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8322829: Refactor nioBlocker to avoid blocking while holding Thread's interrupt lock

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Reviewed-by: jpai
This commit is contained in:
Alan Bateman 2024-01-09 07:05:27 +00:00
parent 07fce8eff2
commit 7286f5291d
6 changed files with 118 additions and 54 deletions
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27
src/java.base/share/classes/java/lang/VirtualThread.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2018, 2024, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -852,18 +852,32 @@ final class VirtualThread extends BaseVirtualThread {
return true;
}
@Override
void blockedOn(Interruptible b) {
notifyJvmtiDisableSuspend(true);
try {
super.blockedOn(b);
} finally {
notifyJvmtiDisableSuspend(false);
}
}
@Override
@SuppressWarnings("removal")
public void interrupt() {
if (Thread.currentThread() != this) {
checkAccess();
// if current thread is a virtual thread then prevent it from being
// suspended when entering or holding interruptLock
Interruptible blocker;
notifyJvmtiDisableSuspend(true);
try {
synchronized (interruptLock) {
interrupted = true;
Interruptible b = nioBlocker;
if (b != null) {
b.interrupt(this);
blocker = nioBlocker();
if (blocker != null) {
blocker.interrupt(this);
}
// interrupt carrier thread if mounted
@ -873,6 +887,11 @@ final class VirtualThread extends BaseVirtualThread {
} finally {
notifyJvmtiDisableSuspend(false);
}
// notify blocker after releasing interruptLock
if (blocker != null) {
blocker.postInterrupt();
}
} else {
interrupted = true;
carrierThread.setInterrupt();