1 //===-- ObjectFile.cpp ------------------------------------------*- C++ -*-===//
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 "lldb/Symbol/ObjectFile.h"
11 #include "Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h"
12 #include "lldb/Core/Module.h"
13 #include "lldb/Core/ModuleSpec.h"
14 #include "lldb/Core/PluginManager.h"
15 #include "lldb/Core/Section.h"
16 #include "lldb/Core/Timer.h"
17 #include "lldb/Symbol/ObjectContainer.h"
18 #include "lldb/Symbol/SymbolFile.h"
19 #include "lldb/Target/Process.h"
20 #include "lldb/Target/RegisterContext.h"
21 #include "lldb/Target/SectionLoadList.h"
22 #include "lldb/Target/Target.h"
23 #include "lldb/Utility/DataBuffer.h"
24 #include "lldb/Utility/DataBufferHeap.h"
25 #include "lldb/Utility/DataBufferLLVM.h"
26 #include "lldb/Utility/Log.h"
27 #include "lldb/Utility/RegularExpression.h"
28 #include "lldb/lldb-private.h"
29 
30 using namespace lldb;
31 using namespace lldb_private;
32 
33 ObjectFileSP
34 ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp, const FileSpec *file,
35                        lldb::offset_t file_offset, lldb::offset_t file_size,
36                        DataBufferSP &data_sp, lldb::offset_t &data_offset) {
37   ObjectFileSP object_file_sp;
38 
39   if (module_sp) {
40     Timer scoped_timer(
41         LLVM_PRETTY_FUNCTION,
42         "ObjectFile::FindPlugin (module = %s, file = %p, file_offset = "
43         "0x%8.8" PRIx64 ", file_size = 0x%8.8" PRIx64 ")",
44         module_sp->GetFileSpec().GetPath().c_str(),
45         static_cast<const void *>(file), static_cast<uint64_t>(file_offset),
46         static_cast<uint64_t>(file_size));
47     if (file) {
48       FileSpec archive_file;
49       ObjectContainerCreateInstance create_object_container_callback;
50 
51       const bool file_exists = file->Exists();
52       if (!data_sp) {
53         // We have an object name which most likely means we have
54         // a .o file in a static archive (.a file). Try and see if
55         // we have a cached archive first without reading any data
56         // first
57         if (file_exists && module_sp->GetObjectName()) {
58           for (uint32_t idx = 0;
59                (create_object_container_callback =
60                     PluginManager::GetObjectContainerCreateCallbackAtIndex(
61                         idx)) != nullptr;
62                ++idx) {
63             std::unique_ptr<ObjectContainer> object_container_ap(
64                 create_object_container_callback(module_sp, data_sp,
65                                                  data_offset, file, file_offset,
66                                                  file_size));
67 
68             if (object_container_ap.get())
69               object_file_sp = object_container_ap->GetObjectFile(file);
70 
71             if (object_file_sp.get())
72               return object_file_sp;
73           }
74         }
75         // Ok, we didn't find any containers that have a named object, now
76         // lets read the first 512 bytes from the file so the object file
77         // and object container plug-ins can use these bytes to see if they
78         // can parse this file.
79         if (file_size > 0) {
80           data_sp =
81               DataBufferLLVM::CreateSliceFromPath(file->GetPath(), 512, file_offset);
82           data_offset = 0;
83         }
84       }
85 
86       if (!data_sp || data_sp->GetByteSize() == 0) {
87         // Check for archive file with format "/path/to/archive.a(object.o)"
88         char path_with_object[PATH_MAX * 2];
89         module_sp->GetFileSpec().GetPath(path_with_object,
90                                          sizeof(path_with_object));
91 
92         ConstString archive_object;
93         const bool must_exist = true;
94         if (ObjectFile::SplitArchivePathWithObject(
95                 path_with_object, archive_file, archive_object, must_exist)) {
96           file_size = archive_file.GetByteSize();
97           if (file_size > 0) {
98             file = &archive_file;
99             module_sp->SetFileSpecAndObjectName(archive_file, archive_object);
100             // Check if this is a object container by iterating through all
101             // object
102             // container plugin instances and then trying to get an object file
103             // from the container plugins since we had a name. Also, don't read
104             // ANY data in case there is data cached in the container plug-ins
105             // (like BSD archives caching the contained objects within an file).
