1 /* |
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2 * Copyright (c) 2005, 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. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.management; |
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27 |
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28 import java.io.IOException; |
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29 import java.util.ArrayList; |
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30 import java.util.List; |
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31 import javax.management.ObjectName; |
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32 |
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33 import com.sun.management.HotSpotDiagnosticMXBean; |
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34 import com.sun.management.VMOption; |
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35 |
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36 /** |
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37 * Implementation of the diagnostic MBean for Hotspot VM. |
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38 */ |
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39 public class HotSpotDiagnostic implements HotSpotDiagnosticMXBean { |
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40 public HotSpotDiagnostic() { |
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41 } |
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42 |
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43 @Override |
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44 public void dumpHeap(String outputFile, boolean live) throws IOException { |
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45 SecurityManager security = System.getSecurityManager(); |
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46 if (security != null) { |
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47 security.checkWrite(outputFile); |
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48 Util.checkControlAccess(); |
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49 } |
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50 |
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51 dumpHeap0(outputFile, live); |
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52 } |
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53 |
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54 private native void dumpHeap0(String outputFile, boolean live) throws IOException; |
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55 |
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56 @Override |
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57 public List<VMOption> getDiagnosticOptions() { |
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58 List<Flag> allFlags = Flag.getAllFlags(); |
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59 List<VMOption> result = new ArrayList<>(); |
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60 for (Flag flag : allFlags) { |
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61 if (flag.isWriteable() && flag.isExternal()) { |
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62 result.add(flag.getVMOption()); |
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63 } |
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64 } |
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65 return result; |
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66 } |
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67 |
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68 @Override |
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69 public VMOption getVMOption(String name) { |
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70 if (name == null) { |
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71 throw new NullPointerException("name cannot be null"); |
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72 } |
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73 |
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74 Flag f = Flag.getFlag(name); |
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75 if (f == null) { |
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76 throw new IllegalArgumentException("VM option \"" + |
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77 name + "\" does not exist"); |
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78 } |
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79 return f.getVMOption(); |
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80 } |
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81 |
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82 @Override |
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83 public void setVMOption(String name, String value) { |
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84 if (name == null) { |
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85 throw new NullPointerException("name cannot be null"); |
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86 } |
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87 if (value == null) { |
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88 throw new NullPointerException("value cannot be null"); |
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89 } |
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90 |
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91 Util.checkControlAccess(); |
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92 Flag flag = Flag.getFlag(name); |
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93 if (flag == null) { |
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94 throw new IllegalArgumentException("VM option \"" + |
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95 name + "\" does not exist"); |
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96 } |
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97 if (!flag.isWriteable()){ |
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98 throw new IllegalArgumentException("VM Option \"" + |
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99 name + "\" is not writeable"); |
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100 } |
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101 |
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102 // Check the type of the value |
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103 Object v = flag.getValue(); |
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104 if (v instanceof Long) { |
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105 try { |
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106 long l = Long.parseLong(value); |
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107 Flag.setLongValue(name, l); |
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108 } catch (NumberFormatException e) { |
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109 throw new IllegalArgumentException("Invalid value:" + |
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110 " VM Option \"" + name + "\"" + |
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111 " expects numeric value", e); |
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112 } |
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113 } else if (v instanceof Double) { |
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114 try { |
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115 double d = Double.parseDouble(value); |
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116 Flag.setDoubleValue(name, d); |
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117 } catch (NumberFormatException e) { |
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118 throw new IllegalArgumentException("Invalid value:" + |
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119 " VM Option \"" + name + "\"" + |
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120 " expects numeric value", e); |
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121 } |
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122 } else if (v instanceof Boolean) { |
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123 if (!value.equalsIgnoreCase("true") && |
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124 !value.equalsIgnoreCase("false")) { |
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125 throw new IllegalArgumentException("Invalid value:" + |
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126 " VM Option \"" + name + "\"" + |
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127 " expects \"true\" or \"false\"."); |
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128 } |
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129 Flag.setBooleanValue(name, Boolean.parseBoolean(value)); |
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130 } else if (v instanceof String) { |
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131 Flag.setStringValue(name, value); |
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132 } else { |
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133 throw new IllegalArgumentException("VM Option \"" + |
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134 name + "\" is of an unsupported type: " + |
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135 v.getClass().getName()); |
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136 } |
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137 } |
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138 |
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139 @Override |
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140 public ObjectName getObjectName() { |
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141 return Util.newObjectName("com.sun.management:type=HotSpotDiagnostic"); |
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142 } |
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143 } |
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