thank you very much.
2008/4/8, Xiao-Feng Li <[EMAIL PROTECTED]>: > > Lyon, please ignore the function trace_forwarded_gen_jlC_from_vtable. > They should be removed. It was an old design with weakroot and class > unloading. > > To explain what it does, I should mention what weakroot is. Weakroot > is some root references that are not considered to be used for > liveness (reachability) identification. That is, the objects only > pointed by weakroots are not live. We need know them in GC. When an > live object also pointed to by a weakroot is moved by GC, we need > update the weakroot to point to the new location. > > When an object (JLC instance) is not pointed to by any live objects, > it may still have object instances. The instance object has pointer to > Vtable, and the Vtable has pointer to the JLC instance. That means, it > is still in use. We need find them and move them accordingly in > collection. > > Anyway, please ignore the code guarded with TRACE_JLC_VIA_VTABLE > condition, unless you really hit some problem with them. > > Thanks, > xiaofeng > > > On Tue, Apr 8, 2008 at 4:07 PM, lyon <[EMAIL PROTECTED]> wrote: > > hi everyone > > > > I am reading the gc src.I don't understand what is "jlc" that is member > > var of the vtable.there are two functions "forward_jlc_instance" and > > "trace_forwarded_gen_jlC_from_vtable" in the \gc_gen\src\trace_forward. > > > > What do the fuctions mean? > > thank you. > > > > > > > -- > http://xiao-feng.blogspot.com >
