# HG changeset patch # User hseigel # Date 1414155407 14400 # Node ID 3ac720b8c72394efb70f4e3ec0cd33f019ac3766 # Parent ea143278766ce2978063965d3f6737bd8e73163e 8061962: classFileParser.cpp.orig got erroneously added to the hotspot source repository Summary: Remove the file Reviewed-by: coleenp, ccheung diff -r ea143278766c -r 3ac720b8c723 hotspot/src/share/vm/classfile/classFileParser.cpp.orig --- a/hotspot/src/share/vm/classfile/classFileParser.cpp.orig Thu Oct 23 14:43:08 2014 -0700 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,5274 +0,0 @@ -/* - * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * version 2 for more details (a copy is included in the LICENSE file that - * accompanied this code). - * - * You should have received a copy of the GNU General Public License version - * 2 along with this work; if not, write to the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - * - */ - -#include "precompiled.hpp" -#include "classfile/classFileParser.hpp" -#include "classfile/classLoader.hpp" -#include "classfile/classLoaderData.hpp" -#include "classfile/classLoaderData.inline.hpp" -#include "classfile/defaultMethods.hpp" -#include "classfile/javaClasses.hpp" -#include "classfile/symbolTable.hpp" -#include "classfile/systemDictionary.hpp" -#if INCLUDE_CDS -#include "classfile/systemDictionaryShared.hpp" -#endif -#include "classfile/verificationType.hpp" -#include "classfile/verifier.hpp" -#include "classfile/vmSymbols.hpp" -#include "memory/allocation.hpp" -#include "memory/gcLocker.hpp" -#include "memory/metadataFactory.hpp" -#include "memory/oopFactory.hpp" -#include "memory/referenceType.hpp" -#include "memory/universe.inline.hpp" -#include "oops/constantPool.hpp" -#include "oops/fieldStreams.hpp" -#include "oops/instanceKlass.hpp" -#include "oops/instanceMirrorKlass.hpp" -#include "oops/klass.inline.hpp" -#include "oops/klassVtable.hpp" -#include "oops/method.hpp" -#include "oops/symbol.hpp" -#include "prims/jvm.h" -#include "prims/jvmtiExport.hpp" -#include "prims/jvmtiThreadState.hpp" -#include "runtime/javaCalls.hpp" -#include "runtime/perfData.hpp" -#include "runtime/reflection.hpp" -#include "runtime/signature.hpp" -#include "runtime/timer.hpp" -#include "services/classLoadingService.hpp" -#include "services/threadService.hpp" -#include "utilities/array.hpp" -#include "utilities/globalDefinitions.hpp" -#include "utilities/ostream.hpp" - -// We generally try to create the oops directly when parsing, rather than -// allocating temporary data structures and copying the bytes twice. A -// temporary area is only needed when parsing utf8 entries in the constant -// pool and when parsing line number tables. - -// We add assert in debug mode when class format is not checked. - -#define JAVA_CLASSFILE_MAGIC 0xCAFEBABE -#define JAVA_MIN_SUPPORTED_VERSION 45 -#define JAVA_MAX_SUPPORTED_VERSION 52 -#define JAVA_MAX_SUPPORTED_MINOR_VERSION 0 - -// Used for two backward compatibility reasons: -// - to check for new additions to the class file format in JDK1.5 -// - to check for bug fixes in the format checker in JDK1.5 -#define JAVA_1_5_VERSION 49 - -// Used for backward compatibility reasons: -// - to check for javac bug fixes that happened after 1.5 -// - also used as the max version when running in jdk6 -#define JAVA_6_VERSION 50 - -// Used for backward compatibility reasons: -// - to check NameAndType_info signatures more aggressively -#define JAVA_7_VERSION 51 - -// Extension method support. -#define JAVA_8_VERSION 52 - -void ClassFileParser::parse_constant_pool_entries(int length, TRAPS) { - // Use a local copy of ClassFileStream. It helps the C++ compiler to optimize - // this function (_current can be allocated in a register, with scalar - // replacement of aggregates). The _current pointer is copied back to - // stream() when this function returns. DON'T call another method within - // this method that uses stream(). - ClassFileStream* cfs0 = stream(); - ClassFileStream cfs1 = *cfs0; - ClassFileStream* cfs = &cfs1; -#ifdef ASSERT - assert(cfs->allocated_on_stack(),"should be local"); - u1* old_current = cfs0->current(); -#endif - Handle class_loader(THREAD, _loader_data->class_loader()); - - // Used for batching symbol allocations. - const char* names[SymbolTable::symbol_alloc_batch_size]; - int lengths[SymbolTable::symbol_alloc_batch_size]; - int indices[SymbolTable::symbol_alloc_batch_size]; - unsigned int hashValues[SymbolTable::symbol_alloc_batch_size]; - int names_count = 0; - - // parsing Index 0 is unused - for (int index = 1; index < length; index++) { - // Each of the following case guarantees one more byte in the stream - // for the following tag or the access_flags following constant pool, - // so we don't need bounds-check for reading tag. - u1 tag = cfs->get_u1_fast(); - switch (tag) { - case JVM_CONSTANT_Class : - { - cfs->guarantee_more(3, CHECK); // name_index, tag/access_flags - u2 name_index = cfs->get_u2_fast(); - _cp->klass_index_at_put(index, name_index); - } - break; - case JVM_CONSTANT_Fieldref : - { - cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags - u2 class_index = cfs->get_u2_fast(); - u2 name_and_type_index = cfs->get_u2_fast(); - _cp->field_at_put(index, class_index, name_and_type_index); - } - break; - case JVM_CONSTANT_Methodref : - { - cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags - u2 class_index = cfs->get_u2_fast(); - u2 name_and_type_index = cfs->get_u2_fast(); - _cp->method_at_put(index, class_index, name_and_type_index); - } - break; - case JVM_CONSTANT_InterfaceMethodref : - { - cfs->guarantee_more(5, CHECK); // class_index, name_and_type_index, tag/access_flags - u2 class_index = cfs->get_u2_fast(); - u2 name_and_type_index = cfs->get_u2_fast(); - _cp->interface_method_at_put(index, class_index, name_and_type_index); - } - break; - case JVM_CONSTANT_String : - { - cfs->guarantee_more(3, CHECK); // string_index, tag/access_flags - u2 string_index = cfs->get_u2_fast(); - _cp->string_index_at_put(index, string_index); - } - break; - case JVM_CONSTANT_MethodHandle : - case JVM_CONSTANT_MethodType : - if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { - classfile_parse_error( - "Class file version does not support constant tag %u in class file %s", - tag, CHECK); - } - if (tag == JVM_CONSTANT_MethodHandle) { - cfs->guarantee_more(4, CHECK); // ref_kind, method_index, tag/access_flags - u1 ref_kind = cfs->get_u1_fast(); - u2 method_index = cfs->get_u2_fast(); - _cp->method_handle_index_at_put(index, ref_kind, method_index); - } else if (tag == JVM_CONSTANT_MethodType) { - cfs->guarantee_more(3, CHECK); // signature_index, tag/access_flags - u2 signature_index = cfs->get_u2_fast(); - _cp->method_type_index_at_put(index, signature_index); - } else { - ShouldNotReachHere(); - } - break; - case JVM_CONSTANT_InvokeDynamic : - { - if (_major_version < Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { - classfile_parse_error( - "Class file version does not support constant tag %u in class file %s", - tag, CHECK); - } - cfs->guarantee_more(5, CHECK); // bsm_index, nt, tag/access_flags - u2 bootstrap_specifier_index = cfs->get_u2_fast(); - u2 name_and_type_index = cfs->get_u2_fast(); - if (_max_bootstrap_specifier_index < (int) bootstrap_specifier_index) - _max_bootstrap_specifier_index = (int) bootstrap_specifier_index; // collect for later - _cp->invoke_dynamic_at_put(index, bootstrap_specifier_index, name_and_type_index); - } - break; - case JVM_CONSTANT_Integer : - { - cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags - u4 bytes = cfs->get_u4_fast(); - _cp->int_at_put(index, (jint) bytes); - } - break; - case JVM_CONSTANT_Float : - { - cfs->guarantee_more(5, CHECK); // bytes, tag/access_flags - u4 bytes = cfs->get_u4_fast(); - _cp->float_at_put(index, *(jfloat*)&bytes); - } - break; - case JVM_CONSTANT_Long : - // A mangled type might cause you to overrun allocated memory - guarantee_property(index+1 < length, - "Invalid constant pool entry %u in class file %s", - index, CHECK); - { - cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags - u8 bytes = cfs->get_u8_fast(); - _cp->long_at_put(index, bytes); - } - index++; // Skip entry following eigth-byte constant, see JVM book p. 98 - break; - case JVM_CONSTANT_Double : - // A mangled type might cause you to overrun allocated memory - guarantee_property(index+1 < length, - "Invalid constant pool entry %u in class file %s", - index, CHECK); - { - cfs->guarantee_more(9, CHECK); // bytes, tag/access_flags - u8 bytes = cfs->get_u8_fast(); - _cp->double_at_put(index, *(jdouble*)&bytes); - } - index++; // Skip entry following eigth-byte constant, see JVM book p. 98 - break; - case JVM_CONSTANT_NameAndType : - { - cfs->guarantee_more(5, CHECK); // name_index, signature_index, tag/access_flags - u2 name_index = cfs->get_u2_fast(); - u2 signature_index = cfs->get_u2_fast(); - _cp->name_and_type_at_put(index, name_index, signature_index); - } - break; - case JVM_CONSTANT_Utf8 : - { - cfs->guarantee_more(2, CHECK); // utf8_length - u2 utf8_length = cfs->get_u2_fast(); - u1* utf8_buffer = cfs->get_u1_buffer(); - assert(utf8_buffer != NULL, "null utf8 buffer"); - // Got utf8 string, guarantee utf8_length+1 bytes, set stream position forward. - cfs->guarantee_more(utf8_length+1, CHECK); // utf8 string, tag/access_flags - cfs->skip_u1_fast(utf8_length); - - // Before storing the symbol, make sure it's legal - if (_need_verify) { - verify_legal_utf8((unsigned char*)utf8_buffer, utf8_length, CHECK); - } - - if (has_cp_patch_at(index)) { - Handle patch = clear_cp_patch_at(index); - guarantee_property(java_lang_String::is_instance(patch()), - "Illegal utf8 patch at %d in class file %s", - index, CHECK); - char* str = java_lang_String::as_utf8_string(patch()); - // (could use java_lang_String::as_symbol instead, but might as well batch them) - utf8_buffer = (u1*) str; - utf8_length = (int) strlen(str); - } - - unsigned int hash; - Symbol* result = SymbolTable::lookup_only((char*)utf8_buffer, utf8_length, hash); - if (result == NULL) { - names[names_count] = (char*)utf8_buffer; - lengths[names_count] = utf8_length; - indices[names_count] = index; - hashValues[names_count++] = hash; - if (names_count == SymbolTable::symbol_alloc_batch_size) { - SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK); - names_count = 0; - } - } else { - _cp->symbol_at_put(index, result); - } - } - break; - default: - classfile_parse_error( - "Unknown constant tag %u in class file %s", tag, CHECK); - break; - } - } - - // Allocate the remaining symbols - if (names_count > 0) { - SymbolTable::new_symbols(_loader_data, _cp, names_count, names, lengths, indices, hashValues, CHECK); - } - - // Copy _current pointer of local copy back to stream(). -#ifdef ASSERT - assert(cfs0->current() == old_current, "non-exclusive use of stream()"); -#endif - cfs0->set_current(cfs1.current()); -} - -bool inline valid_cp_range(int index, int length) { return (index > 0 && index < length); } - -inline Symbol* check_symbol_at(constantPoolHandle cp, int index) { - if (valid_cp_range(index, cp->length()) && cp->tag_at(index).is_utf8()) - return cp->symbol_at(index); - else - return NULL; -} - -constantPoolHandle ClassFileParser::parse_constant_pool(TRAPS) { - ClassFileStream* cfs = stream(); - constantPoolHandle nullHandle; - - cfs->guarantee_more(3, CHECK_(nullHandle)); // length, first cp tag - u2 length = cfs->get_u2_fast(); - guarantee_property( - length >= 1, "Illegal constant pool size %u in class file %s", - length, CHECK_(nullHandle)); - ConstantPool* constant_pool = ConstantPool::allocate(_loader_data, length, - CHECK_(nullHandle)); - _cp = constant_pool; // save in case of errors - constantPoolHandle cp (THREAD, constant_pool); - - // parsing constant pool entries - parse_constant_pool_entries(length, CHECK_(nullHandle)); - - int index = 1; // declared outside of loops for portability - - // first verification pass - validate cross references and fixup class and string constants - for (index = 1; index < length; index++) { // Index 0 is unused - jbyte tag = cp->tag_at(index).value(); - switch (tag) { - case JVM_CONSTANT_Class : - ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present - break; - case JVM_CONSTANT_Fieldref : - // fall through - case JVM_CONSTANT_Methodref : - // fall through - case JVM_CONSTANT_InterfaceMethodref : { - if (!_need_verify) break; - int klass_ref_index = cp->klass_ref_index_at(index); - int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); - check_property(valid_klass_reference_at(klass_ref_index), - "Invalid constant pool index %u in class file %s", - klass_ref_index, - CHECK_(nullHandle)); - check_property(valid_cp_range(name_and_type_ref_index, length) && - cp->tag_at(name_and_type_ref_index).is_name_and_type(), - "Invalid constant pool index %u in class file %s", - name_and_type_ref_index, - CHECK_(nullHandle)); - break; - } - case JVM_CONSTANT_String : - ShouldNotReachHere(); // Only JVM_CONSTANT_StringIndex should be present - break; - case JVM_CONSTANT_Integer : - break; - case JVM_CONSTANT_Float : - break; - case JVM_CONSTANT_Long : - case JVM_CONSTANT_Double : - index++; - check_property( - (index < length && cp->tag_at(index).is_invalid()), - "Improper constant pool long/double index %u in class file %s", - index, CHECK_(nullHandle)); - break; - case JVM_CONSTANT_NameAndType : { - if (!_need_verify) break; - int name_ref_index = cp->name_ref_index_at(index); - int signature_ref_index = cp->signature_ref_index_at(index); - check_property(valid_symbol_at(name_ref_index), - "Invalid constant pool index %u in class file %s", - name_ref_index, CHECK_(nullHandle)); - check_property(valid_symbol_at(signature_ref_index), - "Invalid constant pool index %u in class file %s", - signature_ref_index, CHECK_(nullHandle)); - break; - } - case JVM_CONSTANT_Utf8 : - break; - case JVM_CONSTANT_UnresolvedClass : // fall-through - case JVM_CONSTANT_UnresolvedClassInError: - ShouldNotReachHere(); // Only JVM_CONSTANT_ClassIndex should be present - break; - case JVM_CONSTANT_ClassIndex : - { - int class_index = cp->klass_index_at(index); - check_property(valid_symbol_at(class_index), - "Invalid constant pool index %u in class file %s", - class_index, CHECK_(nullHandle)); - cp->unresolved_klass_at_put(index, cp->symbol_at(class_index)); - } - break; - case JVM_CONSTANT_StringIndex : - { - int string_index = cp->string_index_at(index); - check_property(valid_symbol_at(string_index), - "Invalid constant pool index %u in class file %s", - string_index, CHECK_(nullHandle)); - Symbol* sym = cp->symbol_at(string_index); - cp->unresolved_string_at_put(index, sym); - } - break; - case JVM_CONSTANT_MethodHandle : - { - int ref_index = cp->method_handle_index_at(index); - check_property( - valid_cp_range(ref_index, length), - "Invalid constant pool index %u in class file %s", - ref_index, CHECK_(nullHandle)); - constantTag tag = cp->tag_at(ref_index); - int ref_kind = cp->method_handle_ref_kind_at(index); - switch (ref_kind) { - case JVM_REF_getField: - case JVM_REF_getStatic: - case JVM_REF_putField: - case JVM_REF_putStatic: - check_property( - tag.is_field(), - "Invalid constant pool index %u in class file %s (not a field)", - ref_index, CHECK_(nullHandle)); - break; - case JVM_REF_invokeVirtual: - case JVM_REF_newInvokeSpecial: - check_property( - tag.is_method(), - "Invalid constant pool index %u in class file %s (not a method)", - ref_index, CHECK_(nullHandle)); - break; - case JVM_REF_invokeStatic: - case JVM_REF_invokeSpecial: - check_property(tag.is_method() || - ((_major_version >= JAVA_8_VERSION) && tag.is_interface_method()), - "Invalid constant pool index %u in class file %s (not a method)", - ref_index, CHECK_(nullHandle)); - break; - case JVM_REF_invokeInterface: - check_property( - tag.is_interface_method(), - "Invalid constant pool index %u in class file %s (not an interface method)", - ref_index, CHECK_(nullHandle)); - break; - default: - classfile_parse_error( - "Bad method handle kind at constant pool index %u in class file %s", - index, CHECK_(nullHandle)); - } - // Keep the ref_index unchanged. It will be indirected at link-time. - } - break; - case JVM_CONSTANT_MethodType : - { - int ref_index = cp->method_type_index_at(index); - check_property(valid_symbol_at(ref_index), - "Invalid constant pool index %u in class file %s", - ref_index, CHECK_(nullHandle)); - } - break; - case JVM_CONSTANT_InvokeDynamic : - { - int name_and_type_ref_index = cp->invoke_dynamic_name_and_type_ref_index_at(index); - check_property(valid_cp_range(name_and_type_ref_index, length) && - cp->tag_at(name_and_type_ref_index).is_name_and_type(), - "Invalid constant pool index %u in class file %s", - name_and_type_ref_index, - CHECK_(nullHandle)); - // bootstrap specifier index must be checked later, when BootstrapMethods attr is available - break; - } - default: - fatal(err_msg("bad constant pool tag value %u", - cp->tag_at(index).value())); - ShouldNotReachHere(); - break; - } // end of switch - } // end of for - - if (_cp_patches != NULL) { - // need to treat this_class specially... - int this_class_index; - { - cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len - u1* mark = cfs->current(); - u2 flags = cfs->get_u2_fast(); - this_class_index = cfs->get_u2_fast(); - cfs->set_current(mark); // revert to mark - } - - for (index = 1; index < length; index++) { // Index 0 is unused - if (has_cp_patch_at(index)) { - guarantee_property(index != this_class_index, - "Illegal constant pool patch to self at %d in class file %s", - index, CHECK_(nullHandle)); - patch_constant_pool(cp, index, cp_patch_at(index), CHECK_(nullHandle)); - } - } - } - - if (!_need_verify) { - return cp; - } - - // second verification pass - checks the strings are of the right format. - // but not yet to the other entries - for (index = 1; index < length; index++) { - jbyte tag = cp->tag_at(index).value(); - switch (tag) { - case JVM_CONSTANT_UnresolvedClass: { - Symbol* class_name = cp->klass_name_at(index); - // check the name, even if _cp_patches will overwrite it - verify_legal_class_name(class_name, CHECK_(nullHandle)); - break; - } - case JVM_CONSTANT_NameAndType: { - if (_need_verify && _major_version >= JAVA_7_VERSION) { - int sig_index = cp->signature_ref_index_at(index); - int name_index = cp->name_ref_index_at(index); - Symbol* name = cp->symbol_at(name_index); - Symbol* sig = cp->symbol_at(sig_index); - if (sig->byte_at(0) == JVM_SIGNATURE_FUNC) { - verify_legal_method_signature(name, sig, CHECK_(nullHandle)); - } else { - verify_legal_field_signature(name, sig, CHECK_(nullHandle)); - } - } - break; - } - case JVM_CONSTANT_InvokeDynamic: - case JVM_CONSTANT_Fieldref: - case JVM_CONSTANT_Methodref: - case JVM_CONSTANT_InterfaceMethodref: { - int name_and_type_ref_index = cp->name_and_type_ref_index_at(index); - // already verified to be utf8 - int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); - // already verified to be utf8 - int signature_ref_index = cp->signature_ref_index_at(name_and_type_ref_index); - Symbol* name = cp->symbol_at(name_ref_index); - Symbol* signature = cp->symbol_at(signature_ref_index); - if (tag == JVM_CONSTANT_Fieldref) { - verify_legal_field_name(name, CHECK_(nullHandle)); - if (_need_verify && _major_version >= JAVA_7_VERSION) { - // Signature is verified above, when iterating NameAndType_info. - // Need only to be sure it's the right type. - if (signature->byte_at(0) == JVM_SIGNATURE_FUNC) { - throwIllegalSignature( - "Field", name, signature, CHECK_(nullHandle)); - } - } else { - verify_legal_field_signature(name, signature, CHECK_(nullHandle)); - } - } else { - verify_legal_method_name(name, CHECK_(nullHandle)); - if (_need_verify && _major_version >= JAVA_7_VERSION) { - // Signature is verified above, when iterating NameAndType_info. - // Need only to be sure it's the right type. - if (signature->byte_at(0) != JVM_SIGNATURE_FUNC) { - throwIllegalSignature( - "Method", name, signature, CHECK_(nullHandle)); - } - } else { - verify_legal_method_signature(name, signature, CHECK_(nullHandle)); - } - if (tag == JVM_CONSTANT_Methodref) { - // 4509014: If a class method name begins with '<', it must be "". - assert(name != NULL, "method name in constant pool is null"); - unsigned int name_len = name->utf8_length(); - assert(name_len > 0, "bad method name"); // already verified as legal name - if (name->byte_at(0) == '<') { - if (name != vmSymbols::object_initializer_name()) { - classfile_parse_error( - "Bad method name at constant pool index %u in class file %s", - name_ref_index, CHECK_(nullHandle)); - } - } - } - } - break; - } - case JVM_CONSTANT_MethodHandle: { - int ref_index = cp->method_handle_index_at(index); - int ref_kind = cp->method_handle_ref_kind_at(index); - switch (ref_kind) { - case JVM_REF_invokeVirtual: - case JVM_REF_invokeStatic: - case JVM_REF_invokeSpecial: - case JVM_REF_newInvokeSpecial: - { - int name_and_type_ref_index = cp->name_and_type_ref_index_at(ref_index); - int name_ref_index = cp->name_ref_index_at(name_and_type_ref_index); - Symbol* name = cp->symbol_at(name_ref_index); - if (ref_kind == JVM_REF_newInvokeSpecial) { - if (name != vmSymbols::object_initializer_name()) { - classfile_parse_error( - "Bad constructor name at constant pool index %u in class file %s", - name_ref_index, CHECK_(nullHandle)); - } - } else { - if (name == vmSymbols::object_initializer_name()) { - classfile_parse_error( - "Bad method name at constant pool index %u in class file %s", - name_ref_index, CHECK_(nullHandle)); - } - } - } - break; - // Other ref_kinds are already fully checked in previous pass. - } - break; - } - case JVM_CONSTANT_MethodType: { - Symbol* no_name = vmSymbols::type_name(); // place holder - Symbol* signature = cp->method_type_signature_at(index); - verify_legal_method_signature(no_name, signature, CHECK_(nullHandle)); - break; - } - case JVM_CONSTANT_Utf8: { - assert(cp->symbol_at(index)->refcount() != 0, "count corrupted"); - } - } // end of switch - } // end of for - - return cp; -} - - -void ClassFileParser::patch_constant_pool(constantPoolHandle cp, int index, Handle patch, TRAPS) { - BasicType patch_type = T_VOID; - - switch (cp->tag_at(index).value()) { - - case JVM_CONSTANT_UnresolvedClass : - // Patching a class means pre-resolving it. - // The name in the constant pool is ignored. - if (java_lang_Class::is_instance(patch())) { - guarantee_property(!java_lang_Class::is_primitive(patch()), - "Illegal class patch at %d in class file %s", - index, CHECK); - cp->klass_at_put(index, java_lang_Class::as_Klass(patch())); - } else { - guarantee_property(java_lang_String::is_instance(patch()), - "Illegal class patch at %d in class file %s", - index, CHECK); - Symbol* name = java_lang_String::as_symbol(patch(), CHECK); - cp->unresolved_klass_at_put(index, name); - } - break; - - case JVM_CONSTANT_String : - // skip this patch and don't clear it. Needs the oop array for resolved - // references to be created first. - return; - - case JVM_CONSTANT_Integer : patch_type = T_INT; goto patch_prim; - case JVM_CONSTANT_Float : patch_type = T_FLOAT; goto patch_prim; - case JVM_CONSTANT_Long : patch_type = T_LONG; goto patch_prim; - case JVM_CONSTANT_Double : patch_type = T_DOUBLE; goto patch_prim; - patch_prim: - { - jvalue value; - BasicType value_type = java_lang_boxing_object::get_value(patch(), &value); - guarantee_property(value_type == patch_type, - "Illegal primitive patch at %d in class file %s", - index, CHECK); - switch (value_type) { - case T_INT: cp->int_at_put(index, value.i); break; - case T_FLOAT: cp->float_at_put(index, value.f); break; - case T_LONG: cp->long_at_put(index, value.j); break; - case T_DOUBLE: cp->double_at_put(index, value.d); break; - default: assert(false, ""); - } - } - break; - - default: - // %%% TODO: put method handles into CONSTANT_InterfaceMethodref, etc. - guarantee_property(!has_cp_patch_at(index), - "Illegal unexpected patch at %d in class file %s", - index, CHECK); - return; - } - - // On fall-through, mark the patch as used. - clear_cp_patch_at(index); -} - - - -class NameSigHash: public ResourceObj { - public: - Symbol* _name; // name - Symbol* _sig; // signature - NameSigHash* _next; // Next entry in hash table -}; - - -#define HASH_ROW_SIZE 256 - -unsigned int hash(Symbol* name, Symbol* sig) { - unsigned int raw_hash = 0; - raw_hash += ((unsigned int)(uintptr_t)name) >> (LogHeapWordSize + 2); - raw_hash += ((unsigned int)(uintptr_t)sig) >> LogHeapWordSize; - - return (raw_hash + (unsigned int)(uintptr_t)name) % HASH_ROW_SIZE; -} - - -void initialize_hashtable(NameSigHash** table) { - memset((void*)table, 0, sizeof(NameSigHash*) * HASH_ROW_SIZE); -} - -// Return false if the name/sig combination is found in table. -// Return true if no duplicate is found. And name/sig is added as a new entry in table. -// The old format checker uses heap sort to find duplicates. -// NOTE: caller should guarantee that GC doesn't happen during the life cycle -// of table since we don't expect Symbol*'s to move. -bool put_after_lookup(Symbol* name, Symbol* sig, NameSigHash** table) { - assert(name != NULL, "name in constant pool is NULL"); - - // First lookup for duplicates - int index = hash(name, sig); - NameSigHash* entry = table[index]; - while (entry != NULL) { - if (entry->_name == name && entry->_sig == sig) { - return false; - } - entry = entry->_next; - } - - // No duplicate is found, allocate a new entry and fill it. - entry = new NameSigHash(); - entry->_name = name; - entry->_sig = sig; - - // Insert into hash table - entry->_next = table[index]; - table[index] = entry; - - return true; -} - - -Array* ClassFileParser::parse_interfaces(int length, - Handle protection_domain, - Symbol* class_name, - bool* has_default_methods, - TRAPS) { - if (length == 0) { - _local_interfaces = Universe::the_empty_klass_array(); - } else { - ClassFileStream* cfs = stream(); - assert(length > 0, "only called for length>0"); - _local_interfaces = MetadataFactory::new_array(_loader_data, length, NULL, CHECK_NULL); - - int index; - for (index = 0; index < length; index++) { - u2 interface_index = cfs->get_u2(CHECK_NULL); - KlassHandle interf; - check_property( - valid_klass_reference_at(interface_index), - "Interface name has bad constant pool index %u in class file %s", - interface_index, CHECK_NULL); - if (_cp->tag_at(interface_index).is_klass()) { - interf = KlassHandle(THREAD, _cp->resolved_klass_at(interface_index)); - } else { - Symbol* unresolved_klass = _cp->klass_name_at(interface_index); - - // Don't need to check legal name because it's checked when parsing constant pool. - // But need to make sure it's not an array type. - guarantee_property(unresolved_klass->byte_at(0) != JVM_SIGNATURE_ARRAY, - "Bad interface name in class file %s", CHECK_NULL); - Handle class_loader(THREAD, _loader_data->class_loader()); - - // Call resolve_super so classcircularity is checked - Klass* k = SystemDictionary::resolve_super_or_fail(class_name, - unresolved_klass, class_loader, protection_domain, - false, CHECK_NULL); - interf = KlassHandle(THREAD, k); - } - - if (!interf()->is_interface()) { - THROW_MSG_(vmSymbols::java_lang_IncompatibleClassChangeError(), "Implementing class", NULL); - } - if (InstanceKlass::cast(interf())->has_default_methods()) { - *has_default_methods = true; - } - _local_interfaces->at_put(index, interf()); - } - - if (!_need_verify || length <= 1) { - return _local_interfaces; - } - - // Check if there's any duplicates in interfaces - ResourceMark rm(THREAD); - NameSigHash** interface_names = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, NameSigHash*, HASH_ROW_SIZE); - initialize_hashtable(interface_names); - bool dup = false; - { - debug_only(No_Safepoint_Verifier nsv;) - for (index = 0; index < length; index++) { - Klass* k = _local_interfaces->at(index); - Symbol* name = InstanceKlass::cast(k)->name(); - // If no duplicates, add (name, NULL) in hashtable interface_names. - if (!put_after_lookup(name, NULL, interface_names)) { - dup = true; - break; - } - } - } - if (dup) { - classfile_parse_error("Duplicate interface name in class file %s", CHECK_NULL); - } - } - return _local_interfaces; -} - - -void ClassFileParser::verify_constantvalue(int constantvalue_index, int signature_index, TRAPS) { - // Make sure the constant pool entry is of a type appropriate to this field - guarantee_property( - (constantvalue_index > 0 && - constantvalue_index < _cp->length()), - "Bad initial value index %u in ConstantValue attribute in class file %s", - constantvalue_index, CHECK); - constantTag value_type = _cp->tag_at(constantvalue_index); - switch ( _cp->basic_type_for_signature_at(signature_index) ) { - case T_LONG: - guarantee_property(value_type.is_long(), "Inconsistent constant value type in class file %s", CHECK); - break; - case T_FLOAT: - guarantee_property(value_type.is_float(), "Inconsistent constant value type in class file %s", CHECK); - break; - case T_DOUBLE: - guarantee_property(value_type.is_double(), "Inconsistent constant value type in class file %s", CHECK); - break; - case T_BYTE: case T_CHAR: case T_SHORT: case T_BOOLEAN: case T_INT: - guarantee_property(value_type.is_int(), "Inconsistent constant value type in class file %s", CHECK); - break; - case T_OBJECT: - guarantee_property((_cp->symbol_at(signature_index)->equals("Ljava/lang/String;") - && value_type.is_string()), - "Bad string initial value in class file %s", CHECK); - break; - default: - classfile_parse_error( - "Unable to set initial value %u in class file %s", - constantvalue_index, CHECK); - } -} - - -// Parse attributes for a field. -void ClassFileParser::parse_field_attributes(u2 attributes_count, - bool is_static, u2 signature_index, - u2* constantvalue_index_addr, - bool* is_synthetic_addr, - u2* generic_signature_index_addr, - ClassFileParser::FieldAnnotationCollector* parsed_annotations, - TRAPS) { - ClassFileStream* cfs = stream(); - assert(attributes_count > 0, "length should be greater than 0"); - u2 constantvalue_index = 0; - u2 generic_signature_index = 0; - bool is_synthetic = false; - u1* runtime_visible_annotations = NULL; - int runtime_visible_annotations_length = 0; - u1* runtime_invisible_annotations = NULL; - int runtime_invisible_annotations_length = 0; - u1* runtime_visible_type_annotations = NULL; - int runtime_visible_type_annotations_length = 0; - u1* runtime_invisible_type_annotations = NULL; - int runtime_invisible_type_annotations_length = 0; - bool runtime_invisible_annotations_exists = false; - bool runtime_invisible_type_annotations_exists = false; - while (attributes_count--) { - cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length - u2 attribute_name_index = cfs->get_u2_fast(); - u4 attribute_length = cfs->get_u4_fast(); - check_property(valid_symbol_at(attribute_name_index), - "Invalid field attribute index %u in class file %s", - attribute_name_index, - CHECK); - Symbol* attribute_name = _cp->symbol_at(attribute_name_index); - if (is_static && attribute_name == vmSymbols::tag_constant_value()) { - // ignore if non-static - if (constantvalue_index != 0) { - classfile_parse_error("Duplicate ConstantValue attribute in class file %s", CHECK); - } - check_property( - attribute_length == 2, - "Invalid ConstantValue field attribute length %u in class file %s", - attribute_length, CHECK); - constantvalue_index = cfs->get_u2(CHECK); - if (_need_verify) { - verify_constantvalue(constantvalue_index, signature_index, CHECK); - } - } else if (attribute_name == vmSymbols::tag_synthetic()) { - if (attribute_length != 0) { - classfile_parse_error( - "Invalid Synthetic field attribute length %u in class file %s", - attribute_length, CHECK); - } - is_synthetic = true; - } else if (attribute_name == vmSymbols::tag_deprecated()) { // 4276120 - if (attribute_length != 0) { - classfile_parse_error( - "Invalid Deprecated field attribute length %u in class file %s", - attribute_length, CHECK); - } - } else if (_major_version >= JAVA_1_5_VERSION) { - if (attribute_name == vmSymbols::tag_signature()) { - if (attribute_length != 2) { - classfile_parse_error( - "Wrong size %u for field's Signature attribute in class file %s", - attribute_length, CHECK); - } - generic_signature_index = parse_generic_signature_attribute(CHECK); - } else if (attribute_name == vmSymbols::tag_runtime_visible_annotations()) { - if (runtime_visible_annotations != NULL) { - classfile_parse_error( - "Multiple RuntimeVisibleAnnotations attributes for field in class file %s", CHECK); - } - runtime_visible_annotations_length = attribute_length; - runtime_visible_annotations = cfs->get_u1_buffer(); - assert(runtime_visible_annotations != NULL, "null visible annotations"); - parse_annotations(runtime_visible_annotations, - runtime_visible_annotations_length, - parsed_annotations, - CHECK); - cfs->skip_u1(runtime_visible_annotations_length, CHECK); - } else if (attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { - if (runtime_invisible_annotations_exists) { - classfile_parse_error( - "Multiple RuntimeInvisibleAnnotations attributes for field in class file %s", CHECK); - } - runtime_invisible_annotations_exists = true; - if (PreserveAllAnnotations) { - runtime_invisible_annotations_length = attribute_length; - runtime_invisible_annotations = cfs->get_u1_buffer(); - assert(runtime_invisible_annotations != NULL, "null invisible annotations"); - } - cfs->skip_u1(attribute_length, CHECK); - } else if (attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { - if (runtime_visible_type_annotations != NULL) { - classfile_parse_error( - "Multiple RuntimeVisibleTypeAnnotations attributes for field in class file %s", CHECK); - } - runtime_visible_type_annotations_length = attribute_length; - runtime_visible_type_annotations = cfs->get_u1_buffer(); - assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); - cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); - } else if (attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { - if (runtime_invisible_type_annotations_exists) { - classfile_parse_error( - "Multiple RuntimeInvisibleTypeAnnotations attributes for field in class file %s", CHECK); - } else { - runtime_invisible_type_annotations_exists = true; - } - if (PreserveAllAnnotations) { - runtime_invisible_type_annotations_length = attribute_length; - runtime_invisible_type_annotations = cfs->get_u1_buffer(); - assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); - } - cfs->skip_u1(attribute_length, CHECK); - } else { - cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes - } - } else { - cfs->skip_u1(attribute_length, CHECK); // Skip unknown attributes - } - } - - *constantvalue_index_addr = constantvalue_index; - *is_synthetic_addr = is_synthetic; - *generic_signature_index_addr = generic_signature_index; - AnnotationArray* a = assemble_annotations(runtime_visible_annotations, - runtime_visible_annotations_length, - runtime_invisible_annotations, - runtime_invisible_annotations_length, - CHECK); - parsed_annotations->set_field_annotations(a); - a = assemble_annotations(runtime_visible_type_annotations, - runtime_visible_type_annotations_length, - runtime_invisible_type_annotations, - runtime_invisible_type_annotations_length, - CHECK); - parsed_annotations->set_field_type_annotations(a); - return; -} - - -// Field allocation types. Used for computing field offsets. - -enum FieldAllocationType { - STATIC_OOP, // Oops - STATIC_BYTE, // Boolean, Byte, char - STATIC_SHORT, // shorts - STATIC_WORD, // ints - STATIC_DOUBLE, // aligned long or double - NONSTATIC_OOP, - NONSTATIC_BYTE, - NONSTATIC_SHORT, - NONSTATIC_WORD, - NONSTATIC_DOUBLE, - MAX_FIELD_ALLOCATION_TYPE, - BAD_ALLOCATION_TYPE = -1 -}; - -static FieldAllocationType _basic_type_to_atype[2 * (T_CONFLICT + 1)] = { - BAD_ALLOCATION_TYPE, // 0 - BAD_ALLOCATION_TYPE, // 1 - BAD_ALLOCATION_TYPE, // 2 - BAD_ALLOCATION_TYPE, // 3 - NONSTATIC_BYTE , // T_BOOLEAN = 4, - NONSTATIC_SHORT, // T_CHAR = 5, - NONSTATIC_WORD, // T_FLOAT = 6, - NONSTATIC_DOUBLE, // T_DOUBLE = 7, - NONSTATIC_BYTE, // T_BYTE = 8, - NONSTATIC_SHORT, // T_SHORT = 9, - NONSTATIC_WORD, // T_INT = 10, - NONSTATIC_DOUBLE, // T_LONG = 11, - NONSTATIC_OOP, // T_OBJECT = 12, - NONSTATIC_OOP, // T_ARRAY = 13, - BAD_ALLOCATION_TYPE, // T_VOID = 14, - BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, - BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, - BAD_ALLOCATION_TYPE, // T_METADATA = 17, - BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, - BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, - BAD_ALLOCATION_TYPE, // 0 - BAD_ALLOCATION_TYPE, // 1 - BAD_ALLOCATION_TYPE, // 2 - BAD_ALLOCATION_TYPE, // 3 - STATIC_BYTE , // T_BOOLEAN = 4, - STATIC_SHORT, // T_CHAR = 5, - STATIC_WORD, // T_FLOAT = 6, - STATIC_DOUBLE, // T_DOUBLE = 7, - STATIC_BYTE, // T_BYTE = 8, - STATIC_SHORT, // T_SHORT = 9, - STATIC_WORD, // T_INT = 10, - STATIC_DOUBLE, // T_LONG = 11, - STATIC_OOP, // T_OBJECT = 12, - STATIC_OOP, // T_ARRAY = 13, - BAD_ALLOCATION_TYPE, // T_VOID = 14, - BAD_ALLOCATION_TYPE, // T_ADDRESS = 15, - BAD_ALLOCATION_TYPE, // T_NARROWOOP = 16, - BAD_ALLOCATION_TYPE, // T_METADATA = 17, - BAD_ALLOCATION_TYPE, // T_NARROWKLASS = 18, - BAD_ALLOCATION_TYPE, // T_CONFLICT = 19, -}; - -static FieldAllocationType basic_type_to_atype(bool is_static, BasicType type) { - assert(type >= T_BOOLEAN && type < T_VOID, "only allowable values"); - FieldAllocationType result = _basic_type_to_atype[type + (is_static ? (T_CONFLICT + 1) : 0)]; - assert(result != BAD_ALLOCATION_TYPE, "bad type"); - return result; -} - -class FieldAllocationCount: public ResourceObj { - public: - u2 count[MAX_FIELD_ALLOCATION_TYPE]; - - FieldAllocationCount() { - for (int i = 0; i < MAX_FIELD_ALLOCATION_TYPE; i++) { - count[i] = 0; - } - } - - FieldAllocationType update(bool is_static, BasicType type) { - FieldAllocationType atype = basic_type_to_atype(is_static, type); - // Make sure there is no overflow with injected fields. - assert(count[atype] < 0xFFFF, "More than 65535 fields"); - count[atype]++; - return atype; - } -}; - -Array* ClassFileParser::parse_fields(Symbol* class_name, - bool is_interface, - FieldAllocationCount *fac, - u2* java_fields_count_ptr, TRAPS) { - ClassFileStream* cfs = stream(); - cfs->guarantee_more(2, CHECK_NULL); // length - u2 length = cfs->get_u2_fast(); - *java_fields_count_ptr = length; - - int num_injected = 0; - InjectedField* injected = JavaClasses::get_injected(class_name, &num_injected); - int total_fields = length + num_injected; - - // The field array starts with tuples of shorts - // [access, name index, sig index, initial value index, byte offset]. - // A generic signature slot only exists for field with generic - // signature attribute. And the access flag is set with - // JVM_ACC_FIELD_HAS_GENERIC_SIGNATURE for that field. The generic - // signature slots are at the end of the field array and after all - // other fields data. - // - // f1: [access, name index, sig index, initial value index, low_offset, high_offset] - // f2: [access, name index, sig index, initial value index, low_offset, high_offset] - // ... - // fn: [access, name index, sig index, initial value index, low_offset, high_offset] - // [generic signature index] - // [generic signature index] - // ... - // - // Allocate a temporary resource array for field data. For each field, - // a slot is reserved in the temporary array for the generic signature - // index. After parsing all fields, the data are copied to a permanent - // array and any unused slots will be discarded. - ResourceMark rm(THREAD); - u2* fa = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2, total_fields * (FieldInfo::field_slots + 1)); - - // The generic signature slots start after all other fields' data. - int generic_signature_slot = total_fields * FieldInfo::field_slots; - int num_generic_signature = 0; - for (int n = 0; n < length; n++) { - cfs->guarantee_more(8, CHECK_NULL); // access_flags, name_index, descriptor_index, attributes_count - - AccessFlags access_flags; - jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_FIELD_MODIFIERS; - verify_legal_field_modifiers(flags, is_interface, CHECK_NULL); - access_flags.set_flags(flags); - - u2 name_index = cfs->get_u2_fast(); - int cp_size = _cp->length(); - check_property(valid_symbol_at(name_index), - "Invalid constant pool index %u for field name in class file %s", - name_index, - CHECK_NULL); - Symbol* name = _cp->symbol_at(name_index); - verify_legal_field_name(name, CHECK_NULL); - - u2 signature_index = cfs->get_u2_fast(); - check_property(valid_symbol_at(signature_index), - "Invalid constant pool index %u for field signature in class file %s", - signature_index, CHECK_NULL); - Symbol* sig = _cp->symbol_at(signature_index); - verify_legal_field_signature(name, sig, CHECK_NULL); - - u2 constantvalue_index = 0; - bool is_synthetic = false; - u2 generic_signature_index = 0; - bool is_static = access_flags.is_static(); - FieldAnnotationCollector parsed_annotations(_loader_data); - - u2 attributes_count = cfs->get_u2_fast(); - if (attributes_count > 0) { - parse_field_attributes(attributes_count, is_static, signature_index, - &constantvalue_index, &is_synthetic, - &generic_signature_index, &parsed_annotations, - CHECK_NULL); - if (parsed_annotations.field_annotations() != NULL) { - if (_fields_annotations == NULL) { - _fields_annotations = MetadataFactory::new_array( - _loader_data, length, NULL, - CHECK_NULL); - } - _fields_annotations->at_put(n, parsed_annotations.field_annotations()); - parsed_annotations.set_field_annotations(NULL); - } - if (parsed_annotations.field_type_annotations() != NULL) { - if (_fields_type_annotations == NULL) { - _fields_type_annotations = MetadataFactory::new_array( - _loader_data, length, NULL, - CHECK_NULL); - } - _fields_type_annotations->at_put(n, parsed_annotations.field_type_annotations()); - parsed_annotations.set_field_type_annotations(NULL); - } - - if (is_synthetic) { - access_flags.set_is_synthetic(); - } - if (generic_signature_index != 0) { - access_flags.set_field_has_generic_signature(); - fa[generic_signature_slot] = generic_signature_index; - generic_signature_slot ++; - num_generic_signature ++; - } - } - - FieldInfo* field = FieldInfo::from_field_array(fa, n); - field->initialize(access_flags.as_short(), - name_index, - signature_index, - constantvalue_index); - BasicType type = _cp->basic_type_for_signature_at(signature_index); - - // Remember how many oops we encountered and compute allocation type - FieldAllocationType atype = fac->update(is_static, type); - field->set_allocation_type(atype); - - // After field is initialized with type, we can augment it with aux info - if (parsed_annotations.has_any_annotations()) - parsed_annotations.apply_to(field); - } - - int index = length; - if (num_injected != 0) { - for (int n = 0; n < num_injected; n++) { - // Check for duplicates - if (injected[n].may_be_java) { - Symbol* name = injected[n].name(); - Symbol* signature = injected[n].signature(); - bool duplicate = false; - for (int i = 0; i < length; i++) { - FieldInfo* f = FieldInfo::from_field_array(fa, i); - if (name == _cp->symbol_at(f->name_index()) && - signature == _cp->symbol_at(f->signature_index())) { - // Symbol is desclared in Java so skip this one - duplicate = true; - break; - } - } - if (duplicate) { - // These will be removed from the field array at the end - continue; - } - } - - // Injected field - FieldInfo* field = FieldInfo::from_field_array(fa, index); - field->initialize(JVM_ACC_FIELD_INTERNAL, - injected[n].name_index, - injected[n].signature_index, - 0); - - BasicType type = FieldType::basic_type(injected[n].signature()); - - // Remember how many oops we encountered and compute allocation type - FieldAllocationType atype = fac->update(false, type); - field->set_allocation_type(atype); - index++; - } - } - - // Now copy the fields' data from the temporary resource array. - // Sometimes injected fields already exist in the Java source so - // the fields array could be too long. In that case the - // fields array is trimed. Also unused slots that were reserved - // for generic signature indexes are discarded. - Array* fields = MetadataFactory::new_array( - _loader_data, index * FieldInfo::field_slots + num_generic_signature, - CHECK_NULL); - _fields = fields; // save in case of error - { - int i = 0; - for (; i < index * FieldInfo::field_slots; i++) { - fields->at_put(i, fa[i]); - } - for (int j = total_fields * FieldInfo::field_slots; - j < generic_signature_slot; j++) { - fields->at_put(i++, fa[j]); - } - assert(i == fields->length(), ""); - } - - if (_need_verify && length > 1) { - // Check duplicated fields - ResourceMark rm(THREAD); - NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, NameSigHash*, HASH_ROW_SIZE); - initialize_hashtable(names_and_sigs); - bool dup = false; - { - debug_only(No_Safepoint_Verifier nsv;) - for (AllFieldStream fs(fields, _cp); !fs.done(); fs.next()) { - Symbol* name = fs.name(); - Symbol* sig = fs.signature(); - // If no duplicates, add name/signature in hashtable names_and_sigs. - if (!put_after_lookup(name, sig, names_and_sigs)) { - dup = true; - break; - } - } - } - if (dup) { - classfile_parse_error("Duplicate field name&signature in class file %s", - CHECK_NULL); - } - } - - return fields; -} - - -static void copy_u2_with_conversion(u2* dest, u2* src, int length) { - while (length-- > 0) { - *dest++ = Bytes::get_Java_u2((u1*) (src++)); - } -} - - -u2* ClassFileParser::parse_exception_table(u4 code_length, - u4 exception_table_length, - TRAPS) { - ClassFileStream* cfs = stream(); - - u2* exception_table_start = cfs->get_u2_buffer(); - assert(exception_table_start != NULL, "null exception table"); - cfs->guarantee_more(8 * exception_table_length, CHECK_NULL); // start_pc, end_pc, handler_pc, catch_type_index - // Will check legal target after parsing code array in verifier. - if (_need_verify) { - for (unsigned int i = 0; i < exception_table_length; i++) { - u2 start_pc = cfs->get_u2_fast(); - u2 end_pc = cfs->get_u2_fast(); - u2 handler_pc = cfs->get_u2_fast(); - u2 catch_type_index = cfs->get_u2_fast(); - guarantee_property((start_pc < end_pc) && (end_pc <= code_length), - "Illegal exception table range in class file %s", - CHECK_NULL); - guarantee_property(handler_pc < code_length, - "Illegal exception table handler in class file %s", - CHECK_NULL); - if (catch_type_index != 0) { - guarantee_property(valid_klass_reference_at(catch_type_index), - "Catch type in exception table has bad constant type in class file %s", CHECK_NULL); - } - } - } else { - cfs->skip_u2_fast(exception_table_length * 4); - } - return exception_table_start; -} - -void ClassFileParser::parse_linenumber_table( - u4 code_attribute_length, u4 