1 /*
 2  * Copyright (c) 2013, 2021, 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 #include "precompiled.hpp"
25 #include "compiler/compiler_globals.hpp"
26 #include "oops/method.hpp"
27 #include "oops/methodCounters.hpp"
28 #include "runtime/handles.inline.hpp"
29 
30 MethodCounters::MethodCounters(const methodHandle& mh) :
31   _prev_time(0),
32   _rate(0),
33   _highest_comp_level(0),
34   _highest_osr_comp_level(0)
35 {
36   set_interpreter_throwout_count(0);
37   JVMTI_ONLY(clear_number_of_breakpoints());
38   invocation_counter()->init();
39   backedge_counter()->init();
40 
41   // Set per-method thresholds.
42   double scale = 1.0;
43   CompilerOracle::has_option_value(mh, CompileCommand::CompileThresholdScaling, scale);
44 
45   _invoke_mask = right_n_bits(CompilerConfig::scaled_freq_log(Tier0InvokeNotifyFreqLog, scale)) << InvocationCounter::count_shift;
46   _backedge_mask = right_n_bits(CompilerConfig::scaled_freq_log(Tier0BackedgeNotifyFreqLog, scale)) << InvocationCounter::count_shift;
47 }
48 
49 MethodCounters* MethodCounters::allocate_no_exception(const methodHandle& mh) {
50   ClassLoaderData* loader_data = mh->method_holder()->class_loader_data();
51   return new(loader_data, method_counters_size(), MetaspaceObj::MethodCountersType) MethodCounters(mh);
52 }
53 
54 MethodCounters* MethodCounters::allocate_with_exception(const methodHandle& mh, TRAPS) {
55   ClassLoaderData* loader_data = mh->method_holder()->class_loader_data();
56   return new(loader_data, method_counters_size(), MetaspaceObj::MethodCountersType, THREAD) MethodCounters(mh);
57 }
58 
59 void MethodCounters::clear_counters() {
60   invocation_counter()->reset();
61   backedge_counter()->reset();
62   set_interpreter_throwout_count(0);
63   set_prev_time(0);
64   set_prev_event_count(0);
65   set_rate(0);
66   set_highest_comp_level(0);
67   set_highest_osr_comp_level(0);
68 }
69 
70 void MethodCounters::print_value_on(outputStream* st) const {
71   assert(is_methodCounters(), "must be methodCounters");
72   st->print("method counters");
73   print_address_on(st);
74 }
75 
76