Mercurial > hg > graal-compiler
annotate src/share/vm/classfile/classFileParser.cpp @ 1608:2389669474a6
Merge
author | jrose |
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date | Tue, 15 Jun 2010 15:57:36 -0700 |
parents | 3a9de63b2209 136b78722a08 |
children | 083fde3b838e |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_classFileParser.cpp.incl" | |
27 | |
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28 // We generally try to create the oops directly when parsing, rather than |
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29 // allocating temporary data structures and copying the bytes twice. A |
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30 // temporary area is only needed when parsing utf8 entries in the constant |
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31 // pool and when parsing line number tables. |
0 | 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 | |
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50 // Used for backward compatibility reasons: |
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51 // - to check NameAndType_info signatures more aggressively |
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52 #define JAVA_7_VERSION 51 |
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53 |
0 | 54 |
55 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
56 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
57 // this function (_current can be allocated in a register, with scalar | |
58 // replacement of aggregates). The _current pointer is copied back to | |
59 // stream() when this function returns. DON'T call another method within | |
60 // this method that uses stream(). | |
61 ClassFileStream* cfs0 = stream(); | |
62 ClassFileStream cfs1 = *cfs0; | |
63 ClassFileStream* cfs = &cfs1; | |
64 #ifdef ASSERT | |
65 u1* old_current = cfs0->current(); | |
66 #endif | |
67 | |
68 // Used for batching symbol allocations. | |
69 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
70 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
71 int indices[SymbolTable::symbol_alloc_batch_size]; | |
72 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
73 int names_count = 0; | |
74 | |
75 // parsing Index 0 is unused | |
76 for (int index = 1; index < length; index++) { | |
77 // Each of the following case guarantees one more byte in the stream | |
78 // for the following tag or the access_flags following constant pool, | |
79 // so we don't need bounds-check for reading tag. | |
80 u1 tag = cfs->get_u1_fast(); | |
81 switch (tag) { | |
82 case JVM_CONSTANT_Class : | |
83 { | |
84 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
85 u2 name_index = cfs->get_u2_fast(); | |
86 cp->klass_index_at_put(index, name_index); | |
87 } | |
88 break; | |
89 case JVM_CONSTANT_Fieldref : | |
90 { | |
91 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
92 u2 class_index = cfs->get_u2_fast(); | |
93 u2 name_and_type_index = cfs->get_u2_fast(); | |
94 cp->field_at_put(index, class_index, name_and_type_index); | |
95 } | |
96 break; | |
97 case JVM_CONSTANT_Methodref : | |
98 { | |
99 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
100 u2 class_index = cfs->get_u2_fast(); | |
101 u2 name_and_type_index = cfs->get_u2_fast(); | |
102 cp->method_at_put(index, class_index, name_and_type_index); | |
103 } | |
104 break; | |
105 case JVM_CONSTANT_InterfaceMethodref : | |
106 { | |
107 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
108 u2 class_index = cfs->get_u2_fast(); | |
109 u2 name_and_type_index = cfs->get_u2_fast(); | |
110 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
111 } | |
112 break; | |
113 case JVM_CONSTANT_String : | |
114 { | |
115 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
116 u2 string_index = cfs->get_u2_fast(); | |
117 cp->string_index_at_put(index, string_index); | |
118 } | |
119 break; | |
1602 | 120 case JVM_CONSTANT_MethodHandle : |
121 case JVM_CONSTANT_MethodType : | |
122 if (!EnableMethodHandles || | |
123 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
124 classfile_parse_error( | |
125 (!EnableInvokeDynamic ? | |
126 "This JVM does not support constant tag %u in class file %s" : | |
127 "Class file version does not support constant tag %u in class file %s"), | |
128 tag, CHECK); | |
129 } | |
130 if (tag == JVM_CONSTANT_MethodHandle) { | |
131 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags | |
132 u1 ref_kind = cfs->get_u1_fast(); | |
133 u2 method_index = cfs->get_u2_fast(); | |
134 cp->method_handle_index_at_put(index, ref_kind, method_index); | |
135 } else if (tag == JVM_CONSTANT_MethodType) { | |
136 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags | |
137 u2 signature_index = cfs->get_u2_fast(); | |
138 cp->method_type_index_at_put(index, signature_index); | |
139 } else { | |
140 ShouldNotReachHere(); | |
141 } | |
142 break; | |
0 | 143 case JVM_CONSTANT_Integer : |
144 { | |
145 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
146 u4 bytes = cfs->get_u4_fast(); | |
147 cp->int_at_put(index, (jint) bytes); | |
148 } | |
149 break; | |
150 case JVM_CONSTANT_Float : | |
151 { | |
152 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
153 u4 bytes = cfs->get_u4_fast(); | |
154 cp->float_at_put(index, *(jfloat*)&bytes); | |
155 } | |
156 break; | |
157 case JVM_CONSTANT_Long : | |
158 // A mangled type might cause you to overrun allocated memory | |
159 guarantee_property(index+1 < length, | |
160 "Invalid constant pool entry %u in class file %s", | |
161 index, CHECK); | |
162 { | |
163 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
164 u8 bytes = cfs->get_u8_fast(); | |
165 cp->long_at_put(index, bytes); | |
166 } | |
167 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
168 break; | |
169 case JVM_CONSTANT_Double : | |
170 // A mangled type might cause you to overrun allocated memory | |
171 guarantee_property(index+1 < length, | |
172 "Invalid constant pool entry %u in class file %s", | |
173 index, CHECK); | |
174 { | |
175 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
176 u8 bytes = cfs->get_u8_fast(); | |
177 cp->double_at_put(index, *(jdouble*)&bytes); | |
178 } | |
179 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
180 break; | |
181 case JVM_CONSTANT_NameAndType : | |
182 { | |
183 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
184 u2 name_index = cfs->get_u2_fast(); | |
185 u2 signature_index = cfs->get_u2_fast(); | |
186 cp->name_and_type_at_put(index, name_index, signature_index); | |
187 } | |
188 break; | |
189 case JVM_CONSTANT_Utf8 : | |
190 { | |
191 cfs->guarantee_more(2, CHECK); // utf8_length | |
192 u2 utf8_length = cfs->get_u2_fast(); | |
193 u1* utf8_buffer = cfs->get_u1_buffer(); | |
194 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
195 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
196 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
197 cfs->skip_u1_fast(utf8_length); | |
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198 |
0 | 199 // Before storing the symbol, make sure it's legal |
200 if (_need_verify) { | |
201 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
202 } | |
203 | |
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204 if (AnonymousClasses && has_cp_patch_at(index)) { |
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205 Handle patch = clear_cp_patch_at(index); |
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206 guarantee_property(java_lang_String::is_instance(patch()), |
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207 "Illegal utf8 patch at %d in class file %s", |
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208 index, CHECK); |
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209 char* str = java_lang_String::as_utf8_string(patch()); |
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210 // (could use java_lang_String::as_symbol instead, but might as well batch them) |
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211 utf8_buffer = (u1*) str; |
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212 utf8_length = (int) strlen(str); |
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213 } |
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214 |
0 | 215 unsigned int hash; |
216 symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); | |
217 if (result == NULL) { | |
218 names[names_count] = (char*)utf8_buffer; | |
219 lengths[names_count] = utf8_length; | |
220 indices[names_count] = index; | |
221 hashValues[names_count++] = hash; | |
222 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
223 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
224 names_count = 0; | |
225 } | |
226 } else { | |
227 cp->symbol_at_put(index, result); | |
228 } | |
229 } | |
230 break; | |
231 default: | |
232 classfile_parse_error( | |
233 "Unknown constant tag %u in class file %s", tag, CHECK); | |
234 break; | |
235 } | |
236 } | |
237 | |
238 // Allocate the remaining symbols | |
239 if (names_count > 0) { | |
240 oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); | |
241 } | |
242 | |
243 // Copy _current pointer of local copy back to stream(). | |
244 #ifdef ASSERT | |
245 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
246 #endif | |
247 cfs0->set_current(cfs1.current()); | |
248 } | |
249 | |
250 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } | |
251 | |
252 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
253 ClassFileStream* cfs = stream(); | |
254 constantPoolHandle nullHandle; | |
255 | |
256 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
257 u2 length = cfs->get_u2_fast(); | |
258 guarantee_property( | |
259 length >= 1, "Illegal constant pool size %u in class file %s", | |
260 length, CHECK_(nullHandle)); | |
261 constantPoolOop constant_pool = | |
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262 oopFactory::new_constantPool(length, |
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263 methodOopDesc::IsSafeConc, |
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264 CHECK_(nullHandle)); |
0 | 265 constantPoolHandle cp (THREAD, constant_pool); |
266 | |
267 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
268 | |
269 // parsing constant pool entries | |
270 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
271 | |
272 int index = 1; // declared outside of loops for portability | |
273 | |
274 // first verification pass - validate cross references and fixup class and string constants | |
275 for (index = 1; index < length; index++) { // Index 0 is unused | |
276 switch (cp->tag_at(index).value()) { | |
277 case JVM_CONSTANT_Class : | |
278 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
279 break; | |
280 case JVM_CONSTANT_Fieldref : | |
281 // fall through | |
282 case JVM_CONSTANT_Methodref : | |
283 // fall through | |
284 case JVM_CONSTANT_InterfaceMethodref : { | |
285 if (!_need_verify) break; | |
286 int klass_ref_index = cp->klass_ref_index_at(index); | |
287 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
288 check_property(valid_cp_range(klass_ref_index, length) && | |
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289 is_klass_reference(cp, klass_ref_index), |
0 | 290 "Invalid constant pool index %u in class file %s", |
291 klass_ref_index, | |
292 CHECK_(nullHandle)); | |
293 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
294 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
295 "Invalid constant pool index %u in class file %s", | |
296 name_and_type_ref_index, | |
297 CHECK_(nullHandle)); | |
298 break; | |
299 } | |
300 case JVM_CONSTANT_String : | |
301 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
302 break; | |
303 case JVM_CONSTANT_Integer : | |
304 break; | |
305 case JVM_CONSTANT_Float : | |
306 break; | |
307 case JVM_CONSTANT_Long : | |
308 case JVM_CONSTANT_Double : | |
309 index++; | |
310 check_property( | |
311 (index < length && cp->tag_at(index).is_invalid()), | |
312 "Improper constant pool long/double index %u in class file %s", | |
313 index, CHECK_(nullHandle)); | |
314 break; | |
315 case JVM_CONSTANT_NameAndType : { | |
316 if (!_need_verify) break; | |
317 int name_ref_index = cp->name_ref_index_at(index); | |
318 int signature_ref_index = cp->signature_ref_index_at(index); | |
319 check_property( | |
320 valid_cp_range(name_ref_index, length) && | |
321 cp->tag_at(name_ref_index).is_utf8(), | |
322 "Invalid constant pool index %u in class file %s", | |
323 name_ref_index, CHECK_(nullHandle)); | |
324 check_property( | |
325 valid_cp_range(signature_ref_index, length) && | |
326 cp->tag_at(signature_ref_index).is_utf8(), | |
327 "Invalid constant pool index %u in class file %s", | |
328 signature_ref_index, CHECK_(nullHandle)); | |
329 break; | |
330 } | |
331 case JVM_CONSTANT_Utf8 : | |
332 break; | |
333 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
334 case JVM_CONSTANT_UnresolvedClassInError: | |
335 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
336 break; | |
337 case JVM_CONSTANT_ClassIndex : | |
338 { | |
339 int class_index = cp->klass_index_at(index); | |
340 check_property( | |
341 valid_cp_range(class_index, length) && | |
342 cp->tag_at(class_index).is_utf8(), | |
343 "Invalid constant pool index %u in class file %s", | |
344 class_index, CHECK_(nullHandle)); | |
345 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
346 } | |
347 break; | |
348 case JVM_CONSTANT_UnresolvedString : | |
349 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
350 break; | |
351 case JVM_CONSTANT_StringIndex : | |
352 { | |
353 int string_index = cp->string_index_at(index); | |
354 check_property( | |
355 valid_cp_range(string_index, length) && | |
356 cp->tag_at(string_index).is_utf8(), | |
357 "Invalid constant pool index %u in class file %s", | |
358 string_index, CHECK_(nullHandle)); | |
359 symbolOop sym = cp->symbol_at(string_index); | |
360 cp->unresolved_string_at_put(index, sym); | |
361 } | |
362 break; | |
1602 | 363 case JVM_CONSTANT_MethodHandle : |
364 { | |
365 int ref_index = cp->method_handle_index_at(index); | |
366 check_property( | |
367 valid_cp_range(ref_index, length) && | |
368 EnableMethodHandles, | |
369 "Invalid constant pool index %u in class file %s", | |
370 ref_index, CHECK_(nullHandle)); | |
371 constantTag tag = cp->tag_at(ref_index); | |
372 int ref_kind = cp->method_handle_ref_kind_at(index); | |
373 switch (ref_kind) { | |
374 case JVM_REF_getField: | |
375 case JVM_REF_getStatic: | |
376 case JVM_REF_putField: | |
377 case JVM_REF_putStatic: | |
378 check_property( | |
379 tag.is_field(), | |
380 "Invalid constant pool index %u in class file %s (not a field)", | |
381 ref_index, CHECK_(nullHandle)); | |
382 break; | |
383 case JVM_REF_invokeVirtual: | |
384 case JVM_REF_invokeStatic: | |
385 case JVM_REF_invokeSpecial: | |
386 case JVM_REF_newInvokeSpecial: | |
387 check_property( | |
388 tag.is_method(), | |
389 "Invalid constant pool index %u in class file %s (not a method)", | |
390 ref_index, CHECK_(nullHandle)); | |
391 break; | |
392 case JVM_REF_invokeInterface: | |
393 check_property( | |
394 tag.is_interface_method(), | |
395 "Invalid constant pool index %u in class file %s (not an interface method)", | |
396 ref_index, CHECK_(nullHandle)); | |
397 break; | |
398 default: | |
399 classfile_parse_error( | |
400 "Bad method handle kind at constant pool index %u in class file %s", | |
401 index, CHECK_(nullHandle)); | |
402 } | |
403 // Keep the ref_index unchanged. It will be indirected at link-time. | |
404 } | |
405 break; | |
406 case JVM_CONSTANT_MethodType : | |
407 { | |
408 int ref_index = cp->method_type_index_at(index); | |
409 check_property( | |
410 valid_cp_range(ref_index, length) && | |
411 cp->tag_at(ref_index).is_utf8() && | |
412 EnableMethodHandles, | |
413 "Invalid constant pool index %u in class file %s", | |
414 ref_index, CHECK_(nullHandle)); | |
415 } | |
416 break; | |
0 | 417 default: |
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418 fatal(err_msg("bad constant pool tag value %u", |
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419 cp->tag_at(index).value())); |
0 | 420 ShouldNotReachHere(); |
421 break; | |
422 } // end of switch | |
423 } // end of for | |
424 | |
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425 if (_cp_patches != NULL) { |
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426 // need to treat this_class specially... |
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427 assert(AnonymousClasses, ""); |
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428 int this_class_index; |
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429 { |
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430 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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431 u1* mark = cfs->current(); |
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432 u2 flags = cfs->get_u2_fast(); |
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433 this_class_index = cfs->get_u2_fast(); |
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434 cfs->set_current(mark); // revert to mark |
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435 } |
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436 |
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437 for (index = 1; index < length; index++) { // Index 0 is unused |
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438 if (has_cp_patch_at(index)) { |
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439 guarantee_property(index != this_class_index, |
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440 "Illegal constant pool patch to self at %d in class file %s", |
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441 index, CHECK_(nullHandle)); |
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442 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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443 } |
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444 } |
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445 // Ensure that all the patches have been used. |
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446 for (index = 0; index < _cp_patches->length(); index++) { |
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447 guarantee_property(!has_cp_patch_at(index), |
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448 "Unused constant pool patch at %d in class file %s", |
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449 index, CHECK_(nullHandle)); |
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450 } |
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451 } |
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452 |
0 | 453 if (!_need_verify) { |
454 return cp; | |
455 } | |
456 | |
457 // second verification pass - checks the strings are of the right format. | |
431
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458 // but not yet to the other entries |
0 | 459 for (index = 1; index < length; index++) { |
460 jbyte tag = cp->tag_at(index).value(); | |
461 switch (tag) { | |
462 case JVM_CONSTANT_UnresolvedClass: { | |
463 symbolHandle class_name(THREAD, cp->unresolved_klass_at(index)); | |
431
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464 // check the name, even if _cp_patches will overwrite it |
0 | 465 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
466 break; | |
467 } | |
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468 case JVM_CONSTANT_NameAndType: { |
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469 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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470 int sig_index = cp->signature_ref_index_at(index); |
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471 int name_index = cp->name_ref_index_at(index); |
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472 symbolHandle name(THREAD, cp->symbol_at(name_index)); |
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473 symbolHandle sig(THREAD, cp->symbol_at(sig_index)); |
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474 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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475 verify_legal_method_signature(name, sig, CHECK_(nullHandle)); |
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476 } else { |
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477 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); |
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478 } |
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479 } |
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480 break; |
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481 } |
0 | 482 case JVM_CONSTANT_Fieldref: |
483 case JVM_CONSTANT_Methodref: | |
484 case JVM_CONSTANT_InterfaceMethodref: { | |
485 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
486 // already verified to be utf8 | |
487 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
488 // already verified to be utf8 | |
489 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
490 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
491 symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index)); | |
492 if (tag == JVM_CONSTANT_Fieldref) { | |
493 verify_legal_field_name(name, CHECK_(nullHandle)); | |
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494 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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495 // Signature is verified above, when iterating NameAndType_info. |
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496 // Need only to be sure it's the right type. |
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497 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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498 throwIllegalSignature( |
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499 "Field", name, signature, CHECK_(nullHandle)); |
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500 } |
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501 } else { |
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502 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); |
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503 } |
0 | 504 } else { |
505 verify_legal_method_name(name, CHECK_(nullHandle)); | |
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506 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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507 // Signature is verified above, when iterating NameAndType_info. |
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508 // Need only to be sure it's the right type. |
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509 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) { |
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510 throwIllegalSignature( |
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511 "Method", name, signature, CHECK_(nullHandle)); |
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512 } |
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513 } else { |
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514 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); |
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515 } |
0 | 516 if (tag == JVM_CONSTANT_Methodref) { |
517 // 4509014: If a class method name begins with '<', it must be "<init>". | |
518 assert(!name.is_null(), "method name in constant pool is null"); | |
519 unsigned int name_len = name->utf8_length(); | |
520 assert(name_len > 0, "bad method name"); // already verified as legal name | |
521 if (name->byte_at(0) == '<') { | |
522 if (name() != vmSymbols::object_initializer_name()) { | |
523 classfile_parse_error( | |
524 "Bad method name at constant pool index %u in class file %s", | |
525 name_ref_index, CHECK_(nullHandle)); | |
526 } | |
527 } | |
528 } | |
529 } | |
530 break; | |
531 } | |
1602 | 532 case JVM_CONSTANT_MethodHandle: { |
533 int ref_index = cp->method_handle_index_at(index); | |
534 int ref_kind = cp->method_handle_ref_kind_at(index); | |
535 switch (ref_kind) { | |
536 case JVM_REF_invokeVirtual: | |
537 case JVM_REF_invokeStatic: | |
538 case JVM_REF_invokeSpecial: | |
539 case JVM_REF_newInvokeSpecial: | |
540 { | |
541 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index); | |
542 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
543 symbolHandle name(THREAD, cp->symbol_at(name_ref_index)); | |
544 if (ref_kind == JVM_REF_newInvokeSpecial) { | |
545 if (name() != vmSymbols::object_initializer_name()) { | |
