hotspot/src/share/vm/memory/serialize.cpp
author coleenp
Sun, 13 Apr 2008 17:43:42 -0400
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parent 1 489c9b5090e2
child 670 ddf3e9583f2f
permissions -rw-r--r--
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
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/*
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 * Copyright 2003-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 *
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 */
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# include "incls/_precompiled.incl"
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# include "incls/_serialize.cpp.incl"
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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(T_BYTE));
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  soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
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  soc->do_tag(sizeof(symbolOopDesc));
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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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  vmSymbols::oops_do(soc, true);               soc->do_tag(--tag);
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  CodeCache::oops_do(soc);                     soc->do_tag(--tag);
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  soc->do_tag(666);
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}