1 /* Parser for Java(TM) .class files.
2 Copyright (C) 1996, 1998, 1999, 2000, 2001, 2002, 2003
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 /* Written by Per Bothner <bothner@cygnus.com> */
27
28 #include "config.h"
29 #include "system.h"
30 #include "tree.h"
31 #include "real.h"
32 #include "obstack.h"
33 #include "flags.h"
34 #include "java-except.h"
35 #include "input.h"
36 #include "java-tree.h"
37 #include "toplev.h"
38 #include "parse.h"
39 #include "ggc.h"
40 #include "debug.h"
41 #include "assert.h"
42
43 #ifdef HAVE_LOCALE_H
44 #include <locale.h>
45 #endif
46
47 #ifdef HAVE_LANGINFO_CODESET
48 #include <langinfo.h>
49 #endif
50
51 /* A CONSTANT_Utf8 element is converted to an IDENTIFIER_NODE at parse time. */
52 #define JPOOL_UTF(JCF, INDEX) CPOOL_UTF(&(JCF)->cpool, INDEX)
53 #define JPOOL_UTF_LENGTH(JCF, INDEX) IDENTIFIER_LENGTH (JPOOL_UTF (JCF, INDEX))
54 #define JPOOL_UTF_DATA(JCF, INDEX) \
55 ((const unsigned char *) IDENTIFIER_POINTER (JPOOL_UTF (JCF, INDEX)))
56 #define HANDLE_CONSTANT_Utf8(JCF, INDEX, LENGTH) \
57 do { \
58 unsigned char save; unsigned char *text; \
59 JCF_FILL (JCF, (LENGTH)+1); /* Make sure we read 1 byte beyond string. */ \
60 text = (JCF)->read_ptr; \
61 save = text[LENGTH]; \
62 text[LENGTH] = 0; \
63 (JCF)->cpool.data[INDEX] = (jword) get_identifier (text); \
64 text[LENGTH] = save; \
65 JCF_SKIP (JCF, LENGTH); } while (0)
66
67 #include "jcf.h"
68
69 extern struct obstack temporary_obstack;
70
71 /* Set to nonzero value in order to emit class initilization code
72 before static field references. */
73 extern int always_initialize_class_p;
74
75 static GTY(()) tree parse_roots[3];
76
77 /* The FIELD_DECL for the current field. */
78 #define current_field parse_roots[0]
79
80 /* The METHOD_DECL for the current method. */
81 #define current_method parse_roots[1]
82
83 /* A list of file names. */
84 #define current_file_list parse_roots[2]
85
86 /* The Java archive that provides main_class; the main input file. */
87 static struct JCF main_jcf[1];
88
89 static struct ZipFile *localToFile;
90
91 /* Declarations of some functions used here. */
92 static void handle_innerclass_attribute PARAMS ((int count, JCF *));
93 static tree give_name_to_class PARAMS ((JCF *jcf, int index));
94 static void parse_zip_file_entries PARAMS ((void));
95 static void process_zip_dir PARAMS ((FILE *));
96 static void parse_source_file_1 PARAMS ((tree, FILE *));
97 static void parse_source_file_2 PARAMS ((void));
98 static void parse_source_file_3 PARAMS ((void));
99 static void parse_class_file PARAMS ((void));
100 static void set_source_filename PARAMS ((JCF *, int));
101 static void ggc_mark_jcf PARAMS ((void**));
102 static void jcf_parse PARAMS ((struct JCF*));
103 static void load_inner_classes PARAMS ((tree));
104
105 /* Mark (for garbage collection) all the tree nodes that are
106 referenced from JCF's constant pool table. Do that only if the JCF
107 hasn't been marked finished. */
108
109 static void
ggc_mark_jcf(elt)110 ggc_mark_jcf (elt)
111 void **elt;
112 {
113 JCF *jcf = *(JCF**) elt;
114 if (jcf != NULL && !jcf->finished)
115 {
116 CPool *cpool = &jcf->cpool;
117 int size = CPOOL_COUNT(cpool);
118 int index;
119 for (index = 1; index < size; index++)
120 {
121 int tag = JPOOL_TAG (jcf, index);
122 if ((tag & CONSTANT_ResolvedFlag) || tag == CONSTANT_Utf8)
123 ggc_mark_tree ((tree) cpool->data[index]);
124 }
125 }
126 }
127
128 /* Handle "SourceFile" attribute. */
129
130 static void
set_source_filename(jcf,index)131 set_source_filename (jcf, index)
132 JCF *jcf;
133 int index;
134 {
135 tree sfname_id = get_name_constant (jcf, index);
136 const char *sfname = IDENTIFIER_POINTER (sfname_id);
137 if (input_filename != NULL)
138 {
139 int old_len = strlen (input_filename);
140 int new_len = IDENTIFIER_LENGTH (sfname_id);
141 /* Use the current input_filename (derived from the class name)
142 if it has a directory prefix, but otherwise matches sfname. */
143 if (old_len > new_len
144 && strcmp (sfname, input_filename + old_len - new_len) == 0
145 && (input_filename[old_len - new_len - 1] == '/'
146 || input_filename[old_len - new_len - 1] == '\\'))
147 return;
148 }
149 input_filename = sfname;
150 DECL_SOURCE_FILE (TYPE_NAME (current_class)) = sfname;
151 if (current_class == main_class) main_input_filename = input_filename;
152 }
153
154 #define HANDLE_SOURCEFILE(INDEX) set_source_filename (jcf, INDEX)
155
156 #define HANDLE_CLASS_INFO(ACCESS_FLAGS, THIS, SUPER, INTERFACES_COUNT) \
157 { tree super_class = SUPER==0 ? NULL_TREE : get_class_constant (jcf, SUPER); \
158 current_class = give_name_to_class (jcf, THIS); \
159 set_super_info (ACCESS_FLAGS, current_class, super_class, INTERFACES_COUNT);}
160
161 #define HANDLE_CLASS_INTERFACE(INDEX) \
162 add_interface (current_class, get_class_constant (jcf, INDEX))
