gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2
   3    Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003,
   4    2004, 2005, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   5
   6    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   7    (fmbutt@engage.sps.mot.com).
   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 "parser-defs.h"
  30 #include "language.h"
  31 #include "f-lang.h"
  32 #include "valprint.h"
  33 #include "value.h"
  34 #include "cp-support.h"
  35 #include "charset.h"
  36
  37
  38 /* Following is dubious stuff that had been in the xcoff reader.  */
  39
  40 struct saved_fcn
  41   {
  42     long line_offset;           /* Line offset for function.  */
  43     struct saved_fcn *next;
  44   };
  45
  46
  47 struct saved_bf_symnum
  48   {
  49     long symnum_fcn;            /* Symnum of function (i.e. .function
  50                                    directive).  */
  51     long symnum_bf;             /* Symnum of .bf for this function.  */
  52     struct saved_bf_symnum *next;
  53   };
  54
  55 typedef struct saved_fcn SAVED_FUNCTION, *SAVED_FUNCTION_PTR;
  56 typedef struct saved_bf_symnum SAVED_BF, *SAVED_BF_PTR;
  57
  58 /* Local functions */
  59
  60 extern void _initialize_f_language (void);
  61 #if 0
  62 static void clear_function_list (void);
  63 static long get_bf_for_fcn (long);
  64 static void clear_bf_list (void);
  65 static void patch_all_commons_by_name (char *, CORE_ADDR, int);
  66 static SAVED_F77_COMMON_PTR find_first_common_named (char *);
  67 static void add_common_entry (struct symbol *);
  68 static void add_common_block (char *, CORE_ADDR, int, char *);
  69 static SAVED_FUNCTION *allocate_saved_function_node (void);
  70 static SAVED_BF_PTR allocate_saved_bf_node (void);
  71 static COMMON_ENTRY_PTR allocate_common_entry_node (void);
  72 static SAVED_F77_COMMON_PTR allocate_saved_f77_common_node (void);
  73 static void patch_common_entries (SAVED_F77_COMMON_PTR, CORE_ADDR, int);
  74 #endif
  75
  76 static void f_printchar (int c, struct type *type, struct ui_file * stream);
  77 static void f_emit_char (int c, struct type *type,
  78                          struct ui_file * stream, int quoter);
  79
  80 /* Return the encoding that should be used for the character type
  81    TYPE.  */
  82
  83 static const char *
  84 f_get_encoding (struct type *type)
  85 {
  86   const char *encoding;
  87
  88   switch (TYPE_LENGTH (type))
  89     {
  90     case 1:
  91       encoding = target_charset (get_type_arch (type));
  92       break;
  93     case 4:
  94       if (gdbarch_byte_order (get_type_arch (type)) == BFD_ENDIAN_BIG)
  95         encoding = "UTF-32BE";
  96       else
  97         encoding = "UTF-32LE";
  98       break;
  99
 100     default:
 101       error (_("unrecognized character type"));
 102     }
 103
 104   return encoding;
 105 }
 106
 107 /* Print the character C on STREAM as part of the contents of a literal
 108    string whose delimiter is QUOTER.  Note that that format for printing
 109    characters and strings is language specific.
 110    FIXME:  This is a copy of the same function from c-exp.y.  It should
 111    be replaced with a true F77 version.  */
 112
 113 static void
 114 f_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
 115 {
 116   const char *encoding = f_get_encoding (type);
 117
 118   generic_emit_char (c, type, stream, quoter, encoding);
 119 }
 120
 121 /* Implementation of la_printchar.  */
 122
 123 static void
 124 f_printchar (int c, struct type *type, struct ui_file *stream)
 125 {
 126   fputs_filtered ("'", stream);
 127   LA_EMIT_CHAR (c, type, stream, '\'');
 128   fputs_filtered ("'", stream);
 129 }
 130
 131 /* Print the character string STRING, printing at most LENGTH characters.
