gdb/f-valprint.c

   1 /* Support for printing Fortran values for GDB, the GNU debugger.
   2
   3    Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2003, 2005, 2006,
   4    2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5
   6    Contributed by Motorola.  Adapted from the C definitions by Farooq Butt
   7    (fmbutt@engage.sps.mot.com), additionally worked over by Stan Shebs.
   8
   9    This file is part of GDB.
  10
  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.
  15
  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.
  20
  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/>.  */
  23
  24 #include "defs.h"
  25 #include "gdb_string.h"
  26 #include "symtab.h"
  27 #include "gdbtypes.h"
  28 #include "expression.h"
  29 #include "value.h"
  30 #include "valprint.h"
  31 #include "language.h"
  32 #include "f-lang.h"
  33 #include "frame.h"
  34 #include "gdbcore.h"
  35 #include "command.h"
  36 #include "block.h"
  37
  38 #if 0
  39 static int there_is_a_visible_common_named (char *);
  40 #endif
  41
  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 *,
  46                                               struct ui_file *);
  47 static void f77_get_dynamic_length_of_aggregate (struct type *);
  48
  49 int f77_array_offset_tbl[MAX_FORTRAN_DIMS + 1][2];
  50
  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.  */
  53
  54 /* The following macro gives us the size of the nth dimension, Where
  55    n is 1 based.  */
  56
  57 #define F77_DIM_SIZE(n) (f77_array_offset_tbl[n][1])
  58
  59 /* The following gives us the offset for row n where n is 1-based.  */
  60
  61 #define F77_DIM_OFFSET(n) (f77_array_offset_tbl[n][0])
  62
  63 int
  64 f77_get_lowerbound (struct type *type)
  65 {
  66   if (TYPE_ARRAY_LOWER_BOUND_IS_UNDEFINED (type))
  67     error (_("Lower bound may not be '*' in F77"));
  68
  69   return TYPE_ARRAY_LOWER_BOUND_VALUE (type);
  70 }
  71
  72 int
  73 f77_get_upperbound (struct type *type)
  74 {
  75   if (TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
  76     {
  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.  */
  81
  82       return f77_get_lowerbound (type);
  83     }
  84
  85   return TYPE_ARRAY_UPPER_BOUND_VALUE (type);
  86 }
  87
  88 /* Obtain F77 adjustable array dimensions.  */
  89
  90 static void
  91 f77_get_dynamic_length_of_aggregate (struct type *type)
  92 {
  93   int upper_bound = -1;
  94   int lower_bound = 1;
  95
  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.
 101
 102      This function also works for strings which behave very
 103      similarly to arrays.  */
 104
 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));
 108
 109   /* Recursion ends here, start setting up lengths.  */
 110   lower_bound = f77_get_lowerbound (type);
 111   upper_bound = f77_get_upperbound (type);
 112
 113   /* Patch in a valid length value.  */
 114
 115   TYPE_LENGTH (type) =
 116     (upper_bound - lower_bound + 1)
 117     * TYPE_LENGTH (check_typedef (TYPE_TARGET_TYPE (type)));
 118 }
 119
 120 /* Function that sets up the array offset,size table for the array
 121    type "type".  */
 122
 123 static void
 124 f77_create_arrayprint_offset_tbl (struct type *type, struct ui_file *stream)
 125 {
 126   struct type *tmp_type;
 127   int eltlen;
 128   int ndimen = 1;
 129   int upper, lower;
 130
 131   tmp_type = type;
 132
 133   while ((TYPE_CODE (tmp_type) == TYPE_CODE_ARRAY))
 134     {
 135       upper = f77_get_upperbound (tmp_type);
 136       lower = f77_get_lowerbound (tmp_type);
 137
 138       F77_DIM_SIZE (ndimen) = upper - lower + 1;
 139
 140       tmp_type = TYPE_TARGET_TYPE (tmp_type);
 141       ndimen++;
 142     }
 143
 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.  */
 148
 149   ndimen--;
 150   eltlen = TYPE_LENGTH (tmp_type);
 151   F77_DIM_OFFSET (ndimen) = eltlen;
 152   while (--ndimen > 0)
 153     {
 154       eltlen *= F77_DIM_SIZE (ndimen + 1);
 155       F77_DIM_OFFSET (ndimen) = eltlen;
 156     }
 157 }
 158
 159
 160
 161 /* Actual function which prints out F77 arrays, Valaddr == address in
 162    the superior.  Address == the address in the inferior.  */
 163
 164 static void
 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,
 171                    int *elts)
 172 {
 173   int i;
 174
 175   if (nss != ndimensions)
