1076 lines
48 KiB
C++
1076 lines
48 KiB
C++
/*
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_VM_OOPS_INSTANCEKLASS_HPP
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#define SHARE_VM_OOPS_INSTANCEKLASS_HPP
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#include "oops/constMethodOop.hpp"
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#include "oops/constantPoolOop.hpp"
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#include "oops/fieldInfo.hpp"
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#include "oops/instanceOop.hpp"
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#include "oops/klassOop.hpp"
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#include "oops/klassVtable.hpp"
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#include "oops/objArrayOop.hpp"
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#include "runtime/handles.hpp"
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#include "runtime/os.hpp"
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#include "utilities/accessFlags.hpp"
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#include "utilities/bitMap.inline.hpp"
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// An instanceKlass is the VM level representation of a Java class.
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// It contains all information needed for at class at execution runtime.
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// instanceKlass layout:
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// [header ] klassOop
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// [klass pointer ] klassOop
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// [C++ vtbl pointer ] Klass
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// [subtype cache ] Klass
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// [instance size ] Klass
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// [java mirror ] Klass
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// [super ] Klass
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// [access_flags ] Klass
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// [name ] Klass
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// [first subklass ] Klass
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// [next sibling ] Klass
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// [array klasses ]
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// [methods ]
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// [local interfaces ]
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// [transitive interfaces ]
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// [number of implementors ]
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// [implementors ] klassOop[2]
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// [fields ]
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// [constants ]
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// [class loader ]
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// [protection domain ]
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// [signers ]
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// [source file name ]
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// [inner classes ]
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// [static field size ]
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// [nonstatic field size ]
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// [static oop fields size ]
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// [nonstatic oop maps size ]
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// [has finalize method ]
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// [deoptimization mark bit ]
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// [initialization state ]
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// [initializing thread ]
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// [Java vtable length ]
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// [oop map cache (stack maps) ]
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// [EMBEDDED Java vtable ] size in words = vtable_len
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// [EMBEDDED nonstatic oop-map blocks] size in words = nonstatic_oop_map_size
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//
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// The embedded nonstatic oop-map blocks are short pairs (offset, length) indicating
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// where oops are located in instances of this klass.
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// forward declaration for class -- see below for definition
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class SuperTypeClosure;
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class JNIid;
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class jniIdMapBase;
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class BreakpointInfo;
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class fieldDescriptor;
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class DepChange;
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class nmethodBucket;
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class PreviousVersionNode;
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class JvmtiCachedClassFieldMap;
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// This is used in iterators below.
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class FieldClosure: public StackObj {
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public:
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virtual void do_field(fieldDescriptor* fd) = 0;
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};
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#ifndef PRODUCT
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// Print fields.
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// If "obj" argument to constructor is NULL, prints static fields, otherwise prints non-static fields.
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class FieldPrinter: public FieldClosure {
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oop _obj;
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outputStream* _st;
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public:
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FieldPrinter(outputStream* st, oop obj = NULL) : _obj(obj), _st(st) {}
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void do_field(fieldDescriptor* fd);
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};
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#endif // !PRODUCT
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// ValueObjs embedded in klass. Describes where oops are located in instances of
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// this klass.
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class OopMapBlock VALUE_OBJ_CLASS_SPEC {
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public:
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// Byte offset of the first oop mapped by this block.
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int offset() const { return _offset; }
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void set_offset(int offset) { _offset = offset; }
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// Number of oops in this block.
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uint count() const { return _count; }
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void set_count(uint count) { _count = count; }
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// sizeof(OopMapBlock) in HeapWords.
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static const int size_in_words() {
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return align_size_up(int(sizeof(OopMapBlock)), HeapWordSize) >>
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LogHeapWordSize;
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}
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private:
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int _offset;
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uint _count;
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};
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class instanceKlass: public Klass {
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friend class VMStructs;
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public:
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// See "The Java Virtual Machine Specification" section 2.16.2-5 for a detailed description
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// of the class loading & initialization procedure, and the use of the states.
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enum ClassState {
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unparsable_by_gc = 0, // object is not yet parsable by gc. Value of _init_state at object allocation.
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allocated, // allocated (but not yet linked)
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loaded, // loaded and inserted in class hierarchy (but not linked yet)
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linked, // successfully linked/verified (but not initialized yet)
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being_initialized, // currently running class initializer
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fully_initialized, // initialized (successfull final state)
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initialization_error // error happened during initialization
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};
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public:
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oop* oop_block_beg() const { return adr_array_klasses(); }
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oop* oop_block_end() const { return adr_methods_default_annotations() + 1; }
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enum {
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implementors_limit = 2 // how many implems can we track?
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};
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protected:
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//
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// The oop block. See comment in klass.hpp before making changes.
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//
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// Array classes holding elements of this class.
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klassOop _array_klasses;
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// Method array.
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objArrayOop _methods;
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// Int array containing the original order of method in the class file (for
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// JVMTI).
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typeArrayOop _method_ordering;
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// Interface (klassOops) this class declares locally to implement.
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objArrayOop _local_interfaces;
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// Interface (klassOops) this class implements transitively.
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objArrayOop _transitive_interfaces;
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// Instance and static variable information, 5-tuples of shorts [access, name
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// index, sig index, initval index, offset].
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typeArrayOop _fields;
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// Constant pool for this class.
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constantPoolOop _constants;
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// Class loader used to load this class, NULL if VM loader used.
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oop _class_loader;
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// Protection domain.
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oop _protection_domain;
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// Host class, which grants its access privileges to this class also.
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// This is only non-null for an anonymous class (JSR 292 enabled).
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// The host class is either named, or a previously loaded anonymous class.
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klassOop _host_klass;
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// Class signers.
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objArrayOop _signers;
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// inner_classes attribute.
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typeArrayOop _inner_classes;
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// Implementors of this interface (not valid if it overflows)
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klassOop _implementors[implementors_limit];
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// Annotations for this class, or null if none.
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typeArrayOop _class_annotations;
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// Annotation objects (byte arrays) for fields, or null if no annotations.
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// Indices correspond to entries (not indices) in fields array.
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objArrayOop _fields_annotations;
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// Annotation objects (byte arrays) for methods, or null if no annotations.
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// Index is the idnum, which is initially the same as the methods array index.
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objArrayOop _methods_annotations;
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// Annotation objects (byte arrays) for methods' parameters, or null if no
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// such annotations.
