1//===-- llvm-dwarfdump.cpp - Debug info dumping utility for llvm ----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This program is a utility that works like "dwarfdump".
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm-dwarfdump.h"
14#include "llvm/ADT/MapVector.h"
15#include "llvm/ADT/STLExtras.h"
16#include "llvm/ADT/SmallSet.h"
17#include "llvm/ADT/StringSet.h"
18#include "llvm/DebugInfo/DIContext.h"
19#include "llvm/DebugInfo/DWARF/DWARFAcceleratorTable.h"
20#include "llvm/DebugInfo/DWARF/DWARFCompileUnit.h"
21#include "llvm/DebugInfo/DWARF/DWARFContext.h"
22#include "llvm/MC/MCRegisterInfo.h"
23#include "llvm/MC/TargetRegistry.h"
24#include "llvm/Object/Archive.h"
25#include "llvm/Object/MachOUniversal.h"
26#include "llvm/Object/ObjectFile.h"
27#include "llvm/Support/CommandLine.h"
28#include "llvm/Support/Debug.h"
29#include "llvm/Support/Format.h"
30#include "llvm/Support/FormatVariadic.h"
31#include "llvm/Support/InitLLVM.h"
32#include "llvm/Support/MemoryBuffer.h"
33#include "llvm/Support/Path.h"
34#include "llvm/Support/Regex.h"
35#include "llvm/Support/TargetSelect.h"
36#include "llvm/Support/ToolOutputFile.h"
37#include "llvm/Support/WithColor.h"
38#include "llvm/Support/raw_ostream.h"
39#include "llvm/TargetParser/Triple.h"
40#include <cstdlib>
41
42using namespace llvm;
43using namespace llvm::dwarfdump;
44using namespace llvm::object;
45
46namespace {
47/// Parser for options that take an optional offest argument.
48/// @{
49struct OffsetOption {
50 uint64_t Val = 0;
51 bool HasValue = false;
52 bool IsRequested = false;
53};
54struct BoolOption : public OffsetOption {};
55} // namespace
56
57namespace llvm {
58namespace cl {
59template <>
60class parser<OffsetOption> final : public basic_parser<OffsetOption> {
61public:
62 parser(Option &O) : basic_parser(O) {}
63
64 /// Return true on error.
65 bool parse(Option &O, StringRef ArgName, StringRef Arg, OffsetOption &Val) {
66 if (Arg == "") {
67 Val.Val = 0;
68 Val.HasValue = false;
69 Val.IsRequested = true;
70 return false;
71 }
72 if (Arg.getAsInteger(Radix: 0, Result&: Val.Val))
73 return O.error(Message: "'" + Arg + "' value invalid for integer argument");
74 Val.HasValue = true;
75 Val.IsRequested = true;
76 return false;
77 }
78
79 enum ValueExpected getValueExpectedFlagDefault() const {
80 return ValueOptional;
81 }
82
83 StringRef getValueName() const override { return StringRef("offset"); }
84
85 void printOptionDiff(const Option &O, OffsetOption V, OptVal Default,
86 size_t GlobalWidth) const {
87 printOptionName(O, GlobalWidth);
88 outs() << "[=offset]";
89 }
90};
91
92template <> class parser<BoolOption> final : public basic_parser<BoolOption> {
93public:
94 parser(Option &O) : basic_parser(O) {}
95
96 /// Return true on error.
97 bool parse(Option &O, StringRef ArgName, StringRef Arg, BoolOption &Val) {
98 if (Arg != "")
99 return O.error(Message: "this is a flag and does not take a value");
100 Val.Val = 0;
101 Val.HasValue = false;
102 Val.IsRequested = true;
103 return false;
104 }
105
106 enum ValueExpected getValueExpectedFlagDefault() const {
107 return ValueOptional;
108 }
109
110 StringRef getValueName() const override { return StringRef(); }
111
112 void printOptionDiff(const Option &O, OffsetOption V, OptVal Default,
113 size_t GlobalWidth) const {
114 printOptionName(O, GlobalWidth);
115 }
116};
117} // namespace cl
118} // namespace llvm
119
120/// @}
121/// Command line options.
122/// @{
123
124namespace {
125using namespace cl;
126
127enum ErrorDetailLevel {
128 OnlyDetailsNoSummary,
129 NoDetailsOnlySummary,
130 NoDetailsOrSummary,
131 BothDetailsAndSummary,
132 Unspecified
133};
134
135OptionCategory DwarfDumpCategory("Specific Options");
136static list<std::string>
137 InputFilenames(Positional, desc("<input object files or .dSYM bundles>"),
138 cat(DwarfDumpCategory));
139
140cl::OptionCategory SectionCategory("Section-specific Dump Options",
141 "These control which sections are dumped. "
142 "Where applicable these parameters take an "
143 "optional =<offset> argument to dump only "
144 "the entry at the specified offset.");
145
146static opt<bool> DumpAll("all", desc("Dump all debug info sections"),
147 cat(SectionCategory));
148static alias DumpAllAlias("a", desc("Alias for --all"), aliasopt(DumpAll),
149 cl::NotHidden);
150
151// Options for dumping specific sections.
