MachODump.cpp revision b5b8d20ddd287992ee286bf5f4d059fd527823ad 
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/MachOObject.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/MCSubtargetInfo.h"
30#include "llvm/Support/CommandLine.h"
31#include "llvm/Support/Debug.h"
32#include "llvm/Support/Format.h"
33#include "llvm/Support/GraphWriter.h"
34#include "llvm/Support/MemoryBuffer.h"
35#include "llvm/Support/TargetRegistry.h"
36#include "llvm/Support/TargetSelect.h"
37#include "llvm/Support/raw_ostream.h"
38#include "llvm/Support/system_error.h"
39#include <algorithm>
40#include <cstring>
41using namespace llvm;
42using namespace object;
43
44static cl::opt<bool>
45  CFG("cfg", cl::desc("Create a CFG for every symbol in the object file and"
46                      "write it to a graphviz file (MachO-only)"));
47
48static cl::opt<bool>
49  UseDbg("g", cl::desc("Print line information from debug info if available"));
50
51static cl::opt<std::string>
52  DSYMFile("dsym", cl::desc("Use .dSYM file for debug info"));
53
54static const Target *GetTarget(const MachOObject *MachOObj) {
55  // Figure out the target triple.
56  llvm::Triple TT("unknown-unknown-unknown");
57  switch (MachOObj->getHeader().CPUType) {
58  case llvm::MachO::CPUTypeI386:
59    TT.setArch(Triple::ArchType(Triple::x86));
60    break;
61  case llvm::MachO::CPUTypeX86_64:
62    TT.setArch(Triple::ArchType(Triple::x86_64));
63    break;
64  case llvm::MachO::CPUTypeARM:
65    TT.setArch(Triple::ArchType(Triple::arm));
66    break;
67  case llvm::MachO::CPUTypePowerPC:
68    TT.setArch(Triple::ArchType(Triple::ppc));
69    break;
70  case llvm::MachO::CPUTypePowerPC64:
71    TT.setArch(Triple::ArchType(Triple::ppc64));
72    break;
73  }
74
75  TripleName = TT.str();
76
77  // Get the target specific parser.
78  std::string Error;
79  const Target *TheTarget = TargetRegistry::lookupTarget(TripleName, Error);
80  if (TheTarget)
81    return TheTarget;
82
83  errs() << "llvm-objdump: error: unable to get target for '" << TripleName
84         << "', see --version and --triple.\n";
85  return 0;
86}
87
88struct Section {
89  char Name[16];
90  uint64_t Address;
91  uint64_t Size;
92  uint32_t Offset;
93  uint32_t NumRelocs;
94  uint64_t RelocTableOffset;
95};
96
97struct Symbol {
98  uint64_t Value;
99  uint32_t StringIndex;
100  uint8_t SectionIndex;
101  bool operator<(const Symbol &RHS) const { return Value < RHS.Value; }
102};
103
104template <typename T>
105static Section copySection(const T &Sect) {
106  Section S;
107  memcpy(S.Name, Sect->Name, 16);
108  S.Address = Sect->Address;
109  S.Size = Sect->Size;
110  S.Offset = Sect->Offset;
111  S.NumRelocs = Sect->NumRelocationTableEntries;
112  S.RelocTableOffset = Sect->RelocationTableOffset;
113  return S;
114}
115
116template <typename T>
117static Symbol copySymbol(const T &STE) {
118  Symbol S;
119  S.StringIndex = STE->StringIndex;
120  S.SectionIndex = STE->SectionIndex;
121  S.Value = STE->Value;
122  return S;
123}
124
125// Print addtitional information about an address, if available.
126static void DumpAddress(uint64_t Address, ArrayRef<Section> Sections,
127                        MachOObject *MachOObj, raw_ostream &OS) {
128  for (unsigned i = 0; i != Sections.size(); ++i) {
129    uint64_t addr = Address-Sections[i].Address;
130    if (Sections[i].Address <= Address &&
131        Sections[i].Address + Sections[i].Size > Address) {
132      StringRef bytes = MachOObj->getData(Sections[i].Offset,
133                                          Sections[i].Size);
134      // Print constant strings.
135      if (!strcmp(Sections[i].Name, "__cstring"))
136        OS << '"' << bytes.substr(addr, bytes.find('\0', addr)) << '"';
137      // Print constant CFStrings.
