1 /* 2 * Copyright (c) 2005, 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 package com.sun.management.internal; 26 27 import java.io.IOException; 28 import java.util.ArrayList; 29 import java.util.List; 30 import javax.management.ObjectName; 31 32 import com.sun.management.HotSpotDiagnosticMXBean; 33 import com.sun.management.VMOption; 34 import java.security.AccessController; 35 import java.security.PrivilegedAction; 36 import sun.management.Util; 37 38 /** 39 * Implementation of the diagnostic MBean for Hotspot VM. 40 */ 41 public class HotSpotDiagnostic implements HotSpotDiagnosticMXBean { HotSpotDiagnostic()42 public HotSpotDiagnostic() { 43 } 44 45 @Override dumpHeap(String outputFile, boolean live)46 public void dumpHeap(String outputFile, boolean live) throws IOException { 47 48 String propertyName = "jdk.management.heapdump.allowAnyFileSuffix"; 49 PrivilegedAction<Boolean> pa = () -> Boolean.parseBoolean(System.getProperty(propertyName, "false")); 50 boolean allowAnyFileSuffix = AccessController.doPrivileged(pa); 51 if (!allowAnyFileSuffix && !outputFile.endsWith(".hprof")) { 52 throw new IllegalArgumentException("heapdump file must have .hprof extention"); 53 } 54 55 SecurityManager security = System.getSecurityManager(); 56 if (security != null) { 57 security.checkWrite(outputFile); 58 Util.checkControlAccess(); 59 } 60 61 dumpHeap0(outputFile, live); 62 } 63 dumpHeap0(String outputFile, boolean live)64 private native void dumpHeap0(String outputFile, boolean live) throws IOException; 65 66 @Override getDiagnosticOptions()67 public List<VMOption> getDiagnosticOptions() { 68 List<Flag> allFlags = Flag.getAllFlags(); 69 List<VMOption> result = new ArrayList<>(); 70 for (Flag flag : allFlags) { 71 if (flag.isWriteable() && flag.isExternal()) { 72 result.add(flag.getVMOption()); 73 } 74 } 75 return result; 76 } 77 78 @Override getVMOption(String name)79 public VMOption getVMOption(String name) { 80 if (name == null) { 81 throw new NullPointerException("name cannot be null"); 82 } 83 84 Flag f = Flag.getFlag(name); 85 if (f == null) { 86 throw new IllegalArgumentException("VM option \"" + 87 name + "\" does not exist"); 88 } 89 return f.getVMOption(); 90 } 91 92 @Override setVMOption(String name, String value)93 public void setVMOption(String name, String value) { 94 if (name == null) { 95 throw new NullPointerException("name cannot be null"); 96 } 97 if (value == null) { 98 throw new NullPointerException("value cannot be null"); 99 } 100 101 Util.checkControlAccess(); 102 Flag flag = Flag.getFlag(name); 103 if (flag == null) { 104 throw new IllegalArgumentException("VM option \"" + 105 name + "\" does not exist"); 106 } 107 if (!flag.isWriteable()){ 108 throw new IllegalArgumentException("VM Option \"" + 109 name + "\" is not writeable"); 110 } 111 112 // Check the type of the value 113 Object v = flag.getValue(); 114 if (v instanceof Long) { 115 try { 116 long l = Long.parseLong(value); 117 Flag.setLongValue(name, l); 118 } catch (NumberFormatException e) { 119 throw new IllegalArgumentException("Invalid value:" + 120 " VM Option \"" + name + "\"" + 121 " expects numeric value", e); 122 } 123 } else if (v instanceof Double) { 124 try { 125 double d = Double.parseDouble(value); 126 Flag.setDoubleValue(name, d); 127 } catch (NumberFormatException e) { 128 throw new IllegalArgumentException("Invalid value:" + 129 " VM Option \"" + name + "\"" + 130 " expects numeric value", e); 131 } 132 } else if (v instanceof Boolean) { 133 if (!value.equalsIgnoreCase("true") && 134 !value.equalsIgnoreCase("false")) { 135 throw new IllegalArgumentException("Invalid value:" + 136 " VM Option \"" + name + "\"" + 137 " expects \"true\" or \"false\"."); 138 } 139 Flag.setBooleanValue(name, Boolean.parseBoolean(value)); 140 } else if (v instanceof String) { 141 Flag.setStringValue(name, value); 142 } else { 143 throw new IllegalArgumentException("VM Option \"" + 144 name + "\" is of an unsupported type: " + 145 v.getClass().getName()); 146 } 147 } 148 149 @Override getObjectName()150 public ObjectName getObjectName() { 151 return Util.newObjectName("com.sun.management:type=HotSpotDiagnostic"); 152 } 153 } 154