546 classfile_parse_error( | |
547 "Bad constructor name at constant pool index %u in class file %s", | |
548 name_ref_index, CHECK_(nullHandle)); | |
549 } | |
550 } else { | |
551 if (name() == vmSymbols::object_initializer_name()) { | |
552 classfile_parse_error( | |
553 "Bad method name at constant pool index %u in class file %s", | |
554 name_ref_index, CHECK_(nullHandle)); | |
555 } | |
556 } | |
557 } | |
558 break; | |
559 // Other ref_kinds are already fully checked in previous pass. | |
560 } | |
561 break; | |
562 } | |
563 case JVM_CONSTANT_MethodType: { | |
564 symbolHandle no_name = vmSymbolHandles::type_name(); // place holder | |
565 symbolHandle signature(THREAD, cp->method_type_signature_at(index)); | |
566 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle)); | |
567 break; | |
568 } | |
0 | 569 } // end of switch |
570 } // end of for | |
571 | |
572 return cp; | |
573 } | |
574 | |
575 | |
431
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576 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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577 assert(AnonymousClasses, ""); |
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578 BasicType patch_type = T_VOID; |
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579 switch (cp->tag_at(index).value()) { |
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580 |
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581 case JVM_CONSTANT_UnresolvedClass : |
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582 // Patching a class means pre-resolving it. |
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583 // The name in the constant pool is ignored. |
1602 | 584 if (java_lang_Class::is_instance(patch())) { |
431
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585 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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586 "Illegal class patch at %d in class file %s", |
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587 index, CHECK); |
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588 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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589 } else { |
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590 guarantee_property(java_lang_String::is_instance(patch()), |
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591 "Illegal class patch at %d in class file %s", |
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592 index, CHECK); |
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593 symbolHandle name = java_lang_String::as_symbol(patch(), CHECK); |
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594 cp->unresolved_klass_at_put(index, name()); |
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595 } |
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596 break; |
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597 |
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598 case JVM_CONSTANT_UnresolvedString : |
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599 // Patching a string means pre-resolving it. |
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600 // The spelling in the constant pool is ignored. |
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601 // The constant reference may be any object whatever. |
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602 // If it is not a real interned string, the constant is referred |
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603 // to as a "pseudo-string", and must be presented to the CP |
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604 // explicitly, because it may require scavenging. |
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605 cp->pseudo_string_at_put(index, patch()); |
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606 break; |
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607 |
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608 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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609 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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610 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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611 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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612 patch_prim: |
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613 { |
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614 jvalue value; |
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615 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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616 guarantee_property(value_type == patch_type, |
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617 "Illegal primitive patch at %d in class file %s", |
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618 index, CHECK); |
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619 switch (value_type) { |
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620 case T_INT: cp->int_at_put(index, value.i); break; |
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621 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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622 case T_LONG: cp->long_at_put(index, value.j); break; |
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623 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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624 default: assert(false, ""); |
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625 } |
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626 } |
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627 break; |
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628 |
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629 default: |
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630 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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631 guarantee_property(!has_cp_patch_at(index), |
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632 "Illegal unexpected patch at %d in class file %s", |
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633 index, CHECK); |
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634 return; |
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635 } |
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636 |
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637 // On fall-through, mark the patch as used. |
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638 clear_cp_patch_at(index); |
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639 } |
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640 |
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641 |
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642 |
0 | 643 class NameSigHash: public ResourceObj { |
644 public: | |
645 symbolOop _name; // name | |
646 symbolOop _sig; // signature | |
647 NameSigHash* _next; // Next entry in hash table | |
648 }; | |
649 | |
650 | |
651 #define HASH_ROW_SIZE 256 | |
652 | |
653 unsigned int hash(symbolOop name, symbolOop sig) { | |
654 unsigned int raw_hash = 0; | |
655 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
656 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
657 | |
658 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
659 } | |
660 | |
661 | |
662 void initialize_hashtable(NameSigHash** table) { | |
663 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
664 } | |
665 | |
666 // Return false if the name/sig combination is found in table. | |
667 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
668 // The old format checker uses heap sort to find duplicates. | |
669 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
670 // of table since we don't expect symbolOop's to move. | |
671 bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) { | |
672 assert(name != NULL, "name in constant pool is NULL"); | |
673 | |
674 // First lookup for duplicates | |
675 int index = hash(name, sig); | |
676 NameSigHash* entry = table[index]; | |
677 while (entry != NULL) { | |
678 if (entry->_name == name && entry->_sig == sig) { | |
679 return false; | |
680 } | |
681 entry = entry->_next; | |
682 } | |
683 | |
684 // No duplicate is found, allocate a new entry and fill it. | |
685 entry = new NameSigHash(); | |
686 entry->_name = name; | |
687 entry->_sig = sig; | |
688 | |
689 // Insert into hash table | |
690 entry->_next = table[index]; | |
691 table[index] = entry; | |
692 | |
693 return true; | |
694 } | |
695 | |
696 | |
697 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
698 int length, | |
699 Handle class_loader, | |
700 Handle protection_domain, | |
701 symbolHandle class_name, | |
702 TRAPS) { | |
703 ClassFileStream* cfs = stream(); | |
704 assert(length > 0, "only called for length>0"); | |
705 objArrayHandle nullHandle; | |
706 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
707 objArrayHandle interfaces (THREAD, interface_oop); | |
708 | |
709 int index; | |
710 for (index = 0; index < length; index++) { | |
711 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
431
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712 KlassHandle interf; |
0 | 713 check_property( |
714 valid_cp_range(interface_index, cp->length()) && | |
431
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715 is_klass_reference(cp, interface_index), |
0 | 716 "Interface name has bad constant pool index %u in class file %s", |
717 interface_index, CHECK_(nullHandle)); | |
431
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718 if (cp->tag_at(interface_index).is_klass()) { |
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719 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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720 } else { |
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721 symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index)); |
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722 |
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723 // Don't need to check legal name because it's checked when parsing constant pool. |
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724 // But need to make sure it's not an array type. |
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725 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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726 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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727 |
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728 // Call resolve_super so classcircularity is checked |
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729 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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730 unresolved_klass, class_loader, protection_domain, |
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731 false, CHECK_(nullHandle)); |
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732 interf = KlassHandle(THREAD, k); |
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733 |
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734 if (LinkWellKnownClasses) // my super type is well known to me |
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735 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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736 } |
0 | 737 |
738 if (!Klass::cast(interf())->is_interface()) { | |
739 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
740 } | |
741 interfaces->obj_at_put(index, interf()); | |
742 } | |
743 | |
744 if (!_need_verify || length <= 1) { | |
745 return interfaces; | |
746 } | |
747 | |
748 // Check if there's any duplicates in interfaces | |
749 ResourceMark rm(THREAD); | |
750 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
751 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
752 initialize_hashtable(interface_names); | |
753 bool dup = false; | |
754 { | |
755 debug_only(No_Safepoint_Verifier nsv;) | |
756 for (index = 0; index < length; index++) { | |
757 klassOop k = (klassOop)interfaces->obj_at(index); | |
758 symbolOop name = instanceKlass::cast(k)->name(); | |
759 // If no duplicates, add (name, NULL) in hashtable interface_names. | |
760 if (!put_after_lookup(name, NULL, interface_names)) { | |
761 dup = true; | |
762 break; | |
763 } | |
764 } | |
765 } | |
766 if (dup) { | |
767 classfile_parse_error("Duplicate interface name in class file %s", | |
768 CHECK_(nullHandle)); | |
769 } | |
770 | |
771 return interfaces; | |
772 } | |
773 | |
774 | |
775 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
776 // Make sure the constant pool entry is of a type appropriate to this field | |
777 guarantee_property( | |
778 (constantvalue_index > 0 && | |
779 constantvalue_index < cp->length()), | |
780 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
781 constantvalue_index, CHECK); | |
782 constantTag value_type = cp->tag_at(constantvalue_index); | |
783 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
784 case T_LONG: | |
785 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
786 break; | |
787 case T_FLOAT: | |
788 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
789 break; | |
790 case T_DOUBLE: | |
791 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
792 break; | |
793 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
794 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
795 break; | |
796 case T_OBJECT: | |
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797 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") |
0 | 798 && (value_type.is_string() || value_type.is_unresolved_string())), |
799 "Bad string initial value in class file %s", CHECK); | |
800 break; | |
801 default: | |
802 classfile_parse_error( | |
803 "Unable to set initial value %u in class file %s", | |
804 constantvalue_index, CHECK); | |
805 } | |
806 } | |
807 | |
808 | |
809 // Parse attributes for a field. | |
810 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
811 u2 attributes_count, | |
812 bool is_static, u2 signature_index, | |
813 u2* constantvalue_index_addr, | |
814 bool* is_synthetic_addr, | |
815 u2* generic_signature_index_addr, | |
816 typeArrayHandle* field_annotations, | |
817 TRAPS) { | |
818 ClassFileStream* cfs = stream(); | |
819 assert(attributes_count > 0, "length should be greater than 0"); | |
820 u2 constantvalue_index = 0; | |
821 u2 generic_signature_index = 0; | |
822 bool is_synthetic = false; | |
823 u1* runtime_visible_annotations = NULL; | |
824 int runtime_visible_annotations_length = 0; | |
825 u1* runtime_invisible_annotations = NULL; | |
826 int runtime_invisible_annotations_length = 0; | |
827 while (attributes_count--) { | |
828 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
829 u2 attribute_name_index = cfs->get_u2_fast(); | |
830 u4 attribute_length = cfs->get_u4_fast(); | |
831 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
832 cp->tag_at(attribute_name_index).is_utf8(), | |
833 "Invalid field attribute index %u in class file %s", | |
834 attribute_name_index, | |
835 CHECK); | |
836 symbolOop attribute_name = cp->symbol_at(attribute_name_index); | |
837 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { | |
838 // ignore if non-static | |
839 if (constantvalue_index != 0) { | |
840 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
841 } | |
842 check_property( | |
843 attribute_length == 2, | |
844 "Invalid ConstantValue field attribute length %u in class file %s", | |
845 attribute_length, CHECK); | |
846 constantvalue_index = cfs->get_u2(CHECK); | |
847 if (_need_verify) { | |
848 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
849 } | |
850 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
851 if (attribute_length != 0) { | |
852 classfile_parse_error( | |
853 "Invalid Synthetic field attribute length %u in class file %s", | |
854 attribute_length, CHECK); | |
855 } | |
856 is_synthetic = true; | |
857 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
858 if (attribute_length != 0) { | |
859 classfile_parse_error( | |
860 "Invalid Deprecated field attribute length %u in class file %s", | |
861 attribute_length, CHECK); | |
862 } | |
863 } else if (_major_version >= JAVA_1_5_VERSION) { | |
864 if (attribute_name == vmSymbols::tag_signature()) { | |
865 if (attribute_length != 2) { | |
866 classfile_parse_error( | |
867 "Wrong size %u for field's Signature attribute in class file %s", | |
868 attribute_length, CHECK); | |
869 } | |
870 generic_signature_index = cfs->get_u2(CHECK); | |
871 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
872 runtime_visible_annotations_length = attribute_length; | |
873 runtime_visible_annotations = cfs->get_u1_buffer(); | |
874 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
875 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
876 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
877 runtime_invisible_annotations_length = attribute_length; | |
878 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
879 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
880 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
881 } else { | |
882 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
883 } | |
884 } else { | |
885 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
886 } | |
887 } | |
888 | |
889 *constantvalue_index_addr = constantvalue_index; | |
890 *is_synthetic_addr = is_synthetic; | |
891 *generic_signature_index_addr = generic_signature_index; | |
892 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
893 runtime_visible_annotations_length, | |
894 runtime_invisible_annotations, | |
895 runtime_invisible_annotations_length, | |
896 CHECK); | |
897 return; | |
898 } | |
899 | |
900 | |
901 // Field allocation types. Used for computing field offsets. | |
902 | |
903 enum FieldAllocationType { | |
904 STATIC_OOP, // Oops | |
905 STATIC_BYTE, // Boolean, Byte, char | |
906 STATIC_SHORT, // shorts | |
907 STATIC_WORD, // ints | |
908 STATIC_DOUBLE, // long or double | |
909 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
910 NONSTATIC_OOP, | |
911 NONSTATIC_BYTE, | |
912 NONSTATIC_SHORT, | |
913 NONSTATIC_WORD, | |
914 NONSTATIC_DOUBLE, | |
915 NONSTATIC_ALIGNED_DOUBLE | |
916 }; | |
917 | |
918 | |
919 struct FieldAllocationCount { | |
939
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920 unsigned int static_oop_count; |
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921 unsigned int static_byte_count; |
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922 unsigned int static_short_count; |
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923 unsigned int static_word_count; |
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924 unsigned int static_double_count; |
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925 unsigned int nonstatic_oop_count; |
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926 unsigned int nonstatic_byte_count; |
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927 unsigned int nonstatic_short_count; |
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928 unsigned int nonstatic_word_count; |
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929 unsigned int nonstatic_double_count; |
0 | 930 }; |
931 | |
932 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
933 struct FieldAllocationCount *fac, | |
934 objArrayHandle* fields_annotations, TRAPS) { | |
935 ClassFileStream* cfs = stream(); | |
936 typeArrayHandle nullHandle; | |
937 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
938 u2 length = cfs->get_u2_fast(); | |
939 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
940 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
941 typeArrayHandle fields(THREAD, new_fields); | |
942 | |
943 int index = 0; | |
944 typeArrayHandle field_annotations; | |
945 for (int n = 0; n < length; n++) { | |
946 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
947 | |
948 AccessFlags access_flags; | |
949 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
950 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
951 access_flags.set_flags(flags); | |
952 | |
953 u2 name_index = cfs->get_u2_fast(); | |
954 int cp_size = cp->length(); | |
955 check_property( | |
956 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
957 "Invalid constant pool index %u for field name in class file %s", | |
958 name_index, CHECK_(nullHandle)); | |
959 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
960 verify_legal_field_name(name, CHECK_(nullHandle)); | |
961 | |
962 u2 signature_index = cfs->get_u2_fast(); | |
963 check_property( | |
964 valid_cp_range(signature_index, cp_size) && | |
965 cp->tag_at(signature_index).is_utf8(), | |
966 "Invalid constant pool index %u for field signature in class file %s", | |
967 signature_index, CHECK_(nullHandle)); | |
968 symbolHandle sig(THREAD, cp->symbol_at(signature_index)); | |
969 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); | |
970 | |
971 u2 constantvalue_index = 0; | |
972 bool is_synthetic = false; | |
973 u2 generic_signature_index = 0; | |
974 bool is_static = access_flags.is_static(); | |
975 | |
976 u2 attributes_count = cfs->get_u2_fast(); | |
977 if (attributes_count > 0) { | |
978 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
979 &constantvalue_index, &is_synthetic, | |
980 &generic_signature_index, &field_annotations, | |
981 CHECK_(nullHandle)); | |
982 if (field_annotations.not_null()) { | |
983 if (fields_annotations->is_null()) { | |
984 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
985 *fields_annotations = objArrayHandle(THREAD, md); | |
986 } | |
987 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
988 } | |
989 if (is_synthetic) { | |
990 access_flags.set_is_synthetic(); | |
991 } | |
992 } | |
993 | |
994 fields->short_at_put(index++, access_flags.as_short()); | |
995 fields->short_at_put(index++, name_index); | |
996 fields->short_at_put(index++, signature_index); | |
997 fields->short_at_put(index++, constantvalue_index); | |
998 | |
999 // Remember how many oops we encountered and compute allocation type | |
1000 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
1001 FieldAllocationType atype; | |
1002 if ( is_static ) { | |
1003 switch ( type ) { | |
1004 case T_BOOLEAN: | |
1005 case T_BYTE: | |
1006 fac->static_byte_count++; | |
1007 atype = STATIC_BYTE; | |
1008 break; | |
1009 case T_LONG: | |
1010 case T_DOUBLE: | |
1011 if (Universe::field_type_should_be_aligned(type)) { | |
1012 atype = STATIC_ALIGNED_DOUBLE; | |
1013 } else { | |
1014 atype = STATIC_DOUBLE; | |
1015 } | |
1016 fac->static_double_count++; | |
1017 break; | |
1018 case T_CHAR: | |
1019 case T_SHORT: | |
1020 fac->static_short_count++; | |
1021 atype = STATIC_SHORT; | |
1022 break; | |
1023 case T_FLOAT: | |
1024 case T_INT: | |
1025 fac->static_word_count++; | |
1026 atype = STATIC_WORD; | |
1027 break; | |
1028 case T_ARRAY: | |
1029 case T_OBJECT: | |
1030 fac->static_oop_count++; | |
1031 atype = STATIC_OOP; | |
1032 break; | |
1033 case T_ADDRESS: | |
1034 case T_VOID: | |
1035 default: | |
1036 assert(0, "bad field type"); | |
1037 } | |
1038 } else { | |
1039 switch ( type ) { | |
1040 case T_BOOLEAN: | |
1041 case T_BYTE: | |
1042 fac->nonstatic_byte_count++; | |
1043 atype = NONSTATIC_BYTE; | |
1044 break; | |
1045 case T_LONG: | |
1046 case T_DOUBLE: | |
1047 if (Universe::field_type_should_be_aligned(type)) { | |
1048 atype = NONSTATIC_ALIGNED_DOUBLE; | |
1049 } else { | |
1050 atype = NONSTATIC_DOUBLE; | |
1051 } | |
1052 fac->nonstatic_double_count++; | |
1053 break; | |
1054 case T_CHAR: | |
1055 case T_SHORT: | |
1056 fac->nonstatic_short_count++; | |
1057 atype = NONSTATIC_SHORT; | |
1058 break; | |
1059 case T_FLOAT: | |
1060 case T_INT: | |
1061 fac->nonstatic_word_count++; | |
1062 atype = NONSTATIC_WORD; | |
1063 break; | |
1064 case T_ARRAY: | |
1065 case T_OBJECT: | |
1066 fac->nonstatic_oop_count++; | |
1067 atype = NONSTATIC_OOP; | |
1068 break; | |
1069 case T_ADDRESS: | |
1070 case T_VOID: | |
1071 default: | |
1072 assert(0, "bad field type"); | |
1073 } | |
1074 } | |
1075 | |
1076 // The correct offset is computed later (all oop fields will be located together) | |
1077 // We temporarily store the allocation type in the offset field | |
1078 fields->short_at_put(index++, atype); | |
1079 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
1080 fields->short_at_put(index++, generic_signature_index); | |
