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/*
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* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package org.graalvm.compiler.printer;
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import static org.graalvm.compiler.debug.DebugConfig.asJavaMethod;
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import java.io.IOException;
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import java.lang.management.ManagementFactory;
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import java.nio.channels.ClosedByInterruptException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.WeakHashMap;
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import org.graalvm.compiler.debug.DebugContext;
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import org.graalvm.compiler.debug.DebugDumpHandler;
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import org.graalvm.compiler.debug.DebugDumpScope;
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import org.graalvm.compiler.debug.DebugOptions;
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import org.graalvm.compiler.debug.GraalError;
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import org.graalvm.compiler.debug.TTY;
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import org.graalvm.compiler.graph.Graph;
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import org.graalvm.compiler.nodes.StructuredGraph;
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import org.graalvm.compiler.options.OptionValues;
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import org.graalvm.compiler.phases.contract.NodeCostUtil;
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import jdk.vm.ci.meta.JavaMethod;
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import jdk.vm.ci.meta.ResolvedJavaMethod;
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//JaCoCo Exclude
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/**
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* Observes compilation events and uses {@link IdealGraphPrinter} to generate a graph representation
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* that can be inspected with the Graph Visualizer.
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*/
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public class GraphPrinterDumpHandler implements DebugDumpHandler {
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private static final int FAILURE_LIMIT = 8;
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private final GraphPrinterSupplier printerSupplier;
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protected GraphPrinter printer;
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private List<String> previousInlineContext;
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private int[] dumpIds = {};
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private int failuresCount;
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private Map<Graph, List<String>> inlineContextMap;
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private final String jvmArguments;
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private final String sunJavaCommand;
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@FunctionalInterface
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public interface GraphPrinterSupplier {
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GraphPrinter get(Graph graph) throws IOException;
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}
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/**
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* Creates a new {@link GraphPrinterDumpHandler}.
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*
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* @param printerSupplier Supplier used to create the GraphPrinter. Should supply an optional or
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* null in case of failure.
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*/
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public GraphPrinterDumpHandler(GraphPrinterSupplier printerSupplier) {
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this.printerSupplier = printerSupplier;
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/* Add the JVM and Java arguments to the graph properties to help identify it. */
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this.jvmArguments = String.join(" ", ManagementFactory.getRuntimeMXBean().getInputArguments());
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this.sunJavaCommand = System.getProperty("sun.java.command");
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}
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private void ensureInitialized(Graph graph) {
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if (printer == null) {
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if (failuresCount >= FAILURE_LIMIT) {
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return;
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}
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previousInlineContext = new ArrayList<>();
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inlineContextMap = new WeakHashMap<>();
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DebugContext debug = graph.getDebug();
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try {
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printer = printerSupplier.get(graph);
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} catch (IOException e) {
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handleException(debug, e);
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}
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}
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}
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private int nextDumpId() {
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int depth = previousInlineContext.size();
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if (dumpIds.length < depth) {
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dumpIds = Arrays.copyOf(dumpIds, depth);
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}
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return dumpIds[depth - 1]++;
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}
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@Override
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@SuppressWarnings("try")
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public void dump(DebugContext debug, Object object, final String format, Object... arguments) {
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OptionValues options = debug.getOptions();
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if (object instanceof Graph && DebugOptions.PrintGraph.getValue(options)) {
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final Graph graph = (Graph) object;
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ensureInitialized(graph);
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if (printer == null) {
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return;
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}
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// Get all current JavaMethod instances in the context.
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List<String> inlineContext = getInlineContext(graph);
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if (inlineContext != previousInlineContext) {
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Map<Object, Object> properties = new HashMap<>();
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properties.put("graph", graph.toString());
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addCompilationId(properties, graph);
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if (inlineContext.equals(previousInlineContext)) {
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/*
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* two different graphs have the same inline context, so make sure they appear
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* in different folders by closing and reopening the top scope.
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*/
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int inlineDepth = previousInlineContext.size() - 1;
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closeScope(debug, inlineDepth);
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openScope(debug, inlineContext.get(inlineDepth), inlineDepth, properties);
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} else {
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// Check for method scopes that must be closed since the previous dump.
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for (int i = 0; i < previousInlineContext.size(); ++i) {
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if (i >= inlineContext.size() || !inlineContext.get(i).equals(previousInlineContext.get(i))) {
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for (int inlineDepth = previousInlineContext.size() - 1; inlineDepth >= i; --inlineDepth) {
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closeScope(debug, inlineDepth);
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}
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break;
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}
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}
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// Check for method scopes that must be opened since the previous dump.
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for (int i = 0; i < inlineContext.size(); ++i) {
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if (i >= previousInlineContext.size() || !inlineContext.get(i).equals(previousInlineContext.get(i))) {
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for (int inlineDepth = i; inlineDepth < inlineContext.size(); ++inlineDepth) {
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openScope(debug, inlineContext.get(inlineDepth), inlineDepth, inlineDepth == inlineContext.size() - 1 ? properties : null);
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}
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break;
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}
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}
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}
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}
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// Save inline context for next dump.
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previousInlineContext = inlineContext;
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try (DebugContext.Scope s = debug.sandbox("PrintingGraph", null)) {
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// Finally, output the graph.
