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view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/stubs/NewArrayStub.java @ 7530:5e3d1a68664e
applied mx eclipseformat to all Java files
author | Doug Simon <doug.simon@oracle.com> |
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date | Wed, 23 Jan 2013 16:34:57 +0100 |
parents | fe9f252f0d05 |
children | 630ea5001e33 |
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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.snippets.HotSpotSnippetUtils.*; import static com.oracle.graal.hotspot.snippets.NewObjectSnippets.*; import static com.oracle.graal.hotspot.stubs.NewInstanceStub.*; import com.oracle.graal.api.code.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.hotspot.meta.*; import com.oracle.graal.hotspot.nodes.*; import com.oracle.graal.hotspot.snippets.*; import com.oracle.graal.snippets.*; import com.oracle.graal.snippets.Snippet.ConstantParameter; import com.oracle.graal.snippets.Snippet.Parameter; import com.oracle.graal.snippets.SnippetTemplate.Key; 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 for to complete the allocation. */ public class NewArrayStub extends Stub { public NewArrayStub(final HotSpotRuntime runtime, Assumptions assumptions, TargetDescription target) { super(runtime, assumptions, target, NewArrayStubCall.NEW_ARRAY); } @Override protected void populateKey(Key key) { HotSpotResolvedObjectType intArrayType = (HotSpotResolvedObjectType) runtime.lookupJavaType(int[].class); Constant intArrayHub = intArrayType.klass(); key.add("intArrayHub", intArrayHub).add("log", 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} * @param log specifies if logging is enabled */ @Snippet private static Object newArray(@Parameter("hub") Word hub, @Parameter("length") int length, @ConstantParameter("intArrayHub") Word intArrayHub, @ConstantParameter("log") boolean log) { int layoutHelper = hub.readInt(layoutHelperOffset()); int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift()) & layoutHelperLog2ElementSizeMask(); int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift()) & layoutHelperHeaderSizeMask(); int elementKind = (layoutHelper >> layoutHelperElementTypeShift()) & layoutHelperElementTypeMask(); int sizeInBytes = computeArrayAllocationSize(length, wordSize(), headerSize, log2ElementSize); log(log, "newArray: element kind %d\n", elementKind); log(log, "newArray: array length %d\n", length); log(log, "newArray: array size %d\n", sizeInBytes); log(log, "newArray: hub=%p\n", hub); // check that array length is small enough for fast path. if (length <= MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH) { Word memory = refillAllocate(intArrayHub, sizeInBytes, log); if (memory != Word.zero()) { log(log, "newArray: allocated new array at %p\n", memory); formatArray(hub, sizeInBytes, length, headerSize, memory, Word.unsigned(arrayPrototypeMarkWord()), true); return verifyOop(memory.toObject()); } } log(log, "newArray: calling new_array_slow", 0L); return verifyOop(NewArraySlowStubCall.call(hub, length)); } }