Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/classFileParser.cpp @ 431:a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
Summary: low-level privileged sun.misc.Unsafe.defineAnonymousClass
Reviewed-by: kvn
author | jrose |
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date | Wed, 12 Nov 2008 22:33:26 -0800 |
parents | d1605aabd0a1 |
children | 7a018855d2f0 |
rev | line source |
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0 | 1 /* |
196 | 2 * Copyright 1997-2008 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 = | |
235 oopFactory::new_constantPool(length, CHECK_(nullHandle)); | |
236 constantPoolHandle cp (THREAD, constant_pool); | |
237 | |
238 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
239 | |
240 // parsing constant pool entries | |
241 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
242 | |
243 int index = 1; // declared outside of loops for portability | |
244 | |
245 // first verification pass - validate cross references and fixup class and string constants | |
246 for (index = 1; index < length; index++) { // Index 0 is unused | |
247 switch (cp->tag_at(index).value()) { | |
248 case JVM_CONSTANT_Class : | |
249 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
250 break; | |
251 case JVM_CONSTANT_Fieldref : | |
252 // fall through | |
253 case JVM_CONSTANT_Methodref : | |
254 // fall through | |
255 case JVM_CONSTANT_InterfaceMethodref : { | |
256 if (!_need_verify) break; | |
257 int klass_ref_index = cp->klass_ref_index_at(index); | |
258 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
259 check_property(valid_cp_range(klass_ref_index, length) && | |
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260 is_klass_reference(cp, klass_ref_index), |
0 | 261 "Invalid constant pool index %u in class file %s", |
262 klass_ref_index, | |
263 CHECK_(nullHandle)); | |
264 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
265 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
266 "Invalid constant pool index %u in class file %s", | |
267 name_and_type_ref_index, | |
268 CHECK_(nullHandle)); | |
269 break; | |
270 } | |
271 case JVM_CONSTANT_String : | |
272 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
273 break; | |
274 case JVM_CONSTANT_Integer : | |
275 break; | |
276 case JVM_CONSTANT_Float : | |
277 break; | |
278 case JVM_CONSTANT_Long : | |
279 case JVM_CONSTANT_Double : | |
280 index++; | |
281 check_property( | |
282 (index < length && cp->tag_at(index).is_invalid()), | |
283 "Improper constant pool long/double index %u in class file %s", | |
284 index, CHECK_(nullHandle)); | |
285 break; | |
286 case JVM_CONSTANT_NameAndType : { | |
287 if (!_need_verify) break; | |
288 int name_ref_index = cp->name_ref_index_at(index); | |
289 int signature_ref_index = cp->signature_ref_index_at(index); | |
290 check_property( | |
291 valid_cp_range(name_ref_index, length) && | |
292 cp->tag_at(name_ref_index).is_utf8(), | |
293 "Invalid constant pool index %u in class file %s", | |
294 name_ref_index, CHECK_(nullHandle)); | |
295 check_property( | |
296 valid_cp_range(signature_ref_index, length) && | |
297 cp->tag_at(signature_ref_index).is_utf8(), | |
298 "Invalid constant pool index %u in class file %s", | |
299 signature_ref_index, CHECK_(nullHandle)); | |
300 break; | |
301 } | |
302 case JVM_CONSTANT_Utf8 : | |
303 break; | |
304 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
305 case JVM_CONSTANT_UnresolvedClassInError: | |
306 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
307 break; | |
308 case JVM_CONSTANT_ClassIndex : | |
309 { | |
310 int class_index = cp->klass_index_at(index); | |
311 check_property( | |
312 valid_cp_range(class_index, length) && | |
313 cp->tag_at(class_index).is_utf8(), | |
314 "Invalid constant pool index %u in class file %s", | |
315 class_index, CHECK_(nullHandle)); | |
316 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
317 } | |
318 break; | |
319 case JVM_CONSTANT_UnresolvedString : | |
320 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
321 break; | |
322 case JVM_CONSTANT_StringIndex : | |
323 { | |
324 int string_index = cp->string_index_at(index); | |
325 check_property( | |
326 valid_cp_range(string_index, length) && | |
327 cp->tag_at(string_index).is_utf8(), | |
328 "Invalid constant pool index %u in class file %s", | |
329 string_index, CHECK_(nullHandle)); | |
330 symbolOop sym = cp->symbol_at(string_index); | |
331 cp->unresolved_string_at_put(index, sym); | |
332 } | |
333 break; | |
334 default: | |
335 fatal1("bad constant pool tag value %u", cp->tag_at(index).value()); | |
336 ShouldNotReachHere(); | |
337 break; | |
338 } // end of switch | |
339 } // end of for | |
340 | |
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341 if (_cp_patches != NULL) { |
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342 // need to treat this_class specially... |
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343 assert(AnonymousClasses, ""); |
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344 int this_class_index; |
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345 { |
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346 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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347 u1* mark = cfs->current(); |
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348 u2 flags = cfs->get_u2_fast(); |
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349 this_class_index = cfs->get_u2_fast(); |
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350 cfs->set_current(mark); // revert to mark |
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351 } |
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352 |
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353 for (index = 1; index < length; index++) { // Index 0 is unused |
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354 if (has_cp_patch_at(index)) { |
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355 guarantee_property(index != this_class_index, |
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356 "Illegal constant pool patch to self at %d in class file %s", |
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357 index, CHECK_(nullHandle)); |
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358 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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359 } |
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360 } |
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361 // Ensure that all the patches have been used. |
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362 for (index = 0; index < _cp_patches->length(); index++) { |
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363 guarantee_property(!has_cp_patch_at(index), |
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364 "Unused constant pool patch at %d in class file %s", |
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365 index, CHECK_(nullHandle)); |
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366 } |
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367 } |
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368 |
0 | 369 if (!_need_verify) { |
370 return cp; | |
371 } | |
372 | |
373 // second verification pass - checks the strings are of the right format. | |
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374 // but not yet to the other entries |
0 | 375 for (index = 1; index < length; index++) { |
376 jbyte tag = cp->tag_at(index).value(); | |
377 switch (tag) { | |
378 case JVM_CONSTANT_UnresolvedClass: { | |
379 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
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380 // check the name, even if _cp_patches will overwrite it |
0 | 381 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
382 break; | |
383 } | |
384 case JVM_CONSTANT_Fieldref: | |
385 case JVM_CONSTANT_Methodref: | |
386 case JVM_CONSTANT_InterfaceMethodref: { | |
387 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
388 // already verified to be utf8 | |
389 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
390 // already verified to be utf8 | |
391 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
392 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
393 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
394 if (tag == JVM_CONSTANT_Fieldref) { | |
395 verify_legal_field_name(name, CHECK_(nullHandle)); | |
396 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); | |
397 } else { | |
398 verify_legal_method_name(name, CHECK_(nullHandle)); | |
399 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
400 if (tag == JVM_CONSTANT_Methodref) { | |
401 // 4509014: If a class method name begins with '<', it must be "<init>". | |
402 assert(!name.is_null(), "method name in constant pool is null"); | |
403 unsigned int name_len = name->utf8_length(); | |
404 assert(name_len > 0, "bad method name"); // already verified as legal name | |
405 if (name->byte_at(0) == '<') { | |
406 if (name() != vmSymbols::object_initializer_name()) { | |
407 classfile_parse_error( | |
408 "Bad method name at constant pool index %u in class file %s", | |
409 name_ref_index, CHECK_(nullHandle)); | |
410 } | |
411 } | |
412 } | |
413 } | |
414 break; | |
415 } | |
416 } // end of switch | |
417 } // end of for | |
418 | |
419 return cp; | |
420 } | |
421 | |
422 | |
431
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423 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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424 assert(AnonymousClasses, ""); |
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425 BasicType patch_type = T_VOID; |
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426 switch (cp->tag_at(index).value()) { |
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427 |
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428 case JVM_CONSTANT_UnresolvedClass : |
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429 // Patching a class means pre-resolving it. |
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430 // The name in the constant pool is ignored. |
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431 if (patch->klass() == SystemDictionary::class_klass()) { // %%% java_lang_Class::is_instance |
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432 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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433 "Illegal class patch at %d in class file %s", |
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434 index, CHECK); |
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435 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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436 } else { |
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437 guarantee_property(java_lang_String::is_instance(patch()), |
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438 "Illegal class patch at %d in class file %s", |
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439 index, CHECK); |
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440 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK); |
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441 cp->unresolved_klass_at_put(index, name()); |
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442 } |
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443 break; |
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444 |
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445 case JVM_CONSTANT_UnresolvedString : |
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446 // Patching a string means pre-resolving it. |
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447 // The spelling in the constant pool is ignored. |
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448 // The constant reference may be any object whatever. |
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449 // If it is not a real interned string, the constant is referred |
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450 // to as a "pseudo-string", and must be presented to the CP |
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451 // explicitly, because it may require scavenging. |
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452 cp->pseudo_string_at_put(index, patch()); |
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453 break; |
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454 |
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455 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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456 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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457 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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458 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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459 patch_prim: |
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460 { |
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461 jvalue value; |
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462 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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463 guarantee_property(value_type == patch_type, |
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464 "Illegal primitive patch at %d in class file %s", |
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465 index, CHECK); |
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466 switch (value_type) { |
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467 case T_INT: cp->int_at_put(index, value.i); break; |
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468 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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469 case T_LONG: cp->long_at_put(index, value.j); break; |
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470 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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471 default: assert(false, ""); |
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472 } |
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473 } |
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474 break; |
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475 |
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476 default: |
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477 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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478 guarantee_property(!has_cp_patch_at(index), |
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479 "Illegal unexpected patch at %d in class file %s", |
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480 index, CHECK); |
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481 return; |
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482 } |
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483 |
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484 // On fall-through, mark the patch as used. |
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485 clear_cp_patch_at(index); |
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486 } |
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487 |
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488 |
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489 |
0 | 490 class NameSigHash: public ResourceObj { |
491 public: | |
492 symbolOop _name; // name | |
493 symbolOop _sig; // signature | |
494 NameSigHash* _next; // Next entry in hash table | |
495 }; | |
496 | |
497 | |
498 #define HASH_ROW_SIZE 256 | |
499 | |
500 unsigned int hash(symbolOop name, symbolOop sig) { | |
501 unsigned int raw_hash = 0; | |
502 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
503 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
504 | |
505 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
506 } | |
507 | |
508 | |
509 void initialize_hashtable(NameSigHash** table) { | |
510 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
511 } | |
512 | |
513 // Return false if the name/sig combination is found in table. | |
514 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
515 // The old format checker uses heap sort to find duplicates. | |
516 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
517 // of table since we don't expect symbolOop's to move. | |
518 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
519 assert(name != NULL, "name in constant pool is NULL"); | |
520 | |
521 // First lookup for duplicates | |
522 int index = hash(name, sig); | |
523 NameSigHash* entry = table[index]; | |
524 while (entry != NULL) { | |
525 if (entry->_name == name && entry->_sig == sig) { | |
526 return false; | |
527 } | |
528 entry = entry->_next; | |
529 } | |
530 | |
531 // No duplicate is found, allocate a new entry and fill it. | |
532 entry = new NameSigHash(); | |
533 entry->_name = name; | |
534 entry->_sig = sig; | |
535 | |
536 // Insert into hash table | |
537 entry->_next = table[index]; | |
538 table[index] = entry; | |
539 | |
540 return true; | |
541 } | |
542 | |
543 | |
544 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
545 int length, | |
546 Handle class_loader, | |
547 Handle protection_domain, | |
548 PerfTraceTime* vmtimer, | |
549 symbolHandle class_name, | |
550 TRAPS) { | |
551 ClassFileStream* cfs = stream(); | |
552 assert(length > 0, "only called for length>0"); | |
553 objArrayHandle nullHandle; | |
554 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
555 objArrayHandle interfaces (THREAD, interface_oop); | |
556 | |
557 int index; | |
558 for (index = 0; index < length; index++) { | |
559 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
431
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560 KlassHandle interf; |
0 | 561 check_property( |
562 valid_cp_range(interface_index, cp->length()) && | |
431
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563 is_klass_reference(cp, interface_index), |
0 | 564 "Interface name has bad constant pool index %u in class file %s", |
565 interface_index, CHECK_(nullHandle)); | |
431
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566 if (cp->tag_at(interface_index).is_klass()) { |
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567 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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568 } else { |
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569 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); |
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570 |
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571 // Don't need to check legal name because it's checked when parsing constant pool. |
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572 // But need to make sure it's not an array type. |
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573 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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574 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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575 |
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576 vmtimer->suspend(); // do not count recursive loading twice |
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577 // Call resolve_super so classcircularity is checked |
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578 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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579 unresolved_klass, class_loader, protection_domain, |
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580 false, CHECK_(nullHandle)); |
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581 interf = KlassHandle(THREAD, k); |
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582 vmtimer->resume(); |
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583 |
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584 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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585 } |
0 | 586 |
587 if (!Klass::cast(interf())->is_interface()) { | |
588 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
589 } | |
590 interfaces->obj_at_put(index, interf()); | |
591 } | |
592 | |
593 if (!_need_verify || length <= 1) { | |
594 return interfaces; | |
595 } | |
596 | |
597 // Check if there's any duplicates in interfaces | |
598 ResourceMark rm(THREAD); | |
599 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
600 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
601 initialize_hashtable(interface_names); | |
602 bool dup = false; | |
603 { | |
604 debug_only(No_Safepoint_Verifier nsv;) | |
605 for (index = 0; index < length; index++) { | |
606 klassOop k = (klassOop)interfaces->obj_at(index); | |
607 symbolOop name = instanceKlass::cast(k)->name(); | |
