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/*
* Copyright (c) 2017, 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.
*/
/*
* @test
* @bug 8157246
* @summary Tests invocation of MethodHandle with invalid leading argument
* @run testng/othervm test.java.lang.invoke.InvokeMethodHandleWithBadArgument
*/
package test.java.lang.invoke;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.invoke.MethodType;
import java.lang.invoke.VarHandle;
import static java.lang.invoke.MethodType.methodType;
import static org.testng.AssertJUnit.*;
import org.testng.annotations.*;
/**
* Tests invocation of MethodHandle with invalid leading argument such as
* MethodHandle, VarHandle, and array object
*/
public class InvokeMethodHandleWithBadArgument {
// ---- null array reference ----
@Test(expectedExceptions = {NullPointerException.class})
public static void testAsSpreaderPosInvokeWithNull() throws Throwable {
MethodHandle spreader = MH_spread.asSpreader(1, int[].class, 3);
spreader.invoke("A", null, "B");
}
@Test(expectedExceptions = {NullPointerException.class})
public static void testAsSpreaderInvokeWithNull() throws Throwable {
MethodHandle spreader = MH_String_equals.asSpreader(String[].class, 2);
assert ((boolean) spreader.invokeExact(new String[]{"me", "me"}));
boolean eq = (boolean) spreader.invokeExact((String[]) null);
}
// ---- incorrect array element count ----
@Test(expectedExceptions = {IllegalArgumentException.class})
public static void testAsSpreaderPosInvokeWithBadElementCount() throws Throwable {
MethodHandle spreader = MH_spread.asSpreader(1, int[].class, 3);
spreader.invoke("A", new int[]{1, 2}, "B");
}
@Test(expectedExceptions = {IllegalArgumentException.class})
public static void testAsSpreaderInvokeWithBadElementCount() throws Throwable {
MethodHandle spreader = MH_String_equals.asSpreader(String[].class, 2);
assert (!(boolean) spreader.invokeExact(new String[]{"me", "thee"}));
boolean eq = (boolean) spreader.invokeExact(new String[0]);
}
// ---- spread no argument ----
@Test
public static void testAsSpreaderPosInvokeWithZeroLength() throws Throwable {
MethodHandle spreader = MH_spread.asSpreader(1, int[].class, 0);
assert("A123B".equals(spreader.invoke("A", (int[])null, 1, 2, 3, "B")));
}
@Test
public static void testAsSpreaderInvokeWithZeroLength() throws Throwable {
MethodHandle spreader = MH_String_equals.asSpreader(String[].class, 0);
assert ((boolean) spreader.invokeExact("me", (Object)"me", new String[0]));
boolean eq = (boolean) spreader.invokeExact("me", (Object)"me", (String[]) null);
}
// ---- invokers with null method/var handle argument ----
@Test(expectedExceptions = {NullPointerException.class})
public static void testInvokerWithNull() throws Throwable {
MethodType type = methodType(int.class, int.class, int.class);
MethodHandle invoker = MethodHandles.invoker(type);
assert((int) invoker.invoke(MH_add, 1, 2) == 3);
int sum = (int)invoker.invoke((MethodHandle)null, 1, 2);
}
@Test(expectedExceptions = {NullPointerException.class})
public static void testExactInvokerWithNull() throws Throwable {
MethodType type = methodType(int.class, int.class, int.class);
MethodHandle invoker = MethodHandles.exactInvoker(type);
assert((int) invoker.invoke(MH_add, 1, 2) == 3);
int sum = (int)invoker.invokeExact((MethodHandle)null, 1, 2);
}
@Test(expectedExceptions = {NullPointerException.class})
public static void testSpreadInvokerWithNull() throws Throwable {
MethodType type = methodType(boolean.class, String.class, String.class);
MethodHandle invoker = MethodHandles.spreadInvoker(type, 0);
assert ((boolean) invoker.invoke(MH_String_equals, new String[]{"me", "me"}));
boolean eq = (boolean) invoker.invoke((MethodHandle)null, new String[]{"me", "me"});
}
@Test(expectedExceptions = {NullPointerException.class})
public static void testVarHandleInvokerWithNull() throws Throwable {
VarHandle.AccessMode am = VarHandle.AccessMode.GET;
MethodHandle invoker = MethodHandles.varHandleInvoker(am, VH_array.accessModeType(am));
assert ((int) invoker.invoke(VH_array, array, 3) == 3);
int value = (int)invoker.invoke((VarHandle)null, array, 3);
}
@Test(expectedExceptions = {NullPointerException.class})
public static void testVarHandleExactInvokerWithNull() throws Throwable {
VarHandle.AccessMode am = VarHandle.AccessMode.GET;
MethodHandle invoker = MethodHandles.varHandleExactInvoker(am, VH_array.accessModeType(am));
assert ((int) invoker.invoke(VH_array, array, 3) == 3);
int value = (int)invoker.invokeExact((VarHandle)null, array, 3);
}
static final Lookup LOOKUP = MethodHandles.lookup();
static final MethodHandle MH_add;
static final MethodHandle MH_spread;
static final MethodHandle MH_String_equals;
static final VarHandle VH_array;
static final int[] array = new int[] { 0, 1, 2, 3, 4, 5};
static {
try {
Class<?> arrayClass = Class.forName("[I");
VH_array = MethodHandles.arrayElementVarHandle(arrayClass);
MH_add = LOOKUP.findStatic(InvokeMethodHandleWithBadArgument.class, "add",
methodType(int.class, int.class, int.class));
MH_spread = LOOKUP.findStatic(InvokeMethodHandleWithBadArgument.class, "spread",
methodType(String.class, String.class, int.class, int.class, int.class, String.class));
MH_String_equals = LOOKUP.findVirtual(String.class, "equals", methodType(boolean.class, Object.class));
} catch (Exception e) {
throw new ExceptionInInitializerError(e);
}
}
static String spread(String s1, int i1, int i2, int i3, String s2) {
return s1 + i1 + i2 + i3 + s2;
}
static int add(int x, int y) {
return x+y;
}
}
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