134 lines
5.3 KiB
Java
134 lines
5.3 KiB
Java
/*
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* Copyright (c) 2021, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8266925
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* @summary hidden class members can't be statically invocable
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* @modules java.base/jdk.internal.misc
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* @enablePreview
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* @build java.base/*
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* @run testng StaticInvocableTest
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*/
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import java.lang.classfile.ClassFile;
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import java.lang.constant.ClassDesc;
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import java.lang.constant.MethodTypeDesc;
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import java.lang.invoke.MethodHandle;
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import java.lang.invoke.MethodHandles.Lookup;
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import java.lang.invoke.MethodType;
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import java.lang.invoke.LookupHelper;
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import java.lang.reflect.AccessFlag;
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import org.testng.annotations.Test;
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import static java.lang.classfile.ClassFile.ACC_PUBLIC;
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import static java.lang.classfile.ClassFile.ACC_STATIC;
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import static java.lang.constant.ConstantDescs.CD_Object;
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import static java.lang.constant.ConstantDescs.CD_int;
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import static java.lang.constant.ConstantDescs.INIT_NAME;
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import static java.lang.constant.ConstantDescs.MTD_void;
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public class StaticInvocableTest {
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public static void main(String[] args) throws Throwable {
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StaticInvocableTest test = new StaticInvocableTest();
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test.testJavaLang();
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test.testJavaUtil();
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test.testJdkInternalMisc();
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test.testJavaLangInvoke();
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test.testProhibitedJavaPkg();
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System.out.println("TEST PASSED");
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}
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// Test hidden classes from different packages
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// (see j.l.i.InvokerBytecodeGenerator::isStaticallyInvocable).
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@Test public void testJavaLang() throws Throwable { test("java/lang"); }
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@Test public void testJavaUtil() throws Throwable { test("java/util"); }
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@Test public void testJdkInternalMisc() throws Throwable { test("jdk/internal/misc"); }
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@Test public void testJavaLangInvoke() throws Throwable { test("java/lang/invoke"); }
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@Test public void testProhibitedJavaPkg() throws Throwable {
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try {
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test("java/prohibited");
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} catch (IllegalArgumentException e) {
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return;
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}
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throw new RuntimeException("Expected SecurityException");
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}
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private static void test(String pkg) throws Throwable {
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byte[] bytes = dumpClass(pkg);
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Lookup lookup;
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if (pkg.equals("java/prohibited")) {
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StaticInvocableTest sampleclass = new StaticInvocableTest();
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lookup = LookupHelper.newLookup(sampleclass.getClass());
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} else if (pkg.equals("java/lang")) {
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lookup = LookupHelper.newLookup(Object.class);
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} else if (pkg.equals("java/util")) {
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lookup = LookupHelper.newLookup(java.util.ArrayList.class);
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} else if (pkg.equals("jdk/internal/misc")) {
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lookup = LookupHelper.newLookup(jdk.internal.misc.Signal.class);
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} else if (pkg.equals("java/lang/invoke")) {
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lookup = LookupHelper.newLookup(java.lang.invoke.CallSite.class);
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} else {
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throw new RuntimeException("Unexpected pkg: " + pkg);
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}
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// Define hidden class
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Lookup l = lookup.defineHiddenClass(bytes, true);
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MethodType t = MethodType.methodType(Object.class, int.class);
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MethodHandle target = l.findStatic(l.lookupClass(), "get", t);
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// Wrap target into LF (convert) to get "target" referenced from LF
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MethodHandle wrappedMH = target.asType(MethodType.methodType(Object.class, Integer.class));
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// Invoke enough times to provoke LF compilation to bytecode.
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for (int i = 0; i<100; i++) {
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Object r = wrappedMH.invokeExact((Integer)1);
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}
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}
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/*
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* Constructs bytecode for the following class:
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* public class pkg.MyClass {
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* MyClass() {}
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* public Object get(int i) { return null; }
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* }
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*/
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public static byte[] dumpClass(String pkg) {
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return ClassFile.of().build(ClassDesc.of(pkg.replace('/', '.'), "MyClass"), clb -> {
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clb.withSuperclass(CD_Object);
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clb.withFlags(AccessFlag.PUBLIC, AccessFlag.SUPER);
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clb.withMethodBody(INIT_NAME, MTD_void, 0, cob -> {
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cob.aload(0);
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cob.invokespecial(CD_Object, INIT_NAME, MTD_void);
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cob.return_();
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});
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clb.withMethodBody("get", MethodTypeDesc.of(CD_Object, CD_int),
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ACC_PUBLIC | ACC_STATIC, cob -> {
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cob.aconst_null();
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cob.areturn();
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});
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});
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}
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}
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