[lld] r276921 - [lld][MachO] Add debug info support for MachO.
Lang Hames via llvm-commits
llvm-commits at lists.llvm.org
Thu Jul 28 14:03:57 PDT 2016
Hi Galina,
These issues should have been fixed by r276935 and r276999, and Rafael's
change in r277022.
Cheers,
Lang.
On Thu, Jul 28, 2016 at 11:02 AM, Galina Kistanova <gkistanova at gmail.com>
wrote:
> Hello Lang,
>
> This revision broke at least two builders:
>
> http://lab.llvm.org:8011/builders/llvm-clang-lld-x86_64-scei-ps4-windows10pro-fast/builds/9027
> http://lab.llvm.org:8011/builders/lld-x86_64-win7/builds/37314
>
> Please have a look at this?
>
> Thanks
>
> Galina
>
> On Wed, Jul 27, 2016 at 2:31 PM, Lang Hames via llvm-commits <
> llvm-commits at lists.llvm.org> wrote:
>
>> Author: lhames
>> Date: Wed Jul 27 16:31:25 2016
>> New Revision: 276921
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=276921&view=rev
>> Log:
>> [lld][MachO] Add debug info support for MachO.
>>
>> This patch causes LLD to build stabs debugging symbols for files
>> containing
>> DWARF debug info, and to propagate existing stabs symbols for object files
>> built using '-r' mode. This enables debugging of binaries generated by LLD
>> from MachO objects.
>>
>>
>> Added:
>> lld/trunk/lib/ReaderWriter/MachO/DebugInfo.h
>> lld/trunk/test/mach-o/debug-syms.yaml
>> Modified:
>> lld/trunk/lib/ReaderWriter/MachO/ArchHandler_x86_64.cpp
>> lld/trunk/lib/ReaderWriter/MachO/CMakeLists.txt
>> lld/trunk/lib/ReaderWriter/MachO/File.h
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFile.h
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileFromAtoms.cpp
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileToAtoms.cpp
>>
>> Modified: lld/trunk/lib/ReaderWriter/MachO/ArchHandler_x86_64.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/ArchHandler_x86_64.cpp?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/ArchHandler_x86_64.cpp (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/ArchHandler_x86_64.cpp Wed Jul 27
>> 16:31:25 2016
>> @@ -463,7 +463,10 @@ ArchHandler_x86_64::getPairReferenceInfo
>> return ec;
>> uint64_t encodedAddend = (int64_t)*(const little64_t *)fixupContent;
>> if (inAtom == fromTarget) {
>> - *kind = delta64;
>> + if (inAtom->contentType() == DefinedAtom::typeCFI)
>> + *kind = unwindFDEToFunction;
>> + else
>> + *kind = delta64;
>> *addend = encodedAddend + offsetInAtom;
>> } else if (inAtom == *target) {
>> *kind = negDelta64;
>>
>> Modified: lld/trunk/lib/ReaderWriter/MachO/CMakeLists.txt
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/CMakeLists.txt?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/CMakeLists.txt (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/CMakeLists.txt Wed Jul 27 16:31:25
>> 2016
>> @@ -21,6 +21,7 @@ add_lld_library(lldMachO
>> LINK_LIBS
>> lldCore
>> lldYAML
>> + LLVMDebugInfoDWARF
>> LLVMObject
>> LLVMSupport
>> ${PTHREAD_LIB}
>>
>> Added: lld/trunk/lib/ReaderWriter/MachO/DebugInfo.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/DebugInfo.h?rev=276921&view=auto
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/DebugInfo.h (added)
>> +++ lld/trunk/lib/ReaderWriter/MachO/DebugInfo.h Wed Jul 27 16:31:25 2016
>> @@ -0,0 +1,310 @@
>> +//===- lib/ReaderWriter/MachO/File.h ----------------------------*- C++
>> -*-===//
>> +//
>> +// The LLVM Linker
>> +//
>> +// This file is distributed under the University of Illinois Open Source
>> +// License. See LICENSE.TXT for details.
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +
>> +#ifndef LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +#define LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +
>> +#include "lld/Core/Atom.h"
>> +#include <vector>
>> +
>> +#include "llvm/Support/Format.h"
>> +#include "llvm/Support/raw_ostream.h"
>> +
>> +
>> +namespace lld {
>> +namespace mach_o {
>> +
>> +class DebugInfo {
>> +public:
>> + enum class Kind {
>> + Dwarf,
>> + Stabs
>> + };
>> +
>> + Kind kind() const { return _kind; }
>> +
>> + void setAllocator(std::unique_ptr<llvm::BumpPtrAllocator> allocator) {
>> + _allocator = std::move(allocator);
>> + }
>> +
>> +protected:
>> + DebugInfo(Kind kind) : _kind(kind) {}
>> +
>> +private:
>> + std::unique_ptr<llvm::BumpPtrAllocator> _allocator;
>> + Kind _kind;
>> +};
>> +
>> +struct TranslationUnitSource {
>> + StringRef name;
>> + StringRef path;
>> +};
>> +
>> +class DwarfDebugInfo : public DebugInfo {
>> +public:
>> + DwarfDebugInfo(TranslationUnitSource tu)
>> + : DebugInfo(Kind::Dwarf), _tu(std::move(tu)) {}
>> +
>> + static inline bool classof(const DebugInfo *di) {
>> + return di->kind() == Kind::Dwarf;
>> + }
>> +
>> + const TranslationUnitSource &translationUnitSource() const { return
>> _tu; }
>> +
>> +private:
>> + TranslationUnitSource _tu;
>> +};
>> +
>> +struct Stab {
>> + Stab(const Atom* atom, uint8_t type, uint8_t other, uint16_t desc,
>> + uint32_t value, StringRef str)
>> + : atom(atom), type(type), other(other), desc(desc), value(value),
>> + str(str) {}
>> +
>> + const class Atom* atom;
>> + uint8_t type;
>> + uint8_t other;
>> + uint16_t desc;
>> + uint32_t value;
>> + StringRef str;
>> +};
>> +
>> +inline raw_ostream& operator<<(raw_ostream &os, Stab &s) {
>> + os << "Stab -- atom: " << llvm::format("%p", s.atom) << ", type: " <<
>> (uint32_t)s.type
>> + << ", other: " << (uint32_t)s.other << ", desc: " << s.desc << ",
>> value: " << s.value
>> + << ", str: '" << s.str << "'";
>> + return os;
>> +}
>> +
>> +class StabsDebugInfo : public DebugInfo {
>> +public:
>> +
>> + typedef std::vector<Stab> StabsList;
>> +
>> + StabsDebugInfo(StabsList stabs)
>> + : DebugInfo(Kind::Stabs), _stabs(std::move(stabs)) {}
>> +
>> + static inline bool classof(const DebugInfo *di) {
>> + return di->kind() == Kind::Stabs;
>> + }
>> +
>> + const StabsList& stabs() const { return _stabs; }
>> +
>> +public:
>> + StabsList _stabs;
>> +};
>> +
>> +} // end namespace mach_o
>> +} // end namespace lld
>> +
>> +#endif // LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +//===- lib/ReaderWriter/MachO/File.h ----------------------------*- C++
>> -*-===//
>> +//
>> +// The LLVM Linker
>> +//
>> +// This file is distributed under the University of Illinois Open Source
>> +// License. See LICENSE.TXT for details.