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// Index is the idnum, which is initially the same as the methods array index.
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objArrayOop _methods_parameter_annotations;
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// Annotation objects (byte arrays) for methods' default values, or null if no
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// such annotations.
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// Index is the idnum, which is initially the same as the methods array index.
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objArrayOop _methods_default_annotations;
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//
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// End of the oop block.
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//
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// Name of source file containing this klass, NULL if not specified.
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Symbol* _source_file_name;
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// the source debug extension for this klass, NULL if not specified.
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Symbol* _source_debug_extension;
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// Generic signature, or null if none.
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Symbol* _generic_signature;
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// Array name derived from this class which needs unreferencing
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// if this class is unloaded.
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Symbol* _array_name;
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// Number of heapOopSize words used by non-static fields in this klass
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// (including inherited fields but after header_size()).
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int _nonstatic_field_size;
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int _static_field_size; // number words used by static fields (oop and non-oop) in this klass
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u2 _static_oop_field_count;// number of static oop fields in this klass
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u2 _java_fields_count; // The number of declared Java fields
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int _nonstatic_oop_map_size;// size in words of nonstatic oop map blocks
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u2 _minor_version; // minor version number of class file
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u2 _major_version; // major version number of class file
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Thread* _init_thread; // Pointer to current thread doing initialization (to handle recusive initialization)
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int _vtable_len; // length of Java vtable (in words)
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int _itable_len; // length of Java itable (in words)
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ReferenceType _reference_type; // reference type
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OopMapCache* volatile _oop_map_cache; // OopMapCache for all methods in the klass (allocated lazily)
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JNIid* _jni_ids; // First JNI identifier for static fields in this class
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jmethodID* _methods_jmethod_ids; // jmethodIDs corresponding to method_idnum, or NULL if none
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int* _methods_cached_itable_indices; // itable_index cache for JNI invoke corresponding to methods idnum, or NULL
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nmethodBucket* _dependencies; // list of dependent nmethods
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nmethod* _osr_nmethods_head; // Head of list of on-stack replacement nmethods for this class
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BreakpointInfo* _breakpoints; // bpt lists, managed by methodOop
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int _nof_implementors; // No of implementors of this interface (zero if not an interface)
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// Array of interesting part(s) of the previous version(s) of this
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// instanceKlass. See PreviousVersionWalker below.
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GrowableArray<PreviousVersionNode *>* _previous_versions;
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u2 _enclosing_method_class_index; // Constant pool index for class of enclosing method, or 0 if none
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u2 _enclosing_method_method_index; // Constant pool index for name and type of enclosing method, or 0 if none
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// JVMTI fields can be moved to their own structure - see 6315920
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unsigned char * _cached_class_file_bytes; // JVMTI: cached class file, before retransformable agent modified it in CFLH
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jint _cached_class_file_len; // JVMTI: length of above
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JvmtiCachedClassFieldMap* _jvmti_cached_class_field_map; // JVMTI: used during heap iteration
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volatile u2 _idnum_allocated_count; // JNI/JVMTI: increments with the addition of methods, old ids don't change
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// Class states are defined as ClassState (see above).
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// Place the _init_state here to utilize the unused 2-byte after
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// _idnum_allocated_count.
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u1 _init_state; // state of class
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// Compact the following four boolean flags into 1-bit each. These four flags
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// were defined as separate boolean fields and each was 1-byte before. Since
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// there are 2 bytes unused after the _idnum_allocated_count field, place the
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// _misc_flags field after _idnum_allocated_count to utilize the unused bits
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// and save total 4-bytes.
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enum {
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IS_MARKED_DEPENDENT = 0x1, // used for marking during flushing and deoptimization
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REWRITTEN = 0x2, // methods rewritten.
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HAS_NONSTATIC_FIELDS = 0x4, // for sizing with UseCompressedOops
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SHOULD_VERIFY_CLASS = 0x8 // allow caching of preverification
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};
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u1 _misc_flags;
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// embedded Java vtable follows here
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// embedded Java itables follows here
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// embedded static fields follows here
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// embedded nonstatic oop-map blocks follows here
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friend class instanceKlassKlass;
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friend class SystemDictionary;
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public:
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bool has_nonstatic_fields() const { return (_misc_flags & HAS_NONSTATIC_FIELDS) != 0; }
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void set_has_nonstatic_fields(bool b) {
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if (b) {
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_misc_flags |= HAS_NONSTATIC_FIELDS;
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} else {
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_misc_flags &= ~HAS_NONSTATIC_FIELDS;
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}
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}
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// field sizes
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int nonstatic_field_size() const { return _nonstatic_field_size; }
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void set_nonstatic_field_size(int size) { _nonstatic_field_size = size; }
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int static_field_size() const { return _static_field_size; }
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void set_static_field_size(int size) { _static_field_size = size; }
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int static_oop_field_count() const { return (int)_static_oop_field_count; }
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void set_static_oop_field_count(u2 size) { _static_oop_field_count = size; }
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// Java vtable
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int vtable_length() const { return _vtable_len; }
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void set_vtable_length(int len) { _vtable_len = len; }
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// Java itable
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int itable_length() const { return _itable_len; }
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void set_itable_length(int len) { _itable_len = len; }
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// array klasses
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klassOop array_klasses() const { return _array_klasses; }
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void set_array_klasses(klassOop k) { oop_store_without_check((oop*) &_array_klasses, (oop) k); }
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// methods
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objArrayOop methods() const { return _methods; }
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void set_methods(objArrayOop a) { oop_store_without_check((oop*) &_methods, (oop) a); }
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methodOop method_with_idnum(int idnum);
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// method ordering
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typeArrayOop method_ordering() const { return _method_ordering; }
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void set_method_ordering(typeArrayOop m) { oop_store_without_check((oop*) &_method_ordering, (oop) m); }
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// interfaces
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objArrayOop local_interfaces() const { return _local_interfaces; }
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void set_local_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_local_interfaces, (oop) a); }
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objArrayOop transitive_interfaces() const { return _transitive_interfaces; }
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void set_transitive_interfaces(objArrayOop a) { oop_store_without_check((oop*) &_transitive_interfaces, (oop) a); }
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private:
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friend class fieldDescriptor;
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FieldInfo* field(int index) const { return FieldInfo::from_field_array(_fields, index); }
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public:
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int field_offset (int index) const { return field(index)->offset(); }
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int field_access_flags(int index) const { return field(index)->access_flags(); }
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Symbol* field_name (int index) const { return field(index)->name(constants()); }
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Symbol* field_signature (int index) const { return field(index)->signature(constants()); }
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// Number of Java declared fields
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int java_fields_count() const { return (int)_java_fields_count; }
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// Number of fields including any injected fields
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int all_fields_count() const { return _fields->length() / sizeof(FieldInfo::field_slots); }
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typeArrayOop fields() const { return _fields; }
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void set_fields(typeArrayOop f, u2 java_fields_count) {
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oop_store_without_check((oop*) &_fields, (oop) f);
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_java_fields_count = java_fields_count;
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}
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// inner classes
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typeArrayOop inner_classes() const { return _inner_classes; }
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void set_inner_classes(typeArrayOop f) { oop_store_without_check((oop*) &_inner_classes, (oop) f); }
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enum InnerClassAttributeOffset {
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// From http://mirror.eng/products/jdk/1.1/docs/guide/innerclasses/spec/innerclasses.doc10.html#18814
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inner_class_inner_class_info_offset = 0,
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inner_class_outer_class_info_offset = 1,
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inner_class_inner_name_offset = 2,
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inner_class_access_flags_offset = 3,
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inner_class_next_offset = 4
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};
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// method override check
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bool is_override(methodHandle super_method, Handle targetclassloader, Symbol* targetclassname, TRAPS);
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// package
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bool is_same_class_package(klassOop class2);
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bool is_same_class_package(oop classloader2, Symbol* classname2);
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static bool is_same_class_package(oop class_loader1, Symbol* class_name1, oop class_loader2, Symbol* class_name2);
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// find an enclosing class (defined where original code was, in jvm.cpp!)
