Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/PrintStreamOption.java @ 21556:48c1ebd24120
renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 27 May 2015 00:36:16 +0200 |
parents | b1530a6cce8c |
children | f5b549811bac |
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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.jvmci.hotspot; |
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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.jvmci.options.*; |
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29 |
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30 |
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31 /** |
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32 * An option that encapsulates and configures a print stream. |
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33 */ |
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34 public class PrintStreamOption extends OptionValue<String> { |
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35 |
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36 public PrintStreamOption() { |
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37 super(null); |
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38 } |
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39 |
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40 /** |
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41 * The print stream to which output will be written. |
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42 * |
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43 * Declared {@code volatile} to enable safe use of double-checked locking in |
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44 * {@link #getStream(CompilerToVM)} and {@link #setValue(Object)}. |
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45 */ |
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46 private volatile PrintStream ps; |
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47 |
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48 /** |
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49 * Replace any instance of %p with a an identifying name. Try to get it from the RuntimeMXBean |
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50 * name. |
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51 * |
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52 * @return the name of the file to log to |
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53 */ |
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54 private String getFilename() { |
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55 String name = getValue(); |
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56 if (name.contains("%p")) { |
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57 String runtimeName = ManagementFactory.getRuntimeMXBean().getName(); |
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58 try { |
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59 int index = runtimeName.indexOf('@'); |
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60 if (index != -1) { |
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61 long pid = Long.parseLong(runtimeName.substring(0, index)); |
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62 runtimeName = Long.toString(pid); |
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63 } |
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64 name = name.replaceAll("%p", runtimeName); |
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65 } catch (NumberFormatException e) { |
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66 |
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67 } |
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68 } |
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69 return name; |
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70 } |
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71 |
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72 /** |
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73 * Gets the print stream configured by this option. If no file is configured, the print stream |
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74 * will output to {@link CompilerToVM#writeDebugOutput(byte[], int, int)}. |
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75 */ |
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76 public PrintStream getStream(final CompilerToVM compilerToVM) { |
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77 if (ps == null) { |
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78 if (getValue() != null) { |
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79 synchronized (this) { |
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80 if (ps == null) { |
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81 try { |
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82 final boolean enableAutoflush = true; |
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83 ps = new PrintStream(new FileOutputStream(getFilename()), enableAutoflush); |
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84 /* Add the JVM and Java arguments to the log file to help identity it. */ |
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85 String inputArguments = String.join(" ", ManagementFactory.getRuntimeMXBean().getInputArguments()); |
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86 ps.println("VM Arguments: " + inputArguments); |
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87 String cmd = System.getProperty("sun.java.command"); |
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88 if (cmd != null) { |
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89 ps.println("sun.java.command=" + cmd); |
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90 } |
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91 } catch (FileNotFoundException e) { |
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92 throw new RuntimeException("couldn't open file: " + getValue(), e); |
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93 } |
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94 } |
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95 } |
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96 } else { |
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97 OutputStream ttyOut = new OutputStream() { |
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98 @Override |
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99 public void write(byte[] b, int off, int len) throws IOException { |
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100 if (b == null) { |
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101 throw new NullPointerException(); |
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102 } else if (off < 0 || off > b.length || len < 0 || (off + len) > b.length || (off + len) < 0) { |
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103 throw new IndexOutOfBoundsException(); |
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104 } else if (len == 0) { |
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105 return; |
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106 } |
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107 compilerToVM.writeDebugOutput(b, off, len); |
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108 } |
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109 |
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110 @Override |
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111 public void write(int b) throws IOException { |
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112 write(new byte[]{(byte) b}, 0, 1); |
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113 } |
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114 |
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115 @Override |
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116 public void flush() throws IOException { |
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117 compilerToVM.flushDebugOutput(); |
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118 } |
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119 }; |
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120 ps = new PrintStream(ttyOut); |
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121 } |
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122 } |
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123 return ps; |
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124 } |
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125 |
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126 @Override |
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127 public void setValue(Object v) { |
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128 if (ps != null) { |
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129 synchronized (this) { |
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130 if (ps != null) { |
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131 ps.close(); |
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132 ps = null; |
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133 } |
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134 } |
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135 } |
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136 super.setValue(v); |
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137 } |
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138 } |