608 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
609 if (!put_after_lookup(name, NULL, interface_names)) { | |
610 dup = true; | |
611 break; | |
612 } | |
613 } | |
614 } | |
615 if (dup) { | |
616 classfile_parse_error("Duplicate interface name in class file %s", | |
617 CHECK_(nullHandle)); | |
618 } | |
619 | |
620 return interfaces; | |
621 } | |
622 | |
623 | |
624 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
625 // Make sure the constant pool entry is of a type appropriate to this field | |
626 guarantee_property( | |
627 (constantvalue_index > 0 && | |
628 constantvalue_index < cp->length()), | |
629 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
630 constantvalue_index, CHECK); | |
631 constantTag value_type = cp->tag_at(constantvalue_index); | |
632 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
633 case T_LONG: | |
634 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
635 break; | |
636 case T_FLOAT: | |
637 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
638 break; | |
639 case T_DOUBLE: | |
640 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
641 break; | |
642 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
643 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
644 break; | |
645 case T_OBJECT: | |
646 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18) | |
647 && (value_type.is_string() || value_type.is_unresolved_string())), | |
648 "Bad string initial value in class file %s", CHECK); | |
649 break; | |
650 default: | |
651 classfile_parse_error( | |
652 "Unable to set initial value %u in class file %s", | |
653 constantvalue_index, CHECK); | |
654 } | |
655 } | |
656 | |
657 | |
658 // Parse attributes for a field. | |
659 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
660 u2 attributes_count, | |
661 bool is_static, u2 signature_index, | |
662 u2* constantvalue_index_addr, | |
663 bool* is_synthetic_addr, | |
664 u2* generic_signature_index_addr, | |
665 typeArrayHandle* field_annotations, | |
666 TRAPS) { | |
667 ClassFileStream* cfs = stream(); | |
668 assert(attributes_count > 0, "length should be greater than 0"); | |
669 u2 constantvalue_index = 0; | |
670 u2 generic_signature_index = 0; | |
671 bool is_synthetic = false; | |
672 u1* runtime_visible_annotations = NULL; | |
673 int runtime_visible_annotations_length = 0; | |
674 u1* runtime_invisible_annotations = NULL; | |
675 int runtime_invisible_annotations_length = 0; | |
676 while (attributes_count--) { | |
677 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
678 u2 attribute_name_index = cfs->get_u2_fast(); | |
679 u4 attribute_length = cfs->get_u4_fast(); | |
680 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
681 cp->tag_at(attribute_name_index).is_utf8(), | |
682 "Invalid field attribute index %u in class file %s", | |
683 attribute_name_index, | |
684 CHECK); | |
685 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
686 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
687 // ignore if non-static | |
688 if (constantvalue_index != 0) { | |
689 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
690 } | |
691 check_property( | |
692 attribute_length == 2, | |
693 "Invalid ConstantValue field attribute length %u in class file %s", | |
694 attribute_length, CHECK); | |
695 constantvalue_index = cfs->get_u2(CHECK); | |
696 if (_need_verify) { | |
697 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
698 } | |
699 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
700 if (attribute_length != 0) { | |
701 classfile_parse_error( | |
702 "Invalid Synthetic field attribute length %u in class file %s", | |
703 attribute_length, CHECK); | |
704 } | |
705 is_synthetic = true; | |
706 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
707 if (attribute_length != 0) { | |
708 classfile_parse_error( | |
709 "Invalid Deprecated field attribute length %u in class file %s", | |
710 attribute_length, CHECK); | |
711 } | |
712 } else if (_major_version >= JAVA_1_5_VERSION) { | |
713 if (attribute_name == vmSymbols::tag_signature()) { | |
714 if (attribute_length != 2) { | |
715 classfile_parse_error( | |
716 "Wrong size %u for field's Signature attribute in class file %s", | |
717 attribute_length, CHECK); | |
718 } | |
719 generic_signature_index = cfs->get_u2(CHECK); | |
720 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
721 runtime_visible_annotations_length = attribute_length; | |
722 runtime_visible_annotations = cfs->get_u1_buffer(); | |
723 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
724 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
725 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
726 runtime_invisible_annotations_length = attribute_length; | |
727 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
728 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
729 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
730 } else { | |
731 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
732 } | |
733 } else { | |
734 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
735 } | |
736 } | |
737 | |
738 *constantvalue_index_addr = constantvalue_index; | |
739 *is_synthetic_addr = is_synthetic; | |
740 *generic_signature_index_addr = generic_signature_index; | |
741 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
742 runtime_visible_annotations_length, | |
743 runtime_invisible_annotations, | |
744 runtime_invisible_annotations_length, | |
745 CHECK); | |
746 return; | |
747 } | |
748 | |
749 | |
750 // Field allocation types. Used for computing field offsets. | |
751 | |
752 enum FieldAllocationType { | |
753 STATIC_OOP, // Oops | |
754 STATIC_BYTE, // Boolean, Byte, char | |
755 STATIC_SHORT, // shorts | |
756 STATIC_WORD, // ints | |
757 STATIC_DOUBLE, // long or double | |
758 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
759 NONSTATIC_OOP, | |
760 NONSTATIC_BYTE, | |
761 NONSTATIC_SHORT, | |
762 NONSTATIC_WORD, | |
763 NONSTATIC_DOUBLE, | |
764 NONSTATIC_ALIGNED_DOUBLE | |
765 }; | |
766 | |
767 | |
768 struct FieldAllocationCount { | |
769 int static_oop_count; | |
770 int static_byte_count; | |
771 int static_short_count; | |
772 int static_word_count; | |
773 int static_double_count; | |
774 int nonstatic_oop_count; | |
775 int nonstatic_byte_count; | |
776 int nonstatic_short_count; | |
777 int nonstatic_word_count; | |
778 int nonstatic_double_count; | |
779 }; | |
780 | |
781 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
782 struct FieldAllocationCount *fac, | |
783 objArrayHandle* fields_annotations, TRAPS) { | |
784 ClassFileStream* cfs = stream(); | |
785 typeArrayHandle nullHandle; | |
786 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
787 u2 length = cfs->get_u2_fast(); | |
788 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
789 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
790 typeArrayHandle fields(THREAD, new_fields); | |
791 | |
792 int index = 0; | |
793 typeArrayHandle field_annotations; | |
794 for (int n = 0; n < length; n++) { | |
795 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
796 | |
797 AccessFlags access_flags; | |
798 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
799 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
800 access_flags.set_flags(flags); | |
801 | |
802 u2 name_index = cfs->get_u2_fast(); | |
803 int cp_size = cp->length(); | |
804 check_property( | |
805 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
806 "Invalid constant pool index %u for field name in class file %s", | |
807 name_index, CHECK_(nullHandle)); | |
808 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
809 verify_legal_field_name(name, CHECK_(nullHandle)); | |
810 | |
811 u2 signature_index = cfs->get_u2_fast(); | |
812 check_property( | |
813 valid_cp_range(signature_index, cp_size) && | |
814 cp->tag_at(signature_index).is_utf8(), | |
815 "Invalid constant pool index %u for field signature in class file %s", | |
816 signature_index, CHECK_(nullHandle)); | |
817 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
818 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
819 | |
820 u2 constantvalue_index = 0; | |
821 bool is_synthetic = false; | |
822 u2 generic_signature_index = 0; | |
823 bool is_static = access_flags.is_static(); | |
824 | |
825 u2 attributes_count = cfs->get_u2_fast(); | |
826 if (attributes_count > 0) { | |
827 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
828 &constantvalue_index, &is_synthetic, | |
829 &generic_signature_index, &field_annotations, | |
830 CHECK_(nullHandle)); | |
831 if (field_annotations.not_null()) { | |
832 if (fields_annotations->is_null()) { | |
833 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
834 *fields_annotations = objArrayHandle(THREAD, md); | |
835 } | |
836 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
837 } | |
838 if (is_synthetic) { | |
839 access_flags.set_is_synthetic(); | |
840 } | |
841 } | |
842 | |
843 fields->short_at_put(index++, access_flags.as_short()); | |
844 fields->short_at_put(index++, name_index); | |
845 fields->short_at_put(index++, signature_index); | |
846 fields->short_at_put(index++, constantvalue_index); | |
847 | |
848 // Remember how many oops we encountered and compute allocation type | |
849 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
850 FieldAllocationType atype; | |
851 if ( is_static ) { | |
852 switch ( type ) { | |
853 case T_BOOLEAN: | |
854 case T_BYTE: | |
855 fac->static_byte_count++; | |
856 atype = STATIC_BYTE; | |
857 break; | |
858 case T_LONG: | |
859 case T_DOUBLE: | |
860 if (Universe::field_type_should_be_aligned(type)) { | |
861 atype = STATIC_ALIGNED_DOUBLE; | |
862 } else { | |
863 atype = STATIC_DOUBLE; | |
864 } | |
865 fac->static_double_count++; | |
866 break; | |
867 case T_CHAR: | |
868 case T_SHORT: | |
869 fac->static_short_count++; | |
870 atype = STATIC_SHORT; | |
871 break; | |
872 case T_FLOAT: | |
873 case T_INT: | |
874 fac->static_word_count++; | |
875 atype = STATIC_WORD; | |
876 break; | |
877 case T_ARRAY: | |
878 case T_OBJECT: | |
879 fac->static_oop_count++; | |
880 atype = STATIC_OOP; | |
881 break; | |
882 case T_ADDRESS: | |
883 case T_VOID: | |
884 default: | |
885 assert(0, "bad field type"); | |
886 } | |
887 } else { | |
888 switch ( type ) { | |
889 case T_BOOLEAN: | |
890 case T_BYTE: | |
891 fac->nonstatic_byte_count++; | |
892 atype = NONSTATIC_BYTE; | |
893 break; | |
894 case T_LONG: | |
895 case T_DOUBLE: | |
896 if (Universe::field_type_should_be_aligned(type)) { | |
897 atype = NONSTATIC_ALIGNED_DOUBLE; | |
898 } else { | |
899 atype = NONSTATIC_DOUBLE; | |
900 } | |
901 fac->nonstatic_double_count++; | |
902 break; | |
903 case T_CHAR: | |
904 case T_SHORT: | |
905 fac->nonstatic_short_count++; | |
906 atype = NONSTATIC_SHORT; | |
907 break; | |
908 case T_FLOAT: | |
909 case T_INT: | |
910 fac->nonstatic_word_count++; | |
911 atype = NONSTATIC_WORD; | |
912 break; | |
913 case T_ARRAY: | |
914 case T_OBJECT: | |
915 fac->nonstatic_oop_count++; | |
916 atype = NONSTATIC_OOP; | |
917 break; | |
918 case T_ADDRESS: | |
919 case T_VOID: | |
920 default: | |
921 assert(0, "bad field type"); | |
922 } | |
923 } | |
924 | |
925 // The correct offset is computed later (all oop fields will be located together) | |
926 // We temporarily store the allocation type in the offset field | |
927 fields->short_at_put(index++, atype); | |
928 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
929 fields->short_at_put(index++, generic_signature_index); | |
930 } | |
931 | |
932 if (_need_verify && length > 1) { | |
933 // Check duplicated fields | |
934 ResourceMark rm(THREAD); | |
935 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
936 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
937 initialize_hashtable(names_and_sigs); | |
938 bool dup = false; | |
939 { | |
940 debug_only(No_Safepoint_Verifier nsv;) | |
941 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
942 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
943 symbolOop name = cp->symbol_at(name_index); | |
944 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
945 symbolOop sig = cp->symbol_at(sig_index); | |
946 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
947 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
948 dup = true; | |
949 break; | |
950 } | |
951 } | |
952 } | |
953 if (dup) { | |
954 classfile_parse_error("Duplicate field name&signature in class file %s", | |
955 CHECK_(nullHandle)); | |
956 } | |
957 } | |
958 | |
959 return fields; | |
960 } | |
961 | |
962 | |
963 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
964 while (length-- > 0) { | |
965 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
966 } | |
967 } | |
968 | |
969 | |
970 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
971 u4 exception_table_length, | |
972 constantPoolHandle cp, | |
973 TRAPS) { | |
974 ClassFileStream* cfs = stream(); | |
975 typeArrayHandle nullHandle; | |
976 | |
977 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
978 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
979 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
980 | |
981 int index = 0; | |
982 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
983 for (unsigned int i = 0; i < exception_table_length; i++) { | |
984 u2 start_pc = cfs->get_u2_fast(); | |
985 u2 end_pc = cfs->get_u2_fast(); | |
986 u2 handler_pc = cfs->get_u2_fast(); | |
987 u2 catch_type_index = cfs->get_u2_fast(); | |
988 // Will check legal target after parsing code array in verifier. | |
989 if (_need_verify) { | |
990 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
991 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
992 guarantee_property(handler_pc < code_length, | |
993 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
994 if (catch_type_index != 0) { | |
995 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
431
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changeset
|
996 is_klass_reference(cp, catch_type_index), |
0 | 997 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
998 } | |
999 } | |
1000 exception_handlers->int_at_put(index++, start_pc); | |
1001 exception_handlers->int_at_put(index++, end_pc); | |
1002 exception_handlers->int_at_put(index++, handler_pc); | |
1003 exception_handlers->int_at_put(index++, catch_type_index); | |
1004 } | |
1005 return exception_handlers; | |
1006 } | |
1007 | |
1008 void ClassFileParser::parse_linenumber_table( | |
1009 u4 code_attribute_length, u4 code_length, | |
1010 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
1011 ClassFileStream* cfs = stream(); | |
1012 unsigned int num_entries = cfs->get_u2(CHECK); | |
1013 | |
1014 // Each entry is a u2 start_pc, and a u2 line_number | |
1015 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
1016 | |
1017 // Verify line number attribute and table length | |
1018 check_property( | |
1019 code_attribute_length == sizeof(u2) + length_in_bytes, | |
1020 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
1021 | |
1022 cfs->guarantee_more(length_in_bytes, CHECK); | |
1023 | |
1024 if ((*write_stream) == NULL) { | |
1025 if (length_in_bytes > fixed_buffer_size) { | |
1026 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
1027 } else { | |
1028 (*write_stream) = new CompressedLineNumberWriteStream( | |
1029 linenumbertable_buffer, fixed_buffer_size); | |
1030 } | |
1031 } | |
1032 | |
1033 while (num_entries-- > 0) { | |
1034 u2 bci = cfs->get_u2_fast(); // start_pc | |
1035 u2 line = cfs->get_u2_fast(); // line_number | |
1036 guarantee_property(bci < code_length, | |
1037 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
1038 (*write_stream)->write_pair(bci, line); | |
1039 } | |
1040 } | |
1041 | |
1042 | |
1043 // Class file LocalVariableTable elements. | |
1044 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
1045 public: | |
1046 u2 start_bci; | |
1047 u2 length; | |
1048 u2 name_cp_index; | |
1049 u2 descriptor_cp_index; | |
1050 u2 slot; | |
1051 }; | |
1052 | |
1053 | |
1054 class LVT_Hash: public CHeapObj { | |
1055 public: | |
1056 LocalVariableTableElement *_elem; // element | |
1057 LVT_Hash* _next; // Next entry in hash table | |
1058 }; | |
1059 | |
1060 unsigned int hash(LocalVariableTableElement *elem) { | |
1061 unsigned int raw_hash = elem->start_bci; | |
1062 | |
1063 raw_hash = elem->length + raw_hash * 37; | |
1064 raw_hash = elem->name_cp_index + raw_hash * 37; | |
1065 raw_hash = elem->slot + raw_hash * 37; | |
1066 | |
1067 return raw_hash % HASH_ROW_SIZE; | |
1068 } | |
1069 | |
1070 void initialize_hashtable(LVT_Hash** table) { | |
1071 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1072 table[i] = NULL; | |
1073 } | |
1074 } | |
1075 | |
1076 void clear_hashtable(LVT_Hash** table) { | |
1077 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1078 LVT_Hash* current = table[i]; | |
1079 LVT_Hash* next; | |
1080 while (current != NULL) { | |
1081 next = current->_next; | |
1082 current->_next = NULL; | |
1083 delete(current); | |
1084 current = next; | |
1085 } | |
1086 table[i] = NULL; | |
1087 } | |
1088 } | |
1089 | |
1090 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
1091 LVT_Hash* entry = table[index]; | |
1092 | |
1093 /* | |
1094 * 3-tuple start_bci/length/slot has to be unique key, | |
1095 * so the following comparison seems to be redundant: | |
1096 * && elem->name_cp_index == entry->_elem->name_cp_index | |
1097 */ | |
1098 while (entry != NULL) { | |
1099 if (elem->start_bci == entry->_elem->start_bci | |
1100 && elem->length == entry->_elem->length | |
1101 && elem->name_cp_index == entry->_elem->name_cp_index | |
1102 && elem->slot == entry->_elem->slot | |
1103 ) { | |
1104 return entry; | |
1105 } | |
1106 entry = entry->_next; | |
1107 } | |
1108 return NULL; | |
1109 } | |
1110 | |
1111 // Return false if the local variable is found in table. | |
1112 // Return true if no duplicate is found. | |
1113 // And local variable is added as a new entry in table. | |
1114 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
1115 // First lookup for duplicates | |
1116 int index = hash(elem); | |
1117 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
1118 | |
1119 if (entry != NULL) { | |
1120 return false; | |
1121 } | |
1122 // No duplicate is found, allocate a new entry and fill it. | |
1123 if ((entry = new LVT_Hash()) == NULL) { | |
1124 return false; | |
1125 } | |
1126 entry->_elem = elem; | |
1127 | |
1128 // Insert into hash table | |
1129 entry->_next = table[index]; | |
1130 table[index] = entry; | |
1131 | |
1132 return true; | |
1133 } | |
1134 | |
1135 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
1136 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
1137 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
1138 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
1139 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
1140 lvt->signature_cp_index = 0; | |
1141 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
1142 } | |
1143 | |
1144 // Function is used to parse both attributes: | |
1145 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
1146 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
1147 u2 max_locals, | |
1148 u4 code_attribute_length, | |
1149 constantPoolHandle cp, | |
1150 u2* localvariable_table_length, | |
1151 bool isLVTT, | |
1152 TRAPS) { | |
1153 ClassFileStream* cfs = stream(); | |
1154 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
1155 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
1156 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
1157 // Verify local variable table attribute has right length | |
1158 if (_need_verify) { | |
1159 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
1160 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
1161 } | |
1162 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
1163 assert(localvariable_table_start != NULL, "null local variable table"); | |
1164 if (!_need_verify) { | |
1165 cfs->skip_u2_fast(size); | |
1166 } else { | |
1167 cfs->guarantee_more(size * 2, CHECK_NULL); | |
1168 for(int i = 0; i < (*localvariable_table_length); i++) { | |
1169 u2 start_pc = cfs->get_u2_fast(); | |
1170 u2 length = cfs->get_u2_fast(); | |
1171 u2 name_index = cfs->get_u2_fast(); | |
1172 u2 descriptor_index = cfs->get_u2_fast(); | |
1173 u2 index = cfs->get_u2_fast(); | |
1174 // Assign to a u4 to avoid overflow | |
1175 u4 end_pc = (u4)start_pc + (u4)length; | |
1176 | |
1177 if (start_pc >= code_length) { | |
1178 classfile_parse_error( | |
1179 "Invalid start_pc %u in %s in class file %s", | |
1180 start_pc, tbl_name, CHECK_NULL); | |
1181 } | |
1182 if (end_pc > code_length) { | |
1183 classfile_parse_error( | |
1184 "Invalid length %u in %s in class file %s", | |
1185 length, tbl_name, CHECK_NULL); | |
1186 } | |
1187 int cp_size = cp->length(); | |
1188 guarantee_property( | |
1189 valid_cp_range(name_index, cp_size) && | |
1190 cp->tag_at(name_index).is_utf8(), | |
1191 "Name index %u in %s has bad constant type in class file %s", | |
1192 name_index, tbl_name, CHECK_NULL); | |
1193 guarantee_property( | |
1194 valid_cp_range(descriptor_index, cp_size) && | |
1195 cp->tag_at(descriptor_index).is_utf8(), | |
1196 "Signature index %u in %s has bad constant type in class file %s", | |
1197 descriptor_index, tbl_name, CHECK_NULL); | |
1198 | |
1199 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1200 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
1201 verify_legal_field_name(name, CHECK_NULL); | |
1202 u2 extra_slot = 0; | |
1203 if (!isLVTT) { | |
1204 verify_legal_field_signature(name, sig, CHECK_NULL); | |
1205 | |
1206 // 4894874: check special cases for double and long local variables | |
1207 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
1208 sig() == vmSymbols::type_signature(T_LONG)) { | |
1209 extra_slot = 1; | |
1210 } | |
1211 } | |
1212 guarantee_property((index + extra_slot) < max_locals, | |
1213 "Invalid index %u in %s in class file %s", | |
1214 index, tbl_name, CHECK_NULL); | |
1215 } | |
1216 } | |
1217 return localvariable_table_start; | |
1218 } | |
1219 | |
1220 | |
1221 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
1222 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
1223 ClassFileStream* cfs = stream(); | |
1224 u2 index = 0; // index in the array with long/double occupying two slots | |
1225 u4 i1 = *u1_index; | |
1226 u4 i2 = *u2_index + 1; | |
1227 for(int i = 0; i < array_length; i++) { | |
1228 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
1229 index++; | |
1230 if (tag == ITEM_Long || tag == ITEM_Double) { | |
1231 index++; | |
1232 } else if (tag == ITEM_Object) { | |
1233 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
1234 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
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1235 is_klass_reference(cp, class_index), |
0 | 1236 "Bad class index %u in StackMap in class file %s", |
1237 class_index, CHECK); | |
1238 } else if (tag == ITEM_Uninitialized) { | |
1239 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
1240 guarantee_property( | |
1241 offset < code_length, | |
1242 "Bad uninitialized type offset %u in StackMap in class file %s", | |
1243 offset, CHECK); | |
1244 } else { | |
1245 guarantee_property( | |
1246 tag <= (u1)ITEM_Uninitialized, | |
1247 "Unknown variable type %u in StackMap in class file %s", | |
1248 tag, CHECK); | |
1249 } | |
1250 } | |
1251 u2_array[*u2_index] = index; | |
1252 *u1_index = i1; | |
1253 *u2_index = i2; | |
1254 } | |
1255 | |
1256 typeArrayOop ClassFileParser::parse_stackmap_table( | |
1257 u4 code_attribute_length, TRAPS) { | |
1258 if (code_attribute_length == 0) | |
1259 return NULL; | |
1260 | |
1261 ClassFileStream* cfs = stream(); | |
1262 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
1263 assert(stackmap_table_start != NULL, "null stackmap table"); | |
1264 | |
1265 // check code_attribute_length first | |
1266 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
1267 | |
1268 if (!_need_verify && !DumpSharedSpaces) { | |
1269 return NULL; | |
1270 } | |
1271 | |
1272 typeArrayOop stackmap_data = | |
1273 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
1274 | |
1275 stackmap_data->set_length(code_attribute_length); | |
1276 memcpy((void*)stackmap_data->byte_at_addr(0), | |
1277 (void*)stackmap_table_start, code_attribute_length); | |
1278 return stackmap_data; | |
1279 } | |
1280 | |
1281 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
1282 u4 method_attribute_length, | |
1283 constantPoolHandle cp, TRAPS) { | |
1284 ClassFileStream* cfs = stream(); | |
1285 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
1286 *checked_exceptions_length = cfs->get_u2_fast(); | |
1287 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1288 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
1289 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
1290 if (!_need_verify) { | |
1291 cfs->skip_u2_fast(size); | |
1292 } else { | |
1293 // Verify each value in the checked exception table | |
1294 u2 checked_exception; | |
1295 u2 len = *checked_exceptions_length; | |
1296 cfs->guarantee_more(2 * len, CHECK_NULL); | |
1297 for (int i = 0; i < len; i++) { | |
1298 checked_exception = cfs->get_u2_fast(); | |
1299 check_property( | |
1300 valid_cp_range(checked_exception, cp->length()) && | |
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1301 is_klass_reference(cp, checked_exception), |
0 | 1302 "Exception name has bad type at constant pool %u in class file %s", |
1303 checked_exception, CHECK_NULL); | |
1304 } | |
1305 } | |
1306 // check exceptions attribute length | |
1307 if (_need_verify) { | |
1308 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
1309 sizeof(u2) * size), | |
1310 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
1311 } | |
1312 return checked_exceptions_start; | |
1313 } | |
1314 | |
1315 | |
1316 #define MAX_ARGS_SIZE 255 | |
1317 #define MAX_CODE_SIZE 65535 | |
1318 #define INITIAL_MAX_LVT_NUMBER 256 | |
1319 | |
1320 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
1321 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
1322 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
1323 // entire method attribute is parsed. | |
1324 // | |
1325 // The promoted_flags parameter is used to pass relevant access_flags | |
1326 // from the method back up to the containing klass. These flag values | |
1327 // are added to klass's access_flags. | |
1328 | |
1329 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
1330 AccessFlags *promoted_flags, | |
1331 typeArrayHandle* method_annotations, | |
1332 typeArrayHandle* method_parameter_annotations, | |
1333 typeArrayHandle* method_default_annotations, | |
1334 TRAPS) { | |
1335 ClassFileStream* cfs = stream(); | |
1336 methodHandle nullHandle; | |
1337 ResourceMark rm(THREAD); | |
1338 // Parse fixed parts | |
1339 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
1340 | |
1341 int flags = cfs->get_u2_fast(); | |
1342 u2 name_index = cfs->get_u2_fast(); | |
1343 int cp_size = cp->length(); | |
1344 check_property( | |
1345 valid_cp_range(name_index, cp_size) && | |
1346 cp->tag_at(name_index).is_utf8(), | |
1347 "Illegal constant pool index %u for method name in class file %s", | |
1348 name_index, CHECK_(nullHandle)); | |
1349 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1350 verify_legal_method_name(name, CHECK_(nullHandle)); | |
1351 | |
1352 u2 signature_index = cfs->get_u2_fast(); | |
1353 guarantee_property( | |
1354 valid_cp_range(signature_index, cp_size) && | |
1355 cp->tag_at(signature_index).is_utf8(), | |
1356 "Illegal constant pool index %u for method signature in class file %s", | |
1357 signature_index, CHECK_(nullHandle)); | |
1358 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
1359 | |
1360 AccessFlags access_flags; | |
1361 if (name == vmSymbols::class_initializer_name()) { | |
1362 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
1363 flags = JVM_ACC_STATIC; | |
1364 } else { | |
1365 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
1366 } | |
1367 | |
1368 int args_size = -1; // only used when _need_verify is true | |
1369 if (_need_verify) { | |
1370 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
1371 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
1372 if (args_size > MAX_ARGS_SIZE) { | |
1373 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
1374 } | |
1375 } | |
1376 | |
1377 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
1378 | |
1379 // Default values for code and exceptions attribute elements | |
1380 u2 max_stack = 0; | |
1381 u2 max_locals = 0; | |
1382 u4 code_length = 0; | |
1383 u1* code_start = 0; | |
1384 u2 exception_table_length = 0; | |
1385 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
1386 u2 checked_exceptions_length = 0; | |
1387 u2* checked_exceptions_start = NULL; | |
1388 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
1389 int linenumber_table_length = 0; | |
1390 int total_lvt_length = 0; | |
1391 u2 lvt_cnt = 0; | |
1392 u2 lvtt_cnt = 0; | |
1393 bool lvt_allocated = false; | |
1394 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1395 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1396 u2* localvariable_table_length; | |
1397 u2** localvariable_table_start; | |
1398 u2* localvariable_type_table_length; | |
1399 u2** localvariable_type_table_start; | |
1400 bool parsed_code_attribute = false; | |
1401 bool parsed_checked_exceptions_attribute = false; | |
1402 bool parsed_stackmap_attribute = false; | |
1403 // stackmap attribute - JDK1.5 | |
1404 typeArrayHandle stackmap_data; | |
1405 u2 generic_signature_index = 0; | |
1406 u1* runtime_visible_annotations = NULL; | |
1407 int runtime_visible_annotations_length = 0; | |
1408 u1* runtime_invisible_annotations = NULL; | |
1409 int runtime_invisible_annotations_length = 0; | |
1410 u1* runtime_visible_parameter_annotations = NULL; | |
1411 int runtime_visible_parameter_annotations_length = 0; | |
1412 u1* runtime_invisible_parameter_annotations = NULL; | |
1413 int runtime_invisible_parameter_annotations_length = 0; | |
1414 u1* annotation_default = NULL; | |
1415 int annotation_default_length = 0; | |
1416 | |
1417 // Parse code and exceptions attribute | |
1418 u2 method_attributes_count = cfs->get_u2_fast(); | |
1419 while (method_attributes_count--) { | |
1420 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
1421 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
1422 u4 method_attribute_length = cfs->get_u4_fast(); | |
1423 check_property( | |
1424 valid_cp_range(method_attribute_name_index, cp_size) && | |
1425 cp->tag_at(method_attribute_name_index).is_utf8(), | |
1426 "Invalid method attribute name index %u in class file %s", | |
1427 method_attribute_name_index, CHECK_(nullHandle)); | |
1428 | |
1429 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
1430 if (method_attribute_name == vmSymbols::tag_code()) { | |
1431 // Parse Code attribute | |
1432 if (_need_verify) { | |
1433 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
1434 "Code attribute in native or abstract methods in class file %s", | |
1435 CHECK_(nullHandle)); | |
1436 } | |
1437 if (parsed_code_attribute) { | |
1438 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
1439 } | |
1440 parsed_code_attribute = true; | |
1441 | |
1442 // Stack size, locals size, and code size | |
1443 if (_major_version == 45 && _minor_version <= 2) { | |
1444 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
1445 max_stack = cfs->get_u1_fast(); | |
1446 max_locals = cfs->get_u1_fast(); | |
1447 code_length = cfs->get_u2_fast(); | |
1448 } else { | |
1449 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
1450 max_stack = cfs->get_u2_fast(); | |
1451 max_locals = cfs->get_u2_fast(); | |
1452 code_length = cfs->get_u4_fast(); | |
1453 } | |
1454 if (_need_verify) { | |
1455 guarantee_property(args_size <= max_locals, | |
1456 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
1457 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
1458 "Invalid method Code length %u in class file %s", | |
1459 code_length, CHECK_(nullHandle)); | |
1460 } | |
1461 // Code pointer | |
1462 code_start = cfs->get_u1_buffer(); | |
1463 assert(code_start != NULL, "null code start"); | |
1464 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
1465 cfs->skip_u1_fast(code_length); | |
1466 | |
1467 // Exception handler table | |
1468 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
1469 exception_table_length = cfs->get_u2_fast(); | |
1470 if (exception_table_length > 0) { | |
1471 exception_handlers = | |
1472 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
1473 } | |
1474 | |
1475 // Parse additional attributes in code attribute | |
1476 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
1477 u2 code_attributes_count = cfs->get_u2_fast(); | |
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1478 |
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1479 unsigned int calculated_attribute_length = 0; |
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1480 |
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1481 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1482 calculated_attribute_length = |
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1483 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1484 } else { |
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1485 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1486 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1487 } |
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1488 calculated_attribute_length += |
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1489 code_length + |
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1490 sizeof(exception_table_length) + |
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1491 sizeof(code_attributes_count) + |
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1492 exception_table_length * |
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1493 ( sizeof(u2) + // start_pc |
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1494 sizeof(u2) + // end_pc |
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1495 sizeof(u2) + // handler_pc |
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1496 sizeof(u2) ); // catch_type_index |
0 | 1497 |
1498 while (code_attributes_count--) { | |
1499 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
1500 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
1501 u4 code_attribute_length = cfs->get_u4_fast(); | |
1502 calculated_attribute_length += code_attribute_length + | |
1503 sizeof(code_attribute_name_index) + | |
1504 sizeof(code_attribute_length); | |
1505 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
1506 cp->tag_at(code_attribute_name_index).is_utf8(), | |
1507 "Invalid code attribute name index %u in class file %s", | |
1508 code_attribute_name_index, | |
1509 CHECK_(nullHandle)); | |
1510 if (LoadLineNumberTables && | |
1511 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
1512 // Parse and compress line number table | |
1513 parse_linenumber_table(code_attribute_length, code_length, | |
1514 &linenumber_table, CHECK_(nullHandle)); | |
1515 | |
1516 } else if (LoadLocalVariableTables && | |
1517 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
1518 // Parse local variable table | |
1519 if (!lvt_allocated) { | |
1520 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1521 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1522 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1523 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1524 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1525 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1526 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1527 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1528 lvt_allocated = true; | |
1529 } | |
1530 if (lvt_cnt == max_lvt_cnt) { | |
1531 max_lvt_cnt <<= 1; | |
1532 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
1533 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
1534 } | |
1535 localvariable_table_start[lvt_cnt] = | |
1536 parse_localvariable_table(code_length, | |
1537 max_locals, | |
1538 code_attribute_length, | |
1539 cp, | |
1540 &localvariable_table_length[lvt_cnt], | |
1541 false, // is not LVTT | |
1542 CHECK_(nullHandle)); | |
1543 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
1544 lvt_cnt++; | |
1545 } else if (LoadLocalVariableTypeTables && | |
1546 _major_version >= JAVA_1_5_VERSION && | |
1547 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
1548 if (!lvt_allocated) { | |
1549 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1550 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1551 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1552 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1553 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1554 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1555 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1556 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1557 lvt_allocated = true; | |
1558 } | |
1559 // Parse local variable type table | |
1560 if (lvtt_cnt == max_lvtt_cnt) { | |
1561 max_lvtt_cnt <<= 1; | |
1562 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
1563 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
1564 } | |
1565 localvariable_type_table_start[lvtt_cnt] = | |
1566 parse_localvariable_table(code_length, | |
1567 max_locals, | |
1568 code_attribute_length, | |
1569 cp, | |
1570 &localvariable_type_table_length[lvtt_cnt], | |
1571 true, // is LVTT | |
1572 CHECK_(nullHandle)); | |
1573 lvtt_cnt++; | |
1574 } else if (UseSplitVerifier && | |
1575 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
1576 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
1577 // Stack map is only needed by the new verifier in JDK1.5. | |
1578 if (parsed_stackmap_attribute) { | |
1579 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
1580 } | |
1581 typeArrayOop sm = | |
1582 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
1583 stackmap_data = typeArrayHandle(THREAD, sm); | |
1584 parsed_stackmap_attribute = true; | |
1585 } else { | |
1586 // Skip unknown attributes | |
1587 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
1588 } | |
1589 } | |
1590 // check method attribute length | |
1591 if (_need_verify) { | |
1592 guarantee_property(method_attribute_length == calculated_attribute_length, | |
1593 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
1594 } | |
1595 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
1596 // Parse Exceptions attribute | |
1597 if (parsed_checked_exceptions_attribute) { | |
1598 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
1599 } | |
1600 parsed_checked_exceptions_attribute = true; | |
1601 checked_exceptions_start = | |
1602 parse_checked_exceptions(&checked_exceptions_length, | |
1603 method_attribute_length, | |
1604 cp, CHECK_(nullHandle)); | |
1605 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
1606 if (method_attribute_length != 0) { | |
1607 classfile_parse_error( | |
1608 "Invalid Synthetic method attribute length %u in class file %s", | |
1609 method_attribute_length, CHECK_(nullHandle)); | |
1610 } | |
1611 // Should we check that there hasn't already been a synthetic attribute? | |
1612 access_flags.set_is_synthetic(); | |
1613 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
1614 if (method_attribute_length != 0) { | |
1615 classfile_parse_error( | |
1616 "Invalid Deprecated method attribute length %u in class file %s", | |
1617 method_attribute_length, CHECK_(nullHandle)); | |
1618 } | |
1619 } else if (_major_version >= JAVA_1_5_VERSION) { | |
1620 if (method_attribute_name == vmSymbols::tag_signature()) { | |
1621 if (method_attribute_length != 2) { | |
1622 classfile_parse_error( | |
1623 "Invalid Signature attribute length %u in class file %s", | |
1624 method_attribute_length, CHECK_(nullHandle)); | |
1625 } | |
1626 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
1627 generic_signature_index = cfs->get_u2_fast(); | |
1628 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
1629 runtime_visible_annotations_length = method_attribute_length; | |
1630 runtime_visible_annotations = cfs->get_u1_buffer(); | |
1631 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
1632 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
1633 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
1634 runtime_invisible_annotations_length = method_attribute_length; | |
1635 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
1636 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
1637 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
1638 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
1639 runtime_visible_parameter_annotations_length = method_attribute_length; | |
1640 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
1641 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
1642 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
1643 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
1644 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
1645 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
1646 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
1647 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
1648 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
1649 annotation_default_length = method_attribute_length; | |
1650 annotation_default = cfs->get_u1_buffer(); | |
1651 assert(annotation_default != NULL, "null annotation default"); | |
1652 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
1653 } else { | |
1654 // Skip unknown attributes | |
1655 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1656 } | |
