Mercurial > hg > truffle
annotate src/share/vm/classfile/classFileParser.cpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | ef3c5db0b3ae |
| children | c5a923563727 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/classFileParser.hpp" | |
| 27 #include "classfile/classLoader.hpp" | |
| 28 #include "classfile/javaClasses.hpp" | |
| 29 #include "classfile/symbolTable.hpp" | |
| 30 #include "classfile/systemDictionary.hpp" | |
| 31 #include "classfile/verificationType.hpp" | |
| 32 #include "classfile/verifier.hpp" | |
| 33 #include "classfile/vmSymbols.hpp" | |
| 34 #include "memory/allocation.hpp" | |
| 35 #include "memory/gcLocker.hpp" | |
| 36 #include "memory/oopFactory.hpp" | |
| 37 #include "memory/universe.inline.hpp" | |
| 38 #include "oops/constantPoolOop.hpp" | |
| 39 #include "oops/instanceKlass.hpp" | |
| 40 #include "oops/klass.inline.hpp" | |
| 41 #include "oops/klassOop.hpp" | |
| 42 #include "oops/klassVtable.hpp" | |
| 43 #include "oops/methodOop.hpp" | |
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44 #include "oops/symbol.hpp" |
| 1972 | 45 #include "prims/jvmtiExport.hpp" |
| 46 #include "runtime/javaCalls.hpp" | |
| 47 #include "runtime/perfData.hpp" | |
| 48 #include "runtime/reflection.hpp" | |
| 49 #include "runtime/signature.hpp" | |
| 50 #include "runtime/timer.hpp" | |
| 51 #include "services/classLoadingService.hpp" | |
| 52 #include "services/threadService.hpp" | |
| 0 | 53 |
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54 // We generally try to create the oops directly when parsing, rather than |
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55 // allocating temporary data structures and copying the bytes twice. A |
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56 // temporary area is only needed when parsing utf8 entries in the constant |
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57 // pool and when parsing line number tables. |
| 0 | 58 |
| 59 // We add assert in debug mode when class format is not checked. | |
| 60 | |
| 61 #define JAVA_CLASSFILE_MAGIC 0xCAFEBABE | |
| 62 #define JAVA_MIN_SUPPORTED_VERSION 45 | |
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63 #define JAVA_MAX_SUPPORTED_VERSION 51 |
| 0 | 64 #define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 |
| 65 | |
| 66 // Used for two backward compatibility reasons: | |
| 67 // - to check for new additions to the class file format in JDK1.5 | |
| 68 // - to check for bug fixes in the format checker in JDK1.5 | |
| 69 #define JAVA_1_5_VERSION 49 | |
| 70 | |
| 71 // Used for backward compatibility reasons: | |
| 72 // - to check for javac bug fixes that happened after 1.5 | |
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73 // - also used as the max version when running in jdk6 |
| 0 | 74 #define JAVA_6_VERSION 50 |
| 75 | |
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76 // Used for backward compatibility reasons: |
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77 // - to check NameAndType_info signatures more aggressively |
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78 #define JAVA_7_VERSION 51 |
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79 |
| 0 | 80 |
| 81 void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) { | |
| 82 // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize | |
| 83 // this function (_current can be allocated in a register, with scalar | |
| 84 // replacement of aggregates). The _current pointer is copied back to | |
| 85 // stream() when this function returns. DON'T call another method within | |
| 86 // this method that uses stream(). | |
| 87 ClassFileStream* cfs0 = stream(); | |
| 88 ClassFileStream cfs1 = *cfs0; | |
| 89 ClassFileStream* cfs = &cfs1; | |
| 90 #ifdef ASSERT | |
| 1685 | 91 assert(cfs->allocated_on_stack(),"should be local"); |
| 0 | 92 u1* old_current = cfs0->current(); |
| 93 #endif | |
| 94 | |
| 95 // Used for batching symbol allocations. | |
| 96 const char* names[SymbolTable::symbol_alloc_batch_size]; | |
| 97 int lengths[SymbolTable::symbol_alloc_batch_size]; | |
| 98 int indices[SymbolTable::symbol_alloc_batch_size]; | |
| 99 unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; | |
| 100 int names_count = 0; | |
| 101 | |
| 102 // parsing Index 0 is unused | |
| 103 for (int index = 1; index < length; index++) { | |
| 104 // Each of the following case guarantees one more byte in the stream | |
| 105 // for the following tag or the access_flags following constant pool, | |
| 106 // so we don't need bounds-check for reading tag. | |
| 107 u1 tag = cfs->get_u1_fast(); | |
| 108 switch (tag) { | |
| 109 case JVM_CONSTANT_Class : | |
| 110 { | |
| 111 cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags | |
| 112 u2 name_index = cfs->get_u2_fast(); | |
| 113 cp->klass_index_at_put(index, name_index); | |
| 114 } | |
| 115 break; | |
| 116 case JVM_CONSTANT_Fieldref : | |
| 117 { | |
| 118 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 119 u2 class_index = cfs->get_u2_fast(); | |
| 120 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 121 cp->field_at_put(index, class_index, name_and_type_index); | |
| 122 } | |
| 123 break; | |
| 124 case JVM_CONSTANT_Methodref : | |
| 125 { | |
| 126 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 127 u2 class_index = cfs->get_u2_fast(); | |
| 128 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 129 cp->method_at_put(index, class_index, name_and_type_index); | |
| 130 } | |
| 131 break; | |
| 132 case JVM_CONSTANT_InterfaceMethodref : | |
| 133 { | |
| 134 cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags | |
| 135 u2 class_index = cfs->get_u2_fast(); | |
| 136 u2 name_and_type_index = cfs->get_u2_fast(); | |
| 137 cp->interface_method_at_put(index, class_index, name_and_type_index); | |
| 138 } | |
| 139 break; | |
| 140 case JVM_CONSTANT_String : | |
| 141 { | |
| 142 cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags | |
| 143 u2 string_index = cfs->get_u2_fast(); | |
| 144 cp->string_index_at_put(index, string_index); | |
| 145 } | |
| 146 break; | |
| 1602 | 147 case JVM_CONSTANT_MethodHandle : |
| 148 case JVM_CONSTANT_MethodType : | |
| 149 if (!EnableMethodHandles || | |
| 150 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { | |
| 151 classfile_parse_error( | |
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152 (!EnableMethodHandles ? |
| 1602 | 153 "This JVM does not support constant tag %u in class file %s" : |
| 154 "Class file version does not support constant tag %u in class file %s"), | |
| 155 tag, CHECK); | |
| 156 } | |
| 157 if (tag == JVM_CONSTANT_MethodHandle) { | |
| 158 cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags | |
| 159 u1 ref_kind = cfs->get_u1_fast(); | |
| 160 u2 method_index = cfs->get_u2_fast(); | |
| 161 cp->method_handle_index_at_put(index, ref_kind, method_index); | |
| 162 } else if (tag == JVM_CONSTANT_MethodType) { | |
| 163 cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags | |
| 164 u2 signature_index = cfs->get_u2_fast(); | |
| 165 cp->method_type_index_at_put(index, signature_index); | |
| 166 } else { | |
| 167 ShouldNotReachHere(); | |
| 168 } | |
| 169 break; | |
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170 case JVM_CONSTANT_InvokeDynamicTrans : // this tag appears only in old classfiles |
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171 case JVM_CONSTANT_InvokeDynamic : |
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172 { |
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173 if (!EnableInvokeDynamic || |
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174 _major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { |
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175 classfile_parse_error( |
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176 (!EnableInvokeDynamic ? |
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177 "This JVM does not support constant tag %u in class file %s" : |
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178 "Class file version does not support constant tag %u in class file %s"), |
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179 tag, CHECK); |
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180 } |
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181 cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags |
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182 u2 bootstrap_specifier_index = cfs->get_u2_fast(); |
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183 u2 name_and_type_index = cfs->get_u2_fast(); |
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184 if (tag == JVM_CONSTANT_InvokeDynamicTrans) { |
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185 if (!AllowTransitionalJSR292) |
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186 classfile_parse_error( |
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187 "This JVM does not support transitional InvokeDynamic tag %u in class file %s", |
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188 tag, CHECK); |
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189 cp->invoke_dynamic_trans_at_put(index, bootstrap_specifier_index, name_and_type_index); |
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190 break; |
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191 } |
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192 if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) |
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193 _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later |
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194 cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); |
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195 } |
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196 break; |
| 0 | 197 case JVM_CONSTANT_Integer : |
| 198 { | |
| 199 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 200 u4 bytes = cfs->get_u4_fast(); | |
| 201 cp->int_at_put(index, (jint) bytes); | |
| 202 } | |
| 203 break; | |
| 204 case JVM_CONSTANT_Float : | |
| 205 { | |
| 206 cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags | |
| 207 u4 bytes = cfs->get_u4_fast(); | |
| 208 cp->float_at_put(index, *(jfloat*)&bytes); | |
| 209 } | |
| 210 break; | |
| 211 case JVM_CONSTANT_Long : | |
| 212 // A mangled type might cause you to overrun allocated memory | |
| 213 guarantee_property(index+1 < length, | |
| 214 "Invalid constant pool entry %u in class file %s", | |
| 215 index, CHECK); | |
| 216 { | |
| 217 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 218 u8 bytes = cfs->get_u8_fast(); | |
| 219 cp->long_at_put(index, bytes); | |
| 220 } | |
| 221 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 222 break; | |
| 223 case JVM_CONSTANT_Double : | |
| 224 // A mangled type might cause you to overrun allocated memory | |
| 225 guarantee_property(index+1 < length, | |
| 226 "Invalid constant pool entry %u in class file %s", | |
| 227 index, CHECK); | |
| 228 { | |
| 229 cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags | |
| 230 u8 bytes = cfs->get_u8_fast(); | |
| 231 cp->double_at_put(index, *(jdouble*)&bytes); | |
| 232 } | |
| 233 index++; // Skip entry following eigth-byte constant, see JVM book p. 98 | |
| 234 break; | |
| 235 case JVM_CONSTANT_NameAndType : | |
| 236 { | |
| 237 cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags | |
| 238 u2 name_index = cfs->get_u2_fast(); | |
| 239 u2 signature_index = cfs->get_u2_fast(); | |
| 240 cp->name_and_type_at_put(index, name_index, signature_index); | |
| 241 } | |
| 242 break; | |
| 243 case JVM_CONSTANT_Utf8 : | |
| 244 { | |
| 245 cfs->guarantee_more(2, CHECK); // utf8_length | |
| 246 u2 utf8_length = cfs->get_u2_fast(); | |
| 247 u1* utf8_buffer = cfs->get_u1_buffer(); | |
| 248 assert(utf8_buffer != NULL, "null utf8 buffer"); | |
| 249 // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. | |
| 250 cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags | |
| 251 cfs->skip_u1_fast(utf8_length); | |
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252 |
| 0 | 253 // Before storing the symbol, make sure it's legal |
| 254 if (_need_verify) { | |
| 255 verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); | |
| 256 } | |
| 257 | |
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258 if (AnonymousClasses && has_cp_patch_at(index)) { |
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259 Handle patch = clear_cp_patch_at(index); |
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260 guarantee_property(java_lang_String::is_instance(patch()), |
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261 "Illegal utf8 patch at %d in class file %s", |
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262 index, CHECK); |
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263 char* str = java_lang_String::as_utf8_string(patch()); |
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264 // (could use java_lang_String::as_symbol instead, but might as well batch them) |
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265 utf8_buffer = (u1*) str; |
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266 utf8_length = (int) strlen(str); |
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267 } |
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268 |
| 0 | 269 unsigned int hash; |
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270 Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); |
| 0 | 271 if (result == NULL) { |
| 272 names[names_count] = (char*)utf8_buffer; | |
| 273 lengths[names_count] = utf8_length; | |
| 274 indices[names_count] = index; | |
| 275 hashValues[names_count++] = hash; | |
| 276 if (names_count == SymbolTable::symbol_alloc_batch_size) { | |
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277 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); |
| 0 | 278 names_count = 0; |
| 279 } | |
| 280 } else { | |
| 281 cp->symbol_at_put(index, result); | |
| 282 } | |
| 283 } | |
| 284 break; | |
| 285 default: | |
| 286 classfile_parse_error( | |
| 287 "Unknown constant tag %u in class file %s", tag, CHECK); | |
| 288 break; | |
| 289 } | |
| 290 } | |
| 291 | |
| 292 // Allocate the remaining symbols | |
| 293 if (names_count > 0) { | |
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294 SymbolTable::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK); |
| 0 | 295 } |
| 296 | |
| 297 // Copy _current pointer of local copy back to stream(). | |
| 298 #ifdef ASSERT | |
| 299 assert(cfs0->current() == old_current, "non-exclusive use of stream()"); | |
| 300 #endif | |
| 301 cfs0->set_current(cfs1.current()); | |
| 302 } | |
| 303 | |
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304 // This class unreferences constant pool symbols if an error has occurred |
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305 // while parsing the class before it is assigned into the class. |
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306 // If it gets an error after that it is unloaded and the constant pool will |
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307 // be cleaned up then. |
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308 class ConstantPoolCleaner : public StackObj { |
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309 constantPoolHandle _cphandle; |
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310 bool _in_error; |
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311 public: |
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312 ConstantPoolCleaner(constantPoolHandle cp) : _cphandle(cp), _in_error(true) {} |
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313 ~ConstantPoolCleaner() { |
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314 if (_in_error && _cphandle.not_null()) { |
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315 _cphandle->unreference_symbols(); |
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316 } |
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317 } |
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318 void set_in_error(bool clean) { _in_error = clean; } |
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319 }; |
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320 |
| 0 | 321 bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } |
| 322 | |
| 323 constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { | |
| 324 ClassFileStream* cfs = stream(); | |
| 325 constantPoolHandle nullHandle; | |
| 326 | |
| 327 cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag | |
| 328 u2 length = cfs->get_u2_fast(); | |
| 329 guarantee_property( | |
| 330 length >= 1, "Illegal constant pool size %u in class file %s", | |
| 331 length, CHECK_(nullHandle)); | |
| 332 constantPoolOop constant_pool = | |
|
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333 oopFactory::new_constantPool(length, |
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334 methodOopDesc::IsSafeConc, |
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335 CHECK_(nullHandle)); |
| 0 | 336 constantPoolHandle cp (THREAD, constant_pool); |
| 337 | |
| 338 cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops | |
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339 ConstantPoolCleaner cp_in_error(cp); // set constant pool to be cleaned up. |
| 0 | 340 |
| 341 // parsing constant pool entries | |
| 342 parse_constant_pool_entries(cp, length, CHECK_(nullHandle)); | |
| 343 | |
| 344 int index = 1; // declared outside of loops for portability | |
| 345 | |
| 346 // first verification pass - validate cross references and fixup class and string constants | |
| 347 for (index = 1; index < length; index++) { // Index 0 is unused | |
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348 jbyte tag = cp->tag_at(index).value(); |
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349 switch (tag) { |
| 0 | 350 case JVM_CONSTANT_Class : |
| 351 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 352 break; | |
| 353 case JVM_CONSTANT_Fieldref : | |
| 354 // fall through | |
| 355 case JVM_CONSTANT_Methodref : | |
| 356 // fall through | |
| 357 case JVM_CONSTANT_InterfaceMethodref : { | |
| 358 if (!_need_verify) break; | |
| 359 int klass_ref_index = cp->klass_ref_index_at(index); | |
| 360 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 361 check_property(valid_cp_range(klass_ref_index, length) && | |
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362 is_klass_reference(cp, klass_ref_index), |
| 0 | 363 "Invalid constant pool index %u in class file %s", |
| 364 klass_ref_index, | |
| 365 CHECK_(nullHandle)); | |
| 366 check_property(valid_cp_range(name_and_type_ref_index, length) && | |
| 367 cp->tag_at(name_and_type_ref_index).is_name_and_type(), | |
| 368 "Invalid constant pool index %u in class file %s", | |
| 369 name_and_type_ref_index, | |
| 370 CHECK_(nullHandle)); | |
| 371 break; | |
| 372 } | |
| 373 case JVM_CONSTANT_String : | |
| 374 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 375 break; | |
| 376 case JVM_CONSTANT_Integer : | |
| 377 break; | |
| 378 case JVM_CONSTANT_Float : | |
| 379 break; | |
| 380 case JVM_CONSTANT_Long : | |
| 381 case JVM_CONSTANT_Double : | |
| 382 index++; | |
| 383 check_property( | |
| 384 (index < length && cp->tag_at(index).is_invalid()), | |
| 385 "Improper constant pool long/double index %u in class file %s", | |
| 386 index, CHECK_(nullHandle)); | |
| 387 break; | |
| 388 case JVM_CONSTANT_NameAndType : { | |
| 389 if (!_need_verify) break; | |
| 390 int name_ref_index = cp->name_ref_index_at(index); | |
| 391 int signature_ref_index = cp->signature_ref_index_at(index); | |
| 392 check_property( | |
| 393 valid_cp_range(name_ref_index, length) && | |
| 394 cp->tag_at(name_ref_index).is_utf8(), | |
| 395 "Invalid constant pool index %u in class file %s", | |
| 396 name_ref_index, CHECK_(nullHandle)); | |
| 397 check_property( | |
| 398 valid_cp_range(signature_ref_index, length) && | |
| 399 cp->tag_at(signature_ref_index).is_utf8(), | |
| 400 "Invalid constant pool index %u in class file %s", | |
| 401 signature_ref_index, CHECK_(nullHandle)); | |
| 402 break; | |
| 403 } | |
| 404 case JVM_CONSTANT_Utf8 : | |
| 405 break; | |
| 406 case JVM_CONSTANT_UnresolvedClass : // fall-through | |
| 407 case JVM_CONSTANT_UnresolvedClassInError: | |
| 408 ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present | |
| 409 break; | |
| 410 case JVM_CONSTANT_ClassIndex : | |
| 411 { | |
| 412 int class_index = cp->klass_index_at(index); | |
| 413 check_property( | |
| 414 valid_cp_range(class_index, length) && | |
| 415 cp->tag_at(class_index).is_utf8(), | |
| 416 "Invalid constant pool index %u in class file %s", | |
| 417 class_index, CHECK_(nullHandle)); | |
| 418 cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); | |
| 419 } | |
| 420 break; | |
| 421 case JVM_CONSTANT_UnresolvedString : | |
| 422 ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present | |
| 423 break; | |
| 424 case JVM_CONSTANT_StringIndex : | |
| 425 { | |
| 426 int string_index = cp->string_index_at(index); | |
| 427 check_property( | |
| 428 valid_cp_range(string_index, length) && | |
| 429 cp->tag_at(string_index).is_utf8(), | |
| 430 "Invalid constant pool index %u in class file %s", | |
| 431 string_index, CHECK_(nullHandle)); | |
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432 Symbol* sym = cp->symbol_at(string_index); |
| 0 | 433 cp->unresolved_string_at_put(index, sym); |
| 434 } | |
| 435 break; | |
| 1602 | 436 case JVM_CONSTANT_MethodHandle : |
| 437 { | |
| 438 int ref_index = cp->method_handle_index_at(index); | |
| 439 check_property( | |
| 440 valid_cp_range(ref_index, length) && | |
| 441 EnableMethodHandles, | |
| 442 "Invalid constant pool index %u in class file %s", | |
| 443 ref_index, CHECK_(nullHandle)); | |
| 444 constantTag tag = cp->tag_at(ref_index); | |
| 445 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 446 switch (ref_kind) { | |
| 447 case JVM_REF_getField: | |
| 448 case JVM_REF_getStatic: | |
| 449 case JVM_REF_putField: | |
| 450 case JVM_REF_putStatic: | |
| 451 check_property( | |
| 452 tag.is_field(), | |
| 453 "Invalid constant pool index %u in class file %s (not a field)", | |
| 454 ref_index, CHECK_(nullHandle)); | |
| 455 break; | |
| 456 case JVM_REF_invokeVirtual: | |
| 457 case JVM_REF_invokeStatic: | |
| 458 case JVM_REF_invokeSpecial: | |
| 459 case JVM_REF_newInvokeSpecial: | |
| 460 check_property( | |
| 461 tag.is_method(), | |
| 462 "Invalid constant pool index %u in class file %s (not a method)", | |
| 463 ref_index, CHECK_(nullHandle)); | |
| 464 break; | |
| 465 case JVM_REF_invokeInterface: | |
| 466 check_property( | |
| 467 tag.is_interface_method(), | |
| 468 "Invalid constant pool index %u in class file %s (not an interface method)", | |
| 469 ref_index, CHECK_(nullHandle)); | |
| 470 break; | |
| 471 default: | |
| 472 classfile_parse_error( | |
| 473 "Bad method handle kind at constant pool index %u in class file %s", | |
| 474 index, CHECK_(nullHandle)); | |
| 475 } | |
| 476 // Keep the ref_index unchanged. It will be indirected at link-time. | |
| 477 } | |
| 478 break; | |
| 479 case JVM_CONSTANT_MethodType : | |
| 480 { | |
| 481 int ref_index = cp->method_type_index_at(index); | |
| 482 check_property( | |
| 483 valid_cp_range(ref_index, length) && | |
| 484 cp->tag_at(ref_index).is_utf8() && | |
| 485 EnableMethodHandles, | |
| 486 "Invalid constant pool index %u in class file %s", | |
| 487 ref_index, CHECK_(nullHandle)); | |
| 488 } | |
| 489 break; | |
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490 case JVM_CONSTANT_InvokeDynamicTrans : |
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491 case JVM_CONSTANT_InvokeDynamic : |
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492 { |
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493 int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index); |
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494 check_property(valid_cp_range(name_and_type_ref_index, length) && |
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495 cp->tag_at(name_and_type_ref_index).is_name_and_type(), |
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496 "Invalid constant pool index %u in class file %s", |
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497 name_and_type_ref_index, |
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498 CHECK_(nullHandle)); |
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499 if (tag == JVM_CONSTANT_InvokeDynamicTrans) { |
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500 int bootstrap_method_ref_index = cp->invoke_dynamic_bootstrap_method_ref_index_at(index); |
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501 check_property(valid_cp_range(bootstrap_method_ref_index, length) && |
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502 cp->tag_at(bootstrap_method_ref_index).is_method_handle(), |
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503 "Invalid constant pool index %u in class file %s", |
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504 bootstrap_method_ref_index, |
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505 CHECK_(nullHandle)); |
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506 } |
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507 // bootstrap specifier index must be checked later, when BootstrapMethods attr is available |
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508 break; |
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509 } |
| 0 | 510 default: |
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511 fatal(err_msg("bad constant pool tag value %u", |
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512 cp->tag_at(index).value())); |
| 0 | 513 ShouldNotReachHere(); |
| 514 break; | |
| 515 } // end of switch | |
| 516 } // end of for | |
| 517 | |
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518 if (_cp_patches != NULL) { |
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519 // need to treat this_class specially... |
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520 assert(AnonymousClasses, ""); |
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521 int this_class_index; |
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522 { |
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523 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len |
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524 u1* mark = cfs->current(); |
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525 u2 flags = cfs->get_u2_fast(); |
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526 this_class_index = cfs->get_u2_fast(); |
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527 cfs->set_current(mark); // revert to mark |
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528 } |
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529 |
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530 for (index = 1; index < length; index++) { // Index 0 is unused |
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531 if (has_cp_patch_at(index)) { |
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532 guarantee_property(index != this_class_index, |
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533 "Illegal constant pool patch to self at %d in class file %s", |
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534 index, CHECK_(nullHandle)); |
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535 patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); |
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536 } |
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537 } |
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538 // Ensure that all the patches have been used. |
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539 for (index = 0; index < _cp_patches->length(); index++) { |
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540 guarantee_property(!has_cp_patch_at(index), |
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541 "Unused constant pool patch at %d in class file %s", |
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542 index, CHECK_(nullHandle)); |
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543 } |
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544 } |
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545 |
| 0 | 546 if (!_need_verify) { |
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547 cp_in_error.set_in_error(false); |
| 0 | 548 return cp; |
| 549 } | |
| 550 | |
| 551 // second verification pass - checks the strings are of the right format. | |
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552 // but not yet to the other entries |
| 0 | 553 for (index = 1; index < length; index++) { |
| 554 jbyte tag = cp->tag_at(index).value(); | |
| 555 switch (tag) { | |
| 556 case JVM_CONSTANT_UnresolvedClass: { | |
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557 Symbol* class_name = cp->unresolved_klass_at(index); |
|
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558 // check the name, even if _cp_patches will overwrite it |
| 0 | 559 verify_legal_class_name(class_name, CHECK_(nullHandle)); |
| 560 break; | |
| 561 } | |
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562 case JVM_CONSTANT_NameAndType: { |
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563 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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564 int sig_index = cp->signature_ref_index_at(index); |
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565 int name_index = cp->name_ref_index_at(index); |
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566 Symbol* name = cp->symbol_at(name_index); |
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567 Symbol* sig = cp->symbol_at(sig_index); |
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568 if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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569 verify_legal_method_signature(name, sig, CHECK_(nullHandle)); |
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570 } else { |
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571 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); |
