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6863023: need non-perm oops in code cache for JSR 292

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Make a special root-list for those few nmethods which might contain non-perm oops.

Reviewed-by: twisti, kvn, never, jmasa, ysr
This commit is contained in:
John R Rose 2009-09-15 21:53:47 -07:00
parent 1cf5b7ae11
commit e261aecad8
74 changed files with 979 additions and 279 deletions
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8
hotspot/src/share/vm/gc_interface/collectedHeap.hpp
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@ -256,6 +256,14 @@ class CollectedHeap : public CHeapObj {
return p == NULL || is_in_permanent(p);
}
// An object is scavengable if its location may move during a scavenge.
// (A scavenge is a GC which is not a full GC.)
// Currently, this just means it is not perm (and not null).
// This could change if we rethink what's in perm-gen.
bool is_scavengable(const void *p) const {
return !is_in_permanent_or_null(p);
}
// Returns "TRUE" if "p" is a method oop in the
// current heap, with high probability. This predicate
// is not stable, in general.