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/*
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* Copyright (c) 2013, 2018, 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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package org.graalvm.compiler.hotspot.phases;
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import static org.graalvm.compiler.nodes.ConstantNode.getConstantNodes;
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import org.graalvm.compiler.nodes.ConstantNode;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.nodes.spi.CoreProviders;
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import org.graalvm.compiler.nodes.type.StampTool;
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import org.graalvm.compiler.phases.VerifyPhase;
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import jdk.vm.ci.hotspot.HotSpotObjectConstant;
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import jdk.vm.ci.meta.JavaKind;
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/**
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* Checks for {@link #isIllegalObjectConstant(ConstantNode) illegal} object constants in a graph
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* processed for AOT compilation.
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*
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* @see LoadJavaMirrorWithKlassPhase
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*/
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public class AheadOfTimeVerificationPhase extends VerifyPhase<CoreProviders> {
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@Override
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protected void verify(StructuredGraph graph, CoreProviders context) {
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for (ConstantNode node : getConstantNodes(graph)) {
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if (isIllegalObjectConstant(node)) {
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throw new VerificationError("illegal object constant: " + node);
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}
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}
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}
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public static boolean isIllegalObjectConstant(ConstantNode node) {
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return isObject(node) &&
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!isNullReference(node) &&
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!isInternedString(node) &&
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!isDirectMethodHandle(node) &&
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!isBoundMethodHandle(node) &&
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!isVarHandle(node);
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}
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private static boolean isObject(ConstantNode node) {
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return node.getStackKind() == JavaKind.Object;
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}
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private static boolean isNullReference(ConstantNode node) {
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return isObject(node) && node.isNullConstant();
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}
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private static boolean isDirectMethodHandle(ConstantNode node) {
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if (!isObject(node)) {
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return false;
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}
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return "Ljava/lang/invoke/DirectMethodHandle;".equals(StampTool.typeOrNull(node).getName());
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}
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private static boolean isBoundMethodHandle(ConstantNode node) {
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if (!isObject(node)) {
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return false;
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}
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return StampTool.typeOrNull(node).getName().startsWith("Ljava/lang/invoke/BoundMethodHandle");
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}
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private static boolean isVarHandle(ConstantNode node) {
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if (!isObject(node)) {
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return false;
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}
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String name = StampTool.typeOrNull(node).getName();
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return name.equals("Ljava/lang/invoke/VarHandle$AccessDescriptor;");
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}
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private static boolean isInternedString(ConstantNode node) {
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if (!isObject(node)) {
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return false;
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}
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HotSpotObjectConstant c = (HotSpotObjectConstant) node.asConstant();
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return c.isInternedString();
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}
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}
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