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572 } |
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573 } |
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574 break; |
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575 } |
| 0 | 576 case JVM_CONSTANT_Fieldref: |
| 577 case JVM_CONSTANT_Methodref: | |
| 578 case JVM_CONSTANT_InterfaceMethodref: { | |
| 579 int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); | |
| 580 // already verified to be utf8 | |
| 581 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
| 582 // already verified to be utf8 | |
| 583 int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); | |
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584 Symbol* name = cp->symbol_at(name_ref_index); |
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585 Symbol* signature = cp->symbol_at(signature_ref_index); |
| 0 | 586 if (tag == JVM_CONSTANT_Fieldref) { |
| 587 verify_legal_field_name(name, CHECK_(nullHandle)); | |
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588 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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589 // Signature is verified above, when iterating NameAndType_info. |
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590 // Need only to be sure it's the right type. |
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591 if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) { |
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592 throwIllegalSignature( |
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593 "Field", name, signature, CHECK_(nullHandle)); |
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594 } |
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595 } else { |
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596 verify_legal_field_signature(name, signature, CHECK_(nullHandle)); |
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597 } |
| 0 | 598 } else { |
| 599 verify_legal_method_name(name, CHECK_(nullHandle)); | |
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600 if (_need_verify && _major_version >= JAVA_7_VERSION) { |
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601 // Signature is verified above, when iterating NameAndType_info. |
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602 // Need only to be sure it's the right type. |
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603 if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) { |
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604 throwIllegalSignature( |
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605 "Method", name, signature, CHECK_(nullHandle)); |
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606 } |
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607 } else { |
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608 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); |
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609 } |
| 0 | 610 if (tag == JVM_CONSTANT_Methodref) { |
| 611 // 4509014: If a class method name begins with '<', it must be "<init>". | |
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612 assert(name != NULL, "method name in constant pool is null"); |
| 0 | 613 unsigned int name_len = name->utf8_length(); |
| 614 assert(name_len > 0, "bad method name"); // already verified as legal name | |
| 615 if (name->byte_at(0) == '<') { | |
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616 if (name != vmSymbols::object_initializer_name()) { |
| 0 | 617 classfile_parse_error( |
| 618 "Bad method name at constant pool index %u in class file %s", | |
| 619 name_ref_index, CHECK_(nullHandle)); | |
| 620 } | |
| 621 } | |
| 622 } | |
| 623 } | |
| 624 break; | |
| 625 } | |
| 1602 | 626 case JVM_CONSTANT_MethodHandle: { |
| 627 int ref_index = cp->method_handle_index_at(index); | |
| 628 int ref_kind = cp->method_handle_ref_kind_at(index); | |
| 629 switch (ref_kind) { | |
| 630 case JVM_REF_invokeVirtual: | |
| 631 case JVM_REF_invokeStatic: | |
| 632 case JVM_REF_invokeSpecial: | |
| 633 case JVM_REF_newInvokeSpecial: | |
| 634 { | |
| 635 int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index); | |
| 636 int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); | |
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637 Symbol* name = cp->symbol_at(name_ref_index); |
| 1602 | 638 if (ref_kind == JVM_REF_newInvokeSpecial) { |
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639 if (name != vmSymbols::object_initializer_name()) { |
| 1602 | 640 classfile_parse_error( |
| 641 "Bad constructor name at constant pool index %u in class file %s", | |
| 642 name_ref_index, CHECK_(nullHandle)); | |
| 643 } | |
| 644 } else { | |
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645 if (name == vmSymbols::object_initializer_name()) { |
| 1602 | 646 classfile_parse_error( |
| 647 "Bad method name at constant pool index %u in class file %s", | |
| 648 name_ref_index, CHECK_(nullHandle)); | |
| 649 } | |
| 650 } | |
| 651 } | |
| 652 break; | |
| 653 // Other ref_kinds are already fully checked in previous pass. | |
| 654 } | |
| 655 break; | |
| 656 } | |
| 657 case JVM_CONSTANT_MethodType: { | |
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658 Symbol* no_name = vmSymbols::type_name(); // place holder |
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659 Symbol* signature = cp->method_type_signature_at(index); |
| 1602 | 660 verify_legal_method_signature(no_name, signature, CHECK_(nullHandle)); |
| 661 break; | |
| 662 } | |
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663 case JVM_CONSTANT_Utf8: { |
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664 assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); |
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665 } |
| 0 | 666 } // end of switch |
| 667 } // end of for | |
| 668 | |
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669 cp_in_error.set_in_error(false); |
| 0 | 670 return cp; |
| 671 } | |
| 672 | |
| 673 | |
|
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674 void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { |
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675 assert(AnonymousClasses, ""); |
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676 BasicType patch_type = T_VOID; |
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677 switch (cp->tag_at(index).value()) { |
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678 |
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679 case JVM_CONSTANT_UnresolvedClass : |
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680 // Patching a class means pre-resolving it. |
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681 // The name in the constant pool is ignored. |
| 1602 | 682 if (java_lang_Class::is_instance(patch())) { |
|
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683 guarantee_property(!java_lang_Class::is_primitive(patch()), |
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684 "Illegal class patch at %d in class file %s", |
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685 index, CHECK); |
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686 cp->klass_at_put(index, java_lang_Class::as_klassOop(patch())); |
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687 } else { |
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688 guarantee_property(java_lang_String::is_instance(patch()), |
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689 "Illegal class patch at %d in class file %s", |
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690 index, CHECK); |
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691 Symbol* name = java_lang_String::as_symbol(patch(), CHECK); |
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692 cp->unresolved_klass_at_put(index, name); |
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693 } |
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694 break; |
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695 |
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696 case JVM_CONSTANT_UnresolvedString : |
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697 // Patching a string means pre-resolving it. |
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698 // The spelling in the constant pool is ignored. |
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699 // The constant reference may be any object whatever. |
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700 // If it is not a real interned string, the constant is referred |
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701 // to as a "pseudo-string", and must be presented to the CP |
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702 // explicitly, because it may require scavenging. |
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703 cp->pseudo_string_at_put(index, patch()); |
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704 break; |
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705 |
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706 case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; |
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707 case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; |
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708 case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; |
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709 case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; |
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710 patch_prim: |
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711 { |
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712 jvalue value; |
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713 BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); |
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714 guarantee_property(value_type == patch_type, |
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715 "Illegal primitive patch at %d in class file %s", |
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716 index, CHECK); |
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717 switch (value_type) { |
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718 case T_INT: cp->int_at_put(index, value.i); break; |
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719 case T_FLOAT: cp->float_at_put(index, value.f); break; |
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720 case T_LONG: cp->long_at_put(index, value.j); break; |
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721 case T_DOUBLE: cp->double_at_put(index, value.d); break; |
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722 default: assert(false, ""); |
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723 } |
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724 } |
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725 break; |
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726 |
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727 default: |
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728 // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. |
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729 guarantee_property(!has_cp_patch_at(index), |
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730 "Illegal unexpected patch at %d in class file %s", |
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731 index, CHECK); |
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732 return; |
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733 } |
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734 |
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735 // On fall-through, mark the patch as used. |
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736 clear_cp_patch_at(index); |
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737 } |
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738 |
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739 |
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740 |
| 0 | 741 class NameSigHash: public ResourceObj { |
| 742 public: | |
|
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743 Symbol* _name; // name |
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744 Symbol* _sig; // signature |
| 0 | 745 NameSigHash* _next; // Next entry in hash table |
| 746 }; | |
| 747 | |
| 748 | |
| 749 #define HASH_ROW_SIZE 256 | |
| 750 | |
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751 unsigned int hash(Symbol* name, Symbol* sig) { |
| 0 | 752 unsigned int raw_hash = 0; |
| 753 raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); | |
| 754 raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; | |
| 755 | |
| 756 return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; | |
| 757 } | |
| 758 | |
| 759 | |
| 760 void initialize_hashtable(NameSigHash** table) { | |
| 761 memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); | |
| 762 } | |
| 763 | |
| 764 // Return false if the name/sig combination is found in table. | |
| 765 // Return true if no duplicate is found. And name/sig is added as a new entry in table. | |
| 766 // The old format checker uses heap sort to find duplicates. | |
| 767 // NOTE: caller should guarantee that GC doesn't happen during the life cycle | |
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768 // of table since we don't expect Symbol*'s to move. |
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769 bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) { |
| 0 | 770 assert(name != NULL, "name in constant pool is NULL"); |
| 771 | |
| 772 // First lookup for duplicates | |
| 773 int index = hash(name, sig); | |
| 774 NameSigHash* entry = table[index]; | |
| 775 while (entry != NULL) { | |
| 776 if (entry->_name == name && entry->_sig == sig) { | |
| 777 return false; | |
| 778 } | |
| 779 entry = entry->_next; | |
| 780 } | |
| 781 | |
| 782 // No duplicate is found, allocate a new entry and fill it. | |
| 783 entry = new NameSigHash(); | |
| 784 entry->_name = name; | |
| 785 entry->_sig = sig; | |
| 786 | |
| 787 // Insert into hash table | |
| 788 entry->_next = table[index]; | |
| 789 table[index] = entry; | |
| 790 | |
| 791 return true; | |
| 792 } | |
| 793 | |
| 794 | |
| 795 objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp, | |
| 796 int length, | |
| 797 Handle class_loader, | |
| 798 Handle protection_domain, | |
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799 Symbol* class_name, |
| 0 | 800 TRAPS) { |
| 801 ClassFileStream* cfs = stream(); | |
| 802 assert(length > 0, "only called for length>0"); | |
| 803 objArrayHandle nullHandle; | |
| 804 objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 805 objArrayHandle interfaces (THREAD, interface_oop); | |
| 806 | |
| 807 int index; | |
| 808 for (index = 0; index < length; index++) { | |
| 809 u2 interface_index = cfs->get_u2(CHECK_(nullHandle)); | |
|
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810 KlassHandle interf; |
| 0 | 811 check_property( |
| 812 valid_cp_range(interface_index, cp->length()) && | |
|
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813 is_klass_reference(cp, interface_index), |
| 0 | 814 "Interface name has bad constant pool index %u in class file %s", |
| 815 interface_index, CHECK_(nullHandle)); | |
|
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816 if (cp->tag_at(interface_index).is_klass()) { |
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817 interf = KlassHandle(THREAD, cp->resolved_klass_at(interface_index)); |
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818 } else { |
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819 Symbol* unresolved_klass = cp->klass_name_at(interface_index); |
|
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820 |
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821 // Don't need to check legal name because it's checked when parsing constant pool. |
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822 // But need to make sure it's not an array type. |
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823 guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, |
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824 "Bad interface name in class file %s", CHECK_(nullHandle)); |
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825 |
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826 // Call resolve_super so classcircularity is checked |
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827 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, |
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828 unresolved_klass, class_loader, protection_domain, |
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829 false, CHECK_(nullHandle)); |
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830 interf = KlassHandle(THREAD, k); |
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831 |
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832 if (LinkWellKnownClasses) // my super type is well known to me |
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833 cp->klass_at_put(interface_index, interf()); // eagerly resolve |
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834 } |
| 0 | 835 |
| 836 if (!Klass::cast(interf())->is_interface()) { | |
| 837 THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle); | |
| 838 } | |
| 839 interfaces->obj_at_put(index, interf()); | |
| 840 } | |
| 841 | |
| 842 if (!_need_verify || length <= 1) { | |
| 843 return interfaces; | |
| 844 } | |
| 845 | |
| 846 // Check if there's any duplicates in interfaces | |
| 847 ResourceMark rm(THREAD); | |
| 848 NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 849 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 850 initialize_hashtable(interface_names); | |
| 851 bool dup = false; | |
| 852 { | |
| 853 debug_only(No_Safepoint_Verifier nsv;) | |
| 854 for (index = 0; index < length; index++) { | |
| 855 klassOop k = (klassOop)interfaces->obj_at(index); | |
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856 Symbol* name = instanceKlass::cast(k)->name(); |
| 0 | 857 // If no duplicates, add (name, NULL) in hashtable interface_names. |
| 858 if (!put_after_lookup(name, NULL, interface_names)) { | |
| 859 dup = true; | |
| 860 break; | |
| 861 } | |
| 862 } | |
| 863 } | |
| 864 if (dup) { | |
| 865 classfile_parse_error("Duplicate interface name in class file %s", | |
| 866 CHECK_(nullHandle)); | |
| 867 } | |
| 868 | |
| 869 return interfaces; | |
| 870 } | |
| 871 | |
| 872 | |
| 873 void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) { | |
| 874 // Make sure the constant pool entry is of a type appropriate to this field | |
| 875 guarantee_property( | |
| 876 (constantvalue_index > 0 && | |
| 877 constantvalue_index < cp->length()), | |
| 878 "Bad initial value index %u in ConstantValue attribute in class file %s", | |
| 879 constantvalue_index, CHECK); | |
| 880 constantTag value_type = cp->tag_at(constantvalue_index); | |
| 881 switch ( cp->basic_type_for_signature_at(signature_index) ) { | |
| 882 case T_LONG: | |
| 883 guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); | |
| 884 break; | |
| 885 case T_FLOAT: | |
| 886 guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); | |
| 887 break; | |
| 888 case T_DOUBLE: | |
| 889 guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); | |
| 890 break; | |
| 891 case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: | |
| 892 guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); | |
| 893 break; | |
| 894 case T_OBJECT: | |
|
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895 guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;") |
| 0 | 896 && (value_type.is_string() || value_type.is_unresolved_string())), |
| 897 "Bad string initial value in class file %s", CHECK); | |
| 898 break; | |
| 899 default: | |
| 900 classfile_parse_error( | |
| 901 "Unable to set initial value %u in class file %s", | |
| 902 constantvalue_index, CHECK); | |
| 903 } | |
| 904 } | |
| 905 | |
| 906 | |
| 907 // Parse attributes for a field. | |
| 908 void ClassFileParser::parse_field_attributes(constantPoolHandle cp, | |
| 909 u2 attributes_count, | |
| 910 bool is_static, u2 signature_index, | |
| 911 u2* constantvalue_index_addr, | |
| 912 bool* is_synthetic_addr, | |
| 913 u2* generic_signature_index_addr, | |
| 914 typeArrayHandle* field_annotations, | |
| 915 TRAPS) { | |
| 916 ClassFileStream* cfs = stream(); | |
| 917 assert(attributes_count > 0, "length should be greater than 0"); | |
| 918 u2 constantvalue_index = 0; | |
| 919 u2 generic_signature_index = 0; | |
| 920 bool is_synthetic = false; | |
| 921 u1* runtime_visible_annotations = NULL; | |
| 922 int runtime_visible_annotations_length = 0; | |
| 923 u1* runtime_invisible_annotations = NULL; | |
| 924 int runtime_invisible_annotations_length = 0; | |
| 925 while (attributes_count--) { | |
| 926 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 927 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 928 u4 attribute_length = cfs->get_u4_fast(); | |
| 929 check_property(valid_cp_range(attribute_name_index, cp->length()) && | |
| 930 cp->tag_at(attribute_name_index).is_utf8(), | |
| 931 "Invalid field attribute index %u in class file %s", | |
| 932 attribute_name_index, | |
| 933 CHECK); | |
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934 Symbol* attribute_name = cp->symbol_at(attribute_name_index); |
| 0 | 935 if (is_static && attribute_name == vmSymbols::tag_constant_value()) { |
| 936 // ignore if non-static | |
| 937 if (constantvalue_index != 0) { | |
| 938 classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); | |
| 939 } | |
| 940 check_property( | |
| 941 attribute_length == 2, | |
| 942 "Invalid ConstantValue field attribute length %u in class file %s", | |
| 943 attribute_length, CHECK); | |
| 944 constantvalue_index = cfs->get_u2(CHECK); | |
| 945 if (_need_verify) { | |
| 946 verify_constantvalue(constantvalue_index, signature_index, cp, CHECK); | |
| 947 } | |
| 948 } else if (attribute_name == vmSymbols::tag_synthetic()) { | |
| 949 if (attribute_length != 0) { | |
| 950 classfile_parse_error( | |
| 951 "Invalid Synthetic field attribute length %u in class file %s", | |
| 952 attribute_length, CHECK); | |
| 953 } | |
| 954 is_synthetic = true; | |
| 955 } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 956 if (attribute_length != 0) { | |
| 957 classfile_parse_error( | |
| 958 "Invalid Deprecated field attribute length %u in class file %s", | |
| 959 attribute_length, CHECK); | |
| 960 } | |
| 961 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 962 if (attribute_name == vmSymbols::tag_signature()) { | |
| 963 if (attribute_length != 2) { | |
| 964 classfile_parse_error( | |
| 965 "Wrong size %u for field's Signature attribute in class file %s", | |
| 966 attribute_length, CHECK); | |
| 967 } | |
| 968 generic_signature_index = cfs->get_u2(CHECK); | |
| 969 } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 970 runtime_visible_annotations_length = attribute_length; | |
| 971 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 972 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 973 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 974 } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 975 runtime_invisible_annotations_length = attribute_length; | |
| 976 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 977 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 978 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 979 } else { | |
| 980 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 981 } | |
| 982 } else { | |
| 983 cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes | |
| 984 } | |
| 985 } | |
| 986 | |
| 987 *constantvalue_index_addr = constantvalue_index; | |
| 988 *is_synthetic_addr = is_synthetic; | |
| 989 *generic_signature_index_addr = generic_signature_index; | |
| 990 *field_annotations = assemble_annotations(runtime_visible_annotations, | |
| 991 runtime_visible_annotations_length, | |
| 992 runtime_invisible_annotations, | |
| 993 runtime_invisible_annotations_length, | |
| 994 CHECK); | |
| 995 return; | |
| 996 } | |
| 997 | |
| 998 | |
| 999 // Field allocation types. Used for computing field offsets. | |
| 1000 | |
| 1001 enum FieldAllocationType { | |
| 1002 STATIC_OOP, // Oops | |
| 1003 STATIC_BYTE, // Boolean, Byte, char | |
| 1004 STATIC_SHORT, // shorts | |
| 1005 STATIC_WORD, // ints | |
| 1006 STATIC_DOUBLE, // long or double | |
| 1007 STATIC_ALIGNED_DOUBLE,// aligned long or double | |
| 1008 NONSTATIC_OOP, | |
| 1009 NONSTATIC_BYTE, | |
| 1010 NONSTATIC_SHORT, | |
| 1011 NONSTATIC_WORD, | |
| 1012 NONSTATIC_DOUBLE, | |
| 1013 NONSTATIC_ALIGNED_DOUBLE | |
| 1014 }; | |
| 1015 | |
| 1016 | |
| 1017 struct FieldAllocationCount { | |
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1018 unsigned int static_oop_count; |
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1019 unsigned int static_byte_count; |
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1020 unsigned int static_short_count; |
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1021 unsigned int static_word_count; |
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1022 unsigned int static_double_count; |
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1023 unsigned int nonstatic_oop_count; |
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1024 unsigned int nonstatic_byte_count; |
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1025 unsigned int nonstatic_short_count; |
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1026 unsigned int nonstatic_word_count; |
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1027 unsigned int nonstatic_double_count; |
| 0 | 1028 }; |
| 1029 | |
| 1030 typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface, | |
| 1031 struct FieldAllocationCount *fac, | |
| 1032 objArrayHandle* fields_annotations, TRAPS) { | |
| 1033 ClassFileStream* cfs = stream(); | |
| 1034 typeArrayHandle nullHandle; | |
| 1035 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 1036 u2 length = cfs->get_u2_fast(); | |
| 1037 // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index] | |
| 1038 typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle)); | |
| 1039 typeArrayHandle fields(THREAD, new_fields); | |
| 1040 | |
| 1041 int index = 0; | |
| 1042 typeArrayHandle field_annotations; | |
| 1043 for (int n = 0; n < length; n++) { | |
| 1044 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1045 | |
| 1046 AccessFlags access_flags; | |
| 1047 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; | |
| 1048 verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle)); | |
| 1049 access_flags.set_flags(flags); | |
| 1050 | |
| 1051 u2 name_index = cfs->get_u2_fast(); | |
| 1052 int cp_size = cp->length(); | |
| 1053 check_property( | |
| 1054 valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(), | |
| 1055 "Invalid constant pool index %u for field name in class file %s", | |
| 1056 name_index, CHECK_(nullHandle)); | |
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1057 Symbol* name = cp->symbol_at(name_index); |
| 0 | 1058 verify_legal_field_name(name, CHECK_(nullHandle)); |
| 1059 | |
| 1060 u2 signature_index = cfs->get_u2_fast(); | |
| 1061 check_property( | |
| 1062 valid_cp_range(signature_index, cp_size) && | |
| 1063 cp->tag_at(signature_index).is_utf8(), | |
| 1064 "Invalid constant pool index %u for field signature in class file %s", | |
| 1065 signature_index, CHECK_(nullHandle)); | |
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1066 Symbol* sig = cp->symbol_at(signature_index); |
| 0 | 1067 verify_legal_field_signature(name, sig, CHECK_(nullHandle)); |
| 1068 | |
| 1069 u2 constantvalue_index = 0; | |
| 1070 bool is_synthetic = false; | |
| 1071 u2 generic_signature_index = 0; | |
| 1072 bool is_static = access_flags.is_static(); | |
| 1073 | |
| 1074 u2 attributes_count = cfs->get_u2_fast(); | |
| 1075 if (attributes_count > 0) { | |
| 1076 parse_field_attributes(cp, attributes_count, is_static, signature_index, | |
| 1077 &constantvalue_index, &is_synthetic, | |
| 1078 &generic_signature_index, &field_annotations, | |
| 1079 CHECK_(nullHandle)); | |
| 1080 if (field_annotations.not_null()) { | |
| 1081 if (fields_annotations->is_null()) { | |
| 1082 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 1083 *fields_annotations = objArrayHandle(THREAD, md); | |
| 1084 } | |
| 1085 (*fields_annotations)->obj_at_put(n, field_annotations()); | |
| 1086 } | |
| 1087 if (is_synthetic) { | |
| 1088 access_flags.set_is_synthetic(); | |
| 1089 } | |
| 1090 } | |
| 1091 | |
| 1092 fields->short_at_put(index++, access_flags.as_short()); | |
| 1093 fields->short_at_put(index++, name_index); | |
| 1094 fields->short_at_put(index++, signature_index); | |
| 1095 fields->short_at_put(index++, constantvalue_index); | |
| 1096 | |
| 1097 // Remember how many oops we encountered and compute allocation type | |
| 1098 BasicType type = cp->basic_type_for_signature_at(signature_index); | |
| 1099 FieldAllocationType atype; | |
| 1100 if ( is_static ) { | |
| 1101 switch ( type ) { | |
| 1102 case T_BOOLEAN: | |
| 1103 case T_BYTE: | |
| 1104 fac->static_byte_count++; | |
| 1105 atype = STATIC_BYTE; | |
| 1106 break; | |
| 1107 case T_LONG: | |
| 1108 case T_DOUBLE: | |
| 1109 if (Universe::field_type_should_be_aligned(type)) { | |
| 1110 atype = STATIC_ALIGNED_DOUBLE; | |
| 1111 } else { | |
| 1112 atype = STATIC_DOUBLE; | |
| 1113 } | |
| 1114 fac->static_double_count++; | |
| 1115 break; | |
| 1116 case T_CHAR: | |
| 1117 case T_SHORT: | |
| 1118 fac->static_short_count++; | |
| 1119 atype = STATIC_SHORT; | |
| 1120 break; | |
| 1121 case T_FLOAT: | |
| 1122 case T_INT: | |
| 1123 fac->static_word_count++; | |
| 1124 atype = STATIC_WORD; | |
| 1125 break; | |
| 1126 case T_ARRAY: | |
| 1127 case T_OBJECT: | |
| 1128 fac->static_oop_count++; | |
| 1129 atype = STATIC_OOP; | |
| 1130 break; | |
| 1131 case T_ADDRESS: | |
| 1132 case T_VOID: | |
| 1133 default: | |
| 1134 assert(0, "bad field type"); | |
| 1135 } | |
| 1136 } else { | |
| 1137 switch ( type ) { | |
| 1138 case T_BOOLEAN: | |
| 1139 case T_BYTE: | |
| 1140 fac->nonstatic_byte_count++; | |
| 1141 atype = NONSTATIC_BYTE; | |
| 1142 break; | |
| 1143 case T_LONG: | |
| 1144 case T_DOUBLE: | |
| 1145 if (Universe::field_type_should_be_aligned(type)) { | |
| 1146 atype = NONSTATIC_ALIGNED_DOUBLE; | |
| 1147 } else { | |
| 1148 atype = NONSTATIC_DOUBLE; | |
| 1149 } | |
| 1150 fac->nonstatic_double_count++; | |
| 1151 break; | |
| 1152 case T_CHAR: | |
| 1153 case T_SHORT: | |
| 1154 fac->nonstatic_short_count++; | |
| 1155 atype = NONSTATIC_SHORT; | |
| 1156 break; | |
| 1157 case T_FLOAT: | |
| 1158 case T_INT: | |
| 1159 fac->nonstatic_word_count++; | |
| 1160 atype = NONSTATIC_WORD; | |
| 1161 break; | |
| 1162 case T_ARRAY: | |
| 1163 case T_OBJECT: | |
| 1164 fac->nonstatic_oop_count++; | |
| 1165 atype = NONSTATIC_OOP; | |
| 1166 break; | |
| 1167 case T_ADDRESS: | |
| 1168 case T_VOID: | |
| 1169 default: | |
| 1170 assert(0, "bad field type"); | |
| 1171 } | |
| 1172 } | |
| 1173 | |
| 1174 // The correct offset is computed later (all oop fields will be located together) | |
| 1175 // We temporarily store the allocation type in the offset field | |
| 1176 fields->short_at_put(index++, atype); | |
| 1177 fields->short_at_put(index++, 0); // Clear out high word of byte offset | |
| 1178 fields->short_at_put(index++, generic_signature_index); | |
| 1179 } | |
| 1180 | |
| 1181 if (_need_verify && length > 1) { | |
| 1182 // Check duplicated fields | |
| 1183 ResourceMark rm(THREAD); | |
| 1184 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1185 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 1186 initialize_hashtable(names_and_sigs); | |
| 1187 bool dup = false; | |
| 1188 { | |
| 1189 debug_only(No_Safepoint_Verifier nsv;) | |
| 1190 for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) { | |
| 1191 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); | |
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1192 Symbol* name = cp->symbol_at(name_index); |
| 0 | 1193 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); |
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1194 Symbol* sig = cp->symbol_at(sig_index); |
| 0 | 1195 // If no duplicates, add name/signature in hashtable names_and_sigs. |
| 1196 if (!put_after_lookup(name, sig, names_and_sigs)) { | |
| 1197 dup = true; | |
| 1198 break; | |
| 1199 } | |
| 1200 } | |
| 1201 } | |
| 1202 if (dup) { | |
| 1203 classfile_parse_error("Duplicate field name&signature in class file %s", | |
| 1204 CHECK_(nullHandle)); | |
| 1205 } | |
| 1206 } | |
| 1207 | |
| 1208 return fields; | |
| 1209 } | |
| 1210 | |
| 1211 | |
| 1212 static void copy_u2_with_conversion(u2* dest, u2* src, int length) { | |
| 1213 while (length-- > 0) { | |
| 1214 *dest++ = Bytes::get_Java_u2((u1*) (src++)); | |
| 1215 } | |
| 1216 } | |
| 1217 | |
| 1218 | |
| 1219 typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length, | |
| 1220 u4 exception_table_length, | |
| 1221 constantPoolHandle cp, | |
| 1222 TRAPS) { | |
| 1223 ClassFileStream* cfs = stream(); | |
| 1224 typeArrayHandle nullHandle; | |
| 1225 | |
| 1226 // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index] | |
| 1227 typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle)); | |
| 1228 typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh); | |
| 1229 | |
| 1230 int index = 0; | |
| 1231 cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index | |
| 1232 for (unsigned int i = 0; i < exception_table_length; i++) { | |
| 1233 u2 start_pc = cfs->get_u2_fast(); | |
| 1234 u2 end_pc = cfs->get_u2_fast(); | |
| 1235 u2 handler_pc = cfs->get_u2_fast(); | |
| 1236 u2 catch_type_index = cfs->get_u2_fast(); | |
| 1237 // Will check legal target after parsing code array in verifier. | |
| 1238 if (_need_verify) { | |
| 1239 guarantee_property((start_pc < end_pc) && (end_pc <= code_length), | |
| 1240 "Illegal exception table range in class file %s", CHECK_(nullHandle)); | |
| 1241 guarantee_property(handler_pc < code_length, | |
| 1242 "Illegal exception table handler in class file %s", CHECK_(nullHandle)); | |
| 1243 if (catch_type_index != 0) { | |
| 1244 guarantee_property(valid_cp_range(catch_type_index, cp->length()) && | |
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1245 is_klass_reference(cp, catch_type_index), |
| 0 | 1246 "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle)); |
| 1247 } | |
| 1248 } | |
| 1249 exception_handlers->int_at_put(index++, start_pc); | |
| 1250 exception_handlers->int_at_put(index++, end_pc); | |
| 1251 exception_handlers->int_at_put(index++, handler_pc); | |
| 1252 exception_handlers->int_at_put(index++, catch_type_index); | |
| 1253 } | |
| 1254 return exception_handlers; | |
| 1255 } | |
| 1256 | |
| 1257 void ClassFileParser::parse_linenumber_table( | |
| 1258 u4 code_attribute_length, u4 code_length, | |
| 1259 CompressedLineNumberWriteStream** write_stream, TRAPS) { | |
| 1260 ClassFileStream* cfs = stream(); | |
| 1261 unsigned int num_entries = cfs->get_u2(CHECK); | |
| 1262 | |
| 1263 // Each entry is a u2 start_pc, and a u2 line_number | |
| 1264 unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); | |
| 1265 | |
| 1266 // Verify line number attribute and table length | |
| 1267 check_property( | |
| 1268 code_attribute_length == sizeof(u2) + length_in_bytes, | |
| 1269 "LineNumberTable attribute has wrong length in class file %s", CHECK); | |
| 1270 | |
| 1271 cfs->guarantee_more(length_in_bytes, CHECK); | |
| 1272 | |
| 1273 if ((*write_stream) == NULL) { | |
| 1274 if (length_in_bytes > fixed_buffer_size) { | |
| 1275 (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); | |
| 1276 } else { | |
| 1277 (*write_stream) = new CompressedLineNumberWriteStream( | |
| 1278 linenumbertable_buffer, fixed_buffer_size); | |
| 1279 } | |
| 1280 } | |
| 1281 | |
| 1282 while (num_entries-- > 0) { | |
| 1283 u2 bci = cfs->get_u2_fast(); // start_pc | |
| 1284 u2 line = cfs->get_u2_fast(); // line_number | |
| 1285 guarantee_property(bci < code_length, | |
| 1286 "Invalid pc in LineNumberTable in class file %s", CHECK); | |
| 1287 (*write_stream)->write_pair(bci, line); | |
| 1288 } | |
| 1289 } | |
| 1290 | |
| 1291 | |
| 1292 // Class file LocalVariableTable elements. | |
| 1293 class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { | |
| 1294 public: | |
| 1295 u2 start_bci; | |
| 1296 u2 length; | |
| 1297 u2 name_cp_index; | |
| 1298 u2 descriptor_cp_index; | |
| 1299 u2 slot; | |
| 1300 }; | |
| 1301 | |
| 1302 | |
| 1303 class LVT_Hash: public CHeapObj { | |
| 1304 public: | |
| 1305 LocalVariableTableElement *_elem; // element | |
| 1306 LVT_Hash* _next; // Next entry in hash table | |
| 1307 }; | |
| 1308 | |
| 1309 unsigned int hash(LocalVariableTableElement *elem) { | |
| 1310 unsigned int raw_hash = elem->start_bci; | |
| 1311 | |
| 1312 raw_hash = elem->length + raw_hash * 37; | |
| 1313 raw_hash = elem->name_cp_index + raw_hash * 37; | |
| 1314 raw_hash = elem->slot + raw_hash * 37; | |
| 1315 | |
| 1316 return raw_hash % HASH_ROW_SIZE; | |
| 1317 } | |
| 1318 | |
| 1319 void initialize_hashtable(LVT_Hash** table) { | |
| 1320 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1321 table[i] = NULL; | |
| 1322 } | |
| 1323 } | |
| 1324 | |
| 1325 void clear_hashtable(LVT_Hash** table) { | |
| 1326 for (int i = 0; i < HASH_ROW_SIZE; i++) { | |
| 1327 LVT_Hash* current = table[i]; | |
| 1328 LVT_Hash* next; | |
| 1329 while (current != NULL) { | |
| 1330 next = current->_next; | |
| 1331 current->_next = NULL; | |
| 1332 delete(current); | |
| 1333 current = next; | |
| 1334 } | |
| 1335 table[i] = NULL; | |
| 1336 } | |
| 1337 } | |
| 1338 | |
| 1339 LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { | |
| 1340 LVT_Hash* entry = table[index]; | |
| 1341 | |
| 1342 /* | |
| 1343 * 3-tuple start_bci/length/slot has to be unique key, | |
| 1344 * so the following comparison seems to be redundant: | |
| 1345 * && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1346 */ | |
| 1347 while (entry != NULL) { | |
| 1348 if (elem->start_bci == entry->_elem->start_bci | |
| 1349 && elem->length == entry->_elem->length | |
| 1350 && elem->name_cp_index == entry->_elem->name_cp_index | |
| 1351 && elem->slot == entry->_elem->slot | |
| 1352 ) { | |
| 1353 return entry; | |
| 1354 } | |
| 1355 entry = entry->_next; | |
| 1356 } | |
| 1357 return NULL; | |
| 1358 } | |
| 1359 | |
| 1360 // Return false if the local variable is found in table. | |
| 1361 // Return true if no duplicate is found. | |
| 1362 // And local variable is added as a new entry in table. | |
| 1363 bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { | |
| 1364 // First lookup for duplicates | |
| 1365 int index = hash(elem); | |
| 1366 LVT_Hash* entry = LVT_lookup(elem, index, table); | |
| 1367 | |
| 1368 if (entry != NULL) { | |
| 1369 return false; | |
| 1370 } | |
| 1371 // No duplicate is found, allocate a new entry and fill it. | |
| 1372 if ((entry = new LVT_Hash()) == NULL) { | |
| 1373 return false; | |
| 1374 } | |
| 1375 entry->_elem = elem; | |
| 1376 | |
| 1377 // Insert into hash table | |
| 1378 entry->_next = table[index]; | |
| 1379 table[index] = entry; | |
| 1380 | |
| 1381 return true; | |
| 1382 } | |
| 1383 | |
| 1384 void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { | |
| 1385 lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); | |
| 1386 lvt->length = Bytes::get_Java_u2((u1*) &src->length); | |
| 1387 lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); | |
| 1388 lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); | |
| 1389 lvt->signature_cp_index = 0; | |
| 1390 lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); | |
| 1391 } | |
| 1392 | |
| 1393 // Function is used to parse both attributes: | |
| 1394 // LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) | |
| 1395 u2* ClassFileParser::parse_localvariable_table(u4 code_length, | |
| 1396 u2 max_locals, | |
| 1397 u4 code_attribute_length, | |
| 1398 constantPoolHandle cp, | |
| 1399 u2* localvariable_table_length, | |
| 1400 bool isLVTT, | |
| 1401 TRAPS) { | |
| 1402 ClassFileStream* cfs = stream(); | |
| 1403 const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; | |
| 1404 *localvariable_table_length = cfs->get_u2(CHECK_NULL); | |
| 1405 unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); | |
| 1406 // Verify local variable table attribute has right length | |
| 1407 if (_need_verify) { | |
| 1408 guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), | |
| 1409 "%s has wrong length in class file %s", tbl_name, CHECK_NULL); | |
| 1410 } | |
| 1411 u2* localvariable_table_start = cfs->get_u2_buffer(); | |
| 1412 assert(localvariable_table_start != NULL, "null local variable table"); | |
| 1413 if (!_need_verify) { | |
| 1414 cfs->skip_u2_fast(size); | |
| 1415 } else { | |
| 1416 cfs->guarantee_more(size * 2, CHECK_NULL); | |
| 1417 for(int i = 0; i < (*localvariable_table_length); i++) { | |
| 1418 u2 start_pc = cfs->get_u2_fast(); | |
| 1419 u2 length = cfs->get_u2_fast(); | |
| 1420 u2 name_index = cfs->get_u2_fast(); | |
| 1421 u2 descriptor_index = cfs->get_u2_fast(); | |
| 1422 u2 index = cfs->get_u2_fast(); | |
| 1423 // Assign to a u4 to avoid overflow | |
| 1424 u4 end_pc = (u4)start_pc + (u4)length; | |
| 1425 | |
| 1426 if (start_pc >= code_length) { | |
| 1427 classfile_parse_error( | |
| 1428 "Invalid start_pc %u in %s in class file %s", | |
| 1429 start_pc, tbl_name, CHECK_NULL); | |
| 1430 } | |
| 1431 if (end_pc > code_length) { | |
| 1432 classfile_parse_error( | |
| 1433 "Invalid length %u in %s in class file %s", | |
| 1434 length, tbl_name, CHECK_NULL); | |
| 1435 } | |
| 1436 int cp_size = cp->length(); | |
| 1437 guarantee_property( | |
| 1438 valid_cp_range(name_index, cp_size) && | |
| 1439 cp->tag_at(name_index).is_utf8(), | |
| 1440 "Name index %u in %s has bad constant type in class file %s", | |
| 1441 name_index, tbl_name, CHECK_NULL); | |
| 1442 guarantee_property( | |
| 1443 valid_cp_range(descriptor_index, cp_size) && | |
| 1444 cp->tag_at(descriptor_index).is_utf8(), | |
| 1445 "Signature index %u in %s has bad constant type in class file %s", | |
| 1446 descriptor_index, tbl_name, CHECK_NULL); | |
| 1447 | |
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1448 Symbol* name = cp->symbol_at(name_index); |
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1449 Symbol* sig = cp->symbol_at(descriptor_index); |
| 0 | 1450 verify_legal_field_name(name, CHECK_NULL); |
| 1451 u2 extra_slot = 0; | |
| 1452 if (!isLVTT) { | |
| 1453 verify_legal_field_signature(name, sig, CHECK_NULL); | |
| 1454 | |
| 1455 // 4894874: check special cases for double and long local variables | |
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1456 if (sig == vmSymbols::type_signature(T_DOUBLE) || |
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1457 sig == vmSymbols::type_signature(T_LONG)) { |
| 0 | 1458 extra_slot = 1; |
| 1459 } | |
| 1460 } | |
| 1461 guarantee_property((index + extra_slot) < max_locals, | |
| 1462 "Invalid index %u in %s in class file %s", | |
| 1463 index, tbl_name, CHECK_NULL); | |
| 1464 } | |
| 1465 } | |
| 1466 return localvariable_table_start; | |
| 1467 } | |
| 1468 | |
| 1469 | |
| 1470 void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, | |
| 1471 u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) { | |
| 1472 ClassFileStream* cfs = stream(); | |
| 1473 u2 index = 0; // index in the array with long/double occupying two slots | |
| 1474 u4 i1 = *u1_index; | |
| 1475 u4 i2 = *u2_index + 1; | |
| 1476 for(int i = 0; i < array_length; i++) { | |
| 1477 u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); | |
| 1478 index++; | |
| 1479 if (tag == ITEM_Long || tag == ITEM_Double) { | |
| 1480 index++; | |
| 1481 } else if (tag == ITEM_Object) { | |
| 1482 u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1483 guarantee_property(valid_cp_range(class_index, cp->length()) && | |
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1484 is_klass_reference(cp, class_index), |
| 0 | 1485 "Bad class index %u in StackMap in class file %s", |
| 1486 class_index, CHECK); | |
| 1487 } else if (tag == ITEM_Uninitialized) { | |
| 1488 u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); | |
| 1489 guarantee_property( | |
| 1490 offset < code_length, | |
| 1491 "Bad uninitialized type offset %u in StackMap in class file %s", | |
| 1492 offset, CHECK); | |
| 1493 } else { | |
| 1494 guarantee_property( | |
| 1495 tag <= (u1)ITEM_Uninitialized, | |
| 1496 "Unknown variable type %u in StackMap in class file %s", | |
| 1497 tag, CHECK); | |
| 1498 } | |
| 1499 } | |
| 1500 u2_array[*u2_index] = index; | |
| 1501 *u1_index = i1; | |
| 1502 *u2_index = i2; | |
| 1503 } | |
| 1504 | |
| 1505 typeArrayOop ClassFileParser::parse_stackmap_table( | |
| 1506 u4 code_attribute_length, TRAPS) { | |
| 1507 if (code_attribute_length == 0) | |
| 1508 return NULL; | |
| 1509 | |
| 1510 ClassFileStream* cfs = stream(); | |
| 1511 u1* stackmap_table_start = cfs->get_u1_buffer(); | |
| 1512 assert(stackmap_table_start != NULL, "null stackmap table"); | |
| 1513 | |
| 1514 // check code_attribute_length first | |
| 1515 stream()->skip_u1(code_attribute_length, CHECK_NULL); | |
| 1516 | |
| 1517 if (!_need_verify && !DumpSharedSpaces) { | |
| 1518 return NULL; | |
| 1519 } | |
| 1520 | |
| 1521 typeArrayOop stackmap_data = | |
| 1522 oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL); | |
| 1523 | |
| 1524 stackmap_data->set_length(code_attribute_length); | |
| 1525 memcpy((void*)stackmap_data->byte_at_addr(0), | |
| 1526 (void*)stackmap_table_start, code_attribute_length); | |
| 1527 return stackmap_data; | |
| 1528 } | |
| 1529 | |
| 1530 u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, | |
| 1531 u4 method_attribute_length, | |
| 1532 constantPoolHandle cp, TRAPS) { | |
| 1533 ClassFileStream* cfs = stream(); | |
| 1534 cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length | |
| 1535 *checked_exceptions_length = cfs->get_u2_fast(); | |
| 1536 unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1537 u2* checked_exceptions_start = cfs->get_u2_buffer(); | |
| 1538 assert(checked_exceptions_start != NULL, "null checked exceptions"); | |
| 1539 if (!_need_verify) { | |
| 1540 cfs->skip_u2_fast(size); | |
| 1541 } else { | |
| 1542 // Verify each value in the checked exception table | |
| 1543 u2 checked_exception; | |
| 1544 u2 len = *checked_exceptions_length; | |
| 1545 cfs->guarantee_more(2 * len, CHECK_NULL); | |
| 1546 for (int i = 0; i < len; i++) { | |
| 1547 checked_exception = cfs->get_u2_fast(); | |
| 1548 check_property( | |
| 1549 valid_cp_range(checked_exception, cp->length()) && | |
|
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1550 is_klass_reference(cp, checked_exception), |
| 0 | 1551 "Exception name has bad type at constant pool %u in class file %s", |
| 1552 checked_exception, CHECK_NULL); | |
| 1553 } | |
| 1554 } | |
| 1555 // check exceptions attribute length | |
| 1556 if (_need_verify) { | |
| 1557 guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + | |
| 1558 sizeof(u2) * size), | |
| 1559 "Exceptions attribute has wrong length in class file %s", CHECK_NULL); | |
| 1560 } | |
| 1561 return checked_exceptions_start; | |
| 1562 } | |
| 1563 | |
|
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1564 void ClassFileParser::throwIllegalSignature( |
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1565 const char* type, Symbol* name, Symbol* sig, TRAPS) { |
|
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1566 ResourceMark rm(THREAD); |
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1567 Exceptions::fthrow(THREAD_AND_LOCATION, |
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1568 vmSymbols::java_lang_ClassFormatError(), |
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1569 "%s \"%s\" in class %s has illegal signature \"%s\"", type, |
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1570 name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); |
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1571 } |
| 0 | 1572 |
| 1573 #define MAX_ARGS_SIZE 255 | |
| 1574 #define MAX_CODE_SIZE 65535 | |
| 1575 #define INITIAL_MAX_LVT_NUMBER 256 | |
| 1576 | |
| 1577 // Note: the parse_method below is big and clunky because all parsing of the code and exceptions | |
| 1578 // attribute is inlined. This is curbersome to avoid since we inline most of the parts in the | |
| 1579 // methodOop to save footprint, so we only know the size of the resulting methodOop when the | |
| 1580 // entire method attribute is parsed. | |
| 1581 // | |
| 1582 // The promoted_flags parameter is used to pass relevant access_flags | |
| 1583 // from the method back up to the containing klass. These flag values | |
| 1584 // are added to klass's access_flags. | |
| 1585 | |
| 1586 methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface, | |
| 1587 AccessFlags *promoted_flags, | |
| 1588 typeArrayHandle* method_annotations, | |
| 1589 typeArrayHandle* method_parameter_annotations, | |
| 1590 typeArrayHandle* method_default_annotations, | |
| 1591 TRAPS) { | |
| 1592 ClassFileStream* cfs = stream(); | |
| 1593 methodHandle nullHandle; | |
| 1594 ResourceMark rm(THREAD); | |
| 1595 // Parse fixed parts | |
| 1596 cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count | |
| 1597 | |
| 1598 int flags = cfs->get_u2_fast(); | |
| 1599 u2 name_index = cfs->get_u2_fast(); | |
| 1600 int cp_size = cp->length(); | |
| 1601 check_property( | |
| 1602 valid_cp_range(name_index, cp_size) && | |
| 1603 cp->tag_at(name_index).is_utf8(), | |
| 1604 "Illegal constant pool index %u for method name in class file %s", | |
| 1605 name_index, CHECK_(nullHandle)); | |
|
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1606 Symbol* name = cp->symbol_at(name_index); |
| 0 | 1607 verify_legal_method_name(name, CHECK_(nullHandle)); |
| 1608 | |
| 1609 u2 signature_index = cfs->get_u2_fast(); | |
| 1610 guarantee_property( | |
| 1611 valid_cp_range(signature_index, cp_size) && | |
| 1612 cp->tag_at(signature_index).is_utf8(), | |
| 1613 "Illegal constant pool index %u for method signature in class file %s", | |
| 1614 signature_index, CHECK_(nullHandle)); | |
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1615 Symbol* signature = cp->symbol_at(signature_index); |
| 0 | 1616 |
| 1617 AccessFlags access_flags; | |
| 1618 if (name == vmSymbols::class_initializer_name()) { | |
| 1619 // We ignore the access flags for a class initializer. (JVM Spec. p. 116) | |
| 1620 flags = JVM_ACC_STATIC; | |
| 1621 } else { | |
| 1622 verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); | |
| 1623 } | |
| 1624 | |
| 1625 int args_size = -1; // only used when _need_verify is true | |
| 1626 if (_need_verify) { | |
| 1627 args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + | |
| 1628 verify_legal_method_signature(name, signature, CHECK_(nullHandle)); | |
| 1629 if (args_size > MAX_ARGS_SIZE) { | |
| 1630 classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); | |
| 1631 } | |
| 1632 } | |
| 1633 | |
| 1634 access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); | |
| 1635 | |
| 1636 // Default values for code and exceptions attribute elements | |
| 1637 u2 max_stack = 0; | |
| 1638 u2 max_locals = 0; | |
| 1639 u4 code_length = 0; | |
| 1640 u1* code_start = 0; | |
| 1641 u2 exception_table_length = 0; | |
| 1642 typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array()); | |
| 1643 u2 checked_exceptions_length = 0; | |
| 1644 u2* checked_exceptions_start = NULL; | |
| 1645 CompressedLineNumberWriteStream* linenumber_table = NULL; | |
| 1646 int linenumber_table_length = 0; | |
| 1647 int total_lvt_length = 0; | |
| 1648 u2 lvt_cnt = 0; | |
| 1649 u2 lvtt_cnt = 0; | |
| 1650 bool lvt_allocated = false; | |
| 1651 u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1652 u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; | |
| 1653 u2* localvariable_table_length; | |
| 1654 u2** localvariable_table_start; | |
| 1655 u2* localvariable_type_table_length; | |
| 1656 u2** localvariable_type_table_start; | |
| 1657 bool parsed_code_attribute = false; | |
| 1658 bool parsed_checked_exceptions_attribute = false; | |
| 1659 bool parsed_stackmap_attribute = false; | |
| 1660 // stackmap attribute - JDK1.5 | |
| 1661 typeArrayHandle stackmap_data; | |
| 1662 u2 generic_signature_index = 0; | |
| 1663 u1* runtime_visible_annotations = NULL; | |
| 1664 int runtime_visible_annotations_length = 0; | |
| 1665 u1* runtime_invisible_annotations = NULL; | |
| 1666 int runtime_invisible_annotations_length = 0; | |
| 1667 u1* runtime_visible_parameter_annotations = NULL; | |
| 1668 int runtime_visible_parameter_annotations_length = 0; | |
| 1669 u1* runtime_invisible_parameter_annotations = NULL; | |
| 1670 int runtime_invisible_parameter_annotations_length = 0; | |
| 1671 u1* annotation_default = NULL; | |
| 1672 int annotation_default_length = 0; | |
| 1673 | |
| 1674 // Parse code and exceptions attribute | |
| 1675 u2 method_attributes_count = cfs->get_u2_fast(); | |
| 1676 while (method_attributes_count--) { | |
| 1677 cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length | |
| 1678 u2 method_attribute_name_index = cfs->get_u2_fast(); | |
| 1679 u4 method_attribute_length = cfs->get_u4_fast(); | |
| 1680 check_property( | |
| 1681 valid_cp_range(method_attribute_name_index, cp_size) && | |
| 1682 cp->tag_at(method_attribute_name_index).is_utf8(), | |
| 1683 "Invalid method attribute name index %u in class file %s", | |
| 1684 method_attribute_name_index, CHECK_(nullHandle)); | |
| 1685 | |
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1686 Symbol* method_attribute_name = cp->symbol_at(method_attribute_name_index); |
| 0 | 1687 if (method_attribute_name == vmSymbols::tag_code()) { |
| 1688 // Parse Code attribute | |
| 1689 if (_need_verify) { | |
| 1690 guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(), | |
| 1691 "Code attribute in native or abstract methods in class file %s", | |
| 1692 CHECK_(nullHandle)); | |
| 1693 } | |
| 1694 if (parsed_code_attribute) { | |
| 1695 classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); | |
| 1696 } | |
| 1697 parsed_code_attribute = true; | |
| 1698 | |
| 1699 // Stack size, locals size, and code size | |
| 1700 if (_major_version == 45 && _minor_version <= 2) { | |
| 1701 cfs->guarantee_more(4, CHECK_(nullHandle)); | |
| 1702 max_stack = cfs->get_u1_fast(); | |
| 1703 max_locals = cfs->get_u1_fast(); | |
| 1704 code_length = cfs->get_u2_fast(); | |
| 1705 } else { | |
| 1706 cfs->guarantee_more(8, CHECK_(nullHandle)); | |
| 1707 max_stack = cfs->get_u2_fast(); | |
| 1708 max_locals = cfs->get_u2_fast(); | |
| 1709 code_length = cfs->get_u4_fast(); | |
| 1710 } | |
| 1711 if (_need_verify) { | |
| 1712 guarantee_property(args_size <= max_locals, | |
| 1713 "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); | |
| 1714 guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, | |
| 1715 "Invalid method Code length %u in class file %s", | |
| 1716 code_length, CHECK_(nullHandle)); | |
| 1717 } | |
| 1718 // Code pointer | |
| 1719 code_start = cfs->get_u1_buffer(); | |
| 1720 assert(code_start != NULL, "null code start"); | |
| 1721 cfs->guarantee_more(code_length, CHECK_(nullHandle)); | |
| 1722 cfs->skip_u1_fast(code_length); | |
| 1723 | |
| 1724 // Exception handler table | |
| 1725 cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length | |
| 1726 exception_table_length = cfs->get_u2_fast(); | |
| 1727 if (exception_table_length > 0) { | |
| 1728 exception_handlers = | |
| 1729 parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle)); | |
| 1730 } | |
| 1731 | |
| 1732 // Parse additional attributes in code attribute | |
| 1733 cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count | |
| 1734 u2 code_attributes_count = cfs->get_u2_fast(); | |
|
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1735 |
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1736 unsigned int calculated_attribute_length = 0; |
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1737 |
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1738 if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { |
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1739 calculated_attribute_length = |
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1740 sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); |
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1741 } else { |
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1742 // max_stack, locals and length are smaller in pre-version 45.2 classes |
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1743 calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); |
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1744 } |
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1745 calculated_attribute_length += |
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1746 code_length + |
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1747 sizeof(exception_table_length) + |
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1748 sizeof(code_attributes_count) + |
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1749 exception_table_length * |
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1750 ( sizeof(u2) + // start_pc |
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1751 sizeof(u2) + // end_pc |
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1752 sizeof(u2) + // handler_pc |
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1753 sizeof(u2) ); // catch_type_index |
| 0 | 1754 |
| 1755 while (code_attributes_count--) { | |
| 1756 cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length | |
| 1757 u2 code_attribute_name_index = cfs->get_u2_fast(); | |
| 1758 u4 code_attribute_length = cfs->get_u4_fast(); | |
| 1759 calculated_attribute_length += code_attribute_length + | |
| 1760 sizeof(code_attribute_name_index) + | |
| 1761 sizeof(code_attribute_length); | |
| 1762 check_property(valid_cp_range(code_attribute_name_index, cp_size) && | |
| 1763 cp->tag_at(code_attribute_name_index).is_utf8(), | |
| 1764 "Invalid code attribute name index %u in class file %s", | |
| 1765 code_attribute_name_index, | |
| 1766 CHECK_(nullHandle)); | |
| 1767 if (LoadLineNumberTables && | |
| 1768 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { | |
| 1769 // Parse and compress line number table | |
| 1770 parse_linenumber_table(code_attribute_length, code_length, | |
| 1771 &linenumber_table, CHECK_(nullHandle)); | |
| 1772 | |
| 1773 } else if (LoadLocalVariableTables && | |
| 1774 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { | |
| 1775 // Parse local variable table | |
| 1776 if (!lvt_allocated) { | |
| 1777 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1778 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1779 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1780 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1781 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1782 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1783 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1784 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1785 lvt_allocated = true; | |
| 1786 } | |
| 1787 if (lvt_cnt == max_lvt_cnt) { | |
| 1788 max_lvt_cnt <<= 1; | |
| 1789 REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); | |
| 1790 REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); | |
| 1791 } | |
| 1792 localvariable_table_start[lvt_cnt] = | |
| 1793 parse_localvariable_table(code_length, | |
| 1794 max_locals, | |
| 1795 code_attribute_length, | |
| 1796 cp, | |
| 1797 &localvariable_table_length[lvt_cnt], | |
| 1798 false, // is not LVTT | |
| 1799 CHECK_(nullHandle)); | |
| 1800 total_lvt_length += localvariable_table_length[lvt_cnt]; | |
| 1801 lvt_cnt++; | |
| 1802 } else if (LoadLocalVariableTypeTables && | |
| 1803 _major_version >= JAVA_1_5_VERSION && | |
| 1804 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { | |
| 1805 if (!lvt_allocated) { | |
