Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/classFileParser.cpp @ 474:7a018855d2f0
6779339: turn off LinkWellKnownClasses by default pending further testing
Summary: temporarily turn off LinkWellKnownClasses optimization
Reviewed-by: never, kvn
author | jrose |
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date | Mon, 08 Dec 2008 17:15:02 -0800 |
parents | a45484ea312d |
children | 0af8b0718fc9 |
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 |
474
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584 if (LinkWellKnownClasses) // my super type is well known to me |
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585 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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586 } |
0 | 587 |
588 if (!Klass::cast(interf())->is_interface()) { | |
589 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
590 } | |
591 interfaces->obj_at_put(index, interf()); | |
592 } | |
593 | |
594 if (!_need_verify || length <= 1) { | |
595 return interfaces; | |
596 } | |
597 | |
598 // Check if there's any duplicates in interfaces | |
599 ResourceMark rm(THREAD); | |
600 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
601 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
602 initialize_hashtable(interface_names); | |
603 bool dup = false; | |
604 { | |
605 debug_only(No_Safepoint_Verifier nsv;) | |
606 for (index = 0; index < length; index++) { | |
607 klassOop k = (klassOop)interfaces->obj_at(index); | |
608 symbolOop name = instanceKlass::cast(k)->name(); | |
609 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
610 if (!put_after_lookup(name, NULL, interface_names)) { | |
611 dup = true; | |
612 break; | |
613 } | |
614 } | |
615 } | |
616 if (dup) { | |
617 classfile_parse_error("Duplicate interface name in class file %s", | |
618 CHECK_(nullHandle)); | |
619 } | |
620 | |
621 return interfaces; | |
622 } | |
623 | |
624 | |
625 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
626 // Make sure the constant pool entry is of a type appropriate to this field | |
627 guarantee_property( | |
628 (constantvalue_index > 0 && | |
629 constantvalue_index < cp->length()), | |
630 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
631 constantvalue_index, CHECK); | |
632 constantTag value_type = cp->tag_at(constantvalue_index); | |
633 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
634 case T_LONG: | |
635 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
636 break; | |
637 case T_FLOAT: | |
638 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
639 break; | |
640 case T_DOUBLE: | |
641 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
642 break; | |
643 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
644 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
645 break; | |
646 case T_OBJECT: | |
647 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18) | |
648 && (value_type.is_string() || value_type.is_unresolved_string())), | |
649 "Bad string initial value in class file %s", CHECK); | |
650 break; | |
651 default: | |
652 classfile_parse_error( | |
653 "Unable to set initial value %u in class file %s", | |
654 constantvalue_index, CHECK); | |
655 } | |
656 } | |
657 | |
658 | |
659 // Parse attributes for a field. | |
660 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
661 u2 attributes_count, | |
662 bool is_static, u2 signature_index, | |
663 u2* constantvalue_index_addr, | |
664 bool* is_synthetic_addr, | |
665 u2* generic_signature_index_addr, | |
666 typeArrayHandle* field_annotations, | |
667 TRAPS) { | |
668 ClassFileStream* cfs = stream(); | |
669 assert(attributes_count > 0, "length should be greater than 0"); | |
670 u2 constantvalue_index = 0; | |
671 u2 generic_signature_index = 0; | |
672 bool is_synthetic = false; | |
673 u1* runtime_visible_annotations = NULL; | |
674 int runtime_visible_annotations_length = 0; | |
675 u1* runtime_invisible_annotations = NULL; | |
676 int runtime_invisible_annotations_length = 0; | |
677 while (attributes_count--) { | |
678 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
679 u2 attribute_name_index = cfs->get_u2_fast(); | |
680 u4 attribute_length = cfs->get_u4_fast(); | |
681 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
682 cp->tag_at(attribute_name_index).is_utf8(), | |
683 "Invalid field attribute index %u in class file %s", | |
684 attribute_name_index, | |
685 CHECK); | |
686 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
687 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
688 // ignore if non-static | |
689 if (constantvalue_index != 0) { | |
690 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
691 } | |
692 check_property( | |
693 attribute_length == 2, | |
694 "Invalid ConstantValue field attribute length %u in class file %s", | |
695 attribute_length, CHECK); | |
696 constantvalue_index = cfs->get_u2(CHECK); | |
697 if (_need_verify) { | |
698 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
699 } | |
700 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
701 if (attribute_length != 0) { | |
702 classfile_parse_error( | |
703 "Invalid Synthetic field attribute length %u in class file %s", | |
704 attribute_length, CHECK); | |
705 } | |
706 is_synthetic = true; | |
707 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
708 if (attribute_length != 0) { | |
709 classfile_parse_error( | |
710 "Invalid Deprecated field attribute length %u in class file %s", | |
711 attribute_length, CHECK); | |
712 } | |
713 } else if (_major_version >= JAVA_1_5_VERSION) { | |
714 if (attribute_name == vmSymbols::tag_signature()) { | |
715 if (attribute_length != 2) { | |
716 classfile_parse_error( | |
717 "Wrong size %u for field's Signature attribute in class file %s", | |
718 attribute_length, CHECK); | |
719 } | |
720 generic_signature_index = cfs->get_u2(CHECK); | |
721 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
722 runtime_visible_annotations_length = attribute_length; | |
723 runtime_visible_annotations = cfs->get_u1_buffer(); | |
724 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
725 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
726 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
727 runtime_invisible_annotations_length = attribute_length; | |
728 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
729 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
730 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
731 } else { | |
732 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
733 } | |
734 } else { | |
735 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
736 } | |
737 } | |
738 | |
739 *constantvalue_index_addr = constantvalue_index; | |
740 *is_synthetic_addr = is_synthetic; | |
741 *generic_signature_index_addr = generic_signature_index; | |
742 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
743 runtime_visible_annotations_length, | |
744 runtime_invisible_annotations, | |
745 runtime_invisible_annotations_length, | |
746 CHECK); | |
747 return; | |
748 } | |
749 | |
750 | |
751 // Field allocation types. Used for computing field offsets. | |
752 | |
753 enum FieldAllocationType { | |
754 STATIC_OOP, // Oops | |
755 STATIC_BYTE, // Boolean, Byte, char | |
756 STATIC_SHORT, // shorts | |
757 STATIC_WORD, // ints | |
758 STATIC_DOUBLE, // long or double | |
759 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
760 NONSTATIC_OOP, | |
761 NONSTATIC_BYTE, | |
762 NONSTATIC_SHORT, | |
763 NONSTATIC_WORD, | |
764 NONSTATIC_DOUBLE, | |
765 NONSTATIC_ALIGNED_DOUBLE | |
766 }; | |
767 | |
768 | |
769 struct FieldAllocationCount { | |
770 int static_oop_count; | |
771 int static_byte_count; | |
772 int static_short_count; | |
773 int static_word_count; | |
774 int static_double_count; | |
775 int nonstatic_oop_count; | |
776 int nonstatic_byte_count; | |
777 int nonstatic_short_count; | |
778 int nonstatic_word_count; | |
779 int nonstatic_double_count; | |
780 }; | |
781 | |
782 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
783 struct FieldAllocationCount *fac, | |
784 objArrayHandle* fields_annotations, TRAPS) { | |
785 ClassFileStream* cfs = stream(); | |
786 typeArrayHandle nullHandle; | |
787 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
788 u2 length = cfs->get_u2_fast(); | |
789 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
790 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
791 typeArrayHandle fields(THREAD, new_fields); | |
792 | |
793 int index = 0; | |
794 typeArrayHandle field_annotations; | |
795 for (int n = 0; n < length; n++) { | |
796 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
797 | |
798 AccessFlags access_flags; | |
799 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
800 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
801 access_flags.set_flags(flags); | |
802 | |
803 u2 name_index = cfs->get_u2_fast(); | |
804 int cp_size = cp->length(); | |
805 check_property( | |
806 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
807 "Invalid constant pool index %u for field name in class file %s", | |
808 name_index, CHECK_(nullHandle)); | |
809 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
810 verify_legal_field_name(name, CHECK_(nullHandle)); | |
811 | |
812 u2 signature_index = cfs->get_u2_fast(); | |
813 check_property( | |
814 valid_cp_range(signature_index, cp_size) && | |
815 cp->tag_at(signature_index).is_utf8(), | |
816 "Invalid constant pool index %u for field signature in class file %s", | |
817 signature_index, CHECK_(nullHandle)); | |
818 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
819 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
820 | |
821 u2 constantvalue_index = 0; | |
822 bool is_synthetic = false; | |
823 u2 generic_signature_index = 0; | |
824 bool is_static = access_flags.is_static(); | |
825 | |
826 u2 attributes_count = cfs->get_u2_fast(); | |
827 if (attributes_count > 0) { | |
828 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
829 &constantvalue_index, &is_synthetic, | |
830 &generic_signature_index, &field_annotations, | |
831 CHECK_(nullHandle)); | |
832 if (field_annotations.not_null()) { | |
833 if (fields_annotations->is_null()) { | |
834 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
835 *fields_annotations = objArrayHandle(THREAD, md); | |
836 } | |
837 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
838 } | |
839 if (is_synthetic) { | |
840 access_flags.set_is_synthetic(); | |
841 } | |
842 } | |
843 | |
844 fields->short_at_put(index++, access_flags.as_short()); | |
845 fields->short_at_put(index++, name_index); | |
846 fields->short_at_put(index++, signature_index); | |
847 fields->short_at_put(index++, constantvalue_index); | |
848 | |
849 // Remember how many oops we encountered and compute allocation type | |
850 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
851 FieldAllocationType atype; | |
852 if ( is_static ) { | |
853 switch ( type ) { | |
854 case T_BOOLEAN: | |
855 case T_BYTE: | |
856 fac->static_byte_count++; | |
857 atype = STATIC_BYTE; | |
858 break; | |
859 case T_LONG: | |
860 case T_DOUBLE: | |
861 if (Universe::field_type_should_be_aligned(type)) { | |
862 atype = STATIC_ALIGNED_DOUBLE; | |
863 } else { | |
864 atype = STATIC_DOUBLE; | |
865 } | |
866 fac->static_double_count++; | |
867 break; | |
868 case T_CHAR: | |
869 case T_SHORT: | |
870 fac->static_short_count++; | |
871 atype = STATIC_SHORT; | |
872 break; | |
873 case T_FLOAT: | |
874 case T_INT: | |
875 fac->static_word_count++; | |
876 atype = STATIC_WORD; | |
877 break; | |
878 case T_ARRAY: | |
879 case T_OBJECT: | |
880 fac->static_oop_count++; | |
881 atype = STATIC_OOP; | |
882 break; | |
883 case T_ADDRESS: | |
884 case T_VOID: | |
885 default: | |
886 assert(0, "bad field type"); | |
887 } | |
888 } else { | |
889 switch ( type ) { | |
890 case T_BOOLEAN: | |
891 case T_BYTE: | |
892 fac->nonstatic_byte_count++; | |
893 atype = NONSTATIC_BYTE; | |
894 break; | |
895 case T_LONG: | |
896 case T_DOUBLE: | |
897 if (Universe::field_type_should_be_aligned(type)) { | |
898 atype = NONSTATIC_ALIGNED_DOUBLE; | |
899 } else { | |
900 atype = NONSTATIC_DOUBLE; | |
901 } | |
902 fac->nonstatic_double_count++; | |
903 break; | |
904 case T_CHAR: | |
905 case T_SHORT: | |
906 fac->nonstatic_short_count++; | |
907 atype = NONSTATIC_SHORT; | |
908 break; | |
909 case T_FLOAT: | |
910 case T_INT: | |
911 fac->nonstatic_word_count++; | |
912 atype = NONSTATIC_WORD; | |
913 break; | |
914 case T_ARRAY: | |
915 case T_OBJECT: | |
916 fac->nonstatic_oop_count++; | |
917 atype = NONSTATIC_OOP; | |
918 break; | |
919 case T_ADDRESS: | |
920 case T_VOID: | |
921 default: | |
922 assert(0, "bad field type"); | |
923 } | |
924 } | |
925 | |
926 // The correct offset is computed later (all oop fields will be located together) | |
927 // We temporarily store the allocation type in the offset field | |
928 fields->short_at_put(index++, atype); | |
929 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
930 fields->short_at_put(index++, generic_signature_index); | |
931 } | |
932 | |
933 if (_need_verify && length > 1) { | |
934 // Check duplicated fields | |
935 ResourceMark rm(THREAD); | |
936 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
937 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
938 initialize_hashtable(names_and_sigs); | |
939 bool dup = false; | |
940 { | |
941 debug_only(No_Safepoint_Verifier nsv;) | |
942 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
943 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
944 symbolOop name = cp->symbol_at(name_index); | |
945 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
946 symbolOop sig = cp->symbol_at(sig_index); | |
947 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
948 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
949 dup = true; | |
950 break; | |
951 } | |
952 } | |
953 } | |
954 if (dup) { | |
955 classfile_parse_error("Duplicate field name&signature in class file %s", | |
956 CHECK_(nullHandle)); | |
957 } | |
958 } | |
959 | |
960 return fields; | |
961 } | |
962 | |
963 | |
964 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
965 while (length-- > 0) { | |
966 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
967 } | |
968 } | |
969 | |
970 | |
971 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
972 u4 exception_table_length, | |
973 constantPoolHandle cp, | |
974 TRAPS) { | |
975 ClassFileStream* cfs = stream(); | |
976 typeArrayHandle nullHandle; | |
977 | |
978 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
979 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
980 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
981 | |
982 int index = 0; | |
983 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
984 for (unsigned int i = 0; i < exception_table_length; i++) { | |
985 u2 start_pc = cfs->get_u2_fast(); | |
986 u2 end_pc = cfs->get_u2_fast(); | |
987 u2 handler_pc = cfs->get_u2_fast(); | |
988 u2 catch_type_index = cfs->get_u2_fast(); | |
989 // Will check legal target after parsing code array in verifier. | |
990 if (_need_verify) { | |
991 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
992 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
993 guarantee_property(handler_pc < code_length, | |
994 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
995 if (catch_type_index != 0) { | |
996 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
431
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changeset
|
997 is_klass_reference(cp, catch_type_index), |
0 | 998 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
999 } | |
1000 } | |
1001 exception_handlers->int_at_put(index++, start_pc); | |
1002 exception_handlers->int_at_put(index++, end_pc); | |
1003 exception_handlers->int_at_put(index++, handler_pc); | |
1004 exception_handlers->int_at_put(index++, catch_type_index); | |
1005 } | |
1006 return exception_handlers; | |
1007 } | |
1008 | |
1009 void ClassFileParser::parse_linenumber_table( | |
1010 u4 code_attribute_length, u4 code_length, | |
1011 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
1012 ClassFileStream* cfs = stream(); | |
1013 unsigned int num_entries = cfs->get_u2(CHECK); | |
1014 | |
1015 // Each entry is a u2 start_pc, and a u2 line_number | |
1016 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
1017 | |
1018 // Verify line number attribute and table length | |
1019 check_property( | |
1020 code_attribute_length == sizeof(u2) + length_in_bytes, | |
1021 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
1022 | |
1023 cfs->guarantee_more(length_in_bytes, CHECK); | |
1024 | |
1025 if ((*write_stream) == NULL) { | |
1026 if (length_in_bytes > fixed_buffer_size) { | |
1027 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
1028 } else { | |
1029 (*write_stream) = new CompressedLineNumberWriteStream( | |
1030 linenumbertable_buffer, fixed_buffer_size); | |
1031 } | |
1032 } | |
1033 | |
1034 while (num_entries-- > 0) { | |
1035 u2 bci = cfs->get_u2_fast(); // start_pc | |
1036 u2 line = cfs->get_u2_fast(); // line_number | |
1037 guarantee_property(bci < code_length, | |
1038 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
1039 (*write_stream)->write_pair(bci, line); | |
1040 } | |
1041 } | |
1042 | |
1043 | |
1044 // Class file LocalVariableTable elements. | |
1045 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
1046 public: | |
1047 u2 start_bci; | |
1048 u2 length; | |
1049 u2 name_cp_index; | |
1050 u2 descriptor_cp_index; | |
1051 u2 slot; | |
1052 }; | |
1053 | |
1054 | |
1055 class LVT_Hash: public CHeapObj { | |
1056 public: | |
1057 LocalVariableTableElement *_elem; // element | |
1058 LVT_Hash* _next; // Next entry in hash table | |
1059 }; | |
1060 | |
1061 unsigned int hash(LocalVariableTableElement *elem) { | |
1062 unsigned int raw_hash = elem->start_bci; | |
1063 | |
1064 raw_hash = elem->length + raw_hash * 37; | |
1065 raw_hash = elem->name_cp_index + raw_hash * 37; | |
1066 raw_hash = elem->slot + raw_hash * 37; | |
1067 | |
1068 return raw_hash % HASH_ROW_SIZE; | |
1069 } | |
1070 | |
1071 void initialize_hashtable(LVT_Hash** table) { | |
1072 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1073 table[i] = NULL; | |
1074 } | |
1075 } | |
1076 | |
1077 void clear_hashtable(LVT_Hash** table) { | |
1078 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1079 LVT_Hash* current = table[i]; | |
1080 LVT_Hash* next; | |
1081 while (current != NULL) { | |
1082 next = current->_next; | |
