1//===-- ObjectContainerBSDArchive.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 "ObjectContainerBSDArchive.h"
10
11#if defined(_WIN32) || defined(__ANDROID__)
12// Defines from ar, missing on Windows
13#define ARMAG "!<arch>\n"
14#define SARMAG 8
15#define ARFMAG "`\n"
16
17typedef struct ar_hdr {
18  char ar_name[16];
19  char ar_date[12];
20  char ar_uid[6], ar_gid[6];
21  char ar_mode[8];
22  char ar_size[10];
23  char ar_fmag[2];
24} ar_hdr;
25#else
26#include <ar.h>
27#endif
28
29#include "lldb/Core/Module.h"
30#include "lldb/Core/ModuleSpec.h"
31#include "lldb/Core/PluginManager.h"
32#include "lldb/Host/FileSystem.h"
33#include "lldb/Symbol/ObjectFile.h"
34#include "lldb/Utility/ArchSpec.h"
35#include "lldb/Utility/Stream.h"
36#include "lldb/Utility/Timer.h"
37
38#include "llvm/Support/MemoryBuffer.h"
39
40using namespace lldb;
41using namespace lldb_private;
42
43using namespace llvm::object;
44
45LLDB_PLUGIN_DEFINE(ObjectContainerBSDArchive)
46
47ObjectContainerBSDArchive::Object::Object() : ar_name() {}
48
49void ObjectContainerBSDArchive::Object::Clear() {
50  ar_name.Clear();
51  modification_time = 0;
52  uid = 0;
53  gid = 0;
54  mode = 0;
55  size = 0;
56  file_offset = 0;
57  file_size = 0;
58}
59
60lldb::offset_t ObjectContainerBSDArchive::Object::ExtractFromThin(
61    const DataExtractor &data, lldb::offset_t offset,
62    llvm::StringRef stringTable) {
63  size_t ar_name_len = 0;
64  std::string str;
65  char *err;
66
67  // File header
68  //
69  // The common format is as follows.
70  //
71  //  Offset  Length	Name            Format
72  //  0       16      File name       ASCII right padded with spaces (no spaces
73  //  allowed in file name)
74  //  16      12      File mod        Decimal as cstring right padded with
75  //  spaces
76  //  28      6       Owner ID        Decimal as cstring right padded with
77  //  spaces
78  //  34      6       Group ID        Decimal as cstring right padded with
79  //  spaces
80  //  40      8       File mode       Octal   as cstring right padded with
81  //  spaces
82  //  48      10      File byte size  Decimal as cstring right padded with
83  //  spaces
84  //  58      2       File magic      0x60 0x0A
85
86  // Make sure there is enough data for the file header and bail if not
87  if (!data.ValidOffsetForDataOfSize(offset, 60))
88    return LLDB_INVALID_OFFSET;
89
90  str.assign((const char *)data.GetData(&offset, 16), 16);
91  if (!(llvm::StringRef(str).startswith("//") || stringTable.empty())) {
92    // Strip off any trailing spaces.
93    const size_t last_pos = str.find_last_not_of(' ');
94    if (last_pos != std::string::npos) {
95      if (last_pos + 1 < 16)
96        str.erase(last_pos + 1);
97    }
98    int start = strtoul(str.c_str() + 1, &err, 10);
99    int end = stringTable.find('\n', start);
100    str.assign(stringTable.data() + start, end - start - 1);
101    ar_name.SetCString(str.c_str());
102  }
103
104  str.assign((const char *)data.GetData(&offset, 12), 12);
105  modification_time = strtoul(str.c_str(), &err, 10);
106
107  str.assign((const char *)data.GetData(&offset, 6), 6);
108  uid = strtoul(str.c_str(), &err, 10);
109
110  str.assign((const char *)data.GetData(&offset, 6), 6);
111  gid = strtoul(str.c_str(), &err, 10);
112
113  str.assign((const char *)data.GetData(&offset, 8), 8);
114  mode = strtoul(str.c_str(), &err, 8);
115
116  str.assign((const char *)data.GetData(&offset, 10), 10);
117  size = strtoul(str.c_str(), &err, 10);
118
119  str.assign((const char *)data.GetData(&offset, 2), 2);
120  if (str == ARFMAG) {
121    file_offset = offset;
122    file_size = size - ar_name_len;
123    return offset;
124  }
125  return LLDB_INVALID_OFFSET;
126}
127
128lldb::offset_t
129ObjectContainerBSDArchive::Object::Extract(const DataExtractor &data,
130                                           lldb::offset_t offset) {
131  size_t ar_name_len = 0;
132  std::string str;
133  char *err;
134
135  // File header
136  //
137  // The common format is as follows.
