| /* |
| * 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 jdk.vm.ci.meta; |
| |
| import java.util.Objects; |
| |
| /** |
| * 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; |
| } |
| } |