/*
* Copyright (c) 2018, 2019, 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
* @bug 8216558
* @summary unit tests for java.lang.invoke.MethodHandles
* @library /test/lib /java/lang/invoke/common
* @compile MethodHandlesTest.java MethodHandlesGeneralTest.java remote/RemoteExample.java
* @run junit/othervm/timeout=2500 -XX:+IgnoreUnrecognizedVMOptions
* -XX:-VerifyDependencies
* -esa
* test.java.lang.invoke.MethodHandlesGeneralTest
*/
package test.java.lang.invoke;
import org.junit.*;
import test.java.lang.invoke.lib.CodeCacheOverflowProcessor;
import test.java.lang.invoke.remote.RemoteExample;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandleProxies;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.invoke.WrongMethodTypeException;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.UndeclaredThrowableException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Formatter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static java.lang.invoke.MethodType.methodType;
import static org.junit.Assert.*;
public class MethodHandlesGeneralTest extends MethodHandlesTest {
@Test
public void testFirst() throws Throwable {
verbosity += 9;
try {
// left blank for debugging
} finally { printCounts(); verbosity -= 9; }
}
@Test
public void testFindStatic() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindStatic0);
}
public void testFindStatic0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findStatic");
testFindStatic(PubExample.class, void.class, "s0");
testFindStatic(Example.class, void.class, "s0");
testFindStatic(Example.class, void.class, "pkg_s0");
testFindStatic(Example.class, void.class, "pri_s0");
testFindStatic(Example.class, void.class, "pro_s0");
testFindStatic(PubExample.class, void.class, "Pub/pro_s0");
testFindStatic(Example.class, Object.class, "s1", Object.class);
testFindStatic(Example.class, Object.class, "s2", int.class);
testFindStatic(Example.class, Object.class, "s3", long.class);
testFindStatic(Example.class, Object.class, "s4", int.class, int.class);
testFindStatic(Example.class, Object.class, "s5", long.class, int.class);
testFindStatic(Example.class, Object.class, "s6", int.class, long.class);
testFindStatic(Example.class, Object.class, "s7", float.class, double.class);
testFindStatic(false, PRIVATE, Example.class, void.class, "bogus");
testFindStatic(false, PRIVATE, Example.class, void.class, "<init>", int.class);
testFindStatic(false, PRIVATE, Example.class, void.class, "<init>", Void.class);
testFindStatic(false, PRIVATE, Example.class, void.class, "v0");
}
void testFindStatic(Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
for (Object[] ac : accessCases(defc, name)) {
testFindStatic((Boolean)ac[0], (Lookup)ac[1], defc, ret, name, params);
}
}
void testFindStatic(Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
testFindStatic(true, lookup, defc, ret, name, params);
}
void testFindStatic(boolean positive, Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
countTest(positive);
String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
MethodType type = MethodType.methodType(ret, params);
MethodHandle target = null;
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
target = maybeMoveIn(lookup, defc).findStatic(defc, methodName, type);
} catch (ReflectiveOperationException ex) {
noAccess = ex;
assertExceptionClass(
(name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
? NoSuchMethodException.class
: IllegalAccessException.class,
noAccess);
if (verbosity >= 5) ex.printStackTrace(System.out);
}
if (verbosity >= 3)
System.out.println("findStatic "+lookup+": "+defc.getName()+"."+name+"/"+type+" => "+target
+(noAccess == null ? "" : " !! "+noAccess));
if (positive && noAccess != null) throw noAccess;
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
assertEquals(type, target.type());
assertNameStringContains(target, methodName);
Object[] args = randomArgs(params);
printCalled(target, name, args);
target.invokeWithArguments(args);
assertCalled(name, args);
if (verbosity >= 1)
System.out.print(':');
}
@Test
public void testFindVirtual() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindVirtual0);
}
public void testFindVirtual0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findVirtual");
testFindVirtual(Example.class, void.class, "v0");
testFindVirtual(Example.class, void.class, "pkg_v0");
testFindVirtual(Example.class, void.class, "pri_v0");
testFindVirtual(Example.class, Object.class, "v1", Object.class);
testFindVirtual(Example.class, Object.class, "v2", Object.class, Object.class);
testFindVirtual(Example.class, Object.class, "v2", Object.class, int.class);
testFindVirtual(Example.class, Object.class, "v2", int.class, Object.class);
testFindVirtual(Example.class, Object.class, "v2", int.class, int.class);
testFindVirtual(Example.class, void.class, "pro_v0");
testFindVirtual(PubExample.class, void.class, "Pub/pro_v0");
testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "bogus");
testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "<init>", int.class);
testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "<init>", Void.class);
testFindVirtual(false, PRIVATE, Example.class, Example.class, void.class, "s0");
// test dispatch
testFindVirtual(SubExample.class, SubExample.class, void.class, "Sub/v0");
testFindVirtual(SubExample.class, Example.class, void.class, "Sub/v0");
testFindVirtual(SubExample.class, IntExample.class, void.class, "Sub/v0");
testFindVirtual(SubExample.class, SubExample.class, void.class, "Sub/pkg_v0");
testFindVirtual(SubExample.class, Example.class, void.class, "Sub/pkg_v0");
testFindVirtual(Example.class, IntExample.class, void.class, "v0");
testFindVirtual(IntExample.Impl.class, IntExample.class, void.class, "Int/v0");
}
@Test
public void testFindVirtualClone() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindVirtualClone0);
}
public void testFindVirtualClone0() throws Throwable {
if (CAN_SKIP_WORKING) return;
// test some ad hoc system methods
testFindVirtual(false, PUBLIC, Object.class, Object.class, "clone");
// ##### FIXME - disable tests for clone until we figure out how they should work with modules
/*
testFindVirtual(true, PUBLIC, Object[].class, Object.class, "clone");
testFindVirtual(true, PUBLIC, int[].class, Object.class, "clone");
for (Class<?> cls : new Class<?>[]{ boolean[].class, long[].class, float[].class, char[].class })
testFindVirtual(true, PUBLIC, cls, Object.class, "clone");
*/
}
void testFindVirtual(Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
Class<?> rcvc = defc;
testFindVirtual(rcvc, defc, ret, name, params);
}
void testFindVirtual(Class<?> rcvc, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
for (Object[] ac : accessCases(defc, name)) {
testFindVirtual((Boolean)ac[0], (Lookup)ac[1], rcvc, defc, ret, name, params);
}
}
void testFindVirtual(Lookup lookup, Class<?> rcvc, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
testFindVirtual(true, lookup, rcvc, defc, ret, name, params);
}
void testFindVirtual(boolean positive, Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
testFindVirtual(positive, lookup, defc, defc, ret, name, params);
}
void testFindVirtual(boolean positive, Lookup lookup, Class<?> rcvc, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
countTest(positive);
String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
MethodType type = MethodType.methodType(ret, params);
MethodHandle target = null;
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
target = maybeMoveIn(lookup, defc).findVirtual(defc, methodName, type);
} catch (ReflectiveOperationException ex) {
noAccess = ex;
assertExceptionClass(
(name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
? NoSuchMethodException.class
: IllegalAccessException.class,
noAccess);
if (verbosity >= 5) ex.printStackTrace(System.out);
}
if (verbosity >= 3)
System.out.println("findVirtual "+lookup+": "+defc.getName()+"."+name+"/"+type+" => "+target
+(noAccess == null ? "" : " !! "+noAccess));
if (positive && noAccess != null) throw noAccess;
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
Class<?> selfc = defc;
// predict receiver type narrowing:
if (lookup == SUBCLASS &&
name.contains("pro_") &&
selfc.isAssignableFrom(lookup.lookupClass())) {
selfc = lookup.lookupClass();
if (name.startsWith("Pub/")) name = "Rem/"+name.substring(4);
}
Class<?>[] paramsWithSelf = cat(array(Class[].class, (Class)selfc), params);
MethodType typeWithSelf = MethodType.methodType(ret, paramsWithSelf);
assertEquals(typeWithSelf, target.type());
assertNameStringContains(target, methodName);
Object[] argsWithSelf = randomArgs(paramsWithSelf);
if (selfc.isAssignableFrom(rcvc) && rcvc != selfc) argsWithSelf[0] = randomArg(rcvc);
printCalled(target, name, argsWithSelf);
Object res = target.invokeWithArguments(argsWithSelf);
if (Example.class.isAssignableFrom(defc) || IntExample.class.isAssignableFrom(defc)) {
assertCalled(name, argsWithSelf);
} else if (name.equals("clone")) {
// Ad hoc method call outside Example. For Object[].clone.
printCalled(target, name, argsWithSelf);
assertEquals(MethodType.methodType(Object.class, rcvc), target.type());
Object orig = argsWithSelf[0];
assertEquals(orig.getClass(), res.getClass());
if (res instanceof Object[])
assertArrayEquals((Object[])res, (Object[])argsWithSelf[0]);
assert(Arrays.deepEquals(new Object[]{res}, new Object[]{argsWithSelf[0]}));
} else {
assert(false) : Arrays.asList(positive, lookup, rcvc, defc, ret, name, deepToString(params));
}
if (verbosity >= 1)
System.out.print(':');
}
@Test
public void testFindSpecial() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindSpecial0);
}
public void testFindSpecial0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findSpecial");
testFindSpecial(SubExample.class, Example.class, void.class, false, "v0");
testFindSpecial(SubExample.class, Example.class, void.class, false, "pkg_v0");
testFindSpecial(RemoteExample.class, PubExample.class, void.class, false, "Pub/pro_v0");
testFindSpecial(Example.class, IntExample.class, void.class, true, "vd");
// Do some negative testing:
for (Lookup lookup : new Lookup[]{ PRIVATE, EXAMPLE, PACKAGE, PUBLIC }) {
testFindSpecial(false, lookup, Object.class, Example.class, void.class, "v0");
testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "bogus");
testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "<init>", int.class);
testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "<init>", Void.class);
testFindSpecial(false, lookup, SubExample.class, Example.class, void.class, "s0");
testFindSpecial(false, lookup, Example.class, IntExample.class, void.class, "v0");
}
}
void testFindSpecial(Class<?> specialCaller,
Class<?> defc, Class<?> ret, boolean dflt, String name, Class<?>... params) throws Throwable {
if (specialCaller == RemoteExample.class) {
testFindSpecial(false, EXAMPLE, specialCaller, defc, ret, name, params);
testFindSpecial(false, PRIVATE, specialCaller, defc, ret, name, params);
testFindSpecial(false, PACKAGE, specialCaller, defc, ret, name, params);
testFindSpecial(true, SUBCLASS, specialCaller, defc, ret, name, params);
testFindSpecial(false, PUBLIC, specialCaller, defc, ret, name, params);
return;
}
testFindSpecial(true, EXAMPLE, specialCaller, defc, ret, name, params);
testFindSpecial(true, PRIVATE, specialCaller, defc, ret, name, params);
testFindSpecial(false || dflt, PACKAGE, specialCaller, defc, ret, name, params);
testFindSpecial(false, SUBCLASS, specialCaller, defc, ret, name, params);
testFindSpecial(false, PUBLIC, specialCaller, defc, ret, name, params);
}
void testFindSpecial(boolean positive, Lookup lookup, Class<?> specialCaller,
Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
countTest(positive);
String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
MethodType type = MethodType.methodType(ret, params);
Lookup specialLookup = maybeMoveIn(lookup, specialCaller);
boolean specialAccessOK = (specialLookup.lookupClass() == specialCaller &&
(specialLookup.lookupModes() & Lookup.PRIVATE) != 0);
MethodHandle target = null;
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
if (verbosity >= 5) System.out.println(" lookup => "+specialLookup);
target = specialLookup.findSpecial(defc, methodName, type, specialCaller);
} catch (ReflectiveOperationException ex) {
noAccess = ex;
assertExceptionClass(
(!specialAccessOK) // this check should happen first
? IllegalAccessException.class
: (name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
? NoSuchMethodException.class
: IllegalAccessException.class,
noAccess);
if (verbosity >= 5) ex.printStackTrace(System.out);
}
if (verbosity >= 3)
System.out.println("findSpecial from "+specialCaller.getName()+" to "+defc.getName()+"."+name+"/"+type+" => "+target
+(target == null ? "" : target.type())
+(noAccess == null ? "" : " !! "+noAccess));
if (positive && noAccess != null) throw noAccess;
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
assertEquals(specialCaller, target.type().parameterType(0));
assertEquals(type, target.type().dropParameterTypes(0,1));
Class<?>[] paramsWithSelf = cat(array(Class[].class, (Class)specialCaller), params);
MethodType typeWithSelf = MethodType.methodType(ret, paramsWithSelf);
assertNameStringContains(target, methodName);
Object[] args = randomArgs(paramsWithSelf);
printCalled(target, name, args);
target.invokeWithArguments(args);
assertCalled(name, args);
}
@Test
public void testFindConstructor() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindConstructor0);
}
public void testFindConstructor0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findConstructor");
testFindConstructor(true, EXAMPLE, Example.class);
testFindConstructor(true, EXAMPLE, Example.class, int.class);
testFindConstructor(true, EXAMPLE, Example.class, int.class, int.class);
testFindConstructor(true, EXAMPLE, Example.class, int.class, long.class);
testFindConstructor(true, EXAMPLE, Example.class, int.class, float.class);
testFindConstructor(true, EXAMPLE, Example.class, int.class, double.class);
testFindConstructor(true, EXAMPLE, Example.class, String.class);
testFindConstructor(true, EXAMPLE, Example.class, int.class, int.class, int.class);
testFindConstructor(true, EXAMPLE, Example.class, int.class, int.class, int.class, int.class);
}
void testFindConstructor(boolean positive, Lookup lookup,
Class<?> defc, Class<?>... params) throws Throwable {
countTest(positive);
MethodType type = MethodType.methodType(void.class, params);
MethodHandle target = null;
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" <init>"+type);
target = lookup.findConstructor(defc, type);
} catch (ReflectiveOperationException ex) {
noAccess = ex;
assertTrue(noAccess.getClass().getName(), noAccess instanceof IllegalAccessException);
}
if (verbosity >= 3)
System.out.println("findConstructor "+defc.getName()+".<init>/"+type+" => "+target
+(target == null ? "" : target.type())
+(noAccess == null ? "" : " !! "+noAccess));
if (positive && noAccess != null) throw noAccess;
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
assertEquals(type.changeReturnType(defc), target.type());
Object[] args = randomArgs(params);
printCalled(target, defc.getSimpleName(), args);
Object obj = target.invokeWithArguments(args);
if (!(defc == Example.class && params.length < 2))
assertCalled(defc.getSimpleName()+".<init>", args);
assertTrue("instance of "+defc.getName(), defc.isInstance(obj));
}
@Test
public void testBind() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testBind0);
}
public void testBind0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("bind");
testBind(Example.class, void.class, "v0");
testBind(Example.class, void.class, "pkg_v0");
testBind(Example.class, void.class, "pri_v0");
testBind(Example.class, Object.class, "v1", Object.class);
testBind(Example.class, Object.class, "v2", Object.class, Object.class);
testBind(Example.class, Object.class, "v2", Object.class, int.class);
testBind(Example.class, Object.class, "v2", int.class, Object.class);
testBind(Example.class, Object.class, "v2", int.class, int.class);
testBind(false, PRIVATE, Example.class, void.class, "bogus");
testBind(false, PRIVATE, Example.class, void.class, "<init>", int.class);
testBind(false, PRIVATE, Example.class, void.class, "<init>", Void.class);
testBind(SubExample.class, void.class, "Sub/v0");
testBind(SubExample.class, void.class, "Sub/pkg_v0");
testBind(IntExample.Impl.class, void.class, "Int/v0");
}
void testBind(Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
for (Object[] ac : accessCases(defc, name)) {
testBind((Boolean)ac[0], (Lookup)ac[1], defc, ret, name, params);
}
}
void testBind(boolean positive, Lookup lookup, Class<?> defc, Class<?> ret, String name, Class<?>... params) throws Throwable {
countTest(positive);
String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
MethodType type = MethodType.methodType(ret, params);
Object receiver = randomArg(defc);
MethodHandle target = null;
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
target = maybeMoveIn(lookup, defc).bind(receiver, methodName, type);
} catch (ReflectiveOperationException ex) {
noAccess = ex;
assertExceptionClass(
(name.contains("bogus") || INIT_REF_CAUSES_NSME && name.contains("<init>"))
? NoSuchMethodException.class
: IllegalAccessException.class,
noAccess);
if (verbosity >= 5) ex.printStackTrace(System.out);
}
if (verbosity >= 3)
System.out.println("bind "+receiver+"."+name+"/"+type+" => "+target
+(noAccess == null ? "" : " !! "+noAccess));
if (positive && noAccess != null) throw noAccess;
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
assertEquals(type, target.type());
Object[] args = randomArgs(params);
printCalled(target, name, args);
target.invokeWithArguments(args);
Object[] argsWithReceiver = cat(array(Object[].class, receiver), args);
assertCalled(name, argsWithReceiver);
if (verbosity >= 1)
System.out.print(':');
}
@Test
public void testUnreflect() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testUnreflect0);
}
public void testUnreflect0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("unreflect");
testUnreflect(Example.class, true, void.class, "s0");
testUnreflect(Example.class, true, void.class, "pro_s0");
testUnreflect(Example.class, true, void.class, "pkg_s0");
testUnreflect(Example.class, true, void.class, "pri_s0");
testUnreflect(Example.class, true, Object.class, "s1", Object.class);
testUnreflect(Example.class, true, Object.class, "s2", int.class);
testUnreflect(Example.class, true, Object.class, "s3", long.class);
testUnreflect(Example.class, true, Object.class, "s4", int.class, int.class);
testUnreflect(Example.class, true, Object.class, "s5", long.class, int.class);
testUnreflect(Example.class, true, Object.class, "s6", int.class, long.class);
testUnreflect(Example.class, false, void.class, "v0");
testUnreflect(Example.class, false, void.class, "pkg_v0");
