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.concurrent.atomic.AtomicInteger; 28 import java.util.concurrent.atomic.AtomicLong; 29 30 public class UniquePathUtilities { 31 32 private static final AtomicLong globalTimeStamp = new AtomicLong(); 33 /** 34 * This generates a per thread persistent id to aid mapping related dump files with each other. 35 */ 36 private static final ThreadLocal<Integer> threadDumpId = new ThreadLocal<>(); 37 private static final AtomicInteger dumpId = new AtomicInteger(); 38 39 private static int getThreadDumpId() { 40 Integer id = threadDumpId.get(); 41 if (id == null) { 42 id = dumpId.incrementAndGet(); 43 threadDumpId.set(id); 44 } 45 return id; 46 } 47 48 private static String formatExtension(String ext) { 49 if (ext == null || ext.length() == 0) { 50 return ""; 51 } 52 return "." + ext; 53 } 54 55 public static long getGlobalTimeStamp() { 56 if (globalTimeStamp.get() == 0) { 57 globalTimeStamp.compareAndSet(0, System.currentTimeMillis()); 58 } 59 return globalTimeStamp.get(); 60 } 61 62 /** 63 * Generate a {@link Path} using the format "%s-%d_%d%s" with the {@link OptionValue#getValue() 64 * base filename}, a {@link #globalTimeStamp global timestamp}, {@link #getThreadDumpId a per 65 * thread unique id} and an optional {@code extension}. 66 * 67 * @return the output file path or null if the flag is null 68 */ 69 public static Path getPath(OptionValue<String> option, OptionValue<String> defaultDirectory, String extension) { 70 return getPath(option, defaultDirectory, extension, true); 71 } 72 73 /** 74 * Generate a {@link Path} using the format "%s-%d_%s" with the {@link OptionValue#getValue() 75 * base filename}, a {@link #globalTimeStamp global timestamp} and an optional {@code extension} 76 * . 77 * 78 * @return the output file path or null if the flag is null 79 */ 80 public static Path getPathGlobal(OptionValue<String> option, OptionValue<String> defaultDirectory, String extension) { 81 return getPath(option, defaultDirectory, extension, false); 82 } 83 84 private static Path getPath(OptionValue<String> option, OptionValue<String> defaultDirectory, String extension, boolean includeThreadId) { 85 if (option.getValue() == null) { 86 return null; 87 } 88 final String name = includeThreadId 89 ? String.format("%s-%d_%d%s", option.getValue(), getGlobalTimeStamp(), getThreadDumpId(), formatExtension(extension)) 90 : String.format("%s-%d%s", option.getValue(), getGlobalTimeStamp(), formatExtension(extension)); 91 Path result = Paths.get(name); 92 if (result.isAbsolute() || defaultDirectory == null) { 93 return result; 94 } 95 return Paths.get(defaultDirectory.getValue(), name); 96 } 97 98 }