1 // Copyright 2012 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are
4 // met:
5 //
6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided
11 // with the distribution.
12 // * Neither the name of Google Inc. nor the names of its
13 // contributors may be used to endorse or promote products derived
14 // from this software without specific prior written permission.
15 //
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28 #include "v8.h"
29
30 #include "counters.h"
31 #include "isolate.h"
32 #include "platform.h"
33
34 namespace v8 {
35 namespace internal {
36
StatsTable()37 StatsTable::StatsTable()
38 : lookup_function_(NULL),
39 create_histogram_function_(NULL),
40 add_histogram_sample_function_(NULL) {}
41
42
FindLocationInStatsTable() const43 int* StatsCounter::FindLocationInStatsTable() const {
44 return isolate_->stats_table()->FindLocation(name_);
45 }
46
47
AddSample(int sample)48 void Histogram::AddSample(int sample) {
49 if (Enabled()) {
50 isolate()->stats_table()->AddHistogramSample(histogram_, sample);
51 }
52 }
53
CreateHistogram() const54 void* Histogram::CreateHistogram() const {
55 return isolate()->stats_table()->
56 CreateHistogram(name_, min_, max_, num_buckets_);
57 }
58
59
60 // Start the timer.
Start()61 void HistogramTimer::Start() {
62 if (Enabled()) {
63 timer_.Start();
64 }
65 if (FLAG_log_internal_timer_events) {
66 LOG(isolate(), TimerEvent(Logger::START, name()));
67 }
68 }
69
70
71 // Stop the timer and record the results.
Stop()72 void HistogramTimer::Stop() {
73 if (Enabled()) {
74 // Compute the delta between start and stop, in milliseconds.
75 AddSample(static_cast<int>(timer_.Elapsed().InMilliseconds()));
76 timer_.Stop();
77 }
78 if (FLAG_log_internal_timer_events) {
79 LOG(isolate(), TimerEvent(Logger::END, name()));
80 }
81 }
82
83 } } // namespace v8::internal
84