| 1806 localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1807 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1808 localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1809 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1810 localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1811 THREAD, u2, INITIAL_MAX_LVT_NUMBER); | |
| 1812 localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 1813 THREAD, u2*, INITIAL_MAX_LVT_NUMBER); | |
| 1814 lvt_allocated = true; | |
| 1815 } | |
| 1816 // Parse local variable type table | |
| 1817 if (lvtt_cnt == max_lvtt_cnt) { | |
| 1818 max_lvtt_cnt <<= 1; | |
| 1819 REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); | |
| 1820 REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); | |
| 1821 } | |
| 1822 localvariable_type_table_start[lvtt_cnt] = | |
| 1823 parse_localvariable_table(code_length, | |
| 1824 max_locals, | |
| 1825 code_attribute_length, | |
| 1826 cp, | |
| 1827 &localvariable_type_table_length[lvtt_cnt], | |
| 1828 true, // is LVTT | |
| 1829 CHECK_(nullHandle)); | |
| 1830 lvtt_cnt++; | |
| 1831 } else if (UseSplitVerifier && | |
| 1832 _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && | |
| 1833 cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { | |
| 1834 // Stack map is only needed by the new verifier in JDK1.5. | |
| 1835 if (parsed_stackmap_attribute) { | |
| 1836 classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); | |
| 1837 } | |
| 1838 typeArrayOop sm = | |
| 1839 parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); | |
| 1840 stackmap_data = typeArrayHandle(THREAD, sm); | |
| 1841 parsed_stackmap_attribute = true; | |
| 1842 } else { | |
| 1843 // Skip unknown attributes | |
| 1844 cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); | |
| 1845 } | |
| 1846 } | |
| 1847 // check method attribute length | |
| 1848 if (_need_verify) { | |
| 1849 guarantee_property(method_attribute_length == calculated_attribute_length, | |
| 1850 "Code segment has wrong length in class file %s", CHECK_(nullHandle)); | |
| 1851 } | |
| 1852 } else if (method_attribute_name == vmSymbols::tag_exceptions()) { | |
| 1853 // Parse Exceptions attribute | |
| 1854 if (parsed_checked_exceptions_attribute) { | |
| 1855 classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); | |
| 1856 } | |
| 1857 parsed_checked_exceptions_attribute = true; | |
| 1858 checked_exceptions_start = | |
| 1859 parse_checked_exceptions(&checked_exceptions_length, | |
| 1860 method_attribute_length, | |
| 1861 cp, CHECK_(nullHandle)); | |
| 1862 } else if (method_attribute_name == vmSymbols::tag_synthetic()) { | |
| 1863 if (method_attribute_length != 0) { | |
| 1864 classfile_parse_error( | |
| 1865 "Invalid Synthetic method attribute length %u in class file %s", | |
| 1866 method_attribute_length, CHECK_(nullHandle)); | |
| 1867 } | |
| 1868 // Should we check that there hasn't already been a synthetic attribute? | |
| 1869 access_flags.set_is_synthetic(); | |
| 1870 } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 | |
| 1871 if (method_attribute_length != 0) { | |
| 1872 classfile_parse_error( | |
| 1873 "Invalid Deprecated method attribute length %u in class file %s", | |
| 1874 method_attribute_length, CHECK_(nullHandle)); | |
| 1875 } | |
| 1876 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 1877 if (method_attribute_name == vmSymbols::tag_signature()) { | |
| 1878 if (method_attribute_length != 2) { | |
| 1879 classfile_parse_error( | |
| 1880 "Invalid Signature attribute length %u in class file %s", | |
| 1881 method_attribute_length, CHECK_(nullHandle)); | |
| 1882 } | |
| 1883 cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index | |
| 1884 generic_signature_index = cfs->get_u2_fast(); | |
| 1885 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { | |
| 1886 runtime_visible_annotations_length = method_attribute_length; | |
| 1887 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 1888 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 1889 cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); | |
| 1890 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 1891 runtime_invisible_annotations_length = method_attribute_length; | |
| 1892 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 1893 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 1894 cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle)); | |
| 1895 } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { | |
| 1896 runtime_visible_parameter_annotations_length = method_attribute_length; | |
| 1897 runtime_visible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1898 assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); | |
| 1899 cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1900 } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { | |
| 1901 runtime_invisible_parameter_annotations_length = method_attribute_length; | |
| 1902 runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); | |
| 1903 assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); | |
| 1904 cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle)); | |
| 1905 } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { | |
| 1906 annotation_default_length = method_attribute_length; | |
| 1907 annotation_default = cfs->get_u1_buffer(); | |
| 1908 assert(annotation_default != NULL, "null annotation default"); | |
| 1909 cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); | |
| 1910 } else { | |
| 1911 // Skip unknown attributes | |
| 1912 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1913 } | |
| 1914 } else { | |
| 1915 // Skip unknown attributes | |
| 1916 cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); | |
| 1917 } | |
| 1918 } | |
| 1919 | |
| 1920 if (linenumber_table != NULL) { | |
| 1921 linenumber_table->write_terminator(); | |
| 1922 linenumber_table_length = linenumber_table->position(); | |
| 1923 } | |
| 1924 | |
| 1925 // Make sure there's at least one Code attribute in non-native/non-abstract method | |
| 1926 if (_need_verify) { | |
| 1927 guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, | |
| 1928 "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); | |
| 1929 } | |
| 1930 | |
| 1931 // All sizing information for a methodOop is finally available, now create it | |
| 1932 methodOop m_oop = oopFactory::new_method( | |
| 1933 code_length, access_flags, linenumber_table_length, | |
|
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1934 total_lvt_length, checked_exceptions_length, |
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1935 methodOopDesc::IsSafeConc, CHECK_(nullHandle)); |
| 0 | 1936 methodHandle m (THREAD, m_oop); |
| 1937 | |
| 1938 ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize); | |
| 1939 | |
| 1940 // Fill in information from fixed part (access_flags already set) | |
| 1941 m->set_constants(cp()); | |
| 1942 m->set_name_index(name_index); | |
| 1943 m->set_signature_index(signature_index); | |
| 1944 m->set_generic_signature_index(generic_signature_index); | |
| 1945 #ifdef CC_INTERP | |
| 1946 // hmm is there a gc issue here?? | |
| 1947 ResultTypeFinder rtf(cp->symbol_at(signature_index)); | |
| 1948 m->set_result_index(rtf.type()); | |
| 1949 #endif | |
| 1950 | |
| 1951 if (args_size >= 0) { | |
| 1952 m->set_size_of_parameters(args_size); | |
| 1953 } else { | |
| 1954 m->compute_size_of_parameters(THREAD); | |
| 1955 } | |
| 1956 #ifdef ASSERT | |
| 1957 if (args_size >= 0) { | |
| 1958 m->compute_size_of_parameters(THREAD); | |
| 1959 assert(args_size == m->size_of_parameters(), ""); | |
| 1960 } | |
| 1961 #endif | |
| 1962 | |
| 1963 // Fill in code attribute information | |
| 1964 m->set_max_stack(max_stack); | |
| 1965 m->set_max_locals(max_locals); | |
| 1966 m->constMethod()->set_stackmap_data(stackmap_data()); | |
| 1967 | |
| 1968 /** | |
| 1969 * The exception_table field is the flag used to indicate | |
| 1970 * that the methodOop and it's associated constMethodOop are partially | |
| 1971 * initialized and thus are exempt from pre/post GC verification. Once | |
| 1972 * the field is set, the oops are considered fully initialized so make | |
| 1973 * sure that the oops can pass verification when this field is set. | |
| 1974 */ | |
| 1975 m->set_exception_table(exception_handlers()); | |
| 1976 | |
| 1977 // Copy byte codes | |
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1978 m->set_code(code_start); |
| 0 | 1979 |
| 1980 // Copy line number table | |
| 1981 if (linenumber_table != NULL) { | |
| 1982 memcpy(m->compressed_linenumber_table(), | |
| 1983 linenumber_table->buffer(), linenumber_table_length); | |
| 1984 } | |
| 1985 | |
| 1986 // Copy checked exceptions | |
| 1987 if (checked_exceptions_length > 0) { | |
| 1988 int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); | |
| 1989 copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); | |
| 1990 } | |
| 1991 | |
| 1992 /* Copy class file LVT's/LVTT's into the HotSpot internal LVT. | |
| 1993 * | |
| 1994 * Rules for LVT's and LVTT's are: | |
| 1995 * - There can be any number of LVT's and LVTT's. | |
| 1996 * - If there are n LVT's, it is the same as if there was just | |
| 1997 * one LVT containing all the entries from the n LVT's. | |
| 1998 * - There may be no more than one LVT entry per local variable. | |
| 1999 * Two LVT entries are 'equal' if these fields are the same: | |
| 2000 * start_pc, length, name, slot | |
| 2001 * - There may be no more than one LVTT entry per each LVT entry. | |
| 2002 * Each LVTT entry has to match some LVT entry. | |
| 2003 * - HotSpot internal LVT keeps natural ordering of class file LVT entries. | |
| 2004 */ | |
| 2005 if (total_lvt_length > 0) { | |
| 2006 int tbl_no, idx; | |
| 2007 | |
| 2008 promoted_flags->set_has_localvariable_table(); | |
| 2009 | |
| 2010 LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); | |
| 2011 initialize_hashtable(lvt_Hash); | |
| 2012 | |
| 2013 // To fill LocalVariableTable in | |
| 2014 Classfile_LVT_Element* cf_lvt; | |
| 2015 LocalVariableTableElement* lvt = m->localvariable_table_start(); | |
| 2016 | |
| 2017 for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { | |
| 2018 cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; | |
| 2019 for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { | |
| 2020 copy_lvt_element(&cf_lvt[idx], lvt); | |
| 2021 // If no duplicates, add LVT elem in hashtable lvt_Hash. | |
| 2022 if (LVT_put_after_lookup(lvt, lvt_Hash) == false | |
| 2023 && _need_verify | |
| 2024 && _major_version >= JAVA_1_5_VERSION ) { | |
| 2025 clear_hashtable(lvt_Hash); | |
| 2026 classfile_parse_error("Duplicated LocalVariableTable attribute " | |
| 2027 "entry for '%s' in class file %s", | |
| 2028 cp->symbol_at(lvt->name_cp_index)->as_utf8(), | |
| 2029 CHECK_(nullHandle)); | |
| 2030 } | |
| 2031 } | |
| 2032 } | |
| 2033 | |
| 2034 // To merge LocalVariableTable and LocalVariableTypeTable | |
| 2035 Classfile_LVT_Element* cf_lvtt; | |
| 2036 LocalVariableTableElement lvtt_elem; | |
| 2037 | |
| 2038 for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { | |
| 2039 cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; | |
| 2040 for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { | |
| 2041 copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); | |
| 2042 int index = hash(&lvtt_elem); | |
| 2043 LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); | |
| 2044 if (entry == NULL) { | |
| 2045 if (_need_verify) { | |
| 2046 clear_hashtable(lvt_Hash); | |
| 2047 classfile_parse_error("LVTT entry for '%s' in class file %s " | |
| 2048 "does not match any LVT entry", | |
| 2049 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 2050 CHECK_(nullHandle)); | |
| 2051 } | |
| 2052 } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { | |
| 2053 clear_hashtable(lvt_Hash); | |
| 2054 classfile_parse_error("Duplicated LocalVariableTypeTable attribute " | |
| 2055 "entry for '%s' in class file %s", | |
| 2056 cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), | |
| 2057 CHECK_(nullHandle)); | |
| 2058 } else { | |
| 2059 // to add generic signatures into LocalVariableTable | |
| 2060 entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; | |
| 2061 } | |
| 2062 } | |
| 2063 } | |
| 2064 clear_hashtable(lvt_Hash); | |
| 2065 } | |
| 2066 | |
| 2067 *method_annotations = assemble_annotations(runtime_visible_annotations, | |
| 2068 runtime_visible_annotations_length, | |
| 2069 runtime_invisible_annotations, | |
| 2070 runtime_invisible_annotations_length, | |
| 2071 CHECK_(nullHandle)); | |
| 2072 *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations, | |
| 2073 runtime_visible_parameter_annotations_length, | |
| 2074 runtime_invisible_parameter_annotations, | |
| 2075 runtime_invisible_parameter_annotations_length, | |
| 2076 CHECK_(nullHandle)); | |
| 2077 *method_default_annotations = assemble_annotations(annotation_default, | |
| 2078 annotation_default_length, | |
| 2079 NULL, | |
| 2080 0, | |
| 2081 CHECK_(nullHandle)); | |
| 2082 | |
|
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2083 if (name == vmSymbols::finalize_method_name() && |
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2084 signature == vmSymbols::void_method_signature()) { |
| 0 | 2085 if (m->is_empty_method()) { |
| 2086 _has_empty_finalizer = true; | |
| 2087 } else { | |
| 2088 _has_finalizer = true; | |
| 2089 } | |
| 2090 } | |
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2091 if (name == vmSymbols::object_initializer_name() && |
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2092 signature == vmSymbols::void_method_signature() && |
| 0 | 2093 m->is_vanilla_constructor()) { |
| 2094 _has_vanilla_constructor = true; | |
| 2095 } | |
| 2096 | |
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2097 if (EnableMethodHandles && (m->is_method_handle_invoke() || |
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2098 m->is_method_handle_adapter())) { |
| 710 | 2099 THROW_MSG_(vmSymbols::java_lang_VirtualMachineError(), |
| 2100 "Method handle invokers must be defined internally to the VM", nullHandle); | |
| 2101 } | |
| 2102 | |
| 0 | 2103 return m; |
| 2104 } | |
| 2105 | |
| 2106 | |
| 2107 // The promoted_flags parameter is used to pass relevant access_flags | |
| 2108 // from the methods back up to the containing klass. These flag values | |
| 2109 // are added to klass's access_flags. | |
| 2110 | |
| 2111 objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface, | |
| 2112 AccessFlags* promoted_flags, | |
| 2113 bool* has_final_method, | |
| 2114 objArrayOop* methods_annotations_oop, | |
| 2115 objArrayOop* methods_parameter_annotations_oop, | |
| 2116 objArrayOop* methods_default_annotations_oop, | |
| 2117 TRAPS) { | |
| 2118 ClassFileStream* cfs = stream(); | |
| 2119 objArrayHandle nullHandle; | |
| 2120 typeArrayHandle method_annotations; | |
| 2121 typeArrayHandle method_parameter_annotations; | |
| 2122 typeArrayHandle method_default_annotations; | |
| 2123 cfs->guarantee_more(2, CHECK_(nullHandle)); // length | |
| 2124 u2 length = cfs->get_u2_fast(); | |
| 2125 if (length == 0) { | |
| 2126 return objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 2127 } else { | |
| 2128 objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2129 objArrayHandle methods(THREAD, m); | |
| 2130 HandleMark hm(THREAD); | |
| 2131 objArrayHandle methods_annotations; | |
| 2132 objArrayHandle methods_parameter_annotations; | |
| 2133 objArrayHandle methods_default_annotations; | |
| 2134 for (int index = 0; index < length; index++) { | |
| 2135 methodHandle method = parse_method(cp, is_interface, | |
| 2136 promoted_flags, | |
| 2137 &method_annotations, | |
| 2138 &method_parameter_annotations, | |
| 2139 &method_default_annotations, | |
| 2140 CHECK_(nullHandle)); | |
| 2141 if (method->is_final()) { | |
| 2142 *has_final_method = true; | |
| 2143 } | |
| 2144 methods->obj_at_put(index, method()); | |
| 2145 if (method_annotations.not_null()) { | |
| 2146 if (methods_annotations.is_null()) { | |
| 2147 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2148 methods_annotations = objArrayHandle(THREAD, md); | |
| 2149 } | |
| 2150 methods_annotations->obj_at_put(index, method_annotations()); | |
| 2151 } | |
| 2152 if (method_parameter_annotations.not_null()) { | |
| 2153 if (methods_parameter_annotations.is_null()) { | |
| 2154 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2155 methods_parameter_annotations = objArrayHandle(THREAD, md); | |
| 2156 } | |
| 2157 methods_parameter_annotations->obj_at_put(index, method_parameter_annotations()); | |
| 2158 } | |
| 2159 if (method_default_annotations.not_null()) { | |
| 2160 if (methods_default_annotations.is_null()) { | |
| 2161 objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle)); | |
| 2162 methods_default_annotations = objArrayHandle(THREAD, md); | |
| 2163 } | |
| 2164 methods_default_annotations->obj_at_put(index, method_default_annotations()); | |
| 2165 } | |
| 2166 } | |
| 2167 if (_need_verify && length > 1) { | |
| 2168 // Check duplicated methods | |
| 2169 ResourceMark rm(THREAD); | |
| 2170 NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( | |
| 2171 THREAD, NameSigHash*, HASH_ROW_SIZE); | |
| 2172 initialize_hashtable(names_and_sigs); | |
| 2173 bool dup = false; | |
| 2174 { | |
| 2175 debug_only(No_Safepoint_Verifier nsv;) | |
| 2176 for (int i = 0; i < length; i++) { | |
| 2177 methodOop m = (methodOop)methods->obj_at(i); | |
| 2178 // If no duplicates, add name/signature in hashtable names_and_sigs. | |
| 2179 if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { | |
| 2180 dup = true; | |
| 2181 break; | |
| 2182 } | |
| 2183 } | |
| 2184 } | |
| 2185 if (dup) { | |
| 2186 classfile_parse_error("Duplicate method name&signature in class file %s", | |
| 2187 CHECK_(nullHandle)); | |
| 2188 } | |
| 2189 } | |
| 2190 | |
| 2191 *methods_annotations_oop = methods_annotations(); | |
| 2192 *methods_parameter_annotations_oop = methods_parameter_annotations(); | |
| 2193 *methods_default_annotations_oop = methods_default_annotations(); | |
| 2194 | |
| 2195 return methods; | |
| 2196 } | |
| 2197 } | |
| 2198 | |
| 2199 | |
| 2200 typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods, | |
| 2201 objArrayHandle methods_annotations, | |
| 2202 objArrayHandle methods_parameter_annotations, | |
| 2203 objArrayHandle methods_default_annotations, | |
| 2204 TRAPS) { | |
| 2205 typeArrayHandle nullHandle; | |
| 2206 int length = methods()->length(); | |
| 2207 // If JVMTI original method ordering is enabled we have to | |
| 2208 // remember the original class file ordering. | |
| 2209 // We temporarily use the vtable_index field in the methodOop to store the | |
| 2210 // class file index, so we can read in after calling qsort. | |
| 2211 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2212 for (int index = 0; index < length; index++) { | |
| 2213 methodOop m = methodOop(methods->obj_at(index)); | |
| 2214 assert(!m->valid_vtable_index(), "vtable index should not be set"); | |
| 2215 m->set_vtable_index(index); | |
| 2216 } | |
| 2217 } | |
| 2218 // Sort method array by ascending method name (for faster lookups & vtable construction) | |
|
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2219 // Note that the ordering is not alphabetical, see Symbol::fast_compare |
| 0 | 2220 methodOopDesc::sort_methods(methods(), |
| 2221 methods_annotations(), | |
| 2222 methods_parameter_annotations(), | |
| 2223 methods_default_annotations()); | |
| 2224 | |
| 2225 // If JVMTI original method ordering is enabled construct int array remembering the original ordering | |
| 2226 if (JvmtiExport::can_maintain_original_method_order()) { | |
| 2227 typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle)); | |
| 2228 typeArrayHandle method_ordering(THREAD, new_ordering); | |
| 2229 for (int index = 0; index < length; index++) { | |
| 2230 methodOop m = methodOop(methods->obj_at(index)); | |
| 2231 int old_index = m->vtable_index(); | |
| 2232 assert(old_index >= 0 && old_index < length, "invalid method index"); | |
| 2233 method_ordering->int_at_put(index, old_index); | |
| 2234 m->set_vtable_index(methodOopDesc::invalid_vtable_index); | |
| 2235 } | |
| 2236 return method_ordering; | |
| 2237 } else { | |
| 2238 return typeArrayHandle(THREAD, Universe::the_empty_int_array()); | |
| 2239 } | |
| 2240 } | |
| 2241 | |
| 2242 | |
| 2243 void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2244 ClassFileStream* cfs = stream(); | |
| 2245 cfs->guarantee_more(2, CHECK); // sourcefile_index | |
| 2246 u2 sourcefile_index = cfs->get_u2_fast(); | |
| 2247 check_property( | |
| 2248 valid_cp_range(sourcefile_index, cp->length()) && | |
| 2249 cp->tag_at(sourcefile_index).is_utf8(), | |
| 2250 "Invalid SourceFile attribute at constant pool index %u in class file %s", | |
| 2251 sourcefile_index, CHECK); | |
| 2252 k->set_source_file_name(cp->symbol_at(sourcefile_index)); | |
| 2253 } | |
| 2254 | |
| 2255 | |
| 2256 | |
| 2257 void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp, | |
| 2258 instanceKlassHandle k, | |
| 2259 int length, TRAPS) { | |
| 2260 ClassFileStream* cfs = stream(); | |
| 2261 u1* sde_buffer = cfs->get_u1_buffer(); | |
| 2262 assert(sde_buffer != NULL, "null sde buffer"); | |
| 2263 | |
| 2264 // Don't bother storing it if there is no way to retrieve it | |
| 2265 if (JvmtiExport::can_get_source_debug_extension()) { | |
| 2266 // Optimistically assume that only 1 byte UTF format is used | |
| 2267 // (common case) | |
|
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2268 TempNewSymbol sde_symbol = SymbolTable::new_symbol((const char*)sde_buffer, length, CHECK); |
| 0 | 2269 k->set_source_debug_extension(sde_symbol); |
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2270 // Note that set_source_debug_extension() increments the reference count |
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2271 // for its copy of the Symbol*, so use a TempNewSymbol here. |
| 0 | 2272 } |
| 2273 // Got utf8 string, set stream position forward | |
| 2274 cfs->skip_u1(length, CHECK); | |
| 2275 } | |
| 2276 | |
| 2277 | |
| 2278 // Inner classes can be static, private or protected (classic VM does this) | |
| 2279 #define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) | |
| 2280 | |
| 2281 // Return number of classes in the inner classes attribute table | |
| 2282 u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2283 ClassFileStream* cfs = stream(); | |
| 2284 cfs->guarantee_more(2, CHECK_0); // length | |
| 2285 u2 length = cfs->get_u2_fast(); | |
| 2286 | |
| 2287 // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags] | |
| 2288 typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0); | |
| 2289 typeArrayHandle inner_classes(THREAD, ic); | |
| 2290 int index = 0; | |
| 2291 int cp_size = cp->length(); | |
| 2292 cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 | |
| 2293 for (int n = 0; n < length; n++) { | |
| 2294 // Inner class index | |
| 2295 u2 inner_class_info_index = cfs->get_u2_fast(); | |
| 2296 check_property( | |
| 2297 inner_class_info_index == 0 || | |
| 2298 (valid_cp_range(inner_class_info_index, cp_size) && | |
|
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2299 is_klass_reference(cp, inner_class_info_index)), |
| 0 | 2300 "inner_class_info_index %u has bad constant type in class file %s", |
| 2301 inner_class_info_index, CHECK_0); | |
| 2302 // Outer class index | |
| 2303 u2 outer_class_info_index = cfs->get_u2_fast(); | |
| 2304 check_property( | |
| 2305 outer_class_info_index == 0 || | |
| 2306 (valid_cp_range(outer_class_info_index, cp_size) && | |
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2307 is_klass_reference(cp, outer_class_info_index)), |
| 0 | 2308 "outer_class_info_index %u has bad constant type in class file %s", |
| 2309 outer_class_info_index, CHECK_0); | |
| 2310 // Inner class name | |
| 2311 u2 inner_name_index = cfs->get_u2_fast(); | |
| 2312 check_property( | |
| 2313 inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) && | |
| 2314 cp->tag_at(inner_name_index).is_utf8()), | |
| 2315 "inner_name_index %u has bad constant type in class file %s", | |
| 2316 inner_name_index, CHECK_0); | |
| 2317 if (_need_verify) { | |
| 2318 guarantee_property(inner_class_info_index != outer_class_info_index, | |
| 2319 "Class is both outer and inner class in class file %s", CHECK_0); | |
| 2320 } | |
| 2321 // Access flags | |
| 2322 AccessFlags inner_access_flags; | |
| 2323 jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; | |
| 2324 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2325 // Set abstract bit for old class files for backward compatibility | |
| 2326 flags |= JVM_ACC_ABSTRACT; | |
| 2327 } | |
| 2328 verify_legal_class_modifiers(flags, CHECK_0); | |
| 2329 inner_access_flags.set_flags(flags); | |
| 2330 | |
| 2331 inner_classes->short_at_put(index++, inner_class_info_index); | |
| 2332 inner_classes->short_at_put(index++, outer_class_info_index); | |
| 2333 inner_classes->short_at_put(index++, inner_name_index); | |
| 2334 inner_classes->short_at_put(index++, inner_access_flags.as_short()); | |
| 2335 } | |
| 2336 | |
| 2337 // 4347400: make sure there's no duplicate entry in the classes array | |
| 2338 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2339 for(int i = 0; i < inner_classes->length(); i += 4) { | |
| 2340 for(int j = i + 4; j < inner_classes->length(); j += 4) { | |
| 2341 guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) || | |
| 2342 inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) || | |
| 2343 inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) || | |
| 2344 inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)), | |
| 2345 "Duplicate entry in InnerClasses in class file %s", | |
| 2346 CHECK_0); | |
| 2347 } | |
| 2348 } | |
| 2349 } | |
| 2350 | |
| 2351 // Update instanceKlass with inner class info. | |
| 2352 k->set_inner_classes(inner_classes()); | |
| 2353 return length; | |
| 2354 } | |
| 2355 | |
| 2356 void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2357 k->set_is_synthetic(); | |
| 2358 } | |
| 2359 | |
| 2360 void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { | |
| 2361 ClassFileStream* cfs = stream(); | |
| 2362 u2 signature_index = cfs->get_u2(CHECK); | |
| 2363 check_property( | |
| 2364 valid_cp_range(signature_index, cp->length()) && | |
| 2365 cp->tag_at(signature_index).is_utf8(), | |
| 2366 "Invalid constant pool index %u in Signature attribute in class file %s", | |
| 2367 signature_index, CHECK); | |
| 2368 k->set_generic_signature(cp->symbol_at(signature_index)); | |
| 2369 } | |
| 2370 | |
|
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2371 void ClassFileParser::parse_classfile_bootstrap_methods_attribute(constantPoolHandle cp, instanceKlassHandle k, |
|
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2372 u4 attribute_byte_length, TRAPS) { |
|
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|
2373 ClassFileStream* cfs = stream(); |
|
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2374 u1* current_start = cfs->current(); |
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|
2375 |
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|
2376 cfs->guarantee_more(2, CHECK); // length |
|
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2377 int attribute_array_length = cfs->get_u2_fast(); |
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2378 |
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|
2379 guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, |
|
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2380 "Short length on BootstrapMethods in class file %s", |
|
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|
2381 CHECK); |
|
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|
2382 |
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2383 // The attribute contains a counted array of counted tuples of shorts, |
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2384 // represending bootstrap specifiers: |
|
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2385 // length*{bootstrap_method_index, argument_count*{argument_index}} |
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2386 int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); |
|
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2387 // operand_count = number of shorts in attr, except for leading length |
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2388 |
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2389 // The attribute is copied into a short[] array. |
|
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2390 // The array begins with a series of short[2] pairs, one for each tuple. |
|
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2391 int index_size = (attribute_array_length * 2); |
|
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2392 |
|
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|
2393 typeArrayOop operands_oop = oopFactory::new_permanent_intArray(index_size + operand_count, CHECK); |
|
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|
2394 typeArrayHandle operands(THREAD, operands_oop); |
|
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|
2395 operands_oop = NULL; // tidy |
|
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|
2396 |
|
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|
2397 int operand_fill_index = index_size; |
|
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|
2398 int cp_size = cp->length(); |
|
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|
2399 |
|
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|
2400 for (int n = 0; n < attribute_array_length; n++) { |
|
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|
2401 // Store a 32-bit offset into the header of the operand array. |
|
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diff
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|
2402 assert(constantPoolOopDesc::operand_offset_at(operands(), n) == 0, ""); |
|
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diff
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|
2403 constantPoolOopDesc::operand_offset_at_put(operands(), n, operand_fill_index); |
