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annotate graal/com.oracle.graal.hotspot.amd64/src/com/oracle/graal/hotspot/amd64/AMD64HotSpotBackend.java @ 8370:c2e39aa097c5

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removed unnecessary MethodEndBreakpointGuards option
author Doug Simon <doug.simon@oracle.com>
date Tue, 19 Mar 2013 14:08:54 +0100
parents ae15e5d0571b
children 9be78aeab2e1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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.amd64;
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24
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25 import static com.oracle.graal.amd64.AMD64.*;
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26 import static com.oracle.graal.api.code.CallingConvention.Type.*;
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27 import static com.oracle.graal.api.code.ValueUtil.*;
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28 import static com.oracle.graal.phases.GraalOptions.*;
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29
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30 import java.lang.reflect.*;
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31
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32 import sun.misc.*;
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33
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34 import com.oracle.graal.amd64.*;
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35 import com.oracle.graal.api.code.*;
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36 import com.oracle.graal.api.code.RuntimeCallTarget.Descriptor;
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37 import com.oracle.graal.api.meta.*;
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38 import com.oracle.graal.asm.*;
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39 import com.oracle.graal.asm.amd64.*;
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40 import com.oracle.graal.asm.amd64.AMD64Assembler.ConditionFlag;
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41 import com.oracle.graal.compiler.gen.*;
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42 import com.oracle.graal.hotspot.*;
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43 import com.oracle.graal.hotspot.bridge.*;
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44 import com.oracle.graal.hotspot.meta.*;
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45 import com.oracle.graal.lir.*;
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46 import com.oracle.graal.lir.amd64.*;
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47 import com.oracle.graal.lir.asm.*;
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48 import com.oracle.graal.nodes.*;
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49 import com.oracle.graal.phases.*;
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50
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51 /**
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52 * HotSpot AMD64 specific backend.
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53 */
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54 public class AMD64HotSpotBackend extends HotSpotBackend {
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55
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56 private static final Unsafe unsafe = Unsafe.getUnsafe();
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57 public static final Descriptor EXCEPTION_HANDLER = new Descriptor("exceptionHandler", true, void.class);
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58 public static final Descriptor DEOPT_HANDLER = new Descriptor("deoptHandler", true, void.class);
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59 public static final Descriptor IC_MISS_HANDLER = new Descriptor("icMissHandler", true, void.class);
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60
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61 public AMD64HotSpotBackend(HotSpotRuntime runtime, TargetDescription target) {
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62 super(runtime, target);
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63 }
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64
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65 @Override
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66 public LIRGenerator newLIRGenerator(StructuredGraph graph, FrameMap frameMap, ResolvedJavaMethod method, LIR lir) {
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67 return new AMD64HotSpotLIRGenerator(graph, runtime(), target, frameMap, method, lir);
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68 }
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69
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70 /**
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71 * Emits code to do stack overflow checking.
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72 *
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73 * @param afterFrameInit specifies if the stack pointer has already been adjusted to allocate
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74 * the current frame
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75 */
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76 protected static void emitStackOverflowCheck(TargetMethodAssembler tasm, boolean afterFrameInit) {
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77 if (GraalOptions.StackShadowPages > 0) {
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78
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79 AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm;
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80 int frameSize = tasm.frameMap.frameSize();
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81 if (frameSize > 0) {
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82 int lastFramePage = frameSize / unsafe.pageSize();
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83 // emit multiple stack bangs for methods with frames larger than a page
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84 for (int i = 0; i <= lastFramePage; i++) {
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85 int disp = (i + GraalOptions.StackShadowPages) * unsafe.pageSize();
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86 if (afterFrameInit) {
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87 disp -= frameSize;
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88 }
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89 tasm.blockComment("[stack overflow check]");
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90 asm.movq(new AMD64Address(rsp, -disp), AMD64.rax);
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91 }
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92 }
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93 }
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94 }
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95
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96 class HotSpotFrameContext implements FrameContext {
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97
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98 @Override
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99 public void enter(TargetMethodAssembler tasm) {
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100 FrameMap frameMap = tasm.frameMap;
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101 int frameSize = frameMap.frameSize();
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102
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103 AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm;
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104 emitStackOverflowCheck(tasm, false);
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105 asm.decrementq(rsp, frameSize);
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106 if (GraalOptions.ZapStackOnMethodEntry) {
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107 final int intSize = 4;
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108 for (int i = 0; i < frameSize / intSize; ++i) {
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109 asm.movl(new AMD64Address(rsp, i * intSize), 0xC1C1C1C1);
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110 }
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111 }
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112 CalleeSaveLayout csl = frameMap.registerConfig.getCalleeSaveLayout();
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113 if (csl != null && csl.size != 0) {
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114 int frameToCSA = frameMap.offsetToCalleeSaveArea();
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115 assert frameToCSA >= 0;
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116 asm.save(csl, frameToCSA);
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117 }
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118 }
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119
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120 @Override
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121 public void leave(TargetMethodAssembler tasm) {
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122 int frameSize = tasm.frameMap.frameSize();
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123 AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm;
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124 CalleeSaveLayout csl = tasm.frameMap.registerConfig.getCalleeSaveLayout();
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125
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126 if (csl != null && csl.size != 0) {
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127 tasm.compilationResult.setRegisterRestoreEpilogueOffset(asm.codeBuffer.position());
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128 // saved all registers, restore all registers
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129 int frameToCSA = tasm.frameMap.offsetToCalleeSaveArea();
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130 asm.restore(csl, frameToCSA);
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131 }
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132
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133 asm.incrementq(rsp, frameSize);
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134 }
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135 }
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136
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137 @Override
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138 public TargetMethodAssembler newAssembler(LIRGenerator lirGen, CompilationResult compilationResult) {
5251
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139 // Omit the frame if the method:
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140 // - has no spill slots or other slots allocated during register allocation
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141 // - has no callee-saved registers
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142 // - has no incoming arguments passed on the stack
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143 // - has no instructions with debug info
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144 AMD64HotSpotLIRGenerator gen = (AMD64HotSpotLIRGenerator) lirGen;
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145 FrameMap frameMap = gen.frameMap;
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146 LIR lir = gen.lir;
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147 boolean omitFrame = CanOmitFrame && !frameMap.frameNeedsAllocating() && !lir.hasArgInCallerFrame();
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148
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149 AbstractAssembler masm = new AMD64MacroAssembler(target, frameMap.registerConfig);
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150 HotSpotFrameContext frameContext = omitFrame ? null : new HotSpotFrameContext();
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151 TargetMethodAssembler tasm = new TargetMethodAssembler(target, runtime(), frameMap, masm, frameContext, compilationResult);
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152 tasm.setFrameSize(frameMap.frameSize());
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153 StackSlot deoptimizationRescueSlot = gen.deoptimizationRescueSlot;
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154 if (deoptimizationRescueSlot != null) {
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155 tasm.compilationResult.setCustomStackAreaOffset(frameMap.offsetForStackSlot(deoptimizationRescueSlot));
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156 }
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157 return tasm;
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158 }
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159
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160 @Override
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161 public void emitCode(TargetMethodAssembler tasm, ResolvedJavaMethod method, LIRGenerator lirGen) {
5233
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162 AMD64MacroAssembler asm = (AMD64MacroAssembler) tasm.asm;
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163 FrameMap frameMap = tasm.frameMap;
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parents: 5541
diff changeset
164 RegisterConfig regConfig = frameMap.registerConfig;
6494
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Doug Simon <doug.simon@oracle.com>
parents: 6493
diff changeset
165 HotSpotVMConfig config = runtime().config;
7143
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166 boolean isStatic = Modifier.isStatic(method.getModifiers());
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167 Label unverifiedStub = isStatic ? null : new Label();
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168
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169 // Emit the prefix
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170
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171 if (!isStatic) {
6462
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diff changeset
172 tasm.recordMark(Marks.MARK_UNVERIFIED_ENTRY);
7530
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diff changeset
173 CallingConvention cc = regConfig.getCallingConvention(JavaCallee, null, new JavaType[]{runtime().lookupJavaType(Object.class)}, target, false);
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diff changeset
174 Register inlineCacheKlass = rax; // see definition of IC_Klass in
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diff changeset
175 // c1_LIRAssembler_x86.cpp
6470
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diff changeset
176 Register receiver = asRegister(cc.getArgument(0));
8167
7f57c30575c8 Make AMD64Address a low-level representation for use by the assembler only.
Roland Schatz <roland.schatz@oracle.com>
parents: 8166
diff changeset
177 AMD64Address src = new AMD64Address(receiver, config.hubOffset);
5233
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178
5235
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parents: 5233
diff changeset
179 asm.cmpq(inlineCacheKlass, src);
7824
dc497f975c37 Changes in backend due to assembly renamings. Use jccb in two places for smaller code size.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7817
diff changeset
180 asm.jcc(ConditionFlag.NotEqual, unverifiedStub);
5233
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181 }
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182
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183 asm.align(config.codeEntryAlignment);
6676
090868cbcda6 Graal infrastructure for OnStackReplacement
Lukas Stadler <lukas.stadler@jku.at>
parents: 6675
diff changeset
184 tasm.recordMark(Marks.MARK_OSR_ENTRY);
6462
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diff changeset
185 tasm.recordMark(Marks.MARK_VERIFIED_ENTRY);
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186
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187 // Emit code for the LIR
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188 lirGen.lir.emitCode(tasm);
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189
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190 boolean frameOmitted = tasm.frameContext == null;
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191 if (!frameOmitted) {
8334
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 8333
diff changeset
192 tasm.recordMark(Marks.MARK_EXCEPTION_HANDLER_ENTRY);
488c6d5e3b77 Put exception handler entry back.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 8333
diff changeset
193 AMD64Call.directCall(tasm, asm, runtime().lookupRuntimeCall(EXCEPTION_HANDLER), null, false, null);
6462
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diff changeset
194 tasm.recordMark(Marks.MARK_DEOPT_HANDLER_ENTRY);
8333
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff changeset
195 AMD64Call.directCall(tasm, asm, runtime().lookupRuntimeCall(DEOPT_HANDLER), null, false, null);
5251
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196 } else {
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197 // No need to emit the stubs for entries back into the method since
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198 // it has no calls that can cause such "return" entries
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199 assert !frameMap.accessesCallerFrame() : method;
5251
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200 }
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201
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diff changeset
202 if (unverifiedStub != null) {
5233
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diff changeset
203 asm.bind(unverifiedStub);
7814
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents: 7809
diff changeset
204 AMD64Call.directJmp(tasm, asm, runtime().lookupRuntimeCall(IC_MISS_HANDLER));
5233
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205 }
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parents:
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206 }
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207 }