1 /*
2 * Copyright (c) 2013, 2024, 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.
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23 */
24
25 #ifndef SHARE_OOPS_METHODCOUNTERS_HPP
26 #define SHARE_OOPS_METHODCOUNTERS_HPP
27
28 #include "oops/metadata.hpp"
29 #include "compiler/compilerDefinitions.hpp"
30 #include "interpreter/invocationCounter.hpp"
31 #include "utilities/align.hpp"
32
33 class MethodCounters : public MetaspaceObj {
34 friend class VMStructs;
35 friend class JVMCIVMStructs;
36 private:
37 InvocationCounter _invocation_counter; // Incremented before each activation of the method - used to trigger frequency-based optimizations
38 InvocationCounter _backedge_counter; // Incremented before each backedge taken - used to trigger frequency-based optimizations
39 jlong _prev_time; // Previous time the rate was acquired
40 float _rate; // Events (invocation and backedge counter increments) per millisecond
41 int _invoke_mask; // per-method Tier0InvokeNotifyFreqLog
42 int _backedge_mask; // per-method Tier0BackedgeNotifyFreqLog
43 int _prev_event_count; // Total number of events saved at previous callback
44 #if COMPILER2_OR_JVMCI
45 u2 _interpreter_throwout_count; // Count of times method was exited via exception while interpreting
46 #endif
47 #if INCLUDE_JVMTI
48 u2 _number_of_breakpoints; // fullspeed debugging support
49 #endif
50 u1 _highest_comp_level; // Highest compile level this method has ever seen.
51 u1 _highest_osr_comp_level; // Same for OSR level
52
53 MethodCounters(const methodHandle& mh);
54 public:
55 static MethodCounters* allocate_no_exception(const methodHandle& mh);
56 static MethodCounters* allocate_with_exception(const methodHandle& mh, TRAPS);
57
58 DEBUG_ONLY(bool on_stack() { return false; })
59 void deallocate_contents(ClassLoaderData* loader_data) {}
60
61 void metaspace_pointers_do(MetaspaceClosure* it) { return; }
62
63 static int size() {
64 return align_up((int)sizeof(MethodCounters), wordSize) / wordSize;
65 }
66
67 MetaspaceObj::Type type() const { return MethodCountersType; }
68 void clear_counters();
69
70 #if COMPILER2_OR_JVMCI
71 void interpreter_throwout_increment() {
72 if (_interpreter_throwout_count < 65534) {
73 _interpreter_throwout_count++;
74 }
75 }
76 u2 interpreter_throwout_count() const {
77 return _interpreter_throwout_count;
78 }
79 void set_interpreter_throwout_count(u2 count) {
80 _interpreter_throwout_count = count;
81 }
82 #else // COMPILER2_OR_JVMCI
83 u2 interpreter_throwout_count() const {
84 return 0;
85 }
86 void set_interpreter_throwout_count(u2 count) {
87 assert(count == 0, "count must be 0");
88 }
89 #endif // COMPILER2_OR_JVMCI
90
91 #if INCLUDE_JVMTI
92 u2 number_of_breakpoints() const { return _number_of_breakpoints; }
93 void incr_number_of_breakpoints() { ++_number_of_breakpoints; }
94 void decr_number_of_breakpoints() { --_number_of_breakpoints; }
95 void clear_number_of_breakpoints() { _number_of_breakpoints = 0; }
96 #endif
97
98 int prev_event_count() const { return _prev_event_count; }
99 void set_prev_event_count(int count) { _prev_event_count = count; }
100 jlong prev_time() const { return _prev_time; }
101 void set_prev_time(jlong time) { _prev_time = time; }
102 float rate() const { return _rate; }
103 void set_rate(float rate) { _rate = rate; }
104
105 int highest_comp_level() const { return _highest_comp_level; }
106 void set_highest_comp_level(int level) { _highest_comp_level = (u1)level; }
107 int highest_osr_comp_level() const { return _highest_osr_comp_level; }
108 void set_highest_osr_comp_level(int level) { _highest_osr_comp_level = (u1)level; }
109
110 // invocation counter
111 InvocationCounter* invocation_counter() { return &_invocation_counter; }
112 InvocationCounter* backedge_counter() { return &_backedge_counter; }
113
114 static ByteSize invocation_counter_offset() {
115 return byte_offset_of(MethodCounters, _invocation_counter);
116 }
117
118 static ByteSize backedge_counter_offset() {
119 return byte_offset_of(MethodCounters, _backedge_counter);
120 }
121
122 static ByteSize invoke_mask_offset() {
123 return byte_offset_of(MethodCounters, _invoke_mask);
124 }
125
126 static ByteSize backedge_mask_offset() {
127 return byte_offset_of(MethodCounters, _backedge_mask);
128 }
129
130 const char* internal_name() const { return "{method counters}"; }
131 void print_value_on(outputStream* st) const;
132 };
133 #endif // SHARE_OOPS_METHODCOUNTERS_HPP