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 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, int format,
39 enum val_prettyprint pretty)
46 type = value_type (val);
47 address = VALUE_ADDRESS (val) + value_offset (val);
49 if (is_object_type (type))
53 /* Get the run-time type, and cast the object into that */
55 obj_addr = unpack_pointer (type, value_contents (val));
59 type = type_from_class (java_class_from_object (val));
60 type = lookup_pointer_type (type);
62 val = value_at (type, address);
66 if (TYPE_CODE (type) == TYPE_CODE_PTR && !value_logical_not (val))
67 type_print (TYPE_TARGET_TYPE (type), "", stream, -1);
69 name = TYPE_TAG_NAME (type);
70 if (TYPE_CODE (type) == TYPE_CODE_STRUCT && name != NULL
71 && (i = strlen (name), name[i - 1] == ']'))
75 unsigned int things_printed = 0;
77 struct type *el_type = java_primitive_type_from_name (name, i - 2);
80 read_memory (address + JAVA_OBJECT_SIZE, buf4, 4);
82 length = (long) extract_signed_integer (buf4, 4);
83 fprintf_filtered (stream, "{length: %ld", length);
88 CORE_ADDR next_element = -1; /* dummy initial value */
90 address += JAVA_OBJECT_SIZE + 4; /* Skip object header and length. */
92 while (i < length && things_printed < print_max)
96 buf = alloca (gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT);
97 fputs_filtered (", ", stream);
98 wrap_here (n_spaces (2));
101 element = next_element;
104 read_memory (address, buf, sizeof (buf));
105 address += gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT;
106 /* FIXME: cagney/2003-05-24: Bogus or what. It
107 pulls a host sized pointer out of the target and
108 then extracts that as an address (while assuming
109 that the address is unsigned)! */
110 element = extract_unsigned_integer (buf, sizeof (buf));
113 for (reps = 1; i + reps < length; reps++)
115 read_memory (address, buf, sizeof (buf));
116 address += gdbarch_ptr_bit (current_gdbarch) / HOST_CHAR_BIT;
117 /* FIXME: cagney/2003-05-24: Bogus or what. It
118 pulls a host sized pointer out of the target and
119 then extracts that as an address (while assuming
120 that the address is unsigned)! */
121 next_element = extract_unsigned_integer (buf, sizeof (buf));
122 if (next_element != element)
127 fprintf_filtered (stream, "%d: ", i);
129 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
132 fprintf_filtered (stream, "null");
134 fprintf_filtered (stream, "@%s", paddr_nz (element));
142 struct value *v = allocate_value (el_type);
143 struct value *next_v = allocate_value (el_type);
145 VALUE_ADDRESS (v) = address + JAVA_OBJECT_SIZE + 4;
146 VALUE_ADDRESS (next_v) = VALUE_ADDRESS (v);
148 while (i < length && things_printed < print_max)
150 fputs_filtered (", ", stream);
151 wrap_here (n_spaces (2));
163 set_value_lazy (v, 1);
164 set_value_offset (v, 0);
167 set_value_offset (next_v, value_offset (v));
169 for (reps = 1; i + reps < length; reps++)
171 set_value_lazy (next_v, 1);
172 set_value_offset (next_v, value_offset (next_v) + TYPE_LENGTH (el_type));
173 if (memcmp (value_contents (v), value_contents (next_v),
174 TYPE_LENGTH (el_type)) != 0)
179 fprintf_filtered (stream, "%d: ", i);
181 fprintf_filtered (stream, "%d..%d: ", i, i + reps - 1);
183 common_val_print (v, stream, format, 2, 1, pretty);
191 fprintf_filtered (stream, "...");
193 fprintf_filtered (stream, "}");
198 /* If it's type String, print it */
200 if (TYPE_CODE (type) == TYPE_CODE_PTR
201 && TYPE_TARGET_TYPE (type)
202 && TYPE_TAG_NAME (TYPE_TARGET_TYPE (type))
203 && strcmp (TYPE_TAG_NAME (TYPE_TARGET_TYPE (type)),
204 "java.lang.String") == 0
205 && (format == 0 || format == 's')
207 && value_as_address (val) != 0)
209 struct value *data_val;
211 struct value *boffset_val;
212 unsigned long boffset;
213 struct value *count_val;
217 mark = value_mark (); /* Remember start of new values */
219 data_val = value_struct_elt (&val, NULL, "data", NULL, NULL);
220 data = value_as_address (data_val);
222 boffset_val = value_struct_elt (&val, NULL, "boffset", NULL, NULL);
223 boffset = value_as_address (boffset_val);
225 count_val = value_struct_elt (&val, NULL, "count", NULL, NULL);
226 count = value_as_address (count_val);
228 value_free_to_mark (mark); /* Release unnecessary values */
230 val_print_string (data + boffset, count, 2, stream);
235 return common_val_print (val, stream, format, 1, 0, pretty);
238 /* TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and PRETTY have the
239 same meanings as in cp_print_value and c_val_print.