152static unsigned DumpType = DIDT_Null;
153static std::array<std::optional<uint64_t>, (unsigned)DIDT_ID_Count> DumpOffsets;
154#define HANDLE_DWARF_SECTION(ENUM_NAME, ELF_NAME, CMDLINE_NAME, OPTION) \
155 static opt<OPTION> Dump##ENUM_NAME(CMDLINE_NAME, \
156 desc("Dump the " ELF_NAME " section"), \
157 cat(SectionCategory));
158#include "llvm/BinaryFormat/Dwarf.def"
159#undef HANDLE_DWARF_SECTION
160
161// The aliased DumpDebugFrame is created by the Dwarf.def x-macro just above.
162static alias DumpDebugFrameAlias("eh-frame", desc("Alias for --debug-frame"),
163 NotHidden, cat(SectionCategory),
164 aliasopt(DumpDebugFrame));
165static list<std::string>
166 ArchFilters("arch",
167 desc("Dump debug information for the specified CPU "
168 "architecture only. Architectures may be specified by "
169 "name or by number. This option can be specified "
170 "multiple times, once for each desired architecture."),
171 cat(DwarfDumpCategory));
172static opt<bool>
173 Diff("diff",
174 desc("Emit diff-friendly output by omitting offsets and addresses."),
175 cat(DwarfDumpCategory));
176static list<std::string>
177 Find("find",
178 desc("Search for the exact match for <name> in the accelerator tables "
179 "and print the matching debug information entries. When no "
180 "accelerator tables are available, the slower but more complete "
181 "-name option can be used instead."),
182 value_desc("name"), cat(DwarfDumpCategory));
183static alias FindAlias("f", desc("Alias for --find."), aliasopt(Find),
184 cl::NotHidden);
185static opt<bool> FindAllApple(
186 "find-all-apple",
187 desc("Print every debug information entry in the accelerator tables."),
188 cat(DwarfDumpCategory));
189static opt<bool> IgnoreCase("ignore-case",
190 desc("Ignore case distinctions when using --name."),
191 value_desc("i"), cat(DwarfDumpCategory));
192static opt<bool> DumpNonSkeleton(
193 "dwo",
194 desc("Dump the non skeleton DIE in the .dwo or .dwp file after dumping the "
195 "skeleton DIE from the main executable. This allows dumping the .dwo "
196 "files with resolved addresses."),
197 value_desc("d"), cat(DwarfDumpCategory));
198
199static alias IgnoreCaseAlias("i", desc("Alias for --ignore-case."),
200 aliasopt(IgnoreCase), cl::NotHidden);
201static list<std::string> Name(
202 "name",
203 desc("Find and print all debug info entries whose name (DW_AT_name "
204 "attribute) matches the exact text in <pattern>. When used with the "
205 "the -regex option <pattern> is interpreted as a regular expression."),
206 value_desc("pattern"), cat(DwarfDumpCategory));
207static alias NameAlias("n", desc("Alias for --name"), aliasopt(Name),
208 cl::NotHidden);
209static opt<uint64_t>
210 Lookup("lookup",
211 desc("Lookup <address> in the debug information and print out any "
212 "available file, function, block and line table details."),
213 value_desc("address"), cat(DwarfDumpCategory));
214static opt<std::string>
215 OutputFilename("o", cl::init(Val: "-"),
216 cl::desc("Redirect output to the specified file."),
217 cl::value_desc("filename"), cat(DwarfDumpCategory));
218static alias OutputFilenameAlias("out-file", desc("Alias for -o."),
219 aliasopt(OutputFilename));
220static opt<bool> UseRegex(
221 "regex",
222 desc("Treat any <pattern> strings as regular "
223 "expressions when searching with --name. If --ignore-case is also "
224 "specified, the regular expression becomes case-insensitive."),
225 cat(DwarfDumpCategory));
226static alias RegexAlias("x", desc("Alias for --regex"), aliasopt(UseRegex),
227 cl::NotHidden);
228static opt<bool>
229 ShowChildren("show-children",
230 desc("Show a debug info entry's children when selectively "
231 "printing entries."),
232 cat(DwarfDumpCategory));
233static alias ShowChildrenAlias("c", desc("Alias for --show-children."),
234 aliasopt(ShowChildren), cl::NotHidden);
235static opt<bool>
236 ShowParents("show-parents",
237 desc("Show a debug info entry's parents when selectively "
238 "printing entries."),
239 cat(DwarfDumpCategory));
240static alias ShowParentsAlias("p", desc("Alias for --show-parents."),
241 aliasopt(ShowParents), cl::NotHidden);
242static opt<bool>
243 ShowForm("show-form",
244 desc("Show DWARF form types after the DWARF attribute types."),
245 cat(DwarfDumpCategory));
246static alias ShowFormAlias("F", desc("Alias for --show-form."),
247 aliasopt(ShowForm), cat(DwarfDumpCategory),
248 cl::NotHidden);
249static opt<unsigned>
250 ChildRecurseDepth("recurse-depth",
251 desc("Only recurse to a depth of N when displaying "
252 "children of debug info entries."),
253 cat(DwarfDumpCategory), init(Val: -1U), value_desc("N"));
254static alias ChildRecurseDepthAlias("r", desc("Alias for --recurse-depth."),
