Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.meta/src/jdk/vm/ci/meta/LineNumberTable.java @ 23985:05922ce51c5e
Restore extra level of weakness in the ResolvedJavaType cache
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Mon, 23 Jan 2017 15:50:05 -0800 |
parents | 9bc5db6cdbb0 |
children |
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/* * 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(); } }