| 1 | /* Support for printing Ada values for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1997, 2001, 2002, |
| 4 | 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 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. |
| 12 | |
| 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. |
| 17 | |
| 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/>. */ |
| 20 | |
| 21 | #include <ctype.h> |
| 22 | #include "defs.h" |
| 23 | #include "gdb_string.h" |
| 24 | #include "symtab.h" |
| 25 | #include "gdbtypes.h" |
| 26 | #include "expression.h" |
| 27 | #include "value.h" |
| 28 | #include "demangle.h" |
| 29 | #include "valprint.h" |
| 30 | #include "language.h" |
| 31 | #include "annotate.h" |
| 32 | #include "ada-lang.h" |
| 33 | #include "c-lang.h" |
| 34 | #include "infcall.h" |
| 35 | #include "exceptions.h" |
| 36 | |
| 37 | /* Encapsulates arguments to ada_val_print. */ |
| 38 | struct ada_val_print_args |
| 39 | { |
| 40 | struct type *type; |
| 41 | const gdb_byte *valaddr0; |
| 42 | int embedded_offset; |
| 43 | CORE_ADDR address; |
| 44 | struct ui_file *stream; |
| 45 | int format; |
| 46 | int deref_ref; |
| 47 | int recurse; |
| 48 | enum val_prettyprint pretty; |
| 49 | }; |
| 50 | |
| 51 | static void print_record (struct type *, const gdb_byte *, struct ui_file *, |
| 52 | int, int, enum val_prettyprint); |
| 53 | |
| 54 | static int print_field_values (struct type *, const gdb_byte *, |
| 55 | struct ui_file *, int, int, |
| 56 | enum val_prettyprint, int, struct type *, |
| 57 | const gdb_byte *); |
| 58 | |
| 59 | static void adjust_type_signedness (struct type *); |
| 60 | |
| 61 | static int ada_val_print_stub (void *args0); |
| 62 | |
| 63 | static int ada_val_print_1 (struct type *, const gdb_byte *, int, CORE_ADDR, |
| 64 | struct ui_file *, int, int, int, |
| 65 | enum val_prettyprint); |
| 66 | \f |
| 67 | |
| 68 | /* Make TYPE unsigned if its range of values includes no negatives. */ |
| 69 | static void |
| 70 | adjust_type_signedness (struct type *type) |
| 71 | { |
| 72 | if (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE |
| 73 | && TYPE_LOW_BOUND (type) >= 0) |
| 74 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; |
| 75 | } |
| 76 | |
| 77 | /* Assuming TYPE is a simple, non-empty array type, prints its lower bound |
| 78 | on STREAM, if non-standard (i.e., other than 1 for numbers, other |
| 79 | than lower bound of index type for enumerated type). Returns 1 |
| 80 | if something printed, otherwise 0. */ |
| 81 | |
| 82 | static int |
| 83 | print_optional_low_bound (struct ui_file *stream, struct type *type) |
| 84 | { |
| 85 | struct type *index_type; |
| 86 | long low_bound; |
| 87 | |
| 88 | if (print_array_indexes_p ()) |
| 89 | return 0; |
| 90 | |
| 91 | if (!get_array_low_bound (type, &low_bound)) |
| 92 | return 0; |
| 93 | |
| 94 | index_type = TYPE_INDEX_TYPE (type); |
| 95 | |
| 96 | if (TYPE_CODE (index_type) == TYPE_CODE_RANGE) |
| 97 | { |
| 98 | /* We need to know what the base type is, in order to do the |
| 99 | appropriate check below. Otherwise, if this is a subrange |
| 100 | of an enumerated type, where the underlying value of the |
| 101 | first element is typically 0, we might test the low bound |
| 102 | against the wrong value. */ |
| 103 | index_type = TYPE_TARGET_TYPE (index_type); |
| 104 | } |
| 105 | |
| 106 | switch (TYPE_CODE (index_type)) |
| 107 | { |
| 108 | case TYPE_CODE_ENUM: |
| 109 | if (low_bound == TYPE_FIELD_BITPOS (index_type, 0)) |
| 110 | return 0; |
| 111 | break; |
| 112 | case TYPE_CODE_UNDEF: |
| 113 | index_type = builtin_type_long; |
| 114 | /* FALL THROUGH */ |
| 115 | default: |
| 116 | if (low_bound == 1) |
| 117 | return 0; |
| 118 | break; |
| 119 | } |
| 120 | |
| 121 | ada_print_scalar (index_type, (LONGEST) low_bound, stream); |
| 122 | fprintf_filtered (stream, " => "); |
| 123 | return 1; |
| 124 | } |
| 125 | |
| 126 | /* Version of val_print_array_elements for GNAT-style packed arrays. |
| 127 | Prints elements of packed array of type TYPE at bit offset |
| 128 | BITOFFSET from VALADDR on STREAM. Formats according to FORMAT and |
| 129 | separates with commas. RECURSE is the recursion (nesting) level. |
| 130 | If PRETTY, uses "prettier" format. TYPE must have been decoded (as |
| 131 | by ada_coerce_to_simple_array). */ |
| 132 | |
| 133 | static void |
| 134 | val_print_packed_array_elements (struct type *type, const gdb_byte *valaddr, |
| 135 | int bitoffset, struct ui_file *stream, |
| 136 | int format, int recurse, |
| 137 | enum val_prettyprint pretty) |
| 138 | { |
| 139 | unsigned int i; |
| 140 | unsigned int things_printed = 0; |
| 141 | unsigned len; |
| 142 | struct type *elttype, *index_type; |
