| /* |
| * Copyright (c) 2012, 2016, 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.replacements; |
| |
| import static org.graalvm.compiler.core.common.GraalOptions.GeneratePIC; |
| import static org.graalvm.compiler.core.common.GraalOptions.SnippetCounters; |
| import static org.graalvm.compiler.core.common.calc.UnsignedMath.belowThan; |
| import static org.graalvm.compiler.hotspot.GraalHotSpotVMConfig.INJECTED_VMCONFIG; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.CLASS_ARRAY_KLASS_LOCATION; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.HUB_WRITE_LOCATION; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.MARK_WORD_LOCATION; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.PROTOTYPE_MARK_WORD_LOCATION; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.TLAB_END_LOCATION; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.TLAB_TOP_LOCATION; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayKlassOffset; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayLengthOffset; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.config; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.initializeObjectHeader; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.instanceHeaderSize; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.isInstanceKlassFullyInitialized; |
| 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.loadKlassFromObject; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.prototypeMarkWordOffset; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readLayoutHelper; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readTlabEnd; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.readTlabTop; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.registerAsWord; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.useBiasedLocking; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.useTLAB; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.verifyOop; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.wordSize; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.writeTlabTop; |
| import static org.graalvm.compiler.nodes.PiArrayNode.piArrayCast; |
| import static org.graalvm.compiler.nodes.PiNode.piCast; |
| import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.FAST_PATH_PROBABILITY; |
| import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.FREQUENT_PROBABILITY; |
| import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.SLOW_PATH_PROBABILITY; |
| import static org.graalvm.compiler.nodes.extended.BranchProbabilityNode.probability; |
| import static org.graalvm.compiler.replacements.ReplacementsUtil.REPLACEMENTS_ASSERTIONS_ENABLED; |
| import static org.graalvm.compiler.replacements.ReplacementsUtil.staticAssert; |
| import static org.graalvm.compiler.replacements.SnippetTemplate.DEFAULT_REPLACER; |
| import static org.graalvm.compiler.replacements.nodes.CStringConstant.cstring; |
| import static org.graalvm.compiler.replacements.nodes.ExplodeLoopNode.explodeLoop; |
| import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayBaseOffset; |
| 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.api.replacements.Snippet.VarargsParameter; |
| import org.graalvm.compiler.core.common.LocationIdentity; |
| import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; |
| import org.graalvm.compiler.core.common.type.StampFactory; |
| import org.graalvm.compiler.debug.Debug; |
| import org.graalvm.compiler.debug.GraalError; |
| import org.graalvm.compiler.graph.Node.ConstantNodeParameter; |
| import org.graalvm.compiler.graph.Node.NodeIntrinsic; |
| import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; |
| import org.graalvm.compiler.hotspot.HotSpotBackend; |
| import org.graalvm.compiler.hotspot.meta.HotSpotProviders; |
| import org.graalvm.compiler.hotspot.meta.HotSpotRegistersProvider; |
| import org.graalvm.compiler.hotspot.nodes.DimensionsNode; |
| import org.graalvm.compiler.hotspot.nodes.aot.LoadConstantIndirectlyFixedNode; |
| import org.graalvm.compiler.hotspot.nodes.aot.LoadConstantIndirectlyNode; |
| import org.graalvm.compiler.hotspot.nodes.type.KlassPointerStamp; |
| import org.graalvm.compiler.hotspot.replacements.aot.ResolveConstantSnippets; |
| import org.graalvm.compiler.hotspot.word.KlassPointer; |
| import org.graalvm.compiler.nodes.ConstantNode; |
| import org.graalvm.compiler.nodes.DeoptimizeNode; |
| import org.graalvm.compiler.nodes.NamedLocationIdentity; |
| import org.graalvm.compiler.nodes.PrefetchAllocateNode; |
| import org.graalvm.compiler.nodes.StructuredGraph; |
| import org.graalvm.compiler.nodes.ValueNode; |
| import org.graalvm.compiler.nodes.debug.DynamicCounterNode; |
| import org.graalvm.compiler.nodes.debug.VerifyHeapNode; |
| import org.graalvm.compiler.nodes.extended.BranchProbabilityNode; |
| import org.graalvm.compiler.nodes.extended.ForeignCallNode; |
| import org.graalvm.compiler.nodes.extended.MembarNode; |
| import org.graalvm.compiler.nodes.java.DynamicNewArrayNode; |
| import org.graalvm.compiler.nodes.java.DynamicNewInstanceNode; |
| import org.graalvm.compiler.nodes.java.NewArrayNode; |
| import org.graalvm.compiler.nodes.java.NewInstanceNode; |
| import org.graalvm.compiler.nodes.java.NewMultiArrayNode; |
| import org.graalvm.compiler.nodes.memory.address.OffsetAddressNode; |
| import org.graalvm.compiler.nodes.spi.LoweringTool; |
| import org.graalvm.compiler.nodes.util.GraphUtil; |
| import org.graalvm.compiler.replacements.ReplacementsUtil; |
| import org.graalvm.compiler.replacements.SnippetCounter; |
| import org.graalvm.compiler.replacements.SnippetTemplate; |
| import org.graalvm.compiler.replacements.SnippetTemplate.AbstractTemplates; |
| import org.graalvm.compiler.replacements.SnippetTemplate.Arguments; |
| import org.graalvm.compiler.replacements.SnippetTemplate.SnippetInfo; |
| import org.graalvm.compiler.replacements.Snippets; |
| import org.graalvm.compiler.replacements.nodes.ExplodeLoopNode; |
| import org.graalvm.compiler.word.Word; |
| |
| import jdk.vm.ci.code.CodeUtil; |
| import jdk.vm.ci.code.MemoryBarriers; |
| import jdk.vm.ci.code.Register; |
| import jdk.vm.ci.code.TargetDescription; |
| import jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider; |
| import jdk.vm.ci.hotspot.HotSpotResolvedObjectType; |
| import jdk.vm.ci.meta.DeoptimizationAction; |
| import jdk.vm.ci.meta.DeoptimizationReason; |
| import jdk.vm.ci.meta.JavaKind; |
| import jdk.vm.ci.meta.ResolvedJavaType; |
| |
| /** |
| * Snippets used for implementing NEW, ANEWARRAY and NEWARRAY. |
| */ |
| public class NewObjectSnippets implements Snippets { |
| |
| public static final LocationIdentity INIT_LOCATION = NamedLocationIdentity.mutable("Initialization"); |
| |
| enum ProfileContext { |
| AllocatingMethod, |
| InstanceOrArray, |
| AllocatedType, |
| AllocatedTypesInMethod, |
| Total |
| } |
| |
| @Fold |
| static String createName(String path, String typeContext) { |
| switch (HotspotSnippetsOptions.ProfileAllocationsContext.getValue()) { |
| case AllocatingMethod: |
| return ""; |
| case InstanceOrArray: |
| return path; |
| case AllocatedType: |
| case AllocatedTypesInMethod: |
| return typeContext; |
| case Total: |
| return "bytes"; |
| default: |
| throw GraalError.shouldNotReachHere(); |
| } |
| } |
| |
| @Fold |
| static boolean doProfile() { |
| return HotspotSnippetsOptions.ProfileAllocations.getValue(); |
| } |
| |
| @Fold |
| static boolean withContext() { |
| ProfileContext context = HotspotSnippetsOptions.ProfileAllocationsContext.getValue(); |
| return context == ProfileContext.AllocatingMethod || context == ProfileContext.AllocatedTypesInMethod; |
| } |
| |
| protected static void profileAllocation(String path, long size, String typeContext) { |
| if (doProfile()) { |
| String name = createName(path, typeContext); |
| |
| boolean context = withContext(); |
| DynamicCounterNode.counter(name, "number of bytes allocated", size, context); |
| DynamicCounterNode.counter(name, "number of allocations", 1, context); |
| } |
| } |
| |
| public static void emitPrefetchAllocate(Word address, boolean isArray) { |
| GraalHotSpotVMConfig config = config(INJECTED_VMCONFIG); |
| if (config.allocatePrefetchStyle > 0) { |
| // Insert a prefetch for each allocation only on the fast-path |
| // Generate several prefetch instructions. |
| int lines = isArray ? config.allocatePrefetchLines : config.allocateInstancePrefetchLines; |
| int stepSize = config.allocatePrefetchStepSize; |
| int distance = config.allocatePrefetchDistance; |
| ExplodeLoopNode.explodeLoop(); |
| for (int i = 0; i < lines; i++) { |
| PrefetchAllocateNode.prefetch(OffsetAddressNode.address(address, distance)); |
| distance += stepSize; |
| } |
| } |
| } |
| |
| @Snippet |
| public static Object allocateInstance(@ConstantParameter int size, KlassPointer hub, Word prototypeMarkWord, @ConstantParameter boolean fillContents, @ConstantParameter Register threadRegister, |
| @ConstantParameter boolean constantSize, @ConstantParameter String typeContext) { |
| Object result; |
| Word thread = registerAsWord(threadRegister); |
| Word top = readTlabTop(thread); |
| Word end = readTlabEnd(thread); |
| Word newTop = top.add(size); |
| if (useTLAB(INJECTED_VMCONFIG) && probability(FAST_PATH_PROBABILITY, newTop.belowOrEqual(end))) { |
