Pointer on clean card crosses boundary

[Gary Benson]

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)
> 
> 
> 

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