--- /dev/null 2014-06-16 20:54:49.000000000 +0400 +++ new/test/java/lang/invoke/VMAnonymousClass.java 2014-06-16 20:54:49.000000000 +0400 @@ -0,0 +1,118 @@ +/* + * Copyright (c) 2014, 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 8046903 + * @summary VM anonymous class members can't be statically invocable + * @run junit test.java.lang.invoke.VMAnonymousClass + */ +package test.java.lang.invoke; + +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.invoke.MethodType; +import java.lang.reflect.Field; +import org.junit.Test; +import sun.misc.Unsafe; +import jdk.internal.org.objectweb.asm.*; +import static jdk.internal.org.objectweb.asm.Opcodes.*; + +public class VMAnonymousClass { + public static void main(String[] args) throws Throwable { + VMAnonymousClass test = new VMAnonymousClass(); + test.testJavaLang(); + test.testJavaUtil(); + test.testSunMisc(); + test.testJavaLangInvoke(); + System.out.println("TEST PASSED"); + } + + // Test VM anonymous classes from different packages + // (see j.l.i.InvokerBytecodeGenerator::isStaticallyInvocable). + @Test public void testJavaLang() throws Throwable { test("java/lang"); } + @Test public void testJavaUtil() throws Throwable { test("java/util"); } + @Test public void testSunMisc() throws Throwable { test("sun/misc"); } + @Test public void testJavaLangInvoke() throws Throwable { test("java/lang/invoke"); } + + private static Unsafe unsafe = getUnsafe(); + + private static void test(String pkg) throws Throwable { + byte[] bytes = dumpClass(pkg); + // Define VM anonymous class in privileged context (on BCP). + Class anonClass = unsafe.defineAnonymousClass(Object.class, bytes, null); + + MethodType t = MethodType.methodType(Object.class, int.class); + MethodHandle target = MethodHandles.lookup().findStatic(anonClass, "get", t); + + // Wrap target into LF (convert) to get "target" referenced from LF + MethodHandle wrappedMH = target.asType(MethodType.methodType(Object.class, Integer.class)); + + // Invoke enough times to provoke LF compilation to bytecode. + for (int i = 0; i<100; i++) { + Object r = wrappedMH.invokeExact((Integer)1); + } + } + + /* + * Constructs bytecode for the following class: + * public class pkg.MyClass { + * MyClass() {} + * public Object get(int i) { return null; } + * } + */ + public static byte[] dumpClass(String pkg) { + ClassWriter cw = new ClassWriter(0); + MethodVisitor mv; + + cw.visit(52, ACC_SUPER | ACC_PUBLIC, pkg+"/MyClass", null, "java/lang/Object", null); + { + mv = cw.visitMethod(0, "", "()V", null, null); + mv.visitCode(); + mv.visitVarInsn(ALOAD, 0); + mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "", "()V", false); + mv.visitInsn(RETURN); + mv.visitMaxs(1, 1); + mv.visitEnd(); + } + { + mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "get", "(I)Ljava/lang/Object;", null, null); + mv.visitCode(); + mv.visitInsn(ACONST_NULL); + mv.visitInsn(ARETURN); + mv.visitMaxs(1, 1); + mv.visitEnd(); + } + cw.visitEnd(); + return cw.toByteArray(); + } + + private static synchronized Unsafe getUnsafe() { + try { + Field f = Unsafe.class.getDeclaredField("theUnsafe"); + f.setAccessible(true); + return (Unsafe) f.get(null); + } catch (NoSuchFieldException | IllegalAccessException e) { + throw new RuntimeException("Unable to get Unsafe instance.", e); + } + } +}