--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/stubs/SnippetStub.java Thu Feb 16 15:46:09 2017 -0800
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2012, 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.hotspot.stubs;
+
+import static org.graalvm.compiler.nodes.StructuredGraph.NO_PROFILING_INFO;
+import static org.graalvm.compiler.nodes.graphbuilderconf.IntrinsicContext.CompilationContext.INLINE_AFTER_PARSING;
+
+import java.lang.reflect.Method;
+
+import org.graalvm.compiler.api.replacements.Snippet;
+import org.graalvm.compiler.api.replacements.Snippet.ConstantParameter;
+import org.graalvm.compiler.core.common.CompilationIdentifier;
+import org.graalvm.compiler.api.replacements.SnippetReflectionProvider;
+import org.graalvm.compiler.debug.Debug;
+import org.graalvm.compiler.debug.Debug.Scope;
+import org.graalvm.compiler.debug.GraalError;
+import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage;
+import org.graalvm.compiler.hotspot.meta.HotSpotProviders;
+import org.graalvm.compiler.java.GraphBuilderPhase;
+import org.graalvm.compiler.nodes.StructuredGraph;
+import org.graalvm.compiler.nodes.StructuredGraph.AllowAssumptions;
+import org.graalvm.compiler.nodes.StructuredGraph.GuardsStage;
+import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration;
+import org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderConfiguration.Plugins;
+import org.graalvm.compiler.nodes.graphbuilderconf.IntrinsicContext;
+import org.graalvm.compiler.nodes.spi.LoweringTool;
+import org.graalvm.compiler.phases.OptimisticOptimizations;
+import org.graalvm.compiler.phases.common.CanonicalizerPhase;
+import org.graalvm.compiler.phases.common.LoweringPhase;
+import org.graalvm.compiler.phases.tiers.PhaseContext;
+import org.graalvm.compiler.replacements.ConstantBindingParameterPlugin;
+import org.graalvm.compiler.replacements.SnippetTemplate;
+import org.graalvm.compiler.replacements.Snippets;
+
+import jdk.vm.ci.meta.Local;
+import jdk.vm.ci.meta.LocalVariableTable;
+import jdk.vm.ci.meta.MetaAccessProvider;
+import jdk.vm.ci.meta.ResolvedJavaMethod;
+
+/**
+ * Base class for a stub defined by a snippet.
+ */
+public abstract class SnippetStub extends Stub implements Snippets {
+
+ protected final ResolvedJavaMethod method;
+
+ /**
+ * Creates a new snippet stub.
+ *
+ * @param snippetMethodName name of the single {@link Snippet} annotated method in the class of
+ * this object
+ * @param linkage linkage details for a call to the stub
+ */
+ public SnippetStub(String snippetMethodName, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) {
+ this(null, snippetMethodName, providers, linkage);
+ }
+
+ /**
+ * Creates a new snippet stub.
+ *
+ * @param snippetDeclaringClass this class in which the {@link Snippet} annotated method is
+ * declared. If {@code null}, this the class of this object is used.
+ * @param snippetMethodName name of the single {@link Snippet} annotated method in
+ * {@code snippetDeclaringClass}
+ * @param linkage linkage details for a call to the stub
+ */
+ public SnippetStub(Class<? extends Snippets> snippetDeclaringClass, String snippetMethodName, HotSpotProviders providers, HotSpotForeignCallLinkage linkage) {
+ super(providers, linkage);
+ Method javaMethod = SnippetTemplate.AbstractTemplates.findMethod(snippetDeclaringClass == null ? getClass() : snippetDeclaringClass, snippetMethodName, null);
+ this.method = providers.getMetaAccess().lookupJavaMethod(javaMethod);
+ }
+
+ @SuppressWarnings("all")
+ private static boolean assertionsEnabled() {
+ boolean enabled = false;
+ assert enabled = true;
+ return enabled;
+ }
+
+ public static final ThreadLocal<StructuredGraph> SnippetGraphUnderConstruction = assertionsEnabled() ? new ThreadLocal<>() : null;
+
+ @Override
+ @SuppressWarnings("try")
+ protected StructuredGraph getGraph(CompilationIdentifier compilationId) {
+ Plugins defaultPlugins = providers.getGraphBuilderPlugins();
+ MetaAccessProvider metaAccess = providers.getMetaAccess();
+ SnippetReflectionProvider snippetReflection = providers.getSnippetReflection();
+
+ Plugins plugins = new Plugins(defaultPlugins);
+ plugins.prependParameterPlugin(new ConstantBindingParameterPlugin(makeConstArgs(), metaAccess, snippetReflection));
+ GraphBuilderConfiguration config = GraphBuilderConfiguration.getSnippetDefault(plugins);
+
+ // Stubs cannot have optimistic assumptions since they have
+ // to be valid for the entire run of the VM.
