SymbolTable.h
1.82 KB
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
//===- SymbolTable.h --------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLD_MACHO_SYMBOL_TABLE_H
#define LLD_MACHO_SYMBOL_TABLE_H
#include "lld/Common/LLVM.h"
#include "llvm/ADT/CachedHashString.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Object/Archive.h"
namespace lld {
namespace macho {
class ArchiveFile;
class DylibFile;
class InputFile;
class InputSection;
class MachHeaderSection;
class Symbol;
/*
* Note that the SymbolTable handles name collisions by calling
* replaceSymbol(), which does an in-place update of the Symbol via `placement
* new`. Therefore, there is no need to update any relocations that hold
* pointers the "old" Symbol -- they will automatically point to the new one.
*/
class SymbolTable {
public:
Symbol *addDefined(StringRef name, InputSection *isec, uint32_t value,
bool isWeakDef);
Symbol *addUndefined(StringRef name);
Symbol *addCommon(StringRef name, InputFile *, uint64_t size, uint32_t align);
Symbol *addDylib(StringRef name, DylibFile *file, bool isWeakDef, bool isTlv);
Symbol *addLazy(StringRef name, ArchiveFile *file,
const llvm::object::Archive::Symbol &sym);
Symbol *addDSOHandle(const MachHeaderSection *);
ArrayRef<Symbol *> getSymbols() const { return symVector; }
Symbol *find(StringRef name);
private:
std::pair<Symbol *, bool> insert(StringRef name);
llvm::DenseMap<llvm::CachedHashStringRef, int> symMap;
std::vector<Symbol *> symVector;
};
extern SymbolTable *symtab;
} // namespace macho
} // namespace lld
#endif