Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/NewArrayStub.java @ 22255:565196752144
KlassPointerStamp needs valid getStackKind implementation
author | Tom Rodriguez <tom.rodriguez@oracle.com> |
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date | Mon, 20 Jul 2015 11:18:35 -0700 |
parents | 0e095e2c24e2 |
children | e02fa353e88c |
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/* * Copyright (c) 2012, 2014, 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.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 static jdk.internal.jvmci.hotspot.HotSpotMetaAccessProvider.*; import jdk.internal.jvmci.code.*; import jdk.internal.jvmci.hotspot.*; import jdk.internal.jvmci.meta.*; import com.oracle.graal.api.replacements.*; 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.hotspot.word.*; import com.oracle.graal.nodes.*; import com.oracle.graal.replacements.*; import com.oracle.graal.replacements.Snippet.ConstantParameter; import com.oracle.graal.word.*; /** * 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(2, "intArrayHub"); assert checkConstArg(3, "threadRegister"); args[2] = ConstantNode.forConstant(providers.getStampProvider().createHubStamp(true), intArrayType.klass(), null); args[3] = providers.getRegisters().getThreadRegister(); 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(KlassPointer hub, int length, @ConstantParameter KlassPointer intArrayHub, @ConstantParameter Register threadRegister) { int layoutHelper = loadKlassLayoutHelperIntrinsic(hub); 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.asWord().rawValue()); } // check that array length is small enough for fast path. Word thread = registerAsWord(threadRegister); if (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()), true, 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); }