Line data Source code
1 : //===- DWARFDie.cpp -------------------------------------------------------===//
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 : #include "llvm/DebugInfo/DWARF/DWARFDie.h"
11 : #include "llvm/ADT/None.h"
12 : #include "llvm/ADT/Optional.h"
13 : #include "llvm/ADT/SmallSet.h"
14 : #include "llvm/ADT/StringRef.h"
15 : #include "llvm/BinaryFormat/Dwarf.h"
16 : #include "llvm/DebugInfo/DWARF/DWARFAbbreviationDeclaration.h"
17 : #include "llvm/DebugInfo/DWARF/DWARFContext.h"
18 : #include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
19 : #include "llvm/DebugInfo/DWARF/DWARFExpression.h"
20 : #include "llvm/DebugInfo/DWARF/DWARFFormValue.h"
21 : #include "llvm/DebugInfo/DWARF/DWARFUnit.h"
22 : #include "llvm/Object/ObjectFile.h"
23 : #include "llvm/Support/DataExtractor.h"
24 : #include "llvm/Support/Format.h"
25 : #include "llvm/Support/FormatVariadic.h"
26 : #include "llvm/Support/MathExtras.h"
27 : #include "llvm/Support/WithColor.h"
28 : #include "llvm/Support/raw_ostream.h"
29 : #include <algorithm>
30 : #include <cassert>
31 : #include <cinttypes>
32 : #include <cstdint>
33 : #include <string>
34 : #include <utility>
35 :
36 : using namespace llvm;
37 : using namespace dwarf;
38 : using namespace object;
39 :
40 25 : static void dumpApplePropertyAttribute(raw_ostream &OS, uint64_t Val) {
41 25 : OS << " (";
42 : do {
43 : uint64_t Shift = countTrailingZeros(Val);
44 : assert(Shift < 64 && "undefined behavior");
45 98 : uint64_t Bit = 1ULL << Shift;
46 98 : auto PropName = ApplePropertyString(Bit);
47 98 : if (!PropName.empty())
48 98 : OS << PropName;
49 : else
50 0 : OS << format("DW_APPLE_PROPERTY_0x%" PRIx64, Bit);
51 98 : if (!(Val ^= Bit))
52 : break;
53 73 : OS << ", ";
54 : } while (true);
55 25 : OS << ")";
56 25 : }
57 :
58 0 : static void dumpRanges(const DWARFObject &Obj, raw_ostream &OS,
59 : const DWARFAddressRangesVector &Ranges,
60 : unsigned AddressSize, unsigned Indent,
61 : const DIDumpOptions &DumpOpts) {
62 : ArrayRef<SectionName> SectionNames;
63 0 : if (DumpOpts.Verbose)
64 0 : SectionNames = Obj.getSectionNames();
65 :
66 0 : for (const DWARFAddressRange &R : Ranges) {
67 :
68 : OS << '\n';
69 0 : OS.indent(Indent);
70 0 : R.dump(OS, AddressSize);
71 :
72 0 : if (SectionNames.empty() || R.SectionIndex == -1ULL)
73 0 : continue;
74 :
75 0 : StringRef Name = SectionNames[R.SectionIndex].Name;
76 0 : OS << " \"" << Name << '\"';
77 :
78 : // Print section index if name is not unique.
79 0 : if (!SectionNames[R.SectionIndex].IsNameUnique)
80 0 : OS << format(" [%" PRIu64 "]", R.SectionIndex);
81 : }
82 0 : }
83 :
84 2303 : static void dumpLocation(raw_ostream &OS, DWARFFormValue &FormValue,
85 : DWARFUnit *U, unsigned Indent,
86 : DIDumpOptions DumpOpts) {
87 2303 : DWARFContext &Ctx = U->getContext();
88 : const DWARFObject &Obj = Ctx.getDWARFObj();
89 : const MCRegisterInfo *MRI = Ctx.getRegisterInfo();
90 3828 : if (FormValue.isFormClass(DWARFFormValue::FC_Block) ||
91 1525 : FormValue.isFormClass(DWARFFormValue::FC_Exprloc)) {
92 1905 : ArrayRef<uint8_t> Expr = *FormValue.getAsBlock();
93 : DataExtractor Data(StringRef((const char *)Expr.data(), Expr.size()),
94 : Ctx.isLittleEndian(), 0);
95 1905 : DWARFExpression(Data, U->getVersion(), U->getAddressByteSize())
96 1905 : .print(OS, MRI);
97 : return;
98 : }
99 :
100 398 : FormValue.dump(OS, DumpOpts);
101 398 : if (FormValue.isFormClass(DWARFFormValue::FC_SectionOffset)) {
102 171 : const DWARFSection &LocSection = Obj.getLocSection();
103 171 : const DWARFSection &LocDWOSection = Obj.getLocDWOSection();
104 171 : uint32_t Offset = *FormValue.getAsSectionOffset();
105 171 : if (!LocSection.Data.empty()) {
106 : DWARFDebugLoc DebugLoc;
107 : DWARFDataExtractor Data(Obj, LocSection, Ctx.isLittleEndian(),
108 166 : Obj.getAddressSize());
109 166 : auto LL = DebugLoc.parseOneLocationList(Data, &Offset);
110 166 : if (LL) {
111 : uint64_t BaseAddr = 0;
112 166 : if (Optional<BaseAddress> BA = U->getBaseAddress())
113 164 : BaseAddr = BA->Address;
114 166 : LL->dump(OS, Ctx.isLittleEndian(), Obj.getAddressSize(), MRI, BaseAddr,
115 : Indent);
116 : } else
117 0 : OS << "error extracting location list.";
118 5 : } else if (!LocDWOSection.Data.empty()) {
119 : DataExtractor Data(LocDWOSection.Data, Ctx.isLittleEndian(), 0);
120 5 : auto LL = DWARFDebugLocDWO::parseOneLocationList(Data, &Offset);
121 5 : if (LL)
122 5 : LL->dump(OS, Ctx.isLittleEndian(), Obj.getAddressSize(), MRI, Indent);
123 : else
124 0 : OS << "error extracting location list.";
125 : }
126 : }
127 : }
128 :
129 : /// Dump the name encoded in the type tag.
130 299 : static void dumpTypeTagName(raw_ostream &OS, dwarf::Tag T) {
131 299 : StringRef TagStr = TagString(T);
132 : if (!TagStr.startswith("DW_TAG_") || !TagStr.endswith("_type"))
133 3 : return;
134 592 : OS << TagStr.substr(7, TagStr.size() - 12) << " ";
135 : }
136 :
137 : /// Recursively dump the DIE type name when applicable.
138 3846 : static void dumpTypeName(raw_ostream &OS, const DWARFDie &Die) {
139 3846 : DWARFDie D = Die.getAttributeValueAsReferencedDie(DW_AT_type);
140 :
141 3846 : if (!D.isValid())
142 2909 : return;
143 :
144 3705 : if (const char *Name = D.getName(DINameKind::LinkageName)) {
145 2768 : OS << Name;
146 2768 : return;
147 : }
148 :
149 : // FIXME: We should have pretty printers per language. Currently we print
150 : // everything as if it was C++ and fall back to the TAG type name.
151 : const dwarf::Tag T = D.getTag();
152 934 : switch (T) {
153 : case DW_TAG_array_type:
154 : case DW_TAG_pointer_type:
155 : case DW_TAG_ptr_to_member_type:
156 : case DW_TAG_reference_type:
157 : case DW_TAG_rvalue_reference_type:
158 : break;
159 299 : default:
160 299 : dumpTypeTagName(OS, T);
161 : }
162 :
163 : // Follow the DW_AT_type if possible.
164 937 : dumpTypeName(OS, D);
165 :
166 937 : switch (T) {
167 40 : case DW_TAG_array_type:
168 40 : OS << "[]";
169 40 : break;
170 : case DW_TAG_pointer_type:
171 : OS << '*';
172 : break;
173 : case DW_TAG_ptr_to_member_type:
174 : OS << '*';
175 : break;
176 : case DW_TAG_reference_type:
177 : OS << '&';
178 : break;
179 1 : case DW_TAG_rvalue_reference_type:
180 1 : OS << "&&";
181 1 : break;
182 : default:
183 : break;
184 : }
185 : }
186 :
187 27889 : static void dumpAttribute(raw_ostream &OS, const DWARFDie &Die,
188 : uint32_t *OffsetPtr, dwarf::Attribute Attr,
189 : dwarf::Form Form, unsigned Indent,
190 : DIDumpOptions DumpOpts) {
191 27889 : if (!Die.isValid())
192 0 : return;
193 27889 : const char BaseIndent[] = " ";
194 27889 : OS << BaseIndent;
195 27889 : OS.indent(Indent + 2);
196 55778 : WithColor(OS, HighlightColor::Attribute) << formatv("{0}", Attr);
197 :
198 27889 : if (DumpOpts.Verbose || DumpOpts.ShowForm)
199 36498 : OS << formatv(" [{0}]", Form);
200 :
201 27889 : DWARFUnit *U = Die.getDwarfUnit();
202 27889 : DWARFFormValue formValue(Form);
203 :
204 55778 : if (!formValue.extractValue(U->getDebugInfoExtractor(), OffsetPtr,
205 : U->getFormParams(), U))
206 : return;
207 :
208 27889 : OS << "\t(";
209 :
210 27889 : StringRef Name;
211 : std::string File;
212 : auto Color = HighlightColor::Enumerator;
213 27889 : if (Attr == DW_AT_decl_file || Attr == DW_AT_call_file) {
214 : Color = HighlightColor::String;
215 2860 : if (const auto *LT = U->getContext().getLineTableForUnit(U))
216 5306 : if (LT->getFileNameByIndex(
217 5306 : formValue.getAsUnsignedConstant().getValue(),
218 : U->getCompilationDir(),
219 : DILineInfoSpecifier::FileLineInfoKind::AbsoluteFilePath, File)) {
220 5306 : File = '"' + File + '"';
221 2653 : Name = File;
222 : }
223 25029 : } else if (Optional<uint64_t> Val = formValue.getAsUnsignedConstant())
224 10182 : Name = AttributeValueString(Attr, *Val);
225 :
226 27889 : if (!Name.empty())
227 4330 : WithColor(OS, Color) << Name;
228 23559 : else if (Attr == DW_AT_decl_line || Attr == DW_AT_call_line)
229 2900 : OS << *formValue.getAsUnsignedConstant();
230 20659 : else if (Attr == DW_AT_high_pc && !DumpOpts.ShowForm && !DumpOpts.Verbose &&
231 21170 : formValue.getAsUnsignedConstant()) {
232 291 : if (DumpOpts.ShowAddresses) {
233 : // Print the actual address rather than the offset.
234 : uint64_t LowPC, HighPC, Index;
235 284 : if (Die.getLowAndHighPC(LowPC, HighPC, Index))
236 564 : OS << format("0x%016" PRIx64, HighPC);
237 : else
238 2 : formValue.dump(OS, DumpOpts);
239 : }
240 20368 : } else if (Attr == DW_AT_location || Attr == DW_AT_frame_base ||
241 18066 : Attr == DW_AT_data_member_location ||
242 : Attr == DW_AT_GNU_call_site_value)
243 2303 : dumpLocation(OS, formValue, U, sizeof(BaseIndent) + Indent + 4, DumpOpts);
244 : else
245 18065 : formValue.dump(OS, DumpOpts);
246 :
247 27984 : std::string Space = DumpOpts.ShowAddresses ? " " : "";
248 :
249 : // We have dumped the attribute raw value. For some attributes
250 : // having both the raw value and the pretty-printed value is
251 : // interesting. These attributes are handled below.
252 27889 : if (Attr == DW_AT_specification || Attr == DW_AT_abstract_origin) {
253 339 : if (const char *Name = Die.getAttributeValueAsReferencedDie(Attr).getName(
254 : DINameKind::LinkageName))
255 336 : OS << Space << "\"" << Name << '\"';
256 27550 : } else if (Attr == DW_AT_type) {
257 2909 : OS << Space << "\"";
258 2909 : dumpTypeName(OS, Die);
259 : OS << '"';
260 24641 : } else if (Attr == DW_AT_APPLE_property_attribute) {
261 25 : if (Optional<uint64_t> OptVal = formValue.getAsUnsignedConstant())
262 25 : dumpApplePropertyAttribute(OS, *OptVal);
263 24616 : } else if (Attr == DW_AT_ranges) {
264 55 : const DWARFObject &Obj = Die.getDwarfUnit()->getContext().getDWARFObj();
265 : // For DW_FORM_rnglistx we need to dump the offset separately, since
266 : // we have only dumped the index so far.
