Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 817:45c4b1fe45e4
6859411: Bump the HS16 build number to 06
Summary: Update the HS16 build number to 06
Reviewed-by: jcoomes
author | trims |
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date | Fri, 10 Jul 2009 19:10:02 -0700 |
parents | e5b0439ef4ae |
children | 75596850f863 6a93908f268f |
rev | line source |
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0 | 1 /* |
579 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_classFileParser.cpp.incl" | |
27 | |
28 // We generally try to create the oops directly when parsing, rather than allocating | |
29 // temporary data structures and copying the bytes twice. A temporary area is only | |
30 // needed when parsing utf8 entries in the constant pool and when parsing line number | |
31 // tables. | |
32 | |
33 // We add assert in debug mode when class format is not checked. | |
34 | |
35 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE | |
36 #define JAVA_MIN_SUPPORTED_VERSION 45 | |
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37 #define JAVA_MAX_SUPPORTED_VERSION 51 |
0 | 38 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 |
39 | |
40 // Used for two backward compatibility reasons: | |
41 // - to check for new additions to the class file format in JDK1.5 | |
42 // - to check for bug fixes in the format checker in JDK1.5 | |
43 #define JAVA_1_5_VERSION 49 | |
44 | |
45 // Used for backward compatibility reasons: | |
46 // - to check for javac bug fixes that happened after 1.5 | |
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47 // - also used as the max version when running in jdk6 |
0 | 48 #define JAVA_6_VERSION 50 |
49 | |
50 | |
51 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
52 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
53 // this function (_current can be allocated in a register, with scalar | |
54 // replacement of aggregates). The _current pointer is copied back to | |
55 // stream() when this function returns. DON'T call another method within | |
56 // this method that uses stream(). | |
57 ClassFileStream* cfs0 = stream(); | |
58 ClassFileStream cfs1 = *cfs0; | |
59 ClassFileStream* cfs = &cfs1; | |
60 #ifdef ASSERT | |
61 u1* old_current = cfs0->current(); | |
62 #endif | |
63 | |
64 // Used for batching symbol allocations. | |
65 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
66 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
67 int indices[SymbolTable::symbol_alloc_batch_size]; | |
68 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
69 int names_count = 0; | |
70 | |
71 // parsing Index 0 is unused | |
72 for (int index = 1; index < length; index++) { | |
73 // Each of the following case guarantees one more byte in the stream | |
74 // for the following tag or the access_flags following constant pool, | |
75 // so we don't need bounds-check for reading tag. | |
76 u1 tag = cfs->get_u1_fast(); | |
77 switch (tag) { | |
78 case JVM_CONSTANT_Class : | |
79 { | |
80 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
81 u2 name_index = cfs->get_u2_fast(); | |
82 cp->klass_index_at_put(index, name_index); | |
83 } | |
84 break; | |
85 case JVM_CONSTANT_Fieldref : | |
86 { | |
87 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
88 u2 class_index = cfs->get_u2_fast(); | |
89 u2 name_and_type_index = cfs->get_u2_fast(); | |
90 cp->field_at_put(index, class_index, name_and_type_index); | |
91 } | |
92 break; | |
93 case JVM_CONSTANT_Methodref : | |
94 { | |
95 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
96 u2 class_index = cfs->get_u2_fast(); | |
97 u2 name_and_type_index = cfs->get_u2_fast(); | |
98 cp->method_at_put(index, class_index, name_and_type_index); | |
99 } | |
100 break; | |
101 case JVM_CONSTANT_InterfaceMethodref : | |
102 { | |
103 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
104 u2 class_index = cfs->get_u2_fast(); | |
105 u2 name_and_type_index = cfs->get_u2_fast(); | |
106 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
107 } | |
108 break; | |
109 case JVM_CONSTANT_String : | |
110 { | |
111 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
112 u2 string_index = cfs->get_u2_fast(); | |
113 cp->string_index_at_put(index, string_index); | |
114 } | |
115 break; | |
116 case JVM_CONSTANT_Integer : | |
117 { | |
118 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
119 u4 bytes = cfs->get_u4_fast(); | |
120 cp->int_at_put(index, (jint) bytes); | |
121 } | |
122 break; | |
123 case JVM_CONSTANT_Float : | |
124 { | |
125 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
126 u4 bytes = cfs->get_u4_fast(); | |
127 cp->float_at_put(index, *(jfloat*)&bytes); | |
128 } | |
129 break; | |
130 case JVM_CONSTANT_Long : | |
131 // A mangled type might cause you to overrun allocated memory | |
132 guarantee_property(index+1 < length, | |
133 "Invalid constant pool entry %u in class file %s", | |
134 index, CHECK); | |
135 { | |
136 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
137 u8 bytes = cfs->get_u8_fast(); | |
138 cp->long_at_put(index, bytes); | |
139 } | |
140 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
141 break; | |
142 case JVM_CONSTANT_Double : | |
143 // A mangled type might cause you to overrun allocated memory | |
144 guarantee_property(index+1 < length, | |
145 "Invalid constant pool entry %u in class file %s", | |
146 index, CHECK); | |
147 { | |
148 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
149 u8 bytes = cfs->get_u8_fast(); | |
150 cp->double_at_put(index, *(jdouble*)&bytes); | |
151 } | |
152 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
153 break; | |
154 case JVM_CONSTANT_NameAndType : | |
155 { | |
156 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
157 u2 name_index = cfs->get_u2_fast(); | |
158 u2 signature_index = cfs->get_u2_fast(); | |
159 cp->name_and_type_at_put(index, name_index, signature_index); | |
160 } | |
161 break; | |
162 case JVM_CONSTANT_Utf8 : | |
163 { | |
164 cfs->guarantee_more(2, CHECK); // utf8_length | |
165 u2 utf8_length = cfs->get_u2_fast(); | |
166 u1* utf8_buffer = cfs->get_u1_buffer(); | |
167 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
168 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
169 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
170 cfs->skip_u1_fast(utf8_length); | |
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171 |
0 | 172 // Before storing the symbol, make sure it's legal |
173 if (_need_verify) { | |
174 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
175 } | |
176 | |
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177 if (AnonymousClasses && has_cp_patch_at(index)) { |
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178 Handle patch = clear_cp_patch_at(index); |
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179 guarantee_property(java_lang_String::is_instance(patch()), |
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180 "Illegal utf8 patch at %d in class file %s", |
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181 index, CHECK); |
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182 char* str = java_lang_String::as_utf8_string(patch()); |
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183 // (could use java_lang_String::as_symbol instead, but might as well batch them) |
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184 utf8_buffer = (u1*) str; |
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185 utf8_length = (int) strlen(str); |
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186 } |
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187 |
0 | 188 unsigned int hash; |
189 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
190 if (result == NULL) { | |
191 names[names_count] = (char*)utf8_buffer; | |
192 lengths[names_count] = utf8_length; | |
193 indices[names_count] = index; | |
194 hashValues[names_count++] = hash; | |
195 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
196 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
197 names_count = 0; | |
198 } | |
199 } else { | |
200 cp->symbol_at_put(index, result); | |
201 } | |
202 } | |
203 break; | |
204 default: | |
205 classfile_parse_error( | |
206 "Unknown constant tag %u in class file %s", tag, CHECK); | |
207 break; | |
208 } | |
209 } | |
210 | |
211 // Allocate the remaining symbols | |
212 if (names_count > 0) { | |
213 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
214 } | |
215 | |
216 // Copy _current pointer of local copy back to stream(). | |
217 #ifdef ASSERT | |
218 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
219 #endif | |
220 cfs0->set_current(cfs1.current()); | |
221 } | |
222 | |
223 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
224 | |
225 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
226 ClassFileStream* cfs = stream(); | |
227 constantPoolHandle nullHandle; | |
228 | |
229 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
230 u2 length = cfs->get_u2_fast(); | |
231 guarantee_property( | |
232 length >= 1, "Illegal constant pool size %u in class file %s", | |
233 length, CHECK_(nullHandle)); | |
234 constantPoolOop constant_pool = | |
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235 oopFactory::new_constantPool(length, |
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236 methodOopDesc::IsSafeConc, |
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237 CHECK_(nullHandle)); |
0 | 238 constantPoolHandle cp (THREAD, constant_pool); |
239 | |
240 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
241 | |
242 // parsing constant pool entries | |
243 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
244 | |
245 int index = 1; // declared outside of loops for portability | |
246 | |
247 // first verification pass - validate cross references and fixup class and string constants | |
248 for (index = 1; index < length; index++) { // Index 0 is unused | |
249 switch (cp->tag_at(index).value()) { | |
250 case JVM_CONSTANT_Class : | |
251 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
252 break; | |
253 case JVM_CONSTANT_Fieldref : | |
254 // fall through | |
255 case JVM_CONSTANT_Methodref : | |
256 // fall through | |
257 case JVM_CONSTANT_InterfaceMethodref : { | |
258 if (!_need_verify) break; | |
259 int klass_ref_index = cp->klass_ref_index_at(index); | |
260 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
261 check_property(valid_cp_range(klass_ref_index, length) && | |
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262 is_klass_reference(cp, klass_ref_index), |
0 | 263 "Invalid constant pool index %u in class file %s", |
264 klass_ref_index, | |
265 CHECK_(nullHandle)); | |
266 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
267 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
268 "Invalid constant pool index %u in class file %s", | |
269 name_and_type_ref_index, | |
270 CHECK_(nullHandle)); | |
271 break; | |
272 } | |
273 case JVM_CONSTANT_String : | |
274 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
275 break; | |
276 case JVM_CONSTANT_Integer : | |
277 break; | |
278 case JVM_CONSTANT_Float : | |
279 break; | |
280 case JVM_CONSTANT_Long : | |
281 case JVM_CONSTANT_Double : | |
282 index++; | |
283 check_property( | |
284 (index < length && cp->tag_at(index).is_invalid()), | |
285 "Improper constant pool long/double index %u in class file %s", | |
286 index, CHECK_(nullHandle)); | |
287 break; | |
288 case JVM_CONSTANT_NameAndType : { | |
289 if (!_need_verify) break; | |
290 int name_ref_index = cp->name_ref_index_at(index); | |
291 int signature_ref_index = cp->signature_ref_index_at(index); | |
292 check_property( | |
293 valid_cp_range(name_ref_index, length) && | |
294 cp->tag_at(name_ref_index).is_utf8(), | |
295 "Invalid constant pool index %u in class file %s", | |
296 name_ref_index, CHECK_(nullHandle)); | |
297 check_property( | |
298 valid_cp_range(signature_ref_index, length) && | |
299 cp->tag_at(signature_ref_index).is_utf8(), | |
300 "Invalid constant pool index %u in class file %s", | |
301 signature_ref_index, CHECK_(nullHandle)); | |
302 break; | |
303 } | |
304 case JVM_CONSTANT_Utf8 : | |
305 break; | |
306 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
307 case JVM_CONSTANT_UnresolvedClassInError: | |
308 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
309 break; | |
310 case JVM_CONSTANT_ClassIndex : | |
311 { | |
312 int class_index = cp->klass_index_at(index); | |
313 check_property( | |
314 valid_cp_range(class_index, length) && | |
315 cp->tag_at(class_index).is_utf8(), | |
316 "Invalid constant pool index %u in class file %s", | |
317 class_index, CHECK_(nullHandle)); | |
318 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
319 } | |
320 break; | |
321 case JVM_CONSTANT_UnresolvedString : | |
322 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
323 break; | |
324 case JVM_CONSTANT_StringIndex : | |
325 { | |
326 int string_index = cp->string_index_at(index); | |
327 check_property( | |
328 valid_cp_range(string_index, length) && | |
329 cp->tag_at(string_index).is_utf8(), | |
330 "Invalid constant pool index %u in class file %s", | |
331 string_index, CHECK_(nullHandle)); | |
332 symbolOop sym = cp->symbol_at(string_index); | |
333 cp->unresolved_string_at_put(index, sym); | |
334 } | |
335 break; | |
336 default: | |
337 fatal1("bad constant pool tag value %u", cp->tag_at(index).value()); | |
338 ShouldNotReachHere(); | |
339 break; | |
340 } // end of switch | |
341 } // end of for | |
342 | |
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343 if (_cp_patches != NULL) { |
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344 // need to treat this_class specially... |
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345 assert(AnonymousClasses, ""); |
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346 int this_class_index; |
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347 { |
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348 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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349 u1* mark = cfs->current(); |
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350 u2 flags = cfs->get_u2_fast(); |
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351 this_class_index = cfs->get_u2_fast(); |
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352 cfs->set_current(mark); // revert to mark |
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353 } |
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354 |
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355 for (index = 1; index < length; index++) { // Index 0 is unused |
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356 if (has_cp_patch_at(index)) { |
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357 guarantee_property(index != this_class_index, |
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358 "Illegal constant pool patch to self at %d in class file %s", |
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359 index, CHECK_(nullHandle)); |
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360 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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361 } |
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362 } |
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363 // Ensure that all the patches have been used. |
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364 for (index = 0; index < _cp_patches->length(); index++) { |
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365 guarantee_property(!has_cp_patch_at(index), |
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366 "Unused constant pool patch at %d in class file %s", |
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367 index, CHECK_(nullHandle)); |
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368 } |
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369 } |
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370 |
0 | 371 if (!_need_verify) { |
372 return cp; | |
373 } | |
374 | |
375 // second verification pass - checks the strings are of the right format. | |
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376 // but not yet to the other entries |
0 | 377 for (index = 1; index < length; index++) { |
378 jbyte tag = cp->tag_at(index).value(); | |
379 switch (tag) { | |
380 case JVM_CONSTANT_UnresolvedClass: { | |
381 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
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382 // check the name, even if _cp_patches will overwrite it |
0 | 383 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
384 break; | |
385 } | |
386 case JVM_CONSTANT_Fieldref: | |
387 case JVM_CONSTANT_Methodref: | |
388 case JVM_CONSTANT_InterfaceMethodref: { | |
389 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
390 // already verified to be utf8 | |
391 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
392 // already verified to be utf8 | |
393 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
394 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
395 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
396 if (tag == JVM_CONSTANT_Fieldref) { | |
397 verify_legal_field_name(name, CHECK_(nullHandle)); | |
398 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); | |
399 } else { | |
400 verify_legal_method_name(name, CHECK_(nullHandle)); | |
401 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
402 if (tag == JVM_CONSTANT_Methodref) { | |
403 // 4509014: If a class method name begins with '<', it must be "<init>". | |
404 assert(!name.is_null(), "method name in constant pool is null"); | |
405 unsigned int name_len = name->utf8_length(); | |
406 assert(name_len > 0, "bad method name"); // already verified as legal name | |
407 if (name->byte_at(0) == '<') { | |
408 if (name() != vmSymbols::object_initializer_name()) { | |
409 classfile_parse_error( | |
410 "Bad method name at constant pool index %u in class file %s", | |
411 name_ref_index, CHECK_(nullHandle)); | |
412 } | |
413 } | |
414 } | |
415 } | |
416 break; | |
417 } | |
418 } // end of switch | |
419 } // end of for | |
420 | |
421 return cp; | |
422 } | |
423 | |
424 | |
431
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425 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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426 assert(AnonymousClasses, ""); |
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427 BasicType patch_type = T_VOID; |
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428 switch (cp->tag_at(index).value()) { |
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429 |
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430 case JVM_CONSTANT_UnresolvedClass : |
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431 // Patching a class means pre-resolving it. |
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432 // The name in the constant pool is ignored. |
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433 if (patch->klass() == SystemDictionary::class_klass()) { // %%% java_lang_Class::is_instance |
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434 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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435 "Illegal class patch at %d in class file %s", |
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436 index, CHECK); |
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437 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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438 } else { |
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439 guarantee_property(java_lang_String::is_instance(patch()), |
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440 "Illegal class patch at %d in class file %s", |
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441 index, CHECK); |
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442 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK); |
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443 cp->unresolved_klass_at_put(index, name()); |
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444 } |
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445 break; |
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446 |
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447 case JVM_CONSTANT_UnresolvedString : |
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448 // Patching a string means pre-resolving it. |
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449 // The spelling in the constant pool is ignored. |
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450 // The constant reference may be any object whatever. |
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451 // If it is not a real interned string, the constant is referred |
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452 // to as a "pseudo-string", and must be presented to the CP |
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453 // explicitly, because it may require scavenging. |
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454 cp->pseudo_string_at_put(index, patch()); |
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455 break; |
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456 |
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457 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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458 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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459 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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460 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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461 patch_prim: |
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462 { |
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463 jvalue value; |
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464 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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465 guarantee_property(value_type == patch_type, |
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466 "Illegal primitive patch at %d in class file %s", |
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467 index, CHECK); |
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468 switch (value_type) { |
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469 case T_INT: cp->int_at_put(index, value.i); break; |
