1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package org.graalvm.compiler.options; 24 25 import java.nio.file.Path; 26 import java.nio.file.Paths; 27 import java.util.HashMap; 28 import java.util.concurrent.atomic.AtomicInteger; 29 import java.util.concurrent.atomic.AtomicLong; 30 31 public class UniquePathUtilities { 32 33 private static final AtomicLong globalTimeStamp = new AtomicLong(); 34 /** 35 * This generates a per thread persistent id to aid mapping related dump files with each other. 36 */ 37 private static final ThreadLocal<PerThreadSequence> threadDumpId = new ThreadLocal<>(); 38 private static final AtomicInteger dumpId = new AtomicInteger(); 39 40 static class PerThreadSequence { 41 final int threadID; 42 HashMap<String, Integer> sequences = new HashMap<>(2); 43 44 PerThreadSequence(int threadID) { 45 this.threadID = threadID; 46 } 47 48 String generateID(String extension) { 49 Integer box = sequences.get(extension); 50 if (box == null) { 51 sequences.put(extension, 1); 52 return Integer.toString(threadID); 53 } else { 54 sequences.put(extension, box + 1); 55 return Integer.toString(threadID) + '-' + box; 56 } 57 } 58 } 59 60 private static String getThreadDumpId(String extension) { 61 PerThreadSequence id = threadDumpId.get(); 62 if (id == null) { 63 id = new PerThreadSequence(dumpId.incrementAndGet()); 64 threadDumpId.set(id); 65 } 66 return id.generateID(extension); 67 } 68 69 private static String formatExtension(String ext) { 70 if (ext == null || ext.length() == 0) { 71 return ""; 72 } 73 return "." + ext; 74 } 75 76 public static long getGlobalTimeStamp() { 77 if (globalTimeStamp.get() == 0) { 78 globalTimeStamp.compareAndSet(0, System.currentTimeMillis()); 79 } 80 return globalTimeStamp.get(); 81 } 82 83 /** 84 * Generates a {@link Path} using the format "%s-%d_%d%s" with the {@link OptionKey#getValue 85 * base filename}, a {@link #globalTimeStamp global timestamp} , {@link #getThreadDumpId a per 86 * thread unique id} and an optional {@code extension}. 87 * 88 * @return the output file path or null if the flag is null 89 */ 90 public static Path getPath(OptionValues options, OptionKey<String> option, OptionKey<String> defaultDirectory, String extension) { 91 return getPath(options, option, defaultDirectory, extension, true); 92 } 93 94 /** 95 * Generate a {@link Path} using the format "%s-%d_%s" with the {@link OptionKey#getValue base 96 * filename}, a {@link #globalTimeStamp global timestamp} and an optional {@code extension} . 97 * 98 * @return the output file path or null if the flag is null 99 */ 100 public static Path getPathGlobal(OptionValues options, OptionKey<String> option, OptionKey<String> defaultDirectory, String extension) { 101 return getPath(options, option, defaultDirectory, extension, false); 102 } 103 104 private static Path getPath(OptionValues options, OptionKey<String> option, OptionKey<String> defaultDirectory, String extension, boolean includeThreadId) { 105 if (option.getValue(options) == null) { 106 return null; 107 } 108 String ext = formatExtension(extension); 109 final String name = includeThreadId 110 ? String.format("%s-%d_%s%s", option.getValue(options), getGlobalTimeStamp(), getThreadDumpId(ext), ext) 111 : String.format("%s-%d%s", option.getValue(options), getGlobalTimeStamp(), ext); 112 Path result = Paths.get(name); 113 if (result.isAbsolute() || defaultDirectory == null) { 114 return result; 115 } 116 return Paths.get(defaultDirectory.getValue(options), name).normalize(); 117 } 118 }