| 143 | unsigned eltlen; |
| 144 | unsigned long bitsize = TYPE_FIELD_BITSIZE (type, 0); |
| 145 | struct value *mark = value_mark (); |
| 146 | LONGEST low = 0; |
| 147 | |
| 148 | elttype = TYPE_TARGET_TYPE (type); |
| 149 | eltlen = TYPE_LENGTH (check_typedef (elttype)); |
| 150 | index_type = TYPE_INDEX_TYPE (type); |
| 151 | |
| 152 | { |
| 153 | LONGEST high; |
| 154 | if (get_discrete_bounds (TYPE_FIELD_TYPE (type, 0), &low, &high) < 0) |
| 155 | len = 1; |
| 156 | else |
| 157 | len = high - low + 1; |
| 158 | } |
| 159 | |
| 160 | i = 0; |
| 161 | annotate_array_section_begin (i, elttype); |
| 162 | |
| 163 | while (i < len && things_printed < print_max) |
| 164 | { |
| 165 | struct value *v0, *v1; |
| 166 | int i0; |
| 167 | |
| 168 | if (i != 0) |
| 169 | { |
| 170 | if (prettyprint_arrays) |
| 171 | { |
| 172 | fprintf_filtered (stream, ",\n"); |
| 173 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 174 | } |
| 175 | else |
| 176 | { |
| 177 | fprintf_filtered (stream, ", "); |
| 178 | } |
| 179 | } |
| 180 | wrap_here (n_spaces (2 + 2 * recurse)); |
| 181 | maybe_print_array_index (index_type, i + low, stream, format, pretty); |
| 182 | |
| 183 | i0 = i; |
| 184 | v0 = ada_value_primitive_packed_val (NULL, valaddr, |
| 185 | (i0 * bitsize) / HOST_CHAR_BIT, |
| 186 | (i0 * bitsize) % HOST_CHAR_BIT, |
| 187 | bitsize, elttype); |
| 188 | while (1) |
| 189 | { |
| 190 | i += 1; |
| 191 | if (i >= len) |
| 192 | break; |
| 193 | v1 = ada_value_primitive_packed_val (NULL, valaddr, |
| 194 | (i * bitsize) / HOST_CHAR_BIT, |
| 195 | (i * bitsize) % HOST_CHAR_BIT, |
| 196 | bitsize, elttype); |
| 197 | if (memcmp (value_contents (v0), value_contents (v1), eltlen) != 0) |
| 198 | break; |
| 199 | } |
| 200 | |
| 201 | if (i - i0 > repeat_count_threshold) |
| 202 | { |
| 203 | val_print (elttype, value_contents (v0), 0, 0, stream, format, |
| 204 | 0, recurse + 1, pretty); |
| 205 | annotate_elt_rep (i - i0); |
| 206 | fprintf_filtered (stream, _(" <repeats %u times>"), i - i0); |
| 207 | annotate_elt_rep_end (); |
| 208 | |
| 209 | } |
| 210 | else |
| 211 | { |
| 212 | int j; |
| 213 | for (j = i0; j < i; j += 1) |
| 214 | { |
| 215 | if (j > i0) |
| 216 | { |
| 217 | if (prettyprint_arrays) |
| 218 | { |
| 219 | fprintf_filtered (stream, ",\n"); |
| 220 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 221 | } |
| 222 | else |
| 223 | { |
| 224 | fprintf_filtered (stream, ", "); |
| 225 | } |
| 226 | wrap_here (n_spaces (2 + 2 * recurse)); |
| 227 | maybe_print_array_index (index_type, j + low, |
| 228 | stream, format, pretty); |
| 229 | } |
| 230 | val_print (elttype, value_contents (v0), 0, 0, stream, format, |
| 231 | 0, recurse + 1, pretty); |
| 232 | annotate_elt (); |
| 233 | } |
| 234 | } |
| 235 | things_printed += i - i0; |
| 236 | } |
| 237 | annotate_array_section_end (); |
| 238 | if (i < len) |
| 239 | { |
| 240 | fprintf_filtered (stream, "..."); |
| 241 | } |
| 242 | |
| 243 | value_free_to_mark (mark); |
| 244 | } |
| 245 | |
| 246 | static struct type * |
| 247 | printable_val_type (struct type *type, const gdb_byte *valaddr) |
| 248 | { |
| 249 | return ada_to_fixed_type (ada_aligned_type (type), valaddr, 0, NULL, 1); |
| 250 | } |
| 251 | |
| 252 | /* Print the character C on STREAM as part of the contents of a literal |
| 253 | string whose delimiter is QUOTER. TYPE_LEN is the length in bytes |
| 254 | (1 or 2) of the character. */ |
| 255 | |
| 256 | void |
| 257 | ada_emit_char (int c, struct ui_file *stream, int quoter, int type_len) |
| 258 | { |
| 259 | if (type_len != 2) |
| 260 | type_len = 1; |
| 261 | |
| 262 | c &= (1 << (type_len * TARGET_CHAR_BIT)) - 1; |
| 263 | |
| 264 | if (isascii (c) && isprint (c)) |
| 265 | { |
| 266 | if (c == quoter && c == '"') |
| 267 | fprintf_filtered (stream, "\"\""); |
| 268 | else |
| 269 | fprintf_filtered (stream, "%c", c); |
| 270 | } |
| 271 | else |
| 272 | fprintf_filtered (stream, "[\"%0*x\"]", type_len * 2, c); |
| 273 | } |
| 274 | |
| 275 | /* Character #I of STRING, given that TYPE_LEN is the size in bytes (1 |
| 276 | or 2) of a character. */ |
| 277 | |
| 278 | static int |
| 279 | char_at (const gdb_byte *string, int i, int type_len) |
| 280 | { |
| 281 | if (type_len == 1) |
| 282 | return string[i]; |
| 283 | else |
| 284 | return (int) extract_unsigned_integer (string + 2 * i, 2); |
| 285 | } |
| 286 | |
| 287 | /* Wrapper around memcpy to make it legal argument to ui_file_put */ |
| 288 | static void |
| 289 | ui_memcpy (void *dest, const char *buffer, long len) |
| 290 | { |
| 291 | memcpy (dest, buffer, (size_t) len); |
| 292 | ((char *) dest)[len] = '\0'; |
| 293 | } |
| 294 | |
| 295 | /* Print a floating-point value of type TYPE, pointed to in GDB by |