 132    Printing stops early if the number hits print_max; repeat counts
 133    are printed as appropriate.  Print ellipses at the end if we
 134    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
 135    FIXME:  This is a copy of the same function from c-exp.y.  It should
 136    be replaced with a true F77 version.  */
 137
 138 static void
 139 f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
 140             unsigned int length, const char *encoding, int force_ellipses,
 141             const struct value_print_options *options)
 142 {
 143   const char *type_encoding = f_get_encoding (type);
 144
 145   if (TYPE_LENGTH (type) == 4)
 146     fputs_filtered ("4_", stream);
 147
 148   if (!encoding || !*encoding)
 149     encoding = type_encoding;
 150
 151   generic_printstr (stream, type, string, length, encoding,
 152                     force_ellipses, '\'', 0, options);
 153 }
 154 \f
 155
 156 /* Table of operators and their precedences for printing expressions.  */
 157
 158 static const struct op_print f_op_print_tab[] =
 159 {
 160   {"+", BINOP_ADD, PREC_ADD, 0},
 161   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 162   {"-", BINOP_SUB, PREC_ADD, 0},
 163   {"-", UNOP_NEG, PREC_PREFIX, 0},
 164   {"*", BINOP_MUL, PREC_MUL, 0},
 165   {"/", BINOP_DIV, PREC_MUL, 0},
 166   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 167   {"MOD", BINOP_REM, PREC_MUL, 0},
 168   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 169   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 170   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 171   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 172   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 173   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 174   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 175   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 176   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 177   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 178   {"**", UNOP_IND, PREC_PREFIX, 0},
 179   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 180   {NULL, 0, 0, 0}
 181 };
 182 \f
 183 enum f_primitive_types {
 184   f_primitive_type_character,
 185   f_primitive_type_logical,
 186   f_primitive_type_logical_s1,
 187   f_primitive_type_logical_s2,
 188   f_primitive_type_logical_s8,
 189   f_primitive_type_integer,
 190   f_primitive_type_integer_s2,
 191   f_primitive_type_real,
 192   f_primitive_type_real_s8,
 193   f_primitive_type_real_s16,
 194   f_primitive_type_complex_s8,
 195   f_primitive_type_complex_s16,
 196   f_primitive_type_void,
 197   nr_f_primitive_types
 198 };
 199
 200 static void
 201 f_language_arch_info (struct gdbarch *gdbarch,
 202                       struct language_arch_info *lai)
 203 {
 204   const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
 205
 206   lai->string_char_type = builtin->builtin_character;
 207   lai->primitive_type_vector
 208     = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
 209                               struct type *);
 210
 211   lai->primitive_type_vector [f_primitive_type_character]
 212     = builtin->builtin_character;
 213   lai->primitive_type_vector [f_primitive_type_logical]
 214     = builtin->builtin_logical;
 215   lai->primitive_type_vector [f_primitive_type_logical_s1]
 216     = builtin->builtin_logical_s1;
 217   lai->primitive_type_vector [f_primitive_type_logical_s2]
 218     = builtin->builtin_logical_s2;
 219   lai->primitive_type_vector [f_primitive_type_logical_s8]
 220     = builtin->builtin_logical_s8;
 221   lai->primitive_type_vector [f_primitive_type_real]
 222     = builtin->builtin_real;
 223   lai->primitive_type_vector [f_primitive_type_real_s8]
 224     = builtin->builtin_real_s8;
 225   lai->primitive_type_vector [f_primitive_type_real_s16]
 226     = builtin->builtin_real_s16;
 227   lai->primitive_type_vector [f_primitive_type_complex_s8]
 228     = builtin->builtin_complex_s8;
 229   lai->primitive_type_vector [f_primitive_type_complex_s16]
 230     = builtin->builtin_complex_s16;
 231   lai->primitive_type_vector [f_primitive_type_void]
 232     = builtin->builtin_void;
 233
 234   lai->bool_type_symbol = "logical";
 235   lai->bool_type_default = builtin->builtin_logical_s2;
 236 }
 237
 238 /* Remove the modules separator :: from the default break list.  */
 239
 240 static char *
 241 f_word_break_characters (void)
 242 {
 243   static char *retval;
 244
 245   if (!retval)
 246     {
 247       char *s;
 248
 249       retval = xstrdup (default_word_break_characters ());
 250       s = strchr (retval, ':');
