1 /*
   2  * Copyright (c) 2001, 2017, 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  *

  46     theTableField  = type.getAddressField("_the_table");
  47     sharedTableField = type.getAddressField("_shared_table");
  48     type = db.lookupType("RehashableSymbolHashtable");
  49     seedField = type.getCIntegerField("_seed");
  50   }
  51 
  52   // Fields
  53   private static AddressField theTableField;
  54   private static AddressField sharedTableField;
  55   private static CIntegerField seedField;
  56 
  57   private CompactHashTable sharedTable;
  58 
  59   // Accessors
  60   public static SymbolTable getTheTable() {
  61     Address tmp = theTableField.getValue();
  62     SymbolTable table = (SymbolTable) VMObjectFactory.newObject(SymbolTable.class, tmp);
  63     Address shared = sharedTableField.getStaticFieldAddress();
  64     table.sharedTable = (CompactHashTable)VMObjectFactory.newObject(CompactHashTable.class, shared);
  65     return table;




  66   }
  67 
  68   public static long getSeed() {
  69       return (long) seedField.getValue();
  70   }
  71 
  72   public static boolean useAlternateHashcode() {
  73       if (getSeed() != 0) {
  74           return true;
  75       }
  76       return false;
  77   }
  78 
  79   public SymbolTable(Address addr) {
  80     super(addr);
  81   }
  82 
  83   /** Clone of VM's "temporary" probe routine, as the SA currently
  84       does not support mutation so lookup() would have no effect
  85       anyway. Returns null if the given string is not in the symbol

   1 /*
   2  * Copyright (c) 2001, 2018, 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  *

  46     theTableField  = type.getAddressField("_the_table");
  47     sharedTableField = type.getAddressField("_shared_table");
  48     type = db.lookupType("RehashableSymbolHashtable");
  49     seedField = type.getCIntegerField("_seed");
  50   }
  51 
  52   // Fields
  53   private static AddressField theTableField;
  54   private static AddressField sharedTableField;
  55   private static CIntegerField seedField;
  56 
  57   private CompactHashTable sharedTable;
  58 
  59   // Accessors
  60   public static SymbolTable getTheTable() {
  61     Address tmp = theTableField.getValue();
  62     SymbolTable table = (SymbolTable) VMObjectFactory.newObject(SymbolTable.class, tmp);
  63     Address shared = sharedTableField.getStaticFieldAddress();
  64     table.sharedTable = (CompactHashTable)VMObjectFactory.newObject(CompactHashTable.class, shared);
  65     return table;
  66   }
  67 
  68   public CompactHashTable getSharedTable() {
  69       return sharedTable; 
  70   }
  71 
  72   public static long getSeed() {
  73       return (long) seedField.getValue();
  74   }
  75 
  76   public static boolean useAlternateHashcode() {
  77       if (getSeed() != 0) {
  78           return true;
  79       }
  80       return false;
  81   }
  82 
  83   public SymbolTable(Address addr) {
  84     super(addr);
  85   }
  86 
  87   /** Clone of VM's "temporary" probe routine, as the SA currently
  88       does not support mutation so lookup() would have no effect
  89       anyway. Returns null if the given string is not in the symbol