testUnreflect(Example.class, false, void.class, "pri_v0");
testUnreflect(Example.class, false, Object.class, "v1", Object.class);
testUnreflect(Example.class, false, Object.class, "v2", Object.class, Object.class);
testUnreflect(Example.class, false, Object.class, "v2", Object.class, int.class);
testUnreflect(Example.class, false, Object.class, "v2", int.class, Object.class);
testUnreflect(Example.class, false, Object.class, "v2", int.class, int.class);
// Test a public final member in another package:
testUnreflect(RemoteExample.class, false, void.class, "Rem/fin_v0");
}
void testUnreflect(Class<?> defc, boolean isStatic, Class<?> ret, String name, Class<?>... params) throws Throwable {
for (Object[] ac : accessCases(defc, name)) {
testUnreflectMaybeSpecial(null, (Boolean)ac[0], (Lookup)ac[1], defc, (isStatic ? null : defc), ret, name, params);
}
}
void testUnreflect(Class<?> defc, Class<?> rcvc, Class<?> ret, String name, Class<?>... params) throws Throwable {
for (Object[] ac : accessCases(defc, name)) {
testUnreflectMaybeSpecial(null, (Boolean)ac[0], (Lookup)ac[1], defc, rcvc, ret, name, params);
}
}
void testUnreflectMaybeSpecial(Class<?> specialCaller,
boolean positive, Lookup lookup,
Class<?> defc, Class<?> rcvc, Class<?> ret, String name, Class<?>... params) throws Throwable {
countTest(positive);
String methodName = name.substring(1 + name.indexOf('/')); // foo/bar => foo
MethodType type = MethodType.methodType(ret, params);
Lookup specialLookup = (specialCaller != null ? maybeMoveIn(lookup, specialCaller) : null);
boolean specialAccessOK = (specialCaller != null &&
specialLookup.lookupClass() == specialCaller &&
(specialLookup.lookupModes() & Lookup.PRIVATE) != 0);
Method rmethod = defc.getDeclaredMethod(methodName, params);
MethodHandle target = null;
Exception noAccess = null;
boolean isStatic = (rcvc == null);
boolean isSpecial = (specialCaller != null);
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
if (isSpecial)
target = specialLookup.unreflectSpecial(rmethod, specialCaller);
else
target = maybeMoveIn(lookup, defc).unreflect(rmethod);
} catch (ReflectiveOperationException ex) {
noAccess = ex;
assertExceptionClass(
IllegalAccessException.class, // NSME is impossible, since it was already reflected
noAccess);
if (verbosity >= 5) ex.printStackTrace(System.out);
}
if (verbosity >= 3)
System.out.println("unreflect"+(isSpecial?"Special":"")+" "+defc.getName()+"."+name+"/"+type
+(!isSpecial ? "" : " specialCaller="+specialCaller)
+( isStatic ? "" : " receiver="+rcvc)
+" => "+target
+(noAccess == null ? "" : " !! "+noAccess));
if (positive && noAccess != null) throw noAccess;
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
assertEquals(isStatic, Modifier.isStatic(rmethod.getModifiers()));
Class<?>[] paramsMaybeWithSelf = params;
if (!isStatic) {
paramsMaybeWithSelf = cat(array(Class[].class, (Class)rcvc), params);
}
MethodType typeMaybeWithSelf = MethodType.methodType(ret, paramsMaybeWithSelf);
if (isStatic) {
assertEquals(typeMaybeWithSelf, target.type());
} else {
if (isSpecial)
assertEquals(specialCaller, target.type().parameterType(0));
else
assertEquals(defc, target.type().parameterType(0));
assertEquals(typeMaybeWithSelf, target.type().changeParameterType(0, rcvc));
}
Object[] argsMaybeWithSelf = randomArgs(paramsMaybeWithSelf);
printCalled(target, name, argsMaybeWithSelf);
target.invokeWithArguments(argsMaybeWithSelf);
assertCalled(name, argsMaybeWithSelf);
if (verbosity >= 1)
System.out.print(':');
}
void testUnreflectSpecial(Class<?> defc, Class<?> rcvc, Class<?> ret, String name, Class<?>... params) throws Throwable {
for (Object[] ac : accessCases(defc, name, true)) {
Class<?> specialCaller = rcvc;
testUnreflectMaybeSpecial(specialCaller, (Boolean)ac[0], (Lookup)ac[1], defc, rcvc, ret, name, params);
}
}
@Test
public void testUnreflectSpecial() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testUnreflectSpecial0);
}
public void testUnreflectSpecial0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("unreflectSpecial");
testUnreflectSpecial(Example.class, Example.class, void.class, "v0");
testUnreflectSpecial(Example.class, SubExample.class, void.class, "v0");
testUnreflectSpecial(Example.class, Example.class, void.class, "pkg_v0");
testUnreflectSpecial(Example.class, SubExample.class, void.class, "pkg_v0");
testUnreflectSpecial(Example.class, Example.class, Object.class, "v2", int.class, int.class);
testUnreflectSpecial(Example.class, SubExample.class, Object.class, "v2", int.class, int.class);
testUnreflectMaybeSpecial(Example.class, false, PRIVATE, Example.class, Example.class, void.class, "s0");
}
@Test
public void testUnreflectGetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testUnreflectGetter0);
}
public void testUnreflectGetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("unreflectGetter");
testGetter(TEST_UNREFLECT);
}
@Test
public void testFindGetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindGetter0);
}
public void testFindGetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findGetter");
testGetter(TEST_FIND_FIELD);
testGetter(TEST_FIND_FIELD | TEST_BOUND);
}
@Test
public void testFindStaticGetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindStaticGetter0);
}
public void testFindStaticGetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findStaticGetter");
testGetter(TEST_FIND_STATIC);
}
public void testGetter(int testMode) throws Throwable {
Lookup lookup = PRIVATE; // FIXME: test more lookups than this one
for (Object[] c : HasFields.testCasesFor(testMode)) {
boolean positive = (c[1] != Error.class);
testGetter(positive, lookup, c[0], c[1], testMode);
if (positive)
testGetter(positive, lookup, c[0], c[1], testMode | TEST_NPE);
}
testGetter(true, lookup,
new Object[]{ true, System.class, "out", java.io.PrintStream.class },
System.out, testMode);
for (int isStaticN = 0; isStaticN <= 1; isStaticN++) {
testGetter(false, lookup,
new Object[]{ (isStaticN != 0), System.class, "bogus", char.class },
null, testMode);
}
}
public void testGetter(boolean positive, MethodHandles.Lookup lookup,
Object fieldRef, Object value, int testMode) throws Throwable {
testAccessor(positive, lookup, fieldRef, value, testMode);
}
public void testAccessor(boolean positive0, MethodHandles.Lookup lookup,
Object fieldRef, Object value, int testMode0) throws Throwable {
if (verbosity >= 4)
System.out.println("testAccessor"+Arrays.deepToString(new Object[]{positive0, lookup, fieldRef, value, testMode0}));
boolean isGetter = ((testMode0 & TEST_SETTER) == 0);
boolean doBound = ((testMode0 & TEST_BOUND) != 0);
boolean testNPE = ((testMode0 & TEST_NPE) != 0);
int testMode = testMode0 & ~(TEST_SETTER | TEST_BOUND | TEST_NPE);
boolean positive = positive0 && !testNPE;
boolean isStatic;
Class<?> fclass;
String fname;
Class<?> ftype;
Field f = (fieldRef instanceof Field ? (Field)fieldRef : null);
if (f != null) {
isStatic = Modifier.isStatic(f.getModifiers());
fclass = f.getDeclaringClass();
fname = f.getName();
ftype = f.getType();
} else {
Object[] scnt = (Object[]) fieldRef;
isStatic = (Boolean) scnt[0];
fclass = (Class<?>) scnt[1];
fname = (String) scnt[2];
ftype = (Class<?>) scnt[3];
try {
f = fclass.getDeclaredField(fname);
} catch (ReflectiveOperationException ex) {
f = null;
}
}
if (!testModeMatches(testMode, isStatic)) return;
if (f == null && testMode == TEST_UNREFLECT) return;
if (testNPE && isStatic) return;
countTest(positive);
MethodType expType;
if (isGetter)
expType = MethodType.methodType(ftype, HasFields.class);
else
expType = MethodType.methodType(void.class, HasFields.class, ftype);
if (isStatic) expType = expType.dropParameterTypes(0, 1);
Exception noAccess = null;
MethodHandle mh;
try {
switch (testMode0 & ~(TEST_BOUND | TEST_NPE)) {
case TEST_UNREFLECT: mh = lookup.unreflectGetter(f); break;
case TEST_FIND_FIELD: mh = lookup.findGetter(fclass, fname, ftype); break;
case TEST_FIND_STATIC: mh = lookup.findStaticGetter(fclass, fname, ftype); break;
case TEST_SETTER|
TEST_UNREFLECT: mh = lookup.unreflectSetter(f); break;
case TEST_SETTER|
TEST_FIND_FIELD: mh = lookup.findSetter(fclass, fname, ftype); break;
case TEST_SETTER|
TEST_FIND_STATIC: mh = lookup.findStaticSetter(fclass, fname, ftype); break;
default:
throw new InternalError("testMode="+testMode);
}
} catch (ReflectiveOperationException ex) {
mh = null;
noAccess = ex;
assertExceptionClass(
(fname.contains("bogus"))
? NoSuchFieldException.class
: IllegalAccessException.class,
noAccess);
if (verbosity >= 5) ex.printStackTrace(System.out);
}
if (verbosity >= 3)
System.out.format("%s%s %s.%s/%s => %s %s%n",
(testMode0 & TEST_UNREFLECT) != 0
? "unreflect"
: "find" + ((testMode0 & TEST_FIND_STATIC) != 0 ? "Static" : ""),
(isGetter ? "Getter" : "Setter"),
fclass.getName(), fname, ftype, mh,
(noAccess == null ? "" : " !! "+noAccess));
// negative test case and expected noAccess, then done.
if (!positive && noAccess != null) return;
// positive test case but found noAccess, then error
if (positive && !testNPE && noAccess != null) throw new RuntimeException(noAccess);
assertEquals(positive0 ? "positive test" : "negative test erroneously passed", positive0, mh != null);
if (!positive && !testNPE) return; // negative access test failed as expected
assertEquals((isStatic ? 0 : 1)+(isGetter ? 0 : 1), mh.type().parameterCount());
assertSame(mh.type(), expType);
//assertNameStringContains(mh, fname); // This does not hold anymore with LFs
HasFields fields = new HasFields();
HasFields fieldsForMH = fields;
if (testNPE) fieldsForMH = null; // perturb MH argument to elicit expected error
if (doBound)
mh = mh.bindTo(fieldsForMH);
Object sawValue;
Class<?> vtype = ftype;
if (ftype != int.class) vtype = Object.class;
if (isGetter) {
mh = mh.asType(mh.type().generic()
.changeReturnType(vtype));
} else {
