/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp

Bug Summary

File:	tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp
Warning:	line 163, column 1 Potential memory leak
Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ObjectFileELF.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -mrelocation-model pic -pic-level 2 -mthread-model posix -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-8/lib/clang/8.0.0 -D HAVE_ROUND -D LLDB_CONFIGURATION_RELEASE -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/tools/lldb/source/Plugins/ObjectFile/ELF -I /build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF -I /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/tools/lldb/include -I /build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/include -I /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/include -I /build/llvm-toolchain-snapshot-8~svn345461/include -I /usr/include/python2.7 -I /build/llvm-toolchain-snapshot-8~svn345461/tools/clang/include -I /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/tools/lldb/../clang/include -I /build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/. -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/include/clang/8.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-8/lib/clang/8.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -Wno-deprecated-declarations -Wno-unknown-pragmas -Wno-strict-aliasing -Wno-deprecated-register -Wno-vla-extension -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-8~svn345461/build-llvm/tools/lldb/source/Plugins/ObjectFile/ELF -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -fobjc-runtime=gcc -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-10-27-211344-32123-1 -x c++ /build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp -faddrsig
1//===-- ObjectFileELF.cpp ------------------------------------- -*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//

10#include "ObjectFileELF.h"

12#include <algorithm>
13#include <cassert>
14#include <unordered_map>

16#include "lldb/Core/FileSpecList.h"
17#include "lldb/Core/Module.h"
18#include "lldb/Core/ModuleSpec.h"
19#include "lldb/Core/PluginManager.h"
20#include "lldb/Core/Section.h"
21#include "lldb/Symbol/DWARFCallFrameInfo.h"
22#include "lldb/Symbol/SymbolContext.h"
23#include "lldb/Target/SectionLoadList.h"
24#include "lldb/Target/Target.h"
25#include "lldb/Utility/ArchSpec.h"
26#include "lldb/Utility/DataBufferHeap.h"
27#include "lldb/Utility/Log.h"
28#include "lldb/Utility/Status.h"
29#include "lldb/Utility/Stream.h"
30#include "lldb/Utility/Timer.h"

32#include "llvm/ADT/PointerUnion.h"
33#include "llvm/ADT/StringRef.h"
34#include "llvm/Object/Decompressor.h"
35#include "llvm/Support/ARMBuildAttributes.h"
36#include "llvm/Support/MathExtras.h"
37#include "llvm/Support/MemoryBuffer.h"
38#include "llvm/Support/MipsABIFlags.h"

40#define CASE_AND_STREAM(s, def, width)case def: s->Printf("%-*s", width, "def"); break;                                         \
case def:                                                                    \
  s->Printf("%-*s", width, #def);                                            \
  break;

45using namespace lldb;
46using namespace lldb_private;
47using namespace elf;
48using namespace llvm::ELF;

50namespace {

52// ELF note owner definitions
53const char *const LLDB_NT_OWNER_FREEBSD = "FreeBSD";
54const char *const LLDB_NT_OWNER_GNU = "GNU";
55const char *const LLDB_NT_OWNER_NETBSD = "NetBSD";
56const char *const LLDB_NT_OWNER_OPENBSD = "OpenBSD";
57const char *const LLDB_NT_OWNER_CSR = "csr";
58const char *const LLDB_NT_OWNER_ANDROID = "Android";
59const char *const LLDB_NT_OWNER_CORE = "CORE";
60const char *const LLDB_NT_OWNER_LINUX = "LINUX";

62// ELF note type definitions
63const elf_word LLDB_NT_FREEBSD_ABI_TAG = 0x01;
64const elf_word LLDB_NT_FREEBSD_ABI_SIZE = 4;

66const elf_word LLDB_NT_GNU_ABI_TAG = 0x01;
67const elf_word LLDB_NT_GNU_ABI_SIZE = 16;

69const elf_word LLDB_NT_GNU_BUILD_ID_TAG = 0x03;

71const elf_word LLDB_NT_NETBSD_ABI_TAG = 0x01;
72const elf_word LLDB_NT_NETBSD_ABI_SIZE = 4;

74// GNU ABI note OS constants
75const elf_word LLDB_NT_GNU_ABI_OS_LINUX = 0x00;
76const elf_word LLDB_NT_GNU_ABI_OS_HURD = 0x01;
77const elf_word LLDB_NT_GNU_ABI_OS_SOLARIS = 0x02;

79// LLDB_NT_OWNER_CORE and LLDB_NT_OWNER_LINUX note contants
80#define NT_PRSTATUS1 1
81#define NT_PRFPREG2 2
82#define NT_PRPSINFO3 3
83#define NT_TASKSTRUCT4 4
84#define NT_AUXV6 6
85#define NT_SIGINFO0x53494749 0x53494749
86#define NT_FILE0x46494c45 0x46494c45
87#define NT_PRXFPREG0x46e62b7f 0x46e62b7f
88#define NT_PPC_VMX0x100 0x100
89#define NT_PPC_SPE0x101 0x101
90#define NT_PPC_VSX0x102 0x102
91#define NT_386_TLS0x200 0x200
92#define NT_386_IOPERM0x201 0x201
93#define NT_X86_XSTATE0x202 0x202
94#define NT_S390_HIGH_GPRS0x300 0x300
95#define NT_S390_TIMER0x301 0x301
96#define NT_S390_TODCMP0x302 0x302
97#define NT_S390_TODPREG0x303 0x303
98#define NT_S390_CTRS0x304 0x304
99#define NT_S390_PREFIX0x305 0x305
100#define NT_S390_LAST_BREAK0x306 0x306
101#define NT_S390_SYSTEM_CALL0x307 0x307
102#define NT_S390_TDB0x308 0x308
103#define NT_S390_VXRS_LOW0x309 0x309
104#define NT_S390_VXRS_HIGH0x30a 0x30a
105#define NT_ARM_VFP0x400 0x400
106#define NT_ARM_TLS0x401 0x401
107#define NT_ARM_HW_BREAK0x402 0x402
108#define NT_ARM_HW_WATCH0x403 0x403
109#define NT_ARM_SYSTEM_CALL0x404 0x404
110#define NT_METAG_CBUF0x500 0x500
111#define NT_METAG_RPIPE0x501 0x501
112#define NT_METAG_TLS0x502 0x502

114//===----------------------------------------------------------------------===//
115/// @class ELFRelocation
116/// Generic wrapper for ELFRel and ELFRela.
117///
118/// This helper class allows us to parse both ELFRel and ELFRela relocation
119/// entries in a generic manner.
120class ELFRelocation {
121public:
/// Constructs an ELFRelocation entry with a personality as given by @p
/// type.
///
/// @param type Either DT_REL or DT_RELA.  Any other value is invalid.
ELFRelocation(unsigned type);

~ELFRelocation();

bool Parse(const lldb_private::DataExtractor &data, lldb::offset_t *offset);

static unsigned RelocType32(const ELFRelocation &rel);

static unsigned RelocType64(const ELFRelocation &rel);

static unsigned RelocSymbol32(const ELFRelocation &rel);

static unsigned RelocSymbol64(const ELFRelocation &rel);

static unsigned RelocOffset32(const ELFRelocation &rel);

static unsigned RelocOffset64(const ELFRelocation &rel);

static unsigned RelocAddend32(const ELFRelocation &rel);

static unsigned RelocAddend64(const ELFRelocation &rel);

148private:
typedef llvm::PointerUnion<ELFRel *, ELFRela *> RelocUnion;

RelocUnion reloc;
152};

154ELFRelocation::ELFRelocation(unsigned type) {
if (type == DT_REL || type == SHT_REL)
27
←
Taking true branch→
  reloc = new ELFRel();
28
←
Memory is allocated→
else if (type == DT_RELA || type == SHT_RELA)
  reloc = new ELFRela();
else {
  assert(false && "unexpected relocation type")((false && "unexpected relocation type") ? static_cast
<void> (0) : __assert_fail ("false && \"unexpected relocation type\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 160, __PRETTY_FUNCTION__));
  reloc = static_cast<ELFRel *>(NULL__null);
}
163}
29
←
Potential memory leak

165ELFRelocation::~ELFRelocation() {
if (reloc.is<ELFRel *>())
  delete reloc.get<ELFRel *>();
else
  delete reloc.get<ELFRela *>();
170}

172bool ELFRelocation::Parse(const lldb_private::DataExtractor &data,
                        lldb::offset_t *offset) {
if (reloc.is<ELFRel *>())
  return reloc.get<ELFRel *>()->Parse(data, offset);
else
  return reloc.get<ELFRela *>()->Parse(data, offset);
178}

180unsigned ELFRelocation::RelocType32(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return ELFRel::RelocType32(*rel.reloc.get<ELFRel *>());
else
  return ELFRela::RelocType32(*rel.reloc.get<ELFRela *>());
185}

187unsigned ELFRelocation::RelocType64(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return ELFRel::RelocType64(*rel.reloc.get<ELFRel *>());
else
  return ELFRela::RelocType64(*rel.reloc.get<ELFRela *>());
192}

194unsigned ELFRelocation::RelocSymbol32(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return ELFRel::RelocSymbol32(*rel.reloc.get<ELFRel *>());
else
  return ELFRela::RelocSymbol32(*rel.reloc.get<ELFRela *>());
199}

201unsigned ELFRelocation::RelocSymbol64(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return ELFRel::RelocSymbol64(*rel.reloc.get<ELFRel *>());
else
  return ELFRela::RelocSymbol64(*rel.reloc.get<ELFRela *>());
206}

208unsigned ELFRelocation::RelocOffset32(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return rel.reloc.get<ELFRel *>()->r_offset;
else
  return rel.reloc.get<ELFRela *>()->r_offset;
213}

215unsigned ELFRelocation::RelocOffset64(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return rel.reloc.get<ELFRel *>()->r_offset;
else
  return rel.reloc.get<ELFRela *>()->r_offset;
220}

222unsigned ELFRelocation::RelocAddend32(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return 0;
else
  return rel.reloc.get<ELFRela *>()->r_addend;
227}

229unsigned ELFRelocation::RelocAddend64(const ELFRelocation &rel) {
if (rel.reloc.is<ELFRel *>())
  return 0;
else
  return rel.reloc.get<ELFRela *>()->r_addend;
234}

236} // end anonymous namespace

238bool ELFNote::Parse(const DataExtractor &data, lldb::offset_t *offset) {
// Read all fields.
if (data.GetU32(offset, &n_namesz, 3) == NULL__null)
  return false;

// The name field is required to be nul-terminated, and n_namesz includes the
// terminating nul in observed implementations (contrary to the ELF-64 spec).
// A special case is needed for cores generated by some older Linux versions,
// which write a note named "CORE" without a nul terminator and n_namesz = 4.
if (n_namesz == 4) {
  char buf[4];
  if (data.ExtractBytes(*offset, 4, data.GetByteOrder(), buf) != 4)
    return false;
  if (strncmp(buf, "CORE", 4) == 0) {
    n_name = "CORE";
    *offset += 4;
    return true;
  }
}

const char *cstr = data.GetCStr(offset, llvm::alignTo(n_namesz, 4));
if (cstr == NULL__null) {
  Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_SYMBOLS(1u << 20)));
  if (log)
    log->Printf("Failed to parse note name lacking nul terminator");

  return false;
}
n_name = cstr;
return true;
268}

270static uint32_t kalimbaVariantFromElfFlags(const elf::elf_word e_flags) {
const uint32_t dsp_rev = e_flags & 0xFF;
uint32_t kal_arch_variant = LLDB_INVALID_CPUTYPE(0xFFFFFFFEu);
switch (dsp_rev) {
// TODO(mg11) Support more variants
case 10:
  kal_arch_variant = llvm::Triple::KalimbaSubArch_v3;
  break;
case 14:
  kal_arch_variant = llvm::Triple::KalimbaSubArch_v4;
  break;
case 17:
case 20:
  kal_arch_variant = llvm::Triple::KalimbaSubArch_v5;
  break;
default:
  break;
}
return kal_arch_variant;
289}

291static uint32_t mipsVariantFromElfFlags (const elf::ELFHeader &header) {
const uint32_t mips_arch = header.e_flags & llvm::ELF::EF_MIPS_ARCH;
uint32_t endian = header.e_ident[EI_DATA];
uint32_t arch_variant = ArchSpec::eMIPSSubType_unknown;
uint32_t fileclass = header.e_ident[EI_CLASS];

// If there aren't any elf flags available (e.g core elf file) then return
// default
// 32 or 64 bit arch (without any architecture revision) based on object file's class.
if (header.e_type == ET_CORE) {
  switch (fileclass) {
  case llvm::ELF::ELFCLASS32:
    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32el
                                   : ArchSpec::eMIPSSubType_mips32;
  case llvm::ELF::ELFCLASS64:
    return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64el
                                   : ArchSpec::eMIPSSubType_mips64;
  default:
    return arch_variant;
  }
}

switch (mips_arch) {
case llvm::ELF::EF_MIPS_ARCH_1:
case llvm::ELF::EF_MIPS_ARCH_2:
case llvm::ELF::EF_MIPS_ARCH_32:
  return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32el
                                 : ArchSpec::eMIPSSubType_mips32;
case llvm::ELF::EF_MIPS_ARCH_32R2:
  return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32r2el
                                 : ArchSpec::eMIPSSubType_mips32r2;
case llvm::ELF::EF_MIPS_ARCH_32R6:
  return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips32r6el
                                 : ArchSpec::eMIPSSubType_mips32r6;
case llvm::ELF::EF_MIPS_ARCH_3:
case llvm::ELF::EF_MIPS_ARCH_4:
case llvm::ELF::EF_MIPS_ARCH_5:
case llvm::ELF::EF_MIPS_ARCH_64:
  return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64el
                                 : ArchSpec::eMIPSSubType_mips64;
case llvm::ELF::EF_MIPS_ARCH_64R2:
  return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64r2el
                                 : ArchSpec::eMIPSSubType_mips64r2;
case llvm::ELF::EF_MIPS_ARCH_64R6:
  return (endian == ELFDATA2LSB) ? ArchSpec::eMIPSSubType_mips64r6el
                                 : ArchSpec::eMIPSSubType_mips64r6;
default:
  break;
}

return arch_variant;
342}

344static uint32_t subTypeFromElfHeader(const elf::ELFHeader &header) {
if (header.e_machine == llvm::ELF::EM_MIPS)
  return mipsVariantFromElfFlags(header);

return llvm::ELF::EM_CSR_KALIMBA == header.e_machine
           ? kalimbaVariantFromElfFlags(header.e_flags)
           : LLDB_INVALID_CPUTYPE(0xFFFFFFFEu);
351}

353//! The kalimba toolchain identifies a code section as being
354//! one with the SHT_PROGBITS set in the section sh_type and the top
355//! bit in the 32-bit address field set.
356static lldb::SectionType
357kalimbaSectionType(const elf::ELFHeader &header,
                 const elf::ELFSectionHeader &sect_hdr) {
if (llvm::ELF::EM_CSR_KALIMBA != header.e_machine) {
  return eSectionTypeOther;
}

if (llvm::ELF::SHT_NOBITS == sect_hdr.sh_type) {
  return eSectionTypeZeroFill;
}

if (llvm::ELF::SHT_PROGBITS == sect_hdr.sh_type) {
  const lldb::addr_t KAL_CODE_BIT = 1 << 31;
  return KAL_CODE_BIT & sect_hdr.sh_addr ? eSectionTypeCode
                                         : eSectionTypeData;
}

return eSectionTypeOther;
374}

376// Arbitrary constant used as UUID prefix for core files.
377const uint32_t ObjectFileELF::g_core_uuid_magic(0xE210C);

379//------------------------------------------------------------------
380// Static methods.
381//------------------------------------------------------------------
382void ObjectFileELF::Initialize() {
PluginManager::RegisterPlugin(GetPluginNameStatic(),
                              GetPluginDescriptionStatic(), CreateInstance,
                              CreateMemoryInstance, GetModuleSpecifications);
386}

388void ObjectFileELF::Terminate() {
PluginManager::UnregisterPlugin(CreateInstance);
390}

392lldb_private::ConstString ObjectFileELF::GetPluginNameStatic() {
static ConstString g_name("elf");
return g_name;
395}

397const char *ObjectFileELF::GetPluginDescriptionStatic() {
return "ELF object file reader.";
399}

401ObjectFile *ObjectFileELF::CreateInstance(const lldb::ModuleSP &module_sp,
                                        DataBufferSP &data_sp,
                                        lldb::offset_t data_offset,
                                        const lldb_private::FileSpec *file,
                                        lldb::offset_t file_offset,
                                        lldb::offset_t length) {
if (!data_sp) {
  data_sp = MapFileData(*file, length, file_offset);
  if (!data_sp)
    return nullptr;
  data_offset = 0;
}

assert(data_sp)((data_sp) ? static_cast<void> (0) : __assert_fail ("data_sp"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 414, __PRETTY_FUNCTION__));

if (data_sp->GetByteSize() <= (llvm::ELF::EI_NIDENT + data_offset))
  return nullptr;

const uint8_t *magic = data_sp->GetBytes() + data_offset;
if (!ELFHeader::MagicBytesMatch(magic))
  return nullptr;

// Update the data to contain the entire file if it doesn't already
if (data_sp->GetByteSize() < length) {
  data_sp = MapFileData(*file, length, file_offset);
  if (!data_sp)
    return nullptr;
  data_offset = 0;
  magic = data_sp->GetBytes();
}

unsigned address_size = ELFHeader::AddressSizeInBytes(magic);
if (address_size == 4 || address_size == 8) {
  std::unique_ptr<ObjectFileELF> objfile_ap(new ObjectFileELF(
      module_sp, data_sp, data_offset, file, file_offset, length));
  ArchSpec spec;
  if (objfile_ap->GetArchitecture(spec) &&
      objfile_ap->SetModulesArchitecture(spec))
    return objfile_ap.release();
}

return NULL__null;
443}

445ObjectFile *ObjectFileELF::CreateMemoryInstance(
  const lldb::ModuleSP &module_sp, DataBufferSP &data_sp,
  const lldb::ProcessSP &process_sp, lldb::addr_t header_addr) {
if (data_sp && data_sp->GetByteSize() > (llvm::ELF::EI_NIDENT)) {
  const uint8_t *magic = data_sp->GetBytes();
  if (ELFHeader::MagicBytesMatch(magic)) {
    unsigned address_size = ELFHeader::AddressSizeInBytes(magic);
    if (address_size == 4 || address_size == 8) {
      std::unique_ptr<ObjectFileELF> objfile_ap(
          new ObjectFileELF(module_sp, data_sp, process_sp, header_addr));
      ArchSpec spec;
      if (objfile_ap->GetArchitecture(spec) &&
          objfile_ap->SetModulesArchitecture(spec))
        return objfile_ap.release();
    }
  }
}
return NULL__null;
463}

