Mercurial > hg > truffle
diff graal/com.oracle.jvmci.debug/src/com/oracle/jvmci/debug/internal/MemUseTrackerImpl.java @ 21554:b1530a6cce8c
renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Tue, 26 May 2015 23:21:15 +0200 |
parents | graal/com.oracle.graal.debug/src/com/oracle/graal/debug/internal/MemUseTrackerImpl.java@e7e868a42b3f |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.debug/src/com/oracle/jvmci/debug/internal/MemUseTrackerImpl.java Tue May 26 23:21:15 2015 +0200 @@ -0,0 +1,98 @@ +/* + * Copyright (c) 2012, 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 com.oracle.jvmci.debug.internal; + +import static com.oracle.jvmci.debug.DebugCloseable.*; +import static java.lang.Thread.*; + +import java.lang.management.*; + +import com.oracle.jvmci.debug.*; +import com.sun.management.ThreadMXBean; + +public final class MemUseTrackerImpl extends AccumulatedDebugValue implements DebugMemUseTracker { + + private static final ThreadMXBean threadMXBean = (ThreadMXBean) ManagementFactory.getThreadMXBean(); + + /** + * The amount of memory allocated by {@link ThreadMXBean#getThreadAllocatedBytes(long)} itself. + */ + private static final long threadMXBeanOverhead = -getCurrentThreadAllocatedBytes() + getCurrentThreadAllocatedBytes(); + + public static long getCurrentThreadAllocatedBytes() { + return threadMXBean.getThreadAllocatedBytes(currentThread().getId()) - threadMXBeanOverhead; + } + + /** + * Records the most recent active tracker. + */ + private static final ThreadLocal<CloseableCounterImpl> currentTracker = new ThreadLocal<>(); + + public MemUseTrackerImpl(String name, boolean conditional) { + super(name, conditional, new DebugValue(name + "_Flat", conditional) { + + @Override + public String toString(long value) { + return valueToString(value); + } + }); + } + + @Override + public DebugCloseable start() { + if (!isConditional() || Debug.isMemUseTrackingEnabled()) { + MemUseCloseableCounterImpl result = new MemUseCloseableCounterImpl(this); + currentTracker.set(result); + return result; + } else { + return VOID_CLOSEABLE; + } + } + + public static String valueToString(long value) { + return String.format("%d bytes", value); + } + + @Override + public String toString(long value) { + return valueToString(value); + } + + private static final class MemUseCloseableCounterImpl extends CloseableCounterImpl implements DebugCloseable { + + private MemUseCloseableCounterImpl(AccumulatedDebugValue counter) { + super(currentTracker.get(), counter); + } + + @Override + long getCounterValue() { + return getCurrentThreadAllocatedBytes(); + } + + @Override + public void close() { + super.close(); + currentTracker.set(parent); + } + } +}