RFR: 8210233: Prepare Klass::is_loader_alive() for concurrent class unloading
erik.osterlund at oracle.com
Mon Sep 3 15:25:23 UTC 2018
You are right. Thank you for catching that.
Thank you for the review.
On 2018-08-30 21:27, Kim Barrett wrote:
>> On Aug 30, 2018, at 2:56 PM, Erik Österlund <erik.osterlund at oracle.com> wrote:
>> The Klass::is_loader_alive() facility currently assumes that CLDs are set to unloading before giving a correct answer. This is a problem for concurrent class unloading. This needs to instead be evaluated in a more concurrency friendly fashion, so that it will give the right answer even in concurrent contexts.
>> The proposed solution is to stop using the cached unloading value, and instead ask the CLD if it is_alive(), which utilizes a phantom load on the CLD holder, and is concurrency friendly.
> Nearby comments involving "unloading" should be updated.
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