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
69
70
71
72
73
74
75
76
77
|
// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef V8_RUNTIME_PROFILER_H_
#define V8_RUNTIME_PROFILER_H_
#include "v8.h"
#include "allocation.h"
namespace v8 {
namespace internal {
class RuntimeProfiler : public AllStatic {
public:
static bool IsEnabled() { return V8::UseCrankshaft() && FLAG_opt; }
static void OptimizeNow();
static void OptimizeSoon(JSFunction* function);
static void NotifyTick();
static void Setup();
static void Reset();
static void TearDown();
static int SamplerWindowSize();
static void UpdateSamplesAfterScavenge();
static void RemoveDeadSamples();
static void UpdateSamplesAfterCompact(ObjectVisitor* visitor);
};
// Rate limiter intended to be used in the profiler thread.
class RuntimeProfilerRateLimiter BASE_EMBEDDED {
public:
RuntimeProfilerRateLimiter() : non_js_ticks_(0) { }
// Suspends the current thread when not executing JavaScript to
// minimize CPU usage. Returns whether this thread was suspended
// (and so might have to check whether profiling is still active.)
//
// Does nothing when runtime profiling is not enabled.
bool SuspendIfNecessary();
private:
int non_js_ticks_;
DISALLOW_COPY_AND_ASSIGN(RuntimeProfilerRateLimiter);
};
} } // namespace v8::internal
#endif // V8_RUNTIME_PROFILER_H_
|