1083 current->_next = NULL; | |
1084 delete(current); | |
1085 current = next; | |
1086 } | |
1087 table[i] = NULL; | |
1088 } | |
1089 } | |
1090 | |
1091 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
1092 LVT_Hash* entry = table[index]; | |
1093 | |
1094 /* | |
1095 * 3-tuple start_bci/length/slot has to be unique key, | |
1096 * so the following comparison seems to be redundant: | |
1097 * && elem->name_cp_index == entry->_elem->name_cp_index | |
1098 */ | |
1099 while (entry != NULL) { | |
1100 if (elem->start_bci == entry->_elem->start_bci | |
1101 && elem->length == entry->_elem->length | |
1102 && elem->name_cp_index == entry->_elem->name_cp_index | |
1103 && elem->slot == entry->_elem->slot | |
1104 ) { | |
1105 return entry; | |
1106 } | |
1107 entry = entry->_next; | |
1108 } | |
1109 return NULL; | |
1110 } | |
1111 | |
1112 // Return false if the local variable is found in table. | |
1113 // Return true if no duplicate is found. | |
1114 // And local variable is added as a new entry in table. | |
1115 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
1116 // First lookup for duplicates | |
1117 int index = hash(elem); | |
1118 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
1119 | |
1120 if (entry != NULL) { | |
1121 return false; | |
1122 } | |
1123 // No duplicate is found, allocate a new entry and fill it. | |
1124 if ((entry = new LVT_Hash()) == NULL) { | |
1125 return false; | |
1126 } | |
1127 entry->_elem = elem; | |
1128 | |
1129 // Insert into hash table | |
1130 entry->_next = table[index]; | |
1131 table[index] = entry; | |
1132 | |
1133 return true; | |
1134 } | |
1135 | |
1136 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
1137 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
1138 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
1139 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
1140 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
1141 lvt->signature_cp_index = 0; | |
1142 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
1143 } | |
1144 | |
1145 // Function is used to parse both attributes: | |
1146 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
1147 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
1148 u2 max_locals, | |
1149 u4 code_attribute_length, | |
1150 constantPoolHandle cp, | |
1151 u2* localvariable_table_length, | |
1152 bool isLVTT, | |
1153 TRAPS) { | |
1154 ClassFileStream* cfs = stream(); | |
1155 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
1156 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
1157 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
1158 // Verify local variable table attribute has right length | |
1159 if (_need_verify) { | |
1160 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
1161 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
1162 } | |
1163 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
1164 assert(localvariable_table_start != NULL, "null local variable table"); | |
1165 if (!_need_verify) { | |
1166 cfs->skip_u2_fast(size); | |
1167 } else { | |
1168 cfs->guarantee_more(size * 2, CHECK_NULL); | |
1169 for(int i = 0; i < (*localvariable_table_length); i++) { | |
1170 u2 start_pc = cfs->get_u2_fast(); | |
1171 u2 length = cfs->get_u2_fast(); | |
1172 u2 name_index = cfs->get_u2_fast(); | |
1173 u2 descriptor_index = cfs->get_u2_fast(); | |
1174 u2 index = cfs->get_u2_fast(); | |
1175 // Assign to a u4 to avoid overflow | |
1176 u4 end_pc = (u4)start_pc + (u4)length; | |
1177 | |
1178 if (start_pc >= code_length) { | |
1179 classfile_parse_error( | |
1180 "Invalid start_pc %u in %s in class file %s", | |
1181 start_pc, tbl_name, CHECK_NULL); | |
1182 } | |
1183 if (end_pc > code_length) { | |
1184 classfile_parse_error( | |
1185 "Invalid length %u in %s in class file %s", | |
1186 length, tbl_name, CHECK_NULL); | |
1187 } | |
1188 int cp_size = cp->length(); | |
1189 guarantee_property( | |
1190 valid_cp_range(name_index, cp_size) && | |
1191 cp->tag_at(name_index).is_utf8(), | |
1192 "Name index %u in %s has bad constant type in class file %s", | |
1193 name_index, tbl_name, CHECK_NULL); | |
1194 guarantee_property( | |
1195 valid_cp_range(descriptor_index, cp_size) && | |
1196 cp->tag_at(descriptor_index).is_utf8(), | |
1197 "Signature index %u in %s has bad constant type in class file %s", | |
1198 descriptor_index, tbl_name, CHECK_NULL); | |
1199 | |
1200 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1201 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
1202 verify_legal_field_name(name, CHECK_NULL); | |
1203 u2 extra_slot = 0; | |
1204 if (!isLVTT) { | |
1205 verify_legal_field_signature(name, sig, CHECK_NULL); | |
1206 | |
1207 // 4894874: check special cases for double and long local variables | |
1208 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
1209 sig() == vmSymbols::type_signature(T_LONG)) { | |
1210 extra_slot = 1; | |
1211 } | |
1212 } | |
1213 guarantee_property((index + extra_slot) < max_locals, | |
1214 "Invalid index %u in %s in class file %s", | |
1215 index, tbl_name, CHECK_NULL); | |
1216 } | |
1217 } | |
1218 return localvariable_table_start; | |
1219 } | |
1220 | |
1221 | |
1222 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
1223 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
1224 ClassFileStream* cfs = stream(); | |
1225 u2 index = 0; // index in the array with long/double occupying two slots | |
1226 u4 i1 = *u1_index; | |
1227 u4 i2 = *u2_index + 1; | |
1228 for(int i = 0; i < array_length; i++) { | |
1229 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
1230 index++; | |
1231 if (tag == ITEM_Long || tag == ITEM_Double) { | |
1232 index++; | |
1233 } else if (tag == ITEM_Object) { | |
1234 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
1235 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
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1236 is_klass_reference(cp, class_index), |
0 | 1237 "Bad class index %u in StackMap in class file %s", |
1238 class_index, CHECK); | |
1239 } else if (tag == ITEM_Uninitialized) { | |
1240 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
1241 guarantee_property( | |
1242 offset < code_length, | |
1243 "Bad uninitialized type offset %u in StackMap in class file %s", | |
1244 offset, CHECK); | |
1245 } else { | |
1246 guarantee_property( | |
1247 tag <= (u1)ITEM_Uninitialized, | |
1248 "Unknown variable type %u in StackMap in class file %s", | |
1249 tag, CHECK); | |
1250 } | |
1251 } | |
1252 u2_array[*u2_index] = index; | |
1253 *u1_index = i1; | |
1254 *u2_index = i2; | |
1255 } | |
1256 | |
1257 typeArrayOop ClassFileParser::parse_stackmap_table( | |
1258 u4 code_attribute_length, TRAPS) { | |
1259 if (code_attribute_length == 0) | |
1260 return NULL; | |
1261 | |
1262 ClassFileStream* cfs = stream(); | |
1263 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
1264 assert(stackmap_table_start != NULL, "null stackmap table"); | |
1265 | |
1266 // check code_attribute_length first | |
1267 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
1268 | |
1269 if (!_need_verify && !DumpSharedSpaces) { | |
1270 return NULL; | |
1271 } | |
1272 | |
1273 typeArrayOop stackmap_data = | |
1274 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
1275 | |
1276 stackmap_data->set_length(code_attribute_length); | |
1277 memcpy((void*)stackmap_data->byte_at_addr(0), | |
1278 (void*)stackmap_table_start, code_attribute_length); | |
1279 return stackmap_data; | |
1280 } | |
1281 | |
1282 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
1283 u4 method_attribute_length, | |
1284 constantPoolHandle cp, TRAPS) { | |
1285 ClassFileStream* cfs = stream(); | |
1286 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
1287 *checked_exceptions_length = cfs->get_u2_fast(); | |
1288 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1289 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
1290 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
1291 if (!_need_verify) { | |
1292 cfs->skip_u2_fast(size); | |
1293 } else { | |
1294 // Verify each value in the checked exception table | |
1295 u2 checked_exception; | |
1296 u2 len = *checked_exceptions_length; | |
1297 cfs->guarantee_more(2 * len, CHECK_NULL); | |
1298 for (int i = 0; i < len; i++) { | |
1299 checked_exception = cfs->get_u2_fast(); | |
1300 check_property( | |
1301 valid_cp_range(checked_exception, cp->length()) && | |
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1302 is_klass_reference(cp, checked_exception), |
0 | 1303 "Exception name has bad type at constant pool %u in class file %s", |
1304 checked_exception, CHECK_NULL); | |
1305 } | |
1306 } | |
1307 // check exceptions attribute length | |
1308 if (_need_verify) { | |
1309 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
1310 sizeof(u2) * size), | |
1311 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
1312 } | |
1313 return checked_exceptions_start; | |
1314 } | |
1315 | |
1316 | |
1317 #define MAX_ARGS_SIZE 255 | |
1318 #define MAX_CODE_SIZE 65535 | |
1319 #define INITIAL_MAX_LVT_NUMBER 256 | |
1320 | |
1321 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
1322 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
1323 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
1324 // entire method attribute is parsed. | |
1325 // | |
1326 // The promoted_flags parameter is used to pass relevant access_flags | |
1327 // from the method back up to the containing klass. These flag values | |
1328 // are added to klass's access_flags. | |
1329 | |
1330 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
1331 AccessFlags *promoted_flags, | |
1332 typeArrayHandle* method_annotations, | |
1333 typeArrayHandle* method_parameter_annotations, | |
1334 typeArrayHandle* method_default_annotations, | |
1335 TRAPS) { | |
1336 ClassFileStream* cfs = stream(); | |
1337 methodHandle nullHandle; | |
1338 ResourceMark rm(THREAD); | |
1339 // Parse fixed parts | |
1340 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
1341 | |
1342 int flags = cfs->get_u2_fast(); | |
1343 u2 name_index = cfs->get_u2_fast(); | |
1344 int cp_size = cp->length(); | |
1345 check_property( | |
1346 valid_cp_range(name_index, cp_size) && | |
1347 cp->tag_at(name_index).is_utf8(), | |
1348 "Illegal constant pool index %u for method name in class file %s", | |
1349 name_index, CHECK_(nullHandle)); | |
1350 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1351 verify_legal_method_name(name, CHECK_(nullHandle)); | |
1352 | |
1353 u2 signature_index = cfs->get_u2_fast(); | |
1354 guarantee_property( | |
1355 valid_cp_range(signature_index, cp_size) && | |
1356 cp->tag_at(signature_index).is_utf8(), | |
1357 "Illegal constant pool index %u for method signature in class file %s", | |
1358 signature_index, CHECK_(nullHandle)); | |
1359 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
1360 | |
1361 AccessFlags access_flags; | |
1362 if (name == vmSymbols::class_initializer_name()) { | |
1363 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
1364 flags = JVM_ACC_STATIC; | |
1365 } else { | |
1366 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
1367 } | |
1368 | |
1369 int args_size = -1; // only used when _need_verify is true | |
1370 if (_need_verify) { | |
1371 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
1372 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
1373 if (args_size > MAX_ARGS_SIZE) { | |
1374 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
1375 } | |
1376 } | |
1377 | |
1378 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
1379 | |
1380 // Default values for code and exceptions attribute elements | |
1381 u2 max_stack = 0; | |
1382 u2 max_locals = 0; | |
1383 u4 code_length = 0; | |
1384 u1* code_start = 0; | |
1385 u2 exception_table_length = 0; | |
1386 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
1387 u2 checked_exceptions_length = 0; | |
1388 u2* checked_exceptions_start = NULL; | |
1389 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
1390 int linenumber_table_length = 0; | |
1391 int total_lvt_length = 0; | |
1392 u2 lvt_cnt = 0; | |
1393 u2 lvtt_cnt = 0; | |
1394 bool lvt_allocated = false; | |
1395 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1396 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1397 u2* localvariable_table_length; | |
1398 u2** localvariable_table_start; | |
1399 u2* localvariable_type_table_length; | |
1400 u2** localvariable_type_table_start; | |
1401 bool parsed_code_attribute = false; | |
1402 bool parsed_checked_exceptions_attribute = false; | |
1403 bool parsed_stackmap_attribute = false; | |
1404 // stackmap attribute - JDK1.5 | |
1405 typeArrayHandle stackmap_data; | |
1406 u2 generic_signature_index = 0; | |
1407 u1* runtime_visible_annotations = NULL; | |
1408 int runtime_visible_annotations_length = 0; | |
1409 u1* runtime_invisible_annotations = NULL; | |
1410 int runtime_invisible_annotations_length = 0; | |
1411 u1* runtime_visible_parameter_annotations = NULL; | |
1412 int runtime_visible_parameter_annotations_length = 0; | |
1413 u1* runtime_invisible_parameter_annotations = NULL; | |
1414 int runtime_invisible_parameter_annotations_length = 0; | |
1415 u1* annotation_default = NULL; | |
1416 int annotation_default_length = 0; | |
1417 | |
1418 // Parse code and exceptions attribute | |
1419 u2 method_attributes_count = cfs->get_u2_fast(); | |
1420 while (method_attributes_count--) { | |
1421 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
1422 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
1423 u4 method_attribute_length = cfs->get_u4_fast(); | |
1424 check_property( | |
1425 valid_cp_range(method_attribute_name_index, cp_size) && | |
1426 cp->tag_at(method_attribute_name_index).is_utf8(), | |
1427 "Invalid method attribute name index %u in class file %s", | |
1428 method_attribute_name_index, CHECK_(nullHandle)); | |
1429 | |
1430 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
1431 if (method_attribute_name == vmSymbols::tag_code()) { | |
1432 // Parse Code attribute | |
1433 if (_need_verify) { | |
1434 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
1435 "Code attribute in native or abstract methods in class file %s", | |
1436 CHECK_(nullHandle)); | |
1437 } | |
1438 if (parsed_code_attribute) { | |
1439 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
1440 } | |
1441 parsed_code_attribute = true; | |
1442 | |
1443 // Stack size, locals size, and code size | |
1444 if (_major_version == 45 && _minor_version <= 2) { | |
1445 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
1446 max_stack = cfs->get_u1_fast(); | |
1447 max_locals = cfs->get_u1_fast(); | |
1448 code_length = cfs->get_u2_fast(); | |
1449 } else { | |
1450 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
1451 max_stack = cfs->get_u2_fast(); | |
1452 max_locals = cfs->get_u2_fast(); | |
1453 code_length = cfs->get_u4_fast(); | |
1454 } | |
1455 if (_need_verify) { | |
1456 guarantee_property(args_size <= max_locals, | |
1457 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
1458 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
1459 "Invalid method Code length %u in class file %s", | |
1460 code_length, CHECK_(nullHandle)); | |
1461 } | |
1462 // Code pointer | |
1463 code_start = cfs->get_u1_buffer(); | |
1464 assert(code_start != NULL, "null code start"); | |
1465 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
1466 cfs->skip_u1_fast(code_length); | |
1467 | |
1468 // Exception handler table | |
1469 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
1470 exception_table_length = cfs->get_u2_fast(); | |
1471 if (exception_table_length > 0) { | |
1472 exception_handlers = | |
1473 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
1474 } | |
1475 | |
1476 // Parse additional attributes in code attribute | |
1477 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
1478 u2 code_attributes_count = cfs->get_u2_fast(); | |
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1479 |
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1480 unsigned int calculated_attribute_length = 0; |
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1481 |
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1482 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1483 calculated_attribute_length = |
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1484 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1485 } else { |
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1486 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1487 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1488 } |
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1489 calculated_attribute_length += |
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1490 code_length + |
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1491 sizeof(exception_table_length) + |
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1492 sizeof(code_attributes_count) + |
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1493 exception_table_length * |
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1494 ( sizeof(u2) + // start_pc |
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1495 sizeof(u2) + // end_pc |
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1496 sizeof(u2) + // handler_pc |
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1497 sizeof(u2) ); // catch_type_index |
0 | 1498 |
1499 while (code_attributes_count--) { | |
1500 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
1501 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
1502 u4 code_attribute_length = cfs->get_u4_fast(); | |
1503 calculated_attribute_length += code_attribute_length + | |
1504 sizeof(code_attribute_name_index) + | |
1505 sizeof(code_attribute_length); | |
1506 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
1507 cp->tag_at(code_attribute_name_index).is_utf8(), | |
1508 "Invalid code attribute name index %u in class file %s", | |
1509 code_attribute_name_index, | |
1510 CHECK_(nullHandle)); | |
1511 if (LoadLineNumberTables && | |
1512 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
1513 // Parse and compress line number table | |
1514 parse_linenumber_table(code_attribute_length, code_length, | |
1515 &linenumber_table, CHECK_(nullHandle)); | |
1516 | |
1517 } else if (LoadLocalVariableTables && | |
1518 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
1519 // Parse local variable table | |
1520 if (!lvt_allocated) { | |