138  //
139  //  Offset  Length	Name            Format
140  //  0       16      File name       ASCII right padded with spaces (no spaces
141  //  allowed in file name)
142  //  16      12      File mod        Decimal as cstring right padded with
143  //  spaces
144  //  28      6       Owner ID        Decimal as cstring right padded with
145  //  spaces
146  //  34      6       Group ID        Decimal as cstring right padded with
147  //  spaces
148  //  40      8       File mode       Octal   as cstring right padded with
149  //  spaces
150  //  48      10      File byte size  Decimal as cstring right padded with
151  //  spaces
152  //  58      2       File magic      0x60 0x0A
153
154  // Make sure there is enough data for the file header and bail if not
155  if (!data.ValidOffsetForDataOfSize(offset, 60))
156    return LLDB_INVALID_OFFSET;
157
158  str.assign((const char *)data.GetData(&offset, 16), 16);
159  if (llvm::StringRef(str).startswith("#1/")) {
160    // If the name is longer than 16 bytes, or contains an embedded space then
161    // it will use this format where the length of the name is here and the
162    // name characters are after this header.
163    ar_name_len = strtoul(str.c_str() + 3, &err, 10);
164  } else {
165    // Strip off any trailing spaces.
166    const size_t last_pos = str.find_last_not_of(' ');
167    if (last_pos != std::string::npos) {
168      if (last_pos + 1 < 16)
169        str.erase(last_pos + 1);
170    }
171    ar_name.SetCString(str.c_str());
172  }
173
174  str.assign((const char *)data.GetData(&offset, 12), 12);
175  modification_time = strtoul(str.c_str(), &err, 10);
176
177  str.assign((const char *)data.GetData(&offset, 6), 6);
178  uid = strtoul(str.c_str(), &err, 10);
179
180  str.assign((const char *)data.GetData(&offset, 6), 6);
181  gid = strtoul(str.c_str(), &err, 10);
182
183  str.assign((const char *)data.GetData(&offset, 8), 8);
184  mode = strtoul(str.c_str(), &err, 8);
185
186  str.assign((const char *)data.GetData(&offset, 10), 10);
187  size = strtoul(str.c_str(), &err, 10);
188
189  str.assign((const char *)data.GetData(&offset, 2), 2);
190  if (str == ARFMAG) {
191    if (ar_name_len > 0) {
192      const void *ar_name_ptr = data.GetData(&offset, ar_name_len);
193      // Make sure there was enough data for the string value and bail if not
194      if (ar_name_ptr == nullptr)
195        return LLDB_INVALID_OFFSET;
196      str.assign((const char *)ar_name_ptr, ar_name_len);
197      ar_name.SetCString(str.c_str());
198    }
199    file_offset = offset;
200    file_size = size - ar_name_len;
201    return offset;
202  }
203  return LLDB_INVALID_OFFSET;
204}
205
206ObjectContainerBSDArchive::Archive::Archive(const lldb_private::ArchSpec &arch,
207                                            const llvm::sys::TimePoint<> &time,
208                                            lldb::offset_t file_offset,
209                                            lldb_private::DataExtractor &data,
210                                            ArchiveType archive_type)
211    : m_arch(arch), m_modification_time(time), m_file_offset(file_offset),
212      m_objects(), m_data(data), m_archive_type(archive_type) {}
213
214ObjectContainerBSDArchive::Archive::~Archive() = default;
215
216size_t ObjectContainerBSDArchive::Archive::ParseObjects() {
217  DataExtractor &data = m_data;
218  std::string str;
219  lldb::offset_t offset = 0;
220  str.assign((const char *)data.GetData(&offset, SARMAG), SARMAG);
221  if (str == ARMAG) {
222    Object obj;
223    do {
224      offset = obj.Extract(data, offset);
225      if (offset == LLDB_INVALID_OFFSET)
226        break;
227      size_t obj_idx = m_objects.size();
228      m_objects.push_back(obj);
229      // Insert all of the C strings out of order for now...