| writeTlabTop(thread, newTop); |
| emitPrefetchAllocate(newTop, false); |
| result = formatObject(hub, size, top, prototypeMarkWord, fillContents, constantSize, true); |
| } else { |
| new_stub.inc(); |
| result = newInstance(HotSpotBackend.NEW_INSTANCE, hub); |
| } |
| profileAllocation("instance", size, typeContext); |
| return piCast(verifyOop(result), StampFactory.forNodeIntrinsic()); |
| } |
| |
| @NodeIntrinsic(value = ForeignCallNode.class, returnStampIsNonNull = true) |
| public static native Object newInstance(@ConstantNodeParameter ForeignCallDescriptor descriptor, KlassPointer hub); |
| |
| @Snippet |
| public static Object allocateInstancePIC(@ConstantParameter int size, KlassPointer hub, Word prototypeMarkWord, @ConstantParameter boolean fillContents, |
| @ConstantParameter Register threadRegister, |
| @ConstantParameter boolean constantSize, @ConstantParameter String typeContext) { |
| // Klass must be initialized by the time the first instance is allocated, therefore we can |
| // just load it from the corresponding cell and avoid the resolution check. We have to use a |
| // fixed load though, to prevent it from floating above the initialization. |
| KlassPointer picHub = LoadConstantIndirectlyFixedNode.loadKlass(hub); |
| return allocateInstance(size, picHub, prototypeMarkWord, fillContents, threadRegister, constantSize, typeContext); |
| } |
| |
| @Snippet |
| public static Object allocateInstanceDynamic(Class<?> type, Class<?> classClass, @ConstantParameter boolean fillContents, @ConstantParameter Register threadRegister) { |
| if (probability(SLOW_PATH_PROBABILITY, type == null || DynamicNewInstanceNode.throwsInstantiationException(type, classClass))) { |
| DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint); |
| } |
| |
| KlassPointer hub = ClassGetHubNode.readClass(type); |
| if (probability(FAST_PATH_PROBABILITY, !hub.isNull())) { |
| if (probability(FAST_PATH_PROBABILITY, isInstanceKlassFullyInitialized(hub))) { |
| int layoutHelper = readLayoutHelper(hub); |
| /* |
| * src/share/vm/oops/klass.hpp: For instances, layout helper is a positive number, |
| * the instance size. This size is already passed through align_object_size and |
| * scaled to bytes. The low order bit is set if instances of this class cannot be |
| * allocated using the fastpath. |
| */ |
| if (probability(FAST_PATH_PROBABILITY, (layoutHelper & 1) == 0)) { |
| Word prototypeMarkWord = hub.readWord(prototypeMarkWordOffset(INJECTED_VMCONFIG), PROTOTYPE_MARK_WORD_LOCATION); |
| /* |
| * FIXME(je,ds): we should actually pass typeContext instead of "" but late |
| * binding of parameters is not yet supported by the GraphBuilderPlugin system. |
| */ |
| return allocateInstance(layoutHelper, hub, prototypeMarkWord, fillContents, threadRegister, false, ""); |
| } |
| } |
| } |
| return dynamicNewInstanceStub(type); |
| } |
| |
| /** |
| * Maximum array length for which fast path allocation is used. |
| */ |
| public static final int MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH = 0x00FFFFFF; |
| |
| @Snippet |
| public static Object allocatePrimitiveArrayPIC(KlassPointer hub, int length, Word prototypeMarkWord, @ConstantParameter int headerSize, @ConstantParameter int log2ElementSize, |
| @ConstantParameter boolean fillContents, @ConstantParameter Register threadRegister, @ConstantParameter boolean maybeUnroll, @ConstantParameter String typeContext) { |
| KlassPointer picHub = LoadConstantIndirectlyNode.loadKlass(hub); |
| return allocateArrayImpl(picHub, length, prototypeMarkWord, headerSize, log2ElementSize, fillContents, threadRegister, maybeUnroll, typeContext, false); |
| } |
| |
| @Snippet |
| public static Object allocateArrayPIC(KlassPointer hub, int length, Word prototypeMarkWord, @ConstantParameter int headerSize, @ConstantParameter int log2ElementSize, |
| @ConstantParameter boolean fillContents, @ConstantParameter Register threadRegister, @ConstantParameter boolean maybeUnroll, @ConstantParameter String typeContext) { |
| KlassPointer picHub = ResolveConstantSnippets.resolveKlassConstant(hub); |
| return allocateArrayImpl(picHub, length, prototypeMarkWord, headerSize, log2ElementSize, fillContents, threadRegister, maybeUnroll, typeContext, false); |
| } |
| |
| @Snippet |
| public static Object allocateArray(KlassPointer hub, int length, Word prototypeMarkWord, @ConstantParameter int headerSize, @ConstantParameter int log2ElementSize, |
| @ConstantParameter boolean fillContents, @ConstantParameter Register threadRegister, @ConstantParameter boolean maybeUnroll, @ConstantParameter String typeContext) { |