106             for (uint32_t idx = 0;
107                  (create_object_container_callback =
108                       PluginManager::GetObjectContainerCreateCallbackAtIndex(
109                           idx)) != nullptr;
110                  ++idx) {
111               std::unique_ptr<ObjectContainer> object_container_ap(
112                   create_object_container_callback(module_sp, data_sp,
113                                                    data_offset, file,
114                                                    file_offset, file_size));
115 
116               if (object_container_ap.get())
117                 object_file_sp = object_container_ap->GetObjectFile(file);
118 
119               if (object_file_sp.get())
120                 return object_file_sp;
121             }
122             // We failed to find any cached object files in the container
123             // plug-ins, so lets read the first 512 bytes and try again below...
124             data_sp = DataBufferLLVM::CreateSliceFromPath(archive_file.GetPath(),
125                                                      512, file_offset);
126           }
127         }
128       }
129 
130       if (data_sp && data_sp->GetByteSize() > 0) {
131         // Check if this is a normal object file by iterating through
132         // all object file plugin instances.
133         ObjectFileCreateInstance create_object_file_callback;
134         for (uint32_t idx = 0;
135              (create_object_file_callback =
136                   PluginManager::GetObjectFileCreateCallbackAtIndex(idx)) !=
137              nullptr;
138              ++idx) {
139           object_file_sp.reset(create_object_file_callback(
140               module_sp, data_sp, data_offset, file, file_offset, file_size));
141           if (object_file_sp.get())
142             return object_file_sp;
143         }
144 
145         // Check if this is a object container by iterating through
146         // all object container plugin instances and then trying to get
147         // an object file from the container.
148         for (uint32_t idx = 0;
149              (create_object_container_callback =
150                   PluginManager::GetObjectContainerCreateCallbackAtIndex(
151                       idx)) != nullptr;
152              ++idx) {
153           std::unique_ptr<ObjectContainer> object_container_ap(
154               create_object_container_callback(module_sp, data_sp, data_offset,
155                                                file, file_offset, file_size));
156 
157           if (object_container_ap.get())
158             object_file_sp = object_container_ap->GetObjectFile(file);
159 
160           if (object_file_sp.get())
161             return object_file_sp;
162         }
163       }
164     }
165   }
166   // We didn't find it, so clear our shared pointer in case it
167   // contains anything and return an empty shared pointer
168   object_file_sp.reset();
169   return object_file_sp;
170 }
171 
172 ObjectFileSP ObjectFile::FindPlugin(const lldb::ModuleSP &module_sp,
173                                     const ProcessSP &process_sp,
174                                     lldb::addr_t header_addr,
175                                     DataBufferSP &data_sp) {
176   ObjectFileSP object_file_sp;
177 
178   if (module_sp) {
179     Timer scoped_timer(LLVM_PRETTY_FUNCTION, "ObjectFile::FindPlugin (module = "
180                                              "%s, process = %p, header_addr = "
181                                              "0x%" PRIx64 ")",
182                        module_sp->GetFileSpec().GetPath().c_str(),
183                        static_cast<void *>(process_sp.get()), header_addr);
184     uint32_t idx;
185 
186     // Check if this is a normal object file by iterating through
187     // all object file plugin instances.
