Merge r298569: Force @{init,fini}_array if section name starts with ".{init,fini}_array.".

    this->Flags &= ~(SHF_MERGE | SHF_STRINGS);

}

// GNU assembler 2.24 and LLVM 4.0.0's MC (the newest release as of

// March 2017) fail to infer section types for sections starting with

// ".init_array." or ".fini_array.". They set SHT_PROGBITS instead of

// SHF_INIT_ARRAY. As a result, the following assembler directive

// creates ".init_array.100" with SHT_PROGBITS, for example.

//

//   .section .init_array.100, "aw"

//

// This function forces SHT_{INIT,FINI}_ARRAY so that we can handle

// incorrect inputs as if they were correct from the beginning.

static uint64_t getType(uint64_t Type, StringRef Name) {

  if (Type == SHT_PROGBITS && Name.startswith(".init_array."))

    return SHT_INIT_ARRAY;

  if (Type == SHT_PROGBITS && Name.startswith(".fini_array."))

    return SHT_FINI_ARRAY;

  return Type;

}

template <class ELFT>

InputSectionBase<ELFT>::InputSectionBase(elf::ObjectFile<ELFT> *File,

                                         const Elf_Shdr *Hdr, StringRef Name,

                                         Kind SectionKind)

    : InputSectionBase(File, Hdr->sh_flags & ~SHF_INFO_LINK, Hdr->sh_type,

                       Hdr->sh_entsize, Hdr->sh_link, Hdr->sh_info,

                       Hdr->sh_addralign, getSectionContents(File, Hdr), Name,

                       SectionKind) {

    : InputSectionBase(File, Hdr->sh_flags & ~SHF_INFO_LINK,

                       getType(Hdr->sh_type, Name), Hdr->sh_entsize,

                       Hdr->sh_link, Hdr->sh_info, Hdr->sh_addralign,

                       getSectionContents(File, Hdr), Name, SectionKind) {

  this->Offset = Hdr->sh_offset;

}

// REQUIRES: x86

// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t

// RUN: ld.lld %t -o %t.exe

// RUN: llvm-readobj -sections %t.exe | FileCheck %s

// CHECK:      Name: .init_array

// CHECK-NEXT: Type: SHT_INIT_ARRAY

// CHECK:      Name: .fini_array

// CHECK-NEXT: Type: SHT_FINI_ARRAY

.globl _start

_start:

  nop

.section .init_array.100, "aw", @progbits

  .byte 0

.section .fini_array.100, "aw", @progbits

  .byte 0