Mercurial > hg > truffle
diff graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ExceptionHandler.java @ 21556:48c1ebd24120
renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 27 May 2015 00:36:16 +0200 |
parents | graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/ExceptionHandler.java@1cde96b96673 |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ExceptionHandler.java Wed May 27 00:36:16 2015 +0200 @@ -0,0 +1,121 @@ +/* + * 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; + } +}