1 /* Java(TM) language-specific utility routines.
2 Copyright (C) 1996-2016 Free Software Foundation, Inc.
3
4 This file is part of GCC.
5
6 GCC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
9 any later version.
10
11 GCC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>.
19
20 Java and all Java-based marks are trademarks or registered trademarks
21 of Sun Microsystems, Inc. in the United States and other countries.
22 The Free Software Foundation is independent of Sun Microsystems, Inc. */
23
24 /* Hacked by Per Bothner <bothner@cygnus.com> February 1996. */
25
26 #include "config.h"
27 #include "system.h"
28 #include "coretypes.h"
29 #include "target.h"
30 #include "tree.h"
31 #include "diagnostic.h"
32 #include "java-tree.h"
33 #include "jcf.h"
34 #include "langhooks.h"
35 #include "langhooks-def.h"
36 #include "tree-dump.h"
37 #include "opts.h"
38 #include "context.h"
39
40 static bool java_init (void);
41 static void java_finish (void);
42 static unsigned int java_option_lang_mask (void);
43 static void java_init_options_struct (struct gcc_options *);
44 static void java_init_options (unsigned int, struct cl_decoded_option *);
45 static bool java_post_options (const char **);
46
47 static bool java_handle_option (size_t, const char *, int, int, location_t,
48 const struct cl_option_handlers *);
49 static void put_decl_string (const char *, int);
50 static void put_decl_node (tree, int);
51 static void java_print_error_function (diagnostic_context *, const char *,
52 diagnostic_info *);
53 static bool java_dump_tree (void *, tree);
54 static void dump_compound_expr (dump_info_p, tree);
55 static bool java_decl_ok_for_sibcall (const_tree);
56
57 static enum classify_record java_classify_record (tree type);
58
59 static tree java_eh_personality (void);
60
61 #ifndef TARGET_OBJECT_SUFFIX
62 # define TARGET_OBJECT_SUFFIX ".o"
63 #endif
64
65 /* Table of machine-independent attributes. */
66 const struct attribute_spec java_attribute_table[] =
67 {
68 { "nonnull", 0, -1, false, true, true,
69 NULL, false },
70 { NULL, 0, 0, false, false, false, NULL, false }
71 };
72
73 /* Used to avoid printing error messages with bogus function
74 prototypes. Starts out false. */
75 static bool inhibit_error_function_printing;
76
77 const char *resource_name;
78
79 /* When nonzero, -Wall was turned on. */
80 int flag_wall = 0;
81
82 /* When nonzero, report use of deprecated classes, methods, or fields. */
83 int flag_deprecated = 1;
84
85 /* When zero, don't optimize static class initialization. This flag shouldn't
86 be tested alone, use STATIC_CLASS_INITIALIZATION_OPTIMIZATION_P instead. */
87 /* FIXME: Make this work with gimplify. */
88 /* int flag_optimize_sci = 0; */
89
90 /* Don't attempt to verify invocations. */
91 int flag_verify_invocations = 0;
92
93 /* When nonzero, print extra version information. */