| Object result = allocateArrayImpl(hub, length, prototypeMarkWord, headerSize, log2ElementSize, fillContents, threadRegister, maybeUnroll, typeContext, false); |
| return piArrayCast(verifyOop(result), length, StampFactory.forNodeIntrinsic()); |
| } |
| |
| private static Object allocateArrayImpl(KlassPointer hub, int length, Word prototypeMarkWord, int headerSize, int log2ElementSize, boolean fillContents, |
| @ConstantParameter Register threadRegister, |
| @ConstantParameter boolean maybeUnroll, String typeContext, boolean skipNegativeCheck) { |
| Object result; |
| int alignment = wordSize(); |
| int allocationSize = computeArrayAllocationSize(length, alignment, headerSize, log2ElementSize); |
| Word thread = registerAsWord(threadRegister); |
| Word top = readTlabTop(thread); |
| Word end = readTlabEnd(thread); |
| Word newTop = top.add(allocationSize); |
| if (probability(FREQUENT_PROBABILITY, skipNegativeCheck || belowThan(length, MAX_ARRAY_FAST_PATH_ALLOCATION_LENGTH)) && useTLAB(INJECTED_VMCONFIG) && |
| probability(FAST_PATH_PROBABILITY, newTop.belowOrEqual(end))) { |
| writeTlabTop(thread, newTop); |
| emitPrefetchAllocate(newTop, true); |
| newarray_loopInit.inc(); |
| result = formatArray(hub, allocationSize, length, headerSize, top, prototypeMarkWord, fillContents, maybeUnroll, true); |
| } else { |
| result = newArray(HotSpotBackend.NEW_ARRAY, hub, length, fillContents); |
| } |
| profileAllocation("array", allocationSize, typeContext); |
| return result; |
| } |
| |
| @NodeIntrinsic(value = ForeignCallNode.class, returnStampIsNonNull = true) |
| public static native Object newArray(@ConstantNodeParameter ForeignCallDescriptor descriptor, KlassPointer hub, int length, boolean fillContents); |
| |
| public static final ForeignCallDescriptor DYNAMIC_NEW_ARRAY = new ForeignCallDescriptor("dynamic_new_array", Object.class, Class.class, int.class); |
| public static final ForeignCallDescriptor DYNAMIC_NEW_INSTANCE = new ForeignCallDescriptor("dynamic_new_instance", Object.class, Class.class); |
| |
| @NodeIntrinsic(value = ForeignCallNode.class, returnStampIsNonNull = true) |
| public static native Object dynamicNewArrayStub(@ConstantNodeParameter ForeignCallDescriptor descriptor, Class<?> elementType, int length); |
| |
| public static Object dynamicNewInstanceStub(Class<?> elementType) { |
| return dynamicNewInstanceStubCall(DYNAMIC_NEW_INSTANCE, elementType); |
| } |
| |
| @NodeIntrinsic(value = ForeignCallNode.class, returnStampIsNonNull = true) |
| public static native Object dynamicNewInstanceStubCall(@ConstantNodeParameter ForeignCallDescriptor descriptor, Class<?> elementType); |
| |
| @Snippet |
| public static Object allocateArrayDynamic(Class<?> elementType, Class<?> voidClass, int length, @ConstantParameter boolean fillContents, @ConstantParameter Register threadRegister, |
| @ConstantParameter JavaKind knownElementKind, @ConstantParameter int knownLayoutHelper, Word prototypeMarkWord) { |
| Object result = allocateArrayDynamicImpl(elementType, voidClass, length, fillContents, threadRegister, knownElementKind, knownLayoutHelper, prototypeMarkWord); |
| return result; |
| } |
| |
| private static Object allocateArrayDynamicImpl(Class<?> elementType, Class<?> voidClass, int length, boolean fillContents, Register threadRegister, JavaKind knownElementKind, |
| int knownLayoutHelper, Word prototypeMarkWord) { |
| /* |
| * We only need the dynamic check for void when we have no static information from |
| * knownElementKind. |
| */ |
| staticAssert(knownElementKind != JavaKind.Void, "unsupported knownElementKind"); |
| if (knownElementKind == JavaKind.Illegal && probability(SLOW_PATH_PROBABILITY, elementType == null || DynamicNewArrayNode.throwsIllegalArgumentException(elementType, voidClass))) { |
| DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint); |
| } |
| |
| KlassPointer klass = loadKlassFromObject(elementType, arrayKlassOffset(INJECTED_VMCONFIG), CLASS_ARRAY_KLASS_LOCATION); |
| if (probability(BranchProbabilityNode.NOT_FREQUENT_PROBABILITY, klass.isNull() || length < 0)) { |
| DeoptimizeNode.deopt(DeoptimizationAction.None, DeoptimizationReason.RuntimeConstraint); |
| } |
| int layoutHelper = knownElementKind != JavaKind.Illegal ? knownLayoutHelper : readLayoutHelper(klass); |
| //@formatter:off |
| // from src/share/vm/oops/klass.hpp: |
| // |
| // For arrays, layout helper is a negative number, containing four |
| // distinct bytes, as follows: |
| // MSB:[tag, hsz, ebt, log2(esz)]:LSB |
| // where: |
| // tag is 0x80 if the elements are oops, 0xC0 if non-oops |
| // hsz is array header size in bytes (i.e., offset of first element) |
| // ebt is the BasicType of the elements |
