author | johnc |
Tue, 14 Jun 2011 11:01:10 -0700 | |
changeset 9995 | 290620c08233 |
parent 8921 | 14bfe81f2a9d |
child 10265 | 4c869854aebd |
permissions | -rw-r--r-- |
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/* |
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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_MEMORY_UNIVERSE_HPP |
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#define SHARE_VM_MEMORY_UNIVERSE_HPP |
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#include "runtime/handles.hpp" |
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#include "utilities/growableArray.hpp" |
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// Universe is a name space holding known system classes and objects in the VM. |
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// |
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// Loaded classes are accessible through the SystemDictionary. |
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// |
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// The object heap is allocated and accessed through Universe, and various allocation |
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// support is provided. Allocation by the interpreter and compiled code is done inline |
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// and bails out to Scavenge::invoke_and_allocate. |
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class CollectedHeap; |
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class DeferredObjAllocEvent; |
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// Common parts of a methodOop cache. This cache safely interacts with |
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// the RedefineClasses API. |
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// |
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class CommonMethodOopCache : public CHeapObj { |
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// We save the klassOop and the idnum of methodOop in order to get |
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// the current cached methodOop. |
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private: |
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klassOop _klass; |
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int _method_idnum; |
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public: |
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CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } |
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~CommonMethodOopCache() { _klass = NULL; _method_idnum = -1; } |
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void init(klassOop k, methodOop m, TRAPS); |
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klassOop klass() const { return _klass; } |
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int method_idnum() const { return _method_idnum; } |
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// GC support |
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void oops_do(OopClosure* f) { f->do_oop((oop*)&_klass); } |
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}; |
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// A helper class for caching a methodOop when the user of the cache |
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// cares about all versions of the methodOop. |
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// |
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class ActiveMethodOopsCache : public CommonMethodOopCache { |
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// This subclass adds weak references to older versions of the |
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// methodOop and a query method for a methodOop. |
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private: |
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// If the cached methodOop has not been redefined, then |
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// _prev_methods will be NULL. If all of the previous |
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// versions of the method have been collected, then |
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// _prev_methods can have a length of zero. |
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GrowableArray<jweak>* _prev_methods; |
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public: |
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ActiveMethodOopsCache() { _prev_methods = NULL; } |
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~ActiveMethodOopsCache(); |
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void add_previous_version(const methodOop method); |
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bool is_same_method(const methodOop method) const; |
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}; |
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// A helper class for caching a methodOop when the user of the cache |
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// only cares about the latest version of the methodOop. |
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// |
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class LatestMethodOopCache : public CommonMethodOopCache { |
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// This subclass adds a getter method for the latest methodOop. |
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public: |
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methodOop get_methodOop(); |
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}; |
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// For UseCompressedOops. |
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struct NarrowOopStruct { |