255 aliasopt(ChildRecurseDepth), cl::NotHidden);
256static opt<unsigned>
257 ParentRecurseDepth("parent-recurse-depth",
258 desc("Only recurse to a depth of N when displaying "
259 "parents of debug info entries."),
260 cat(DwarfDumpCategory), init(Val: -1U), value_desc("N"));
261static opt<bool>
262 SummarizeTypes("summarize-types",
263 desc("Abbreviate the description of type unit entries."),
264 cat(DwarfDumpCategory));
265static cl::opt<bool>
266 Statistics("statistics",
267 cl::desc("Emit JSON-formatted debug info quality metrics."),
268 cat(DwarfDumpCategory));
269static cl::opt<bool>
270 ShowSectionSizes("show-section-sizes",
271 cl::desc("Show the sizes of all debug sections, "
272 "expressed in bytes."),
273 cat(DwarfDumpCategory));
274static cl::opt<bool> ManuallyGenerateUnitIndex(
275 "manaully-generate-unit-index",
276 cl::desc("if the input is dwp file, parse .debug_info "
277 "section and use it to populate "
278 "DW_SECT_INFO contributions in cu-index. "
279 "For DWARF5 it also populated TU Index."),
280 cl::init(Val: false), cl::Hidden, cl::cat(DwarfDumpCategory));
281static cl::opt<bool>
282 ShowSources("show-sources",
283 cl::desc("Show the sources across all compilation units."),
284 cat(DwarfDumpCategory));
285static opt<bool> Verify("verify", desc("Verify the DWARF debug info."),
286 cat(DwarfDumpCategory));
287static opt<ErrorDetailLevel> ErrorDetails(
288 "error-display", init(Val: Unspecified),
289 desc("Set the level of detail and summary to display when verifying "
290 "(implies --verify)"),
291 values(clEnumValN(NoDetailsOrSummary, "quiet",
292 "Only display whether errors occurred."),
293 clEnumValN(NoDetailsOnlySummary, "summary",
294 "Display only a summary of the errors found."),
295 clEnumValN(OnlyDetailsNoSummary, "details",
296 "Display each error in detail but no summary."),
297 clEnumValN(BothDetailsAndSummary, "full",
298 "Display each error as well as a summary. [default]")),
299 cat(DwarfDumpCategory));
300static opt<std::string> JsonErrSummaryFile(
301 "verify-json", init(Val: ""),
302 desc("Output JSON-formatted error summary to the specified file. "
303 "(Implies --verify)"),
304 value_desc("filename.json"), cat(DwarfDumpCategory));
305static opt<bool> Quiet("quiet", desc("Use with -verify to not emit to STDOUT."),
306 cat(DwarfDumpCategory));
307static opt<bool> DumpUUID("uuid", desc("Show the UUID for each architecture."),
308 cat(DwarfDumpCategory));
309static alias DumpUUIDAlias("u", desc("Alias for --uuid."), aliasopt(DumpUUID),
310 cl::NotHidden);
311static opt<bool> Verbose("verbose",
312 desc("Print more low-level encoding details."),
313 cat(DwarfDumpCategory));
314static alias VerboseAlias("v", desc("Alias for --verbose."), aliasopt(Verbose),
315 cat(DwarfDumpCategory), cl::NotHidden);
316static cl::extrahelp
317 HelpResponse("\nPass @FILE as argument to read options from FILE.\n");
318} // namespace
319/// @}
320//===----------------------------------------------------------------------===//
321
322static void error(Error Err) {
323 if (!Err)
324 return;
325 WithColor::error() << toString(E: std::move(Err)) << "\n";
326 exit(status: 1);
327}
328
329static void error(StringRef Prefix, Error Err) {
330 if (!Err)
331 return;
332 WithColor::error() << Prefix << ": " << toString(E: std::move(Err)) << "\n";
333 exit(status: 1);
334}
335
336static void error(StringRef Prefix, std::error_code EC) {
337 error(Prefix, Err: errorCodeToError(EC));
338}
339
340static DIDumpOptions getDumpOpts(DWARFContext &C) {
341 DIDumpOptions DumpOpts;
342 DumpOpts.DumpType = DumpType;
343 DumpOpts.ChildRecurseDepth = ChildRecurseDepth;
344 DumpOpts.ParentRecurseDepth = ParentRecurseDepth;
345 DumpOpts.ShowAddresses = !Diff;
346 DumpOpts.ShowChildren = ShowChildren;
347 DumpOpts.ShowParents = ShowParents;
348 DumpOpts.ShowForm = ShowForm;
349 DumpOpts.SummarizeTypes = SummarizeTypes;
350 DumpOpts.Verbose = Verbose;
351 DumpOpts.DumpNonSkeleton = DumpNonSkeleton;
352 DumpOpts.RecoverableErrorHandler = C.getRecoverableErrorHandler();
353 // In -verify mode, print DIEs without children in error messages.
354 if (Verify) {
355 DumpOpts.Verbose = ErrorDetails != NoDetailsOnlySummary &&
356 ErrorDetails != NoDetailsOrSummary;
357 DumpOpts.ShowAggregateErrors = ErrorDetails != OnlyDetailsNoSummary &&
358 ErrorDetails != NoDetailsOnlySummary;
359 DumpOpts.JsonErrSummaryFile = JsonErrSummaryFile;
360 return DumpOpts.noImplicitRecursion();
361 }
362 return DumpOpts;
363}
364
365static uint32_t getCPUType(MachOObjectFile &MachO) {
366 if (MachO.is64Bit())
367 return MachO.getHeader64().cputype;
368 else
369 return MachO.getHeader().cputype;
370}
371
372/// Return true if the object file has not been filtered by an --arch option.
