Tue, 15 Mar 2011 06:35:10 -0700
7024234: 2/3 jvmti tests fail assert(!_oops_are_stale) failed: oops are stale on Win-AMD64
Summary: Move initialization of the '_instance' field to avoid race with ServiceThread start.
Reviewed-by: dholmes, kamg, never, dsamersoff, ysr, coleenp, acorn
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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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).
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15 * You should have received a copy of the GNU General Public License version
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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_RUNTIME_TIMER_HPP
26 #define SHARE_VM_RUNTIME_TIMER_HPP
28 #include "utilities/globalDefinitions.hpp"
30 // Timers for simple measurement.
32 class elapsedTimer VALUE_OBJ_CLASS_SPEC {
33 friend class VMStructs;
34 private:
35 jlong _counter;
36 jlong _start_counter;
37 bool _active;
38 public:
39 elapsedTimer() { _active = false; reset(); }
40 void add(elapsedTimer t);
41 void start();
42 void stop();
43 void reset() { _counter = 0; }
44 double seconds() const;
45 jlong milliseconds() const;
46 jlong ticks() const { return _counter; }
47 jlong active_ticks() const;
48 bool is_active() const { return _active; }
49 };
51 // TimeStamp is used for recording when an event took place.
52 class TimeStamp VALUE_OBJ_CLASS_SPEC {
53 private:
54 jlong _counter;
55 public:
56 TimeStamp() { _counter = 0; }
57 void clear() { _counter = 0; }
58 // has the timestamp been updated since being created or cleared?
59 bool is_updated() const { return _counter != 0; }
60 // update to current elapsed time
61 void update();
62 // update to given elapsed time
63 void update_to(jlong ticks);
64 // returns seconds since updated
65 // (must not be in a cleared state: must have been previously updated)
66 double seconds() const;
67 jlong milliseconds() const;
68 // ticks elapsed between VM start and last update
69 jlong ticks() const { return _counter; }
70 // ticks elapsed since last update
71 jlong ticks_since_update() const;
72 };
74 // TraceTime is used for tracing the execution time of a block
75 // Usage:
76 // { TraceTime t("block time")
77 // some_code();
78 // }
79 //
81 class TraceTime: public StackObj {
82 private:
83 bool _active; // do timing
84 bool _verbose; // report every timing
85 bool _print_cr; // add a CR to the end of the timer report
86 elapsedTimer _t; // timer
87 elapsedTimer* _accum; // accumulator
88 outputStream* _logfile; // output log file
89 public:
90 // Constuctors
91 TraceTime(const char* title,
92 bool doit = true,
93 bool print_cr = true,
94 outputStream *logfile = NULL);
95 TraceTime(const char* title,
96 elapsedTimer* accumulator,
97 bool doit = true,
98 bool verbose = false,
99 outputStream *logfile = NULL );
100 ~TraceTime();
102 // Accessors
103 void set_verbose(bool verbose) { _verbose = verbose; }
104 bool verbose() const { return _verbose; }
106 // Activation
107 void suspend() { if (_active) _t.stop(); }
108 void resume() { if (_active) _t.start(); }
109 };
111 class TraceCPUTime: public StackObj {
112 private:
113 bool _active; // true if times will be measured and printed
114 bool _print_cr; // if true print carriage return at end
115 double _starting_user_time; // user time at start of measurement
116 double _starting_system_time; // system time at start of measurement
117 double _starting_real_time; // real time at start of measurement
118 outputStream* _logfile; // output is printed to this stream
119 bool _error; // true if an error occurred, turns off output
121 public:
122 TraceCPUTime(bool doit = true,
123 bool print_cr = true,
124 outputStream *logfile = NULL);
125 ~TraceCPUTime();
126 };
128 #endif // SHARE_VM_RUNTIME_TIMER_HPP