163
164 #define HANDLE_START_FIELD(ACCESS_FLAGS, NAME, SIGNATURE, ATTRIBUTE_COUNT) \
165 { int sig_index = SIGNATURE; \
166 current_field = add_field (current_class, get_name_constant (jcf, NAME), \
167 parse_signature (jcf, sig_index), ACCESS_FLAGS); \
168 set_java_signature (TREE_TYPE (current_field), JPOOL_UTF (jcf, sig_index)); \
169 if ((ACCESS_FLAGS) & ACC_FINAL) \
170 MAYBE_CREATE_VAR_LANG_DECL_SPECIFIC (current_field); \
171 }
172
173 #define HANDLE_END_FIELDS() \
174 (current_field = NULL_TREE)
175
176 #define HANDLE_CONSTANTVALUE(INDEX) \
177 { tree constant; int index = INDEX; \
178 if (! flag_emit_class_files && JPOOL_TAG (jcf, index) == CONSTANT_String) { \
179 tree name = get_name_constant (jcf, JPOOL_USHORT1 (jcf, index)); \
180 constant = build_utf8_ref (name); \
181 } \
182 else \
183 constant = get_constant (jcf, index); \
184 set_constant_value (current_field, constant); }
185
186 #define HANDLE_METHOD(ACCESS_FLAGS, NAME, SIGNATURE, ATTRIBUTE_COUNT) \
187 (current_method = add_method (current_class, ACCESS_FLAGS, \
188 get_name_constant (jcf, NAME), \
189 get_name_constant (jcf, SIGNATURE)), \
190 DECL_LOCALVARIABLES_OFFSET (current_method) = 0, \
191 DECL_LINENUMBERS_OFFSET (current_method) = 0)
192
193 #define HANDLE_END_METHODS() \
194 { current_method = NULL_TREE; }
195
196 #define HANDLE_CODE_ATTRIBUTE(MAX_STACK, MAX_LOCALS, CODE_LENGTH) \
197 { DECL_MAX_STACK (current_method) = (MAX_STACK); \
198 DECL_MAX_LOCALS (current_method) = (MAX_LOCALS); \
199 DECL_CODE_LENGTH (current_method) = (CODE_LENGTH); \
200 DECL_CODE_OFFSET (current_method) = JCF_TELL (jcf); }
201
202 #define HANDLE_LOCALVARIABLETABLE_ATTRIBUTE(COUNT) \
203 { int n = (COUNT); \
204 DECL_LOCALVARIABLES_OFFSET (current_method) = JCF_TELL (jcf) - 2; \
205 JCF_SKIP (jcf, n * 10); }
206
207 #define HANDLE_LINENUMBERTABLE_ATTRIBUTE(COUNT) \
208 { int n = (COUNT); \
209 DECL_LINENUMBERS_OFFSET (current_method) = JCF_TELL (jcf) - 2; \
210 JCF_SKIP (jcf, n * 4); }
211
212 #define HANDLE_EXCEPTIONS_ATTRIBUTE(COUNT) \
213 { \
214 int n = COUNT; \
215 tree list = DECL_FUNCTION_THROWS (current_method); \
216 while (--n >= 0) \
217 { \
218 tree thrown_class = get_class_constant (jcf, JCF_readu2 (jcf)); \
219 list = tree_cons (NULL_TREE, thrown_class, list); \
220 } \
221 DECL_FUNCTION_THROWS (current_method) = nreverse (list); \
222 }
223
224 /* Link seen inner classes to their outer context and register the
225 inner class to its outer context. They will be later loaded. */
226 #define HANDLE_INNERCLASSES_ATTRIBUTE(COUNT) \
227 handle_innerclass_attribute (COUNT, jcf)
228
229 #define HANDLE_SYNTHETIC_ATTRIBUTE() \
230 { \
231 /* Irrelevant decls should have been nullified by the END macros. \
232 We only handle the `Synthetic' attribute on method DECLs. \
233 DECL_ARTIFICIAL on fields is used for something else (See \
234 PUSH_FIELD in java-tree.h) */ \
235 if (current_method) \
236 DECL_ARTIFICIAL (current_method) = 1; \
237 }
238
239 #define HANDLE_GCJCOMPILED_ATTRIBUTE() \
240 { \
241 if (current_class == object_type_node) \
242 jcf->right_zip = 1; \
243 }
244
245 #include "jcf-reader.c"
246
247 tree
parse_signature(jcf,sig_index)248 parse_signature (jcf, sig_index)
249 JCF *jcf;
250 int sig_index;
251 {
252 if (sig_index <= 0 || sig_index >= JPOOL_SIZE (jcf)
253 || JPOOL_TAG (jcf, sig_index) != CONSTANT_Utf8)
254 abort ();
255 else
256 return parse_signature_string (JPOOL_UTF_DATA (jcf, sig_index),
257 JPOOL_UTF_LENGTH (jcf, sig_index));
258 }
259
260 tree
get_constant(jcf,index)261 get_constant (jcf, index)
262 JCF *jcf;
263 int index;
264 {
265 tree value;
266 int tag;
267 if (index <= 0 || index >= JPOOL_SIZE(jcf))
268 goto bad;
269 tag = JPOOL_TAG (jcf, index);
270 if ((tag & CONSTANT_ResolvedFlag) || tag == CONSTANT_Utf8)
271 return (tree) jcf->cpool.data[index];
272 switch (tag)
273 {
274 case CONSTANT_Integer:
275 {
276 jint num = JPOOL_INT(jcf, index);
277 value = build_int_2 (num, num < 0 ? -1 : 0);
278 TREE_TYPE (value) = int_type_node;
279 break;
280 }
281 case CONSTANT_Long:
282 {
283 unsigned HOST_WIDE_INT num = JPOOL_UINT (jcf, index);
284 HOST_WIDE_INT lo, hi;
285 lshift_double (num, 0, 32, 64, &lo, &hi, 0);
286 num = JPOOL_UINT (jcf, index+1);
287 add_double (lo, hi, num, 0, &lo, &hi);
288 value = build_int_2 (lo, hi);
289 TREE_TYPE (value) = long_type_node;
290 force_fit_type (value, 0);
291 break;
292 }
293
294 case CONSTANT_Float:
295 {
296 jint num = JPOOL_INT(jcf, index);
297 long buf = num;
298 REAL_VALUE_TYPE d;
299
300 real_from_target_fmt (&d, &buf, &ieee_single_format);
301 value = build_real (float_type_node, d);
302 break;
303 }
304
305 case CONSTANT_Double:
306 {
307 long buf[2], lo, hi;
308 REAL_VALUE_TYPE d;
309
310 hi = JPOOL_UINT (jcf, index);
311 lo = JPOOL_UINT (jcf, index+1);
312
