Mercurial > hg > graal-compiler
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/replacements/ReflectionGetCallerClassNode.java @ 23351:3bc2598ce1e0
Update JVMCI import: Move lookup of Java class and hub from ResolvedJavaType to ConstantReflectionProvider
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Mon, 25 Jan 2016 15:03:43 -0800 |
parents | 615f3bbbb174 |
children |
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/* * Copyright (c) 2013, 2015, 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 com.oracle.graal.hotspot.replacements; import jdk.vm.ci.common.JVMCIError; import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod; import jdk.vm.ci.hotspot.HotSpotResolvedObjectType; import jdk.vm.ci.meta.ConstantReflectionProvider; import jdk.vm.ci.meta.JavaType; import jdk.vm.ci.meta.MetaAccessProvider; import jdk.vm.ci.meta.ResolvedJavaMethod; import com.oracle.graal.graph.Node; import com.oracle.graal.graph.NodeClass; import com.oracle.graal.graph.spi.Canonicalizable; import com.oracle.graal.graph.spi.CanonicalizerTool; import com.oracle.graal.nodeinfo.NodeInfo; import com.oracle.graal.nodes.CallTargetNode.InvokeKind; import com.oracle.graal.nodes.ConstantNode; import com.oracle.graal.nodes.FrameState; import com.oracle.graal.nodes.InvokeNode; import com.oracle.graal.nodes.ValueNode; import com.oracle.graal.nodes.spi.Lowerable; import com.oracle.graal.nodes.spi.LoweringTool; import com.oracle.graal.replacements.nodes.MacroStateSplitNode; @NodeInfo public final class ReflectionGetCallerClassNode extends MacroStateSplitNode implements Canonicalizable, Lowerable { public static final NodeClass<ReflectionGetCallerClassNode> TYPE = NodeClass.create(ReflectionGetCallerClassNode.class); public ReflectionGetCallerClassNode(InvokeKind invokeKind, ResolvedJavaMethod targetMethod, int bci, JavaType returnType, ValueNode... arguments) { super(TYPE, invokeKind, targetMethod, bci, returnType, arguments); } @Override public Node canonical(CanonicalizerTool tool) { ConstantNode callerClassNode = getCallerClassNode(tool.getMetaAccess(), tool.getConstantReflection()); if (callerClassNode != null) { return callerClassNode; } return this; } @Override public void lower(LoweringTool tool) { ConstantNode callerClassNode = getCallerClassNode(tool.getMetaAccess(), tool.getConstantReflection()); if (callerClassNode != null) { graph().replaceFixedWithFloating(this, graph().addOrUniqueWithInputs(callerClassNode)); } else { InvokeNode invoke = createInvoke(); graph().replaceFixedWithFixed(this, invoke); invoke.lower(tool); } } /** * If inlining is deep enough this method returns a {@link ConstantNode} of the caller class by * walking the the stack. * * @param metaAccess * @return ConstantNode of the caller class, or null */ private ConstantNode getCallerClassNode(MetaAccessProvider metaAccess, ConstantReflectionProvider constantReflection) { // Walk back up the frame states to find the caller at the required depth. FrameState state = stateAfter(); // Cf. JVM_GetCallerClass // NOTE: Start the loop at depth 1 because the current frame state does // not include the Reflection.getCallerClass() frame. for (int n = 1; state != null; state = state.outerFrameState(), n++) { HotSpotResolvedJavaMethod method = (HotSpotResolvedJavaMethod) state.method(); switch (n) { case 0: throw JVMCIError.shouldNotReachHere("current frame state does not include the Reflection.getCallerClass frame"); case 1: // Frame 0 and 1 must be caller sensitive (see JVM_GetCallerClass). if (!method.isCallerSensitive()) { return null; // bail-out; let JVM_GetCallerClass do the work } break; default: if (!method.ignoredBySecurityStackWalk()) { // We have reached the desired frame; return the holder class. HotSpotResolvedObjectType callerClass = method.getDeclaringClass(); return ConstantNode.forConstant(constantReflection.asJavaClass(callerClass), metaAccess); } break; } } return null; // bail-out; let JVM_GetCallerClass do the work } }