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_GC_G1_G1ROOTPROCESSOR_HPP
26 #define SHARE_VM_GC_G1_G1ROOTPROCESSOR_HPP
27
28 #include "gc/shared/strongRootsScope.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/mutex.hpp"
31
32 class CLDClosure;
33 class CodeBlobClosure;
34 class G1CollectedHeap;
35 class G1GCPhaseTimes;
36 class G1ParPushHeapRSClosure;
37 class G1EvacuationRootClosureSet;
38 class G1RootClosureSet;
39 class Monitor;
40 class OopClosure;
41 class SubTasksDone;
42
43 // Scoped object to assist in applying oop, CLD and code blob closures to
44 // root locations. Handles claiming of different root scanning tasks
45 // and takes care of global state for root scanning via a StrongRootsScope.
46 // In the parallel case there is a shared G1RootProcessor object where all
47 // worker thread call the process_roots methods.
48 class G1RootProcessor : public StackObj {
49 G1CollectedHeap* _g1h;
50 SubTasksDone _process_strong_tasks;
51 StrongRootsScope _srs;
52
53 // Used to implement the Thread work barrier.
54 Monitor _lock;
55 volatile jint _n_workers_discovered_strong_classes;
56
57 enum G1H_process_roots_tasks {
58 G1RP_PS_Universe_oops_do,
59 G1RP_PS_JNIHandles_oops_do,
60 G1RP_PS_ObjectSynchronizer_oops_do,
61 G1RP_PS_FlatProfiler_oops_do,
62 G1RP_PS_Management_oops_do,
63 G1RP_PS_SystemDictionary_oops_do,
64 G1RP_PS_ClassLoaderDataGraph_oops_do,
65 G1RP_PS_jvmti_oops_do,
66 G1RP_PS_CodeCache_oops_do,
67 G1RP_PS_filter_satb_buffers,
68 G1RP_PS_refProcessor_oops_do,
69 // Leave this one last.
70 G1RP_PS_NumElements
71 };
72
73 void worker_has_discovered_all_strong_classes();
74 void wait_until_all_strong_classes_discovered();
75
76 void process_java_roots(G1RootClosureSet* closures,
77 G1GCPhaseTimes* phase_times,
78 uint worker_i);
79
80 void process_vm_roots(G1RootClosureSet* closures,
81 G1GCPhaseTimes* phase_times,
82 uint worker_i);
83
84 public:
85 G1RootProcessor(G1CollectedHeap* g1h, uint n_workers);
86
87 // Apply closures to the strongly and weakly reachable roots in the system
88 // in a single pass.
89 // Record and report timing measurements for sub phases using the worker_i
90 void evacuate_roots(G1EvacuationRootClosureSet* closures, bool trace_metadata, uint worker_i);
91
92 // Apply oops, clds and blobs to all strongly reachable roots in the system
93 void process_strong_roots(OopClosure* oops,
94 CLDClosure* clds,
95 CodeBlobClosure* blobs);
96
97 // Apply oops, clds and blobs to strongly and weakly reachable roots in the system
98 void process_all_roots(OopClosure* oops,
99 CLDClosure* clds,
100 CodeBlobClosure* blobs);
101
102 // Number of worker threads used by the root processor.
103 uint n_workers() const;
104 };
105
106 #endif // SHARE_VM_GC_G1_G1ROOTPROCESSOR_HPP
|
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_GC_G1_G1ROOTPROCESSOR_HPP
26 #define SHARE_VM_GC_G1_G1ROOTPROCESSOR_HPP
27
28 #include "gc/shared/strongRootsScope.hpp"
29 #include "memory/allocation.hpp"
30 #include "runtime/mutex.hpp"
31
32 class CLDClosure;
33 class CodeBlobClosure;
34 class G1CollectedHeap;
35 class G1GCPhaseTimes;
36 class G1ParPushHeapRSClosure;
37 class G1EvacuationRootClosures;
38 class G1RootClosures;
39 class Monitor;
40 class OopClosure;
41 class SubTasksDone;
42
43 // Scoped object to assist in applying oop, CLD and code blob closures to
44 // root locations. Handles claiming of different root scanning tasks
45 // and takes care of global state for root scanning via a StrongRootsScope.
46 // In the parallel case there is a shared G1RootProcessor object where all
47 // worker thread call the process_roots methods.
48 class G1RootProcessor : public StackObj {
49 G1CollectedHeap* _g1h;
50 SubTasksDone _process_strong_tasks;
51 StrongRootsScope _srs;
52
53 // Used to implement the Thread work barrier.
54 Monitor _lock;
55 volatile jint _n_workers_discovered_strong_classes;
56
57 enum G1H_process_roots_tasks {
58 G1RP_PS_Universe_oops_do,
59 G1RP_PS_JNIHandles_oops_do,
60 G1RP_PS_ObjectSynchronizer_oops_do,
61 G1RP_PS_FlatProfiler_oops_do,
62 G1RP_PS_Management_oops_do,
63 G1RP_PS_SystemDictionary_oops_do,
64 G1RP_PS_ClassLoaderDataGraph_oops_do,
65 G1RP_PS_jvmti_oops_do,
66 G1RP_PS_CodeCache_oops_do,
67 G1RP_PS_filter_satb_buffers,
68 G1RP_PS_refProcessor_oops_do,
69 // Leave this one last.
70 G1RP_PS_NumElements
71 };
72
73 void worker_has_discovered_all_strong_classes();
74 void wait_until_all_strong_classes_discovered();
75
76 void process_java_roots(G1RootClosures* closures,
77 G1GCPhaseTimes* phase_times,
78 uint worker_i);
79
80 void process_vm_roots(G1RootClosures* closures,
81 G1GCPhaseTimes* phase_times,
82 uint worker_i);
83
84 public:
85 G1RootProcessor(G1CollectedHeap* g1h, uint n_workers);
86
87 // Apply closures to the strongly and weakly reachable roots in the system
88 // in a single pass.
89 // Record and report timing measurements for sub phases using the worker_i
90 void evacuate_roots(G1EvacuationRootClosures* closures, bool trace_metadata, uint worker_i);
91
92 // Apply oops, clds and blobs to all strongly reachable roots in the system
93 void process_strong_roots(OopClosure* oops,
94 CLDClosure* clds,
95 CodeBlobClosure* blobs);
96
97 // Apply oops, clds and blobs to strongly and weakly reachable roots in the system
98 void process_all_roots(OopClosure* oops,
99 CLDClosure* clds,
100 CodeBlobClosure* blobs);
101
102 // Number of worker threads used by the root processor.
103 uint n_workers() const;
104 };
105
106 #endif // SHARE_VM_GC_G1_G1ROOTPROCESSOR_HPP
|