tools/llvm-objdump/MachODump.cpp

   1 //===-- MachODump.cpp - Object file dumping utility for llvm --------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the MachO-specific dumper for llvm-objdump.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "llvm-objdump.h"
  15 #include "MCFunction.h"
  16 #include "llvm/ADT/OwningPtr.h"
  17 #include "llvm/ADT/STLExtras.h"
  18 #include "llvm/ADT/Triple.h"
  19 #include "llvm/DebugInfo/DIContext.h"
  20 #include "llvm/MC/MCAsmInfo.h"
  21 #include "llvm/MC/MCDisassembler.h"
  22 #include "llvm/MC/MCInst.h"
  23 #include "llvm/MC/MCInstPrinter.h"
  24 #include "llvm/MC/MCInstrAnalysis.h"
  25 #include "llvm/MC/MCInstrDesc.h"
  26 #include "llvm/MC/MCInstrInfo.h"
  27 #include "llvm/MC/MCRegisterInfo.h"
  28 #include "llvm/MC/MCSubtargetInfo.h"
  29 #include "llvm/Object/MachO.h"
  30 #include "llvm/Support/Casting.h"
  31 #include "llvm/Support/CommandLine.h"
  32 #include "llvm/Support/Debug.h"
  33 #include "llvm/Support/Format.h"
  34 #include "llvm/Support/GraphWriter.h"
  35 #include "llvm/Support/MachO.h"
  36 #include "llvm/Support/MemoryBuffer.h"
  37 #include "llvm/Support/TargetRegistry.h"
  38 #include "llvm/Support/TargetSelect.h"
  39 #include "llvm/Support/raw_ostream.h"
  40 #include "llvm/Support/system_error.h"
  41 #include <algorithm>
  42 #include <cstring>
  43 using namespace llvm;
  44 using namespace object;
  45
  46 static cl::opt<bool>
  47   CFG("cfg", cl::desc("Create a CFG for every symbol in the object file and"
  48                       " write it to a graphviz file (MachO-only)"));
  49
  50 static cl::opt<bool>
  51   UseDbg("g", cl::desc("Print line information from debug info if available"));
  52
  53 static cl::opt<std::string>
  54   DSYMFile("dsym", cl::desc("Use .dSYM file for debug info"));
  55
  56 static const Target *GetTarget(const MachOObjectFile *MachOObj) {
  57   // Figure out the target triple.
  58   if (TripleName.empty()) {
  59     llvm::Triple TT("unknown-unknown-unknown");
  60     TT.setArch(Triple::ArchType(MachOObj->getArch()));
  61     TripleName = TT.str();
  62   }
  63
  64   // Get the target specific parser.
  65   std::string Error;
  66   const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
  67   if (TheTarget)
  68     return TheTarget;
  69
  70   errs() << "llvm-objdump: error: unable to get target for '" << TripleName
  71          << "', see --version and --triple.\n";
  72   return 0;
  73 }
  74
  75 struct SymbolSorter {
  76   bool operator()(const SymbolRef &A, const SymbolRef &B) {
  77     SymbolRef::Type AType, BType;
  78     A.getType(AType);
  79     B.getType(BType);
  80
  81     uint64_t AAddr, BAddr;
  82     if (AType != SymbolRef::ST_Function)
  83       AAddr = 0;
  84     else
  85       A.getAddress(AAddr);
  86     if (BType != SymbolRef::ST_Function)
  87       BAddr = 0;
  88     else
  89       B.getAddress(BAddr);
  90     return AAddr < BAddr;
  91   }
  92 };
  93
  94 // Print additional information about an address, if available.
  95 static void DumpAddress(uint64_t Address, ArrayRef<SectionRef> Sections,
  96                         const MachOObjectFile *MachOObj, raw_ostream &OS) {
  97   for (unsigned i = 0; i != Sections.size(); ++i) {
  98     uint64_t SectAddr = 0, SectSize = 0;
  99     Sections[i].getAddress(SectAddr);
 100     Sections[i].getSize(SectSize);
 101     uint64_t addr = SectAddr;
 102     if (SectAddr <= Address &&
 103         SectAddr + SectSize > Address) {
 104       StringRef bytes, name;
 105       Sections[i].getContents(bytes);
 106       Sections[i].getName(name);
 107       // Print constant strings.
 108       if (!name.compare("__cstring"))
 109         OS << '"' << bytes.substr(addr, bytes.find('\0', addr)) << '"';
 110       // Print constant CFStrings.
 111       if (!name.compare("__cfstring"))
 112         OS << "@\"" << bytes.substr(addr, bytes.find('\0', addr)) << '"';
 113     }
 114   }
 115 }
 116
 117 typedef std::map<uint64_t, MCFunction*> FunctionMapTy;
 118 typedef SmallVector<MCFunction, 16> FunctionListTy;
 119 static void createMCFunctionAndSaveCalls(StringRef Name,
 120                                          const MCDisassembler *DisAsm,
 121                                          MemoryObject &Object, uint64_t Start,
 122                                          uint64_t End,
 123                                          MCInstrAnalysis *InstrAnalysis,
 124                                          uint64_t Address,
 125                                          raw_ostream &DebugOut,
 126                                          FunctionMapTy &FunctionMap,
 127                                          FunctionListTy &Functions) {
 128   SmallVector<uint64_t, 16> Calls;
 129   MCFunction f =
 130     MCFunction::createFunctionFromMC(Name, DisAsm, Object, Start, End,
 131                                      InstrAnalysis, DebugOut, Calls);
 132   Functions.push_back(f);
 133   FunctionMap[Address] = &Functions.back();
 134
 135   // Add the gathered callees to the map.
 136   for (unsigned i = 0, e = Calls.size(); i != e; ++i)
 137     FunctionMap.insert(std::make_pair(Calls[i], (MCFunction*)0));
 138 }
 139
 140 // Write a graphviz file for the CFG inside an MCFunction.
 141 static void emitDOTFile(const char *FileName, const MCFunction &f,
 142                         MCInstPrinter *IP) {
 143   // Start a new dot file.
 144   std::string Error;
 145   raw_fd_ostream Out(FileName, Error);
 146   if (!Error.empty()) {
 147     errs() << "llvm-objdump: warning: " << Error << '\n';
 148     return;
 149   }
 150
 151   Out << "digraph " << f.getName() << " {\n";
 152   Out << "graph [ rankdir = \"LR\" ];\n";
 153   for (MCFunction::iterator i = f.begin(), e = f.end(); i != e; ++i) {
 154     bool hasPreds = false;
 155     // Only print blocks that have predecessors.
 156     // FIXME: Slow.
 157     for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
 158         ++pi)
 159       if (pi->second.contains(i->first)) {
 160         hasPreds = true;
 161         break;
 162       }
 163
 164     if (!hasPreds && i != f.begin())
 165       continue;
 166
 167     Out << '"' << i->first << "\" [ label=\"<a>";
 168     // Print instructions.
 169     for (unsigned ii = 0, ie = i->second.getInsts().size(); ii != ie;
 170         ++ii) {
 171       // Escape special chars and print the instruction in mnemonic form.
 172       std::string Str;
 173       raw_string_ostream OS(Str);
 174       IP->printInst(&i->second.getInsts()[ii].Inst, OS, "");
 175       Out << DOT::EscapeString(OS.str()) << '|';
 176     }
 177     Out << "<o>\" shape=\"record\" ];\n";
 178
 179     // Add edges.
 180     for (MCBasicBlock::succ_iterator si = i->second.succ_begin(),
 181         se = i->second.succ_end(); si != se; ++si)
 182       Out << i->first << ":o -> " << *si <<":a\n";
 183   }
 184   Out << "}\n";
 185 }
 186
 187 static void
 188 getSectionsAndSymbols(const macho::Header Header,
 189                       MachOObjectFile *MachOObj,
 190                       std::vector<SectionRef> &Sections,
 191                       std::vector<SymbolRef> &Symbols,
 192                       SmallVectorImpl<uint64_t> &FoundFns) {
 193   error_code ec;
 194   for (symbol_iterator SI = MachOObj->begin_symbols(),
 195        SE = MachOObj->end_symbols(); SI != SE; SI.increment(ec))
 196     Symbols.push_back(*SI);
 197
 198   for (section_iterator SI = MachOObj->begin_sections(),
 199        SE = MachOObj->end_sections(); SI != SE; SI.increment(ec)) {
 200     SectionRef SR = *SI;
 201     StringRef SectName;
 202     SR.getName(SectName);
 203     Sections.push_back(*SI);
 204   }
 205
 206   MachOObjectFile::LoadCommandInfo Command =
 207     MachOObj->getFirstLoadCommandInfo();
 208   for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
 209     if (Command.C.Type == macho::LCT_FunctionStarts) {
 210       // We found a function starts segment, parse the addresses for later
 211       // consumption.
 212       macho::LinkeditDataLoadCommand LLC =
 213         MachOObj->getLinkeditDataLoadCommand(Command);
 214
 215       MachOObj->ReadULEB128s(LLC.DataOffset, FoundFns);
 216     }
 217     Command = MachOObj->getNextLoadCommandInfo(Command);
 218   }
 219 }
 220
 221 static void DisassembleInputMachO2(StringRef Filename,
 222                                    MachOObjectFile *MachOOF);
 223
 224 void llvm::DisassembleInputMachO(StringRef Filename) {
 225   OwningPtr<MemoryBuffer> Buff;
 226
 227   if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
 228     errs() << "llvm-objdump: " << Filename << ": " << ec.message() << "\n";
 229     return;
 230   }
 231
 232   OwningPtr<MachOObjectFile> MachOOF(static_cast<MachOObjectFile*>(
 233         ObjectFile::createMachOObjectFile(Buff.take())));
 234
 235   DisassembleInputMachO2(Filename, MachOOF.get());
 236 }
 237
 238 static void DisassembleInputMachO2(StringRef Filename,
 239                                    MachOObjectFile *MachOOF) {
 240   const Target *TheTarget = GetTarget(MachOOF);
 241   if (!TheTarget) {
 242     // GetTarget prints out stuff.
 243     return;
 244   }
 245   OwningPtr<const MCInstrInfo> InstrInfo(TheTarget->createMCInstrInfo());
 246   OwningPtr<MCInstrAnalysis>
 247     InstrAnalysis(TheTarget->createMCInstrAnalysis(InstrInfo.get()));
 248
 249   // Set up disassembler.
 250   OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
 251   OwningPtr<const MCSubtargetInfo>
 252     STI(TheTarget->createMCSubtargetInfo(TripleName, "", ""));
 253   OwningPtr<const MCDisassembler> DisAsm(TheTarget->createMCDisassembler(*STI));
 254   OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
 255   int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
 256   OwningPtr<MCInstPrinter>
 257     IP(TheTarget->createMCInstPrinter(AsmPrinterVariant, *AsmInfo, *InstrInfo,
 258                                       *MRI, *STI));
 259
 260   if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) {
 261     errs() << "error: couldn't initialize disassembler for target "
 262            << TripleName << '\n';
 263     return;
 264   }
 265
 266   outs() << '\n' << Filename << ":\n\n";
 267
 268   macho::Header Header = MachOOF->getHeader();
 269
 270   std::vector<SectionRef> Sections;
 271   std::vector<SymbolRef> Symbols;
 272   SmallVector<uint64_t, 8> FoundFns;
 273
 274   getSectionsAndSymbols(Header, MachOOF, Sections, Symbols, FoundFns);
 275
 276   // Make a copy of the unsorted symbol list. FIXME: duplication
 277   std::vector<SymbolRef> UnsortedSymbols(Symbols);
 278   // Sort the symbols by address, just in case they didn't come in that way.
 279   std::sort(Symbols.begin(), Symbols.end(), SymbolSorter());
 280
 281 #ifndef NDEBUG
 282   raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
 283 #else
 284   raw_ostream &DebugOut = nulls();
 285 #endif
 286
 287   OwningPtr<DIContext> diContext;
 288   ObjectFile *DbgObj = MachOOF;
 289   // Try to find debug info and set up the DIContext for it.
 290   if (UseDbg) {
 291     // A separate DSym file path was specified, parse it as a macho file,
 292     // get the sections and supply it to the section name parsing machinery.
 293     if (!DSYMFile.empty()) {
 294       OwningPtr<MemoryBuffer> Buf;
 295       if (error_code ec = MemoryBuffer::getFileOrSTDIN(DSYMFile.c_str(), Buf)) {
 296         errs() << "llvm-objdump: " << Filename << ": " << ec.message() << '\n';
 297         return;
 298       }
 299       DbgObj = ObjectFile::createMachOObjectFile(Buf.take());
 300     }
 301
 302     // Setup the DIContext
 303     diContext.reset(DIContext::getDWARFContext(DbgObj));
 304   }
 305
 306   FunctionMapTy FunctionMap;
 307   FunctionListTy Functions;
 308
 309   for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) {
 310     StringRef SectName;
 311     if (Sections[SectIdx].getName(SectName) ||
 312         SectName != "__text")
 313       continue; // Skip non-text sections
 314
 315     DataRefImpl DR = Sections[SectIdx].getRawDataRefImpl();
 316     StringRef SegmentName = MachOOF->getSectionFinalSegmentName(DR);
 317     if (SegmentName != "__TEXT")
 318       continue;
 319
 320     // Insert the functions from the function starts segment into our map.
 321     uint64_t VMAddr;
 322     Sections[SectIdx].getAddress(VMAddr);
 323     for (unsigned i = 0, e = FoundFns.size(); i != e; ++i) {
 324       StringRef SectBegin;
 325       Sections[SectIdx].getContents(SectBegin);
 326       uint64_t Offset = (uint64_t)SectBegin.data();
 327       FunctionMap.insert(std::make_pair(VMAddr + FoundFns[i]-Offset,
 328                                         (MCFunction*)0));
 329     }
 330
 331     StringRef Bytes;
 332     Sections[SectIdx].getContents(Bytes);
 333     StringRefMemoryObject memoryObject(Bytes);
 334     bool symbolTableWorked = false;
 335
 336     // Parse relocations.
 337     std::vector<std::pair<uint64_t, SymbolRef> > Relocs;
 338     error_code ec;
 339     for (relocation_iterator RI = Sections[SectIdx].begin_relocations(),
 340          RE = Sections[SectIdx].end_relocations(); RI != RE; RI.increment(ec)) {
 341       uint64_t RelocOffset, SectionAddress;
 342       RI->getAddress(RelocOffset);
 343       Sections[SectIdx].getAddress(SectionAddress);
 344       RelocOffset -= SectionAddress;
 345
 346       SymbolRef RelocSym;
 347       RI->getSymbol(RelocSym);
 348
 349       Relocs.push_back(std::make_pair(RelocOffset, RelocSym));
 350     }
 351     array_pod_sort(Relocs.begin(), Relocs.end());
 352
 353     // Disassemble symbol by symbol.
 354     for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
 355       StringRef SymName;
 356       Symbols[SymIdx].getName(SymName);
 357
 358       SymbolRef::Type ST;
 359       Symbols[SymIdx].getType(ST);
 360       if (ST != SymbolRef::ST_Function)
 361         continue;
 362
 363       // Make sure the symbol is defined in this section.
 364       bool containsSym = false;
 365       Sections[SectIdx].containsSymbol(Symbols[SymIdx], containsSym);
 366       if (!containsSym)
 367         continue;
 368
 369       // Start at the address of the symbol relative to the section's address.
 370       uint64_t SectionAddress = 0;
 371       uint64_t Start = 0;
 372       Sections[SectIdx].getAddress(SectionAddress);
 373       Symbols[SymIdx].getAddress(Start);
 374       Start -= SectionAddress;
 375
 376       // Stop disassembling either at the beginning of the next symbol or at
 377       // the end of the section.
 378       bool containsNextSym = false;
 379       uint64_t NextSym = 0;
 380       uint64_t NextSymIdx = SymIdx+1;
 381       while (Symbols.size() > NextSymIdx) {
 382         SymbolRef::Type NextSymType;
 383         Symbols[NextSymIdx].getType(NextSymType);
 384         if (NextSymType == SymbolRef::ST_Function) {
 385           Sections[SectIdx].containsSymbol(Symbols[NextSymIdx],
 386                                            containsNextSym);
 387           Symbols[NextSymIdx].getAddress(NextSym);
 388           NextSym -= SectionAddress;
 389           break;
 390         }
 391         ++NextSymIdx;
 392       }
 393
 394       uint64_t SectSize;
 395       Sections[SectIdx].getSize(SectSize);
 396       uint64_t End = containsNextSym ?  NextSym : SectSize;
 397       uint64_t Size;
 398
 399       symbolTableWorked = true;
 400
 401       if (!CFG) {
 402         // Normal disassembly, print addresses, bytes and mnemonic form.
