1 /* 2 * Copyright (c) 2017, 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 24 25 package org.graalvm.compiler.debug; 26 27 import java.io.File; 28 import java.io.FileOutputStream; 29 import java.io.IOException; 30 import java.nio.file.FileVisitResult; 31 import java.nio.file.Files; 32 import java.nio.file.Path; 33 import java.nio.file.Paths; 34 import java.nio.file.SimpleFileVisitor; 35 import java.nio.file.attribute.BasicFileAttributes; 36 import java.util.ArrayList; 37 import java.util.Collections; 38 import java.util.List; 39 import java.util.zip.Deflater; 40 import java.util.zip.ZipEntry; 41 import java.util.zip.ZipOutputStream; 42 43 import org.graalvm.compiler.options.OptionValues; 44 import org.graalvm.compiler.serviceprovider.GraalServices; 45 46 /** 47 * Manages a directory into which diagnostics such crash reports and dumps should be written. The 48 * directory is archived and deleted when {@link #close()} is called. 49 */ 50 public class DiagnosticsOutputDirectory { 51 52 /** 53 * Use an illegal file name to denote that {@link #close()} has been called. 54 */ 55 private static final String CLOSED = "\u0000"; 56 57 public DiagnosticsOutputDirectory(OptionValues options) { 58 this.options = options; 59 } 60 61 private final OptionValues options; 62 63 private String path; 64 65 /** 66 * Gets the path to the output directory managed by this object, creating if it doesn't exist 67 * and has not been deleted. 68 * 69 * @returns the directory or {@code null} if the could not be created or has been deleted 70 */ 71 public String getPath() { 72 return getPath(true); 73 } 74 75 private synchronized String getPath(boolean createIfNull) { 76 if (path == null && createIfNull) { 77 path = createPath(); 78 File dir = new File(path).getAbsoluteFile(); 79 if (!dir.exists()) { 80 dir.mkdirs(); 81 if (!dir.exists()) { 82 TTY.println("Warning: could not create Graal diagnostic directory " + dir); 83 return null; 84 } 85 } 86 } 87 if (CLOSED.equals(path)) { 88 TTY.println("Warning: Graal diagnostic directory already closed"); 89 } 90 return path; 91 } 92 93 /** 94 * Gets the path of the directory to be created. 95 * 96 * Subclasses can override this to determine how the path name is created. 97 * 98 * @return the path to be created 99 */ 100 protected String createPath() { 101 Path baseDir; 102 try { 103 baseDir = DebugOptions.getDumpDirectory(options); 104 } catch (IOException e) { 105 // Default to current directory if there was a problem creating the 106 // directory specified by the DumpPath option. 107 baseDir = Paths.get("."); 108 } 109 return baseDir.resolve("graal_diagnostics_" + GraalServices.getExecutionID()).toAbsolutePath().toString(); 110 } 111 112 /** 113 * Archives and deletes this directory if it exists. 114 */ 115 public void close() { 116 archiveAndDelete(); 117 } 118 119 /** 120 * Archives and deletes the {@linkplain #getPath() output directory} if it exists. 121 */ 122 private synchronized void archiveAndDelete() { 123 String outDir = getPath(false); 124 if (outDir != null) { 125 // Notify other threads calling getPath() that the directory is deleted. 126 // This attempts to mitigate other threads writing to the directory 127 // while it is being archived and deleted. 128 path = CLOSED; 129 130 Path dir = Paths.get(outDir); 131 if (dir.toFile().exists()) { 132 File zip = new File(outDir + ".zip").getAbsoluteFile(); 133 List<Path> toDelete = new ArrayList<>(); 134 try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zip))) { 135 zos.setLevel(Deflater.BEST_COMPRESSION); 136 Files.walkFileTree(dir, Collections.emptySet(), Integer.MAX_VALUE, new SimpleFileVisitor<Path>() { 137 @Override 138 public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException { 139 if (attrs.isRegularFile()) { 140 String name = dir.relativize(file).toString(); 141 ZipEntry ze = new ZipEntry(name); 142 zos.putNextEntry(ze); 143 Files.copy(file, zos); 144 zos.closeEntry(); 145 } 146 toDelete.add(file); 147 return FileVisitResult.CONTINUE; 148 } 149 150 @Override 151 public FileVisitResult postVisitDirectory(Path d, IOException exc) throws IOException { 152 toDelete.add(d); 153 return FileVisitResult.CONTINUE; 154 } 155 }); 156 // Keep this in sync with the catch_files in common.hocon 157 TTY.println("Graal diagnostic output saved in %s", zip); 158 } catch (IOException e) { 159 TTY.printf("IO error archiving %s:%n%s. The directory will not be deleted and must be " + 160 "manually removed once the VM exits.%n", dir, e); 161 toDelete.clear(); 162 } 163 if (!toDelete.isEmpty()) { 164 IOException lastDeletionError = null; 165 for (Path p : toDelete) { 166 try { 167 Files.delete(p); 168 } catch (IOException e) { 169 lastDeletionError = e; 170 } 171 } 172 if (lastDeletionError != null) { 173 TTY.printf("IO error deleting %s:%n%s. This is most likely due to a compilation on " + 174 "another thread holding a handle to a file within this directory. " + 175 "Please delete the directory manually once the VM exits.%n", dir, lastDeletionError); 176 } 177 } 178 } 179 } 180 } 181 }