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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotForeignCallLinkage.java @ 9742:cff1e11941c0

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moved temporaries from CallingConvention to ForeignCallLinkage
author Doug Simon <doug.simon@oracle.com>
date Thu, 16 May 2013 18:05:30 +0200
parents c4b1aa93b9af
children 590e157cf4d4
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1 /*
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2 * Copyright (c) 2012, 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 package com.oracle.graal.hotspot;
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24
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25 import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*;
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26 import static com.oracle.graal.hotspot.HotSpotForeignCallLinkage.RegisterEffect.*;
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27
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28 import java.util.*;
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29
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30 import com.oracle.graal.api.code.*;
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31 import com.oracle.graal.api.code.CallingConvention.Type;
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32 import com.oracle.graal.api.meta.*;
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33 import com.oracle.graal.compiler.target.*;
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34 import com.oracle.graal.debug.*;
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35 import com.oracle.graal.hotspot.meta.*;
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36 import com.oracle.graal.hotspot.stubs.*;
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37 import com.oracle.graal.word.*;
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38
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39 /**
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40 * The details required to link a HotSpot runtime or stub call.
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41 */
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42 public class HotSpotForeignCallLinkage implements ForeignCallLinkage, InvokeTarget {
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43
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44 /**
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45 * Constants for specifying whether a foreign call destroys or preserves registers. A foreign
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46 * call will always destroy {@link HotSpotForeignCallLinkage#getCallingConvention() its}
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47 * {@linkplain ForeignCallLinkage#getTemporaries() temporary} registers.
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48 */
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49 public enum RegisterEffect {
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50 DESTROYS_REGISTERS, PRESERVES_REGISTERS
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51 }
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52
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53 /**
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54 * Constants for specifying whether a call is a leaf or not. A leaf function does not lock, GC
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55 * or throw exceptions. That is, the thread's execution state during the call is never inspected
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56 * by another thread.
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57 */
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58 public enum Transition {
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59 LEAF, NOT_LEAF;
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60 }
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61
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62 /**
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63 * Sentinel marker for a computed jump address.
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64 */
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65 public static final long JUMP_ADDRESS = 0xDEADDEADBEEFBEEFL;
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66
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67 /**
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68 * The descriptor of the call.
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69 */
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70 private final ForeignCallDescriptor descriptor;
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71
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72 /**
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73 * The entry point address of this call's target.
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74 */
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75 private long address;
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76
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77 /**
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78 * Non-null (eventually) iff this is a call to a compiled {@linkplain Stub stub}.
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79 */
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80 private Stub stub;
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81
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82 /**
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83 * The calling convention for this call.
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84 */
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85 private final CallingConvention cc;
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86
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87 private final RegisterEffect effect;
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88
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89 private final Transition transition;
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90
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91 /**
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92 * The locations defined/killed by the call.
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93 */
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94 private Value[] temporaries = AllocatableValue.NONE;
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95
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96 /**
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97 * Creates a {@link HotSpotForeignCallLinkage}.
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98 *
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99 * @param descriptor the descriptor of the call
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100 * @param address the address of the code to call
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101 * @param effect specifies if the call destroys or preserves all registers (apart from
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102 * temporaries which are always destroyed)
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103 * @param ccType calling convention type
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104 * @param transition specifies if this is a {@linkplain #isLeaf() leaf} call
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105 */
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106 public static HotSpotForeignCallLinkage create(ForeignCallDescriptor descriptor, long address, RegisterEffect effect, Type ccType, Transition transition) {
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107 CallingConvention targetCc = createCallingConvention(descriptor, ccType);
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108 return new HotSpotForeignCallLinkage(descriptor, address, effect, transition, targetCc);
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109 }
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110
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111 /**
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112 * Gets a calling convention for a given descriptor and call type.
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113 */
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114 public static CallingConvention createCallingConvention(ForeignCallDescriptor descriptor, Type ccType) {
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115 HotSpotRuntime runtime = graalRuntime().getRuntime();
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116 Class<?>[] argumentTypes = descriptor.getArgumentTypes();
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117 JavaType[] parameterTypes = new JavaType[argumentTypes.length];
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118 for (int i = 0; i < parameterTypes.length; ++i) {
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119 parameterTypes[i] = asJavaType(argumentTypes[i], runtime);
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120 }
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121 TargetDescription target = graalRuntime().getTarget();
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122 JavaType returnType = asJavaType(descriptor.getResultType(), runtime);
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123 return runtime.lookupRegisterConfig().getCallingConvention(ccType, returnType, parameterTypes, target, false);
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124 }
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125
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126 private static JavaType asJavaType(Class type, HotSpotRuntime runtime) {
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127 if (WordBase.class.isAssignableFrom(type)) {
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128 return runtime.lookupJavaType(wordKind().toJavaClass());
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129 } else {
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130 return runtime.lookupJavaType(type);
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131 }
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132 }
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133
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134 public HotSpotForeignCallLinkage(ForeignCallDescriptor descriptor, long address, RegisterEffect effect, Transition transition, CallingConvention cc) {
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135 this.address = address;
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136 this.effect = effect;
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137 this.transition = transition;
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138 this.descriptor = descriptor;
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139 this.cc = cc;
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140 }
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141
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142 @Override
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143 public String toString() {
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144 StringBuilder sb = new StringBuilder(stub == null ? descriptor.toString() : stub.toString());
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145 sb.append("@0x").append(Long.toHexString(address)).append(':').append(cc);
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146 if (temporaries != null && temporaries.length != 0) {
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147 sb.append("; temps=");
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148 String sep = "";
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149 for (Value op : temporaries) {
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150 sb.append(sep).append(op);
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151 sep = ",";
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152 }
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153 }
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154 return sb.toString();
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155 }
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156
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157 public CallingConvention getCallingConvention() {
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158 return cc;
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159 }
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160
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161 public Value[] getTemporaries() {
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162 if (temporaries.length == 0) {
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163 return temporaries;
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164 }
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165 return temporaries.clone();
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166 }
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167
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168 public long getMaxCallTargetOffset() {
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169 return graalRuntime().getCompilerToVM().getMaxCallTargetOffset(address);
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170 }
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171
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172 public ForeignCallDescriptor getDescriptor() {
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173 return descriptor;
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174 }
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175
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176 public void setCompiledStub(Stub stub) {
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177 assert address == 0L : "cannot set stub for linkage that already has an address: " + this;
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178 this.stub = stub;
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179 }
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180
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181 /**
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182 * Determines if this is a call to a compiled {@linkplain Stub stub}.
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183 */
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184 public boolean isCompiledStub() {
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185 return address == 0L || stub != null;
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186 }
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187
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188 public void finalizeAddress(Backend backend) {
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189 if (address == 0) {
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190 assert stub != null : "linkage without an address must be a stub - forgot to register a Stub associated with " + descriptor + "?";
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191 InstalledCode code = stub.getCode(backend);
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192
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193 Set<Register> destroyedRegisters = stub.getDestroyedRegisters();
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194 if (!destroyedRegisters.isEmpty()) {
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195 AllocatableValue[] temporaryLocations = new AllocatableValue[destroyedRegisters.size()];
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196 int i = 0;
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197 for (Register reg : destroyedRegisters) {
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198 temporaryLocations[i++] = reg.asValue();
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199 }
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200 temporaries = temporaryLocations;
9200
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201 }
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202 address = code.getStart();
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203 }
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204 }
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205
9452
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206 public long getAddress() {
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207 assert address != 0L : "address not yet finalized: " + this;
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208 return address;
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209 }
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210
8969
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diff changeset
211 @Override
9454
85a836bcd796 renaming for improved clarity: hasCall -> destroysCallerSavedRegisters
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diff changeset
212 public boolean destroysRegisters() {
9693
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213 return effect == DESTROYS_REGISTERS;
9352
d4684b468e93 made NewInstanceStub a RuntimeStub that directly calls the C runtime (GRAAL-81)
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214 }
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215
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216 /**
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217 * Determines if this is call to a function that does not lock, GC or throw exceptions. That is,
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218 * the thread's execution state during the call is never inspected by another thread.
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219 */
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220 public boolean isLeaf() {
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221 return transition == Transition.LEAF;
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222 }
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223 }