| /* |
| * 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()); |
| } |
| |
| } |