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// Base address for oop-within-java-object materialization. |
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// NULL if using wide oops or zero based narrow oops. |
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address _base; |
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// Number of shift bits for encoding/decoding narrow oops. |
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// 0 if using wide oops or zero based unscaled narrow oops, |
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// LogMinObjAlignmentInBytes otherwise. |
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int _shift; |
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// Generate code with implicit null checks for narrow oops. |
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bool _use_implicit_null_checks; |
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}; |
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enum VerifyOption { |
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VerifyOption_Default = 0, |
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// G1 |
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VerifyOption_G1UsePrevMarking = VerifyOption_Default, |
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VerifyOption_G1UseNextMarking = VerifyOption_G1UsePrevMarking + 1, |
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VerifyOption_G1UseMarkWord = VerifyOption_G1UseNextMarking + 1 |
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}; |
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class Universe: AllStatic { |
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// Ugh. Universe is much too friendly. |
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friend class MarkSweep; |
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friend class oopDesc; |
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friend class ClassLoader; |
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friend class Arguments; |
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friend class SystemDictionary; |
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friend class VMStructs; |
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friend class CompactingPermGenGen; |
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friend class VM_PopulateDumpSharedSpace; |
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friend jint universe_init(); |
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friend void universe2_init(); |
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friend bool universe_post_init(); |
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private: |
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// Known classes in the VM |
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static klassOop _boolArrayKlassObj; |
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static klassOop _byteArrayKlassObj; |
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static klassOop _charArrayKlassObj; |
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static klassOop _intArrayKlassObj; |
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static klassOop _shortArrayKlassObj; |
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static klassOop _longArrayKlassObj; |
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static klassOop _singleArrayKlassObj; |
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static klassOop _doubleArrayKlassObj; |
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static klassOop _typeArrayKlassObjs[T_VOID+1]; |
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static klassOop _objectArrayKlassObj; |
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static klassOop _methodKlassObj; |
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static klassOop _constMethodKlassObj; |
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static klassOop _methodDataKlassObj; |
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static klassOop _klassKlassObj; |
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static klassOop _arrayKlassKlassObj; |
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static klassOop _objArrayKlassKlassObj; |
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static klassOop _typeArrayKlassKlassObj; |
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static klassOop _instanceKlassKlassObj; |
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static klassOop _constantPoolKlassObj; |
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static klassOop _constantPoolCacheKlassObj; |
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static klassOop _compiledICHolderKlassObj; |
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static klassOop _systemObjArrayKlassObj; |
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// Known objects in the VM |
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// Primitive objects |
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static oop _int_mirror; |
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static oop _float_mirror; |
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static oop _double_mirror; |
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static oop _byte_mirror; |
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static oop _bool_mirror; |
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static oop _char_mirror; |
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static oop _long_mirror; |
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static oop _short_mirror; |
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static oop _void_mirror; |