 403         StringRef SymName;
 404         Symbols[SymIdx].getName(SymName);
 405
 406         outs() << SymName << ":\n";
 407         DILineInfo lastLine;
 408         for (uint64_t Index = Start; Index < End; Index += Size) {
 409           MCInst Inst;
 410
 411           if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
 412                                      DebugOut, nulls())) {
 413             uint64_t SectAddress = 0;
 414             Sections[SectIdx].getAddress(SectAddress);
 415             outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
 416
 417             DumpBytes(StringRef(Bytes.data() + Index, Size));
 418             IP->printInst(&Inst, outs(), "");
 419
 420             // Print debug info.
 421             if (diContext) {
 422               DILineInfo dli =
 423                 diContext->getLineInfoForAddress(SectAddress + Index);
 424               // Print valid line info if it changed.
 425               if (dli != lastLine && dli.getLine() != 0)
 426                 outs() << "\t## " << dli.getFileName() << ':'
 427                        << dli.getLine() << ':' << dli.getColumn();
 428               lastLine = dli;
 429             }
 430             outs() << "\n";
 431           } else {
 432             errs() << "llvm-objdump: warning: invalid instruction encoding\n";
 433             if (Size == 0)
 434               Size = 1; // skip illegible bytes
 435           }
 436         }
 437       } else {
 438         // Create CFG and use it for disassembly.
 439         StringRef SymName;
 440         Symbols[SymIdx].getName(SymName);
 441         createMCFunctionAndSaveCalls(
 442             SymName, DisAsm.get(), memoryObject, Start, End,
 443             InstrAnalysis.get(), Start, DebugOut, FunctionMap, Functions);
 444       }
 445     }
 446     if (!CFG && !symbolTableWorked) {
 447       // Reading the symbol table didn't work, disassemble the whole section.
 448       uint64_t SectAddress;
 449       Sections[SectIdx].getAddress(SectAddress);
 450       uint64_t SectSize;
 451       Sections[SectIdx].getSize(SectSize);
 452       uint64_t InstSize;
 453       for (uint64_t Index = 0; Index < SectSize; Index += InstSize) {
 454         MCInst Inst;
 455
 456         if (DisAsm->getInstruction(Inst, InstSize, memoryObject, Index,
 457                                    DebugOut, nulls())) {
 458           outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
 459           DumpBytes(StringRef(Bytes.data() + Index, InstSize));
 460           IP->printInst(&Inst, outs(), "");
 461           outs() << "\n";
 462         } else {
 463           errs() << "llvm-objdump: warning: invalid instruction encoding\n";
 464           if (InstSize == 0)
 465             InstSize = 1; // skip illegible bytes
 466         }
 467       }
 468     }
 469
 470     if (CFG) {
 471       if (!symbolTableWorked) {
 472         // Reading the symbol table didn't work, create a big __TEXT symbol.
 473         uint64_t SectSize = 0, SectAddress = 0;
 474         Sections[SectIdx].getSize(SectSize);
 475         Sections[SectIdx].getAddress(SectAddress);
 476         createMCFunctionAndSaveCalls("__TEXT", DisAsm.get(), memoryObject,
 477                                      0, SectSize,
 478                                      InstrAnalysis.get(),
 479                                      SectAddress, DebugOut,
 480                                      FunctionMap, Functions);
 481       }
 482       for (std::map<uint64_t, MCFunction*>::iterator mi = FunctionMap.begin(),
 483            me = FunctionMap.end(); mi != me; ++mi)
 484         if (mi->second == 0) {
 485           // Create functions for the remaining callees we have gathered,
 486           // but we didn't find a name for them.
 487           uint64_t SectSize = 0;
 488           Sections[SectIdx].getSize(SectSize);
 489
 490           SmallVector<uint64_t, 16> Calls;
 491           MCFunction f =
 492             MCFunction::createFunctionFromMC("unknown", DisAsm.get(),
 493                                              memoryObject, mi->first,
 494                                              SectSize,
 495                                              InstrAnalysis.get(), DebugOut,
 496                                              Calls);
 497           Functions.push_back(f);
 498           mi->second = &Functions.back();
 499           for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
 500             std::pair<uint64_t, MCFunction*> p(Calls[i], (MCFunction*)0);
 501             if (FunctionMap.insert(p).second)
 502               mi = FunctionMap.begin();
 503           }
 504         }
 505
 506       DenseSet<uint64_t> PrintedBlocks;
 507       for (unsigned ffi = 0, ffe = Functions.size(); ffi != ffe; ++ffi) {
 508         MCFunction &f = Functions[ffi];
 509         for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
 510           if (!PrintedBlocks.insert(fi->first).second)
 511             continue; // We already printed this block.