 251       if (s)
 252         {
 253           char *last_char = &s[strlen (s) - 1];
 254
 255           *s = *last_char;
 256           *last_char = 0;
 257         }
 258     }
 259   return retval;
 260 }
 261
 262 /* Consider the modules separator :: as a valid symbol name character
 263    class.  */
 264
 265 static char **
 266 f_make_symbol_completion_list (char *text, char *word)
 267 {
 268   return default_make_symbol_completion_list_break_on (text, word, ":");
 269 }
 270
 271 /* This is declared in c-lang.h but it is silly to import that file for what
 272    is already just a hack.  */
 273 extern int c_value_print (struct value *, struct ui_file *,
 274                           const struct value_print_options *);
 275
 276 const struct language_defn f_language_defn =
 277 {
 278   "fortran",
 279   language_fortran,
 280   range_check_on,
 281   type_check_on,
 282   case_sensitive_off,
 283   array_column_major,
 284   macro_expansion_no,
 285   &exp_descriptor_standard,
 286   f_parse,                      /* parser */
 287   f_error,                      /* parser error function */
 288   null_post_parser,
 289   f_printchar,                  /* Print character constant */
 290   f_printstr,                   /* function to print string constant */
 291   f_emit_char,                  /* Function to print a single character */
 292   f_print_type,                 /* Print a type using appropriate syntax */
 293   default_print_typedef,        /* Print a typedef using appropriate syntax */
 294   f_val_print,                  /* Print a value using appropriate syntax */
 295   c_value_print,                /* FIXME */
 296   NULL,                         /* Language specific skip_trampoline */
 297   NULL,                         /* name_of_this */
 298   cp_lookup_symbol_nonlocal,    /* lookup_symbol_nonlocal */
 299   basic_lookup_transparent_type,/* lookup_transparent_type */
 300   NULL,                         /* Language specific symbol demangler */
 301   NULL,                         /* Language specific
 302                                    class_name_from_physname */
 303   f_op_print_tab,               /* expression operators for printing */
 304   0,                            /* arrays are first-class (not c-style) */
 305   1,                            /* String lower bound */
 306   f_word_break_characters,
 307   f_make_symbol_completion_list,
 308   f_language_arch_info,
 309   default_print_array_index,
 310   default_pass_by_reference,
 311   default_get_string,
 312   LANG_MAGIC
 313 };
 314
 315 static void *
 316 build_fortran_types (struct gdbarch *gdbarch)
 317 {
 318   struct builtin_f_type *builtin_f_type
 319     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 320
 321   builtin_f_type->builtin_void
 322     = arch_type (gdbarch, TYPE_CODE_VOID, 1, "VOID");
 323
 324   builtin_f_type->builtin_character
 325     = arch_integer_type (gdbarch, TARGET_CHAR_BIT, 0, "character");
 326
 327   builtin_f_type->builtin_logical_s1
 328     = arch_boolean_type (gdbarch, TARGET_CHAR_BIT, 1, "logical*1");
 329
 330   builtin_f_type->builtin_integer_s2
 331     = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), 0,
 332                          "integer*2");
 333
 334   builtin_f_type->builtin_logical_s2
 335     = arch_boolean_type (gdbarch, gdbarch_short_bit (gdbarch), 1,
 336                          "logical*2");
 337
 338   builtin_f_type->builtin_logical_s8
 339     = arch_boolean_type (gdbarch, gdbarch_long_long_bit (gdbarch), 1,
 340                          "logical*8");
 341
 342   builtin_f_type->builtin_integer
 343     = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0,
 344                          "integer");
 345
 346   builtin_f_type->builtin_logical
 347     = arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1,
 348                          "logical*4");
 349
 350   builtin_f_type->builtin_real
 351     = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
 352                        "real", NULL);
 353   builtin_f_type->builtin_real_s8
 354     = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
 355                        "real*8", NULL);
 356   builtin_f_type->builtin_real_s16
 357     = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
 358                        "real*16", NULL);
 359
 360   builtin_f_type->builtin_complex_s8
 361     = arch_complex_type (gdbarch, "complex*8",
 362                          builtin_f_type->builtin_real);
 363   builtin_f_type->builtin_complex_s16
 364     = arch_complex_type (gdbarch, "complex*16",
