blob: c17dd3e804be31d61d6e16e4321c7fcf1eb0924c (
plain)
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
78
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*++
Module Name:
StackSampler.h
--*/
#ifndef __STACK_SAMPLER_H
#define __STACK_SAMPLER_H
#endif
#ifdef FEATURE_STACK_SAMPLING
class StackSampler
{
public:
// Interface
static void Init();
static void RecordJittingInfo(MethodDesc* pMD, CORJIT_FLAGS flags);
private:
// Methods
StackSampler();
~StackSampler();
static DWORD __stdcall SamplingThreadProc(void* arg);
static StackWalkAction StackWalkCallback(CrawlFrame* pCf, VOID* data);
StackWalkAction CrawlFrameVisitor(CrawlFrame* pCf, Thread* pMdThread);
void ThreadProc();
void JitFrequentMethodsInSamples();
void JitAndCollectTrace(MethodDesc* pMD);
void RecordJittingInfoInternal(MethodDesc* pMD, CORJIT_FLAGS flags);
// Constants
static const int s_knDefaultSamplingIntervalMsec = 100;
static const int s_knDefaultNumMethods = 32;
static const int s_knDefaultCountForImportance = 0; // TODO: Set to some reasonable value.
// Typedefs
struct CountInfo;
typedef MapSHash<MethodDesc*, CountInfo> CountInfoHash;
typedef CountInfoHash::element_t CountInfoHashEntry;
typedef MapSHash<MethodDesc*, CORJIT_FLAGS> JitInfoHash;
typedef JitInfoHash::element_t JitInfoHashEntry;
// Nested types
struct CountInfo
{
unsigned uCount;
bool fJitted;
CountInfo() : fJitted(false), uCount(0) {}
};
// Fields
Crst m_crstJitInfo;
CountInfoHash m_countInfo;
JitInfoHash m_jitInfo;
Thread* m_pThread;
unsigned m_nSampleEvery;
unsigned m_nSampleAfter;
unsigned m_nNumMethods;
};
#endif // FEATURE_STACK_SAMPLING
|