373static bool filterArch(ObjectFile &Obj) {
374 if (ArchFilters.empty())
375 return true;
376
377 if (auto *MachO = dyn_cast<MachOObjectFile>(Val: &Obj)) {
378 for (const StringRef Arch : ArchFilters) {
379 // Match architecture number.
380 unsigned Value;
381 if (!Arch.getAsInteger(Radix: 0, Result&: Value))
382 if (Value == getCPUType(MachO&: *MachO))
383 return true;
384
385 // Match as name.
386 if (MachO->getArchTriple().getArchName() == Triple(Arch).getArchName())
387 return true;
388 }
389 }
390 return false;
391}
392
393using HandlerFn = std::function<bool(ObjectFile &, DWARFContext &DICtx,
394 const Twine &, raw_ostream &)>;
395
396/// Print only DIEs that have a certain name.
397static bool filterByName(
398 const StringSet<> &Names, DWARFDie Die, StringRef NameRef, raw_ostream &OS,
399 std::function<StringRef(uint64_t RegNum, bool IsEH)> GetNameForDWARFReg) {
400 DIDumpOptions DumpOpts = getDumpOpts(C&: Die.getDwarfUnit()->getContext());
401 DumpOpts.GetNameForDWARFReg = GetNameForDWARFReg;
402 std::string Name =
403 (IgnoreCase && !UseRegex) ? NameRef.lower() : NameRef.str();
404 if (UseRegex) {
405 // Match regular expression.
406 for (auto Pattern : Names.keys()) {
407 Regex RE(Pattern, IgnoreCase ? Regex::IgnoreCase : Regex::NoFlags);
408 std::string Error;
409 if (!RE.isValid(Error)) {
410 errs() << "error in regular expression: " << Error << "\n";
411 exit(status: 1);
412 }
413 if (RE.match(String: Name)) {
414 Die.dump(OS, indent: 0, DumpOpts);
415 return true;
416 }
417 }
418 } else if (Names.count(Key: Name)) {
419 // Match full text.
420 Die.dump(OS, indent: 0, DumpOpts);
421 return true;
422 }
423 return false;
424}
425
426/// Print only DIEs that have a certain name.
427static void filterByName(
428 const StringSet<> &Names, DWARFContext::unit_iterator_range CUs,
429 raw_ostream &OS,
430 std::function<StringRef(uint64_t RegNum, bool IsEH)> GetNameForDWARFReg) {
431 auto filterDieNames = [&](DWARFUnit *Unit) {
432 for (const auto &Entry : Unit->dies()) {
433 DWARFDie Die = {Unit, &Entry};
434 if (const char *Name = Die.getName(Kind: DINameKind::ShortName))
435 if (filterByName(Names, Die, NameRef: Name, OS, GetNameForDWARFReg))
436 continue;
437 if (const char *Name = Die.getName(Kind: DINameKind::LinkageName))
438 filterByName(Names, Die, NameRef: Name, OS, GetNameForDWARFReg);
439 }
440 };
441 for (const auto &CU : CUs) {
442 filterDieNames(CU.get());
443 if (DumpNonSkeleton) {
444 // If we have split DWARF, then recurse down into the .dwo files as well.
445 DWARFDie CUDie = CU->getUnitDIE(ExtractUnitDIEOnly: false);
446 DWARFDie CUNonSkeletonDie = CU->getNonSkeletonUnitDIE(ExtractUnitDIEOnly: false);
447 // If we have a DWO file, we need to search it as well
448 if (CUNonSkeletonDie && CUDie != CUNonSkeletonDie)
449 filterDieNames(CUNonSkeletonDie.getDwarfUnit());
450 }
451 }
452}
453
454static void getDies(DWARFContext &DICtx, const AppleAcceleratorTable &Accel,
455 StringRef Name, SmallVectorImpl<DWARFDie> &Dies) {
456 for (const auto &Entry : Accel.equal_range(Key: Name)) {
457 if (std::optional<uint64_t> Off = Entry.getDIESectionOffset()) {
458 if (DWARFDie Die = DICtx.getDIEForOffset(Offset: *Off))
459 Dies.push_back(Elt: Die);
460 }
461 }
462}
463
464static DWARFDie toDie(const DWARFDebugNames::Entry &Entry,
465 DWARFContext &DICtx) {
466 std::optional<uint64_t> CUOff = Entry.getCUOffset();
467 std::optional<uint64_t> Off = Entry.getDIEUnitOffset();
468 if (!CUOff || !Off)
469 return DWARFDie();
470
471 DWARFCompileUnit *CU = DICtx.getCompileUnitForOffset(Offset: *CUOff);
472 if (!CU)
473 return DWARFDie();
474
475 if (std::optional<uint64_t> DWOId = CU->getDWOId()) {
476 // This is a skeleton unit. Look up the DIE in the DWO unit.
