| 1 | /* Support for printing Fortran values for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 1993-2014 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by Motorola. Adapted from the C definitions by Farooq Butt |
| 6 | (fmbutt@engage.sps.mot.com), additionally worked over by Stan Shebs. |
| 7 | |
| 8 | This file is part of GDB. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 22 | |
| 23 | #include "defs.h" |
| 24 | #include <string.h> |
| 25 | #include "symtab.h" |
| 26 | #include "gdbtypes.h" |
| 27 | #include "expression.h" |
| 28 | #include "value.h" |
| 29 | #include "valprint.h" |
| 30 | #include "language.h" |
| 31 | #include "f-lang.h" |
| 32 | #include "frame.h" |
| 33 | #include "gdbcore.h" |
| 34 | #include "command.h" |
| 35 | #include "block.h" |
| 36 | #include "dictionary.h" |
| 37 | #include "gdb_assert.h" |
| 38 | #include "exceptions.h" |
| 39 | |
| 40 | extern void _initialize_f_valprint (void); |
| 41 | static void info_common_command (char *, int); |
| 42 | static void f77_create_arrayprint_offset_tbl (struct type *, |
| 43 | struct ui_file *); |
| 44 | static void f77_get_dynamic_length_of_aggregate (struct type *); |
| 45 | |
| 46 | int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2]; |
| 47 | |
| 48 | /* Array which holds offsets to be applied to get a row's elements |
| 49 | for a given array. Array also holds the size of each subarray. */ |
| 50 | |
| 51 | /* The following macro gives us the size of the nth dimension, Where |
| 52 | n is 1 based. */ |
| 53 | |
| 54 | #define F77_DIM_SIZE(n) (f77_array_offset_tbl[n][1]) |
| 55 | |
| 56 | /* The following gives us the offset for row n where n is 1-based. */ |
| 57 | |
| 58 | #define F77_DIM_OFFSET(n) (f77_array_offset_tbl[n][0]) |
| 59 | |
| 60 | int |
| 61 | f77_get_lowerbound (struct type *type) |
| 62 | { |
| 63 | if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type)) |
| 64 | error (_("Lower bound may not be '*' in F77")); |
| 65 | |
| 66 | return TYPE_ARRAY_LOWER_BOUND_VALUE (type); |
| 67 | } |
| 68 | |
| 69 | int |
| 70 | f77_get_upperbound (struct type *type) |
| 71 | { |
| 72 | if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
| 73 | { |
| 74 | /* We have an assumed size array on our hands. Assume that |
| 75 | upper_bound == lower_bound so that we show at least 1 element. |
| 76 | If the user wants to see more elements, let him manually ask for 'em |
| 77 | and we'll subscript the array and show him. */ |
| 78 | |
| 79 | return f77_get_lowerbound (type); |
| 80 | } |
| 81 | |
| 82 | return TYPE_ARRAY_UPPER_BOUND_VALUE (type); |
| 83 | } |
| 84 | |
| 85 | /* Obtain F77 adjustable array dimensions. */ |
| 86 | |
| 87 | static void |
| 88 | f77_get_dynamic_length_of_aggregate (struct type *type) |
| 89 | { |
| 90 | int upper_bound = -1; |
| 91 | int lower_bound = 1; |
| 92 | |
| 93 | /* Recursively go all the way down into a possibly multi-dimensional |
| 94 | F77 array and get the bounds. For simple arrays, this is pretty |
| 95 | easy but when the bounds are dynamic, we must be very careful |
| 96 | to add up all the lengths correctly. Not doing this right |
| 97 | will lead to horrendous-looking arrays in parameter lists. |
| 98 | |
| 99 | This function also works for strings which behave very |
| 100 | similarly to arrays. */ |
| 101 | |
| 102 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY |
| 103 | || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING) |
| 104 | f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type)); |
| 105 | |
| 106 | /* Recursion ends here, start setting up lengths. */ |
