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 }