int last = mh.type().parameterCount() - 1;
mh = mh.asType(mh.type().generic()
.changeReturnType(void.class)
.changeParameterType(last, vtype));
}
if (f != null && f.getDeclaringClass() == HasFields.class) {
assertEquals(f.get(fields), value); // clean to start with
}
Throwable caughtEx = null;
// non-final field and setAccessible(true) on instance field will have write access
boolean writeAccess = !Modifier.isFinal(f.getModifiers()) ||
(!Modifier.isStatic(f.getModifiers()) && f.isAccessible());
if (isGetter) {
Object expValue = value;
for (int i = 0; i <= 1; i++) {
sawValue = null; // make DA rules happy under try/catch
try {
if (isStatic || doBound) {
if (ftype == int.class)
sawValue = (int) mh.invokeExact(); // do these exactly
else
sawValue = mh.invokeExact();
} else {
if (ftype == int.class)
sawValue = (int) mh.invokeExact((Object) fieldsForMH);
else
sawValue = mh.invokeExact((Object) fieldsForMH);
}
} catch (RuntimeException ex) {
if (ex instanceof NullPointerException && testNPE) {
caughtEx = ex;
break;
}
}
assertEquals(sawValue, expValue);
if (f != null && f.getDeclaringClass() == HasFields.class && writeAccess) {
Object random = randomArg(ftype);
f.set(fields, random);
expValue = random;
} else {
break;
}
}
} else {
for (int i = 0; i <= 1; i++) {
Object putValue = randomArg(ftype);
try {
if (isStatic || doBound) {
if (ftype == int.class)
mh.invokeExact((int)putValue); // do these exactly
else
mh.invokeExact(putValue);
} else {
if (ftype == int.class)
mh.invokeExact((Object) fieldsForMH, (int)putValue);
else
mh.invokeExact((Object) fieldsForMH, putValue);
}
} catch (RuntimeException ex) {
if (ex instanceof NullPointerException && testNPE) {
caughtEx = ex;
break;
}
}
if (f != null && f.getDeclaringClass() == HasFields.class) {
assertEquals(f.get(fields), putValue);
}
}
}
if (f != null && f.getDeclaringClass() == HasFields.class && writeAccess) {
f.set(fields, value); // put it back if it has write access
}
if (testNPE) {
if (caughtEx == null || !(caughtEx instanceof NullPointerException))
throw new RuntimeException("failed to catch NPE exception"+(caughtEx == null ? " (caughtEx=null)" : ""), caughtEx);
caughtEx = null; // nullify expected exception
}
if (caughtEx != null) {
throw new RuntimeException("unexpected exception", caughtEx);
}
}
@Test
public void testUnreflectSetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testUnreflectSetter0);
}
public void testUnreflectSetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("unreflectSetter");
testSetter(TEST_UNREFLECT);
}
@Test
public void testFindSetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindSetter0);
}
public void testFindSetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findSetter");
testSetter(TEST_FIND_FIELD);
testSetter(TEST_FIND_FIELD | TEST_BOUND);
}
@Test
public void testFindStaticSetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFindStaticSetter0);
}
public void testFindStaticSetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("findStaticSetter");
testSetter(TEST_FIND_STATIC);
}
public void testSetter(int testMode) throws Throwable {
Lookup lookup = PRIVATE; // FIXME: test more lookups than this one
startTest("testSetter");
for (Object[] c : HasFields.testCasesFor(testMode|TEST_SETTER)) {
boolean positive = (c[1] != Error.class);
testSetter(positive, lookup, c[0], c[1], testMode);
if (positive)
testSetter(positive, lookup, c[0], c[1], testMode | TEST_NPE);
}
for (int isStaticN = 0; isStaticN <= 1; isStaticN++) {
testSetter(false, lookup,
new Object[]{ (isStaticN != 0), System.class, "bogus", char.class },
null, testMode);
}
}
public void testSetter(boolean positive, MethodHandles.Lookup lookup,
Object fieldRef, Object value, int testMode) throws Throwable {
testAccessor(positive, lookup, fieldRef, value, testMode | TEST_SETTER);
}
@Test
public void testArrayElementGetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testArrayElementGetter0);
}
public void testArrayElementGetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("arrayElementGetter");
testArrayElementGetterSetter(false);
}
@Test
public void testArrayElementSetter() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testArrayElementSetter0);
}
public void testArrayElementSetter0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("arrayElementSetter");
testArrayElementGetterSetter(true);
}
private static final int TEST_ARRAY_NONE = 0, TEST_ARRAY_NPE = 1, TEST_ARRAY_OOB = 2, TEST_ARRAY_ASE = 3;
public void testArrayElementGetterSetter(boolean testSetter) throws Throwable {
testArrayElementGetterSetter(testSetter, TEST_ARRAY_NONE);
}
@Test
public void testArrayElementErrors() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testArrayElementErrors0);
}
public void testArrayElementErrors0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("arrayElementErrors");
testArrayElementGetterSetter(false, TEST_ARRAY_NPE);
testArrayElementGetterSetter(true, TEST_ARRAY_NPE);
testArrayElementGetterSetter(false, TEST_ARRAY_OOB);
testArrayElementGetterSetter(true, TEST_ARRAY_OOB);
testArrayElementGetterSetter(new Object[10], true, TEST_ARRAY_ASE);
testArrayElementGetterSetter(new Example[10], true, TEST_ARRAY_ASE);
testArrayElementGetterSetter(new IntExample[10], true, TEST_ARRAY_ASE);
}
public void testArrayElementGetterSetter(boolean testSetter, int negTest) throws Throwable {
testArrayElementGetterSetter(new String[10], testSetter, negTest);
testArrayElementGetterSetter(new Iterable<?>[10], testSetter, negTest);
testArrayElementGetterSetter(new Example[10], testSetter, negTest);
testArrayElementGetterSetter(new IntExample[10], testSetter, negTest);
testArrayElementGetterSetter(new Object[10], testSetter, negTest);
testArrayElementGetterSetter(new boolean[10], testSetter, negTest);
testArrayElementGetterSetter(new byte[10], testSetter, negTest);
testArrayElementGetterSetter(new char[10], testSetter, negTest);
testArrayElementGetterSetter(new short[10], testSetter, negTest);
testArrayElementGetterSetter(new int[10], testSetter, negTest);
testArrayElementGetterSetter(new float[10], testSetter, negTest);
testArrayElementGetterSetter(new long[10], testSetter, negTest);
testArrayElementGetterSetter(new double[10], testSetter, negTest);
}
public void testArrayElementGetterSetter(Object array, boolean testSetter, int negTest) throws Throwable {
boolean positive = (negTest == TEST_ARRAY_NONE);
int length = Array.getLength(array);
Class<?> arrayType = array.getClass();
Class<?> elemType = arrayType.getComponentType();
Object arrayToMH = array;
// this stanza allows negative tests to make argument perturbations:
switch (negTest) {
case TEST_ARRAY_NPE:
arrayToMH = null;
break;
case TEST_ARRAY_OOB:
assert(length > 0);
arrayToMH = Array.newInstance(elemType, 0);
break;
case TEST_ARRAY_ASE:
assert(testSetter && !elemType.isPrimitive());
if (elemType == Object.class)
arrayToMH = new StringBuffer[length]; // very random subclass of Object!
else if (elemType == Example.class)
arrayToMH = new SubExample[length];
else if (elemType == IntExample.class)
arrayToMH = new SubIntExample[length];
else
return; // can't make an ArrayStoreException test
assert(arrayType.isInstance(arrayToMH))
: Arrays.asList(arrayType, arrayToMH.getClass(), testSetter, negTest);
break;
}
countTest(positive);
if (verbosity > 2) System.out.println("array type = "+array.getClass().getComponentType().getName()+"["+length+"]"+(positive ? "" : " negative test #"+negTest+" using "+Arrays.deepToString(new Object[]{arrayToMH})));
MethodType expType = !testSetter
? MethodType.methodType(elemType, arrayType, int.class)
: MethodType.methodType(void.class, arrayType, int.class, elemType);
MethodHandle mh = !testSetter
? MethodHandles.arrayElementGetter(arrayType)
: MethodHandles.arrayElementSetter(arrayType);
assertSame(mh.type(), expType);
if (elemType != int.class && elemType != boolean.class) {
MethodType gtype = mh.type().generic().changeParameterType(1, int.class);
if (testSetter) gtype = gtype.changeReturnType(void.class);
mh = mh.asType(gtype);
}
Object sawValue, expValue;
List<Object> model = array2list(array);
Throwable caughtEx = null;
for (int i = 0; i < length; i++) {
// update array element
Object random = randomArg(elemType);
model.set(i, random);
if (testSetter) {
try {
if (elemType == int.class)
mh.invokeExact((int[]) arrayToMH, i, (int)random);
else if (elemType == boolean.class)
mh.invokeExact((boolean[]) arrayToMH, i, (boolean)random);
else
mh.invokeExact(arrayToMH, i, random);
} catch (RuntimeException ex) {
caughtEx = ex;
break;
}
assertEquals(model, array2list(array));
} else {
Array.set(array, i, random);
}
if (verbosity >= 5) {
List<Object> array2list = array2list(array);
System.out.println("a["+i+"]="+random+" => "+array2list);
if (!array2list.equals(model))
System.out.println("*** != "+model);
}
// observe array element
sawValue = Array.get(array, i);
if (!testSetter) {
expValue = sawValue;
try {
if (elemType == int.class)
sawValue = (int) mh.invokeExact((int[]) arrayToMH, i);
else if (elemType == boolean.class)
sawValue = (boolean) mh.invokeExact((boolean[]) arrayToMH, i);
else
sawValue = mh.invokeExact(arrayToMH, i);
} catch (RuntimeException ex) {
caughtEx = ex;
break;
}
assertEquals(sawValue, expValue);
assertEquals(model, array2list(array));
}
}
if (!positive) {
if (caughtEx == null)
throw new RuntimeException("failed to catch exception for negTest="+negTest);
// test the kind of exception
Class<?> reqType = null;
switch (negTest) {
case TEST_ARRAY_ASE: reqType = ArrayStoreException.class; break;
case TEST_ARRAY_OOB: reqType = ArrayIndexOutOfBoundsException.class; break;
case TEST_ARRAY_NPE: reqType = NullPointerException.class; break;
default: assert(false);
}
if (reqType.isInstance(caughtEx)) {
caughtEx = null; // nullify expected exception
}
}
if (caughtEx != null) {
throw new RuntimeException("unexpected exception", caughtEx);
