Pointer on clean card crosses boundary

[Tom Rodriguez]

They are required for all oop stores into the java heap except the  
ones that are executed as part of the new bytecode itself.  Do you do  
anything for aastore?

tom

On Aug 13, 2008, at 1:31 AM, Gary Benson wrote:

> Currently the only places I generate card marks are in putfield and
> putstatic.  The only other place I can think of where I store an oop
> is in the implementation of new, where the klass pointer is stored in
> the new object, but I didn't think you needed one there.  Where
> exactly do you need them?  You don't need them if you store an oop in
> the stack do you?
>
> Cheers,
> Gary
>
> Tony Printezis wrote:
>> Gary,
>>
>> Do you generate card marks for all reference stores?
>>
>> Tony
>>
>> Gary Benson wrote:
>>> Hi Tony,
>>>
>>> I'm working on a new compiler, which uses a third-party compiler
>>> toolkit (LLVM) rather than generating machine code directly.  I'm
>>> guessing I either allocated something incorrectly or I generated
>>> a broken oopmap, but I just wondered if there's some common thing
>>> that people do that would cause this error?
>>>
>>> Cheers,
>>> Gary
>>>
>>> Tony Printezis wrote:
>>>> Gary,
>>>>
>>>> I assume that the error happens with your changes? Can you give  
>>>> us a
>>>> quick description of what your changes involve?
>>>>
>>>> Tony
>>>>
>>>> Gary Benson wrote:
>>>>
>>>>> Hi all,
>>>>>
>>>>> I'm working on some additions to HotSpot, and I just found the
>>>>> VerifyBeforeGC and VerifyAfterGC options.  I tried them, but I'm
>>>>> seeing this failure:
>>>>>
>>>>> #  Internal Error
>>>>> (/home/gbenson/mixtec/openjdk-ecj/hotspot/src/share/vm/memory/ 
>>>>> cardTableRS.cpp:301), pid=19185, tid=3516646576
>>>>> #  Error: guarantee(*p == __null || (HeapWord*)p < boundary ||
>>>>> (HeapWord*)(*p) >= boundary,"pointer on clean card crosses  
>>>>> boundary")
>>>>>
>>>>> Does anyone know what I might be doing to cause this error?
>>>>>
>>>>> Cheers,
>>>>> Gary
>>>>>
>>>> -- 
>>>> ----------------------------------------------------------------------
>>>> | Tony Printezis, Staff Engineer    | Sun Microsystems  
>>>> Inc.          |
>>>> |                                   | MS  
>>>> BUR02-311                   |
>>>> | e-mail: tony.printezis at sun.com    | 35 Network  
>>>> Drive               |
>>>> | office: +1 781 442 0998 (x20998)  | Burlington, MA01803-0902,  
>>>> USA  |
>>>> ----------------------------------------------------------------------
>>>> e-mail client: Thunderbird (Solaris)
>>>>
>>>
>>>
>>
>> -- 
>> ----------------------------------------------------------------------
>> | Tony Printezis, Staff Engineer    | Sun Microsystems  
>> Inc.          |
>> |                                   | MS  
>> BUR02-311                   |
>> | e-mail: tony.printezis at sun.com    | 35 Network  
>> Drive               |
>> | office: +1 781 442 0998 (x20998)  | Burlington, MA01803-0902,  
>> USA  |
>> ----------------------------------------------------------------------
>> e-mail client: Thunderbird (Solaris)
>>
>>
>>
>
> -- 
> http://gbenson.net/