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klassOop compute_enclosing_class(bool* inner_is_member, TRAPS) {
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instanceKlassHandle self(THREAD, this->as_klassOop());
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return compute_enclosing_class_impl(self, inner_is_member, THREAD);
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}
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static klassOop compute_enclosing_class_impl(instanceKlassHandle self,
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bool* inner_is_member, TRAPS);
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// tell if two classes have the same enclosing class (at package level)
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bool is_same_package_member(klassOop class2, TRAPS) {
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instanceKlassHandle self(THREAD, this->as_klassOop());
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return is_same_package_member_impl(self, class2, THREAD);
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}
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static bool is_same_package_member_impl(instanceKlassHandle self,
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klassOop class2, TRAPS);
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// initialization state
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bool is_loaded() const { return _init_state >= loaded; }
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bool is_linked() const { return _init_state >= linked; }
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bool is_initialized() const { return _init_state == fully_initialized; }
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bool is_not_initialized() const { return _init_state < being_initialized; }
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bool is_being_initialized() const { return _init_state == being_initialized; }
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bool is_in_error_state() const { return _init_state == initialization_error; }
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bool is_reentrant_initialization(Thread *thread) { return thread == _init_thread; }
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ClassState init_state() { return (ClassState)_init_state; }
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bool is_rewritten() const { return (_misc_flags & REWRITTEN) != 0; }
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// defineClass specified verification
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bool should_verify_class() const { return (_misc_flags & SHOULD_VERIFY_CLASS) != 0; }
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void set_should_verify_class(bool value) {
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if (value) {
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_misc_flags |= SHOULD_VERIFY_CLASS;
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} else {
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_misc_flags &= ~SHOULD_VERIFY_CLASS;
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}
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}
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// marking
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bool is_marked_dependent() const { return (_misc_flags & IS_MARKED_DEPENDENT) != 0; }
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void set_is_marked_dependent() { _misc_flags |= IS_MARKED_DEPENDENT; }
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void clear_is_marked_dependent() { _misc_flags &= ~IS_MARKED_DEPENDENT; }
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// initialization (virtuals from Klass)
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bool should_be_initialized() const; // means that initialize should be called
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void initialize(TRAPS);
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void link_class(TRAPS);
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bool link_class_or_fail(TRAPS); // returns false on failure
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void unlink_class();
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void rewrite_class(TRAPS);
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void relocate_and_link_methods(TRAPS);
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methodOop class_initializer();
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// set the class to initialized if no static initializer is present
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void eager_initialize(Thread *thread);
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// reference type
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ReferenceType reference_type() const { return _reference_type; }
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void set_reference_type(ReferenceType t) { _reference_type = t; }
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static ByteSize reference_type_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _reference_type)); }
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// find local field, returns true if found
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bool find_local_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
|
|
// find field in direct superinterfaces, returns the interface in which the field is defined
|
|
klassOop find_interface_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
|
|
// find field according to JVM spec 5.4.3.2, returns the klass in which the field is defined
|
|
klassOop find_field(Symbol* name, Symbol* sig, fieldDescriptor* fd) const;
|
|
// find instance or static fields according to JVM spec 5.4.3.2, returns the klass in which the field is defined
|
|
klassOop find_field(Symbol* name, Symbol* sig, bool is_static, fieldDescriptor* fd) const;
|
|
|
|
// find a non-static or static field given its offset within the class.
