YQ Connector: support managed ClickHouse

Со стороны dqrun можно обратиться к инстансу коннектора, который работает на streaming стенде, и извлечь данные из облачного CH.

1 files changed, 894 insertions, 0 deletions

diff --git a/contrib/libs/llvm16/include/llvm/BinaryFormat/Dwarf.h b/contrib/libs/llvm16/include/llvm/BinaryFormat/Dwarf.h
new file mode 100644
index 0000000000..05383171bb
--- /dev/null
+++ b/contrib/libs/llvm16/include/llvm/BinaryFormat/Dwarf.h
@@ -0,0 +1,894 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===-- llvm/BinaryFormat/Dwarf.h ---Dwarf Constants-------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// This file contains constants used for implementing Dwarf
+/// debug support.
+///
+/// For details on the Dwarf specfication see the latest DWARF Debugging
+/// Information Format standard document on http://www.dwarfstd.org. This
+/// file often includes support for non-released standard features.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_BINARYFORMAT_DWARF_H
+#define LLVM_BINARYFORMAT_DWARF_H
+
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/DataTypes.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/FormatVariadicDetails.h"
+#include "llvm/ADT/Triple.h"
+
+#include <limits>
+
+namespace llvm {
+class StringRef;
+
+namespace dwarf {
+
+//===----------------------------------------------------------------------===//
+// DWARF constants as gleaned from the DWARF Debugging Information Format V.5
+// reference manual http://www.dwarfstd.org/.
+//
+
+// Do not mix the following two enumerations sets.  DW_TAG_invalid changes the
+// enumeration base type.
+
+enum LLVMConstants : uint32_t {
+  /// LLVM mock tags (see also llvm/BinaryFormat/Dwarf.def).
+  /// \{
+  DW_TAG_invalid = ~0U,        ///< Tag for invalid results.
+  DW_VIRTUALITY_invalid = ~0U, ///< Virtuality for invalid results.
+  DW_MACINFO_invalid = ~0U,    ///< Macinfo type for invalid results.
+  /// \}
+
+  /// Special values for an initial length field.
+  /// \{
+  DW_LENGTH_lo_reserved = 0xfffffff0, ///< Lower bound of the reserved range.
+  DW_LENGTH_DWARF64 = 0xffffffff,     ///< Indicator of 64-bit DWARF format.
+  DW_LENGTH_hi_reserved = 0xffffffff, ///< Upper bound of the reserved range.
+  /// \}
+
+  /// Other constants.
+  /// \{
+  DWARF_VERSION = 4,       ///< Default dwarf version we output.
+  DW_PUBTYPES_VERSION = 2, ///< Section version number for .debug_pubtypes.
+  DW_PUBNAMES_VERSION = 2, ///< Section version number for .debug_pubnames.
+  DW_ARANGES_VERSION = 2,  ///< Section version number for .debug_aranges.
+  /// \}
+
+  /// Identifiers we use to distinguish vendor extensions.
+  /// \{
+  DWARF_VENDOR_DWARF = 0, ///< Defined in v2 or later of the DWARF standard.
+  DWARF_VENDOR_APPLE = 1,
+  DWARF_VENDOR_BORLAND = 2,
+  DWARF_VENDOR_GNU = 3,
+  DWARF_VENDOR_GOOGLE = 4,
+  DWARF_VENDOR_LLVM = 5,
+  DWARF_VENDOR_MIPS = 6,
+  DWARF_VENDOR_WASM = 7,
+  DWARF_VENDOR_ALTIUM,
+  DWARF_VENDOR_COMPAQ,
+  DWARF_VENDOR_GHS,
+  DWARF_VENDOR_GO,
+  DWARF_VENDOR_HP,
+  DWARF_VENDOR_IBM,
+  DWARF_VENDOR_INTEL,
+  DWARF_VENDOR_PGI,
+  DWARF_VENDOR_SUN,
+  DWARF_VENDOR_UPC,
+  ///\}
+};
+
+/// Constants that define the DWARF format as 32 or 64 bit.
+enum DwarfFormat : uint8_t { DWARF32, DWARF64 };
+
+/// Special ID values that distinguish a CIE from a FDE in DWARF CFI.
+/// Not inside an enum because a 64-bit value is needed.
+/// @{
+const uint32_t DW_CIE_ID = UINT32_MAX;
+const uint64_t DW64_CIE_ID = UINT64_MAX;
+/// @}
+
+/// Identifier of an invalid DIE offset in the .debug_info section.
