gcc/java/lang.c

   1 /* Java(TM) language-specific utility routines.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.
  21
  22 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 /* Hacked by Per Bothner <bothner@cygnus.com> February 1996. */
  27
  28 #include "config.h"
  29 #include "system.h"
  30 #include "tree.h"
  31 #include "input.h"
  32 #include "rtl.h"
  33 #include "expr.h"
  34 #include "java-tree.h"
  35 #include "jcf.h"
  36 #include "toplev.h"
  37 #include "flags.h"
  38 #include "xref.h"
  39 #include "ggc.h"
  40 #include "diagnostic.h"
  41
  42 struct string_option
  43 {
  44   const char *string;
  45   int *variable;
  46   int on_value;
  47 };
  48
  49 static void java_init PARAMS ((void));
  50 static void java_init_options PARAMS ((void));
  51 static int java_decode_option PARAMS ((int, char **));
  52 static void put_decl_string PARAMS ((const char *, int));
  53 static void put_decl_node PARAMS ((tree));
  54 static void java_dummy_print PARAMS ((diagnostic_context *, const char *));
  55 static void lang_print_error PARAMS ((diagnostic_context *, const char *));
  56 static int process_option_with_no PARAMS ((char *,
  57                                            struct string_option *,
  58                                            int));
  59
  60 #ifndef TARGET_OBJECT_SUFFIX
  61 # define TARGET_OBJECT_SUFFIX ".o"
  62 #endif
  63
  64 /* Table indexed by tree code giving a string containing a character
  65    classifying the tree code.  Possibilities are
  66    t, d, s, c, r, <, 1 and 2.  See java/java-tree.def for details.  */
  67
  68 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
  69
  70 char java_tree_code_type[] = {
  71   'x',
  72 #include "java-tree.def"
  73 };
  74 #undef DEFTREECODE
  75
  76 /* Table indexed by tree code giving number of expression
  77    operands beyond the fixed part of the node structure.
  78    Not used for types or decls.  */
  79
  80 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
  81
  82 int java_tree_code_length[] = {
  83   0,
  84 #include "java-tree.def"
  85 };
  86 #undef DEFTREECODE
  87
  88 /* Names of tree components.
  89    Used for printing out the tree and error messages.  */
  90 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
  91
  92 const char *java_tree_code_name[] = {
  93   "@@dummy",
  94 #include "java-tree.def"
  95 };
  96 #undef DEFTREECODE
  97
  98 int compiling_from_source;
  99
 100 const char * const language_string = "GNU Java";
 101
 102 int flag_emit_class_files = 0;
 103
 104 /* Nonzero if input file is a file with a list of filenames to compile. */
 105
 106 int flag_filelist_file = 0;
 107
 108 /* When non zero, we emit xref strings. Values of the flag for xref
 109    backends are defined in xref_flag_table, xref.c.  */
 110
 111 int flag_emit_xref = 0;
 112
 113 /* When non zero, -Wall was turned on.  */
 114 int flag_wall = 0;
 115
 116 /* When non zero, check for redundant modifier uses.  */
 117 int flag_redundant = 0;
 118
 119 /* When non zero, call a library routine to do integer divisions. */
 120 int flag_use_divide_subroutine = 1;
 121
 122 /* When non zero, generate code for the Boehm GC.  */
 123 int flag_use_boehm_gc = 0;
 124
 125 /* When non zero, assume the runtime uses a hash table to map an
 126    object to its synchronization structure.  */
 127 int flag_hash_synchronization;
 128
 129 /* When non zero, assume all native functions are implemented with
 130    JNI, not CNI.  */
 131 int flag_jni = 0;
 132
 133 /* When non zero, warn when source file is newer than matching class
 134    file.  */
 135 int flag_newer = 1;
 136
 137 /* When non zero, generate checks for references to NULL.  */
 138 int flag_check_references = 0;
 139
 140 /* The encoding of the source file.  */
 141 const char *current_encoding = NULL;
 142
 143 /* When non zero, report the now deprecated empty statements.  */
 144 int flag_extraneous_semicolon;
 145
 146 /* When non zero, always check for a non gcj generated classes archive.  */
 147 int flag_force_classes_archive_check;
 148
 149 /* When zero, don't optimize static class initialization. This flag shouldn't
 150    be tested alone, use STATIC_CLASS_INITIALIZATION_OPTIMIZATION_P instead.  */
 151 int flag_optimize_sci = 1;
 152
 153 /* Table of language-dependent -f options.