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470 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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471 case T_LONG: cp->long_at_put(index, value.j); break; |
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472 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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473 default: assert(false, ""); |
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474 } |
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475 } |
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476 break; |
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477 |
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478 default: |
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479 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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480 guarantee_property(!has_cp_patch_at(index), |
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481 "Illegal unexpected patch at %d in class file %s", |
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482 index, CHECK); |
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483 return; |
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484 } |
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485 |
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486 // On fall-through, mark the patch as used. |
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487 clear_cp_patch_at(index); |
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488 } |
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489 |
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490 |
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491 |
0 | 492 class NameSigHash: public ResourceObj { |
493 public: | |
494 symbolOop _name; // name | |
495 symbolOop _sig; // signature | |
496 NameSigHash* _next; // Next entry in hash table | |
497 }; | |
498 | |
499 | |
500 #define HASH_ROW_SIZE 256 | |
501 | |
502 unsigned int hash(symbolOop name, symbolOop sig) { | |
503 unsigned int raw_hash = 0; | |
504 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
505 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
506 | |
507 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
508 } | |
509 | |
510 | |
511 void initialize_hashtable(NameSigHash** table) { | |
512 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
513 } | |
514 | |
515 // Return false if the name/sig combination is found in table. | |
516 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
517 // The old format checker uses heap sort to find duplicates. | |
518 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
519 // of table since we don't expect symbolOop's to move. | |
520 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
521 assert(name != NULL, "name in constant pool is NULL"); | |
522 | |
523 // First lookup for duplicates | |
524 int index = hash(name, sig); | |
525 NameSigHash* entry = table[index]; | |
526 while (entry != NULL) { | |
527 if (entry->_name == name && entry->_sig == sig) { | |
528 return false; | |
529 } | |
530 entry = entry->_next; | |
531 } | |
532 | |
533 // No duplicate is found, allocate a new entry and fill it. | |
534 entry = new NameSigHash(); | |
535 entry->_name = name; | |
536 entry->_sig = sig; | |
537 | |
538 // Insert into hash table | |
539 entry->_next = table[index]; | |
540 table[index] = entry; | |
541 | |
542 return true; | |
543 } | |
544 | |
545 | |
546 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
547 int length, | |
548 Handle class_loader, | |
549 Handle protection_domain, | |
550 PerfTraceTime* vmtimer, | |
551 symbolHandle class_name, | |
552 TRAPS) { | |
553 ClassFileStream* cfs = stream(); | |
554 assert(length > 0, "only called for length>0"); | |
555 objArrayHandle nullHandle; | |
556 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
557 objArrayHandle interfaces (THREAD, interface_oop); | |
558 | |
559 int index; | |
560 for (index = 0; index < length; index++) { | |
561 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
431
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562 KlassHandle interf; |
0 | 563 check_property( |
564 valid_cp_range(interface_index, cp->length()) && | |
431
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565 is_klass_reference(cp, interface_index), |
0 | 566 "Interface name has bad constant pool index %u in class file %s", |
567 interface_index, CHECK_(nullHandle)); | |
431
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568 if (cp->tag_at(interface_index).is_klass()) { |
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569 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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570 } else { |
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571 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); |
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572 |
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573 // Don't need to check legal name because it's checked when parsing constant pool. |
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574 // But need to make sure it's not an array type. |
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575 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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576 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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577 |
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578 vmtimer->suspend(); // do not count recursive loading twice |
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579 // Call resolve_super so classcircularity is checked |
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580 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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581 unresolved_klass, class_loader, protection_domain, |
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582 false, CHECK_(nullHandle)); |
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583 interf = KlassHandle(THREAD, k); |
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584 vmtimer->resume(); |
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585 |
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586 if (LinkWellKnownClasses) // my super type is well known to me |
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587 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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588 } |
0 | 589 |
590 if (!Klass::cast(interf())->is_interface()) { | |
591 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
592 } | |
593 interfaces->obj_at_put(index, interf()); | |
594 } | |
595 | |
596 if (!_need_verify || length <= 1) { | |
597 return interfaces; | |
598 } | |
599 | |
600 // Check if there's any duplicates in interfaces | |
601 ResourceMark rm(THREAD); | |
602 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
603 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
604 initialize_hashtable(interface_names); | |
605 bool dup = false; | |
606 { | |
607 debug_only(No_Safepoint_Verifier nsv;) | |
608 for (index = 0; index < length; index++) { | |
609 klassOop k = (klassOop)interfaces->obj_at(index); | |
610 symbolOop name = instanceKlass::cast(k)->name(); | |
611 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
612 if (!put_after_lookup(name, NULL, interface_names)) { | |
613 dup = true; | |
614 break; | |
615 } | |
616 } | |
617 } | |
618 if (dup) { | |
619 classfile_parse_error("Duplicate interface name in class file %s", | |
620 CHECK_(nullHandle)); | |
621 } | |
622 | |
623 return interfaces; | |
624 } | |
625 | |
626 | |
627 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
628 // Make sure the constant pool entry is of a type appropriate to this field | |
629 guarantee_property( | |
630 (constantvalue_index > 0 && | |
631 constantvalue_index < cp->length()), | |
632 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
633 constantvalue_index, CHECK); | |
634 constantTag value_type = cp->tag_at(constantvalue_index); | |
635 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
636 case T_LONG: | |
637 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
638 break; | |
639 case T_FLOAT: | |
640 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
641 break; | |
642 case T_DOUBLE: | |
643 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
644 break; | |
645 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
646 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
647 break; | |
648 case T_OBJECT: | |
649 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18) | |
650 && (value_type.is_string() || value_type.is_unresolved_string())), | |
651 "Bad string initial value in class file %s", CHECK); | |
652 break; | |
653 default: | |
654 classfile_parse_error( | |
655 "Unable to set initial value %u in class file %s", | |
656 constantvalue_index, CHECK); | |
657 } | |
658 } | |
659 | |
660 | |
661 // Parse attributes for a field. | |
662 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
663 u2 attributes_count, | |
664 bool is_static, u2 signature_index, | |
665 u2* constantvalue_index_addr, | |
666 bool* is_synthetic_addr, | |
667 u2* generic_signature_index_addr, | |
668 typeArrayHandle* field_annotations, | |
669 TRAPS) { | |
670 ClassFileStream* cfs = stream(); | |
671 assert(attributes_count > 0, "length should be greater than 0"); | |
672 u2 constantvalue_index = 0; | |
673 u2 generic_signature_index = 0; | |
674 bool is_synthetic = false; | |
675 u1* runtime_visible_annotations = NULL; | |
676 int runtime_visible_annotations_length = 0; | |
677 u1* runtime_invisible_annotations = NULL; | |
678 int runtime_invisible_annotations_length = 0; | |
679 while (attributes_count--) { | |
680 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
681 u2 attribute_name_index = cfs->get_u2_fast(); | |
682 u4 attribute_length = cfs->get_u4_fast(); | |
683 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
684 cp->tag_at(attribute_name_index).is_utf8(), | |
685 "Invalid field attribute index %u in class file %s", | |
686 attribute_name_index, | |
687 CHECK); | |
688 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
689 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
690 // ignore if non-static | |
691 if (constantvalue_index != 0) { | |
692 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
693 } | |
694 check_property( | |
695 attribute_length == 2, | |
696 "Invalid ConstantValue field attribute length %u in class file %s", | |
697 attribute_length, CHECK); | |
698 constantvalue_index = cfs->get_u2(CHECK); | |
699 if (_need_verify) { | |
700 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
701 } | |
702 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
703 if (attribute_length != 0) { | |
704 classfile_parse_error( | |
705 "Invalid Synthetic field attribute length %u in class file %s", | |
706 attribute_length, CHECK); | |
707 } | |
708 is_synthetic = true; | |
709 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
710 if (attribute_length != 0) { | |
711 classfile_parse_error( | |
712 "Invalid Deprecated field attribute length %u in class file %s", | |
713 attribute_length, CHECK); | |
714 } | |
715 } else if (_major_version >= JAVA_1_5_VERSION) { | |
716 if (attribute_name == vmSymbols::tag_signature()) { | |
717 if (attribute_length != 2) { | |
718 classfile_parse_error( | |
719 "Wrong size %u for field's Signature attribute in class file %s", | |
720 attribute_length, CHECK); | |
721 } | |
722 generic_signature_index = cfs->get_u2(CHECK); | |
723 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
724 runtime_visible_annotations_length = attribute_length; | |
725 runtime_visible_annotations = cfs->get_u1_buffer(); | |
726 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
727 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
728 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
729 runtime_invisible_annotations_length = attribute_length; | |
730 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
731 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
732 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
733 } else { | |
734 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
735 } | |
736 } else { | |
737 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
738 } | |
739 } | |
740 | |
741 *constantvalue_index_addr = constantvalue_index; | |
742 *is_synthetic_addr = is_synthetic; | |
743 *generic_signature_index_addr = generic_signature_index; | |
744 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
745 runtime_visible_annotations_length, | |
746 runtime_invisible_annotations, | |
747 runtime_invisible_annotations_length, | |
748 CHECK); | |
749 return; | |
750 } | |
751 | |
752 | |
753 // Field allocation types. Used for computing field offsets. | |
754 | |
755 enum FieldAllocationType { | |
756 STATIC_OOP, // Oops | |
757 STATIC_BYTE, // Boolean, Byte, char | |
758 STATIC_SHORT, // shorts | |
759 STATIC_WORD, // ints | |
760 STATIC_DOUBLE, // long or double | |
761 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
762 NONSTATIC_OOP, | |
763 NONSTATIC_BYTE, | |
764 NONSTATIC_SHORT, | |
765 NONSTATIC_WORD, | |
766 NONSTATIC_DOUBLE, | |
767 NONSTATIC_ALIGNED_DOUBLE | |
768 }; | |
769 | |
770 | |
771 struct FieldAllocationCount { | |
772 int static_oop_count; | |
773 int static_byte_count; | |
774 int static_short_count; | |
775 int static_word_count; | |
776 int static_double_count; | |
777 int nonstatic_oop_count; | |
778 int nonstatic_byte_count; | |
779 int nonstatic_short_count; | |
780 int nonstatic_word_count; | |
781 int nonstatic_double_count; | |
782 }; | |
783 | |
784 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
785 struct FieldAllocationCount *fac, | |
786 objArrayHandle* fields_annotations, TRAPS) { | |
787 ClassFileStream* cfs = stream(); | |
788 typeArrayHandle nullHandle; | |
789 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
790 u2 length = cfs->get_u2_fast(); | |
791 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
792 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
793 typeArrayHandle fields(THREAD, new_fields); | |
794 | |
795 int index = 0; | |
796 typeArrayHandle field_annotations; | |
797 for (int n = 0; n < length; n++) { | |
798 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
799 | |
800 AccessFlags access_flags; | |
801 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
802 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
803 access_flags.set_flags(flags); | |
804 | |
805 u2 name_index = cfs->get_u2_fast(); | |
806 int cp_size = cp->length(); | |
807 check_property( | |
808 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
809 "Invalid constant pool index %u for field name in class file %s", | |
810 name_index, CHECK_(nullHandle)); | |
811 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
812 verify_legal_field_name(name, CHECK_(nullHandle)); | |
813 | |
814 u2 signature_index = cfs->get_u2_fast(); | |
815 check_property( | |
816 valid_cp_range(signature_index, cp_size) && | |
817 cp->tag_at(signature_index).is_utf8(), | |
818 "Invalid constant pool index %u for field signature in class file %s", | |
819 signature_index, CHECK_(nullHandle)); | |
820 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
821 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
822 | |
823 u2 constantvalue_index = 0; | |
824 bool is_synthetic = false; | |
825 u2 generic_signature_index = 0; | |
826 bool is_static = access_flags.is_static(); | |
827 | |
828 u2 attributes_count = cfs->get_u2_fast(); | |
829 if (attributes_count > 0) { | |
830 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
831 &constantvalue_index, &is_synthetic, | |
832 &generic_signature_index, &field_annotations, | |
833 CHECK_(nullHandle)); | |
834 if (field_annotations.not_null()) { | |
835 if (fields_annotations->is_null()) { | |
836 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
837 *fields_annotations = objArrayHandle(THREAD, md); | |
838 } | |
839 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
840 } | |
841 if (is_synthetic) { | |
842 access_flags.set_is_synthetic(); | |
843 } | |
844 } | |
845 | |
846 fields->short_at_put(index++, access_flags.as_short()); | |
847 fields->short_at_put(index++, name_index); | |
848 fields->short_at_put(index++, signature_index); | |
849 fields->short_at_put(index++, constantvalue_index); | |
850 | |
851 // Remember how many oops we encountered and compute allocation type | |
852 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
853 FieldAllocationType atype; | |
854 if ( is_static ) { | |
855 switch ( type ) { | |
856 case T_BOOLEAN: | |
857 case T_BYTE: | |
858 fac->static_byte_count++; | |
859 atype = STATIC_BYTE; | |
860 break; | |
861 case T_LONG: | |
862 case T_DOUBLE: | |
863 if (Universe::field_type_should_be_aligned(type)) { | |
864 atype = STATIC_ALIGNED_DOUBLE; | |
865 } else { | |
866 atype = STATIC_DOUBLE; | |
867 } | |
868 fac->static_double_count++; | |
869 break; | |
870 case T_CHAR: | |
871 case T_SHORT: | |
872 fac->static_short_count++; | |
873 atype = STATIC_SHORT; | |
874 break; | |
875 case T_FLOAT: | |
876 case T_INT: | |
877 fac->static_word_count++; | |
878 atype = STATIC_WORD; | |
879 break; | |
880 case T_ARRAY: | |
881 case T_OBJECT: | |
882 fac->static_oop_count++; | |
883 atype = STATIC_OOP; | |
884 break; | |
885 case T_ADDRESS: | |
886 case T_VOID: | |
887 default: | |
888 assert(0, "bad field type"); | |
889 } | |
890 } else { | |
891 switch ( type ) { | |
892 case T_BOOLEAN: | |
893 case T_BYTE: | |
894 fac->nonstatic_byte_count++; | |
895 atype = NONSTATIC_BYTE; | |
896 break; | |
897 case T_LONG: | |
898 case T_DOUBLE: | |
899 if (Universe::field_type_should_be_aligned(type)) { | |
900 atype = NONSTATIC_ALIGNED_DOUBLE; | |
901 } else { | |
902 atype = NONSTATIC_DOUBLE; | |
903 } | |
904 fac->nonstatic_double_count++; | |
905 break; | |
906 case T_CHAR: | |
907 case T_SHORT: | |
908 fac->nonstatic_short_count++; | |
909 atype = NONSTATIC_SHORT; | |
910 break; | |
911 case T_FLOAT: | |
912 case T_INT: | |
913 fac->nonstatic_word_count++; | |
914 atype = NONSTATIC_WORD; | |
915 break; | |
916 case T_ARRAY: | |
917 case T_OBJECT: | |
918 fac->nonstatic_oop_count++; | |
919 atype = NONSTATIC_OOP; | |
920 break; | |
921 case T_ADDRESS: | |
922 case T_VOID: | |
923 default: | |
924 assert(0, "bad field type"); | |
925 } | |
926 } | |
927 | |
928 // The correct offset is computed later (all oop fields will be located together) | |
929 // We temporarily store the allocation type in the offset field | |
930 fields->short_at_put(index++, atype); | |
931 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
932 fields->short_at_put(index++, generic_signature_index); | |
933 } | |
934 | |
935 if (_need_verify && length > 1) { | |
936 // Check duplicated fields | |
937 ResourceMark rm(THREAD); | |
938 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
939 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
940 initialize_hashtable(names_and_sigs); | |
941 bool dup = false; | |
942 { | |
943 debug_only(No_Safepoint_Verifier nsv;) | |
944 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
945 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
946 symbolOop name = cp->symbol_at(name_index); | |
947 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
948 symbolOop sig = cp->symbol_at(sig_index); | |
949 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
950 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
951 dup = true; | |
952 break; | |
953 } | |
954 } | |
955 } | |
956 if (dup) { | |
957 classfile_parse_error("Duplicate field name&signature in class file %s", | |
958 CHECK_(nullHandle)); | |
959 } | |
960 } | |
961 | |
962 return fields; | |
963 } | |
964 | |
965 | |
966 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
967 while (length-- > 0) { | |
968 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
969 } | |
970 } | |
971 | |
972 | |
973 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
974 u4 exception_table_length, | |
975 constantPoolHandle cp, | |
976 TRAPS) { | |
977 ClassFileStream* cfs = stream(); | |
978 typeArrayHandle nullHandle; | |
979 | |
980 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
981 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
982 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
983 | |
984 int index = 0; | |
985 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
986 for (unsigned int i = 0; i < exception_table_length; i++) { | |
987 u2 start_pc = cfs->get_u2_fast(); | |
988 u2 end_pc = cfs->get_u2_fast(); | |
989 u2 handler_pc = cfs->get_u2_fast(); | |
990 u2 catch_type_index = cfs->get_u2_fast(); | |
991 // Will check legal target after parsing code array in verifier. | |
992 if (_need_verify) { | |
993 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
994 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
995 guarantee_property(handler_pc < code_length, | |
996 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
997 if (catch_type_index != 0) { | |
998 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
431
a45484ea312d
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changeset
|
999 is_klass_reference(cp, catch_type_index), |
0 | 1000 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
1001 } | |
1002 } | |
1003 exception_handlers->int_at_put(index++, start_pc); | |
1004 exception_handlers->int_at_put(index++, end_pc); | |
1005 exception_handlers->int_at_put(index++, handler_pc); | |
1006 exception_handlers->int_at_put(index++, catch_type_index); | |
1007 } | |
1008 return exception_handlers; | |
1009 } | |
1010 | |
1011 void ClassFileParser::parse_linenumber_table( | |
1012 u4 code_attribute_length, u4 code_length, | |
1013 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
1014 ClassFileStream* cfs = stream(); | |
1015 unsigned int num_entries = cfs->get_u2(CHECK); | |
1016 | |
1017 // Each entry is a u2 start_pc, and a u2 line_number | |
1018 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
1019 | |
1020 // Verify line number attribute and table length | |
1021 check_property( | |
1022 code_attribute_length == sizeof(u2) + length_in_bytes, | |
1023 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
1024 | |
1025 cfs->guarantee_more(length_in_bytes, CHECK); | |
1026 | |
1027 if ((*write_stream) == NULL) { | |
1028 if (length_in_bytes > fixed_buffer_size) { | |
1029 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
