--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/CompilationCounters.java 2017-02-15 16:59:32.107053974 -0800 @@ -0,0 +1,101 @@ +/* + * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package org.graalvm.compiler.hotspot; + +import static org.graalvm.compiler.hotspot.HotSpotGraalCompiler.fmt; +import static org.graalvm.compiler.hotspot.HotSpotGraalCompiler.str; + +import java.util.Comparator; +import java.util.HashMap; +import java.util.Map; +import java.util.Map.Entry; +import java.util.SortedSet; +import java.util.TreeSet; + +import org.graalvm.compiler.debug.TTY; +import org.graalvm.compiler.options.Option; +import org.graalvm.compiler.options.OptionType; +import org.graalvm.compiler.options.OptionValue; +import org.graalvm.compiler.options.StableOptionValue; + +import jdk.vm.ci.code.CompilationRequest; +import jdk.vm.ci.meta.ResolvedJavaMethod; + +class CompilationCounters { + + public static class Options { + // @formatter:off + @Option(help = "The number of compilations allowed for any method before " + + "the VM exits (a value of 0 means there is no limit).", type = OptionType.Debug) + public static final OptionValue CompilationCountLimit = new StableOptionValue<>(0); + // @formatter:on + } + + CompilationCounters() { + TTY.println("Warning: Compilation counters enabled, excessive recompilation of a method will cause a failure!"); + } + + private final Map counters = new HashMap<>(); + + /** + * Counts the number of compilations for the {@link ResolvedJavaMethod} of the + * {@link CompilationRequest}. If the number of compilations exceeds + * {@link Options#CompilationCountLimit} this method prints an error message and exits the VM. + * + * @param method the method about to be compiled + */ + synchronized void countCompilation(ResolvedJavaMethod method) { + Integer val = counters.get(method); + val = val != null ? val + 1 : 1; + counters.put(method, val); + if (val > Options.CompilationCountLimit.getValue()) { + TTY.printf("Error. Method %s was compiled too many times. Number of compilations: %d\n", fmt(method), + CompilationCounters.Options.CompilationCountLimit.getValue()); + TTY.println("==================================== High compilation counters ===================================="); + SortedSet> sortedCounters = new TreeSet<>(new CounterComparator()); + for (Map.Entry e : counters.entrySet()) { + sortedCounters.add(e); + } + for (Map.Entry entry : sortedCounters) { + if (entry.getValue() >= Options.CompilationCountLimit.getValue() / 2) { + TTY.out.printf("%d\t%s%n", entry.getValue(), str(entry.getKey())); + } + } + TTY.flush(); + System.exit(-1); + } + } + + static final class CounterComparator implements Comparator> { + @Override + public int compare(Entry o1, Entry o2) { + if (o1.getValue() < o2.getValue()) { + return -1; + } + if (o1.getValue() > o2.getValue()) { + return 1; + } + return str(o1.getKey()).compareTo(str(o2.getKey())); + } + } +}