1081 } | |
1082 | |
1083 if (_need_verify && length > 1) { | |
1084 // Check duplicated fields | |
1085 ResourceMark rm(THREAD); | |
1086 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1087 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
1088 initialize_hashtable(names_and_sigs); | |
1089 bool dup = false; | |
1090 { | |
1091 debug_only(No_Safepoint_Verifier nsv;) | |
1092 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
1093 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
1094 symbolOop name = cp->symbol_at(name_index); | |
1095 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); | |
1096 symbolOop sig = cp->symbol_at(sig_index); | |
1097 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
1098 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
1099 dup = true; | |
1100 break; | |
1101 } | |
1102 } | |
1103 } | |
1104 if (dup) { | |
1105 classfile_parse_error("Duplicate field name&signature in class file %s", | |
1106 CHECK_(nullHandle)); | |
1107 } | |
1108 } | |
1109 | |
1110 return fields; | |
1111 } | |
1112 | |
1113 | |
1114 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
1115 while (length-- > 0) { | |
1116 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
1117 } | |
1118 } | |
1119 | |
1120 | |
1121 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
1122 u4 exception_table_length, | |
1123 constantPoolHandle cp, | |
1124 TRAPS) { | |
1125 ClassFileStream* cfs = stream(); | |
1126 typeArrayHandle nullHandle; | |
1127 | |
1128 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
1129 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
1130 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
1131 | |
1132 int index = 0; | |
1133 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
1134 for (unsigned int i = 0; i < exception_table_length; i++) { | |
1135 u2 start_pc = cfs->get_u2_fast(); | |
1136 u2 end_pc = cfs->get_u2_fast(); | |
1137 u2 handler_pc = cfs->get_u2_fast(); | |
1138 u2 catch_type_index = cfs->get_u2_fast(); | |
1139 // Will check legal target after parsing code array in verifier. | |
1140 if (_need_verify) { | |
1141 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
1142 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
1143 guarantee_property(handler_pc < code_length, | |
1144 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
1145 if (catch_type_index != 0) { | |
1146 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
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1147 is_klass_reference(cp, catch_type_index), |
0 | 1148 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
1149 } | |
1150 } | |
1151 exception_handlers->int_at_put(index++, start_pc); | |
1152 exception_handlers->int_at_put(index++, end_pc); | |
1153 exception_handlers->int_at_put(index++, handler_pc); | |
1154 exception_handlers->int_at_put(index++, catch_type_index); | |
1155 } | |
1156 return exception_handlers; | |
1157 } | |
1158 | |
1159 void ClassFileParser::parse_linenumber_table( | |
1160 u4 code_attribute_length, u4 code_length, | |
1161 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
1162 ClassFileStream* cfs = stream(); | |
1163 unsigned int num_entries = cfs->get_u2(CHECK); | |
1164 | |
1165 // Each entry is a u2 start_pc, and a u2 line_number | |
1166 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
1167 | |
1168 // Verify line number attribute and table length | |
1169 check_property( | |
1170 code_attribute_length == sizeof(u2) + length_in_bytes, | |
1171 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
1172 | |
1173 cfs->guarantee_more(length_in_bytes, CHECK); | |
1174 | |
1175 if ((*write_stream) == NULL) { | |
1176 if (length_in_bytes > fixed_buffer_size) { | |
1177 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
1178 } else { | |
1179 (*write_stream) = new CompressedLineNumberWriteStream( | |
1180 linenumbertable_buffer, fixed_buffer_size); | |
1181 } | |
1182 } | |
1183 | |
1184 while (num_entries-- > 0) { | |
1185 u2 bci = cfs->get_u2_fast(); // start_pc | |
1186 u2 line = cfs->get_u2_fast(); // line_number | |
1187 guarantee_property(bci < code_length, | |
1188 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
1189 (*write_stream)->write_pair(bci, line); | |
1190 } | |
1191 } | |
1192 | |
1193 | |
1194 // Class file LocalVariableTable elements. | |
1195 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
1196 public: | |
1197 u2 start_bci; | |
1198 u2 length; | |
1199 u2 name_cp_index; | |
1200 u2 descriptor_cp_index; | |
1201 u2 slot; | |
1202 }; | |
1203 | |
1204 | |
1205 class LVT_Hash: public CHeapObj { | |
1206 public: | |
1207 LocalVariableTableElement *_elem; // element | |
1208 LVT_Hash* _next; // Next entry in hash table | |
1209 }; | |
1210 | |
1211 unsigned int hash(LocalVariableTableElement *elem) { | |
1212 unsigned int raw_hash = elem->start_bci; | |
1213 | |
1214 raw_hash = elem->length + raw_hash * 37; | |
1215 raw_hash = elem->name_cp_index + raw_hash * 37; | |
1216 raw_hash = elem->slot + raw_hash * 37; | |
1217 | |
1218 return raw_hash % HASH_ROW_SIZE; | |
1219 } | |
1220 | |
1221 void initialize_hashtable(LVT_Hash** table) { | |
1222 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1223 table[i] = NULL; | |
1224 } | |
1225 } | |
1226 | |
1227 void clear_hashtable(LVT_Hash** table) { | |
1228 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
1229 LVT_Hash* current = table[i]; | |
1230 LVT_Hash* next; | |
1231 while (current != NULL) { | |
1232 next = current->_next; | |
1233 current->_next = NULL; | |
1234 delete(current); | |
1235 current = next; | |
1236 } | |
1237 table[i] = NULL; | |
1238 } | |
1239 } | |
1240 | |
1241 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
1242 LVT_Hash* entry = table[index]; | |
1243 | |
1244 /* | |
1245 * 3-tuple start_bci/length/slot has to be unique key, | |
1246 * so the following comparison seems to be redundant: | |
1247 * && elem->name_cp_index == entry->_elem->name_cp_index | |
1248 */ | |
1249 while (entry != NULL) { | |
1250 if (elem->start_bci == entry->_elem->start_bci | |
1251 && elem->length == entry->_elem->length | |
1252 && elem->name_cp_index == entry->_elem->name_cp_index | |
1253 && elem->slot == entry->_elem->slot | |
1254 ) { | |
1255 return entry; | |
1256 } | |
1257 entry = entry->_next; | |
1258 } | |
1259 return NULL; | |
1260 } | |
1261 | |
1262 // Return false if the local variable is found in table. | |
1263 // Return true if no duplicate is found. | |
1264 // And local variable is added as a new entry in table. | |
1265 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
1266 // First lookup for duplicates | |
1267 int index = hash(elem); | |
1268 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
1269 | |
1270 if (entry != NULL) { | |
1271 return false; | |
1272 } | |
1273 // No duplicate is found, allocate a new entry and fill it. | |
1274 if ((entry = new LVT_Hash()) == NULL) { | |
1275 return false; | |
1276 } | |
1277 entry->_elem = elem; | |
1278 | |
1279 // Insert into hash table | |
1280 entry->_next = table[index]; | |
1281 table[index] = entry; | |
1282 | |
1283 return true; | |
1284 } | |
1285 | |
1286 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
1287 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
1288 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
1289 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
1290 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
1291 lvt->signature_cp_index = 0; | |
1292 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
1293 } | |
1294 | |
1295 // Function is used to parse both attributes: | |
1296 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
1297 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
1298 u2 max_locals, | |
1299 u4 code_attribute_length, | |
1300 constantPoolHandle cp, | |
1301 u2* localvariable_table_length, | |
1302 bool isLVTT, | |
1303 TRAPS) { | |
1304 ClassFileStream* cfs = stream(); | |
1305 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
1306 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
1307 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
1308 // Verify local variable table attribute has right length | |
1309 if (_need_verify) { | |
1310 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
1311 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
1312 } | |
1313 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
1314 assert(localvariable_table_start != NULL, "null local variable table"); | |
1315 if (!_need_verify) { | |
1316 cfs->skip_u2_fast(size); | |
1317 } else { | |
1318 cfs->guarantee_more(size * 2, CHECK_NULL); | |
1319 for(int i = 0; i < (*localvariable_table_length); i++) { | |
1320 u2 start_pc = cfs->get_u2_fast(); | |
1321 u2 length = cfs->get_u2_fast(); | |
1322 u2 name_index = cfs->get_u2_fast(); | |
1323 u2 descriptor_index = cfs->get_u2_fast(); | |
1324 u2 index = cfs->get_u2_fast(); | |
1325 // Assign to a u4 to avoid overflow | |
1326 u4 end_pc = (u4)start_pc + (u4)length; | |
1327 | |
1328 if (start_pc >= code_length) { | |
1329 classfile_parse_error( | |
1330 "Invalid start_pc %u in %s in class file %s", | |
1331 start_pc, tbl_name, CHECK_NULL); | |
1332 } | |
1333 if (end_pc > code_length) { | |
1334 classfile_parse_error( | |
1335 "Invalid length %u in %s in class file %s", | |
1336 length, tbl_name, CHECK_NULL); | |
1337 } | |
1338 int cp_size = cp->length(); | |
1339 guarantee_property( | |
1340 valid_cp_range(name_index, cp_size) && | |
1341 cp->tag_at(name_index).is_utf8(), | |
1342 "Name index %u in %s has bad constant type in class file %s", | |
1343 name_index, tbl_name, CHECK_NULL); | |
1344 guarantee_property( | |
1345 valid_cp_range(descriptor_index, cp_size) && | |
1346 cp->tag_at(descriptor_index).is_utf8(), | |
1347 "Signature index %u in %s has bad constant type in class file %s", | |
1348 descriptor_index, tbl_name, CHECK_NULL); | |
1349 | |
1350 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1351 symbolHandle sig(THREAD, cp->symbol_at(descriptor_index)); | |
1352 verify_legal_field_name(name, CHECK_NULL); | |
1353 u2 extra_slot = 0; | |
1354 if (!isLVTT) { | |
1355 verify_legal_field_signature(name, sig, CHECK_NULL); | |
1356 | |
1357 // 4894874: check special cases for double and long local variables | |
1358 if (sig() == vmSymbols::type_signature(T_DOUBLE) || | |
1359 sig() == vmSymbols::type_signature(T_LONG)) { | |
1360 extra_slot = 1; | |
1361 } | |
1362 } | |
1363 guarantee_property((index + extra_slot) < max_locals, | |
1364 "Invalid index %u in %s in class file %s", | |
1365 index, tbl_name, CHECK_NULL); | |
1366 } | |
1367 } | |
1368 return localvariable_table_start; | |
1369 } | |
1370 | |
1371 | |
1372 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
1373 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
1374 ClassFileStream* cfs = stream(); | |
1375 u2 index = 0; // index in the array with long/double occupying two slots | |
1376 u4 i1 = *u1_index; | |
1377 u4 i2 = *u2_index + 1; | |
1378 for(int i = 0; i < array_length; i++) { | |
1379 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
1380 index++; | |
1381 if (tag == ITEM_Long || tag == ITEM_Double) { | |
1382 index++; | |
1383 } else if (tag == ITEM_Object) { | |
1384 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
1385 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
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1386 is_klass_reference(cp, class_index), |
0 | 1387 "Bad class index %u in StackMap in class file %s", |
1388 class_index, CHECK); | |
1389 } else if (tag == ITEM_Uninitialized) { | |
1390 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
1391 guarantee_property( | |
1392 offset < code_length, | |
1393 "Bad uninitialized type offset %u in StackMap in class file %s", | |
1394 offset, CHECK); | |
1395 } else { | |
1396 guarantee_property( | |
1397 tag <= (u1)ITEM_Uninitialized, | |
1398 "Unknown variable type %u in StackMap in class file %s", | |
1399 tag, CHECK); | |
1400 } | |
1401 } | |
1402 u2_array[*u2_index] = index; | |
1403 *u1_index = i1; | |
1404 *u2_index = i2; | |
1405 } | |
1406 | |
1407 typeArrayOop ClassFileParser::parse_stackmap_table( | |
1408 u4 code_attribute_length, TRAPS) { | |
1409 if (code_attribute_length == 0) | |
1410 return NULL; | |
1411 | |
1412 ClassFileStream* cfs = stream(); | |
1413 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
1414 assert(stackmap_table_start != NULL, "null stackmap table"); | |
1415 | |
1416 // check code_attribute_length first | |
1417 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
1418 | |
1419 if (!_need_verify && !DumpSharedSpaces) { | |
1420 return NULL; | |
1421 } | |
1422 | |
1423 typeArrayOop stackmap_data = | |
1424 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
1425 | |
1426 stackmap_data->set_length(code_attribute_length); | |
1427 memcpy((void*)stackmap_data->byte_at_addr(0), | |
1428 (void*)stackmap_table_start, code_attribute_length); | |
1429 return stackmap_data; | |
1430 } | |
1431 | |
1432 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
1433 u4 method_attribute_length, | |
1434 constantPoolHandle cp, TRAPS) { | |
1435 ClassFileStream* cfs = stream(); | |
1436 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
1437 *checked_exceptions_length = cfs->get_u2_fast(); | |
1438 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1439 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
1440 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
1441 if (!_need_verify) { | |
1442 cfs->skip_u2_fast(size); | |
1443 } else { | |
1444 // Verify each value in the checked exception table | |
1445 u2 checked_exception; | |
1446 u2 len = *checked_exceptions_length; | |
1447 cfs->guarantee_more(2 * len, CHECK_NULL); | |
1448 for (int i = 0; i < len; i++) { | |
1449 checked_exception = cfs->get_u2_fast(); | |
1450 check_property( | |
1451 valid_cp_range(checked_exception, cp->length()) && | |
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1452 is_klass_reference(cp, checked_exception), |
0 | 1453 "Exception name has bad type at constant pool %u in class file %s", |
1454 checked_exception, CHECK_NULL); | |
1455 } | |
1456 } | |
1457 // check exceptions attribute length | |
1458 if (_need_verify) { | |
1459 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
1460 sizeof(u2) * size), | |
1461 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
1462 } | |
1463 return checked_exceptions_start; | |
1464 } | |
1465 | |
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1466 void ClassFileParser::throwIllegalSignature( |
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1467 const char* type, symbolHandle name, symbolHandle sig, TRAPS) { |
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1468 ResourceMark rm(THREAD); |
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1469 Exceptions::fthrow(THREAD_AND_LOCATION, |
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1470 vmSymbols::java_lang_ClassFormatError(), |
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1471 "%s \"%s\" in class %s has illegal signature \"%s\"", type, |
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1472 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); |
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1473 } |
0 | 1474 |
1475 #define MAX_ARGS_SIZE 255 | |
1476 #define MAX_CODE_SIZE 65535 | |
1477 #define INITIAL_MAX_LVT_NUMBER 256 | |
1478 | |
1479 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
1480 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
1481 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
1482 // entire method attribute is parsed. | |
1483 // | |
1484 // The promoted_flags parameter is used to pass relevant access_flags | |
1485 // from the method back up to the containing klass. These flag values | |
1486 // are added to klass's access_flags. | |
1487 | |
1488 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
1489 AccessFlags *promoted_flags, | |
1490 typeArrayHandle* method_annotations, | |
1491 typeArrayHandle* method_parameter_annotations, | |
1492 typeArrayHandle* method_default_annotations, | |
1493 TRAPS) { | |
1494 ClassFileStream* cfs = stream(); | |
1495 methodHandle nullHandle; | |
1496 ResourceMark rm(THREAD); | |
1497 // Parse fixed parts | |
1498 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
1499 | |
1500 int flags = cfs->get_u2_fast(); | |
1501 u2 name_index = cfs->get_u2_fast(); | |
1502 int cp_size = cp->length(); | |
1503 check_property( | |
1504 valid_cp_range(name_index, cp_size) && | |
1505 cp->tag_at(name_index).is_utf8(), | |
1506 "Illegal constant pool index %u for method name in class file %s", | |
1507 name_index, CHECK_(nullHandle)); | |
1508 symbolHandle name(THREAD, cp->symbol_at(name_index)); | |
1509 verify_legal_method_name(name, CHECK_(nullHandle)); | |
1510 | |
1511 u2 signature_index = cfs->get_u2_fast(); | |
1512 guarantee_property( | |
1513 valid_cp_range(signature_index, cp_size) && | |
1514 cp->tag_at(signature_index).is_utf8(), | |
1515 "Illegal constant pool index %u for method signature in class file %s", | |
1516 signature_index, CHECK_(nullHandle)); | |
1517 symbolHandle signature(THREAD, cp->symbol_at(signature_index)); | |
1518 | |
1519 AccessFlags access_flags; | |
1520 if (name == vmSymbols::class_initializer_name()) { | |
1521 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
1522 flags = JVM_ACC_STATIC; | |
1523 } else { | |
1524 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
1525 } | |
1526 | |
1527 int args_size = -1; // only used when _need_verify is true | |
1528 if (_need_verify) { | |
1529 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
1530 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
1531 if (args_size > MAX_ARGS_SIZE) { | |
1532 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
1533 } | |
1534 } | |
1535 | |
1536 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
1537 | |
1538 // Default values for code and exceptions attribute elements | |
1539 u2 max_stack = 0; | |
1540 u2 max_locals = 0; | |
1541 u4 code_length = 0; | |
1542 u1* code_start = 0; | |
1543 u2 exception_table_length = 0; | |
1544 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
1545 u2 checked_exceptions_length = 0; | |
1546 u2* checked_exceptions_start = NULL; | |
1547 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
1548 int linenumber_table_length = 0; | |
1549 int total_lvt_length = 0; | |
1550 u2 lvt_cnt = 0; | |
1551 u2 lvtt_cnt = 0; | |
1552 bool lvt_allocated = false; | |
1553 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1554 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
1555 u2* localvariable_table_length; | |
1556 u2** localvariable_table_start; | |
1557 u2* localvariable_type_table_length; | |
1558 u2** localvariable_type_table_start; | |
1559 bool parsed_code_attribute = false; | |
1560 bool parsed_checked_exceptions_attribute = false; | |
1561 bool parsed_stackmap_attribute = false; | |
1562 // stackmap attribute - JDK1.5 | |
1563 typeArrayHandle stackmap_data; | |
1564 u2 generic_signature_index = 0; | |
1565 u1* runtime_visible_annotations = NULL; | |
1566 int runtime_visible_annotations_length = 0; | |
1567 u1* runtime_invisible_annotations = NULL; | |
1568 int runtime_invisible_annotations_length = 0; | |
1569 u1* runtime_visible_parameter_annotations = NULL; | |
1570 int runtime_visible_parameter_annotations_length = 0; | |
1571 u1* runtime_invisible_parameter_annotations = NULL; | |
1572 int runtime_invisible_parameter_annotations_length = 0; | |
1573 u1* annotation_default = NULL; | |
1574 int annotation_default_length = 0; | |
1575 | |
1576 // Parse code and exceptions attribute | |
1577 u2 method_attributes_count = cfs->get_u2_fast(); | |
1578 while (method_attributes_count--) { | |
1579 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
1580 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
1581 u4 method_attribute_length = cfs->get_u4_fast(); | |
1582 check_property( | |
1583 valid_cp_range(method_attribute_name_index, cp_size) && | |
1584 cp->tag_at(method_attribute_name_index).is_utf8(), | |
1585 "Invalid method attribute name index %u in class file %s", | |
1586 method_attribute_name_index, CHECK_(nullHandle)); | |
1587 | |
1588 symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index); | |
1589 if (method_attribute_name == vmSymbols::tag_code()) { | |
1590 // Parse Code attribute | |
1591 if (_need_verify) { | |
1592 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
1593 "Code attribute in native or abstract methods in class file %s", | |
1594 CHECK_(nullHandle)); | |
1595 } | |
1596 if (parsed_code_attribute) { | |
1597 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
1598 } | |
1599 parsed_code_attribute = true; | |
1600 | |
1601 // Stack size, locals size, and code size | |
1602 if (_major_version == 45 && _minor_version <= 2) { | |
1603 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
1604 max_stack = cfs->get_u1_fast(); | |
1605 max_locals = cfs->get_u1_fast(); | |
1606 code_length = cfs->get_u2_fast(); | |
1607 } else { | |
1608 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
1609 max_stack = cfs->get_u2_fast(); | |
1610 max_locals = cfs->get_u2_fast(); | |
1611 code_length = cfs->get_u4_fast(); | |
1612 } | |
1613 if (_need_verify) { | |
1614 guarantee_property(args_size <= max_locals, | |
1615 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
1616 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
1617 "Invalid method Code length %u in class file %s", | |
1618 code_length, CHECK_(nullHandle)); | |
1619 } | |
1620 // Code pointer | |
1621 code_start = cfs->get_u1_buffer(); | |
1622 assert(code_start != NULL, "null code start"); | |
1623 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
1624 cfs->skip_u1_fast(code_length); | |
1625 | |
1626 // Exception handler table | |
1627 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
1628 exception_table_length = cfs->get_u2_fast(); | |
1629 if (exception_table_length > 0) { | |
1630 exception_handlers = | |
1631 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
1632 } | |
1633 | |
1634 // Parse additional attributes in code attribute | |
1635 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
1636 u2 code_attributes_count = cfs->get_u2_fast(); | |
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1637 |
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1638 unsigned int calculated_attribute_length = 0; |
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1639 |
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1640 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1641 calculated_attribute_length = |
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1642 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1643 } else { |
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1644 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1645 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1646 } |
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1647 calculated_attribute_length += |
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1648 code_length + |
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1649 sizeof(exception_table_length) + |
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1650 sizeof(code_attributes_count) + |
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1651 exception_table_length * |
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1652 ( sizeof(u2) + // start_pc |
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1653 sizeof(u2) + // end_pc |
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1654 sizeof(u2) + // handler_pc |
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1655 sizeof(u2) ); // catch_type_index |
0 | 1656 |
1657 while (code_attributes_count--) { | |
1658 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
1659 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
1660 u4 code_attribute_length = cfs->get_u4_fast(); | |
1661 calculated_attribute_length += code_attribute_length + | |
1662 sizeof(code_attribute_name_index) + | |
1663 sizeof(code_attribute_length); | |
1664 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
1665 cp->tag_at(code_attribute_name_index).is_utf8(), | |
1666 "Invalid code attribute name index %u in class file %s", | |
1667 code_attribute_name_index, | |
1668 CHECK_(nullHandle)); | |
1669 if (LoadLineNumberTables && | |
1670 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
1671 // Parse and compress line number table | |
1672 parse_linenumber_table(code_attribute_length, code_length, | |