1657 } else { | |
1658 // Skip unknown attributes | |
1659 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1660 } | |
1661 } | |
1662 | |
1663 if (linenumber_table != NULL) { | |
1664 linenumber_table->write_terminator(); | |
1665 linenumber_table_length = linenumber_table->position(); | |
1666 } | |
1667 | |
1668 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
1669 if (_need_verify) { | |
1670 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
1671 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
1672 } | |
1673 | |
1674 // All sizing information for a methodOop is finally available, now create it | |
1675 methodOop m_oop = oopFactory::new_method( | |
1676 code_length, access_flags, linenumber_table_length, | |
1677 total_lvt_length, checked_exceptions_length, CHECK_(nullHandle)); | |
1678 methodHandle m (THREAD, m_oop); | |
1679 | |
1680 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
1681 | |
1682 // Fill in information from fixed part (access_flags already set) | |
1683 m->set_constants(cp()); | |
1684 m->set_name_index(name_index); | |
1685 m->set_signature_index(signature_index); | |
1686 m->set_generic_signature_index(generic_signature_index); | |
1687 #ifdef CC_INTERP | |
1688 // hmm is there a gc issue here?? | |
1689 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
1690 m->set_result_index(rtf.type()); | |
1691 #endif | |
1692 | |
1693 if (args_size >= 0) { | |
1694 m->set_size_of_parameters(args_size); | |
1695 } else { | |
1696 m->compute_size_of_parameters(THREAD); | |
1697 } | |
1698 #ifdef ASSERT | |
1699 if (args_size >= 0) { | |
1700 m->compute_size_of_parameters(THREAD); | |
1701 assert(args_size == m->size_of_parameters(), ""); | |
1702 } | |
1703 #endif | |
1704 | |
1705 // Fill in code attribute information | |
1706 m->set_max_stack(max_stack); | |
1707 m->set_max_locals(max_locals); | |
1708 m->constMethod()->set_stackmap_data(stackmap_data()); | |
1709 | |
1710 /** | |
1711 * The exception_table field is the flag used to indicate | |
1712 * that the methodOop and it's associated constMethodOop are partially | |
1713 * initialized and thus are exempt from pre/post GC verification. Once | |
1714 * the field is set, the oops are considered fully initialized so make | |
1715 * sure that the oops can pass verification when this field is set. | |
1716 */ | |
1717 m->set_exception_table(exception_handlers()); | |
1718 | |
1719 // Copy byte codes | |
1720 if (code_length > 0) { | |
1721 memcpy(m->code_base(), code_start, code_length); | |
1722 } | |
1723 | |
1724 // Copy line number table | |
1725 if (linenumber_table != NULL) { | |
1726 memcpy(m->compressed_linenumber_table(), | |
1727 linenumber_table->buffer(), linenumber_table_length); | |
1728 } | |
1729 | |
1730 // Copy checked exceptions | |
1731 if (checked_exceptions_length > 0) { | |
1732 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1733 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
1734 } | |
1735 | |
1736 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
1737 * | |
1738 * Rules for LVT's and LVTT's are: | |
1739 * - There can be any number of LVT's and LVTT's. | |
1740 * - If there are n LVT's, it is the same as if there was just | |
1741 * one LVT containing all the entries from the n LVT's. | |
1742 * - There may be no more than one LVT entry per local variable. | |
1743 * Two LVT entries are 'equal' if these fields are the same: | |
1744 * start_pc, length, name, slot | |
1745 * - There may be no more than one LVTT entry per each LVT entry. | |
1746 * Each LVTT entry has to match some LVT entry. | |
1747 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
1748 */ | |
1749 if (total_lvt_length > 0) { | |
1750 int tbl_no, idx; | |
1751 | |
1752 promoted_flags->set_has_localvariable_table(); | |
1753 | |
1754 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
1755 initialize_hashtable(lvt_Hash); | |
1756 | |
1757 // To fill LocalVariableTable in | |
1758 Classfile_LVT_Element* cf_lvt; | |
1759 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
1760 | |
1761 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
1762 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
1763 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
1764 copy_lvt_element(&cf_lvt[idx], lvt); | |
1765 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
1766 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
1767 && _need_verify | |
1768 && _major_version >= JAVA_1_5_VERSION ) { | |
1769 clear_hashtable(lvt_Hash); | |
1770 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
1771 "entry for '%s' in class file %s", | |
1772 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
1773 CHECK_(nullHandle)); | |
1774 } | |
1775 } | |
1776 } | |
1777 | |
1778 // To merge LocalVariableTable and LocalVariableTypeTable | |
1779 Classfile_LVT_Element* cf_lvtt; | |
1780 LocalVariableTableElement lvtt_elem; | |
1781 | |
1782 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
1783 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
1784 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
1785 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
1786 int index = hash(&lvtt_elem); | |
1787 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
1788 if (entry == NULL) { | |
1789 if (_need_verify) { | |
1790 clear_hashtable(lvt_Hash); | |
1791 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
1792 "does not match any LVT entry", | |
1793 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1794 CHECK_(nullHandle)); | |
1795 } | |
1796 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
1797 clear_hashtable(lvt_Hash); | |
1798 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
1799 "entry for '%s' in class file %s", | |
1800 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1801 CHECK_(nullHandle)); | |
1802 } else { | |
1803 // to add generic signatures into LocalVariableTable | |
1804 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
1805 } | |
1806 } | |
1807 } | |
1808 clear_hashtable(lvt_Hash); | |
1809 } | |
1810 | |
1811 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
1812 runtime_visible_annotations_length, | |
1813 runtime_invisible_annotations, | |
1814 runtime_invisible_annotations_length, | |
1815 CHECK_(nullHandle)); | |
1816 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
1817 runtime_visible_parameter_annotations_length, | |
1818 runtime_invisible_parameter_annotations, | |
1819 runtime_invisible_parameter_annotations_length, | |
1820 CHECK_(nullHandle)); | |
1821 *method_default_annotations = assemble_annotations(annotation_default, | |
1822 annotation_default_length, | |
1823 NULL, | |
1824 0, | |
1825 CHECK_(nullHandle)); | |
1826 | |
1827 if (name() == vmSymbols::finalize_method_name() && | |
1828 signature() == vmSymbols::void_method_signature()) { | |
1829 if (m->is_empty_method()) { | |
1830 _has_empty_finalizer = true; | |
1831 } else { | |
1832 _has_finalizer = true; | |
1833 } | |
1834 } | |
1835 if (name() == vmSymbols::object_initializer_name() && | |
1836 signature() == vmSymbols::void_method_signature() && | |
1837 m->is_vanilla_constructor()) { | |
1838 _has_vanilla_constructor = true; | |
1839 } | |
1840 | |
1841 return m; | |
1842 } | |
1843 | |
1844 | |
1845 // The promoted_flags parameter is used to pass relevant access_flags | |
1846 // from the methods back up to the containing klass. These flag values | |
1847 // are added to klass's access_flags. | |
1848 | |
1849 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
1850 AccessFlags* promoted_flags, | |
1851 bool* has_final_method, | |
1852 objArrayOop* methods_annotations_oop, | |
1853 objArrayOop* methods_parameter_annotations_oop, | |
1854 objArrayOop* methods_default_annotations_oop, | |
1855 TRAPS) { | |
1856 ClassFileStream* cfs = stream(); | |
1857 objArrayHandle nullHandle; | |
1858 typeArrayHandle method_annotations; | |
1859 typeArrayHandle method_parameter_annotations; | |
1860 typeArrayHandle method_default_annotations; | |
1861 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
1862 u2 length = cfs->get_u2_fast(); | |
1863 if (length == 0) { | |
1864 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
1865 } else { | |
1866 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1867 objArrayHandle methods(THREAD, m); | |
1868 HandleMark hm(THREAD); | |
1869 objArrayHandle methods_annotations; | |
1870 objArrayHandle methods_parameter_annotations; | |
1871 objArrayHandle methods_default_annotations; | |
1872 for (int index = 0; index < length; index++) { | |
1873 methodHandle method = parse_method(cp, is_interface, | |
1874 promoted_flags, | |
1875 &method_annotations, | |
1876 &method_parameter_annotations, | |
1877 &method_default_annotations, | |
1878 CHECK_(nullHandle)); | |
1879 if (method->is_final()) { | |
1880 *has_final_method = true; | |
1881 } | |
1882 methods->obj_at_put(index, method()); | |
1883 if (method_annotations.not_null()) { | |
1884 if (methods_annotations.is_null()) { | |
1885 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1886 methods_annotations = objArrayHandle(THREAD, md); | |
1887 } | |
1888 methods_annotations->obj_at_put(index, method_annotations()); | |
1889 } | |
1890 if (method_parameter_annotations.not_null()) { | |
1891 if (methods_parameter_annotations.is_null()) { | |
1892 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1893 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
1894 } | |
1895 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
1896 } | |
1897 if (method_default_annotations.not_null()) { | |
1898 if (methods_default_annotations.is_null()) { | |
1899 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1900 methods_default_annotations = objArrayHandle(THREAD, md); | |
1901 } | |
1902 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
1903 } | |
1904 } | |
1905 if (_need_verify && length > 1) { | |
1906 // Check duplicated methods | |
1907 ResourceMark rm(THREAD); | |
1908 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1909 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
1910 initialize_hashtable(names_and_sigs); | |
1911 bool dup = false; | |
1912 { | |
1913 debug_only(No_Safepoint_Verifier nsv;) | |
1914 for (int i = 0; i < length; i++) { | |
1915 methodOop m = (methodOop)methods->obj_at(i); | |
1916 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
1917 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
1918 dup = true; | |
1919 break; | |
1920 } | |
1921 } | |
1922 } | |
1923 if (dup) { | |
1924 classfile_parse_error("Duplicate method name&signature in class file %s", | |
1925 CHECK_(nullHandle)); | |
1926 } | |
1927 } | |
1928 | |
1929 *methods_annotations_oop = methods_annotations(); | |
1930 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
1931 *methods_default_annotations_oop = methods_default_annotations(); | |
1932 | |
1933 return methods; | |
1934 } | |
1935 } | |
1936 | |
1937 | |
1938 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
1939 objArrayHandle methods_annotations, | |
1940 objArrayHandle methods_parameter_annotations, | |
1941 objArrayHandle methods_default_annotations, | |
1942 TRAPS) { | |
1943 typeArrayHandle nullHandle; | |
1944 int length = methods()->length(); | |
1945 // If JVMTI original method ordering is enabled we have to | |
1946 // remember the original class file ordering. | |
1947 // We temporarily use the vtable_index field in the methodOop to store the | |
1948 // class file index, so we can read in after calling qsort. | |
1949 if (JvmtiExport::can_maintain_original_method_order()) { | |
1950 for (int index = 0; index < length; index++) { | |
1951 methodOop m = methodOop(methods->obj_at(index)); | |
1952 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
1953 m->set_vtable_index(index); | |
1954 } | |
1955 } | |
1956 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
1957 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
1958 methodOopDesc::sort_methods(methods(), | |
1959 methods_annotations(), | |
1960 methods_parameter_annotations(), | |
1961 methods_default_annotations()); | |
1962 | |
1963 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
1964 if (JvmtiExport::can_maintain_original_method_order()) { | |
1965 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
1966 typeArrayHandle method_ordering(THREAD, new_ordering); | |
1967 for (int index = 0; index < length; index++) { | |
1968 methodOop m = methodOop(methods->obj_at(index)); | |
1969 int old_index = m->vtable_index(); | |
1970 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
1971 method_ordering->int_at_put(index, old_index); | |
1972 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
1973 } | |
1974 return method_ordering; | |
1975 } else { | |
1976 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
1977 } | |
1978 } | |
1979 | |
1980 | |
1981 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1982 ClassFileStream* cfs = stream(); | |
1983 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
1984 u2 sourcefile_index = cfs->get_u2_fast(); | |
1985 check_property( | |
1986 valid_cp_range(sourcefile_index, cp->length()) && | |
1987 cp->tag_at(sourcefile_index).is_utf8(), | |
1988 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
1989 sourcefile_index, CHECK); | |
1990 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
1991 } | |
1992 | |
1993 | |
1994 | |
1995 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
1996 instanceKlassHandle k, | |
1997 int length, TRAPS) { | |
1998 ClassFileStream* cfs = stream(); | |
1999 u1* sde_buffer = cfs->get_u1_buffer(); | |
2000 assert(sde_buffer != NULL, "null sde buffer"); | |
2001 | |
2002 // Don't bother storing it if there is no way to retrieve it | |
2003 if (JvmtiExport::can_get_source_debug_extension()) { | |
2004 // Optimistically assume that only 1 byte UTF format is used | |
2005 // (common case) | |
2006 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
2007 length, CHECK); | |
2008 k->set_source_debug_extension(sde_symbol); | |
2009 } | |
2010 // Got utf8 string, set stream position forward | |
2011 cfs->skip_u1(length, CHECK); | |
2012 } | |
2013 | |
2014 | |
2015 // Inner classes can be static, private or protected (classic VM does this) | |
2016 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
2017 | |
2018 // Return number of classes in the inner classes attribute table | |
2019 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2020 ClassFileStream* cfs = stream(); | |
2021 cfs->guarantee_more(2, CHECK_0); // length | |
2022 u2 length = cfs->get_u2_fast(); | |
2023 | |
2024 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
2025 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
2026 typeArrayHandle inner_classes(THREAD, ic); | |
2027 int index = 0; | |
2028 int cp_size = cp->length(); | |
2029 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
2030 for (int n = 0; n < length; n++) { | |
2031 // Inner class index | |
2032 u2 inner_class_info_index = cfs->get_u2_fast(); | |
2033 check_property( | |
2034 inner_class_info_index == 0 || | |
2035 (valid_cp_range(inner_class_info_index, cp_size) && | |
431
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diff
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|
2036 is_klass_reference(cp, inner_class_info_index)), |
0 | 2037 "inner_class_info_index %u has bad constant type in class file %s", |
2038 inner_class_info_index, CHECK_0); | |
2039 // Outer class index | |
2040 u2 outer_class_info_index = cfs->get_u2_fast(); | |
2041 check_property( | |
2042 outer_class_info_index == 0 || | |
2043 (valid_cp_range(outer_class_info_index, cp_size) && | |
431
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parents:
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diff
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|
2044 is_klass_reference(cp, outer_class_info_index)), |
0 | 2045 "outer_class_info_index %u has bad constant type in class file %s", |
2046 outer_class_info_index, CHECK_0); | |
2047 // Inner class name | |
2048 u2 inner_name_index = cfs->get_u2_fast(); | |
2049 check_property( | |
2050 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
2051 cp->tag_at(inner_name_index).is_utf8()), | |
2052 "inner_name_index %u has bad constant type in class file %s", | |
2053 inner_name_index, CHECK_0); | |
2054 if (_need_verify) { | |
2055 guarantee_property(inner_class_info_index != outer_class_info_index, | |
2056 "Class is both outer and inner class in class file %s", CHECK_0); | |
2057 } | |
2058 // Access flags | |
2059 AccessFlags inner_access_flags; | |
2060 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
2061 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2062 // Set abstract bit for old class files for backward compatibility | |
2063 flags |= JVM_ACC_ABSTRACT; | |
2064 } | |
2065 verify_legal_class_modifiers(flags, CHECK_0); | |
2066 inner_access_flags.set_flags(flags); | |
2067 | |
2068 inner_classes->short_at_put(index++, inner_class_info_index); | |
2069 inner_classes->short_at_put(index++, outer_class_info_index); | |
2070 inner_classes->short_at_put(index++, inner_name_index); | |
2071 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
2072 } | |
2073 | |
2074 // 4347400: make sure there's no duplicate entry in the classes array | |
2075 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2076 for(int i = 0; i < inner_classes->length(); i += 4) { | |
2077 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
2078 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
2079 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
2080 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
2081 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
2082 "Duplicate entry in InnerClasses in class file %s", | |
2083 CHECK_0); | |
2084 } | |
2085 } | |
2086 } | |
2087 | |
2088 // Update instanceKlass with inner class info. | |
2089 k->set_inner_classes(inner_classes()); | |
2090 return length; | |
2091 } | |
2092 | |
2093 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2094 k->set_is_synthetic(); | |
2095 } | |
2096 | |
2097 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2098 ClassFileStream* cfs = stream(); | |
2099 u2 signature_index = cfs->get_u2(CHECK); | |
2100 check_property( | |
2101 valid_cp_range(signature_index, cp->length()) && | |
2102 cp->tag_at(signature_index).is_utf8(), | |
2103 "Invalid constant pool index %u in Signature attribute in class file %s", | |
2104 signature_index, CHECK); | |
2105 k->set_generic_signature(cp->symbol_at(signature_index)); | |
2106 } | |
2107 | |
2108 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2109 ClassFileStream* cfs = stream(); | |
2110 // Set inner classes attribute to default sentinel | |
2111 k->set_inner_classes(Universe::the_empty_short_array()); | |
2112 cfs->guarantee_more(2, CHECK); // attributes_count | |
2113 u2 attributes_count = cfs->get_u2_fast(); | |
2114 bool parsed_sourcefile_attribute = false; | |
2115 bool parsed_innerclasses_attribute = false; | |
2116 bool parsed_enclosingmethod_attribute = false; | |
2117 u1* runtime_visible_annotations = NULL; | |
2118 int runtime_visible_annotations_length = 0; | |
2119 u1* runtime_invisible_annotations = NULL; | |
2120 int runtime_invisible_annotations_length = 0; | |
2121 // Iterate over attributes | |
2122 while (attributes_count--) { | |
2123 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
2124 u2 attribute_name_index = cfs->get_u2_fast(); | |
2125 u4 attribute_length = cfs->get_u4_fast(); | |
2126 check_property( | |
2127 valid_cp_range(attribute_name_index, cp->length()) && | |
2128 cp->tag_at(attribute_name_index).is_utf8(), | |
2129 "Attribute name has bad constant pool index %u in class file %s", | |
2130 attribute_name_index, CHECK); | |
2131 symbolOop tag = cp->symbol_at(attribute_name_index); | |
2132 if (tag == vmSymbols::tag_source_file()) { | |
2133 // Check for SourceFile tag | |
2134 if (_need_verify) { | |
2135 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
2136 } | |
2137 if (parsed_sourcefile_attribute) { | |
2138 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
2139 } else { | |
2140 parsed_sourcefile_attribute = true; | |
2141 } | |
2142 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
2143 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
2144 // Check for SourceDebugExtension tag | |
2145 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
2146 } else if (tag == vmSymbols::tag_inner_classes()) { | |
2147 // Check for InnerClasses tag | |
2148 if (parsed_innerclasses_attribute) { | |
2149 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
2150 } else { | |
2151 parsed_innerclasses_attribute = true; | |
2152 } | |
2153 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
2154 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2155 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
