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https://issues.apache.org/jira/browse/LUCENE-9109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17003268#comment-17003268
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Uwe Schindler edited comment on LUCENE-9109 at 12/25/19 2:09 PM:
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I backported the removal of AccessController to 8.x.
I wanted to refactor the code and use the same stream logic like with
StackWalker, but this was impossible as Java 8 does not support
{{Stream#dropWhile()}} and {{Predicate#not()}}. So I left the main logic as is
in 8.x.
was (Author: thetaphi):
I backported the removal of SecurityManager to 8.x.
I wanted to refactor the code and use the same stream logic like with
StackWalker, but this was impossible as Java 8 does not support
{{Stream#dropWhile()}} and {{Predicate#not()}}. So I left the main logic as is
in 8.x.
> Use Java 9+ StackWalker to implement TestSecurityManager's detection of JVM
> exit
> --------------------------------------------------------------------------------
>
> Key: LUCENE-9109
> URL: https://issues.apache.org/jira/browse/LUCENE-9109
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/test-framework
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Priority: Major
> Fix For: master (9.0)
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> This is just a small improvement in Lucene/Solr master (Java 11) to detect
> exit of JVM in our test framework. There are other places in Lucene that use
> ineffective ways to inspect the stack trace.
> This one optimizes the implementation of
> TestSecurityManager#checkExit(status) to disallow all JVM exits outside of
> the official test runner by using StackWalker. In addition this needs no
> additional permissions, because we do not instruct StackWalker to fetch all
> crazy stuff like Class instances of stack elements.
> The way how this works is: Walk through stack trace:
> - skip all internal frames (those which come before the actual exit call)
> - skip all frmes with the actual exit call
> - limit to one more frame (the method calling System.exit())
> - check if that remaining frame is on our whitelist
> This can only be commited to master (9.0), as it requires Java 9.
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