477 CU = DICtx.getDWOCompileUnitForHash(Hash: *DWOId);
478 if (!CU)
479 return DWARFDie();
480 }
481
482 return CU->getDIEForOffset(Offset: CU->getOffset() + *Off);
483}
484
485static void getDies(DWARFContext &DICtx, const DWARFDebugNames &Accel,
486 StringRef Name, SmallVectorImpl<DWARFDie> &Dies) {
487 for (const auto &Entry : Accel.equal_range(Key: Name)) {
488 if (DWARFDie Die = toDie(Entry, DICtx))
489 Dies.push_back(Elt: Die);
490 }
491}
492
493/// Print only DIEs that have a certain name.
494static void filterByAccelName(
495 ArrayRef<std::string> Names, DWARFContext &DICtx, raw_ostream &OS,
496 std::function<StringRef(uint64_t RegNum, bool IsEH)> GetNameForDWARFReg) {
497 SmallVector<DWARFDie, 4> Dies;
498 for (const auto &Name : Names) {
499 getDies(DICtx, Accel: DICtx.getAppleNames(), Name, Dies);
500 getDies(DICtx, Accel: DICtx.getAppleTypes(), Name, Dies);
501 getDies(DICtx, Accel: DICtx.getAppleNamespaces(), Name, Dies);
502 getDies(DICtx, Accel: DICtx.getDebugNames(), Name, Dies);
503 }
504 llvm::sort(C&: Dies);
505 Dies.erase(CS: std::unique(first: Dies.begin(), last: Dies.end()), CE: Dies.end());
506
507 DIDumpOptions DumpOpts = getDumpOpts(C&: DICtx);
508 DumpOpts.GetNameForDWARFReg = GetNameForDWARFReg;
509 for (DWARFDie Die : Dies)
510 Die.dump(OS, indent: 0, DumpOpts);
511}
512
513/// Print all DIEs in apple accelerator tables
514static void findAllApple(
515 DWARFContext &DICtx, raw_ostream &OS,
516 std::function<StringRef(uint64_t RegNum, bool IsEH)> GetNameForDWARFReg) {
517 MapVector<StringRef, llvm::SmallSet<DWARFDie, 2>> NameToDies;
518
519 auto PushDIEs = [&](const AppleAcceleratorTable &Accel) {
520 for (const auto &Entry : Accel.entries()) {
521 if (std::optional<uint64_t> Off = Entry.BaseEntry.getDIESectionOffset()) {
522 std::optional<StringRef> MaybeName = Entry.readName();
523 DWARFDie Die = DICtx.getDIEForOffset(Offset: *Off);
524 if (Die && MaybeName)
525 NameToDies[*MaybeName].insert(V: Die);
526 }
527 }
528 };
529
530 PushDIEs(DICtx.getAppleNames());
531 PushDIEs(DICtx.getAppleNamespaces());
532 PushDIEs(DICtx.getAppleTypes());
533
534 DIDumpOptions DumpOpts = getDumpOpts(C&: DICtx);
535 DumpOpts.GetNameForDWARFReg = GetNameForDWARFReg;
536 for (const auto &[Name, Dies] : NameToDies) {
537 OS << llvm::formatv(Fmt: "\nApple accelerator entries with name = \"{0}\":\n",
538 Vals: Name);
539 for (DWARFDie Die : Dies)
540 Die.dump(OS, indent: 0, DumpOpts);
541 }
542}
543
544/// Handle the --lookup option and dump the DIEs and line info for the given
545/// address.
546/// TODO: specified Address for --lookup option could relate for several
547/// different sections(in case not-linked object file). llvm-dwarfdump
548/// need to do something with this: extend lookup option with section
549/// information or probably display all matched entries, or something else...
550static bool lookup(ObjectFile &Obj, DWARFContext &DICtx, uint64_t Address,
551 raw_ostream &OS) {
552 auto DIEsForAddr = DICtx.getDIEsForAddress(Address: Lookup, CheckDWO: DumpNonSkeleton);
553
554 if (!DIEsForAddr)
555 return false;
556
557 DIDumpOptions DumpOpts = getDumpOpts(C&: DICtx);
558 DumpOpts.ChildRecurseDepth = 0;
559 DIEsForAddr.CompileUnit->dump(OS, DumpOpts);
560 if (DIEsForAddr.FunctionDIE) {
561 DIEsForAddr.FunctionDIE.dump(OS, indent: 2, DumpOpts);
562 if (DIEsForAddr.BlockDIE)
563 DIEsForAddr.BlockDIE.dump(OS, indent: 4, DumpOpts);
564 }
565
566 // TODO: it is neccessary to set proper SectionIndex here.
567 // object::SectionedAddress::UndefSection works for only absolute addresses.
568 if (DILineInfo LineInfo = DICtx.getLineInfoForAddress(
569 Address: {.Address: Lookup, .SectionIndex: object::SectionedAddress::UndefSection}))
570 LineInfo.dump(OS);
571
572 return true;
573}
574
575// Collect all sources referenced from the given line table, scoped to the given
576// CU compilation directory.
