10:07
Since I do not know which code comes from where, I am going to add into the debug information the source Java instruction similar to how lines are laid out, except this will be just Java instructions. I think this will help me pin-point where these issues might be since just doing line resolution alone is a bit difficult. Of course CallTraceElement can be given this information accordingly.
13:39
Okay so it seems my counts are off. Pretty sure there is an interaction with
the pointer to object. The Kernel object is stored into a local via ASTORE
then that local gets garbage collected. The pointerToObject does get a count
up which is good. This is all in jvmNewArray(). So the kernel object is in
register 23 (@416776b0, mem load from sfieldp). This is counted up. Then
checkcast copies 23 to 31 for ref queue. It performs the invoke. Counts are
not checked in jvmIsInstance at all. Then checkcast will clear the reference
queue so 31 gets uncounted. 23 is then stored into 20 via ASTORE. Then is
instance of done on 20. Then kernelNew is invoked off it. At @41677743 23
contains our newly allocated object. Then on IRETURN, register 20 is garbage
collected. So it seems refclear for the CHECKCAST is clearing the object
extra. But the array allocation is done in a loop as well. So it is very
possible that the transition code is off. Even if something might not change
because this means .... Taking a look at checkcast I can see how checkcast
might have an issue. It uses nocounting... but checkcast uses pop which the
input object is reference countable so that is why it is added to the enqueue.
Normally the stack is untouched. So this means a refclear should NOT be
done unless there is an exception where the object will be lost. Yeah and I
see checkcast doing the final ref clear, removing that should fix the
issues.
21:05
Added monitors and now I get the extra garbage collection. It is still related to ASTORE, thing time being ASTORE_3. Okay I just noticed that stores are doing exception checks. That definitely is an error.