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8284161: Implementation of Virtual Threads (Preview)

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Co-authored-by: Ron Pressler <rpressler@openjdk.org>
Co-authored-by: Alan Bateman <alanb@openjdk.org>
Co-authored-by: Erik Österlund <eosterlund@openjdk.org>
Co-authored-by: Andrew Haley <aph@openjdk.org>
Co-authored-by: Rickard Bäckman <rbackman@openjdk.org>
Co-authored-by: Markus Grönlund <mgronlun@openjdk.org>
Co-authored-by: Leonid Mesnik <lmesnik@openjdk.org>
Co-authored-by: Serguei Spitsyn <sspitsyn@openjdk.org>
Co-authored-by: Chris Plummer <cjplummer@openjdk.org>
Co-authored-by: Coleen Phillimore <coleenp@openjdk.org>
Co-authored-by: Robbin Ehn <rehn@openjdk.org>
Co-authored-by: Stefan Karlsson <stefank@openjdk.org>
Co-authored-by: Thomas Schatzl <tschatzl@openjdk.org>
Co-authored-by: Sergey Kuksenko <skuksenko@openjdk.org>
Reviewed-by: lancea, eosterlund, rehn, sspitsyn, stefank, tschatzl, dfuchs, lmesnik, dcubed, kevinw, amenkov, dlong, mchung, psandoz, bpb, coleenp, smarks, egahlin, mseledtsov, coffeys, darcy
This commit is contained in:
Alan Bateman 2022-05-07 08:06:16 +00:00
parent 5212535a27
commit 9583e3657e
1133 changed files with 95935 additions and 8335 deletions
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69
src/java.base/share/classes/java/lang/LiveStackFrame.java
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2015, 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2015, 2022, 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
@ -27,6 +27,8 @@ package java.lang;
import java.lang.StackWalker.StackFrame;
import java.util.EnumSet;
import java.util.Set;
import jdk.internal.vm.Continuation;
import jdk.internal.vm.ContinuationScope;
import static java.lang.StackWalker.ExtendedOption.LOCALS_AND_OPERANDS;
@ -177,11 +179,74 @@ interface LiveStackFrame extends StackFrame {
* and it denies access to {@code RuntimePermission("getStackWalkerWithClassReference")}.
*/
public static StackWalker getStackWalker(Set<StackWalker.Option> options) {
return getStackWalker(options, null);
}
/**
* Gets a {@code StackWalker} instance with the given options specifying
* the stack frame information it can access, and which will traverse at most
* the given {@code maxDepth} number of stack frames. If no option is
* specified, this {@code StackWalker} obtains the method name and
* the class name with all
* {@linkplain StackWalker.Option#SHOW_HIDDEN_FRAMES hidden frames} skipped.
* The returned {@code StackWalker} can get locals and operands.
*
* @param options stack walk {@link StackWalker.Option options}
* @param contScope the continuation scope up to which (inclusive) to walk the stack
*
* @throws SecurityException if the security manager is present and
* it denies access to {@code RuntimePermission("liveStackFrames")}; or
* or if the given {@code options} contains
* {@link StackWalker.Option#RETAIN_CLASS_REFERENCE Option.RETAIN_CLASS_REFERENCE}
* and it denies access to {@code RuntimePermission("getStackWalkerWithClassReference")}.
*/
public static StackWalker getStackWalker(Set<StackWalker.Option> options, ContinuationScope contScope) {
@SuppressWarnings("removal")
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new RuntimePermission("liveStackFrames"));
}
return StackWalker.newInstance(options, LOCALS_AND_OPERANDS);
return StackWalker.newInstance(options, LOCALS_AND_OPERANDS, contScope);
}
/**
* Gets {@code StackWalker} of the given unmounted continuation, that can get locals and operands.
*
* @param continuation the continuation to walk
*
* @throws SecurityException if the security manager is present and
* denies access to {@code RuntimePermission("liveStackFrames")}
*/
public static StackWalker getStackWalker(Continuation continuation) {
return getStackWalker(EnumSet.noneOf(StackWalker.Option.class), continuation.getScope(), continuation);
}
/**
* Gets a {@code StackWalker} instance with the given options specifying
* the stack frame information it can access, and which will traverse at most
* the given {@code maxDepth} number of stack frames. If no option is
* specified, this {@code StackWalker} obtains the method name and
* the class name with all
* {@linkplain StackWalker.Option#SHOW_HIDDEN_FRAMES hidden frames} skipped.
* The returned {@code StackWalker} can get locals and operands.
*
* @param options stack walk {@link StackWalker.Option options}
* @param continuation the continuation to walk
*
* @throws SecurityException if the security manager is present and
* it denies access to {@code RuntimePermission("liveStackFrames")}; or
* or if the given {@code options} contains
* {@link StackWalker.Option#RETAIN_CLASS_REFERENCE Option.RETAIN_CLASS_REFERENCE}
* and it denies access to {@code RuntimePermission("getStackWalkerWithClassReference")}.
*/
public static StackWalker getStackWalker(Set<StackWalker.Option> options,
ContinuationScope contScope,
Continuation continuation) {
@SuppressWarnings("removal")
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(new RuntimePermission("liveStackFrames"));
}
return StackWalker.newInstance(options, LOCALS_AND_OPERANDS, contScope, continuation);
}
}