Modifier and Type	Class and Description
private static enum	ThreadSnapshot.BlockerLockType
private static enum	ThreadSnapshot.OwnedLockType Represents information about a locking operation.
private static record	ThreadSnapshot.ThreadBlocker
private static class	ThreadSnapshot.ThreadLock Represents a locking operation of a thread at a specific stack depth.

Modifier and Type	Field and Description
private ThreadSnapshot.ThreadBlocker	blocker
private Object	blockerObject
private int	blockerTypeOrdinal
private Thread	carrierThread
private static final ThreadSnapshot.ThreadLock[]	EMPTY_LOCKS
private static final StackTraceElement[]	EMPTY_STACK
private static final JavaLangAccess	JLA
private ThreadSnapshot.ThreadLock[]	locks
private String	name
private Thread	parkBlockerOwner
private StackTraceElement[]	stackTrace
private int	threadStatus

Access	Constructor and Description
private	ThreadSnapshot()

Method Summary

Modifier and Type	Method and Description
pack-priv Object	blockedOn() Returns the object that the thread is blocked on.
pack-priv Thread	carrierThread() If the thread is a mounted virtual thread then return its carrier.
private static native ThreadSnapshot	create(Thread thread)
private Object	getBlocker(ThreadSnapshot.BlockerLockType type)
public static ThreadSnapshot	Returns: the snapshot or `null` if the thread is not alive of(Thread thread) Take a snapshot of a Thread to get all information about the thread.
pack-priv Stream<Object>	ownedMonitorsAt(int depth) Returns the objects that the thread locked at the given depth.
pack-priv boolean	ownsMonitors() Returns true if the thread owns any object monitors.
pack-priv Object	parkBlocker() Returns the thread's parkBlocker.
pack-priv Thread	parkBlockerOwner() Returns the owner of the parkBlocker if the parkBlocker is an AbstractOwnableSynchronizer.
pack-priv StackTraceElement[]	stackTrace() Returns the thread stack trace.
pack-priv String	threadName() Returns the thread name.
pack-priv Thread.State	threadState() Returns the thread state.
pack-priv Object	waitingOn() Returns the object that the thread is waiting on.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

blocker	back to summary
private ThreadSnapshot.ThreadBlocker blocker

blockerObject	back to summary
private Object blockerObject

blockerTypeOrdinal	back to summary
private int blockerTypeOrdinal

carrierThread	back to summary
private Thread carrierThread

EMPTY_LOCKS	back to summary
private static final ThreadSnapshot.ThreadLock[] EMPTY_LOCKS

EMPTY_STACK	back to summary
private static final StackTraceElement[] EMPTY_STACK

JLA	back to summary
private static final JavaLangAccess JLA

locks	back to summary
private ThreadSnapshot.ThreadLock[] locks

name	back to summary
private String name

parkBlockerOwner	back to summary
private Thread parkBlockerOwner

stackTrace	back to summary
private StackTraceElement[] stackTrace

threadStatus	back to summary
private int threadStatus

Constructor Detail

ThreadSnapshot	back to summary
private ThreadSnapshot()

Method Detail

blockedOn	back to summary
pack-priv Object blockedOn() Returns the object that the thread is blocked on. Exceptions IllegalStateException: if not in the blocked state

blockedOn

back to summary

pack-priv Object blockedOn()

Returns the object that the thread is blocked on.

Exceptions

IllegalStateException:: if not in the blocked state

carrierThread	back to summary
pack-priv Thread carrierThread() If the thread is a mounted virtual thread then return its carrier.

create	back to summary
private static native ThreadSnapshot create(Thread thread)

getBlocker	back to summary
private Object getBlocker(ThreadSnapshot.BlockerLockType type)

of back to summary

of	back to summary
public static ThreadSnapshot of(Thread thread) Take a snapshot of a Thread to get all information about the thread. Returns:ThreadSnapshot the snapshot or `null` if the thread is not alive

public static ThreadSnapshot of(Thread thread)

Take a snapshot of a Thread to get all information about the thread.

