Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/ForeignCallStub.java @ 11700:528ab536b403
changed iteration over InvokeNodes in a graph to avoid Graph.getNodes() (GRAAL-471)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Wed, 18 Sep 2013 10:31:34 +0200 |
parents | 4eec2ac671c2 |
children | a80d09922fc1 |
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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. * * 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.stubs; import static com.oracle.graal.api.code.CallingConvention.Type.*; import static com.oracle.graal.api.meta.MetaUtil.*; import static com.oracle.graal.hotspot.HotSpotForeignCallLinkage.RegisterEffect.*; import static com.oracle.graal.hotspot.HotSpotForeignCallLinkage.Transition.*; import static com.oracle.graal.hotspot.HotSpotGraalRuntime.*; import java.lang.reflect.*; import java.util.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.debug.*; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.HotSpotForeignCallLinkage.Transition; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.hotspot.nodes.*; import com.oracle.graal.hotspot.replacements.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.calc.*; import com.oracle.graal.nodes.java.*; import com.oracle.graal.nodes.java.MethodCallTargetNode.InvokeKind; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.nodes.type.*; import com.oracle.graal.phases.common.*; import com.oracle.graal.replacements.*; import com.oracle.graal.replacements.nodes.*; import com.oracle.graal.word.*; import com.oracle.graal.word.phases.*; /** * A {@linkplain #getGraph() generated} stub for a {@link Transition non-leaf} foreign call from * compiled code. A stub is required for such calls as the caller may be scheduled for * deoptimization while the call is in progress. And since these are foreign/runtime calls on slow * paths, we don't want to force the register allocator to spill around the call. As such, this stub * saves and restores all allocatable registers. It also * {@linkplain StubUtil#handlePendingException(boolean) handles} any exceptions raised during the * foreign call. */ public class ForeignCallStub extends Stub { /** * The target of the call. */ private final HotSpotForeignCallLinkage target; /** * Specifies if the JavaThread value for the current thread is to be prepended to the arguments * for the call to {@link #target}. */ protected final boolean prependThread; /** * Creates a stub for a call to code at a given address. * * @param address the address of the code to call * @param descriptor the signature of the call to this stub * @param prependThread true if the JavaThread value for the current thread is to be prepended * to the arguments for the call to {@code address} * @param reexecutable specifies if the stub call can be re-executed without (meaningful) side * effects. Deoptimization will not return to a point before a stub call that cannot * be re-executed. * @param killedLocations the memory locations killed by the stub call */ public ForeignCallStub(HotSpotRuntime runtime, Replacements replacements, long address, ForeignCallDescriptor descriptor, boolean prependThread, Transition transition, boolean reexecutable, LocationIdentity... killedLocations) { super(runtime, replacements, HotSpotForeignCallLinkage.create(descriptor, 0L, PRESERVES_REGISTERS, JavaCall, JavaCallee, transition, reexecutable, killedLocations)); this.prependThread = prependThread; Class[] targetParameterTypes = createTargetParameters(descriptor); ForeignCallDescriptor targetSig = new ForeignCallDescriptor(descriptor.getName() + ":C", descriptor.getResultType(), targetParameterTypes); target = HotSpotForeignCallLinkage.create(targetSig, address, DESTROYS_REGISTERS, NativeCall, NativeCall, transition, reexecutable, killedLocations); } /** * Gets the linkage information for the call from this stub. */ public HotSpotForeignCallLinkage getTargetLinkage() { return target; } private Class[] createTargetParameters(ForeignCallDescriptor descriptor) { Class[] parameters = descriptor.getArgumentTypes(); if (prependThread) { Class[] newParameters = new Class[parameters.length + 1]; System.arraycopy(parameters, 0, newParameters, 1, parameters.length); newParameters[0] = Word.class; return newParameters; } return parameters; } @Override protected ResolvedJavaMethod getInstalledCodeOwner() { return null; } @Override protected Object debugScopeContext() { return new JavaMethod() { public Signature getSignature() { ForeignCallDescriptor d = linkage.getDescriptor(); Class<?>[] arguments = d.getArgumentTypes(); JavaType[] parameters = new JavaType[arguments.length]; for (int i = 0; i < arguments.length; i++) { parameters[i] = runtime.lookupJavaType(arguments[i]); } return new HotSpotSignature(runtime.lookupJavaType(d.getResultType()), parameters); } public String getName() { return linkage.getDescriptor().getName(); } public JavaType getDeclaringClass() { return runtime.lookupJavaType(ForeignCallStub.class); } @Override public String toString() { return format("ForeignCallStub<%n(%p)>", this); } }; } static class GraphBuilder { public GraphBuilder(Stub stub) { this.graph = new StructuredGraph(stub.toString(), null); graph.replaceFixed(graph.start(), graph.add(new StubStartNode(stub))); this.lastFixedNode = graph.start(); } final StructuredGraph graph; private FixedWithNextNode lastFixedNode; <T extends FloatingNode> T add(T node) { return graph.unique(node); } <T extends FixedNode> T append(T