1521 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1522 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1523 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1524 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1525 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1526 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1527 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1528 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1529 lvt_allocated = true; | |
1530 } | |
1531 if (lvt_cnt == max_lvt_cnt) { | |
1532 max_lvt_cnt <<= 1; | |
1533 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
1534 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
1535 } | |
1536 localvariable_table_start[lvt_cnt] = | |
1537 parse_localvariable_table(code_length, | |
1538 max_locals, | |
1539 code_attribute_length, | |
1540 cp, | |
1541 &localvariable_table_length[lvt_cnt], | |
1542 false, // is not LVTT | |
1543 CHECK_(nullHandle)); | |
1544 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
1545 lvt_cnt++; | |
1546 } else if (LoadLocalVariableTypeTables && | |
1547 _major_version >= JAVA_1_5_VERSION && | |
1548 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
1549 if (!lvt_allocated) { | |
1550 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1551 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1552 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1553 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1554 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1555 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1556 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1557 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1558 lvt_allocated = true; | |
1559 } | |
1560 // Parse local variable type table | |
1561 if (lvtt_cnt == max_lvtt_cnt) { | |
1562 max_lvtt_cnt <<= 1; | |
1563 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
1564 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
1565 } | |
1566 localvariable_type_table_start[lvtt_cnt] = | |
1567 parse_localvariable_table(code_length, | |
1568 max_locals, | |
1569 code_attribute_length, | |
1570 cp, | |
1571 &localvariable_type_table_length[lvtt_cnt], | |
1572 true, // is LVTT | |
1573 CHECK_(nullHandle)); | |
1574 lvtt_cnt++; | |
1575 } else if (UseSplitVerifier && | |
1576 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
1577 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
1578 // Stack map is only needed by the new verifier in JDK1.5. | |
1579 if (parsed_stackmap_attribute) { | |
1580 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
1581 } | |
1582 typeArrayOop sm = | |
1583 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
1584 stackmap_data = typeArrayHandle(THREAD, sm); | |
1585 parsed_stackmap_attribute = true; | |
1586 } else { | |
1587 // Skip unknown attributes | |
1588 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
1589 } | |
1590 } | |
1591 // check method attribute length | |
1592 if (_need_verify) { | |
1593 guarantee_property(method_attribute_length == calculated_attribute_length, | |
1594 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
1595 } | |
1596 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
1597 // Parse Exceptions attribute | |
1598 if (parsed_checked_exceptions_attribute) { | |
1599 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
1600 } | |
1601 parsed_checked_exceptions_attribute = true; | |
1602 checked_exceptions_start = | |
1603 parse_checked_exceptions(&checked_exceptions_length, | |
1604 method_attribute_length, | |
1605 cp, CHECK_(nullHandle)); | |
1606 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
1607 if (method_attribute_length != 0) { | |
1608 classfile_parse_error( | |
1609 "Invalid Synthetic method attribute length %u in class file %s", | |
1610 method_attribute_length, CHECK_(nullHandle)); | |
1611 } | |
1612 // Should we check that there hasn't already been a synthetic attribute? | |
1613 access_flags.set_is_synthetic(); | |
1614 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
1615 if (method_attribute_length != 0) { | |
1616 classfile_parse_error( | |
1617 "Invalid Deprecated method attribute length %u in class file %s", | |
1618 method_attribute_length, CHECK_(nullHandle)); | |
1619 } | |
1620 } else if (_major_version >= JAVA_1_5_VERSION) { | |
1621 if (method_attribute_name == vmSymbols::tag_signature()) { | |
1622 if (method_attribute_length != 2) { | |
1623 classfile_parse_error( | |
1624 "Invalid Signature attribute length %u in class file %s", | |
1625 method_attribute_length, CHECK_(nullHandle)); | |
1626 } | |
1627 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
1628 generic_signature_index = cfs->get_u2_fast(); | |
1629 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
1630 runtime_visible_annotations_length = method_attribute_length; | |
1631 runtime_visible_annotations = cfs->get_u1_buffer(); | |
1632 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
1633 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
1634 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
1635 runtime_invisible_annotations_length = method_attribute_length; | |
1636 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
1637 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
1638 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
1639 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
1640 runtime_visible_parameter_annotations_length = method_attribute_length; | |
1641 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
1642 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
1643 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
1644 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
1645 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
1646 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
1647 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
1648 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
1649 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
1650 annotation_default_length = method_attribute_length; | |
1651 annotation_default = cfs->get_u1_buffer(); | |
1652 assert(annotation_default != NULL, "null annotation default"); | |
1653 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
1654 } else { | |
1655 // Skip unknown attributes | |
1656 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1657 } | |
1658 } else { | |
1659 // Skip unknown attributes | |
1660 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1661 } | |
1662 } | |
1663 | |
1664 if (linenumber_table != NULL) { | |
1665 linenumber_table->write_terminator(); | |
1666 linenumber_table_length = linenumber_table->position(); | |
1667 } | |
1668 | |
1669 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
1670 if (_need_verify) { | |
1671 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
1672 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
1673 } | |
1674 | |
1675 // All sizing information for a methodOop is finally available, now create it | |
1676 methodOop m_oop = oopFactory::new_method( | |
1677 code_length, access_flags, linenumber_table_length, | |
1678 total_lvt_length, checked_exceptions_length, CHECK_(nullHandle)); | |
1679 methodHandle m (THREAD, m_oop); | |
1680 | |
1681 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
1682 | |
1683 // Fill in information from fixed part (access_flags already set) | |
1684 m->set_constants(cp()); | |
1685 m->set_name_index(name_index); | |
1686 m->set_signature_index(signature_index); | |
1687 m->set_generic_signature_index(generic_signature_index); | |
1688 #ifdef CC_INTERP | |
1689 // hmm is there a gc issue here?? | |
1690 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
1691 m->set_result_index(rtf.type()); | |
1692 #endif | |
1693 | |
1694 if (args_size >= 0) { | |
1695 m->set_size_of_parameters(args_size); | |
1696 } else { | |
1697 m->compute_size_of_parameters(THREAD); | |
1698 } | |
1699 #ifdef ASSERT | |
1700 if (args_size >= 0) { | |
1701 m->compute_size_of_parameters(THREAD); | |
1702 assert(args_size == m->size_of_parameters(), ""); | |
1703 } | |
1704 #endif | |
1705 | |
1706 // Fill in code attribute information | |
1707 m->set_max_stack(max_stack); | |
1708 m->set_max_locals(max_locals); | |
1709 m->constMethod()->set_stackmap_data(stackmap_data()); | |
1710 | |
1711 /** | |
1712 * The exception_table field is the flag used to indicate | |
1713 * that the methodOop and it's associated constMethodOop are partially | |
1714 * initialized and thus are exempt from pre/post GC verification. Once | |
1715 * the field is set, the oops are considered fully initialized so make | |
1716 * sure that the oops can pass verification when this field is set. | |
1717 */ | |
1718 m->set_exception_table(exception_handlers()); | |
1719 | |
1720 // Copy byte codes | |
1721 if (code_length > 0) { | |
1722 memcpy(m->code_base(), code_start, code_length); | |
1723 } | |
1724 | |
1725 // Copy line number table | |
1726 if (linenumber_table != NULL) { | |
1727 memcpy(m->compressed_linenumber_table(), | |
1728 linenumber_table->buffer(), linenumber_table_length); | |
1729 } | |
1730 | |
1731 // Copy checked exceptions | |
1732 if (checked_exceptions_length > 0) { | |
1733 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1734 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
1735 } | |
1736 | |
1737 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
1738 * | |
1739 * Rules for LVT's and LVTT's are: | |
1740 * - There can be any number of LVT's and LVTT's. | |
1741 * - If there are n LVT's, it is the same as if there was just | |
1742 * one LVT containing all the entries from the n LVT's. | |
1743 * - There may be no more than one LVT entry per local variable. | |
1744 * Two LVT entries are 'equal' if these fields are the same: | |
1745 * start_pc, length, name, slot | |
1746 * - There may be no more than one LVTT entry per each LVT entry. | |
1747 * Each LVTT entry has to match some LVT entry. | |
1748 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
1749 */ | |
1750 if (total_lvt_length > 0) { | |
1751 int tbl_no, idx; | |
1752 | |
1753 promoted_flags->set_has_localvariable_table(); | |
1754 | |
1755 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
1756 initialize_hashtable(lvt_Hash); | |
1757 | |
1758 // To fill LocalVariableTable in | |
1759 Classfile_LVT_Element* cf_lvt; | |
1760 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
1761 | |
1762 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
1763 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
1764 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
1765 copy_lvt_element(&cf_lvt[idx], lvt); | |
1766 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
1767 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
1768 && _need_verify | |
1769 && _major_version >= JAVA_1_5_VERSION ) { | |
1770 clear_hashtable(lvt_Hash); | |
1771 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
1772 "entry for '%s' in class file %s", | |
1773 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
1774 CHECK_(nullHandle)); | |
1775 } | |
1776 } | |
1777 } | |
1778 | |
1779 // To merge LocalVariableTable and LocalVariableTypeTable | |
1780 Classfile_LVT_Element* cf_lvtt; | |
1781 LocalVariableTableElement lvtt_elem; | |
1782 | |
1783 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
1784 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
1785 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
1786 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
1787 int index = hash(&lvtt_elem); | |
1788 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
1789 if (entry == NULL) { | |
1790 if (_need_verify) { | |
1791 clear_hashtable(lvt_Hash); | |
1792 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
1793 "does not match any LVT entry", | |
1794 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1795 CHECK_(nullHandle)); | |
1796 } | |
1797 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
1798 clear_hashtable(lvt_Hash); | |
1799 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
1800 "entry for '%s' in class file %s", | |
1801 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1802 CHECK_(nullHandle)); | |
1803 } else { | |
1804 // to add generic signatures into LocalVariableTable | |
1805 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
1806 } | |
1807 } | |
1808 } | |
1809 clear_hashtable(lvt_Hash); | |
1810 } | |
1811 | |
1812 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
1813 runtime_visible_annotations_length, | |
1814 runtime_invisible_annotations, | |
1815 runtime_invisible_annotations_length, | |
1816 CHECK_(nullHandle)); | |
1817 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
1818 runtime_visible_parameter_annotations_length, | |
1819 runtime_invisible_parameter_annotations, | |
1820 runtime_invisible_parameter_annotations_length, | |
1821 CHECK_(nullHandle)); | |
1822 *method_default_annotations = assemble_annotations(annotation_default, | |
1823 annotation_default_length, | |
1824 NULL, | |
1825 0, | |
1826 CHECK_(nullHandle)); | |
1827 | |
1828 if (name() == vmSymbols::finalize_method_name() && | |
1829 signature() == vmSymbols::void_method_signature()) { | |
1830 if (m->is_empty_method()) { | |
1831 _has_empty_finalizer = true; | |
1832 } else { | |
1833 _has_finalizer = true; | |
1834 } | |
1835 } | |
1836 if (name() == vmSymbols::object_initializer_name() && | |
1837 signature() == vmSymbols::void_method_signature() && | |
1838 m->is_vanilla_constructor()) { | |
1839 _has_vanilla_constructor = true; | |
1840 } | |
1841 | |
1842 return m; | |
1843 } | |
1844 | |
1845 | |
1846 // The promoted_flags parameter is used to pass relevant access_flags | |
1847 // from the methods back up to the containing klass. These flag values | |
1848 // are added to klass's access_flags. | |
1849 | |
1850 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
1851 AccessFlags* promoted_flags, | |
1852 bool* has_final_method, | |
1853 objArrayOop* methods_annotations_oop, | |
1854 objArrayOop* methods_parameter_annotations_oop, | |
1855 objArrayOop* methods_default_annotations_oop, | |
1856 TRAPS) { | |
1857 ClassFileStream* cfs = stream(); | |
1858 objArrayHandle nullHandle; | |
1859 typeArrayHandle method_annotations; | |
1860 typeArrayHandle method_parameter_annotations; | |
1861 typeArrayHandle method_default_annotations; | |
1862 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
1863 u2 length = cfs->get_u2_fast(); | |
1864 if (length == 0) { | |
1865 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
1866 } else { | |
1867 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1868 objArrayHandle methods(THREAD, m); | |
1869 HandleMark hm(THREAD); | |
1870 objArrayHandle methods_annotations; | |
1871 objArrayHandle methods_parameter_annotations; | |
1872 objArrayHandle methods_default_annotations; | |
1873 for (int index = 0; index < length; index++) { | |
1874 methodHandle method = parse_method(cp, is_interface, | |
1875 promoted_flags, | |
1876 &method_annotations, | |
1877 &method_parameter_annotations, | |
1878 &method_default_annotations, | |
1879 CHECK_(nullHandle)); | |
1880 if (method->is_final()) { | |
1881 *has_final_method = true; | |
1882 } | |
1883 methods->obj_at_put(index, method()); | |
1884 if (method_annotations.not_null()) { | |
1885 if (methods_annotations.is_null()) { | |
1886 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1887 methods_annotations = objArrayHandle(THREAD, md); | |
1888 } | |
1889 methods_annotations->obj_at_put(index, method_annotations()); | |
1890 } | |
1891 if (method_parameter_annotations.not_null()) { | |
1892 if (methods_parameter_annotations.is_null()) { | |
1893 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1894 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
1895 } | |
1896 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
1897 } | |
1898 if (method_default_annotations.not_null()) { | |
1899 if (methods_default_annotations.is_null()) { | |
1900 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
1901 methods_default_annotations = objArrayHandle(THREAD, md); | |
1902 } | |
1903 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
1904 } | |
1905 } | |
1906 if (_need_verify && length > 1) { | |
1907 // Check duplicated methods | |
1908 ResourceMark rm(THREAD); | |
1909 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1910 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
1911 initialize_hashtable(names_and_sigs); | |
1912 bool dup = false; | |
1913 { | |
1914 debug_only(No_Safepoint_Verifier nsv;) | |
1915 for (int i = 0; i < length; i++) { | |
1916 methodOop m = (methodOop)methods->obj_at(i); | |
1917 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
1918 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
1919 dup = true; | |
1920 break; | |
1921 } | |
1922 } | |
1923 } | |
1924 if (dup) { | |
1925 classfile_parse_error("Duplicate method name&signature in class file %s", | |
1926 CHECK_(nullHandle)); | |
1927 } | |
1928 } | |
1929 | |
1930 *methods_annotations_oop = methods_annotations(); | |
1931 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
1932 *methods_default_annotations_oop = methods_default_annotations(); | |
1933 | |
1934 return methods; | |
1935 } | |
1936 } | |
1937 | |
1938 | |
1939 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
1940 objArrayHandle methods_annotations, | |
1941 objArrayHandle methods_parameter_annotations, | |
1942 objArrayHandle methods_default_annotations, | |
1943 TRAPS) { | |
1944 typeArrayHandle nullHandle; | |
1945 int length = methods()->length(); | |
1946 // If JVMTI original method ordering is enabled we have to | |
1947 // remember the original class file ordering. | |
1948 // We temporarily use the vtable_index field in the methodOop to store the | |
1949 // class file index, so we can read in after calling qsort. | |
1950 if (JvmtiExport::can_maintain_original_method_order()) { | |
1951 for (int index = 0; index < length; index++) { | |
1952 methodOop m = methodOop(methods->obj_at(index)); | |
1953 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
1954 m->set_vtable_index(index); | |
1955 } | |
1956 } | |
1957 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
1958 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
1959 methodOopDesc::sort_methods(methods(), | |
1960 methods_annotations(), | |
1961 methods_parameter_annotations(), | |
1962 methods_default_annotations()); | |
1963 | |
1964 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
