Mercurial > hg > graal-compiler
view graal/com.oracle.max.cri/src/com/oracle/max/cri/ci/CiCodePos.java @ 4461:539fca6a3b98
Merge
author | Christian Haeubl <christian.haeubl@oracle.com> |
---|---|
date | Thu, 02 Feb 2012 16:07:52 -0800 |
parents | aaac4894175c |
children | 51111665eda6 |
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/* * Copyright (c) 2009, 2011, 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.max.cri.ci; import java.io.*; import com.oracle.max.cri.ri.*; /** * Represents a code position, that is, a chain of inlined methods with bytecode * locations, that is communicated from the compiler to the runtime system. A code position * can be used by the runtime system to reconstruct a source-level stack trace * for exceptions and to create {@linkplain CiFrame frames} for deoptimization. */ public class CiCodePos implements Serializable { /** * */ private static final long serialVersionUID = 8633885274526033515L; /** * The position where this position has been called, {@code null} if none. */ public final CiCodePos caller; /** * The runtime interface method for this position. */ public final RiResolvedMethod method; /** * The location within the method, as a bytecode index. The constant * {@code -1} may be used to indicate the location is unknown, for example * within code synthesized by the compiler. */ public final int bci; /** * Constructs a new object representing a given parent/caller, a given method, and a given BCI. * * @param caller the parent position * @param method the method * @param bci a BCI within the method */ public CiCodePos(CiCodePos caller, RiResolvedMethod method, int bci) { assert method != null; this.caller = caller; this.method = method; this.bci = bci; } /** * Converts this code position to a string representation. * @return a string representation of this code position */ @Override public String toString() { return CiUtil.append(new StringBuilder(100), this).toString(); } /** * Deep equality test. */ @Override public boolean equals(Object obj) { if (obj == this) { return true; } if (obj instanceof CiCodePos) { CiCodePos other = (CiCodePos) obj; if (other.method.equals(method) && other.bci == bci) { if (caller == null) { return other.caller == null; } return caller.equals(other.caller); } } return false; } @Override public int hashCode() { return bci; } }