465bool ObjectFileELF::MagicBytesMatch(DataBufferSP &data_sp,
                                  lldb::addr_t data_offset,
                                  lldb::addr_t data_length) {
if (data_sp &&
    data_sp->GetByteSize() > (llvm::ELF::EI_NIDENT + data_offset)) {
  const uint8_t *magic = data_sp->GetBytes() + data_offset;
  return ELFHeader::MagicBytesMatch(magic);
}
return false;
474}

476/*
* crc function from http://svnweb.freebsd.org/base/head/sys/libkern/crc32.c
*
*   COPYRIGHT (C) 1986 Gary S. Brown. You may use this program, or
*   code or tables extracted from it, as desired without restriction.
*/
482static uint32_t calc_crc32(uint32_t crc, const void *buf, size_t size) {
static const uint32_t g_crc32_tab[] = {
    0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
    0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
    0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
    0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
    0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
    0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
    0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
    0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
    0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
    0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
    0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
    0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
    0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
    0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
    0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
    0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
    0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
    0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
    0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
    0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
    0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
    0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
    0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
    0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
    0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
    0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
    0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
    0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
    0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
    0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
    0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
    0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
    0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
    0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
    0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
    0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
    0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
    0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
    0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
    0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
    0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
    0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
    0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d};
const uint8_t *p = (const uint8_t *)buf;

crc = crc ^ ~0U;
while (size--)
  crc = g_crc32_tab[(crc ^ *p++) & 0xFF] ^ (crc >> 8);
return crc ^ ~0U;
533}

535static uint32_t calc_gnu_debuglink_crc32(const void *buf, size_t size) {
return calc_crc32(0U, buf, size);
537}

539uint32_t ObjectFileELF::CalculateELFNotesSegmentsCRC32(
  const ProgramHeaderColl &program_headers, DataExtractor &object_data) {
typedef ProgramHeaderCollConstIter Iter;

uint32_t core_notes_crc = 0;

for (Iter I = program_headers.begin(); I != program_headers.end(); ++I) {
  if (I->p_type == llvm::ELF::PT_NOTE) {
    const elf_off ph_offset = I->p_offset;
    const size_t ph_size = I->p_filesz;

    DataExtractor segment_data;
    if (segment_data.SetData(object_data, ph_offset, ph_size) != ph_size) {
      // The ELF program header contained incorrect data, probably corefile
      // is incomplete or corrupted.
      break;
    }

    core_notes_crc = calc_crc32(core_notes_crc, segment_data.GetDataStart(),
                                segment_data.GetByteSize());
  }
}

return core_notes_crc;
563}

565static const char *OSABIAsCString(unsigned char osabi_byte) {
566#define _MAKE_OSABI_CASE(x)                                                    \
case x:                                                                      \
  return #x
switch (osabi_byte) {
  _MAKE_OSABI_CASE(ELFOSABI_NONE);
  _MAKE_OSABI_CASE(ELFOSABI_HPUX);
  _MAKE_OSABI_CASE(ELFOSABI_NETBSD);
  _MAKE_OSABI_CASE(ELFOSABI_GNU);
  _MAKE_OSABI_CASE(ELFOSABI_HURD);
  _MAKE_OSABI_CASE(ELFOSABI_SOLARIS);
  _MAKE_OSABI_CASE(ELFOSABI_AIX);
  _MAKE_OSABI_CASE(ELFOSABI_IRIX);
  _MAKE_OSABI_CASE(ELFOSABI_FREEBSD);
  _MAKE_OSABI_CASE(ELFOSABI_TRU64);
  _MAKE_OSABI_CASE(ELFOSABI_MODESTO);
  _MAKE_OSABI_CASE(ELFOSABI_OPENBSD);
  _MAKE_OSABI_CASE(ELFOSABI_OPENVMS);
  _MAKE_OSABI_CASE(ELFOSABI_NSK);
  _MAKE_OSABI_CASE(ELFOSABI_AROS);
  _MAKE_OSABI_CASE(ELFOSABI_FENIXOS);
  _MAKE_OSABI_CASE(ELFOSABI_C6000_ELFABI);
  _MAKE_OSABI_CASE(ELFOSABI_C6000_LINUX);
  _MAKE_OSABI_CASE(ELFOSABI_ARM);
  _MAKE_OSABI_CASE(ELFOSABI_STANDALONE);
default:
  return "<unknown-osabi>";
}
593#undef _MAKE_OSABI_CASE
594}

596//
597// WARNING : This function is being deprecated
598// It's functionality has moved to ArchSpec::SetArchitecture This function is
599// only being kept to validate the move.
600//
601// TODO : Remove this function
602static bool GetOsFromOSABI(unsigned char osabi_byte,
                         llvm::Triple::OSType &ostype) {
switch (osabi_byte) {
case ELFOSABI_AIX:
  ostype = llvm::Triple::OSType::AIX;
  break;
case ELFOSABI_FREEBSD:
  ostype = llvm::Triple::OSType::FreeBSD;
  break;
case ELFOSABI_GNU:
  ostype = llvm::Triple::OSType::Linux;
  break;
case ELFOSABI_NETBSD:
  ostype = llvm::Triple::OSType::NetBSD;
  break;
case ELFOSABI_OPENBSD:
  ostype = llvm::Triple::OSType::OpenBSD;
  break;
case ELFOSABI_SOLARIS:
  ostype = llvm::Triple::OSType::Solaris;
  break;
default:
  ostype = llvm::Triple::OSType::UnknownOS;
}
return ostype != llvm::Triple::OSType::UnknownOS;
627}

629size_t ObjectFileELF::GetModuleSpecifications(
  const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp,
  lldb::offset_t data_offset, lldb::offset_t file_offset,
  lldb::offset_t length, lldb_private::ModuleSpecList &specs) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21)));

const size_t initial_count = specs.GetSize();

if (ObjectFileELF::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize())) {
  DataExtractor data;
  data.SetData(data_sp);
  elf::ELFHeader header;
  lldb::offset_t header_offset = data_offset;
  if (header.Parse(data, &header_offset)) {
    if (data_sp) {
      ModuleSpec spec(file);

      const uint32_t sub_type = subTypeFromElfHeader(header);
      spec.GetArchitecture().SetArchitecture(
          eArchTypeELF, header.e_machine, sub_type, header.e_ident[EI_OSABI]);

      if (spec.GetArchitecture().IsValid()) {
        llvm::Triple::OSType ostype;
        llvm::Triple::VendorType vendor;
        llvm::Triple::OSType spec_ostype =
            spec.GetArchitecture().GetTriple().getOS();

        if (log)
          log->Printf("ObjectFileELF::%s file '%s' module OSABI: %s",
                      __FUNCTION__, file.GetPath().c_str(),
                      OSABIAsCString(header.e_ident[EI_OSABI]));

        // SetArchitecture should have set the vendor to unknown
        vendor = spec.GetArchitecture().GetTriple().getVendor();
        assert(vendor == llvm::Triple::UnknownVendor)((vendor == llvm::Triple::UnknownVendor) ? static_cast<void
> (0) : __assert_fail ("vendor == llvm::Triple::UnknownVendor"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 663, __PRETTY_FUNCTION__));
        UNUSED_IF_ASSERT_DISABLED(vendor)((void)(vendor));

        //
        // Validate it is ok to remove GetOsFromOSABI
        GetOsFromOSABI(header.e_ident[EI_OSABI], ostype);
        assert(spec_ostype == ostype)((spec_ostype == ostype) ? static_cast<void> (0) : __assert_fail
 ("spec_ostype == ostype", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 669, __PRETTY_FUNCTION__));
        if (spec_ostype != llvm::Triple::OSType::UnknownOS) {
          if (log)
            log->Printf("ObjectFileELF::%s file '%s' set ELF module OS type "
                        "from ELF header OSABI.",
                        __FUNCTION__, file.GetPath().c_str());
        }

        data_sp = MapFileData(file, -1, file_offset);
        if (data_sp)
          data.SetData(data_sp);
        // In case there is header extension in the section #0, the header we
        // parsed above could have sentinel values for e_phnum, e_shnum, and
        // e_shstrndx.  In this case we need to reparse the header with a
        // bigger data source to get the actual values.
        if (header.HasHeaderExtension()) {
          lldb::offset_t header_offset = data_offset;
          header.Parse(data, &header_offset);
        }

        uint32_t gnu_debuglink_crc = 0;
        std::string gnu_debuglink_file;
        SectionHeaderColl section_headers;
        lldb_private::UUID &uuid = spec.GetUUID();

        GetSectionHeaderInfo(section_headers, data, header, uuid,
                             gnu_debuglink_file, gnu_debuglink_crc,
                             spec.GetArchitecture());

        llvm::Triple &spec_triple = spec.GetArchitecture().GetTriple();

        if (log)
          log->Printf("ObjectFileELF::%s file '%s' module set to triple: %s "
                      "(architecture %s)",
                      __FUNCTION__, file.GetPath().c_str(),
                      spec_triple.getTriple().c_str(),
                      spec.GetArchitecture().GetArchitectureName());

        if (!uuid.IsValid()) {
          uint32_t core_notes_crc = 0;

          if (!gnu_debuglink_crc) {
            static Timer::Category func_cat(LLVM_PRETTY_FUNCTION__PRETTY_FUNCTION__);
            lldb_private::Timer scoped_timer(
                func_cat,
                "Calculating module crc32 %s with size %" PRIu64"l" "u" " KiB",
                file.GetLastPathComponent().AsCString(),
                (file.GetByteSize() - file_offset) / 1024);

            // For core files - which usually don't happen to have a
            // gnu_debuglink, and are pretty bulky - calculating whole
            // contents crc32 would be too much of luxury.  Thus we will need
            // to fallback to something simpler.
            if (header.e_type == llvm::ELF::ET_CORE) {
              ProgramHeaderColl program_headers;
              GetProgramHeaderInfo(program_headers, data, header);

              core_notes_crc =
                  CalculateELFNotesSegmentsCRC32(program_headers, data);
            } else {
              gnu_debuglink_crc = calc_gnu_debuglink_crc32(
                  data.GetDataStart(), data.GetByteSize());
            }
          }
          using u32le = llvm::support::ulittle32_t;
          if (gnu_debuglink_crc) {
            // Use 4 bytes of crc from the .gnu_debuglink section.
            u32le data(gnu_debuglink_crc);
            uuid = UUID::fromData(&data, sizeof(data));
          } else if (core_notes_crc) {
            // Use 8 bytes - first 4 bytes for *magic* prefix, mainly to make
            // it look different form .gnu_debuglink crc followed by 4 bytes
            // of note segments crc.
            u32le data[] = {u32le(g_core_uuid_magic), u32le(core_notes_crc)};
            uuid = UUID::fromData(data, sizeof(data));
          }
        }

        specs.Append(spec);
      }
    }
  }
}

return specs.GetSize() - initial_count;
754}

756//------------------------------------------------------------------
757// PluginInterface protocol
758//------------------------------------------------------------------
759lldb_private::ConstString ObjectFileELF::GetPluginName() {
return GetPluginNameStatic();
761}

763uint32_t ObjectFileELF::GetPluginVersion() { return m_plugin_version; }
764//------------------------------------------------------------------
765// ObjectFile protocol
766//------------------------------------------------------------------

768ObjectFileELF::ObjectFileELF(const lldb::ModuleSP &module_sp,
                           DataBufferSP &data_sp, lldb::offset_t data_offset,
                           const FileSpec *file, lldb::offset_t file_offset,
                           lldb::offset_t length)
  : ObjectFile(module_sp, file, file_offset, length, data_sp, data_offset),
    m_header(), m_uuid(), m_gnu_debuglink_file(), m_gnu_debuglink_crc(0),
    m_program_headers(), m_section_headers(), m_dynamic_symbols(),
    m_filespec_ap(), m_entry_point_address(), m_arch_spec() {
if (file)
  m_file = *file;
::memset(&m_header, 0, sizeof(m_header));
779}

781ObjectFileELF::ObjectFileELF(const lldb::ModuleSP &module_sp,
                           DataBufferSP &header_data_sp,
                           const lldb::ProcessSP &process_sp,
                           addr_t header_addr)
  : ObjectFile(module_sp, process_sp, header_addr, header_data_sp),
    m_header(), m_uuid(), m_gnu_debuglink_file(), m_gnu_debuglink_crc(0),
    m_program_headers(), m_section_headers(), m_dynamic_symbols(),
    m_filespec_ap(), m_entry_point_address(), m_arch_spec() {
::memset(&m_header, 0, sizeof(m_header));
790}

792ObjectFileELF::~ObjectFileELF() {}

794bool ObjectFileELF::IsExecutable() const {
return ((m_header.e_type & ET_EXEC) != 0) || (m_header.e_entry != 0);
796}

798bool ObjectFileELF::SetLoadAddress(Target &target, lldb::addr_t value,
                                 bool value_is_offset) {
ModuleSP module_sp = GetModule();
if (module_sp) {
  size_t num_loaded_sections = 0;
  SectionList *section_list = GetSectionList();
  if (section_list) {
    if (!value_is_offset) {
      bool found_offset = false;
      for (size_t i = 1, count = GetProgramHeaderCount(); i <= count; ++i) {
        const elf::ELFProgramHeader *header = GetProgramHeaderByIndex(i);
        if (header == nullptr)
          continue;

        if (header->p_type != PT_LOAD || header->p_offset != 0)
          continue;

        value = value - header->p_vaddr;
        found_offset = true;
        break;
      }
      if (!found_offset)
        return false;
    }

    const size_t num_sections = section_list->GetSize();
    size_t sect_idx = 0;

    for (sect_idx = 0; sect_idx < num_sections; ++sect_idx) {
      // Iterate through the object file sections to find all of the sections
      // that have SHF_ALLOC in their flag bits.
      SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx));
      if (section_sp && section_sp->Test(SHF_ALLOC)) {
        lldb::addr_t load_addr = section_sp->GetFileAddress();
        // We don't want to update the load address of a section with type
        // eSectionTypeAbsoluteAddress as they already have the absolute load
        // address already specified
        if (section_sp->GetType() != eSectionTypeAbsoluteAddress)
          load_addr += value;

        // On 32-bit systems the load address have to fit into 4 bytes. The
        // rest of the bytes are the overflow from the addition.
        if (GetAddressByteSize() == 4)
          load_addr &= 0xFFFFFFFF;

        if (target.GetSectionLoadList().SetSectionLoadAddress(section_sp,
                                                              load_addr))
          ++num_loaded_sections;
      }
    }
    return num_loaded_sections > 0;
  }
}
return false;
852}

854ByteOrder ObjectFileELF::GetByteOrder() const {
if (m_header.e_ident[EI_DATA] == ELFDATA2MSB)
  return eByteOrderBig;
if (m_header.e_ident[EI_DATA] == ELFDATA2LSB)
  return eByteOrderLittle;
return eByteOrderInvalid;
860}

862uint32_t ObjectFileELF::GetAddressByteSize() const {
return m_data.GetAddressByteSize();
864}

866AddressClass ObjectFileELF::GetAddressClass(addr_t file_addr) {
Symtab *symtab = GetSymtab();
if (!symtab)
  return AddressClass::eUnknown;

// The address class is determined based on the symtab. Ask it from the
// object file what contains the symtab information.
ObjectFile *symtab_objfile = symtab->GetObjectFile();
if (symtab_objfile != nullptr && symtab_objfile != this)
  return symtab_objfile->GetAddressClass(file_addr);

auto res = ObjectFile::GetAddressClass(file_addr);
if (res != AddressClass::eCode)
  return res;

auto ub = m_address_class_map.upper_bound(file_addr);
if (ub == m_address_class_map.begin()) {
  // No entry in the address class map before the address. Return default
  // address class for an address in a code section.
  return AddressClass::eCode;
}

// Move iterator to the address class entry preceding address
--ub;

return ub->second;
892}

894size_t ObjectFileELF::SectionIndex(const SectionHeaderCollIter &I) {
return std::distance(m_section_headers.begin(), I) + 1u;
896}

898size_t ObjectFileELF::SectionIndex(const SectionHeaderCollConstIter &I) const {
return std::distance(m_section_headers.begin(), I) + 1u;
900}

902bool ObjectFileELF::ParseHeader() {
lldb::offset_t offset = 0;
return m_header.Parse(m_data, &offset);
905}

907bool ObjectFileELF::GetUUID(lldb_private::UUID *uuid) {
// Need to parse the section list to get the UUIDs, so make sure that's been
// done.
if (!ParseSectionHeaders() && GetType() != ObjectFile::eTypeCoreFile)
  return false;

using u32le = llvm::support::ulittle32_t;
if (m_uuid.IsValid()) {
  // We have the full build id uuid.
  *uuid = m_uuid;
  return true;
} else if (GetType() == ObjectFile::eTypeCoreFile) {
  uint32_t core_notes_crc = 0;

  if (!ParseProgramHeaders())
    return false;

  core_notes_crc = CalculateELFNotesSegmentsCRC32(m_program_headers, m_data);

  if (core_notes_crc) {
    // Use 8 bytes - first 4 bytes for *magic* prefix, mainly to make it look
    // different form .gnu_debuglink crc - followed by 4 bytes of note
    // segments crc.
    u32le data[] = {u32le(g_core_uuid_magic), u32le(core_notes_crc)};
    m_uuid = UUID::fromData(data, sizeof(data));
  }
} else {
  if (!m_gnu_debuglink_crc)
    m_gnu_debuglink_crc =
        calc_gnu_debuglink_crc32(m_data.GetDataStart(), m_data.GetByteSize());
  if (m_gnu_debuglink_crc) {
    // Use 4 bytes of crc from the .gnu_debuglink section.
    u32le data(m_gnu_debuglink_crc);
    m_uuid = UUID::fromData(&data, sizeof(data));
  }
}

if (m_uuid.IsValid()) {
  *uuid = m_uuid;
  return true;
}

return false;
950}

952lldb_private::FileSpecList ObjectFileELF::GetDebugSymbolFilePaths() {
FileSpecList file_spec_list;

if (!m_gnu_debuglink_file.empty()) {
  FileSpec file_spec(m_gnu_debuglink_file, false);
  file_spec_list.Append(file_spec);
}
return file_spec_list;
960}