| // esz is the element size in bytes |
| //@formatter:on |
| |
| int headerSize = (layoutHelper >> layoutHelperHeaderSizeShift(INJECTED_VMCONFIG)) & layoutHelperHeaderSizeMask(INJECTED_VMCONFIG); |
| int log2ElementSize = (layoutHelper >> layoutHelperLog2ElementSizeShift(INJECTED_VMCONFIG)) & layoutHelperLog2ElementSizeMask(INJECTED_VMCONFIG); |
| |
| Object result = allocateArrayImpl(klass, length, prototypeMarkWord, headerSize, log2ElementSize, fillContents, threadRegister, false, "dynamic type", true); |
| return piArrayCast(verifyOop(result), length, StampFactory.forNodeIntrinsic()); |
| } |
| |
| /** |
| * Calls the runtime stub for implementing MULTIANEWARRAY. |
| */ |
| @Snippet |
| public static Object newmultiarray(KlassPointer hub, @ConstantParameter int rank, @VarargsParameter int[] dimensions) { |
| Word dims = DimensionsNode.allocaDimsArray(rank); |
| ExplodeLoopNode.explodeLoop(); |
| for (int i = 0; i < rank; i++) { |
| dims.writeInt(i * 4, dimensions[i], INIT_LOCATION); |
| } |
| return newArrayCall(HotSpotBackend.NEW_MULTI_ARRAY, hub, rank, dims); |
| } |
| |
| @Snippet |
| public static Object newmultiarrayPIC(KlassPointer hub, @ConstantParameter int rank, @VarargsParameter int[] dimensions) { |
| KlassPointer hubPIC = ResolveConstantSnippets.resolveKlassConstant(hub); |
| return newmultiarray(hubPIC, rank, dimensions); |
| } |
| |
| @NodeIntrinsic(value = ForeignCallNode.class, returnStampIsNonNull = true) |
| public static native Object newArrayCall(@ConstantNodeParameter ForeignCallDescriptor descriptor, KlassPointer hub, int rank, Word dims); |
| |
| /** |
| * Maximum number of long stores to emit when zeroing an object with a constant size. Larger |
| * objects have their bodies initialized in a loop. |
| */ |
| private static final int MAX_UNROLLED_OBJECT_ZEROING_STORES = 8; |
| |
| /** |
| * Zero uninitialized memory in a newly allocated object, unrolling as necessary and ensuring |
| * that stores are aligned. |
| * |
| * @param size number of bytes to zero |
| * @param memory beginning of object which is being zeroed |
| * @param constantSize is {@code size} known to be constant in the snippet |
| * @param startOffset offset to begin zeroing. May not be word aligned. |
| * @param manualUnroll maximally unroll zeroing |
| */ |
| private static void zeroMemory(int size, Word memory, boolean constantSize, int startOffset, boolean manualUnroll, boolean useSnippetCounters) { |
| fillMemory(0, size, memory, constantSize, startOffset, manualUnroll, useSnippetCounters); |
| } |
| |
| private static void fillMemory(long value, int size, Word memory, boolean constantSize, int startOffset, boolean manualUnroll, boolean useSnippetCounters) { |
| ReplacementsUtil.runtimeAssert((size & 0x7) == 0, "unaligned object size"); |
| int offset = startOffset; |
| if ((offset & 0x7) != 0) { |
| memory.writeInt(offset, (int) value, INIT_LOCATION); |
| offset += 4; |
| } |
| ReplacementsUtil.runtimeAssert((offset & 0x7) == 0, "unaligned offset"); |
| if (manualUnroll && ((size - offset) / 8) <= MAX_UNROLLED_OBJECT_ZEROING_STORES) { |
| ReplacementsUtil.staticAssert(!constantSize, "size shouldn't be constant at instantiation time"); |
| // This case handles arrays of constant length. Instead of having a snippet variant for |
| // each length, generate a chain of stores of maximum length. Once it's inlined the |
| // break statement will trim excess stores. |
| if (useSnippetCounters) { |
| new_seqInit.inc(); |
| } |
| explodeLoop(); |
| for (int i = 0; i < MAX_UNROLLED_OBJECT_ZEROING_STORES; i++, offset += 8) { |
| if (offset == size) { |
| break; |
| } |
| memory.initializeLong(offset, value, INIT_LOCATION); |
| } |
| } else { |
| // Use Word instead of int to avoid extension to long in generated code |
| Word off = Word.signed(offset); |
| if (constantSize && ((size - offset) / 8) <= MAX_UNROLLED_OBJECT_ZEROING_STORES) { |
| if (useSnippetCounters) { |
| new_seqInit.inc(); |
| } |
| explodeLoop(); |
| } else { |
| if (useSnippetCounters) { |
| new_loopInit.inc(); |
| } |
| } |
| for (; off.rawValue() < size; off = off.add(8)) { |
| memory.initializeLong(off, value, INIT_LOCATION); |
| } |
| } |
| } |
| |
| /** |
| * Fill uninitialized memory with garbage value in a newly allocated object, unrolling as |
| * necessary and ensuring that stores are aligned. |
| * |
| * @param size number of bytes to zero |
| * @param memory beginning of object which is being zeroed |
| * @param constantSize is {@code size} known to be constant in the snippet |
| * @param startOffset offset to begin zeroing. May not be word aligned. |
| * @param manualUnroll maximally unroll zeroing |