}
}
List<Object> array2list(Object array) {
int length = Array.getLength(array);
ArrayList<Object> model = new ArrayList<>(length);
for (int i = 0; i < length; i++)
model.add(Array.get(array, i));
return model;
}
@Test
public void testConvertArguments() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testConvertArguments0);
}
public void testConvertArguments0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("convertArguments");
testConvert(Callee.ofType(1), null, "id", int.class);
testConvert(Callee.ofType(1), null, "id", String.class);
testConvert(Callee.ofType(1), null, "id", Integer.class);
testConvert(Callee.ofType(1), null, "id", short.class);
testConvert(Callee.ofType(1), null, "id", char.class);
testConvert(Callee.ofType(1), null, "id", byte.class);
}
void testConvert(MethodHandle id, Class<?> rtype, String name, Class<?>... params) throws Throwable {
testConvert(true, id, rtype, name, params);
}
void testConvert(boolean positive,
MethodHandle id, Class<?> rtype, String name, Class<?>... params) throws Throwable {
countTest(positive);
MethodType idType = id.type();
if (rtype == null) rtype = idType.returnType();
for (int i = 0; i < params.length; i++) {
if (params[i] == null) params[i] = idType.parameterType(i);
}
// simulate the pairwise conversion
MethodType newType = MethodType.methodType(rtype, params);
Object[] args = randomArgs(newType.parameterArray());
Object[] convArgs = args.clone();
for (int i = 0; i < args.length; i++) {
Class<?> src = newType.parameterType(i);
Class<?> dst = idType.parameterType(i);
if (src != dst)
convArgs[i] = castToWrapper(convArgs[i], dst);
}
Object convResult = id.invokeWithArguments(convArgs);
{
Class<?> dst = newType.returnType();
Class<?> src = idType.returnType();
if (src != dst)
convResult = castToWrapper(convResult, dst);
}
MethodHandle target = null;
RuntimeException error = null;
try {
target = id.asType(newType);
} catch (WrongMethodTypeException ex) {
error = ex;
}
if (verbosity >= 3)
System.out.println("convert "+id+ " to "+newType+" => "+target
+(error == null ? "" : " !! "+error));
if (positive && error != null) throw error;
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
assertEquals(newType, target.type());
printCalled(target, id.toString(), args);
Object result = target.invokeWithArguments(args);
assertCalled(name, convArgs);
assertEquals(convResult, result);
if (verbosity >= 1)
System.out.print(':');
}
@Test
public void testVarargsCollector() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testVarargsCollector0);
}
public void testVarargsCollector0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("varargsCollector");
MethodHandle vac0 = PRIVATE.findStatic(MethodHandlesTest.class, "called",
MethodType.methodType(Object.class, String.class, Object[].class));
vac0 = vac0.bindTo("vac");
MethodHandle vac = vac0.asVarargsCollector(Object[].class);
testConvert(true, vac.asType(MethodType.genericMethodType(0)), null, "vac");
testConvert(true, vac.asType(MethodType.genericMethodType(0)), null, "vac");
for (Class<?> at : new Class<?>[] { Object.class, String.class, Integer.class }) {
testConvert(true, vac.asType(MethodType.genericMethodType(1)), null, "vac", at);
testConvert(true, vac.asType(MethodType.genericMethodType(2)), null, "vac", at, at);
}
}
@Test
public void testFilterReturnValue() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFilterReturnValue0);
}
public void testFilterReturnValue0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("filterReturnValue");
Class<?> classOfVCList = varargsList(1).invokeWithArguments(0).getClass();
assertTrue(List.class.isAssignableFrom(classOfVCList));
for (int nargs = 0; nargs <= 3; nargs++) {
for (Class<?> rtype : new Class<?>[] { Object.class,
List.class,
int.class,
byte.class,
long.class,
CharSequence.class,
String.class }) {
testFilterReturnValue(nargs, rtype);
}
}
}
void testFilterReturnValue(int nargs, Class<?> rtype) throws Throwable {
countTest();
MethodHandle target = varargsList(nargs, rtype);
MethodHandle filter;
if (List.class.isAssignableFrom(rtype) || rtype.isAssignableFrom(List.class))
filter = varargsList(1); // add another layer of list-ness
else
filter = MethodHandles.identity(rtype);
filter = filter.asType(MethodType.methodType(target.type().returnType(), rtype));
Object[] argsToPass = randomArgs(nargs, Object.class);
if (verbosity >= 3)
System.out.println("filter "+target+" to "+rtype.getSimpleName()+" with "+filter);
MethodHandle target2 = MethodHandles.filterReturnValue(target, filter);
if (verbosity >= 4)
System.out.println("filtered target: "+target2);
// Simulate expected effect of filter on return value:
Object unfiltered = target.invokeWithArguments(argsToPass);
Object expected = filter.invokeWithArguments(unfiltered);
if (verbosity >= 4)
System.out.println("unfiltered: "+unfiltered+" : "+unfiltered.getClass().getSimpleName());
if (verbosity >= 4)
System.out.println("expected: "+expected+" : "+expected.getClass().getSimpleName());
Object result = target2.invokeWithArguments(argsToPass);
if (verbosity >= 3)
System.out.println("result: "+result+" : "+result.getClass().getSimpleName());
if (!expected.equals(result))
System.out.println("*** fail at n/rt = "+nargs+"/"+rtype.getSimpleName()+": "+
Arrays.asList(argsToPass)+" => "+result+" != "+expected);
assertEquals(expected, result);
}
@Test
public void testFilterArguments() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFilterArguments0);
}
public void testFilterArguments0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("filterArguments");
for (int nargs = 1; nargs <= 6; nargs++) {
for (int pos = 0; pos < nargs; pos++) {
testFilterArguments(nargs, pos);
}
}
}
void testFilterArguments(int nargs, int pos) throws Throwable {
countTest();
MethodHandle target = varargsList(nargs);
MethodHandle filter = varargsList(1);
filter = filter.asType(filter.type().generic());
Object[] argsToPass = randomArgs(nargs, Object.class);
if (verbosity >= 3)
System.out.println("filter "+target+" at "+pos+" with "+filter);
MethodHandle target2 = MethodHandles.filterArguments(target, pos, filter);
// Simulate expected effect of filter on arglist:
Object[] filteredArgs = argsToPass.clone();
filteredArgs[pos] = filter.invokeExact(filteredArgs[pos]);
List<Object> expected = Arrays.asList(filteredArgs);
Object result = target2.invokeWithArguments(argsToPass);
if (verbosity >= 3)
System.out.println("result: "+result);
if (!expected.equals(result))
System.out.println("*** fail at n/p = "+nargs+"/"+pos+": "+Arrays.asList(argsToPass)+" => "+result+" != "+expected);
assertEquals(expected, result);
}
@Test
public void testCollectArguments() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testCollectArguments0);
}
public void testCollectArguments0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("collectArguments");
testFoldOrCollectArguments(true, false);
}
@Test
public void testFoldArguments() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testFoldArguments0);
CodeCacheOverflowProcessor.runMHTest(this::testFoldArguments1);
}
public void testFoldArguments0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("foldArguments");
testFoldOrCollectArguments(false, false);
}
public void testFoldArguments1() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("foldArguments/pos");
testFoldOrCollectArguments(false, true);
}
void testFoldOrCollectArguments(boolean isCollect, boolean withFoldPos) throws Throwable {
assert !(isCollect && withFoldPos); // exclude illegal argument combination
for (Class<?> lastType : new Class<?>[]{ Object.class, String.class, int.class }) {
for (Class<?> collectType : new Class<?>[]{ Object.class, String.class, int.class, void.class }) {
int maxArity = 10;
if (collectType != String.class) maxArity = 5;
if (lastType != Object.class) maxArity = 4;
for (int nargs = 0; nargs <= maxArity; nargs++) {
ArrayList<Class<?>> argTypes = new ArrayList<>(Collections.nCopies(nargs, Object.class));
int maxMix = 20;
if (collectType != Object.class) maxMix = 0;
Map<Object,Integer> argTypesSeen = new HashMap<>();
for (int mix = 0; mix <= maxMix; mix++) {
if (!mixArgs(argTypes, mix, argTypesSeen)) continue;
for (int collect = 0; collect <= nargs; collect++) {
for (int pos = 0; pos <= nargs - collect; pos++) {
testFoldOrCollectArguments(argTypes, pos, collect, collectType, lastType, isCollect, withFoldPos);
}
}
}
}
}
}
}
boolean mixArgs(List<Class<?>> argTypes, int mix, Map<Object,Integer> argTypesSeen) {
assert(mix >= 0);
if (mix == 0) return true; // no change
if ((mix >>> argTypes.size()) != 0) return false;
for (int i = 0; i < argTypes.size(); i++) {
if (i >= 31) break;
boolean bit = (mix & (1 << i)) != 0;
if (bit) {
Class<?> type = argTypes.get(i);
if (type == Object.class)
type = String.class;
else if (type == String.class)
type = int.class;
else
type = Object.class;
argTypes.set(i, type);
}
}
Integer prev = argTypesSeen.put(new ArrayList<>(argTypes), mix);
if (prev != null) {
if (verbosity >= 4) System.out.println("mix "+prev+" repeated "+mix+": "+argTypes);
return false;
}
if (verbosity >= 3) System.out.println("mix "+mix+" = "+argTypes);
return true;
}
void testFoldOrCollectArguments(List<Class<?>> argTypes, // argument types minus the inserted combineType
int pos, int fold, // position and length of the folded arguments
Class<?> combineType, // type returned from the combiner
Class<?> lastType, // type returned from the target
boolean isCollect,
boolean withFoldPos) throws Throwable {
int nargs = argTypes.size();
if (pos != 0 && !isCollect && !withFoldPos) return; // test MethodHandles.foldArguments(MH,MH) only for pos=0
countTest();
List<Class<?>> combineArgTypes = argTypes.subList(pos, pos + fold);
List<Class<?>> targetArgTypes = new ArrayList<>(argTypes);
if (isCollect) // does target see arg[pos..pos+cc-1]?
