4f42f17d9e
A large part of time in the parallel scavenge collector is spent finding out the amount of live words within memory ranges to find out where to move an object to. Try to incrementally calculate this value. Reviewed-by: tschatzl, mgerdin, jmasa
98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
/*
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* Copyright (c) 2011, 2016, 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_INSTANCECLASSLOADERKLASS_HPP
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#define SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
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#include "gc/shared/specialized_oop_closures.hpp"
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#include "oops/instanceKlass.hpp"
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#include "utilities/macros.hpp"
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class ClassFileParser;
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// An InstanceClassLoaderKlass is a specialization of the InstanceKlass. It does
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// not add any field. It is added to walk the dependencies for the class loader
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// key that this class loader points to. This is how the loader_data graph is
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// walked and dependant class loaders are kept alive. I thought we walked
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// the list later?
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class InstanceClassLoaderKlass: public InstanceKlass {
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friend class VMStructs;
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friend class InstanceKlass;
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private:
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InstanceClassLoaderKlass(const ClassFileParser& parser) : InstanceKlass(parser, InstanceKlass::_misc_kind_class_loader) {}
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public:
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InstanceClassLoaderKlass() { assert(DumpSharedSpaces || UseSharedSpaces, "only for CDS"); }
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// GC specific object visitors
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//
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// Mark Sweep
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int oop_ms_adjust_pointers(oop obj);
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#if INCLUDE_ALL_GCS
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// Parallel Scavenge
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void oop_ps_push_contents( oop obj, PSPromotionManager* pm);
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// Parallel Compact
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void oop_pc_follow_contents(oop obj, ParCompactionManager* cm);
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void oop_pc_update_pointers(oop obj, ParCompactionManager* cm);
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#endif
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// Oop fields (and metadata) iterators
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// [nv = true] Use non-virtual calls to do_oop_nv.
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// [nv = false] Use virtual calls to do_oop.
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//
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// The InstanceClassLoaderKlass iterators also visit the CLD pointer (or mirror of anonymous klasses.)
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private:
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// Forward iteration
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// Iterate over the oop fields and metadata.
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template <bool nv, class OopClosureType>
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inline void oop_oop_iterate(oop obj, OopClosureType* closure);
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#if INCLUDE_ALL_GCS
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// Reverse iteration
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// Iterate over the oop fields and metadata.
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template <bool nv, class OopClosureType>
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inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure);
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#endif
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// Bounded range iteration
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// Iterate over the oop fields and metadata.
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template <bool nv, class OopClosureType>
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inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
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public:
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ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL)
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ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL)
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#if INCLUDE_ALL_GCS
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ALL_OOP_OOP_ITERATE_CLOSURES_1(OOP_OOP_ITERATE_DECL_BACKWARDS)
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ALL_OOP_OOP_ITERATE_CLOSURES_2(OOP_OOP_ITERATE_DECL_BACKWARDS)
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#endif // INCLUDE_ALL_GCS
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};
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#endif // SHARE_VM_OOPS_INSTANCECLASSLOADERKLASS_HPP
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