1030 } else { | |
1031 (*write_stream) = new CompressedLineNumberWriteStream( | |
1032 linenumbertable_buffer, fixed_buffer_size); | |
1033 } | |
1034 } | |
1035 | |
1036 while (num_entries-- > 0) { | |
1037 u2 bci = cfs->get_u2_fast(); // start_pc | |
1038 u2 line = cfs->get_u2_fast(); // line_number | |
1039 guarantee_property(bci < code_length, | |
1040 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
1041 (*write_stream)->write_pair(bci, line); | |
1042 } | |
1043 } | |
1044 | |
1045 | |
1046 // Class file LocalVariableTable elements. | |
1047 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
1048 public: | |
1049 u2 start_bci; | |
1050 u2 length; | |
1051 u2 name_cp_index; | |
1052 u2 descriptor_cp_index; | |
1053 u2 slot; | |
1054 }; | |
1055 | |
1056 | |
1057 class LVT_Hash: public CHeapObj { | |
1058 public: | |
1059 LocalVariableTableElement *_elem; // element | |
1060 LVT_Hash* _next; // Next entry in hash table | |
1061 }; | |
1062 | |
1063 unsigned int hash(LocalVariableTableElement *elem) { | |
1064 unsigned int raw_hash = elem->start_bci; | |
1065 | |
1066 raw_hash = elem->length + raw_hash * 37; | |
1067 raw_hash = elem->name_cp_index + raw_hash * 37; | |
1068 raw_hash = elem->slot + raw_hash * 37; | |
1069 | |
1070 return raw_hash % HASH_ROW_SIZE; | |
1071 } | |
1072 | |
1073 void initialize_hashtable(LVT_Hash** table) { | |
1074 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1075 table[i] = NULL; | |
1076 } | |
1077 } | |
1078 | |
1079 void clear_hashtable(LVT_Hash** table) { | |
1080 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1081 LVT_Hash* current = table[i]; | |
1082 LVT_Hash* next; | |
1083 while (current != NULL) { | |
1084 next = current->_next; | |
1085 current->_next = NULL; | |
1086 delete(current); | |
1087 current = next; | |
1088 } | |
1089 table[i] = NULL; | |
1090 } | |
1091 } | |
1092 | |
1093 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
1094 LVT_Hash* entry = table[index]; | |
1095 | |
1096 /* | |
1097 * 3-tuple start_bci/length/slot has to be unique key, | |
1098 * so the following comparison seems to be redundant: | |
1099 * && elem->name_cp_index == entry->_elem->name_cp_index | |
1100 */ | |
1101 while (entry != NULL) { | |
1102 if (elem->start_bci == entry->_elem->start_bci | |
1103 && elem->length == entry->_elem->length | |
1104 && elem->name_cp_index == entry->_elem->name_cp_index | |
1105 && elem->slot == entry->_elem->slot | |
1106 ) { | |
1107 return entry; | |
1108 } | |
1109 entry = entry->_next; | |
1110 } | |
1111 return NULL; | |
1112 } | |
1113 | |
1114 // Return false if the local variable is found in table. | |
1115 // Return true if no duplicate is found. | |
1116 // And local variable is added as a new entry in table. | |
1117 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
1118 // First lookup for duplicates | |
1119 int index = hash(elem); | |
1120 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
1121 | |
1122 if (entry != NULL) { | |
1123 return false; | |
1124 } | |
1125 // No duplicate is found, allocate a new entry and fill it. | |
1126 if ((entry = new LVT_Hash()) == NULL) { | |
1127 return false; | |
1128 } | |
1129 entry->_elem = elem; | |
1130 | |
1131 // Insert into hash table | |
1132 entry->_next = table[index]; | |
1133 table[index] = entry; | |
1134 | |
1135 return true; | |
1136 } | |
1137 | |
1138 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
1139 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
1140 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
1141 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
1142 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
1143 lvt->signature_cp_index = 0; | |
1144 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
1145 } | |
1146 | |
1147 // Function is used to parse both attributes: | |
1148 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
1149 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
1150 u2 max_locals, | |
1151 u4 code_attribute_length, | |
1152 constantPoolHandle cp, | |
1153 u2* localvariable_table_length, | |
1154 bool isLVTT, | |
1155 TRAPS) { | |
1156 ClassFileStream* cfs = stream(); | |
1157 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
1158 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
1159 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
1160 // Verify local variable table attribute has right length | |
1161 if (_need_verify) { | |
1162 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
1163 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
1164 } | |
1165 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
1166 assert(localvariable_table_start != NULL, "null local variable table"); | |
1167 if (!_need_verify) { | |
1168 cfs->skip_u2_fast(size); | |
1169 } else { | |
1170 cfs->guarantee_more(size * 2, CHECK_NULL); | |
1171 for(int i = 0; i < (*localvariable_table_length); i++) { | |
1172 u2 start_pc = cfs->get_u2_fast(); | |
1173 u2 length = cfs->get_u2_fast(); | |
1174 u2 name_index = cfs->get_u2_fast(); | |
1175 u2 descriptor_index = cfs->get_u2_fast(); | |
1176 u2 index = cfs->get_u2_fast(); | |
1177 // Assign to a u4 to avoid overflow | |
1178 u4 end_pc = (u4)start_pc + (u4)length; | |
1179 | |
1180 if (start_pc >= code_length) { | |
1181 classfile_parse_error( | |
1182 "Invalid start_pc %u in %s in class file %s", | |
1183 start_pc, tbl_name, CHECK_NULL); | |
1184 } | |
1185 if (end_pc > code_length) { | |
1186 classfile_parse_error( | |
1187 "Invalid length %u in %s in class file %s", | |
1188 length, tbl_name, CHECK_NULL); | |
1189 } | |
1190 int cp_size = cp->length(); | |
1191 guarantee_property( | |
1192 valid_cp_range(name_index, cp_size) && | |
1193 cp->tag_at(name_index).is_utf8(), | |
1194 "Name index %u in %s has bad constant type in class file %s", | |
1195 name_index, tbl_name, CHECK_NULL); | |
1196 guarantee_property( | |
1197 valid_cp_range(descriptor_index, cp_size) && | |
1198 cp->tag_at(descriptor_index).is_utf8(), | |
1199 "Signature index %u in %s has bad constant type in class file %s", | |
1200 descriptor_index, tbl_name, CHECK_NULL); | |
1201 | |
1202 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1203 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
1204 verify_legal_field_name(name, CHECK_NULL); | |
1205 u2 extra_slot = 0; | |
1206 if (!isLVTT) { | |
1207 verify_legal_field_signature(name, sig, CHECK_NULL); | |
1208 | |
1209 // 4894874: check special cases for double and long local variables | |
1210 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
1211 sig() == vmSymbols::type_signature(T_LONG)) { | |
1212 extra_slot = 1; | |
1213 } | |
1214 } | |
1215 guarantee_property((index + extra_slot) < max_locals, | |
1216 "Invalid index %u in %s in class file %s", | |
1217 index, tbl_name, CHECK_NULL); | |
1218 } | |
1219 } | |
1220 return localvariable_table_start; | |
1221 } | |
1222 | |
1223 | |
1224 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
1225 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
1226 ClassFileStream* cfs = stream(); | |
1227 u2 index = 0; // index in the array with long/double occupying two slots | |
1228 u4 i1 = *u1_index; | |
1229 u4 i2 = *u2_index + 1; | |
1230 for(int i = 0; i < array_length; i++) { | |
1231 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
1232 index++; | |
1233 if (tag == ITEM_Long || tag == ITEM_Double) { | |
1234 index++; | |
1235 } else if (tag == ITEM_Object) { | |
1236 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
1237 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
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1238 is_klass_reference(cp, class_index), |
0 | 1239 "Bad class index %u in StackMap in class file %s", |
1240 class_index, CHECK); | |
1241 } else if (tag == ITEM_Uninitialized) { | |
1242 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
1243 guarantee_property( | |
1244 offset < code_length, | |
1245 "Bad uninitialized type offset %u in StackMap in class file %s", | |
1246 offset, CHECK); | |
1247 } else { | |
1248 guarantee_property( | |
1249 tag <= (u1)ITEM_Uninitialized, | |
1250 "Unknown variable type %u in StackMap in class file %s", | |
1251 tag, CHECK); | |
1252 } | |
1253 } | |
1254 u2_array[*u2_index] = index; | |
1255 *u1_index = i1; | |
1256 *u2_index = i2; | |
1257 } | |
1258 | |
1259 typeArrayOop ClassFileParser::parse_stackmap_table( | |
1260 u4 code_attribute_length, TRAPS) { | |
1261 if (code_attribute_length == 0) | |
1262 return NULL; | |
1263 | |
1264 ClassFileStream* cfs = stream(); | |
1265 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
1266 assert(stackmap_table_start != NULL, "null stackmap table"); | |
1267 | |
1268 // check code_attribute_length first | |
1269 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
1270 | |
1271 if (!_need_verify && !DumpSharedSpaces) { | |
1272 return NULL; | |
1273 } | |
1274 | |
1275 typeArrayOop stackmap_data = | |
1276 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
1277 | |
1278 stackmap_data->set_length(code_attribute_length); | |
1279 memcpy((void*)stackmap_data->byte_at_addr(0), | |
1280 (void*)stackmap_table_start, code_attribute_length); | |
1281 return stackmap_data; | |
1282 } | |
1283 | |
1284 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
1285 u4 method_attribute_length, | |
1286 constantPoolHandle cp, TRAPS) { | |
1287 ClassFileStream* cfs = stream(); | |
1288 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
1289 *checked_exceptions_length = cfs->get_u2_fast(); | |
1290 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1291 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
1292 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
1293 if (!_need_verify) { | |
1294 cfs->skip_u2_fast(size); | |
1295 } else { | |
1296 // Verify each value in the checked exception table | |
1297 u2 checked_exception; | |
1298 u2 len = *checked_exceptions_length; | |
1299 cfs->guarantee_more(2 * len, CHECK_NULL); | |
1300 for (int i = 0; i < len; i++) { | |
1301 checked_exception = cfs->get_u2_fast(); | |
1302 check_property( | |
1303 valid_cp_range(checked_exception, cp->length()) && | |
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1304 is_klass_reference(cp, checked_exception), |
0 | 1305 "Exception name has bad type at constant pool %u in class file %s", |
1306 checked_exception, CHECK_NULL); | |
1307 } | |
1308 } | |
1309 // check exceptions attribute length | |
1310 if (_need_verify) { | |
1311 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
1312 sizeof(u2) * size), | |
1313 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
1314 } | |
1315 return checked_exceptions_start; | |
1316 } | |
1317 | |
1318 | |
1319 #define MAX_ARGS_SIZE 255 | |
1320 #define MAX_CODE_SIZE 65535 | |
1321 #define INITIAL_MAX_LVT_NUMBER 256 | |
1322 | |
1323 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
1324 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
1325 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
1326 // entire method attribute is parsed. | |
1327 // | |
1328 // The promoted_flags parameter is used to pass relevant access_flags | |
1329 // from the method back up to the containing klass. These flag values | |
1330 // are added to klass's access_flags. | |
1331 | |
1332 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
1333 AccessFlags *promoted_flags, | |
1334 typeArrayHandle* method_annotations, | |
1335 typeArrayHandle* method_parameter_annotations, | |
1336 typeArrayHandle* method_default_annotations, | |
1337 TRAPS) { | |
1338 ClassFileStream* cfs = stream(); | |
1339 methodHandle nullHandle; | |
1340 ResourceMark rm(THREAD); | |
1341 // Parse fixed parts | |
1342 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
1343 | |
1344 int flags = cfs->get_u2_fast(); | |
1345 u2 name_index = cfs->get_u2_fast(); | |
1346 int cp_size = cp->length(); | |
1347 check_property( | |
1348 valid_cp_range(name_index, cp_size) && | |
1349 cp->tag_at(name_index).is_utf8(), | |
1350 "Illegal constant pool index %u for method name in class file %s", | |
1351 name_index, CHECK_(nullHandle)); | |
1352 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1353 verify_legal_method_name(name, CHECK_(nullHandle)); | |
1354 | |
1355 u2 signature_index = cfs->get_u2_fast(); | |
1356 guarantee_property( | |
1357 valid_cp_range(signature_index, cp_size) && | |
1358 cp->tag_at(signature_index).is_utf8(), | |
1359 "Illegal constant pool index %u for method signature in class file %s", | |
1360 signature_index, CHECK_(nullHandle)); | |
1361 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
1362 | |
1363 AccessFlags access_flags; | |
1364 if (name == vmSymbols::class_initializer_name()) { | |
1365 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
1366 flags = JVM_ACC_STATIC; | |
1367 } else { | |
1368 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
1369 } | |
1370 | |
1371 int args_size = -1; // only used when _need_verify is true | |
1372 if (_need_verify) { | |
1373 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
1374 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
1375 if (args_size > MAX_ARGS_SIZE) { | |
1376 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
1377 } | |
1378 } | |
1379 | |
1380 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
1381 | |
1382 // Default values for code and exceptions attribute elements | |
1383 u2 max_stack = 0; | |
1384 u2 max_locals = 0; | |
1385 u4 code_length = 0; | |
1386 u1* code_start = 0; | |
1387 u2 exception_table_length = 0; | |
1388 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
1389 u2 checked_exceptions_length = 0; | |
1390 u2* checked_exceptions_start = NULL; | |
1391 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
1392 int linenumber_table_length = 0; | |
1393 int total_lvt_length = 0; | |
1394 u2 lvt_cnt = 0; | |
1395 u2 lvtt_cnt = 0; | |
1396 bool lvt_allocated = false; | |
1397 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1398 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1399 u2* localvariable_table_length; | |
1400 u2** localvariable_table_start; | |
1401 u2* localvariable_type_table_length; | |
1402 u2** localvariable_type_table_start; | |
1403 bool parsed_code_attribute = false; | |
1404 bool parsed_checked_exceptions_attribute = false; | |
1405 bool parsed_stackmap_attribute = false; | |
1406 // stackmap attribute - JDK1.5 | |
1407 typeArrayHandle stackmap_data; | |
1408 u2 generic_signature_index = 0; | |
1409 u1* runtime_visible_annotations = NULL; | |
1410 int runtime_visible_annotations_length = 0; | |
1411 u1* runtime_invisible_annotations = NULL; | |
1412 int runtime_invisible_annotations_length = 0; | |
1413 u1* runtime_visible_parameter_annotations = NULL; | |
1414 int runtime_visible_parameter_annotations_length = 0; | |
1415 u1* runtime_invisible_parameter_annotations = NULL; | |
1416 int runtime_invisible_parameter_annotations_length = 0; | |
1417 u1* annotation_default = NULL; | |
1418 int annotation_default_length = 0; | |
1419 | |
1420 // Parse code and exceptions attribute | |
1421 u2 method_attributes_count = cfs->get_u2_fast(); | |
1422 while (method_attributes_count--) { | |
1423 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
1424 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
1425 u4 method_attribute_length = cfs->get_u4_fast(); | |
1426 check_property( | |
1427 valid_cp_range(method_attribute_name_index, cp_size) && | |
1428 cp->tag_at(method_attribute_name_index).is_utf8(), | |
1429 "Invalid method attribute name index %u in class file %s", | |
1430 method_attribute_name_index, CHECK_(nullHandle)); | |
1431 | |
1432 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
1433 if (method_attribute_name == vmSymbols::tag_code()) { | |
1434 // Parse Code attribute | |
1435 if (_need_verify) { | |
1436 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
1437 "Code attribute in native or abstract methods in class file %s", | |
1438 CHECK_(nullHandle)); | |
1439 } | |
1440 if (parsed_code_attribute) { | |
1441 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
1442 } | |
1443 parsed_code_attribute = true; | |
1444 | |
1445 // Stack size, locals size, and code size | |
1446 if (_major_version == 45 && _minor_version <= 2) { | |
1447 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
1448 max_stack = cfs->get_u1_fast(); | |
1449 max_locals = cfs->get_u1_fast(); | |
1450 code_length = cfs->get_u2_fast(); | |
1451 } else { | |
1452 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
1453 max_stack = cfs->get_u2_fast(); | |
1454 max_locals = cfs->get_u2_fast(); | |
1455 code_length = cfs->get_u4_fast(); | |
1456 } | |
1457 if (_need_verify) { | |
1458 guarantee_property(args_size <= max_locals, | |
1459 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
1460 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
1461 "Invalid method Code length %u in class file %s", | |
1462 code_length, CHECK_(nullHandle)); | |
1463 } | |
1464 // Code pointer | |
1465 code_start = cfs->get_u1_buffer(); | |
1466 assert(code_start != NULL, "null code start"); | |
1467 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
1468 cfs->skip_u1_fast(code_length); | |
1469 | |
1470 // Exception handler table | |
1471 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
1472 exception_table_length = cfs->get_u2_fast(); | |
1473 if (exception_table_length > 0) { | |
1474 exception_handlers = | |
1475 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
1476 } | |
1477 | |
1478 // Parse additional attributes in code attribute | |
1479 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
1480 u2 code_attributes_count = cfs->get_u2_fast(); | |
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1481 |
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1482 unsigned int calculated_attribute_length = 0; |
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1483 |
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1484 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1485 calculated_attribute_length = |
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1486 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1487 } else { |
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1488 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1489 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1490 } |
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1491 calculated_attribute_length += |
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1492 code_length + |
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1493 sizeof(exception_table_length) + |
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1494 sizeof(code_attributes_count) + |
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1495 exception_table_length * |
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1496 ( sizeof(u2) + // start_pc |
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1497 sizeof(u2) + // end_pc |
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1498 sizeof(u2) + // handler_pc |
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1499 sizeof(u2) ); // catch_type_index |
0 | 1500 |
1501 while (code_attributes_count--) { | |
1502 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
1503 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
1504 u4 code_attribute_length = cfs->get_u4_fast(); | |
1505 calculated_attribute_length += code_attribute_length + | |
1506 sizeof(code_attribute_name_index) + | |
1507 sizeof(code_attribute_length); | |
1508 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
1509 cp->tag_at(code_attribute_name_index).is_utf8(), | |
1510 "Invalid code attribute name index %u in class file %s", | |
1511 code_attribute_name_index, | |
1512 CHECK_(nullHandle)); | |
1513 if (LoadLineNumberTables && | |
1514 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
1515 // Parse and compress line number table | |
1516 parse_linenumber_table(code_attribute_length, code_length, | |
1517 &linenumber_table, CHECK_(nullHandle)); | |
1518 | |
1519 } else if (LoadLocalVariableTables && | |
1520 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
1521 // Parse local variable table | |
1522 if (!lvt_allocated) { | |
1523 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1524 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1525 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1526 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1527 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1528 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1529 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1530 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1531 lvt_allocated = true; | |
1532 } | |
1533 if (lvt_cnt == max_lvt_cnt) { | |
1534 max_lvt_cnt <<= 1; | |
1535 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
1536 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
1537 } | |
1538 localvariable_table_start[lvt_cnt] = | |
1539 parse_localvariable_table(code_length, | |
1540 max_locals, | |
1541 code_attribute_length, | |
1542 cp, | |
1543 &localvariable_table_length[lvt_cnt], | |
1544 false, // is not LVTT | |
1545 CHECK_(nullHandle)); | |
1546 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
1547 lvt_cnt++; | |
1548 } else if (LoadLocalVariableTypeTables && | |
1549 _major_version >= JAVA_1_5_VERSION && | |
1550 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
1551 if (!lvt_allocated) { | |
1552 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1553 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1554 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1555 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1556 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1557 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1558 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1559 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1560 lvt_allocated = true; | |
1561 } | |
1562 // Parse local variable type table | |
1563 if (lvtt_cnt == max_lvtt_cnt) { | |
1564 max_lvtt_cnt <<= 1; | |
1565 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
1566 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
1567 } | |
1568 localvariable_type_table_start[lvtt_cnt] = | |
1569 parse_localvariable_table(code_length, | |
1570 max_locals, | |
1571 code_attribute_length, | |
1572 cp, | |
1573 &localvariable_type_table_length[lvtt_cnt], | |
1574 true, // is LVTT | |
1575 CHECK_(nullHandle)); | |
1576 lvtt_cnt++; | |
1577 } else if (UseSplitVerifier && | |
