1//===-- DWARFUnit.cpp -----------------------------------------------------===//
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#include "DWARFUnit.h"
10
11#include "lldb/Core/Module.h"
12#include "lldb/Symbol/ObjectFile.h"
13#include "lldb/Utility/LLDBAssert.h"
14#include "lldb/Utility/StreamString.h"
15#include "lldb/Utility/Timer.h"
16#include "llvm/DebugInfo/DWARF/DWARFAddressRange.h"
17#include "llvm/DebugInfo/DWARF/DWARFDebugAbbrev.h"
18#include "llvm/DebugInfo/DWARF/DWARFDebugLoc.h"
19#include "llvm/DebugInfo/DWARF/DWARFDebugRangeList.h"
20#include "llvm/Object/Error.h"
21
22#include "DWARFCompileUnit.h"
23#include "DWARFDebugAranges.h"
24#include "DWARFDebugInfo.h"
25#include "DWARFTypeUnit.h"
26#include "LogChannelDWARF.h"
27#include "SymbolFileDWARFDwo.h"
28#include <optional>
29
30using namespace lldb;
31using namespace lldb_private;
32using namespace lldb_private::dwarf;
33using namespace lldb_private::plugin::dwarf;
34
35extern int g_verbose;
36
37DWARFUnit::DWARFUnit(SymbolFileDWARF &dwarf, lldb::user_id_t uid,
38 const llvm::DWARFUnitHeader &header,
39 const llvm::DWARFAbbreviationDeclarationSet &abbrevs,
40 DIERef::Section section, bool is_dwo)
41 : UserID(uid), m_dwarf(dwarf), m_header(header), m_abbrevs(&abbrevs),
42 m_cancel_scopes(false), m_section(section), m_is_dwo(is_dwo),
43 m_has_parsed_non_skeleton_unit(false), m_dwo_id(header.getDWOId()) {}
44
45DWARFUnit::~DWARFUnit() = default;
46
47// Parses first DIE of a compile unit, excluding DWO.
48void DWARFUnit::ExtractUnitDIENoDwoIfNeeded() {
49 {
50 llvm::sys::ScopedReader lock(m_first_die_mutex);
51 if (m_first_die)
52 return; // Already parsed
53 }
54 llvm::sys::ScopedWriter lock(m_first_die_mutex);
55 if (m_first_die)
56 return; // Already parsed
57
58 ElapsedTime elapsed(m_dwarf.GetDebugInfoParseTimeRef());
59
60 // Set the offset to that of the first DIE and calculate the start of the
61 // next compilation unit header.
62 lldb::offset_t offset = GetFirstDIEOffset();
63
64 // We are in our compile unit, parse starting at the offset we were told to
65 // parse
66 const DWARFDataExtractor &data = GetData();
67 if (offset < GetNextUnitOffset() &&
68 m_first_die.Extract(data, cu: *this, offset_ptr: &offset)) {
69 AddUnitDIE(cu_die: m_first_die);
70 return;
71 }
72}
73
74// Parses first DIE of a compile unit including DWO.
75void DWARFUnit::ExtractUnitDIEIfNeeded() {
76 ExtractUnitDIENoDwoIfNeeded();
77
78 if (m_has_parsed_non_skeleton_unit)
79 return;
80
81 m_has_parsed_non_skeleton_unit = true;
82 m_dwo_error.Clear();
83
84 if (!m_dwo_id)
85 return; // No DWO file.
86
87 std::shared_ptr<SymbolFileDWARFDwo> dwo_symbol_file =
88 m_dwarf.GetDwoSymbolFileForCompileUnit(dwarf_cu&: *this, cu_die: m_first_die);
89 if (!dwo_symbol_file)
90 return;
91
92 DWARFUnit *dwo_cu = dwo_symbol_file->GetDWOCompileUnitForHash(hash: *m_dwo_id);
93
94 if (!dwo_cu) {
95 SetDwoError(Status::FromErrorStringWithFormatv(
96 format: "unable to load .dwo file from \"{0}\" due to ID ({1:x16}) mismatch "
97 "for skeleton DIE at {2:x8}",
98 args: dwo_symbol_file->GetObjectFile()->GetFileSpec().GetPath(), args&: *m_dwo_id,
99 args: m_first_die.GetOffset()));
100 return; // Can't fetch the compile unit from the dwo file.
101 }
102
103 // Link the DWO unit to this object, if it hasn't been linked already (this
104 // can happen when we have an index, and the DWO unit is parsed first).
105 if (!dwo_cu->LinkToSkeletonUnit(skeleton_unit&: *this)) {
106 SetDwoError(Status::FromErrorStringWithFormatv(
107 format: "multiple compile units with Dwo ID {0:x16}", args&: *m_dwo_id));
108 return;
109 }
110
111 DWARFBaseDIE dwo_cu_die = dwo_cu->GetUnitDIEOnly();
112 if (!dwo_cu_die.IsValid()) {
113 // Can't fetch the compile unit DIE from the dwo file.
114 SetDwoError(Status::FromErrorStringWithFormatv(
115 format: "unable to extract compile unit DIE from .dwo file for skeleton "
116 "DIE at {0:x16}",
117 args: m_first_die.GetOffset()));
118 return;
119 }
120
121 // Here for DWO CU we want to use the address base set in the skeleton unit
122 // (DW_AT_addr_base) if it is available and use the DW_AT_GNU_addr_base
123 // otherwise. We do that because pre-DWARF v5 could use the DW_AT_GNU_*
124 // attributes which were applicable to the DWO units. The corresponding
125 // DW_AT_* attributes standardized in DWARF v5 are also applicable to the
126 // main unit in contrast.
127 if (m_addr_base)
128 dwo_cu->SetAddrBase(*m_addr_base);
129 else if (m_gnu_addr_base)
130 dwo_cu->SetAddrBase(*m_gnu_addr_base);
131
132 if (GetVersion() <= 4 && m_gnu_ranges_base)
133 dwo_cu->SetRangesBase(*m_gnu_ranges_base);
134 else if (dwo_symbol_file->GetDWARFContext()
135 .getOrLoadRngListsData()
136 .GetByteSize() > 0)
137 dwo_cu->SetRangesBase(llvm::DWARFListTableHeader::getHeaderSize(Format: DWARF32));
138
139 if (GetVersion() >= 5 &&
140 dwo_symbol_file->GetDWARFContext().getOrLoadLocListsData().GetByteSize() >
141 0)
142 dwo_cu->SetLoclistsBase(llvm::DWARFListTableHeader::getHeaderSize(Format: DWARF32));
143
144 dwo_cu->SetBaseAddress(GetBaseAddress());
145
146 m_dwo = std::shared_ptr<DWARFUnit>(std::move(dwo_symbol_file), dwo_cu);
147}
148
149// Parses a compile unit and indexes its DIEs if it hasn't already been done.
150// It will leave this compile unit extracted forever.
151void DWARFUnit::ExtractDIEsIfNeeded() {
152 m_cancel_scopes = true;
153
154 {
155 llvm::sys::ScopedReader lock(m_die_array_mutex);
156 if (!m_die_array.empty())
157 return; // Already parsed
158 }
159 llvm::sys::ScopedWriter lock(m_die_array_mutex);
160 if (!m_die_array.empty())
161 return; // Already parsed
162
163 ExtractDIEsRWLocked();
164}
165
166// Parses a compile unit and indexes its DIEs if it hasn't already been done.
167// It will clear this compile unit after returned instance gets out of scope,
168// no other ScopedExtractDIEs instance is running for this compile unit
169// and no ExtractDIEsIfNeeded() has been executed during this ScopedExtractDIEs
170// lifetime.
171DWARFUnit::ScopedExtractDIEs DWARFUnit::ExtractDIEsScoped() {
172 ScopedExtractDIEs scoped(*this);
173
174 {
175 llvm::sys::ScopedReader lock(m_die_array_mutex);
176 if (!m_die_array.empty())
177 return scoped; // Already parsed
178 }
179 llvm::sys::ScopedWriter lock(m_die_array_mutex);
180 if (!m_die_array.empty())
181 return scoped; // Already parsed
182
183 // Otherwise m_die_array would be already populated.
184 lldbassert(!m_cancel_scopes);
185
186 ExtractDIEsRWLocked();
187 scoped.m_clear_dies = true;
188 return scoped;
189}
190
191DWARFUnit::ScopedExtractDIEs::ScopedExtractDIEs(DWARFUnit &cu) : m_cu(&cu) {
192 llvm::sys::ScopedLock lock(m_cu->m_die_array_scoped_mutex);
193 ++m_cu->m_die_array_scoped_count;
194}
195
196DWARFUnit::ScopedExtractDIEs::~ScopedExtractDIEs() {
197 if (!m_cu)
198 return;
199 llvm::sys::ScopedLock lock(m_cu->m_die_array_scoped_mutex);
200 --m_cu->m_die_array_scoped_count;
201 if (m_cu->m_die_array_scoped_count == 0 && m_clear_dies &&
202 !m_cu->m_cancel_scopes) {
203 llvm::sys::ScopedWriter lock(m_cu->m_die_array_mutex);
204 m_cu->ClearDIEsRWLocked();
205 }
206}
207
208DWARFUnit::ScopedExtractDIEs::ScopedExtractDIEs(ScopedExtractDIEs &&rhs)
209 : m_cu(rhs.m_cu), m_clear_dies(rhs.m_clear_dies) {
210 rhs.m_cu = nullptr;
211}
212
213DWARFUnit::ScopedExtractDIEs &
214DWARFUnit::ScopedExtractDIEs::operator=(DWARFUnit::ScopedExtractDIEs &&rhs) {
215 m_cu = rhs.m_cu;
216 rhs.m_cu = nullptr;
217 m_clear_dies = rhs.m_clear_dies;
218 return *this;
219}
220
221// Parses a compile unit and indexes its DIEs, m_die_array_mutex must be
222// held R/W and m_die_array must be empty.
223void DWARFUnit::ExtractDIEsRWLocked() {
224 llvm::sys::ScopedWriter first_die_lock(m_first_die_mutex);
225
226 ElapsedTime elapsed(m_dwarf.GetDebugInfoParseTimeRef());
227 LLDB_SCOPED_TIMERF(
228 "%s",
229 llvm::formatv("{0:x16}: DWARFUnit::ExtractDIEsIfNeeded()", GetOffset())
230 .str()
231 .c_str());
232
233 // Set the offset to that of the first DIE and calculate the start of the
234 // next compilation unit header.
235 lldb::offset_t offset = GetFirstDIEOffset();
236 lldb::offset_t next_cu_offset = GetNextUnitOffset();
237
238 DWARFDebugInfoEntry die;
239
240 uint32_t depth = 0;
241 // We are in our compile unit, parse starting at the offset we were told to
242 // parse
243 const DWARFDataExtractor &data = GetData();
244 std::vector<uint32_t> die_index_stack;
245 die_index_stack.reserve(n: 32);
246 die_index_stack.push_back(x: 0);
247 bool prev_die_had_children = false;
248 while (offset < next_cu_offset && die.Extract(data, cu: *this, offset_ptr: &offset)) {
249 const bool null_die = die.IsNULL();
250 if (depth == 0) {
251 assert(m_die_array.empty() && "Compile unit DIE already added");
252
253 // The average bytes per DIE entry has been seen to be around 14-20 so
254 // lets pre-reserve half of that since we are now stripping the NULL
255 // tags.
256
257 // Only reserve the memory if we are adding children of the main
258 // compile unit DIE. The compile unit DIE is always the first entry, so
259 // if our size is 1, then we are adding the first compile unit child
260 // DIE and should reserve the memory.
261 m_die_array.reserve(n: GetDebugInfoSize() / 24);
262 m_die_array.push_back(x: die);
263
264 if (!m_first_die)
265 AddUnitDIE(cu_die: m_die_array.front());
266
267 // With -fsplit-dwarf-inlining, clang will emit non-empty skeleton compile
268 // units. We are not able to access these DIE *and* the dwo file
269 // simultaneously. We also don't need to do that as the dwo file will
270 // contain a superset of information. So, we don't even attempt to parse
271 // any remaining DIEs.
272 if (m_dwo) {
273 m_die_array.front().SetHasChildren(false);
274 break;
275 }
276
277 } else {
278 if (null_die) {
279 if (prev_die_had_children) {
280 // This will only happen if a DIE says is has children but all it
281 // contains is a NULL tag. Since we are removing the NULL DIEs from
282 // the list (saves up to 25% in C++ code), we need a way to let the
283 // DIE know that it actually doesn't have children.
284 if (!m_die_array.empty())
285 m_die_array.back().SetHasChildren(false);
286 }
287 } else {
288 die.SetParentIndex(m_die_array.size() - die_index_stack[depth - 1]);
289
290 if (die_index_stack.back())
291 m_die_array[die_index_stack.back()].SetSiblingIndex(
292 m_die_array.size() - die_index_stack.back());
293
294 // Only push the DIE if it isn't a NULL DIE
295 m_die_array.push_back(x: die);
296 }
297 }
298
299 if (null_die) {
300 // NULL DIE.
301 if (!die_index_stack.empty())
302 die_index_stack.pop_back();
303
304 if (depth > 0)
305 --depth;
306 prev_die_had_children = false;
307 } else {
308 die_index_stack.back() = m_die_array.size() - 1;
309 // Normal DIE
310 const bool die_has_children = die.HasChildren();
311 if (die_has_children) {
312 die_index_stack.push_back(x: 0);
313 ++depth;
314 }
315 prev_die_had_children = die_has_children;
316 }
317
318 if (depth == 0)
319 break; // We are done with this compile unit!
320 }
321
322 if (!m_die_array.empty()) {
323 // The last die cannot have children (if it did, it wouldn't be the last
324 // one). This only makes a difference for malformed dwarf that does not have
325 // a terminating null die.
326 m_die_array.back().SetHasChildren(false);
327
328 if (m_first_die) {
329 // Only needed for the assertion.
330 m_first_die.SetHasChildren(m_die_array.front().HasChildren());
331 lldbassert(m_first_die == m_die_array.front());
332 }
333 m_first_die = m_die_array.front();
334 }
335
336 m_die_array.shrink_to_fit();
337
338 if (m_dwo)
339 m_dwo->ExtractDIEsIfNeeded();
340}
341
342// This is used when a split dwarf is enabled.
343// A skeleton compilation unit may contain the DW_AT_str_offsets_base attribute
344// that points to the first string offset of the CU contribution to the
345// .debug_str_offsets. At the same time, the corresponding split debug unit also
346// may use DW_FORM_strx* forms pointing to its own .debug_str_offsets.dwo and
347// for that case, we should find the offset (skip the section header).
348void DWARFUnit::SetDwoStrOffsetsBase() {
349 lldb::offset_t baseOffset = 0;
350
351 if (const llvm::DWARFUnitIndex::Entry *entry = m_header.getIndexEntry()) {
352 if (const auto *contribution =
353 entry->getContribution(Sec: llvm::DW_SECT_STR_OFFSETS))
354 baseOffset = contribution->getOffset();
355 else
356 return;
357 }
358
359 if (GetVersion() >= 5) {
360 const DWARFDataExtractor &strOffsets =
361 GetSymbolFileDWARF().GetDWARFContext().getOrLoadStrOffsetsData();
362 uint64_t length = strOffsets.GetU32(offset_ptr: &baseOffset);
363 if (length == 0xffffffff)
364 length = strOffsets.GetU64(offset_ptr: &baseOffset);
365
366 // Check version.
367 if (strOffsets.GetU16(offset_ptr: &baseOffset) < 5)
368 return;
369
370 // Skip padding.
371 baseOffset += 2;
372 }
373
374 SetStrOffsetsBase(baseOffset);
375}
376
377std::optional<uint64_t> DWARFUnit::GetDWOId() {
378 ExtractUnitDIENoDwoIfNeeded();
379 return m_dwo_id;
380}
381
382// m_die_array_mutex must be already held as read/write.
383void DWARFUnit::AddUnitDIE(const DWARFDebugInfoEntry &cu_die) {
384 DWARFAttributes attributes = cu_die.GetAttributes(cu: this);
385
386 // Extract DW_AT_addr_base first, as other attributes may need it.
387 for (size_t i = 0; i < attributes.Size(); ++i) {
388 if (attributes.AttributeAtIndex(i) != DW_AT_addr_base)
389 continue;
390 DWARFFormValue form_value;
391 if (attributes.ExtractFormValueAtIndex(i, form_value)) {
392 SetAddrBase(form_value.Unsigned());
393 break;
394 }
395 }
396
397 for (size_t i = 0; i < attributes.Size(); ++i) {
398 dw_attr_t attr = attributes.AttributeAtIndex(i);
399 DWARFFormValue form_value;
400 if (!attributes.ExtractFormValueAtIndex(i, form_value))
401 continue;
402 switch (attr) {
403 default:
404 break;
405 case DW_AT_loclists_base:
406 SetLoclistsBase(form_value.Unsigned());
407 break;
408 case DW_AT_rnglists_base:
409 SetRangesBase(form_value.Unsigned());
410 break;
411 case DW_AT_str_offsets_base:
412 SetStrOffsetsBase(form_value.Unsigned());
413 break;
414 case DW_AT_low_pc:
415 SetBaseAddress(form_value.Address());
416 break;
417 case DW_AT_entry_pc:
418 // If the value was already set by DW_AT_low_pc, don't update it.
419 if (m_base_addr == LLDB_INVALID_ADDRESS)
420 SetBaseAddress(form_value.Address());
421 break;
422 case DW_AT_stmt_list:
423 m_line_table_offset = form_value.Unsigned();
424 break;
425 case DW_AT_GNU_addr_base:
426 m_gnu_addr_base = form_value.Unsigned();
427 break;
428 case DW_AT_GNU_ranges_base:
429 m_gnu_ranges_base = form_value.Unsigned();
430 break;
431 case DW_AT_GNU_dwo_id:
432 m_dwo_id = form_value.Unsigned();
433 break;
434 }
435 }
436
437 if (m_is_dwo) {
438 m_has_parsed_non_skeleton_unit = true;
439 SetDwoStrOffsetsBase();
440 return;
441 }
442}
443
444size_t DWARFUnit::GetDebugInfoSize() const {
445 return GetLengthByteSize() + GetLength() - GetHeaderByteSize();
446}
447
448const llvm::DWARFAbbreviationDeclarationSet *
449DWARFUnit::GetAbbreviations() const {
450 return m_abbrevs;
451}
452
453dw_offset_t DWARFUnit::GetAbbrevOffset() const {
454 return m_abbrevs ? m_abbrevs->getOffset() : DW_INVALID_OFFSET;
455}
456
457dw_offset_t DWARFUnit::GetLineTableOffset() {
458 ExtractUnitDIENoDwoIfNeeded();
459 return m_line_table_offset;
460}
461
462void DWARFUnit::SetAddrBase(dw_addr_t addr_base) { m_addr_base = addr_base; }
463
464// Parse the rangelist table header, including the optional array of offsets
465// following it (DWARF v5 and later).
466template <typename ListTableType>
467static llvm::Expected<ListTableType>
468ParseListTableHeader(const llvm::DWARFDataExtractor &data, uint64_t offset,
469 DwarfFormat format) {
470 // We are expected to be called with Offset 0 or pointing just past the table
471 // header. Correct Offset in the latter case so that it points to the start
472 // of the header.
473 if (offset == 0) {
474 // This means DW_AT_rnglists_base is missing and therefore DW_FORM_rnglistx
475 // cannot be handled. Returning a default-constructed ListTableType allows
476 // DW_FORM_sec_offset to be supported.
477 return ListTableType();
478 }
479
480 uint64_t HeaderSize = llvm::DWARFListTableHeader::getHeaderSize(Format: format);
481 if (offset < HeaderSize)
482 return llvm::createStringError(EC: std::errc::invalid_argument,
483 Fmt: "did not detect a valid"
484 " list table with base = 0x%" PRIx64 "\n",
485 Vals: offset);
486 offset -= HeaderSize;
487 ListTableType Table;
488 if (llvm::Error E = Table.extractHeaderAndOffsets(data, &offset))
489 return std::move(E);
490 return Table;
491}
492
493void DWARFUnit::SetLoclistsBase(dw_addr_t loclists_base) {
494 uint64_t offset = 0;
495 if (const llvm::DWARFUnitIndex::Entry *entry = m_header.getIndexEntry()) {
496 const auto *contribution = entry->getContribution(Sec: llvm::DW_SECT_LOCLISTS);
497 if (!contribution) {
498 GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError(
499 format: "Failed to find location list contribution for CU with DWO Id "
500 "{0:x16}",
501 args: *GetDWOId());
502 return;
503 }
504 offset += contribution->getOffset();
505 }
506 m_loclists_base = loclists_base;
507
508 uint64_t header_size = llvm::DWARFListTableHeader::getHeaderSize(Format: DWARF32);
509 if (loclists_base < header_size)
510 return;
511
512 m_loclist_table_header.emplace(args: ".debug_loclists", args: "locations");
513 offset += loclists_base - header_size;
514 if (llvm::Error E = m_loclist_table_header->extract(
515 Data: m_dwarf.GetDWARFContext().getOrLoadLocListsData().GetAsLLVMDWARF(),
516 OffsetPtr: &offset)) {
517 GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError(
518 format: "Failed to extract location list table at offset {0:x16} (location "
519 "list base: {1:x16}): {2}",
520 args&: offset, args&: loclists_base, args: toString(E: std::move(E)).c_str());
521 }
522}
523
524std::unique_ptr<llvm::DWARFLocationTable>
525DWARFUnit::GetLocationTable(const DataExtractor &data) const {
526 llvm::DWARFDataExtractor llvm_data(
527 data.GetData(), data.GetByteOrder() == lldb::eByteOrderLittle,
528 data.GetAddressByteSize());
529
530 if (m_is_dwo || GetVersion() >= 5)
531 return std::make_unique<llvm::DWARFDebugLoclists>(args&: llvm_data, args: GetVersion());
532 return std::make_unique<llvm::DWARFDebugLoc>(args&: llvm_data);
533}
534
535DWARFDataExtractor DWARFUnit::GetLocationData() const {
536 DWARFContext &Ctx = GetSymbolFileDWARF().GetDWARFContext();
537 const DWARFDataExtractor &data =
538 GetVersion() >= 5 ? Ctx.getOrLoadLocListsData() : Ctx.getOrLoadLocData();
539 if (const llvm::DWARFUnitIndex::Entry *entry = m_header.getIndexEntry()) {
540 if (const auto *contribution = entry->getContribution(
541 Sec: GetVersion() >= 5 ? llvm::DW_SECT_LOCLISTS : llvm::DW_SECT_EXT_LOC))
542 return DWARFDataExtractor(data, contribution->getOffset(),
543 contribution->getLength32());
544 return DWARFDataExtractor();
545 }
546 return data;
547}
548
549DWARFDataExtractor DWARFUnit::GetRnglistData() const {
550 DWARFContext &Ctx = GetSymbolFileDWARF().GetDWARFContext();
551 const DWARFDataExtractor &data = Ctx.getOrLoadRngListsData();
552 if (const llvm::DWARFUnitIndex::Entry *entry = m_header.getIndexEntry()) {
553 if (const auto *contribution =
554 entry->getContribution(Sec: llvm::DW_SECT_RNGLISTS))
555 return DWARFDataExtractor(data, contribution->getOffset(),
556 contribution->getLength32());
557 GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError(
558 format: "Failed to find range list contribution for CU with signature {0:x16}",
559 args: entry->getSignature());
560
561 return DWARFDataExtractor();
562 }
563 return data;
564}
565
566void DWARFUnit::SetRangesBase(dw_addr_t ranges_base) {
567 lldbassert(!m_rnglist_table_done);
568
569 m_ranges_base = ranges_base;
570}
571
572const std::optional<llvm::DWARFDebugRnglistTable> &
573DWARFUnit::GetRnglistTable() {
574 if (GetVersion() >= 5 && !m_rnglist_table_done) {
575 m_rnglist_table_done = true;
576 if (auto table_or_error =
577 ParseListTableHeader<llvm::DWARFDebugRnglistTable>(
578 data: GetRnglistData().GetAsLLVMDWARF(), offset: m_ranges_base, format: DWARF32))
579 m_rnglist_table = std::move(table_or_error.get());
580 else
581 GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError(
582 format: "Failed to extract range list table at offset {0:x16}: {1}",
583 args&: m_ranges_base, args: toString(E: table_or_error.takeError()).c_str());
584 }
585 return m_rnglist_table;
586}
587
588// This function is called only for DW_FORM_rnglistx.
589llvm::Expected<uint64_t> DWARFUnit::GetRnglistOffset(uint32_t Index) {
590 if (!GetRnglistTable())
591 return llvm::createStringError(EC: std::errc::invalid_argument,
592 Fmt: "missing or invalid range list table");
593 if (!m_ranges_base)
594 return llvm::createStringError(
595 EC: std::errc::invalid_argument,
596 Fmt: llvm::formatv(Fmt: "DW_FORM_rnglistx cannot be used without "
597 "DW_AT_rnglists_base for CU at {0:x16}",
598 Vals: GetOffset())
599 .str()
600 .c_str());
601 if (std::optional<uint64_t> off = GetRnglistTable()->getOffsetEntry(
602 Data: GetRnglistData().GetAsLLVM(), Index))
603 return *off + m_ranges_base;
604 return llvm::createStringError(
605 EC: std::errc::invalid_argument,
606 Fmt: "invalid range list table index %u; OffsetEntryCount is %u, "
607 "DW_AT_rnglists_base is %" PRIu64,
608 Vals: Index, Vals: GetRnglistTable()->getOffsetEntryCount(), Vals: m_ranges_base);
609}
610
611void DWARFUnit::SetStrOffsetsBase(dw_offset_t str_offsets_base) {
612 m_str_offsets_base = str_offsets_base;
613}
614
615dw_addr_t DWARFUnit::ReadAddressFromDebugAddrSection(uint32_t index) const {
616 uint32_t index_size = GetAddressByteSize();
617 dw_offset_t addr_base = GetAddrBase();
618 dw_addr_t offset = addr_base + static_cast<dw_addr_t>(index) * index_size;
619 const DWARFDataExtractor &data =
620 m_dwarf.GetDWARFContext().getOrLoadAddrData();
621 if (data.ValidOffsetForDataOfSize(offset, length: index_size))
622 return data.GetMaxU64_unchecked(offset_ptr: &offset, byte_size: index_size);
623 return LLDB_INVALID_ADDRESS;
624}
625
626// It may be called only with m_die_array_mutex held R/W.
627void DWARFUnit::ClearDIEsRWLocked() {
628 m_die_array.clear();
629 m_die_array.shrink_to_fit();
630
631 if (m_dwo && !m_dwo->m_cancel_scopes)
632 m_dwo->ClearDIEsRWLocked();
633}
634
635lldb::ByteOrder DWARFUnit::GetByteOrder() const {
636 return m_dwarf.GetObjectFile()->GetByteOrder();
637}
638
639void DWARFUnit::SetBaseAddress(dw_addr_t base_addr) { m_base_addr = base_addr; }
640
641// Compare function DWARFDebugAranges::Range structures
642static bool CompareDIEOffset(const DWARFDebugInfoEntry &die,
643 const dw_offset_t die_offset) {
644 return die.GetOffset() < die_offset;
645}
646
647// GetDIE()
648//
649// Get the DIE (Debug Information Entry) with the specified offset by first
650// checking if the DIE is contained within this compile unit and grabbing the
651// DIE from this compile unit. Otherwise we grab the DIE from the DWARF file.
652DWARFDIE
653DWARFUnit::GetDIE(dw_offset_t die_offset) {
654 if (die_offset == DW_INVALID_OFFSET)
655 return DWARFDIE(); // Not found
656
657 if (!ContainsDIEOffset(die_offset)) {
658 GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError(
659 format: "GetDIE for DIE {0:x16} is outside of its CU {1:x16}", args&: die_offset,
660 args: GetOffset());
661 return DWARFDIE(); // Not found
662 }
663
664 ExtractDIEsIfNeeded();
665 DWARFDebugInfoEntry::const_iterator end = m_die_array.cend();
666 DWARFDebugInfoEntry::const_iterator pos =
667 lower_bound(first: m_die_array.cbegin(), last: end, val: die_offset, comp: CompareDIEOffset);
668
669 if (pos != end && die_offset == (*pos).GetOffset())
670 return DWARFDIE(this, &(*pos));
671 return DWARFDIE(); // Not found
672}
673
674llvm::StringRef DWARFUnit::PeekDIEName(dw_offset_t die_offset) {
675 DWARFDebugInfoEntry die;
676 if (!die.Extract(data: GetData(), cu: *this, offset_ptr: &die_offset))
677 return llvm::StringRef();
678
679 // Does die contain a DW_AT_Name?
680 if (const char *name =
681 die.GetAttributeValueAsString(cu: this, attr: DW_AT_name, fail_value: nullptr))
682 return name;
683
684 // Does its DW_AT_specification or DW_AT_abstract_origin contain an AT_Name?
685 for (auto attr : {DW_AT_specification, DW_AT_abstract_origin}) {
686 DWARFFormValue form_value;
687 if (!die.GetAttributeValue(cu: this, attr, formValue&: form_value))
688 continue;
689 auto [unit, offset] = form_value.ReferencedUnitAndOffset();
690 if (unit)
691 if (auto name = unit->PeekDIEName(die_offset: offset); !name.empty())
692 return name;
693 }
694
695 return llvm::StringRef();
696}
697
698llvm::Expected<std::pair<uint64_t, bool>>
699DWARFUnit::GetDIEBitSizeAndSign(uint64_t relative_die_offset) const {
700 // Retrieve the type DIE that the value is being converted to. This
701 // offset is compile unit relative so we need to fix it up.
702 const uint64_t abs_die_offset = relative_die_offset + GetOffset();
703 // FIXME: the constness has annoying ripple effects.
704 DWARFDIE die = const_cast<DWARFUnit *>(this)->GetDIE(die_offset: abs_die_offset);
705 if (!die)
706 return llvm::createStringError(Fmt: "cannot resolve DW_OP_convert type DIE");
707 uint64_t encoding =
708 die.GetAttributeValueAsUnsigned(attr: DW_AT_encoding, fail_value: DW_ATE_hi_user);
709 uint64_t bit_size = die.GetAttributeValueAsUnsigned(attr: DW_AT_byte_size, fail_value: 0) * 8;
710 if (!bit_size)
711 bit_size = die.GetAttributeValueAsUnsigned(attr: DW_AT_bit_size, fail_value: 0);
712 if (!bit_size)
713 return llvm::createStringError(Fmt: "unsupported type size");
714 bool sign;
715 switch (encoding) {
716 case DW_ATE_signed:
717 case DW_ATE_signed_char:
718 sign = true;
719 break;
720 case DW_ATE_unsigned:
721 case DW_ATE_unsigned_char:
722 sign = false;
723 break;
724 default:
725 return llvm::createStringError(Fmt: "unsupported encoding");
726 }
727 return std::pair{bit_size, sign};
728}
729
730lldb::offset_t
731DWARFUnit::GetVendorDWARFOpcodeSize(const DataExtractor &data,
732 const lldb::offset_t data_offset,
733 const uint8_t op) const {
734 return GetSymbolFileDWARF().GetVendorDWARFOpcodeSize(data, data_offset, op);
735}
736
737bool DWARFUnit::ParseVendorDWARFOpcode(uint8_t op, const DataExtractor &opcodes,
738 lldb::offset_t &offset,
739 std::vector<Value> &stack) const {
740 return GetSymbolFileDWARF().ParseVendorDWARFOpcode(op, opcodes, offset,
741 stack);
742}
743
744bool DWARFUnit::ParseDWARFLocationList(
745 const DataExtractor &data, DWARFExpressionList &location_list) const {
746 location_list.Clear();
747 std::unique_ptr<llvm::DWARFLocationTable> loctable_up =
748 GetLocationTable(data);
749 Log *log = GetLog(mask: DWARFLog::DebugInfo);
750 auto lookup_addr =
751 [&](uint32_t index) -> std::optional<llvm::object::SectionedAddress> {
752 addr_t address = ReadAddressFromDebugAddrSection(index);
753 if (address == LLDB_INVALID_ADDRESS)
754 return std::nullopt;
755 return llvm::object::SectionedAddress{.Address: address};
756 };
757 auto process_list = [&](llvm::Expected<llvm::DWARFLocationExpression> loc) {
758 if (!loc) {
759 LLDB_LOG_ERROR(log, loc.takeError(), "{0}");
760 return true;
761 }
762 auto buffer_sp =
763 std::make_shared<DataBufferHeap>(args: loc->Expr.data(), args: loc->Expr.size());
764 DWARFExpression expr = DWARFExpression(DataExtractor(
765 buffer_sp, data.GetByteOrder(), data.GetAddressByteSize()));
766 location_list.AddExpression(base: loc->Range->LowPC, end: loc->Range->HighPC, expr);
767 return true;
768 };
769 llvm::Error error = loctable_up->visitAbsoluteLocationList(
770 Offset: 0, BaseAddr: llvm::object::SectionedAddress{.Address: GetBaseAddress()}, LookupAddr: lookup_addr,
771 Callback: process_list);
772 location_list.Sort();
773 if (error) {
774 LLDB_LOG_ERROR(log, std::move(error), "{0}");
775 return false;
776 }
777 return true;
778}
779
780DWARFUnit &DWARFUnit::GetNonSkeletonUnit() {
781 ExtractUnitDIEIfNeeded();
782 if (m_dwo)
783 return *m_dwo;
784 return *this;
785}
786
787uint8_t DWARFUnit::GetAddressByteSize(const DWARFUnit *cu) {
788 if (cu)
789 return cu->GetAddressByteSize();
790 return DWARFUnit::GetDefaultAddressSize();
791}
792
793uint8_t DWARFUnit::GetDefaultAddressSize() { return 4; }
794
795DWARFCompileUnit *DWARFUnit::GetSkeletonUnit() {
796 if (m_skeleton_unit.load() == nullptr && IsDWOUnit()) {
797 SymbolFileDWARFDwo *dwo =
798 llvm::dyn_cast_or_null<SymbolFileDWARFDwo>(Val: &GetSymbolFileDWARF());
799 // Do a reverse lookup if the skeleton compile unit wasn't set.
800 DWARFUnit *candidate_skeleton_unit =
801 dwo ? dwo->GetBaseSymbolFile().GetSkeletonUnit(dwo_unit: this) : nullptr;
802 if (candidate_skeleton_unit)
803 (void)LinkToSkeletonUnit(skeleton_unit&: *candidate_skeleton_unit);
804 // Linking may fail due to a race, so be sure to return the actual value.
805 }
806 return llvm::dyn_cast_or_null<DWARFCompileUnit>(Val: m_skeleton_unit.load());
807}
808
809bool DWARFUnit::LinkToSkeletonUnit(DWARFUnit &skeleton_unit) {
810 DWARFUnit *expected_unit = nullptr;
811 if (m_skeleton_unit.compare_exchange_strong(p1&: expected_unit, p2: &skeleton_unit))
812 return true;
813 if (expected_unit == &skeleton_unit) {
814 // Exchange failed because it already contained the right value.
815 return true;
816 }
817 return false; // Already linked to a different unit.
818}
819
820bool DWARFUnit::Supports_unnamed_objc_bitfields() {
821 if (GetProducer() == eProducerClang)
822 return GetProducerVersion() >= llvm::VersionTuple(425, 0, 13);
823 // Assume all other compilers didn't have incorrect ObjC bitfield info.
824 return true;
825}
826
827void DWARFUnit::ParseProducerInfo() {
828 m_producer = eProducerOther;
829 const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
830 if (!die)
831 return;
832
833 llvm::StringRef producer(
834 die->GetAttributeValueAsString(cu: this, attr: DW_AT_producer, fail_value: nullptr));
835 if (producer.empty())
836 return;
837
838 static const RegularExpression g_swiftlang_version_regex(
839 llvm::StringRef(R"(swiftlang-([0-9]+\.[0-9]+\.[0-9]+(\.[0-9]+)?))"));
840 static const RegularExpression g_clang_version_regex(
841 llvm::StringRef(R"(clang-([0-9]+\.[0-9]+\.[0-9]+(\.[0-9]+)?))"));
842
843 llvm::SmallVector<llvm::StringRef, 3> matches;
844 if (g_swiftlang_version_regex.Execute(string: producer, matches: &matches)) {
845 m_producer_version.tryParse(string: matches[1]);
846 m_producer = eProducerSwift;
847 } else if (producer.contains(Other: "clang")) {
848 if (g_clang_version_regex.Execute(string: producer, matches: &matches))
849 m_producer_version.tryParse(string: matches[1]);
850 m_producer = eProducerClang;
851 } else if (producer.contains(Other: "GNU")) {
852 m_producer = eProducerGCC;
853 }
854}
855
856DWARFProducer DWARFUnit::GetProducer() {
857 if (m_producer == eProducerInvalid)
858 ParseProducerInfo();
859 return m_producer;
860}
861
862llvm::VersionTuple DWARFUnit::GetProducerVersion() {
863 if (m_producer_version.empty())
864 ParseProducerInfo();
865 return m_producer_version;
866}
867
868uint64_t DWARFUnit::GetDWARFLanguageType() {
869 if (m_language_type)
870 return *m_language_type;
871
872 const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
873 if (!die)
874 m_language_type = 0;
875 else
876 m_language_type = die->GetAttributeValueAsUnsigned(cu: this, attr: DW_AT_language, fail_value: 0);
877 return *m_language_type;
878}
879
880bool DWARFUnit::GetIsOptimized() {
881 if (m_is_optimized == eLazyBoolCalculate) {
882 const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
883 if (die) {
884 m_is_optimized = eLazyBoolNo;
885 if (die->GetAttributeValueAsUnsigned(cu: this, attr: DW_AT_APPLE_optimized, fail_value: 0) ==
886 1) {
887 m_is_optimized = eLazyBoolYes;
888 }
889 }
890 }
891 return m_is_optimized == eLazyBoolYes;
892}
893
894FileSpec::Style DWARFUnit::GetPathStyle() {
895 if (!m_comp_dir)
896 ComputeCompDirAndGuessPathStyle();
897 return m_comp_dir->GetPathStyle();
898}
899
900const FileSpec &DWARFUnit::GetCompilationDirectory() {
901 if (!m_comp_dir)
902 ComputeCompDirAndGuessPathStyle();
903 return *m_comp_dir;
904}
905
906const FileSpec &DWARFUnit::GetAbsolutePath() {
907 if (!m_file_spec)
908 ComputeAbsolutePath();
909 return *m_file_spec;
910}
911
912FileSpec DWARFUnit::GetFile(size_t file_idx) {
913 return m_dwarf.GetFile(unit&: *this, file_idx);
914}
915
916// DWARF2/3 suggests the form hostname:pathname for compilation directory.
917// Remove the host part if present.
918static llvm::StringRef
919removeHostnameFromPathname(llvm::StringRef path_from_dwarf) {
920 if (!path_from_dwarf.contains(C: ':'))
921 return path_from_dwarf;
922 llvm::StringRef host, path;
923 std::tie(args&: host, args&: path) = path_from_dwarf.split(Separator: ':');
924
925 if (host.contains(C: '/'))
926 return path_from_dwarf;
927
928 // check whether we have a windows path, and so the first character is a
929 // drive-letter not a hostname.
930 if (host.size() == 1 && llvm::isAlpha(C: host[0]) &&
931 (path.starts_with(Prefix: "\\") || path.starts_with(Prefix: "/")))
932 return path_from_dwarf;
933
934 return path;
935}
936
937void DWARFUnit::ComputeCompDirAndGuessPathStyle() {
938 m_comp_dir = FileSpec();
939 const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
940 if (!die)
941 return;
942
943 llvm::StringRef comp_dir = removeHostnameFromPathname(
944 path_from_dwarf: die->GetAttributeValueAsString(cu: this, attr: DW_AT_comp_dir, fail_value: nullptr));
945 if (!comp_dir.empty()) {
946 FileSpec::Style comp_dir_style =
947 FileSpec::GuessPathStyle(absolute_path: comp_dir).value_or(u: FileSpec::Style::native);
948 m_comp_dir = FileSpec(comp_dir, comp_dir_style);
949 } else {
950 // Try to detect the style based on the DW_AT_name attribute, but just store
951 // the detected style in the m_comp_dir field.
952 const char *name =
953 die->GetAttributeValueAsString(cu: this, attr: DW_AT_name, fail_value: nullptr);
954 m_comp_dir = FileSpec(
955 "", FileSpec::GuessPathStyle(absolute_path: name).value_or(u: FileSpec::Style::native));
956 }
957}
958
959void DWARFUnit::ComputeAbsolutePath() {
960 m_file_spec = FileSpec();
961 const DWARFDebugInfoEntry *die = GetUnitDIEPtrOnly();
962 if (!die)
963 return;
964
965 m_file_spec =
966 FileSpec(die->GetAttributeValueAsString(cu: this, attr: DW_AT_name, fail_value: nullptr),
967 GetPathStyle());
968
969 if (m_file_spec->IsRelative())
970 m_file_spec->MakeAbsolute(dir: GetCompilationDirectory());
971}
972
973SymbolFileDWARFDwo *DWARFUnit::GetDwoSymbolFile(bool load_all_debug_info) {
974 if (load_all_debug_info)
975 ExtractUnitDIEIfNeeded();
976 if (m_dwo)
977 return &llvm::cast<SymbolFileDWARFDwo>(Val&: m_dwo->GetSymbolFileDWARF());
978 return nullptr;
979}
980
981const DWARFDebugAranges &DWARFUnit::GetFunctionAranges() {
982 if (m_func_aranges_up == nullptr) {
983 m_func_aranges_up = std::make_unique<DWARFDebugAranges>();
984 const DWARFDebugInfoEntry *die = DIEPtr();
985 if (die)
986 die->BuildFunctionAddressRangeTable(cu: this, debug_aranges: m_func_aranges_up.get());
987
988 if (m_dwo) {
989 const DWARFDebugInfoEntry *dwo_die = m_dwo->DIEPtr();
990 if (dwo_die)
991 dwo_die->BuildFunctionAddressRangeTable(cu: m_dwo.get(),
992 debug_aranges: m_func_aranges_up.get());
993 }
994
995 const bool minimize = false;
996 m_func_aranges_up->Sort(minimize);
997 }
998 return *m_func_aranges_up;
999}
1000
1001llvm::Expected<DWARFUnitSP>
1002DWARFUnit::extract(SymbolFileDWARF &dwarf, user_id_t uid,
1003 const DWARFDataExtractor &debug_info,
1004 DIERef::Section section, lldb::offset_t *offset_ptr) {
1005 assert(debug_info.ValidOffset(*offset_ptr));
1006
1007 DWARFContext &context = dwarf.GetDWARFContext();
1008
1009 // FIXME: Either properly map between DIERef::Section and
1010 // llvm::DWARFSectionKind or switch to llvm's definition entirely.
1011 llvm::DWARFSectionKind section_kind_llvm =
1012 section == DIERef::Section::DebugInfo
1013 ? llvm::DWARFSectionKind::DW_SECT_INFO
1014 : llvm::DWARFSectionKind::DW_SECT_EXT_TYPES;
1015
1016 llvm::DWARFDataExtractor debug_info_llvm = debug_info.GetAsLLVMDWARF();
1017 llvm::DWARFUnitHeader header;
1018 if (llvm::Error extract_err = header.extract(
1019 Context&: context.GetAsLLVM(), debug_info: debug_info_llvm, offset_ptr, SectionKind: section_kind_llvm))
1020 return std::move(extract_err);
1021
1022 if (context.isDwo()) {
1023 const llvm::DWARFUnitIndex::Entry *entry = nullptr;
1024 const llvm::DWARFUnitIndex &index = header.isTypeUnit()
1025 ? context.GetAsLLVM().getTUIndex()
1026 : context.GetAsLLVM().getCUIndex();
1027 if (index) {
1028 if (header.isTypeUnit())
1029 entry = index.getFromHash(Offset: header.getTypeHash());
1030 else if (auto dwo_id = header.getDWOId())
1031 entry = index.getFromHash(Offset: *dwo_id);
1032 }
1033 if (!entry)
1034 entry = index.getFromOffset(Offset: header.getOffset());
1035 if (entry)
1036 if (llvm::Error err = header.applyIndexEntry(Entry: entry))
1037 return std::move(err);
1038 }
1039
1040 const llvm::DWARFDebugAbbrev *abbr = dwarf.DebugAbbrev();
1041 if (!abbr)
1042 return llvm::make_error<llvm::object::GenericBinaryError>(
1043 Args: "No debug_abbrev data");
1044
1045 bool abbr_offset_OK =
1046 dwarf.GetDWARFContext().getOrLoadAbbrevData().ValidOffset(
1047 offset: header.getAbbrOffset());
1048 if (!abbr_offset_OK)
1049 return llvm::make_error<llvm::object::GenericBinaryError>(
1050 Args: "Abbreviation offset for unit is not valid");
1051
1052 llvm::Expected<const llvm::DWARFAbbreviationDeclarationSet *> abbrevs_or_err =
1053 abbr->getAbbreviationDeclarationSet(CUAbbrOffset: header.getAbbrOffset());
1054 if (!abbrevs_or_err)
1055 return abbrevs_or_err.takeError();
1056
1057 const llvm::DWARFAbbreviationDeclarationSet *abbrevs = *abbrevs_or_err;
1058 if (!abbrevs)
1059 return llvm::make_error<llvm::object::GenericBinaryError>(
1060 Args: "No abbrev exists at the specified offset.");
1061
1062 bool is_dwo = dwarf.GetDWARFContext().isDwo();
1063 if (header.isTypeUnit())
1064 return DWARFUnitSP(
1065 new DWARFTypeUnit(dwarf, uid, header, *abbrevs, section, is_dwo));
1066 return DWARFUnitSP(
1067 new DWARFCompileUnit(dwarf, uid, header, *abbrevs, section, is_dwo));
1068}
1069
1070const lldb_private::DWARFDataExtractor &DWARFUnit::GetData() const {
1071 return m_section == DIERef::Section::DebugTypes
1072 ? m_dwarf.GetDWARFContext().getOrLoadDebugTypesData()
1073 : m_dwarf.GetDWARFContext().getOrLoadDebugInfoData();
1074}
1075
1076uint32_t DWARFUnit::GetHeaderByteSize() const {
1077 switch (m_header.getUnitType()) {
1078 case llvm::dwarf::DW_UT_compile:
1079 case llvm::dwarf::DW_UT_partial:
1080 return GetVersion() < 5 ? 11 : 12;
1081 case llvm::dwarf::DW_UT_skeleton:
1082 case llvm::dwarf::DW_UT_split_compile:
1083 return 20;
1084 case llvm::dwarf::DW_UT_type:
1085 case llvm::dwarf::DW_UT_split_type:
1086 return GetVersion() < 5 ? 23 : 24;
1087 }
1088 llvm_unreachable("invalid UnitType.");
1089}
1090
1091std::optional<uint64_t>
1092DWARFUnit::GetStringOffsetSectionItem(uint32_t index) const {
1093 lldb::offset_t offset = GetStrOffsetsBase() + index * 4;
1094 return m_dwarf.GetDWARFContext().getOrLoadStrOffsetsData().GetU32(offset_ptr: &offset);
1095}
1096
1097llvm::Expected<llvm::DWARFAddressRangesVector>
1098DWARFUnit::FindRnglistFromOffset(dw_offset_t offset) {
1099 if (GetVersion() <= 4) {
1100 llvm::DWARFDataExtractor data =
1101 m_dwarf.GetDWARFContext().getOrLoadRangesData().GetAsLLVMDWARF();
1102 data.setAddressSize(m_header.getAddressByteSize());
1103
1104 llvm::DWARFDebugRangeList list;
1105 if (llvm::Error e = list.extract(data, offset_ptr: &offset))
1106 return e;
1107 return list.getAbsoluteRanges(
1108 BaseAddr: llvm::object::SectionedAddress{.Address: GetBaseAddress()});
1109 }
1110
1111 // DWARF >= v5
1112 if (!GetRnglistTable())
1113 return llvm::createStringError(EC: std::errc::invalid_argument,
1114 Fmt: "missing or invalid range list table");
1115
1116 llvm::DWARFDataExtractor data = GetRnglistData().GetAsLLVMDWARF();
1117
1118 // As DW_AT_rnglists_base may be missing we need to call setAddressSize.
1119 data.setAddressSize(m_header.getAddressByteSize());
1120 auto range_list_or_error = GetRnglistTable()->findList(Data: data, Offset: offset);
1121 if (!range_list_or_error)
1122 return range_list_or_error.takeError();
1123
1124 return range_list_or_error->getAbsoluteRanges(
1125 BaseAddr: llvm::object::SectionedAddress{.Address: GetBaseAddress()}, AddressByteSize: GetAddressByteSize(),
1126 LookupPooledAddress: [&](uint32_t index) {
1127 uint32_t index_size = GetAddressByteSize();
1128 dw_offset_t addr_base = GetAddrBase();
1129 lldb::offset_t offset =
1130 addr_base + static_cast<lldb::offset_t>(index) * index_size;
1131 return llvm::object::SectionedAddress{
1132 .Address: m_dwarf.GetDWARFContext().getOrLoadAddrData().GetMaxU64(
1133 offset_ptr: &offset, byte_size: index_size)};
1134 });
1135}
1136
1137llvm::Expected<llvm::DWARFAddressRangesVector>
1138DWARFUnit::FindRnglistFromIndex(uint32_t index) {
1139 llvm::Expected<uint64_t> maybe_offset = GetRnglistOffset(Index: index);
1140 if (!maybe_offset)
1141 return maybe_offset.takeError();
1142 return FindRnglistFromOffset(offset: *maybe_offset);
1143}
1144
1145bool DWARFUnit::HasAny(llvm::ArrayRef<dw_tag_t> tags) {
1146 ExtractUnitDIEIfNeeded();
1147 if (m_dwo)
1148 return m_dwo->HasAny(tags);
1149
1150 for (const auto &die : m_die_array) {
1151 for (const auto tag : tags) {
1152 if (tag == die.Tag())
1153 return true;
1154 }
1155 }
1156 return false;
1157}
1158

source code of lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp