RFR: 8366659: ObjectMonitor::wait() can deadlock with a suspension request [v4]

[Anton Artemov]

On Tue, 11 Nov 2025 02:33:25 GMT, Daniel D. Daugherty <dcubed at openjdk.org> wrote:

>> Anton Artemov has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 18 commits:
>> 
>>  - Merge remote-tracking branch 'origin/master' into JDK-8366659-OM-wait-suspend-deadlock
>>  - 8366659: Added a comment to a boolean arg for enter()
>>  - Merge remote-tracking branch 'origin/master' into JDK-8366659-OM-wait-suspend-deadlock
>>  - Merge remote-tracking branch 'origin/master' into JDK-8366659-OM-wait-suspend-deadlock
>>  - 8366659: Fixed new lines.
>>  - Merge remote-tracking branch 'origin/master' into JDK-8366659-OM-wait-suspend-deadlock
>>  - 8366659: Removed incorrect assert,
>>  - 8366659: Fixed merge conflict
>>  - 8366659: Fixed whitespace.
>>  - 8366659: Disabled posting JVMTI events in reenter-etner path of wait. Postponed waited event.
>>  - ... and 8 more: https://git.openjdk.org/jdk/compare/79fee607...31482ba4
>
> test/hotspot/jtreg/serviceability/jvmti/SuspendWithObjectMonitorWait/SuspendWithObjectMonitorWait.java line 452:
> 
>> 450: 
>> 451:             try { Thread.sleep(1000);
>> 452:             } catch(Exception e) {}
> 
> Nit: The Thread.sleep call should be on its own line after L451.

Addressed in the latest commit.

> test/hotspot/jtreg/serviceability/jvmti/SuspendWithObjectMonitorWait/SuspendWithObjectMonitorWait.java line 506:
> 
>> 504:                 }
>> 505:                 try { Thread.sleep(1000);
>> 506:                 } catch(Exception e) {}
> 
> Nit: The Thread.sleep call should be on its own line after L505.

Addressed in the latest commit.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/27040#discussion_r2514175972
PR Review Comment: https://git.openjdk.org/jdk/pull/27040#discussion_r2514176496