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1 /*
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2 * Copyright 2000-2001 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;
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26
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27 import java.util.*;
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28 import sun.jvm.hotspot.debugger.*;
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29 import sun.jvm.hotspot.interpreter.*;
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30 import sun.jvm.hotspot.oops.*;
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31 import sun.jvm.hotspot.utilities.*;
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32
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33 public class InterpretedVFrame extends JavaVFrame {
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34 /** JVM state */
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35 public Method getMethod() {
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36 return getFrame().getInterpreterFrameMethod();
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37 }
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38
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39 public StackValueCollection getLocals() {
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40 Method m = getMethod();
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41
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42 int length = (int) m.getMaxLocals();
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43
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44 if (m.isNative()) {
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45 // If the method is native, getMaxLocals is not telling the truth.
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46 // maxlocals then equals the size of parameters
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47 length = (int) m.getSizeOfParameters();
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48 }
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49
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50 StackValueCollection result = new StackValueCollection(length);
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51
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52 // Get oopmap describing oops and int for current bci
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53 OopMapCacheEntry oopMask = getMethod().getMaskFor(getBCI());
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54
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55 // handle locals
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56 for(int i = 0; i < length; i++) {
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57 // Find stack location
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58 Address addr = addressOfLocalAt(i);
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59
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60 // Depending on oop/int put it in the right package
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61 StackValue sv;
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62 if (oopMask.isOop(i)) {
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63 // oop value
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64 sv = new StackValue(addr.getOopHandleAt(0));
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65 } else {
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66 // integer
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67 // Fetch a signed integer the size of a stack slot
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68 sv = new StackValue(addr.getCIntegerAt(0, VM.getVM().getAddressSize(), false));
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69 }
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70 result.add(sv);
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71 }
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72
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73 return result;
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74 }
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75
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76 public StackValueCollection getExpressions() {
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77 int length = getFrame().getInterpreterFrameExpressionStackSize();
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78
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79 if (getMethod().isNative()) {
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80 // If the method is native, there is no expression stack
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81 length = 0;
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82 }
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83
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84 int nofLocals = (int) getMethod().getMaxLocals();
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85 StackValueCollection result = new StackValueCollection(length);
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86
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87 // Get oopmap describing oops and int for current bci
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88 OopMapCacheEntry oopMask = getMethod().getMaskFor(getBCI());
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89
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90 for(int i = 0; i < length; i++) {
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91 // Find stack location
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92 Address addr = addressOfExpressionStackAt(i);
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93
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94 // Depending on oop/int put it in the right package
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95 StackValue sv;
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96 if (oopMask.isOop(i + nofLocals)) {
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97 // oop value
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98 sv = new StackValue(addr.getOopHandleAt(0));
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99 } else {
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100 // integer
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101 // Fetch a signed integer the size of a stack slot
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102 sv = new StackValue(addr.getCIntegerAt(0, VM.getVM().getAddressSize(), false));
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103 }
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104 result.add(sv);
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105 }
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106
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107 return result;
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108 }
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109
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110 /** Returns List<MonitorInfo> */
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111 public List getMonitors() {
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112 List result = new ArrayList(5);
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113 for (BasicObjectLock current = getFrame().interpreterFrameMonitorEnd();
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114 current.address().lessThan(getFrame().interpreterFrameMonitorBegin().address());
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115 current = getFrame().nextMonitorInInterpreterFrame(current)) {
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116 result.add(new MonitorInfo(current.obj(), current.lock()));
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117 }
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118 return result;
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119 }
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120
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121 /** Test operation */
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122 public boolean isInterpretedFrame() { return true; }
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123
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124 /** Package-internal constructor */
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125 InterpretedVFrame(Frame fr, RegisterMap regMap, JavaThread thread) {
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126 super(fr, regMap, thread);
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127 }
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128
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129 /** Accessor for Byte Code Index (NOTE: access to BCP is not allowed
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130 in this system; see Frame.java) */
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131 public int getBCI() {
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132 return getFrame().getInterpreterFrameBCI();
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133 }
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134
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135 /** Setter for Byte Code Index */
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136 // FIXME: not yet implementable
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137 // public void setBCI(int bci) {
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138 // getFrame().setInterpreterFrameBCI(bci);
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139 // }
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140
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141 public void verify() {
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142 }
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143
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144 //--------------------------------------------------------------------------------
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145 // Internals only below this point
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146 //
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147
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148 private Address addressOfLocalAt(int index) {
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149 if (Assert.ASSERTS_ENABLED) {
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150 Assert.that(getFrame().isInterpretedFrame(), "frame should be an interpreted frame");
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151 }
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152 return fr.addressOfInterpreterFrameLocal(index);
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153 }
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154
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155 private Address addressOfExpressionStackAt(int index) {
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156 return fr.addressOfInterpreterFrameExpressionStackSlot(index);
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157 }
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158 }
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