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1 /* |
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2 * Copyright (c) 2000, 2009, 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; |
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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), 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), 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(), false, false)); |
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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 } |