94 static int v_flag = 0;
95
96 JCF *current_jcf;
97
98 /* Variable controlling how dependency tracking is enabled in
99 java_init. */
100 static int dependency_tracking = 0;
101
102 /* Flag values for DEPENDENCY_TRACKING. */
103 #define DEPEND_SET_FILE 1
104 #define DEPEND_ENABLE 2
105 #define DEPEND_TARGET_SET 4
106 #define DEPEND_FILE_ALREADY_SET 8
107
108 struct GTY(()) language_function {
109 int unused;
110 };
111
112 #undef LANG_HOOKS_NAME
113 #define LANG_HOOKS_NAME "GNU Java"
114 #undef LANG_HOOKS_INIT
115 #define LANG_HOOKS_INIT java_init
116 #undef LANG_HOOKS_FINISH
117 #define LANG_HOOKS_FINISH java_finish
118 #undef LANG_HOOKS_OPTION_LANG_MASK
119 #define LANG_HOOKS_OPTION_LANG_MASK java_option_lang_mask
120 #undef LANG_HOOKS_INIT_OPTIONS_STRUCT
121 #define LANG_HOOKS_INIT_OPTIONS_STRUCT java_init_options_struct
122 #undef LANG_HOOKS_INIT_OPTIONS
123 #define LANG_HOOKS_INIT_OPTIONS java_init_options
124 #undef LANG_HOOKS_HANDLE_OPTION
125 #define LANG_HOOKS_HANDLE_OPTION java_handle_option
126 #undef LANG_HOOKS_POST_OPTIONS
127 #define LANG_HOOKS_POST_OPTIONS java_post_options
128 #undef LANG_HOOKS_PARSE_FILE
129 #define LANG_HOOKS_PARSE_FILE java_parse_file
130 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
131 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL java_dup_lang_specific_decl
132 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
133 #define LANG_HOOKS_DECL_PRINTABLE_NAME lang_printable_name
134 #undef LANG_HOOKS_PRINT_ERROR_FUNCTION
135 #define LANG_HOOKS_PRINT_ERROR_FUNCTION java_print_error_function
136
137 #undef LANG_HOOKS_TYPE_FOR_MODE
138 #define LANG_HOOKS_TYPE_FOR_MODE java_type_for_mode
139 #undef LANG_HOOKS_TYPE_FOR_SIZE
140 #define LANG_HOOKS_TYPE_FOR_SIZE java_type_for_size
141 #undef LANG_HOOKS_CLASSIFY_RECORD
142 #define LANG_HOOKS_CLASSIFY_RECORD java_classify_record
143
144 #undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
145 #define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN java_dump_tree
146
147 #undef LANG_HOOKS_GIMPLIFY_EXPR
148 #define LANG_HOOKS_GIMPLIFY_EXPR java_gimplify_expr
149
150 #undef LANG_HOOKS_DECL_OK_FOR_SIBCALL
151 #define LANG_HOOKS_DECL_OK_FOR_SIBCALL java_decl_ok_for_sibcall
152
153 #undef LANG_HOOKS_SET_DECL_ASSEMBLER_NAME
154 #define LANG_HOOKS_SET_DECL_ASSEMBLER_NAME java_mangle_decl
155
156 #undef LANG_HOOKS_ATTRIBUTE_TABLE
157 #define LANG_HOOKS_ATTRIBUTE_TABLE java_attribute_table
158
159 #undef LANG_HOOKS_EH_PERSONALITY
160 #define LANG_HOOKS_EH_PERSONALITY java_eh_personality
161
162 #undef LANG_HOOKS_EH_USE_CXA_END_CLEANUP
163 #define LANG_HOOKS_EH_USE_CXA_END_CLEANUP true
164
165 /* Each front end provides its own. */
166 struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
167
168 /*
169 * process java-specific compiler command-line options
170 * return false, but do not complain if the option is not recognized.