267 55 : Optional<DWARFFormValue> Value = Die.find(DW_AT_ranges);
268 55 : if (Value && Value->getForm() == DW_FORM_rnglistx)
269 3 : if (auto RangeListOffset =
270 5 : U->getRnglistOffset(*Value->getAsSectionOffset())) {
271 : DWARFFormValue FV(dwarf::DW_FORM_sec_offset);
272 2 : FV.setUValue(*RangeListOffset);
273 2 : FV.dump(OS, DumpOpts);
274 : }
275 110 : if (auto RangesOrError = Die.getAddressRanges())
276 147 : dumpRanges(Obj, OS, RangesOrError.get(), U->getAddressByteSize(),
277 : sizeof(BaseIndent) + Indent + 4, DumpOpts);
278 : else
279 6 : WithColor::error() << "decoding address ranges: "
280 12 : << toString(RangesOrError.takeError()) << '\n';
281 : }
282 :
283 27889 : OS << ")\n";
284 : }
285 :
286 1769 : bool DWARFDie::isSubprogramDIE() const { return getTag() == DW_TAG_subprogram; }
287 :
288 22590 : bool DWARFDie::isSubroutineDIE() const {
289 : auto Tag = getTag();
290 22590 : return Tag == DW_TAG_subprogram || Tag == DW_TAG_inlined_subroutine;
291 : }
292 :
293 68051 : Optional<DWARFFormValue> DWARFDie::find(dwarf::Attribute Attr) const {
294 68051 : if (!isValid())
295 : return None;
296 : auto AbbrevDecl = getAbbreviationDeclarationPtr();
297 68051 : if (AbbrevDecl)
298 133524 : return AbbrevDecl->getAttributeValue(getOffset(), Attr, *U);
299 : return None;
300 : }
301 :
302 : Optional<DWARFFormValue>
303 17855 : DWARFDie::find(ArrayRef<dwarf::Attribute> Attrs) const {
304 17855 : if (!isValid())
305 : return None;
306 : auto AbbrevDecl = getAbbreviationDeclarationPtr();
307 17855 : if (AbbrevDecl) {
308 32470 : for (auto Attr : Attrs) {
309 48528 : if (auto Value = AbbrevDecl->getAttributeValue(getOffset(), Attr, *U))
310 : return Value;
311 : }
312 : }
313 : return None;
314 : }
315 :
316 : Optional<DWARFFormValue>
317 15781 : DWARFDie::findRecursively(ArrayRef<dwarf::Attribute> Attrs) const {
318 : std::vector<DWARFDie> Worklist;
319 15781 : Worklist.push_back(*this);
320 :
321 : // Keep track if DIEs already seen to prevent infinite recursion.
322 : // Empirically we rarely see a depth of more than 3 when dealing with valid
323 : // DWARF. This corresponds to following the DW_AT_abstract_origin and
324 : // DW_AT_specification just once.
325 15781 : SmallSet<DWARFDie, 3> Seen;
326 :
327 24035 : while (!Worklist.empty()) {
328 16106 : DWARFDie Die = Worklist.back();
329 : Worklist.pop_back();
330 :
331 16106 : if (!Die.isValid())
332 2 : continue;
333 :
334 16106 : if (Seen.count(Die))
335 : continue;
336 :
337 16104 : Seen.insert(Die);
338 :
339 16104 : if (auto Value = Die.find(Attrs))
340 : return Value;
341 :
342 8252 : if (auto D = Die.getAttributeValueAsReferencedDie(DW_AT_abstract_origin))
343 283 : Worklist.push_back(D);
344 :
345 8252 : if (auto D = Die.getAttributeValueAsReferencedDie(DW_AT_specification))
346 43 : Worklist.push_back(D);
347 : }
348 :
349 : return None;
350 : }
351 :
352 : DWARFDie
353 21024 : DWARFDie::getAttributeValueAsReferencedDie(dwarf::Attribute Attr) const {
354 42048 : if (auto SpecRef = toReference(find(Attr))) {
355 4725 : if (auto SpecUnit = U->getUnitVector().getUnitForOffset(*SpecRef))
356 4708 : return SpecUnit->getDIEForOffset(*SpecRef);
357 : }
358 16316 : return DWARFDie();
359 : }
360 :
361 19 : Optional<uint64_t> DWARFDie::getRangesBaseAttribute() const {
362 19 : return toSectionOffset(find({DW_AT_rnglists_base, DW_AT_GNU_ranges_base}));
363 : }
364 :
365 2966 : Optional<uint64_t> DWARFDie::getHighPC(uint64_t LowPC) const {
366 2966 : if (auto FormValue = find(DW_AT_high_pc)) {
367 1768 : if (auto Address = FormValue->getAsAddress()) {
368 : // High PC is an address.