313 if (FLOAT_WORDS_BIG_ENDIAN)
314 buf[0] = hi, buf[1] = lo;
315 else
316 buf[0] = lo, buf[1] = hi;
317
318 real_from_target_fmt (&d, buf, &ieee_double_format);
319 value = build_real (double_type_node, d);
320 break;
321 }
322
323 case CONSTANT_String:
324 {
325 tree name = get_name_constant (jcf, JPOOL_USHORT1 (jcf, index));
326 const char *utf8_ptr = IDENTIFIER_POINTER (name);
327 int utf8_len = IDENTIFIER_LENGTH (name);
328 const unsigned char *utf8;
329 int i;
330
331 /* Check for a malformed Utf8 string. */
332 utf8 = (const unsigned char *) utf8_ptr;
333 i = utf8_len;
334 while (i > 0)
335 {
336 int char_len = UT8_CHAR_LENGTH (*utf8);
337 if (char_len < 0 || char_len > 3 || char_len > i)
338 fatal_error ("bad string constant");
339
340 utf8 += char_len;
341 i -= char_len;
342 }
343
344 /* Allocate a new string value. */
345 value = build_string (utf8_len, utf8_ptr);
346 TREE_TYPE (value) = build_pointer_type (string_type_node);
347 }
348 break;
349 default:
350 goto bad;
351 }
352 JPOOL_TAG (jcf, index) = tag | CONSTANT_ResolvedFlag;
353 jcf->cpool.data [index] = (jword) value;
354 return value;
355 bad:
356 internal_error ("bad value constant type %d, index %d",
357 JPOOL_TAG (jcf, index), index);
358 }
359
360 tree
get_name_constant(jcf,index)361 get_name_constant (jcf, index)
362 JCF *jcf;
363 int index;
364 {
365 tree name = get_constant (jcf, index);
366
367 if (TREE_CODE (name) != IDENTIFIER_NODE)
368 abort ();
369
370 return name;
371 }
372
373 /* Handle reading innerclass attributes. If a nonzero entry (denoting
374 a non anonymous entry) is found, We augment the inner class list of
375 the outer context with the newly resolved innerclass. */
376
377 static void
handle_innerclass_attribute(count,jcf)378 handle_innerclass_attribute (count, jcf)
379 int count;
380 JCF *jcf;
381 {
382 int c = (count);
383 while (c--)
384 {
385 /* Read inner_class_info_index. This may be 0 */
386 int icii = JCF_readu2 (jcf);
387 /* Read outer_class_info_index. If the innerclasses attribute
388 entry isn't a member (like an inner class) the value is 0. */
389 int ocii = JCF_readu2 (jcf);
390 /* Read inner_name_index. If the class we're dealing with is
391 an annonymous class, it must be 0. */
392 int ini = JCF_readu2 (jcf);
393 /* Read the access flag. */
394 int acc = JCF_readu2 (jcf);
395 /* If icii is 0, don't try to read the class. */
396 if (icii >= 0)
397 {
398 tree class = get_class_constant (jcf, icii);
399 tree decl = TYPE_NAME (class);
400 /* Skip reading further if ocii is null */
401 if (DECL_P (decl) && !CLASS_COMPLETE_P (decl) && ocii)
402 {
403 tree outer = TYPE_NAME (get_class_constant (jcf, ocii));
404 tree alias = (ini ? get_name_constant (jcf, ini) : NULL_TREE);
405 set_class_decl_access_flags (acc, decl);
406 DECL_CONTEXT (decl) = outer;
407 DECL_INNER_CLASS_LIST (outer) =
408 tree_cons (decl, alias, DECL_INNER_CLASS_LIST (outer));
409 CLASS_COMPLETE_P (decl) = 1;
410 }
411 }
412 }
413 }
414
415 static tree
give_name_to_class(jcf,i)416 give_name_to_class (jcf, i)
417 JCF *jcf;
418 int i;
419 {
420 if (i <= 0 || i >= JPOOL_SIZE (jcf)
421 || JPOOL_TAG (jcf, i) != CONSTANT_Class)
422 abort ();
423 else
424 {
425 tree this_class;
426 int j = JPOOL_USHORT1 (jcf, i);
427 /* verify_constant_pool confirmed that j is a CONSTANT_Utf8. */
428 tree class_name = unmangle_classname (JPOOL_UTF_DATA (jcf, j),
429 JPOOL_UTF_LENGTH (jcf, j));
430 this_class = lookup_class (class_name);
431 input_filename = DECL_SOURCE_FILE (TYPE_NAME (this_class));
432 lineno = 0;
433 if (main_input_filename == NULL && jcf == main_jcf)
434 main_input_filename = input_filename;
435
436 jcf->cpool.data[i] = (jword) this_class;
437 JPOOL_TAG (jcf, i) = CONSTANT_ResolvedClass;
438 return this_class;
439 }
440 }
441
442 /* Get the class of the CONSTANT_Class whose constant pool index is I. */
443
444 tree
get_class_constant(JCF * jcf,int i)445 get_class_constant (JCF *jcf , int i)
446 {
447 tree type;
448 if (i <= 0 || i >= JPOOL_SIZE (jcf)
449 || (JPOOL_TAG (jcf, i) & ~CONSTANT_ResolvedFlag) != CONSTANT_Class)
450 abort ();
451
452 if (JPOOL_TAG (jcf, i) != CONSTANT_ResolvedClass)
453 {
454 int name_index = JPOOL_USHORT1 (jcf, i);
455 /* verify_constant_pool confirmed that name_index is a CONSTANT_Utf8. */
456 const char *name = JPOOL_UTF_DATA (jcf, name_index);
457 int nlength = JPOOL_UTF_LENGTH (jcf, name_index);
458
459 if (name[0] == '[') /* Handle array "classes". */
460 type = TREE_TYPE (parse_signature_string (name, nlength));
461 else
462 {
463 tree cname = unmangle_classname (name, nlength);
464 type = lookup_class (cname);
465 }
466 jcf->cpool.data[i] = (jword) type;
467 JPOOL_TAG (jcf, i) = CONSTANT_ResolvedClass;
468 }
469 else
470 type = (tree) jcf->cpool.data[i];
471 return type;
472 }
473
474 /* Read a class with the fully qualified-name NAME.
