0
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1 /*
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2 * Copyright 2001-2006 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.x86;
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26
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27 import java.util.*;
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28 import sun.jvm.hotspot.asm.x86.*;
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29 import sun.jvm.hotspot.code.*;
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30 import sun.jvm.hotspot.compiler.*;
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31 import sun.jvm.hotspot.debugger.*;
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32 import sun.jvm.hotspot.oops.*;
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33 import sun.jvm.hotspot.runtime.*;
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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 /** Specialization of and implementation of abstract methods of the
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38 Frame class for the x86 family of CPUs. */
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39
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40 public class X86Frame extends Frame {
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41 private static final boolean DEBUG;
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42 static {
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43 DEBUG = System.getProperty("sun.jvm.hotspot.runtime.x86.X86Frame.DEBUG") != null;
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44 }
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45
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46 // All frames
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47 private static final int LINK_OFFSET = 0;
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48 private static final int RETURN_ADDR_OFFSET = 1;
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49 private static final int SENDER_SP_OFFSET = 2;
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50
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51 // Interpreter frames
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52 private static final int INTERPRETER_FRAME_MIRROR_OFFSET = 2; // for native calls only
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53 private static final int INTERPRETER_FRAME_SENDER_SP_OFFSET = -1;
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54 private static final int INTERPRETER_FRAME_LAST_SP_OFFSET = INTERPRETER_FRAME_SENDER_SP_OFFSET - 1;
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55 private static final int INTERPRETER_FRAME_METHOD_OFFSET = INTERPRETER_FRAME_LAST_SP_OFFSET - 1;
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56 private static int INTERPRETER_FRAME_MDX_OFFSET; // Non-core builds only
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57 private static int INTERPRETER_FRAME_CACHE_OFFSET;
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58 private static int INTERPRETER_FRAME_LOCALS_OFFSET;
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59 private static int INTERPRETER_FRAME_BCX_OFFSET;
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60 private static int INTERPRETER_FRAME_INITIAL_SP_OFFSET;
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61 private static int INTERPRETER_FRAME_MONITOR_BLOCK_TOP_OFFSET;
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62 private static int INTERPRETER_FRAME_MONITOR_BLOCK_BOTTOM_OFFSET;
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63
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64 // Entry frames
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65 private static final int ENTRY_FRAME_CALL_WRAPPER_OFFSET = 2;
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66
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67 // Native frames
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68 private static final int NATIVE_FRAME_INITIAL_PARAM_OFFSET = 2;
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69
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70 static {
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71 VM.registerVMInitializedObserver(new Observer() {
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72 public void update(Observable o, Object data) {
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73 initialize(VM.getVM().getTypeDataBase());
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74 }
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75 });
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76 }
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77
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78 private static synchronized void initialize(TypeDataBase db) {
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79 if (VM.getVM().isCore()) {
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80 INTERPRETER_FRAME_CACHE_OFFSET = INTERPRETER_FRAME_METHOD_OFFSET - 1;
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81 } else {
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82 INTERPRETER_FRAME_MDX_OFFSET = INTERPRETER_FRAME_METHOD_OFFSET - 1;
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83 INTERPRETER_FRAME_CACHE_OFFSET = INTERPRETER_FRAME_MDX_OFFSET - 1;
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84 }
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85 INTERPRETER_FRAME_LOCALS_OFFSET = INTERPRETER_FRAME_CACHE_OFFSET - 1;
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86 INTERPRETER_FRAME_BCX_OFFSET = INTERPRETER_FRAME_LOCALS_OFFSET - 1;
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87 INTERPRETER_FRAME_INITIAL_SP_OFFSET = INTERPRETER_FRAME_BCX_OFFSET - 1;
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88 INTERPRETER_FRAME_MONITOR_BLOCK_TOP_OFFSET = INTERPRETER_FRAME_INITIAL_SP_OFFSET;
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89 INTERPRETER_FRAME_MONITOR_BLOCK_BOTTOM_OFFSET = INTERPRETER_FRAME_INITIAL_SP_OFFSET;
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90 }
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91
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92 // an additional field beyond sp and pc:
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93 Address raw_fp; // frame pointer
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94 private Address raw_unextendedSP;
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95
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96 private X86Frame() {
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97 }
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98
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99 private void adjustForDeopt() {
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100 if ( pc != null) {
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101 // Look for a deopt pc and if it is deopted convert to original pc
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102 CodeBlob cb = VM.getVM().getCodeCache().findBlob(pc);
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103 if (cb != null && cb.isJavaMethod()) {
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104 NMethod nm = (NMethod) cb;
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105 if (pc.equals(nm.deoptBegin())) {
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106 if (Assert.ASSERTS_ENABLED) {
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107 Assert.that(this.getUnextendedSP() != null, "null SP in Java frame");
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108 }
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109 // adjust pc if frame is deoptimized.
