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