962uint32_t ObjectFileELF::GetDependentModules(FileSpecList &files) {
size_t num_modules = ParseDependentModules();
uint32_t num_specs = 0;

for (unsigned i = 0; i < num_modules; ++i) {
  if (files.AppendIfUnique(m_filespec_ap->GetFileSpecAtIndex(i)))
    num_specs++;
}

return num_specs;
972}

974Address ObjectFileELF::GetImageInfoAddress(Target *target) {
if (!ParseDynamicSymbols())
  return Address();

SectionList *section_list = GetSectionList();
if (!section_list)
  return Address();

// Find the SHT_DYNAMIC (.dynamic) section.
SectionSP dynsym_section_sp(
    section_list->FindSectionByType(eSectionTypeELFDynamicLinkInfo, true));
if (!dynsym_section_sp)
  return Address();
assert(dynsym_section_sp->GetObjectFile() == this)((dynsym_section_sp->GetObjectFile() == this) ? static_cast
<void> (0) : __assert_fail ("dynsym_section_sp->GetObjectFile() == this"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 987, __PRETTY_FUNCTION__));

user_id_t dynsym_id = dynsym_section_sp->GetID();
const ELFSectionHeaderInfo *dynsym_hdr = GetSectionHeaderByIndex(dynsym_id);
if (!dynsym_hdr)
  return Address();

for (size_t i = 0; i < m_dynamic_symbols.size(); ++i) {
  ELFDynamic &symbol = m_dynamic_symbols[i];

  if (symbol.d_tag == DT_DEBUG) {
    // Compute the offset as the number of previous entries plus the size of
    // d_tag.
    addr_t offset = i * dynsym_hdr->sh_entsize + GetAddressByteSize();
    return Address(dynsym_section_sp, offset);
  }
  // MIPS executables uses DT_MIPS_RLD_MAP_REL to support PIE. DT_MIPS_RLD_MAP
  // exists in non-PIE.
  else if ((symbol.d_tag == DT_MIPS_RLD_MAP ||
            symbol.d_tag == DT_MIPS_RLD_MAP_REL) &&
           target) {
    addr_t offset = i * dynsym_hdr->sh_entsize + GetAddressByteSize();
    addr_t dyn_base = dynsym_section_sp->GetLoadBaseAddress(target);
    if (dyn_base == LLDB_INVALID_ADDRESS(18446744073709551615UL))
      return Address();

    Status error;
    if (symbol.d_tag == DT_MIPS_RLD_MAP) {
      // DT_MIPS_RLD_MAP tag stores an absolute address of the debug pointer.
      Address addr;
      if (target->ReadPointerFromMemory(dyn_base + offset, false, error,
                                        addr))
        return addr;
    }
    if (symbol.d_tag == DT_MIPS_RLD_MAP_REL) {
      // DT_MIPS_RLD_MAP_REL tag stores the offset to the debug pointer,
      // relative to the address of the tag.
      uint64_t rel_offset;
      rel_offset = target->ReadUnsignedIntegerFromMemory(
          dyn_base + offset, false, GetAddressByteSize(), UINT64_MAX(18446744073709551615UL), error);
      if (error.Success() && rel_offset != UINT64_MAX(18446744073709551615UL)) {
        Address addr;
        addr_t debug_ptr_address =
            dyn_base + (offset - GetAddressByteSize()) + rel_offset;
        addr.SetOffset(debug_ptr_address);
        return addr;
      }
    }
  }
}

return Address();
1039}

1041lldb_private::Address ObjectFileELF::GetEntryPointAddress() {
if (m_entry_point_address.IsValid())
  return m_entry_point_address;

if (!ParseHeader() || !IsExecutable())
  return m_entry_point_address;

SectionList *section_list = GetSectionList();
addr_t offset = m_header.e_entry;

if (!section_list)
  m_entry_point_address.SetOffset(offset);
else
  m_entry_point_address.ResolveAddressUsingFileSections(offset, section_list);
return m_entry_point_address;
1056}

1058//----------------------------------------------------------------------
1059// ParseDependentModules
1060//----------------------------------------------------------------------
1061size_t ObjectFileELF::ParseDependentModules() {
if (m_filespec_ap.get())
  return m_filespec_ap->GetSize();

m_filespec_ap.reset(new FileSpecList());

if (!ParseSectionHeaders())
  return 0;

SectionList *section_list = GetSectionList();
if (!section_list)
  return 0;

// Find the SHT_DYNAMIC section.
Section *dynsym =
    section_list->FindSectionByType(eSectionTypeELFDynamicLinkInfo, true)
        .get();
if (!dynsym)
  return 0;
assert(dynsym->GetObjectFile() == this)((dynsym->GetObjectFile() == this) ? static_cast<void>
 (0) : __assert_fail ("dynsym->GetObjectFile() == this", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 1080, __PRETTY_FUNCTION__));

const ELFSectionHeaderInfo *header = GetSectionHeaderByIndex(dynsym->GetID());
if (!header)
  return 0;
// sh_link: section header index of string table used by entries in the
// section.
Section *dynstr = section_list->FindSectionByID(header->sh_link + 1).get();
if (!dynstr)
  return 0;

DataExtractor dynsym_data;
DataExtractor dynstr_data;
if (ReadSectionData(dynsym, dynsym_data) &&
    ReadSectionData(dynstr, dynstr_data)) {
  ELFDynamic symbol;
  const lldb::offset_t section_size = dynsym_data.GetByteSize();
  lldb::offset_t offset = 0;

  // The only type of entries we are concerned with are tagged DT_NEEDED,
  // yielding the name of a required library.
  while (offset < section_size) {
    if (!symbol.Parse(dynsym_data, &offset))
      break;

    if (symbol.d_tag != DT_NEEDED)
      continue;

    uint32_t str_index = static_cast<uint32_t>(symbol.d_val);
    const char *lib_name = dynstr_data.PeekCStr(str_index);
    m_filespec_ap->Append(FileSpec(lib_name, true));
  }
}

return m_filespec_ap->GetSize();
1115}

1117//----------------------------------------------------------------------
1118// GetProgramHeaderInfo
1119//----------------------------------------------------------------------
1120size_t ObjectFileELF::GetProgramHeaderInfo(ProgramHeaderColl &program_headers,
                                         DataExtractor &object_data,
                                         const ELFHeader &header) {
// We have already parsed the program headers
if (!program_headers.empty())
  return program_headers.size();

// If there are no program headers to read we are done.
if (header.e_phnum == 0)
  return 0;

program_headers.resize(header.e_phnum);
if (program_headers.size() != header.e_phnum)
  return 0;

const size_t ph_size = header.e_phnum * header.e_phentsize;
const elf_off ph_offset = header.e_phoff;
DataExtractor data;
if (data.SetData(object_data, ph_offset, ph_size) != ph_size)
  return 0;

uint32_t idx;
lldb::offset_t offset;
for (idx = 0, offset = 0; idx < header.e_phnum; ++idx) {
  if (program_headers[idx].Parse(data, &offset) == false)
    break;
}

if (idx < program_headers.size())
  program_headers.resize(idx);

return program_headers.size();
1152}

1154//----------------------------------------------------------------------
1155// ParseProgramHeaders
1156//----------------------------------------------------------------------
1157size_t ObjectFileELF::ParseProgramHeaders() {
return GetProgramHeaderInfo(m_program_headers, m_data, m_header);
1159}

1161lldb_private::Status
1162ObjectFileELF::RefineModuleDetailsFromNote(lldb_private::DataExtractor &data,
                                         lldb_private::ArchSpec &arch_spec,
                                         lldb_private::UUID &uuid) {
Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21)));
Status error;

lldb::offset_t offset = 0;

while (true) {
  // Parse the note header.  If this fails, bail out.
  const lldb::offset_t note_offset = offset;
  ELFNote note = ELFNote();
  if (!note.Parse(data, &offset)) {
    // We're done.
    return error;
  }

  if (log)
    log->Printf("ObjectFileELF::%s parsing note name='%s', type=%" PRIu32"u",
                __FUNCTION__, note.n_name.c_str(), note.n_type);

  // Process FreeBSD ELF notes.
  if ((note.n_name == LLDB_NT_OWNER_FREEBSD) &&
      (note.n_type == LLDB_NT_FREEBSD_ABI_TAG) &&
      (note.n_descsz == LLDB_NT_FREEBSD_ABI_SIZE)) {
    // Pull out the min version info.
    uint32_t version_info;
    if (data.GetU32(&offset, &version_info, 1) == nullptr) {
      error.SetErrorString("failed to read FreeBSD ABI note payload");
      return error;
    }

    // Convert the version info into a major/minor number.
    const uint32_t version_major = version_info / 100000;
    const uint32_t version_minor = (version_info / 1000) % 100;

    char os_name[32];
    snprintf(os_name, sizeof(os_name), "freebsd%" PRIu32"u" ".%" PRIu32"u",
             version_major, version_minor);

    // Set the elf OS version to FreeBSD.  Also clear the vendor.
    arch_spec.GetTriple().setOSName(os_name);
    arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::UnknownVendor);

    if (log)
      log->Printf("ObjectFileELF::%s detected FreeBSD %" PRIu32"u" ".%" PRIu32"u"
                  ".%" PRIu32"u",
                  __FUNCTION__, version_major, version_minor,
                  static_cast<uint32_t>(version_info % 1000));
  }
  // Process GNU ELF notes.
  else if (note.n_name == LLDB_NT_OWNER_GNU) {
    switch (note.n_type) {
    case LLDB_NT_GNU_ABI_TAG:
      if (note.n_descsz == LLDB_NT_GNU_ABI_SIZE) {
        // Pull out the min OS version supporting the ABI.
        uint32_t version_info[4];
        if (data.GetU32(&offset, &version_info[0], note.n_descsz / 4) ==
            nullptr) {
          error.SetErrorString("failed to read GNU ABI note payload");
          return error;
        }

        // Set the OS per the OS field.
        switch (version_info[0]) {
        case LLDB_NT_GNU_ABI_OS_LINUX:
          arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
          arch_spec.GetTriple().setVendor(
              llvm::Triple::VendorType::UnknownVendor);
          if (log)
            log->Printf(
                "ObjectFileELF::%s detected Linux, min version %" PRIu32"u"
                ".%" PRIu32"u" ".%" PRIu32"u",
                __FUNCTION__, version_info[1], version_info[2],
                version_info[3]);
          // FIXME we have the minimal version number, we could be propagating
          // that.  version_info[1] = OS Major, version_info[2] = OS Minor,
          // version_info[3] = Revision.
          break;
        case LLDB_NT_GNU_ABI_OS_HURD:
          arch_spec.GetTriple().setOS(llvm::Triple::OSType::UnknownOS);
          arch_spec.GetTriple().setVendor(
              llvm::Triple::VendorType::UnknownVendor);
          if (log)
            log->Printf("ObjectFileELF::%s detected Hurd (unsupported), min "
                        "version %" PRIu32"u" ".%" PRIu32"u" ".%" PRIu32"u",
                        __FUNCTION__, version_info[1], version_info[2],
                        version_info[3]);
          break;
        case LLDB_NT_GNU_ABI_OS_SOLARIS:
          arch_spec.GetTriple().setOS(llvm::Triple::OSType::Solaris);
          arch_spec.GetTriple().setVendor(
              llvm::Triple::VendorType::UnknownVendor);
          if (log)
            log->Printf(
                "ObjectFileELF::%s detected Solaris, min version %" PRIu32"u"
                ".%" PRIu32"u" ".%" PRIu32"u",
                __FUNCTION__, version_info[1], version_info[2],
                version_info[3]);
          break;
        default:
          if (log)
            log->Printf(
                "ObjectFileELF::%s unrecognized OS in note, id %" PRIu32"u"
                ", min version %" PRIu32"u" ".%" PRIu32"u" ".%" PRIu32"u",
                __FUNCTION__, version_info[0], version_info[1],
                version_info[2], version_info[3]);
          break;
        }
      }
      break;

    case LLDB_NT_GNU_BUILD_ID_TAG:
      // Only bother processing this if we don't already have the uuid set.
      if (!uuid.IsValid()) {
        // 16 bytes is UUID|MD5, 20 bytes is SHA1. Other linkers may produce a
        // build-id of a different length. Accept it as long as it's at least
        // 4 bytes as it will be better than our own crc32.
        if (note.n_descsz >= 4) {
          if (const uint8_t *buf = data.PeekData(offset, note.n_descsz)) {
            // Save the build id as the UUID for the module.
            uuid = UUID::fromData(buf, note.n_descsz);
          } else {
            error.SetErrorString("failed to read GNU_BUILD_ID note payload");
            return error;
          }
        }
      }
      break;
    }
    if (arch_spec.IsMIPS() &&
        arch_spec.GetTriple().getOS() == llvm::Triple::OSType::UnknownOS)
      // The note.n_name == LLDB_NT_OWNER_GNU is valid for Linux platform
      arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
  }
  // Process NetBSD ELF notes.
  else if ((note.n_name == LLDB_NT_OWNER_NETBSD) &&
           (note.n_type == LLDB_NT_NETBSD_ABI_TAG) &&
           (note.n_descsz == LLDB_NT_NETBSD_ABI_SIZE)) {
    // Pull out the min version info.
    uint32_t version_info;
    if (data.GetU32(&offset, &version_info, 1) == nullptr) {
      error.SetErrorString("failed to read NetBSD ABI note payload");
      return error;
    }

    // Set the elf OS version to NetBSD.  Also clear the vendor.
    arch_spec.GetTriple().setOS(llvm::Triple::OSType::NetBSD);
    arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::UnknownVendor);

    if (log)
      log->Printf(
          "ObjectFileELF::%s detected NetBSD, min version constant %" PRIu32"u",
          __FUNCTION__, version_info);
  }
  // Process OpenBSD ELF notes.
  else if (note.n_name == LLDB_NT_OWNER_OPENBSD) {
    // Set the elf OS version to OpenBSD.  Also clear the vendor.
    arch_spec.GetTriple().setOS(llvm::Triple::OSType::OpenBSD);
    arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::UnknownVendor);
  }
  // Process CSR kalimba notes
  else if ((note.n_type == LLDB_NT_GNU_ABI_TAG) &&
           (note.n_name == LLDB_NT_OWNER_CSR)) {
    arch_spec.GetTriple().setOS(llvm::Triple::OSType::UnknownOS);
    arch_spec.GetTriple().setVendor(llvm::Triple::VendorType::CSR);

    // TODO At some point the description string could be processed.
    // It could provide a steer towards the kalimba variant which this ELF
    // targets.
    if (note.n_descsz) {
      const char *cstr =
          data.GetCStr(&offset, llvm::alignTo(note.n_descsz, 4));
      (void)cstr;
    }
  } else if (note.n_name == LLDB_NT_OWNER_ANDROID) {
    arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
    arch_spec.GetTriple().setEnvironment(
        llvm::Triple::EnvironmentType::Android);
  } else if (note.n_name == LLDB_NT_OWNER_LINUX) {
    // This is sometimes found in core files and usually contains extended
    // register info
    arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
  } else if (note.n_name == LLDB_NT_OWNER_CORE) {
    // Parse the NT_FILE to look for stuff in paths to shared libraries As
    // the contents look like this in a 64 bit ELF core file: count     =
    // 0x000000000000000a (10) page_size = 0x0000000000001000 (4096) Index
    // start              end                file_ofs           path =====
    // ------------------ ------------------ ------------------
    // ------------------------------------- [  0] 0x0000000000400000
    // 0x0000000000401000 0x0000000000000000 /tmp/a.out [  1]
    // 0x0000000000600000 0x0000000000601000 0x0000000000000000 /tmp/a.out [
    // 2] 0x0000000000601000 0x0000000000602000 0x0000000000000001 /tmp/a.out
    // [  3] 0x00007fa79c9ed000 0x00007fa79cba8000 0x0000000000000000
    // /lib/x86_64-linux-gnu/libc-2.19.so [  4] 0x00007fa79cba8000
    // 0x00007fa79cda7000 0x00000000000001bb /lib/x86_64-linux-
    // gnu/libc-2.19.so [  5] 0x00007fa79cda7000 0x00007fa79cdab000
    // 0x00000000000001ba /lib/x86_64-linux-gnu/libc-2.19.so [  6]
    // 0x00007fa79cdab000 0x00007fa79cdad000 0x00000000000001be /lib/x86_64
    // -linux-gnu/libc-2.19.so [  7] 0x00007fa79cdb2000 0x00007fa79cdd5000
    // 0x0000000000000000 /lib/x86_64-linux-gnu/ld-2.19.so [  8]
    // 0x00007fa79cfd4000 0x00007fa79cfd5000 0x0000000000000022 /lib/x86_64
    // -linux-gnu/ld-2.19.so [  9] 0x00007fa79cfd5000 0x00007fa79cfd6000
    // 0x0000000000000023 /lib/x86_64-linux-gnu/ld-2.19.so In the 32 bit ELFs
    // the count, page_size, start, end, file_ofs are uint32_t For reference:
    // see readelf source code (in binutils).
    if (note.n_type == NT_FILE0x46494c45) {
      uint64_t count = data.GetAddress(&offset);
      const char *cstr;
      data.GetAddress(&offset); // Skip page size
      offset += count * 3 *
                data.GetAddressByteSize(); // Skip all start/end/file_ofs
      for (size_t i = 0; i < count; ++i) {
        cstr = data.GetCStr(&offset);
        if (cstr == nullptr) {
          error.SetErrorStringWithFormat("ObjectFileELF::%s trying to read "
                                         "at an offset after the end "
                                         "(GetCStr returned nullptr)",
                                         __FUNCTION__);
          return error;
        }
        llvm::StringRef path(cstr);
        if (path.contains("/lib/x86_64-linux-gnu") || path.contains("/lib/i386-linux-gnu")) {
          arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
          break;
        }
      }
      if (arch_spec.IsMIPS() &&
          arch_spec.GetTriple().getOS() == llvm::Triple::OSType::UnknownOS)
        // In case of MIPSR6, the LLDB_NT_OWNER_GNU note is missing for some
        // cases (e.g. compile with -nostdlib) Hence set OS to Linux
        arch_spec.GetTriple().setOS(llvm::Triple::OSType::Linux);
    }
  }