1673 &linenumber_table, CHECK_(nullHandle)); | |
1674 | |
1675 } else if (LoadLocalVariableTables && | |
1676 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
1677 // Parse local variable table | |
1678 if (!lvt_allocated) { | |
1679 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1680 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1681 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1682 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1683 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1684 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1685 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1686 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1687 lvt_allocated = true; | |
1688 } | |
1689 if (lvt_cnt == max_lvt_cnt) { | |
1690 max_lvt_cnt <<= 1; | |
1691 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
1692 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
1693 } | |
1694 localvariable_table_start[lvt_cnt] = | |
1695 parse_localvariable_table(code_length, | |
1696 max_locals, | |
1697 code_attribute_length, | |
1698 cp, | |
1699 &localvariable_table_length[lvt_cnt], | |
1700 false, // is not LVTT | |
1701 CHECK_(nullHandle)); | |
1702 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
1703 lvt_cnt++; | |
1704 } else if (LoadLocalVariableTypeTables && | |
1705 _major_version >= JAVA_1_5_VERSION && | |
1706 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
1707 if (!lvt_allocated) { | |
1708 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1709 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1710 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1711 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1712 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1713 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
1714 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
1715 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
1716 lvt_allocated = true; | |
1717 } | |
1718 // Parse local variable type table | |
1719 if (lvtt_cnt == max_lvtt_cnt) { | |
1720 max_lvtt_cnt <<= 1; | |
1721 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
1722 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
1723 } | |
1724 localvariable_type_table_start[lvtt_cnt] = | |
1725 parse_localvariable_table(code_length, | |
1726 max_locals, | |
1727 code_attribute_length, | |
1728 cp, | |
1729 &localvariable_type_table_length[lvtt_cnt], | |
1730 true, // is LVTT | |
1731 CHECK_(nullHandle)); | |
1732 lvtt_cnt++; | |
1733 } else if (UseSplitVerifier && | |
1734 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
1735 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
1736 // Stack map is only needed by the new verifier in JDK1.5. | |
1737 if (parsed_stackmap_attribute) { | |
1738 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
1739 } | |
1740 typeArrayOop sm = | |
1741 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
1742 stackmap_data = typeArrayHandle(THREAD, sm); | |
1743 parsed_stackmap_attribute = true; | |
1744 } else { | |
1745 // Skip unknown attributes | |
1746 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
1747 } | |
1748 } | |
1749 // check method attribute length | |
1750 if (_need_verify) { | |
1751 guarantee_property(method_attribute_length == calculated_attribute_length, | |
1752 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
1753 } | |
1754 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
1755 // Parse Exceptions attribute | |
1756 if (parsed_checked_exceptions_attribute) { | |
1757 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
1758 } | |
1759 parsed_checked_exceptions_attribute = true; | |
1760 checked_exceptions_start = | |
1761 parse_checked_exceptions(&checked_exceptions_length, | |
1762 method_attribute_length, | |
1763 cp, CHECK_(nullHandle)); | |
1764 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
1765 if (method_attribute_length != 0) { | |
1766 classfile_parse_error( | |
1767 "Invalid Synthetic method attribute length %u in class file %s", | |
1768 method_attribute_length, CHECK_(nullHandle)); | |
1769 } | |
1770 // Should we check that there hasn't already been a synthetic attribute? | |
1771 access_flags.set_is_synthetic(); | |
1772 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
1773 if (method_attribute_length != 0) { | |
1774 classfile_parse_error( | |
1775 "Invalid Deprecated method attribute length %u in class file %s", | |
1776 method_attribute_length, CHECK_(nullHandle)); | |
1777 } | |
1778 } else if (_major_version >= JAVA_1_5_VERSION) { | |
1779 if (method_attribute_name == vmSymbols::tag_signature()) { | |
1780 if (method_attribute_length != 2) { | |
1781 classfile_parse_error( | |
1782 "Invalid Signature attribute length %u in class file %s", | |
1783 method_attribute_length, CHECK_(nullHandle)); | |
1784 } | |
1785 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
1786 generic_signature_index = cfs->get_u2_fast(); | |
1787 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
1788 runtime_visible_annotations_length = method_attribute_length; | |
1789 runtime_visible_annotations = cfs->get_u1_buffer(); | |
1790 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
1791 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
1792 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
1793 runtime_invisible_annotations_length = method_attribute_length; | |
1794 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
1795 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
1796 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
1797 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
1798 runtime_visible_parameter_annotations_length = method_attribute_length; | |
1799 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
1800 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
1801 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
1802 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
1803 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
1804 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
1805 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
1806 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
1807 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
1808 annotation_default_length = method_attribute_length; | |
1809 annotation_default = cfs->get_u1_buffer(); | |
1810 assert(annotation_default != NULL, "null annotation default"); | |
1811 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
1812 } else { | |
1813 // Skip unknown attributes | |
1814 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1815 } | |
1816 } else { | |
1817 // Skip unknown attributes | |
1818 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
1819 } | |
1820 } | |
1821 | |
1822 if (linenumber_table != NULL) { | |
1823 linenumber_table->write_terminator(); | |
1824 linenumber_table_length = linenumber_table->position(); | |
1825 } | |
1826 | |
1827 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
1828 if (_need_verify) { | |
1829 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
1830 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
1831 } | |
1832 | |
1833 // All sizing information for a methodOop is finally available, now create it | |
1834 methodOop m_oop = oopFactory::new_method( | |
1835 code_length, access_flags, linenumber_table_length, | |
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1837 methodOopDesc::IsSafeConc, CHECK_(nullHandle)); |
0 | 1838 methodHandle m (THREAD, m_oop); |
1839 | |
1840 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
1841 | |
1842 // Fill in information from fixed part (access_flags already set) | |
1843 m->set_constants(cp()); | |
1844 m->set_name_index(name_index); | |
1845 m->set_signature_index(signature_index); | |
1846 m->set_generic_signature_index(generic_signature_index); | |
1847 #ifdef CC_INTERP | |
1848 // hmm is there a gc issue here?? | |
1849 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
1850 m->set_result_index(rtf.type()); | |
1851 #endif | |
1852 | |
1853 if (args_size >= 0) { | |
1854 m->set_size_of_parameters(args_size); | |
1855 } else { | |
1856 m->compute_size_of_parameters(THREAD); | |
1857 } | |
1858 #ifdef ASSERT | |
1859 if (args_size >= 0) { | |
1860 m->compute_size_of_parameters(THREAD); | |
1861 assert(args_size == m->size_of_parameters(), ""); | |
1862 } | |
1863 #endif | |
1864 | |
1865 // Fill in code attribute information | |
1866 m->set_max_stack(max_stack); | |
1867 m->set_max_locals(max_locals); | |
1868 m->constMethod()->set_stackmap_data(stackmap_data()); | |
1869 | |
1870 /** | |
1871 * The exception_table field is the flag used to indicate | |
1872 * that the methodOop and it's associated constMethodOop are partially | |
1873 * initialized and thus are exempt from pre/post GC verification. Once | |
1874 * the field is set, the oops are considered fully initialized so make | |
1875 * sure that the oops can pass verification when this field is set. | |
1876 */ | |
1877 m->set_exception_table(exception_handlers()); | |
1878 | |
1879 // Copy byte codes | |
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1880 m->set_code(code_start); |
0 | 1881 |
1882 // Copy line number table | |
1883 if (linenumber_table != NULL) { | |
1884 memcpy(m->compressed_linenumber_table(), | |
1885 linenumber_table->buffer(), linenumber_table_length); | |
1886 } | |
1887 | |
1888 // Copy checked exceptions | |
1889 if (checked_exceptions_length > 0) { | |
1890 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
1891 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
1892 } | |
1893 | |
1894 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
1895 * | |
1896 * Rules for LVT's and LVTT's are: | |
1897 * - There can be any number of LVT's and LVTT's. | |
1898 * - If there are n LVT's, it is the same as if there was just | |
1899 * one LVT containing all the entries from the n LVT's. | |
1900 * - There may be no more than one LVT entry per local variable. | |
1901 * Two LVT entries are 'equal' if these fields are the same: | |
1902 * start_pc, length, name, slot | |
1903 * - There may be no more than one LVTT entry per each LVT entry. | |
1904 * Each LVTT entry has to match some LVT entry. | |
1905 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
1906 */ | |
1907 if (total_lvt_length > 0) { | |
1908 int tbl_no, idx; | |
1909 | |
1910 promoted_flags->set_has_localvariable_table(); | |
1911 | |
1912 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
1913 initialize_hashtable(lvt_Hash); | |
1914 | |
1915 // To fill LocalVariableTable in | |
1916 Classfile_LVT_Element* cf_lvt; | |
1917 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
1918 | |
1919 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
1920 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
1921 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
1922 copy_lvt_element(&cf_lvt[idx], lvt); | |
1923 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
1924 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
1925 && _need_verify | |
1926 && _major_version >= JAVA_1_5_VERSION ) { | |
1927 clear_hashtable(lvt_Hash); | |
1928 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
1929 "entry for '%s' in class file %s", | |
1930 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
1931 CHECK_(nullHandle)); | |
1932 } | |
1933 } | |
1934 } | |
1935 | |
1936 // To merge LocalVariableTable and LocalVariableTypeTable | |
1937 Classfile_LVT_Element* cf_lvtt; | |
1938 LocalVariableTableElement lvtt_elem; | |
1939 | |
1940 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
1941 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
1942 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
1943 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
1944 int index = hash(&lvtt_elem); | |
1945 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
1946 if (entry == NULL) { | |
1947 if (_need_verify) { | |
1948 clear_hashtable(lvt_Hash); | |
1949 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
1950 "does not match any LVT entry", | |
1951 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1952 CHECK_(nullHandle)); | |
1953 } | |
1954 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
1955 clear_hashtable(lvt_Hash); | |
1956 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
1957 "entry for '%s' in class file %s", | |
1958 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
1959 CHECK_(nullHandle)); | |
1960 } else { | |
1961 // to add generic signatures into LocalVariableTable | |
1962 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
1963 } | |
1964 } | |
1965 } | |
1966 clear_hashtable(lvt_Hash); | |
1967 } | |
1968 | |
1969 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
1970 runtime_visible_annotations_length, | |
1971 runtime_invisible_annotations, | |
1972 runtime_invisible_annotations_length, | |
1973 CHECK_(nullHandle)); | |
1974 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
1975 runtime_visible_parameter_annotations_length, | |
1976 runtime_invisible_parameter_annotations, | |
1977 runtime_invisible_parameter_annotations_length, | |
1978 CHECK_(nullHandle)); | |
1979 *method_default_annotations = assemble_annotations(annotation_default, | |
1980 annotation_default_length, | |
1981 NULL, | |
1982 0, | |
1983 CHECK_(nullHandle)); | |
1984 | |
1985 if (name() == vmSymbols::finalize_method_name() && | |
1986 signature() == vmSymbols::void_method_signature()) { | |
1987 if (m->is_empty_method()) { | |
1988 _has_empty_finalizer = true; | |
1989 } else { | |
1990 _has_finalizer = true; | |
1991 } | |
1992 } | |
1993 if (name() == vmSymbols::object_initializer_name() && | |
1994 signature() == vmSymbols::void_method_signature() && | |
1995 m->is_vanilla_constructor()) { | |
1996 _has_vanilla_constructor = true; | |
1997 } | |
1998 | |
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1999 if (EnableMethodHandles && (m->is_method_handle_invoke() || |
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2000 m->is_method_handle_adapter())) { |
710 | 2001 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), |
2002 "Method handle invokers must be defined internally to the VM", nullHandle); | |
2003 } | |
2004 | |
0 | 2005 return m; |
2006 } | |
2007 | |
2008 | |
2009 // The promoted_flags parameter is used to pass relevant access_flags | |
2010 // from the methods back up to the containing klass. These flag values | |
2011 // are added to klass's access_flags. | |
2012 | |
2013 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
2014 AccessFlags* promoted_flags, | |
2015 bool* has_final_method, | |
2016 objArrayOop* methods_annotations_oop, | |
2017 objArrayOop* methods_parameter_annotations_oop, | |
2018 objArrayOop* methods_default_annotations_oop, | |
2019 TRAPS) { | |
2020 ClassFileStream* cfs = stream(); | |
2021 objArrayHandle nullHandle; | |
2022 typeArrayHandle method_annotations; | |
2023 typeArrayHandle method_parameter_annotations; | |
2024 typeArrayHandle method_default_annotations; | |
2025 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
2026 u2 length = cfs->get_u2_fast(); | |
2027 if (length == 0) { | |
2028 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
2029 } else { | |
2030 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
2031 objArrayHandle methods(THREAD, m); | |
2032 HandleMark hm(THREAD); | |
2033 objArrayHandle methods_annotations; | |
2034 objArrayHandle methods_parameter_annotations; | |
2035 objArrayHandle methods_default_annotations; | |
2036 for (int index = 0; index < length; index++) { | |
2037 methodHandle method = parse_method(cp, is_interface, | |
2038 promoted_flags, | |
2039 &method_annotations, | |
2040 &method_parameter_annotations, | |
2041 &method_default_annotations, | |
2042 CHECK_(nullHandle)); | |
2043 if (method->is_final()) { | |
2044 *has_final_method = true; | |
2045 } | |
2046 methods->obj_at_put(index, method()); | |
2047 if (method_annotations.not_null()) { | |
2048 if (methods_annotations.is_null()) { | |
2049 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
2050 methods_annotations = objArrayHandle(THREAD, md); | |
2051 } | |
2052 methods_annotations->obj_at_put(index, method_annotations()); | |
2053 } | |
2054 if (method_parameter_annotations.not_null()) { | |
2055 if (methods_parameter_annotations.is_null()) { | |
2056 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
2057 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
2058 } | |
2059 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
2060 } | |
2061 if (method_default_annotations.not_null()) { | |
2062 if (methods_default_annotations.is_null()) { | |
2063 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
2064 methods_default_annotations = objArrayHandle(THREAD, md); | |
2065 } | |
2066 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
2067 } | |
2068 } | |
2069 if (_need_verify && length > 1) { | |
2070 // Check duplicated methods | |
2071 ResourceMark rm(THREAD); | |
2072 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
2073 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
2074 initialize_hashtable(names_and_sigs); | |
2075 bool dup = false; | |
2076 { | |
2077 debug_only(No_Safepoint_Verifier nsv;) | |
2078 for (int i = 0; i < length; i++) { | |
2079 methodOop m = (methodOop)methods->obj_at(i); | |
2080 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
2081 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
2082 dup = true; | |
2083 break; | |
2084 } | |
2085 } | |
2086 } | |
2087 if (dup) { | |
2088 classfile_parse_error("Duplicate method name&signature in class file %s", | |
2089 CHECK_(nullHandle)); | |
2090 } | |
2091 } | |
2092 | |
2093 *methods_annotations_oop = methods_annotations(); | |
2094 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
2095 *methods_default_annotations_oop = methods_default_annotations(); | |
2096 | |
2097 return methods; | |
2098 } | |
2099 } | |
2100 | |
2101 | |
2102 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
2103 objArrayHandle methods_annotations, | |
2104 objArrayHandle methods_parameter_annotations, | |
2105 objArrayHandle methods_default_annotations, | |
2106 TRAPS) { | |
2107 typeArrayHandle nullHandle; | |
2108 int length = methods()->length(); | |
2109 // If JVMTI original method ordering is enabled we have to | |
2110 // remember the original class file ordering. | |
2111 // We temporarily use the vtable_index field in the methodOop to store the | |
2112 // class file index, so we can read in after calling qsort. | |
2113 if (JvmtiExport::can_maintain_original_method_order()) { | |
2114 for (int index = 0; index < length; index++) { | |
2115 methodOop m = methodOop(methods->obj_at(index)); | |
2116 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
2117 m->set_vtable_index(index); | |
2118 } | |
2119 } | |
2120 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
2121 // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare | |
2122 methodOopDesc::sort_methods(methods(), | |
2123 methods_annotations(), | |
2124 methods_parameter_annotations(), | |
2125 methods_default_annotations()); | |
2126 | |
2127 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
2128 if (JvmtiExport::can_maintain_original_method_order()) { | |
2129 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
2130 typeArrayHandle method_ordering(THREAD, new_ordering); | |
2131 for (int index = 0; index < length; index++) { | |
2132 methodOop m = methodOop(methods->obj_at(index)); | |
2133 int old_index = m->vtable_index(); | |
2134 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
2135 method_ordering->int_at_put(index, old_index); | |
2136 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
2137 } | |
2138 return method_ordering; | |
2139 } else { | |
2140 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
2141 } | |
2142 } | |
2143 | |
2144 | |
2145 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2146 ClassFileStream* cfs = stream(); | |
2147 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
2148 u2 sourcefile_index = cfs->get_u2_fast(); | |
2149 check_property( | |
2150 valid_cp_range(sourcefile_index, cp->length()) && | |
2151 cp->tag_at(sourcefile_index).is_utf8(), | |
2152 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
2153 sourcefile_index, CHECK); | |
2154 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
2155 } | |
2156 | |
2157 | |
2158 | |
2159 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
2160 instanceKlassHandle k, | |
2161 int length, TRAPS) { | |
2162 ClassFileStream* cfs = stream(); | |
2163 u1* sde_buffer = cfs->get_u1_buffer(); | |
2164 assert(sde_buffer != NULL, "null sde buffer"); | |
2165 | |
2166 // Don't bother storing it if there is no way to retrieve it | |
2167 if (JvmtiExport::can_get_source_debug_extension()) { | |
2168 // Optimistically assume that only 1 byte UTF format is used | |
2169 // (common case) | |
2170 symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer, | |
2171 length, CHECK); | |
2172 k->set_source_debug_extension(sde_symbol); | |
2173 } | |
2174 // Got utf8 string, set stream position forward | |
2175 cfs->skip_u1(length, CHECK); | |
2176 } | |
2177 | |
2178 | |
2179 // Inner classes can be static, private or protected (classic VM does this) | |
2180 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
2181 | |
2182 // Return number of classes in the inner classes attribute table | |
2183 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2184 ClassFileStream* cfs = stream(); | |
2185 cfs->guarantee_more(2, CHECK_0); // length | |
2186 u2 length = cfs->get_u2_fast(); | |
2187 | |
2188 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
2189 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
2190 typeArrayHandle inner_classes(THREAD, ic); | |
2191 int index = 0; | |
2192 int cp_size = cp->length(); | |
2193 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
2194 for (int n = 0; n < length; n++) { | |
2195 // Inner class index | |
2196 u2 inner_class_info_index = cfs->get_u2_fast(); | |
2197 check_property( | |
2198 inner_class_info_index == 0 || | |
2199 (valid_cp_range(inner_class_info_index, cp_size) && | |
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2200 is_klass_reference(cp, inner_class_info_index)), |
0 | 2201 "inner_class_info_index %u has bad constant type in class file %s", |
2202 inner_class_info_index, CHECK_0); | |
2203 // Outer class index | |
2204 u2 outer_class_info_index = cfs->get_u2_fast(); | |
2205 check_property( | |
2206 outer_class_info_index == 0 || | |
2207 (valid_cp_range(outer_class_info_index, cp_size) && | |
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2208 is_klass_reference(cp, outer_class_info_index)), |
0 | 2209 "outer_class_info_index %u has bad constant type in class file %s", |
2210 outer_class_info_index, CHECK_0); | |
2211 // Inner class name | |
2212 u2 inner_name_index = cfs->get_u2_fast(); | |
2213 check_property( | |
2214 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
2215 cp->tag_at(inner_name_index).is_utf8()), | |
2216 "inner_name_index %u has bad constant type in class file %s", | |
2217 inner_name_index, CHECK_0); | |
2218 if (_need_verify) { | |
2219 guarantee_property(inner_class_info_index != outer_class_info_index, | |
2220 "Class is both outer and inner class in class file %s", CHECK_0); | |
2221 } | |
2222 // Access flags | |
2223 AccessFlags inner_access_flags; | |
2224 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
2225 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2226 // Set abstract bit for old class files for backward compatibility | |
2227 flags |= JVM_ACC_ABSTRACT; | |
2228 } | |
2229 verify_legal_class_modifiers(flags, CHECK_0); | |
2230 inner_access_flags.set_flags(flags); | |
2231 | |
2232 inner_classes->short_at_put(index++, inner_class_info_index); | |
2233 inner_classes->short_at_put(index++, outer_class_info_index); | |
2234 inner_classes->short_at_put(index++, inner_name_index); | |
2235 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
2236 } | |
2237 | |
2238 // 4347400: make sure there's no duplicate entry in the classes array | |
2239 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2240 for(int i = 0; i < inner_classes->length(); i += 4) { | |
2241 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
2242 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
2243 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
2244 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
2245 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
