MachODump.cpp revision c6449b636f4984be88f128d0375c056ad05e7e8f 
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/Support/MachO.h"
17#include "llvm/Object/MachO.h"
18#include "llvm/ADT/OwningPtr.h"
19#include "llvm/ADT/Triple.h"
20#include "llvm/ADT/STLExtras.h"
21#include "llvm/DebugInfo/DIContext.h"
22#include "llvm/MC/MCAsmInfo.h"
23#include "llvm/MC/MCDisassembler.h"
24#include "llvm/MC/MCInst.h"
25#include "llvm/MC/MCInstPrinter.h"
26#include "llvm/MC/MCInstrAnalysis.h"
27#include "llvm/MC/MCInstrDesc.h"
28#include "llvm/MC/MCInstrInfo.h"
29#include "llvm/MC/MCRegisterInfo.h"
30#include "llvm/MC/MCSubtargetInfo.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/MemoryBuffer.h"
36#include "llvm/Support/TargetRegistry.h"
37#include "llvm/Support/TargetSelect.h"
38#include "llvm/Support/raw_ostream.h"
39#include "llvm/Support/system_error.h"
40#include <algorithm>
41#include <cstring>
42using namespace llvm;
43using namespace object;
44
45static cl::opt<bool>
46  CFG("cfg", cl::desc("Create a CFG for every symbol in the object file and"
47                      "write it to a graphviz file (MachO-only)"));
48
49static cl::opt<bool>
50  UseDbg("g", cl::desc("Print line information from debug info if available"));
51
52static cl::opt<std::string>
53  DSYMFile("dsym", cl::desc("Use .dSYM file for debug info"));
54
55static const Target *GetTarget(const MachOObject *MachOObj) {
56  // Figure out the target triple.
57  if (TripleName.empty()) {
58    llvm::Triple TT("unknown-unknown-unknown");
59    switch (MachOObj->getHeader().CPUType) {
60    case llvm::MachO::CPUTypeI386:
61      TT.setArch(Triple::ArchType(Triple::x86));
62      break;
63    case llvm::MachO::CPUTypeX86_64:
64      TT.setArch(Triple::ArchType(Triple::x86_64));
65      break;
66    case llvm::MachO::CPUTypeARM:
67      TT.setArch(Triple::ArchType(Triple::arm));
68      break;
69    case llvm::MachO::CPUTypePowerPC:
70      TT.setArch(Triple::ArchType(Triple::ppc));
71      break;
72    case llvm::MachO::CPUTypePowerPC64:
73      TT.setArch(Triple::ArchType(Triple::ppc64));
74      break;
75    }
76    TripleName = TT.str();
77  }
78
79  // Get the target specific parser.
80  std::string Error;
81  const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
82  if (TheTarget)
83    return TheTarget;
84
85  errs() << "llvm-objdump: error: unable to get target for '" << TripleName
86         << "', see --version and --triple.\n";
87  return 0;
88}
89
90struct SymbolSorter {
91  bool operator()(const SymbolRef &A, const SymbolRef &B) {
92    SymbolRef::Type AType, BType;
93    A.getType(AType);
94    B.getType(BType);
95
96    uint64_t AAddr, BAddr;
97    if (AType != SymbolRef::ST_Function)
98      AAddr = 0;
99    else
100      A.getAddress(AAddr);
101    if (BType != SymbolRef::ST_Function)
102      BAddr = 0;
103    else
104      B.getAddress(BAddr);
105    return AAddr < BAddr;
106  }
107};
108
109// Print additional information about an address, if available.
110static void DumpAddress(uint64_t Address, ArrayRef<SectionRef> Sections,
111                        MachOObject *MachOObj, raw_ostream &OS) {
112  for (unsigned i = 0; i != Sections.size(); ++i) {
113    uint64_t SectAddr = 0, SectSize = 0;
114    Sections[i].getAddress(SectAddr);
115    Sections[i].getSize(SectSize);
116    uint64_t addr = SectAddr;
117    if (SectAddr <= Address &&
118        SectAddr + SectSize > Address) {
119      StringRef bytes, name;
120      Sections[i].getContents(bytes);
121      Sections[i].getName(name);
122      // Print constant strings.