| */ |
| private static void fillWithGarbage(int size, Word memory, boolean constantSize, int startOffset, boolean manualUnroll, boolean useSnippetCounters) { |
| fillMemory(0xfefefefefefefefeL, size, memory, constantSize, startOffset, manualUnroll, useSnippetCounters); |
| } |
| |
| /** |
| * Formats some allocated memory with an object header and zeroes out the rest. Disables asserts |
| * since they can't be compiled in stubs. |
| */ |
| public static Object formatObjectForStub(KlassPointer hub, int size, Word memory, Word compileTimePrototypeMarkWord) { |
| return formatObject(hub, size, memory, compileTimePrototypeMarkWord, true, false, false); |
| } |
| |
| /** |
| * Formats some allocated memory with an object header and zeroes out the rest. |
| */ |
| protected static Object formatObject(KlassPointer hub, int size, Word memory, Word compileTimePrototypeMarkWord, boolean fillContents, boolean constantSize, boolean useSnippetCounters) { |
| Word prototypeMarkWord = useBiasedLocking(INJECTED_VMCONFIG) ? hub.readWord(prototypeMarkWordOffset(INJECTED_VMCONFIG), PROTOTYPE_MARK_WORD_LOCATION) : compileTimePrototypeMarkWord; |
| initializeObjectHeader(memory, prototypeMarkWord, hub); |
| if (fillContents) { |
| zeroMemory(size, memory, constantSize, instanceHeaderSize(INJECTED_VMCONFIG), false, useSnippetCounters); |
| } else if (REPLACEMENTS_ASSERTIONS_ENABLED) { |
| fillWithGarbage(size, memory, constantSize, instanceHeaderSize(INJECTED_VMCONFIG), false, useSnippetCounters); |
| } |
| MembarNode.memoryBarrier(MemoryBarriers.STORE_STORE, INIT_LOCATION); |
| return memory.toObject(); |
| } |
| |
| @Snippet |
| protected static void verifyHeap(@ConstantParameter Register threadRegister) { |
| Word thread = registerAsWord(threadRegister); |
| Word topValue = readTlabTop(thread); |
| if (!topValue.equal(Word.zero())) { |
| Word topValueContents = topValue.readWord(0, MARK_WORD_LOCATION); |
| if (topValueContents.equal(Word.zero())) { |
| AssertionSnippets.vmMessageC(AssertionSnippets.ASSERTION_VM_MESSAGE_C, true, cstring("overzeroing of TLAB detected"), 0L, 0L, 0L); |
| } |
| } |
| } |
| |
| /** |
| * Formats some allocated memory with an object header and zeroes out the rest. |
| */ |
| public static Object formatArray(KlassPointer hub, int allocationSize, int length, int headerSize, Word memory, Word prototypeMarkWord, boolean fillContents, boolean maybeUnroll, |
| boolean useSnippetCounters) { |
| memory.writeInt(arrayLengthOffset(INJECTED_VMCONFIG), length, INIT_LOCATION); |
| /* |
| * store hub last as the concurrent garbage collectors assume length is valid if hub field |
| * is not null |
| */ |
| initializeObjectHeader(memory, prototypeMarkWord, hub); |
| if (fillContents) { |
| zeroMemory(allocationSize, memory, false, headerSize, maybeUnroll, useSnippetCounters); |
| } else if (REPLACEMENTS_ASSERTIONS_ENABLED) { |
| fillWithGarbage(allocationSize, memory, false, headerSize, maybeUnroll, useSnippetCounters); |
| } |
| MembarNode.memoryBarrier(MemoryBarriers.STORE_STORE, INIT_LOCATION); |
| return memory.toObject(); |
| } |
| |
| public static class Templates extends AbstractTemplates { |
| |
| private final SnippetInfo allocateInstance = snippet(NewObjectSnippets.class, "allocateInstance", INIT_LOCATION, MARK_WORD_LOCATION, HUB_WRITE_LOCATION, TLAB_TOP_LOCATION, TLAB_END_LOCATION); |
| private final SnippetInfo allocateInstancePIC = snippet(NewObjectSnippets.class, "allocateInstancePIC", INIT_LOCATION, MARK_WORD_LOCATION, HUB_WRITE_LOCATION, TLAB_TOP_LOCATION, |
| TLAB_END_LOCATION); |
| private final SnippetInfo allocateArray = snippet(NewObjectSnippets.class, "allocateArray", INIT_LOCATION, MARK_WORD_LOCATION, HUB_WRITE_LOCATION, TLAB_TOP_LOCATION, TLAB_END_LOCATION); |
| private final SnippetInfo allocateArrayPIC = snippet(NewObjectSnippets.class, "allocateArrayPIC", INIT_LOCATION, MARK_WORD_LOCATION, HUB_WRITE_LOCATION, TLAB_TOP_LOCATION, TLAB_END_LOCATION); |
| private final SnippetInfo allocatePrimitiveArrayPIC = snippet(NewObjectSnippets.class, "allocatePrimitiveArrayPIC", INIT_LOCATION, MARK_WORD_LOCATION, HUB_WRITE_LOCATION, TLAB_TOP_LOCATION, |
| TLAB_END_LOCATION); |
| private final SnippetInfo allocateArrayDynamic = snippet(NewObjectSnippets.class, "allocateArrayDynamic", INIT_LOCATION, MARK_WORD_LOCATION, HUB_WRITE_LOCATION, TLAB_TOP_LOCATION, |
| TLAB_END_LOCATION); |
| private final SnippetInfo allocateInstanceDynamic = snippet(NewObjectSnippets.class, "allocateInstanceDynamic", INIT_LOCATION, MARK_WORD_LOCATION, HUB_WRITE_LOCATION, TLAB_TOP_LOCATION, |
| TLAB_END_LOCATION); |