369 : return Address;
370 : }
371 1333 : if (auto Offset = FormValue->getAsUnsignedConstant()) {
372 : // High PC is an offset from LowPC.
373 1333 : return LowPC + *Offset;
374 : }
375 : }
376 : return None;
377 : }
378 :
379 6962 : bool DWARFDie::getLowAndHighPC(uint64_t &LowPC, uint64_t &HighPC,
380 : uint64_t &SectionIndex) const {
381 6962 : auto F = find(DW_AT_low_pc);
382 : auto LowPcAddr = toAddress(F);
383 6962 : if (!LowPcAddr)
384 : return false;
385 2692 : if (auto HighPcAddr = getHighPC(*LowPcAddr)) {
386 1507 : LowPC = *LowPcAddr;
387 1507 : HighPC = *HighPcAddr;
388 1507 : SectionIndex = F->getSectionIndex();
389 : return true;
390 : }
391 1185 : return false;
392 : }
393 :
394 6656 : Expected<DWARFAddressRangesVector> DWARFDie::getAddressRanges() const {
395 6656 : if (isNULL())
396 : return DWARFAddressRangesVector();
397 : // Single range specified by low/high PC.
398 : uint64_t LowPC, HighPC, Index;
399 6654 : if (getLowAndHighPC(LowPC, HighPC, Index))
400 1219 : return DWARFAddressRangesVector{{LowPC, HighPC, Index}};
401 :
402 5435 : Optional<DWARFFormValue> Value = find(DW_AT_ranges);
403 5435 : if (Value) {
404 1178 : if (Value->getForm() == DW_FORM_rnglistx)
405 5 : return U->findRnglistFromIndex(*Value->getAsSectionOffset());
406 1173 : return U->findRnglistFromOffset(*Value->getAsSectionOffset());
407 : }
408 : return DWARFAddressRangesVector();
409 : }
410 :
411 1010 : void DWARFDie::collectChildrenAddressRanges(
412 : DWARFAddressRangesVector &Ranges) const {
413 1010 : if (isNULL())
414 : return;
415 1010 : if (isSubprogramDIE()) {
416 148 : if (auto DIERangesOrError = getAddressRanges())
417 : Ranges.insert(Ranges.end(), DIERangesOrError.get().begin(),
418 74 : DIERangesOrError.get().end());
419 : else
420 0 : llvm::consumeError(DIERangesOrError.takeError());
421 : }
422 :
423 1010 : for (auto Child : children())
424 468 : Child.collectChildrenAddressRanges(Ranges);
425 : }
426 :
427 3 : bool DWARFDie::addressRangeContainsAddress(const uint64_t Address) const {
428 6 : auto RangesOrError = getAddressRanges();
429 3 : if (!RangesOrError) {
430 0 : llvm::consumeError(RangesOrError.takeError());
431 0 : return false;
432 : }
433 :
434 4 : for (const auto &R : RangesOrError.get())
435 3 : if (R.LowPC <= Address && Address < R.HighPC)
436 : return true;
437 : return false;
438 : }
439 :
440 584 : const char *DWARFDie::getSubroutineName(DINameKind Kind) const {
441 584 : if (!isSubroutineDIE())
442 : return nullptr;
443 584 : return getName(Kind);
444 : }
445 :
446 8746 : const char *DWARFDie::getName(DINameKind Kind) const {
447 17492 : if (!isValid() || Kind == DINameKind::None)
448 : return nullptr;
449 : // Try to get mangled name only if it was asked for.
