Mercurial > hg > graal-jvmci-8
view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/impl/DefaultTruffleRuntime.java @ 16529:f6ac86d3334e
Change API for stack walking to a visitor: TruffleRuntime#iterateFrames replaces TruffleRuntime#getStackTrace
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Tue, 15 Jul 2014 16:34:53 -0700 |
parents | a3b0ecef8a15 |
children | ada0a7729b6f |
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/* * Copyright (c) 2012, 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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.truffle.api.impl; import java.util.*; import com.oracle.truffle.api.*; import com.oracle.truffle.api.frame.*; import com.oracle.truffle.api.nodes.*; /** * Default implementation of the Truffle runtime if the virtual machine does not provide a better * performing alternative. * <p> * This is an implementation-specific class. Do not use or instantiate it. Instead, use * {@link Truffle#getRuntime()} to retrieve the current {@link TruffleRuntime}. */ public final class DefaultTruffleRuntime implements TruffleRuntime { private ThreadLocal<LinkedList<FrameInstance>> stackTraces = new ThreadLocal<>(); private ThreadLocal<FrameInstance> currentFrames = new ThreadLocal<>(); public DefaultTruffleRuntime() { if (Truffle.getRuntime() != null) { throw new IllegalArgumentException("Cannot instantiate DefaultTruffleRuntime. Use Truffle.getRuntime() instead."); } } @Override public String getName() { return "Default Truffle Runtime"; } @Override public RootCallTarget createCallTarget(RootNode rootNode) { return new DefaultCallTarget(rootNode, this); } public DirectCallNode createDirectCallNode(CallTarget target) { return new DefaultDirectCallNode(target, this); } public IndirectCallNode createIndirectCallNode() { return new DefaultIndirectCallNode(); } @Override public VirtualFrame createVirtualFrame(Object[] arguments, FrameDescriptor frameDescriptor) { return new DefaultVirtualFrame(frameDescriptor, arguments); } @Override public MaterializedFrame createMaterializedFrame(Object[] arguments) { return createMaterializedFrame(arguments, new FrameDescriptor()); } @Override public MaterializedFrame createMaterializedFrame(Object[] arguments, FrameDescriptor frameDescriptor) { return new DefaultMaterializedFrame(new DefaultVirtualFrame(frameDescriptor, arguments)); } @Override public Assumption createAssumption() { return createAssumption(null); } @Override public Assumption createAssumption(String name) { return new DefaultAssumption(name); } private LinkedList<FrameInstance> getThreadLocalStackTrace() { LinkedList<FrameInstance> result = stackTraces.get(); if (result == null) { result = new LinkedList<>(); stackTraces.set(result); } return result; } public FrameInstance setCurrentFrame(FrameInstance newValue) { FrameInstance oldValue = currentFrames.get(); currentFrames.set(newValue); return oldValue; } public void pushFrame(FrameInstance frame) { getThreadLocalStackTrace().addFirst(frame); } public void popFrame() { getThreadLocalStackTrace().removeFirst(); } @Override public <T> T iterateFrames(FrameInstanceVisitor<T> visitor) { T result = null; for (FrameInstance frameInstance : getThreadLocalStackTrace()) { result = visitor.visitFrame(frameInstance); if (result != null) { return result; } } return result; } @Override public FrameInstance getCallerFrame() { return getThreadLocalStackTrace().peekFirst(); } @Override public FrameInstance getCurrentFrame() { return currentFrames.get(); } }