1578 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
1579 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
1580 // Stack map is only needed by the new verifier in JDK1.5. | |
1581 if (parsed_stackmap_attribute) { | |
1582 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
1583 } | |
1584 typeArrayOop sm = | |
1585 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
1586 stackmap_data = typeArrayHandle(THREAD, sm); | |
1587 parsed_stackmap_attribute = true; | |
1588 } else { | |
1589 // Skip unknown attributes | |
1590 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
1591 } | |
1592 } | |
1593 // check method attribute length | |
1594 if (_need_verify) { | |
1595 guarantee_property(method_attribute_length == calculated_attribute_length, | |
1596 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
1597 } | |
1598 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
1599 // Parse Exceptions attribute | |
1600 if (parsed_checked_exceptions_attribute) { | |
1601 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
1602 } | |
1603 parsed_checked_exceptions_attribute = true; | |
1604 checked_exceptions_start = | |
1605 parse_checked_exceptions(&checked_exceptions_length, | |
1606 method_attribute_length, | |
1607 cp, CHECK_(nullHandle)); | |
1608 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
1609 if (method_attribute_length != 0) { | |
1610 classfile_parse_error( | |
1611 "Invalid Synthetic method attribute length %u in class file %s", | |
1612 method_attribute_length, CHECK_(nullHandle)); | |
1613 } | |
1614 // Should we check that there hasn't already been a synthetic attribute? | |
1615 access_flags.set_is_synthetic(); | |
1616 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
1617 if (method_attribute_length != 0) { | |
1618 classfile_parse_error( | |
1619 "Invalid Deprecated method attribute length %u in class file %s", | |
1620 method_attribute_length, CHECK_(nullHandle)); | |
1621 } | |
1622 } else if (_major_version >= JAVA_1_5_VERSION) { | |
1623 if (method_attribute_name == vmSymbols::tag_signature()) { | |
1624 if (method_attribute_length != 2) { | |
1625 classfile_parse_error( | |
1626 "Invalid Signature attribute length %u in class file %s", | |
1627 method_attribute_length, CHECK_(nullHandle)); | |
1628 } | |
1629 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
1630 generic_signature_index = cfs->get_u2_fast(); | |
1631 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
1632 runtime_visible_annotations_length = method_attribute_length; | |
1633 runtime_visible_annotations = cfs->get_u1_buffer(); | |
1634 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
1635 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
1636 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
1637 runtime_invisible_annotations_length = method_attribute_length; | |
1638 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
1639 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
1640 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
1641 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
1642 runtime_visible_parameter_annotations_length = method_attribute_length; | |
1643 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
1644 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
1645 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
1646 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
1647 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
1648 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
1649 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
1650 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
1651 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
1652 annotation_default_length = method_attribute_length; | |
1653 annotation_default = cfs->get_u1_buffer(); | |
1654 assert(annotation_default != NULL, "null annotation default"); | |
1655 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
1656 } else { | |
1657 // Skip unknown attributes | |
1658 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1659 } | |
1660 } else { | |
1661 // Skip unknown attributes | |
1662 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1663 } | |
1664 } | |
1665 | |
1666 if (linenumber_table != NULL) { | |
1667 linenumber_table->write_terminator(); | |
1668 linenumber_table_length = linenumber_table->position(); | |
1669 } | |
1670 | |
1671 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
1672 if (_need_verify) { | |
1673 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
1674 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
1675 } | |
1676 | |
1677 // All sizing information for a methodOop is finally available, now create it | |
1678 methodOop m_oop = oopFactory::new_method( | |
1679 code_length, access_flags, linenumber_table_length, | |
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1680 total_lvt_length, checked_exceptions_length, |
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1681 methodOopDesc::IsSafeConc, CHECK_(nullHandle)); |
0 | 1682 methodHandle m (THREAD, m_oop); |
1683 | |
1684 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
1685 | |
1686 // Fill in information from fixed part (access_flags already set) | |
1687 m->set_constants(cp()); | |
1688 m->set_name_index(name_index); | |
1689 m->set_signature_index(signature_index); | |
1690 m->set_generic_signature_index(generic_signature_index); | |
1691 #ifdef CC_INTERP | |
1692 // hmm is there a gc issue here?? | |
1693 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
1694 m->set_result_index(rtf.type()); | |
1695 #endif | |
1696 | |
1697 if (args_size >= 0) { | |
1698 m->set_size_of_parameters(args_size); | |
1699 } else { | |
1700 m->compute_size_of_parameters(THREAD); | |
1701 } | |
1702 #ifdef ASSERT | |
1703 if (args_size >= 0) { | |
1704 m->compute_size_of_parameters(THREAD); | |
1705 assert(args_size == m->size_of_parameters(), ""); | |
1706 } | |
1707 #endif | |
1708 | |
1709 // Fill in code attribute information | |
1710 m->set_max_stack(max_stack); | |
1711 m->set_max_locals(max_locals); | |
1712 m->constMethod()->set_stackmap_data(stackmap_data()); | |
1713 | |
1714 /** | |
1715 * The exception_table field is the flag used to indicate | |
1716 * that the methodOop and it's associated constMethodOop are partially | |
1717 * initialized and thus are exempt from pre/post GC verification. Once | |
1718 * the field is set, the oops are considered fully initialized so make | |
1719 * sure that the oops can pass verification when this field is set. | |
1720 */ | |
1721 m->set_exception_table(exception_handlers()); | |
1722 | |
1723 // Copy byte codes | |
1724 if (code_length > 0) { | |
1725 memcpy(m->code_base(), code_start, code_length); | |
1726 } | |
1727 | |
1728 // Copy line number table | |
1729 if (linenumber_table != NULL) { | |
1730 memcpy(m->compressed_linenumber_table(), | |
1731 linenumber_table->buffer(), linenumber_table_length); | |
1732 } | |
1733 | |
1734 // Copy checked exceptions | |
1735 if (checked_exceptions_length > 0) { | |
1736 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1737 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
1738 } | |
1739 | |
1740 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
1741 * | |
1742 * Rules for LVT's and LVTT's are: | |
1743 * - There can be any number of LVT's and LVTT's. | |
1744 * - If there are n LVT's, it is the same as if there was just | |
1745 * one LVT containing all the entries from the n LVT's. | |
1746 * - There may be no more than one LVT entry per local variable. | |
1747 * Two LVT entries are 'equal' if these fields are the same: | |
1748 * start_pc, length, name, slot | |
1749 * - There may be no more than one LVTT entry per each LVT entry. | |
1750 * Each LVTT entry has to match some LVT entry. | |
1751 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
1752 */ | |
1753 if (total_lvt_length > 0) { | |
1754 int tbl_no, idx; | |
1755 | |
1756 promoted_flags->set_has_localvariable_table(); | |
1757 | |
1758 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
1759 initialize_hashtable(lvt_Hash); | |
1760 | |
1761 // To fill LocalVariableTable in | |
1762 Classfile_LVT_Element* cf_lvt; | |
1763 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
1764 | |
1765 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
1766 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
1767 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
1768 copy_lvt_element(&cf_lvt[idx], lvt); | |
1769 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
1770 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
1771 && _need_verify | |
1772 && _major_version >= JAVA_1_5_VERSION ) { | |
1773 clear_hashtable(lvt_Hash); | |
1774 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
1775 "entry for '%s' in class file %s", | |
1776 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
1777 CHECK_(nullHandle)); | |
1778 } | |
1779 } | |
1780 } | |
1781 | |
1782 // To merge LocalVariableTable and LocalVariableTypeTable | |
1783 Classfile_LVT_Element* cf_lvtt; | |
1784 LocalVariableTableElement lvtt_elem; | |
1785 | |
1786 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
1787 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
1788 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
1789 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
1790 int index = hash(&lvtt_elem); | |
1791 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
1792 if (entry == NULL) { | |
1793 if (_need_verify) { | |
1794 clear_hashtable(lvt_Hash); | |
1795 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
1796 "does not match any LVT entry", | |
1797 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1798 CHECK_(nullHandle)); | |
1799 } | |
1800 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
1801 clear_hashtable(lvt_Hash); | |
1802 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
1803 "entry for '%s' in class file %s", | |
1804 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1805 CHECK_(nullHandle)); | |
1806 } else { | |
1807 // to add generic signatures into LocalVariableTable | |
1808 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
1809 } | |
1810 } | |
1811 } | |
1812 clear_hashtable(lvt_Hash); | |
1813 } | |
1814 | |
1815 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
1816 runtime_visible_annotations_length, | |
1817 runtime_invisible_annotations, | |
1818 runtime_invisible_annotations_length, | |
1819 CHECK_(nullHandle)); | |
1820 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
1821 runtime_visible_parameter_annotations_length, | |
1822 runtime_invisible_parameter_annotations, | |
1823 runtime_invisible_parameter_annotations_length, | |
1824 CHECK_(nullHandle)); | |
1825 *method_default_annotations = assemble_annotations(annotation_default, | |
1826 annotation_default_length, | |
1827 NULL, | |
1828 0, | |
1829 CHECK_(nullHandle)); | |
1830 | |
1831 if (name() == vmSymbols::finalize_method_name() && | |
1832 signature() == vmSymbols::void_method_signature()) { | |
1833 if (m->is_empty_method()) { | |
1834 _has_empty_finalizer = true; | |
1835 } else { | |
1836 _has_finalizer = true; | |
1837 } | |
1838 } | |
1839 if (name() == vmSymbols::object_initializer_name() && | |
1840 signature() == vmSymbols::void_method_signature() && | |
1841 m->is_vanilla_constructor()) { | |
1842 _has_vanilla_constructor = true; | |
1843 } | |
1844 | |
710 | 1845 if (EnableMethodHandles && m->is_method_handle_invoke()) { |
1846 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), | |
1847 "Method handle invokers must be defined internally to the VM", nullHandle); | |
1848 } | |
1849 | |
0 | 1850 return m; |
1851 } | |
1852 | |
1853 | |
1854 // The promoted_flags parameter is used to pass relevant access_flags | |
1855 // from the methods back up to the containing klass. These flag values | |
1856 // are added to klass's access_flags. | |
1857 | |
1858 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
1859 AccessFlags* promoted_flags, | |
1860 bool* has_final_method, | |
1861 objArrayOop* methods_annotations_oop, | |
1862 objArrayOop* methods_parameter_annotations_oop, | |
1863 objArrayOop* methods_default_annotations_oop, | |
1864 TRAPS) { | |
1865 ClassFileStream* cfs = stream(); | |
1866 objArrayHandle nullHandle; | |
1867 typeArrayHandle method_annotations; | |
1868 typeArrayHandle method_parameter_annotations; | |
1869 typeArrayHandle method_default_annotations; | |
1870 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
1871 u2 length = cfs->get_u2_fast(); | |
1872 if (length == 0) { | |
1873 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
1874 } else { | |
1875 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1876 objArrayHandle methods(THREAD, m); | |
1877 HandleMark hm(THREAD); | |
1878 objArrayHandle methods_annotations; | |
1879 objArrayHandle methods_parameter_annotations; | |
1880 objArrayHandle methods_default_annotations; | |
1881 for (int index = 0; index < length; index++) { | |
1882 methodHandle method = parse_method(cp, is_interface, | |
1883 promoted_flags, | |
1884 &method_annotations, | |
1885 &method_parameter_annotations, | |
1886 &method_default_annotations, | |
1887 CHECK_(nullHandle)); | |
1888 if (method->is_final()) { | |
1889 *has_final_method = true; | |
1890 } | |
1891 methods->obj_at_put(index, method()); | |
1892 if (method_annotations.not_null()) { | |
1893 if (methods_annotations.is_null()) { | |
1894 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1895 methods_annotations = objArrayHandle(THREAD, md); | |
1896 } | |
1897 methods_annotations->obj_at_put(index, method_annotations()); | |
1898 } | |
1899 if (method_parameter_annotations.not_null()) { | |
1900 if (methods_parameter_annotations.is_null()) { | |
1901 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1902 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
1903 } | |
1904 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
1905 } | |
1906 if (method_default_annotations.not_null()) { | |
1907 if (methods_default_annotations.is_null()) { | |
1908 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1909 methods_default_annotations = objArrayHandle(THREAD, md); | |
1910 } | |
1911 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
1912 } | |
1913 } | |
1914 if (_need_verify && length > 1) { | |
1915 // Check duplicated methods | |
1916 ResourceMark rm(THREAD); | |
1917 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1918 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
1919 initialize_hashtable(names_and_sigs); | |
1920 bool dup = false; | |
1921 { | |
1922 debug_only(No_Safepoint_Verifier nsv;) | |
1923 for (int i = 0; i < length; i++) { | |
1924 methodOop m = (methodOop)methods->obj_at(i); | |
1925 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
1926 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
1927 dup = true; | |
1928 break; | |
1929 } | |
1930 } | |
1931 } | |
1932 if (dup) { | |
1933 classfile_parse_error("Duplicate method name&signature in class file %s", | |
1934 CHECK_(nullHandle)); | |
1935 } | |
1936 } | |
1937 | |
1938 *methods_annotations_oop = methods_annotations(); | |
1939 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
1940 *methods_default_annotations_oop = methods_default_annotations(); | |
1941 | |
1942 return methods; | |
1943 } | |
1944 } | |
1945 | |
1946 | |
1947 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
1948 objArrayHandle methods_annotations, | |
1949 objArrayHandle methods_parameter_annotations, | |
1950 objArrayHandle methods_default_annotations, | |
1951 TRAPS) { | |
1952 typeArrayHandle nullHandle; | |
1953 int length = methods()->length(); | |
1954 // If JVMTI original method ordering is enabled we have to | |
1955 // remember the original class file ordering. | |
1956 // We temporarily use the vtable_index field in the methodOop to store the | |
1957 // class file index, so we can read in after calling qsort. | |
1958 if (JvmtiExport::can_maintain_original_method_order()) { | |
1959 for (int index = 0; index < length; index++) { | |
1960 methodOop m = methodOop(methods->obj_at(index)); | |
1961 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
1962 m->set_vtable_index(index); | |
1963 } | |
1964 } | |
1965 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
1966 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
1967 methodOopDesc::sort_methods(methods(), | |
1968 methods_annotations(), | |
1969 methods_parameter_annotations(), | |
1970 methods_default_annotations()); | |
1971 | |
1972 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
1973 if (JvmtiExport::can_maintain_original_method_order()) { | |
1974 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
1975 typeArrayHandle method_ordering(THREAD, new_ordering); | |
1976 for (int index = 0; index < length; index++) { | |
1977 methodOop m = methodOop(methods->obj_at(index)); | |
1978 int old_index = m->vtable_index(); | |
1979 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
1980 method_ordering->int_at_put(index, old_index); | |
1981 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
1982 } | |
1983 return method_ordering; | |
1984 } else { | |
1985 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
1986 } | |
1987 } | |
1988 | |
1989 | |
1990 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1991 ClassFileStream* cfs = stream(); | |
1992 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
1993 u2 sourcefile_index = cfs->get_u2_fast(); | |
1994 check_property( | |
1995 valid_cp_range(sourcefile_index, cp->length()) && | |
1996 cp->tag_at(sourcefile_index).is_utf8(), | |
1997 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
1998 sourcefile_index, CHECK); | |
1999 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
2000 } | |
2001 | |
2002 | |
2003 | |
2004 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
2005 instanceKlassHandle k, | |
2006 int length, TRAPS) { | |
2007 ClassFileStream* cfs = stream(); | |
2008 u1* sde_buffer = cfs->get_u1_buffer(); | |
2009 assert(sde_buffer != NULL, "null sde buffer"); | |
2010 | |
2011 // Don't bother storing it if there is no way to retrieve it | |
2012 if (JvmtiExport::can_get_source_debug_extension()) { | |
2013 // Optimistically assume that only 1 byte UTF format is used | |
2014 // (common case) | |
2015 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
2016 length, CHECK); | |
2017 k->set_source_debug_extension(sde_symbol); | |
2018 } | |
2019 // Got utf8 string, set stream position forward | |
2020 cfs->skip_u1(length, CHECK); | |
2021 } | |
2022 | |
2023 | |
2024 // Inner classes can be static, private or protected (classic VM does this) | |
2025 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
2026 | |
2027 // Return number of classes in the inner classes attribute table | |
2028 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2029 ClassFileStream* cfs = stream(); | |
2030 cfs->guarantee_more(2, CHECK_0); // length | |
2031 u2 length = cfs->get_u2_fast(); | |
2032 | |
2033 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
2034 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
2035 typeArrayHandle inner_classes(THREAD, ic); | |
2036 int index = 0; | |
2037 int cp_size = cp->length(); | |
2038 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
2039 for (int n = 0; n < length; n++) { | |
2040 // Inner class index | |
2041 u2 inner_class_info_index = cfs->get_u2_fast(); | |
2042 check_property( | |
2043 inner_class_info_index == 0 || | |
2044 (valid_cp_range(inner_class_info_index, cp_size) && | |
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2045 is_klass_reference(cp, inner_class_info_index)), |
0 | 2046 "inner_class_info_index %u has bad constant type in class file %s", |
2047 inner_class_info_index, CHECK_0); | |
2048 // Outer class index | |
2049 u2 outer_class_info_index = cfs->get_u2_fast(); | |
2050 check_property( | |
2051 outer_class_info_index == 0 || | |
2052 (valid_cp_range(outer_class_info_index, cp_size) && | |
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2053 is_klass_reference(cp, outer_class_info_index)), |
0 | 2054 "outer_class_info_index %u has bad constant type in class file %s", |
2055 outer_class_info_index, CHECK_0); | |
2056 // Inner class name | |
2057 u2 inner_name_index = cfs->get_u2_fast(); | |
2058 check_property( | |
2059 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
2060 cp->tag_at(inner_name_index).is_utf8()), | |
2061 "inner_name_index %u has bad constant type in class file %s", | |
2062 inner_name_index, CHECK_0); | |
2063 if (_need_verify) { | |
2064 guarantee_property(inner_class_info_index != outer_class_info_index, | |
2065 "Class is both outer and inner class in class file %s", CHECK_0); | |
2066 } | |
2067 // Access flags | |
2068 AccessFlags inner_access_flags; | |
2069 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
2070 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2071 // Set abstract bit for old class files for backward compatibility | |
2072 flags |= JVM_ACC_ABSTRACT; | |
2073 } | |
2074 verify_legal_class_modifiers(flags, CHECK_0); | |
2075 inner_access_flags.set_flags(flags); | |
2076 | |
2077 inner_classes->short_at_put(index++, inner_class_info_index); | |
2078 inner_classes->short_at_put(index++, outer_class_info_index); | |
2079 inner_classes->short_at_put(index++, inner_name_index); | |
2080 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
2081 } | |
2082 | |
2083 // 4347400: make sure there's no duplicate entry in the classes array | |
2084 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2085 for(int i = 0; i < inner_classes->length(); i += 4) { | |
2086 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
2087 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
2088 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
2089 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
2090 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
2091 "Duplicate entry in InnerClasses in class file %s", | |
2092 CHECK_0); | |
2093 } | |
2094 } | |
2095 } | |
2096 | |
2097 // Update instanceKlass with inner class info. | |
2098 k->set_inner_classes(inner_classes()); | |
2099 return length; | |
2100 } | |
2101 | |
2102 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2103 k->set_is_synthetic(); | |
2104 } | |
2105 | |
2106 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2107 ClassFileStream* cfs = stream(); | |
2108 u2 signature_index = cfs->get_u2(CHECK); | |
2109 check_property( | |
2110 valid_cp_range(signature_index, cp->length()) && | |