targetArgTypes.subList(pos, pos + fold).clear();
if (combineType != void.class)
targetArgTypes.add(pos, combineType);
MethodHandle target = varargsList(targetArgTypes, lastType);
MethodHandle combine = varargsList(combineArgTypes, combineType);
List<Object> argsToPass = Arrays.asList(randomArgs(argTypes));
if (verbosity >= 3)
System.out.println((isCollect ? "collect" : "fold")+" "+target+" with "+combine);
MethodHandle target2;
if (isCollect)
target2 = MethodHandles.collectArguments(target, pos, combine);
else
target2 = withFoldPos ? MethodHandles.foldArguments(target, pos, combine) : MethodHandles.foldArguments(target, combine);
// Simulate expected effect of combiner on arglist:
List<Object> expectedList = new ArrayList<>(argsToPass);
List<Object> argsToFold = expectedList.subList(pos, pos + fold);
if (verbosity >= 3)
System.out.println((isCollect ? "collect" : "fold")+": "+argsToFold+" into "+target2);
Object foldedArgs = combine.invokeWithArguments(argsToFold);
if (isCollect)
argsToFold.clear();
if (combineType != void.class)
argsToFold.add(0, foldedArgs);
Object result = target2.invokeWithArguments(argsToPass);
if (verbosity >= 3)
System.out.println("result: "+result);
Object expected = target.invokeWithArguments(expectedList);
if (!expected.equals(result))
System.out.println("*** fail at n/p/f = "+nargs+"/"+pos+"/"+fold+": "+argsToPass+" => "+result+" != "+expected);
assertEquals(expected, result);
}
@Test
public void testDropArguments() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testDropArguments0);
}
public void testDropArguments0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("dropArguments");
for (int nargs = 0; nargs <= 4; nargs++) {
for (int drop = 1; drop <= 4; drop++) {
for (int pos = 0; pos <= nargs; pos++) {
testDropArguments(nargs, pos, drop);
}
}
}
}
void testDropArguments(int nargs, int pos, int drop) throws Throwable {
countTest();
MethodHandle target = varargsArray(nargs);
Object[] args = randomArgs(target.type().parameterArray());
MethodHandle target2 = MethodHandles.dropArguments(target, pos,
Collections.nCopies(drop, Object.class).toArray(new Class<?>[0]));
List<Object> resList = Arrays.asList(args);
List<Object> argsToDrop = new ArrayList<>(resList);
for (int i = drop; i > 0; i--) {
argsToDrop.add(pos, "blort#"+i);
}
Object res2 = target2.invokeWithArguments(argsToDrop);
Object res2List = Arrays.asList((Object[])res2);
//if (!resList.equals(res2List))
// System.out.println("*** fail at n/p/d = "+nargs+"/"+pos+"/"+drop+": "+argsToDrop+" => "+res2List);
assertEquals(resList, res2List);
}
@Test
public void testGuardWithTest() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testGuardWithTest0);
}
public void testGuardWithTest0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("guardWithTest");
for (int nargs = 0; nargs <= 50; nargs++) {
if (CAN_TEST_LIGHTLY && nargs > 7) break;
testGuardWithTest(nargs, Object.class);
testGuardWithTest(nargs, String.class);
}
}
void testGuardWithTest(int nargs, Class<?> argClass) throws Throwable {
testGuardWithTest(nargs, 0, argClass);
if (nargs <= 5 || nargs % 10 == 3) {
for (int testDrops = 1; testDrops <= nargs; testDrops++)
testGuardWithTest(nargs, testDrops, argClass);
}
}
void testGuardWithTest(int nargs, int testDrops, Class<?> argClass) throws Throwable {
countTest();
int nargs1 = Math.min(3, nargs);
MethodHandle test = PRIVATE.findVirtual(Object.class, "equals", MethodType.methodType(boolean.class, Object.class));
MethodHandle target = PRIVATE.findStatic(MethodHandlesTest.class, "targetIfEquals", MethodType.genericMethodType(nargs1));
MethodHandle fallback = PRIVATE.findStatic(MethodHandlesTest.class, "fallbackIfNotEquals", MethodType.genericMethodType(nargs1));
while (test.type().parameterCount() > nargs)
// 0: test = constant(MISSING_ARG.equals(MISSING_ARG))
// 1: test = lambda (_) MISSING_ARG.equals(_)
test = MethodHandles.insertArguments(test, 0, MISSING_ARG);
if (argClass != Object.class) {
test = changeArgTypes(test, argClass);
target = changeArgTypes(target, argClass);
fallback = changeArgTypes(fallback, argClass);
}
int testArgs = nargs - testDrops;
assert(testArgs >= 0);
test = addTrailingArgs(test, Math.min(testArgs, nargs), argClass);
target = addTrailingArgs(target, nargs, argClass);
fallback = addTrailingArgs(fallback, nargs, argClass);
Object[][] argLists = {
{ },
{ "foo" }, { MethodHandlesTest.MISSING_ARG },
{ "foo", "foo" }, { "foo", "bar" },
{ "foo", "foo", "baz" }, { "foo", "bar", "baz" }
};
for (Object[] argList : argLists) {
Object[] argList1 = argList;
if (argList.length != nargs) {
if (argList.length != nargs1) continue;
argList1 = Arrays.copyOf(argList, nargs);
Arrays.fill(argList1, nargs1, nargs, MethodHandlesTest.MISSING_ARG_2);
}
MethodHandle test1 = test;
if (test1.type().parameterCount() > testArgs) {
int pc = test1.type().parameterCount();
test1 = MethodHandles.insertArguments(test, testArgs, Arrays.copyOfRange(argList1, testArgs, pc));
}
MethodHandle mh = MethodHandles.guardWithTest(test1, target, fallback);
assertEquals(target.type(), mh.type());
boolean equals;
switch (nargs) {
case 0: equals = true; break;
case 1: equals = MethodHandlesTest.MISSING_ARG.equals(argList[0]); break;
default: equals = argList[0].equals(argList[1]); break;
}
String willCall = (equals ? "targetIfEquals" : "fallbackIfNotEquals");
if (verbosity >= 3)
System.out.println(logEntry(willCall, argList));
Object result = mh.invokeWithArguments(argList1);
assertCalled(willCall, argList);
}
}
@Test
public void testGenericLoopCombinator() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testGenericLoopCombinator0);
}
public void testGenericLoopCombinator0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("loop");
// Test as follows:
// * Have an increasing number of loop-local state. Local state type diversity grows with the number.
// * Initializers set the starting value of loop-local state from the corresponding loop argument.
// * For each local state element, there is a predicate - for all state combinations, exercise all predicates.
// * Steps modify each local state element in each iteration.
// * Finalizers group all local state elements into a resulting array. Verify end values.
// * Exercise both pre- and post-checked loops.
// Local state types, start values, predicates, and steps:
// * int a, 0, a < 7, a = a + 1
// * double b, 7.0, b > 0.5, b = b / 2.0
// * String c, "start", c.length <= 9, c = c + a
final Class<?>[] argTypes = new Class<?>[] {int.class, double.class, String.class};
final Object[][] args = new Object[][] {
new Object[]{0 },
new Object[]{0, 7.0 },
new Object[]{0, 7.0, "start"}
};
// These are the expected final state tuples for argument type tuple / predicate combinations, for pre- and
// post-checked loops:
final Object[][] preCheckedResults = new Object[][] {
new Object[]{7 }, // (int) / int
new Object[]{7, 0.0546875 }, // (int,double) / int
new Object[]{5, 0.4375 }, // (int,double) / double
new Object[]{7, 0.0546875, "start1234567"}, // (int,double,String) / int
new Object[]{5, 0.4375, "start1234" }, // (int,double,String) / double
new Object[]{6, 0.109375, "start12345" } // (int,double,String) / String
};
final Object[][] postCheckedResults = new Object[][] {
new Object[]{7 }, // (int) / int
new Object[]{7, 0.109375 }, // (int,double) / int
new Object[]{4, 0.4375 }, // (int,double) / double
new Object[]{7, 0.109375, "start123456"}, // (int,double,String) / int
new Object[]{4, 0.4375, "start123" }, // (int,double,String) / double
new Object[]{5, 0.21875, "start12345" } // (int,double,String) / String
};
final Lookup l = MethodHandles.lookup();
final Class<?> MHT = MethodHandlesTest.class;
final Class<?> B = boolean.class;
final Class<?> I = int.class;
final Class<?> D = double.class;
final Class<?> S = String.class;
final MethodHandle hip = l.findStatic(MHT, "loopIntPred", methodType(B, I));
final MethodHandle hdp = l.findStatic(MHT, "loopDoublePred", methodType(B, I, D));
final MethodHandle hsp = l.findStatic(MHT, "loopStringPred", methodType(B, I, D, S));
final MethodHandle his = l.findStatic(MHT, "loopIntStep", methodType(I, I));
final MethodHandle hds = l.findStatic(MHT, "loopDoubleStep", methodType(D, I, D));
final MethodHandle hss = l.findStatic(MHT, "loopStringStep", methodType(S, I, D, S));
final MethodHandle[] preds = new MethodHandle[] {hip, hdp, hsp};
final MethodHandle[] steps = new MethodHandle[] {his, hds, hss};
for (int nargs = 1, useResultsStart = 0; nargs <= argTypes.length; useResultsStart += nargs++) {
Class<?>[] useArgTypes = Arrays.copyOf(argTypes, nargs, Class[].class);
MethodHandle[] usePreds = Arrays.copyOf(preds, nargs, MethodHandle[].class);
MethodHandle[] useSteps = Arrays.copyOf(steps, nargs, MethodHandle[].class);
Object[] useArgs = args[nargs - 1];
Object[][] usePreCheckedResults = new Object[nargs][];
Object[][] usePostCheckedResults = new Object[nargs][];
System.arraycopy(preCheckedResults, useResultsStart, usePreCheckedResults, 0, nargs);
System.arraycopy(postCheckedResults, useResultsStart, usePostCheckedResults, 0, nargs);
testGenericLoopCombinator(nargs, useArgTypes, usePreds, useSteps, useArgs, usePreCheckedResults,
usePostCheckedResults);
}
}
void testGenericLoopCombinator(int nargs, Class<?>[] argTypes, MethodHandle[] preds, MethodHandle[] steps,
Object[] args, Object[][] preCheckedResults, Object[][] postCheckedResults)
throws Throwable {
List<Class<?>> lArgTypes = Arrays.asList(argTypes);
// Predicate and step handles are passed in as arguments, initializer and finalizer handles are constructed here
// from the available information.
MethodHandle[] inits = new MethodHandle[nargs];
for (int i = 0; i < nargs; ++i) {
MethodHandle h;
// Initializers are meant to return whatever they are passed at a given argument position. This means that
// additional arguments may have to be appended and prepended.
h = MethodHandles.identity(argTypes[i]);
if (i < nargs - 1) {
h = MethodHandles.dropArguments(h, 1, lArgTypes.subList(i + 1, nargs));
}
if (i > 0) {
h = MethodHandles.dropArguments(h, 0, lArgTypes.subList(0, i));
}
inits[i] = h;
}
// Finalizers are all meant to collect all of the loop-local state in a single array and return that. Local
// state is passed before the loop args. Construct such a finalizer by first taking a varargsArray collector for
// the number of local state arguments, and then appending the loop args as to-be-dropped arguments.
MethodHandle[] finis = new MethodHandle[nargs];
MethodHandle genericFini = MethodHandles.dropArguments(
varargsArray(nargs).asType(methodType(Object[].class, lArgTypes)), nargs, lArgTypes);
Arrays.fill(finis, genericFini);
// The predicate and step handles' signatures need to be extended. They currently just accept local state args;
// append possibly missing local state args and loop args using dropArguments.
for (int i = 0; i < nargs; ++i) {
List<Class<?>> additionalLocalStateArgTypes = lArgTypes.subList(i + 1, nargs);
preds[i] = MethodHandles.dropArguments(
MethodHandles.dropArguments(preds[i], i + 1, additionalLocalStateArgTypes), nargs, lArgTypes);
steps[i] = MethodHandles.dropArguments(
MethodHandles.dropArguments(steps[i], i + 1, additionalLocalStateArgTypes), nargs, lArgTypes);
}
// Iterate over all of the predicates, using only one of them at a time.
for (int i = 0; i < nargs; ++i) {
MethodHandle[] usePreds;
if (nargs == 1) {
usePreds = preds;
} else {
// Create an all-null preds array, and only use one predicate in this iteration. The null entries will
// be substituted with true predicates by the loop combinator.
usePreds = new MethodHandle[nargs];
usePreds[i] = preds[i];
}
// Go for it.
if (verbosity >= 3) {
System.out.println("calling loop for argument types " + lArgTypes + " with predicate at index " + i);
if (verbosity >= 5) {
System.out.println("predicates: " + Arrays.asList(usePreds));
}
}
MethodHandle[] preInits = new MethodHandle[nargs + 1];
MethodHandle[] prePreds = new MethodHandle[nargs + 1];
MethodHandle[] preSteps = new MethodHandle[nargs + 1];
MethodHandle[] preFinis = new MethodHandle[nargs + 1];
System.arraycopy(inits, 0, preInits, 1, nargs);
System.arraycopy(usePreds, 0, prePreds, 0, nargs); // preds are offset by 1 for pre-checked loops
System.arraycopy(steps, 0, preSteps, 1, nargs);
System.arraycopy(finis, 0, preFinis, 0, nargs); // finis are also offset by 1 for pre-checked loops
// Convert to clause-major form.
