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 /* When non zero, print extra version information.  */
 154 static int version_flag = 0;
 155
 156 /* Table of language-dependent -f options.
 157    STRING is the option name.  VARIABLE is the address of the variable.
 158    ON_VALUE is the value to store in VARIABLE
 159     if `-fSTRING' is seen as an option.
 160    (If `-fno-STRING' is seen as an option, the opposite value is stored.)  */
 161
 162 static struct string_option
 163 lang_f_options[] =
 164 {
 165   {"emit-class-file", &flag_emit_class_files, 1},
 166   {"emit-class-files", &flag_emit_class_files, 1},
 167   {"filelist-file", &flag_filelist_file, 1},
 168   {"use-divide-subroutine", &flag_use_divide_subroutine, 1},
 169   {"use-boehm-gc", &flag_use_boehm_gc, 1},
 170   {"hash-synchronization", &flag_hash_synchronization, 1},
 171   {"jni", &flag_jni, 1},
 172   {"check-references", &flag_check_references, 1},
 173   {"force-classes-archive-check", &flag_force_classes_archive_check, 1}
 174 };
 175
 176 static struct string_option
 177 lang_W_options[] =
 178 {
 179   { "redundant-modifiers", &flag_redundant, 1 },
 180   { "extraneous-semicolon", &flag_extraneous_semicolon, 1 },
 181   { "out-of-date", &flag_newer, 1 }
 182 };
 183
 184 JCF *current_jcf;
 185
 186 /* Variable controlling how dependency tracking is enabled in
 187    init_parse.  */
 188 static int dependency_tracking = 0;
 189
 190 /* Flag values for DEPENDENCY_TRACKING.  */
 191 #define DEPEND_SET_FILE 1
 192 #define DEPEND_ENABLE   2
 193 #define DEPEND_TARGET_SET 4
 194 #define DEPEND_FILE_ALREADY_SET 8
 195
 196 /* Each front end provides its own.  */
 197 struct lang_hooks lang_hooks = {java_init,
 198                                 NULL, /* java_finish */
 199                                 java_init_options,
 200                                 java_decode_option,
 201                                 NULL /* post_options */};
 202
 203 /* Process an option that can accept a `no-' form.
 204    Return 1 if option found, 0 otherwise.  */
 205 static int
 206 process_option_with_no (p, table, table_size)
 207      char *p;
 208      struct string_option *table;
 209      int table_size;
 210 {
 211   int j;
 212
 213   for (j = 0; j < table_size; j++)
 214     {
 215       if (!strcmp (p, table[j].string))
 216         {
 217           *table[j].variable = table[j].on_value;
 218           return 1;
 219         }
 220       if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
 221           && ! strcmp (p+3, table[j].string))
 222         {
 223           *table[j].variable = ! table[j].on_value;
 224           return 1;
 225         }
 226     }
 227
 228   return 0;
 229 }
 230
 231 /*
 232  * process java-specific compiler command-line options
 233  * return 0, but do not complain if the option is not recognised.