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Map<Object, Object> properties = new HashMap<>();
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properties.put("graph", graph.toString());
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properties.put("scope", debug.getCurrentScopeName());
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if (graph instanceof StructuredGraph) {
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properties.put("compilationIdentifier", ((StructuredGraph) graph).compilationId());
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try {
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int size = NodeCostUtil.computeGraphSize((StructuredGraph) graph);
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properties.put("node-cost graph size", size);
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} catch (Throwable t) {
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properties.put("node-cost-exception", t.getMessage());
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}
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}
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printer.print(debug, graph, properties, nextDumpId(), format, arguments);
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} catch (IOException e) {
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handleException(debug, e);
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} catch (Throwable e) {
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throw debug.handle(e);
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}
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}
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}
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void handleException(DebugContext debug, IOException e) {
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if (debug != null && DebugOptions.DumpingErrorsAreFatal.getValue(debug.getOptions())) {
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throw new GraalError(e);
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}
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if (e instanceof ClosedByInterruptException) {
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/*
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* The current dumping was aborted by an interrupt so treat this as a transient failure.
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*/
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failuresCount = 0;
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} else {
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failuresCount++;
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}
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printer = null;
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e.printStackTrace(TTY.out);
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if (failuresCount > FAILURE_LIMIT) {
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TTY.println("Too many failures with dumping. Disabling dump in thread " + Thread.currentThread());
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}
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}
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private static void addCompilationId(Map<Object, Object> properties, final Graph graph) {
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if (graph instanceof StructuredGraph) {
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properties.put("compilationId", ((StructuredGraph) graph).compilationId());
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}
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}
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private List<String> getInlineContext(Graph graph) {
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List<String> result = inlineContextMap.get(graph);
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if (result == null) {
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result = new ArrayList<>();
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Object lastMethodOrGraph = null;
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boolean graphSeen = false;
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DebugContext debug = graph.getDebug();
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for (Object o : debug.context()) {
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if (o == graph) {
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graphSeen = true;
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}
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if (o instanceof DebugDumpScope) {
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DebugDumpScope debugDumpScope = (DebugDumpScope) o;
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if (debugDumpScope.decorator && !result.isEmpty()) {
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result.set(result.size() - 1, debugDumpScope.name + ":" + result.get(result.size() - 1));
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} else {
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result.add(debugDumpScope.name);
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}
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} else {
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addMethodContext(result, o, lastMethodOrGraph);
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}
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if (o instanceof JavaMethod || o instanceof Graph) {
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lastMethodOrGraph = o;
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}
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}
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if (result.isEmpty()) {
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result.add(graph.toString());
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graphSeen = true;
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}
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// Reverse list such that inner method comes after outer method.
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Collections.reverse(result);
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if (!graphSeen) {
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/*
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* The graph isn't in any context but is being processed within another graph so add
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* it to the end of the scopes.
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*/
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if (asJavaMethod(graph) != null) {
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addMethodContext(result, graph, lastMethodOrGraph);
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} else {
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result.add(graph.toString());
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}
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}
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inlineContextMap.put(graph, result);
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}
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return result;
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}
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private static void addMethodContext(List<String> result, Object o, Object lastMethodOrGraph) {
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JavaMethod method = asJavaMethod(o);
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if (method != null) {
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/*
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* Include the current method in the context if there was no previous JavaMethod or
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* JavaMethodContext or if the method is different or if the method is the same but it
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* comes from two different graphs. This ensures that recursive call patterns are
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* handled properly.
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*/
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if (lastMethodOrGraph == null || asJavaMethod(lastMethodOrGraph) == null || !asJavaMethod(lastMethodOrGraph).equals(method) ||
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(lastMethodOrGraph != o && lastMethodOrGraph instanceof Graph && o instanceof Graph)) {
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result.add(method.format("%H.%n(%p)"));
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} else {
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/*
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* This prevents multiple adjacent method context objects for the same method from
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* resulting in multiple IGV tree levels. This works on the assumption that real
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* inlining debug scopes will have a graph context object between the inliner and
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* inlinee context objects.
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*/
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}
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}
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}
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private void openScope(DebugContext debug, String name, int inlineDepth, Map<Object, Object> properties) {
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try {
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Map<Object, Object> props = properties;
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if (inlineDepth == 0) {
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/* Include some VM specific properties at the root. */
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if (props == null) {
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props = new HashMap<>();
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}
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props.put("jvmArguments", jvmArguments);
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if (sunJavaCommand != null) {
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props.put("sun.java.command", sunJavaCommand);
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}
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props.put("date", new Date().toString());
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}
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printer.beginGroup(debug, name, name, debug.contextLookup(ResolvedJavaMethod.class), -1, props);
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} catch (IOException e) {
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handleException(debug, e);
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}
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}
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private void closeScope(DebugContext debug, int inlineDepth) {
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dumpIds[inlineDepth] = 0;
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try {
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if (printer != null) {
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printer.endGroup();
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}
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} catch (IOException e) {
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handleException(debug, e);
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}
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}
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@Override
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public void close() {
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if (previousInlineContext != null) {
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for (int inlineDepth = 0; inlineDepth < previousInlineContext.size(); inlineDepth++) {
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closeScope(null, inlineDepth);
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}
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}
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if (printer != null) {
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printer.close();
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printer = null;
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}
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}
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}
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