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8286666: JEP 429: Implementation of Scoped Values (Incubator)

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Reviewed-by: psandoz, dlong, alanb, mcimadamore
This commit is contained in:
Andrew Haley 2022-12-07 10:14:06 +00:00 • committed by Alan Bateman
parent ccc69af966
commit 221e1a4260
61 changed files with 2889 additions and 230 deletions
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19
src/java.base/share/classes/java/lang/VirtualThread.java
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@ -24,6 +24,7 @@
*/
package java.lang;
import java.lang.ref.Reference;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Locale;
@ -53,6 +54,8 @@ import jdk.internal.vm.StackableScope;
import jdk.internal.vm.ThreadContainer;
import jdk.internal.vm.ThreadContainers;
import jdk.internal.vm.annotation.ChangesCurrentThread;
import jdk.internal.vm.annotation.ForceInline;
import jdk.internal.vm.annotation.Hidden;
import jdk.internal.vm.annotation.JvmtiMountTransition;
import sun.nio.ch.Interruptible;
import sun.security.action.GetPropertyAction;
@ -283,13 +286,13 @@ final class VirtualThread extends BaseVirtualThread {
event.commit();
}
Object bindings = scopedValueBindings();
try {
task.run();
runWith(bindings, task);
} catch (Throwable exc) {
dispatchUncaughtException(exc);
} finally {
try {
// pop any remaining scopes from the stack, this may block
StackableScope.popAll();
@ -311,6 +314,14 @@ final class VirtualThread extends BaseVirtualThread {
}
}
@Hidden
@ForceInline
private void runWith(Object bindings, Runnable op) {
ensureMaterializedForStackWalk(bindings);
op.run();
Reference.reachabilityFence(bindings);
}
/**
* Mounts this virtual thread onto the current platform thread. On
* return, the current thread is the virtual thread.
@ -488,8 +499,8 @@ final class VirtualThread extends BaseVirtualThread {
boolean started = false;
container.onStart(this); // may throw
try {
// extent locals may be inherited
inheritExtentLocalBindings(container);
// scoped values may be inherited
inheritScopedValueBindings(container);
// submit task to run thread
submitRunContinuation();