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +
>> +#ifndef LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +#define LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +
>> +#include "lld/Core/Atom.h"
>> +#include <vector>
>> +
>> +#include "llvm/Support/Format.h"
>> +#include "llvm/Support/raw_ostream.h"
>> +
>> +
>> +namespace lld {
>> +namespace mach_o {
>> +
>> +class DebugInfo {
>> +public:
>> + enum class Kind {
>> + Dwarf,
>> + Stabs
>> + };
>> +
>> + Kind kind() const { return _kind; }
>> +
>> +protected:
>> + DebugInfo(Kind kind) : _kind(kind) {}
>> +
>> +private:
>> + Kind _kind;
>> +};
>> +
>> +
>> +struct TranslationUnitSource {
>> + StringRef name;
>> + StringRef path;
>> +};
>> +
>> +class DwarfDebugInfo : public DebugInfo {
>> +public:
>> + DwarfDebugInfo(TranslationUnitSource tu)
>> + : DebugInfo(Kind::Dwarf), _tu(std::move(tu)) {}
>> +
>> + static inline bool classof(const DebugInfo *di) {
>> + return di->kind() == Kind::Dwarf;
>> + }
>> +
>> + const TranslationUnitSource &translationUnitSource() const { return
>> _tu; }
>> +
>> +private:
>> + TranslationUnitSource _tu;
>> +};
>> +
>> +struct Stab {
>> + Stab(const Atom* atom, uint8_t type, uint8_t other, uint16_t desc,
>> + uint32_t value, StringRef str)
>> + : atom(atom), type(type), other(other), desc(desc), value(value),
>> + str(str) {}
>> +
>> + const class Atom* atom;
>> + uint8_t type;
>> + uint8_t other;
>> + uint16_t desc;
>> + uint32_t value;
>> + StringRef str;
>> +};
>> +
>> +inline raw_ostream& operator<<(raw_ostream &os, Stab &s) {
>> + os << "Stab -- atom: " << llvm::format("%p", s.atom) << ", type: " <<
>> (uint32_t)s.type
>> + << ", other: " << (uint32_t)s.other << ", desc: " << s.desc << ",
>> value: " << s.value
>> + << ", str: '" << s.str << "'";
>> + return os;
>> +}
>> +
>> +class StabsDebugInfo : public DebugInfo {
>> +public:
>> +
>> + typedef std::vector<Stab> StabsList;
>> +
>> + StabsDebugInfo(StabsList stabs)
>> + : DebugInfo(Kind::Stabs), _stabs(std::move(stabs)) {}
>> +
>> + static inline bool classof(const DebugInfo *di) {
>> + return di->kind() == Kind::Stabs;
>> + }
>> +
>> + const StabsList& stabs() const { return _stabs; }
>> +
>> +public:
>> + StabsList _stabs;
>> +};
>> +
>> +} // end namespace mach_o
>> +} // end namespace lld
>> +
>> +#endif // LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +//===- lib/ReaderWriter/MachO/File.h ----------------------------*- C++
>> -*-===//
>> +//
>> +// The LLVM Linker
>> +//
>> +// This file is distributed under the University of Illinois Open Source
>> +// License. See LICENSE.TXT for details.
>> +//
>>
>> +//===----------------------------------------------------------------------===//
>> +
>> +#ifndef LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +#define LLD_READER_WRITER_MACHO_DEBUGINFO_H
>> +
>> +#include "lld/Core/Atom.h"
>> +#include <vector>
>> +
>> +#include "llvm/Support/Format.h"
>> +#include "llvm/Support/raw_ostream.h"
>> +
>> +
>> +namespace lld {
>> +namespace mach_o {
>> +
>> +class DebugInfo {
>> +public:
>> + enum class Kind {
>> + Dwarf,
>> + Stabs
>> + };
>> +
>> + Kind kind() const { return _kind; }
>> +
>> +protected:
>> + DebugInfo(Kind kind) : _kind(kind) {}
>> +
>> +private:
>> + Kind _kind;
>> +};
>> +
>> +
>> +struct TranslationUnitSource {
>> + StringRef name;
>> + StringRef path;
>> +};
>> +
>> +class DwarfDebugInfo : public DebugInfo {
>> +public:
>> + DwarfDebugInfo(TranslationUnitSource tu)
>> + : DebugInfo(Kind::Dwarf), _tu(std::move(tu)) {}
>> +
>> + static inline bool classof(const DebugInfo *di) {
>> + return di->kind() == Kind::Dwarf;
>> + }
>> +
>> + const TranslationUnitSource &translationUnitSource() const { return
>> _tu; }
>> +
>> +private:
>> + TranslationUnitSource _tu;
>> +};
>> +
>> +struct Stab {
>> + Stab(const Atom* atom, uint8_t type, uint8_t other, uint16_t desc,
>> + uint32_t value, StringRef str)
>> + : atom(atom), type(type), other(other), desc(desc), value(value),
>> + str(str) {}
>> +
>> + const class Atom* atom;
>> + uint8_t type;
>> + uint8_t other;
>> + uint16_t desc;
>> + uint32_t value;
>> + StringRef str;
>> +};
>> +
>> +inline raw_ostream& operator<<(raw_ostream &os, Stab &s) {
>> + os << "Stab -- atom: " << llvm::format("%p", s.atom) << ", type: " <<
>> (uint32_t)s.type
>> + << ", other: " << (uint32_t)s.other << ", desc: " << s.desc << ",
>> value: " << s.value
>> + << ", str: '" << s.str << "'";
>> + return os;
>> +}
>> +
>> +class StabsDebugInfo : public DebugInfo {
>> +public:
>> +
>> + typedef std::vector<Stab> StabsList;
>> +
>> + StabsDebugInfo(StabsList stabs)
>> + : DebugInfo(Kind::Stabs), _stabs(std::move(stabs)) {}
>> +
>> + static inline bool classof(const DebugInfo *di) {
>> + return di->kind() == Kind::Stabs;
>> + }
>> +
>> + const StabsList& stabs() const { return _stabs; }
>> +
>> +public:
>> + StabsList _stabs;
>> +};
>> +
>> +} // end namespace mach_o
>> +} // end namespace lld
>> +
>> +#endif // LLD_READER_WRITER_MACHO_DEBUGINFO_H
>>
>> Modified: lld/trunk/lib/ReaderWriter/MachO/File.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/File.h?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/File.h (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/File.h Wed Jul 27 16:31:25 2016
>> @@ -11,11 +11,13 @@
>> #define LLD_READER_WRITER_MACHO_FILE_H
>>
>> #include "Atoms.h"
>> +#include "DebugInfo.h"
>> #include "MachONormalizedFile.h"
>> #include "lld/Core/SharedLibraryFile.h"
>> #include "lld/Core/Simple.h"
>> #include "llvm/ADT/DenseMap.h"
>> #include "llvm/ADT/StringMap.h"
>> +#include "llvm/Support/Format.h"
>> #include <unordered_map>
>>
>> namespace lld {
>> @@ -25,11 +27,15 @@ using lld::mach_o::normalized::Section;
>>
>> class MachOFile : public SimpleFile {
>> public:
>> +
>> + /// Real file constructor - for on-disk files.
>> MachOFile(std::unique_ptr<MemoryBuffer> mb, MachOLinkingContext *ctx)
>> : SimpleFile(mb->getBufferIdentifier(), File::kindMachObject),
>> _mb(std::move(mb)), _ctx(ctx) {}
>>
>> - MachOFile(StringRef path) : SimpleFile(path, File::kindMachObject) {}
>> + /// Dummy file constructor - for virtual files.
>> + MachOFile(StringRef path)
>> + : SimpleFile(path, File::kindMachObject) {}
>>
>> void addDefinedAtom(StringRef name, Atom::Scope scope,
>> DefinedAtom::ContentType type, DefinedAtom::Merge
>> merge,
>> @@ -225,6 +231,13 @@ public:
>> return F->kind() == File::kindMachObject;
>> }
>>
>> + void setDebugInfo(std::unique_ptr<DebugInfo> debugInfo) {
>> + _debugInfo = std::move(debugInfo);
>> + }
>> +
>> + DebugInfo* debugInfo() const { return _debugInfo.get(); }
>> + std::unique_ptr<DebugInfo> takeDebugInfo() { return
>> std::move(_debugInfo); }
>> +
>> protected:
>> std::error_code doParse() override {
>> // Convert binary file to normalized mach-o.
>> @@ -265,6 +278,7 @@ private:
>> MachOLinkingContext::objc_unknown;
>> uint32_t _swiftVersion = 0;
>> normalized::FileFlags _flags =
>> llvm::MachO::MH_SUBSECTIONS_VIA_SYMBOLS;
>> + std::unique_ptr<DebugInfo> _debugInfo;
>> };
>>
>> class MachODylibFile : public SharedLibraryFile {
>>
>> Modified: lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFile.h
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFile.h?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFile.h (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFile.h Wed Jul 27
>> 16:31:25 2016
>> @@ -42,6 +42,7 @@
>> #ifndef LLD_READER_WRITER_MACHO_NORMALIZE_FILE_H
>> #define LLD_READER_WRITER_MACHO_NORMALIZE_FILE_H
>>
>> +#include "DebugInfo.h"
>> #include "lld/Core/Error.h"
>> #include "lld/Core/LLVM.h"
>> #include "lld/ReaderWriter/MachOLinkingContext.h"
>> @@ -91,8 +92,22 @@ struct Relocation {
>> bool isExtern;
>> Hex32 value;
>> uint32_t symbol;
>> +
>> +#ifndef NDEBUG
>> + raw_ostream& operator<<(raw_ostream &OS) const {
>> + dump(OS);
>> + return OS;
>> + }
>> +
>> + void dump(raw_ostream &OS = llvm::dbgs()) const;
>> +#endif
>> };
>>
>> +inline raw_ostream& operator<<(raw_ostream &OS, const Relocation &R) {
>> + R.dump(OS);
>> + return OS;
>> +}
>> +
>> /// A typedef so that YAML I/O can treat this vector as a sequence.