171 */
172 static bool
java_handle_option(size_t scode,const char * arg,int value,int kind ATTRIBUTE_UNUSED,location_t loc ATTRIBUTE_UNUSED,const struct cl_option_handlers * handlers ATTRIBUTE_UNUSED)173 java_handle_option (size_t scode, const char *arg, int value,
174 int kind ATTRIBUTE_UNUSED, location_t loc ATTRIBUTE_UNUSED,
175 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
176 {
177 enum opt_code code = (enum opt_code) scode;
178
179 switch (code)
180 {
181 case OPT_I:
182 jcf_path_include_arg (arg);
183 break;
184
185 case OPT_M:
186 jcf_dependency_init (1);
187 dependency_tracking |= DEPEND_ENABLE;
188 break;
189
190 case OPT_MD_:
191 jcf_dependency_init (1);
192 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
193 break;
194
195 case OPT_MF:
196 jcf_dependency_set_dep_file (arg);
197 dependency_tracking |= DEPEND_FILE_ALREADY_SET;
198 break;
199
200 case OPT_MM:
201 jcf_dependency_init (0);
202 dependency_tracking |= DEPEND_ENABLE;
203 break;
204
205 case OPT_MMD_:
206 jcf_dependency_init (0);
207 dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
208 break;
209
210 case OPT_MP:
211 jcf_dependency_print_dummies ();
212 break;
213
214 case OPT_MT:
215 jcf_dependency_set_target (arg);
216 dependency_tracking |= DEPEND_TARGET_SET;
217 break;
218
219 case OPT_Wall:
220 flag_wall = value;
221 /* When -Wall given, enable -Wunused. We do this because the C
222 compiler does it, and people expect it. */
223 warn_unused = value;
224 break;
225
226 case OPT_fenable_assertions_:
227 add_enable_assert (arg, value);
228 break;
229
230 case OPT_fenable_assertions:
231 add_enable_assert ("", value);
232 break;
233
234 case OPT_fdisable_assertions_:
235 add_enable_assert (arg, !value);
236 break;
237
238 case OPT_fdisable_assertions:
239 add_enable_assert ("", !value);
240 break;
241
242 case OPT_fassume_compiled_:
243 add_assume_compiled (arg, !value);
244 break;
245
246 case OPT_fassume_compiled:
247 add_assume_compiled ("", !value);
248 break;
249
250 case OPT_fbootclasspath_:
251 jcf_path_bootclasspath_arg (arg);
252 break;
253
254 case OPT_faux_classpath:
255 case OPT_fclasspath_:
256 jcf_path_classpath_arg (arg);
257 break;
258
259 case OPT_fcompile_resource_:
260 resource_name = arg;
261 break;
262
263 case OPT_fdump_:
264 if (!g->get_dumps ()->dump_switch_p (arg))
265 return false;
266 break;
267
268 case OPT_fencoding_:
269 /* Nothing. */
270 break;
271
272 case OPT_fextdirs_:
273 jcf_path_extdirs_arg (arg);
274 break;
275
276 case OPT_foutput_class_dir_:
277 /* FIXME: remove; this is handled by ecj1 now. */
278 break;
279
280 case OPT_version:
281 v_flag = 1;
282 break;
283
284 case OPT_fsource_filename_:
285 java_read_sourcefilenames (arg);
286 break;
287
288 default:
289 if (cl_options[code].flags & CL_Java)
290 break;
291 gcc_unreachable ();
292 }
293
294 return true;
295 }
296
297 /* Global open file. */
298 FILE *finput;
299
300 static bool
java_init(void)301 java_init (void)
302 {
303 /* FIXME: Indirect dispatch isn't yet compatible with static class
304 init optimization. */
305 if (flag_indirect_dispatch)
306 always_initialize_class_p = true;
307
308 if (!flag_indirect_dispatch)
309 flag_indirect_classes = false;
310
311 jcf_path_seal (v_flag);
312
313 java_init_decl_processing ();
314
315 using_eh_for_cleanups ();
316
317 return true;
318 }
319
320 static void
java_finish(void)321 java_finish (void)
322 {
323 jcf_dependency_write ();
324 }
325
326 /* Buffer used by lang_printable_name. */
327 static char *decl_buf = NULL;
328
329 /* Allocated size of decl_buf. */
330 static int decl_buflen = 0;
331
332 /* Length of used part of decl_buf; position for next character. */
333 static int decl_bufpos = 0;
334
335 /* Append the string STR to decl_buf.
336 It length is given by LEN; -1 means the string is nul-terminated. */
337
338 static void
put_decl_string(const char * str,int len)339 put_decl_string (const char *str, int len)
340 {
341 if (len < 0)
342 len = strlen (str);
343 if (decl_bufpos + len >= decl_buflen)
344 {
345 if (decl_buf == NULL)
346 {
347 decl_buflen = len + 100;
348 decl_buf = XNEWVEC (char, decl_buflen);
349 }
350 else
351 {
352 decl_buflen *= 2;
353 decl_buf = XRESIZEVAR (char, decl_buf, decl_buflen);
354 }
355 }
356 strcpy (decl_buf + decl_bufpos, str);
357 decl_bufpos += len;
358 }
359
360 /* Append to decl_buf a printable name for NODE.
