src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp

*** 1080,1100 ****
  // stable.  But being a free chunk may not be (because of parallel
  // promotion.)
  bool CompactibleFreeListSpace::block_is_obj(const HeapWord* p) const {
    FreeChunk* fc = (FreeChunk*)p;
    assert(is_in_reserved(p), "Should be in space");
-   // When doing a mark-sweep-compact of the CMS generation, this
-   // assertion may fail because prepare_for_compaction() uses
-   // space that is garbage to maintain information on ranges of
-   // live objects so that these live ranges can be moved as a whole.
-   // Comment out this assertion until that problem can be solved
-   // (i.e., that the block start calculation may look at objects
-   // at address below "p" in finding the object that contains "p"
-   // and those objects (if garbage) may have been modified to hold
-   // live range information.
-   // assert(CollectedHeap::use_parallel_gc_threads() || _bt.block_start(p) == p,
-   //        "Should be a block boundary");
    if (FreeChunk::indicatesFreeChunk(p)) return false;
    Klass* k = oop(p)->klass_or_null();
    if (k != NULL) {
      // Ignore mark word because it may have been used to
      // chain together promoted objects (the last one
--- 1080,1089 ----