gdb/f-lang.c

   1 /* Fortran language support routines for GDB, the GNU debugger.
   2
   3    Copyright (C) 1993-2017 Free Software Foundation, Inc.
   4
   5    Contributed by Motorola.  Adapted from the C parser by Farooq Butt
   6    (fmbutt@engage.sps.mot.com).
   7
   8    This file is part of GDB.
   9
  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.
  14
  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.
  19
  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/>.  */
  22
  23 #include "defs.h"
  24 #include "symtab.h"
  25 #include "gdbtypes.h"
  26 #include "expression.h"
  27 #include "parser-defs.h"
  28 #include "language.h"
  29 #include "varobj.h"
  30 #include "f-lang.h"
  31 #include "valprint.h"
  32 #include "value.h"
  33 #include "cp-support.h"
  34 #include "charset.h"
  35 #include "c-lang.h"
  36
  37
  38 /* Local functions */
  39
  40 static void f_printchar (int c, struct type *type, struct ui_file * stream);
  41 static void f_emit_char (int c, struct type *type,
  42                          struct ui_file * stream, int quoter);
  43
  44 /* Return the encoding that should be used for the character type
  45    TYPE.  */
  46
  47 static const char *
  48 f_get_encoding (struct type *type)
  49 {
  50   const char *encoding;
  51
  52   switch (TYPE_LENGTH (type))
  53     {
  54     case 1:
  55       encoding = target_charset (get_type_arch (type));
  56       break;
  57     case 4:
  58       if (gdbarch_byte_order (get_type_arch (type)) == BFD_ENDIAN_BIG)
  59         encoding = "UTF-32BE";
  60       else
  61         encoding = "UTF-32LE";
  62       break;
  63
  64     default:
  65       error (_("unrecognized character type"));
  66     }
  67
  68   return encoding;
  69 }
  70
  71 /* Print the character C on STREAM as part of the contents of a literal
  72    string whose delimiter is QUOTER.  Note that that format for printing
  73    characters and strings is language specific.
  74    FIXME:  This is a copy of the same function from c-exp.y.  It should
  75    be replaced with a true F77 version.  */
  76
  77 static void
  78 f_emit_char (int c, struct type *type, struct ui_file *stream, int quoter)
  79 {
  80   const char *encoding = f_get_encoding (type);
  81
  82   generic_emit_char (c, type, stream, quoter, encoding);
  83 }
  84
  85 /* Implementation of la_printchar.  */
  86
  87 static void
  88 f_printchar (int c, struct type *type, struct ui_file *stream)
  89 {
  90   fputs_filtered ("'", stream);
  91   LA_EMIT_CHAR (c, type, stream, '\'');
  92   fputs_filtered ("'", stream);
  93 }
  94
  95 /* Print the character string STRING, printing at most LENGTH characters.
  96    Printing stops early if the number hits print_max; repeat counts
  97    are printed as appropriate.  Print ellipses at the end if we
  98    had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
  99    FIXME:  This is a copy of the same function from c-exp.y.  It should
 100    be replaced with a true F77 version.  */
 101
 102 static void
 103 f_printstr (struct ui_file *stream, struct type *type, const gdb_byte *string,
 104             unsigned int length, const char *encoding, int force_ellipses,
 105             const struct value_print_options *options)
 106 {
 107   const char *type_encoding = f_get_encoding (type);
 108
 109   if (TYPE_LENGTH (type) == 4)
 110     fputs_filtered ("4_", stream);
 111
 112   if (!encoding || !*encoding)
 113     encoding = type_encoding;
 114
 115   generic_printstr (stream, type, string, length, encoding,
 116                     force_ellipses, '\'', 0, options);
 117 }
 118 \f
 119
 120 /* Table of operators and their precedences for printing expressions.  */
 121
 122 static const struct op_print f_op_print_tab[] =
 123 {
 124   {"+", BINOP_ADD, PREC_ADD, 0},
 125   {"+", UNOP_PLUS, PREC_PREFIX, 0},
 126   {"-", BINOP_SUB, PREC_ADD, 0},
 127   {"-", UNOP_NEG, PREC_PREFIX, 0},
 128   {"*", BINOP_MUL, PREC_MUL, 0},
 129   {"/", BINOP_DIV, PREC_MUL, 0},
 130   {"DIV", BINOP_INTDIV, PREC_MUL, 0},
 131   {"MOD", BINOP_REM, PREC_MUL, 0},
 132   {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
 133   {".OR.", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
 134   {".AND.", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
 135   {".NOT.", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
 136   {".EQ.", BINOP_EQUAL, PREC_EQUAL, 0},
 137   {".NE.", BINOP_NOTEQUAL, PREC_EQUAL, 0},
 138   {".LE.", BINOP_LEQ, PREC_ORDER, 0},
 139   {".GE.", BINOP_GEQ, PREC_ORDER, 0},
 140   {".GT.", BINOP_GTR, PREC_ORDER, 0},
 141   {".LT.", BINOP_LESS, PREC_ORDER, 0},
 142   {"**", UNOP_IND, PREC_PREFIX, 0},
 143   {"@", BINOP_REPEAT, PREC_REPEAT, 0},
 144   {NULL, OP_NULL, PREC_REPEAT, 0}
 145 };
 146 \f
 147 enum f_primitive_types {
 148   f_primitive_type_character,
 149   f_primitive_type_logical,
 150   f_primitive_type_logical_s1,