 512
 513           // We assume a block has predecessors when it's the first block after
 514           // a symbol.
 515           bool hasPreds = FunctionMap.find(fi->first) != FunctionMap.end();
 516
 517           // See if this block has predecessors.
 518           // FIXME: Slow.
 519           for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
 520               ++pi)
 521             if (pi->second.contains(fi->first)) {
 522               hasPreds = true;
 523               break;
 524             }
 525
 526           uint64_t SectSize = 0, SectAddress;
 527           Sections[SectIdx].getSize(SectSize);
 528           Sections[SectIdx].getAddress(SectAddress);
 529
 530           // No predecessors, this is a data block. Print as .byte directives.
 531           if (!hasPreds) {
 532             uint64_t End = llvm::next(fi) == fe ? SectSize :
 533                                                   llvm::next(fi)->first;
 534             outs() << "# " << End-fi->first << " bytes of data:\n";
 535             for (unsigned pos = fi->first; pos != End; ++pos) {
 536               outs() << format("%8x:\t", SectAddress + pos);
 537               DumpBytes(StringRef(Bytes.data() + pos, 1));
 538               outs() << format("\t.byte 0x%02x\n", (uint8_t)Bytes[pos]);
 539             }
 540             continue;
 541           }
 542
 543           if (fi->second.contains(fi->first)) // Print a header for simple loops
 544             outs() << "# Loop begin:\n";
 545
 546           DILineInfo lastLine;
 547           // Walk over the instructions and print them.
 548           for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
 549                ++ii) {
 550             const MCDecodedInst &Inst = fi->second.getInsts()[ii];
 551
 552             // If there's a symbol at this address, print its name.
 553             if (FunctionMap.find(SectAddress + Inst.Address) !=
 554                 FunctionMap.end())
 555               outs() << FunctionMap[SectAddress + Inst.Address]-> getName()
 556                      << ":\n";
 557
 558             outs() << format("%8" PRIx64 ":\t", SectAddress + Inst.Address);
 559             DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
 560
 561             if (fi->second.contains(fi->first)) // Indent simple loops.
 562               outs() << '\t';
 563
 564             IP->printInst(&Inst.Inst, outs(), "");
 565
 566             // Look for relocations inside this instructions, if there is one
 567             // print its target and additional information if available.
 568             for (unsigned j = 0; j != Relocs.size(); ++j)
 569               if (Relocs[j].first >= SectAddress + Inst.Address &&
 570                   Relocs[j].first < SectAddress + Inst.Address + Inst.Size) {
 571                 StringRef SymName;
 572                 uint64_t Addr;
 573                 Relocs[j].second.getAddress(Addr);
 574                 Relocs[j].second.getName(SymName);
 575
 576                 outs() << "\t# " << SymName << ' ';
 577                 DumpAddress(Addr, Sections, MachOOF, outs());
 578               }
 579
 580             // If this instructions contains an address, see if we can evaluate
 581             // it and print additional information.
 582             uint64_t targ = InstrAnalysis->evaluateBranch(Inst.Inst,
 583                                                           Inst.Address,
 584                                                           Inst.Size);
 585             if (targ != -1ULL)
 586               DumpAddress(targ, Sections, MachOOF, outs());
 587
 588             // Print debug info.
 589             if (diContext) {
 590               DILineInfo dli =
 591                 diContext->getLineInfoForAddress(SectAddress + Inst.Address);
 592               // Print valid line info if it changed.
 593               if (dli != lastLine && dli.getLine() != 0)
 594                 outs() << "\t## " << dli.getFileName() << ':'
 595                        << dli.getLine() << ':' << dli.getColumn();
 596               lastLine = dli;
 597             }
 598
 599             outs() << '\n';
 600           }
 601         }
 602
 603         emitDOTFile((f.getName().str() + ".dot").c_str(), f, IP.get());
 604       }
 605     }
 606   }
 607 }