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8049421: G1 Class Unloading after completing a concurrent mark cycle

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Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com>
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
This commit is contained in:
Stefan Karlsson 2014-07-07 10:12:40 +02:00
parent ef1e9b3c80
commit 1b001a2afd
75 changed files with 2169 additions and 874 deletions
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21
hotspot/src/share/vm/gc_implementation/g1/heapRegion.inline.hpp
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@ -93,18 +93,27 @@ G1OffsetTableContigSpace::block_start_const(const void* p) const {
inline bool
HeapRegion::block_is_obj(const HeapWord* p) const {
return p < top();
G1CollectedHeap* g1h = G1CollectedHeap::heap();
return !g1h->is_obj_dead(oop(p), this);
}
inline size_t
HeapRegion::block_size(const HeapWord *addr) const {
const HeapWord* current_top = top();
if (addr < current_top) {
return oop(addr)->size();
} else {
assert(addr == current_top, "just checking");
// Old regions' dead objects may have dead classes
// We need to find the next live object in some other
// manner than getting the oop size
G1CollectedHeap* g1h = G1CollectedHeap::heap();
if (g1h->is_obj_dead(oop(addr), this)) {
HeapWord* next = g1h->concurrent_mark()->prevMarkBitMap()->
getNextMarkedWordAddress(addr, prev_top_at_mark_start());
assert(next > addr, "must get the next live object");
return pointer_delta(next, addr);
} else if (addr == top()) {
return pointer_delta(end(), addr);
}
return oop(addr)->size();
}
inline HeapWord* HeapRegion::par_allocate_no_bot_updates(size_t word_size) {