Tue, 16 Jun 2020 11:03:04 +0800
8217647: JFR: recordings on 32-bit systems unreadable
Reviewed-by: egahlin
Contributed-by: boris.ulasevich@bell-sw.com, markus.gronlund@oracle.com
1 /*
2 * Copyright (c) 2016, 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
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23 */
25 #ifndef SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTWRITER_HPP
26 #define SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTWRITER_HPP
28 #include "jfr/recorder/checkpoint/jfrCheckpointBlob.hpp"
29 #include "jfr/recorder/storage/jfrBuffer.hpp"
30 #include "jfr/utilities/jfrTime.hpp"
31 #include "jfr/utilities/jfrTypes.hpp"
32 #include "jfr/writers/jfrEventWriterHost.inline.hpp"
33 #include "jfr/writers/jfrMemoryWriterHost.inline.hpp"
34 #include "jfr/writers/jfrStorageAdapter.hpp"
36 class Thread;
38 class JfrCheckpointFlush : public StackObj {
39 public:
40 typedef JfrBuffer Type;
41 JfrCheckpointFlush(Type* old, size_t used, size_t requested, Thread* t);
42 Type* result() { return _result; }
43 private:
44 Type* _result;
45 };
47 typedef Adapter<JfrCheckpointFlush> JfrCheckpointAdapter;
48 typedef AcquireReleaseMemoryWriterHost<JfrCheckpointAdapter, StackObj > JfrTransactionalCheckpointWriter;
49 typedef EventWriterHost<BigEndianEncoder, CompressedIntegerEncoder, JfrTransactionalCheckpointWriter> JfrCheckpointWriterBase;
51 struct JfrCheckpointContext {
52 int64_t offset;
53 u4 count;
54 };
56 class JfrCheckpointWriter : public JfrCheckpointWriterBase {
57 friend class JfrSerializerRegistration;
58 private:
59 JfrTicks _time;
60 int64_t _offset;
61 u4 _count;
62 bool _flushpoint;
63 bool _header;
65 u4 count() const;
66 void set_count(u4 count);
67 void increment();
68 void set_flushpoint(bool flushpoint);
69 bool is_flushpoint() const;
70 const u1* session_data(size_t* size, const JfrCheckpointContext* ctx = NULL);
71 void release();
73 public:
74 JfrCheckpointWriter(bool flushpoint, bool header, Thread* thread);
75 ~JfrCheckpointWriter();
76 void write_type(JfrTypeId type_id);
77 void write_count(u4 nof_entries);
78 void write_count(u4 nof_entries, int64_t offset);
79 void write_key(u8 key);
80 const JfrCheckpointContext context() const;
81 void set_context(const JfrCheckpointContext ctx);
82 bool has_data() const;
83 JfrCheckpointBlobHandle checkpoint_blob();
84 JfrCheckpointBlobHandle copy(const JfrCheckpointContext* ctx = NULL);
85 JfrCheckpointBlobHandle move(const JfrCheckpointContext* ctx = NULL);
86 };
88 #endif // SHARE_VM_JFR_RECORDER_CHECKPOINT_JFRCHECKPOINTWRITER_HPP