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6784849: par compact - can fail when to_space is non-empty

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Reviewed-by: jmasa, tonyp
This commit is contained in:
John Coomes 2008-12-18 10:53:35 -08:00
parent a88e734cac
commit f90394b6fb
2 changed files with 47 additions and 32 deletions
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15
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp
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@ -1154,8 +1154,10 @@ class PSParallelCompact : AllStatic {
HeapWord* end_addr);
// Decrement the destination count for each non-empty source region in the
// range [beg_region, region(region_align_up(end_addr))).
// range [beg_region, region(region_align_up(end_addr))). If the destination
// count for a region goes to 0 and it needs to be filled, enqueue it.
static void decrement_destination_counts(ParCompactionManager* cm,
SpaceId src_space_id,
size_t beg_region,
HeapWord* end_addr);
@ -1230,6 +1232,8 @@ class PSParallelCompact : AllStatic {
#endif // #ifndef PRODUCT
#ifdef ASSERT
// Sanity check the new location of a word in the heap.
static inline void check_new_location(HeapWord* old_addr, HeapWord* new_addr);
// Verify that all the regions have been emptied.
static void verify_complete(SpaceId space_id);
#endif // #ifdef ASSERT
@ -1397,6 +1401,15 @@ inline void PSParallelCompact::adjust_pointer(T* p,
}
}
#ifdef ASSERT
inline void
PSParallelCompact::check_new_location(HeapWord* old_addr, HeapWord* new_addr)
{
assert(old_addr >= new_addr || space_id(old_addr) != space_id(new_addr),
"must move left or to a different space");
}
#endif // ASSERT
class MoveAndUpdateClosure: public ParMarkBitMapClosure {
public:
inline MoveAndUpdateClosure(ParMarkBitMap* bitmap, ParCompactionManager* cm,