188     ObjectFileCreateMemoryInstance create_callback;
189     for (idx = 0;
190          (create_callback =
191               PluginManager::GetObjectFileCreateMemoryCallbackAtIndex(idx)) !=
192          nullptr;
193          ++idx) {
194       object_file_sp.reset(
195           create_callback(module_sp, data_sp, process_sp, header_addr));
196       if (object_file_sp.get())
197         return object_file_sp;
198     }
199   }
200 
201   // We didn't find it, so clear our shared pointer in case it
202   // contains anything and return an empty shared pointer
203   object_file_sp.reset();
204   return object_file_sp;
205 }
206 
207 size_t ObjectFile::GetModuleSpecifications(const FileSpec &file,
208                                            lldb::offset_t file_offset,
209                                            lldb::offset_t file_size,
210                                            ModuleSpecList &specs) {
211   DataBufferSP data_sp = DataBufferLLVM::CreateSliceFromPath(file.GetPath(), 512, file_offset);
212   if (data_sp) {
213     if (file_size == 0) {
214       const lldb::offset_t actual_file_size = file.GetByteSize();
215       if (actual_file_size > file_offset)
216         file_size = actual_file_size - file_offset;
217     }
218     return ObjectFile::GetModuleSpecifications(file,        // file spec
219                                                data_sp,     // data bytes
220                                                0,           // data offset
221                                                file_offset, // file offset
222                                                file_size,   // file length
223                                                specs);
224   }
225   return 0;
226 }
227 
228 size_t ObjectFile::GetModuleSpecifications(
229     const lldb_private::FileSpec &file, lldb::DataBufferSP &data_sp,
230     lldb::offset_t data_offset, lldb::offset_t file_offset,
231     lldb::offset_t file_size, lldb_private::ModuleSpecList &specs) {
232   const size_t initial_count = specs.GetSize();
233   ObjectFileGetModuleSpecifications callback;
234   uint32_t i;
235   // Try the ObjectFile plug-ins
236   for (i = 0;
237        (callback =
238             PluginManager::GetObjectFileGetModuleSpecificationsCallbackAtIndex(
239                 i)) != nullptr;
240        ++i) {
241     if (callback(file, data_sp, data_offset, file_offset, file_size, specs) > 0)
242       return specs.GetSize() - initial_count;
243   }
244 
245   // Try the ObjectContainer plug-ins
246   for (i = 0;
247        (callback = PluginManager::
248             GetObjectContainerGetModuleSpecificationsCallbackAtIndex(i)) !=
249        nullptr;
250        ++i) {
251     if (callback(file, data_sp, data_offset, file_offset, file_size, specs) > 0)
252       return specs.GetSize() - initial_count;
253   }
254   return 0;
255 }
256 
257 ObjectFile::ObjectFile(const lldb::ModuleSP &module_sp,
258                        const FileSpec *file_spec_ptr,
259                        lldb::offset_t file_offset, lldb::offset_t length,
260                        const lldb::DataBufferSP &data_sp,
261                        lldb::offset_t data_offset)
262     : ModuleChild(module_sp),
263       m_file(), // This file could be different from the original module's file
264       m_type(eTypeInvalid), m_strata(eStrataInvalid),
265       m_file_offset(file_offset), m_length(length), m_data(),
266       m_unwind_table(*this), m_process_wp(),
267       m_memory_addr(LLDB_INVALID_ADDRESS), m_sections_ap(), m_symtab_ap(),
268       m_synthetic_symbol_idx(0) {
269   if (file_spec_ptr)
270     m_file = *file_spec_ptr;
271   if (data_sp)
272     m_data.SetData(data_sp, data_offset, length);
273   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
274   if (log)
275     log->Printf("%p ObjectFile::ObjectFile() module = %p (%s), file = %s, "
276                 "file_offset = 0x%8.8" PRIx64 ", size = %" PRIu64,
277                 static_cast<void *>(this), static_cast<void *>(module_sp.get()),
278                 module_sp->GetSpecificationDescription().c_str(),
279                 m_file ? m_file.GetPath().c_str() : "<NULL>", m_file_offset,
280                 m_length);
281 }
282 
283 ObjectFile::ObjectFile(const lldb::ModuleSP &module_sp,
284                        const ProcessSP &process_sp, lldb::addr_t header_addr,