 154    STRING is the option name.  VARIABLE is the address of the variable.
 155    ON_VALUE is the value to store in VARIABLE
 156     if `-fSTRING' is seen as an option.
 157    (If `-fno-STRING' is seen as an option, the opposite value is stored.)  */
 158
 159 static struct string_option
 160 lang_f_options[] =
 161 {
 162   {"emit-class-file", &flag_emit_class_files, 1},
 163   {"emit-class-files", &flag_emit_class_files, 1},
 164   {"filelist-file", &flag_filelist_file, 1},
 165   {"use-divide-subroutine", &flag_use_divide_subroutine, 1},
 166   {"use-boehm-gc", &flag_use_boehm_gc, 1},
 167   {"hash-synchronization", &flag_hash_synchronization, 1},
 168   {"jni", &flag_jni, 1},
 169   {"check-references", &flag_check_references, 1},
 170   {"force-classes-archive-check", &flag_force_classes_archive_check, 1}
 171 };
 172
 173 static struct string_option
 174 lang_W_options[] =
 175 {
 176   { "redundant-modifiers", &flag_redundant, 1 },
 177   { "extraneous-semicolon", &flag_extraneous_semicolon, 1 },
 178   { "out-of-date", &flag_newer, 1 }
 179 };
 180
 181 JCF *current_jcf;
 182
 183 /* Variable controlling how dependency tracking is enabled in
 184    init_parse.  */
 185 static int dependency_tracking = 0;
 186
 187 /* Flag values for DEPENDENCY_TRACKING.  */
 188 #define DEPEND_SET_FILE 1
 189 #define DEPEND_ENABLE   2
 190 #define DEPEND_TARGET_SET 4
 191 #define DEPEND_FILE_ALREADY_SET 8
 192
 193 /* Each front end provides its own.  */
 194 struct lang_hooks lang_hooks = {java_init,
 195                                 NULL, /* java_finish */
 196                                 java_init_options,
 197                                 java_decode_option,
 198                                 NULL /* post_options */};
 199
 200 /* Process an option that can accept a `no-' form.
 201    Return 1 if option found, 0 otherwise.  */
 202 static int
 203 process_option_with_no (p, table, table_size)
 204      char *p;
 205      struct string_option *table;
 206      int table_size;
 207 {
 208   int j;
 209
 210   for (j = 0; j < table_size; j++)
 211     {
 212       if (!strcmp (p, table[j].string))
 213         {
 214           *table[j].variable = table[j].on_value;
 215           return 1;
 216         }
 217       if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
 218           && ! strcmp (p+3, table[j].string))
 219         {
 220           *table[j].variable = ! table[j].on_value;
 221           return 1;
 222         }
 223     }
 224
 225   return 0;
 226 }
 227
 228 /*
 229  * process java-specific compiler command-line options
 230  * return 0, but do not complain if the option is not recognised.