2156 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
2157 } | |
2158 } else if (tag == vmSymbols::tag_synthetic()) { | |
2159 // Check for Synthetic tag | |
2160 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
2161 if (attribute_length != 0) { | |
2162 classfile_parse_error( | |
2163 "Invalid Synthetic classfile attribute length %u in class file %s", | |
2164 attribute_length, CHECK); | |
2165 } | |
2166 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
2167 } else if (tag == vmSymbols::tag_deprecated()) { | |
2168 // Check for Deprecatd tag - 4276120 | |
2169 if (attribute_length != 0) { | |
2170 classfile_parse_error( | |
2171 "Invalid Deprecated classfile attribute length %u in class file %s", | |
2172 attribute_length, CHECK); | |
2173 } | |
2174 } else if (_major_version >= JAVA_1_5_VERSION) { | |
2175 if (tag == vmSymbols::tag_signature()) { | |
2176 if (attribute_length != 2) { | |
2177 classfile_parse_error( | |
2178 "Wrong Signature attribute length %u in class file %s", | |
2179 attribute_length, CHECK); | |
2180 } | |
2181 parse_classfile_signature_attribute(cp, k, CHECK); | |
2182 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
2183 runtime_visible_annotations_length = attribute_length; | |
2184 runtime_visible_annotations = cfs->get_u1_buffer(); | |
2185 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
2186 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
2187 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
2188 runtime_invisible_annotations_length = attribute_length; | |
2189 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
2190 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
2191 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
2192 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
2193 if (parsed_enclosingmethod_attribute) { | |
2194 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
2195 } else { | |
2196 parsed_enclosingmethod_attribute = true; | |
2197 } | |
2198 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
2199 u2 class_index = cfs->get_u2_fast(); | |
2200 u2 method_index = cfs->get_u2_fast(); | |
2201 if (class_index == 0) { | |
2202 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
2203 } | |
2204 // Validate the constant pool indices and types | |
2205 if (!cp->is_within_bounds(class_index) || | |
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2206 !is_klass_reference(cp, class_index)) { |
0 | 2207 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
2208 } | |
2209 if (method_index != 0 && | |
2210 (!cp->is_within_bounds(method_index) || | |
2211 !cp->tag_at(method_index).is_name_and_type())) { | |
2212 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
2213 } | |
2214 k->set_enclosing_method_indices(class_index, method_index); | |
2215 } else { | |
2216 // Unknown attribute | |
2217 cfs->skip_u1(attribute_length, CHECK); | |
2218 } | |
2219 } else { | |
2220 // Unknown attribute | |
2221 cfs->skip_u1(attribute_length, CHECK); | |
2222 } | |
2223 } | |
2224 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
2225 runtime_visible_annotations_length, | |
2226 runtime_invisible_annotations, | |
2227 runtime_invisible_annotations_length, | |
2228 CHECK); | |
2229 k->set_class_annotations(annotations()); | |
2230 } | |
2231 | |
2232 | |
2233 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
2234 int runtime_visible_annotations_length, | |
2235 u1* runtime_invisible_annotations, | |
2236 int runtime_invisible_annotations_length, TRAPS) { | |
2237 typeArrayHandle annotations; | |
2238 if (runtime_visible_annotations != NULL || | |
2239 runtime_invisible_annotations != NULL) { | |
2240 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
2241 runtime_invisible_annotations_length, CHECK_(annotations)); | |
2242 annotations = typeArrayHandle(THREAD, anno); | |
2243 if (runtime_visible_annotations != NULL) { | |
2244 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
2245 } | |
2246 if (runtime_invisible_annotations != NULL) { | |
2247 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
2248 } | |
2249 } | |
2250 return annotations; | |
2251 } | |
2252 | |
2253 | |
2254 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
2255 KlassHandle h_k (THREAD, fd->field_holder()); | |
2256 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
2257 if (fd->has_initial_value()) { | |
2258 BasicType t = fd->field_type(); | |
2259 switch (t) { | |
2260 case T_BYTE: | |
2261 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
2262 break; | |
2263 case T_BOOLEAN: | |
2264 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
2265 break; | |
2266 case T_CHAR: | |
2267 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
2268 break; | |
2269 case T_SHORT: | |
2270 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
2271 break; | |
2272 case T_INT: | |
2273 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
2274 break; | |
2275 case T_FLOAT: | |
2276 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
2277 break; | |
2278 case T_DOUBLE: | |
2279 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
2280 break; | |
2281 case T_LONG: | |
2282 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
2283 break; | |
2284 case T_OBJECT: | |
2285 { | |
2286 #ifdef ASSERT | |
2287 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
2288 assert(fd->signature() == sym, "just checking"); | |
2289 #endif | |
2290 oop string = fd->string_initial_value(CHECK); | |
2291 h_k()->obj_field_put(fd->offset(), string); | |
2292 } | |
2293 break; | |
2294 default: | |
2295 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
2296 "Illegal ConstantValue attribute in class file"); | |
2297 } | |
2298 } | |
2299 } | |
2300 | |
2301 | |
2302 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
2303 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
2304 // This code is for compatibility with earlier jdk's that do not | |
2305 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
2306 // the check for the "discovered" field should issue a warning if | |
2307 // the field is not found. For 1.6 this code should be issue a | |
2308 // fatal error if the "discovered" field is not found. | |
2309 // | |
2310 // Increment fac.nonstatic_oop_count so that the start of the | |
2311 // next type of non-static oops leaves room for the fake oop. | |
2312 // Do not increment next_nonstatic_oop_offset so that the | |
2313 // fake oop is place after the java.lang.ref.Reference oop | |
2314 // fields. | |
2315 // | |
2316 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2317 // field. If it is not present, artifically create a field for it. | |
2318 // This allows this VM to run on early JDK where the field is not | |
2319 // present. | |
2320 | |
2321 // | |
2322 // Increment fac.nonstatic_oop_count so that the start of the | |
2323 // next type of non-static oops leaves room for the fake oop. | |
2324 // Do not increment next_nonstatic_oop_offset so that the | |
2325 // fake oop is place after the java.lang.ref.Reference oop | |
2326 // fields. | |
2327 // | |
2328 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2329 // field. If it is not present, artifically create a field for it. | |
2330 // This allows this VM to run on early JDK where the field is not | |
2331 // present. | |
2332 int reference_sig_index = 0; | |
2333 int reference_name_index = 0; | |
2334 int reference_index = 0; | |
2335 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
2336 const int n = (*fields_ptr)()->length(); | |
2337 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
2338 int name_index = | |
2339 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
2340 int sig_index = | |
2341 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
2342 symbolOop f_name = cp->symbol_at(name_index); | |
2343 symbolOop f_sig = cp->symbol_at(sig_index); | |
2344 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
2345 // Save the index for reference signature for later use. | |
2346 // The fake discovered field does not entries in the | |
2347 // constant pool so the index for its signature cannot | |
2348 // be extracted from the constant pool. It will need | |
2349 // later, however. It's signature is vmSymbols::reference_signature() | |
2350 // so same an index for that signature. | |
2351 reference_sig_index = sig_index; | |
2352 reference_name_index = name_index; | |
2353 reference_index = i; | |
2354 } | |
2355 if (f_name == vmSymbols::reference_discovered_name() && | |
2356 f_sig == vmSymbols::reference_signature()) { | |
2357 // The values below are fake but will force extra | |
2358 // non-static oop fields and a corresponding non-static | |
2359 // oop map block to be allocated. | |
2360 extra = 0; | |
2361 break; | |
2362 } | |
2363 } | |
2364 if (extra != 0) { | |
2365 fac_ptr->nonstatic_oop_count += extra; | |
2366 // Add the additional entry to "fields" so that the klass | |
2367 // contains the "discoverd" field and the field will be initialized | |
2368 // in instances of the object. | |
2369 int fields_with_fix_length = (*fields_ptr)()->length() + | |
2370 instanceKlass::next_offset; | |
2371 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
2372 fields_with_fix_length, CHECK); | |
2373 typeArrayHandle fields_with_fix(THREAD, ff); | |
2374 | |
2375 // Take everything from the original but the length. | |
2376 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
2377 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
2378 } | |
2379 | |
2380 // Add the fake field at the end. | |
2381 int i = (*fields_ptr)->length(); | |
2382 // There is no name index for the fake "discovered" field nor | |
2383 // signature but a signature is needed so that the field will | |
2384 // be properly initialized. Use one found for | |
2385 // one of the other reference fields. Be sure the index for the | |
2386 // name is 0. In fieldDescriptor::initialize() the index of the | |
2387 // name is checked. That check is by passed for the last nonstatic | |
2388 // oop field in a java.lang.ref.Reference which is assumed to be | |
2389 // this artificial "discovered" field. An assertion checks that | |
2390 // the name index is 0. | |
2391 assert(reference_index != 0, "Missing signature for reference"); | |
2392 | |
2393 int j; | |
2394 for (j = 0; j < instanceKlass::next_offset; j++) { | |
2395 fields_with_fix->ushort_at_put(i + j, | |
2396 (*fields_ptr)->ushort_at(reference_index +j)); | |
2397 } | |
2398 // Clear the public access flag and set the private access flag. | |
2399 short flags; | |
2400 flags = | |
2401 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
2402 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
2403 flags = flags & (~JVM_ACC_PUBLIC); | |
2404 flags = flags | JVM_ACC_PRIVATE; | |
2405 AccessFlags access_flags; | |
2406 access_flags.set_flags(flags); | |
2407 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
2408 assert(access_flags.is_private(), "Failed to set private flag"); | |
2409 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
2410 flags); | |
2411 | |
2412 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
2413 == reference_name_index, "The fake reference name is incorrect"); | |
2414 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
2415 == reference_sig_index, "The fake reference signature is incorrect"); | |
2416 // The type of the field is stored in the low_offset entry during | |
2417 // parsing. | |
2418 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
2419 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
2420 | |
2421 // "fields" is allocated in the permanent generation. Disgard | |
2422 // it and let it be collected. | |
2423 (*fields_ptr) = fields_with_fix; | |
2424 } | |
2425 return; | |
2426 } | |
2427 | |
2428 | |
2429 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
2430 FieldAllocationCount *fac_ptr, TRAPS) { | |
2431 // Add fake fields for java.lang.Class instances | |
2432 // | |
2433 // This is not particularly nice. We should consider adding a | |
2434 // private transient object field at the Java level to | |
2435 // java.lang.Class. Alternatively we could add a subclass of | |
2436 // instanceKlass which provides an accessor and size computer for | |
2437 // this field, but that appears to be more code than this hack. | |
2438 // | |
2439 // NOTE that we wedge these in at the beginning rather than the | |
2440 // end of the object because the Class layout changed between JDK | |
2441 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
2442 // nonstatic oop fields were added at the Java level. The offsets | |
2443 // of these fake fields can't change between these two JDK | |
2444 // versions because when the offsets are computed at bootstrap | |
2445 // time we don't know yet which version of the JDK we're running in. | |
2446 | |
2447 // The values below are fake but will force two non-static oop fields and | |
2448 // a corresponding non-static oop map block to be allocated. | |
2449 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
2450 fac_ptr->nonstatic_oop_count += extra; | |
2451 } | |
2452 | |
2453 | |
2454 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
2455 // Cause the extra fake fields in java.lang.Class to show up before | |
2456 // the Java fields for layout compatibility between 1.3 and 1.4 | |
2457 // Incrementing next_nonstatic_oop_offset here advances the | |
2458 // location where the real java fields are placed. | |
2459 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
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2460 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
0 | 2461 } |
2462 | |
2463 | |
2464 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, | |
2465 Handle class_loader, | |
2466 Handle protection_domain, | |
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2467 GrowableArray<Handle>* cp_patches, |
0 | 2468 symbolHandle& parsed_name, |
2469 TRAPS) { | |
2470 // So that JVMTI can cache class file in the state before retransformable agents | |
2471 // have modified it | |
2472 unsigned char *cached_class_file_bytes = NULL; | |
2473 jint cached_class_file_length; | |
2474 | |
2475 ClassFileStream* cfs = stream(); | |
2476 // Timing | |
2477 PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time()); | |
2478 | |
2479 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
2480 | |
2481 if (JvmtiExport::should_post_class_file_load_hook()) { | |
2482 unsigned char* ptr = cfs->buffer(); | |
2483 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
2484 | |
2485 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
2486 &ptr, &end_ptr, | |
2487 &cached_class_file_bytes, | |
2488 &cached_class_file_length); | |
2489 | |
2490 if (ptr != cfs->buffer()) { | |
2491 // JVMTI agent has modified class file data. | |
2492 // Set new class file stream using JVMTI agent modified | |
2493 // class file data. | |
2494 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
2495 set_stream(cfs); | |
2496 } | |
2497 } | |
2498 | |
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2499 _cp_patches = cp_patches; |
0 | 2500 |
2501 instanceKlassHandle nullHandle; | |
2502 | |
2503 // Figure out whether we can skip format checking (matching classic VM behavior) | |
2504 _need_verify = Verifier::should_verify_for(class_loader()); | |
2505 | |
2506 // Set the verify flag in stream | |
2507 cfs->set_verify(_need_verify); | |
2508 | |
2509 // Save the class file name for easier error message printing. | |
2510 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
2511 | |
2512 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
2513 // Magic value | |
2514 u4 magic = cfs->get_u4_fast(); | |
2515 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
2516 "Incompatible magic value %u in class file %s", | |
2517 magic, CHECK_(nullHandle)); | |
2518 | |
2519 // Version numbers | |
2520 u2 minor_version = cfs->get_u2_fast(); | |
2521 u2 major_version = cfs->get_u2_fast(); | |
2522 | |
2523 // Check version numbers - we check this even with verifier off | |
2524 if (!is_supported_version(major_version, minor_version)) { | |
2525 if (name.is_null()) { | |
2526 Exceptions::fthrow( | |
2527 THREAD_AND_LOCATION, | |
2528 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2529 "Unsupported major.minor version %u.%u", | |
2530 major_version, | |
2531 minor_version); | |
2532 } else { | |
2533 ResourceMark rm(THREAD); | |
2534 Exceptions::fthrow( | |
2535 THREAD_AND_LOCATION, | |
2536 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2537 "%s : Unsupported major.minor version %u.%u", | |
2538 name->as_C_string(), | |
2539 major_version, | |
2540 minor_version); | |
2541 } | |
2542 return nullHandle; | |
2543 } | |
2544 | |
2545 _major_version = major_version; | |
2546 _minor_version = minor_version; | |
2547 | |
2548 | |
2549 // Check if verification needs to be relaxed for this class file | |
2550 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
2551 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
2552 | |
2553 // Constant pool | |
2554 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
2555 int cp_size = cp->length(); | |
2556 | |
2557 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
2558 | |
2559 // Access flags | |
2560 AccessFlags access_flags; | |
2561 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
2562 | |
2563 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2564 // Set abstract bit for old class files for backward compatibility | |
2565 flags |= JVM_ACC_ABSTRACT; | |
2566 } | |
2567 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
2568 access_flags.set_flags(flags); | |
2569 | |
2570 // This class and superclass | |
2571 instanceKlassHandle super_klass; | |
2572 u2 this_class_index = cfs->get_u2_fast(); | |
2573 check_property( | |
2574 valid_cp_range(this_class_index, cp_size) && | |
2575 cp->tag_at(this_class_index).is_unresolved_klass(), | |
2576 "Invalid this class index %u in constant pool in class file %s", | |
2577 this_class_index, CHECK_(nullHandle)); | |
2578 | |
2579 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
2580 assert(class_name.not_null(), "class_name can't be null"); | |
2581 | |
2582 // It's important to set parsed_name *before* resolving the super class. | |
2583 // (it's used for cleanup by the caller if parsing fails) | |
2584 parsed_name = class_name; | |
2585 | |
2586 // Update _class_name which could be null previously to be class_name | |
2587 _class_name = class_name; | |
2588 | |
2589 // Don't need to check whether this class name is legal or not. | |
2590 // It has been checked when constant pool is parsed. | |
2591 // However, make sure it is not an array type. | |
2592 if (_need_verify) { | |
2593 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
2594 "Bad class name in class file %s", | |
2595 CHECK_(nullHandle)); | |
2596 } | |
2597 | |
2598 klassOop preserve_this_klass; // for storing result across HandleMark | |
2599 | |
2600 // release all handles when parsing is done | |
2601 { HandleMark hm(THREAD); | |
2602 | |
2603 // Checks if name in class file matches requested name | |
2604 if (name.not_null() && class_name() != name()) { | |
2605 ResourceMark rm(THREAD); | |
2606 Exceptions::fthrow( | |
2607 THREAD_AND_LOCATION, | |
2608 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
2609 "%s (wrong name: %s)", | |
2610 name->as_C_string(), | |
2611 class_name->as_C_string() | |
2612 ); | |
2613 return nullHandle; | |
2614 } | |
2615 | |
2616 if (TraceClassLoadingPreorder) { | |
2617 tty->print("[Loading %s", name()->as_klass_external_name()); | |
2618 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
2619 tty->print_cr("]"); | |
2620 } | |
2621 | |
2622 u2 super_class_index = cfs->get_u2_fast(); | |
2623 if (super_class_index == 0) { | |
2624 check_property(class_name() == vmSymbols::java_lang_Object(), | |
2625 "Invalid superclass index %u in class file %s", | |
2626 super_class_index, | |
2627 CHECK_(nullHandle)); | |
2628 } else { | |
2629 check_property(valid_cp_range(super_class_index, cp_size) && | |
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2630 is_klass_reference(cp, super_class_index), |
0 | 2631 "Invalid superclass index %u in class file %s", |
2632 super_class_index, | |
2633 CHECK_(nullHandle)); | |
2634 // The class name should be legal because it is checked when parsing constant pool. | |
2635 // However, make sure it is not an array type. | |
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2636 bool is_array = false; |
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2637 if (cp->tag_at(super_class_index).is_klass()) { |
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2638 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
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2639 if (_need_verify) |
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2640 is_array = super_klass->oop_is_array(); |