|
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|
2404 |
|
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|
2405 // Read a bootstrap specifier. |
|
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|
2406 cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc |
|
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|
2407 u2 bootstrap_method_index = cfs->get_u2_fast(); |
|
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|
2408 u2 argument_count = cfs->get_u2_fast(); |
|
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|
2409 check_property( |
|
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|
2410 valid_cp_range(bootstrap_method_index, cp_size) && |
|
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|
2411 cp->tag_at(bootstrap_method_index).is_method_handle(), |
|
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|
2412 "bootstrap_method_index %u has bad constant type in class file %s", |
| 2085 | 2413 bootstrap_method_index, |
|
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2414 CHECK); |
|
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|
2415 operands->short_at_put(operand_fill_index++, bootstrap_method_index); |
|
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|
2416 operands->short_at_put(operand_fill_index++, argument_count); |
|
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|
2417 |
|
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|
2418 cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] |
|
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|
2419 for (int j = 0; j < argument_count; j++) { |
| 2085 | 2420 u2 argument_index = cfs->get_u2_fast(); |
|
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|
2421 check_property( |
| 2085 | 2422 valid_cp_range(argument_index, cp_size) && |
| 2423 cp->tag_at(argument_index).is_loadable_constant(), | |
|
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|
2424 "argument_index %u has bad constant type in class file %s", |
| 2085 | 2425 argument_index, |
|
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|
2426 CHECK); |
| 2085 | 2427 operands->short_at_put(operand_fill_index++, argument_index); |
|
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|
2428 } |
|
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diff
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|
2429 } |
|
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diff
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|
2430 |
|
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diff
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|
2431 assert(operand_fill_index == operands()->length(), "exact fill"); |
|
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diff
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|
2432 assert(constantPoolOopDesc::operand_array_length(operands()) == attribute_array_length, "correct decode"); |
|
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diff
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|
2433 |
|
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diff
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|
2434 u1* current_end = cfs->current(); |
|
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diff
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|
2435 guarantee_property(current_end == current_start + attribute_byte_length, |
|
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diff
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|
2436 "Bad length on BootstrapMethods in class file %s", |
|
dad31fc330cd
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jrose
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diff
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|
2437 CHECK); |
|
dad31fc330cd
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diff
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|
2438 |
|
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parents:
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diff
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|
2439 cp->set_operands(operands()); |
|
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jrose
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diff
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|
2440 } |
|
dad31fc330cd
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diff
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|
2441 |
|
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diff
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|
2442 |
| 0 | 2443 void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) { |
| 2444 ClassFileStream* cfs = stream(); | |
| 2445 // Set inner classes attribute to default sentinel | |
| 2446 k->set_inner_classes(Universe::the_empty_short_array()); | |
| 2447 cfs->guarantee_more(2, CHECK); // attributes_count | |
| 2448 u2 attributes_count = cfs->get_u2_fast(); | |
| 2449 bool parsed_sourcefile_attribute = false; | |
| 2450 bool parsed_innerclasses_attribute = false; | |
| 2451 bool parsed_enclosingmethod_attribute = false; | |
|
2011
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diff
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|
2452 bool parsed_bootstrap_methods_attribute = false; |
| 0 | 2453 u1* runtime_visible_annotations = NULL; |
| 2454 int runtime_visible_annotations_length = 0; | |
| 2455 u1* runtime_invisible_annotations = NULL; | |
| 2456 int runtime_invisible_annotations_length = 0; | |
| 2457 // Iterate over attributes | |
| 2458 while (attributes_count--) { | |
| 2459 cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length | |
| 2460 u2 attribute_name_index = cfs->get_u2_fast(); | |
| 2461 u4 attribute_length = cfs->get_u4_fast(); | |
| 2462 check_property( | |
| 2463 valid_cp_range(attribute_name_index, cp->length()) && | |
| 2464 cp->tag_at(attribute_name_index).is_utf8(), | |
| 2465 "Attribute name has bad constant pool index %u in class file %s", | |
| 2466 attribute_name_index, CHECK); | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
2467 Symbol* tag = cp->symbol_at(attribute_name_index); |
| 0 | 2468 if (tag == vmSymbols::tag_source_file()) { |
| 2469 // Check for SourceFile tag | |
| 2470 if (_need_verify) { | |
| 2471 guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); | |
| 2472 } | |
| 2473 if (parsed_sourcefile_attribute) { | |
| 2474 classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); | |
| 2475 } else { | |
| 2476 parsed_sourcefile_attribute = true; | |
| 2477 } | |
| 2478 parse_classfile_sourcefile_attribute(cp, k, CHECK); | |
| 2479 } else if (tag == vmSymbols::tag_source_debug_extension()) { | |
| 2480 // Check for SourceDebugExtension tag | |
| 2481 parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK); | |
| 2482 } else if (tag == vmSymbols::tag_inner_classes()) { | |
| 2483 // Check for InnerClasses tag | |
| 2484 if (parsed_innerclasses_attribute) { | |
| 2485 classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); | |
| 2486 } else { | |
| 2487 parsed_innerclasses_attribute = true; | |
| 2488 } | |
| 2489 u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK); | |
| 2490 if (_need_verify && _major_version >= JAVA_1_5_VERSION) { | |
| 2491 guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, | |
| 2492 "Wrong InnerClasses attribute length in class file %s", CHECK); | |
| 2493 } | |
| 2494 } else if (tag == vmSymbols::tag_synthetic()) { | |
| 2495 // Check for Synthetic tag | |
| 2496 // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec | |
| 2497 if (attribute_length != 0) { | |
| 2498 classfile_parse_error( | |
| 2499 "Invalid Synthetic classfile attribute length %u in class file %s", | |
| 2500 attribute_length, CHECK); | |
| 2501 } | |
| 2502 parse_classfile_synthetic_attribute(cp, k, CHECK); | |
| 2503 } else if (tag == vmSymbols::tag_deprecated()) { | |
| 2504 // Check for Deprecatd tag - 4276120 | |
| 2505 if (attribute_length != 0) { | |
| 2506 classfile_parse_error( | |
| 2507 "Invalid Deprecated classfile attribute length %u in class file %s", | |
| 2508 attribute_length, CHECK); | |
| 2509 } | |
| 2510 } else if (_major_version >= JAVA_1_5_VERSION) { | |
| 2511 if (tag == vmSymbols::tag_signature()) { | |
| 2512 if (attribute_length != 2) { | |
| 2513 classfile_parse_error( | |
| 2514 "Wrong Signature attribute length %u in class file %s", | |
| 2515 attribute_length, CHECK); | |
| 2516 } | |
| 2517 parse_classfile_signature_attribute(cp, k, CHECK); | |
| 2518 } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { | |
| 2519 runtime_visible_annotations_length = attribute_length; | |
| 2520 runtime_visible_annotations = cfs->get_u1_buffer(); | |
| 2521 assert(runtime_visible_annotations != NULL, "null visible annotations"); | |
| 2522 cfs->skip_u1(runtime_visible_annotations_length, CHECK); | |
| 2523 } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) { | |
| 2524 runtime_invisible_annotations_length = attribute_length; | |
| 2525 runtime_invisible_annotations = cfs->get_u1_buffer(); | |
| 2526 assert(runtime_invisible_annotations != NULL, "null invisible annotations"); | |
| 2527 cfs->skip_u1(runtime_invisible_annotations_length, CHECK); | |
| 2528 } else if (tag == vmSymbols::tag_enclosing_method()) { | |
| 2529 if (parsed_enclosingmethod_attribute) { | |
| 2530 classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); | |
| 2531 } else { | |
| 2532 parsed_enclosingmethod_attribute = true; | |
| 2533 } | |
| 2534 cfs->guarantee_more(4, CHECK); // class_index, method_index | |
| 2535 u2 class_index = cfs->get_u2_fast(); | |
| 2536 u2 method_index = cfs->get_u2_fast(); | |
| 2537 if (class_index == 0) { | |
| 2538 classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2539 } | |
| 2540 // Validate the constant pool indices and types | |
| 2541 if (!cp->is_within_bounds(class_index) || | |
|
431
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6653858: dynamic languages need to be able to load anonymous classes
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196
diff
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|
2542 !is_klass_reference(cp, class_index)) { |
| 0 | 2543 classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); |
| 2544 } | |
| 2545 if (method_index != 0 && | |
| 2546 (!cp->is_within_bounds(method_index) || | |
| 2547 !cp->tag_at(method_index).is_name_and_type())) { | |
| 2548 classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); | |
| 2549 } | |
| 2550 k->set_enclosing_method_indices(class_index, method_index); | |
|
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7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
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|
2551 } else if (tag == vmSymbols::tag_bootstrap_methods() && |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
changeset
|
2552 _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
changeset
|
2553 if (parsed_bootstrap_methods_attribute) |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
changeset
|
2554 classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); |
|
dad31fc330cd
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diff
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|
2555 parsed_bootstrap_methods_attribute = true; |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
changeset
|
2556 parse_classfile_bootstrap_methods_attribute(cp, k, attribute_length, CHECK); |
| 0 | 2557 } else { |
| 2558 // Unknown attribute | |
| 2559 cfs->skip_u1(attribute_length, CHECK); | |
| 2560 } | |
| 2561 } else { | |
| 2562 // Unknown attribute | |
| 2563 cfs->skip_u1(attribute_length, CHECK); | |
| 2564 } | |
| 2565 } | |
| 2566 typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations, | |
| 2567 runtime_visible_annotations_length, | |
| 2568 runtime_invisible_annotations, | |
| 2569 runtime_invisible_annotations_length, | |
| 2570 CHECK); | |
| 2571 k->set_class_annotations(annotations()); | |
|
2011
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7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
changeset
|
2572 |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
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|
2573 if (_max_bootstrap_specifier_index >= 0) { |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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diff
changeset
|
2574 guarantee_property(parsed_bootstrap_methods_attribute, |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
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diff
changeset
|
2575 "Missing BootstrapMethods attribute in class file %s", CHECK); |
|
dad31fc330cd
7001379: bootstrap method data needs to be moved from constant pool to a classfile attribute
jrose
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diff
changeset
|
2576 } |
| 0 | 2577 } |
| 2578 | |
| 2579 | |
| 2580 typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, | |
| 2581 int runtime_visible_annotations_length, | |
| 2582 u1* runtime_invisible_annotations, | |
| 2583 int runtime_invisible_annotations_length, TRAPS) { | |
| 2584 typeArrayHandle annotations; | |
| 2585 if (runtime_visible_annotations != NULL || | |
| 2586 runtime_invisible_annotations != NULL) { | |
| 2587 typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length + | |
| 2588 runtime_invisible_annotations_length, CHECK_(annotations)); | |
| 2589 annotations = typeArrayHandle(THREAD, anno); | |
| 2590 if (runtime_visible_annotations != NULL) { | |
| 2591 memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length); | |
| 2592 } | |
| 2593 if (runtime_invisible_annotations != NULL) { | |
| 2594 memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length); | |
| 2595 } | |
| 2596 } | |
| 2597 return annotations; | |
| 2598 } | |
| 2599 | |
| 2600 | |
| 2601 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { | |
| 2602 KlassHandle h_k (THREAD, fd->field_holder()); | |
| 2603 assert(h_k.not_null() && fd->is_static(), "just checking"); | |
| 2604 if (fd->has_initial_value()) { | |
| 2605 BasicType t = fd->field_type(); | |
| 2606 switch (t) { | |
| 2607 case T_BYTE: | |
| 2608 h_k()->byte_field_put(fd->offset(), fd->int_initial_value()); | |
| 2609 break; | |
| 2610 case T_BOOLEAN: | |
| 2611 h_k()->bool_field_put(fd->offset(), fd->int_initial_value()); | |
| 2612 break; | |
| 2613 case T_CHAR: | |
| 2614 h_k()->char_field_put(fd->offset(), fd->int_initial_value()); | |
| 2615 break; | |
| 2616 case T_SHORT: | |
| 2617 h_k()->short_field_put(fd->offset(), fd->int_initial_value()); | |
| 2618 break; | |
| 2619 case T_INT: | |
| 2620 h_k()->int_field_put(fd->offset(), fd->int_initial_value()); | |
| 2621 break; | |
| 2622 case T_FLOAT: | |
| 2623 h_k()->float_field_put(fd->offset(), fd->float_initial_value()); | |
| 2624 break; | |
| 2625 case T_DOUBLE: | |
| 2626 h_k()->double_field_put(fd->offset(), fd->double_initial_value()); | |
| 2627 break; | |
| 2628 case T_LONG: | |
| 2629 h_k()->long_field_put(fd->offset(), fd->long_initial_value()); | |
| 2630 break; | |
| 2631 case T_OBJECT: | |
| 2632 { | |
| 2633 #ifdef ASSERT | |
|
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6990754: Use native memory and reference counting to implement SymbolTable
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diff
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|
2634 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); |
| 0 | 2635 assert(fd->signature() == sym, "just checking"); |
| 2636 #endif | |
| 2637 oop string = fd->string_initial_value(CHECK); | |
| 2638 h_k()->obj_field_put(fd->offset(), string); | |
| 2639 } | |
| 2640 break; | |
| 2641 default: | |
| 2642 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), | |
| 2643 "Illegal ConstantValue attribute in class file"); | |
| 2644 } | |
| 2645 } | |
| 2646 } | |
| 2647 | |
| 2648 | |
| 2649 void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr, | |
| 2650 constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2651 // This code is for compatibility with earlier jdk's that do not | |
| 2652 // have the "discovered" field in java.lang.ref.Reference. For 1.5 | |
| 2653 // the check for the "discovered" field should issue a warning if | |
| 2654 // the field is not found. For 1.6 this code should be issue a | |
| 2655 // fatal error if the "discovered" field is not found. | |
| 2656 // | |
| 2657 // Increment fac.nonstatic_oop_count so that the start of the | |
| 2658 // next type of non-static oops leaves room for the fake oop. | |
| 2659 // Do not increment next_nonstatic_oop_offset so that the | |
| 2660 // fake oop is place after the java.lang.ref.Reference oop | |
| 2661 // fields. | |
| 2662 // | |
| 2663 // Check the fields in java.lang.ref.Reference for the "discovered" | |
| 2664 // field. If it is not present, artifically create a field for it. | |
| 2665 // This allows this VM to run on early JDK where the field is not | |
| 2666 // present. | |
| 2667 int reference_sig_index = 0; | |
| 2668 int reference_name_index = 0; | |
| 2669 int reference_index = 0; | |
| 2670 int extra = java_lang_ref_Reference::number_of_fake_oop_fields; | |
| 2671 const int n = (*fields_ptr)()->length(); | |
| 2672 for (int i = 0; i < n; i += instanceKlass::next_offset ) { | |
| 2673 int name_index = | |
| 2674 (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset); | |
| 2675 int sig_index = | |
| 2676 (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset); | |
|
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|
2677 Symbol* f_name = cp->symbol_at(name_index); |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
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|
2678 Symbol* f_sig = cp->symbol_at(sig_index); |
| 0 | 2679 if (f_sig == vmSymbols::reference_signature() && reference_index == 0) { |
| 2680 // Save the index for reference signature for later use. | |
| 2681 // The fake discovered field does not entries in the | |
| 2682 // constant pool so the index for its signature cannot | |
| 2683 // be extracted from the constant pool. It will need | |
| 2684 // later, however. It's signature is vmSymbols::reference_signature() | |
| 2685 // so same an index for that signature. | |
| 2686 reference_sig_index = sig_index; | |
| 2687 reference_name_index = name_index; | |
| 2688 reference_index = i; | |
| 2689 } | |
| 2690 if (f_name == vmSymbols::reference_discovered_name() && | |
| 2691 f_sig == vmSymbols::reference_signature()) { | |
| 2692 // The values below are fake but will force extra | |
| 2693 // non-static oop fields and a corresponding non-static | |
| 2694 // oop map block to be allocated. | |
| 2695 extra = 0; | |
| 2696 break; | |
| 2697 } | |
| 2698 } | |
| 2699 if (extra != 0) { | |
| 2700 fac_ptr->nonstatic_oop_count += extra; | |
| 2701 // Add the additional entry to "fields" so that the klass | |
| 2702 // contains the "discoverd" field and the field will be initialized | |
| 2703 // in instances of the object. | |
| 2704 int fields_with_fix_length = (*fields_ptr)()->length() + | |
| 2705 instanceKlass::next_offset; | |
| 2706 typeArrayOop ff = oopFactory::new_permanent_shortArray( | |
| 2707 fields_with_fix_length, CHECK); | |
| 2708 typeArrayHandle fields_with_fix(THREAD, ff); | |
| 2709 | |
| 2710 // Take everything from the original but the length. | |
| 2711 for (int idx = 0; idx < (*fields_ptr)->length(); idx++) { | |
| 2712 fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx)); | |
| 2713 } | |
| 2714 | |
| 2715 // Add the fake field at the end. | |
| 2716 int i = (*fields_ptr)->length(); | |
| 2717 // There is no name index for the fake "discovered" field nor | |
| 2718 // signature but a signature is needed so that the field will | |
| 2719 // be properly initialized. Use one found for | |
| 2720 // one of the other reference fields. Be sure the index for the | |
| 2721 // name is 0. In fieldDescriptor::initialize() the index of the | |
| 2722 // name is checked. That check is by passed for the last nonstatic | |
| 2723 // oop field in a java.lang.ref.Reference which is assumed to be | |
| 2724 // this artificial "discovered" field. An assertion checks that | |
| 2725 // the name index is 0. | |
| 2726 assert(reference_index != 0, "Missing signature for reference"); | |
| 2727 | |
| 2728 int j; | |
| 2729 for (j = 0; j < instanceKlass::next_offset; j++) { | |
| 2730 fields_with_fix->ushort_at_put(i + j, | |
| 2731 (*fields_ptr)->ushort_at(reference_index +j)); | |
| 2732 } | |
| 2733 // Clear the public access flag and set the private access flag. | |
| 2734 short flags; | |
| 2735 flags = | |
| 2736 fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset); | |
| 2737 assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set"); | |
| 2738 flags = flags & (~JVM_ACC_PUBLIC); | |
| 2739 flags = flags | JVM_ACC_PRIVATE; | |
| 2740 AccessFlags access_flags; | |
| 2741 access_flags.set_flags(flags); | |
| 2742 assert(!access_flags.is_public(), "Failed to clear public flag"); | |
| 2743 assert(access_flags.is_private(), "Failed to set private flag"); | |
| 2744 fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset, | |
| 2745 flags); | |
| 2746 | |
| 2747 assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset) | |
| 2748 == reference_name_index, "The fake reference name is incorrect"); | |
| 2749 assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset) | |
| 2750 == reference_sig_index, "The fake reference signature is incorrect"); | |
| 2751 // The type of the field is stored in the low_offset entry during | |
| 2752 // parsing. | |
| 2753 assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) == | |
| 2754 NONSTATIC_OOP, "The fake reference type is incorrect"); | |
| 2755 | |
| 2756 // "fields" is allocated in the permanent generation. Disgard | |
| 2757 // it and let it be collected. | |
| 2758 (*fields_ptr) = fields_with_fix; | |
| 2759 } | |
| 2760 return; | |
| 2761 } | |
| 2762 | |
| 2763 | |
| 2764 void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr, | |
| 2765 FieldAllocationCount *fac_ptr, TRAPS) { | |
| 2766 // Add fake fields for java.lang.Class instances | |
| 2767 // | |
| 2768 // This is not particularly nice. We should consider adding a | |
| 2769 // private transient object field at the Java level to | |
| 2770 // java.lang.Class. Alternatively we could add a subclass of | |
| 2771 // instanceKlass which provides an accessor and size computer for | |
| 2772 // this field, but that appears to be more code than this hack. | |
| 2773 // | |
| 2774 // NOTE that we wedge these in at the beginning rather than the | |
| 2775 // end of the object because the Class layout changed between JDK | |
| 2776 // 1.3 and JDK 1.4 with the new reflection implementation; some | |
| 2777 // nonstatic oop fields were added at the Java level. The offsets | |
| 2778 // of these fake fields can't change between these two JDK | |
| 2779 // versions because when the offsets are computed at bootstrap | |
| 2780 // time we don't know yet which version of the JDK we're running in. | |
| 2781 | |
| 2782 // The values below are fake but will force two non-static oop fields and | |
| 2783 // a corresponding non-static oop map block to be allocated. | |
| 2784 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
| 2785 fac_ptr->nonstatic_oop_count += extra; | |
| 2786 } | |
| 2787 | |
| 2788 | |
| 2789 void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) { | |
| 2790 // Cause the extra fake fields in java.lang.Class to show up before | |
| 2791 // the Java fields for layout compatibility between 1.3 and 1.4 | |
| 2792 // Incrementing next_nonstatic_oop_offset here advances the | |
| 2793 // location where the real java fields are placed. | |
| 2794 const int extra = java_lang_Class::number_of_fake_oop_fields; | |
|
113
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6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
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92
diff
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|
2795 (*next_nonstatic_oop_offset_ptr) += (extra * heapOopSize); |
| 0 | 2796 } |
| 2797 | |
| 2798 | |
| 710 | 2799 // Force MethodHandle.vmentry to be an unmanaged pointer. |
| 2800 // There is no way for a classfile to express this, so we must help it. | |
| 2801 void ClassFileParser::java_dyn_MethodHandle_fix_pre(constantPoolHandle cp, | |
|
1909
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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diff
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|
2802 typeArrayHandle fields, |
| 710 | 2803 FieldAllocationCount *fac_ptr, |
| 2804 TRAPS) { | |
| 2805 // Add fake fields for java.dyn.MethodHandle instances | |
| 2806 // | |
| 2807 // This is not particularly nice, but since there is no way to express | |
| 2808 // a native wordSize field in Java, we must do it at this level. | |
| 2809 | |
| 2810 if (!EnableMethodHandles) return; | |
| 2811 | |
| 2812 int word_sig_index = 0; | |
| 2813 const int cp_size = cp->length(); | |
| 2814 for (int index = 1; index < cp_size; index++) { | |
| 2815 if (cp->tag_at(index).is_utf8() && | |
| 2816 cp->symbol_at(index) == vmSymbols::machine_word_signature()) { | |
| 2817 word_sig_index = index; | |
| 2818 break; | |
| 2819 } | |
| 2820 } | |
| 2821 | |
| 2822 if (word_sig_index == 0) | |
| 2823 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2824 "missing I or J signature (for vmentry) in java.dyn.MethodHandle"); | |
| 2825 | |
|
1909
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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diff
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|
2826 // Find vmentry field and change the signature. |
| 710 | 2827 bool found_vmentry = false; |
|
1909
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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|
2828 for (int i = 0; i < fields->length(); i += instanceKlass::next_offset) { |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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|
2829 int name_index = fields->ushort_at(i + instanceKlass::name_index_offset); |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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|
2830 int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset); |
|
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|
2831 int acc_flags = fields->ushort_at(i + instanceKlass::access_flags_offset); |
|
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2832 Symbol* f_name = cp->symbol_at(name_index); |
|
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|
2833 Symbol* f_sig = cp->symbol_at(sig_index); |
|
1909
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2834 if (f_name == vmSymbols::vmentry_name() && (acc_flags & JVM_ACC_STATIC) == 0) { |
|
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2835 if (f_sig == vmSymbols::machine_word_signature()) { |
|
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|
2836 // If the signature of vmentry is already changed, we're done. |
|
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diff
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|
2837 found_vmentry = true; |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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|
2838 break; |
|
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diff
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|
2839 } |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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diff
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|
2840 else if (f_sig == vmSymbols::byte_signature()) { |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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diff
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|
2841 // Adjust the field type from byte to an unmanaged pointer. |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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diff
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|
2842 assert(fac_ptr->nonstatic_byte_count > 0, ""); |
|
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|
2843 fac_ptr->nonstatic_byte_count -= 1; |
|
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|
2844 |
|
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|
2845 fields->ushort_at_put(i + instanceKlass::signature_index_offset, word_sig_index); |
|
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|
2846 assert(wordSize == longSize || wordSize == jintSize, "ILP32 or LP64"); |
|
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1847
diff
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|
2847 if (wordSize == longSize) fac_ptr->nonstatic_double_count += 1; |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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1847
diff
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|
2848 else fac_ptr->nonstatic_word_count += 1; |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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|
2849 |
|
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diff
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|
2850 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset); |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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diff
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|
2851 assert(atype == NONSTATIC_BYTE, ""); |
|
d2e35ffae982
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1847
diff
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|
2852 FieldAllocationType new_atype = (wordSize == longSize) ? NONSTATIC_DOUBLE : NONSTATIC_WORD; |
|
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1847
diff
changeset
|
2853 fields->ushort_at_put(i + instanceKlass::low_offset, new_atype); |
|
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1847
diff
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|
2854 |
|
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6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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1847
diff
changeset
|
2855 found_vmentry = true; |
|
d2e35ffae982
6994630: java/lang/instrument/IsModifiableClassAgent.java fails with -XX:+EnableInvokeDynamic
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1847