 231  */
 232 static int
 233 java_decode_option (argc, argv)
 234      int argc __attribute__ ((__unused__));
 235      char **argv;
 236 {
 237   char *p = argv[0];
 238
 239 #define CLARG "-fassume-compiled="
 240   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 241     {
 242       add_assume_compiled (p + sizeof (CLARG) - 1, 0);
 243       return 1;
 244     }
 245 #undef CLARG
 246 #define CLARG "-fno-assume-compiled="
 247   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 248     {
 249       add_assume_compiled (p + sizeof (CLARG) - 1, 1);
 250       return 1;
 251     }
 252 #undef CLARG
 253 #define CLARG "-fassume-compiled"
 254   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 255     {
 256       add_assume_compiled ("", 0);
 257       return 1;
 258     }
 259 #undef CLARG
 260 #define CLARG "-fno-assume-compiled"
 261   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 262     {
 263       add_assume_compiled ("", 1);
 264       return 1;
 265     }
 266 #undef CLARG
 267 #define CLARG "-fclasspath="
 268   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 269     {
 270       jcf_path_classpath_arg (p + sizeof (CLARG) - 1);
 271       return 1;
 272     }
 273 #undef CLARG
 274 #define CLARG "-fCLASSPATH="
 275   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 276     {
 277       jcf_path_CLASSPATH_arg (p + sizeof (CLARG) - 1);
 278       return 1;
 279     }
 280 #undef CLARG
 281   else if (strncmp (p, "-I", 2) == 0)
 282     {
 283       jcf_path_include_arg (p + 2);
 284       return 1;
 285     }
 286
 287 #define ARG "-foutput-class-dir="
 288   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 289     {
 290       jcf_write_base_directory = p + sizeof (ARG) - 1;
 291       return 1;
 292     }
 293 #undef ARG
 294 #define ARG "-fencoding="
 295   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 296     {
 297       current_encoding = p + sizeof (ARG) - 1;
 298       return 1;
 299     }
 300 #undef ARG
 301
 302 #undef ARG
 303 #define ARG "-fno-optimize-static-class-initialization"
 304   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 305     {
 306       flag_optimize_sci = 0;
 307       return 1;
 308     }
 309 #undef ARG
 310
 311   if (p[0] == '-' && p[1] == 'f')
 312     {
 313       /* Some kind of -f option.
 314          P's value is the option sans `-f'.
 315          Search for it in the table of options.  */
 316       p += 2;
 317       return process_option_with_no (p, lang_f_options,
 318                                      ARRAY_SIZE (lang_f_options));
 319     }
 320
 321   if (strcmp (p, "-Wall") == 0)
 322     {
 323       flag_wall = 1;
 324       flag_redundant = 1;
 325       flag_extraneous_semicolon = 1;
 326       /* When -Wall given, enable -Wunused.  We do this because the C
 327          compiler does it, and people expect it.  */
 328       set_Wunused (1);
 329       return 1;
 330     }
 331
 332   if (p[0] == '-' && p[1] == 'W')
 333     {
 334       /* Skip `-W' and see if we accept the option or its `no-' form.  */
 335       p += 2;
 336       return process_option_with_no (p, lang_W_options,
 337                                      ARRAY_SIZE (lang_W_options));
 338     }
 339
 340   if (strcmp (p, "-MD") == 0)
 341     {
 342       jcf_dependency_init (1);
 343       dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
 344       return 1;
 345     }
 346   else if (strcmp (p, "-MMD") == 0)
 347     {
 348       jcf_dependency_init (0);
 349       dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
 350       return 1;
 351     }
 352   else if (strcmp (p, "-M") == 0)
 353     {
 354       jcf_dependency_init (1);
 355       dependency_tracking |= DEPEND_ENABLE;
 356       return 1;
 357     }
 358   else if (strcmp (p, "-MM") == 0)
 359     {
 360       jcf_dependency_init (0);
 361       dependency_tracking |= DEPEND_ENABLE;
 362       return 1;
 363     }
 364   else if (strcmp (p, "-MP") == 0)
 365     {
 366       jcf_dependency_print_dummies ();
 367       return 1;
 368     }
 369   else if (strcmp (p, "-MT") == 0)
 370     {
 371       jcf_dependency_set_target (argv[1]);
 372       dependency_tracking |= DEPEND_TARGET_SET;
 373       return 2;
 374     }
 375   else if (strcmp (p, "-MF") == 0)
