1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/classfile/classFileParser.cpp Sat Dec 01 00:00:00 2007 +0000
1.3 @@ -0,0 +1,4014 @@
1.4 +/*
1.5 + * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.23 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.24 + * have any questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "incls/_precompiled.incl"
1.29 +#include "incls/_classFileParser.cpp.incl"
1.30 +
1.31 +// We generally try to create the oops directly when parsing, rather than allocating
1.32 +// temporary data structures and copying the bytes twice. A temporary area is only
1.33 +// needed when parsing utf8 entries in the constant pool and when parsing line number
1.34 +// tables.
1.35 +
1.36 +// We add assert in debug mode when class format is not checked.
1.37 +
1.38 +#define JAVA_CLASSFILE_MAGIC 0xCAFEBABE
1.39 +#define JAVA_MIN_SUPPORTED_VERSION 45
1.40 +#define JAVA_MAX_SUPPORTED_VERSION 50
1.41 +#define JAVA_MAX_SUPPORTED_MINOR_VERSION 0
1.42 +
1.43 +// Used for two backward compatibility reasons:
1.44 +// - to check for new additions to the class file format in JDK1.5
1.45 +// - to check for bug fixes in the format checker in JDK1.5
1.46 +#define JAVA_1_5_VERSION 49
1.47 +
1.48 +// Used for backward compatibility reasons:
1.49 +// - to check for javac bug fixes that happened after 1.5
1.50 +#define JAVA_6_VERSION 50
1.51 +
1.52 +
1.53 +void ClassFileParser::parse_constant_pool_entries(constantPoolHandle cp, int length, TRAPS) {
1.54 + // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize
1.55 + // this function (_current can be allocated in a register, with scalar
1.56 + // replacement of aggregates). The _current pointer is copied back to
1.57 + // stream() when this function returns. DON'T call another method within
1.58 + // this method that uses stream().
1.59 + ClassFileStream* cfs0 = stream();
1.60 + ClassFileStream cfs1 = *cfs0;
1.61 + ClassFileStream* cfs = &cfs1;
1.62 +#ifdef ASSERT
1.63 + u1* old_current = cfs0->current();
1.64 +#endif
1.65 +
1.66 + // Used for batching symbol allocations.
1.67 + const char* names[SymbolTable::symbol_alloc_batch_size];
1.68 + int lengths[SymbolTable::symbol_alloc_batch_size];
1.69 + int indices[SymbolTable::symbol_alloc_batch_size];
1.70 + unsigned int hashValues[SymbolTable::symbol_alloc_batch_size];
1.71 + int names_count = 0;
1.72 +
1.73 + // parsing Index 0 is unused
1.74 + for (int index = 1; index < length; index++) {
1.75 + // Each of the following case guarantees one more byte in the stream
1.76 + // for the following tag or the access_flags following constant pool,
1.77 + // so we don't need bounds-check for reading tag.
1.78 + u1 tag = cfs->get_u1_fast();
1.79 + switch (tag) {
1.80 + case JVM_CONSTANT_Class :
1.81 + {
1.82 + cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags
1.83 + u2 name_index = cfs->get_u2_fast();
1.84 + cp->klass_index_at_put(index, name_index);
1.85 + }
1.86 + break;
1.87 + case JVM_CONSTANT_Fieldref :
1.88 + {
1.89 + cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
1.90 + u2 class_index = cfs->get_u2_fast();
1.91 + u2 name_and_type_index = cfs->get_u2_fast();
1.92 + cp->field_at_put(index, class_index, name_and_type_index);
1.93 + }
1.94 + break;
1.95 + case JVM_CONSTANT_Methodref :
1.96 + {
1.97 + cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
1.98 + u2 class_index = cfs->get_u2_fast();
1.99 + u2 name_and_type_index = cfs->get_u2_fast();
1.100 + cp->method_at_put(index, class_index, name_and_type_index);
1.101 + }
1.102 + break;
1.103 + case JVM_CONSTANT_InterfaceMethodref :
1.104 + {
1.105 + cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags
1.106 + u2 class_index = cfs->get_u2_fast();
1.107 + u2 name_and_type_index = cfs->get_u2_fast();
1.108 + cp->interface_method_at_put(index, class_index, name_and_type_index);
1.109 + }
1.110 + break;
1.111 + case JVM_CONSTANT_String :
1.112 + {
1.113 + cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags
1.114 + u2 string_index = cfs->get_u2_fast();
1.115 + cp->string_index_at_put(index, string_index);
1.116 + }
1.117 + break;
1.118 + case JVM_CONSTANT_Integer :
1.119 + {
1.120 + cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
1.121 + u4 bytes = cfs->get_u4_fast();
1.122 + cp->int_at_put(index, (jint) bytes);
1.123 + }
1.124 + break;
1.125 + case JVM_CONSTANT_Float :
1.126 + {
1.127 + cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags
1.128 + u4 bytes = cfs->get_u4_fast();
1.129 + cp->float_at_put(index, *(jfloat*)&bytes);
1.130 + }
1.131 + break;
1.132 + case JVM_CONSTANT_Long :
1.133 + // A mangled type might cause you to overrun allocated memory
1.134 + guarantee_property(index+1 < length,
1.135 + "Invalid constant pool entry %u in class file %s",
1.136 + index, CHECK);
1.137 + {
1.138 + cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
1.139 + u8 bytes = cfs->get_u8_fast();
1.140 + cp->long_at_put(index, bytes);
1.141 + }
1.142 + index++; // Skip entry following eigth-byte constant, see JVM book p. 98
1.143 + break;
1.144 + case JVM_CONSTANT_Double :
1.145 + // A mangled type might cause you to overrun allocated memory
1.146 + guarantee_property(index+1 < length,
1.147 + "Invalid constant pool entry %u in class file %s",
1.148 + index, CHECK);
1.149 + {
1.150 + cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags
1.151 + u8 bytes = cfs->get_u8_fast();
1.152 + cp->double_at_put(index, *(jdouble*)&bytes);
1.153 + }
1.154 + index++; // Skip entry following eigth-byte constant, see JVM book p. 98
1.155 + break;
1.156 + case JVM_CONSTANT_NameAndType :
1.157 + {
1.158 + cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags
1.159 + u2 name_index = cfs->get_u2_fast();
1.160 + u2 signature_index = cfs->get_u2_fast();
1.161 + cp->name_and_type_at_put(index, name_index, signature_index);
1.162 + }
1.163 + break;
1.164 + case JVM_CONSTANT_Utf8 :
1.165 + {
1.166 + cfs->guarantee_more(2, CHECK); // utf8_length
1.167 + u2 utf8_length = cfs->get_u2_fast();
1.168 + u1* utf8_buffer = cfs->get_u1_buffer();
1.169 + assert(utf8_buffer != NULL, "null utf8 buffer");
1.170 + // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward.
1.171 + cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags
1.172 + cfs->skip_u1_fast(utf8_length);
1.173 + // Before storing the symbol, make sure it's legal
1.174 + if (_need_verify) {
1.175 + verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK);
1.176 + }
1.177 +
1.178 + unsigned int hash;
1.179 + symbolOop result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash);
1.180 + if (result == NULL) {
1.181 + names[names_count] = (char*)utf8_buffer;
1.182 + lengths[names_count] = utf8_length;
1.183 + indices[names_count] = index;
1.184 + hashValues[names_count++] = hash;
1.185 + if (names_count == SymbolTable::symbol_alloc_batch_size) {
1.186 + oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
1.187 + names_count = 0;
1.188 + }
1.189 + } else {
1.190 + cp->symbol_at_put(index, result);
1.191 + }
1.192 + }
1.193 + break;
1.194 + default:
1.195 + classfile_parse_error(
1.196 + "Unknown constant tag %u in class file %s", tag, CHECK);
1.197 + break;
1.198 + }
1.199 + }
1.200 +
1.201 + // Allocate the remaining symbols
1.202 + if (names_count > 0) {
1.203 + oopFactory::new_symbols(cp, names_count, names, lengths, indices, hashValues, CHECK);
1.204 + }
1.205 +
1.206 + // Copy _current pointer of local copy back to stream().
1.207 +#ifdef ASSERT
1.208 + assert(cfs0->current() == old_current, "non-exclusive use of stream()");
1.209 +#endif
1.210 + cfs0->set_current(cfs1.current());
1.211 +}
1.212 +
1.213 +bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); }
1.214 +
1.215 +constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) {
1.216 + ClassFileStream* cfs = stream();
1.217 + constantPoolHandle nullHandle;
1.218 +
1.219 + cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag
1.220 + u2 length = cfs->get_u2_fast();
1.221 + guarantee_property(
1.222 + length >= 1, "Illegal constant pool size %u in class file %s",
1.223 + length, CHECK_(nullHandle));
1.224 + constantPoolOop constant_pool =
1.225 + oopFactory::new_constantPool(length, CHECK_(nullHandle));
1.226 + constantPoolHandle cp (THREAD, constant_pool);
1.227 +
1.228 + cp->set_partially_loaded(); // Enables heap verify to work on partial constantPoolOops
1.229 +
1.230 + // parsing constant pool entries
1.231 + parse_constant_pool_entries(cp, length, CHECK_(nullHandle));
1.232 +
1.233 + int index = 1; // declared outside of loops for portability
1.234 +
1.235 + // first verification pass - validate cross references and fixup class and string constants
1.236 + for (index = 1; index < length; index++) { // Index 0 is unused
1.237 + switch (cp->tag_at(index).value()) {
1.238 + case JVM_CONSTANT_Class :
1.239 + ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
1.240 + break;
1.241 + case JVM_CONSTANT_Fieldref :
1.242 + // fall through
1.243 + case JVM_CONSTANT_Methodref :
1.244 + // fall through
1.245 + case JVM_CONSTANT_InterfaceMethodref : {
1.246 + if (!_need_verify) break;
1.247 + int klass_ref_index = cp->klass_ref_index_at(index);
1.248 + int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
1.249 + check_property(valid_cp_range(klass_ref_index, length) &&
1.250 + cp->tag_at(klass_ref_index).is_klass_reference(),
1.251 + "Invalid constant pool index %u in class file %s",
1.252 + klass_ref_index,
1.253 + CHECK_(nullHandle));
1.254 + check_property(valid_cp_range(name_and_type_ref_index, length) &&
1.255 + cp->tag_at(name_and_type_ref_index).is_name_and_type(),
1.256 + "Invalid constant pool index %u in class file %s",
1.257 + name_and_type_ref_index,
1.258 + CHECK_(nullHandle));
1.259 + break;
1.260 + }
1.261 + case JVM_CONSTANT_String :
1.262 + ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
1.263 + break;
1.264 + case JVM_CONSTANT_Integer :
1.265 + break;
1.266 + case JVM_CONSTANT_Float :
1.267 + break;
1.268 + case JVM_CONSTANT_Long :
1.269 + case JVM_CONSTANT_Double :
1.270 + index++;
1.271 + check_property(
1.272 + (index < length && cp->tag_at(index).is_invalid()),
1.273 + "Improper constant pool long/double index %u in class file %s",
1.274 + index, CHECK_(nullHandle));
1.275 + break;
1.276 + case JVM_CONSTANT_NameAndType : {
1.277 + if (!_need_verify) break;
1.278 + int name_ref_index = cp->name_ref_index_at(index);
1.279 + int signature_ref_index = cp->signature_ref_index_at(index);
1.280 + check_property(
1.281 + valid_cp_range(name_ref_index, length) &&
1.282 + cp->tag_at(name_ref_index).is_utf8(),
1.283 + "Invalid constant pool index %u in class file %s",
1.284 + name_ref_index, CHECK_(nullHandle));
1.285 + check_property(
1.286 + valid_cp_range(signature_ref_index, length) &&
1.287 + cp->tag_at(signature_ref_index).is_utf8(),
1.288 + "Invalid constant pool index %u in class file %s",
1.289 + signature_ref_index, CHECK_(nullHandle));
1.290 + break;
1.291 + }
1.292 + case JVM_CONSTANT_Utf8 :
1.293 + break;
1.294 + case JVM_CONSTANT_UnresolvedClass : // fall-through
1.295 + case JVM_CONSTANT_UnresolvedClassInError:
1.296 + ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present
1.297 + break;
1.298 + case JVM_CONSTANT_ClassIndex :
1.299 + {
1.300 + int class_index = cp->klass_index_at(index);
1.301 + check_property(
1.302 + valid_cp_range(class_index, length) &&
1.303 + cp->tag_at(class_index).is_utf8(),
1.304 + "Invalid constant pool index %u in class file %s",
1.305 + class_index, CHECK_(nullHandle));
1.306 + cp->unresolved_klass_at_put(index, cp->symbol_at(class_index));
1.307 + }
1.308 + break;
1.309 + case JVM_CONSTANT_UnresolvedString :
1.310 + ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present
1.311 + break;
1.312 + case JVM_CONSTANT_StringIndex :
1.313 + {
1.314 + int string_index = cp->string_index_at(index);
1.315 + check_property(
1.316 + valid_cp_range(string_index, length) &&
1.317 + cp->tag_at(string_index).is_utf8(),
1.318 + "Invalid constant pool index %u in class file %s",
1.319 + string_index, CHECK_(nullHandle));
1.320 + symbolOop sym = cp->symbol_at(string_index);
1.321 + cp->unresolved_string_at_put(index, sym);
1.322 + }
1.323 + break;
1.324 + default:
1.325 + fatal1("bad constant pool tag value %u", cp->tag_at(index).value());
1.326 + ShouldNotReachHere();
1.327 + break;
1.328 + } // end of switch
1.329 + } // end of for
1.330 +
1.331 + if (!_need_verify) {
1.332 + return cp;
1.333 + }
1.334 +
1.335 + // second verification pass - checks the strings are of the right format.
1.336 + for (index = 1; index < length; index++) {
1.337 + jbyte tag = cp->tag_at(index).value();
1.338 + switch (tag) {
1.339 + case JVM_CONSTANT_UnresolvedClass: {
1.340 + symbolHandle class_name(THREAD, cp->unresolved_klass_at(index));
1.341 + verify_legal_class_name(class_name, CHECK_(nullHandle));
1.342 + break;
1.343 + }
1.344 + case JVM_CONSTANT_Fieldref:
1.345 + case JVM_CONSTANT_Methodref:
1.346 + case JVM_CONSTANT_InterfaceMethodref: {
1.347 + int name_and_type_ref_index = cp->name_and_type_ref_index_at(index);
1.348 + // already verified to be utf8
1.349 + int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index);
1.350 + // already verified to be utf8
1.351 + int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index);
1.352 + symbolHandle name(THREAD, cp->symbol_at(name_ref_index));
1.353 + symbolHandle signature(THREAD, cp->symbol_at(signature_ref_index));
1.354 + if (tag == JVM_CONSTANT_Fieldref) {
1.355 + verify_legal_field_name(name, CHECK_(nullHandle));
1.356 + verify_legal_field_signature(name, signature, CHECK_(nullHandle));
1.357 + } else {
1.358 + verify_legal_method_name(name, CHECK_(nullHandle));
1.359 + verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1.360 + if (tag == JVM_CONSTANT_Methodref) {
1.361 + // 4509014: If a class method name begins with '<', it must be "<init>".
1.362 + assert(!name.is_null(), "method name in constant pool is null");
1.363 + unsigned int name_len = name->utf8_length();
1.364 + assert(name_len > 0, "bad method name"); // already verified as legal name
1.365 + if (name->byte_at(0) == '<') {
1.366 + if (name() != vmSymbols::object_initializer_name()) {
1.367 + classfile_parse_error(
1.368 + "Bad method name at constant pool index %u in class file %s",
1.369 + name_ref_index, CHECK_(nullHandle));
1.370 + }
1.371 + }
1.372 + }
1.373 + }
1.374 + break;
1.375 + }
1.376 + } // end of switch
1.377 + } // end of for
1.378 +
1.379 + return cp;
1.380 +}
1.381 +
1.382 +
1.383 +class NameSigHash: public ResourceObj {
1.384 + public:
1.385 + symbolOop _name; // name
1.386 + symbolOop _sig; // signature
1.387 + NameSigHash* _next; // Next entry in hash table
1.388 +};
1.389 +
1.390 +
1.391 +#define HASH_ROW_SIZE 256
1.392 +
1.393 +unsigned int hash(symbolOop name, symbolOop sig) {
1.394 + unsigned int raw_hash = 0;
1.395 + raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2);
1.396 + raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize;
1.397 +
1.398 + return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE;
1.399 +}
1.400 +
1.401 +
1.402 +void initialize_hashtable(NameSigHash** table) {
1.403 + memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE);
1.404 +}
1.405 +
1.406 +// Return false if the name/sig combination is found in table.
1.407 +// Return true if no duplicate is found. And name/sig is added as a new entry in table.
1.408 +// The old format checker uses heap sort to find duplicates.
1.409 +// NOTE: caller should guarantee that GC doesn't happen during the life cycle
1.410 +// of table since we don't expect symbolOop's to move.
1.411 +bool put_after_lookup(symbolOop name, symbolOop sig, NameSigHash** table) {
1.412 + assert(name != NULL, "name in constant pool is NULL");
1.413 +
1.414 + // First lookup for duplicates
1.415 + int index = hash(name, sig);
1.416 + NameSigHash* entry = table[index];
1.417 + while (entry != NULL) {
1.418 + if (entry->_name == name && entry->_sig == sig) {
1.419 + return false;
1.420 + }
1.421 + entry = entry->_next;
1.422 + }
1.423 +
1.424 + // No duplicate is found, allocate a new entry and fill it.
1.425 + entry = new NameSigHash();
1.426 + entry->_name = name;
1.427 + entry->_sig = sig;
1.428 +
1.429 + // Insert into hash table
1.430 + entry->_next = table[index];
1.431 + table[index] = entry;
1.432 +
1.433 + return true;
1.434 +}
1.435 +
1.436 +
1.437 +objArrayHandle ClassFileParser::parse_interfaces(constantPoolHandle cp,
1.438 + int length,
1.439 + Handle class_loader,
1.440 + Handle protection_domain,
1.441 + PerfTraceTime* vmtimer,
1.442 + symbolHandle class_name,
1.443 + TRAPS) {
1.444 + ClassFileStream* cfs = stream();
1.445 + assert(length > 0, "only called for length>0");
1.446 + objArrayHandle nullHandle;
1.447 + objArrayOop interface_oop = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1.448 + objArrayHandle interfaces (THREAD, interface_oop);
1.449 +
1.450 + int index;
1.451 + for (index = 0; index < length; index++) {
1.452 + u2 interface_index = cfs->get_u2(CHECK_(nullHandle));
1.453 + check_property(
1.454 + valid_cp_range(interface_index, cp->length()) &&
1.455 + cp->tag_at(interface_index).is_unresolved_klass(),
1.456 + "Interface name has bad constant pool index %u in class file %s",
1.457 + interface_index, CHECK_(nullHandle));
1.458 + symbolHandle unresolved_klass (THREAD, cp->klass_name_at(interface_index));
1.459 +
1.460 + // Don't need to check legal name because it's checked when parsing constant pool.
1.461 + // But need to make sure it's not an array type.
1.462 + guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY,
1.463 + "Bad interface name in class file %s", CHECK_(nullHandle));
1.464 +
1.465 + vmtimer->suspend(); // do not count recursive loading twice
1.466 + // Call resolve_super so classcircularity is checked
1.467 + klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
1.468 + unresolved_klass, class_loader, protection_domain,
1.469 + false, CHECK_(nullHandle));
1.470 + KlassHandle interf (THREAD, k);
1.471 + vmtimer->resume();
1.472 +
1.473 + if (!Klass::cast(interf())->is_interface()) {
1.474 + THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", nullHandle);
1.475 + }
1.476 + interfaces->obj_at_put(index, interf());
1.477 + }
1.478 +
1.479 + if (!_need_verify || length <= 1) {
1.480 + return interfaces;
1.481 + }
1.482 +
1.483 + // Check if there's any duplicates in interfaces
1.484 + ResourceMark rm(THREAD);
1.485 + NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD(
1.486 + THREAD, NameSigHash*, HASH_ROW_SIZE);
1.487 + initialize_hashtable(interface_names);
1.488 + bool dup = false;
1.489 + {
1.490 + debug_only(No_Safepoint_Verifier nsv;)
1.491 + for (index = 0; index < length; index++) {
1.492 + klassOop k = (klassOop)interfaces->obj_at(index);
1.493 + symbolOop name = instanceKlass::cast(k)->name();
1.494 + // If no duplicates, add (name, NULL) in hashtable interface_names.
1.495 + if (!put_after_lookup(name, NULL, interface_names)) {
1.496 + dup = true;
1.497 + break;
1.498 + }
1.499 + }
1.500 + }
1.501 + if (dup) {
1.502 + classfile_parse_error("Duplicate interface name in class file %s",
1.503 + CHECK_(nullHandle));
1.504 + }
1.505 +
1.506 + return interfaces;
1.507 +}
1.508 +
1.509 +
1.510 +void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, constantPoolHandle cp, TRAPS) {
1.511 + // Make sure the constant pool entry is of a type appropriate to this field
1.512 + guarantee_property(
1.513 + (constantvalue_index > 0 &&
1.514 + constantvalue_index < cp->length()),
1.515 + "Bad initial value index %u in ConstantValue attribute in class file %s",
1.516 + constantvalue_index, CHECK);
1.517 + constantTag value_type = cp->tag_at(constantvalue_index);
1.518 + switch ( cp->basic_type_for_signature_at(signature_index) ) {
1.519 + case T_LONG:
1.520 + guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK);
1.521 + break;
1.522 + case T_FLOAT:
1.523 + guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK);
1.524 + break;
1.525 + case T_DOUBLE:
1.526 + guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK);
1.527 + break;
1.528 + case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT:
1.529 + guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK);
1.530 + break;
1.531 + case T_OBJECT:
1.532 + guarantee_property((cp->symbol_at(signature_index)->equals("Ljava/lang/String;", 18)
1.533 + && (value_type.is_string() || value_type.is_unresolved_string())),
1.534 + "Bad string initial value in class file %s", CHECK);
1.535 + break;
1.536 + default:
1.537 + classfile_parse_error(
1.538 + "Unable to set initial value %u in class file %s",
1.539 + constantvalue_index, CHECK);
1.540 + }
1.541 +}
1.542 +
1.543 +
1.544 +// Parse attributes for a field.