2246 "Duplicate entry in InnerClasses in class file %s", | |
2247 CHECK_0); | |
2248 } | |
2249 } | |
2250 } | |
2251 | |
2252 // Update instanceKlass with inner class info. | |
2253 k->set_inner_classes(inner_classes()); | |
2254 return length; | |
2255 } | |
2256 | |
2257 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2258 k->set_is_synthetic(); | |
2259 } | |
2260 | |
2261 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2262 ClassFileStream* cfs = stream(); | |
2263 u2 signature_index = cfs->get_u2(CHECK); | |
2264 check_property( | |
2265 valid_cp_range(signature_index, cp->length()) && | |
2266 cp->tag_at(signature_index).is_utf8(), | |
2267 "Invalid constant pool index %u in Signature attribute in class file %s", | |
2268 signature_index, CHECK); | |
2269 k->set_generic_signature(cp->symbol_at(signature_index)); | |
2270 } | |
2271 | |
2272 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
2273 ClassFileStream* cfs = stream(); | |
2274 // Set inner classes attribute to default sentinel | |
2275 k->set_inner_classes(Universe::the_empty_short_array()); | |
2276 cfs->guarantee_more(2, CHECK); // attributes_count | |
2277 u2 attributes_count = cfs->get_u2_fast(); | |
2278 bool parsed_sourcefile_attribute = false; | |
2279 bool parsed_innerclasses_attribute = false; | |
2280 bool parsed_enclosingmethod_attribute = false; | |
2281 u1* runtime_visible_annotations = NULL; | |
2282 int runtime_visible_annotations_length = 0; | |
2283 u1* runtime_invisible_annotations = NULL; | |
2284 int runtime_invisible_annotations_length = 0; | |
2285 // Iterate over attributes | |
2286 while (attributes_count--) { | |
2287 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
2288 u2 attribute_name_index = cfs->get_u2_fast(); | |
2289 u4 attribute_length = cfs->get_u4_fast(); | |
2290 check_property( | |
2291 valid_cp_range(attribute_name_index, cp->length()) && | |
2292 cp->tag_at(attribute_name_index).is_utf8(), | |
2293 "Attribute name has bad constant pool index %u in class file %s", | |
2294 attribute_name_index, CHECK); | |
2295 symbolOop tag = cp->symbol_at(attribute_name_index); | |
2296 if (tag == vmSymbols::tag_source_file()) { | |
2297 // Check for SourceFile tag | |
2298 if (_need_verify) { | |
2299 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
2300 } | |
2301 if (parsed_sourcefile_attribute) { | |
2302 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
2303 } else { | |
2304 parsed_sourcefile_attribute = true; | |
2305 } | |
2306 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
2307 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
2308 // Check for SourceDebugExtension tag | |
2309 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
2310 } else if (tag == vmSymbols::tag_inner_classes()) { | |
2311 // Check for InnerClasses tag | |
2312 if (parsed_innerclasses_attribute) { | |
2313 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
2314 } else { | |
2315 parsed_innerclasses_attribute = true; | |
2316 } | |
2317 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
2318 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
2319 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
2320 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
2321 } | |
2322 } else if (tag == vmSymbols::tag_synthetic()) { | |
2323 // Check for Synthetic tag | |
2324 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
2325 if (attribute_length != 0) { | |
2326 classfile_parse_error( | |
2327 "Invalid Synthetic classfile attribute length %u in class file %s", | |
2328 attribute_length, CHECK); | |
2329 } | |
2330 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
2331 } else if (tag == vmSymbols::tag_deprecated()) { | |
2332 // Check for Deprecatd tag - 4276120 | |
2333 if (attribute_length != 0) { | |
2334 classfile_parse_error( | |
2335 "Invalid Deprecated classfile attribute length %u in class file %s", | |
2336 attribute_length, CHECK); | |
2337 } | |
2338 } else if (_major_version >= JAVA_1_5_VERSION) { | |
2339 if (tag == vmSymbols::tag_signature()) { | |
2340 if (attribute_length != 2) { | |
2341 classfile_parse_error( | |
2342 "Wrong Signature attribute length %u in class file %s", | |
2343 attribute_length, CHECK); | |
2344 } | |
2345 parse_classfile_signature_attribute(cp, k, CHECK); | |
2346 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
2347 runtime_visible_annotations_length = attribute_length; | |
2348 runtime_visible_annotations = cfs->get_u1_buffer(); | |
2349 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
2350 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
2351 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
2352 runtime_invisible_annotations_length = attribute_length; | |
2353 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
2354 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
2355 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
2356 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
2357 if (parsed_enclosingmethod_attribute) { | |
2358 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
2359 } else { | |
2360 parsed_enclosingmethod_attribute = true; | |
2361 } | |
2362 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
2363 u2 class_index = cfs->get_u2_fast(); | |
2364 u2 method_index = cfs->get_u2_fast(); | |
2365 if (class_index == 0) { | |
2366 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
2367 } | |
2368 // Validate the constant pool indices and types | |
2369 if (!cp->is_within_bounds(class_index) || | |
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2370 !is_klass_reference(cp, class_index)) { |
0 | 2371 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
2372 } | |
2373 if (method_index != 0 && | |
2374 (!cp->is_within_bounds(method_index) || | |
2375 !cp->tag_at(method_index).is_name_and_type())) { | |
2376 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
2377 } | |
2378 k->set_enclosing_method_indices(class_index, method_index); | |
2379 } else { | |
2380 // Unknown attribute | |
2381 cfs->skip_u1(attribute_length, CHECK); | |
2382 } | |
2383 } else { | |
2384 // Unknown attribute | |
2385 cfs->skip_u1(attribute_length, CHECK); | |
2386 } | |
2387 } | |
2388 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
2389 runtime_visible_annotations_length, | |
2390 runtime_invisible_annotations, | |
2391 runtime_invisible_annotations_length, | |
2392 CHECK); | |
2393 k->set_class_annotations(annotations()); | |
2394 } | |
2395 | |
2396 | |
2397 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
2398 int runtime_visible_annotations_length, | |
2399 u1* runtime_invisible_annotations, | |
2400 int runtime_invisible_annotations_length, TRAPS) { | |
2401 typeArrayHandle annotations; | |
2402 if (runtime_visible_annotations != NULL || | |
2403 runtime_invisible_annotations != NULL) { | |
2404 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
2405 runtime_invisible_annotations_length, CHECK_(annotations)); | |
2406 annotations = typeArrayHandle(THREAD, anno); | |
2407 if (runtime_visible_annotations != NULL) { | |
2408 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
2409 } | |
2410 if (runtime_invisible_annotations != NULL) { | |
2411 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
2412 } | |
2413 } | |
2414 return annotations; | |
2415 } | |
2416 | |
2417 | |
2418 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
2419 KlassHandle h_k (THREAD, fd->field_holder()); | |
2420 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
2421 if (fd->has_initial_value()) { | |
2422 BasicType t = fd->field_type(); | |
2423 switch (t) { | |
2424 case T_BYTE: | |
2425 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
2426 break; | |
2427 case T_BOOLEAN: | |
2428 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
2429 break; | |
2430 case T_CHAR: | |
2431 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
2432 break; | |
2433 case T_SHORT: | |
2434 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
2435 break; | |
2436 case T_INT: | |
2437 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
2438 break; | |
2439 case T_FLOAT: | |
2440 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
2441 break; | |
2442 case T_DOUBLE: | |
2443 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
2444 break; | |
2445 case T_LONG: | |
2446 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
2447 break; | |
2448 case T_OBJECT: | |
2449 { | |
2450 #ifdef ASSERT | |
2451 symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK); | |
2452 assert(fd->signature() == sym, "just checking"); | |
2453 #endif | |
2454 oop string = fd->string_initial_value(CHECK); | |
2455 h_k()->obj_field_put(fd->offset(), string); | |
2456 } | |
2457 break; | |
2458 default: | |
2459 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
2460 "Illegal ConstantValue attribute in class file"); | |
2461 } | |
2462 } | |
2463 } | |
2464 | |
2465 | |
2466 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
2467 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
2468 // This code is for compatibility with earlier jdk's that do not | |
2469 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
2470 // the check for the "discovered" field should issue a warning if | |
2471 // the field is not found. For 1.6 this code should be issue a | |
2472 // fatal error if the "discovered" field is not found. | |
2473 // | |
2474 // Increment fac.nonstatic_oop_count so that the start of the | |
2475 // next type of non-static oops leaves room for the fake oop. | |
2476 // Do not increment next_nonstatic_oop_offset so that the | |
2477 // fake oop is place after the java.lang.ref.Reference oop | |
2478 // fields. | |
2479 // | |
2480 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2481 // field. If it is not present, artifically create a field for it. | |
2482 // This allows this VM to run on early JDK where the field is not | |
2483 // present. | |
2484 | |
2485 // | |
2486 // Increment fac.nonstatic_oop_count so that the start of the | |
2487 // next type of non-static oops leaves room for the fake oop. | |
2488 // Do not increment next_nonstatic_oop_offset so that the | |
2489 // fake oop is place after the java.lang.ref.Reference oop | |
2490 // fields. | |
2491 // | |
2492 // Check the fields in java.lang.ref.Reference for the "discovered" | |
2493 // field. If it is not present, artifically create a field for it. | |
2494 // This allows this VM to run on early JDK where the field is not | |
2495 // present. | |
2496 int reference_sig_index = 0; | |
2497 int reference_name_index = 0; | |
2498 int reference_index = 0; | |
2499 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
2500 const int n = (*fields_ptr)()->length(); | |
2501 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
2502 int name_index = | |
2503 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
2504 int sig_index = | |
2505 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
2506 symbolOop f_name = cp->symbol_at(name_index); | |
2507 symbolOop f_sig = cp->symbol_at(sig_index); | |
2508 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { | |
2509 // Save the index for reference signature for later use. | |
2510 // The fake discovered field does not entries in the | |
2511 // constant pool so the index for its signature cannot | |
2512 // be extracted from the constant pool. It will need | |
2513 // later, however. It's signature is vmSymbols::reference_signature() | |
2514 // so same an index for that signature. | |
2515 reference_sig_index = sig_index; | |
2516 reference_name_index = name_index; | |
2517 reference_index = i; | |
2518 } | |
2519 if (f_name == vmSymbols::reference_discovered_name() && | |
2520 f_sig == vmSymbols::reference_signature()) { | |
2521 // The values below are fake but will force extra | |
2522 // non-static oop fields and a corresponding non-static | |
2523 // oop map block to be allocated. | |
2524 extra = 0; | |
2525 break; | |
2526 } | |
2527 } | |
2528 if (extra != 0) { | |
2529 fac_ptr->nonstatic_oop_count += extra; | |
2530 // Add the additional entry to "fields" so that the klass | |
2531 // contains the "discoverd" field and the field will be initialized | |
2532 // in instances of the object. | |
2533 int fields_with_fix_length = (*fields_ptr)()->length() + | |
2534 instanceKlass::next_offset; | |
2535 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
2536 fields_with_fix_length, CHECK); | |
2537 typeArrayHandle fields_with_fix(THREAD, ff); | |
2538 | |
2539 // Take everything from the original but the length. | |
2540 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
2541 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
2542 } | |
2543 | |
2544 // Add the fake field at the end. | |
2545 int i = (*fields_ptr)->length(); | |
2546 // There is no name index for the fake "discovered" field nor | |
2547 // signature but a signature is needed so that the field will | |
2548 // be properly initialized. Use one found for | |
2549 // one of the other reference fields. Be sure the index for the | |
2550 // name is 0. In fieldDescriptor::initialize() the index of the | |
2551 // name is checked. That check is by passed for the last nonstatic | |
2552 // oop field in a java.lang.ref.Reference which is assumed to be | |
2553 // this artificial "discovered" field. An assertion checks that | |
2554 // the name index is 0. | |
2555 assert(reference_index != 0, "Missing signature for reference"); | |
2556 | |
2557 int j; | |
2558 for (j = 0; j < instanceKlass::next_offset; j++) { | |
2559 fields_with_fix->ushort_at_put(i + j, | |
2560 (*fields_ptr)->ushort_at(reference_index +j)); | |
2561 } | |
2562 // Clear the public access flag and set the private access flag. | |
2563 short flags; | |
2564 flags = | |
2565 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
2566 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
2567 flags = flags & (~JVM_ACC_PUBLIC); | |
2568 flags = flags | JVM_ACC_PRIVATE; | |
2569 AccessFlags access_flags; | |
2570 access_flags.set_flags(flags); | |
2571 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
2572 assert(access_flags.is_private(), "Failed to set private flag"); | |
2573 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
2574 flags); | |
2575 | |
2576 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
2577 == reference_name_index, "The fake reference name is incorrect"); | |
2578 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
2579 == reference_sig_index, "The fake reference signature is incorrect"); | |
2580 // The type of the field is stored in the low_offset entry during | |
2581 // parsing. | |
2582 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
2583 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
2584 | |
2585 // "fields" is allocated in the permanent generation. Disgard | |
2586 // it and let it be collected. | |
2587 (*fields_ptr) = fields_with_fix; | |
2588 } | |
2589 return; | |
2590 } | |
2591 | |
2592 | |
2593 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
2594 FieldAllocationCount *fac_ptr, TRAPS) { | |
2595 // Add fake fields for java.lang.Class instances | |
2596 // | |
2597 // This is not particularly nice. We should consider adding a | |
2598 // private transient object field at the Java level to | |
2599 // java.lang.Class. Alternatively we could add a subclass of | |
2600 // instanceKlass which provides an accessor and size computer for | |
2601 // this field, but that appears to be more code than this hack. | |
2602 // | |
2603 // NOTE that we wedge these in at the beginning rather than the | |
2604 // end of the object because the Class layout changed between JDK | |
2605 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
2606 // nonstatic oop fields were added at the Java level. The offsets | |
2607 // of these fake fields can't change between these two JDK | |
2608 // versions because when the offsets are computed at bootstrap | |
2609 // time we don't know yet which version of the JDK we're running in. | |
2610 | |
2611 // The values below are fake but will force two non-static oop fields and | |
2612 // a corresponding non-static oop map block to be allocated. | |
2613 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
2614 fac_ptr->nonstatic_oop_count += extra; | |
2615 } | |
2616 | |
2617 | |
2618 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
2619 // Cause the extra fake fields in java.lang.Class to show up before | |
2620 // the Java fields for layout compatibility between 1.3 and 1.4 | |
2621 // Incrementing next_nonstatic_oop_offset here advances the | |
2622 // location where the real java fields are placed. | |
2623 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
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2624 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
0 | 2625 } |
2626 | |
2627 | |
710 | 2628 // Force MethodHandle.vmentry to be an unmanaged pointer. |
2629 // There is no way for a classfile to express this, so we must help it. | |
2630 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
2631 typeArrayHandle* fields_ptr, | |
2632 FieldAllocationCount *fac_ptr, | |
2633 TRAPS) { | |
2634 // Add fake fields for java.dyn.MethodHandle instances | |
2635 // | |
2636 // This is not particularly nice, but since there is no way to express | |
2637 // a native wordSize field in Java, we must do it at this level. | |
2638 | |
2639 if (!EnableMethodHandles) return; | |
2640 | |
2641 int word_sig_index = 0; | |
2642 const int cp_size = cp->length(); | |
2643 for (int index = 1; index < cp_size; index++) { | |
2644 if (cp->tag_at(index).is_utf8() && | |
2645 cp->symbol_at(index) == vmSymbols::machine_word_signature()) { | |
2646 word_sig_index = index; | |
2647 break; | |
2648 } | |
2649 } | |
2650 | |
2651 if (word_sig_index == 0) | |
2652 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
2653 "missing I or J signature (for vmentry) in java.dyn.MethodHandle"); | |
2654 | |
2655 bool found_vmentry = false; | |
2656 | |
2657 const int n = (*fields_ptr)()->length(); | |
2658 for (int i = 0; i < n; i += instanceKlass::next_offset) { | |
2659 int name_index = (*fields_ptr)->ushort_at(i + instanceKlass::name_index_offset); | |
2660 int sig_index = (*fields_ptr)->ushort_at(i + instanceKlass::signature_index_offset); | |
2661 int acc_flags = (*fields_ptr)->ushort_at(i + instanceKlass::access_flags_offset); | |
2662 symbolOop f_name = cp->symbol_at(name_index); | |
2663 symbolOop f_sig = cp->symbol_at(sig_index); | |
2664 if (f_sig == vmSymbols::byte_signature() && | |
2665 f_name == vmSymbols::vmentry_name() && | |
2666 (acc_flags & JVM_ACC_STATIC) == 0) { | |
2667 // Adjust the field type from byte to an unmanaged pointer. | |
2668 assert(fac_ptr->nonstatic_byte_count > 0, ""); | |
2669 fac_ptr->nonstatic_byte_count -= 1; | |
2670 (*fields_ptr)->ushort_at_put(i + instanceKlass::signature_index_offset, | |
2671 word_sig_index); | |
1108 | 2672 fac_ptr->nonstatic_word_count += 1; |
2673 | |
2674 FieldAllocationType atype = (FieldAllocationType) (*fields_ptr)->ushort_at(i + instanceKlass::low_offset); | |
710 | 2675 assert(atype == NONSTATIC_BYTE, ""); |
2676 FieldAllocationType new_atype = NONSTATIC_WORD; | |
1108 | 2677 (*fields_ptr)->ushort_at_put(i + instanceKlass::low_offset, new_atype); |
710 | 2678 |
2679 found_vmentry = true; | |
2680 break; | |
2681 } | |
2682 } | |
2683 | |
2684 if (!found_vmentry) | |
2685 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
2686 "missing vmentry byte field in java.dyn.MethodHandle"); | |
2687 | |
2688 } | |
2689 | |
2690 | |
0 | 2691 instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name, |
2692 Handle class_loader, | |
2693 Handle protection_domain, | |
710 | 2694 KlassHandle host_klass, |
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2695 GrowableArray<Handle>* cp_patches, |
0 | 2696 symbolHandle& parsed_name, |
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2697 bool verify, |
0 | 2698 TRAPS) { |
2699 // So that JVMTI can cache class file in the state before retransformable agents | |
2700 // have modified it | |
2701 unsigned char *cached_class_file_bytes = NULL; | |
2702 jint cached_class_file_length; | |
2703 | |
2704 ClassFileStream* cfs = stream(); | |
2705 // Timing | |
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2706 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
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2707 JavaThread* jt = (JavaThread*) THREAD; |
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2708 |
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2709 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(), |
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2710 ClassLoader::perf_class_parse_selftime(), |
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2711 NULL, |
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2712 jt->get_thread_stat()->perf_recursion_counts_addr(), |
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2713 jt->get_thread_stat()->perf_timers_addr(), |
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2714 PerfClassTraceTime::PARSE_CLASS); |
0 | 2715 |
2716 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
2717 | |
2718 if (JvmtiExport::should_post_class_file_load_hook()) { | |
2719 unsigned char* ptr = cfs->buffer(); | |
2720 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
2721 | |
2722 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
2723 &ptr, &end_ptr, | |
2724 &cached_class_file_bytes, | |
2725 &cached_class_file_length); | |
2726 | |
2727 if (ptr != cfs->buffer()) { | |
2728 // JVMTI agent has modified class file data. | |
2729 // Set new class file stream using JVMTI agent modified | |
2730 // class file data. | |
2731 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
2732 set_stream(cfs); | |
2733 } | |
2734 } | |
2735 | |
710 | 2736 _host_klass = host_klass; |
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2737 _cp_patches = cp_patches; |
0 | 2738 |
2739 instanceKlassHandle nullHandle; | |
2740 | |
2741 // Figure out whether we can skip format checking (matching classic VM behavior) | |
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2742 _need_verify = Verifier::should_verify_for(class_loader(), verify); |
0 | 2743 |
2744 // Set the verify flag in stream | |
2745 cfs->set_verify(_need_verify); | |
2746 | |
2747 // Save the class file name for easier error message printing. | |
2748 _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name(); | |
2749 | |
2750 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
2751 // Magic value | |
2752 u4 magic = cfs->get_u4_fast(); | |
2753 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
2754 "Incompatible magic value %u in class file %s", | |
2755 magic, CHECK_(nullHandle)); | |
2756 | |
2757 // Version numbers | |
2758 u2 minor_version = cfs->get_u2_fast(); | |
2759 u2 major_version = cfs->get_u2_fast(); | |
2760 | |
2761 // Check version numbers - we check this even with verifier off | |
2762 if (!is_supported_version(major_version, minor_version)) { | |
2763 if (name.is_null()) { | |
2764 Exceptions::fthrow( | |
2765 THREAD_AND_LOCATION, | |
2766 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2767 "Unsupported major.minor version %u.%u", | |
2768 major_version, | |
2769 minor_version); | |
2770 } else { | |
2771 ResourceMark rm(THREAD); | |
2772 Exceptions::fthrow( | |
2773 THREAD_AND_LOCATION, | |
2774 vmSymbolHandles::java_lang_UnsupportedClassVersionError(), | |
2775 "%s : Unsupported major.minor version %u.%u", | |
2776 name->as_C_string(), | |
2777 major_version, | |
2778 minor_version); | |
2779 } | |
2780 return nullHandle; | |
2781 } | |
2782 | |
2783 _major_version = major_version; | |
2784 _minor_version = minor_version; | |
2785 | |
2786 | |
2787 // Check if verification needs to be relaxed for this class file | |
2788 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
2789 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
2790 | |
2791 // Constant pool | |
2792 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
2793 int cp_size = cp->length(); | |
2794 | |
2795 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
2796 | |
2797 // Access flags | |
2798 AccessFlags access_flags; | |
2799 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
2800 | |
2801 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
2802 // Set abstract bit for old class files for backward compatibility | |
2803 flags |= JVM_ACC_ABSTRACT; | |
2804 } | |
2805 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
2806 access_flags.set_flags(flags); | |
2807 | |
