1378 // Iteration functions.
1379
1380 // Iterate over all the ref-containing fields of all objects, calling
1381 // "cl.do_oop" on each.
1382 virtual void oop_iterate(ExtendedOopClosure* cl);
1383
1384 // Iterate over all objects, calling "cl.do_object" on each.
1385 virtual void object_iterate(ObjectClosure* cl);
1386
1387 virtual void safe_object_iterate(ObjectClosure* cl) {
1388 object_iterate(cl);
1389 }
1390
1391 // Iterate over all spaces in use in the heap, in ascending address order.
1392 virtual void space_iterate(SpaceClosure* cl);
1393
1394 // Iterate over heap regions, in address order, terminating the
1395 // iteration early if the "doHeapRegion" method returns "true".
1396 void heap_region_iterate(HeapRegionClosure* blk) const;
1397
1398 // Return the region with the given index. It assumes the index is valid.
1399 inline HeapRegion* region_at(uint index) const;
1400
1401 // Calculate the region index of the given address. Given address must be
1402 // within the heap.
1403 inline uint addr_to_region(HeapWord* addr) const;
1404
1405 inline HeapWord* bottom_addr_for_region(uint index) const;
1406
1407 // Divide the heap region sequence into "chunks" of some size (the number
1408 // of regions divided by the number of parallel threads times some
1409 // overpartition factor, currently 4). Assumes that this will be called
1410 // in parallel by ParallelGCThreads worker threads with distinct worker
1411 // ids in the range [0..max(ParallelGCThreads-1, 1)], that all parallel
1412 // calls will use the same "claim_value", and that that claim value is
1413 // different from the claim_value of any heap region before the start of
1414 // the iteration. Applies "blk->doHeapRegion" to each of the regions, by
1415 // attempting to claim the first region in each chunk, and, if
1416 // successful, applying the closure to each region in the chunk (and
1417 // setting the claim value of the second and subsequent regions of the
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1378 // Iteration functions.
1379
1380 // Iterate over all the ref-containing fields of all objects, calling
1381 // "cl.do_oop" on each.
1382 virtual void oop_iterate(ExtendedOopClosure* cl);
1383
1384 // Iterate over all objects, calling "cl.do_object" on each.
1385 virtual void object_iterate(ObjectClosure* cl);
1386
1387 virtual void safe_object_iterate(ObjectClosure* cl) {
1388 object_iterate(cl);
1389 }
1390
1391 // Iterate over all spaces in use in the heap, in ascending address order.
1392 virtual void space_iterate(SpaceClosure* cl);
1393
1394 // Iterate over heap regions, in address order, terminating the
1395 // iteration early if the "doHeapRegion" method returns "true".
1396 void heap_region_iterate(HeapRegionClosure* blk) const;
1397
1398 // Iterate over heap regions in the interval [start, end), applying the given closure.
1399 // Terminates early if closure "doHeapRegion" returns true.
1400 void heap_region_iterate_range(HeapRegionClosure* cl, uint start, uint end) const;
1401
1402 // Return the region with the given index. It assumes the index is valid.
1403 inline HeapRegion* region_at(uint index) const;
1404
1405 // Calculate the region index of the given address. Given address must be
1406 // within the heap.
1407 inline uint addr_to_region(HeapWord* addr) const;
1408
1409 inline HeapWord* bottom_addr_for_region(uint index) const;
1410
1411 // Divide the heap region sequence into "chunks" of some size (the number
1412 // of regions divided by the number of parallel threads times some
1413 // overpartition factor, currently 4). Assumes that this will be called
1414 // in parallel by ParallelGCThreads worker threads with distinct worker
1415 // ids in the range [0..max(ParallelGCThreads-1, 1)], that all parallel
1416 // calls will use the same "claim_value", and that that claim value is
1417 // different from the claim_value of any heap region before the start of
1418 // the iteration. Applies "blk->doHeapRegion" to each of the regions, by
1419 // attempting to claim the first region in each chunk, and, if
1420 // successful, applying the closure to each region in the chunk (and
1421 // setting the claim value of the second and subsequent regions of the
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