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
|
//===- InputFiles.h ---------------------------------------------*- C++ -*-===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLD_WASM_INPUT_FILES_H
#define LLD_WASM_INPUT_FILES_H
#include "Symbols.h"
#include "lld/Common/LLVM.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/LTO/LTO.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/Wasm.h"
#include "llvm/Support/MemoryBuffer.h"
#include <vector>
using llvm::object::Archive;
using llvm::object::WasmObjectFile;
using llvm::object::WasmSection;
using llvm::object::WasmSymbol;
using llvm::wasm::WasmGlobal;
using llvm::wasm::WasmImport;
using llvm::wasm::WasmRelocation;
using llvm::wasm::WasmSignature;
namespace llvm {
namespace lto {
class InputFile;
}
} // namespace llvm
namespace lld {
namespace wasm {
class InputChunk;
class InputFunction;
class InputSegment;
class InputGlobal;
class InputSection;
class InputFile {
public:
enum Kind {
ObjectKind,
ArchiveKind,
BitcodeKind,
};
virtual ~InputFile() {}
// Returns the filename.
StringRef getName() const { return MB.getBufferIdentifier(); }
// Reads a file (the constructor doesn't do that).
virtual void parse() = 0;
Kind kind() const { return FileKind; }
// An archive file name if this file is created from an archive.
StringRef ArchiveName;
ArrayRef<Symbol *> getSymbols() const { return Symbols; }
protected:
InputFile(Kind K, MemoryBufferRef M) : MB(M), FileKind(K) {}
MemoryBufferRef MB;
// List of all symbols referenced or defined by this file.
std::vector<Symbol *> Symbols;
private:
const Kind FileKind;
};
// .a file (ar archive)
class ArchiveFile : public InputFile {
public:
explicit ArchiveFile(MemoryBufferRef M) : InputFile(ArchiveKind, M) {}
static bool classof(const InputFile *F) { return F->kind() == ArchiveKind; }
void addMember(const Archive::Symbol *Sym);
void parse() override;
private:
std::unique_ptr<Archive> File;
llvm::DenseSet<uint64_t> Seen;
};
// .o file (wasm object file)
class ObjFile : public InputFile {
public:
explicit ObjFile(MemoryBufferRef M) : InputFile(ObjectKind, M) {}
static bool classof(const InputFile *F) { return F->kind() == ObjectKind; }
void parse() override;
// Returns the underlying wasm file.
const WasmObjectFile *getWasmObj() const { return WasmObj.get(); }
void dumpInfo() const;
uint32_t calcNewIndex(const WasmRelocation &Reloc) const;
uint32_t calcNewValue(const WasmRelocation &Reloc) const;
uint32_t calcNewAddend(const WasmRelocation &Reloc) const;
uint32_t calcExpectedValue(const WasmRelocation &Reloc) const;
const WasmSection *CodeSection = nullptr;
const WasmSection *DataSection = nullptr;
// Maps input type indices to output type indices
std::vector<uint32_t> TypeMap;
std::vector<bool> TypeIsUsed;
// Maps function indices to table indices
std::vector<uint32_t> TableEntries;
std::vector<bool> UsedComdats;
std::vector<InputSegment *> Segments;
std::vector<InputFunction *> Functions;
std::vector<InputGlobal *> Globals;
std::vector<InputSection *> CustomSections;
llvm::DenseMap<uint32_t, InputSection *> CustomSectionsByIndex;
Symbol *getSymbol(uint32_t Index) const { return Symbols[Index]; }
FunctionSymbol *getFunctionSymbol(uint32_t Index) const;
DataSymbol *getDataSymbol(uint32_t Index) const;
GlobalSymbol *getGlobalSymbol(uint32_t Index) const;
SectionSymbol *getSectionSymbol(uint32_t Index) const;
private:
Symbol *createDefined(const WasmSymbol &Sym);
Symbol *createUndefined(const WasmSymbol &Sym);
bool isExcludedByComdat(InputChunk *Chunk) const;
std::unique_ptr<WasmObjectFile> WasmObj;
};
class BitcodeFile : public InputFile {
public:
explicit BitcodeFile(MemoryBufferRef M) : InputFile(BitcodeKind, M) {}
static bool classof(const InputFile *F) { return F->kind() == BitcodeKind; }
void parse() override;
std::unique_ptr<llvm::lto::InputFile> Obj;
};
// Will report a fatal() error if the input buffer is not a valid bitcode
// or was object file.
InputFile *createObjectFile(MemoryBufferRef MB);
// Opens a given file.
llvm::Optional<MemoryBufferRef> readFile(StringRef Path);
} // namespace wasm
std::string toString(const wasm::InputFile *File);
} // namespace lld
#endif
|