123      if (!name.compare("__cstring"))
124        OS << '"' << bytes.substr(addr, bytes.find('\0', addr)) << '"';
125      // Print constant CFStrings.
126      if (!name.compare("__cfstring"))
127        OS << "@\"" << bytes.substr(addr, bytes.find('\0', addr)) << '"';
128    }
129  }
130}
131
132typedef std::map<uint64_t, MCFunction*> FunctionMapTy;
133typedef SmallVector<MCFunction, 16> FunctionListTy;
134static void createMCFunctionAndSaveCalls(StringRef Name,
135                                         const MCDisassembler *DisAsm,
136                                         MemoryObject &Object, uint64_t Start,
137                                         uint64_t End,
138                                         MCInstrAnalysis *InstrAnalysis,
139                                         uint64_t Address,
140                                         raw_ostream &DebugOut,
141                                         FunctionMapTy &FunctionMap,
142                                         FunctionListTy &Functions) {
143  SmallVector<uint64_t, 16> Calls;
144  MCFunction f =
145    MCFunction::createFunctionFromMC(Name, DisAsm, Object, Start, End,
146                                     InstrAnalysis, DebugOut, Calls);
147  Functions.push_back(f);
148  FunctionMap[Address] = &Functions.back();
149
150  // Add the gathered callees to the map.
151  for (unsigned i = 0, e = Calls.size(); i != e; ++i)
152    FunctionMap.insert(std::make_pair(Calls[i], (MCFunction*)0));
153}
154
155// Write a graphviz file for the CFG inside an MCFunction.
156static void emitDOTFile(const char *FileName, const MCFunction &f,
157                        MCInstPrinter *IP) {
158  // Start a new dot file.
159  std::string Error;
160  raw_fd_ostream Out(FileName, Error);
161  if (!Error.empty()) {
162    errs() << "llvm-objdump: warning: " << Error << '\n';
163    return;
164  }
165
166  Out << "digraph " << f.getName() << " {\n";
167  Out << "graph [ rankdir = \"LR\" ];\n";
168  for (MCFunction::iterator i = f.begin(), e = f.end(); i != e; ++i) {
169    bool hasPreds = false;
170    // Only print blocks that have predecessors.
171    // FIXME: Slow.
172    for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
173        ++pi)
174      if (pi->second.contains(i->first)) {
175        hasPreds = true;
176        break;
177      }
178
179    if (!hasPreds && i != f.begin())
180      continue;
181
182    Out << '"' << i->first << "\" [ label=\"<a>";
183    // Print instructions.
184    for (unsigned ii = 0, ie = i->second.getInsts().size(); ii != ie;
185        ++ii) {
186      // Escape special chars and print the instruction in mnemonic form.
187      std::string Str;
188      raw_string_ostream OS(Str);
189      IP->printInst(&i->second.getInsts()[ii].Inst, OS, "");
190      Out << DOT::EscapeString(OS.str()) << '|';
191    }
192    Out << "<o>\" shape=\"record\" ];\n";
193
194    // Add edges.
195    for (MCBasicBlock::succ_iterator si = i->second.succ_begin(),
196        se = i->second.succ_end(); si != se; ++si)
197      Out << i->first << ":o -> " << *si <<":a\n";
198  }
199  Out << "}\n";
200}
201
202static void getSectionsAndSymbols(const macho::Header &Header,
203                                  MachOObjectFile *MachOObj,
204                             InMemoryStruct<macho::SymtabLoadCommand> *SymtabLC,
205                                  std::vector<SectionRef> &Sections,
206                                  std::vector<SymbolRef> &Symbols,
207                                  SmallVectorImpl<uint64_t> &FoundFns) {
208  error_code ec;
209  for (symbol_iterator SI = MachOObj->begin_symbols(),
210       SE = MachOObj->end_symbols(); SI != SE; SI.increment(ec))
211    Symbols.push_back(*SI);
212
213  for (section_iterator SI = MachOObj->begin_sections(),
214       SE = MachOObj->end_sections(); SI != SE; SI.increment(ec)) {
215    SectionRef SR = *SI;
216    StringRef SectName;
217    SR.getName(SectName);
218    Sections.push_back(*SI);
219  }
220
221  for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
222    const MachOObject::LoadCommandInfo &LCI =
223       MachOObj->getObject()->getLoadCommandInfo(i);
224    if (LCI.Command.Type == macho::LCT_FunctionStarts) {
225      // We found a function starts segment, parse the addresses for later
226      // consumption.
227      InMemoryStruct<macho::LinkeditDataLoadCommand> LLC;
228      MachOObj->getObject()->ReadLinkeditDataLoadCommand(LCI, LLC);
229
230      MachOObj->getObject()->ReadULEB128s(LLC->DataOffset, FoundFns);
231    }
232  }
233}
234
235void llvm::DisassembleInputMachO(StringRef Filename) {
236  OwningPtr<MemoryBuffer> Buff;
237
238  if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
239    errs() << "llvm-objdump: " << Filename << ": " << ec.message() << "\n";
240    return;
241  }
242
243  OwningPtr<MachOObjectFile> MachOOF(static_cast<MachOObjectFile*>(
244        ObjectFile::createMachOObjectFile(Buff.take())));
245  MachOObject *MachOObj = MachOOF->getObject();
246
247  const Target *TheTarget = GetTarget(MachOObj);
248  if (!TheTarget) {
249    // GetTarget prints out stuff.
250    return;
251  }
252  OwningPtr<const MCInstrInfo> InstrInfo(TheTarget->createMCInstrInfo());
253  OwningPtr<MCInstrAnalysis>
254    InstrAnalysis(TheTarget->createMCInstrAnalysis(InstrInfo.get()));
255
256  // Set up disassembler.
257  OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
258  OwningPtr<const MCSubtargetInfo>
259    STI(TheTarget->createMCSubtargetInfo(TripleName, "", ""));
260  OwningPtr<const MCDisassembler> DisAsm(TheTarget->createMCDisassembler(*STI));
261  OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
262  int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
263  OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
264                              AsmPrinterVariant, *AsmInfo, *MRI, *STI));
265
266  if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) {
267    errs() << "error: couldn't initialize disassembler for target "
268           << TripleName << '\n';
269    return;
270  }
271
272  outs() << '\n' << Filename << ":\n\n";
273
274  const macho::Header &Header = MachOObj->getHeader();
275
276  const MachOObject::LoadCommandInfo *SymtabLCI = 0;
277  // First, find the symbol table segment.
278  for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
279    const MachOObject::LoadCommandInfo &LCI = MachOObj->getLoadCommandInfo(i);
280    if (LCI.Command.Type == macho::LCT_Symtab) {
281      SymtabLCI = &LCI;
282      break;
283    }
284  }
285
286  // Read and register the symbol table data.
287  InMemoryStruct<macho::SymtabLoadCommand> SymtabLC;
288  MachOObj->ReadSymtabLoadCommand(*SymtabLCI, SymtabLC);
289  MachOObj->RegisterStringTable(*SymtabLC);
290
291  std::vector<SectionRef> Sections;
292  std::vector<SymbolRef> Symbols;
293  SmallVector<uint64_t, 8> FoundFns;
294
295  getSectionsAndSymbols(Header, MachOOF.get(), &SymtabLC, Sections, Symbols,
296                        FoundFns);
297
298  // Make a copy of the unsorted symbol list. FIXME: duplication
299  std::vector<SymbolRef> UnsortedSymbols(Symbols);
300  // Sort the symbols by address, just in case they didn't come in that way.
301  std::sort(Symbols.begin(), Symbols.end(), SymbolSorter());
302
303#ifndef NDEBUG
304  raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
305#else
306  raw_ostream &DebugOut = nulls();
307#endif
308
309  StringRef DebugAbbrevSection, DebugInfoSection, DebugArangesSection,
310            DebugLineSection, DebugStrSection;
311  OwningPtr<DIContext> diContext;
312  OwningPtr<MachOObjectFile> DSYMObj;
313  MachOObject *DbgInfoObj = MachOObj;
314  // Try to find debug info and set up the DIContext for it.
315  if (UseDbg) {
316    ArrayRef<SectionRef> DebugSections = Sections;
317    std::vector<SectionRef> DSYMSections;
318
319    // A separate DSym file path was specified, parse it as a macho file,
320    // get the sections and supply it to the section name parsing machinery.
321    if (!DSYMFile.empty()) {
322      OwningPtr<MemoryBuffer> Buf;
323      if (error_code ec = MemoryBuffer::getFileOrSTDIN(DSYMFile.c_str(), Buf)) {
324        errs() << "llvm-objdump: " << Filename << ": " << ec.message() << '\n';
325        return;
326      }
327      DSYMObj.reset(static_cast<MachOObjectFile*>(
328            ObjectFile::createMachOObjectFile(Buf.take())));
329      const macho::Header &Header = DSYMObj->getObject()->getHeader();
330
331      std::vector<SymbolRef> Symbols;
332      SmallVector<uint64_t, 8> FoundFns;
333      getSectionsAndSymbols(Header, DSYMObj.get(), 0, DSYMSections, Symbols,
334                            FoundFns);
335      DebugSections = DSYMSections;
336      DbgInfoObj = DSYMObj.get()->getObject();
337    }
338
339    // Find the named debug info sections.
340    for (unsigned SectIdx = 0; SectIdx != DebugSections.size(); SectIdx++) {
341      StringRef SectName;
342      if (!DebugSections[SectIdx].getName(SectName)) {
343        if (SectName.equals("__DWARF,__debug_abbrev"))
344          DebugSections[SectIdx].getContents(DebugAbbrevSection);
345        else if (SectName.equals("__DWARF,__debug_info"))
346          DebugSections[SectIdx].getContents(DebugInfoSection);
347        else if (SectName.equals("__DWARF,__debug_aranges"))
348          DebugSections[SectIdx].getContents(DebugArangesSection);
349        else if (SectName.equals("__DWARF,__debug_line"))
350          DebugSections[SectIdx].getContents(DebugLineSection);
351        else if (SectName.equals("__DWARF,__debug_str"))
352          DebugSections[SectIdx].getContents(DebugStrSection);
353      }
354    }
355
356    // Setup the DIContext.
357    diContext.reset(DIContext::getDWARFContext(DbgInfoObj->isLittleEndian(),
358                                               DebugInfoSection,
359                                               DebugAbbrevSection,
360                                               DebugArangesSection,
361                                               DebugLineSection,
362                                               DebugStrSection));
363  }
364
365  FunctionMapTy FunctionMap;
366  FunctionListTy Functions;
367
368  for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) {
369    StringRef SectName;
370    if (Sections[SectIdx].getName(SectName) ||
371        SectName.compare("__TEXT,__text"))
372      continue; // Skip non-text sections
373
374    // Insert the functions from the function starts segment into our map.
375    uint64_t VMAddr;
376    Sections[SectIdx].getAddress(VMAddr);
377    for (unsigned i = 0, e = FoundFns.size(); i != e; ++i) {
378      StringRef SectBegin;
379      Sections[SectIdx].getContents(SectBegin);
380      uint64_t Offset = (uint64_t)SectBegin.data();
381      FunctionMap.insert(std::make_pair(VMAddr + FoundFns[i]-Offset,
382                                        (MCFunction*)0));
383    }
384
385    StringRef Bytes;
386    Sections[SectIdx].getContents(Bytes);
387    StringRefMemoryObject memoryObject(Bytes);
388    bool symbolTableWorked = false;
389
390    // Parse relocations.
391    std::vector<std::pair<uint64_t, SymbolRef> > Relocs;
392    error_code ec;
393    for (relocation_iterator RI = Sections[SectIdx].begin_relocations(),
394         RE = Sections[SectIdx].end_relocations(); RI != RE; RI.increment(ec)) {
395      uint64_t RelocOffset, SectionAddress;
396      RI->getAddress(RelocOffset);
397      Sections[SectIdx].getAddress(SectionAddress);
398      RelocOffset -= SectionAddress;
399
400      SymbolRef RelocSym;
401      RI->getSymbol(RelocSym);
402
403      Relocs.push_back(std::make_pair(RelocOffset, RelocSym));
404    }
405    array_pod_sort(Relocs.begin(), Relocs.end());
406
407    // Disassemble symbol by symbol.
408    for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
409      StringRef SymName;
410      Symbols[SymIdx].getName(SymName);
411
412      SymbolRef::Type ST;
413      Symbols[SymIdx].getType(ST);
414      if (ST != SymbolRef::ST_Function)
415        continue;
416
417      // Make sure the symbol is defined in this section.
418      bool containsSym = false;
419      Sections[SectIdx].containsSymbol(Symbols[SymIdx], containsSym);
420      if (!containsSym)
421        continue;
422
423      // Start at the address of the symbol relative to the section's address.
424      uint64_t SectionAddress = 0;
425      uint64_t Start = 0;
426      Sections[SectIdx].getAddress(SectionAddress);
427      Symbols[SymIdx].getAddress(Start);
428      Start -= SectionAddress;
429
430      // Stop disassembling either at the beginning of the next symbol or at
431      // the end of the section.
432      bool containsNextSym = true;
433      uint64_t NextSym = 0;
434      uint64_t NextSymIdx = SymIdx+1;
435      while (Symbols.size() > NextSymIdx) {
436        SymbolRef::Type NextSymType;
437        Symbols[NextSymIdx].getType(NextSymType);
438        if (NextSymType == SymbolRef::ST_Function) {
439          Sections[SectIdx].containsSymbol(Symbols[NextSymIdx],
440                                           containsNextSym);
441          Symbols[NextSymIdx].getAddress(NextSym);
442          NextSym -= SectionAddress;
443          break;
444        }
445        ++NextSymIdx;
446      }
447
448      uint64_t SectSize;
449      Sections[SectIdx].getSize(SectSize);
450      uint64_t End = containsNextSym ?  NextSym : SectSize;
451      uint64_t Size;
452
453      symbolTableWorked = true;
454
455      if (!CFG) {
456        // Normal disassembly, print addresses, bytes and mnemonic form.
457        StringRef SymName;
458        Symbols[SymIdx].getName(SymName);
459
460        outs() << SymName << ":\n";
461        DILineInfo lastLine;
462        for (uint64_t Index = Start; Index < End; Index += Size) {
463          MCInst Inst;
464
465          if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
466                                     DebugOut, nulls())) {
467            uint64_t SectAddress = 0;
468            Sections[SectIdx].getAddress(SectAddress);
469            outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
470
471            DumpBytes(StringRef(Bytes.data() + Index, Size));
472            IP->printInst(&Inst, outs(), "");
473
474            // Print debug info.
475            if (diContext) {
476              DILineInfo dli =
477                diContext->getLineInfoForAddress(SectAddress + Index);
478              // Print valid line info if it changed.
479              if (dli != lastLine && dli.getLine() != 0)
480                outs() << "\t## " << dli.getFileName() << ':'
481                       << dli.getLine() << ':' << dli.getColumn();
482              lastLine = dli;
483            }
484            outs() << "\n";
485          } else {
486            errs() << "llvm-objdump: warning: invalid instruction encoding\n";
487            if (Size == 0)
488              Size = 1; // skip illegible bytes
489          }
490        }
491      } else {
492        // Create CFG and use it for disassembly.
493        StringRef SymName;
494        Symbols[SymIdx].getName(SymName);
495        createMCFunctionAndSaveCalls(
496            SymName, DisAsm.get(), memoryObject, Start, End,
497            InstrAnalysis.get(), Start, DebugOut, FunctionMap, Functions);
498      }
499    }
500
501    if (CFG) {
502      if (!symbolTableWorked) {
503        // Reading the symbol table didn't work, create a big __TEXT symbol.
504        uint64_t SectSize = 0, SectAddress = 0;
505        Sections[SectIdx].getSize(SectSize);
506        Sections[SectIdx].getAddress(SectAddress);
507        createMCFunctionAndSaveCalls("__TEXT", DisAsm.get(), memoryObject,
508                                     0, SectSize,
509                                     InstrAnalysis.get(),
510                                     SectAddress, DebugOut,
511                                     FunctionMap, Functions);
512      }
513      for (std::map<uint64_t, MCFunction*>::iterator mi = FunctionMap.begin(),
514           me = FunctionMap.end(); mi != me; ++mi)
515        if (mi->second == 0) {
516          // Create functions for the remaining callees we have gathered,
517          // but we didn't find a name for them.
518          uint64_t SectSize = 0;
519          Sections[SectIdx].getSize(SectSize);
520
521          SmallVector<uint64_t, 16> Calls;
522          MCFunction f =
523            MCFunction::createFunctionFromMC("unknown", DisAsm.get(),
524                                             memoryObject, mi->first,
525                                             SectSize,
526                                             InstrAnalysis.get(), DebugOut,
527                                             Calls);
528          Functions.push_back(f);
529          mi->second = &Functions.back();
530          for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
531            std::pair<uint64_t, MCFunction*> p(Calls[i], (MCFunction*)0);
532            if (FunctionMap.insert(p).second)
533              mi = FunctionMap.begin();
534          }
535        }
536
537      DenseSet<uint64_t> PrintedBlocks;
538      for (unsigned ffi = 0, ffe = Functions.size(); ffi != ffe; ++ffi) {
539        MCFunction &f = Functions[ffi];
540        for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
541          if (!PrintedBlocks.insert(fi->first).second)
542            continue; // We already printed this block.
543
544          // We assume a block has predecessors when it's the first block after
545          // a symbol.
546          bool hasPreds = FunctionMap.find(fi->first) != FunctionMap.end();
547
548          // See if this block has predecessors.
549          // FIXME: Slow.
550          for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
551              ++pi)
552            if (pi->second.contains(fi->first)) {
553              hasPreds = true;
554              break;
555            }
556
557          uint64_t SectSize = 0, SectAddress;
558          Sections[SectIdx].getSize(SectSize);
559          Sections[SectIdx].getAddress(SectAddress);
560
561          // No predecessors, this is a data block. Print as .byte directives.
562          if (!hasPreds) {
563            uint64_t End = llvm::next(fi) == fe ? SectSize :
564                                                  llvm::next(fi)->first;
565            outs() << "# " << End-fi->first << " bytes of data:\n";
566            for (unsigned pos = fi->first; pos != End; ++pos) {
567              outs() << format("%8x:\t", SectAddress + pos);
568              DumpBytes(StringRef(Bytes.data() + pos, 1));
569              outs() << format("\t.byte 0x%02x\n", (uint8_t)Bytes[pos]);
570            }
571            continue;
572          }
573
574          if (fi->second.contains(fi->first)) // Print a header for simple loops
575            outs() << "# Loop begin:\n";
576
577          DILineInfo lastLine;
578          // Walk over the instructions and print them.
579          for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
580               ++ii) {
581            const MCDecodedInst &Inst = fi->second.getInsts()[ii];
582
583            // If there's a symbol at this address, print its name.
584            if (FunctionMap.find(SectAddress + Inst.Address) !=
585                FunctionMap.end())
586              outs() << FunctionMap[SectAddress + Inst.Address]-> getName()
587                     << ":\n";
588
589            outs() << format("%8" PRIx64 ":\t", SectAddress + Inst.Address);
590            DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
591
592            if (fi->second.contains(fi->first)) // Indent simple loops.
593              outs() << '\t';
594
595            IP->printInst(&Inst.Inst, outs(), "");
596
597            // Look for relocations inside this instructions, if there is one
598            // print its target and additional information if available.
599            for (unsigned j = 0; j != Relocs.size(); ++j)
600              if (Relocs[j].first >= SectAddress + Inst.Address &&
601                  Relocs[j].first < SectAddress + Inst.Address + Inst.Size) {
602                StringRef SymName;
603                uint64_t Addr;
604                Relocs[j].second.getAddress(Addr);
605                Relocs[j].second.getName(SymName);
606
607                outs() << "\t# " << SymName << ' ';
608                DumpAddress(Addr, Sections, MachOObj, outs());
609              }
610
611            // If this instructions contains an address, see if we can evaluate
612            // it and print additional information.
613            uint64_t targ = InstrAnalysis->evaluateBranch(Inst.Inst,
614                                                          Inst.Address,
615                                                          Inst.Size);
616            if (targ != -1ULL)
617              DumpAddress(targ, Sections, MachOObj, outs());
618
619            // Print debug info.
620            if (diContext) {
621              DILineInfo dli =
622                diContext->getLineInfoForAddress(SectAddress + Inst.Address);
623              // Print valid line info if it changed.
624              if (dli != lastLine && dli.getLine() != 0)
625                outs() << "\t## " << dli.getFileName() << ':'
626                       << dli.getLine() << ':' << dli.getColumn();
627              lastLine = dli;
628            }
629
630            outs() << '\n';
631          }
632        }
633
634        emitDOTFile((f.getName().str() + ".dot").c_str(), f, IP.get());
635      }
636    }
637  }
638}
639