code_length, - CompressedLineNumberWriteStream** write_stream, TRAPS) { - ClassFileStream* cfs = stream(); - unsigned int num_entries = cfs->get_u2(CHECK); - - // Each entry is a u2 start_pc, and a u2 line_number - unsigned int length_in_bytes = num_entries * (sizeof(u2) + sizeof(u2)); - - // Verify line number attribute and table length - check_property( - code_attribute_length == sizeof(u2) + length_in_bytes, - "LineNumberTable attribute has wrong length in class file %s", CHECK); - - cfs->guarantee_more(length_in_bytes, CHECK); - - if ((*write_stream) == NULL) { - if (length_in_bytes > fixed_buffer_size) { - (*write_stream) = new CompressedLineNumberWriteStream(length_in_bytes); - } else { - (*write_stream) = new CompressedLineNumberWriteStream( - linenumbertable_buffer, fixed_buffer_size); - } - } - - while (num_entries-- > 0) { - u2 bci = cfs->get_u2_fast(); // start_pc - u2 line = cfs->get_u2_fast(); // line_number - guarantee_property(bci < code_length, - "Invalid pc in LineNumberTable in class file %s", CHECK); - (*write_stream)->write_pair(bci, line); - } -} - - -// Class file LocalVariableTable elements. -class Classfile_LVT_Element VALUE_OBJ_CLASS_SPEC { - public: - u2 start_bci; - u2 length; - u2 name_cp_index; - u2 descriptor_cp_index; - u2 slot; -}; - - -class LVT_Hash: public CHeapObj { - public: - LocalVariableTableElement *_elem; // element - LVT_Hash* _next; // Next entry in hash table -}; - -unsigned int hash(LocalVariableTableElement *elem) { - unsigned int raw_hash = elem->start_bci; - - raw_hash = elem->length + raw_hash * 37; - raw_hash = elem->name_cp_index + raw_hash * 37; - raw_hash = elem->slot + raw_hash * 37; - - return raw_hash % HASH_ROW_SIZE; -} - -void initialize_hashtable(LVT_Hash** table) { - for (int i = 0; i < HASH_ROW_SIZE; i++) { - table[i] = NULL; - } -} - -void clear_hashtable(LVT_Hash** table) { - for (int i = 0; i < HASH_ROW_SIZE; i++) { - LVT_Hash* current = table[i]; - LVT_Hash* next; - while (current != NULL) { - next = current->_next; - current->_next = NULL; - delete(current); - current = next; - } - table[i] = NULL; - } -} - -LVT_Hash* LVT_lookup(LocalVariableTableElement *elem, int index, LVT_Hash** table) { - LVT_Hash* entry = table[index]; - - /* - * 3-tuple start_bci/length/slot has to be unique key, - * so the following comparison seems to be redundant: - * && elem->name_cp_index == entry->_elem->name_cp_index - */ - while (entry != NULL) { - if (elem->start_bci == entry->_elem->start_bci - && elem->length == entry->_elem->length - && elem->name_cp_index == entry->_elem->name_cp_index - && elem->slot == entry->_elem->slot - ) { - return entry; - } - entry = entry->_next; - } - return NULL; -} - -// Return false if the local variable is found in table. -// Return true if no duplicate is found. -// And local variable is added as a new entry in table. -bool LVT_put_after_lookup(LocalVariableTableElement *elem, LVT_Hash** table) { - // First lookup for duplicates - int index = hash(elem); - LVT_Hash* entry = LVT_lookup(elem, index, table); - - if (entry != NULL) { - return false; - } - // No duplicate is found, allocate a new entry and fill it. - if ((entry = new LVT_Hash()) == NULL) { - return false; - } - entry->_elem = elem; - - // Insert into hash table - entry->_next = table[index]; - table[index] = entry; - - return true; -} - -void copy_lvt_element(Classfile_LVT_Element *src, LocalVariableTableElement *lvt) { - lvt->start_bci = Bytes::get_Java_u2((u1*) &src->start_bci); - lvt->length = Bytes::get_Java_u2((u1*) &src->length); - lvt->name_cp_index = Bytes::get_Java_u2((u1*) &src->name_cp_index); - lvt->descriptor_cp_index = Bytes::get_Java_u2((u1*) &src->descriptor_cp_index); - lvt->signature_cp_index = 0; - lvt->slot = Bytes::get_Java_u2((u1*) &src->slot); -} - -// Function is used to parse both attributes: -// LocalVariableTable (LVT) and LocalVariableTypeTable (LVTT) -u2* ClassFileParser::parse_localvariable_table(u4 code_length, - u2 max_locals, - u4 code_attribute_length, - u2* localvariable_table_length, - bool isLVTT, - TRAPS) { - ClassFileStream* cfs = stream(); - const char * tbl_name = (isLVTT) ? "LocalVariableTypeTable" : "LocalVariableTable"; - *localvariable_table_length = cfs->get_u2(CHECK_NULL); - unsigned int size = (*localvariable_table_length) * sizeof(Classfile_LVT_Element) / sizeof(u2); - // Verify local variable table attribute has right length - if (_need_verify) { - guarantee_property(code_attribute_length == (sizeof(*localvariable_table_length) + size * sizeof(u2)), - "%s has wrong length in class file %s", tbl_name, CHECK_NULL); - } - u2* localvariable_table_start = cfs->get_u2_buffer(); - assert(localvariable_table_start != NULL, "null local variable table"); - if (!_need_verify) { - cfs->skip_u2_fast(size); - } else { - cfs->guarantee_more(size * 2, CHECK_NULL); - for(int i = 0; i < (*localvariable_table_length); i++) { - u2 start_pc = cfs->get_u2_fast(); - u2 length = cfs->get_u2_fast(); - u2 name_index = cfs->get_u2_fast(); - u2 descriptor_index = cfs->get_u2_fast(); - u2 index = cfs->get_u2_fast(); - // Assign to a u4 to avoid overflow - u4 end_pc = (u4)start_pc + (u4)length; - - if (start_pc >= code_length) { - classfile_parse_error( - "Invalid start_pc %u in %s in class file %s", - start_pc, tbl_name, CHECK_NULL); - } - if (end_pc > code_length) { - classfile_parse_error( - "Invalid length %u in %s in class file %s", - length, tbl_name, CHECK_NULL); - } - int cp_size = _cp->length(); - guarantee_property(valid_symbol_at(name_index), - "Name index %u in %s has bad constant type in class file %s", - name_index, tbl_name, CHECK_NULL); - guarantee_property(valid_symbol_at(descriptor_index), - "Signature index %u in %s has bad constant type in class file %s", - descriptor_index, tbl_name, CHECK_NULL); - - Symbol* name = _cp->symbol_at(name_index); - Symbol* sig = _cp->symbol_at(descriptor_index); - verify_legal_field_name(name, CHECK_NULL); - u2 extra_slot = 0; - if (!isLVTT) { - verify_legal_field_signature(name, sig, CHECK_NULL); - - // 4894874: check special cases for double and long local variables - if (sig == vmSymbols::type_signature(T_DOUBLE) || - sig == vmSymbols::type_signature(T_LONG)) { - extra_slot = 1; - } - } - guarantee_property((index + extra_slot) < max_locals, - "Invalid index %u in %s in class file %s", - index, tbl_name, CHECK_NULL); - } - } - return localvariable_table_start; -} - - -void ClassFileParser::parse_type_array(u2 array_length, u4 code_length, u4* u1_index, u4* u2_index, - u1* u1_array, u2* u2_array, TRAPS) { - ClassFileStream* cfs = stream(); - u2 index = 0; // index in the array with long/double occupying two slots - u4 i1 = *u1_index; - u4 i2 = *u2_index + 1; - for(int i = 0; i < array_length; i++) { - u1 tag = u1_array[i1++] = cfs->get_u1(CHECK); - index++; - if (tag == ITEM_Long || tag == ITEM_Double) { - index++; - } else if (tag == ITEM_Object) { - u2 class_index = u2_array[i2++] = cfs->get_u2(CHECK); - guarantee_property(valid_klass_reference_at(class_index), - "Bad class index %u in StackMap in class file %s", - class_index, CHECK); - } else if (tag == ITEM_Uninitialized) { - u2 offset = u2_array[i2++] = cfs->get_u2(CHECK); - guarantee_property( - offset < code_length, - "Bad uninitialized type offset %u in StackMap in class file %s", - offset, CHECK); - } else { - guarantee_property( - tag <= (u1)ITEM_Uninitialized, - "Unknown variable type %u in StackMap in class file %s", - tag, CHECK); - } - } - u2_array[*u2_index] = index; - *u1_index = i1; - *u2_index = i2; -} - -u1* ClassFileParser::parse_stackmap_table( - u4 code_attribute_length, TRAPS) { - if (code_attribute_length == 0) - return NULL; - - ClassFileStream* cfs = stream(); - u1* stackmap_table_start = cfs->get_u1_buffer(); - assert(stackmap_table_start != NULL, "null stackmap table"); - - // check code_attribute_length first - stream()->skip_u1(code_attribute_length, CHECK_NULL); - - if (!_need_verify && !DumpSharedSpaces) { - return NULL; - } - return stackmap_table_start; -} - -u2* ClassFileParser::parse_checked_exceptions(u2* checked_exceptions_length, - u4 method_attribute_length, - TRAPS) { - ClassFileStream* cfs = stream(); - cfs->guarantee_more(2, CHECK_NULL); // checked_exceptions_length - *checked_exceptions_length = cfs->get_u2_fast(); - unsigned int size = (*checked_exceptions_length) * sizeof(CheckedExceptionElement) / sizeof(u2); - u2* checked_exceptions_start = cfs->get_u2_buffer(); - assert(checked_exceptions_start != NULL, "null checked exceptions"); - if (!_need_verify) { - cfs->skip_u2_fast(size); - } else { - // Verify each value in the checked exception table - u2 checked_exception; - u2 len = *checked_exceptions_length; - cfs->guarantee_more(2 * len, CHECK_NULL); - for (int i = 0; i < len; i++) { - checked_exception = cfs->get_u2_fast(); - check_property( - valid_klass_reference_at(checked_exception), - "Exception name has bad type at constant pool %u in class file %s", - checked_exception, CHECK_NULL); - } - } - // check exceptions attribute length - if (_need_verify) { - guarantee_property(method_attribute_length == (sizeof(*checked_exceptions_length) + - sizeof(u2) * size), - "Exceptions attribute has wrong length in class file %s", CHECK_NULL); - } - return checked_exceptions_start; -} - -void ClassFileParser::throwIllegalSignature( - const char* type, Symbol* name, Symbol* sig, TRAPS) { - ResourceMark rm(THREAD); - Exceptions::fthrow(THREAD_AND_LOCATION, - vmSymbols::java_lang_ClassFormatError(), - "%s \"%s\" in class %s has illegal signature \"%s\"", type, - name->as_C_string(), _class_name->as_C_string(), sig->as_C_string()); -} - -// Skip an annotation. Return >=limit if there is any problem. -int ClassFileParser::skip_annotation(u1* buffer, int limit, int index) { - // annotation := atype:u2 do(nmem:u2) {member:u2 value} - // value := switch (tag:u1) { ... } - index += 2; // skip atype - if ((index += 2) >= limit) return limit; // read nmem - int nmem = Bytes::get_Java_u2(buffer+index-2); - while (--nmem >= 0 && index < limit) { - index += 2; // skip member - index = skip_annotation_value(buffer, limit, index); - } - return index; -} - -// Skip an annotation value. Return >=limit if there is any problem. -int ClassFileParser::skip_annotation_value(u1* buffer, int limit, int index) { - // value := switch (tag:u1) { - // case B, C, I, S, Z, D, F, J, c: con:u2; - // case e: e_class:u2 e_name:u2; - // case s: s_con:u2; - // case [: do(nval:u2) {value}; - // case @: annotation; - // case s: s_con:u2; - // } - if ((index += 1) >= limit) return limit; // read tag - u1 tag = buffer[index-1]; - switch (tag) { - case 'B': case 'C': case 'I': case 'S': case 'Z': - case 'D': case 'F': case 'J': case 'c': case 's': - index += 2; // skip con or s_con - break; - case 'e': - index += 4; // skip e_class, e_name - break; - case '[': - { - if ((index += 2) >= limit) return limit; // read nval - int nval = Bytes::get_Java_u2(buffer+index-2); - while (--nval >= 0 && index < limit) { - index = skip_annotation_value(buffer, limit, index); - } - } - break; - case '@': - index = skip_annotation(buffer, limit, index); - break; - default: - assert(false, "annotation tag"); - return limit; // bad tag byte - } - return index; -} - -// Sift through annotations, looking for those significant to the VM: -void ClassFileParser::parse_annotations(u1* buffer, int limit, - ClassFileParser::AnnotationCollector* coll, - TRAPS) { - // annotations := do(nann:u2) {annotation} - int index = 0; - if ((index += 2) >= limit) return; // read nann - int nann = Bytes::get_Java_u2(buffer+index-2); - enum { // initial annotation layout - atype_off = 0, // utf8 such as 'Ljava/lang/annotation/Retention;' - count_off = 2, // u2 such as 1 (one value) - member_off = 4, // utf8 such as 'value' - tag_off = 6, // u1 such as 'c' (type) or 'e' (enum) - e_tag_val = 'e', - e_type_off = 7, // utf8 such as 'Ljava/lang/annotation/RetentionPolicy;' - e_con_off = 9, // utf8 payload, such as 'SOURCE', 'CLASS', 'RUNTIME' - e_size = 11, // end of 'e' annotation - c_tag_val = 'c', // payload is type - c_con_off = 7, // utf8 payload, such as 'I' - c_size = 9, // end of 'c' annotation - s_tag_val = 's', // payload is String - s_con_off = 7, // utf8 payload, such as 'Ljava/lang/String;' - s_size = 9, - min_size = 6 // smallest possible size (zero members) - }; - while ((--nann) >= 0 && (index-2 + min_size <= limit)) { - int index0 = index; - index = skip_annotation(buffer, limit, index); - u1* abase = buffer + index0; - int atype = Bytes::get_Java_u2(abase + atype_off); - int count = Bytes::get_Java_u2(abase + count_off); - Symbol* aname = check_symbol_at(_cp, atype); - if (aname == NULL) break; // invalid annotation name - Symbol* member = NULL; - if (count >= 1) { - int member_index = Bytes::get_Java_u2(abase + member_off); - member = check_symbol_at(_cp, member_index); - if (member == NULL) break; // invalid member name - } - - // Here is where parsing particular annotations will take place. - AnnotationCollector::ID id = coll->annotation_index(_loader_data, aname); - if (id == AnnotationCollector::_unknown) continue; - coll->set_annotation(id); - - if (id == AnnotationCollector::_sun_misc_Contended) { - // @Contended can optionally specify the contention group. - // - // Contended group defines the equivalence class over the fields: - // the fields within the same contended group are not treated distinct. - // The only exception is default group, which does not incur the - // equivalence. Naturally, contention group for classes is meaningless. - // - // While the contention group is specified as String, annotation - // values are already interned, and we might as well use the constant - // pool index as the group tag. - // - u2 group_index = 0; // default contended group - if (count == 1 - && s_size == (index - index0) // match size - && s_tag_val == *(abase + tag_off) - && member == vmSymbols::value_name()) { - group_index = Bytes::get_Java_u2(abase + s_con_off); - if (_cp->symbol_at(group_index)->utf8_length() == 0) { - group_index = 0; // default contended group - } - } - coll->set_contended_group(group_index); - } - } -} - -ClassFileParser::AnnotationCollector::ID -ClassFileParser::AnnotationCollector::annotation_index(ClassLoaderData* loader_data, - Symbol* name) { - vmSymbols::SID sid = vmSymbols::find_sid(name); - // Privileged code can use all annotations. Other code silently drops some. - const bool privileged = loader_data->is_the_null_class_loader_data() || - loader_data->is_ext_class_loader_data() || - loader_data->is_anonymous(); - switch (sid) { - case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_reflect_CallerSensitive_signature): - if (_location != _in_method) break; // only allow for methods - if (!privileged) break; // only allow in privileged code - return _method_CallerSensitive; - case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_ForceInline_signature): - if (_location != _in_method) break; // only allow for methods - if (!privileged) break; // only allow in privileged code - return _method_ForceInline; - case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_DontInline_signature): - if (_location != _in_method) break; // only allow for methods - if (!privileged) break; // only allow in privileged code - return _method_DontInline; - case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Compiled_signature): - if (_location != _in_method) break; // only allow for methods - if (!privileged) break; // only allow in privileged code - return _method_LambdaForm_Compiled; - case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_LambdaForm_Hidden_signature): - if (_location != _in_method) break; // only allow for methods - if (!privileged) break; // only allow in privileged code - return _method_LambdaForm_Hidden; - case vmSymbols::VM_SYMBOL_ENUM_NAME(java_lang_invoke_Stable_signature): - if (_location != _in_field) break; // only allow for fields - if (!privileged) break; // only allow in privileged code - return _field_Stable; - case vmSymbols::VM_SYMBOL_ENUM_NAME(sun_misc_Contended_signature): - if (_location != _in_field && _location != _in_class) break; // only allow for fields and classes - if (!EnableContended || (RestrictContended && !privileged)) break; // honor privileges - return _sun_misc_Contended; - default: break; - } - return AnnotationCollector::_unknown; -} - -void ClassFileParser::FieldAnnotationCollector::apply_to(FieldInfo* f) { - if (is_contended()) - f->set_contended_group(contended_group()); - if (is_stable()) - f->set_stable(true); -} - -ClassFileParser::FieldAnnotationCollector::~FieldAnnotationCollector() { - // If there's an error deallocate metadata for field annotations - MetadataFactory::free_array(_loader_data, _field_annotations); - MetadataFactory::free_array(_loader_data, _field_type_annotations); -} - -void ClassFileParser::MethodAnnotationCollector::apply_to(methodHandle m) { - if (has_annotation(_method_CallerSensitive)) - m->set_caller_sensitive(true); - if (has_annotation(_method_ForceInline)) - m->set_force_inline(true); - if (has_annotation(_method_DontInline)) - m->set_dont_inline(true); - if (has_annotation(_method_LambdaForm_Compiled) && m->intrinsic_id() == vmIntrinsics::_none) - m->set_intrinsic_id(vmIntrinsics::_compiledLambdaForm); - if (has_annotation(_method_LambdaForm_Hidden)) - m->set_hidden(true); -} - -void ClassFileParser::ClassAnnotationCollector::apply_to(instanceKlassHandle k) { - k->set_is_contended(is_contended()); -} - - -#define MAX_ARGS_SIZE 255 -#define MAX_CODE_SIZE 65535 -#define INITIAL_MAX_LVT_NUMBER 256 - -/* Copy class file LVT's/LVTT's into the HotSpot internal LVT. - * - * Rules for LVT's and LVTT's are: - * - There can be any number of LVT's and LVTT's. - * - If there are n LVT's, it is the same as if there was just - * one LVT containing all the entries from the n LVT's. - * - There may be no more than one LVT entry per local variable. - * Two LVT entries are 'equal' if these fields are the same: - * start_pc, length, name, slot - * - There may be no more than one LVTT entry per each LVT entry. - * Each LVTT entry has to match some LVT entry. - * - HotSpot internal LVT keeps natural ordering of class file LVT entries. - */ -void ClassFileParser::copy_localvariable_table(ConstMethod* cm, - int lvt_cnt, - u2* localvariable_table_length, - u2** localvariable_table_start, - int lvtt_cnt, - u2* localvariable_type_table_length, - u2** localvariable_type_table_start, - TRAPS) { - - LVT_Hash** lvt_Hash = NEW_RESOURCE_ARRAY(LVT_Hash*, HASH_ROW_SIZE); - initialize_hashtable(lvt_Hash); - - // To fill LocalVariableTable in - Classfile_LVT_Element* cf_lvt; - LocalVariableTableElement* lvt = cm->localvariable_table_start(); - - for (int tbl_no = 0; tbl_no < lvt_cnt; tbl_no++) { - cf_lvt = (Classfile_LVT_Element *) localvariable_table_start[tbl_no]; - for (int idx = 0; idx < localvariable_table_length[tbl_no]; idx++, lvt++) { - copy_lvt_element(&cf_lvt[idx], lvt); - // If no duplicates, add LVT elem in hashtable lvt_Hash. - if (LVT_put_after_lookup(lvt, lvt_Hash) == false - && _need_verify - && _major_version >= JAVA_1_5_VERSION) { - clear_hashtable(lvt_Hash); - classfile_parse_error("Duplicated LocalVariableTable attribute " - "entry for '%s' in class file %s", - _cp->symbol_at(lvt->name_cp_index)->as_utf8(), - CHECK); - } - } - } - - // To merge LocalVariableTable and LocalVariableTypeTable - Classfile_LVT_Element* cf_lvtt; - LocalVariableTableElement lvtt_elem; - - for (int tbl_no = 0; tbl_no < lvtt_cnt; tbl_no++) { - cf_lvtt = (Classfile_LVT_Element *) localvariable_type_table_start[tbl_no]; - for (int idx = 0; idx < localvariable_type_table_length[tbl_no]; idx++) { - copy_lvt_element(&cf_lvtt[idx], &lvtt_elem); - int index = hash(&lvtt_elem); - LVT_Hash* entry = LVT_lookup(&lvtt_elem, index, lvt_Hash); - if (entry == NULL) { - if (_need_verify) { - clear_hashtable(lvt_Hash); - classfile_parse_error("LVTT entry for '%s' in class file %s " - "does not match any LVT entry", - _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), - CHECK); - } - } else if (entry->_elem->signature_cp_index != 0 && _need_verify) { - clear_hashtable(lvt_Hash); - classfile_parse_error("Duplicated LocalVariableTypeTable attribute " - "entry for '%s' in class file %s", - _cp->symbol_at(lvtt_elem.name_cp_index)->as_utf8(), - CHECK); - } else { - // to add generic signatures into LocalVariableTable - entry->_elem->signature_cp_index = lvtt_elem.descriptor_cp_index; - } - } - } - clear_hashtable(lvt_Hash); -} - - -void ClassFileParser::copy_method_annotations(ConstMethod* cm, - u1* runtime_visible_annotations, - int runtime_visible_annotations_length, - u1* runtime_invisible_annotations, - int runtime_invisible_annotations_length, - u1* runtime_visible_parameter_annotations, - int runtime_visible_parameter_annotations_length, - u1* runtime_invisible_parameter_annotations, - int runtime_invisible_parameter_annotations_length, - u1* runtime_visible_type_annotations, - int runtime_visible_type_annotations_length, - u1* runtime_invisible_type_annotations, - int runtime_invisible_type_annotations_length, - u1* annotation_default, - int annotation_default_length, - TRAPS) { - - AnnotationArray* a; - - if (runtime_visible_annotations_length + - runtime_invisible_annotations_length > 0) { - a = assemble_annotations(runtime_visible_annotations, - runtime_visible_annotations_length, - runtime_invisible_annotations, - runtime_invisible_annotations_length, - CHECK); - cm->set_method_annotations(a); - } - - if (runtime_visible_parameter_annotations_length + - runtime_invisible_parameter_annotations_length > 0) { - a = assemble_annotations(runtime_visible_parameter_annotations, - runtime_visible_parameter_annotations_length, - runtime_invisible_parameter_annotations, - runtime_invisible_parameter_annotations_length, - CHECK); - cm->set_parameter_annotations(a); - } - - if (annotation_default_length > 0) { - a = assemble_annotations(annotation_default, - annotation_default_length, - NULL, - 0, - CHECK); - cm->set_default_annotations(a); - } - - if (runtime_visible_type_annotations_length + - runtime_invisible_type_annotations_length > 0) { - a = assemble_annotations(runtime_visible_type_annotations, - runtime_visible_type_annotations_length, - runtime_invisible_type_annotations, - runtime_invisible_type_annotations_length, - CHECK); - cm->set_type_annotations(a); - } -} - - -// Note: the parse_method below is big and clunky because all parsing of the code and exceptions -// attribute is inlined. This is cumbersome to avoid since we inline most of the parts in the -// Method* to save footprint, so we only know the size of the resulting Method* when the -// entire method attribute is parsed. -// -// The promoted_flags parameter is used to pass relevant access_flags -// from the method back up to the containing klass. These flag values -// are added to klass's access_flags. - -methodHandle ClassFileParser::parse_method(bool is_interface, - AccessFlags *promoted_flags, - TRAPS) { - ClassFileStream* cfs = stream(); - methodHandle nullHandle; - ResourceMark rm(THREAD); - // Parse fixed parts - cfs->guarantee_more(8, CHECK_(nullHandle)); // access_flags, name_index, descriptor_index, attributes_count - - int flags = cfs->get_u2_fast(); - u2 name_index = cfs->get_u2_fast(); - int cp_size = _cp->length(); - check_property( - valid_symbol_at(name_index), - "Illegal constant pool index %u for method name in class file %s", - name_index, CHECK_(nullHandle)); - Symbol* name = _cp->symbol_at(name_index); - verify_legal_method_name(name, CHECK_(nullHandle)); - - u2 signature_index = cfs->get_u2_fast(); - guarantee_property( - valid_symbol_at(signature_index), - "Illegal constant pool index %u for method signature in class file %s", - signature_index, CHECK_(nullHandle)); - Symbol* signature = _cp->symbol_at(signature_index); - - AccessFlags access_flags; - if (name == vmSymbols::class_initializer_name()) { - // We ignore the other access flags for a valid class initializer. - // (JVM Spec 2nd ed., chapter 4.6) - if (_major_version < 51) { // backward compatibility - flags = JVM_ACC_STATIC; - } else if ((flags & JVM_ACC_STATIC) == JVM_ACC_STATIC) { - flags &= JVM_ACC_STATIC | JVM_ACC_STRICT; - } - } else { - verify_legal_method_modifiers(flags, is_interface, name, CHECK_(nullHandle)); - } - - int args_size = -1; // only used when _need_verify is true - if (_need_verify) { - args_size = ((flags & JVM_ACC_STATIC) ? 