1 /* Java(TM) language-specific utility routines.
2 Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
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)
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.
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.
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. */
26 /* Hacked by Per Bothner <bothner@cygnus.com> February 1996. */
34 #include "java-tree.h"
37 #include "langhooks.h"
38 #include "langhooks-def.h"
42 #include "diagnostic.h"
46 const char *const string;
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_print_error_function PARAMS ((diagnostic_context *,
59 static int process_option_with_no PARAMS ((const char *,
60 const struct string_option *,
63 #ifndef TARGET_OBJECT_SUFFIX
64 # define TARGET_OBJECT_SUFFIX ".o"
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. */
71 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
73 const char tree_code_type[] = {
76 #include "java-tree.def"
80 /* Table indexed by tree code giving number of expression
81 operands beyond the fixed part of the node structure.
82 Not used for types or decls. */
84 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
86 const unsigned char tree_code_length[] = {
89 #include "java-tree.def"
93 /* Names of tree components.
94 Used for printing out the tree and error messages. */
95 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
97 const char *const tree_code_name[] = {
100 #include "java-tree.def"
104 /* Used to avoid printing error messages with bogus function
105 prototypes. Starts out false. */
106 static bool inhibit_error_function_printing;
108 int compiling_from_source;
110 char * resource_name;
112 int flag_emit_class_files = 0;
114 /* Nonzero if input file is a file with a list of filenames to compile. */
116 int flag_filelist_file = 0;
118 /* When non zero, we emit xref strings. Values of the flag for xref
119 backends are defined in xref_flag_table, xref.c. */
121 int flag_emit_xref = 0;
123 /* When non zero, -Wall was turned on. */
126 /* When non zero, check for redundant modifier uses. */
127 int flag_redundant = 0;
129 /* When non zero, call a library routine to do integer divisions. */
130 int flag_use_divide_subroutine = 1;
132 /* When non zero, generate code for the Boehm GC. */
133 int flag_use_boehm_gc = 0;
135 /* When non zero, assume the runtime uses a hash table to map an
136 object to its synchronization structure. */
137 int flag_hash_synchronization;
139 /* When non zero, assume all native functions are implemented with
143 /* When non zero, warn when source file is newer than matching class
147 /* When non zero, generate checks for references to NULL. */
148 int flag_check_references = 0;
150 /* The encoding of the source file. */
151 const char *current_encoding = NULL;
153 /* When non zero, report the now deprecated empty statements. */
154 int flag_extraneous_semicolon;
156 /* When non zero, always check for a non gcj generated classes archive. */
157 int flag_force_classes_archive_check;
159 /* When zero, don't optimize static class initialization. This flag shouldn't
160 be tested alone, use STATIC_CLASS_INITIALIZATION_OPTIMIZATION_P instead. */
161 int flag_optimize_sci = 1;
163 /* When non zero, use offset tables for virtual method calls
164 in order to improve binary compatibility. */
165 int flag_indirect_dispatch = 0;
167 /* When zero, don't generate runtime array store checks. */
168 int flag_store_check = 1;
170 /* When non zero, print extra version information. */
171 static int version_flag = 0;
173 /* Table of language-dependent -f options.
174 STRING is the option name. VARIABLE is the address of the variable.
175 ON_VALUE is the value to store in VARIABLE
176 if `-fSTRING' is seen as an option.
