hotspot/src/share/vm/memory/serialize.cpp
author coleenp
Thu, 27 Jan 2011 16:11:27 -0800
changeset 8076 96d498ec7ae1
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child 8921 14bfe81f2a9d
permissions -rw-r--r--
6990754: Use native memory and reference counting to implement SymbolTable Summary: move symbols from permgen into C heap and reference count them Reviewed-by: never, acorn, jmasa, stefank
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/*
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 * Copyright (c) 2003, 2010, 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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#include "precompiled.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "code/codeCache.hpp"
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#include "memory/classify.hpp"
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#include "memory/compactingPermGenGen.hpp"
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#include "oops/compiledICHolderOop.hpp"
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#include "oops/methodDataOop.hpp"
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#include "oops/objArrayOop.hpp"
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#include "oops/oop.inline.hpp"
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// Serialize out the block offset shared array for the shared spaces.
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void CompactingPermGenGen::serialize_bts(SerializeOopClosure* soc) {
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  _ro_bts->serialize(soc, readonly_bottom, readonly_end);
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  _rw_bts->serialize(soc, readwrite_bottom, readwrite_end);
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}
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// Read/write a data stream for restoring/preserving oop pointers and
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// miscellaneous data from/to the shared archive file.
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void CompactingPermGenGen::serialize_oops(SerializeOopClosure* soc) {
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  int tag = 0;
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  soc->do_tag(--tag);
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  assert(!UseCompressedOops, "UseCompressedOops doesn't work with shared archive");
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  // Verify the sizes of various oops in the system.
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  soc->do_tag(sizeof(oopDesc));
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  soc->do_tag(sizeof(instanceOopDesc));
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  soc->do_tag(sizeof(methodOopDesc));
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  soc->do_tag(sizeof(constMethodOopDesc));
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  soc->do_tag(sizeof(methodDataOopDesc));
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  soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
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  soc->do_tag(sizeof(constantPoolOopDesc));
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  soc->do_tag(sizeof(constantPoolCacheOopDesc));
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  soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
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  soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
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  soc->do_tag(sizeof(Symbol));
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  soc->do_tag(sizeof(klassOopDesc));
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  soc->do_tag(sizeof(markOopDesc));
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  soc->do_tag(sizeof(compiledICHolderOopDesc));
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  // Dump the block offset table entries.
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  GenCollectedHeap* gch = GenCollectedHeap::heap();
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  CompactingPermGenGen* pg = (CompactingPermGenGen*)gch->perm_gen();
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  pg->serialize_bts(soc);
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  soc->do_tag(--tag);
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  pg->ro_space()->serialize_block_offset_array_offsets(soc);
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  soc->do_tag(--tag);
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  pg->rw_space()->serialize_block_offset_array_offsets(soc);
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  soc->do_tag(--tag);
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  // Special case - this oop needed in oop->is_oop() assertions.
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  soc->do_ptr((void**)&Universe::_klassKlassObj);
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  soc->do_tag(--tag);
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  // Dump/restore miscellaneous oops.
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  Universe::oops_do(soc, true);
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  soc->do_tag(--tag);
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  CodeCache::oops_do(soc);
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  soc->do_tag(--tag);
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  // Dump/restore references to commonly used names and signatures.
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  vmSymbols::serialize(soc);
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  soc->do_tag(--tag);
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  soc->do_tag(666);
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}