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110 pc = this.getUnextendedSP().getAddressAt(nm.origPCOffset());
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111 deoptimized = true;
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112 }
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113 }
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114 }
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115 }
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116
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117 public X86Frame(Address raw_sp, Address raw_fp, Address pc) {
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118 this.raw_sp = raw_sp;
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119 this.raw_unextendedSP = raw_sp;
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120 this.raw_fp = raw_fp;
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121 this.pc = pc;
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122
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123 // Frame must be fully constructed before this call
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124 adjustForDeopt();
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125
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126 if (DEBUG) {
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127 System.out.println("X86Frame(sp, fp, pc): " + this);
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128 dumpStack();
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129 }
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130 }
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131
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132 public X86Frame(Address raw_sp, Address raw_fp) {
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133 this.raw_sp = raw_sp;
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134 this.raw_unextendedSP = raw_sp;
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135 this.raw_fp = raw_fp;
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136 this.pc = raw_sp.getAddressAt(-1 * VM.getVM().getAddressSize());
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137
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138 // Frame must be fully constructed before this call
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139 adjustForDeopt();
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140
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141 if (DEBUG) {
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142 System.out.println("X86Frame(sp, fp): " + this);
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143 dumpStack();
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144 }
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145 }
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146
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147 // This constructor should really take the unextended SP as an arg
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148 // but then the constructor is ambiguous with constructor that takes
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149 // a PC so take an int and convert it.
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150 public X86Frame(Address raw_sp, Address raw_fp, long extension) {
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151 this.raw_sp = raw_sp;
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152 if (raw_sp == null) {
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153 this.raw_unextendedSP = null;
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154 } else {
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155 this.raw_unextendedSP = raw_sp.addOffsetTo(extension);
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156 }
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157 this.raw_fp = raw_fp;
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158 this.pc = raw_sp.getAddressAt(-1 * VM.getVM().getAddressSize());
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159
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160 // Frame must be fully constructed before this call
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161 adjustForDeopt();
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162
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163 if (DEBUG) {
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164 System.out.println("X86Frame(sp, fp): " + this);
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165 dumpStack();
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166 }
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167
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168 }
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169
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170 public Object clone() {
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171 X86Frame frame = new X86Frame();
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172 frame.raw_sp = raw_sp;
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173 frame.raw_unextendedSP = raw_unextendedSP;
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174 frame.raw_fp = raw_fp;
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175 frame.raw_fp = raw_fp;
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176 frame.pc = pc;
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177 frame.deoptimized = deoptimized;
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178 return frame;
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179 }
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180
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181 public boolean equals(Object arg) {
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182 if (arg == null) {
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183 return false;
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184 }
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185
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186 if (!(arg instanceof X86Frame)) {
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187 return false;
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188 }
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189
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190 X86Frame other = (X86Frame) arg;
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191
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192 return (AddressOps.equal(getSP(), other.getSP()) &&
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193 AddressOps.equal(getUnextendedSP(), other.getUnextendedSP()) &&
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194 AddressOps.equal(getFP(), other.getFP()) &&
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195 AddressOps.equal(getPC(), other.getPC()));
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196 }
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197
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198 public int hashCode() {
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199 if (raw_sp == null) {
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200 return 0;
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201 }
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202
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203 return raw_sp.hashCode();
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204 }
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205
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206 public String toString() {
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207 return "sp: " + (getSP() == null? "null" : getSP().toString()) +
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208 ", unextendedSP: " + (getUnextendedSP() == null? "null" : getUnextendedSP().toString()) +
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209 ", fp: " + (getFP() == null? "null" : getFP().toString()) +
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210 ", pc: " + (pc == null? "null" : pc.toString());
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211 }
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212
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213 // accessors for the instance variables
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214 public Address getFP() { return raw_fp; }
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215 public Address getSP() { return raw_sp; }
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216 public Address getID() { return raw_sp; }
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217
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218 // FIXME: not implemented yet (should be done for Solaris/X86)
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219 public boolean isSignalHandlerFrameDbg() { return false; }
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220 public int getSignalNumberDbg() { return 0; }
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221 public String getSignalNameDbg() { return null; }
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222
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223 public boolean isInterpretedFrameValid() {
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224 if (Assert.ASSERTS_ENABLED) {
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225 Assert.that(isInterpretedFrame(), "Not an interpreted frame");
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226 }
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227
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228 // These are reasonable sanity checks
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229 if (getFP() == null || getFP().andWithMask(0x3) != null) {
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230 return false;
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231 }
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232
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233 if (getSP() == null || getSP().andWithMask(0x3) != null) {
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234 return false;
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235 }
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236
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237 if (getFP().addOffsetTo(INTERPRETER_FRAME_INITIAL_SP_OFFSET * VM.getVM().getAddressSize()).lessThan(getSP())) {
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238 return false;
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239 }
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240
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241 // These are hacks to keep us out of trouble.
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242 // The problem with these is that they mask other problems
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243 if (getFP().lessThanOrEqual(getSP())) {
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244 // this attempts to deal with unsigned comparison above
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245 return false;
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246 }
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247
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248 if (getFP().minus(getSP()) > 4096 * VM.getVM().getAddressSize()) {
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249 // stack frames shouldn't be large.
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250 return false;
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251 }
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252
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253 return true;
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254 }
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255
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256 // FIXME: not applicable in current system
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257 // void patch_pc(Thread* thread, address pc);
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258
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259 public Frame sender(RegisterMap regMap, CodeBlob cb) {
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260 X86RegisterMap map = (X86RegisterMap) regMap;
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261
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262 if (Assert.ASSERTS_ENABLED) {
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263 Assert.that(map != null, "map must be set");
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264 }
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265
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266 // Default is we done have to follow them. The sender_for_xxx will
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267 // update it accordingly
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268 map.setIncludeArgumentOops(false);
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269
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270 if (isEntryFrame()) return senderForEntryFrame(map);
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271 if (isInterpretedFrame()) return senderForInterpreterFrame(map);
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272
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273 if (!VM.getVM().isCore()) {
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274 if(cb == null) {
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275 cb = VM.getVM().getCodeCache().findBlob(getPC());
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276 } else {
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277 if (Assert.ASSERTS_ENABLED) {
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278 Assert.that(cb.equals(VM.getVM().getCodeCache().findBlob(getPC())), "Must be the same");
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279 }
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280 }
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281
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282 if (cb != null) {
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283 return senderForCompiledFrame(map, cb);
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284 }
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285 }
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286
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287 // Must be native-compiled frame, i.e. the marshaling code for native
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288 // methods that exists in the core system.
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289 return new X86Frame(getSenderSP(), getLink(), getSenderPC());
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290 }
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291
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292 private Frame senderForEntryFrame(X86RegisterMap map) {
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293 if (Assert.ASSERTS_ENABLED) {
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294 Assert.that(map != null, "map must be set");
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295 }
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296 // Java frame called from C; skip all C frames and return top C
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297 // frame of that chunk as the sender
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298 X86JavaCallWrapper jcw = (X86JavaCallWrapper) getEntryFrameCallWrapper();
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299 if (Assert.ASSERTS_ENABLED) {
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300 Assert.that(!entryFrameIsFirst(), "next Java fp must be non zero");
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301 Assert.that(jcw.getLastJavaSP().greaterThan(getSP()), "must be above this frame on stack");
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302 }
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303 X86Frame fr;
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304 if (jcw.getLastJavaPC() != null) {
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305 fr = new X86Frame(jcw.getLastJavaSP(), jcw.getLastJavaFP(), jcw.getLastJavaPC());
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306 } else {
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307 fr = new X86Frame(jcw.getLastJavaSP(), jcw.getLastJavaFP());
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308 }
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309 map.clear();
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310 if (Assert.ASSERTS_ENABLED) {
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311 Assert.that(map.getIncludeArgumentOops(), "should be set by clear");
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312 }
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313 return fr;
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314 }
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315
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316 private Frame senderForInterpreterFrame(X86RegisterMap map) {
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317 Address unextendedSP = addressOfStackSlot(INTERPRETER_FRAME_SENDER_SP_OFFSET).getAddressAt(0);
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318 Address sp = addressOfStackSlot(SENDER_SP_OFFSET);
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319 // We do not need to update the callee-save register mapping because above
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320 // us is either another interpreter frame or a converter-frame, but never
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321 // directly a compiled frame.
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322 // 11/24/04 SFG. With the removal of adapter frames this is no longer true.
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323 // However c2 no longer uses callee save register for java calls so there
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324 // are no callee register to find.
