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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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package com.sun.management.internal;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.management.ObjectName;

import com.sun.management.HotSpotDiagnosticMXBean;
import com.sun.management.VMOption;
import java.security.AccessController;
import java.security.PrivilegedAction;
import sun.management.Util;

Implementation of the diagnostic MBean for Hotspot VM.
/** * Implementation of the diagnostic MBean for Hotspot VM. */
public class HotSpotDiagnostic implements HotSpotDiagnosticMXBean { public HotSpotDiagnostic() { } @Override public void dumpHeap(String outputFile, boolean live) throws IOException { String propertyName = "jdk.management.heapdump.allowAnyFileSuffix"; PrivilegedAction<Boolean> pa = () -> Boolean.parseBoolean(System.getProperty(propertyName, "false")); boolean allowAnyFileSuffix = AccessController.doPrivileged(pa); if (!allowAnyFileSuffix && !outputFile.endsWith(".hprof")) { throw new IllegalArgumentException("heapdump file must have .hprof extention"); } SecurityManager security = System.getSecurityManager(); if (security != null) { security.checkWrite(outputFile); Util.checkControlAccess(); } dumpHeap0(outputFile, live); } private native void dumpHeap0(String outputFile, boolean live) throws IOException; @Override public List<VMOption> getDiagnosticOptions() { List<Flag> allFlags = Flag.getAllFlags(); List<VMOption> result = new ArrayList<>(); for (Flag flag : allFlags) { if (flag.isWriteable() && flag.isExternal()) { result.add(flag.getVMOption()); } } return result; } @Override public VMOption getVMOption(String name) { if (name == null) { throw new NullPointerException("name cannot be null"); } Flag f = Flag.getFlag(name); if (f == null) { throw new IllegalArgumentException("VM option \"" + name + "\" does not exist"); } return f.getVMOption(); } @Override public void setVMOption(String name, String value) { if (name == null) { throw new NullPointerException("name cannot be null"); } if (value == null) { throw new NullPointerException("value cannot be null"); } Util.checkControlAccess(); Flag flag = Flag.getFlag(name); if (flag == null) { throw new IllegalArgumentException("VM option \"" + name + "\" does not exist"); } if (!flag.isWriteable()){ throw new IllegalArgumentException("VM Option \"" + name + "\" is not writeable"); } // Check the type of the value Object v = flag.getValue(); if (v instanceof Long) { try { long l = Long.parseLong(value); Flag.setLongValue(name, l); } catch (NumberFormatException e) { throw new IllegalArgumentException("Invalid value:" + " VM Option \"" + name + "\"" + " expects numeric value", e); } } else if (v instanceof Double) { try { double d = Double.parseDouble(value); Flag.setDoubleValue(name, d); } catch (NumberFormatException e) { throw new IllegalArgumentException("Invalid value:" + " VM Option \"" + name + "\"" + " expects numeric value", e); } } else if (v instanceof Boolean) { if (!value.equalsIgnoreCase("true") && !value.equalsIgnoreCase("false")) { throw new IllegalArgumentException("Invalid value:" + " VM Option \"" + name + "\"" + " expects \"true\" or \"false\"."); } Flag.setBooleanValue(name, Boolean.parseBoolean(value)); } else if (v instanceof String) { Flag.setStringValue(name, value); } else { throw new IllegalArgumentException("VM Option \"" + name + "\" is of an unsupported type: " + v.getClass().getName()); } } @Override public ObjectName getObjectName() { return Util.newObjectName("com.sun.management:type=HotSpotDiagnostic"); } }