Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/compiler/OopMapStream.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 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 sun.jvm.hotspot.compiler; import sun.jvm.hotspot.code.*; public class OopMapStream { private CompressedReadStream stream; private OopMap oopMap; private int mask; private int size; private int position; private OopMapValue omv; private boolean omvValid; public OopMapStream(OopMap oopMap) { this(oopMap, (OopMapValue.OopTypes[]) null); } public OopMapStream(OopMap oopMap, OopMapValue.OopTypes type) { this(oopMap, (OopMapValue.OopTypes[]) null); mask = type.getValue(); } public OopMapStream(OopMap oopMap, OopMapValue.OopTypes[] types) { if (oopMap.getOMVData() == null) { stream = new CompressedReadStream(oopMap.getWriteStream().getBuffer()); } else { stream = new CompressedReadStream(oopMap.getOMVData()); } mask = computeMask(types); size = (int) oopMap.getOMVCount(); position = 0; omv = new OopMapValue(); omvValid = false; } public boolean isDone() { if (!omvValid) { findNext(); } return !omvValid; } public void next() { findNext(); } public OopMapValue getCurrent() { return omv; } //-------------------------------------------------------------------------------- // Internals only below this point // private int computeMask(OopMapValue.OopTypes[] types) { mask = 0; if (types != null) { for (int i = 0; i < types.length; i++) { mask |= types[i].getValue(); } } return mask; } private void findNext() { while (position++ < size) { omv.readFrom(stream); if ((omv.getType().getValue() & mask) > 0) { omvValid = true; return; } } omvValid = false; } }