230      m_object_name_to_index_map.Append(obj.ar_name, obj_idx);
231      offset += obj.file_size;
232      obj.Clear();
233    } while (data.ValidOffset(offset));
234
235    // Now sort all of the object name pointers
236    m_object_name_to_index_map.Sort();
237  } else if (str == ThinArchiveMagic) {
238    Object obj;
239    size_t obj_idx;
240
241    // Retrieve symbol table
242    offset = obj.ExtractFromThin(data, offset, "");
243    if (offset == LLDB_INVALID_OFFSET)
244      return m_objects.size();
245    obj_idx = m_objects.size();
246    m_objects.push_back(obj);
247    // Insert all of the C strings out of order for now...
248    m_object_name_to_index_map.Append(obj.ar_name, obj_idx);
249    offset += obj.file_size;
250    obj.Clear();
251
252    // Retrieve string table
253    offset = obj.ExtractFromThin(data, offset, "");
254    if (offset == LLDB_INVALID_OFFSET)
255      return m_objects.size();
256    obj_idx = m_objects.size();
257    m_objects.push_back(obj);
258    // Insert all of the C strings out of order for now...
259    m_object_name_to_index_map.Append(obj.ar_name, obj_idx);
260    // Extract string table
261    llvm::StringRef strtab((const char *)data.GetData(&offset, obj.size),
262                           obj.size);
263    obj.Clear();
264
265    // Retrieve object files
266    do {
267      offset = obj.ExtractFromThin(data, offset, strtab);
268      if (offset == LLDB_INVALID_OFFSET)
269        break;
270      obj_idx = m_objects.size();
271      m_objects.push_back(obj);
272      // Insert all of the C strings out of order for now...
273      m_object_name_to_index_map.Append(obj.ar_name, obj_idx);
274      obj.Clear();
275    } while (data.ValidOffset(offset));
276
277    // Now sort all of the object name pointers
278    m_object_name_to_index_map.Sort();
279  }
280  return m_objects.size();
281}
282
283ObjectContainerBSDArchive::Object *
284ObjectContainerBSDArchive::Archive::FindObject(
285    ConstString object_name, const llvm::sys::TimePoint<> &object_mod_time) {
286  const ObjectNameToIndexMap::Entry *match =
287      m_object_name_to_index_map.FindFirstValueForName(object_name);
288  if (!match)
289    return nullptr;
290  if (object_mod_time == llvm::sys::TimePoint<>())
291    return &m_objects[match->value];
292
293  const uint64_t object_modification_date = llvm::sys::toTimeT(object_mod_time);
294  if (m_objects[match->value].modification_time == object_modification_date)
295    return &m_objects[match->value];
296
297  const ObjectNameToIndexMap::Entry *next_match =
298      m_object_name_to_index_map.FindNextValueForName(match);
299  while (next_match) {
300    if (m_objects[next_match->value].modification_time ==
301        object_modification_date)
302      return &m_objects[next_match->value];
303    next_match = m_object_name_to_index_map.FindNextValueForName(next_match);
304  }
305
306  return nullptr;
307}
308
309ObjectContainerBSDArchive::Archive::shared_ptr
310ObjectContainerBSDArchive::Archive::FindCachedArchive(
311    const FileSpec &file, const ArchSpec &arch,
312    const llvm::sys::TimePoint<> &time, lldb::offset_t file_offset) {
313  std::lock_guard<std::recursive_mutex> guard(Archive::GetArchiveCacheMutex());
314  shared_ptr archive_sp;
315  Archive::Map &archive_map = Archive::GetArchiveCache();
316  Archive::Map::iterator pos = archive_map.find(file);
317  // Don't cache a value for "archive_map.end()" below since we might delete an
318  // archive entry...
319  while (pos != archive_map.end() && pos->first == file) {
320    bool match = true;
321    if (arch.IsValid() &&
322        !pos->second->GetArchitecture().IsCompatibleMatch(arch))
323      match = false;
324    else if (file_offset != LLDB_INVALID_OFFSET &&
325             pos->second->GetFileOffset() != file_offset)
326      match = false;
327    if (match) {
328      if (pos->second->GetModificationTime() == time) {
329        return pos->second;
330      } else {
331        // We have a file at the same path with the same architecture whose
332        // modification time doesn't match. It doesn't make sense for us to
333        // continue to use this BSD archive since we cache only the object info
334        // which consists of file time info and also the file offset and file
335        // size of any contained objects. Since this information is now out of
336        // date, we won't get the correct information if we go and extract the
337        // file data, so we should remove the old and outdated entry.
338        archive_map.erase(pos);
339        pos = archive_map.find(file);
340        continue; // Continue to next iteration so we don't increment pos
341                  // below...
