1 /* Support for printing Fortran values for GDB, the GNU debugger.
3 Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2003, 2005, 2006,
4 2007, 2008, 2009 Free Software Foundation, Inc.
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 (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)
97 /* Recursively go all the way down into a possibly multi-dimensional
98 F77 array and get the bounds. For simple arrays, this is pretty
99 easy but when the bounds are dynamic, we must be very careful
100 to add up all the lengths correctly. Not doing this right
101 will lead to horrendous-looking arrays in parameter lists.
103 This function also works for strings which behave very
104 similarly to arrays. */
106 if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ARRAY
107 || TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRING)
108 f77_get_dynamic_length_of_aggregate (TYPE_TARGET_TYPE (type));
110 /* Recursion ends here, start setting up lengths. */
111 lower_bound = f77_get_lowerbound (type);
112 upper_bound = f77_get_upperbound (type);
114 /* Patch in a valid length value. */
117 (upper_bound - lower_bound + 1) * 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;
129 int upper, lower, retcode;
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, CORE_ADDR address,
167 struct ui_file *stream, int recurse,
168 const struct value_print_options *options,
173 if (nss != ndimensions)
175 for (i = 0; (i < F77_DIM_SIZE (nss) && (*elts) < options->print_max); i++)
177 fprintf_filtered (stream, "( ");
178 f77_print_array_1 (nss + 1, ndimensions, TYPE_TARGET_TYPE (type),
179 valaddr + i * F77_DIM_OFFSET (nss),
180 address + i * F77_DIM_OFFSET (nss),
181 stream, recurse, options, elts);
182 fprintf_filtered (stream, ") ");
184 if (*elts >= options->print_max && i < F77_DIM_SIZE (nss))
185 fprintf_filtered (stream, "...");
189 for (i = 0; i < F77_DIM_SIZE (nss) && (*elts) < options->print_max;
192 val_print (TYPE_TARGET_TYPE (type),
193 valaddr + i * F77_DIM_OFFSET (ndimensions),
195 address + i * F77_DIM_OFFSET (ndimensions),
196 stream, recurse, options, current_language);
198 if (i != (F77_DIM_SIZE (nss) - 1))
199 fprintf_filtered (stream, ", ");
201 if ((*elts == options->print_max - 1)
202 && (i != (F77_DIM_SIZE (nss) - 1)))
203 fprintf_filtered (stream, "...");
208 /* This function gets called to print an F77 array, we set up some
209 stuff and then immediately call f77_print_array_1() */
212 f77_print_array (struct type *type, const gdb_byte *valaddr,
213 CORE_ADDR address, struct ui_file *stream,
214 int recurse, const struct value_print_options *options)
219 ndimensions = calc_f77_array_dims (type);
221 if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
222 error (_("Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
223 ndimensions, MAX_FORTRAN_DIMS);
225 /* Since F77 arrays are stored column-major, we set up an
226 offset table to get at the various row's elements. The
227 offset table contains entries for both offset and subarray size. */
229 f77_create_arrayprint_offset_tbl (type, stream);
231 f77_print_array_1 (1, ndimensions, type, valaddr, address, stream,
232 recurse, options, &elts);