1.545 +void ClassFileParser::parse_field_attributes(constantPoolHandle cp,
1.546 + u2 attributes_count,
1.547 + bool is_static, u2 signature_index,
1.548 + u2* constantvalue_index_addr,
1.549 + bool* is_synthetic_addr,
1.550 + u2* generic_signature_index_addr,
1.551 + typeArrayHandle* field_annotations,
1.552 + TRAPS) {
1.553 + ClassFileStream* cfs = stream();
1.554 + assert(attributes_count > 0, "length should be greater than 0");
1.555 + u2 constantvalue_index = 0;
1.556 + u2 generic_signature_index = 0;
1.557 + bool is_synthetic = false;
1.558 + u1* runtime_visible_annotations = NULL;
1.559 + int runtime_visible_annotations_length = 0;
1.560 + u1* runtime_invisible_annotations = NULL;
1.561 + int runtime_invisible_annotations_length = 0;
1.562 + while (attributes_count--) {
1.563 + cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1.564 + u2 attribute_name_index = cfs->get_u2_fast();
1.565 + u4 attribute_length = cfs->get_u4_fast();
1.566 + check_property(valid_cp_range(attribute_name_index, cp->length()) &&
1.567 + cp->tag_at(attribute_name_index).is_utf8(),
1.568 + "Invalid field attribute index %u in class file %s",
1.569 + attribute_name_index,
1.570 + CHECK);
1.571 + symbolOop attribute_name = cp->symbol_at(attribute_name_index);
1.572 + if (is_static && attribute_name == vmSymbols::tag_constant_value()) {
1.573 + // ignore if non-static
1.574 + if (constantvalue_index != 0) {
1.575 + classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK);
1.576 + }
1.577 + check_property(
1.578 + attribute_length == 2,
1.579 + "Invalid ConstantValue field attribute length %u in class file %s",
1.580 + attribute_length, CHECK);
1.581 + constantvalue_index = cfs->get_u2(CHECK);
1.582 + if (_need_verify) {
1.583 + verify_constantvalue(constantvalue_index, signature_index, cp, CHECK);
1.584 + }
1.585 + } else if (attribute_name == vmSymbols::tag_synthetic()) {
1.586 + if (attribute_length != 0) {
1.587 + classfile_parse_error(
1.588 + "Invalid Synthetic field attribute length %u in class file %s",
1.589 + attribute_length, CHECK);
1.590 + }
1.591 + is_synthetic = true;
1.592 + } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1.593 + if (attribute_length != 0) {
1.594 + classfile_parse_error(
1.595 + "Invalid Deprecated field attribute length %u in class file %s",
1.596 + attribute_length, CHECK);
1.597 + }
1.598 + } else if (_major_version >= JAVA_1_5_VERSION) {
1.599 + if (attribute_name == vmSymbols::tag_signature()) {
1.600 + if (attribute_length != 2) {
1.601 + classfile_parse_error(
1.602 + "Wrong size %u for field's Signature attribute in class file %s",
1.603 + attribute_length, CHECK);
1.604 + }
1.605 + generic_signature_index = cfs->get_u2(CHECK);
1.606 + } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1.607 + runtime_visible_annotations_length = attribute_length;
1.608 + runtime_visible_annotations = cfs->get_u1_buffer();
1.609 + assert(runtime_visible_annotations != NULL, "null visible annotations");
1.610 + cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1.611 + } else if (PreserveAllAnnotations && attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1.612 + runtime_invisible_annotations_length = attribute_length;
1.613 + runtime_invisible_annotations = cfs->get_u1_buffer();
1.614 + assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1.615 + cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
1.616 + } else {
1.617 + cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1.618 + }
1.619 + } else {
1.620 + cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes
1.621 + }
1.622 + }
1.623 +
1.624 + *constantvalue_index_addr = constantvalue_index;
1.625 + *is_synthetic_addr = is_synthetic;
1.626 + *generic_signature_index_addr = generic_signature_index;
1.627 + *field_annotations = assemble_annotations(runtime_visible_annotations,
1.628 + runtime_visible_annotations_length,
1.629 + runtime_invisible_annotations,
1.630 + runtime_invisible_annotations_length,
1.631 + CHECK);
1.632 + return;
1.633 +}
1.634 +
1.635 +
1.636 +// Field allocation types. Used for computing field offsets.
1.637 +
1.638 +enum FieldAllocationType {
1.639 + STATIC_OOP, // Oops
1.640 + STATIC_BYTE, // Boolean, Byte, char
1.641 + STATIC_SHORT, // shorts
1.642 + STATIC_WORD, // ints
1.643 + STATIC_DOUBLE, // long or double
1.644 + STATIC_ALIGNED_DOUBLE,// aligned long or double
1.645 + NONSTATIC_OOP,
1.646 + NONSTATIC_BYTE,
1.647 + NONSTATIC_SHORT,
1.648 + NONSTATIC_WORD,
1.649 + NONSTATIC_DOUBLE,
1.650 + NONSTATIC_ALIGNED_DOUBLE
1.651 +};
1.652 +
1.653 +
1.654 +struct FieldAllocationCount {
1.655 + int static_oop_count;
1.656 + int static_byte_count;
1.657 + int static_short_count;
1.658 + int static_word_count;
1.659 + int static_double_count;
1.660 + int nonstatic_oop_count;
1.661 + int nonstatic_byte_count;
1.662 + int nonstatic_short_count;
1.663 + int nonstatic_word_count;
1.664 + int nonstatic_double_count;
1.665 +};
1.666 +
1.667 +typeArrayHandle ClassFileParser::parse_fields(constantPoolHandle cp, bool is_interface,
1.668 + struct FieldAllocationCount *fac,
1.669 + objArrayHandle* fields_annotations, TRAPS) {
1.670 + ClassFileStream* cfs = stream();
1.671 + typeArrayHandle nullHandle;
1.672 + cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1.673 + u2 length = cfs->get_u2_fast();
1.674 + // Tuples of shorts [access, name index, sig index, initial value index, byte offset, generic signature index]
1.675 + typeArrayOop new_fields = oopFactory::new_permanent_shortArray(length*instanceKlass::next_offset, CHECK_(nullHandle));
1.676 + typeArrayHandle fields(THREAD, new_fields);
1.677 +
1.678 + int index = 0;
1.679 + typeArrayHandle field_annotations;
1.680 + for (int n = 0; n < length; n++) {
1.681 + cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1.682 +
1.683 + AccessFlags access_flags;
1.684 + jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS;
1.685 + verify_legal_field_modifiers(flags, is_interface, CHECK_(nullHandle));
1.686 + access_flags.set_flags(flags);
1.687 +
1.688 + u2 name_index = cfs->get_u2_fast();
1.689 + int cp_size = cp->length();
1.690 + check_property(
1.691 + valid_cp_range(name_index, cp_size) && cp->tag_at(name_index).is_utf8(),
1.692 + "Invalid constant pool index %u for field name in class file %s",
1.693 + name_index, CHECK_(nullHandle));
1.694 + symbolHandle name(THREAD, cp->symbol_at(name_index));
1.695 + verify_legal_field_name(name, CHECK_(nullHandle));
1.696 +
1.697 + u2 signature_index = cfs->get_u2_fast();
1.698 + check_property(
1.699 + valid_cp_range(signature_index, cp_size) &&
1.700 + cp->tag_at(signature_index).is_utf8(),
1.701 + "Invalid constant pool index %u for field signature in class file %s",
1.702 + signature_index, CHECK_(nullHandle));
1.703 + symbolHandle sig(THREAD, cp->symbol_at(signature_index));
1.704 + verify_legal_field_signature(name, sig, CHECK_(nullHandle));
1.705 +
1.706 + u2 constantvalue_index = 0;
1.707 + bool is_synthetic = false;
1.708 + u2 generic_signature_index = 0;
1.709 + bool is_static = access_flags.is_static();
1.710 +
1.711 + u2 attributes_count = cfs->get_u2_fast();
1.712 + if (attributes_count > 0) {
1.713 + parse_field_attributes(cp, attributes_count, is_static, signature_index,
1.714 + &constantvalue_index, &is_synthetic,
1.715 + &generic_signature_index, &field_annotations,
1.716 + CHECK_(nullHandle));
1.717 + if (field_annotations.not_null()) {
1.718 + if (fields_annotations->is_null()) {
1.719 + objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1.720 + *fields_annotations = objArrayHandle(THREAD, md);
1.721 + }
1.722 + (*fields_annotations)->obj_at_put(n, field_annotations());
1.723 + }
1.724 + if (is_synthetic) {
1.725 + access_flags.set_is_synthetic();
1.726 + }
1.727 + }
1.728 +
1.729 + fields->short_at_put(index++, access_flags.as_short());
1.730 + fields->short_at_put(index++, name_index);
1.731 + fields->short_at_put(index++, signature_index);
1.732 + fields->short_at_put(index++, constantvalue_index);
1.733 +
1.734 + // Remember how many oops we encountered and compute allocation type
1.735 + BasicType type = cp->basic_type_for_signature_at(signature_index);
1.736 + FieldAllocationType atype;
1.737 + if ( is_static ) {
1.738 + switch ( type ) {
1.739 + case T_BOOLEAN:
1.740 + case T_BYTE:
1.741 + fac->static_byte_count++;
1.742 + atype = STATIC_BYTE;
1.743 + break;
1.744 + case T_LONG:
1.745 + case T_DOUBLE:
1.746 + if (Universe::field_type_should_be_aligned(type)) {
1.747 + atype = STATIC_ALIGNED_DOUBLE;
1.748 + } else {
1.749 + atype = STATIC_DOUBLE;
1.750 + }
1.751 + fac->static_double_count++;
1.752 + break;
1.753 + case T_CHAR:
1.754 + case T_SHORT:
1.755 + fac->static_short_count++;
1.756 + atype = STATIC_SHORT;
1.757 + break;
1.758 + case T_FLOAT:
1.759 + case T_INT:
1.760 + fac->static_word_count++;
1.761 + atype = STATIC_WORD;
1.762 + break;
1.763 + case T_ARRAY:
1.764 + case T_OBJECT:
1.765 + fac->static_oop_count++;
1.766 + atype = STATIC_OOP;
1.767 + break;
1.768 + case T_ADDRESS:
1.769 + case T_VOID:
1.770 + default:
1.771 + assert(0, "bad field type");
1.772 + }
1.773 + } else {
1.774 + switch ( type ) {
1.775 + case T_BOOLEAN:
1.776 + case T_BYTE:
1.777 + fac->nonstatic_byte_count++;
1.778 + atype = NONSTATIC_BYTE;
1.779 + break;
1.780 + case T_LONG:
1.781 + case T_DOUBLE:
1.782 + if (Universe::field_type_should_be_aligned(type)) {
1.783 + atype = NONSTATIC_ALIGNED_DOUBLE;
1.784 + } else {
1.785 + atype = NONSTATIC_DOUBLE;
1.786 + }
1.787 + fac->nonstatic_double_count++;
1.788 + break;
1.789 + case T_CHAR:
1.790 + case T_SHORT:
1.791 + fac->nonstatic_short_count++;
1.792 + atype = NONSTATIC_SHORT;
1.793 + break;
1.794 + case T_FLOAT:
1.795 + case T_INT:
1.796 + fac->nonstatic_word_count++;
1.797 + atype = NONSTATIC_WORD;
1.798 + break;
1.799 + case T_ARRAY:
1.800 + case T_OBJECT:
1.801 + fac->nonstatic_oop_count++;
1.802 + atype = NONSTATIC_OOP;
1.803 + break;
1.804 + case T_ADDRESS:
1.805 + case T_VOID:
1.806 + default:
1.807 + assert(0, "bad field type");
1.808 + }
1.809 + }
1.810 +
1.811 + // The correct offset is computed later (all oop fields will be located together)
1.812 + // We temporarily store the allocation type in the offset field
1.813 + fields->short_at_put(index++, atype);
1.814 + fields->short_at_put(index++, 0); // Clear out high word of byte offset
1.815 + fields->short_at_put(index++, generic_signature_index);
1.816 + }
1.817 +
1.818 + if (_need_verify && length > 1) {
1.819 + // Check duplicated fields
1.820 + ResourceMark rm(THREAD);
1.821 + NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1.822 + THREAD, NameSigHash*, HASH_ROW_SIZE);
1.823 + initialize_hashtable(names_and_sigs);
1.824 + bool dup = false;
1.825 + {
1.826 + debug_only(No_Safepoint_Verifier nsv;)
1.827 + for (int i = 0; i < length*instanceKlass::next_offset; i += instanceKlass::next_offset) {
1.828 + int name_index = fields->ushort_at(i + instanceKlass::name_index_offset);
1.829 + symbolOop name = cp->symbol_at(name_index);
1.830 + int sig_index = fields->ushort_at(i + instanceKlass::signature_index_offset);
1.831 + symbolOop sig = cp->symbol_at(sig_index);
1.832 + // If no duplicates, add name/signature in hashtable names_and_sigs.
1.833 + if (!put_after_lookup(name, sig, names_and_sigs)) {
1.834 + dup = true;
1.835 + break;
1.836 + }
1.837 + }
1.838 + }
1.839 + if (dup) {
1.840 + classfile_parse_error("Duplicate field name&signature in class file %s",
1.841 + CHECK_(nullHandle));
1.842 + }
1.843 + }
1.844 +
1.845 + return fields;
1.846 +}
1.847 +
1.848 +
1.849 +static void copy_u2_with_conversion(u2* dest, u2* src, int length) {
1.850 + while (length-- > 0) {
1.851 + *dest++ = Bytes::get_Java_u2((u1*) (src++));
1.852 + }
1.853 +}
1.854 +
1.855 +
1.856 +typeArrayHandle ClassFileParser::parse_exception_table(u4 code_length,
1.857 + u4 exception_table_length,
1.858 + constantPoolHandle cp,
1.859 + TRAPS) {
1.860 + ClassFileStream* cfs = stream();
1.861 + typeArrayHandle nullHandle;
1.862 +
1.863 + // 4-tuples of ints [start_pc, end_pc, handler_pc, catch_type index]
1.864 + typeArrayOop eh = oopFactory::new_permanent_intArray(exception_table_length*4, CHECK_(nullHandle));
1.865 + typeArrayHandle exception_handlers = typeArrayHandle(THREAD, eh);
1.866 +
1.867 + int index = 0;
1.868 + cfs->guarantee_more(8 * exception_table_length, CHECK_(nullHandle)); // start_pc, end_pc, handler_pc, catch_type_index
1.869 + for (unsigned int i = 0; i < exception_table_length; i++) {
1.870 + u2 start_pc = cfs->get_u2_fast();
1.871 + u2 end_pc = cfs->get_u2_fast();
1.872 + u2 handler_pc = cfs->get_u2_fast();
1.873 + u2 catch_type_index = cfs->get_u2_fast();
1.874 + // Will check legal target after parsing code array in verifier.
1.875 + if (_need_verify) {
1.876 + guarantee_property((start_pc < end_pc) && (end_pc <= code_length),
1.877 + "Illegal exception table range in class file %s", CHECK_(nullHandle));
1.878 + guarantee_property(handler_pc < code_length,
1.879 + "Illegal exception table handler in class file %s", CHECK_(nullHandle));
1.880 + if (catch_type_index != 0) {
1.881 + guarantee_property(valid_cp_range(catch_type_index, cp->length()) &&
1.882 + (cp->tag_at(catch_type_index).is_klass() ||
1.883 + cp->tag_at(catch_type_index).is_unresolved_klass()),
1.884 + "Catch type in exception table has bad constant type in class file %s", CHECK_(nullHandle));
1.885 + }
1.886 + }
1.887 + exception_handlers->int_at_put(index++, start_pc);
1.888 + exception_handlers->int_at_put(index++, end_pc);
1.889 + exception_handlers->int_at_put(index++, handler_pc);
1.890 + exception_handlers->int_at_put(index++, catch_type_index);
1.891 + }
1.892 + return exception_handlers;
1.893 +}
1.894 +
1.895 +void ClassFileParser::parse_linenumber_table(
1.896 + u4 code_attribute_length, u4 code_length,
1.897 + CompressedLineNumberWriteStream** write_stream, TRAPS) {
1.898 + ClassFileStream* cfs = stream();
1.899 + unsigned int num_entries = cfs->get_u2(CHECK);
1.900 +
1.901 + // Each entry is a u2 start_pc, and a u2 line_number
1.902 + unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2));
1.903 +
1.904 + // Verify line number attribute and table length
1.905 + check_property(
1.906 + code_attribute_length == sizeof(u2) + length_in_bytes,
1.907 + "LineNumberTable attribute has wrong length in class file %s", CHECK);
1.908 +
1.909 + cfs->guarantee_more(length_in_bytes, CHECK);
1.910 +
1.911 + if ((*write_stream) == NULL) {
1.912 + if (length_in_bytes > fixed_buffer_size) {
1.913 + (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes);
1.914 + } else {
1.915 + (*write_stream) = new CompressedLineNumberWriteStream(
1.916 + linenumbertable_buffer, fixed_buffer_size);
1.917 + }
1.918 + }
1.919 +
1.920 + while (num_entries-- > 0) {
1.921 + u2 bci = cfs->get_u2_fast(); // start_pc
1.922 + u2 line = cfs->get_u2_fast(); // line_number
1.923 + guarantee_property(bci < code_length,
1.924 + "Invalid pc in LineNumberTable in class file %s", CHECK);
1.925 + (*write_stream)->write_pair(bci, line);
1.926 + }
1.927 +}
1.928 +
1.929 +
1.930 +// Class file LocalVariableTable elements.
1.931 +class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC {
1.932 + public:
1.933 + u2 start_bci;
1.934 + u2 length;
1.935 + u2 name_cp_index;
1.936 + u2 descriptor_cp_index;
1.937 + u2 slot;
1.938 +};
1.939 +
1.940 +
1.941 +class LVT_Hash: public CHeapObj {
1.942 + public:
1.943 + LocalVariableTableElement *_elem; // element
1.944 + LVT_Hash* _next; // Next entry in hash table
1.945 +};
1.946 +
1.947 +unsigned int hash(LocalVariableTableElement *elem) {
1.948 + unsigned int raw_hash = elem->start_bci;
1.949 +
1.950 + raw_hash = elem->length + raw_hash * 37;
1.951 + raw_hash = elem->name_cp_index + raw_hash * 37;
1.952 + raw_hash = elem->slot + raw_hash * 37;
1.953 +
1.954 + return raw_hash % HASH_ROW_SIZE;
1.955 +}
1.956 +
1.957 +void initialize_hashtable(LVT_Hash** table) {
1.958 + for (int i = 0; i < HASH_ROW_SIZE; i++) {
1.959 + table[i] = NULL;
1.960 + }
1.961 +}
1.962 +
1.963 +void clear_hashtable(LVT_Hash** table) {
1.964 + for (int i = 0; i < HASH_ROW_SIZE; i++) {
1.965 + LVT_Hash* current = table[i];
1.966 + LVT_Hash* next;
1.967 + while (current != NULL) {
1.968 + next = current->_next;
1.969 + current->_next = NULL;
1.970 + delete(current);
1.971 + current = next;
1.972 + }
1.973 + table[i] = NULL;
1.974 + }
1.975 +}
1.976 +
1.977 +LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) {
1.978 + LVT_Hash* entry = table[index];
1.979 +
1.980 + /*
1.981 + * 3-tuple start_bci/length/slot has to be unique key,
1.982 + * so the following comparison seems to be redundant:
1.983 + * && elem->name_cp_index == entry->_elem->name_cp_index
1.984 + */
1.985 + while (entry != NULL) {
1.986 + if (elem->start_bci == entry->_elem->start_bci
1.987 + && elem->length == entry->_elem->length
1.988 + && elem->name_cp_index == entry->_elem->name_cp_index
1.989 + && elem->slot == entry->_elem->slot
1.990 + ) {
1.991 + return entry;
1.992 + }
1.993 + entry = entry->_next;
1.994 + }
1.995 + return NULL;
1.996 +}
1.997 +
1.998 +// Return false if the local variable is found in table.
1.999 +// Return true if no duplicate is found.
1.1000 +// And local variable is added as a new entry in table.
1.1001 +bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) {
1.1002 + // First lookup for duplicates
1.1003 + int index = hash(elem);
1.1004 + LVT_Hash* entry = LVT_lookup(elem, index, table);
1.1005 +
1.1006 + if (entry != NULL) {
1.1007 + return false;
1.1008 + }
1.1009 + // No duplicate is found, allocate a new entry and fill it.