  // Calculate the offset of the next note just in case "offset" has been
  // used to poke at the contents of the note data
  offset = note_offset + note.GetByteSize();
}

return error;
1403}

1405void ObjectFileELF::ParseARMAttributes(DataExtractor &data, uint64_t length,
                                     ArchSpec &arch_spec) {
lldb::offset_t Offset = 0;

uint8_t FormatVersion = data.GetU8(&Offset);
if (FormatVersion != llvm::ARMBuildAttrs::Format_Version)
  return;

Offset = Offset + sizeof(uint32_t); // Section Length
llvm::StringRef VendorName = data.GetCStr(&Offset);

if (VendorName != "aeabi")
  return;

if (arch_spec.GetTriple().getEnvironment() ==
    llvm::Triple::UnknownEnvironment)
  arch_spec.GetTriple().setEnvironment(llvm::Triple::EABI);

while (Offset < length) {
  uint8_t Tag = data.GetU8(&Offset);
  uint32_t Size = data.GetU32(&Offset);

  if (Tag != llvm::ARMBuildAttrs::File || Size == 0)
    continue;

  while (Offset < length) {
    uint64_t Tag = data.GetULEB128(&Offset);
    switch (Tag) {
    default:
      if (Tag < 32)
        data.GetULEB128(&Offset);
      else if (Tag % 2 == 0)
        data.GetULEB128(&Offset);
      else
        data.GetCStr(&Offset);

      break;

    case llvm::ARMBuildAttrs::CPU_raw_name:
    case llvm::ARMBuildAttrs::CPU_name:
      data.GetCStr(&Offset);

      break;

    case llvm::ARMBuildAttrs::ABI_VFP_args: {
      uint64_t VFPArgs = data.GetULEB128(&Offset);

      if (VFPArgs == llvm::ARMBuildAttrs::BaseAAPCS) {
        if (arch_spec.GetTriple().getEnvironment() ==
                llvm::Triple::UnknownEnvironment ||
            arch_spec.GetTriple().getEnvironment() == llvm::Triple::EABIHF)
          arch_spec.GetTriple().setEnvironment(llvm::Triple::EABI);

        arch_spec.SetFlags(ArchSpec::eARM_abi_soft_float);
      } else if (VFPArgs == llvm::ARMBuildAttrs::HardFPAAPCS) {
        if (arch_spec.GetTriple().getEnvironment() ==
                llvm::Triple::UnknownEnvironment ||
            arch_spec.GetTriple().getEnvironment() == llvm::Triple::EABI)
          arch_spec.GetTriple().setEnvironment(llvm::Triple::EABIHF);

        arch_spec.SetFlags(ArchSpec::eARM_abi_hard_float);
      }

      break;
    }
    }
  }
}
1473}

1475//----------------------------------------------------------------------
1476// GetSectionHeaderInfo
1477//----------------------------------------------------------------------
1478size_t ObjectFileELF::GetSectionHeaderInfo(SectionHeaderColl &section_headers,
                                         DataExtractor &object_data,
                                         const elf::ELFHeader &header,
                                         lldb_private::UUID &uuid,
                                         std::string &gnu_debuglink_file,
                                         uint32_t &gnu_debuglink_crc,
                                         ArchSpec &arch_spec) {
// Don't reparse the section headers if we already did that.
if (!section_headers.empty())
  return section_headers.size();

// Only initialize the arch_spec to okay defaults if they're not already set.
// We'll refine this with note data as we parse the notes.
if (arch_spec.GetTriple().getOS() == llvm::Triple::OSType::UnknownOS) {
  llvm::Triple::OSType ostype;
  llvm::Triple::OSType spec_ostype;
  const uint32_t sub_type = subTypeFromElfHeader(header);
  arch_spec.SetArchitecture(eArchTypeELF, header.e_machine, sub_type,
                            header.e_ident[EI_OSABI]);

  // Validate if it is ok to remove GetOsFromOSABI. Note, that now the OS is
  // determined based on EI_OSABI flag and the info extracted from ELF notes
  // (see RefineModuleDetailsFromNote). However in some cases that still
  // might be not enough: for example a shared library might not have any
  // notes at all and have EI_OSABI flag set to System V, as result the OS
  // will be set to UnknownOS.
  GetOsFromOSABI(header.e_ident[EI_OSABI], ostype);
  spec_ostype = arch_spec.GetTriple().getOS();
  assert(spec_ostype == ostype)((spec_ostype == ostype) ? static_cast<void> (0) : __assert_fail
 ("spec_ostype == ostype", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 1506, __PRETTY_FUNCTION__));
  UNUSED_IF_ASSERT_DISABLED(spec_ostype)((void)(spec_ostype));
}

if (arch_spec.GetMachine() == llvm::Triple::mips ||
    arch_spec.GetMachine() == llvm::Triple::mipsel ||
    arch_spec.GetMachine() == llvm::Triple::mips64 ||
    arch_spec.GetMachine() == llvm::Triple::mips64el) {
  switch (header.e_flags & llvm::ELF::EF_MIPS_ARCH_ASE) {
  case llvm::ELF::EF_MIPS_MICROMIPS:
    arch_spec.SetFlags(ArchSpec::eMIPSAse_micromips);
    break;
  case llvm::ELF::EF_MIPS_ARCH_ASE_M16:
    arch_spec.SetFlags(ArchSpec::eMIPSAse_mips16);
    break;
  case llvm::ELF::EF_MIPS_ARCH_ASE_MDMX:
    arch_spec.SetFlags(ArchSpec::eMIPSAse_mdmx);
    break;
  default:
    break;
  }
}

if (arch_spec.GetMachine() == llvm::Triple::arm ||
    arch_spec.GetMachine() == llvm::Triple::thumb) {
  if (header.e_flags & llvm::ELF::EF_ARM_SOFT_FLOAT)
    arch_spec.SetFlags(ArchSpec::eARM_abi_soft_float);
  else if (header.e_flags & llvm::ELF::EF_ARM_VFP_FLOAT)
    arch_spec.SetFlags(ArchSpec::eARM_abi_hard_float);
}

// If there are no section headers we are done.
if (header.e_shnum == 0)
  return 0;

Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21)));

section_headers.resize(header.e_shnum);
if (section_headers.size() != header.e_shnum)
  return 0;

const size_t sh_size = header.e_shnum * header.e_shentsize;
const elf_off sh_offset = header.e_shoff;
DataExtractor sh_data;
if (sh_data.SetData(object_data, sh_offset, sh_size) != sh_size)
  return 0;

uint32_t idx;
lldb::offset_t offset;
for (idx = 0, offset = 0; idx < header.e_shnum; ++idx) {
  if (section_headers[idx].Parse(sh_data, &offset) == false)
    break;
}
if (idx < section_headers.size())
  section_headers.resize(idx);

const unsigned strtab_idx = header.e_shstrndx;
if (strtab_idx && strtab_idx < section_headers.size()) {
  const ELFSectionHeaderInfo &sheader = section_headers[strtab_idx];
  const size_t byte_size = sheader.sh_size;
  const Elf64_Off offset = sheader.sh_offset;
  lldb_private::DataExtractor shstr_data;

  if (shstr_data.SetData(object_data, offset, byte_size) == byte_size) {
    for (SectionHeaderCollIter I = section_headers.begin();
         I != section_headers.end(); ++I) {
      static ConstString g_sect_name_gnu_debuglink(".gnu_debuglink");
      const ELFSectionHeaderInfo &sheader = *I;
      const uint64_t section_size =
          sheader.sh_type == SHT_NOBITS ? 0 : sheader.sh_size;
      ConstString name(shstr_data.PeekCStr(I->sh_name));

      I->section_name = name;

      if (arch_spec.IsMIPS()) {
        uint32_t arch_flags = arch_spec.GetFlags();
        DataExtractor data;
        if (sheader.sh_type == SHT_MIPS_ABIFLAGS) {

          if (section_size && (data.SetData(object_data, sheader.sh_offset,
                                            section_size) == section_size)) {
            // MIPS ASE Mask is at offset 12 in MIPS.abiflags section
            lldb::offset_t offset = 12; // MIPS ABI Flags Version: 0
            arch_flags |= data.GetU32(&offset);

            // The floating point ABI is at offset 7
            offset = 7;
            switch (data.GetU8(&offset)) {
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_ANY:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_ANY;
              break;
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_DOUBLE:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_DOUBLE;
              break;
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_SINGLE:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_SINGLE;
              break;
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_SOFT:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_SOFT;
              break;
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_OLD_64:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_OLD_64;
              break;
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_XX:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_XX;
              break;
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_64:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_64;
              break;
            case llvm::Mips::Val_GNU_MIPS_ABI_FP_64A:
              arch_flags |= lldb_private::ArchSpec::eMIPS_ABI_FP_64A;
              break;
            }
          }
        }
        // Settings appropriate ArchSpec ABI Flags
        switch (header.e_flags & llvm::ELF::EF_MIPS_ABI) {
        case llvm::ELF::EF_MIPS_ABI_O32:
          arch_flags |= lldb_private::ArchSpec::eMIPSABI_O32;
          break;
        case EF_MIPS_ABI_O64:
          arch_flags |= lldb_private::ArchSpec::eMIPSABI_O64;
          break;
        case EF_MIPS_ABI_EABI32:
          arch_flags |= lldb_private::ArchSpec::eMIPSABI_EABI32;
          break;
        case EF_MIPS_ABI_EABI64:
          arch_flags |= lldb_private::ArchSpec::eMIPSABI_EABI64;
          break;
        default:
          // ABI Mask doesn't cover N32 and N64 ABI.
          if (header.e_ident[EI_CLASS] == llvm::ELF::ELFCLASS64)
            arch_flags |= lldb_private::ArchSpec::eMIPSABI_N64;
          else if (header.e_flags & llvm::ELF::EF_MIPS_ABI2)
            arch_flags |= lldb_private::ArchSpec::eMIPSABI_N32;
          break;
        }
        arch_spec.SetFlags(arch_flags);
      }

      if (arch_spec.GetMachine() == llvm::Triple::arm ||
          arch_spec.GetMachine() == llvm::Triple::thumb) {
        DataExtractor data;

        if (sheader.sh_type == SHT_ARM_ATTRIBUTES && section_size != 0 &&
            data.SetData(object_data, sheader.sh_offset, section_size) == section_size)
          ParseARMAttributes(data, section_size, arch_spec);
      }

      if (name == g_sect_name_gnu_debuglink) {
        DataExtractor data;
        if (section_size && (data.SetData(object_data, sheader.sh_offset,
                                          section_size) == section_size)) {
          lldb::offset_t gnu_debuglink_offset = 0;
          gnu_debuglink_file = data.GetCStr(&gnu_debuglink_offset);
          gnu_debuglink_offset = llvm::alignTo(gnu_debuglink_offset, 4);
          data.GetU32(&gnu_debuglink_offset, &gnu_debuglink_crc, 1);
        }
      }

      // Process ELF note section entries.
      bool is_note_header = (sheader.sh_type == SHT_NOTE);

      // The section header ".note.android.ident" is stored as a
      // PROGBITS type header but it is actually a note header.
      static ConstString g_sect_name_android_ident(".note.android.ident");
      if (!is_note_header && name == g_sect_name_android_ident)
        is_note_header = true;

      if (is_note_header) {
        // Allow notes to refine module info.
        DataExtractor data;
        if (section_size && (data.SetData(object_data, sheader.sh_offset,
                                          section_size) == section_size)) {
          Status error = RefineModuleDetailsFromNote(data, arch_spec, uuid);
          if (error.Fail()) {
            if (log)
              log->Printf("ObjectFileELF::%s ELF note processing failed: %s",
                          __FUNCTION__, error.AsCString());
          }
        }
      }
    }

    // Make any unknown triple components to be unspecified unknowns.
    if (arch_spec.GetTriple().getVendor() == llvm::Triple::UnknownVendor)
      arch_spec.GetTriple().setVendorName(llvm::StringRef());
    if (arch_spec.GetTriple().getOS() == llvm::Triple::UnknownOS)
      arch_spec.GetTriple().setOSName(llvm::StringRef());

    return section_headers.size();
  }
}

section_headers.clear();
return 0;
1702}

1704size_t ObjectFileELF::GetProgramHeaderCount() { return ParseProgramHeaders(); }

1706const elf::ELFProgramHeader *
1707ObjectFileELF::GetProgramHeaderByIndex(lldb::user_id_t id) {
if (!id || !ParseProgramHeaders())
  return NULL__null;

if (--id < m_program_headers.size())
  return &m_program_headers[id];

return NULL__null;
1715}

1717DataExtractor ObjectFileELF::GetSegmentDataByIndex(lldb::user_id_t id) {
const elf::ELFProgramHeader *segment_header = GetProgramHeaderByIndex(id);
if (segment_header == NULL__null)
  return DataExtractor();
return DataExtractor(m_data, segment_header->p_offset,
                     segment_header->p_filesz);
1723}

1725llvm::StringRef
1726ObjectFileELF::StripLinkerSymbolAnnotations(llvm::StringRef symbol_name) const {
size_t pos = symbol_name.find('@');
return symbol_name.substr(0, pos);
1729}

1731//----------------------------------------------------------------------
1732// ParseSectionHeaders
1733//----------------------------------------------------------------------
1734size_t ObjectFileELF::ParseSectionHeaders() {
return GetSectionHeaderInfo(m_section_headers, m_data, m_header, m_uuid,
                            m_gnu_debuglink_file, m_gnu_debuglink_crc,
                            m_arch_spec);
1738}

1740const ObjectFileELF::ELFSectionHeaderInfo *
1741ObjectFileELF::GetSectionHeaderByIndex(lldb::user_id_t id) {
if (!id || !ParseSectionHeaders())
  return NULL__null;

if (--id < m_section_headers.size())
  return &m_section_headers[id];

return NULL__null;
1749}

1751lldb::user_id_t ObjectFileELF::GetSectionIndexByName(const char *name) {
if (!name || !name[0] || !ParseSectionHeaders())
  return 0;
for (size_t i = 1; i < m_section_headers.size(); ++i)
  if (m_section_headers[i].section_name == ConstString(name))
    return i;
return 0;
1758}

1760void ObjectFileELF::CreateSections(SectionList &unified_section_list) {
if (!m_sections_ap.get() && ParseSectionHeaders()) {
  m_sections_ap.reset(new SectionList());

  // Object files frequently have 0 for every section address, meaning we
  // need to compute synthetic addresses in order for "file addresses" from
  // different sections to not overlap
  bool synthaddrs = (CalculateType() == ObjectFile::Type::eTypeObjectFile);
  uint64_t nextaddr = 0;

  for (SectionHeaderCollIter I = m_section_headers.begin();
       I != m_section_headers.end(); ++I) {
    const ELFSectionHeaderInfo &header = *I;

    ConstString &name = I->section_name;
    const uint64_t file_size =
        header.sh_type == SHT_NOBITS ? 0 : header.sh_size;
    const uint64_t vm_size = header.sh_flags & SHF_ALLOC ? header.sh_size : 0;

    static ConstString g_sect_name_text(".text");
    static ConstString g_sect_name_data(".data");
    static ConstString g_sect_name_bss(".bss");
    static ConstString g_sect_name_tdata(".tdata");
    static ConstString g_sect_name_tbss(".tbss");
    static ConstString g_sect_name_dwarf_debug_abbrev(".debug_abbrev");
    static ConstString g_sect_name_dwarf_debug_addr(".debug_addr");
    static ConstString g_sect_name_dwarf_debug_aranges(".debug_aranges");
    static ConstString g_sect_name_dwarf_debug_cu_index(".debug_cu_index");
    static ConstString g_sect_name_dwarf_debug_frame(".debug_frame");
    static ConstString g_sect_name_dwarf_debug_info(".debug_info");
    static ConstString g_sect_name_dwarf_debug_line(".debug_line");
    static ConstString g_sect_name_dwarf_debug_line_str(".debug_line_str");
    static ConstString g_sect_name_dwarf_debug_loc(".debug_loc");
    static ConstString g_sect_name_dwarf_debug_loclists(".debug_loclists");
    static ConstString g_sect_name_dwarf_debug_macinfo(".debug_macinfo");
    static ConstString g_sect_name_dwarf_debug_macro(".debug_macro");
    static ConstString g_sect_name_dwarf_debug_names(".debug_names");
    static ConstString g_sect_name_dwarf_debug_pubnames(".debug_pubnames");
    static ConstString g_sect_name_dwarf_debug_pubtypes(".debug_pubtypes");
    static ConstString g_sect_name_dwarf_debug_ranges(".debug_ranges");
    static ConstString g_sect_name_dwarf_debug_rnglists(".debug_rnglists");
    static ConstString g_sect_name_dwarf_debug_str(".debug_str");
    static ConstString g_sect_name_dwarf_debug_str_offsets(
        ".debug_str_offsets");
    static ConstString g_sect_name_dwarf_debug_abbrev_dwo(
        ".debug_abbrev.dwo");
    static ConstString g_sect_name_dwarf_debug_info_dwo(".debug_info.dwo");
    static ConstString g_sect_name_dwarf_debug_line_dwo(".debug_line.dwo");
    static ConstString g_sect_name_dwarf_debug_line_str_dwo(".debug_line_str.dwo");
    static ConstString g_sect_name_dwarf_debug_macro_dwo(".debug_macro.dwo");
    static ConstString g_sect_name_dwarf_debug_loc_dwo(".debug_loc.dwo");
    static ConstString g_sect_name_dwarf_debug_loclists_dwo(".debug_loclists.dwo");
    static ConstString g_sect_name_dwarf_debug_str_dwo(".debug_str.dwo");
    static ConstString g_sect_name_dwarf_debug_str_offsets_dwo(
        ".debug_str_offsets.dwo");
    static ConstString g_sect_name_dwarf_debug_types(".debug_types");
    static ConstString g_sect_name_eh_frame(".eh_frame");
    static ConstString g_sect_name_arm_exidx(".ARM.exidx");
    static ConstString g_sect_name_arm_extab(".ARM.extab");
    static ConstString g_sect_name_go_symtab(".gosymtab");
    static ConstString g_sect_name_dwarf_gnu_debugaltlink(".gnu_debugaltlink");

