| /* |
| * Copyright (c) 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 jdk.vm.ci.meta; |
| |
| /** |
| * Maps bytecode indexes to source line numbers. |
| * |
| * @see "https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.12" |
| */ |
| public class LineNumberTable { |
| |
| private final int[] lineNumbers; |
| private final int[] bcis; |
| |
| /** |
| * |
| * @param lineNumbers an array of source line numbers. This array is now owned by this object |
| * and should not be mutated by the caller. |
| * @param bcis an array of bytecode indexes the same length at {@code lineNumbers} whose entries |
| * are sorted in ascending order. This array is now owned by this object and must not |
| * be mutated by the caller. |
| */ |
| @SuppressFBWarnings(value = "EI_EXPOSE_REP2", justification = "caller transfers ownership of `lineNumbers` and `bcis`") |
| public LineNumberTable(int[] lineNumbers, int[] bcis) { |
| assert bcis.length == lineNumbers.length; |
| this.lineNumbers = lineNumbers; |
| this.bcis = bcis; |
| } |
| |
| /** |
| * Gets a source line number for bytecode index {@code atBci}. |
| */ |
| public int getLineNumber(int atBci) { |
| for (int i = 0; i < this.bcis.length - 1; i++) { |
| if (this.bcis[i] <= atBci && atBci < this.bcis[i + 1]) { |
| return lineNumbers[i]; |
| } |
| } |
| return lineNumbers[lineNumbers.length - 1]; |
| } |
| |
| /** |
| * Gets a copy of the array of line numbers that was passed to this object's constructor. |
| */ |
| public int[] getLineNumbers() { |
| return lineNumbers.clone(); |
| } |
| |
| /** |
| * Gets a copy of the array of bytecode indexes that was passed to this object's constructor. |
| */ |
| public int[] getBcis() { |
| return bcis.clone(); |
| } |
| } |