177 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
179 static const struct string_option
182 {"emit-class-file", &flag_emit_class_files, 1},
183 {"emit-class-files", &flag_emit_class_files, 1},
184 {"filelist-file", &flag_filelist_file, 1},
185 {"use-divide-subroutine", &flag_use_divide_subroutine, 1},
186 {"use-boehm-gc", &flag_use_boehm_gc, 1},
187 {"hash-synchronization", &flag_hash_synchronization, 1},
188 {"jni", &flag_jni, 1},
189 {"check-references", &flag_check_references, 1},
190 {"force-classes-archive-check", &flag_force_classes_archive_check, 1},
191 {"optimize-static-class-initialization", &flag_optimize_sci, 1 },
192 {"indirect-dispatch", &flag_indirect_dispatch, 1},
193 {"store-check", &flag_store_check, 1}
196 static const struct string_option
199 { "redundant-modifiers", &flag_redundant, 1 },
200 { "extraneous-semicolon", &flag_extraneous_semicolon, 1 },
201 { "out-of-date", &flag_newer, 1 }
206 /* Variable controlling how dependency tracking is enabled in
208 static int dependency_tracking = 0;
210 /* Flag values for DEPENDENCY_TRACKING. */
211 #define DEPEND_SET_FILE 1
212 #define DEPEND_ENABLE 2
213 #define DEPEND_TARGET_SET 4
214 #define DEPEND_FILE_ALREADY_SET 8
216 #undef LANG_HOOKS_NAME
217 #define LANG_HOOKS_NAME "GNU Java"
218 #undef LANG_HOOKS_INIT
219 #define LANG_HOOKS_INIT java_init
220 #undef LANG_HOOKS_FINISH
221 #define LANG_HOOKS_FINISH java_finish
222 #undef LANG_HOOKS_INIT_OPTIONS
223 #define LANG_HOOKS_INIT_OPTIONS java_init_options
224 #undef LANG_HOOKS_DECODE_OPTION
225 #define LANG_HOOKS_DECODE_OPTION java_decode_option
226 #undef LANG_HOOKS_SET_YYDEBUG
227 #define LANG_HOOKS_SET_YYDEBUG java_set_yydebug
228 #undef LANG_HOOKS_PARSE_FILE
229 #define LANG_HOOKS_PARSE_FILE java_parse_file
230 #undef LANG_HOOKS_MARK_TREE
231 #define LANG_HOOKS_MARK_TREE java_mark_tree
232 #undef LANG_HOOKS_MARK_ADDRESSABLE
233 #define LANG_HOOKS_MARK_ADDRESSABLE java_mark_addressable
234 #undef LANG_HOOKS_EXPAND_EXPR
235 #define LANG_HOOKS_EXPAND_EXPR java_expand_expr
236 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
237 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL java_dup_lang_specific_decl
238 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
239 #define LANG_HOOKS_DECL_PRINTABLE_NAME lang_printable_name
240 #undef LANG_HOOKS_PRINT_ERROR_FUNCTION
241 #define LANG_HOOKS_PRINT_ERROR_FUNCTION java_print_error_function
243 #undef LANG_HOOKS_TYPE_FOR_MODE
244 #define LANG_HOOKS_TYPE_FOR_MODE java_type_for_mode
245 #undef LANG_HOOKS_TYPE_FOR_SIZE
246 #define LANG_HOOKS_TYPE_FOR_SIZE java_type_for_size
247 #undef LANG_HOOKS_SIGNED_TYPE
248 #define LANG_HOOKS_SIGNED_TYPE java_signed_type
249 #undef LANG_HOOKS_UNSIGNED_TYPE
250 #define LANG_HOOKS_UNSIGNED_TYPE java_unsigned_type
251 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
252 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE java_signed_or_unsigned_type
254 /* Each front end provides its own. */
255 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
257 /* Process an option that can accept a `no-' form.
258 Return 1 if option found, 0 otherwise. */
260 process_option_with_no (p, table, table_size)
262 const struct string_option *table;
267 for (j = 0; j < table_size; j++)
269 if (!strcmp (p, table[j].string))
271 *table[j].variable = table[j].on_value;
274 if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
275 && ! strcmp (p+3, table[j].string))
277 *table[j].variable = ! table[j].on_value;
286 * process java-specific compiler command-line options
287 * return 0, but do not complain if the option is not recognised.
290 java_decode_option (argc, argv)
291 int argc __attribute__ ((__unused__));
298 if (strcmp (p, "-version") == 0)
301 /* We return 0 so that the caller can process this. */
305 #define CLARG "-fcompile-resource="
306 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
308 resource_name = p + sizeof (CLARG) - 1;
312 #define CLARG "-fassume-compiled="
313 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
315 add_assume_compiled (p + sizeof (CLARG) - 1, 0);
319 #define CLARG "-fno-assume-compiled="
320 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
322 add_assume_compiled (p + sizeof (CLARG) - 1, 1);
326 #define CLARG "-fassume-compiled"
327 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
329 add_assume_compiled ("", 0);
333 #define CLARG "-fno-assume-compiled"
334 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
336 add_assume_compiled ("", 1);
340 #define CLARG "-fCLASSPATH="
341 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
343 jcf_path_classpath_arg (p + sizeof (CLARG) - 1);
347 #define CLARG "-fclasspath="
348 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
350 jcf_path_classpath_arg (p + sizeof (CLARG) - 1);
354 #define CLARG "-fbootclasspath="
355 if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
357 jcf_path_bootclasspath_arg (p + sizeof (CLARG) - 1);
361 else if (strncmp (p, "-I", 2) == 0)
363 jcf_path_include_arg (p + 2);
367 #define ARG "-foutput-class-dir="
368 if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
370 jcf_write_base_directory = p + sizeof (ARG) - 1;
374 #define ARG "-fencoding="
375 if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
377 current_encoding = p + sizeof (ARG) - 1;
382 if (p[0] == '-' && p[1] == 'f')
384 /* Some kind of -f option.
