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List: openjdk-serviceability-dev
Subject: Re: 8218727: vmTestbase/nsk/jvmti/scenarios/events/EM04/em04t001/TestDescription.java
From: Daniil Titov <daniil.x.titov () oracle ! com>
Date: 2019-03-27 19:42:19
Message-ID: 36D019B1-0876-4E25-BC33-CD0654AF0616 () oracle ! com
[Download RAW message or body]
Thank you, Serguei and Gary, for reviewing this change!
--Daniil
On 3/27/19, 5:20 AM, "Gary Adams" <gary.adams@oracle.com> wrote:
Looks OK to me.
On 3/27/19, 3:59 AM, serguei.spitsyn@oracle.com wrote:
> Hi Daniil,
>
> The fix looks good.
>
> Thanks,
> Serguei
>
>
> On 3/26/19 20:32, Daniil Titov wrote:
>> Please review the change that fixes the test when running with Graal on.
>>
>> The problem here is the lack of synchronization when accessing the
>> internal data structure (the list of events) in the agent procedure
>> and in the callbacks the test enables. That results in the agent proc
>> starts removing elements from the list of the events while the
>> callback handlers are still enabled, assuming that no new events
>> could be generated, but in case of Graal it is not true. This causes
>> to the crash when the callback iterates over the list of events and
>> tries to access the element that was just removed by the agent
>> procedure.
>>
>> Webrev: http://cr.openjdk.java.net/~dtitov/8218727/webrev.01/
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8218727
>>
>> Thanks!
>>
>> --Daniil
>>
>>
>>
>
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