1965 if (JvmtiExport::can_maintain_original_method_order()) { | |
1966 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
1967 typeArrayHandle method_ordering(THREAD, new_ordering); | |
1968 for (int index = 0; index < length; index++) { | |
1969 methodOop m = methodOop(methods->obj_at(index)); | |
1970 int old_index = m->vtable_index(); | |
1971 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
1972 method_ordering->int_at_put(index, old_index); | |
1973 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
1974 } | |
1975 return method_ordering; | |
1976 } else { | |
1977 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
1978 } | |
1979 } | |
1980 | |
1981 | |
1982 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
1983 ClassFileStream* cfs = stream(); | |
1984 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
1985 u2 sourcefile_index = cfs->get_u2_fast(); | |
1986 check_property( | |
1987 valid_cp_range(sourcefile_index, cp->length()) && | |
1988 cp->tag_at(sourcefile_index).is_utf8(), | |
1989 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
1990 sourcefile_index, CHECK); | |
1991 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
1992 } | |
1993 | |
1994 | |
1995 | |
1996 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
1997 instanceKlassHandle k, | |
1998 int length, TRAPS) { | |
1999 ClassFileStream* cfs = stream(); | |
2000 u1* sde_buffer = cfs->get_u1_buffer(); | |
2001 assert(sde_buffer != NULL, "null sde buffer"); | |
2002 | |
2003 // Don't bother storing it if there is no way to retrieve it | |
2004 if (JvmtiExport::can_get_source_debug_extension()) { | |
2005 // Optimistically assume that only 1 byte UTF format is used | |
2006 // (common case) | |
2007 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
2008 length, CHECK); | |
2009 k->set_source_debug_extension(sde_symbol); | |
2010 } | |
2011 // Got utf8 string, set stream position forward | |
2012 cfs->skip_u1(length, CHECK); | |
2013 } | |
2014 | |
2015 | |
2016 // Inner classes can be static, private or protected (classic VM does this) | |
2017 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
2018 | |
2019 // Return number of classes in the inner classes attribute table | |
2020 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2021 ClassFileStream* cfs = stream(); | |
2022 cfs->guarantee_more(2, CHECK_0); // length | |
2023 u2 length = cfs->get_u2_fast(); | |
2024 | |
2025 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
2026 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
2027 typeArrayHandle inner_classes(THREAD, ic); | |
2028 int index = 0; | |
2029 int cp_size = cp->length(); | |
2030 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
2031 for (int n = 0; n < length; n++) { | |
2032 // Inner class index | |
2033 u2 inner_class_info_index = cfs->get_u2_fast(); | |
2034 check_property( | |
2035 inner_class_info_index == 0 || | |
2036 (valid_cp_range(inner_class_info_index, cp_size) && | |
431
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diff
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|
2037 is_klass_reference(cp, inner_class_info_index)), |
0 | 2038 "inner_class_info_index %u has bad constant type in class file %s", |
2039 inner_class_info_index, CHECK_0); | |
2040 // Outer class index | |
2041 u2 outer_class_info_index = cfs->get_u2_fast(); | |
2042 check_property( | |
2043 outer_class_info_index == 0 || | |
2044 (valid_cp_range(outer_class_info_index, cp_size) && | |
431
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parents:
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diff
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|
2045 is_klass_reference(cp, outer_class_info_index)), |
0 | 2046 "outer_class_info_index %u has bad constant type in class file %s", |
2047 outer_class_info_index, CHECK_0); | |
2048 // Inner class name | |
2049 u2 inner_name_index = cfs->get_u2_fast(); | |
2050 check_property( | |
2051 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
2052 cp->tag_at(inner_name_index).is_utf8()), | |
2053 "inner_name_index %u has bad constant type in class file %s", | |
2054 inner_name_index, CHECK_0); | |
2055 if (_need_verify) { | |
2056 guarantee_property(inner_class_info_index != outer_class_info_index, | |
2057 "Class is both outer and inner class in class file %s", CHECK_0); | |
2058 } | |
2059 // Access flags | |
2060 AccessFlags inner_access_flags; | |
2061 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
2062 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2063 // Set abstract bit for old class files for backward compatibility | |
2064 flags |= JVM_ACC_ABSTRACT; | |
2065 } | |
2066 verify_legal_class_modifiers(flags, CHECK_0); | |
2067 inner_access_flags.set_flags(flags); | |
2068 | |
2069 inner_classes->short_at_put(index++, inner_class_info_index); | |
2070 inner_classes->short_at_put(index++, outer_class_info_index); | |
2071 inner_classes->short_at_put(index++, inner_name_index); | |
2072 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
2073 } | |
2074 | |
2075 // 4347400: make sure there's no duplicate entry in the classes array | |
2076 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2077 for(int i = 0; i < inner_classes->length(); i += 4) { | |
2078 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
2079 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
2080 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
2081 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
2082 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
2083 "Duplicate entry in InnerClasses in class file %s", | |
2084 CHECK_0); | |
2085 } | |
2086 } | |
2087 } | |
2088 | |
2089 // Update instanceKlass with inner class info. | |
2090 k->set_inner_classes(inner_classes()); | |
2091 return length; | |
2092 } | |
2093 | |
2094 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2095 k->set_is_synthetic(); | |
2096 } | |
2097 | |
2098 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2099 ClassFileStream* cfs = stream(); | |
2100 u2 signature_index = cfs->get_u2(CHECK); | |
2101 check_property( | |
2102 valid_cp_range(signature_index, cp->length()) && | |
2103 cp->tag_at(signature_index).is_utf8(), | |
2104 "Invalid constant pool index %u in Signature attribute in class file %s", | |
2105 signature_index, CHECK); | |
2106 k->set_generic_signature(cp->symbol_at(signature_index)); | |
2107 } | |
2108 | |
2109 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2110 ClassFileStream* cfs = stream(); | |
2111 // Set inner classes attribute to default sentinel | |
2112 k->set_inner_classes(Universe::the_empty_short_array()); | |
2113 cfs->guarantee_more(2, CHECK); // attributes_count | |
2114 u2 attributes_count = cfs->get_u2_fast(); | |
2115 bool parsed_sourcefile_attribute = false; | |
2116 bool parsed_innerclasses_attribute = false; | |
2117 bool parsed_enclosingmethod_attribute = false; | |
2118 u1* runtime_visible_annotations = NULL; | |
2119 int runtime_visible_annotations_length = 0; | |
2120 u1* runtime_invisible_annotations = NULL; | |
2121 int runtime_invisible_annotations_length = 0; | |
2122 // Iterate over attributes | |
2123 while (attributes_count--) { | |
2124 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
2125 u2 attribute_name_index = cfs->get_u2_fast(); | |
2126 u4 attribute_length = cfs->get_u4_fast(); | |
2127 check_property( | |
2128 valid_cp_range(attribute_name_index, cp->length()) && | |
2129 cp->tag_at(attribute_name_index).is_utf8(), | |
2130 "Attribute name has bad constant pool index %u in class file %s", | |
2131 attribute_name_index, CHECK); | |
2132 symbolOop tag = cp->symbol_at(attribute_name_index); | |
2133 if (tag == vmSymbols::tag_source_file()) { | |
2134 // Check for SourceFile tag | |
2135 if (_need_verify) { | |
2136 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
2137 } | |
2138 if (parsed_sourcefile_attribute) { | |
2139 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
2140 } else { | |
2141 parsed_sourcefile_attribute = true; | |
2142 } | |
2143 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
2144 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
2145 // Check for SourceDebugExtension tag | |
2146 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
2147 } else if (tag == vmSymbols::tag_inner_classes()) { | |
2148 // Check for InnerClasses tag | |
2149 if (parsed_innerclasses_attribute) { | |
2150 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
2151 } else { | |
2152 parsed_innerclasses_attribute = true; | |
2153 } | |
2154 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
2155 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2156 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
2157 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
2158 } | |
2159 } else if (tag == vmSymbols::tag_synthetic()) { | |
2160 // Check for Synthetic tag | |
2161 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
2162 if (attribute_length != 0) { | |
2163 classfile_parse_error( | |
2164 "Invalid Synthetic classfile attribute length %u in class file %s", | |
2165 attribute_length, CHECK); | |
2166 } | |
2167 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
2168 } else if (tag == vmSymbols::tag_deprecated()) { | |
2169 // Check for Deprecatd tag - 4276120 | |
2170 if (attribute_length != 0) { | |
2171 classfile_parse_error( | |
2172 "Invalid Deprecated classfile attribute length %u in class file %s", | |
2173 attribute_length, CHECK); | |
2174 } | |
2175 } else if (_major_version >= JAVA_1_5_VERSION) { | |
2176 if (tag == vmSymbols::tag_signature()) { | |
2177 if (attribute_length != 2) { | |
2178 classfile_parse_error( | |
2179 "Wrong Signature attribute length %u in class file %s", | |
2180 attribute_length, CHECK); | |
2181 } | |
2182 parse_classfile_signature_attribute(cp, k, CHECK); | |
2183 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
2184 runtime_visible_annotations_length = attribute_length; | |
2185 runtime_visible_annotations = cfs->get_u1_buffer(); | |
2186 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
2187 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
2188 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
2189 runtime_invisible_annotations_length = attribute_length; | |
2190 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
2191 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
2192 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
2193 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
2194 if (parsed_enclosingmethod_attribute) { | |
2195 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
2196 } else { | |
2197 parsed_enclosingmethod_attribute = true; | |
2198 } | |
2199 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
2200 u2 class_index = cfs->get_u2_fast(); | |
2201 u2 method_index = cfs->get_u2_fast(); | |
2202 if (class_index == 0) { | |
2203 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
2204 } | |
2205 // Validate the constant pool indices and types | |
2206 if (!cp->is_within_bounds(class_index) || | |
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2207 !is_klass_reference(cp, class_index)) { |
0 | 2208 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
2209 } | |
2210 if (method_index != 0 && | |
2211 (!cp->is_within_bounds(method_index) || | |
2212 !cp->tag_at(method_index).is_name_and_type())) { | |
2213 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
2214 } | |
2215 k->set_enclosing_method_indices(class_index, method_index); | |
2216 } else { | |
2217 // Unknown attribute | |
2218 cfs->skip_u1(attribute_length, CHECK); | |
2219 } | |
2220 } else { | |
2221 // Unknown attribute | |
2222 cfs->skip_u1(attribute_length, CHECK); | |
2223 } | |
2224 } | |
2225 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
2226 runtime_visible_annotations_length, | |
2227 runtime_invisible_annotations, | |
2228 runtime_invisible_annotations_length, | |
2229 CHECK); | |
2230 k->set_class_annotations(annotations()); | |
2231 } | |
2232 | |
2233 | |
2234 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
2235 int runtime_visible_annotations_length, | |
2236 u1* runtime_invisible_annotations, | |
2237 int runtime_invisible_annotations_length, TRAPS) { | |
2238 typeArrayHandle annotations; | |
2239 if (runtime_visible_annotations != NULL || | |
2240 runtime_invisible_annotations != NULL) { | |
2241 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
2242 runtime_invisible_annotations_length, CHECK_(annotations)); | |
2243 annotations = typeArrayHandle(THREAD, anno); | |
2244 if (runtime_visible_annotations != NULL) { | |
2245 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
2246 } | |
2247 if (runtime_invisible_annotations != NULL) { | |
2248 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
2249 } | |
2250 } | |
2251 return annotations; | |
2252 } | |
2253 | |
2254 | |
2255 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
2256 KlassHandle h_k (THREAD, fd->field_holder()); | |
2257 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
2258 if (fd->has_initial_value()) { | |
2259 BasicType t = fd->field_type(); | |
2260 switch (t) { | |
2261 case T_BYTE: | |
2262 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
2263 break; | |
2264 case T_BOOLEAN: | |
2265 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
2266 break; | |
2267 case T_CHAR: | |
2268 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
2269 break; | |
2270 case T_SHORT: | |
2271 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
2272 break; | |
2273 case T_INT: | |
2274 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
2275 break; | |
2276 case T_FLOAT: | |
2277 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
2278 break; | |
2279 case T_DOUBLE: | |
2280 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
2281 break; | |
2282 case T_LONG: | |
2283 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
2284 break; | |
2285 case T_OBJECT: | |
2286 { | |
2287 #ifdef ASSERT | |
2288 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
2289 assert(fd->signature() == sym, "just checking"); | |
2290 #endif | |
2291 oop string = fd->string_initial_value(CHECK); | |
2292 h_k()->obj_field_put(fd->offset(), string); | |
2293 } | |
2294 break; | |
2295 default: | |
2296 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
2297 "Illegal ConstantValue attribute in class file"); | |
2298 } | |
2299 } | |
2300 } | |
2301 | |
2302 | |
2303 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
2304 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
2305 // This code is for compatibility with earlier jdk's that do not | |
2306 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
2307 // the check for the "discovered" field should issue a warning if | |
2308 // the field is not found. For 1.6 this code should be issue a | |
2309 // fatal error if the "discovered" field is not found. | |
2310 // | |
2311 // Increment fac.nonstatic_oop_count so that the start of the | |
2312 // next type of non-static oops leaves room for the fake oop. | |
2313 // Do not increment next_nonstatic_oop_offset so that the | |
2314 // fake oop is place after the java.lang.ref.Reference oop | |
2315 // fields. | |
2316 // | |
2317 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2318 // field. If it is not present, artifically create a field for it. | |
2319 // This allows this VM to run on early JDK where the field is not | |
2320 // present. | |
2321 | |
2322 // | |
2323 // Increment fac.nonstatic_oop_count so that the start of the | |
2324 // next type of non-static oops leaves room for the fake oop. | |
2325 // Do not increment next_nonstatic_oop_offset so that the | |
2326 // fake oop is place after the java.lang.ref.Reference oop | |
2327 // fields. | |
2328 // | |
2329 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2330 // field. If it is not present, artifically create a field for it. | |
2331 // This allows this VM to run on early JDK where the field is not | |
2332 // present. | |
2333 int reference_sig_index = 0; | |
2334 int reference_name_index = 0; | |
2335 int reference_index = 0; | |
2336 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
2337 const int n = (*fields_ptr)()->length(); | |
2338 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
2339 int name_index = | |
2340 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
2341 int sig_index = | |
2342 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
2343 symbolOop f_name = cp->symbol_at(name_index); | |
2344 symbolOop f_sig = cp->symbol_at(sig_index); | |
2345 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
2346 // Save the index for reference signature for later use. | |
2347 // The fake discovered field does not entries in the | |
2348 // constant pool so the index for its signature cannot | |
2349 // be extracted from the constant pool. It will need | |
2350 // later, however. It's signature is vmSymbols::reference_signature() | |
2351 // so same an index for that signature. | |
2352 reference_sig_index = sig_index; | |
2353 reference_name_index = name_index; | |
2354 reference_index = i; | |
2355 } | |
2356 if (f_name == vmSymbols::reference_discovered_name() && | |
2357 f_sig == vmSymbols::reference_signature()) { | |
2358 // The values below are fake but will force extra | |
2359 // non-static oop fields and a corresponding non-static | |
2360 // oop map block to be allocated. | |
2361 extra = 0; | |
2362 break; | |
2363 } | |
2364 } | |
2365 if (extra != 0) { | |
2366 fac_ptr->nonstatic_oop_count += extra; | |
2367 // Add the additional entry to "fields" so that the klass | |
2368 // contains the "discoverd" field and the field will be initialized | |
2369 // in instances of the object. | |
2370 int fields_with_fix_length = (*fields_ptr)()->length() + | |
2371 instanceKlass::next_offset; | |
2372 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
2373 fields_with_fix_length, CHECK); | |
2374 typeArrayHandle fields_with_fix(THREAD, ff); | |
2375 | |
2376 // Take everything from the original but the length. | |
2377 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
2378 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
2379 } | |
2380 | |
2381 // Add the fake field at the end. | |
2382 int i = (*fields_ptr)->length(); | |
2383 // There is no name index for the fake "discovered" field nor | |
2384 // signature but a signature is needed so that the field will | |
2385 // be properly initialized. Use one found for | |
2386 // one of the other reference fields. Be sure the index for the | |