+ final StructuredGraph graph = new StructuredGraph(method, AllowAssumptions.NO, NO_PROFILING_INFO, compilationId);
+ try (Scope outer = Debug.scope("SnippetStub", graph)) {
+ graph.disableUnsafeAccessTracking();
+
+ if (SnippetGraphUnderConstruction != null) {
+ assert SnippetGraphUnderConstruction.get() == null : SnippetGraphUnderConstruction.get().toString() + " " + graph;
+ SnippetGraphUnderConstruction.set(graph);
+ }
+
+ try {
+ IntrinsicContext initialIntrinsicContext = new IntrinsicContext(method, method, providers.getReplacements().getReplacementBytecodeProvider(), INLINE_AFTER_PARSING);
+ GraphBuilderPhase.Instance instance = new GraphBuilderPhase.Instance(metaAccess, providers.getStampProvider(),
+ providers.getConstantReflection(), providers.getConstantFieldProvider(),
+ config, OptimisticOptimizations.NONE,
+ initialIntrinsicContext);
+ instance.apply(graph);
+
+ } finally {
+ if (SnippetGraphUnderConstruction != null) {
+ SnippetGraphUnderConstruction.set(null);
+ }
+ }
+
+ graph.setGuardsStage(GuardsStage.FLOATING_GUARDS);
+ CanonicalizerPhase canonicalizer = new CanonicalizerPhase();
+ PhaseContext context = new PhaseContext(providers);
+ canonicalizer.apply(graph, context);
+ new LoweringPhase(canonicalizer, LoweringTool.StandardLoweringStage.HIGH_TIER).apply(graph, context);
+ } catch (Throwable e) {
+ throw Debug.handle(e);
+ }
+
+ return graph;
+ }
+
+ protected boolean checkConstArg(int index, String expectedName) {
+ assert method.getParameterAnnotation(ConstantParameter.class, index) != null : String.format("parameter %d of %s is expected to be constant", index, method.format("%H.%n(%p)"));
+ LocalVariableTable lvt = method.getLocalVariableTable();
+ if (lvt != null) {
+ Local local = lvt.getLocal(index, 0);
+ assert local != null;
+ String actualName = local.getName();
+ assert actualName.equals(expectedName) : String.format("parameter %d of %s is expected to be named %s, not %s", index, method.format("%H.%n(%p)"), expectedName, actualName);
+ }
+ return true;
+ }
+
+ protected Object[] makeConstArgs() {
+ int count = method.getSignature().getParameterCount(false);
+ Object[] args = new Object[count];
+ for (int i = 0; i < args.length; i++) {
+ if (method.getParameterAnnotation(ConstantParameter.class, i) != null) {
+ args[i] = getConstantParameterValue(i, null);
+ }
+ }
+ return args;
+ }
+
+ protected Object getConstantParameterValue(int index, String name) {
+ throw new GraalError("%s must override getConstantParameterValue() to provide a value for parameter %d%s", getClass().getName(), index, name == null ? "" : " (" + name + ")");
+ }
+
+ @Override
+ protected Object debugScopeContext() {
+ return getInstalledCodeOwner();
+ }
+
+ @Override
+ public ResolvedJavaMethod getInstalledCodeOwner() {
+ return method;
+ }
+
+ @Override
+ public String toString() {
+ return "Stub<" + getInstalledCodeOwner().format("%h.%n") + ">";
+ }
+}