 176     {
 177       for (i = 0;
 178            (i < F77_DIM_SIZE (nss) && (*elts) < options->print_max);
 179            i++)
 180         {
 181           fprintf_filtered (stream, "( ");
 182           f77_print_array_1 (nss + 1, ndimensions, TYPE_TARGET_TYPE (type),
 183                              valaddr,
 184                              embedded_offset + i * F77_DIM_OFFSET (nss),
 185                              address,
 186                              stream, recurse, val, options, elts);
 187           fprintf_filtered (stream, ") ");
 188         }
 189       if (*elts >= options->print_max && i < F77_DIM_SIZE (nss))
 190         fprintf_filtered (stream, "...");
 191     }
 192   else
 193     {
 194       for (i = 0; i < F77_DIM_SIZE (nss) && (*elts) < options->print_max;
 195            i++, (*elts)++)
 196         {
 197           val_print (TYPE_TARGET_TYPE (type),
 198                      valaddr,
 199                      embedded_offset + i * F77_DIM_OFFSET (ndimensions),
 200                      address, stream, recurse,
 201                      val, options, current_language);
 202
 203           if (i != (F77_DIM_SIZE (nss) - 1))
 204             fprintf_filtered (stream, ", ");
 205
 206           if ((*elts == options->print_max - 1)
 207               && (i != (F77_DIM_SIZE (nss) - 1)))
 208             fprintf_filtered (stream, "...");
 209         }
 210     }
 211 }
 212
 213 /* This function gets called to print an F77 array, we set up some
 214    stuff and then immediately call f77_print_array_1().  */
 215
 216 static void
 217 f77_print_array (struct type *type, const gdb_byte *valaddr,
 218                  int embedded_offset,
 219                  CORE_ADDR address, struct ui_file *stream,
 220                  int recurse,
 221                  const struct value *val,
 222                  const struct value_print_options *options)
 223 {
 224   int ndimensions;
 225   int elts = 0;
 226
 227   ndimensions = calc_f77_array_dims (type);
 228
 229   if (ndimensions > MAX_FORTRAN_DIMS || ndimensions < 0)
 230     error (_("\
 231 Type node corrupt! F77 arrays cannot have %d subscripts (%d Max)"),
 232            ndimensions, MAX_FORTRAN_DIMS);
 233
 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.  */
 237
 238   f77_create_arrayprint_offset_tbl (type, stream);
 239
 240   f77_print_array_1 (1, ndimensions, type, valaddr, embedded_offset,
 241                      address, stream, recurse, val, options, &elts);
 242 }
 243 \f
 244
 245 /* See val_print for a description of the various parameters of this
 246    function; they are identical.  The semantics of the return value is
 247    also identical to val_print.  */
 248
 249 int
 250 f_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
 251              CORE_ADDR address, struct ui_file *stream, int recurse,
 252              const struct value *original_value,
 253              const struct value_print_options *options)
 254 {
 255   struct gdbarch *gdbarch = get_type_arch (type);
 256   enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
 257   unsigned int i = 0;   /* Number of characters printed.  */
 258   struct type *elttype;
 259   LONGEST val;
 260   CORE_ADDR addr;
 261   int index;
 262
 263   CHECK_TYPEDEF (type);
 264   switch (TYPE_CODE (type))
 265     {
 266     case TYPE_CODE_STRING:
 267       f77_get_dynamic_length_of_aggregate (type);
 268       LA_PRINT_STRING (stream, builtin_type (gdbarch)->builtin_char,
 269                        valaddr + embedded_offset,
 270                        TYPE_LENGTH (type), NULL, 0, options);
 271       break;
 272
 273     case TYPE_CODE_ARRAY:
 274       if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_CHAR)
 275         {
 276           fprintf_filtered (stream, "(");
 277           f77_print_array (type, valaddr, embedded_offset,
 278                            address, stream, recurse, original_value, options);
 279           fprintf_filtered (stream, ")");
 280         }
 281       else
 282         {
 283           struct type *ch_type = TYPE_TARGET_TYPE (type);
 284
 285           f77_get_dynamic_length_of_aggregate (type);
 286           LA_PRINT_STRING (stream, ch_type,
 287                            valaddr + embedded_offset,
 288                            TYPE_LENGTH (type) / TYPE_LENGTH (ch_type),