| 296 | VALADDR, on STREAM. Use Ada formatting conventions: there must be |
| 297 | a decimal point, and at least one digit before and after the |
| 298 | point. We use GNAT format for NaNs and infinities. */ |
| 299 | static void |
| 300 | ada_print_floating (const gdb_byte *valaddr, struct type *type, |
| 301 | struct ui_file *stream) |
| 302 | { |
| 303 | char buffer[64]; |
| 304 | char *s, *result; |
| 305 | int len; |
| 306 | struct ui_file *tmp_stream = mem_fileopen (); |
| 307 | struct cleanup *cleanups = make_cleanup_ui_file_delete (tmp_stream); |
| 308 | |
| 309 | print_floating (valaddr, type, tmp_stream); |
| 310 | ui_file_put (tmp_stream, ui_memcpy, buffer); |
| 311 | do_cleanups (cleanups); |
| 312 | |
| 313 | result = buffer; |
| 314 | len = strlen (result); |
| 315 | |
| 316 | /* Modify for Ada rules. */ |
| 317 | |
| 318 | s = strstr (result, "inf"); |
| 319 | if (s == NULL) |
| 320 | s = strstr (result, "Inf"); |
| 321 | if (s == NULL) |
| 322 | s = strstr (result, "INF"); |
| 323 | if (s != NULL) |
| 324 | strcpy (s, "Inf"); |
| 325 | |
| 326 | if (s == NULL) |
| 327 | { |
| 328 | s = strstr (result, "nan"); |
| 329 | if (s == NULL) |
| 330 | s = strstr (result, "NaN"); |
| 331 | if (s == NULL) |
| 332 | s = strstr (result, "Nan"); |
| 333 | if (s != NULL) |
| 334 | { |
| 335 | s[0] = s[2] = 'N'; |
| 336 | if (result[0] == '-') |
| 337 | result += 1; |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | if (s == NULL && strchr (result, '.') == NULL) |
| 342 | { |
| 343 | s = strchr (result, 'e'); |
| 344 | if (s == NULL) |
| 345 | fprintf_filtered (stream, "%s.0", result); |
| 346 | else |
| 347 | fprintf_filtered (stream, "%.*s.0%s", (int) (s-result), result, s); |
| 348 | return; |
| 349 | } |
| 350 | fprintf_filtered (stream, "%s", result); |
| 351 | } |
| 352 | |
| 353 | void |
| 354 | ada_printchar (int c, struct ui_file *stream) |
| 355 | { |
| 356 | fputs_filtered ("'", stream); |
| 357 | ada_emit_char (c, stream, '\'', 1); |
| 358 | fputs_filtered ("'", stream); |
| 359 | } |
| 360 | |
| 361 | /* [From print_type_scalar in typeprint.c]. Print VAL on STREAM in a |
| 362 | form appropriate for TYPE. */ |
| 363 | |
| 364 | void |
| 365 | ada_print_scalar (struct type *type, LONGEST val, struct ui_file *stream) |
| 366 | { |
| 367 | unsigned int i; |
| 368 | unsigned len; |
| 369 | |
| 370 | type = ada_check_typedef (type); |
| 371 | |
| 372 | switch (TYPE_CODE (type)) |
| 373 | { |
| 374 | |
| 375 | case TYPE_CODE_ENUM: |
| 376 | len = TYPE_NFIELDS (type); |
| 377 | for (i = 0; i < len; i++) |
| 378 | { |
| 379 | if (TYPE_FIELD_BITPOS (type, i) == val) |
| 380 | { |
| 381 | break; |
| 382 | } |
| 383 | } |
| 384 | if (i < len) |
| 385 | { |
| 386 | fputs_filtered (ada_enum_name (TYPE_FIELD_NAME (type, i)), stream); |
| 387 | } |
| 388 | else |
| 389 | { |
| 390 | print_longest (stream, 'd', 0, val); |
| 391 | } |
| 392 | break; |
| 393 | |
| 394 | case TYPE_CODE_INT: |
| 395 | print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, val); |
| 396 | break; |
| 397 | |
| 398 | case TYPE_CODE_CHAR: |
| 399 | LA_PRINT_CHAR ((unsigned char) val, stream); |
| 400 | break; |
| 401 | |
| 402 | case TYPE_CODE_BOOL: |
| 403 | fprintf_filtered (stream, val ? "true" : "false"); |
| 404 | break; |
| 405 | |
| 406 | case TYPE_CODE_RANGE: |
| 407 | ada_print_scalar (TYPE_TARGET_TYPE (type), val, stream); |
| 408 | return; |
| 409 | |
| 410 | case TYPE_CODE_UNDEF: |
| 411 | case TYPE_CODE_PTR: |
| 412 | case TYPE_CODE_ARRAY: |
| 413 | case TYPE_CODE_STRUCT: |
| 414 | case TYPE_CODE_UNION: |
| 415 | case TYPE_CODE_FUNC: |
| 416 | case TYPE_CODE_FLT: |
| 417 | case TYPE_CODE_VOID: |
| 418 | case TYPE_CODE_SET: |
| 419 | case TYPE_CODE_STRING: |
| 420 | case TYPE_CODE_ERROR: |
| 421 | case TYPE_CODE_MEMBERPTR: |
| 422 | case TYPE_CODE_METHODPTR: |
| 423 | case TYPE_CODE_METHOD: |
| 424 | case TYPE_CODE_REF: |
| 425 | warning (_("internal error: unhandled type in ada_print_scalar")); |
| 426 | break; |
| 427 | |
| 428 | default: |
| 429 | error (_("Invalid type code in symbol table.")); |
| 430 | } |
| 431 | gdb_flush (stream); |
| 432 | } |
| 433 | |
| 434 | /* Print the character string STRING, printing at most LENGTH characters. |
| 435 | Printing stops early if the number hits print_max; repeat counts |
| 436 | are printed as appropriate. Print ellipses at the end if we |
| 437 | had to stop before printing LENGTH characters, or if |
| 438 | FORCE_ELLIPSES. TYPE_LEN is the length (1 or 2) of the character type. |
| 439 | */ |
| 440 | |
| 441 | static void |
| 442 | printstr (struct ui_file *stream, const gdb_byte *string, |
| 443 | unsigned int length, int force_ellipses, int type_len) |