>> typedef std::vector<Relocation> Relocations;
>>
>> @@ -226,7 +241,6 @@ struct DataInCode {
>> DataRegionType kind;
>> };
>>
>> -
>> /// A typedef so that YAML I/O can encode/decode mach_header.flags.
>> LLVM_YAML_STRONG_TYPEDEF(uint32_t, FileFlags)
>>
>> @@ -242,6 +256,7 @@ struct NormalizedFile {
>> std::vector<Symbol> localSymbols;
>> std::vector<Symbol> globalSymbols;
>> std::vector<Symbol> undefinedSymbols;
>> + std::vector<Symbol> stabsSymbols;
>>
>> // Maps to load commands with no LINKEDIT content (final linked images
>> only).
>> std::vector<DependentDylib> dependentDylibs;
>>
>> Modified:
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp
>> (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryReader.cpp
>> Wed Jul 27 16:31:25 2016
>> @@ -390,12 +390,14 @@ readBinary(std::unique_ptr<MemoryBuffer>
>> if (sin->n_strx > strSize)
>> return true;
>> sout.name = &strings[sin->n_strx];
>> - sout.type = (NListType)(sin->n_type & N_TYPE);
>> + sout.type = static_cast<NListType>(sin->n_type &
>> (N_STAB|N_TYPE));
>> sout.scope = (sin->n_type & (N_PEXT|N_EXT));
>> sout.sect = sin->n_sect;
>> sout.desc = sin->n_desc;
>> sout.value = sin->n_value;
>> - if (sout.type == N_UNDF)
>> + if (sin->n_type & N_STAB)
>> + f->stabsSymbols.push_back(sout);
>> + else if (sout.type == N_UNDF)
>> f->undefinedSymbols.push_back(sout);
>> else if (sin->n_type & N_EXT)
>> f->globalSymbols.push_back(sout);
>> @@ -429,6 +431,8 @@ readBinary(std::unique_ptr<MemoryBuffer>
>> f->undefinedSymbols.push_back(sout);
>> else if (sout.scope == (SymbolScope)N_EXT)
>> f->globalSymbols.push_back(sout);
>> + else if (sin->n_type & N_STAB)
>> + f->stabsSymbols.push_back(sout);
>> else
>> f->localSymbols.push_back(sout);
>> }
>> @@ -535,7 +539,7 @@ public:
>> loadFile(std::unique_ptr<MemoryBuffer> mb,
>> const Registry ®istry) const override {
>> std::unique_ptr<File> ret =
>> - llvm::make_unique<MachOFile>(std::move(mb), &_ctx);
>> + llvm::make_unique<MachOFile>(std::move(mb), &_ctx);
>> return std::move(ret);
>> }
>>
>>
>> Modified:
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
>> (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileBinaryWriter.cpp
>> Wed Jul 27 16:31:25 2016
>> @@ -789,8 +789,8 @@ llvm::Error MachOFileLayout::writeLoadCo
>> st->cmd = LC_SYMTAB;
>> st->cmdsize = sizeof(symtab_command);
>> st->symoff = _startOfSymbols;
>> - st->nsyms = _file.localSymbols.size() + _file.globalSymbols.size()
>> - +
>> _file.undefinedSymbols.size();
>> + st->nsyms = _file.stabsSymbols.size() + _file.localSymbols.size() +
>> + _file.globalSymbols.size() +
>> _file.undefinedSymbols.size();
>> st->stroff = _startOfSymbolStrings;
>> st->strsize = _endOfSymbolStrings - _startOfSymbolStrings;
>> if (_swap)
>> @@ -876,8 +876,8 @@ llvm::Error MachOFileLayout::writeLoadCo
>> st->cmd = LC_SYMTAB;
>> st->cmdsize = sizeof(symtab_command);
>> st->symoff = _startOfSymbols;
>> - st->nsyms = _file.localSymbols.size() + _file.globalSymbols.size()
>> - +
>> _file.undefinedSymbols.size();
>> + st->nsyms = _file.stabsSymbols.size() + _file.localSymbols.size() +
>> + _file.globalSymbols.size() +
>> _file.undefinedSymbols.size();
>> st->stroff = _startOfSymbolStrings;
>> st->strsize = _endOfSymbolStrings - _startOfSymbolStrings;
>> if (_swap)
>> @@ -890,7 +890,8 @@ llvm::Error MachOFileLayout::writeLoadCo
>> dst->cmd = LC_DYSYMTAB;
>> dst->cmdsize = sizeof(dysymtab_command);
>> dst->ilocalsym = _symbolTableLocalsStartIndex;
>> - dst->nlocalsym = _file.localSymbols.size();
>> + dst->nlocalsym = _file.stabsSymbols.size() +
>> + _file.localSymbols.size();
>> dst->iextdefsym = _symbolTableGlobalsStartIndex;
>> dst->nextdefsym = _file.globalSymbols.size();
>> dst->iundefsym = _symbolTableUndefinesStartIndex;
>> @@ -1102,6 +1103,7 @@ void MachOFileLayout::writeSymbolTable()
>> uint32_t symOffset = _startOfSymbols;
>> uint32_t strOffset = _startOfSymbolStrings;
>> _buffer[strOffset++] = '\0'; // Reserve n_strx offset of zero to mean
>> no name.
>> + appendSymbols(_file.stabsSymbols, symOffset, strOffset);
>> appendSymbols(_file.localSymbols, symOffset, strOffset);
>> appendSymbols(_file.globalSymbols, symOffset, strOffset);
>> appendSymbols(_file.undefinedSymbols, symOffset, strOffset);
>> @@ -1414,10 +1416,14 @@ void MachOFileLayout::buildExportTrie()
>> void MachOFileLayout::computeSymbolTableSizes() {
>> // MachO symbol tables have three ranges: locals, globals, and
>> undefines
>> const size_t nlistSize = (_is64 ? sizeof(nlist_64) : sizeof(nlist));
>> - _symbolTableSize = nlistSize * (_file.localSymbols.size()
>> + _symbolTableSize = nlistSize * (_file.stabsSymbols.size()
>> + + _file.localSymbols.size()
>> + _file.globalSymbols.size()
>> + _file.undefinedSymbols.size());
>> _symbolStringPoolSize = 1; // Always reserve 1-byte for the empty
>> string.
>> + for (const Symbol &sym : _file.stabsSymbols) {
>> + _symbolStringPoolSize += (sym.name.size()+1);
>> + }
>> for (const Symbol &sym : _file.localSymbols) {
>> _symbolStringPoolSize += (sym.name.size()+1);
>> }
>> @@ -1428,7 +1434,8 @@ void MachOFileLayout::computeSymbolTable
>> _symbolStringPoolSize += (sym.name.size()+1);
>> }
>> _symbolTableLocalsStartIndex = 0;
>> - _symbolTableGlobalsStartIndex = _file.localSymbols.size();
>> + _symbolTableGlobalsStartIndex = _file.stabsSymbols.size() +
>> + _file.localSymbols.size();
>> _symbolTableUndefinesStartIndex = _symbolTableGlobalsStartIndex
>> + _file.globalSymbols.size();
>>
>>
>> Modified:
>> lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileFromAtoms.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileFromAtoms.cpp?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileFromAtoms.cpp
>> (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileFromAtoms.cpp Wed
>> Jul 27 16:31:25 2016
>> @@ -22,6 +22,7 @@
>>
>> #include "MachONormalizedFile.h"
>> #include "ArchHandler.h"
>> +#include "DebugInfo.h"
>> #include "MachONormalizedFileBinaryUtils.h"
>> #include "lld/Core/Error.h"
>> #include "lld/Core/LLVM.h"
>> @@ -34,6 +35,7 @@
>> #include "llvm/Support/MachO.h"
>> #include <map>
>> #include <system_error>
>> +#include <unordered_set>
>>
>> using llvm::StringRef;
>> using llvm::isa;
>> @@ -120,6 +122,7 @@ public:
>> void copySectionInfo(NormalizedFile &file);
>> void updateSectionInfo(NormalizedFile &file);
>> void buildAtomToAddressMap();
>> + llvm::Error synthesizeDebugNotes(NormalizedFile &file);
>> llvm::Error addSymbols(const lld::File &atomFile, NormalizedFile
>> &file);
>> void addIndirectSymbols(const lld::File &atomFile, NormalizedFile
>> &file);
>> void addRebaseAndBindingInfo(const lld::File &, NormalizedFile
>> &file);
>> @@ -201,6 +204,7 @@ private:
>> bool _allSourceFilesHaveMinVersions = true;
>> LoadCommandType _minVersionCommandType =
>> (LoadCommandType)0;
>> uint32_t _minVersion = 0;
>> + std::vector<lld::mach_o::Stab> _stabs;
>> };
>>
>> Util::~Util() {
>> @@ -785,6 +789,156 @@ void Util::buildAtomToAddressMap() {
>> }
>> }
>>
>> +llvm::Error Util::synthesizeDebugNotes(NormalizedFile &file) {
>> +
>> + // Bail out early if we don't need to generate a debug map.
