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VarargsArrayTest.java
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VarargsArrayTest.java
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/*
* Copyright (c) 2014, 2015, 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.lang.invoke;
import sun.invoke.util.Wrapper;
import java.util.Arrays;
import java.util.Collections;
import com.oracle.testlibrary.jsr292.CodeCacheOverflowProcessor;
/* @test
* @summary unit tests for varargs array methods: MethodHandleInfo.varargsArray(int),
* MethodHandleInfo.varargsArray(Class,int) & MethodHandleInfo.varargsList(int)
* @library /lib/testlibrary /lib/testlibrary/jsr292
* @run main/othervm/bootclasspath java.lang.invoke.VarargsArrayTest
* @run main/othervm/bootclasspath -DVarargsArrayTest.MAX_ARITY=255 -DVarargsArrayTest.START_ARITY=250 java.lang.invoke.VarargsArrayTest
*/
/* This might take a while and burn lots of metadata:
* @run main/othervm/bootclasspath -DVarargsArrayTest.MAX_ARITY=255 -DVarargsArrayTest.EXHAUSTIVE=true java.lang.invoke.VarargsArrayTest
*/
public class VarargsArrayTest {
private static final Class<?> CLASS = VarargsArrayTest.class;
private static final int MAX_ARITY = Integer.getInteger(CLASS.getSimpleName()+".MAX_ARITY", 40);
private static final int START_ARITY = Integer.getInteger(CLASS.getSimpleName()+".START_ARITY", 0);
private static final boolean EXHAUSTIVE = Boolean.getBoolean(CLASS.getSimpleName()+".EXHAUSTIVE");
public static void main(String[] args) throws Throwable {
CodeCacheOverflowProcessor.runMHTest(VarargsArrayTest::test);
}
public static void test() throws Throwable {
testVarargsArray();
testVarargsReferenceArray();
testVarargsPrimitiveArray();
}
public static void testVarargsArray() throws Throwable {
final int MIN = START_ARITY;
final int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added
for (int nargs = MIN; nargs <= MAX; nargs = nextArgCount(nargs, 17, MAX)) {
MethodHandle target = MethodHandleImpl.varargsArray(nargs);
Object[] args = new Object[nargs];
for (int i = 0; i < nargs; i++)
args[i] = "#"+i;
Object res = target.invokeWithArguments(args);
assertArrayEquals(args, (Object[])res);
}
}
public static void testVarargsReferenceArray() throws Throwable {
testTypedVarargsArray(Object[].class);
testTypedVarargsArray(String[].class);
testTypedVarargsArray(Number[].class);
}
public static void testVarargsPrimitiveArray() throws Throwable {
testTypedVarargsArray(int[].class);
testTypedVarargsArray(long[].class);
testTypedVarargsArray(byte[].class);
testTypedVarargsArray(boolean[].class);
testTypedVarargsArray(short[].class);
testTypedVarargsArray(char[].class);
testTypedVarargsArray(float[].class);
testTypedVarargsArray(double[].class);
}
private static int nextArgCount(int nargs, int density, int MAX) {
if (EXHAUSTIVE) return nargs + 1;
if (nargs >= MAX) return Integer.MAX_VALUE;
int BOT = 20, TOP = MAX-5;
if (density < 10) { BOT = 10; MAX = TOP-2; }
if (nargs <= BOT || nargs >= TOP) {
++nargs;
} else {
int bump = Math.max(1, 100 / density);
nargs += bump;
if (nargs > TOP) nargs = TOP;
}
return nargs;
}
private static void testTypedVarargsArray(Class<?> arrayType) throws Throwable {
Class<?> elemType = arrayType.getComponentType();
int MIN = START_ARITY;
int MAX = MAX_ARITY-2; // 253+1 would cause parameter overflow with 'this' added
int density = 3;
if (elemType == int.class || elemType == long.class) density = 7;
if (elemType == long.class || elemType == double.class) { MAX /= 2; MIN /= 2; }
for (int nargs = MIN; nargs <= MAX; nargs = nextArgCount(nargs, density, MAX)) {
Object[] args = makeTestArray(elemType, nargs);
MethodHandle varargsArray = MethodHandleImpl.varargsArray(arrayType, nargs);
MethodType vaType = varargsArray.type();
assertEquals(arrayType, vaType.returnType());
if (nargs != 0) {
assertEquals(elemType, vaType.parameterType(0));
assertEquals(elemType, vaType.parameterType(vaType.parameterCount()-1));
}
assertEquals(MethodType.methodType(arrayType, Collections.<Class<?>>nCopies(nargs, elemType)),
vaType);
Object res = varargsArray.invokeWithArguments(args);
assertEquals(res.getClass(), arrayType);
String resString = toArrayString(res);
assertEquals(Arrays.toString(args), resString);
MethodHandle spreader = varargsArray.asSpreader(arrayType, nargs);
MethodType stype = spreader.type();
assert(stype == MethodType.methodType(arrayType, arrayType));
if (nargs <= 5) {
// invoke target as a spreader also:
@SuppressWarnings("cast")
Object res2 = spreader.invokeWithArguments((Object)res);
String res2String = toArrayString(res2);
assertEquals(Arrays.toString(args), res2String);
// invoke the spreader on a generic Object[] array; check for error
try {
Object res3 = spreader.invokeWithArguments((Object)args);
String res3String = toArrayString(res3);
assertTrue(arrayType.getName(), arrayType.isAssignableFrom(Object[].class));
assertEquals(Arrays.toString(args), res3String);
} catch (ClassCastException ex) {
assertFalse(arrayType.getName(), arrayType.isAssignableFrom(Object[].class));
}
}
if (nargs == 0) {
// invoke spreader on null arglist
Object res3 = spreader.invokeWithArguments((Object)null);
String res3String = toArrayString(res3);
assertEquals(Arrays.toString(args), res3String);
}
}
}
private static Object[] makeTestArray(Class<?> elemType, int len) {
Wrapper elem = null;
if (elemType.isPrimitive())
elem = Wrapper.forPrimitiveType(elemType);
else if (Wrapper.isWrapperType(elemType))
elem = Wrapper.forWrapperType(elemType);
Object[] args = new Object[len];
for (int i = 0; i < len; i++) {
Object arg = i * 100;
if (elem == null) {
if (elemType == String.class)
arg = "#"+arg;
arg = elemType.cast(arg); // just to make sure
} else {
switch (elem) {
case BOOLEAN: arg = (i % 3 == 0); break;
case CHAR: arg = 'a' + i; break;
case LONG: arg = (long)i * 1000_000_000; break;
case FLOAT: arg = (float)i / 100; break;
case DOUBLE: arg = (double)i / 1000_000; break;
}
arg = elem.cast(arg, elemType);
}
args[i] = arg;
}
return args;
}
private static String toArrayString(Object a) {
if (a == null) return "null";
Class<?> elemType = a.getClass().getComponentType();
if (elemType == null) return a.toString();
if (elemType.isPrimitive()) {
switch (Wrapper.forPrimitiveType(elemType)) {
case INT: return Arrays.toString((int[])a);
case BYTE: return Arrays.toString((byte[])a);
case BOOLEAN: return Arrays.toString((boolean[])a);
case SHORT: return Arrays.toString((short[])a);
case CHAR: return Arrays.toString((char[])a);
case FLOAT: return Arrays.toString((float[])a);
case LONG: return Arrays.toString((long[])a);
case DOUBLE: return Arrays.toString((double[])a);
}
}
return Arrays.toString((Object[])a);
}
public static void assertArrayEquals(Object[] arr1, Object[] arr2) {
if (arr1 == null && arr2 == null) return;
if (arr1 != null && arr2 != null && arr1.length == arr2.length) {
for (int i = 0; i < arr1.length; i++) {
assertEquals(arr1[i], arr2[i]);
}
return;
}
throw new AssertionError(Arrays.deepToString(arr1) + " != " + Arrays.deepToString(arr2));
}
public static void assertEquals(Object o1, Object o2) {
if (o1 == null && o2 == null) return;
if (o1 != null && o1.equals(o2)) return;
throw new AssertionError(o1 + " != " + o2);
}
public static void assertTrue(String msg, boolean b) {
if (!b) {
throw new AssertionError(msg);
}
}
public static void assertFalse(String msg, boolean b) {
assertTrue(msg, !b);
}
}