342      }
343    }
344    ++pos;
345  }
346  return archive_sp;
347}
348
349ObjectContainerBSDArchive::Archive::shared_ptr
350ObjectContainerBSDArchive::Archive::ParseAndCacheArchiveForFile(
351    const FileSpec &file, const ArchSpec &arch,
352    const llvm::sys::TimePoint<> &time, lldb::offset_t file_offset,
353    DataExtractor &data, ArchiveType archive_type) {
354  shared_ptr archive_sp(
355      new Archive(arch, time, file_offset, data, archive_type));
356  if (archive_sp) {
357    const size_t num_objects = archive_sp->ParseObjects();
358    if (num_objects > 0) {
359      std::lock_guard<std::recursive_mutex> guard(
360          Archive::GetArchiveCacheMutex());
361      Archive::GetArchiveCache().insert(std::make_pair(file, archive_sp));
362    } else {
363      archive_sp.reset();
364    }
365  }
366  return archive_sp;
367}
368
369ObjectContainerBSDArchive::Archive::Map &
370ObjectContainerBSDArchive::Archive::GetArchiveCache() {
371  static Archive::Map g_archive_map;
372  return g_archive_map;
373}
374
375std::recursive_mutex &
376ObjectContainerBSDArchive::Archive::GetArchiveCacheMutex() {
377  static std::recursive_mutex g_archive_map_mutex;
378  return g_archive_map_mutex;
379}
380
381void ObjectContainerBSDArchive::Initialize() {
382  PluginManager::RegisterPlugin(GetPluginNameStatic(),
383                                GetPluginDescriptionStatic(), CreateInstance,
384                                GetModuleSpecifications);
385}
386
387void ObjectContainerBSDArchive::Terminate() {
388  PluginManager::UnregisterPlugin(CreateInstance);
389}
390
391ObjectContainer *ObjectContainerBSDArchive::CreateInstance(
392    const lldb::ModuleSP &module_sp, DataBufferSP &data_sp,
393    lldb::offset_t data_offset, const FileSpec *file,
394    lldb::offset_t file_offset, lldb::offset_t length) {
395  ConstString object_name(module_sp->GetObjectName());
396  if (!object_name)
397    return nullptr;
398
399  if (data_sp) {
400    // We have data, which means this is the first 512 bytes of the file Check
401    // to see if the magic bytes match and if they do, read the entire table of
402    // contents for the archive and cache it
403    DataExtractor data;
404    data.SetData(data_sp, data_offset, length);
405    ArchiveType archive_type = ObjectContainerBSDArchive::MagicBytesMatch(data);
406    if (file && data_sp && archive_type != ArchiveType::Invalid) {
407      LLDB_SCOPED_TIMERF(
408          "ObjectContainerBSDArchive::CreateInstance (module = %s, file = "
409          "%p, file_offset = 0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")",
410          module_sp->GetFileSpec().GetPath().c_str(),
411          static_cast<const void *>(file), static_cast<uint64_t>(file_offset),
412          static_cast<uint64_t>(length));
413
414      // Map the entire .a file to be sure that we don't lose any data if the
415      // file gets updated by a new build while this .a file is being used for
416      // debugging
417      DataBufferSP archive_data_sp =
418          FileSystem::Instance().CreateDataBuffer(*file, length, file_offset);
419      if (!archive_data_sp)
420        return nullptr;
421
422      lldb::offset_t archive_data_offset = 0;
423
424      Archive::shared_ptr archive_sp(Archive::FindCachedArchive(
425          *file, module_sp->GetArchitecture(), module_sp->GetModificationTime(),
426          file_offset));
427      std::unique_ptr<ObjectContainerBSDArchive> container_up(
428          new ObjectContainerBSDArchive(module_sp, archive_data_sp,
429                                        archive_data_offset, file, file_offset,
430                                        length, archive_type));
431
432      if (container_up) {
433        if (archive_sp) {
434          // We already have this archive in our cache, use it
435          container_up->SetArchive(archive_sp);
436          return container_up.release();
437        } else if (container_up->ParseHeader())
438          return container_up.release();
439      }
440    }
441  } else {
442    // No data, just check for a cached archive
443    Archive::shared_ptr archive_sp(Archive::FindCachedArchive(
444        *file, module_sp->GetArchitecture(), module_sp->GetModificationTime(),
445        file_offset));
446    if (archive_sp) {
447      std::unique_ptr<ObjectContainerBSDArchive> container_up(