| 444 | { |
| 445 | unsigned int i; |
| 446 | unsigned int things_printed = 0; |
| 447 | int in_quotes = 0; |
| 448 | int need_comma = 0; |
| 449 | |
| 450 | if (length == 0) |
| 451 | { |
| 452 | fputs_filtered ("\"\"", stream); |
| 453 | return; |
| 454 | } |
| 455 | |
| 456 | for (i = 0; i < length && things_printed < print_max; i += 1) |
| 457 | { |
| 458 | /* Position of the character we are examining |
| 459 | to see whether it is repeated. */ |
| 460 | unsigned int rep1; |
| 461 | /* Number of repetitions we have detected so far. */ |
| 462 | unsigned int reps; |
| 463 | |
| 464 | QUIT; |
| 465 | |
| 466 | if (need_comma) |
| 467 | { |
| 468 | fputs_filtered (", ", stream); |
| 469 | need_comma = 0; |
| 470 | } |
| 471 | |
| 472 | rep1 = i + 1; |
| 473 | reps = 1; |
| 474 | while (rep1 < length |
| 475 | && char_at (string, rep1, type_len) == char_at (string, i, |
| 476 | type_len)) |
| 477 | { |
| 478 | rep1 += 1; |
| 479 | reps += 1; |
| 480 | } |
| 481 | |
| 482 | if (reps > repeat_count_threshold) |
| 483 | { |
| 484 | if (in_quotes) |
| 485 | { |
| 486 | if (inspect_it) |
| 487 | fputs_filtered ("\\\", ", stream); |
| 488 | else |
| 489 | fputs_filtered ("\", ", stream); |
| 490 | in_quotes = 0; |
| 491 | } |
| 492 | fputs_filtered ("'", stream); |
| 493 | ada_emit_char (char_at (string, i, type_len), stream, '\'', |
| 494 | type_len); |
| 495 | fputs_filtered ("'", stream); |
| 496 | fprintf_filtered (stream, _(" <repeats %u times>"), reps); |
| 497 | i = rep1 - 1; |
| 498 | things_printed += repeat_count_threshold; |
| 499 | need_comma = 1; |
| 500 | } |
| 501 | else |
| 502 | { |
| 503 | if (!in_quotes) |
| 504 | { |
| 505 | if (inspect_it) |
| 506 | fputs_filtered ("\\\"", stream); |
| 507 | else |
| 508 | fputs_filtered ("\"", stream); |
| 509 | in_quotes = 1; |
| 510 | } |
| 511 | ada_emit_char (char_at (string, i, type_len), stream, '"', |
| 512 | type_len); |
| 513 | things_printed += 1; |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | /* Terminate the quotes if necessary. */ |
| 518 | if (in_quotes) |
| 519 | { |
| 520 | if (inspect_it) |
| 521 | fputs_filtered ("\\\"", stream); |
| 522 | else |
| 523 | fputs_filtered ("\"", stream); |
| 524 | } |
| 525 | |
| 526 | if (force_ellipses || i < length) |
| 527 | fputs_filtered ("...", stream); |
| 528 | } |
| 529 | |
| 530 | void |
| 531 | ada_printstr (struct ui_file *stream, const gdb_byte *string, |
| 532 | unsigned int length, int width, int force_ellipses) |
| 533 | { |
| 534 | printstr (stream, string, length, force_ellipses, width); |
| 535 | } |
| 536 | |
| 537 | |
| 538 | /* Print data of type TYPE located at VALADDR (within GDB), which came from |
| 539 | the inferior at address ADDRESS, onto stdio stream STREAM according to |
| 540 | FORMAT (a letter as for the printf % codes or 0 for natural format). |
| 541 | The data at VALADDR is in target byte order. |
| 542 | |
| 543 | If the data is printed as a string, returns the number of string characters |
| 544 | printed. |
| 545 | |
| 546 | If DEREF_REF is nonzero, then dereference references, otherwise just print |
| 547 | them like pointers. |
| 548 | |
| 549 | RECURSE indicates the amount of indentation to supply before |
| 550 | continuation lines; this amount is roughly twice the value of RECURSE. |
| 551 | |
| 552 | When PRETTY is non-zero, prints record fields on separate lines. |
| 553 | (For some reason, the current version of gdb instead uses a global |
| 554 | variable---prettyprint_arrays--- to causes a similar effect on |
| 555 | arrays.) */ |
| 556 | |
| 557 | int |
| 558 | ada_val_print (struct type *type, const gdb_byte *valaddr0, |
| 559 | int embedded_offset, CORE_ADDR address, |
| 560 | struct ui_file *stream, int format, int deref_ref, |
| 561 | int recurse, enum val_prettyprint pretty) |
| 562 | { |
| 563 | struct ada_val_print_args args; |
| 564 | args.type = type; |
| 565 | args.valaddr0 = valaddr0; |
| 566 | args.embedded_offset = embedded_offset; |
| 567 | args.address = address; |
| 568 | args.stream = stream; |
| 569 | args.format = format; |
| 570 | args.deref_ref = deref_ref; |
| 571 | args.recurse = recurse; |
| 572 | args.pretty = pretty; |
| 573 | |
| 574 | return catch_errors (ada_val_print_stub, &args, NULL, RETURN_MASK_ALL); |
| 575 | } |
| 576 | |
| 577 | /* Helper for ada_val_print; used as argument to catch_errors to |
| 578 | unmarshal the arguments to ada_val_print_1, which does the work. */ |
| 579 | static int |
| 580 | ada_val_print_stub (void *args0) |
| 581 | { |
| 582 | struct ada_val_print_args *argsp = (struct ada_val_print_args *) args0; |
| 583 | return ada_val_print_1 (argsp->type, argsp->valaddr0, |
| 584 | argsp->embedded_offset, argsp->address, |