 376     {
 377       jcf_dependency_set_dep_file (argv[1]);
 378       dependency_tracking |= DEPEND_FILE_ALREADY_SET;
 379       return 2;
 380     }
 381
 382   return 0;
 383 }
 384
 385 /* Global open file.  */
 386 FILE *finput;
 387
 388 const char *
 389 init_parse (filename)
 390      const char *filename;
 391 {
 392   /* Open input file.  */
 393
 394   if (filename == 0 || !strcmp (filename, "-"))
 395     {
 396       finput = stdin;
 397       filename = "stdin";
 398
 399       if (dependency_tracking)
 400         error ("can't do dependency tracking with input from stdin");
 401     }
 402   else
 403     {
 404       if (dependency_tracking)
 405         {
 406           char *dot;
 407
 408           /* If the target is set and the output filename is set, then
 409              there's no processing to do here.  Otherwise we must
 410              compute one or the other.  */
 411           if (! ((dependency_tracking & DEPEND_TARGET_SET)
 412                  && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
 413             {
 414               dot = strrchr (filename, '.');
 415               if (dot == NULL)
 416                 error ("couldn't determine target name for dependency tracking");
 417               else
 418                 {
 419                   char *buf = (char *) xmalloc (dot - filename +
 420                                                 3 + sizeof (TARGET_OBJECT_SUFFIX));
 421                   strncpy (buf, filename, dot - filename);
 422
 423                   /* If emitting class files, we might have multiple
 424                      targets.  The class generation code takes care of
 425                      registering them.  Otherwise we compute the
 426                      target name here.  */
 427                   if ((dependency_tracking & DEPEND_TARGET_SET))
 428                     ; /* Nothing.  */
 429                   else if (flag_emit_class_files)
 430                     jcf_dependency_set_target (NULL);
 431                   else
 432                     {
 433                       strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
 434                       jcf_dependency_set_target (buf);
 435                     }
 436
 437                   if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
 438                     ; /* Nothing.  */
 439                   else if ((dependency_tracking & DEPEND_SET_FILE))
 440                     {
 441                       strcpy (buf + (dot - filename), ".d");
 442                       jcf_dependency_set_dep_file (buf);
 443                     }
 444                   else
 445                     jcf_dependency_set_dep_file ("-");
 446
 447                   free (buf);
 448                 }
 449             }
 450         }
 451     }
 452
 453   init_lex ();
 454
 455   return filename;
 456 }
 457
 458 void
 459 finish_parse ()
 460 {
 461   jcf_dependency_write ();
 462 }
 463
 464 /* Buffer used by lang_printable_name. */
 465 static char *decl_buf = NULL;
 466
 467 /* Allocated size of decl_buf. */
 468 static int decl_buflen = 0;
 469
 470 /* Length of used part of decl_buf;  position for next character. */
 471 static int decl_bufpos = 0;
 472
 473 /* Append the string STR to decl_buf.
 474    It length is given by LEN;  -1 means the string is nul-terminated. */
 475
 476 static void
 477 put_decl_string (str, len)
 478      const char *str;
 479      int len;
 480 {
 481   if (len < 0)
 482     len = strlen (str);
 483   if (decl_bufpos + len >= decl_buflen)
 484     {
 485       if (decl_buf == NULL)
 486         {
 487           decl_buflen = len + 100;
 488           decl_buf = (char *) xmalloc (decl_buflen);
 489         }
 490       else
 491         {
 492           decl_buflen *= 2;
 493           decl_buf = (char *) xrealloc (decl_buf, decl_buflen);
 494         }
 495     }
 496   strcpy (decl_buf + decl_bufpos, str);
 497   decl_bufpos += len;
 498 }
 499
 500 /* Append to decl_buf a printable name for NODE. */
 501
 502 static void
 503 put_decl_node (node)
 504      tree node;
 505 {
 506   int was_pointer = 0;
 507   if (TREE_CODE (node) == POINTER_TYPE)
 508     {
 509       node = TREE_TYPE (node);
 510       was_pointer = 1;
 511     }