|
|
bool contains_field_offset(int offset) {
|
|
return instanceOopDesc::contains_field_offset(offset, nonstatic_field_size());
|
|
}
|
|
|
|
bool find_local_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
|
|
bool find_field_from_offset(int offset, bool is_static, fieldDescriptor* fd) const;
|
|
|
|
// find a local method (returns NULL if not found)
|
|
methodOop find_method(Symbol* name, Symbol* signature) const;
|
|
static methodOop find_method(objArrayOop methods, Symbol* name, Symbol* signature);
|
|
|
|
// lookup operation (returns NULL if not found)
|
|
methodOop uncached_lookup_method(Symbol* name, Symbol* signature) const;
|
|
|
|
// lookup a method in all the interfaces that this class implements
|
|
// (returns NULL if not found)
|
|
methodOop lookup_method_in_all_interfaces(Symbol* name, Symbol* signature) const;
|
|
|
|
// constant pool
|
|
constantPoolOop constants() const { return _constants; }
|
|
void set_constants(constantPoolOop c) { oop_store_without_check((oop*) &_constants, (oop) c); }
|
|
|
|
// class loader
|
|
oop class_loader() const { return _class_loader; }
|
|
void set_class_loader(oop l) { oop_store((oop*) &_class_loader, l); }
|
|
|
|
// protection domain
|
|
oop protection_domain() { return _protection_domain; }
|
|
void set_protection_domain(oop pd) { oop_store((oop*) &_protection_domain, pd); }
|
|
|
|
// host class
|
|
oop host_klass() const { return _host_klass; }
|
|
void set_host_klass(oop host) { oop_store((oop*) &_host_klass, host); }
|
|
bool is_anonymous() const { return _host_klass != NULL; }
|
|
|
|
// signers
|
|
objArrayOop signers() const { return _signers; }
|
|
void set_signers(objArrayOop s) { oop_store((oop*) &_signers, oop(s)); }
|
|
|
|
// source file name
|
|
Symbol* source_file_name() const { return _source_file_name; }
|
|
void set_source_file_name(Symbol* n);
|
|
|
|
// minor and major version numbers of class file
|
|
u2 minor_version() const { return _minor_version; }
|
|
void set_minor_version(u2 minor_version) { _minor_version = minor_version; }
|
|
u2 major_version() const { return _major_version; }
|
|
void set_major_version(u2 major_version) { _major_version = major_version; }
|
|
|
|
// source debug extension
|
|
Symbol* source_debug_extension() const { return _source_debug_extension; }
|
|
void set_source_debug_extension(Symbol* n);
|
|
|
|
// symbol unloading support (refcount already added)
|
|
Symbol* array_name() { return _array_name; }
|
|
void set_array_name(Symbol* name) { assert(_array_name == NULL, "name already created"); _array_name = name; }
|
|
|
|
// nonstatic oop-map blocks
|
|
static int nonstatic_oop_map_size(unsigned int oop_map_count) {
|
|
return oop_map_count * OopMapBlock::size_in_words();
|
|
}
|
|
unsigned int nonstatic_oop_map_count() const {
|
|
return _nonstatic_oop_map_size / OopMapBlock::size_in_words();
|
|
}
|
|
int nonstatic_oop_map_size() const { return _nonstatic_oop_map_size; }
|
|
void set_nonstatic_oop_map_size(int words) {
|
|
_nonstatic_oop_map_size = words;
|
|
}
|
|
|
|
// RedefineClasses() support for previous versions:
|
|
void add_previous_version(instanceKlassHandle ikh, BitMap *emcp_methods,
|
|
int emcp_method_count);
|
|
// If the _previous_versions array is non-NULL, then this klass
|
|
// has been redefined at least once even if we aren't currently
|
|
// tracking a previous version.
|
|
bool has_been_redefined() const { return _previous_versions != NULL; }
|
|
bool has_previous_version() const;
|
|
void init_previous_versions() {
|
|
_previous_versions = NULL;
|
|
}
|
|
GrowableArray<PreviousVersionNode *>* previous_versions() const {
|
|
return _previous_versions;
|
|
}
|
|
|
|
// JVMTI: Support for caching a class file before it is modified by an agent that can do retransformation
|
|
void set_cached_class_file(unsigned char *class_file_bytes,
|
|
jint class_file_len) { _cached_class_file_len = class_file_len;
|
|
_cached_class_file_bytes = class_file_bytes; }
|
|
jint get_cached_class_file_len() { return _cached_class_file_len; }
|
|
unsigned char * get_cached_class_file_bytes() { return _cached_class_file_bytes; }
|
|
|
|
// JVMTI: Support for caching of field indices, types, and offsets
|
|
void set_jvmti_cached_class_field_map(JvmtiCachedClassFieldMap* descriptor) {
|
|
_jvmti_cached_class_field_map = descriptor;
|
|
}
|
|
JvmtiCachedClassFieldMap* jvmti_cached_class_field_map() const {
|
|
return _jvmti_cached_class_field_map;
|
|
}
|
|
|
|
// for adding methods, constMethodOopDesc::UNSET_IDNUM means no more ids available
|
|
inline u2 next_method_idnum();
|
|
void set_initial_method_idnum(u2 value) { _idnum_allocated_count = value; }
|
|
|
|
// generics support
|
|
Symbol* generic_signature() const { return _generic_signature; }
|
|
void set_generic_signature(Symbol* sig) { _generic_signature = sig; }
|
|
|
|
u2 enclosing_method_class_index() const { return _enclosing_method_class_index; }
|
|
u2 enclosing_method_method_index() const { return _enclosing_method_method_index; }
|
|
void set_enclosing_method_indices(u2 class_index,
|
|
u2 method_index) { _enclosing_method_class_index = class_index;
|
|
_enclosing_method_method_index = method_index; }
|
|
|
|
// jmethodID support
|
|
static jmethodID get_jmethod_id(instanceKlassHandle ik_h,
|
|
methodHandle method_h);
|
|
static jmethodID get_jmethod_id_fetch_or_update(instanceKlassHandle ik_h,
|
|
size_t idnum, jmethodID new_id, jmethodID* new_jmeths,
|
|
jmethodID* to_dealloc_id_p,
|
|
jmethodID** to_dealloc_jmeths_p);
|
|
static void get_jmethod_id_length_value(jmethodID* cache, size_t idnum,
|
|
size_t *length_p, jmethodID* id_p);
|
|
jmethodID jmethod_id_or_null(methodOop method);
|
|
|
|
// cached itable index support
|
|
void set_cached_itable_index(size_t idnum, int index);
|
|
int cached_itable_index(size_t idnum);
|
|
|
|
// annotations support
|
|
typeArrayOop class_annotations() const { return _class_annotations; }
|
|
objArrayOop fields_annotations() const { return _fields_annotations; }
|
|
objArrayOop methods_annotations() const { return _methods_annotations; }
|
|
objArrayOop methods_parameter_annotations() const { return _methods_parameter_annotations; }
|
|
objArrayOop methods_default_annotations() const { return _methods_default_annotations; }
|
|
void set_class_annotations(typeArrayOop md) { oop_store_without_check((oop*)&_class_annotations, (oop)md); }
|
|
void set_fields_annotations(objArrayOop md) { set_annotations(md, &_fields_annotations); }
|
|
void set_methods_annotations(objArrayOop md) { set_annotations(md, &_methods_annotations); }
|
|
void set_methods_parameter_annotations(objArrayOop md) { set_annotations(md, &_methods_parameter_annotations); }
|
|
void set_methods_default_annotations(objArrayOop md) { set_annotations(md, &_methods_default_annotations); }
|
|
typeArrayOop get_method_annotations_of(int idnum)
|
|
{ return get_method_annotations_from(idnum, _methods_annotations); }
|
|
typeArrayOop get_method_parameter_annotations_of(int idnum)
|
|
{ return get_method_annotations_from(idnum, _methods_parameter_annotations); }
|
|
typeArrayOop get_method_default_annotations_of(int idnum)
|
|
{ return get_method_annotations_from(idnum, _methods_default_annotations); }
|
|
void set_method_annotations_of(int idnum, typeArrayOop anno)
|
|
{ set_methods_annotations_of(idnum, anno, &_methods_annotations); }
|
|
void set_method_parameter_annotations_of(int idnum, typeArrayOop anno)
|
|
{ set_methods_annotations_of(idnum, anno, &_methods_annotations); }
|
|
void set_method_default_annotations_of(int idnum, typeArrayOop anno)
|
|
{ set_methods_annotations_of(idnum, anno, &_methods_annotations); }
|
|
|
|
// allocation
|
|
DEFINE_ALLOCATE_PERMANENT(instanceKlass);
|
|
instanceOop allocate_instance(TRAPS);
|
|
instanceOop allocate_permanent_instance(TRAPS);
|
|
|
|
// additional member function to return a handle
|
|
instanceHandle allocate_instance_handle(TRAPS) { return instanceHandle(THREAD, allocate_instance(THREAD)); }
|
|
|
|
objArrayOop allocate_objArray(int n, int length, TRAPS);
|
|
// Helper function
|
|
static instanceOop register_finalizer(instanceOop i, TRAPS);
|
|
|
|
// Check whether reflection/jni/jvm code is allowed to instantiate this class;
|
|
// if not, throw either an Error or an Exception.