| 107 | lower_bound = f77_get_lowerbound (type); |
| 108 | upper_bound = f77_get_upperbound (type); |
| 109 | |
| 110 | /* Patch in a valid length value. */ |
| 111 | |
| 112 | TYPE_LENGTH (type) = |
| 113 | (upper_bound - lower_bound + 1) |
| 114 | * TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type))); |
| 115 | } |
| 116 | |
| 117 | /* Function that sets up the array offset,size table for the array |
| 118 | type "type". */ |
| 119 | |
| 120 | static void |
| 121 | f77_create_arrayprint_offset_tbl (struct type *type, struct ui_file *stream) |
| 122 | { |
| 123 | struct type *tmp_type; |
| 124 | int eltlen; |
| 125 | int ndimen = 1; |
| 126 | int upper, lower; |
| 127 | |
| 128 | tmp_type = type; |
| 129 | |
| 130 | while (TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY) |
| 131 | { |
| 132 | upper = f77_get_upperbound (tmp_type); |
| 133 | lower = f77_get_lowerbound (tmp_type); |
| 134 | |
| 135 | F77_DIM_SIZE (ndimen) = upper - lower + 1; |
| 136 | |
| 137 | tmp_type = TYPE_TARGET_TYPE (tmp_type); |
| 138 | ndimen++; |
| 139 | } |
| 140 | |
| 141 | /* Now we multiply eltlen by all the offsets, so that later we |
| 142 | can print out array elements correctly. Up till now we |
| 143 | know an offset to apply to get the item but we also |
| 144 | have to know how much to add to get to the next item. */ |
| 145 | |
| 146 | ndimen--; |
| 147 | eltlen = TYPE_LENGTH (tmp_type); |
| 148 | F77_DIM_OFFSET (ndimen) = eltlen; |
| 149 | while (--ndimen > 0) |
| 150 | { |
| 151 | eltlen *= F77_DIM_SIZE (ndimen + 1); |
| 152 | F77_DIM_OFFSET (ndimen) = eltlen; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | |
| 157 | |
| 158 | /* Actual function which prints out F77 arrays, Valaddr == address in |
| 159 | the superior. Address == the address in the inferior. */ |
| 160 | |
| 161 | static void |
| 162 | f77_print_array_1 (int nss, int ndimensions, struct type *type, |
| 163 | const gdb_byte *valaddr, |
| 164 | int embedded_offset, CORE_ADDR address, |
| 165 | struct ui_file *stream, int recurse, |
| 166 | const struct value *val, |
| 167 | const struct value_print_options *options, |
| 168 | int *elts) |
| 169 | { |
| 170 | int i; |
| 171 | |
| 172 | if (nss != ndimensions) |
| 173 | { |
| 174 | for (i = 0; |
| 175 | (i < F77_DIM_SIZE (nss) && (*elts) < options->print_max); |
| 176 | i++) |
| 177 | { |
| 178 | fprintf_filtered (stream, "( "); |
| 179 | f77_print_array_1 (nss + 1, ndimensions, TYPE_TARGET_TYPE (type), |
| 180 | valaddr, |
| 181 | embedded_offset + i * F77_DIM_OFFSET (nss), |
| 182 | address, |
| 183 | stream, recurse, val, options, elts); |
| 184 | fprintf_filtered (stream, ") "); |
| 185 | } |
| 186 | if (*elts >= options->print_max && i < F77_DIM_SIZE (nss)) |
| 187 | fprintf_filtered (stream, "..."); |
| 188 | } |
| 189 | else |
| 190 | { |
| 191 | for (i = 0; i < F77_DIM_SIZE (nss) && (*elts) < options->print_max; |
| 192 | i++, (*elts)++) |
| 193 | { |
| 194 | val_print (TYPE_TARGET_TYPE (type), |
| 195 | valaddr, |
| 196 | embedded_offset + i * F77_DIM_OFFSET (ndimensions), |
| 197 | address, stream, recurse, |
| 198 | val, options, current_language); |
| 199 | |
| 200 | if (i != (F77_DIM_SIZE (nss) - 1)) |
| 201 | fprintf_filtered (stream, ", "); |
| 202 | |
| 203 | if ((*elts == options->print_max - 1) |
| 204 | && (i != (F77_DIM_SIZE (nss) - 1))) |
| 205 | fprintf_filtered (stream, "..."); |
| 206 | } |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | /* This function gets called to print an F77 array, we set up some |
| 211 | stuff and then immediately call f77_print_array_1(). */ |
| 212 | |
