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 37 StatsTable::StatsTable() 38 : lookup_function_(NULL), 39 create_histogram_function_(NULL), 40 add_histogram_sample_function_(NULL) {} 41 42 43 int* StatsCounter::FindLocationInStatsTable() const { 44 return isolate_->stats_table()->FindLocation(name_); 45 } 46 47 48 void Histogram::AddSample(int sample) { 49 if (Enabled()) { 50 isolate()->stats_table()->AddHistogramSample(histogram_, sample); 51 } 52 } 53 54 void* Histogram::CreateHistogram() const { 55 return isolate()->stats_table()-> 56 CreateHistogram(name_, min_, max_, num_buckets_); 57 } 58 59 60 // Start the timer. 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. 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