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2641 } else if (_need_verify) { |
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2642 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
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2643 } |
0 | 2644 if (_need_verify) { |
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2645 guarantee_property(!is_array, |
0 | 2646 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
2647 } | |
2648 } | |
2649 | |
2650 // Interfaces | |
2651 u2 itfs_len = cfs->get_u2_fast(); | |
2652 objArrayHandle local_interfaces; | |
2653 if (itfs_len == 0) { | |
2654 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
2655 } else { | |
2656 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle)); | |
2657 } | |
2658 | |
2659 // Fields (offsets are filled in later) | |
2660 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
2661 objArrayHandle fields_annotations; | |
2662 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
2663 // Methods | |
2664 bool has_final_method = false; | |
2665 AccessFlags promoted_flags; | |
2666 promoted_flags.set_flags(0); | |
2667 // These need to be oop pointers because they are allocated lazily | |
2668 // inside parse_methods inside a nested HandleMark | |
2669 objArrayOop methods_annotations_oop = NULL; | |
2670 objArrayOop methods_parameter_annotations_oop = NULL; | |
2671 objArrayOop methods_default_annotations_oop = NULL; | |
2672 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
2673 &promoted_flags, | |
2674 &has_final_method, | |
2675 &methods_annotations_oop, | |
2676 &methods_parameter_annotations_oop, | |
2677 &methods_default_annotations_oop, | |
2678 CHECK_(nullHandle)); | |
2679 | |
2680 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
2681 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
2682 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
2683 | |
2684 // We check super class after class file is parsed and format is checked | |
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2685 if (super_class_index > 0 && super_klass.is_null()) { |
0 | 2686 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); |
2687 if (access_flags.is_interface()) { | |
2688 // Before attempting to resolve the superclass, check for class format | |
2689 // errors not checked yet. | |
2690 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
2691 "Interfaces must have java.lang.Object as superclass in class file %s", | |
2692 CHECK_(nullHandle)); | |
2693 } | |
2694 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
2695 sk, | |
2696 class_loader, | |
2697 protection_domain, | |
2698 true, | |
2699 CHECK_(nullHandle)); | |
2700 KlassHandle kh (THREAD, k); | |
2701 super_klass = instanceKlassHandle(THREAD, kh()); | |
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2702 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
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2703 } |
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2704 if (super_klass.not_null()) { |
0 | 2705 if (super_klass->is_interface()) { |
2706 ResourceMark rm(THREAD); | |
2707 Exceptions::fthrow( | |
2708 THREAD_AND_LOCATION, | |
2709 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
2710 "class %s has interface %s as super class", | |
2711 class_name->as_klass_external_name(), | |
2712 super_klass->external_name() | |
2713 ); | |
2714 return nullHandle; | |
2715 } | |
2716 // Make sure super class is not final | |
2717 if (super_klass->is_final()) { | |
2718 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
2719 } | |
2720 } | |
2721 | |
2722 // Compute the transitive list of all unique interfaces implemented by this class | |
2723 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
2724 | |
2725 // sort methods | |
2726 typeArrayHandle method_ordering = sort_methods(methods, | |
2727 methods_annotations, | |
2728 methods_parameter_annotations, | |
2729 methods_default_annotations, | |
2730 CHECK_(nullHandle)); | |
2731 | |
2732 // promote flags from parse_methods() to the klass' flags | |
2733 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
2734 | |
2735 // Size of Java vtable (in words) | |
2736 int vtable_size = 0; | |
2737 int itable_size = 0; | |
2738 int num_miranda_methods = 0; | |
2739 | |
2740 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
2741 num_miranda_methods, | |
2742 super_klass(), | |
2743 methods(), | |
2744 access_flags, | |
2745 class_loader(), | |
2746 class_name(), | |
2747 local_interfaces()); | |
2748 | |
2749 // Size of Java itable (in words) | |
2750 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
2751 | |
2752 // Field size and offset computation | |
2753 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
2754 #ifndef PRODUCT | |
2755 int orig_nonstatic_field_size = 0; | |
2756 #endif | |
2757 int static_field_size = 0; | |
2758 int next_static_oop_offset; | |
2759 int next_static_double_offset; | |
2760 int next_static_word_offset; | |
2761 int next_static_short_offset; | |
2762 int next_static_byte_offset; | |
2763 int next_static_type_offset; | |
2764 int next_nonstatic_oop_offset; | |
2765 int next_nonstatic_double_offset; | |
2766 int next_nonstatic_word_offset; | |
2767 int next_nonstatic_short_offset; | |
2768 int next_nonstatic_byte_offset; | |
2769 int next_nonstatic_type_offset; | |
2770 int first_nonstatic_oop_offset; | |
2771 int first_nonstatic_field_offset; | |
2772 int next_nonstatic_field_offset; | |
2773 | |
2774 // Calculate the starting byte offsets | |
2775 next_static_oop_offset = (instanceKlass::header_size() + | |
2776 align_object_offset(vtable_size) + | |
2777 align_object_offset(itable_size)) * wordSize; | |
2778 next_static_double_offset = next_static_oop_offset + | |
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2779 (fac.static_oop_count * heapOopSize); |
0 | 2780 if ( fac.static_double_count && |
2781 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
2782 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
2783 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
2784 } | |
2785 | |
2786 next_static_word_offset = next_static_double_offset + | |
2787 (fac.static_double_count * BytesPerLong); | |
2788 next_static_short_offset = next_static_word_offset + | |
2789 (fac.static_word_count * BytesPerInt); | |
2790 next_static_byte_offset = next_static_short_offset + | |
2791 (fac.static_short_count * BytesPerShort); | |
2792 next_static_type_offset = align_size_up((next_static_byte_offset + | |
2793 fac.static_byte_count ), wordSize ); | |
2794 static_field_size = (next_static_type_offset - | |
2795 next_static_oop_offset) / wordSize; | |
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2796 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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2797 nonstatic_field_size * heapOopSize; |
0 | 2798 next_nonstatic_field_offset = first_nonstatic_field_offset; |
2799 | |
2800 // Add fake fields for java.lang.Class instances (also see below) | |
2801 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2802 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
2803 } | |
2804 | |
2805 // Add a fake "discovered" field if it is not present | |
2806 // for compatibility with earlier jdk's. | |
2807 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
2808 && class_loader.is_null()) { | |
2809 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
2810 } | |
2811 // end of "discovered" field compactibility fix | |
2812 | |
2813 int nonstatic_double_count = fac.nonstatic_double_count; | |
2814 int nonstatic_word_count = fac.nonstatic_word_count; | |
2815 int nonstatic_short_count = fac.nonstatic_short_count; | |
2816 int nonstatic_byte_count = fac.nonstatic_byte_count; | |
2817 int nonstatic_oop_count = fac.nonstatic_oop_count; | |
2818 | |
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2819 bool super_has_nonstatic_fields = |
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2820 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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2821 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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2822 ((nonstatic_double_count + nonstatic_word_count + |
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2823 nonstatic_short_count + nonstatic_byte_count + |
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2824 nonstatic_oop_count) != 0); |
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2825 |
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2826 |
0 | 2827 // Prepare list of oops for oop maps generation. |
2828 u2* nonstatic_oop_offsets; | |
2829 u2* nonstatic_oop_length; | |
2830 int nonstatic_oop_map_count = 0; | |
2831 | |
2832 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2833 THREAD, u2, nonstatic_oop_count+1); | |
2834 nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2835 THREAD, u2, nonstatic_oop_count+1); | |
2836 | |
2837 // Add fake fields for java.lang.Class instances (also see above). | |
2838 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
2839 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2840 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
2841 nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset; | |
2842 int fake_oop_count = (( next_nonstatic_field_offset - | |
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2843 first_nonstatic_field_offset ) / heapOopSize); |
0 | 2844 nonstatic_oop_length [0] = (u2)fake_oop_count; |
2845 nonstatic_oop_map_count = 1; | |
2846 nonstatic_oop_count -= fake_oop_count; | |
2847 first_nonstatic_oop_offset = first_nonstatic_field_offset; | |
2848 } else { | |
2849 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
2850 } | |
2851 | |
2852 #ifndef PRODUCT | |
2853 if( PrintCompactFieldsSavings ) { | |
2854 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
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2855 (nonstatic_oop_count * heapOopSize); |
0 | 2856 if ( nonstatic_double_count > 0 ) { |
2857 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
2858 } | |
2859 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
2860 (nonstatic_double_count * BytesPerLong); | |
2861 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
2862 (nonstatic_word_count * BytesPerInt); | |
2863 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
2864 (nonstatic_short_count * BytesPerShort); | |
2865 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
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2866 nonstatic_byte_count ), heapOopSize ); |
0 | 2867 orig_nonstatic_field_size = nonstatic_field_size + |
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2868 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
0 | 2869 } |
2870 #endif | |
2871 bool compact_fields = CompactFields; | |
2872 int allocation_style = FieldsAllocationStyle; | |
2873 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range? | |
2874 assert(false, "0 <= FieldsAllocationStyle <= 1"); | |
2875 allocation_style = 1; // Optimistic | |
2876 } | |
2877 | |
2878 // The next classes have predefined hard-coded fields offsets | |
2879 // (see in JavaClasses::compute_hard_coded_offsets()). | |
2880 // Use default fields allocation order for them. | |
2881 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
2882 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
2883 class_name() == vmSymbols::java_lang_Class() || | |
2884 class_name() == vmSymbols::java_lang_ClassLoader() || | |
2885 class_name() == vmSymbols::java_lang_ref_Reference() || | |
2886 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
2887 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
2888 class_name() == vmSymbols::java_lang_String() || | |
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2889 class_name() == vmSymbols::java_lang_Throwable() || |
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2890 class_name() == vmSymbols::java_lang_Boolean() || |
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2891 class_name() == vmSymbols::java_lang_Character() || |
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2892 class_name() == vmSymbols::java_lang_Float() || |
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2893 class_name() == vmSymbols::java_lang_Double() || |
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2894 class_name() == vmSymbols::java_lang_Byte() || |
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2895 class_name() == vmSymbols::java_lang_Short() || |
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2896 class_name() == vmSymbols::java_lang_Integer() || |
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2897 class_name() == vmSymbols::java_lang_Long())) { |
0 | 2898 allocation_style = 0; // Allocate oops first |
2899 compact_fields = false; // Don't compact fields | |
2900 } | |
2901 | |
2902 if( allocation_style == 0 ) { | |
2903 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
2904 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
2905 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
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2906 (nonstatic_oop_count * heapOopSize); |
0 | 2907 } else if( allocation_style == 1 ) { |
2908 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
2909 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
2910 } else { | |
2911 ShouldNotReachHere(); | |
2912 } | |
2913 | |
2914 int nonstatic_oop_space_count = 0; | |
2915 int nonstatic_word_space_count = 0; | |
2916 int nonstatic_short_space_count = 0; | |
2917 int nonstatic_byte_space_count = 0; | |
2918 int nonstatic_oop_space_offset; | |
2919 int nonstatic_word_space_offset; | |
2920 int nonstatic_short_space_offset; | |
2921 int nonstatic_byte_space_offset; | |
2922 | |
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2923 if( nonstatic_double_count > 0 ) { |
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2924 int offset = next_nonstatic_double_offset; |
0 | 2925 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
2926 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
2927 // Allocate available fields into the gap before double field. | |
2928 int length = next_nonstatic_double_offset - offset; | |
2929 assert(length == BytesPerInt, ""); | |
2930 nonstatic_word_space_offset = offset; | |
2931 if( nonstatic_word_count > 0 ) { | |
2932 nonstatic_word_count -= 1; | |
2933 nonstatic_word_space_count = 1; // Only one will fit | |
2934 length -= BytesPerInt; | |
2935 offset += BytesPerInt; | |
2936 } | |
2937 nonstatic_short_space_offset = offset; | |
2938 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
2939 nonstatic_short_count -= 1; | |
2940 nonstatic_short_space_count += 1; | |
2941 length -= BytesPerShort; | |
2942 offset += BytesPerShort; | |
2943 } | |
2944 nonstatic_byte_space_offset = offset; | |
2945 while( length > 0 && nonstatic_byte_count > 0 ) { | |
2946 nonstatic_byte_count -= 1; | |
2947 nonstatic_byte_space_count += 1; | |
2948 length -= 1; | |
2949 } | |
2950 // Allocate oop field in the gap if there are no other fields for that. | |
2951 nonstatic_oop_space_offset = offset; | |
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2952 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
0 | 2953 allocation_style != 0 ) { // when oop fields not first |
2954 nonstatic_oop_count -= 1; | |
2955 nonstatic_oop_space_count = 1; // Only one will fit | |
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2956 length -= heapOopSize; |
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2957 offset += heapOopSize; |
0 | 2958 } |
2959 } | |
2960 } | |
2961 | |
2962 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
2963 (nonstatic_double_count * BytesPerLong); | |
2964 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
2965 (nonstatic_word_count * BytesPerInt); | |
2966 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
2967 (nonstatic_short_count * BytesPerShort); | |
2968 | |
2969 int notaligned_offset; | |
2970 if( allocation_style == 0 ) { | |
2971 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
2972 } else { // allocation_style == 1 | |
2973 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
2974 if( nonstatic_oop_count > 0 ) { | |
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2975 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
0 | 2976 } |
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2977 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
0 | 2978 } |
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2979 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
0 | 2980 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
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2981 - first_nonstatic_field_offset)/heapOopSize); |
0 | 2982 |
2983 // Iterate over fields again and compute correct offsets. | |
2984 // The field allocation type was temporarily stored in the offset slot. | |
2985 // oop fields are located before non-oop fields (static and non-static). | |
2986 int len = fields->length(); | |
2987 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
2988 int real_offset; | |
2989 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4); | |
2990 switch (atype) { | |
2991 case STATIC_OOP: | |
2992 real_offset = next_static_oop_offset; | |
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2993 next_static_oop_offset += heapOopSize; |
0 | 2994 break; |
2995 case STATIC_BYTE: | |
2996 real_offset = next_static_byte_offset; | |
2997 next_static_byte_offset += 1; | |
2998 break; | |
2999 case STATIC_SHORT: | |
3000 real_offset = next_static_short_offset; | |
3001 next_static_short_offset += BytesPerShort; | |
3002 break; | |
3003 case STATIC_WORD: | |
3004 real_offset = next_static_word_offset; | |
3005 next_static_word_offset += BytesPerInt; | |
3006 break; | |
3007 case STATIC_ALIGNED_DOUBLE: | |
3008 case STATIC_DOUBLE: | |
3009 real_offset = next_static_double_offset; | |
3010 next_static_double_offset += BytesPerLong; | |
3011 break; | |
3012 case NONSTATIC_OOP: | |
3013 if( nonstatic_oop_space_count > 0 ) { | |
3014 real_offset = nonstatic_oop_space_offset; | |
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3015 nonstatic_oop_space_offset += heapOopSize; |
0 | 3016 nonstatic_oop_space_count -= 1; |
3017 } else { | |
3018 real_offset = next_nonstatic_oop_offset; | |
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3019 next_nonstatic_oop_offset += heapOopSize; |
0 | 3020 } |
3021 // Update oop maps | |
3022 if( nonstatic_oop_map_count > 0 && | |
3023 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
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3024 (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * heapOopSize) ) { |
0 | 3025 // Extend current oop map |
3026 nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1; | |
3027 } else { | |
3028 // Create new oop map | |
3029 nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset; | |
3030 nonstatic_oop_length [nonstatic_oop_map_count] = 1; | |
3031 nonstatic_oop_map_count += 1; | |
3032 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
3033 first_nonstatic_oop_offset = real_offset; | |
3034 } | |
3035 } | |
3036 break; | |
3037 case NONSTATIC_BYTE: | |
3038 if( nonstatic_byte_space_count > 0 ) { | |
3039 real_offset = nonstatic_byte_space_offset; | |
3040 nonstatic_byte_space_offset += 1; | |
3041 nonstatic_byte_space_count -= 1; | |
3042 } else { | |
3043 real_offset = next_nonstatic_byte_offset; | |
3044 next_nonstatic_byte_offset += 1; | |
3045 } | |
3046 break; | |
3047 case NONSTATIC_SHORT: | |
3048 if( nonstatic_short_space_count > 0 ) { | |
3049 real_offset = nonstatic_short_space_offset; | |
3050 nonstatic_short_space_offset += BytesPerShort; | |
3051 nonstatic_short_space_count -= 1; | |
3052 } else { | |
3053 real_offset = next_nonstatic_short_offset; | |
3054 next_nonstatic_short_offset += BytesPerShort; | |
3055 } | |
3056 break; | |
3057 case NONSTATIC_WORD: | |
3058 if( nonstatic_word_space_count > 0 ) { | |
3059 real_offset = nonstatic_word_space_offset; | |
3060 nonstatic_word_space_offset += BytesPerInt; | |
3061 nonstatic_word_space_count -= 1; | |
3062 } else { | |
3063 real_offset = next_nonstatic_word_offset; | |
3064 next_nonstatic_word_offset += BytesPerInt; | |
3065 } | |
3066 break; | |
3067 case NONSTATIC_ALIGNED_DOUBLE: | |
3068 case NONSTATIC_DOUBLE: | |
3069 real_offset = next_nonstatic_double_offset; | |
3070 next_nonstatic_double_offset += BytesPerLong; | |
3071 break; | |
3072 default: | |
3073 ShouldNotReachHere(); | |
3074 } | |
3075 fields->short_at_put(i+4, extract_low_short_from_int(real_offset) ); | |
3076 fields->short_at_put(i+5, extract_high_short_from_int(real_offset) ); | |
3077 } | |
3078 | |
3079 // Size of instances | |
3080 int instance_size; | |
3081 | |
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3082 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