475 Return 1 iff we read the requested file.
476 (It is still possible we failed if the file did not
477 define the class it is supposed to.) */
478
479 int
read_class(name)480 read_class (name)
481 tree name;
482 {
483 JCF this_jcf, *jcf;
484 tree icv, class = NULL_TREE;
485 tree save_current_class = current_class;
486 const char *save_input_filename = input_filename;
487 JCF *save_current_jcf = current_jcf;
488
489 if ((icv = IDENTIFIER_CLASS_VALUE (name)) != NULL_TREE)
490 {
491 class = TREE_TYPE (icv);
492 jcf = TYPE_JCF (class);
493 }
494 else
495 jcf = NULL;
496
497 if (jcf == NULL)
498 {
499 this_jcf.zipd = NULL;
500 jcf = &this_jcf;
501 if (find_class (IDENTIFIER_POINTER (name), IDENTIFIER_LENGTH (name),
502 &this_jcf, 1) == 0)
503 return 0;
504 }
505
506 current_jcf = jcf;
507
508 if (current_jcf->java_source)
509 {
510 const char *filename = current_jcf->filename;
511 tree file;
512 FILE *finput;
513 int generate;
514
515 java_parser_context_save_global ();
516 java_push_parser_context ();
517 BUILD_FILENAME_IDENTIFIER_NODE (file, filename);
518 generate = IS_A_COMMAND_LINE_FILENAME_P (file);
519 if (wfl_operator == NULL_TREE)
520 wfl_operator = build_expr_wfl (NULL_TREE, NULL, 0, 0);
521 EXPR_WFL_FILENAME_NODE (wfl_operator) = file;
522 input_filename = ggc_strdup (filename);
523 current_class = NULL_TREE;
524 current_function_decl = NULL_TREE;
525 if (!HAS_BEEN_ALREADY_PARSED_P (file))
526 {
527 if (!(finput = fopen (input_filename, "r")))
528 fatal_io_error ("can't reopen %s", input_filename);
529 parse_source_file_1 (file, finput);
530 parse_source_file_2 ();
531 parse_source_file_3 ();
532 if (fclose (finput))
533 fatal_io_error ("can't close %s", input_filename);
534 }
535 JCF_FINISH (current_jcf);
536 java_pop_parser_context (generate);
537 java_parser_context_restore_global ();
538 }
539 else
540 {
541 if (class == NULL_TREE || ! CLASS_PARSED_P (class))
542 {
543 java_parser_context_save_global ();
544 java_push_parser_context ();
545 current_class = class;
546 input_filename = current_jcf->filename;
547 if (JCF_SEEN_IN_ZIP (current_jcf))
548 read_zip_member(current_jcf,
549 current_jcf->zipd, current_jcf->zipd->zipf);
550 jcf_parse (current_jcf);
551 /* Parsing might change the class, in which case we have to
552 put it back where we found it. */
553 if (current_class != class && icv != NULL_TREE)
554 TREE_TYPE (icv) = current_class;
555 class = current_class;
556 java_pop_parser_context (0);
557 java_parser_context_restore_global ();
558 }
559 layout_class (class);
560 load_inner_classes (class);
561 }
562
563 current_class = save_current_class;
564 input_filename = save_input_filename;
565 current_jcf = save_current_jcf;
566 return 1;
567 }
568
569 /* Load CLASS_OR_NAME. CLASS_OR_NAME can be a mere identifier if
570 called from the parser, otherwise it's a RECORD_TYPE node. If
571 VERBOSE is 1, print error message on failure to load a class. */
572
573 /* Replace calls to load_class by having callers call read_class directly
574 - and then perhaps rename read_class to load_class. FIXME */
575
576 void
load_class(class_or_name,verbose)577 load_class (class_or_name, verbose)
578 tree class_or_name;
579 int verbose;
580 {
581 tree name, saved;
582 int class_loaded;
583
584 /* class_or_name can be the name of the class we want to load */
585 if (TREE_CODE (class_or_name) == IDENTIFIER_NODE)
586 name = class_or_name;
587 /* In some cases, it's a dependency that we process earlier that
588 we though */
589 else if (TREE_CODE (class_or_name) == TREE_LIST)
590 name = TYPE_NAME (TREE_PURPOSE (class_or_name));
591 /* Or it's a type in the making */
592 else
593 name = DECL_NAME (TYPE_NAME (class_or_name));
594
595 saved = name;
596 while (1)
597 {
598 char *separator;
599
600 if ((class_loaded = read_class (name)))
601 break;
602
603 /* We failed loading name. Now consider that we might be looking
604 for a inner class. */
605 if ((separator = strrchr (IDENTIFIER_POINTER (name), '$'))
606 || (separator = strrchr (IDENTIFIER_POINTER (name), '.')))
