init repo

ronnie

2022-10-14 1504bb53e29d3d46222c0b3ea994fc494b48e153

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef V8_COUNTERS_INL_H_
#define V8_COUNTERS_INL_H_
 
#include "src/counters.h"
 
namespace v8 {
namespace internal {
 
void RuntimeCallTimer::Start(RuntimeCallCounter* counter,
                             RuntimeCallTimer* parent) {
  DCHECK(!IsStarted());
  counter_ = counter;
  parent_.SetValue(parent);
  if (base::AsAtomic32::Relaxed_Load(&FLAG_runtime_stats) ==
      v8::tracing::TracingCategoryObserver::ENABLED_BY_SAMPLING) {
    return;
  }
  base::TimeTicks now = RuntimeCallTimer::Now();
  if (parent) parent->Pause(now);
  Resume(now);
  DCHECK(IsStarted());
}
 
void RuntimeCallTimer::Pause(base::TimeTicks now) {
  DCHECK(IsStarted());
  elapsed_ += (now - start_ticks_);
  start_ticks_ = base::TimeTicks();
}
 
void RuntimeCallTimer::Resume(base::TimeTicks now) {
  DCHECK(!IsStarted());
  start_ticks_ = now;
}
 
RuntimeCallTimer* RuntimeCallTimer::Stop() {
  if (!IsStarted()) return parent();
  base::TimeTicks now = RuntimeCallTimer::Now();
  Pause(now);
  counter_->Increment();
  CommitTimeToCounter();
 
  RuntimeCallTimer* parent_timer = parent();
  if (parent_timer) {
    parent_timer->Resume(now);
  }
  return parent_timer;
}
 
void RuntimeCallTimer::CommitTimeToCounter() {
  counter_->Add(elapsed_);
  elapsed_ = base::TimeDelta();
}
 
bool RuntimeCallTimer::IsStarted() { return start_ticks_ != base::TimeTicks(); }
 
RuntimeCallTimerScope::RuntimeCallTimerScope(Isolate* isolate,
                                             HeapObject* heap_object,
                                             RuntimeCallCounterId counter_id)
    : RuntimeCallTimerScope(isolate, counter_id) {}
 
}  // namespace internal
}  // namespace v8
 
#endif  // V8_COUNTERS_INL_H_