138      if (!strcmp(Sections[i].Name, "__cfstring"))
139        OS << "@\"" << bytes.substr(addr, bytes.find('\0', addr)) << '"';
140    }
141  }
142}
143
144typedef std::map<uint64_t, MCFunction*> FunctionMapTy;
145typedef SmallVector<MCFunction, 16> FunctionListTy;
146static void createMCFunctionAndSaveCalls(StringRef Name,
147                                         const MCDisassembler *DisAsm,
148                                         MemoryObject &Object, uint64_t Start,
149                                         uint64_t End,
150                                         MCInstrAnalysis *InstrAnalysis,
151                                         uint64_t Address,
152                                         raw_ostream &DebugOut,
153                                         FunctionMapTy &FunctionMap,
154                                         FunctionListTy &Functions) {
155  SmallVector<uint64_t, 16> Calls;
156  MCFunction f =
157    MCFunction::createFunctionFromMC(Name, DisAsm, Object, Start, End,
158                                     InstrAnalysis, DebugOut, Calls);
159  Functions.push_back(f);
160  FunctionMap[Address] = &Functions.back();
161
162  // Add the gathered callees to the map.
163  for (unsigned i = 0, e = Calls.size(); i != e; ++i)
164    FunctionMap.insert(std::make_pair(Calls[i], (MCFunction*)0));
165}
166
167// Write a graphviz file for the CFG inside an MCFunction.
168static void emitDOTFile(const char *FileName, const MCFunction &f,
169                        MCInstPrinter *IP) {
170  // Start a new dot file.
171  std::string Error;
172  raw_fd_ostream Out(FileName, Error);
173  if (!Error.empty()) {
174    errs() << "llvm-objdump: warning: " << Error << '\n';
175    return;
176  }
177
178  Out << "digraph " << f.getName() << " {\n";
179  Out << "graph [ rankdir = \"LR\" ];\n";
180  for (MCFunction::iterator i = f.begin(), e = f.end(); i != e; ++i) {
181    bool hasPreds = false;
182    // Only print blocks that have predecessors.
183    // FIXME: Slow.
184    for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
185        ++pi)
186      if (pi->second.contains(i->first)) {
187        hasPreds = true;
188        break;
189      }
190
191    if (!hasPreds && i != f.begin())
192      continue;
193
194    Out << '"' << i->first << "\" [ label=\"<a>";
195    // Print instructions.
196    for (unsigned ii = 0, ie = i->second.getInsts().size(); ii != ie;
197        ++ii) {
198      // Escape special chars and print the instruction in mnemonic form.
199      std::string Str;
200      raw_string_ostream OS(Str);
201      IP->printInst(&i->second.getInsts()[ii].Inst, OS, "");
202      Out << DOT::EscapeString(OS.str()) << '|';
203    }
204    Out << "<o>\" shape=\"record\" ];\n";
205
206    // Add edges.
207    for (MCBasicBlock::succ_iterator si = i->second.succ_begin(),
208        se = i->second.succ_end(); si != se; ++si)
209      Out << i->first << ":o -> " << *si <<":a\n";
210  }
211  Out << "}\n";
212}
213
214static void getSectionsAndSymbols(const macho::Header &Header,
215                                  MachOObject *MachOObj,
216                             InMemoryStruct<macho::SymtabLoadCommand> *SymtabLC,
217                                  std::vector<Section> &Sections,
218                                  std::vector<Symbol> &Symbols,
219                                  SmallVectorImpl<uint64_t> &FoundFns) {
220  // Make a list of all symbols in the object file.
221  for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
222    const MachOObject::LoadCommandInfo &LCI = MachOObj->getLoadCommandInfo(i);
223    if (LCI.Command.Type == macho::LCT_Segment) {
224      InMemoryStruct<macho::SegmentLoadCommand> SegmentLC;
225      MachOObj->ReadSegmentLoadCommand(LCI, SegmentLC);
226
227      // Store the sections in this segment.
228      for (unsigned SectNum = 0; SectNum != SegmentLC->NumSections; ++SectNum) {
229        InMemoryStruct<macho::Section> Sect;
230        MachOObj->ReadSection(LCI, SectNum, Sect);
231        Sections.push_back(copySection(Sect));
232
233        // Store the symbols in this section.
