1 /* Support for printing Fortran values for GDB, the GNU debugger.
3 Copyright (C) 1993-1996, 1998-2000, 2003, 2005-2012 Free Software
6 Contributed by Motorola. Adapted from the C definitions by Farooq Butt
7 (fmbutt@engage.sps.mot.com), additionally worked over by Stan Shebs.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 #include "gdb_string.h"
28 #include "expression.h"
39 static int there_is_a_visible_common_named (char *);
42 extern void _initialize_f_valprint (void);
43 static void info_common_command (char *, int);
44 static void list_all_visible_commons (const char *);
45 static void f77_create_arrayprint_offset_tbl (struct type *,
47 static void f77_get_dynamic_length_of_aggregate (struct type *);
49 int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2];
51 /* Array which holds offsets to be applied to get a row's elements
52 for a given array. Array also holds the size of each subarray. */
54 /* The following macro gives us the size of the nth dimension, Where
57 #define F77_DIM_SIZE(n) (f77_array_offset_tbl[n][1])
59 /* The following gives us the offset for row n where n is 1-based. */
61 #define F77_DIM_OFFSET(n) (f77_array_offset_tbl[n][0])
64 f77_get_lowerbound (struct type *type)
66 if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
67 error (_("Lower bound may not be '*' in F77"));
69 return TYPE_ARRAY_LOWER_BOUND_VALUE (type);
73 f77_get_upperbound (struct type *type)
75 if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
77 /* We have an assumed size array on our hands. Assume that
78 upper_bound == lower_bound so that we show at least 1 element.
79 If the user wants to see more elements, let him manually ask for 'em
80 and we'll subscript the array and show him. */
82 return f77_get_lowerbound (type);
85 return TYPE_ARRAY_UPPER_BOUND_VALUE (type);
88 /* Obtain F77 adjustable array dimensions. */
91 f77_get_dynamic_length_of_aggregate (struct type *type)
96 /* Recursively go all the way down into a possibly multi-dimensional
97 F77 array and get the bounds. For simple arrays, this is pretty
98 easy but when the bounds are dynamic, we must be very careful
99 to add up all the lengths correctly. Not doing this right
100 will lead to horrendous-looking arrays in parameter lists.
102 This function also works for strings which behave very
103 similarly to arrays. */
105 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY
106 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING)
107 f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type));
109 /* Recursion ends here, start setting up lengths. */
110 lower_bound = f77_get_lowerbound (type);
111 upper_bound = f77_get_upperbound (type);
113 /* Patch in a valid length value. */
116 (upper_bound - lower_bound + 1)
117 * TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type)));
120 /* Function that sets up the array offset,size table for the array
124 f77_create_arrayprint_offset_tbl (struct type *type, struct ui_file *stream)
126 struct type *tmp_type;
133 while ((TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY))
135 upper = f77_get_upperbound (tmp_type);
136 lower = f77_get_lowerbound (tmp_type);
138 F77_DIM_SIZE (ndimen) = upper - lower + 1;
140 tmp_type = TYPE_TARGET_TYPE (tmp_type);
144 /* Now we multiply eltlen by all the offsets, so that later we
145 can print out array elements correctly. Up till now we
146 know an offset to apply to get the item but we also
147 have to know how much to add to get to the next item. */
150 eltlen = TYPE_LENGTH (tmp_type);
151 F77_DIM_OFFSET (ndimen) = eltlen;
154 eltlen *= F77_DIM_SIZE (ndimen + 1);
155 F77_DIM_OFFSET (ndimen) = eltlen;
161 /* Actual function which prints out F77 arrays, Valaddr == address in
162 the superior. Address == the address in the inferior. */
165 f77_print_array_1 (int nss, int ndimensions, struct type *type,
166 const gdb_byte *valaddr,
167 int embedded_offset, CORE_ADDR address,
168 struct ui_file *stream, int recurse,
169 const struct value *val,
170 const struct value_print_options *options,
175 if (nss != ndimensions)
178 (i < F77_DIM_SIZE (nss) && (*elts) < options->print_max);
181 fprintf_filtered (stream, "( ");
182 f77_print_array_1 (nss + 1, ndimensions, TYPE_TARGET_TYPE (type),
