Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.debug/src/com/oracle/jvmci/debug/internal/MemUseTrackerImpl.java @ 21709:3c17c0c41a6b
moved com.oracle.asm.**.test to JVMCI namespace (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 03 Jun 2015 18:33:23 +0200 |
parents | b1530a6cce8c |
children |
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/* * 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); } } }