--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.core.test/src/org/graalvm/compiler/core/test/MethodHandleEagerResolution.java 2016-12-07 13:48:28.377759955 -0800 @@ -0,0 +1,68 @@ +/* + * Copyright (c) 2011, 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. + */ +package org.graalvm.compiler.core.test; + +import java.lang.invoke.MethodHandle; +import java.lang.invoke.MethodHandles; +import java.lang.reflect.Field; + +import org.junit.Test; + +import org.graalvm.compiler.nodes.DeoptimizeNode; +import org.graalvm.compiler.nodes.StructuredGraph; +import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions; + +public final class MethodHandleEagerResolution extends GraalCompilerTest { + private static final MethodHandle FIELD_HANDLE; + + static { + Field field; + try { + field = String.class.getDeclaredField("value"); + } catch (NoSuchFieldException ex) { + throw new RuntimeException(ex.getMessage(), ex); + } + field.setAccessible(true); + + try { + FIELD_HANDLE = MethodHandles.lookup().unreflectGetter(field); + } catch (IllegalAccessException e) { + throw new RuntimeException("unable to initialize field handle", e); + } + } + + public static char[] getBackingCharArray(String str) { + try { + return (char[]) FIELD_HANDLE.invokeExact(str); + } catch (Throwable e) { + throw new IllegalStateException(); + } + } + + @Test + public void testFieldInvokeExact() { + StructuredGraph graph = parseEager("getBackingCharArray", AllowAssumptions.NO); + assertTrue(graph.getNodes().filter(DeoptimizeNode.class).isEmpty()); + } + +}