361 Depending on VERBOSITY, more information about NODE
362 is printed. Read the comments of decl_printable_name in
363 langhooks.h for more. */
364
365 static void
put_decl_node(tree node,int verbosity)366 put_decl_node (tree node, int verbosity)
367 {
368 int was_pointer = 0;
369 if (TREE_CODE (node) == POINTER_TYPE)
370 {
371 node = TREE_TYPE (node);
372 was_pointer = 1;
373 }
374 if (DECL_P (node) && DECL_NAME (node) != NULL_TREE)
375 {
376 if (TREE_CODE (node) == FUNCTION_DECL)
377 {
378 if (verbosity == 0 && DECL_NAME (node))
379 /* We have been instructed to just print the bare name
380 of the function. */
381 {
382 put_decl_node (DECL_NAME (node), 0);
383 return;
384 }
385
386 /* We want to print the type the DECL belongs to. We don't do
387 that when we handle constructors. */
388 if (! DECL_CONSTRUCTOR_P (node)
389 && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node)
390 /* We want to print qualified DECL names only
391 if verbosity is higher than 1. */
392 && verbosity >= 1)
393 {
394 put_decl_node (TREE_CODE (DECL_CONTEXT (node)) == FUNCTION_DECL
395 ? DECL_CONTEXT (node)
396 : TYPE_NAME (DECL_CONTEXT (node)),
397 verbosity);
398 put_decl_string (".", 1);
399 }
400 if (! DECL_CONSTRUCTOR_P (node))
401 put_decl_node (DECL_NAME (node), verbosity);
402 if (TREE_TYPE (node) != NULL_TREE
403 /* We want to print function parameters only if verbosity
404 is higher than 2. */
405 && verbosity >= 2)
406 {
407 int i = 0;
408 tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
409 if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
410 args = TREE_CHAIN (args);
411 put_decl_string ("(", 1);
412 for ( ; args != NULL_TREE && args != end_params_node;
413 args = TREE_CHAIN (args), i++)
414 {
415 if (i > 0)
416 put_decl_string (",", 1);
417 put_decl_node (TREE_VALUE (args), verbosity);
418 }
419 put_decl_string (")", 1);
420 }
421 }
422 else
423 put_decl_node (DECL_NAME (node), verbosity);
424 }
425 else if (TYPE_P (node) && TYPE_NAME (node) != NULL_TREE)
426 {
427 if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node)
428 /* Print detailed array information only if verbosity is higher
429 than 2. */
430 && verbosity >= 2)
431 {
432 put_decl_node (TYPE_ARRAY_ELEMENT (node), verbosity);
433 put_decl_string("[]", 2);
434 }
435 else if (node == promoted_byte_type_node)
436 put_decl_string ("byte", 4);
437 else if (node == promoted_short_type_node)
438 put_decl_string ("short", 5);
439 else if (node == promoted_char_type_node)
440 put_decl_string ("char", 4);
441 else if (node == promoted_boolean_type_node)
442 put_decl_string ("boolean", 7);
443 else if (node == void_type_node && was_pointer)
444 put_decl_string ("null", 4);
445 else
446 put_decl_node (TYPE_NAME (node), verbosity);
447 }
448 else if (TREE_CODE (node) == IDENTIFIER_NODE)
449 put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
450 else
451 put_decl_string ("<unknown>", -1);
452 }
453
454 /* Return a user-friendly name for DECL.
