src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp

rev 6067 : 8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly

*** 4725,4734 ****
--- 4725,4740 ----
    Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes);
  
    oop forward_ptr = old->forward_to_atomic(obj);
    if (forward_ptr == NULL) {
      Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz);
+ 
+     // alloc_purpose is just a hint to allocate() above, recheck the type of region
+     // we actually allocated from and update alloc_purpose accordingly
+     HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr);
+     alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured;
+ 
      if (g1p->track_object_age(alloc_purpose)) {
        // We could simply do obj->incr_age(). However, this causes a
        // performance issue. obj->incr_age() will first check whether
        // the object has a displaced mark by checking its mark word;
        // getting the mark word from the new location of the object