607 {
608 int c = *separator;
609 *separator = '\0';
610 name = get_identifier (IDENTIFIER_POINTER (name));
611 *separator = c;
612 }
613 /* Otherwise, we failed, we bail. */
614 else
615 break;
616 }
617
618 if (!class_loaded && verbose)
619 error ("cannot find file for class %s", IDENTIFIER_POINTER (saved));
620 }
621
622 /* Parse the .class file JCF. */
623
624 void
jcf_parse(jcf)625 jcf_parse (jcf)
626 JCF* jcf;
627 {
628 int i, code;
629
630 if (jcf_parse_preamble (jcf) != 0)
631 fatal_error ("not a valid Java .class file");
632 code = jcf_parse_constant_pool (jcf);
633 if (code != 0)
634 fatal_error ("error while parsing constant pool");
635 code = verify_constant_pool (jcf);
636 if (code > 0)
637 fatal_error ("error in constant pool entry #%d\n", code);
638
639 jcf_parse_class (jcf);
640 if (main_class == NULL_TREE)
641 main_class = current_class;
642 if (! quiet_flag && TYPE_NAME (current_class))
643 fprintf (stderr, " %s %s",
644 (jcf->access_flags & ACC_INTERFACE) ? "interface" : "class",
645 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (current_class))));
646 if (CLASS_PARSED_P (current_class))
647 {
648 /* FIXME - where was first time */
649 fatal_error ("reading class %s for the second time from %s",
650 IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (current_class))),
651 jcf->filename);
652 }
653 CLASS_PARSED_P (current_class) = 1;
654
655 for (i = 1; i < JPOOL_SIZE(jcf); i++)
656 {
657 switch (JPOOL_TAG (jcf, i))
658 {
659 case CONSTANT_Class:
660 get_class_constant (jcf, i);
661 break;
662 }
663 }
664
665 code = jcf_parse_fields (jcf);
666 if (code != 0)
667 fatal_error ("error while parsing fields");
668 code = jcf_parse_methods (jcf);
669 if (code != 0)
670 fatal_error ("error while parsing methods");
671 code = jcf_parse_final_attributes (jcf);
672 if (code != 0)
673 fatal_error ("error while parsing final attributes");
674
675 /* The fields of class_type_node are already in correct order. */
676 if (current_class != class_type_node && current_class != object_type_node)
677 TYPE_FIELDS (current_class) = nreverse (TYPE_FIELDS (current_class));
678
679 if (current_class == object_type_node)
680 {
681 layout_class_methods (object_type_node);
682 /* If we don't have the right archive, emit a verbose warning.
683 If we're generating bytecode, emit the warning only if
684 -fforce-classes-archive-check was specified. */
685 if (!jcf->right_zip
686 && (!flag_emit_class_files || flag_force_classes_archive_check))
687 fatal_error ("the `java.lang.Object' that was found in `%s' didn't have the special zero-length `gnu.gcj.gcj-compiled' attribute. This generally means that your classpath is incorrectly set. Use `info gcj \"Input Options\"' to see the info page describing how to set the classpath", jcf->filename);
688 }
689 else
690 all_class_list = tree_cons (NULL_TREE,
691 TYPE_NAME (current_class), all_class_list );
692 }
693
694 /* If we came across inner classes, load them now. */
695 static void
load_inner_classes(cur_class)696 load_inner_classes (cur_class)
697 tree cur_class;
698 {
699 tree current;
700 for (current = DECL_INNER_CLASS_LIST (TYPE_NAME (cur_class)); current;
701 current = TREE_CHAIN (current))
702 {
703 tree name = DECL_NAME (TREE_PURPOSE (current));
704 tree decl = IDENTIFIER_GLOBAL_VALUE (name);
705 if (decl && ! CLASS_LOADED_P (TREE_TYPE (decl))
706 && !CLASS_BEING_LAIDOUT (TREE_TYPE (decl)))
707 load_class (name, 1);
708 }
709 }
710
711 void
init_outgoing_cpool()712 init_outgoing_cpool ()
713 {
714 current_constant_pool_data_ref = NULL_TREE;
715 outgoing_cpool = xmalloc (sizeof (struct CPool));
716 memset (outgoing_cpool, 0, sizeof (struct CPool));
717 }
718
719 static void
parse_class_file()720 parse_class_file ()
721 {
722 tree method, field;
723 const char *save_input_filename = input_filename;
724 int save_lineno = lineno;
725
726 java_layout_seen_class_methods ();
727
728 input_filename = DECL_SOURCE_FILE (TYPE_NAME (current_class));
729 lineno = 0;
730 (*debug_hooks->start_source_file) (lineno, input_filename);
731 init_outgoing_cpool ();
732
733 /* Currently we always have to emit calls to _Jv_InitClass when
734 compiling from class files. */
735 always_initialize_class_p = 1;
736
737 for (field = TYPE_FIELDS (current_class);
738 field != NULL_TREE; field = TREE_CHAIN (field))
739 if (FIELD_STATIC (field))
740 DECL_EXTERNAL (field) = 0;
741
742 for (method = TYPE_METHODS (current_class);
743 method != NULL_TREE; method = TREE_CHAIN (method))
744 {
745 JCF *jcf = current_jcf;
746
747 if (METHOD_ABSTRACT (method))
748 continue;
749
750 if (METHOD_NATIVE (method))
751 {
752 tree arg;
753 int decl_max_locals;
754
755 if (! flag_jni)
756 continue;
757 /* We need to compute the DECL_MAX_LOCALS. We need to take
758 the wide types into account too. */
759 for (arg = TYPE_ARG_TYPES (TREE_TYPE (method)), decl_max_locals = 0;
760 arg != end_params_node;
761 arg = TREE_CHAIN (arg), decl_max_locals += 1)
762 {
763 if (TREE_VALUE (arg) && TYPE_IS_WIDE (TREE_VALUE (arg)))
764 decl_max_locals += 1;
765 }
766 DECL_MAX_LOCALS (method) = decl_max_locals;
767 start_java_method (method);
768 give_name_to_locals (jcf);
769 expand_expr_stmt (build_jni_stub (method));
770 end_java_method ();
771 continue;
772 }
773
774 if (DECL_CODE_OFFSET (method) == 0)
775 {
776 current_function_decl = method;
777 error ("missing Code attribute");
778 continue;
779 }
780
781 lineno = 0;
782 if (DECL_LINENUMBERS_OFFSET (method))
783 {
784 register int i;
785 register unsigned char *ptr;
786 JCF_SEEK (jcf, DECL_LINENUMBERS_OFFSET (method));
787 linenumber_count = i = JCF_readu2 (jcf);
788 linenumber_table = ptr = jcf->read_ptr;
789
790 for (ptr += 2; --i >= 0; ptr += 4)
791 {
792 int line = GET_u2 (ptr);
793 /* Set initial lineno lineno to smallest linenumber.