455 The resulting string is only valid until the next call.
456 The value of the hook decl_printable_name is this function,
457 which is also called directly by java_print_error_function. */
458
459 const char *
lang_printable_name(tree decl,int v)460 lang_printable_name (tree decl, int v)
461 {
462 decl_bufpos = 0;
463 put_decl_node (decl, v);
464 put_decl_string ("", 1);
465 return decl_buf;
466 }
467
468 /* Print on stderr the current class and method context. This function
469 is the value of the hook print_error_function. */
470
471 static GTY(()) tree last_error_function_context;
472 static GTY(()) tree last_error_function;
473 static void
java_print_error_function(diagnostic_context * context ATTRIBUTE_UNUSED,const char * file,diagnostic_info * diagnostic ATTRIBUTE_UNUSED)474 java_print_error_function (diagnostic_context *context ATTRIBUTE_UNUSED,
475 const char *file,
476 diagnostic_info *diagnostic ATTRIBUTE_UNUSED)
477 {
478 /* Don't print error messages with bogus function prototypes. */
479 if (inhibit_error_function_printing)
480 return;
481
482 if (current_function_decl != NULL
483 && DECL_CONTEXT (current_function_decl) != NULL
484 && DECL_CONTEXT (current_function_decl) != last_error_function_context)
485 {
486 if (file)
487 fprintf (stderr, "%s: ", file);
488
489 last_error_function_context = DECL_CONTEXT (current_function_decl);
490 fprintf (stderr, "In class '%s':\n",
491 lang_printable_name (last_error_function_context, 0));
492 }
493 if (last_error_function != current_function_decl)
494 {
495 if (file)
496 fprintf (stderr, "%s: ", file);
497
498 if (current_function_decl == NULL)
499 fprintf (stderr, "At top level:\n");
500 else
501 {
502 const char *name = lang_printable_name (current_function_decl, 2);
503 fprintf (stderr, "In %s '%s':\n",
504 (DECL_CONSTRUCTOR_P (current_function_decl) ? "constructor"
505 : "method"),
506 name);
507 }
508
509 last_error_function = current_function_decl;
510 }
511
512 }
513
514 /* Called to install the PRINT_ERROR_FUNCTION hook differently
515 according to LEVEL. LEVEL is 1 during early parsing, when function
516 prototypes aren't fully resolved. java_print_error_function is set
517 so it doesn't print incomplete function prototypes. When LEVEL is
518 2, function prototypes are fully resolved and can be printed when
519 reporting errors. */
520
521 void
lang_init_source(int level)522 lang_init_source (int level)
523 {
524 inhibit_error_function_printing = (level == 1);
525 }
526
527 static unsigned int
java_option_lang_mask(void)528 java_option_lang_mask (void)
529 {
530 return CL_Java;
531 }
532
533 /* Initialize options structure OPTS. */
534
535 static void
java_init_options_struct(struct gcc_options * opts)536 java_init_options_struct (struct gcc_options *opts)
537 {
538 opts->x_flag_bounds_check = 1;
539 opts->x_flag_exceptions = 1;
540 opts->x_flag_non_call_exceptions = 1;
541
542 /* In Java floating point operations never trap. */
543 opts->x_flag_trapping_math = 0;
544 opts->frontend_set_flag_trapping_math = true;
545
546 /* In Java arithmetic overflow always wraps around. */
547 opts->x_flag_wrapv = 1;
548
549 /* Java requires left-to-right evaluation of subexpressions. */
550 opts->x_flag_evaluation_order = 1;
551
552 /* Java catches NULL pointer exceptions, thus we can not necessarily
553 rely on a pointer having a non-NULL value after a dereference. */
554 opts->x_flag_delete_null_pointer_checks = 0;
555 }
556
557 static void
java_init_options(unsigned int decoded_options_count ATTRIBUTE_UNUSED,struct cl_decoded_option * decoded_options ATTRIBUTE_UNUSED)558 java_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED,
559 struct cl_decoded_option *decoded_options ATTRIBUTE_UNUSED)
560 {
561 jcf_path_init ();
562 }
563
564 /* Post-switch processing. */
565 static bool