0 : 1) + - verify_legal_method_signature(name, signature, CHECK_(nullHandle)); - if (args_size > MAX_ARGS_SIZE) { - classfile_parse_error("Too many arguments in method signature in class file %s", CHECK_(nullHandle)); - } - } - - access_flags.set_flags(flags & JVM_RECOGNIZED_METHOD_MODIFIERS); - - // Default values for code and exceptions attribute elements - u2 max_stack = 0; - u2 max_locals = 0; - u4 code_length = 0; - u1* code_start = 0; - u2 exception_table_length = 0; - u2* exception_table_start = NULL; - Array* exception_handlers = Universe::the_empty_int_array(); - u2 checked_exceptions_length = 0; - u2* checked_exceptions_start = NULL; - CompressedLineNumberWriteStream* linenumber_table = NULL; - int linenumber_table_length = 0; - int total_lvt_length = 0; - u2 lvt_cnt = 0; - u2 lvtt_cnt = 0; - bool lvt_allocated = false; - u2 max_lvt_cnt = INITIAL_MAX_LVT_NUMBER; - u2 max_lvtt_cnt = INITIAL_MAX_LVT_NUMBER; - u2* localvariable_table_length; - u2** localvariable_table_start; - u2* localvariable_type_table_length; - u2** localvariable_type_table_start; - u2 method_parameters_length = 0; - u1* method_parameters_data = NULL; - bool method_parameters_seen = false; - bool parsed_code_attribute = false; - bool parsed_checked_exceptions_attribute = false; - bool parsed_stackmap_attribute = false; - // stackmap attribute - JDK1.5 - u1* stackmap_data = NULL; - int stackmap_data_length = 0; - u2 generic_signature_index = 0; - MethodAnnotationCollector parsed_annotations; - u1* runtime_visible_annotations = NULL; - int runtime_visible_annotations_length = 0; - u1* runtime_invisible_annotations = NULL; - int runtime_invisible_annotations_length = 0; - u1* runtime_visible_parameter_annotations = NULL; - int runtime_visible_parameter_annotations_length = 0; - u1* runtime_invisible_parameter_annotations = NULL; - int runtime_invisible_parameter_annotations_length = 0; - u1* runtime_visible_type_annotations = NULL; - int runtime_visible_type_annotations_length = 0; - u1* runtime_invisible_type_annotations = NULL; - int runtime_invisible_type_annotations_length = 0; - bool runtime_invisible_annotations_exists = false; - bool runtime_invisible_type_annotations_exists = false; - bool runtime_invisible_parameter_annotations_exists = false; - u1* annotation_default = NULL; - int annotation_default_length = 0; - - // Parse code and exceptions attribute - u2 method_attributes_count = cfs->get_u2_fast(); - while (method_attributes_count--) { - cfs->guarantee_more(6, CHECK_(nullHandle)); // method_attribute_name_index, method_attribute_length - u2 method_attribute_name_index = cfs->get_u2_fast(); - u4 method_attribute_length = cfs->get_u4_fast(); - check_property( - valid_symbol_at(method_attribute_name_index), - "Invalid method attribute name index %u in class file %s", - method_attribute_name_index, CHECK_(nullHandle)); - - Symbol* method_attribute_name = _cp->symbol_at(method_attribute_name_index); - if (method_attribute_name == vmSymbols::tag_code()) { - // Parse Code attribute - if (_need_verify) { - guarantee_property( - !access_flags.is_native() && !access_flags.is_abstract(), - "Code attribute in native or abstract methods in class file %s", - CHECK_(nullHandle)); - } - if (parsed_code_attribute) { - classfile_parse_error("Multiple Code attributes in class file %s", CHECK_(nullHandle)); - } - parsed_code_attribute = true; - - // Stack size, locals size, and code size - if (_major_version == 45 && _minor_version <= 2) { - cfs->guarantee_more(4, CHECK_(nullHandle)); - max_stack = cfs->get_u1_fast(); - max_locals = cfs->get_u1_fast(); - code_length = cfs->get_u2_fast(); - } else { - cfs->guarantee_more(8, CHECK_(nullHandle)); - max_stack = cfs->get_u2_fast(); - max_locals = cfs->get_u2_fast(); - code_length = cfs->get_u4_fast(); - } - if (_need_verify) { - guarantee_property(args_size <= max_locals, - "Arguments can't fit into locals in class file %s", CHECK_(nullHandle)); - guarantee_property(code_length > 0 && code_length <= MAX_CODE_SIZE, - "Invalid method Code length %u in class file %s", - code_length, CHECK_(nullHandle)); - } - // Code pointer - code_start = cfs->get_u1_buffer(); - assert(code_start != NULL, "null code start"); - cfs->guarantee_more(code_length, CHECK_(nullHandle)); - cfs->skip_u1_fast(code_length); - - // Exception handler table - cfs->guarantee_more(2, CHECK_(nullHandle)); // exception_table_length - exception_table_length = cfs->get_u2_fast(); - if (exception_table_length > 0) { - exception_table_start = - parse_exception_table(code_length, exception_table_length, CHECK_(nullHandle)); - } - - // Parse additional attributes in code attribute - cfs->guarantee_more(2, CHECK_(nullHandle)); // code_attributes_count - u2 code_attributes_count = cfs->get_u2_fast(); - - unsigned int calculated_attribute_length = 0; - - if (_major_version > 45 || (_major_version == 45 && _minor_version > 2)) { - calculated_attribute_length = - sizeof(max_stack) + sizeof(max_locals) + sizeof(code_length); - } else { - // max_stack, locals and length are smaller in pre-version 45.2 classes - calculated_attribute_length = sizeof(u1) + sizeof(u1) + sizeof(u2); - } - calculated_attribute_length += - code_length + - sizeof(exception_table_length) + - sizeof(code_attributes_count) + - exception_table_length * - ( sizeof(u2) + // start_pc - sizeof(u2) + // end_pc - sizeof(u2) + // handler_pc - sizeof(u2) ); // catch_type_index - - while (code_attributes_count--) { - cfs->guarantee_more(6, CHECK_(nullHandle)); // code_attribute_name_index, code_attribute_length - u2 code_attribute_name_index = cfs->get_u2_fast(); - u4 code_attribute_length = cfs->get_u4_fast(); - calculated_attribute_length += code_attribute_length + - sizeof(code_attribute_name_index) + - sizeof(code_attribute_length); - check_property(valid_symbol_at(code_attribute_name_index), - "Invalid code attribute name index %u in class file %s", - code_attribute_name_index, - CHECK_(nullHandle)); - if (LoadLineNumberTables && - _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_line_number_table()) { - // Parse and compress line number table - parse_linenumber_table(code_attribute_length, code_length, - &linenumber_table, CHECK_(nullHandle)); - - } else if (LoadLocalVariableTables && - _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_table()) { - // Parse local variable table - if (!lvt_allocated) { - localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2, INITIAL_MAX_LVT_NUMBER); - localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2*, INITIAL_MAX_LVT_NUMBER); - localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2, INITIAL_MAX_LVT_NUMBER); - localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2*, INITIAL_MAX_LVT_NUMBER); - lvt_allocated = true; - } - if (lvt_cnt == max_lvt_cnt) { - max_lvt_cnt <<= 1; - localvariable_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_table_length, lvt_cnt, max_lvt_cnt); - localvariable_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_table_start, lvt_cnt, max_lvt_cnt); - } - localvariable_table_start[lvt_cnt] = - parse_localvariable_table(code_length, - max_locals, - code_attribute_length, - &localvariable_table_length[lvt_cnt], - false, // is not LVTT - CHECK_(nullHandle)); - total_lvt_length += localvariable_table_length[lvt_cnt]; - lvt_cnt++; - } else if (LoadLocalVariableTypeTables && - _major_version >= JAVA_1_5_VERSION && - _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_local_variable_type_table()) { - if (!lvt_allocated) { - localvariable_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2, INITIAL_MAX_LVT_NUMBER); - localvariable_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2*, INITIAL_MAX_LVT_NUMBER); - localvariable_type_table_length = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2, INITIAL_MAX_LVT_NUMBER); - localvariable_type_table_start = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, u2*, INITIAL_MAX_LVT_NUMBER); - lvt_allocated = true; - } - // Parse local variable type table - if (lvtt_cnt == max_lvtt_cnt) { - max_lvtt_cnt <<= 1; - localvariable_type_table_length = REALLOC_RESOURCE_ARRAY(u2, localvariable_type_table_length, lvtt_cnt, max_lvtt_cnt); - localvariable_type_table_start = REALLOC_RESOURCE_ARRAY(u2*, localvariable_type_table_start, lvtt_cnt, max_lvtt_cnt); - } - localvariable_type_table_start[lvtt_cnt] = - parse_localvariable_table(code_length, - max_locals, - code_attribute_length, - &localvariable_type_table_length[lvtt_cnt], - true, // is LVTT - CHECK_(nullHandle)); - lvtt_cnt++; - } else if (_major_version >= Verifier::STACKMAP_ATTRIBUTE_MAJOR_VERSION && - _cp->symbol_at(code_attribute_name_index) == vmSymbols::tag_stack_map_table()) { - // Stack map is only needed by the new verifier in JDK1.5. - if (parsed_stackmap_attribute) { - classfile_parse_error("Multiple StackMapTable attributes in class file %s", CHECK_(nullHandle)); - } - stackmap_data = parse_stackmap_table(code_attribute_length, CHECK_(nullHandle)); - stackmap_data_length = code_attribute_length; - parsed_stackmap_attribute = true; - } else { - // Skip unknown attributes - cfs->skip_u1(code_attribute_length, CHECK_(nullHandle)); - } - } - // check method attribute length - if (_need_verify) { - guarantee_property(method_attribute_length == calculated_attribute_length, - "Code segment has wrong length in class file %s", CHECK_(nullHandle)); - } - } else if (method_attribute_name == vmSymbols::tag_exceptions()) { - // Parse Exceptions attribute - if (parsed_checked_exceptions_attribute) { - classfile_parse_error("Multiple Exceptions attributes in class file %s", CHECK_(nullHandle)); - } - parsed_checked_exceptions_attribute = true; - checked_exceptions_start = - parse_checked_exceptions(&checked_exceptions_length, - method_attribute_length, - CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_method_parameters()) { - // reject multiple method parameters - if (method_parameters_seen) { - classfile_parse_error("Multiple MethodParameters attributes in class file %s", CHECK_(nullHandle)); - } - method_parameters_seen = true; - method_parameters_length = cfs->get_u1_fast(); - if (method_attribute_length != (method_parameters_length * 4u) + 1u) { - classfile_parse_error( - "Invalid MethodParameters method attribute length %u in class file", - method_attribute_length, CHECK_(nullHandle)); - } - method_parameters_data = cfs->get_u1_buffer(); - cfs->skip_u2_fast(method_parameters_length); - cfs->skip_u2_fast(method_parameters_length); - // ignore this attribute if it cannot be reflected - if (!SystemDictionary::Parameter_klass_loaded()) - method_parameters_length = 0; - } else if (method_attribute_name == vmSymbols::tag_synthetic()) { - if (method_attribute_length != 0) { - classfile_parse_error( - "Invalid Synthetic method attribute length %u in class file %s", - method_attribute_length, CHECK_(nullHandle)); - } - // Should we check that there hasn't already been a synthetic attribute? - access_flags.set_is_synthetic(); - } else if (method_attribute_name == vmSymbols::tag_deprecated()) { // 4276120 - if (method_attribute_length != 0) { - classfile_parse_error( - "Invalid Deprecated method attribute length %u in class file %s", - method_attribute_length, CHECK_(nullHandle)); - } - } else if (_major_version >= JAVA_1_5_VERSION) { - if (method_attribute_name == vmSymbols::tag_signature()) { - if (method_attribute_length != 2) { - classfile_parse_error( - "Invalid Signature attribute length %u in class file %s", - method_attribute_length, CHECK_(nullHandle)); - } - generic_signature_index = parse_generic_signature_attribute(CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_runtime_visible_annotations()) { - if (runtime_visible_annotations != NULL) { - classfile_parse_error( - "Multiple RuntimeVisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle)); - } - runtime_visible_annotations_length = method_attribute_length; - runtime_visible_annotations = cfs->get_u1_buffer(); - assert(runtime_visible_annotations != NULL, "null visible annotations"); - parse_annotations(runtime_visible_annotations, - runtime_visible_annotations_length, &parsed_annotations, - CHECK_(nullHandle)); - cfs->skip_u1(runtime_visible_annotations_length, CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_annotations()) { - if (runtime_invisible_annotations_exists) { - classfile_parse_error( - "Multiple RuntimeInvisibleAnnotations attributes for method in class file %s", CHECK_(nullHandle)); - } - runtime_invisible_annotations_exists = true; - if (PreserveAllAnnotations) { - runtime_invisible_annotations_length = method_attribute_length; - runtime_invisible_annotations = cfs->get_u1_buffer(); - assert(runtime_invisible_annotations != NULL, "null invisible annotations"); - } - cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_runtime_visible_parameter_annotations()) { - if (runtime_visible_parameter_annotations != NULL) { - classfile_parse_error( - "Multiple RuntimeVisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle)); - } - runtime_visible_parameter_annotations_length = method_attribute_length; - runtime_visible_parameter_annotations = cfs->get_u1_buffer(); - assert(runtime_visible_parameter_annotations != NULL, "null visible parameter annotations"); - cfs->skip_u1(runtime_visible_parameter_annotations_length, CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_parameter_annotations()) { - if (runtime_invisible_parameter_annotations_exists) { - classfile_parse_error( - "Multiple RuntimeInvisibleParameterAnnotations attributes for method in class file %s", CHECK_(nullHandle)); - } - runtime_invisible_parameter_annotations_exists = true; - if (PreserveAllAnnotations) { - runtime_invisible_parameter_annotations_length = method_attribute_length; - runtime_invisible_parameter_annotations = cfs->get_u1_buffer(); - assert(runtime_invisible_parameter_annotations != NULL, "null invisible parameter annotations"); - } - cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_annotation_default()) { - if (annotation_default != NULL) { - classfile_parse_error( - "Multiple AnnotationDefault attributes for method in class file %s", - CHECK_(nullHandle)); - } - annotation_default_length = method_attribute_length; - annotation_default = cfs->get_u1_buffer(); - assert(annotation_default != NULL, "null annotation default"); - cfs->skip_u1(annotation_default_length, CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_runtime_visible_type_annotations()) { - if (runtime_visible_type_annotations != NULL) { - classfile_parse_error( - "Multiple RuntimeVisibleTypeAnnotations attributes for method in class file %s", - CHECK_(nullHandle)); - } - runtime_visible_type_annotations_length = method_attribute_length; - runtime_visible_type_annotations = cfs->get_u1_buffer(); - assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); - // No need for the VM to parse Type annotations - cfs->skip_u1(runtime_visible_type_annotations_length, CHECK_(nullHandle)); - } else if (method_attribute_name == vmSymbols::tag_runtime_invisible_type_annotations()) { - if (runtime_invisible_type_annotations_exists) { - classfile_parse_error( - "Multiple RuntimeInvisibleTypeAnnotations attributes for method in class file %s", - CHECK_(nullHandle)); - } else { - runtime_invisible_type_annotations_exists = true; - } - if (PreserveAllAnnotations) { - runtime_invisible_type_annotations_length = method_attribute_length; - runtime_invisible_type_annotations = cfs->get_u1_buffer(); - assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); - } - cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); - } else { - // Skip unknown attributes - cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); - } - } else { - // Skip unknown attributes - cfs->skip_u1(method_attribute_length, CHECK_(nullHandle)); - } - } - - if (linenumber_table != NULL) { - linenumber_table->write_terminator(); - linenumber_table_length = linenumber_table->position(); - } - - // Make sure there's at least one Code attribute in non-native/non-abstract method - if (_need_verify) { - guarantee_property(access_flags.is_native() || access_flags.is_abstract() || parsed_code_attribute, - "Absent Code attribute in method that is not native or abstract in class file %s", CHECK_(nullHandle)); - } - - // All sizing information for a Method* is finally available, now create it - InlineTableSizes sizes( - total_lvt_length, - linenumber_table_length, - exception_table_length, - checked_exceptions_length, - method_parameters_length, - generic_signature_index, - runtime_visible_annotations_length + - runtime_invisible_annotations_length, - runtime_visible_parameter_annotations_length + - runtime_invisible_parameter_annotations_length, - runtime_visible_type_annotations_length + - runtime_invisible_type_annotations_length, - annotation_default_length, - 0); - - Method* m = Method::allocate( - _loader_data, code_length, access_flags, &sizes, - ConstMethod::NORMAL, CHECK_(nullHandle)); - - ClassLoadingService::add_class_method_size(m->size()*HeapWordSize); - - // Fill in information from fixed part (access_flags already set) - m->set_constants(_cp); - m->set_name_index(name_index); - m->set_signature_index(signature_index); -#ifdef CC_INTERP - // hmm is there a gc issue here?? - ResultTypeFinder rtf(_cp->symbol_at(signature_index)); - m->set_result_index(rtf.type()); -#endif - - if (args_size >= 0) { - m->set_size_of_parameters(args_size); - } else { - m->compute_size_of_parameters(THREAD); - } -#ifdef ASSERT - if (args_size >= 0) { - m->compute_size_of_parameters(THREAD); - assert(args_size == m->size_of_parameters(), ""); - } -#endif - - // Fill in code attribute information - m->set_max_stack(max_stack); - m->set_max_locals(max_locals); - if (stackmap_data != NULL) { - m->constMethod()->copy_stackmap_data(_loader_data, stackmap_data, - stackmap_data_length, CHECK_NULL); - } - - // Copy byte codes - m->set_code(code_start); - - // Copy line number table - if (linenumber_table != NULL) { - memcpy(m->compressed_linenumber_table(), - linenumber_table->buffer(), linenumber_table_length); - } - - // Copy exception table - if (exception_table_length > 0) { - int size = - exception_table_length * sizeof(ExceptionTableElement) / sizeof(u2); - copy_u2_with_conversion((u2*) m->exception_table_start(), - exception_table_start, size); - } - - // Copy method parameters - if (method_parameters_length > 0) { - MethodParametersElement* elem = m->constMethod()->method_parameters_start(); - for (int i = 0; i < method_parameters_length; i++) { - elem[i].name_cp_index = Bytes::get_Java_u2(method_parameters_data); - method_parameters_data += 2; - elem[i].flags = Bytes::get_Java_u2(method_parameters_data); - method_parameters_data += 2; - } - } - - // Copy checked exceptions - if (checked_exceptions_length > 0) { - int size = checked_exceptions_length * sizeof(CheckedExceptionElement) / sizeof(u2); - copy_u2_with_conversion((u2*) m->checked_exceptions_start(), checked_exceptions_start, size); - } - - // Copy class file LVT's/LVTT's into the HotSpot internal LVT. - if (total_lvt_length > 0) { - promoted_flags->set_has_localvariable_table(); - copy_localvariable_table(m->constMethod(), lvt_cnt, - localvariable_table_length, - localvariable_table_start, - lvtt_cnt, - localvariable_type_table_length, - localvariable_type_table_start, CHECK_NULL); - } - - if (parsed_annotations.has_any_annotations()) - parsed_annotations.apply_to(m); - - // Copy annotations - copy_method_annotations(m->constMethod(), - runtime_visible_annotations, - runtime_visible_annotations_length, - runtime_invisible_annotations, - runtime_invisible_annotations_length, - runtime_visible_parameter_annotations, - runtime_visible_parameter_annotations_length, - runtime_invisible_parameter_annotations, - runtime_invisible_parameter_annotations_length, - runtime_visible_type_annotations, - runtime_visible_type_annotations_length, - runtime_invisible_type_annotations, - runtime_invisible_type_annotations_length, - annotation_default, - annotation_default_length, - CHECK_NULL); - - if (name == vmSymbols::finalize_method_name() && - signature == vmSymbols::void_method_signature()) { - if (m->is_empty_method()) { - _has_empty_finalizer = true; - } else { - _has_finalizer = true; - } - } - if (name == vmSymbols::object_initializer_name() && - signature == vmSymbols::void_method_signature() && - m->is_vanilla_constructor()) { - _has_vanilla_constructor = true; - } - - NOT_PRODUCT(m->verify()); - return m; -} - - -// The promoted_flags parameter is used to pass relevant access_flags -// from the methods back up to the containing klass. These flag values -// are added to klass's access_flags. - -Array* ClassFileParser::parse_methods(bool is_interface, - AccessFlags* promoted_flags, - bool* has_final_method, - bool* has_default_methods, - TRAPS) { - ClassFileStream* cfs = stream(); - cfs->guarantee_more(2, CHECK_NULL); // length - u2 length = cfs->get_u2_fast(); - if (length == 0) { - _methods = Universe::the_empty_method_array(); - } else { - _methods = MetadataFactory::new_array(_loader_data, length, NULL, CHECK_NULL); - - HandleMark hm(THREAD); - for (int index = 0; index < length; index++) { - methodHandle method = parse_method(is_interface, - promoted_flags, - CHECK_NULL); - - if (method->is_final()) { - *has_final_method = true; - } - if (is_interface && !