hotspot/agent/src/share/classes/sun/jvm/hotspot/runtime/x86/X86RicochetFrame.java
changeset 10517 f92c9ff3a15f
equal deleted inserted replaced
10516:2797e487c09f 10517:f92c9ff3a15f
       
     1 /*
       
     2  * Copyright (c) 2011, 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 package sun.jvm.hotspot.runtime.x86;
       
    26 
       
    27 import java.util.*;
       
    28 import sun.jvm.hotspot.debugger.*;
       
    29 import sun.jvm.hotspot.runtime.*;
       
    30 import sun.jvm.hotspot.types.*;
       
    31 
       
    32 public class X86RicochetFrame extends VMObject {
       
    33   static {
       
    34     VM.registerVMInitializedObserver(new Observer() {
       
    35         public void update(Observable o, Object data) {
       
    36           initialize(VM.getVM().getTypeDataBase());
       
    37         }
       
    38       });
       
    39   }
       
    40 
       
    41   private static void initialize(TypeDataBase db) {
       
    42     Type type = db.lookupType("MethodHandles::RicochetFrame");
       
    43 
       
    44     senderLinkField    = type.getAddressField("_sender_link");
       
    45     savedArgsBaseField = type.getAddressField("_saved_args_base");
       
    46     exactSenderSPField = type.getAddressField("_exact_sender_sp");
       
    47     senderPCField      = type.getAddressField("_sender_pc");
       
    48   }
       
    49 
       
    50   private static AddressField senderLinkField;
       
    51   private static AddressField savedArgsBaseField;
       
    52   private static AddressField exactSenderSPField;
       
    53   private static AddressField senderPCField;
       
    54 
       
    55   static X86RicochetFrame fromFrame(X86Frame f) {
       
    56     return new X86RicochetFrame(f.getFP().addOffsetTo(- senderLinkField.getOffset()));
       
    57   }
       
    58 
       
    59   private X86RicochetFrame(Address addr) {
       
    60     super(addr);
       
    61   }
       
    62 
       
    63   public Address senderLink() {
       
    64     return senderLinkField.getValue(addr);
       
    65   }
       
    66   public Address senderLinkAddress() {
       
    67     return addr.addOffsetTo(senderLinkField.getOffset());
       
    68   }
       
    69   public Address savedArgsBase() {
       
    70     return savedArgsBaseField.getValue(addr);
       
    71   }
       
    72   public Address extendedSenderSP() {
       
    73     return savedArgsBase();
       
    74   }
       
    75   public Address exactSenderSP() {
       
    76     return exactSenderSPField.getValue(addr);
       
    77   }
       
    78   public Address senderPC() {
       
    79     return senderPCField.getValue(addr);
       
    80   }
       
    81 }