1.1010 + if ((entry = new LVT_Hash()) == NULL) {
1.1011 + return false;
1.1012 + }
1.1013 + entry->_elem = elem;
1.1014 +
1.1015 + // Insert into hash table
1.1016 + entry->_next = table[index];
1.1017 + table[index] = entry;
1.1018 +
1.1019 + return true;
1.1020 +}
1.1021 +
1.1022 +void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) {
1.1023 + lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci);
1.1024 + lvt->length = Bytes::get_Java_u2((u1*) &src->length);
1.1025 + lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index);
1.1026 + lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index);
1.1027 + lvt->signature_cp_index = 0;
1.1028 + lvt->slot = Bytes::get_Java_u2((u1*) &src->slot);
1.1029 +}
1.1030 +
1.1031 +// Function is used to parse both attributes:
1.1032 +// LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT)
1.1033 +u2* ClassFileParser::parse_localvariable_table(u4 code_length,
1.1034 + u2 max_locals,
1.1035 + u4 code_attribute_length,
1.1036 + constantPoolHandle cp,
1.1037 + u2* localvariable_table_length,
1.1038 + bool isLVTT,
1.1039 + TRAPS) {
1.1040 + ClassFileStream* cfs = stream();
1.1041 + const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable";
1.1042 + *localvariable_table_length = cfs->get_u2(CHECK_NULL);
1.1043 + unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2);
1.1044 + // Verify local variable table attribute has right length
1.1045 + if (_need_verify) {
1.1046 + guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)),
1.1047 + "%s has wrong length in class file %s", tbl_name, CHECK_NULL);
1.1048 + }
1.1049 + u2* localvariable_table_start = cfs->get_u2_buffer();
1.1050 + assert(localvariable_table_start != NULL, "null local variable table");
1.1051 + if (!_need_verify) {
1.1052 + cfs->skip_u2_fast(size);
1.1053 + } else {
1.1054 + cfs->guarantee_more(size * 2, CHECK_NULL);
1.1055 + for(int i = 0; i < (*localvariable_table_length); i++) {
1.1056 + u2 start_pc = cfs->get_u2_fast();
1.1057 + u2 length = cfs->get_u2_fast();
1.1058 + u2 name_index = cfs->get_u2_fast();
1.1059 + u2 descriptor_index = cfs->get_u2_fast();
1.1060 + u2 index = cfs->get_u2_fast();
1.1061 + // Assign to a u4 to avoid overflow
1.1062 + u4 end_pc = (u4)start_pc + (u4)length;
1.1063 +
1.1064 + if (start_pc >= code_length) {
1.1065 + classfile_parse_error(
1.1066 + "Invalid start_pc %u in %s in class file %s",
1.1067 + start_pc, tbl_name, CHECK_NULL);
1.1068 + }
1.1069 + if (end_pc > code_length) {
1.1070 + classfile_parse_error(
1.1071 + "Invalid length %u in %s in class file %s",
1.1072 + length, tbl_name, CHECK_NULL);
1.1073 + }
1.1074 + int cp_size = cp->length();
1.1075 + guarantee_property(
1.1076 + valid_cp_range(name_index, cp_size) &&
1.1077 + cp->tag_at(name_index).is_utf8(),
1.1078 + "Name index %u in %s has bad constant type in class file %s",
1.1079 + name_index, tbl_name, CHECK_NULL);
1.1080 + guarantee_property(
1.1081 + valid_cp_range(descriptor_index, cp_size) &&
1.1082 + cp->tag_at(descriptor_index).is_utf8(),
1.1083 + "Signature index %u in %s has bad constant type in class file %s",
1.1084 + descriptor_index, tbl_name, CHECK_NULL);
1.1085 +
1.1086 + symbolHandle name(THREAD, cp->symbol_at(name_index));
1.1087 + symbolHandle sig(THREAD, cp->symbol_at(descriptor_index));
1.1088 + verify_legal_field_name(name, CHECK_NULL);
1.1089 + u2 extra_slot = 0;
1.1090 + if (!isLVTT) {
1.1091 + verify_legal_field_signature(name, sig, CHECK_NULL);
1.1092 +
1.1093 + // 4894874: check special cases for double and long local variables
1.1094 + if (sig() == vmSymbols::type_signature(T_DOUBLE) ||
1.1095 + sig() == vmSymbols::type_signature(T_LONG)) {
1.1096 + extra_slot = 1;
1.1097 + }
1.1098 + }
1.1099 + guarantee_property((index + extra_slot) < max_locals,
1.1100 + "Invalid index %u in %s in class file %s",
1.1101 + index, tbl_name, CHECK_NULL);
1.1102 + }
1.1103 + }
1.1104 + return localvariable_table_start;
1.1105 +}
1.1106 +
1.1107 +
1.1108 +void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index,
1.1109 + u1* u1_array, u2* u2_array, constantPoolHandle cp, TRAPS) {
1.1110 + ClassFileStream* cfs = stream();
1.1111 + u2 index = 0; // index in the array with long/double occupying two slots
1.1112 + u4 i1 = *u1_index;
1.1113 + u4 i2 = *u2_index + 1;
1.1114 + for(int i = 0; i < array_length; i++) {
1.1115 + u1 tag = u1_array[i1++] = cfs->get_u1(CHECK);
1.1116 + index++;
1.1117 + if (tag == ITEM_Long || tag == ITEM_Double) {
1.1118 + index++;
1.1119 + } else if (tag == ITEM_Object) {
1.1120 + u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK);
1.1121 + guarantee_property(valid_cp_range(class_index, cp->length()) &&
1.1122 + cp->tag_at(class_index).is_unresolved_klass(),
1.1123 + "Bad class index %u in StackMap in class file %s",
1.1124 + class_index, CHECK);
1.1125 + } else if (tag == ITEM_Uninitialized) {
1.1126 + u2 offset = u2_array[i2++] = cfs->get_u2(CHECK);
1.1127 + guarantee_property(
1.1128 + offset < code_length,
1.1129 + "Bad uninitialized type offset %u in StackMap in class file %s",
1.1130 + offset, CHECK);
1.1131 + } else {
1.1132 + guarantee_property(
1.1133 + tag <= (u1)ITEM_Uninitialized,
1.1134 + "Unknown variable type %u in StackMap in class file %s",
1.1135 + tag, CHECK);
1.1136 + }
1.1137 + }
1.1138 + u2_array[*u2_index] = index;
1.1139 + *u1_index = i1;
1.1140 + *u2_index = i2;
1.1141 +}
1.1142 +
1.1143 +typeArrayOop ClassFileParser::parse_stackmap_table(
1.1144 + u4 code_attribute_length, TRAPS) {
1.1145 + if (code_attribute_length == 0)
1.1146 + return NULL;
1.1147 +
1.1148 + ClassFileStream* cfs = stream();
1.1149 + u1* stackmap_table_start = cfs->get_u1_buffer();
1.1150 + assert(stackmap_table_start != NULL, "null stackmap table");
1.1151 +
1.1152 + // check code_attribute_length first
1.1153 + stream()->skip_u1(code_attribute_length, CHECK_NULL);
1.1154 +
1.1155 + if (!_need_verify && !DumpSharedSpaces) {
1.1156 + return NULL;
1.1157 + }
1.1158 +
1.1159 + typeArrayOop stackmap_data =
1.1160 + oopFactory::new_permanent_byteArray(code_attribute_length, CHECK_NULL);
1.1161 +
1.1162 + stackmap_data->set_length(code_attribute_length);
1.1163 + memcpy((void*)stackmap_data->byte_at_addr(0),
1.1164 + (void*)stackmap_table_start, code_attribute_length);
1.1165 + return stackmap_data;
1.1166 +}
1.1167 +
1.1168 +u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length,
1.1169 + u4 method_attribute_length,
1.1170 + constantPoolHandle cp, TRAPS) {
1.1171 + ClassFileStream* cfs = stream();
1.1172 + cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length
1.1173 + *checked_exceptions_length = cfs->get_u2_fast();
1.1174 + unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2);
1.1175 + u2* checked_exceptions_start = cfs->get_u2_buffer();
1.1176 + assert(checked_exceptions_start != NULL, "null checked exceptions");
1.1177 + if (!_need_verify) {
1.1178 + cfs->skip_u2_fast(size);
1.1179 + } else {
1.1180 + // Verify each value in the checked exception table
1.1181 + u2 checked_exception;
1.1182 + u2 len = *checked_exceptions_length;
1.1183 + cfs->guarantee_more(2 * len, CHECK_NULL);
1.1184 + for (int i = 0; i < len; i++) {
1.1185 + checked_exception = cfs->get_u2_fast();
1.1186 + check_property(
1.1187 + valid_cp_range(checked_exception, cp->length()) &&
1.1188 + cp->tag_at(checked_exception).is_klass_reference(),
1.1189 + "Exception name has bad type at constant pool %u in class file %s",
1.1190 + checked_exception, CHECK_NULL);
1.1191 + }
1.1192 + }
1.1193 + // check exceptions attribute length
1.1194 + if (_need_verify) {
1.1195 + guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) +
1.1196 + sizeof(u2) * size),
1.1197 + "Exceptions attribute has wrong length in class file %s", CHECK_NULL);
1.1198 + }
1.1199 + return checked_exceptions_start;
1.1200 +}
1.1201 +
1.1202 +
1.1203 +#define MAX_ARGS_SIZE 255
1.1204 +#define MAX_CODE_SIZE 65535
1.1205 +#define INITIAL_MAX_LVT_NUMBER 256
1.1206 +
1.1207 +// Note: the parse_method below is big and clunky because all parsing of the code and exceptions
1.1208 +// attribute is inlined. This is curbersome to avoid since we inline most of the parts in the
1.1209 +// methodOop to save footprint, so we only know the size of the resulting methodOop when the
1.1210 +// entire method attribute is parsed.
1.1211 +//
1.1212 +// The promoted_flags parameter is used to pass relevant access_flags
1.1213 +// from the method back up to the containing klass. These flag values
1.1214 +// are added to klass's access_flags.
1.1215 +
1.1216 +methodHandle ClassFileParser::parse_method(constantPoolHandle cp, bool is_interface,
1.1217 + AccessFlags *promoted_flags,
1.1218 + typeArrayHandle* method_annotations,
1.1219 + typeArrayHandle* method_parameter_annotations,
1.1220 + typeArrayHandle* method_default_annotations,
1.1221 + TRAPS) {
1.1222 + ClassFileStream* cfs = stream();
1.1223 + methodHandle nullHandle;
1.1224 + ResourceMark rm(THREAD);
1.1225 + // Parse fixed parts
1.1226 + cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count
1.1227 +
1.1228 + int flags = cfs->get_u2_fast();
1.1229 + u2 name_index = cfs->get_u2_fast();
1.1230 + int cp_size = cp->length();
1.1231 + check_property(
1.1232 + valid_cp_range(name_index, cp_size) &&
1.1233 + cp->tag_at(name_index).is_utf8(),
1.1234 + "Illegal constant pool index %u for method name in class file %s",
1.1235 + name_index, CHECK_(nullHandle));
1.1236 + symbolHandle name(THREAD, cp->symbol_at(name_index));
1.1237 + verify_legal_method_name(name, CHECK_(nullHandle));
1.1238 +
1.1239 + u2 signature_index = cfs->get_u2_fast();
1.1240 + guarantee_property(
1.1241 + valid_cp_range(signature_index, cp_size) &&
1.1242 + cp->tag_at(signature_index).is_utf8(),
1.1243 + "Illegal constant pool index %u for method signature in class file %s",
1.1244 + signature_index, CHECK_(nullHandle));
1.1245 + symbolHandle signature(THREAD, cp->symbol_at(signature_index));
1.1246 +
1.1247 + AccessFlags access_flags;
1.1248 + if (name == vmSymbols::class_initializer_name()) {
1.1249 + // We ignore the access flags for a class initializer. (JVM Spec. p. 116)
1.1250 + flags = JVM_ACC_STATIC;
1.1251 + } else {
1.1252 + verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle));
1.1253 + }
1.1254 +
1.1255 + int args_size = -1; // only used when _need_verify is true
1.1256 + if (_need_verify) {
1.1257 + args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) +
1.1258 + verify_legal_method_signature(name, signature, CHECK_(nullHandle));
1.1259 + if (args_size > MAX_ARGS_SIZE) {
1.1260 + classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle));
1.1261 + }
1.1262 + }
1.1263 +
1.1264 + access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS);
1.1265 +
1.1266 + // Default values for code and exceptions attribute elements
1.1267 + u2 max_stack = 0;
1.1268 + u2 max_locals = 0;
1.1269 + u4 code_length = 0;
1.1270 + u1* code_start = 0;
1.1271 + u2 exception_table_length = 0;
1.1272 + typeArrayHandle exception_handlers(THREAD, Universe::the_empty_int_array());
1.1273 + u2 checked_exceptions_length = 0;
1.1274 + u2* checked_exceptions_start = NULL;
1.1275 + CompressedLineNumberWriteStream* linenumber_table = NULL;
1.1276 + int linenumber_table_length = 0;
1.1277 + int total_lvt_length = 0;
1.1278 + u2 lvt_cnt = 0;
1.1279 + u2 lvtt_cnt = 0;
1.1280 + bool lvt_allocated = false;
1.1281 + u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER;
1.1282 + u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER;
1.1283 + u2* localvariable_table_length;
1.1284 + u2** localvariable_table_start;
1.1285 + u2* localvariable_type_table_length;
1.1286 + u2** localvariable_type_table_start;
1.1287 + bool parsed_code_attribute = false;
1.1288 + bool parsed_checked_exceptions_attribute = false;
1.1289 + bool parsed_stackmap_attribute = false;
1.1290 + // stackmap attribute - JDK1.5
1.1291 + typeArrayHandle stackmap_data;
1.1292 + u2 generic_signature_index = 0;
1.1293 + u1* runtime_visible_annotations = NULL;
1.1294 + int runtime_visible_annotations_length = 0;
1.1295 + u1* runtime_invisible_annotations = NULL;
1.1296 + int runtime_invisible_annotations_length = 0;
1.1297 + u1* runtime_visible_parameter_annotations = NULL;
1.1298 + int runtime_visible_parameter_annotations_length = 0;
1.1299 + u1* runtime_invisible_parameter_annotations = NULL;
1.1300 + int runtime_invisible_parameter_annotations_length = 0;
1.1301 + u1* annotation_default = NULL;
1.1302 + int annotation_default_length = 0;
1.1303 +
1.1304 + // Parse code and exceptions attribute
1.1305 + u2 method_attributes_count = cfs->get_u2_fast();
1.1306 + while (method_attributes_count--) {
1.1307 + cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length
1.1308 + u2 method_attribute_name_index = cfs->get_u2_fast();
1.1309 + u4 method_attribute_length = cfs->get_u4_fast();
1.1310 + check_property(
1.1311 + valid_cp_range(method_attribute_name_index, cp_size) &&
1.1312 + cp->tag_at(method_attribute_name_index).is_utf8(),
1.1313 + "Invalid method attribute name index %u in class file %s",
1.1314 + method_attribute_name_index, CHECK_(nullHandle));
1.1315 +
1.1316 + symbolOop method_attribute_name = cp->symbol_at(method_attribute_name_index);
1.1317 + if (method_attribute_name == vmSymbols::tag_code()) {
1.1318 + // Parse Code attribute
1.1319 + if (_need_verify) {
1.1320 + guarantee_property(!access_flags.is_native() && !access_flags.is_abstract(),
1.1321 + "Code attribute in native or abstract methods in class file %s",
1.1322 + CHECK_(nullHandle));
1.1323 + }
1.1324 + if (parsed_code_attribute) {
1.1325 + classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle));
1.1326 + }
1.1327 + parsed_code_attribute = true;
1.1328 +
1.1329 + // Stack size, locals size, and code size
1.1330 + if (_major_version == 45 && _minor_version <= 2) {
1.1331 + cfs->guarantee_more(4, CHECK_(nullHandle));
1.1332 + max_stack = cfs->get_u1_fast();
1.1333 + max_locals = cfs->get_u1_fast();
1.1334 + code_length = cfs->get_u2_fast();
1.1335 + } else {
1.1336 + cfs->guarantee_more(8, CHECK_(nullHandle));
1.1337 + max_stack = cfs->get_u2_fast();
1.1338 + max_locals = cfs->get_u2_fast();
1.1339 + code_length = cfs->get_u4_fast();
1.1340 + }
1.1341 + if (_need_verify) {
1.1342 + guarantee_property(args_size <= max_locals,
1.1343 + "Arguments can't fit into locals in class file %s", CHECK_(nullHandle));
1.1344 + guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE,
1.1345 + "Invalid method Code length %u in class file %s",
1.1346 + code_length, CHECK_(nullHandle));
1.1347 + }
1.1348 + // Code pointer
1.1349 + code_start = cfs->get_u1_buffer();
1.1350 + assert(code_start != NULL, "null code start");
1.1351 + cfs->guarantee_more(code_length, CHECK_(nullHandle));
1.1352 + cfs->skip_u1_fast(code_length);
1.1353 +
1.1354 + // Exception handler table
1.1355 + cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length
1.1356 + exception_table_length = cfs->get_u2_fast();
1.1357 + if (exception_table_length > 0) {
1.1358 + exception_handlers =
1.1359 + parse_exception_table(code_length, exception_table_length, cp, CHECK_(nullHandle));
1.1360 + }
1.1361 +
1.1362 + // Parse additional attributes in code attribute
1.1363 + cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count
1.1364 + u2 code_attributes_count = cfs->get_u2_fast();
1.1365 + unsigned int calculated_attribute_length = sizeof(max_stack) +
1.1366 + sizeof(max_locals) +
1.1367 + sizeof(code_length) +
1.1368 + code_length +
1.1369 + sizeof(exception_table_length) +
1.1370 + sizeof(code_attributes_count) +
1.1371 + exception_table_length*(sizeof(u2) /* start_pc */+
1.1372 + sizeof(u2) /* end_pc */ +
1.1373 + sizeof(u2) /* handler_pc */ +
1.1374 + sizeof(u2) /* catch_type_index */);
1.1375 +
1.1376 + while (code_attributes_count--) {
1.1377 + cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length
1.1378 + u2 code_attribute_name_index = cfs->get_u2_fast();
1.1379 + u4 code_attribute_length = cfs->get_u4_fast();
1.1380 + calculated_attribute_length += code_attribute_length +
1.1381 + sizeof(code_attribute_name_index) +
1.1382 + sizeof(code_attribute_length);
1.1383 + check_property(valid_cp_range(code_attribute_name_index, cp_size) &&
1.1384 + cp->tag_at(code_attribute_name_index).is_utf8(),
1.1385 + "Invalid code attribute name index %u in class file %s",
1.1386 + code_attribute_name_index,
1.1387 + CHECK_(nullHandle));
1.1388 + if (LoadLineNumberTables &&
1.1389 + cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) {
1.1390 + // Parse and compress line number table
1.1391 + parse_linenumber_table(code_attribute_length, code_length,
1.1392 + &linenumber_table, CHECK_(nullHandle));
1.1393 +
1.1394 + } else if (LoadLocalVariableTables &&
1.1395 + cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) {
1.1396 + // Parse local variable table
1.1397 + if (!lvt_allocated) {
1.1398 + localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1399 + THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1.1400 + localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1401 + THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1.1402 + localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1403 + THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1.1404 + localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1405 + THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1.1406 + lvt_allocated = true;
1.1407 + }
1.1408 + if (lvt_cnt == max_lvt_cnt) {
1.1409 + max_lvt_cnt <<= 1;
1.1410 + REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt);
1.1411 + REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt);
1.1412 + }
1.1413 + localvariable_table_start[lvt_cnt] =
1.1414 + parse_localvariable_table(code_length,
1.1415 + max_locals,
1.1416 + code_attribute_length,
1.1417 + cp,
1.1418 + &localvariable_table_length[lvt_cnt],
1.1419 + false, // is not LVTT
1.1420 + CHECK_(nullHandle));
1.1421 + total_lvt_length += localvariable_table_length[lvt_cnt];
1.1422 + lvt_cnt++;
1.1423 + } else if (LoadLocalVariableTypeTables &&
1.1424 + _major_version >= JAVA_1_5_VERSION &&
1.1425 + cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) {
1.1426 + if (!lvt_allocated) {
1.1427 + localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1428 + THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1.1429 + localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1430 + THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1.1431 + localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1432 + THREAD, u2, INITIAL_MAX_LVT_NUMBER);
1.1433 + localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1434 + THREAD, u2*, INITIAL_MAX_LVT_NUMBER);
1.1435 + lvt_allocated = true;
1.1436 + }
1.1437 + // Parse local variable type table
1.1438 + if (lvtt_cnt == max_lvtt_cnt) {
1.1439 + max_lvtt_cnt <<= 1;
1.1440 + REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt);
1.1441 + REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt);
1.1442 + }
1.1443 + localvariable_type_table_start[lvtt_cnt] =
1.1444 + parse_localvariable_table(code_length,
1.1445 + max_locals,
1.1446 + code_attribute_length,
1.1447 + cp,
1.1448 + &localvariable_type_table_length[lvtt_cnt],
1.1449 + true, // is LVTT
1.1450 + CHECK_(nullHandle));
1.1451 + lvtt_cnt++;
1.1452 + } else if (UseSplitVerifier &&
1.1453 + _major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION &&
1.1454 + cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) {
1.1455 + // Stack map is only needed by the new verifier in JDK1.5.
1.1456 + if (parsed_stackmap_attribute) {
1.1457 + classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle));
1.1458 + }
1.1459 + typeArrayOop sm =
1.1460 + parse_stackmap_table(code_attribute_length, CHECK_(nullHandle));
1.1461 + stackmap_data = typeArrayHandle(THREAD, sm);
1.1462 + parsed_stackmap_attribute = true;
1.1463 + } else {
1.1464 + // Skip unknown attributes
1.1465 + cfs->skip_u1(code_attribute_length, CHECK_(nullHandle));
1.1466 + }
1.1467 + }
1.1468 + // check method attribute length
1.1469 + if (_need_verify) {
1.1470 + guarantee_property(method_attribute_length == calculated_attribute_length,
1.1471 + "Code segment has wrong length in class file %s", CHECK_(nullHandle));
1.1472 + }
1.1473 + } else if (method_attribute_name == vmSymbols::tag_exceptions()) {
1.1474 + // Parse Exceptions attribute
1.1475 + if (parsed_checked_exceptions_attribute) {
1.1476 + classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle));
1.1477 + }
1.1478 + parsed_checked_exceptions_attribute = true;
1.1479 + checked_exceptions_start =
1.1480 + parse_checked_exceptions(&checked_exceptions_length,
1.1481 + method_attribute_length,
1.1482 + cp, CHECK_(nullHandle));
1.1483 + } else if (method_attribute_name == vmSymbols::tag_synthetic()) {
1.1484 + if (method_attribute_length != 0) {
1.1485 + classfile_parse_error(
1.1486 + "Invalid Synthetic method attribute length %u in class file %s",
1.1487 + method_attribute_length, CHECK_(nullHandle));
1.1488 + }
1.1489 + // Should we check that there hasn't already been a synthetic attribute?
1.1490 + access_flags.set_is_synthetic();
1.1491 + } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120
1.1492 + if (method_attribute_length != 0) {
1.1493 + classfile_parse_error(
1.1494 + "Invalid Deprecated method attribute length %u in class file %s",
1.1495 + method_attribute_length, CHECK_(nullHandle));
1.1496 + }
1.1497 + } else if (_major_version >= JAVA_1_5_VERSION) {
1.1498 + if (method_attribute_name == vmSymbols::tag_signature()) {
1.1499 + if (method_attribute_length != 2) {
1.1500 + classfile_parse_error(
1.1501 + "Invalid Signature attribute length %u in class file %s",
1.1502 + method_attribute_length, CHECK_(nullHandle));
1.1503 + }
1.1504 + cfs->guarantee_more(2, CHECK_(nullHandle)); // generic_signature_index
1.1505 + generic_signature_index = cfs->get_u2_fast();
1.1506 + } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) {
1.1507 + runtime_visible_annotations_length = method_attribute_length;
1.1508 + runtime_visible_annotations = cfs->get_u1_buffer();
1.1509 + assert(runtime_visible_annotations != NULL, "null visible annotations");
1.1510 + cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle));
1.1511 + } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) {
1.1512 + runtime_invisible_annotations_length = method_attribute_length;
1.1513 + runtime_invisible_annotations = cfs->get_u1_buffer();
1.1514 + assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1.1515 + cfs->skip_u1(runtime_invisible_annotations_length, CHECK_(nullHandle));
1.1516 + } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) {
1.1517 + runtime_visible_parameter_annotations_length = method_attribute_length;
1.1518 + runtime_visible_parameter_annotations = cfs->get_u1_buffer();
1.1519 + assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations");
1.1520 + cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle));
1.1521 + } else if (PreserveAllAnnotations && method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) {
1.1522 + runtime_invisible_parameter_annotations_length = method_attribute_length;
1.1523 + runtime_invisible_parameter_annotations = cfs->get_u1_buffer();
1.1524 + assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations");
1.1525 + cfs->skip_u1(runtime_invisible_parameter_annotations_length, CHECK_(nullHandle));
1.1526 + } else if (method_attribute_name == vmSymbols::tag_annotation_default()) {
1.1527 + annotation_default_length = method_attribute_length;
1.1528 + annotation_default = cfs->get_u1_buffer();
1.1529 + assert(annotation_default != NULL, "null annotation default");
1.1530 + cfs->skip_u1(annotation_default_length, CHECK_(nullHandle));
1.1531 + } else {
1.1532 + // Skip unknown attributes
1.1533 + cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1.1534 + }
1.1535 + } else {
1.1536 + // Skip unknown attributes
1.1537 + cfs->skip_u1(method_attribute_length, CHECK_(nullHandle));
1.1538 + }
1.1539 + }
1.1540 +
1.1541 + if (linenumber_table != NULL) {
1.1542 + linenumber_table->write_terminator();
1.1543 + linenumber_table_length = linenumber_table->position();
1.1544 + }
1.1545 +
1.1546 + // Make sure there's at least one Code attribute in non-native/non-abstract method
1.1547 + if (_need_verify) {
1.1548 + guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute,
1.1549 + "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle));
1.1550 + }
1.1551 +
1.1552 + // All sizing information for a methodOop is finally available, now create it
1.1553 + methodOop m_oop = oopFactory::new_method(
1.1554 + code_length, access_flags, linenumber_table_length,
1.1555 + total_lvt_length, checked_exceptions_length, CHECK_(nullHandle));
1.1556 + methodHandle m (THREAD, m_oop);
1.1557 +
1.1558 + ClassLoadingService::add_class_method_size(m_oop->size()*HeapWordSize);
1.1559 +
1.1560 + // Fill in information from fixed part (access_flags already set)
1.1561 + m->set_constants(cp());
1.1562 + m->set_name_index(name_index);
1.1563 + m->set_signature_index(signature_index);
1.1564 + m->set_generic_signature_index(generic_signature_index);
1.1565 +#ifdef CC_INTERP
1.1566 + // hmm is there a gc issue here??
1.1567 + ResultTypeFinder rtf(cp->symbol_at(signature_index));
1.1568 + m->set_result_index(rtf.type());
1.1569 +#endif
1.1570 +
1.1571 + if (args_size >= 0) {
1.1572 + m->set_size_of_parameters(args_size);
1.1573 + } else {
1.1574 + m->compute_size_of_parameters(THREAD);
1.1575 + }
1.1576 +#ifdef ASSERT
1.1577 + if (args_size >= 0) {
1.1578 + m->compute_size_of_parameters(THREAD);
1.1579 + assert(args_size == m->size_of_parameters(), "");
1.1580 + }
1.1581 +#endif
1.1582 +
1.1583 + // Fill in code attribute information
1.1584 + m->set_max_stack(max_stack);
1.1585 + m->set_max_locals(max_locals);
1.1586 + m->constMethod()->set_stackmap_data(stackmap_data());
1.1587 +
1.1588 + /**
1.1589 + * The exception_table field is the flag used to indicate
1.1590 + * that the methodOop and it's associated constMethodOop are partially
1.1591 + * initialized and thus are exempt from pre/post GC verification. Once
1.1592 + * the field is set, the oops are considered fully initialized so make
1.1593 + * sure that the oops can pass verification when this field is set.