 289                            NULL, 0, options);
 290         }
 291       break;
 292
 293     case TYPE_CODE_PTR:
 294       if (options->format && options->format != 's')
 295         {
 296           val_print_scalar_formatted (type, valaddr, embedded_offset,
 297                                       original_value, options, 0, stream);
 298           break;
 299         }
 300       else
 301         {
 302           addr = unpack_pointer (type, valaddr + embedded_offset);
 303           elttype = check_typedef (TYPE_TARGET_TYPE (type));
 304
 305           if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
 306             {
 307               /* Try to print what function it points to.  */
 308               print_address_demangle (gdbarch, addr, stream, demangle);
 309               /* Return value is irrelevant except for string pointers.  */
 310               return 0;
 311             }
 312
 313           if (options->addressprint && options->format != 's')
 314             fputs_filtered (paddress (gdbarch, addr), stream);
 315
 316           /* For a pointer to char or unsigned char, also print the string
 317              pointed to, unless pointer is null.  */
 318           if (TYPE_LENGTH (elttype) == 1
 319               && TYPE_CODE (elttype) == TYPE_CODE_INT
 320               && (options->format == 0 || options->format == 's')
 321               && addr != 0)
 322             i = val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
 323                                   stream, options);
 324
 325           /* Return number of characters printed, including the terminating
 326              '\0' if we reached the end.  val_print_string takes care including
 327              the terminating '\0' if necessary.  */
 328           return i;
 329         }
 330       break;
 331
 332     case TYPE_CODE_REF:
 333       elttype = check_typedef (TYPE_TARGET_TYPE (type));
 334       if (options->addressprint)
 335         {
 336           CORE_ADDR addr
 337             = extract_typed_address (valaddr + embedded_offset, type);
 338
 339           fprintf_filtered (stream, "@");
 340           fputs_filtered (paddress (gdbarch, addr), stream);
 341           if (options->deref_ref)
 342             fputs_filtered (": ", stream);
 343         }
 344       /* De-reference the reference.  */
 345       if (options->deref_ref)
 346         {
 347           if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
 348             {
 349               struct value *deref_val =
 350                 value_at
 351                 (TYPE_TARGET_TYPE (type),
 352                  unpack_pointer (type, valaddr + embedded_offset));
 353
 354               common_val_print (deref_val, stream, recurse,
 355                                 options, current_language);
 356             }
 357           else
 358             fputs_filtered ("???", stream);
 359         }
 360       break;
 361
 362     case TYPE_CODE_FUNC:
 363       if (options->format)
 364         {
 365           val_print_scalar_formatted (type, valaddr, embedded_offset,
 366                                       original_value, options, 0, stream);
 367           break;
 368         }
 369       /* FIXME, we should consider, at least for ANSI C language, eliminating
 370          the distinction made between FUNCs and POINTERs to FUNCs.  */
 371       fprintf_filtered (stream, "{");
 372       type_print (type, "", stream, -1);
 373       fprintf_filtered (stream, "} ");
 374       /* Try to print what function it points to, and its address.  */
 375       print_address_demangle (gdbarch, address, stream, demangle);
 376       break;
 377
 378     case TYPE_CODE_INT:
 379     case TYPE_CODE_CHAR:
 380       if (options->format || options->output_format)
 381         {
 382           struct value_print_options opts = *options;
 383
 384           opts.format = (options->format ? options->format
 385                          : options->output_format);
 386           val_print_scalar_formatted (type, valaddr, embedded_offset,
 387                                       original_value, options, 0, stream);
 388         }
 389       else
 390         {
 391           val_print_type_code_int (type, valaddr + embedded_offset, stream);
 392           /* C and C++ has no single byte int type, char is used instead.