 151   f_primitive_type_logical_s2,
 152   f_primitive_type_logical_s8,
 153   f_primitive_type_integer,
 154   f_primitive_type_integer_s2,
 155   f_primitive_type_real,
 156   f_primitive_type_real_s8,
 157   f_primitive_type_real_s16,
 158   f_primitive_type_complex_s8,
 159   f_primitive_type_complex_s16,
 160   f_primitive_type_void,
 161   nr_f_primitive_types
 162 };
 163
 164 static void
 165 f_language_arch_info (struct gdbarch *gdbarch,
 166                       struct language_arch_info *lai)
 167 {
 168   const struct builtin_f_type *builtin = builtin_f_type (gdbarch);
 169
 170   lai->string_char_type = builtin->builtin_character;
 171   lai->primitive_type_vector
 172     = GDBARCH_OBSTACK_CALLOC (gdbarch, nr_f_primitive_types + 1,
 173                               struct type *);
 174
 175   lai->primitive_type_vector [f_primitive_type_character]
 176     = builtin->builtin_character;
 177   lai->primitive_type_vector [f_primitive_type_logical]
 178     = builtin->builtin_logical;
 179   lai->primitive_type_vector [f_primitive_type_logical_s1]
 180     = builtin->builtin_logical_s1;
 181   lai->primitive_type_vector [f_primitive_type_logical_s2]
 182     = builtin->builtin_logical_s2;
 183   lai->primitive_type_vector [f_primitive_type_logical_s8]
 184     = builtin->builtin_logical_s8;
 185   lai->primitive_type_vector [f_primitive_type_real]
 186     = builtin->builtin_real;
 187   lai->primitive_type_vector [f_primitive_type_real_s8]
 188     = builtin->builtin_real_s8;
 189   lai->primitive_type_vector [f_primitive_type_real_s16]
 190     = builtin->builtin_real_s16;
 191   lai->primitive_type_vector [f_primitive_type_complex_s8]
 192     = builtin->builtin_complex_s8;
 193   lai->primitive_type_vector [f_primitive_type_complex_s16]
 194     = builtin->builtin_complex_s16;
 195   lai->primitive_type_vector [f_primitive_type_void]
 196     = builtin->builtin_void;
 197
 198   lai->bool_type_symbol = "logical";
 199   lai->bool_type_default = builtin->builtin_logical_s2;
 200 }
 201
 202 /* Remove the modules separator :: from the default break list.  */
 203
 204 static const char *
 205 f_word_break_characters (void)
 206 {
 207   static char *retval;
 208
 209   if (!retval)
 210     {
 211       char *s;
 212
 213       retval = xstrdup (default_word_break_characters ());
 214       s = strchr (retval, ':');
 215       if (s)
 216         {
 217           char *last_char = &s[strlen (s) - 1];
 218
 219           *s = *last_char;
 220           *last_char = 0;
 221         }
 222     }
 223   return retval;
 224 }
 225
 226 /* Consider the modules separator :: as a valid symbol name character
 227    class.  */
 228
 229 static void
 230 f_collect_symbol_completion_matches (completion_tracker &tracker,
 231                                      complete_symbol_mode mode,
 232                                      symbol_name_match_type compare_name,
 233                                      const char *text, const char *word,
 234                                      enum type_code code)
 235 {
 236   default_collect_symbol_completion_matches_break_on (tracker, mode,
 237                                                       compare_name,
 238                                                       text, word, ":", code);
 239 }
 240
 241 static const char *f_extensions[] =
 242 {
 243   ".f", ".F", ".for", ".FOR", ".ftn", ".FTN", ".fpp", ".FPP",
 244   ".f90", ".F90", ".f95", ".F95", ".f03", ".F03", ".f08", ".F08",
 245   NULL
 246 };
 247
 248 extern const struct language_defn f_language_defn =
 249 {
 250   "fortran",
 251   "Fortran",
 252   language_fortran,
 253   range_check_on,
 254   case_sensitive_off,
 255   array_column_major,
 256   macro_expansion_no,
 257   f_extensions,
 258   &exp_descriptor_standard,
 259   f_parse,                      /* parser */
 260   f_yyerror,                    /* parser error function */
 261   null_post_parser,
 262   f_printchar,                  /* Print character constant */
 263   f_printstr,                   /* function to print string constant */
 264   f_emit_char,                  /* Function to print a single character */
 265   f_print_type,                 /* Print a type using appropriate syntax */
 266   default_print_typedef,        /* Print a typedef using appropriate syntax */
 267   f_val_print,                  /* Print a value using appropriate syntax */
 268   c_value_print,                /* FIXME */
 269   default_read_var_value,       /* la_read_var_value */
 270   NULL,                         /* Language specific skip_trampoline */
 271   NULL,                         /* name_of_this */
 272   cp_lookup_symbol_nonlocal,    /* lookup_symbol_nonlocal */
 273   basic_lookup_transparent_type,/* lookup_transparent_type */
 274
 275   /* We could support demangling here to provide module namespaces
 276      also for inferiors with only minimal symbol table (ELF symbols).