385 P's value is the option sans `-f'.
386 Search for it in the table of options. */
388 if (process_option_with_no (p, lang_f_options,
389 ARRAY_SIZE (lang_f_options)))
391 return dump_switch_p (p);
394 if (strcmp (p, "-Wall") == 0)
398 flag_extraneous_semicolon = 1;
399 /* When -Wall given, enable -Wunused. We do this because the C
400 compiler does it, and people expect it. */
405 if (p[0] == '-' && p[1] == 'W')
407 /* Skip `-W' and see if we accept the option or its `no-' form. */
409 return process_option_with_no (p, lang_W_options,
410 ARRAY_SIZE (lang_W_options));
413 if (strcmp (p, "-MD") == 0)
415 jcf_dependency_init (1);
416 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
419 else if (strcmp (p, "-MMD") == 0)
421 jcf_dependency_init (0);
422 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
425 else if (strcmp (p, "-M") == 0)
427 jcf_dependency_init (1);
428 dependency_tracking |= DEPEND_ENABLE;
431 else if (strcmp (p, "-MM") == 0)
433 jcf_dependency_init (0);
434 dependency_tracking |= DEPEND_ENABLE;
437 else if (strcmp (p, "-MP") == 0)
439 jcf_dependency_print_dummies ();
442 else if (strcmp (p, "-MT") == 0)
444 jcf_dependency_set_target (argv[1]);
445 dependency_tracking |= DEPEND_TARGET_SET;
448 else if (strcmp (p, "-MF") == 0)
450 jcf_dependency_set_dep_file (argv[1]);
451 dependency_tracking |= DEPEND_FILE_ALREADY_SET;
458 /* Global open file. */
463 const char *filename;
466 extern int flag_minimal_debug;
467 flag_minimal_debug = 0;
470 /* Open input file. */
472 if (filename == 0 || !strcmp (filename, "-"))
477 if (dependency_tracking)
478 error ("can't do dependency tracking with input from stdin");
482 if (dependency_tracking)
486 /* If the target is set and the output filename is set, then
487 there's no processing to do here. Otherwise we must
488 compute one or the other. */
489 if (! ((dependency_tracking & DEPEND_TARGET_SET)
490 && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
492 dot = strrchr (filename, '.');
494 error ("couldn't determine target name for dependency tracking");
497 char *buf = (char *) xmalloc (dot - filename +
498 3 + sizeof (TARGET_OBJECT_SUFFIX));
499 strncpy (buf, filename, dot - filename);
501 /* If emitting class files, we might have multiple
502 targets. The class generation code takes care of
503 registering them. Otherwise we compute the
505 if ((dependency_tracking & DEPEND_TARGET_SET))
507 else if (flag_emit_class_files)
508 jcf_dependency_set_target (NULL);
511 strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
512 jcf_dependency_set_target (buf);
515 if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
517 else if ((dependency_tracking & DEPEND_SET_FILE))
519 strcpy (buf + (dot - filename), ".d");
520 jcf_dependency_set_dep_file (buf);
523 jcf_dependency_set_dep_file ("-");
532 jcf_path_seal (version_flag);
534 java_init_decl_processing ();
536 using_eh_for_cleanups ();
544 jcf_dependency_write ();
547 /* Buffer used by lang_printable_name. */
548 static char *decl_buf = NULL;
550 /* Allocated size of decl_buf. */
551 static int decl_buflen = 0;
553 /* Length of used part of decl_buf; position for next character. */
554 static int decl_bufpos = 0;
556 /* Append the string STR to decl_buf.