| 585 | argsp->stream, argsp->format, argsp->deref_ref, |
| 586 | argsp->recurse, argsp->pretty); |
| 587 | } |
| 588 | |
| 589 | /* See the comment on ada_val_print. This function differs in that it |
| 590 | * does not catch evaluation errors (leaving that to ada_val_print). */ |
| 591 | |
| 592 | static int |
| 593 | ada_val_print_1 (struct type *type, const gdb_byte *valaddr0, |
| 594 | int embedded_offset, CORE_ADDR address, |
| 595 | struct ui_file *stream, int format, |
| 596 | int deref_ref, int recurse, enum val_prettyprint pretty) |
| 597 | { |
| 598 | unsigned int len; |
| 599 | int i; |
| 600 | struct type *elttype; |
| 601 | unsigned int eltlen; |
| 602 | LONGEST val; |
| 603 | const gdb_byte *valaddr = valaddr0 + embedded_offset; |
| 604 | |
| 605 | type = ada_check_typedef (type); |
| 606 | |
| 607 | if (ada_is_array_descriptor_type (type) || ada_is_packed_array_type (type)) |
| 608 | { |
| 609 | int retn; |
| 610 | struct value *mark = value_mark (); |
| 611 | struct value *val; |
| 612 | val = value_from_contents_and_address (type, valaddr, address); |
| 613 | val = ada_coerce_to_simple_array_ptr (val); |
| 614 | if (val == NULL) |
| 615 | { |
| 616 | fprintf_filtered (stream, "(null)"); |
| 617 | retn = 0; |
| 618 | } |
| 619 | else |
| 620 | retn = ada_val_print_1 (value_type (val), value_contents (val), 0, |
| 621 | VALUE_ADDRESS (val), stream, format, |
| 622 | deref_ref, recurse, pretty); |
| 623 | value_free_to_mark (mark); |
| 624 | return retn; |
| 625 | } |
| 626 | |
| 627 | valaddr = ada_aligned_value_addr (type, valaddr); |
| 628 | embedded_offset -= valaddr - valaddr0 - embedded_offset; |
| 629 | type = printable_val_type (type, valaddr); |
| 630 | |
| 631 | switch (TYPE_CODE (type)) |
| 632 | { |
| 633 | default: |
| 634 | return c_val_print (type, valaddr0, embedded_offset, address, stream, |
| 635 | format, deref_ref, recurse, pretty); |
| 636 | |
| 637 | case TYPE_CODE_PTR: |
| 638 | { |
| 639 | int ret = c_val_print (type, valaddr0, embedded_offset, address, |
| 640 | stream, format, deref_ref, recurse, pretty); |
| 641 | if (ada_is_tag_type (type)) |
| 642 | { |
| 643 | struct value *val = |
| 644 | value_from_contents_and_address (type, valaddr, address); |
| 645 | const char *name = ada_tag_name (val); |
| 646 | if (name != NULL) |
| 647 | fprintf_filtered (stream, " (%s)", name); |
| 648 | return 0; |
| 649 | } |
| 650 | return ret; |
| 651 | } |
| 652 | |
| 653 | case TYPE_CODE_INT: |
| 654 | case TYPE_CODE_RANGE: |
| 655 | if (ada_is_fixed_point_type (type)) |
| 656 | { |
| 657 | LONGEST v = unpack_long (type, valaddr); |
| 658 | int len = TYPE_LENGTH (type); |
| 659 | |
| 660 | fprintf_filtered (stream, len < 4 ? "%.11g" : "%.17g", |
| 661 | (double) ada_fixed_to_float (type, v)); |
| 662 | return 0; |
| 663 | } |
| 664 | else if (ada_is_vax_floating_type (type)) |
| 665 | { |
| 666 | struct value *val = |
| 667 | value_from_contents_and_address (type, valaddr, address); |
| 668 | struct value *func = ada_vax_float_print_function (type); |
| 669 | if (func != 0) |
| 670 | { |
| 671 | static struct type *parray_of_char = NULL; |
| 672 | struct value *printable_val; |
| 673 | |
| 674 | if (parray_of_char == NULL) |
| 675 | parray_of_char = |
| 676 | make_pointer_type |
| 677 | (create_array_type |
| 678 | (NULL, builtin_type_char, |
| 679 | create_range_type (NULL, builtin_type_int, 0, 32)), NULL); |
| 680 | |
| 681 | printable_val = |
| 682 | value_ind (value_cast (parray_of_char, |
| 683 | call_function_by_hand (func, 1, |
| 684 | &val))); |
| 685 | |
| 686 | fprintf_filtered (stream, "%s", value_contents (printable_val)); |
| 687 | return 0; |
| 688 | } |
| 689 | /* No special printing function. Do as best we can. */ |
| 690 | } |
| 691 | else if (TYPE_CODE (type) == TYPE_CODE_RANGE) |
| 692 | { |
| 693 | struct type *target_type = TYPE_TARGET_TYPE (type); |
| 694 | if (TYPE_LENGTH (type) != TYPE_LENGTH (target_type)) |
| 695 | { |
| 696 | /* Obscure case of range type that has different length from |
| 697 | its base type. Perform a conversion, or we will get a |
| 698 | nonsense value. Actually, we could use the same |
| 699 | code regardless of lengths; I'm just avoiding a cast. */ |
| 700 | struct value *v = value_cast (target_type, |
| 701 | value_from_contents_and_address |
| 702 | (type, valaddr, 0)); |
| 703 | return ada_val_print_1 (target_type, value_contents (v), 0, 0, |
| 704 | stream, format, 0, recurse + 1, pretty); |
| 705 | } |
| 706 | else |
| 707 | return ada_val_print_1 (TYPE_TARGET_TYPE (type), |
| 708 | valaddr0, embedded_offset, |
| 709 | address, stream, format, deref_ref, |
| 710 | recurse, pretty); |
| 711 | } |
| 712 | else |
| 713 | { |
