1 | //===- ModuleSymbolTable.h - symbol table for in-memory IR ------*- C++ -*-===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | // |
9 | // This class represents a symbol table built from in-memory IR. It provides |
10 | // access to GlobalValues and should only be used if such access is required |
11 | // (e.g. in the LTO implementation). |
12 | // |
13 | //===----------------------------------------------------------------------===// |
14 | |
15 | #ifndef LLVM_OBJECT_MODULESYMBOLTABLE_H |
16 | #define LLVM_OBJECT_MODULESYMBOLTABLE_H |
17 | |
18 | #include "llvm/ADT/ArrayRef.h" |
19 | #include "llvm/ADT/PointerUnion.h" |
20 | #include "llvm/IR/Mangler.h" |
21 | #include "llvm/Object/SymbolicFile.h" |
22 | #include "llvm/Support/Allocator.h" |
23 | #include <cstdint> |
24 | #include <string> |
25 | #include <utility> |
26 | #include <vector> |
27 | |
28 | namespace llvm { |
29 | |
30 | class GlobalValue; |
31 | class Module; |
32 | |
33 | class ModuleSymbolTable { |
34 | public: |
35 | using AsmSymbol = std::pair<std::string, uint32_t>; |
36 | using Symbol = PointerUnion<GlobalValue *, AsmSymbol *>; |
37 | |
38 | private: |
39 | Module *FirstMod = nullptr; |
40 | |
41 | SpecificBumpPtrAllocator<AsmSymbol> AsmSymbols; |
42 | std::vector<Symbol> SymTab; |
43 | Mangler Mang; |
44 | |
45 | public: |
46 | ArrayRef<Symbol> symbols() const { return SymTab; } |
47 | void addModule(Module *M); |
48 | |
49 | void printSymbolName(raw_ostream &OS, Symbol S) const; |
50 | uint32_t getSymbolFlags(Symbol S) const; |
51 | |
52 | /// Parse inline ASM and collect the symbols that are defined or referenced in |
53 | /// the current module. |
54 | /// |
55 | /// For each found symbol, call \p AsmSymbol with the name of the symbol found |
56 | /// and the associated flags. |
57 | static void CollectAsmSymbols( |
58 | const Module &M, |
59 | function_ref<void(StringRef, object::BasicSymbolRef::Flags)> AsmSymbol); |
60 | |
61 | /// Parse inline ASM and collect the symvers directives that are defined in |
62 | /// the current module. |
63 | /// |
64 | /// For each found symbol, call \p AsmSymver with the name of the symbol and |
65 | /// its alias. |
66 | static void |
67 | CollectAsmSymvers(const Module &M, |
68 | function_ref<void(StringRef, StringRef)> AsmSymver); |
69 | }; |
70 | |
71 | } // end namespace llvm |
72 | |
73 | #endif // LLVM_OBJECT_MODULESYMBOLTABLE_H |
74 | |