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view truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/ProbeNode.java @ 22548:6b76a24fffbd default tip
Use all variables: a, b, u,v and x, y
author | Jaroslav Tulach <jaroslav.tulach@oracle.com> |
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date | Thu, 14 Jan 2016 14:20:57 +0100 |
parents | 163fdf64587d |
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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. 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.instrument; import com.oracle.truffle.api.CompilerDirectives.CompilationFinal; import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary; import com.oracle.truffle.api.frame.VirtualFrame; import com.oracle.truffle.api.instrument.ProbeInstrument.AbstractInstrumentNode; import com.oracle.truffle.api.instrument.TagInstrument.AfterTagInstrument; import com.oracle.truffle.api.instrument.TagInstrument.BeforeTagInstrument; import com.oracle.truffle.api.nodes.Node; import com.oracle.truffle.api.nodes.NodeCost; import com.oracle.truffle.api.nodes.NodeInfo; /** * Implementation class & interface for enabling the attachment of {@linkplain Probe Probes} to * Truffle ASTs, part of the {@linkplain Instrumenter Instrumentation Framework}. * <p> * A {@link ProbeNode} is the head of a chain of nodes acting on behalf of * {@linkplain ProbeInstrument instruments}. It is attached to an AST as a child of a * guest-language-specific {@link WrapperNode} node. * <p> * When Truffle clones an AST, the chain, including all attached {@linkplain ProbeInstrument * instruments} will be cloned along with the {@link WrapperNode} to which it is attached. An * instance of {@link Probe} represents abstractly the instrumentation at a particular location in a * Guest Language AST, tracks the clones of the chain, and keeps the instrumentation attached to the * clones consistent. */ @NodeInfo(cost = NodeCost.NONE) final class ProbeNode extends EventHandlerNode { // Never changed once set. @CompilationFinal Probe probe = null; /** * First {@link AbstractInstrumentNode} node in chain; {@code null} of no instruments in chain. */ @Child protected AbstractInstrumentNode firstInstrumentNode; @Override public Node copy() { Node node = super.copy(); probe.registerProbeNodeClone((ProbeNode) node); return node; } /** * @return the {@link Probe} permanently associated with this {@link ProbeNode}. */ @Override public Probe getProbe() { return probe; } @Override public void enter(Node node, VirtualFrame vFrame) { this.probe.checkProbeUnchanged(); final BeforeTagInstrument beforeTagInstrument = probe.getBeforeTagInstrument(); if (beforeTagInstrument != null) { beforeTagInstrument.getListener().onEnter(probe, ((WrapperNode) this.getParent()).getChild(), vFrame); } if (firstInstrumentNode != null) { firstInstrumentNode.enter(node, vFrame); } } @Override public void returnVoid(Node node, VirtualFrame vFrame) { this.probe.checkProbeUnchanged(); if (firstInstrumentNode != null) { firstInstrumentNode.returnVoid(node, vFrame); } final AfterTagInstrument afterTagInstrument = probe.getAfterTagInstrument(); if (afterTagInstrument != null) { afterTagInstrument.getListener().onReturnVoid(probe, ((WrapperNode) this.getParent()).getChild(), vFrame); } } @Override public void returnValue(Node node, VirtualFrame vFrame, Object result) { this.probe.checkProbeUnchanged(); if (firstInstrumentNode != null) { firstInstrumentNode.returnValue(node, vFrame, result); } final AfterTagInstrument afterTagInstrument = probe.getAfterTagInstrument(); if (afterTagInstrument != null) { afterTagInstrument.getListener().onReturnValue(probe, ((WrapperNode) this.getParent()).getChild(), vFrame, result); } } @Override public void returnExceptional(Node node, VirtualFrame vFrame, Throwable exception) { if (exception instanceof KillException) { throw (KillException) exception; } if (exception instanceof QuitException) { throw (QuitException) exception; } this.probe.checkProbeUnchanged(); if (firstInstrumentNode != null) { firstInstrumentNode.returnExceptional(node, vFrame, exception); } final AfterTagInstrument afterTagInstrument = probe.getAfterTagInstrument(); if (afterTagInstrument != null) { afterTagInstrument.getListener().onReturnExceptional(probe, ((WrapperNode) this.getParent()).getChild(), vFrame, exception); } } @Override public String instrumentationInfo() { return "Standard probe"; } /** * Gets the guest-language AST node to which this Probe is attached. */ Node getProbedNode() { return ((WrapperNode) this.getParent()).getChild(); } /** * Adds an {@link AbstractInstrumentNode} to this chain. */ @TruffleBoundary void addInstrument(ProbeInstrument instrument) { assert instrument.getProbe() == probe; // The existing chain of nodes may be empty // Attach the modified chain. firstInstrumentNode = insert(instrument.addToChain(firstInstrumentNode)); } /** * Removes an instrument from this chain of instruments. * * @throws RuntimeException if no matching instrument is found, */ @TruffleBoundary void removeInstrument(ProbeInstrument instrument) { assert instrument.getProbe() == probe; final AbstractInstrumentNode modifiedChain = instrument.removeFromChain(firstInstrumentNode); if (modifiedChain == null) { firstInstrumentNode = null; } else { firstInstrumentNode = insert(modifiedChain); } } }