2387 // name is 0. In fieldDescriptor::initialize() the index of the | |
2388 // name is checked. That check is by passed for the last nonstatic | |
2389 // oop field in a java.lang.ref.Reference which is assumed to be | |
2390 // this artificial "discovered" field. An assertion checks that | |
2391 // the name index is 0. | |
2392 assert(reference_index != 0, "Missing signature for reference"); | |
2393 | |
2394 int j; | |
2395 for (j = 0; j < instanceKlass::next_offset; j++) { | |
2396 fields_with_fix->ushort_at_put(i + j, | |
2397 (*fields_ptr)->ushort_at(reference_index +j)); | |
2398 } | |
2399 // Clear the public access flag and set the private access flag. | |
2400 short flags; | |
2401 flags = | |
2402 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
2403 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
2404 flags = flags & (~JVM_ACC_PUBLIC); | |
2405 flags = flags | JVM_ACC_PRIVATE; | |
2406 AccessFlags access_flags; | |
2407 access_flags.set_flags(flags); | |
2408 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
2409 assert(access_flags.is_private(), "Failed to set private flag"); | |
2410 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
2411 flags); | |
2412 | |
2413 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
2414 == reference_name_index, "The fake reference name is incorrect"); | |
2415 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
2416 == reference_sig_index, "The fake reference signature is incorrect"); | |
2417 // The type of the field is stored in the low_offset entry during | |
2418 // parsing. | |
2419 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
2420 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
2421 | |
2422 // "fields" is allocated in the permanent generation. Disgard | |
2423 // it and let it be collected. | |
2424 (*fields_ptr) = fields_with_fix; | |
2425 } | |
2426 return; | |
2427 } | |
2428 | |
2429 | |
2430 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
2431 FieldAllocationCount *fac_ptr, TRAPS) { | |
2432 // Add fake fields for java.lang.Class instances | |
2433 // | |
2434 // This is not particularly nice. We should consider adding a | |
2435 // private transient object field at the Java level to | |
2436 // java.lang.Class. Alternatively we could add a subclass of | |
2437 // instanceKlass which provides an accessor and size computer for | |
2438 // this field, but that appears to be more code than this hack. | |
2439 // | |
2440 // NOTE that we wedge these in at the beginning rather than the | |
2441 // end of the object because the Class layout changed between JDK | |
2442 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
2443 // nonstatic oop fields were added at the Java level. The offsets | |
2444 // of these fake fields can't change between these two JDK | |
2445 // versions because when the offsets are computed at bootstrap | |
2446 // time we don't know yet which version of the JDK we're running in. | |
2447 | |
2448 // The values below are fake but will force two non-static oop fields and | |
2449 // a corresponding non-static oop map block to be allocated. | |
2450 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
2451 fac_ptr->nonstatic_oop_count += extra; | |
2452 } | |
2453 | |
2454 | |
2455 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
2456 // Cause the extra fake fields in java.lang.Class to show up before | |
2457 // the Java fields for layout compatibility between 1.3 and 1.4 | |
2458 // Incrementing next_nonstatic_oop_offset here advances the | |
2459 // location where the real java fields are placed. | |
2460 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
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2461 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
0 | 2462 } |
2463 | |
2464 | |
2465 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, | |
2466 Handle class_loader, | |
2467 Handle protection_domain, | |
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2468 GrowableArray<Handle>* cp_patches, |
0 | 2469 symbolHandle& parsed_name, |
2470 TRAPS) { | |
2471 // So that JVMTI can cache class file in the state before retransformable agents | |
2472 // have modified it | |
2473 unsigned char *cached_class_file_bytes = NULL; | |
2474 jint cached_class_file_length; | |
2475 | |
2476 ClassFileStream* cfs = stream(); | |
2477 // Timing | |
2478 PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time()); | |
2479 | |
2480 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
2481 | |
2482 if (JvmtiExport::should_post_class_file_load_hook()) { | |
2483 unsigned char* ptr = cfs->buffer(); | |
2484 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
2485 | |
2486 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
2487 &ptr, &end_ptr, | |
2488 &cached_class_file_bytes, | |
2489 &cached_class_file_length); | |
2490 | |
2491 if (ptr != cfs->buffer()) { | |
2492 // JVMTI agent has modified class file data. | |
2493 // Set new class file stream using JVMTI agent modified | |
2494 // class file data. | |
2495 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
2496 set_stream(cfs); | |
2497 } | |
2498 } | |
2499 | |
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2500 _cp_patches = cp_patches; |
0 | 2501 |
2502 instanceKlassHandle nullHandle; | |
2503 | |
2504 // Figure out whether we can skip format checking (matching classic VM behavior) | |
2505 _need_verify = Verifier::should_verify_for(class_loader()); | |
2506 | |
2507 // Set the verify flag in stream | |
2508 cfs->set_verify(_need_verify); | |
2509 | |
2510 // Save the class file name for easier error message printing. | |
2511 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
2512 | |
2513 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
2514 // Magic value | |
2515 u4 magic = cfs->get_u4_fast(); | |
2516 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
2517 "Incompatible magic value %u in class file %s", | |
2518 magic, CHECK_(nullHandle)); | |
2519 | |
2520 // Version numbers | |
2521 u2 minor_version = cfs->get_u2_fast(); | |
2522 u2 major_version = cfs->get_u2_fast(); | |
2523 | |
2524 // Check version numbers - we check this even with verifier off | |
2525 if (!is_supported_version(major_version, minor_version)) { | |
2526 if (name.is_null()) { | |
2527 Exceptions::fthrow( | |
2528 THREAD_AND_LOCATION, | |
2529 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2530 "Unsupported major.minor version %u.%u", | |
2531 major_version, | |
2532 minor_version); | |
2533 } else { | |
2534 ResourceMark rm(THREAD); | |
2535 Exceptions::fthrow( | |
2536 THREAD_AND_LOCATION, | |
2537 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2538 "%s : Unsupported major.minor version %u.%u", | |
2539 name->as_C_string(), | |
2540 major_version, | |
2541 minor_version); | |
2542 } | |
2543 return nullHandle; | |
2544 } | |
2545 | |
2546 _major_version = major_version; | |
2547 _minor_version = minor_version; | |
2548 | |
2549 | |
2550 // Check if verification needs to be relaxed for this class file | |
2551 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
2552 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
2553 | |
2554 // Constant pool | |
2555 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
2556 int cp_size = cp->length(); | |
2557 | |
2558 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
2559 | |
2560 // Access flags | |
2561 AccessFlags access_flags; | |
2562 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
2563 | |
2564 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2565 // Set abstract bit for old class files for backward compatibility | |
2566 flags |= JVM_ACC_ABSTRACT; | |
2567 } | |
2568 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
2569 access_flags.set_flags(flags); | |
2570 | |
2571 // This class and superclass | |
2572 instanceKlassHandle super_klass; | |
2573 u2 this_class_index = cfs->get_u2_fast(); | |
2574 check_property( | |
2575 valid_cp_range(this_class_index, cp_size) && | |
2576 cp->tag_at(this_class_index).is_unresolved_klass(), | |
2577 "Invalid this class index %u in constant pool in class file %s", | |
2578 this_class_index, CHECK_(nullHandle)); | |
2579 | |
2580 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
2581 assert(class_name.not_null(), "class_name can't be null"); | |
2582 | |
2583 // It's important to set parsed_name *before* resolving the super class. | |
2584 // (it's used for cleanup by the caller if parsing fails) | |
2585 parsed_name = class_name; | |
2586 | |
2587 // Update _class_name which could be null previously to be class_name | |
2588 _class_name = class_name; | |
2589 | |
2590 // Don't need to check whether this class name is legal or not. | |
2591 // It has been checked when constant pool is parsed. | |
2592 // However, make sure it is not an array type. | |
2593 if (_need_verify) { | |
2594 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
2595 "Bad class name in class file %s", | |
2596 CHECK_(nullHandle)); | |
2597 } | |
2598 | |
2599 klassOop preserve_this_klass; // for storing result across HandleMark | |
2600 | |
2601 // release all handles when parsing is done | |
2602 { HandleMark hm(THREAD); | |
2603 | |
2604 // Checks if name in class file matches requested name | |
2605 if (name.not_null() && class_name() != name()) { | |
2606 ResourceMark rm(THREAD); | |
2607 Exceptions::fthrow( | |
2608 THREAD_AND_LOCATION, | |
2609 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
2610 "%s (wrong name: %s)", | |
2611 name->as_C_string(), | |
2612 class_name->as_C_string() | |
2613 ); | |
2614 return nullHandle; | |
2615 } | |
2616 | |
2617 if (TraceClassLoadingPreorder) { | |
2618 tty->print("[Loading %s", name()->as_klass_external_name()); | |
2619 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
2620 tty->print_cr("]"); | |
2621 } | |
2622 | |
2623 u2 super_class_index = cfs->get_u2_fast(); | |
2624 if (super_class_index == 0) { | |
2625 check_property(class_name() == vmSymbols::java_lang_Object(), | |
2626 "Invalid superclass index %u in class file %s", | |
2627 super_class_index, | |
2628 CHECK_(nullHandle)); | |
2629 } else { | |
2630 check_property(valid_cp_range(super_class_index, cp_size) && | |
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2631 is_klass_reference(cp, super_class_index), |
0 | 2632 "Invalid superclass index %u in class file %s", |
2633 super_class_index, | |
2634 CHECK_(nullHandle)); | |
2635 // The class name should be legal because it is checked when parsing constant pool. | |
2636 // However, make sure it is not an array type. | |
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2637 bool is_array = false; |
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2638 if (cp->tag_at(super_class_index).is_klass()) { |
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2639 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
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2640 if (_need_verify) |
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2641 is_array = super_klass->oop_is_array(); |
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2642 } else if (_need_verify) { |
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2643 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
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2644 } |
0 | 2645 if (_need_verify) { |
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2646 guarantee_property(!is_array, |
0 | 2647 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
2648 } | |
2649 } | |
2650 | |
2651 // Interfaces | |
2652 u2 itfs_len = cfs->get_u2_fast(); | |
2653 objArrayHandle local_interfaces; | |
2654 if (itfs_len == 0) { | |
2655 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
2656 } else { | |
2657 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle)); | |
2658 } | |
2659 | |
2660 // Fields (offsets are filled in later) | |
2661 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
2662 objArrayHandle fields_annotations; | |
2663 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
2664 // Methods | |
2665 bool has_final_method = false; | |
2666 AccessFlags promoted_flags; | |
2667 promoted_flags.set_flags(0); | |
2668 // These need to be oop pointers because they are allocated lazily | |
2669 // inside parse_methods inside a nested HandleMark | |
2670 objArrayOop methods_annotations_oop = NULL; | |
2671 objArrayOop methods_parameter_annotations_oop = NULL; | |
2672 objArrayOop methods_default_annotations_oop = NULL; | |
2673 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
2674 &promoted_flags, | |
2675 &has_final_method, | |
2676 &methods_annotations_oop, | |
2677 &methods_parameter_annotations_oop, | |
2678 &methods_default_annotations_oop, | |
2679 CHECK_(nullHandle)); | |
2680 | |
2681 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
2682 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
2683 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
2684 | |
2685 // We check super class after class file is parsed and format is checked | |
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2686 if (super_class_index > 0 && super_klass.is_null()) { |
0 | 2687 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); |
2688 if (access_flags.is_interface()) { | |
2689 // Before attempting to resolve the superclass, check for class format | |
2690 // errors not checked yet. | |
2691 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
2692 "Interfaces must have java.lang.Object as superclass in class file %s", | |
2693 CHECK_(nullHandle)); | |
2694 } | |
2695 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
2696 sk, | |
2697 class_loader, | |
2698 protection_domain, | |
2699 true, | |
2700 CHECK_(nullHandle)); | |
2701 KlassHandle kh (THREAD, k); | |
2702 super_klass = instanceKlassHandle(THREAD, kh()); | |
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2703 if (LinkWellKnownClasses) // my super class is well known to me |
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2704 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
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2705 } |
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2706 if (super_klass.not_null()) { |
0 | 2707 if (super_klass->is_interface()) { |
2708 ResourceMark rm(THREAD); | |
2709 Exceptions::fthrow( | |
2710 THREAD_AND_LOCATION, | |
2711 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
2712 "class %s has interface %s as super class", | |
2713 class_name->as_klass_external_name(), | |
2714 super_klass->external_name() | |
2715 ); | |
2716 return nullHandle; | |
2717 } | |
2718 // Make sure super class is not final | |
2719 if (super_klass->is_final()) { | |
2720 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
2721 } | |
2722 } | |
2723 | |
2724 // Compute the transitive list of all unique interfaces implemented by this class | |
2725 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
2726 | |
2727 // sort methods | |
2728 typeArrayHandle method_ordering = sort_methods(methods, | |
2729 methods_annotations, | |
2730 methods_parameter_annotations, | |
2731 methods_default_annotations, | |
2732 CHECK_(nullHandle)); | |
2733 | |
2734 // promote flags from parse_methods() to the klass' flags | |
2735 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
2736 | |
2737 // Size of Java vtable (in words) | |
2738 int vtable_size = 0; | |
2739 int itable_size = 0; | |
2740 int num_miranda_methods = 0; | |
2741 | |
2742 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
2743 num_miranda_methods, | |
2744 super_klass(), | |
2745 methods(), | |
2746 access_flags, | |
2747 class_loader(), | |
2748 class_name(), | |
2749 local_interfaces()); | |
2750 | |
2751 // Size of Java itable (in words) | |
2752 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
2753 | |
2754 // Field size and offset computation | |
2755 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
2756 #ifndef PRODUCT | |
2757 int orig_nonstatic_field_size = 0; | |
2758 #endif | |
2759 int static_field_size = 0; | |
2760 int next_static_oop_offset; | |
2761 int next_static_double_offset; | |
2762 int next_static_word_offset; | |
2763 int next_static_short_offset; | |
2764 int next_static_byte_offset; | |
2765 int next_static_type_offset; | |
2766 int next_nonstatic_oop_offset; | |
2767 int next_nonstatic_double_offset; | |
2768 int next_nonstatic_word_offset; | |
2769 int next_nonstatic_short_offset; | |
2770 int next_nonstatic_byte_offset; | |
2771 int next_nonstatic_type_offset; | |
2772 int first_nonstatic_oop_offset; | |
2773 int first_nonstatic_field_offset; | |
2774 int next_nonstatic_field_offset; | |
2775 | |
2776 // Calculate the starting byte offsets | |
2777 next_static_oop_offset = (instanceKlass::header_size() + | |
2778 align_object_offset(vtable_size) + | |
2779 align_object_offset(itable_size)) * wordSize; | |
2780 next_static_double_offset = next_static_oop_offset + | |
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2781 (fac.static_oop_count * heapOopSize); |
0 | 2782 if ( fac.static_double_count && |
2783 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
2784 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
2785 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
2786 } | |
2787 | |
2788 next_static_word_offset = next_static_double_offset + | |
2789 (fac.static_double_count * BytesPerLong); | |
2790 next_static_short_offset = next_static_word_offset + | |
2791 (fac.static_word_count * BytesPerInt); | |
2792 next_static_byte_offset = next_static_short_offset + | |
2793 (fac.static_short_count * BytesPerShort); | |
2794 next_static_type_offset = align_size_up((next_static_byte_offset + | |
2795 fac.static_byte_count ), wordSize ); | |
2796 static_field_size = (next_static_type_offset - | |
2797 next_static_oop_offset) / wordSize; | |
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2798 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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2799 nonstatic_field_size * heapOopSize; |
0 | 2800 next_nonstatic_field_offset = first_nonstatic_field_offset; |
2801 | |
2802 // Add fake fields for java.lang.Class instances (also see below) | |
2803 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2804 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
2805 } | |
2806 | |
2807 // Add a fake "discovered" field if it is not present | |
2808 // for compatibility with earlier jdk's. | |
2809 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
2810 && class_loader.is_null()) { | |