557 It length is given by LEN; -1 means the string is nul-terminated. */
560 put_decl_string (str, len)
566 if (decl_bufpos + len >= decl_buflen)
568 if (decl_buf == NULL)
570 decl_buflen = len + 100;
571 decl_buf = (char *) xmalloc (decl_buflen);
576 decl_buf = (char *) xrealloc (decl_buf, decl_buflen);
579 strcpy (decl_buf + decl_bufpos, str);
583 /* Append to decl_buf a printable name for NODE. */
590 if (TREE_CODE (node) == POINTER_TYPE)
592 node = TREE_TYPE (node);
595 if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
596 && DECL_NAME (node) != NULL_TREE)
598 if (TREE_CODE (node) == FUNCTION_DECL)
600 /* We want to print the type the DECL belongs to. We don't do
601 that when we handle constructors. */
602 if (! DECL_CONSTRUCTOR_P (node)
603 && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
605 put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
606 put_decl_string (".", 1);
608 if (! DECL_CONSTRUCTOR_P (node))
609 put_decl_node (DECL_NAME (node));
610 if (TREE_TYPE (node) != NULL_TREE)
613 tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
614 if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
615 args = TREE_CHAIN (args);
616 put_decl_string ("(", 1);
617 for ( ; args != end_params_node; args = TREE_CHAIN (args), i++)
620 put_decl_string (",", 1);
621 put_decl_node (TREE_VALUE (args));
623 put_decl_string (")", 1);
627 put_decl_node (DECL_NAME (node));
629 else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
630 && TYPE_NAME (node) != NULL_TREE)
632 if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
634 put_decl_node (TYPE_ARRAY_ELEMENT (node));
635 put_decl_string("[]", 2);
637 else if (node == promoted_byte_type_node)
638 put_decl_string ("byte", 4);
639 else if (node == promoted_short_type_node)
640 put_decl_string ("short", 5);
641 else if (node == promoted_char_type_node)
642 put_decl_string ("char", 4);
643 else if (node == promoted_boolean_type_node)
644 put_decl_string ("boolean", 7);
645 else if (node == void_type_node && was_pointer)
646 put_decl_string ("null", 4);
648 put_decl_node (TYPE_NAME (node));
650 else if (TREE_CODE (node) == IDENTIFIER_NODE)
651 put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
653 put_decl_string ("<unknown>", -1);
656 /* Return a user-friendly name for DECL.
657 The resulting string is only valid until the next call.
658 The value of the hook decl_printable_name is this function,
659 which is also called directly by java_print_error_function. */
662 lang_printable_name (decl, v)
664 int v __attribute__ ((__unused__));
667 put_decl_node (decl);
668 put_decl_string ("", 1);
672 /* Does the same thing that lang_printable_name, but add a leading
673 space to the DECL name string -- With Leading Space. */
676 lang_printable_name_wls (decl, v)
678 int v __attribute__ ((__unused__));
681 put_decl_node (decl);
682 put_decl_string ("", 1);
687 /* Print on stderr the current class and method context. This function
688 is the value of the hook print_error_function. */
691 java_print_error_function (context, file)
692 diagnostic_context *context __attribute__((__unused__));
695 static tree last_error_function_context = NULL_TREE;
696 static tree last_error_function = NULL;
697 static int initialized_p;
699 /* Register LAST_ERROR_FUNCTION_CONTEXT and LAST_ERROR_FUNCTION with
700 the garbage collector. */
703 ggc_add_tree_root (&last_error_function_context, 1);
704 ggc_add_tree_root (&last_error_function, 1);
708 /* Don't print error messages with bogus function prototypes. */
709 if (inhibit_error_function_printing)
712 if (current_function_decl != NULL
713 && DECL_CONTEXT (current_function_decl) != last_error_function_context)
716 fprintf (stderr, "%s: ", file);
718 last_error_function_context = DECL_CONTEXT (current_function_decl);
719 fprintf (stderr, "In class `%s':\n",
720 lang_printable_name (last_error_function_context, 0));
722 if (last_error_function != current_function_decl)
725 fprintf (stderr, "%s: ", file);
727 if (current_function_decl == NULL)
728 fprintf (stderr, "At top level:\n");
731 const char *name = lang_printable_name (current_function_decl, 2);
732 fprintf (stderr, "In %s `%s':\n",
733 (DECL_CONSTRUCTOR_P (current_function_decl) ? "constructor"
738 last_error_function = current_function_decl;
743 /* Called to install the PRINT_ERROR_FUNCTION hook differently
744 according to LEVEL. LEVEL is 1 during early parsing, when function
745 prototypes aren't fully resolved. java_print_error_function is set
746 so it doesn't print incomplete function prototypes. When LEVEL is
747 2, function prototypes are fully resolved and can be printed when
750 void lang_init_source (level)
753 inhibit_error_function_printing = (level == 1);
759 flag_bounds_check = 1;
761 flag_non_call_exceptions = 1;
763 /* In Java floating point operations never trap. */
764 flag_trapping_math = 0;