450 8746 : if (Kind == DINameKind::LinkageName) {
451 380 : if (auto Name = dwarf::toString(
452 12696 : findRecursively({DW_AT_MIPS_linkage_name, DW_AT_linkage_name}),
453 : nullptr))
454 : return Name;
455 : }
456 25098 : if (auto Name = dwarf::toString(findRecursively(DW_AT_name), nullptr))
457 6440 : return Name;
458 : return nullptr;
459 : }
460 :
461 747 : uint64_t DWARFDie::getDeclLine() const {
462 1494 : return toUnsigned(findRecursively(DW_AT_decl_line), 0);
463 : }
464 :
465 55 : void DWARFDie::getCallerFrame(uint32_t &CallFile, uint32_t &CallLine,
466 : uint32_t &CallColumn,
467 : uint32_t &CallDiscriminator) const {
468 55 : CallFile = toUnsigned(find(DW_AT_call_file), 0);
469 55 : CallLine = toUnsigned(find(DW_AT_call_line), 0);
470 55 : CallColumn = toUnsigned(find(DW_AT_call_column), 0);
471 55 : CallDiscriminator = toUnsigned(find(DW_AT_GNU_discriminator), 0);
472 55 : }
473 :
474 : /// Helper to dump a DIE with all of its parents, but no siblings.
475 14 : static unsigned dumpParentChain(DWARFDie Die, raw_ostream &OS, unsigned Indent,
476 : DIDumpOptions DumpOpts) {
477 : if (!Die)
478 : return Indent;
479 9 : Indent = dumpParentChain(Die.getParent(), OS, Indent, DumpOpts);
480 9 : Die.dump(OS, Indent, DumpOpts);
481 9 : return Indent + 2;
482 : }
483 :
484 8057 : void DWARFDie::dump(raw_ostream &OS, unsigned Indent,
485 : DIDumpOptions DumpOpts) const {
486 8057 : if (!isValid())
487 1 : return;
488 8056 : DWARFDataExtractor debug_info_data = U->getDebugInfoExtractor();
489 8056 : const uint32_t Offset = getOffset();
490 8056 : uint32_t offset = Offset;
491 8056 : if (DumpOpts.ShowParents) {
492 5 : DIDumpOptions ParentDumpOpts = DumpOpts;
493 5 : ParentDumpOpts.ShowParents = false;
494 5 : ParentDumpOpts.ShowChildren = false;
495 5 : Indent = dumpParentChain(getParent(), OS, Indent, ParentDumpOpts);
496 : }
497 :
498 16112 : if (debug_info_data.isValidOffset(offset)) {
499 8056 : uint32_t abbrCode = debug_info_data.getULEB128(&offset);
500 8056 : if (DumpOpts.ShowAddresses)
501 16058 : WithColor(OS, HighlightColor::Address).get()
502 8029 : << format("\n0x%8.8x: ", Offset);
503 :
504 8056 : if (abbrCode) {
505 6141 : auto AbbrevDecl = getAbbreviationDeclarationPtr();
506 6141 : if (AbbrevDecl) {
507 6141 : WithColor(OS, HighlightColor::Tag).get().indent(Indent)
508 12282 : << formatv("{0}", getTag());
509 6141 : if (DumpOpts.Verbose)
510 4131 : OS << format(" [%u] %c", abbrCode,
511 6910 : AbbrevDecl->hasChildren() ? '*' : ' ');
512 : OS << '\n';
513 :
514 : // Dump all data in the DIE for the attributes.
515 34030 : for (const auto &AttrSpec : AbbrevDecl->attributes()) {
516 27889 : if (AttrSpec.Form == DW_FORM_implicit_const) {
517 : // We are dumping .debug_info section ,
518 : // implicit_const attribute values are not really stored here,
519 : // but in .debug_abbrev section. So we just skip such attrs.
520 : continue;
521 : }
522 27889 : dumpAttribute(OS, *this, &offset, AttrSpec.Attr, AttrSpec.Form,
523 : Indent, DumpOpts);
524 : }
525 :
526 6141 : DWARFDie child = getFirstChild();
527 6141 : if (DumpOpts.ShowChildren && DumpOpts.RecurseDepth > 0 && child) {
528 1915 : DumpOpts.RecurseDepth--;
529 1915 : DIDumpOptions ChildDumpOpts = DumpOpts;
530 1915 : ChildDumpOpts.ShowParents = false;
531 7113 : while (child) {
532 7113 : child.dump(OS, Indent + 2, ChildDumpOpts);
533 7113 : child = child.getSibling();
534 : }
535 : }
536 : } else {
537 0 : OS << "Abbreviation code not found in 'debug_abbrev' class for code: "
538 : << abbrCode << '\n';
539 : }
540 : } else {
541 1915 : OS.indent(Indent) << "NULL\n";
542 : }
543 : }
544 : }
545 :
546 0 : LLVM_DUMP_METHOD void DWARFDie::dump() const { dump(llvm::errs(), 0); }
547 :
548 89 : DWARFDie DWARFDie::getParent() const {
549 89 : if (isValid())
550 88 : return U->getParent(Die);
551 1 : return DWARFDie();
552 : }
553 :
554 33487 : DWARFDie DWARFDie::getSibling() const {
555 33487 : if (isValid())
556 33486 : return U->getSibling(Die);
557 1 : return DWARFDie();
558 : }
559 :
560 3131 : DWARFDie DWARFDie::getPreviousSibling() const {
561 3131 : if (isValid())
562 3131 : return U->getPreviousSibling(Die);
563 0 : return DWARFDie();
564 : }
565 :
566 32940 : DWARFDie DWARFDie::getFirstChild() const {
567 32940 : if (isValid())
568 32938 : return U->getFirstChild(Die);
569 2 : return DWARFDie();
570 : }
571 :
572 4658 : DWARFDie DWARFDie::getLastChild() const {
573 4658 : if (isValid())
574 4657 : return U->getLastChild(Die);
575 1 : return DWARFDie();
576 : }
577 :
578 526 : iterator_range<DWARFDie::attribute_iterator> DWARFDie::attributes() const {
579 : return make_range(attribute_iterator(*this, false),
580 526 : attribute_iterator(*this, true));
581 : }
582 :
583 1052 : DWARFDie::attribute_iterator::attribute_iterator(DWARFDie D, bool End)
584 1052 : : Die(D), AttrValue(0), Index(0) {
585 1052 : auto AbbrDecl = Die.getAbbreviationDeclarationPtr();
586 : assert(AbbrDecl && "Must have abbreviation declaration");
587 1052 : if (End) {
588 : // This is the end iterator so we set the index to the attribute count.
589 526 : Index = AbbrDecl->getNumAttributes();
590 : } else {
591 : // This is the begin iterator so we extract the value for this->Index.
592 526 : AttrValue.Offset = D.getOffset() + AbbrDecl->getCodeByteSize();
593 526 : updateForIndex(*AbbrDecl, 0);
594 : }
595 1052 : }
596 :
597 2942 : void DWARFDie::attribute_iterator::updateForIndex(
598 : const DWARFAbbreviationDeclaration &AbbrDecl, uint32_t I) {
599 2942 : Index = I;
600 : // AbbrDecl must be valid before calling this function.
601 : auto NumAttrs = AbbrDecl.getNumAttributes();
602 2942 : if (Index < NumAttrs) {
603 2416 : AttrValue.Attr = AbbrDecl.getAttrByIndex(Index);
604 : // Add the previous byte size of any previous attribute value.
605 2416 : AttrValue.Offset += AttrValue.ByteSize;
606 : AttrValue.Value.setForm(AbbrDecl.getFormByIndex(Index));
607 2416 : uint32_t ParseOffset = AttrValue.Offset;
608 2416 : auto U = Die.getDwarfUnit();
609 : assert(U && "Die must have valid DWARF unit");
610 2416 : bool b = AttrValue.Value.extractValue(U->getDebugInfoExtractor(),
611 : &ParseOffset, U->getFormParams(), U);
612 : (void)b;
613 : assert(b && "extractValue cannot fail on fully parsed DWARF");
614 2416 : AttrValue.ByteSize = ParseOffset - AttrValue.Offset;
615 : } else {
616 : assert(Index == NumAttrs && "Indexes should be [0, NumAttrs) only");
617 : AttrValue.clear();
618 : }
619 2942 : }
620 :
621 2416 : DWARFDie::attribute_iterator &DWARFDie::attribute_iterator::operator++() {
622 4832 : if (auto AbbrDecl = Die.getAbbreviationDeclarationPtr())
623 2416 : updateForIndex(*AbbrDecl, Index + 1);
624 2416 : return *this;
625 : }
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