|
|
virtual void check_valid_for_instantiation(bool throwError, TRAPS);
|
|
|
|
// initialization
|
|
void call_class_initializer(TRAPS);
|
|
void set_initialization_state_and_notify(ClassState state, TRAPS);
|
|
|
|
// OopMapCache support
|
|
OopMapCache* oop_map_cache() { return _oop_map_cache; }
|
|
void set_oop_map_cache(OopMapCache *cache) { _oop_map_cache = cache; }
|
|
void mask_for(methodHandle method, int bci, InterpreterOopMap* entry);
|
|
|
|
// JNI identifier support (for static fields - for jni performance)
|
|
JNIid* jni_ids() { return _jni_ids; }
|
|
void set_jni_ids(JNIid* ids) { _jni_ids = ids; }
|
|
JNIid* jni_id_for(int offset);
|
|
|
|
// maintenance of deoptimization dependencies
|
|
int mark_dependent_nmethods(DepChange& changes);
|
|
void add_dependent_nmethod(nmethod* nm);
|
|
void remove_dependent_nmethod(nmethod* nm);
|
|
|
|
// On-stack replacement support
|
|
nmethod* osr_nmethods_head() const { return _osr_nmethods_head; };
|
|
void set_osr_nmethods_head(nmethod* h) { _osr_nmethods_head = h; };
|
|
void add_osr_nmethod(nmethod* n);
|
|
void remove_osr_nmethod(nmethod* n);
|
|
nmethod* lookup_osr_nmethod(const methodOop m, int bci, int level, bool match_level) const;
|
|
|
|
// Breakpoint support (see methods on methodOop for details)
|
|
BreakpointInfo* breakpoints() const { return _breakpoints; };
|
|
void set_breakpoints(BreakpointInfo* bps) { _breakpoints = bps; };
|
|
|
|
// support for stub routines
|
|
static ByteSize init_state_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_state)); }
|
|
static ByteSize init_thread_offset() { return in_ByteSize(sizeof(klassOopDesc) + offset_of(instanceKlass, _init_thread)); }
|
|
|
|
// subclass/subinterface checks
|
|
bool implements_interface(klassOop k) const;
|
|
|
|
// Access to implementors of an interface. We only store the count
|
|
// of implementors, and in case, there are only a few
|
|
// implementors, we store them in a short list.
|
|
// This accessor returns NULL if we walk off the end of the list.
|
|
klassOop implementor(int i) const {
|
|
return (i < implementors_limit)? _implementors[i]: (klassOop) NULL;
|
|
}
|
|
int nof_implementors() const { return _nof_implementors; }
|
|
void add_implementor(klassOop k); // k is a new class that implements this interface
|
|
void init_implementor(); // initialize
|
|
|
|
// link this class into the implementors list of every interface it implements
|
|
void process_interfaces(Thread *thread);
|
|
|
|
// virtual operations from Klass
|
|
bool is_leaf_class() const { return _subklass == NULL; }
|
|
objArrayOop compute_secondary_supers(int num_extra_slots, TRAPS);
|
|
bool compute_is_subtype_of(klassOop k);
|
|
bool can_be_primary_super_slow() const;
|
|
klassOop java_super() const { return super(); }
|
|
int oop_size(oop obj) const { return size_helper(); }
|
|
int klass_oop_size() const { return object_size(); }
|
|
bool oop_is_instance_slow() const { return true; }
|
|
|
|
// Iterators
|
|
void do_local_static_fields(FieldClosure* cl);
|
|
void do_nonstatic_fields(FieldClosure* cl); // including inherited fields
|
|
void do_local_static_fields(void f(fieldDescriptor*, TRAPS), TRAPS);
|
|
|
|
void methods_do(void f(methodOop method));
|
|
void array_klasses_do(void f(klassOop k));
|
|
void with_array_klasses_do(void f(klassOop k));
|
|
bool super_types_do(SuperTypeClosure* blk);
|
|
|
|
// Casting from klassOop
|
|
static instanceKlass* cast(klassOop k) {
|
|
assert(k->is_klass(), "must be");
|
|
Klass* kp = k->klass_part();
|
|
assert(kp->null_vtbl() || kp->oop_is_instance_slow(), "cast to instanceKlass");
|
|
return (instanceKlass*) kp;
|
|
}
|
|
|
|
// Sizing (in words)
|
|
static int header_size() { return align_object_offset(oopDesc::header_size() + sizeof(instanceKlass)/HeapWordSize); }
|
|
int object_size() const { return object_size(align_object_offset(vtable_length()) + align_object_offset(itable_length()) + nonstatic_oop_map_size()); }
|
|
static int vtable_start_offset() { return header_size(); }
|
|
static int vtable_length_offset() { return oopDesc::header_size() + offset_of(instanceKlass, _vtable_len) / HeapWordSize; }
|
|
static int object_size(int extra) { return align_object_size(header_size() + extra); }
|
|
|
|
intptr_t* start_of_vtable() const { return ((intptr_t*)as_klassOop()) + vtable_start_offset(); }
|
|
intptr_t* start_of_itable() const { return start_of_vtable() + align_object_offset(vtable_length()); }
|
|
int itable_offset_in_words() const { return start_of_itable() - (intptr_t*)as_klassOop(); }
|
|
|
|
intptr_t* end_of_itable() const { return start_of_itable() + itable_length(); }
|
|
|
|
address static_field_addr(int offset);
|
|
|
|
OopMapBlock* start_of_nonstatic_oop_maps() const {
|
|
return (OopMapBlock*)(start_of_itable() + align_object_offset(itable_length()));
|
|
}
|
|
|
|
// Allocation profiling support
|
|
juint alloc_size() const { return _alloc_count * size_helper(); }
|
|
void set_alloc_size(juint n) {}
|
|
|
|
// Use this to return the size of an instance in heap words:
|
|
int size_helper() const {
|
|
return layout_helper_to_size_helper(layout_helper());
|
|
}
|
|
|
|
// This bit is initialized in classFileParser.cpp.