448          new ObjectContainerBSDArchive(module_sp, data_sp, data_offset, file,
449                                        file_offset, length,
450                                        archive_sp->GetArchiveType()));
451
452      if (container_up) {
453        // We already have this archive in our cache, use it
454        container_up->SetArchive(archive_sp);
455        return container_up.release();
456      }
457    }
458  }
459  return nullptr;
460}
461
462ArchiveType
463ObjectContainerBSDArchive::MagicBytesMatch(const DataExtractor &data) {
464  uint32_t offset = 0;
465  const char *armag = (const char *)data.PeekData(offset, sizeof(ar_hdr));
466  if (armag == nullptr)
467    return ArchiveType::Invalid;
468  if (::strncmp(armag, ARMAG, SARMAG) == 0) {
469    armag += offsetof(struct ar_hdr, ar_fmag) + SARMAG;
470    if (strncmp(armag, ARFMAG, 2) == 0)
471      return ArchiveType::Archive;
472  } else if (::strncmp(armag, ThinArchiveMagic, strlen(ThinArchiveMagic)) ==
473             0) {
474    armag += offsetof(struct ar_hdr, ar_fmag) + strlen(ThinArchiveMagic);
475    if (strncmp(armag, ARFMAG, 2) == 0) {
476      return ArchiveType::ThinArchive;
477    }
478  }
479  return ArchiveType::Invalid;
480}
481
482ObjectContainerBSDArchive::ObjectContainerBSDArchive(
483    const lldb::ModuleSP &module_sp, DataBufferSP &data_sp,
484    lldb::offset_t data_offset, const lldb_private::FileSpec *file,
485    lldb::offset_t file_offset, lldb::offset_t size, ArchiveType archive_type)
486    : ObjectContainer(module_sp, file, file_offset, size, data_sp, data_offset),
487      m_archive_sp() {
488  m_archive_type = archive_type;
489}
490
491void ObjectContainerBSDArchive::SetArchive(Archive::shared_ptr &archive_sp) {
492  m_archive_sp = archive_sp;
493}
494
495ObjectContainerBSDArchive::~ObjectContainerBSDArchive() = default;
496
497bool ObjectContainerBSDArchive::ParseHeader() {
498  if (m_archive_sp.get() == nullptr) {
499    if (m_data.GetByteSize() > 0) {
500      ModuleSP module_sp(GetModule());
501      if (module_sp) {
502        m_archive_sp = Archive::ParseAndCacheArchiveForFile(
503            m_file, module_sp->GetArchitecture(),
504            module_sp->GetModificationTime(), m_offset, m_data, m_archive_type);
505      }
506      // Clear the m_data that contains the entire archive data and let our
507      // m_archive_sp hold onto the data.
508      m_data.Clear();
509    }
510  }
511  return m_archive_sp.get() != nullptr;
512}
513
514FileSpec GetChildFileSpecificationsFromThin(llvm::StringRef childPath,
515                                            const FileSpec &parentFileSpec) {
516  llvm::SmallString<128> FullPath;
517  if (llvm::sys::path::is_absolute(childPath)) {
518    FullPath = childPath;
519  } else {
520    FullPath = parentFileSpec.GetDirectory().GetStringRef();
521    llvm::sys::path::append(FullPath, childPath);
522  }
523  FileSpec child = FileSpec(FullPath.str(), llvm::sys::path::Style::posix);
524  return child;
525}
526
527ObjectFileSP ObjectContainerBSDArchive::GetObjectFile(const FileSpec *file) {
528  ModuleSP module_sp(GetModule());
529  if (module_sp) {
530    if (module_sp->GetObjectName() && m_archive_sp) {
531      Object *object = m_archive_sp->FindObject(
532          module_sp->GetObjectName(), module_sp->GetObjectModificationTime());
533      if (object) {
534        if (m_archive_type == ArchiveType::ThinArchive) {
535          // Set file to child object file
536          FileSpec child = GetChildFileSpecificationsFromThin(
537              object->ar_name.GetStringRef(), m_file);
538          lldb::offset_t file_offset = 0;
539          lldb::offset_t file_size = object->size;
540          std::shared_ptr<DataBuffer> child_data_sp =
541              FileSystem::Instance().CreateDataBuffer(child, file_size,
542                                                      file_offset);
543          if (child_data_sp->GetByteSize() != object->file_size)
544            return ObjectFileSP();
545          lldb::offset_t data_offset = 0;
546          return ObjectFile::FindPlugin(
547              module_sp, &child, m_offset + object->file_offset,
548              object->file_size, child_data_sp, data_offset);
549        }
550        lldb::offset_t data_offset = object->file_offset;