+const uint32_t DW_INVALID_OFFSET = UINT32_MAX;
+
+enum Tag : uint16_t {
+#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND) DW_TAG_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_TAG_lo_user = 0x4080,
+  DW_TAG_hi_user = 0xffff,
+  DW_TAG_user_base = 0x1000 ///< Recommended base for user tags.
+};
+
+inline bool isType(Tag T) {
+  switch (T) {
+  default:
+    return false;
+#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR, KIND)                         \
+  case DW_TAG_##NAME:                                                          \
+    return (KIND == DW_KIND_TYPE);
+#include "llvm/BinaryFormat/Dwarf.def"
+  }
+}
+
+/// Attributes.
+enum Attribute : uint16_t {
+#define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR) DW_AT_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_AT_lo_user = 0x2000,
+  DW_AT_hi_user = 0x3fff,
+};
+
+enum Form : uint16_t {
+#define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR) DW_FORM_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_FORM_lo_user = 0x1f00, ///< Not specified by DWARF.
+};
+
+enum LocationAtom {
+#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR) DW_OP_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_OP_lo_user = 0xe0,
+  DW_OP_hi_user = 0xff,
+  DW_OP_LLVM_fragment = 0x1000,         ///< Only used in LLVM metadata.
+  DW_OP_LLVM_convert = 0x1001,          ///< Only used in LLVM metadata.
+  DW_OP_LLVM_tag_offset = 0x1002,       ///< Only used in LLVM metadata.
+  DW_OP_LLVM_entry_value = 0x1003,      ///< Only used in LLVM metadata.
+  DW_OP_LLVM_implicit_pointer = 0x1004, ///< Only used in LLVM metadata.
+  DW_OP_LLVM_arg = 0x1005,              ///< Only used in LLVM metadata.
+};
+
+enum TypeKind : uint8_t {
+#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR) DW_ATE_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_ATE_lo_user = 0x80,
+  DW_ATE_hi_user = 0xff
+};
+
+enum DecimalSignEncoding {
+  // Decimal sign attribute values
+  DW_DS_unsigned = 0x01,
+  DW_DS_leading_overpunch = 0x02,
+  DW_DS_trailing_overpunch = 0x03,
+  DW_DS_leading_separate = 0x04,
+  DW_DS_trailing_separate = 0x05
+};
+
+enum EndianityEncoding {
+  // Endianity attribute values
+#define HANDLE_DW_END(ID, NAME) DW_END_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_END_lo_user = 0x40,
+  DW_END_hi_user = 0xff
+};
+
+enum AccessAttribute {
+  // Accessibility codes
+  DW_ACCESS_public = 0x01,
+  DW_ACCESS_protected = 0x02,
+  DW_ACCESS_private = 0x03
+};
+
+enum VisibilityAttribute {
+  // Visibility codes
+  DW_VIS_local = 0x01,
+  DW_VIS_exported = 0x02,
+  DW_VIS_qualified = 0x03
+};
+
+enum VirtualityAttribute {
+#define HANDLE_DW_VIRTUALITY(ID, NAME) DW_VIRTUALITY_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_VIRTUALITY_max = 0x02
+};
+
+enum DefaultedMemberAttribute {
+#define HANDLE_DW_DEFAULTED(ID, NAME) DW_DEFAULTED_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_DEFAULTED_max = 0x02
+};
+
+enum SourceLanguage {
+#define HANDLE_DW_LANG(ID, NAME, LOWER_BOUND, VERSION, VENDOR)                 \
+  DW_LANG_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_LANG_lo_user = 0x8000,
+  DW_LANG_hi_user = 0xffff
+};
+
+inline bool isCPlusPlus(SourceLanguage S) {
+  bool result = false;
+  // Deliberately enumerate all the language options so we get a warning when
+  // new language options are added (-Wswitch) that'll hopefully help keep this
+  // switch up-to-date when new C++ versions are added.
