src/share/vm/jfr/leakprofiler/leakProfiler.hpp

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1 /*
2 * Copyright (c) 2014, 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_VM_JFR_LEAKPROFILER_LEAKPROFILER_HPP
26 #define SHARE_VM_JFR_LEAKPROFILER_LEAKPROFILER_HPP
27
28 #include "memory/allocation.hpp"
29
30 class BoolObjectClosure;
31 class ObjectSampler;
32 class OopClosure;
33 class Thread;
34
35 class LeakProfiler : public AllStatic {
36 friend class ClassUnloadTypeSet;
37 friend class EmitEventOperation;
38 friend class ObjectSampleCheckpoint;
39 friend class StartOperation;
40 friend class StopOperation;
41 friend class TypeSet;
42 friend class WriteObjectSampleStacktrace;
43
44 private:
45 static ObjectSampler* _object_sampler;
46
47 static void set_object_sampler(ObjectSampler* object_sampler);
48 static ObjectSampler* object_sampler();
49
50 static void suspend();
51 static void resume();
52 static bool is_suspended();
53
54 public:
55 static bool start(jint sample_count);
56 static bool stop();
57 static void emit_events(jlong cutoff_ticks, bool emit_all);
58 static bool is_running();
59
60 static void sample(HeapWord* object, size_t size, JavaThread* thread);
61
62 // Called by GC
63 static void oops_do(BoolObjectClosure* is_alive, OopClosure* f);
64 };
65
66 #endif // SHARE_VM_JFR_LEAKPROFILER_LEAKPROFILER_HPP

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