 365                          builtin_f_type->builtin_real_s8);
 366   builtin_f_type->builtin_complex_s32
 367     = arch_complex_type (gdbarch, "complex*32",
 368                          builtin_f_type->builtin_real_s16);
 369
 370   return builtin_f_type;
 371 }
 372
 373 static struct gdbarch_data *f_type_data;
 374
 375 const struct builtin_f_type *
 376 builtin_f_type (struct gdbarch *gdbarch)
 377 {
 378   return gdbarch_data (gdbarch, f_type_data);
 379 }
 380
 381 void
 382 _initialize_f_language (void)
 383 {
 384   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 385
 386   add_language (&f_language_defn);
 387 }
 388
 389 #if 0
 390 static SAVED_BF_PTR
 391 allocate_saved_bf_node (void)
 392 {
 393   SAVED_BF_PTR new;
 394
 395   new = (SAVED_BF_PTR) xmalloc (sizeof (SAVED_BF));
 396   return (new);
 397 }
 398
 399 static SAVED_FUNCTION *
 400 allocate_saved_function_node (void)
 401 {
 402   SAVED_FUNCTION *new;
 403
 404   new = (SAVED_FUNCTION *) xmalloc (sizeof (SAVED_FUNCTION));
 405   return (new);
 406 }
 407
 408 static SAVED_F77_COMMON_PTR
 409 allocate_saved_f77_common_node (void)
 410 {
 411   SAVED_F77_COMMON_PTR new;
 412
 413   new = (SAVED_F77_COMMON_PTR) xmalloc (sizeof (SAVED_F77_COMMON));
 414   return (new);
 415 }
 416
 417 static COMMON_ENTRY_PTR
 418 allocate_common_entry_node (void)
 419 {
 420   COMMON_ENTRY_PTR new;
 421
 422   new = (COMMON_ENTRY_PTR) xmalloc (sizeof (COMMON_ENTRY));
 423   return (new);
 424 }
 425 #endif
 426
 427 SAVED_F77_COMMON_PTR head_common_list = NULL;   /* Ptr to 1st saved COMMON  */
 428 SAVED_F77_COMMON_PTR tail_common_list = NULL;   /* Ptr to last saved COMMON  */
 429 SAVED_F77_COMMON_PTR current_common = NULL;     /* Ptr to current COMMON */
 430
 431 #if 0
 432 static SAVED_BF_PTR saved_bf_list = NULL;       /* Ptr to (.bf,function)
 433                                                    list */
 434 static SAVED_BF_PTR saved_bf_list_end = NULL;   /* Ptr to above list's end */
 435 static SAVED_BF_PTR current_head_bf_list = NULL;    /* Current head of
 436                                                        above list.  */
 437
 438 static SAVED_BF_PTR tmp_bf_ptr; /* Generic temporary for use
 439                                    in macros.  */
 440
 441 /* The following function simply enters a given common block onto
 442    the global common block chain.  */
 443
 444 static void
 445 add_common_block (char *name, CORE_ADDR offset, int secnum, char *func_stab)
 446 {
 447   SAVED_F77_COMMON_PTR tmp;
 448   char *c, *local_copy_func_stab;
 449
 450   /* If the COMMON block we are trying to add has a blank
 451      name (i.e. "#BLNK_COM") then we set it to __BLANK
 452      because the darn "#" character makes GDB's input
 453      parser have fits.  */
 454
 455
 456   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 457       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 458     {
 459
 460       xfree (name);
 461       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 462       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 463     }
 464
 465   tmp = allocate_saved_f77_common_node ();
 466
 467   local_copy_func_stab = xmalloc (strlen (func_stab) + 1);
 468   strcpy (local_copy_func_stab, func_stab);
 469
 470   tmp->name = xmalloc (strlen (name) + 1);
 471
 472   /* local_copy_func_stab is a stabstring, let us first extract the
 473      function name from the stab by NULLing out the ':' character.  */
 474
 475
 476   c = NULL;
 477   c = strchr (local_copy_func_stab, ':');
 478
 479   if (c)
 480     *c = '\0';
 481   else
 482     error (_("Malformed function STAB found in add_common_block()"));
 483
 484
 485   tmp->owning_function = xmalloc (strlen (local_copy_func_stab) + 1);
 486
 487   strcpy (tmp->owning_function, local_copy_func_stab);
 488
 489   strcpy (tmp->name, name);
 490   tmp->offset = offset;
 491   tmp->next = NULL;
 492   tmp->entries = NULL;
 493   tmp->secnum = secnum;
 494
 495   current_common = tmp;
 496
 497   if (head_common_list == NULL)
 498     {
 499       head_common_list = tail_common_list = tmp;
 500     }
 501   else
 502     {
 503       tail_common_list->next = tmp;
 504       tail_common_list = tmp;
 505     }
 506 }
 507 #endif
 508
 509 /* The following function simply enters a given common entry onto
 510    the "current_common" block that has been saved away.  */
 511
 512 #if 0
 513 static void
 514 add_common_entry (struct symbol *entry_sym_ptr)
 515 {
 516   COMMON_ENTRY_PTR tmp;
 517
 518
 519
 520   /* The order of this list is important, since
 521      we expect the entries to appear in decl.