| 714 | format = format ? format : output_format; |
| 715 | if (format) |
| 716 | { |
| 717 | print_scalar_formatted (valaddr, type, format, 0, stream); |
| 718 | } |
| 719 | else if (ada_is_system_address_type (type)) |
| 720 | { |
| 721 | /* FIXME: We want to print System.Address variables using |
| 722 | the same format as for any access type. But for some |
| 723 | reason GNAT encodes the System.Address type as an int, |
| 724 | so we have to work-around this deficiency by handling |
| 725 | System.Address values as a special case. */ |
| 726 | fprintf_filtered (stream, "("); |
| 727 | type_print (type, "", stream, -1); |
| 728 | fprintf_filtered (stream, ") "); |
| 729 | fputs_filtered (paddress (extract_typed_address |
| 730 | (valaddr, builtin_type_void_data_ptr)), |
| 731 | stream); |
| 732 | } |
| 733 | else |
| 734 | { |
| 735 | val_print_type_code_int (type, valaddr, stream); |
| 736 | if (ada_is_character_type (type)) |
| 737 | { |
| 738 | fputs_filtered (" ", stream); |
| 739 | ada_printchar ((unsigned char) unpack_long (type, valaddr), |
| 740 | stream); |
| 741 | } |
| 742 | } |
| 743 | return 0; |
| 744 | } |
| 745 | |
| 746 | case TYPE_CODE_ENUM: |
| 747 | if (format) |
| 748 | { |
| 749 | print_scalar_formatted (valaddr, type, format, 0, stream); |
| 750 | break; |
| 751 | } |
| 752 | len = TYPE_NFIELDS (type); |
| 753 | val = unpack_long (type, valaddr); |
| 754 | for (i = 0; i < len; i++) |
| 755 | { |
| 756 | QUIT; |
| 757 | if (val == TYPE_FIELD_BITPOS (type, i)) |
| 758 | { |
| 759 | break; |
| 760 | } |
| 761 | } |
| 762 | if (i < len) |
| 763 | { |
| 764 | const char *name = ada_enum_name (TYPE_FIELD_NAME (type, i)); |
| 765 | if (name[0] == '\'') |
| 766 | fprintf_filtered (stream, "%ld %s", (long) val, name); |
| 767 | else |
| 768 | fputs_filtered (name, stream); |
| 769 | } |
| 770 | else |
| 771 | { |
| 772 | print_longest (stream, 'd', 0, val); |
| 773 | } |
| 774 | break; |
| 775 | |
| 776 | case TYPE_CODE_FLAGS: |
| 777 | if (format) |
| 778 | print_scalar_formatted (valaddr, type, format, 0, stream); |
| 779 | else |
| 780 | val_print_type_code_flags (type, valaddr, stream); |
| 781 | break; |
| 782 | |
| 783 | case TYPE_CODE_FLT: |
| 784 | if (format) |
| 785 | return c_val_print (type, valaddr0, embedded_offset, address, stream, |
| 786 | format, deref_ref, recurse, pretty); |
| 787 | else |
| 788 | ada_print_floating (valaddr0 + embedded_offset, type, stream); |
| 789 | break; |
| 790 | |
| 791 | case TYPE_CODE_UNION: |
| 792 | case TYPE_CODE_STRUCT: |
| 793 | if (ada_is_bogus_array_descriptor (type)) |
| 794 | { |
| 795 | fprintf_filtered (stream, "(...?)"); |
| 796 | return 0; |
| 797 | } |
| 798 | else |
| 799 | { |
| 800 | print_record (type, valaddr, stream, format, recurse, pretty); |
| 801 | return 0; |
| 802 | } |
| 803 | |
| 804 | case TYPE_CODE_ARRAY: |
| 805 | elttype = TYPE_TARGET_TYPE (type); |
| 806 | if (elttype == NULL) |
| 807 | eltlen = 0; |
| 808 | else |
| 809 | eltlen = TYPE_LENGTH (elttype); |
| 810 | /* FIXME: This doesn't deal with non-empty arrays of |
| 811 | 0-length items (not a typical case!) */ |
| 812 | if (eltlen == 0) |
| 813 | len = 0; |
| 814 | else |
| 815 | len = TYPE_LENGTH (type) / eltlen; |
| 816 | |
| 817 | /* For an array of chars, print with string syntax. */ |
| 818 | if (ada_is_string_type (type) && (format == 0 || format == 's')) |
| 819 | { |
| 820 | if (prettyprint_arrays) |
| 821 | { |
| 822 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 823 | } |
| 824 | /* If requested, look for the first null char and only print |
| 825 | elements up to it. */ |
| 826 | if (stop_print_at_null) |
| 827 | { |
| 828 | int temp_len; |
| 829 | |
| 830 | /* Look for a NULL char. */ |
| 831 | for (temp_len = 0; |
| 832 | temp_len < len && temp_len < print_max |
| 833 | && char_at (valaddr, temp_len, eltlen) != 0; |
| 834 | temp_len += 1); |
| 835 | len = temp_len; |
| 836 | } |
| 837 | |
| 838 | printstr (stream, valaddr, len, 0, eltlen); |
| 839 | } |
| 840 | else |
| 841 | { |
| 842 | len = 0; |
| 843 | fprintf_filtered (stream, "("); |
| 844 | print_optional_low_bound (stream, type); |
| 845 | if (TYPE_FIELD_BITSIZE (type, 0) > 0) |
| 846 | val_print_packed_array_elements (type, valaddr, 0, stream, |
| 847 | format, recurse, pretty); |
| 848 | else |
| 849 | val_print_array_elements (type, valaddr, address, stream, |
| 850 | format, deref_ref, recurse, |
| 851 | pretty, 0); |
| 852 | fprintf_filtered (stream, ")"); |
| 853 | } |
| 854 | gdb_flush (stream); |
| 855 | return len; |
| 856 | |
| 857 | case TYPE_CODE_REF: |
| 858 | /* For references, the debugger is expected to print the value as |
| 859 | an address if DEREF_REF is null. But printing an address in place |