 277      Just the mangling standard is not standardized across compilers
 278      and there is no DW_AT_producer available for inferiors with only
 279      the ELF symbols to check the mangling kind.  */
 280   NULL,                         /* Language specific symbol demangler */
 281   NULL,
 282   NULL,                         /* Language specific
 283                                    class_name_from_physname */
 284   f_op_print_tab,               /* expression operators for printing */
 285   0,                            /* arrays are first-class (not c-style) */
 286   1,                            /* String lower bound */
 287   f_word_break_characters,
 288   f_collect_symbol_completion_matches,
 289   f_language_arch_info,
 290   default_print_array_index,
 291   default_pass_by_reference,
 292   default_get_string,
 293   c_watch_location_expression,
 294   NULL,                         /* la_get_symbol_name_matcher */
 295   iterate_over_symbols,
 296   default_search_name_hash,
 297   &default_varobj_ops,
 298   NULL,
 299   NULL,
 300   LANG_MAGIC
 301 };
 302
 303 static void *
 304 build_fortran_types (struct gdbarch *gdbarch)
 305 {
 306   struct builtin_f_type *builtin_f_type
 307     = GDBARCH_OBSTACK_ZALLOC (gdbarch, struct builtin_f_type);
 308
 309   builtin_f_type->builtin_void
 310     = arch_type (gdbarch, TYPE_CODE_VOID, TARGET_CHAR_BIT, "VOID");
 311
 312   builtin_f_type->builtin_character
 313     = arch_integer_type (gdbarch, TARGET_CHAR_BIT, 0, "character");
 314
 315   builtin_f_type->builtin_logical_s1
 316     = arch_boolean_type (gdbarch, TARGET_CHAR_BIT, 1, "logical*1");
 317
 318   builtin_f_type->builtin_integer_s2
 319     = arch_integer_type (gdbarch, gdbarch_short_bit (gdbarch), 0,
 320                          "integer*2");
 321
 322   builtin_f_type->builtin_logical_s2
 323     = arch_boolean_type (gdbarch, gdbarch_short_bit (gdbarch), 1,
 324                          "logical*2");
 325
 326   builtin_f_type->builtin_logical_s8
 327     = arch_boolean_type (gdbarch, gdbarch_long_long_bit (gdbarch), 1,
 328                          "logical*8");
 329
 330   builtin_f_type->builtin_integer
 331     = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0,
 332                          "integer");
 333
 334   builtin_f_type->builtin_logical
 335     = arch_boolean_type (gdbarch, gdbarch_int_bit (gdbarch), 1,
 336                          "logical*4");
 337
 338   builtin_f_type->builtin_real
 339     = arch_float_type (gdbarch, gdbarch_float_bit (gdbarch),
 340                        "real", gdbarch_float_format (gdbarch));
 341   builtin_f_type->builtin_real_s8
 342     = arch_float_type (gdbarch, gdbarch_double_bit (gdbarch),
 343                        "real*8", gdbarch_double_format (gdbarch));
 344   builtin_f_type->builtin_real_s16
 345     = arch_float_type (gdbarch, gdbarch_long_double_bit (gdbarch),
 346                        "real*16", gdbarch_long_double_format (gdbarch));
 347
 348   builtin_f_type->builtin_complex_s8
 349     = arch_complex_type (gdbarch, "complex*8",
 350                          builtin_f_type->builtin_real);
 351   builtin_f_type->builtin_complex_s16
 352     = arch_complex_type (gdbarch, "complex*16",
 353                          builtin_f_type->builtin_real_s8);
 354   builtin_f_type->builtin_complex_s32
 355     = arch_complex_type (gdbarch, "complex*32",
 356                          builtin_f_type->builtin_real_s16);
 357
 358   return builtin_f_type;
 359 }
 360
 361 static struct gdbarch_data *f_type_data;
 362
 363 const struct builtin_f_type *
 364 builtin_f_type (struct gdbarch *gdbarch)
 365 {
 366   return (const struct builtin_f_type *) gdbarch_data (gdbarch, f_type_data);
 367 }
 368
 369 void
 370 _initialize_f_language (void)
 371 {
 372   f_type_data = gdbarch_data_register_post_init (build_fortran_types);
 373 }