577static bool collectLineTableSources(const DWARFDebugLine::LineTable &LT,
578 StringRef CompDir,
579 std::vector<std::string> &Sources) {
580 bool Result = true;
581 std::optional<uint64_t> LastIndex = LT.getLastValidFileIndex();
582 for (uint64_t I = LT.hasFileAtIndex(FileIndex: 0) ? 0 : 1,
583 E = LastIndex ? *LastIndex + 1 : 0;
584 I < E; ++I) {
585 std::string Path;
586 Result &= LT.getFileNameByIndex(
587 FileIndex: I, CompDir, Kind: DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath,
588 Result&: Path);
589 Sources.push_back(x: std::move(Path));
590 }
591 return Result;
592}
593
594static bool collectObjectSources(ObjectFile &Obj, DWARFContext &DICtx,
595 const Twine &Filename, raw_ostream &OS) {
596 bool Result = true;
597 std::vector<std::string> Sources;
598
599 bool HasCompileUnits = false;
600 for (const auto &CU : DICtx.compile_units()) {
601 HasCompileUnits = true;
602 // Extract paths from the line table for this CU. This allows combining the
603 // compilation directory with the line information, in case both the include
604 // directory and file names in the line table are relative.
605 const DWARFDebugLine::LineTable *LT = DICtx.getLineTableForUnit(U: CU.get());
606 StringRef CompDir = CU->getCompilationDir();
607 if (LT) {
608 Result &= collectLineTableSources(LT: *LT, CompDir, Sources);
609 } else {
610 // Since there's no line table for this CU, collect the name from the CU
611 // itself.
612 const char *Name = CU->getUnitDIE().getShortName();
613 if (!Name) {
614 WithColor::warning()
615 << Filename << ": missing name for compilation unit\n";
616 continue;
617 }
618 SmallString<64> AbsName;
619 if (sys::path::is_relative(path: Name, style: sys::path::Style::posix) &&
620 sys::path::is_relative(path: Name, style: sys::path::Style::windows))
621 AbsName = CompDir;
622 sys::path::append(path&: AbsName, a: Name);
623 Sources.push_back(x: std::string(AbsName));
624 }
625 }
626
627 if (!HasCompileUnits) {
628 // Since there's no compile units available, walk the line tables and
629 // extract out any referenced paths.
630 DWARFDataExtractor LineData(DICtx.getDWARFObj(),
631 DICtx.getDWARFObj().getLineSection(),
632 DICtx.isLittleEndian(), 0);
633 DWARFDebugLine::SectionParser Parser(LineData, DICtx, DICtx.normal_units());
634 while (!Parser.done()) {
635 const auto RecoverableErrorHandler = [&](Error Err) {
636 Result = false;
637 WithColor::defaultErrorHandler(Err: std::move(Err));
638 };
639 void (*UnrecoverableErrorHandler)(Error Err) = error;
640
641 DWARFDebugLine::LineTable LT =
642 Parser.parseNext(RecoverableErrorHandler, UnrecoverableErrorHandler);
643 Result &= collectLineTableSources(LT, /*CompDir=*/"", Sources);
644 }
645 }
646
647 // Dedup and order the sources.
648 llvm::sort(C&: Sources);
649 Sources.erase(first: std::unique(first: Sources.begin(), last: Sources.end()), last: Sources.end());
650
651 for (StringRef Name : Sources)
652 OS << Name << "\n";
653 return Result;
654}
655
656static std::unique_ptr<MCRegisterInfo>
657createRegInfo(const object::ObjectFile &Obj) {
658 std::unique_ptr<MCRegisterInfo> MCRegInfo;
659 Triple TT;
660 TT.setArch(Kind: Triple::ArchType(Obj.getArch()));
661 TT.setVendor(Triple::UnknownVendor);
662 TT.setOS(Triple::UnknownOS);
663 std::string TargetLookupError;
664 const Target *TheTarget =
665 TargetRegistry::lookupTarget(Triple: TT.str(), Error&: TargetLookupError);
666 if (!TargetLookupError.empty())
667 return nullptr;
668 MCRegInfo.reset(p: TheTarget->createMCRegInfo(TT: TT.str()));
669 return MCRegInfo;
670}
671
672static bool dumpObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
673 const Twine &Filename, raw_ostream &OS) {
674
675 auto MCRegInfo = createRegInfo(Obj);
676 if (!MCRegInfo)
677 logAllUnhandledErrors(E: createStringError(EC: inconvertibleErrorCode(),
678 Msg: "Error in creating MCRegInfo"),
679 OS&: errs(), ErrorBanner: Filename.str() + ": ");
680
681 auto GetRegName = [&MCRegInfo](uint64_t DwarfRegNum, bool IsEH) -> StringRef {
682 if (!MCRegInfo)
683 return {};
684 if (std::optional<unsigned> LLVMRegNum =
685 MCRegInfo->getLLVMRegNum(RegNum: DwarfRegNum, isEH: IsEH))
686 if (const char *RegName = MCRegInfo->getName(RegNo: *LLVMRegNum))
687 return StringRef(RegName);
688 return {};
689 };
690
691 // The UUID dump already contains all the same information.
692 if (!(DumpType & DIDT_UUID) || DumpType == DIDT_All)
693 OS << Filename << ":\tfile format " << Obj.getFileFormatName() << '\n';
694
695 // Handle the --lookup option.
696 if (Lookup)
697 return lookup(Obj, DICtx, Address: Lookup, OS);
698
699 // Handle the --name option.