(*has_default_methods) - && !method->is_abstract() && !method->is_static() - && !method->is_private()) { - // default method - *has_default_methods = true; - } - _methods->at_put(index, method()); - } - - if (_need_verify && length > 1) { - // Check duplicated methods - ResourceMark rm(THREAD); - NameSigHash** names_and_sigs = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, NameSigHash*, HASH_ROW_SIZE); - initialize_hashtable(names_and_sigs); - bool dup = false; - { - debug_only(No_Safepoint_Verifier nsv;) - for (int i = 0; i < length; i++) { - Method* m = _methods->at(i); - // If no duplicates, add name/signature in hashtable names_and_sigs. - if (!put_after_lookup(m->name(), m->signature(), names_and_sigs)) { - dup = true; - break; - } - } - } - if (dup) { - classfile_parse_error("Duplicate method name&signature in class file %s", - CHECK_NULL); - } - } - } - return _methods; -} - - -intArray* ClassFileParser::sort_methods(Array* methods) { - int length = methods->length(); - // If JVMTI original method ordering or sharing is enabled we have to - // remember the original class file ordering. - // We temporarily use the vtable_index field in the Method* to store the - // class file index, so we can read in after calling qsort. - // Put the method ordering in the shared archive. - if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { - for (int index = 0; index < length; index++) { - Method* m = methods->at(index); - assert(!m->valid_vtable_index(), "vtable index should not be set"); - m->set_vtable_index(index); - } - } - // Sort method array by ascending method name (for faster lookups & vtable construction) - // Note that the ordering is not alphabetical, see Symbol::fast_compare - Method::sort_methods(methods); - - intArray* method_ordering = NULL; - // If JVMTI original method ordering or sharing is enabled construct int - // array remembering the original ordering - if (JvmtiExport::can_maintain_original_method_order() || DumpSharedSpaces) { - method_ordering = new intArray(length); - for (int index = 0; index < length; index++) { - Method* m = methods->at(index); - int old_index = m->vtable_index(); - assert(old_index >= 0 && old_index < length, "invalid method index"); - method_ordering->at_put(index, old_index); - m->set_vtable_index(Method::invalid_vtable_index); - } - } - return method_ordering; -} - -// Parse generic_signature attribute for methods and fields -u2 ClassFileParser::parse_generic_signature_attribute(TRAPS) { - ClassFileStream* cfs = stream(); - cfs->guarantee_more(2, CHECK_0); // generic_signature_index - u2 generic_signature_index = cfs->get_u2_fast(); - check_property( - valid_symbol_at(generic_signature_index), - "Invalid Signature attribute at constant pool index %u in class file %s", - generic_signature_index, CHECK_0); - return generic_signature_index; -} - -void ClassFileParser::parse_classfile_sourcefile_attribute(TRAPS) { - ClassFileStream* cfs = stream(); - cfs->guarantee_more(2, CHECK); // sourcefile_index - u2 sourcefile_index = cfs->get_u2_fast(); - check_property( - valid_symbol_at(sourcefile_index), - "Invalid SourceFile attribute at constant pool index %u in class file %s", - sourcefile_index, CHECK); - set_class_sourcefile_index(sourcefile_index); -} - - - -void ClassFileParser::parse_classfile_source_debug_extension_attribute(int length, TRAPS) { - ClassFileStream* cfs = stream(); - u1* sde_buffer = cfs->get_u1_buffer(); - assert(sde_buffer != NULL, "null sde buffer"); - - // Don't bother storing it if there is no way to retrieve it - if (JvmtiExport::can_get_source_debug_extension()) { - assert((length+1) > length, "Overflow checking"); - u1* sde = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, u1, length+1); - for (int i = 0; i < length; i++) { - sde[i] = sde_buffer[i]; - } - sde[length] = '\0'; - set_class_sde_buffer((char*)sde, length); - } - // Got utf8 string, set stream position forward - cfs->skip_u1(length, CHECK); -} - - -// Inner classes can be static, private or protected (classic VM does this) -#define RECOGNIZED_INNER_CLASS_MODIFIERS (JVM_RECOGNIZED_CLASS_MODIFIERS | JVM_ACC_PRIVATE | JVM_ACC_PROTECTED | JVM_ACC_STATIC) - -// Return number of classes in the inner classes attribute table -u2 ClassFileParser::parse_classfile_inner_classes_attribute(u1* inner_classes_attribute_start, - bool parsed_enclosingmethod_attribute, - u2 enclosing_method_class_index, - u2 enclosing_method_method_index, - TRAPS) { - ClassFileStream* cfs = stream(); - u1* current_mark = cfs->current(); - u2 length = 0; - if (inner_classes_attribute_start != NULL) { - cfs->set_current(inner_classes_attribute_start); - cfs->guarantee_more(2, CHECK_0); // length - length = cfs->get_u2_fast(); - } - - // 4-tuples of shorts of inner classes data and 2 shorts of enclosing - // method data: - // [inner_class_info_index, - // outer_class_info_index, - // inner_name_index, - // inner_class_access_flags, - // ... - // enclosing_method_class_index, - // enclosing_method_method_index] - int size = length * 4 + (parsed_enclosingmethod_attribute ? 2 : 0); - Array* inner_classes = MetadataFactory::new_array(_loader_data, size, CHECK_0); - _inner_classes = inner_classes; - - int index = 0; - int cp_size = _cp->length(); - cfs->guarantee_more(8 * length, CHECK_0); // 4-tuples of u2 - for (int n = 0; n < length; n++) { - // Inner class index - u2 inner_class_info_index = cfs->get_u2_fast(); - check_property( - inner_class_info_index == 0 || - valid_klass_reference_at(inner_class_info_index), - "inner_class_info_index %u has bad constant type in class file %s", - inner_class_info_index, CHECK_0); - // Outer class index - u2 outer_class_info_index = cfs->get_u2_fast(); - check_property( - outer_class_info_index == 0 || - valid_klass_reference_at(outer_class_info_index), - "outer_class_info_index %u has bad constant type in class file %s", - outer_class_info_index, CHECK_0); - // Inner class name - u2 inner_name_index = cfs->get_u2_fast(); - check_property( - inner_name_index == 0 || valid_symbol_at(inner_name_index), - "inner_name_index %u has bad constant type in class file %s", - inner_name_index, CHECK_0); - if (_need_verify) { - guarantee_property(inner_class_info_index != outer_class_info_index, - "Class is both outer and inner class in class file %s", CHECK_0); - } - // Access flags - AccessFlags inner_access_flags; - jint flags = cfs->get_u2_fast() & RECOGNIZED_INNER_CLASS_MODIFIERS; - if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { - // Set abstract bit for old class files for backward compatibility - flags |= JVM_ACC_ABSTRACT; - } - verify_legal_class_modifiers(flags, CHECK_0); - inner_access_flags.set_flags(flags); - - inner_classes->at_put(index++, inner_class_info_index); - inner_classes->at_put(index++, outer_class_info_index); - inner_classes->at_put(index++, inner_name_index); - inner_classes->at_put(index++, inner_access_flags.as_short()); - } - - // 4347400: make sure there's no duplicate entry in the classes array - if (_need_verify && _major_version >= JAVA_1_5_VERSION) { - for(int i = 0; i < length * 4; i += 4) { - for(int j = i + 4; j < length * 4; j += 4) { - guarantee_property((inner_classes->at(i) != inner_classes->at(j) || - inner_classes->at(i+1) != inner_classes->at(j+1) || - inner_classes->at(i+2) != inner_classes->at(j+2) || - inner_classes->at(i+3) != inner_classes->at(j+3)), - "Duplicate entry in InnerClasses in class file %s", - CHECK_0); - } - } - } - - // Set EnclosingMethod class and method indexes. - if (parsed_enclosingmethod_attribute) { - inner_classes->at_put(index++, enclosing_method_class_index); - inner_classes->at_put(index++, enclosing_method_method_index); - } - assert(index == size, "wrong size"); - - // Restore buffer's current position. - cfs->set_current(current_mark); - - return length; -} - -void ClassFileParser::parse_classfile_synthetic_attribute(TRAPS) { - set_class_synthetic_flag(true); -} - -void ClassFileParser::parse_classfile_signature_attribute(TRAPS) { - ClassFileStream* cfs = stream(); - u2 signature_index = cfs->get_u2(CHECK); - check_property( - valid_symbol_at(signature_index), - "Invalid constant pool index %u in Signature attribute in class file %s", - signature_index, CHECK); - set_class_generic_signature_index(signature_index); -} - -void ClassFileParser::parse_classfile_bootstrap_methods_attribute(u4 attribute_byte_length, TRAPS) { - ClassFileStream* cfs = stream(); - u1* current_start = cfs->current(); - - guarantee_property(attribute_byte_length >= sizeof(u2), - "Invalid BootstrapMethods attribute length %u in class file %s", - attribute_byte_length, - CHECK); - - cfs->guarantee_more(attribute_byte_length, CHECK); - - int attribute_array_length = cfs->get_u2_fast(); - - guarantee_property(_max_bootstrap_specifier_index < attribute_array_length, - "Short length on BootstrapMethods in class file %s", - CHECK); - - - // The attribute contains a counted array of counted tuples of shorts, - // represending bootstrap specifiers: - // length*{bootstrap_method_index, argument_count*{argument_index}} - int operand_count = (attribute_byte_length - sizeof(u2)) / sizeof(u2); - // operand_count = number of shorts in attr, except for leading length - - // The attribute is copied into a short[] array. - // The array begins with a series of short[2] pairs, one for each tuple. - int index_size = (attribute_array_length * 2); - - Array* operands = MetadataFactory::new_array(_loader_data, index_size + operand_count, CHECK); - - // Eagerly assign operands so they will be deallocated with the constant - // pool if there is an error. - _cp->set_operands(operands); - - int operand_fill_index = index_size; - int cp_size = _cp->length(); - - for (int n = 0; n < attribute_array_length; n++) { - // Store a 32-bit offset into the header of the operand array. - ConstantPool::operand_offset_at_put(operands, n, operand_fill_index); - - // Read a bootstrap specifier. - cfs->guarantee_more(sizeof(u2) * 2, CHECK); // bsm, argc - u2 bootstrap_method_index = cfs->get_u2_fast(); - u2 argument_count = cfs->get_u2_fast(); - check_property( - valid_cp_range(bootstrap_method_index, cp_size) && - _cp->tag_at(bootstrap_method_index).is_method_handle(), - "bootstrap_method_index %u has bad constant type in class file %s", - bootstrap_method_index, - CHECK); - - guarantee_property((operand_fill_index + 1 + argument_count) < operands->length(), - "Invalid BootstrapMethods num_bootstrap_methods or num_bootstrap_arguments value in class file %s", - CHECK); - - operands->at_put(operand_fill_index++, bootstrap_method_index); - operands->at_put(operand_fill_index++, argument_count); - - cfs->guarantee_more(sizeof(u2) * argument_count, CHECK); // argv[argc] - for (int j = 0; j < argument_count; j++) { - u2 argument_index = cfs->get_u2_fast(); - check_property( - valid_cp_range(argument_index, cp_size) && - _cp->tag_at(argument_index).is_loadable_constant(), - "argument_index %u has bad constant type in class file %s", - argument_index, - CHECK); - operands->at_put(operand_fill_index++, argument_index); - } - } - - u1* current_end = cfs->current(); - guarantee_property(current_end == current_start + attribute_byte_length, - "Bad length on BootstrapMethods in class file %s", - CHECK); -} - -void ClassFileParser::parse_classfile_attributes(ClassFileParser::ClassAnnotationCollector* parsed_annotations, - TRAPS) { - ClassFileStream* cfs = stream(); - // Set inner classes attribute to default sentinel - _inner_classes = Universe::the_empty_short_array(); - cfs->guarantee_more(2, CHECK); // attributes_count - u2 attributes_count = cfs->get_u2_fast(); - bool parsed_sourcefile_attribute = false; - bool parsed_innerclasses_attribute = false; - bool parsed_enclosingmethod_attribute = false; - bool parsed_bootstrap_methods_attribute = false; - u1* runtime_visible_annotations = NULL; - int runtime_visible_annotations_length = 0; - u1* runtime_invisible_annotations = NULL; - int runtime_invisible_annotations_length = 0; - u1* runtime_visible_type_annotations = NULL; - int runtime_visible_type_annotations_length = 0; - u1* runtime_invisible_type_annotations = NULL; - int runtime_invisible_type_annotations_length = 0; - bool runtime_invisible_type_annotations_exists = false; - bool runtime_invisible_annotations_exists = false; - bool parsed_source_debug_ext_annotations_exist = false; - u1* inner_classes_attribute_start = NULL; - u4 inner_classes_attribute_length = 0; - u2 enclosing_method_class_index = 0; - u2 enclosing_method_method_index = 0; - // Iterate over attributes - while (attributes_count--) { - cfs->guarantee_more(6, CHECK); // attribute_name_index, attribute_length - u2 attribute_name_index = cfs->get_u2_fast(); - u4 attribute_length = cfs->get_u4_fast(); - check_property( - valid_symbol_at(attribute_name_index), - "Attribute name has bad constant pool index %u in class file %s", - attribute_name_index, CHECK); - Symbol* tag = _cp->symbol_at(attribute_name_index); - if (tag == vmSymbols::tag_source_file()) { - // Check for SourceFile tag - if (_need_verify) { - guarantee_property(attribute_length == 2, "Wrong SourceFile attribute length in class file %s", CHECK); - } - if (parsed_sourcefile_attribute) { - classfile_parse_error("Multiple SourceFile attributes in class file %s", CHECK); - } else { - parsed_sourcefile_attribute = true; - } - parse_classfile_sourcefile_attribute(CHECK); - } else if (tag == vmSymbols::tag_source_debug_extension()) { - // Check for SourceDebugExtension tag - if (parsed_source_debug_ext_annotations_exist) { - classfile_parse_error( - "Multiple SourceDebugExtension attributes in class file %s", CHECK); - } - parsed_source_debug_ext_annotations_exist = true; - parse_classfile_source_debug_extension_attribute((int)attribute_length, CHECK); - } else if (tag == vmSymbols::tag_inner_classes()) { - // Check for InnerClasses tag - if (parsed_innerclasses_attribute) { - classfile_parse_error("Multiple InnerClasses attributes in class file %s", CHECK); - } else { - parsed_innerclasses_attribute = true; - } - inner_classes_attribute_start = cfs->get_u1_buffer(); - inner_classes_attribute_length = attribute_length; - cfs->skip_u1(inner_classes_attribute_length, CHECK); - } else if (tag == vmSymbols::tag_synthetic()) { - // Check for Synthetic tag - // Shouldn't we check that the synthetic flags wasn't already set? - not required in spec - if (attribute_length != 0) { - classfile_parse_error( - "Invalid Synthetic classfile attribute length %u in class file %s", - attribute_length, CHECK); - } - parse_classfile_synthetic_attribute(CHECK); - } else if (tag == vmSymbols::tag_deprecated()) { - // Check for Deprecatd tag - 4276120 - if (attribute_length != 0) { - classfile_parse_error( - "Invalid Deprecated classfile attribute length %u in class file %s", - attribute_length, CHECK); - } - } else if (_major_version >= JAVA_1_5_VERSION) { - if (tag == vmSymbols::tag_signature()) { - if (attribute_length != 2) { - classfile_parse_error( - "Wrong Signature attribute length %u in class file %s", - attribute_length, CHECK); - } - parse_classfile_signature_attribute(CHECK); - } else if (tag == vmSymbols::tag_runtime_visible_annotations()) { - if (runtime_visible_annotations != NULL) { - classfile_parse_error( - "Multiple RuntimeVisibleAnnotations attributes in class file %s", CHECK); - } - runtime_visible_annotations_length = attribute_length; - runtime_visible_annotations = cfs->get_u1_buffer(); - assert(runtime_visible_annotations != NULL, "null visible annotations"); - parse_annotations(runtime_visible_annotations, - runtime_visible_annotations_length, - parsed_annotations, - CHECK); - cfs->skip_u1(runtime_visible_annotations_length, CHECK); - } else if (tag == vmSymbols::tag_runtime_invisible_annotations()) { - if (runtime_invisible_annotations_exists) { - classfile_parse_error( - "Multiple RuntimeInvisibleAnnotations attributes in class file %s", CHECK); - } - runtime_invisible_annotations_exists = true; - if (PreserveAllAnnotations) { - runtime_invisible_annotations_length = attribute_length; - runtime_invisible_annotations = cfs->get_u1_buffer(); - assert(runtime_invisible_annotations != NULL, "null invisible annotations"); - } - cfs->skip_u1(attribute_length, CHECK); - } else if (tag == vmSymbols::tag_enclosing_method()) { - if (parsed_enclosingmethod_attribute) { - classfile_parse_error("Multiple EnclosingMethod attributes in class file %s", CHECK); - } else { - parsed_enclosingmethod_attribute = true; - } - guarantee_property(attribute_length == 4, - "Wrong EnclosingMethod attribute length %u in class file %s", - attribute_length, CHECK); - cfs->guarantee_more(4, CHECK); // class_index, method_index - enclosing_method_class_index = cfs->get_u2_fast(); - enclosing_method_method_index = cfs->get_u2_fast(); - if (enclosing_method_class_index == 0) { - classfile_parse_error("Invalid class index in EnclosingMethod attribute in class file %s", CHECK); - } - // Validate the constant pool indices and types - check_property(valid_klass_reference_at(enclosing_method_class_index), - "Invalid or out-of-bounds class index in EnclosingMethod attribute in class file %s", CHECK); - if (enclosing_method_method_index != 0 && - (!_cp->is_within_bounds(enclosing_method_method_index) || - !_cp->tag_at(enclosing_method_method_index).is_name_and_type())) { - classfile_parse_error("Invalid or out-of-bounds method index in EnclosingMethod attribute in class file %s", CHECK); - } - } else if (tag == vmSymbols::tag_bootstrap_methods() && - _major_version >= Verifier::INVOKEDYNAMIC_MAJOR_VERSION) { - if (parsed_bootstrap_methods_attribute) - classfile_parse_error("Multiple BootstrapMethods attributes in class file %s", CHECK); - parsed_bootstrap_methods_attribute = true; - parse_classfile_bootstrap_methods_attribute(attribute_length, CHECK); - } else if (tag == vmSymbols::tag_runtime_visible_type_annotations()) { - if (runtime_visible_type_annotations != NULL) { - classfile_parse_error( - "Multiple RuntimeVisibleTypeAnnotations attributes in class file %s", CHECK); - } - runtime_visible_type_annotations_length = attribute_length; - runtime_visible_type_annotations = cfs->get_u1_buffer(); - assert(runtime_visible_type_annotations != NULL, "null visible type annotations"); - // No need for the VM to parse Type annotations - cfs->skip_u1(runtime_visible_type_annotations_length, CHECK); - } else if (tag == vmSymbols::tag_runtime_invisible_type_annotations()) { - if (runtime_invisible_type_annotations_exists) { - classfile_parse_error( - "Multiple RuntimeInvisibleTypeAnnotations attributes in class file %s", CHECK); - } else { - runtime_invisible_type_annotations_exists = true; - } - if (PreserveAllAnnotations) { - runtime_invisible_type_annotations_length = attribute_length; - runtime_invisible_type_annotations = cfs->get_u1_buffer(); - assert(runtime_invisible_type_annotations != NULL, "null invisible type annotations"); - } - cfs->skip_u1(attribute_length, CHECK); - } else { - // Unknown attribute - cfs->skip_u1(attribute_length, CHECK); - } - } else { - // Unknown attribute - cfs->skip_u1(attribute_length, CHECK); - } - } - _annotations = assemble_annotations(runtime_visible_annotations, - runtime_visible_annotations_length, - runtime_invisible_annotations, - runtime_invisible_annotations_length, - CHECK); - _type_annotations = assemble_annotations(runtime_visible_type_annotations, - runtime_visible_type_annotations_length, - runtime_invisible_type_annotations, - runtime_invisible_type_annotations_length, - CHECK); - - if (parsed_innerclasses_attribute || parsed_enclosingmethod_attribute) { - u2 num_of_classes = parse_classfile_inner_classes_attribute( - inner_classes_attribute_start, - parsed_innerclasses_attribute, - enclosing_method_class_index, - enclosing_method_method_index, - CHECK); - if (parsed_innerclasses_attribute &&_need_verify && _major_version >= JAVA_1_5_VERSION) { - guarantee_property( - inner_classes_attribute_length == sizeof(num_of_classes) + 4 * sizeof(u2) * num_of_classes, - "Wrong InnerClasses attribute length in class file %s", CHECK); - } - } - - if (_max_bootstrap_specifier_index >= 0) { - guarantee_property(parsed_bootstrap_methods_attribute, - "Missing BootstrapMethods attribute in class file %s", CHECK); - } -} - -void ClassFileParser::apply_parsed_class_attributes(instanceKlassHandle k) { - if (_synthetic_flag) - k->set_is_synthetic(); - if (_sourcefile_index != 0) { - k->set_source_file_name_index(_sourcefile_index); - } - if (_generic_signature_index != 0) { - k->set_generic_signature_index(_generic_signature_index); - } - if (_sde_buffer != NULL) { - k->set_source_debug_extension(_sde_buffer, _sde_length); - } -} - -// Transfer ownership of metadata allocated to the InstanceKlass. -void ClassFileParser::apply_parsed_class_metadata( - instanceKlassHandle this_klass, - int java_fields_count, TRAPS) { - // Assign annotations if needed - if (_annotations != NULL || _type_annotations != NULL || - _fields_annotations != NULL || _fields_type_annotations != NULL) { - Annotations* annotations = Annotations::allocate(_loader_data, CHECK); - annotations->set_class_annotations(_annotations); - annotations->set_class_type_annotations(_type_annotations); - annotations->set_fields_annotations(_fields_annotations); - annotations->set_fields_type_annotations(_fields_type_annotations); - this_klass->set_annotations(annotations); - } - - _cp->set_pool_holder(this_klass()); - this_klass->set_constants(_cp); - this_klass->set_fields(_fields, java_fields_count); - this_klass->set_methods(_methods); - this_klass->set_inner_classes(_inner_classes); - this_klass->set_local_interfaces(_local_interfaces); - this_klass->set_transitive_interfaces(_transitive_interfaces); - - // Clear out these fields so they don't get deallocated by the destructor - clear_class_metadata(); -} - -AnnotationArray* ClassFileParser::assemble_annotations(u1* runtime_visible_annotations, - int runtime_visible_annotations_length, - u1* runtime_invisible_annotations, - int runtime_invisible_annotations_length, TRAPS) { - AnnotationArray* annotations = NULL; - if (runtime_visible_annotations != NULL || - runtime_invisible_annotations != NULL) { - annotations = MetadataFactory::new_array(_loader_data, - runtime_visible_annotations_length + - runtime_invisible_annotations_length, - CHECK_(annotations)); - if (runtime_visible_annotations != NULL) { - for (int i = 0; i < runtime_visible_annotations_length; i++) { - annotations->at_put(i, runtime_visible_annotations[i]); - } - } - if (runtime_invisible_annotations != NULL) { - for (int i = 0; i < runtime_invisible_annotations_length; i++) { - int append = runtime_visible_annotations_length+i; - annotations->at_put(append, runtime_invisible_annotations[i]); - } - } - } - return annotations; -} - -instanceKlassHandle ClassFileParser::parse_super_class(int super_class_index, - TRAPS) { - instanceKlassHandle super_klass; - if (super_class_index == 0) { - check_property(_class_name == vmSymbols::java_lang_Object(), - "Invalid superclass index %u in class file %s", - super_class_index, - CHECK_NULL); - } else { - check_property(valid_klass_reference_at(super_class_index), - "Invalid superclass index %u in class file %s", - super_class_index, - CHECK_NULL); - // The class name should be legal because it is checked when parsing constant pool. - // However, make sure it is not an array type. - bool is_array = false; - if (_cp->tag_at(super_class_index).is_klass()) { - super_klass = instanceKlassHandle(THREAD, _cp->resolved_klass_at(super_class_index)); - if (_need_verify) - is_array = super_klass->oop_is_array(); - } else if (_need_verify) { - is_array = (_cp->klass_name_at(super_class_index)->byte_at(0) == JVM_SIGNATURE_ARRAY); - } - if (_need_verify) { - guarantee_property(!is_array, - "Bad superclass name in class file %s", CHECK_NULL); - } - } - return super_klass; -} - - -// Values needed for oopmap and InstanceKlass creation -class FieldLayoutInfo : public StackObj { - public: - int* nonstatic_oop_offsets; - unsigned int* nonstatic_oop_counts; - unsigned int nonstatic_oop_map_count; - unsigned int total_oop_map_count; - int instance_size; - int nonstatic_field_size; - int static_field_size; - bool has_nonstatic_fields; -}; - -// Layout fields and fill in FieldLayoutInfo. Could use more refactoring! -void ClassFileParser::layout_fields(Handle class_loader, - FieldAllocationCount* fac, - ClassAnnotationCollector* parsed_annotations, - FieldLayoutInfo* info, - TRAPS) { - - // Field size and offset computation - int nonstatic_field_size = _super_klass() == NULL ? 