--- /dev/null 2017-07-07 09:32:03.000000000 -0700 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.debug/src/org/graalvm/compiler/debug/CloseableCounter.java 2017-07-07 09:32:03.000000000 -0700 @@ -0,0 +1,97 @@ +/* + * Copyright (c) 2015, 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.debug; + +/** + * A helper class for {@link AbstractKey}s that can nest and need to split out accumulated and flat + * values for some kind of counter-like measurement. + */ +public abstract class CloseableCounter implements DebugCloseable { + + protected final DebugContext debug; + protected final CloseableCounter parent; + protected final AccumulatedKey counter; + protected final long start; + protected long nestedAmountToSubtract; + + CloseableCounter(DebugContext debug, CloseableCounter parent, AccumulatedKey counter) { + this.debug = debug; + this.parent = parent; + this.start = getCounterValue(); + this.counter = counter; + } + + @Override + public DebugContext getDebug() { + return debug; + } + + /** + * A hook for subclasses. Lets them perform custom operations with the value since the last + * invocation of {@link CloseableCounter#close()} of this accumulated + * {@link CloseableCounter#counter}. + * + * @param difference since the last invocation of this counter flat + */ + protected void interceptDifferenceAccm(long difference) { + // hook for subclasses + } + + /** + * A hook for subclasses. Lets them perform custom operations with the value since the last + * invocation of {@link CloseableCounter#close()} of this flat {@link CloseableCounter#counter}. + * + * @param difference since the last invocation of this counter flat + */ + protected void interceptDifferenceFlat(long difference) { + // hook for subclasses + } + + @Override + public void close() { + long end = getCounterValue(); + long difference = end - start; + if (parent != null) { + if (!counter.getName().equals(parent.counter.getName())) { + parent.nestedAmountToSubtract += difference; + // Look for our counter in an outer scope and fix up + // the adjustment to the flat count + CloseableCounter ancestor = parent.parent; + while (ancestor != null) { + if (ancestor.counter.getName().equals(counter.getName())) { + ancestor.nestedAmountToSubtract -= difference; + break; + } + ancestor = ancestor.parent; + } + } + } + long flatAmount = difference - nestedAmountToSubtract; + counter.addToCurrentValue(debug, difference); + counter.flat.addToCurrentValue(debug, flatAmount); + interceptDifferenceAccm(difference); + interceptDifferenceFlat(flatAmount); + } + + abstract long getCounterValue(); +}