551        return ObjectFile::FindPlugin(
552            module_sp, file, m_offset + object->file_offset, object->file_size,
553            m_archive_sp->GetData().GetSharedDataBuffer(), data_offset);
554      }
555    }
556  }
557  return ObjectFileSP();
558}
559
560size_t ObjectContainerBSDArchive::GetModuleSpecifications(
561    const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp,
562    lldb::offset_t data_offset, lldb::offset_t file_offset,
563    lldb::offset_t file_size, lldb_private::ModuleSpecList &specs) {
564
565  // We have data, which means this is the first 512 bytes of the file Check to
566  // see if the magic bytes match and if they do, read the entire table of
567  // contents for the archive and cache it
568  DataExtractor data;
569  data.SetData(data_sp, data_offset, data_sp->GetByteSize());
570  ArchiveType archive_type = ObjectContainerBSDArchive::MagicBytesMatch(data);
571  if (!file || !data_sp || archive_type == ArchiveType::Invalid)
572    return 0;
573
574  const size_t initial_count = specs.GetSize();
575  llvm::sys::TimePoint<> file_mod_time = FileSystem::Instance().GetModificationTime(file);
576  Archive::shared_ptr archive_sp(
577      Archive::FindCachedArchive(file, ArchSpec(), file_mod_time, file_offset));
578  bool set_archive_arch = false;
579  if (!archive_sp) {
580    set_archive_arch = true;
581    data_sp =
582        FileSystem::Instance().CreateDataBuffer(file, file_size, file_offset);
583    if (data_sp) {
584      data.SetData(data_sp, 0, data_sp->GetByteSize());
585      archive_sp = Archive::ParseAndCacheArchiveForFile(
586          file, ArchSpec(), file_mod_time, file_offset, data, archive_type);
587    }
588  }
589
590  if (archive_sp) {
591    const size_t num_objects = archive_sp->GetNumObjects();
592    for (size_t idx = 0; idx < num_objects; ++idx) {
593      const Object *object = archive_sp->GetObjectAtIndex(idx);
594      if (object) {
595        if (archive_sp->GetArchiveType() == ArchiveType::ThinArchive) {
596          if (object->ar_name.IsEmpty())
597            continue;
598          FileSpec child = GetChildFileSpecificationsFromThin(
599              object->ar_name.GetStringRef(), file);
600          if (ObjectFile::GetModuleSpecifications(child, 0, object->file_size,
601                                                  specs)) {
602            ModuleSpec &spec =
603                specs.GetModuleSpecRefAtIndex(specs.GetSize() - 1);
604            llvm::sys::TimePoint<> object_mod_time(
605                std::chrono::seconds(object->modification_time));
606            spec.GetObjectName() = object->ar_name;
607            spec.SetObjectOffset(0);
608            spec.SetObjectSize(object->file_size);
609            spec.GetObjectModificationTime() = object_mod_time;
610          }
611          continue;
612        }
613        const lldb::offset_t object_file_offset =
614            file_offset + object->file_offset;
615        if (object->file_offset < file_size && file_size > object_file_offset) {
616          if (ObjectFile::GetModuleSpecifications(
617                  file, object_file_offset, file_size - object_file_offset,
618                  specs)) {
619            ModuleSpec &spec =
620                specs.GetModuleSpecRefAtIndex(specs.GetSize() - 1);
621            llvm::sys::TimePoint<> object_mod_time(
622                std::chrono::seconds(object->modification_time));
623            spec.GetObjectName() = object->ar_name;
624            spec.SetObjectOffset(object_file_offset);
625            spec.SetObjectSize(file_size - object_file_offset);
626            spec.GetObjectModificationTime() = object_mod_time;
627          }
628        }
629      }
630    }
631  }
632  const size_t end_count = specs.GetSize();
633  size_t num_specs_added = end_count - initial_count;
634  if (set_archive_arch && num_specs_added > 0) {
635    // The archive was created but we didn't have an architecture so we need to
636    // set it
637    for (size_t i = initial_count; i < end_count; ++i) {
638      ModuleSpec module_spec;
639      if (specs.GetModuleSpecAtIndex(i, module_spec)) {
640        if (module_spec.GetArchitecture().IsValid()) {
641          archive_sp->SetArchitecture(module_spec.GetArchitecture());
642          break;
643        }
644      }
645    }
646  }
647  return num_specs_added;
648}
649