MachODump.cpp revision f6cfc15705140cc958b784a1bc98f7f0f09be6be 
1//===-- MachODump.cpp - Object file dumping utility for llvm --------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the MachO-specific dumper for llvm-objdump.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm-objdump.h"
15#include "MCFunction.h"
16#include "llvm/ADT/OwningPtr.h"
17#include "llvm/ADT/STLExtras.h"
18#include "llvm/ADT/Triple.h"
19#include "llvm/DebugInfo/DIContext.h"
20#include "llvm/MC/MCAsmInfo.h"
21#include "llvm/MC/MCDisassembler.h"
22#include "llvm/MC/MCInst.h"
23#include "llvm/MC/MCInstPrinter.h"
24#include "llvm/MC/MCInstrAnalysis.h"
25#include "llvm/MC/MCInstrDesc.h"
26#include "llvm/MC/MCInstrInfo.h"
27#include "llvm/MC/MCRegisterInfo.h"
28#include "llvm/MC/MCSubtargetInfo.h"
29#include "llvm/Object/MachO.h"
30#include "llvm/Support/CommandLine.h"
31#include "llvm/Support/Debug.h"
32#include "llvm/Support/Format.h"
33#include "llvm/Support/GraphWriter.h"
34#include "llvm/Support/MachO.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 MachOObjectFileBase *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                        const MachOObjectFileBase *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 MachOFormat::Header *Header,
203                                  MachOObjectFileBase *MachOObj,
204                                  std::vector<SectionRef> &Sections,
205                                  std::vector<SymbolRef> &Symbols,
206                                  SmallVectorImpl<uint64_t> &FoundFns) {
207  error_code ec;
208  for (symbol_iterator SI = MachOObj->begin_symbols(),
209       SE = MachOObj->end_symbols(); SI != SE; SI.increment(ec))
210    Symbols.push_back(*SI);
211
212  for (section_iterator SI = MachOObj->begin_sections(),
213       SE = MachOObj->end_sections(); SI != SE; SI.increment(ec)) {
214    SectionRef SR = *SI;
215    StringRef SectName;
216    SR.getName(SectName);
217    Sections.push_back(*SI);
218  }
219
220  for (unsigned i = 0; i != Header->NumLoadCommands; ++i) {
221    const MachOFormat::LoadCommand *Command = MachOObj->getLoadCommandInfo(i);
222    if (Command->Type == macho::LCT_FunctionStarts) {
223      // We found a function starts segment, parse the addresses for later
224      // consumption.
225      const MachOFormat::LinkeditDataLoadCommand *LLC =
226        reinterpret_cast<const MachOFormat::LinkeditDataLoadCommand*>(Command);
227
228      MachOObj->ReadULEB128s(LLC->DataOffset, FoundFns);
229    }
230  }
231}
232
233void 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<MachOObjectFileBase> MachOOF(static_cast<MachOObjectFileBase*>(
242        ObjectFile::createMachOObjectFile(Buff.take())));
243
244  const Target *TheTarget = GetTarget(MachOOF.get());
245  if (!TheTarget) {
246    // GetTarget prints out stuff.
247    return;
248  }
249  OwningPtr<const MCInstrInfo> InstrInfo(TheTarget->createMCInstrInfo());
250  OwningPtr<MCInstrAnalysis>
251    InstrAnalysis(TheTarget->createMCInstrAnalysis(InstrInfo.get()));
252
253  // Set up disassembler.
254  OwningPtr<const MCAsmInfo> AsmInfo(TheTarget->createMCAsmInfo(TripleName));
255  OwningPtr<const MCSubtargetInfo>
256    STI(TheTarget->createMCSubtargetInfo(TripleName, "", ""));
257  OwningPtr<const MCDisassembler> DisAsm(TheTarget->createMCDisassembler(*STI));
258  OwningPtr<const MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
259  int AsmPrinterVariant = AsmInfo->getAssemblerDialect();
260  OwningPtr<MCInstPrinter>
261    IP(TheTarget->createMCInstPrinter(AsmPrinterVariant, *AsmInfo, *InstrInfo,
262                                      *MRI, *STI));
263
264  if (!InstrAnalysis || !AsmInfo || !STI || !DisAsm || !IP) {
265    errs() << "error: couldn't initialize disassembler for target "
266           << TripleName << '\n';
267    return;
268  }
269
270  outs() << '\n' << Filename << ":\n\n";
271
272  const MachOFormat::Header *Header = MachOOF->getHeader();
273
274  std::vector<SectionRef> Sections;
275  std::vector<SymbolRef> Symbols;
276  SmallVector<uint64_t, 8> FoundFns;
277
278  getSectionsAndSymbols(Header, MachOOF.get(), Sections, Symbols, FoundFns);
279
280  // Make a copy of the unsorted symbol list. FIXME: duplication
281  std::vector<SymbolRef> UnsortedSymbols(Symbols);
282  // Sort the symbols by address, just in case they didn't come in that way.
283  std::sort(Symbols.begin(), Symbols.end(), SymbolSorter());
284
285#ifndef NDEBUG
286  raw_ostream &DebugOut = DebugFlag ? dbgs() : nulls();
287#else
288  raw_ostream &DebugOut = nulls();
289#endif
290
291  OwningPtr<DIContext> diContext;
292  ObjectFile *DbgObj = MachOOF.get();
293  // Try to find debug info and set up the DIContext for it.
294  if (UseDbg) {
295    // A separate DSym file path was specified, parse it as a macho file,
296    // get the sections and supply it to the section name parsing machinery.
297    if (!DSYMFile.empty()) {
298      OwningPtr<MemoryBuffer> Buf;
299      if (error_code ec = MemoryBuffer::getFileOrSTDIN(DSYMFile.c_str(), Buf)) {
300        errs() << "llvm-objdump: " << Filename << ": " << ec.message() << '\n';
301        return;
302      }
303      DbgObj = ObjectFile::createMachOObjectFile(Buf.take());
304    }
305
306    // Setup the DIContext
307    diContext.reset(DIContext::getDWARFContext(DbgObj));
308  }
309
310  FunctionMapTy FunctionMap;
311  FunctionListTy Functions;
312
313  for (unsigned SectIdx = 0; SectIdx != Sections.size(); SectIdx++) {
314    StringRef SectName;
315    if (Sections[SectIdx].getName(SectName) ||
316        SectName != "__text")
317      continue; // Skip non-text sections
318
319    DataRefImpl DR = Sections[SectIdx].getRawDataRefImpl();
320    StringRef SegmentName = MachOOF->getSectionFinalSegmentName(DR);
321    if (SegmentName != "__TEXT")
322      continue;
323
324    // Insert the functions from the function starts segment into our map.
325    uint64_t VMAddr;
326    Sections[SectIdx].getAddress(VMAddr);
327    for (unsigned i = 0, e = FoundFns.size(); i != e; ++i) {
328      StringRef SectBegin;
329      Sections[SectIdx].getContents(SectBegin);
330      uint64_t Offset = (uint64_t)SectBegin.data();
331      FunctionMap.insert(std::make_pair(VMAddr + FoundFns[i]-Offset,
332                                        (MCFunction*)0));
333    }
334
335    StringRef Bytes;
336    Sections[SectIdx].getContents(Bytes);
337    StringRefMemoryObject memoryObject(Bytes);
338    bool symbolTableWorked = false;
339
340    // Parse relocations.
341    std::vector<std::pair<uint64_t, SymbolRef> > Relocs;
342    error_code ec;
343    for (relocation_iterator RI = Sections[SectIdx].begin_relocations(),
344         RE = Sections[SectIdx].end_relocations(); RI != RE; RI.increment(ec)) {
345      uint64_t RelocOffset, SectionAddress;
346      RI->getAddress(RelocOffset);
347      Sections[SectIdx].getAddress(SectionAddress);
348      RelocOffset -= SectionAddress;
349
350      SymbolRef RelocSym;
351      RI->getSymbol(RelocSym);
352
353      Relocs.push_back(std::make_pair(RelocOffset, RelocSym));
354    }
355    array_pod_sort(Relocs.begin(), Relocs.end());
356
357    // Disassemble symbol by symbol.
358    for (unsigned SymIdx = 0; SymIdx != Symbols.size(); SymIdx++) {
359      StringRef SymName;
360      Symbols[SymIdx].getName(SymName);
361
362      SymbolRef::Type ST;
363      Symbols[SymIdx].getType(ST);
364      if (ST != SymbolRef::ST_Function)
365        continue;
366
367      // Make sure the symbol is defined in this section.
368      bool containsSym = false;
369      Sections[SectIdx].containsSymbol(Symbols[SymIdx], containsSym);
370      if (!containsSym)
371        continue;
372
373      // Start at the address of the symbol relative to the section's address.
374      uint64_t SectionAddress = 0;
375      uint64_t Start = 0;
376      Sections[SectIdx].getAddress(SectionAddress);
377      Symbols[SymIdx].getAddress(Start);
378      Start -= SectionAddress;
379
380      // Stop disassembling either at the beginning of the next symbol or at
381      // the end of the section.
382      bool containsNextSym = false;
383      uint64_t NextSym = 0;
384      uint64_t NextSymIdx = SymIdx+1;
385      while (Symbols.size() > NextSymIdx) {
386        SymbolRef::Type NextSymType;
387        Symbols[NextSymIdx].getType(NextSymType);
388        if (NextSymType == SymbolRef::ST_Function) {
389          Sections[SectIdx].containsSymbol(Symbols[NextSymIdx],
390                                           containsNextSym);
391          Symbols[NextSymIdx].getAddress(NextSym);
392          NextSym -= SectionAddress;
393          break;
394        }
395        ++NextSymIdx;
396      }
397
398      uint64_t SectSize;
399      Sections[SectIdx].getSize(SectSize);
400      uint64_t End = containsNextSym ?  NextSym : SectSize;
401      uint64_t Size;
402
403      symbolTableWorked = true;
404
405      if (!CFG) {
406        // Normal disassembly, print addresses, bytes and mnemonic form.
407        StringRef SymName;
408        Symbols[SymIdx].getName(SymName);
409
410        outs() << SymName << ":\n";
411        DILineInfo lastLine;
412        for (uint64_t Index = Start; Index < End; Index += Size) {
413          MCInst Inst;
414
415          if (DisAsm->getInstruction(Inst, Size, memoryObject, Index,
416                                     DebugOut, nulls())) {
417            uint64_t SectAddress = 0;
418            Sections[SectIdx].getAddress(SectAddress);
419            outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
420
421            DumpBytes(StringRef(Bytes.data() + Index, Size));
422            IP->printInst(&Inst, outs(), "");
423
424            // Print debug info.
425            if (diContext) {
426              DILineInfo dli =
427                diContext->getLineInfoForAddress(SectAddress + Index);
428              // Print valid line info if it changed.
429              if (dli != lastLine && dli.getLine() != 0)
430                outs() << "\t## " << dli.getFileName() << ':'
431                       << dli.getLine() << ':' << dli.getColumn();
432              lastLine = dli;
433            }
434            outs() << "\n";
435          } else {
436            errs() << "llvm-objdump: warning: invalid instruction encoding\n";
437            if (Size == 0)
438              Size = 1; // skip illegible bytes
439          }
440        }
441      } else {
442        // Create CFG and use it for disassembly.
443        StringRef SymName;
444        Symbols[SymIdx].getName(SymName);
445        createMCFunctionAndSaveCalls(
446            SymName, DisAsm.get(), memoryObject, Start, End,
447            InstrAnalysis.get(), Start, DebugOut, FunctionMap, Functions);
448      }
449    }
450    if (!CFG && !symbolTableWorked) {
451      // Reading the symbol table didn't work, disassemble the whole section.
452      uint64_t SectAddress;
453      Sections[SectIdx].getAddress(SectAddress);
454      uint64_t SectSize;
455      Sections[SectIdx].getSize(SectSize);
456      uint64_t InstSize;
457      for (uint64_t Index = 0; Index < SectSize; Index += InstSize) {
458        MCInst Inst;
459
460        if (DisAsm->getInstruction(Inst, InstSize, memoryObject, Index,
461                                   DebugOut, nulls())) {
462          outs() << format("%8" PRIx64 ":\t", SectAddress + Index);
463          DumpBytes(StringRef(Bytes.data() + Index, InstSize));
464          IP->printInst(&Inst, outs(), "");
465          outs() << "\n";
466        } else {
467          errs() << "llvm-objdump: warning: invalid instruction encoding\n";
468          if (InstSize == 0)
469            InstSize = 1; // skip illegible bytes
470        }
471      }
472    }
473
474    if (CFG) {
475      if (!symbolTableWorked) {
476        // Reading the symbol table didn't work, create a big __TEXT symbol.
477        uint64_t SectSize = 0, SectAddress = 0;
478        Sections[SectIdx].getSize(SectSize);
479        Sections[SectIdx].getAddress(SectAddress);
480        createMCFunctionAndSaveCalls("__TEXT", DisAsm.get(), memoryObject,
481                                     0, SectSize,
482                                     InstrAnalysis.get(),
483                                     SectAddress, DebugOut,
484                                     FunctionMap, Functions);
485      }
486      for (std::map<uint64_t, MCFunction*>::iterator mi = FunctionMap.begin(),
487           me = FunctionMap.end(); mi != me; ++mi)
488        if (mi->second == 0) {
489          // Create functions for the remaining callees we have gathered,
490          // but we didn't find a name for them.
491          uint64_t SectSize = 0;
492          Sections[SectIdx].getSize(SectSize);
493
494          SmallVector<uint64_t, 16> Calls;
495          MCFunction f =
496            MCFunction::createFunctionFromMC("unknown", DisAsm.get(),
497                                             memoryObject, mi->first,
498                                             SectSize,
499                                             InstrAnalysis.get(), DebugOut,
500                                             Calls);
501          Functions.push_back(f);
502          mi->second = &Functions.back();
503          for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
504            std::pair<uint64_t, MCFunction*> p(Calls[i], (MCFunction*)0);
505            if (FunctionMap.insert(p).second)
506              mi = FunctionMap.begin();
507          }
508        }
509
510      DenseSet<uint64_t> PrintedBlocks;
511      for (unsigned ffi = 0, ffe = Functions.size(); ffi != ffe; ++ffi) {
512        MCFunction &f = Functions[ffi];
513        for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
514          if (!PrintedBlocks.insert(fi->first).second)
515            continue; // We already printed this block.
516
517          // We assume a block has predecessors when it's the first block after
518          // a symbol.
519          bool hasPreds = FunctionMap.find(fi->first) != FunctionMap.end();
520
521          // See if this block has predecessors.
522          // FIXME: Slow.
523          for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
524              ++pi)
525            if (pi->second.contains(fi->first)) {
526              hasPreds = true;
527              break;
528            }
529
530          uint64_t SectSize = 0, SectAddress;
531          Sections[SectIdx].getSize(SectSize);
532          Sections[SectIdx].getAddress(SectAddress);
533
534          // No predecessors, this is a data block. Print as .byte directives.
535          if (!hasPreds) {
536            uint64_t End = llvm::next(fi) == fe ? SectSize :
537                                                  llvm::next(fi)->first;
538            outs() << "# " << End-fi->first << " bytes of data:\n";
539            for (unsigned pos = fi->first; pos != End; ++pos) {
540              outs() << format("%8x:\t", SectAddress + pos);
541              DumpBytes(StringRef(Bytes.data() + pos, 1));
542              outs() << format("\t.byte 0x%02x\n", (uint8_t)Bytes[pos]);
543            }
544            continue;
545          }
546
547          if (fi->second.contains(fi->first)) // Print a header for simple loops
548            outs() << "# Loop begin:\n";
549
550          DILineInfo lastLine;
551          // Walk over the instructions and print them.
552          for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
553               ++ii) {
554            const MCDecodedInst &Inst = fi->second.getInsts()[ii];
555
556            // If there's a symbol at this address, print its name.
557            if (FunctionMap.find(SectAddress + Inst.Address) !=
558                FunctionMap.end())
559              outs() << FunctionMap[SectAddress + Inst.Address]-> getName()
560                     << ":\n";
561
562            outs() << format("%8" PRIx64 ":\t", SectAddress + Inst.Address);
563            DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
564
565            if (fi->second.contains(fi->first)) // Indent simple loops.
566              outs() << '\t';
567
568            IP->printInst(&Inst.Inst, outs(), "");
569
570            // Look for relocations inside this instructions, if there is one
571            // print its target and additional information if available.
572            for (unsigned j = 0; j != Relocs.size(); ++j)
573              if (Relocs[j].first >= SectAddress + Inst.Address &&
574                  Relocs[j].first < SectAddress + Inst.Address + Inst.Size) {
575                StringRef SymName;
576                uint64_t Addr;
577                Relocs[j].second.getAddress(Addr);
578                Relocs[j].second.getName(SymName);
579
580                outs() << "\t# " << SymName << ' ';
581                DumpAddress(Addr, Sections, MachOOF.get(), outs());
582              }
583
584            // If this instructions contains an address, see if we can evaluate
585            // it and print additional information.
586            uint64_t targ = InstrAnalysis->evaluateBranch(Inst.Inst,
587                                                          Inst.Address,
588                                                          Inst.Size);
589            if (targ != -1ULL)
590              DumpAddress(targ, Sections, MachOOF.get(), outs());
591
592            // Print debug info.
593            if (diContext) {
594              DILineInfo dli =
595                diContext->getLineInfoForAddress(SectAddress + Inst.Address);
596              // Print valid line info if it changed.
597              if (dli != lastLine && dli.getLine() != 0)
598                outs() << "\t## " << dli.getFileName() << ':'
599                       << dli.getLine() << ':' << dli.getColumn();
600              lastLine = dli;
601            }
602
603            outs() << '\n';
604          }
605        }
606
607        emitDOTFile((f.getName().str() + ".dot").c_str(), f, IP.get());
608      }
609    }
610  }
611}
612