/* * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package jdk.jfr; import java.util.Collections; import java.util.List; import java.util.Map; import java.util.Objects; import jdk.jfr.internal.PlatformEventType; import jdk.jfr.internal.PlatformRecorder; import jdk.jfr.internal.PlatformRecording; import jdk.jfr.internal.PrivateAccess; import jdk.jfr.internal.Type; import jdk.jfr.internal.Utils; /** * Permission for controlling access to Flight Recorder. *
* The following table provides a summary of what the permission * allows, and the risks of granting code the permission. * *
Permission Target Name | *What the Permission Allows | *Risks of Allowing this Permission | *
---|---|---|
{@code accessFlightRecorder} | *Ability to create a Flight Recorder instance, register callbacks to * monitor the Flight Recorder life cycle, and control an existing instance * of Flight Recorder, which can record and dump runtime information, such as * stack traces, class names, and data in user defined events. | *A malicious user may be able to extract sensitive information that is stored in * events and interrupt Flight Recorder by installing listeners or hooks that * never finish. | *
{@code registerEvent} | *Ability to register events, write data to the Flight Recorder buffers, * and execute code in a callback function for periodic events. * * | A malicious user may be able to write sensitive information to Flight * Recorder buffers. | *
* Typically, programmers do not create {@code FlightRecorderPermission} objects
* directly. Instead the objects are created by the security policy code that is based on
* reading the security policy file.
*
* @since 9
*
* @see java.security.BasicPermission
* @see java.security.Permission
* @see java.security.Permissions
* @see java.security.PermissionCollection
* @see java.lang.SecurityManager
*
*/
@SuppressWarnings("serial")
public final class FlightRecorderPermission extends java.security.BasicPermission {
// Purpose of InternalAccess is to give classes in jdk.jfr.internal
// access to package private methods in this package (jdk.jfr).
//
// The initialization could be done in any class in this package,
// but this one was chosen because it is light weight and
// lacks dependencies on other public classes.
static {
PrivateAccess.setPrivateAccess(new InternalAccess());
}
private final static class InternalAccess extends PrivateAccess {
@Override
public Type getType(Object o) {
if (o instanceof AnnotationElement) {
return ((AnnotationElement) o).getType();
}
if (o instanceof EventType) {
return ((EventType) o).getType();
}
if (o instanceof ValueDescriptor) {
return ((ValueDescriptor) o).getType();
}
if (o instanceof SettingDescriptor) {
return ((SettingDescriptor) o).getType();
}
throw new Error("Unknown type " + o.getClass());
}
@Override
public Configuration newConfiguration(String name, String label, String description, String provider, Map