285                        DataBufferSP &header_data_sp)
286     : ModuleChild(module_sp), m_file(), m_type(eTypeInvalid),
287       m_strata(eStrataInvalid), m_file_offset(0), m_length(0), m_data(),
288       m_unwind_table(*this), m_process_wp(process_sp),
289       m_memory_addr(header_addr), m_sections_ap(), m_symtab_ap(),
290       m_synthetic_symbol_idx(0) {
291   if (header_data_sp)
292     m_data.SetData(header_data_sp, 0, header_data_sp->GetByteSize());
293   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
294   if (log)
295     log->Printf("%p ObjectFile::ObjectFile() module = %p (%s), process = %p, "
296                 "header_addr = 0x%" PRIx64,
297                 static_cast<void *>(this), static_cast<void *>(module_sp.get()),
298                 module_sp->GetSpecificationDescription().c_str(),
299                 static_cast<void *>(process_sp.get()), m_memory_addr);
300 }
301 
302 ObjectFile::~ObjectFile() {
303   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
304   if (log)
305     log->Printf("%p ObjectFile::~ObjectFile ()\n", static_cast<void *>(this));
306 }
307 
308 bool ObjectFile::SetModulesArchitecture(const ArchSpec &new_arch) {
309   ModuleSP module_sp(GetModule());
310   if (module_sp)
311     return module_sp->SetArchitecture(new_arch);
312   return false;
313 }
314 
315 AddressClass ObjectFile::GetAddressClass(addr_t file_addr) {
316   Symtab *symtab = GetSymtab();
317   if (symtab) {
318     Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr);
319     if (symbol) {
320       if (symbol->ValueIsAddress()) {
321         const SectionSP section_sp(symbol->GetAddressRef().GetSection());
322         if (section_sp) {
323           const SectionType section_type = section_sp->GetType();
324           switch (section_type) {
325           case eSectionTypeInvalid:
326             return eAddressClassUnknown;
327           case eSectionTypeCode:
328             return eAddressClassCode;
329           case eSectionTypeContainer:
330             return eAddressClassUnknown;
331           case eSectionTypeData:
332           case eSectionTypeDataCString:
333           case eSectionTypeDataCStringPointers:
334           case eSectionTypeDataSymbolAddress:
335           case eSectionTypeData4:
336           case eSectionTypeData8:
337           case eSectionTypeData16:
338           case eSectionTypeDataPointers:
339           case eSectionTypeZeroFill:
340           case eSectionTypeDataObjCMessageRefs:
341           case eSectionTypeDataObjCCFStrings:
342           case eSectionTypeGoSymtab:
343             return eAddressClassData;
344           case eSectionTypeDebug:
345           case eSectionTypeDWARFDebugAbbrev:
346           case eSectionTypeDWARFDebugAddr:
347           case eSectionTypeDWARFDebugAranges:
348           case eSectionTypeDWARFDebugFrame:
349           case eSectionTypeDWARFDebugInfo:
350           case eSectionTypeDWARFDebugLine:
351           case eSectionTypeDWARFDebugLoc:
352           case eSectionTypeDWARFDebugMacInfo:
353           case eSectionTypeDWARFDebugMacro:
354           case eSectionTypeDWARFDebugPubNames:
355           case eSectionTypeDWARFDebugPubTypes:
356           case eSectionTypeDWARFDebugRanges:
357           case eSectionTypeDWARFDebugStr:
358           case eSectionTypeDWARFDebugStrOffsets:
359           case eSectionTypeDWARFAppleNames:
360           case eSectionTypeDWARFAppleTypes:
361           case eSectionTypeDWARFAppleNamespaces:
362           case eSectionTypeDWARFAppleObjC:
363             return eAddressClassDebug;
364           case eSectionTypeEHFrame:
365           case eSectionTypeARMexidx:
366           case eSectionTypeARMextab:
367           case eSectionTypeCompactUnwind:
368             return eAddressClassRuntime;
369           case eSectionTypeELFSymbolTable:
370           case eSectionTypeELFDynamicSymbols:
371           case eSectionTypeELFRelocationEntries:
372           case eSectionTypeELFDynamicLinkInfo:
373           case eSectionTypeOther:
374             return eAddressClassUnknown;
375           case eSectionTypeAbsoluteAddress:
376             // In case of absolute sections decide the address class based on
377             // the symbol
378             // type because the section type isn't specify if it is a code or a
379             // data
380             // section.