0 : _super_klass()->nonstatic_field_size(); - int next_static_oop_offset; - int next_static_double_offset; - int next_static_word_offset; - int next_static_short_offset; - int next_static_byte_offset; - int next_nonstatic_oop_offset; - int next_nonstatic_double_offset; - int next_nonstatic_word_offset; - int next_nonstatic_short_offset; - int next_nonstatic_byte_offset; - int first_nonstatic_oop_offset; - int next_nonstatic_field_offset; - int next_nonstatic_padded_offset; - - // Count the contended fields by type. - // - // We ignore static fields, because @Contended is not supported for them. - // The layout code below will also ignore the static fields. - int nonstatic_contended_count = 0; - FieldAllocationCount fac_contended; - for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) { - FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); - if (fs.is_contended()) { - fac_contended.count[atype]++; - if (!fs.access_flags().is_static()) { - nonstatic_contended_count++; - } - } - } - - - // Calculate the starting byte offsets - next_static_oop_offset = InstanceMirrorKlass::offset_of_static_fields(); - next_static_double_offset = next_static_oop_offset + - ((fac->count[STATIC_OOP]) * heapOopSize); - if ( fac->count[STATIC_DOUBLE] && - (Universe::field_type_should_be_aligned(T_DOUBLE) || - Universe::field_type_should_be_aligned(T_LONG)) ) { - next_static_double_offset = align_size_up(next_static_double_offset, BytesPerLong); - } - - next_static_word_offset = next_static_double_offset + - ((fac->count[STATIC_DOUBLE]) * BytesPerLong); - next_static_short_offset = next_static_word_offset + - ((fac->count[STATIC_WORD]) * BytesPerInt); - next_static_byte_offset = next_static_short_offset + - ((fac->count[STATIC_SHORT]) * BytesPerShort); - - int nonstatic_fields_start = instanceOopDesc::base_offset_in_bytes() + - nonstatic_field_size * heapOopSize; - - next_nonstatic_field_offset = nonstatic_fields_start; - - bool is_contended_class = parsed_annotations->is_contended(); - - // Class is contended, pad before all the fields - if (is_contended_class) { - next_nonstatic_field_offset += ContendedPaddingWidth; - } - - // Compute the non-contended fields count. - // The packing code below relies on these counts to determine if some field - // can be squeezed into the alignment gap. Contended fields are obviously - // exempt from that. - unsigned int nonstatic_double_count = fac->count[NONSTATIC_DOUBLE] - fac_contended.count[NONSTATIC_DOUBLE]; - unsigned int nonstatic_word_count = fac->count[NONSTATIC_WORD] - fac_contended.count[NONSTATIC_WORD]; - unsigned int nonstatic_short_count = fac->count[NONSTATIC_SHORT] - fac_contended.count[NONSTATIC_SHORT]; - unsigned int nonstatic_byte_count = fac->count[NONSTATIC_BYTE] - fac_contended.count[NONSTATIC_BYTE]; - unsigned int nonstatic_oop_count = fac->count[NONSTATIC_OOP] - fac_contended.count[NONSTATIC_OOP]; - - // Total non-static fields count, including every contended field - unsigned int nonstatic_fields_count = fac->count[NONSTATIC_DOUBLE] + fac->count[NONSTATIC_WORD] + - fac->count[NONSTATIC_SHORT] + fac->count[NONSTATIC_BYTE] + - fac->count[NONSTATIC_OOP]; - - bool super_has_nonstatic_fields = - (_super_klass() != NULL && _super_klass->has_nonstatic_fields()); - bool has_nonstatic_fields = super_has_nonstatic_fields || (nonstatic_fields_count != 0); - - - // Prepare list of oops for oop map generation. - // - // "offset" and "count" lists are describing the set of contiguous oop - // regions. offset[i] is the start of the i-th region, which then has - // count[i] oops following. Before we know how many regions are required, - // we pessimistically allocate the maps to fit all the oops into the - // distinct regions. - // - // TODO: We add +1 to always allocate non-zero resource arrays; we need - // to figure out if we still need to do this. - int* nonstatic_oop_offsets; - unsigned int* nonstatic_oop_counts; - unsigned int nonstatic_oop_map_count = 0; - unsigned int max_nonstatic_oop_maps = fac->count[NONSTATIC_OOP] + 1; - - nonstatic_oop_offsets = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, int, max_nonstatic_oop_maps); - nonstatic_oop_counts = NEW_RESOURCE_ARRAY_IN_THREAD( - THREAD, unsigned int, max_nonstatic_oop_maps); - - first_nonstatic_oop_offset = 0; // will be set for first oop field - - bool compact_fields = CompactFields; - int allocation_style = FieldsAllocationStyle; - if( allocation_style < 0 || allocation_style > 2 ) { // Out of range? - assert(false, "0 <= FieldsAllocationStyle <= 2"); - allocation_style = 1; // Optimistic - } - - // The next classes have predefined hard-coded fields offsets - // (see in JavaClasses::compute_hard_coded_offsets()). - // Use default fields allocation order for them. - if( (allocation_style != 0 || compact_fields ) && class_loader.is_null() && - (_class_name == vmSymbols::java_lang_AssertionStatusDirectives() || - _class_name == vmSymbols::java_lang_Class() || - _class_name == vmSymbols::java_lang_ClassLoader() || - _class_name == vmSymbols::java_lang_ref_Reference() || - _class_name == vmSymbols::java_lang_ref_SoftReference() || - _class_name == vmSymbols::java_lang_StackTraceElement() || - _class_name == vmSymbols::java_lang_String() || - _class_name == vmSymbols::java_lang_Throwable() || - _class_name == vmSymbols::java_lang_Boolean() || - _class_name == vmSymbols::java_lang_Character() || - _class_name == vmSymbols::java_lang_Float() || - _class_name == vmSymbols::java_lang_Double() || - _class_name == vmSymbols::java_lang_Byte() || - _class_name == vmSymbols::java_lang_Short() || - _class_name == vmSymbols::java_lang_Integer() || - _class_name == vmSymbols::java_lang_Long())) { - allocation_style = 0; // Allocate oops first - compact_fields = false; // Don't compact fields - } - - // Rearrange fields for a given allocation style - if( allocation_style == 0 ) { - // Fields order: oops, longs/doubles, ints, shorts/chars, bytes, padded fields - next_nonstatic_oop_offset = next_nonstatic_field_offset; - next_nonstatic_double_offset = next_nonstatic_oop_offset + - (nonstatic_oop_count * heapOopSize); - } else if( allocation_style == 1 ) { - // Fields order: longs/doubles, ints, shorts/chars, bytes, oops, padded fields - next_nonstatic_double_offset = next_nonstatic_field_offset; - } else if( allocation_style == 2 ) { - // Fields allocation: oops fields in super and sub classes are together. - if( nonstatic_field_size > 0 && _super_klass() != NULL && - _super_klass->nonstatic_oop_map_size() > 0 ) { - unsigned int map_count = _super_klass->nonstatic_oop_map_count(); - OopMapBlock* first_map = _super_klass->start_of_nonstatic_oop_maps(); - OopMapBlock* last_map = first_map + map_count - 1; - int next_offset = last_map->offset() + (last_map->count() * heapOopSize); - if (next_offset == next_nonstatic_field_offset) { - allocation_style = 0; // allocate oops first - next_nonstatic_oop_offset = next_nonstatic_field_offset; - next_nonstatic_double_offset = next_nonstatic_oop_offset + - (nonstatic_oop_count * heapOopSize); - } - } - if( allocation_style == 2 ) { - allocation_style = 1; // allocate oops last - next_nonstatic_double_offset = next_nonstatic_field_offset; - } - } else { - ShouldNotReachHere(); - } - - int nonstatic_oop_space_count = 0; - int nonstatic_word_space_count = 0; - int nonstatic_short_space_count = 0; - int nonstatic_byte_space_count = 0; - int nonstatic_oop_space_offset; - int nonstatic_word_space_offset; - int nonstatic_short_space_offset; - int nonstatic_byte_space_offset; - - // Try to squeeze some of the fields into the gaps due to - // long/double alignment. - if( nonstatic_double_count > 0 ) { - int offset = next_nonstatic_double_offset; - next_nonstatic_double_offset = align_size_up(offset, BytesPerLong); - if( compact_fields && offset != next_nonstatic_double_offset ) { - // Allocate available fields into the gap before double field. - int length = next_nonstatic_double_offset - offset; - assert(length == BytesPerInt, ""); - nonstatic_word_space_offset = offset; - if( nonstatic_word_count > 0 ) { - nonstatic_word_count -= 1; - nonstatic_word_space_count = 1; // Only one will fit - length -= BytesPerInt; - offset += BytesPerInt; - } - nonstatic_short_space_offset = offset; - while( length >= BytesPerShort && nonstatic_short_count > 0 ) { - nonstatic_short_count -= 1; - nonstatic_short_space_count += 1; - length -= BytesPerShort; - offset += BytesPerShort; - } - nonstatic_byte_space_offset = offset; - while( length > 0 && nonstatic_byte_count > 0 ) { - nonstatic_byte_count -= 1; - nonstatic_byte_space_count += 1; - length -= 1; - } - // Allocate oop field in the gap if there are no other fields for that. - nonstatic_oop_space_offset = offset; - if( length >= heapOopSize && nonstatic_oop_count > 0 && - allocation_style != 0 ) { // when oop fields not first - nonstatic_oop_count -= 1; - nonstatic_oop_space_count = 1; // Only one will fit - length -= heapOopSize; - offset += heapOopSize; - } - } - } - - next_nonstatic_word_offset = next_nonstatic_double_offset + - (nonstatic_double_count * BytesPerLong); - next_nonstatic_short_offset = next_nonstatic_word_offset + - (nonstatic_word_count * BytesPerInt); - next_nonstatic_byte_offset = next_nonstatic_short_offset + - (nonstatic_short_count * BytesPerShort); - next_nonstatic_padded_offset = next_nonstatic_byte_offset + - nonstatic_byte_count; - - // let oops jump before padding with this allocation style - if( allocation_style == 1 ) { - next_nonstatic_oop_offset = next_nonstatic_padded_offset; - if( nonstatic_oop_count > 0 ) { - next_nonstatic_oop_offset = align_size_up(next_nonstatic_oop_offset, heapOopSize); - } - next_nonstatic_padded_offset = next_nonstatic_oop_offset + (nonstatic_oop_count * heapOopSize); - } - - // Iterate over fields again and compute correct offsets. - // The field allocation type was temporarily stored in the offset slot. - // oop fields are located before non-oop fields (static and non-static). - for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) { - - // skip already laid out fields - if (fs.is_offset_set()) continue; - - // contended instance fields are handled below - if (fs.is_contended() && !fs.access_flags().is_static()) continue; - - int real_offset; - FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); - - // pack the rest of the fields - switch (atype) { - case STATIC_OOP: - real_offset = next_static_oop_offset; - next_static_oop_offset += heapOopSize; - break; - case STATIC_BYTE: - real_offset = next_static_byte_offset; - next_static_byte_offset += 1; - break; - case STATIC_SHORT: - real_offset = next_static_short_offset; - next_static_short_offset += BytesPerShort; - break; - case STATIC_WORD: - real_offset = next_static_word_offset; - next_static_word_offset += BytesPerInt; - break; - case STATIC_DOUBLE: - real_offset = next_static_double_offset; - next_static_double_offset += BytesPerLong; - break; - case NONSTATIC_OOP: - if( nonstatic_oop_space_count > 0 ) { - real_offset = nonstatic_oop_space_offset; - nonstatic_oop_space_offset += heapOopSize; - nonstatic_oop_space_count -= 1; - } else { - real_offset = next_nonstatic_oop_offset; - next_nonstatic_oop_offset += heapOopSize; - } - // Update oop maps - if( nonstatic_oop_map_count > 0 && - nonstatic_oop_offsets[nonstatic_oop_map_count - 1] == - real_offset - - int(nonstatic_oop_counts[nonstatic_oop_map_count - 1]) * - heapOopSize ) { - // Extend current oop map - assert(nonstatic_oop_map_count - 1 < max_nonstatic_oop_maps, "range check"); - nonstatic_oop_counts[nonstatic_oop_map_count - 1] += 1; - } else { - // Create new oop map - assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); - nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; - nonstatic_oop_counts [nonstatic_oop_map_count] = 1; - nonstatic_oop_map_count += 1; - if( first_nonstatic_oop_offset == 0 ) { // Undefined - first_nonstatic_oop_offset = real_offset; - } - } - break; - case NONSTATIC_BYTE: - if( nonstatic_byte_space_count > 0 ) { - real_offset = nonstatic_byte_space_offset; - nonstatic_byte_space_offset += 1; - nonstatic_byte_space_count -= 1; - } else { - real_offset = next_nonstatic_byte_offset; - next_nonstatic_byte_offset += 1; - } - break; - case NONSTATIC_SHORT: - if( nonstatic_short_space_count > 0 ) { - real_offset = nonstatic_short_space_offset; - nonstatic_short_space_offset += BytesPerShort; - nonstatic_short_space_count -= 1; - } else { - real_offset = next_nonstatic_short_offset; - next_nonstatic_short_offset += BytesPerShort; - } - break; - case NONSTATIC_WORD: - if( nonstatic_word_space_count > 0 ) { - real_offset = nonstatic_word_space_offset; - nonstatic_word_space_offset += BytesPerInt; - nonstatic_word_space_count -= 1; - } else { - real_offset = next_nonstatic_word_offset; - next_nonstatic_word_offset += BytesPerInt; - } - break; - case NONSTATIC_DOUBLE: - real_offset = next_nonstatic_double_offset; - next_nonstatic_double_offset += BytesPerLong; - break; - default: - ShouldNotReachHere(); - } - fs.set_offset(real_offset); - } - - - // Handle the contended cases. - // - // Each contended field should not intersect the cache line with another contended field. - // In the absence of alignment information, we end up with pessimistically separating - // the fields with full-width padding. - // - // Additionally, this should not break alignment for the fields, so we round the alignment up - // for each field. - if (nonstatic_contended_count > 0) { - - // if there is at least one contended field, we need to have pre-padding for them - next_nonstatic_padded_offset += ContendedPaddingWidth; - - // collect all contended groups - BitMap bm(_cp->size()); - for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) { - // skip already laid out fields - if (fs.is_offset_set()) continue; - - if (fs.is_contended()) { - bm.set_bit(fs.contended_group()); - } - } - - int current_group = -1; - while ((current_group = (int)bm.get_next_one_offset(current_group + 1)) != (int)bm.size()) { - - for (AllFieldStream fs(_fields, _cp); !fs.done(); fs.next()) { - - // skip already laid out fields - if (fs.is_offset_set()) continue; - - // skip non-contended fields and fields from different group - if (!fs.is_contended() || (fs.contended_group() != current_group)) continue; - - // handle statics below - if (fs.access_flags().is_static()) continue; - - int real_offset; - FieldAllocationType atype = (FieldAllocationType) fs.allocation_type(); - - switch (atype) { - case NONSTATIC_BYTE: - next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, 1); - real_offset = next_nonstatic_padded_offset; - next_nonstatic_padded_offset += 1; - break; - - case NONSTATIC_SHORT: - next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerShort); - real_offset = next_nonstatic_padded_offset; - next_nonstatic_padded_offset += BytesPerShort; - break; - - case NONSTATIC_WORD: - next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerInt); - real_offset = next_nonstatic_padded_offset; - next_nonstatic_padded_offset += BytesPerInt; - break; - - case NONSTATIC_DOUBLE: - next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, BytesPerLong); - real_offset = next_nonstatic_padded_offset; - next_nonstatic_padded_offset += BytesPerLong; - break; - - case NONSTATIC_OOP: - next_nonstatic_padded_offset = align_size_up(next_nonstatic_padded_offset, heapOopSize); - real_offset = next_nonstatic_padded_offset; - next_nonstatic_padded_offset += heapOopSize; - - // Create new oop map - assert(nonstatic_oop_map_count < max_nonstatic_oop_maps, "range check"); - nonstatic_oop_offsets[nonstatic_oop_map_count] = real_offset; - nonstatic_oop_counts [nonstatic_oop_map_count] = 1; - nonstatic_oop_map_count += 1; - if( first_nonstatic_oop_offset == 0 ) { // Undefined - first_nonstatic_oop_offset = real_offset; - } - break; - - default: - ShouldNotReachHere(); - } - - if (fs.contended_group() == 0) { - // Contended group defines the equivalence class over the fields: - // the fields within the same contended group are not inter-padded. - // The only exception is default group, which does not incur the - // equivalence, and so requires intra-padding. - next_nonstatic_padded_offset += ContendedPaddingWidth; - } - - fs.set_offset(real_offset); - } // for - - // Start laying out the next group. - // Note that this will effectively pad the last group in the back; - // this is expected to alleviate memory contention effects for - // subclass fields and/or adjacent object. - // If this was the default group, the padding is already in place. - if (current_group != 0) { - next_nonstatic_padded_offset += ContendedPaddingWidth; - } - } - - // handle static fields - } - - // Entire class is contended, pad in the back. - // This helps to alleviate memory contention effects for subclass fields - // and/or adjacent object. - if (is_contended_class) { - next_nonstatic_padded_offset += ContendedPaddingWidth; - } - - int notaligned_nonstatic_fields_end = next_nonstatic_padded_offset; - - int nonstatic_fields_end = align_size_up(notaligned_nonstatic_fields_end, heapOopSize); - int instance_end = align_size_up(notaligned_nonstatic_fields_end, wordSize); - int static_fields_end = align_size_up(next_static_byte_offset, wordSize); - - int static_field_size = (static_fields_end - - InstanceMirrorKlass::offset_of_static_fields()) / wordSize; - nonstatic_field_size = nonstatic_field_size + - (nonstatic_fields_end - nonstatic_fields_start) / heapOopSize; - - int instance_size = align_object_size(instance_end / wordSize); - - assert(instance_size == align_object_size(align_size_up( - (instanceOopDesc::base_offset_in_bytes() + nonstatic_field_size*heapOopSize), - wordSize) / wordSize), "consistent layout helper value"); - - // Invariant: nonstatic_field end/start should only change if there are - // nonstatic fields in the class, or if the class is contended. We compare - // against the non-aligned value, so that end alignment will not fail the - // assert without actually having the fields. - assert((notaligned_nonstatic_fields_end == nonstatic_fields_start) || - is_contended_class || - (nonstatic_fields_count > 0), "double-check nonstatic start/end"); - - // Number of non-static oop map blocks allocated at end of klass. - const unsigned int total_oop_map_count = - compute_oop_map_count(_super_klass, nonstatic_oop_map_count, - first_nonstatic_oop_offset); - -#ifndef PRODUCT - if (PrintFieldLayout) { - print_field_layout(_class_name, - _fields, - _cp, - instance_size, - nonstatic_fields_start, - nonstatic_fields_end, - static_fields_end); - } - -#endif - // Pass back information needed for InstanceKlass creation - info->nonstatic_oop_offsets = nonstatic_oop_offsets; - info->nonstatic_oop_counts = nonstatic_oop_counts; - info->nonstatic_oop_map_count = nonstatic_oop_map_count; - info->total_oop_map_count = total_oop_map_count; - info->instance_size = instance_size; - info->static_field_size = static_field_size; - info->nonstatic_field_size = nonstatic_field_size; - info->has_nonstatic_fields = has_nonstatic_fields; -} - - -instanceKlassHandle ClassFileParser::parseClassFile(Symbol* name, - ClassLoaderData* loader_data, - Handle protection_domain, - KlassHandle host_klass, - GrowableArray* cp_patches, - TempNewSymbol& parsed_name, - bool verify, - TRAPS) { - - // When a retransformable agent is attached, JVMTI caches the - // class bytes that existed before the first retransformation. - // If RedefineClasses() was used before the retransformable - // agent attached, then the cached class bytes may not be the - // original class bytes. - JvmtiCachedClassFileData *cached_class_file = NULL; - Handle class_loader(THREAD, loader_data->class_loader()); - bool has_default_methods = false; - ResourceMark rm(THREAD); - - ClassFileStream* cfs = stream(); - // Timing - assert(THREAD->is_Java_thread(), "must be a JavaThread"); - JavaThread* jt = (JavaThread*) THREAD; - - PerfClassTraceTime ctimer(ClassLoader::perf_class_parse_time(), - ClassLoader::perf_class_parse_selftime(), - NULL, - jt->get_thread_stat()->perf_recursion_counts_addr(), - jt->get_thread_stat()->perf_timers_addr(), - PerfClassTraceTime::PARSE_CLASS); - - init_parsed_class_attributes(loader_data); - - if (JvmtiExport::should_post_class_file_load_hook()) { - // Get the cached class file bytes (if any) from the class that - // is being redefined or retransformed. We use jvmti_thread_state() - // instead of JvmtiThreadState::state_for(jt) so we don't allocate - // a JvmtiThreadState any earlier than necessary. This will help - // avoid the bug described by 7126851. - JvmtiThreadState *state = jt->jvmti_thread_state(); - if (state != NULL) { - KlassHandle *h_class_being_redefined = - state->get_class_being_redefined(); - if (h_class_being_redefined != NULL) { - instanceKlassHandle ikh_class_being_redefined = - instanceKlassHandle(THREAD, (*h_class_being_redefined)()); - cached_class_file = ikh_class_being_redefined->get_cached_class_file(); - } - } - - unsigned char* ptr = cfs->buffer(); - unsigned char* end_ptr = cfs->buffer() + cfs->length(); - - JvmtiExport::post_class_file_load_hook(name, class_loader(), protection_domain, - &ptr, &end_ptr, &cached_class_file); - - if (ptr != cfs->buffer()) { - // JVMTI agent has modified class file data. - // Set new class file stream using JVMTI agent modified - // class file data. - cfs = new ClassFileStream(ptr, end_ptr - ptr, cfs->source()); - set_stream(cfs); - } - } - - _host_klass = host_klass; - _cp_patches = cp_patches; - - instanceKlassHandle nullHandle; - - // Figure out whether we can skip format checking (matching classic VM behavior) - if (DumpSharedSpaces) { - // verify == true means it's a 'remote' class (i.e., non-boot class) - // Verification decision is based on BytecodeVerificationRemote flag - // for those classes. - _need_verify = (verify) ? BytecodeVerificationRemote : - BytecodeVerificationLocal; - } else { - _need_verify = Verifier::should_verify_for(class_loader(), verify); - } - - // Set the verify flag in stream - cfs->set_verify(_need_verify); - - // Save the class file name for easier error message printing. - _class_name = (name != NULL) ? name : vmSymbols::unknown_class_name(); - - cfs->guarantee_more(8, CHECK_(nullHandle)); // magic, major, minor - // Magic value - u4 magic = cfs->get_u4_fast(); - guarantee_property(magic == JAVA_CLASSFILE_MAGIC, - "Incompatible magic value %u in class file %s", - magic, CHECK_(nullHandle)); - - // Version numbers - u2 minor_version = cfs->get_u2_fast(); - u2 major_version = cfs->get_u2_fast(); - - if (DumpSharedSpaces && major_version < JAVA_1_5_VERSION) { - ResourceMark rm; - warning("Pre JDK 1.5 class not supported by CDS: %u.%u %s", - major_version, minor_version, name->as_C_string()); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_UnsupportedClassVersionError(), - "Unsupported major.minor version for dump time %u.%u", - major_version, - minor_version); - } - - // Check version numbers - we check this even with verifier off - if (!is_supported_version(major_version, minor_version)) { - if (name == NULL) { - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_UnsupportedClassVersionError(), - "Unsupported class file version %u.