1.1594 + */
1.1595 + m->set_exception_table(exception_handlers());
1.1596 +
1.1597 + // Copy byte codes
1.1598 + if (code_length > 0) {
1.1599 + memcpy(m->code_base(), code_start, code_length);
1.1600 + }
1.1601 +
1.1602 + // Copy line number table
1.1603 + if (linenumber_table != NULL) {
1.1604 + memcpy(m->compressed_linenumber_table(),
1.1605 + linenumber_table->buffer(), linenumber_table_length);
1.1606 + }
1.1607 +
1.1608 + // Copy checked exceptions
1.1609 + if (checked_exceptions_length > 0) {
1.1610 + int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2);
1.1611 + copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size);
1.1612 + }
1.1613 +
1.1614 + /* Copy class file LVT's/LVTT's into the HotSpot internal LVT.
1.1615 + *
1.1616 + * Rules for LVT's and LVTT's are:
1.1617 + * - There can be any number of LVT's and LVTT's.
1.1618 + * - If there are n LVT's, it is the same as if there was just
1.1619 + * one LVT containing all the entries from the n LVT's.
1.1620 + * - There may be no more than one LVT entry per local variable.
1.1621 + * Two LVT entries are 'equal' if these fields are the same:
1.1622 + * start_pc, length, name, slot
1.1623 + * - There may be no more than one LVTT entry per each LVT entry.
1.1624 + * Each LVTT entry has to match some LVT entry.
1.1625 + * - HotSpot internal LVT keeps natural ordering of class file LVT entries.
1.1626 + */
1.1627 + if (total_lvt_length > 0) {
1.1628 + int tbl_no, idx;
1.1629 +
1.1630 + promoted_flags->set_has_localvariable_table();
1.1631 +
1.1632 + LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE);
1.1633 + initialize_hashtable(lvt_Hash);
1.1634 +
1.1635 + // To fill LocalVariableTable in
1.1636 + Classfile_LVT_Element* cf_lvt;
1.1637 + LocalVariableTableElement* lvt = m->localvariable_table_start();
1.1638 +
1.1639 + for (tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) {
1.1640 + cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no];
1.1641 + for (idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) {
1.1642 + copy_lvt_element(&cf_lvt[idx], lvt);
1.1643 + // If no duplicates, add LVT elem in hashtable lvt_Hash.
1.1644 + if (LVT_put_after_lookup(lvt, lvt_Hash) == false
1.1645 + && _need_verify
1.1646 + && _major_version >= JAVA_1_5_VERSION ) {
1.1647 + clear_hashtable(lvt_Hash);
1.1648 + classfile_parse_error("Duplicated LocalVariableTable attribute "
1.1649 + "entry for '%s' in class file %s",
1.1650 + cp->symbol_at(lvt->name_cp_index)->as_utf8(),
1.1651 + CHECK_(nullHandle));
1.1652 + }
1.1653 + }
1.1654 + }
1.1655 +
1.1656 + // To merge LocalVariableTable and LocalVariableTypeTable
1.1657 + Classfile_LVT_Element* cf_lvtt;
1.1658 + LocalVariableTableElement lvtt_elem;
1.1659 +
1.1660 + for (tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) {
1.1661 + cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no];
1.1662 + for (idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) {
1.1663 + copy_lvt_element(&cf_lvtt[idx], &lvtt_elem);
1.1664 + int index = hash(&lvtt_elem);
1.1665 + LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash);
1.1666 + if (entry == NULL) {
1.1667 + if (_need_verify) {
1.1668 + clear_hashtable(lvt_Hash);
1.1669 + classfile_parse_error("LVTT entry for '%s' in class file %s "
1.1670 + "does not match any LVT entry",
1.1671 + cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1.1672 + CHECK_(nullHandle));
1.1673 + }
1.1674 + } else if (entry->_elem->signature_cp_index != 0 && _need_verify) {
1.1675 + clear_hashtable(lvt_Hash);
1.1676 + classfile_parse_error("Duplicated LocalVariableTypeTable attribute "
1.1677 + "entry for '%s' in class file %s",
1.1678 + cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(),
1.1679 + CHECK_(nullHandle));
1.1680 + } else {
1.1681 + // to add generic signatures into LocalVariableTable
1.1682 + entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index;
1.1683 + }
1.1684 + }
1.1685 + }
1.1686 + clear_hashtable(lvt_Hash);
1.1687 + }
1.1688 +
1.1689 + *method_annotations = assemble_annotations(runtime_visible_annotations,
1.1690 + runtime_visible_annotations_length,
1.1691 + runtime_invisible_annotations,
1.1692 + runtime_invisible_annotations_length,
1.1693 + CHECK_(nullHandle));
1.1694 + *method_parameter_annotations = assemble_annotations(runtime_visible_parameter_annotations,
1.1695 + runtime_visible_parameter_annotations_length,
1.1696 + runtime_invisible_parameter_annotations,
1.1697 + runtime_invisible_parameter_annotations_length,
1.1698 + CHECK_(nullHandle));
1.1699 + *method_default_annotations = assemble_annotations(annotation_default,
1.1700 + annotation_default_length,
1.1701 + NULL,
1.1702 + 0,
1.1703 + CHECK_(nullHandle));
1.1704 +
1.1705 + if (name() == vmSymbols::finalize_method_name() &&
1.1706 + signature() == vmSymbols::void_method_signature()) {
1.1707 + if (m->is_empty_method()) {
1.1708 + _has_empty_finalizer = true;
1.1709 + } else {
1.1710 + _has_finalizer = true;
1.1711 + }
1.1712 + }
1.1713 + if (name() == vmSymbols::object_initializer_name() &&
1.1714 + signature() == vmSymbols::void_method_signature() &&
1.1715 + m->is_vanilla_constructor()) {
1.1716 + _has_vanilla_constructor = true;
1.1717 + }
1.1718 +
1.1719 + return m;
1.1720 +}
1.1721 +
1.1722 +
1.1723 +// The promoted_flags parameter is used to pass relevant access_flags
1.1724 +// from the methods back up to the containing klass. These flag values
1.1725 +// are added to klass's access_flags.
1.1726 +
1.1727 +objArrayHandle ClassFileParser::parse_methods(constantPoolHandle cp, bool is_interface,
1.1728 + AccessFlags* promoted_flags,
1.1729 + bool* has_final_method,
1.1730 + objArrayOop* methods_annotations_oop,
1.1731 + objArrayOop* methods_parameter_annotations_oop,
1.1732 + objArrayOop* methods_default_annotations_oop,
1.1733 + TRAPS) {
1.1734 + ClassFileStream* cfs = stream();
1.1735 + objArrayHandle nullHandle;
1.1736 + typeArrayHandle method_annotations;
1.1737 + typeArrayHandle method_parameter_annotations;
1.1738 + typeArrayHandle method_default_annotations;
1.1739 + cfs->guarantee_more(2, CHECK_(nullHandle)); // length
1.1740 + u2 length = cfs->get_u2_fast();
1.1741 + if (length == 0) {
1.1742 + return objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
1.1743 + } else {
1.1744 + objArrayOop m = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1.1745 + objArrayHandle methods(THREAD, m);
1.1746 + HandleMark hm(THREAD);
1.1747 + objArrayHandle methods_annotations;
1.1748 + objArrayHandle methods_parameter_annotations;
1.1749 + objArrayHandle methods_default_annotations;
1.1750 + for (int index = 0; index < length; index++) {
1.1751 + methodHandle method = parse_method(cp, is_interface,
1.1752 + promoted_flags,
1.1753 + &method_annotations,
1.1754 + &method_parameter_annotations,
1.1755 + &method_default_annotations,
1.1756 + CHECK_(nullHandle));
1.1757 + if (method->is_final()) {
1.1758 + *has_final_method = true;
1.1759 + }
1.1760 + methods->obj_at_put(index, method());
1.1761 + if (method_annotations.not_null()) {
1.1762 + if (methods_annotations.is_null()) {
1.1763 + objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1.1764 + methods_annotations = objArrayHandle(THREAD, md);
1.1765 + }
1.1766 + methods_annotations->obj_at_put(index, method_annotations());
1.1767 + }
1.1768 + if (method_parameter_annotations.not_null()) {
1.1769 + if (methods_parameter_annotations.is_null()) {
1.1770 + objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1.1771 + methods_parameter_annotations = objArrayHandle(THREAD, md);
1.1772 + }
1.1773 + methods_parameter_annotations->obj_at_put(index, method_parameter_annotations());
1.1774 + }
1.1775 + if (method_default_annotations.not_null()) {
1.1776 + if (methods_default_annotations.is_null()) {
1.1777 + objArrayOop md = oopFactory::new_system_objArray(length, CHECK_(nullHandle));
1.1778 + methods_default_annotations = objArrayHandle(THREAD, md);
1.1779 + }
1.1780 + methods_default_annotations->obj_at_put(index, method_default_annotations());
1.1781 + }
1.1782 + }
1.1783 + if (_need_verify && length > 1) {
1.1784 + // Check duplicated methods
1.1785 + ResourceMark rm(THREAD);
1.1786 + NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD(
1.1787 + THREAD, NameSigHash*, HASH_ROW_SIZE);
1.1788 + initialize_hashtable(names_and_sigs);
1.1789 + bool dup = false;
1.1790 + {
1.1791 + debug_only(No_Safepoint_Verifier nsv;)
1.1792 + for (int i = 0; i < length; i++) {
1.1793 + methodOop m = (methodOop)methods->obj_at(i);
1.1794 + // If no duplicates, add name/signature in hashtable names_and_sigs.
1.1795 + if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) {
1.1796 + dup = true;
1.1797 + break;
1.1798 + }
1.1799 + }
1.1800 + }
1.1801 + if (dup) {
1.1802 + classfile_parse_error("Duplicate method name&signature in class file %s",
1.1803 + CHECK_(nullHandle));
1.1804 + }
1.1805 + }
1.1806 +
1.1807 + *methods_annotations_oop = methods_annotations();
1.1808 + *methods_parameter_annotations_oop = methods_parameter_annotations();
1.1809 + *methods_default_annotations_oop = methods_default_annotations();
1.1810 +
1.1811 + return methods;
1.1812 + }
1.1813 +}
1.1814 +
1.1815 +
1.1816 +typeArrayHandle ClassFileParser::sort_methods(objArrayHandle methods,
1.1817 + objArrayHandle methods_annotations,
1.1818 + objArrayHandle methods_parameter_annotations,
1.1819 + objArrayHandle methods_default_annotations,
1.1820 + TRAPS) {
1.1821 + typeArrayHandle nullHandle;
1.1822 + int length = methods()->length();
1.1823 + // If JVMTI original method ordering is enabled we have to
1.1824 + // remember the original class file ordering.
1.1825 + // We temporarily use the vtable_index field in the methodOop to store the
1.1826 + // class file index, so we can read in after calling qsort.
1.1827 + if (JvmtiExport::can_maintain_original_method_order()) {
1.1828 + for (int index = 0; index < length; index++) {
1.1829 + methodOop m = methodOop(methods->obj_at(index));
1.1830 + assert(!m->valid_vtable_index(), "vtable index should not be set");
1.1831 + m->set_vtable_index(index);
1.1832 + }
1.1833 + }
1.1834 + // Sort method array by ascending method name (for faster lookups & vtable construction)
1.1835 + // Note that the ordering is not alphabetical, see symbolOopDesc::fast_compare
1.1836 + methodOopDesc::sort_methods(methods(),
1.1837 + methods_annotations(),
1.1838 + methods_parameter_annotations(),
1.1839 + methods_default_annotations());
1.1840 +
1.1841 + // If JVMTI original method ordering is enabled construct int array remembering the original ordering
1.1842 + if (JvmtiExport::can_maintain_original_method_order()) {
1.1843 + typeArrayOop new_ordering = oopFactory::new_permanent_intArray(length, CHECK_(nullHandle));
1.1844 + typeArrayHandle method_ordering(THREAD, new_ordering);
1.1845 + for (int index = 0; index < length; index++) {
1.1846 + methodOop m = methodOop(methods->obj_at(index));
1.1847 + int old_index = m->vtable_index();
1.1848 + assert(old_index >= 0 && old_index < length, "invalid method index");
1.1849 + method_ordering->int_at_put(index, old_index);
1.1850 + m->set_vtable_index(methodOopDesc::invalid_vtable_index);
1.1851 + }
1.1852 + return method_ordering;
1.1853 + } else {
1.1854 + return typeArrayHandle(THREAD, Universe::the_empty_int_array());
1.1855 + }
1.1856 +}
1.1857 +
1.1858 +
1.1859 +void ClassFileParser::parse_classfile_sourcefile_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
1.1860 + ClassFileStream* cfs = stream();
1.1861 + cfs->guarantee_more(2, CHECK); // sourcefile_index
1.1862 + u2 sourcefile_index = cfs->get_u2_fast();
1.1863 + check_property(
1.1864 + valid_cp_range(sourcefile_index, cp->length()) &&
1.1865 + cp->tag_at(sourcefile_index).is_utf8(),
1.1866 + "Invalid SourceFile attribute at constant pool index %u in class file %s",
1.1867 + sourcefile_index, CHECK);
1.1868 + k->set_source_file_name(cp->symbol_at(sourcefile_index));
1.1869 +}
1.1870 +
1.1871 +
1.1872 +
1.1873 +void ClassFileParser::parse_classfile_source_debug_extension_attribute(constantPoolHandle cp,
1.1874 + instanceKlassHandle k,
1.1875 + int length, TRAPS) {
1.1876 + ClassFileStream* cfs = stream();
1.1877 + u1* sde_buffer = cfs->get_u1_buffer();
1.1878 + assert(sde_buffer != NULL, "null sde buffer");
1.1879 +
1.1880 + // Don't bother storing it if there is no way to retrieve it
1.1881 + if (JvmtiExport::can_get_source_debug_extension()) {
1.1882 + // Optimistically assume that only 1 byte UTF format is used
1.1883 + // (common case)
1.1884 + symbolOop sde_symbol = oopFactory::new_symbol((char*)sde_buffer,
1.1885 + length, CHECK);
1.1886 + k->set_source_debug_extension(sde_symbol);
1.1887 + }
1.1888 + // Got utf8 string, set stream position forward
1.1889 + cfs->skip_u1(length, CHECK);
1.1890 +}
1.1891 +
1.1892 +
1.1893 +// Inner classes can be static, private or protected (classic VM does this)
1.1894 +#define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC)
1.1895 +
1.1896 +// Return number of classes in the inner classes attribute table
1.1897 +u2 ClassFileParser::parse_classfile_inner_classes_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
1.1898 + ClassFileStream* cfs = stream();
1.1899 + cfs->guarantee_more(2, CHECK_0); // length
1.1900 + u2 length = cfs->get_u2_fast();
1.1901 +
1.1902 + // 4-tuples of shorts [inner_class_info_index, outer_class_info_index, inner_name_index, inner_class_access_flags]
1.1903 + typeArrayOop ic = oopFactory::new_permanent_shortArray(length*4, CHECK_0);
1.1904 + typeArrayHandle inner_classes(THREAD, ic);
1.1905 + int index = 0;
1.1906 + int cp_size = cp->length();
1.1907 + cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2
1.1908 + for (int n = 0; n < length; n++) {
1.1909 + // Inner class index
1.1910 + u2 inner_class_info_index = cfs->get_u2_fast();
1.1911 + check_property(
1.1912 + inner_class_info_index == 0 ||
1.1913 + (valid_cp_range(inner_class_info_index, cp_size) &&
1.1914 + cp->tag_at(inner_class_info_index).is_klass_reference()),
1.1915 + "inner_class_info_index %u has bad constant type in class file %s",
1.1916 + inner_class_info_index, CHECK_0);
1.1917 + // Outer class index
1.1918 + u2 outer_class_info_index = cfs->get_u2_fast();
1.1919 + check_property(
1.1920 + outer_class_info_index == 0 ||
1.1921 + (valid_cp_range(outer_class_info_index, cp_size) &&
1.1922 + cp->tag_at(outer_class_info_index).is_klass_reference()),
1.1923 + "outer_class_info_index %u has bad constant type in class file %s",
1.1924 + outer_class_info_index, CHECK_0);
1.1925 + // Inner class name
1.1926 + u2 inner_name_index = cfs->get_u2_fast();
1.1927 + check_property(
1.1928 + inner_name_index == 0 || (valid_cp_range(inner_name_index, cp_size) &&
1.1929 + cp->tag_at(inner_name_index).is_utf8()),
1.1930 + "inner_name_index %u has bad constant type in class file %s",
1.1931 + inner_name_index, CHECK_0);
1.1932 + if (_need_verify) {
1.1933 + guarantee_property(inner_class_info_index != outer_class_info_index,
1.1934 + "Class is both outer and inner class in class file %s", CHECK_0);
1.1935 + }
1.1936 + // Access flags
1.1937 + AccessFlags inner_access_flags;
1.1938 + jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS;
1.1939 + if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
1.1940 + // Set abstract bit for old class files for backward compatibility
1.1941 + flags |= JVM_ACC_ABSTRACT;
1.1942 + }
1.1943 + verify_legal_class_modifiers(flags, CHECK_0);
1.1944 + inner_access_flags.set_flags(flags);
1.1945 +
1.1946 + inner_classes->short_at_put(index++, inner_class_info_index);
1.1947 + inner_classes->short_at_put(index++, outer_class_info_index);
1.1948 + inner_classes->short_at_put(index++, inner_name_index);
1.1949 + inner_classes->short_at_put(index++, inner_access_flags.as_short());
1.1950 + }
1.1951 +
1.1952 + // 4347400: make sure there's no duplicate entry in the classes array
1.1953 + if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
1.1954 + for(int i = 0; i < inner_classes->length(); i += 4) {
1.1955 + for(int j = i + 4; j < inner_classes->length(); j += 4) {
1.1956 + guarantee_property((inner_classes->ushort_at(i) != inner_classes->ushort_at(j) ||
1.1957 + inner_classes->ushort_at(i+1) != inner_classes->ushort_at(j+1) ||
1.1958 + inner_classes->ushort_at(i+2) != inner_classes->ushort_at(j+2) ||
1.1959 + inner_classes->ushort_at(i+3) != inner_classes->ushort_at(j+3)),
1.1960 + "Duplicate entry in InnerClasses in class file %s",
1.1961 + CHECK_0);
1.1962 + }
1.1963 + }
1.1964 + }
1.1965 +
1.1966 + // Update instanceKlass with inner class info.
