MachODump.cpp revision c698a44dd27cdcf2da301e7d15c5b3703eb5d90d 
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>
264    IP(TheTarget->createMCInstPrinter(AsmPrinterVariant, *AsmInfo, *InstrInfo,
265                                      *MRI, *STI));
266
267  if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) {
268    errs() << "error: couldn't initialize disassembler for target "
269           << TripleName << '\n';
270    return;
271  }
272
273  outs() << '\n' << Filename << ":\n\n";
274
275  const macho::Header &Header = MachOObj->getHeader();
276
277  const MachOObject::LoadCommandInfo *SymtabLCI = 0;
278  // First, find the symbol table segment.
279  for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
280    const MachOObject::LoadCommandInfo &LCI = MachOObj->getLoadCommandInfo(i);
281    if (LCI.Command.Type == macho::LCT_Symtab) {
282      SymtabLCI = &LCI;
283      break;
284    }
285  }
286
287  // Read and register the symbol table data.
288  InMemoryStruct<macho::SymtabLoadCommand> SymtabLC;
289  if (SymtabLCI) {
290    MachOObj->ReadSymtabLoadCommand(*SymtabLCI, SymtabLC);
291    MachOObj->RegisterStringTable(*SymtabLC);
292  }
293
294  std::vector<SectionRef> Sections;
295  std::vector<SymbolRef> Symbols;
296  SmallVector<uint64_t, 8> FoundFns;
297
298  getSectionsAndSymbols(Header, MachOOF.get(), &SymtabLC, Sections, Symbols,
299                        FoundFns);
300
301  // Make a copy of the unsorted symbol list. FIXME: duplication
302  std::vector<SymbolRef> UnsortedSymbols(Symbols);
303  // Sort the symbols by address, just in case they didn't come in that way.
304  std::sort(Symbols.begin(), Symbols.end(), SymbolSorter());
305
306#ifndef NDEBUG
307  raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
308#else
309  raw_ostream &DebugOut = nulls();
310#endif
311
312  StringRef DebugAbbrevSection, DebugInfoSection, DebugArangesSection,
313            DebugLineSection, DebugStrSection;
314  OwningPtr<DIContext> diContext;
315  OwningPtr<MachOObjectFile> DSYMObj;
316  MachOObject *DbgInfoObj = MachOObj;
317  // Try to find debug info and set up the DIContext for it.
318  if (UseDbg) {
319    ArrayRef<SectionRef> DebugSections = Sections;
320    std::vector<SectionRef> DSYMSections;
321
322    // A separate DSym file path was specified, parse it as a macho file,
323    // get the sections and supply it to the section name parsing machinery.
324    if (!DSYMFile.empty()) {
325      OwningPtr<MemoryBuffer> Buf;
326      if (error_code ec = MemoryBuffer::getFileOrSTDIN(DSYMFile.c_str(), Buf)) {
327        errs() << "llvm-objdump: " << Filename << ": " << ec.message() << '\n';
328        return;
329      }
330      DSYMObj.reset(static_cast<MachOObjectFile*>(
331            ObjectFile::createMachOObjectFile(Buf.take())));
332      const macho::Header &Header = DSYMObj->getObject()->getHeader();
333
334      std::vector<SymbolRef> Symbols;
335      SmallVector<uint64_t, 8> FoundFns;
336      getSectionsAndSymbols(Header, DSYMObj.get(), 0, DSYMSections, Symbols,
337                            FoundFns);
338      DebugSections = DSYMSections;
339      DbgInfoObj = DSYMObj.get()->getObject();
340    }
341
342    // Find the named debug info sections.
343    for (unsigned SectIdx = 0; SectIdx != DebugSections.size(); SectIdx++) {
344      StringRef SectName;
345      if (!DebugSections[SectIdx].getName(SectName)) {
346        if (SectName.equals("__DWARF,__debug_abbrev"))
347          DebugSections[SectIdx].getContents(DebugAbbrevSection);
348        else if (SectName.equals("__DWARF,__debug_info"))
349          DebugSections[SectIdx].getContents(DebugInfoSection);
350        else if (SectName.equals("__DWARF,__debug_aranges"))
351          DebugSections[SectIdx].getContents(DebugArangesSection);
352        else if (SectName.equals("__DWARF,__debug_line"))
353          DebugSections[SectIdx].getContents(DebugLineSection);
354        else if (SectName.equals("__DWARF,__debug_str"))
355          DebugSections[SectIdx].getContents(DebugStrSection);
356      }
357    }
358
359    // Setup the DIContext.
360    diContext.reset(DIContext::getDWARFContext(DbgInfoObj->isLittleEndian(),
361                                               DebugInfoSection,
362                                               DebugAbbrevSection,
363                                               DebugArangesSection,
364                                               DebugLineSection,
365                                               DebugStrSection));
366  }
367
368  FunctionMapTy FunctionMap;
369  FunctionListTy Functions;
370
371  for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) {
372    StringRef SectName;
373    if (Sections[SectIdx].getName(SectName) ||
374        SectName.compare("__TEXT,__text"))
375      continue; // Skip non-text sections
376
377    // Insert the functions from the function starts segment into our map.
378    uint64_t VMAddr;
379    Sections[SectIdx].getAddress(VMAddr);
380    for (unsigned i = 0, e = FoundFns.size(); i != e; ++i) {
381      StringRef SectBegin;
382      Sections[SectIdx].getContents(SectBegin);
383      uint64_t Offset = (uint64_t)SectBegin.data();
384      FunctionMap.insert(std::make_pair(VMAddr + FoundFns[i]-Offset,
385                                        (MCFunction*)0));
386    }
387
388    StringRef Bytes;
389    Sections[SectIdx].getContents(Bytes);
390    StringRefMemoryObject memoryObject(Bytes);
391    bool symbolTableWorked = false;
392
393    // Parse relocations.
394    std::vector<std::pair<uint64_t, SymbolRef> > Relocs;
395    error_code ec;
396    for (relocation_iterator RI = Sections[SectIdx].begin_relocations(),
397         RE = Sections[SectIdx].end_relocations(); RI != RE; RI.increment(ec)) {
398      uint64_t RelocOffset, SectionAddress;
399      RI->getAddress(RelocOffset);
400      Sections[SectIdx].getAddress(SectionAddress);
401      RelocOffset -= SectionAddress;
402
403      SymbolRef RelocSym;
404      RI->getSymbol(RelocSym);
405
406      Relocs.push_back(std::make_pair(RelocOffset, RelocSym));
407    }
408    array_pod_sort(Relocs.begin(), Relocs.end());
409
410    // Disassemble symbol by symbol.
411    for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
412      StringRef SymName;
413      Symbols[SymIdx].getName(SymName);
414
415      SymbolRef::Type ST;
416      Symbols[SymIdx].getType(ST);
417      if (ST != SymbolRef::ST_Function)
418        continue;
419
420      // Make sure the symbol is defined in this section.
421      bool containsSym = false;
422      Sections[SectIdx].containsSymbol(Symbols[SymIdx], containsSym);
423      if (!containsSym)
424        continue;
425
426      // Start at the address of the symbol relative to the section's address.
427      uint64_t SectionAddress = 0;
428      uint64_t Start = 0;
429      Sections[SectIdx].getAddress(SectionAddress);
430      Symbols[SymIdx].getAddress(Start);
431      Start -= SectionAddress;
432
433      // Stop disassembling either at the beginning of the next symbol or at
434      // the end of the section.
435      bool containsNextSym = false;
436      uint64_t NextSym = 0;
437      uint64_t NextSymIdx = SymIdx+1;
438      while (Symbols.size() > NextSymIdx) {
439        SymbolRef::Type NextSymType;
440        Symbols[NextSymIdx].getType(NextSymType);
441        if (NextSymType == SymbolRef::ST_Function) {
442          Sections[SectIdx].containsSymbol(Symbols[NextSymIdx],
443                                           containsNextSym);
444          Symbols[NextSymIdx].getAddress(NextSym);
445          NextSym -= SectionAddress;
446          break;
447        }
448        ++NextSymIdx;
449      }
450
451      uint64_t SectSize;
452      Sections[SectIdx].getSize(SectSize);
453      uint64_t End = containsNextSym ?  NextSym : SectSize;
454      uint64_t Size;
455
456      symbolTableWorked = true;
457
458      if (!CFG) {
459        // Normal disassembly, print addresses, bytes and mnemonic form.
460        StringRef SymName;
461        Symbols[SymIdx].getName(SymName);
462
463        outs() << SymName << ":\n";
464        DILineInfo lastLine;
465        for (uint64_t Index = Start; Index < End; Index += Size) {
466          MCInst Inst;
467
468          if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
469                                     DebugOut, nulls())) {
470            uint64_t SectAddress = 0;
471            Sections[SectIdx].getAddress(SectAddress);
472            outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
473
474            DumpBytes(StringRef(Bytes.data() + Index, Size));
475            IP->printInst(&Inst, outs(), "");
476
477            // Print debug info.
478            if (diContext) {
479              DILineInfo dli =
480                diContext->getLineInfoForAddress(SectAddress + Index);
481              // Print valid line info if it changed.
482              if (dli != lastLine && dli.getLine() != 0)
483                outs() << "\t## " << dli.getFileName() << ':'
484                       << dli.getLine() << ':' << dli.getColumn();
485              lastLine = dli;
486            }
487            outs() << "\n";
488          } else {
489            errs() << "llvm-objdump: warning: invalid instruction encoding\n";
490            if (Size == 0)
491              Size = 1; // skip illegible bytes
492          }
493        }
494      } else {
495        // Create CFG and use it for disassembly.
496        StringRef SymName;
497        Symbols[SymIdx].getName(SymName);
498        createMCFunctionAndSaveCalls(
499            SymName, DisAsm.get(), memoryObject, Start, End,
500            InstrAnalysis.get(), Start, DebugOut, FunctionMap, Functions);
501      }
502    }
503    if (!CFG && !symbolTableWorked) {
504      // Reading the symbol table didn't work, disassemble the whole section.
505      uint64_t SectAddress;
506      Sections[SectIdx].getAddress(SectAddress);
507      uint64_t SectSize;
508      Sections[SectIdx].getSize(SectSize);
509      uint64_t InstSize;
510      for (uint64_t Index = 0; Index < SectSize; Index += InstSize) {
511	MCInst Inst;
512
513	if (DisAsm->getInstruction(Inst, InstSize, memoryObject, Index,
514				   DebugOut, nulls())) {
515	  outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
516
517	  DumpBytes(StringRef(Bytes.data() + Index, InstSize));
518	  IP->printInst(&Inst, outs(), "");
519
520	  outs() << "\n";
521	} else {
522	  errs() << "llvm-objdump: warning: invalid instruction encoding\n";
523	  if (InstSize == 0)
524	    InstSize = 1; // skip illegible bytes
525	}
526      }
527    }
528
529    if (CFG) {
530      if (!symbolTableWorked) {
531        // Reading the symbol table didn't work, create a big __TEXT symbol.
532        uint64_t SectSize = 0, SectAddress = 0;
533        Sections[SectIdx].getSize(SectSize);
534        Sections[SectIdx].getAddress(SectAddress);
535        createMCFunctionAndSaveCalls("__TEXT", DisAsm.get(), memoryObject,
536                                     0, SectSize,
537                                     InstrAnalysis.get(),
538                                     SectAddress, DebugOut,
539                                     FunctionMap, Functions);
540      }
541      for (std::map<uint64_t, MCFunction*>::iterator mi = FunctionMap.begin(),
542           me = FunctionMap.end(); mi != me; ++mi)
543        if (mi->second == 0) {
544          // Create functions for the remaining callees we have gathered,
545          // but we didn't find a name for them.
546          uint64_t SectSize = 0;
547          Sections[SectIdx].getSize(SectSize);
548
549          SmallVector<uint64_t, 16> Calls;
550          MCFunction f =
551            MCFunction::createFunctionFromMC("unknown", DisAsm.get(),
552                                             memoryObject, mi->first,
553                                             SectSize,
554                                             InstrAnalysis.get(), DebugOut,
555                                             Calls);
556          Functions.push_back(f);
557          mi->second = &Functions.back();
558          for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
559            std::pair<uint64_t, MCFunction*> p(Calls[i], (MCFunction*)0);
560            if (FunctionMap.insert(p).second)
561              mi = FunctionMap.begin();
562          }
563        }
564
565      DenseSet<uint64_t> PrintedBlocks;
566      for (unsigned ffi = 0, ffe = Functions.size(); ffi != ffe; ++ffi) {
567        MCFunction &f = Functions[ffi];
568        for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
569          if (!PrintedBlocks.insert(fi->first).second)
570            continue; // We already printed this block.
571
572          // We assume a block has predecessors when it's the first block after
573          // a symbol.
574          bool hasPreds = FunctionMap.find(fi->first) != FunctionMap.end();
575
576          // See if this block has predecessors.
577          // FIXME: Slow.
578          for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
579              ++pi)
580            if (pi->second.contains(fi->first)) {
581              hasPreds = true;
582              break;
583            }
584
585          uint64_t SectSize = 0, SectAddress;
586          Sections[SectIdx].getSize(SectSize);
587          Sections[SectIdx].getAddress(SectAddress);
588
589          // No predecessors, this is a data block. Print as .byte directives.
590          if (!hasPreds) {
591            uint64_t End = llvm::next(fi) == fe ? SectSize :
592                                                  llvm::next(fi)->first;
593            outs() << "# " << End-fi->first << " bytes of data:\n";
594            for (unsigned pos = fi->first; pos != End; ++pos) {
595              outs() << format("%8x:\t", SectAddress + pos);
596              DumpBytes(StringRef(Bytes.data() + pos, 1));
597              outs() << format("\t.byte 0x%02x\n", (uint8_t)Bytes[pos]);
598            }
599            continue;
600          }
601
602          if (fi->second.contains(fi->first)) // Print a header for simple loops
603            outs() << "# Loop begin:\n";
604
605          DILineInfo lastLine;
606          // Walk over the instructions and print them.
607          for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
608               ++ii) {
609            const MCDecodedInst &Inst = fi->second.getInsts()[ii];
610
611            // If there's a symbol at this address, print its name.
612            if (FunctionMap.find(SectAddress + Inst.Address) !=
613                FunctionMap.end())
614              outs() << FunctionMap[SectAddress + Inst.Address]-> getName()
615                     << ":\n";
616
617            outs() << format("%8" PRIx64 ":\t", SectAddress + Inst.Address);
618            DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
619
620            if (fi->second.contains(fi->first)) // Indent simple loops.
621              outs() << '\t';
622
623            IP->printInst(&Inst.Inst, outs(), "");
624
625            // Look for relocations inside this instructions, if there is one
626            // print its target and additional information if available.
627            for (unsigned j = 0; j != Relocs.size(); ++j)
628              if (Relocs[j].first >= SectAddress + Inst.Address &&
629                  Relocs[j].first < SectAddress + Inst.Address + Inst.Size) {
630                StringRef SymName;
631                uint64_t Addr;
632                Relocs[j].second.getAddress(Addr);
633                Relocs[j].second.getName(SymName);
634
635                outs() << "\t# " << SymName << ' ';
636                DumpAddress(Addr, Sections, MachOObj, outs());
637              }
638
639            // If this instructions contains an address, see if we can evaluate
640            // it and print additional information.
641            uint64_t targ = InstrAnalysis->evaluateBranch(Inst.Inst,
642                                                          Inst.Address,
643                                                          Inst.Size);
644            if (targ != -1ULL)
645              DumpAddress(targ, Sections, MachOObj, outs());
646
647            // Print debug info.
648            if (diContext) {
649              DILineInfo dli =
650                diContext->getLineInfoForAddress(SectAddress + Inst.Address);
651              // Print valid line info if it changed.
652              if (dli != lastLine && dli.getLine() != 0)
653                outs() << "\t## " << dli.getFileName() << ':'
654                       << dli.getLine() << ':' << dli.getColumn();
655              lastLine = dli;
656            }
657
658            outs() << '\n';
659          }
660        }
661
662        emitDOTFile((f.getName().str() + ".dot").c_str(), f, IP.get());
663      }
664    }
665  }
666}
667