 512   if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
 513       && DECL_NAME (node) != NULL_TREE)
 514     {
 515       /* We want to print the type the DECL belongs to. We don't do
 516          that when we handle constructors. */
 517       if (TREE_CODE (node) == FUNCTION_DECL
 518           && ! DECL_CONSTRUCTOR_P (node)
 519           && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
 520         {
 521           put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
 522           put_decl_string (".", 1);
 523         }
 524       if (! DECL_CONSTRUCTOR_P (node))
 525         put_decl_node (DECL_NAME (node));
 526       if (TREE_CODE (node) == FUNCTION_DECL && TREE_TYPE (node) != NULL_TREE)
 527         {
 528           int i = 0;
 529           tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
 530           if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
 531             args = TREE_CHAIN (args);
 532           put_decl_string ("(", 1);
 533           for ( ; args != end_params_node;  args = TREE_CHAIN (args), i++)
 534             {
 535               if (i > 0)
 536                 put_decl_string (",", 1);
 537               put_decl_node (TREE_VALUE (args));
 538             }
 539           put_decl_string (")", 1);
 540         }
 541     }
 542   else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
 543       && TYPE_NAME (node) != NULL_TREE)
 544     {
 545       if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
 546         {
 547           put_decl_node (TYPE_ARRAY_ELEMENT (node));
 548           put_decl_string("[]", 2);
 549         }
 550       else if (node == promoted_byte_type_node)
 551         put_decl_string ("byte", 4);
 552       else if (node == promoted_short_type_node)
 553         put_decl_string ("short", 5);
 554       else if (node == promoted_char_type_node)
 555         put_decl_string ("char", 4);
 556       else if (node == promoted_boolean_type_node)
 557         put_decl_string ("boolean", 7);
 558       else if (node == void_type_node && was_pointer)
 559         put_decl_string ("null", 4);
 560       else
 561         put_decl_node (TYPE_NAME (node));
 562     }
 563   else if (TREE_CODE (node) == IDENTIFIER_NODE)
 564     put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
 565   else
 566     put_decl_string ("<unknown>", -1);
 567 }
 568
 569 /* Return a user-friendly name for DECL.
 570    The resulting string is only valid until the next call.
 571    The value of the hook decl_printable_name is this function,
 572    which is also called directly by lang_print_error. */
 573
 574 const char *
 575 lang_printable_name (decl, v)
 576      tree decl;
 577      int v  __attribute__ ((__unused__));
 578 {
 579   decl_bufpos = 0;
 580   put_decl_node (decl);
 581   put_decl_string ("", 1);
 582   return decl_buf;
 583 }
 584
 585 /* Does the same thing that lang_printable_name, but add a leading
 586    space to the DECL name string -- With Leading Space.  */
 587
 588 const char *
 589 lang_printable_name_wls (decl, v)
 590      tree decl;
 591      int v  __attribute__ ((__unused__));
 592 {
 593   decl_bufpos = 1;
 594   put_decl_node (decl);
 595   put_decl_string ("", 1);
 596   decl_buf [0] = ' ';
 597   return decl_buf;
 598 }
 599
 600 /* Print on stderr the current class and method context.  This function
 601    is the value of the hook print_error_function, called from toplev.c. */
 602
 603 static void
 604 lang_print_error (context, file)
 605      diagnostic_context *context __attribute__((__unused__));
 606      const char *file;
 607 {
 608   static tree last_error_function_context = NULL_TREE;
 609   static tree last_error_function = NULL;
 610   static int initialized_p;
 611
 612   /* Register LAST_ERROR_FUNCTION_CONTEXT and LAST_ERROR_FUNCTION with
 613      the garbage collector.  */
 614   if (!initialized_p)
 615     {
 616       ggc_add_tree_root (&last_error_function_context, 1);
 617       ggc_add_tree_root (&last_error_function, 1);
 618       initialized_p = 1;
 619     }
 620
 621   if (current_function_decl != NULL
 622       && DECL_CONTEXT (current_function_decl) != last_error_function_context)
 623     {
 624       if (file)
 625         fprintf (stderr, "%s: ", file);
 626