| 860 | of the object value would be confusing to an Ada programmer. |
| 861 | So, for Ada values, we print the actual dereferenced value |
| 862 | regardless. */ |
| 863 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 864 | |
| 865 | if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF) |
| 866 | { |
| 867 | LONGEST deref_val_int = (LONGEST) |
| 868 | unpack_pointer (lookup_pointer_type (builtin_type_void), |
| 869 | valaddr); |
| 870 | if (deref_val_int != 0) |
| 871 | { |
| 872 | struct value *deref_val = |
| 873 | ada_value_ind (value_from_longest |
| 874 | (lookup_pointer_type (elttype), |
| 875 | deref_val_int)); |
| 876 | val_print (value_type (deref_val), |
| 877 | value_contents (deref_val), 0, |
| 878 | VALUE_ADDRESS (deref_val), stream, format, |
| 879 | deref_ref, recurse + 1, pretty); |
| 880 | } |
| 881 | else |
| 882 | fputs_filtered ("(null)", stream); |
| 883 | } |
| 884 | else |
| 885 | fputs_filtered ("???", stream); |
| 886 | |
| 887 | break; |
| 888 | } |
| 889 | gdb_flush (stream); |
| 890 | return 0; |
| 891 | } |
| 892 | |
| 893 | static int |
| 894 | print_variant_part (struct type *type, int field_num, const gdb_byte *valaddr, |
| 895 | struct ui_file *stream, int format, int recurse, |
| 896 | enum val_prettyprint pretty, int comma_needed, |
| 897 | struct type *outer_type, const gdb_byte *outer_valaddr) |
| 898 | { |
| 899 | struct type *var_type = TYPE_FIELD_TYPE (type, field_num); |
| 900 | int which = ada_which_variant_applies (var_type, outer_type, outer_valaddr); |
| 901 | |
| 902 | if (which < 0) |
| 903 | return 0; |
| 904 | else |
| 905 | return print_field_values |
| 906 | (TYPE_FIELD_TYPE (var_type, which), |
| 907 | valaddr + TYPE_FIELD_BITPOS (type, field_num) / HOST_CHAR_BIT |
| 908 | + TYPE_FIELD_BITPOS (var_type, which) / HOST_CHAR_BIT, |
| 909 | stream, format, recurse, pretty, |
| 910 | comma_needed, outer_type, outer_valaddr); |
| 911 | } |
| 912 | |
| 913 | int |
| 914 | ada_value_print (struct value *val0, struct ui_file *stream, int format, |
| 915 | enum val_prettyprint pretty) |
| 916 | { |
| 917 | const gdb_byte *valaddr = value_contents (val0); |
| 918 | CORE_ADDR address = VALUE_ADDRESS (val0) + value_offset (val0); |
| 919 | struct type *type = |
| 920 | ada_to_fixed_type (value_type (val0), valaddr, address, NULL, 1); |
| 921 | struct value *val = |
| 922 | value_from_contents_and_address (type, valaddr, address); |
| 923 | |
| 924 | /* If it is a pointer, indicate what it points to. */ |
| 925 | if (TYPE_CODE (type) == TYPE_CODE_PTR) |
| 926 | { |
| 927 | /* Hack: don't print (char *) for char strings. Their |
| 928 | type is indicated by the quoted string anyway. */ |
| 929 | if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) != sizeof (char) |
| 930 | || TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_INT |
| 931 | || TYPE_UNSIGNED (TYPE_TARGET_TYPE (type))) |
| 932 | { |
| 933 | fprintf_filtered (stream, "("); |
| 934 | type_print (type, "", stream, -1); |
| 935 | fprintf_filtered (stream, ") "); |
| 936 | } |
| 937 | } |
| 938 | else if (ada_is_array_descriptor_type (type)) |
| 939 | { |
| 940 | fprintf_filtered (stream, "("); |
| 941 | type_print (type, "", stream, -1); |
| 942 | fprintf_filtered (stream, ") "); |
| 943 | } |
| 944 | else if (ada_is_bogus_array_descriptor (type)) |
| 945 | { |
| 946 | fprintf_filtered (stream, "("); |
| 947 | type_print (type, "", stream, -1); |
| 948 | fprintf_filtered (stream, ") (...?)"); |
| 949 | return 0; |
| 950 | } |
| 951 | |
| 952 | if (TYPE_CODE (type) == TYPE_CODE_ARRAY |
| 953 | && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) == 0 |
| 954 | && TYPE_CODE (TYPE_INDEX_TYPE (type)) == TYPE_CODE_RANGE) |
| 955 | { |
| 956 | /* This is an array of zero-length elements, that is an array |
| 957 | of null records. This array needs to be printed by hand, |
| 958 | as the standard routine to print arrays relies on the size of |
| 959 | the array elements to be nonzero. This is because it computes |
| 960 | the number of elements in the array by dividing the array size |
| 961 | by the array element size. */ |
| 962 | fprintf_filtered (stream, "(%d .. %d => ())", |
| 963 | TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), |
| 964 | TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (type))); |
| 965 | return 0; |
| 966 | } |
| 967 | |
| 968 | return (val_print (type, value_contents (val), 0, address, |
| 969 | stream, format, 1, 0, pretty)); |
| 970 | } |
| 971 | |
| 972 | static void |
| 973 | print_record (struct type *type, const gdb_byte *valaddr, |
| 974 | struct ui_file *stream, int format, int recurse, |
| 975 | enum val_prettyprint pretty) |
| 976 | { |
| 977 | type = ada_check_typedef (type); |