381             break;
382           }
383         }
384       }
385 
386       const SymbolType symbol_type = symbol->GetType();
387       switch (symbol_type) {
388       case eSymbolTypeAny:
389         return eAddressClassUnknown;
390       case eSymbolTypeAbsolute:
391         return eAddressClassUnknown;
392       case eSymbolTypeCode:
393         return eAddressClassCode;
394       case eSymbolTypeTrampoline:
395         return eAddressClassCode;
396       case eSymbolTypeResolver:
397         return eAddressClassCode;
398       case eSymbolTypeData:
399         return eAddressClassData;
400       case eSymbolTypeRuntime:
401         return eAddressClassRuntime;
402       case eSymbolTypeException:
403         return eAddressClassRuntime;
404       case eSymbolTypeSourceFile:
405         return eAddressClassDebug;
406       case eSymbolTypeHeaderFile:
407         return eAddressClassDebug;
408       case eSymbolTypeObjectFile:
409         return eAddressClassDebug;
410       case eSymbolTypeCommonBlock:
411         return eAddressClassDebug;
412       case eSymbolTypeBlock:
413         return eAddressClassDebug;
414       case eSymbolTypeLocal:
415         return eAddressClassData;
416       case eSymbolTypeParam:
417         return eAddressClassData;
418       case eSymbolTypeVariable:
419         return eAddressClassData;
420       case eSymbolTypeVariableType:
421         return eAddressClassDebug;
422       case eSymbolTypeLineEntry:
423         return eAddressClassDebug;
424       case eSymbolTypeLineHeader:
425         return eAddressClassDebug;
426       case eSymbolTypeScopeBegin:
427         return eAddressClassDebug;
428       case eSymbolTypeScopeEnd:
429         return eAddressClassDebug;
430       case eSymbolTypeAdditional:
431         return eAddressClassUnknown;
432       case eSymbolTypeCompiler:
433         return eAddressClassDebug;
434       case eSymbolTypeInstrumentation:
435         return eAddressClassDebug;
436       case eSymbolTypeUndefined:
437         return eAddressClassUnknown;
438       case eSymbolTypeObjCClass:
439         return eAddressClassRuntime;
440       case eSymbolTypeObjCMetaClass:
441         return eAddressClassRuntime;
442       case eSymbolTypeObjCIVar:
443         return eAddressClassRuntime;
444       case eSymbolTypeReExported:
445         return eAddressClassRuntime;
446       }
447     }
448   }
449   return eAddressClassUnknown;
450 }
451 
452 DataBufferSP ObjectFile::ReadMemory(const ProcessSP &process_sp,
453                                     lldb::addr_t addr, size_t byte_size) {
454   DataBufferSP data_sp;
455   if (process_sp) {
456     std::unique_ptr<DataBufferHeap> data_ap(new DataBufferHeap(byte_size, 0));
457     Error error;
458     const size_t bytes_read = process_sp->ReadMemory(
459         addr, data_ap->GetBytes(), data_ap->GetByteSize(), error);
460     if (bytes_read == byte_size)
461       data_sp.reset(data_ap.release());
462   }
463   return data_sp;
464 }
465 
466 size_t ObjectFile::GetData(lldb::offset_t offset, size_t length,
467                            DataExtractor &data) const {
468   // The entire file has already been mmap'ed into m_data, so just copy from
469   // there
470   // as the back mmap buffer will be shared with shared pointers.
471   return data.SetData(m_data, offset, length);
472 }
473 
474 size_t ObjectFile::CopyData(lldb::offset_t offset, size_t length,
475                             void *dst) const {
476   // The entire file has already been mmap'ed into m_data, so just copy from
477   // there
478   // Note that the data remains in target byte order.
479   return m_data.CopyData(offset, length, dst);
480 }
481 
482 size_t ObjectFile::ReadSectionData(const Section *section,
483                                    lldb::offset_t section_offset, void *dst,
484                                    size_t dst_len) const {
485   assert(section);
486   section_offset *= section->GetTargetByteSize();
487 
488   // If some other objectfile owns this data, pass this to them.