2811 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
2812 } | |
2813 // end of "discovered" field compactibility fix | |
2814 | |
2815 int nonstatic_double_count = fac.nonstatic_double_count; | |
2816 int nonstatic_word_count = fac.nonstatic_word_count; | |
2817 int nonstatic_short_count = fac.nonstatic_short_count; | |
2818 int nonstatic_byte_count = fac.nonstatic_byte_count; | |
2819 int nonstatic_oop_count = fac.nonstatic_oop_count; | |
2820 | |
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2821 bool super_has_nonstatic_fields = |
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2822 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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2823 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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2824 ((nonstatic_double_count + nonstatic_word_count + |
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2825 nonstatic_short_count + nonstatic_byte_count + |
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2826 nonstatic_oop_count) != 0); |
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2827 |
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2828 |
0 | 2829 // Prepare list of oops for oop maps generation. |
2830 u2* nonstatic_oop_offsets; | |
2831 u2* nonstatic_oop_length; | |
2832 int nonstatic_oop_map_count = 0; | |
2833 | |
2834 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2835 THREAD, u2, nonstatic_oop_count+1); | |
2836 nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2837 THREAD, u2, nonstatic_oop_count+1); | |
2838 | |
2839 // Add fake fields for java.lang.Class instances (also see above). | |
2840 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
2841 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
2842 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
2843 nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset; | |
2844 int fake_oop_count = (( next_nonstatic_field_offset - | |
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2845 first_nonstatic_field_offset ) / heapOopSize); |
0 | 2846 nonstatic_oop_length [0] = (u2)fake_oop_count; |
2847 nonstatic_oop_map_count = 1; | |
2848 nonstatic_oop_count -= fake_oop_count; | |
2849 first_nonstatic_oop_offset = first_nonstatic_field_offset; | |
2850 } else { | |
2851 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
2852 } | |
2853 | |
2854 #ifndef PRODUCT | |
2855 if( PrintCompactFieldsSavings ) { | |
2856 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
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2857 (nonstatic_oop_count * heapOopSize); |
0 | 2858 if ( nonstatic_double_count > 0 ) { |
2859 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
2860 } | |
2861 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
2862 (nonstatic_double_count * BytesPerLong); | |
2863 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
2864 (nonstatic_word_count * BytesPerInt); | |
2865 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
2866 (nonstatic_short_count * BytesPerShort); | |
2867 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
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2868 nonstatic_byte_count ), heapOopSize ); |
0 | 2869 orig_nonstatic_field_size = nonstatic_field_size + |
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2870 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
0 | 2871 } |
2872 #endif | |
2873 bool compact_fields = CompactFields; | |
2874 int allocation_style = FieldsAllocationStyle; | |
2875 if( allocation_style < 0 || allocation_style > 1 ) { // Out of range? | |
2876 assert(false, "0 <= FieldsAllocationStyle <= 1"); | |
2877 allocation_style = 1; // Optimistic | |
2878 } | |
2879 | |
2880 // The next classes have predefined hard-coded fields offsets | |
2881 // (see in JavaClasses::compute_hard_coded_offsets()). | |
2882 // Use default fields allocation order for them. | |
2883 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
2884 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
2885 class_name() == vmSymbols::java_lang_Class() || | |
2886 class_name() == vmSymbols::java_lang_ClassLoader() || | |
2887 class_name() == vmSymbols::java_lang_ref_Reference() || | |
2888 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
2889 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
2890 class_name() == vmSymbols::java_lang_String() || | |
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2891 class_name() == vmSymbols::java_lang_Throwable() || |
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2892 class_name() == vmSymbols::java_lang_Boolean() || |
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2893 class_name() == vmSymbols::java_lang_Character() || |
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2894 class_name() == vmSymbols::java_lang_Float() || |
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2895 class_name() == vmSymbols::java_lang_Double() || |
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2896 class_name() == vmSymbols::java_lang_Byte() || |
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2897 class_name() == vmSymbols::java_lang_Short() || |
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2898 class_name() == vmSymbols::java_lang_Integer() || |
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2899 class_name() == vmSymbols::java_lang_Long())) { |
0 | 2900 allocation_style = 0; // Allocate oops first |
2901 compact_fields = false; // Don't compact fields | |
2902 } | |
2903 | |
2904 if( allocation_style == 0 ) { | |
2905 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
2906 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
2907 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
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2908 (nonstatic_oop_count * heapOopSize); |
0 | 2909 } else if( allocation_style == 1 ) { |
2910 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
2911 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
2912 } else { | |
2913 ShouldNotReachHere(); | |
2914 } | |
2915 | |
2916 int nonstatic_oop_space_count = 0; | |
2917 int nonstatic_word_space_count = 0; | |
2918 int nonstatic_short_space_count = 0; | |
2919 int nonstatic_byte_space_count = 0; | |
2920 int nonstatic_oop_space_offset; | |
2921 int nonstatic_word_space_offset; | |
2922 int nonstatic_short_space_offset; | |
2923 int nonstatic_byte_space_offset; | |
2924 | |
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2925 if( nonstatic_double_count > 0 ) { |
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2926 int offset = next_nonstatic_double_offset; |
0 | 2927 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
2928 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
2929 // Allocate available fields into the gap before double field. | |
2930 int length = next_nonstatic_double_offset - offset; | |
2931 assert(length == BytesPerInt, ""); | |
2932 nonstatic_word_space_offset = offset; | |
2933 if( nonstatic_word_count > 0 ) { | |
2934 nonstatic_word_count -= 1; | |
2935 nonstatic_word_space_count = 1; // Only one will fit | |
2936 length -= BytesPerInt; | |
2937 offset += BytesPerInt; | |
2938 } | |
2939 nonstatic_short_space_offset = offset; | |
2940 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
2941 nonstatic_short_count -= 1; | |
2942 nonstatic_short_space_count += 1; | |
2943 length -= BytesPerShort; | |
2944 offset += BytesPerShort; | |
2945 } | |
2946 nonstatic_byte_space_offset = offset; | |
2947 while( length > 0 && nonstatic_byte_count > 0 ) { | |
2948 nonstatic_byte_count -= 1; | |
2949 nonstatic_byte_space_count += 1; | |
2950 length -= 1; | |
2951 } | |
2952 // Allocate oop field in the gap if there are no other fields for that. | |
2953 nonstatic_oop_space_offset = offset; | |
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2954 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
0 | 2955 allocation_style != 0 ) { // when oop fields not first |
2956 nonstatic_oop_count -= 1; | |
2957 nonstatic_oop_space_count = 1; // Only one will fit | |
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2958 length -= heapOopSize; |
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2959 offset += heapOopSize; |
0 | 2960 } |
2961 } | |
2962 } | |
2963 | |
2964 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
2965 (nonstatic_double_count * BytesPerLong); | |
2966 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
2967 (nonstatic_word_count * BytesPerInt); | |
2968 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
2969 (nonstatic_short_count * BytesPerShort); | |
2970 | |
2971 int notaligned_offset; | |
2972 if( allocation_style == 0 ) { | |
2973 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
2974 } else { // allocation_style == 1 | |
2975 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
2976 if( nonstatic_oop_count > 0 ) { | |
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2977 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
0 | 2978 } |
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2979 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
0 | 2980 } |
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2981 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
0 | 2982 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
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2983 - first_nonstatic_field_offset)/heapOopSize); |
0 | 2984 |
2985 // Iterate over fields again and compute correct offsets. | |
2986 // The field allocation type was temporarily stored in the offset slot. | |
2987 // oop fields are located before non-oop fields (static and non-static). | |
2988 int len = fields->length(); | |
2989 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
2990 int real_offset; | |
2991 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4); | |
2992 switch (atype) { | |
2993 case STATIC_OOP: | |
2994 real_offset = next_static_oop_offset; | |
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2995 next_static_oop_offset += heapOopSize; |
0 | 2996 break; |
2997 case STATIC_BYTE: | |
2998 real_offset = next_static_byte_offset; | |
2999 next_static_byte_offset += 1; | |
3000 break; | |
3001 case STATIC_SHORT: | |
3002 real_offset = next_static_short_offset; | |
3003 next_static_short_offset += BytesPerShort; | |
3004 break; | |
3005 case STATIC_WORD: | |
3006 real_offset = next_static_word_offset; | |
3007 next_static_word_offset += BytesPerInt; | |
3008 break; | |
3009 case STATIC_ALIGNED_DOUBLE: | |
3010 case STATIC_DOUBLE: | |
3011 real_offset = next_static_double_offset; | |
3012 next_static_double_offset += BytesPerLong; | |
3013 break; | |
3014 case NONSTATIC_OOP: | |
3015 if( nonstatic_oop_space_count > 0 ) { | |
3016 real_offset = nonstatic_oop_space_offset; | |
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3017 nonstatic_oop_space_offset += heapOopSize; |
0 | 3018 nonstatic_oop_space_count -= 1; |
3019 } else { | |
3020 real_offset = next_nonstatic_oop_offset; | |
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3021 next_nonstatic_oop_offset += heapOopSize; |
0 | 3022 } |
3023 // Update oop maps | |
3024 if( nonstatic_oop_map_count > 0 && | |
3025 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
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3026 (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * heapOopSize) ) { |
0 | 3027 // Extend current oop map |
3028 nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1; | |
3029 } else { | |
3030 // Create new oop map | |
3031 nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset; | |
3032 nonstatic_oop_length [nonstatic_oop_map_count] = 1; | |
3033 nonstatic_oop_map_count += 1; | |
3034 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
3035 first_nonstatic_oop_offset = real_offset; | |
3036 } | |
3037 } | |
3038 break; | |
3039 case NONSTATIC_BYTE: | |
3040 if( nonstatic_byte_space_count > 0 ) { | |
3041 real_offset = nonstatic_byte_space_offset; | |
3042 nonstatic_byte_space_offset += 1; | |
3043 nonstatic_byte_space_count -= 1; | |
3044 } else { | |
3045 real_offset = next_nonstatic_byte_offset; | |
3046 next_nonstatic_byte_offset += 1; | |
3047 } | |
3048 break; | |
3049 case NONSTATIC_SHORT: | |
3050 if( nonstatic_short_space_count > 0 ) { | |
3051 real_offset = nonstatic_short_space_offset; | |
3052 nonstatic_short_space_offset += BytesPerShort; | |
3053 nonstatic_short_space_count -= 1; | |
3054 } else { | |
3055 real_offset = next_nonstatic_short_offset; | |
3056 next_nonstatic_short_offset += BytesPerShort; | |
3057 } | |
3058 break; | |
3059 case NONSTATIC_WORD: | |
3060 if( nonstatic_word_space_count > 0 ) { | |
3061 real_offset = nonstatic_word_space_offset; | |
3062 nonstatic_word_space_offset += BytesPerInt; | |
3063 nonstatic_word_space_count -= 1; | |
3064 } else { | |
3065 real_offset = next_nonstatic_word_offset; | |
3066 next_nonstatic_word_offset += BytesPerInt; | |
3067 } | |
3068 break; | |
3069 case NONSTATIC_ALIGNED_DOUBLE: | |
3070 case NONSTATIC_DOUBLE: | |
3071 real_offset = next_nonstatic_double_offset; | |
3072 next_nonstatic_double_offset += BytesPerLong; | |
3073 break; | |
3074 default: | |
3075 ShouldNotReachHere(); | |
3076 } | |
3077 fields->short_at_put(i+4, extract_low_short_from_int(real_offset) ); | |
3078 fields->short_at_put(i+5, extract_high_short_from_int(real_offset) ); | |
3079 } | |
3080 | |
3081 // Size of instances | |
3082 int instance_size; | |
3083 | |
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3084 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
0 | 3085 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
3086 | |
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3087 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 | 3088 |
3089 // Size of non-static oop map blocks (in words) allocated at end of klass | |
3090 int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset); | |
3091 | |
3092 // Compute reference type | |
3093 ReferenceType rt; | |
3094 if (super_klass() == NULL) { | |
3095 rt = REF_NONE; | |
3096 } else { | |
3097 rt = super_klass->reference_type(); | |
3098 } | |
3099 | |
3100 // We can now create the basic klassOop for this klass | |
3101 klassOop ik = oopFactory::new_instanceKlass( | |
3102 vtable_size, itable_size, | |
3103 static_field_size, nonstatic_oop_map_size, | |
3104 rt, CHECK_(nullHandle)); | |
3105 instanceKlassHandle this_klass (THREAD, ik); | |
3106 | |
3107 assert(this_klass->static_field_size() == static_field_size && | |
3108 this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check"); | |
3109 | |
3110 // Fill in information already parsed | |
3111 this_klass->set_access_flags(access_flags); | |
3112 jint lh = Klass::instance_layout_helper(instance_size, false); | |
3113 this_klass->set_layout_helper(lh); | |
3114 assert(this_klass->oop_is_instance(), "layout is correct"); | |
3115 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
3116 // Not yet: supers are done below to support the new subtype-checking fields | |
3117 //this_klass->set_super(super_klass()); | |
3118 this_klass->set_class_loader(class_loader()); | |
3119 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
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3120 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
0 | 3121 this_klass->set_static_oop_field_size(fac.static_oop_count); |
3122 cp->set_pool_holder(this_klass()); | |
3123 this_klass->set_constants(cp()); | |
3124 this_klass->set_local_interfaces(local_interfaces()); | |
3125 this_klass->set_fields(fields()); | |
3126 this_klass->set_methods(methods()); | |
3127 if (has_final_method) { | |
3128 this_klass->set_has_final_method(); | |
3129 } | |
3130 this_klass->set_method_ordering(method_ordering()); | |
3131 this_klass->set_initial_method_idnum(methods->length()); | |
3132 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
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3133 if (LinkWellKnownClasses) // I am well known to myself |
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3134 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
0 | 3135 this_klass->set_protection_domain(protection_domain()); |
3136 this_klass->set_fields_annotations(fields_annotations()); | |
3137 this_klass->set_methods_annotations(methods_annotations()); | |
3138 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
3139 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
3140 | |
3141 this_klass->set_minor_version(minor_version); | |
3142 this_klass->set_major_version(major_version); | |
3143 | |
3144 if (cached_class_file_bytes != NULL) { | |
3145 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
3146 this_klass->set_cached_class_file(cached_class_file_bytes, | |
3147 cached_class_file_length); | |
3148 } | |
3149 | |
3150 // Miranda methods | |
3151 if ((num_miranda_methods > 0) || | |
3152 // if this class introduced new miranda methods or | |
3153 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
3154 // super class exists and this class inherited miranda methods | |
3155 ) { | |
3156 this_klass->set_has_miranda_methods(); // then set a flag | |
3157 } | |
3158 | |
3159 // Additional attributes | |
3160 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
3161 | |
3162 // Make sure this is the end of class file stream | |
3163 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
3164 | |
3165 // Initialize static fields | |
3166 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
3167 | |
3168 // VerifyOops believes that once this has been set, the object is completely loaded. | |
3169 // Compute transitive closure of interfaces this class implements | |
3170 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
3171 | |
3172 // Fill in information needed to compute superclasses. | |
3173 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
3174 | |
3175 // Initialize itable offset tables | |
3176 klassItable::setup_itable_offset_table(this_klass); | |
3177 | |
3178 // Do final class setup | |
3179 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length); | |
3180 | |
3181 set_precomputed_flags(this_klass); | |
3182 | |
3183 // reinitialize modifiers, using the InnerClasses attribute | |
3184 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
3185 this_klass->set_modifier_flags(computed_modifiers); | |
3186 | |
3187 // check if this class can access its super class | |
3188 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
3189 | |
3190 // check if this class can access its superinterfaces | |