+  switch (S) {
+  case DW_LANG_C_plus_plus:
+  case DW_LANG_C_plus_plus_03:
+  case DW_LANG_C_plus_plus_11:
+  case DW_LANG_C_plus_plus_14:
+  case DW_LANG_C_plus_plus_17:
+  case DW_LANG_C_plus_plus_20:
+    result = true;
+    break;
+  case DW_LANG_C89:
+  case DW_LANG_C:
+  case DW_LANG_Ada83:
+  case DW_LANG_Cobol74:
+  case DW_LANG_Cobol85:
+  case DW_LANG_Fortran77:
+  case DW_LANG_Fortran90:
+  case DW_LANG_Pascal83:
+  case DW_LANG_Modula2:
+  case DW_LANG_Java:
+  case DW_LANG_C99:
+  case DW_LANG_Ada95:
+  case DW_LANG_Fortran95:
+  case DW_LANG_PLI:
+  case DW_LANG_ObjC:
+  case DW_LANG_ObjC_plus_plus:
+  case DW_LANG_UPC:
+  case DW_LANG_D:
+  case DW_LANG_Python:
+  case DW_LANG_OpenCL:
+  case DW_LANG_Go:
+  case DW_LANG_Modula3:
+  case DW_LANG_Haskell:
+  case DW_LANG_OCaml:
+  case DW_LANG_Rust:
+  case DW_LANG_C11:
+  case DW_LANG_Swift:
+  case DW_LANG_Julia:
+  case DW_LANG_Dylan:
+  case DW_LANG_Fortran03:
+  case DW_LANG_Fortran08:
+  case DW_LANG_RenderScript:
+  case DW_LANG_BLISS:
+  case DW_LANG_Mips_Assembler:
+  case DW_LANG_GOOGLE_RenderScript:
+  case DW_LANG_BORLAND_Delphi:
+  case DW_LANG_lo_user:
+  case DW_LANG_hi_user:
+  case DW_LANG_Kotlin:
+  case DW_LANG_Zig:
+  case DW_LANG_Crystal:
+  case DW_LANG_C17:
+  case DW_LANG_Fortran18:
+  case DW_LANG_Ada2005:
+  case DW_LANG_Ada2012:
+    result = false;
+    break;
+  }
+
+  return result;
+}
+
+inline bool isFortran(SourceLanguage S) {
+  bool result = false;
+  // Deliberately enumerate all the language options so we get a warning when
+  // new language options are added (-Wswitch) that'll hopefully help keep this
+  // switch up-to-date when new Fortran versions are added.
+  switch (S) {
+  case DW_LANG_Fortran77:
+  case DW_LANG_Fortran90:
+  case DW_LANG_Fortran95:
+  case DW_LANG_Fortran03:
+  case DW_LANG_Fortran08:
+  case DW_LANG_Fortran18:
+    result = true;
+    break;
+  case DW_LANG_C89:
+  case DW_LANG_C:
+  case DW_LANG_Ada83:
+  case DW_LANG_C_plus_plus:
+  case DW_LANG_Cobol74:
+  case DW_LANG_Cobol85:
+  case DW_LANG_Pascal83:
+  case DW_LANG_Modula2:
+  case DW_LANG_Java:
+  case DW_LANG_C99:
+  case DW_LANG_Ada95:
+  case DW_LANG_PLI:
+  case DW_LANG_ObjC:
+  case DW_LANG_ObjC_plus_plus:
+  case DW_LANG_UPC:
+  case DW_LANG_D:
+  case DW_LANG_Python:
+  case DW_LANG_OpenCL:
+  case DW_LANG_Go:
+  case DW_LANG_Modula3:
+  case DW_LANG_Haskell:
+  case DW_LANG_C_plus_plus_03:
+  case DW_LANG_C_plus_plus_11:
+  case DW_LANG_OCaml:
+  case DW_LANG_Rust:
+  case DW_LANG_C11:
+  case DW_LANG_Swift:
+  case DW_LANG_Julia:
+  case DW_LANG_Dylan:
+  case DW_LANG_C_plus_plus_14:
+  case DW_LANG_RenderScript:
+  case DW_LANG_BLISS:
+  case DW_LANG_Mips_Assembler:
+  case DW_LANG_GOOGLE_RenderScript:
+  case DW_LANG_BORLAND_Delphi:
+  case DW_LANG_lo_user:
+  case DW_LANG_hi_user:
+  case DW_LANG_Kotlin:
+  case DW_LANG_Zig:
+  case DW_LANG_Crystal:
+  case DW_LANG_C_plus_plus_17:
+  case DW_LANG_C_plus_plus_20:
+  case DW_LANG_C17:
+  case DW_LANG_Ada2005:
+  case DW_LANG_Ada2012:
+    result = false;
+    break;
+  }
+
+  return result;
+}
+
+inline bool isC(SourceLanguage S) {
+  // Deliberately enumerate all the language options so we get a warning when
+  // new language options are added (-Wswitch) that'll hopefully help keep this
+  // switch up-to-date when new C++ versions are added.
+  switch (S) {
+  case DW_LANG_C11:
+  case DW_LANG_C17:
+  case DW_LANG_C89:
+  case DW_LANG_C99:
+  case DW_LANG_C:
+  case DW_LANG_ObjC:
+    return true;
+  case DW_LANG_C_plus_plus:
+  case DW_LANG_C_plus_plus_03:
+  case DW_LANG_C_plus_plus_11:
+  case DW_LANG_C_plus_plus_14:
+  case DW_LANG_C_plus_plus_17:
+  case DW_LANG_C_plus_plus_20:
+  case DW_LANG_Ada83:
+  case DW_LANG_Cobol74:
+  case DW_LANG_Cobol85:
+  case DW_LANG_Fortran77:
+  case DW_LANG_Fortran90:
+  case DW_LANG_Pascal83:
+  case DW_LANG_Modula2:
+  case DW_LANG_Java:
+  case DW_LANG_Ada95:
+  case DW_LANG_Fortran95:
+  case DW_LANG_PLI:
+  case DW_LANG_ObjC_plus_plus:
+  case DW_LANG_UPC:
+  case DW_LANG_D:
+  case DW_LANG_Python:
+  case DW_LANG_OpenCL:
+  case DW_LANG_Go:
+  case DW_LANG_Modula3:
+  case DW_LANG_Haskell:
+  case DW_LANG_OCaml:
+  case DW_LANG_Rust:
+  case DW_LANG_Swift:
+  case DW_LANG_Julia:
+  case DW_LANG_Dylan:
+  case DW_LANG_Fortran03:
+  case DW_LANG_Fortran08:
+  case DW_LANG_RenderScript:
+  case DW_LANG_BLISS:
+  case DW_LANG_Mips_Assembler:
+  case DW_LANG_GOOGLE_RenderScript:
+  case DW_LANG_BORLAND_Delphi:
+  case DW_LANG_lo_user:
+  case DW_LANG_hi_user:
+  case DW_LANG_Kotlin:
+  case DW_LANG_Zig:
+  case DW_LANG_Crystal:
+  case DW_LANG_Fortran18:
+  case DW_LANG_Ada2005:
+  case DW_LANG_Ada2012:
+    return false;
+  }
+  llvm_unreachable("Unknown language kind.");
+}
+
+inline TypeKind getArrayIndexTypeEncoding(SourceLanguage S) {
+  return isFortran(S) ? DW_ATE_signed : DW_ATE_unsigned;
+}
+
+enum CaseSensitivity {
+  // Identifier case codes
+  DW_ID_case_sensitive = 0x00,
+  DW_ID_up_case = 0x01,
+  DW_ID_down_case = 0x02,
+  DW_ID_case_insensitive = 0x03
+};
+
+enum CallingConvention {
+// Calling convention codes
+#define HANDLE_DW_CC(ID, NAME) DW_CC_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_CC_lo_user = 0x40,
+  DW_CC_hi_user = 0xff
+};
+
+enum InlineAttribute {
+  // Inline codes
+  DW_INL_not_inlined = 0x00,
+  DW_INL_inlined = 0x01,
+  DW_INL_declared_not_inlined = 0x02,
+  DW_INL_declared_inlined = 0x03
+};
+
+enum ArrayDimensionOrdering {
+  // Array ordering
+  DW_ORD_row_major = 0x00,
+  DW_ORD_col_major = 0x01
+};
+
+enum DiscriminantList {
+  // Discriminant descriptor values
+  DW_DSC_label = 0x00,
+  DW_DSC_range = 0x01
+};
+
+/// Line Number Standard Opcode Encodings.
+enum LineNumberOps : uint8_t {
+#define HANDLE_DW_LNS(ID, NAME) DW_LNS_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+};
+
+/// Line Number Extended Opcode Encodings.
+enum LineNumberExtendedOps {
+#define HANDLE_DW_LNE(ID, NAME) DW_LNE_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_LNE_lo_user = 0x80,
+  DW_LNE_hi_user = 0xff
+};
+
+enum LineNumberEntryFormat {
+#define HANDLE_DW_LNCT(ID, NAME) DW_LNCT_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_LNCT_lo_user = 0x2000,
+  DW_LNCT_hi_user = 0x3fff,
+};
+
+enum MacinfoRecordType {
+  // Macinfo Type Encodings
+  DW_MACINFO_define = 0x01,
+  DW_MACINFO_undef = 0x02,
+  DW_MACINFO_start_file = 0x03,
+  DW_MACINFO_end_file = 0x04,
+  DW_MACINFO_vendor_ext = 0xff
+};
+
+/// DWARF v5 macro information entry type encodings.