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static oop _main_thread_group; // Reference to the main thread group object |
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static oop _system_thread_group; // Reference to the system thread group object |
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static typeArrayOop _the_empty_byte_array; // Canonicalized byte array |
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static typeArrayOop _the_empty_short_array; // Canonicalized short array |
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static typeArrayOop _the_empty_int_array; // Canonicalized int array |
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static objArrayOop _the_empty_system_obj_array; // Canonicalized system obj array |
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static objArrayOop _the_empty_class_klass_array; // Canonicalized obj array of type java.lang.Class |
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static objArrayOop _the_array_interfaces_array; // Canonicalized 2-array of cloneable & serializable klasses |
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static oop _the_null_string; // A cache of "null" as a Java string |
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static oop _the_min_jint_string; // A cache of "-2147483648" as a Java string |
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static LatestMethodOopCache* _finalizer_register_cache; // static method for registering finalizable objects |
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static LatestMethodOopCache* _loader_addClass_cache; // method for registering loaded classes in class loader vector |
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static ActiveMethodOopsCache* _reflect_invoke_cache; // method for security checks |
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static oop _out_of_memory_error_java_heap; // preallocated error object (no backtrace) |
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static oop _out_of_memory_error_perm_gen; // preallocated error object (no backtrace) |
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static oop _out_of_memory_error_array_size;// preallocated error object (no backtrace) |
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static oop _out_of_memory_error_gc_overhead_limit; // preallocated error object (no backtrace) |
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// array of preallocated error objects with backtrace |
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static objArrayOop _preallocated_out_of_memory_error_array; |
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// number of preallocated error objects available for use |
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static volatile jint _preallocated_out_of_memory_error_avail_count; |
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static oop _null_ptr_exception_instance; // preallocated exception object |
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static oop _arithmetic_exception_instance; // preallocated exception object |
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static oop _virtual_machine_error_instance; // preallocated exception object |
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// The object used as an exception dummy when exceptions are thrown for |
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// the vm thread. |
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static oop _vm_exception; |
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// The particular choice of collected heap. |
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static CollectedHeap* _collectedHeap; |
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// For UseCompressedOops. |
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static struct NarrowOopStruct _narrow_oop; |
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// array of dummy objects used with +FullGCAlot |
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debug_only(static objArrayOop _fullgc_alot_dummy_array;) |
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// index of next entry to clear |
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debug_only(static int _fullgc_alot_dummy_next;) |
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// Compiler/dispatch support |
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static int _base_vtable_size; // Java vtbl size of klass Object (in words) |
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// Initialization |
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static bool _bootstrapping; // true during genesis |
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static bool _fully_initialized; // true after universe_init and initialize_vtables called |
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// the array of preallocated errors with backtraces |
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static objArrayOop preallocated_out_of_memory_errors() { return _preallocated_out_of_memory_error_array; } |
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// generate an out of memory error; if possible using an error with preallocated backtrace; |
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// otherwise return the given default error. |
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static oop gen_out_of_memory_error(oop default_err); |
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// Historic gc information |
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static size_t _heap_capacity_at_last_gc; |
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static size_t _heap_used_at_last_gc; |
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static jint initialize_heap(); |