| 213 | static void |
| 214 | f77_print_array (struct type *type, const gdb_byte *valaddr, |
| 215 | int embedded_offset, |
| 216 | CORE_ADDR address, struct ui_file *stream, |
| 217 | int recurse, |
| 218 | const struct value *val, |
| 219 | const struct value_print_options *options) |
| 220 | { |
| 221 | int ndimensions; |
| 222 | int elts = 0; |
| 223 | |
| 224 | ndimensions = calc_f77_array_dims (type); |
| 225 | |
| 226 | if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0) |
| 227 | error (_("\ |
| 228 | Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"), |
| 229 | ndimensions, MAX_FORTRAN_DIMS); |
| 230 | |
| 231 | /* Since F77 arrays are stored column-major, we set up an |
| 232 | offset table to get at the various row's elements. The |
| 233 | offset table contains entries for both offset and subarray size. */ |
| 234 | |
| 235 | f77_create_arrayprint_offset_tbl (type, stream); |
| 236 | |
| 237 | f77_print_array_1 (1, ndimensions, type, valaddr, embedded_offset, |
| 238 | address, stream, recurse, val, options, &elts); |
| 239 | } |
| 240 | \f |
| 241 | |
| 242 | /* Decorations for Fortran. */ |
| 243 | |
| 244 | static const struct generic_val_print_decorations f_decorations = |
| 245 | { |
| 246 | "(", |
| 247 | ",", |
| 248 | ")", |
| 249 | ".TRUE.", |
| 250 | ".FALSE.", |
| 251 | "VOID", |
| 252 | }; |
| 253 | |
| 254 | /* See val_print for a description of the various parameters of this |
| 255 | function; they are identical. */ |
| 256 | |
| 257 | void |
| 258 | f_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset, |
| 259 | CORE_ADDR address, struct ui_file *stream, int recurse, |
| 260 | const struct value *original_value, |
| 261 | const struct value_print_options *options) |
| 262 | { |
| 263 | struct gdbarch *gdbarch = get_type_arch (type); |
| 264 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 265 | unsigned int i = 0; /* Number of characters printed. */ |
| 266 | struct type *elttype; |
| 267 | CORE_ADDR addr; |
| 268 | int index; |
| 269 | |
| 270 | CHECK_TYPEDEF (type); |
| 271 | switch (TYPE_CODE (type)) |
| 272 | { |
| 273 | case TYPE_CODE_STRING: |
| 274 | f77_get_dynamic_length_of_aggregate (type); |
| 275 | LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char, |
| 276 | valaddr + embedded_offset, |
| 277 | TYPE_LENGTH (type), NULL, 0, options); |
| 278 | break; |
| 279 | |
| 280 | case TYPE_CODE_ARRAY: |
| 281 | if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_CHAR) |
| 282 | { |
| 283 | fprintf_filtered (stream, "("); |
| 284 | f77_print_array (type, valaddr, embedded_offset, |
| 285 | address, stream, recurse, original_value, options); |
| 286 | fprintf_filtered (stream, ")"); |
| 287 | } |
| 288 | else |
| 289 | { |
| 290 | struct type *ch_type = TYPE_TARGET_TYPE (type); |
| 291 | |
| 292 | f77_get_dynamic_length_of_aggregate (type); |
| 293 | LA_PRINT_STRING (stream, ch_type, |
| 294 | valaddr + embedded_offset, |
| 295 | TYPE_LENGTH (type) / TYPE_LENGTH (ch_type), |
| 296 | NULL, 0, options); |
| 297 | } |
| 298 | break; |
| 299 | |
| 300 | case TYPE_CODE_PTR: |
| 301 | if (options->format && options->format != 's') |
| 302 | { |
| 303 | val_print_scalar_formatted (type, valaddr, embedded_offset, |
| 304 | original_value, options, 0, stream); |
| 305 | break; |
| 306 | } |
| 307 | else |
| 308 | { |
| 309 | int want_space = 0; |
| 310 | |
| 311 | addr = unpack_pointer (type, valaddr + embedded_offset); |
| 312 | elttype = check_typedef (TYPE_TARGET_TYPE (type)); |
| 313 | |
| 314 | if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) |
| 315 | { |