2808 // This class and superclass | |
2809 instanceKlassHandle super_klass; | |
2810 u2 this_class_index = cfs->get_u2_fast(); | |
2811 check_property( | |
2812 valid_cp_range(this_class_index, cp_size) && | |
2813 cp->tag_at(this_class_index).is_unresolved_klass(), | |
2814 "Invalid this class index %u in constant pool in class file %s", | |
2815 this_class_index, CHECK_(nullHandle)); | |
2816 | |
2817 symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index)); | |
2818 assert(class_name.not_null(), "class_name can't be null"); | |
2819 | |
2820 // It's important to set parsed_name *before* resolving the super class. | |
2821 // (it's used for cleanup by the caller if parsing fails) | |
2822 parsed_name = class_name; | |
2823 | |
2824 // Update _class_name which could be null previously to be class_name | |
2825 _class_name = class_name; | |
2826 | |
2827 // Don't need to check whether this class name is legal or not. | |
2828 // It has been checked when constant pool is parsed. | |
2829 // However, make sure it is not an array type. | |
2830 if (_need_verify) { | |
2831 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
2832 "Bad class name in class file %s", | |
2833 CHECK_(nullHandle)); | |
2834 } | |
2835 | |
2836 klassOop preserve_this_klass; // for storing result across HandleMark | |
2837 | |
2838 // release all handles when parsing is done | |
2839 { HandleMark hm(THREAD); | |
2840 | |
2841 // Checks if name in class file matches requested name | |
2842 if (name.not_null() && class_name() != name()) { | |
2843 ResourceMark rm(THREAD); | |
2844 Exceptions::fthrow( | |
2845 THREAD_AND_LOCATION, | |
2846 vmSymbolHandles::java_lang_NoClassDefFoundError(), | |
2847 "%s (wrong name: %s)", | |
2848 name->as_C_string(), | |
2849 class_name->as_C_string() | |
2850 ); | |
2851 return nullHandle; | |
2852 } | |
2853 | |
2854 if (TraceClassLoadingPreorder) { | |
2855 tty->print("[Loading %s", name()->as_klass_external_name()); | |
2856 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); | |
2857 tty->print_cr("]"); | |
2858 } | |
2859 | |
2860 u2 super_class_index = cfs->get_u2_fast(); | |
2861 if (super_class_index == 0) { | |
2862 check_property(class_name() == vmSymbols::java_lang_Object(), | |
2863 "Invalid superclass index %u in class file %s", | |
2864 super_class_index, | |
2865 CHECK_(nullHandle)); | |
2866 } else { | |
2867 check_property(valid_cp_range(super_class_index, cp_size) && | |
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2868 is_klass_reference(cp, super_class_index), |
0 | 2869 "Invalid superclass index %u in class file %s", |
2870 super_class_index, | |
2871 CHECK_(nullHandle)); | |
2872 // The class name should be legal because it is checked when parsing constant pool. | |
2873 // However, make sure it is not an array type. | |
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2874 bool is_array = false; |
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2875 if (cp->tag_at(super_class_index).is_klass()) { |
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2876 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
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2877 if (_need_verify) |
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2878 is_array = super_klass->oop_is_array(); |
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2879 } else if (_need_verify) { |
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2880 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
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2881 } |
0 | 2882 if (_need_verify) { |
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2883 guarantee_property(!is_array, |
0 | 2884 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
2885 } | |
2886 } | |
2887 | |
2888 // Interfaces | |
2889 u2 itfs_len = cfs->get_u2_fast(); | |
2890 objArrayHandle local_interfaces; | |
2891 if (itfs_len == 0) { | |
2892 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
2893 } else { | |
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2894 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle)); |
0 | 2895 } |
2896 | |
2897 // Fields (offsets are filled in later) | |
2898 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
2899 objArrayHandle fields_annotations; | |
2900 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
2901 // Methods | |
2902 bool has_final_method = false; | |
2903 AccessFlags promoted_flags; | |
2904 promoted_flags.set_flags(0); | |
2905 // These need to be oop pointers because they are allocated lazily | |
2906 // inside parse_methods inside a nested HandleMark | |
2907 objArrayOop methods_annotations_oop = NULL; | |
2908 objArrayOop methods_parameter_annotations_oop = NULL; | |
2909 objArrayOop methods_default_annotations_oop = NULL; | |
2910 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
2911 &promoted_flags, | |
2912 &has_final_method, | |
2913 &methods_annotations_oop, | |
2914 &methods_parameter_annotations_oop, | |
2915 &methods_default_annotations_oop, | |
2916 CHECK_(nullHandle)); | |
2917 | |
2918 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
2919 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
2920 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
2921 | |
2922 // We check super class after class file is parsed and format is checked | |
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2923 if (super_class_index > 0 && super_klass.is_null()) { |
0 | 2924 symbolHandle sk (THREAD, cp->klass_name_at(super_class_index)); |
2925 if (access_flags.is_interface()) { | |
2926 // Before attempting to resolve the superclass, check for class format | |
2927 // errors not checked yet. | |
2928 guarantee_property(sk() == vmSymbols::java_lang_Object(), | |
2929 "Interfaces must have java.lang.Object as superclass in class file %s", | |
2930 CHECK_(nullHandle)); | |
2931 } | |
2932 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
2933 sk, | |
2934 class_loader, | |
2935 protection_domain, | |
2936 true, | |
2937 CHECK_(nullHandle)); | |
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2938 |
0 | 2939 KlassHandle kh (THREAD, k); |
2940 super_klass = instanceKlassHandle(THREAD, kh()); | |
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2941 if (LinkWellKnownClasses) // my super class is well known to me |
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2942 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
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2943 } |
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2944 if (super_klass.not_null()) { |
0 | 2945 if (super_klass->is_interface()) { |
2946 ResourceMark rm(THREAD); | |
2947 Exceptions::fthrow( | |
2948 THREAD_AND_LOCATION, | |
2949 vmSymbolHandles::java_lang_IncompatibleClassChangeError(), | |
2950 "class %s has interface %s as super class", | |
2951 class_name->as_klass_external_name(), | |
2952 super_klass->external_name() | |
2953 ); | |
2954 return nullHandle; | |
2955 } | |
2956 // Make sure super class is not final | |
2957 if (super_klass->is_final()) { | |
2958 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
2959 } | |
2960 } | |
2961 | |
2962 // Compute the transitive list of all unique interfaces implemented by this class | |
2963 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
2964 | |
2965 // sort methods | |
2966 typeArrayHandle method_ordering = sort_methods(methods, | |
2967 methods_annotations, | |
2968 methods_parameter_annotations, | |
2969 methods_default_annotations, | |
2970 CHECK_(nullHandle)); | |
2971 | |
2972 // promote flags from parse_methods() to the klass' flags | |
2973 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
2974 | |
2975 // Size of Java vtable (in words) | |
2976 int vtable_size = 0; | |
2977 int itable_size = 0; | |
2978 int num_miranda_methods = 0; | |
2979 | |
2980 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
2981 num_miranda_methods, | |
2982 super_klass(), | |
2983 methods(), | |
2984 access_flags, | |
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2985 class_loader, |
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2986 class_name, |
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2987 local_interfaces(), |
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2988 CHECK_(nullHandle)); |
0 | 2989 |
2990 // Size of Java itable (in words) | |
2991 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
2992 | |
2993 // Field size and offset computation | |
2994 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
2995 #ifndef PRODUCT | |
2996 int orig_nonstatic_field_size = 0; | |
2997 #endif | |
2998 int static_field_size = 0; | |
2999 int next_static_oop_offset; | |
3000 int next_static_double_offset; | |
3001 int next_static_word_offset; | |
3002 int next_static_short_offset; | |
3003 int next_static_byte_offset; | |
3004 int next_static_type_offset; | |
3005 int next_nonstatic_oop_offset; | |
3006 int next_nonstatic_double_offset; | |
3007 int next_nonstatic_word_offset; | |
3008 int next_nonstatic_short_offset; | |
3009 int next_nonstatic_byte_offset; | |
3010 int next_nonstatic_type_offset; | |
3011 int first_nonstatic_oop_offset; | |
3012 int first_nonstatic_field_offset; | |
3013 int next_nonstatic_field_offset; | |
3014 | |
3015 // Calculate the starting byte offsets | |
3016 next_static_oop_offset = (instanceKlass::header_size() + | |
3017 align_object_offset(vtable_size) + | |
3018 align_object_offset(itable_size)) * wordSize; | |
3019 next_static_double_offset = next_static_oop_offset + | |
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3020 (fac.static_oop_count * heapOopSize); |
0 | 3021 if ( fac.static_double_count && |
3022 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
3023 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
3024 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
3025 } | |
3026 | |
3027 next_static_word_offset = next_static_double_offset + | |
3028 (fac.static_double_count * BytesPerLong); | |
3029 next_static_short_offset = next_static_word_offset + | |
3030 (fac.static_word_count * BytesPerInt); | |
3031 next_static_byte_offset = next_static_short_offset + | |
3032 (fac.static_short_count * BytesPerShort); | |
3033 next_static_type_offset = align_size_up((next_static_byte_offset + | |
3034 fac.static_byte_count ), wordSize ); | |
3035 static_field_size = (next_static_type_offset - | |
3036 next_static_oop_offset) / wordSize; | |
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3037 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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3038 nonstatic_field_size * heapOopSize; |
0 | 3039 next_nonstatic_field_offset = first_nonstatic_field_offset; |
3040 | |
3041 // Add fake fields for java.lang.Class instances (also see below) | |
3042 if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
3043 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); | |
3044 } | |
3045 | |
710 | 3046 // adjust the vmentry field declaration in java.dyn.MethodHandle |
3047 if (EnableMethodHandles && class_name() == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) { | |
3048 java_dyn_MethodHandle_fix_pre(cp, &fields, &fac, CHECK_(nullHandle)); | |
3049 } | |
3050 | |
0 | 3051 // Add a fake "discovered" field if it is not present |
3052 // for compatibility with earlier jdk's. | |
3053 if (class_name() == vmSymbols::java_lang_ref_Reference() | |
3054 && class_loader.is_null()) { | |
3055 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
3056 } | |
3057 // end of "discovered" field compactibility fix | |
3058 | |
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3059 unsigned int nonstatic_double_count = fac.nonstatic_double_count; |
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3060 unsigned int nonstatic_word_count = fac.nonstatic_word_count; |
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3061 unsigned int nonstatic_short_count = fac.nonstatic_short_count; |
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3062 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count; |
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3063 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count; |
0 | 3064 |
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3065 bool super_has_nonstatic_fields = |
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3066 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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3067 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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3068 ((nonstatic_double_count + nonstatic_word_count + |
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3069 nonstatic_short_count + nonstatic_byte_count + |
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3070 nonstatic_oop_count) != 0); |
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3071 |
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3072 |
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3073 // Prepare list of oops for oop map generation. |
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3074 int* nonstatic_oop_offsets; |
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3075 unsigned int* nonstatic_oop_counts; |
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3076 unsigned int nonstatic_oop_map_count = 0; |
0 | 3077 |
3078 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
939
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3079 THREAD, int, nonstatic_oop_count + 1); |
938 | 3080 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( |
939
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3081 THREAD, unsigned int, nonstatic_oop_count + 1); |
0 | 3082 |
3083 // Add fake fields for java.lang.Class instances (also see above). | |
3084 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
3085 if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) { | |
3086 java_lang_Class_fix_post(&next_nonstatic_field_offset); | |
939
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3087 nonstatic_oop_offsets[0] = first_nonstatic_field_offset; |
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3088 const uint fake_oop_count = (next_nonstatic_field_offset - |
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3089 first_nonstatic_field_offset) / heapOopSize; |
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3090 nonstatic_oop_counts[0] = fake_oop_count; |
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3091 nonstatic_oop_map_count = 1; |
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3092 nonstatic_oop_count -= fake_oop_count; |
0 | 3093 first_nonstatic_oop_offset = first_nonstatic_field_offset; |
3094 } else { | |
3095 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
3096 } | |
3097 | |
3098 #ifndef PRODUCT | |
3099 if( PrintCompactFieldsSavings ) { | |
3100 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
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3101 (nonstatic_oop_count * heapOopSize); |
0 | 3102 if ( nonstatic_double_count > 0 ) { |
3103 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
3104 } | |
3105 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
3106 (nonstatic_double_count * BytesPerLong); | |
3107 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
3108 (nonstatic_word_count * BytesPerInt); | |
3109 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
3110 (nonstatic_short_count * BytesPerShort); | |
3111 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
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3112 nonstatic_byte_count ), heapOopSize ); |
0 | 3113 orig_nonstatic_field_size = nonstatic_field_size + |
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3114 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
0 | 3115 } |
3116 #endif | |
3117 bool compact_fields = CompactFields; | |
3118 int allocation_style = FieldsAllocationStyle; | |
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3119 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? |
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3120 assert(false, "0 <= FieldsAllocationStyle <= 2"); |
0 | 3121 allocation_style = 1; // Optimistic |
3122 } | |
3123 | |
3124 // The next classes have predefined hard-coded fields offsets | |
3125 // (see in JavaClasses::compute_hard_coded_offsets()). | |
3126 // Use default fields allocation order for them. | |
3127 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
3128 (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() || | |
3129 class_name() == vmSymbols::java_lang_Class() || | |
3130 class_name() == vmSymbols::java_lang_ClassLoader() || | |
3131 class_name() == vmSymbols::java_lang_ref_Reference() || | |
3132 class_name() == vmSymbols::java_lang_ref_SoftReference() || | |
3133 class_name() == vmSymbols::java_lang_StackTraceElement() || | |
3134 class_name() == vmSymbols::java_lang_String() || | |
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3135 class_name() == vmSymbols::java_lang_Throwable() || |
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3136 class_name() == vmSymbols::java_lang_Boolean() || |
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3137 class_name() == vmSymbols::java_lang_Character() || |
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3138 class_name() == vmSymbols::java_lang_Float() || |
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3139 class_name() == vmSymbols::java_lang_Double() || |
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3140 class_name() == vmSymbols::java_lang_Byte() || |
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3141 class_name() == vmSymbols::java_lang_Short() || |
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3142 class_name() == vmSymbols::java_lang_Integer() || |
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3143 class_name() == vmSymbols::java_lang_Long())) { |
0 | 3144 allocation_style = 0; // Allocate oops first |
3145 compact_fields = false; // Don't compact fields | |
3146 } | |
3147 | |
3148 if( allocation_style == 0 ) { | |
3149 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
3150 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
3151 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
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3152 (nonstatic_oop_count * heapOopSize); |
0 | 3153 } else if( allocation_style == 1 ) { |
3154 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
3155 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
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3156 } else if( allocation_style == 2 ) { |
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3157 // Fields allocation: oops fields in super and sub classes are together. |
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3158 if( nonstatic_field_size > 0 && super_klass() != NULL && |
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3159 super_klass->nonstatic_oop_map_size() > 0 ) { |
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3160 int map_size = super_klass->nonstatic_oop_map_size(); |
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3161 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps(); |
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3162 OopMapBlock* last_map = first_map + map_size - 1; |
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3163 int next_offset = last_map->offset() + (last_map->count() * heapOopSize); |
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3164 if (next_offset == next_nonstatic_field_offset) { |
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3165 allocation_style = 0; // allocate oops first |
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3166 next_nonstatic_oop_offset = next_nonstatic_field_offset; |
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3167 next_nonstatic_double_offset = next_nonstatic_oop_offset + |
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3168 (nonstatic_oop_count * heapOopSize); |
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3169 } |
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3170 } |
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3171 if( allocation_style == 2 ) { |
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3172 allocation_style = 1; // allocate oops last |
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3173 next_nonstatic_double_offset = next_nonstatic_field_offset; |
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3174 } |
0 | 3175 } else { |
3176 ShouldNotReachHere(); | |
3177 } | |
3178 | |
3179 int nonstatic_oop_space_count = 0; | |
3180 int nonstatic_word_space_count = 0; | |
3181 int nonstatic_short_space_count = 0; | |
3182 int nonstatic_byte_space_count = 0; | |
3183 int nonstatic_oop_space_offset; | |
3184 int nonstatic_word_space_offset; | |
3185 int nonstatic_short_space_offset; | |
3186 int nonstatic_byte_space_offset; | |
3187 | |
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3188 if( nonstatic_double_count > 0 ) { |
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3189 int offset = next_nonstatic_double_offset; |
0 | 3190 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
3191 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
3192 // Allocate available fields into the gap before double field. | |
3193 int length = next_nonstatic_double_offset - offset; | |
3194 assert(length == BytesPerInt, ""); | |
3195 nonstatic_word_space_offset = offset; | |
3196 if( nonstatic_word_count > 0 ) { | |
3197 nonstatic_word_count -= 1; | |
3198 nonstatic_word_space_count = 1; // Only one will fit | |
3199 length -= BytesPerInt; | |
3200 offset += BytesPerInt; | |
3201 } | |
3202 nonstatic_short_space_offset = offset; | |
3203 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
3204 nonstatic_short_count -= 1; | |
3205 nonstatic_short_space_count += 1; | |
3206 length -= BytesPerShort; | |
3207 offset += BytesPerShort; | |
3208 } | |
3209 nonstatic_byte_space_offset = offset; | |
3210 while( length > 0 && nonstatic_byte_count > 0 ) { | |
3211 nonstatic_byte_count -= 1; | |
3212 nonstatic_byte_space_count += 1; | |
3213 length -= 1; | |
3214 } | |
3215 // Allocate oop field in the gap if there are no other fields for that. | |
3216 nonstatic_oop_space_offset = offset; | |
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3217 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
0 | 3218 allocation_style != 0 ) { // when oop fields not first |
3219 nonstatic_oop_count -= 1; | |
3220 nonstatic_oop_space_count = 1; // Only one will fit | |
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3221 length -= heapOopSize; |
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3222 offset += heapOopSize; |
0 | 3223 } |
3224 } | |
3225 } | |
3226 | |
3227 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
3228 (nonstatic_double_count * BytesPerLong); | |
3229 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
3230 (nonstatic_word_count * BytesPerInt); | |
3231 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
3232 (nonstatic_short_count * BytesPerShort); | |
3233 | |
3234 int notaligned_offset; | |
3235 if( allocation_style == 0 ) { | |
3236 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
3237 } else { // allocation_style == 1 | |
3238 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
3239 if( nonstatic_oop_count > 0 ) { | |
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3240 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
0 | 3241 } |
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3242 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
0 | 3243 } |
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3244 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
0 | 3245 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
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3246 - first_nonstatic_field_offset)/heapOopSize); |
0 | 3247 |
3248 // Iterate over fields again and compute correct offsets. | |
3249 // The field allocation type was temporarily stored in the offset slot. | |
3250 // oop fields are located before non-oop fields (static and non-static). | |
3251 int len = fields->length(); | |
3252 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
3253 int real_offset; | |
1108 | 3254 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset); |
0 | 3255 switch (atype) { |
3256 case STATIC_OOP: | |
3257 real_offset = next_static_oop_offset; | |
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3258 next_static_oop_offset += heapOopSize; |
0 | 3259 break; |
3260 case STATIC_BYTE: | |
3261 real_offset = next_static_byte_offset; | |