    SectionType sect_type = eSectionTypeOther;

    bool is_thread_specific = false;

    if (name == g_sect_name_text)
      sect_type = eSectionTypeCode;
    else if (name == g_sect_name_data)
      sect_type = eSectionTypeData;
    else if (name == g_sect_name_bss)
      sect_type = eSectionTypeZeroFill;
    else if (name == g_sect_name_tdata) {
      sect_type = eSectionTypeData;
      is_thread_specific = true;
    } else if (name == g_sect_name_tbss) {
      sect_type = eSectionTypeZeroFill;
      is_thread_specific = true;
    }
    // .debug_abbrev – Abbreviations used in the .debug_info section
    // .debug_aranges – Lookup table for mapping addresses to compilation
    // units .debug_frame – Call frame information .debug_info – The core
    // DWARF information section .debug_line – Line number information
    // .debug_loc – Location lists used in DW_AT_location attributes
    // .debug_macinfo – Macro information .debug_pubnames – Lookup table
    // for mapping object and function names to compilation units
    // .debug_pubtypes – Lookup table for mapping type names to compilation
    // units .debug_ranges – Address ranges used in DW_AT_ranges attributes
    // .debug_str – String table used in .debug_info MISSING?
    // .gnu_debugdata - "mini debuginfo / MiniDebugInfo" section,
    // http://sourceware.org/gdb/onlinedocs/gdb/MiniDebugInfo.html MISSING?
    // .debug-index - http://src.chromium.org/viewvc/chrome/trunk/src/build
    // /gdb-add-index?pathrev=144644 MISSING? .debug_types - Type
    // descriptions from DWARF 4? See
    // http://gcc.gnu.org/wiki/DwarfSeparateTypeInfo
    else if (name == g_sect_name_dwarf_debug_abbrev)
      sect_type = eSectionTypeDWARFDebugAbbrev;
    else if (name == g_sect_name_dwarf_debug_addr)
      sect_type = eSectionTypeDWARFDebugAddr;
    else if (name == g_sect_name_dwarf_debug_aranges)
      sect_type = eSectionTypeDWARFDebugAranges;
    else if (name == g_sect_name_dwarf_debug_cu_index)
      sect_type = eSectionTypeDWARFDebugCuIndex;
    else if (name == g_sect_name_dwarf_debug_frame)
      sect_type = eSectionTypeDWARFDebugFrame;
    else if (name == g_sect_name_dwarf_debug_info)
      sect_type = eSectionTypeDWARFDebugInfo;
    else if (name == g_sect_name_dwarf_debug_line)
      sect_type = eSectionTypeDWARFDebugLine;
    else if (name == g_sect_name_dwarf_debug_line_str)
      sect_type = eSectionTypeDWARFDebugLineStr;
    else if (name == g_sect_name_dwarf_debug_loc)
      sect_type = eSectionTypeDWARFDebugLoc;
    else if (name == g_sect_name_dwarf_debug_loclists)
      sect_type = eSectionTypeDWARFDebugLocLists;
    else if (name == g_sect_name_dwarf_debug_macinfo)
      sect_type = eSectionTypeDWARFDebugMacInfo;
    else if (name == g_sect_name_dwarf_debug_macro)
      sect_type = eSectionTypeDWARFDebugMacro;
    else if (name == g_sect_name_dwarf_debug_names)
      sect_type = eSectionTypeDWARFDebugNames;
    else if (name == g_sect_name_dwarf_debug_pubnames)
      sect_type = eSectionTypeDWARFDebugPubNames;
    else if (name == g_sect_name_dwarf_debug_pubtypes)
      sect_type = eSectionTypeDWARFDebugPubTypes;
    else if (name == g_sect_name_dwarf_debug_ranges)
      sect_type = eSectionTypeDWARFDebugRanges;
    else if (name == g_sect_name_dwarf_debug_rnglists)
      sect_type = eSectionTypeDWARFDebugRngLists;
    else if (name == g_sect_name_dwarf_debug_str)
      sect_type = eSectionTypeDWARFDebugStr;
    else if (name == g_sect_name_dwarf_debug_types)
      sect_type = eSectionTypeDWARFDebugTypes;
    else if (name == g_sect_name_dwarf_debug_str_offsets)
      sect_type = eSectionTypeDWARFDebugStrOffsets;
    else if (name == g_sect_name_dwarf_debug_abbrev_dwo)
      sect_type = eSectionTypeDWARFDebugAbbrev;
    else if (name == g_sect_name_dwarf_debug_info_dwo)
      sect_type = eSectionTypeDWARFDebugInfo;
    else if (name == g_sect_name_dwarf_debug_line_dwo)
      sect_type = eSectionTypeDWARFDebugLine;
    else if (name == g_sect_name_dwarf_debug_line_str_dwo)
      sect_type = eSectionTypeDWARFDebugLineStr;
    else if (name == g_sect_name_dwarf_debug_macro_dwo)
      sect_type = eSectionTypeDWARFDebugMacro;
    else if (name == g_sect_name_dwarf_debug_loc_dwo)
      sect_type = eSectionTypeDWARFDebugLoc;
    else if (name == g_sect_name_dwarf_debug_loclists_dwo)
      sect_type = eSectionTypeDWARFDebugLocLists;
    else if (name == g_sect_name_dwarf_debug_str_dwo)
      sect_type = eSectionTypeDWARFDebugStr;
    else if (name == g_sect_name_dwarf_debug_str_offsets_dwo)
      sect_type = eSectionTypeDWARFDebugStrOffsets;
    else if (name == g_sect_name_eh_frame)
      sect_type = eSectionTypeEHFrame;
    else if (name == g_sect_name_arm_exidx)
      sect_type = eSectionTypeARMexidx;
    else if (name == g_sect_name_arm_extab)
      sect_type = eSectionTypeARMextab;
    else if (name == g_sect_name_go_symtab)
      sect_type = eSectionTypeGoSymtab;
    else if (name == g_sect_name_dwarf_gnu_debugaltlink)
      sect_type = eSectionTypeDWARFGNUDebugAltLink;

    const uint32_t permissions =
        ((header.sh_flags & SHF_ALLOC) ? ePermissionsReadable : 0u) |
        ((header.sh_flags & SHF_WRITE) ? ePermissionsWritable : 0u) |
        ((header.sh_flags & SHF_EXECINSTR) ? ePermissionsExecutable : 0u);
    switch (header.sh_type) {
    case SHT_SYMTAB:
      assert(sect_type == eSectionTypeOther)((sect_type == eSectionTypeOther) ? static_cast<void> (
0) : __assert_fail ("sect_type == eSectionTypeOther", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 1930, __PRETTY_FUNCTION__));
      sect_type = eSectionTypeELFSymbolTable;
      break;
    case SHT_DYNSYM:
      assert(sect_type == eSectionTypeOther)((sect_type == eSectionTypeOther) ? static_cast<void> (
0) : __assert_fail ("sect_type == eSectionTypeOther", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 1934, __PRETTY_FUNCTION__));
      sect_type = eSectionTypeELFDynamicSymbols;
      break;
    case SHT_RELA:
    case SHT_REL:
      assert(sect_type == eSectionTypeOther)((sect_type == eSectionTypeOther) ? static_cast<void> (
0) : __assert_fail ("sect_type == eSectionTypeOther", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 1939, __PRETTY_FUNCTION__));
      sect_type = eSectionTypeELFRelocationEntries;
      break;
    case SHT_DYNAMIC:
      assert(sect_type == eSectionTypeOther)((sect_type == eSectionTypeOther) ? static_cast<void> (
0) : __assert_fail ("sect_type == eSectionTypeOther", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 1943, __PRETTY_FUNCTION__));
      sect_type = eSectionTypeELFDynamicLinkInfo;
      break;
    }

    if (eSectionTypeOther == sect_type) {
      // the kalimba toolchain assumes that ELF section names are free-form.
      // It does support linkscripts which (can) give rise to various
      // arbitrarily named sections being "Code" or "Data".
      sect_type = kalimbaSectionType(m_header, header);
    }

    // In common case ELF code section can have arbitrary name (for example,
    // we can specify it using section attribute for particular function) so
    // assume that section is a code section if it has SHF_EXECINSTR flag set
    // and has SHT_PROGBITS type.
    if (eSectionTypeOther == sect_type &&
        llvm::ELF::SHT_PROGBITS == header.sh_type &&
        (header.sh_flags & SHF_EXECINSTR)) {
      sect_type = eSectionTypeCode;
    }

    const uint32_t target_bytes_size =
        (eSectionTypeData == sect_type || eSectionTypeZeroFill == sect_type)
            ? m_arch_spec.GetDataByteSize()
            : eSectionTypeCode == sect_type ? m_arch_spec.GetCodeByteSize()
                                            : 1;
    elf::elf_xword log2align =
        (header.sh_addralign == 0) ? 0 : llvm::Log2_64(header.sh_addralign);

    uint64_t addr = header.sh_addr;

    if ((header.sh_flags & SHF_ALLOC) && synthaddrs) {
        nextaddr =
            (nextaddr + header.sh_addralign - 1) & ~(header.sh_addralign - 1);
        addr = nextaddr;
        nextaddr += vm_size;
    }

    SectionSP section_sp(new Section(
        GetModule(), // Module to which this section belongs.
        this, // ObjectFile to which this section belongs and should read
              // section data from.
        SectionIndex(I),     // Section ID.
        name,                // Section name.
        sect_type,           // Section type.
        addr,                // VM address.
        vm_size,             // VM size in bytes of this section.
        header.sh_offset,    // Offset of this section in the file.
        file_size,           // Size of the section as found in the file.
        log2align,           // Alignment of the section
        header.sh_flags,     // Flags for this section.
        target_bytes_size)); // Number of host bytes per target byte

    section_sp->SetPermissions(permissions);
    if (is_thread_specific)
      section_sp->SetIsThreadSpecific(is_thread_specific);
    m_sections_ap->AddSection(section_sp);
  }
}

// For eTypeDebugInfo files, the Symbol Vendor will take care of updating the
// unified section list.
if (GetType() != eTypeDebugInfo)
  unified_section_list = *m_sections_ap;
2008}

2010// Find the arm/aarch64 mapping symbol character in the given symbol name.
2011// Mapping symbols have the form of "$<char>[.<any>]*". Additionally we
2012// recognize cases when the mapping symbol prefixed by an arbitrary string
2013// because if a symbol prefix added to each symbol in the object file with
2014// objcopy then the mapping symbols are also prefixed.
2015static char FindArmAarch64MappingSymbol(const char *symbol_name) {
if (!symbol_name)
  return '\0';

const char *dollar_pos = ::strchr(symbol_name, '$');
if (!dollar_pos || dollar_pos[1] == '\0')
  return '\0';

if (dollar_pos[2] == '\0' || dollar_pos[2] == '.')
  return dollar_pos[1];
return '\0';
2026}

2028#define STO_MIPS_ISA(3 << 6) (3 << 6)
2029#define STO_MICROMIPS(2 << 6) (2 << 6)
2030#define IS_MICROMIPS(ST_OTHER)(((ST_OTHER)&(3 << 6)) == (2 << 6)) (((ST_OTHER)&STO_MIPS_ISA(3 << 6)) == STO_MICROMIPS(2 << 6))

2032// private
2033unsigned ObjectFileELF::ParseSymbols(Symtab *symtab, user_id_t start_id,
                                   SectionList *section_list,
                                   const size_t num_symbols,
                                   const DataExtractor &symtab_data,
                                   const DataExtractor &strtab_data) {
ELFSymbol symbol;
lldb::offset_t offset = 0;

static ConstString text_section_name(".text");
static ConstString init_section_name(".init");
static ConstString fini_section_name(".fini");
static ConstString ctors_section_name(".ctors");
static ConstString dtors_section_name(".dtors");

static ConstString data_section_name(".data");
static ConstString rodata_section_name(".rodata");
static ConstString rodata1_section_name(".rodata1");
static ConstString data2_section_name(".data1");
static ConstString bss_section_name(".bss");
static ConstString opd_section_name(".opd"); // For ppc64

// On Android the oatdata and the oatexec symbols in the oat and odex files
// covers the full .text section what causes issues with displaying unusable
// symbol name to the user and very slow unwinding speed because the
// instruction emulation based unwind plans try to emulate all instructions
// in these symbols. Don't add these symbols to the symbol list as they have
// no use for the debugger and they are causing a lot of trouble. Filtering
// can't be restricted to Android because this special object file don't
// contain the note section specifying the environment to Android but the
// custom extension and file name makes it highly unlikely that this will
// collide with anything else.
ConstString file_extension = m_file.GetFileNameExtension();
bool skip_oatdata_oatexec = file_extension == ConstString(".oat") ||
                            file_extension == ConstString(".odex");

ArchSpec arch;
GetArchitecture(arch);
ModuleSP module_sp(GetModule());
SectionList *module_section_list =
    module_sp ? module_sp->GetSectionList() : nullptr;

// Local cache to avoid doing a FindSectionByName for each symbol. The "const
// char*" key must came from a ConstString object so they can be compared by
// pointer
std::unordered_map<const char *, lldb::SectionSP> section_name_to_section;

unsigned i;
for (i = 0; i < num_symbols; ++i) {
  if (symbol.Parse(symtab_data, &offset) == false)
    break;

  const char *symbol_name = strtab_data.PeekCStr(symbol.st_name);
  if (!symbol_name)
    symbol_name = "";

  // No need to add non-section symbols that have no names
  if (symbol.getType() != STT_SECTION &&
      (symbol_name == nullptr || symbol_name[0] == '\0'))
    continue;

  // Skipping oatdata and oatexec sections if it is requested. See details
  // above the definition of skip_oatdata_oatexec for the reasons.
  if (skip_oatdata_oatexec && (::strcmp(symbol_name, "oatdata") == 0 ||
                               ::strcmp(symbol_name, "oatexec") == 0))
    continue;

  SectionSP symbol_section_sp;
  SymbolType symbol_type = eSymbolTypeInvalid;
  Elf64_Half section_idx = symbol.st_shndx;

  switch (section_idx) {
  case SHN_ABS:
    symbol_type = eSymbolTypeAbsolute;
    break;
  case SHN_UNDEF:
    symbol_type = eSymbolTypeUndefined;
    break;
  default:
    symbol_section_sp = section_list->GetSectionAtIndex(section_idx);
    break;
  }

  // If a symbol is undefined do not process it further even if it has a STT
  // type
  if (symbol_type != eSymbolTypeUndefined) {
    switch (symbol.getType()) {
    default:
    case STT_NOTYPE:
      // The symbol's type is not specified.
      break;

    case STT_OBJECT:
      // The symbol is associated with a data object, such as a variable, an
      // array, etc.
      symbol_type = eSymbolTypeData;
      break;

    case STT_FUNC:
      // The symbol is associated with a function or other executable code.
      symbol_type = eSymbolTypeCode;
      break;

    case STT_SECTION:
      // The symbol is associated with a section. Symbol table entries of
      // this type exist primarily for relocation and normally have STB_LOCAL
      // binding.
      break;

    case STT_FILE:
      // Conventionally, the symbol's name gives the name of the source file
      // associated with the object file. A file symbol has STB_LOCAL
      // binding, its section index is SHN_ABS, and it precedes the other
      // STB_LOCAL symbols for the file, if it is present.
      symbol_type = eSymbolTypeSourceFile;
      break;

    case STT_GNU_IFUNC:
      // The symbol is associated with an indirect function. The actual
      // function will be resolved if it is referenced.
      symbol_type = eSymbolTypeResolver;
      break;
    }
  }

  if (symbol_type == eSymbolTypeInvalid && symbol.getType() != STT_SECTION) {
    if (symbol_section_sp) {
      const ConstString &sect_name = symbol_section_sp->GetName();
      if (sect_name == text_section_name || sect_name == init_section_name ||
          sect_name == fini_section_name || sect_name == ctors_section_name ||
          sect_name == dtors_section_name) {
        symbol_type = eSymbolTypeCode;
      } else if (sect_name == data_section_name ||
                 sect_name == data2_section_name ||
                 sect_name == rodata_section_name ||
                 sect_name == rodata1_section_name ||
                 sect_name == bss_section_name) {
        symbol_type = eSymbolTypeData;
      }
    }
  }

  int64_t symbol_value_offset = 0;
  uint32_t additional_flags = 0;

  if (arch.IsValid()) {
    if (arch.GetMachine() == llvm::Triple::arm) {
      if (symbol.getBinding() == STB_LOCAL) {
        char mapping_symbol = FindArmAarch64MappingSymbol(symbol_name);
        if (symbol_type == eSymbolTypeCode) {
          switch (mapping_symbol) {
          case 'a':
            // $a[.<any>]* - marks an ARM instruction sequence
            m_address_class_map[symbol.st_value] = AddressClass::eCode;
            break;
          case 'b':
          case 't':
            // $b[.<any>]* - marks a THUMB BL instruction sequence
            // $t[.<any>]* - marks a THUMB instruction sequence
            m_address_class_map[symbol.st_value] =
                AddressClass::eCodeAlternateISA;
            break;
          case 'd':
            // $d[.<any>]* - marks a data item sequence (e.g. lit pool)
            m_address_class_map[symbol.st_value] = AddressClass::eData;
            break;
          }
        }
        if (mapping_symbol)
          continue;
      }
    } else if (arch.GetMachine() == llvm::Triple::aarch64) {
      if (symbol.getBinding() == STB_LOCAL) {
        char mapping_symbol = FindArmAarch64MappingSymbol(symbol_name);
        if (symbol_type == eSymbolTypeCode) {
          switch (mapping_symbol) {
          case 'x':
            // $x[.<any>]* - marks an A64 instruction sequence
            m_address_class_map[symbol.st_value] = AddressClass::eCode;
            break;
          case 'd':
            // $d[.<any>]* - marks a data item sequence (e.g. lit pool)
            m_address_class_map[symbol.st_value] = AddressClass::eData;
            break;
          }
        }
        if (mapping_symbol)
          continue;
      }
    }

    if (arch.GetMachine() == llvm::Triple::arm) {
      if (symbol_type == eSymbolTypeCode) {
        if (symbol.st_value & 1) {
          // Subtracting 1 from the address effectively unsets the low order
          // bit, which results in the address actually pointing to the
          // beginning of the symbol. This delta will be used below in
          // conjunction with symbol.st_value to produce the final
          // symbol_value that we store in the symtab.
          symbol_value_offset = -1;
          m_address_class_map[symbol.st_value ^ 1] =
              AddressClass::eCodeAlternateISA;
        } else {
          // This address is ARM
          m_address_class_map[symbol.st_value] = AddressClass::eCode;
        }
      }
    }