java_post_options(const char ** pfilename)566 java_post_options (const char **pfilename)
567 {
568 const char *filename = *pfilename;
569
570 /* Excess precision other than "fast" requires front-end
571 support. */
572 if (flag_excess_precision_cmdline == EXCESS_PRECISION_STANDARD
573 && TARGET_FLT_EVAL_METHOD_NON_DEFAULT)
574 sorry ("-fexcess-precision=standard for Java");
575 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
576
577 /* An absolute requirement: if we're not using indirect dispatch, we
578 must always verify everything. */
579 if (! flag_indirect_dispatch)
580 flag_verify_invocations = true;
581
582 if (flag_reduced_reflection)
583 {
584 if (flag_indirect_dispatch)
585 error ("-findirect-dispatch is incompatible "
586 "with -freduced-reflection");
587 if (flag_jni)
588 error ("-fjni is incompatible with -freduced-reflection");
589 }
590
591 /* Open input file. */
592
593 if (filename == 0 || !strcmp (filename, "-"))
594 {
595 finput = stdin;
596 filename = "stdin";
597
598 if (dependency_tracking)
599 error ("can%'t do dependency tracking with input from stdin");
600 }
601 else
602 {
603 if (dependency_tracking)
604 {
605 const char *dot;
606
607 /* If the target is set and the output filename is set, then
608 there's no processing to do here. Otherwise we must
609 compute one or the other. */
610 if (! ((dependency_tracking & DEPEND_TARGET_SET)
611 && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
612 {
613 dot = strrchr (filename, '.');
614 if (dot == NULL)
615 error ("couldn%'t determine target name for dependency tracking");
616 else
617 {
618 char *buf = XNEWVEC (char, dot - filename +
619 3 + sizeof (TARGET_OBJECT_SUFFIX));
620 strncpy (buf, filename, dot - filename);
621
622 /* If emitting class files, we might have multiple
623 targets. The class generation code takes care of
624 registering them. Otherwise we compute the
625 target name here. */
626 if ((dependency_tracking & DEPEND_TARGET_SET))
627 ; /* Nothing. */
628 else
629 {
630 strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
631 jcf_dependency_set_target (buf);
632 }
633
634 if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
635 ; /* Nothing. */
636 else if ((dependency_tracking & DEPEND_SET_FILE))
637 {
638 strcpy (buf + (dot - filename), ".d");
639 jcf_dependency_set_dep_file (buf);
640 }
641 else
642 jcf_dependency_set_dep_file ("-");
643
644 free (buf);
645 }
646 }
647 }
648 }
649 linemap_add (line_table, LC_ENTER, false, filename, 0);
650 linemap_add (line_table, LC_RENAME, false, "<built-in>", 0);
651
652 /* Initialize the compiler back end. */
653 return false;
654 }
655
656 /* Return either DECL or its known constant value (if it has one). */
657
658 tree
decl_constant_value(tree decl)659 decl_constant_value (tree decl)
660 {
661 if (/* Don't change a variable array bound or initial value to a constant
662 in a place where a variable is invalid. */
663 current_function_decl != 0
664 && ! TREE_THIS_VOLATILE (decl)
665 && TREE_READONLY (decl)
666 && DECL_INITIAL (decl) != 0
667 && TREE_CODE (DECL_INITIAL (decl)) != ERROR_MARK
668 /* This is invalid if initial value is not constant.
669 If it has either a function call, a memory reference,
670 or a variable, then re-evaluating it could give different results. */
671 && TREE_CONSTANT (DECL_INITIAL (decl))
672 /* Check for cases where this is sub-optimal, even though valid. */
673 && TREE_CODE (DECL_INITIAL (decl)) != CONSTRUCTOR)
674 return DECL_INITIAL (decl);
675 return decl;
676 }
677
678 /* Every call to a static constructor has an associated boolean
679 variable which is in the outermost scope of the calling method.
680 This variable is used to avoid multiple calls to the static
681 constructor for each class.
682
683 It looks something like this:
684
685 foo ()
686 {
687 boolean dummy = OtherClass.is_initialized;
688
689 ...
690
691 if (! dummy)
692 OtherClass.initialize();
693
694 ... use OtherClass.data ...
695 }
696
697 Each of these boolean variables has an entry in the
698 DECL_FUNCTION_INIT_TEST_TABLE of a method. When inlining a method
699 we must merge the DECL_FUNCTION_INIT_TEST_TABLE from the function
700 being inlined and create the boolean variables in the outermost
701 scope of the method being inlined into. */
702
703 /* Create a mapping from a boolean variable in a method being inlined
704 to one in the scope of the method being inlined into. */
705
706 int
merge_init_test_initialization(treetreehash_entry ** entry,void * x)707 merge_init_test_initialization (treetreehash_entry **entry, void *x)
708 {
709 struct treetreehash_entry *ite = *entry;
710 splay_tree decl_map = (splay_tree)x;
711 splay_tree_node n;
712 tree *init_test_decl;
713
714 /* See if we have remapped this declaration. If we haven't there's
715 a bug in the inliner. */
716 n = splay_tree_lookup (decl_map, (splay_tree_key) ite->value);
717 gcc_assert (n);
718
719 /* Create a new entry for the class and its remapped boolean
720 variable. If we already have a mapping for this class we've
721 already initialized it, so don't overwrite the value. */
722 init_test_decl = java_treetreehash_new
723 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
724 if (!*init_test_decl)
725 *init_test_decl = (tree)n->value;
726
727 /* This fixes a weird case.
728
729 The front end assumes that once we have called a method that
730 initializes some class, we can assume the class is initialized. It
731 does this by setting the DECL_INITIAL of the init_test_decl for that
732 class, and no initializations are emitted for that class.
733
734 However, what if the method that is supposed to do the initialization
735 is itself inlined in the caller? When expanding the called method
736 we'll assume that the class initialization has already been done,
737 because the DECL_INITIAL of the init_test_decl is set.
738
739 To fix this we remove the DECL_INITIAL (in the caller scope) of all
740 the init_test_decls corresponding to classes initialized by the
741 inlined method. This makes the caller no longer assume that the
742 method being inlined does any class initializations. */
743 DECL_INITIAL (*init_test_decl) = NULL;
744
745 return true;
746 }
747
748 /* Merge the DECL_FUNCTION_INIT_TEST_TABLE from the function we're
749 inlining. */
750
751 void
java_inlining_merge_static_initializers(tree fn,void * decl_map)752 java_inlining_merge_static_initializers (tree fn, void *decl_map)
753 {
754 DECL_FUNCTION_INIT_TEST_TABLE (fn)
755 ->traverse<void *, merge_init_test_initialization> (decl_map);
756 }
757
758 /* Lookup a DECL_FUNCTION_INIT_TEST_TABLE entry in the method we're
759 inlining into. If we already have a corresponding entry in that
760 class we don't need to create another one, so we create a mapping
761 from the variable in the inlined class to the corresponding
762 pre-existing one. */
763
764 int
inline_init_test_initialization(treetreehash_entry ** entry,void * x)765 inline_init_test_initialization (treetreehash_entry **entry, void *x)
766 {
767 struct treetreehash_entry *ite = *entry;
768 splay_tree decl_map = (splay_tree)x;
769
770 tree h = java_treetreehash_find
771 (DECL_FUNCTION_INIT_TEST_TABLE (current_function_decl), ite->key);
772 if (! h)
773 return true;
774 splay_tree_insert (decl_map,
775 (splay_tree_key) ite->value,
776 (splay_tree_value) h);
777 return true;
