372 lines
15 KiB
Java
372 lines
15 KiB
Java
/*
|
|
* Copyright (c) 2009, 2024, 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 white-box testing of method handle sub-primitives
|
|
* @modules java.base/java.lang.invoke:open
|
|
* @run junit test.java.lang.invoke.PrivateInvokeTest
|
|
*/
|
|
|
|
package test.java.lang.invoke;
|
|
|
|
import java.lang.invoke.*;
|
|
import static java.lang.invoke.MethodHandles.*;
|
|
import static java.lang.invoke.MethodType.*;
|
|
import java.lang.reflect.*;
|
|
import java.util.ArrayList;
|
|
import java.util.Arrays;
|
|
import org.junit.*;
|
|
import static org.junit.Assert.*;
|
|
|
|
public class PrivateInvokeTest {
|
|
// Utility functions
|
|
private static final Lookup LOOKUP = lookup();
|
|
private static final Class<?> THIS_CLASS = PrivateInvokeTest.class;
|
|
private static final int
|
|
REF_NONE = 0, // null value
|
|
REF_getField = 1,
|
|
REF_getStatic = 2,
|
|
REF_putField = 3,
|
|
REF_putStatic = 4,
|
|
REF_invokeVirtual = 5,
|
|
REF_invokeStatic = 6,
|
|
REF_invokeSpecial = 7,
|
|
REF_newInvokeSpecial = 8,
|
|
REF_invokeInterface = 9,
|
|
REF_LIMIT = 10,
|
|
REF_MH_invokeBasic = REF_NONE;;
|
|
private static final String[] REF_KIND_NAMES = {
|
|
"MH::invokeBasic",
|
|
"REF_getField", "REF_getStatic", "REF_putField", "REF_putStatic",
|
|
"REF_invokeVirtual", "REF_invokeStatic", "REF_invokeSpecial",
|
|
"REF_newInvokeSpecial", "REF_invokeInterface"
|
|
};
|
|
private int verbose;
|
|
//{ verbose = 99; } // for debugging
|
|
{
|
|
String vstr = System.getProperty(THIS_CLASS.getSimpleName()+".verbose");
|
|
if (vstr == null)
|
|
vstr = System.getProperty(THIS_CLASS.getName()+".verbose");
|
|
if (vstr != null) verbose = Integer.parseInt(vstr);
|
|
}
|
|
private static int referenceKind(Method m) {
|
|
if (Modifier.isStatic(m.getModifiers()))
|
|
return REF_invokeStatic;
|
|
else if (m.getDeclaringClass().isInterface())
|
|
return REF_invokeInterface;
|
|
else if (Modifier.isFinal(m.getModifiers()) ||
|
|
Modifier.isFinal(m.getDeclaringClass().getModifiers()))
|
|
return REF_invokeSpecial;
|
|
else
|
|
return REF_invokeVirtual;
|
|
}
|
|
private static MethodType basicType(MethodType mtype) {
|
|
MethodType btype = mtype.erase();
|
|
if (btype.hasPrimitives()) {
|
|
for (int i = -1; i < mtype.parameterCount(); i++) {
|
|
Class<?> type = (i < 0 ? mtype.returnType() : mtype.parameterType(i));
|
|
if (type == boolean.class ||
|
|
type == byte.class ||
|
|
type == char.class ||
|
|
type == short.class) {
|
|
type = int.class;
|
|
if (i < 0)
|
|
btype = btype.changeReturnType(type);
|
|
else
|
|
btype = btype.changeParameterType(i, type);
|
|
}
|
|
}
|
|
}
|
|
return btype;
|
|
}
|
|
private static Method getMethod(Class<?> defc, String name, Class<?>... ptypes) {
|
|
try {
|
|
return defc.getDeclaredMethod(name, ptypes);
|
|
} catch (NoSuchMethodException ex) {
|
|
}
|
|
try {
|
|
return defc.getMethod(name, ptypes);
|
|
} catch (NoSuchMethodException ex) {
|
|
throw new IllegalArgumentException(ex);
|
|
}
|
|
}
|
|
private static MethodHandle unreflect(Method m) {
|
|
try {
|
|
MethodHandle mh = LOOKUP.unreflect(m);
|
|
if (Modifier.isTransient(m.getModifiers()))
|
|
mh = mh.asFixedArity(); // remove varargs wrapper
|
|
return mh;
|
|
} catch (IllegalAccessException ex) {
|
|
throw new IllegalArgumentException(ex);
|
|
}
|
|
}
|
|
private static final Lookup DIRECT_INVOKER_LOOKUP;
|
|
private static final Class<?> MEMBER_NAME_CLASS;
|
|
private static final MethodHandle MH_INTERNAL_MEMBER_NAME;
|
|
private static final MethodHandle MH_DEBUG_STRING;
|
|
static {
|
|
try {
|
|
// This is white box testing. Use reflection to grab private implementation bits.
|
|
String magicName = "IMPL_LOOKUP";
|
|
Field magicLookup = MethodHandles.Lookup.class.getDeclaredField(magicName);
|
|
// This unit test will fail if a security manager is installed.
|
|
magicLookup.setAccessible(true);
|
|
// Forbidden fruit...
|
|
DIRECT_INVOKER_LOOKUP = (Lookup) magicLookup.get(null);
|
|
MEMBER_NAME_CLASS = Class.forName("java.lang.invoke.MemberName", false, MethodHandle.class.getClassLoader());
|
|
MH_INTERNAL_MEMBER_NAME = DIRECT_INVOKER_LOOKUP
|
|
.findVirtual(MethodHandle.class, "internalMemberName", methodType(MEMBER_NAME_CLASS))
|
|
.asType(methodType(Object.class, MethodHandle.class));
|
|
MH_DEBUG_STRING = DIRECT_INVOKER_LOOKUP
|
|
.findVirtual(MethodHandle.class, "debugString", methodType(String.class));
|
|
} catch (ReflectiveOperationException ex) {
|
|
throw new Error(ex);
|
|
}
|
|
}
|
|
private Object internalMemberName(MethodHandle mh) {
|
|
try {
|
|
return MH_INTERNAL_MEMBER_NAME.invokeExact(mh);
|
|
} catch (Throwable ex) {
|
|
throw new Error(ex);
|
|
}
|
|
}
|
|
private String debugString(MethodHandle mh) {
|
|
try {
|
|
return (String) MH_DEBUG_STRING.invokeExact(mh);
|
|
} catch (Throwable ex) {
|
|
throw new Error(ex);
|
|
}
|
|
}
|
|
private static MethodHandle directInvoker(int refKind, MethodType mtype) {
|
|
return directInvoker(REF_KIND_NAMES[refKind], mtype);
|
|
}
|
|
private static MethodHandle directInvoker(String name, MethodType mtype) {
|
|
boolean isStatic;
|
|
mtype = mtype.erase();
|
|
if (name.startsWith("MH::")) {
|
|
isStatic = false;
|
|
name = strip("MH::", name);
|
|
} else if (name.startsWith("REF_")) {
|
|
isStatic = true;
|
|
name = strip("REF_", name);
|
|
if (name.startsWith("invoke"))
|
|
name = "linkTo"+strip("invoke", name);
|
|
mtype = mtype.appendParameterTypes(MEMBER_NAME_CLASS);
|
|
} else {
|
|
throw new AssertionError("name="+name);
|
|
}
|
|
//System.out.println("directInvoker = "+name+mtype);
|
|
try {
|
|
if (isStatic)
|
|
return DIRECT_INVOKER_LOOKUP
|
|
.findStatic(MethodHandle.class, name, mtype);
|
|
else
|
|
return DIRECT_INVOKER_LOOKUP
|
|
.findVirtual(MethodHandle.class, name, mtype);
|
|
} catch (ReflectiveOperationException ex) {
|
|
throw new IllegalArgumentException(ex);
|
|
}
|
|
}
|
|
private Object invokeWithArguments(Method m, Object... args) {
|
|
Object recv = null;
|
|
if (!Modifier.isStatic(m.getModifiers())) {
|
|
recv = args[0];
|
|
args = pop(1, args);
|
|
}
|
|
try {
|
|
return m.invoke(recv, args);
|
|
} catch (IllegalAccessException|IllegalArgumentException|InvocationTargetException ex) {
|
|
throw new IllegalArgumentException(ex);
|
|
}
|
|
}
|
|
private Object invokeWithArguments(MethodHandle mh, Object... args) {
|
|
try {
|
|
return mh.invokeWithArguments(args);
|
|
} catch (Throwable ex) {
|
|
throw new IllegalArgumentException(ex);
|
|
}
|
|
}
|
|
private int counter;
|
|
private Object makeArgument(Class<?> type) {
|
|
final String cname = type.getSimpleName();
|
|
final int n = ++counter;
|
|
final int nn = (n << 10) + 13;
|
|
if (type.isAssignableFrom(String.class)) {
|
|
return "<"+cname+"#"+nn+">";
|
|
}
|
|
if (type == THIS_CLASS) return this.withCounter(nn);
|
|
if (type == Integer.class || type == int.class) return nn;
|
|
if (type == Character.class || type == char.class) return (char)(n % 100+' ');
|
|
if (type == Byte.class || type == byte.class) return (byte)-(n % 100);
|
|
if (type == Long.class || type == long.class) return (long)nn;
|
|
throw new IllegalArgumentException("don't know how to make argument of type: "+type);
|
|
}
|
|
private Object[] makeArguments(Class<?>... ptypes) {
|
|
Object[] args = new Object[ptypes.length];
|
|
for (int i = 0; i < args.length; i++)
|
|
args[i] = makeArgument(ptypes[i]);
|
|
return args;
|
|
}
|
|
private Object[] makeArguments(MethodType mtype) {
|
|
return makeArguments(mtype.parameterArray());
|
|
}
|
|
private Object[] pop(int n, Object[] args) {
|
|
if (n >= 0)
|
|
return Arrays.copyOfRange(args, n, args.length);
|
|
else
|
|
return Arrays.copyOfRange(args, 0, args.length+n);
|
|
}
|
|
private Object[] pushAtFront(Object arg1, Object[] args) {
|
|
Object[] res = new Object[1+args.length];
|
|
res[0] = arg1;
|
|
System.arraycopy(args, 0, res, 1, args.length);
|
|
return res;
|
|
}
|
|
private Object[] pushAtBack(Object[] args, Object argN) {
|
|
Object[] res = new Object[1+args.length];
|
|
System.arraycopy(args, 0, res, 0, args.length);
|
|
res[args.length] = argN;
|
|
return res;
|
|
}
|
|
private static String strip(String prefix, String s) {
|
|
assert(s.startsWith(prefix));
|
|
return s.substring(prefix.length());
|
|
}
|
|
|
|
private final int[] refKindTestCounts = new int[REF_KIND_NAMES.length];
|
|
@After
|
|
public void printCounts() {
|
|
ArrayList<String> zeroes = new ArrayList<>();
|
|
for (int i = 0; i < refKindTestCounts.length; i++) {
|
|
final int count = refKindTestCounts[i];
|
|
final String name = REF_KIND_NAMES[i];
|
|
if (count == 0) {
|
|
if (name != null) zeroes.add(name);
|
|
continue;
|
|
}
|
|
if (verbose >= 0)
|
|
System.out.println("test count for "+name+" : "+count);
|
|
else if (name != null)
|
|
zeroes.add(name);
|
|
}
|
|
if (verbose >= 0)
|
|
System.out.println("test counts zero for "+zeroes);
|
|
}
|
|
|
|
// Test subjects
|
|
public static String makeString(Object x) { return "makeString("+x+")"; }
|
|
public static String dupString(String x) { return "("+x+"+"+x+")"; }
|
|
public static String intString(int x) { return "intString("+x+")"; }
|
|
public static String byteString(byte x) { return "byteString("+x+")"; }
|
|
public static String longString(String x, long y, String z) { return "longString("+x+y+z+")"; }
|
|
|
|
public final String toString() {
|
|
return "<"+getClass().getSimpleName()+"#"+counter+">";
|
|
}
|
|
public final String hello() { return "hello from "+this; }
|
|
private PrivateInvokeTest withCounter(int counter) {
|
|
PrivateInvokeTest res = new PrivateInvokeTest();
|
|
res.counter = counter;
|
|
return res;
|
|
}
|
|
|
|
public static void main(String... av) throws Throwable {
|
|
new PrivateInvokeTest().run();
|
|
}
|
|
public void run() throws Throwable {
|
|
testFirst();
|
|
testInvokeDirect();
|
|
}
|
|
|
|
@Test
|
|
public void testFirst() throws Throwable {
|
|
if (true) return; // nothing here
|
|
try {
|
|
System.out.println("start of testFirst");
|
|
} finally {
|
|
System.out.println("end of testFirst");
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testInvokeDirect() {
|
|
testInvokeDirect(getMethod(THIS_CLASS, "hello"));
|
|
testInvokeDirect(getMethod(Object.class, "toString"));
|
|
testInvokeDirect(getMethod(Comparable.class, "compareTo", Object.class));
|
|
testInvokeDirect(getMethod(THIS_CLASS, "makeString", Object.class));
|
|
testInvokeDirect(getMethod(THIS_CLASS, "dupString", String.class));
|
|
testInvokeDirect(getMethod(THIS_CLASS, "intString", int.class));
|
|
testInvokeDirect(getMethod(THIS_CLASS, "byteString", byte.class));
|
|
testInvokeDirect(getMethod(THIS_CLASS, "longString", String.class, long.class, String.class));
|
|
}
|
|
|
|
void testInvokeDirect(Method m) {
|
|
final int refKind = referenceKind(m);
|
|
testInvokeDirect(m, refKind);
|
|
testInvokeDirect(m, REF_MH_invokeBasic);
|
|
}
|
|
void testInvokeDirect(Method m, int refKind) {
|
|
if (verbose >= 1)
|
|
System.out.println("testInvoke m="+m+" : "+REF_KIND_NAMES[refKind]);
|
|
final MethodHandle mh = unreflect(m);
|
|
Object[] args = makeArguments(mh.type());
|
|
Object res1 = invokeWithArguments(m, args);
|
|
// res1 comes from java.lang.reflect.Method::invoke
|
|
if (verbose >= 1)
|
|
System.out.println("m"+Arrays.asList(args)+" => "+res1);
|
|
// res2 comes from java.lang.invoke.MethodHandle::invoke
|
|
Object res2 = invokeWithArguments(mh, args);
|
|
assertEquals(res1, res2);
|
|
MethodType mtype = mh.type();
|
|
testInvokeVia("DMH invoker", refKind, directInvoker(refKind, mtype), mh, res1, args);
|
|
MethodType etype = mtype.erase();
|
|
if (etype != mtype) {
|
|
// Try a detuned invoker.
|
|
testInvokeVia("erased DMH invoker", refKind, directInvoker(refKind, etype), mh, res1, args);
|
|
}
|
|
MethodType btype = basicType(mtype);
|
|
if (btype != mtype && btype != etype) {
|
|
// Try a detuned invoker.
|
|
testInvokeVia("basic DMH invoker", refKind, directInvoker(refKind, btype), mh, res1, args);
|
|
}
|
|
if (false) {
|
|
// this can crash the JVM
|
|
testInvokeVia("generic DMH invoker", refKind, directInvoker(refKind, mtype.generic()), mh, res1, args);
|
|
}
|
|
refKindTestCounts[refKind] += 1;
|
|
}
|
|
|
|
void testInvokeVia(String kind, int refKind, MethodHandle invoker, MethodHandle mh, Object res1, Object... args) {
|
|
Object[] args1;
|
|
if (refKind == REF_MH_invokeBasic)
|
|
args1 = pushAtFront(mh, args);
|
|
else
|
|
args1 = pushAtBack(args, internalMemberName(mh));
|
|
if (verbose >= 2) {
|
|
System.out.println(kind+" invoker="+invoker+" mh="+debugString(mh)+" args="+Arrays.asList(args1));
|
|
}
|
|
Object res3 = invokeWithArguments(invoker, args1);
|
|
assertEquals(res1, res3);
|
|
}
|
|
}
|