| /* |
| * Copyright (c) 2017, 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.phases.verify; |
| |
| import org.graalvm.compiler.lir.StandardOp.LoadConstantOp; |
| import org.graalvm.compiler.lir.StandardOp.MoveOp; |
| import org.graalvm.compiler.lir.StandardOp.ValueMoveOp; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.java.InstanceOfNode; |
| import org.graalvm.compiler.phases.VerifyPhase; |
| import org.graalvm.compiler.phases.tiers.PhaseContext; |
| |
| import jdk.vm.ci.meta.MetaAccessProvider; |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * Checks that we do not use {@code instanceof} for types where faster alternatives are available. |
| */ |
| public class VerifyInstanceOfUsage extends VerifyPhase<PhaseContext> { |
| |
| private static final Class<?>[] FORBIDDEN_INSTANCE_OF_CHECKS = { |
| MoveOp.class, |
| ValueMoveOp.class, |
| LoadConstantOp.class |
| }; |
| |
| @Override |
| public boolean checkContract() { |
| return false; |
| } |
| |
| @Override |
| protected boolean verify(StructuredGraph graph, PhaseContext context) { |
| final ResolvedJavaType[] bailoutType = new ResolvedJavaType[FORBIDDEN_INSTANCE_OF_CHECKS.length]; |
| for (int i = 0; i < FORBIDDEN_INSTANCE_OF_CHECKS.length; i++) { |
| bailoutType[i] = context.getMetaAccess().lookupJavaType(FORBIDDEN_INSTANCE_OF_CHECKS[i]); |
| } |
| ResolvedJavaMethod method = graph.method(); |
| ResolvedJavaType declaringClass = method.getDeclaringClass(); |
| if (!isTrustedInterface(declaringClass, context.getMetaAccess())) { |
| |
| for (InstanceOfNode io : graph.getNodes().filter(InstanceOfNode.class)) { |
| ResolvedJavaType type = io.type().getType(); |
| for (ResolvedJavaType forbiddenType : bailoutType) { |
| if (forbiddenType.equals(type)) { |
| String name = forbiddenType.getUnqualifiedName(); |
| // strip outer class |
| ResolvedJavaType enclosingType = forbiddenType.getEnclosingType(); |
| if (enclosingType != null) { |
| name = name.substring(enclosingType.getUnqualifiedName().length() + "$".length()); |
| } |
| throw new VerificationError("Using `op instanceof %s` is not allowed. Use `%s.is%s(op)` instead. (in %s)", name, name, name, method.format("%H.%n(%p)")); |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| private static boolean isTrustedInterface(ResolvedJavaType declaringClass, MetaAccessProvider metaAccess) { |
| for (Class<?> trustedCls : FORBIDDEN_INSTANCE_OF_CHECKS) { |
| ResolvedJavaType trusted = metaAccess.lookupJavaType(trustedCls); |
| if (trusted.equals(declaringClass)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |