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/*
* Copyright (c) 2018, 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 unit tests for java.lang.invoke.MethodHandles
* @library /lib/testlibrary /java/lang/invoke/common
* @compile MethodHandlesTest.java MethodHandlesInvokersTest.java remote/RemoteExample.java
* @run junit/othervm/timeout=2500 -XX:+IgnoreUnrecognizedVMOptions
* -XX:-VerifyDependencies
* -esa
* test.java.lang.invoke.MethodHandlesInvokersTest
*/
package test.java.lang.invoke;
import org.junit.*;
import test.java.lang.invoke.lib.CodeCacheOverflowProcessor;
import java.lang.invoke.CallSite;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.invoke.MutableCallSite;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import static org.junit.Assert.*;
public class MethodHandlesInvokersTest extends MethodHandlesTest {
@Test // SLOW
public void testInvokers() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testInvokers0);
}
public void testInvokers0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("exactInvoker, genericInvoker, varargsInvoker, dynamicInvoker");
// exactInvoker, genericInvoker, varargsInvoker[0..N], dynamicInvoker
Set<MethodType> done = new HashSet<>();
for (int i = 0; i <= 6; i++) {
if (CAN_TEST_LIGHTLY && i > 3) break;
MethodType gtype = MethodType.genericMethodType(i);
for (Class<?> argType : new Class<?>[]{Object.class, Integer.class, int.class}) {
for (int j = -1; j < i; j++) {
MethodType type = gtype;
if (j < 0)
type = type.changeReturnType(argType);
else if (argType == void.class)
continue;
else
type = type.changeParameterType(j, argType);
if (done.add(type))
testInvokersWithCatch(type);
MethodType vtype = type.changeReturnType(void.class);
if (done.add(vtype))
testInvokersWithCatch(vtype);
}
}
}
}
public void testInvokersWithCatch(MethodType type) throws Throwable {
try {
testInvokers(type);
} catch (Throwable ex) {
System.out.println("*** testInvokers on "+type+" => ");
ex.printStackTrace(System.out);
}
}
public void testInvokers(MethodType type) throws Throwable {
if (verbosity >= 3)
System.out.println("test invokers for "+type);
int nargs = type.parameterCount();
boolean testRetCode = type.returnType() != void.class;
MethodHandle target = PRIVATE.findStatic(MethodHandlesTest.class, "invokee",
MethodType.genericMethodType(0, true));
assertTrue(target.isVarargsCollector());
target = target.asType(type);
Object[] args = randomArgs(type.parameterArray());
List<Object> targetPlusArgs = new ArrayList<>(Arrays.asList(args));
targetPlusArgs.add(0, target);
int code = (Integer) invokee(args);
Object log = logEntry("invokee", args);
assertEquals(log.hashCode(), code);
assertCalled("invokee", args);
MethodHandle inv;
Object result;
// exact invoker
countTest();
calledLog.clear();
inv = MethodHandles.exactInvoker(type);
result = inv.invokeWithArguments(targetPlusArgs);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
// generic invoker
countTest();
inv = MethodHandles.invoker(type);
if (nargs <= 3 && type == type.generic()) {
calledLog.clear();
switch (nargs) {
case 0:
result = inv.invokeExact(target);
break;
case 1:
result = inv.invokeExact(target, args[0]);
break;
case 2:
result = inv.invokeExact(target, args[0], args[1]);
break;
case 3:
result = inv.invokeExact(target, args[0], args[1], args[2]);
break;
}
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
calledLog.clear();
result = inv.invokeWithArguments(targetPlusArgs);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
// varargs invoker #0
calledLog.clear();
inv = MethodHandles.spreadInvoker(type, 0);
if (type.returnType() == Object.class) {
result = inv.invokeExact(target, args);
} else if (type.returnType() == void.class) {
result = null; inv.invokeExact(target, args);
} else {
result = inv.invokeWithArguments(target, (Object) args);
}
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
if (nargs >= 1 && type == type.generic()) {
// varargs invoker #1
calledLog.clear();
inv = MethodHandles.spreadInvoker(type, 1);
result = inv.invokeExact(target, args[0], Arrays.copyOfRange(args, 1, nargs));
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
if (nargs >= 2 && type == type.generic()) {
// varargs invoker #2
calledLog.clear();
inv = MethodHandles.spreadInvoker(type, 2);
result = inv.invokeExact(target, args[0], args[1], Arrays.copyOfRange(args, 2, nargs));
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
if (nargs >= 3 && type == type.generic()) {
// varargs invoker #3
calledLog.clear();
inv = MethodHandles.spreadInvoker(type, 3);
result = inv.invokeExact(target, args[0], args[1], args[2], Arrays.copyOfRange(args, 3, nargs));
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
for (int k = 0; k <= nargs; k++) {
// varargs invoker #0..N
if (CAN_TEST_LIGHTLY && (k > 1 || k < nargs - 1)) continue;
countTest();
calledLog.clear();
inv = MethodHandles.spreadInvoker(type, k);
MethodType expType = (type.dropParameterTypes(k, nargs)
.appendParameterTypes(Object[].class)
.insertParameterTypes(0, MethodHandle.class));
assertEquals(expType, inv.type());
List<Object> targetPlusVarArgs = new ArrayList<>(targetPlusArgs);
List<Object> tailList = targetPlusVarArgs.subList(1+k, 1+nargs);
Object[] tail = tailList.toArray();
tailList.clear(); tailList.add(tail);
result = inv.invokeWithArguments(targetPlusVarArgs);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
// dynamic invoker
countTest();
CallSite site = new MutableCallSite(type);
inv = site.dynamicInvoker();
// see if we get the result of the original target:
try {
result = inv.invokeWithArguments(args);
assertTrue("should not reach here", false);
} catch (IllegalStateException ex) {
String msg = ex.getMessage();
assertTrue(msg, msg.contains("site"));
}
// set new target after invoker is created, to make sure we track target
site.setTarget(target);
calledLog.clear();
result = inv.invokeWithArguments(args);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
}
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