Coverage Report

Created: 2018-11-16 02:38

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/MC/MCSectionMachO.h
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//===- MCSectionMachO.h - MachO Machine Code Sections -----------*- C++ -*-===//
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//
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//                     The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the MCSectionMachO class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCSECTIONMACHO_H
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#define LLVM_MC_MCSECTIONMACHO_H
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/MachO.h"
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#include "llvm/MC/MCSection.h"
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namespace llvm {
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/// This represents a section on a Mach-O system (used by Mac OS X).  On a Mac
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/// system, these are also described in /usr/include/mach-o/loader.h.
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class MCSectionMachO final : public MCSection {
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  char SegmentName[16];  // Not necessarily null terminated!
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  char SectionName[16];  // Not necessarily null terminated!
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  /// This is the SECTION_TYPE and SECTION_ATTRIBUTES field of a section, drawn
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  /// from the enums below.
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  unsigned TypeAndAttributes;
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  /// The 'reserved2' field of a section, used to represent the size of stubs,
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  /// for example.
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  unsigned Reserved2;
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  MCSectionMachO(StringRef Segment, StringRef Section, unsigned TAA,
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                 unsigned reserved2, SectionKind K, MCSymbol *Begin);
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  friend class MCContext;
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public:
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  StringRef getSegmentName() const {
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    // SegmentName is not necessarily null terminated!
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    if (SegmentName[15])
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      return StringRef(SegmentName, 16);
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    return StringRef(SegmentName);
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  }
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  StringRef getSectionName() const {
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    // SectionName is not necessarily null terminated!
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    if (SectionName[15])
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      return StringRef(SectionName, 16);
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    return StringRef(SectionName);
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  }
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  unsigned getTypeAndAttributes() const { return TypeAndAttributes; }
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  unsigned getStubSize() const { return Reserved2; }
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  MachO::SectionType getType() const {
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    return static_cast<MachO::SectionType>(TypeAndAttributes &
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                                           MachO::SECTION_TYPE);
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  }
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  bool hasAttribute(unsigned Value) const {
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    return (TypeAndAttributes & Value) != 0;
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  }
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  /// Parse the section specifier indicated by "Spec". This is a string that can
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  /// appear after a .section directive in a mach-o flavored .s file.  If
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  /// successful, this fills in the specified Out parameters and returns an
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  /// empty string.  When an invalid section specifier is present, this returns
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  /// a string indicating the problem. If no TAA was parsed, TAA is not altered,
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  /// and TAAWasSet becomes false.
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  static std::string ParseSectionSpecifier(StringRef Spec,       // In.
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                                           StringRef &Segment,   // Out.
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                                           StringRef &Section,   // Out.
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                                           unsigned  &TAA,       // Out.
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                                           bool      &TAAParsed, // Out.
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                                           unsigned  &StubSize); // Out.
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  void PrintSwitchToSection(const MCAsmInfo &MAI, const Triple &T,
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                            raw_ostream &OS,
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                            const MCExpr *Subsection) const override;
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  bool UseCodeAlign() const override;
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  bool isVirtualSection() const override;
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  static bool classof(const MCSection *S) {
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    return S->getVariant() == SV_MachO;
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  }
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};
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} // end namespace llvm
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#endif