2111 cp->tag_at(signature_index).is_utf8(), | |
2112 "Invalid constant pool index %u in Signature attribute in class file %s", | |
2113 signature_index, CHECK); | |
2114 k->set_generic_signature(cp->symbol_at(signature_index)); | |
2115 } | |
2116 | |
2117 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2118 ClassFileStream* cfs = stream(); | |
2119 // Set inner classes attribute to default sentinel | |
2120 k->set_inner_classes(Universe::the_empty_short_array()); | |
2121 cfs->guarantee_more(2, CHECK); // attributes_count | |
2122 u2 attributes_count = cfs->get_u2_fast(); | |
2123 bool parsed_sourcefile_attribute = false; | |
2124 bool parsed_innerclasses_attribute = false; | |
2125 bool parsed_enclosingmethod_attribute = false; | |
2126 u1* runtime_visible_annotations = NULL; | |
2127 int runtime_visible_annotations_length = 0; | |
2128 u1* runtime_invisible_annotations = NULL; | |
2129 int runtime_invisible_annotations_length = 0; | |
2130 // Iterate over attributes | |
2131 while (attributes_count--) { | |
2132 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
2133 u2 attribute_name_index = cfs->get_u2_fast(); | |
2134 u4 attribute_length = cfs->get_u4_fast(); | |
2135 check_property( | |
2136 valid_cp_range(attribute_name_index, cp->length()) && | |
2137 cp->tag_at(attribute_name_index).is_utf8(), | |
2138 "Attribute name has bad constant pool index %u in class file %s", | |
2139 attribute_name_index, CHECK); | |
2140 symbolOop tag = cp->symbol_at(attribute_name_index); | |
2141 if (tag == vmSymbols::tag_source_file()) { | |
2142 // Check for SourceFile tag | |
2143 if (_need_verify) { | |
2144 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
2145 } | |
2146 if (parsed_sourcefile_attribute) { | |
2147 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
2148 } else { | |
2149 parsed_sourcefile_attribute = true; | |
2150 } | |
2151 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
2152 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
2153 // Check for SourceDebugExtension tag | |
2154 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
2155 } else if (tag == vmSymbols::tag_inner_classes()) { | |
2156 // Check for InnerClasses tag | |
2157 if (parsed_innerclasses_attribute) { | |
2158 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
2159 } else { | |
2160 parsed_innerclasses_attribute = true; | |
2161 } | |
2162 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
2163 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2164 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
2165 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
2166 } | |
2167 } else if (tag == vmSymbols::tag_synthetic()) { | |
2168 // Check for Synthetic tag | |
2169 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
2170 if (attribute_length != 0) { | |
2171 classfile_parse_error( | |
2172 "Invalid Synthetic classfile attribute length %u in class file %s", | |
2173 attribute_length, CHECK); | |
2174 } | |
2175 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
2176 } else if (tag == vmSymbols::tag_deprecated()) { | |
2177 // Check for Deprecatd tag - 4276120 | |
2178 if (attribute_length != 0) { | |
2179 classfile_parse_error( | |
2180 "Invalid Deprecated classfile attribute length %u in class file %s", | |
2181 attribute_length, CHECK); | |
2182 } | |
2183 } else if (_major_version >= JAVA_1_5_VERSION) { | |
2184 if (tag == vmSymbols::tag_signature()) { | |
2185 if (attribute_length != 2) { | |
2186 classfile_parse_error( | |
2187 "Wrong Signature attribute length %u in class file %s", | |
2188 attribute_length, CHECK); | |
2189 } | |
2190 parse_classfile_signature_attribute(cp, k, CHECK); | |
2191 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
2192 runtime_visible_annotations_length = attribute_length; | |
2193 runtime_visible_annotations = cfs->get_u1_buffer(); | |
2194 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
2195 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
2196 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
2197 runtime_invisible_annotations_length = attribute_length; | |
2198 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
2199 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
2200 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
2201 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
2202 if (parsed_enclosingmethod_attribute) { | |
2203 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
2204 } else { | |
2205 parsed_enclosingmethod_attribute = true; | |
2206 } | |
2207 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
2208 u2 class_index = cfs->get_u2_fast(); | |
2209 u2 method_index = cfs->get_u2_fast(); | |
2210 if (class_index == 0) { | |
2211 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
2212 } | |
2213 // Validate the constant pool indices and types | |
2214 if (!cp->is_within_bounds(class_index) || | |
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2215 !is_klass_reference(cp, class_index)) { |
0 | 2216 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
2217 } | |
2218 if (method_index != 0 && | |
2219 (!cp->is_within_bounds(method_index) || | |
2220 !cp->tag_at(method_index).is_name_and_type())) { | |
2221 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
2222 } | |
2223 k->set_enclosing_method_indices(class_index, method_index); | |
2224 } else { | |
2225 // Unknown attribute | |
2226 cfs->skip_u1(attribute_length, CHECK); | |
2227 } | |
2228 } else { | |
2229 // Unknown attribute | |
2230 cfs->skip_u1(attribute_length, CHECK); | |
2231 } | |
2232 } | |
2233 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
2234 runtime_visible_annotations_length, | |
2235 runtime_invisible_annotations, | |
2236 runtime_invisible_annotations_length, | |
2237 CHECK); | |
2238 k->set_class_annotations(annotations()); | |
2239 } | |
2240 | |
2241 | |
2242 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
2243 int runtime_visible_annotations_length, | |
2244 u1* runtime_invisible_annotations, | |
2245 int runtime_invisible_annotations_length, TRAPS) { | |
2246 typeArrayHandle annotations; | |
2247 if (runtime_visible_annotations != NULL || | |
2248 runtime_invisible_annotations != NULL) { | |
2249 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
2250 runtime_invisible_annotations_length, CHECK_(annotations)); | |
2251 annotations = typeArrayHandle(THREAD, anno); | |
2252 if (runtime_visible_annotations != NULL) { | |
2253 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
2254 } | |
2255 if (runtime_invisible_annotations != NULL) { | |
2256 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
2257 } | |
2258 } | |
2259 return annotations; | |
2260 } | |
2261 | |
2262 | |
2263 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
2264 KlassHandle h_k (THREAD, fd->field_holder()); | |
2265 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
2266 if (fd->has_initial_value()) { | |
2267 BasicType t = fd->field_type(); | |
2268 switch (t) { | |
2269 case T_BYTE: | |
2270 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
2271 break; | |
2272 case T_BOOLEAN: | |
2273 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
2274 break; | |
2275 case T_CHAR: | |
2276 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
2277 break; | |
2278 case T_SHORT: | |
2279 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
2280 break; | |
2281 case T_INT: | |
2282 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
2283 break; | |
2284 case T_FLOAT: | |
2285 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
2286 break; | |
2287 case T_DOUBLE: | |
2288 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
2289 break; | |
2290 case T_LONG: | |
2291 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
2292 break; | |
2293 case T_OBJECT: | |
2294 { | |
2295 #ifdef ASSERT | |
2296 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
2297 assert(fd->signature() == sym, "just checking"); | |
2298 #endif | |
2299 oop string = fd->string_initial_value(CHECK); | |
2300 h_k()->obj_field_put(fd->offset(), string); | |
2301 } | |
2302 break; | |
2303 default: | |
2304 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
2305 "Illegal ConstantValue attribute in class file"); | |
2306 } | |
2307 } | |
2308 } | |
2309 | |
2310 | |
2311 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
2312 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
2313 // This code is for compatibility with earlier jdk's that do not | |
2314 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
2315 // the check for the "discovered" field should issue a warning if | |
2316 // the field is not found. For 1.6 this code should be issue a | |
2317 // fatal error if the "discovered" field is not found. | |
2318 // | |
2319 // Increment fac.nonstatic_oop_count so that the start of the | |
2320 // next type of non-static oops leaves room for the fake oop. | |
2321 // Do not increment next_nonstatic_oop_offset so that the | |
2322 // fake oop is place after the java.lang.ref.Reference oop | |
2323 // fields. | |
2324 // | |
2325 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2326 // field. If it is not present, artifically create a field for it. | |
2327 // This allows this VM to run on early JDK where the field is not | |
2328 // present. | |
2329 | |
2330 // | |
2331 // Increment fac.nonstatic_oop_count so that the start of the | |
2332 // next type of non-static oops leaves room for the fake oop. | |
2333 // Do not increment next_nonstatic_oop_offset so that the | |
2334 // fake oop is place after the java.lang.ref.Reference oop | |
2335 // fields. | |
2336 // | |
2337 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2338 // field. If it is not present, artifically create a field for it. | |
2339 // This allows this VM to run on early JDK where the field is not | |
2340 // present. | |
2341 int reference_sig_index = 0; | |
2342 int reference_name_index = 0; | |
2343 int reference_index = 0; | |
2344 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
2345 const int n = (*fields_ptr)()->length(); | |
2346 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
2347 int name_index = | |
2348 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
2349 int sig_index = | |
2350 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
2351 symbolOop f_name = cp->symbol_at(name_index); | |
2352 symbolOop f_sig = cp->symbol_at(sig_index); | |
2353 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
2354 // Save the index for reference signature for later use. | |
2355 // The fake discovered field does not entries in the | |
2356 // constant pool so the index for its signature cannot | |
2357 // be extracted from the constant pool. It will need | |
2358 // later, however. It's signature is vmSymbols::reference_signature() | |
2359 // so same an index for that signature. | |
2360 reference_sig_index = sig_index; | |
2361 reference_name_index = name_index; | |
2362 reference_index = i; | |
2363 } | |
2364 if (f_name == vmSymbols::reference_discovered_name() && | |
2365 f_sig == vmSymbols::reference_signature()) { | |
2366 // The values below are fake but will force extra | |
2367 // non-static oop fields and a corresponding non-static | |
2368 // oop map block to be allocated. | |
2369 extra = 0; | |
2370 break; | |
2371 } | |
2372 } | |
2373 if (extra != 0) { | |
2374 fac_ptr->nonstatic_oop_count += extra; | |
2375 // Add the additional entry to "fields" so that the klass | |
2376 // contains the "discoverd" field and the field will be initialized | |
2377 // in instances of the object. | |
2378 int fields_with_fix_length = (*fields_ptr)()->length() + | |
2379 instanceKlass::next_offset; | |
2380 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
2381 fields_with_fix_length, CHECK); | |
2382 typeArrayHandle fields_with_fix(THREAD, ff); | |
2383 | |
2384 // Take everything from the original but the length. | |
2385 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
2386 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
2387 } | |
2388 | |
2389 // Add the fake field at the end. | |
2390 int i = (*fields_ptr)->length(); | |
2391 // There is no name index for the fake "discovered" field nor | |
2392 // signature but a signature is needed so that the field will | |
2393 // be properly initialized. Use one found for | |
2394 // one of the other reference fields. Be sure the index for the | |
2395 // name is 0. In fieldDescriptor::initialize() the index of the | |
2396 // name is checked. That check is by passed for the last nonstatic | |
2397 // oop field in a java.lang.ref.Reference which is assumed to be | |
2398 // this artificial "discovered" field. An assertion checks that | |
2399 // the name index is 0. | |
2400 assert(reference_index != 0, "Missing signature for reference"); | |
2401 | |
2402 int j; | |
2403 for (j = 0; j < instanceKlass::next_offset; j++) { | |
2404 fields_with_fix->ushort_at_put(i + j, | |
2405 (*fields_ptr)->ushort_at(reference_index +j)); | |
2406 } | |
2407 // Clear the public access flag and set the private access flag. | |
2408 short flags; | |
2409 flags = | |
2410 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
2411 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
2412 flags = flags & (~JVM_ACC_PUBLIC); | |
2413 flags = flags | JVM_ACC_PRIVATE; | |
2414 AccessFlags access_flags; | |
2415 access_flags.set_flags(flags); | |
2416 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
2417 assert(access_flags.is_private(), "Failed to set private flag"); | |
2418 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
2419 flags); | |
2420 | |
2421 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
2422 == reference_name_index, "The fake reference name is incorrect"); | |
2423 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
2424 == reference_sig_index, "The fake reference signature is incorrect"); | |
2425 // The type of the field is stored in the low_offset entry during | |
2426 // parsing. | |
2427 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
2428 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
2429 | |
2430 // "fields" is allocated in the permanent generation. Disgard | |
2431 // it and let it be collected. | |
2432 (*fields_ptr) = fields_with_fix; | |
2433 } | |
2434 return; | |
2435 } | |
2436 | |
2437 | |
2438 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
2439 FieldAllocationCount *fac_ptr, TRAPS) { | |
2440 // Add fake fields for java.lang.Class instances | |
2441 // | |
2442 // This is not particularly nice. We should consider adding a | |
2443 // private transient object field at the Java level to | |
2444 // java.lang.Class. Alternatively we could add a subclass of | |
2445 // instanceKlass which provides an accessor and size computer for | |
2446 // this field, but that appears to be more code than this hack. | |
2447 // | |
2448 // NOTE that we wedge these in at the beginning rather than the | |
2449 // end of the object because the Class layout changed between JDK | |
2450 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
2451 // nonstatic oop fields were added at the Java level. The offsets | |
2452 // of these fake fields can't change between these two JDK | |
2453 // versions because when the offsets are computed at bootstrap | |
2454 // time we don't know yet which version of the JDK we're running in. | |
2455 | |
2456 // The values below are fake but will force two non-static oop fields and | |
2457 // a corresponding non-static oop map block to be allocated. | |
2458 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
2459 fac_ptr->nonstatic_oop_count += extra; | |
2460 } | |
2461 | |
2462 | |
2463 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
2464 // Cause the extra fake fields in java.lang.Class to show up before | |
2465 // the Java fields for layout compatibility between 1.3 and 1.4 | |
2466 // Incrementing next_nonstatic_oop_offset here advances the | |
2467 // location where the real java fields are placed. | |
2468 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
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2469 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
0 | 2470 } |
2471 | |
2472 | |
710 | 2473 // Force MethodHandle.vmentry to be an unmanaged pointer. |
2474 // There is no way for a classfile to express this, so we must help it. | |
2475 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
2476 typeArrayHandle* fields_ptr, | |
2477 FieldAllocationCount *fac_ptr, | |
2478 TRAPS) { | |
2479 // Add fake fields for java.dyn.MethodHandle instances | |
2480 // | |
2481 // This is not particularly nice, but since there is no way to express | |
2482 // a native wordSize field in Java, we must do it at this level. | |
2483 | |
2484 if (!EnableMethodHandles) return; | |
2485 | |
2486 int word_sig_index = 0; | |
2487 const int cp_size = cp->length(); | |
2488 for (int index = 1; index < cp_size; index++) { | |
2489 if (cp->tag_at(index).is_utf8() && | |
2490 cp->symbol_at(index) == vmSymbols::machine_word_signature()) { | |
2491 word_sig_index = index; | |
2492 break; | |
2493 } | |
2494 } | |
2495 | |
2496 if (word_sig_index == 0) | |
2497 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
2498 "missing I or J signature (for vmentry) in java.dyn.MethodHandle"); | |
2499 | |
2500 bool found_vmentry = false; | |
2501 | |
2502 const int n = (*fields_ptr)()->length(); | |
2503 for (int i = 0; i < n; i += instanceKlass::next_offset) { | |
2504 int name_index = (*fields_ptr)->ushort_at(i + instanceKlass::name_index_offset); | |
2505 int sig_index = (*fields_ptr)->ushort_at(i + instanceKlass::signature_index_offset); | |
2506 int acc_flags = (*fields_ptr)->ushort_at(i + instanceKlass::access_flags_offset); | |
2507 symbolOop f_name = cp->symbol_at(name_index); | |
2508 symbolOop f_sig = cp->symbol_at(sig_index); | |
2509 if (f_sig == vmSymbols::byte_signature() && | |
2510 f_name == vmSymbols::vmentry_name() && | |
2511 (acc_flags & JVM_ACC_STATIC) == 0) { | |
2512 // Adjust the field type from byte to an unmanaged pointer. | |
2513 assert(fac_ptr->nonstatic_byte_count > 0, ""); | |
2514 fac_ptr->nonstatic_byte_count -= 1; | |
2515 (*fields_ptr)->ushort_at_put(i + instanceKlass::signature_index_offset, | |
2516 word_sig_index); | |
2517 if (wordSize == jintSize) { | |
2518 fac_ptr->nonstatic_word_count += 1; | |
2519 } else { | |
2520 fac_ptr->nonstatic_double_count += 1; | |
2521 } | |
2522 | |
2523 FieldAllocationType atype = (FieldAllocationType) (*fields_ptr)->ushort_at(i+4); | |
2524 assert(atype == NONSTATIC_BYTE, ""); | |
2525 FieldAllocationType new_atype = NONSTATIC_WORD; | |
2526 if (wordSize > jintSize) { | |
2527 if (Universe::field_type_should_be_aligned(T_LONG)) { | |
2528 atype = NONSTATIC_ALIGNED_DOUBLE; | |
2529 } else { | |
2530 atype = NONSTATIC_DOUBLE; | |
2531 } | |
2532 } | |
2533 (*fields_ptr)->ushort_at_put(i+4, new_atype); | |
2534 | |
2535 found_vmentry = true; | |
2536 break; | |
2537 } | |
2538 } | |
2539 | |
2540 if (!found_vmentry) | |
2541 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
2542 "missing vmentry byte field in java.dyn.MethodHandle"); | |
2543 | |
2544 } | |
2545 | |
2546 | |
0 | 2547 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, |
2548 Handle class_loader, | |
2549 Handle protection_domain, | |
710 | 2550 KlassHandle host_klass, |
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2551 GrowableArray<Handle>* cp_patches, |
0 | 2552 symbolHandle& parsed_name, |
2553 TRAPS) { | |
2554 // So that JVMTI can cache class file in the state before retransformable agents | |
2555 // have modified it | |
2556 unsigned char *cached_class_file_bytes = NULL; | |
2557 jint cached_class_file_length; | |
2558 | |
2559 ClassFileStream* cfs = stream(); | |
2560 // Timing | |
2561 PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time()); | |
2562 | |
2563 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
2564 | |
2565 if (JvmtiExport::should_post_class_file_load_hook()) { | |
2566 unsigned char* ptr = cfs->buffer(); | |
2567 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
2568 | |
2569 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
2570 &ptr, &end_ptr, | |
2571 &cached_class_file_bytes, | |
2572 &cached_class_file_length); | |
2573 | |
2574 if (ptr != cfs->buffer()) { | |
2575 // JVMTI agent has modified class file data. | |
2576 // Set new class file stream using JVMTI agent modified | |
2577 // class file data. | |
2578 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
2579 set_stream(cfs); | |
2580 } | |
2581 } | |
2582 | |
710 | 2583 _host_klass = host_klass; |
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2584 _cp_patches = cp_patches; |
0 | 2585 |
2586 instanceKlassHandle nullHandle; | |
2587 | |
2588 // Figure out whether we can skip format checking (matching classic VM behavior) | |
2589 _need_verify = Verifier::should_verify_for(class_loader()); | |
2590 | |
2591 // Set the verify flag in stream | |
2592 cfs->set_verify(_need_verify); | |
2593 | |
2594 // Save the class file name for easier error message printing. | |
2595 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
2596 | |
2597 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
2598 // Magic value | |
2599 u4 magic = cfs->get_u4_fast(); | |
2600 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
2601 "Incompatible magic value %u in class file %s", | |
2602 magic, CHECK_(nullHandle)); | |
2603 | |
2604 // Version numbers | |
2605 u2 minor_version = cfs->get_u2_fast(); | |
2606 u2 major_version = cfs->get_u2_fast(); | |
2607 | |
2608 // Check version numbers - we check this even with verifier off | |
2609 if (!is_supported_version(major_version, minor_version)) { | |
2610 if (name.is_null()) { | |
2611 Exceptions::fthrow( | |
2612 THREAD_AND_LOCATION, | |
2613 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2614 "Unsupported major.minor version %u.%u", | |
2615 major_version, | |
2616 minor_version); | |
2617 } else { | |
2618 ResourceMark rm(THREAD); | |
2619 Exceptions::fthrow( | |
2620 THREAD_AND_LOCATION, | |
2621 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2622 "%s : Unsupported major.minor version %u.%u", | |
2623 name->as_C_string(), | |
2624 major_version, | |
2625 minor_version); | |
2626 } | |
2627 return nullHandle; | |
2628 } | |
2629 | |
2630 _major_version = major_version; | |
2631 _minor_version = minor_version; | |
2632 | |
2633 | |
2634 // Check if verification needs to be relaxed for this class file | |
2635 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
2636 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
2637 | |
2638 // Constant pool | |
2639 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
2640 int cp_size = cp->length(); | |
2641 | |
2642 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
2643 | |
2644 // Access flags | |
2645 AccessFlags access_flags; | |
2646 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
2647 | |
2648 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2649 // Set abstract bit for old class files for backward compatibility | |
2650 flags |= JVM_ACC_ABSTRACT; | |
2651 } | |
2652 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
2653 access_flags.set_flags(flags); | |
2654 | |
2655 // This class and superclass | |
2656 instanceKlassHandle super_klass; | |
2657 u2 this_class_index = cfs->get_u2_fast(); | |
2658 check_property( | |
2659 valid_cp_range(this_class_index, cp_size) && | |
2660 cp->tag_at(this_class_index).is_unresolved_klass(), | |
2661 "Invalid this class index %u in constant pool in class file %s", | |
2662 this_class_index, CHECK_(nullHandle)); | |
2663 | |
2664 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
2665 assert(class_name.not_null(), "class_name can't be null"); | |
2666 | |
2667 // It's important to set parsed_name *before* resolving the super class. | |
2668 // (it's used for cleanup by the caller if parsing fails) | |
2669 parsed_name = class_name; | |
2670 | |
2671 // Update _class_name which could be null previously to be class_name | |
2672 _class_name = class_name; | |
2673 | |
2674 // Don't need to check whether this class name is legal or not. | |
2675 // It has been checked when constant pool is parsed. | |
2676 // However, make sure it is not an array type. | |
2677 if (_need_verify) { | |
2678 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
2679 "Bad class name in class file %s", | |
2680 CHECK_(nullHandle)); | |
2681 } | |
2682 | |
2683 klassOop preserve_this_klass; // for storing result across HandleMark | |
2684 | |
2685 // release all handles when parsing is done | |
2686 { HandleMark hm(THREAD); | |
2687 | |
2688 // Checks if name in class file matches requested name | |
2689 if (name.not_null() && class_name() != name()) { | |
2690 ResourceMark rm(THREAD); | |
2691 Exceptions::fthrow( | |
2692 THREAD_AND_LOCATION, | |
2693 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
2694 "%s (wrong name: %s)", | |
2695 name->as_C_string(), | |
2696 class_name->as_C_string() | |
2697 ); | |
2698 return nullHandle; | |
2699 } | |
2700 | |
2701 if (TraceClassLoadingPreorder) { | |
2702 tty->print("[Loading %s", name()->as_klass_external_name()); | |
2703 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
2704 tty->print_cr("]"); | |
2705 } | |
2706 | |
2707 u2 super_class_index = cfs->get_u2_fast(); | |
2708 if (super_class_index == 0) { | |
2709 check_property(class_name() == vmSymbols::java_lang_Object(), | |
2710 "Invalid superclass index %u in class file %s", | |
2711 super_class_index, | |
2712 CHECK_(nullHandle)); | |
2713 } else { | |
2714 check_property(valid_cp_range(super_class_index, cp_size) && | |
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2715 is_klass_reference(cp, super_class_index), |
0 | 2716 "Invalid superclass index %u in class file %s", |
2717 super_class_index, | |
2718 CHECK_(nullHandle)); | |
2719 // The class name should be legal because it is checked when parsing constant pool. | |
2720 // However, make sure it is not an array type. | |
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2721 bool is_array = false; |
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2722 if (cp->tag_at(super_class_index).is_klass()) { |
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2723 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
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2724 if (_need_verify) |
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2725 is_array = super_klass->oop_is_array(); |
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2726 } else if (_need_verify) { |
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2727 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
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2728 } |
0 | 2729 if (_need_verify) { |
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2730 guarantee_property(!is_array, |
0 | 2731 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
2732 } | |
2733 } | |
2734 | |
2735 // Interfaces | |
2736 u2 itfs_len = cfs->get_u2_fast(); | |
2737 objArrayHandle local_interfaces; | |
2738 if (itfs_len == 0) { | |
2739 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
2740 } else { | |
2741 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle)); | |
2742 } | |
2743 | |
2744 // Fields (offsets are filled in later) | |
2745 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
2746 objArrayHandle fields_annotations; | |
2747 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
2748 // Methods | |
2749 bool has_final_method = false; | |
2750 AccessFlags promoted_flags; | |
2751 promoted_flags.set_flags(0); | |
2752 // These need to be oop pointers because they are allocated lazily | |
2753 // inside parse_methods inside a nested HandleMark | |
2754 objArrayOop methods_annotations_oop = NULL; | |
2755 objArrayOop methods_parameter_annotations_oop = NULL; | |
2756 objArrayOop methods_default_annotations_oop = NULL; | |
2757 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
2758 &promoted_flags, | |
2759 &has_final_method, | |
2760 &methods_annotations_oop, | |
2761 &methods_parameter_annotations_oop, | |
2762 &methods_default_annotations_oop, | |
2763 CHECK_(nullHandle)); | |
2764 | |
2765 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
2766 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
2767 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
2768 | |
2769 // We check super class after class file is parsed and format is checked | |
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2770 if (super_class_index > 0 && super_klass.is_null()) { |
0 | 2771 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); |
2772 if (access_flags.is_interface()) { | |
2773 // Before attempting to resolve the superclass, check for class format | |
2774 // errors not checked yet. | |
2775 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
2776 "Interfaces must have java.lang.Object as superclass in class file %s", | |
2777 CHECK_(nullHandle)); | |
2778 } | |
2779 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
2780 sk, | |
2781 class_loader, | |
2782 protection_domain, | |
2783 true, | |
2784 CHECK_(nullHandle)); | |
2785 KlassHandle kh (THREAD, k); | |
2786 super_klass = instanceKlassHandle(THREAD, kh()); | |
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2787 if (LinkWellKnownClasses) // my super class is well known to me |
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2788 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
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2789 } |
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2790 if (super_klass.not_null()) { |
0 | 2791 if (super_klass->is_interface()) { |
2792 ResourceMark rm(THREAD); | |
2793 Exceptions::fthrow( | |
2794 THREAD_AND_LOCATION, | |
2795 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
2796 "class %s has interface %s as super class", | |
2797 class_name->as_klass_external_name(), | |
2798 super_klass->external_name() | |
2799 ); | |
2800 return nullHandle; | |
2801 } | |
2802 // Make sure super class is not final | |
2803 if (super_klass->is_final()) { | |
2804 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
2805 } | |
2806 } | |
2807 | |
2808 // Compute the transitive list of all unique interfaces implemented by this class | |
2809 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
2810 | |
2811 // sort methods | |
2812 typeArrayHandle method_ordering = sort_methods(methods, | |
2813 methods_annotations, | |
2814 methods_parameter_annotations, | |
2815 methods_default_annotations, | |
2816 CHECK_(nullHandle)); | |
2817 | |
2818 // promote flags from parse_methods() to the klass' flags | |
2819 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
2820 | |
2821 // Size of Java vtable (in words) | |
2822 int vtable_size = 0; | |
2823 int itable_size = 0; | |
2824 int num_miranda_methods = 0; | |
2825 | |
2826 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
2827 num_miranda_methods, | |
2828 super_klass(), | |
2829 methods(), | |
2830 access_flags, | |
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2831 class_loader, |
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2832 class_name, |
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2833 local_interfaces(), |
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2834 CHECK_(nullHandle)); |
0 | 2835 |
2836 // Size of Java itable (in words) | |
2837 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
2838 | |
2839 // Field size and offset computation | |
2840 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
2841 #ifndef PRODUCT | |
2842 int orig_nonstatic_field_size = 0; | |
2843 #endif | |
2844 int static_field_size = 0; | |
2845 int next_static_oop_offset; | |
2846 int next_static_double_offset; | |
2847 int next_static_word_offset; | |
2848 int next_static_short_offset; | |
2849 int next_static_byte_offset; | |
2850 int next_static_type_offset; | |
2851 int next_nonstatic_oop_offset; | |
2852 int next_nonstatic_double_offset; | |
2853 int next_nonstatic_word_offset; | |
2854 int next_nonstatic_short_offset; | |
2855 int next_nonstatic_byte_offset; | |
2856 int next_nonstatic_type_offset; | |
2857 int first_nonstatic_oop_offset; | |
2858 int first_nonstatic_field_offset; | |
2859 int next_nonstatic_field_offset; | |
2860 | |
2861 // Calculate the starting byte offsets | |
2862 next_static_oop_offset = (instanceKlass::header_size() + | |
2863 align_object_offset(vtable_size) + | |
2864 align_object_offset(itable_size)) * wordSize; | |
2865 next_static_double_offset = next_static_oop_offset + | |
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2866 (fac.static_oop_count * heapOopSize); |
0 | 2867 if ( fac.static_double_count && |
2868 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
2869 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
2870 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
2871 } | |
2872 | |
2873 next_static_word_offset = next_static_double_offset + | |
2874 (fac.static_double_count * BytesPerLong); | |
2875 next_static_short_offset = next_static_word_offset + | |
2876 (fac.static_word_count * BytesPerInt); | |
2877 next_static_byte_offset = next_static_short_offset + | |
2878 (fac.static_short_count * BytesPerShort); | |
2879 next_static_type_offset = align_size_up((next_static_byte_offset + | |
2880 fac.static_byte_count ), wordSize ); | |
2881 static_field_size = (next_static_type_offset - | |
2882 next_static_oop_offset) / wordSize; | |
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2883 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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2884 nonstatic_field_size * heapOopSize; |
0 | 2885 next_nonstatic_field_offset = first_nonstatic_field_offset; |
2886 | |
2887 // Add fake fields for java.lang.Class instances (also see below) | |
2888 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2889 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
2890 } | |
2891 | |
710 | 2892 // adjust the vmentry field declaration in java.dyn.MethodHandle |
2893 if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) { | |
2894 java_dyn_MethodHandle_fix_pre(cp, &fields, &fac, CHECK_(nullHandle)); | |
2895 } | |
2896 | |
0 | 2897 // Add a fake "discovered" field if it is not present |
2898 // for compatibility with earlier jdk's. | |
2899 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
2900 && class_loader.is_null()) { | |
2901 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
2902 } | |
2903 // end of "discovered" field compactibility fix | |
2904 | |
2905 int nonstatic_double_count = fac.nonstatic_double_count; | |
2906 int nonstatic_word_count = fac.nonstatic_word_count; | |
2907 int nonstatic_short_count = fac.nonstatic_short_count; | |
2908 int nonstatic_byte_count = fac.nonstatic_byte_count; | |
2909 int nonstatic_oop_count = fac.nonstatic_oop_count; | |
2910 | |
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2911 bool super_has_nonstatic_fields = |
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2912 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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2913 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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2914 ((nonstatic_double_count + nonstatic_word_count + |
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2915 nonstatic_short_count + nonstatic_byte_count + |
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2916 nonstatic_oop_count) != 0); |
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2917 |
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2918 |
0 | 2919 // Prepare list of oops for oop maps generation. |
2920 u2* nonstatic_oop_offsets; | |
2921 u2* nonstatic_oop_length; | |
2922 int nonstatic_oop_map_count = 0; | |
2923 | |
2924 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2925 THREAD, u2, nonstatic_oop_count+1); | |
2926 nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2927 THREAD, u2, nonstatic_oop_count+1); | |
2928 | |
2929 // Add fake fields for java.lang.Class instances (also see above). | |
2930 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
2931 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2932 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
2933 nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset; | |
2934 int fake_oop_count = (( next_nonstatic_field_offset - | |
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2935 first_nonstatic_field_offset ) / heapOopSize); |
0 | 2936 nonstatic_oop_length [0] = (u2)fake_oop_count; |
2937 nonstatic_oop_map_count = 1; | |
2938 nonstatic_oop_count -= fake_oop_count; | |
2939 first_nonstatic_oop_offset = first_nonstatic_field_offset; | |
2940 } else { | |
2941 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
2942 } | |
2943 | |
2944 #ifndef PRODUCT | |
2945 if( PrintCompactFieldsSavings ) { | |
2946 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
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2947 (nonstatic_oop_count * heapOopSize); |
0 | 2948 if ( nonstatic_double_count > 0 ) { |
2949 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
2950 } | |
2951 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
2952 (nonstatic_double_count * BytesPerLong); | |
2953 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
2954 (nonstatic_word_count * BytesPerInt); | |
2955 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
2956 (nonstatic_short_count * BytesPerShort); | |
2957 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
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2958 nonstatic_byte_count ), heapOopSize ); |
0 | 2959 orig_nonstatic_field_size = nonstatic_field_size + |
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2960 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
0 | 2961 } |
2962 #endif | |
2963 bool compact_fields = CompactFields; | |
2964 int allocation_style = FieldsAllocationStyle; | |
2965 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range? | |
2966 assert(false, "0 <= FieldsAllocationStyle <= 1"); | |
2967 allocation_style = 1; // Optimistic | |
2968 } | |
2969 | |
2970 // The next classes have predefined hard-coded fields offsets | |
2971 // (see in JavaClasses::compute_hard_coded_offsets()). | |
2972 // Use default fields allocation order for them. | |
2973 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
2974 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
2975 class_name() == vmSymbols::java_lang_Class() || | |
2976 class_name() == vmSymbols::java_lang_ClassLoader() || | |
2977 class_name() == vmSymbols::java_lang_ref_Reference() || | |
2978 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
2979 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
2980 class_name() == vmSymbols::java_lang_String() || | |
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2981 class_name() == vmSymbols::java_lang_Throwable() || |
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2982 class_name() == vmSymbols::java_lang_Boolean() || |
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2983 class_name() == vmSymbols::java_lang_Character() || |
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2984 class_name() == vmSymbols::java_lang_Float() || |
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2985 class_name() == vmSymbols::java_lang_Double() || |
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2986 class_name() == vmSymbols::java_lang_Byte() || |
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2987 class_name() == vmSymbols::java_lang_Short() || |
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2988 class_name() == vmSymbols::java_lang_Integer() || |
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2989 class_name() == vmSymbols::java_lang_Long())) { |
0 | 2990 allocation_style = 0; // Allocate oops first |
2991 compact_fields = false; // Don't compact fields | |
2992 } | |
2993 | |
2994 if( allocation_style == 0 ) { | |
2995 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
2996 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
2997 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
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2998 (nonstatic_oop_count * heapOopSize); |
0 | 2999 } else if( allocation_style == 1 ) { |
3000 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
3001 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
3002 } else { | |
3003 ShouldNotReachHere(); | |
3004 } | |
3005 | |
3006 int nonstatic_oop_space_count = 0; | |
3007 int nonstatic_word_space_count = 0; | |
3008 int nonstatic_short_space_count = 0; | |
3009 int nonstatic_byte_space_count = 0; | |
3010 int nonstatic_oop_space_offset; | |
3011 int nonstatic_word_space_offset; | |
3012 int nonstatic_short_space_offset; | |
3013 int nonstatic_byte_space_offset; | |
3014 | |
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3015 if( nonstatic_double_count > 0 ) { |
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3016 int offset = next_nonstatic_double_offset; |
0 | 3017 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
3018 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
3019 // Allocate available fields into the gap before double field. | |
3020 int length = next_nonstatic_double_offset - offset; | |
3021 assert(length == BytesPerInt, ""); | |
3022 nonstatic_word_space_offset = offset; | |
3023 if( nonstatic_word_count > 0 ) { | |
3024 nonstatic_word_count -= 1; | |
3025 nonstatic_word_space_count = 1; // Only one will fit | |
3026 length -= BytesPerInt; | |
3027 offset += BytesPerInt; | |
3028 } | |
3029 nonstatic_short_space_offset = offset; | |
3030 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
3031 nonstatic_short_count -= 1; | |
3032 nonstatic_short_space_count += 1; | |
3033 length -= BytesPerShort; | |
3034 offset += BytesPerShort; | |
3035 } | |
3036 nonstatic_byte_space_offset = offset; | |
3037 while( length > 0 && nonstatic_byte_count > 0 ) { | |
3038 nonstatic_byte_count -= 1; | |
3039 nonstatic_byte_space_count += 1; | |
3040 length -= 1; | |
3041 } | |
3042 // Allocate oop field in the gap if there are no other fields for that. | |
3043 nonstatic_oop_space_offset = offset; | |
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3044 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
0 | 3045 allocation_style != 0 ) { // when oop fields not first |
3046 nonstatic_oop_count -= 1; | |
3047 nonstatic_oop_space_count = 1; // Only one will fit | |
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3048 length -= heapOopSize; |
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3049 offset += heapOopSize; |
0 | 3050 } |
3051 } | |
3052 } | |
3053 | |
3054 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
3055 (nonstatic_double_count * BytesPerLong); | |
3056 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
3057 (nonstatic_word_count * BytesPerInt); | |
3058 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
3059 (nonstatic_short_count * BytesPerShort); | |
3060 | |
3061 int notaligned_offset; | |
3062 if( allocation_style == 0 ) { | |
3063 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
3064 } else { // allocation_style == 1 | |
3065 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
3066 if( nonstatic_oop_count > 0 ) { | |
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3067 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
0 | 3068 } |
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3069 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
0 | 3070 } |
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3071 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
0 | 3072 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
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3073 - first_nonstatic_field_offset)/heapOopSize); |
0 | 3074 |
3075 // Iterate over fields again and compute correct offsets. | |
3076 // The field allocation type was temporarily stored in the offset slot. | |
3077 // oop fields are located before non-oop fields (static and non-static). | |
3078 int len = fields->length(); | |
3079 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
3080 int real_offset; | |
3081 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4); | |
3082 switch (atype) { | |
3083 case STATIC_OOP: | |
3084 real_offset = next_static_oop_offset; | |
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3085 next_static_oop_offset += heapOopSize; |
0 | 3086 break; |
3087 case STATIC_BYTE: | |
3088 real_offset = next_static_byte_offset; | |
3089 next_static_byte_offset += 1; | |
3090 break; | |
3091 case STATIC_SHORT: | |
3092 real_offset = next_static_short_offset; | |
3093 next_static_short_offset += BytesPerShort; | |
3094 break; | |
3095 case STATIC_WORD: | |
3096 real_offset = next_static_word_offset; | |
3097 next_static_word_offset += BytesPerInt; | |
3098 break; | |
3099 case STATIC_ALIGNED_DOUBLE: | |
3100 case STATIC_DOUBLE: | |
3101 real_offset = next_static_double_offset; | |
