RFR : JDK-8067744 : XMM/SSE float register values corrupted by JNI_CreateVM call in JRE 8 (Windows)

[Dmitry Chuyko]

Thanks. Could someone be a sponsor for this?

-Dmitry

On 10/27/2016 05:19 PM, Vladimir Kozlov wrote:
> Looks good.
>
> thanks,
> Vladimir
>
> On 10/27/16 4:11 AM, Dmitry Chuyko wrote:
>> Now generate_get_cpu_info() preserves full xmm7,8,31 in AVX512 case 
>> and lower xmm7,8,15 in non-512 case (touched ones).
>>
>> Webrev: http://cr.openjdk.java.net/~vlivanov/dchuyko/8067744/webrev.01/
>>
>> General testing done, and new test passes with the patch on the 
>> machine where the bug is reproducible.
>>
>> Also thanks to Vladimir Ivanov for initial test draft and help with 
>> webrev.
>>
>> -Dmitry
>>
>> On 10/20/2016 08:25 PM, Vladimir Kozlov wrote:
>>> Hi Dmitry,
>>>
>>> New code does not restore whole 64-bit of xmm7,8,15 in AVX512 case. 
>>> I think you can totally separate save/restore for
>>> these cases.
>>>
>>> thanks,
>>> Vladimir
>>>
>>> On 10/19/16 4:49 AM, Dmitry Chuyko wrote:
>>>> Summary: Few xmm registers saved on stack and restored in
>>>> generate_get_cpu_info on Windows, a bit different on 2 detection 
>>>> paths.
>>>> New test calls native executable that loads jvm shared library and
>>>> checks if some double values are corrupted. The test reproduced the
>>>> problem on my machine with current devkit but not on Aurora.
>>>>
>>>> Bug: https://bugs.openjdk.java.net/browse/JDK-8067744
>>>>
>>>> Webrev: 
>>>> http://javaweb.us.oracle.com/~dchuyko/webrevs/8067744/webrev.00/
>>>>
>>>> ...............
>>>>
>>