1 /* Support for printing Fortran values for GDB, the GNU debugger.
3 Copyright (C) 1993-2016 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 extern void _initialize_f_valprint (void);
38 static void info_common_command (char *, int);
39 static void f77_get_dynamic_length_of_aggregate (struct type *);
41 int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2];
43 /* Array which holds offsets to be applied to get a row's elements
44 for a given array. Array also holds the size of each subarray. */
47 f77_get_lowerbound (struct type *type)
49 if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
50 error (_("Lower bound may not be '*' in F77"));
52 return TYPE_ARRAY_LOWER_BOUND_VALUE (type);
56 f77_get_upperbound (struct type *type)
58 if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
60 /* We have an assumed size array on our hands. Assume that
61 upper_bound == lower_bound so that we show at least 1 element.
62 If the user wants to see more elements, let him manually ask for 'em
63 and we'll subscript the array and show him. */
65 return f77_get_lowerbound (type);
68 return TYPE_ARRAY_UPPER_BOUND_VALUE (type);
71 /* Obtain F77 adjustable array dimensions. */
74 f77_get_dynamic_length_of_aggregate (struct type *type)
79 /* Recursively go all the way down into a possibly multi-dimensional
80 F77 array and get the bounds. For simple arrays, this is pretty
81 easy but when the bounds are dynamic, we must be very careful
82 to add up all the lengths correctly. Not doing this right
83 will lead to horrendous-looking arrays in parameter lists.
85 This function also works for strings which behave very
86 similarly to arrays. */
88 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY
89 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING)
90 f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type));
92 /* Recursion ends here, start setting up lengths. */
93 lower_bound = f77_get_lowerbound (type);
94 upper_bound = f77_get_upperbound (type);
96 /* Patch in a valid length value. */
99 (upper_bound - lower_bound + 1)
100 * TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type)));
103 /* Actual function which prints out F77 arrays, Valaddr == address in
104 the superior. Address == the address in the inferior. */
107 f77_print_array_1 (int nss, int ndimensions, struct type *type,
108 const gdb_byte *valaddr,
109 int embedded_offset, CORE_ADDR address,
110 struct ui_file *stream, int recurse,
111 const struct value *val,
112 const struct value_print_options *options,
115 struct type *range_type = TYPE_INDEX_TYPE (check_typedef (type));
116 CORE_ADDR addr = address + embedded_offset;
117 LONGEST lowerbound, upperbound;
120 get_discrete_bounds (range_type, &lowerbound, &upperbound);
122 if (nss != ndimensions)
124 size_t dim_size = TYPE_LENGTH (TYPE_TARGET_TYPE (type));
128 (i < upperbound + 1 && (*elts) < options->print_max);
131 struct value *subarray = value_from_contents_and_address
132 (TYPE_TARGET_TYPE (type), value_contents_for_printing_const (val)
133 + offs, addr + offs);
135 fprintf_filtered (stream, "( ");
136 f77_print_array_1 (nss + 1, ndimensions, value_type (subarray),
137 value_contents_for_printing (subarray),
138 value_embedded_offset (subarray),
139 value_address (subarray),
140 stream, recurse, subarray, options, elts);
142 fprintf_filtered (stream, ") ");
144 if (*elts >= options->print_max && i < upperbound)
145 fprintf_filtered (stream, "...");
149 for (i = lowerbound; i < upperbound + 1 && (*elts) < options->print_max;
152 struct value *elt = value_subscript ((struct value *)val, i);
154 val_print (value_type (elt),
155 value_embedded_offset (elt),
156 value_address (elt), stream, recurse,
157 elt, options, current_language);
160 fprintf_filtered (stream, ", ");
162 if ((*elts == options->print_max - 1)
163 && (i != upperbound))
164 fprintf_filtered (stream, "...");
169 /* This function gets called to print an F77 array, we set up some
170 stuff and then immediately call f77_print_array_1(). */
173 f77_print_array (struct type *type, const gdb_byte *valaddr,
175 CORE_ADDR address, struct ui_file *stream,
177 const struct value *val,
178 const struct value_print_options *options)
183 ndimensions = calc_f77_array_dims (type);
185 if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
187 Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
188 ndimensions, MAX_FORTRAN_DIMS);
190 f77_print_array_1 (1, ndimensions, type, valaddr, embedded_offset,
191 address, stream, recurse, val, options, &elts);
195 /* Decorations for Fortran. */
197 static const struct generic_val_print_decorations f_decorations =
209 /* See val_print for a description of the various parameters of this
210 function; they are identical. */
213 f_val_print (struct type *type, int embedded_offset,
214 CORE_ADDR address, struct ui_file *stream, int recurse,
215 struct value *original_value,
216 const struct value_print_options *options)
218 struct gdbarch *gdbarch = get_type_arch (type);
219 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
220 int printed_field = 0; /* Number of fields printed. */
221 struct type *elttype;
224 const gdb_byte *valaddr =value_contents_for_printing (original_value);
226 type = check_typedef (type);
227 switch (TYPE_CODE (type))
229 case TYPE_CODE_STRING:
230 f77_get_dynamic_length_of_aggregate (type);
231 LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char,
232 valaddr + embedded_offset,
233 TYPE_LENGTH (type), NULL, 0, options);
236 case TYPE_CODE_ARRAY:
237 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_CHAR)
239 fprintf_filtered (stream, "(");
240 f77_print_array (type, valaddr, embedded_offset,
241 address, stream, recurse, original_value, options);
242 fprintf_filtered (stream, ")");
246 struct type *ch_type = TYPE_TARGET_TYPE (type);
248 f77_get_dynamic_length_of_aggregate (type);
249 LA_PRINT_STRING (stream, ch_type,
250 valaddr + embedded_offset,
251 TYPE_LENGTH (type) / TYPE_LENGTH (ch_type),
257 if (options->format && options->format != 's')
259 val_print_scalar_formatted (type, embedded_offset,
260 original_value, options, 0, stream);
267 addr = unpack_pointer (type, valaddr + embedded_offset);
268 elttype = check_typedef (TYPE_TARGET_TYPE (type));
270 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
272 /* Try to print what function it points to. */
273 print_function_pointer_address (options, gdbarch, addr, stream);
277 if (options->symbol_print)
278 want_space = print_address_demangle (options, gdbarch, addr,
280 else if (options->addressprint && options->format != 's')
282 fputs_filtered (paddress (gdbarch, addr), stream);
286 /* For a pointer to char or unsigned char, also print the string
287 pointed to, unless pointer is null. */
288 if (TYPE_LENGTH (elttype) == 1
289 && TYPE_CODE (elttype) == TYPE_CODE_INT
290 && (options->format == 0 || options->format == 's')
294 fputs_filtered (" ", stream);
295 val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
303 if (options->format || options->output_format)
305 struct value_print_options opts = *options;
307 opts.format = (options->format ? options->format
308 : options->output_format);
309 val_print_scalar_formatted (type, embedded_offset,
310 original_value, &opts, 0, stream);
314 val_print_type_code_int (type, valaddr + embedded_offset, stream);
315 /* C and C++ has no single byte int type, char is used instead.
