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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotRuntimeCallTarget.java @ 9735:2e4f035186cf

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rename: Descriptor -> ForeignCallDescriptor
author Doug Simon <doug.simon@oracle.com>
date Thu, 16 May 2013 16:01:40 +0200
parents f7bd4594cbbf
children 4cd4926ec683
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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.HotSpotRuntimeCallTarget.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.hotspot.meta.*;
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35 import com.oracle.graal.hotspot.stubs.*;
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36 import com.oracle.graal.word.*;
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37
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38 /**
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39 * The details required to link a HotSpot runtime or stub call.
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40 */
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41 public class HotSpotRuntimeCallTarget implements RuntimeCallTarget, InvokeTarget {
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42
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43 /**
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44 * Constants for specifying whether a call destroys or preserves registers. A call will always
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45 * destroy {@link HotSpotRuntimeCallTarget#getCallingConvention() its}
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46 * {@linkplain CallingConvention#getTemporaries() temporary} registers.
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47 */
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48 public enum RegisterEffect {
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49 DESTROYS_REGISTERS, PRESERVES_REGISTERS
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50 }
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51
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52 /**
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53 * Constants for specifying whether a call is a leaf or not. A leaf function does not lock, GC
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54 * or throw exceptions. That is, the thread's execution state during the call is never inspected
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55 * by another thread.
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56 */
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57 public enum Transition {
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58 LEAF, NOT_LEAF;
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59 }
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60
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61 /**
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62 * Sentinel marker for a computed jump address.
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63 */
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64 public static final long JUMP_ADDRESS = 0xDEADDEADBEEFBEEFL;
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65
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66 /**
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67 * The descriptor of the call.
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68 */
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69 private final ForeignCallDescriptor descriptor;
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70
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71 /**
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72 * The entry point address of this call's target.
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73 */
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74 private long address;
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75
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76 /**
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77 * Non-null (eventually) iff this is a call to a compiled {@linkplain Stub stub}.
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78 */
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79 private Stub stub;
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80
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81 /**
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82 * The calling convention for this call.
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83 */
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84 private CallingConvention cc;
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85
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86 private final RegisterEffect effect;
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87
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88 private final Transition transition;
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89
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90 /**
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91 * Creates a {@link HotSpotRuntimeCallTarget}.
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92 *
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93 * @param descriptor the descriptor of the call
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94 * @param address the address of the code to call
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95 * @param effect specifies if the call destroys or preserves all registers (apart from
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96 * temporaries which are always destroyed)
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97 * @param ccType calling convention type
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98 * @param transition specifies if this is a {@linkplain #isLeaf() leaf} call
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99 */
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100 public static HotSpotRuntimeCallTarget create(ForeignCallDescriptor descriptor, long address, RegisterEffect effect, Type ccType, Transition transition) {
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101 CallingConvention targetCc = createCallingConvention(descriptor, ccType);
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102 return new HotSpotRuntimeCallTarget(descriptor, address, effect, transition, targetCc);
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103 }
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104
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105 /**
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106 * Gets a calling convention for a given descriptor and call type.
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107 */
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108 public static CallingConvention createCallingConvention(ForeignCallDescriptor descriptor, Type ccType) {
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109 HotSpotRuntime runtime = graalRuntime().getRuntime();
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110 Class<?>[] argumentTypes = descriptor.getArgumentTypes();
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111 JavaType[] parameterTypes = new JavaType[argumentTypes.length];
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112 for (int i = 0; i < parameterTypes.length; ++i) {
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113 parameterTypes[i] = asJavaType(argumentTypes[i], runtime);
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114 }
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115 TargetDescription target = graalRuntime().getTarget();
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116 JavaType returnType = asJavaType(descriptor.getResultType(), runtime);
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117 return runtime.lookupRegisterConfig().getCallingConvention(ccType, returnType, parameterTypes, target, false);
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118 }
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119
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120 private static JavaType asJavaType(Class type, HotSpotRuntime runtime) {
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121 if (WordBase.class.isAssignableFrom(type)) {
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122 return runtime.lookupJavaType(wordKind().toJavaClass());
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123 } else {
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124 return runtime.lookupJavaType(type);
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125 }
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126 }
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127
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128 public HotSpotRuntimeCallTarget(ForeignCallDescriptor descriptor, long address, RegisterEffect effect, Transition transition, CallingConvention cc) {
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129 this.address = address;
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130 this.effect = effect;
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131 this.transition = transition;
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132 this.descriptor = descriptor;
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133 this.cc = cc;
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134 }
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135
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136 @Override
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137 public String toString() {
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138 return (stub == null ? descriptor.toString() : stub) + "@0x" + Long.toHexString(address) + ":" + cc;
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139 }
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140
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141 public CallingConvention getCallingConvention() {
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142 return cc;
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143 }
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144
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145 public long getMaxCallTargetOffset() {
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146 return graalRuntime().getCompilerToVM().getMaxCallTargetOffset(address);
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147 }
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148
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149 public ForeignCallDescriptor getDescriptor() {
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150 return descriptor;
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151 }
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152
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153 public void setCompiledStub(Stub stub) {
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154 assert address == 0L : "cannot set stub for linkage that already has an address: " + this;
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155 this.stub = stub;
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156 }
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157
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158 /**
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159 * Determines if this is a call to a compiled {@linkplain Stub stub}.
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160 */
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161 public boolean isCompiledStub() {
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162 return address == 0L || stub != null;
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163 }
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164
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165 public void finalizeAddress(Backend backend) {
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166 if (address == 0) {
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167 assert stub != null : "linkage without an address must be a stub - forgot to register a Stub associated with " + descriptor + "?";
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168 InstalledCode code = stub.getCode(backend);
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169
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170 Set<Register> destroyedRegisters = stub.getDestroyedRegisters();
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171 AllocatableValue[] temporaryLocations = new AllocatableValue[destroyedRegisters.size()];
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172 int i = 0;
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173 for (Register reg : destroyedRegisters) {
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174 temporaryLocations[i++] = reg.asValue();
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175 }
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176 // Update calling convention with temporaries
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177 cc = new CallingConvention(temporaryLocations, cc.getStackSize(), cc.getReturn(), cc.getArguments());
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178 address = code.getStart();
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179 }
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180 }
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181
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182 public long getAddress() {
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183 assert address != 0L : "address not yet finalized: " + this;
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184 return address;
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185 }
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186
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187 @Override
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188 public boolean destroysRegisters() {
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189 return effect == DESTROYS_REGISTERS;
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190 }
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191
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192 /**
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193 * Determines if this is call to a function that does not lock, GC or throw exceptions. That is,
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194 * the thread's execution state during the call is never inspected by another thread.
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195 */
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196 public boolean isLeaf() {
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197 return transition == Transition.LEAF;
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198 }
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199 }