8014737: java/lang/invoke/7196190/MHProxyTest.java fails after 8009424
Reviewed-by: twisti
This commit is contained in:
Chris Hegarty
parent
1dedaf5bf0
commit
0431243910
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/*
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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/**
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* @test
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* @bug 7196190
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* @summary Improve method of handling MethodHandles
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*
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* @run main/othervm MHProxyTest
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*/
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import java.lang.invoke.*;
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import java.security.*;
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import static java.lang.invoke.MethodHandles.*;
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import static java.lang.invoke.MethodType.*;
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public class MHProxyTest {
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private static final Class<?> C_Unsafe;
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private static final MethodHandle MH_getUnsafe;
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static {
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// Do these before there is a SM installed.
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C_Unsafe = sun.misc.Unsafe.class; // EXPECT A WARNING ON THIS LINE
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Lookup lookup = lookup();
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MethodHandle gumh = null;
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try {
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gumh = lookup.findStatic(C_Unsafe, "getUnsafe", methodType(C_Unsafe));
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} catch (ReflectiveOperationException ex) {
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throw new InternalError(ex.toString());
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}
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MH_getUnsafe = gumh;
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// Try some different lookups:
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try {
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lookup.in(Object.class).findStatic(C_Unsafe, "getUnsafe", methodType(C_Unsafe));
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} catch (ReflectiveOperationException ex) {
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throw new InternalError(ex.toString());
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}
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lookup = lookup().in(C_Unsafe);
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try {
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lookup.in(C_Unsafe).findStatic(C_Unsafe, "getUnsafe", methodType(C_Unsafe));
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} catch (ReflectiveOperationException ex) {
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throw new InternalError(ex.toString());
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}
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}
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public static void main(String[] args) throws Throwable {
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System.setSecurityManager(new SecurityManager());
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Lookup lookup = lookup();
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testBasic(lookup);
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testDoPriv(lookup);
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testSetVar();
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Lookup l2 = lookup.in(Object.class);
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System.out.println("=== "+l2);
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testBasic(l2);
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testDoPriv(l2);
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Lookup l3 = lookup.in(C_Unsafe);
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System.out.println("=== "+l3);
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testBasic(l3);
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testDoPriv(l3);
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if (failure != null)
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throw failure;
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}
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private static Throwable failure;
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private static void fail(Throwable ex) {
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if (failure == null)
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failure = ex;
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StackTraceElement frame = new Exception().getStackTrace()[1];
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System.out.printf("Failed at %s:%d: %s\n", frame.getFileName(), frame.getLineNumber(), ex);
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}
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private static void ok(Throwable ex) {
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StackTraceElement frame = new Exception().getStackTrace()[1];
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System.out.printf("OK at %s:%d: %s\n", frame.getFileName(), frame.getLineNumber(), ex);
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}
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private static void testBasic(Lookup lookup) throws Throwable {
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// Verify that we can't get to this guy under the SM:
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try {
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MethodHandle badmh = lookup.findStatic(C_Unsafe, "getUnsafe", methodType(C_Unsafe));
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assert(badmh.type() == methodType(C_Unsafe));
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badmh = badmh.asType(badmh.type().generic());
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Object u = C_Unsafe.cast(badmh.invokeExact());
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assert(C_Unsafe.isInstance(u));
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fail(new AssertionError("got mh to getUnsafe!"));
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} catch (SecurityException ex) {
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ok(ex);
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}
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try {
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Object u = MH_getUnsafe.invokeWithArguments();
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assert(C_Unsafe.isInstance(u));
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fail(new AssertionError("got the Unsafe object! (MH invoke)"));
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} catch (SecurityException ex) {
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ok(ex);
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}
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try {
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MethodHandle mh = MH_getUnsafe;
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mh = mh.asType(mh.type().generic());
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mh = foldArguments(identity(Object.class), mh);
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mh = filterReturnValue(mh, identity(Object.class));
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Object u = mh.invokeExact();
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assert(C_Unsafe.isInstance(u));
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fail(new AssertionError("got the Unsafe object! (MH invokeWithArguments)"));
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} catch (SecurityException ex) {
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ok(ex);
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}
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}
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private static void testDoPriv(Lookup lookup) throws Throwable {
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PrivilegedAction privAct = MethodHandleProxies.asInterfaceInstance(PrivilegedAction.class, MH_getUnsafe);
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try {
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Object u = AccessController.doPrivileged(privAct);
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assert(C_Unsafe.isInstance(u));
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fail(new AssertionError("got the Unsafe object! (static doPriv)"));
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} catch (SecurityException ex) {
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ok(ex);
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}
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MethodHandle MH_doPriv = lookup.findStatic(AccessController.class, "doPrivileged",
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methodType(Object.class, PrivilegedAction.class));
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MH_doPriv = MH_doPriv.bindTo(privAct);
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try {
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Object u = MH_doPriv.invoke();
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assert(C_Unsafe.isInstance(u));
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fail(new AssertionError("got the Unsafe object! (MH + doPriv)"));
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} catch (SecurityException ex) {
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ok(ex);
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}
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// try one more layer of indirection:
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Runnable rbl = MethodHandleProxies.asInterfaceInstance(Runnable.class, MH_doPriv);
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try {
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rbl.run();
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fail(new AssertionError("got the Unsafe object! (Runnable + MH + doPriv)"));
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} catch (SecurityException ex) {
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ok(ex);
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}
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}
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private static void testSetVar() throws Throwable {
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{
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// Test the box pattern:
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Object[] box = new Object[1];
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MethodHandle MH_getFoo = identity(Object.class).bindTo("foo");
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MethodHandle MH_storeToBox = insertArguments(arrayElementSetter(Object[].class), 0, box, 0);
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MethodHandle mh = filterReturnValue(MH_getFoo, MH_storeToBox);
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mh.invokeExact();
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assert(box[0] == "foo");
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}
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{
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Object[] box = new Object[1];
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MethodHandle MH_storeToBox = insertArguments(arrayElementSetter(Object[].class), 0, box, 0);
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MethodHandle mh = filterReturnValue(MH_getUnsafe.asType(MH_getUnsafe.type().generic()), MH_storeToBox);
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try {
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mh.invokeExact();
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Object u = box[0];
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assert(C_Unsafe.isInstance(u));
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fail(new AssertionError("got the Unsafe object! (MH + setElement)"));
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} catch (SecurityException ex) {
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ok(ex);
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}
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}
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}
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}
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