org.graalvm.compiler.replacements

Class AllocationSnippets

java.lang.Object

org.graalvm.compiler.replacements.AllocationSnippets

All Implemented Interfaces:

Snippets

Direct Known Subclasses:

HotSpotAllocationSnippets

public abstract class AllocationSnippets
extends Object
implements Snippets

Snippets used for implementing NEW, ANEWARRAY and NEWARRAY.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AllocationSnippets.AllocationProfilingData
static class	AllocationSnippets.AllocationSnippetCounters
static class	AllocationSnippets.FillContent

Constructor Summary

Constructors

Constructor and Description
AllocationSnippets()

Method Summary

Modifier and Type	Method and Description
Object	allocateArrayImpl(Word hub, int length, int arrayBaseOffset, int log2ElementSize, AllocationSnippets.FillContent fillContents, int fillStartOffset, boolean emitMemoryBarrier, boolean maybeUnroll, boolean supportsBulkZeroing, boolean supportsOptimizedFilling, AllocationSnippets.AllocationProfilingData profilingData)
protected Object	allocateInstanceImpl(Word hub, org.graalvm.word.UnsignedWord size, AllocationSnippets.FillContent fillContents, boolean emitMemoryBarrier, boolean constantSize, AllocationSnippets.AllocationProfilingData profilingData)
protected org.graalvm.word.UnsignedWord	arrayAllocationSize(int length, int arrayBaseOffset, int log2ElementSize)
static long	arrayAllocationSize(int length, int arrayBaseOffset, int log2ElementSize, int alignment) We do an unsigned multiplication so that a negative array length will result in an array size greater than Integer.MAX_VALUE.
abstract int	arrayLengthOffset()
protected abstract Object	callNewArrayStub(Word hub, int length, int fillStartOffset)
protected abstract Object	callNewInstanceStub(Word hub)
protected abstract Object	callNewMultiArrayStub(Word hub, int rank, Word dims)
protected void	emitMemoryBarrierIf(boolean emitMemoryBarrier)
void	emitPrefetchAllocate(Word address, boolean isArray)
protected void	fillMemoryAligned(long value, Word memory, org.graalvm.word.UnsignedWord fromOffset, org.graalvm.word.UnsignedWord endOffset, boolean isEndOffsetConstant, org.graalvm.word.UnsignedWord remainingSize, boolean supportsBulkZeroing, boolean supportsOptimizedFilling, AllocationSnippets.AllocationSnippetCounters snippetCounters)
protected void	fillMemoryAlignedUnrollable(long value, Word memory, org.graalvm.word.UnsignedWord fromOffset, org.graalvm.word.UnsignedWord endOffset, boolean supportsOptimizedFilling, AllocationSnippets.AllocationSnippetCounters snippetCounters)
Object	formatArray(Word hub, org.graalvm.word.UnsignedWord allocationSize, int length, Word memory, AllocationSnippets.FillContent fillContents, int fillStartOffset, boolean emitMemoryBarrier, boolean maybeUnroll, boolean supportsBulkZeroing, boolean supportsOptimizedFilling, AllocationSnippets.AllocationSnippetCounters snippetCounters) Formats some allocated memory with an object header and zeroes out the rest.
Object	formatObject(Word hub, org.graalvm.word.UnsignedWord size, Word memory, AllocationSnippets.FillContent fillContents, boolean emitMemoryBarrier, boolean constantSize, AllocationSnippets.AllocationSnippetCounters snippetCounters) Formats some allocated memory with an object header and zeroes out the rest.
protected abstract int	getMinimalBulkZeroingSize()
protected abstract int	getPrefetchDistance()
protected abstract int	getPrefetchLines(boolean isArray)
protected abstract int	getPrefetchStepSize()
protected abstract int	getPrefetchStyle()
abstract Word	getTLABInfo()
abstract void	initializeObjectHeader(Word memory, Word hub, boolean isArray)
protected abstract int	instanceHeaderSize()
protected Object	newMultiArrayImpl(Word hub, int rank, int[] dimensions)
protected abstract int	objectAlignment()
protected abstract void	profileAllocation(AllocationSnippets.AllocationProfilingData profilingData, org.graalvm.word.UnsignedWord size)
abstract Word	readTlabEnd(Word tlabInfo)
abstract Word	readTlabTop(Word tlabInfo)
protected abstract boolean	shouldAllocateInTLAB(org.graalvm.word.UnsignedWord allocationSize, boolean isArray)
abstract boolean	useTLAB()
protected abstract Object	verifyOop(Object obj)
abstract void	writeTlabTop(Word tlabInfo, Word newTop)

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AllocationSnippets

public AllocationSnippets()

Method Detail

allocateInstanceImpl

protected Object allocateInstanceImpl(Word hub,
                                      org.graalvm.word.UnsignedWord size,
                                      AllocationSnippets.FillContent fillContents,
                                      boolean emitMemoryBarrier,
                                      boolean constantSize,
                                      AllocationSnippets.AllocationProfilingData profilingData)

allocateArrayImpl

public Object allocateArrayImpl(Word hub,
                                int length,
                                int arrayBaseOffset,
                                int log2ElementSize,
                                AllocationSnippets.FillContent fillContents,
                                int fillStartOffset,
                                boolean emitMemoryBarrier,
                                boolean maybeUnroll,
                                boolean supportsBulkZeroing,
                                boolean supportsOptimizedFilling,
                                AllocationSnippets.AllocationProfilingData profilingData)

newMultiArrayImpl

protected Object newMultiArrayImpl(Word hub,
                                   int rank,
                                   int[] dimensions)

arrayAllocationSize

protected org.graalvm.word.UnsignedWord arrayAllocationSize(int length,
                                                            int arrayBaseOffset,
                                                            int log2ElementSize)

arrayAllocationSize

public static long arrayAllocationSize(int length,
                                       int arrayBaseOffset,
                                       int log2ElementSize,
                                       int alignment)

We do an unsigned multiplication so that a negative array length will result in an array size greater than Integer.MAX_VALUE.

fillMemoryAlignedUnrollable

protected void fillMemoryAlignedUnrollable(long value,
                                           Word memory,
                                           org.graalvm.word.UnsignedWord fromOffset,
                                           org.graalvm.word.UnsignedWord endOffset,
                                           boolean supportsOptimizedFilling,
                                           AllocationSnippets.AllocationSnippetCounters snippetCounters)

fillMemoryAligned

protected void fillMemoryAligned(long value,
                                 Word memory,
                                 org.graalvm.word.UnsignedWord fromOffset,
                                 org.graalvm.word.UnsignedWord endOffset,
                                 boolean isEndOffsetConstant,
                                 org.graalvm.word.UnsignedWord remainingSize,
                                 boolean supportsBulkZeroing,
                                 boolean supportsOptimizedFilling,
                                 AllocationSnippets.AllocationSnippetCounters snippetCounters)

formatObject

public Object formatObject(Word hub,
                           org.graalvm.word.UnsignedWord size,
                           Word memory,
                           AllocationSnippets.FillContent fillContents,
                           boolean emitMemoryBarrier,
                           boolean constantSize,
                           AllocationSnippets.AllocationSnippetCounters snippetCounters)

Formats some allocated memory with an object header and zeroes out the rest.

formatArray

public Object formatArray(Word hub,
                          org.graalvm.word.UnsignedWord allocationSize,
                          int length,
                          Word memory,
                          AllocationSnippets.FillContent fillContents,
                          int fillStartOffset,
                          boolean emitMemoryBarrier,
                          boolean maybeUnroll,
                          boolean supportsBulkZeroing,
                          boolean supportsOptimizedFilling,
                          AllocationSnippets.AllocationSnippetCounters snippetCounters)

Formats some allocated memory with an object header and zeroes out the rest.

emitMemoryBarrierIf

protected void emitMemoryBarrierIf(boolean emitMemoryBarrier)

emitPrefetchAllocate

public void emitPrefetchAllocate(Word address,
                                 boolean isArray)

getPrefetchStyle

protected abstract int getPrefetchStyle()

getPrefetchLines

protected abstract int getPrefetchLines(boolean isArray)

getPrefetchStepSize

protected abstract int getPrefetchStepSize()

getPrefetchDistance

protected abstract int getPrefetchDistance()

useTLAB

public abstract boolean useTLAB()

shouldAllocateInTLAB

protected abstract boolean shouldAllocateInTLAB(org.graalvm.word.UnsignedWord allocationSize,
                                                boolean isArray)

getTLABInfo

public abstract Word getTLABInfo()

readTlabTop

public abstract Word readTlabTop(Word tlabInfo)

readTlabEnd

public abstract Word readTlabEnd(Word tlabInfo)

writeTlabTop

public abstract void writeTlabTop(Word tlabInfo,
                                  Word newTop)

instanceHeaderSize

protected abstract int instanceHeaderSize()

initializeObjectHeader

public abstract void initializeObjectHeader(Word memory,
                                            Word hub,
                                            boolean isArray)

callNewInstanceStub

protected abstract Object callNewInstanceStub(Word hub)

callNewArrayStub

protected abstract Object callNewArrayStub(Word hub,
                                           int length,
                                           int fillStartOffset)

callNewMultiArrayStub

protected abstract Object callNewMultiArrayStub(Word hub,
                                                int rank,
                                                Word dims)

getMinimalBulkZeroingSize

protected abstract int getMinimalBulkZeroingSize()

profileAllocation

protected abstract void profileAllocation(AllocationSnippets.AllocationProfilingData profilingData,
                                          org.graalvm.word.UnsignedWord size)

verifyOop

protected abstract Object verifyOop(Object obj)

arrayLengthOffset

public abstract int arrayLengthOffset()

objectAlignment

protected abstract int objectAlignment()