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96 lines
3.2 KiB
96 lines
3.2 KiB
/* CompleteSynchronized Copyright (C) 1998-2002 Jochen Hoenicke.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; see the file COPYING.LESSER. If not, write to
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* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id$
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*/
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package net.sf.jode.flow;
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import net.sf.jode.GlobalOptions;
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import net.sf.jode.expr.*;
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public class CompleteSynchronized {
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/**
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* This combines the monitorenter into a synchronized statement.
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*/
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public static boolean enter(SynchronizedBlock synBlock,
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StructuredBlock last) {
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if (!(last.outer instanceof SequentialBlock))
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return false;
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/* If the program is well formed, the following succeed */
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SequentialBlock sequBlock = (SequentialBlock) synBlock.outer;
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if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
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return false;
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Expression monenter =
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((InstructionBlock) sequBlock.subBlocks[0]).getInstruction();
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if (!(monenter instanceof MonitorEnterOperator))
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return false;
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Expression loadOp =
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((MonitorEnterOperator)monenter).getSubExpressions()[0];
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if (!(loadOp instanceof LocalLoadOperator)
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|| (((LocalLoadOperator) loadOp).getLocalInfo()
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!= synBlock.local.getLocalInfo()))
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return false;
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if (GlobalOptions.verboseLevel > 0)
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GlobalOptions.err.print('s');
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synBlock.isEntered = true;
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synBlock.moveDefinitions(last.outer,last);
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last.replace(last.outer);
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return true;
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}
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/**
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* This combines the initial expression describing the object
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* into a synchronized statement.
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*/
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public static boolean combineObject(SynchronizedBlock synBlock,
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StructuredBlock last) {
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/* Is there another expression? */
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if (!(last.outer instanceof SequentialBlock))
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return false;
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SequentialBlock sequBlock = (SequentialBlock) last.outer;
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if (!(sequBlock.subBlocks[0] instanceof InstructionBlock))
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return false;
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InstructionBlock ib = (InstructionBlock) sequBlock.subBlocks[0];
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if (!(ib.getInstruction() instanceof StoreInstruction))
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return false;
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StoreInstruction assign = (StoreInstruction) ib.getInstruction();
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if (!(assign.getLValue() instanceof LocalStoreOperator))
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return false;
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LocalStoreOperator lvalue = (LocalStoreOperator) assign.getLValue();
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if (lvalue.getLocalInfo() != synBlock.local.getLocalInfo()
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|| assign.getSubExpressions()[1] == null)
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return false;
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synBlock.object = assign.getSubExpressions()[1];
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synBlock.moveDefinitions(last.outer,last);
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last.replace(last.outer);
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return true;
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}
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}
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