 393              Since we don't know whether the value is really intended to
 394              be used as an integer or a character, print the character
 395              equivalent as well.  */
 396           if (TYPE_LENGTH (type) == 1 || TYPE_CODE (type) == TYPE_CODE_CHAR)
 397             {
 398               LONGEST c;
 399
 400               fputs_filtered (" ", stream);
 401               c = unpack_long (type, valaddr + embedded_offset);
 402               LA_PRINT_CHAR ((unsigned char) c, type, stream);
 403             }
 404         }
 405       break;
 406
 407     case TYPE_CODE_FLAGS:
 408       if (options->format)
 409         val_print_scalar_formatted (type, valaddr, embedded_offset,
 410                                     original_value, options, 0, stream);
 411       else
 412         val_print_type_code_flags (type, valaddr + embedded_offset, stream);
 413       break;
 414
 415     case TYPE_CODE_FLT:
 416       if (options->format)
 417         val_print_scalar_formatted (type, valaddr, embedded_offset,
 418                                     original_value, options, 0, stream);
 419       else
 420         print_floating (valaddr + embedded_offset, type, stream);
 421       break;
 422
 423     case TYPE_CODE_VOID:
 424       fprintf_filtered (stream, "VOID");
 425       break;
 426
 427     case TYPE_CODE_ERROR:
 428       fprintf_filtered (stream, "%s", TYPE_ERROR_NAME (type));
 429       break;
 430
 431     case TYPE_CODE_RANGE:
 432       /* FIXME, we should not ever have to print one of these yet.  */
 433       fprintf_filtered (stream, "<range type>");
 434       break;
 435
 436     case TYPE_CODE_BOOL:
 437       if (options->format || options->output_format)
 438         {
 439           struct value_print_options opts = *options;
 440
 441           opts.format = (options->format ? options->format
 442                          : options->output_format);
 443           val_print_scalar_formatted (type, valaddr, embedded_offset,
 444                                       original_value, &opts, 0, stream);
 445         }
 446       else
 447         {
 448           val = extract_unsigned_integer (valaddr + embedded_offset,
 449                                           TYPE_LENGTH (type), byte_order);
 450           if (val == 0)
 451             fprintf_filtered (stream, ".FALSE.");
 452           else if (val == 1)
 453             fprintf_filtered (stream, ".TRUE.");
 454           else
 455             /* Not a legitimate logical type, print as an integer.  */
 456             {
 457               /* Bash the type code temporarily.  */
 458               TYPE_CODE (type) = TYPE_CODE_INT;
 459               val_print (type, valaddr, embedded_offset,
 460                          address, stream, recurse,
 461                          original_value, options, current_language);
 462               /* Restore the type code so later uses work as intended.  */
 463               TYPE_CODE (type) = TYPE_CODE_BOOL;
 464             }
 465         }
 466       break;
 467
 468     case TYPE_CODE_COMPLEX:
 469       type = TYPE_TARGET_TYPE (type);
 470       fputs_filtered ("(", stream);
 471       print_floating (valaddr + embedded_offset, type, stream);
 472       fputs_filtered (",", stream);
 473       print_floating (valaddr + embedded_offset + TYPE_LENGTH (type),
 474                       type, stream);
