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7097053: G1: assert(da ? referent->is_oop() : referent->is_oop_or_null()) failed: referenceProcessor.cpp:1054

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During remembered set scanning, the reference processor could discover a reference object whose referent was in the process of being copied and so may not be completely initialized. Do not perform reference discovery during remembered set scanning.

Reviewed-by: tonyp, ysr
This commit is contained in:
John Cuthbertson 2011-10-03 12:49:53 -07:00
parent bbfe9c6e25
commit 02e9894454
4 changed files with 12 additions and 57 deletions
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10
hotspot/src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp
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@ -4618,15 +4618,7 @@ public:
scan_perm_cl = &scan_mark_perm_cl;
}
// The following closure is used to scan RSets looking for reference
// fields that point into the collection set. The actual field iteration
// is performed by a FilterIntoCSClosure, whose do_oop method calls the
// do_oop method of the following closure.
// Therefore we want to record the reference processor in the
// FilterIntoCSClosure. To do so we record the STW reference
// processor into the following closure and pass it to the
// FilterIntoCSClosure in HeapRegionDCTOC::walk_mem_region_with_cl.
G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss, rp);
G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss);
pss.start_strong_roots();
_g1h->g1_process_strong_roots(/* not collecting perm */ false,