RFR(xs): 8073115: assert(_covered_region.contains(p)) needs better error messages

Sangheon Kim sangheon.kim at oracle.com
Fri Feb 13 17:41:40 UTC 2015

Hi StefanK,

Thanks for reviewing this and please see inline.

On 02/13/2015 01:07 AM, Stefan Karlsson wrote:
> Hi Sangheon,
> On 2015-02-13 07:54, Sangheon Kim wrote:
>> Hi All,
>> Please review this small enhancement for better error messages when assert fails.
>> This change would be helpful forJDK-8071930  <https://bugs.openjdk.java.net/browse/JDK-8071930>  which is hard to reproduce.
>> I will need a sponsor for this change.
>> CR:
>> https://bugs.openjdk.java.net/browse/JDK-8073115
>> Webrev:
>> http://cr.openjdk.java.net/~sangheki/8073115/webrev.00/
> http://cr.openjdk.java.net/~sangheki/8073115/webrev.00/src/share/vm/gc_implementation/parallelScavenge/objectStartArray.hpp.udiff.html
> You are duplicating the same assert three times. Could you create a 
> new define, say #define assert_covered_region_contains(addr) ..., and 
> remove the duplication? This will also have the benefit of lowering 
> the line noise in the functions you change.
Basically I agree with you.
But in this case I think the benefit of macro is limited to reduce 3 
lines than current proposal.
Unless this macro moves to general header file, its usage would be limited.
So let me skip adding a new macro at this time.


> Thanks,
> StefanK
>> Testing:
>> Thanks,
>> Sangheon

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