1.1967 + k->set_inner_classes(inner_classes());
1.1968 + return length;
1.1969 +}
1.1970 +
1.1971 +void ClassFileParser::parse_classfile_synthetic_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
1.1972 + k->set_is_synthetic();
1.1973 +}
1.1974 +
1.1975 +void ClassFileParser::parse_classfile_signature_attribute(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
1.1976 + ClassFileStream* cfs = stream();
1.1977 + u2 signature_index = cfs->get_u2(CHECK);
1.1978 + check_property(
1.1979 + valid_cp_range(signature_index, cp->length()) &&
1.1980 + cp->tag_at(signature_index).is_utf8(),
1.1981 + "Invalid constant pool index %u in Signature attribute in class file %s",
1.1982 + signature_index, CHECK);
1.1983 + k->set_generic_signature(cp->symbol_at(signature_index));
1.1984 +}
1.1985 +
1.1986 +void ClassFileParser::parse_classfile_attributes(constantPoolHandle cp, instanceKlassHandle k, TRAPS) {
1.1987 + ClassFileStream* cfs = stream();
1.1988 + // Set inner classes attribute to default sentinel
1.1989 + k->set_inner_classes(Universe::the_empty_short_array());
1.1990 + cfs->guarantee_more(2, CHECK); // attributes_count
1.1991 + u2 attributes_count = cfs->get_u2_fast();
1.1992 + bool parsed_sourcefile_attribute = false;
1.1993 + bool parsed_innerclasses_attribute = false;
1.1994 + bool parsed_enclosingmethod_attribute = false;
1.1995 + u1* runtime_visible_annotations = NULL;
1.1996 + int runtime_visible_annotations_length = 0;
1.1997 + u1* runtime_invisible_annotations = NULL;
1.1998 + int runtime_invisible_annotations_length = 0;
1.1999 + // Iterate over attributes
1.2000 + while (attributes_count--) {
1.2001 + cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length
1.2002 + u2 attribute_name_index = cfs->get_u2_fast();
1.2003 + u4 attribute_length = cfs->get_u4_fast();
1.2004 + check_property(
1.2005 + valid_cp_range(attribute_name_index, cp->length()) &&
1.2006 + cp->tag_at(attribute_name_index).is_utf8(),
1.2007 + "Attribute name has bad constant pool index %u in class file %s",
1.2008 + attribute_name_index, CHECK);
1.2009 + symbolOop tag = cp->symbol_at(attribute_name_index);
1.2010 + if (tag == vmSymbols::tag_source_file()) {
1.2011 + // Check for SourceFile tag
1.2012 + if (_need_verify) {
1.2013 + guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK);
1.2014 + }
1.2015 + if (parsed_sourcefile_attribute) {
1.2016 + classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK);
1.2017 + } else {
1.2018 + parsed_sourcefile_attribute = true;
1.2019 + }
1.2020 + parse_classfile_sourcefile_attribute(cp, k, CHECK);
1.2021 + } else if (tag == vmSymbols::tag_source_debug_extension()) {
1.2022 + // Check for SourceDebugExtension tag
1.2023 + parse_classfile_source_debug_extension_attribute(cp, k, (int)attribute_length, CHECK);
1.2024 + } else if (tag == vmSymbols::tag_inner_classes()) {
1.2025 + // Check for InnerClasses tag
1.2026 + if (parsed_innerclasses_attribute) {
1.2027 + classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK);
1.2028 + } else {
1.2029 + parsed_innerclasses_attribute = true;
1.2030 + }
1.2031 + u2 num_of_classes = parse_classfile_inner_classes_attribute(cp, k, CHECK);
1.2032 + if (_need_verify && _major_version >= JAVA_1_5_VERSION) {
1.2033 + guarantee_property(attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes,
1.2034 + "Wrong InnerClasses attribute length in class file %s", CHECK);
1.2035 + }
1.2036 + } else if (tag == vmSymbols::tag_synthetic()) {
1.2037 + // Check for Synthetic tag
1.2038 + // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec
1.2039 + if (attribute_length != 0) {
1.2040 + classfile_parse_error(
1.2041 + "Invalid Synthetic classfile attribute length %u in class file %s",
1.2042 + attribute_length, CHECK);
1.2043 + }
1.2044 + parse_classfile_synthetic_attribute(cp, k, CHECK);
1.2045 + } else if (tag == vmSymbols::tag_deprecated()) {
1.2046 + // Check for Deprecatd tag - 4276120
1.2047 + if (attribute_length != 0) {
1.2048 + classfile_parse_error(
1.2049 + "Invalid Deprecated classfile attribute length %u in class file %s",
1.2050 + attribute_length, CHECK);
1.2051 + }
1.2052 + } else if (_major_version >= JAVA_1_5_VERSION) {
1.2053 + if (tag == vmSymbols::tag_signature()) {
1.2054 + if (attribute_length != 2) {
1.2055 + classfile_parse_error(
1.2056 + "Wrong Signature attribute length %u in class file %s",
1.2057 + attribute_length, CHECK);
1.2058 + }
1.2059 + parse_classfile_signature_attribute(cp, k, CHECK);
1.2060 + } else if (tag == vmSymbols::tag_runtime_visible_annotations()) {
1.2061 + runtime_visible_annotations_length = attribute_length;
1.2062 + runtime_visible_annotations = cfs->get_u1_buffer();
1.2063 + assert(runtime_visible_annotations != NULL, "null visible annotations");
1.2064 + cfs->skip_u1(runtime_visible_annotations_length, CHECK);
1.2065 + } else if (PreserveAllAnnotations && tag == vmSymbols::tag_runtime_invisible_annotations()) {
1.2066 + runtime_invisible_annotations_length = attribute_length;
1.2067 + runtime_invisible_annotations = cfs->get_u1_buffer();
1.2068 + assert(runtime_invisible_annotations != NULL, "null invisible annotations");
1.2069 + cfs->skip_u1(runtime_invisible_annotations_length, CHECK);
1.2070 + } else if (tag == vmSymbols::tag_enclosing_method()) {
1.2071 + if (parsed_enclosingmethod_attribute) {
1.2072 + classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK);
1.2073 + } else {
1.2074 + parsed_enclosingmethod_attribute = true;
1.2075 + }
1.2076 + cfs->guarantee_more(4, CHECK); // class_index, method_index
1.2077 + u2 class_index = cfs->get_u2_fast();
1.2078 + u2 method_index = cfs->get_u2_fast();
1.2079 + if (class_index == 0) {
1.2080 + classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK);
1.2081 + }
1.2082 + // Validate the constant pool indices and types
1.2083 + if (!cp->is_within_bounds(class_index) ||
1.2084 + !cp->tag_at(class_index).is_klass_reference()) {
1.2085 + classfile_parse_error("Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK);
1.2086 + }
1.2087 + if (method_index != 0 &&
1.2088 + (!cp->is_within_bounds(method_index) ||
1.2089 + !cp->tag_at(method_index).is_name_and_type())) {
1.2090 + classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK);
1.2091 + }
1.2092 + k->set_enclosing_method_indices(class_index, method_index);
1.2093 + } else {
1.2094 + // Unknown attribute
1.2095 + cfs->skip_u1(attribute_length, CHECK);
1.2096 + }
1.2097 + } else {
1.2098 + // Unknown attribute
1.2099 + cfs->skip_u1(attribute_length, CHECK);
1.2100 + }
1.2101 + }
1.2102 + typeArrayHandle annotations = assemble_annotations(runtime_visible_annotations,
1.2103 + runtime_visible_annotations_length,
1.2104 + runtime_invisible_annotations,
1.2105 + runtime_invisible_annotations_length,
1.2106 + CHECK);
1.2107 + k->set_class_annotations(annotations());
1.2108 +}
1.2109 +
1.2110 +
1.2111 +typeArrayHandle ClassFileParser::assemble_annotations(u1* runtime_visible_annotations,
1.2112 + int runtime_visible_annotations_length,
1.2113 + u1* runtime_invisible_annotations,
1.2114 + int runtime_invisible_annotations_length, TRAPS) {
1.2115 + typeArrayHandle annotations;
1.2116 + if (runtime_visible_annotations != NULL ||
1.2117 + runtime_invisible_annotations != NULL) {
1.2118 + typeArrayOop anno = oopFactory::new_permanent_byteArray(runtime_visible_annotations_length +
1.2119 + runtime_invisible_annotations_length, CHECK_(annotations));
1.2120 + annotations = typeArrayHandle(THREAD, anno);
1.2121 + if (runtime_visible_annotations != NULL) {
1.2122 + memcpy(annotations->byte_at_addr(0), runtime_visible_annotations, runtime_visible_annotations_length);
1.2123 + }
1.2124 + if (runtime_invisible_annotations != NULL) {
1.2125 + memcpy(annotations->byte_at_addr(runtime_visible_annotations_length), runtime_invisible_annotations, runtime_invisible_annotations_length);
1.2126 + }
1.2127 + }
1.2128 + return annotations;
1.2129 +}
1.2130 +
1.2131 +
1.2132 +static void initialize_static_field(fieldDescriptor* fd, TRAPS) {
1.2133 + KlassHandle h_k (THREAD, fd->field_holder());
1.2134 + assert(h_k.not_null() && fd->is_static(), "just checking");
1.2135 + if (fd->has_initial_value()) {
1.2136 + BasicType t = fd->field_type();
1.2137 + switch (t) {
1.2138 + case T_BYTE:
1.2139 + h_k()->byte_field_put(fd->offset(), fd->int_initial_value());
1.2140 + break;
1.2141 + case T_BOOLEAN:
1.2142 + h_k()->bool_field_put(fd->offset(), fd->int_initial_value());
1.2143 + break;
1.2144 + case T_CHAR:
1.2145 + h_k()->char_field_put(fd->offset(), fd->int_initial_value());
1.2146 + break;
1.2147 + case T_SHORT:
1.2148 + h_k()->short_field_put(fd->offset(), fd->int_initial_value());
1.2149 + break;
1.2150 + case T_INT:
1.2151 + h_k()->int_field_put(fd->offset(), fd->int_initial_value());
1.2152 + break;
1.2153 + case T_FLOAT:
1.2154 + h_k()->float_field_put(fd->offset(), fd->float_initial_value());
1.2155 + break;
1.2156 + case T_DOUBLE:
1.2157 + h_k()->double_field_put(fd->offset(), fd->double_initial_value());
1.2158 + break;
1.2159 + case T_LONG:
1.2160 + h_k()->long_field_put(fd->offset(), fd->long_initial_value());
1.2161 + break;
1.2162 + case T_OBJECT:
1.2163 + {
1.2164 + #ifdef ASSERT
1.2165 + symbolOop sym = oopFactory::new_symbol("Ljava/lang/String;", CHECK);
1.2166 + assert(fd->signature() == sym, "just checking");
1.2167 + #endif
1.2168 + oop string = fd->string_initial_value(CHECK);
1.2169 + h_k()->obj_field_put(fd->offset(), string);
1.2170 + }
1.2171 + break;
1.2172 + default:
1.2173 + THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
1.2174 + "Illegal ConstantValue attribute in class file");
1.2175 + }
1.2176 + }
1.2177 +}
1.2178 +
1.2179 +
1.2180 +void ClassFileParser::java_lang_ref_Reference_fix_pre(typeArrayHandle* fields_ptr,
1.2181 + constantPoolHandle cp, FieldAllocationCount *fac_ptr, TRAPS) {
1.2182 + // This code is for compatibility with earlier jdk's that do not
1.2183 + // have the "discovered" field in java.lang.ref.Reference. For 1.5
1.2184 + // the check for the "discovered" field should issue a warning if
1.2185 + // the field is not found. For 1.6 this code should be issue a
1.2186 + // fatal error if the "discovered" field is not found.
1.2187 + //
1.2188 + // Increment fac.nonstatic_oop_count so that the start of the
1.2189 + // next type of non-static oops leaves room for the fake oop.
1.2190 + // Do not increment next_nonstatic_oop_offset so that the
1.2191 + // fake oop is place after the java.lang.ref.Reference oop
1.2192 + // fields.
1.2193 + //
1.2194 + // Check the fields in java.lang.ref.Reference for the "discovered"
1.2195 + // field. If it is not present, artifically create a field for it.
1.2196 + // This allows this VM to run on early JDK where the field is not
1.2197 + // present.
1.2198 +
1.2199 + //
1.2200 + // Increment fac.nonstatic_oop_count so that the start of the
1.2201 + // next type of non-static oops leaves room for the fake oop.
1.2202 + // Do not increment next_nonstatic_oop_offset so that the
1.2203 + // fake oop is place after the java.lang.ref.Reference oop
1.2204 + // fields.
1.2205 + //
1.2206 + // Check the fields in java.lang.ref.Reference for the "discovered"
1.2207 + // field. If it is not present, artifically create a field for it.
1.2208 + // This allows this VM to run on early JDK where the field is not
1.2209 + // present.
1.2210 + int reference_sig_index = 0;
1.2211 + int reference_name_index = 0;
1.2212 + int reference_index = 0;
1.2213 + int extra = java_lang_ref_Reference::number_of_fake_oop_fields;
1.2214 + const int n = (*fields_ptr)()->length();
1.2215 + for (int i = 0; i < n; i += instanceKlass::next_offset ) {
1.2216 + int name_index =
1.2217 + (*fields_ptr)()->ushort_at(i + instanceKlass::name_index_offset);
1.2218 + int sig_index =
1.2219 + (*fields_ptr)()->ushort_at(i + instanceKlass::signature_index_offset);
1.2220 + symbolOop f_name = cp->symbol_at(name_index);
1.2221 + symbolOop f_sig = cp->symbol_at(sig_index);
1.2222 + if (f_sig == vmSymbols::reference_signature() && reference_index == 0) {
1.2223 + // Save the index for reference signature for later use.
1.2224 + // The fake discovered field does not entries in the
1.2225 + // constant pool so the index for its signature cannot
1.2226 + // be extracted from the constant pool. It will need
1.2227 + // later, however. It's signature is vmSymbols::reference_signature()
1.2228 + // so same an index for that signature.
1.2229 + reference_sig_index = sig_index;
1.2230 + reference_name_index = name_index;
1.2231 + reference_index = i;
1.2232 + }
1.2233 + if (f_name == vmSymbols::reference_discovered_name() &&
1.2234 + f_sig == vmSymbols::reference_signature()) {
1.2235 + // The values below are fake but will force extra
1.2236 + // non-static oop fields and a corresponding non-static
1.2237 + // oop map block to be allocated.
1.2238 + extra = 0;
1.2239 + break;
1.2240 + }
1.2241 + }
1.2242 + if (extra != 0) {
1.2243 + fac_ptr->nonstatic_oop_count += extra;
1.2244 + // Add the additional entry to "fields" so that the klass
1.2245 + // contains the "discoverd" field and the field will be initialized
1.2246 + // in instances of the object.
1.2247 + int fields_with_fix_length = (*fields_ptr)()->length() +
1.2248 + instanceKlass::next_offset;
1.2249 + typeArrayOop ff = oopFactory::new_permanent_shortArray(
1.2250 + fields_with_fix_length, CHECK);
1.2251 + typeArrayHandle fields_with_fix(THREAD, ff);
1.2252 +
1.2253 + // Take everything from the original but the length.
1.2254 + for (int idx = 0; idx < (*fields_ptr)->length(); idx++) {
1.2255 + fields_with_fix->ushort_at_put(idx, (*fields_ptr)->ushort_at(idx));
1.2256 + }
1.2257 +
1.2258 + // Add the fake field at the end.
1.2259 + int i = (*fields_ptr)->length();
1.2260 + // There is no name index for the fake "discovered" field nor
1.2261 + // signature but a signature is needed so that the field will
1.2262 + // be properly initialized. Use one found for
1.2263 + // one of the other reference fields. Be sure the index for the
1.2264 + // name is 0. In fieldDescriptor::initialize() the index of the
1.2265 + // name is checked. That check is by passed for the last nonstatic
1.2266 + // oop field in a java.lang.ref.Reference which is assumed to be
1.2267 + // this artificial "discovered" field. An assertion checks that
1.2268 + // the name index is 0.
1.2269 + assert(reference_index != 0, "Missing signature for reference");
1.2270 +
1.2271 + int j;
1.2272 + for (j = 0; j < instanceKlass::next_offset; j++) {
1.2273 + fields_with_fix->ushort_at_put(i + j,
1.2274 + (*fields_ptr)->ushort_at(reference_index +j));
1.2275 + }
1.2276 + // Clear the public access flag and set the private access flag.
1.2277 + short flags;
1.2278 + flags =
1.2279 + fields_with_fix->ushort_at(i + instanceKlass::access_flags_offset);
1.2280 + assert(!(flags & JVM_RECOGNIZED_FIELD_MODIFIERS), "Unexpected access flags set");
1.2281 + flags = flags & (~JVM_ACC_PUBLIC);
1.2282 + flags = flags | JVM_ACC_PRIVATE;
1.2283 + AccessFlags access_flags;
1.2284 + access_flags.set_flags(flags);
1.2285 + assert(!access_flags.is_public(), "Failed to clear public flag");
1.2286 + assert(access_flags.is_private(), "Failed to set private flag");
1.2287 + fields_with_fix->ushort_at_put(i + instanceKlass::access_flags_offset,
1.2288 + flags);
1.2289 +
1.2290 + assert(fields_with_fix->ushort_at(i + instanceKlass::name_index_offset)
1.2291 + == reference_name_index, "The fake reference name is incorrect");
1.2292 + assert(fields_with_fix->ushort_at(i + instanceKlass::signature_index_offset)
1.2293 + == reference_sig_index, "The fake reference signature is incorrect");
1.2294 + // The type of the field is stored in the low_offset entry during
1.2295 + // parsing.
1.2296 + assert(fields_with_fix->ushort_at(i + instanceKlass::low_offset) ==
1.2297 + NONSTATIC_OOP, "The fake reference type is incorrect");
1.2298 +
1.2299 + // "fields" is allocated in the permanent generation. Disgard
1.2300 + // it and let it be collected.
1.2301 + (*fields_ptr) = fields_with_fix;
1.2302 + }
1.2303 + return;
1.2304 +}
1.2305 +
1.2306 +
1.2307 +void ClassFileParser::java_lang_Class_fix_pre(objArrayHandle* methods_ptr,
1.2308 + FieldAllocationCount *fac_ptr, TRAPS) {
1.2309 + // Add fake fields for java.lang.Class instances
1.2310 + //
1.2311 + // This is not particularly nice. We should consider adding a
1.2312 + // private transient object field at the Java level to
1.2313 + // java.lang.Class. Alternatively we could add a subclass of
1.2314 + // instanceKlass which provides an accessor and size computer for
1.2315 + // this field, but that appears to be more code than this hack.
1.2316 + //
1.2317 + // NOTE that we wedge these in at the beginning rather than the
1.2318 + // end of the object because the Class layout changed between JDK
1.2319 + // 1.3 and JDK 1.4 with the new reflection implementation; some
1.2320 + // nonstatic oop fields were added at the Java level. The offsets
1.2321 + // of these fake fields can't change between these two JDK
1.2322 + // versions because when the offsets are computed at bootstrap
1.2323 + // time we don't know yet which version of the JDK we're running in.
1.2324 +
1.2325 + // The values below are fake but will force two non-static oop fields and
1.2326 + // a corresponding non-static oop map block to be allocated.
1.2327 + const int extra = java_lang_Class::number_of_fake_oop_fields;
1.2328 + fac_ptr->nonstatic_oop_count += extra;
1.2329 +}
1.2330 +
1.2331 +
1.2332 +void ClassFileParser::java_lang_Class_fix_post(int* next_nonstatic_oop_offset_ptr) {
1.2333 + // Cause the extra fake fields in java.lang.Class to show up before
1.2334 + // the Java fields for layout compatibility between 1.3 and 1.4
1.2335 + // Incrementing next_nonstatic_oop_offset here advances the
1.2336 + // location where the real java fields are placed.
1.2337 + const int extra = java_lang_Class::number_of_fake_oop_fields;
1.2338 + (*next_nonstatic_oop_offset_ptr) += (extra * wordSize);
1.2339 +}
1.2340 +
1.2341 +
1.2342 +instanceKlassHandle ClassFileParser::parseClassFile(symbolHandle name,
1.2343 + Handle class_loader,
1.2344 + Handle protection_domain,
1.2345 + symbolHandle& parsed_name,
1.2346 + TRAPS) {
1.2347 + // So that JVMTI can cache class file in the state before retransformable agents
1.2348 + // have modified it
1.2349 + unsigned char *cached_class_file_bytes = NULL;
1.2350 + jint cached_class_file_length;
1.2351 +
1.2352 + ClassFileStream* cfs = stream();
1.2353 + // Timing
1.2354 + PerfTraceTime vmtimer(ClassLoader::perf_accumulated_time());
1.2355 +
1.2356 + _has_finalizer = _has_empty_finalizer = _has_vanilla_constructor = false;
1.2357 +
1.2358 + if (JvmtiExport::should_post_class_file_load_hook()) {
1.2359 + unsigned char* ptr = cfs->buffer();
1.2360 + unsigned char* end_ptr = cfs->buffer() + cfs->length();
1.2361 +
1.2362 + JvmtiExport::post_class_file_load_hook(name, class_loader, protection_domain,
1.2363 + &ptr, &end_ptr,
1.2364 + &cached_class_file_bytes,
1.2365 + &cached_class_file_length);
1.2366 +
1.2367 + if (ptr != cfs->buffer()) {
1.2368 + // JVMTI agent has modified class file data.
1.2369 + // Set new class file stream using JVMTI agent modified
1.2370 + // class file data.
1.2371 + cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source());
1.2372 + set_stream(cfs);
1.2373 + }
1.2374 + }
1.2375 +
1.2376 +
1.2377 + instanceKlassHandle nullHandle;
1.2378 +
1.2379 + // Figure out whether we can skip format checking (matching classic VM behavior)
1.2380 + _need_verify = Verifier::should_verify_for(class_loader());
1.2381 +
1.2382 + // Set the verify flag in stream
1.2383 + cfs->set_verify(_need_verify);
1.2384 +
1.2385 + // Save the class file name for easier error message printing.
1.2386 + _class_name = name.not_null()? name : vmSymbolHandles::unknown_class_name();
1.2387 +
1.2388 + cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor
1.2389 + // Magic value
1.2390 + u4 magic = cfs->get_u4_fast();
1.2391 + guarantee_property(magic == JAVA_CLASSFILE_MAGIC,
1.2392 + "Incompatible magic value %u in class file %s",
1.2393 + magic, CHECK_(nullHandle));
1.2394 +
1.2395 + // Version numbers
1.2396 + u2 minor_version = cfs->get_u2_fast();
1.2397 + u2 major_version = cfs->get_u2_fast();
1.2398 +
1.2399 + // Check version numbers - we check this even with verifier off
1.2400 + if (!is_supported_version(major_version, minor_version)) {
1.2401 + if (name.is_null()) {
1.2402 + Exceptions::fthrow(
1.2403 + THREAD_AND_LOCATION,
1.2404 + vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
1.2405 + "Unsupported major.minor version %u.%u",
1.2406 + major_version,
1.2407 + minor_version);
1.2408 + } else {
1.2409 + ResourceMark rm(THREAD);
1.2410 + Exceptions::fthrow(
1.2411 + THREAD_AND_LOCATION,
1.2412 + vmSymbolHandles::java_lang_UnsupportedClassVersionError(),
1.2413 + "%s : Unsupported major.minor version %u.%u",
1.2414 + name->as_C_string(),
1.2415 + major_version,
1.2416 + minor_version);
1.2417 + }
1.2418 + return nullHandle;
1.2419 + }
1.2420 +
1.2421 + _major_version = major_version;
1.2422 + _minor_version = minor_version;
1.2423 +
1.2424 +
1.2425 + // Check if verification needs to be relaxed for this class file
1.2426 + // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376)
1.2427 + _relax_verify = Verifier::relax_verify_for(class_loader());
1.2428 +
1.2429 + // Constant pool
1.2430 + constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle));
1.2431 + int cp_size = cp->length();
1.2432 +
1.2433 + cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len
1.2434 +
1.2435 + // Access flags
1.2436 + AccessFlags access_flags;
1.2437 + jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS;
1.2438 +
1.2439 + if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) {
1.2440 + // Set abstract bit for old class files for backward compatibility
1.2441 + flags |= JVM_ACC_ABSTRACT;
1.2442 + }
1.2443 + verify_legal_class_modifiers(flags, CHECK_(nullHandle));
1.2444 + access_flags.set_flags(flags);
1.2445 +
1.2446 + // This class and superclass
1.2447 + instanceKlassHandle super_klass;
1.2448 + u2 this_class_index = cfs->get_u2_fast();
1.2449 + check_property(
1.2450 + valid_cp_range(this_class_index, cp_size) &&
1.2451 + cp->tag_at(this_class_index).is_unresolved_klass(),
1.2452 + "Invalid this class index %u in constant pool in class file %s",
1.2453 + this_class_index, CHECK_(nullHandle));
1.2454 +
1.2455 + symbolHandle class_name (THREAD, cp->unresolved_klass_at(this_class_index));
1.2456 + assert(class_name.not_null(), "class_name can't be null");
1.2457 +
1.2458 + // It's important to set parsed_name *before* resolving the super class.
1.2459 + // (it's used for cleanup by the caller if parsing fails)
1.2460 + parsed_name = class_name;
1.2461 +
1.2462 + // Update _class_name which could be null previously to be class_name
1.2463 + _class_name = class_name;
1.2464 +
1.2465 + // Don't need to check whether this class name is legal or not.
1.2466 + // It has been checked when constant pool is parsed.
1.2467 + // However, make sure it is not an array type.
1.2468 + if (_need_verify) {
1.2469 + guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY,
1.2470 + "Bad class name in class file %s",
1.2471 + CHECK_(nullHandle));
1.2472 + }
1.2473 +
1.2474 + klassOop preserve_this_klass; // for storing result across HandleMark
1.2475 +
1.2476 + // release all handles when parsing is done
1.2477 + { HandleMark hm(THREAD);
1.2478 +
1.2479 + // Checks if name in class file matches requested name
1.2480 + if (name.not_null() && class_name() != name()) {
1.2481 + ResourceMark rm(THREAD);
1.2482 + Exceptions::fthrow(
1.2483 + THREAD_AND_LOCATION,
1.2484 + vmSymbolHandles::java_lang_NoClassDefFoundError(),
1.2485 + "%s (wrong name: %s)",
1.2486 + name->as_C_string(),
1.2487 + class_name->as_C_string()
1.2488 + );
1.2489 + return nullHandle;
1.2490 + }
1.2491 +
1.2492 + if (TraceClassLoadingPreorder) {
1.2493 + tty->print("[Loading %s", name()->as_klass_external_name());
1.2494 + if (cfs->source() != NULL) tty->print(" from %s", cfs->source());
1.2495 + tty->print_cr("]");
1.2496 + }
1.2497 +
1.2498 + u2 super_class_index = cfs->get_u2_fast();
1.2499 + if (super_class_index == 0) {
1.2500 + check_property(class_name() == vmSymbols::java_lang_Object(),
1.2501 + "Invalid superclass index %u in class file %s",
1.2502 + super_class_index,
1.2503 + CHECK_(nullHandle));
1.2504 + } else {
1.2505 + check_property(valid_cp_range(super_class_index, cp_size) &&
1.2506 + cp->tag_at(super_class_index).is_unresolved_klass(),
1.2507 + "Invalid superclass index %u in class file %s",
1.2508 + super_class_index,
1.2509 + CHECK_(nullHandle));
1.2510 + // The class name should be legal because it is checked when parsing constant pool.
1.2511 + // However, make sure it is not an array type.
1.2512 + if (_need_verify) {
1.2513 + guarantee_property(cp->unresolved_klass_at(super_class_index)->byte_at(0) != JVM_SIGNATURE_ARRAY,
1.2514 + "Bad superclass name in class file %s", CHECK_(nullHandle));
1.2515 + }
1.2516 + }
1.2517 +
1.2518 + // Interfaces
1.2519 + u2 itfs_len = cfs->get_u2_fast();
1.2520 + objArrayHandle local_interfaces;
1.2521 + if (itfs_len == 0) {
1.2522 + local_interfaces = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
1.2523 + } else {
1.2524 + local_interfaces = parse_interfaces(cp, itfs_len, class_loader, protection_domain, &vmtimer, _class_name, CHECK_(nullHandle));
1.2525 + }
1.2526 +
1.2527 + // Fields (offsets are filled in later)
1.2528 + struct FieldAllocationCount fac = {0,0,0,0,0,0,0,0,0,0};
1.2529 + objArrayHandle fields_annotations;
1.2530 + typeArrayHandle fields = parse_fields(cp, access_flags.is_interface(), &fac, &fields_annotations, CHECK_(nullHandle));
1.2531 + // Methods
1.2532 + bool has_final_method = false;
1.2533 + AccessFlags promoted_flags;
1.2534 + promoted_flags.set_flags(0);
1.2535 + // These need to be oop pointers because they are allocated lazily
1.2536 + // inside parse_methods inside a nested HandleMark
1.2537 + objArrayOop methods_annotations_oop = NULL;
1.2538 + objArrayOop methods_parameter_annotations_oop = NULL;
1.2539 + objArrayOop methods_default_annotations_oop = NULL;
1.2540 + objArrayHandle methods = parse_methods(cp, access_flags.is_interface(),
1.2541 + &promoted_flags,
1.2542 + &has_final_method,
1.2543 + &methods_annotations_oop,
1.2544 + &methods_parameter_annotations_oop,
1.2545 + &methods_default_annotations_oop,
1.2546 + CHECK_(nullHandle));
1.2547 +
1.2548 + objArrayHandle methods_annotations(THREAD, methods_annotations_oop);
1.2549 + objArrayHandle methods_parameter_annotations(THREAD, methods_parameter_annotations_oop);
1.2550 + objArrayHandle methods_default_annotations(THREAD, methods_default_annotations_oop);
1.2551 +
1.2552 + // We check super class after class file is parsed and format is checked
1.2553 + if (super_class_index > 0) {
1.2554 + symbolHandle sk (THREAD, cp->klass_name_at(super_class_index));
1.2555 + if (access_flags.is_interface()) {
1.2556 + // Before attempting to resolve the superclass, check for class format
1.2557 + // errors not checked yet.
1.2558 + guarantee_property(sk() == vmSymbols::java_lang_Object(),
1.2559 + "Interfaces must have java.lang.Object as superclass in class file %s",
1.2560 + CHECK_(nullHandle));
1.2561 + }
1.2562 + klassOop k = SystemDictionary::resolve_super_or_fail(class_name,
1.2563 + sk,
1.2564 + class_loader,
1.2565 + protection_domain,
1.2566 + true,
1.2567 + CHECK_(nullHandle));
1.2568 + KlassHandle kh (THREAD, k);
1.2569 + super_klass = instanceKlassHandle(THREAD, kh());
1.2570 + if (super_klass->is_interface()) {
1.2571 + ResourceMark rm(THREAD);
1.2572 + Exceptions::fthrow(
1.2573 + THREAD_AND_LOCATION,
1.2574 + vmSymbolHandles::java_lang_IncompatibleClassChangeError(),
1.2575 + "class %s has interface %s as super class",
1.2576 + class_name->as_klass_external_name(),
1.2577 + super_klass->external_name()
1.2578 + );
1.2579 + return nullHandle;
1.2580 + }
1.2581 + // Make sure super class is not final
1.2582 + if (super_klass->is_final()) {
1.2583 + THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle);
1.2584 + }
1.2585 + }
1.2586 +
1.2587 + // Compute the transitive list of all unique interfaces implemented by this class
1.2588 + objArrayHandle transitive_interfaces = compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle));
1.2589 +
1.2590 + // sort methods
1.2591 + typeArrayHandle method_ordering = sort_methods(methods,
1.2592 + methods_annotations,
1.2593 + methods_parameter_annotations,
1.2594 + methods_default_annotations,
1.2595 + CHECK_(nullHandle));
1.2596 +
1.2597 + // promote flags from parse_methods() to the klass' flags
1.2598 + access_flags.add_promoted_flags(promoted_flags.as_int());
1.2599 +
1.2600 + // Size of Java vtable (in words)
1.2601 + int vtable_size = 0;
1.2602 + int itable_size = 0;
1.2603 + int num_miranda_methods = 0;
1.2604 +
1.2605 + klassVtable::compute_vtable_size_and_num_mirandas(vtable_size,
1.2606 + num_miranda_methods,
1.2607 + super_klass(),
1.2608 + methods(),
1.2609 + access_flags,
1.2610 + class_loader(),
1.2611 + class_name(),
1.2612 + local_interfaces());
1.2613 +
1.2614 + // Size of Java itable (in words)
1.2615 + itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(transitive_interfaces);
1.2616 +
1.2617 + // Field size and offset computation
1.2618 + int nonstatic_field_size = super_klass() == NULL ? 0 : super_klass->nonstatic_field_size();
1.2619 +#ifndef PRODUCT
1.2620 + int orig_nonstatic_field_size = 0;
1.2621 +#endif
1.2622 + int static_field_size = 0;
1.2623 + int next_static_oop_offset;
1.2624 + int next_static_double_offset;
1.2625 + int next_static_word_offset;
1.2626 + int next_static_short_offset;
1.2627 + int next_static_byte_offset;
1.2628 + int next_static_type_offset;
1.2629 + int next_nonstatic_oop_offset;
1.2630 + int next_nonstatic_double_offset;
1.2631 + int next_nonstatic_word_offset;
1.2632 + int next_nonstatic_short_offset;
1.2633 + int next_nonstatic_byte_offset;
1.2634 + int next_nonstatic_type_offset;
1.2635 + int first_nonstatic_oop_offset;
1.2636 + int first_nonstatic_field_offset;
1.2637 + int next_nonstatic_field_offset;
1.2638 +
1.2639 + // Calculate the starting byte offsets
1.2640 + next_static_oop_offset = (instanceKlass::header_size() +
1.2641 + align_object_offset(vtable_size) +
1.2642 + align_object_offset(itable_size)) * wordSize;
1.2643 + next_static_double_offset = next_static_oop_offset +
1.2644 + (fac.static_oop_count * oopSize);
1.2645 + if ( fac.static_double_count &&
1.2646 + (Universe::field_type_should_be_aligned(T_DOUBLE) ||
1.2647 + Universe::field_type_should_be_aligned(T_LONG)) ) {
1.2648 + next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong);
1.2649 + }
1.2650 +
1.2651 + next_static_word_offset = next_static_double_offset +
1.2652 + (fac.static_double_count * BytesPerLong);
1.2653 + next_static_short_offset = next_static_word_offset +
1.2654 + (fac.static_word_count * BytesPerInt);
1.2655 + next_static_byte_offset = next_static_short_offset +
1.2656 + (fac.static_short_count * BytesPerShort);
1.2657 + next_static_type_offset = align_size_up((next_static_byte_offset +
1.2658 + fac.static_byte_count ), wordSize );
1.2659 + static_field_size = (next_static_type_offset -
1.2660 + next_static_oop_offset) / wordSize;
1.2661 + first_nonstatic_field_offset = (instanceOopDesc::header_size() +
1.2662 + nonstatic_field_size) * wordSize;
1.2663 + next_nonstatic_field_offset = first_nonstatic_field_offset;
1.2664 +
1.2665 + // Add fake fields for java.lang.Class instances (also see below)
1.2666 + if (class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
1.2667 + java_lang_Class_fix_pre(&methods, &fac, CHECK_(nullHandle));
1.2668 + }
1.2669 +
1.2670 + // Add a fake "discovered" field if it is not present
1.2671 + // for compatibility with earlier jdk's.
1.2672 + if (class_name() == vmSymbols::java_lang_ref_Reference()
1.2673 + && class_loader.is_null()) {
1.2674 + java_lang_ref_Reference_fix_pre(&fields, cp, &fac, CHECK_(nullHandle));
1.2675 + }
1.2676 + // end of "discovered" field compactibility fix
1.2677 +
1.2678 + int nonstatic_double_count = fac.nonstatic_double_count;
1.2679 + int nonstatic_word_count = fac.nonstatic_word_count;
1.2680 + int nonstatic_short_count = fac.nonstatic_short_count;
1.2681 + int nonstatic_byte_count = fac.nonstatic_byte_count;
1.2682 + int nonstatic_oop_count = fac.nonstatic_oop_count;
1.2683 +
1.2684 + // Prepare list of oops for oop maps generation.
1.2685 + u2* nonstatic_oop_offsets;
1.2686 + u2* nonstatic_oop_length;
1.2687 + int nonstatic_oop_map_count = 0;
1.2688 +
1.2689 + nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD(
1.2690 + THREAD, u2, nonstatic_oop_count+1);
1.2691 + nonstatic_oop_length = NEW_RESOURCE_ARRAY_IN_THREAD(
1.2692 + THREAD, u2, nonstatic_oop_count+1);
1.2693 +
1.2694 + // Add fake fields for java.lang.Class instances (also see above).
1.2695 + // FieldsAllocationStyle and CompactFields values will be reset to default.
1.2696 + if(class_name() == vmSymbols::java_lang_Class() && class_loader.is_null()) {
1.2697 + java_lang_Class_fix_post(&next_nonstatic_field_offset);
1.2698 + nonstatic_oop_offsets[0] = (u2)first_nonstatic_field_offset;
1.2699 + int fake_oop_count = (( next_nonstatic_field_offset -
1.2700 + first_nonstatic_field_offset ) / oopSize);
1.2701 + nonstatic_oop_length [0] = (u2)fake_oop_count;
1.2702 + nonstatic_oop_map_count = 1;
1.2703 + nonstatic_oop_count -= fake_oop_count;
1.2704 + first_nonstatic_oop_offset = first_nonstatic_field_offset;
1.2705 + } else {
1.2706 + first_nonstatic_oop_offset = 0; // will be set for first oop field
1.2707 + }
1.2708 +
1.2709 +#ifndef PRODUCT
1.2710 + if( PrintCompactFieldsSavings ) {
1.2711 + next_nonstatic_double_offset = next_nonstatic_field_offset +
1.2712 + (nonstatic_oop_count * oopSize);
1.2713 + if ( nonstatic_double_count > 0 ) {
1.2714 + next_nonstatic_double_offset = align_size_up(next_nonstatic_double_offset, BytesPerLong);
1.2715 + }
1.2716 + next_nonstatic_word_offset = next_nonstatic_double_offset +
1.2717 + (nonstatic_double_count * BytesPerLong);
1.2718 + next_nonstatic_short_offset = next_nonstatic_word_offset +
1.2719 + (nonstatic_word_count * BytesPerInt);
1.2720 + next_nonstatic_byte_offset = next_nonstatic_short_offset +
1.2721 + (nonstatic_short_count * BytesPerShort);
1.2722 + next_nonstatic_type_offset = align_size_up((next_nonstatic_byte_offset +
1.2723 + nonstatic_byte_count ), wordSize );
1.2724 + orig_nonstatic_field_size = nonstatic_field_size +
1.2725 + ((next_nonstatic_type_offset - first_nonstatic_field_offset)/wordSize);
1.2726 + }
1.2727 +#endif
1.2728 + bool compact_fields = CompactFields;
1.2729 + int allocation_style = FieldsAllocationStyle;
1.2730 + if( allocation_style < 0 || allocation_style > 1 ) { // Out of range?
1.2731 + assert(false, "0 <= FieldsAllocationStyle <= 1");
1.2732 + allocation_style = 1; // Optimistic
1.2733 + }
1.2734 +
1.2735 + // The next classes have predefined hard-coded fields offsets
1.2736 + // (see in JavaClasses::compute_hard_coded_offsets()).
1.2737 + // Use default fields allocation order for them.
1.2738 + if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() &&
1.2739 + (class_name() == vmSymbols::java_lang_AssertionStatusDirectives() ||
1.2740 + class_name() == vmSymbols::java_lang_Class() ||
1.2741 + class_name() == vmSymbols::java_lang_ClassLoader() ||
1.2742 + class_name() == vmSymbols::java_lang_ref_Reference() ||
1.2743 + class_name() == vmSymbols::java_lang_ref_SoftReference() ||
1.2744 + class_name() == vmSymbols::java_lang_StackTraceElement() ||
1.2745 + class_name() == vmSymbols::java_lang_String() ||
1.2746 + class_name() == vmSymbols::java_lang_Throwable()) ) {
1.2747 + allocation_style = 0; // Allocate oops first
1.2748 + compact_fields = false; // Don't compact fields
1.2749 + }
1.2750 +
1.2751 + if( allocation_style == 0 ) {
1.2752 + // Fields order: oops, longs/doubles, ints, shorts/chars, bytes
1.2753 + next_nonstatic_oop_offset = next_nonstatic_field_offset;
1.2754 + next_nonstatic_double_offset = next_nonstatic_oop_offset +
1.2755 + (nonstatic_oop_count * oopSize);
1.2756 + } else if( allocation_style == 1 ) {
1.2757 + // Fields order: longs/doubles, ints, shorts/chars, bytes, oops
1.2758 + next_nonstatic_double_offset = next_nonstatic_field_offset;
1.2759 + } else {
1.2760 + ShouldNotReachHere();
1.2761 + }
1.2762 +
1.2763 + int nonstatic_oop_space_count = 0;
1.2764 + int nonstatic_word_space_count = 0;
1.2765 + int nonstatic_short_space_count = 0;
1.2766 + int nonstatic_byte_space_count = 0;
1.2767 + int nonstatic_oop_space_offset;
1.2768 + int nonstatic_word_space_offset;
1.2769 + int nonstatic_short_space_offset;
1.2770 + int nonstatic_byte_space_offset;
1.2771 +
1.2772 + if( nonstatic_double_count > 0 ) {
1.2773 + int offset = next_nonstatic_double_offset;
1.2774 + next_nonstatic_double_offset = align_size_up(offset, BytesPerLong);
1.2775 + if( compact_fields && offset != next_nonstatic_double_offset ) {
1.2776 + // Allocate available fields into the gap before double field.
1.2777 + int length = next_nonstatic_double_offset - offset;
1.2778 + assert(length == BytesPerInt, "");
1.2779 + nonstatic_word_space_offset = offset;
1.2780 + if( nonstatic_word_count > 0 ) {
1.2781 + nonstatic_word_count -= 1;
1.2782 + nonstatic_word_space_count = 1; // Only one will fit
1.2783 + length -= BytesPerInt;
1.2784 + offset += BytesPerInt;
1.2785 + }
1.2786 + nonstatic_short_space_offset = offset;
1.2787 + while( length >= BytesPerShort && nonstatic_short_count > 0 ) {
1.2788 + nonstatic_short_count -= 1;
1.2789 + nonstatic_short_space_count += 1;
1.2790 + length -= BytesPerShort;
1.2791 + offset += BytesPerShort;
1.2792 + }
1.2793 + nonstatic_byte_space_offset = offset;
1.2794 + while( length > 0 && nonstatic_byte_count > 0 ) {
1.2795 + nonstatic_byte_count -= 1;
1.2796 + nonstatic_byte_space_count += 1;
1.2797 + length -= 1;
1.2798 + }
1.2799 + // Allocate oop field in the gap if there are no other fields for that.
1.2800 + nonstatic_oop_space_offset = offset;
1.2801 + if( length >= oopSize && nonstatic_oop_count > 0 &&
1.2802 + allocation_style != 0 ) { // when oop fields not first
1.2803 + nonstatic_oop_count -= 1;
1.2804 + nonstatic_oop_space_count = 1; // Only one will fit
1.2805 + length -= oopSize;
1.2806 + offset += oopSize;
1.2807 + }
1.2808 + }
1.2809 + }
1.2810 +
1.2811 + next_nonstatic_word_offset = next_nonstatic_double_offset +
1.2812 + (nonstatic_double_count * BytesPerLong);
1.2813 + next_nonstatic_short_offset = next_nonstatic_word_offset +
1.2814 + (nonstatic_word_count * BytesPerInt);
1.2815 + next_nonstatic_byte_offset = next_nonstatic_short_offset +
1.2816 + (nonstatic_short_count * BytesPerShort);
1.2817 +
1.2818 + int notaligned_offset;
1.2819 + if( allocation_style == 0 ) {
1.2820 + notaligned_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
1.2821 + } else { // allocation_style == 1
1.2822 + next_nonstatic_oop_offset = next_nonstatic_byte_offset + nonstatic_byte_count;
1.2823 + if( nonstatic_oop_count > 0 ) {
1.2824 + notaligned_offset = next_nonstatic_oop_offset;
1.2825 + next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, oopSize);
1.2826 + }
1.2827 + notaligned_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * oopSize);
1.2828 + }
1.2829 + next_nonstatic_type_offset = align_size_up(notaligned_offset, wordSize );
1.2830 + nonstatic_field_size = nonstatic_field_size + ((next_nonstatic_type_offset
1.2831 + - first_nonstatic_field_offset)/wordSize);
1.2832 +
1.2833 + // Iterate over fields again and compute correct offsets.
1.2834 + // The field allocation type was temporarily stored in the offset slot.
1.2835 + // oop fields are located before non-oop fields (static and non-static).
1.2836 + int len = fields->length();
1.2837 + for (int i = 0; i < len; i += instanceKlass::next_offset) {
1.2838 + int real_offset;
1.2839 + FieldAllocationType atype = (FieldAllocationType) fields->ushort_at(i+4);
1.2840 + switch (atype) {
1.2841 + case STATIC_OOP:
1.2842 + real_offset = next_static_oop_offset;
1.2843 + next_static_oop_offset += oopSize;
1.2844 + break;
1.2845 + case STATIC_BYTE:
1.2846 + real_offset = next_static_byte_offset;
1.2847 + next_static_byte_offset += 1;
1.2848 + break;
1.2849 + case STATIC_SHORT:
1.2850 + real_offset = next_static_short_offset;
1.2851 + next_static_short_offset += BytesPerShort;
1.2852 + break;
1.2853 + case STATIC_WORD:
1.2854 + real_offset = next_static_word_offset;
1.2855 + next_static_word_offset += BytesPerInt;
1.2856 + break;
1.2857 + case STATIC_ALIGNED_DOUBLE:
1.2858 + case STATIC_DOUBLE:
1.2859 + real_offset = next_static_double_offset;
1.2860 + next_static_double_offset += BytesPerLong;
1.2861 + break;
1.2862 + case NONSTATIC_OOP:
1.2863 + if( nonstatic_oop_space_count > 0 ) {
1.2864 + real_offset = nonstatic_oop_space_offset;
1.2865 + nonstatic_oop_space_offset += oopSize;
1.2866 + nonstatic_oop_space_count -= 1;
1.2867 + } else {
1.2868 + real_offset = next_nonstatic_oop_offset;
1.2869 + next_nonstatic_oop_offset += oopSize;
1.2870 + }
1.2871 + // Update oop maps
1.2872 + if( nonstatic_oop_map_count > 0 &&
1.2873 + nonstatic_oop_offsets[nonstatic_oop_map_count - 1] ==
1.2874 + (u2)(real_offset - nonstatic_oop_length[nonstatic_oop_map_count - 1] * oopSize) ) {
1.2875 + // Extend current oop map
1.2876 + nonstatic_oop_length[nonstatic_oop_map_count - 1] += 1;
1.2877 + } else {
1.2878 + // Create new oop map
1.2879 + nonstatic_oop_offsets[nonstatic_oop_map_count] = (u2)real_offset;
1.2880 + nonstatic_oop_length [nonstatic_oop_map_count] = 1;
1.2881 + nonstatic_oop_map_count += 1;
1.2882 + if( first_nonstatic_oop_offset == 0 ) { // Undefined
1.2883 + first_nonstatic_oop_offset = real_offset;
1.2884 + }
1.2885 + }
1.2886 + break;
1.2887 + case NONSTATIC_BYTE:
1.2888 + if( nonstatic_byte_space_count > 0 ) {
1.2889 + real_offset = nonstatic_byte_space_offset;
1.2890 + nonstatic_byte_space_offset += 1;
1.2891 + nonstatic_byte_space_count -= 1;
1.2892 + } else {
1.2893 + real_offset = next_nonstatic_byte_offset;
1.2894 + next_nonstatic_byte_offset += 1;
1.2895 + }
1.2896 + break;
1.2897 + case NONSTATIC_SHORT:
1.2898 + if( nonstatic_short_space_count > 0 ) {
1.2899 + real_offset = nonstatic_short_space_offset;
1.2900 + nonstatic_short_space_offset += BytesPerShort;
1.2901 + nonstatic_short_space_count -= 1;
1.2902 + } else {
1.2903 + real_offset = next_nonstatic_short_offset;
1.2904 + next_nonstatic_short_offset += BytesPerShort;
1.2905 + }
1.2906 + break;
1.2907 + case NONSTATIC_WORD:
1.2908 + if( nonstatic_word_space_count > 0 ) {
1.2909 + real_offset = nonstatic_word_space_offset;
1.2910 + nonstatic_word_space_offset += BytesPerInt;
1.2911 + nonstatic_word_space_count -= 1;
1.2912 + } else {
1.2913 + real_offset = next_nonstatic_word_offset;
1.2914 + next_nonstatic_word_offset += BytesPerInt;
1.2915 + }
1.2916 + break;
1.2917 + case NONSTATIC_ALIGNED_DOUBLE:
1.2918 + case NONSTATIC_DOUBLE:
1.2919 + real_offset = next_nonstatic_double_offset;
1.2920 + next_nonstatic_double_offset += BytesPerLong;
1.2921 + break;
1.2922 + default:
1.2923 + ShouldNotReachHere();
1.2924 + }
1.2925 + fields->short_at_put(i+4, extract_low_short_from_int(real_offset) );
1.2926 + fields->short_at_put(i+5, extract_high_short_from_int(real_offset) );
1.2927 + }
1.2928 +
1.2929 + // Size of instances
1.2930 + int instance_size;
1.2931 +
1.2932 + instance_size = align_object_size(next_nonstatic_type_offset / wordSize);
1.2933 +
1.2934 + assert(instance_size == align_object_size(instanceOopDesc::header_size() + nonstatic_field_size), "consistent layout helper value");
1.2935 +
1.2936 + // Size of non-static oop map blocks (in words) allocated at end of klass
1.2937 + int nonstatic_oop_map_size = compute_oop_map_size(super_klass, nonstatic_oop_map_count, first_nonstatic_oop_offset);
1.2938 +
1.2939 + // Compute reference type
1.2940 + ReferenceType rt;
1.2941 + if (super_klass() == NULL) {
1.2942 + rt = REF_NONE;
1.2943 + } else {
1.2944 + rt = super_klass->reference_type();
1.2945 + }
1.2946 +
1.2947 + // We can now create the basic klassOop for this klass
1.2948 + klassOop ik = oopFactory::new_instanceKlass(
1.2949 + vtable_size, itable_size,
1.2950 + static_field_size, nonstatic_oop_map_size,
1.2951 + rt, CHECK_(nullHandle));
1.2952 + instanceKlassHandle this_klass (THREAD, ik);
1.2953 +
1.2954 + assert(this_klass->static_field_size() == static_field_size &&
1.2955 + this_klass->nonstatic_oop_map_size() == nonstatic_oop_map_size, "sanity check");
1.2956 +
1.2957 + // Fill in information already parsed
1.2958 + this_klass->set_access_flags(access_flags);
1.2959 + jint lh = Klass::instance_layout_helper(instance_size, false);
1.2960 + this_klass->set_layout_helper(lh);
1.2961 + assert(this_klass->oop_is_instance(), "layout is correct");
1.2962 + assert(this_klass->size_helper() == instance_size, "correct size_helper");
1.2963 + // Not yet: supers are done below to support the new subtype-checking fields
1.2964 + //this_klass->set_super(super_klass());
1.2965 + this_klass->set_class_loader(class_loader());
1.2966 + this_klass->set_nonstatic_field_size(nonstatic_field_size);
1.2967 + this_klass->set_static_oop_field_size(fac.static_oop_count);
1.2968 + cp->set_pool_holder(this_klass());
1.2969 + this_klass->set_constants(cp());
1.2970 + this_klass->set_local_interfaces(local_interfaces());
1.2971 + this_klass->set_fields(fields());
1.2972 + this_klass->set_methods(methods());
1.2973 + if (has_final_method) {
1.2974 + this_klass->set_has_final_method();
1.2975 + }
1.2976 + this_klass->set_method_ordering(method_ordering());
1.2977 + this_klass->set_initial_method_idnum(methods->length());
1.2978 + this_klass->set_name(cp->klass_name_at(this_class_index));
1.2979 + this_klass->set_protection_domain(protection_domain());
1.2980 + this_klass->set_fields_annotations(fields_annotations());
1.2981 + this_klass->set_methods_annotations(methods_annotations());
1.2982 + this_klass->set_methods_parameter_annotations(methods_parameter_annotations());
1.2983 + this_klass->set_methods_default_annotations(methods_default_annotations());
1.2984 +
1.2985 + this_klass->set_minor_version(minor_version);
1.2986 + this_klass->set_major_version(major_version);
1.2987 +
1.2988 + if (cached_class_file_bytes != NULL) {
1.2989 + // JVMTI: we have an instanceKlass now, tell it about the cached bytes
1.2990 + this_klass->set_cached_class_file(cached_class_file_bytes,
1.2991 + cached_class_file_length);
1.2992 + }
1.2993 +
1.2994 + // Miranda methods
1.2995 + if ((num_miranda_methods > 0) ||
1.2996 + // if this class introduced new miranda methods or
1.2997 + (super_klass.not_null() && (super_klass->has_miranda_methods()))
1.2998 + // super class exists and this class inherited miranda methods
1.2999 + ) {
1.3000 + this_klass->set_has_miranda_methods(); // then set a flag
1.3001 + }
1.3002 +
1.3003 + // Additional attributes
1.3004 + parse_classfile_attributes(cp, this_klass, CHECK_(nullHandle));
1.3005 +
1.3006 + // Make sure this is the end of class file stream
1.3007 + guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle));
1.3008 +
1.3009 + // Initialize static fields
1.3010 + this_klass->do_local_static_fields(&initialize_static_field, CHECK_(nullHandle));
1.3011 +
1.3012 + // VerifyOops believes that once this has been set, the object is completely loaded.
1.3013 + // Compute transitive closure of interfaces this class implements
1.3014 + this_klass->set_transitive_interfaces(transitive_interfaces());
1.3015 +
1.3016 + // Fill in information needed to compute superclasses.
1.3017 + this_klass->initialize_supers(super_klass(), CHECK_(nullHandle));
1.3018 +
1.3019 + // Initialize itable offset tables
1.3020 + klassItable::setup_itable_offset_table(this_klass);
1.3021 +
1.3022 + // Do final class setup
1.3023 + fill_oop_maps(this_klass, nonstatic_oop_map_count, nonstatic_oop_offsets, nonstatic_oop_length);
1.3024 +
1.3025 + set_precomputed_flags(this_klass);
1.3026 +
1.3027 + // reinitialize modifiers, using the InnerClasses attribute
1.3028 + int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle));
1.3029 + this_klass->set_modifier_flags(computed_modifiers);
1.3030 +
1.3031 + // check if this class can access its super class
1.3032 + check_super_class_access(this_klass, CHECK_(nullHandle));
1.3033 +
1.3034 + // check if this class can access its superinterfaces
1.3035 + check_super_interface_access(this_klass, CHECK_(nullHandle));
1.3036 +
1.3037 + // check if this class overrides any final method
1.3038 + check_final_method_override(this_klass, CHECK_(nullHandle));
1.3039 +
1.3040 + // check that if this class is an interface then it doesn't have static methods
1.3041 + if (this_klass->is_interface()) {
1.3042 + check_illegal_static_method(this_klass, CHECK_(nullHandle));
1.3043 + }
1.3044 +
1.3045 + ClassLoadingService::notify_class_loaded(instanceKlass::cast(this_klass()),
1.3046 + false /* not shared class */);
1.3047 +
1.3048 + if (TraceClassLoading) {
1.3049 + // print in a single call to reduce interleaving of output
1.3050 + if (cfs->source() != NULL) {
1.3051 + tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
1.3052 + cfs->source());
1.3053 + } else if (class_loader.is_null()) {
1.3054 + if (THREAD->is_Java_thread()) {
1.3055 + klassOop caller = ((JavaThread*)THREAD)->security_get_caller_class(1);
1.3056 + tty->print("[Loaded %s by instance of %s]\n",
1.3057 + this_klass->external_name(),
1.3058 + instanceKlass::cast(caller)->external_name());
1.3059 + } else {
1.3060 + tty->print("[Loaded %s]\n", this_klass->external_name());
1.3061 + }
1.3062 + } else {
1.3063 + ResourceMark rm;
1.3064 + tty->print("[Loaded %s from %s]\n", this_klass->external_name(),
1.3065 + instanceKlass::cast(class_loader->klass())->external_name());
1.3066 + }
1.3067 + }
1.3068 +
1.3069 + if (TraceClassResolution) {
1.3070 + // print out the superclass.
1.3071 + const char * from = Klass::cast(this_klass())->external_name();
1.3072 + if (this_klass->java_super() != NULL) {
1.3073 + tty->print("RESOLVE %s %s\n", from, instanceKlass::cast(this_klass->java_super())->external_name());
1.3074 + }
1.3075 + // print out each of the interface classes referred to by this class.
1.3076 + objArrayHandle local_interfaces(THREAD, this_klass->local_interfaces());
1.3077 + if (!local_interfaces.is_null()) {
1.3078 + int length = local_interfaces->length();
1.3079 + for (int i = 0; i < length; i++) {
1.3080 + klassOop k = klassOop(local_interfaces->obj_at(i));
1.3081 + instanceKlass* to_class = instanceKlass::cast(k);
1.3082 + const char * to = to_class->external_name();
1.3083 + tty->print("RESOLVE %s %s\n", from, to);
1.3084 + }
1.3085 + }
1.3086 + }
1.3087 +
1.3088 +#ifndef PRODUCT
1.3089 + if( PrintCompactFieldsSavings ) {
1.3090 + if( nonstatic_field_size < orig_nonstatic_field_size ) {
1.3091 + tty->print("[Saved %d of %3d words in %s]\n",
1.3092 + orig_nonstatic_field_size - nonstatic_field_size,
1.3093 + orig_nonstatic_field_size, this_klass->external_name());
1.3094 + } else if( nonstatic_field_size > orig_nonstatic_field_size ) {
1.3095 + tty->print("[Wasted %d over %3d words in %s]\n",
1.3096 + nonstatic_field_size - orig_nonstatic_field_size,
1.3097 + orig_nonstatic_field_size, this_klass->external_name());
1.3098 + }
1.3099 + }
1.3100 +#endif
1.3101 +
1.3102 + // preserve result across HandleMark
1.3103 + preserve_this_klass = this_klass();
1.3104 + }
1.3105 +
1.3106 + // Create new handle outside HandleMark
1.3107 + instanceKlassHandle this_klass (THREAD, preserve_this_klass);
1.3108 + debug_only(this_klass->as_klassOop()->verify();)
1.3109 +
1.3110 + return this_klass;
1.3111 +}
1.3112 +
1.3113 +
1.3114 +int ClassFileParser::compute_oop_map_size(instanceKlassHandle super, int nonstatic_oop_map_count, int first_nonstatic_oop_offset) {
1.3115 + int map_size = super.is_null() ? 0 : super->nonstatic_oop_map_size();
1.3116 + if (nonstatic_oop_map_count > 0) {
1.3117 + // We have oops to add to map
1.3118 + if (map_size == 0) {
1.3119 + map_size = nonstatic_oop_map_count;
1.3120 + } else {
1.3121 + // Check whether we should add a new map block or whether the last one can be extended
1.3122 + OopMapBlock* first_map = super->start_of_nonstatic_oop_maps();
1.3123 + OopMapBlock* last_map = first_map + map_size - 1;
1.3124 +
1.3125 + int next_offset = last_map->offset() + (last_map->length() * oopSize);
1.3126 + if (next_offset == first_nonstatic_oop_offset) {
1.3127 + // There is no gap bettwen superklass's last oop field and first
1.3128 + // local oop field, merge maps.
1.3129 + nonstatic_oop_map_count -= 1;
1.3130 + } else {
1.3131 + // Superklass didn't end with a oop field, add extra maps
1.3132 + assert(next_offset<first_nonstatic_oop_offset, "just checking");
1.3133 + }
1.3134 + map_size += nonstatic_oop_map_count;
1.3135 + }
1.3136 + }
1.3137 + return map_size;
1.3138 +}
1.3139 +
1.3140 +
1.3141 +void ClassFileParser::fill_oop_maps(instanceKlassHandle k,
1.3142 + int nonstatic_oop_map_count,
1.3143 + u2* nonstatic_oop_offsets, u2* nonstatic_oop_length) {
1.3144 + OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps();
1.3145 + OopMapBlock* last_oop_map = this_oop_map + k->nonstatic_oop_map_size();
1.3146 + instanceKlass* super = k->superklass();
1.3147 + if (super != NULL) {
1.3148 + int super_oop_map_size = super->nonstatic_oop_map_size();
1.3149 + OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps();
1.3150 + // Copy maps from superklass
1.3151 + while (super_oop_map_size-- > 0) {
1.3152 + *this_oop_map++ = *super_oop_map++;
1.3153 + }
1.3154 + }
1.3155 + if (nonstatic_oop_map_count > 0) {
1.3156 + if (this_oop_map + nonstatic_oop_map_count > last_oop_map) {
1.3157 + // Calculated in compute_oop_map_size() number of oop maps is less then
1.3158 + // collected oop maps since there is no gap between superklass's last oop
1.3159 + // field and first local oop field. Extend the last oop map copied
1.3160 + // from the superklass instead of creating new one.
1.3161 + nonstatic_oop_map_count--;
1.3162 + nonstatic_oop_offsets++;
1.3163 + this_oop_map--;
1.3164 + this_oop_map->set_length(this_oop_map->length() + *nonstatic_oop_length++);
1.3165 + this_oop_map++;
1.3166 + }
1.3167 + assert((this_oop_map + nonstatic_oop_map_count) == last_oop_map, "just checking");
1.3168 + // Add new map blocks, fill them
1.3169 + while (nonstatic_oop_map_count-- > 0) {
1.3170 + this_oop_map->set_offset(*nonstatic_oop_offsets++);
1.3171 + this_oop_map->set_length(*nonstatic_oop_length++);
1.3172 + this_oop_map++;
1.3173 + }
1.3174 + }
1.3175 +}
1.3176 +
1.3177 +
1.3178 +void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) {
1.3179 + klassOop super = k->super();
1.3180 +
1.3181 + // Check if this klass has an empty finalize method (i.e. one with return bytecode only),
1.3182 + // in which case we don't have to register objects as finalizable
1.3183 + if (!_has_empty_finalizer) {
1.3184 + if (_has_finalizer ||
1.3185 + (super != NULL && super->klass_part()->has_finalizer())) {
1.3186 + k->set_has_finalizer();
1.3187 + }
1.3188 + }
1.3189 +
1.3190 +#ifdef ASSERT
1.3191 + bool f = false;
1.3192 + methodOop m = k->lookup_method(vmSymbols::finalize_method_name(),
1.3193 + vmSymbols::void_method_signature());
1.3194 + if (m != NULL && !m->is_empty_method()) {
1.3195 + f = true;
1.3196 + }
1.3197 + assert(f == k->has_finalizer(), "inconsistent has_finalizer");
1.3198 +#endif
1.3199 +
1.3200 + // Check if this klass supports the java.lang.Cloneable interface
1.3201 + if (SystemDictionary::cloneable_klass_loaded()) {
1.3202 + if (k->is_subtype_of(SystemDictionary::cloneable_klass())) {
1.3203 + k->set_is_cloneable();
1.3204 + }
1.3205 + }
1.3206 +
1.3207 + // Check if this klass has a vanilla default constructor
1.3208 + if (super == NULL) {
1.3209 + // java.lang.Object has empty default constructor
1.3210 + k->set_has_vanilla_constructor();
1.3211 + } else {
1.3212 + if (Klass::cast(super)->has_vanilla_constructor() &&
1.3213 + _has_vanilla_constructor) {
1.3214 + k->set_has_vanilla_constructor();
1.3215 + }
1.3216 +#ifdef ASSERT
1.3217 + bool v = false;
1.3218 + if (Klass::cast(super)->has_vanilla_constructor()) {
1.3219 + methodOop constructor = k->find_method(vmSymbols::object_initializer_name(
1.3220 +), vmSymbols::void_method_signature());
1.3221 + if (constructor != NULL && constructor->is_vanilla_constructor()) {
1.3222 + v = true;
1.3223 + }
1.3224 + }
1.3225 + assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor");
1.3226 +#endif
1.3227 + }
1.3228 +
1.3229 + // If it cannot be fast-path allocated, set a bit in the layout helper.
1.3230 + // See documentation of instanceKlass::can_be_fastpath_allocated().
1.3231 + assert(k->size_helper() > 0, "layout_helper is initialized");
1.3232 + if ((!RegisterFinalizersAtInit && k->has_finalizer())
1.3233 + || k->is_abstract() || k->is_interface()
1.3234 + || (k->name() == vmSymbols::java_lang_Class()
1.3235 + && k->class_loader() == NULL)
1.3236 + || k->size_helper() >= FastAllocateSizeLimit) {
1.3237 + // Forbid fast-path allocation.
1.3238 + jint lh = Klass::instance_layout_helper(k->size_helper(), true);
1.3239 + k->set_layout_helper(lh);
1.3240 + }
1.3241 +}
1.3242 +
1.3243 +
1.3244 +// utility method for appending and array with check for duplicates
1.3245 +
1.3246 +void append_interfaces(objArrayHandle result, int& index, objArrayOop ifs) {
1.3247 + // iterate over new interfaces
1.3248 + for (int i = 0; i < ifs->length(); i++) {
1.3249 + oop e = ifs->obj_at(i);
1.3250 + assert(e->is_klass() && instanceKlass::cast(klassOop(e))->is_interface(), "just checking");
1.3251 + // check for duplicates
1.3252 + bool duplicate = false;
1.3253 + for (int j = 0; j < index; j++) {
1.3254 + if (result->obj_at(j) == e) {
1.3255 + duplicate = true;
1.3256 + break;
1.3257 + }
1.3258 + }
1.3259 + // add new interface
1.3260 + if (!duplicate) {
1.3261 + result->obj_at_put(index++, e);
1.3262 + }
1.3263 + }
1.3264 +}
1.3265 +
1.3266 +objArrayHandle ClassFileParser::compute_transitive_interfaces(instanceKlassHandle super, objArrayHandle local_ifs, TRAPS) {
1.3267 + // Compute maximum size for transitive interfaces
1.3268 + int max_transitive_size = 0;
1.3269 + int super_size = 0;
1.3270 + // Add superclass transitive interfaces size
1.3271 + if (super.not_null()) {
1.3272 + super_size = super->transitive_interfaces()->length();
1.3273 + max_transitive_size += super_size;
1.3274 + }
1.3275 + // Add local interfaces' super interfaces
1.3276 + int local_size = local_ifs->length();
1.3277 + for (int i = 0; i < local_size; i++) {
1.3278 + klassOop l = klassOop(local_ifs->obj_at(i));
1.3279 + max_transitive_size += instanceKlass::cast(l)->transitive_interfaces()->length();
1.3280 + }
1.3281 + // Finally add local interfaces
1.3282 + max_transitive_size += local_size;
1.3283 + // Construct array
1.3284 + objArrayHandle result;
1.3285 + if (max_transitive_size == 0) {
1.3286 + // no interfaces, use canonicalized array
1.3287 + result = objArrayHandle(THREAD, Universe::the_empty_system_obj_array());
1.3288 + } else if (max_transitive_size == super_size) {
1.3289 + // no new local interfaces added, share superklass' transitive interface array
1.3290 + result = objArrayHandle(THREAD, super->transitive_interfaces());
1.3291 + } else if (max_transitive_size == local_size) {
1.3292 + // only local interfaces added, share local interface array
1.3293 + result = local_ifs;
1.3294 + } else {
1.3295 + objArrayHandle nullHandle;
1.3296 + objArrayOop new_objarray = oopFactory::new_system_objArray(max_transitive_size, CHECK_(nullHandle));
1.3297 + result = objArrayHandle(THREAD, new_objarray);
1.3298 + int index = 0;
1.3299 + // Copy down from superclass
1.3300 + if (super.not_null()) {
1.3301 + append_interfaces(result, index, super->transitive_interfaces());
1.3302 + }
1.3303 + // Copy down from local interfaces' superinterfaces
1.3304 + for (int i = 0; i < local_ifs->length(); i++) {
1.3305 + klassOop l = klassOop(local_ifs->obj_at(i));
1.3306 + append_interfaces(result, index, instanceKlass::cast(l)->transitive_interfaces());
1.3307 + }
1.3308 + // Finally add local interfaces
1.3309 + append_interfaces(result, index, local_ifs());
1.3310 +
1.3311 + // Check if duplicates were removed
1.3312 + if (index != max_transitive_size) {
1.3313 + assert(index < max_transitive_size, "just checking");
1.3314 + objArrayOop new_result = oopFactory::new_system_objArray(index, CHECK_(nullHandle));
1.3315 + for (int i = 0; i < index; i++) {
1.3316 + oop e = result->obj_at(i);
1.3317 + assert(e != NULL, "just checking");
1.3318 + new_result->obj_at_put(i, e);
1.3319 + }
1.3320 + result = objArrayHandle(THREAD, new_result);
1.3321 + }
1.3322 + }
1.3323 + return result;
1.3324 +}
1.3325 +
1.3326 +
1.3327 +void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) {
1.3328 + klassOop super = this_klass->super();
1.3329 + if ((super != NULL) &&
1.3330 + (!Reflection::verify_class_access(this_klass->as_klassOop(), super, false))) {
1.3331 + ResourceMark rm(THREAD);
1.3332 + Exceptions::fthrow(
1.3333 + THREAD_AND_LOCATION,
1.3334 + vmSymbolHandles::java_lang_IllegalAccessError(),
1.3335 + "class %s cannot access its superclass %s",
1.3336 + this_klass->external_name(),
1.3337 + instanceKlass::cast(super)->external_name()
1.3338 + );
1.3339 + return;
1.3340 + }
1.3341 +}
1.3342 +
1.3343 +
1.3344 +void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) {
1.3345 + objArrayHandle local_interfaces (THREAD, this_klass->local_interfaces());
1.3346 + int lng = local_interfaces->length();
1.3347 + for (int i = lng - 1; i >= 0; i--) {
1.3348 + klassOop k = klassOop(local_interfaces->obj_at(i));
1.3349 + assert (k != NULL && Klass::cast(k)->is_interface(), "invalid interface");
1.3350 + if (!Reflection::verify_class_access(this_klass->as_klassOop(), k, false)) {
1.3351 + ResourceMark rm(THREAD);
1.3352 + Exceptions::fthrow(
1.3353 + THREAD_AND_LOCATION,
1.3354 + vmSymbolHandles::java_lang_IllegalAccessError(),
1.3355 + "class %s cannot access its superinterface %s",
1.3356 + this_klass->external_name(),
1.3357 + instanceKlass::cast(k)->external_name()
1.3358 + );
1.3359 + return;
1.3360 + }
1.3361 + }
1.3362 +}
1.3363 +
1.3364 +
1.3365 +void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) {
1.3366 + objArrayHandle methods (THREAD, this_klass->methods());
1.3367 + int num_methods = methods->length();
1.3368 +
1.3369 + // go thru each method and check if it overrides a final method
1.3370 + for (int index = 0; index < num_methods; index++) {
1.3371 + methodOop m = (methodOop)methods->obj_at(index);
1.3372 +
1.3373 + // skip private, static and <init> methods
1.3374 + if ((!m->is_private()) &&
1.3375 + (!m->is_static()) &&
1.3376 + (m->name() != vmSymbols::object_initializer_name())) {
1.3377 +
1.3378 + symbolOop name = m->name();
1.3379 + symbolOop signature = m->signature();
1.3380 + klassOop k = this_klass->super();
1.3381 + methodOop super_m = NULL;
1.3382 + while (k != NULL) {
1.3383 + // skip supers that don't have final methods.
1.3384 + if (k->klass_part()->has_final_method()) {
1.3385 + // lookup a matching method in the super class hierarchy
1.3386 + super_m = instanceKlass::cast(k)->lookup_method(name, signature);
1.3387 + if (super_m == NULL) {
1.3388 + break; // didn't find any match; get out
1.3389 + }
1.3390 +
1.3391 + if (super_m->is_final() &&
1.3392 + // matching method in super is final
1.3393 + (Reflection::verify_field_access(this_klass->as_klassOop(),
1.3394 + super_m->method_holder(),
1.3395 + super_m->method_holder(),
1.3396 + super_m->access_flags(), false))
1.3397 + // this class can access super final method and therefore override
1.3398 + ) {
1.3399 + ResourceMark rm(THREAD);
1.3400 + Exceptions::fthrow(
1.3401 + THREAD_AND_LOCATION,
1.3402 + vmSymbolHandles::java_lang_VerifyError(),
1.3403 + "class %s overrides final method %s.%s",
1.3404 + this_klass->external_name(),
1.3405 + name->as_C_string(),
1.3406 + signature->as_C_string()
1.3407 + );
1.3408 + return;
1.3409 + }
1.3410 +
1.3411 + // continue to look from super_m's holder's super.
1.3412 + k = instanceKlass::cast(super_m->method_holder())->super();
1.3413 + continue;
1.3414 + }
1.3415 +
1.3416 + k = k->klass_part()->super();
1.3417 + }
1.3418 + }
1.3419 + }
1.3420 +}
1.3421 +
1.3422 +
1.3423 +// assumes that this_klass is an interface
1.3424 +void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) {
1.3425 + assert(this_klass->is_interface(), "not an interface");
1.3426 + objArrayHandle methods (THREAD, this_klass->methods());
1.3427 + int num_methods = methods->length();
1.3428 +
1.3429 + for (int index = 0; index < num_methods; index++) {
1.3430 + methodOop m = (methodOop)methods->obj_at(index);
1.3431 + // if m is static and not the init method, throw a verify error
1.3432 + if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) {
1.3433 + ResourceMark rm(THREAD);
1.3434 + Exceptions::fthrow(
1.3435 + THREAD_AND_LOCATION,
1.3436 + vmSymbolHandles::java_lang_VerifyError(),
1.3437 + "Illegal static method %s in interface %s",
1.3438 + m->name()->as_C_string(),
1.3439 + this_klass->external_name()
1.3440 + );
1.3441 + return;
1.3442 + }
1.3443 + }
1.3444 +}
1.3445 +
1.3446 +// utility methods for format checking
1.3447 +
1.3448 +void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) {
1.3449 + if (!_need_verify) { return; }
1.3450 +
1.3451 + const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0;
1.3452 + const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
1.3453 + const bool is_final = (flags & JVM_ACC_FINAL) != 0;
1.3454 + const bool is_super = (flags & JVM_ACC_SUPER) != 0;
1.3455 + const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
1.3456 + const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0;
1.3457 + const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
1.3458 +
1.3459 + if ((is_abstract && is_final) ||
1.3460 + (is_interface && !is_abstract) ||
1.3461 + (is_interface && major_gte_15 && (is_super || is_enum)) ||
1.3462 + (!is_interface && major_gte_15 && is_annotation)) {
1.3463 + ResourceMark rm(THREAD);
1.3464 + Exceptions::fthrow(
1.3465 + THREAD_AND_LOCATION,
1.3466 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3467 + "Illegal class modifiers in class %s: 0x%X",
1.3468 + _class_name->as_C_string(), flags
1.3469 + );
1.3470 + return;
1.3471 + }
1.3472 +}
1.3473 +
1.3474 +bool ClassFileParser::has_illegal_visibility(jint flags) {
1.3475 + const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
1.3476 + const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
1.3477 + const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
1.3478 +
1.3479 + return ((is_public && is_protected) ||
1.3480 + (is_public && is_private) ||
1.3481 + (is_protected && is_private));
1.3482 +}
1.3483 +
1.3484 +bool ClassFileParser::is_supported_version(u2 major, u2 minor) {
1.3485 + return (major >= JAVA_MIN_SUPPORTED_VERSION) &&
1.3486 + (major <= JAVA_MAX_SUPPORTED_VERSION) &&
1.3487 + ((major != JAVA_MAX_SUPPORTED_VERSION) ||
1.3488 + (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION));
1.3489 +}
1.3490 +
1.3491 +void ClassFileParser::verify_legal_field_modifiers(
1.3492 + jint flags, bool is_interface, TRAPS) {
1.3493 + if (!_need_verify) { return; }
1.3494 +
1.3495 + const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
1.3496 + const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0;
1.3497 + const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
1.3498 + const bool is_static = (flags & JVM_ACC_STATIC) != 0;
1.3499 + const bool is_final = (flags & JVM_ACC_FINAL) != 0;
1.3500 + const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0;
1.3501 + const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0;
1.3502 + const bool is_enum = (flags & JVM_ACC_ENUM) != 0;
1.3503 + const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
1.3504 +
1.3505 + bool is_illegal = false;
1.3506 +
1.3507 + if (is_interface) {
1.3508 + if (!is_public || !is_static || !is_final || is_private ||
1.3509 + is_protected || is_volatile || is_transient ||
1.3510 + (major_gte_15 && is_enum)) {
1.3511 + is_illegal = true;
1.3512 + }
1.3513 + } else { // not interface
1.3514 + if (has_illegal_visibility(flags) || (is_final && is_volatile)) {
1.3515 + is_illegal = true;
1.3516 + }
1.3517 + }
1.3518 +
1.3519 + if (is_illegal) {
1.3520 + ResourceMark rm(THREAD);
1.3521 + Exceptions::fthrow(
1.3522 + THREAD_AND_LOCATION,
1.3523 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3524 + "Illegal field modifiers in class %s: 0x%X",
1.3525 + _class_name->as_C_string(), flags);
1.3526 + return;
1.3527 + }
1.3528 +}
1.3529 +
1.3530 +void ClassFileParser::verify_legal_method_modifiers(
1.3531 + jint flags, bool is_interface, symbolHandle name, TRAPS) {
1.3532 + if (!_need_verify) { return; }
1.3533 +
1.3534 + const bool is_public = (flags & JVM_ACC_PUBLIC) != 0;
1.3535 + const bool is_private = (flags & JVM_ACC_PRIVATE) != 0;
1.3536 + const bool is_static = (flags & JVM_ACC_STATIC) != 0;
1.3537 + const bool is_final = (flags & JVM_ACC_FINAL) != 0;
1.3538 + const bool is_native = (flags & JVM_ACC_NATIVE) != 0;
1.3539 + const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0;
1.3540 + const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0;
1.3541 + const bool is_strict = (flags & JVM_ACC_STRICT) != 0;
1.3542 + const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0;
1.3543 + const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION;
1.3544 + const bool is_initializer = (name == vmSymbols::object_initializer_name());
1.3545 +
1.3546 + bool is_illegal = false;
1.3547 +
1.3548 + if (is_interface) {
1.3549 + if (!is_abstract || !is_public || is_static || is_final ||
1.3550 + is_native || (major_gte_15 && (is_synchronized || is_strict))) {
1.3551 + is_illegal = true;
1.3552 + }
1.3553 + } else { // not interface
1.3554 + if (is_initializer) {
1.3555 + if (is_static || is_final || is_synchronized || is_native ||
1.3556 + is_abstract || (major_gte_15 && is_bridge)) {
1.3557 + is_illegal = true;
1.3558 + }
1.3559 + } else { // not initializer
1.3560 + if (is_abstract) {
1.3561 + if ((is_final || is_native || is_private || is_static ||
1.3562 + (major_gte_15 && (is_synchronized || is_strict)))) {
1.3563 + is_illegal = true;
1.3564 + }
1.3565 + }
1.3566 + if (has_illegal_visibility(flags)) {
1.3567 + is_illegal = true;
1.3568 + }
1.3569 + }
1.3570 + }
1.3571 +
1.3572 + if (is_illegal) {
1.3573 + ResourceMark rm(THREAD);
1.3574 + Exceptions::fthrow(
1.3575 + THREAD_AND_LOCATION,
1.3576 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3577 + "Method %s in class %s has illegal modifiers: 0x%X",
1.3578 + name->as_C_string(), _class_name->as_C_string(), flags);
1.3579 + return;
1.3580 + }
1.3581 +}
1.3582 +
1.3583 +void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) {
1.3584 + assert(_need_verify, "only called when _need_verify is true");
1.3585 + int i = 0;
1.3586 + int count = length >> 2;
1.3587 + for (int k=0; k<count; k++) {
1.3588 + unsigned char b0 = buffer[i];
1.3589 + unsigned char b1 = buffer[i+1];
1.3590 + unsigned char b2 = buffer[i+2];
1.3591 + unsigned char b3 = buffer[i+3];
1.3592 + // For an unsigned char v,
1.3593 + // (v | v - 1) is < 128 (highest bit 0) for 0 < v < 128;
1.3594 + // (v | v - 1) is >= 128 (highest bit 1) for v == 0 or v >= 128.
1.3595 + unsigned char res = b0 | b0 - 1 |
1.3596 + b1 | b1 - 1 |
1.3597 + b2 | b2 - 1 |
1.3598 + b3 | b3 - 1;
1.3599 + if (res >= 128) break;
1.3600 + i += 4;
1.3601 + }
1.3602 + for(; i < length; i++) {
1.3603 + unsigned short c;
1.3604 + // no embedded zeros
1.3605 + guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK);
1.3606 + if(buffer[i] < 128) {
1.3607 + continue;
1.3608 + }
1.3609 + if ((i + 5) < length) { // see if it's legal supplementary character
1.3610 + if (UTF8::is_supplementary_character(&buffer[i])) {
1.3611 + c = UTF8::get_supplementary_character(&buffer[i]);
1.3612 + i += 5;
1.3613 + continue;
1.3614 + }
1.3615 + }
1.3616 + switch (buffer[i] >> 4) {
1.3617 + default: break;
1.3618 + case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
1.3619 + classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
1.3620 + case 0xC: case 0xD: // 110xxxxx 10xxxxxx
1.3621 + c = (buffer[i] & 0x1F) << 6;
1.3622 + i++;
1.3623 + if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) {
1.3624 + c += buffer[i] & 0x3F;
1.3625 + if (_major_version <= 47 || c == 0 || c >= 0x80) {
1.3626 + // for classes with major > 47, c must a null or a character in its shortest form
1.3627 + break;
1.3628 + }
1.3629 + }
1.3630 + classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
1.3631 + case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx
1.3632 + c = (buffer[i] & 0xF) << 12;
1.3633 + i += 2;
1.3634 + if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) {
1.3635 + c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F);
1.3636 + if (_major_version <= 47 || c >= 0x800) {
1.3637 + // for classes with major > 47, c must be in its shortest form
1.3638 + break;
1.3639 + }
1.3640 + }
1.3641 + classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK);
1.3642 + } // end of switch
1.3643 + } // end of for
1.3644 +}
1.3645 +
1.3646 +// Checks if name is a legal class name.
1.3647 +void ClassFileParser::verify_legal_class_name(symbolHandle name, TRAPS) {
1.3648 + if (!_need_verify || _relax_verify) { return; }
1.3649 +
1.3650 + char buf[fixed_buffer_size];
1.3651 + char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
1.3652 + unsigned int length = name->utf8_length();
1.3653 + bool legal = false;
1.3654 +
1.3655 + if (length > 0) {
1.3656 + char* p;
1.3657 + if (bytes[0] == JVM_SIGNATURE_ARRAY) {
1.3658 + p = skip_over_field_signature(bytes, false, length, CHECK);
1.3659 + legal = (p != NULL) && ((p - bytes) == (int)length);
1.3660 + } else if (_major_version < JAVA_1_5_VERSION) {
1.3661 + if (bytes[0] != '<') {
1.3662 + p = skip_over_field_name(bytes, true, length);
1.3663 + legal = (p != NULL) && ((p - bytes) == (int)length);
1.3664 + }
1.3665 + } else {
1.3666 + // 4900761: relax the constraints based on JSR202 spec
1.3667 + // Class names may be drawn from the entire Unicode character set.
1.3668 + // Identifiers between '/' must be unqualified names.
1.3669 + // The utf8 string has been verified when parsing cpool entries.
1.3670 + legal = verify_unqualified_name(bytes, length, LegalClass);
1.3671 + }
1.3672 + }
1.3673 + if (!legal) {
1.3674 + ResourceMark rm(THREAD);
1.3675 + Exceptions::fthrow(
1.3676 + THREAD_AND_LOCATION,
1.3677 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3678 + "Illegal class name \"%s\" in class file %s", bytes,
1.3679 + _class_name->as_C_string()
1.3680 + );
1.3681 + return;
1.3682 + }
1.3683 +}
1.3684 +
1.3685 +// Checks if name is a legal field name.
1.3686 +void ClassFileParser::verify_legal_field_name(symbolHandle name, TRAPS) {
1.3687 + if (!_need_verify || _relax_verify) { return; }
1.3688 +
1.3689 + char buf[fixed_buffer_size];
1.3690 + char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
1.3691 + unsigned int length = name->utf8_length();
1.3692 + bool legal = false;
1.3693 +
1.3694 + if (length > 0) {
1.3695 + if (_major_version < JAVA_1_5_VERSION) {
1.3696 + if (bytes[0] != '<') {
1.3697 + char* p = skip_over_field_name(bytes, false, length);
1.3698 + legal = (p != NULL) && ((p - bytes) == (int)length);
1.3699 + }
1.3700 + } else {
1.3701 + // 4881221: relax the constraints based on JSR202 spec
1.3702 + legal = verify_unqualified_name(bytes, length, LegalField);
1.3703 + }
1.3704 + }
1.3705 +
1.3706 + if (!legal) {
1.3707 + ResourceMark rm(THREAD);
1.3708 + Exceptions::fthrow(
1.3709 + THREAD_AND_LOCATION,
1.3710 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3711 + "Illegal field name \"%s\" in class %s", bytes,
1.3712 + _class_name->as_C_string()
1.3713 + );
1.3714 + return;
1.3715 + }
1.3716 +}
1.3717 +
1.3718 +// Checks if name is a legal method name.
1.3719 +void ClassFileParser::verify_legal_method_name(symbolHandle name, TRAPS) {
1.3720 + if (!_need_verify || _relax_verify) { return; }
1.3721 +
1.3722 + assert(!name.is_null(), "method name is null");
1.3723 + char buf[fixed_buffer_size];
1.3724 + char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
1.3725 + unsigned int length = name->utf8_length();
1.3726 + bool legal = false;
1.3727 +
1.3728 + if (length > 0) {
1.3729 + if (bytes[0] == '<') {
1.3730 + if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) {
1.3731 + legal = true;
1.3732 + }
1.3733 + } else if (_major_version < JAVA_1_5_VERSION) {
1.3734 + char* p;
1.3735 + p = skip_over_field_name(bytes, false, length);
1.3736 + legal = (p != NULL) && ((p - bytes) == (int)length);
1.3737 + } else {
1.3738 + // 4881221: relax the constraints based on JSR202 spec
1.3739 + legal = verify_unqualified_name(bytes, length, LegalMethod);
1.3740 + }
1.3741 + }
1.3742 +
1.3743 + if (!legal) {
1.3744 + ResourceMark rm(THREAD);
1.3745 + Exceptions::fthrow(
1.3746 + THREAD_AND_LOCATION,
1.3747 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3748 + "Illegal method name \"%s\" in class %s", bytes,
1.3749 + _class_name->as_C_string()
1.3750 + );
1.3751 + return;
1.3752 + }
1.3753 +}
1.3754 +
1.3755 +
1.3756 +// Checks if signature is a legal field signature.
1.3757 +void ClassFileParser::verify_legal_field_signature(symbolHandle name, symbolHandle signature, TRAPS) {
1.3758 + if (!_need_verify) { return; }
1.3759 +
1.3760 + char buf[fixed_buffer_size];
1.3761 + char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
1.3762 + unsigned int length = signature->utf8_length();
1.3763 + char* p = skip_over_field_signature(bytes, false, length, CHECK);
1.3764 +
1.3765 + if (p == NULL || (p - bytes) != (int)length) {
1.3766 + ResourceMark rm(THREAD);
1.3767 + Exceptions::fthrow(
1.3768 + THREAD_AND_LOCATION,
1.3769 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3770 + "Field \"%s\" in class %s has illegal signature \"%s\"",
1.3771 + name->as_C_string(), _class_name->as_C_string(), bytes
1.3772 + );
1.3773 + return;
1.3774 + }
1.3775 +}
1.3776 +
1.3777 +// Checks if signature is a legal method signature.
1.3778 +// Returns number of parameters
1.3779 +int ClassFileParser::verify_legal_method_signature(symbolHandle name, symbolHandle signature, TRAPS) {
1.3780 + if (!_need_verify) {
1.3781 + // make sure caller's args_size will be less than 0 even for non-static
1.3782 + // method so it will be recomputed in compute_size_of_parameters().
1.3783 + return -2;
1.3784 + }
1.3785 +
1.3786 + unsigned int args_size = 0;
1.3787 + char buf[fixed_buffer_size];
1.3788 + char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size);
1.3789 + unsigned int length = signature->utf8_length();
1.3790 + char* nextp;
1.3791 +
1.3792 + // The first character must be a '('
1.3793 + if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) {
1.3794 + length--;
1.3795 + // Skip over legal field signatures
1.3796 + nextp = skip_over_field_signature(p, false, length, CHECK_0);
1.3797 + while ((length > 0) && (nextp != NULL)) {
1.3798 + args_size++;
1.3799 + if (p[0] == 'J' || p[0] == 'D') {
1.3800 + args_size++;
1.3801 + }
1.3802 + length -= nextp - p;
1.3803 + p = nextp;
1.3804 + nextp = skip_over_field_signature(p, false, length, CHECK_0);
1.3805 + }
1.3806 + // The first non-signature thing better be a ')'
1.3807 + if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) {
1.3808 + length--;
1.3809 + if (name->utf8_length() > 0 && name->byte_at(0) == '<') {
1.3810 + // All internal methods must return void
1.3811 + if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) {
1.3812 + return args_size;
1.3813 + }
1.3814 + } else {
1.3815 + // Now we better just have a return value
1.3816 + nextp = skip_over_field_signature(p, true, length, CHECK_0);
1.3817 + if (nextp && ((int)length == (nextp - p))) {
1.3818 + return args_size;
1.3819 + }
1.3820 + }
1.3821 + }
1.3822 + }
1.3823 + // Report error
1.3824 + ResourceMark rm(THREAD);
1.3825 + Exceptions::fthrow(
1.3826 + THREAD_AND_LOCATION,
1.3827 + vmSymbolHandles::java_lang_ClassFormatError(),
1.3828 + "Method \"%s\" in class %s has illegal signature \"%s\"",
1.3829 + name->as_C_string(), _class_name->as_C_string(), p
1.3830 + );
1.3831 + return 0;
1.3832 +}
1.3833 +
1.3834 +
1.3835 +// Unqualified names may not contain the characters '.', ';', or '/'.
1.3836 +// Method names also may not contain the characters '<' or '>', unless <init> or <clinit>.
1.3837 +// Note that method names may not be <init> or <clinit> in this method.
1.3838 +// Because these names have been checked as special cases before calling this method
1.3839 +// in verify_legal_method_name.
1.3840 +bool ClassFileParser::verify_unqualified_name(char* name, unsigned int length, int type) {
1.3841 + jchar ch;
1.3842 +
1.3843 + for (char* p = name; p != name + length; ) {
1.3844 + ch = *p;
1.3845 + if (ch < 128) {
1.3846 + p++;
1.3847 + if (ch == '.' || ch == ';') {
1.3848 + return false; // do not permit '.' or ';'
1.3849 + }
1.3850 + if (type != LegalClass && ch == '/') {
1.3851 + return false; // do not permit '/' unless it's class name
1.3852 + }
1.3853 + if (type == LegalMethod && (ch == '<' || ch == '>')) {
1.3854 + return false; // do not permit '<' or '>' in method names
1.3855 + }
1.3856 + } else {
1.3857 + char* tmp_p = UTF8::next(p, &ch);
1.3858 + p = tmp_p;
1.3859 + }
1.3860 + }
1.3861 + return true;
1.3862 +}
1.3863 +
1.3864 +
1.3865 +// Take pointer to a string. Skip over the longest part of the string that could
1.3866 +// be taken as a fieldname. Allow '/' if slash_ok is true.
1.3867 +// Return a pointer to just past the fieldname.
1.3868 +// Return NULL if no fieldname at all was found, or in the case of slash_ok
1.3869 +// being true, we saw consecutive slashes (meaning we were looking for a
1.3870 +// qualified path but found something that was badly-formed).
1.3871 +char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) {
1.3872 + char* p;
1.3873 + jchar ch;
1.3874 + jboolean last_is_slash = false;
1.3875 + jboolean not_first_ch = false;
1.3876 +
1.3877 + for (p = name; p != name + length; not_first_ch = true) {
1.3878 + char* old_p = p;
1.3879 + ch = *p;
1.3880 + if (ch < 128) {
1.3881 + p++;
1.3882 + // quick check for ascii
1.3883 + if ((ch >= 'a' && ch <= 'z') ||
1.3884 + (ch >= 'A' && ch <= 'Z') ||
1.3885 + (ch == '_' || ch == '$') ||
1.3886 + (not_first_ch && ch >= '0' && ch <= '9')) {
1.3887 + last_is_slash = false;
1.3888 + continue;
1.3889 + }
1.3890 + if (slash_ok && ch == '/') {
1.3891 + if (last_is_slash) {
1.3892 + return NULL; // Don't permit consecutive slashes
1.3893 + }
1.3894 + last_is_slash = true;
1.3895 + continue;
1.3896 + }
1.3897 + } else {
1.3898 + jint unicode_ch;
1.3899 + char* tmp_p = UTF8::next_character(p, &unicode_ch);
1.3900 + p = tmp_p;
1.3901 + last_is_slash = false;
1.3902 + // Check if ch is Java identifier start or is Java identifier part
1.3903 + // 4672820: call java.lang.Character methods directly without generating separate tables.
1.3904 + EXCEPTION_MARK;
1.3905 + instanceKlassHandle klass (THREAD, SystemDictionary::char_klass());
1.3906 +
1.3907 + // return value
1.3908 + JavaValue result(T_BOOLEAN);
1.3909 + // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart
1.3910 + JavaCallArguments args;
1.3911 + args.push_int(unicode_ch);
1.3912 +
1.3913 + // public static boolean isJavaIdentifierStart(char ch);
1.3914 + JavaCalls::call_static(&result,
1.3915 + klass,
1.3916 + vmSymbolHandles::isJavaIdentifierStart_name(),
1.3917 + vmSymbolHandles::int_bool_signature(),
1.3918 + &args,
1.3919 + THREAD);
1.3920 +
1.3921 + if (HAS_PENDING_EXCEPTION) {
1.3922 + CLEAR_PENDING_EXCEPTION;
1.3923 + return 0;
1.3924 + }
1.3925 + if (result.get_jboolean()) {
1.3926 + continue;
1.3927 + }
1.3928 +
1.3929 + if (not_first_ch) {
1.3930 + // public static boolean isJavaIdentifierPart(char ch);
1.3931 + JavaCalls::call_static(&result,
1.3932 + klass,
1.3933 + vmSymbolHandles::isJavaIdentifierPart_name(),
1.3934 + vmSymbolHandles::int_bool_signature(),
1.3935 + &args,
1.3936 + THREAD);
1.3937 +
1.3938 + if (HAS_PENDING_EXCEPTION) {
1.3939 + CLEAR_PENDING_EXCEPTION;
1.3940 + return 0;
1.3941 + }
1.3942 +
1.3943 + if (result.get_jboolean()) {
1.3944 + continue;
1.3945 + }
1.3946 + }
1.3947 + }
1.3948 + return (not_first_ch) ? old_p : NULL;
1.3949 + }
1.3950 + return (not_first_ch) ? p : NULL;
1.3951 +}
1.3952 +
1.3953 +
1.3954 +// Take pointer to a string. Skip over the longest part of the string that could
1.3955 +// be taken as a field signature. Allow "void" if void_ok.
1.3956 +// Return a pointer to just past the signature.
1.3957 +// Return NULL if no legal signature is found.
1.3958 +char* ClassFileParser::skip_over_field_signature(char* signature,
1.3959 + bool void_ok,
1.3960 + unsigned int length,
1.3961 + TRAPS) {
1.3962 + unsigned int array_dim = 0;
1.3963 + while (length > 0) {
1.3964 + switch (signature[0]) {
1.3965 + case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; }
1.3966 + case JVM_SIGNATURE_BOOLEAN:
1.3967 + case JVM_SIGNATURE_BYTE:
1.3968 + case JVM_SIGNATURE_CHAR:
1.3969 + case JVM_SIGNATURE_SHORT:
1.3970 + case JVM_SIGNATURE_INT:
1.3971 + case JVM_SIGNATURE_FLOAT:
1.3972 + case JVM_SIGNATURE_LONG:
1.3973 + case JVM_SIGNATURE_DOUBLE:
1.3974 + return signature + 1;
1.3975 + case JVM_SIGNATURE_CLASS: {
1.3976 + if (_major_version < JAVA_1_5_VERSION) {
1.3977 + // Skip over the class name if one is there
1.3978 + char* p = skip_over_field_name(signature + 1, true, --length);
1.3979 +
1.3980 + // The next character better be a semicolon
1.3981 + if (p && (p - signature) > 1 && p[0] == ';') {
1.3982 + return p + 1;
1.3983 + }
1.3984 + } else {
1.3985 + // 4900761: For class version > 48, any unicode is allowed in class name.
1.3986 + length--;
1.3987 + signature++;
1.3988 + while (length > 0 && signature[0] != ';') {
1.3989 + if (signature[0] == '.') {
1.3990 + classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0);
1.3991 + }
1.3992 + length--;
1.3993 + signature++;
1.3994 + }
1.3995 + if (signature[0] == ';') { return signature + 1; }
1.3996 + }
1.3997 +
1.3998 + return NULL;
1.3999 + }
1.4000 + case JVM_SIGNATURE_ARRAY:
1.4001 + array_dim++;
1.4002 + if (array_dim > 255) {
1.4003 + // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions.
1.4004 + classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0);
1.4005 + }
1.4006 + // The rest of what's there better be a legal signature
1.4007 + signature++;
1.4008 + length--;
1.4009 + void_ok = false;
1.4010 + break;
1.4011 +
1.4012 + default:
1.4013 + return NULL;
1.4014 + }
1.4015 + }
1.4016 + return NULL;
1.4017 +}
