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>
42 using namespace llvm;
43 using namespace object;
44
45 static 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
49 static cl::opt<bool>
50 UseDbg("g", cl::desc("Print line information from debug info if available"));
51
52 static cl::opt<std::string>
53 DSYMFile("dsym", cl::desc("Use .dSYM file for debug info"));
54
GetTarget(const MachOObject * MachOObj)55 static 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
90 struct SymbolSorter {
operator ()SymbolSorter91 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.
DumpAddress(uint64_t Address,ArrayRef<SectionRef> Sections,MachOObject * MachOObj,raw_ostream & OS)110 static 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
132 typedef std::map<uint64_t, MCFunction*> FunctionMapTy;
133 typedef SmallVector<MCFunction, 16> FunctionListTy;
createMCFunctionAndSaveCalls(StringRef Name,const MCDisassembler * DisAsm,MemoryObject & Object,uint64_t Start,uint64_t End,MCInstrAnalysis * InstrAnalysis,uint64_t Address,raw_ostream & DebugOut,FunctionMapTy & FunctionMap,FunctionListTy & Functions)134 static 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.
emitDOTFile(const char * FileName,const MCFunction & f,MCInstPrinter * IP)156 static 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
getSectionsAndSymbols(const macho::Header & Header,MachOObjectFile * MachOObj,InMemoryStruct<macho::SymtabLoadCommand> * SymtabLC,std::vector<SectionRef> & Sections,std::vector<SymbolRef> & Symbols,SmallVectorImpl<uint64_t> & FoundFns)202 static 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
DisassembleInputMachO(StringRef Filename)235 void 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 DumpBytes(StringRef(Bytes.data() + Index, InstSize));
517 IP->printInst(&Inst, outs(), "");
518 outs() << "\n";
519 } else {
520 errs() << "llvm-objdump: warning: invalid instruction encoding\n";
521 if (InstSize == 0)
522 InstSize = 1; // skip illegible bytes
523 }
524 }
525 }
526
527 if (CFG) {
528 if (!symbolTableWorked) {
529 // Reading the symbol table didn't work, create a big __TEXT symbol.
530 uint64_t SectSize = 0, SectAddress = 0;
531 Sections[SectIdx].getSize(SectSize);
532 Sections[SectIdx].getAddress(SectAddress);
533 createMCFunctionAndSaveCalls("__TEXT", DisAsm.get(), memoryObject,
534 0, SectSize,
535 InstrAnalysis.get(),
536 SectAddress, DebugOut,
537 FunctionMap, Functions);
538 }
539 for (std::map<uint64_t, MCFunction*>::iterator mi = FunctionMap.begin(),
540 me = FunctionMap.end(); mi != me; ++mi)
541 if (mi->second == 0) {
542 // Create functions for the remaining callees we have gathered,
543 // but we didn't find a name for them.
544 uint64_t SectSize = 0;
545 Sections[SectIdx].getSize(SectSize);
546
547 SmallVector<uint64_t, 16> Calls;
548 MCFunction f =
549 MCFunction::createFunctionFromMC("unknown", DisAsm.get(),
550 memoryObject, mi->first,
551 SectSize,
552 InstrAnalysis.get(), DebugOut,
553 Calls);
554 Functions.push_back(f);
555 mi->second = &Functions.back();
556 for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
557 std::pair<uint64_t, MCFunction*> p(Calls[i], (MCFunction*)0);
558 if (FunctionMap.insert(p).second)
559 mi = FunctionMap.begin();
560 }
561 }
562
563 DenseSet<uint64_t> PrintedBlocks;
564 for (unsigned ffi = 0, ffe = Functions.size(); ffi != ffe; ++ffi) {
565 MCFunction &f = Functions[ffi];
566 for (MCFunction::iterator fi = f.begin(), fe = f.end(); fi != fe; ++fi){
567 if (!PrintedBlocks.insert(fi->first).second)
568 continue; // We already printed this block.
569
570 // We assume a block has predecessors when it's the first block after
571 // a symbol.
572 bool hasPreds = FunctionMap.find(fi->first) != FunctionMap.end();
573
574 // See if this block has predecessors.
575 // FIXME: Slow.
576 for (MCFunction::iterator pi = f.begin(), pe = f.end(); pi != pe;
577 ++pi)
578 if (pi->second.contains(fi->first)) {
579 hasPreds = true;
580 break;
581 }
582
583 uint64_t SectSize = 0, SectAddress;
584 Sections[SectIdx].getSize(SectSize);
585 Sections[SectIdx].getAddress(SectAddress);
586
587 // No predecessors, this is a data block. Print as .byte directives.
588 if (!hasPreds) {
589 uint64_t End = llvm::next(fi) == fe ? SectSize :
590 llvm::next(fi)->first;
591 outs() << "# " << End-fi->first << " bytes of data:\n";
592 for (unsigned pos = fi->first; pos != End; ++pos) {
593 outs() << format("%8x:\t", SectAddress + pos);
594 DumpBytes(StringRef(Bytes.data() + pos, 1));
595 outs() << format("\t.byte 0x%02x\n", (uint8_t)Bytes[pos]);
596 }
597 continue;
598 }
599
600 if (fi->second.contains(fi->first)) // Print a header for simple loops
601 outs() << "# Loop begin:\n";
602
603 DILineInfo lastLine;
604 // Walk over the instructions and print them.
605 for (unsigned ii = 0, ie = fi->second.getInsts().size(); ii != ie;
606 ++ii) {
607 const MCDecodedInst &Inst = fi->second.getInsts()[ii];
608
609 // If there's a symbol at this address, print its name.
610 if (FunctionMap.find(SectAddress + Inst.Address) !=
611 FunctionMap.end())
612 outs() << FunctionMap[SectAddress + Inst.Address]-> getName()
613 << ":\n";
614
615 outs() << format("%8" PRIx64 ":\t", SectAddress + Inst.Address);
616 DumpBytes(StringRef(Bytes.data() + Inst.Address, Inst.Size));
617
618 if (fi->second.contains(fi->first)) // Indent simple loops.
619 outs() << '\t';
620
621 IP->printInst(&Inst.Inst, outs(), "");
622
623 // Look for relocations inside this instructions, if there is one
624 // print its target and additional information if available.
625 for (unsigned j = 0; j != Relocs.size(); ++j)
626 if (Relocs[j].first >= SectAddress + Inst.Address &&
627 Relocs[j].first < SectAddress + Inst.Address + Inst.Size) {
628 StringRef SymName;
629 uint64_t Addr;
630 Relocs[j].second.getAddress(Addr);
631 Relocs[j].second.getName(SymName);
632
633 outs() << "\t# " << SymName << ' ';
634 DumpAddress(Addr, Sections, MachOObj, outs());
635 }
636
637 // If this instructions contains an address, see if we can evaluate
638 // it and print additional information.
639 uint64_t targ = InstrAnalysis->evaluateBranch(Inst.Inst,
640 Inst.Address,
641 Inst.Size);
642 if (targ != -1ULL)
643 DumpAddress(targ, Sections, MachOObj, outs());
644
645 // Print debug info.
646 if (diContext) {
647 DILineInfo dli =
648 diContext->getLineInfoForAddress(SectAddress + Inst.Address);
649 // Print valid line info if it changed.
650 if (dli != lastLine && dli.getLine() != 0)
651 outs() << "\t## " << dli.getFileName() << ':'
652 << dli.getLine() << ':' << dli.getColumn();
653 lastLine = dli;
654 }
655
656 outs() << '\n';
657 }
658 }
659
660 emitDOTFile((f.getName().str() + ".dot").c_str(), f, IP.get());
661 }
662 }
663 }
664 }
665