+enum MacroEntryType {
+#define HANDLE_DW_MACRO(ID, NAME) DW_MACRO_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_MACRO_lo_user = 0xe0,
+  DW_MACRO_hi_user = 0xff
+};
+
+/// GNU .debug_macro macro information entry type encodings.
+enum GnuMacroEntryType {
+#define HANDLE_DW_MACRO_GNU(ID, NAME) DW_MACRO_GNU_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_MACRO_GNU_lo_user = 0xe0,
+  DW_MACRO_GNU_hi_user = 0xff
+};
+
+/// DWARF v5 range list entry encoding values.
+enum RnglistEntries {
+#define HANDLE_DW_RLE(ID, NAME) DW_RLE_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+};
+
+/// DWARF v5 loc list entry encoding values.
+enum LoclistEntries {
+#define HANDLE_DW_LLE(ID, NAME) DW_LLE_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+};
+
+/// Call frame instruction encodings.
+enum CallFrameInfo {
+#define HANDLE_DW_CFA(ID, NAME) DW_CFA_##NAME = ID,
+#define HANDLE_DW_CFA_PRED(ID, NAME, ARCH) DW_CFA_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_CFA_extended = 0x00,
+
+  DW_CFA_lo_user = 0x1c,
+  DW_CFA_hi_user = 0x3f
+};
+
+enum Constants {
+  // Children flag
+  DW_CHILDREN_no = 0x00,
+  DW_CHILDREN_yes = 0x01,
+
+  DW_EH_PE_absptr = 0x00,
+  DW_EH_PE_omit = 0xff,
+  DW_EH_PE_uleb128 = 0x01,
+  DW_EH_PE_udata2 = 0x02,
+  DW_EH_PE_udata4 = 0x03,
+  DW_EH_PE_udata8 = 0x04,
+  DW_EH_PE_sleb128 = 0x09,
+  DW_EH_PE_sdata2 = 0x0A,
+  DW_EH_PE_sdata4 = 0x0B,
+  DW_EH_PE_sdata8 = 0x0C,
+  DW_EH_PE_signed = 0x08,
+  DW_EH_PE_pcrel = 0x10,
+  DW_EH_PE_textrel = 0x20,
+  DW_EH_PE_datarel = 0x30,
+  DW_EH_PE_funcrel = 0x40,
+  DW_EH_PE_aligned = 0x50,
+  DW_EH_PE_indirect = 0x80
+};
+
+/// Constants for the DW_APPLE_PROPERTY_attributes attribute.
+/// Keep this list in sync with clang's DeclObjCCommon.h
+/// ObjCPropertyAttribute::Kind!
+enum ApplePropertyAttributes {
+#define HANDLE_DW_APPLE_PROPERTY(ID, NAME) DW_APPLE_PROPERTY_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+};
+
+/// Constants for unit types in DWARF v5.
+enum UnitType : unsigned char {
+#define HANDLE_DW_UT(ID, NAME) DW_UT_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_UT_lo_user = 0x80,
+  DW_UT_hi_user = 0xff
+};
+
+enum Index {
+#define HANDLE_DW_IDX(ID, NAME) DW_IDX_##NAME = ID,
+#include "llvm/BinaryFormat/Dwarf.def"
+  DW_IDX_lo_user = 0x2000,
+  DW_IDX_hi_user = 0x3fff
+};
+
+inline bool isUnitType(uint8_t UnitType) {
+  switch (UnitType) {
+  case DW_UT_compile:
+  case DW_UT_type:
+  case DW_UT_partial:
+  case DW_UT_skeleton:
+  case DW_UT_split_compile:
+  case DW_UT_split_type:
+    return true;
+  default:
+    return false;
+  }
+}
+
+inline bool isUnitType(dwarf::Tag T) {
+  switch (T) {
+  case DW_TAG_compile_unit:
+  case DW_TAG_type_unit:
+  case DW_TAG_partial_unit:
+  case DW_TAG_skeleton_unit:
+    return true;
+  default:
+    return false;
+  }
+}
+
+// Constants for the DWARF v5 Accelerator Table Proposal
+enum AcceleratorTable {
+  // Data layout descriptors.
