1 /* 2 * Copyright (c) 2005, 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.win32_amd64; 26 27 import java.io.*; 28 import java.util.*; 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.debugger.win32.*; 31 import sun.jvm.hotspot.debugger.amd64.*; 32 import sun.jvm.hotspot.runtime.*; 33 import sun.jvm.hotspot.runtime.amd64.*; 34 import sun.jvm.hotspot.runtime.x86.*; 35 import sun.jvm.hotspot.types.*; 36 import sun.jvm.hotspot.utilities.*; 37 38 /** This class is only public to allow using the VMObjectFactory to 39 instantiate these. 40 */ 41 42 public class Win32AMD64JavaThreadPDAccess implements JavaThreadPDAccess { 43 private static AddressField lastJavaFPField; 44 private static AddressField osThreadField; 45 46 // Field from OSThread 47 private static Field osThreadThreadHandleField; 48 49 // This is currently unneeded but is being kept in case we change 50 // the currentFrameGuess algorithm 51 private static final long GUESS_SCAN_RANGE = 128 * 1024; 52 53 static { 54 VM.registerVMInitializedObserver(new Observer() { 55 public void update(Observable o, Object data) { 56 initialize(VM.getVM().getTypeDataBase()); 57 } 58 }); 59 } 60 61 private static synchronized void initialize(TypeDataBase db) { 62 Type type = db.lookupType("JavaThread"); 63 Type anchorType = db.lookupType("JavaFrameAnchor"); 64 lastJavaFPField = anchorType.getAddressField("_last_Java_fp"); 65 osThreadField = type.getAddressField("_osthread"); 66 67 type = db.lookupType("OSThread"); 68 osThreadThreadHandleField = type.getField("_thread_handle"); 69 } 70 71 public Address getLastJavaFP(Address addr) { 72 return lastJavaFPField.getValue(addr.addOffsetTo(sun.jvm.hotspot.runtime.JavaThread.getAnchorField().getOffset())); 73 } 74 75 public Address getLastJavaPC(Address addr) { 76 return null; 77 } 78 79 public Address getBaseOfStackPointer(Address addr) { 80 return null; 81 } 82 83 public Frame getLastFramePD(JavaThread thread, Address addr) { 84 Address fp = thread.getLastJavaFP(); 85 if (fp == null) { 86 return null; // no information 87 } 88 Address pc = thread.getLastJavaPC(); 89 if ( pc != null ) { 90 return new X86Frame(thread.getLastJavaSP(), fp, pc); 91 } else { 92 return new X86Frame(thread.getLastJavaSP(), fp); 93 } 94 } 95 96 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) { 97 return new X86RegisterMap(thread, updateMap); 98 } 99 100 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) { 101 ThreadProxy t = getThreadProxy(addr); 102 AMD64ThreadContext context = (AMD64ThreadContext) t.getContext(); 103 AMD64CurrentFrameGuess guesser = new AMD64CurrentFrameGuess(context, thread); 104 if (!guesser.run(GUESS_SCAN_RANGE)) { 105 return null; 106 } 107 if (guesser.getPC() == null) { 108 return new X86Frame(guesser.getSP(), guesser.getFP()); 109 } else { 110 return new X86Frame(guesser.getSP(), guesser.getFP(), guesser.getPC()); 111 } 112 } 113 114 public void printThreadIDOn(Address addr, PrintStream tty) { 115 tty.print(getThreadProxy(addr)); 116 } 117 118 public void printInfoOn(Address threadAddr, PrintStream tty) { 119 } 120 121 public Address getLastSP(Address addr) { 122 ThreadProxy t = getThreadProxy(addr); 123 AMD64ThreadContext context = (AMD64ThreadContext) t.getContext(); 124 return context.getRegisterAsAddress(AMD64ThreadContext.RSP); 125 } 126 127 public ThreadProxy getThreadProxy(Address addr) { 128 // Addr is the address of the JavaThread. 129 // Fetch the OSThread (for now and for simplicity, not making a 130 // separate "OSThread" class in this package) 131 Address osThreadAddr = osThreadField.getValue(addr); 132 // Get the address of the HANDLE within the OSThread 133 Address threadHandleAddr = 134 osThreadAddr.addOffsetTo(osThreadThreadHandleField.getOffset()); 135 JVMDebugger debugger = VM.getVM().getDebugger(); 136 return debugger.getThreadForIdentifierAddress(threadHandleAddr); 137 } 138 }