| /* |
| * Copyright (c) 2012, 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. |
| * |
| * 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.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayPrototypeMarkWord; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.getAndClearObjectResult; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.layoutHelperElementTypeMask; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.layoutHelperElementTypeShift; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.layoutHelperHeaderSizeMask; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.layoutHelperHeaderSizeShift; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.layoutHelperLog2ElementSizeMask; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.layoutHelperLog2ElementSizeShift; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.loadKlassLayoutHelperIntrinsic; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.registerAsWord; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.wordSize; |
| import static org.graalvm.compiler.hotspot.replacements.NewObjectSnippets.MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH; |
| import static org.graalvm.compiler.hotspot.replacements.NewObjectSnippets.formatArray; |
| import static org.graalvm.compiler.hotspot.stubs.NewInstanceStub.refillAllocate; |
| import static org.graalvm.compiler.hotspot.stubs.StubUtil.handlePendingException; |
| import static org.graalvm.compiler.hotspot.stubs.StubUtil.newDescriptor; |
| import static org.graalvm.compiler.hotspot.stubs.StubUtil.printf; |
| import static org.graalvm.compiler.hotspot.stubs.StubUtil.verifyObject; |
| import static jdk.vm.ci.hotspot.HotSpotMetaAccessProvider.computeArrayAllocationSize; |
| |
| import org.graalvm.compiler.api.replacements.Fold; |
| import org.graalvm.compiler.api.replacements.Snippet; |
| import org.graalvm.compiler.api.replacements.Snippet.ConstantParameter; |
| import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; |
| import org.graalvm.compiler.graph.Node.ConstantNodeParameter; |
| import org.graalvm.compiler.graph.Node.NodeIntrinsic; |
| import org.graalvm.compiler.hotspot.HotSpotForeignCallLinkage; |
| import org.graalvm.compiler.hotspot.meta.HotSpotProviders; |
| import org.graalvm.compiler.hotspot.nodes.GraalHotSpotVMConfigNode; |
| import org.graalvm.compiler.hotspot.nodes.StubForeignCallNode; |
| import org.graalvm.compiler.hotspot.nodes.type.KlassPointerStamp; |
| import org.graalvm.compiler.hotspot.replacements.NewObjectSnippets; |
| import org.graalvm.compiler.hotspot.word.KlassPointer; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.word.Word; |
| |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.hotspot.HotSpotResolvedObjectType; |
| |
| /** |
| * Stub implementing the fast path for TLAB refill during instance class allocation. This stub is |
| * called 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(HotSpotProviders providers, HotSpotForeignCallLinkage linkage) { |
| super("newArray", providers, linkage); |
| } |
| |
| @Override |
| protected Object[] makeConstArgs() { |
| HotSpotResolvedObjectType intArrayType = (HotSpotResolvedObjectType) providers.getMetaAccess().lookupJavaType(int[].class); |
| int count = method.getSignature().getParameterCount(false); |
| Object[] args = new Object[count]; |
| assert checkConstArg(3, "intArrayHub"); |
| assert checkConstArg(4, "threadRegister"); |
| args[3] = ConstantNode.forConstant(KlassPointerStamp.klassNonNull(), intArrayType.klass(), null); |
| args[4] = providers.getRegisters().getThreadRegister(); |
| return args; |
| } |
| |
| @Fold |
| static boolean logging() { |
| return StubOptions.TraceNewArrayStub.getValue(); |
| } |
| |
| /** |
| * 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 fillContents Should the array be filled with zeroes? |
| * @param intArrayHub the hub for {@code int[].class} |
| */ |
| @Snippet |
| private static Object newArray(KlassPointer hub, int length, boolean fillContents, @ConstantParameter KlassPointer intArrayHub, @ConstantParameter Register threadRegister) { |
| int layoutHelper = loadKlassLayoutHelperIntrinsic(hub); |
| int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift(INJECTED_VMCONFIG)) & layoutHelperLog2ElementSizeMask(INJECTED_VMCONFIG); |
| int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift(INJECTED_VMCONFIG)) & layoutHelperHeaderSizeMask(INJECTED_VMCONFIG); |
| int elementKind = (layoutHelper >> layoutHelperElementTypeShift(INJECTED_VMCONFIG)) & layoutHelperElementTypeMask(INJECTED_VMCONFIG); |
| 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.asWord().rawValue()); |
| } |
| |
| // check that array length is small enough for fast path. |
| Word thread = registerAsWord(threadRegister); |
| boolean inlineContiguousAllocationSupported = GraalHotSpotVMConfigNode.inlineContiguousAllocationSupported(); |
| if (inlineContiguousAllocationSupported && length >= 0 && length <= MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH) { |
| Word memory = refillAllocate(thread, 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(INJECTED_VMCONFIG)), fillContents, false, false)); |
| } |
| } |
| if (logging()) { |
| printf("newArray: calling new_array_c\n"); |
| } |
| |
| newArrayC(NEW_ARRAY_C, thread, hub, length); |
| handlePendingException(thread, true); |
| return verifyObject(getAndClearObjectResult(thread)); |
| } |
| |
| public static final ForeignCallDescriptor NEW_ARRAY_C = newDescriptor(NewArrayStub.class, "newArrayC", void.class, Word.class, KlassPointer.class, int.class); |
| |
| @NodeIntrinsic(StubForeignCallNode.class) |
| public static native void newArrayC(@ConstantNodeParameter ForeignCallDescriptor newArrayC, Word thread, KlassPointer hub, int length); |
| } |