>> + if (_ctx.debugInfoMode() ==
>> MachOLinkingContext::DebugInfoMode::noDebugMap)
>> + return llvm::Error::success();
>> +
>> + std::vector<const DefinedAtom*> atomsNeedingDebugNotes;
>> + std::set<const mach_o::MachOFile*> filesWithStabs;
>> + bool objFileHasDwarf = false;
>> + const File *objFile = nullptr;
>> +
>> + for (SectionInfo *sect : _sectionInfos) {
>> + for (const AtomInfo &info : sect->atomsAndOffsets) {
>> + if (const DefinedAtom *atom = dyn_cast<DefinedAtom>(info.atom)) {
>> +
>> + // FIXME: No stabs/debug-notes for symbols that wouldn't be in
>> the
>> + // symbol table.
>> + // FIXME: No stabs/debug-notes for kernel dtrace probes.
>> +
>> + if (atom->contentType() == DefinedAtom::typeCFI ||
>> + atom->contentType() == DefinedAtom::typeCString)
>> + continue;
>> +
>> + // Whenever we encounter a new file, update the
>> 'objfileHasDwarf' flag.
>> + if (&info.atom->file() != objFile) {
>> + objFileHasDwarf = false;
>> + if (const mach_o::MachOFile *atomFile =
>> + dyn_cast<mach_o::MachOFile>(&info.atom->file())) {
>> + if (atomFile->debugInfo()) {
>> + if (isa<mach_o::DwarfDebugInfo>(atomFile->debugInfo()))
>> + objFileHasDwarf = true;
>> + else if
>> (isa<mach_o::StabsDebugInfo>(atomFile->debugInfo()))
>> + filesWithStabs.insert(atomFile);
>> + }
>> + }
>> + }
>> +
>> + // If this atom is from a file that needs dwarf, add it to the
>> list.
>> + if (objFileHasDwarf)
>> + atomsNeedingDebugNotes.push_back(info.atom);
>> + }
>> + }
>> + }
>> +
>> + // Sort atoms needing debug notes by file ordinal, then atom ordinal.
>> + std::sort(atomsNeedingDebugNotes.begin(), atomsNeedingDebugNotes.end(),
>> + [](const DefinedAtom *lhs, const DefinedAtom *rhs) {
>> + if (lhs->file().ordinal() != rhs->file().ordinal())
>> + return (lhs->file().ordinal() < rhs->file().ordinal());
>> + return (lhs->ordinal() < rhs->ordinal());
>> + });
>> +
>> + // FIXME: Handle <rdar://problem/17689030>: Add -add_ast_path option
>> to \
>> + // linker which add N_AST stab entry to output
>> + // See OutputFile::synthesizeDebugNotes in ObjectFile.cpp in ld64.
>> +
>> + StringRef oldFileName = "";
>> + StringRef oldDirPath = "";
>> + bool wroteStartSO = false;
>> + std::unordered_set<std::string> seenFiles;
>> + for (const DefinedAtom *atom : atomsNeedingDebugNotes) {
>> + const auto &atomFile = cast<mach_o::MachOFile>(atom->file());
>> +
>> assert(dyn_cast_or_null<lld::mach_o::DwarfDebugInfo>(atomFile.debugInfo())
>> + && "file for atom needing debug notes does not contain
>> dwarf");
>> + auto &dwarf =
>> cast<lld::mach_o::DwarfDebugInfo>(*atomFile.debugInfo());
>> +
>> + auto &tu = dwarf.translationUnitSource();
>> + StringRef newFileName = tu.name;
>> + StringRef newDirPath = tu.path;
>> +
>> + // Add an SO whenever the TU source file changes.
>> + if (newFileName != oldFileName || newDirPath != oldDirPath) {
>> + // Translation unit change, emit ending SO
>> + if (oldFileName != "")
>> + _stabs.push_back(mach_o::Stab(nullptr, N_SO, 1, 0, 0, ""));
>> +
>> + oldFileName = newFileName;
>> + oldDirPath = newDirPath;
>> +
>> + // If newDirPath doesn't end with a '/' we need to add one:
>> + if (newDirPath.back() != '/') {
>> + std::string *p = file.ownedAllocations.Allocate<std::string>();
>> + new (p) std::string();
>> + *p = (newDirPath + "/").str();
>> + newDirPath = *p;
>> + }
>> +
>> + // New translation unit, emit start SOs:
>> + _stabs.push_back(mach_o::Stab(nullptr, N_SO, 0, 0, 0, newDirPath));
>> + _stabs.push_back(mach_o::Stab(nullptr, N_SO, 0, 0, 0,
>> newFileName));
>> +
>> + // Synthesize OSO for start of file.
>> + std::string *fullPath =
>> file.ownedAllocations.Allocate<std::string>();
>> + new (fullPath) std::string();
>> + {
>> + SmallString<1024> pathBuf(atomFile.path());
>> + if (auto EC = llvm::sys::fs::make_absolute(pathBuf))
>> + return llvm::errorCodeToError(EC);
>> + *fullPath = pathBuf.str();
>> + }
>> +
>> + // Get mod time.
>> + uint32_t modTime = 0;
>> + llvm::sys::fs::file_status stat;
>> + if (!llvm::sys::fs::status(*fullPath, stat))
>> + if (llvm::sys::fs::exists(stat))
>> + modTime = stat.getLastModificationTime().toEpochTime();
>> +
>> + _stabs.push_back(mach_o::Stab(nullptr, N_OSO,
>> _ctx.getCPUSubType(), 1,
>> + modTime, *fullPath));
>> + // <rdar://problem/6337329> linker should put cpusubtype in n_sect
>> field
>> + // of nlist entry for N_OSO debug note entries.
>> + wroteStartSO = true;
>> + }
>> +
>> + if (atom->contentType() == DefinedAtom::typeCode) {
>> + // Synthesize BNSYM and start FUN stabs.
>> + _stabs.push_back(mach_o::Stab(atom, N_BNSYM, 1, 0, 0, ""));
>> + _stabs.push_back(mach_o::Stab(atom, N_FUN, 1, 0, 0, atom->name()));
>> + // Synthesize any SOL stabs needed
>> + // FIXME: add SOL stabs.
>> + _stabs.push_back(mach_o::Stab(nullptr, N_FUN, 0, 0,
>> + atom->rawContent().size(), ""));
>> + _stabs.push_back(mach_o::Stab(nullptr, N_ENSYM, 1, 0,
>> + atom->rawContent().size(), ""));
>> + } else {
>> + if (atom->scope() == Atom::scopeTranslationUnit)
>> + _stabs.push_back(mach_o::Stab(atom, N_STSYM, 1, 0, 0,
>> atom->name()));
>> + else
>> + _stabs.push_back(mach_o::Stab(nullptr, N_GSYM, 1, 0, 0,
>> atom->name()));
>> + }
>> + }
>> +
>> + // Emit ending SO if necessary.
>> + if (wroteStartSO)
>> + _stabs.push_back(mach_o::Stab(nullptr, N_SO, 1, 0, 0, ""));
>> +
>> + // Copy any stabs from .o file.
>> + for (const auto *objFile : filesWithStabs) {
>> + const auto &stabsList =
>> + cast<mach_o::StabsDebugInfo>(objFile->debugInfo())->stabs();
>> + for (auto &stab : stabsList) {
>> + // FIXME: Drop stabs whose atoms have been dead-stripped.
>> + _stabs.push_back(stab);
>> + }
>> + }
>> +
>> + return llvm::Error::success();
>> +}
>> +
>> uint16_t Util::descBits(const DefinedAtom* atom) {
>> uint16_t desc = 0;
>> switch (atom->merge()) {
>> @@ -868,10 +1022,27 @@ llvm::Error Util::getSymbolTableRegion(c
>> llvm_unreachable("atom->scope() unknown enum value");
>> }
>>
>> +
>> +
>> llvm::Error Util::addSymbols(const lld::File &atomFile,
>> NormalizedFile &file) {
>> bool rMode = (_ctx.outputMachOType() == llvm::MachO::MH_OBJECT);
>> - // Mach-O symbol table has three regions: locals, globals, undefs.
>> + // Mach-O symbol table has four regions: stabs, locals, globals,
>> undefs.
>> +
>> + // Add all stabs.
>> + for (auto &stab : _stabs) {
>> + Symbol sym;
>> + sym.type = static_cast<NListType>(stab.type);
>> + sym.scope = 0;
>> + sym.sect = stab.other;
>> + sym.desc = stab.desc;
>> + if (stab.atom)
>> + sym.value = _atomToAddress[stab.atom];
>> + else
>> + sym.value = stab.value;
>> + sym.name = stab.str;
>> + file.stabsSymbols.push_back(sym);
>> + }
>>
>> // Add all local (non-global) symbols in address order
>> std::vector<AtomAndIndex> globals;
>> @@ -1404,6 +1575,8 @@ normalizedFromAtoms(const lld::File &ato
>> util.copySectionInfo(normFile);
>> util.assignAddressesToSections(normFile);
>> util.buildAtomToAddressMap();
>> + if (auto err = util.synthesizeDebugNotes(normFile))
>> + return std::move(err);
>> util.updateSectionInfo(normFile);
>> util.copySectionContent(normFile);
>> if (auto ec = util.addSymbols(atomFile, normFile)) {
>>
>> Modified: lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileToAtoms.cpp
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileToAtoms.cpp?rev=276921&r1=276920&r2=276921&view=diff
>>
>> ==============================================================================
>> --- lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileToAtoms.cpp
>> (original)
>> +++ lld/trunk/lib/ReaderWriter/MachO/MachONormalizedFileToAtoms.cpp Wed
>> Jul 27 16:31:25 2016
>> @@ -27,7 +27,11 @@
>> #include "MachONormalizedFileBinaryUtils.h"
>> #include "lld/Core/Error.h"
>> #include "lld/Core/LLVM.h"
>> +#include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
>> +#include "llvm/Support/DataExtractor.h"
>> #include "llvm/Support/Debug.h"
>> +#include "llvm/Support/Dwarf.h"
>> +#include "llvm/Support/Error.h"
>> #include "llvm/Support/Format.h"
>> #include "llvm/Support/MachO.h"
>> #include "llvm/Support/LEB128.h"
>> @@ -499,7 +503,7 @@ const Section* findSectionCoveringAddres
>>
>> const MachODefinedAtom *
>> findAtomCoveringAddress(const NormalizedFile &normalizedFile, MachOFile
>> &file,
>> - uint64_t addr, Reference::Addend *addend) {
>> + uint64_t addr, Reference::Addend &addend) {
>> const Section *sect = nullptr;
>> sect = findSectionCoveringAddress(normalizedFile, addr);
>> if (!sect)
>> @@ -509,7 +513,7 @@ findAtomCoveringAddress(const Normalized
>> uint64_t offsetInSect = addr - sect->address;
>> auto atom =
>> file.findAtomCoveringAddress(*sect, offsetInSect, &offsetInTarget);
>> - *addend = offsetInTarget;
>> + addend = offsetInTarget;
>> return atom;
>> }
>>
>> @@ -548,19 +552,23 @@ llvm::Error convertRelocs(const Section
>> -> llvm::Error {
>> // Find symbol from index.
>> const Symbol *sym = nullptr;
>> + uint32_t numStabs = normalizedFile.stabsSymbols.size();
>> uint32_t numLocal = normalizedFile.localSymbols.size();
>> uint32_t numGlobal = normalizedFile.globalSymbols.size();
>> uint32_t numUndef = normalizedFile.undefinedSymbols.size();
>> - if (symbolIndex < numLocal) {
>> - sym = &normalizedFile.localSymbols[symbolIndex];
>> - } else if (symbolIndex < numLocal+numGlobal) {
>> - sym = &normalizedFile.globalSymbols[symbolIndex-numLocal];
>> - } else if (symbolIndex < numLocal+numGlobal+numUndef) {
>> - sym =
>> &normalizedFile.undefinedSymbols[symbolIndex-numLocal-numGlobal];
>> + assert(symbolIndex >= numStabs && "Searched for stab via
>> atomBySymbol?");
>> + if (symbolIndex < numStabs+numLocal) {
>> + sym = &normalizedFile.localSymbols[symbolIndex-numStabs];
>> + } else if (symbolIndex < numStabs+numLocal+numGlobal) {
>> + sym = &normalizedFile.globalSymbols[symbolIndex-numStabs-numLocal];
>> + } else if (symbolIndex < numStabs+numLocal+numGlobal+numUndef) {
>> + sym =
>> &normalizedFile.undefinedSymbols[symbolIndex-numStabs-numLocal-
>> + numGlobal];
>> } else {
>> return llvm::make_error<GenericError>(Twine("symbol index (")
>> + Twine(symbolIndex) + ") out of
>> range");
>> }
>> +
>> // Find atom from symbol.
>> if ((sym->type & N_TYPE) == N_SECT) {
>> if (sym->sect > normalizedFile.sections.size())
>> @@ -685,6 +693,296 @@ bool isDebugInfoSection(const Section &s
>> return section.segmentName.equals("__DWARF");
>> }
>>
>> +static const Atom* findDefinedAtomByName(MachOFile &file, Twine name) {
>> + std::string strName = name.str();
>> + for (auto *atom : file.defined())
>> + if (atom->name() == strName)
>> + return atom;
>> + return nullptr;
>> +}
>> +
>> +static StringRef copyDebugString(StringRef str, BumpPtrAllocator &alloc)
>> {
>> + std::string *strCopy = alloc.Allocate<std::string>();
>> + *strCopy = str;
>> + return *strCopy;
>> +}
>> +
>> +llvm::Error parseStabs(MachOFile &file,
>> + const NormalizedFile &normalizedFile,
>> + bool copyRefs) {
>> +
>> + if (normalizedFile.stabsSymbols.empty())
>> + return llvm::Error::success();
>> +
>> + // FIXME: Kill this off when we can move to sane yaml parsing.
>> + std::unique_ptr<BumpPtrAllocator> allocator;
>> + if (copyRefs)
>> + allocator = llvm::make_unique<BumpPtrAllocator>();
>> +
>> + enum { start, inBeginEnd } state = start;
>> +
>> + const Atom *currentAtom = nullptr;
>> + uint64_t currentAtomAddress = 0;
>> + StabsDebugInfo::StabsList stabsList;
>> + for (const auto &stabSym : normalizedFile.stabsSymbols) {
>> + Stab stab(nullptr, stabSym.type, stabSym.sect, stabSym.desc,
>> + stabSym.value, stabSym.name);
>> + switch (state) {
>> + case start:
>> + switch (static_cast<StabType>(stabSym.type)) {
>> + case N_BNSYM:
>> + state = inBeginEnd;
>> + currentAtomAddress = stabSym.value;
>> + Reference::Addend addend;
>> + currentAtom = findAtomCoveringAddress(normalizedFile, file,
>> + currentAtomAddress,
>> addend);
>> + if (addend != 0)
>> + return llvm::make_error<GenericError>(
>> + "Non-zero addend for BNSYM '" + stabSym.name + "' in
>> " +
>> + file.path());
>> + if (currentAtom)
>> + stab.atom = currentAtom;
>> + else {
>> + // FIXME: ld64 just issues a warning here - should we match
>> that?
>> + return llvm::make_error<GenericError>(
>> + "can't find atom for stabs BNSYM at " +
>> + Twine::utohexstr(stabSym.value) + " in " +
>> file.path());
>> + }
>> + break;
>> + case N_SO:
>> + case N_OSO:
>> + // Not associated with an atom, just copy.
