Withdrawn: 8254877: GCLogPrecious::_lock rank constrains what locks you are allowed to have when crashing

Wed Oct 28 13:30:51 UTC 2020

On Wed, 28 Oct 2020 11:38:10 GMT, Erik Österlund <eosterlund at openjdk.org> wrote:

> Today, when you crash, the GCLogPrecious::_lock is taken. This effectively limits you to only get clean crash reports if you crash or assert without holding a lock of rank tty or lower. It is arguably difficult to know what locks you are going to have when crashing. Therefore, I don't think the precious GC log should constrain possible crashing contexts in that fashion.
> 
> This patch inserts the precious GC lines into a linked list instead, that can be traversed concurrently, without holding any locks. This allows you to crash in contexts where "low" ranked locks are held.
> 
> I have manually verified that the hs_err precious GC log looks identical before and after my change.

This pull request has been closed without being integrated.

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PR: https://git.openjdk.java.net/jdk/pull/900