OpenJDK 27 · sun.jvm.hotspot.runtime.JavaThread · APIdia, the JavaDoc alternative

Field Summary

Modifier and Type	Field and Description
private static JavaThreadPDAccess	access
private static AddressField	activeHandlesField
private static final String	ADDRESS_FORMAT
private static AddressField	anchorField
private static int	BLOCKED
private static int	BLOCKED_TRANS
private static AddressField	contEntryField
private static final boolean	DEBUG
private static int	EXITING
private static int	IN_JAVA
private static int	IN_JAVA_TRANS
private static int	IN_NATIVE
private static int	IN_NATIVE_TRANS
private static int	IN_VM
private static int	IN_VM_TRANS
private static AddressField	lastJavaPCField
private static AddressField	lastJavaSPField
private static long	lockStackBaseOffset
private static long	lockStackTopOffset
private static CIntegerField	monitorOwnerIDField
private static int	NEW
private static int	NEW_TRANS
private static int	NOT_TERMINATED
private static long	oopPtrSize
private static AddressField	osThreadField Hides sun.jvm.hotspot.runtime.Thread.osThreadField.
private static AddressField	stackBaseField
private static CIntegerField	stackSizeField
private static CIntegerField	terminatedField
private static long	threadObjFieldOffset
private static CIntegerField	threadStateField
private static int	UNINITIALIZED

Constructor Summary

Access	Constructor and Description
public	JavaThread(Address addr)

Method Summary

Modifier and Type	Method and Description
public JNIHandleBlock	activeHandles()
private Frame	cookLastFrame(Frame fr)
public static AddressField	getAnchorField()
public Address	getBaseOfStackPointer() A stack pointer older than any java frame stack pointer.
public ContinuationEntry	getContEntry()
public Frame	getCurrentFrameGuess() This is only designed to be used by the debugging system.
public Oop	getCurrentParkBlocker()
public Frame	getLastFrame() Accessing frames
protected Frame	getLastFramePD() Internal routine implemented by platform-dependent subclasses
public Address	getLastJavaFP() Abstract accessor to last Java frame pointer, implemented by OS/CPU-specific JavaThread implementation.
public Address	getLastJavaPC()
public Address	getLastJavaSP() Get the last Java stack pointer
public JavaVFrame	getLastJavaVFrame(RegisterMap regMap) Accessing frames.
public JavaVFrame	getLastJavaVFrameDbg() This should only be used by a debugger.
public Address	getMonitorOwnerID()
public OSThread	getOSThread()
public Address	getStackBase()
public long	getStackBaseValue()
public long	getStackSize()
public int	getTerminated()
public String	getThreadName() Get the Java-side name of this thread
public Oop	getThreadObj() Gets the Java-side thread object for this JavaThread
public ThreadProxy	getThreadProxy()
public JavaThreadState	getThreadState()
public boolean	hasLastJavaFrame() Tells whether the last Java frame is set
private static synchronized void	initialize(TypeDataBase db) Hides sun.jvm.hotspot.runtime.Thread.initialize.
public boolean	isExiting()
public boolean	isInStack(Address a) Overrides sun.jvm.hotspot.runtime.Thread.isInStack.
public boolean	isLockOwned(OopHandle obj)
public boolean	isLockOwned(Address a) Overrides sun.jvm.hotspot.runtime.Thread.isLockOwned.
public boolean	isTerminated()
public Address	lastSPDbg()
public RegisterMap	newRegisterMap(boolean updateMap) In this system, a JavaThread is the top-level factory for a RegisterMap, since the JavaThread implementation is already platform-specific and RegisterMap is also necessarily platform-specific.
public void	oopsDo(AddressVisitor oopVisitor) Overrides sun.jvm.hotspot.runtime.Thread.oopsDo. Memory operations
public void	printInfoOn(PrintStream tty)
public void	printThreadContextOn(PrintStream out, boolean verbose)
public void	printThreadID()
public void	printThreadIDOn(PrintStream tty) Also only intended for use by the debugging system.
public void	printThreadInfoOn(PrintStream out)
pack-priv void	setThreadPDAccess(JavaThreadPDAccess access)

