1 /*
2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
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_GC_SHARED_C2_CARDTABLEBARRIERSETC2_HPP
26 #define SHARE_GC_SHARED_C2_CARDTABLEBARRIERSETC2_HPP
27
28 #include "gc/shared/c2/modRefBarrierSetC2.hpp"
29 #include "utilities/growableArray.hpp"
30
31 class CastP2XNode;
32
33 class BarrierSetC2State : public ResourceObj {
34 private:
35 GrowableArray<CastP2XNode*>* _enqueue_barriers;
36
37 public:
38 BarrierSetC2State(Arena* comp_arena);
39
40 int enqueue_barriers_count() const;
41 CastP2XNode* enqueue_barrier(int idx) const;
42 void add_enqueue_barrier(CastP2XNode* n);
43 void remove_enqueue_barrier(CastP2XNode* n);
44 bool is_a_barrier(CastP2XNode* n);
45 };
46
47
48 class CardTableBarrierSetC2: public ModRefBarrierSetC2 {
49 protected:
50 virtual void post_barrier(GraphKit* kit,
51 Node* ctl,
52 Node* store,
53 Node* obj,
54 Node* adr,
55 uint adr_idx,
56 Node* val,
57 BasicType bt,
58 bool use_precise) const;
59
60 Node* byte_map_base_node(GraphKit* kit) const;
61
62 public:
63 virtual void clone(GraphKit* kit, Node* src, Node* dst, Node* size, bool is_array) const;
64 virtual bool is_gc_barrier_node(Node* node) const;
65 virtual void eliminate_gc_barrier(PhaseMacroExpand* macro, Node* node) const;
66 virtual bool array_copy_requires_gc_barriers(bool tightly_coupled_alloc, BasicType type, bool is_clone, ArrayCopyPhase phase) const;
67 virtual bool process_barrier_node(Node* cast_node, PhaseIterGVN& igvn) const;
68 virtual Node* step_over_gc_barrier(Node* c) const;
69
70 bool use_ReduceInitialCardMarks() const;
71
72 BarrierSetC2State* state() const;
73
74 virtual void register_potential_barrier_node(Node* node) const;
75 virtual void unregister_potential_barrier_node(Node* node) const;
76 virtual bool expand_barriers(Compile* C, PhaseIterGVN& igvn) const;
77 virtual void* create_barrier_state(Arena* comp_arena) const;
78 };
79
80 #endif // SHARE_GC_SHARED_C2_CARDTABLEBARRIERSETC2_HPP