234        if (SymtabLC) {
235          for (unsigned i = 0; i != (*SymtabLC)->NumSymbolTableEntries; ++i) {
236            InMemoryStruct<macho::SymbolTableEntry> STE;
237            MachOObj->ReadSymbolTableEntry((*SymtabLC)->SymbolTableOffset, i,
238                                           STE);
239            Symbols.push_back(copySymbol(STE));
240          }
241        }
242      }
243    } else if (LCI.Command.Type == macho::LCT_Segment64) {
244      InMemoryStruct<macho::Segment64LoadCommand> Segment64LC;
245      MachOObj->ReadSegment64LoadCommand(LCI, Segment64LC);
246
247      // Store the sections in this segment.
248      for (unsigned SectNum = 0; SectNum != Segment64LC->NumSections;
249          ++SectNum) {
250        InMemoryStruct<macho::Section64> Sect64;
251        MachOObj->ReadSection64(LCI, SectNum, Sect64);
252        Sections.push_back(copySection(Sect64));
253
254        // Store the symbols in this section.
255        if (SymtabLC) {
256          for (unsigned i = 0; i != (*SymtabLC)->NumSymbolTableEntries; ++i) {
257            InMemoryStruct<macho::Symbol64TableEntry> STE;
258            MachOObj->ReadSymbol64TableEntry((*SymtabLC)->SymbolTableOffset, i,
259                                             STE);
260            Symbols.push_back(copySymbol(STE));
261          }
262        }
263      }
264    } else if (LCI.Command.Type == macho::LCT_FunctionStarts) {
265      // We found a function starts segment, parse the addresses for later
266      // consumption.
267      InMemoryStruct<macho::LinkeditDataLoadCommand> LLC;
268      MachOObj->ReadLinkeditDataLoadCommand(LCI, LLC);
269
270      MachOObj->ReadULEB128s(LLC->DataOffset, FoundFns);
271    }
272  }
273}
274
275void llvm::DisassembleInputMachO(StringRef Filename) {
276  OwningPtr<MemoryBuffer> Buff;
277
278  if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
279    errs() << "llvm-objdump: " << Filename << ": " << ec.message() << "\n";
280    return;
281  }
282
283  OwningPtr<MachOObject> MachOObj(MachOObject::LoadFromBuffer(Buff.take()));
284
285  const Target *TheTarget = GetTarget(MachOObj.get());
286  if (!TheTarget) {
287    // GetTarget prints out stuff.
288    return;
289  }
290  const MCInstrInfo *InstrInfo = TheTarget->createMCInstrInfo();
291  OwningPtr<MCInstrAnalysis>
292    InstrAnalysis(TheTarget->createMCInstrAnalysis(InstrInfo));
293
294  // Set up disassembler.
295  OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
296  OwningPtr<const MCSubtargetInfo>
297    STI(TheTarget->createMCSubtargetInfo(TripleName, "", ""));
298  OwningPtr<const MCDisassembler> DisAsm(TheTarget->createMCDisassembler(*STI));
299  int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
300  OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
301                              AsmPrinterVariant, *AsmInfo, *STI));
302
303  if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) {
304    errs() << "error: couldn't initialize disassmbler for target "
305           << TripleName << '\n';
306    return;
307  }
308
309  outs() << '\n' << Filename << ":\n\n";
310
311  const macho::Header &Header = MachOObj->getHeader();
312
313  const MachOObject::LoadCommandInfo *SymtabLCI = 0;
314  // First, find the symbol table segment.
315  for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
316    const MachOObject::LoadCommandInfo &LCI = MachOObj->getLoadCommandInfo(i);
317    if (LCI.Command.Type == macho::LCT_Symtab) {
318      SymtabLCI = &LCI;
319      break;
320    }
321  }
322
323  // Read and register the symbol table data.
324  InMemoryStruct<macho::SymtabLoadCommand> SymtabLC;
325  MachOObj->ReadSymtabLoadCommand(*SymtabLCI, SymtabLC);
326  MachOObj->RegisterStringTable(*SymtabLC);
327
328  std::vector<Section> Sections;
329  std::vector<Symbol> Symbols;
330  SmallVector<uint64_t, 8> FoundFns;
331
332  getSectionsAndSymbols(Header, MachOObj.get(), &SymtabLC, Sections, Symbols,
333                        FoundFns);
334
335  // Make a copy of the unsorted symbol list. FIXME: duplication
336  std::vector<Symbol> UnsortedSymbols(Symbols);
337  // Sort the symbols by address, just in case they didn't come in that way.
338  array_pod_sort(Symbols.begin(), Symbols.end());
339
340#ifndef NDEBUG
341  raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
342#else
343  raw_ostream &DebugOut = nulls();
344#endif
345
346  StringRef DebugAbbrevSection, DebugInfoSection, DebugArangesSection,
347            DebugLineSection, DebugStrSection;
348  OwningPtr<DIContext> diContext;
349  OwningPtr<MachOObject> DSYMObj;
350  // Try to find debug info and set up the DIContext for it.
351  if (UseDbg) {
352    ArrayRef<Section> DebugSections = Sections;
353    std::vector<Section> DSYMSections;
354
355    // A separate DSym file path was specified, parse it as a macho file,
356    // get the sections and supply it to the section name parsing machinery.
357    if (!DSYMFile.empty()) {
358      OwningPtr<MemoryBuffer> Buf;
359      if (error_code ec = MemoryBuffer::getFileOrSTDIN(DSYMFile.c_str(), Buf)) {
360        errs() << "llvm-objdump: " << Filename << ": " << ec.message() << '\n';
361        return;
362      }
363      DSYMObj.reset(MachOObject::LoadFromBuffer(Buf.take()));
364      const macho::Header &Header = DSYMObj->getHeader();
365
366      std::vector<Symbol> Symbols;
367      SmallVector<uint64_t, 8> FoundFns;
368      getSectionsAndSymbols(Header, DSYMObj.get(), 0, DSYMSections, Symbols,
369                            FoundFns);
370      DebugSections = DSYMSections;
371    }
372
373    // Find the named debug info sections.
374    for (unsigned SectIdx = 0; SectIdx != DebugSections.size(); SectIdx++) {
375      if (!strcmp(DebugSections[SectIdx].Name, "__debug_abbrev"))
376        DebugAbbrevSection = DSYMObj->getData(DebugSections[SectIdx].Offset,
377                                              DebugSections[SectIdx].Size);
378      else if (!strcmp(DebugSections[SectIdx].Name, "__debug_info"))
379        DebugInfoSection = DSYMObj->getData(DebugSections[SectIdx].Offset,
380                                            DebugSections[SectIdx].Size);
381      else if (!strcmp(DebugSections[SectIdx].Name, "__debug_aranges"))
382        DebugArangesSection = DSYMObj->getData(DebugSections[SectIdx].Offset,
383                                               DebugSections[SectIdx].Size);
384      else if (!strcmp(DebugSections[SectIdx].Name, "__debug_line"))
385        DebugLineSection = DSYMObj->getData(DebugSections[SectIdx].Offset,
386                                            DebugSections[SectIdx].Size);
387      else if (!strcmp(DebugSections[SectIdx].Name, "__debug_str"))
388        DebugStrSection = DSYMObj->getData(DebugSections[SectIdx].Offset,
389                                           DebugSections[SectIdx].Size);
390    }
391
392    // Setup the DIContext.
393    diContext.reset(DIContext::getDWARFContext(MachOObj->isLittleEndian(),
394                                               DebugInfoSection,
395                                               DebugAbbrevSection,
396                                               DebugArangesSection,
397                                               DebugLineSection,
398                                               DebugStrSection));
399  }
400
401  FunctionMapTy FunctionMap;
402  FunctionListTy Functions;
403
404  for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) {
405    if (strcmp(Sections[SectIdx].Name, "__text"))
406      continue; // Skip non-text sections
407
408    // Insert the functions from the function starts segment into our map.
409    uint64_t VMAddr = Sections[SectIdx].Address - Sections[SectIdx].Offset;
410    for (unsigned i = 0, e = FoundFns.size(); i != e; ++i)
411      FunctionMap.insert(std::make_pair(FoundFns[i]+VMAddr, (MCFunction*)0));
412
413    StringRef Bytes = MachOObj->getData(Sections[SectIdx].Offset,
414                                        Sections[SectIdx].Size);
415    StringRefMemoryObject memoryObject(Bytes);
416    bool symbolTableWorked = false;
417
418    // Parse relocations.