+  DW_ATOM_null = 0u,       ///  Marker as the end of a list of atoms.
+  DW_ATOM_die_offset = 1u, // DIE offset in the debug_info section.
+  DW_ATOM_cu_offset = 2u, // Offset of the compile unit header that contains the
+                          // item in question.
+  DW_ATOM_die_tag = 3u,   // A tag entry.
+  DW_ATOM_type_flags = 4u, // Set of flags for a type.
+
+  DW_ATOM_type_type_flags = 5u, // Dsymutil type extension.
+  DW_ATOM_qual_name_hash = 6u,  // Dsymutil qualified hash extension.
+
+  // DW_ATOM_type_flags values.
+
+  // Always set for C++, only set for ObjC if this is the @implementation for a
+  // class.
+  DW_FLAG_type_implementation = 2u,
+
+  // Hash functions.
+
+  // Daniel J. Bernstein hash.
+  DW_hash_function_djb = 0u
+};
+
+// Constants for the GNU pubnames/pubtypes extensions supporting gdb index.
+enum GDBIndexEntryKind {
+  GIEK_NONE,
+  GIEK_TYPE,
+  GIEK_VARIABLE,
+  GIEK_FUNCTION,
+  GIEK_OTHER,
+  GIEK_UNUSED5,
+  GIEK_UNUSED6,
+  GIEK_UNUSED7
+};
+
+enum GDBIndexEntryLinkage { GIEL_EXTERNAL, GIEL_STATIC };
+
+/// \defgroup DwarfConstantsDumping Dwarf constants dumping functions
+///
+/// All these functions map their argument's value back to the
+/// corresponding enumerator name or return an empty StringRef if the value
+/// isn't known.
+///
+/// @{
+StringRef TagString(unsigned Tag);
+StringRef ChildrenString(unsigned Children);
+StringRef AttributeString(unsigned Attribute);
+StringRef FormEncodingString(unsigned Encoding);
+StringRef OperationEncodingString(unsigned Encoding);
+StringRef AttributeEncodingString(unsigned Encoding);
+StringRef DecimalSignString(unsigned Sign);
+StringRef EndianityString(unsigned Endian);
+StringRef AccessibilityString(unsigned Access);
+StringRef DefaultedMemberString(unsigned DefaultedEncodings);
+StringRef VisibilityString(unsigned Visibility);
+StringRef VirtualityString(unsigned Virtuality);
+StringRef LanguageString(unsigned Language);
+StringRef CaseString(unsigned Case);
+StringRef ConventionString(unsigned Convention);
+StringRef InlineCodeString(unsigned Code);
+StringRef ArrayOrderString(unsigned Order);
+StringRef LNStandardString(unsigned Standard);
+StringRef LNExtendedString(unsigned Encoding);
+StringRef MacinfoString(unsigned Encoding);
+StringRef MacroString(unsigned Encoding);
+StringRef GnuMacroString(unsigned Encoding);
+StringRef RangeListEncodingString(unsigned Encoding);
+StringRef LocListEncodingString(unsigned Encoding);
+StringRef CallFrameString(unsigned Encoding, Triple::ArchType Arch);
+StringRef ApplePropertyString(unsigned);
+StringRef UnitTypeString(unsigned);
+StringRef AtomTypeString(unsigned Atom);
+StringRef GDBIndexEntryKindString(GDBIndexEntryKind Kind);
+StringRef GDBIndexEntryLinkageString(GDBIndexEntryLinkage Linkage);
+StringRef IndexString(unsigned Idx);
+StringRef FormatString(DwarfFormat Format);
+StringRef FormatString(bool IsDWARF64);
+StringRef RLEString(unsigned RLE);
+/// @}
+
+/// \defgroup DwarfConstantsParsing Dwarf constants parsing functions
+///
+/// These functions map their strings back to the corresponding enumeration
+/// value or return 0 if there is none, except for these exceptions:
+///
+/// \li \a getTag() returns \a DW_TAG_invalid on invalid input.
+/// \li \a getVirtuality() returns \a DW_VIRTUALITY_invalid on invalid input.
+/// \li \a getMacinfo() returns \a DW_MACINFO_invalid on invalid input.