316 Since we don't know whether the value is really intended to
317 be used as an integer or a character, print the character
318 equivalent as well. */
319 if (TYPE_LENGTH (type) == 1)
323 fputs_filtered (" ", stream);
324 c = unpack_long (type, valaddr + embedded_offset);
325 LA_PRINT_CHAR ((unsigned char) c, type, stream);
330 case TYPE_CODE_STRUCT:
331 case TYPE_CODE_UNION:
332 /* Starting from the Fortran 90 standard, Fortran supports derived
334 fprintf_filtered (stream, "( ");
335 for (index = 0; index < TYPE_NFIELDS (type); index++)
337 struct value *field = value_field
338 ((struct value *)original_value, index);
340 struct type *field_type = check_typedef (TYPE_FIELD_TYPE (type, index));
343 if (TYPE_CODE (field_type) != TYPE_CODE_FUNC)
345 const char *field_name;
347 if (printed_field > 0)
348 fputs_filtered (", ", stream);
350 field_name = TYPE_FIELD_NAME (type, index);
351 if (field_name != NULL)
353 fputs_filtered (field_name, stream);
354 fputs_filtered (" = ", stream);
357 val_print (value_type (field),
358 value_embedded_offset (field),
359 value_address (field), stream, recurse + 1,
360 field, options, current_language);
365 fprintf_filtered (stream, " )");
370 case TYPE_CODE_FLAGS:
373 case TYPE_CODE_ERROR:
374 case TYPE_CODE_RANGE:
375 case TYPE_CODE_UNDEF:
376 case TYPE_CODE_COMPLEX:
380 generic_val_print (type, embedded_offset, address,
381 stream, recurse, original_value, options,
389 info_common_command_for_block (const struct block *block, const char *comname,
392 struct block_iterator iter;
395 struct value_print_options opts;
397 get_user_print_options (&opts);
399 ALL_BLOCK_SYMBOLS (block, iter, sym)
400 if (SYMBOL_DOMAIN (sym) == COMMON_BLOCK_DOMAIN)
402 const struct common_block *common = SYMBOL_VALUE_COMMON_BLOCK (sym);
405 gdb_assert (SYMBOL_CLASS (sym) == LOC_COMMON_BLOCK);
407 if (comname && (!SYMBOL_LINKAGE_NAME (sym)
408 || strcmp (comname, SYMBOL_LINKAGE_NAME (sym)) != 0))
412 putchar_filtered ('\n');
415 if (SYMBOL_PRINT_NAME (sym))
416 printf_filtered (_("Contents of F77 COMMON block '%s':\n"),
417 SYMBOL_PRINT_NAME (sym));
419 printf_filtered (_("Contents of blank COMMON block:\n"));
421 for (index = 0; index < common->n_entries; index++)
423 struct value *val = NULL;
425 printf_filtered ("%s = ",
426 SYMBOL_PRINT_NAME (common->contents[index]));
430 val = value_of_variable (common->contents[index], block);
431 value_print (val, gdb_stdout, &opts);
434 CATCH (except, RETURN_MASK_ERROR)
436 printf_filtered ("<error reading variable: %s>", except.message);
440 putchar_filtered ('\n');
445 /* This function is used to print out the values in a given COMMON
446 block. It will always use the most local common block of the
450 info_common_command (char *comname, int from_tty)
452 struct frame_info *fi;
453 const struct block *block;
454 int values_printed = 0;
456 /* We have been told to display the contents of F77 COMMON
457 block supposedly visible in this function. Let us
458 first make sure that it is visible and if so, let
459 us display its contents. */
461 fi = get_selected_frame (_("No frame selected"));
463 /* The following is generally ripped off from stack.c's routine
464 print_frame_info(). */
466 block = get_frame_block (fi, 0);
469 printf_filtered (_("No symbol table info available.\n"));
475 info_common_command_for_block (block, comname, &values_printed);
476 /* After handling the function's top-level block, stop. Don't
477 continue to its superblock, the block of per-file symbols. */
478 if (BLOCK_FUNCTION (block))
480 block = BLOCK_SUPERBLOCK (block);
486 printf_filtered (_("No common block '%s'.\n"), comname);
488 printf_filtered (_("No common blocks.\n"));
493 _initialize_f_valprint (void)
495 add_info ("common", info_common_command,
496 _("Print out the values contained in a Fortran COMMON block."));