1 /* 2 * Copyright (c) 2016, 2019, 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 24 25 package org.graalvm.compiler.hotspot; 26 27 import static org.graalvm.compiler.hotspot.HotSpotGraalCompiler.fmt; 28 import static org.graalvm.compiler.hotspot.HotSpotGraalCompiler.str; 29 30 import java.util.Comparator; 31 import java.util.HashMap; 32 import java.util.Map; 33 import java.util.Map.Entry; 34 import java.util.SortedSet; 35 import java.util.TreeSet; 36 37 import org.graalvm.compiler.debug.TTY; 38 import org.graalvm.compiler.options.Option; 39 import org.graalvm.compiler.options.OptionKey; 40 import org.graalvm.compiler.options.OptionType; 41 import org.graalvm.compiler.options.OptionValues; 42 43 import jdk.vm.ci.code.CompilationRequest; 44 import jdk.vm.ci.meta.ResolvedJavaMethod; 45 46 class CompilationCounters { 47 48 public static class Options { 49 // @formatter:off 50 @Option(help = "The number of compilations allowed for any method before " + 51 "the VM exits (a value of 0 means there is no limit).", type = OptionType.Debug) 52 public static final OptionKey<Integer> CompilationCountLimit = new OptionKey<>(0); 53 // @formatter:on 54 } 55 56 private final OptionValues options; 57 58 CompilationCounters(OptionValues options) { 59 TTY.println("Warning: Compilation counters enabled, excessive recompilation of a method will cause a failure!"); 60 this.options = options; 61 } 62 63 private final Map<ResolvedJavaMethod, Integer> counters = new HashMap<>(); 64 65 /** 66 * Counts the number of compilations for the {@link ResolvedJavaMethod} of the 67 * {@link CompilationRequest}. If the number of compilations exceeds 68 * {@link Options#CompilationCountLimit} this method prints an error message and exits the VM. 69 * 70 * @param method the method about to be compiled 71 */ 72 synchronized void countCompilation(ResolvedJavaMethod method) { 73 Integer val = counters.get(method); 74 val = val != null ? val + 1 : 1; 75 counters.put(method, val); 76 if (val > Options.CompilationCountLimit.getValue(options)) { 77 TTY.printf("Error. Method %s was compiled too many times. Number of compilations: %d\n", fmt(method), 78 CompilationCounters.Options.CompilationCountLimit.getValue(options)); 79 TTY.println("==================================== High compilation counters ===================================="); 80 SortedSet<Map.Entry<ResolvedJavaMethod, Integer>> sortedCounters = new TreeSet<>(new CounterComparator()); 81 for (Map.Entry<ResolvedJavaMethod, Integer> e : counters.entrySet()) { 82 sortedCounters.add(e); 83 } 84 for (Map.Entry<ResolvedJavaMethod, Integer> entry : sortedCounters) { 85 if (entry.getValue() >= Options.CompilationCountLimit.getValue(options) / 2) { 86 TTY.out.printf("%d\t%s%n", entry.getValue(), str(entry.getKey())); 87 } 88 } 89 TTY.flush(); 90 HotSpotGraalServices.exit(-1); 91 } 92 } 93 94 static final class CounterComparator implements Comparator<Map.Entry<ResolvedJavaMethod, Integer>> { 95 @Override 96 public int compare(Entry<ResolvedJavaMethod, Integer> o1, Entry<ResolvedJavaMethod, Integer> o2) { 97 if (o1.getValue() < o2.getValue()) { 98 return -1; 99 } 100 if (o1.getValue() > o2.getValue()) { 101 return 1; 102 } 103 return str(o1.getKey()).compareTo(str(o2.getKey())); 104 } 105 } 106 }