 234  */
 235 static int
 236 java_decode_option (argc, argv)
 237      int argc __attribute__ ((__unused__));
 238      char **argv;
 239 {
 240   char *p = argv[0];
 241
 242   if (strcmp (p, "-version") == 0)
 243     {
 244       version_flag = 1;
 245       /* We return 0 so that the caller can process this.  */
 246       return 0;
 247     }
 248
 249 #define CLARG "-fassume-compiled="
 250   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 251     {
 252       add_assume_compiled (p + sizeof (CLARG) - 1, 0);
 253       return 1;
 254     }
 255 #undef CLARG
 256 #define CLARG "-fno-assume-compiled="
 257   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 258     {
 259       add_assume_compiled (p + sizeof (CLARG) - 1, 1);
 260       return 1;
 261     }
 262 #undef CLARG
 263 #define CLARG "-fassume-compiled"
 264   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 265     {
 266       add_assume_compiled ("", 0);
 267       return 1;
 268     }
 269 #undef CLARG
 270 #define CLARG "-fno-assume-compiled"
 271   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 272     {
 273       add_assume_compiled ("", 1);
 274       return 1;
 275     }
 276 #undef CLARG
 277 #define CLARG "-fclasspath="
 278   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 279     {
 280       jcf_path_classpath_arg (p + sizeof (CLARG) - 1);
 281       return 1;
 282     }
 283 #undef CLARG
 284 #define CLARG "-fCLASSPATH="
 285   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 286     {
 287       jcf_path_CLASSPATH_arg (p + sizeof (CLARG) - 1);
 288       return 1;
 289     }
 290 #undef CLARG
 291   else if (strncmp (p, "-I", 2) == 0)
 292     {
 293       jcf_path_include_arg (p + 2);
 294       return 1;
 295     }
 296
 297 #define ARG "-foutput-class-dir="
 298   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 299     {
 300       jcf_write_base_directory = p + sizeof (ARG) - 1;
 301       return 1;
 302     }
 303 #undef ARG
 304 #define ARG "-fencoding="
 305   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 306     {
 307       current_encoding = p + sizeof (ARG) - 1;
 308       return 1;
 309     }
 310 #undef ARG
 311
 312 #undef ARG
 313 #define ARG "-fno-optimize-static-class-initialization"
 314   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 315     {
 316       flag_optimize_sci = 0;
 317       return 1;
 318     }
 319 #undef ARG
 320
 321   if (p[0] == '-' && p[1] == 'f')
 322     {
 323       /* Some kind of -f option.
 324          P's value is the option sans `-f'.
 325          Search for it in the table of options.  */
 326       p += 2;
 327       return process_option_with_no (p, lang_f_options,
 328                                      ARRAY_SIZE (lang_f_options));
 329     }
 330
 331   if (strcmp (p, "-Wall") == 0)
 332     {
 333       flag_wall = 1;
 334       flag_redundant = 1;
 335       flag_extraneous_semicolon = 1;
 336       /* When -Wall given, enable -Wunused.  We do this because the C
 337          compiler does it, and people expect it.  */
 338       set_Wunused (1);
 339       return 1;
 340     }
 341
 342   if (p[0] == '-' && p[1] == 'W')
 343     {
 344       /* Skip `-W' and see if we accept the option or its `no-' form.  */
 345       p += 2;
 346       return process_option_with_no (p, lang_W_options,
 347                                      ARRAY_SIZE (lang_W_options));
 348     }
 349
 350   if (strcmp (p, "-MD") == 0)
 351     {
 352       jcf_dependency_init (1);
 353       dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
 354       return 1;
 355     }
 356   else if (strcmp (p, "-MMD") == 0)
 357     {
 358       jcf_dependency_init (0);
 359       dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
 360       return 1;
 361     }
 362   else if (strcmp (p, "-M") == 0)
 363     {
 364       jcf_dependency_init (1);
 365       dependency_tracking |= DEPEND_ENABLE;
 366       return 1;
 367     }
 368   else if (strcmp (p, "-MM") == 0)
 369     {
 370       jcf_dependency_init (0);
 371       dependency_tracking |= DEPEND_ENABLE;
 372       return 1;
 373     }
 374   else if (strcmp (p, "-MP") == 0)
 375     {
 376       jcf_dependency_print_dummies ();
 377       return 1;
 378     }
 379   else if (strcmp (p, "-MT") == 0)
 380     {
 381       jcf_dependency_set_target (argv[1]);
 382       dependency_tracking |= DEPEND_TARGET_SET;
 383       return 2;
 384     }
 385   else if (strcmp (p, "-MF") == 0)
 386     {
 387       jcf_dependency_set_dep_file (argv[1]);
 388       dependency_tracking |= DEPEND_FILE_ALREADY_SET;
 389       return 2;
 390     }
 391
 392   return 0;
 393 }
 394
 395 /* Global open file.  */
 396 FILE *finput;
 397
 398 const char *
 399 init_parse (filename)
 400      const char *filename;
 401 {
 402   /* Open input file.  */
 403
 404   if (filename == 0 || !strcmp (filename, "-"))
 405     {
 406       finput = stdin;
 407       filename = "stdin";
 408
 409       if (dependency_tracking)
 410         error ("can't do dependency tracking with input from stdin");
 411     }
 412   else
 413     {
 414       if (dependency_tracking)
 415         {
 416           char *dot;
 417
 418           /* If the target is set and the output filename is set, then
 419              there's no processing to do here.  Otherwise we must
 420              compute one or the other.  */
 421           if (! ((dependency_tracking & DEPEND_TARGET_SET)
 422                  && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
 423             {
 424               dot = strrchr (filename, '.');
 425               if (dot == NULL)
 426                 error ("couldn't determine target name for dependency tracking");
 427               else
 428                 {
 429                   char *buf = (char *) xmalloc (dot - filename +
 430                                                 3 + sizeof (TARGET_OBJECT_SUFFIX));
 431                   strncpy (buf, filename, dot - filename);
 432
 433                   /* If emitting class files, we might have multiple
 434                      targets.  The class generation code takes care of
 435                      registering them.  Otherwise we compute the
 436                      target name here.  */
 437                   if ((dependency_tracking & DEPEND_TARGET_SET))
 438                     ; /* Nothing.  */
 439                   else if (flag_emit_class_files)
 440                     jcf_dependency_set_target (NULL);
 441                   else
 442                     {
 443                       strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
 444                       jcf_dependency_set_target (buf);
 445                     }
 446
 447                   if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
 448                     ; /* Nothing.  */
 449                   else if ((dependency_tracking & DEPEND_SET_FILE))
 450                     {
 451                       strcpy (buf + (dot - filename), ".d");
 452                       jcf_dependency_set_dep_file (buf);
 453                     }
 454                   else
 455                     jcf_dependency_set_dep_file ("-");
 456
 457                   free (buf);
 458                 }
 459             }
 460         }
 461     }
 462
 463   init_lex ();
 464
 465   return filename;
 466 }
 467
 468 void
 469 finish_parse ()
 470 {
 471   jcf_dependency_write ();
 472 }
 473
 474 /* Buffer used by lang_printable_name. */
 475 static char *decl_buf = NULL;
 476
 477 /* Allocated size of decl_buf. */
 478 static int decl_buflen = 0;
 479
 480 /* Length of used part of decl_buf;  position for next character. */
 481 static int decl_bufpos = 0;
 482
 483 /* Append the string STR to decl_buf.
 484    It length is given by LEN;  -1 means the string is nul-terminated. */
 485
 486 static void
 487 put_decl_string (str, len)
 488      const char *str;
 489      int len;
 490 {
 491   if (len < 0)
 492     len = strlen (str);
 493   if (decl_bufpos + len >= decl_buflen)
 494     {
 495       if (decl_buf == NULL)
 496         {
 497           decl_buflen = len + 100;
 498           decl_buf = (char *) xmalloc (decl_buflen);
 499         }
 500       else
 501         {
 502           decl_buflen *= 2;
 503           decl_buf = (char *) xrealloc (decl_buf, decl_buflen);
 504         }
 505     }
 506   strcpy (decl_buf + decl_bufpos, str);
 507   decl_bufpos += len;
 508 }
 509
 510 /* Append to decl_buf a printable name for NODE. */
 511
 512 static void
 513 put_decl_node (node)
 514      tree node;
 515 {
 516   int was_pointer = 0;
 517   if (TREE_CODE (node) == POINTER_TYPE)
 518     {
 519       node = TREE_TYPE (node);
 520       was_pointer = 1;
 521     }
 522   if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
