr;
272 if (BASETYPE_VIA_VIRTUAL (type, i))
275 if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
282 fprintf_filtered (stream, "\n");
283 print_spaces_filtered (2 * (recurse + 1), stream);
285 fputs_filtered ("<", stream);
286 /* Not sure what the best notation is in the case where there is no
288 fputs_filtered (basename ? basename : "", stream);
289 fputs_filtered ("> = ", stream);
291 base_valaddr = valaddr;
293 java_print_value_fields (baseclass, base_valaddr, address + boffset,
294 stream, format, recurse + 1, pretty);
295 fputs_filtered (", ", stream);
300 if (!len && n_baseclasses == 1)
301 fprintf_filtered (stream, "<No data fields>");
306 for (i = n_baseclasses; i < len; i++)
308 /* If requested, skip printing of static fields. */
309 if (TYPE_FIELD_STATIC (type, i))
311 char *name = TYPE_FIELD_NAME (type, i);
312 if (!static_field_print)
314 if (name != NULL && strcmp (name, "class") == 0)
318 fprintf_filtered (stream, ", ");
319 else if (n_baseclasses > 0)
323 fprintf_filtered (stream, "\n");
324 print_spaces_filtered (2 + 2 * recurse, stream);
325 fputs_filtered ("members of ", stream);
326 fputs_filtered (type_name_no_tag (type), stream);
327 fputs_filtered (": ", stream);
334 fprintf_filtered (stream, "\n");
335 print_spaces_filtered (2 + 2 * recurse, stream);
339 wrap_here (n_spaces (2 + 2 * recurse));
343 if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
344 fputs_filtered ("\"( ptr \"", stream);
346 fputs_filtered ("\"( nodef \"", stream);
347 if (TYPE_FIELD_STATIC (type, i))
348 fputs_filtered ("static ", stream);
349 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
351 DMGL_PARAMS | DMGL_ANSI);
352 fputs_filtered ("\" \"", stream);
353 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
355 DMGL_PARAMS | DMGL_ANSI);
356 fputs_filtered ("\") \"", stream);
360 annotate_field_begin (TYPE_FIELD_TYPE (type, i));
362 if (TYPE_FIELD_STATIC (type, i))
363 fputs_filtered ("static ", stream);
364 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
366 DMGL_PARAMS | DMGL_ANSI);
367 annotate_field_name_end ();
368 fputs_filtered (": ", stream);
369 annotate_field_value ();
372 if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
376 /* Bitfields require special handling, especially due to byte
378 if (TYPE_FIELD_IGNORE (type, i))
380 fputs_filtered ("<optimized out or zero length>", stream);
384 v = value_from_longest (TYPE_FIELD_TYPE (type, i),
385 unpack_field_as_long (type, valaddr, i));
387 val_print (TYPE_FIELD_TYPE (type, i), value_contents (v), 0,
388 0, stream, format, 0, recurse + 1, pretty);
393 if (TYPE_FIELD_IGNORE (type, i))
395 fputs_filtered ("<optimized out or zero length>", stream);
397 else if (TYPE_FIELD_STATIC (type, i))
399 struct value *v = value_static_field (type, i);
401 fputs_filtered ("<optimized out>", stream);
404 struct type *t = check_typedef (value_type (v));
405 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
407 val_print (value_type (v),
408 value_contents (v), 0, VALUE_ADDRESS (v),
409 stream, format, 0, recurse + 1, pretty);
412 else if (TYPE_FIELD_TYPE (type, i) == NULL)
413 fputs_filtered ("<unknown type>", stream);
416 val_print (TYPE_FIELD_TYPE (type, i),
417 valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,
418 address + TYPE_FIELD_BITPOS (type, i) / 8,
419 stream, format, 0, recurse + 1, pretty);
422 annotate_field_end ();
427 fprintf_filtered (stream, "\n");
428 print_spaces_filtered (2 * recurse, stream);
431 fprintf_filtered (stream, "}");
434 /* Print data of type TYPE located at VALADDR (within GDB), which came from
435 the inferior at address ADDRESS, onto stdio stream STREAM according to
436 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
439 If the data are a string pointer, returns the number of string characters
442 If DEREF_REF is nonzero, then dereference references, otherwise just print
445 The PRETTY parameter controls prettyprinting. */
448 java_val_print (struct type *type, const bfd_byte *valaddr,
449 int embedded_offset, CORE_ADDR address,
450 struct ui_file *stream, int format, int deref_ref,
451 int recurse, enum val_prettyprint pretty)
453 unsigned int i = 0; /* Number of characters printed */
454 struct type *target_type;
457 CHECK_TYPEDEF (type);
458 switch (TYPE_CODE (type))
461 if (format && format != 's')
463 print_scalar_formatted (valaddr, type, format, 0, stream);
467 if (vtblprint && cp_is_vtbl_ptr_type (type))
469 /* Print the unmangled name if desired. */
470 /* Print vtable entry - we only get here if we ARE using
471 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
472 /* Extract an address, assume that it is unsigned. */
473 print_address_demangle (extract_unsigned_integer (valaddr, TYPE_LENGTH (type)),
478 addr = unpack_pointer (type, valaddr);
481 fputs_filtered ("null", stream);
484 target_type = check_typedef (TYPE_TARGET_TYPE (type));
486 if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
488 /* Try to print what function it points to. */
489 print_address_demangle (addr, stream, demangle);
490 /* Return value is irrelevant except for string pointers. */
494 if (addressprint && format != 's')
496 fputs_filtered ("@", stream);
497 print_longest (stream, 'x', 0, (ULONGEST) addr);
504 /* Can't just call c_val_print because that prints bytes as C
506 format = format ? format : output_format;
508 print_scalar_formatted (valaddr, type, format, 0, stream);
509 else if (TYPE_CODE (type) == TYPE_CODE_CHAR
510 || (TYPE_CODE (type) == TYPE_CODE_INT
511 && TYPE_LENGTH (type) == 2
512 && strcmp (TYPE_NAME (type), "char") == 0))
513 LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
515 val_print_type_code_int (type, valaddr, stream);
518 case TYPE_CODE_STRUCT:
519 java_print_value_fields (type, valaddr, address, stream, format,
524 return c_val_print (type, valaddr, embedded_offset, address, stream,
525 format, deref_ref, recurse, pretty);