RFR(S): JDK-8203481 Incorrect constraint for unextended_sp in frame:safe_for_sender

[David Holmes]

Hi Dmitry,

I have to admit I still can't connect all the pieces here. When we are 
operating in frame::safe_for_sender, what has set _unextended_sp? Can 
you walk through a complete example? I can't quite connect Andrew's 
example to the original problem.

It still seems to me that the current frame should have:

sp <= unextended_sp <= stack_base()

??

Thanks,
David

On 11/06/2018 2:54 AM, Dmitry Samersoff wrote:
> Hello Everybody,
> 
> Please, review updated webrev:
> 
> http://cr.openjdk.java.net/~dsamersoff/JDK-8203481/webrev.02
> 
> CR link:
> 
> https://bugs.openjdk.java.net/browse/JDK-8203481
> 
> -Dmitry
> 
> On 05/21/2018 04:44 PM, Dmitry Samersoff wrote:
>> Hello Everybody,
>>
>> Please review small fix
>>
>> http://cr.openjdk.java.net/~dsamersoff/JDK-8203481/webrev.01/
>>
>> CR:
>>
>> https://bugs.openjdk.java.net/browse/JDK-8203481
>>
>> Testing:
>>
>> jfr tests that depends to safe_for_sender functionality
>>
>> ./jdk/jdk/jfr/api/consumer/TestRecordedFullStackTrace.java
>> ./jdk/jdk/jfr/event/profiling/TestFullStackTrace.java
>>
>> fails on AARCH64.
>>
>> These tests passed after the fix.
>>
>>
> 
>