node) { T result = graph.add(node); assert lastFixedNode != null; assert result.predecessor() == null; graph.addAfterFixed(lastFixedNode, result); if (result instanceof FixedWithNextNode) { lastFixedNode = (FixedWithNextNode) result; } else { lastFixedNode = null; } return result; } } /** * Creates a graph for this stub. * <p> * If the stub returns an object, the graph created corresponds to this pseudo code: * * <pre> * Object foreignFunctionStub(args...) { * foreignFunction(currentThread, args); * if (clearPendingException(thread())) { * getAndClearObjectResult(thread()); * DeoptimizeCallerNode.deopt(InvalidateReprofile, RuntimeConstraint); * } * return verifyObject(getAndClearObjectResult(thread())); * } * </pre> * * If the stub returns a primitive or word, the graph created corresponds to this pseudo code * (using {@code int} as the primitive return type): * * <pre> * int foreignFunctionStub(args...) { * int result = foreignFunction(currentThread, args); * if (clearPendingException(thread())) { * DeoptimizeCallerNode.deopt(InvalidateReprofile, RuntimeConstraint); * } * return result; * } * </pre> * * If the stub is void, the graph created corresponds to this pseudo code: * * <pre> * void foreignFunctionStub(args...) { * foreignFunction(currentThread, args); * if (clearPendingException(thread())) { * DeoptimizeCallerNode.deopt(InvalidateReprofile, RuntimeConstraint); * } * } * </pre> * * In each example above, the {@code currentThread} argument is the C++ JavaThread value (i.e., * %r15 on AMD64) and is only prepended if {@link #prependThread} is true. */ @Override protected StructuredGraph getGraph() { Class<?>[] args = linkage.getDescriptor().getArgumentTypes(); boolean isObjectResult = linkage.getOutgoingCallingConvention().getReturn().getKind() == Kind.Object; GraphBuilder builder = new GraphBuilder(this); LocalNode[] locals = createLocals(builder, args); List<InvokeNode> invokes = new ArrayList<>(3); ReadRegisterNode thread = prependThread || isObjectResult ? builder.append(new ReadRegisterNode(runtime.threadRegister(), true, false)) : null; ValueNode result = createTargetCall(builder, locals, thread); invokes.add(createInvoke(builder, StubUtil.class, "handlePendingException", ConstantNode.forBoolean(isObjectResult, builder.graph))); if (isObjectResult) { InvokeNode object = createInvoke(builder, HotSpotReplacementsUtil.class, "getAndClearObjectResult", thread); result = createInvoke(builder, StubUtil.class, "verifyObject", object); invokes.add(object); invokes.add((InvokeNode) result); } builder.append(new ReturnNode(linkage.getDescriptor().getResultType() == void.class ? null : result)); if (Debug.isDumpEnabled()) { Debug.dump(builder.graph, "Initial stub graph"); } /* Rewrite all word types that can come in from the method argument types. */ new WordTypeRewriterPhase(runtime, wordKind()).apply(builder.graph); /* Inline all method calls that are create above. */ for (InvokeNode invoke : invokes) { inline(invoke); } /* Clean up all code that is now dead after inlining. */ new DeadCodeEliminationPhase().apply(builder.graph); assert builder.graph.getNodes().filter(InvokeNode.class).isEmpty(); if (Debug.isDumpEnabled()) { Debug.dump(builder.graph, "Stub graph before compilation"); } return builder.graph; } private LocalNode[] createLocals(GraphBuilder builder, Class<?>[] args) { LocalNode[] locals = new LocalNode[args.length]; ResolvedJavaType accessingClass = runtime.lookupJavaType(getClass()); for (int i = 0; i < args.length; i++) { ResolvedJavaType type = runtime.lookupJavaType(args[i]).resolve(accessingClass); Kind kind = type.getKind().getStackKind(); Stamp stamp; if (kind == Kind.Object) { stamp = StampFactory.declared(type); } else { stamp = StampFactory.forKind(type.getKind()); } LocalNode local = builder.add(new LocalNode(i, stamp)); locals[i] = local; } return locals; } private InvokeNode createInvoke(GraphBuilder builder, Class<?> declaringClass, String name, ValueNode... hpeArgs) { ResolvedJavaMethod method = null; for (Method m : declaringClass.getDeclaredMethods()) { if (Modifier.isStatic(m.getModifiers()) && m.getName().equals(name)) { assert method == null : "found more than one method in " + declaringClass + " named " + name; method = runtime.lookupJavaMethod(m); } } assert method != null : "did not find method in " + declaringClass + " named " + name; JavaType returnType = method.getSignature().getReturnType(null); MethodCallTargetNode callTarget = builder.graph.add(new MethodCallTargetNode(InvokeKind.Static, method, hpeArgs, returnType)); InvokeNode invoke = builder.append(new InvokeNode(callTarget, FrameState.UNKNOWN_BCI)); return invoke; } private StubForeignCallNode createTargetCall(GraphBuilder builder, LocalNode[] locals, ReadRegisterNode thread) { if (prependThread) { ValueNode[] targetArguments = new ValueNode[1 + locals.length]; targetArguments[0] = thread; System.arraycopy(locals, 0, targetArguments, 1, locals.length); return builder.append(new StubForeignCallNode(runtime, target.getDescriptor(), targetArguments)); } else { return builder.append(new StubForeignCallNode(runtime, target.getDescriptor(), locals)); } } private void inline(InvokeNode invoke) { ResolvedJavaMethod method = ((MethodCallTargetNode) invoke.callTarget()).targetMethod(); ReplacementsImpl repl = new ReplacementsImpl(runtime, new Assumptions(false), runtime.getTarget()); StructuredGraph calleeGraph = repl.makeGraph(method, null, null); InliningUtil.inline(invoke, calleeGraph, false); } }