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static void initialize_basic_type_mirrors(TRAPS); |
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static void fixup_mirrors(TRAPS); |
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static void reinitialize_vtable_of(KlassHandle h_k, TRAPS); |
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static void reinitialize_itables(TRAPS); |
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static void compute_base_vtable_size(); // compute vtable size of class Object |
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static void genesis(TRAPS); // Create the initial world |
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// Mirrors for primitive classes (created eagerly) |
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static oop check_mirror(oop m) { |
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assert(m != NULL, "mirror not initialized"); |
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return m; |
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} |
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// Debugging |
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static int _verify_count; // number of verifies done |
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// True during call to verify(). Should only be set/cleared in verify(). |
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static bool _verify_in_progress; |
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static void compute_verify_oop_data(); |
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public: |
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// Known classes in the VM |
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static klassOop boolArrayKlassObj() { return _boolArrayKlassObj; } |
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static klassOop byteArrayKlassObj() { return _byteArrayKlassObj; } |
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static klassOop charArrayKlassObj() { return _charArrayKlassObj; } |
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static klassOop intArrayKlassObj() { return _intArrayKlassObj; } |
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static klassOop shortArrayKlassObj() { return _shortArrayKlassObj; } |
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static klassOop longArrayKlassObj() { return _longArrayKlassObj; } |
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static klassOop singleArrayKlassObj() { return _singleArrayKlassObj; } |
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static klassOop doubleArrayKlassObj() { return _doubleArrayKlassObj; } |
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static klassOop objectArrayKlassObj() { |
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return _objectArrayKlassObj; |
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} |
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static klassOop typeArrayKlassObj(BasicType t) { |
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assert((uint)t < T_VOID+1, "range check"); |
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assert(_typeArrayKlassObjs[t] != NULL, "domain check"); |
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return _typeArrayKlassObjs[t]; |
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} |
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static klassOop methodKlassObj() { return _methodKlassObj; } |
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static klassOop constMethodKlassObj() { return _constMethodKlassObj; } |
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static klassOop methodDataKlassObj() { return _methodDataKlassObj; } |
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static klassOop klassKlassObj() { return _klassKlassObj; } |
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static klassOop arrayKlassKlassObj() { return _arrayKlassKlassObj; } |
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static klassOop objArrayKlassKlassObj() { return _objArrayKlassKlassObj; } |
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static klassOop typeArrayKlassKlassObj() { return _typeArrayKlassKlassObj; } |
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static klassOop instanceKlassKlassObj() { return _instanceKlassKlassObj; } |
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static klassOop constantPoolKlassObj() { return _constantPoolKlassObj; } |
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static klassOop constantPoolCacheKlassObj() { return _constantPoolCacheKlassObj; } |
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static klassOop compiledICHolderKlassObj() { return _compiledICHolderKlassObj; } |
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static klassOop systemObjArrayKlassObj() { return _systemObjArrayKlassObj; } |
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// Known objects in the VM |
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static oop int_mirror() { return check_mirror(_int_mirror); } |
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static oop float_mirror() { return check_mirror(_float_mirror); } |
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static oop double_mirror() { return check_mirror(_double_mirror); } |
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static oop byte_mirror() { return check_mirror(_byte_mirror); } |
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static oop bool_mirror() { return check_mirror(_bool_mirror); } |
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static oop char_mirror() { return check_mirror(_char_mirror); } |
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static oop long_mirror() { return check_mirror(_long_mirror); } |
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static oop short_mirror() { return check_mirror(_short_mirror); } |
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static oop void_mirror() { return check_mirror(_void_mirror); } |
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// table of same |
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static oop _mirrors[T_VOID+1]; |
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static oop java_mirror(BasicType t) { |
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assert((uint)t < T_VOID+1, "range check"); |
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return check_mirror(_mirrors[t]); |
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} |
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static oop main_thread_group() { return _main_thread_group; } |
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static void set_main_thread_group(oop group) { _main_thread_group = group;} |
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static oop system_thread_group() { return _system_thread_group; } |
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static void set_system_thread_group(oop group) { _system_thread_group = group;} |
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static typeArrayOop the_empty_byte_array() { return _the_empty_byte_array; } |
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static typeArrayOop the_empty_short_array() { return _the_empty_short_array; } |
|
320 |
static typeArrayOop the_empty_int_array() { return _the_empty_int_array; } |
|
321 |
static objArrayOop the_empty_system_obj_array () { return _the_empty_system_obj_array; } |
|
322 |
static objArrayOop the_empty_class_klass_array () { return _the_empty_class_klass_array; } |
|
323 |
static objArrayOop the_array_interfaces_array() { return _the_array_interfaces_array; } |
|
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static oop the_null_string() { return _the_null_string; } |
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325 |
static oop the_min_jint_string() { return _the_min_jint_string; } |
1 | 326 |
static methodOop finalizer_register_method() { return _finalizer_register_cache->get_methodOop(); } |
327 |
static methodOop loader_addClass_method() { return _loader_addClass_cache->get_methodOop(); } |
|
328 |
static ActiveMethodOopsCache* reflect_invoke_cache() { return _reflect_invoke_cache; } |
|
329 |
static oop null_ptr_exception_instance() { return _null_ptr_exception_instance; } |
|
330 |
static oop arithmetic_exception_instance() { return _arithmetic_exception_instance; } |
|
331 |
static oop virtual_machine_error_instance() { return _virtual_machine_error_instance; } |
|
332 |
static oop vm_exception() { return _vm_exception; } |
|
333 |
||
334 |
// OutOfMemoryError support. Returns an error with the required message. The returned error |
|
335 |
// may or may not have a backtrace. If error has a backtrace then the stack trace is already |
|
336 |
// filled in. |
|
337 |
static oop out_of_memory_error_java_heap() { return gen_out_of_memory_error(_out_of_memory_error_java_heap); } |
|
338 |
static oop out_of_memory_error_perm_gen() { return gen_out_of_memory_error(_out_of_memory_error_perm_gen); } |
|
339 |
static oop out_of_memory_error_array_size() { return gen_out_of_memory_error(_out_of_memory_error_array_size); } |
|
340 |
static oop out_of_memory_error_gc_overhead_limit() { return gen_out_of_memory_error(_out_of_memory_error_gc_overhead_limit); } |
|
341 |
||
342 |
// Accessors needed for fast allocation |
|
343 |
static klassOop* boolArrayKlassObj_addr() { return &_boolArrayKlassObj; } |
|
344 |
static klassOop* byteArrayKlassObj_addr() { return &_byteArrayKlassObj; } |
|
345 |
static klassOop* charArrayKlassObj_addr() { return &_charArrayKlassObj; } |
|
346 |
static klassOop* intArrayKlassObj_addr() { return &_intArrayKlassObj; } |
|
347 |
static klassOop* shortArrayKlassObj_addr() { return &_shortArrayKlassObj; } |
|
348 |
static klassOop* longArrayKlassObj_addr() { return &_longArrayKlassObj; } |
|
349 |
static klassOop* singleArrayKlassObj_addr() { return &_singleArrayKlassObj; } |
|
350 |
static klassOop* doubleArrayKlassObj_addr() { return &_doubleArrayKlassObj; } |
|
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351 |
static klassOop* systemObjArrayKlassObj_addr() { return &_systemObjArrayKlassObj; } |
1 | 352 |
|
353 |
// The particular choice of collected heap. |
|
354 |
static CollectedHeap* heap() { return _collectedHeap; } |
|
355 |
||
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356 |
// For UseCompressedOops |
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static address* narrow_oop_base_addr() { return &_narrow_oop._base; } |
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358 |
static address narrow_oop_base() { return _narrow_oop._base; } |
3275 | 359 |
static bool is_narrow_oop_base(void* addr) { return (narrow_oop_base() == (address)addr); } |
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static int narrow_oop_shift() { return _narrow_oop._shift; } |
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361 |
static void set_narrow_oop_base(address base) { _narrow_oop._base = base; } |
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362 |
static void set_narrow_oop_shift(int shift) { _narrow_oop._shift = shift; } |
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363 |
static bool narrow_oop_use_implicit_null_checks() { return _narrow_oop._use_implicit_null_checks; } |
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364 |
static void set_narrow_oop_use_implicit_null_checks(bool use) { _narrow_oop._use_implicit_null_checks = use; } |
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|
365 |
// Narrow Oop encoding mode: |
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366 |
// 0 - Use 32-bits oops without encoding when |
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367 |
// NarrowOopHeapBaseMin + heap_size < 4Gb |
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368 |
// 1 - Use zero based compressed oops with encoding when |
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// NarrowOopHeapBaseMin + heap_size < 32Gb |
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370 |
// 2 - Use compressed oops with heap base + encoding. |
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|
371 |
enum NARROW_OOP_MODE { |
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|
372 |
UnscaledNarrowOop = 0, |
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|
373 |
ZeroBasedNarrowOop = 1, |
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374 |
HeapBasedNarrowOop = 2 |
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|
375 |
}; |
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|
376 |
static char* preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode); |
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|
377 |
|
1 | 378 |
// Historic gc information |
379 |
static size_t get_heap_capacity_at_last_gc() { return _heap_capacity_at_last_gc; } |
|
380 |
static size_t get_heap_free_at_last_gc() { return _heap_capacity_at_last_gc - _heap_used_at_last_gc; } |
|
381 |
static size_t get_heap_used_at_last_gc() { return _heap_used_at_last_gc; } |
|
382 |
static void update_heap_info_at_gc(); |
|
383 |
||
384 |
// Testers |
|
385 |
static bool is_bootstrapping() { return _bootstrapping; } |
|
386 |
static bool is_fully_initialized() { return _fully_initialized; } |
|
387 |
||
388 |
static inline bool element_type_should_be_aligned(BasicType type); |
|
389 |
static inline bool field_type_should_be_aligned(BasicType type); |
|
390 |
static bool on_page_boundary(void* addr); |
|
391 |
static bool should_fill_in_stack_trace(Handle throwable); |
|
392 |
static void check_alignment(uintx size, uintx alignment, const char* name); |
|
393 |
||
394 |
// Finalizer support. |
|
395 |
static void run_finalizers_on_exit(); |
|
396 |
||
397 |
// Iteration |
|
398 |
||
399 |
// Apply "f" to the addresses of all the direct heap pointers maintained |
|
400 |
// as static fields of "Universe". |
|
401 |
static void oops_do(OopClosure* f, bool do_all = false); |
|
402 |
||
403 |
// Apply "f" to all klasses for basic types (classes not present in |
|
404 |
// SystemDictionary). |
|
405 |
static void basic_type_classes_do(void f(klassOop)); |
|
406 |
||
407 |
// Apply "f" to all system klasses (classes not present in SystemDictionary). |
|
408 |
static void system_classes_do(void f(klassOop)); |
|
409 |
||
410 |
// For sharing -- fill in a list of known vtable pointers. |
|
411 |
static void init_self_patching_vtbl_list(void** list, int count); |
|
412 |
||
413 |
// Debugging |
|
414 |
static bool verify_in_progress() { return _verify_in_progress; } |
|
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|
415 |
static void verify(bool allow_dirty = true, bool silent = false, |
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|
416 |
VerifyOption option = VerifyOption_Default ); |
1 | 417 |
static int verify_count() { return _verify_count; } |
418 |
static void print(); |
|
419 |
static void print_on(outputStream* st); |
|
420 |
static void print_heap_at_SIGBREAK(); |
|
421 |
static void print_heap_before_gc() { print_heap_before_gc(gclog_or_tty); } |
|
422 |
static void print_heap_after_gc() { print_heap_after_gc(gclog_or_tty); } |
|
423 |
static void print_heap_before_gc(outputStream* st); |
|
424 |
static void print_heap_after_gc(outputStream* st); |
|
425 |
||
426 |
// Change the number of dummy objects kept reachable by the full gc dummy |
|
427 |
// array; this should trigger relocation in a sliding compaction collector. |
|
428 |
debug_only(static bool release_fullgc_alot_dummy();) |
|
429 |
// The non-oop pattern (see compiledIC.hpp, etc) |
|
430 |
static void* non_oop_word(); |
|
431 |
||
432 |
// Oop verification (see MacroAssembler::verify_oop) |
|
433 |
static uintptr_t verify_oop_mask() PRODUCT_RETURN0; |
|
434 |
static uintptr_t verify_oop_bits() PRODUCT_RETURN0; |
|
435 |
static uintptr_t verify_mark_bits() PRODUCT_RETURN0; |
|
436 |
static uintptr_t verify_mark_mask() PRODUCT_RETURN0; |
|
437 |
static uintptr_t verify_klass_mask() PRODUCT_RETURN0; |
|
438 |
static uintptr_t verify_klass_bits() PRODUCT_RETURN0; |
|
439 |
||
440 |
// Flushing and deoptimization |
|
441 |
static void flush_dependents_on(instanceKlassHandle dependee); |
|
442 |
#ifdef HOTSWAP |
|
443 |
// Flushing and deoptimization in case of evolution |
|
444 |
static void flush_evol_dependents_on(instanceKlassHandle dependee); |
|
445 |
#endif // HOTSWAP |
|
446 |
// Support for fullspeed debugging |
|
447 |
static void flush_dependents_on_method(methodHandle dependee); |
|
448 |
||
449 |
// Compiler support |
|
450 |
static int base_vtable_size() { return _base_vtable_size; } |
|
451 |
}; |
|
452 |
||
453 |
class DeferredObjAllocEvent : public CHeapObj { |
|
454 |
private: |
|
455 |
oop _oop; |
|
456 |
size_t _bytesize; |
|
457 |
jint _arena_id; |
|
458 |
||
459 |
public: |
|
460 |
DeferredObjAllocEvent(const oop o, const size_t s, const jint id) { |
|
461 |
_oop = o; |
|
462 |
_bytesize = s; |
|
463 |
_arena_id = id; |
|
464 |
} |
|
465 |
||
466 |
~DeferredObjAllocEvent() { |
|
467 |
} |
|
468 |
||
469 |
jint arena_id() { return _arena_id; } |
|
470 |
size_t bytesize() { return _bytesize; } |
|
471 |
oop get_oop() { return _oop; } |
|
472 |
}; |
|
7397 | 473 |
|
474 |
#endif // SHARE_VM_MEMORY_UNIVERSE_HPP |