3262 next_static_byte_offset += 1; | |
3263 break; | |
3264 case STATIC_SHORT: | |
3265 real_offset = next_static_short_offset; | |
3266 next_static_short_offset += BytesPerShort; | |
3267 break; | |
3268 case STATIC_WORD: | |
3269 real_offset = next_static_word_offset; | |
3270 next_static_word_offset += BytesPerInt; | |
3271 break; | |
3272 case STATIC_ALIGNED_DOUBLE: | |
3273 case STATIC_DOUBLE: | |
3274 real_offset = next_static_double_offset; | |
3275 next_static_double_offset += BytesPerLong; | |
3276 break; | |
3277 case NONSTATIC_OOP: | |
3278 if( nonstatic_oop_space_count > 0 ) { | |
3279 real_offset = nonstatic_oop_space_offset; | |
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3280 nonstatic_oop_space_offset += heapOopSize; |
0 | 3281 nonstatic_oop_space_count -= 1; |
3282 } else { | |
3283 real_offset = next_nonstatic_oop_offset; | |
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3284 next_nonstatic_oop_offset += heapOopSize; |
0 | 3285 } |
3286 // Update oop maps | |
3287 if( nonstatic_oop_map_count > 0 && | |
3288 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
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3289 real_offset - |
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3290 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * |
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3291 heapOopSize ) { |
0 | 3292 // Extend current oop map |
938 | 3293 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; |
0 | 3294 } else { |
3295 // Create new oop map | |
939
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3296 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; |
938 | 3297 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; |
0 | 3298 nonstatic_oop_map_count += 1; |
3299 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
3300 first_nonstatic_oop_offset = real_offset; | |
3301 } | |
3302 } | |
3303 break; | |
3304 case NONSTATIC_BYTE: | |
3305 if( nonstatic_byte_space_count > 0 ) { | |
3306 real_offset = nonstatic_byte_space_offset; | |
3307 nonstatic_byte_space_offset += 1; | |
3308 nonstatic_byte_space_count -= 1; | |
3309 } else { | |
3310 real_offset = next_nonstatic_byte_offset; | |
3311 next_nonstatic_byte_offset += 1; | |
3312 } | |
3313 break; | |
3314 case NONSTATIC_SHORT: | |
3315 if( nonstatic_short_space_count > 0 ) { | |
3316 real_offset = nonstatic_short_space_offset; | |
3317 nonstatic_short_space_offset += BytesPerShort; | |
3318 nonstatic_short_space_count -= 1; | |
3319 } else { | |
3320 real_offset = next_nonstatic_short_offset; | |
3321 next_nonstatic_short_offset += BytesPerShort; | |
3322 } | |
3323 break; | |
3324 case NONSTATIC_WORD: | |
3325 if( nonstatic_word_space_count > 0 ) { | |
3326 real_offset = nonstatic_word_space_offset; | |
3327 nonstatic_word_space_offset += BytesPerInt; | |
3328 nonstatic_word_space_count -= 1; | |
3329 } else { | |
3330 real_offset = next_nonstatic_word_offset; | |
3331 next_nonstatic_word_offset += BytesPerInt; | |
3332 } | |
3333 break; | |
3334 case NONSTATIC_ALIGNED_DOUBLE: | |
3335 case NONSTATIC_DOUBLE: | |
3336 real_offset = next_nonstatic_double_offset; | |
3337 next_nonstatic_double_offset += BytesPerLong; | |
3338 break; | |
3339 default: | |
3340 ShouldNotReachHere(); | |
3341 } | |
1108 | 3342 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset)); |
3343 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset)); | |
0 | 3344 } |
3345 | |
3346 // Size of instances | |
3347 int instance_size; | |
3348 | |
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3349 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
0 | 3350 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
3351 | |
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3352 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 | 3353 |
938 | 3354 // Number of non-static oop map blocks allocated at end of klass. |
939
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3355 const unsigned int total_oop_map_count = |
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3356 compute_oop_map_count(super_klass, nonstatic_oop_map_count, |
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3357 first_nonstatic_oop_offset); |
0 | 3358 |
3359 // Compute reference type | |
3360 ReferenceType rt; | |
3361 if (super_klass() == NULL) { | |
3362 rt = REF_NONE; | |
3363 } else { | |
3364 rt = super_klass->reference_type(); | |
3365 } | |
3366 | |
3367 // We can now create the basic klassOop for this klass | |
939
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3368 klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size, |
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3369 static_field_size, |
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3370 total_oop_map_count, |
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3371 rt, CHECK_(nullHandle)); |
0 | 3372 instanceKlassHandle this_klass (THREAD, ik); |
3373 | |
938 | 3374 assert(this_klass->static_field_size() == static_field_size, "sanity"); |
3375 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count, | |
3376 "sanity"); | |
0 | 3377 |
3378 // Fill in information already parsed | |
3379 this_klass->set_access_flags(access_flags); | |
975 | 3380 this_klass->set_should_verify_class(verify); |
0 | 3381 jint lh = Klass::instance_layout_helper(instance_size, false); |
3382 this_klass->set_layout_helper(lh); | |
3383 assert(this_klass->oop_is_instance(), "layout is correct"); | |
3384 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
3385 // Not yet: supers are done below to support the new subtype-checking fields | |
3386 //this_klass->set_super(super_klass()); | |
3387 this_klass->set_class_loader(class_loader()); | |
3388 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
975 | 3389 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
0 | 3390 this_klass->set_static_oop_field_size(fac.static_oop_count); |
3391 cp->set_pool_holder(this_klass()); | |
3392 this_klass->set_constants(cp()); | |
3393 this_klass->set_local_interfaces(local_interfaces()); | |
3394 this_klass->set_fields(fields()); | |
3395 this_klass->set_methods(methods()); | |
3396 if (has_final_method) { | |
3397 this_klass->set_has_final_method(); | |
3398 } | |
3399 this_klass->set_method_ordering(method_ordering()); | |
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3400 // The instanceKlass::_methods_jmethod_ids cache and the |
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3401 // instanceKlass::_methods_cached_itable_indices cache are |
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3402 // both managed on the assumption that the initial cache |
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3403 // size is equal to the number of methods in the class. If |
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3404 // that changes, then instanceKlass::idnum_can_increment() |
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3405 // has to be changed accordingly. |
0 | 3406 this_klass->set_initial_method_idnum(methods->length()); |
3407 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
710 | 3408 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself |
474
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431
diff
changeset
|
3409 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
0 | 3410 this_klass->set_protection_domain(protection_domain()); |
3411 this_klass->set_fields_annotations(fields_annotations()); | |
3412 this_klass->set_methods_annotations(methods_annotations()); | |
3413 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
3414 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
3415 | |
3416 this_klass->set_minor_version(minor_version); | |
3417 this_klass->set_major_version(major_version); | |
3418 | |
856
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6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
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parents:
710
diff
changeset
|
3419 // Set up methodOop::intrinsic_id as soon as we know the names of methods. |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3420 // (We used to do this lazily, but now we query it in Rewriter, |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3421 // which is eagerly done for every method, so we might as well do it now, |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3422 // when everything is fresh in memory.) |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3423 if (methodOopDesc::klass_id_for_intrinsics(this_klass->as_klassOop()) != vmSymbols::NO_SID) { |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3424 for (int j = 0; j < methods->length(); j++) { |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3425 ((methodOop)methods->obj_at(j))->init_intrinsic_id(); |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3426 } |
75596850f863
6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
parents:
710
diff
changeset
|
3427 } |
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6862576: vmIntrinsics needs cleanup in order to support JSR 292 intrinsics
jrose
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710
diff
changeset
|
3428 |
0 | 3429 if (cached_class_file_bytes != NULL) { |
3430 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
3431 this_klass->set_cached_class_file(cached_class_file_bytes, | |
3432 cached_class_file_length); | |
3433 } | |
3434 | |
3435 // Miranda methods | |
3436 if ((num_miranda_methods > 0) || | |
3437 // if this class introduced new miranda methods or | |
3438 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
3439 // super class exists and this class inherited miranda methods | |
3440 ) { | |
3441 this_klass->set_has_miranda_methods(); // then set a flag | |
3442 } | |
3443 | |
3444 // Additional attributes | |
3445 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
3446 | |
3447 // Make sure this is the end of class file stream | |
3448 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
3449 | |
3450 // Initialize static fields | |
3451 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
3452 | |
3453 // VerifyOops believes that once this has been set, the object is completely loaded. | |
3454 // Compute transitive closure of interfaces this class implements | |
3455 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
3456 | |
3457 // Fill in information needed to compute superclasses. | |
3458 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
3459 | |
3460 // Initialize itable offset tables | |
3461 klassItable::setup_itable_offset_table(this_klass); | |
3462 | |
3463 // Do final class setup | |
938 | 3464 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts); |
0 | 3465 |
3466 set_precomputed_flags(this_klass); | |
3467 | |
3468 // reinitialize modifiers, using the InnerClasses attribute | |
3469 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
3470 this_klass->set_modifier_flags(computed_modifiers); | |
3471 | |
3472 // check if this class can access its super class | |
3473 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
3474 | |
3475 // check if this class can access its superinterfaces | |
3476 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
3477 | |
3478 // check if this class overrides any final method | |
3479 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
3480 | |
3481 // check that if this class is an interface then it doesn't have static methods | |
3482 if (this_klass->is_interface()) { | |
3483 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
3484 } | |
3485 | |
3486 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
3487 false /* not shared class */); | |
3488 | |
3489 if (TraceClassLoading) { | |
3490 // print in a single call to reduce interleaving of output | |
3491 if (cfs->source() != NULL) { | |
3492 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3493 cfs->source()); | |
3494 } else if (class_loader.is_null()) { | |
3495 if (THREAD->is_Java_thread()) { | |
3496 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
3497 tty->print("[Loaded %s by instance of %s]\n", | |
3498 this_klass->external_name(), | |
3499 instanceKlass::cast(caller)->external_name()); | |
3500 } else { | |
3501 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
3502 } | |
3503 } else { | |
3504 ResourceMark rm; | |
3505 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
3506 instanceKlass::cast(class_loader->klass())->external_name()); | |
3507 } | |
3508 } | |
3509 | |
3510 if (TraceClassResolution) { | |
3511 // print out the superclass. | |
3512 const char * from = Klass::cast(this_klass())->external_name(); | |
3513 if (this_klass->java_super() != NULL) { | |
657
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6603316: Improve instrumentation for classes loaded at startup
acorn
parents:
652
diff
changeset
|
3514 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); |
0 | 3515 } |
3516 // print out each of the interface classes referred to by this class. | |
3517 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
3518 if (!local_interfaces.is_null()) { | |
3519 int length = local_interfaces->length(); | |
3520 for (int i = 0; i < length; i++) { | |
3521 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3522 instanceKlass* to_class = instanceKlass::cast(k); | |
3523 const char * to = to_class->external_name(); | |
657
715dceaa89b7
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acorn
parents:
652
diff
changeset
|
3524 tty->print("RESOLVE %s %s (interface)\n", from, to); |
0 | 3525 } |
3526 } | |
3527 } | |
3528 | |
3529 #ifndef PRODUCT | |
3530 if( PrintCompactFieldsSavings ) { | |
3531 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3532 tty->print("[Saved %d of %d bytes in %s]\n", |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3533 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3534 orig_nonstatic_field_size*heapOopSize, |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3535 this_klass->external_name()); |
0 | 3536 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
165
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kvn
parents:
136
diff
changeset
|
3537 tty->print("[Wasted %d over %d bytes in %s]\n", |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3538 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3539 orig_nonstatic_field_size*heapOopSize, |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
parents:
136
diff
changeset
|
3540 this_klass->external_name()); |
0 | 3541 } |
3542 } | |
3543 #endif | |
3544 | |
3545 // preserve result across HandleMark | |
3546 preserve_this_klass = this_klass(); | |
3547 } | |
3548 | |
3549 // Create new handle outside HandleMark | |
3550 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
3551 debug_only(this_klass->as_klassOop()->verify();) | |
3552 | |
3553 return this_klass; | |
3554 } | |
3555 | |
3556 | |
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3557 unsigned int |
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3558 ClassFileParser::compute_oop_map_count(instanceKlassHandle super, |
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3559 unsigned int nonstatic_oop_map_count, |
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3560 int first_nonstatic_oop_offset) { |
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3561 unsigned int map_count = |
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3562 super.is_null() ? 0 : super->nonstatic_oop_map_count(); |
0 | 3563 if (nonstatic_oop_map_count > 0) { |
3564 // We have oops to add to map | |
938 | 3565 if (map_count == 0) { |
3566 map_count = nonstatic_oop_map_count; | |
0 | 3567 } else { |
938 | 3568 // Check whether we should add a new map block or whether the last one can |
3569 // be extended | |
3570 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); | |
3571 OopMapBlock* const last_map = first_map + map_count - 1; | |
3572 | |
3573 int next_offset = last_map->offset() + last_map->count() * heapOopSize; | |
0 | 3574 if (next_offset == first_nonstatic_oop_offset) { |
3575 // There is no gap bettwen superklass's last oop field and first | |
3576 // local oop field, merge maps. | |
3577 nonstatic_oop_map_count -= 1; | |
3578 } else { | |
3579 // Superklass didn't end with a oop field, add extra maps | |
938 | 3580 assert(next_offset < first_nonstatic_oop_offset, "just checking"); |
0 | 3581 } |
938 | 3582 map_count += nonstatic_oop_map_count; |
0 | 3583 } |
3584 } | |
938 | 3585 return map_count; |
0 | 3586 } |
3587 | |
3588 | |
3589 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3590 unsigned int nonstatic_oop_map_count, |
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3591 int* nonstatic_oop_offsets, |
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3592 unsigned int* nonstatic_oop_counts) { |
0 | 3593 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); |
938 | 3594 const instanceKlass* const super = k->superklass(); |
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3595 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; |
938 | 3596 if (super_count > 0) { |
3597 // Copy maps from superklass | |
0 | 3598 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); |
939
9eebd3ac74cf
6845368: large objects cause a crash or unexpected exception
jcoomes
parents:
938
diff
changeset
|
3599 for (unsigned int i = 0; i < super_count; ++i) { |
0 | 3600 *this_oop_map++ = *super_oop_map++; |
3601 } | |
3602 } | |
938 | 3603 |
0 | 3604 if (nonstatic_oop_map_count > 0) { |
938 | 3605 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { |
3606 // The counts differ because there is no gap between superklass's last oop | |
3607 // field and the first local oop field. Extend the last oop map copied | |
0 | 3608 // from the superklass instead of creating new one. |
3609 nonstatic_oop_map_count--; | |
3610 nonstatic_oop_offsets++; | |
3611 this_oop_map--; | |
938 | 3612 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); |
0 | 3613 this_oop_map++; |
3614 } | |
938 | 3615 |
0 | 3616 // Add new map blocks, fill them |
3617 while (nonstatic_oop_map_count-- > 0) { | |
3618 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
938 | 3619 this_oop_map->set_count(*nonstatic_oop_counts++); |
0 | 3620 this_oop_map++; |
3621 } | |
938 | 3622 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == |
3623 this_oop_map, "sanity"); | |
0 | 3624 } |
3625 } | |
3626 | |
3627 | |
3628 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
3629 klassOop super = k->super(); | |
3630 | |
3631 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
3632 // in which case we don't have to register objects as finalizable | |
3633 if (!_has_empty_finalizer) { | |
3634 if (_has_finalizer || | |
3635 (super != NULL && super->klass_part()->has_finalizer())) { | |
3636 k->set_has_finalizer(); | |
3637 } | |
3638 } | |
3639 | |
3640 #ifdef ASSERT | |
3641 bool f = false; | |
3642 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
3643 vmSymbols::void_method_signature()); | |
3644 if (m != NULL && !m->is_empty_method()) { | |
3645 f = true; | |
3646 } | |
3647 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
3648 #endif | |
3649 | |
3650 // Check if this klass supports the java.lang.Cloneable interface | |
1142 | 3651 if (SystemDictionary::Cloneable_klass_loaded()) { |
3652 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) { | |
0 | 3653 k->set_is_cloneable(); |
3654 } | |
3655 } | |
3656 | |
3657 // Check if this klass has a vanilla default constructor | |
3658 if (super == NULL) { | |
3659 // java.lang.Object has empty default constructor | |
3660 k->set_has_vanilla_constructor(); | |
3661 } else { | |
3662 if (Klass::cast(super)->has_vanilla_constructor() && | |
3663 _has_vanilla_constructor) { | |
3664 k->set_has_vanilla_constructor(); | |
3665 } | |
3666 #ifdef ASSERT | |
3667 bool v = false; | |
3668 if (Klass::cast(super)->has_vanilla_constructor()) { | |
3669 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
3670 ), vmSymbols::void_method_signature()); | |
3671 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
3672 v = true; | |
3673 } | |
3674 } | |
3675 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
3676 #endif | |
3677 } | |
3678 | |
3679 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
3680 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
3681 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
3682 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
3683 || k->is_abstract() || k->is_interface() | |
3684 || (k->name() == vmSymbols::java_lang_Class() | |
3685 && k->class_loader() == NULL) | |
3686 || k->size_helper() >= FastAllocateSizeLimit) { | |
3687 // Forbid fast-path allocation. | |
3688 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
3689 k->set_layout_helper(lh); | |
3690 } | |
3691 } | |
3692 | |
3693 | |
3694 // utility method for appending and array with check for duplicates | |
3695 | |
3696 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
3697 // iterate over new interfaces | |
3698 for (int i = 0; i < ifs->length(); i++) { | |
3699 oop e = ifs->obj_at(i); | |
3700 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
3701 // check for duplicates | |
3702 bool duplicate = false; | |
3703 for (int j = 0; j < index; j++) { | |
3704 if (result->obj_at(j) == e) { | |
3705 duplicate = true; | |
3706 break; | |
3707 } | |
3708 } | |
3709 // add new interface | |
3710 if (!duplicate) { | |
3711 result->obj_at_put(index++, e); | |
3712 } | |
3713 } | |
3714 } | |
3715 | |
3716 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
3717 // Compute maximum size for transitive interfaces | |
3718 int max_transitive_size = 0; | |
3719 int super_size = 0; | |
3720 // Add superclass transitive interfaces size | |
3721 if (super.not_null()) { | |
3722 super_size = super->transitive_interfaces()->length(); | |
3723 max_transitive_size += super_size; | |
3724 } | |
3725 // Add local interfaces' super interfaces | |
3726 int local_size = local_ifs->length(); | |
3727 for (int i = 0; i < local_size; i++) { | |
3728 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3729 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
3730 } | |
3731 // Finally add local interfaces | |
3732 max_transitive_size += local_size; | |
3733 // Construct array | |
3734 objArrayHandle result; | |
3735 if (max_transitive_size == 0) { | |
3736 // no interfaces, use canonicalized array | |
3737 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
3738 } else if (max_transitive_size == super_size) { | |
3739 // no new local interfaces added, share superklass' transitive interface array | |
3740 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
3741 } else if (max_transitive_size == local_size) { | |
3742 // only local interfaces added, share local interface array | |
3743 result = local_ifs; | |
3744 } else { | |
3745 objArrayHandle nullHandle; | |
3746 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
3747 result = objArrayHandle(THREAD, new_objarray); | |
3748 int index = 0; | |
3749 // Copy down from superclass | |
3750 if (super.not_null()) { | |
3751 append_interfaces(result, index, super->transitive_interfaces()); | |
3752 } | |
3753 // Copy down from local interfaces' superinterfaces | |
3754 for (int i = 0; i < local_ifs->length(); i++) { | |
3755 klassOop l = klassOop(local_ifs->obj_at(i)); | |
3756 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
3757 } | |
3758 // Finally add local interfaces | |
3759 append_interfaces(result, index, local_ifs()); | |
3760 | |
3761 // Check if duplicates were removed | |
3762 if (index != max_transitive_size) { | |
3763 assert(index < max_transitive_size, "just checking"); | |
3764 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
3765 for (int i = 0; i < index; i++) { | |
3766 oop e = result->obj_at(i); | |
3767 assert(e != NULL, "just checking"); | |
3768 new_result->obj_at_put(i, e); | |
3769 } | |
3770 result = objArrayHandle(THREAD, new_result); | |
3771 } | |
3772 } | |
3773 return result; | |
3774 } | |
3775 | |
3776 | |
3777 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
3778 klassOop super = this_klass->super(); | |
3779 if ((super != NULL) && | |
3780 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
3781 ResourceMark rm(THREAD); | |
3782 Exceptions::fthrow( | |
3783 THREAD_AND_LOCATION, | |
3784 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3785 "class %s cannot access its superclass %s", | |
3786 this_klass->external_name(), | |
3787 instanceKlass::cast(super)->external_name() | |
3788 ); | |
3789 return; | |
3790 } | |
3791 } | |
3792 | |
3793 | |
3794 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