|
|
// It is false under any of the following conditions:
|
|
// - the class is abstract (including any interface)
|
|
// - the class has a finalizer (if !RegisterFinalizersAtInit)
|
|
// - the class size is larger than FastAllocateSizeLimit
|
|
// - the class is java/lang/Class, which cannot be allocated directly
|
|
bool can_be_fastpath_allocated() const {
|
|
return !layout_helper_needs_slow_path(layout_helper());
|
|
}
|
|
|
|
// Java vtable/itable
|
|
klassVtable* vtable() const; // return new klassVtable wrapper
|
|
inline methodOop method_at_vtable(int index);
|
|
klassItable* itable() const; // return new klassItable wrapper
|
|
methodOop method_at_itable(klassOop holder, int index, TRAPS);
|
|
|
|
// Garbage collection
|
|
void oop_follow_contents(oop obj);
|
|
int oop_adjust_pointers(oop obj);
|
|
bool object_is_parsable() const { return _init_state != unparsable_by_gc; }
|
|
// Value of _init_state must be zero (unparsable_by_gc) when klass field is set.
|
|
|
|
void follow_weak_klass_links(
|
|
BoolObjectClosure* is_alive, OopClosure* keep_alive);
|
|
void release_C_heap_structures();
|
|
|
|
// Parallel Scavenge and Parallel Old
|
|
PARALLEL_GC_DECLS
|
|
|
|
// Naming
|
|
const char* signature_name() const;
|
|
|
|
// Iterators
|
|
int oop_oop_iterate(oop obj, OopClosure* blk) {
|
|
return oop_oop_iterate_v(obj, blk);
|
|
}
|
|
|
|
int oop_oop_iterate_m(oop obj, OopClosure* blk, MemRegion mr) {
|
|
return oop_oop_iterate_v_m(obj, blk, mr);
|
|
}
|
|
|
|
#define InstanceKlass_OOP_OOP_ITERATE_DECL(OopClosureType, nv_suffix) \
|
|
int oop_oop_iterate##nv_suffix(oop obj, OopClosureType* blk); \
|
|
int oop_oop_iterate##nv_suffix##_m(oop obj, OopClosureType* blk, \
|
|
MemRegion mr);
|
|
|
|
ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_DECL)
|
|
ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_DECL)
|
|
|
|
#ifndef SERIALGC
|
|
#define InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL(OopClosureType, nv_suffix) \
|
|
int oop_oop_iterate_backwards##nv_suffix(oop obj, OopClosureType* blk);
|
|
|
|
ALL_OOP_OOP_ITERATE_CLOSURES_1(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
|
|
ALL_OOP_OOP_ITERATE_CLOSURES_2(InstanceKlass_OOP_OOP_ITERATE_BACKWARDS_DECL)
|
|
#endif // !SERIALGC
|
|
|
|
private:
|
|
// initialization state
|
|
#ifdef ASSERT
|
|
void set_init_state(ClassState state);
|
|
#else
|
|
void set_init_state(ClassState state) { _init_state = (u1)state; }
|
|
#endif
|
|
void set_rewritten() { _misc_flags |= REWRITTEN; }
|
|
void set_init_thread(Thread *thread) { _init_thread = thread; }
|
|
|
|
u2 idnum_allocated_count() const { return _idnum_allocated_count; }
|
|
// The RedefineClasses() API can cause new method idnums to be needed
|
|
// which will cause the caches to grow. Safety requires different
|
|
// cache management logic if the caches can grow instead of just
|
|
// going from NULL to non-NULL.
|
|
bool idnum_can_increment() const { return has_been_redefined(); }
|
|
jmethodID* methods_jmethod_ids_acquire() const
|
|
{ return (jmethodID*)OrderAccess::load_ptr_acquire(&_methods_jmethod_ids); }
|
|
void release_set_methods_jmethod_ids(jmethodID* jmeths)
|
|
{ OrderAccess::release_store_ptr(&_methods_jmethod_ids, jmeths); }
|
|
|
|
int* methods_cached_itable_indices_acquire() const
|
|
{ return (int*)OrderAccess::load_ptr_acquire(&_methods_cached_itable_indices); }
|
|
void release_set_methods_cached_itable_indices(int* indices)
|
|
{ OrderAccess::release_store_ptr(&_methods_cached_itable_indices, indices); }
|
|
|
|
inline typeArrayOop get_method_annotations_from(int idnum, objArrayOop annos);
|
|
void set_annotations(objArrayOop md, objArrayOop* md_p) { oop_store_without_check((oop*)md_p, (oop)md); }
|
|
void set_methods_annotations_of(int idnum, typeArrayOop anno, objArrayOop* md_p);
|
|
|
|
// Offsets for memory management
|
|
oop* adr_array_klasses() const { return (oop*)&this->_array_klasses;}
|
|
oop* adr_methods() const { return (oop*)&this->_methods;}
|
|
oop* adr_method_ordering() const { return (oop*)&this->_method_ordering;}
|
|
oop* adr_local_interfaces() const { return (oop*)&this->_local_interfaces;}
|
|
oop* adr_transitive_interfaces() const { return (oop*)&this->_transitive_interfaces;}
|
|
oop* adr_fields() const { return (oop*)&this->_fields;}
|
|
oop* adr_constants() const { return (oop*)&this->_constants;}
|
|
oop* adr_class_loader() const { return (oop*)&this->_class_loader;}
|
|
oop* adr_protection_domain() const { return (oop*)&this->_protection_domain;}
|
|
oop* adr_host_klass() const { return (oop*)&this->_host_klass;}
|
|
oop* adr_signers() const { return (oop*)&this->_signers;}
|
|
oop* adr_inner_classes() const { return (oop*)&this->_inner_classes;}
|
|
oop* adr_implementors() const { return (oop*)&this->_implementors[0];}
|
|
oop* adr_methods_jmethod_ids() const { return (oop*)&this->_methods_jmethod_ids;}
|
|
oop* adr_methods_cached_itable_indices() const { return (oop*)&this->_methods_cached_itable_indices;}
|
|
oop* adr_class_annotations() const { return (oop*)&this->_class_annotations;}
|
|
oop* adr_fields_annotations() const { return (oop*)&this->_fields_annotations;}
|
|
oop* adr_methods_annotations() const { return (oop*)&this->_methods_annotations;}
|
|
oop* adr_methods_parameter_annotations() const { return (oop*)&this->_methods_parameter_annotations;}
|
|
oop* adr_methods_default_annotations() const { return (oop*)&this->_methods_default_annotations;}
|
|
|
|
// Static methods that are used to implement member methods where an exposed this pointer
|
|
// is needed due to possible GCs
|
|
static bool link_class_impl (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS);
|
|
static bool verify_code (instanceKlassHandle this_oop, bool throw_verifyerror, TRAPS);
|
|
static void initialize_impl (instanceKlassHandle this_oop, TRAPS);
|
|
static void eager_initialize_impl (instanceKlassHandle this_oop);
|
|
static void set_initialization_state_and_notify_impl (instanceKlassHandle this_oop, ClassState state, TRAPS);
|
|
static void call_class_initializer_impl (instanceKlassHandle this_oop, TRAPS);
|
|
static klassOop array_klass_impl (instanceKlassHandle this_oop, bool or_null, int n, TRAPS);
|
|
static void do_local_static_fields_impl (instanceKlassHandle this_oop, void f(fieldDescriptor* fd, TRAPS), TRAPS);
|
|
/* jni_id_for_impl for jfieldID only */
|
|
static JNIid* jni_id_for_impl (instanceKlassHandle this_oop, int offset);
|
|
|
|
// Returns the array class for the n'th dimension
|
|
klassOop array_klass_impl(bool or_null, int n, TRAPS);
|
|
|
|
// Returns the array class with this class as element type
|
|
klassOop array_klass_impl(bool or_null, TRAPS);
|
|
|
|
public:
|
|
// sharing support
|
|
virtual void remove_unshareable_info();
|
|
virtual void shared_symbols_iterate(SymbolClosure* closure);
|
|
|
|
// jvm support
|
|
jint compute_modifier_flags(TRAPS) const;
|
|
|
|
public:
|
|
// JVMTI support
|
|
jint jvmti_class_status() const;
|
|
|
|
public:
|
|
// Printing
|
|
void oop_print_value_on(oop obj, outputStream* st);
|
|
#ifndef PRODUCT
|
|
void oop_print_on (oop obj, outputStream* st);
|
|
|
|
void print_dependent_nmethods(bool verbose = false);
|
|
bool is_dependent_nmethod(nmethod* nm);
|
|
#endif
|
|
|
|
// Verification
|
|
const char* internal_name() const;
|
|
void oop_verify_on(oop obj, outputStream* st);
|
|
};
|
|
|
|
inline methodOop instanceKlass::method_at_vtable(int index) {
|
|
#ifndef PRODUCT
|
|
assert(index >= 0, "valid vtable index");
|
|
if (DebugVtables) {
|
|
verify_vtable_index(index);
|
|
}
|
|
#endif
|
|
vtableEntry* ve = (vtableEntry*)start_of_vtable();
|
|
return ve[index].method();
|
|
}
|
|
|
|
inline typeArrayOop instanceKlass::get_method_annotations_from(int idnum, objArrayOop annos) {
|
|
if (annos == NULL || annos->length() <= idnum) {
|
|
return NULL;
|
|
}
|
|
return typeArrayOop(annos->obj_at(idnum));
|
|
}
|
|
|
|
// for adding methods
|
|
// UNSET_IDNUM return means no more ids available
|
|
inline u2 instanceKlass::next_method_idnum() {
|
|
if (_idnum_allocated_count == constMethodOopDesc::MAX_IDNUM) {
|
|
return constMethodOopDesc::UNSET_IDNUM; // no more ids available
|
|
} else {
|
|
return _idnum_allocated_count++;
|
|
}
|
|
}
|
|
|
|
|
|
/* JNIid class for jfieldIDs only */
|
|
class JNIid: public CHeapObj {
|
|
friend class VMStructs;
|
|
private:
|
|
klassOop _holder;
|
|
JNIid* _next;
|
|
int _offset;
|
|
#ifdef ASSERT
|
|
bool _is_static_field_id;
|
|
#endif
|
|
|
|
public:
|
|
// Accessors
|
|
klassOop holder() const { return _holder; }
|
|
int offset() const { return _offset; }
|
|
JNIid* next() { return _next; }
|
|
// Constructor
|
|
JNIid(klassOop holder, int offset, JNIid* next);
|
|
// Identifier lookup
|
|
JNIid* find(int offset);
|
|
|
|
bool find_local_field(fieldDescriptor* fd) {
|
|
return instanceKlass::cast(holder())->find_local_field_from_offset(offset(), true, fd);
|
|
}
|
|
|
|
// Garbage collection support
|
|
oop* holder_addr() { return (oop*)&_holder; }
|
|
void oops_do(OopClosure* f);
|
|
static void deallocate(JNIid* id);
|
|
// Debugging
|
|
#ifdef ASSERT
|
|
bool is_static_field_id() const { return _is_static_field_id; }
|
|
void set_is_static_field_id() { _is_static_field_id = true; }
|
|
#endif
|
|
void verify(klassOop holder);
|
|
};
|
|
|
|
|
|
// If breakpoints are more numerous than just JVMTI breakpoints,
|
|
// consider compressing this data structure.