 523       && DECL_NAME (node) != NULL_TREE)
 524     {
 525       if (TREE_CODE (node) == FUNCTION_DECL)
 526         {
 527           /* We want to print the type the DECL belongs to. We don't do
 528              that when we handle constructors. */
 529           if (! DECL_CONSTRUCTOR_P (node)
 530               && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
 531             {
 532               put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
 533               put_decl_string (".", 1);
 534             }
 535           if (! DECL_CONSTRUCTOR_P (node))
 536             put_decl_node (DECL_NAME (node));
 537           if (TREE_TYPE (node) != NULL_TREE)
 538             {
 539               int i = 0;
 540               tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
 541               if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
 542                 args = TREE_CHAIN (args);
 543               put_decl_string ("(", 1);
 544               for ( ; args != end_params_node;  args = TREE_CHAIN (args), i++)
 545                 {
 546                   if (i > 0)
 547                     put_decl_string (",", 1);
 548                   put_decl_node (TREE_VALUE (args));
 549                 }
 550               put_decl_string (")", 1);
 551             }
 552         }
 553       else
 554         put_decl_node (DECL_NAME (node));
 555     }
 556   else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
 557       && TYPE_NAME (node) != NULL_TREE)
 558     {
 559       if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
 560         {
 561           put_decl_node (TYPE_ARRAY_ELEMENT (node));
 562           put_decl_string("[]", 2);
 563         }
 564       else if (node == promoted_byte_type_node)
 565         put_decl_string ("byte", 4);
 566       else if (node == promoted_short_type_node)
 567         put_decl_string ("short", 5);
 568       else if (node == promoted_char_type_node)
 569         put_decl_string ("char", 4);
 570       else if (node == promoted_boolean_type_node)
 571         put_decl_string ("boolean", 7);
 572       else if (node == void_type_node && was_pointer)
 573         put_decl_string ("null", 4);
 574       else
 575         put_decl_node (TYPE_NAME (node));
 576     }
 577   else if (TREE_CODE (node) == IDENTIFIER_NODE)
 578     put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
 579   else
 580     put_decl_string ("<unknown>", -1);
 581 }
 582
 583 /* Return a user-friendly name for DECL.
 584    The resulting string is only valid until the next call.
 585    The value of the hook decl_printable_name is this function,
 586    which is also called directly by lang_print_error. */
 587
 588 const char *
 589 lang_printable_name (decl, v)
 590      tree decl;
 591      int v  __attribute__ ((__unused__));
 592 {
 593   decl_bufpos = 0;
 594   put_decl_node (decl);
 595   put_decl_string ("", 1);
 596   return decl_buf;
 597 }
 598
 599 /* Does the same thing that lang_printable_name, but add a leading
 600    space to the DECL name string -- With Leading Space.  */
 601
 602 const char *
 603 lang_printable_name_wls (decl, v)
 604      tree decl;
 605      int v  __attribute__ ((__unused__));
 606 {
 607   decl_bufpos = 1;
 608   put_decl_node (decl);
 609   put_decl_string ("", 1);
 610   decl_buf [0] = ' ';
 611   return decl_buf;
 612 }
 613
 614 /* Print on stderr the current class and method context.  This function
 615    is the value of the hook print_error_function, called from toplev.c. */
 616
 617 static void
 618 lang_print_error (context, file)
 619      diagnostic_context *context __attribute__((__unused__));
 620      const char *file;
 621 {
 622   static tree last_error_function_context = NULL_TREE;
 623   static tree last_error_function = NULL;
 624   static int initialized_p;
 625
 626   /* Register LAST_ERROR_FUNCTION_CONTEXT and LAST_ERROR_FUNCTION with
 627      the garbage collector.  */
 628   if (!initialized_p)
 629     {
 630       ggc_add_tree_root (&last_error_function_context, 1);
 631       ggc_add_tree_root (&last_error_function, 1);
 632       initialized_p = 1;
 633     }
 634
 635   if (current_function_decl != NULL
 636       && DECL_CONTEXT (current_function_decl) != last_error_function_context)
 637     {
 638       if (file)
 639         fprintf (stderr, "%s: ", file);
 640
 641       last_error_function_context = DECL_CONTEXT (current_function_decl);