>> + if (copyRefs)
>> + stab.str = copyDebugString(stabSym.name, *allocator);
>> + else
>> + stab.str = stabSym.name;
>> + break;
>> + case N_GSYM: {
>> + auto colonIdx = stabSym.name.find(':');
>> + if (colonIdx != StringRef::npos) {
>> + StringRef name = stabSym.name.substr(0, colonIdx);
>> + currentAtom = findDefinedAtomByName(file, "_" + name);
>> + stab.atom = currentAtom;
>> + if (copyRefs)
>> + stab.str = copyDebugString(stabSym.name, *allocator);
>> + else
>> + stab.str = stabSym.name;
>> + } else {
>> + currentAtom = findDefinedAtomByName(file, stabSym.name);
>> + stab.atom = currentAtom;
>> + if (copyRefs)
>> + stab.str = copyDebugString(stabSym.name, *allocator);
>> + else
>> + stab.str = stabSym.name;
>> + }
>> + if (stab.atom == nullptr)
>> + return llvm::make_error<GenericError>(
>> + "can't find atom for N_GSYM stabs" + stabSym.name +
>> + " in " + file.path());
>> + break;
>> + }
>> + case N_FUN:
>> + return llvm::make_error<GenericError>(
>> + "old-style N_FUN stab '" + stabSym.name + "'
>> unsupported");
>> + default:
>> + return llvm::make_error<GenericError>(
>> + "unrecognized stab symbol '" + stabSym.name + "'");
>> + }
>> + break;
>> + case inBeginEnd:
>> + stab.atom = currentAtom;
>> + switch (static_cast<StabType>(stabSym.type)) {
>> + case N_ENSYM:
>> + state = start;
>> + currentAtom = nullptr;
>> + break;
>> + case N_FUN:
>> + // Just copy the string.
>> + if (copyRefs)
>> + stab.str = copyDebugString(stabSym.name, *allocator);
>> + else
>> + stab.str = stabSym.name;
>> + break;
>> + default:
>> + return llvm::make_error<GenericError>(
>> + "unrecognized stab symbol '" + stabSym.name + "'");
>> + }
>> + }
>> + llvm::dbgs() << "Adding to stabsList: " << stab << "\n";
>> + stabsList.push_back(stab);
>> + }
>> +
>> +
>> file.setDebugInfo(llvm::make_unique<StabsDebugInfo>(std::move(stabsList)));
>> +
>> + // FIXME: Kill this off when we fix YAML memory ownership.
>> + file.debugInfo()->setAllocator(std::move(allocator));
>> +
>> + return llvm::Error::success();
>> +}
>> +
>> +static llvm::DataExtractor
>> +dataExtractorFromSection(const NormalizedFile &normalizedFile,
>> + const Section &S) {
>> + const bool is64 = MachOLinkingContext::is64Bit(normalizedFile.arch);
>> + const bool isBig =
>> MachOLinkingContext::isBigEndian(normalizedFile.arch);
>> + StringRef SecData(reinterpret_cast<const char*>(S.content.data()),
>> + S.content.size());
>> + return llvm::DataExtractor(SecData, !isBig, is64 ? 8 : 4);
>> +}
>> +
>> +// FIXME: Cribbed from llvm-dwp -- should share "lightweight CU DIE
>> +// inspection" code if possible.
>> +static uint32_t getCUAbbrevOffset(llvm::DataExtractor abbrevData,
>> + uint64_t abbrCode) {
>> + uint64_t curCode;
>> + uint32_t offset = 0;
>> + while ((curCode = abbrevData.getULEB128(&offset)) != abbrCode) {
>> + // Tag
>> + abbrevData.getULEB128(&offset);
>> + // DW_CHILDREN
>> + abbrevData.getU8(&offset);
>> + // Attributes
>> + while (abbrevData.getULEB128(&offset) |
>> abbrevData.getULEB128(&offset))
>> + ;
>> + }
>> + return offset;
>> +}
>> +
>> +// FIXME: Cribbed from llvm-dwp -- should share "lightweight CU DIE
>> +// inspection" code if possible.
>> +static Expected<const char *>
>> +getIndexedString(const NormalizedFile &normalizedFile,
>> + uint32_t form, llvm::DataExtractor infoData,
>> + uint32_t &infoOffset, const Section &stringsSection) {
>> + if (form == llvm::dwarf::DW_FORM_string)
>> + return infoData.getCStr(&infoOffset);
>> + if (form != llvm::dwarf::DW_FORM_strp)
>> + return llvm::make_error<GenericError>(
>> + "string field encoded without DW_FORM_strp");
>> + uint32_t stringOffset = infoData.getU32(&infoOffset);
>> + llvm::DataExtractor stringsData =
>> + dataExtractorFromSection(normalizedFile, stringsSection);
>> + return stringsData.getCStr(&stringOffset);
>> +}
>> +
>> +// FIXME: Cribbed from llvm-dwp -- should share "lightweight CU DIE
>> +// inspection" code if possible.
>> +static llvm::Expected<TranslationUnitSource>
>> +readCompUnit(const NormalizedFile &normalizedFile,
>> + const Section &info,
>> + const Section &abbrev,
>> + const Section &strings,
>> + StringRef path) {
>> + // FIXME: Cribbed from llvm-dwp -- should share "lightweight CU DIE
>> + // inspection" code if possible.
>> + uint32_t offset = 0;
>> + auto infoData = dataExtractorFromSection(normalizedFile, info);
>> + uint32_t length = infoData.getU32(&offset);
>> + if (length == 0xffffffff)
>> + infoData.getU64(&offset);
>> + else if (length > 0xffffff00)
>> + return llvm::make_error<GenericError>("Malformed DWARF in " + path);
>> +
>> + uint16_t version = infoData.getU16(&offset);
>> +
>> + if (version < 2 || version > 4)
>> + return llvm::make_error<GenericError>("Unsupported DWARF version in
>> " +
>> + path);
>> +
>> + infoData.getU32(&offset); // Abbrev offset (should be zero)
>> + uint8_t addrSize = infoData.getU8(&offset);
>> +
>> + uint32_t abbrCode = infoData.getULEB128(&offset);
>> + auto abbrevData = dataExtractorFromSection(normalizedFile, abbrev);
>> + uint32_t abbrevOffset = getCUAbbrevOffset(abbrevData, abbrCode);
>> + uint64_t tag = abbrevData.getULEB128(&abbrevOffset);
>> + if (tag != llvm::dwarf::DW_TAG_compile_unit)
>> + return llvm::make_error<GenericError>("top level DIE is not a
>> compile unit");
>> + // DW_CHILDREN
>> + abbrevData.getU8(&abbrevOffset);
>> + uint32_t name;
>> + uint32_t form;
>> + TranslationUnitSource tu;
>> + while ((name = abbrevData.getULEB128(&abbrevOffset)) |
>> + (form = abbrevData.getULEB128(&abbrevOffset)) &&
>> + (name != 0 || form != 0)) {
>> + switch (name) {
>> + case llvm::dwarf::DW_AT_name: {
>> + if (auto eName = getIndexedString(normalizedFile, form, infoData,
>> offset,
>> + strings))
>> + tu.name = *eName;
>> + else
>> + return eName.takeError();
>> + break;
>> + }
>> + case llvm::dwarf::DW_AT_comp_dir: {
>> + if (auto eName = getIndexedString(normalizedFile, form, infoData,
>> offset,
>> + strings))
>> + tu.path = *eName;
>> + else
>> + return eName.takeError();
>> + break;
>> + }
>> + default:
>> + llvm::DWARFFormValue::skipValue(form, infoData, &offset, version,
>> + addrSize);
>> + }
>> + }
>> + return tu;
>> +}
>> +
>> +llvm::Error parseDebugInfo(MachOFile &file,
>> + const NormalizedFile &normalizedFile, bool
>> copyRefs) {
>> +
>> + // Find the interesting debug info sections.
>> + const Section *debugInfo = nullptr;
>> + const Section *debugAbbrev = nullptr;
>> + const Section *debugStrings = nullptr;
>> +
>> + for (auto &s : normalizedFile.sections) {
>> + if (s.segmentName == "__DWARF") {
>> + if (s.sectionName == "__debug_info")
>> + debugInfo = &s;
>> + else if (s.sectionName == "__debug_abbrev")
>> + debugAbbrev = &s;
>> + else if (s.sectionName == "__debug_str")
>> + debugStrings = &s;
>> + }
>> + }
>> +
>> + if (!debugInfo)
>> + return parseStabs(file, normalizedFile, copyRefs);
>> +
>> + if (debugInfo->content.size() == 0)
>> + return llvm::Error::success();
>> +
>> + if (debugInfo->content.size() < 12)
>> + return llvm::make_error<GenericError>("Malformed __debug_info
>> section in " +
>> + file.path() + ": too small");
>> +
>> + if (!debugAbbrev)
>> + return llvm::make_error<GenericError>("Missing __dwarf_abbrev
>> section in " +
>> + file.path());
>> +
>> + if (auto tuOrErr = readCompUnit(normalizedFile, *debugInfo,
>> *debugAbbrev,
>> + *debugStrings, file.path())) {
>> + // FIXME: Kill of allocator and code under 'copyRefs' when we fix
>> YAML
>> + // memory ownership.
