1 /*
   2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/symbolTable.hpp"
  27 #include "classfile/systemDictionary.hpp"
  28 #include "code/codeCache.hpp"
  29 #include "memory/classify.hpp"
  30 #include "memory/compactingPermGenGen.hpp"
  31 #include "oops/compiledICHolderOop.hpp"
  32 #include "oops/methodDataOop.hpp"
  33 #include "oops/objArrayOop.hpp"
  34 #include "oops/oop.inline.hpp"
  35 
  36 
  37 // Serialize out the block offset shared array for the shared spaces.
  38 
  39 void CompactingPermGenGen::serialize_bts(SerializeOopClosure* soc) {
  40   _ro_bts->serialize(soc, readonly_bottom, readonly_end);
  41   _rw_bts->serialize(soc, readwrite_bottom, readwrite_end);
  42 }
  43 
  44 
  45 // Read/write a data stream for restoring/preserving oop pointers and
  46 // miscellaneous data from/to the shared archive file.
  47 
  48 void CompactingPermGenGen::serialize_oops(SerializeOopClosure* soc) {
  49   int tag = 0;
  50   soc->do_tag(--tag);
  51 
  52   assert(!UseCompressedOops, "UseCompressedOops doesn't work with shared archive");
  53   // Verify the sizes of various oops in the system.
  54   soc->do_tag(sizeof(oopDesc));
  55   soc->do_tag(sizeof(instanceOopDesc));
  56   soc->do_tag(sizeof(methodOopDesc));
  57   soc->do_tag(sizeof(constMethodOopDesc));
  58   soc->do_tag(sizeof(methodDataOopDesc));
  59   soc->do_tag(arrayOopDesc::base_offset_in_bytes(T_BYTE));
  60   soc->do_tag(sizeof(constantPoolOopDesc));
  61   soc->do_tag(sizeof(constantPoolCacheOopDesc));
  62   soc->do_tag(objArrayOopDesc::base_offset_in_bytes());
  63   soc->do_tag(typeArrayOopDesc::base_offset_in_bytes(T_BYTE));
  64   soc->do_tag(sizeof(symbolOopDesc));
  65   soc->do_tag(sizeof(klassOopDesc));
  66   soc->do_tag(sizeof(markOopDesc));
  67   soc->do_tag(sizeof(compiledICHolderOopDesc));
  68 
  69   // Dump the block offset table entries.
  70   GenCollectedHeap* gch = GenCollectedHeap::heap();
  71   CompactingPermGenGen* pg = (CompactingPermGenGen*)gch->perm_gen();
  72   pg->serialize_bts(soc);
  73   soc->do_tag(--tag);
  74   pg->ro_space()->serialize_block_offset_array_offsets(soc);
  75   soc->do_tag(--tag);
  76   pg->rw_space()->serialize_block_offset_array_offsets(soc);
  77   soc->do_tag(--tag);
  78 
  79   // Special case - this oop needed in oop->is_oop() assertions.
  80   soc->do_ptr((void**)&Universe::_klassKlassObj);
  81   soc->do_tag(--tag);
  82 
  83   // Dump/restore miscellaneous oops.
  84   Universe::oops_do(soc, true);
  85   soc->do_tag(--tag);
  86 
  87   vmSymbols::oops_do(soc, true);               soc->do_tag(--tag);
  88   CodeCache::oops_do(soc);                     soc->do_tag(--tag);
  89   soc->do_tag(666);
  90 }