0 | 3083 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
3084 | |
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3085 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 | 3086 |
3087 // Size of non-static oop map blocks (in words) allocated at end of klass | |
3088 int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset); | |
3089 | |
3090 // Compute reference type | |
3091 ReferenceType rt; | |
3092 if (super_klass() == NULL) { | |
3093 rt = REF_NONE; | |
3094 } else { | |
3095 rt = super_klass->reference_type(); | |
3096 } | |
3097 | |
3098 // We can now create the basic klassOop for this klass | |
3099 klassOop ik = oopFactory::new_instanceKlass( | |
3100 vtable_size, itable_size, | |
3101 static_field_size, nonstatic_oop_map_size, | |
3102 rt, CHECK_(nullHandle)); | |
3103 instanceKlassHandle this_klass (THREAD, ik); | |
3104 | |
3105 assert(this_klass->static_field_size() == static_field_size && | |
3106 this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check"); | |
3107 | |
3108 // Fill in information already parsed | |
3109 this_klass->set_access_flags(access_flags); | |
3110 jint lh = Klass::instance_layout_helper(instance_size, false); | |
3111 this_klass->set_layout_helper(lh); | |
3112 assert(this_klass->oop_is_instance(), "layout is correct"); | |
3113 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
3114 // Not yet: supers are done below to support the new subtype-checking fields | |
3115 //this_klass->set_super(super_klass()); | |
3116 this_klass->set_class_loader(class_loader()); | |
3117 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
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3118 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
0 | 3119 this_klass->set_static_oop_field_size(fac.static_oop_count); |
3120 cp->set_pool_holder(this_klass()); | |
3121 this_klass->set_constants(cp()); | |
3122 this_klass->set_local_interfaces(local_interfaces()); | |
3123 this_klass->set_fields(fields()); | |
3124 this_klass->set_methods(methods()); | |
3125 if (has_final_method) { | |
3126 this_klass->set_has_final_method(); | |
3127 } | |
3128 this_klass->set_method_ordering(method_ordering()); | |
3129 this_klass->set_initial_method_idnum(methods->length()); | |
3130 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
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3131 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
0 | 3132 this_klass->set_protection_domain(protection_domain()); |
3133 this_klass->set_fields_annotations(fields_annotations()); | |
3134 this_klass->set_methods_annotations(methods_annotations()); | |
3135 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
3136 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
3137 | |
3138 this_klass->set_minor_version(minor_version); | |
3139 this_klass->set_major_version(major_version); | |
3140 | |
3141 if (cached_class_file_bytes != NULL) { | |
3142 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
3143 this_klass->set_cached_class_file(cached_class_file_bytes, | |
3144 cached_class_file_length); | |
3145 } | |
3146 | |
3147 // Miranda methods | |
3148 if ((num_miranda_methods > 0) || | |
3149 // if this class introduced new miranda methods or | |
3150 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
3151 // super class exists and this class inherited miranda methods | |
3152 ) { | |
3153 this_klass->set_has_miranda_methods(); // then set a flag | |
3154 } | |
3155 | |
3156 // Additional attributes | |
3157 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
3158 | |
3159 // Make sure this is the end of class file stream | |
3160 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
3161 | |
3162 // Initialize static fields | |
3163 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
3164 | |
3165 // VerifyOops believes that once this has been set, the object is completely loaded. | |
3166 // Compute transitive closure of interfaces this class implements | |
3167 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
3168 | |
3169 // Fill in information needed to compute superclasses. | |
3170 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
3171 | |
3172 // Initialize itable offset tables | |
3173 klassItable::setup_itable_offset_table(this_klass); | |
3174 | |
3175 // Do final class setup | |
3176 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length); | |
3177 | |
3178 set_precomputed_flags(this_klass); | |
3179 | |
3180 // reinitialize modifiers, using the InnerClasses attribute | |
3181 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
3182 this_klass->set_modifier_flags(computed_modifiers); | |
3183 | |
3184 // check if this class can access its super class | |
3185 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
3186 | |
3187 // check if this class can access its superinterfaces | |
3188 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
3189 | |
3190 // check if this class overrides any final method | |
3191 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
3192 | |
3193 // check that if this class is an interface then it doesn't have static methods | |
3194 if (this_klass->is_interface()) { | |
3195 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
3196 } | |
3197 | |
3198 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
3199 false /* not shared class */); | |
3200 | |
3201 if (TraceClassLoading) { | |
3202 // print in a single call to reduce interleaving of output | |
3203 if (cfs->source() != NULL) { | |
3204 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3205 cfs->source()); | |
3206 } else if (class_loader.is_null()) { | |
3207 if (THREAD->is_Java_thread()) { | |
3208 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
3209 tty->print("[Loaded %s by instance of %s]\n", | |
3210 this_klass->external_name(), | |
3211 instanceKlass::cast(caller)->external_name()); | |
3212 } else { | |
3213 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
3214 } | |
3215 } else { | |
3216 ResourceMark rm; | |
3217 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3218 instanceKlass::cast(class_loader->klass())->external_name()); | |
3219 } | |
3220 } | |
3221 | |
3222 if (TraceClassResolution) { | |
3223 // print out the superclass. | |
3224 const char * from = Klass::cast(this_klass())->external_name(); | |
3225 if (this_klass->java_super() != NULL) { | |
3226 tty->print("RESOLVE %s %s\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); | |
3227 } | |
3228 // print out each of the interface classes referred to by this class. | |
3229 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
3230 if (!local_interfaces.is_null()) { | |
3231 int length = local_interfaces->length(); | |
3232 for (int i = 0; i < length; i++) { | |
3233 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3234 instanceKlass* to_class = instanceKlass::cast(k); | |
3235 const char * to = to_class->external_name(); | |
3236 tty->print("RESOLVE %s %s\n", from, to); | |
3237 } | |
3238 } | |
3239 } | |
3240 | |
3241 #ifndef PRODUCT | |
3242 if( PrintCompactFieldsSavings ) { | |
3243 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
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3244 tty->print("[Saved %d of %d bytes in %s]\n", |
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3245 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
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3246 orig_nonstatic_field_size*heapOopSize, |
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3247 this_klass->external_name()); |
0 | 3248 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
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3249 tty->print("[Wasted %d over %d bytes in %s]\n", |
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3250 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
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3251 orig_nonstatic_field_size*heapOopSize, |
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3252 this_klass->external_name()); |
0 | 3253 } |
3254 } | |
3255 #endif | |
3256 | |
3257 // preserve result across HandleMark | |
3258 preserve_this_klass = this_klass(); | |
3259 } | |
3260 | |
3261 // Create new handle outside HandleMark | |
3262 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
3263 debug_only(this_klass->as_klassOop()->verify();) | |
3264 | |
3265 return this_klass; | |
3266 } | |
3267 | |
3268 | |
3269 int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) { | |
3270 int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size(); | |
3271 if (nonstatic_oop_map_count > 0) { | |
3272 // We have oops to add to map | |
3273 if (map_size == 0) { | |
3274 map_size = nonstatic_oop_map_count; | |
3275 } else { | |
3276 // Check whether we should add a new map block or whether the last one can be extended | |
3277 OopMapBlock* first_map = super->start_of_nonstatic_oop_maps(); | |
3278 OopMapBlock* last_map = first_map + map_size - 1; | |
3279 | |
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3280 int next_offset = last_map->offset() + (last_map->length() * heapOopSize); |
0 | 3281 if (next_offset == first_nonstatic_oop_offset) { |
3282 // There is no gap bettwen superklass's last oop field and first | |
3283 // local oop field, merge maps. | |
3284 nonstatic_oop_map_count -= 1; | |
3285 } else { | |
3286 // Superklass didn't end with a oop field, add extra maps | |
3287 assert(next_offset<first_nonstatic_oop_offset, "just checking"); | |
3288 } | |
3289 map_size += nonstatic_oop_map_count; | |
3290 } | |
3291 } | |
3292 return map_size; | |
3293 } | |
3294 | |
3295 | |
3296 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
3297 int nonstatic_oop_map_count, | |
3298 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) { | |
3299 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); | |
3300 OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size(); | |
3301 instanceKlass* super = k->superklass(); | |
3302 if (super != NULL) { | |
3303 int super_oop_map_size = super->nonstatic_oop_map_size(); | |
3304 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); | |
3305 // Copy maps from superklass | |
3306 while (super_oop_map_size-- > 0) { | |
3307 *this_oop_map++ = *super_oop_map++; | |
3308 } | |
3309 } | |
3310 if (nonstatic_oop_map_count > 0) { | |
3311 if (this_oop_map + nonstatic_oop_map_count > last_oop_map) { | |
3312 // Calculated in compute_oop_map_size() number of oop maps is less then | |
3313 // collected oop maps since there is no gap between superklass's last oop | |
3314 // field and first local oop field. Extend the last oop map copied | |
3315 // from the superklass instead of creating new one. | |
3316 nonstatic_oop_map_count--; | |
3317 nonstatic_oop_offsets++; | |
3318 this_oop_map--; | |
3319 this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++); | |
3320 this_oop_map++; | |
3321 } | |
3322 assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking"); | |
3323 // Add new map blocks, fill them | |
3324 while (nonstatic_oop_map_count-- > 0) { | |
3325 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
3326 this_oop_map->set_length(*nonstatic_oop_length++); | |
3327 this_oop_map++; | |
3328 } | |
3329 } | |
3330 } | |
3331 | |
3332 | |
3333 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
3334 klassOop super = k->super(); | |
3335 | |
3336 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
3337 // in which case we don't have to register objects as finalizable | |
3338 if (!_has_empty_finalizer) { | |
3339 if (_has_finalizer || | |
3340 (super != NULL && super->klass_part()->has_finalizer())) { | |
3341 k->set_has_finalizer(); | |
3342 } | |
3343 } | |
3344 | |
3345 #ifdef ASSERT | |
3346 bool f = false; | |
3347 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
3348 vmSymbols::void_method_signature()); | |
3349 if (m != NULL && !m->is_empty_method()) { | |
3350 f = true; | |
3351 } | |
3352 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
3353 #endif | |
3354 | |
3355 // Check if this klass supports the java.lang.Cloneable interface | |
3356 if (SystemDictionary::cloneable_klass_loaded()) { | |
3357 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) { | |
3358 k->set_is_cloneable(); | |
3359 } | |
3360 } | |
3361 | |
3362 // Check if this klass has a vanilla default constructor | |
3363 if (super == NULL) { | |
3364 // java.lang.Object has empty default constructor | |
3365 k->set_has_vanilla_constructor(); | |
3366 } else { | |
3367 if (Klass::cast(super)->has_vanilla_constructor() && | |
3368 _has_vanilla_constructor) { | |
3369 k->set_has_vanilla_constructor(); | |
3370 } | |
3371 #ifdef ASSERT | |
3372 bool v = false; | |
3373 if (Klass::cast(super)->has_vanilla_constructor()) { | |
3374 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
3375 ), vmSymbols::void_method_signature()); | |
3376 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
3377 v = true; | |
3378 } | |
3379 } | |
3380 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
3381 #endif | |
3382 } | |
3383 | |
3384 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
3385 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
3386 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
3387 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
3388 || k->is_abstract() || k->is_interface() | |
3389 || (k->name() == vmSymbols::java_lang_Class() | |
3390 && k->class_loader() == NULL) | |
3391 || k->size_helper() >= FastAllocateSizeLimit) { | |
3392 // Forbid fast-path allocation. | |
3393 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
3394 k->set_layout_helper(lh); | |
3395 } | |
3396 } | |
3397 | |
3398 | |
3399 // utility method for appending and array with check for duplicates | |
3400 | |
3401 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
3402 // iterate over new interfaces | |
3403 for (int i = 0; i < ifs->length(); i++) { | |
3404 oop e = ifs->obj_at(i); | |
3405 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
3406 // check for duplicates | |
3407 bool duplicate = false; | |
3408 for (int j = 0; j < index; j++) { | |
3409 if (result->obj_at(j) == e) { | |
3410 duplicate = true; | |
3411 break; | |
3412 } | |
3413 } | |
3414 // add new interface | |
3415 if (!duplicate) { | |
3416 result->obj_at_put(index++, e); | |
3417 } | |
3418 } | |
3419 } | |
3420 | |
3421 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
3422 // Compute maximum size for transitive interfaces | |
3423 int max_transitive_size = 0; | |
3424 int super_size = 0; | |
3425 // Add superclass transitive interfaces size | |
3426 if (super.not_null()) { | |
3427 super_size = super->transitive_interfaces()->length(); | |
3428 max_transitive_size += super_size; | |
3429 } | |
3430 // Add local interfaces' super interfaces | |
3431 int local_size = local_ifs->length(); | |
3432 for (int i = 0; i < local_size; i++) { | |
3433 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3434 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
3435 } | |
3436 // Finally add local interfaces | |
3437 max_transitive_size += local_size; | |
3438 // Construct array | |
3439 objArrayHandle result; | |
3440 if (max_transitive_size == 0) { | |
3441 // no interfaces, use canonicalized array | |
3442 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
3443 } else if (max_transitive_size == super_size) { | |
3444 // no new local interfaces added, share superklass' transitive interface array | |
3445 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
3446 } else if (max_transitive_size == local_size) { | |
3447 // only local interfaces added, share local interface array | |
3448 result = local_ifs; | |
3449 } else { | |
3450 objArrayHandle nullHandle; | |
3451 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
3452 result = objArrayHandle(THREAD, new_objarray); | |
3453 int index = 0; | |
3454 // Copy down from superclass | |
3455 if (super.not_null()) { | |
3456 append_interfaces(result, index, super->transitive_interfaces()); | |
3457 } | |
3458 // Copy down from local interfaces' superinterfaces | |
3459 for (int i = 0; i < local_ifs->length(); i++) { | |
3460 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3461 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
3462 } | |
3463 // Finally add local interfaces | |
3464 append_interfaces(result, index, local_ifs()); | |
3465 | |
3466 // Check if duplicates were removed | |
3467 if (index != max_transitive_size) { | |
3468 assert(index < max_transitive_size, "just checking"); | |
3469 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
3470 for (int i = 0; i < index; i++) { | |
3471 oop e = result->obj_at(i); | |
3472 assert(e != NULL, "just checking"); | |
3473 new_result->obj_at_put(i, e); | |
3474 } | |
3475 result = objArrayHandle(THREAD, new_result); | |
3476 } | |
3477 } | |
3478 return result; | |
3479 } | |
3480 | |
3481 | |
3482 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
3483 klassOop super = this_klass->super(); | |
3484 if ((super != NULL) && | |
3485 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
3486 ResourceMark rm(THREAD); | |
3487 Exceptions::fthrow( | |
3488 THREAD_AND_LOCATION, | |
3489 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3490 "class %s cannot access its superclass %s", | |
3491 this_klass->external_name(), | |
3492 instanceKlass::cast(super)->external_name() | |
3493 ); | |
3494 return; | |
3495 } | |
3496 } | |
3497 | |
3498 | |
3499 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
3500 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
3501 int lng = local_interfaces->length(); | |
3502 for (int i = lng - 1; i >= 0; i--) { | |
3503 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3504 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
3505 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
3506 ResourceMark rm(THREAD); | |
3507 Exceptions::fthrow( | |
3508 THREAD_AND_LOCATION, | |
3509 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3510 "class %s cannot access its superinterface %s", | |
3511 this_klass->external_name(), | |
3512 instanceKlass::cast(k)->external_name() | |
3513 ); | |
3514 return; | |
3515 } | |
3516 } | |
3517 } | |
3518 | |
3519 | |
3520 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
3521 objArrayHandle methods (THREAD, this_klass->methods()); | |
3522 int num_methods = methods->length(); | |
3523 | |
3524 // go thru each method and check if it overrides a final method | |
3525 for (int index = 0; index < num_methods; index++) { | |
3526 methodOop m = (methodOop)methods->obj_at(index); | |
3527 | |
3528 // skip private, static and <init> methods | |
3529 if ((!m->is_private()) && | |
3530 (!m->is_static()) && | |
3531 (m->name() != vmSymbols::object_initializer_name())) { | |
3532 | |
3533 symbolOop name = m->name(); | |
3534 symbolOop signature = m->signature(); | |
3535 klassOop k = this_klass->super(); | |
3536 methodOop super_m = NULL; | |
3537 while (k != NULL) { | |
3538 // skip supers that don't have final methods. | |
3539 if (k->klass_part()->has_final_method()) { | |
3540 // lookup a matching method in the super class hierarchy | |
3541 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
3542 if (super_m == NULL) { | |
3543 break; // didn't find any match; get out | |
3544 } | |
3545 | |
3546 if (super_m->is_final() && | |
3547 // matching method in super is final | |
3548 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
3549 super_m->method_holder(), | |
3550 super_m->method_holder(), | |
3551 super_m->access_flags(), false)) | |
3552 // this class can access super final method and therefore override | |
3553 ) { | |
3554 ResourceMark rm(THREAD); | |
3555 Exceptions::fthrow( | |
3556 THREAD_AND_LOCATION, | |
3557 vmSymbolHandles::java_lang_VerifyError(), | |
3558 "class %s overrides final method %s.%s", | |
3559 this_klass->external_name(), | |
3560 name->as_C_string(), | |
3561 signature->as_C_string() | |
3562 ); | |
3563 return; | |
3564 } | |
3565 | |
3566 // continue to look from super_m's holder's super. | |
3567 k = instanceKlass::cast(super_m->method_holder())->super(); | |
3568 continue; | |
3569 } | |
3570 | |
3571 k = k->klass_part()->super(); | |
3572 } | |
3573 } | |
3574 } | |
3575 } | |
3576 | |
3577 | |
3578 // assumes that this_klass is an interface | |
3579 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
3580 assert(this_klass->is_interface(), "not an interface"); | |
3581 objArrayHandle methods (THREAD, this_klass->methods()); | |
3582 int num_methods = methods->length(); | |
3583 | |
3584 for (int index = 0; index < num_methods; index++) { | |
3585 methodOop m = (methodOop)methods->obj_at(index); | |
3586 // if m is static and not the init method, throw a verify error | |
3587 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
3588 ResourceMark rm(THREAD); | |
3589 Exceptions::fthrow( | |
3590 THREAD_AND_LOCATION, | |
3591 vmSymbolHandles::java_lang_VerifyError(), | |