489   if (section->GetObjectFile() != this)
490     return section->GetObjectFile()->ReadSectionData(section, section_offset,
491                                                      dst, dst_len);
492 
493   if (IsInMemory()) {
494     ProcessSP process_sp(m_process_wp.lock());
495     if (process_sp) {
496       Error error;
497       const addr_t base_load_addr =
498           section->GetLoadBaseAddress(&process_sp->GetTarget());
499       if (base_load_addr != LLDB_INVALID_ADDRESS)
500         return process_sp->ReadMemory(base_load_addr + section_offset, dst,
501                                       dst_len, error);
502     }
503   } else {
504     const lldb::offset_t section_file_size = section->GetFileSize();
505     if (section_offset < section_file_size) {
506       const size_t section_bytes_left = section_file_size - section_offset;
507       size_t section_dst_len = dst_len;
508       if (section_dst_len > section_bytes_left)
509         section_dst_len = section_bytes_left;
510       return CopyData(section->GetFileOffset() + section_offset,
511                       section_dst_len, dst);
512     } else {
513       if (section->GetType() == eSectionTypeZeroFill) {
514         const uint64_t section_size = section->GetByteSize();
515         const uint64_t section_bytes_left = section_size - section_offset;
516         uint64_t section_dst_len = dst_len;
517         if (section_dst_len > section_bytes_left)
518           section_dst_len = section_bytes_left;
519         memset(dst, 0, section_dst_len);
520         return section_dst_len;
521       }
522     }
523   }
524   return 0;
525 }
526 
527 //----------------------------------------------------------------------
528 // Get the section data the file on disk
529 //----------------------------------------------------------------------
530 size_t ObjectFile::ReadSectionData(const Section *section,
531                                    DataExtractor &section_data) const {
532   // If some other objectfile owns this data, pass this to them.
533   if (section->GetObjectFile() != this)
534     return section->GetObjectFile()->ReadSectionData(section, section_data);
535 
536   if (IsInMemory()) {
537     ProcessSP process_sp(m_process_wp.lock());
538     if (process_sp) {
539       const addr_t base_load_addr =
540           section->GetLoadBaseAddress(&process_sp->GetTarget());
541       if (base_load_addr != LLDB_INVALID_ADDRESS) {
542         DataBufferSP data_sp(
543             ReadMemory(process_sp, base_load_addr, section->GetByteSize()));
544         if (data_sp) {
545           section_data.SetData(data_sp, 0, data_sp->GetByteSize());
546           section_data.SetByteOrder(process_sp->GetByteOrder());
547           section_data.SetAddressByteSize(process_sp->GetAddressByteSize());
548           return section_data.GetByteSize();
549         }
550       }
551     }
552     return GetData(section->GetFileOffset(), section->GetFileSize(),
553                    section_data);
554   } else {
555     // The object file now contains a full mmap'ed copy of the object file data,
556     // so just use this
557     return MemoryMapSectionData(section, section_data);
558   }
559 }
560 
561 size_t ObjectFile::MemoryMapSectionData(const Section *section,
562                                         DataExtractor &section_data) const {
563   // If some other objectfile owns this data, pass this to them.