 642       fprintf (stderr, "In class `%s':\n",
 643                lang_printable_name (last_error_function_context, 0));
 644     }
 645   if (last_error_function != current_function_decl)
 646     {
 647       if (file)
 648         fprintf (stderr, "%s: ", file);
 649
 650       if (current_function_decl == NULL)
 651         fprintf (stderr, "At top level:\n");
 652       else
 653         {
 654           const char *name = lang_printable_name (current_function_decl, 2);
 655           fprintf (stderr, "In %s `%s':\n",
 656                    (DECL_CONSTRUCTOR_P (current_function_decl) ? "constructor"
 657                     : "method"),
 658                    name);
 659         }
 660
 661       last_error_function = current_function_decl;
 662     }
 663
 664 }
 665
 666 static void
 667 java_init ()
 668 {
 669 #if 0
 670   extern int flag_minimal_debug;
 671   flag_minimal_debug = 0;
 672 #endif
 673
 674   jcf_path_init ();
 675   jcf_path_seal (version_flag);
 676
 677   decl_printable_name = lang_printable_name;
 678   print_error_function = lang_print_error;
 679   lang_expand_expr = java_lang_expand_expr;
 680
 681   /* Append to Gcc tree node definition arrays */
 682
 683   memcpy (tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE,
 684           java_tree_code_type,
 685           (int)LAST_JAVA_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE);
 686   memcpy (tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE,
 687           java_tree_code_length,
 688           (LAST_JAVA_TREE_CODE -
 689            (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (int));
 690   memcpy (tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE,
 691           java_tree_code_name,
 692           (LAST_JAVA_TREE_CODE -
 693            (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *));
 694
 695   using_eh_for_cleanups ();
 696 }
 697
 698 /* This doesn't do anything on purpose. It's used to satisfy the
 699    print_error_function hook we don't print error messages with bogus
 700    function prototypes.  */
 701
 702 static void
 703 java_dummy_print (c, s)
 704      diagnostic_context *c __attribute__ ((__unused__));
 705      const char *s __attribute__ ((__unused__));
 706 {
 707 }
 708
 709 /* Called to install the PRINT_ERROR_FUNCTION hook differently
 710    according to LEVEL. LEVEL is 1 during early parsing, when function
 711    prototypes aren't fully resolved. print_error_function is set so it
 712    doesn't print incomplete function prototypes. When LEVEL is 2,
 713    function prototypes are fully resolved and can be printed when
 714    reporting errors.  */
 715
 716 void lang_init_source (level)
 717      int level;
 718 {
 719   if (level == 1)
 720     print_error_function = java_dummy_print;
 721   else
 722     print_error_function = lang_print_error;
 723 }
 724
 725 static void
 726 java_init_options ()
 727 {
 728   flag_bounds_check = 1;
 729   flag_exceptions = 1;
 730   flag_non_call_exceptions = 1;
 731 }
 732
 733 const char *
 734 lang_identify ()
 735 {
 736   return "Java";
 737 }
 738
 739 /* Hooks for print_node.  */
 740
 741 void
 742 print_lang_decl (file, node, indent)
 743      FILE *file __attribute ((__unused__));
 744      tree node __attribute ((__unused__));
 745      int indent __attribute ((__unused__));
 746 {
 747 }
 748
 749 void
 750 print_lang_type (file, node, indent)
 751      FILE *file __attribute ((__unused__));
 752      tree node __attribute ((__unused__));
 753      int indent __attribute ((__unused__));
 754 {
 755 }
 756
 757 void
 758 print_lang_identifier (file, node, indent)
 759      FILE *file __attribute ((__unused__));
 760      tree node __attribute ((__unused__));
 761      int indent __attribute ((__unused__));
 762 {
 763 }
 764
 765 void
 766 print_lang_statistics ()
 767 {
 768 }
 769
 770 /* used by print-tree.c */
 771
 772 void
 773 lang_print_xnode (file, node, indent)
 774      FILE *file __attribute ((__unused__));
 775      tree node __attribute ((__unused__));
 776      int indent __attribute ((__unused__));
 777 {
 778 }
 779
 780 /* Return the typed-based alias set for T, which may be an expression
 781    or a type.  Return -1 if we don't do anything special.  */
 782
 783 HOST_WIDE_INT
 784 lang_get_alias_set (t)
 785      tree t ATTRIBUTE_UNUSED;
 786 {
 787   return -1;
 788 }