3795 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
3796 int lng = local_interfaces->length(); | |
3797 for (int i = lng - 1; i >= 0; i--) { | |
3798 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
3799 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
3800 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
3801 ResourceMark rm(THREAD); | |
3802 Exceptions::fthrow( | |
3803 THREAD_AND_LOCATION, | |
3804 vmSymbolHandles::java_lang_IllegalAccessError(), | |
3805 "class %s cannot access its superinterface %s", | |
3806 this_klass->external_name(), | |
3807 instanceKlass::cast(k)->external_name() | |
3808 ); | |
3809 return; | |
3810 } | |
3811 } | |
3812 } | |
3813 | |
3814 | |
3815 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
3816 objArrayHandle methods (THREAD, this_klass->methods()); | |
3817 int num_methods = methods->length(); | |
3818 | |
3819 // go thru each method and check if it overrides a final method | |
3820 for (int index = 0; index < num_methods; index++) { | |
3821 methodOop m = (methodOop)methods->obj_at(index); | |
3822 | |
3823 // skip private, static and <init> methods | |
3824 if ((!m->is_private()) && | |
3825 (!m->is_static()) && | |
3826 (m->name() != vmSymbols::object_initializer_name())) { | |
3827 | |
3828 symbolOop name = m->name(); | |
3829 symbolOop signature = m->signature(); | |
3830 klassOop k = this_klass->super(); | |
3831 methodOop super_m = NULL; | |
3832 while (k != NULL) { | |
3833 // skip supers that don't have final methods. | |
3834 if (k->klass_part()->has_final_method()) { | |
3835 // lookup a matching method in the super class hierarchy | |
3836 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
3837 if (super_m == NULL) { | |
3838 break; // didn't find any match; get out | |
3839 } | |
3840 | |
3841 if (super_m->is_final() && | |
3842 // matching method in super is final | |
3843 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
3844 super_m->method_holder(), | |
3845 super_m->method_holder(), | |
3846 super_m->access_flags(), false)) | |
3847 // this class can access super final method and therefore override | |
3848 ) { | |
3849 ResourceMark rm(THREAD); | |
3850 Exceptions::fthrow( | |
3851 THREAD_AND_LOCATION, | |
3852 vmSymbolHandles::java_lang_VerifyError(), | |
3853 "class %s overrides final method %s.%s", | |
3854 this_klass->external_name(), | |
3855 name->as_C_string(), | |
3856 signature->as_C_string() | |
3857 ); | |
3858 return; | |
3859 } | |
3860 | |
3861 // continue to look from super_m's holder's super. | |
3862 k = instanceKlass::cast(super_m->method_holder())->super(); | |
3863 continue; | |
3864 } | |
3865 | |
3866 k = k->klass_part()->super(); | |
3867 } | |
3868 } | |
3869 } | |
3870 } | |
3871 | |
3872 | |
3873 // assumes that this_klass is an interface | |
3874 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
3875 assert(this_klass->is_interface(), "not an interface"); | |
3876 objArrayHandle methods (THREAD, this_klass->methods()); | |
3877 int num_methods = methods->length(); | |
3878 | |
3879 for (int index = 0; index < num_methods; index++) { | |
3880 methodOop m = (methodOop)methods->obj_at(index); | |
3881 // if m is static and not the init method, throw a verify error | |
3882 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
3883 ResourceMark rm(THREAD); | |
3884 Exceptions::fthrow( | |
3885 THREAD_AND_LOCATION, | |
3886 vmSymbolHandles::java_lang_VerifyError(), | |
3887 "Illegal static method %s in interface %s", | |
3888 m->name()->as_C_string(), | |
3889 this_klass->external_name() | |
3890 ); | |
3891 return; | |
3892 } | |
3893 } | |
3894 } | |
3895 | |
3896 // utility methods for format checking | |
3897 | |
3898 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
3899 if (!_need_verify) { return; } | |
3900 | |
3901 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
3902 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3903 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3904 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
3905 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3906 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
3907 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3908 | |
3909 if ((is_abstract && is_final) || | |
3910 (is_interface && !is_abstract) || | |
3911 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
3912 (!is_interface && major_gte_15 && is_annotation)) { | |
3913 ResourceMark rm(THREAD); | |
3914 Exceptions::fthrow( | |
3915 THREAD_AND_LOCATION, | |
3916 vmSymbolHandles::java_lang_ClassFormatError(), | |
3917 "Illegal class modifiers in class %s: 0x%X", | |
3918 _class_name->as_C_string(), flags | |
3919 ); | |
3920 return; | |
3921 } | |
3922 } | |
3923 | |
3924 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
3925 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3926 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3927 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3928 | |
3929 return ((is_public && is_protected) || | |
3930 (is_public && is_private) || | |
3931 (is_protected && is_private)); | |
3932 } | |
3933 | |
3934 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
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2e8bdfdd3ba2
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977
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changeset
|
3935 u2 max_version = |
2e8bdfdd3ba2
6899467: System property java.class.version out-of-sync with VM for jdk 5.0 with HS 16 in nightly build
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977
diff
changeset
|
3936 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION : |
2e8bdfdd3ba2
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|
3937 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION); |
0 | 3938 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
176
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|
3939 (major <= max_version) && |
6b648fefb395
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|
3940 ((major != max_version) || |
0 | 3941 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
3942 } | |
3943 | |
3944 void ClassFileParser::verify_legal_field_modifiers( | |
3945 jint flags, bool is_interface, TRAPS) { | |
3946 if (!_need_verify) { return; } | |
3947 | |
3948 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3949 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
3950 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3951 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3952 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3953 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
3954 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
3955 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
3956 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3957 | |
3958 bool is_illegal = false; | |
3959 | |
3960 if (is_interface) { | |
3961 if (!is_public || !is_static || !is_final || is_private || | |
3962 is_protected || is_volatile || is_transient || | |
3963 (major_gte_15 && is_enum)) { | |
3964 is_illegal = true; | |
3965 } | |
3966 } else { // not interface | |
3967 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
3968 is_illegal = true; | |
3969 } | |
3970 } | |
3971 | |
3972 if (is_illegal) { | |
3973 ResourceMark rm(THREAD); | |
3974 Exceptions::fthrow( | |
3975 THREAD_AND_LOCATION, | |
3976 vmSymbolHandles::java_lang_ClassFormatError(), | |
3977 "Illegal field modifiers in class %s: 0x%X", | |
3978 _class_name->as_C_string(), flags); | |
3979 return; | |
3980 } | |
3981 } | |
3982 | |
3983 void ClassFileParser::verify_legal_method_modifiers( | |
3984 jint flags, bool is_interface, symbolHandle name, TRAPS) { | |
3985 if (!_need_verify) { return; } | |
3986 | |
3987 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
3988 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
3989 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
3990 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
3991 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
3992 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
3993 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
3994 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
3995 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
3996 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
3997 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
3998 | |
3999 bool is_illegal = false; | |
4000 | |
4001 if (is_interface) { | |
4002 if (!is_abstract || !is_public || is_static || is_final || | |
4003 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
4004 is_illegal = true; | |
4005 } | |
4006 } else { // not interface | |
4007 if (is_initializer) { | |
4008 if (is_static || is_final || is_synchronized || is_native || | |
4009 is_abstract || (major_gte_15 && is_bridge)) { | |
4010 is_illegal = true; | |
4011 } | |
4012 } else { // not initializer | |
4013 if (is_abstract) { | |
4014 if ((is_final || is_native || is_private || is_static || | |
4015 (major_gte_15 && (is_synchronized || is_strict)))) { | |
4016 is_illegal = true; | |
4017 } | |
4018 } | |
4019 if (has_illegal_visibility(flags)) { | |
4020 is_illegal = true; | |
4021 } | |
4022 } | |
4023 } | |
4024 | |
4025 if (is_illegal) { | |
4026 ResourceMark rm(THREAD); | |
4027 Exceptions::fthrow( | |
4028 THREAD_AND_LOCATION, | |
4029 vmSymbolHandles::java_lang_ClassFormatError(), | |
4030 "Method %s in class %s has illegal modifiers: 0x%X", | |
4031 name->as_C_string(), _class_name->as_C_string(), flags); | |
4032 return; | |
4033 } | |
4034 } | |
4035 | |
4036 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
4037 assert(_need_verify, "only called when _need_verify is true"); | |
4038 int i = 0; | |
4039 int count = length >> 2; | |
4040 for (int k=0; k<count; k++) { | |
4041 unsigned char b0 = buffer[i]; | |
4042 unsigned char b1 = buffer[i+1]; | |
4043 unsigned char b2 = buffer[i+2]; | |
4044 unsigned char b3 = buffer[i+3]; | |
4045 // For an unsigned char v, | |
4046 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
4047 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
4048 unsigned char res = b0 | b0 - 1 | | |
4049 b1 | b1 - 1 | | |
4050 b2 | b2 - 1 | | |
4051 b3 | b3 - 1; | |
4052 if (res >= 128) break; | |
4053 i += 4; | |
4054 } | |
4055 for(; i < length; i++) { | |
4056 unsigned short c; | |
4057 // no embedded zeros | |
4058 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
4059 if(buffer[i] < 128) { | |
4060 continue; | |
4061 } | |
4062 if ((i + 5) < length) { // see if it's legal supplementary character | |
4063 if (UTF8::is_supplementary_character(&buffer[i])) { | |
4064 c = UTF8::get_supplementary_character(&buffer[i]); | |
4065 i += 5; | |
4066 continue; | |
4067 } | |
4068 } | |
4069 switch (buffer[i] >> 4) { | |
4070 default: break; | |
4071 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
4072 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
4073 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
4074 c = (buffer[i] & 0x1F) << 6; | |
4075 i++; | |
4076 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
4077 c += buffer[i] & 0x3F; | |
4078 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
4079 // for classes with major > 47, c must a null or a character in its shortest form | |
4080 break; | |
4081 } | |
4082 } | |
4083 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
4084 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
4085 c = (buffer[i] & 0xF) << 12; | |
4086 i += 2; | |
4087 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
4088 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
4089 if (_major_version <= 47 || c >= 0x800) { | |
4090 // for classes with major > 47, c must be in its shortest form | |
4091 break; | |
4092 } | |
4093 } | |
4094 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
4095 } // end of switch | |
4096 } // end of for | |
4097 } | |
4098 | |
4099 // Checks if name is a legal class name. | |
4100 void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) { | |
4101 if (!_need_verify || _relax_verify) { return; } | |
4102 | |
4103 char buf[fixed_buffer_size]; | |
4104 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
4105 unsigned int length = name->utf8_length(); | |
4106 bool legal = false; | |
4107 | |
4108 if (length > 0) { | |
4109 char* p; | |
4110 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
4111 p = skip_over_field_signature(bytes, false, length, CHECK); | |
4112 legal = (p != NULL) && ((p - bytes) == (int)length); | |
4113 } else if (_major_version < JAVA_1_5_VERSION) { | |
4114 if (bytes[0] != '<') { | |
4115 p = skip_over_field_name(bytes, true, length); | |
4116 legal = (p != NULL) && ((p - bytes) == (int)length); | |
4117 } | |
4118 } else { | |
4119 // 4900761: relax the constraints based on JSR202 spec | |
4120 // Class names may be drawn from the entire Unicode character set. | |
4121 // Identifiers between '/' must be unqualified names. | |
4122 // The utf8 string has been verified when parsing cpool entries. | |
4123 legal = verify_unqualified_name(bytes, length, LegalClass); | |
4124 } | |
4125 } | |
4126 if (!legal) { | |
4127 ResourceMark rm(THREAD); | |
4128 Exceptions::fthrow( | |
4129 THREAD_AND_LOCATION, | |
4130 vmSymbolHandles::java_lang_ClassFormatError(), | |
4131 "Illegal class name \"%s\" in class file %s", bytes, | |
4132 _class_name->as_C_string() | |
4133 ); | |
4134 return; | |
4135 } | |
4136 } | |
4137 | |
4138 // Checks if name is a legal field name. | |
4139 void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) { | |
4140 if (!_need_verify || _relax_verify) { return; } | |
4141 | |
4142 char buf[fixed_buffer_size]; | |
4143 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
4144 unsigned int length = name->utf8_length(); | |
4145 bool legal = false; | |
4146 | |
4147 if (length > 0) { | |
4148 if (_major_version < JAVA_1_5_VERSION) { | |
4149 if (bytes[0] != '<') { | |
4150 char* p = skip_over_field_name(bytes, false, length); | |
4151 legal = (p != NULL) && ((p - bytes) == (int)length); | |
4152 } | |
4153 } else { | |
4154 // 4881221: relax the constraints based on JSR202 spec | |
4155 legal = verify_unqualified_name(bytes, length, LegalField); | |
4156 } | |
4157 } | |
4158 | |
4159 if (!legal) { | |
4160 ResourceMark rm(THREAD); | |
4161 Exceptions::fthrow( | |
4162 THREAD_AND_LOCATION, | |
4163 vmSymbolHandles::java_lang_ClassFormatError(), | |
4164 "Illegal field name \"%s\" in class %s", bytes, | |
4165 _class_name->as_C_string() | |
4166 ); | |
4167 return; | |
4168 } | |
4169 } | |
4170 | |
4171 // Checks if name is a legal method name. | |
4172 void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) { | |
4173 if (!_need_verify || _relax_verify) { return; } | |
4174 | |
4175 assert(!name.is_null(), "method name is null"); | |
4176 char buf[fixed_buffer_size]; | |
4177 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
4178 unsigned int length = name->utf8_length(); | |
4179 bool legal = false; | |
4180 | |
4181 if (length > 0) { | |
4182 if (bytes[0] == '<') { | |
4183 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
4184 legal = true; | |
4185 } | |
4186 } else if (_major_version < JAVA_1_5_VERSION) { | |
4187 char* p; | |
4188 p = skip_over_field_name(bytes, false, length); | |
4189 legal = (p != NULL) && ((p - bytes) == (int)length); | |
4190 } else { | |
4191 // 4881221: relax the constraints based on JSR202 spec | |
4192 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
4193 } | |
4194 } | |
4195 | |
4196 if (!legal) { | |
4197 ResourceMark rm(THREAD); | |
4198 Exceptions::fthrow( | |
4199 THREAD_AND_LOCATION, | |
4200 vmSymbolHandles::java_lang_ClassFormatError(), | |
4201 "Illegal method name \"%s\" in class %s", bytes, | |
4202 _class_name->as_C_string() | |
4203 ); | |
4204 return; | |
4205 } | |
4206 } | |
4207 | |
4208 | |
4209 // Checks if signature is a legal field signature. | |
4210 void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
4211 if (!_need_verify) { return; } | |
4212 | |
4213 char buf[fixed_buffer_size]; | |
4214 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
4215 unsigned int length = signature->utf8_length(); | |
4216 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
4217 | |
4218 if (p == NULL || (p - bytes) != (int)length) { | |
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changeset
|
4219 throwIllegalSignature("Field", name, signature, CHECK); |
0 | 4220 } |
4221 } | |
4222 | |
4223 // Checks if signature is a legal method signature. | |
4224 // Returns number of parameters | |
4225 int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) { | |
4226 if (!_need_verify) { | |
4227 // make sure caller's args_size will be less than 0 even for non-static | |
4228 // method so it will be recomputed in compute_size_of_parameters(). | |
4229 return -2; | |
4230 } | |
4231 | |
4232 unsigned int args_size = 0; | |
4233 char buf[fixed_buffer_size]; | |
4234 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
4235 unsigned int length = signature->utf8_length(); | |
4236 char* nextp; | |
4237 | |
4238 // The first character must be a '(' | |
4239 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
4240 length--; | |
4241 // Skip over legal field signatures | |
4242 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
4243 while ((length > 0) && (nextp != NULL)) { | |
4244 args_size++; | |
4245 if (p[0] == 'J' || p[0] == 'D') { | |
4246 args_size++; | |
4247 } | |
4248 length -= nextp - p; | |
4249 p = nextp; | |
4250 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
4251 } | |
4252 // The first non-signature thing better be a ')' | |
4253 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
4254 length--; | |
4255 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
4256 // All internal methods must return void | |
4257 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
4258 return args_size; | |
4259 } | |
4260 } else { | |
4261 // Now we better just have a return value | |
4262 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
4263 if (nextp && ((int)length == (nextp - p))) { | |
4264 return args_size; | |
4265 } | |
4266 } | |
4267 } | |
4268 } | |
4269 // Report error | |
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changeset
|
4270 throwIllegalSignature("Method", name, signature, CHECK_0); |
0 | 4271 return 0; |
4272 } | |
4273 | |
4274 | |
4275 // Unqualified names may not contain the characters '.', ';', or '/'. | |
4276 // Method names also may not contain the characters '<' or '>', unless <init> or <clinit>. | |
4277 // Note that method names may not be <init> or <clinit> in this method. | |
4278 // Because these names have been checked as special cases before calling this method | |
4279 // in verify_legal_method_name. | |
4280 bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) { | |
4281 jchar ch; | |
4282 | |
4283 for (char* p = name; p != name + length; ) { | |
4284 ch = *p; | |
4285 if (ch < 128) { | |
4286 p++; | |
4287 if (ch == '.' || ch == ';') { | |
4288 return false; // do not permit '.' or ';' | |
4289 } | |
4290 if (type != LegalClass && ch == '/') { | |
4291 return false; // do not permit '/' unless it's class name | |
4292 } | |
4293 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
4294 return false; // do not permit '<' or '>' in method names | |
4295 } | |
4296 } else { | |
4297 char* tmp_p = UTF8::next(p, &ch); | |
4298 p = tmp_p; | |
4299 } | |
4300 } | |
4301 return true; | |
4302 } | |
4303 | |
4304 | |
4305 // Take pointer to a string. Skip over the longest part of the string that could | |
4306 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
4307 // Return a pointer to just past the fieldname. | |
4308 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
4309 // being true, we saw consecutive slashes (meaning we were looking for a | |
4310 // qualified path but found something that was badly-formed). | |
4311 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
4312 char* p; | |
4313 jchar ch; | |
4314 jboolean last_is_slash = false; | |
4315 jboolean not_first_ch = false; | |
4316 | |
4317 for (p = name; p != name + length; not_first_ch = true) { | |
4318 char* old_p = p; | |
4319 ch = *p; | |
4320 if (ch < 128) { | |
4321 p++; | |
4322 // quick check for ascii | |
4323 if ((ch >= 'a' && ch <= 'z') || | |
4324 (ch >= 'A' && ch <= 'Z') || | |
4325 (ch == '_' || ch == '$') || | |
4326 (not_first_ch && ch >= '0' && ch <= '9')) { | |
4327 last_is_slash = false; | |
4328 continue; | |
4329 } | |
4330 if (slash_ok && ch == '/') { | |
4331 if (last_is_slash) { | |
4332 return NULL; // Don't permit consecutive slashes | |
4333 } | |
4334 last_is_slash = true; | |
4335 continue; | |
4336 } | |
4337 } else { | |
4338 jint unicode_ch; | |
4339 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
4340 p = tmp_p; | |
4341 last_is_slash = false; | |
4342 // Check if ch is Java identifier start or is Java identifier part | |
4343 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
4344 EXCEPTION_MARK; | |
1142 | 4345 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass()); |
0 | 4346 |
4347 // return value | |
4348 JavaValue result(T_BOOLEAN); | |
4349 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
4350 JavaCallArguments args; | |
4351 args.push_int(unicode_ch); | |
4352 | |
4353 // public static boolean isJavaIdentifierStart(char ch); | |
4354 JavaCalls::call_static(&result, | |
4355 klass, | |
4356 vmSymbolHandles::isJavaIdentifierStart_name(), | |
4357 vmSymbolHandles::int_bool_signature(), | |
4358 &args, | |
4359 THREAD); | |
4360 | |
4361 if (HAS_PENDING_EXCEPTION) { | |
4362 CLEAR_PENDING_EXCEPTION; | |
4363 return 0; | |
4364 } | |
4365 if (result.get_jboolean()) { | |
4366 continue; | |
4367 } | |
4368 | |
4369 if (not_first_ch) { | |
4370 // public static boolean isJavaIdentifierPart(char ch); | |
4371 JavaCalls::call_static(&result, | |
4372 klass, | |
4373 vmSymbolHandles::isJavaIdentifierPart_name(), | |
4374 vmSymbolHandles::int_bool_signature(), | |
4375 &args, | |
4376 THREAD); | |
4377 | |
4378 if (HAS_PENDING_EXCEPTION) { | |
4379 CLEAR_PENDING_EXCEPTION; | |
4380 return 0; | |
4381 } | |
4382 | |
4383 if (result.get_jboolean()) { | |
4384 continue; | |
4385 } | |
4386 } | |
4387 } | |
4388 return (not_first_ch) ? old_p : NULL; | |
4389 } | |
4390 return (not_first_ch) ? p : NULL; | |
4391 } | |
4392 | |
4393 | |
4394 // Take pointer to a string. Skip over the longest part of the string that could | |
4395 // be taken as a field signature. Allow "void" if void_ok. | |
4396 // Return a pointer to just past the signature. | |
4397 // Return NULL if no legal signature is found. | |
4398 char* ClassFileParser::skip_over_field_signature(char* signature, | |
4399 bool void_ok, | |
4400 unsigned int length, | |
4401 TRAPS) { | |
4402 unsigned int array_dim = 0; | |
4403 while (length > 0) { | |
4404 switch (signature[0]) { | |
4405 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
4406 case JVM_SIGNATURE_BOOLEAN: | |
4407 case JVM_SIGNATURE_BYTE: | |
4408 case JVM_SIGNATURE_CHAR: | |
4409 case JVM_SIGNATURE_SHORT: | |
4410 case JVM_SIGNATURE_INT: | |
4411 case JVM_SIGNATURE_FLOAT: | |
4412 case JVM_SIGNATURE_LONG: | |
4413 case JVM_SIGNATURE_DOUBLE: | |
4414 return signature + 1; | |
4415 case JVM_SIGNATURE_CLASS: { | |
4416 if (_major_version < JAVA_1_5_VERSION) { | |
4417 // Skip over the class name if one is there | |
4418 char* p = skip_over_field_name(signature + 1, true, --length); | |
4419 | |
4420 // The next character better be a semicolon | |
4421 if (p && (p - signature) > 1 && p[0] == ';') { | |
4422 return p + 1; | |
4423 } | |
4424 } else { | |
4425 // 4900761: For class version > 48, any unicode is allowed in class name. | |
4426 length--; | |
4427 signature++; | |
4428 while (length > 0 && signature[0] != ';') { | |
4429 if (signature[0] == '.') { | |
4430 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
4431 } | |
4432 length--; | |
4433 signature++; | |
4434 } | |
4435 if (signature[0] == ';') { return signature + 1; } | |
4436 } | |
4437 | |
4438 return NULL; | |
4439 } | |
4440 case JVM_SIGNATURE_ARRAY: | |
4441 array_dim++; | |
4442 if (array_dim > 255) { | |
4443 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
4444 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
4445 } | |
4446 // The rest of what's there better be a legal signature | |
4447 signature++; | |
4448 length--; | |
4449 void_ok = false; | |
4450 break; | |
4451 | |
4452 default: | |
4453 return NULL; | |
4454 } | |
4455 } | |
4456 return NULL; | |
4457 } |