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llvm-mirror/lib/BinaryFormat/Dwarf.cpp
Luke Cheeseman 5e7163d110 [AArch64] - Return address signing dwarf support 
- Reapply changes intially introduced in r343089
- The archtecture info is no longer loaded whenever a DWARFContext is created
- The runtimes libraries (santiziers) make use of the dwarf context classes but
  do not intialise the target info
- The architecture of the object can be obtained without loading the target info
- Adding a method to the dwarf context to get this information and multiplex the
  string printing later on

Differential Revision: https://reviews.llvm.org/D55774

llvm-svn: 349472
2018-12-18 10:37:42 +00:00

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//===-- llvm/BinaryFormat/Dwarf.cpp - Dwarf Framework ------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains support for generic dwarf information.
//
//===----------------------------------------------------------------------===//
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
using namespace dwarf;
StringRef llvm::dwarf::TagString(unsigned Tag) {
switch (Tag) {
default:
return StringRef();
#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR) \
case DW_TAG_##NAME: \
return "DW_TAG_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::getTag(StringRef TagString) {
return StringSwitch<unsigned>(TagString)
#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR) \
.Case("DW_TAG_" #NAME, DW_TAG_##NAME)
#include "llvm/BinaryFormat/Dwarf.def"
.Default(DW_TAG_invalid);
}
unsigned llvm::dwarf::TagVersion(dwarf::Tag Tag) {
switch (Tag) {
default:
return 0;
#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR) \
case DW_TAG_##NAME: \
return VERSION;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::TagVendor(dwarf::Tag Tag) {
switch (Tag) {
default:
return 0;
#define HANDLE_DW_TAG(ID, NAME, VERSION, VENDOR) \
case DW_TAG_##NAME: \
return DWARF_VENDOR_##VENDOR;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::ChildrenString(unsigned Children) {
switch (Children) {
case DW_CHILDREN_no:
return "DW_CHILDREN_no";
case DW_CHILDREN_yes:
return "DW_CHILDREN_yes";
}
return StringRef();
}
StringRef llvm::dwarf::AttributeString(unsigned Attribute) {
switch (Attribute) {
default:
return StringRef();
#define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR) \
case DW_AT_##NAME: \
return "DW_AT_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::AttributeVersion(dwarf::Attribute Attribute) {
switch (Attribute) {
default:
return 0;
#define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR) \
case DW_AT_##NAME: \
return VERSION;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::AttributeVendor(dwarf::Attribute Attribute) {
switch (Attribute) {
default:
return 0;
#define HANDLE_DW_AT(ID, NAME, VERSION, VENDOR) \
case DW_AT_##NAME: \
return DWARF_VENDOR_##VENDOR;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::FormEncodingString(unsigned Encoding) {
switch (Encoding) {
default:
return StringRef();
#define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR) \
case DW_FORM_##NAME: \
return "DW_FORM_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::FormVersion(dwarf::Form Form) {
switch (Form) {
default:
return 0;
#define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR) \
case DW_FORM_##NAME: \
return VERSION;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::FormVendor(dwarf::Form Form) {
switch (Form) {
default:
return 0;
#define HANDLE_DW_FORM(ID, NAME, VERSION, VENDOR) \
case DW_FORM_##NAME: \
return DWARF_VENDOR_##VENDOR;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::OperationEncodingString(unsigned Encoding) {
switch (Encoding) {
default:
return StringRef();
#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR) \
case DW_OP_##NAME: \
return "DW_OP_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
case DW_OP_LLVM_fragment:
return "DW_OP_LLVM_fragment";
}
}
unsigned llvm::dwarf::getOperationEncoding(StringRef OperationEncodingString) {
return StringSwitch<unsigned>(OperationEncodingString)
#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR) \
.Case("DW_OP_" #NAME, DW_OP_##NAME)
#include "llvm/BinaryFormat/Dwarf.def"
.Case("DW_OP_LLVM_fragment", DW_OP_LLVM_fragment)
.Default(0);
}
unsigned llvm::dwarf::OperationVersion(dwarf::LocationAtom Op) {
switch (Op) {
default:
return 0;
#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR) \
case DW_OP_##NAME: \
return VERSION;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::OperationVendor(dwarf::LocationAtom Op) {
switch (Op) {
default:
return 0;
#define HANDLE_DW_OP(ID, NAME, VERSION, VENDOR) \
case DW_OP_##NAME: \
return DWARF_VENDOR_##VENDOR;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::AttributeEncodingString(unsigned Encoding) {
switch (Encoding) {
default:
return StringRef();
#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR) \
case DW_ATE_##NAME: \
return "DW_ATE_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::getAttributeEncoding(StringRef EncodingString) {
return StringSwitch<unsigned>(EncodingString)
#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR) \
.Case("DW_ATE_" #NAME, DW_ATE_##NAME)
#include "llvm/BinaryFormat/Dwarf.def"
.Default(0);
}
unsigned llvm::dwarf::AttributeEncodingVersion(dwarf::TypeKind ATE) {
switch (ATE) {
default:
return 0;
#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR) \
case DW_ATE_##NAME: \
return VERSION;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::AttributeEncodingVendor(dwarf::TypeKind ATE) {
switch (ATE) {
default:
return 0;
#define HANDLE_DW_ATE(ID, NAME, VERSION, VENDOR) \
case DW_ATE_##NAME: \
return DWARF_VENDOR_##VENDOR;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::DecimalSignString(unsigned Sign) {
switch (Sign) {
case DW_DS_unsigned:
return "DW_DS_unsigned";
case DW_DS_leading_overpunch:
return "DW_DS_leading_overpunch";
case DW_DS_trailing_overpunch:
return "DW_DS_trailing_overpunch";
case DW_DS_leading_separate:
return "DW_DS_leading_separate";
case DW_DS_trailing_separate:
return "DW_DS_trailing_separate";
}
return StringRef();
}
StringRef llvm::dwarf::EndianityString(unsigned Endian) {
switch (Endian) {
case DW_END_default:
return "DW_END_default";
case DW_END_big:
return "DW_END_big";
case DW_END_little:
return "DW_END_little";
case DW_END_lo_user:
return "DW_END_lo_user";
case DW_END_hi_user:
return "DW_END_hi_user";
}
return StringRef();
}
StringRef llvm::dwarf::AccessibilityString(unsigned Access) {
switch (Access) {
// Accessibility codes
case DW_ACCESS_public:
return "DW_ACCESS_public";
case DW_ACCESS_protected:
return "DW_ACCESS_protected";
case DW_ACCESS_private:
return "DW_ACCESS_private";
}
return StringRef();
}
StringRef llvm::dwarf::VisibilityString(unsigned Visibility) {
switch (Visibility) {
case DW_VIS_local:
return "DW_VIS_local";
case DW_VIS_exported:
return "DW_VIS_exported";
case DW_VIS_qualified:
return "DW_VIS_qualified";
}
return StringRef();
}
StringRef llvm::dwarf::VirtualityString(unsigned Virtuality) {
switch (Virtuality) {
default:
return StringRef();
#define HANDLE_DW_VIRTUALITY(ID, NAME) \
case DW_VIRTUALITY_##NAME: \
return "DW_VIRTUALITY_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::getVirtuality(StringRef VirtualityString) {
return StringSwitch<unsigned>(VirtualityString)
#define HANDLE_DW_VIRTUALITY(ID, NAME) \
.Case("DW_VIRTUALITY_" #NAME, DW_VIRTUALITY_##NAME)
#include "llvm/BinaryFormat/Dwarf.def"
.Default(DW_VIRTUALITY_invalid);
}
StringRef llvm::dwarf::LanguageString(unsigned Language) {
switch (Language) {
default:
return StringRef();
#define HANDLE_DW_LANG(ID, NAME, VERSION, VENDOR) \
case DW_LANG_##NAME: \
return "DW_LANG_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::getLanguage(StringRef LanguageString) {
return StringSwitch<unsigned>(LanguageString)
#define HANDLE_DW_LANG(ID, NAME, VERSION, VENDOR) \
.Case("DW_LANG_" #NAME, DW_LANG_##NAME)
#include "llvm/BinaryFormat/Dwarf.def"
.Default(0);
}
unsigned llvm::dwarf::LanguageVersion(dwarf::SourceLanguage Lang) {
switch (Lang) {
default:
return 0;
#define HANDLE_DW_LANG(ID, NAME, VERSION, VENDOR) \
case DW_LANG_##NAME: \
return VERSION;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::LanguageVendor(dwarf::SourceLanguage Lang) {
switch (Lang) {
default:
return 0;
#define HANDLE_DW_LANG(ID, NAME, VERSION, VENDOR) \
case DW_LANG_##NAME: \
return DWARF_VENDOR_##VENDOR;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::CaseString(unsigned Case) {
switch (Case) {
case DW_ID_case_sensitive:
return "DW_ID_case_sensitive";
case DW_ID_up_case:
return "DW_ID_up_case";
case DW_ID_down_case:
return "DW_ID_down_case";
case DW_ID_case_insensitive:
return "DW_ID_case_insensitive";
}
return StringRef();
}
StringRef llvm::dwarf::ConventionString(unsigned CC) {
switch (CC) {
default:
return StringRef();
#define HANDLE_DW_CC(ID, NAME) \
case DW_CC_##NAME: \
return "DW_CC_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
unsigned llvm::dwarf::getCallingConvention(StringRef CCString) {
return StringSwitch<unsigned>(CCString)
#define HANDLE_DW_CC(ID, NAME) .Case("DW_CC_" #NAME, DW_CC_##NAME)
#include "llvm/BinaryFormat/Dwarf.def"
.Default(0);
}
StringRef llvm::dwarf::InlineCodeString(unsigned Code) {
switch (Code) {
case DW_INL_not_inlined:
return "DW_INL_not_inlined";
case DW_INL_inlined:
return "DW_INL_inlined";
case DW_INL_declared_not_inlined:
return "DW_INL_declared_not_inlined";
case DW_INL_declared_inlined:
return "DW_INL_declared_inlined";
}
return StringRef();
}
StringRef llvm::dwarf::ArrayOrderString(unsigned Order) {
switch (Order) {
case DW_ORD_row_major:
return "DW_ORD_row_major";
case DW_ORD_col_major:
return "DW_ORD_col_major";
}
return StringRef();
}
StringRef llvm::dwarf::LNStandardString(unsigned Standard) {
switch (Standard) {
default:
return StringRef();
#define HANDLE_DW_LNS(ID, NAME) \
case DW_LNS_##NAME: \
return "DW_LNS_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::LNExtendedString(unsigned Encoding) {
switch (Encoding) {
default:
return StringRef();
#define HANDLE_DW_LNE(ID, NAME) \
case DW_LNE_##NAME: \
return "DW_LNE_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::MacinfoString(unsigned Encoding) {
switch (Encoding) {
// Macinfo Type Encodings
case DW_MACINFO_define:
return "DW_MACINFO_define";
case DW_MACINFO_undef:
return "DW_MACINFO_undef";
case DW_MACINFO_start_file:
return "DW_MACINFO_start_file";
case DW_MACINFO_end_file:
return "DW_MACINFO_end_file";
case DW_MACINFO_vendor_ext:
return "DW_MACINFO_vendor_ext";
case DW_MACINFO_invalid:
return "DW_MACINFO_invalid";
}
return StringRef();
}
unsigned llvm::dwarf::getMacinfo(StringRef MacinfoString) {
return StringSwitch<unsigned>(MacinfoString)
.Case("DW_MACINFO_define", DW_MACINFO_define)
.Case("DW_MACINFO_undef", DW_MACINFO_undef)
.Case("DW_MACINFO_start_file", DW_MACINFO_start_file)
.Case("DW_MACINFO_end_file", DW_MACINFO_end_file)
.Case("DW_MACINFO_vendor_ext", DW_MACINFO_vendor_ext)
.Default(DW_MACINFO_invalid);
}
StringRef llvm::dwarf::RangeListEncodingString(unsigned Encoding) {
switch (Encoding) {
default:
return StringRef();
#define HANDLE_DW_RLE(ID, NAME) \
case DW_RLE_##NAME: \
return "DW_RLE_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::CallFrameString(unsigned Encoding,
Triple::ArchType Arch) {
assert(Arch != llvm::Triple::ArchType::UnknownArch);
#define SELECT_AARCH64 (Arch == llvm::Triple::aarch64_be || Arch == llvm::Triple::aarch64)
#define SELECT_MIPS64 Arch == llvm::Triple::mips64
#define SELECT_SPARC (Arch == llvm::Triple::sparc || Arch == llvm::Triple::sparcv9)
#define SELECT_X86 (Arch == llvm::Triple::x86 || Arch == llvm::Triple::x86_64)
#define HANDLE_DW_CFA(ID, NAME)
#define HANDLE_DW_CFA_PRED(ID, NAME, PRED) \
if (ID == Encoding && PRED) \
return "DW_CFA_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
switch (Encoding) {
default:
return StringRef();
#define HANDLE_DW_CFA_PRED(ID, NAME, PRED)
#define HANDLE_DW_CFA(ID, NAME) \
case DW_CFA_##NAME: \
return "DW_CFA_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
#undef SELECT_X86
#undef SELECT_SPARC
#undef SELECT_MIPS64
#undef SELECT_AARCH64
}
}
StringRef llvm::dwarf::ApplePropertyString(unsigned Prop) {
switch (Prop) {
default:
return StringRef();
#define HANDLE_DW_APPLE_PROPERTY(ID, NAME) \
case DW_APPLE_PROPERTY_##NAME: \
return "DW_APPLE_PROPERTY_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::UnitTypeString(unsigned UT) {
switch (UT) {
default:
return StringRef();
#define HANDLE_DW_UT(ID, NAME) \
case DW_UT_##NAME: \
return "DW_UT_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
StringRef llvm::dwarf::AtomTypeString(unsigned AT) {
switch (AT) {
case dwarf::DW_ATOM_null:
return "DW_ATOM_null";
case dwarf::DW_ATOM_die_offset:
return "DW_ATOM_die_offset";
case DW_ATOM_cu_offset:
return "DW_ATOM_cu_offset";
case DW_ATOM_die_tag:
return "DW_ATOM_die_tag";
case DW_ATOM_type_flags:
case DW_ATOM_type_type_flags:
return "DW_ATOM_type_flags";
case DW_ATOM_qual_name_hash:
return "DW_ATOM_qual_name_hash";
}
return StringRef();
}
StringRef llvm::dwarf::GDBIndexEntryKindString(GDBIndexEntryKind Kind) {
switch (Kind) {
case GIEK_NONE:
return "NONE";
case GIEK_TYPE:
return "TYPE";
case GIEK_VARIABLE:
return "VARIABLE";
case GIEK_FUNCTION:
return "FUNCTION";
case GIEK_OTHER:
return "OTHER";
case GIEK_UNUSED5:
return "UNUSED5";
case GIEK_UNUSED6:
return "UNUSED6";
case GIEK_UNUSED7:
return "UNUSED7";
}
llvm_unreachable("Unknown GDBIndexEntryKind value");
}
StringRef
llvm::dwarf::GDBIndexEntryLinkageString(GDBIndexEntryLinkage Linkage) {
switch (Linkage) {
case GIEL_EXTERNAL:
return "EXTERNAL";
case GIEL_STATIC:
return "STATIC";
}
llvm_unreachable("Unknown GDBIndexEntryLinkage value");
}
StringRef llvm::dwarf::AttributeValueString(uint16_t Attr, unsigned Val) {
switch (Attr) {
case DW_AT_accessibility:
return AccessibilityString(Val);
case DW_AT_virtuality:
return VirtualityString(Val);
case DW_AT_language:
return LanguageString(Val);
case DW_AT_encoding:
return AttributeEncodingString(Val);
case DW_AT_decimal_sign:
return DecimalSignString(Val);
case DW_AT_endianity:
return EndianityString(Val);
case DW_AT_visibility:
return VisibilityString(Val);
case DW_AT_identifier_case:
return CaseString(Val);
case DW_AT_calling_convention:
return ConventionString(Val);
case DW_AT_inline:
return InlineCodeString(Val);
case DW_AT_ordering:
return ArrayOrderString(Val);
case DW_AT_APPLE_runtime_class:
return LanguageString(Val);
}
return StringRef();
}
StringRef llvm::dwarf::AtomValueString(uint16_t Atom, unsigned Val) {
switch (Atom) {
case DW_ATOM_null:
return "NULL";
case DW_ATOM_die_tag:
return TagString(Val);
}
return StringRef();
}
StringRef llvm::dwarf::IndexString(unsigned Idx) {
switch (Idx) {
default:
return StringRef();
#define HANDLE_DW_IDX(ID, NAME) \
case DW_IDX_##NAME: \
return "DW_IDX_" #NAME;
#include "llvm/BinaryFormat/Dwarf.def"
}
}
Optional<uint8_t> llvm::dwarf::getFixedFormByteSize(dwarf::Form Form,
FormParams Params) {
switch (Form) {
case DW_FORM_addr:
if (Params)
return Params.AddrSize;
return None;
case DW_FORM_block: // ULEB128 length L followed by L bytes.
case DW_FORM_block1: // 1 byte length L followed by L bytes.
case DW_FORM_block2: // 2 byte length L followed by L bytes.
case DW_FORM_block4: // 4 byte length L followed by L bytes.
case DW_FORM_string: // C-string with null terminator.
case DW_FORM_sdata: // SLEB128.
case DW_FORM_udata: // ULEB128.
case DW_FORM_ref_udata: // ULEB128.
case DW_FORM_indirect: // ULEB128.
case DW_FORM_exprloc: // ULEB128 length L followed by L bytes.
case DW_FORM_strx: // ULEB128.
case DW_FORM_addrx: // ULEB128.
case DW_FORM_loclistx: // ULEB128.
case DW_FORM_rnglistx: // ULEB128.
case DW_FORM_GNU_addr_index: // ULEB128.
case DW_FORM_GNU_str_index: // ULEB128.
return None;
case DW_FORM_ref_addr:
if (Params)
return Params.getRefAddrByteSize();
return None;
case DW_FORM_flag:
case DW_FORM_data1:
case DW_FORM_ref1:
case DW_FORM_strx1:
case DW_FORM_addrx1:
return 1;
case DW_FORM_data2:
case DW_FORM_ref2:
case DW_FORM_strx2:
case DW_FORM_addrx2:
return 2;
case DW_FORM_strx3:
return 3;
case DW_FORM_data4:
case DW_FORM_ref4:
case DW_FORM_ref_sup4:
case DW_FORM_strx4:
case DW_FORM_addrx4:
return 4;
case DW_FORM_strp:
case DW_FORM_GNU_ref_alt:
case DW_FORM_GNU_strp_alt:
case DW_FORM_line_strp:
case DW_FORM_sec_offset:
case DW_FORM_strp_sup:
if (Params)
return Params.getDwarfOffsetByteSize();
return None;
case DW_FORM_data8:
case DW_FORM_ref8:
case DW_FORM_ref_sig8:
case DW_FORM_ref_sup8:
return 8;
case DW_FORM_flag_present:
return 0;
case DW_FORM_data16:
return 16;
case DW_FORM_implicit_const:
// The implicit value is stored in the abbreviation as a SLEB128, and
// there no data in debug info.
return 0;
default:
break;
}
return None;
}
bool llvm::dwarf::isValidFormForVersion(Form F, unsigned Version,
bool ExtensionsOk) {
if (FormVendor(F) == DWARF_VENDOR_DWARF) {
unsigned FV = FormVersion(F);
return FV > 0 && FV <= Version;
}
return ExtensionsOk;
}
constexpr char llvm::dwarf::EnumTraits<Attribute>::Type[];
constexpr char llvm::dwarf::EnumTraits<Form>::Type[];
constexpr char llvm::dwarf::EnumTraits<Index>::Type[];
constexpr char llvm::dwarf::EnumTraits<Tag>::Type[];
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