jdk.internal.jvmci.hotspot

Class HotSpotMethodData

java.lang.Object

jdk.internal.jvmci.hotspot.HotSpotMethodData

public final class HotSpotMethodData
extends Object

Access to a HotSpot MethodData structure (defined in methodData.hpp).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	HotSpotMethodData.AbstractMethodData
private static class	HotSpotMethodData.AbstractTypeData
private static class	HotSpotMethodData.ArgInfoData
private static class	HotSpotMethodData.ArrayData
private static class	HotSpotMethodData.BitData
private static class	HotSpotMethodData.BranchData
private static class	HotSpotMethodData.CounterData
private static class	HotSpotMethodData.JumpData
private static class	HotSpotMethodData.MultiBranchData
private static class	HotSpotMethodData.NoMethodData
(package private) static class	HotSpotMethodData.RawItemProfile<T>
private static class	HotSpotMethodData.RetData
private static class	HotSpotMethodData.TypeCheckData
private static class	HotSpotMethodData.VirtualCallData

Field Summary

Fields

Modifier and Type	Field and Description
private static HotSpotVMConfig	config
private long	metaspaceMethodData Reference to the C++ MethodData object.
private static HotSpotMethodDataAccessor	NO_DATA_EXCEPTION_POSSIBLY_NOT_RECORDED_ACCESSOR
private static HotSpotMethodDataAccessor	NO_DATA_NO_EXCEPTION_ACCESSOR
private static HotSpotMethodDataAccessor[]	PROFILE_DATA_ACCESSORS

Constructor Summary

Constructors

Constructor and Description
HotSpotMethodData(long metaspaceMethodData)

Method Summary

Modifier and Type	Method and Description
private static int	cellIndexToOffset(int cells)
private static int	cellsToBytes(int cells)
private static int	computeFullOffset(int position, int offsetInBytes)
private int	extraDataSize() Returns the size of the extra data records.
int	getCompiledIRSize()
private HotSpotMethodDataAccessor	getData(int position)
int	getDeoptimizationCount(DeoptimizationReason reason)
HotSpotMethodDataAccessor	getExtraData(int position)
int	getExtraDataBeginOffset()
static HotSpotMethodDataAccessor	getNoDataAccessor(boolean exceptionPossiblyNotRecorded)
HotSpotMethodDataAccessor	getNormalData(int position)
int	getOSRDeoptimizationCount(DeoptimizationReason reason)
boolean	hasExtraData()
boolean	hasNormalData()
boolean	isProfileMature() Returns whether profiling ran long enough that the profile information is mature.
boolean	isWithin(int position)
private int	normalDataSize()
private int	readInt(int position, int offsetInBytes) Since the values are stored in cells (platform words) this method uses Unsafe.getAddress(long) to read the right value on both little and big endian machines.
private int	readUnsignedByte(int position, int offsetInBytes)
private long	readUnsignedInt(int position, int offsetInBytes) Since the values are stored in cells (platform words) this method uses Unsafe.getAddress(long) to read the right value on both little and big endian machines.
private int	readUnsignedIntAsSignedInt(int position, int offsetInBytes)
private int	readUnsignedShort(int position, int offsetInBytes)
private long	readWord(int position, int offsetInBytes)
void	setCompiledIRSize(int size)
String	toString()
private static int	truncateLongToInt(long value)

Methods inherited from class java.lang.Object

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

Field Detail

config

private static final HotSpotVMConfig config

NO_DATA_NO_EXCEPTION_ACCESSOR

private static final HotSpotMethodDataAccessor NO_DATA_NO_EXCEPTION_ACCESSOR

NO_DATA_EXCEPTION_POSSIBLY_NOT_RECORDED_ACCESSOR

private static final HotSpotMethodDataAccessor NO_DATA_EXCEPTION_POSSIBLY_NOT_RECORDED_ACCESSOR

PROFILE_DATA_ACCESSORS

private static final HotSpotMethodDataAccessor[] PROFILE_DATA_ACCESSORS

metaspaceMethodData

private final long metaspaceMethodData

Reference to the C++ MethodData object.

Constructor Detail

HotSpotMethodData

public HotSpotMethodData(long metaspaceMethodData)

Method Detail

normalDataSize

private int normalDataSize()

Returns:

value of the MethodData::_data_size field

extraDataSize

private int extraDataSize()

Returns the size of the extra data records. This method does the same calculation as MethodData::extra_data_size().

Returns:

size of extra data records

hasNormalData

public boolean hasNormalData()

hasExtraData

public boolean hasExtraData()

getExtraDataBeginOffset

public int getExtraDataBeginOffset()

isWithin

public boolean isWithin(int position)

getDeoptimizationCount

public int getDeoptimizationCount(DeoptimizationReason reason)

getOSRDeoptimizationCount

public int getOSRDeoptimizationCount(DeoptimizationReason reason)

getNormalData

public HotSpotMethodDataAccessor getNormalData(int position)

getExtraData

public HotSpotMethodDataAccessor getExtraData(int position)

getNoDataAccessor

public static HotSpotMethodDataAccessor getNoDataAccessor(boolean exceptionPossiblyNotRecorded)

getData

private HotSpotMethodDataAccessor getData(int position)

readUnsignedByte

private int readUnsignedByte(int position,
                             int offsetInBytes)

readUnsignedShort

private int readUnsignedShort(int position,
                              int offsetInBytes)

readUnsignedInt

private long readUnsignedInt(int position,
                             int offsetInBytes)

Since the values are stored in cells (platform words) this method uses Unsafe.getAddress(long) to read the right value on both little and big endian machines.

readUnsignedIntAsSignedInt

private int readUnsignedIntAsSignedInt(int position,
                                       int offsetInBytes)

readInt

private int readInt(int position,
                    int offsetInBytes)

Since the values are stored in cells (platform words) this method uses Unsafe.getAddress(long) to read the right value on both little and big endian machines.

readWord

private long readWord(int position,
                      int offsetInBytes)

truncateLongToInt

private static int truncateLongToInt(long value)

computeFullOffset

private static int computeFullOffset(int position,
                                     int offsetInBytes)

cellIndexToOffset

private static int cellIndexToOffset(int cells)

cellsToBytes

private static int cellsToBytes(int cells)

isProfileMature

public boolean isProfileMature()

Returns whether profiling ran long enough that the profile information is mature. Other informational data will still be valid even if the profile isn't mature.

toString

public String toString()

Overrides:

toString in class Object

setCompiledIRSize

public void setCompiledIRSize(int size)

getCompiledIRSize

public int getCompiledIRSize()