Returns:ThreadSnapshot: the snapshot or null if the thread is not alive

ownedMonitorsAt	back to summary
pack-priv Stream<Object> ownedMonitorsAt(int depth) Returns the objects that the thread locked at the given depth. The stream will contain a null element for a monitor that has been eliminated.

ownsMonitors	back to summary
pack-priv boolean ownsMonitors() Returns true if the thread owns any object monitors.

parkBlocker	back to summary
pack-priv Object parkBlocker() Returns the thread's parkBlocker.

parkBlockerOwner	back to summary
pack-priv Thread parkBlockerOwner() Returns the owner of the parkBlocker if the parkBlocker is an AbstractOwnableSynchronizer.

stackTrace	back to summary
pack-priv StackTraceElement[] stackTrace() Returns the thread stack trace.

threadName	back to summary
pack-priv String threadName() Returns the thread name.

threadState	back to summary
pack-priv Thread.State threadState() Returns the thread state.

waitingOn	back to summary
pack-priv Object waitingOn() Returns the object that the thread is waiting on. Exceptions IllegalStateException: if not in the waiting state

waitingOn

back to summary

pack-priv Object waitingOn()

Returns the object that the thread is waiting on.

Exceptions

IllegalStateException:: if not in the waiting state

jdk.internal.vm back to summary

private final Enum ThreadSnapshot.BlockerLockType

Class Inheritance

extends Enum<ThreadSnapshot.BlockerLockType>

java.lang.Object
java.lang.Enum
jdk.internal.vm.ThreadSnapshot.BlockerLockType

Field Summary

Modifier and Type	Field and Description
public static final ThreadSnapshot.BlockerLockType	PARK_BLOCKER
public static final ThreadSnapshot.BlockerLockType	WAITING_ON
public static final ThreadSnapshot.BlockerLockType	WAITING_TO_LOCK

Constructor Summary

Access	Constructor and Description
private	BlockerLockType()

Method Summary

Modifier and Type	Method and Description
public static ThreadSnapshot.BlockerLockType	valueOf(String name)
public static ThreadSnapshot.BlockerLockType[]	values()

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

Field Detail

PARK_BLOCKER	back to summary
public static final ThreadSnapshot.BlockerLockType PARK_BLOCKER

WAITING_ON	back to summary
public static final ThreadSnapshot.BlockerLockType WAITING_ON

WAITING_TO_LOCK	back to summary
public static final ThreadSnapshot.BlockerLockType WAITING_TO_LOCK

Constructor Detail

BlockerLockType	back to summary
private BlockerLockType()

Method Detail

valueOf	back to summary
public static ThreadSnapshot.BlockerLockType valueOf(String name)

values	back to summary
public static ThreadSnapshot.BlockerLockType[] values()

jdk.internal.vm back to summary

private final Enum ThreadSnapshot.OwnedLockType

Class Inheritance

extends Enum<ThreadSnapshot.OwnedLockType>

java.lang.Object
java.lang.Enum
jdk.internal.vm.ThreadSnapshot.OwnedLockType

Represents information about a locking operation.

Field Summary

Modifier and Type	Field and Description
public static final ThreadSnapshot.OwnedLockType	ELIMINATED
public static final ThreadSnapshot.OwnedLockType	LOCKED

Constructor Summary

Access	Constructor and Description
private	OwnedLockType()

Method Summary

Modifier and Type	Method and Description
public static ThreadSnapshot.OwnedLockType	valueOf(String name)
public static ThreadSnapshot.OwnedLockType[]	values()

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

Field Detail

ELIMINATED	back to summary
public static final ThreadSnapshot.OwnedLockType ELIMINATED

LOCKED	back to summary
public static final ThreadSnapshot.OwnedLockType LOCKED

Constructor Detail

OwnedLockType	back to summary
private OwnedLockType()

Method Detail

valueOf	back to summary
public static ThreadSnapshot.OwnedLockType valueOf(String name)

values	back to summary
public static ThreadSnapshot.OwnedLockType[] values()

jdk.internal.vm back to summary

private final Record ThreadSnapshot.ThreadBlocker

Class Inheritance

extends Record

java.lang.Object
java.lang.Record
jdk.internal.vm.ThreadSnapshot.ThreadBlocker

Record Components

type:ThreadSnapshot.BlockerLockType
obj:Object
owner:Thread

Field Summary

Modifier and Type	Field and Description
private static final ThreadSnapshot.BlockerLockType[]	lockTypeValues
private final Object	obj Record Component accessed by obj().
private final Thread	owner Record Component accessed by owner().
private final ThreadSnapshot.BlockerLockType	type Record Component accessed by type().

Constructor Summary

Access	Constructor and Description
pack-priv	ThreadBlocker(int typeOrdinal, Object obj, Thread owner)
private	ThreadBlocker(ThreadSnapshot.BlockerLockType type, Object obj, Thread owner)

Method Summary

Modifier and Type	Method and Description
public final boolean	equals(Object o) Implements abstract java.lang.Record.equals. Indicates whether some other object is "equal to" this one.
public final int	hashCode() Implements abstract java.lang.Record.hashCode. Returns a hash code value for the record.
public Object	obj() Record Component getter of obj.
public Thread	owner() Record Component getter of owner.
public final String	toString() Implements abstract java.lang.Record.toString. Returns a string representation of the record.
public ThreadSnapshot.BlockerLockType	type() Record Component getter of type.

Field Detail

lockTypeValues	back to summary
private static final ThreadSnapshot.BlockerLockType[] lockTypeValues

obj	back to summary
private final Object obj Record Component accessed by obj().

owner	back to summary
private final Thread owner Record Component accessed by owner().

type	back to summary
private final ThreadSnapshot.BlockerLockType type Record Component accessed by type().

Constructor Detail

ThreadBlocker	back to summary
pack-priv ThreadBlocker(int typeOrdinal, Object obj, Thread owner)

ThreadBlocker	back to summary
private ThreadBlocker(ThreadSnapshot.BlockerLockType type, Object obj, Thread owner)

Method Detail

equals back to summary

public final boolean equals(Object o)

Implements abstract java.lang.Record.equals.

Doc from java.lang.Record.equals.

Indicates whether some other object is "equal to" this one. In addition to the general contract of Object.equals, record classes must further obey the invariant that when a record instance is "copied" by passing the result of the record component accessor methods to the canonical constructor, as follows:

    R copy = new R(r.c1(), r.c2(), ..., r.cn());

then it must be the case that r.equals(copy).

hashCode back to summary

public final int hashCode()

Implements abstract java.lang.Record.hashCode.

Doc from java.lang.Record.hashCode.

Returns a hash code value for the record. Obeys the general contract of Object.hashCode. For records, hashing behavior is constrained by the refined contract of Record.equals, so that any two records created from the same components must have the same hash code.

obj	back to summary
public Object obj() Record Component getter of obj.

owner	back to summary
public Thread owner() Record Component getter of owner.

toString back to summary

public final String toString()

Implements abstract java.lang.Record.toString.

Doc from java.lang.Record.toString.

Returns a string representation of the record. In accordance with the general contract of Object#toString(), the toString method returns a string that "textually represents" this record. The result should be a concise but informative representation that is easy for a person to read.

In addition to this general contract, record classes must further participate in the invariant that any two records which are equal must produce equal strings. This invariant is necessarily relaxed in the rare case where corresponding equal component values might fail to produce equal strings for themselves.

type	back to summary
public ThreadSnapshot.BlockerLockType type() Record Component getter of type.

jdk.internal.vm back to summary

private Class ThreadSnapshot.ThreadLock

Class Inheritance

extends Object

java.lang.Object
jdk.internal.vm.ThreadSnapshot.ThreadLock

Represents a locking operation of a thread at a specific stack depth.

Field Summary

Modifier and Type	Field and Description
private int	depth
private static final ThreadSnapshot.OwnedLockType[]	lockTypeValues
private Object	obj
private ThreadSnapshot.OwnedLockType	type
private int	typeOrdinal

Constructor Summary

Access	Constructor and Description
private	ThreadLock()

Method Summary

Modifier and Type	Method and Description
pack-priv int	depth()
pack-priv void	finishInit()
pack-priv Object	lockObject()
pack-priv ThreadSnapshot.OwnedLockType	type()

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

depth	back to summary
private int depth

lockTypeValues	back to summary
private static final ThreadSnapshot.OwnedLockType[] lockTypeValues

obj	back to summary
private Object obj

type	back to summary
private ThreadSnapshot.OwnedLockType type

typeOrdinal	back to summary
private int typeOrdinal

Constructor Detail

ThreadLock	back to summary
private ThreadLock()

Method Detail

depth	back to summary
pack-priv int depth()

finishInit	back to summary
pack-priv void finishInit()

lockObject	back to summary
pack-priv Object lockObject()

type	back to summary
pack-priv ThreadSnapshot.OwnedLockType type()

public Class ThreadSnapshot

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Enum ThreadSnapshot.BlockerLockType

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Enum ThreadSnapshot.OwnedLockType

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private final Record ThreadSnapshot.ThreadBlocker

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

private Class ThreadSnapshot.ThreadLock

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail