1 /* 2 * Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot; 24 25 import jdk.vm.ci.code.BytecodeFrame; 26 import jdk.vm.ci.code.CompiledCode; 27 import jdk.vm.ci.code.StackSlot; 28 import jdk.vm.ci.code.site.DataPatch; 29 import jdk.vm.ci.code.site.Infopoint; 30 import jdk.vm.ci.code.site.Site; 31 import jdk.vm.ci.meta.Assumptions.Assumption; 32 import jdk.vm.ci.meta.ResolvedJavaMethod; 33 34 /** 35 * A {@link CompiledCode} with additional HotSpot-specific information required for installing the 36 * code in HotSpot's code cache. 37 */ 38 public class HotSpotCompiledCode implements CompiledCode { 39 40 /** 41 * The name of this compilation unit. 42 */ 43 protected final String name; 44 45 /** 46 * The buffer containing the emitted machine code. 47 */ 48 protected final byte[] targetCode; 49 50 /** 51 * The leading number of bytes in {@link #targetCode} containing the emitted machine code. 52 */ 53 protected final int targetCodeSize; 54 55 /** 56 * A list of code annotations describing special sites in {@link #targetCode}. 57 */ 58 protected final Site[] sites; 59 60 /** 61 * A list of {@link Assumption} this code relies on. 62 */ 63 protected final Assumption[] assumptions; 64 65 /** 66 * The list of the methods whose bytecodes were used as input to the compilation. If 67 * {@code null}, then the compilation did not record method dependencies. Otherwise, the first 68 * element of this array is the root method of the compilation. 69 */ 70 protected final ResolvedJavaMethod[] methods; 71 72 /** 73 * A list of comments that will be included in code dumps. 74 */ 75 protected final Comment[] comments; 76 77 /** 78 * The data section containing serialized constants for the emitted machine code. 79 */ 80 protected final byte[] dataSection; 81 82 /** 83 * The minimum alignment of the data section. 84 */ 85 protected final int dataSectionAlignment; 86 87 /** 88 * A list of relocations in the {@link #dataSection}. 89 */ 90 protected final DataPatch[] dataSectionPatches; 91 92 /** 93 * A flag determining whether this code is immutable and position independent. 94 */ 95 protected final boolean isImmutablePIC; 96 97 /** 98 * The total size of the stack frame of this compiled method. 99 */ 100 protected final int totalFrameSize; 101 102 /** 103 * The deopt rescue slot. Must be non-null if there is a safepoint in the method. 104 */ 105 protected final StackSlot deoptRescueSlot; 106 107 public static class Comment { 108 109 public final String text; 110 public final int pcOffset; 111 112 public Comment(int pcOffset, String text) { 113 this.text = text; 114 this.pcOffset = pcOffset; 115 } 116 } 117 118 public HotSpotCompiledCode(String name, byte[] targetCode, int targetCodeSize, Site[] sites, Assumption[] assumptions, ResolvedJavaMethod[] methods, Comment[] comments, byte[] dataSection, 119 int dataSectionAlignment, DataPatch[] dataSectionPatches, boolean isImmutablePIC, int totalFrameSize, StackSlot deoptRescueSlot) { 120 this.name = name; 121 this.targetCode = targetCode; 122 this.targetCodeSize = targetCodeSize; 123 this.sites = sites; 124 this.assumptions = assumptions; 125 this.methods = methods; 126 127 this.comments = comments; 128 this.dataSection = dataSection; 129 this.dataSectionAlignment = dataSectionAlignment; 130 this.dataSectionPatches = dataSectionPatches; 131 this.isImmutablePIC = isImmutablePIC; 132 this.totalFrameSize = totalFrameSize; 133 this.deoptRescueSlot = deoptRescueSlot; 134 135 assert validateFrames(); 136 } 137 138 public String getName() { 139 return name; 140 } 141 142 @Override 143 public String toString() { 144 return name; 145 } 146 147 /** 148 * Ensure that all the frames passed into the VM are properly formatted with an empty or illegal 149 * slot following double word slots. 150 */ 151 private boolean validateFrames() { 152 for (Site site : sites) { 153 if (site instanceof Infopoint) { 154 Infopoint info = (Infopoint) site; 155 if (info.debugInfo != null) { 156 BytecodeFrame frame = info.debugInfo.frame(); 157 assert frame == null || frame.validateFormat(); 158 } 159 } 160 } 161 return true; 162 } 163 }