Inherited from sun.jvm.hotspot.runtime.Thread:: allocatedBytes getCurrentPendingMonitor getCurrentWaitingMonitor isHiddenFromExternalView isVMThread osThread suspendFlags threadObjectAddress tlab

Field Detail

access	back to summary
private static JavaThreadPDAccess access

activeHandlesField	back to summary
private static AddressField activeHandlesField

ADDRESS_FORMAT	back to summary
private static final String ADDRESS_FORMAT

anchorField	back to summary
private static AddressField anchorField

BLOCKED	back to summary
private static int BLOCKED

BLOCKED_TRANS	back to summary
private static int BLOCKED_TRANS

contEntryField	back to summary
private static AddressField contEntryField

DEBUG	back to summary
private static final boolean DEBUG

EXITING	back to summary
private static int EXITING

IN_JAVA	back to summary
private static int IN_JAVA

IN_JAVA_TRANS	back to summary
private static int IN_JAVA_TRANS

IN_NATIVE	back to summary
private static int IN_NATIVE

IN_NATIVE_TRANS	back to summary
private static int IN_NATIVE_TRANS

IN_VM	back to summary
private static int IN_VM

IN_VM_TRANS	back to summary
private static int IN_VM_TRANS

lastJavaPCField	back to summary
private static AddressField lastJavaPCField

lastJavaSPField	back to summary
private static AddressField lastJavaSPField

lockStackBaseOffset	back to summary
private static long lockStackBaseOffset

lockStackTopOffset	back to summary
private static long lockStackTopOffset

monitorOwnerIDField	back to summary
private static CIntegerField monitorOwnerIDField

NEW	back to summary
private static int NEW

NEW_TRANS	back to summary
private static int NEW_TRANS

NOT_TERMINATED	back to summary
private static int NOT_TERMINATED

oopPtrSize	back to summary
private static long oopPtrSize

osThreadField	back to summary
private static AddressField osThreadField Hides sun.jvm.hotspot.runtime.Thread.osThreadField.

stackBaseField	back to summary
private static AddressField stackBaseField

stackSizeField	back to summary
private static CIntegerField stackSizeField

terminatedField	back to summary
private static CIntegerField terminatedField

threadObjFieldOffset	back to summary
private static long threadObjFieldOffset

threadStateField	back to summary
private static CIntegerField threadStateField

UNINITIALIZED	back to summary
private static int UNINITIALIZED

Constructor Detail

JavaThread	back to summary
public JavaThread(Address addr)

Method Detail

activeHandles	back to summary
public JNIHandleBlock activeHandles()

cookLastFrame	back to summary
private Frame cookLastFrame(Frame fr)

getAnchorField	back to summary
public static AddressField getAnchorField()

getBaseOfStackPointer	back to summary
public Address getBaseOfStackPointer() A stack pointer older than any java frame stack pointer. Only needed on some platforms; for example, see thread_solaris_sparc.hpp.

getContEntry	back to summary
public ContinuationEntry getContEntry()

getCurrentFrameGuess	back to summary
public Frame getCurrentFrameGuess() This is only designed to be used by the debugging system. Returns a "best guess" of the topmost frame on the stack. This guess should be as "raw" as possible. For example, if the topmost frame is an interpreter frame (the return PC is in the interpreter) but is not a valid frame (i.e., the BCI has not yet been set up) this should still return the topmost frame and not the sender. Validity checks are done at higher levels.

getCurrentFrameGuess

back to summary

public Frame getCurrentFrameGuess()

This is only designed to be used by the debugging system. Returns a "best guess" of the topmost frame on the stack. This guess should be as "raw" as possible. For example, if the topmost frame is an interpreter frame (the return PC is in the interpreter) but is not a valid frame (i.e., the BCI has not yet been set up) this should still return the topmost frame and not the sender. Validity checks are done at higher levels.

getCurrentParkBlocker	back to summary
public Oop getCurrentParkBlocker()

getLastFrame	back to summary
public Frame getLastFrame() Accessing frames

getLastFramePD	back to summary
protected Frame getLastFramePD() Internal routine implemented by platform-dependent subclasses

getLastJavaFP	back to summary
public Address getLastJavaFP() Abstract accessor to last Java frame pointer, implemented by OS/CPU-specific JavaThread implementation. May return null if there is no frame pointer or if it is not necessary on this platform.

getLastJavaPC	back to summary
public Address getLastJavaPC()

getLastJavaSP	back to summary
public Address getLastJavaSP() Get the last Java stack pointer

getLastJavaVFrame	back to summary
public JavaVFrame getLastJavaVFrame(RegisterMap regMap) Accessing frames. Returns the last Java VFrame or null if none was present. (NOTE that this is mostly unusable in a debugging system; see getLastJavaVFrameDbg, below, which provides very different functionality.)

getLastJavaVFrameDbg	back to summary
public JavaVFrame getLastJavaVFrameDbg() This should only be used by a debugger. Uses the current frame guess to attempt to get the topmost JavaVFrame. (getLastJavaVFrame, as a port of the VM's routine, assumes the VM is at a safepoint.)

getMonitorOwnerID	back to summary
public Address getMonitorOwnerID()

getOSThread	back to summary
public OSThread getOSThread()

getStackBase	back to summary
public Address getStackBase()

getStackBaseValue	back to summary
public long getStackBaseValue()

getStackSize	back to summary
public long getStackSize()

getTerminated	back to summary
public int getTerminated()

getThreadName	back to summary
public String getThreadName() Get the Java-side name of this thread

getThreadObj	back to summary
public Oop getThreadObj() Gets the Java-side thread object for this JavaThread

getThreadProxy	back to summary
public ThreadProxy getThreadProxy()

getThreadState	back to summary
public JavaThreadState getThreadState()

hasLastJavaFrame	back to summary
public boolean hasLastJavaFrame() Tells whether the last Java frame is set

initialize	back to summary
private static synchronized void initialize(TypeDataBase db) Hides sun.jvm.hotspot.runtime.Thread.initialize.

isExiting	back to summary
public boolean isExiting()

isInStack	back to summary
public boolean isInStack(Address a) Overrides sun.jvm.hotspot.runtime.Thread.isInStack.

isLockOwned	back to summary
public boolean isLockOwned(OopHandle obj)

isLockOwned	back to summary
public boolean isLockOwned(Address a) Overrides sun.jvm.hotspot.runtime.Thread.isLockOwned.

isTerminated	back to summary
public boolean isTerminated()

lastSPDbg	back to summary
public Address lastSPDbg()

newRegisterMap	back to summary
public RegisterMap newRegisterMap(boolean updateMap) In this system, a JavaThread is the top-level factory for a RegisterMap, since the JavaThread implementation is already platform-specific and RegisterMap is also necessarily platform-specific. The updateMap argument indicates whether the register map needs to be updated, for example during stack traversal -- see frame.hpp.

oopsDo

back to summary

public void oopsDo(AddressVisitor oopVisitor)

Overrides sun.jvm.hotspot.runtime.Thread.oopsDo.

Doc from sun.jvm.hotspot.runtime.Thread.oopsDo.

Memory operations

printInfoOn	back to summary
public void printInfoOn(PrintStream tty)

printThreadContextOn	back to summary
public void printThreadContextOn(PrintStream out, boolean verbose)

printThreadID	back to summary
public void printThreadID()

printThreadIDOn	back to summary
public void printThreadIDOn(PrintStream tty) Also only intended for use by the debugging system. Provides the same effect of OSThread::print(); that is, prints a value which allows the user to intuitively understand which native OS thread maps to this Java thread. Does not print a newline or leading or trailing spaces.

printThreadInfoOn	back to summary
public void printThreadInfoOn(PrintStream out)