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changeset
|
2856 break; |
|
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diff
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|
2857 } |
| 710 | 2858 } |
| 2859 } | |
| 2860 | |
| 2861 if (!found_vmentry) | |
| 2862 THROW_MSG(vmSymbols::java_lang_VirtualMachineError(), | |
| 2863 "missing vmentry byte field in java.dyn.MethodHandle"); | |
| 2864 } | |
| 2865 | |
| 2866 | |
|
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|
2867 instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name, |
| 0 | 2868 Handle class_loader, |
| 2869 Handle protection_domain, | |
| 710 | 2870 KlassHandle host_klass, |
|
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|
2871 GrowableArray<Handle>* cp_patches, |
|
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|
2872 TempNewSymbol& parsed_name, |
|
973
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|
2873 bool verify, |
| 0 | 2874 TRAPS) { |
| 2875 // So that JVMTI can cache class file in the state before retransformable agents | |
| 2876 // have modified it | |
| 2877 unsigned char *cached_class_file_bytes = NULL; | |
| 2878 jint cached_class_file_length; | |
| 2879 | |
| 2880 ClassFileStream* cfs = stream(); | |
| 2881 // Timing | |
|
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|
2882 assert(THREAD->is_Java_thread(), "must be a JavaThread"); |
|
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|
2883 JavaThread* jt = (JavaThread*) THREAD; |
|
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|
2884 |
|
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|
2885 PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(), |
|
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|
2886 ClassLoader::perf_class_parse_selftime(), |
|
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|
2887 NULL, |
|
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diff
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|
2888 jt->get_thread_stat()->perf_recursion_counts_addr(), |
|
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|
2889 jt->get_thread_stat()->perf_timers_addr(), |
|
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|
2890 PerfClassTraceTime::PARSE_CLASS); |
| 0 | 2891 |
| 2892 _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false; | |
|
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|
2893 _max_bootstrap_specifier_index = -1; |
| 0 | 2894 |
| 2895 if (JvmtiExport::should_post_class_file_load_hook()) { | |
| 2896 unsigned char* ptr = cfs->buffer(); | |
| 2897 unsigned char* end_ptr = cfs->buffer() + cfs->length(); | |
| 2898 | |
| 2899 JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain, | |
| 2900 &ptr, &end_ptr, | |
| 2901 &cached_class_file_bytes, | |
| 2902 &cached_class_file_length); | |
| 2903 | |
| 2904 if (ptr != cfs->buffer()) { | |
| 2905 // JVMTI agent has modified class file data. | |
| 2906 // Set new class file stream using JVMTI agent modified | |
| 2907 // class file data. | |
| 2908 cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); | |
| 2909 set_stream(cfs); | |
| 2910 } | |
| 2911 } | |
| 2912 | |
| 710 | 2913 _host_klass = host_klass; |
|
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|
2914 _cp_patches = cp_patches; |
| 0 | 2915 |
| 2916 instanceKlassHandle nullHandle; | |
| 2917 | |
| 2918 // Figure out whether we can skip format checking (matching classic VM behavior) | |
|
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|
2919 _need_verify = Verifier::should_verify_for(class_loader(), verify); |
| 0 | 2920 |
| 2921 // Set the verify flag in stream | |
| 2922 cfs->set_verify(_need_verify); | |
| 2923 | |
| 2924 // Save the class file name for easier error message printing. | |
|
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|
2925 _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name(); |
| 0 | 2926 |
| 2927 cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor | |
| 2928 // Magic value | |
| 2929 u4 magic = cfs->get_u4_fast(); | |
| 2930 guarantee_property(magic == JAVA_CLASSFILE_MAGIC, | |
| 2931 "Incompatible magic value %u in class file %s", | |
| 2932 magic, CHECK_(nullHandle)); | |
| 2933 | |
| 2934 // Version numbers | |
| 2935 u2 minor_version = cfs->get_u2_fast(); | |
| 2936 u2 major_version = cfs->get_u2_fast(); | |
| 2937 | |
| 2938 // Check version numbers - we check this even with verifier off | |
| 2939 if (!is_supported_version(major_version, minor_version)) { | |
|
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|
2940 if (name == NULL) { |
| 0 | 2941 Exceptions::fthrow( |
| 2942 THREAD_AND_LOCATION, | |
|
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|
2943 vmSymbols::java_lang_UnsupportedClassVersionError(), |
| 0 | 2944 "Unsupported major.minor version %u.%u", |
| 2945 major_version, | |
| 2946 minor_version); | |
| 2947 } else { | |
| 2948 ResourceMark rm(THREAD); | |
| 2949 Exceptions::fthrow( | |
| 2950 THREAD_AND_LOCATION, | |
|
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|
2951 vmSymbols::java_lang_UnsupportedClassVersionError(), |
| 0 | 2952 "%s : Unsupported major.minor version %u.%u", |
| 2953 name->as_C_string(), | |
| 2954 major_version, | |
| 2955 minor_version); | |
| 2956 } | |
| 2957 return nullHandle; | |
| 2958 } | |
| 2959 | |
| 2960 _major_version = major_version; | |
| 2961 _minor_version = minor_version; | |
| 2962 | |
| 2963 | |
| 2964 // Check if verification needs to be relaxed for this class file | |
| 2965 // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) | |
| 2966 _relax_verify = Verifier::relax_verify_for(class_loader()); | |
| 2967 | |
| 2968 // Constant pool | |
| 2969 constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); | |
|
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|
2970 ConstantPoolCleaner error_handler(cp); // set constant pool to be cleaned up. |
|
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|
2971 |
| 0 | 2972 int cp_size = cp->length(); |
| 2973 | |
| 2974 cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len | |
| 2975 | |
| 2976 // Access flags | |
| 2977 AccessFlags access_flags; | |
| 2978 jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; | |
| 2979 | |
| 2980 if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { | |
| 2981 // Set abstract bit for old class files for backward compatibility | |
| 2982 flags |= JVM_ACC_ABSTRACT; | |
| 2983 } | |
| 2984 verify_legal_class_modifiers(flags, CHECK_(nullHandle)); | |
| 2985 access_flags.set_flags(flags); | |
| 2986 | |
| 2987 // This class and superclass | |
| 2988 instanceKlassHandle super_klass; | |
| 2989 u2 this_class_index = cfs->get_u2_fast(); | |
| 2990 check_property( | |
| 2991 valid_cp_range(this_class_index, cp_size) && | |
| 2992 cp->tag_at(this_class_index).is_unresolved_klass(), | |
| 2993 "Invalid this class index %u in constant pool in class file %s", | |
| 2994 this_class_index, CHECK_(nullHandle)); | |
| 2995 | |
|
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|
2996 Symbol* class_name = cp->unresolved_klass_at(this_class_index); |
|
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|
2997 assert(class_name != NULL, "class_name can't be null"); |
| 0 | 2998 |
| 2999 // It's important to set parsed_name *before* resolving the super class. | |
| 3000 // (it's used for cleanup by the caller if parsing fails) | |
| 3001 parsed_name = class_name; | |
|
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|
3002 // parsed_name is returned and can be used if there's an error, so add to |
|
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6990754: Use native memory and reference counting to implement SymbolTable
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2085
diff
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|
3003 // its reference count. Caller will decrement the refcount. |
|
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2085
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|
3004 parsed_name->increment_refcount(); |
| 0 | 3005 |
| 3006 // Update _class_name which could be null previously to be class_name | |
| 3007 _class_name = class_name; | |
| 3008 | |
| 3009 // Don't need to check whether this class name is legal or not. | |
| 3010 // It has been checked when constant pool is parsed. | |
| 3011 // However, make sure it is not an array type. | |
| 3012 if (_need_verify) { | |
| 3013 guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, | |
| 3014 "Bad class name in class file %s", | |
| 3015 CHECK_(nullHandle)); | |
| 3016 } | |
| 3017 | |
| 3018 klassOop preserve_this_klass; // for storing result across HandleMark | |
| 3019 | |
| 3020 // release all handles when parsing is done | |
| 3021 { HandleMark hm(THREAD); | |
| 3022 | |
| 3023 // Checks if name in class file matches requested name | |
|
2177
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|
3024 if (name != NULL && class_name != name) { |
| 0 | 3025 ResourceMark rm(THREAD); |
| 3026 Exceptions::fthrow( | |
| 3027 THREAD_AND_LOCATION, | |
|
2177
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diff
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|
3028 vmSymbols::java_lang_NoClassDefFoundError(), |
| 0 | 3029 "%s (wrong name: %s)", |
| 3030 name->as_C_string(), | |
| 3031 class_name->as_C_string() | |
| 3032 ); | |
| 3033 return nullHandle; | |
| 3034 } | |
| 3035 | |
| 3036 if (TraceClassLoadingPreorder) { | |
|
2177
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6990754: Use native memory and reference counting to implement SymbolTable
coleenp
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2085
diff
changeset
|
3037 tty->print("[Loading %s", name->as_klass_external_name()); |
| 0 | 3038 if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); |
| 3039 tty->print_cr("]"); | |
| 3040 } | |
| 3041 | |
| 3042 u2 super_class_index = cfs->get_u2_fast(); | |
| 3043 if (super_class_index == 0) { | |
|
2177
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2085
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|
3044 check_property(class_name == vmSymbols::java_lang_Object(), |
| 0 | 3045 "Invalid superclass index %u in class file %s", |
| 3046 super_class_index, | |
| 3047 CHECK_(nullHandle)); | |
| 3048 } else { | |
| 3049 check_property(valid_cp_range(super_class_index, cp_size) && | |
|
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|
3050 is_klass_reference(cp, super_class_index), |
| 0 | 3051 "Invalid superclass index %u in class file %s", |
| 3052 super_class_index, | |
| 3053 CHECK_(nullHandle)); | |
| 3054 // The class name should be legal because it is checked when parsing constant pool. | |
| 3055 // However, make sure it is not an array type. | |
|
431
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|
3056 bool is_array = false; |
|
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|
3057 if (cp->tag_at(super_class_index).is_klass()) { |
|
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|
3058 super_klass = instanceKlassHandle(THREAD, cp->resolved_klass_at(super_class_index)); |
|
a45484ea312d
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|
3059 if (_need_verify) |
|
a45484ea312d
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|
3060 is_array = super_klass->oop_is_array(); |
|
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diff
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|
3061 } else if (_need_verify) { |
|
a45484ea312d
6653858: dynamic languages need to be able to load anonymous classes
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|
3062 is_array = (cp->unresolved_klass_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); |
|
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6653858: dynamic languages need to be able to load anonymous classes
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|
3063 } |
| 0 | 3064 if (_need_verify) { |
|
431
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|
3065 guarantee_property(!is_array, |
| 0 | 3066 "Bad superclass name in class file %s", CHECK_(nullHandle)); |
| 3067 } | |
| 3068 } | |
| 3069 | |
| 3070 // Interfaces | |
| 3071 u2 itfs_len = cfs->get_u2_fast(); | |
| 3072 objArrayHandle local_interfaces; | |
| 3073 if (itfs_len == 0) { | |
| 3074 local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3075 } else { | |
|
875
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6857194: Add hotspot perf counters to aid class loading performance measurement
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|
3076 local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, _class_name, CHECK_(nullHandle)); |
| 0 | 3077 } |
| 3078 | |
| 3079 // Fields (offsets are filled in later) | |
| 3080 struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0}; | |
| 3081 objArrayHandle fields_annotations; | |
| 3082 typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle)); | |
| 3083 // Methods | |
| 3084 bool has_final_method = false; | |
| 3085 AccessFlags promoted_flags; | |
| 3086 promoted_flags.set_flags(0); | |
| 3087 // These need to be oop pointers because they are allocated lazily | |
| 3088 // inside parse_methods inside a nested HandleMark | |
| 3089 objArrayOop methods_annotations_oop = NULL; | |
| 3090 objArrayOop methods_parameter_annotations_oop = NULL; | |
| 3091 objArrayOop methods_default_annotations_oop = NULL; | |
| 3092 objArrayHandle methods = parse_methods(cp, access_flags.is_interface(), | |
| 3093 &promoted_flags, | |
| 3094 &has_final_method, | |
| 3095 &methods_annotations_oop, | |
| 3096 &methods_parameter_annotations_oop, | |
| 3097 &methods_default_annotations_oop, | |
| 3098 CHECK_(nullHandle)); | |
| 3099 | |
| 3100 objArrayHandle methods_annotations(THREAD, methods_annotations_oop); | |
| 3101 objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop); | |
| 3102 objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop); | |
| 3103 | |
| 3104 // We check super class after class file is parsed and format is checked | |
|
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|
3105 if (super_class_index > 0 && super_klass.is_null()) { |
|
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|
3106 Symbol* sk = cp->klass_name_at(super_class_index); |
| 0 | 3107 if (access_flags.is_interface()) { |
| 3108 // Before attempting to resolve the superclass, check for class format | |
| 3109 // errors not checked yet. | |
|
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|
3110 guarantee_property(sk == vmSymbols::java_lang_Object(), |
| 0 | 3111 "Interfaces must have java.lang.Object as superclass in class file %s", |
| 3112 CHECK_(nullHandle)); | |
| 3113 } | |
| 3114 klassOop k = SystemDictionary::resolve_super_or_fail(class_name, | |
| 3115 sk, | |
| 3116 class_loader, | |
| 3117 protection_domain, | |
| 3118 true, | |
| 3119 CHECK_(nullHandle)); | |
|
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|
3120 |
| 0 | 3121 KlassHandle kh (THREAD, k); |
| 3122 super_klass = instanceKlassHandle(THREAD, kh()); | |
|
474
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6779339: turn off LinkWellKnownClasses by default pending further testing
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diff
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|
3123 if (LinkWellKnownClasses) // my super class is well known to me |
|
7a018855d2f0
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diff
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|
3124 cp->klass_at_put(super_class_index, super_klass()); // eagerly resolve |
|
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|
3125 } |
|
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|
3126 if (super_klass.not_null()) { |
| 0 | 3127 if (super_klass->is_interface()) { |
| 3128 ResourceMark rm(THREAD); | |
| 3129 Exceptions::fthrow( | |
| 3130 THREAD_AND_LOCATION, | |
|
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|
3131 vmSymbols::java_lang_IncompatibleClassChangeError(), |
| 0 | 3132 "class %s has interface %s as super class", |
| 3133 class_name->as_klass_external_name(), | |
| 3134 super_klass->external_name() | |
| 3135 ); | |
| 3136 return nullHandle; | |
| 3137 } | |
| 3138 // Make sure super class is not final | |
| 3139 if (super_klass->is_final()) { | |
| 3140 THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); | |
| 3141 } | |
| 3142 } | |
| 3143 | |
| 3144 // Compute the transitive list of all unique interfaces implemented by this class | |
| 3145 objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); | |
| 3146 | |
| 3147 // sort methods | |
| 3148 typeArrayHandle method_ordering = sort_methods(methods, | |
| 3149 methods_annotations, | |
| 3150 methods_parameter_annotations, | |
| 3151 methods_default_annotations, | |
| 3152 CHECK_(nullHandle)); | |
| 3153 | |
| 3154 // promote flags from parse_methods() to the klass' flags | |
| 3155 access_flags.add_promoted_flags(promoted_flags.as_int()); | |
| 3156 | |
| 3157 // Size of Java vtable (in words) | |
| 3158 int vtable_size = 0; | |
| 3159 int itable_size = 0; | |
| 3160 int num_miranda_methods = 0; | |
| 3161 | |
| 3162 klassVtable::compute_vtable_size_and_num_mirandas(vtable_size, | |
| 3163 num_miranda_methods, | |
| 3164 super_klass(), | |
| 3165 methods(), | |
| 3166 access_flags, | |
|
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|
3167 class_loader, |
|
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|
3168 class_name, |
|
4aaa9f5e02a8
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|
3169 local_interfaces(), |
|
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|
3170 CHECK_(nullHandle)); |
| 0 | 3171 |
| 3172 // Size of Java itable (in words) | |
| 3173 itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces); | |
| 3174 | |
| 3175 // Field size and offset computation | |
| 3176 int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size(); | |
| 3177 #ifndef PRODUCT | |
| 3178 int orig_nonstatic_field_size = 0; | |
| 3179 #endif | |
| 3180 int static_field_size = 0; | |
| 3181 int next_static_oop_offset; | |
| 3182 int next_static_double_offset; | |
| 3183 int next_static_word_offset; | |
| 3184 int next_static_short_offset; | |
| 3185 int next_static_byte_offset; | |
| 3186 int next_static_type_offset; | |
| 3187 int next_nonstatic_oop_offset; | |
| 3188 int next_nonstatic_double_offset; | |
| 3189 int next_nonstatic_word_offset; | |
| 3190 int next_nonstatic_short_offset; | |
| 3191 int next_nonstatic_byte_offset; | |
| 3192 int next_nonstatic_type_offset; | |
| 3193 int first_nonstatic_oop_offset; | |
| 3194 int first_nonstatic_field_offset; | |
| 3195 int next_nonstatic_field_offset; | |
| 3196 | |
| 3197 // Calculate the starting byte offsets | |
| 3198 next_static_oop_offset = (instanceKlass::header_size() + | |
| 3199 align_object_offset(vtable_size) + | |
| 3200 align_object_offset(itable_size)) * wordSize; | |
| 3201 next_static_double_offset = next_static_oop_offset + | |
|
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3202 (fac.static_oop_count * heapOopSize); |
| 0 | 3203 if ( fac.static_double_count && |
| 3204 (Universe::field_type_should_be_aligned(T_DOUBLE) || | |
| 3205 Universe::field_type_should_be_aligned(T_LONG)) ) { | |
| 3206 next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); | |
| 3207 } | |
| 3208 | |
| 3209 next_static_word_offset = next_static_double_offset + | |
| 3210 (fac.static_double_count * BytesPerLong); | |
| 3211 next_static_short_offset = next_static_word_offset + | |
| 3212 (fac.static_word_count * BytesPerInt); | |
| 3213 next_static_byte_offset = next_static_short_offset + | |
| 3214 (fac.static_short_count * BytesPerShort); | |
| 3215 next_static_type_offset = align_size_up((next_static_byte_offset + | |
| 3216 fac.static_byte_count ), wordSize ); | |
| 3217 static_field_size = (next_static_type_offset - | |
| 3218 next_static_oop_offset) / wordSize; | |
|
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3219 first_nonstatic_field_offset = instanceOopDesc::base_offset_in_bytes() + |
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3220 nonstatic_field_size * heapOopSize; |
| 0 | 3221 next_nonstatic_field_offset = first_nonstatic_field_offset; |
| 3222 | |
| 3223 // Add fake fields for java.lang.Class instances (also see below) | |
|
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3224 if (class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) { |
| 0 | 3225 java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle)); |
| 3226 } | |
| 3227 | |
| 710 | 3228 // adjust the vmentry field declaration in java.dyn.MethodHandle |
|
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3229 if (EnableMethodHandles && class_name == vmSymbols::sun_dyn_MethodHandleImpl() && class_loader.is_null()) { |
|
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|
3230 java_dyn_MethodHandle_fix_pre(cp, fields, &fac, CHECK_(nullHandle)); |
| 710 | 3231 } |
| 3232 | |
| 0 | 3233 // Add a fake "discovered" field if it is not present |
| 3234 // for compatibility with earlier jdk's. | |
|
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3235 if (class_name == vmSymbols::java_lang_ref_Reference() |
| 0 | 3236 && class_loader.is_null()) { |
| 3237 java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle)); | |
| 3238 } | |
| 3239 // end of "discovered" field compactibility fix | |
| 3240 | |
|
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3241 unsigned int nonstatic_double_count = fac.nonstatic_double_count; |
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3242 unsigned int nonstatic_word_count = fac.nonstatic_word_count; |
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3243 unsigned int nonstatic_short_count = fac.nonstatic_short_count; |
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3244 unsigned int nonstatic_byte_count = fac.nonstatic_byte_count; |
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3245 unsigned int nonstatic_oop_count = fac.nonstatic_oop_count; |
| 0 | 3246 |
|
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3247 bool super_has_nonstatic_fields = |
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3248 (super_klass() != NULL && super_klass->has_nonstatic_fields()); |
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3249 bool has_nonstatic_fields = super_has_nonstatic_fields || |
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3250 ((nonstatic_double_count + nonstatic_word_count + |
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3251 nonstatic_short_count + nonstatic_byte_count + |
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3252 nonstatic_oop_count) != 0); |
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3253 |
|
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|
3254 |
|
939
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|
3255 // Prepare list of oops for oop map generation. |
|
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|
3256 int* nonstatic_oop_offsets; |
|
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|
3257 unsigned int* nonstatic_oop_counts; |
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|
3258 unsigned int nonstatic_oop_map_count = 0; |
| 0 | 3259 |
| 3260 nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( | |
|
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|
3261 THREAD, int, nonstatic_oop_count + 1); |
| 938 | 3262 nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( |
|
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|
3263 THREAD, unsigned int, nonstatic_oop_count + 1); |
| 0 | 3264 |
| 3265 // Add fake fields for java.lang.Class instances (also see above). | |
| 3266 // FieldsAllocationStyle and CompactFields values will be reset to default. | |
|
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3267 if(class_name == vmSymbols::java_lang_Class() && class_loader.is_null()) { |
| 0 | 3268 java_lang_Class_fix_post(&next_nonstatic_field_offset); |
|
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|
3269 nonstatic_oop_offsets[0] = first_nonstatic_field_offset; |
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|
3270 const uint fake_oop_count = (next_nonstatic_field_offset - |
|
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|
3271 first_nonstatic_field_offset) / heapOopSize; |
|
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|
3272 nonstatic_oop_counts[0] = fake_oop_count; |
|
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|
3273 nonstatic_oop_map_count = 1; |
|
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|
3274 nonstatic_oop_count -= fake_oop_count; |
| 0 | 3275 first_nonstatic_oop_offset = first_nonstatic_field_offset; |
| 3276 } else { | |
| 3277 first_nonstatic_oop_offset = 0; // will be set for first oop field | |
| 3278 } | |
| 3279 | |
| 3280 #ifndef PRODUCT | |
| 3281 if( PrintCompactFieldsSavings ) { | |
| 3282 next_nonstatic_double_offset = next_nonstatic_field_offset + | |
|
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|
3283 (nonstatic_oop_count * heapOopSize); |
| 0 | 3284 if ( nonstatic_double_count > 0 ) { |
| 3285 next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong); | |
| 3286 } | |
| 3287 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3288 (nonstatic_double_count * BytesPerLong); | |
| 3289 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3290 (nonstatic_word_count * BytesPerInt); | |
| 3291 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3292 (nonstatic_short_count * BytesPerShort); | |
| 3293 next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset + | |
|
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|
3294 nonstatic_byte_count ), heapOopSize ); |
| 0 | 3295 orig_nonstatic_field_size = nonstatic_field_size + |
|
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|
3296 ((next_nonstatic_type_offset - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3297 } |
| 3298 #endif | |
| 3299 bool compact_fields = CompactFields; | |
| 3300 int allocation_style = FieldsAllocationStyle; | |
|
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|
3301 if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? |
|
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|
3302 assert(false, "0 <= FieldsAllocationStyle <= 2"); |
| 0 | 3303 allocation_style = 1; // Optimistic |
| 3304 } | |
| 3305 | |
| 3306 // The next classes have predefined hard-coded fields offsets | |
| 3307 // (see in JavaClasses::compute_hard_coded_offsets()). | |
| 3308 // Use default fields allocation order for them. | |
| 3309 if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && | |
|
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|
3310 (class_name == vmSymbols::java_lang_AssertionStatusDirectives() || |
|
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|
3311 class_name == vmSymbols::java_lang_Class() || |
|
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|
3312 class_name == vmSymbols::java_lang_ClassLoader() || |
|
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|
3313 class_name == vmSymbols::java_lang_ref_Reference() || |
|
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|
3314 class_name == vmSymbols::java_lang_ref_SoftReference() || |
|
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|
3315 class_name == vmSymbols::java_lang_StackTraceElement() || |
|
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|
3316 class_name == vmSymbols::java_lang_String() || |
|
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|
3317 class_name == vmSymbols::java_lang_Throwable() || |
|
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|
3318 class_name == vmSymbols::java_lang_Boolean() || |
|
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|
3319 class_name == vmSymbols::java_lang_Character() || |
|
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|
3320 class_name == vmSymbols::java_lang_Float() || |
|
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|
3321 class_name == vmSymbols::java_lang_Double() || |
|
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|
3322 class_name == vmSymbols::java_lang_Byte() || |
|
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|
3323 class_name == vmSymbols::java_lang_Short() || |
|
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|
3324 class_name == vmSymbols::java_lang_Integer() || |
|
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|
3325 class_name == vmSymbols::java_lang_Long())) { |
| 0 | 3326 allocation_style = 0; // Allocate oops first |
| 3327 compact_fields = false; // Don't compact fields | |
| 3328 } | |
| 3329 | |
| 3330 if( allocation_style == 0 ) { | |
| 3331 // Fields order: oops, longs/doubles, ints, shorts/chars, bytes | |
| 3332 next_nonstatic_oop_offset = next_nonstatic_field_offset; | |
| 3333 next_nonstatic_double_offset = next_nonstatic_oop_offset + | |
|
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|
3334 (nonstatic_oop_count * heapOopSize); |
| 0 | 3335 } else if( allocation_style == 1 ) { |
| 3336 // Fields order: longs/doubles, ints, shorts/chars, bytes, oops | |
| 3337 next_nonstatic_double_offset = next_nonstatic_field_offset; | |
|
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|
3338 } else if( allocation_style == 2 ) { |
|
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|
3339 // Fields allocation: oops fields in super and sub classes are together. |
|
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|
3340 if( nonstatic_field_size > 0 && super_klass() != NULL && |
|
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|
3341 super_klass->nonstatic_oop_map_size() > 0 ) { |
|
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|
3342 int map_size = super_klass->nonstatic_oop_map_size(); |
|
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|
3343 OopMapBlock* first_map = super_klass->start_of_nonstatic_oop_maps(); |
|
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|
3344 OopMapBlock* last_map = first_map + map_size - 1; |
|
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|
3345 int next_offset = last_map->offset() + (last_map->count() * heapOopSize); |
|
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|
3346 if (next_offset == next_nonstatic_field_offset) { |
|
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|
3347 allocation_style = 0; // allocate oops first |
|
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|
3348 next_nonstatic_oop_offset = next_nonstatic_field_offset; |
|
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|
3349 next_nonstatic_double_offset = next_nonstatic_oop_offset + |
|
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|
3350 (nonstatic_oop_count * heapOopSize); |
|
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|
3351 } |
|
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|
3352 } |
|
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|
3353 if( allocation_style == 2 ) { |
|
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|
3354 allocation_style = 1; // allocate oops last |
|
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|
3355 next_nonstatic_double_offset = next_nonstatic_field_offset; |
|
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|
3356 } |
| 0 | 3357 } else { |
| 3358 ShouldNotReachHere(); | |
| 3359 } | |
| 3360 | |
| 3361 int nonstatic_oop_space_count = 0; | |
| 3362 int nonstatic_word_space_count = 0; | |
| 3363 int nonstatic_short_space_count = 0; | |
| 3364 int nonstatic_byte_space_count = 0; | |
| 3365 int nonstatic_oop_space_offset; | |
| 3366 int nonstatic_word_space_offset; | |
| 3367 int nonstatic_short_space_offset; | |
| 3368 int nonstatic_byte_space_offset; | |
| 3369 | |
|
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|
3370 if( nonstatic_double_count > 0 ) { |
|
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|
3371 int offset = next_nonstatic_double_offset; |
| 0 | 3372 next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); |
| 3373 if( compact_fields && offset != next_nonstatic_double_offset ) { | |
| 3374 // Allocate available fields into the gap before double field. | |
| 3375 int length = next_nonstatic_double_offset - offset; | |
| 3376 assert(length == BytesPerInt, ""); | |
| 3377 nonstatic_word_space_offset = offset; | |
| 3378 if( nonstatic_word_count > 0 ) { | |
| 3379 nonstatic_word_count -= 1; | |
| 3380 nonstatic_word_space_count = 1; // Only one will fit | |
| 3381 length -= BytesPerInt; | |
| 3382 offset += BytesPerInt; | |
| 3383 } | |
| 3384 nonstatic_short_space_offset = offset; | |
| 3385 while( length >= BytesPerShort && nonstatic_short_count > 0 ) { | |
| 3386 nonstatic_short_count -= 1; | |
| 3387 nonstatic_short_space_count += 1; | |
| 3388 length -= BytesPerShort; | |
| 3389 offset += BytesPerShort; | |
| 3390 } | |
| 3391 nonstatic_byte_space_offset = offset; | |
| 3392 while( length > 0 && nonstatic_byte_count > 0 ) { | |
| 3393 nonstatic_byte_count -= 1; | |
| 3394 nonstatic_byte_space_count += 1; | |
| 3395 length -= 1; | |
| 3396 } | |
| 3397 // Allocate oop field in the gap if there are no other fields for that. | |
| 3398 nonstatic_oop_space_offset = offset; | |
|
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|
3399 if( length >= heapOopSize && nonstatic_oop_count > 0 && |
| 0 | 3400 allocation_style != 0 ) { // when oop fields not first |
| 3401 nonstatic_oop_count -= 1; | |
| 3402 nonstatic_oop_space_count = 1; // Only one will fit | |
|
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3403 length -= heapOopSize; |
|
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|
3404 offset += heapOopSize; |
| 0 | 3405 } |
| 3406 } | |
| 3407 } | |
| 3408 | |
| 3409 next_nonstatic_word_offset = next_nonstatic_double_offset + | |
| 3410 (nonstatic_double_count * BytesPerLong); | |
| 3411 next_nonstatic_short_offset = next_nonstatic_word_offset + | |
| 3412 (nonstatic_word_count * BytesPerInt); | |
| 3413 next_nonstatic_byte_offset = next_nonstatic_short_offset + | |
| 3414 (nonstatic_short_count * BytesPerShort); | |
| 3415 | |
| 3416 int notaligned_offset; | |
| 3417 if( allocation_style == 0 ) { | |
| 3418 notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3419 } else { // allocation_style == 1 | |
| 3420 next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count; | |
| 3421 if( nonstatic_oop_count > 0 ) { | |
|
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3422 next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); |
| 0 | 3423 } |
|
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|
3424 notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); |
| 0 | 3425 } |
|
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|
3426 next_nonstatic_type_offset = align_size_up(notaligned_offset, heapOopSize ); |
| 0 | 3427 nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset |
|
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|
3428 - first_nonstatic_field_offset)/heapOopSize); |
| 0 | 3429 |
| 3430 // Iterate over fields again and compute correct offsets. | |
| 3431 // The field allocation type was temporarily stored in the offset slot. | |
| 3432 // oop fields are located before non-oop fields (static and non-static). | |
| 3433 int len = fields->length(); | |
| 3434 for (int i = 0; i < len; i += instanceKlass::next_offset) { | |
| 3435 int real_offset; | |
| 1108 | 3436 FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i + instanceKlass::low_offset); |
| 0 | 3437 switch (atype) { |
| 3438 case STATIC_OOP: | |
| 3439 real_offset = next_static_oop_offset; | |
|
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|
3440 next_static_oop_offset += heapOopSize; |
| 0 | 3441 break; |
| 3442 case STATIC_BYTE: | |
| 3443 real_offset = next_static_byte_offset; | |
| 3444 next_static_byte_offset += 1; | |
| 3445 break; | |
| 3446 case STATIC_SHORT: | |
| 3447 real_offset = next_static_short_offset; | |
| 3448 next_static_short_offset += BytesPerShort; | |
| 3449 break; | |
| 3450 case STATIC_WORD: | |
| 3451 real_offset = next_static_word_offset; | |
| 3452 next_static_word_offset += BytesPerInt; | |
| 3453 break; | |
| 3454 case STATIC_ALIGNED_DOUBLE: | |
| 3455 case STATIC_DOUBLE: | |
| 3456 real_offset = next_static_double_offset; | |
| 3457 next_static_double_offset += BytesPerLong; | |
| 3458 break; | |
| 3459 case NONSTATIC_OOP: | |
| 3460 if( nonstatic_oop_space_count > 0 ) { | |
| 3461 real_offset = nonstatic_oop_space_offset; | |
|
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|
3462 nonstatic_oop_space_offset += heapOopSize; |
| 0 | 3463 nonstatic_oop_space_count -= 1; |
| 3464 } else { | |
| 3465 real_offset = next_nonstatic_oop_offset; | |
|
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|
3466 next_nonstatic_oop_offset += heapOopSize; |
| 0 | 3467 } |
| 3468 // Update oop maps | |
| 3469 if( nonstatic_oop_map_count > 0 && | |
| 3470 nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == | |
|
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|
3471 real_offset - |
|
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|
3472 int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * |
|
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|
3473 heapOopSize ) { |
| 0 | 3474 // Extend current oop map |
| 938 | 3475 nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; |
| 0 | 3476 } else { |
| 3477 // Create new oop map | |
|
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|
3478 nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; |
| 938 | 3479 nonstatic_oop_counts [nonstatic_oop_map_count] = 1; |
| 0 | 3480 nonstatic_oop_map_count += 1; |
| 3481 if( first_nonstatic_oop_offset == 0 ) { // Undefined | |
| 3482 first_nonstatic_oop_offset = real_offset; | |
| 3483 } | |
| 3484 } | |
| 3485 break; | |
| 3486 case NONSTATIC_BYTE: | |
| 3487 if( nonstatic_byte_space_count > 0 ) { | |
| 3488 real_offset = nonstatic_byte_space_offset; | |
| 3489 nonstatic_byte_space_offset += 1; | |
| 3490 nonstatic_byte_space_count -= 1; | |
| 3491 } else { | |
| 3492 real_offset = next_nonstatic_byte_offset; | |
| 3493 next_nonstatic_byte_offset += 1; | |
| 3494 } | |
| 3495 break; | |
| 3496 case NONSTATIC_SHORT: | |
| 3497 if( nonstatic_short_space_count > 0 ) { | |
| 3498 real_offset = nonstatic_short_space_offset; | |
| 3499 nonstatic_short_space_offset += BytesPerShort; | |
| 3500 nonstatic_short_space_count -= 1; | |
| 3501 } else { | |
| 3502 real_offset = next_nonstatic_short_offset; | |
| 3503 next_nonstatic_short_offset += BytesPerShort; | |
| 3504 } | |
| 3505 break; | |
| 3506 case NONSTATIC_WORD: | |
| 3507 if( nonstatic_word_space_count > 0 ) { | |
| 3508 real_offset = nonstatic_word_space_offset; | |
| 3509 nonstatic_word_space_offset += BytesPerInt; | |
| 3510 nonstatic_word_space_count -= 1; | |
| 3511 } else { | |
| 3512 real_offset = next_nonstatic_word_offset; | |
| 3513 next_nonstatic_word_offset += BytesPerInt; | |
| 3514 } | |
| 3515 break; | |
| 3516 case NONSTATIC_ALIGNED_DOUBLE: | |
| 3517 case NONSTATIC_DOUBLE: | |
| 3518 real_offset = next_nonstatic_double_offset; | |
| 3519 next_nonstatic_double_offset += BytesPerLong; | |
| 3520 break; | |
| 3521 default: | |
| 3522 ShouldNotReachHere(); | |
| 3523 } | |
| 1108 | 3524 fields->short_at_put(i + instanceKlass::low_offset, extract_low_short_from_int(real_offset)); |
| 3525 fields->short_at_put(i + instanceKlass::high_offset, extract_high_short_from_int(real_offset)); | |
| 0 | 3526 } |
| 3527 | |
| 3528 // Size of instances | |
| 3529 int instance_size; | |
| 3530 | |
|
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|
3531 next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize ); |
| 0 | 3532 instance_size = align_object_size(next_nonstatic_type_offset / wordSize); |
| 3533 | |
|
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|
3534 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 | 3535 |
| 938 | 3536 // Number of non-static oop map blocks allocated at end of klass. |
|
939
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|
3537 const unsigned int total_oop_map_count = |
|
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|
3538 compute_oop_map_count(super_klass, nonstatic_oop_map_count, |
|
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|
3539 first_nonstatic_oop_offset); |
| 0 | 3540 |
| 3541 // Compute reference type | |
| 3542 ReferenceType rt; | |
| 3543 if (super_klass() == NULL) { | |
| 3544 rt = REF_NONE; | |
| 3545 } else { | |
| 3546 rt = super_klass->reference_type(); | |
| 3547 } | |
| 3548 | |
| 3549 // We can now create the basic klassOop for this klass | |
|
939
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|
3550 klassOop ik = oopFactory::new_instanceKlass(vtable_size, itable_size, |
|
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|
3551 static_field_size, |
|
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|
3552 total_oop_map_count, |
|
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|
3553 rt, CHECK_(nullHandle)); |
| 0 | 3554 instanceKlassHandle this_klass (THREAD, ik); |
| 3555 | |
| 938 | 3556 assert(this_klass->static_field_size() == static_field_size, "sanity"); |
| 3557 assert(this_klass->nonstatic_oop_map_count() == total_oop_map_count, | |
| 3558 "sanity"); | |
| 0 | 3559 |
| 3560 // Fill in information already parsed | |
| 3561 this_klass->set_access_flags(access_flags); | |
| 975 | 3562 this_klass->set_should_verify_class(verify); |
| 0 | 3563 jint lh = Klass::instance_layout_helper(instance_size, false); |
| 3564 this_klass->set_layout_helper(lh); | |
| 3565 assert(this_klass->oop_is_instance(), "layout is correct"); | |
| 3566 assert(this_klass->size_helper() == instance_size, "correct size_helper"); | |
| 3567 // Not yet: supers are done below to support the new subtype-checking fields | |
| 3568 //this_klass->set_super(super_klass()); | |
| 3569 this_klass->set_class_loader(class_loader()); | |
| 3570 this_klass->set_nonstatic_field_size(nonstatic_field_size); | |
| 975 | 3571 this_klass->set_has_nonstatic_fields(has_nonstatic_fields); |
| 0 | 3572 this_klass->set_static_oop_field_size(fac.static_oop_count); |
| 3573 cp->set_pool_holder(this_klass()); | |
|
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2085
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|
3574 error_handler.set_in_error(false); // turn off error handler for cp |
| 0 | 3575 this_klass->set_constants(cp()); |
| 3576 this_klass->set_local_interfaces(local_interfaces()); | |
| 3577 this_klass->set_fields(fields()); | |
| 3578 this_klass->set_methods(methods()); | |
| 3579 if (has_final_method) { | |
| 3580 this_klass->set_has_final_method(); | |
| 3581 } | |
| 3582 this_klass->set_method_ordering(method_ordering()); | |
|
977
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|
3583 // The instanceKlass::_methods_jmethod_ids cache and the |
|
74a5db69c1fe
6419370: 4/4 new jmethodID code has tiny holes in synchronization
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diff
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|
3584 // instanceKlass::_methods_cached_itable_indices cache are |
|
74a5db69c1fe
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diff
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|
3585 // both managed on the assumption that the initial cache |
|
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diff
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|
3586 // size is equal to the number of methods in the class. If |
|
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975
diff
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|
3587 // that changes, then instanceKlass::idnum_can_increment() |
|
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diff
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|
3588 // has to be changed accordingly. |
| 0 | 3589 this_klass->set_initial_method_idnum(methods->length()); |
| 3590 this_klass->set_name(cp->klass_name_at(this_class_index)); | |
| 710 | 3591 if (LinkWellKnownClasses || is_anonymous()) // I am well known to myself |
|
474
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431
diff
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|
3592 cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve |
| 0 | 3593 this_klass->set_protection_domain(protection_domain()); |
| 3594 this_klass->set_fields_annotations(fields_annotations()); | |
| 3595 this_klass->set_methods_annotations(methods_annotations()); | |
| 3596 this_klass->set_methods_parameter_annotations(methods_parameter_annotations()); | |
| 3597 this_klass->set_methods_default_annotations(methods_default_annotations()); | |
| 3598 | |
| 3599 this_klass->set_minor_version(minor_version); | |
| 3600 this_klass->set_major_version(major_version); | |
| 3601 | |
|
856
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diff
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|
3602 // 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
|
3603 // (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
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diff
changeset
|
3604 // 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
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710
diff
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|
3605 // when everything is fresh in memory.) |
|
75596850f863
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710
diff
changeset
|
3606 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
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diff
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|
3607 for (int j = 0; j < methods->length(); j++) { |
|
75596850f863
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710
diff
changeset
|
3608 ((methodOop)methods->obj_at(j))->init_intrinsic_id(); |
|
75596850f863
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jrose
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|
3609 } |
|
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|
3610 } |
|
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|
3611 |
| 0 | 3612 if (cached_class_file_bytes != NULL) { |
| 3613 // JVMTI: we have an instanceKlass now, tell it about the cached bytes | |
| 3614 this_klass->set_cached_class_file(cached_class_file_bytes, | |
| 3615 cached_class_file_length); | |
| 3616 } | |
| 3617 | |
| 3618 // Miranda methods | |
| 3619 if ((num_miranda_methods > 0) || | |
| 3620 // if this class introduced new miranda methods or | |
| 3621 (super_klass.not_null() && (super_klass->has_miranda_methods())) | |
| 3622 // super class exists and this class inherited miranda methods | |
| 3623 ) { | |
| 3624 this_klass->set_has_miranda_methods(); // then set a flag | |
| 3625 } | |
| 3626 | |
| 3627 // Additional attributes | |
| 3628 parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle)); | |
| 3629 | |
| 3630 // Make sure this is the end of class file stream | |
| 3631 guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); | |
| 3632 | |
| 3633 // Initialize static fields | |
| 3634 this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle)); | |
| 3635 | |
| 3636 // VerifyOops believes that once this has been set, the object is completely loaded. | |
| 3637 // Compute transitive closure of interfaces this class implements | |
| 3638 this_klass->set_transitive_interfaces(transitive_interfaces()); | |
| 3639 | |
| 3640 // Fill in information needed to compute superclasses. | |
| 3641 this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); | |
| 3642 | |
| 3643 // Initialize itable offset tables | |
| 3644 klassItable::setup_itable_offset_table(this_klass); | |
| 3645 | |
| 3646 // Do final class setup | |
| 938 | 3647 fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_counts); |
| 0 | 3648 |
| 3649 set_precomputed_flags(this_klass); | |
| 3650 | |
| 3651 // reinitialize modifiers, using the InnerClasses attribute | |
| 3652 int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); | |
| 3653 this_klass->set_modifier_flags(computed_modifiers); | |
| 3654 | |
| 3655 // check if this class can access its super class | |
| 3656 check_super_class_access(this_klass, CHECK_(nullHandle)); | |
| 3657 | |
| 3658 // check if this class can access its superinterfaces | |
| 3659 check_super_interface_access(this_klass, CHECK_(nullHandle)); | |
| 3660 | |
| 3661 // check if this class overrides any final method | |
| 3662 check_final_method_override(this_klass, CHECK_(nullHandle)); | |
| 3663 | |
| 3664 // check that if this class is an interface then it doesn't have static methods | |
| 3665 if (this_klass->is_interface()) { | |
| 3666 check_illegal_static_method(this_klass, CHECK_(nullHandle)); | |
| 3667 } | |
| 3668 | |
| 3669 ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()), | |
| 3670 false /* not shared class */); | |
| 3671 | |
| 3672 if (TraceClassLoading) { | |
| 3673 // print in a single call to reduce interleaving of output | |
| 3674 if (cfs->source() != NULL) { | |
| 3675 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3676 cfs->source()); | |
| 3677 } else if (class_loader.is_null()) { | |
| 3678 if (THREAD->is_Java_thread()) { | |
| 3679 klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1); | |
| 3680 tty->print("[Loaded %s by instance of %s]\n", | |
| 3681 this_klass->external_name(), | |
| 3682 instanceKlass::cast(caller)->external_name()); | |
| 3683 } else { | |
| 3684 tty->print("[Loaded %s]\n", this_klass->external_name()); | |
| 3685 } | |
| 3686 } else { | |
| 3687 ResourceMark rm; | |
| 3688 tty->print("[Loaded %s from %s]\n", this_klass->external_name(), | |
| 3689 instanceKlass::cast(class_loader->klass())->external_name()); | |
| 3690 } | |
| 3691 } | |
| 3692 | |
| 3693 if (TraceClassResolution) { | |
| 3694 // print out the superclass. | |
| 3695 const char * from = Klass::cast(this_klass())->external_name(); | |
| 3696 if (this_klass->java_super() != NULL) { | |
|
657
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652
diff
changeset
|
3697 tty->print("RESOLVE %s %s (super)\n", from, instanceKlass::cast(this_klass->java_super())->external_name()); |
| 0 | 3698 } |
| 3699 // print out each of the interface classes referred to by this class. | |
| 3700 objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces()); | |
| 3701 if (!local_interfaces.is_null()) { | |
| 3702 int length = local_interfaces->length(); | |
| 3703 for (int i = 0; i < length; i++) { | |
| 3704 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3705 instanceKlass* to_class = instanceKlass::cast(k); | |
| 3706 const char * to = to_class->external_name(); | |
|
657
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acorn
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652
diff
changeset
|
3707 tty->print("RESOLVE %s %s (interface)\n", from, to); |
| 0 | 3708 } |
| 3709 } | |
| 3710 } | |
| 3711 | |
| 3712 #ifndef PRODUCT | |
| 3713 if( PrintCompactFieldsSavings ) { | |
| 3714 if( nonstatic_field_size < orig_nonstatic_field_size ) { | |
|
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3715 tty->print("[Saved %d of %d bytes in %s]\n", |
|
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3716 (orig_nonstatic_field_size - nonstatic_field_size)*heapOopSize, |
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3717 orig_nonstatic_field_size*heapOopSize, |
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3718 this_klass->external_name()); |
| 0 | 3719 } else if( nonstatic_field_size > orig_nonstatic_field_size ) { |
|
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3720 tty->print("[Wasted %d over %d bytes in %s]\n", |
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3721 (nonstatic_field_size - orig_nonstatic_field_size)*heapOopSize, |
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3722 orig_nonstatic_field_size*heapOopSize, |
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3723 this_klass->external_name()); |
| 0 | 3724 } |
| 3725 } | |
| 3726 #endif | |
| 3727 | |
| 3728 // preserve result across HandleMark | |
| 3729 preserve_this_klass = this_klass(); | |
| 3730 } | |
| 3731 | |
| 3732 // Create new handle outside HandleMark | |
| 3733 instanceKlassHandle this_klass (THREAD, preserve_this_klass); | |
| 3734 debug_only(this_klass->as_klassOop()->verify();) | |
| 3735 | |
| 3736 return this_klass; | |
| 3737 } | |
| 3738 | |
| 3739 | |
|
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3740 unsigned int |
|
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3741 ClassFileParser::compute_oop_map_count(instanceKlassHandle super, |
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3742 unsigned int nonstatic_oop_map_count, |
|
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3743 int first_nonstatic_oop_offset) { |
|
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3744 unsigned int map_count = |
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3745 super.is_null() ? 0 : super->nonstatic_oop_map_count(); |
| 0 | 3746 if (nonstatic_oop_map_count > 0) { |
| 3747 // We have oops to add to map | |
| 938 | 3748 if (map_count == 0) { |
| 3749 map_count = nonstatic_oop_map_count; | |
| 0 | 3750 } else { |
| 938 | 3751 // Check whether we should add a new map block or whether the last one can |
| 3752 // be extended | |
| 3753 OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); | |
| 3754 OopMapBlock* const last_map = first_map + map_count - 1; | |
| 3755 | |
| 3756 int next_offset = last_map->offset() + last_map->count() * heapOopSize; | |
| 0 | 3757 if (next_offset == first_nonstatic_oop_offset) { |
| 3758 // There is no gap bettwen superklass's last oop field and first | |
| 3759 // local oop field, merge maps. | |
| 3760 nonstatic_oop_map_count -= 1; | |
| 3761 } else { | |
| 3762 // Superklass didn't end with a oop field, add extra maps | |
| 938 | 3763 assert(next_offset < first_nonstatic_oop_offset, "just checking"); |
| 0 | 3764 } |
| 938 | 3765 map_count += nonstatic_oop_map_count; |
| 0 | 3766 } |
| 3767 } | |
| 938 | 3768 return map_count; |
| 0 | 3769 } |
| 3770 | |
| 3771 | |
| 3772 void ClassFileParser::fill_oop_maps(instanceKlassHandle k, | |
|
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3773 unsigned int nonstatic_oop_map_count, |
|
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3774 int* nonstatic_oop_offsets, |
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3775 unsigned int* nonstatic_oop_counts) { |
| 0 | 3776 OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); |
| 938 | 3777 const instanceKlass* const super = k->superklass(); |
|
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3778 const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; |
| 938 | 3779 if (super_count > 0) { |
| 3780 // Copy maps from superklass | |
| 0 | 3781 OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); |
|
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|
3782 for (unsigned int i = 0; i < super_count; ++i) { |
| 0 | 3783 *this_oop_map++ = *super_oop_map++; |
| 3784 } | |
| 3785 } | |
| 938 | 3786 |
| 0 | 3787 if (nonstatic_oop_map_count > 0) { |
| 938 | 3788 if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { |
| 3789 // The counts differ because there is no gap between superklass's last oop | |
| 3790 // field and the first local oop field. Extend the last oop map copied | |
| 0 | 3791 // from the superklass instead of creating new one. |
| 3792 nonstatic_oop_map_count--; | |
| 3793 nonstatic_oop_offsets++; | |
| 3794 this_oop_map--; | |
| 938 | 3795 this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); |
| 0 | 3796 this_oop_map++; |
| 3797 } | |
| 938 | 3798 |
| 0 | 3799 // Add new map blocks, fill them |
| 3800 while (nonstatic_oop_map_count-- > 0) { | |
| 3801 this_oop_map->set_offset(*nonstatic_oop_offsets++); | |
| 938 | 3802 this_oop_map->set_count(*nonstatic_oop_counts++); |
| 0 | 3803 this_oop_map++; |
| 3804 } | |
| 938 | 3805 assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == |
| 3806 this_oop_map, "sanity"); | |
| 0 | 3807 } |
| 3808 } | |
| 3809 | |
| 3810 | |
| 3811 void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { | |
| 3812 klassOop super = k->super(); | |
| 3813 | |
| 3814 // Check if this klass has an empty finalize method (i.e. one with return bytecode only), | |
| 3815 // in which case we don't have to register objects as finalizable | |
| 3816 if (!_has_empty_finalizer) { | |
| 3817 if (_has_finalizer || | |
| 3818 (super != NULL && super->klass_part()->has_finalizer())) { | |
| 3819 k->set_has_finalizer(); | |
| 3820 } | |
| 3821 } | |
| 3822 | |
| 3823 #ifdef ASSERT | |
| 3824 bool f = false; | |
| 3825 methodOop m = k->lookup_method(vmSymbols::finalize_method_name(), | |
| 3826 vmSymbols::void_method_signature()); | |
| 3827 if (m != NULL && !m->is_empty_method()) { | |
| 3828 f = true; | |
| 3829 } | |
| 3830 assert(f == k->has_finalizer(), "inconsistent has_finalizer"); | |
| 3831 #endif | |
| 3832 | |
| 3833 // Check if this klass supports the java.lang.Cloneable interface | |
| 1142 | 3834 if (SystemDictionary::Cloneable_klass_loaded()) { |
| 3835 if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) { | |
| 0 | 3836 k->set_is_cloneable(); |
| 3837 } | |
| 3838 } | |
| 3839 | |
| 3840 // Check if this klass has a vanilla default constructor | |
| 3841 if (super == NULL) { | |
| 3842 // java.lang.Object has empty default constructor | |
| 3843 k->set_has_vanilla_constructor(); | |
| 3844 } else { | |
| 3845 if (Klass::cast(super)->has_vanilla_constructor() && | |
| 3846 _has_vanilla_constructor) { | |
| 3847 k->set_has_vanilla_constructor(); | |
| 3848 } | |
| 3849 #ifdef ASSERT | |
| 3850 bool v = false; | |
| 3851 if (Klass::cast(super)->has_vanilla_constructor()) { | |
| 3852 methodOop constructor = k->find_method(vmSymbols::object_initializer_name( | |
| 3853 ), vmSymbols::void_method_signature()); | |
| 3854 if (constructor != NULL && constructor->is_vanilla_constructor()) { | |
| 3855 v = true; | |
| 3856 } | |
| 3857 } | |
| 3858 assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); | |
| 3859 #endif | |
| 3860 } | |
| 3861 | |
| 3862 // If it cannot be fast-path allocated, set a bit in the layout helper. | |
| 3863 // See documentation of instanceKlass::can_be_fastpath_allocated(). | |
| 3864 assert(k->size_helper() > 0, "layout_helper is initialized"); | |
| 3865 if ((!RegisterFinalizersAtInit && k->has_finalizer()) | |
| 3866 || k->is_abstract() || k->is_interface() | |
| 3867 || (k->name() == vmSymbols::java_lang_Class() | |
| 3868 && k->class_loader() == NULL) | |
| 3869 || k->size_helper() >= FastAllocateSizeLimit) { | |
| 3870 // Forbid fast-path allocation. | |
| 3871 jint lh = Klass::instance_layout_helper(k->size_helper(), true); | |
| 3872 k->set_layout_helper(lh); | |
| 3873 } | |
| 3874 } | |
| 3875 | |
| 3876 | |
| 3877 // utility method for appending and array with check for duplicates | |
| 3878 | |
| 3879 void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) { | |
| 3880 // iterate over new interfaces | |
| 3881 for (int i = 0; i < ifs->length(); i++) { | |
| 3882 oop e = ifs->obj_at(i); | |
| 3883 assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking"); | |
| 3884 // check for duplicates | |
| 3885 bool duplicate = false; | |
| 3886 for (int j = 0; j < index; j++) { | |
| 3887 if (result->obj_at(j) == e) { | |
| 3888 duplicate = true; | |
| 3889 break; | |
| 3890 } | |
| 3891 } | |
| 3892 // add new interface | |
| 3893 if (!duplicate) { | |
| 3894 result->obj_at_put(index++, e); | |
| 3895 } | |
| 3896 } | |
| 3897 } | |
| 3898 | |
| 3899 objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) { | |
| 3900 // Compute maximum size for transitive interfaces | |
| 3901 int max_transitive_size = 0; | |
| 3902 int super_size = 0; | |
| 3903 // Add superclass transitive interfaces size | |
| 3904 if (super.not_null()) { | |
| 3905 super_size = super->transitive_interfaces()->length(); | |
| 3906 max_transitive_size += super_size; | |
| 3907 } | |
| 3908 // Add local interfaces' super interfaces | |
| 3909 int local_size = local_ifs->length(); | |
| 3910 for (int i = 0; i < local_size; i++) { | |
| 3911 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3912 max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length(); | |
| 3913 } | |
| 3914 // Finally add local interfaces | |
| 3915 max_transitive_size += local_size; | |
| 3916 // Construct array | |
| 3917 objArrayHandle result; | |
| 3918 if (max_transitive_size == 0) { | |
| 3919 // no interfaces, use canonicalized array | |
| 3920 result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array()); | |
| 3921 } else if (max_transitive_size == super_size) { | |
| 3922 // no new local interfaces added, share superklass' transitive interface array | |