 522      order when we later issue "info common" calls.  */
 523
 524   tmp = allocate_common_entry_node ();
 525
 526   tmp->next = NULL;
 527   tmp->symbol = entry_sym_ptr;
 528
 529   if (current_common == NULL)
 530     error (_("Attempt to add COMMON entry with no block open!"));
 531   else
 532     {
 533       if (current_common->entries == NULL)
 534         {
 535           current_common->entries = tmp;
 536           current_common->end_of_entries = tmp;
 537         }
 538       else
 539         {
 540           current_common->end_of_entries->next = tmp;
 541           current_common->end_of_entries = tmp;
 542         }
 543     }
 544 }
 545 #endif
 546
 547 /* This routine finds the first encountred COMMON block named "name".  */
 548
 549 #if 0
 550 static SAVED_F77_COMMON_PTR
 551 find_first_common_named (char *name)
 552 {
 553
 554   SAVED_F77_COMMON_PTR tmp;
 555
 556   tmp = head_common_list;
 557
 558   while (tmp != NULL)
 559     {
 560       if (strcmp (tmp->name, name) == 0)
 561         return (tmp);
 562       else
 563         tmp = tmp->next;
 564     }
 565   return (NULL);
 566 }
 567 #endif
 568
 569 /* This routine finds the first encountred COMMON block named "name"
 570    that belongs to function funcname.  */
 571
 572 SAVED_F77_COMMON_PTR
 573 find_common_for_function (char *name, char *funcname)
 574 {
 575
 576   SAVED_F77_COMMON_PTR tmp;
 577
 578   tmp = head_common_list;
 579
 580   while (tmp != NULL)
 581     {
 582       if (strcmp (tmp->name, name) == 0
 583           && strcmp (tmp->owning_function, funcname) == 0)
 584         return (tmp);
 585       else
 586         tmp = tmp->next;
 587     }
 588   return (NULL);
 589 }
 590
 591
 592 #if 0
 593
 594 /* The following function is called to patch up the offsets
 595    for the statics contained in the COMMON block named
 596    "name."  */
 597
 598 static void
 599 patch_common_entries (SAVED_F77_COMMON_PTR blk, CORE_ADDR offset, int secnum)
 600 {
 601   COMMON_ENTRY_PTR entry;
 602
 603   blk->offset = offset;         /* Keep this around for future use.  */
 604
 605   entry = blk->entries;
 606
 607   while (entry != NULL)
 608     {
 609       SYMBOL_VALUE (entry->symbol) += offset;
 610       SYMBOL_SECTION (entry->symbol) = secnum;
 611
 612       entry = entry->next;
 613     }
 614   blk->secnum = secnum;
 615 }
 616
 617 /* Patch all commons named "name" that need patching.Since COMMON
 618    blocks occur with relative infrequency, we simply do a linear scan on
 619    the name.  Eventually, the best way to do this will be a
 620    hashed-lookup.  Secnum is the section number for the .bss section
 621    (which is where common data lives).  */
 622
 623 static void
 624 patch_all_commons_by_name (char *name, CORE_ADDR offset, int secnum)
 625 {
 626
 627   SAVED_F77_COMMON_PTR tmp;
 628
 629   /* For blank common blocks, change the canonical reprsentation
 630      of a blank name */
 631
 632   if (strcmp (name, BLANK_COMMON_NAME_ORIGINAL) == 0
 633       || strcmp (name, BLANK_COMMON_NAME_MF77) == 0)
 634     {
 635       xfree (name);
 636       name = alloca (strlen (BLANK_COMMON_NAME_LOCAL) + 1);
 637       strcpy (name, BLANK_COMMON_NAME_LOCAL);
 638     }
 639
 640   tmp = head_common_list;
 641
 642   while (tmp != NULL)
 643     {
 644       if (COMMON_NEEDS_PATCHING (tmp))
 645         if (strcmp (tmp->name, name) == 0)
 646           patch_common_entries (tmp, offset, secnum);
 647
 648       tmp = tmp->next;
 649     }
 650 }
 651 #endif
 652
 653 /* This macro adds the symbol-number for the start of the function
 654    (the symbol number of the .bf) referenced by symnum_fcn to a
 655    list.  This list, in reality should be a FIFO queue but since
 656    #line pragmas sometimes cause line ranges to get messed up
 657    we simply create a linear list.  This list can then be searched
 658    first by a queueing algorithm and upon failure fall back to
 659    a linear scan.  */
 660
 661 #if 0
 662 #define ADD_BF_SYMNUM(bf_sym,fcn_sym) \
 663   \
 664   if (saved_bf_list == NULL) \
 665 { \
 666     tmp_bf_ptr = allocate_saved_bf_node(); \
 667       \
 668         tmp_bf_ptr->symnum_bf = (bf_sym); \
 669           tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 670             tmp_bf_ptr->next = NULL; \
 671               \
 672                 current_head_bf_list = saved_bf_list = tmp_bf_ptr; \
 673                   saved_bf_list_end = tmp_bf_ptr; \
 674                   } \
 675 else \
 676 {  \
 677      tmp_bf_ptr = allocate_saved_bf_node(); \
 678        \
 679          tmp_bf_ptr->symnum_bf = (bf_sym);  \
 680            tmp_bf_ptr->symnum_fcn = (fcn_sym);  \
 681              tmp_bf_ptr->next = NULL;  \
 682                \
 683                  saved_bf_list_end->next = tmp_bf_ptr;  \
 684                    saved_bf_list_end = tmp_bf_ptr; \
 685                    }
 686 #endif
 687
 688 /* This function frees the entire (.bf,function) list.  */
 689
 690 #if 0
 691 static void
 692 clear_bf_list (void)
 693 {
 694
 695   SAVED_BF_PTR tmp = saved_bf_list;
 696   SAVED_BF_PTR next = NULL;
 697
 698   while (tmp != NULL)
 699     {
 700       next = tmp->next;
 701       xfree (tmp);
 702       tmp = next;
 703     }
 704   saved_bf_list = NULL;
 705 }
 706 #endif
 707
 708 int global_remote_debug;
 709
 710 #if 0
 711
 712 static long
 713 get_bf_for_fcn (long the_function)
 714 {
 715   SAVED_BF_PTR tmp;
 716   int nprobes = 0;
 717
 718   /* First use a simple queuing algorithm (i.e. look and see if the
 719      item at the head of the queue is the one you want).  */
 720
 721   if (saved_bf_list == NULL)
 722     internal_error (__FILE__, __LINE__,
 723                     _("cannot get .bf node off empty list"));
 724
 725   if (current_head_bf_list != NULL)
 726     if (current_head_bf_list->symnum_fcn == the_function)
 727       {
 728         if (global_remote_debug)
 729           fprintf_unfiltered (gdb_stderr, "*");
 730
 731         tmp = current_head_bf_list;
 732         current_head_bf_list = current_head_bf_list->next;
 733         return (tmp->symnum_bf);
 734       }
 735
 736   /* If the above did not work (probably because #line directives were
 737      used in the sourcefile and they messed up our internal tables) we now do
 738      the ugly linear scan.  */
 739
 740   if (global_remote_debug)
 741     fprintf_unfiltered (gdb_stderr, "\ndefaulting to linear scan\n");
 742
 743   nprobes = 0;
 744   tmp = saved_bf_list;
 745   while (tmp != NULL)
 746     {
 747       nprobes++;
 748       if (tmp->symnum_fcn == the_function)
 749         {
 750           if (global_remote_debug)
 751             fprintf_unfiltered (gdb_stderr, "Found in %d probes\n", nprobes);
 752           current_head_bf_list = tmp->next;
 753           return (tmp->symnum_bf);
 754         }
 755       tmp = tmp->next;
 756     }
 757
 758   return (-1);
 759 }
 760
 761 static SAVED_FUNCTION_PTR saved_function_list = NULL;
 762 static SAVED_FUNCTION_PTR saved_function_list_end = NULL;
 763
 764 static void
 765 clear_function_list (void)
 766 {
 767   SAVED_FUNCTION_PTR tmp = saved_function_list;
 768   SAVED_FUNCTION_PTR next = NULL;
 769
 770   while (tmp != NULL)
 771     {
 772       next = tmp->next;
 773       xfree (tmp);
 774       tmp = next;
 775     }
 776
 777   saved_function_list = NULL;
 778 }
 779 #endif