+///
+/// @{
+unsigned getTag(StringRef TagString);
+unsigned getOperationEncoding(StringRef OperationEncodingString);
+unsigned getVirtuality(StringRef VirtualityString);
+unsigned getLanguage(StringRef LanguageString);
+unsigned getCallingConvention(StringRef LanguageString);
+unsigned getAttributeEncoding(StringRef EncodingString);
+unsigned getMacinfo(StringRef MacinfoString);
+unsigned getMacro(StringRef MacroString);
+/// @}
+
+/// \defgroup DwarfConstantsVersioning Dwarf version for constants
+///
+/// For constants defined by DWARF, returns the DWARF version when the constant
+/// was first defined. For vendor extensions, if there is a version-related
+/// policy for when to emit it, returns a version number for that policy.
+/// Otherwise returns 0.
+///
+/// @{
+unsigned TagVersion(Tag T);
+unsigned AttributeVersion(Attribute A);
+unsigned FormVersion(Form F);
+unsigned OperationVersion(LocationAtom O);
+unsigned AttributeEncodingVersion(TypeKind E);
+unsigned LanguageVersion(SourceLanguage L);
+/// @}
+
+/// \defgroup DwarfConstantsVendor Dwarf "vendor" for constants
+///
+/// These functions return an identifier describing "who" defined the constant,
+/// either the DWARF standard itself or the vendor who defined the extension.
+///
+/// @{
+unsigned TagVendor(Tag T);
+unsigned AttributeVendor(Attribute A);
+unsigned FormVendor(Form F);
+unsigned OperationVendor(LocationAtom O);
+unsigned AttributeEncodingVendor(TypeKind E);
+unsigned LanguageVendor(SourceLanguage L);
+/// @}
+
+std::optional<unsigned> LanguageLowerBound(SourceLanguage L);
+
+/// The size of a reference determined by the DWARF 32/64-bit format.
+inline uint8_t getDwarfOffsetByteSize(DwarfFormat Format) {
+  switch (Format) {
+  case DwarfFormat::DWARF32:
+    return 4;
+  case DwarfFormat::DWARF64:
+    return 8;
+  }
+  llvm_unreachable("Invalid Format value");
+}
+
+/// A helper struct providing information about the byte size of DW_FORM
+/// values that vary in size depending on the DWARF version, address byte
+/// size, or DWARF32/DWARF64.
+struct FormParams {
+  uint16_t Version;
+  uint8_t AddrSize;
+  DwarfFormat Format;
+  /// True if DWARF v2 output generally uses relocations for references
+  /// to other .debug_* sections.
+  bool DwarfUsesRelocationsAcrossSections = false;
+
+  /// The definition of the size of form DW_FORM_ref_addr depends on the
+  /// version. In DWARF v2 it's the size of an address; after that, it's the
+  /// size of a reference.
+  uint8_t getRefAddrByteSize() const {
+    if (Version == 2)
+      return AddrSize;
+    return getDwarfOffsetByteSize();
+  }
+
+  /// The size of a reference is determined by the DWARF 32/64-bit format.
+  uint8_t getDwarfOffsetByteSize() const {
+    return dwarf::getDwarfOffsetByteSize(Format);
+  }
+
+  explicit operator bool() const { return Version && AddrSize; }
+};
+
+/// Get the byte size of the unit length field depending on the DWARF format.
+inline uint8_t getUnitLengthFieldByteSize(DwarfFormat Format) {
+  switch (Format) {
+  case DwarfFormat::DWARF32:
+    return 4;
+  case DwarfFormat::DWARF64:
+    return 12;
+  }
+  llvm_unreachable("Invalid Format value");
+}
+
+/// Get the fixed byte size for a given form.
+///
+/// If the form has a fixed byte size, then an Optional with a value will be
+/// returned. If the form is always encoded using a variable length storage
+/// format (ULEB or SLEB numbers or blocks) then std::nullopt will be returned.
+///
+/// \param Form DWARF form to get the fixed byte size for.
+/// \param Params DWARF parameters to help interpret forms.
+/// \returns std::optional<uint8_t> value with the fixed byte size or
+/// std::nullopt if \p Form doesn't have a fixed byte size.
+std::optional<uint8_t> getFixedFormByteSize(dwarf::Form Form,
+                                            FormParams Params);
+
+/// Tells whether the specified form is defined in the specified version,
+/// or is an extension if extensions are allowed.
+bool isValidFormForVersion(Form F, unsigned Version, bool ExtensionsOk = true);
+
+/// Returns the symbolic string representing Val when used as a value
+/// for attribute Attr.