241 DONT_PRINT is an array of baseclass types that we
242 should not print, or zero if called from top level. */
245 java_print_value_fields (struct type *type, const gdb_byte *valaddr,
246 CORE_ADDR address, struct ui_file *stream,
247 int format, int recurse, enum val_prettyprint pretty)
249 int i, len, n_baseclasses;
251 CHECK_TYPEDEF (type);
253 fprintf_filtered (stream, "{");
254 len = TYPE_NFIELDS (type);
255 n_baseclasses = TYPE_N_BASECLASSES (type);
257 if (n_baseclasses > 0)
259 int i, n_baseclasses = TYPE_N_BASECLASSES (type);
261 for (i = 0; i < n_baseclasses; i++)
264 struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
265 char *basename = TYPE_NAME (baseclass);
266 const gdb_byte *base_valaddr;
268 if (BASETYPE_VIA_VIRTUAL (type, i))
271 if (basename != NULL && strcmp (basename, "java.lang.Object") == 0)
278 fprintf_filtered (stream, "\n");
279 print_spaces_filtered (2 * (recurse + 1), stream);
281 fputs_filtered ("<", stream);
282 /* Not sure what the best notation is in the case where there is no
284 fputs_filtered (basename ? basename : "", stream);
285 fputs_filtered ("> = ", stream);
287 base_valaddr = valaddr;
289 java_print_value_fields (baseclass, base_valaddr, address + boffset,
290 stream, format, recurse + 1, pretty);
291 fputs_filtered (", ", stream);
296 if (!len && n_baseclasses == 1)
297 fprintf_filtered (stream, "<No data fields>");
302 for (i = n_baseclasses; i < len; i++)
304 /* If requested, skip printing of static fields. */
305 if (TYPE_FIELD_STATIC (type, i))
307 char *name = TYPE_FIELD_NAME (type, i);
308 if (!static_field_print)
310 if (name != NULL && strcmp (name, "class") == 0)
314 fprintf_filtered (stream, ", ");
315 else if (n_baseclasses > 0)
319 fprintf_filtered (stream, "\n");
320 print_spaces_filtered (2 + 2 * recurse, stream);
321 fputs_filtered ("members of ", stream);
322 fputs_filtered (type_name_no_tag (type), stream);
323 fputs_filtered (": ", stream);
330 fprintf_filtered (stream, "\n");
331 print_spaces_filtered (2 + 2 * recurse, stream);
335 wrap_here (n_spaces (2 + 2 * recurse));
339 if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
340 fputs_filtered ("\"( ptr \"", stream);
342 fputs_filtered ("\"( nodef \"", stream);
343 if (TYPE_FIELD_STATIC (type, i))
344 fputs_filtered ("static ", stream);
345 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
347 DMGL_PARAMS | DMGL_ANSI);
348 fputs_filtered ("\" \"", stream);
349 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
351 DMGL_PARAMS | DMGL_ANSI);
352 fputs_filtered ("\") \"", stream);
356 annotate_field_begin (TYPE_FIELD_TYPE (type, i));
358 if (TYPE_FIELD_STATIC (type, i))
359 fputs_filtered ("static ", stream);
360 fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
362 DMGL_PARAMS | DMGL_ANSI);
363 annotate_field_name_end ();
364 fputs_filtered (": ", stream);
365 annotate_field_value ();
368 if (!TYPE_FIELD_STATIC (type, i) && TYPE_FIELD_PACKED (type, i))
372 /* Bitfields require special handling, especially due to byte
374 if (TYPE_FIELD_IGNORE (type, i))
376 fputs_filtered ("<optimized out or zero length>", stream);
380 v = value_from_longest (TYPE_FIELD_TYPE (type, i),
381 unpack_field_as_long (type, valaddr, i));
383 common_val_print (v, stream, format, 0, recurse + 1, pretty);
388 if (TYPE_FIELD_IGNORE (type, i))
390 fputs_filtered ("<optimized out or zero length>", stream);
392 else if (TYPE_FIELD_STATIC (type, i))
394 struct value *v = value_static_field (type, i);
396 fputs_filtered ("<optimized out>", stream);
399 struct type *t = check_typedef (value_type (v));
400 if (TYPE_CODE (t) == TYPE_CODE_STRUCT)
402 common_val_print (v, stream, format, 0, recurse + 1,
406 else if (TYPE_FIELD_TYPE (type, i) == NULL)
407 fputs_filtered ("<unknown type>", stream);
410 val_print (TYPE_FIELD_TYPE (type, i),
411 valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0,
412 address + TYPE_FIELD_BITPOS (type, i) / 8,
413 stream, format, 0, recurse + 1, pretty);
416 annotate_field_end ();
421 fprintf_filtered (stream, "\n");
422 print_spaces_filtered (2 * recurse, stream);
425 fprintf_filtered (stream, "}");
428 /* Print data of type TYPE located at VALADDR (within GDB), which came from
429 the inferior at address ADDRESS, onto stdio stream STREAM according to
430 FORMAT (a letter or 0 for natural format). The data at VALADDR is in
433 If the data are a string pointer, returns the number of string characters
436 If DEREF_REF is nonzero, then dereference references, otherwise just print
439 The PRETTY parameter controls prettyprinting. */
442 java_val_print (struct type *type, const gdb_byte *valaddr,
443 int embedded_offset, CORE_ADDR address,
444 struct ui_file *stream, int format, int deref_ref,
445 int recurse, enum val_prettyprint pretty)
447 unsigned int i = 0; /* Number of characters printed */
448 struct type *target_type;
451 CHECK_TYPEDEF (type);
452 switch (TYPE_CODE (type))
455 if (format && format != 's')
457 print_scalar_formatted (valaddr, type, format, 0, stream);
461 if (vtblprint && cp_is_vtbl_ptr_type (type))
463 /* Print the unmangled name if desired. */
464 /* Print vtable entry - we only get here if we ARE using
465 -fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
466 /* Extract an address, assume that it is unsigned. */
467 print_address_demangle (extract_unsigned_integer (valaddr, TYPE_LENGTH (type)),
472 addr = unpack_pointer (type, valaddr);
475 fputs_filtered ("null", stream);
478 target_type = check_typedef (TYPE_TARGET_TYPE (type));
480 if (TYPE_CODE (target_type) == TYPE_CODE_FUNC)
482 /* Try to print what function it points to. */
483 print_address_demangle (addr, stream, demangle);
484 /* Return value is irrelevant except for string pointers. */
488 if (addressprint && format != 's')
490 fputs_filtered ("@", stream);
491 print_longest (stream, 'x', 0, (ULONGEST) addr);
498 /* Can't just call c_val_print because that prints bytes as C
500 format = format ? format : output_format;
502 print_scalar_formatted (valaddr, type, format, 0, stream);
503 else if (TYPE_CODE (type) == TYPE_CODE_CHAR
504 || (TYPE_CODE (type) == TYPE_CODE_INT
505 && TYPE_LENGTH (type) == 2
506 && strcmp (TYPE_NAME (type), "char") == 0))
507 LA_PRINT_CHAR ((int) unpack_long (type, valaddr), stream);
509 val_print_type_code_int (type, valaddr, stream);
512 case TYPE_CODE_STRUCT:
513 java_print_value_fields (type, valaddr, address, stream, format,
518 return c_val_print (type, valaddr, embedded_offset, address, stream,
519 format, deref_ref, recurse, pretty);