3102 next_static_double_offset += BytesPerLong; | |
3103 break; | |
3104 case NONSTATIC_OOP: | |
3105 if( nonstatic_oop_space_count > 0 ) { | |
3106 real_offset = nonstatic_oop_space_offset; | |
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3107 nonstatic_oop_space_offset += heapOopSize; |
0 | 3108 nonstatic_oop_space_count -= 1; |
3109 } else { | |
3110 real_offset = next_nonstatic_oop_offset; | |
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3111 next_nonstatic_oop_offset += heapOopSize; |
0 | 3112 } |
3113 // Update oop maps | |
3114 if( nonstatic_oop_map_count > 0 && | |
3115 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
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3116 (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * heapOopSize) ) { |
0 | 3117 // Extend current oop map |
3118 nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1; | |
3119 } else { | |
3120 // Create new oop map | |
3121 nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset; | |
3122 nonstatic_oop_length [nonstatic_oop_map_count] = 1; | |
3123 nonstatic_oop_map_count += 1; | |
3124 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
3125 first_nonstatic_oop_offset = real_offset; | |
3126 } | |
3127 } | |
3128 break; | |
3129 case NONSTATIC_BYTE: | |
3130 if( nonstatic_byte_space_count > 0 ) { | |
3131 real_offset = nonstatic_byte_space_offset; | |
3132 nonstatic_byte_space_offset += 1; | |
3133 nonstatic_byte_space_count -= 1; | |
3134 } else { | |
3135 real_offset = next_nonstatic_byte_offset; | |
3136 next_nonstatic_byte_offset += 1; | |
3137 } | |
3138 break; | |
3139 case NONSTATIC_SHORT: | |
3140 if( nonstatic_short_space_count > 0 ) { | |
3141 real_offset = nonstatic_short_space_offset; | |
3142 nonstatic_short_space_offset += BytesPerShort; | |
3143 nonstatic_short_space_count -= 1; | |
3144 } else { | |
3145 real_offset = next_nonstatic_short_offset; | |
3146 next_nonstatic_short_offset += BytesPerShort; | |
3147 } | |
3148 break; | |
3149 case NONSTATIC_WORD: | |
3150 if( nonstatic_word_space_count > 0 ) { | |
3151 real_offset = nonstatic_word_space_offset; | |
3152 nonstatic_word_space_offset += BytesPerInt; | |
3153 nonstatic_word_space_count -= 1; | |
3154 } else { | |
3155 real_offset = next_nonstatic_word_offset; | |
3156 next_nonstatic_word_offset += BytesPerInt; | |
3157 } | |
3158 break; | |
3159 case NONSTATIC_ALIGNED_DOUBLE: | |
3160 case NONSTATIC_DOUBLE: | |
3161 real_offset = next_nonstatic_double_offset; | |
3162 next_nonstatic_double_offset += BytesPerLong; | |
3163 break; | |
3164 default: | |
3165 ShouldNotReachHere(); | |
3166 } | |
3167 fields->short_at_put(i+4, extract_low_short_from_int(real_offset) ); | |
3168 fields->short_at_put(i+5, extract_high_short_from_int(real_offset) ); | |
3169 } | |
3170 | |
3171 // Size of instances | |
3172 int instance_size; | |
3173 | |
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3174 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
0 | 3175 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
3176 | |
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3177 assert(instance_size == align_object_size(align_size_up((instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), wordSize) / wordSize), "consistent layout helper value"); |
0 | 3178 |
3179 // Size of non-static oop map blocks (in words) allocated at end of klass | |
3180 int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset); | |
3181 | |
3182 // Compute reference type | |
3183 ReferenceType rt; | |
3184 if (super_klass() == NULL) { | |
3185 rt = REF_NONE; | |
3186 } else { | |
3187 rt = super_klass->reference_type(); | |
3188 } | |
3189 | |
3190 // We can now create the basic klassOop for this klass | |
3191 klassOop ik = oopFactory::new_instanceKlass( | |
3192 vtable_size, itable_size, | |
3193 static_field_size, nonstatic_oop_map_size, | |
3194 rt, CHECK_(nullHandle)); | |
3195 instanceKlassHandle this_klass (THREAD, ik); | |
3196 | |
3197 assert(this_klass->static_field_size() == static_field_size && | |
3198 this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check"); | |
3199 | |
3200 // Fill in information already parsed | |
3201 this_klass->set_access_flags(access_flags); | |
3202 jint lh = Klass::instance_layout_helper(instance_size, false); | |
3203 this_klass->set_layout_helper(lh); | |
3204 assert(this_klass->oop_is_instance(), "layout is correct"); | |
3205 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
3206 // Not yet: supers are done below to support the new subtype-checking fields | |
3207 //this_klass->set_super(super_klass()); | |
3208 this_klass->set_class_loader(class_loader()); | |
3209 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
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3210 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
0 | 3211 this_klass->set_static_oop_field_size(fac.static_oop_count); |
3212 cp->set_pool_holder(this_klass()); | |
3213 this_klass->set_constants(cp()); | |
3214 this_klass->set_local_interfaces(local_interfaces()); | |
3215 this_klass->set_fields(fields()); | |
3216 this_klass->set_methods(methods()); | |
3217 if (has_final_method) { | |
3218 this_klass->set_has_final_method(); | |
3219 } | |
3220 this_klass->set_method_ordering(method_ordering()); | |
3221 this_klass->set_initial_method_idnum(methods->length()); | |
3222 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
710 | 3223 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself |
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3224 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
0 | 3225 this_klass->set_protection_domain(protection_domain()); |
3226 this_klass->set_fields_annotations(fields_annotations()); | |
3227 this_klass->set_methods_annotations(methods_annotations()); | |
3228 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
3229 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
3230 | |
3231 this_klass->set_minor_version(minor_version); | |
3232 this_klass->set_major_version(major_version); | |
3233 | |
3234 if (cached_class_file_bytes != NULL) { | |
3235 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
3236 this_klass->set_cached_class_file(cached_class_file_bytes, | |
3237 cached_class_file_length); | |
3238 } | |
3239 | |
3240 // Miranda methods | |
3241 if ((num_miranda_methods > 0) || | |
3242 // if this class introduced new miranda methods or | |
3243 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
3244 // super class exists and this class inherited miranda methods | |
3245 ) { | |
3246 this_klass->set_has_miranda_methods(); // then set a flag | |
3247 } | |
3248 | |
3249 // Additional attributes | |
3250 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
3251 | |
3252 // Make sure this is the end of class file stream | |
3253 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
3254 | |
3255 // Initialize static fields | |
3256 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
3257 | |
3258 // VerifyOops believes that once this has been set, the object is completely loaded. | |
3259 // Compute transitive closure of interfaces this class implements | |
3260 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
3261 | |
3262 // Fill in information needed to compute superclasses. | |
3263 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
3264 | |
3265 // Initialize itable offset tables | |
3266 klassItable::setup_itable_offset_table(this_klass); | |
3267 | |
3268 // Do final class setup | |
3269 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length); | |
3270 | |
3271 set_precomputed_flags(this_klass); | |
3272 | |
3273 // reinitialize modifiers, using the InnerClasses attribute | |
3274 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
3275 this_klass->set_modifier_flags(computed_modifiers); | |
3276 | |
3277 // check if this class can access its super class | |
3278 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
3279 | |
3280 // check if this class can access its superinterfaces | |
3281 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
3282 | |
3283 // check if this class overrides any final method | |
3284 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
3285 | |
3286 // check that if this class is an interface then it doesn't have static methods | |
3287 if (this_klass->is_interface()) { | |
3288 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
3289 } | |
3290 | |
3291 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
3292 false /* not shared class */); | |
3293 | |
3294 if (TraceClassLoading) { | |
3295 // print in a single call to reduce interleaving of output | |
3296 if (cfs->source() != NULL) { | |
3297 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3298 cfs->source()); | |
3299 } else if (class_loader.is_null()) { | |
3300 if (THREAD->is_Java_thread()) { | |
3301 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
3302 tty->print("[Loaded %s by instance of %s]\n", | |
3303 this_klass->external_name(), | |
3304 instanceKlass::cast(caller)->external_name()); | |
3305 } else { | |
3306 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
3307 } | |
3308 } else { | |
3309 ResourceMark rm; | |
3310 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3311 instanceKlass::cast(class_loader->klass())->external_name()); | |
3312 } | |
3313 } | |
3314 | |
3315 if (TraceClassResolution) { | |
3316 // print out the superclass. | |
3317 const char * from = Klass::cast(this_klass())->external_name(); | |
3318 if (this_klass->java_super() != NULL) { | |
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3319 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); |
0 | 3320 } |
3321 // print out each of the interface classes referred to by this class. | |
3322 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
3323 if (!local_interfaces.is_null()) { | |
3324 int length = local_interfaces->length(); | |
3325 for (int i = 0; i < length; i++) { | |
3326 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3327 instanceKlass* to_class = instanceKlass::cast(k); | |
3328 const char * to = to_class->external_name(); | |
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3329 tty->print("RESOLVE %s %s (interface)\n", from, to); |
0 | 3330 } |
3331 } | |
3332 } | |
3333 | |
3334 #ifndef PRODUCT | |
3335 if( PrintCompactFieldsSavings ) { | |
3336 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
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3337 tty->print("[Saved %d of %d bytes in %s]\n", |
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3338 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
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3339 orig_nonstatic_field_size*heapOopSize, |
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3340 this_klass->external_name()); |
0 | 3341 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
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3342 tty->print("[Wasted %d over %d bytes in %s]\n", |
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3343 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
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3344 orig_nonstatic_field_size*heapOopSize, |
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3345 this_klass->external_name()); |
0 | 3346 } |
3347 } | |
3348 #endif | |
3349 | |
3350 // preserve result across HandleMark | |
3351 preserve_this_klass = this_klass(); | |
3352 } | |
3353 | |
3354 // Create new handle outside HandleMark | |
3355 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
3356 debug_only(this_klass->as_klassOop()->verify();) | |
3357 | |
3358 return this_klass; | |
3359 } | |
3360 | |
3361 | |
3362 int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) { | |
3363 int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size(); | |
3364 if (nonstatic_oop_map_count > 0) { | |
3365 // We have oops to add to map | |
3366 if (map_size == 0) { | |
3367 map_size = nonstatic_oop_map_count; | |
3368 } else { | |
3369 // Check whether we should add a new map block or whether the last one can be extended | |
3370 OopMapBlock* first_map = super->start_of_nonstatic_oop_maps(); | |
3371 OopMapBlock* last_map = first_map + map_size - 1; | |
3372 | |
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3373 int next_offset = last_map->offset() + (last_map->length() * heapOopSize); |
0 | 3374 if (next_offset == first_nonstatic_oop_offset) { |
3375 // There is no gap bettwen superklass's last oop field and first | |
3376 // local oop field, merge maps. | |
3377 nonstatic_oop_map_count -= 1; | |
3378 } else { | |
3379 // Superklass didn't end with a oop field, add extra maps | |
3380 assert(next_offset<first_nonstatic_oop_offset, "just checking"); | |
3381 } | |
3382 map_size += nonstatic_oop_map_count; | |
3383 } | |
3384 } | |
3385 return map_size; | |
3386 } | |
3387 | |
3388 | |
3389 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
3390 int nonstatic_oop_map_count, | |
3391 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) { | |
3392 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); | |
3393 OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size(); | |
3394 instanceKlass* super = k->superklass(); | |
3395 if (super != NULL) { | |
3396 int super_oop_map_size = super->nonstatic_oop_map_size(); | |
3397 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); | |
3398 // Copy maps from superklass | |
3399 while (super_oop_map_size-- > 0) { | |
3400 *this_oop_map++ = *super_oop_map++; | |
3401 } | |
3402 } | |
3403 if (nonstatic_oop_map_count > 0) { | |
3404 if (this_oop_map + nonstatic_oop_map_count > last_oop_map) { | |
3405 // Calculated in compute_oop_map_size() number of oop maps is less then | |
3406 // collected oop maps since there is no gap between superklass's last oop | |
3407 // field and first local oop field. Extend the last oop map copied | |
3408 // from the superklass instead of creating new one. | |
3409 nonstatic_oop_map_count--; | |
3410 nonstatic_oop_offsets++; | |
3411 this_oop_map--; | |
3412 this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++); | |
3413 this_oop_map++; | |
3414 } | |
3415 assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking"); | |
3416 // Add new map blocks, fill them | |
3417 while (nonstatic_oop_map_count-- > 0) { | |
3418 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
3419 this_oop_map->set_length(*nonstatic_oop_length++); | |
3420 this_oop_map++; | |
3421 } | |
3422 } | |
3423 } | |
3424 | |
3425 | |
3426 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
3427 klassOop super = k->super(); | |
3428 | |
3429 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
3430 // in which case we don't have to register objects as finalizable | |
3431 if (!_has_empty_finalizer) { | |
3432 if (_has_finalizer || | |
3433 (super != NULL && super->klass_part()->has_finalizer())) { | |
3434 k->set_has_finalizer(); | |
3435 } | |
3436 } | |
3437 | |
3438 #ifdef ASSERT | |
3439 bool f = false; | |
3440 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
3441 vmSymbols::void_method_signature()); | |
3442 if (m != NULL && !m->is_empty_method()) { | |
3443 f = true; | |
3444 } | |
3445 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
3446 #endif | |
3447 | |
3448 // Check if this klass supports the java.lang.Cloneable interface | |
3449 if (SystemDictionary::cloneable_klass_loaded()) { | |
3450 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) { | |
3451 k->set_is_cloneable(); | |
3452 } | |
3453 } | |
3454 | |
3455 // Check if this klass has a vanilla default constructor | |
3456 if (super == NULL) { | |
3457 // java.lang.Object has empty default constructor | |
3458 k->set_has_vanilla_constructor(); | |
3459 } else { | |
3460 if (Klass::cast(super)->has_vanilla_constructor() && | |
3461 _has_vanilla_constructor) { | |
3462 k->set_has_vanilla_constructor(); | |
3463 } | |
3464 #ifdef ASSERT | |
3465 bool v = false; | |
3466 if (Klass::cast(super)->has_vanilla_constructor()) { | |
3467 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
3468 ), vmSymbols::void_method_signature()); | |
3469 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
3470 v = true; | |
3471 } | |
3472 } | |
3473 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
3474 #endif | |
3475 } | |
3476 | |
3477 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
3478 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
3479 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
3480 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
3481 || k->is_abstract() || k->is_interface() | |
3482 || (k->name() == vmSymbols::java_lang_Class() | |
3483 && k->class_loader() == NULL) | |
3484 || k->size_helper() >= FastAllocateSizeLimit) { | |
3485 // Forbid fast-path allocation. | |
3486 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
3487 k->set_layout_helper(lh); | |
3488 } | |
3489 } | |
3490 | |
3491 | |
3492 // utility method for appending and array with check for duplicates | |
3493 | |
3494 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
3495 // iterate over new interfaces | |
3496 for (int i = 0; i < ifs->length(); i++) { | |
3497 oop e = ifs->obj_at(i); | |
3498 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
3499 // check for duplicates | |
3500 bool duplicate = false; | |
3501 for (int j = 0; j < index; j++) { | |
3502 if (result->obj_at(j) == e) { | |
3503 duplicate = true; | |
3504 break; | |
3505 } | |
3506 } | |
3507 // add new interface | |
3508 if (!duplicate) { | |
3509 result->obj_at_put(index++, e); | |
3510 } | |
3511 } | |
3512 } | |
3513 | |
3514 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
3515 // Compute maximum size for transitive interfaces | |
3516 int max_transitive_size = 0; | |
3517 int super_size = 0; | |
3518 // Add superclass transitive interfaces size | |
3519 if (super.not_null()) { | |
3520 super_size = super->transitive_interfaces()->length(); | |
3521 max_transitive_size += super_size; | |
3522 } | |
3523 // Add local interfaces' super interfaces | |
3524 int local_size = local_ifs->length(); | |
3525 for (int i = 0; i < local_size; i++) { | |
3526 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3527 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
3528 } | |
3529 // Finally add local interfaces | |
3530 max_transitive_size += local_size; | |
3531 // Construct array | |
3532 objArrayHandle result; | |
3533 if (max_transitive_size == 0) { | |
3534 // no interfaces, use canonicalized array | |
3535 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
3536 } else if (max_transitive_size == super_size) { | |
3537 // no new local interfaces added, share superklass' transitive interface array | |
3538 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
3539 } else if (max_transitive_size == local_size) { | |
3540 // only local interfaces added, share local interface array | |
3541 result = local_ifs; | |
3542 } else { | |
3543 objArrayHandle nullHandle; | |
3544 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
3545 result = objArrayHandle(THREAD, new_objarray); | |
3546 int index = 0; | |
3547 // Copy down from superclass | |
3548 if (super.not_null()) { | |
3549 append_interfaces(result, index, super->transitive_interfaces()); | |
3550 } | |
3551 // Copy down from local interfaces' superinterfaces | |
3552 for (int i = 0; i < local_ifs->length(); i++) { | |
3553 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3554 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
3555 } | |
3556 // Finally add local interfaces | |
3557 append_interfaces(result, index, local_ifs()); | |
3558 | |
3559 // Check if duplicates were removed | |
3560 if (index != max_transitive_size) { | |
3561 assert(index < max_transitive_size, "just checking"); | |
3562 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
3563 for (int i = 0; i < index; i++) { | |
3564 oop e = result->obj_at(i); | |
3565 assert(e != NULL, "just checking"); | |
3566 new_result->obj_at_put(i, e); | |
3567 } | |
3568 result = objArrayHandle(THREAD, new_result); | |
3569 } | |
3570 } | |
3571 return result; | |
3572 } | |
3573 | |
3574 | |
3575 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
3576 klassOop super = this_klass->super(); | |
3577 if ((super != NULL) && | |
3578 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
3579 ResourceMark rm(THREAD); | |
3580 Exceptions::fthrow( | |
3581 THREAD_AND_LOCATION, | |
3582 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3583 "class %s cannot access its superclass %s", | |
3584 this_klass->external_name(), | |
3585 instanceKlass::cast(super)->external_name() | |
3586 ); | |
3587 return; | |
3588 } | |
3589 } | |
3590 | |
3591 | |
3592 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
3593 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
3594 int lng = local_interfaces->length(); | |
3595 for (int i = lng - 1; i >= 0; i--) { | |
3596 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3597 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
3598 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
3599 ResourceMark rm(THREAD); | |
3600 Exceptions::fthrow( | |
3601 THREAD_AND_LOCATION, | |
3602 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3603 "class %s cannot access its superinterface %s", | |
3604 this_klass->external_name(), | |
3605 instanceKlass::cast(k)->external_name() | |
3606 ); | |
3607 return; | |
3608 } | |
3609 } | |
3610 } | |
3611 | |
3612 | |
3613 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
3614 objArrayHandle methods (THREAD, this_klass->methods()); | |
3615 int num_methods = methods->length(); | |
3616 | |
3617 // go thru each method and check if it overrides a final method | |
3618 for (int index = 0; index < num_methods; index++) { | |
3619 methodOop m = (methodOop)methods->obj_at(index); | |
3620 | |
3621 // skip private, static and <init> methods | |
3622 if ((!m->is_private()) && | |
3623 (!m->is_static()) && | |
3624 (m->name() != vmSymbols::object_initializer_name())) { | |
3625 | |
3626 symbolOop name = m->name(); | |
3627 symbolOop signature = m->signature(); | |
3628 klassOop k = this_klass->super(); | |
3629 methodOop super_m = NULL; | |
3630 while (k != NULL) { | |
3631 // skip supers that don't have final methods. | |
3632 if (k->klass_part()->has_final_method()) { | |
3633 // lookup a matching method in the super class hierarchy | |
3634 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
3635 if (super_m == NULL) { | |
3636 break; // didn't find any match; get out | |
3637 } | |
3638 | |
3639 if (super_m->is_final() && | |
3640 // matching method in super is final | |
3641 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
3642 super_m->method_holder(), | |
3643 super_m->method_holder(), | |
3644 super_m->access_flags(), false)) | |
3645 // this class can access super final method and therefore override | |
3646 ) { | |
3647 ResourceMark rm(THREAD); | |
3648 Exceptions::fthrow( | |
3649 THREAD_AND_LOCATION, | |
3650 vmSymbolHandles::java_lang_VerifyError(), | |
3651 "class %s overrides final method %s.%s", | |
3652 this_klass->external_name(), | |
3653 name->as_C_string(), | |
3654 signature->as_C_string() | |
3655 ); | |
3656 return; | |
3657 } | |
3658 | |
3659 // continue to look from super_m's holder's super. | |
3660 k = instanceKlass::cast(super_m->method_holder())->super(); | |
3661 continue; | |
3662 } | |
3663 | |
3664 k = k->klass_part()->super(); | |
3665 } | |
3666 } | |
3667 } | |
3668 } | |
3669 | |
3670 | |
3671 // assumes that this_klass is an interface | |
3672 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
3673 assert(this_klass->is_interface(), "not an interface"); | |
3674 objArrayHandle methods (THREAD, this_klass->methods()); | |
3675 int num_methods = methods->length(); | |
3676 | |
3677 for (int index = 0; index < num_methods; index++) { | |
3678 methodOop m = (methodOop)methods->obj_at(index); | |
3679 // if m is static and not the init method, throw a verify error | |
3680 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
3681 ResourceMark rm(THREAD); | |
3682 Exceptions::fthrow( | |
3683 THREAD_AND_LOCATION, | |
3684 vmSymbolHandles::java_lang_VerifyError(), | |
3685 "Illegal static method %s in interface %s", | |
3686 m->name()->as_C_string(), | |
3687 this_klass->external_name() | |
3688 ); | |
3689 return; | |
3690 } | |
3691 } | |
3692 } | |
3693 | |
3694 // utility methods for format checking | |
3695 | |
3696 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
3697 if (!_need_verify) { return; } | |
3698 | |
3699 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
3700 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3701 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3702 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
3703 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3704 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
3705 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3706 | |
3707 if ((is_abstract && is_final) || | |
3708 (is_interface && !is_abstract) || | |
3709 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
3710 (!is_interface && major_gte_15 && is_annotation)) { | |
3711 ResourceMark rm(THREAD); | |
3712 Exceptions::fthrow( | |
3713 THREAD_AND_LOCATION, | |
3714 vmSymbolHandles::java_lang_ClassFormatError(), | |
3715 "Illegal class modifiers in class %s: 0x%X", | |
3716 _class_name->as_C_string(), flags | |
3717 ); | |
3718 return; | |
3719 } | |
3720 } | |
3721 | |
3722 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
3723 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3724 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3725 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3726 | |
3727 return ((is_public && is_protected) || | |
3728 (is_public && is_private) || | |
3729 (is_protected && is_private)); | |
3730 } | |
3731 | |
3732 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
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3733 u2 max_version = JDK_Version::is_gte_jdk17x_version() ? |
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3734 JAVA_MAX_SUPPORTED_VERSION : JAVA_6_VERSION; |
0 | 3735 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
176
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3736 (major <= max_version) && |
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3737 ((major != max_version) || |
0 | 3738 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
3739 } | |
3740 | |
3741 void ClassFileParser::verify_legal_field_modifiers( | |
3742 jint flags, bool is_interface, TRAPS) { | |
3743 if (!_need_verify) { return; } | |
3744 | |
3745 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3746 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3747 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3748 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3749 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3750 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
3751 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
3752 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3753 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3754 | |
3755 bool is_illegal = false; | |
3756 | |
3757 if (is_interface) { | |
3758 if (!is_public || !is_static || !is_final || is_private || | |
3759 is_protected || is_volatile || is_transient || | |
3760 (major_gte_15 && is_enum)) { | |
3761 is_illegal = true; | |
3762 } | |
3763 } else { // not interface | |
3764 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
3765 is_illegal = true; | |
3766 } | |
3767 } | |
3768 | |
3769 if (is_illegal) { | |
3770 ResourceMark rm(THREAD); | |
3771 Exceptions::fthrow( | |
3772 THREAD_AND_LOCATION, | |
3773 vmSymbolHandles::java_lang_ClassFormatError(), | |
3774 "Illegal field modifiers in class %s: 0x%X", | |
3775 _class_name->as_C_string(), flags); | |
3776 return; | |
3777 } | |
3778 } | |
3779 | |
3780 void ClassFileParser::verify_legal_method_modifiers( | |
3781 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
3782 if (!_need_verify) { return; } | |
3783 | |
3784 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3785 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3786 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3787 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3788 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
3789 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3790 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
3791 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
3792 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
3793 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3794 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
3795 | |
3796 bool is_illegal = false; | |
3797 | |
3798 if (is_interface) { | |
3799 if (!is_abstract || !is_public || is_static || is_final || | |
3800 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
3801 is_illegal = true; | |
3802 } | |
3803 } else { // not interface | |
3804 if (is_initializer) { | |
3805 if (is_static || is_final || is_synchronized || is_native || | |
3806 is_abstract || (major_gte_15 && is_bridge)) { | |
3807 is_illegal = true; | |
3808 } | |
3809 } else { // not initializer | |
3810 if (is_abstract) { | |
3811 if ((is_final || is_native || is_private || is_static || | |
3812 (major_gte_15 && (is_synchronized || is_strict)))) { | |
3813 is_illegal = true; | |
3814 } | |
3815 } | |
3816 if (has_illegal_visibility(flags)) { | |
3817 is_illegal = true; | |
3818 } | |
3819 } | |
3820 } | |
3821 | |
3822 if (is_illegal) { | |
3823 ResourceMark rm(THREAD); | |
3824 Exceptions::fthrow( | |
3825 THREAD_AND_LOCATION, | |
3826 vmSymbolHandles::java_lang_ClassFormatError(), | |
3827 "Method %s in class %s has illegal modifiers: 0x%X", | |
3828 name->as_C_string(), _class_name->as_C_string(), flags); | |
3829 return; | |
3830 } | |
3831 } | |
3832 | |
3833 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
3834 assert(_need_verify, "only called when _need_verify is true"); | |
3835 int i = 0; | |
3836 int count = length >> 2; | |
3837 for (int k=0; k<count; k++) { | |
3838 unsigned char b0 = buffer[i]; | |
3839 unsigned char b1 = buffer[i+1]; | |
3840 unsigned char b2 = buffer[i+2]; | |
3841 unsigned char b3 = buffer[i+3]; | |
3842 // For an unsigned char v, | |
3843 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
3844 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
3845 unsigned char res = b0 | b0 - 1 | | |
3846 b1 | b1 - 1 | | |
3847 b2 | b2 - 1 | | |
3848 b3 | b3 - 1; | |
3849 if (res >= 128) break; | |
3850 i += 4; | |
3851 } | |
3852 for(; i < length; i++) { | |
3853 unsigned short c; | |
3854 // no embedded zeros | |
3855 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3856 if(buffer[i] < 128) { | |
3857 continue; | |
3858 } | |
3859 if ((i + 5) < length) { // see if it's legal supplementary character | |
3860 if (UTF8::is_supplementary_character(&buffer[i])) { | |
3861 c = UTF8::get_supplementary_character(&buffer[i]); | |
3862 i += 5; | |
3863 continue; | |
3864 } | |
3865 } | |
3866 switch (buffer[i] >> 4) { | |
3867 default: break; | |
3868 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
3869 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3870 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
3871 c = (buffer[i] & 0x1F) << 6; | |
3872 i++; | |
3873 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
3874 c += buffer[i] & 0x3F; | |
3875 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
3876 // for classes with major > 47, c must a null or a character in its shortest form | |
3877 break; | |
3878 } | |
3879 } | |
3880 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3881 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
3882 c = (buffer[i] & 0xF) << 12; | |
3883 i += 2; | |
3884 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
3885 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
3886 if (_major_version <= 47 || c >= 0x800) { | |
3887 // for classes with major > 47, c must be in its shortest form | |
3888 break; | |
3889 } | |
3890 } | |
3891 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3892 } // end of switch | |
3893 } // end of for | |
3894 } | |
3895 | |
3896 // Checks if name is a legal class name. | |
3897 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
3898 if (!_need_verify || _relax_verify) { return; } | |
3899 | |
3900 char buf[fixed_buffer_size]; | |
3901 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3902 unsigned int length = name->utf8_length(); | |
3903 bool legal = false; | |
3904 | |
3905 if (length > 0) { | |
3906 char* p; | |
3907 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
3908 p = skip_over_field_signature(bytes, false, length, CHECK); | |
3909 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3910 } else if (_major_version < JAVA_1_5_VERSION) { | |
3911 if (bytes[0] != '<') { | |
3912 p = skip_over_field_name(bytes, true, length); | |
3913 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3914 } | |
3915 } else { | |
3916 // 4900761: relax the constraints based on JSR202 spec | |
3917 // Class names may be drawn from the entire Unicode character set. | |
3918 // Identifiers between '/' must be unqualified names. | |
3919 // The utf8 string has been verified when parsing cpool entries. | |
3920 legal = verify_unqualified_name(bytes, length, LegalClass); | |
3921 } | |
3922 } | |
3923 if (!legal) { | |
3924 ResourceMark rm(THREAD); | |
3925 Exceptions::fthrow( | |
3926 THREAD_AND_LOCATION, | |
3927 vmSymbolHandles::java_lang_ClassFormatError(), | |
3928 "Illegal class name \"%s\" in class file %s", bytes, | |
3929 _class_name->as_C_string() | |
3930 ); | |
3931 return; | |
3932 } | |
3933 } | |
3934 | |
3935 // Checks if name is a legal field name. | |
3936 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
3937 if (!_need_verify || _relax_verify) { return; } | |
3938 | |
3939 char buf[fixed_buffer_size]; | |
3940 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3941 unsigned int length = name->utf8_length(); | |
3942 bool legal = false; | |
3943 | |
3944 if (length > 0) { | |
3945 if (_major_version < JAVA_1_5_VERSION) { | |
3946 if (bytes[0] != '<') { | |
3947 char* p = skip_over_field_name(bytes, false, length); | |
3948 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3949 } | |
3950 } else { | |
3951 // 4881221: relax the constraints based on JSR202 spec | |
3952 legal = verify_unqualified_name(bytes, length, LegalField); | |
3953 } | |
3954 } | |
3955 | |
3956 if (!legal) { | |
3957 ResourceMark rm(THREAD); | |
3958 Exceptions::fthrow( | |
3959 THREAD_AND_LOCATION, | |
3960 vmSymbolHandles::java_lang_ClassFormatError(), | |
3961 "Illegal field name \"%s\" in class %s", bytes, | |
3962 _class_name->as_C_string() | |
3963 ); | |
3964 return; | |
3965 } | |
3966 } | |
3967 | |
3968 // Checks if name is a legal method name. | |
3969 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
3970 if (!_need_verify || _relax_verify) { return; } | |
3971 | |
3972 assert(!name.is_null(), "method name is null"); | |
3973 char buf[fixed_buffer_size]; | |
3974 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3975 unsigned int length = name->utf8_length(); | |
3976 bool legal = false; | |
3977 | |
3978 if (length > 0) { | |
3979 if (bytes[0] == '<') { | |
3980 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
3981 legal = true; | |
3982 } | |
3983 } else if (_major_version < JAVA_1_5_VERSION) { | |
3984 char* p; | |
3985 p = skip_over_field_name(bytes, false, length); | |
3986 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3987 } else { | |
3988 // 4881221: relax the constraints based on JSR202 spec | |
3989 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
3990 } | |
3991 } | |
3992 | |
3993 if (!legal) { | |
3994 ResourceMark rm(THREAD); | |
3995 Exceptions::fthrow( | |
3996 THREAD_AND_LOCATION, | |
3997 vmSymbolHandles::java_lang_ClassFormatError(), | |
3998 "Illegal method name \"%s\" in class %s", bytes, | |
3999 _class_name->as_C_string() | |
4000 ); | |
4001 return; | |
4002 } | |
4003 } | |
4004 | |
4005 | |
4006 // Checks if signature is a legal field signature. | |
4007 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
4008 if (!_need_verify) { return; } | |
4009 | |
4010 char buf[fixed_buffer_size]; | |
4011 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
4012 unsigned int length = signature->utf8_length(); | |
4013 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
4014 | |
4015 if (p == NULL || (p - bytes) != (int)length) { | |
4016 ResourceMark rm(THREAD); | |
4017 Exceptions::fthrow( | |
4018 THREAD_AND_LOCATION, | |
4019 vmSymbolHandles::java_lang_ClassFormatError(), | |
4020 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
4021 name->as_C_string(), _class_name->as_C_string(), bytes | |
4022 ); | |
4023 return; | |
4024 } | |
4025 } | |
4026 | |
4027 // Checks if signature is a legal method signature. | |
4028 // Returns number of parameters | |
4029 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
4030 if (!_need_verify) { | |
4031 // make sure caller's args_size will be less than 0 even for non-static | |
4032 // method so it will be recomputed in compute_size_of_parameters(). | |
4033 return -2; | |
4034 } | |
4035 | |
4036 unsigned int args_size = 0; | |
4037 char buf[fixed_buffer_size]; | |
4038 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
4039 unsigned int length = signature->utf8_length(); | |
4040 char* nextp; | |
4041 | |
4042 // The first character must be a '(' | |
4043 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
4044 length--; | |
4045 // Skip over legal field signatures | |
4046 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
4047 while ((length > 0) && (nextp != NULL)) { | |
4048 args_size++; | |
4049 if (p[0] == 'J' || p[0] == 'D') { | |
4050 args_size++; | |
4051 } | |
4052 length -= nextp - p; | |
4053 p = nextp; | |
4054 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
4055 } | |
4056 // The first non-signature thing better be a ')' | |
4057 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
4058 length--; | |
4059 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
4060 // All internal methods must return void | |
4061 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
4062 return args_size; | |
4063 } | |
4064 } else { | |
4065 // Now we better just have a return value | |
4066 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
4067 if (nextp && ((int)length == (nextp - p))) { | |
4068 return args_size; | |
4069 } | |
4070 } | |
4071 } | |
4072 } | |
4073 // Report error | |
4074 ResourceMark rm(THREAD); | |
4075 Exceptions::fthrow( | |
4076 THREAD_AND_LOCATION, | |
4077 vmSymbolHandles::java_lang_ClassFormatError(), | |
4078 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
4079 name->as_C_string(), _class_name->as_C_string(), p | |
4080 ); | |
4081 return 0; | |
4082 } | |
4083 | |
4084 | |
4085 // Unqualified names may not contain the characters '.', ';', or '/'. | |
4086 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
4087 // Note that method names may not be <init> or <clinit> in this method. | |
4088 // Because these names have been checked as special cases before calling this method | |
4089 // in verify_legal_method_name. | |
4090 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
4091 jchar ch; | |
4092 | |
4093 for (char* p = name; p != name + length; ) { | |
4094 ch = *p; | |
4095 if (ch < 128) { | |
4096 p++; | |
4097 if (ch == '.' || ch == ';') { | |
4098 return false; // do not permit '.' or ';' | |
4099 } | |
4100 if (type != LegalClass && ch == '/') { | |
4101 return false; // do not permit '/' unless it's class name | |
4102 } | |
4103 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
4104 return false; // do not permit '<' or '>' in method names | |
4105 } | |
4106 } else { | |
4107 char* tmp_p = UTF8::next(p, &ch); | |
4108 p = tmp_p; | |
4109 } | |
4110 } | |
4111 return true; | |
4112 } | |
4113 | |
4114 | |
4115 // Take pointer to a string. Skip over the longest part of the string that could | |
4116 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
4117 // Return a pointer to just past the fieldname. | |
4118 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
4119 // being true, we saw consecutive slashes (meaning we were looking for a | |
4120 // qualified path but found something that was badly-formed). | |
4121 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
4122 char* p; | |
4123 jchar ch; | |
4124 jboolean last_is_slash = false; | |
4125 jboolean not_first_ch = false; | |
4126 | |
4127 for (p = name; p != name + length; not_first_ch = true) { | |
4128 char* old_p = p; | |
4129 ch = *p; | |
4130 if (ch < 128) { | |
4131 p++; | |
4132 // quick check for ascii | |
4133 if ((ch >= 'a' && ch <= 'z') || | |
4134 (ch >= 'A' && ch <= 'Z') || | |
4135 (ch == '_' || ch == '$') || | |
4136 (not_first_ch && ch >= '0' && ch <= '9')) { | |
4137 last_is_slash = false; | |
4138 continue; | |
4139 } | |
4140 if (slash_ok && ch == '/') { | |
4141 if (last_is_slash) { | |
4142 return NULL; // Don't permit consecutive slashes | |
4143 } | |
4144 last_is_slash = true; | |
4145 continue; | |
4146 } | |
4147 } else { | |
4148 jint unicode_ch; | |
4149 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
4150 p = tmp_p; | |
4151 last_is_slash = false; | |
4152 // Check if ch is Java identifier start or is Java identifier part | |
4153 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
4154 EXCEPTION_MARK; | |
4155 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass()); | |
4156 | |
4157 // return value | |
4158 JavaValue result(T_BOOLEAN); | |
4159 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
4160 JavaCallArguments args; | |
4161 args.push_int(unicode_ch); | |
4162 | |
4163 // public static boolean isJavaIdentifierStart(char ch); | |
4164 JavaCalls::call_static(&result, | |
4165 klass, | |
4166 vmSymbolHandles::isJavaIdentifierStart_name(), | |
4167 vmSymbolHandles::int_bool_signature(), | |
4168 &args, | |
4169 THREAD); | |
4170 | |
4171 if (HAS_PENDING_EXCEPTION) { | |
4172 CLEAR_PENDING_EXCEPTION; | |
4173 return 0; | |
4174 } | |
4175 if (result.get_jboolean()) { | |
4176 continue; | |
4177 } | |
4178 | |
4179 if (not_first_ch) { | |
4180 // public static boolean isJavaIdentifierPart(char ch); | |
4181 JavaCalls::call_static(&result, | |
4182 klass, | |
4183 vmSymbolHandles::isJavaIdentifierPart_name(), | |
4184 vmSymbolHandles::int_bool_signature(), | |
4185 &args, | |
4186 THREAD); | |
4187 | |
4188 if (HAS_PENDING_EXCEPTION) { | |
4189 CLEAR_PENDING_EXCEPTION; | |
4190 return 0; | |
4191 } | |
4192 | |
4193 if (result.get_jboolean()) { | |
4194 continue; | |
4195 } | |
4196 } | |
4197 } | |
4198 return (not_first_ch) ? old_p : NULL; | |
4199 } | |
4200 return (not_first_ch) ? p : NULL; | |
4201 } | |
4202 | |
4203 | |
4204 // Take pointer to a string. Skip over the longest part of the string that could | |
4205 // be taken as a field signature. Allow "void" if void_ok. | |
4206 // Return a pointer to just past the signature. | |
4207 // Return NULL if no legal signature is found. | |
4208 char* ClassFileParser::skip_over_field_signature(char* signature, | |
4209 bool void_ok, | |
4210 unsigned int length, | |
4211 TRAPS) { | |
4212 unsigned int array_dim = 0; | |
4213 while (length > 0) { | |
4214 switch (signature[0]) { | |
4215 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
4216 case JVM_SIGNATURE_BOOLEAN: | |
4217 case JVM_SIGNATURE_BYTE: | |
4218 case JVM_SIGNATURE_CHAR: | |
4219 case JVM_SIGNATURE_SHORT: | |
4220 case JVM_SIGNATURE_INT: | |
4221 case JVM_SIGNATURE_FLOAT: | |
4222 case JVM_SIGNATURE_LONG: | |
4223 case JVM_SIGNATURE_DOUBLE: | |
4224 return signature + 1; | |
4225 case JVM_SIGNATURE_CLASS: { | |
4226 if (_major_version < JAVA_1_5_VERSION) { | |
4227 // Skip over the class name if one is there | |
4228 char* p = skip_over_field_name(signature + 1, true, --length); | |
4229 | |
4230 // The next character better be a semicolon | |
4231 if (p && (p - signature) > 1 && p[0] == ';') { | |
4232 return p + 1; | |
4233 } | |
4234 } else { | |
4235 // 4900761: For class version > 48, any unicode is allowed in class name. | |
4236 length--; | |
4237 signature++; | |
4238 while (length > 0 && signature[0] != ';') { | |
4239 if (signature[0] == '.') { | |
4240 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
4241 } | |
4242 length--; | |
4243 signature++; | |
4244 } | |
4245 if (signature[0] == ';') { return signature + 1; } | |
4246 } | |
4247 | |
4248 return NULL; | |
4249 } | |
4250 case JVM_SIGNATURE_ARRAY: | |
4251 array_dim++; | |
4252 if (array_dim > 255) { | |
4253 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
4254 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
4255 } | |
4256 // The rest of what's there better be a legal signature | |
4257 signature++; | |
4258 length--; | |
4259 void_ok = false; | |
4260 break; | |
4261 | |
4262 default: | |
4263 return NULL; | |
4264 } | |
4265 } | |
4266 return NULL; | |
4267 } |