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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
//=- Deserialize.h - Generic Object Deserialization from Bitcode --*- C++ -*-=//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Ted Kremenek and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the interface for generic object deserialization from
// LLVM bitcode.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_BITCODE_SERIALIZE_INPUT
#define LLVM_BITCODE_SERIALIZE_INPUT
#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/Bitcode/Serialization.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/DataTypes.h"
#include <vector>
namespace llvm {
class Deserializer {
//===----------------------------------------------------------===//
// Internal type definitions.
//===----------------------------------------------------------===//
struct PtrIdInfo {
static inline unsigned getEmptyKey() { return ~((unsigned) 0x0); }
static inline unsigned getTombstoneKey() { return getEmptyKey()-1; }
static inline unsigned getHashValue(unsigned X) { return X; }
static inline bool isEqual(unsigned X, unsigned Y) { return X == Y; }
static inline bool isPod() { return true; }
};
struct BPNode {
BPNode* Next;
uintptr_t& PtrRef;
BPNode(BPNode* n, uintptr_t& pref)
: Next(n), PtrRef(pref) {
PtrRef = 0;
}
};
class BPatchEntry {
uintptr_t Ptr;
public:
BPatchEntry() : Ptr(0x1) {}
BPatchEntry(void* P) : Ptr(reinterpret_cast<uintptr_t>(P)) {}
bool hasFinalPtr() const { return Ptr & 0x1 ? false : true; }
void setFinalPtr(BPNode*& FreeList, const void* P);
BPNode* getBPNode() const {
assert (!hasFinalPtr());
return reinterpret_cast<BPNode*>(Ptr & ~0x1);
}
void setBPNode(BPNode* N) {
assert (!hasFinalPtr());
Ptr = reinterpret_cast<uintptr_t>(N) | 0x1;
}
uintptr_t getFinalPtr() const {
assert (!(Ptr & 0x1) && "Backpatch pointer not yet deserialized.");
return Ptr;
}
static inline bool isPod() { return true; }
};
typedef llvm::DenseMap<unsigned,BPatchEntry,PtrIdInfo,BPatchEntry> MapTy;
//===----------------------------------------------------------===//
// Internal data members.
//===----------------------------------------------------------===//
BitstreamReader& Stream;
SmallVector<uint64_t,10> Record;
unsigned RecIdx;
BumpPtrAllocator Allocator;
BPNode* FreeList;
MapTy BPatchMap;
//===----------------------------------------------------------===//
// Public Interface.
//===----------------------------------------------------------===//
public:
Deserializer(BitstreamReader& stream);
~Deserializer();
uint64_t ReadInt();
bool ReadBool() {
return ReadInt() ? true : false;
}
template <typename T>
inline T& Read(T& X) {
SerializeTrait<T>::Read(*this,X);
return X;
}
template <typename T>
inline T ReadVal() {
return SerializeTrait<T>::ReadVal(*this);
}
template <typename T>
inline T* Materialize() {
return SerializeTrait<T>::Materialize(*this);
}
char* ReadCStr(char* cstr = NULL, unsigned MaxLen=0, bool isNullTerm=true);
void ReadCStr(std::vector<char>& buff, bool isNullTerm=false);
template <typename T>
inline T* ReadOwnedPtr() {
unsigned PtrId = ReadInt();
if (PtrId == 0)
return NULL;
T* x = SerializeTrait<T>::Materialize(*this);
RegisterPtr(PtrId,x);
return x;
}
template <typename T>
void ReadPtr(T*& PtrRef) {
ReadUIntPtr(reinterpret_cast<uintptr_t&>(PtrRef));
}
template <typename T>
void ReadPtr(const T*& PtrRef) {
ReadPtr(const_cast<T*&>(PtrRef));
}
void ReadUIntPtr(uintptr_t& PtrRef);
template <typename T>
T& ReadRef() {
T* p = reinterpret_cast<T*>(ReadInternalRefPtr());
return *p;
}
void RegisterPtr(unsigned PtrId, const void* Ptr);
void RegisterPtr(const void* Ptr) {
RegisterPtr(ReadInt(),Ptr);
}
private:
void ReadRecord();
bool inRecord();
uintptr_t ReadInternalRefPtr();
};
} // end namespace llvm
#endif
|
