9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
26 #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
27
28 #include "memory/iterator.hpp"
29 #include "oops/oop.hpp"
30
31 class BitSet;
32 class Edge;
33 class EdgeStore;
34 class EdgeQueue;
35
36 // Class responsible for iterating the heap breadth-first
37 class BFSClosure : public ExtendedOopClosure { // XXX BasicOopIterateClosure
38 private:
39 EdgeQueue* _edge_queue;
40 EdgeStore* _edge_store;
41 BitSet* _mark_bits;
42 const Edge* _current_parent;
43 mutable size_t _current_frontier_level;
44 mutable size_t _next_frontier_idx;
45 mutable size_t _prev_frontier_idx;
46 size_t _dfs_fallback_idx;
47 bool _use_dfs;
48
49 void log_completed_frontier() const;
50 void log_dfs_fallback() const;
51
52 bool is_complete() const;
53 void step_frontier() const;
54
55 void closure_impl(const oop* reference, const oop pointee);
56 void add_chain(const oop* reference, const oop pointee);
57 void dfs_fallback();
58
59 void iterate(const Edge* parent);
60 void process(const oop* reference, const oop pointee);
61
62 void process_root_set();
63 void process_queue();
64
65 public:
66 BFSClosure(EdgeQueue* edge_queue, EdgeStore* edge_store, BitSet* mark_bits);
67 void process();
68
69 virtual void do_oop(oop* ref);
70 virtual void do_oop(narrowOop* ref);
71 };
72
73 #endif // SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
|
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
26 #define SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
27
28 #include "memory/iterator.hpp"
29
30 class BitSet;
31 class Edge;
32 class EdgeStore;
33 class EdgeQueue;
34
35 // Class responsible for iterating the heap breadth-first
36 class BFSClosure : public ExtendedOopClosure { // XXX BasicOopIterateClosure
37 private:
38 EdgeQueue* _edge_queue;
39 EdgeStore* _edge_store;
40 BitSet* _mark_bits;
41 const Edge* _current_parent;
42 mutable size_t _current_frontier_level;
43 mutable size_t _next_frontier_idx;
44 mutable size_t _prev_frontier_idx;
45 size_t _dfs_fallback_idx;
46 bool _use_dfs;
47
48 void log_completed_frontier() const;
49 void log_dfs_fallback() const;
50
51 bool is_complete() const;
52 void step_frontier() const;
53
54 void closure_impl(const oop* reference, const oop pointee);
55 void add_chain(const oop* reference, const oop pointee);
56 void dfs_fallback();
57
58 void iterate(const Edge* parent);
59 void process(const oop* reference, const oop pointee);
60
61 void process_root_set();
62 void process_queue();
63
64 public:
65 BFSClosure(EdgeQueue* edge_queue, EdgeStore* edge_store, BitSet* mark_bits);
66 void process();
67 void do_root(const oop* ref);
68
69 virtual void do_oop(oop* ref);
70 virtual void do_oop(narrowOop* ref);
71 };
72
73 #endif // SHARE_VM_JFR_LEAKPROFILER_CHAINS_BFSCLOSURE_HPP
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