 627       last_error_function_context = DECL_CONTEXT (current_function_decl);
 628       fprintf (stderr, "In class `%s':\n",
 629                lang_printable_name (last_error_function_context, 0));
 630     }
 631   if (last_error_function != current_function_decl)
 632     {
 633       if (file)
 634         fprintf (stderr, "%s: ", file);
 635
 636       if (current_function_decl == NULL)
 637         fprintf (stderr, "At top level:\n");
 638       else
 639         {
 640           const char *name = lang_printable_name (current_function_decl, 2);
 641           fprintf (stderr, "In method `%s':\n", name);
 642         }
 643
 644       last_error_function = current_function_decl;
 645     }
 646
 647 }
 648
 649 static void
 650 java_init ()
 651 {
 652 #if 0
 653   extern int flag_minimal_debug;
 654   flag_minimal_debug = 0;
 655 #endif
 656
 657   jcf_path_init ();
 658   jcf_path_seal ();
 659
 660   decl_printable_name = lang_printable_name;
 661   print_error_function = lang_print_error;
 662   lang_expand_expr = java_lang_expand_expr;
 663
 664   /* Append to Gcc tree node definition arrays */
 665
 666   memcpy (tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE,
 667           java_tree_code_type,
 668           (int)LAST_JAVA_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE);
 669   memcpy (tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE,
 670           java_tree_code_length,
 671           (LAST_JAVA_TREE_CODE -
 672            (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (int));
 673   memcpy (tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE,
 674           java_tree_code_name,
 675           (LAST_JAVA_TREE_CODE -
 676            (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *));
 677
 678   using_eh_for_cleanups ();
 679 }
 680
 681 /* This doesn't do anything on purpose. It's used to satisfy the
 682    print_error_function hook we don't print error messages with bogus
 683    function prototypes.  */
 684
 685 static void
 686 java_dummy_print (c, s)
 687      diagnostic_context *c __attribute__ ((__unused__));
 688      const char *s __attribute__ ((__unused__));
 689 {
 690 }
 691
 692 /* Called to install the PRINT_ERROR_FUNCTION hook differently
 693    according to LEVEL. LEVEL is 1 during early parsing, when function
 694    prototypes aren't fully resolved. print_error_function is set so it
 695    doesn't print incomplete function prototypes. When LEVEL is 2,
 696    function prototypes are fully resolved and can be printed when
 697    reporting errors.  */
 698
 699 void lang_init_source (level)
 700      int level;
 701 {
 702   if (level == 1)
 703     print_error_function = java_dummy_print;
 704   else
 705     print_error_function = lang_print_error;
 706 }
 707
 708 static void
 709 java_init_options ()
 710 {
 711   flag_bounds_check = 1;
 712   flag_exceptions = 1;
 713   flag_non_call_exceptions = 1;
 714 }
 715
 716 const char *
 717 lang_identify ()
 718 {
 719   return "Java";
 720 }
 721
 722 /* Hooks for print_node.  */
 723
 724 void
 725 print_lang_decl (file, node, indent)
 726      FILE *file __attribute ((__unused__));
 727      tree node __attribute ((__unused__));
 728      int indent __attribute ((__unused__));
 729 {
 730 }
 731
 732 void
 733 print_lang_type (file, node, indent)
 734      FILE *file __attribute ((__unused__));
 735      tree node __attribute ((__unused__));
 736      int indent __attribute ((__unused__));
 737 {
 738 }
 739
 740 void
 741 print_lang_identifier (file, node, indent)
 742      FILE *file __attribute ((__unused__));
 743      tree node __attribute ((__unused__));
 744      int indent __attribute ((__unused__));
 745 {
 746 }
 747
 748 void
 749 print_lang_statistics ()
 750 {
 751 }
 752
 753 /* used by print-tree.c */
 754
 755 void
 756 lang_print_xnode (file, node, indent)
 757      FILE *file __attribute ((__unused__));
 758      tree node __attribute ((__unused__));
 759      int indent __attribute ((__unused__));
 760 {
 761 }
 762
 763 /* Return the typed-based alias set for T, which may be an expression
 764    or a type.  Return -1 if we don't do anything special.  */
 765
 766 HOST_WIDE_INT
 767 lang_get_alias_set (t)
 768      tree t ATTRIBUTE_UNUSED;
 769 {
 770   return -1;
 771 }