3191 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
3192 | |
3193 // check if this class overrides any final method | |
3194 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
3195 | |
3196 // check that if this class is an interface then it doesn't have static methods | |
3197 if (this_klass->is_interface()) { | |
3198 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
3199 } | |
3200 | |
3201 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
3202 false /* not shared class */); | |
3203 | |
3204 if (TraceClassLoading) { | |
3205 // print in a single call to reduce interleaving of output | |
3206 if (cfs->source() != NULL) { | |
3207 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3208 cfs->source()); | |
3209 } else if (class_loader.is_null()) { | |
3210 if (THREAD->is_Java_thread()) { | |
3211 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
3212 tty->print("[Loaded %s by instance of %s]\n", | |
3213 this_klass->external_name(), | |
3214 instanceKlass::cast(caller)->external_name()); | |
3215 } else { | |
3216 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
3217 } | |
3218 } else { | |
3219 ResourceMark rm; | |
3220 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3221 instanceKlass::cast(class_loader->klass())->external_name()); | |
3222 } | |
3223 } | |
3224 | |
3225 if (TraceClassResolution) { | |
3226 // print out the superclass. | |
3227 const char * from = Klass::cast(this_klass())->external_name(); | |
3228 if (this_klass->java_super() != NULL) { | |
3229 tty->print("RESOLVE %s %s\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); | |
3230 } | |
3231 // print out each of the interface classes referred to by this class. | |
3232 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
3233 if (!local_interfaces.is_null()) { | |
3234 int length = local_interfaces->length(); | |
3235 for (int i = 0; i < length; i++) { | |
3236 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3237 instanceKlass* to_class = instanceKlass::cast(k); | |
3238 const char * to = to_class->external_name(); | |
3239 tty->print("RESOLVE %s %s\n", from, to); | |
3240 } | |
3241 } | |
3242 } | |
3243 | |
3244 #ifndef PRODUCT | |
3245 if( PrintCompactFieldsSavings ) { | |
3246 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
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3247 tty->print("[Saved %d of %d bytes in %s]\n", |
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3248 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
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3249 orig_nonstatic_field_size*heapOopSize, |
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3250 this_klass->external_name()); |
0 | 3251 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
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3252 tty->print("[Wasted %d over %d bytes in %s]\n", |
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3253 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
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3254 orig_nonstatic_field_size*heapOopSize, |
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3255 this_klass->external_name()); |
0 | 3256 } |
3257 } | |
3258 #endif | |
3259 | |
3260 // preserve result across HandleMark | |
3261 preserve_this_klass = this_klass(); | |
3262 } | |
3263 | |
3264 // Create new handle outside HandleMark | |
3265 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
3266 debug_only(this_klass->as_klassOop()->verify();) | |
3267 | |
3268 return this_klass; | |
3269 } | |
3270 | |
3271 | |
3272 int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) { | |
3273 int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size(); | |
3274 if (nonstatic_oop_map_count > 0) { | |
3275 // We have oops to add to map | |
3276 if (map_size == 0) { | |
3277 map_size = nonstatic_oop_map_count; | |
3278 } else { | |
3279 // Check whether we should add a new map block or whether the last one can be extended | |
3280 OopMapBlock* first_map = super->start_of_nonstatic_oop_maps(); | |
3281 OopMapBlock* last_map = first_map + map_size - 1; | |
3282 | |
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3283 int next_offset = last_map->offset() + (last_map->length() * heapOopSize); |
0 | 3284 if (next_offset == first_nonstatic_oop_offset) { |
3285 // There is no gap bettwen superklass's last oop field and first | |
3286 // local oop field, merge maps. | |
3287 nonstatic_oop_map_count -= 1; | |
3288 } else { | |
3289 // Superklass didn't end with a oop field, add extra maps | |
3290 assert(next_offset<first_nonstatic_oop_offset, "just checking"); | |
3291 } | |
3292 map_size += nonstatic_oop_map_count; | |
3293 } | |
3294 } | |
3295 return map_size; | |
3296 } | |
3297 | |
3298 | |
3299 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
3300 int nonstatic_oop_map_count, | |
3301 u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) { | |
3302 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); | |
3303 OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size(); | |
3304 instanceKlass* super = k->superklass(); | |
3305 if (super != NULL) { | |
3306 int super_oop_map_size = super->nonstatic_oop_map_size(); | |
3307 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); | |
3308 // Copy maps from superklass | |
3309 while (super_oop_map_size-- > 0) { | |
3310 *this_oop_map++ = *super_oop_map++; | |
3311 } | |
3312 } | |
3313 if (nonstatic_oop_map_count > 0) { | |
3314 if (this_oop_map + nonstatic_oop_map_count > last_oop_map) { | |
3315 // Calculated in compute_oop_map_size() number of oop maps is less then | |
3316 // collected oop maps since there is no gap between superklass's last oop | |
3317 // field and first local oop field. Extend the last oop map copied | |
3318 // from the superklass instead of creating new one. | |
3319 nonstatic_oop_map_count--; | |
3320 nonstatic_oop_offsets++; | |
3321 this_oop_map--; | |
3322 this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++); | |
3323 this_oop_map++; | |
3324 } | |
3325 assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking"); | |
3326 // Add new map blocks, fill them | |
3327 while (nonstatic_oop_map_count-- > 0) { | |
3328 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
3329 this_oop_map->set_length(*nonstatic_oop_length++); | |
3330 this_oop_map++; | |
3331 } | |
3332 } | |
3333 } | |
3334 | |
3335 | |
3336 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
3337 klassOop super = k->super(); | |
3338 | |
3339 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
3340 // in which case we don't have to register objects as finalizable | |
3341 if (!_has_empty_finalizer) { | |
3342 if (_has_finalizer || | |
3343 (super != NULL && super->klass_part()->has_finalizer())) { | |
3344 k->set_has_finalizer(); | |
3345 } | |
3346 } | |
3347 | |
3348 #ifdef ASSERT | |
3349 bool f = false; | |
3350 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
3351 vmSymbols::void_method_signature()); | |
3352 if (m != NULL && !m->is_empty_method()) { | |
3353 f = true; | |
3354 } | |
3355 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
3356 #endif | |
3357 | |
3358 // Check if this klass supports the java.lang.Cloneable interface | |
3359 if (SystemDictionary::cloneable_klass_loaded()) { | |
3360 if (k->is_subtype_of(SystemDictionary::cloneable_klass())) { | |
3361 k->set_is_cloneable(); | |
3362 } | |
3363 } | |
3364 | |
3365 // Check if this klass has a vanilla default constructor | |
3366 if (super == NULL) { | |
3367 // java.lang.Object has empty default constructor | |
3368 k->set_has_vanilla_constructor(); | |
3369 } else { | |
3370 if (Klass::cast(super)->has_vanilla_constructor() && | |
3371 _has_vanilla_constructor) { | |
3372 k->set_has_vanilla_constructor(); | |
3373 } | |
3374 #ifdef ASSERT | |
3375 bool v = false; | |
3376 if (Klass::cast(super)->has_vanilla_constructor()) { | |
3377 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
3378 ), vmSymbols::void_method_signature()); | |
3379 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
3380 v = true; | |
3381 } | |
3382 } | |
3383 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
3384 #endif | |
3385 } | |
3386 | |
3387 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
3388 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
3389 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
3390 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
3391 || k->is_abstract() || k->is_interface() | |
3392 || (k->name() == vmSymbols::java_lang_Class() | |
3393 && k->class_loader() == NULL) | |
3394 || k->size_helper() >= FastAllocateSizeLimit) { | |
3395 // Forbid fast-path allocation. | |
3396 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
3397 k->set_layout_helper(lh); | |
3398 } | |
3399 } | |
3400 | |
3401 | |
3402 // utility method for appending and array with check for duplicates | |
3403 | |
3404 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
3405 // iterate over new interfaces | |
3406 for (int i = 0; i < ifs->length(); i++) { | |
3407 oop e = ifs->obj_at(i); | |
3408 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
3409 // check for duplicates | |
3410 bool duplicate = false; | |
3411 for (int j = 0; j < index; j++) { | |
3412 if (result->obj_at(j) == e) { | |
3413 duplicate = true; | |
3414 break; | |
3415 } | |
3416 } | |
3417 // add new interface | |
3418 if (!duplicate) { | |
3419 result->obj_at_put(index++, e); | |
3420 } | |
3421 } | |
3422 } | |
3423 | |
3424 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
3425 // Compute maximum size for transitive interfaces | |
3426 int max_transitive_size = 0; | |
3427 int super_size = 0; | |
3428 // Add superclass transitive interfaces size | |
3429 if (super.not_null()) { | |
3430 super_size = super->transitive_interfaces()->length(); | |
3431 max_transitive_size += super_size; | |
3432 } | |
3433 // Add local interfaces' super interfaces | |
3434 int local_size = local_ifs->length(); | |
3435 for (int i = 0; i < local_size; i++) { | |
3436 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3437 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
3438 } | |
3439 // Finally add local interfaces | |
3440 max_transitive_size += local_size; | |
3441 // Construct array | |
3442 objArrayHandle result; | |
3443 if (max_transitive_size == 0) { | |
3444 // no interfaces, use canonicalized array | |
3445 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
3446 } else if (max_transitive_size == super_size) { | |
3447 // no new local interfaces added, share superklass' transitive interface array | |
3448 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
3449 } else if (max_transitive_size == local_size) { | |
3450 // only local interfaces added, share local interface array | |
3451 result = local_ifs; | |
3452 } else { | |
3453 objArrayHandle nullHandle; | |
3454 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
3455 result = objArrayHandle(THREAD, new_objarray); | |
3456 int index = 0; | |
3457 // Copy down from superclass | |
3458 if (super.not_null()) { | |
3459 append_interfaces(result, index, super->transitive_interfaces()); | |
3460 } | |
3461 // Copy down from local interfaces' superinterfaces | |
3462 for (int i = 0; i < local_ifs->length(); i++) { | |
3463 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3464 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
3465 } | |
3466 // Finally add local interfaces | |
3467 append_interfaces(result, index, local_ifs()); | |
3468 | |
3469 // Check if duplicates were removed | |
3470 if (index != max_transitive_size) { | |
3471 assert(index < max_transitive_size, "just checking"); | |
3472 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
3473 for (int i = 0; i < index; i++) { | |
3474 oop e = result->obj_at(i); | |
3475 assert(e != NULL, "just checking"); | |
3476 new_result->obj_at_put(i, e); | |
3477 } | |
3478 result = objArrayHandle(THREAD, new_result); | |
3479 } | |
3480 } | |
3481 return result; | |
3482 } | |
3483 | |
3484 | |
3485 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
3486 klassOop super = this_klass->super(); | |
3487 if ((super != NULL) && | |
3488 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
3489 ResourceMark rm(THREAD); | |
3490 Exceptions::fthrow( | |
3491 THREAD_AND_LOCATION, | |
3492 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3493 "class %s cannot access its superclass %s", | |
3494 this_klass->external_name(), | |
3495 instanceKlass::cast(super)->external_name() | |
3496 ); | |
3497 return; | |
3498 } | |
3499 } | |
3500 | |
3501 | |
3502 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
3503 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
3504 int lng = local_interfaces->length(); | |
3505 for (int i = lng - 1; i >= 0; i--) { | |
3506 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3507 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
3508 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
3509 ResourceMark rm(THREAD); | |
3510 Exceptions::fthrow( | |
3511 THREAD_AND_LOCATION, | |
3512 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3513 "class %s cannot access its superinterface %s", | |
3514 this_klass->external_name(), | |
3515 instanceKlass::cast(k)->external_name() | |
3516 ); | |
3517 return; | |
3518 } | |
3519 } | |
3520 } | |
3521 | |
3522 | |
3523 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
3524 objArrayHandle methods (THREAD, this_klass->methods()); | |
3525 int num_methods = methods->length(); | |
3526 | |
3527 // go thru each method and check if it overrides a final method | |
3528 for (int index = 0; index < num_methods; index++) { | |
3529 methodOop m = (methodOop)methods->obj_at(index); | |
3530 | |
3531 // skip private, static and <init> methods | |
3532 if ((!m->is_private()) && | |
3533 (!m->is_static()) && | |
3534 (m->name() != vmSymbols::object_initializer_name())) { | |
3535 | |
3536 symbolOop name = m->name(); | |
3537 symbolOop signature = m->signature(); | |
3538 klassOop k = this_klass->super(); | |
3539 methodOop super_m = NULL; | |
3540 while (k != NULL) { | |
3541 // skip supers that don't have final methods. | |
3542 if (k->klass_part()->has_final_method()) { | |
3543 // lookup a matching method in the super class hierarchy | |
3544 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
3545 if (super_m == NULL) { | |
3546 break; // didn't find any match; get out | |
3547 } | |
3548 | |
3549 if (super_m->is_final() && | |
3550 // matching method in super is final | |
3551 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
3552 super_m->method_holder(), | |
3553 super_m->method_holder(), | |
3554 super_m->access_flags(), false)) | |
3555 // this class can access super final method and therefore override | |
3556 ) { | |
3557 ResourceMark rm(THREAD); | |
3558 Exceptions::fthrow( | |
3559 THREAD_AND_LOCATION, | |
3560 vmSymbolHandles::java_lang_VerifyError(), | |
3561 "class %s overrides final method %s.%s", | |
3562 this_klass->external_name(), | |
3563 name->as_C_string(), | |
3564 signature->as_C_string() | |
3565 ); | |
3566 return; | |
3567 } | |
3568 | |
3569 // continue to look from super_m's holder's super. | |
3570 k = instanceKlass::cast(super_m->method_holder())->super(); | |
3571 continue; | |
3572 } | |
3573 | |
3574 k = k->klass_part()->super(); | |
3575 } | |
3576 } | |
3577 } | |
3578 } | |
3579 | |
3580 | |
3581 // assumes that this_klass is an interface | |
3582 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
3583 assert(this_klass->is_interface(), "not an interface"); | |
3584 objArrayHandle methods (THREAD, this_klass->methods()); | |
3585 int num_methods = methods->length(); | |
3586 | |
3587 for (int index = 0; index < num_methods; index++) { | |
3588 methodOop m = (methodOop)methods->obj_at(index); | |
3589 // if m is static and not the init method, throw a verify error | |
3590 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
3591 ResourceMark rm(THREAD); | |
3592 Exceptions::fthrow( | |
3593 THREAD_AND_LOCATION, | |
3594 vmSymbolHandles::java_lang_VerifyError(), | |
3595 "Illegal static method %s in interface %s", | |
3596 m->name()->as_C_string(), | |
3597 this_klass->external_name() | |
3598 ); | |
3599 return; | |
3600 } | |
3601 } | |
3602 } | |
3603 | |
3604 // utility methods for format checking | |
3605 | |
3606 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
3607 if (!_need_verify) { return; } | |
3608 | |
3609 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
3610 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3611 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3612 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
3613 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3614 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
3615 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3616 | |
3617 if ((is_abstract && is_final) || | |
3618 (is_interface && !is_abstract) || | |
3619 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
3620 (!is_interface && major_gte_15 && is_annotation)) { | |
3621 ResourceMark rm(THREAD); | |
3622 Exceptions::fthrow( | |
3623 THREAD_AND_LOCATION, | |
3624 vmSymbolHandles::java_lang_ClassFormatError(), | |
3625 "Illegal class modifiers in class %s: 0x%X", | |
3626 _class_name->as_C_string(), flags | |
3627 ); | |
3628 return; | |
3629 } | |
3630 } | |
3631 | |
3632 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
3633 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3634 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3635 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3636 | |
3637 return ((is_public && is_protected) || | |
3638 (is_public && is_private) || | |
3639 (is_protected && is_private)); | |
3640 } | |
3641 | |
3642 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
176
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3643 u2 max_version = JDK_Version::is_gte_jdk17x_version() ? |
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|
3644 JAVA_MAX_SUPPORTED_VERSION : JAVA_6_VERSION; |
0 | 3645 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
176
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3646 (major <= max_version) && |
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|
3647 ((major != max_version) || |
0 | 3648 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
3649 } | |
3650 | |
3651 void ClassFileParser::verify_legal_field_modifiers( | |
3652 jint flags, bool is_interface, TRAPS) { | |
3653 if (!_need_verify) { return; } | |