184 embedded_offset + i * F77_DIM_OFFSET (nss),
186 stream, recurse, val, options, elts);
187 fprintf_filtered (stream, ") ");
189 if (*elts >= options->print_max && i < F77_DIM_SIZE (nss))
190 fprintf_filtered (stream, "...");
194 for (i = 0; i < F77_DIM_SIZE (nss) && (*elts) < options->print_max;
197 val_print (TYPE_TARGET_TYPE (type),
199 embedded_offset + i * F77_DIM_OFFSET (ndimensions),
200 address, stream, recurse,
201 val, options, current_language);
203 if (i != (F77_DIM_SIZE (nss) - 1))
204 fprintf_filtered (stream, ", ");
206 if ((*elts == options->print_max - 1)
207 && (i != (F77_DIM_SIZE (nss) - 1)))
208 fprintf_filtered (stream, "...");
213 /* This function gets called to print an F77 array, we set up some
214 stuff and then immediately call f77_print_array_1(). */
217 f77_print_array (struct type *type, const gdb_byte *valaddr,
219 CORE_ADDR address, struct ui_file *stream,
221 const struct value *val,
222 const struct value_print_options *options)
227 ndimensions = calc_f77_array_dims (type);
229 if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
231 Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
232 ndimensions, MAX_FORTRAN_DIMS);
234 /* Since F77 arrays are stored column-major, we set up an
235 offset table to get at the various row's elements. The
236 offset table contains entries for both offset and subarray size. */
238 f77_create_arrayprint_offset_tbl (type, stream);
240 f77_print_array_1 (1, ndimensions, type, valaddr, embedded_offset,
241 address, stream, recurse, val, options, &elts);
245 /* Decorations for Fortran. */
247 static const struct generic_val_print_decorations f_decorations =
257 /* See val_print for a description of the various parameters of this
258 function; they are identical. */
261 f_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
262 CORE_ADDR address, struct ui_file *stream, int recurse,
263 const struct value *original_value,
264 const struct value_print_options *options)
266 struct gdbarch *gdbarch = get_type_arch (type);
267 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
268 unsigned int i = 0; /* Number of characters printed. */
269 struct type *elttype;
274 CHECK_TYPEDEF (type);
275 switch (TYPE_CODE (type))
277 case TYPE_CODE_STRING:
278 f77_get_dynamic_length_of_aggregate (type);
279 LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char,
280 valaddr + embedded_offset,
281 TYPE_LENGTH (type), NULL, 0, options);
284 case TYPE_CODE_ARRAY:
285 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_CHAR)
287 fprintf_filtered (stream, "(");
288 f77_print_array (type, valaddr, embedded_offset,
289 address, stream, recurse, original_value, options);
290 fprintf_filtered (stream, ")");
294 struct type *ch_type = TYPE_TARGET_TYPE (type);
296 f77_get_dynamic_length_of_aggregate (type);
297 LA_PRINT_STRING (stream, ch_type,
298 valaddr + embedded_offset,
299 TYPE_LENGTH (type) / TYPE_LENGTH (ch_type),
305 if (options->format && options->format != 's')
307 val_print_scalar_formatted (type, valaddr, embedded_offset,
308 original_value, options, 0, stream);
313 addr = unpack_pointer (type, valaddr + embedded_offset);
314 elttype = check_typedef (TYPE_TARGET_TYPE (type));
316 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
318 /* Try to print what function it points to. */
319 print_function_pointer_address (gdbarch, addr, stream,
320 options->addressprint);
324 if (options->addressprint && options->format != 's')
325 fputs_filtered (paddress (gdbarch, addr), stream);
327 /* For a pointer to char or unsigned char, also print the string
328 pointed to, unless pointer is null. */
329 if (TYPE_LENGTH (elttype) == 1
330 && TYPE_CODE (elttype) == TYPE_CODE_INT
331 && (options->format == 0 || options->format == 's')
333 i = val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
340 if (options->format || options->output_format)
342 struct value_print_options opts = *options;
344 opts.format = (options->format ? options->format
345 : options->output_format);
346 val_print_scalar_formatted (type, valaddr, embedded_offset,
347 original_value, options, 0, stream);
351 val_print_type_code_int (type, valaddr + embedded_offset, stream);
352 /* C and C++ has no single byte int type, char is used instead.