| 316 | /* Try to print what function it points to. */ |
| 317 | print_function_pointer_address (options, gdbarch, addr, stream); |
| 318 | return; |
| 319 | } |
| 320 | |
| 321 | if (options->symbol_print) |
| 322 | want_space = print_address_demangle (options, gdbarch, addr, |
| 323 | stream, demangle); |
| 324 | else if (options->addressprint && options->format != 's') |
| 325 | { |
| 326 | fputs_filtered (paddress (gdbarch, addr), stream); |
| 327 | want_space = 1; |
| 328 | } |
| 329 | |
| 330 | /* For a pointer to char or unsigned char, also print the string |
| 331 | pointed to, unless pointer is null. */ |
| 332 | if (TYPE_LENGTH (elttype) == 1 |
| 333 | && TYPE_CODE (elttype) == TYPE_CODE_INT |
| 334 | && (options->format == 0 || options->format == 's') |
| 335 | && addr != 0) |
| 336 | { |
| 337 | if (want_space) |
| 338 | fputs_filtered (" ", stream); |
| 339 | i = val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1, |
| 340 | stream, options); |
| 341 | } |
| 342 | return; |
| 343 | } |
| 344 | break; |
| 345 | |
| 346 | case TYPE_CODE_INT: |
| 347 | if (options->format || options->output_format) |
| 348 | { |
| 349 | struct value_print_options opts = *options; |
| 350 | |
| 351 | opts.format = (options->format ? options->format |
| 352 | : options->output_format); |
| 353 | val_print_scalar_formatted (type, valaddr, embedded_offset, |
| 354 | original_value, options, 0, stream); |
| 355 | } |
| 356 | else |
| 357 | { |
| 358 | val_print_type_code_int (type, valaddr + embedded_offset, stream); |
| 359 | /* C and C++ has no single byte int type, char is used instead. |
| 360 | Since we don't know whether the value is really intended to |
| 361 | be used as an integer or a character, print the character |
| 362 | equivalent as well. */ |
| 363 | if (TYPE_LENGTH (type) == 1) |
| 364 | { |
| 365 | LONGEST c; |
| 366 | |
| 367 | fputs_filtered (" ", stream); |
| 368 | c = unpack_long (type, valaddr + embedded_offset); |
| 369 | LA_PRINT_CHAR ((unsigned char) c, type, stream); |
| 370 | } |
| 371 | } |
| 372 | break; |
| 373 | |
| 374 | case TYPE_CODE_STRUCT: |
| 375 | case TYPE_CODE_UNION: |
| 376 | /* Starting from the Fortran 90 standard, Fortran supports derived |
| 377 | types. */ |
| 378 | fprintf_filtered (stream, "( "); |
| 379 | for (index = 0; index < TYPE_NFIELDS (type); index++) |
| 380 | { |
| 381 | int offset = TYPE_FIELD_BITPOS (type, index) / 8; |
| 382 | |
| 383 | val_print (TYPE_FIELD_TYPE (type, index), valaddr, |
| 384 | embedded_offset + offset, |
| 385 | address, stream, recurse + 1, |
| 386 | original_value, options, current_language); |
| 387 | if (index != TYPE_NFIELDS (type) - 1) |
| 388 | fputs_filtered (", ", stream); |
| 389 | } |
| 390 | fprintf_filtered (stream, " )"); |
| 391 | break; |
| 392 | |
| 393 | case TYPE_CODE_REF: |
| 394 | case TYPE_CODE_FUNC: |
| 395 | case TYPE_CODE_FLAGS: |
| 396 | case TYPE_CODE_FLT: |
| 397 | case TYPE_CODE_VOID: |
| 398 | case TYPE_CODE_ERROR: |
| 399 | case TYPE_CODE_RANGE: |
| 400 | case TYPE_CODE_UNDEF: |
| 401 | case TYPE_CODE_COMPLEX: |
| 402 | case TYPE_CODE_BOOL: |
| 403 | case TYPE_CODE_CHAR: |
| 404 | default: |
| 405 | generic_val_print (type, valaddr, embedded_offset, address, |
| 406 | stream, recurse, original_value, options, |
| 407 | &f_decorations); |
| 408 | break; |
| 409 | } |
| 410 | gdb_flush (stream); |
| 411 | } |
| 412 | |
| 413 | static void |
| 414 | info_common_command_for_block (const struct block *block, const char *comname, |
| 415 | int *any_printed) |
| 416 | { |
| 417 | struct block_iterator iter; |
| 418 | struct symbol *sym; |