    /*
     * MIPS:
     * The bit #0 of an address is used for ISA mode (1 for microMIPS, 0 for
     * MIPS).
     * This allows processor to switch between microMIPS and MIPS without any
     * need
     * for special mode-control register. However, apart from .debug_line,
     * none of
     * the ELF/DWARF sections set the ISA bit (for symbol or section). Use
     * st_other
     * flag to check whether the symbol is microMIPS and then set the address
     * class
     * accordingly.
    */
    const llvm::Triple::ArchType llvm_arch = arch.GetMachine();
    if (llvm_arch == llvm::Triple::mips ||
        llvm_arch == llvm::Triple::mipsel ||
        llvm_arch == llvm::Triple::mips64 ||
        llvm_arch == llvm::Triple::mips64el) {
      if (IS_MICROMIPS(symbol.st_other)(((symbol.st_other)&(3 << 6)) == (2 << 6)))
        m_address_class_map[symbol.st_value] = AddressClass::eCodeAlternateISA;
      else if ((symbol.st_value & 1) && (symbol_type == eSymbolTypeCode)) {
        symbol.st_value = symbol.st_value & (~1ull);
        m_address_class_map[symbol.st_value] = AddressClass::eCodeAlternateISA;
      } else {
        if (symbol_type == eSymbolTypeCode)
          m_address_class_map[symbol.st_value] = AddressClass::eCode;
        else if (symbol_type == eSymbolTypeData)
          m_address_class_map[symbol.st_value] = AddressClass::eData;
        else
          m_address_class_map[symbol.st_value] = AddressClass::eUnknown;
      }
    }
  }

  // symbol_value_offset may contain 0 for ARM symbols or -1 for THUMB
  // symbols. See above for more details.
  uint64_t symbol_value = symbol.st_value + symbol_value_offset;

  if (symbol_section_sp == nullptr && section_idx == SHN_ABS &&
      symbol.st_size != 0) {
    // We don't have a section for a symbol with non-zero size. Create a new
    // section for it so the address range covered by the symbol is also
    // covered by the module (represented through the section list). It is
    // needed so module lookup for the addresses covered by this symbol will
    // be successfull. This case happens for absolute symbols.
    ConstString fake_section_name(std::string(".absolute.") + symbol_name);
    symbol_section_sp =
        std::make_shared<Section>(module_sp, this, SHN_ABS, fake_section_name,
                                  eSectionTypeAbsoluteAddress, symbol_value,
                                  symbol.st_size, 0, 0, 0, SHF_ALLOC);

    module_section_list->AddSection(symbol_section_sp);
    section_list->AddSection(symbol_section_sp);
  }

  if (symbol_section_sp &&
      CalculateType() != ObjectFile::Type::eTypeObjectFile)
    symbol_value -= symbol_section_sp->GetFileAddress();

  if (symbol_section_sp && module_section_list &&
      module_section_list != section_list) {
    const ConstString &sect_name = symbol_section_sp->GetName();
    auto section_it = section_name_to_section.find(sect_name.GetCString());
    if (section_it == section_name_to_section.end())
      section_it =
          section_name_to_section
              .emplace(sect_name.GetCString(),
                       module_section_list->FindSectionByName(sect_name))
              .first;
    if (section_it->second)
      symbol_section_sp = section_it->second;
  }

  bool is_global = symbol.getBinding() == STB_GLOBAL;
  uint32_t flags = symbol.st_other << 8 | symbol.st_info | additional_flags;
  bool is_mangled = (symbol_name[0] == '_' && symbol_name[1] == 'Z');

  llvm::StringRef symbol_ref(symbol_name);

  // Symbol names may contain @VERSION suffixes. Find those and strip them
  // temporarily.
  size_t version_pos = symbol_ref.find('@');
  bool has_suffix = version_pos != llvm::StringRef::npos;
  llvm::StringRef symbol_bare = symbol_ref.substr(0, version_pos);
  Mangled mangled(ConstString(symbol_bare), is_mangled);

  // Now append the suffix back to mangled and unmangled names. Only do it if
  // the demangling was successful (string is not empty).
  if (has_suffix) {
    llvm::StringRef suffix = symbol_ref.substr(version_pos);

    llvm::StringRef mangled_name = mangled.GetMangledName().GetStringRef();
    if (!mangled_name.empty())
      mangled.SetMangledName(ConstString((mangled_name + suffix).str()));

    ConstString demangled =
        mangled.GetDemangledName(lldb::eLanguageTypeUnknown);
    llvm::StringRef demangled_name = demangled.GetStringRef();
    if (!demangled_name.empty())
      mangled.SetDemangledName(ConstString((demangled_name + suffix).str()));
  }

  // In ELF all symbol should have a valid size but it is not true for some
  // function symbols coming from hand written assembly. As none of the
  // function symbol should have 0 size we try to calculate the size for
  // these symbols in the symtab with saying that their original size is not
  // valid.
  bool symbol_size_valid =
      symbol.st_size != 0 || symbol.getType() != STT_FUNC;

  Symbol dc_symbol(
      i + start_id, // ID is the original symbol table index.
      mangled,
      symbol_type,                    // Type of this symbol
      is_global,                      // Is this globally visible?
      false,                          // Is this symbol debug info?
      false,                          // Is this symbol a trampoline?
      false,                          // Is this symbol artificial?
      AddressRange(symbol_section_sp, // Section in which this symbol is
                                      // defined or null.
                   symbol_value,      // Offset in section or symbol value.
                   symbol.st_size),   // Size in bytes of this symbol.
      symbol_size_valid,              // Symbol size is valid
      has_suffix,                     // Contains linker annotations?
      flags);                         // Symbol flags.
  symtab->AddSymbol(dc_symbol);
}
return i;
2370}

2372unsigned ObjectFileELF::ParseSymbolTable(Symtab *symbol_table,
                                       user_id_t start_id,
                                       lldb_private::Section *symtab) {
if (symtab->GetObjectFile() != this) {
  // If the symbol table section is owned by a different object file, have it
  // do the parsing.
  ObjectFileELF *obj_file_elf =
      static_cast<ObjectFileELF *>(symtab->GetObjectFile());
  return obj_file_elf->ParseSymbolTable(symbol_table, start_id, symtab);
}

// Get section list for this object file.
SectionList *section_list = m_sections_ap.get();
if (!section_list)
  return 0;

user_id_t symtab_id = symtab->GetID();
const ELFSectionHeaderInfo *symtab_hdr = GetSectionHeaderByIndex(symtab_id);
assert(symtab_hdr->sh_type == SHT_SYMTAB ||((symtab_hdr->sh_type == SHT_SYMTAB || symtab_hdr->sh_type
 == SHT_DYNSYM) ? static_cast<void> (0) : __assert_fail
 ("symtab_hdr->sh_type == SHT_SYMTAB || symtab_hdr->sh_type == SHT_DYNSYM"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2391, __PRETTY_FUNCTION__))
       symtab_hdr->sh_type == SHT_DYNSYM)((symtab_hdr->sh_type == SHT_SYMTAB || symtab_hdr->sh_type
 == SHT_DYNSYM) ? static_cast<void> (0) : __assert_fail
 ("symtab_hdr->sh_type == SHT_SYMTAB || symtab_hdr->sh_type == SHT_DYNSYM"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2391, __PRETTY_FUNCTION__));

// sh_link: section header index of associated string table. Section ID's are
// ones based.
user_id_t strtab_id = symtab_hdr->sh_link + 1;
Section *strtab = section_list->FindSectionByID(strtab_id).get();

if (symtab && strtab) {
  assert(symtab->GetObjectFile() == this)((symtab->GetObjectFile() == this) ? static_cast<void>
 (0) : __assert_fail ("symtab->GetObjectFile() == this", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2399, __PRETTY_FUNCTION__));
  assert(strtab->GetObjectFile() == this)((strtab->GetObjectFile() == this) ? static_cast<void>
 (0) : __assert_fail ("strtab->GetObjectFile() == this", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2400, __PRETTY_FUNCTION__));

  DataExtractor symtab_data;
  DataExtractor strtab_data;
  if (ReadSectionData(symtab, symtab_data) &&
      ReadSectionData(strtab, strtab_data)) {
    size_t num_symbols = symtab_data.GetByteSize() / symtab_hdr->sh_entsize;

    return ParseSymbols(symbol_table, start_id, section_list, num_symbols,
                        symtab_data, strtab_data);
  }
}

return 0;
2414}

2416size_t ObjectFileELF::ParseDynamicSymbols() {
if (m_dynamic_symbols.size())
  return m_dynamic_symbols.size();

SectionList *section_list = GetSectionList();
if (!section_list)
  return 0;

// Find the SHT_DYNAMIC section.
Section *dynsym =
    section_list->FindSectionByType(eSectionTypeELFDynamicLinkInfo, true)
        .get();
if (!dynsym)
  return 0;
assert(dynsym->GetObjectFile() == this)((dynsym->GetObjectFile() == this) ? static_cast<void>
 (0) : __assert_fail ("dynsym->GetObjectFile() == this", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2430, __PRETTY_FUNCTION__));

ELFDynamic symbol;
DataExtractor dynsym_data;
if (ReadSectionData(dynsym, dynsym_data)) {
  const lldb::offset_t section_size = dynsym_data.GetByteSize();
  lldb::offset_t cursor = 0;

  while (cursor < section_size) {
    if (!symbol.Parse(dynsym_data, &cursor))
      break;

    m_dynamic_symbols.push_back(symbol);
  }
}

return m_dynamic_symbols.size();
2447}

2449const ELFDynamic *ObjectFileELF::FindDynamicSymbol(unsigned tag) {
if (!ParseDynamicSymbols())
  return NULL__null;

DynamicSymbolCollIter I = m_dynamic_symbols.begin();
DynamicSymbolCollIter E = m_dynamic_symbols.end();
for (; I != E; ++I) {
  ELFDynamic *symbol = &*I;

  if (symbol->d_tag == tag)
    return symbol;
}

return NULL__null;
2463}

2465unsigned ObjectFileELF::PLTRelocationType() {
// DT_PLTREL
//  This member specifies the type of relocation entry to which the
//  procedure linkage table refers. The d_val member holds DT_REL or
//  DT_RELA, as appropriate. All relocations in a procedure linkage table
//  must use the same relocation.
const ELFDynamic *symbol = FindDynamicSymbol(DT_PLTREL);

if (symbol)
  return symbol->d_val;

return 0;
2477}

2479// Returns the size of the normal plt entries and the offset of the first
2480// normal plt entry. The 0th entry in the plt table is usually a resolution
2481// entry which have different size in some architectures then the rest of the
2482// plt entries.
2483static std::pair<uint64_t, uint64_t>
2484GetPltEntrySizeAndOffset(const ELFSectionHeader *rel_hdr,
                       const ELFSectionHeader *plt_hdr) {
const elf_xword num_relocations = rel_hdr->sh_size / rel_hdr->sh_entsize;

// Clang 3.3 sets entsize to 4 for 32-bit binaries, but the plt entries are
// 16 bytes. So round the entsize up by the alignment if addralign is set.
elf_xword plt_entsize =
    plt_hdr->sh_addralign
        ? llvm::alignTo(plt_hdr->sh_entsize, plt_hdr->sh_addralign)
        : plt_hdr->sh_entsize;

// Some linkers e.g ld for arm, fill plt_hdr->sh_entsize field incorrectly.
// PLT entries relocation code in general requires multiple instruction and
// should be greater than 4 bytes in most cases. Try to guess correct size
// just in case.
if (plt_entsize <= 4) {
  // The linker haven't set the plt_hdr->sh_entsize field. Try to guess the
  // size of the plt entries based on the number of entries and the size of
  // the plt section with the assumption that the size of the 0th entry is at
  // least as big as the size of the normal entries and it isn't much bigger
  // then that.
  if (plt_hdr->sh_addralign)
    plt_entsize = plt_hdr->sh_size / plt_hdr->sh_addralign /
                  (num_relocations + 1) * plt_hdr->sh_addralign;
  else
    plt_entsize = plt_hdr->sh_size / (num_relocations + 1);
}

elf_xword plt_offset = plt_hdr->sh_size - num_relocations * plt_entsize;

return std::make_pair(plt_entsize, plt_offset);
2515}

2517static unsigned ParsePLTRelocations(
  Symtab *symbol_table, user_id_t start_id, unsigned rel_type,
  const ELFHeader *hdr, const ELFSectionHeader *rel_hdr,
  const ELFSectionHeader *plt_hdr, const ELFSectionHeader *sym_hdr,
  const lldb::SectionSP &plt_section_sp, DataExtractor &rel_data,
  DataExtractor &symtab_data, DataExtractor &strtab_data) {
ELFRelocation rel(rel_type);
ELFSymbol symbol;
lldb::offset_t offset = 0;

uint64_t plt_offset, plt_entsize;
std::tie(plt_entsize, plt_offset) =
    GetPltEntrySizeAndOffset(rel_hdr, plt_hdr);
const elf_xword num_relocations = rel_hdr->sh_size / rel_hdr->sh_entsize;

typedef unsigned (*reloc_info_fn)(const ELFRelocation &rel);
reloc_info_fn reloc_type;
reloc_info_fn reloc_symbol;

if (hdr->Is32Bit()) {
  reloc_type = ELFRelocation::RelocType32;
  reloc_symbol = ELFRelocation::RelocSymbol32;
} else {
  reloc_type = ELFRelocation::RelocType64;
  reloc_symbol = ELFRelocation::RelocSymbol64;
}

unsigned slot_type = hdr->GetRelocationJumpSlotType();
unsigned i;
for (i = 0; i < num_relocations; ++i) {
  if (rel.Parse(rel_data, &offset) == false)
    break;

  if (reloc_type(rel) != slot_type)
    continue;

  lldb::offset_t symbol_offset = reloc_symbol(rel) * sym_hdr->sh_entsize;
  if (!symbol.Parse(symtab_data, &symbol_offset))
    break;

  const char *symbol_name = strtab_data.PeekCStr(symbol.st_name);
  bool is_mangled =
      symbol_name ? (symbol_name[0] == '_' && symbol_name[1] == 'Z') : false;
  uint64_t plt_index = plt_offset + i * plt_entsize;

  Symbol jump_symbol(
      i + start_id,          // Symbol table index
      symbol_name,           // symbol name.
      is_mangled,            // is the symbol name mangled?
      eSymbolTypeTrampoline, // Type of this symbol
      false,                 // Is this globally visible?
      false,                 // Is this symbol debug info?
      true,                  // Is this symbol a trampoline?
      true,                  // Is this symbol artificial?
      plt_section_sp, // Section in which this symbol is defined or null.
      plt_index,      // Offset in section or symbol value.
      plt_entsize,    // Size in bytes of this symbol.
      true,           // Size is valid
      false,          // Contains linker annotations?
      0);             // Symbol flags.

  symbol_table->AddSymbol(jump_symbol);
}

return i;
2582}

2584unsigned
2585ObjectFileELF::ParseTrampolineSymbols(Symtab *symbol_table, user_id_t start_id,
                                    const ELFSectionHeaderInfo *rel_hdr,
                                    user_id_t rel_id) {
assert(rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL)((rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL
) ? static_cast<void> (0) : __assert_fail ("rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2588, __PRETTY_FUNCTION__));

// The link field points to the associated symbol table.
user_id_t symtab_id = rel_hdr->sh_link;

// If the link field doesn't point to the appropriate symbol name table then
// try to find it by name as some compiler don't fill in the link fields.
if (!symtab_id)
  symtab_id = GetSectionIndexByName(".dynsym");

// Get PLT section.  We cannot use rel_hdr->sh_info, since current linkers
// point that to the .got.plt or .got section instead of .plt.
user_id_t plt_id = GetSectionIndexByName(".plt");

if (!symtab_id || !plt_id)
  return 0;

// Section ID's are ones based;
symtab_id++;
plt_id++;

const ELFSectionHeaderInfo *plt_hdr = GetSectionHeaderByIndex(plt_id);
if (!plt_hdr)
  return 0;

const ELFSectionHeaderInfo *sym_hdr = GetSectionHeaderByIndex(symtab_id);
if (!sym_hdr)
  return 0;

SectionList *section_list = m_sections_ap.get();
if (!section_list)
  return 0;

Section *rel_section = section_list->FindSectionByID(rel_id).get();
if (!rel_section)
  return 0;

SectionSP plt_section_sp(section_list->FindSectionByID(plt_id));
if (!plt_section_sp)
  return 0;

Section *symtab = section_list->FindSectionByID(symtab_id).get();
if (!symtab)
  return 0;

// sh_link points to associated string table.
Section *strtab = section_list->FindSectionByID(sym_hdr->sh_link + 1).get();
if (!strtab)
  return 0;

DataExtractor rel_data;
if (!ReadSectionData(rel_section, rel_data))
  return 0;

DataExtractor symtab_data;
if (!ReadSectionData(symtab, symtab_data))
  return 0;

DataExtractor strtab_data;
if (!ReadSectionData(strtab, strtab_data))
  return 0;

unsigned rel_type = PLTRelocationType();
if (!rel_type)
  return 0;

return ParsePLTRelocations(symbol_table, start_id, rel_type, &m_header,
                           rel_hdr, plt_hdr, sym_hdr, plt_section_sp,
                           rel_data, symtab_data, strtab_data);
2657}