778 }
779
780 /* Look up the boolean variables in the DECL_FUNCTION_INIT_TEST_TABLE
781 of a method being inlined. For each hone, if we already have a
782 variable associated with the same class in the method being inlined
783 into, create a new mapping for it. */
784
785 void
java_inlining_map_static_initializers(tree fn,void * decl_map)786 java_inlining_map_static_initializers (tree fn, void *decl_map)
787 {
788 DECL_FUNCTION_INIT_TEST_TABLE (fn)
789 ->traverse<void *, inline_init_test_initialization> (decl_map);
790 }
791
792 /* Avoid voluminous output for deep recursion of compound exprs. */
793
794 static void
dump_compound_expr(dump_info_p di,tree t)795 dump_compound_expr (dump_info_p di, tree t)
796 {
797 int i;
798
799 for (i=0; i<2; i++)
800 {
801 switch (TREE_CODE (TREE_OPERAND (t, i)))
802 {
803 case COMPOUND_EXPR:
804 dump_compound_expr (di, TREE_OPERAND (t, i));
805 break;
806
807 default:
808 dump_child ("expr", TREE_OPERAND (t, i));
809 }
810 }
811 }
812
813 static bool
java_dump_tree(void * dump_info,tree t)814 java_dump_tree (void *dump_info, tree t)
815 {
816 enum tree_code code;
817 dump_info_p di = (dump_info_p) dump_info;
818
819 /* Figure out what kind of node this is. */
820 code = TREE_CODE (t);
821
822 switch (code)
823 {
824 case FUNCTION_DECL:
825 dump_child ("args", DECL_ARGUMENTS (t));
826 if (DECL_EXTERNAL (t))
827 dump_string (di, "undefined");
828 if (TREE_PUBLIC (t))
829 dump_string (di, "extern");
830 else
831 dump_string (di, "static");
832 if (DECL_LANG_SPECIFIC (t) && !dump_flag (di, TDF_SLIM, t))
833 dump_child ("inline body", DECL_SAVED_TREE (t));
834 return true;
835
836 case RETURN_EXPR:
837 dump_child ("expr", TREE_OPERAND (t, 0));
838 return true;
839
840 case GOTO_EXPR:
841 dump_child ("goto", TREE_OPERAND (t, 0));
842 return true;
843
844 case LABEL_EXPR:
845 dump_child ("label", TREE_OPERAND (t, 0));
846 return true;
847
848 case BLOCK:
849 if (BLOCK_EXPR_BODY (t))
850 {
851 tree local = BLOCK_VARS (t);
852 while (local)
853 {
854 tree next = TREE_CHAIN (local);
855 dump_child ("var", local);
856 local = next;
857 }
858
859 {
860 tree block = BLOCK_EXPR_BODY (t);
861 dump_child ("body", block);
862 block = TREE_CHAIN (block);
863 }
864 }
865 return true;
866
867 case COMPOUND_EXPR:
868 if (!dump_flag (di, TDF_SLIM, t))
869 return false;
870 dump_compound_expr (di, t);
871 return true;
872
873 default:
874 break;
875 }
876 return false;
877 }
878
879 /* Java calls can't, in general, be sibcalls because we need an
880 accurate stack trace in order to guarantee correct operation of
881 methods such as Class.forName(String) and
882 SecurityManager.getClassContext(). */
883
884 static bool
java_decl_ok_for_sibcall(const_tree decl)885 java_decl_ok_for_sibcall (const_tree decl)
886 {
887 return (decl != NULL && DECL_CONTEXT (decl) == output_class
888 && !DECL_UNINLINABLE (decl));
889 }
890
891 static enum classify_record
java_classify_record(tree type)892 java_classify_record (tree type)
893 {
894 if (! CLASS_P (type))
895 return RECORD_IS_STRUCT;
896
897 if (CLASS_INTERFACE (TYPE_NAME (type)))
898 return RECORD_IS_INTERFACE;
899
900 return RECORD_IS_CLASS;
901 }
902
903 static GTY(()) tree java_eh_personality_decl;
904
905 static tree
java_eh_personality(void)906 java_eh_personality (void)
907 {
908 if (!java_eh_personality_decl)
909 java_eh_personality_decl = build_personality_function ("gcj");
910 return java_eh_personality_decl;
911 }
912
913 #include "gt-java-lang.h"
914