MethodHandle[][] preClauses = new MethodHandle[nargs + 1][4];
MethodHandle[][] postClauses = new MethodHandle[nargs][4];
toClauseMajor(preClauses, preInits, preSteps, prePreds, preFinis);
toClauseMajor(postClauses, inits, steps, usePreds, finis);
MethodHandle pre = MethodHandles.loop(preClauses);
MethodHandle post = MethodHandles.loop(postClauses);
if (verbosity >= 6) {
System.out.println("pre-handle: " + pre);
}
Object[] preResults = (Object[]) pre.invokeWithArguments(args);
if (verbosity >= 4) {
System.out.println("pre-checked: expected " + Arrays.asList(preCheckedResults[i]) + ", actual " +
Arrays.asList(preResults));
}
if (verbosity >= 6) {
System.out.println("post-handle: " + post);
}
Object[] postResults = (Object[]) post.invokeWithArguments(args);
if (verbosity >= 4) {
System.out.println("post-checked: expected " + Arrays.asList(postCheckedResults[i]) + ", actual " +
Arrays.asList(postResults));
}
assertArrayEquals(preCheckedResults[i], preResults);
assertArrayEquals(postCheckedResults[i], postResults);
}
}
static void toClauseMajor(MethodHandle[][] clauses, MethodHandle[] init, MethodHandle[] step, MethodHandle[] pred, MethodHandle[] fini) {
for (int i = 0; i < clauses.length; ++i) {
clauses[i][0] = init[i];
clauses[i][1] = step[i];
clauses[i][2] = pred[i];
clauses[i][3] = fini[i];
}
}
@Test
public void testThrowException() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testThrowException0);
}
public void testThrowException0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("throwException");
testThrowException(int.class, new ClassCastException("testing"));
testThrowException(void.class, new java.io.IOException("testing"));
testThrowException(String.class, new LinkageError("testing"));
}
void testThrowException(Class<?> returnType, Throwable thrown) throws Throwable {
countTest();
Class<? extends Throwable> exType = thrown.getClass();
MethodHandle target = MethodHandles.throwException(returnType, exType);
//System.out.println("throwing with "+target+" : "+thrown);
MethodType expectedType = MethodType.methodType(returnType, exType);
assertEquals(expectedType, target.type());
target = target.asType(target.type().generic());
Throwable caught = null;
try {
Object res = target.invokeExact((Object) thrown);
fail("got "+res+" instead of throwing "+thrown);
} catch (Throwable ex) {
if (ex != thrown) {
if (ex instanceof Error) throw (Error)ex;
if (ex instanceof RuntimeException) throw (RuntimeException)ex;
}
caught = ex;
}
assertSame(thrown, caught);
}
@Test
public void testTryFinally() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testTryFinally0);
}
public void testTryFinally0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("tryFinally");
String inputMessage = "returned";
String augmentedMessage = "augmented";
String thrownMessage = "thrown";
String rethrownMessage = "rethrown";
// Test these cases:
// * target returns, cleanup passes through
// * target returns, cleanup augments
// * target throws, cleanup augments and returns
// * target throws, cleanup augments and rethrows
MethodHandle target = MethodHandles.identity(String.class);
MethodHandle targetThrow = MethodHandles.dropArguments(
MethodHandles.throwException(String.class, Exception.class).bindTo(new Exception(thrownMessage)), 0, String.class);
MethodHandle cleanupPassThrough = MethodHandles.dropArguments(MethodHandles.identity(String.class), 0,
Throwable.class, String.class);
MethodHandle cleanupAugment = MethodHandles.dropArguments(MethodHandles.constant(String.class, augmentedMessage),
0, Throwable.class, String.class, String.class);
MethodHandle cleanupCatch = MethodHandles.dropArguments(MethodHandles.constant(String.class, thrownMessage), 0,
Throwable.class, String.class, String.class);
MethodHandle cleanupThrow = MethodHandles.dropArguments(MethodHandles.throwException(String.class, Exception.class).
bindTo(new Exception(rethrownMessage)), 0, Throwable.class, String.class, String.class);
testTryFinally(target, cleanupPassThrough, inputMessage, inputMessage, false);
testTryFinally(target, cleanupAugment, inputMessage, augmentedMessage, false);
testTryFinally(targetThrow, cleanupCatch, inputMessage, thrownMessage, true);
testTryFinally(targetThrow, cleanupThrow, inputMessage, rethrownMessage, true);
// Test the same cases as above for void targets and cleanups.
MethodHandles.Lookup lookup = MethodHandles.lookup();
Class<?> C = this.getClass();
MethodType targetType = methodType(void.class, String[].class);
MethodType cleanupType = methodType(void.class, Throwable.class, String[].class);
MethodHandle vtarget = lookup.findStatic(C, "vtarget", targetType);
MethodHandle vtargetThrow = lookup.findStatic(C, "vtargetThrow", targetType);
MethodHandle vcleanupPassThrough = lookup.findStatic(C, "vcleanupPassThrough", cleanupType);
MethodHandle vcleanupAugment = lookup.findStatic(C, "vcleanupAugment", cleanupType);
MethodHandle vcleanupCatch = lookup.findStatic(C, "vcleanupCatch", cleanupType);
MethodHandle vcleanupThrow = lookup.findStatic(C, "vcleanupThrow", cleanupType);
testTryFinally(vtarget, vcleanupPassThrough, inputMessage, inputMessage, false);
testTryFinally(vtarget, vcleanupAugment, inputMessage, augmentedMessage, false);
testTryFinally(vtargetThrow, vcleanupCatch, inputMessage, thrownMessage, true);
testTryFinally(vtargetThrow, vcleanupThrow, inputMessage, rethrownMessage, true);
}
void testTryFinally(MethodHandle target, MethodHandle cleanup, String input, String msg, boolean mustCatch)
throws Throwable {
countTest();
MethodHandle tf = MethodHandles.tryFinally(target, cleanup);
String result = null;
boolean isVoid = target.type().returnType() == void.class;
String[] argArray = new String[]{input};
try {
if (isVoid) {
tf.invoke(argArray);
} else {
result = (String) tf.invoke(input);
}
} catch (Throwable t) {
assertTrue(mustCatch);
assertEquals(msg, t.getMessage());
return;
}
assertFalse(mustCatch);
if (isVoid) {
assertEquals(msg, argArray[0]);
} else {
assertEquals(msg, result);
}
}
@Test
public void testAsInterfaceInstance() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testAsInterfaceInstance0);
}
public void testAsInterfaceInstance0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("asInterfaceInstance");
Lookup lookup = MethodHandles.lookup();
// test typical case: Runnable.run
{
countTest();
if (verbosity >= 2) System.out.println("Runnable");
MethodType mt = MethodType.methodType(void.class);
MethodHandle mh = lookup.findStatic(MethodHandlesGeneralTest.class, "runForRunnable", mt);
Runnable proxy = MethodHandleProxies.asInterfaceInstance(Runnable.class, mh);
proxy.run();
assertCalled("runForRunnable");
}
// well known single-name overloaded interface: Appendable.append
{
countTest();
if (verbosity >= 2) System.out.println("Appendable");
ArrayList<List<?>> appendResults = new ArrayList<>();
MethodHandle append = lookup.bind(appendResults, "add", MethodType.methodType(boolean.class, Object.class));
append = append.asType(MethodType.methodType(void.class, List.class)); // specialize the type
MethodHandle asList = lookup.findStatic(Arrays.class, "asList", MethodType.methodType(List.class, Object[].class));
MethodHandle mh = MethodHandles.filterReturnValue(asList, append).asVarargsCollector(Object[].class);
Appendable proxy = MethodHandleProxies.asInterfaceInstance(Appendable.class, mh);
proxy.append("one");
proxy.append("two", 3, 4);
proxy.append('5');
assertEquals(Arrays.asList(Arrays.asList("one"),
Arrays.asList("two", 3, 4),
Arrays.asList('5')),
appendResults);
if (verbosity >= 3) System.out.println("appendResults="+appendResults);
appendResults.clear();
Formatter formatter = new Formatter(proxy);
String fmt = "foo str=%s char='%c' num=%d";
Object[] fmtArgs = { "str!", 'C', 42 };
String expect = String.format(fmt, fmtArgs);
formatter.format(fmt, fmtArgs);
String actual = "";
if (verbosity >= 3) System.out.println("appendResults="+appendResults);
for (List<?> l : appendResults) {
Object x = l.get(0);
switch (l.size()) {
case 1: actual += x; continue;
case 3: actual += ((String)x).substring((int)(Object)l.get(1), (int)(Object)l.get(2)); continue;
}
actual += l;
}
if (verbosity >= 3) System.out.println("expect="+expect);
if (verbosity >= 3) System.out.println("actual="+actual);
assertEquals(expect, actual);
}
// test case of an single name which is overloaded: Fooable.foo(...)
