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1 /*
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2 * Copyright 2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any 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.linux_ia64;
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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.ia64.*;
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31 import sun.jvm.hotspot.runtime.*;
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32 import sun.jvm.hotspot.runtime.ia64.*;
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33 import sun.jvm.hotspot.types.*;
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34 import sun.jvm.hotspot.utilities.*;
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35
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36 public class LinuxIA64JavaThreadPDAccess implements JavaThreadPDAccess {
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37 // private static AddressField lastJavaPCField;
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38 // private static AddressField lastJavaFPField;
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39 private static AddressField lastJavaIFrameField;
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40 private static AddressField osThreadField;
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41
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42 // Field from OSThread
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43 private static CIntegerField osThreadPThreadIDField;
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44
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45 // This is currently unneeded but is being kept in case we change
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46 // the currentFrameGuess algorithm
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47 private static final long GUESS_SCAN_RANGE = 128 * 1024;
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48
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49 static {
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50 VM.registerVMInitializedObserver(new Observer() {
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51 public void update(Observable o, Object data) {
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52 initialize(VM.getVM().getTypeDataBase());
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53 }
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54 });
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55 }
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56
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57 private static synchronized void initialize(TypeDataBase db) {
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58 Type type = db.lookupType("JavaThread");
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59
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60 lastJavaIFrameField = type.getAddressField("_last_Java_iframe");
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61 osThreadField = type.getAddressField("_osthread");
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62
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63 type = db.lookupType("OSThread");
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64 osThreadPThreadIDField = type.getCIntegerField("_pthread_id");
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65 }
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66
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67 public Address getLastJavaIFrame(Address addr) {
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68 return lastJavaIFrameField.getValue(addr);
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69 }
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70
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71
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72 public Address getBaseOfStackPointer(Address addr) {
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73 return null;
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74 }
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75
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76 public Address getLastJavaFP(Address addr) {
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77 return null; // Not in 1.4.1
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78 }
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79
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80 public Address getLastJavaPC(Address addr) {
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81 return null; // Not in 1.4.1
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82 }
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83
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84 public boolean isInterpretedFrame() {
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85
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86 // In 1.4.1 there are only interpreted frames
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87 // and there is no pc
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88 return true;
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89 }
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90
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91 public Frame getLastFramePD(JavaThread thread, Address addr) {
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92 // The thread is the JavaThread that contains "this"
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93 // so we don't need any new accessor at the JavaThread level
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94 Address iframe = getLastJavaIFrame(addr);
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95 Address pc = thread.getLastJavaPC();
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96 if (iframe == null) {
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97 return null; // no information
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98 }
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99 return new IA64Frame(thread.getLastJavaSP(), iframe, pc);
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100 }
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101
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102 public RegisterMap newRegisterMap(JavaThread thread, boolean updateMap) {
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103 return new IA64RegisterMap(thread, updateMap);
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104 }
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105
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106 public Frame getCurrentFrameGuess(JavaThread thread, Address addr) {
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107 return getLastFramePD(thread, addr);
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108 }
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109
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110 public void printThreadIDOn(Address addr, PrintStream tty) {
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111 tty.print(getThreadProxy(addr));
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112 }
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113
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114 public void printInfoOn(Address threadAddr, PrintStream tty) {
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115 tty.print("Thread id: ");
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116 printThreadIDOn(threadAddr, tty);
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117 tty.println("\nLastJavaIFrame: " + getLastJavaIFrame(threadAddr));
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118 }
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119
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120 public Address getLastSP(Address addr) {
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121 ThreadProxy t = getThreadProxy(addr);
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122 IA64ThreadContext context = (IA64ThreadContext) t.getContext();
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123 return context.getRegisterAsAddress(IA64ThreadContext.SP);
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124 }
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125
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126 public ThreadProxy getThreadProxy(Address addr) {
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127 // Addr is the address of the JavaThread.
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128 // Fetch the OSThread (for now and for simplicity, not making a
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129 // separate "OSThread" class in this package)
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130 Address osThreadAddr = osThreadField.getValue(addr);
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131 // Get the address of the _pthread_id from the OSThread
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132 Address pthreadIdAddr = osThreadAddr.addOffsetTo(osThreadPThreadIDField.getOffset());
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133
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134 JVMDebugger debugger = VM.getVM().getDebugger();
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135 return debugger.getThreadForIdentifierAddress(pthreadIdAddr);
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136 }
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137 }
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