Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/NewArrayStub.java @ 9793:b4f12c603be5
added support for the runtime to specify for each foreign call whether it is re-executable and what memory locations it kills
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 22 May 2013 16:27:25 +0200 |
parents | 82e3c8d5c77f |
children | 4391fd907278 |
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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.hotspot.HotSpotGraalRuntime.*; import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*; import static com.oracle.graal.hotspot.replacements.NewObjectSnippets.*; import static com.oracle.graal.hotspot.stubs.NewInstanceStub.*; import static com.oracle.graal.hotspot.stubs.StubUtil.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.graph.Node.ConstantNodeParameter; import com.oracle.graal.graph.Node.NodeIntrinsic; import com.oracle.graal.hotspot.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.hotspot.nodes.*; import com.oracle.graal.hotspot.replacements.*; import com.oracle.graal.nodes.extended.*; import com.oracle.graal.nodes.spi.*; import com.oracle.graal.replacements.*; import com.oracle.graal.replacements.Snippet.ConstantParameter; import com.oracle.graal.replacements.Snippet.Fold; import com.oracle.graal.replacements.SnippetTemplate.Arguments; import com.oracle.graal.replacements.SnippetTemplate.SnippetInfo; import com.oracle.graal.word.*; /** * Stub implementing the fast path for TLAB refill during instance class allocation. This stub is * called via {@link NewArrayStubCall} from the {@linkplain NewObjectSnippets inline} allocation * code when TLAB allocation fails. If this stub fails to refill the TLAB or allocate the object, it * calls out to the HotSpot C++ runtime to complete the allocation. */ public class NewArrayStub extends SnippetStub { public NewArrayStub(final HotSpotRuntime runtime, Replacements replacements, TargetDescription target, HotSpotForeignCallLinkage linkage) { super(runtime, replacements, target, linkage); } @Override protected Arguments makeArguments(SnippetInfo stub) { HotSpotResolvedObjectType intArrayType = (HotSpotResolvedObjectType) runtime.lookupJavaType(int[].class); // RuntimeStub cannot (currently) support oops or metadata embedded in the code so we // convert the hub (i.e., Klass*) for int[] to be a naked word. This should be safe since // the int[] class will never be unloaded. Constant intArrayHub = intArrayType.klass(); intArrayHub = Constant.forIntegerKind(graalRuntime().getTarget().wordKind, intArrayHub.asLong(), null); Arguments args = new Arguments(stub); args.add("hub", null); args.add("length", null); args.addConst("intArrayHub", intArrayHub); return args; } @Fold private static boolean logging() { return Boolean.getBoolean("graal.logNewArrayStub"); } /** * Re-attempts allocation after an initial TLAB allocation failed or was skipped (e.g., due to * -XX:-UseTLAB). * * @param hub the hub of the object to be allocated * @param length the length of the array * @param intArrayHub the hub for {@code int[].class} */ @Snippet private static Object newArray(Word hub, int length, @ConstantParameter Word intArrayHub) { int layoutHelper = hub.readInt(layoutHelperOffset(), LocationIdentity.FINAL_LOCATION); int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift()) & layoutHelperLog2ElementSizeMask(); int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift()) & layoutHelperHeaderSizeMask(); int elementKind = (layoutHelper >> layoutHelperElementTypeShift()) & layoutHelperElementTypeMask(); int sizeInBytes = computeArrayAllocationSize(length, wordSize(), headerSize, log2ElementSize); if (logging()) { printf("newArray: element kind %d\n", elementKind); printf("newArray: array length %d\n", length); printf("newArray: array size %d\n", sizeInBytes); printf("newArray: hub=%p\n", hub.rawValue()); } // check that array length is small enough for fast path. if (length <= MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH) { Word memory = refillAllocate(intArrayHub, sizeInBytes, logging()); if (memory.notEqual(0)) { if (logging()) { printf("newArray: allocated new array at %p\n", memory.rawValue()); } return verifyObject(formatArray(hub, sizeInBytes, length, headerSize, memory, Word.unsigned(arrayPrototypeMarkWord()), true)); } } if (logging()) { printf("newArray: calling new_array_c\n"); } newArrayC(NEW_ARRAY_C, thread(), hub, length); handlePendingException(true); return verifyObject(getAndClearObjectResult(thread())); } public static final ForeignCallDescriptor NEW_ARRAY_C = descriptorFor(NewArrayStub.class, "newArrayC"); @NodeIntrinsic(ForeignCallNode.class) public static native void newArrayC(@ConstantNodeParameter ForeignCallDescriptor newArrayC, Word thread, Word hub, int length); }