794 * Needs to be set before init_function_start. */
795 if (lineno == 0 || line < lineno)
796 lineno = line;
797 }
798 }
799 else
800 {
801 linenumber_table = NULL;
802 linenumber_count = 0;
803 }
804
805 start_java_method (method);
806
807 note_instructions (jcf, method);
808
809 give_name_to_locals (jcf);
810
811 /* Actually generate code. */
812 expand_byte_code (jcf, method);
813
814 end_java_method ();
815 }
816
817 if (flag_emit_class_files)
818 write_classfile (current_class);
819
820 finish_class ();
821
822 (*debug_hooks->end_source_file) (save_lineno);
823 input_filename = save_input_filename;
824 lineno = save_lineno;
825 }
826
827 /* Parse a source file, as pointed by the current value of INPUT_FILENAME. */
828
829 static void
parse_source_file_1(file,finput)830 parse_source_file_1 (file, finput)
831 tree file;
832 FILE *finput;
833 {
834 int save_error_count = java_error_count;
835 /* Mark the file as parsed */
836 HAS_BEEN_ALREADY_PARSED_P (file) = 1;
837
838 jcf_dependency_add_file (input_filename, 0);
839
840 lang_init_source (1); /* Error msgs have no method prototypes */
841
842 /* There's no point in trying to find the current encoding unless we
843 are going to do something intelligent with it -- hence the test
844 for iconv. */
845 #if defined (HAVE_LOCALE_H) && defined (HAVE_ICONV) && defined (HAVE_LANGINFO_CODESET)
846 setlocale (LC_CTYPE, "");
847 if (current_encoding == NULL)
848 current_encoding = nl_langinfo (CODESET);
849 #endif
850 if (current_encoding == NULL || *current_encoding == '\0')
851 current_encoding = DEFAULT_ENCODING;
852
853 /* Initialize the parser */
854 java_init_lex (finput, current_encoding);
855 java_parse_abort_on_error ();
856
857 java_parse (); /* Parse and build partial tree nodes. */
858 java_parse_abort_on_error ();
859 }
860
861 /* Process a parsed source file, resolving names etc. */
862
863 static void
parse_source_file_2()864 parse_source_file_2 ()
865 {
866 int save_error_count = java_error_count;
867 java_complete_class (); /* Parse unsatisfied class decl. */
868 java_parse_abort_on_error ();
869 }
870
871 static void
parse_source_file_3()872 parse_source_file_3 ()
873 {
874 int save_error_count = java_error_count;
875 java_check_circular_reference (); /* Check on circular references */
876 java_parse_abort_on_error ();
877 java_fix_constructors (); /* Fix the constructors */
878 java_parse_abort_on_error ();
879 java_reorder_fields (); /* Reorder the fields */
880 }
881
882 void
add_predefined_file(name)883 add_predefined_file (name)
884 tree name;
885 {
886 predef_filenames = tree_cons (NULL_TREE, name, predef_filenames);
887 }
888
889 int
predefined_filename_p(node)890 predefined_filename_p (node)
891 tree node;
892 {
893 tree iter;
894
895 for (iter = predef_filenames; iter != NULL_TREE; iter = TREE_CHAIN (iter))
896 {
897 if (TREE_VALUE (iter) == node)
898 return 1;
899 }
900 return 0;
901 }
902
903 void
java_parse_file(set_yydebug)904 java_parse_file (set_yydebug)
905 int set_yydebug ATTRIBUTE_UNUSED;
906 {
907 int filename_count = 0;
908 char *list, *next;
909 tree node;
910 FILE *finput = NULL;
911
912 if (flag_filelist_file)
913 {
914 int avail = 2000;
915 finput = fopen (input_filename, "r");
916 if (finput == NULL)
917 fatal_io_error ("can't open %s", input_filename);
918 list = xmalloc(avail);
919 next = list;
920 for (;;)
921 {
922 int count;
923 if (avail < 500)
924 {
925 count = next - list;
926 avail = 2 * (count + avail);
927 list = xrealloc (list, avail);
928 next = list + count;
929 avail = avail - count;
930 }
931 /* Subtract to to guarantee space for final '\0'. */
932 count = fread (next, 1, avail - 1, finput);
933 if (count == 0)
934 {
935 if (! feof (finput))
936 fatal_io_error ("error closing %s", input_filename);
937 *next = '\0';
938 break;
939 }
940 avail -= count;
941 next += count;
942 }
943 fclose (finput);
944 finput = NULL;
945 }
946 else
947 list = xstrdup (input_filename);
948
949 do
950 {
951 for (next = list; ; )
952 {
953 char ch = *next;
954 if (ch == '\n' || ch == '\r' || ch == '\t' || ch == ' '
955 || ch == '&' /* FIXME */)
956 {
957 if (next == list)
958 {
959 next++;
960 list = next;
961 continue;
962 }
963 else
964 {
965 *next++ = '\0';
966 break;
967 }
968 }
969 if (ch == '\0')
970 {
971 next = NULL;
972 break;
973 }
974 next++;
975 }
976
977 if (list[0])
978 {
979 char *value;
980 tree id;
981 int twice = 0;
982
983 int len = strlen (list);
984
985 obstack_grow0 (&temporary_obstack, list, len);
986 value = obstack_finish (&temporary_obstack);
987
988 filename_count++;
989
990 /* Exclude file that we see twice on the command line. For
991 all files except {Class,Error,Object,RuntimeException,String,
992 Throwable}.java we can rely on maybe_get_identifier. For
993 these files, we need to do a linear search of
994 current_file_list. This search happens only for these
995 files, presumably only when we're recompiling libgcj. */
996
997 if ((id = maybe_get_identifier (value)))
998 {
999 if (predefined_filename_p (id))
1000 {
1001 tree c;
1002 for (c = current_file_list; c; c = TREE_CHAIN (c))
1003 if (TREE_VALUE (c) == id)
1004 twice = 1;
1005 }
1006 else
1007 twice = 1;
1008 }
1009
1010 if (twice)
1011 {
1012 const char *saved_input_filename = input_filename;
1013 input_filename = value;
1014 warning ("source file seen twice on command line and will be compiled only once");
1015 input_filename = saved_input_filename;
1016 }
1017 else
1018 {
1019 BUILD_FILENAME_IDENTIFIER_NODE (node, value);
1020 IS_A_COMMAND_LINE_FILENAME_P (node) = 1;
1021 current_file_list = tree_cons (NULL_TREE, node,
1022 current_file_list);
1023 }
1024 }
1025 list = next;
1026 }
1027 while (next);
1028
1029 if (filename_count == 0)
1030 warning ("no input file specified");
1031
1032 if (resource_name)
1033 {
1034 const char *resource_filename;
1035
1036 /* Only one resource file may be compiled at a time. */
1037 assert (TREE_CHAIN (current_file_list) == NULL);
1038
1039 resource_filename = IDENTIFIER_POINTER (TREE_VALUE (current_file_list));
1040 compile_resource_file (resource_name, resource_filename);
1041
1042 return;
1043 }
1044
1045 current_jcf = main_jcf;
1046 current_file_list = nreverse (current_file_list);
1047 for (node = current_file_list; node; node = TREE_CHAIN (node))
1048 {
1049 unsigned char magic_string[4];
1050 uint32 magic = 0;
1051 tree name = TREE_VALUE (node);
1052
1053 /* Skip already parsed files */
1054 if (HAS_BEEN_ALREADY_PARSED_P (name))
1055 continue;
1056
1057 /* Close previous descriptor, if any */
1058 if (finput && fclose (finput))
1059 fatal_io_error ("can't close input file %s", main_input_filename);
1060
1061 finput = fopen (IDENTIFIER_POINTER (name), "rb");
1062 if (finput == NULL)
1063 fatal_io_error ("can't open %s", IDENTIFIER_POINTER (name));
1064
1065 #ifdef IO_BUFFER_SIZE
1066 setvbuf (finput, xmalloc (IO_BUFFER_SIZE),
1067 _IOFBF, IO_BUFFER_SIZE);
1068 #endif
1069 input_filename = IDENTIFIER_POINTER (name);
1070
1071 /* Figure what kind of file we're dealing with */
1072 if (fread (magic_string, 1, 4, finput) == 4)
1073 {
1074 fseek (finput, 0L, SEEK_SET);
1075 magic = GET_u4 (magic_string);
1076 }
1077 if (magic == 0xcafebabe)
1078 {
1079 CLASS_FILE_P (node) = 1;
1080 current_jcf = ALLOC (sizeof (JCF));
1081 JCF_ZERO (current_jcf);
1082 current_jcf->read_state = finput;
1083 current_jcf->filbuf = jcf_filbuf_from_stdio;
1084 jcf_parse (current_jcf);
1085 TYPE_JCF (current_class) = current_jcf;
1086 CLASS_FROM_CURRENTLY_COMPILED_P (current_class) = 1;
1087 TREE_PURPOSE (node) = current_class;
1088 }
1089 else if (magic == (JCF_u4)ZIPMAGIC)
1090 {
1091 ZIP_FILE_P (node) = 1;
1092 JCF_ZERO (main_jcf);
1093 main_jcf->read_state = finput;
1094 main_jcf->filbuf = jcf_filbuf_from_stdio;
1095 if (open_in_zip (main_jcf, input_filename, NULL, 0) < 0)
1096 fatal_error ("bad zip/jar file %s", IDENTIFIER_POINTER (name));
1097 localToFile = SeenZipFiles;
1098 /* Register all the class defined there. */
1099 process_zip_dir (main_jcf->read_state);
1100 parse_zip_file_entries ();
1101 /*
1102 for (each entry)
1103 CLASS_FROM_CURRENTLY_COMPILED_P (current_class) = 1;
1104 */
1105 }
1106 else
1107 {
1108 JAVA_FILE_P (node) = 1;
1109 java_push_parser_context ();
1110 java_parser_context_save_global ();
1111 parse_source_file_1 (name, finput);
1112 java_parser_context_restore_global ();
1113 java_pop_parser_context (1);
1114 }
1115 }
1116
1117 for (ctxp = ctxp_for_generation; ctxp; ctxp = ctxp->next)
1118 {
1119 input_filename = ctxp->filename;
1120 parse_source_file_2 ();
1121 }
1122
1123 for (ctxp = ctxp_for_generation; ctxp; ctxp = ctxp->next)
1124 {