%u, " - "this version of the Java Runtime only recognizes class file versions up to %u.%u", - major_version, - minor_version, - JAVA_MAX_SUPPORTED_VERSION, - JAVA_MAX_SUPPORTED_MINOR_VERSION); - } else { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_UnsupportedClassVersionError(), - "%s has been compiled by a more recent version of the Java Runtime (class file version %u.%u), " - "this version of the Java Runtime only recognizes class file versions up to %u.%u", - name->as_C_string(), - major_version, - minor_version, - JAVA_MAX_SUPPORTED_VERSION, - JAVA_MAX_SUPPORTED_MINOR_VERSION); - } - return nullHandle; - } - - _major_version = major_version; - _minor_version = minor_version; - - - // Check if verification needs to be relaxed for this class file - // Do not restrict it to jdk1.0 or jdk1.1 to maintain backward compatibility (4982376) - _relax_verify = Verifier::relax_verify_for(class_loader()); - - // Constant pool - constantPoolHandle cp = parse_constant_pool(CHECK_(nullHandle)); - - int cp_size = cp->length(); - - cfs->guarantee_more(8, CHECK_(nullHandle)); // flags, this_class, super_class, infs_len - - // Access flags - AccessFlags access_flags; - jint flags = cfs->get_u2_fast() & JVM_RECOGNIZED_CLASS_MODIFIERS; - - if ((flags & JVM_ACC_INTERFACE) && _major_version < JAVA_6_VERSION) { - // Set abstract bit for old class files for backward compatibility - flags |= JVM_ACC_ABSTRACT; - } - verify_legal_class_modifiers(flags, CHECK_(nullHandle)); - access_flags.set_flags(flags); - - // This class and superclass - u2 this_class_index = cfs->get_u2_fast(); - check_property( - valid_cp_range(this_class_index, cp_size) && - cp->tag_at(this_class_index).is_unresolved_klass(), - "Invalid this class index %u in constant pool in class file %s", - this_class_index, CHECK_(nullHandle)); - - Symbol* class_name = cp->klass_name_at(this_class_index); - assert(class_name != NULL, "class_name can't be null"); - - // It's important to set parsed_name *before* resolving the super class. - // (it's used for cleanup by the caller if parsing fails) - parsed_name = class_name; - // parsed_name is returned and can be used if there's an error, so add to - // its reference count. Caller will decrement the refcount. - parsed_name->increment_refcount(); - - // Update _class_name which could be null previously to be class_name - _class_name = class_name; - - // Don't need to check whether this class name is legal or not. - // It has been checked when constant pool is parsed. - // However, make sure it is not an array type. - if (_need_verify) { - guarantee_property(class_name->byte_at(0) != JVM_SIGNATURE_ARRAY, - "Bad class name in class file %s", - CHECK_(nullHandle)); - } - - Klass* preserve_this_klass; // for storing result across HandleMark - - // release all handles when parsing is done - { HandleMark hm(THREAD); - - // Checks if name in class file matches requested name - if (name != NULL && class_name != name) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_NoClassDefFoundError(), - "%s (wrong name: %s)", - name->as_C_string(), - class_name->as_C_string() - ); - return nullHandle; - } - - if (TraceClassLoadingPreorder) { - tty->print("[Loading %s", (name != NULL) ? name->as_klass_external_name() : "NoName"); - if (cfs->source() != NULL) tty->print(" from %s", cfs->source()); - tty->print_cr("]"); - } -#if INCLUDE_CDS - if (DumpLoadedClassList != NULL && cfs->source() != NULL && classlist_file->is_open()) { - // Only dump the classes that can be stored into CDS archive - if (SystemDictionaryShared::is_sharing_possible(loader_data)) { - if (name != NULL) { - ResourceMark rm(THREAD); - classlist_file->print_cr("%s", name->as_C_string()); - classlist_file->flush(); - } - } - } -#endif - - u2 super_class_index = cfs->get_u2_fast(); - instanceKlassHandle super_klass = parse_super_class(super_class_index, - CHECK_NULL); - - // Interfaces - u2 itfs_len = cfs->get_u2_fast(); - Array* local_interfaces = - parse_interfaces(itfs_len, protection_domain, _class_name, - &has_default_methods, CHECK_(nullHandle)); - - u2 java_fields_count = 0; - // Fields (offsets are filled in later) - FieldAllocationCount fac; - Array* fields = parse_fields(class_name, - access_flags.is_interface(), - &fac, &java_fields_count, - CHECK_(nullHandle)); - // Methods - bool has_final_method = false; - AccessFlags promoted_flags; - promoted_flags.set_flags(0); - Array* methods = parse_methods(access_flags.is_interface(), - &promoted_flags, - &has_final_method, - &has_default_methods, - CHECK_(nullHandle)); - - // Additional attributes - ClassAnnotationCollector parsed_annotations; - parse_classfile_attributes(&parsed_annotations, CHECK_(nullHandle)); - - // Make sure this is the end of class file stream - guarantee_property(cfs->at_eos(), "Extra bytes at the end of class file %s", CHECK_(nullHandle)); - - // We check super class after class file is parsed and format is checked - if (super_class_index > 0 && super_klass.is_null()) { - Symbol* sk = cp->klass_name_at(super_class_index); - if (access_flags.is_interface()) { - // Before attempting to resolve the superclass, check for class format - // errors not checked yet. - guarantee_property(sk == vmSymbols::java_lang_Object(), - "Interfaces must have java.lang.Object as superclass in class file %s", - CHECK_(nullHandle)); - } - Klass* k = SystemDictionary::resolve_super_or_fail(class_name, sk, - class_loader, - protection_domain, - true, - CHECK_(nullHandle)); - - KlassHandle kh (THREAD, k); - super_klass = instanceKlassHandle(THREAD, kh()); - } - if (super_klass.not_null()) { - - if (super_klass->has_default_methods()) { - has_default_methods = true; - } - - if (super_klass->is_interface()) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_IncompatibleClassChangeError(), - "class %s has interface %s as super class", - class_name->as_klass_external_name(), - super_klass->external_name() - ); - return nullHandle; - } - // Make sure super class is not final - if (super_klass->is_final()) { - THROW_MSG_(vmSymbols::java_lang_VerifyError(), "Cannot inherit from final class", nullHandle); - } - } - - // save super klass for error handling. - _super_klass = super_klass; - - // Compute the transitive list of all unique interfaces implemented by this class - _transitive_interfaces = - compute_transitive_interfaces(super_klass, local_interfaces, CHECK_(nullHandle)); - - // sort methods - intArray* method_ordering = sort_methods(methods); - - // promote flags from parse_methods() to the klass' flags - access_flags.add_promoted_flags(promoted_flags.as_int()); - - // Size of Java vtable (in words) - int vtable_size = 0; - int itable_size = 0; - int num_miranda_methods = 0; - - GrowableArray all_mirandas(20); - - klassVtable::compute_vtable_size_and_num_mirandas( - &vtable_size, &num_miranda_methods, &all_mirandas, super_klass(), methods, - access_flags, class_loader, class_name, local_interfaces, - CHECK_(nullHandle)); - - // Size of Java itable (in words) - itable_size = access_flags.is_interface() ? 0 : klassItable::compute_itable_size(_transitive_interfaces); - - FieldLayoutInfo info; - layout_fields(class_loader, &fac, &parsed_annotations, &info, CHECK_NULL); - - int total_oop_map_size2 = - InstanceKlass::nonstatic_oop_map_size(info.total_oop_map_count); - - // Compute reference type - ReferenceType rt; - if (super_klass() == NULL) { - rt = REF_NONE; - } else { - rt = super_klass->reference_type(); - } - - // We can now create the basic Klass* for this klass - _klass = InstanceKlass::allocate_instance_klass(loader_data, - vtable_size, - itable_size, - info.static_field_size, - total_oop_map_size2, - rt, - access_flags, - name, - super_klass(), - !host_klass.is_null(), - CHECK_(nullHandle)); - instanceKlassHandle this_klass (THREAD, _klass); - - assert(this_klass->static_field_size() == info.static_field_size, "sanity"); - assert(this_klass->nonstatic_oop_map_count() == info.total_oop_map_count, - "sanity"); - - // Fill in information already parsed - this_klass->set_should_verify_class(verify); - jint lh = Klass::instance_layout_helper(info.instance_size, false); - this_klass->set_layout_helper(lh); - assert(this_klass->oop_is_instance(), "layout is correct"); - assert(this_klass->size_helper() == info.instance_size, "correct size_helper"); - // Not yet: supers are done below to support the new subtype-checking fields - //this_klass->set_super(super_klass()); - this_klass->set_class_loader_data(loader_data); - this_klass->set_nonstatic_field_size(info.nonstatic_field_size); - this_klass->set_has_nonstatic_fields(info.has_nonstatic_fields); - this_klass->set_static_oop_field_count(fac.count[STATIC_OOP]); - - apply_parsed_class_metadata(this_klass, java_fields_count, CHECK_NULL); - - if (has_final_method) { - this_klass->set_has_final_method(); - } - this_klass->copy_method_ordering(method_ordering, CHECK_NULL); - // The InstanceKlass::_methods_jmethod_ids cache - // is managed on the assumption that the initial cache - // size is equal to the number of methods in the class. If - // that changes, then InstanceKlass::idnum_can_increment() - // has to be changed accordingly. - this_klass->set_initial_method_idnum(methods->length()); - this_klass->set_name(cp->klass_name_at(this_class_index)); - if (is_anonymous()) // I am well known to myself - cp->klass_at_put(this_class_index, this_klass()); // eagerly resolve - - this_klass->set_minor_version(minor_version); - this_klass->set_major_version(major_version); - this_klass->set_has_default_methods(has_default_methods); - - if (!host_klass.is_null()) { - assert (this_klass->is_anonymous(), "should be the same"); - this_klass->set_host_klass(host_klass()); - } - - // Set up Method*::intrinsic_id as soon as we know the names of methods. - // (We used to do this lazily, but now we query it in Rewriter, - // which is eagerly done for every method, so we might as well do it now, - // when everything is fresh in memory.) - if (Method::klass_id_for_intrinsics(this_klass()) != vmSymbols::NO_SID) { - for (int j = 0; j < methods->length(); j++) { - methods->at(j)->init_intrinsic_id(); - } - } - - if (cached_class_file != NULL) { - // JVMTI: we have an InstanceKlass now, tell it about the cached bytes - this_klass->set_cached_class_file(cached_class_file); - } - - // Fill in field values obtained by parse_classfile_attributes - if (parsed_annotations.has_any_annotations()) - parsed_annotations.apply_to(this_klass); - apply_parsed_class_attributes(this_klass); - - // Miranda methods - if ((num_miranda_methods > 0) || - // if this class introduced new miranda methods or - (super_klass.not_null() && (super_klass->has_miranda_methods())) - // super class exists and this class inherited miranda methods - ) { - this_klass->set_has_miranda_methods(); // then set a flag - } - - // Fill in information needed to compute superclasses. - this_klass->initialize_supers(super_klass(), CHECK_(nullHandle)); - - // Initialize itable offset tables - klassItable::setup_itable_offset_table(this_klass); - - // Compute transitive closure of interfaces this class implements - // Do final class setup - fill_oop_maps(this_klass, info.nonstatic_oop_map_count, info.nonstatic_oop_offsets, info.nonstatic_oop_counts); - - // Fill in has_finalizer, has_vanilla_constructor, and layout_helper - set_precomputed_flags(this_klass); - - // reinitialize modifiers, using the InnerClasses attribute - int computed_modifiers = this_klass->compute_modifier_flags(CHECK_(nullHandle)); - this_klass->set_modifier_flags(computed_modifiers); - - // check if this class can access its super class - check_super_class_access(this_klass, CHECK_(nullHandle)); - - // check if this class can access its superinterfaces - check_super_interface_access(this_klass, CHECK_(nullHandle)); - - // check if this class overrides any final method - check_final_method_override(this_klass, CHECK_(nullHandle)); - - // check that if this class is an interface then it doesn't have static methods - if (this_klass->is_interface()) { - /* An interface in a JAVA 8 classfile can be static */ - if (_major_version < JAVA_8_VERSION) { - check_illegal_static_method(this_klass, CHECK_(nullHandle)); - } - } - - // Allocate mirror and initialize static fields - java_lang_Class::create_mirror(this_klass, class_loader, protection_domain, - CHECK_(nullHandle)); - - // Generate any default methods - default methods are interface methods - // that have a default implementation. This is new with Lambda project. - if (has_default_methods ) { - DefaultMethods::generate_default_methods( - this_klass(), &all_mirandas, CHECK_(nullHandle)); - } - - // Update the loader_data graph. - record_defined_class_dependencies(this_klass, CHECK_NULL); - - ClassLoadingService::notify_class_loaded(InstanceKlass::cast(this_klass()), - false /* not shared class */); - - if (TraceClassLoading) { - ResourceMark rm; - // print in a single call to reduce interleaving of output - if (cfs->source() != NULL) { - tty->print("[Loaded %s from %s]\n", this_klass->external_name(), - cfs->source()); - } else if (class_loader.is_null()) { - Klass* caller = - THREAD->is_Java_thread() - ? ((JavaThread*)THREAD)->security_get_caller_class(1) - : NULL; - // caller can be NULL, for example, during a JVMTI VM_Init hook - if (caller != NULL) { - tty->print("[Loaded %s by instance of %s]\n", - this_klass->external_name(), - InstanceKlass::cast(caller)->external_name()); - } else { - tty->print("[Loaded %s]\n", this_klass->external_name()); - } - } else { - tty->print("[Loaded %s from %s]\n", this_klass->external_name(), - InstanceKlass::cast(class_loader->klass())->external_name()); - } - } - - if (TraceClassResolution) { - ResourceMark rm; - // print out the superclass. - const char * from = this_klass()->external_name(); - if (this_klass->java_super() != NULL) { - tty->print("RESOLVE %s %s (super)\n", from, InstanceKlass::cast(this_klass->java_super())->external_name()); - } - // print out each of the interface classes referred to by this class. - Array* local_interfaces = this_klass->local_interfaces(); - if (local_interfaces != NULL) { - int length = local_interfaces->length(); - for (int i = 0; i < length; i++) { - Klass* k = local_interfaces->at(i); - InstanceKlass* to_class = InstanceKlass::cast(k); - const char * to = to_class->external_name(); - tty->print("RESOLVE %s %s (interface)\n", from, to); - } - } - } - - // preserve result across HandleMark - preserve_this_klass = this_klass(); - } - - // Create new handle outside HandleMark (might be needed for - // Extended Class Redefinition) - instanceKlassHandle this_klass (THREAD, preserve_this_klass); - debug_only(this_klass->verify();) - - // Clear class if no error has occurred so destructor doesn't deallocate it - _klass = NULL; - return this_klass; -} - -// Destructor to clean up if there's an error -ClassFileParser::~ClassFileParser() { - MetadataFactory::free_metadata(_loader_data, _cp); - MetadataFactory::free_array(_loader_data, _fields); - - // Free methods - InstanceKlass::deallocate_methods(_loader_data, _methods); - - // beware of the Universe::empty_blah_array!! - if (_inner_classes != Universe::the_empty_short_array()) { - MetadataFactory::free_array(_loader_data, _inner_classes); - } - - // Free interfaces - InstanceKlass::deallocate_interfaces(_loader_data, _super_klass(), - _local_interfaces, _transitive_interfaces); - - MetadataFactory::free_array(_loader_data, _annotations); - MetadataFactory::free_array(_loader_data, _type_annotations); - Annotations::free_contents(_loader_data, _fields_annotations); - Annotations::free_contents(_loader_data, _fields_type_annotations); - - clear_class_metadata(); - - // deallocate the klass if already created. Don't directly deallocate, but add - // to the deallocate list so that the klass is removed from the CLD::_klasses list - // at a safepoint. - if (_klass != NULL) { - _loader_data->add_to_deallocate_list(_klass); - } - _klass = NULL; -} - -void ClassFileParser::print_field_layout(Symbol* name, - Array* fields, - constantPoolHandle cp, - int instance_size, - int instance_fields_start, - int instance_fields_end, - int static_fields_end) { - tty->print("%s: field layout\n", name->as_klass_external_name()); - tty->print(" @%3d %s\n", instance_fields_start, "--- instance fields start ---"); - for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { - if (!fs.access_flags().is_static()) { - tty->print(" @%3d \"%s\" %s\n", - fs.offset(), - fs.name()->as_klass_external_name(), - fs.signature()->as_klass_external_name()); - } - } - tty->print(" @%3d %s\n", instance_fields_end, "--- instance fields end ---"); - tty->print(" @%3d %s\n", instance_size * wordSize, "--- instance ends ---"); - tty->print(" @%3d %s\n", InstanceMirrorKlass::offset_of_static_fields(), "--- static fields start ---"); - for (AllFieldStream fs(fields, cp); !fs.done(); fs.next()) { - if (fs.access_flags().is_static()) { - tty->print(" @%3d \"%s\" %s\n", - fs.offset(), - fs.name()->as_klass_external_name(), - fs.signature()->as_klass_external_name()); - } - } - tty->print(" @%3d %s\n", static_fields_end, "--- static fields end ---"); - tty->print("\n"); -} - -unsigned int -ClassFileParser::compute_oop_map_count(instanceKlassHandle super, - unsigned int nonstatic_oop_map_count, - int first_nonstatic_oop_offset) { - unsigned int map_count = - super.is_null() ? 0 : super->nonstatic_oop_map_count(); - if (nonstatic_oop_map_count > 0) { - // We have oops to add to map - if (map_count == 0) { - map_count = nonstatic_oop_map_count; - } else { - // Check whether we should add a new map block or whether the last one can - // be extended - OopMapBlock* const first_map = super->start_of_nonstatic_oop_maps(); - OopMapBlock* const last_map = first_map + map_count - 1; - - int next_offset = last_map->offset() + last_map->count() * heapOopSize; - if (next_offset == first_nonstatic_oop_offset) { - // There is no gap bettwen superklass's last oop field and first - // local oop field, merge maps. - nonstatic_oop_map_count -= 1; - } else { - // Superklass didn't end with a oop field, add extra maps - assert(next_offset < first_nonstatic_oop_offset, "just checking"); - } - map_count += nonstatic_oop_map_count; - } - } - return map_count; -} - - -void ClassFileParser::fill_oop_maps(instanceKlassHandle k, - unsigned int nonstatic_oop_map_count, - int* nonstatic_oop_offsets, - unsigned int* nonstatic_oop_counts) { - OopMapBlock* this_oop_map = k->start_of_nonstatic_oop_maps(); - const InstanceKlass* const super = k->superklass(); - const unsigned int super_count = super ? super->nonstatic_oop_map_count() : 0; - if (super_count > 0) { - // Copy maps from superklass - OopMapBlock* super_oop_map = super->start_of_nonstatic_oop_maps(); - for (unsigned int i = 0; i < super_count; ++i) { - *this_oop_map++ = *super_oop_map++; - } - } - - if (nonstatic_oop_map_count > 0) { - if (super_count + nonstatic_oop_map_count > k->nonstatic_oop_map_count()) { - // The counts differ because there is no gap between superklass's last oop - // field and the first local oop field. Extend the last oop map copied - // from the superklass instead of creating new one. - nonstatic_oop_map_count--; - nonstatic_oop_offsets++; - this_oop_map--; - this_oop_map->set_count(this_oop_map->count() + *nonstatic_oop_counts++); - this_oop_map++; - } - - // Add new map blocks, fill them - while (nonstatic_oop_map_count-- > 0) { - this_oop_map->set_offset(*nonstatic_oop_offsets++); - this_oop_map->set_count(*nonstatic_oop_counts++); - this_oop_map++; - } - assert(k->start_of_nonstatic_oop_maps() + k->nonstatic_oop_map_count() == - this_oop_map, "sanity"); - } -} - - -void ClassFileParser::set_precomputed_flags(instanceKlassHandle k) { - Klass* super = k->super(); - - // Check if this klass has an empty finalize method (i.e. one with return bytecode only), - // in which case we don't have to register objects as finalizable - if (!