353 Since we don't know whether the value is really intended to
354 be used as an integer or a character, print the character
355 equivalent as well. */
356 if (TYPE_LENGTH (type) == 1)
360 fputs_filtered (" ", stream);
361 c = unpack_long (type, valaddr + embedded_offset);
362 LA_PRINT_CHAR ((unsigned char) c, type, stream);
367 case TYPE_CODE_STRUCT:
368 case TYPE_CODE_UNION:
369 /* Starting from the Fortran 90 standard, Fortran supports derived
371 fprintf_filtered (stream, "( ");
372 for (index = 0; index < TYPE_NFIELDS (type); index++)
374 int offset = TYPE_FIELD_BITPOS (type, index) / 8;
376 val_print (TYPE_FIELD_TYPE (type, index), valaddr,
377 embedded_offset + offset,
378 address, stream, recurse + 1,
379 original_value, options, current_language);
380 if (index != TYPE_NFIELDS (type) - 1)
381 fputs_filtered (", ", stream);
383 fprintf_filtered (stream, " )");
388 case TYPE_CODE_FLAGS:
391 case TYPE_CODE_ERROR:
392 case TYPE_CODE_RANGE:
393 case TYPE_CODE_UNDEF:
394 case TYPE_CODE_COMPLEX:
398 generic_val_print (type, valaddr, embedded_offset, address,
399 stream, recurse, original_value, options,
407 list_all_visible_commons (const char *funname)
409 SAVED_F77_COMMON_PTR tmp;
411 tmp = head_common_list;
413 printf_filtered (_("All COMMON blocks visible at this level:\n\n"));
417 if (strcmp (tmp->owning_function, funname) == 0)
418 printf_filtered ("%s\n", tmp->name);
424 /* This function is used to print out the values in a given COMMON
425 block. It will always use the most local common block of the
429 info_common_command (char *comname, int from_tty)
431 SAVED_F77_COMMON_PTR the_common;
432 COMMON_ENTRY_PTR entry;
433 struct frame_info *fi;
434 const char *funname = 0;
437 /* We have been told to display the contents of F77 COMMON
438 block supposedly visible in this function. Let us
439 first make sure that it is visible and if so, let
440 us display its contents. */
442 fi = get_selected_frame (_("No frame selected"));
444 /* The following is generally ripped off from stack.c's routine
445 print_frame_info(). */
447 func = find_pc_function (get_frame_pc (fi));
450 /* In certain pathological cases, the symtabs give the wrong
451 function (when we are in the first function in a file which
452 is compiled without debugging symbols, the previous function
453 is compiled with debugging symbols, and the "foo.o" symbol
454 that is supposed to tell us where the file with debugging symbols
455 ends has been truncated by ar because it is longer than 15
458 So look in the minimal symbol tables as well, and if it comes
459 up with a larger address for the function use that instead.
460 I don't think this can ever cause any problems; there shouldn't
461 be any minimal symbols in the middle of a function.
462 FIXME: (Not necessarily true. What about text labels?) */
464 struct minimal_symbol *msymbol =
465 lookup_minimal_symbol_by_pc (get_frame_pc (fi));
468 && (SYMBOL_VALUE_ADDRESS (msymbol)
469 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
470 funname = SYMBOL_LINKAGE_NAME (msymbol);
472 funname = SYMBOL_LINKAGE_NAME (func);
476 struct minimal_symbol *msymbol =
477 lookup_minimal_symbol_by_pc (get_frame_pc (fi));
480 funname = SYMBOL_LINKAGE_NAME (msymbol);
481 else /* Got no 'funname', code below will fail. */
482 error (_("No function found for frame."));
485 /* If comname is NULL, we assume the user wishes to see the
486 which COMMON blocks are visible here and then return. */
490 list_all_visible_commons (funname);
494 the_common = find_common_for_function (comname, funname);
498 if (strcmp (comname, BLANK_COMMON_NAME_LOCAL) == 0)
499 printf_filtered (_("Contents of blank COMMON block:\n"));
501 printf_filtered (_("Contents of F77 COMMON block '%s':\n"), comname);
503 printf_filtered ("\n");
504 entry = the_common->entries;
506 while (entry != NULL)
508 print_variable_and_value (NULL, entry->symbol, fi, gdb_stdout, 0);
513 printf_filtered (_("Cannot locate the common block %s in function '%s'\n"),
517 /* This function is used to determine whether there is a
518 F77 common block visible at the current scope called 'comname'. */
522 there_is_a_visible_common_named (char *comname)
524 SAVED_F77_COMMON_PTR the_common;
525 struct frame_info *fi;
530 error (_("Cannot deal with NULL common name!"));
532 fi = get_selected_frame (_("No frame selected"));
534 /* The following is generally ripped off from stack.c's routine
535 print_frame_info(). */
537 func = find_pc_function (fi->pc);
540 /* In certain pathological cases, the symtabs give the wrong
541 function (when we are in the first function in a file which
542 is compiled without debugging symbols, the previous function
543 is compiled with debugging symbols, and the "foo.o" symbol
544 that is supposed to tell us where the file with debugging symbols
545 ends has been truncated by ar because it is longer than 15
548 So look in the minimal symbol tables as well, and if it comes
549 up with a larger address for the function use that instead.
550 I don't think this can ever cause any problems; there shouldn't
551 be any minimal symbols in the middle of a function.
552 FIXME: (Not necessarily true. What about text labels?) */
554 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
557 && (SYMBOL_VALUE_ADDRESS (msymbol)
558 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
559 funname = SYMBOL_LINKAGE_NAME (msymbol);
561 funname = SYMBOL_LINKAGE_NAME (func);
565 struct minimal_symbol *msymbol =
566 lookup_minimal_symbol_by_pc (fi->pc);
569 funname = SYMBOL_LINKAGE_NAME (msymbol);
572 the_common = find_common_for_function (comname, funname);
574 return (the_common ? 1 : 0);
579 _initialize_f_valprint (void)
581 add_info ("common", info_common_command,
582 _("Print out the values contained in a Fortran COMMON block."));
584 add_com ("lc", class_info, info_common_command,
585 _("Print out the values contained in a Fortran COMMON block."));