1125 input_filename = ctxp->filename;
1126 parse_source_file_3 ();
1127 }
1128
1129 for (node = current_file_list; node; node = TREE_CHAIN (node))
1130 {
1131 input_filename = IDENTIFIER_POINTER (TREE_VALUE (node));
1132 if (CLASS_FILE_P (node))
1133 {
1134 current_class = TREE_PURPOSE (node);
1135 current_jcf = TYPE_JCF (current_class);
1136 layout_class (current_class);
1137 load_inner_classes (current_class);
1138 parse_class_file ();
1139 JCF_FINISH (current_jcf);
1140 }
1141 }
1142 input_filename = main_input_filename;
1143
1144 java_expand_classes ();
1145 if (!java_report_errors () && !flag_syntax_only)
1146 {
1147 emit_register_classes ();
1148 if (flag_indirect_dispatch)
1149 emit_offset_symbol_table ();
1150 }
1151 }
1152
1153 /* Process all class entries found in the zip file. */
1154 static void
parse_zip_file_entries(void)1155 parse_zip_file_entries (void)
1156 {
1157 struct ZipDirectory *zdir;
1158 int i;
1159
1160 for (i = 0, zdir = (ZipDirectory *)localToFile->central_directory;
1161 i < localToFile->count; i++, zdir = ZIPDIR_NEXT (zdir))
1162 {
1163 tree class;
1164
1165 /* We don't need to consider those files. */
1166 if (!zdir->size || !zdir->filename_offset)
1167 continue;
1168
1169 class = lookup_class (get_identifier (ZIPDIR_FILENAME (zdir)));
1170 current_jcf = TYPE_JCF (class);
1171 current_class = class;
1172
1173 if ( !CLASS_LOADED_P (class))
1174 {
1175 if (! CLASS_PARSED_P (class))
1176 {
1177 read_zip_member(current_jcf, zdir, localToFile);
1178 jcf_parse (current_jcf);
1179 }
1180 layout_class (current_class);
1181 load_inner_classes (current_class);
1182 }
1183
1184 if (TYPE_SIZE (current_class) != error_mark_node)
1185 {
1186 input_filename = current_jcf->filename;
1187 parse_class_file ();
1188 FREE (current_jcf->buffer); /* No longer necessary */
1189 /* Note: there is a way to free this buffer right after a
1190 class seen in a zip file has been parsed. The idea is the
1191 set its jcf in such a way that buffer will be reallocated
1192 the time the code for the class will be generated. FIXME. */
1193 }
1194 }
1195 }
1196
1197 /* Read all the entries of the zip file, creates a class and a JCF. Sets the
1198 jcf up for further processing and link it to the created class. */
1199
1200 static void
process_zip_dir(FILE * finput)1201 process_zip_dir (FILE *finput)
1202 {
1203 int i;
1204 ZipDirectory *zdir;
1205
1206 for (i = 0, zdir = (ZipDirectory *)localToFile->central_directory;
1207 i < localToFile->count; i++, zdir = ZIPDIR_NEXT (zdir))
1208 {
1209 char *class_name, *file_name, *class_name_in_zip_dir;
1210 tree class;
1211 JCF *jcf;
1212 int j;
1213
1214 class_name_in_zip_dir = ZIPDIR_FILENAME (zdir);
1215
1216 /* We choose to not to process entries with a zero size or entries
1217 not bearing the .class extension. */
1218 if (!zdir->size || !zdir->filename_offset ||
1219 strncmp (&class_name_in_zip_dir[zdir->filename_length-6],
1220 ".class", 6))
1221 {
1222 /* So it will be skipped in parse_zip_file_entries */
1223 zdir->size = 0;
1224 continue;
1225 }
1226
1227 class_name = ALLOC (zdir->filename_length+1-6);
1228 file_name = ALLOC (zdir->filename_length+1);
1229 jcf = ALLOC (sizeof (JCF));
1230 JCF_ZERO (jcf);
1231
1232 strncpy (class_name, class_name_in_zip_dir, zdir->filename_length-6);
1233 class_name [zdir->filename_length-6] = '\0';
1234 strncpy (file_name, class_name_in_zip_dir, zdir->filename_length);
1235 file_name [zdir->filename_length] = '\0';
1236
1237 for (j=0; class_name[j]; j++)
1238 class_name [j] = (class_name [j] == '/' ? '.' : class_name [j]);
1239
1240 /* Yes, we write back the true class name into the zip directory. */
1241 strcpy (class_name_in_zip_dir, class_name);
1242 zdir->filename_length = j;
1243 class = lookup_class (get_identifier (class_name));
1244
1245 jcf->read_state = finput;
1246 jcf->filbuf = jcf_filbuf_from_stdio;
1247 jcf->java_source = 0;
1248 jcf->classname = class_name;
1249 jcf->filename = file_name;
1250 jcf->zipd = zdir;
1251
1252 TYPE_JCF (class) = jcf;
1253 }
1254 }
1255
1256 /* Initialization. */
1257
1258 void
init_jcf_parse()1259 init_jcf_parse ()
1260 {
1261 /* Register roots with the garbage collector. */
1262 ggc_add_root (¤t_jcf, 1, sizeof (JCF), (void (*)(void *))ggc_mark_jcf);
1263
1264 init_src_parse ();
1265 }
1266
1267 #include "gt-java-jcf-parse.h"
1268