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.hotspot; 24 25 import java.util.Collections; 26 import java.util.Map; 27 import jdk.vm.ci.runtime.JVMCICompilerFactory; 28 29 /** 30 * HotSpot extensions to {@link JVMCICompilerFactory}. 31 */ 32 public abstract class HotSpotJVMCICompilerFactory implements JVMCICompilerFactory { 33 34 /** 35 * Gets 0 or more prefixes identifying classes that should by compiled by C1 in simple mode 36 * (i.e., {@code CompLevel_simple}) when HotSpot is running with tiered compilation. The 37 * prefixes should be class or package names using "/" as the separator, e.g. "jdk/vm/ci". 38 * 39 * @return 0 or more Strings identifying packages that should by compiled by the first tier only 40 * or null if no redirection to C1 should be performed. 41 */ 42 public String[] getTrivialPrefixes() { 43 return null; 44 } 45 46 public enum CompilationLevelAdjustment { 47 /** 48 * No adjustment. 49 */ 50 None, 51 52 /** 53 * Adjust based on declaring class of method. 54 */ 55 ByHolder, 56 57 /** 58 * Adjust based on declaring class, name and signature of method. 59 */ 60 ByFullSignature 61 } 62 63 /** 64 * Determines if this object may want to adjust the compilation level for a method that is being 65 * scheduled by the VM for compilation. 66 */ 67 public CompilationLevelAdjustment getCompilationLevelAdjustment() { 68 return CompilationLevelAdjustment.None; 69 } 70 71 public enum CompilationLevel { 72 None, 73 Simple, 74 LimitedProfile, 75 FullProfile, 76 FullOptimization 77 } 78 79 /** 80 * Potentially modifies the compilation level currently selected by the VM compilation policy 81 * for a method. 82 * 83 * @param declaringClass the class in which the method is declared 84 * @param name the name of the method or {@code null} depending on the value that was returned 85 * by {@link #getCompilationLevelAdjustment()} 86 * @param signature the signature of the method or {@code null} depending on the value that was 87 * returned by {@link #getCompilationLevelAdjustment()} 88 * @param isOsr specifies if the compilation being scheduled in an OSR compilation 89 * @param level the compilation level currently selected by the VM compilation policy 90 * @return the compilation level to use for the compilation being scheduled (must be a valid 91 * {@code CompLevel} enum value) 92 */ 93 public CompilationLevel adjustCompilationLevel(Class<?> declaringClass, String name, String signature, boolean isOsr, CompilationLevel level) { 94 throw new InternalError("Should not reach here"); 95 } 96 97 /** 98 * Provides compiler specific platform MBeans. These MBeans will be automatically 99 * exposed once the management system gets initialized. 100 * 101 * @return map from MBean names to their instances 102 */ 103 public Map<String, Object> mbeans() { 104 return Collections.emptyMap(); 105 } 106 }