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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
// 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.
//
// Hash table associated with each module that records for all types defined in that module the mapping
// between type name and token (or TypeHandle).
//
#ifndef __TYPEEQUIVALENCE_HASH_INCLUDED
#define __TYPEEQUIVALENCE_HASH_INCLUDED
#include "ngenhash.h"
#ifdef FEATURE_TYPEEQUIVALENCE
// The type of each entry in the hash.
typedef DPTR(struct TypeEquivalenceEntry) PTR_TypeEquivalenceEntry;
typedef struct TypeEquivalenceEntry
{
static NgenHashValue HashTypeHandles(TypeHandle thA, TypeHandle thB)
{
LIMITED_METHOD_CONTRACT;
UINT_PTR aPtr = thA.AsTAddr();
UINT_PTR bPtr = thB.AsTAddr();
DWORD hash = (DWORD)((aPtr + bPtr) >> 3);
return hash;
}
bool Match(TypeHandle thA, TypeHandle thB)
{
LIMITED_METHOD_CONTRACT;
return (((thA == m_thA) && (thB == m_thB)) ||
((thB == m_thA) && (thA == m_thB)));
}
void SetData(TypeHandle thA, TypeHandle thB, bool fEquivalent)
{
LIMITED_METHOD_CONTRACT;
m_thA = thA;
m_thB = thB;
m_fEquivalent = fEquivalent;
}
bool GetEquivalence()
{
LIMITED_METHOD_CONTRACT;
return m_fEquivalent;
}
private:
TypeHandle m_thA;
TypeHandle m_thB;
bool m_fEquivalent;
} TypeEquivalenceEntry_t;
// The hash type itself. All common logic is provided by the NgenHashTable templated base class. See
// NgenHash.h for details.
typedef DPTR(class TypeEquivalenceHashTable) PTR_TypeEquivalenceHashTable;
class TypeEquivalenceHashTable : public NgenHashTable<TypeEquivalenceHashTable, TypeEquivalenceEntry, 4>
{
friend class NgenHashTable<TypeEquivalenceHashTable, TypeEquivalenceEntry, 4>;
#ifdef DACCESS_COMPILE
friend class NativeImageDumper;
#endif
public:
typedef enum EquivalenceMatch
{
MatchUnknown,
Match,
NoMatch
};
// The LookupContext type we export to track GetValue/FindNextNestedClass enumerations is simply a rename
// of the base classes' hash value enumerator.
typedef NgenHashTable<TypeEquivalenceHashTable, TypeEquivalenceEntry, 4>::LookupContext LookupContext;
#ifndef DACCESS_COMPILE
static TypeEquivalenceHashTable *Create(AppDomain *pDomain, DWORD dwNumBuckets, CrstExplicitInit *pCrst);
void RecordEquivalence(TypeHandle thA, TypeHandle thB, EquivalenceMatch match);
#endif
EquivalenceMatch CheckEquivalence(TypeHandle thA, TypeHandle thB);
#ifdef DACCESS_COMPILE
void EnumMemoryRegionsForEntry(TypeEquivalenceEntry_t *pEntry, CLRDataEnumMemoryFlags flags) { return; }
#endif
#if defined(FEATURE_PREJIT) && !defined(DACCESS_COMPILE)
private:
bool ShouldSave(DataImage *pImage, TypeEquivalenceEntry_t *pEntry) { return false; }
bool IsHotEntry(TypeEquivalenceEntry_t *pEntry, CorProfileData *pProfileData) { return false; }
bool SaveEntry(DataImage *pImage, CorProfileData *pProfileData, TypeEquivalenceEntry_t *pOldEntry, TypeEquivalenceEntry_t *pNewEntry, EntryMappingTable *pMap) { return true; }
void FixupEntry(DataImage *pImage, TypeEquivalenceEntry_t *pEntry, void *pFixupBase, DWORD cbFixupOffset) { return; }
#endif // FEATURE_PREJIT && !DACCESS_COMPILE
private:
#ifndef DACCESS_COMPILE
TypeEquivalenceHashTable(LoaderHeap *pHeap, DWORD cInitialBuckets, CrstExplicitInit *pCrst) :
NgenHashTable<TypeEquivalenceHashTable, TypeEquivalenceEntry, 4>(NULL, pHeap, cInitialBuckets),
m_pHashTableCrst(pCrst)
{
}
#endif
CrstExplicitInit* m_pHashTableCrst;
};
#endif // FEATURE_TYPEEQUIVALENCE
#endif // !__CLASS_HASH_INCLUDED
|