| 419 | const char *name; |
| 420 | struct value_print_options opts; |
| 421 | |
| 422 | get_user_print_options (&opts); |
| 423 | |
| 424 | ALL_BLOCK_SYMBOLS (block, iter, sym) |
| 425 | if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN) |
| 426 | { |
| 427 | const struct common_block *common = SYMBOL_VALUE_COMMON_BLOCK (sym); |
| 428 | size_t index; |
| 429 | |
| 430 | gdb_assert (SYMBOL_CLASS (sym) == LOC_COMMON_BLOCK); |
| 431 | |
| 432 | if (comname && (!SYMBOL_LINKAGE_NAME (sym) |
| 433 | || strcmp (comname, SYMBOL_LINKAGE_NAME (sym)) != 0)) |
| 434 | continue; |
| 435 | |
| 436 | if (*any_printed) |
| 437 | putchar_filtered ('\n'); |
| 438 | else |
| 439 | *any_printed = 1; |
| 440 | if (SYMBOL_PRINT_NAME (sym)) |
| 441 | printf_filtered (_("Contents of F77 COMMON block '%s':\n"), |
| 442 | SYMBOL_PRINT_NAME (sym)); |
| 443 | else |
| 444 | printf_filtered (_("Contents of blank COMMON block:\n")); |
| 445 | |
| 446 | for (index = 0; index < common->n_entries; index++) |
| 447 | { |
| 448 | struct value *val = NULL; |
| 449 | volatile struct gdb_exception except; |
| 450 | |
| 451 | printf_filtered ("%s = ", |
| 452 | SYMBOL_PRINT_NAME (common->contents[index])); |
| 453 | |
| 454 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 455 | { |
| 456 | val = value_of_variable (common->contents[index], block); |
| 457 | value_print (val, gdb_stdout, &opts); |
| 458 | } |
| 459 | |
| 460 | if (except.reason < 0) |
| 461 | printf_filtered ("<error reading variable: %s>", except.message); |
| 462 | putchar_filtered ('\n'); |
| 463 | } |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | /* This function is used to print out the values in a given COMMON |
| 468 | block. It will always use the most local common block of the |
| 469 | given name. */ |
| 470 | |
| 471 | static void |
| 472 | info_common_command (char *comname, int from_tty) |
| 473 | { |
| 474 | struct frame_info *fi; |
| 475 | const struct block *block; |
| 476 | int values_printed = 0; |
| 477 | |
| 478 | /* We have been told to display the contents of F77 COMMON |
| 479 | block supposedly visible in this function. Let us |
| 480 | first make sure that it is visible and if so, let |
| 481 | us display its contents. */ |
| 482 | |
| 483 | fi = get_selected_frame (_("No frame selected")); |
| 484 | |
| 485 | /* The following is generally ripped off from stack.c's routine |
| 486 | print_frame_info(). */ |
| 487 | |
| 488 | block = get_frame_block (fi, 0); |
| 489 | if (block == NULL) |
| 490 | { |
| 491 | printf_filtered (_("No symbol table info available.\n")); |
| 492 | return; |
| 493 | } |
| 494 | |
| 495 | while (block) |
| 496 | { |
| 497 | info_common_command_for_block (block, comname, &values_printed); |
| 498 | /* After handling the function's top-level block, stop. Don't |
| 499 | continue to its superblock, the block of per-file symbols. */ |
| 500 | if (BLOCK_FUNCTION (block)) |
| 501 | break; |
| 502 | block = BLOCK_SUPERBLOCK (block); |
| 503 | } |
| 504 | |
| 505 | if (!values_printed) |
| 506 | { |
| 507 | if (comname) |
| 508 | printf_filtered (_("No common block '%s'.\n"), comname); |
| 509 | else |
| 510 | printf_filtered (_("No common blocks.\n")); |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | void |
| 515 | _initialize_f_valprint (void) |
| 516 | { |
| 517 | add_info ("common", info_common_command, |
| 518 | _("Print out the values contained in a Fortran COMMON block.")); |
| 519 | if (xdb_commands) |
| 520 | add_com ("lc", class_info, info_common_command, |
| 521 | _("Print out the values contained in a Fortran COMMON block.")); |
| 522 | } |