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