1 /*
2 * Copyright (c) 2015, 2018, Red Hat, Inc. All rights reserved.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.
7 *
8 * This code is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * version 2 for more details (a copy is included in the LICENSE file that
12 * accompanied this code).
13 *
14 * You should have received a copy of the GNU General Public License version
15 * 2 along with this work; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 *
22 */
23
24 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_HPP
25 #define SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_HPP
26
27 #include "code/codeCache.hpp"
28 #include "gc/shared/oopStorageParState.hpp"
29 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
30 #include "gc/shenandoah/shenandoahHeap.hpp"
31 #include "gc/shenandoah/shenandoahPhaseTimings.hpp"
32 #include "gc/shared/strongRootsScope.hpp"
33 #include "gc/shared/workgroup.hpp"
34 #include "memory/allocation.hpp"
35 #include "memory/iterator.hpp"
36
37 class ParallelCLDRootIterator {
38 public:
39 ParallelCLDRootIterator();
40 void root_cld_do(CLDClosure* strong, CLDClosure* weak);
41 };
42
43 enum Shenandoah_process_roots_tasks {
44 SHENANDOAH_RP_PS_Universe_oops_do,
45 SHENANDOAH_RP_PS_JNIHandles_oops_do,
46 SHENANDOAH_RP_PS_JNIHandles_weak_oops_do,
47 SHENANDOAH_RP_PS_ObjectSynchronizer_oops_do,
48 SHENANDOAH_RP_PS_Management_oops_do,
49 SHENANDOAH_RP_PS_SystemDictionary_oops_do,
50 SHENANDOAH_RP_PS_jvmti_oops_do,
51 // Leave this one last.
52 SHENANDOAH_RP_PS_NumElements
53 };
54
55 class ShenandoahRootProcessor : public StackObj {
56 SubTasksDone* _process_strong_tasks;
57 StrongRootsScope _srs;
58 OopStorage::ParState<false, false> _par_state_string;
59 ShenandoahPhaseTimings::Phase _phase;
60 ParallelCLDRootIterator _cld_iterator;
61 ShenandoahAllCodeRootsIterator _coderoots_all_iterator;
62 CodeBlobClosure* _threads_nmethods_cl;
63
64 void process_java_roots(OopClosure* scan_non_heap_roots,
65 CLDClosure* scan_strong_clds,
66 CLDClosure* scan_weak_clds,
67 CodeBlobClosure* scan_strong_code,
68 ThreadClosure* thread_cl,
69 uint worker_i);
70
71 void process_vm_roots(OopClosure* scan_non_heap_roots,
72 OopClosure* scan_non_heap_weak_roots,
73 OopClosure* weak_jni_roots,
74 uint worker_i);
75
76 public:
77 ShenandoahRootProcessor(ShenandoahHeap* heap, uint n_workers,
78 ShenandoahPhaseTimings::Phase phase);
79 ~ShenandoahRootProcessor();
80
81 // Apply oops, clds and blobs to all strongly reachable roots in the system
82 void process_strong_roots(OopClosure* oops, OopClosure* weak_oops,
83 CLDClosure* clds,
84 CLDClosure* weak_clds,
85 CodeBlobClosure* blobs,
86 ThreadClosure* thread_cl,
87 uint worker_id);
88
89 // Apply oops, clds and blobs to strongly and weakly reachable roots in the system
90 void process_all_roots(OopClosure* oops, OopClosure* weak_oops,
91 CLDClosure* clds,
92 CodeBlobClosure* blobs,
93 ThreadClosure* thread_cl,
94 uint worker_id);
95
96 // For slow debug/verification code
97 void process_all_roots_slow(OopClosure* oops);
98
99 // Number of worker threads used by the root processor.
100 uint n_workers() const;
101 };
102
103 class ShenandoahRootEvacuator : public StackObj {
104 SubTasksDone* _evacuation_tasks;
105 StrongRootsScope _srs;
106 ShenandoahPhaseTimings::Phase _phase;
107 ShenandoahCsetCodeRootsIterator _coderoots_cset_iterator;
108
109 enum Shenandoah_evacuate_roots_tasks {
110 SHENANDOAH_EVAC_jvmti_oops_do,
111 // Leave this one last.
112 SHENANDOAH_EVAC_NumElements
113 };
114 public:
115 ShenandoahRootEvacuator(ShenandoahHeap* heap, uint n_workers,
116 ShenandoahPhaseTimings::Phase phase);
117 ~ShenandoahRootEvacuator();
118
119 void process_evacuate_roots(OopClosure* oops,
120 CodeBlobClosure* blobs,
121 uint worker_id);
122
123 // Number of worker threads used by the root processor.
124 uint n_workers() const;
125 };
126 #endif // SHARE_GC_SHENANDOAH_SHENANDOAHROOTPROCESSOR_HPP