Do the same fix as r149667, but for the Mach-O disassembler.
[oota-llvm.git] / 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/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/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>
41 using namespace llvm;
42 using namespace object;
43
44 static 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
48 static cl::opt<bool>
49   UseDbg("g", cl::desc("Print line information from debug info if available"));
50
51 static cl::opt<std::string>
52   DSYMFile("dsym", cl::desc("Use .dSYM file for debug info"));
53
54 static 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
88 struct SymbolSorter {
89   bool operator()(const SymbolRef &A, const SymbolRef &B) {
90     SymbolRef::Type AType, BType;
91     A.getType(AType);
92     B.getType(BType);
93
94     uint64_t AAddr, BAddr;
95     if (AType != SymbolRef::ST_Function)
96       AAddr = 0;
97     else
98       A.getAddress(AAddr);
99     if (BType != SymbolRef::ST_Function)
100       BAddr = 0;
101     else
102       B.getAddress(BAddr);
103     return AAddr < BAddr;
104   }
105 };
106
107 // Print additional information about an address, if available.
108 static void DumpAddress(uint64_t Address, ArrayRef<SectionRef> Sections,
109                         MachOObject *MachOObj, raw_ostream &OS) {
110   for (unsigned i = 0; i != Sections.size(); ++i) {
111     uint64_t SectAddr = 0, SectSize = 0;
112     Sections[i].getAddress(SectAddr);
113     Sections[i].getSize(SectSize);
114     uint64_t addr = SectAddr;
115     if (SectAddr <= Address &&
116         SectAddr + SectSize > Address) {
117       StringRef bytes, name;
118       Sections[i].getContents(bytes);
119       Sections[i].getName(name);
120       // Print constant strings.
121       if (!name.compare("__cstring"))
122         OS << '"' << bytes.substr(addr, bytes.find('\0', addr)) << '"';
123       // Print constant CFStrings.
124       if (!name.compare("__cfstring"))
125         OS << "@\"" << bytes.substr(addr, bytes.find('\0', addr)) << '"';
126     }
127   }
128 }
129
130 typedef std::map<uint64_t, MCFunction*> FunctionMapTy;
131 typedef SmallVector<MCFunction, 16> FunctionListTy;
132 static void createMCFunctionAndSaveCalls(StringRef Name,
133                                          const MCDisassembler *DisAsm,
134                                          MemoryObject &Object, uint64_t Start,
135                                          uint64_t End,
136                                          MCInstrAnalysis *InstrAnalysis,
137                                          uint64_t Address,
138                                          raw_ostream &DebugOut,
139                                          FunctionMapTy &FunctionMap,
140                                          FunctionListTy &Functions) {
141   SmallVector<uint64_t, 16> Calls;
142   MCFunction f =
143     MCFunction::createFunctionFromMC(Name, DisAsm, Object, Start, End,
144                                      InstrAnalysis, DebugOut, Calls);
145   Functions.push_back(f);
146   FunctionMap[Address] = &Functions.back();
147
148   // Add the gathered callees to the map.
149   for (unsigned i = 0, e = Calls.size(); i != e; ++i)
150     FunctionMap.insert(std::make_pair(Calls[i], (MCFunction*)0));
151 }
152
153 // Write a graphviz file for the CFG inside an MCFunction.
154 static void emitDOTFile(const char *FileName, const MCFunction &f,
155                         MCInstPrinter *IP) {
156   // Start a new dot file.
157   std::string Error;
158   raw_fd_ostream Out(FileName, Error);
159   if (!Error.empty()) {
160     errs() << "llvm-objdump: warning: " << Error << '\n';
161     return;
162   }
163
164   Out << "digraph " << f.getName() << " {\n";
165   Out << "graph [ rankdir = \"LR\" ];\n";
166   for (MCFunction::iterator i = f.begin(), e = f.end(); i != e; ++i) {
167     bool hasPreds = false;
168     // Only print blocks that have predecessors.
169     // FIXME: Slow.
170     for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
171         ++pi)
172       if (pi->second.contains(i->first)) {
173         hasPreds = true;
174         break;
175       }
176
177     if (!hasPreds && i != f.begin())
178       continue;
179
180     Out << '"' << i->first << "\" [ label=\"<a>";
181     // Print instructions.
182     for (unsigned ii = 0, ie = i->second.getInsts().size(); ii != ie;
183         ++ii) {
184       // Escape special chars and print the instruction in mnemonic form.
185       std::string Str;
186       raw_string_ostream OS(Str);
187       IP->printInst(&i->second.getInsts()[ii].Inst, OS, "");
188       Out << DOT::EscapeString(OS.str()) << '|';
189     }
190     Out << "<o>\" shape=\"record\" ];\n";
191
192     // Add edges.
193     for (MCBasicBlock::succ_iterator si = i->second.succ_begin(),
194         se = i->second.succ_end(); si != se; ++si)
195       Out << i->first << ":o -> " << *si <<":a\n";
196   }
197   Out << "}\n";
198 }
199
200 static void getSectionsAndSymbols(const macho::Header &Header,
201                                   MachOObjectFile *MachOObj,
202                              InMemoryStruct<macho::SymtabLoadCommand> *SymtabLC,
203                                   std::vector<SectionRef> &Sections,
204                                   std::vector<SymbolRef> &Symbols,
205                                   SmallVectorImpl<uint64_t> &FoundFns) {
206   error_code ec;
207   for (symbol_iterator SI = MachOObj->begin_symbols(),
208        SE = MachOObj->end_symbols(); SI != SE; SI.increment(ec))
209     Symbols.push_back(*SI);
210
211   for (section_iterator SI = MachOObj->begin_sections(),
212        SE = MachOObj->end_sections(); SI != SE; SI.increment(ec)) {
213     SectionRef SR = *SI;
214     StringRef SectName;
215     SR.getName(SectName);
216     Sections.push_back(*SI);
217   }
218
219   for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
220     const MachOObject::LoadCommandInfo &LCI =
221        MachOObj->getObject()->getLoadCommandInfo(i);
222     if (LCI.Command.Type == macho::LCT_FunctionStarts) {
223       // We found a function starts segment, parse the addresses for later
224       // consumption.
225       InMemoryStruct<macho::LinkeditDataLoadCommand> LLC;
226       MachOObj->getObject()->ReadLinkeditDataLoadCommand(LCI, LLC);
227
228       MachOObj->getObject()->ReadULEB128s(LLC->DataOffset, FoundFns);
229     }
230   }
231 }
232
233 void llvm::DisassembleInputMachO(StringRef Filename) {
234   OwningPtr<MemoryBuffer> Buff;
235
236   if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
237     errs() << "llvm-objdump: " << Filename << ": " << ec.message() << "\n";
238     return;
239   }
240
241   OwningPtr<MachOObjectFile> MachOOF(static_cast<MachOObjectFile*>(
242         ObjectFile::createMachOObjectFile(Buff.take())));
243   MachOObject *MachOObj = MachOOF->getObject();
244
245   const Target *TheTarget = GetTarget(MachOObj);
246   if (!TheTarget) {
247     // GetTarget prints out stuff.
248     return;
249   }
250   OwningPtr<const MCInstrInfo> InstrInfo(TheTarget->createMCInstrInfo());
251   OwningPtr<MCInstrAnalysis>
252     InstrAnalysis(TheTarget->createMCInstrAnalysis(InstrInfo.get()));
253
254   // Set up disassembler.
255   OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
256   OwningPtr<const MCSubtargetInfo>
257     STI(TheTarget->createMCSubtargetInfo(TripleName, "", ""));
258   OwningPtr<const MCDisassembler> DisAsm(TheTarget->createMCDisassembler(*STI));
259   int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
260   OwningPtr<MCInstPrinter> IP(TheTarget->createMCInstPrinter(
261                               AsmPrinterVariant, *AsmInfo, *STI));
262
263   if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) {
264     errs() << "error: couldn't initialize disassembler for target "
265            << TripleName << '\n';
266     return;
267   }
268
269   outs() << '\n' << Filename << ":\n\n";
270
271   const macho::Header &Header = MachOObj->getHeader();
272
273   const MachOObject::LoadCommandInfo *SymtabLCI = 0;
274   // First, find the symbol table segment.
275   for (unsigned i = 0; i != Header.NumLoadCommands; ++i) {
276     const MachOObject::LoadCommandInfo &LCI = MachOObj->getLoadCommandInfo(i);
277     if (LCI.Command.Type == macho::LCT_Symtab) {
278       SymtabLCI = &LCI;
279       break;
280     }
281   }
282
283   // Read and register the symbol table data.
284   InMemoryStruct<macho::SymtabLoadCommand> SymtabLC;
285   MachOObj->ReadSymtabLoadCommand(*SymtabLCI, SymtabLC);
286   MachOObj->RegisterStringTable(*SymtabLC);
287
288   std::vector<SectionRef> Sections;
289   std::vector<SymbolRef> Symbols;
290   SmallVector<uint64_t, 8> FoundFns;
291
292   getSectionsAndSymbols(Header, MachOOF.get(), &SymtabLC, Sections, Symbols,
293                         FoundFns);
294
295   // Make a copy of the unsorted symbol list. FIXME: duplication
296   std::vector<SymbolRef> UnsortedSymbols(Symbols);
297   // Sort the symbols by address, just in case they didn't come in that way.
298   std::sort(Symbols.begin(), Symbols.end(), SymbolSorter());
299
300 #ifndef NDEBUG
301   raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
302 #else
303   raw_ostream &DebugOut = nulls();
304 #endif
305
306   StringRef DebugAbbrevSection, DebugInfoSection, DebugArangesSection,
307             DebugLineSection, DebugStrSection;
308   OwningPtr<DIContext> diContext;
309   OwningPtr<MachOObjectFile> DSYMObj;
310   MachOObject *DbgInfoObj = MachOObj;
311   // Try to find debug info and set up the DIContext for it.
312   if (UseDbg) {
313     ArrayRef<SectionRef> DebugSections = Sections;
314     std::vector<SectionRef> DSYMSections;
315
316     // A separate DSym file path was specified, parse it as a macho file,
317     // get the sections and supply it to the section name parsing machinery.
318     if (!DSYMFile.empty()) {
319       OwningPtr<MemoryBuffer> Buf;
320       if (error_code ec = MemoryBuffer::getFileOrSTDIN(DSYMFile.c_str(), Buf)) {
321         errs() << "llvm-objdump: " << Filename << ": " << ec.message() << '\n';
322         return;
323       }
324       DSYMObj.reset(static_cast<MachOObjectFile*>(
325             ObjectFile::createMachOObjectFile(Buf.take())));
326       const macho::Header &Header = DSYMObj->getObject()->getHeader();
327
328       std::vector<SymbolRef> Symbols;
329       SmallVector<uint64_t, 8> FoundFns;
330       getSectionsAndSymbols(Header, DSYMObj.get(), 0, DSYMSections, Symbols,
331                             FoundFns);
332       DebugSections = DSYMSections;
333       DbgInfoObj = DSYMObj.get()->getObject();
334     }
335
336     // Find the named debug info sections.
337     for (unsigned SectIdx = 0; SectIdx != DebugSections.size(); SectIdx++) {
338       StringRef SectName;
339       if (!DebugSections[SectIdx].getName(SectName)) {
340         if (SectName.equals("__DWARF,__debug_abbrev"))
341           DebugSections[SectIdx].getContents(DebugAbbrevSection);
342         else if (SectName.equals("__DWARF,__debug_info"))
343           DebugSections[SectIdx].getContents(DebugInfoSection);
344         else if (SectName.equals("__DWARF,__debug_aranges"))
345           DebugSections[SectIdx].getContents(DebugArangesSection);
346         else if (SectName.equals("__DWARF,__debug_line"))
347           DebugSections[SectIdx].getContents(DebugLineSection);
348         else if (SectName.equals("__DWARF,__debug_str"))
349           DebugSections[SectIdx].getContents(DebugStrSection);
350       }
351     }
352
353     // Setup the DIContext.
354     diContext.reset(DIContext::getDWARFContext(DbgInfoObj->isLittleEndian(),
355                                                DebugInfoSection,
356                                                DebugAbbrevSection,
357                                                DebugArangesSection,
358                                                DebugLineSection,
359                                                DebugStrSection));
360   }
361
362   FunctionMapTy FunctionMap;
363   FunctionListTy Functions;
364
365   for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) {
366     StringRef SectName;
367     if (Sections[SectIdx].getName(SectName) ||
368         SectName.compare("__TEXT,__text"))
369       continue; // Skip non-text sections
370
371     // Insert the functions from the function starts segment into our map.
372     uint64_t VMAddr;
373     Sections[SectIdx].getAddress(VMAddr);
374     for (unsigned i = 0, e = FoundFns.size(); i != e; ++i) {
375       StringRef SectBegin;
376       Sections[SectIdx].getContents(SectBegin);
377       uint64_t Offset = (uint64_t)SectBegin.data();
378       FunctionMap.insert(std::make_pair(VMAddr + FoundFns[i]-Offset,
379                                         (MCFunction*)0));
380     }
381
382     StringRef Bytes;
383     Sections[SectIdx].getContents(Bytes);
384     StringRefMemoryObject memoryObject(Bytes);
385     bool symbolTableWorked = false;
386
387     // Parse relocations.
388     std::vector<std::pair<uint64_t, SymbolRef> > Relocs;
389     error_code ec;
390     for (relocation_iterator RI = Sections[SectIdx].begin_relocations(),
391          RE = Sections[SectIdx].end_relocations(); RI != RE; RI.increment(ec)) {
392       uint64_t RelocOffset, SectionAddress;
393       RI->getAddress(RelocOffset);
394       Sections[SectIdx].getAddress(SectionAddress);
395       RelocOffset -= SectionAddress;
396
397       SymbolRef RelocSym;
398       RI->getSymbol(RelocSym);
399
400       Relocs.push_back(std::make_pair(RelocOffset, RelocSym));
401     }
402     array_pod_sort(Relocs.begin(), Relocs.end());
403
404     // Disassemble symbol by symbol.
405     for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
406       StringRef SymName;
407       Symbols[SymIdx].getName(SymName);
408
409       SymbolRef::Type ST;
410       Symbols[SymIdx].getType(ST);
411       if (ST != SymbolRef::ST_Function)
412         continue;
413
414       // Make sure the symbol is defined in this section.
415       bool containsSym = false;
416       Sections[SectIdx].containsSymbol(Symbols[SymIdx], containsSym);
417       if (!containsSym)
418         continue;
419
420       // Start at the address of the symbol relative to the section's address.
421       uint64_t SectionAddress = 0;
422       uint64_t Start = 0;
423       Sections[SectIdx].getAddress(SectionAddress);
424       Symbols[SymIdx].getAddress(Start);
425       Start -= SectionAddress;
426
427       // Stop disassembling either at the beginning of the next symbol or at
428       // the end of the section.
429       bool containsNextSym = true;
430       uint64_t NextSym = 0;
431       uint64_t NextSymIdx = SymIdx+1;
432       while (Symbols.size() > NextSymIdx) {
433         SymbolRef::Type NextSymType;
434         Symbols[NextSymIdx].getType(NextSymType);
435         if (NextSymType == SymbolRef::ST_Function) {
436           Sections[SectIdx].containsSymbol(Symbols[NextSymIdx],
437                                            containsNextSym);
438           Symbols[NextSymIdx].getAddress(NextSym);
439           NextSym -= SectionAddress;
440           break;
441         }
442         ++NextSymIdx;
443       }
444
445       uint64_t SectSize;
446       Sections[SectIdx].getSize(SectSize);
447       uint64_t End = containsNextSym ?  NextSym : SectSize;
448       uint64_t Size;
449
450       symbolTableWorked = true;
451
452       if (!CFG) {
453         // Normal disassembly, print addresses, bytes and mnemonic form.
454         StringRef SymName;
455         Symbols[SymIdx].getName(SymName);
456
457         outs() << SymName << ":\n";
458         DILineInfo lastLine;
459         for (uint64_t Index = Start; Index < End; Index += Size) {
460           MCInst Inst;
461
462           if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
463                                      DebugOut, nulls())) {
464             uint64_t SectAddress = 0;
465             Sections[SectIdx].getAddress(SectAddress);
466             outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
467
468             DumpBytes(StringRef(Bytes.data() + Index, Size));
469             IP->printInst(&Inst, outs(), "");
470
471             // Print debug info.
472             if (diContext) {
473               DILineInfo dli =
474                 diContext->getLineInfoForAddress(SectAddress + Index);
475               // Print valid line info if it changed.
476               if (dli != lastLine && dli.getLine() != 0)
477                 outs() << "\t## " << dli.getFileName() << ':'
478                        << dli.getLine() << ':' << dli.getColumn();
479               lastLine = dli;
480             }
481             outs() << "\n";
482           } else {
483             errs() << "llvm-objdump: warning: invalid instruction encoding\n";
484             if (Size == 0)
485               Size = 1; // skip illegible bytes
486           }
487         }
488       } else {
489         // Create CFG and use it for disassembly.
490         StringRef SymName;
491         Symbols[SymIdx].getName(SymName);
492         createMCFunctionAndSaveCalls(
493             SymName, DisAsm.get(), memoryObject, Start, End,
494             InstrAnalysis.get(), Start, DebugOut, FunctionMap, Functions);
495       }
496     }
497
498     if (CFG) {
499       if (!symbolTableWorked) {
500         // Reading the symbol table didn't work, create a big __TEXT symbol.
501         uint64_t SectSize = 0, SectAddress = 0;
502         Sections[SectIdx].getSize(SectSize);
503         Sections[SectIdx].getAddress(SectAddress);
504         createMCFunctionAndSaveCalls("__TEXT", DisAsm.get(), memoryObject,
505                                      0, SectSize,
506                                      InstrAnalysis.get(),
507                                      SectAddress, DebugOut,
508                                      FunctionMap, Functions);
509       }
510       for (std::map<uint64_t, MCFunction*>::iterator mi = FunctionMap.begin(),
511            me = FunctionMap.end(); mi != me; ++mi)
512         if (mi->second == 0) {
513           // Create functions for the remaining callees we have gathered,
514           // but we didn't find a name for them.
515           uint64_t SectSize = 0;
516           Sections[SectIdx].getSize(SectSize);
517
518           SmallVector<uint64_t, 16> Calls;
519           MCFunction f =
520             MCFunction::createFunctionFromMC("unknown", DisAsm.get(),
521                                              memoryObject, mi->first,
522                                              SectSize,
523                                              InstrAnalysis.get(), DebugOut,
524                                              Calls);
525           Functions.push_back(f);
526           mi->second = &Functions.back();
527           for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
528             std::pair<uint64_t, MCFunction*> p(Calls[i], (MCFunction*)0);
529             if (FunctionMap.insert(p).second)
530               mi = FunctionMap.begin();
531           }
532         }
533
534       DenseSet<uint64_t> PrintedBlocks;
535       for (unsigned ffi = 0, ffe = Functions.size(); ffi != ffe; ++ffi) {
536         MCFunction &f = Functions[ffi];
537         for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
538           if (!PrintedBlocks.insert(fi->first).second)
539             continue; // We already printed this block.
540
541           // We assume a block has predecessors when it's the first block after
542           // a symbol.
543           bool hasPreds = FunctionMap.find(fi->first) != FunctionMap.end();
544
545           // See if this block has predecessors.
546           // FIXME: Slow.
547           for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
548               ++pi)
549             if (pi->second.contains(fi->first)) {
550               hasPreds = true;
551               break;
552             }
553
554           uint64_t SectSize = 0, SectAddress;
555           Sections[SectIdx].getSize(SectSize);
556           Sections[SectIdx].getAddress(SectAddress);
557
558           // No predecessors, this is a data block. Print as .byte directives.
559           if (!hasPreds) {
560             uint64_t End = llvm::next(fi) == fe ? SectSize :
561                                                   llvm::next(fi)->first;
562             outs() << "# " << End-fi->first << " bytes of data:\n";
563             for (unsigned pos = fi->first; pos != End; ++pos) {
564               outs() << format("%8x:\t", SectAddress + pos);
565               DumpBytes(StringRef(Bytes.data() + pos, 1));
566               outs() << format("\t.byte 0x%02x\n", (uint8_t)Bytes[pos]);
567             }
568             continue;
569           }
570
571           if (fi->second.contains(fi->first)) // Print a header for simple loops
572             outs() << "# Loop begin:\n";
573
574           DILineInfo lastLine;
575           // Walk over the instructions and print them.
576           for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
577                ++ii) {
578             const MCDecodedInst &Inst = fi->second.getInsts()[ii];
579
580             // If there's a symbol at this address, print its name.
581             if (FunctionMap.find(SectAddress + Inst.Address) !=
582                 FunctionMap.end())
583               outs() << FunctionMap[SectAddress + Inst.Address]-> getName()
584                      << ":\n";
585
586             outs() << format("%8" PRIx64 ":\t", SectAddress + Inst.Address);
587             DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
588
589             if (fi->second.contains(fi->first)) // Indent simple loops.
590               outs() << '\t';
591
592             IP->printInst(&Inst.Inst, outs(), "");
593
594             // Look for relocations inside this instructions, if there is one
595             // print its target and additional information if available.
596             for (unsigned j = 0; j != Relocs.size(); ++j)
597               if (Relocs[j].first >= SectAddress + Inst.Address &&
598                   Relocs[j].first < SectAddress + Inst.Address + Inst.Size) {
599                 StringRef SymName;
600                 uint64_t Addr;
601                 Relocs[j].second.getAddress(Addr);
602                 Relocs[j].second.getName(SymName);
603
604                 outs() << "\t# " << SymName << ' ';
605                 DumpAddress(Addr, Sections, MachOObj, outs());
606               }
607
608             // If this instructions contains an address, see if we can evaluate
609             // it and print additional information.
610             uint64_t targ = InstrAnalysis->evaluateBranch(Inst.Inst,
611                                                           Inst.Address,
612                                                           Inst.Size);
613             if (targ != -1ULL)
614               DumpAddress(targ, Sections, MachOObj, outs());
615
616             // Print debug info.
617             if (diContext) {
618               DILineInfo dli =
619                 diContext->getLineInfoForAddress(SectAddress + Inst.Address);
620               // Print valid line info if it changed.
621               if (dli != lastLine && dli.getLine() != 0)
622                 outs() << "\t## " << dli.getFileName() << ':'
623                        << dli.getLine() << ':' << dli.getColumn();
624               lastLine = dli;
625             }
626
627             outs() << '\n';
628           }
629         }
630
631         emitDOTFile((f.getName().str() + ".dot").c_str(), f, IP.get());
632       }
633     }
634   }
635 }