| 978 | |
| 979 | fprintf_filtered (stream, "("); |
| 980 | |
| 981 | if (print_field_values (type, valaddr, stream, format, recurse, pretty, |
| 982 | 0, type, valaddr) != 0 && pretty) |
| 983 | { |
| 984 | fprintf_filtered (stream, "\n"); |
| 985 | print_spaces_filtered (2 * recurse, stream); |
| 986 | } |
| 987 | |
| 988 | fprintf_filtered (stream, ")"); |
| 989 | } |
| 990 | |
| 991 | /* Print out fields of value at VALADDR having structure type TYPE. |
| 992 | |
| 993 | TYPE, VALADDR, STREAM, FORMAT, RECURSE, and PRETTY have the |
| 994 | same meanings as in ada_print_value and ada_val_print. |
| 995 | |
| 996 | OUTER_TYPE and OUTER_VALADDR give type and address of enclosing record |
| 997 | (used to get discriminant values when printing variant parts). |
| 998 | |
| 999 | COMMA_NEEDED is 1 if fields have been printed at the current recursion |
| 1000 | level, so that a comma is needed before any field printed by this |
| 1001 | call. |
| 1002 | |
| 1003 | Returns 1 if COMMA_NEEDED or any fields were printed. */ |
| 1004 | |
| 1005 | static int |
| 1006 | print_field_values (struct type *type, const gdb_byte *valaddr, |
| 1007 | struct ui_file *stream, int format, int recurse, |
| 1008 | enum val_prettyprint pretty, int comma_needed, |
| 1009 | struct type *outer_type, const gdb_byte *outer_valaddr) |
| 1010 | { |
| 1011 | int i, len; |
| 1012 | |
| 1013 | len = TYPE_NFIELDS (type); |
| 1014 | |
| 1015 | for (i = 0; i < len; i += 1) |
| 1016 | { |
| 1017 | if (ada_is_ignored_field (type, i)) |
| 1018 | continue; |
| 1019 | |
| 1020 | if (ada_is_wrapper_field (type, i)) |
| 1021 | { |
| 1022 | comma_needed = |
| 1023 | print_field_values (TYPE_FIELD_TYPE (type, i), |
| 1024 | valaddr |
| 1025 | + TYPE_FIELD_BITPOS (type, i) / HOST_CHAR_BIT, |
| 1026 | stream, format, recurse, pretty, |
| 1027 | comma_needed, type, valaddr); |
| 1028 | continue; |
| 1029 | } |
| 1030 | else if (ada_is_variant_part (type, i)) |
| 1031 | { |
| 1032 | comma_needed = |
| 1033 | print_variant_part (type, i, valaddr, |
| 1034 | stream, format, recurse, pretty, comma_needed, |
| 1035 | outer_type, outer_valaddr); |
| 1036 | continue; |
| 1037 | } |
| 1038 | |
| 1039 | if (comma_needed) |
| 1040 | fprintf_filtered (stream, ", "); |
| 1041 | comma_needed = 1; |
| 1042 | |
| 1043 | if (pretty) |
| 1044 | { |
| 1045 | fprintf_filtered (stream, "\n"); |
| 1046 | print_spaces_filtered (2 + 2 * recurse, stream); |
| 1047 | } |
| 1048 | else |
| 1049 | { |
| 1050 | wrap_here (n_spaces (2 + 2 * recurse)); |
| 1051 | } |
| 1052 | if (inspect_it) |
| 1053 | { |
| 1054 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR) |
| 1055 | fputs_filtered ("\"( ptr \"", stream); |
| 1056 | else |
| 1057 | fputs_filtered ("\"( nodef \"", stream); |
| 1058 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), |
| 1059 | language_cplus, DMGL_NO_OPTS); |
| 1060 | fputs_filtered ("\" \"", stream); |
| 1061 | fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), |
| 1062 | language_cplus, DMGL_NO_OPTS); |
| 1063 | fputs_filtered ("\") \"", stream); |
| 1064 | } |
| 1065 | else |
| 1066 | { |
| 1067 | annotate_field_begin (TYPE_FIELD_TYPE (type, i)); |
| 1068 | fprintf_filtered (stream, "%.*s", |
| 1069 | ada_name_prefix_len (TYPE_FIELD_NAME (type, i)), |
| 1070 | TYPE_FIELD_NAME (type, i)); |
| 1071 | annotate_field_name_end (); |
| 1072 | fputs_filtered (" => ", stream); |
| 1073 | annotate_field_value (); |
| 1074 | } |
| 1075 | |
| 1076 | if (TYPE_FIELD_PACKED (type, i)) |
| 1077 | { |
| 1078 | struct value *v; |
| 1079 | |
| 1080 | /* Bitfields require special handling, especially due to byte |
| 1081 | order problems. */ |
| 1082 | if (TYPE_CPLUS_SPECIFIC (type) != NULL |
| 1083 | && TYPE_FIELD_IGNORE (type, i)) |
| 1084 | { |
| 1085 | fputs_filtered (_("<optimized out or zero length>"), stream); |
| 1086 | } |
| 1087 | else |
| 1088 | { |
| 1089 | int bit_pos = TYPE_FIELD_BITPOS (type, i); |
| 1090 | int bit_size = TYPE_FIELD_BITSIZE (type, i); |
| 1091 | |
| 1092 | adjust_type_signedness (TYPE_FIELD_TYPE (type, i)); |
| 1093 | v = ada_value_primitive_packed_val (NULL, valaddr, |
| 1094 | bit_pos / HOST_CHAR_BIT, |
| 1095 | bit_pos % HOST_CHAR_BIT, |
| 1096 | bit_size, |
| 1097 | TYPE_FIELD_TYPE (type, i)); |
| 1098 | val_print (TYPE_FIELD_TYPE (type, i), value_contents (v), 0, 0, |
| 1099 | stream, format, 0, recurse + 1, pretty); |
| 1100 | } |
| 1101 | } |
| 1102 | else |
| 1103 | ada_val_print (TYPE_FIELD_TYPE (type, i), |
| 1104 | valaddr + TYPE_FIELD_BITPOS (type, i) / HOST_CHAR_BIT, |
| 1105 | 0, 0, stream, format, 0, recurse + 1, pretty); |
| 1106 | annotate_field_end (); |
| 1107 | } |
| 1108 | |
| 1109 | return comma_needed; |
| 1110 | } |