RFR: 8338411: Implement JEP 486: Permanently Disable the Security Manager [v8]

[Sean Mullan]

On Tue, 5 Nov 2024 18:58:22 GMT, Sean Mullan <mullan at openjdk.org> wrote:

>> This is the implementation of JEP 486: Permanently Disable the Security Manager. See [JEP 486](https://openjdk.org/jeps/486) for more details. The [CSR](https://bugs.openjdk.org/browse/JDK-8338412) describes in detail the main changes in the JEP and also includes an apidiff of the specification changes.
>> 
>> NOTE: the majority (~95%) of the changes in this PR are test updates (removal/modifications) and API specification changes, the latter mostly to remove `@throws SecurityException`. The remaining changes are primarily the removal of the `SecurityManager`, `Policy`, `AccessController` and other Security Manager API implementations. There is very little new code.
>> 
>> The code changes can be broken down into roughly the following categories:
>> 
>> 1. Degrading the behavior of Security Manager APIs to either throw Exceptions by default or provide an execution environment that disallows access to all resources by default.
>> 2. Changing hundreds of methods and constructors to no longer throw a `SecurityException` if a Security Manager was enabled. They will operate as they did in JDK 23 with no Security Manager enabled.
>> 3. Changing the `java` command to exit with a fatal error if a Security Manager is enabled.
>> 4. Removing the hotspot native code for the privileged stack walk and the inherited access control context. The remaining hotspot code and tests related to the Security Manager will be removed immediately after integration - see [JDK-8341916](https://bugs.openjdk.org/browse/JDK-8341916).
>> 5. Removing or modifying hundreds of tests. Many tests that tested Security Manager behavior are no longer relevant and thus have been removed or modified.
>> 
>> There are a handful of Security Manager related tests that are failing and are at the end of the `test/jdk/ProblemList.txt`, `test/langtools/ProblemList.txt` and `test/hotspot/jtreg/ProblemList.txt` files - these will be removed or separate bugs will be filed before integrating this PR. 
>> 
>> Inside the JDK, we have retained calls to `SecurityManager::getSecurityManager` and `AccessController::doPrivileged` for now, as these methods have been degraded to behave the same as they did in JDK 23 with no Security Manager enabled. After we integrate this JEP, those calls will be removed in each area (client-libs, core-libs, security, etc).
>> 
>> I don't expect each reviewer to review all the code changes in this JEP. Rather, I advise that you only focus on the changes for the area (client-libs, core-libs, net, ...
>
> Sean Mullan has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 217 commits:
> 
>  - Merge remote-tracking branch 'jdk-sandbox/jep486' into JDK-8338411
>  - Merge branch 'master' into jep486
>  - Merge branch 'master' into jep486
>  - Merge branch 'master' into jep486
>  - Merge remote-tracking branch 'jdk-sandbox/jep486' into JDK-8338411
>  - Remove "access" and "policy" options from debug help.
>  - Merge branch 'master' into jep486
>  - Merge branch 'jep486' of https://github.com/openjdk/jdk-sandbox into jep486
>  - remove MainClassCantBeLoadedTest from problemlisting
>  - remove LauncherErrors test from problemlisting
>  - ... and 207 more: https://git.openjdk.org/jdk/compare/3fab8e37...e9e7f0c9

The latest update includes:
- merging with the mainline sources
- a couple of test removals from the ProblemList for tests that no longer apply
- removal of the "policy" and "access" options from the `-Djava.security.debug` help option.
- a small update to remove some SM specific text from the `System.LoggerFinder` class description.
- copyright header updates for several tests that were previously modified
- addition of a few client manual tests to the ProblemList that have dependencies on the Security Manager and will be resolved later

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PR Comment: https://git.openjdk.org/jdk/pull/21498#issuecomment-2458058335