3592 "Illegal static method %s in interface %s", | |
3593 m->name()->as_C_string(), | |
3594 this_klass->external_name() | |
3595 ); | |
3596 return; | |
3597 } | |
3598 } | |
3599 } | |
3600 | |
3601 // utility methods for format checking | |
3602 | |
3603 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
3604 if (!_need_verify) { return; } | |
3605 | |
3606 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
3607 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3608 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3609 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
3610 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3611 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
3612 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3613 | |
3614 if ((is_abstract && is_final) || | |
3615 (is_interface && !is_abstract) || | |
3616 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
3617 (!is_interface && major_gte_15 && is_annotation)) { | |
3618 ResourceMark rm(THREAD); | |
3619 Exceptions::fthrow( | |
3620 THREAD_AND_LOCATION, | |
3621 vmSymbolHandles::java_lang_ClassFormatError(), | |
3622 "Illegal class modifiers in class %s: 0x%X", | |
3623 _class_name->as_C_string(), flags | |
3624 ); | |
3625 return; | |
3626 } | |
3627 } | |
3628 | |
3629 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
3630 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3631 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3632 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3633 | |
3634 return ((is_public && is_protected) || | |
3635 (is_public && is_private) || | |
3636 (is_protected && is_private)); | |
3637 } | |
3638 | |
3639 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
176
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|
3640 u2 max_version = JDK_Version::is_gte_jdk17x_version() ? |
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|
3641 JAVA_MAX_SUPPORTED_VERSION : JAVA_6_VERSION; |
0 | 3642 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
176
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|
3643 (major <= max_version) && |
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|
3644 ((major != max_version) || |
0 | 3645 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
3646 } | |
3647 | |
3648 void ClassFileParser::verify_legal_field_modifiers( | |
3649 jint flags, bool is_interface, TRAPS) { | |
3650 if (!_need_verify) { return; } | |
3651 | |
3652 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3653 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3654 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3655 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3656 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3657 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
3658 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
3659 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3660 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3661 | |
3662 bool is_illegal = false; | |
3663 | |
3664 if (is_interface) { | |
3665 if (!is_public || !is_static || !is_final || is_private || | |
3666 is_protected || is_volatile || is_transient || | |
3667 (major_gte_15 && is_enum)) { | |
3668 is_illegal = true; | |
3669 } | |
3670 } else { // not interface | |
3671 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
3672 is_illegal = true; | |
3673 } | |
3674 } | |
3675 | |
3676 if (is_illegal) { | |
3677 ResourceMark rm(THREAD); | |
3678 Exceptions::fthrow( | |
3679 THREAD_AND_LOCATION, | |
3680 vmSymbolHandles::java_lang_ClassFormatError(), | |
3681 "Illegal field modifiers in class %s: 0x%X", | |
3682 _class_name->as_C_string(), flags); | |
3683 return; | |
3684 } | |
3685 } | |
3686 | |
3687 void ClassFileParser::verify_legal_method_modifiers( | |
3688 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
3689 if (!_need_verify) { return; } | |
3690 | |
3691 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3692 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3693 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3694 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3695 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
3696 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3697 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
3698 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
3699 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
3700 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3701 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
3702 | |
3703 bool is_illegal = false; | |
3704 | |
3705 if (is_interface) { | |
3706 if (!is_abstract || !is_public || is_static || is_final || | |
3707 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
3708 is_illegal = true; | |
3709 } | |
3710 } else { // not interface | |
3711 if (is_initializer) { | |
3712 if (is_static || is_final || is_synchronized || is_native || | |
3713 is_abstract || (major_gte_15 && is_bridge)) { | |
3714 is_illegal = true; | |
3715 } | |
3716 } else { // not initializer | |
3717 if (is_abstract) { | |
3718 if ((is_final || is_native || is_private || is_static || | |
3719 (major_gte_15 && (is_synchronized || is_strict)))) { | |
3720 is_illegal = true; | |
3721 } | |
3722 } | |
3723 if (has_illegal_visibility(flags)) { | |
3724 is_illegal = true; | |
3725 } | |
3726 } | |
3727 } | |
3728 | |
3729 if (is_illegal) { | |
3730 ResourceMark rm(THREAD); | |
3731 Exceptions::fthrow( | |
3732 THREAD_AND_LOCATION, | |
3733 vmSymbolHandles::java_lang_ClassFormatError(), | |
3734 "Method %s in class %s has illegal modifiers: 0x%X", | |
3735 name->as_C_string(), _class_name->as_C_string(), flags); | |
3736 return; | |
3737 } | |
3738 } | |
3739 | |
3740 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
3741 assert(_need_verify, "only called when _need_verify is true"); | |
3742 int i = 0; | |
3743 int count = length >> 2; | |
3744 for (int k=0; k<count; k++) { | |
3745 unsigned char b0 = buffer[i]; | |
3746 unsigned char b1 = buffer[i+1]; | |
3747 unsigned char b2 = buffer[i+2]; | |
3748 unsigned char b3 = buffer[i+3]; | |
3749 // For an unsigned char v, | |
3750 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
3751 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
3752 unsigned char res = b0 | b0 - 1 | | |
3753 b1 | b1 - 1 | | |
3754 b2 | b2 - 1 | | |
3755 b3 | b3 - 1; | |
3756 if (res >= 128) break; | |
3757 i += 4; | |
3758 } | |
3759 for(; i < length; i++) { | |
3760 unsigned short c; | |
3761 // no embedded zeros | |
3762 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3763 if(buffer[i] < 128) { | |
3764 continue; | |
3765 } | |
3766 if ((i + 5) < length) { // see if it's legal supplementary character | |
3767 if (UTF8::is_supplementary_character(&buffer[i])) { | |
3768 c = UTF8::get_supplementary_character(&buffer[i]); | |
3769 i += 5; | |
3770 continue; | |
3771 } | |
3772 } | |
3773 switch (buffer[i] >> 4) { | |
3774 default: break; | |
3775 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
3776 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3777 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
3778 c = (buffer[i] & 0x1F) << 6; | |
3779 i++; | |
3780 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
3781 c += buffer[i] & 0x3F; | |
3782 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
3783 // for classes with major > 47, c must a null or a character in its shortest form | |
3784 break; | |
3785 } | |
3786 } | |
3787 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3788 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
3789 c = (buffer[i] & 0xF) << 12; | |
3790 i += 2; | |
3791 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
3792 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
3793 if (_major_version <= 47 || c >= 0x800) { | |
3794 // for classes with major > 47, c must be in its shortest form | |
3795 break; | |
3796 } | |
3797 } | |
3798 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3799 } // end of switch | |
3800 } // end of for | |
3801 } | |
3802 | |
3803 // Checks if name is a legal class name. | |
3804 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
3805 if (!_need_verify || _relax_verify) { return; } | |
3806 | |
3807 char buf[fixed_buffer_size]; | |
3808 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3809 unsigned int length = name->utf8_length(); | |
3810 bool legal = false; | |
3811 | |
3812 if (length > 0) { | |
3813 char* p; | |
3814 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
3815 p = skip_over_field_signature(bytes, false, length, CHECK); | |
3816 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3817 } else if (_major_version < JAVA_1_5_VERSION) { | |
3818 if (bytes[0] != '<') { | |
3819 p = skip_over_field_name(bytes, true, length); | |
3820 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3821 } | |
3822 } else { | |
3823 // 4900761: relax the constraints based on JSR202 spec | |
3824 // Class names may be drawn from the entire Unicode character set. | |
3825 // Identifiers between '/' must be unqualified names. | |
3826 // The utf8 string has been verified when parsing cpool entries. | |
3827 legal = verify_unqualified_name(bytes, length, LegalClass); | |
3828 } | |
3829 } | |
3830 if (!legal) { | |
3831 ResourceMark rm(THREAD); | |
3832 Exceptions::fthrow( | |
3833 THREAD_AND_LOCATION, | |
3834 vmSymbolHandles::java_lang_ClassFormatError(), | |
3835 "Illegal class name \"%s\" in class file %s", bytes, | |
3836 _class_name->as_C_string() | |
3837 ); | |
3838 return; | |
3839 } | |
3840 } | |
3841 | |
3842 // Checks if name is a legal field name. | |
3843 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
3844 if (!_need_verify || _relax_verify) { return; } | |
3845 | |
3846 char buf[fixed_buffer_size]; | |
3847 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3848 unsigned int length = name->utf8_length(); | |
3849 bool legal = false; | |
3850 | |
3851 if (length > 0) { | |
3852 if (_major_version < JAVA_1_5_VERSION) { | |
3853 if (bytes[0] != '<') { | |
3854 char* p = skip_over_field_name(bytes, false, length); | |
3855 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3856 } | |
3857 } else { | |
3858 // 4881221: relax the constraints based on JSR202 spec | |
3859 legal = verify_unqualified_name(bytes, length, LegalField); | |
3860 } | |
3861 } | |
3862 | |
3863 if (!legal) { | |
3864 ResourceMark rm(THREAD); | |
3865 Exceptions::fthrow( | |
3866 THREAD_AND_LOCATION, | |
3867 vmSymbolHandles::java_lang_ClassFormatError(), | |
3868 "Illegal field name \"%s\" in class %s", bytes, | |
3869 _class_name->as_C_string() | |
3870 ); | |
3871 return; | |
3872 } | |
3873 } | |
3874 | |
3875 // Checks if name is a legal method name. | |
3876 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
3877 if (!_need_verify || _relax_verify) { return; } | |
3878 | |
3879 assert(!name.is_null(), "method name is null"); | |
3880 char buf[fixed_buffer_size]; | |
3881 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3882 unsigned int length = name->utf8_length(); | |
3883 bool legal = false; | |
3884 | |
3885 if (length > 0) { | |
3886 if (bytes[0] == '<') { | |
3887 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
3888 legal = true; | |
3889 } | |
3890 } else if (_major_version < JAVA_1_5_VERSION) { | |
3891 char* p; | |
3892 p = skip_over_field_name(bytes, false, length); | |
3893 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3894 } else { | |
3895 // 4881221: relax the constraints based on JSR202 spec | |
3896 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
3897 } | |
3898 } | |
3899 | |
3900 if (!legal) { | |
3901 ResourceMark rm(THREAD); | |
3902 Exceptions::fthrow( | |
3903 THREAD_AND_LOCATION, | |
3904 vmSymbolHandles::java_lang_ClassFormatError(), | |
3905 "Illegal method name \"%s\" in class %s", bytes, | |
3906 _class_name->as_C_string() | |
3907 ); | |
3908 return; | |
3909 } | |
3910 } | |
3911 | |
3912 | |
3913 // Checks if signature is a legal field signature. | |
3914 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
3915 if (!_need_verify) { return; } | |
3916 | |
3917 char buf[fixed_buffer_size]; | |
3918 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3919 unsigned int length = signature->utf8_length(); | |
3920 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
3921 | |
3922 if (p == NULL || (p - bytes) != (int)length) { | |
3923 ResourceMark rm(THREAD); | |
3924 Exceptions::fthrow( | |
3925 THREAD_AND_LOCATION, | |
3926 vmSymbolHandles::java_lang_ClassFormatError(), | |
3927 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
3928 name->as_C_string(), _class_name->as_C_string(), bytes | |
3929 ); | |
3930 return; | |
3931 } | |
3932 } | |
3933 | |
3934 // Checks if signature is a legal method signature. | |
3935 // Returns number of parameters | |
3936 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
3937 if (!_need_verify) { | |
3938 // make sure caller's args_size will be less than 0 even for non-static | |
3939 // method so it will be recomputed in compute_size_of_parameters(). | |
3940 return -2; | |
3941 } | |
3942 | |
3943 unsigned int args_size = 0; | |
3944 char buf[fixed_buffer_size]; | |
3945 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3946 unsigned int length = signature->utf8_length(); | |
3947 char* nextp; | |
3948 | |
3949 // The first character must be a '(' | |
3950 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
3951 length--; | |
3952 // Skip over legal field signatures | |
3953 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
3954 while ((length > 0) && (nextp != NULL)) { | |
3955 args_size++; | |
3956 if (p[0] == 'J' || p[0] == 'D') { | |
3957 args_size++; | |
3958 } | |
3959 length -= nextp - p; | |
3960 p = nextp; | |
3961 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
3962 } | |
3963 // The first non-signature thing better be a ')' | |
3964 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
3965 length--; | |
3966 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
3967 // All internal methods must return void | |
3968 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
3969 return args_size; | |
3970 } | |
3971 } else { | |
3972 // Now we better just have a return value | |
3973 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
3974 if (nextp && ((int)length == (nextp - p))) { | |
3975 return args_size; | |
3976 } | |
3977 } | |
3978 } | |
3979 } | |
3980 // Report error | |
3981 ResourceMark rm(THREAD); | |
3982 Exceptions::fthrow( | |
3983 THREAD_AND_LOCATION, | |
3984 vmSymbolHandles::java_lang_ClassFormatError(), | |
3985 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
3986 name->as_C_string(), _class_name->as_C_string(), p | |
3987 ); | |
3988 return 0; | |
3989 } | |
3990 | |
3991 | |
3992 // Unqualified names may not contain the characters '.', ';', or '/'. | |
3993 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
3994 // Note that method names may not be <init> or <clinit> in this method. | |
3995 // Because these names have been checked as special cases before calling this method | |
3996 // in verify_legal_method_name. | |
3997 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
3998 jchar ch; | |
3999 | |
4000 for (char* p = name; p != name + length; ) { | |
4001 ch = *p; | |
4002 if (ch < 128) { | |
4003 p++; | |
4004 if (ch == '.' || ch == ';') { | |
4005 return false; // do not permit '.' or ';' | |
4006 } | |
4007 if (type != LegalClass && ch == '/') { | |
4008 return false; // do not permit '/' unless it's class name | |
4009 } | |
4010 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
4011 return false; // do not permit '<' or '>' in method names | |
4012 } | |
4013 } else { | |
4014 char* tmp_p = UTF8::next(p, &ch); | |
4015 p = tmp_p; | |
4016 } | |
4017 } | |
4018 return true; | |
4019 } | |
4020 | |
4021 | |
4022 // Take pointer to a string. Skip over the longest part of the string that could | |
4023 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
4024 // Return a pointer to just past the fieldname. | |
4025 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
4026 // being true, we saw consecutive slashes (meaning we were looking for a | |
4027 // qualified path but found something that was badly-formed). | |
4028 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
4029 char* p; | |
4030 jchar ch; | |
4031 jboolean last_is_slash = false; | |
4032 jboolean not_first_ch = false; | |
4033 | |
4034 for (p = name; p != name + length; not_first_ch = true) { | |
4035 char* old_p = p; | |
4036 ch = *p; | |
4037 if (ch < 128) { | |
4038 p++; | |
4039 // quick check for ascii | |
4040 if ((ch >= 'a' && ch <= 'z') || | |
4041 (ch >= 'A' && ch <= 'Z') || | |
4042 (ch == '_' || ch == '$') || | |
4043 (not_first_ch && ch >= '0' && ch <= '9')) { | |
4044 last_is_slash = false; | |
4045 continue; | |
4046 } | |
4047 if (slash_ok && ch == '/') { | |
4048 if (last_is_slash) { | |
4049 return NULL; // Don't permit consecutive slashes | |
4050 } | |
4051 last_is_slash = true; | |
4052 continue; | |
4053 } | |
4054 } else { | |
4055 jint unicode_ch; | |
4056 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
4057 p = tmp_p; | |
4058 last_is_slash = false; | |
4059 // Check if ch is Java identifier start or is Java identifier part | |
4060 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
4061 EXCEPTION_MARK; | |
4062 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass()); | |
4063 | |
4064 // return value | |
4065 JavaValue result(T_BOOLEAN); | |
4066 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
4067 JavaCallArguments args; | |
4068 args.push_int(unicode_ch); | |
4069 | |
4070 // public static boolean isJavaIdentifierStart(char ch); | |
4071 JavaCalls::call_static(&result, | |
4072 klass, | |
4073 vmSymbolHandles::isJavaIdentifierStart_name(), | |
4074 vmSymbolHandles::int_bool_signature(), | |
4075 &args, | |
4076 THREAD); | |
4077 | |
4078 if (HAS_PENDING_EXCEPTION) { | |
4079 CLEAR_PENDING_EXCEPTION; | |
4080 return 0; | |
4081 } | |
4082 if (result.get_jboolean()) { | |
4083 continue; | |
4084 } | |
4085 | |
4086 if (not_first_ch) { | |
4087 // public static boolean isJavaIdentifierPart(char ch); | |
4088 JavaCalls::call_static(&result, | |
4089 klass, | |
4090 vmSymbolHandles::isJavaIdentifierPart_name(), | |
4091 vmSymbolHandles::int_bool_signature(), | |
4092 &args, | |
4093 THREAD); | |
4094 | |
4095 if (HAS_PENDING_EXCEPTION) { | |
4096 CLEAR_PENDING_EXCEPTION; | |
4097 return 0; | |
4098 } | |
4099 | |
4100 if (result.get_jboolean()) { | |
4101 continue; | |
4102 } | |
4103 } | |
4104 } | |
4105 return (not_first_ch) ? old_p : NULL; | |
4106 } | |
4107 return (not_first_ch) ? p : NULL; | |
4108 } | |
4109 | |
4110 | |
4111 // Take pointer to a string. Skip over the longest part of the string that could | |
4112 // be taken as a field signature. Allow "void" if void_ok. | |
4113 // Return a pointer to just past the signature. | |
4114 // Return NULL if no legal signature is found. | |
4115 char* ClassFileParser::skip_over_field_signature(char* signature, | |
4116 bool void_ok, | |
4117 unsigned int length, | |
4118 TRAPS) { | |
4119 unsigned int array_dim = 0; | |
4120 while (length > 0) { | |
4121 switch (signature[0]) { | |
4122 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
4123 case JVM_SIGNATURE_BOOLEAN: | |
4124 case JVM_SIGNATURE_BYTE: | |
4125 case JVM_SIGNATURE_CHAR: | |
4126 case JVM_SIGNATURE_SHORT: | |
4127 case JVM_SIGNATURE_INT: | |
4128 case JVM_SIGNATURE_FLOAT: | |
4129 case JVM_SIGNATURE_LONG: | |
4130 case JVM_SIGNATURE_DOUBLE: | |
4131 return signature + 1; | |
4132 case JVM_SIGNATURE_CLASS: { | |
4133 if (_major_version < JAVA_1_5_VERSION) { | |
4134 // Skip over the class name if one is there | |
4135 char* p = skip_over_field_name(signature + 1, true, --length); | |
4136 | |
4137 // The next character better be a semicolon | |
4138 if (p && (p - signature) > 1 && p[0] == ';') { | |
4139 return p + 1; | |
4140 } | |
4141 } else { | |
4142 // 4900761: For class version > 48, any unicode is allowed in class name. | |
4143 length--; | |
4144 signature++; | |
4145 while (length > 0 && signature[0] != ';') { | |
4146 if (signature[0] == '.') { | |
4147 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
4148 } | |
4149 length--; | |
4150 signature++; | |
4151 } | |
4152 if (signature[0] == ';') { return signature + 1; } | |
4153 } | |
4154 | |
4155 return NULL; | |
4156 } | |
4157 case JVM_SIGNATURE_ARRAY: | |
4158 array_dim++; | |
4159 if (array_dim > 255) { | |
4160 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
4161 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
4162 } | |
4163 // The rest of what's there better be a legal signature | |
4164 signature++; | |
4165 length--; | |
4166 void_ok = false; | |
4167 break; | |
4168 | |
4169 default: | |
4170 return NULL; | |
4171 } | |
4172 } | |
4173 return NULL; | |
4174 } |