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3960
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1 /*
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2 * Copyright (c) 2003, 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 package sun.jvm.hotspot.runtime.bsd_amd64;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.debugger.amd64.*;
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31 import sun.jvm.hotspot.runtime.*;
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32 import sun.jvm.hotspot.runtime.amd64.*;
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33 import sun.jvm.hotspot.runtime.x86.*;
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34 import sun.jvm.hotspot.types.*;
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35 import sun.jvm.hotspot.utilities.*;
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36
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37 public class BsdAMD64JavaThreadPDAccess implements JavaThreadPDAccess {
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38 private static AddressField lastJavaFPField;
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39 private static AddressField osThreadField;
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40
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41 // Field from OSThread
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42 private static CIntegerField osThreadThreadIDField;
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43
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44 // This is currently unneeded but is being kept in case we change
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45 // the currentFrameGuess algorithm
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46 private static final long GUESS_SCAN_RANGE = 128 * 1024;
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47
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48 static {
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49 VM.registerVMInitializedObserver(new Observer() {
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50 public void update(Observable o, Object data) {
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51 initialize(VM.getVM().getTypeDataBase());
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52 }
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53 });
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54 }
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55
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56 private static synchronized void initialize(TypeDataBase db) {
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57 Type type = db.lookupType("JavaThread");
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58 osThreadField = type.getAddressField("_osthread");
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59
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60 Type anchorType = db.lookupType("JavaFrameAnchor");
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61 lastJavaFPField = anchorType.getAddressField("_last_Java_fp");
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62
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63 Type osThreadType = db.lookupType("OSThread");
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64 osThreadThreadIDField = osThreadType.getCIntegerField("_thread_id");
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65 }
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66
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67 public Address getLastJavaFP(Address addr) {
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68 return lastJavaFPField.getValue(addr.addOffsetTo(sun.jvm.hotspot.runtime.JavaThread.getAnchorField().getOffset()));
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69 }
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70
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71 public Address getLastJavaPC(Address addr) {
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72 return null;
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73 }
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74
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75 public Address getBaseOfStackPointer(Address addr) {
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76 return null;
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77 }
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78
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79 public Frame getLastFramePD(JavaThread thread, Address addr) {
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80 Address fp = thread.getLastJavaFP();
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81 if (fp == null) {
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82 return null; // no information
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83 }
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84 return new X86Frame(thread.getLastJavaSP(), fp);
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85 }
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86
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87 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) {
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88 return new X86RegisterMap(thread, updateMap);
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89 }
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90
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91 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) {
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92 ThreadProxy t = getThreadProxy(addr);
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93 AMD64ThreadContext context = (AMD64ThreadContext) t.getContext();
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94 AMD64CurrentFrameGuess guesser = new AMD64CurrentFrameGuess(context, thread);
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95 if (!guesser.run(GUESS_SCAN_RANGE)) {
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96 return null;
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97 }
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98 if (guesser.getPC() == null) {
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99 return new X86Frame(guesser.getSP(), guesser.getFP());
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100 } else {
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101 return new X86Frame(guesser.getSP(), guesser.getFP(), guesser.getPC());
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102 }
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103 }
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104
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105 public void printThreadIDOn(Address addr, PrintStream tty) {
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106 tty.print(getThreadProxy(addr));
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107 }
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108
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109 public void printInfoOn(Address threadAddr, PrintStream tty) {
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110 tty.print("Thread id: ");
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111 printThreadIDOn(threadAddr, tty);
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112 // tty.println("\nPostJavaState: " + getPostJavaState(threadAddr));
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113 }
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114
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115 public Address getLastSP(Address addr) {
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116 ThreadProxy t = getThreadProxy(addr);
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117 AMD64ThreadContext context = (AMD64ThreadContext) t.getContext();
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118 return context.getRegisterAsAddress(AMD64ThreadContext.RSP);
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119 }
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120
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121 public ThreadProxy getThreadProxy(Address addr) {
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122 // Addr is the address of the JavaThread.
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123 // Fetch the OSThread (for now and for simplicity, not making a
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124 // separate "OSThread" class in this package)
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125 Address osThreadAddr = osThreadField.getValue(addr);
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126 // Get the address of the _thread_id from the OSThread
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127 Address threadIdAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset());
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128
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129 JVMDebugger debugger = VM.getVM().getDebugger();
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130 return debugger.getThreadForIdentifierAddress(threadIdAddr);
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131 }
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132 }
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