3654 | |
3655 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3656 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3657 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3658 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3659 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3660 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
3661 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
3662 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3663 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3664 | |
3665 bool is_illegal = false; | |
3666 | |
3667 if (is_interface) { | |
3668 if (!is_public || !is_static || !is_final || is_private || | |
3669 is_protected || is_volatile || is_transient || | |
3670 (major_gte_15 && is_enum)) { | |
3671 is_illegal = true; | |
3672 } | |
3673 } else { // not interface | |
3674 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
3675 is_illegal = true; | |
3676 } | |
3677 } | |
3678 | |
3679 if (is_illegal) { | |
3680 ResourceMark rm(THREAD); | |
3681 Exceptions::fthrow( | |
3682 THREAD_AND_LOCATION, | |
3683 vmSymbolHandles::java_lang_ClassFormatError(), | |
3684 "Illegal field modifiers in class %s: 0x%X", | |
3685 _class_name->as_C_string(), flags); | |
3686 return; | |
3687 } | |
3688 } | |
3689 | |
3690 void ClassFileParser::verify_legal_method_modifiers( | |
3691 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
3692 if (!_need_verify) { return; } | |
3693 | |
3694 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3695 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3696 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3697 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3698 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
3699 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3700 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
3701 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
3702 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
3703 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3704 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
3705 | |
3706 bool is_illegal = false; | |
3707 | |
3708 if (is_interface) { | |
3709 if (!is_abstract || !is_public || is_static || is_final || | |
3710 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
3711 is_illegal = true; | |
3712 } | |
3713 } else { // not interface | |
3714 if (is_initializer) { | |
3715 if (is_static || is_final || is_synchronized || is_native || | |
3716 is_abstract || (major_gte_15 && is_bridge)) { | |
3717 is_illegal = true; | |
3718 } | |
3719 } else { // not initializer | |
3720 if (is_abstract) { | |
3721 if ((is_final || is_native || is_private || is_static || | |
3722 (major_gte_15 && (is_synchronized || is_strict)))) { | |
3723 is_illegal = true; | |
3724 } | |
3725 } | |
3726 if (has_illegal_visibility(flags)) { | |
3727 is_illegal = true; | |
3728 } | |
3729 } | |
3730 } | |
3731 | |
3732 if (is_illegal) { | |
3733 ResourceMark rm(THREAD); | |
3734 Exceptions::fthrow( | |
3735 THREAD_AND_LOCATION, | |
3736 vmSymbolHandles::java_lang_ClassFormatError(), | |
3737 "Method %s in class %s has illegal modifiers: 0x%X", | |
3738 name->as_C_string(), _class_name->as_C_string(), flags); | |
3739 return; | |
3740 } | |
3741 } | |
3742 | |
3743 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
3744 assert(_need_verify, "only called when _need_verify is true"); | |
3745 int i = 0; | |
3746 int count = length >> 2; | |
3747 for (int k=0; k<count; k++) { | |
3748 unsigned char b0 = buffer[i]; | |
3749 unsigned char b1 = buffer[i+1]; | |
3750 unsigned char b2 = buffer[i+2]; | |
3751 unsigned char b3 = buffer[i+3]; | |
3752 // For an unsigned char v, | |
3753 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
3754 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
3755 unsigned char res = b0 | b0 - 1 | | |
3756 b1 | b1 - 1 | | |
3757 b2 | b2 - 1 | | |
3758 b3 | b3 - 1; | |
3759 if (res >= 128) break; | |
3760 i += 4; | |
3761 } | |
3762 for(; i < length; i++) { | |
3763 unsigned short c; | |
3764 // no embedded zeros | |
3765 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3766 if(buffer[i] < 128) { | |
3767 continue; | |
3768 } | |
3769 if ((i + 5) < length) { // see if it's legal supplementary character | |
3770 if (UTF8::is_supplementary_character(&buffer[i])) { | |
3771 c = UTF8::get_supplementary_character(&buffer[i]); | |
3772 i += 5; | |
3773 continue; | |
3774 } | |
3775 } | |
3776 switch (buffer[i] >> 4) { | |
3777 default: break; | |
3778 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
3779 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3780 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
3781 c = (buffer[i] & 0x1F) << 6; | |
3782 i++; | |
3783 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
3784 c += buffer[i] & 0x3F; | |
3785 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
3786 // for classes with major > 47, c must a null or a character in its shortest form | |
3787 break; | |
3788 } | |
3789 } | |
3790 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3791 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
3792 c = (buffer[i] & 0xF) << 12; | |
3793 i += 2; | |
3794 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
3795 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
3796 if (_major_version <= 47 || c >= 0x800) { | |
3797 // for classes with major > 47, c must be in its shortest form | |
3798 break; | |
3799 } | |
3800 } | |
3801 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
3802 } // end of switch | |
3803 } // end of for | |
3804 } | |
3805 | |
3806 // Checks if name is a legal class name. | |
3807 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
3808 if (!_need_verify || _relax_verify) { return; } | |
3809 | |
3810 char buf[fixed_buffer_size]; | |
3811 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3812 unsigned int length = name->utf8_length(); | |
3813 bool legal = false; | |
3814 | |
3815 if (length > 0) { | |
3816 char* p; | |
3817 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
3818 p = skip_over_field_signature(bytes, false, length, CHECK); | |
3819 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3820 } else if (_major_version < JAVA_1_5_VERSION) { | |
3821 if (bytes[0] != '<') { | |
3822 p = skip_over_field_name(bytes, true, length); | |
3823 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3824 } | |
3825 } else { | |
3826 // 4900761: relax the constraints based on JSR202 spec | |
3827 // Class names may be drawn from the entire Unicode character set. | |
3828 // Identifiers between '/' must be unqualified names. | |
3829 // The utf8 string has been verified when parsing cpool entries. | |
3830 legal = verify_unqualified_name(bytes, length, LegalClass); | |
3831 } | |
3832 } | |
3833 if (!legal) { | |
3834 ResourceMark rm(THREAD); | |
3835 Exceptions::fthrow( | |
3836 THREAD_AND_LOCATION, | |
3837 vmSymbolHandles::java_lang_ClassFormatError(), | |
3838 "Illegal class name \"%s\" in class file %s", bytes, | |
3839 _class_name->as_C_string() | |
3840 ); | |
3841 return; | |
3842 } | |
3843 } | |
3844 | |
3845 // Checks if name is a legal field name. | |
3846 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
3847 if (!_need_verify || _relax_verify) { return; } | |
3848 | |
3849 char buf[fixed_buffer_size]; | |
3850 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3851 unsigned int length = name->utf8_length(); | |
3852 bool legal = false; | |
3853 | |
3854 if (length > 0) { | |
3855 if (_major_version < JAVA_1_5_VERSION) { | |
3856 if (bytes[0] != '<') { | |
3857 char* p = skip_over_field_name(bytes, false, length); | |
3858 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3859 } | |
3860 } else { | |
3861 // 4881221: relax the constraints based on JSR202 spec | |
3862 legal = verify_unqualified_name(bytes, length, LegalField); | |
3863 } | |
3864 } | |
3865 | |
3866 if (!legal) { | |
3867 ResourceMark rm(THREAD); | |
3868 Exceptions::fthrow( | |
3869 THREAD_AND_LOCATION, | |
3870 vmSymbolHandles::java_lang_ClassFormatError(), | |
3871 "Illegal field name \"%s\" in class %s", bytes, | |
3872 _class_name->as_C_string() | |
3873 ); | |
3874 return; | |
3875 } | |
3876 } | |
3877 | |
3878 // Checks if name is a legal method name. | |
3879 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
3880 if (!_need_verify || _relax_verify) { return; } | |
3881 | |
3882 assert(!name.is_null(), "method name is null"); | |
3883 char buf[fixed_buffer_size]; | |
3884 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3885 unsigned int length = name->utf8_length(); | |
3886 bool legal = false; | |
3887 | |
3888 if (length > 0) { | |
3889 if (bytes[0] == '<') { | |
3890 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
3891 legal = true; | |
3892 } | |
3893 } else if (_major_version < JAVA_1_5_VERSION) { | |
3894 char* p; | |
3895 p = skip_over_field_name(bytes, false, length); | |
3896 legal = (p != NULL) && ((p - bytes) == (int)length); | |
3897 } else { | |
3898 // 4881221: relax the constraints based on JSR202 spec | |
3899 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
3900 } | |
3901 } | |
3902 | |
3903 if (!legal) { | |
3904 ResourceMark rm(THREAD); | |
3905 Exceptions::fthrow( | |
3906 THREAD_AND_LOCATION, | |
3907 vmSymbolHandles::java_lang_ClassFormatError(), | |
3908 "Illegal method name \"%s\" in class %s", bytes, | |
3909 _class_name->as_C_string() | |
3910 ); | |
3911 return; | |
3912 } | |
3913 } | |
3914 | |
3915 | |
3916 // Checks if signature is a legal field signature. | |
3917 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
3918 if (!_need_verify) { return; } | |
3919 | |
3920 char buf[fixed_buffer_size]; | |
3921 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3922 unsigned int length = signature->utf8_length(); | |
3923 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
3924 | |
3925 if (p == NULL || (p - bytes) != (int)length) { | |
3926 ResourceMark rm(THREAD); | |
3927 Exceptions::fthrow( | |
3928 THREAD_AND_LOCATION, | |
3929 vmSymbolHandles::java_lang_ClassFormatError(), | |
3930 "Field \"%s\" in class %s has illegal signature \"%s\"", | |
3931 name->as_C_string(), _class_name->as_C_string(), bytes | |
3932 ); | |
3933 return; | |
3934 } | |
3935 } | |
3936 | |
3937 // Checks if signature is a legal method signature. | |
3938 // Returns number of parameters | |
3939 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
3940 if (!_need_verify) { | |
3941 // make sure caller's args_size will be less than 0 even for non-static | |
3942 // method so it will be recomputed in compute_size_of_parameters(). | |
3943 return -2; | |
3944 } | |
3945 | |
3946 unsigned int args_size = 0; | |
3947 char buf[fixed_buffer_size]; | |
3948 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
3949 unsigned int length = signature->utf8_length(); | |
3950 char* nextp; | |
3951 | |
3952 // The first character must be a '(' | |
3953 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
3954 length--; | |
3955 // Skip over legal field signatures | |
3956 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
3957 while ((length > 0) && (nextp != NULL)) { | |
3958 args_size++; | |
3959 if (p[0] == 'J' || p[0] == 'D') { | |
3960 args_size++; | |
3961 } | |
3962 length -= nextp - p; | |
3963 p = nextp; | |
3964 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
3965 } | |
3966 // The first non-signature thing better be a ')' | |
3967 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
3968 length--; | |
3969 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
3970 // All internal methods must return void | |
3971 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
3972 return args_size; | |
3973 } | |
3974 } else { | |
3975 // Now we better just have a return value | |
3976 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
3977 if (nextp && ((int)length == (nextp - p))) { | |
3978 return args_size; | |
3979 } | |
3980 } | |
3981 } | |
3982 } | |
3983 // Report error | |
3984 ResourceMark rm(THREAD); | |
3985 Exceptions::fthrow( | |
3986 THREAD_AND_LOCATION, | |
3987 vmSymbolHandles::java_lang_ClassFormatError(), | |
3988 "Method \"%s\" in class %s has illegal signature \"%s\"", | |
3989 name->as_C_string(), _class_name->as_C_string(), p | |
3990 ); | |
3991 return 0; | |
3992 } | |
3993 | |
3994 | |
3995 // Unqualified names may not contain the characters '.', ';', or '/'. | |
3996 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
3997 // Note that method names may not be <init> or <clinit> in this method. | |
3998 // Because these names have been checked as special cases before calling this method | |
3999 // in verify_legal_method_name. | |
4000 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
4001 jchar ch; | |
4002 | |
4003 for (char* p = name; p != name + length; ) { | |
4004 ch = *p; | |
4005 if (ch < 128) { | |
4006 p++; | |
4007 if (ch == '.' || ch == ';') { | |
4008 return false; // do not permit '.' or ';' | |
4009 } | |
4010 if (type != LegalClass && ch == '/') { | |
4011 return false; // do not permit '/' unless it's class name | |
4012 } | |
4013 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
4014 return false; // do not permit '<' or '>' in method names | |
4015 } | |
4016 } else { | |
4017 char* tmp_p = UTF8::next(p, &ch); | |
4018 p = tmp_p; | |
4019 } | |
4020 } | |
4021 return true; | |
4022 } | |
4023 | |
4024 | |
4025 // Take pointer to a string. Skip over the longest part of the string that could | |
4026 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
4027 // Return a pointer to just past the fieldname. | |
4028 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
4029 // being true, we saw consecutive slashes (meaning we were looking for a | |
4030 // qualified path but found something that was badly-formed). | |
4031 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
4032 char* p; | |
4033 jchar ch; | |
4034 jboolean last_is_slash = false; | |
4035 jboolean not_first_ch = false; | |
4036 | |
4037 for (p = name; p != name + length; not_first_ch = true) { | |
4038 char* old_p = p; | |
4039 ch = *p; | |
4040 if (ch < 128) { | |
4041 p++; | |
4042 // quick check for ascii | |
4043 if ((ch >= 'a' && ch <= 'z') || | |
4044 (ch >= 'A' && ch <= 'Z') || | |
4045 (ch == '_' || ch == '$') || | |
4046 (not_first_ch && ch >= '0' && ch <= '9')) { | |
4047 last_is_slash = false; | |
4048 continue; | |
4049 } | |
4050 if (slash_ok && ch == '/') { | |
4051 if (last_is_slash) { | |
4052 return NULL; // Don't permit consecutive slashes | |
4053 } | |
4054 last_is_slash = true; | |
4055 continue; | |
4056 } | |
4057 } else { | |
4058 jint unicode_ch; | |
4059 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
4060 p = tmp_p; | |
4061 last_is_slash = false; | |
4062 // Check if ch is Java identifier start or is Java identifier part | |
4063 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
4064 EXCEPTION_MARK; | |
4065 instanceKlassHandle klass (THREAD, SystemDictionary::char_klass()); | |
4066 | |
4067 // return value | |
4068 JavaValue result(T_BOOLEAN); | |
4069 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
4070 JavaCallArguments args; | |
4071 args.push_int(unicode_ch); | |
4072 | |
4073 // public static boolean isJavaIdentifierStart(char ch); | |
4074 JavaCalls::call_static(&result, | |
4075 klass, | |
4076 vmSymbolHandles::isJavaIdentifierStart_name(), | |
4077 vmSymbolHandles::int_bool_signature(), | |
4078 &args, | |
4079 THREAD); | |
4080 | |
4081 if (HAS_PENDING_EXCEPTION) { | |
4082 CLEAR_PENDING_EXCEPTION; | |
4083 return 0; | |
4084 } | |
4085 if (result.get_jboolean()) { | |
4086 continue; | |
4087 } | |
4088 | |
4089 if (not_first_ch) { | |
4090 // public static boolean isJavaIdentifierPart(char ch); | |
4091 JavaCalls::call_static(&result, | |
4092 klass, | |
4093 vmSymbolHandles::isJavaIdentifierPart_name(), | |
4094 vmSymbolHandles::int_bool_signature(), | |
4095 &args, | |
4096 THREAD); | |
4097 | |
4098 if (HAS_PENDING_EXCEPTION) { | |
4099 CLEAR_PENDING_EXCEPTION; | |
4100 return 0; | |
4101 } | |
4102 | |
4103 if (result.get_jboolean()) { | |
4104 continue; | |
4105 } | |
4106 } | |
4107 } | |
4108 return (not_first_ch) ? old_p : NULL; | |
4109 } | |
4110 return (not_first_ch) ? p : NULL; | |
4111 } | |
4112 | |
4113 | |
4114 // Take pointer to a string. Skip over the longest part of the string that could | |
4115 // be taken as a field signature. Allow "void" if void_ok. | |
4116 // Return a pointer to just past the signature. | |
4117 // Return NULL if no legal signature is found. | |
4118 char* ClassFileParser::skip_over_field_signature(char* signature, | |
4119 bool void_ok, | |
4120 unsigned int length, | |
4121 TRAPS) { | |
4122 unsigned int array_dim = 0; | |
4123 while (length > 0) { | |
4124 switch (signature[0]) { | |
4125 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
4126 case JVM_SIGNATURE_BOOLEAN: | |
4127 case JVM_SIGNATURE_BYTE: | |
4128 case JVM_SIGNATURE_CHAR: | |
4129 case JVM_SIGNATURE_SHORT: | |
4130 case JVM_SIGNATURE_INT: | |
4131 case JVM_SIGNATURE_FLOAT: | |
4132 case JVM_SIGNATURE_LONG: | |
4133 case JVM_SIGNATURE_DOUBLE: | |
4134 return signature + 1; | |
4135 case JVM_SIGNATURE_CLASS: { | |
4136 if (_major_version < JAVA_1_5_VERSION) { | |
4137 // Skip over the class name if one is there | |
4138 char* p = skip_over_field_name(signature + 1, true, --length); | |
4139 | |
4140 // The next character better be a semicolon | |
4141 if (p && (p - signature) > 1 && p[0] == ';') { | |
4142 return p + 1; | |
4143 } | |
4144 } else { | |
4145 // 4900761: For class version > 48, any unicode is allowed in class name. | |
4146 length--; | |
4147 signature++; | |
4148 while (length > 0 && signature[0] != ';') { | |
4149 if (signature[0] == '.') { | |
4150 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
4151 } | |
4152 length--; | |
4153 signature++; | |
4154 } | |
4155 if (signature[0] == ';') { return signature + 1; } | |
4156 } | |
4157 | |
4158 return NULL; | |
4159 } | |
4160 case JVM_SIGNATURE_ARRAY: | |
4161 array_dim++; | |
4162 if (array_dim > 255) { | |
4163 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
4164 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
4165 } | |
4166 // The rest of what's there better be a legal signature | |
4167 signature++; | |
4168 length--; | |
4169 void_ok = false; | |
4170 break; | |
4171 | |
4172 default: | |
4173 return NULL; | |
4174 } | |
4175 } | |
4176 return NULL; | |
4177 } |