2659unsigned ObjectFileELF::ApplyRelocations(
  Symtab *symtab, const ELFHeader *hdr, const ELFSectionHeader *rel_hdr,
  const ELFSectionHeader *symtab_hdr, const ELFSectionHeader *debug_hdr,
  DataExtractor &rel_data, DataExtractor &symtab_data,
  DataExtractor &debug_data, Section *rel_section) {
ELFRelocation rel(rel_hdr->sh_type);
26
←
Calling constructor for 'ELFRelocation'→
lldb::addr_t offset = 0;
const unsigned num_relocations = rel_hdr->sh_size / rel_hdr->sh_entsize;
typedef unsigned (*reloc_info_fn)(const ELFRelocation &rel);
reloc_info_fn reloc_type;
reloc_info_fn reloc_symbol;

if (hdr->Is32Bit()) {
  reloc_type = ELFRelocation::RelocType32;
  reloc_symbol = ELFRelocation::RelocSymbol32;
} else {
  reloc_type = ELFRelocation::RelocType64;
  reloc_symbol = ELFRelocation::RelocSymbol64;
}

for (unsigned i = 0; i < num_relocations; ++i) {
  if (rel.Parse(rel_data, &offset) == false)
    break;

  Symbol *symbol = NULL__null;

  if (hdr->Is32Bit()) {
    switch (reloc_type(rel)) {
    case R_386_32:
    case R_386_PC32:
    default:
      // FIXME: This asserts with this input:
      //
      // foo.cpp
      // int main(int argc, char **argv) { return 0; }
      //
      // clang++.exe --target=i686-unknown-linux-gnu -g -c foo.cpp -o foo.o
      //
      // and running this on the foo.o module.
      assert(false && "unexpected relocation type")((false && "unexpected relocation type") ? static_cast
<void> (0) : __assert_fail ("false && \"unexpected relocation type\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2698, __PRETTY_FUNCTION__));
    }
  } else {
    switch (reloc_type(rel)) {
    case R_X86_64_64: {
      symbol = symtab->FindSymbolByID(reloc_symbol(rel));
      if (symbol) {
        addr_t value = symbol->GetAddressRef().GetFileAddress();
        DataBufferSP &data_buffer_sp = debug_data.GetSharedDataBuffer();
        uint64_t *dst = reinterpret_cast<uint64_t *>(
            data_buffer_sp->GetBytes() + rel_section->GetFileOffset() +
            ELFRelocation::RelocOffset64(rel));
        *dst = value + ELFRelocation::RelocAddend64(rel);
      }
      break;
    }
    case R_X86_64_32:
    case R_X86_64_32S:
    case R_AARCH64_ABS32: {
      symbol = symtab->FindSymbolByID(reloc_symbol(rel));
      if (symbol) {
        addr_t value = symbol->GetAddressRef().GetFileAddress();
        value += ELFRelocation::RelocAddend32(rel);
        if ((reloc_type(rel) == R_X86_64_32 && (value <= UINT32_MAX(4294967295U))) ||
            (reloc_type(rel) == R_X86_64_32S &&
             ((int64_t)value <= INT32_MAX(2147483647) && (int64_t)value >= INT32_MIN(-2147483647-1))) ||
            (reloc_type(rel) == R_AARCH64_ABS32 && (value <= UINT32_MAX(4294967295U)))) {
          Log *log =
              lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_MODULES(1u << 21));
          log->Printf("Failed to apply debug info relocations");
        }
        uint32_t truncated_addr = (value & 0xFFFFFFFF);
        DataBufferSP &data_buffer_sp = debug_data.GetSharedDataBuffer();
        uint32_t *dst = reinterpret_cast<uint32_t *>(
            data_buffer_sp->GetBytes() + rel_section->GetFileOffset() +
            ELFRelocation::RelocOffset32(rel));
        *dst = truncated_addr;
      }
      break;
    }
    case R_X86_64_PC32:
    default:
      assert(false && "unexpected relocation type")((false && "unexpected relocation type") ? static_cast
<void> (0) : __assert_fail ("false && \"unexpected relocation type\""
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2740, __PRETTY_FUNCTION__));
    }
  }
}

return 0;
2746}

2748unsigned ObjectFileELF::RelocateDebugSections(const ELFSectionHeader *rel_hdr,
                                            user_id_t rel_id,
                                            lldb_private::Symtab *thetab) {
assert(rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL)((rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL
) ? static_cast<void> (0) : __assert_fail ("rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL"
, "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2751, __PRETTY_FUNCTION__));

// Parse in the section list if needed.
SectionList *section_list = GetSectionList();
if (!section_list)
11
←
Assuming 'section_list' is non-null→
12
←
Taking false branch→
  return 0;

// Section ID's are ones based.
user_id_t symtab_id = rel_hdr->sh_link + 1;
user_id_t debug_id = rel_hdr->sh_info + 1;

const ELFSectionHeader *symtab_hdr = GetSectionHeaderByIndex(symtab_id);
if (!symtab_hdr)
13
←
Taking false branch→
  return 0;

const ELFSectionHeader *debug_hdr = GetSectionHeaderByIndex(debug_id);
if (!debug_hdr)
14
←
Taking false branch→
  return 0;

Section *rel = section_list->FindSectionByID(rel_id).get();
if (!rel)
15
←
Assuming 'rel' is non-null→
16
←
Taking false branch→
  return 0;

Section *symtab = section_list->FindSectionByID(symtab_id).get();
if (!symtab)
17
←
Assuming 'symtab' is non-null→
18
←
Taking false branch→
  return 0;

Section *debug = section_list->FindSectionByID(debug_id).get();
if (!debug)
19
←
Assuming 'debug' is non-null→
20
←
Taking false branch→
  return 0;

DataExtractor rel_data;
DataExtractor symtab_data;
DataExtractor debug_data;

if (GetData(rel->GetFileOffset(), rel->GetFileSize(), rel_data) &&
21
←
Assuming the condition is true→
24
←
Taking true branch→
    GetData(symtab->GetFileOffset(), symtab->GetFileSize(), symtab_data) &&
22
←
Assuming the condition is true→
    GetData(debug->GetFileOffset(), debug->GetFileSize(), debug_data)) {
23
←
Assuming the condition is true→
  ApplyRelocations(thetab, &m_header, rel_hdr, symtab_hdr, debug_hdr,
25
←
Calling 'ObjectFileELF::ApplyRelocations'→
                   rel_data, symtab_data, debug_data, debug);
}

return 0;
2794}

2796Symtab *ObjectFileELF::GetSymtab() {
ModuleSP module_sp(GetModule());
if (!module_sp)
  return NULL__null;

// We always want to use the main object file so we (hopefully) only have one
// cached copy of our symtab, dynamic sections, etc.
ObjectFile *module_obj_file = module_sp->GetObjectFile();
if (module_obj_file && module_obj_file != this)
  return module_obj_file->GetSymtab();

if (m_symtab_ap.get() == NULL__null) {
  SectionList *section_list = module_sp->GetSectionList();
  if (!section_list)
    return NULL__null;

  uint64_t symbol_id = 0;
  std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());

  // Sharable objects and dynamic executables usually have 2 distinct symbol
  // tables, one named ".symtab", and the other ".dynsym". The dynsym is a
  // smaller version of the symtab that only contains global symbols. The
  // information found in the dynsym is therefore also found in the symtab,
  // while the reverse is not necessarily true.
  Section *symtab =
      section_list->FindSectionByType(eSectionTypeELFSymbolTable, true).get();
  if (!symtab) {
    // The symtab section is non-allocable and can be stripped, so if it
    // doesn't exist then use the dynsym section which should always be
    // there.
    symtab =
        section_list->FindSectionByType(eSectionTypeELFDynamicSymbols, true)
            .get();
  }
  if (symtab) {
    m_symtab_ap.reset(new Symtab(symtab->GetObjectFile()));
    symbol_id += ParseSymbolTable(m_symtab_ap.get(), symbol_id, symtab);
  }

  // DT_JMPREL
  //      If present, this entry's d_ptr member holds the address of
  //      relocation
  //      entries associated solely with the procedure linkage table.
  //      Separating
  //      these relocation entries lets the dynamic linker ignore them during
  //      process initialization, if lazy binding is enabled. If this entry is
  //      present, the related entries of types DT_PLTRELSZ and DT_PLTREL must
  //      also be present.
  const ELFDynamic *symbol = FindDynamicSymbol(DT_JMPREL);
  if (symbol) {
    // Synthesize trampoline symbols to help navigate the PLT.
    addr_t addr = symbol->d_ptr;
    Section *reloc_section =
        section_list->FindSectionContainingFileAddress(addr).get();
    if (reloc_section) {
      user_id_t reloc_id = reloc_section->GetID();
      const ELFSectionHeaderInfo *reloc_header =
          GetSectionHeaderByIndex(reloc_id);
      assert(reloc_header)((reloc_header) ? static_cast<void> (0) : __assert_fail
 ("reloc_header", "/build/llvm-toolchain-snapshot-8~svn345461/tools/lldb/source/Plugins/ObjectFile/ELF/ObjectFileELF.cpp"
, 2854, __PRETTY_FUNCTION__));

      if (m_symtab_ap == nullptr)
        m_symtab_ap.reset(new Symtab(reloc_section->GetObjectFile()));

      ParseTrampolineSymbols(m_symtab_ap.get(), symbol_id, reloc_header,
                             reloc_id);
    }
  }

  DWARFCallFrameInfo *eh_frame = GetUnwindTable().GetEHFrameInfo();
  if (eh_frame) {
    if (m_symtab_ap == nullptr)
      m_symtab_ap.reset(new Symtab(this));
    ParseUnwindSymbols(m_symtab_ap.get(), eh_frame);
  }

  // If we still don't have any symtab then create an empty instance to avoid
  // do the section lookup next time.
  if (m_symtab_ap == nullptr)
    m_symtab_ap.reset(new Symtab(this));

  m_symtab_ap->CalculateSymbolSizes();
}

return m_symtab_ap.get();
2880}

2882void ObjectFileELF::RelocateSection(lldb_private::Section *section)
2883{
static const char *debug_prefix = ".debug";

// Set relocated bit so we stop getting called, regardless of whether we
// actually relocate.
section->SetIsRelocated(true);

// We only relocate in ELF relocatable files
if (CalculateType() != eTypeObjectFile)
1
Assuming the condition is false→
2
←
Taking false branch→
  return;

const char *section_name = section->GetName().GetCString();
// Can't relocate that which can't be named
if (section_name == nullptr)
3
←
Assuming the condition is false→
4
←
Taking false branch→
  return;

// We don't relocate non-debug sections at the moment
if (strncmp(section_name, debug_prefix, strlen(debug_prefix)))
5
←
Taking false branch→
  return;

// Relocation section names to look for
std::string needle = std::string(".rel") + section_name;
std::string needlea = std::string(".rela") + section_name;

for (SectionHeaderCollIter I = m_section_headers.begin();
6
←
Loop condition is true.  Entering loop body→
     I != m_section_headers.end(); ++I) {
  if (I->sh_type == SHT_RELA || I->sh_type == SHT_REL) {
7
←
Assuming the condition is true→
    const char *hay_name = I->section_name.GetCString();
    if (hay_name == nullptr)
8
←
Assuming the condition is false→
9
←
Taking false branch→
      continue;
    if (needle == hay_name || needlea == hay_name) {
      const ELFSectionHeader &reloc_header = *I;
      user_id_t reloc_id = SectionIndex(I);
      RelocateDebugSections(&reloc_header, reloc_id, GetSymtab());
10
←
Calling 'ObjectFileELF::RelocateDebugSections'→
      break;
    }
  }
}
2921}

2923void ObjectFileELF::ParseUnwindSymbols(Symtab *symbol_table,
                                     DWARFCallFrameInfo *eh_frame) {
SectionList *section_list = GetSectionList();
if (!section_list)
  return;

// First we save the new symbols into a separate list and add them to the
// symbol table after we colleced all symbols we want to add. This is
// neccessary because adding a new symbol invalidates the internal index of
// the symtab what causing the next lookup to be slow because it have to
// recalculate the index first.
std::vector<Symbol> new_symbols;

eh_frame->ForEachFDEEntries([this, symbol_table, section_list, &new_symbols](
    lldb::addr_t file_addr, uint32_t size, dw_offset_t) {
  Symbol *symbol = symbol_table->FindSymbolAtFileAddress(file_addr);
  if (symbol) {
    if (!symbol->GetByteSizeIsValid()) {
      symbol->SetByteSize(size);
      symbol->SetSizeIsSynthesized(true);
    }
  } else {
    SectionSP section_sp =
        section_list->FindSectionContainingFileAddress(file_addr);
    if (section_sp) {
      addr_t offset = file_addr - section_sp->GetFileAddress();
      const char *symbol_name = GetNextSyntheticSymbolName().GetCString();
      uint64_t symbol_id = symbol_table->GetNumSymbols();
      Symbol eh_symbol(
          symbol_id,       // Symbol table index.
          symbol_name,     // Symbol name.
          false,           // Is the symbol name mangled?
          eSymbolTypeCode, // Type of this symbol.
          true,            // Is this globally visible?
          false,           // Is this symbol debug info?
          false,           // Is this symbol a trampoline?
          true,            // Is this symbol artificial?
          section_sp,      // Section in which this symbol is defined or null.
          offset,          // Offset in section or symbol value.
          0,     // Size:          Don't specify the size as an FDE can
          false, // Size is valid: cover multiple symbols.
          false, // Contains linker annotations?
          0);    // Symbol flags.
      new_symbols.push_back(eh_symbol);
    }
  }
  return true;
});

for (const Symbol &s : new_symbols)
  symbol_table->AddSymbol(s);
2974}

2976bool ObjectFileELF::IsStripped() {
// TODO: determine this for ELF
return false;
2979}

2981//===----------------------------------------------------------------------===//
2982// Dump
2983//
2984// Dump the specifics of the runtime file container (such as any headers
2985// segments, sections, etc).
2986//----------------------------------------------------------------------
2987void ObjectFileELF::Dump(Stream *s) {
ModuleSP module_sp(GetModule());
if (!module_sp) {
  return;
}

std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
s->Printf("%p: ", static_cast<void *>(this));
s->Indent();
s->PutCString("ObjectFileELF");

ArchSpec header_arch;
GetArchitecture(header_arch);

*s << ", file = '" << m_file
   << "', arch = " << header_arch.GetArchitectureName() << "\n";

DumpELFHeader(s, m_header);
s->EOL();
DumpELFProgramHeaders(s);
s->EOL();
DumpELFSectionHeaders(s);
s->EOL();
SectionList *section_list = GetSectionList();
if (section_list)
  section_list->Dump(s, NULL__null, true, UINT32_MAX(4294967295U));
Symtab *symtab = GetSymtab();
if (symtab)
  symtab->Dump(s, NULL__null, eSortOrderNone);
s->EOL();
DumpDependentModules(s);
s->EOL();
3019}

3021//----------------------------------------------------------------------
3022// DumpELFHeader
3023//
3024// Dump the ELF header to the specified output stream
3025//----------------------------------------------------------------------
3026void ObjectFileELF::DumpELFHeader(Stream *s, const ELFHeader &header) {
s->PutCString("ELF Header\n");
s->Printf("e_ident[EI_MAG0   ] = 0x%2.2x\n", header.e_ident[EI_MAG0]);
s->Printf("e_ident[EI_MAG1   ] = 0x%2.2x '%c'\n", header.e_ident[EI_MAG1],
          header.e_ident[EI_MAG1]);
s->Printf("e_ident[EI_MAG2   ] = 0x%2.2x '%c'\n", header.e_ident[EI_MAG2],
          header.e_ident[EI_MAG2]);
s->Printf("e_ident[EI_MAG3   ] = 0x%2.2x '%c'\n", header.e_ident[EI_MAG3],
          header.e_ident[EI_MAG3]);

s->Printf("e_ident[EI_CLASS  ] = 0x%2.2x\n", header.e_ident[EI_CLASS]);
s->Printf("e_ident[EI_DATA   ] = 0x%2.2x ", header.e_ident[EI_DATA]);
DumpELFHeader_e_ident_EI_DATA(s, header.e_ident[EI_DATA]);
s->Printf("\ne_ident[EI_VERSION] = 0x%2.2x\n", header.e_ident[EI_VERSION]);
s->Printf("e_ident[EI_PAD    ] = 0x%2.2x\n", header.e_ident[EI_PAD]);

s->Printf("e_type      = 0x%4.4x ", header.e_type);
DumpELFHeader_e_type(s, header.e_type);
s->Printf("\ne_machine   = 0x%4.4x\n", header.e_machine);
s->Printf("e_version   = 0x%8.8x\n", header.e_version);
s->Printf("e_entry     = 0x%8.8" PRIx64"l" "x" "\n", header.e_entry);
s->Printf("e_phoff     = 0x%8.8" PRIx64"l" "x" "\n", header.e_phoff);
s->Printf("e_shoff     = 0x%8.8" PRIx64"l" "x" "\n", header.e_shoff);
s->Printf("e_flags     = 0x%8.8x\n", header.e_flags);
s->Printf("e_ehsize    = 0x%4.4x\n", header.e_ehsize);
s->Printf("e_phentsize = 0x%4.4x\n", header.e_phentsize);
s->Printf("e_phnum     = 0x%8.8x\n", header.e_phnum);
s->Printf("e_shentsize = 0x%4.4x\n", header.e_shentsize);
s->Printf("e_shnum     = 0x%8.8x\n", header.e_shnum);
s->Printf("e_shstrndx  = 0x%8.8x\n", header.e_shstrndx);
3056}

3058//----------------------------------------------------------------------
3059// DumpELFHeader_e_type
3060//
3061// Dump an token value for the ELF header member e_type
3062//----------------------------------------------------------------------
3063void ObjectFileELF::DumpELFHeader_e_type(Stream *s, elf_half e_type) {
switch (e_type) {
case ET_NONE:
  *s << "ET_NONE";
  break;
case ET_REL:
  *s << "ET_REL";
  break;
case ET_EXEC:
  *s << "ET_EXEC";
  break;
case ET_DYN:
  *s << "ET_DYN";
  break;
case ET_CORE:
  *s << "ET_CORE";
  break;
default:
  break;
}
3083}

3085//----------------------------------------------------------------------
3086// DumpELFHeader_e_ident_EI_DATA
3087//
3088// Dump an token value for the ELF header member e_ident[EI_DATA]
3089//----------------------------------------------------------------------
3090void ObjectFileELF::DumpELFHeader_e_ident_EI_DATA(Stream *s,
                                                unsigned char ei_data) {
switch (ei_data) {
case ELFDATANONE:
  *s << "ELFDATANONE";
  break;
case ELFDATA2LSB:
  *s << "ELFDATA2LSB - Little Endian";
  break;
case ELFDATA2MSB:
  *s << "ELFDATA2MSB - Big Endian";
  break;
default:
  break;
}
3105}