564   if (section->GetObjectFile() != this)
565     return section->GetObjectFile()->MemoryMapSectionData(section,
566                                                           section_data);
567 
568   if (IsInMemory()) {
569     return ReadSectionData(section, section_data);
570   } else {
571     // The object file now contains a full mmap'ed copy of the object file data,
572     // so just use this
573     return GetData(section->GetFileOffset(), section->GetFileSize(),
574                    section_data);
575   }
576 }
577 
578 bool ObjectFile::SplitArchivePathWithObject(const char *path_with_object,
579                                             FileSpec &archive_file,
580                                             ConstString &archive_object,
581                                             bool must_exist) {
582   RegularExpression g_object_regex(llvm::StringRef("(.*)\\(([^\\)]+)\\)$"));
583   RegularExpression::Match regex_match(2);
584   if (g_object_regex.Execute(llvm::StringRef::withNullAsEmpty(path_with_object),
585                              &regex_match)) {
586     std::string path;
587     std::string obj;
588     if (regex_match.GetMatchAtIndex(path_with_object, 1, path) &&
589         regex_match.GetMatchAtIndex(path_with_object, 2, obj)) {
590       archive_file.SetFile(path, false);
591       archive_object.SetCString(obj.c_str());
592       if (must_exist && !archive_file.Exists())
593         return false;
594       return true;
595     }
596   }
597   return false;
598 }
599 
600 void ObjectFile::ClearSymtab() {
601   ModuleSP module_sp(GetModule());
602   if (module_sp) {
603     std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
604     Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_OBJECT));
605     if (log)
606       log->Printf("%p ObjectFile::ClearSymtab () symtab = %p",
607                   static_cast<void *>(this),
608                   static_cast<void *>(m_symtab_ap.get()));
609     m_symtab_ap.reset();
610   }
611 }
612 
613 SectionList *ObjectFile::GetSectionList(bool update_module_section_list) {
614   if (m_sections_ap.get() == nullptr) {
615     if (update_module_section_list) {
616       ModuleSP module_sp(GetModule());
617       if (module_sp) {
618         std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
619         CreateSections(*module_sp->GetUnifiedSectionList());
620       }
621     } else {
622       SectionList unified_section_list;
623       CreateSections(unified_section_list);
624     }
625   }
626   return m_sections_ap.get();
627 }
628 
629 lldb::SymbolType
630 ObjectFile::GetSymbolTypeFromName(llvm::StringRef name,
631                                   lldb::SymbolType symbol_type_hint) {
632   if (!name.empty()) {
633     if (name.startswith("_OBJC_")) {
634       // ObjC
635       if (name.startswith("_OBJC_CLASS_$_"))
636         return lldb::eSymbolTypeObjCClass;
637       if (name.startswith("_OBJC_METACLASS_$_"))
638         return lldb::eSymbolTypeObjCMetaClass;
639       if (name.startswith("_OBJC_IVAR_$_"))
640         return lldb::eSymbolTypeObjCIVar;
641     } else if (name.startswith(".objc_class_name_")) {
642       // ObjC v1
643       return lldb::eSymbolTypeObjCClass;
644     }
645   }
646   return symbol_type_hint;
647 }
648 
649 ConstString ObjectFile::GetNextSyntheticSymbolName() {
650   StreamString ss;
651   ConstString file_name = GetModule()->GetFileSpec().GetFilename();
652   ss.Printf("___lldb_unnamed_symbol%u$$%s", ++m_synthetic_symbol_idx,
653             file_name.GetCString());
654   return ConstString(ss.GetString());
655 }
656 
657 Error ObjectFile::LoadInMemory(Target &target, bool set_pc) {
658   Error error;
659   ProcessSP process = target.CalculateProcess();
660   if (!process)
661     return Error("No Process");
662   if (set_pc && !GetEntryPointAddress().IsValid())
663     return Error("No entry address in object file");
664 
665   SectionList *section_list = GetSectionList();
666   if (!section_list)
667       return Error("No section in object file");
668   size_t section_count = section_list->GetNumSections(0);
669   for (size_t i = 0; i < section_count; ++i) {
670     SectionSP section_sp = section_list->GetSectionAtIndex(i);
671     addr_t addr = target.GetSectionLoadList().GetSectionLoadAddress(section_sp);
672     if (addr != LLDB_INVALID_ADDRESS) {
673       DataExtractor section_data;
674       // We can skip sections like bss
675       if (section_sp->GetFileSize() == 0)
676         continue;
677       section_sp->GetSectionData(section_data);
678       lldb::offset_t written = process->WriteMemory(
679           addr, section_data.GetDataStart(), section_data.GetByteSize(), error);
680       if (written != section_data.GetByteSize())
681         return error;
682     }
683   }
684   if (set_pc) {
685     ThreadList &thread_list = process->GetThreadList();
686     ThreadSP curr_thread(thread_list.GetSelectedThread());
687     RegisterContextSP reg_context(curr_thread->GetRegisterContext());
688     Address file_entry = GetEntryPointAddress();
689     reg_context->SetPC(file_entry.GetLoadAddress(&target));
690   }
691   return error;
692 }
693