| private final SnippetInfo newmultiarray = snippet(NewObjectSnippets.class, "newmultiarray", INIT_LOCATION, TLAB_TOP_LOCATION, TLAB_END_LOCATION); |
| private final SnippetInfo newmultiarrayPIC = snippet(NewObjectSnippets.class, "newmultiarrayPIC", INIT_LOCATION, TLAB_TOP_LOCATION, TLAB_END_LOCATION); |
| private final SnippetInfo verifyHeap = snippet(NewObjectSnippets.class, "verifyHeap"); |
| private final GraalHotSpotVMConfig config; |
| |
| public Templates(HotSpotProviders providers, TargetDescription target, GraalHotSpotVMConfig config) { |
| super(providers, providers.getSnippetReflection(), target); |
| this.config = config; |
| } |
| |
| /** |
| * Lowers a {@link NewInstanceNode}. |
| */ |
| public void lower(NewInstanceNode newInstanceNode, HotSpotRegistersProvider registers, LoweringTool tool) { |
| StructuredGraph graph = newInstanceNode.graph(); |
| HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) newInstanceNode.instanceClass(); |
| assert !type.isArray(); |
| ConstantNode hub = ConstantNode.forConstant(KlassPointerStamp.klassNonNull(), type.klass(), providers.getMetaAccess(), graph); |
| int size = instanceSize(type); |
| |
| SnippetInfo snippet = GeneratePIC.getValue() ? allocateInstancePIC : allocateInstance; |
| Arguments args = new Arguments(snippet, graph.getGuardsStage(), tool.getLoweringStage()); |
| args.addConst("size", size); |
| args.add("hub", hub); |
| args.add("prototypeMarkWord", type.prototypeMarkWord()); |
| args.addConst("fillContents", newInstanceNode.fillContents()); |
| args.addConst("threadRegister", registers.getThreadRegister()); |
| args.addConst("constantSize", true); |
| args.addConst("typeContext", HotspotSnippetsOptions.ProfileAllocations.getValue() ? type.toJavaName(false) : ""); |
| |
| SnippetTemplate template = template(args); |
| Debug.log("Lowering allocateInstance in %s: node=%s, template=%s, arguments=%s", graph, newInstanceNode, template, args); |
| template.instantiate(providers.getMetaAccess(), newInstanceNode, DEFAULT_REPLACER, args); |
| } |
| |
| /** |
| * Lowers a {@link NewArrayNode}. |
| */ |
| public void lower(NewArrayNode newArrayNode, HotSpotRegistersProvider registers, LoweringTool tool) { |
| StructuredGraph graph = newArrayNode.graph(); |
| ResolvedJavaType elementType = newArrayNode.elementType(); |
| HotSpotResolvedObjectType arrayType = (HotSpotResolvedObjectType) elementType.getArrayClass(); |
| JavaKind elementKind = elementType.getJavaKind(); |
| ConstantNode hub = ConstantNode.forConstant(KlassPointerStamp.klassNonNull(), arrayType.klass(), providers.getMetaAccess(), graph); |
| final int headerSize = getArrayBaseOffset(elementKind); |
| int log2ElementSize = CodeUtil.log2(HotSpotJVMCIRuntimeProvider.getArrayIndexScale(elementKind)); |
| |
| SnippetInfo snippet; |
| if (GeneratePIC.getValue()) { |
| if (elementType.isPrimitive()) { |
| snippet = allocatePrimitiveArrayPIC; |
| } else { |
| snippet = allocateArrayPIC; |
| } |
| } else { |
| snippet = allocateArray; |
| } |
| |
| Arguments args = new Arguments(snippet, graph.getGuardsStage(), tool.getLoweringStage()); |
| args.add("hub", hub); |
| ValueNode length = newArrayNode.length(); |
| args.add("length", length.isAlive() ? length : graph.addOrUniqueWithInputs(length)); |
| assert arrayType.prototypeMarkWord() == lookupArrayClass(tool, JavaKind.Object).prototypeMarkWord() : "all array types are assumed to have the same prototypeMarkWord"; |
| args.add("prototypeMarkWord", arrayType.prototypeMarkWord()); |
| args.addConst("headerSize", headerSize); |
| args.addConst("log2ElementSize", log2ElementSize); |
| args.addConst("fillContents", newArrayNode.fillContents()); |
| args.addConst("threadRegister", registers.getThreadRegister()); |
| args.addConst("maybeUnroll", length.isConstant()); |
| args.addConst("typeContext", HotspotSnippetsOptions.ProfileAllocations.getValue() ? arrayType.toJavaName(false) : ""); |
| SnippetTemplate template = template(args); |
| Debug.log("Lowering allocateArray in %s: node=%s, template=%s, arguments=%s", graph, newArrayNode, template, args); |
| template.instantiate(providers.getMetaAccess(), newArrayNode, DEFAULT_REPLACER, args); |
| } |
| |
| public void lower(DynamicNewInstanceNode newInstanceNode, HotSpotRegistersProvider registers, LoweringTool tool) { |
| Arguments args = new Arguments(allocateInstanceDynamic, newInstanceNode.graph().getGuardsStage(), tool.getLoweringStage()); |
| args.add("type", newInstanceNode.getInstanceType()); |
| ValueNode classClass = newInstanceNode.getClassClass(); |
| assert classClass != null; |
| args.add("classClass", classClass); |
| args.addConst("fillContents", newInstanceNode.fillContents()); |
