| /* |
| * Copyright (c) 2015, 2016, 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.core.common.type.ObjectStamp; |
| import org.graalvm.compiler.core.common.type.Stamp; |
| import org.graalvm.compiler.graph.Graph; |
| import org.graalvm.compiler.graph.Node; |
| import org.graalvm.compiler.graph.NodeInputList; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.java.MethodCallTargetNode; |
| import org.graalvm.compiler.nodes.spi.Virtualizable; |
| import org.graalvm.compiler.phases.VerifyPhase; |
| import org.graalvm.compiler.phases.tiers.PhaseContext; |
| |
| import jdk.vm.ci.meta.ResolvedJavaMethod; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * |
| * Verifies that node types implementing the {@link Virtualizable} interface use it correctly. |
| * Implementors of {@link Virtualizable#virtualize(org.graalvm.compiler.nodes.spi.VirtualizerTool)} |
| * must not apply effects on their {@link Graph graph} that cannot be easily undone. |
| */ |
| public class VerifyVirtualizableUsage extends VerifyPhase<PhaseContext> { |
| @Override |
| public boolean checkContract() { |
| return false; |
| } |
| |
| @Override |
| protected boolean verify(StructuredGraph graph, PhaseContext context) { |
| final ResolvedJavaType graphType = context.getMetaAccess().lookupJavaType(Graph.class); |
| final ResolvedJavaType virtualizableType = context.getMetaAccess().lookupJavaType(Virtualizable.class); |
| final ResolvedJavaType constantNodeType = context.getMetaAccess().lookupJavaType(ConstantNode.class); |
| if (virtualizableType.isAssignableFrom(graph.method().getDeclaringClass()) && graph.method().getName().equals("virtualize")) { |
| for (MethodCallTargetNode t : graph.getNodes(MethodCallTargetNode.TYPE)) { |
| int bci = t.invoke().bci(); |
| ResolvedJavaMethod callee = t.targetMethod(); |
| String calleeName = callee.getName(); |
| if (callee.getDeclaringClass().equals(graphType)) { |
| if (calleeName.equals("add") || calleeName.equals("addWithoutUnique") || calleeName.equals("addOrUnique") || calleeName.equals("addWithoutUniqueWithInputs") || |
| calleeName.equals("addOrUniqueWithInputs")) { |
| verifyVirtualizableEffectArguments(constantNodeType, graph.method(), callee, bci, t.arguments(), 1); |
| } |
| } |
| } |
| } |
| return true; |
| } |
| |
| private static void verifyVirtualizableEffectArguments(ResolvedJavaType constantNodeType, ResolvedJavaMethod caller, ResolvedJavaMethod callee, int bciCaller, |
| NodeInputList<? extends Node> arguments, int startIdx) { |
| /* |
| * Virtualizable.virtualize should never apply effects on the graph during the execution of |
| * the call as the handling of loops during pea might be speculative and does not hold. We |
| * should only allow nodes changing the graph that do no harm like constants. |
| */ |
| int i = 0; |
| for (Node arg : arguments) { |
| if (i >= startIdx) { |
| Stamp argStamp = ((ValueNode) arg).stamp(); |
| if (argStamp instanceof ObjectStamp) { |
| ObjectStamp objectStamp = (ObjectStamp) argStamp; |
| ResolvedJavaType argStampType = objectStamp.type(); |
| if (!(argStampType.equals(constantNodeType))) { |
| StackTraceElement e = caller.asStackTraceElement(bciCaller); |
| throw new VerificationError("%s:Parameter %d in call to %s (which has effects on the graph) is not a " + |
| "constant and thus not safe to apply during speculative virtualization.", e, i, callee.format("%H.%n(%p)")); |
| } |
| } |
| } |
| i++; |
| } |
| } |
| |
| } |