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8337199: Add jcmd Thread.vthread_scheduler and Thread.vthread_pollers diagnostic commands

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Reviewed-by: dholmes, kevinw
This commit is contained in:
Alan Bateman 2024-12-03 07:24:46 +00:00
parent 3eb5461578
commit 5c8cb2edcb
11 changed files with 383 additions and 12 deletions
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5
src/java.base/share/classes/java/lang/System.java
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@ -55,6 +55,7 @@ import java.util.Properties;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.concurrent.Executor;
import java.util.concurrent.ScheduledExecutorService;
import java.util.function.Supplier;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Stream;
@ -2304,6 +2305,10 @@ public final class System {
return VirtualThread.defaultScheduler();
}
public Stream<ScheduledExecutorService> virtualThreadDelayedTaskSchedulers() {
return VirtualThread.delayedTaskSchedulers();
}
public StackWalker newStackWalkerInstance(Set<StackWalker.Option> options,
ContinuationScope contScope,
Continuation continuation) {

10
src/java.base/share/classes/java/lang/VirtualThread.java
View file

@ -24,6 +24,7 @@
*/
package java.lang;
import java.util.Arrays;
import java.util.Locale;
import java.util.Objects;
import java.util.concurrent.CountDownLatch;
@ -32,12 +33,12 @@ import java.util.concurrent.Executors;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.ForkJoinPool.ForkJoinWorkerThreadFactory;
import java.util.concurrent.ForkJoinTask;
import java.util.concurrent.ForkJoinWorkerThread;
import java.util.concurrent.Future;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.stream.Stream;
import jdk.internal.event.VirtualThreadEndEvent;
import jdk.internal.event.VirtualThreadStartEvent;
import jdk.internal.event.VirtualThreadSubmitFailedEvent;
@ -192,6 +193,13 @@ final class VirtualThread extends BaseVirtualThread {
return DEFAULT_SCHEDULER;
}
/**
* Returns a stream of the delayed task schedulers used to support timed operations.
*/
static Stream<ScheduledExecutorService> delayedTaskSchedulers() {
return Arrays.stream(DELAYED_TASK_SCHEDULERS);
}
/**
* Returns the continuation scope used for virtual threads.
*/