 475       fputs_filtered (")", stream);
 476       break;
 477
 478     case TYPE_CODE_UNDEF:
 479       /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
 480          dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
 481          and no complete type for struct foo in that file.  */
 482       fprintf_filtered (stream, "<incomplete type>");
 483       break;
 484
 485     case TYPE_CODE_STRUCT:
 486     case TYPE_CODE_UNION:
 487       /* Starting from the Fortran 90 standard, Fortran supports derived
 488          types.  */
 489       fprintf_filtered (stream, "( ");
 490       for (index = 0; index < TYPE_NFIELDS (type); index++)
 491         {
 492           int offset = TYPE_FIELD_BITPOS (type, index) / 8;
 493
 494           val_print (TYPE_FIELD_TYPE (type, index), valaddr,
 495                      embedded_offset + offset,
 496                      address, stream, recurse + 1,
 497                      original_value, options, current_language);
 498           if (index != TYPE_NFIELDS (type) - 1)
 499             fputs_filtered (", ", stream);
 500         }
 501       fprintf_filtered (stream, " )");
 502       break;
 503
 504     default:
 505       error (_("Invalid F77 type code %d in symbol table."), TYPE_CODE (type));
 506     }
 507   gdb_flush (stream);
 508   return 0;
 509 }
 510
 511 static void
 512 list_all_visible_commons (char *funname)
 513 {
 514   SAVED_F77_COMMON_PTR tmp;
 515
 516   tmp = head_common_list;
 517
 518   printf_filtered (_("All COMMON blocks visible at this level:\n\n"));
 519
 520   while (tmp != NULL)
 521     {
 522       if (strcmp (tmp->owning_function, funname) == 0)
 523         printf_filtered ("%s\n", tmp->name);
 524
 525       tmp = tmp->next;
 526     }
 527 }
 528
 529 /* This function is used to print out the values in a given COMMON
 530    block.  It will always use the most local common block of the
 531    given name.  */
 532
 533 static void
 534 info_common_command (char *comname, int from_tty)
 535 {
 536   SAVED_F77_COMMON_PTR the_common;
 537   COMMON_ENTRY_PTR entry;
 538   struct frame_info *fi;
 539   char *funname = 0;
 540   struct symbol *func;
 541
 542   /* We have been told to display the contents of F77 COMMON
 543      block supposedly visible in this function.  Let us
 544      first make sure that it is visible and if so, let
 545      us display its contents.  */
 546
 547   fi = get_selected_frame (_("No frame selected"));
 548
 549   /* The following is generally ripped off from stack.c's routine
 550      print_frame_info().  */
 551
 552   func = find_pc_function (get_frame_pc (fi));
 553   if (func)
 554     {
 555       /* In certain pathological cases, the symtabs give the wrong
 556          function (when we are in the first function in a file which
 557          is compiled without debugging symbols, the previous function
 558          is compiled with debugging symbols, and the "foo.o" symbol
 559          that is supposed to tell us where the file with debugging symbols
 560          ends has been truncated by ar because it is longer than 15
 561          characters).
 562
 563          So look in the minimal symbol tables as well, and if it comes
 564          up with a larger address for the function use that instead.
 565          I don't think this can ever cause any problems; there shouldn't
 566          be any minimal symbols in the middle of a function.
 567          FIXME:  (Not necessarily true.  What about text labels?)  */
 568
 569       struct minimal_symbol *msymbol =
 570         lookup_minimal_symbol_by_pc (get_frame_pc (fi));
 571
 572       if (msymbol != NULL
 573           && (SYMBOL_VALUE_ADDRESS (msymbol)
 574               > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
 575         funname = SYMBOL_LINKAGE_NAME (msymbol);
 576       else
 577         funname = SYMBOL_LINKAGE_NAME (func);
 578     }
 579   else
 580     {
 581       struct minimal_symbol *msymbol =
 582         lookup_minimal_symbol_by_pc (get_frame_pc (fi));
 583
 584       if (msymbol != NULL)
 585         funname = SYMBOL_LINKAGE_NAME (msymbol);
 586       else /* Got no 'funname', code below will fail.  */
 587         error (_("No function found for frame."));
 588     }
 589
 590   /* If comname is NULL, we assume the user wishes to see the
 591      which COMMON blocks are visible here and then return.  */
 592
 593   if (comname == 0)
 594     {
 595       list_all_visible_commons (funname);
 596       return;
 597     }
 598
 599   the_common = find_common_for_function (comname, funname);
 600
 601   if (the_common)
 602     {
 603       if (strcmp (comname, BLANK_COMMON_NAME_LOCAL) == 0)
 604         printf_filtered (_("Contents of blank COMMON block:\n"));
 605       else
 606         printf_filtered (_("Contents of F77 COMMON block '%s':\n"), comname);
 607
 608       printf_filtered ("\n");
 609       entry = the_common->entries;
 610
 611       while (entry != NULL)
 612         {
 613           print_variable_and_value (NULL, entry->symbol, fi, gdb_stdout, 0);
 614           entry = entry->next;
 615         }
 616     }
 617   else
 618     printf_filtered (_("Cannot locate the common block %s in function '%s'\n"),
 619                      comname, funname);
 620 }
 621
 622 /* This function is used to determine whether there is a
 623    F77 common block visible at the current scope called 'comname'.  */
 624
 625 #if 0
 626 static int
 627 there_is_a_visible_common_named (char *comname)
 628 {
 629   SAVED_F77_COMMON_PTR the_common;
 630   struct frame_info *fi;
 631   char *funname = 0;
 632   struct symbol *func;
 633
 634   if (comname == NULL)
 635     error (_("Cannot deal with NULL common name!"));
 636
 637   fi = get_selected_frame (_("No frame selected"));
 638
 639   /* The following is generally ripped off from stack.c's routine
 640      print_frame_info().  */
 641
 642   func = find_pc_function (fi->pc);
 643   if (func)
 644     {
 645       /* In certain pathological cases, the symtabs give the wrong
 646          function (when we are in the first function in a file which
 647          is compiled without debugging symbols, the previous function
 648          is compiled with debugging symbols, and the "foo.o" symbol
 649          that is supposed to tell us where the file with debugging symbols
 650          ends has been truncated by ar because it is longer than 15
 651          characters).
 652
 653          So look in the minimal symbol tables as well, and if it comes
 654          up with a larger address for the function use that instead.
 655          I don't think this can ever cause any problems; there shouldn't
 656          be any minimal symbols in the middle of a function.
 657          FIXME:  (Not necessarily true.  What about text labels?)  */
 658
 659       struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (fi->pc);
 660
 661       if (msymbol != NULL
 662           && (SYMBOL_VALUE_ADDRESS (msymbol)
 663               > BLOCK_START (SYMBOL_BLOCK_VALUE (func))))
 664         funname = SYMBOL_LINKAGE_NAME (msymbol);
 665       else
 666         funname = SYMBOL_LINKAGE_NAME (func);
 667     }
 668   else
 669     {
 670       struct minimal_symbol *msymbol =
 671         lookup_minimal_symbol_by_pc (fi->pc);
 672
 673       if (msymbol != NULL)
 674         funname = SYMBOL_LINKAGE_NAME (msymbol);
 675     }
 676
 677   the_common = find_common_for_function (comname, funname);
 678
 679   return (the_common ? 1 : 0);
 680 }
 681 #endif
 682
 683 void
 684 _initialize_f_valprint (void)
 685 {
 686   add_info ("common", info_common_command,
 687             _("Print out the values contained in a Fortran COMMON block."));
 688   if (xdb_commands)
 689     add_com ("lc", class_info, info_common_command,
 690              _("Print out the values contained in a Fortran COMMON block."));
 691 }