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annotate graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/jvmci/PrintStreamOption.java @ 21531:01319414783b

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added extension point for post Option parsing actions and used it to remove another JVMCI to non-JVMCI dependency (JBS:GRAAL-53)
author Doug Simon <doug.simon@oracle.com>
date Sun, 24 May 2015 13:11:53 +0200
parents de0cf192779c
children
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76f40e11c820 refactored HotSpotGraalRuntime.LogFileOption to PrintStreamOption to workaround a javac bug as well as to clarify its design
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.hotspot.jvmci;
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24
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25 import java.io.*;
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26 import java.lang.management.*;
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27
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28 import com.oracle.graal.options.*;
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29
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30 /**
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31 * An option that encapsulates and configures a print stream.
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32 */
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33 public class PrintStreamOption extends OptionValue<String> {
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34
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35 public PrintStreamOption() {
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36 super(null);
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37 }
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38
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39 /**
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40 * The print stream to which output will be written.
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41 *
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42 * Declared {@code volatile} to enable safe use of double-checked locking in
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43 * {@link #getStream(CompilerToVM)} and {@link #setValue(Object)}.
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44 */
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45 private volatile PrintStream ps;
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46
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47 /**
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48 * Replace any instance of %p with a an identifying name. Try to get it from the RuntimeMXBean
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49 * name.
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50 *
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51 * @return the name of the file to log to
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52 */
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53 private String getFilename() {
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54 String name = getValue();
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55 if (name.contains("%p")) {
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56 String runtimeName = ManagementFactory.getRuntimeMXBean().getName();
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57 try {
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58 int index = runtimeName.indexOf('@');
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59 if (index != -1) {
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60 long pid = Long.parseLong(runtimeName.substring(0, index));
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61 runtimeName = Long.toString(pid);
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62 }
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63 name = name.replaceAll("%p", runtimeName);
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64 } catch (NumberFormatException e) {
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65
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66 }
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67 }
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68 return name;
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69 }
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70
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71 /**
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72 * Gets the print stream configured by this option. If no file is configured, the print stream
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73 * will output to {@link CompilerToVM#writeDebugOutput(byte[], int, int)}.
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74 */
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75 public PrintStream getStream(final CompilerToVM compilerToVM) {
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76 if (ps == null) {
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77 if (getValue() != null) {
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78 synchronized (this) {
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79 if (ps == null) {
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80 try {
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81 final boolean enableAutoflush = true;
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82 ps = new PrintStream(new FileOutputStream(getFilename()), enableAutoflush);
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83 /* Add the JVM and Java arguments to the log file to help identity it. */
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84 String inputArguments = String.join(" ", ManagementFactory.getRuntimeMXBean().getInputArguments());
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85 ps.println("VM Arguments: " + inputArguments);
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86 String cmd = System.getProperty("sun.java.command");
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87 if (cmd != null) {
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88 ps.println("sun.java.command=" + cmd);
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89 }
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90 } catch (FileNotFoundException e) {
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91 throw new RuntimeException("couldn't open file: " + getValue(), e);
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92 }
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93 }
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94 }
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95 } else {
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96 OutputStream ttyOut = new OutputStream() {
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97 @Override
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98 public void write(byte[] b, int off, int len) throws IOException {
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99 if (b == null) {
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100 throw new NullPointerException();
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101 } else if (off < 0 || off > b.length || len < 0 || (off + len) > b.length || (off + len) < 0) {
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102 throw new IndexOutOfBoundsException();
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103 } else if (len == 0) {
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104 return;
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105 }
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106 compilerToVM.writeDebugOutput(b, off, len);
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107 }
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108
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109 @Override
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110 public void write(int b) throws IOException {
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111 write(new byte[]{(byte) b}, 0, 1);
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112 }
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113
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114 @Override
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115 public void flush() throws IOException {
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116 compilerToVM.flushDebugOutput();
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117 }
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118 };
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119 ps = new PrintStream(ttyOut);
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120 }
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121 }
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122 return ps;
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123 }
76f40e11c820 refactored HotSpotGraalRuntime.LogFileOption to PrintStreamOption to workaround a javac bug as well as to clarify its design
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124
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125 @Override
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126 public void setValue(Object v) {
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127 if (ps != null) {
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128 synchronized (this) {
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129 if (ps != null) {
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130 ps.close();
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131 ps = null;
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132 }
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133 }
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134 }
76f40e11c820 refactored HotSpotGraalRuntime.LogFileOption to PrintStreamOption to workaround a javac bug as well as to clarify its design
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135 super.setValue(v);
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136 }
18163
c88ab4f1f04a re-enabled Checkstyle with the release of 6.0 that supports Java 8; fixed existing Checkstyle warnings
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137 }