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From Pavel Pervov <pmcfi...@gmail.com>
Subject Re: [drlvm][gc] What does an Partial_Reveal_Object object represents in GarabageCollector?
Date Thu, 19 Feb 2009 16:47:48 GMT
This is the data interface between the VM and a GC. GC must know some
details of object layout in the heap to be able to implement
collection algorithms efficiently.

Pavel.

On Thu, Feb 19, 2009 at 3:57 PM, Yuan Zhang <trojanyuan@gmail.com> wrote:
> Alexei,
> Thanks for your answer. Can I understand this problem in this way:
>     -----at the current edition of harmony, an Partial_Reveal_Object
> pointer is just casted from a ManagedObject pointer, and the purpose of the
> duplicate declaration of the struct is to minimize dependency between gc and
> vmcore because in the future the two structs may have different
> declarations.
>
> 2009/2/19 Alexei Fedotov <alexei.fedotov@gmail.com>
>
>> Yuan,
>> The intention of this construct is to minimize dependency between gc
>> and vmcore limiting interfaces to C-type ones. If you changed layout
>> of fields, you should update GC struct. If you only changed vt
>> functions, then probably the problem is in other place.
>>
>> Thanks.
>>
>> On Thu, Feb 19, 2009 at 3:09 PM, Yuan Zhang <trojanyuan@gmail.com> wrote:
>> > I have found that the declaration of struct ManagedObject and the
>> > declaration of struct Partial_Reveal_Object are alomost the same. The
>> only
>> > difference is that struct ManagedObject is used in vmcore, and struct
>> > Partial_Reveal_Object is used in gc, so I have a question: "Does a
>> > Partial_Reveal_Object pointer in gc always points to an ManagedObject
>> object
>> > in vmcore?". Because I have modified the declaration of struct
>> ManagedObject
>> > for some purpose, so if the answer to my question is "yes", I also have
>> to
>> > modify other codes to make gc run right?
>> >
>> > I appreciated any help from you!
>> >
>>
>>
>>
>> --
>> С уважением,
>> Алексей Федотов,
>> http://people.apache.org/~aaf/ <http://people.apache.org/%7Eaaf/>
>>
>

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