| args.addConst("threadRegister", registers.getThreadRegister()); |
| |
| SnippetTemplate template = template(args); |
| template.instantiate(providers.getMetaAccess(), newInstanceNode, DEFAULT_REPLACER, args); |
| } |
| |
| public void lower(DynamicNewArrayNode newArrayNode, HotSpotRegistersProvider registers, LoweringTool tool) { |
| StructuredGraph graph = newArrayNode.graph(); |
| Arguments args = new Arguments(allocateArrayDynamic, newArrayNode.graph().getGuardsStage(), tool.getLoweringStage()); |
| args.add("elementType", newArrayNode.getElementType()); |
| ValueNode voidClass = newArrayNode.getVoidClass(); |
| assert voidClass != null; |
| args.add("voidClass", voidClass); |
| ValueNode length = newArrayNode.length(); |
| args.add("length", length.isAlive() ? length : graph.addOrUniqueWithInputs(length)); |
| args.addConst("fillContents", newArrayNode.fillContents()); |
| args.addConst("threadRegister", registers.getThreadRegister()); |
| /* |
| * We use Kind.Illegal as a marker value instead of null because constant snippet |
| * parameters cannot be null. |
| */ |
| args.addConst("knownElementKind", newArrayNode.getKnownElementKind() == null ? JavaKind.Illegal : newArrayNode.getKnownElementKind()); |
| if (newArrayNode.getKnownElementKind() != null) { |
| args.addConst("knownLayoutHelper", lookupArrayClass(tool, newArrayNode.getKnownElementKind()).layoutHelper()); |
| } else { |
| args.addConst("knownLayoutHelper", 0); |
| } |
| args.add("prototypeMarkWord", lookupArrayClass(tool, JavaKind.Object).prototypeMarkWord()); |
| SnippetTemplate template = template(args); |
| template.instantiate(providers.getMetaAccess(), newArrayNode, DEFAULT_REPLACER, args); |
| } |
| |
| private static HotSpotResolvedObjectType lookupArrayClass(LoweringTool tool, JavaKind kind) { |
| return (HotSpotResolvedObjectType) tool.getMetaAccess().lookupJavaType(kind == JavaKind.Object ? Object.class : kind.toJavaClass()).getArrayClass(); |
| } |
| |
| public void lower(NewMultiArrayNode newmultiarrayNode, LoweringTool tool) { |
| StructuredGraph graph = newmultiarrayNode.graph(); |
| int rank = newmultiarrayNode.dimensionCount(); |
| ValueNode[] dims = new ValueNode[rank]; |
| for (int i = 0; i < newmultiarrayNode.dimensionCount(); i++) { |
| dims[i] = newmultiarrayNode.dimension(i); |
| } |
| HotSpotResolvedObjectType type = (HotSpotResolvedObjectType) newmultiarrayNode.type(); |
| ConstantNode hub = ConstantNode.forConstant(KlassPointerStamp.klassNonNull(), type.klass(), providers.getMetaAccess(), graph); |
| |
| SnippetInfo snippet = GeneratePIC.getValue() ? newmultiarrayPIC : newmultiarray; |
| Arguments args = new Arguments(snippet, graph.getGuardsStage(), tool.getLoweringStage()); |
| args.add("hub", hub); |
| args.addConst("rank", rank); |
| args.addVarargs("dimensions", int.class, StampFactory.forKind(JavaKind.Int), dims); |
| template(args).instantiate(providers.getMetaAccess(), newmultiarrayNode, DEFAULT_REPLACER, args); |
| } |
| |
| private static int instanceSize(HotSpotResolvedObjectType type) { |
| int size = type.instanceSize(); |
| assert size >= 0; |
| return size; |
| } |
| |
| public void lower(VerifyHeapNode verifyHeapNode, HotSpotRegistersProvider registers, LoweringTool tool) { |
| if (config.cAssertions) { |
| Arguments args = new Arguments(verifyHeap, verifyHeapNode.graph().getGuardsStage(), tool.getLoweringStage()); |
| args.addConst("threadRegister", registers.getThreadRegister()); |
| |
| SnippetTemplate template = template(args); |
| template.instantiate(providers.getMetaAccess(), verifyHeapNode, DEFAULT_REPLACER, args); |
| } else { |
| GraphUtil.removeFixedWithUnusedInputs(verifyHeapNode); |
| } |
| } |
| } |
| |
| private static final SnippetCounter.Group countersNew = SnippetCounters.getValue() ? new SnippetCounter.Group("NewInstance") : null; |
| private static final SnippetCounter new_seqInit = new SnippetCounter(countersNew, "tlabSeqInit", "TLAB alloc with unrolled zeroing"); |
| private static final SnippetCounter new_loopInit = new SnippetCounter(countersNew, "tlabLoopInit", "TLAB alloc with zeroing in a loop"); |
| private static final SnippetCounter new_stub = new SnippetCounter(countersNew, "stub", "alloc and zeroing via stub"); |
| |
| private static final SnippetCounter.Group countersNewArray = SnippetCounters.getValue() ? new SnippetCounter.Group("NewArray") : null; |
| private static final SnippetCounter newarray_loopInit = new SnippetCounter(countersNewArray, "tlabLoopInit", "TLAB alloc with zeroing in a loop"); |
| private static final SnippetCounter newarray_stub = new SnippetCounter(countersNewArray, "stub", "alloc and zeroing via stub"); |
| } |