419    std::vector<std::pair<uint64_t, uint32_t> > Relocs;
420    for (unsigned j = 0; j != Sections[SectIdx].NumRelocs; ++j) {
421      InMemoryStruct<macho::RelocationEntry> RE;
422      MachOObj->ReadRelocationEntry(Sections[SectIdx].RelocTableOffset, j, RE);
423      Relocs.push_back(std::make_pair(RE->Word0, RE->Word1 & 0xffffff));
424    }
425    array_pod_sort(Relocs.begin(), Relocs.end());
426
427    // Disassemble symbol by symbol.
428    for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
429      // Make sure the symbol is defined in this section.
430      if ((unsigned)Symbols[SymIdx].SectionIndex - 1 != SectIdx)
431        continue;
432
433      // Start at the address of the symbol relative to the section's address.
434      uint64_t Start = Symbols[SymIdx].Value - Sections[SectIdx].Address;
435      // Stop disassembling either at the beginning of the next symbol or at
436      // the end of the section.
437      uint64_t End = (SymIdx+1 == Symbols.size() ||
438          Symbols[SymIdx].SectionIndex != Symbols[SymIdx+1].SectionIndex) ?
439          Sections[SectIdx].Size :
440          Symbols[SymIdx+1].Value - Sections[SectIdx].Address;
441      uint64_t Size;
442
443      if (Start >= End)
444        continue;
445
446      symbolTableWorked = true;
447
448      if (!CFG) {
449        // Normal disassembly, print addresses, bytes and mnemonic form.
450        outs() << MachOObj->getStringAtIndex(Symbols[SymIdx].StringIndex)
451          << ":\n";
452        DILineInfo lastLine;
453        for (uint64_t Index = Start; Index < End; Index += Size) {
454          MCInst Inst;
455
456          if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
457                                     DebugOut, nulls())) {
458            outs() << format("%8llx:\t", Sections[SectIdx].Address + Index);
459            DumpBytes(StringRef(Bytes.data() + Index, Size));
460            IP->printInst(&Inst, outs(), "");
461
462            // Print debug info.
463            if (diContext) {
464              DILineInfo dli =
465                diContext->getLineInfoForAddress(Sections[SectIdx].Address +
466                                                 Index);
467              // Print valid line info if it changed.
468              if (dli != lastLine && dli.getLine() != 0)
469                outs() << "\t## " << dli.getFileName() << ':'
470                       << dli.getLine() << ':' << dli.getColumn();
471              lastLine = dli;
472            }
473            outs() << "\n";
474          } else {
475            errs() << "llvm-objdump: warning: invalid instruction encoding\n";
476            if (Size == 0)
477              Size = 1; // skip illegible bytes
478          }
479        }
480      } else {
481        // Create CFG and use it for disassembly.
482        createMCFunctionAndSaveCalls(
483            MachOObj->getStringAtIndex(Symbols[SymIdx].StringIndex),
484            DisAsm.get(), memoryObject, Start, End, InstrAnalysis.get(),
485            Start, DebugOut, FunctionMap, Functions);
486      }
487    }
488
489    if (CFG) {
490      if (!symbolTableWorked) {
491        // Reading the symbol table didn't work, create a big __TEXT symbol.
492        createMCFunctionAndSaveCalls("__TEXT", DisAsm.get(), memoryObject,
493                                     0, Sections[SectIdx].Size,
494                                     InstrAnalysis.get(),
495                                     Sections[SectIdx].Offset, DebugOut,
496                                     FunctionMap, Functions);
497      }
498      for (std::map<uint64_t, MCFunction*>::iterator mi = FunctionMap.begin(),
499           me = FunctionMap.end(); mi != me; ++mi)
500        if (mi->second == 0) {
501          // Create functions for the remaining callees we have gathered,
502          // but we didn't find a name for them.
503          SmallVector<uint64_t, 16> Calls;
504          MCFunction f =
505            MCFunction::createFunctionFromMC("unknown", DisAsm.get(),
506                                             memoryObject, mi->first,
507                                             Sections[SectIdx].Size,
508                                             InstrAnalysis.get(), DebugOut,
509                                             Calls);
510          Functions.push_back(f);
511          mi->second = &Functions.back();
512          for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
513            std::pair<uint64_t, MCFunction*> p(Calls[i], (MCFunction*)0);
514            if (FunctionMap.insert(p).second)
515              mi = FunctionMap.begin();
516          }
517        }
518
519      DenseSet<uint64_t> PrintedBlocks;
520      for (unsigned ffi = 0, ffe = Functions.size(); ffi != ffe; ++ffi) {
521        MCFunction &f = Functions[ffi];
522        for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
523          if (!PrintedBlocks.insert(fi->first).second)
524            continue; // We already printed this block.
525
526          // We assume a block has predecessors when it's the first block after
527          // a symbol.
528          bool hasPreds = FunctionMap.find(fi->first) != FunctionMap.end();
529
530          // See if this block has predecessors.
531          // FIXME: Slow.
532          for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
533              ++pi)
534            if (pi->second.contains(fi->first)) {
535              hasPreds = true;
536              break;
537            }
538
539          // No predecessors, this is a data block. Print as .byte directives.
540          if (!hasPreds) {
541            uint64_t End = llvm::next(fi) == fe ? Sections[SectIdx].Size :
542                                                  llvm::next(fi)->first;
543            outs() << "# " << End-fi->first << " bytes of data:\n";
544            for (unsigned pos = fi->first; pos != End; ++pos) {
545              outs() << format("%8x:\t", Sections[SectIdx].Address + pos);
546              DumpBytes(StringRef(Bytes.data() + pos, 1));
547              outs() << format("\t.byte 0x%02x\n", (uint8_t)Bytes[pos]);
548            }
549            continue;
550          }
551
552          if (fi->second.contains(fi->first)) // Print a header for simple loops
553            outs() << "# Loop begin:\n";
554
555          DILineInfo lastLine;
556          // Walk over the instructions and print them.
557          for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
558               ++ii) {
559            const MCDecodedInst &Inst = fi->second.getInsts()[ii];
560
561            // If there's a symbol at this address, print its name.
562            if (FunctionMap.find(Sections[SectIdx].Address + Inst.Address) !=
563                FunctionMap.end())
564              outs() << FunctionMap[Sections[SectIdx].Address + Inst.Address]->
565                                                             getName() << ":\n";
566
567            outs() << format("%8llx:\t", Sections[SectIdx].Address +
568                                         Inst.Address);
569            DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
570
571            if (fi->second.contains(fi->first)) // Indent simple loops.
572              outs() << '\t';
573
574            IP->printInst(&Inst.Inst, outs(), "");
575
576            // Look for relocations inside this instructions, if there is one
577            // print its target and additional information if availbable.
578            for (unsigned j = 0; j != Relocs.size(); ++j)
579              if (Relocs[j].first >= Sections[SectIdx].Address + Inst.Address &&
580                  Relocs[j].first < Sections[SectIdx].Address + Inst.Address +
581                                    Inst.Size) {
582                outs() << "\t# "
583                   << MachOObj->getStringAtIndex(
584                                  UnsortedSymbols[Relocs[j].second].StringIndex)
585                   << ' ';
586                DumpAddress(UnsortedSymbols[Relocs[j].second].Value, Sections,
587                            MachOObj.get(), outs());
588              }
589
590            // If this instructions contains an address, see if we can evaluate
591            // it and print additional information.
592            uint64_t targ = InstrAnalysis->evaluateBranch(Inst.Inst,
593                                                          Inst.Address,
594                                                          Inst.Size);
595            if (targ != -1ULL)
596              DumpAddress(targ, Sections, MachOObj.get(), outs());
597
598            // Print debug info.
599            if (diContext) {
600              DILineInfo dli =
601                diContext->getLineInfoForAddress(Sections[SectIdx].Address +
602                                                 Inst.Address);
603              // Print valid line info if it changed.
604              if (dli != lastLine && dli.getLine() != 0)
605                outs() << "\t## " << dli.getFileName() << ':'
606                       << dli.getLine() << ':' << dli.getColumn();
607              lastLine = dli;
608            }
609
610            outs() << '\n';
611          }
612        }
613
614        emitDOTFile((f.getName().str() + ".dot").c_str(), f, IP.get());
615      }
616    }
617  }
618}
619