RFR: 8187402: UnknownOopException is occurred on Stack Memory window in HSDB

[Jini George]

Hi Yasumasa,

I think you could create an extension of LingeredApp with the "-Xcomp" 
option or the "-XX:CompileCommand=compileonly,<method name>" option to 
ensure JIT-ing of a method and maybe turn off TieredCompilation using 
"-XX:-TieredCompilation" for ease, too. If that proves to be too 
cumbersome, the JShell test case can still be used as a fallback option.

I agree with the possibility of JShell implementation change in the 
future. But I might say it is better to have the test running till 
however long it can, rather than not having any testing done for that 
part at all.

Thank you,
Jini.

On 10/2/2017 5:03 AM, Yasumasa Suenaga wrote:
> Hi Jini,
> 
> Thank you for sharing the testcase.
> However I concern about this as below:
> 
> 1. This bug appears at JIT'ed frame. So it might not appear on test server.
> We can add -Xcomp or JSON for compiler control for this issue, but we 
> cannot control compile level (TieredCompilation) AFAIK.
> 
> 2. If JShell implementation is changed in the future, this testcase 
> might not verify this bug.
> 
> 
> I will merge your testcase to the webrev if these concerns can be ignored.
> 
> 
> Thanks,
> 
> Yasumasa
> 
> 
> 
> 2017/10/02 0:51 "Jini George" <jini.george at oracle.com 
> <mailto:jini.george at oracle.com>>:
> 
>     Apologize for the delay in responding to this, Yasumasa.
> 
>     I tried my hand at creating a test case for this by attaching an SA 
>     process to jshell and by invoking a method to traverse the frame
>     oopmaps  for the 'output reader' thread -- Please do take a look at:
> 
>     http://cr.openjdk.java.net/~jgeorge/sponsorships/8187402_ysuenaga/TestFrameOopMap.java
>     <http://cr.openjdk.java.net/~jgeorge/sponsorships/8187402_ysuenaga/TestFrameOopMap.java>
> 
>     I think, in general, for the issues manifested through the GUI, we
>     can  probably try having unit test cases directly invoking the
>     methods involved.
> 
>     Thanks,
>     Jini.
> 
>     On 9/27/2017 4:10 AM, Yasumasa Suenaga wrote:
> 
>         Hi Jini,
> 
>         IMHO this issue (JDK-8187402) and JDK-8187403 are too difficult
>         to crate test cases because they are problems in Stack Memory
>         window in HSDB.
>         Can we add noreg-hard label to JBS?
> 
> 
>         Thanks,
> 
>         Yasumasa
> 
> 
>         On 2017/09/27 2:36, Jini George wrote:
> 
>             Hi Yasumasa,
> 
>             The changes look fine, but please do include the test case
>             also for
>             this. In general, it would be great if you could provide
>             test cases also
>             along with the code changes while sending for review.
> 
>             Thank you,
>             Jini.
> 
>             On 9/26/2017 8:19 PM, Yasumasa Suenaga wrote:
> 
>                 Hi all,
> 
>                 I uploaded new webrev to be adapted to jdk10/hs:
> 
>                   ?
>                 http://cr.openjdk.java.net/~ysuenaga/JDK-8187402/webrev.01/
>                 <http://cr.openjdk.java.net/~ysuenaga/JDK-8187402/webrev.01/>
> 
> 
>                 Thanks,
> 
>                 Yasumasa
> 
> 
>                 On 2017/09/21 7:47, Yasumasa Suenaga wrote:
> 
>                     PING:
> 
>                     Have you checked this issue?
> 
>                         ??
>                         http://cr.openjdk.java.net/~ysuenaga/JDK-8187402/webrev.00/
>                         <http://cr.openjdk.java.net/~ysuenaga/JDK-8187402/webrev.00/>
> 
> 
> 
>                     Yasumasa
> 
> 
>                     On 2017/09/11 11:17, Yasumasa Suenaga wrote:
> 
>                         Hi all,
> 
>                         This review request is a part of [1].
> 
> 
>                         JBS:
>                         ??
>                         https://bugs.openjdk.java.net/browse/JDK-8187402
>                         <https://bugs.openjdk.java.net/browse/JDK-8187402>
> 
>                         webrev:
>                         ??
>                         http://cr.openjdk.java.net/~ysuenaga/JDK-8187402/webrev.00/
>                         <http://cr.openjdk.java.net/~ysuenaga/JDK-8187402/webrev.00/>
> 
> 
>                         I cannot access JPRT. So I need a sponsor.
> 
> 
>                         Thanks,
> 
>                         Yasumasa
> 
> 
>                         [1]
>                         http://mail.openjdk.java.net/pipermail/serviceability-dev/2017-September/021821.html
>                         <http://mail.openjdk.java.net/pipermail/serviceability-dev/2017-September/021821.html>
> 
> 
> 
>