--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/CompilationCounters.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,102 @@
+/*
+ * 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.OptionValues;
+import org.graalvm.compiler.options.OptionKey;
+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 OptionKey<Integer> CompilationCountLimit = new OptionKey<>(0);
+        // @formatter:on
+    }
+
+    private final OptionValues options;
+
+    CompilationCounters(OptionValues options) {
+        TTY.println("Warning: Compilation counters enabled, excessive recompilation of a method will cause a failure!");
+        this.options = options;
+    }
+
+    private final Map<ResolvedJavaMethod, Integer> 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(options)) {
+            TTY.printf("Error. Method %s was compiled too many times. Number of compilations: %d\n", fmt(method),
+                            CompilationCounters.Options.CompilationCountLimit.getValue(options));
+            TTY.println("==================================== High compilation counters ====================================");
+            SortedSet<Map.Entry<ResolvedJavaMethod, Integer>> sortedCounters = new TreeSet<>(new CounterComparator());
+            for (Map.Entry<ResolvedJavaMethod, Integer> e : counters.entrySet()) {
+                sortedCounters.add(e);
+            }
+            for (Map.Entry<ResolvedJavaMethod, Integer> entry : sortedCounters) {
+                if (entry.getValue() >= Options.CompilationCountLimit.getValue(options) / 2) {
+                    TTY.out.printf("%d\t%s%n", entry.getValue(), str(entry.getKey()));
+                }
+            }
+            TTY.flush();
+            System.exit(-1);
+        }
+    }
+
+    static final class CounterComparator implements Comparator<Map.Entry<ResolvedJavaMethod, Integer>> {
+        @Override
+        public int compare(Entry<ResolvedJavaMethod, Integer> o1, Entry<ResolvedJavaMethod, Integer> o2) {
+            if (o1.getValue() < o2.getValue()) {
+                return -1;
+            }
+            if (o1.getValue() > o2.getValue()) {
+                return 1;
+            }
+            return str(o1.getKey()).compareTo(str(o2.getKey()));
+        }
+    }
+}