700 if (!Name.empty()) {
701 StringSet<> Names;
702 for (const auto &name : Name)
703 Names.insert(key: (IgnoreCase && !UseRegex) ? StringRef(name).lower() : name);
704
705 filterByName(Names, CUs: DICtx.normal_units(), OS, GetNameForDWARFReg: GetRegName);
706 filterByName(Names, CUs: DICtx.dwo_units(), OS, GetNameForDWARFReg: GetRegName);
707 return true;
708 }
709
710 // Handle the --find option and lower it to --debug-info=<offset>.
711 if (!Find.empty()) {
712 filterByAccelName(Names: Find, DICtx, OS, GetNameForDWARFReg: GetRegName);
713 return true;
714 }
715
716 // Handle the --find-all-apple option and lower it to --debug-info=<offset>.
717 if (FindAllApple) {
718 findAllApple(DICtx, OS, GetNameForDWARFReg: GetRegName);
719 return true;
720 }
721
722 // Dump the complete DWARF structure.
723 auto DumpOpts = getDumpOpts(C&: DICtx);
724 DumpOpts.GetNameForDWARFReg = GetRegName;
725 DICtx.dump(OS, DumpOpts, DumpOffsets);
726 return true;
727}
728
729static bool verifyObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
730 const Twine &Filename, raw_ostream &OS) {
731 // Verify the DWARF and exit with non-zero exit status if verification
732 // fails.
733 raw_ostream &stream = Quiet ? nulls() : OS;
734 stream << "Verifying " << Filename.str() << ":\tfile format "
735 << Obj.getFileFormatName() << "\n";
736 bool Result = DICtx.verify(OS&: stream, DumpOpts: getDumpOpts(C&: DICtx));
737 if (Result)
738 stream << "No errors.\n";
739 else
740 stream << "Errors detected.\n";
741 return Result;
742}
743
744static bool handleBuffer(StringRef Filename, MemoryBufferRef Buffer,
745 HandlerFn HandleObj, raw_ostream &OS);
746
747static bool handleArchive(StringRef Filename, Archive &Arch,
748 HandlerFn HandleObj, raw_ostream &OS) {
749 bool Result = true;
750 Error Err = Error::success();
751 for (const auto &Child : Arch.children(Err)) {
752 auto BuffOrErr = Child.getMemoryBufferRef();
753 error(Prefix: Filename, Err: BuffOrErr.takeError());
754 auto NameOrErr = Child.getName();
755 error(Prefix: Filename, Err: NameOrErr.takeError());
756 std::string Name = (Filename + "(" + NameOrErr.get() + ")").str();
757 Result &= handleBuffer(Filename: Name, Buffer: BuffOrErr.get(), HandleObj, OS);
758 }
759 error(Prefix: Filename, Err: std::move(Err));
760
761 return Result;
762}
763
764static bool handleBuffer(StringRef Filename, MemoryBufferRef Buffer,
765 HandlerFn HandleObj, raw_ostream &OS) {
766 Expected<std::unique_ptr<Binary>> BinOrErr = object::createBinary(Source: Buffer);
767 error(Prefix: Filename, Err: BinOrErr.takeError());
768
769 bool Result = true;
770 auto RecoverableErrorHandler = [&](Error E) {
771 Result = false;
772 WithColor::defaultErrorHandler(Err: std::move(E));
773 };
774 if (auto *Obj = dyn_cast<ObjectFile>(Val: BinOrErr->get())) {
775 if (filterArch(Obj&: *Obj)) {
776 std::unique_ptr<DWARFContext> DICtx = DWARFContext::create(
777 Obj: *Obj, RelocAction: DWARFContext::ProcessDebugRelocations::Process, L: nullptr, DWPName: "",
778 RecoverableErrorHandler);
779 DICtx->setParseCUTUIndexManually(ManuallyGenerateUnitIndex);
780 if (!HandleObj(*Obj, *DICtx, Filename, OS))
781 Result = false;
782 }
783 } else if (auto *Fat = dyn_cast<MachOUniversalBinary>(Val: BinOrErr->get()))
784 for (auto &ObjForArch : Fat->objects()) {
785 std::string ObjName =
786 (Filename + "(" + ObjForArch.getArchFlagName() + ")").str();
787 if (auto MachOOrErr = ObjForArch.getAsObjectFile()) {
788 auto &Obj = **MachOOrErr;
789 if (filterArch(Obj)) {
790 std::unique_ptr<DWARFContext> DICtx = DWARFContext::create(
791 Obj, RelocAction: DWARFContext::ProcessDebugRelocations::Process, L: nullptr, DWPName: "",
792 RecoverableErrorHandler);
793 if (!HandleObj(Obj, *DICtx, ObjName, OS))
794 Result = false;
795 }
796 continue;
797 } else
798 consumeError(Err: MachOOrErr.takeError());
799 if (auto ArchiveOrErr = ObjForArch.getAsArchive()) {
800 error(Prefix: ObjName, Err: ArchiveOrErr.takeError());
801 if (!handleArchive(Filename: ObjName, Arch&: *ArchiveOrErr.get(), HandleObj, OS))
802 Result = false;
803 continue;
804 } else
805 consumeError(Err: ArchiveOrErr.takeError());
806 }
807 else if (auto *Arch = dyn_cast<Archive>(Val: BinOrErr->get()))
808 Result = handleArchive(Filename, Arch&: *Arch, HandleObj, OS);
809 return Result;
810}
811
812static bool handleFile(StringRef Filename, HandlerFn HandleObj,
813 raw_ostream &OS) {
814 ErrorOr<std::unique_ptr<MemoryBuffer>> BuffOrErr =
815 MemoryBuffer::getFileOrSTDIN(Filename);
816 error(Prefix: Filename, EC: BuffOrErr.getError());
817 std::unique_ptr<MemoryBuffer> Buffer = std::move(BuffOrErr.get());
818 return handleBuffer(Filename, Buffer: *Buffer, HandleObj, OS);
819}
820
821int main(int argc, char **argv) {
822 InitLLVM X(argc, argv);
823
824 // Flush outs() when printing to errs(). This avoids interleaving output
825 // between the two.
