Wed, 17 Jun 2020 11:43:05 +0300
8220293: Deadlock in JFR string pool
Reviewed-by: rehn, egahlin
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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7 * published by the Free Software Foundation.
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #ifndef SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_HPP
26 #define SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_HPP
28 #include "jfr/recorder/storage/jfrBuffer.hpp"
29 #include "jfr/recorder/repository/jfrChunkWriter.hpp"
30 #include "jfr/utilities/jfrAllocation.hpp"
31 #include "jfr/utilities/jfrTypes.hpp"
32 #include "runtime/thread.hpp"
34 template <typename Operation, typename NextOperation>
35 class CompositeOperation {
36 private:
37 Operation* _op;
38 NextOperation* _next;
39 public:
40 CompositeOperation(Operation* op, NextOperation* next) : _op(op), _next(next) {
41 assert(_op != NULL, "invariant");
42 }
43 typedef typename Operation::Type Type;
44 bool process(Type* t = NULL) {
45 return _next == NULL ? _op->process(t) : _op->process(t) && _next->process(t);
46 }
47 size_t processed() const {
48 return _next == NULL ? _op->processed() : _op->processed() + _next->processed();
49 }
50 };
52 template <typename T>
53 class UnBufferedWriteToChunk {
54 private:
55 JfrChunkWriter& _writer;
56 size_t _processed;
57 public:
58 typedef T Type;
59 UnBufferedWriteToChunk(JfrChunkWriter& writer) : _writer(writer), _processed(0) {}
60 bool write(Type* t, const u1* data, size_t size);
61 size_t processed() { return _processed; }
62 };
64 template <typename T>
65 class DefaultDiscarder {
66 private:
67 size_t _processed;
68 public:
69 typedef T Type;
70 DefaultDiscarder() : _processed() {}
71 bool discard(Type* t, const u1* data, size_t size);
72 size_t processed() const { return _processed; }
73 };
75 template <typename Operation>
76 class ConcurrentWriteOp {
77 private:
78 Operation& _operation;
79 public:
80 typedef typename Operation::Type Type;
81 ConcurrentWriteOp(Operation& operation) : _operation(operation) {}
82 bool process(Type* t);
83 size_t processed() const { return _operation.processed(); }
84 };
86 template <typename Operation>
87 class ConcurrentWriteOpExcludeRetired : private ConcurrentWriteOp<Operation> {
88 public:
89 typedef typename Operation::Type Type;
90 ConcurrentWriteOpExcludeRetired(Operation& operation) : ConcurrentWriteOp<Operation>(operation) {}
91 bool process(Type* t);
92 size_t processed() const { return ConcurrentWriteOp<Operation>::processed(); }
93 };
95 template <typename Operation>
96 class MutexedWriteOp {
97 private:
98 Operation& _operation;
99 public:
100 typedef typename Operation::Type Type;
101 MutexedWriteOp(Operation& operation) : _operation(operation) {}
102 bool process(Type* t);
103 size_t processed() const { return _operation.processed(); }
104 };
106 template <typename Operation>
107 class ExclusiveOp : private MutexedWriteOp<Operation> {
108 public:
109 typedef typename Operation::Type Type;
110 ExclusiveOp(Operation& operation) : MutexedWriteOp<Operation>(operation) {}
111 bool process(Type* t);
112 size_t processed() const { return MutexedWriteOp<Operation>::processed(); }
113 };
115 enum jfr_operation_mode {
116 mutexed = 1,
117 concurrent
118 };
120 template <typename Operation>
121 class DiscardOp {
122 private:
123 Operation _operation;
124 jfr_operation_mode _mode;
125 public:
126 typedef typename Operation::Type Type;
127 DiscardOp(jfr_operation_mode mode = concurrent) : _operation(), _mode(mode) {}
128 bool process(Type* t);
129 size_t processed() const { return _operation.processed(); }
130 };
132 #endif // SHARE_VM_JFR_RECORDER_STORAGE_JFRSTORAGEUTILS_HPP