8297276: Remove thread text from Subject.current #11292

wangweij · 2022-11-22T16:26:30Z

With the introduction of Virtual Threads, the current subject is no longer guaranteed to be inherited in a new thread. Remove this requirement until we find another way to implement Subject::current.

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Issues

JDK-8297276: Remove thread text from Subject.current
JDK-8297351: Remove thread text from Subject.current (CSR)

Reviewers

Xue-Lei Andrew Fan (@XueleiFan - Reviewer)
Roger Riggs (@RogerRiggs - Reviewer)
Sean Mullan (@seanjmullan - Reviewer)

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$ git fetch https://git.openjdk.org/jdk pull/11292/head:pull/11292
$ git checkout pull/11292

Update a local copy of the PR:
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$ git pull https://git.openjdk.org/jdk pull/11292/head

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$ git pr checkout 11292

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bridgekeeper · 2022-11-22T16:27:22Z

👋 Welcome back weijun! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

openjdk · 2022-11-22T16:30:05Z

@wangweij The following label will be automatically applied to this pull request:

security

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mlbridge · 2022-11-22T16:33:15Z

Webrevs

00: Full (48ef69aa)

XueleiFan · 2022-11-22T17:05:52Z

src/java.base/share/classes/javax/security/auth/Subject.java

@@ -325,10 +325,6 @@ public Subject run() {
     * retrieved by this method. After {@code action} is finished, the current
     * subject is reset to its previous value. The current
     * subject is {@code null} before the first call of {@code callAs()}.
-     * <p>
-     * When a new thread is created, its current subject is the same as


what about change from"when" to "if", in case some implementation still create a new thread?

This is not about the implementation of this method, which might or might not allow the current subject to be inherited in a new thread. The spec change is telling the users of this method that such inheritance is no longer guaranteed. We are still not sure if the future implementation of this method can guarantee that, but given it's already broken now, we'd better remove this requirement. We can add if later if we can do that.

Hm, it may still apply if the current subject to be inherited in a new thread. I fine to remove this section. A release note and known issue may be filed to notify the behavior change and issue.

RogerRiggs

LGTM, dropping the inaccurate text. A release note is a good idea.

AlanBateman · 2022-11-23T12:35:17Z

Just re-reading the javadoc for Subject.callAs. It doesn't say anything about inheritance so there shouldn't be any expectation that Subject is inherited, so I think the change proposed here is okay. For another PR but I think the callAs javadoc could say a bit more about the Subject being set for the bounded execution of the given task. When the task completes, the current Subject is null or reverts to its previous value in the current thread.

wangweij · 2022-11-23T14:13:32Z

@AlanBateman You are right. The callAs method is very short and only mentions "the current subject". My original idea is to describe everything about what "the current subject" means inside the current() method, which now talks about how it's set and reset. Do you think it's clearer to duplicate some of these words in callAs as well? Both the two methods currently have a @see pointing to the other.

openjdk · 2022-11-28T21:58:09Z

@wangweij This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8297276: Remove thread text from Subject.current

Reviewed-by: xuelei, rriggs, mullan

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 72 new commits pushed to the master branch:

cdf9ed0: 8297528: java/io/File/TempDirDoesNotExist.java test failing on windows-x64
105d9d7: 8295351: java/lang/Float/Binary16Conversion.java fails with "Unexpected result of converting"
a80552e: 8236919: Refactor com.sun.tools.javac.main.CommandLine into a reusable module for other JDK tools
a249a52: 8296754: AutoCreateSharedArchive in JDK 20 is not compatible with JDK 19
405b188: 8297570: jdk/jfr/threading/TestDeepVirtualStackTrace.java fails with -XX:-UseTLAB
ba0a252: 8297717: Remove jdk/internal/misc/TerminatingThreadLocal/TestTerminatingThreadLocal.java from ProblemList
c05dc80: 8297660: x86: Redundant test+jump in C1 allocateArray
eff4c03: 8297343: TestStress*.java fail with "got different traces for the same seed"
6a856bc: 8297499: Parallel: Missing iteration over klass when marking objArrays/objArrayOops during Full GC
b80f5af: 8297309: Memory leak in ShenandoahFullGC
... and 62 more: https://git.openjdk.org/jdk/compare/0ac5b55311222d0531c9cfcec8c74932661b1750...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

➡️ To integrate this PR with the above commit message to the master branch, type /integrate in a new comment.

wangweij · 2022-11-28T21:59:33Z

/integrate

openjdk · 2022-11-28T22:03:13Z

Going to push as commit d450314.
Since your change was applied there have been 72 commits pushed to the master branch:

cdf9ed0: 8297528: java/io/File/TempDirDoesNotExist.java test failing on windows-x64
105d9d7: 8295351: java/lang/Float/Binary16Conversion.java fails with "Unexpected result of converting"
a80552e: 8236919: Refactor com.sun.tools.javac.main.CommandLine into a reusable module for other JDK tools
a249a52: 8296754: AutoCreateSharedArchive in JDK 20 is not compatible with JDK 19
405b188: 8297570: jdk/jfr/threading/TestDeepVirtualStackTrace.java fails with -XX:-UseTLAB
ba0a252: 8297717: Remove jdk/internal/misc/TerminatingThreadLocal/TestTerminatingThreadLocal.java from ProblemList
c05dc80: 8297660: x86: Redundant test+jump in C1 allocateArray
eff4c03: 8297343: TestStress*.java fail with "got different traces for the same seed"
6a856bc: 8297499: Parallel: Missing iteration over klass when marking objArrays/objArrayOops during Full GC
b80f5af: 8297309: Memory leak in ShenandoahFullGC
... and 62 more: https://git.openjdk.org/jdk/compare/0ac5b55311222d0531c9cfcec8c74932661b1750...master

Your commit was automatically rebased without conflicts.

openjdk · 2022-11-28T22:03:37Z

@wangweij Pushed as commit d450314.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.

the change

48ef69a

openjdk bot added the rfr Pull request is ready for review label Nov 22, 2022

openjdk bot added the security security-dev@openjdk.org label Nov 22, 2022

openjdk bot added the csr Pull request needs approved CSR before integration label Nov 22, 2022

XueleiFan reviewed Nov 22, 2022

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XueleiFan approved these changes Nov 22, 2022

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RogerRiggs approved these changes Nov 22, 2022

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seanjmullan approved these changes Nov 22, 2022

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openjdk bot removed the csr Pull request needs approved CSR before integration label Nov 28, 2022

openjdk bot added the ready Pull request is ready to be integrated label Nov 28, 2022

openjdk bot added the integrated Pull request has been integrated label Nov 28, 2022

openjdk bot closed this Nov 28, 2022

openjdk bot removed ready Pull request is ready to be integrated rfr Pull request is ready for review labels Nov 28, 2022

wangweij deleted the 8297276 branch November 29, 2022 13:42

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8297276: Remove thread text from Subject.current #11292

8297276: Remove thread text from Subject.current #11292

wangweij commented Nov 22, 2022 •

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8297276: Remove thread text from Subject.current #11292

8297276: Remove thread text from Subject.current #11292

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wangweij commented Nov 22, 2022 • edited by openjdk bot Loading

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wangweij commented Nov 22, 2022 •

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