annotate src/share/vm/memory/oopFactory.hpp @ 20543:e7d0505c8a30

8059758: Footprint regressions with JDK-8038423 Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything. Reviewed-by: jwilhelm, brutisso
author tschatzl
date Fri, 10 Oct 2014 15:51:58 +0200
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1 /*
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_MEMORY_OOPFACTORY_HPP
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26 #define SHARE_VM_MEMORY_OOPFACTORY_HPP
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27
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28 #include "classfile/symbolTable.hpp"
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29 #include "classfile/systemDictionary.hpp"
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30 #include "memory/referenceType.hpp"
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31 #include "memory/universe.hpp"
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32 #include "oops/objArrayKlass.hpp"
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33 #include "oops/oop.hpp"
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34 #include "oops/typeArrayKlass.hpp"
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35 #include "utilities/growableArray.hpp"
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36
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37 // oopFactory is a class used for creating new objects.
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38
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39 class vframeArray;
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40
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41 class oopFactory: AllStatic {
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42 public:
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43 // Basic type leaf array allocation
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44 static typeArrayOop new_boolArray (int length, TRAPS) { return TypeArrayKlass::cast(Universe::boolArrayKlassObj ())->allocate(length, CHECK_NULL); }
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45 static typeArrayOop new_charArray (int length, TRAPS) { return TypeArrayKlass::cast(Universe::charArrayKlassObj ())->allocate(length, CHECK_NULL); }
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46 static typeArrayOop new_singleArray(int length, TRAPS) { return TypeArrayKlass::cast(Universe::singleArrayKlassObj())->allocate(length, CHECK_NULL); }
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47 static typeArrayOop new_doubleArray(int length, TRAPS) { return TypeArrayKlass::cast(Universe::doubleArrayKlassObj())->allocate(length, CHECK_NULL); }
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48 static typeArrayOop new_byteArray (int length, TRAPS) { return TypeArrayKlass::cast(Universe::byteArrayKlassObj ())->allocate(length, CHECK_NULL); }
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49 static typeArrayOop new_shortArray (int length, TRAPS) { return TypeArrayKlass::cast(Universe::shortArrayKlassObj ())->allocate(length, CHECK_NULL); }
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50 static typeArrayOop new_intArray (int length, TRAPS) { return TypeArrayKlass::cast(Universe::intArrayKlassObj ())->allocate(length, CHECK_NULL); }
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51 static typeArrayOop new_longArray (int length, TRAPS) { return TypeArrayKlass::cast(Universe::longArrayKlassObj ())->allocate(length, CHECK_NULL); }
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53 // create java.lang.Object[]
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54 static objArrayOop new_objectArray(int length, TRAPS) {
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55 assert(Universe::objectArrayKlassObj() != NULL, "Too early?");
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56 return ObjArrayKlass::
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57 cast(Universe::objectArrayKlassObj())->allocate(length, CHECK_NULL);
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58 }
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59
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60 static typeArrayOop new_charArray (const char* utf8_str, TRAPS);
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61 static typeArrayOop new_tenured_charArray(int length, TRAPS);
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63 static typeArrayOop new_typeArray(BasicType type, int length, TRAPS);
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64 static typeArrayOop new_typeArray_nozero(BasicType type, int length, TRAPS);
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65 static typeArrayOop new_metaDataArray(int length, TRAPS);
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67 // Regular object arrays
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68 static objArrayOop new_objArray(Klass* klass, int length, TRAPS);
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69 };
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71 #endif // SHARE_VM_MEMORY_OOPFACTORY_HPP