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8236582: (fc) FileChannel.map fails with InternalError when security manager enabled

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Reviewed-by: alanb
This commit is contained in:
Brian Burkhalter 2020-01-09 08:31:29 -08:00
parent 863f741611
commit 7cd4d9ac6a
2 changed files with 48 additions and 2 deletions
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8
src/java.base/share/classes/jdk/internal/misc/ExtendedMapMode.java
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@ -27,8 +27,11 @@ package jdk.internal.misc;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.invoke.MethodType;
import java.nio.channels.FileChannel.MapMode;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
/**
* JDK-specific map modes implemented in java.base.
@ -36,10 +39,11 @@ import java.nio.channels.FileChannel.MapMode;
public class ExtendedMapMode {
static final MethodHandle MAP_MODE_CONSTRUCTOR;
static {
try {
var lookup = MethodHandles.privateLookupIn(MapMode.class, MethodHandles.lookup());
PrivilegedExceptionAction<Lookup> pae = () ->
MethodHandles.privateLookupIn(MapMode.class, MethodHandles.lookup());
Lookup lookup = AccessController.doPrivileged(pae);
var methodType = MethodType.methodType(void.class, String.class);
MAP_MODE_CONSTRUCTOR = lookup.findConstructor(MapMode.class, methodType);
} catch (Exception e) {

42
test/jdk/java/nio/channels/FileChannel/MapWithSecurityManager.java Normal file
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@ -0,0 +1,42 @@
/*
* Copyright (c) 2020, 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.
*
* 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.
*/
/* @test
* @bug 8236582
* @summary Tests the map method when running with a security manager
*/
import java.io.IOException;
import java.nio.channels.FileChannel;
import java.nio.file.Files;
import java.nio.file.Path;
public class MapWithSecurityManager {
public static void main(String[] args) throws IOException {
Path tempFile = Files.createTempFile("test", "test");
try (FileChannel ch = FileChannel.open(tempFile)) {
System.setSecurityManager(new SecurityManager());
ch.map(FileChannel.MapMode.READ_ONLY, 0, 0);
}
}
}