1 /* 2 * Copyright (c) 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.code.site; 24 25 import java.util.Map; 26 import java.util.Objects; 27 28 import jdk.vm.ci.code.BytecodePosition; 29 import jdk.vm.ci.code.DebugInfo; 30 import jdk.vm.ci.code.ReferenceMap; 31 import jdk.vm.ci.code.Register; 32 import jdk.vm.ci.code.RegisterSaveLayout; 33 import jdk.vm.ci.meta.MetaUtil; 34 35 /** 36 * Represents an infopoint with associated debug info. Note that safepoints are also infopoints. 37 */ 38 public class Infopoint extends Site implements Comparable<Infopoint> { 39 40 public final DebugInfo debugInfo; 41 42 public final InfopointReason reason; 43 Infopoint(int pcOffset, DebugInfo debugInfo, InfopointReason reason)44 public Infopoint(int pcOffset, DebugInfo debugInfo, InfopointReason reason) { 45 super(pcOffset); 46 this.debugInfo = debugInfo; 47 this.reason = reason; 48 } 49 50 @Override toString()51 public String toString() { 52 StringBuilder sb = new StringBuilder(); 53 sb.append(pcOffset); 54 sb.append("[<infopoint>]"); 55 appendDebugInfo(sb, debugInfo); 56 return sb.toString(); 57 } 58 59 @Override compareTo(Infopoint o)60 public int compareTo(Infopoint o) { 61 if (pcOffset < o.pcOffset) { 62 return -1; 63 } else if (pcOffset > o.pcOffset) { 64 return 1; 65 } 66 return this.reason.compareTo(o.reason); 67 } 68 69 @Override equals(Object obj)70 public boolean equals(Object obj) { 71 if (this == obj) { 72 return true; 73 } 74 if (obj != null && obj.getClass() == getClass()) { 75 Infopoint that = (Infopoint) obj; 76 if (this.pcOffset == that.pcOffset && Objects.equals(this.debugInfo, that.debugInfo) && Objects.equals(this.reason, that.reason)) { 77 return true; 78 } 79 } 80 return false; 81 } 82 appendDebugInfo(StringBuilder sb, DebugInfo info)83 protected static void appendDebugInfo(StringBuilder sb, DebugInfo info) { 84 if (info != null) { 85 ReferenceMap refMap = info.getReferenceMap(); 86 if (refMap != null) { 87 sb.append(refMap.toString()); 88 sb.append(']'); 89 } 90 RegisterSaveLayout calleeSaveInfo = info.getCalleeSaveInfo(); 91 if (calleeSaveInfo != null) { 92 sb.append(" callee-save-info["); 93 String sep = ""; 94 for (Map.Entry<Register, Integer> e : calleeSaveInfo.registersToSlots(true).entrySet()) { 95 sb.append(sep).append(e.getKey()).append("->").append(e.getValue()); 96 sep = ", "; 97 } 98 sb.append(']'); 99 } 100 BytecodePosition codePos = info.getBytecodePosition(); 101 if (codePos != null) { 102 MetaUtil.appendLocation(sb.append(" "), codePos.getMethod(), codePos.getBCI()); 103 if (info.hasFrame()) { 104 sb.append(" #locals=").append(info.frame().numLocals).append(" #expr=").append(info.frame().numStack); 105 if (info.frame().numLocks > 0) { 106 sb.append(" #locks=").append(info.frame().numLocks); 107 } 108 } 109 } 110 } 111 } 112 } 113