+StringRef AttributeValueString(uint16_t Attr, unsigned Val);
+
+/// Returns the symbolic string representing Val when used as a value
+/// for atom Atom.
+StringRef AtomValueString(uint16_t Atom, unsigned Val);
+
+/// Describes an entry of the various gnu_pub* debug sections.
+///
+/// The gnu_pub* kind looks like:
+///
+/// 0-3  reserved
+/// 4-6  symbol kind
+/// 7    0 == global, 1 == static
+///
+/// A gdb_index descriptor includes the above kind, shifted 24 bits up with the
+/// offset of the cu within the debug_info section stored in those 24 bits.
+struct PubIndexEntryDescriptor {
+  GDBIndexEntryKind Kind;
+  GDBIndexEntryLinkage Linkage;
+  PubIndexEntryDescriptor(GDBIndexEntryKind Kind, GDBIndexEntryLinkage Linkage)
+      : Kind(Kind), Linkage(Linkage) {}
+  /* implicit */ PubIndexEntryDescriptor(GDBIndexEntryKind Kind)
+      : Kind(Kind), Linkage(GIEL_EXTERNAL) {}
+  explicit PubIndexEntryDescriptor(uint8_t Value)
+      : Kind(
+            static_cast<GDBIndexEntryKind>((Value & KIND_MASK) >> KIND_OFFSET)),
+        Linkage(static_cast<GDBIndexEntryLinkage>((Value & LINKAGE_MASK) >>
+                                                  LINKAGE_OFFSET)) {}
+  uint8_t toBits() const {
+    return Kind << KIND_OFFSET | Linkage << LINKAGE_OFFSET;
+  }
+
+private:
+  enum {
+    KIND_OFFSET = 4,
+    KIND_MASK = 7 << KIND_OFFSET,
+    LINKAGE_OFFSET = 7,
+    LINKAGE_MASK = 1 << LINKAGE_OFFSET
+  };
+};
+
+template <typename Enum> struct EnumTraits : public std::false_type {};
+
+template <> struct EnumTraits<Attribute> : public std::true_type {
+  static constexpr char Type[3] = "AT";
+  static constexpr StringRef (*StringFn)(unsigned) = &AttributeString;
+};
+
+template <> struct EnumTraits<Form> : public std::true_type {
+  static constexpr char Type[5] = "FORM";
+  static constexpr StringRef (*StringFn)(unsigned) = &FormEncodingString;
+};
+
+template <> struct EnumTraits<Index> : public std::true_type {
+  static constexpr char Type[4] = "IDX";
+  static constexpr StringRef (*StringFn)(unsigned) = &IndexString;
+};
+
+template <> struct EnumTraits<Tag> : public std::true_type {
+  static constexpr char Type[4] = "TAG";
+  static constexpr StringRef (*StringFn)(unsigned) = &TagString;
+};
+
+template <> struct EnumTraits<LineNumberOps> : public std::true_type {
+  static constexpr char Type[4] = "LNS";
+  static constexpr StringRef (*StringFn)(unsigned) = &LNStandardString;
+};
+
+template <> struct EnumTraits<LocationAtom> : public std::true_type {
+  static constexpr char Type[3] = "OP";
+  static constexpr StringRef (*StringFn)(unsigned) = &OperationEncodingString;
+};
+
+inline uint64_t computeTombstoneAddress(uint8_t AddressByteSize) {
+  return std::numeric_limits<uint64_t>::max() >> (8 - AddressByteSize) * 8;
+}
+
+} // End of namespace dwarf
+
+/// Dwarf constants format_provider
+///
+/// Specialization of the format_provider template for dwarf enums. Unlike the
+/// dumping functions above, these format unknown enumerator values as
+/// DW_TYPE_unknown_1234 (e.g. DW_TAG_unknown_ffff).
+template <typename Enum>
+struct format_provider<Enum, std::enable_if_t<dwarf::EnumTraits<Enum>::value>> {
+  static void format(const Enum &E, raw_ostream &OS, StringRef Style) {
+    StringRef Str = dwarf::EnumTraits<Enum>::StringFn(E);
+    if (Str.empty()) {
+      OS << "DW_" << dwarf::EnumTraits<Enum>::Type << "_unknown_"
+         << llvm::format("%x", E);
+    } else
+      OS << Str;
+  }
+};
+} // End of namespace llvm
+
+#endif
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif