hotspot/agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeWideable.java
author never
Thu, 21 Jul 2011 08:38:25 -0700
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7012081: JSR 292: SA-JDI can't read MH/MT/Indy ConstantPool entries Reviewed-by: kvn, twisti, jrose
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/*
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 * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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package sun.jvm.hotspot.interpreter;
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import sun.jvm.hotspot.oops.*;
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public abstract class BytecodeWideable extends Bytecode {
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  BytecodeWideable(Method method, int bci) {
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    super(method, bci);
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  }
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  public boolean isWide() {
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    int prevBci = bci() - 1;
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    return (prevBci > -1 && method.getBytecodeOrBPAt(prevBci) == Bytecodes._wide);
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  }
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  // the local variable index
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  public int getLocalVarIndex() {
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    return (isWide()) ? getIndexU2(code(), true) : getIndexU1();
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  }
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}