3107//----------------------------------------------------------------------
3108// DumpELFProgramHeader
3109//
3110// Dump a single ELF program header to the specified output stream
3111//----------------------------------------------------------------------
3112void ObjectFileELF::DumpELFProgramHeader(Stream *s,
                                       const ELFProgramHeader &ph) {
DumpELFProgramHeader_p_type(s, ph.p_type);
s->Printf(" %8.8" PRIx64"l" "x" " %8.8" PRIx64"l" "x" " %8.8" PRIx64"l" "x", ph.p_offset,
          ph.p_vaddr, ph.p_paddr);
s->Printf(" %8.8" PRIx64"l" "x" " %8.8" PRIx64"l" "x" " %8.8x (", ph.p_filesz, ph.p_memsz,
          ph.p_flags);

DumpELFProgramHeader_p_flags(s, ph.p_flags);
s->Printf(") %8.8" PRIx64"l" "x", ph.p_align);
3122}

3124//----------------------------------------------------------------------
3125// DumpELFProgramHeader_p_type
3126//
3127// Dump an token value for the ELF program header member p_type which describes
3128// the type of the program header
3129// ----------------------------------------------------------------------
3130void ObjectFileELF::DumpELFProgramHeader_p_type(Stream *s, elf_word p_type) {
const int kStrWidth = 15;
switch (p_type) {
  CASE_AND_STREAM(s, PT_NULL, kStrWidth)case PT_NULL: s->Printf("%-*s", kStrWidth, "PT_NULL"); break
;;
  CASE_AND_STREAM(s, PT_LOAD, kStrWidth)case PT_LOAD: s->Printf("%-*s", kStrWidth, "PT_LOAD"); break
;;
  CASE_AND_STREAM(s, PT_DYNAMIC, kStrWidth)case PT_DYNAMIC: s->Printf("%-*s", kStrWidth, "PT_DYNAMIC"
); break;;
  CASE_AND_STREAM(s, PT_INTERP, kStrWidth)case PT_INTERP: s->Printf("%-*s", kStrWidth, "PT_INTERP");
 break;;
  CASE_AND_STREAM(s, PT_NOTE, kStrWidth)case PT_NOTE: s->Printf("%-*s", kStrWidth, "PT_NOTE"); break
;;
  CASE_AND_STREAM(s, PT_SHLIB, kStrWidth)case PT_SHLIB: s->Printf("%-*s", kStrWidth, "PT_SHLIB"); break
;;
  CASE_AND_STREAM(s, PT_PHDR, kStrWidth)case PT_PHDR: s->Printf("%-*s", kStrWidth, "PT_PHDR"); break
;;
  CASE_AND_STREAM(s, PT_TLS, kStrWidth)case PT_TLS: s->Printf("%-*s", kStrWidth, "PT_TLS"); break
;;
  CASE_AND_STREAM(s, PT_GNU_EH_FRAME, kStrWidth)case PT_GNU_EH_FRAME: s->Printf("%-*s", kStrWidth, "PT_GNU_EH_FRAME"
); break;;
default:
  s->Printf("0x%8.8x%*s", p_type, kStrWidth - 10, "");
  break;
}
3146}

3148//----------------------------------------------------------------------
3149// DumpELFProgramHeader_p_flags
3150//
3151// Dump an token value for the ELF program header member p_flags
3152//----------------------------------------------------------------------
3153void ObjectFileELF::DumpELFProgramHeader_p_flags(Stream *s, elf_word p_flags) {
*s << ((p_flags & PF_X) ? "PF_X" : "    ")
   << (((p_flags & PF_X) && (p_flags & PF_W)) ? '+' : ' ')
   << ((p_flags & PF_W) ? "PF_W" : "    ")
   << (((p_flags & PF_W) && (p_flags & PF_R)) ? '+' : ' ')
   << ((p_flags & PF_R) ? "PF_R" : "    ");
3159}

3161//----------------------------------------------------------------------
3162// DumpELFProgramHeaders
3163//
3164// Dump all of the ELF program header to the specified output stream
3165//----------------------------------------------------------------------
3166void ObjectFileELF::DumpELFProgramHeaders(Stream *s) {
if (!ParseProgramHeaders())
  return;

s->PutCString("Program Headers\n");
s->PutCString("IDX  p_type          p_offset p_vaddr  p_paddr  "
              "p_filesz p_memsz  p_flags                   p_align\n");
s->PutCString("==== --------------- -------- -------- -------- "
              "-------- -------- ------------------------- --------\n");

uint32_t idx = 0;
for (ProgramHeaderCollConstIter I = m_program_headers.begin();
     I != m_program_headers.end(); ++I, ++idx) {
  s->Printf("[%2u] ", idx);
  ObjectFileELF::DumpELFProgramHeader(s, *I);
  s->EOL();
}
3183}

3185//----------------------------------------------------------------------
3186// DumpELFSectionHeader
3187//
3188// Dump a single ELF section header to the specified output stream
3189//----------------------------------------------------------------------
3190void ObjectFileELF::DumpELFSectionHeader(Stream *s,
                                       const ELFSectionHeaderInfo &sh) {
s->Printf("%8.8x ", sh.sh_name);
DumpELFSectionHeader_sh_type(s, sh.sh_type);
s->Printf(" %8.8" PRIx64"l" "x" " (", sh.sh_flags);
DumpELFSectionHeader_sh_flags(s, sh.sh_flags);
s->Printf(") %8.8" PRIx64"l" "x" " %8.8" PRIx64"l" "x" " %8.8" PRIx64"l" "x", sh.sh_addr,
          sh.sh_offset, sh.sh_size);
s->Printf(" %8.8x %8.8x", sh.sh_link, sh.sh_info);
s->Printf(" %8.8" PRIx64"l" "x" " %8.8" PRIx64"l" "x", sh.sh_addralign, sh.sh_entsize);
3200}

3202//----------------------------------------------------------------------
3203// DumpELFSectionHeader_sh_type
3204//
3205// Dump an token value for the ELF section header member sh_type which
3206// describes the type of the section
3207//----------------------------------------------------------------------
3208void ObjectFileELF::DumpELFSectionHeader_sh_type(Stream *s, elf_word sh_type) {
const int kStrWidth = 12;
switch (sh_type) {
  CASE_AND_STREAM(s, SHT_NULL, kStrWidth)case SHT_NULL: s->Printf("%-*s", kStrWidth, "SHT_NULL"); break
;;
  CASE_AND_STREAM(s, SHT_PROGBITS, kStrWidth)case SHT_PROGBITS: s->Printf("%-*s", kStrWidth, "SHT_PROGBITS"
); break;;
  CASE_AND_STREAM(s, SHT_SYMTAB, kStrWidth)case SHT_SYMTAB: s->Printf("%-*s", kStrWidth, "SHT_SYMTAB"
); break;;
  CASE_AND_STREAM(s, SHT_STRTAB, kStrWidth)case SHT_STRTAB: s->Printf("%-*s", kStrWidth, "SHT_STRTAB"
); break;;
  CASE_AND_STREAM(s, SHT_RELA, kStrWidth)case SHT_RELA: s->Printf("%-*s", kStrWidth, "SHT_RELA"); break
;;
  CASE_AND_STREAM(s, SHT_HASH, kStrWidth)case SHT_HASH: s->Printf("%-*s", kStrWidth, "SHT_HASH"); break
;;
  CASE_AND_STREAM(s, SHT_DYNAMIC, kStrWidth)case SHT_DYNAMIC: s->Printf("%-*s", kStrWidth, "SHT_DYNAMIC"
); break;;
  CASE_AND_STREAM(s, SHT_NOTE, kStrWidth)case SHT_NOTE: s->Printf("%-*s", kStrWidth, "SHT_NOTE"); break
;;
  CASE_AND_STREAM(s, SHT_NOBITS, kStrWidth)case SHT_NOBITS: s->Printf("%-*s", kStrWidth, "SHT_NOBITS"
); break;;
  CASE_AND_STREAM(s, SHT_REL, kStrWidth)case SHT_REL: s->Printf("%-*s", kStrWidth, "SHT_REL"); break
;;
  CASE_AND_STREAM(s, SHT_SHLIB, kStrWidth)case SHT_SHLIB: s->Printf("%-*s", kStrWidth, "SHT_SHLIB");
 break;;
  CASE_AND_STREAM(s, SHT_DYNSYM, kStrWidth)case SHT_DYNSYM: s->Printf("%-*s", kStrWidth, "SHT_DYNSYM"
); break;;
  CASE_AND_STREAM(s, SHT_LOPROC, kStrWidth)case SHT_LOPROC: s->Printf("%-*s", kStrWidth, "SHT_LOPROC"
); break;;
  CASE_AND_STREAM(s, SHT_HIPROC, kStrWidth)case SHT_HIPROC: s->Printf("%-*s", kStrWidth, "SHT_HIPROC"
); break;;
  CASE_AND_STREAM(s, SHT_LOUSER, kStrWidth)case SHT_LOUSER: s->Printf("%-*s", kStrWidth, "SHT_LOUSER"
); break;;
  CASE_AND_STREAM(s, SHT_HIUSER, kStrWidth)case SHT_HIUSER: s->Printf("%-*s", kStrWidth, "SHT_HIUSER"
); break;;
default:
  s->Printf("0x%8.8x%*s", sh_type, kStrWidth - 10, "");
  break;
}
3231}

3233//----------------------------------------------------------------------
3234// DumpELFSectionHeader_sh_flags
3235//
3236// Dump an token value for the ELF section header member sh_flags
3237//----------------------------------------------------------------------
3238void ObjectFileELF::DumpELFSectionHeader_sh_flags(Stream *s,
                                                elf_xword sh_flags) {
*s << ((sh_flags & SHF_WRITE) ? "WRITE" : "     ")
   << (((sh_flags & SHF_WRITE) && (sh_flags & SHF_ALLOC)) ? '+' : ' ')
   << ((sh_flags & SHF_ALLOC) ? "ALLOC" : "     ")
   << (((sh_flags & SHF_ALLOC) && (sh_flags & SHF_EXECINSTR)) ? '+' : ' ')
   << ((sh_flags & SHF_EXECINSTR) ? "EXECINSTR" : "         ");
3245}

3247//----------------------------------------------------------------------
3248// DumpELFSectionHeaders
3249//
3250// Dump all of the ELF section header to the specified output stream
3251//----------------------------------------------------------------------
3252void ObjectFileELF::DumpELFSectionHeaders(Stream *s) {
if (!ParseSectionHeaders())
  return;

s->PutCString("Section Headers\n");
s->PutCString("IDX  name     type         flags                            "
              "addr     offset   size     link     info     addralgn "
              "entsize  Name\n");
s->PutCString("==== -------- ------------ -------------------------------- "
              "-------- -------- -------- -------- -------- -------- "
              "-------- ====================\n");

uint32_t idx = 0;
for (SectionHeaderCollConstIter I = m_section_headers.begin();
     I != m_section_headers.end(); ++I, ++idx) {
  s->Printf("[%2u] ", idx);
  ObjectFileELF::DumpELFSectionHeader(s, *I);
  const char *section_name = I->section_name.AsCString("");
  if (section_name)
    *s << ' ' << section_name << "\n";
}
3273}

3275void ObjectFileELF::DumpDependentModules(lldb_private::Stream *s) {
size_t num_modules = ParseDependentModules();

if (num_modules > 0) {
  s->PutCString("Dependent Modules:\n");
  for (unsigned i = 0; i < num_modules; ++i) {
    const FileSpec &spec = m_filespec_ap->GetFileSpecAtIndex(i);
    s->Printf("   %s\n", spec.GetFilename().GetCString());
  }
}
3285}

3287bool ObjectFileELF::GetArchitecture(ArchSpec &arch) {
if (!ParseHeader())
  return false;

if (m_section_headers.empty()) {
  // Allow elf notes to be parsed which may affect the detected architecture.
  ParseSectionHeaders();
}

if (CalculateType() == eTypeCoreFile &&
    m_arch_spec.TripleOSIsUnspecifiedUnknown()) {
  // Core files don't have section headers yet they have PT_NOTE program
  // headers that might shed more light on the architecture
  if (ParseProgramHeaders()) {
    for (size_t i = 1, count = GetProgramHeaderCount(); i <= count; ++i) {
      const elf::ELFProgramHeader *header = GetProgramHeaderByIndex(i);
      if (header && header->p_type == PT_NOTE && header->p_offset != 0 &&
          header->p_filesz > 0) {
        DataExtractor data;
        if (data.SetData(m_data, header->p_offset, header->p_filesz) ==
            header->p_filesz) {
          lldb_private::UUID uuid;
          RefineModuleDetailsFromNote(data, m_arch_spec, uuid);
        }
      }
    }
  }
}
arch = m_arch_spec;
return true;
3317}

3319ObjectFile::Type ObjectFileELF::CalculateType() {
switch (m_header.e_type) {
case llvm::ELF::ET_NONE:
  // 0 - No file type
  return eTypeUnknown;

case llvm::ELF::ET_REL:
  // 1 - Relocatable file
  return eTypeObjectFile;

case llvm::ELF::ET_EXEC:
  // 2 - Executable file
  return eTypeExecutable;

case llvm::ELF::ET_DYN:
  // 3 - Shared object file
  return eTypeSharedLibrary;

case ET_CORE:
  // 4 - Core file
  return eTypeCoreFile;

default:
  break;
}
return eTypeUnknown;
3345}

3347ObjectFile::Strata ObjectFileELF::CalculateStrata() {
switch (m_header.e_type) {
case llvm::ELF::ET_NONE:
  // 0 - No file type
  return eStrataUnknown;

case llvm::ELF::ET_REL:
  // 1 - Relocatable file
  return eStrataUnknown;

case llvm::ELF::ET_EXEC:
  // 2 - Executable file
  // TODO: is there any way to detect that an executable is a kernel
  // related executable by inspecting the program headers, section headers,
  // symbols, or any other flag bits???
  return eStrataUser;

case llvm::ELF::ET_DYN:
  // 3 - Shared object file
  // TODO: is there any way to detect that an shared library is a kernel
  // related executable by inspecting the program headers, section headers,
  // symbols, or any other flag bits???
  return eStrataUnknown;

case ET_CORE:
  // 4 - Core file
  // TODO: is there any way to detect that an core file is a kernel
  // related executable by inspecting the program headers, section headers,
  // symbols, or any other flag bits???
  return eStrataUnknown;

default:
  break;
}
return eStrataUnknown;
3382}

3384size_t ObjectFileELF::ReadSectionData(Section *section,
                     lldb::offset_t section_offset, void *dst,
                     size_t dst_len) {
// If some other objectfile owns this data, pass this to them.
if (section->GetObjectFile() != this)
  return section->GetObjectFile()->ReadSectionData(section, section_offset,
                                                   dst, dst_len);

if (!section->Test(SHF_COMPRESSED))
  return ObjectFile::ReadSectionData(section, section_offset, dst, dst_len);

// For compressed sections we need to read to full data to be able to
// decompress.
DataExtractor data;
ReadSectionData(section, data);
return data.CopyData(section_offset, dst_len, dst);
3400}

3402size_t ObjectFileELF::ReadSectionData(Section *section,
                                    DataExtractor &section_data) {
// If some other objectfile owns this data, pass this to them.
if (section->GetObjectFile() != this)
  return section->GetObjectFile()->ReadSectionData(section, section_data);

size_t result = ObjectFile::ReadSectionData(section, section_data);
if (result == 0 || !section->Test(SHF_COMPRESSED))
  return result;

auto Decompressor = llvm::object::Decompressor::create(
    section->GetName().GetStringRef(),
    {reinterpret_cast<const char *>(section_data.GetDataStart()),
     size_t(section_data.GetByteSize())},
    GetByteOrder() == eByteOrderLittle, GetAddressByteSize() == 8);
if (!Decompressor) {
  GetModule()->ReportWarning(
      "Unable to initialize decompressor for section '%s': %s",
      section->GetName().GetCString(),
      llvm::toString(Decompressor.takeError()).c_str());
  section_data.Clear();
  return 0;
}

auto buffer_sp =
    std::make_shared<DataBufferHeap>(Decompressor->getDecompressedSize(), 0);
if (auto error = Decompressor->decompress(
        {reinterpret_cast<char *>(buffer_sp->GetBytes()),
         size_t(buffer_sp->GetByteSize())})) {
  GetModule()->ReportWarning(
      "Decompression of section '%s' failed: %s",
      section->GetName().GetCString(),
      llvm::toString(std::move(error)).c_str());
  section_data.Clear();
  return 0;
}

section_data.SetData(buffer_sp);
return buffer_sp->GetByteSize();
3441}

3443bool ObjectFileELF::AnySegmentHasPhysicalAddress() {
size_t header_count = ParseProgramHeaders();
for (size_t i = 1; i <= header_count; ++i) {
  auto header = GetProgramHeaderByIndex(i);
  if (header->p_paddr != 0)
    return true;
}
return false;
3451}

3453std::vector<ObjectFile::LoadableData>
3454ObjectFileELF::GetLoadableData(Target &target) {
// Create a list of loadable data from loadable segments, using physical
// addresses if they aren't all null
std::vector<LoadableData> loadables;
size_t header_count = ParseProgramHeaders();
bool should_use_paddr = AnySegmentHasPhysicalAddress();
for (size_t i = 1; i <= header_count; ++i) {
  LoadableData loadable;
  auto header = GetProgramHeaderByIndex(i);
  if (header->p_type != llvm::ELF::PT_LOAD)
    continue;
  loadable.Dest = should_use_paddr ? header->p_paddr : header->p_vaddr;
  if (loadable.Dest == LLDB_INVALID_ADDRESS(18446744073709551615UL))
    continue;
  if (header->p_filesz == 0)
    continue;
  auto segment_data = GetSegmentDataByIndex(i);
  loadable.Contents = llvm::ArrayRef<uint8_t>(segment_data.GetDataStart(),
                                              segment_data.GetByteSize());
  loadables.push_back(loadable);
}
return loadables;
3476}