Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ExceptionHandler.java @ 21591:6c5327245831
LinearScan: fix intervals context.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Fri, 29 May 2015 10:59:03 +0200 |
parents | 48c1ebd24120 |
children |
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/* * Copyright (c) 2009, 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.meta; import java.util.*; /** * Represents an exception handler within the bytecodes. */ public final class ExceptionHandler { private final int startBCI; private final int endBCI; private final int handlerBCI; private final int catchTypeCPI; private final JavaType catchType; /** * Creates a new exception handler with the specified ranges. * * @param startBCI the start index of the protected range * @param endBCI the end index of the protected range * @param catchBCI the index of the handler * @param catchTypeCPI the index of the throwable class in the constant pool * @param catchType the type caught by this exception handler */ public ExceptionHandler(int startBCI, int endBCI, int catchBCI, int catchTypeCPI, JavaType catchType) { this.startBCI = startBCI; this.endBCI = endBCI; this.handlerBCI = catchBCI; this.catchTypeCPI = catchTypeCPI; this.catchType = catchType; } /** * Returns the start bytecode index of the protected range of this handler. */ public int getStartBCI() { return startBCI; } /** * Returns the end bytecode index of the protected range of this handler. */ public int getEndBCI() { return endBCI; } /** * Returns the bytecode index of the handler block of this handler. */ public int getHandlerBCI() { return handlerBCI; } /** * Returns the index into the constant pool representing the type of exception caught by this * handler. */ public int catchTypeCPI() { return catchTypeCPI; } /** * Checks whether this handler catches all exceptions. * * @return {@code true} if this handler catches all exceptions */ public boolean isCatchAll() { return catchTypeCPI == 0; } /** * Returns the type of exception caught by this exception handler. */ public JavaType getCatchType() { return catchType; } @Override public boolean equals(Object obj) { if (!(obj instanceof ExceptionHandler)) { return false; } ExceptionHandler that = (ExceptionHandler) obj; if (this.startBCI != that.startBCI || this.endBCI != that.endBCI || this.handlerBCI != that.handlerBCI || this.catchTypeCPI != that.catchTypeCPI) { return false; } return Objects.equals(this.catchType, that.catchType); } @Override public String toString() { return "ExceptionHandler<startBCI=" + startBCI + ", endBCI=" + endBCI + ", handlerBCI=" + handlerBCI + ", catchTypeCPI=" + catchTypeCPI + ", catchType=" + catchType + ">"; } @Override public int hashCode() { return catchTypeCPI ^ endBCI ^ handlerBCI; } }