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.services; 24 25 import jdk.vm.ci.hotspot.HotSpotVMConfig; 26 import jdk.vm.ci.runtime.services.JVMCICompilerFactory; 27 28 /** 29 * HotSpot extensions to {@link JVMCICompilerFactory}. 30 */ 31 public abstract class HotSpotJVMCICompilerFactory extends JVMCICompilerFactory { 32 33 /** 34 * Gets 0 or more prefixes identifying classes that should by compiled by C1 in simple mode 35 * (i.e., {@code CompLevel_simple}) when HotSpot is running with tiered compilation. The 36 * prefixes should be class or package names using "/" as the separator, e.g. "jdk/vm/ci". 37 * 38 * @return 0 or more Strings identifying packages that should by compiled by the first tier only 39 * or null if no redirection to C1 should be performed. 40 */ 41 public String[] getTrivialPrefixes() { 42 return null; 43 } 44 45 /** 46 * Determines if this object may want to adjust the compilation level for a method that is being 47 * scheduled by the VM for compilation. The legal return values and their meanings are: 48 * <ul> 49 * <li>0 - no adjustment</li> 50 * <li>1 - adjust based on declaring class of method</li> 51 * <li>2 - adjust based on declaring class, name and signature of method</li> 52 * </ul> 53 */ 54 public int getCompilationLevelAdjustment(HotSpotVMConfig config) { 55 return config.compLevelAdjustmentNone; 56 } 57 58 /** 59 * Potentially modifies the compilation level currently selected by the VM compilation policy 60 * for a method. 61 * 62 * @param config object for reading HotSpot {@code CompLevel} enum values 63 * @param declaringClass the class in which the method is declared 64 * @param name the name of the method or {@code null} depending on the value that was returned 65 * by {@link #getCompilationLevelAdjustment(HotSpotVMConfig)} 66 * @param signature the signature of the method or {@code null} depending on the value that was 67 * returned by {@link #getCompilationLevelAdjustment(HotSpotVMConfig)} 68 * @param isOsr specifies if the compilation being scheduled in an OSR compilation 69 * @param level the compilation level currently selected by the VM compilation policy 70 * @return the compilation level to use for the compilation being scheduled (must be a valid 71 * {@code CompLevel} enum value) 72 */ 73 public int adjustCompilationLevel(HotSpotVMConfig config, Class<?> declaringClass, String name, String signature, boolean isOsr, int level) { 74 throw new InternalError("Should not reach here"); 75 } 76 }