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/*
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* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.hotspot;
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import static org.graalvm.compiler.hotspot.HotSpotGraalCompiler.fmt;
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import static org.graalvm.compiler.hotspot.HotSpotGraalCompiler.str;
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import java.util.Comparator;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.SortedSet;
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import java.util.TreeSet;
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import org.graalvm.compiler.debug.TTY;
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import org.graalvm.compiler.options.Option;
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import org.graalvm.compiler.options.OptionKey;
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import org.graalvm.compiler.options.OptionType;
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import org.graalvm.compiler.options.OptionValues;
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import jdk.vm.ci.code.CompilationRequest;
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import jdk.vm.ci.meta.ResolvedJavaMethod;
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class CompilationCounters {
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public static class Options {
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// @formatter:off
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@Option(help = "The number of compilations allowed for any method before " +
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"the VM exits (a value of 0 means there is no limit).", type = OptionType.Debug)
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public static final OptionKey<Integer> CompilationCountLimit = new OptionKey<>(0);
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// @formatter:on
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}
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private final OptionValues options;
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CompilationCounters(OptionValues options) {
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TTY.println("Warning: Compilation counters enabled, excessive recompilation of a method will cause a failure!");
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this.options = options;
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}
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private final Map<ResolvedJavaMethod, Integer> counters = new HashMap<>();
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/**
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* Counts the number of compilations for the {@link ResolvedJavaMethod} of the
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* {@link CompilationRequest}. If the number of compilations exceeds
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* {@link Options#CompilationCountLimit} this method prints an error message and exits the VM.
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*
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* @param method the method about to be compiled
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*/
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synchronized void countCompilation(ResolvedJavaMethod method) {
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Integer val = counters.get(method);
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val = val != null ? val + 1 : 1;
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counters.put(method, val);
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if (val > Options.CompilationCountLimit.getValue(options)) {
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TTY.printf("Error. Method %s was compiled too many times. Number of compilations: %d\n", fmt(method),
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CompilationCounters.Options.CompilationCountLimit.getValue(options));
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TTY.println("==================================== High compilation counters ====================================");
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SortedSet<Map.Entry<ResolvedJavaMethod, Integer>> sortedCounters = new TreeSet<>(new CounterComparator());
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for (Map.Entry<ResolvedJavaMethod, Integer> e : counters.entrySet()) {
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sortedCounters.add(e);
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}
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for (Map.Entry<ResolvedJavaMethod, Integer> entry : sortedCounters) {
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if (entry.getValue() >= Options.CompilationCountLimit.getValue(options) / 2) {
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TTY.out.printf("%d\t%s%n", entry.getValue(), str(entry.getKey()));
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}
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}
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TTY.flush();
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HotSpotGraalServices.exit(-1);
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}
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}
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static final class CounterComparator implements Comparator<Map.Entry<ResolvedJavaMethod, Integer>> {
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@Override
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public int compare(Entry<ResolvedJavaMethod, Integer> o1, Entry<ResolvedJavaMethod, Integer> o2) {
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if (o1.getValue() < o2.getValue()) {
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return -1;
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}
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if (o1.getValue() > o2.getValue()) {
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return 1;
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}
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return str(o1.getKey()).compareTo(str(o2.getKey()));
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}
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}
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}
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