236 /* Print data of type TYPE located at VALADDR (within GDB), which came from
237 the inferior at address ADDRESS, onto stdio stream STREAM according to
238 OPTIONS. The data at VALADDR is in target byte order.
240 If the data are a string pointer, returns the number of string characters
244 f_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
245 CORE_ADDR address, struct ui_file *stream, int recurse,
246 const struct value_print_options *options)
248 unsigned int i = 0; /* Number of characters printed */
249 struct type *elttype;
254 CHECK_TYPEDEF (type);
255 switch (TYPE_CODE (type))
257 case TYPE_CODE_STRING:
258 f77_get_dynamic_length_of_aggregate (type);
259 LA_PRINT_STRING (stream, builtin_type (current_gdbarch)->builtin_char,
260 valaddr, TYPE_LENGTH (type), 0, options);
263 case TYPE_CODE_ARRAY:
264 fprintf_filtered (stream, "(");
265 f77_print_array (type, valaddr, address, stream, recurse, options);
266 fprintf_filtered (stream, ")");
270 if (options->format && options->format != 's')
272 print_scalar_formatted (valaddr, type, options, 0, stream);
277 addr = unpack_pointer (type, valaddr);
278 elttype = check_typedef (TYPE_TARGET_TYPE (type));
280 if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
282 /* Try to print what function it points to. */
283 print_address_demangle (addr, stream, demangle);
284 /* Return value is irrelevant except for string pointers. */
288 if (options->addressprint && options->format != 's')
289 fputs_filtered (paddress (addr), stream);
291 /* For a pointer to char or unsigned char, also print the string
292 pointed to, unless pointer is null. */
293 if (TYPE_LENGTH (elttype) == 1
294 && TYPE_CODE (elttype) == TYPE_CODE_INT
295 && (options->format == 0 || options->format == 's')
297 i = val_print_string (TYPE_TARGET_TYPE (type), addr, -1, stream,
300 /* Return number of characters printed, including the terminating
301 '\0' if we reached the end. val_print_string takes care including
302 the terminating '\0' if necessary. */
308 elttype = check_typedef (TYPE_TARGET_TYPE (type));
309 if (options->addressprint)
312 = extract_typed_address (valaddr + embedded_offset, type);
313 fprintf_filtered (stream, "@");
314 fputs_filtered (paddress (addr), stream);
315 if (options->deref_ref)
316 fputs_filtered (": ", stream);
318 /* De-reference the reference. */
319 if (options->deref_ref)
321 if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
323 struct value *deref_val =
325 (TYPE_TARGET_TYPE (type),
326 unpack_pointer (type, valaddr + embedded_offset));
327 common_val_print (deref_val, stream, recurse,
328 options, current_language);
331 fputs_filtered ("???", stream);
338 print_scalar_formatted (valaddr, type, options, 0, stream);
341 /* FIXME, we should consider, at least for ANSI C language, eliminating
342 the distinction made between FUNCs and POINTERs to FUNCs. */
343 fprintf_filtered (stream, "{");
344 type_print (type, "", stream, -1);
345 fprintf_filtered (stream, "} ");
346 /* Try to print what function it points to, and its address. */
347 print_address_demangle (address, stream, demangle);
351 if (options->format || options->output_format)
353 struct value_print_options opts = *options;
354 opts.format = (options->format ? options->format
355 : options->output_format);
356 print_scalar_formatted (valaddr, type, &opts, 0, stream);
360 val_print_type_code_int (type, valaddr, stream);
361 /* C and C++ has no single byte int type, char is used instead.
362 Since we don't know whether the value is really intended to
363 be used as an integer or a character, print the character
364 equivalent as well. */
365 if (TYPE_LENGTH (type) == 1)
367 fputs_filtered (" ", stream);
368 LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
374 case TYPE_CODE_FLAGS:
376 print_scalar_formatted (valaddr, type, options, 0, stream);
378 val_print_type_code_flags (type, valaddr, stream);
383 print_scalar_formatted (valaddr, type, options, 0, stream);
385 print_floating (valaddr, type, stream);
389 fprintf_filtered (stream, "VOID");
392 case TYPE_CODE_ERROR:
393 fprintf_filtered (stream, "<error type>");
396 case TYPE_CODE_RANGE:
397 /* FIXME, we should not ever have to print one of these yet. */
398 fprintf_filtered (stream, "<range type>");
402 if (options->format || options->output_format)
404 struct value_print_options opts = *options;
405 opts.format = (options->format ? options->format
406 : options->output_format);
407 print_scalar_formatted (valaddr, type, &opts, 0, stream);
411 val = extract_unsigned_integer (valaddr, TYPE_LENGTH (type));
414 fprintf_filtered (stream, ".FALSE.");
416 fprintf_filtered (stream, ".TRUE.");
418 /* Not a legitimate logical type, print as an integer. */
420 /* Bash the type code temporarily. */
421 TYPE_CODE (type) = TYPE_CODE_INT;
422 f_val_print (type, valaddr, 0, address, stream, recurse, options);
423 /* Restore the type code so later uses work as intended. */
424 TYPE_CODE (type) = TYPE_CODE_BOOL;
429 case TYPE_CODE_COMPLEX:
430 type = TYPE_TARGET_TYPE (type);
431 fputs_filtered ("(", stream);
432 print_floating (valaddr, type, stream);
433 fputs_filtered (",", stream);
434 print_floating (valaddr + TYPE_LENGTH (type), type, stream);
435 fputs_filtered (")", stream);
438 case TYPE_CODE_UNDEF:
439 /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
440 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
441 and no complete type for struct foo in that file. */
442 fprintf_filtered (stream, "<incomplete type>");
445 case TYPE_CODE_STRUCT:
446 case TYPE_CODE_UNION:
447 /* Starting from the Fortran 90 standard, Fortran supports derived
449 fprintf_filtered (stream, "( ");
450 for (index = 0; index < TYPE_NFIELDS (type); index++)
452 int offset = TYPE_FIELD_BITPOS (type, index) / 8;
453 f_val_print (TYPE_FIELD_TYPE (type, index), valaddr + offset,
454 embedded_offset, address, stream, recurse, options);
455 if (index != TYPE_NFIELDS (type) - 1)
456 fputs_filtered (", ", stream);
458 fprintf_filtered (stream, " )");
462 error (_("Invalid F77 type code %d in symbol table."), TYPE_CODE (type));
469 list_all_visible_commons (char *funname)
471 SAVED_F77_COMMON_PTR tmp;
473 tmp = head_common_list;
475 printf_filtered (_("All COMMON blocks visible at this level:\n\n"));
479 if (strcmp (tmp->owning_function, funname) == 0)
480 printf_filtered ("%s\n", tmp->name);
486 /* This function is used to print out the values in a given COMMON
487 block. It will always use the most local common block of the
491 info_common_command (char *comname, int from_tty)
493 SAVED_F77_COMMON_PTR the_common;
494 COMMON_ENTRY_PTR entry;
495 struct frame_info *fi;
499 /* We have been told to display the contents of F77 COMMON
500 block supposedly visible in this function. Let us
501 first make sure that it is visible and if so, let
502 us display its contents */
504 fi = get_selected_frame (_("No frame selected"));
506 /* The following is generally ripped off from stack.c's routine
507 print_frame_info() */
509 func = find_pc_function (get_frame_pc (fi));
512 /* In certain pathological cases, the symtabs give the wrong
513 function (when we are in the first function in a file which
514 is compiled without debugging symbols, the previous function
515 is compiled with debugging symbols, and the "foo.o" symbol
516 that is supposed to tell us where the file with debugging symbols
517 ends has been truncated by ar because it is longer than 15
520 So look in the minimal symbol tables as well, and if it comes
521 up with a larger address for the function use that instead.
522 I don't think this can ever cause any problems; there shouldn't
523 be any minimal symbols in the middle of a function.
524 FIXME: (Not necessarily true. What about text labels) */
526 struct minimal_symbol *msymbol =
527 lookup_minimal_symbol_by_pc (get_frame_pc (fi));
530 && (SYMBOL_VALUE_ADDRESS (msymbol)
531 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
532 funname = SYMBOL_LINKAGE_NAME (msymbol);
534 funname = SYMBOL_LINKAGE_NAME (func);
538 struct minimal_symbol *msymbol =
539 lookup_minimal_symbol_by_pc (get_frame_pc (fi));
542 funname = SYMBOL_LINKAGE_NAME (msymbol);
543 else /* Got no 'funname', code below will fail. */
544 error (_("No function found for frame."));
547 /* If comname is NULL, we assume the user wishes to see the
548 which COMMON blocks are visible here and then return */
552 list_all_visible_commons (funname);
556 the_common = find_common_for_function (comname, funname);
560 if (strcmp (comname, BLANK_COMMON_NAME_LOCAL) == 0)
561 printf_filtered (_("Contents of blank COMMON block:\n"));
563 printf_filtered (_("Contents of F77 COMMON block '%s':\n"), comname);
565 printf_filtered ("\n");
566 entry = the_common->entries;
568 while (entry != NULL)
570 print_variable_and_value (NULL, entry->symbol, fi, gdb_stdout, 0);
575 printf_filtered (_("Cannot locate the common block %s in function '%s'\n"),
579 /* This function is used to determine whether there is a
580 F77 common block visible at the current scope called 'comname'. */
584 there_is_a_visible_common_named (char *comname)
586 SAVED_F77_COMMON_PTR the_common;
587 struct frame_info *fi;
592 error (_("Cannot deal with NULL common name!"));
594 fi = get_selected_frame (_("No frame selected"));
596 /* The following is generally ripped off from stack.c's routine
597 print_frame_info() */
599 func = find_pc_function (fi->pc);
602 /* In certain pathological cases, the symtabs give the wrong
603 function (when we are in the first function in a file which
604 is compiled without debugging symbols, the previous function
605 is compiled with debugging symbols, and the "foo.o" symbol
606 that is supposed to tell us where the file with debugging symbols
607 ends has been truncated by ar because it is longer than 15
610 So look in the minimal symbol tables as well, and if it comes
611 up with a larger address for the function use that instead.
612 I don't think this can ever cause any problems; there shouldn't
613 be any minimal symbols in the middle of a function.
614 FIXME: (Not necessarily true. What about text labels) */
616 struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
619 && (SYMBOL_VALUE_ADDRESS (msymbol)
620 > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
621 funname = SYMBOL_LINKAGE_NAME (msymbol);
623 funname = SYMBOL_LINKAGE_NAME (func);
627 struct minimal_symbol *msymbol =
628 lookup_minimal_symbol_by_pc (fi->pc);
631 funname = SYMBOL_LINKAGE_NAME (msymbol);
634 the_common = find_common_for_function (comname, funname);
636 return (the_common ? 1 : 0);
641 _initialize_f_valprint (void)
643 add_info ("common", info_common_command,
644 _("Print out the values contained in a Fortran COMMON block."));
646 add_com ("lc", class_info, info_common_command,
647 _("Print out the values contained in a Fortran COMMON block."));