com.oracle.svm.core.thread

Class Safepoint.Master

java.lang.Object

com.oracle.svm.core.thread.Safepoint.Master

Enclosing class:

Safepoint

public static final class Safepoint.Master
extends Object

Methods for the thread that brings the system to a safepoint.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Safepoint.Master.TestingBackdoor A sample method to execute in a VMOperation.

Method Summary

Modifier and Type	Method and Description
protected boolean	freeze(String reason) Have each of the threads (except myself!) stop at a safepoint.
protected org.graalvm.nativeimage.IsolateThread	getRequestingThread()
protected org.graalvm.word.UnsignedWord	getSafepointId()
protected boolean	isFrozen()
static Safepoint.Master	singleton()
protected void	thaw(String reason, boolean unlock) Let all of the threads proceed from their safepoint.

Methods inherited from class java.lang.Object

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

Method Detail

singleton

public static Safepoint.Master singleton()

freeze

protected boolean freeze(String reason)

Have each of the threads (except myself!) stop at a safepoint. Locking VMThreads.THREAD_MUTEX in this method is fine because the method is only executed by the VM operation thread. Therefore, no other thread can initiate a safepoint and Java allocations are disabled as well.

thaw

protected void thaw(String reason,
                    boolean unlock)

Let all of the threads proceed from their safepoint.

getRequestingThread

protected org.graalvm.nativeimage.IsolateThread getRequestingThread()

isFrozen

protected boolean isFrozen()

getSafepointId

protected org.graalvm.word.UnsignedWord getSafepointId()