| 3923 result = objArrayHandle(THREAD, super->transitive_interfaces()); | |
| 3924 } else if (max_transitive_size == local_size) { | |
| 3925 // only local interfaces added, share local interface array | |
| 3926 result = local_ifs; | |
| 3927 } else { | |
| 3928 objArrayHandle nullHandle; | |
| 3929 objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle)); | |
| 3930 result = objArrayHandle(THREAD, new_objarray); | |
| 3931 int index = 0; | |
| 3932 // Copy down from superclass | |
| 3933 if (super.not_null()) { | |
| 3934 append_interfaces(result, index, super->transitive_interfaces()); | |
| 3935 } | |
| 3936 // Copy down from local interfaces' superinterfaces | |
| 3937 for (int i = 0; i < local_ifs->length(); i++) { | |
| 3938 klassOop l = klassOop(local_ifs->obj_at(i)); | |
| 3939 append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces()); | |
| 3940 } | |
| 3941 // Finally add local interfaces | |
| 3942 append_interfaces(result, index, local_ifs()); | |
| 3943 | |
| 3944 // Check if duplicates were removed | |
| 3945 if (index != max_transitive_size) { | |
| 3946 assert(index < max_transitive_size, "just checking"); | |
| 3947 objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle)); | |
| 3948 for (int i = 0; i < index; i++) { | |
| 3949 oop e = result->obj_at(i); | |
| 3950 assert(e != NULL, "just checking"); | |
| 3951 new_result->obj_at_put(i, e); | |
| 3952 } | |
| 3953 result = objArrayHandle(THREAD, new_result); | |
| 3954 } | |
| 3955 } | |
| 3956 return result; | |
| 3957 } | |
| 3958 | |
| 3959 | |
| 3960 void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3961 klassOop super = this_klass->super(); | |
| 3962 if ((super != NULL) && | |
| 3963 (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) { | |
| 3964 ResourceMark rm(THREAD); | |
| 3965 Exceptions::fthrow( | |
| 3966 THREAD_AND_LOCATION, | |
|
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3967 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 3968 "class %s cannot access its superclass %s", |
| 3969 this_klass->external_name(), | |
| 3970 instanceKlass::cast(super)->external_name() | |
| 3971 ); | |
| 3972 return; | |
| 3973 } | |
| 3974 } | |
| 3975 | |
| 3976 | |
| 3977 void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { | |
| 3978 objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces()); | |
| 3979 int lng = local_interfaces->length(); | |
| 3980 for (int i = lng - 1; i >= 0; i--) { | |
| 3981 klassOop k = klassOop(local_interfaces->obj_at(i)); | |
| 3982 assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface"); | |
| 3983 if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) { | |
| 3984 ResourceMark rm(THREAD); | |
| 3985 Exceptions::fthrow( | |
| 3986 THREAD_AND_LOCATION, | |
|
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3987 vmSymbols::java_lang_IllegalAccessError(), |
| 0 | 3988 "class %s cannot access its superinterface %s", |
| 3989 this_klass->external_name(), | |
| 3990 instanceKlass::cast(k)->external_name() | |
| 3991 ); | |
| 3992 return; | |
| 3993 } | |
| 3994 } | |
| 3995 } | |
| 3996 | |
| 3997 | |
| 3998 void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { | |
| 3999 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 4000 int num_methods = methods->length(); | |
| 4001 | |
| 4002 // go thru each method and check if it overrides a final method | |
| 4003 for (int index = 0; index < num_methods; index++) { | |
| 4004 methodOop m = (methodOop)methods->obj_at(index); | |
| 4005 | |
| 4006 // skip private, static and <init> methods | |
| 4007 if ((!m->is_private()) && | |
| 4008 (!m->is_static()) && | |
| 4009 (m->name() != vmSymbols::object_initializer_name())) { | |
| 4010 | |
|
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4011 Symbol* name = m->name(); |
|
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4012 Symbol* signature = m->signature(); |
| 0 | 4013 klassOop k = this_klass->super(); |
| 4014 methodOop super_m = NULL; | |
| 4015 while (k != NULL) { | |
| 4016 // skip supers that don't have final methods. | |
| 4017 if (k->klass_part()->has_final_method()) { | |
| 4018 // lookup a matching method in the super class hierarchy | |
| 4019 super_m = instanceKlass::cast(k)->lookup_method(name, signature); | |
| 4020 if (super_m == NULL) { | |
| 4021 break; // didn't find any match; get out | |
| 4022 } | |
| 4023 | |
| 4024 if (super_m->is_final() && | |
| 4025 // matching method in super is final | |
| 4026 (Reflection::verify_field_access(this_klass->as_klassOop(), | |
| 4027 super_m->method_holder(), | |
| 4028 super_m->method_holder(), | |
| 4029 super_m->access_flags(), false)) | |
| 4030 // this class can access super final method and therefore override | |
| 4031 ) { | |
| 4032 ResourceMark rm(THREAD); | |
| 4033 Exceptions::fthrow( | |
| 4034 THREAD_AND_LOCATION, | |
|
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4035 vmSymbols::java_lang_VerifyError(), |
| 0 | 4036 "class %s overrides final method %s.%s", |
| 4037 this_klass->external_name(), | |
| 4038 name->as_C_string(), | |
| 4039 signature->as_C_string() | |
| 4040 ); | |
| 4041 return; | |
| 4042 } | |
| 4043 | |
| 4044 // continue to look from super_m's holder's super. | |
| 4045 k = instanceKlass::cast(super_m->method_holder())->super(); | |
| 4046 continue; | |
| 4047 } | |
| 4048 | |
| 4049 k = k->klass_part()->super(); | |
| 4050 } | |
| 4051 } | |
| 4052 } | |
| 4053 } | |
| 4054 | |
| 4055 | |
| 4056 // assumes that this_klass is an interface | |
| 4057 void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { | |
| 4058 assert(this_klass->is_interface(), "not an interface"); | |
| 4059 objArrayHandle methods (THREAD, this_klass->methods()); | |
| 4060 int num_methods = methods->length(); | |
| 4061 | |
| 4062 for (int index = 0; index < num_methods; index++) { | |
| 4063 methodOop m = (methodOop)methods->obj_at(index); | |
| 4064 // if m is static and not the init method, throw a verify error | |
| 4065 if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { | |
| 4066 ResourceMark rm(THREAD); | |
| 4067 Exceptions::fthrow( | |
| 4068 THREAD_AND_LOCATION, | |
|
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4069 vmSymbols::java_lang_VerifyError(), |
| 0 | 4070 "Illegal static method %s in interface %s", |
| 4071 m->name()->as_C_string(), | |
| 4072 this_klass->external_name() | |
| 4073 ); | |
| 4074 return; | |
| 4075 } | |
| 4076 } | |
| 4077 } | |
| 4078 | |
| 4079 // utility methods for format checking | |
| 4080 | |
| 4081 void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { | |
| 4082 if (!_need_verify) { return; } | |
| 4083 | |
| 4084 const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; | |
| 4085 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 4086 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 4087 const bool is_super = (flags & JVM_ACC_SUPER) != 0; | |
| 4088 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 4089 const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; | |
| 4090 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 4091 | |
| 4092 if ((is_abstract && is_final) || | |
| 4093 (is_interface && !is_abstract) || | |
| 4094 (is_interface && major_gte_15 && (is_super || is_enum)) || | |
| 4095 (!is_interface && major_gte_15 && is_annotation)) { | |
| 4096 ResourceMark rm(THREAD); | |
| 4097 Exceptions::fthrow( | |
| 4098 THREAD_AND_LOCATION, | |
|
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4099 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4100 "Illegal class modifiers in class %s: 0x%X", |
| 4101 _class_name->as_C_string(), flags | |
| 4102 ); | |
| 4103 return; | |
| 4104 } | |
| 4105 } | |
| 4106 | |
| 4107 bool ClassFileParser::has_illegal_visibility(jint flags) { | |
| 4108 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 4109 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 4110 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 4111 | |
| 4112 return ((is_public && is_protected) || | |
| 4113 (is_public && is_private) || | |
| 4114 (is_protected && is_private)); | |
| 4115 } | |
| 4116 | |
| 4117 bool ClassFileParser::is_supported_version(u2 major, u2 minor) { | |
|
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4118 u2 max_version = |
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4119 JDK_Version::is_gte_jdk17x_version() ? JAVA_MAX_SUPPORTED_VERSION : |
|
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|
4120 (JDK_Version::is_gte_jdk16x_version() ? JAVA_6_VERSION : JAVA_1_5_VERSION); |
| 0 | 4121 return (major >= JAVA_MIN_SUPPORTED_VERSION) && |
|
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|
4122 (major <= max_version) && |
|
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|
4123 ((major != max_version) || |
| 0 | 4124 (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); |
| 4125 } | |
| 4126 | |
| 4127 void ClassFileParser::verify_legal_field_modifiers( | |
| 4128 jint flags, bool is_interface, TRAPS) { | |
| 4129 if (!_need_verify) { return; } | |
| 4130 | |
| 4131 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 4132 const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; | |
| 4133 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 4134 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 4135 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 4136 const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; | |
| 4137 const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; | |
| 4138 const bool is_enum = (flags & JVM_ACC_ENUM) != 0; | |
| 4139 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 4140 | |
| 4141 bool is_illegal = false; | |
| 4142 | |
| 4143 if (is_interface) { | |
| 4144 if (!is_public || !is_static || !is_final || is_private || | |
| 4145 is_protected || is_volatile || is_transient || | |
| 4146 (major_gte_15 && is_enum)) { | |
| 4147 is_illegal = true; | |
| 4148 } | |
| 4149 } else { // not interface | |
| 4150 if (has_illegal_visibility(flags) || (is_final && is_volatile)) { | |
| 4151 is_illegal = true; | |
| 4152 } | |
| 4153 } | |
| 4154 | |
| 4155 if (is_illegal) { | |
| 4156 ResourceMark rm(THREAD); | |
| 4157 Exceptions::fthrow( | |
| 4158 THREAD_AND_LOCATION, | |
|
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|
4159 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4160 "Illegal field modifiers in class %s: 0x%X", |
| 4161 _class_name->as_C_string(), flags); | |
| 4162 return; | |
| 4163 } | |
| 4164 } | |
| 4165 | |
| 4166 void ClassFileParser::verify_legal_method_modifiers( | |
|
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4167 jint flags, bool is_interface, Symbol* name, TRAPS) { |
| 0 | 4168 if (!_need_verify) { return; } |
| 4169 | |
| 4170 const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; | |
| 4171 const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; | |
| 4172 const bool is_static = (flags & JVM_ACC_STATIC) != 0; | |
| 4173 const bool is_final = (flags & JVM_ACC_FINAL) != 0; | |
| 4174 const bool is_native = (flags & JVM_ACC_NATIVE) != 0; | |
| 4175 const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; | |
| 4176 const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; | |
| 4177 const bool is_strict = (flags & JVM_ACC_STRICT) != 0; | |
| 4178 const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; | |
| 4179 const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; | |
| 4180 const bool is_initializer = (name == vmSymbols::object_initializer_name()); | |
| 4181 | |
| 4182 bool is_illegal = false; | |
| 4183 | |
| 4184 if (is_interface) { | |
| 4185 if (!is_abstract || !is_public || is_static || is_final || | |
| 4186 is_native || (major_gte_15 && (is_synchronized || is_strict))) { | |
| 4187 is_illegal = true; | |
| 4188 } | |
| 4189 } else { // not interface | |
| 4190 if (is_initializer) { | |
| 4191 if (is_static || is_final || is_synchronized || is_native || | |
| 4192 is_abstract || (major_gte_15 && is_bridge)) { | |
| 4193 is_illegal = true; | |
| 4194 } | |
| 4195 } else { // not initializer | |
| 4196 if (is_abstract) { | |
| 4197 if ((is_final || is_native || is_private || is_static || | |
| 4198 (major_gte_15 && (is_synchronized || is_strict)))) { | |
| 4199 is_illegal = true; | |
| 4200 } | |
| 4201 } | |
| 4202 if (has_illegal_visibility(flags)) { | |
| 4203 is_illegal = true; | |
| 4204 } | |
| 4205 } | |
| 4206 } | |
| 4207 | |
| 4208 if (is_illegal) { | |
| 4209 ResourceMark rm(THREAD); | |
| 4210 Exceptions::fthrow( | |
| 4211 THREAD_AND_LOCATION, | |
|
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4212 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4213 "Method %s in class %s has illegal modifiers: 0x%X", |
| 4214 name->as_C_string(), _class_name->as_C_string(), flags); | |
| 4215 return; | |
| 4216 } | |
| 4217 } | |
| 4218 | |
| 4219 void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { | |
| 4220 assert(_need_verify, "only called when _need_verify is true"); | |
| 4221 int i = 0; | |
| 4222 int count = length >> 2; | |
| 4223 for (int k=0; k<count; k++) { | |
| 4224 unsigned char b0 = buffer[i]; | |
| 4225 unsigned char b1 = buffer[i+1]; | |
| 4226 unsigned char b2 = buffer[i+2]; | |
| 4227 unsigned char b3 = buffer[i+3]; | |
| 4228 // For an unsigned char v, | |
| 4229 // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128; | |
| 4230 // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128. | |
| 4231 unsigned char res = b0 | b0 - 1 | | |
| 4232 b1 | b1 - 1 | | |
| 4233 b2 | b2 - 1 | | |
| 4234 b3 | b3 - 1; | |
| 4235 if (res >= 128) break; | |
| 4236 i += 4; | |
| 4237 } | |
| 4238 for(; i < length; i++) { | |
| 4239 unsigned short c; | |
| 4240 // no embedded zeros | |
| 4241 guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4242 if(buffer[i] < 128) { | |
| 4243 continue; | |
| 4244 } | |
| 4245 if ((i + 5) < length) { // see if it's legal supplementary character | |
| 4246 if (UTF8::is_supplementary_character(&buffer[i])) { | |
| 4247 c = UTF8::get_supplementary_character(&buffer[i]); | |
| 4248 i += 5; | |
| 4249 continue; | |
| 4250 } | |
| 4251 } | |
| 4252 switch (buffer[i] >> 4) { | |
| 4253 default: break; | |
| 4254 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
| 4255 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4256 case 0xC: case 0xD: // 110xxxxx 10xxxxxx | |
| 4257 c = (buffer[i] & 0x1F) << 6; | |
| 4258 i++; | |
| 4259 if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4260 c += buffer[i] & 0x3F; | |
| 4261 if (_major_version <= 47 || c == 0 || c >= 0x80) { | |
| 4262 // for classes with major > 47, c must a null or a character in its shortest form | |
| 4263 break; | |
| 4264 } | |
| 4265 } | |
| 4266 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4267 case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx | |
| 4268 c = (buffer[i] & 0xF) << 12; | |
| 4269 i += 2; | |
| 4270 if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { | |
| 4271 c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); | |
| 4272 if (_major_version <= 47 || c >= 0x800) { | |
| 4273 // for classes with major > 47, c must be in its shortest form | |
| 4274 break; | |
| 4275 } | |
| 4276 } | |
| 4277 classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); | |
| 4278 } // end of switch | |
| 4279 } // end of for | |
| 4280 } | |
| 4281 | |
| 4282 // Checks if name is a legal class name. | |
|
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4283 void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) { |
| 0 | 4284 if (!_need_verify || _relax_verify) { return; } |
| 4285 | |
| 4286 char buf[fixed_buffer_size]; | |
| 4287 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4288 unsigned int length = name->utf8_length(); | |
| 4289 bool legal = false; | |
| 4290 | |
| 4291 if (length > 0) { | |
| 4292 char* p; | |
| 4293 if (bytes[0] == JVM_SIGNATURE_ARRAY) { | |
| 4294 p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4295 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4296 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4297 if (bytes[0] != '<') { | |
| 4298 p = skip_over_field_name(bytes, true, length); | |
| 4299 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4300 } | |
| 4301 } else { | |
| 4302 // 4900761: relax the constraints based on JSR202 spec | |
| 4303 // Class names may be drawn from the entire Unicode character set. | |
| 4304 // Identifiers between '/' must be unqualified names. | |
| 4305 // The utf8 string has been verified when parsing cpool entries. | |
| 4306 legal = verify_unqualified_name(bytes, length, LegalClass); | |
| 4307 } | |
| 4308 } | |
| 4309 if (!legal) { | |
| 4310 ResourceMark rm(THREAD); | |
| 4311 Exceptions::fthrow( | |
| 4312 THREAD_AND_LOCATION, | |
|
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|
4313 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4314 "Illegal class name \"%s\" in class file %s", bytes, |
| 4315 _class_name->as_C_string() | |
| 4316 ); | |
| 4317 return; | |
| 4318 } | |
| 4319 } | |
| 4320 | |
| 4321 // Checks if name is a legal field name. | |
|
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|
4322 void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) { |
| 0 | 4323 if (!_need_verify || _relax_verify) { return; } |
| 4324 | |
| 4325 char buf[fixed_buffer_size]; | |
| 4326 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4327 unsigned int length = name->utf8_length(); | |
| 4328 bool legal = false; | |
| 4329 | |
| 4330 if (length > 0) { | |
| 4331 if (_major_version < JAVA_1_5_VERSION) { | |
| 4332 if (bytes[0] != '<') { | |
| 4333 char* p = skip_over_field_name(bytes, false, length); | |
| 4334 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4335 } | |
| 4336 } else { | |
| 4337 // 4881221: relax the constraints based on JSR202 spec | |
| 4338 legal = verify_unqualified_name(bytes, length, LegalField); | |
| 4339 } | |
| 4340 } | |
| 4341 | |
| 4342 if (!legal) { | |
| 4343 ResourceMark rm(THREAD); | |
| 4344 Exceptions::fthrow( | |
| 4345 THREAD_AND_LOCATION, | |
|
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|
4346 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4347 "Illegal field name \"%s\" in class %s", bytes, |
| 4348 _class_name->as_C_string() | |
| 4349 ); | |
| 4350 return; | |
| 4351 } | |
| 4352 } | |
| 4353 | |
| 4354 // Checks if name is a legal method name. | |
|
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|
4355 void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) { |
| 0 | 4356 if (!_need_verify || _relax_verify) { return; } |
| 4357 | |
|
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|
4358 assert(name != NULL, "method name is null"); |
| 0 | 4359 char buf[fixed_buffer_size]; |
| 4360 char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4361 unsigned int length = name->utf8_length(); | |
| 4362 bool legal = false; | |
| 4363 | |
| 4364 if (length > 0) { | |
| 4365 if (bytes[0] == '<') { | |
| 4366 if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { | |
| 4367 legal = true; | |
| 4368 } | |
| 4369 } else if (_major_version < JAVA_1_5_VERSION) { | |
| 4370 char* p; | |
| 4371 p = skip_over_field_name(bytes, false, length); | |
| 4372 legal = (p != NULL) && ((p - bytes) == (int)length); | |
| 4373 } else { | |
| 4374 // 4881221: relax the constraints based on JSR202 spec | |
| 4375 legal = verify_unqualified_name(bytes, length, LegalMethod); | |
| 4376 } | |
| 4377 } | |
| 4378 | |
| 4379 if (!legal) { | |
| 4380 ResourceMark rm(THREAD); | |
| 4381 Exceptions::fthrow( | |
| 4382 THREAD_AND_LOCATION, | |
|
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|
4383 vmSymbols::java_lang_ClassFormatError(), |
| 0 | 4384 "Illegal method name \"%s\" in class %s", bytes, |
| 4385 _class_name->as_C_string() | |
| 4386 ); | |
| 4387 return; | |
| 4388 } | |
| 4389 } | |
| 4390 | |
| 4391 | |
| 4392 // Checks if signature is a legal field signature. | |
|
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|
4393 void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 4394 if (!_need_verify) { return; } |
| 4395 | |
| 4396 char buf[fixed_buffer_size]; | |
| 4397 char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4398 unsigned int length = signature->utf8_length(); | |
| 4399 char* p = skip_over_field_signature(bytes, false, length, CHECK); | |
| 4400 | |
| 4401 if (p == NULL || (p - bytes) != (int)length) { | |
|
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|
4402 throwIllegalSignature("Field", name, signature, CHECK); |
| 0 | 4403 } |
| 4404 } | |
| 4405 | |
| 4406 // Checks if signature is a legal method signature. | |
| 4407 // Returns number of parameters | |
|
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|
4408 int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) { |
| 0 | 4409 if (!_need_verify) { |
| 4410 // make sure caller's args_size will be less than 0 even for non-static | |
| 4411 // method so it will be recomputed in compute_size_of_parameters(). | |
| 4412 return -2; | |
| 4413 } | |
| 4414 | |
| 4415 unsigned int args_size = 0; | |
| 4416 char buf[fixed_buffer_size]; | |
| 4417 char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); | |
| 4418 unsigned int length = signature->utf8_length(); | |
| 4419 char* nextp; | |
| 4420 | |
| 4421 // The first character must be a '(' | |
| 4422 if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { | |
| 4423 length--; | |
| 4424 // Skip over legal field signatures | |
| 4425 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4426 while ((length > 0) && (nextp != NULL)) { | |
| 4427 args_size++; | |
| 4428 if (p[0] == 'J' || p[0] == 'D') { | |
| 4429 args_size++; | |
| 4430 } | |
| 4431 length -= nextp - p; | |
| 4432 p = nextp; | |
| 4433 nextp = skip_over_field_signature(p, false, length, CHECK_0); | |
| 4434 } | |
| 4435 // The first non-signature thing better be a ')' | |
| 4436 if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { | |
| 4437 length--; | |
| 4438 if (name->utf8_length() > 0 && name->byte_at(0) == '<') { | |
| 4439 // All internal methods must return void | |
| 4440 if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { | |
| 4441 return args_size; | |
| 4442 } | |
| 4443 } else { | |
| 4444 // Now we better just have a return value | |
| 4445 nextp = skip_over_field_signature(p, true, length, CHECK_0); | |
| 4446 if (nextp && ((int)length == (nextp - p))) { | |
| 4447 return args_size; | |
| 4448 } | |
| 4449 } | |
| 4450 } | |
| 4451 } | |
| 4452 // Report error | |
|
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|
4453 throwIllegalSignature("Method", name, signature, CHECK_0); |
| 0 | 4454 return 0; |
| 4455 } | |
| 4456 | |
| 4457 | |
|
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|
4458 // Unqualified names may not contain the characters '.', ';', '[', or '/'. |
|
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4459 // Method names also may not contain the characters '<' or '>', unless <init> |
|
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|
4460 // or <clinit>. Note that method names may not be <init> or <clinit> in this |
|
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|
4461 // method. Because these names have been checked as special cases before |
|
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|
4462 // calling this method in verify_legal_method_name. |
|
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|
4463 bool ClassFileParser::verify_unqualified_name( |
|
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|
4464 char* name, unsigned int length, int type) { |
| 0 | 4465 jchar ch; |
| 4466 | |
| 4467 for (char* p = name; p != name + length; ) { | |
| 4468 ch = *p; | |
| 4469 if (ch < 128) { | |
| 4470 p++; | |
|
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|
4471 if (ch == '.' || ch == ';' || ch == '[' ) { |
|
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|
4472 return false; // do not permit '.', ';', or '[' |
| 0 | 4473 } |
| 4474 if (type != LegalClass && ch == '/') { | |
| 4475 return false; // do not permit '/' unless it's class name | |
| 4476 } | |
| 4477 if (type == LegalMethod && (ch == '<' || ch == '>')) { | |
| 4478 return false; // do not permit '<' or '>' in method names | |
| 4479 } | |
| 4480 } else { | |
| 4481 char* tmp_p = UTF8::next(p, &ch); | |
| 4482 p = tmp_p; | |
| 4483 } | |
| 4484 } | |
| 4485 return true; | |
| 4486 } | |
| 4487 | |
| 4488 | |
| 4489 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4490 // be taken as a fieldname. Allow '/' if slash_ok is true. | |
| 4491 // Return a pointer to just past the fieldname. | |
| 4492 // Return NULL if no fieldname at all was found, or in the case of slash_ok | |
| 4493 // being true, we saw consecutive slashes (meaning we were looking for a | |
| 4494 // qualified path but found something that was badly-formed). | |
| 4495 char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { | |
| 4496 char* p; | |
| 4497 jchar ch; | |
| 4498 jboolean last_is_slash = false; | |
| 4499 jboolean not_first_ch = false; | |
| 4500 | |
| 4501 for (p = name; p != name + length; not_first_ch = true) { | |
| 4502 char* old_p = p; | |
| 4503 ch = *p; | |
| 4504 if (ch < 128) { | |
| 4505 p++; | |
| 4506 // quick check for ascii | |
| 4507 if ((ch >= 'a' && ch <= 'z') || | |
| 4508 (ch >= 'A' && ch <= 'Z') || | |
| 4509 (ch == '_' || ch == '$') || | |
| 4510 (not_first_ch && ch >= '0' && ch <= '9')) { | |
| 4511 last_is_slash = false; | |
| 4512 continue; | |
| 4513 } | |
| 4514 if (slash_ok && ch == '/') { | |
| 4515 if (last_is_slash) { | |
| 4516 return NULL; // Don't permit consecutive slashes | |
| 4517 } | |
| 4518 last_is_slash = true; | |
| 4519 continue; | |
| 4520 } | |
| 4521 } else { | |
| 4522 jint unicode_ch; | |
| 4523 char* tmp_p = UTF8::next_character(p, &unicode_ch); | |
| 4524 p = tmp_p; | |
| 4525 last_is_slash = false; | |
| 4526 // Check if ch is Java identifier start or is Java identifier part | |
| 4527 // 4672820: call java.lang.Character methods directly without generating separate tables. | |
| 4528 EXCEPTION_MARK; | |
| 1142 | 4529 instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass()); |
| 0 | 4530 |
| 4531 // return value | |
| 4532 JavaValue result(T_BOOLEAN); | |
| 4533 // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart | |
| 4534 JavaCallArguments args; | |
| 4535 args.push_int(unicode_ch); | |
| 4536 | |
| 4537 // public static boolean isJavaIdentifierStart(char ch); | |
| 4538 JavaCalls::call_static(&result, | |
| 4539 klass, | |
|
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diff
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|
4540 vmSymbols::isJavaIdentifierStart_name(), |
|
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parents:
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diff
changeset
|
4541 vmSymbols::int_bool_signature(), |
| 0 | 4542 &args, |
| 4543 THREAD); | |
| 4544 | |
| 4545 if (HAS_PENDING_EXCEPTION) { | |
| 4546 CLEAR_PENDING_EXCEPTION; | |
| 4547 return 0; | |
| 4548 } | |
| 4549 if (result.get_jboolean()) { | |
| 4550 continue; | |
| 4551 } | |
| 4552 | |
| 4553 if (not_first_ch) { | |
| 4554 // public static boolean isJavaIdentifierPart(char ch); | |
| 4555 JavaCalls::call_static(&result, | |
| 4556 klass, | |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
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parents:
2085
diff
changeset
|
4557 vmSymbols::isJavaIdentifierPart_name(), |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2085
diff
changeset
|
4558 vmSymbols::int_bool_signature(), |
| 0 | 4559 &args, |
| 4560 THREAD); | |
| 4561 | |
| 4562 if (HAS_PENDING_EXCEPTION) { | |
| 4563 CLEAR_PENDING_EXCEPTION; | |
| 4564 return 0; | |
| 4565 } | |
| 4566 | |
| 4567 if (result.get_jboolean()) { | |
| 4568 continue; | |
| 4569 } | |
| 4570 } | |
| 4571 } | |
| 4572 return (not_first_ch) ? old_p : NULL; | |
| 4573 } | |
| 4574 return (not_first_ch) ? p : NULL; | |
| 4575 } | |
| 4576 | |
| 4577 | |
| 4578 // Take pointer to a string. Skip over the longest part of the string that could | |
| 4579 // be taken as a field signature. Allow "void" if void_ok. | |
| 4580 // Return a pointer to just past the signature. | |
| 4581 // Return NULL if no legal signature is found. | |
| 4582 char* ClassFileParser::skip_over_field_signature(char* signature, | |
| 4583 bool void_ok, | |
| 4584 unsigned int length, | |
| 4585 TRAPS) { | |
| 4586 unsigned int array_dim = 0; | |
| 4587 while (length > 0) { | |
| 4588 switch (signature[0]) { | |
| 4589 case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } | |
| 4590 case JVM_SIGNATURE_BOOLEAN: | |
| 4591 case JVM_SIGNATURE_BYTE: | |
| 4592 case JVM_SIGNATURE_CHAR: | |
| 4593 case JVM_SIGNATURE_SHORT: | |
| 4594 case JVM_SIGNATURE_INT: | |
| 4595 case JVM_SIGNATURE_FLOAT: | |
| 4596 case JVM_SIGNATURE_LONG: | |
| 4597 case JVM_SIGNATURE_DOUBLE: | |
| 4598 return signature + 1; | |
| 4599 case JVM_SIGNATURE_CLASS: { | |
| 4600 if (_major_version < JAVA_1_5_VERSION) { | |
| 4601 // Skip over the class name if one is there | |
| 4602 char* p = skip_over_field_name(signature + 1, true, --length); | |
| 4603 | |
| 4604 // The next character better be a semicolon | |
| 4605 if (p && (p - signature) > 1 && p[0] == ';') { | |
| 4606 return p + 1; | |
| 4607 } | |
| 4608 } else { | |
| 4609 // 4900761: For class version > 48, any unicode is allowed in class name. | |
| 4610 length--; | |
| 4611 signature++; | |
| 4612 while (length > 0 && signature[0] != ';') { | |
| 4613 if (signature[0] == '.') { | |
| 4614 classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); | |
| 4615 } | |
| 4616 length--; | |
| 4617 signature++; | |
| 4618 } | |
| 4619 if (signature[0] == ';') { return signature + 1; } | |
| 4620 } | |
| 4621 | |
| 4622 return NULL; | |
| 4623 } | |
| 4624 case JVM_SIGNATURE_ARRAY: | |
| 4625 array_dim++; | |
| 4626 if (array_dim > 255) { | |
| 4627 // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. | |
| 4628 classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); | |
| 4629 } | |
| 4630 // The rest of what's there better be a legal signature | |
| 4631 signature++; | |
| 4632 length--; | |
| 4633 void_ok = false; | |
| 4634 break; | |
| 4635 | |
| 4636 default: | |
| 4637 return NULL; | |
| 4638 } | |
| 4639 } | |
| 4640 return NULL; | |
| 4641 } |