_has_empty_finalizer) { - if (_has_finalizer || - (super != NULL && super->has_finalizer())) { - k->set_has_finalizer(); - } - } - -#ifdef ASSERT - bool f = false; - Method* m = k->lookup_method(vmSymbols::finalize_method_name(), - vmSymbols::void_method_signature()); - if (m != NULL && !m->is_empty_method()) { - f = true; - } - - // Spec doesn't prevent agent from redefinition of empty finalizer. - // Despite the fact that it's generally bad idea and redefined finalizer - // will not work as expected we shouldn't abort vm in this case - if (!k->has_redefined_this_or_super()) { - assert(f == k->has_finalizer(), "inconsistent has_finalizer"); - } -#endif - - // Check if this klass supports the java.lang.Cloneable interface - if (SystemDictionary::Cloneable_klass_loaded()) { - if (k->is_subtype_of(SystemDictionary::Cloneable_klass())) { - k->set_is_cloneable(); - } - } - - // Check if this klass has a vanilla default constructor - if (super == NULL) { - // java.lang.Object has empty default constructor - k->set_has_vanilla_constructor(); - } else { - if (super->has_vanilla_constructor() && - _has_vanilla_constructor) { - k->set_has_vanilla_constructor(); - } -#ifdef ASSERT - bool v = false; - if (super->has_vanilla_constructor()) { - Method* constructor = k->find_method(vmSymbols::object_initializer_name( -), vmSymbols::void_method_signature()); - if (constructor != NULL && constructor->is_vanilla_constructor()) { - v = true; - } - } - assert(v == k->has_vanilla_constructor(), "inconsistent has_vanilla_constructor"); -#endif - } - - // If it cannot be fast-path allocated, set a bit in the layout helper. - // See documentation of InstanceKlass::can_be_fastpath_allocated(). - assert(k->size_helper() > 0, "layout_helper is initialized"); - if ((!RegisterFinalizersAtInit && k->has_finalizer()) - || k->is_abstract() || k->is_interface() - || (k->name() == vmSymbols::java_lang_Class() && k->class_loader() == NULL) - || k->size_helper() >= FastAllocateSizeLimit) { - // Forbid fast-path allocation. - jint lh = Klass::instance_layout_helper(k->size_helper(), true); - k->set_layout_helper(lh); - } -} - -// Attach super classes and interface classes to class loader data -void ClassFileParser::record_defined_class_dependencies(instanceKlassHandle defined_klass, TRAPS) { - ClassLoaderData * defining_loader_data = defined_klass->class_loader_data(); - if (defining_loader_data->is_the_null_class_loader_data()) { - // Dependencies to null class loader data are implicit. - return; - } else { - // add super class dependency - Klass* super = defined_klass->super(); - if (super != NULL) { - defining_loader_data->record_dependency(super, CHECK); - } - - // add super interface dependencies - Array* local_interfaces = defined_klass->local_interfaces(); - if (local_interfaces != NULL) { - int length = local_interfaces->length(); - for (int i = 0; i < length; i++) { - defining_loader_data->record_dependency(local_interfaces->at(i), CHECK); - } - } - } -} - -// utility methods for appending an array with check for duplicates - -void append_interfaces(GrowableArray* result, Array* ifs) { - // iterate over new interfaces - for (int i = 0; i < ifs->length(); i++) { - Klass* e = ifs->at(i); - assert(e->is_klass() && InstanceKlass::cast(e)->is_interface(), "just checking"); - // add new interface - result->append_if_missing(e); - } -} - -Array* ClassFileParser::compute_transitive_interfaces( - instanceKlassHandle super, - Array* local_ifs, TRAPS) { - // Compute maximum size for transitive interfaces - int max_transitive_size = 0; - int super_size = 0; - // Add superclass transitive interfaces size - if (super.not_null()) { - super_size = super->transitive_interfaces()->length(); - max_transitive_size += super_size; - } - // Add local interfaces' super interfaces - int local_size = local_ifs->length(); - for (int i = 0; i < local_size; i++) { - Klass* l = local_ifs->at(i); - max_transitive_size += InstanceKlass::cast(l)->transitive_interfaces()->length(); - } - // Finally add local interfaces - max_transitive_size += local_size; - // Construct array - if (max_transitive_size == 0) { - // no interfaces, use canonicalized array - return Universe::the_empty_klass_array(); - } else if (max_transitive_size == super_size) { - // no new local interfaces added, share superklass' transitive interface array - return super->transitive_interfaces(); - } else if (max_transitive_size == local_size) { - // only local interfaces added, share local interface array - return local_ifs; - } else { - ResourceMark rm; - GrowableArray* result = new GrowableArray(max_transitive_size); - - // Copy down from superclass - if (super.not_null()) { - append_interfaces(result, super->transitive_interfaces()); - } - - // Copy down from local interfaces' superinterfaces - for (int i = 0; i < local_ifs->length(); i++) { - Klass* l = local_ifs->at(i); - append_interfaces(result, InstanceKlass::cast(l)->transitive_interfaces()); - } - // Finally add local interfaces - append_interfaces(result, local_ifs); - - // length will be less than the max_transitive_size if duplicates were removed - int length = result->length(); - assert(length <= max_transitive_size, "just checking"); - Array* new_result = MetadataFactory::new_array(_loader_data, length, CHECK_NULL); - for (int i = 0; i < length; i++) { - Klass* e = result->at(i); - assert(e != NULL, "just checking"); - new_result->at_put(i, e); - } - return new_result; - } -} - -void ClassFileParser::check_super_class_access(instanceKlassHandle this_klass, TRAPS) { - Klass* super = this_klass->super(); - if ((super != NULL) && - (!Reflection::verify_class_access(this_klass(), super, false))) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_IllegalAccessError(), - "class %s cannot access its superclass %s", - this_klass->external_name(), - InstanceKlass::cast(super)->external_name() - ); - return; - } -} - - -void ClassFileParser::check_super_interface_access(instanceKlassHandle this_klass, TRAPS) { - Array* local_interfaces = this_klass->local_interfaces(); - int lng = local_interfaces->length(); - for (int i = lng - 1; i >= 0; i--) { - Klass* k = local_interfaces->at(i); - assert (k != NULL && k->is_interface(), "invalid interface"); - if (!Reflection::verify_class_access(this_klass(), k, false)) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_IllegalAccessError(), - "class %s cannot access its superinterface %s", - this_klass->external_name(), - InstanceKlass::cast(k)->external_name() - ); - return; - } - } -} - - -void ClassFileParser::check_final_method_override(instanceKlassHandle this_klass, TRAPS) { - Array* methods = this_klass->methods(); - int num_methods = methods->length(); - - // go thru each method and check if it overrides a final method - for (int index = 0; index < num_methods; index++) { - Method* m = methods->at(index); - - // skip private, static, and methods - if ((!m->is_private() && !m->is_static()) && - (m->name() != vmSymbols::object_initializer_name())) { - - Symbol* name = m->name(); - Symbol* signature = m->signature(); - Klass* k = this_klass->super(); - Method* super_m = NULL; - while (k != NULL) { - // skip supers that don't have final methods. - if (k->has_final_method()) { - // lookup a matching method in the super class hierarchy - super_m = InstanceKlass::cast(k)->lookup_method(name, signature); - if (super_m == NULL) { - break; // didn't find any match; get out - } - - if (super_m->is_final() && !super_m->is_static() && - // matching method in super is final, and not static - (Reflection::verify_field_access(this_klass(), - super_m->method_holder(), - super_m->method_holder(), - super_m->access_flags(), false)) - // this class can access super final method and therefore override - ) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_VerifyError(), - "class %s overrides final method %s.%s%s", - this_klass->external_name(), - super_m->method_holder()->external_name(), - name->as_C_string(), - signature->as_C_string() - ); - return; - } - - // continue to look from super_m's holder's super. - k = super_m->method_holder()->super(); - continue; - } - - k = k->super(); - } - } - } -} - - -// assumes that this_klass is an interface -void ClassFileParser::check_illegal_static_method(instanceKlassHandle this_klass, TRAPS) { - assert(this_klass->is_interface(), "not an interface"); - Array* methods = this_klass->methods(); - int num_methods = methods->length(); - - for (int index = 0; index < num_methods; index++) { - Method* m = methods->at(index); - // if m is static and not the init method, throw a verify error - if ((m->is_static()) && (m->name() != vmSymbols::class_initializer_name())) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_VerifyError(), - "Illegal static method %s in interface %s", - m->name()->as_C_string(), - this_klass->external_name() - ); - return; - } - } -} - -// utility methods for format checking - -void ClassFileParser::verify_legal_class_modifiers(jint flags, TRAPS) { - if (!_need_verify) { return; } - - const bool is_interface = (flags & JVM_ACC_INTERFACE) != 0; - const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; - const bool is_final = (flags & JVM_ACC_FINAL) != 0; - const bool is_super = (flags & JVM_ACC_SUPER) != 0; - const bool is_enum = (flags & JVM_ACC_ENUM) != 0; - const bool is_annotation = (flags & JVM_ACC_ANNOTATION) != 0; - const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; - - if ((is_abstract && is_final) || - (is_interface && !is_abstract) || - (is_interface && major_gte_15 && (is_super || is_enum)) || - (!is_interface && major_gte_15 && is_annotation)) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_ClassFormatError(), - "Illegal class modifiers in class %s: 0x%X", - _class_name->as_C_string(), flags - ); - return; - } -} - -bool ClassFileParser::has_illegal_visibility(jint flags) { - const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; - const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; - const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; - - return ((is_public && is_protected) || - (is_public && is_private) || - (is_protected && is_private)); -} - -bool ClassFileParser::is_supported_version(u2 major, u2 minor) { - u2 max_version = JAVA_MAX_SUPPORTED_VERSION; - return (major >= JAVA_MIN_SUPPORTED_VERSION) && - (major <= max_version) && - ((major != max_version) || - (minor <= JAVA_MAX_SUPPORTED_MINOR_VERSION)); -} - -void ClassFileParser::verify_legal_field_modifiers( - jint flags, bool is_interface, TRAPS) { - if (!_need_verify) { return; } - - const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; - const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; - const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; - const bool is_static = (flags & JVM_ACC_STATIC) != 0; - const bool is_final = (flags & JVM_ACC_FINAL) != 0; - const bool is_volatile = (flags & JVM_ACC_VOLATILE) != 0; - const bool is_transient = (flags & JVM_ACC_TRANSIENT) != 0; - const bool is_enum = (flags & JVM_ACC_ENUM) != 0; - const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; - - bool is_illegal = false; - - if (is_interface) { - if (!is_public || !is_static || !is_final || is_private || - is_protected || is_volatile || is_transient || - (major_gte_15 && is_enum)) { - is_illegal = true; - } - } else { // not interface - if (has_illegal_visibility(flags) || (is_final && is_volatile)) { - is_illegal = true; - } - } - - if (is_illegal) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_ClassFormatError(), - "Illegal field modifiers in class %s: 0x%X", - _class_name->as_C_string(), flags); - return; - } -} - -void ClassFileParser::verify_legal_method_modifiers( - jint flags, bool is_interface, Symbol* name, TRAPS) { - if (!_need_verify) { return; } - - const bool is_public = (flags & JVM_ACC_PUBLIC) != 0; - const bool is_private = (flags & JVM_ACC_PRIVATE) != 0; - const bool is_static = (flags & JVM_ACC_STATIC) != 0; - const bool is_final = (flags & JVM_ACC_FINAL) != 0; - const bool is_native = (flags & JVM_ACC_NATIVE) != 0; - const bool is_abstract = (flags & JVM_ACC_ABSTRACT) != 0; - const bool is_bridge = (flags & JVM_ACC_BRIDGE) != 0; - const bool is_strict = (flags & JVM_ACC_STRICT) != 0; - const bool is_synchronized = (flags & JVM_ACC_SYNCHRONIZED) != 0; - const bool is_protected = (flags & JVM_ACC_PROTECTED) != 0; - const bool major_gte_15 = _major_version >= JAVA_1_5_VERSION; - const bool major_gte_8 = _major_version >= JAVA_8_VERSION; - const bool is_initializer = (name == vmSymbols::object_initializer_name()); - - bool is_illegal = false; - - if (is_interface) { - if (major_gte_8) { - // Class file version is JAVA_8_VERSION or later Methods of - // interfaces may set any of the flags except ACC_PROTECTED, - // ACC_FINAL, ACC_NATIVE, and ACC_SYNCHRONIZED; they must - // have exactly one of the ACC_PUBLIC or ACC_PRIVATE flags set. - if ((is_public == is_private) || /* Only one of private and public should be true - XNOR */ - (is_native || is_protected || is_final || is_synchronized) || - // If a specific method of a class or interface has its - // ACC_ABSTRACT flag set, it must not have any of its - // ACC_FINAL, ACC_NATIVE, ACC_PRIVATE, ACC_STATIC, - // ACC_STRICT, or ACC_SYNCHRONIZED flags set. No need to - // check for ACC_FINAL, ACC_NATIVE or ACC_SYNCHRONIZED as - // those flags are illegal irrespective of ACC_ABSTRACT being set or not. - (is_abstract && (is_private || is_static || is_strict))) { - is_illegal = true; - } - } else if (major_gte_15) { - // Class file version in the interval [JAVA_1_5_VERSION, JAVA_8_VERSION) - if (!is_public || is_static || is_final || is_synchronized || - is_native || !is_abstract || is_strict) { - is_illegal = true; - } - } else { - // Class file version is pre-JAVA_1_5_VERSION - if (!is_public || is_static || is_final || is_native || !is_abstract) { - is_illegal = true; - } - } - } else { // not interface - if (is_initializer) { - if (is_static || is_final || is_synchronized || is_native || - is_abstract || (major_gte_15 && is_bridge)) { - is_illegal = true; - } - } else { // not initializer - if (is_abstract) { - if ((is_final || is_native || is_private || is_static || - (major_gte_15 && (is_synchronized || is_strict)))) { - is_illegal = true; - } - } - if (has_illegal_visibility(flags)) { - is_illegal = true; - } - } - } - - if (is_illegal) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_ClassFormatError(), - "Method %s in class %s has illegal modifiers: 0x%X", - name->as_C_string(), _class_name->as_C_string(), flags); - return; - } -} - -void ClassFileParser::verify_legal_utf8(const unsigned char* buffer, int length, TRAPS) { - assert(_need_verify, "only called when _need_verify is true"); - int i = 0; - int count = length >> 2; - for (int k=0; k= 128 (highest bit 1) for v == 0 or v >= 128. - unsigned char res = b0 | b0 - 1 | - b1 | b1 - 1 | - b2 | b2 - 1 | - b3 | b3 - 1; - if (res >= 128) break; - i += 4; - } - for(; i < length; i++) { - unsigned short c; - // no embedded zeros - guarantee_property((buffer[i] != 0), "Illegal UTF8 string in constant pool in class file %s", CHECK); - if(buffer[i] < 128) { - continue; - } - if ((i + 5) < length) { // see if it's legal supplementary character - if (UTF8::is_supplementary_character(&buffer[i])) { - c = UTF8::get_supplementary_character(&buffer[i]); - i += 5; - continue; - } - } - switch (buffer[i] >> 4) { - default: break; - case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: - classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); - case 0xC: case 0xD: // 110xxxxx 10xxxxxx - c = (buffer[i] & 0x1F) << 6; - i++; - if ((i < length) && ((buffer[i] & 0xC0) == 0x80)) { - c += buffer[i] & 0x3F; - if (_major_version <= 47 || c == 0 || c >= 0x80) { - // for classes with major > 47, c must a null or a character in its shortest form - break; - } - } - classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); - case 0xE: // 1110xxxx 10xxxxxx 10xxxxxx - c = (buffer[i] & 0xF) << 12; - i += 2; - if ((i < length) && ((buffer[i-1] & 0xC0) == 0x80) && ((buffer[i] & 0xC0) == 0x80)) { - c += ((buffer[i-1] & 0x3F) << 6) + (buffer[i] & 0x3F); - if (_major_version <= 47 || c >= 0x800) { - // for classes with major > 47, c must be in its shortest form - break; - } - } - classfile_parse_error("Illegal UTF8 string in constant pool in class file %s", CHECK); - } // end of switch - } // end of for -} - -// Checks if name is a legal class name. -void ClassFileParser::verify_legal_class_name(Symbol* name, TRAPS) { - if (!_need_verify || _relax_verify) { return; } - - char buf[fixed_buffer_size]; - char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); - unsigned int length = name->utf8_length(); - bool legal = false; - - if (length > 0) { - char* p; - if (bytes[0] == JVM_SIGNATURE_ARRAY) { - p = skip_over_field_signature(bytes, false, length, CHECK); - legal = (p != NULL) && ((p - bytes) == (int)length); - } else if (_major_version < JAVA_1_5_VERSION) { - if (bytes[0] != '<') { - p = skip_over_field_name(bytes, true, length); - legal = (p != NULL) && ((p - bytes) == (int)length); - } - } else { - // 4900761: relax the constraints based on JSR202 spec - // Class names may be drawn from the entire Unicode character set. - // Identifiers between '/' must be unqualified names. - // The utf8 string has been verified when parsing cpool entries. - legal = verify_unqualified_name(bytes, length, LegalClass); - } - } - if (!legal) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_ClassFormatError(), - "Illegal class name \"%s\" in class file %s", bytes, - _class_name->as_C_string() - ); - return; - } -} - -// Checks if name is a legal field name. -void ClassFileParser::verify_legal_field_name(Symbol* name, TRAPS) { - if (!_need_verify || _relax_verify) { return; } - - char buf[fixed_buffer_size]; - char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); - unsigned int length = name->utf8_length(); - bool legal = false; - - if (length > 0) { - if (_major_version < JAVA_1_5_VERSION) { - if (bytes[0] != '<') { - char* p = skip_over_field_name(bytes, false, length); - legal = (p != NULL) && ((p - bytes) == (int)length); - } - } else { - // 4881221: relax the constraints based on JSR202 spec - legal = verify_unqualified_name(bytes, length, LegalField); - } - } - - if (!legal) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_ClassFormatError(), - "Illegal field name \"%s\" in class %s", bytes, - _class_name->as_C_string() - ); - return; - } -} - -// Checks if name is a legal method name. -void ClassFileParser::verify_legal_method_name(Symbol* name, TRAPS) { - if (!_need_verify || _relax_verify) { return; } - - assert(name != NULL, "method name is null"); - char buf[fixed_buffer_size]; - char* bytes = name->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); - unsigned int length = name->utf8_length(); - bool legal = false; - - if (length > 0) { - if (bytes[0] == '<') { - if (name == vmSymbols::object_initializer_name() || name == vmSymbols::class_initializer_name()) { - legal = true; - } - } else if (_major_version < JAVA_1_5_VERSION) { - char* p; - p = skip_over_field_name(bytes, false, length); - legal = (p != NULL) && ((p - bytes) == (int)length); - } else { - // 4881221: relax the constraints based on JSR202 spec - legal = verify_unqualified_name(bytes, length, LegalMethod); - } - } - - if (!legal) { - ResourceMark rm(THREAD); - Exceptions::fthrow( - THREAD_AND_LOCATION, - vmSymbols::java_lang_ClassFormatError(), - "Illegal method name \"%s\" in class %s", bytes, - _class_name->as_C_string() - ); - return; - } -} - - -// Checks if signature is a legal field signature. -void ClassFileParser::verify_legal_field_signature(Symbol* name, Symbol* signature, TRAPS) { - if (!_need_verify) { return; } - - char buf[fixed_buffer_size]; - char* bytes = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); - unsigned int length = signature->utf8_length(); - char* p = skip_over_field_signature(bytes, false, length, CHECK); - - if (p == NULL || (p - bytes) != (int)length) { - throwIllegalSignature("Field", name, signature, CHECK); - } -} - -// Checks if signature is a legal method signature. -// Returns number of parameters -int ClassFileParser::verify_legal_method_signature(Symbol* name, Symbol* signature, TRAPS) { - if (!_need_verify) { - // make sure caller's args_size will be less than 0 even for non-static - // method so it will be recomputed in compute_size_of_parameters(). - return -2; - } - - unsigned int args_size = 0; - char buf[fixed_buffer_size]; - char* p = signature->as_utf8_flexible_buffer(THREAD, buf, fixed_buffer_size); - unsigned int length = signature->utf8_length(); - char* nextp; - - // The first character must be a '(' - if ((length > 0) && (*p++ == JVM_SIGNATURE_FUNC)) { - length--; - // Skip over legal field signatures - nextp = skip_over_field_signature(p, false, length, CHECK_0); - while ((length > 0) && (nextp != NULL)) { - args_size++; - if (p[0] == 'J' || p[0] == 'D') { - args_size++; - } - length -= nextp - p; - p = nextp; - nextp = skip_over_field_signature(p, false, length, CHECK_0); - } - // The first non-signature thing better be a ')' - if ((length > 0) && (*p++ == JVM_SIGNATURE_ENDFUNC)) { - length--; - if (name->utf8_length() > 0 && name->byte_at(0) == '<') { - // All internal methods must return void - if ((length == 1) && (p[0] == JVM_SIGNATURE_VOID)) { - return args_size; - } - } else { - // Now we better just have a return value - nextp = skip_over_field_signature(p, true, length, CHECK_0); - if (nextp && ((int)length == (nextp - p))) { - return args_size; - } - } - } - } - // Report error - throwIllegalSignature("Method", name, signature, CHECK_0); - return 0; -} - - -// Unqualified names may not contain the characters '.', ';', '[', or '/'. -// Method names also may not contain the characters '<' or '>', unless -// or . Note that method names may not be or in this -// method. Because these names have been checked as special cases before -// calling this method in verify_legal_method_name. -bool ClassFileParser::verify_unqualified_name( - char* name, unsigned int length, int type) { - jchar ch; - - for (char* p = name; p != name + length; ) { - ch = *p; - if (ch < 128) { - p++; - if (ch == '.' || ch == ';' || ch == '[' ) { - return false; // do not permit '.', ';', or '[' - } - if (type != LegalClass && ch == '/') { - return false; // do not permit '/' unless it's class name - } - if (type == LegalMethod && (ch == '<' || ch == '>')) { - return false; // do not permit '<' or '>' in method names - } - } else { - char* tmp_p = UTF8::next(p, &ch); - p = tmp_p; - } - } - return true; -} - - -// Take pointer to a string. Skip over the longest part of the string that could -// be taken as a fieldname. Allow '/' if slash_ok is true. -// Return a pointer to just past the fieldname. -// Return NULL if no fieldname at all was found, or in the case of slash_ok -// being true, we saw consecutive slashes (meaning we were looking for a -// qualified path but found something that was badly-formed). -char* ClassFileParser::skip_over_field_name(char* name, bool slash_ok, unsigned int length) { - char* p; - jchar ch; - jboolean last_is_slash = false; - jboolean not_first_ch = false; - - for (p = name; p != name + length; not_first_ch = true) { - char* old_p = p; - ch = *p; - if (ch < 128) { - p++; - // quick check for ascii - if ((ch >= 'a' && ch <= 'z') || - (ch >= 'A' && ch <= 'Z') || - (ch == '_' || ch == '$') || - (not_first_ch && ch >= '0' && ch <= '9')) { - last_is_slash = false; - continue; - } - if (slash_ok && ch == '/') { - if (last_is_slash) { - return NULL; // Don't permit consecutive slashes - } - last_is_slash = true; - continue; - } - } else { - jint unicode_ch; - char* tmp_p = UTF8::next_character(p, &unicode_ch); - p = tmp_p; - last_is_slash = false; - // Check if ch is Java identifier start or is Java identifier part - // 4672820: call java.lang.Character methods directly without generating separate tables. - EXCEPTION_MARK; - instanceKlassHandle klass (THREAD, SystemDictionary::Character_klass()); - - // return value - JavaValue result(T_BOOLEAN); - // Set up the arguments to isJavaIdentifierStart and isJavaIdentifierPart - JavaCallArguments args; - args.push_int(unicode_ch); - - // public static boolean isJavaIdentifierStart(char ch); - JavaCalls::call_static(&result, - klass, - vmSymbols::isJavaIdentifierStart_name(), - vmSymbols::int_bool_signature(), - &args, - THREAD); - - if (HAS_PENDING_EXCEPTION) { - CLEAR_PENDING_EXCEPTION; - return 0; - } - if (result.get_jboolean()) { - continue; - } - - if (not_first_ch) { - // public static boolean isJavaIdentifierPart(char ch); - JavaCalls::call_static(&result, - klass, - vmSymbols::isJavaIdentifierPart_name(), - vmSymbols::int_bool_signature(), - &args, - THREAD); - - if (HAS_PENDING_EXCEPTION) { - CLEAR_PENDING_EXCEPTION; - return 0; - } - - if (result.get_jboolean()) { - continue; - } - } - } - return (not_first_ch) ? old_p : NULL; - } - return (not_first_ch) ? p : NULL; -} - - -// Take pointer to a string. Skip over the longest part of the string that could -// be taken as a field signature. Allow "void" if void_ok. -// Return a pointer to just past the signature. -// Return NULL if no legal signature is found. -char* ClassFileParser::skip_over_field_signature(char* signature, - bool void_ok, - unsigned int length, - TRAPS) { - unsigned int array_dim = 0; - while (length > 0) { - switch (signature[0]) { - case JVM_SIGNATURE_VOID: if (!void_ok) { return NULL; } - case JVM_SIGNATURE_BOOLEAN: - case JVM_SIGNATURE_BYTE: - case JVM_SIGNATURE_CHAR: - case JVM_SIGNATURE_SHORT: - case JVM_SIGNATURE_INT: - case JVM_SIGNATURE_FLOAT: - case JVM_SIGNATURE_LONG: - case JVM_SIGNATURE_DOUBLE: - return signature + 1; - case JVM_SIGNATURE_CLASS: { - if (_major_version < JAVA_1_5_VERSION) { - // Skip over the class name if one is there - char* p = skip_over_field_name(signature + 1, true, --length); - - // The next character better be a semicolon - if (p && (p - signature) > 1 && p[0] == ';') { - return p + 1; - } - } else { - // 4900761: For class version > 48, any unicode is allowed in class name. - length--; - signature++; - while (length > 0 && signature[0] != ';') { - if (signature[0] == '.') { - classfile_parse_error("Class name contains illegal character '.' in descriptor in class file %s", CHECK_0); - } - length--; - signature++; - } - if (signature[0] == ';') { return signature + 1; } - } - - return NULL; - } - case JVM_SIGNATURE_ARRAY: - array_dim++; - if (array_dim > 255) { - // 4277370: array descriptor is valid only if it represents 255 or fewer dimensions. - classfile_parse_error("Array type descriptor has more than 255 dimensions in class file %s", CHECK_0); - } - // The rest of what's there better be a legal signature - signature++; - length--; - void_ok = false; - break; - - default: - return NULL; - } - } - return NULL; -}