/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/MC/MCSectionELF.h
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1 | | //===- MCSectionELF.h - ELF Machine Code Sections ---------------*- 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 file declares the MCSectionELF class. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #ifndef LLVM_MC_MCSECTIONELF_H |
14 | | #define LLVM_MC_MCSECTIONELF_H |
15 | | |
16 | | #include "llvm/ADT/StringRef.h" |
17 | | #include "llvm/MC/MCSection.h" |
18 | | #include "llvm/MC/MCSymbolELF.h" |
19 | | #include "llvm/MC/SectionKind.h" |
20 | | |
21 | | namespace llvm { |
22 | | |
23 | | class MCSymbol; |
24 | | |
25 | | /// This represents a section on linux, lots of unix variants and some bare |
26 | | /// metal systems. |
27 | | class MCSectionELF final : public MCSection { |
28 | | /// This is the name of the section. The referenced memory is owned by |
29 | | /// TargetLoweringObjectFileELF's ELFUniqueMap. |
30 | | StringRef SectionName; |
31 | | |
32 | | /// This is the sh_type field of a section, drawn from the enums below. |
33 | | unsigned Type; |
34 | | |
35 | | /// This is the sh_flags field of a section, drawn from the enums below. |
36 | | unsigned Flags; |
37 | | |
38 | | unsigned UniqueID; |
39 | | |
40 | | /// The size of each entry in this section. This size only makes sense for |
41 | | /// sections that contain fixed-sized entries. If a section does not contain |
42 | | /// fixed-sized entries 'EntrySize' will be 0. |
43 | | unsigned EntrySize; |
44 | | |
45 | | const MCSymbolELF *Group; |
46 | | |
47 | | /// sh_info for SHF_LINK_ORDER (can be null). |
48 | | const MCSymbol *AssociatedSymbol; |
49 | | |
50 | | private: |
51 | | friend class MCContext; |
52 | | |
53 | | MCSectionELF(StringRef Section, unsigned type, unsigned flags, SectionKind K, |
54 | | unsigned entrySize, const MCSymbolELF *group, unsigned UniqueID, |
55 | | MCSymbol *Begin, const MCSymbolELF *AssociatedSymbol) |
56 | | : MCSection(SV_ELF, K, Begin), SectionName(Section), Type(type), |
57 | | Flags(flags), UniqueID(UniqueID), EntrySize(entrySize), Group(group), |
58 | 2.16M | AssociatedSymbol(AssociatedSymbol) { |
59 | 2.16M | if (Group) |
60 | 640 | Group->setIsSignature(); |
61 | 2.16M | } |
62 | | |
63 | 7 | void setSectionName(StringRef Name) { SectionName = Name; } |
64 | | |
65 | | public: |
66 | | /// Decides whether a '.section' directive should be printed before the |
67 | | /// section name |
68 | | bool ShouldOmitSectionDirective(StringRef Name, const MCAsmInfo &MAI) const; |
69 | | |
70 | 1.67M | StringRef getSectionName() const { return SectionName; } |
71 | 2.93M | unsigned getType() const { return Type; } |
72 | 1.16M | unsigned getFlags() const { return Flags; } |
73 | 497k | unsigned getEntrySize() const { return EntrySize; } |
74 | 6 | void setFlags(unsigned F) { Flags = F; } |
75 | 972k | const MCSymbolELF *getGroup() const { return Group; } |
76 | | |
77 | | void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T, |
78 | | raw_ostream &OS, |
79 | | const MCExpr *Subsection) const override; |
80 | | bool UseCodeAlign() const override; |
81 | | bool isVirtualSection() const override; |
82 | | |
83 | 240k | bool isUnique() const { return UniqueID != ~0U; } |
84 | 827 | unsigned getUniqueID() const { return UniqueID; } |
85 | | |
86 | 8.89k | const MCSection *getAssociatedSection() const { return &AssociatedSymbol->getSection(); } |
87 | 245 | const MCSymbol *getAssociatedSymbol() const { return AssociatedSymbol; } |
88 | | |
89 | 193 | static bool classof(const MCSection *S) { |
90 | 193 | return S->getVariant() == SV_ELF; |
91 | 193 | } |
92 | | }; |
93 | | |
94 | | } // end namespace llvm |
95 | | |
96 | | #endif // LLVM_MC_MCSECTIONELF_H |