{
if (verbosity >= 2) System.out.println("Fooable");
MethodHandle mh = lookup.findStatic(MethodHandlesGeneralTest.class, "fooForFooable",
MethodType.methodType(Object.class, String.class, Object[].class));
Fooable proxy = MethodHandleProxies.asInterfaceInstance(Fooable.class, mh);
for (Method m : Fooable.class.getDeclaredMethods()) {
countTest();
assertSame("foo", m.getName());
if (verbosity > 3)
System.out.println("calling "+m);
MethodHandle invoker = lookup.unreflect(m);
MethodType mt = invoker.type();
Class<?>[] types = mt.parameterArray();
types[0] = int.class; // placeholder
Object[] args = randomArgs(types);
args[0] = proxy;
if (verbosity > 3)
System.out.println("calling "+m+" on "+Arrays.asList(args));
Object result = invoker.invokeWithArguments(args);
if (verbosity > 4)
System.out.println("result = "+result);
String name = "fooForFooable/"+args[1];
Object[] argTail = Arrays.copyOfRange(args, 2, args.length);
assertCalled(name, argTail);
assertEquals(result, logEntry(name, argTail));
}
}
// test processing of thrown exceptions:
for (Throwable ex : new Throwable[] { new NullPointerException("ok"),
new InternalError("ok"),
new Throwable("fail"),
new Exception("fail"),
new MyCheckedException()
}) {
MethodHandle mh = MethodHandles.throwException(void.class, Throwable.class);
mh = MethodHandles.insertArguments(mh, 0, ex);
WillThrow proxy = MethodHandleProxies.asInterfaceInstance(WillThrow.class, mh);
try {
countTest();
proxy.willThrow();
System.out.println("Failed to throw: "+ex);
assertTrue(false);
} catch (Throwable ex1) {
if (verbosity > 3) {
System.out.println("throw "+ex);
System.out.println("catch "+(ex == ex1 ? "UNWRAPPED" : ex1));
}
if (ex instanceof RuntimeException ||
ex instanceof Error) {
assertSame("must pass unchecked exception out without wrapping", ex, ex1);
} else if (ex instanceof MyCheckedException) {
assertSame("must pass declared exception out without wrapping", ex, ex1);
} else {
assertNotSame("must pass undeclared checked exception with wrapping", ex, ex1);
if (!(ex1 instanceof UndeclaredThrowableException) || ex1.getCause() != ex) {
ex1.printStackTrace(System.out);
}
assertSame(ex, ex1.getCause());
UndeclaredThrowableException utex = (UndeclaredThrowableException) ex1;
}
}
}
// Test error checking on bad interfaces:
for (Class<?> nonSMI : new Class<?>[] { Object.class,
String.class,
CharSequence.class,
java.io.Serializable.class,
PrivateRunnable.class,
Example.class }) {
if (verbosity > 2) System.out.println(nonSMI.getName());
try {
countTest(false);
MethodHandleProxies.asInterfaceInstance(nonSMI, varargsArray(0));
assertTrue("Failed to throw on "+nonSMI.getName(), false);
} catch (IllegalArgumentException ex) {
if (verbosity > 2) System.out.println(nonSMI.getSimpleName()+": "+ex);
// Object: java.lang.IllegalArgumentException:
// not a public interface: java.lang.Object
// String: java.lang.IllegalArgumentException:
// not a public interface: java.lang.String
// CharSequence: java.lang.IllegalArgumentException:
// not a single-method interface: java.lang.CharSequence
// Serializable: java.lang.IllegalArgumentException:
// not a single-method interface: java.io.Serializable
// PrivateRunnable: java.lang.IllegalArgumentException:
// not a public interface: test.java.lang.invoke.MethodHandlesTest$PrivateRunnable
// Example: java.lang.IllegalArgumentException:
// not a public interface: test.java.lang.invoke.MethodHandlesTest$Example
}
}
// Test error checking on interfaces with the wrong method type:
for (Class<?> intfc : new Class<?>[] { Runnable.class /*arity 0*/,
Fooable.class /*arity 1 & 2*/ }) {
int badArity = 1; // known to be incompatible
if (verbosity > 2) System.out.println(intfc.getName());
try {
countTest(false);
MethodHandleProxies.asInterfaceInstance(intfc, varargsArray(badArity));
assertTrue("Failed to throw on "+intfc.getName(), false);
} catch (WrongMethodTypeException ex) {
if (verbosity > 2) System.out.println(intfc.getSimpleName()+": "+ex);
// Runnable: java.lang.invoke.WrongMethodTypeException:
// cannot convert MethodHandle(Object)Object[] to ()void
// Fooable: java.lang.invoke.WrongMethodTypeException:
// cannot convert MethodHandle(Object)Object[] to (Object,String)Object
}
}
}
@Test
public void testInterfaceCast() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testInterfaceCast0);
}
public void testInterfaceCast0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("interfaceCast");
assert( (((Object)"foo") instanceof CharSequence));
assert(!(((Object)"foo") instanceof Iterable));
for (MethodHandle mh : new MethodHandle[]{
MethodHandles.identity(String.class),
MethodHandles.identity(CharSequence.class),
MethodHandles.identity(Iterable.class)
}) {
if (verbosity > 0) System.out.println("-- mh = "+mh);
for (Class<?> ctype : new Class<?>[]{
Object.class, String.class, CharSequence.class,
Number.class, Iterable.class
}) {
if (verbosity > 0) System.out.println("---- ctype = "+ctype.getName());
// doret docast
testInterfaceCast(mh, ctype, false, false);
testInterfaceCast(mh, ctype, true, false);
testInterfaceCast(mh, ctype, false, true);
testInterfaceCast(mh, ctype, true, true);
}
}
}
private static Class<?> i2o(Class<?> c) {
return (c.isInterface() ? Object.class : c);
}
public void testInterfaceCast(MethodHandle mh, Class<?> ctype,
boolean doret, boolean docast) throws Throwable {
MethodHandle mh0 = mh;
if (verbosity > 1)
System.out.println("mh="+mh+", ctype="+ctype.getName()+", doret="+doret+", docast="+docast);
String normalRetVal = "normal return value";
MethodType mt = mh.type();
MethodType mt0 = mt;
if (doret) mt = mt.changeReturnType(ctype);
else mt = mt.changeParameterType(0, ctype);
if (docast) mh = MethodHandles.explicitCastArguments(mh, mt);
else mh = mh.asType(mt);
assertEquals(mt, mh.type());
MethodType mt1 = mt;
// this bit is needed to make the interface types disappear for invokeWithArguments:
mh = MethodHandles.explicitCastArguments(mh, mt.generic());
Class<?>[] step = {
mt1.parameterType(0), // param as passed to mh at first
mt0.parameterType(0), // param after incoming cast
mt0.returnType(), // return value before cast
mt1.returnType(), // return value after outgoing cast
};
// where might a checkCast occur?
boolean[] checkCast = new boolean[step.length];
// the string value must pass each step without causing an exception
if (!docast) {
if (!doret) {
if (step[0] != step[1])
checkCast[1] = true; // incoming value is cast
} else {
if (step[2] != step[3])
checkCast[3] = true; // outgoing value is cast
}
}
boolean expectFail = false;
for (int i = 0; i < step.length; i++) {
Class<?> c = step[i];
if (!checkCast[i]) c = i2o(c);
if (!c.isInstance(normalRetVal)) {
if (verbosity > 3)
System.out.println("expect failure at step "+i+" in "+Arrays.toString(step)+Arrays.toString(checkCast));
expectFail = true;
break;
}
}
countTest(!expectFail);
if (verbosity > 2)
System.out.println("expectFail="+expectFail+", mt="+mt);
Object res;
try {
res = mh.invokeWithArguments(normalRetVal);
} catch (Exception ex) {
res = ex;
}
boolean sawFail = !(res instanceof String);
if (sawFail != expectFail) {
System.out.println("*** testInterfaceCast: mh0 = "+mh0);
System.out.println(" retype using "+(docast ? "explicitCastArguments" : "asType")+" to "+mt+" => "+mh);
System.out.println(" call returned "+res);
System.out.println(" expected "+(expectFail ? "an exception" : normalRetVal));
}
if (!expectFail) {
assertFalse(res.toString(), sawFail);
assertEquals(normalRetVal, res);
} else {
assertTrue(res.toString(), sawFail);
}
}
static Example userMethod(Object o, String s, int i) {
called("userMethod", o, s, i);
return null;
}
@Test
public void testUserClassInSignature() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testUserClassInSignature0);
}
public void testUserClassInSignature0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("testUserClassInSignature");
Lookup lookup = MethodHandles.lookup();
String name; MethodType mt; MethodHandle mh;
Object[] args;
// Try a static method.
name = "userMethod";
mt = MethodType.methodType(Example.class, Object.class, String.class, int.class);
mh = lookup.findStatic(lookup.lookupClass(), name, mt);
assertEquals(mt, mh.type());
assertEquals(Example.class, mh.type().returnType());
args = randomArgs(mh.type().parameterArray());
mh.invokeWithArguments(args);
assertCalled(name, args);
// Try a virtual method.
name = "v2";
mt = MethodType.methodType(Object.class, Object.class, int.class);
mh = lookup.findVirtual(Example.class, name, mt);
assertEquals(mt, mh.type().dropParameterTypes(0,1));
assertTrue(mh.type().parameterList().contains(Example.class));
args = randomArgs(mh.type().parameterArray());
mh.invokeWithArguments(args);
assertCalled(name, args);
}
static void runForRunnable() {
called("runForRunnable");
}
public interface Fooable {
// overloads:
Object foo(Object x, String y);
List<?> foo(String x, int y);
Object foo(String x);
}
static Object fooForFooable(String x, Object... y) {
return called("fooForFooable/"+x, y);
}
@SuppressWarnings("serial") // not really a public API, just a test case
public static class MyCheckedException extends Exception {
}
public interface WillThrow {
void willThrow() throws MyCheckedException;
}
/*non-public*/ interface PrivateRunnable {
public void run();
}
@Test
public void testRunnableProxy() throws Throwable {
CodeCacheOverflowProcessor.runMHTest(this::testRunnableProxy0);
}
public void testRunnableProxy0() throws Throwable {
if (CAN_SKIP_WORKING) return;
startTest("testRunnableProxy");
MethodHandles.Lookup lookup = MethodHandles.lookup();
MethodHandle run = lookup.findStatic(lookup.lookupClass(), "runForRunnable", MethodType.methodType(void.class));
Runnable r = MethodHandleProxies.asInterfaceInstance(Runnable.class, run);
testRunnableProxy(r);
assertCalled("runForRunnable");
}
private static void testRunnableProxy(Runnable r) {
//7058630: JSR 292 method handle proxy violates contract for Object methods
r.run();
Object o = r;
r = null;
boolean eq = (o == o);
int hc = System.identityHashCode(o);
String st = o.getClass().getName() + "@" + Integer.toHexString(hc);
Object expect = Arrays.asList(st, eq, hc);
if (verbosity >= 2) System.out.println("expect st/eq/hc = "+expect);
Object actual = Arrays.asList(o.toString(), o.equals(o), o.hashCode());
if (verbosity >= 2) System.out.println("actual st/eq/hc = "+actual);
assertEquals(expect, actual);
}
}