1 /* Support for printing Fortran values for GDB, the GNU debugger.
3 Copyright (C) 1993-2019 Free Software Foundation, Inc.
5 Contributed by Motorola. Adapted from the C definitions by Farooq Butt
6 (fmbutt@engage.sps.mot.com), additionally worked over by Stan Shebs.
8 This file is part of GDB.
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.
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.
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/>. */
26 #include "expression.h"
35 #include "dictionary.h"
37 static void f77_get_dynamic_length_of_aggregate (struct type *);
39 int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2];
41 /* Array which holds offsets to be applied to get a row's elements
42 for a given array. Array also holds the size of each subarray. */
45 f77_get_lowerbound (struct type *type)
47 if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
48 error (_("Lower bound may not be '*' in F77"));
50 return TYPE_ARRAY_LOWER_BOUND_VALUE (type);
54 f77_get_upperbound (struct type *type)
56 if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
58 /* We have an assumed size array on our hands. Assume that
59 upper_bound == lower_bound so that we show at least 1 element.
60 If the user wants to see more elements, let him manually ask for 'em
61 and we'll subscript the array and show him. */
63 return f77_get_lowerbound (type);
66 return TYPE_ARRAY_UPPER_BOUND_VALUE (type);
69 /* Obtain F77 adjustable array dimensions. */
72 f77_get_dynamic_length_of_aggregate (struct type *type)
77 /* Recursively go all the way down into a possibly multi-dimensional
78 F77 array and get the bounds. For simple arrays, this is pretty
79 easy but when the bounds are dynamic, we must be very careful
80 to add up all the lengths correctly. Not doing this right
81 will lead to horrendous-looking arrays in parameter lists.
83 This function also works for strings which behave very
84 similarly to arrays. */
86 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY
87 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING)
88 f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type));
90 /* Recursion ends here, start setting up lengths. */
91 lower_bound = f77_get_lowerbound (type);
92 upper_bound = f77_get_upperbound (type);
94 /* Patch in a valid length value. */
97 (upper_bound - lower_bound + 1)
98 * TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type)));
101 /* Actual function which prints out F77 arrays, Valaddr == address in
102 the superior. Address == the address in the inferior. */
105 f77_print_array_1 (int nss, int ndimensions, struct type *type,
106 const gdb_byte *valaddr,
107 int embedded_offset, CORE_ADDR address,
108 struct ui_file *stream, int recurse,
109 const struct value *val,
110 const struct value_print_options *options,
113 struct type *range_type = TYPE_INDEX_TYPE (check_typedef (type));
114 CORE_ADDR addr = address + embedded_offset;
115 LONGEST lowerbound, upperbound;
118 get_discrete_bounds (range_type, &lowerbound, &upperbound);
120 if (nss != ndimensions)
122 size_t dim_size = TYPE_LENGTH (TYPE_TARGET_TYPE (type));
126 (i < upperbound + 1 && (*elts) < options->print_max);
129 struct value *subarray = value_from_contents_and_address
130 (TYPE_TARGET_TYPE (type), value_contents_for_printing_const (val)
131 + offs, addr + offs);
133 fprintf_filtered (stream, "( ");
134 f77_print_array_1 (nss + 1, ndimensions, value_type (subarray),
135 value_contents_for_printing (subarray),
136 value_embedded_offset (subarray),
137 value_address (subarray),
138 stream, recurse, subarray, options, elts);
140 fprintf_filtered (stream, ") ");
142 if (*elts >= options->print_max && i < upperbound)
143 fprintf_filtered (stream, "...");
147 for (i = lowerbound; i < upperbound + 1 && (*elts) < options->print_max;
150 struct value *elt = value_subscript ((struct value *)val, i);
152 val_print (value_type (elt),
153 value_embedded_offset (elt),
154 value_address (elt), stream, recurse,
155 elt, options, current_language);
158 fprintf_filtered (stream, ", ");
160 if ((*elts == options->print_max - 1)
161 && (i != upperbound))
162 fprintf_filtered (stream, "...");
167 /* This function gets called to print an F77 array, we set up some
168 stuff and then immediately call f77_print_array_1(). */
171 f77_print_array (struct type *type, const gdb_byte *valaddr,
173 CORE_ADDR address, struct ui_file *stream,
175 const struct value *val,
176 const struct value_print_options *options)
181 ndimensions = calc_f77_array_dims (type);
183 if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
185 Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
186 ndimensions, MAX_FORTRAN_DIMS);
188 f77_print_array_1 (1, ndimensions, type, valaddr, embedded_offset,
189 address, stream, recurse, val, options, &elts);
193 /* Decorations for Fortran. */
195 static const struct generic_val_print_decorations f_decorations =
207 /* See val_print for a description of the various parameters of this
208 function; they are identical. */
211 f_val_print (struct type *type, int embedded_offset,
212 CORE_ADDR address, struct ui_file *stream, int recurse,
213 struct value *original_value,
214 const struct value_print_options *options)
216 struct gdbarch *gdbarch = get_type_arch (type);
217 int printed_field = 0; /* Number of fields printed. */
218 struct type *elttype;
221 const gdb_byte *valaddr =value_contents_for_printing (original_value);
223 type = check_typedef (type);
224 switch (TYPE_CODE (type))
226 case TYPE_CODE_STRING:
227 f77_get_dynamic_length_of_aggregate (type);
228 LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char,
229 valaddr + embedded_offset,
230 TYPE_LENGTH (type), NULL, 0, options);
233 case TYPE_CODE_ARRAY:
234 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_CHAR)
236 fprintf_filtered (stream, "(");
237 f77_print_array (type, valaddr, embedded_offset,
238 address, stream, recurse, original_value, options);
239 fprintf_filtered (stream, ")");
243 struct type *ch_type = TYPE_TARGET_TYPE (type);
245 f77_get_dynamic_length_of_aggregate (type);
246 LA_PRINT_STRING (stream, ch_type,
247 valaddr + embedded_offset,
248 TYPE_LENGTH (type) / TYPE_LENGTH (ch_type),
254 if (options->format && options->format != 's')
256 val_print_scalar_formatted (type, embedded_offset,
257 original_value, options, 0, stream);
264 addr = unpack_pointer (type, valaddr + embedded_offset);
265 elttype = check_typedef (TYPE_TARGET_TYPE (type));
267 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
269 /* Try to print what function it points to. */
270 print_function_pointer_address (options, gdbarch, addr, stream);
274 if (options->symbol_print)
275 want_space = print_address_demangle (options, gdbarch, addr,
277 else if (options->addressprint && options->format != 's')
279 fputs_filtered (paddress (gdbarch, addr), stream);
283 /* For a pointer to char or unsigned char, also print the string
284 pointed to, unless pointer is null. */
285 if (TYPE_LENGTH (elttype) == 1
286 && TYPE_CODE (elttype) == TYPE_CODE_INT
287 && (options->format == 0 || options->format == 's')
291 fputs_filtered (" ", stream);
292 val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
300 if (options->format || options->output_format)
302 struct value_print_options opts = *options;
304 opts.format = (options->format ? options->format
305 : options->output_format);
306 val_print_scalar_formatted (type, embedded_offset,
307 original_value, &opts, 0, stream);
310 val_print_scalar_formatted (type, embedded_offset,
311 original_value, options, 0, stream);
314 case TYPE_CODE_STRUCT:
315 case TYPE_CODE_UNION:
316 /* Starting from the Fortran 90 standard, Fortran supports derived
318 fprintf_filtered (stream, "( ");
319 for (index = 0; index < TYPE_NFIELDS (type); index++)
321 struct value *field = value_field
322 ((struct value *)original_value, index);
324 struct type *field_type = check_typedef (TYPE_FIELD_TYPE (type, index));
327 if (TYPE_CODE (field_type) != TYPE_CODE_FUNC)
329 const char *field_name;
331 if (printed_field > 0)
332 fputs_filtered (", ", stream);
334 field_name = TYPE_FIELD_NAME (type, index);
335 if (field_name != NULL)
337 fputs_filtered (field_name, stream);
338 fputs_filtered (" = ", stream);
341 val_print (value_type (field),
342 value_embedded_offset (field),
343 value_address (field), stream, recurse + 1,
344 field, options, current_language);
349 fprintf_filtered (stream, " )");
354 case TYPE_CODE_FLAGS:
357 case TYPE_CODE_ERROR:
358 case TYPE_CODE_RANGE:
359 case TYPE_CODE_UNDEF:
360 case TYPE_CODE_COMPLEX:
364 generic_val_print (type, embedded_offset, address,
365 stream, recurse, original_value, options,
372 info_common_command_for_block (const struct block *block, const char *comname,
375 struct block_iterator iter;
377 struct value_print_options opts;
379 get_user_print_options (&opts);
381 ALL_BLOCK_SYMBOLS (block, iter, sym)
382 if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN)
384 const struct common_block *common = SYMBOL_VALUE_COMMON_BLOCK (sym);
387 gdb_assert (SYMBOL_CLASS (sym) == LOC_COMMON_BLOCK);
389 if (comname && (!SYMBOL_LINKAGE_NAME (sym)
390 || strcmp (comname, SYMBOL_LINKAGE_NAME (sym)) != 0))
394 putchar_filtered ('\n');
397 if (SYMBOL_PRINT_NAME (sym))
398 printf_filtered (_("Contents of F77 COMMON block '%s':\n"),
399 SYMBOL_PRINT_NAME (sym));
401 printf_filtered (_("Contents of blank COMMON block:\n"));
403 for (index = 0; index < common->n_entries; index++)
405 struct value *val = NULL;
407 printf_filtered ("%s = ",
408 SYMBOL_PRINT_NAME (common->contents[index]));
412 val = value_of_variable (common->contents[index], block);
413 value_print (val, gdb_stdout, &opts);
416 catch (const gdb_exception_RETURN_MASK_ERROR &except)
418 printf_filtered ("<error reading variable: %s>",
422 putchar_filtered ('\n');
427 /* This function is used to print out the values in a given COMMON
428 block. It will always use the most local common block of the
432 info_common_command (const char *comname, int from_tty)
434 struct frame_info *fi;
435 const struct block *block;
436 int values_printed = 0;
438 /* We have been told to display the contents of F77 COMMON
439 block supposedly visible in this function. Let us
440 first make sure that it is visible and if so, let
441 us display its contents. */
443 fi = get_selected_frame (_("No frame selected"));
445 /* The following is generally ripped off from stack.c's routine
446 print_frame_info(). */
448 block = get_frame_block (fi, 0);
451 printf_filtered (_("No symbol table info available.\n"));
457 info_common_command_for_block (block, comname, &values_printed);
458 /* After handling the function's top-level block, stop. Don't
459 continue to its superblock, the block of per-file symbols. */
460 if (BLOCK_FUNCTION (block))
462 block = BLOCK_SUPERBLOCK (block);
468 printf_filtered (_("No common block '%s'.\n"), comname);
470 printf_filtered (_("No common blocks.\n"));
475 _initialize_f_valprint (void)
477 add_info ("common", info_common_command,
478 _("Print out the values contained in a Fortran COMMON block."));