826 errs().tie(TieTo: &outs());
827
828 llvm::InitializeAllTargetInfos();
829 llvm::InitializeAllTargetMCs();
830
831 HideUnrelatedOptions(
832 Categories: {&DwarfDumpCategory, &SectionCategory, &getColorCategory()});
833 cl::ParseCommandLineOptions(
834 argc, argv,
835 Overview: "pretty-print DWARF debug information in object files"
836 " and debug info archives.\n");
837
838 // FIXME: Audit interactions between these two options and make them
839 // compatible.
840 if (Diff && Verbose) {
841 WithColor::error() << "incompatible arguments: specifying both -diff and "
842 "-verbose is currently not supported";
843 return 1;
844 }
845 // -error-detail and -json-summary-file both imply -verify
846 if (ErrorDetails != Unspecified || !JsonErrSummaryFile.empty()) {
847 Verify = true;
848 }
849
850 std::error_code EC;
851 ToolOutputFile OutputFile(OutputFilename, EC, sys::fs::OF_TextWithCRLF);
852 error(Prefix: "unable to open output file " + OutputFilename, EC);
853 // Don't remove output file if we exit with an error.
854 OutputFile.keep();
855
856 bool OffsetRequested = false;
857
858 // Defaults to dumping only debug_info, unless: A) verbose mode is specified,
859 // in which case all sections are dumped, or B) a specific section is
860 // requested.
861#define HANDLE_DWARF_SECTION(ENUM_NAME, ELF_NAME, CMDLINE_NAME, OPTION) \
862 if (Dump##ENUM_NAME.IsRequested) { \
863 DumpType |= DIDT_##ENUM_NAME; \
864 if (Dump##ENUM_NAME.HasValue) { \
865 DumpOffsets[DIDT_ID_##ENUM_NAME] = Dump##ENUM_NAME.Val; \
866 OffsetRequested = true; \
867 } \
868 }
869#include "llvm/BinaryFormat/Dwarf.def"
870#undef HANDLE_DWARF_SECTION
871 if (DumpUUID)
872 DumpType |= DIDT_UUID;
873 if (DumpAll)
874 DumpType = DIDT_All;
875 if (DumpType == DIDT_Null) {
876 if (Verbose || Verify)
877 DumpType = DIDT_All;
878 else
879 DumpType = DIDT_DebugInfo;
880 }
881
882 // Unless dumping a specific DIE, default to --show-children.
883 if (!ShowChildren && !Verify && !OffsetRequested && Name.empty() &&
884 Find.empty() && !FindAllApple)
885 ShowChildren = true;
886
887 // Defaults to a.out if no filenames specified.
888 if (InputFilenames.empty())
889 InputFilenames.push_back(value: "a.out");
890
891 // Expand any .dSYM bundles to the individual object files contained therein.
892 std::vector<std::string> Objects;
893 for (const auto &F : InputFilenames) {
894 if (auto DsymObjectsOrErr = MachOObjectFile::findDsymObjectMembers(Path: F)) {
895 if (DsymObjectsOrErr->empty())
896 Objects.push_back(x: F);
897 else
898 llvm::append_range(C&: Objects, R&: *DsymObjectsOrErr);
899 } else {
900 error(Err: DsymObjectsOrErr.takeError());
901 }
902 }
903
904 bool Success = true;
905 if (Verify) {
906 for (StringRef Object : Objects)
907 Success &= handleFile(Filename: Object, HandleObj: verifyObjectFile, OS&: OutputFile.os());
908 } else if (Statistics) {
909 for (StringRef Object : Objects)
910 Success &= handleFile(Filename: Object, HandleObj: collectStatsForObjectFile, OS&: OutputFile.os());
911 } else if (ShowSectionSizes) {
912 for (StringRef Object : Objects)
913 Success &= handleFile(Filename: Object, HandleObj: collectObjectSectionSizes, OS&: OutputFile.os());
914 } else if (ShowSources) {
915 for (StringRef Object : Objects)
916 Success &= handleFile(Filename: Object, HandleObj: collectObjectSources, OS&: OutputFile.os());
917 } else {
918 for (StringRef Object : Objects)
919 Success &= handleFile(Filename: Object, HandleObj: dumpObjectFile, OS&: OutputFile.os());
920 }
921
922 return Success ? EXIT_SUCCESS : EXIT_FAILURE;
923}
924

source code of llvm/tools/llvm-dwarfdump/llvm-dwarfdump.cpp