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325
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326 return new X86Frame(sp, getLink(), unextendedSP.minus(sp));
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327 }
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328
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329 private Frame senderForCompiledFrame(X86RegisterMap map, CodeBlob cb) {
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330 //
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331 // NOTE: some of this code is (unfortunately) duplicated in X86CurrentFrameGuess
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332 //
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333
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334 if (Assert.ASSERTS_ENABLED) {
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335 Assert.that(map != null, "map must be set");
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336 }
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337
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338 // frame owned by optimizing compiler
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339 Address sender_sp = null;
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340
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341 if (VM.getVM().isClientCompiler()) {
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342 sender_sp = addressOfStackSlot(SENDER_SP_OFFSET);
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343 } else {
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344 if (Assert.ASSERTS_ENABLED) {
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345 Assert.that(cb.getFrameSize() >= 0, "Compiled by Compiler1: do not use");
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346 }
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347 sender_sp = getUnextendedSP().addOffsetTo(cb.getFrameSize());
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348 }
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349
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350 // On Intel the return_address is always the word on the stack
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351 Address sender_pc = sender_sp.getAddressAt(-1 * VM.getVM().getAddressSize());
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352
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353 if (map.getUpdateMap() && cb.getOopMaps() != null) {
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354 OopMapSet.updateRegisterMap(this, cb, map, true);
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355 }
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356
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357 if (VM.getVM().isClientCompiler()) {
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358 // Move this here for C1 and collecting oops in arguments (According to Rene)
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359 map.setIncludeArgumentOops(cb.callerMustGCArguments(map.getThread()));
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360 }
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361
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362 Address saved_fp = null;
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363 if (VM.getVM().isClientCompiler()) {
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364 saved_fp = getFP().getAddressAt(0);
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365 } else if (VM.getVM().isServerCompiler() &&
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366 (VM.getVM().getInterpreter().contains(sender_pc) ||
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367 VM.getVM().getStubRoutines().returnsToCallStub(sender_pc))) {
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368 // C2 prologue saves EBP in the usual place.
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369 // however only use it if the sender had link infomration in it.
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370 saved_fp = sender_sp.getAddressAt(-2 * VM.getVM().getAddressSize());
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371 }
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372
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373 return new X86Frame(sender_sp, saved_fp, sender_pc);
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374 }
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375
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376 protected boolean hasSenderPD() {
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377 // FIXME
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378 // Check for null ebp? Need to do some tests.
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379 return true;
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380 }
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381
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382 public long frameSize() {
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383 return (getSenderSP().minus(getSP()) / VM.getVM().getAddressSize());
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384 }
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385
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386 public Address getLink() {
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387 return addressOfStackSlot(LINK_OFFSET).getAddressAt(0);
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388 }
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389
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390 // FIXME: not implementable yet
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391 //inline void frame::set_link(intptr_t* addr) { *(intptr_t **)addr_at(link_offset) = addr; }
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392
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393 public Address getUnextendedSP() { return raw_unextendedSP; }
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394
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395 // Return address:
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396 public Address getSenderPCAddr() { return addressOfStackSlot(RETURN_ADDR_OFFSET); }
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397 public Address getSenderPC() { return getSenderPCAddr().getAddressAt(0); }
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398
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399 // return address of param, zero origin index.
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400 public Address getNativeParamAddr(int idx) {
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401 return addressOfStackSlot(NATIVE_FRAME_INITIAL_PARAM_OFFSET + idx);
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402 }
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403
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404 public Address getSenderSP() { return addressOfStackSlot(SENDER_SP_OFFSET); }
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405
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406 public Address compiledArgumentToLocationPD(VMReg reg, RegisterMap regMap, int argSize) {
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407 if (VM.getVM().isCore() || VM.getVM().isClientCompiler()) {
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408 throw new RuntimeException("Should not reach here");
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409 }
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410
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411 return oopMapRegToLocation(reg, regMap);
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412 }
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413
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414 public Address addressOfInterpreterFrameLocals() {
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415 return addressOfStackSlot(INTERPRETER_FRAME_LOCALS_OFFSET);
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416 }
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417
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418 private Address addressOfInterpreterFrameBCX() {
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419 return addressOfStackSlot(INTERPRETER_FRAME_BCX_OFFSET);
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420 }
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421
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422 public int getInterpreterFrameBCI() {
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423 // FIXME: this is not atomic with respect to GC and is unsuitable
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424 // for use in a non-debugging, or reflective, system. Need to
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425 // figure out how to express this.
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426 Address bcp = addressOfInterpreterFrameBCX().getAddressAt(0);
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427 OopHandle methodHandle = addressOfInterpreterFrameMethod().getOopHandleAt(0);
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428 Method method = (Method) VM.getVM().getObjectHeap().newOop(methodHandle);
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429 return bcpToBci(bcp, method);
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430 }
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431
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432 public Address addressOfInterpreterFrameMDX() {
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433 return addressOfStackSlot(INTERPRETER_FRAME_MDX_OFFSET);
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434 }
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435
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436 // FIXME
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437 //inline int frame::interpreter_frame_monitor_size() {
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438 // return BasicObjectLock::size();
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439 //}
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440
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441 // expression stack
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442 // (the max_stack arguments are used by the GC; see class FrameClosure)
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443
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444 public Address addressOfInterpreterFrameExpressionStack() {
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445 Address monitorEnd = interpreterFrameMonitorEnd().address();
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446 return monitorEnd.addOffsetTo(-1 * VM.getVM().getAddressSize());
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447 }
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448
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449 public int getInterpreterFrameExpressionStackDirection() { return -1; }
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450
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451 // top of expression stack
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452 public Address addressOfInterpreterFrameTOS() {
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453 return getSP();
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454 }
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455
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456 /** Expression stack from top down */
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457 public Address addressOfInterpreterFrameTOSAt(int slot) {
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458 return addressOfInterpreterFrameTOS().addOffsetTo(slot * VM.getVM().getAddressSize());
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459 }
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460
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461 public Address getInterpreterFrameSenderSP() {
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462 if (Assert.ASSERTS_ENABLED) {
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463 Assert.that(isInterpretedFrame(), "interpreted frame expected");
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464 }
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465 return addressOfStackSlot(INTERPRETER_FRAME_SENDER_SP_OFFSET).getAddressAt(0);
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466 }
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467
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468 // Monitors
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469 public BasicObjectLock interpreterFrameMonitorBegin() {
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470 return new BasicObjectLock(addressOfStackSlot(INTERPRETER_FRAME_MONITOR_BLOCK_BOTTOM_OFFSET));
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471 }
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472
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473 public BasicObjectLock interpreterFrameMonitorEnd() {
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474 Address result = addressOfStackSlot(INTERPRETER_FRAME_MONITOR_BLOCK_TOP_OFFSET).getAddressAt(0);
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475 if (Assert.ASSERTS_ENABLED) {
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476 // make sure the pointer points inside the frame
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477 Assert.that(AddressOps.gt(getFP(), result), "result must < than frame pointer");
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478 Assert.that(AddressOps.lte(getSP(), result), "result must >= than stack pointer");
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479 }
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480 return new BasicObjectLock(result);
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481 }
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482
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483 public int interpreterFrameMonitorSize() {
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484 return BasicObjectLock.size();
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485 }
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486
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487 // Method
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488 public Address addressOfInterpreterFrameMethod() {
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489 return addressOfStackSlot(INTERPRETER_FRAME_METHOD_OFFSET);
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490 }
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491
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492 // Constant pool cache
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493 public Address addressOfInterpreterFrameCPCache() {
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494 return addressOfStackSlot(INTERPRETER_FRAME_CACHE_OFFSET);
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495 }
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496
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497 // Entry frames
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498 public JavaCallWrapper getEntryFrameCallWrapper() {
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499 return new X86JavaCallWrapper(addressOfStackSlot(ENTRY_FRAME_CALL_WRAPPER_OFFSET).getAddressAt(0));
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500 }
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501
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502 protected Address addressOfSavedOopResult() {
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503 // offset is 2 for compiler2 and 3 for compiler1
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504 return getSP().addOffsetTo((VM.getVM().isClientCompiler() ? 2 : 3) *
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505 VM.getVM().getAddressSize());
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506 }
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507
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508 protected Address addressOfSavedReceiver() {
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509 return getSP().addOffsetTo(-4 * VM.getVM().getAddressSize());
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510 }
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511
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512 private void dumpStack() {
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513 if (getFP() != null) {
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514 for (Address addr = getSP().addOffsetTo(-5 * VM.getVM().getAddressSize());
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515 AddressOps.lte(addr, getFP().addOffsetTo(5 * VM.getVM().getAddressSize()));
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516 addr = addr.addOffsetTo(VM.getVM().getAddressSize())) {
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517 System.out.println(addr + ": " + addr.getAddressAt(0));
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518 }
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519 } else {
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520 for (Address addr = getSP().addOffsetTo(-5 * VM.getVM().getAddressSize());
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521 AddressOps.lte(addr, getSP().addOffsetTo(20 * VM.getVM().getAddressSize()));
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522 addr = addr.addOffsetTo(VM.getVM().getAddressSize())) {
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523 System.out.println(addr + ": " + addr.getAddressAt(0));
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524 }
|
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525 }
|
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526 }
|
|
527 }
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