>> + std::unique_ptr<BumpPtrAllocator> allocator;
>> + if (copyRefs) {
>> + allocator = llvm::make_unique<BumpPtrAllocator>();
>> + tuOrErr->name = copyDebugString(tuOrErr->name, *allocator);
>> + tuOrErr->path = copyDebugString(tuOrErr->path, *allocator);
>> + }
>> +
>> file.setDebugInfo(llvm::make_unique<DwarfDebugInfo>(std::move(*tuOrErr)));
>> + if (copyRefs)
>> + file.debugInfo()->setAllocator(std::move(allocator));
>> + } else
>> + return tuOrErr.takeError();
>> +
>> + return llvm::Error::success();
>> +}
>> +
>> static int64_t readSPtr(bool is64, bool isBig, const uint8_t *addr) {
>> if (is64)
>> return read64(addr, isBig);
>> @@ -853,7 +1151,7 @@ static llvm::Error processCIE(const Norm
>> const MachODefinedAtom *func = nullptr;
>> Reference::Addend addend;
>> func = findAtomCoveringAddress(normalizedFile, file, funcAddress,
>> - &addend);
>> + addend);
>> atom->addReference(Reference::KindNamespace::mach_o,
>> handler.kindArch(),
>> handler.unwindRefToPersonalityFunctionKind(),
>> PersonalityFunctionField, func, addend);
>> @@ -936,7 +1234,7 @@ static llvm::Error processFDE(const Norm
>> }
>> Reference::Addend addend;
>> auto *target = findAtomCoveringAddress(normalizedFile, file,
>> - targetAddress, &addend);
>> + targetAddress, addend);
>> atom->addReference(Reference::KindNamespace::mach_o,
>> handler.kindArch(),
>> refKind, refAddress, target, addend);
>>
>> @@ -1095,7 +1393,6 @@ llvm::Error parseObjCImageInfo(const Sec
>> return llvm::Error();
>> }
>>
>> -
>> /// Converts normalized mach-o file into an lld::File and lld::Atoms.
>> llvm::Expected<std::unique_ptr<lld::File>>
>> objectToAtoms(const NormalizedFile &normalizedFile, StringRef path,
>> @@ -1136,10 +1433,11 @@ normalizedObjectToAtoms(MachOFile *file,
>> // Create atoms from each section.
>> for (auto § : normalizedFile.sections) {
>> DEBUG(llvm::dbgs() << "Creating atoms: "; sect.dump());
>> +
>> + // If this is a debug-info section parse it specially.
>> if (isDebugInfoSection(sect))
>> continue;
>>
>> -
>> // If the file contains an objc_image_info struct, then we should
>> parse the
>> // ObjC flags and Swift version.
>> if (isObjCImageInfo(sect)) {
>> @@ -1248,6 +1546,10 @@ normalizedObjectToAtoms(MachOFile *file,
>> for (const DefinedAtom* defAtom : file->defined()) {
>> reinterpret_cast<const
>> SimpleDefinedAtom*>(defAtom)->sortReferences();
>> }
>> +
>> + if (auto err = parseDebugInfo(*file, normalizedFile, copyRefs))
>> + return err;
>> +
>> return llvm::Error();
>> }
>>
>> @@ -1325,6 +1627,13 @@ normalizedToAtoms(const NormalizedFile &
>> }
>>
>> #ifndef NDEBUG
>> +void Relocation::dump(llvm::raw_ostream &OS) const {
>> + OS << "Relocation (offset=" << llvm::format_hex(offset, 8, true)
>> + << ", scatered=" << scattered << ", type=" << type << ", length="
>> << length
>> + << ", pcrel=" << pcRel << ", isExtern=" << isExtern << ", value="
>> + << llvm::format_hex(value, 8, true) << ", symbol=" << symbol <<
>> ")\n";
>> +}
>> +
>> void Section::dump(llvm::raw_ostream &OS) const {
>> OS << "Section (\"" << segmentName << ", " << sectionName << "\"";
>> OS << ", addr: " << llvm::format_hex(address, 16, true);
>>
>> Added: lld/trunk/test/mach-o/debug-syms.yaml
>> URL:
>> http://llvm.org/viewvc/llvm-project/lld/trunk/test/mach-o/debug-syms.yaml?rev=276921&view=auto
>>
>> ==============================================================================
>> --- lld/trunk/test/mach-o/debug-syms.yaml (added)
>> +++ lld/trunk/test/mach-o/debug-syms.yaml Wed Jul 27 16:31:25 2016
>> @@ -0,0 +1,249 @@
>> +# RUN: lld -flavor darwin -arch x86_64 -o %t %s -lSystem && \
>> +# RUN: llvm-nm -no-sort -debug-syms %t | FileCheck %s
>> +
>> +# CHECK: 0000000000000000 - 00 0000 SO
>> /Users/lhames/Projects/lld/lld-svn-tot/scratch/
>> +# CHECK-NEXT: 0000000000000000 - 00 0000 SO hw.c
>> +# CHECK-NEXT: {{[0-9a-f]+}} - 03 0001 OSO
>> {{.*}}/test/mach-o/debug-syms.yaml
>> +# CHECK-NEXT: 0000000100000fa0 - 01 0000 BNSYM
>> +# CHECK-NEXT: 0000000100000fa0 - 01 0000 FUN _main
>> +# CHECK-NEXT: 0000000000000016 - 00 0000 FUN
>> +# CHECK-NEXT: 0000000000000016 - 01 0000 ENSYM
>> +# CHECK-NEXT: 0000000000000000 - 01 0000 SO
>> +
>> +--- !mach-o
>> +arch: x86_64
>> +file-type: MH_OBJECT
>> +flags: [ MH_SUBSECTIONS_VIA_SYMBOLS ]
>> +compat-version: 0.0
>> +current-version: 0.0
>> +has-UUID: false
>> +OS: unknown
>> +min-os-version-kind: LC_VERSION_MIN_MACOSX
>> +sections:
>> + - segment: __TEXT
>> + section: __text
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_PURE_INSTRUCTIONS,
>> S_ATTR_SOME_INSTRUCTIONS ]
>> + alignment: 16
>> + address: 0x0000000000000000
>> + content: [ 0x55, 0x48, 0x89, 0xE5, 0x31, 0xC0, 0xC7, 0x45,
>> + 0xFC, 0x00, 0x00, 0x00, 0x00, 0x89, 0x7D, 0xF8,
>> + 0x48, 0x89, 0x75, 0xF0, 0x5D, 0xC3 ]
>> + - segment: __DWARF
>> + section: __debug_str
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x0000000000000016
>> + content: [ 0x41, 0x70, 0x70, 0x6C, 0x65, 0x20, 0x4C, 0x4C,
>> + 0x56, 0x4D, 0x20, 0x76, 0x65, 0x72, 0x73, 0x69,
>> + 0x6F, 0x6E, 0x20, 0x38, 0x2E, 0x30, 0x2E, 0x30,
>> + 0x20, 0x28, 0x63, 0x6C, 0x61, 0x6E, 0x67, 0x2D,
>> + 0x38, 0x30, 0x30, 0x2E, 0x30, 0x2E, 0x32, 0x34,
>> + 0x2E, 0x31, 0x29, 0x00, 0x68, 0x77, 0x2E, 0x63,
>> + 0x00, 0x2F, 0x55, 0x73, 0x65, 0x72, 0x73, 0x2F,
>> + 0x6C, 0x68, 0x61, 0x6D, 0x65, 0x73, 0x2F, 0x50,
>> + 0x72, 0x6F, 0x6A, 0x65, 0x63, 0x74, 0x73, 0x2F,
>> + 0x6C, 0x6C, 0x64, 0x2F, 0x6C, 0x6C, 0x64, 0x2D,
>> + 0x73, 0x76, 0x6E, 0x2D, 0x74, 0x6F, 0x74, 0x2F,
>> + 0x73, 0x63, 0x72, 0x61, 0x74, 0x63, 0x68, 0x00,
>> + 0x6D, 0x61, 0x69, 0x6E, 0x00, 0x69, 0x6E, 0x74,
>> + 0x00, 0x61, 0x72, 0x67, 0x63, 0x00, 0x61, 0x72,
>> + 0x67, 0x76, 0x00, 0x63, 0x68, 0x61, 0x72, 0x00 ]
>> + - segment: __DWARF
>> + section: __debug_loc
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x000000000000008E
>> + - segment: __DWARF
>> + section: __debug_abbrev
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x000000000000008E
>> + content: [ 0x01, 0x11, 0x01, 0x25, 0x0E, 0x13, 0x05, 0x03,
>> + 0x0E, 0x10, 0x06, 0x1B, 0x0E, 0x11, 0x01, 0x12,
>> + 0x01, 0x00, 0x00, 0x02, 0x2E, 0x01, 0x11, 0x01,
>> + 0x12, 0x01, 0x40, 0x0A, 0x03, 0x0E, 0x3A, 0x0B,
