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ObjectMethods.java
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ObjectMethods.java
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/*
* Copyright (c) 2018, 2021, 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 runtime.valhalla.inlinetypes;
import java.lang.invoke.*;
import test.java.lang.invoke.lib.InstructionHelper;
/*
* @test ObjectMethods
* @summary Check object method implemented by the VM behave with inline types
* @library /test/lib /test/jdk/lib/testlibrary/bytecode /test/jdk/java/lang/invoke/common
* @build jdk.experimental.bytecode.BasicClassBuilder test.java.lang.invoke.lib.InstructionHelper
* @compile -XDallowWithFieldOperator ObjectMethods.java
* @run main/othervm -XX:+UseCompressedClassPointers runtime.valhalla.inlinetypes.ObjectMethods
* @run main/othervm -XX:-UseCompressedClassPointers runtime.valhalla.inlinetypes.ObjectMethods
* @run main/othervm -noverify runtime.valhalla.inlinetypes.ObjectMethods noverify
*/
public class ObjectMethods {
public static void main(String[] args) {
testObjectMethods((args.length > 0 && args[0].equals("noverify")));
}
public static void testObjectMethods(boolean verifierDisabled) {
MyInt val = MyInt.create(7);
MyInt sameVal = MyInt.create(7);
// Exercise all the Object native/VM methods...
if (verifierDisabled) { // Just noverifier...
checkMonitorExit(val);
return;
}
// getClass()
checkGetClass(val, MyInt.ref.class);
//hashCode()/identityHashCode()
checkHashCodes(val, sameVal.hashCode());
// clone()
checkNotCloneable(val);
// synchronized
checkSynchronized(val);
// wait/notify()
checkWait(val);
checkNotify(val);
System.gc();
}
static void checkGetClass(Object val, Class<?> expectedClass) {
Class<?> clazz = val.getClass();
if (clazz == null) {
throw new RuntimeException("getClass return null");
} else if (clazz != expectedClass) {
throw new RuntimeException("getClass (" + clazz + ") doesn't match " + expectedClass);
}
}
// Just check we don't crash the VM
static void checkHashCodes(Object val, int expectedHashCode) {
int hash = val.hashCode();
if (hash != expectedHashCode) {
throw new RuntimeException("Hash code mismatch value: " + hash +
" expected: " + expectedHashCode);
}
hash = System.identityHashCode(val);
if (hash != expectedHashCode) {
throw new RuntimeException("Identity hash code mismatch value: " + hash +
" expected: " + expectedHashCode);
}
}
static void checkNotCloneable(MyInt val) {
boolean sawCnse = false;
try {
val.attemptClone();
} catch (CloneNotSupportedException cnse) {
sawCnse = true;
}
if (!sawCnse) {
throw new RuntimeException("clone() did not fail");
}
// Cloneable inline type checked by "BadInlineTypes" CFP tests
}
static void checkSynchronized(Object val) {
boolean sawImse = false;
try {
synchronized (val) {
throw new IllegalStateException("Unreachable code, reached");
}
} catch (IllegalMonitorStateException imse) {
sawImse = true;
}
if (!sawImse) {
throw new RuntimeException("monitorenter did not fail");
}
// synchronized method modifiers tested by "BadInlineTypes" CFP tests
// jni monitor ops tested by "InlineWithJni"
}
// Check we haven't broken the mismatched monitor block check...
static void checkMonitorExit(Object val) {
boolean sawImse = false;
try {
InstructionHelper.loadCode(MethodHandles.lookup(),
"mismatchedMonitorExit",
MethodType.methodType(Void.TYPE, Object.class),
CODE->{
CODE
.aload(0)
.monitorexit()
.return_();
}).invokeExact(val);
throw new IllegalStateException("Unreachable code, reached");
} catch (Throwable t) {
if (t instanceof IllegalMonitorStateException) {
sawImse = true;
} else {
throw new RuntimeException(t);
}
}
if (!sawImse) {
throw new RuntimeException("monitorexit did not fail");
}
}
static void checkWait(Object val) {
boolean sawImse = false;
try {
val.wait();
} catch (IllegalMonitorStateException imse) {
sawImse = true;
} catch (InterruptedException intExc) {
throw new RuntimeException(intExc);
}
if (!sawImse) {
throw new RuntimeException("wait() did not fail");
}
sawImse = false;
try {
val.wait(1l);
} catch (IllegalMonitorStateException imse) {
sawImse = true;
} catch (InterruptedException intExc) {
throw new RuntimeException(intExc);
}
if (!sawImse) {
throw new RuntimeException("wait() did not fail");
}
sawImse = false;
try {
val.wait(0l, 100);
} catch (IllegalMonitorStateException imse) {
sawImse = true;
} catch (InterruptedException intExc) {
throw new RuntimeException(intExc);
}
if (!sawImse) {
throw new RuntimeException("wait() did not fail");
}
}
static void checkNotify(Object val) {
boolean sawImse = false;
try {
val.notify();
} catch (IllegalMonitorStateException imse) {
sawImse = true;
}
if (!sawImse) {
throw new RuntimeException("notify() did not fail");
}
sawImse = false;
try {
val.notifyAll();
} catch (IllegalMonitorStateException imse) {
sawImse = true;
}
if (!sawImse) {
throw new RuntimeException("notifyAll() did not fail");
}
}
static final primitive class MyInt {
final int value;
private MyInt() { value = 0; }
public static MyInt create(int v) {
MyInt mi = MyInt.default;
mi = __WithField(mi.value, v);
return mi;
}
public Object attemptClone() throws CloneNotSupportedException {
try { // Check it is not possible to clone...
MethodHandles.Lookup lookup = MethodHandles.lookup();
MethodHandle mh = lookup.findVirtual(getClass(),
"clone",
MethodType.methodType(Object.class));
return mh.invokeExact(this);
} catch (Throwable t) {
if (t instanceof CloneNotSupportedException) {
throw (CloneNotSupportedException) t;
}
throw new RuntimeException(t);
}
}
}
}