|
|
// It is currently a simple linked list defined in methodOop.hpp.
|
|
|
|
class BreakpointInfo;
|
|
|
|
|
|
// A collection point for interesting information about the previous
|
|
// version(s) of an instanceKlass. This class uses weak references to
|
|
// the information so that the information may be collected as needed
|
|
// by the system. If the information is shared, then a regular
|
|
// reference must be used because a weak reference would be seen as
|
|
// collectible. A GrowableArray of PreviousVersionNodes is attached
|
|
// to the instanceKlass as needed. See PreviousVersionWalker below.
|
|
class PreviousVersionNode : public CHeapObj {
|
|
private:
|
|
// A shared ConstantPool is never collected so we'll always have
|
|
// a reference to it so we can update items in the cache. We'll
|
|
// have a weak reference to a non-shared ConstantPool until all
|
|
// of the methods (EMCP or obsolete) have been collected; the
|
|
// non-shared ConstantPool becomes collectible at that point.
|
|
jobject _prev_constant_pool; // regular or weak reference
|
|
bool _prev_cp_is_weak; // true if not a shared ConstantPool
|
|
|
|
// If the previous version of the instanceKlass doesn't have any
|
|
// EMCP methods, then _prev_EMCP_methods will be NULL. If all the
|
|
// EMCP methods have been collected, then _prev_EMCP_methods can
|
|
// have a length of zero.
|
|
GrowableArray<jweak>* _prev_EMCP_methods;
|
|
|
|
public:
|
|
PreviousVersionNode(jobject prev_constant_pool, bool prev_cp_is_weak,
|
|
GrowableArray<jweak>* prev_EMCP_methods);
|
|
~PreviousVersionNode();
|
|
jobject prev_constant_pool() const {
|
|
return _prev_constant_pool;
|
|
}
|
|
GrowableArray<jweak>* prev_EMCP_methods() const {
|
|
return _prev_EMCP_methods;
|
|
}
|
|
};
|
|
|
|
|
|
// A Handle-ized version of PreviousVersionNode.
|
|
class PreviousVersionInfo : public ResourceObj {
|
|
private:
|
|
constantPoolHandle _prev_constant_pool_handle;
|
|
// If the previous version of the instanceKlass doesn't have any
|
|
// EMCP methods, then _prev_EMCP_methods will be NULL. Since the
|
|
// methods cannot be collected while we hold a handle,
|
|
// _prev_EMCP_methods should never have a length of zero.
|
|
GrowableArray<methodHandle>* _prev_EMCP_method_handles;
|
|
|
|
public:
|
|
PreviousVersionInfo(PreviousVersionNode *pv_node);
|
|
~PreviousVersionInfo();
|
|
constantPoolHandle prev_constant_pool_handle() const {
|
|
return _prev_constant_pool_handle;
|
|
}
|
|
GrowableArray<methodHandle>* prev_EMCP_method_handles() const {
|
|
return _prev_EMCP_method_handles;
|
|
}
|
|
};
|
|
|
|
|
|
// Helper object for walking previous versions. This helper cleans up
|
|
// the Handles that it allocates when the helper object is destroyed.
|
|
// The PreviousVersionInfo object returned by next_previous_version()
|
|
// is only valid until a subsequent call to next_previous_version() or
|
|
// the helper object is destroyed.
|
|
class PreviousVersionWalker : public StackObj {
|
|
private:
|
|
GrowableArray<PreviousVersionNode *>* _previous_versions;
|
|
int _current_index;
|
|
// Fields for cleaning up when we are done walking the previous versions:
|
|
// A HandleMark for the PreviousVersionInfo handles:
|
|
HandleMark _hm;
|
|
|
|
// It would be nice to have a ResourceMark field in this helper also,
|
|
// but the ResourceMark code says to be careful to delete handles held
|
|
// in GrowableArrays _before_ deleting the GrowableArray. Since we
|
|
// can't guarantee the order in which the fields are destroyed, we
|
|
// have to let the creator of the PreviousVersionWalker object do
|
|
// the right thing. Also, adding a ResourceMark here causes an
|
|
// include loop.
|
|
|
|
// A pointer to the current info object so we can handle the deletes.
|
|
PreviousVersionInfo * _current_p;
|
|
|
|
public:
|
|
PreviousVersionWalker(instanceKlass *ik);
|
|
~PreviousVersionWalker();
|
|
|
|
// Return the interesting information for the next previous version
|
|
// of the klass. Returns NULL if there are no more previous versions.
|
|
PreviousVersionInfo* next_previous_version();
|
|
};
|
|
|
|
|
|
//
|
|
// nmethodBucket is used to record dependent nmethods for
|
|
// deoptimization. nmethod dependencies are actually <klass, method>
|
|
// pairs but we really only care about the klass part for purposes of
|
|
// finding nmethods which might need to be deoptimized. Instead of
|
|
// recording the method, a count of how many times a particular nmethod
|
|
// was recorded is kept. This ensures that any recording errors are
|
|
// noticed since an nmethod should be removed as many times are it's
|
|
// added.
|
|
//
|
|
class nmethodBucket: public CHeapObj {
|
|
friend class VMStructs;
|
|
private:
|
|
nmethod* _nmethod;
|
|
int _count;
|
|
nmethodBucket* _next;
|
|
|
|
public:
|
|
nmethodBucket(nmethod* nmethod, nmethodBucket* next) {
|
|
_nmethod = nmethod;
|
|
_next = next;
|
|
_count = 1;
|
|
}
|
|
int count() { return _count; }
|
|
int increment() { _count += 1; return _count; }
|
|
int decrement() { _count -= 1; assert(_count >= 0, "don't underflow"); return _count; }
|
|
nmethodBucket* next() { return _next; }
|
|
void set_next(nmethodBucket* b) { _next = b; }
|
|
nmethod* get_nmethod() { return _nmethod; }
|
|
};
|
|
|
|
#endif // SHARE_VM_OOPS_INSTANCEKLASS_HPP
|