1 /* 2 * Copyright (c) 2012, 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.meta; 24 25 /** 26 * An implementation of {@link ProfilingInfo} that can used in the absence of real profile 27 * information. 28 */ 29 public final class DefaultProfilingInfo implements ProfilingInfo { 30 31 private static final ProfilingInfo[] NO_PROFILING_INFO = new ProfilingInfo[]{new DefaultProfilingInfo(TriState.TRUE), new DefaultProfilingInfo(TriState.FALSE), 32 new DefaultProfilingInfo(TriState.UNKNOWN)}; 33 34 private final TriState exceptionSeen; 35 36 DefaultProfilingInfo(TriState exceptionSeen) { 37 this.exceptionSeen = exceptionSeen; 38 } 39 40 @Override 41 public int getCodeSize() { 42 return 0; 43 } 44 45 @Override 46 public JavaTypeProfile getTypeProfile(int bci) { 47 return null; 48 } 49 50 @Override 51 public JavaMethodProfile getMethodProfile(int bci) { 52 return null; 53 } 54 55 @Override 56 public double getBranchTakenProbability(int bci) { 57 return -1; 58 } 59 60 @Override 61 public double[] getSwitchProbabilities(int bci) { 62 return null; 63 } 64 65 @Override 66 public TriState getExceptionSeen(int bci) { 67 return exceptionSeen; 68 } 69 70 @Override 71 public TriState getNullSeen(int bci) { 72 return TriState.UNKNOWN; 73 } 74 75 @Override 76 public int getExecutionCount(int bci) { 77 return -1; 78 } 79 80 public static ProfilingInfo get(TriState exceptionSeen) { 81 return NO_PROFILING_INFO[exceptionSeen.ordinal()]; 82 } 83 84 @Override 85 public int getDeoptimizationCount(DeoptimizationReason reason) { 86 return 0; 87 } 88 89 @Override 90 public boolean isMature() { 91 return false; 92 } 93 94 @Override 95 public String toString() { 96 return "BaseProfilingInfo<" + this.toString(null, "; ") + ">"; 97 } 98 99 public void setMature() { 100 // Do nothing 101 } 102 103 public boolean setCompilerIRSize(Class<?> irType, int nodeCount) { 104 return false; 105 } 106 107 public int getCompilerIRSize(Class<?> irType) { 108 return -1; 109 } 110 }