>> + 0x3B, 0x0B, 0x27, 0x0C, 0x49, 0x13, 0x3F, 0x0C,
>> + 0x00, 0x00, 0x03, 0x05, 0x00, 0x02, 0x0A, 0x03,
>> + 0x0E, 0x3A, 0x0B, 0x3B, 0x0B, 0x49, 0x13, 0x00,
>> + 0x00, 0x04, 0x24, 0x00, 0x03, 0x0E, 0x3E, 0x0B,
>> + 0x0B, 0x0B, 0x00, 0x00, 0x05, 0x0F, 0x00, 0x49,
>> + 0x13, 0x00, 0x00, 0x00 ]
>> + - segment: __DWARF
>> + section: __debug_info
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x00000000000000DA
>> + content: [ 0x7F, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
>> + 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x00, 0x00,
>> + 0x0C, 0x00, 0x2C, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x00, 0x00, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
>> + 0x56, 0x60, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01,
>> + 0x6A, 0x00, 0x00, 0x00, 0x01, 0x03, 0x02, 0x91,
>> + 0x78, 0x69, 0x00, 0x00, 0x00, 0x01, 0x01, 0x6A,
>> + 0x00, 0x00, 0x00, 0x03, 0x02, 0x91, 0x70, 0x6E,
>> + 0x00, 0x00, 0x00, 0x01, 0x01, 0x71, 0x00, 0x00,
>> + 0x00, 0x00, 0x04, 0x65, 0x00, 0x00, 0x00, 0x05,
>> + 0x04, 0x05, 0x76, 0x00, 0x00, 0x00, 0x05, 0x7B,
>> + 0x00, 0x00, 0x00, 0x04, 0x73, 0x00, 0x00, 0x00,
>> + 0x06, 0x01, 0x00 ]
>> + relocations:
>> + - offset: 0x00000037
>> + type: X86_64_RELOC_UNSIGNED
>> + length: 3
>> + pc-rel: false
>> + extern: false
>> + symbol: 1
>> + - offset: 0x0000002F
>> + type: X86_64_RELOC_UNSIGNED
>> + length: 3
>> + pc-rel: false
>> + extern: false
>> + symbol: 1
>> + - offset: 0x00000026
>> + type: X86_64_RELOC_UNSIGNED
>> + length: 3
>> + pc-rel: false
>> + extern: false
>> + symbol: 1
>> + - offset: 0x0000001E
>> + type: X86_64_RELOC_UNSIGNED
>> + length: 3
>> + pc-rel: false
>> + extern: false
>> + symbol: 1
>> + - segment: __DWARF
>> + section: __debug_ranges
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x000000000000015D
>> + - segment: __DWARF
>> + section: __debug_macinfo
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x000000000000015D
>> + content: [ 0x00 ]
>> + - segment: __DWARF
>> + section: __apple_names
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x000000000000015E
>> + content: [ 0x48, 0x53, 0x41, 0x48, 0x01, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
>> + 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x06, 0x00,
>> + 0x00, 0x00, 0x00, 0x00, 0x6A, 0x7F, 0x9A, 0x7C,
>> + 0x2C, 0x00, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x2E, 0x00, 0x00, 0x00,
>> + 0x00, 0x00, 0x00, 0x00 ]
>> + - segment: __DWARF
>> + section: __apple_objc
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x000000000000019A
>> + content: [ 0x48, 0x53, 0x41, 0x48, 0x01, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x06, 0x00,
>> + 0xFF, 0xFF, 0xFF, 0xFF ]
>> + - segment: __DWARF
>> + section: __apple_namespac
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x00000000000001BE
>> + content: [ 0x48, 0x53, 0x41, 0x48, 0x01, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x06, 0x00,
>> + 0xFF, 0xFF, 0xFF, 0xFF ]
>> + - segment: __DWARF
>> + section: __apple_types
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x00000000000001E2
>> + content: [ 0x48, 0x53, 0x41, 0x48, 0x01, 0x00, 0x00, 0x00,
>> + 0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
>> + 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x03, 0x00, 0x00, 0x00, 0x01, 0x00, 0x06, 0x00,
>> + 0x03, 0x00, 0x05, 0x00, 0x04, 0x00, 0x0B, 0x00,
>> + 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
>> + 0x30, 0x80, 0x88, 0x0B, 0x63, 0x20, 0x95, 0x7C,
>> + 0x40, 0x00, 0x00, 0x00, 0x53, 0x00, 0x00, 0x00,
>> + 0x65, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
>> + 0x6A, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00,
>> + 0x00, 0x00, 0x00, 0x73, 0x00, 0x00, 0x00, 0x01,
>> + 0x00, 0x00, 0x00, 0x7B, 0x00, 0x00, 0x00, 0x24,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ]
>> + - segment: __DWARF
>> + section: __apple_exttypes
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x0000000000000248
>> + content: [ 0x48, 0x53, 0x41, 0x48, 0x01, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x01, 0x00, 0x00, 0x00, 0x07, 0x00, 0x06, 0x00,
>> + 0xFF, 0xFF, 0xFF, 0xFF ]
>> + - segment: __LD
>> + section: __compact_unwind
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + alignment: 8
>> + address: 0x0000000000000270
>> + content: [ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ]
>> + relocations:
>> + - offset: 0x00000000
>> + type: X86_64_RELOC_UNSIGNED
>> + length: 3
>> + pc-rel: false
>> + extern: false
>> + symbol: 1
>> + - segment: __TEXT
>> + section: __eh_frame
>> + type: S_COALESCED
>> + attributes: [ ]
>> + alignment: 8
>> + address: 0x0000000000000290
>> + content: [ 0x14, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x01, 0x7A, 0x52, 0x00, 0x01, 0x78, 0x10, 0x01,
>> + 0x10, 0x0C, 0x07, 0x08, 0x90, 0x01, 0x00, 0x00,
>> + 0x24, 0x00, 0x00, 0x00, 0x1C, 0x00, 0x00, 0x00,
>> + 0x50, 0xFD, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
>> + 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x00, 0x41, 0x0E, 0x10, 0x86, 0x02, 0x43, 0x0D,
>> + 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ]
>> + - segment: __DWARF
>> + section: __debug_line
>> + type: S_REGULAR
>> + attributes: [ S_ATTR_DEBUG ]
>> + address: 0x00000000000002D0
>> + content: [ 0x37, 0x00, 0x00, 0x00, 0x02, 0x00, 0x1B, 0x00,
>> + 0x00, 0x00, 0x01, 0x01, 0xFB, 0x0E, 0x0D, 0x00,
>> + 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x01,
>> + 0x00, 0x00, 0x01, 0x00, 0x68, 0x77, 0x2E, 0x63,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x02,
>> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
>> + 0x01, 0x05, 0x03, 0x0A, 0x08, 0x3D, 0x02, 0x02,
>> + 0x00, 0x01, 0x01 ]
>> + relocations:
>> + - offset: 0x00000028
>> + type: X86_64_RELOC_UNSIGNED
>> + length: 3
>> + pc-rel: false
>> + extern: false
>> + symbol: 1
>> +global-symbols:
>> + - name: _main
>> + type: N_SECT
>> + scope: [ N_EXT ]
>> + sect: 1
>> + value: 0x0000000000000000
>> +page-size: 0x00000000
>> +...
>>
>>
>> _______________________________________________
>> llvm-commits mailing list
>> llvm-commits at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
>>
>
>
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