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8154447: Exempt classes under java.util.concurrent from MH.Lookup restrictions

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Reviewed-by: mchung, martin
This commit is contained in:
Paul Sandoz 2016-04-26 18:42:51 -07:00
parent 1af2806677
commit 27f82bea87
3 changed files with 89 additions and 3 deletions
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9
jdk/src/java.base/share/classes/java/lang/invoke/MethodHandles.java
View File

@ -745,10 +745,13 @@ public class MethodHandles {
if (name.startsWith("java.lang.invoke."))
throw newIllegalArgumentException("illegal lookupClass: "+lookupClass);
// For caller-sensitive MethodHandles.lookup()
// disallow lookup more restricted packages
// For caller-sensitive MethodHandles.lookup() disallow lookup from
// restricted packages. This a fragile and blunt approach.
// TODO replace with a more formal and less fragile mechanism
// that does not bluntly restrict classes under packages within
// java.base from looking up MethodHandles or VarHandles.
if (allowedModes == ALL_MODES && lookupClass.getClassLoader() == null) {
if (name.startsWith("java.") ||
if ((name.startsWith("java.") && !name.startsWith("java.util.concurrent.")) ||
(name.startsWith("sun.") && !name.startsWith("sun.invoke."))) {
throw newIllegalArgumentException("illegal lookupClass: " + lookupClass);
}

46
jdk/test/java/lang/invoke/JavaUtilConcurrentLookupTest.java Normal file
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@ -0,0 +1,46 @@
/*
* Copyright (c) 2016, 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
* @summary Tests that Lookup can be produced from classes under java.util.concurrent
* @bug 8154447
* @compile/module=java.base java/util/concurrent/LookupTester.java
* @run testng/othervm JavaUtilConcurrentLookupTest
*/
import org.testng.annotations.Test;
import java.util.concurrent.LookupTester;
public class JavaUtilConcurrentLookupTest {
@Test
public void testLookup() {
LookupTester.getLookup();
}
@Test
public void testLookupIn() {
LookupTester.getLookupIn();
}
}

37
jdk/test/java/lang/invoke/java.base/java/util/concurrent/LookupTester.java Normal file
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@ -0,0 +1,37 @@
/*
* Copyright (c) 2016, 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.
*/
package java.util.concurrent;
import java.lang.invoke.MethodHandles;
public class LookupTester {
public static MethodHandles.Lookup getLookup() {
return MethodHandles.lookup();
}
public static MethodHandles.Lookup getLookupIn() {
return MethodHandles.lookup().in(ConcurrentHashMap.class);
}
}